/*
THIS IS A GENERATED/BUNDLED FILE BY ROLLUP
if you want to view the source visit the plugins github repository
*/

'use strict';

var obsidian = require('obsidian');

/******************************************************************************
Copyright (c) Microsoft Corporation.

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
***************************************************************************** */

function __awaiter(thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
}

typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) {
    var e = new Error(message);
    return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e;
};

function around(obj, factories) {
    const removers = Object.keys(factories).map(key => around1(obj, key, factories[key]));
    return removers.length === 1 ? removers[0] : function () { removers.forEach(r => r()); };
}
function around1(obj, method, createWrapper) {
    const original = obj[method], hadOwn = obj.hasOwnProperty(method);
    let current = createWrapper(original);
    // Let our wrapper inherit static props from the wrapping method,
    // and the wrapping method, props from the original method
    if (original)
        Object.setPrototypeOf(current, original);
    Object.setPrototypeOf(wrapper, current);
    obj[method] = wrapper;
    // Return a callback to allow safe removal
    return remove;
    function wrapper(...args) {
        // If we have been deactivated and are no longer wrapped, remove ourselves
        if (current === original && obj[method] === wrapper)
            remove();
        return current.apply(this, args);
    }
    function remove() {
        // If no other patches, just do a direct removal
        if (obj[method] === wrapper) {
            if (hadOwn)
                obj[method] = original;
            else
                delete obj[method];
        }
        if (current === original)
            return;
        // Else pass future calls through, and remove wrapper from the prototype chain
        current = original;
        Object.setPrototypeOf(wrapper, original || Function);
    }
}

// العربية
var ar = {};

// čeština
var cz = {};

// Dansk
var da = {};

// Deutsch
var de = {
    // main.ts
    "Open as mindmap board": "Öffne als Mindmap",
    "Create new mindmap": "Erstelle neue Mindmap",
    "New mindmap board": "Neue Mindmap",
    "Untitled mindmap": "Unbenannte Mindmap",
    "Open as markdown": "Öffne als Markdown",
    //Execute.ts
    "Sub title": "Untertitel",
    "Export to opml": "Exportiere als opml",
    "Export to image": "Exportiere als Bild",
    //setting
    "Canvas size": "Leinwandgröße",
    "Canvas size desc": "Breite und Höhe der Leinwand",
    "Canvas background": "Leinwand Hintergrund",
    "Canvas background desc": "Hintergrundfarbe der Leinwand",
    "Max level of node to markdown head": "Maximale Knotenebene welche eine Überschrift erstellt",
    "Max level of node to markdown head desc": "Angeben, welche Knotenebene eine separate Überschrift anstelle eines Listenelements erstellt.",
    "Font size": "Schriftgröße",
    "Font size desc": "Gebe die Schriftgröße ans",
    "Mind map layout direct": "Mindmap Layout",
    "Mind map layout direct desc": "Geben Sie die Richtung an, in der die Knoten in Ihrer Mindmap platziert werden.",
    "Right": "Rechts",
    "Left": "Links",
    "Centered": "Zentriert"
};

// English
var en = {
    // main.ts
    "Open as mindmap board": "Open as mindmap board",
    "Create new mindmap": "Create new mindmap",
    "New mindmap board": "New mindmap board",
    "Untitled mindmap": "Untitled mindmap",
    "Open as markdown": "Open as markdown",
    //Execute.ts
    "Sub title": "Sub title",
    "Export to opml": "Export to opml",
    "Export to image": "Export to image",
    //setting
    "Canvas size": "Canvas size",
    "Canvas size desc": "Width and height of the canvas",
    "Canvas background": "Canvas background",
    "Canvas background desc": "Background color of canvas",
    "Max level of node to markdown head": "Max level of node to create a Heading",
    "Max level of node to markdown head desc": "Specify which Node Level creates a seperate Heading instead of a List-Item",
    "Font size": "Font Size",
    "Font size desc": "Specify the Font Size",
    "Mind map layout direct": "Mindmap Layout",
    "Mind map layout direct desc": "Specify the direction the nodes are placed in your Mindmap",
    "Right": "Right",
    "Left": "Left",
    "Centered": "Centered",
    "Clockwise": "Clockwise",
    "Stroke Array": "Stroke array",
    "Stroke Array Desc": "Node link color base on this value or random color",
    "Save fail": "Save data err",
    "Save success": "Save data success",
    "Toggle markdown/mindmap": "Toggle to markdown/mindmap mode",
    "Copy node": "Copy",
    "Paste node": "Paste",
    "Export to html": "Export to html"
};

// British English
var enGB = {};

// Español
var es = {};

// français
var fr = {};

// हिन्दी
var hi = {};

// Bahasa Indonesia
var id = {};

// Italiano
var it = {};

// 日本語
var ja = {};

// 한국어
var ko = {};

// Nederlands
var nl = {};

// Norsk
var no = {};

// język polski	
var pl = {};

// Português
var pt = {};

// Português do Brasil
// Brazilian Portuguese
var ptBR = {};

// Română
var ro = {};

// русский
var ru = {};

// Türkçe
var tr = {};

// 简体中文
var zhCN = {
    // main.ts
    "Open as mindmap board": "打开为思维导图",
    "Create new mindmap": "创建新思维导图",
    "New mindmap board": "新建思维导图",
    "Untitled mindmap": "未命名思维导图",
    "Open as markdown": "打开为 Markdown 文件",
    //Execute.ts
    "Sub title": "新节点",
    "Export to opml": "导出至OPML",
    "Export to image": "导出至图片",
    //setting
    "Canvas size": "画布尺寸",
    "Canvas size desc": "绘制思维导图画布的宽度和高度",
    "Canvas background": "背景颜色",
    "Canvas background desc": "画布的背景颜色",
    "Max level of node to markdown head": "节点文字转为markdown标题的最大层级",
    "Max level of node to markdown head desc": "将小于该层级的节点文字转为markdown标题，最大层级为6，因为HTML标题支持最大为6级",
    "Font size": "文字大小",
    "Font size desc": "思维导图文字默认大小，单位px",
    "Mind map layout direct": "思维导图布局方向",
    "Mind map layout direct desc": "思维导图的布局方向，分为向两侧发散、仅右侧、仅左侧三个方向",
    // wait to use
    "Expand node": "展开节点",
    "Collapse node": "收缩节点",
    "Only show this node": "仅显示该节点",
    "Expand all node": "展开所有节点",
    "Collapse all node": "收缩所有节点",
    "Add relate link": "添加联系线",
    "Remove relate link": "删除联系线",
    "Add summary node": "添加归纳",
    "Remove summary node": "删除归纳",
    "Remove node": "删除节点",
    "Only remove this node": "仅删除该节点",
    "Add child node": "添加子节点",
    "Add brother node": "添加兄弟节点",
    "Stroke Array": "颜色组",
    "Stroke Array Desc": "节点连线颜色将按照颜色组生成,否则生成随机颜色",
    "Save fail": "保存失败",
    "Save success": "保存成功",
    "Toggle markdown/mindmap": "切换为 markdown 或 mindmap 模式",
    "Copy node": "复制",
    "Paste node": "粘贴",
    "Export to html": "导出为 html"
};

// 繁體中文
var zhTW = {};

const localeMap = {
    ar,
    cs: cz,
    da,
    de,
    en,
    "en-gb": enGB,
    es,
    fr,
    hi,
    id,
    it,
    ja,
    ko,
    nl,
    nn: no,
    pl,
    pt,
    "pt-br": ptBR,
    ro,
    ru,
    tr,
    "zh-cn": zhCN,
    "zh-tw": zhTW,
};
const locale = localeMap[obsidian.moment.locale()];
function t(str) {
    if (!locale) {
        console.error("Error: kanban locale not found", obsidian.moment.locale());
    }
    return (locale && locale[str]) || en[str];
}

const FRONT_MATTER_REGEX = /^(---)$.+?^(---)$.+?/ims;
const frontMatterKey = 'mindmap-plugin';
const basicFrontmatter = [
    "---",
    "",
    `${frontMatterKey}: basic`,
    "",
    "---",
    "",
    "",
].join("\n");

function keepLastIndex(dom) {
    if (window.getSelection) { //ie11 10 9 ff safari
        dom.focus(); //ff
        var range = window.getSelection();
        range.selectAllChildren(dom);
        range.collapseToEnd();
    }
    // else if ( document.selection ) { //ie10 9 8 7 6 5
    //     var range = document.selection.createRange(); 
    //     range.moveToElementText(dom);
    //     range.collapse(false);
    //     range.select();
    // }
}
class Node {
    constructor(data, mindMap) {
        this.box = {
            x: 0,
            y: 0,
            width: 0,
            height: 0
        };
        this.isExpand = true;
        this.isSelect = false;
        this.children = [];
        this.isHide = false;
        this.isEdit = false;
        this._barDom = null;
        this.data = data;
        this.mindmap = mindMap;
        this.initDom();
    }
    getId() {
        return this.data.id;
    }
    initDom() {
        this.containEl = document.createElement('div');
        this.containEl.classList.add('mm-node');
        this.containEl.setAttribute('contentEditable', 'false');
        this.containEl.setAttribute('tabIndex', '-1');
        this.containEl.setAttribute('data-id', this.data.id);
        this.containEl.setAttribute('draggable', 'false');
        this.contentEl = document.createElement('div');
        this.contentEl.classList.add('mm-node-content');
        this.containEl.appendChild(this.contentEl);
        //this.containEl.textContent = this.data.text;
        this.initNodeBar();
        if (this.data.isRoot) {
            this.containEl.classList.add('mm-root');
            this.isRoot = true;
        }
        this.parseText();
    }
    initNodeBar() {
        this._barDom = document.createElement('div');
        this._barDom.classList.add('mm-node-bar');
        this.containEl.appendChild(this._barDom);
    }
    parseText() {
        if (this.data.text.length === 0) {
            this.data.text = "Sub title";
        }
        obsidian.MarkdownRenderer.renderMarkdown(this.data.text, this.contentEl, this.mindmap.path || "", null).then(() => {
            this.data.mdText = this.contentEl.innerHTML;
            this.refreshBox();
            this.mindmap && this.mindmap.emit('initNode', {});
            this._delay();
        });
    }
    _delay() {
        //parse md
        this.contentEl.findAll(".internal-embed").forEach((el) => __awaiter(this, void 0, void 0, function* () {
            const src = el.getAttribute("src");
            if (typeof src === 'string') {
                var pathObj = obsidian.parseLinktext(src);
                var fileData = '';
                if (this.mindmap && this.mindmap.view) {
                    var f = this.mindmap.view.app.metadataCache.getFirstLinkpathDest(pathObj.path, this.mindmap.path);
                    if (f instanceof obsidian.TFile && f.extension === 'md') {
                        fileData = yield this.mindmap.view.app.vault.adapter.read(f.path);
                        var markdownEmbed = document.createElement('div');
                        markdownEmbed.classList.add('markdown-embed');
                        //  var  markdownHead = document.createElement('div');
                        //  markdownHead.classList.add('markdown-embed-title');
                        //  markdownHead.innerText=f.basename;
                        markdownEmbed.setAttribute('data-name', f.path);
                        var markdownContent = document.createElement('div');
                        markdownContent.classList.add('markdown-embed-content');
                        var markdownPreview = document.createElement('div');
                        markdownPreview.classList.add('markdown-preview-view');
                        markdownContent.appendChild(markdownPreview);
                        var markdownLink = document.createElement('div');
                        markdownLink.classList.add('markdown-embed-link');
                        markdownLink.setAttribute('aria-label', 'Open link');
                        markdownLink.innerHTML = `<a data-href="${src}" href="${src}" class="internal-link" target="_blank" rel="noopener"><svg viewBox="0 0 100 100" class="link" width="20" height="20"><path fill="currentColor" stroke="currentColor" d="M74,8c-4.8,0-9.3,1.9-12.7,5.3l-10,10c-2.9,2.9-4.7,6.6-5.1,10.6C46,34.6,46,35.3,46,36c0,2.7,0.6,5.4,1.8,7.8l3.1-3.1 C50.3,39.2,50,37.6,50,36c0-3.7,1.5-7.3,4.1-9.9l10-10c2.6-2.6,6.2-4.1,9.9-4.1s7.3,1.5,9.9,4.1c2.6,2.6,4.1,6.2,4.1,9.9 s-1.5,7.3-4.1,9.9l-10,10C71.3,48.5,67.7,50,64,50c-1.6,0-3.2-0.3-4.7-0.8l-3.1,3.1c2.4,1.1,5,1.8,7.8,1.8c4.8,0,9.3-1.9,12.7-5.3 l10-10C90.1,35.3,92,30.8,92,26s-1.9-9.3-5.3-12.7C83.3,9.9,78.8,8,74,8L74,8z M62,36c-0.5,0-1,0.2-1.4,0.6l-24,24 c-0.5,0.5-0.7,1.2-0.6,1.9c0.2,0.7,0.7,1.2,1.4,1.4c0.7,0.2,1.4,0,1.9-0.6l24-24c0.6-0.6,0.8-1.5,0.4-2.2C63.5,36.4,62.8,36,62,36 z M36,46c-4.8,0-9.3,1.9-12.7,5.3l-10,10c-3.1,3.1-5,7.2-5.2,11.6c0,0.4,0,0.8,0,1.2c0,4.8,1.9,9.3,5.3,12.7 C16.7,90.1,21.2,92,26,92s9.3-1.9,12.7-5.3l10-10C52.1,73.3,54,68.8,54,64c0-2.7-0.6-5.4-1.8-7.8l-3.1,3.1 c0.5,1.5,0.8,3.1,0.8,4.7c0,3.7-1.5,7.3-4.1,9.9l-10,10C33.3,86.5,29.7,88,26,88s-7.3-1.5-9.9-4.1S12,77.7,12,74 c0-3.7,1.5-7.3,4.1-9.9l10-10c2.6-2.6,6.2-4.1,9.9-4.1c1.6,0,3.2,0.3,4.7,0.8l3.1-3.1C41.4,46.6,38.7,46,36,46L36,46z"></path></svg></a>`;
                        el.appendChild(markdownEmbed);
                        //  markdownEmbed.appendChild(markdownHead);
                        markdownEmbed.appendChild(markdownContent);
                        markdownEmbed.appendChild(markdownLink);
                        if (pathObj.subpath) {
                            var metacache = this.mindmap.view.app.metadataCache.getFileCache(f);
                            var t = obsidian.resolveSubpath(metacache, pathObj.subpath);
                            //   console.log(t);
                            if (t && t.start && t.end) {
                                var md = fileData.substring(t.start.offset, t.end.offset);
                                // console.log(md)
                            }
                            else if (t && t.start && !t.end) {
                                var md = fileData.substr(t.start.offset);
                            }
                            else {
                                var md = fileData || '';
                            }
                        }
                        else {
                            var md = fileData || '';
                        }
                        if (md) {
                            obsidian.MarkdownRenderer.renderMarkdown(md, markdownPreview, this.mindmap.path || "", null).then(() => {
                                // this.data.mdText = this.editDom.innerHTML;
                                this.refreshBox();
                                //this._delay();
                                this.mindmap && this.mindmap.emit('renderEditNode', { node: this });
                            });
                        }
                    }
                }
            }
        }));
        //parse image
        setTimeout(() => {
            this.contentEl.findAll(".internal-embed").forEach((el) => {
                var _a;
                const src = el.getAttribute("src");
                const target = typeof src === "string" &&
                    this.mindmap && ((_a = this.mindmap.view) === null || _a === void 0 ? void 0 : _a.app.metadataCache.getFirstLinkpathDest(src, this.mindmap.path));
                if (target instanceof obsidian.TFile && target.extension !== "md" && this.mindmap) {
                    el.innerText = "";
                    el.createEl("img", { attr: { src: this.mindmap.view.app.vault.getResourcePath(target) } }, (img) => {
                        if (el.hasAttribute("width"))
                            img.setAttribute("width", el.getAttribute("width"));
                        if (el.hasAttribute("alt"))
                            img.setAttribute("alt", el.getAttribute("alt"));
                    });
                    el.addClasses(["image-embed", "is-loaded"]);
                }
            });
            //Possible causes of delay,code mathjax  
            var dom = this.contentEl.querySelector('code') || this.contentEl.querySelector('.MathJax');
            if (dom) {
                setTimeout(() => {
                    this.clearCacheData();
                    this.refreshBox();
                    this.mindmap && this.mindmap.emit('renderEditNode', {});
                }, 100);
            }
            //image 
            this.contentEl.querySelectorAll('img').forEach(element => {
                element.onload = () => {
                    this.clearCacheData();
                    this.refreshBox();
                    this.mindmap && this.mindmap.emit('renderEditNode', {});
                };
                element.onerror = () => {
                    this.clearCacheData();
                    this.refreshBox();
                    this.mindmap && this.mindmap.emit('renderEditNode', {});
                };
                element.setAttribute('draggble', 'false');
            });
        }, 100);
    }
    select() {
        this.isSelect = true;
        this.containEl.setAttribute('draggable', 'true');
        Object.assign(window, {
            myNode: this
        });
        if (!this.containEl.classList.contains('mm-node-select')) {
            this.containEl.classList.add('mm-node-select');
        }
        this.mindmap.selectNode = this;
    }
    unSelect() {
        this.isSelect = false;
        this.containEl.setAttribute('draggable', 'false');
        if (this.containEl.classList.contains('mm-node-select')) {
            this.containEl.classList.remove('mm-node-select');
        }
    }
    edit() {
        this.contentEl.innerText = '';
        this._oldText = this.data.text;
        //var _t =  this.data.text.replace(/\r\n/g,"<br/>")
        // _t = _t.replace(/\n/g,"<br/>");
        //  console.log(_t);
        this.contentEl.innerText = this.data.text;
        this.contentEl.setAttribute('contentEditable', 'true');
        this.contentEl.focus();
        this.mindmap.editNode = this;
        this.isEdit = true;
        keepLastIndex(this.contentEl);
        if (this.contentEl.innerText == t('Sub title')) {
            this.selectText();
        }
        if (!this.containEl.classList.contains('mm-edit-node')) {
            this.containEl.classList.add('mm-edit-node');
        }
    }
    selectText() {
        var text = this.contentEl;
        // if (document.body.createTextRange) {
        //     var range = document.body.createTextRange();
        //     range.moveToElementText(text);
        //     range.select();
        // } 
        if (window.getSelection) {
            var selection = window.getSelection();
            var range = document.createRange();
            range.selectNodeContents(text);
            selection.removeAllRanges();
            selection.addRange(range);
        }
    }
    cancelEdit() {
        var text = this.contentEl.innerText.trim() || '';
        if (text.length == 0) {
            text = this._oldText;
        }
        this.data.text = text;
        this.contentEl.innerText = '';
        obsidian.MarkdownRenderer.renderMarkdown(text, this.contentEl, this.mindmap.path || "", null).then(() => {
            this.data.mdText = this.contentEl.innerHTML;
            this.refreshBox();
            this._delay();
        });
        if (text != this._oldText) {
            this.mindmap.execute('changeNodeText', {
                node: this,
                text,
                oldText: this._oldText
            });
        }
        this.contentEl.setAttribute('contentEditable', 'false');
        this.isEdit = false;
        if (this.containEl.classList.contains('mm-edit-node')) {
            this.containEl.classList.remove('mm-edit-node');
        }
    }
    getLevel() {
        var level = 0, parent = this.parent;
        if (this == this.mindmap.root) {
            return level;
        }
        level++;
        while (parent && parent != this.mindmap.root) {
            level++;
            parent = parent.parent;
        }
        return level;
    }
    getChildren() {
        return this.children;
    }
    setPosition(x, y) {
        this.box.x = x;
        this.box.y = y;
        this.containEl.style.left = x + 'px';
        this.containEl.style.top = y + 'px';
    }
    getPosition() {
        return {
            x: this.box.x,
            y: this.box.y
        };
    }
    move(dx, dy) {
        var p = this.getPosition();
        this.setPosition(p.x + dx, p.y + dy);
    }
    getData() {
        return JSON.parse(JSON.stringify(this.data));
    }
    refreshBox() {
        this.box = this.getDomBox();
    }
    getBox() {
        return Object.assign({}, this.box);
    }
    getCBox() {
        return Object.assign({}, this.box);
    }
    getDomBox() {
        var t = parseInt(this.containEl.style.top);
        var l = parseInt(this.containEl.style.left);
        var w = Math.ceil(this.contentEl.offsetWidth);
        var h = Math.ceil(this.contentEl.offsetHeight);
        return {
            x: l,
            y: t,
            width: w,
            height: h,
            th: 0,
            bh: 0
        };
    }
    getShowNodeList() {
        var list = [];
        (function getList(node) {
            if (node.isShow()) {
                list.push(node);
            }
            node.children.forEach((n) => {
                getList(n);
            });
        })(this);
        return list;
    }
    getSiblings() {
        if (this.parent) {
            return this.parent.children.filter(item => item != this);
        }
        else {
            return [];
        }
    }
    isLeaf() {
        return !this.children.length;
    }
    isShow() {
        return !this.isHide;
    }
    show() {
        this.containEl.style.display = "block";
        this.isHide = false;
    }
    hide() {
        this.containEl.style.display = "none";
        this.isHide = true;
    }
    clearCacheData() {
        var anchor = this;
        while (anchor) {
            anchor.boundingRect = null;
            anchor = anchor.parent;
        }
    }
    addChild(node, i) {
        if (this.children.indexOf(node) == -1) {
            if (i > -1) {
                if (i > this.children.length)
                    i = this.children.length;
                this.children.splice(i, 0, node);
            }
            else {
                this.children.push(node);
            }
            node.parent = this;
        }
    }
    removeChild(child) {
        var index = this.children.indexOf(child);
        if (index > -1) {
            this.children.splice(index, 1);
        }
        return index;
    }
    setText(text) {
        this.data.text = text;
        this.contentEl.innerHTML = '';
        this.parseText();
    }
    expand() {
        this.isExpand = true;
        function show(node) {
            node.show();
            node.refreshBox();
            node.boundingRect = null;
            if (node.isExpand) {
                node.children.forEach(c => {
                    show(c);
                });
            }
        }
        show(this);
        if (this.containEl.classList.contains('mm-node-collapse')) {
            this.containEl.classList.remove('mm-node-collapse');
        }
    }
    collapse() {
        this.isExpand = false;
        function hide(node) {
            node.hide();
            if (node.isExpand) {
                node.children.forEach(c => {
                    hide(c);
                });
            }
        }
        this.children.forEach((c) => {
            hide(c);
        });
        if (!this.containEl.classList.contains('mm-node-collapse')) {
            this.containEl.classList.add('mm-node-collapse');
        }
    }
}

var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

function createCommonjsModule(fn) {
  var module = { exports: {} };
	return fn(module, module.exports), module.exports;
}

function commonjsRequire (path) {
	throw new Error('Could not dynamically require "' + path + '". Please configure the dynamicRequireTargets or/and ignoreDynamicRequires option of @rollup/plugin-commonjs appropriately for this require call to work.');
}

var randomColor = createCommonjsModule(function (module, exports) {
(function(root, factory) {

  // Support CommonJS
  {
    var randomColor = factory();

    // Support NodeJS & Component, which allow module.exports to be a function
    if (module && module.exports) {
      exports = module.exports = randomColor;
    }

    // Support CommonJS 1.1.1 spec
    exports.randomColor = randomColor;

  // Support AMD
  }

}(commonjsGlobal, function() {

  // Seed to get repeatable colors
  var seed = null;

  // Shared color dictionary
  var colorDictionary = {};

  // Populate the color dictionary
  loadColorBounds();

  // check if a range is taken
  var colorRanges = [];

  var randomColor = function (options) {

    options = options || {};

    // Check if there is a seed and ensure it's an
    // integer. Otherwise, reset the seed value.
    if (options.seed !== undefined && options.seed !== null && options.seed === parseInt(options.seed, 10)) {
      seed = options.seed;

    // A string was passed as a seed
    } else if (typeof options.seed === 'string') {
      seed = stringToInteger(options.seed);

    // Something was passed as a seed but it wasn't an integer or string
    } else if (options.seed !== undefined && options.seed !== null) {
      throw new TypeError('The seed value must be an integer or string');

    // No seed, reset the value outside.
    } else {
      seed = null;
    }

    var H,S,B;

    // Check if we need to generate multiple colors
    if (options.count !== null && options.count !== undefined) {

      var totalColors = options.count,
          colors = [];
      // Value false at index i means the range i is not taken yet.
      for (var i = 0; i < options.count; i++) {
        colorRanges.push(false);
        }
      options.count = null;

      while (totalColors > colors.length) {

        var color = randomColor(options);

        if (seed !== null) {
          options.seed = seed;
        }

        colors.push(color);
      }

      options.count = totalColors;

      return colors;
    }

    // First we pick a hue (H)
    H = pickHue(options);

    // Then use H to determine saturation (S)
    S = pickSaturation(H, options);

    // Then use S and H to determine brightness (B).
    B = pickBrightness(H, S, options);

    // Then we return the HSB color in the desired format
    return setFormat([H,S,B], options);
  };

  function pickHue(options) {
    if (colorRanges.length > 0) {
      var hueRange = getRealHueRange(options.hue);

      var hue = randomWithin(hueRange);

      //Each of colorRanges.length ranges has a length equal approximatelly one step
      var step = (hueRange[1] - hueRange[0]) / colorRanges.length;

      var j = parseInt((hue - hueRange[0]) / step);

      //Check if the range j is taken
      if (colorRanges[j] === true) {
        j = (j + 2) % colorRanges.length;
      }
      else {
        colorRanges[j] = true;
           }

      var min = (hueRange[0] + j * step) % 359,
          max = (hueRange[0] + (j + 1) * step) % 359;

      hueRange = [min, max];

      hue = randomWithin(hueRange);

      if (hue < 0) {hue = 360 + hue;}
      return hue
    }
    else {
      var hueRange = getHueRange(options.hue);

      hue = randomWithin(hueRange);
      // Instead of storing red as two seperate ranges,
      // we group them, using negative numbers
      if (hue < 0) {
        hue = 360 + hue;
      }

      return hue;
    }
  }

  function pickSaturation (hue, options) {

    if (options.hue === 'monochrome') {
      return 0;
    }

    if (options.luminosity === 'random') {
      return randomWithin([0,100]);
    }

    var saturationRange = getSaturationRange(hue);

    var sMin = saturationRange[0],
        sMax = saturationRange[1];

    switch (options.luminosity) {

      case 'bright':
        sMin = 55;
        break;

      case 'dark':
        sMin = sMax - 10;
        break;

      case 'light':
        sMax = 55;
        break;
   }

    return randomWithin([sMin, sMax]);

  }

  function pickBrightness (H, S, options) {

    var bMin = getMinimumBrightness(H, S),
        bMax = 100;

    switch (options.luminosity) {

      case 'dark':
        bMax = bMin + 20;
        break;

      case 'light':
        bMin = (bMax + bMin)/2;
        break;

      case 'random':
        bMin = 0;
        bMax = 100;
        break;
    }

    return randomWithin([bMin, bMax]);
  }

  function setFormat (hsv, options) {

    switch (options.format) {

      case 'hsvArray':
        return hsv;

      case 'hslArray':
        return HSVtoHSL(hsv);

      case 'hsl':
        var hsl = HSVtoHSL(hsv);
        return 'hsl('+hsl[0]+', '+hsl[1]+'%, '+hsl[2]+'%)';

      case 'hsla':
        var hslColor = HSVtoHSL(hsv);
        var alpha = options.alpha || Math.random();
        return 'hsla('+hslColor[0]+', '+hslColor[1]+'%, '+hslColor[2]+'%, ' + alpha + ')';

      case 'rgbArray':
        return HSVtoRGB(hsv);

      case 'rgb':
        var rgb = HSVtoRGB(hsv);
        return 'rgb(' + rgb.join(', ') + ')';

      case 'rgba':
        var rgbColor = HSVtoRGB(hsv);
        var alpha = options.alpha || Math.random();
        return 'rgba(' + rgbColor.join(', ') + ', ' + alpha + ')';

      default:
        return HSVtoHex(hsv);
    }

  }

  function getMinimumBrightness(H, S) {

    var lowerBounds = getColorInfo(H).lowerBounds;

    for (var i = 0; i < lowerBounds.length - 1; i++) {

      var s1 = lowerBounds[i][0],
          v1 = lowerBounds[i][1];

      var s2 = lowerBounds[i+1][0],
          v2 = lowerBounds[i+1][1];

      if (S >= s1 && S <= s2) {

         var m = (v2 - v1)/(s2 - s1),
             b = v1 - m*s1;

         return m*S + b;
      }

    }

    return 0;
  }

  function getHueRange (colorInput) {

    if (typeof parseInt(colorInput) === 'number') {

      var number = parseInt(colorInput);

      if (number < 360 && number > 0) {
        return [number, number];
      }

    }

    if (typeof colorInput === 'string') {

      if (colorDictionary[colorInput]) {
        var color = colorDictionary[colorInput];
        if (color.hueRange) {return color.hueRange;}
      } else if (colorInput.match(/^#?([0-9A-F]{3}|[0-9A-F]{6})$/i)) {
        var hue = HexToHSB(colorInput)[0];
        return [ hue, hue ];
      }
    }

    return [0,360];

  }

  function getSaturationRange (hue) {
    return getColorInfo(hue).saturationRange;
  }

  function getColorInfo (hue) {

    // Maps red colors to make picking hue easier
    if (hue >= 334 && hue <= 360) {
      hue-= 360;
    }

    for (var colorName in colorDictionary) {
       var color = colorDictionary[colorName];
       if (color.hueRange &&
           hue >= color.hueRange[0] &&
           hue <= color.hueRange[1]) {
          return colorDictionary[colorName];
       }
    } return 'Color not found';
  }

  function randomWithin (range) {
    if (seed === null) {
      //generate random evenly destinct number from : https://martin.ankerl.com/2009/12/09/how-to-create-random-colors-programmatically/
      var golden_ratio = 0.618033988749895;
      var r=Math.random();
      r += golden_ratio;
      r %= 1;
      return Math.floor(range[0] + r*(range[1] + 1 - range[0]));
    } else {
      //Seeded random algorithm from http://indiegamr.com/generate-repeatable-random-numbers-in-js/
      var max = range[1] || 1;
      var min = range[0] || 0;
      seed = (seed * 9301 + 49297) % 233280;
      var rnd = seed / 233280.0;
      return Math.floor(min + rnd * (max - min));
}
  }

  function HSVtoHex (hsv){

    var rgb = HSVtoRGB(hsv);

    function componentToHex(c) {
        var hex = c.toString(16);
        return hex.length == 1 ? '0' + hex : hex;
    }

    var hex = '#' + componentToHex(rgb[0]) + componentToHex(rgb[1]) + componentToHex(rgb[2]);

    return hex;

  }

  function defineColor (name, hueRange, lowerBounds) {

    var sMin = lowerBounds[0][0],
        sMax = lowerBounds[lowerBounds.length - 1][0],

        bMin = lowerBounds[lowerBounds.length - 1][1],
        bMax = lowerBounds[0][1];

    colorDictionary[name] = {
      hueRange: hueRange,
      lowerBounds: lowerBounds,
      saturationRange: [sMin, sMax],
      brightnessRange: [bMin, bMax]
    };

  }

  function loadColorBounds () {

    defineColor(
      'monochrome',
      null,
      [[0,0],[100,0]]
    );

    defineColor(
      'red',
      [-26,18],
      [[20,100],[30,92],[40,89],[50,85],[60,78],[70,70],[80,60],[90,55],[100,50]]
    );

    defineColor(
      'orange',
      [18,46],
      [[20,100],[30,93],[40,88],[50,86],[60,85],[70,70],[100,70]]
    );

    defineColor(
      'yellow',
      [46,62],
      [[25,100],[40,94],[50,89],[60,86],[70,84],[80,82],[90,80],[100,75]]
    );

    defineColor(
      'green',
      [62,178],
      [[30,100],[40,90],[50,85],[60,81],[70,74],[80,64],[90,50],[100,40]]
    );

    defineColor(
      'blue',
      [178, 257],
      [[20,100],[30,86],[40,80],[50,74],[60,60],[70,52],[80,44],[90,39],[100,35]]
    );

    defineColor(
      'purple',
      [257, 282],
      [[20,100],[30,87],[40,79],[50,70],[60,65],[70,59],[80,52],[90,45],[100,42]]
    );

    defineColor(
      'pink',
      [282, 334],
      [[20,100],[30,90],[40,86],[60,84],[80,80],[90,75],[100,73]]
    );

  }

  function HSVtoRGB (hsv) {

    // this doesn't work for the values of 0 and 360
    // here's the hacky fix
    var h = hsv[0];
    if (h === 0) {h = 1;}
    if (h === 360) {h = 359;}

    // Rebase the h,s,v values
    h = h/360;
    var s = hsv[1]/100,
        v = hsv[2]/100;

    var h_i = Math.floor(h*6),
      f = h * 6 - h_i,
      p = v * (1 - s),
      q = v * (1 - f*s),
      t = v * (1 - (1 - f)*s),
      r = 256,
      g = 256,
      b = 256;

    switch(h_i) {
      case 0: r = v; g = t; b = p;  break;
      case 1: r = q; g = v; b = p;  break;
      case 2: r = p; g = v; b = t;  break;
      case 3: r = p; g = q; b = v;  break;
      case 4: r = t; g = p; b = v;  break;
      case 5: r = v; g = p; b = q;  break;
    }

    var result = [Math.floor(r*255), Math.floor(g*255), Math.floor(b*255)];
    return result;
  }

  function HexToHSB (hex) {
    hex = hex.replace(/^#/, '');
    hex = hex.length === 3 ? hex.replace(/(.)/g, '$1$1') : hex;

    var red = parseInt(hex.substr(0, 2), 16) / 255,
          green = parseInt(hex.substr(2, 2), 16) / 255,
          blue = parseInt(hex.substr(4, 2), 16) / 255;

    var cMax = Math.max(red, green, blue),
          delta = cMax - Math.min(red, green, blue),
          saturation = cMax ? (delta / cMax) : 0;

    switch (cMax) {
      case red: return [ 60 * (((green - blue) / delta) % 6) || 0, saturation, cMax ];
      case green: return [ 60 * (((blue - red) / delta) + 2) || 0, saturation, cMax ];
      case blue: return [ 60 * (((red - green) / delta) + 4) || 0, saturation, cMax ];
    }
  }

  function HSVtoHSL (hsv) {
    var h = hsv[0],
      s = hsv[1]/100,
      v = hsv[2]/100,
      k = (2-s)*v;

    return [
      h,
      Math.round(s*v / (k<1 ? k : 2-k) * 10000) / 100,
      k/2 * 100
    ];
  }

  function stringToInteger (string) {
    var total = 0;
    for (var i = 0; i !== string.length; i++) {
      if (total >= Number.MAX_SAFE_INTEGER) break;
      total += string.charCodeAt(i);
    }
    return total
  }

  // get The range of given hue when options.count!=0
  function getRealHueRange(colorHue)
  { if (!isNaN(colorHue)) {
    var number = parseInt(colorHue);

    if (number < 360 && number > 0) {
      return getColorInfo(colorHue).hueRange
    }
  }
    else if (typeof colorHue === 'string') {

      if (colorDictionary[colorHue]) {
        var color = colorDictionary[colorHue];

        if (color.hueRange) {
          return color.hueRange
       }
    } else if (colorHue.match(/^#?([0-9A-F]{3}|[0-9A-F]{6})$/i)) {
        var hue = HexToHSB(colorHue)[0];
        return getColorInfo(hue).hueRange
    }
  }

    return [0,360]
}
  return randomColor;
}));
});

class Layout {
    constructor(node, direct, colors) {
        this.layoutName = 'mindmap';
        this.direct = '';
        this.levelDis = 40;
        this.nodeDis = 8;
        this.firstLevelDis = 80;
        this.firstNodeDis = 20;
        this.isCache = true;
        this.lefts = [];
        this.rights = [];
        this.colors = [];
        this.lineWidth = 2;
        this.root = node || null;
        this.mind = (node === null || node === void 0 ? void 0 : node.mindmap) || null;
        this.direct = direct || 'mindmap';
        this.colors = colors || [];
        if (!this.svgDom)
            this.svgDom = this.mind.edgeGroup.group();
        this.layout();
    }
    setDirect() {
        var me = this;
        var len = this.root.children.length;
        var root = this.root;
        this.rights = [];
        this.lefts = [];
        if (this.direct == 'right') {
            this.rights = root.children;
            this.rights.forEach(r => {
                this._setDirect(r, 'right');
            });
        }
        else if (this.direct == 'left') {
            this.lefts = root.children;
            this.lefts.forEach(r => {
                this._setDirect(r, 'left');
            });
        }
        else if (this.direct == 'clockwise') {
            root.children.forEach(function (child, i) {
                if (i < len / 2) {
                    me.rights.push(child);
                    me._setDirect(child, 'right');
                }
                else {
                    me.lefts.push(child);
                    me._setDirect(child, 'left');
                }
            });
            me.lefts.reverse();
        }
        else {
            root.children.forEach(function (child, i) {
                if (i < len / 2) {
                    me.rights.push(child);
                    me._setDirect(child, 'right');
                }
                else {
                    me.lefts.push(child);
                    me._setDirect(child, 'left');
                }
            });
        }
    }
    _setDirect(n, direct) {
        n.stroke = '';
        n.direct = direct;
        var flag = n.containEl.classList.contains('mm-node-second');
        n.containEl.setAttribute('class', '');
        n.containEl.classList.add('mm-node');
        n.containEl.classList.add('mm-node-' + direct);
        if (n.isLeaf() && !n.containEl.classList.contains('mm-node-leaf')) {
            n.containEl.classList.add('mm-node-leaf');
        }
        else {
            if (n.containEl.classList.contains('mm-node-leaf')) {
                n.containEl.classList.remove('mm-node-leaf');
            }
        }
        if (n.getLevel() == 1) {
            n.containEl.classList.add('mm-node-second');
            n.refreshBox();
        }
        if (flag) {
            n.refreshBox();
        }
        if (!n.isExpand) {
            n.containEl.classList.add('mm-node-collapse');
        }
        n.children.forEach(c => {
            this._setDirect(c, direct);
        });
    }
    layout(node, direct) {
        if (node)
            this.root = node;
        if (direct)
            this.direct = direct;
        this.setDirect();
        if (this.direct == 'right') {
            this.layoutRight();
        }
        else if (this.direct == 'left') {
            this.layoutLeft();
        }
        else {
            this.layoutMindMap();
        }
        this._dolayout();
        // balance layout
        this._doRefresh();
        this.createLink();
    }
    layoutMindMap() {
        this.layoutRight();
        this.layoutLeft();
    }
    layoutRight(arr, parent) {
        var rights = arr || this.rights;
        var p = parent || this.root;
        var pos = p.getPosition();
        var box = p.getBox();
        var plevel = p.getLevel();
        if (plevel == 0) {
            var dis = this.firstLevelDis;
            var nodeDis = this.firstNodeDis;
        }
        else {
            var dis = this.levelDis;
            var nodeDis = this.nodeDis;
        }
        var { disHeight, height } = this._getNodesHeight(rights);
        var h = height / rights.length;
        if (plevel == 0) {
            var next = [parseInt(pos.x + box.width + dis + ''), parseInt(pos.y + box.height / 2 - disHeight / 2 + '')];
        }
        else if (plevel == 1) {
            var next = [parseInt(pos.x + box.width + dis + ''), parseInt(pos.y + box.height / 2 - disHeight / 2 - h / 2 - this.lineWidth / 2 + '')];
        }
        else {
            var next = [parseInt(pos.x + box.width + dis + ''), parseInt(pos.y + box.height - disHeight / 2 - h / 2 + '')];
        }
        rights.forEach((child) => {
            child.setPosition(next[0], next[1]);
            var childBox = child.getBox();
            next[1] += parseInt(childBox.height + nodeDis + '');
        });
        rights.forEach((item) => {
            if (item.isExpand) {
                this.layoutRight(item.children, item);
            }
        });
    }
    layoutLeft(arr, parent) {
        var lefts = arr || this.lefts;
        var p = parent || this.root;
        var pos = p.getPosition();
        var box = p.getBox();
        var plevel = p.getLevel();
        if (plevel == 0) {
            var dis = this.firstLevelDis;
            var nodeDis = this.firstNodeDis;
        }
        else {
            var dis = this.levelDis;
            var nodeDis = this.nodeDis;
        }
        var { disHeight, height } = this._getNodesHeight(lefts);
        var h = height / lefts.length;
        if (plevel == 0) {
            var next = [parseInt(pos.x - dis + ''), parseInt(pos.y + box.height / 2 - disHeight / 2 + '')];
        }
        else if (plevel == 1) {
            var next = [parseInt(pos.x - dis + ''), parseInt(pos.y + box.height / 2 - disHeight / 2 - h / 2 - this.lineWidth / 2 + '')];
        }
        else {
            var next = [parseInt(pos.x - dis + ''), parseInt(pos.y + box.height - disHeight / 2 - h / 2 + '')];
        }
        // var next = [parseInt(pos.x - dis+''), parseInt(pos.y - disHeight / 2 +'')];
        lefts.forEach((child) => {
            var childBox = child.getBox();
            child.setPosition(parseInt(next[0] - childBox.width + ''), parseInt(next[1] + ''));
            next[1] += childBox.height + nodeDis;
        });
        lefts.forEach((item) => {
            if (item.isExpand) {
                this.layoutLeft(item.children, item);
            }
        });
    }
    _getNodesHeight(nodes) {
        if (nodes[0] && nodes[0].getLevel() == 1) {
            var dis = this.firstNodeDis;
        }
        else {
            var dis = this.nodeDis;
        }
        var h = 0;
        var h1 = 0;
        if (nodes.length == 1) {
            var h = nodes[0].getBox().height;
            return {
                disHeight: h,
                height: h
            };
        }
        nodes.forEach((item, index) => {
            var height = item.getBox().height;
            h += height;
            h1 += height;
            if (index != nodes.length - 1) {
                h += dis;
            }
        });
        return {
            disHeight: h,
            height: h1
        };
    }
    _doRefresh() {
        var root = this.root;
        var rootPos = root.getPosition();
        var rootBox = root.getBox();
        var center = rootPos.y + rootBox.height / 2;
        var rights = this.rights;
        var lefts = this.lefts;
        if (rights.length >= 2) {
            var firstNode = rights[0];
            var lastNode = rights[rights.length - 1];
            var firstPos = firstNode.getPosition();
            var lastPos = lastNode.getPosition();
            var lastBox = lastNode.getBox();
            var dis1 = lastPos.y + lastBox.height - center;
            var dis2 = center - firstPos.y;
            if (Math.abs(dis1) != Math.abs(dis2)) {
                var dy = Math.abs(Math.abs(dis1) - Math.abs(dis2)) / 2 + '';
                if (Math.abs(dis1) > Math.abs(dis2)) {
                    rights.forEach(c => {
                        this.moveNode(c, 0, -parseInt(dy));
                    });
                }
                else {
                    rights.forEach(c => {
                        this.moveNode(c, 0, parseInt(dy));
                    });
                }
            }
        }
        if (lefts.length >= 2) {
            var firstNode = lefts[0];
            var lastNode = lefts[lefts.length - 1];
            var firstPos = firstNode.getPosition();
            var lastPos = lastNode.getPosition();
            var lastBox = lastNode.getBox();
            var dis1 = lastPos.y + lastBox.height - center;
            var dis2 = center - firstPos.y;
            if (Math.abs(dis1) != Math.abs(dis2)) {
                var dy = Math.abs(Math.abs(dis1) - Math.abs(dis2)) / 2 + '';
                if (Math.abs(dis1) > Math.abs(dis2)) {
                    lefts.forEach(c => {
                        this.moveNode(c, 0, -parseInt(dy));
                    });
                }
                else {
                    lefts.forEach(c => {
                        this.moveNode(c, 0, parseInt(dy));
                    });
                }
            }
        }
    }
    moveNode(node, dx, dy) {
        node.move(dx, dy);
        node && node.children && node.children.forEach((child) => {
            this.moveNode(child, dx, dy);
        });
    }
    //fix 0.5 line width bug
    linePoint(arr, lineWidth) {
        let num = 0;
        var func;
        if (lineWidth % 2 == 1) {
            num = 0.5;
            func = parseInt;
        }
        else {
            func = Math.ceil;
        }
        var p = arr.map((item) => {
            return [func(item[0]) + num, func(item[1]) + num];
        });
        return p;
    }
    _dolayout() {
        var me = this;
        var mind = this.mind;
        mind.traverseDF((n) => {
            if (n == me.root)
                return;
            if (!n.isExpand) {
                return;
            }
            var box = n.getCBox();
            if (me.isCache && n.boundingRect) {
                var cbox = n.boundingRect;
            }
            else {
                var list = n.getShowNodeList();
                if (list.length) {
                    cbox = mind.getBoundingRect(list);
                }
            }
            if (!cbox)
                return;
            if (n.boundingRect && me.isCache) {
                var topDy = cbox.topDy, downDy = cbox.downDy;
            }
            else {
                topDy = Math.abs(cbox.y - box.y);
                downDy = Math.abs(cbox.y + cbox.height - box.y - box.height);
                cbox.topDy = topDy;
                cbox.downDy = downDy;
                n.boundingRect = cbox;
            }
            me._adjustNode(n, 0, topDy, downDy);
        });
    }
    _adjustNode(node, dx, dy1, dy2) {
        if (!node) {
            return;
        }
        var direct = node.direct;
        if (node && node != this.root) {
            var sibs = node.getSiblings();
            var pos = node.getPosition();
            sibs.forEach((sib) => {
                if (sib.direct == direct) {
                    var sibPos = sib.getPosition();
                    if (sibPos.y > pos.y) {
                        this.moveNode(sib, dx, dy2);
                    }
                    else {
                        this.moveNode(sib, dx, -dy1);
                    }
                }
            });
        }
    }
    refresh(node, direct) {
        this.layout(node, direct);
    }
    createLink() {
        var me = this;
        this.svgDom && this.svgDom.clear();
        if (this.root.getChildren().length == 0) {
            return;
        }
        var dis = this.levelDis;
        var root = this.root;
        var lineWidth = this.lineWidth;
        var rootLevel = this.root.getLevel();
        function createLine(node) {
            if (!node.isExpand) {
                return;
            }
            var children = node.getChildren();
            var pos = node.getPosition();
            var box = node.getBox();
            box.height = box.height + lineWidth;
            var level = node.getLevel();
            children.length && children.forEach(function (child) {
                var direct = child.direct;
                var childPos = child.getPosition();
                var childBox = Object.assign({}, child.getBox());
                childBox.height = childBox.height + lineWidth;
                let _stroke = node.stroke ? node.stroke : (child.stroke ? child.stroke : randomColor());
                if (!child.stroke) {
                    child.stroke = _stroke;
                }
                child._barDom.style.backgroundColor = _stroke;
                child._barDom.style.borderColor = _stroke;
                if (level == rootLevel) {
                    var from = {
                        x: pos.x + box.width / 2,
                        y: pos.y + box.height / 2
                    };
                }
                else if (level == 1 + rootLevel) {
                    if (direct == 'right') {
                        from = {
                            x: pos.x + box.width,
                            y: pos.y + box.height / 2
                        };
                    }
                    else {
                        from = {
                            x: pos.x,
                            y: pos.y + box.height / 2
                        };
                    }
                }
                else {
                    if (direct == 'right') {
                        from = {
                            x: pos.x + box.width,
                            y: pos.y + box.height
                        };
                    }
                    else {
                        from = {
                            x: pos.x,
                            y: pos.y + box.height
                        };
                    }
                }
                if (level == rootLevel) {
                    if (direct == 'right') {
                        var to = {
                            x: childPos.x,
                            y: childBox.height / 2 + childPos.y
                        };
                    }
                    else {
                        to = {
                            x: childPos.x + childBox.width,
                            y: childBox.height / 2 + childPos.y
                        };
                    }
                }
                else {
                    if (direct == 'right') {
                        to = {
                            x: childPos.x,
                            y: childBox.height + childPos.y
                        };
                    }
                    else {
                        to = {
                            x: childPos.x + childBox.width,
                            y: childBox.height + childPos.y
                        };
                    }
                }
                if (lineWidth % 2 == 1) {
                    var x1 = parseInt(from.x + '') - 0.5;
                    var x2 = parseInt(to.x + '') - 0.5;
                    var y1 = parseInt(from.y + '') - 0.5;
                    var y2 = parseInt(to.y + '') - 0.5;
                }
                else {
                    var x1 = parseInt(from.x + '');
                    var y1 = parseInt(from.y + '');
                    var x2 = parseInt(to.x + '');
                    var y2 = parseInt(to.y + '');
                }
                if (level == rootLevel) {
                    var line1 = me.svgDom.path().stroke({
                        color: _stroke,
                        width: lineWidth + 1,
                        linecap: 'round',
                        linejoin: 'round'
                    }).fill('none');
                }
                else {
                    var line1 = me.svgDom.path().stroke({
                        color: _stroke,
                        width: lineWidth,
                        linecap: 'round',
                        linejoin: 'round'
                    }).fill('none');
                }
                if (lineWidth % 2 == 1) {
                    var x11 = parseInt(childPos.x + '') - 0.5;
                    var x22 = parseInt(childPos.x + childBox.width + '') - 0.5;
                    var y11 = y2;
                    var y22 = y2;
                }
                else {
                    var x11 = parseInt(childPos.x + '');
                    var y11 = parseInt(childBox.height + childPos.y + '');
                    var x22 = parseInt(childPos.x + childBox.width + '');
                    var y22 = parseInt(childBox.height + childPos.y + '');
                }
                if (level == rootLevel) {
                    var cpx1 = parseInt(from.x + '') + (to.x - from.x) / 9;
                    var cpy1 = parseInt(from.y + '') + (to.y - from.y) / 9 * 8;
                    var cpx2 = parseInt(from.x + (to.x - from.x) / 9 * 8 + '');
                    var cpy2 = parseInt(to.y + '');
                    var pathStr = `M${x1} ${y1}  C ${cpx1} ${cpy1}, ${cpx2} ${cpy2}, ${x2} ${y2}`;
                    line1.plot(pathStr);
                }
                else {
                    me.svgDom.line(x11, y11, x22, y22).stroke({
                        color: _stroke,
                        width: lineWidth,
                        linecap: 'miter',
                        linejoin: 'miter'
                    }).fill('none');
                    //var c = parseInt((to.y - from.y) / 6+'');
                    var cpx11 = {
                        x: from.x + dis / 2,
                        y: from.y
                    };
                    var cpx12 = {
                        x: from.x + dis / 2,
                        y: to.y
                    };
                    if (direct == 'left') {
                        cpx11.x = from.x - dis / 2;
                        cpx12.x = from.x - dis / 2;
                    }
                    cpx11.x = parseInt(cpx11.x + '');
                    cpx11.y = parseInt(cpx11.y + '');
                    cpx12.x = parseInt(cpx12.x + '');
                    cpx12.y = parseInt(cpx12.y + '');
                    var path = `M${x1} ${y1}  C ${cpx11.x} ${cpx11.y}, ${cpx12.x} ${cpx12.y}, ${x2} ${y2}`;
                    line1.plot(path);
                }
                createLine(child);
            });
        }
        //Set Node link Color
        this.root.children.forEach((c, i) => {
            c.stroke = this.colors[i] || randomColor();
        });
        createLine(root);
    }
}

/*!
* svg.js - A lightweight library for manipulating and animating SVG.
* @version 2.7.1
* https://svgdotjs.github.io/
*
* @copyright Wout Fierens <wout@mick-wout.com>
* @license MIT
*
* BUILT: Fri Nov 30 2018 10:01:55 GMT+0100 (GMT+01:00)
*/

var svg = createCommonjsModule(function (module, exports) {
(function(root, factory) {
  /* istanbul ignore next */
  {
    module.exports = root.document ? factory(root, root.document) : function(w){ return factory(w, w.document) };
  }
}(typeof window !== "undefined" ? window : commonjsGlobal, function(window, document) {

// Find global reference - uses 'this' by default when available,
// falls back to 'window' otherwise (for bundlers like Webpack)
var globalRef = (typeof this !== "undefined") ? this : window;

// The main wrapping element
var SVG = globalRef.SVG = function(element) {
  if (SVG.supported) {
    element = new SVG.Doc(element);

    if(!SVG.parser.draw)
      SVG.prepare();

    return element
  }
};

// Default namespaces
SVG.ns    = 'http://www.w3.org/2000/svg';
SVG.xmlns = 'http://www.w3.org/2000/xmlns/';
SVG.xlink = 'http://www.w3.org/1999/xlink';
SVG.svgjs = 'http://svgjs.com/svgjs';

// Svg support test
SVG.supported = (function() {
  return !! document.createElementNS &&
         !! document.createElementNS(SVG.ns,'svg').createSVGRect
})();

// Don't bother to continue if SVG is not supported
if (!SVG.supported) return false

// Element id sequence
SVG.did  = 1000;

// Get next named element id
SVG.eid = function(name) {
  return 'Svgjs' + capitalize(name) + (SVG.did++)
};

// Method for element creation
SVG.create = function(name) {
  // create element
  var element = document.createElementNS(this.ns, name);

  // apply unique id
  element.setAttribute('id', this.eid(name));

  return element
};

// Method for extending objects
SVG.extend = function() {
  var modules, methods, key, i;

  // Get list of modules
  modules = [].slice.call(arguments);

  // Get object with extensions
  methods = modules.pop();

  for (i = modules.length - 1; i >= 0; i--)
    if (modules[i])
      for (key in methods)
        modules[i].prototype[key] = methods[key];

  // Make sure SVG.Set inherits any newly added methods
  if (SVG.Set && SVG.Set.inherit)
    SVG.Set.inherit();
};

// Invent new element
SVG.invent = function(config) {
  // Create element initializer
  var initializer = typeof config.create == 'function' ?
    config.create :
    function() {
      this.constructor.call(this, SVG.create(config.create));
    };

  // Inherit prototype
  if (config.inherit)
    initializer.prototype = new config.inherit;

  // Extend with methods
  if (config.extend)
    SVG.extend(initializer, config.extend);

  // Attach construct method to parent
  if (config.construct)
    SVG.extend(config.parent || SVG.Container, config.construct);

  return initializer
};

// Adopt existing svg elements
SVG.adopt = function(node) {
  // check for presence of node
  if (!node) return null

  // make sure a node isn't already adopted
  if (node.instance) return node.instance

  // initialize variables
  var element;

  // adopt with element-specific settings
  if (node.nodeName == 'svg')
    element = node.parentNode instanceof window.SVGElement ? new SVG.Nested : new SVG.Doc;
  else if (node.nodeName == 'linearGradient')
    element = new SVG.Gradient('linear');
  else if (node.nodeName == 'radialGradient')
    element = new SVG.Gradient('radial');
  else if (SVG[capitalize(node.nodeName)])
    element = new SVG[capitalize(node.nodeName)];
  else
    element = new SVG.Element(node);

  // ensure references
  element.type  = node.nodeName;
  element.node  = node;
  node.instance = element;

  // SVG.Class specific preparations
  if (element instanceof SVG.Doc)
    element.namespace().defs();

  // pull svgjs data from the dom (getAttributeNS doesn't work in html5)
  element.setData(JSON.parse(node.getAttribute('svgjs:data')) || {});

  return element
};

// Initialize parsing element
SVG.prepare = function() {
  // Select document body and create invisible svg element
  var body = document.getElementsByTagName('body')[0]
    , draw = (body ? new SVG.Doc(body) : SVG.adopt(document.documentElement).nested()).size(2, 0);

  // Create parser object
  SVG.parser = {
    body: body || document.documentElement
  , draw: draw.style('opacity:0;position:absolute;left:-100%;top:-100%;overflow:hidden').attr('focusable', 'false').node
  , poly: draw.polyline().node
  , path: draw.path().node
  , native: SVG.create('svg')
  };
};

SVG.parser = {
  native: SVG.create('svg')
};

document.addEventListener('DOMContentLoaded', function() {
  if(!SVG.parser.draw)
    SVG.prepare();
}, false);

// Storage for regular expressions
SVG.regex = {
  // Parse unit value
  numberAndUnit:    /^([+-]?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?)([a-z%]*)$/i

  // Parse hex value
, hex:              /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i

  // Parse rgb value
, rgb:              /rgb\((\d+),(\d+),(\d+)\)/

  // Parse reference id
, reference:        /#([a-z0-9\-_]+)/i

  // splits a transformation chain
, transforms:       /\)\s*,?\s*/

  // Whitespace
, whitespace:       /\s/g

  // Test hex value
, isHex:            /^#[a-f0-9]{3,6}$/i

  // Test rgb value
, isRgb:            /^rgb\(/

  // Test css declaration
, isCss:            /[^:]+:[^;]+;?/

  // Test for blank string
, isBlank:          /^(\s+)?$/

  // Test for numeric string
, isNumber:         /^[+-]?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i

  // Test for percent value
, isPercent:        /^-?[\d\.]+%$/

  // Test for image url
, isImage:          /\.(jpg|jpeg|png|gif|svg)(\?[^=]+.*)?/i

  // split at whitespace and comma
, delimiter:        /[\s,]+/

  // The following regex are used to parse the d attribute of a path

  // Matches all hyphens which are not after an exponent
, hyphen:           /([^e])\-/gi

  // Replaces and tests for all path letters
, pathLetters:      /[MLHVCSQTAZ]/gi

  // yes we need this one, too
, isPathLetter:     /[MLHVCSQTAZ]/i

  // matches 0.154.23.45
, numbersWithDots:  /((\d?\.\d+(?:e[+-]?\d+)?)((?:\.\d+(?:e[+-]?\d+)?)+))+/gi

  // matches .
, dots:             /\./g
};

SVG.utils = {
  // Map function
  map: function(array, block) {
    var i
      , il = array.length
      , result = [];

    for (i = 0; i < il; i++)
      result.push(block(array[i]));

    return result
  }

  // Filter function
, filter: function(array, block) {
    var i
      , il = array.length
      , result = [];

    for (i = 0; i < il; i++)
      if (block(array[i]))
        result.push(array[i]);

    return result
  }

  // Degrees to radians
, radians: function(d) {
    return d % 360 * Math.PI / 180
  }

  // Radians to degrees
, degrees: function(r) {
    return r * 180 / Math.PI % 360
  }

, filterSVGElements: function(nodes) {
    return this.filter( nodes, function(el) { return el instanceof window.SVGElement })
  }

};

SVG.defaults = {
  // Default attribute values
  attrs: {
    // fill and stroke
    'fill-opacity':     1
  , 'stroke-opacity':   1
  , 'stroke-width':     0
  , 'stroke-linejoin':  'miter'
  , 'stroke-linecap':   'butt'
  , fill:               '#000000'
  , stroke:             '#000000'
  , opacity:            1
    // position
  , x:                  0
  , y:                  0
  , cx:                 0
  , cy:                 0
    // size
  , width:              0
  , height:             0
    // radius
  , r:                  0
  , rx:                 0
  , ry:                 0
    // gradient
  , offset:             0
  , 'stop-opacity':     1
  , 'stop-color':       '#000000'
    // text
  , 'font-size':        16
  , 'font-family':      'Helvetica, Arial, sans-serif'
  , 'text-anchor':      'start'
  }

};
// Module for color convertions
SVG.Color = function(color) {
  var match;

  // initialize defaults
  this.r = 0;
  this.g = 0;
  this.b = 0;

  if(!color) return

  // parse color
  if (typeof color === 'string') {
    if (SVG.regex.isRgb.test(color)) {
      // get rgb values
      match = SVG.regex.rgb.exec(color.replace(SVG.regex.whitespace,''));

      // parse numeric values
      this.r = parseInt(match[1]);
      this.g = parseInt(match[2]);
      this.b = parseInt(match[3]);

    } else if (SVG.regex.isHex.test(color)) {
      // get hex values
      match = SVG.regex.hex.exec(fullHex(color));

      // parse numeric values
      this.r = parseInt(match[1], 16);
      this.g = parseInt(match[2], 16);
      this.b = parseInt(match[3], 16);

    }

  } else if (typeof color === 'object') {
    this.r = color.r;
    this.g = color.g;
    this.b = color.b;

  }

};

SVG.extend(SVG.Color, {
  // Default to hex conversion
  toString: function() {
    return this.toHex()
  }
  // Build hex value
, toHex: function() {
    return '#'
      + compToHex(this.r)
      + compToHex(this.g)
      + compToHex(this.b)
  }
  // Build rgb value
, toRgb: function() {
    return 'rgb(' + [this.r, this.g, this.b].join() + ')'
  }
  // Calculate true brightness
, brightness: function() {
    return (this.r / 255 * 0.30)
         + (this.g / 255 * 0.59)
         + (this.b / 255 * 0.11)
  }
  // Make color morphable
, morph: function(color) {
    this.destination = new SVG.Color(color);

    return this
  }
  // Get morphed color at given position
, at: function(pos) {
    // make sure a destination is defined
    if (!this.destination) return this

    // normalise pos
    pos = pos < 0 ? 0 : pos > 1 ? 1 : pos;

    // generate morphed color
    return new SVG.Color({
      r: ~~(this.r + (this.destination.r - this.r) * pos)
    , g: ~~(this.g + (this.destination.g - this.g) * pos)
    , b: ~~(this.b + (this.destination.b - this.b) * pos)
    })
  }

});

// Testers

// Test if given value is a color string
SVG.Color.test = function(color) {
  color += '';
  return SVG.regex.isHex.test(color)
      || SVG.regex.isRgb.test(color)
};

// Test if given value is a rgb object
SVG.Color.isRgb = function(color) {
  return color && typeof color.r == 'number'
               && typeof color.g == 'number'
               && typeof color.b == 'number'
};

// Test if given value is a color
SVG.Color.isColor = function(color) {
  return SVG.Color.isRgb(color) || SVG.Color.test(color)
};
// Module for array conversion
SVG.Array = function(array, fallback) {
  array = (array || []).valueOf();

  // if array is empty and fallback is provided, use fallback
  if (array.length == 0 && fallback)
    array = fallback.valueOf();

  // parse array
  this.value = this.parse(array);
};

SVG.extend(SVG.Array, {
  // Make array morphable
  morph: function(array) {
    this.destination = this.parse(array);

    // normalize length of arrays
    if (this.value.length != this.destination.length) {
      var lastValue       = this.value[this.value.length - 1]
        , lastDestination = this.destination[this.destination.length - 1];

      while(this.value.length > this.destination.length)
        this.destination.push(lastDestination);
      while(this.value.length < this.destination.length)
        this.value.push(lastValue);
    }

    return this
  }
  // Clean up any duplicate points
, settle: function() {
    // find all unique values
    for (var i = 0, il = this.value.length, seen = []; i < il; i++)
      if (seen.indexOf(this.value[i]) == -1)
        seen.push(this.value[i]);

    // set new value
    return this.value = seen
  }
  // Get morphed array at given position
, at: function(pos) {
    // make sure a destination is defined
    if (!this.destination) return this

    // generate morphed array
    for (var i = 0, il = this.value.length, array = []; i < il; i++)
      array.push(this.value[i] + (this.destination[i] - this.value[i]) * pos);

    return new SVG.Array(array)
  }
  // Convert array to string
, toString: function() {
    return this.value.join(' ')
  }
  // Real value
, valueOf: function() {
    return this.value
  }
  // Parse whitespace separated string
, parse: function(array) {
    array = array.valueOf();

    // if already is an array, no need to parse it
    if (Array.isArray(array)) return array

    return this.split(array)
  }
  // Strip unnecessary whitespace
, split: function(string) {
    return string.trim().split(SVG.regex.delimiter).map(parseFloat)
  }
  // Reverse array
, reverse: function() {
    this.value.reverse();

    return this
  }
, clone: function() {
    var clone = new this.constructor();
    clone.value = array_clone(this.value);
    return clone
  }
});
// Poly points array
SVG.PointArray = function(array, fallback) {
  SVG.Array.call(this, array, fallback || [[0,0]]);
};

// Inherit from SVG.Array
SVG.PointArray.prototype = new SVG.Array;
SVG.PointArray.prototype.constructor = SVG.PointArray;

SVG.extend(SVG.PointArray, {
  // Convert array to string
  toString: function() {
    // convert to a poly point string
    for (var i = 0, il = this.value.length, array = []; i < il; i++)
      array.push(this.value[i].join(','));

    return array.join(' ')
  }
  // Convert array to line object
, toLine: function() {
    return {
      x1: this.value[0][0]
    , y1: this.value[0][1]
    , x2: this.value[1][0]
    , y2: this.value[1][1]
    }
  }
  // Get morphed array at given position
, at: function(pos) {
    // make sure a destination is defined
    if (!this.destination) return this

    // generate morphed point string
    for (var i = 0, il = this.value.length, array = []; i < il; i++)
      array.push([
        this.value[i][0] + (this.destination[i][0] - this.value[i][0]) * pos
      , this.value[i][1] + (this.destination[i][1] - this.value[i][1]) * pos
      ]);

    return new SVG.PointArray(array)
  }
  // Parse point string and flat array
, parse: function(array) {
    var points = [];

    array = array.valueOf();

    // if it is an array
    if (Array.isArray(array)) {
      // and it is not flat, there is no need to parse it
      if(Array.isArray(array[0])) {
        // make sure to use a clone
        return array.map(function (el) { return el.slice() })
      } else if (array[0].x != null){
        // allow point objects to be passed
        return array.map(function (el) { return [el.x, el.y] })
      }
    } else { // Else, it is considered as a string
      // parse points
      array = array.trim().split(SVG.regex.delimiter).map(parseFloat);
    }

    // validate points - https://svgwg.org/svg2-draft/shapes.html#DataTypePoints
    // Odd number of coordinates is an error. In such cases, drop the last odd coordinate.
    if (array.length % 2 !== 0) array.pop();

    // wrap points in two-tuples and parse points as floats
    for(var i = 0, len = array.length; i < len; i = i + 2)
      points.push([ array[i], array[i+1] ]);

    return points
  }
  // Move point string
, move: function(x, y) {
    var box = this.bbox();

    // get relative offset
    x -= box.x;
    y -= box.y;

    // move every point
    if (!isNaN(x) && !isNaN(y))
      for (var i = this.value.length - 1; i >= 0; i--)
        this.value[i] = [this.value[i][0] + x, this.value[i][1] + y];

    return this
  }
  // Resize poly string
, size: function(width, height) {
    var i, box = this.bbox();

    // recalculate position of all points according to new size
    for (i = this.value.length - 1; i >= 0; i--) {
      if(box.width) this.value[i][0] = ((this.value[i][0] - box.x) * width)  / box.width  + box.x;
      if(box.height) this.value[i][1] = ((this.value[i][1] - box.y) * height) / box.height + box.y;
    }

    return this
  }
  // Get bounding box of points
, bbox: function() {
    SVG.parser.poly.setAttribute('points', this.toString());

    return SVG.parser.poly.getBBox()
  }
});

var pathHandlers = {
  M: function(c, p, p0) {
    p.x = p0.x = c[0];
    p.y = p0.y = c[1];

    return ['M', p.x, p.y]
  },
  L: function(c, p) {
    p.x = c[0];
    p.y = c[1];
    return ['L', c[0], c[1]]
  },
  H: function(c, p) {
    p.x = c[0];
    return ['H', c[0]]
  },
  V: function(c, p) {
    p.y = c[0];
    return ['V', c[0]]
  },
  C: function(c, p) {
    p.x = c[4];
    p.y = c[5];
    return ['C', c[0], c[1], c[2], c[3], c[4], c[5]]
  },
  S: function(c, p) {
    p.x = c[2];
    p.y = c[3];
    return ['S', c[0], c[1], c[2], c[3]]
  },
  Q: function(c, p) {
    p.x = c[2];
    p.y = c[3];
    return ['Q', c[0], c[1], c[2], c[3]]
  },
  T: function(c, p) {
    p.x = c[0];
    p.y = c[1];
    return ['T', c[0], c[1]]
  },
  Z: function(c, p, p0) {
    p.x = p0.x;
    p.y = p0.y;
    return ['Z']
  },
  A: function(c, p) {
    p.x = c[5];
    p.y = c[6];
    return ['A', c[0], c[1], c[2], c[3], c[4], c[5], c[6]]
  }
};

var mlhvqtcsa = 'mlhvqtcsaz'.split('');

for(var i = 0, il = mlhvqtcsa.length; i < il; ++i){
  pathHandlers[mlhvqtcsa[i]] = (function(i){
    return function(c, p, p0) {
      if(i == 'H') c[0] = c[0] + p.x;
      else if(i == 'V') c[0] = c[0] + p.y;
      else if(i == 'A'){
        c[5] = c[5] + p.x,
        c[6] = c[6] + p.y;
      }
      else
        for(var j = 0, jl = c.length; j < jl; ++j) {
          c[j] = c[j] + (j%2 ? p.y : p.x);
        }

      return pathHandlers[i](c, p, p0)
    }
  })(mlhvqtcsa[i].toUpperCase());
}

// Path points array
SVG.PathArray = function(array, fallback) {
  SVG.Array.call(this, array, fallback || [['M', 0, 0]]);
};

// Inherit from SVG.Array
SVG.PathArray.prototype = new SVG.Array;
SVG.PathArray.prototype.constructor = SVG.PathArray;

SVG.extend(SVG.PathArray, {
  // Convert array to string
  toString: function() {
    return arrayToString(this.value)
  }
  // Move path string
, move: function(x, y) {
    // get bounding box of current situation
    var box = this.bbox();

    // get relative offset
    x -= box.x;
    y -= box.y;

    if (!isNaN(x) && !isNaN(y)) {
      // move every point
      for (var l, i = this.value.length - 1; i >= 0; i--) {
        l = this.value[i][0];

        if (l == 'M' || l == 'L' || l == 'T')  {
          this.value[i][1] += x;
          this.value[i][2] += y;

        } else if (l == 'H')  {
          this.value[i][1] += x;

        } else if (l == 'V')  {
          this.value[i][1] += y;

        } else if (l == 'C' || l == 'S' || l == 'Q')  {
          this.value[i][1] += x;
          this.value[i][2] += y;
          this.value[i][3] += x;
          this.value[i][4] += y;

          if (l == 'C')  {
            this.value[i][5] += x;
            this.value[i][6] += y;
          }

        } else if (l == 'A')  {
          this.value[i][6] += x;
          this.value[i][7] += y;
        }

      }
    }

    return this
  }
  // Resize path string
, size: function(width, height) {
    // get bounding box of current situation
    var i, l, box = this.bbox();

    // recalculate position of all points according to new size
    for (i = this.value.length - 1; i >= 0; i--) {
      l = this.value[i][0];

      if (l == 'M' || l == 'L' || l == 'T')  {
        this.value[i][1] = ((this.value[i][1] - box.x) * width)  / box.width  + box.x;
        this.value[i][2] = ((this.value[i][2] - box.y) * height) / box.height + box.y;

      } else if (l == 'H')  {
        this.value[i][1] = ((this.value[i][1] - box.x) * width)  / box.width  + box.x;

      } else if (l == 'V')  {
        this.value[i][1] = ((this.value[i][1] - box.y) * height) / box.height + box.y;

      } else if (l == 'C' || l == 'S' || l == 'Q')  {
        this.value[i][1] = ((this.value[i][1] - box.x) * width)  / box.width  + box.x;
        this.value[i][2] = ((this.value[i][2] - box.y) * height) / box.height + box.y;
        this.value[i][3] = ((this.value[i][3] - box.x) * width)  / box.width  + box.x;
        this.value[i][4] = ((this.value[i][4] - box.y) * height) / box.height + box.y;

        if (l == 'C')  {
          this.value[i][5] = ((this.value[i][5] - box.x) * width)  / box.width  + box.x;
          this.value[i][6] = ((this.value[i][6] - box.y) * height) / box.height + box.y;
        }

      } else if (l == 'A')  {
        // resize radii
        this.value[i][1] = (this.value[i][1] * width)  / box.width;
        this.value[i][2] = (this.value[i][2] * height) / box.height;

        // move position values
        this.value[i][6] = ((this.value[i][6] - box.x) * width)  / box.width  + box.x;
        this.value[i][7] = ((this.value[i][7] - box.y) * height) / box.height + box.y;
      }

    }

    return this
  }
  // Test if the passed path array use the same path data commands as this path array
, equalCommands: function(pathArray) {
    var i, il, equalCommands;

    pathArray = new SVG.PathArray(pathArray);

    equalCommands = this.value.length === pathArray.value.length;
    for(i = 0, il = this.value.length; equalCommands && i < il; i++) {
      equalCommands = this.value[i][0] === pathArray.value[i][0];
    }

    return equalCommands
  }
  // Make path array morphable
, morph: function(pathArray) {
    pathArray = new SVG.PathArray(pathArray);

    if(this.equalCommands(pathArray)) {
      this.destination = pathArray;
    } else {
      this.destination = null;
    }

    return this
  }
  // Get morphed path array at given position
, at: function(pos) {
    // make sure a destination is defined
    if (!this.destination) return this

    var sourceArray = this.value
      , destinationArray = this.destination.value
      , array = [], pathArray = new SVG.PathArray()
      , i, il, j, jl;

    // Animate has specified in the SVG spec
    // See: https://www.w3.org/TR/SVG11/paths.html#PathElement
    for (i = 0, il = sourceArray.length; i < il; i++) {
      array[i] = [sourceArray[i][0]];
      for(j = 1, jl = sourceArray[i].length; j < jl; j++) {
        array[i][j] = sourceArray[i][j] + (destinationArray[i][j] - sourceArray[i][j]) * pos;
      }
      // For the two flags of the elliptical arc command, the SVG spec say:
      // Flags and booleans are interpolated as fractions between zero and one, with any non-zero value considered to be a value of one/true
      // Elliptical arc command as an array followed by corresponding indexes:
      // ['A', rx, ry, x-axis-rotation, large-arc-flag, sweep-flag, x, y]
      //   0    1   2        3                 4             5      6  7
      if(array[i][0] === 'A') {
        array[i][4] = +(array[i][4] != 0);
        array[i][5] = +(array[i][5] != 0);
      }
    }

    // Directly modify the value of a path array, this is done this way for performance
    pathArray.value = array;
    return pathArray
  }
  // Absolutize and parse path to array
, parse: function(array) {
    // if it's already a patharray, no need to parse it
    if (array instanceof SVG.PathArray) return array.valueOf()

    // prepare for parsing
    var s, arr
      , paramCnt = { 'M':2, 'L':2, 'H':1, 'V':1, 'C':6, 'S':4, 'Q':4, 'T':2, 'A':7, 'Z':0 };

    if(typeof array == 'string'){

      array = array
        .replace(SVG.regex.numbersWithDots, pathRegReplace) // convert 45.123.123 to 45.123 .123
        .replace(SVG.regex.pathLetters, ' $& ') // put some room between letters and numbers
        .replace(SVG.regex.hyphen, '$1 -')      // add space before hyphen
        .trim()                                 // trim
        .split(SVG.regex.delimiter);   // split into array

    }else {
      array = array.reduce(function(prev, curr){
        return [].concat.call(prev, curr)
      }, []);
    }

    // array now is an array containing all parts of a path e.g. ['M', '0', '0', 'L', '30', '30' ...]
    var arr = []
      , p = new SVG.Point()
      , p0 = new SVG.Point()
      , index = 0
      , len = array.length;

    do{
      // Test if we have a path letter
      if(SVG.regex.isPathLetter.test(array[index])){
        s = array[index];
        ++index;
      // If last letter was a move command and we got no new, it defaults to [L]ine
      }else if(s == 'M'){
        s = 'L';
      }else if(s == 'm'){
        s = 'l';
      }

      arr.push(pathHandlers[s].call(null,
          array.slice(index, (index = index + paramCnt[s.toUpperCase()])).map(parseFloat),
          p, p0
        )
      );

    }while(len > index)

    return arr

  }
  // Get bounding box of path
, bbox: function() {
    SVG.parser.path.setAttribute('d', this.toString());

    return SVG.parser.path.getBBox()
  }

});

// Module for unit convertions
SVG.Number = SVG.invent({
  // Initialize
  create: function(value, unit) {
    // initialize defaults
    this.value = 0;
    this.unit  = unit || '';

    // parse value
    if (typeof value === 'number') {
      // ensure a valid numeric value
      this.value = isNaN(value) ? 0 : !isFinite(value) ? (value < 0 ? -3.4e+38 : +3.4e+38) : value;

    } else if (typeof value === 'string') {
      unit = value.match(SVG.regex.numberAndUnit);

      if (unit) {
        // make value numeric
        this.value = parseFloat(unit[1]);

        // normalize
        if (unit[5] == '%')
          this.value /= 100;
        else if (unit[5] == 's')
          this.value *= 1000;

        // store unit
        this.unit = unit[5];
      }

    } else {
      if (value instanceof SVG.Number) {
        this.value = value.valueOf();
        this.unit  = value.unit;
      }
    }

  }
  // Add methods
, extend: {
    // Stringalize
    toString: function() {
      return (
        this.unit == '%' ?
          ~~(this.value * 1e8) / 1e6:
        this.unit == 's' ?
          this.value / 1e3 :
          this.value
      ) + this.unit
    }
  , toJSON: function() {
      return this.toString()
    }
  , // Convert to primitive
    valueOf: function() {
      return this.value
    }
    // Add number
  , plus: function(number) {
      number = new SVG.Number(number);
      return new SVG.Number(this + number, this.unit || number.unit)
    }
    // Subtract number
  , minus: function(number) {
      number = new SVG.Number(number);
      return new SVG.Number(this - number, this.unit || number.unit)
    }
    // Multiply number
  , times: function(number) {
      number = new SVG.Number(number);
      return new SVG.Number(this * number, this.unit || number.unit)
    }
    // Divide number
  , divide: function(number) {
      number = new SVG.Number(number);
      return new SVG.Number(this / number, this.unit || number.unit)
    }
    // Convert to different unit
  , to: function(unit) {
      var number = new SVG.Number(this);

      if (typeof unit === 'string')
        number.unit = unit;

      return number
    }
    // Make number morphable
  , morph: function(number) {
      this.destination = new SVG.Number(number);

      if(number.relative) {
        this.destination.value += this.value;
      }

      return this
    }
    // Get morphed number at given position
  , at: function(pos) {
      // Make sure a destination is defined
      if (!this.destination) return this

      // Generate new morphed number
      return new SVG.Number(this.destination)
          .minus(this)
          .times(pos)
          .plus(this)
    }

  }
});


SVG.Element = SVG.invent({
  // Initialize node
  create: function(node) {
    // make stroke value accessible dynamically
    this._stroke = SVG.defaults.attrs.stroke;
    this._event = null;
    this._events = {};

    // initialize data object
    this.dom = {};

    // create circular reference
    if (this.node = node) {
      this.type = node.nodeName;
      this.node.instance = this;
      this._events = node._events || {};

      // store current attribute value
      this._stroke = node.getAttribute('stroke') || this._stroke;
    }
  }

  // Add class methods
, extend: {
    // Move over x-axis
    x: function(x) {
      return this.attr('x', x)
    }
    // Move over y-axis
  , y: function(y) {
      return this.attr('y', y)
    }
    // Move by center over x-axis
  , cx: function(x) {
      return x == null ? this.x() + this.width() / 2 : this.x(x - this.width() / 2)
    }
    // Move by center over y-axis
  , cy: function(y) {
      return y == null ? this.y() + this.height() / 2 : this.y(y - this.height() / 2)
    }
    // Move element to given x and y values
  , move: function(x, y) {
      return this.x(x).y(y)
    }
    // Move element by its center
  , center: function(x, y) {
      return this.cx(x).cy(y)
    }
    // Set width of element
  , width: function(width) {
      return this.attr('width', width)
    }
    // Set height of element
  , height: function(height) {
      return this.attr('height', height)
    }
    // Set element size to given width and height
  , size: function(width, height) {
      var p = proportionalSize(this, width, height);

      return this
        .width(new SVG.Number(p.width))
        .height(new SVG.Number(p.height))
    }
    // Clone element
  , clone: function(parent) {
      // write dom data to the dom so the clone can pickup the data
      this.writeDataToDom();

      // clone element and assign new id
      var clone = assignNewId(this.node.cloneNode(true));

      // insert the clone in the given parent or after myself
      if(parent) parent.add(clone);
      else this.after(clone);

      return clone
    }
    // Remove element
  , remove: function() {
      if (this.parent())
        this.parent().removeElement(this);

      return this
    }
    // Replace element
  , replace: function(element) {
      this.after(element).remove();

      return element
    }
    // Add element to given container and return self
  , addTo: function(parent) {
      return parent.put(this)
    }
    // Add element to given container and return container
  , putIn: function(parent) {
      return parent.add(this)
    }
    // Get / set id
  , id: function(id) {
      return this.attr('id', id)
    }
    // Checks whether the given point inside the bounding box of the element
  , inside: function(x, y) {
      var box = this.bbox();

      return x > box.x
          && y > box.y
          && x < box.x + box.width
          && y < box.y + box.height
    }
    // Show element
  , show: function() {
      return this.style('display', '')
    }
    // Hide element
  , hide: function() {
      return this.style('display', 'none')
    }
    // Is element visible?
  , visible: function() {
      return this.style('display') != 'none'
    }
    // Return id on string conversion
  , toString: function() {
      return this.attr('id')
    }
    // Return array of classes on the node
  , classes: function() {
      var attr = this.attr('class');

      return attr == null ? [] : attr.trim().split(SVG.regex.delimiter)
    }
    // Return true if class exists on the node, false otherwise
  , hasClass: function(name) {
      return this.classes().indexOf(name) != -1
    }
    // Add class to the node
  , addClass: function(name) {
      if (!this.hasClass(name)) {
        var array = this.classes();
        array.push(name);
        this.attr('class', array.join(' '));
      }

      return this
    }
    // Remove class from the node
  , removeClass: function(name) {
      if (this.hasClass(name)) {
        this.attr('class', this.classes().filter(function(c) {
          return c != name
        }).join(' '));
      }

      return this
    }
    // Toggle the presence of a class on the node
  , toggleClass: function(name) {
      return this.hasClass(name) ? this.removeClass(name) : this.addClass(name)
    }
    // Get referenced element form attribute value
  , reference: function(attr) {
      return SVG.get(this.attr(attr))
    }
    // Returns the parent element instance
  , parent: function(type) {
      var parent = this;

      // check for parent
      if(!parent.node.parentNode) return null

      // get parent element
      parent = SVG.adopt(parent.node.parentNode);

      if(!type) return parent

      // loop trough ancestors if type is given
      while(parent && parent.node instanceof window.SVGElement){
        if(typeof type === 'string' ? parent.matches(type) : parent instanceof type) return parent
        if(!parent.node.parentNode || parent.node.parentNode.nodeName == '#document' || parent.node.parentNode.nodeName == '#document-fragment') return null // #759, #720
        parent = SVG.adopt(parent.node.parentNode);
      }
    }
    // Get parent document
  , doc: function() {
      return this instanceof SVG.Doc ? this : this.parent(SVG.Doc)
    }
    // return array of all ancestors of given type up to the root svg
  , parents: function(type) {
      var parents = [], parent = this;

      do{
        parent = parent.parent(type);
        if(!parent || !parent.node) break

        parents.push(parent);
      } while(parent.parent)

      return parents
    }
    // matches the element vs a css selector
  , matches: function(selector){
      return matches(this.node, selector)
    }
    // Returns the svg node to call native svg methods on it
  , native: function() {
      return this.node
    }
    // Import raw svg
  , svg: function(svg) {
      // create temporary holder
      var well = document.createElement('svg');

      // act as a setter if svg is given
      if (svg && this instanceof SVG.Parent) {
        // dump raw svg
        well.innerHTML = '<svg>' + svg.replace(/\n/, '').replace(/<([\w:-]+)([^<]+?)\/>/g, '<$1$2></$1>') + '</svg>';

        // transplant nodes
        for (var i = 0, il = well.firstChild.childNodes.length; i < il; i++)
          this.node.appendChild(well.firstChild.firstChild);

      // otherwise act as a getter
      } else {
        // create a wrapping svg element in case of partial content
        well.appendChild(svg = document.createElement('svg'));

        // write svgjs data to the dom
        this.writeDataToDom();

        // insert a copy of this node
        svg.appendChild(this.node.cloneNode(true));

        // return target element
        return well.innerHTML.replace(/^<svg>/, '').replace(/<\/svg>$/, '')
      }

      return this
    }
  // write svgjs data to the dom
  , writeDataToDom: function() {

      // dump variables recursively
      if(this.each || this.lines){
        var fn = this.each ? this : this.lines();
        fn.each(function(){
          this.writeDataToDom();
        });
      }

      // remove previously set data
      this.node.removeAttribute('svgjs:data');

      if(Object.keys(this.dom).length)
        this.node.setAttribute('svgjs:data', JSON.stringify(this.dom)); // see #428

      return this
    }
  // set given data to the elements data property
  , setData: function(o){
      this.dom = o;
      return this
    }
  , is: function(obj){
      return is(this, obj)
    }
  }
});

SVG.easing = {
  '-': function(pos){return pos}
, '<>':function(pos){return -Math.cos(pos * Math.PI) / 2 + 0.5}
, '>': function(pos){return  Math.sin(pos * Math.PI / 2)}
, '<': function(pos){return -Math.cos(pos * Math.PI / 2) + 1}
};

SVG.morph = function(pos){
  return function(from, to) {
    return new SVG.MorphObj(from, to).at(pos)
  }
};

SVG.Situation = SVG.invent({

  create: function(o){
    this.init = false;
    this.reversed = false;
    this.reversing = false;

    this.duration = new SVG.Number(o.duration).valueOf();
    this.delay = new SVG.Number(o.delay).valueOf();

    this.start = +new Date() + this.delay;
    this.finish = this.start + this.duration;
    this.ease = o.ease;

    // this.loop is incremented from 0 to this.loops
    // it is also incremented when in an infinite loop (when this.loops is true)
    this.loop = 0;
    this.loops = false;

    this.animations = {
      // functionToCall: [list of morphable objects]
      // e.g. move: [SVG.Number, SVG.Number]
    };

    this.attrs = {
      // holds all attributes which are not represented from a function svg.js provides
      // e.g. someAttr: SVG.Number
    };

    this.styles = {
      // holds all styles which should be animated
      // e.g. fill-color: SVG.Color
    };

    this.transforms = [
      // holds all transformations as transformation objects
      // e.g. [SVG.Rotate, SVG.Translate, SVG.Matrix]
    ];

    this.once = {
      // functions to fire at a specific position
      // e.g. "0.5": function foo(){}
    };

  }

});


SVG.FX = SVG.invent({

  create: function(element) {
    this._target = element;
    this.situations = [];
    this.active = false;
    this.situation = null;
    this.paused = false;
    this.lastPos = 0;
    this.pos = 0;
    // The absolute position of an animation is its position in the context of its complete duration (including delay and loops)
    // When performing a delay, absPos is below 0 and when performing a loop, its value is above 1
    this.absPos = 0;
    this._speed = 1;
  }

, extend: {

    /**
     * sets or returns the target of this animation
     * @param o object || number In case of Object it holds all parameters. In case of number its the duration of the animation
     * @param ease function || string Function which should be used for easing or easing keyword
     * @param delay Number indicating the delay before the animation starts
     * @return target || this
     */
    animate: function(o, ease, delay){

      if(typeof o == 'object'){
        ease = o.ease;
        delay = o.delay;
        o = o.duration;
      }

      var situation = new SVG.Situation({
        duration: o || 1000,
        delay: delay || 0,
        ease: SVG.easing[ease || '-'] || ease
      });

      this.queue(situation);

      return this
    }

    /**
     * sets a delay before the next element of the queue is called
     * @param delay Duration of delay in milliseconds
     * @return this.target()
     */
  , delay: function(delay){
      // The delay is performed by an empty situation with its duration
      // attribute set to the duration of the delay
      var situation = new SVG.Situation({
        duration: delay,
        delay: 0,
        ease: SVG.easing['-']
      });

      return this.queue(situation)
    }

    /**
     * sets or returns the target of this animation
     * @param null || target SVG.Element which should be set as new target
     * @return target || this
     */
  , target: function(target){
      if(target && target instanceof SVG.Element){
        this._target = target;
        return this
      }

      return this._target
    }

    // returns the absolute position at a given time
  , timeToAbsPos: function(timestamp){
      return (timestamp - this.situation.start) / (this.situation.duration/this._speed)
    }

    // returns the timestamp from a given absolute positon
  , absPosToTime: function(absPos){
      return this.situation.duration/this._speed * absPos + this.situation.start
    }

    // starts the animationloop
  , startAnimFrame: function(){
      this.stopAnimFrame();
      this.animationFrame = window.requestAnimationFrame(function(){ this.step(); }.bind(this));
    }

    // cancels the animationframe
  , stopAnimFrame: function(){
      window.cancelAnimationFrame(this.animationFrame);
    }

    // kicks off the animation - only does something when the queue is currently not active and at least one situation is set
  , start: function(){
      // dont start if already started
      if(!this.active && this.situation){
        this.active = true;
        this.startCurrent();
      }

      return this
    }

    // start the current situation
  , startCurrent: function(){
      this.situation.start = +new Date + this.situation.delay/this._speed;
      this.situation.finish = this.situation.start + this.situation.duration/this._speed;
      return this.initAnimations().step()
    }

    /**
     * adds a function / Situation to the animation queue
     * @param fn function / situation to add
     * @return this
     */
  , queue: function(fn){
      if(typeof fn == 'function' || fn instanceof SVG.Situation)
        this.situations.push(fn);

      if(!this.situation) this.situation = this.situations.shift();

      return this
    }

    /**
     * pulls next element from the queue and execute it
     * @return this
     */
  , dequeue: function(){
      // stop current animation
      this.stop();

      // get next animation from queue
      this.situation = this.situations.shift();

      if(this.situation){
        if(this.situation instanceof SVG.Situation) {
          this.start();
        } else {
          // If it is not a SVG.Situation, then it is a function, we execute it
          this.situation.call(this);
        }
      }

      return this
    }

    // updates all animations to the current state of the element
    // this is important when one property could be changed from another property
  , initAnimations: function() {
      var i, j, source;
      var s = this.situation;

      if(s.init) return this

      for(i in s.animations){
        source = this.target()[i]();

        if(!Array.isArray(source)) {
          source = [source];
        }

        if(!Array.isArray(s.animations[i])) {
          s.animations[i] = [s.animations[i]];
        }

        //if(s.animations[i].length > source.length) {
        //  source.concat = source.concat(s.animations[i].slice(source.length, s.animations[i].length))
        //}

        for(j = source.length; j--;) {
          // The condition is because some methods return a normal number instead
          // of a SVG.Number
          if(s.animations[i][j] instanceof SVG.Number)
            source[j] = new SVG.Number(source[j]);

          s.animations[i][j] = source[j].morph(s.animations[i][j]);
        }
      }

      for(i in s.attrs){
        s.attrs[i] = new SVG.MorphObj(this.target().attr(i), s.attrs[i]);
      }

      for(i in s.styles){
        s.styles[i] = new SVG.MorphObj(this.target().style(i), s.styles[i]);
      }

      s.initialTransformation = this.target().matrixify();

      s.init = true;
      return this
    }
  , clearQueue: function(){
      this.situations = [];
      return this
    }
  , clearCurrent: function(){
      this.situation = null;
      return this
    }
    /** stops the animation immediately
     * @param jumpToEnd A Boolean indicating whether to complete the current animation immediately.
     * @param clearQueue A Boolean indicating whether to remove queued animation as well.
     * @return this
     */
  , stop: function(jumpToEnd, clearQueue){
      var active = this.active;
      this.active = false;

      if(clearQueue){
        this.clearQueue();
      }

      if(jumpToEnd && this.situation){
        // initialize the situation if it was not
        !active && this.startCurrent();
        this.atEnd();
      }

      this.stopAnimFrame();

      return this.clearCurrent()
    }

    /** resets the element to the state where the current element has started
     * @return this
     */
  , reset: function(){
      if(this.situation){
        var temp = this.situation;
        this.stop();
        this.situation = temp;
        this.atStart();
      }
      return this
    }

    // Stop the currently-running animation, remove all queued animations, and complete all animations for the element.
  , finish: function(){

      this.stop(true, false);

      while(this.dequeue().situation && this.stop(true, false));

      this.clearQueue().clearCurrent();

      return this
    }

    // set the internal animation pointer at the start position, before any loops, and updates the visualisation
  , atStart: function() {
      return this.at(0, true)
    }

    // set the internal animation pointer at the end position, after all the loops, and updates the visualisation
  , atEnd: function() {
      if (this.situation.loops === true) {
        // If in a infinite loop, we end the current iteration
        this.situation.loops = this.situation.loop + 1;
      }

      if(typeof this.situation.loops == 'number') {
        // If performing a finite number of loops, we go after all the loops
        return this.at(this.situation.loops, true)
      } else {
        // If no loops, we just go at the end
        return this.at(1, true)
      }
    }

    // set the internal animation pointer to the specified position and updates the visualisation
    // if isAbsPos is true, pos is treated as an absolute position
  , at: function(pos, isAbsPos){
      var durDivSpd = this.situation.duration/this._speed;

      this.absPos = pos;
      // If pos is not an absolute position, we convert it into one
      if (!isAbsPos) {
        if (this.situation.reversed) this.absPos = 1 - this.absPos;
        this.absPos += this.situation.loop;
      }

      this.situation.start = +new Date - this.absPos * durDivSpd;
      this.situation.finish = this.situation.start + durDivSpd;

      return this.step(true)
    }

    /**
     * sets or returns the speed of the animations
     * @param speed null || Number The new speed of the animations
     * @return Number || this
     */
  , speed: function(speed){
      if (speed === 0) return this.pause()

      if (speed) {
        this._speed = speed;
        // We use an absolute position here so that speed can affect the delay before the animation
        return this.at(this.absPos, true)
      } else return this._speed
    }

    // Make loopable
  , loop: function(times, reverse) {
      var c = this.last();

      // store total loops
      c.loops = (times != null) ? times : true;
      c.loop = 0;

      if(reverse) c.reversing = true;
      return this
    }

    // pauses the animation
  , pause: function(){
      this.paused = true;
      this.stopAnimFrame();

      return this
    }

    // unpause the animation
  , play: function(){
      if(!this.paused) return this
      this.paused = false;
      // We use an absolute position here so that the delay before the animation can be paused
      return this.at(this.absPos, true)
    }

    /**
     * toggle or set the direction of the animation
     * true sets direction to backwards while false sets it to forwards
     * @param reversed Boolean indicating whether to reverse the animation or not (default: toggle the reverse status)
     * @return this
     */
  , reverse: function(reversed){
      var c = this.last();

      if(typeof reversed == 'undefined') c.reversed = !c.reversed;
      else c.reversed = reversed;

      return this
    }


    /**
     * returns a float from 0-1 indicating the progress of the current animation
     * @param eased Boolean indicating whether the returned position should be eased or not
     * @return number
     */
  , progress: function(easeIt){
      return easeIt ? this.situation.ease(this.pos) : this.pos
    }

    /**
     * adds a callback function which is called when the current animation is finished
     * @param fn Function which should be executed as callback
     * @return number
     */
  , after: function(fn){
      var c = this.last()
        , wrapper = function wrapper(e){
            if(e.detail.situation == c){
              fn.call(this, c);
              this.off('finished.fx', wrapper); // prevent memory leak
            }
          };

      this.target().on('finished.fx', wrapper);

      return this._callStart()
    }

    // adds a callback which is called whenever one animation step is performed
  , during: function(fn){
      var c = this.last()
        , wrapper = function(e){
            if(e.detail.situation == c){
              fn.call(this, e.detail.pos, SVG.morph(e.detail.pos), e.detail.eased, c);
            }
          };

      // see above
      this.target().off('during.fx', wrapper).on('during.fx', wrapper);

      this.after(function(){
        this.off('during.fx', wrapper);
      });

      return this._callStart()
    }

    // calls after ALL animations in the queue are finished
  , afterAll: function(fn){
      var wrapper = function wrapper(e){
            fn.call(this);
            this.off('allfinished.fx', wrapper);
          };

      // see above
      this.target().off('allfinished.fx', wrapper).on('allfinished.fx', wrapper);

      return this._callStart()
    }

    // calls on every animation step for all animations
  , duringAll: function(fn){
      var wrapper = function(e){
            fn.call(this, e.detail.pos, SVG.morph(e.detail.pos), e.detail.eased, e.detail.situation);
          };

      this.target().off('during.fx', wrapper).on('during.fx', wrapper);

      this.afterAll(function(){
        this.off('during.fx', wrapper);
      });

      return this._callStart()
    }

  , last: function(){
      return this.situations.length ? this.situations[this.situations.length-1] : this.situation
    }

    // adds one property to the animations
  , add: function(method, args, type){
      this.last()[type || 'animations'][method] = args;
      return this._callStart()
    }

    /** perform one step of the animation
     *  @param ignoreTime Boolean indicating whether to ignore time and use position directly or recalculate position based on time
     *  @return this
     */
  , step: function(ignoreTime){

      // convert current time to an absolute position
      if(!ignoreTime) this.absPos = this.timeToAbsPos(+new Date);

      // This part convert an absolute position to a position
      if(this.situation.loops !== false) {
        var absPos, absPosInt, lastLoop;

        // If the absolute position is below 0, we just treat it as if it was 0
        absPos = Math.max(this.absPos, 0);
        absPosInt = Math.floor(absPos);

        if(this.situation.loops === true || absPosInt < this.situation.loops) {
          this.pos = absPos - absPosInt;
          lastLoop = this.situation.loop;
          this.situation.loop = absPosInt;
        } else {
          this.absPos = this.situation.loops;
          this.pos = 1;
          // The -1 here is because we don't want to toggle reversed when all the loops have been completed
          lastLoop = this.situation.loop - 1;
          this.situation.loop = this.situation.loops;
        }

        if(this.situation.reversing) {
          // Toggle reversed if an odd number of loops as occured since the last call of step
          this.situation.reversed = this.situation.reversed != Boolean((this.situation.loop - lastLoop) % 2);
        }

      } else {
        // If there are no loop, the absolute position must not be above 1
        this.absPos = Math.min(this.absPos, 1);
        this.pos = this.absPos;
      }

      // while the absolute position can be below 0, the position must not be below 0
      if(this.pos < 0) this.pos = 0;

      if(this.situation.reversed) this.pos = 1 - this.pos;


      // apply easing
      var eased = this.situation.ease(this.pos);

      // call once-callbacks
      for(var i in this.situation.once){
        if(i > this.lastPos && i <= eased){
          this.situation.once[i].call(this.target(), this.pos, eased);
          delete this.situation.once[i];
        }
      }

      // fire during callback with position, eased position and current situation as parameter
      if(this.active) this.target().fire('during', {pos: this.pos, eased: eased, fx: this, situation: this.situation});

      // the user may call stop or finish in the during callback
      // so make sure that we still have a valid situation
      if(!this.situation){
        return this
      }

      // apply the actual animation to every property
      this.eachAt();

      // do final code when situation is finished
      if((this.pos == 1 && !this.situation.reversed) || (this.situation.reversed && this.pos == 0)){

        // stop animation callback
        this.stopAnimFrame();

        // fire finished callback with current situation as parameter
        this.target().fire('finished', {fx:this, situation: this.situation});

        if(!this.situations.length){
          this.target().fire('allfinished');

          // Recheck the length since the user may call animate in the afterAll callback
          if(!this.situations.length){
            this.target().off('.fx'); // there shouldnt be any binding left, but to make sure...
            this.active = false;
          }
        }

        // start next animation
        if(this.active) this.dequeue();
        else this.clearCurrent();

      }else if(!this.paused && this.active){
        // we continue animating when we are not at the end
        this.startAnimFrame();
      }

      // save last eased position for once callback triggering
      this.lastPos = eased;
      return this

    }

    // calculates the step for every property and calls block with it
  , eachAt: function(){
      var i, len, at, self = this, target = this.target(), s = this.situation;

      // apply animations which can be called trough a method
      for(i in s.animations){

        at = [].concat(s.animations[i]).map(function(el){
          return typeof el !== 'string' && el.at ? el.at(s.ease(self.pos), self.pos) : el
        });

        target[i].apply(target, at);

      }

      // apply animation which has to be applied with attr()
      for(i in s.attrs){

        at = [i].concat(s.attrs[i]).map(function(el){
          return typeof el !== 'string' && el.at ? el.at(s.ease(self.pos), self.pos) : el
        });

        target.attr.apply(target, at);

      }

      // apply animation which has to be applied with style()
      for(i in s.styles){

        at = [i].concat(s.styles[i]).map(function(el){
          return typeof el !== 'string' && el.at ? el.at(s.ease(self.pos), self.pos) : el
        });

        target.style.apply(target, at);

      }

      // animate initialTransformation which has to be chained
      if(s.transforms.length){

        // get initial initialTransformation
        at = s.initialTransformation;
        for(i = 0, len = s.transforms.length; i < len; i++){

          // get next transformation in chain
          var a = s.transforms[i];

          // multiply matrix directly
          if(a instanceof SVG.Matrix){

            if(a.relative){
              at = at.multiply(new SVG.Matrix().morph(a).at(s.ease(this.pos)));
            }else {
              at = at.morph(a).at(s.ease(this.pos));
            }
            continue
          }

          // when transformation is absolute we have to reset the needed transformation first
          if(!a.relative)
            a.undo(at.extract());

          // and reapply it after
          at = at.multiply(a.at(s.ease(this.pos)));

        }

        // set new matrix on element
        target.matrix(at);
      }

      return this

    }


    // adds an once-callback which is called at a specific position and never again
  , once: function(pos, fn, isEased){
      var c = this.last();
      if(!isEased) pos = c.ease(pos);

      c.once[pos] = fn;

      return this
    }

  , _callStart: function() {
      setTimeout(function(){this.start();}.bind(this), 0);
      return this
    }

  }

, parent: SVG.Element

  // Add method to parent elements
, construct: {
    // Get fx module or create a new one, then animate with given duration and ease
    animate: function(o, ease, delay) {
      return (this.fx || (this.fx = new SVG.FX(this))).animate(o, ease, delay)
    }
  , delay: function(delay){
      return (this.fx || (this.fx = new SVG.FX(this))).delay(delay)
    }
  , stop: function(jumpToEnd, clearQueue) {
      if (this.fx)
        this.fx.stop(jumpToEnd, clearQueue);

      return this
    }
  , finish: function() {
      if (this.fx)
        this.fx.finish();

      return this
    }
    // Pause current animation
  , pause: function() {
      if (this.fx)
        this.fx.pause();

      return this
    }
    // Play paused current animation
  , play: function() {
      if (this.fx)
        this.fx.play();

      return this
    }
    // Set/Get the speed of the animations
  , speed: function(speed) {
      if (this.fx)
        if (speed == null)
          return this.fx.speed()
        else
          this.fx.speed(speed);

      return this
    }
  }

});

// MorphObj is used whenever no morphable object is given
SVG.MorphObj = SVG.invent({

  create: function(from, to){
    // prepare color for morphing
    if(SVG.Color.isColor(to)) return new SVG.Color(from).morph(to)
    // check if we have a list of values
    if(SVG.regex.delimiter.test(from)) {
      // prepare path for morphing
      if(SVG.regex.pathLetters.test(from)) return new SVG.PathArray(from).morph(to)
      // prepare value list for morphing
      else return new SVG.Array(from).morph(to)
    }
    // prepare number for morphing
    if(SVG.regex.numberAndUnit.test(to)) return new SVG.Number(from).morph(to)

    // prepare for plain morphing
    this.value = from;
    this.destination = to;
  }

, extend: {
    at: function(pos, real){
      return real < 1 ? this.value : this.destination
    },

    valueOf: function(){
      return this.value
    }
  }

});

SVG.extend(SVG.FX, {
  // Add animatable attributes
  attr: function(a, v, relative) {
    // apply attributes individually
    if (typeof a == 'object') {
      for (var key in a)
        this.attr(key, a[key]);

    } else {
      this.add(a, v, 'attrs');
    }

    return this
  }
  // Add animatable styles
, style: function(s, v) {
    if (typeof s == 'object')
      for (var key in s)
        this.style(key, s[key]);

    else
      this.add(s, v, 'styles');

    return this
  }
  // Animatable x-axis
, x: function(x, relative) {
    if(this.target() instanceof SVG.G){
      this.transform({x:x}, relative);
      return this
    }

    var num = new SVG.Number(x);
    num.relative = relative;
    return this.add('x', num)
  }
  // Animatable y-axis
, y: function(y, relative) {
    if(this.target() instanceof SVG.G){
      this.transform({y:y}, relative);
      return this
    }

    var num = new SVG.Number(y);
    num.relative = relative;
    return this.add('y', num)
  }
  // Animatable center x-axis
, cx: function(x) {
    return this.add('cx', new SVG.Number(x))
  }
  // Animatable center y-axis
, cy: function(y) {
    return this.add('cy', new SVG.Number(y))
  }
  // Add animatable move
, move: function(x, y) {
    return this.x(x).y(y)
  }
  // Add animatable center
, center: function(x, y) {
    return this.cx(x).cy(y)
  }
  // Add animatable size
, size: function(width, height) {
    if (this.target() instanceof SVG.Text) {
      // animate font size for Text elements
      this.attr('font-size', width);

    } else {
      // animate bbox based size for all other elements
      var box;

      if(!width || !height){
        box = this.target().bbox();
      }

      if(!width){
        width = box.width / box.height  * height;
      }

      if(!height){
        height = box.height / box.width  * width;
      }

      this.add('width' , new SVG.Number(width))
          .add('height', new SVG.Number(height));

    }

    return this
  }
  // Add animatable width
, width: function(width) {
    return this.add('width', new SVG.Number(width))
  }
  // Add animatable height
, height: function(height) {
    return this.add('height', new SVG.Number(height))
  }
  // Add animatable plot
, plot: function(a, b, c, d) {
    // Lines can be plotted with 4 arguments
    if(arguments.length == 4) {
      return this.plot([a, b, c, d])
    }

    return this.add('plot', new (this.target().morphArray)(a))
  }
  // Add leading method
, leading: function(value) {
    return this.target().leading ?
      this.add('leading', new SVG.Number(value)) :
      this
  }
  // Add animatable viewbox
, viewbox: function(x, y, width, height) {
    if (this.target() instanceof SVG.Container) {
      this.add('viewbox', new SVG.ViewBox(x, y, width, height));
    }

    return this
  }
, update: function(o) {
    if (this.target() instanceof SVG.Stop) {
      if (typeof o == 'number' || o instanceof SVG.Number) {
        return this.update({
          offset:  arguments[0]
        , color:   arguments[1]
        , opacity: arguments[2]
        })
      }

      if (o.opacity != null) this.attr('stop-opacity', o.opacity);
      if (o.color   != null) this.attr('stop-color', o.color);
      if (o.offset  != null) this.attr('offset', o.offset);
    }

    return this
  }
});

SVG.Box = SVG.invent({
  create: function(x, y, width, height) {
    if (typeof x == 'object' && !(x instanceof SVG.Element)) {
      // chromes getBoundingClientRect has no x and y property
      return SVG.Box.call(this, x.left != null ? x.left : x.x , x.top != null ? x.top : x.y, x.width, x.height)
    } else if (arguments.length == 4) {
      this.x = x;
      this.y = y;
      this.width = width;
      this.height = height;
    }

    // add center, right, bottom...
    fullBox(this);
  }
, extend: {
    // Merge rect box with another, return a new instance
    merge: function(box) {
      var b = new this.constructor();

      // merge boxes
      b.x      = Math.min(this.x, box.x);
      b.y      = Math.min(this.y, box.y);
      b.width  = Math.max(this.x + this.width,  box.x + box.width)  - b.x;
      b.height = Math.max(this.y + this.height, box.y + box.height) - b.y;

      return fullBox(b)
    }

  , transform: function(m) {
      var xMin = Infinity, xMax = -Infinity, yMin = Infinity, yMax = -Infinity, bbox;

      var pts = [
        new SVG.Point(this.x, this.y),
        new SVG.Point(this.x2, this.y),
        new SVG.Point(this.x, this.y2),
        new SVG.Point(this.x2, this.y2)
      ];

      pts.forEach(function(p) {
        p = p.transform(m);
        xMin = Math.min(xMin,p.x);
        xMax = Math.max(xMax,p.x);
        yMin = Math.min(yMin,p.y);
        yMax = Math.max(yMax,p.y);
      });

      bbox = new this.constructor();
      bbox.x = xMin;
      bbox.width = xMax-xMin;
      bbox.y = yMin;
      bbox.height = yMax-yMin;

      fullBox(bbox);

      return bbox
    }
  }
});

SVG.BBox = SVG.invent({
  // Initialize
  create: function(element) {
    SVG.Box.apply(this, [].slice.call(arguments));

    // get values if element is given
    if (element instanceof SVG.Element) {
      var box;

      // yes this is ugly, but Firefox can be a pain when it comes to elements that are not yet rendered
      try {

        if (!document.documentElement.contains){
          // This is IE - it does not support contains() for top-level SVGs
          var topParent = element.node;
          while (topParent.parentNode){
            topParent = topParent.parentNode;
          }
          if (topParent != document) throw new Exception('Element not in the dom')
        } else {
          // the element is NOT in the dom, throw error
          if(!document.documentElement.contains(element.node)) throw new Exception('Element not in the dom')
        }

        // find native bbox
        box = element.node.getBBox();
      } catch(e) {
        if(element instanceof SVG.Shape){
          var clone = element.clone(SVG.parser.draw.instance).show();
          box = clone.node.getBBox();
          clone.remove();
        }else {
          box = {
            x:      element.node.clientLeft
          , y:      element.node.clientTop
          , width:  element.node.clientWidth
          , height: element.node.clientHeight
          };
        }
      }

      SVG.Box.call(this, box);
    }

  }

  // Define ancestor
, inherit: SVG.Box

  // Define Parent
, parent: SVG.Element

  // Constructor
, construct: {
    // Get bounding box
    bbox: function() {
      return new SVG.BBox(this)
    }
  }

});

SVG.BBox.prototype.constructor = SVG.BBox;


SVG.extend(SVG.Element, {
  tbox: function(){
    console.warn('Use of TBox is deprecated and mapped to RBox. Use .rbox() instead.');
    return this.rbox(this.doc())
  }
});

SVG.RBox = SVG.invent({
  // Initialize
  create: function(element) {
    SVG.Box.apply(this, [].slice.call(arguments));

    if (element instanceof SVG.Element) {
      SVG.Box.call(this, element.node.getBoundingClientRect());
    }
  }

, inherit: SVG.Box

  // define Parent
, parent: SVG.Element

, extend: {
    addOffset: function() {
      // offset by window scroll position, because getBoundingClientRect changes when window is scrolled
      this.x += window.pageXOffset;
      this.y += window.pageYOffset;
      return this
    }
  }

  // Constructor
, construct: {
    // Get rect box
    rbox: function(el) {
      if (el) return new SVG.RBox(this).transform(el.screenCTM().inverse())
      return new SVG.RBox(this).addOffset()
    }
  }

});

SVG.RBox.prototype.constructor = SVG.RBox;

SVG.Matrix = SVG.invent({
  // Initialize
  create: function(source) {
    var i, base = arrayToMatrix([1, 0, 0, 1, 0, 0]);

    // ensure source as object
    source = source instanceof SVG.Element ?
      source.matrixify() :
    typeof source === 'string' ?
      arrayToMatrix(source.split(SVG.regex.delimiter).map(parseFloat)) :
    arguments.length == 6 ?
      arrayToMatrix([].slice.call(arguments)) :
    Array.isArray(source) ?
      arrayToMatrix(source) :
    typeof source === 'object' ?
      source : base;

    // merge source
    for (i = abcdef.length - 1; i >= 0; --i)
      this[abcdef[i]] = source[abcdef[i]] != null ?
        source[abcdef[i]] : base[abcdef[i]];
  }

  // Add methods
, extend: {
    // Extract individual transformations
    extract: function() {
      // find delta transform points
      var px    = deltaTransformPoint(this, 0, 1)
        , py    = deltaTransformPoint(this, 1, 0)
        , skewX = 180 / Math.PI * Math.atan2(px.y, px.x) - 90;

      return {
        // translation
        x:        this.e
      , y:        this.f
      , transformedX:(this.e * Math.cos(skewX * Math.PI / 180) + this.f * Math.sin(skewX * Math.PI / 180)) / Math.sqrt(this.a * this.a + this.b * this.b)
      , transformedY:(this.f * Math.cos(skewX * Math.PI / 180) + this.e * Math.sin(-skewX * Math.PI / 180)) / Math.sqrt(this.c * this.c + this.d * this.d)
        // skew
      , skewX:    -skewX
      , skewY:    180 / Math.PI * Math.atan2(py.y, py.x)
        // scale
      , scaleX:   Math.sqrt(this.a * this.a + this.b * this.b)
      , scaleY:   Math.sqrt(this.c * this.c + this.d * this.d)
        // rotation
      , rotation: skewX
      , a: this.a
      , b: this.b
      , c: this.c
      , d: this.d
      , e: this.e
      , f: this.f
      , matrix: new SVG.Matrix(this)
      }
    }
    // Clone matrix
  , clone: function() {
      return new SVG.Matrix(this)
    }
    // Morph one matrix into another
  , morph: function(matrix) {
      // store new destination
      this.destination = new SVG.Matrix(matrix);

      return this
    }
    // Get morphed matrix at a given position
  , at: function(pos) {
      // make sure a destination is defined
      if (!this.destination) return this

      // calculate morphed matrix at a given position
      var matrix = new SVG.Matrix({
        a: this.a + (this.destination.a - this.a) * pos
      , b: this.b + (this.destination.b - this.b) * pos
      , c: this.c + (this.destination.c - this.c) * pos
      , d: this.d + (this.destination.d - this.d) * pos
      , e: this.e + (this.destination.e - this.e) * pos
      , f: this.f + (this.destination.f - this.f) * pos
      });

      return matrix
    }
    // Multiplies by given matrix
  , multiply: function(matrix) {
      return new SVG.Matrix(this.native().multiply(parseMatrix(matrix).native()))
    }
    // Inverses matrix
  , inverse: function() {
      return new SVG.Matrix(this.native().inverse())
    }
    // Translate matrix
  , translate: function(x, y) {
      return new SVG.Matrix(this.native().translate(x || 0, y || 0))
    }
    // Scale matrix
  , scale: function(x, y, cx, cy) {
      // support uniformal scale
      if (arguments.length == 1) {
        y = x;
      } else if (arguments.length == 3) {
        cy = cx;
        cx = y;
        y = x;
      }

      return this.around(cx, cy, new SVG.Matrix(x, 0, 0, y, 0, 0))
    }
    // Rotate matrix
  , rotate: function(r, cx, cy) {
      // convert degrees to radians
      r = SVG.utils.radians(r);

      return this.around(cx, cy, new SVG.Matrix(Math.cos(r), Math.sin(r), -Math.sin(r), Math.cos(r), 0, 0))
    }
    // Flip matrix on x or y, at a given offset
  , flip: function(a, o) {
      return a == 'x' ?
          this.scale(-1, 1, o, 0) :
        a == 'y' ?
          this.scale(1, -1, 0, o) :
          this.scale(-1, -1, a, o != null ? o : a)
    }
    // Skew
  , skew: function(x, y, cx, cy) {
      // support uniformal skew
      if (arguments.length == 1) {
        y = x;
      } else if (arguments.length == 3) {
        cy = cx;
        cx = y;
        y = x;
      }

      // convert degrees to radians
      x = SVG.utils.radians(x);
      y = SVG.utils.radians(y);

      return this.around(cx, cy, new SVG.Matrix(1, Math.tan(y), Math.tan(x), 1, 0, 0))
    }
    // SkewX
  , skewX: function(x, cx, cy) {
      return this.skew(x, 0, cx, cy)
    }
    // SkewY
  , skewY: function(y, cx, cy) {
      return this.skew(0, y, cx, cy)
    }
    // Transform around a center point
  , around: function(cx, cy, matrix) {
      return this
        .multiply(new SVG.Matrix(1, 0, 0, 1, cx || 0, cy || 0))
        .multiply(matrix)
        .multiply(new SVG.Matrix(1, 0, 0, 1, -cx || 0, -cy || 0))
    }
    // Convert to native SVGMatrix
  , native: function() {
      // create new matrix
      var matrix = SVG.parser.native.createSVGMatrix();

      // update with current values
      for (var i = abcdef.length - 1; i >= 0; i--)
        matrix[abcdef[i]] = this[abcdef[i]];

      return matrix
    }
    // Convert matrix to string
  , toString: function() {
      // Construct the matrix directly, avoid values that are too small
      return 'matrix(' + float32String(this.a) + ',' + float32String(this.b)
        + ',' + float32String(this.c) + ',' + float32String(this.d)
        + ',' + float32String(this.e) + ',' + float32String(this.f)
        + ')'
    }
  }

  // Define parent
, parent: SVG.Element

  // Add parent method
, construct: {
    // Get current matrix
    ctm: function() {
      return new SVG.Matrix(this.node.getCTM())
    },
    // Get current screen matrix
    screenCTM: function() {
      /* https://bugzilla.mozilla.org/show_bug.cgi?id=1344537
         This is needed because FF does not return the transformation matrix
         for the inner coordinate system when getScreenCTM() is called on nested svgs.
         However all other Browsers do that */
      if(this instanceof SVG.Nested) {
        var rect = this.rect(1,1);
        var m = rect.node.getScreenCTM();
        rect.remove();
        return new SVG.Matrix(m)
      }
      return new SVG.Matrix(this.node.getScreenCTM())
    }

  }

});

SVG.Point = SVG.invent({
  // Initialize
  create: function(x,y) {
    var source, base = {x:0, y:0};

    // ensure source as object
    source = Array.isArray(x) ?
      {x:x[0], y:x[1]} :
    typeof x === 'object' ?
      {x:x.x, y:x.y} :
    x != null ?
      {x:x, y:(y != null ? y : x)} : base; // If y has no value, then x is used has its value

    // merge source
    this.x = source.x;
    this.y = source.y;
  }

  // Add methods
, extend: {
    // Clone point
    clone: function() {
      return new SVG.Point(this)
    }
    // Morph one point into another
  , morph: function(x, y) {
      // store new destination
      this.destination = new SVG.Point(x, y);

      return this
    }
    // Get morphed point at a given position
  , at: function(pos) {
      // make sure a destination is defined
      if (!this.destination) return this

      // calculate morphed matrix at a given position
      var point = new SVG.Point({
        x: this.x + (this.destination.x - this.x) * pos
      , y: this.y + (this.destination.y - this.y) * pos
      });

      return point
    }
    // Convert to native SVGPoint
  , native: function() {
      // create new point
      var point = SVG.parser.native.createSVGPoint();

      // update with current values
      point.x = this.x;
      point.y = this.y;

      return point
    }
    // transform point with matrix
  , transform: function(matrix) {
      return new SVG.Point(this.native().matrixTransform(matrix.native()))
    }

  }

});

SVG.extend(SVG.Element, {

  // Get point
  point: function(x, y) {
    return new SVG.Point(x,y).transform(this.screenCTM().inverse());
  }

});

SVG.extend(SVG.Element, {
  // Set svg element attribute
  attr: function(a, v, n) {
    // act as full getter
    if (a == null) {
      // get an object of attributes
      a = {};
      v = this.node.attributes;
      for (n = v.length - 1; n >= 0; n--)
        a[v[n].nodeName] = SVG.regex.isNumber.test(v[n].nodeValue) ? parseFloat(v[n].nodeValue) : v[n].nodeValue;

      return a

    } else if (typeof a == 'object') {
      // apply every attribute individually if an object is passed
      for (v in a) this.attr(v, a[v]);

    } else if (v === null) {
        // remove value
        this.node.removeAttribute(a);

    } else if (v == null) {
      // act as a getter if the first and only argument is not an object
      v = this.node.getAttribute(a);
      return v == null ?
        SVG.defaults.attrs[a] :
      SVG.regex.isNumber.test(v) ?
        parseFloat(v) : v

    } else {
      // BUG FIX: some browsers will render a stroke if a color is given even though stroke width is 0
      if (a == 'stroke-width')
        this.attr('stroke', parseFloat(v) > 0 ? this._stroke : null);
      else if (a == 'stroke')
        this._stroke = v;

      // convert image fill and stroke to patterns
      if (a == 'fill' || a == 'stroke') {
        if (SVG.regex.isImage.test(v))
          v = this.doc().defs().image(v, 0, 0);

        if (v instanceof SVG.Image)
          v = this.doc().defs().pattern(0, 0, function() {
            this.add(v);
          });
      }

      // ensure correct numeric values (also accepts NaN and Infinity)
      if (typeof v === 'number')
        v = new SVG.Number(v);

      // ensure full hex color
      else if (SVG.Color.isColor(v))
        v = new SVG.Color(v);

      // parse array values
      else if (Array.isArray(v))
        v = new SVG.Array(v);

      // if the passed attribute is leading...
      if (a == 'leading') {
        // ... call the leading method instead
        if (this.leading)
          this.leading(v);
      } else {
        // set given attribute on node
        typeof n === 'string' ?
          this.node.setAttributeNS(n, a, v.toString()) :
          this.node.setAttribute(a, v.toString());
      }

      // rebuild if required
      if (this.rebuild && (a == 'font-size' || a == 'x'))
        this.rebuild(a, v);
    }

    return this
  }
});
SVG.extend(SVG.Element, {
  // Add transformations
  transform: function(o, relative) {
    // get target in case of the fx module, otherwise reference this
    var target = this
      , matrix, bbox;

    // act as a getter
    if (typeof o !== 'object') {
      // get current matrix
      matrix = new SVG.Matrix(target).extract();

      return typeof o === 'string' ? matrix[o] : matrix
    }

    // get current matrix
    matrix = new SVG.Matrix(target);

    // ensure relative flag
    relative = !!relative || !!o.relative;

    // act on matrix
    if (o.a != null) {
      matrix = relative ?
        // relative
        matrix.multiply(new SVG.Matrix(o)) :
        // absolute
        new SVG.Matrix(o);

    // act on rotation
    } else if (o.rotation != null) {
      // ensure centre point
      ensureCentre(o, target);

      // apply transformation
      matrix = relative ?
        // relative
        matrix.rotate(o.rotation, o.cx, o.cy) :
        // absolute
        matrix.rotate(o.rotation - matrix.extract().rotation, o.cx, o.cy);

    // act on scale
    } else if (o.scale != null || o.scaleX != null || o.scaleY != null) {
      // ensure centre point
      ensureCentre(o, target);

      // ensure scale values on both axes
      o.scaleX = o.scale != null ? o.scale : o.scaleX != null ? o.scaleX : 1;
      o.scaleY = o.scale != null ? o.scale : o.scaleY != null ? o.scaleY : 1;

      if (!relative) {
        // absolute; multiply inversed values
        var e = matrix.extract();
        o.scaleX = o.scaleX * 1 / e.scaleX;
        o.scaleY = o.scaleY * 1 / e.scaleY;
      }

      matrix = matrix.scale(o.scaleX, o.scaleY, o.cx, o.cy);

    // act on skew
    } else if (o.skew != null || o.skewX != null || o.skewY != null) {
      // ensure centre point
      ensureCentre(o, target);

      // ensure skew values on both axes
      o.skewX = o.skew != null ? o.skew : o.skewX != null ? o.skewX : 0;
      o.skewY = o.skew != null ? o.skew : o.skewY != null ? o.skewY : 0;

      if (!relative) {
        // absolute; reset skew values
        var e = matrix.extract();
        matrix = matrix.multiply(new SVG.Matrix().skew(e.skewX, e.skewY, o.cx, o.cy).inverse());
      }

      matrix = matrix.skew(o.skewX, o.skewY, o.cx, o.cy);

    // act on flip
    } else if (o.flip) {
      if(o.flip == 'x' || o.flip == 'y') {
        o.offset = o.offset == null ? target.bbox()['c' + o.flip] : o.offset;
      } else {
        if(o.offset == null) {
          bbox = target.bbox();
          o.flip = bbox.cx;
          o.offset = bbox.cy;
        } else {
          o.flip = o.offset;
        }
      }

      matrix = new SVG.Matrix().flip(o.flip, o.offset);

    // act on translate
    } else if (o.x != null || o.y != null) {
      if (relative) {
        // relative
        matrix = matrix.translate(o.x, o.y);
      } else {
        // absolute
        if (o.x != null) matrix.e = o.x;
        if (o.y != null) matrix.f = o.y;
      }
    }

    return this.attr('transform', matrix)
  }
});

SVG.extend(SVG.FX, {
  transform: function(o, relative) {
    // get target in case of the fx module, otherwise reference this
    var target = this.target()
      , matrix, bbox;

    // act as a getter
    if (typeof o !== 'object') {
      // get current matrix
      matrix = new SVG.Matrix(target).extract();

      return typeof o === 'string' ? matrix[o] : matrix
    }

    // ensure relative flag
    relative = !!relative || !!o.relative;

    // act on matrix
    if (o.a != null) {
      matrix = new SVG.Matrix(o);

    // act on rotation
    } else if (o.rotation != null) {
      // ensure centre point
      ensureCentre(o, target);

      // apply transformation
      matrix = new SVG.Rotate(o.rotation, o.cx, o.cy);

    // act on scale
    } else if (o.scale != null || o.scaleX != null || o.scaleY != null) {
      // ensure centre point
      ensureCentre(o, target);

      // ensure scale values on both axes
      o.scaleX = o.scale != null ? o.scale : o.scaleX != null ? o.scaleX : 1;
      o.scaleY = o.scale != null ? o.scale : o.scaleY != null ? o.scaleY : 1;

      matrix = new SVG.Scale(o.scaleX, o.scaleY, o.cx, o.cy);

    // act on skew
    } else if (o.skewX != null || o.skewY != null) {
      // ensure centre point
      ensureCentre(o, target);

      // ensure skew values on both axes
      o.skewX = o.skewX != null ? o.skewX : 0;
      o.skewY = o.skewY != null ? o.skewY : 0;

      matrix = new SVG.Skew(o.skewX, o.skewY, o.cx, o.cy);

    // act on flip
    } else if (o.flip) {
      if(o.flip == 'x' || o.flip == 'y') {
        o.offset = o.offset == null ? target.bbox()['c' + o.flip] : o.offset;
      } else {
        if(o.offset == null) {
          bbox = target.bbox();
          o.flip = bbox.cx;
          o.offset = bbox.cy;
        } else {
          o.flip = o.offset;
        }
      }

      matrix = new SVG.Matrix().flip(o.flip, o.offset);

    // act on translate
    } else if (o.x != null || o.y != null) {
      matrix = new SVG.Translate(o.x, o.y);
    }

    if(!matrix) return this

    matrix.relative = relative;

    this.last().transforms.push(matrix);

    return this._callStart()
  }
});

SVG.extend(SVG.Element, {
  // Reset all transformations
  untransform: function() {
    return this.attr('transform', null)
  },
  // merge the whole transformation chain into one matrix and returns it
  matrixify: function() {

    var matrix = (this.attr('transform') || '')
      // split transformations
      .split(SVG.regex.transforms).slice(0,-1).map(function(str){
        // generate key => value pairs
        var kv = str.trim().split('(');
        return [kv[0], kv[1].split(SVG.regex.delimiter).map(function(str){ return parseFloat(str) })]
      })
      // merge every transformation into one matrix
      .reduce(function(matrix, transform){

        if(transform[0] == 'matrix') return matrix.multiply(arrayToMatrix(transform[1]))
        return matrix[transform[0]].apply(matrix, transform[1])

      }, new SVG.Matrix());

    return matrix
  },
  // add an element to another parent without changing the visual representation on the screen
  toParent: function(parent) {
    if(this == parent) return this
    var ctm = this.screenCTM();
    var pCtm = parent.screenCTM().inverse();

    this.addTo(parent).untransform().transform(pCtm.multiply(ctm));

    return this
  },
  // same as above with parent equals root-svg
  toDoc: function() {
    return this.toParent(this.doc())
  }

});

SVG.Transformation = SVG.invent({

  create: function(source, inversed){

    if(arguments.length > 1 && typeof inversed != 'boolean'){
      return this.constructor.call(this, [].slice.call(arguments))
    }

    if(Array.isArray(source)){
      for(var i = 0, len = this.arguments.length; i < len; ++i){
        this[this.arguments[i]] = source[i];
      }
    } else if(typeof source == 'object'){
      for(var i = 0, len = this.arguments.length; i < len; ++i){
        this[this.arguments[i]] = source[this.arguments[i]];
      }
    }

    this.inversed = false;

    if(inversed === true){
      this.inversed = true;
    }

  }

, extend: {

    arguments: []
  , method: ''

  , at: function(pos){

      var params = [];

      for(var i = 0, len = this.arguments.length; i < len; ++i){
        params.push(this[this.arguments[i]]);
      }

      var m = this._undo || new SVG.Matrix();

      m = new SVG.Matrix().morph(SVG.Matrix.prototype[this.method].apply(m, params)).at(pos);

      return this.inversed ? m.inverse() : m

    }

  , undo: function(o){
      for(var i = 0, len = this.arguments.length; i < len; ++i){
        o[this.arguments[i]] = typeof this[this.arguments[i]] == 'undefined' ? 0 : o[this.arguments[i]];
      }

      // The method SVG.Matrix.extract which was used before calling this
      // method to obtain a value for the parameter o doesn't return a cx and
      // a cy so we use the ones that were provided to this object at its creation
      o.cx = this.cx;
      o.cy = this.cy;

      this._undo = new SVG[capitalize(this.method)](o, true).at(1);

      return this
    }

  }

});

SVG.Translate = SVG.invent({

  parent: SVG.Matrix
, inherit: SVG.Transformation

, create: function(source, inversed){
    this.constructor.apply(this, [].slice.call(arguments));
  }

, extend: {
    arguments: ['transformedX', 'transformedY']
  , method: 'translate'
  }

});

SVG.Rotate = SVG.invent({

  parent: SVG.Matrix
, inherit: SVG.Transformation

, create: function(source, inversed){
    this.constructor.apply(this, [].slice.call(arguments));
  }

, extend: {
    arguments: ['rotation', 'cx', 'cy']
  , method: 'rotate'
  , at: function(pos){
      var m = new SVG.Matrix().rotate(new SVG.Number().morph(this.rotation - (this._undo ? this._undo.rotation : 0)).at(pos), this.cx, this.cy);
      return this.inversed ? m.inverse() : m
    }
  , undo: function(o){
      this._undo = o;
      return this
    }
  }

});

SVG.Scale = SVG.invent({

  parent: SVG.Matrix
, inherit: SVG.Transformation

, create: function(source, inversed){
    this.constructor.apply(this, [].slice.call(arguments));
  }

, extend: {
    arguments: ['scaleX', 'scaleY', 'cx', 'cy']
  , method: 'scale'
  }

});

SVG.Skew = SVG.invent({

  parent: SVG.Matrix
, inherit: SVG.Transformation

, create: function(source, inversed){
    this.constructor.apply(this, [].slice.call(arguments));
  }

, extend: {
    arguments: ['skewX', 'skewY', 'cx', 'cy']
  , method: 'skew'
  }

});

SVG.extend(SVG.Element, {
  // Dynamic style generator
  style: function(s, v) {
    if (arguments.length == 0) {
      // get full style
      return this.node.style.cssText || ''

    } else if (arguments.length < 2) {
      // apply every style individually if an object is passed
      if (typeof s == 'object') {
        for (v in s) this.style(v, s[v]);

      } else if (SVG.regex.isCss.test(s)) {
        // parse css string
        s = s.split(/\s*;\s*/)
          // filter out suffix ; and stuff like ;;
          .filter(function(e) { return !!e })
          .map(function(e){ return e.split(/\s*:\s*/) });

        // apply every definition individually
        while (v = s.pop()) {
          this.style(v[0], v[1]);
        }
      } else {
        // act as a getter if the first and only argument is not an object
        return this.node.style[camelCase(s)]
      }

    } else {
      this.node.style[camelCase(s)] = v === null || SVG.regex.isBlank.test(v) ? '' : v;
    }

    return this
  }
});
SVG.Parent = SVG.invent({
  // Initialize node
  create: function(element) {
    this.constructor.call(this, element);
  }

  // Inherit from
, inherit: SVG.Element

  // Add class methods
, extend: {
    // Returns all child elements
    children: function() {
      return SVG.utils.map(SVG.utils.filterSVGElements(this.node.childNodes), function(node) {
        return SVG.adopt(node)
      })
    }
    // Add given element at a position
  , add: function(element, i) {
      if (i == null)
        this.node.appendChild(element.node);
      else if (element.node != this.node.childNodes[i])
        this.node.insertBefore(element.node, this.node.childNodes[i]);

      return this
    }
    // Basically does the same as `add()` but returns the added element instead
  , put: function(element, i) {
      this.add(element, i);
      return element
    }
    // Checks if the given element is a child
  , has: function(element) {
      return this.index(element) >= 0
    }
    // Gets index of given element
  , index: function(element) {
      return [].slice.call(this.node.childNodes).indexOf(element.node)
    }
    // Get a element at the given index
  , get: function(i) {
      return SVG.adopt(this.node.childNodes[i])
    }
    // Get first child
  , first: function() {
      return this.get(0)
    }
    // Get the last child
  , last: function() {
      return this.get(this.node.childNodes.length - 1)
    }
    // Iterates over all children and invokes a given block
  , each: function(block, deep) {
      var i, il
        , children = this.children();

      for (i = 0, il = children.length; i < il; i++) {
        if (children[i] instanceof SVG.Element)
          block.apply(children[i], [i, children]);

        if (deep && (children[i] instanceof SVG.Container))
          children[i].each(block, deep);
      }

      return this
    }
    // Remove a given child
  , removeElement: function(element) {
      this.node.removeChild(element.node);

      return this
    }
    // Remove all elements in this container
  , clear: function() {
      // remove children
      while(this.node.hasChildNodes())
        this.node.removeChild(this.node.lastChild);

      // remove defs reference
      delete this._defs;

      return this
    }
  , // Get defs
    defs: function() {
      return this.doc().defs()
    }
  }

});

SVG.extend(SVG.Parent, {

  ungroup: function(parent, depth) {
    if(depth === 0 || this instanceof SVG.Defs || this.node == SVG.parser.draw) return this

    parent = parent || (this instanceof SVG.Doc ? this : this.parent(SVG.Parent));
    depth = depth || Infinity;

    this.each(function(){
      if(this instanceof SVG.Defs) return this
      if(this instanceof SVG.Parent) return this.ungroup(parent, depth-1)
      return this.toParent(parent)
    });

    this.node.firstChild || this.remove();

    return this
  },

  flatten: function(parent, depth) {
    return this.ungroup(parent, depth)
  }

});
SVG.Container = SVG.invent({
  // Initialize node
  create: function(element) {
    this.constructor.call(this, element);
  }

  // Inherit from
, inherit: SVG.Parent

});

SVG.ViewBox = SVG.invent({

  create: function(source) {
    var base = [0, 0, 0, 0];

    var x, y, width, height, view, we, he
      , wm   = 1 // width multiplier
      , hm   = 1 // height multiplier
      , reg  = /[+-]?(?:\d+(?:\.\d*)?|\.\d+)(?:e[+-]?\d+)?/gi;

    if(source instanceof SVG.Element){

      we = source;
      he = source;
      view = (source.attr('viewBox') || '').match(reg);
      source.bbox;

      // get dimensions of current node
      width  = new SVG.Number(source.width());
      height = new SVG.Number(source.height());

      // find nearest non-percentual dimensions
      while (width.unit == '%') {
        wm *= width.value;
        width = new SVG.Number(we instanceof SVG.Doc ? we.parent().offsetWidth : we.parent().width());
        we = we.parent();
      }
      while (height.unit == '%') {
        hm *= height.value;
        height = new SVG.Number(he instanceof SVG.Doc ? he.parent().offsetHeight : he.parent().height());
        he = he.parent();
      }

      // ensure defaults
      this.x      = 0;
      this.y      = 0;
      this.width  = width  * wm;
      this.height = height * hm;
      this.zoom   = 1;

      if (view) {
        // get width and height from viewbox
        x      = parseFloat(view[0]);
        y      = parseFloat(view[1]);
        width  = parseFloat(view[2]);
        height = parseFloat(view[3]);

        // calculate zoom accoring to viewbox
        this.zoom = ((this.width / this.height) > (width / height)) ?
          this.height / height :
          this.width  / width;

        // calculate real pixel dimensions on parent SVG.Doc element
        this.x      = x;
        this.y      = y;
        this.width  = width;
        this.height = height;

      }

    }else {

      // ensure source as object
      source = typeof source === 'string' ?
        source.match(reg).map(function(el){ return parseFloat(el) }) :
      Array.isArray(source) ?
        source :
      typeof source == 'object' ?
        [source.x, source.y, source.width, source.height] :
      arguments.length == 4 ?
        [].slice.call(arguments) :
        base;

      this.x = source[0];
      this.y = source[1];
      this.width = source[2];
      this.height = source[3];
    }


  }

, extend: {

    toString: function() {
      return this.x + ' ' + this.y + ' ' + this.width + ' ' + this.height
    }
  , morph: function(x, y, width, height){
      this.destination = new SVG.ViewBox(x, y, width, height);
      return this
    }

  , at: function(pos) {

      if(!this.destination) return this

      return new SVG.ViewBox([
          this.x + (this.destination.x - this.x) * pos
        , this.y + (this.destination.y - this.y) * pos
        , this.width + (this.destination.width - this.width) * pos
        , this.height + (this.destination.height - this.height) * pos
      ])

    }

  }

  // Define parent
, parent: SVG.Container

  // Add parent method
, construct: {

    // get/set viewbox
    viewbox: function(x, y, width, height) {
      if (arguments.length == 0)
        // act as a getter if there are no arguments
        return new SVG.ViewBox(this)

      // otherwise act as a setter
      return this.attr('viewBox', new SVG.ViewBox(x, y, width, height))
    }

  }

})
// Add events to elements

;[ 'click',
  'dblclick',
  'mousedown',
  'mouseup',
  'mouseover',
  'mouseout',
  'mousemove',
  'mouseenter',
  'mouseleave',
  'touchstart',
  'touchmove',
  'touchleave',
  'touchend',
  'touchcancel' ].forEach(function (event) {
    // add event to SVG.Element
    SVG.Element.prototype[event] = function (f) {
      // bind event to element rather than element node
      if (f == null) {
        SVG.off(this, event);
      } else {
        SVG.on(this, event, f);
      }
      return this
    };
  });

SVG.listenerId = 0;

// Add event binder in the SVG namespace
SVG.on = function (node, events, listener, binding, options) {
  var l = listener.bind(binding || node);
  var n = node instanceof SVG.Element ? node.node : node;

  // ensure instance object for nodes which are not adopted
  n.instance = n.instance || {_events: {}};

  var bag = n.instance._events;

  // add id to listener
  if (!listener._svgjsListenerId) { listener._svgjsListenerId = ++SVG.listenerId; }

  events.split(SVG.regex.delimiter).forEach(function (event) {
    var ev = event.split('.')[0];
    var ns = event.split('.')[1] || '*';

    // ensure valid object
    bag[ev] = bag[ev] || {};
    bag[ev][ns] = bag[ev][ns] || {};

    // reference listener
    bag[ev][ns][listener._svgjsListenerId] = l;

    // add listener
    n.addEventListener(ev, l, options || false);
  });
};

// Add event unbinder in the SVG namespace
SVG.off = function (node, events, listener, options) {
  var n = node instanceof SVG.Element ? node.node : node;
  if (!n.instance) return

  // listener can be a function or a number
  if (typeof listener === 'function') {
    listener = listener._svgjsListenerId;
    if (!listener) return
  }

  var bag = n.instance._events

  ;(events || '').split(SVG.regex.delimiter).forEach(function (event) {
    var ev = event && event.split('.')[0];
    var ns = event && event.split('.')[1];
    var namespace, l;

    if (listener) {
      // remove listener reference
      if (bag[ev] && bag[ev][ns || '*']) {
        // removeListener
        n.removeEventListener(ev, bag[ev][ns || '*'][listener], options || false);

        delete bag[ev][ns || '*'][listener];
      }
    } else if (ev && ns) {
      // remove all listeners for a namespaced event
      if (bag[ev] && bag[ev][ns]) {
        for (l in bag[ev][ns]) { SVG.off(n, [ev, ns].join('.'), l); }

        delete bag[ev][ns];
      }
    } else if (ns) {
      // remove all listeners for a specific namespace
      for (event in bag) {
        for (namespace in bag[event]) {
          if (ns === namespace) { SVG.off(n, [event, ns].join('.')); }
        }
      }
    } else if (ev) {
      // remove all listeners for the event
      if (bag[ev]) {
        for (namespace in bag[ev]) { SVG.off(n, [ev, namespace].join('.')); }

        delete bag[ev];
      }
    } else {
      // remove all listeners on a given node
      for (event in bag) { SVG.off(n, event); }

      n.instance._events = {};
    }
  });
};

SVG.extend(SVG.Element, {
  // Bind given event to listener
  on: function (event, listener, binding, options) {
    SVG.on(this, event, listener, binding, options);
    return this
  },
  // Unbind event from listener
  off: function (event, listener) {
    SVG.off(this.node, event, listener);
    return this
  },
  fire: function (event, data) {
    // Dispatch event
    if (event instanceof window.Event) {
      this.node.dispatchEvent(event);
    } else {
      this.node.dispatchEvent(event = new SVG.CustomEvent(event, {detail: data, cancelable: true}));
    }
    this._event = event;
    return this
  },
  event: function() {
    return this._event
  }
});


SVG.Defs = SVG.invent({
  // Initialize node
  create: 'defs'

  // Inherit from
, inherit: SVG.Container

});
SVG.G = SVG.invent({
  // Initialize node
  create: 'g'

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Move over x-axis
    x: function(x) {
      return x == null ? this.transform('x') : this.transform({ x: x - this.x() }, true)
    }
    // Move over y-axis
  , y: function(y) {
      return y == null ? this.transform('y') : this.transform({ y: y - this.y() }, true)
    }
    // Move by center over x-axis
  , cx: function(x) {
      return x == null ? this.gbox().cx : this.x(x - this.gbox().width / 2)
    }
    // Move by center over y-axis
  , cy: function(y) {
      return y == null ? this.gbox().cy : this.y(y - this.gbox().height / 2)
    }
  , gbox: function() {

      var bbox  = this.bbox()
        , trans = this.transform();

      bbox.x  += trans.x;
      bbox.x2 += trans.x;
      bbox.cx += trans.x;

      bbox.y  += trans.y;
      bbox.y2 += trans.y;
      bbox.cy += trans.y;

      return bbox
    }
  }

  // Add parent method
, construct: {
    // Create a group element
    group: function() {
      return this.put(new SVG.G)
    }
  }
});

SVG.Doc = SVG.invent({
  // Initialize node
  create: function(element) {
    if (element) {
      // ensure the presence of a dom element
      element = typeof element == 'string' ?
        document.getElementById(element) :
        element;

      // If the target is an svg element, use that element as the main wrapper.
      // This allows svg.js to work with svg documents as well.
      if (element.nodeName == 'svg') {
        this.constructor.call(this, element);
      } else {
        this.constructor.call(this, SVG.create('svg'));
        element.appendChild(this.node);
        this.size('100%', '100%');
      }

      // set svg element attributes and ensure defs node
      this.namespace().defs();
    }
  }

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Add namespaces
    namespace: function() {
      return this
        .attr({ xmlns: SVG.ns, version: '1.1' })
        .attr('xmlns:xlink', SVG.xlink, SVG.xmlns)
        .attr('xmlns:svgjs', SVG.svgjs, SVG.xmlns)
    }
    // Creates and returns defs element
  , defs: function() {
      if (!this._defs) {
        var defs;

        // Find or create a defs element in this instance
        if (defs = this.node.getElementsByTagName('defs')[0])
          this._defs = SVG.adopt(defs);
        else
          this._defs = new SVG.Defs;

        // Make sure the defs node is at the end of the stack
        this.node.appendChild(this._defs.node);
      }

      return this._defs
    }
    // custom parent method
  , parent: function() {
      if(!this.node.parentNode || this.node.parentNode.nodeName == '#document' || this.node.parentNode.nodeName == '#document-fragment') return null
      return this.node.parentNode
    }
    // Fix for possible sub-pixel offset. See:
    // https://bugzilla.mozilla.org/show_bug.cgi?id=608812
  , spof: function() {
      var pos = this.node.getScreenCTM();

      if (pos)
        this
          .style('left', (-pos.e % 1) + 'px')
          .style('top',  (-pos.f % 1) + 'px');

      return this
    }

      // Removes the doc from the DOM
  , remove: function() {
      if(this.parent()) {
        this.parent().removeChild(this.node);
      }

      return this
    }
  , clear: function() {
      // remove children
      while(this.node.hasChildNodes())
        this.node.removeChild(this.node.lastChild);

      // remove defs reference
      delete this._defs;

      // add back parser
      if(!SVG.parser.draw.parentNode)
        this.node.appendChild(SVG.parser.draw);

      return this
    }
  , clone: function (parent) {
      // write dom data to the dom so the clone can pickup the data
      this.writeDataToDom();

      // get reference to node
      var node = this.node;

      // clone element and assign new id
      var clone = assignNewId(node.cloneNode(true));

      // insert the clone in the given parent or after myself
      if(parent) {
        (parent.node || parent).appendChild(clone.node);
      } else {
        node.parentNode.insertBefore(clone.node, node.nextSibling);
      }

      return clone
    }
  }

});

// ### This module adds backward / forward functionality to elements.

//
SVG.extend(SVG.Element, {
  // Get all siblings, including myself
  siblings: function() {
    return this.parent().children()
  }
  // Get the curent position siblings
, position: function() {
    return this.parent().index(this)
  }
  // Get the next element (will return null if there is none)
, next: function() {
    return this.siblings()[this.position() + 1]
  }
  // Get the next element (will return null if there is none)
, previous: function() {
    return this.siblings()[this.position() - 1]
  }
  // Send given element one step forward
, forward: function() {
    var i = this.position() + 1
      , p = this.parent();

    // move node one step forward
    p.removeElement(this).add(this, i);

    // make sure defs node is always at the top
    if (p instanceof SVG.Doc)
      p.node.appendChild(p.defs().node);

    return this
  }
  // Send given element one step backward
, backward: function() {
    var i = this.position();

    if (i > 0)
      this.parent().removeElement(this).add(this, i - 1);

    return this
  }
  // Send given element all the way to the front
, front: function() {
    var p = this.parent();

    // Move node forward
    p.node.appendChild(this.node);

    // Make sure defs node is always at the top
    if (p instanceof SVG.Doc)
      p.node.appendChild(p.defs().node);

    return this
  }
  // Send given element all the way to the back
, back: function() {
    if (this.position() > 0)
      this.parent().removeElement(this).add(this, 0);

    return this
  }
  // Inserts a given element before the targeted element
, before: function(element) {
    element.remove();

    var i = this.position();

    this.parent().add(element, i);

    return this
  }
  // Insters a given element after the targeted element
, after: function(element) {
    element.remove();

    var i = this.position();

    this.parent().add(element, i + 1);

    return this
  }

});
SVG.Mask = SVG.invent({
  // Initialize node
  create: function() {
    this.constructor.call(this, SVG.create('mask'));

    // keep references to masked elements
    this.targets = [];
  }

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Unmask all masked elements and remove itself
    remove: function() {
      // unmask all targets
      for (var i = this.targets.length - 1; i >= 0; i--)
        if (this.targets[i])
          this.targets[i].unmask();
      this.targets = [];

      // remove mask from parent
      SVG.Element.prototype.remove.call(this);

      return this
    }
  }

  // Add parent method
, construct: {
    // Create masking element
    mask: function() {
      return this.defs().put(new SVG.Mask)
    }
  }
});


SVG.extend(SVG.Element, {
  // Distribute mask to svg element
  maskWith: function(element) {
    // use given mask or create a new one
    this.masker = element instanceof SVG.Mask ? element : this.parent().mask().add(element);

    // store reverence on self in mask
    this.masker.targets.push(this);

    // apply mask
    return this.attr('mask', 'url("#' + this.masker.attr('id') + '")')
  }
  // Unmask element
, unmask: function() {
    delete this.masker;
    return this.attr('mask', null)
  }

});

SVG.ClipPath = SVG.invent({
  // Initialize node
  create: function() {
    this.constructor.call(this, SVG.create('clipPath'));

    // keep references to clipped elements
    this.targets = [];
  }

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Unclip all clipped elements and remove itself
    remove: function() {
      // unclip all targets
      for (var i = this.targets.length - 1; i >= 0; i--)
        if (this.targets[i])
          this.targets[i].unclip();
      this.targets = [];

      // remove clipPath from parent
      this.parent().removeElement(this);

      return this
    }
  }

  // Add parent method
, construct: {
    // Create clipping element
    clip: function() {
      return this.defs().put(new SVG.ClipPath)
    }
  }
});

//
SVG.extend(SVG.Element, {
  // Distribute clipPath to svg element
  clipWith: function(element) {
    // use given clip or create a new one
    this.clipper = element instanceof SVG.ClipPath ? element : this.parent().clip().add(element);

    // store reverence on self in mask
    this.clipper.targets.push(this);

    // apply mask
    return this.attr('clip-path', 'url("#' + this.clipper.attr('id') + '")')
  }
  // Unclip element
, unclip: function() {
    delete this.clipper;
    return this.attr('clip-path', null)
  }

});
SVG.Gradient = SVG.invent({
  // Initialize node
  create: function(type) {
    this.constructor.call(this, SVG.create(type + 'Gradient'));

    // store type
    this.type = type;
  }

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Add a color stop
    at: function(offset, color, opacity) {
      return this.put(new SVG.Stop).update(offset, color, opacity)
    }
    // Update gradient
  , update: function(block) {
      // remove all stops
      this.clear();

      // invoke passed block
      if (typeof block == 'function')
        block.call(this, this);

      return this
    }
    // Return the fill id
  , fill: function() {
      return 'url(#' + this.id() + ')'
    }
    // Alias string convertion to fill
  , toString: function() {
      return this.fill()
    }
    // custom attr to handle transform
  , attr: function(a, b, c) {
      if(a == 'transform') a = 'gradientTransform';
      return SVG.Container.prototype.attr.call(this, a, b, c)
    }
  }

  // Add parent method
, construct: {
    // Create gradient element in defs
    gradient: function(type, block) {
      return this.defs().gradient(type, block)
    }
  }
});

// Add animatable methods to both gradient and fx module
SVG.extend(SVG.Gradient, SVG.FX, {
  // From position
  from: function(x, y) {
    return (this._target || this).type == 'radial' ?
      this.attr({ fx: new SVG.Number(x), fy: new SVG.Number(y) }) :
      this.attr({ x1: new SVG.Number(x), y1: new SVG.Number(y) })
  }
  // To position
, to: function(x, y) {
    return (this._target || this).type == 'radial' ?
      this.attr({ cx: new SVG.Number(x), cy: new SVG.Number(y) }) :
      this.attr({ x2: new SVG.Number(x), y2: new SVG.Number(y) })
  }
});

// Base gradient generation
SVG.extend(SVG.Defs, {
  // define gradient
  gradient: function(type, block) {
    return this.put(new SVG.Gradient(type)).update(block)
  }

});

SVG.Stop = SVG.invent({
  // Initialize node
  create: 'stop'

  // Inherit from
, inherit: SVG.Element

  // Add class methods
, extend: {
    // add color stops
    update: function(o) {
      if (typeof o == 'number' || o instanceof SVG.Number) {
        o = {
          offset:  arguments[0]
        , color:   arguments[1]
        , opacity: arguments[2]
        };
      }

      // set attributes
      if (o.opacity != null) this.attr('stop-opacity', o.opacity);
      if (o.color   != null) this.attr('stop-color', o.color);
      if (o.offset  != null) this.attr('offset', new SVG.Number(o.offset));

      return this
    }
  }

});

SVG.Pattern = SVG.invent({
  // Initialize node
  create: 'pattern'

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Return the fill id
    fill: function() {
      return 'url(#' + this.id() + ')'
    }
    // Update pattern by rebuilding
  , update: function(block) {
      // remove content
      this.clear();

      // invoke passed block
      if (typeof block == 'function')
        block.call(this, this);

      return this
    }
    // Alias string convertion to fill
  , toString: function() {
      return this.fill()
    }
    // custom attr to handle transform
  , attr: function(a, b, c) {
      if(a == 'transform') a = 'patternTransform';
      return SVG.Container.prototype.attr.call(this, a, b, c)
    }

  }

  // Add parent method
, construct: {
    // Create pattern element in defs
    pattern: function(width, height, block) {
      return this.defs().pattern(width, height, block)
    }
  }
});

SVG.extend(SVG.Defs, {
  // Define gradient
  pattern: function(width, height, block) {
    return this.put(new SVG.Pattern).update(block).attr({
      x:            0
    , y:            0
    , width:        width
    , height:       height
    , patternUnits: 'userSpaceOnUse'
    })
  }

});
SVG.Shape = SVG.invent({
  // Initialize node
  create: function(element) {
    this.constructor.call(this, element);
  }

  // Inherit from
, inherit: SVG.Element

});

SVG.Bare = SVG.invent({
  // Initialize
  create: function(element, inherit) {
    // construct element
    this.constructor.call(this, SVG.create(element));

    // inherit custom methods
    if (inherit)
      for (var method in inherit.prototype)
        if (typeof inherit.prototype[method] === 'function')
          this[method] = inherit.prototype[method];
  }

  // Inherit from
, inherit: SVG.Element

  // Add methods
, extend: {
    // Insert some plain text
    words: function(text) {
      // remove contents
      while (this.node.hasChildNodes())
        this.node.removeChild(this.node.lastChild);

      // create text node
      this.node.appendChild(document.createTextNode(text));

      return this
    }
  }
});


SVG.extend(SVG.Parent, {
  // Create an element that is not described by SVG.js
  element: function(element, inherit) {
    return this.put(new SVG.Bare(element, inherit))
  }
});

SVG.Symbol = SVG.invent({
  // Initialize node
  create: 'symbol'

  // Inherit from
, inherit: SVG.Container

, construct: {
    // create symbol
    symbol: function() {
      return this.put(new SVG.Symbol)
    }
  }
});

SVG.Use = SVG.invent({
  // Initialize node
  create: 'use'

  // Inherit from
, inherit: SVG.Shape

  // Add class methods
, extend: {
    // Use element as a reference
    element: function(element, file) {
      // Set lined element
      return this.attr('href', (file || '') + '#' + element, SVG.xlink)
    }
  }

  // Add parent method
, construct: {
    // Create a use element
    use: function(element, file) {
      return this.put(new SVG.Use).element(element, file)
    }
  }
});
SVG.Rect = SVG.invent({
  // Initialize node
  create: 'rect'

  // Inherit from
, inherit: SVG.Shape

  // Add parent method
, construct: {
    // Create a rect element
    rect: function(width, height) {
      return this.put(new SVG.Rect()).size(width, height)
    }
  }
});
SVG.Circle = SVG.invent({
  // Initialize node
  create: 'circle'

  // Inherit from
, inherit: SVG.Shape

  // Add parent method
, construct: {
    // Create circle element, based on ellipse
    circle: function(size) {
      return this.put(new SVG.Circle).rx(new SVG.Number(size).divide(2)).move(0, 0)
    }
  }
});

SVG.extend(SVG.Circle, SVG.FX, {
  // Radius x value
  rx: function(rx) {
    return this.attr('r', rx)
  }
  // Alias radius x value
, ry: function(ry) {
    return this.rx(ry)
  }
});

SVG.Ellipse = SVG.invent({
  // Initialize node
  create: 'ellipse'

  // Inherit from
, inherit: SVG.Shape

  // Add parent method
, construct: {
    // Create an ellipse
    ellipse: function(width, height) {
      return this.put(new SVG.Ellipse).size(width, height).move(0, 0)
    }
  }
});

SVG.extend(SVG.Ellipse, SVG.Rect, SVG.FX, {
  // Radius x value
  rx: function(rx) {
    return this.attr('rx', rx)
  }
  // Radius y value
, ry: function(ry) {
    return this.attr('ry', ry)
  }
});

// Add common method
SVG.extend(SVG.Circle, SVG.Ellipse, {
    // Move over x-axis
    x: function(x) {
      return x == null ? this.cx() - this.rx() : this.cx(x + this.rx())
    }
    // Move over y-axis
  , y: function(y) {
      return y == null ? this.cy() - this.ry() : this.cy(y + this.ry())
    }
    // Move by center over x-axis
  , cx: function(x) {
      return x == null ? this.attr('cx') : this.attr('cx', x)
    }
    // Move by center over y-axis
  , cy: function(y) {
      return y == null ? this.attr('cy') : this.attr('cy', y)
    }
    // Set width of element
  , width: function(width) {
      return width == null ? this.rx() * 2 : this.rx(new SVG.Number(width).divide(2))
    }
    // Set height of element
  , height: function(height) {
      return height == null ? this.ry() * 2 : this.ry(new SVG.Number(height).divide(2))
    }
    // Custom size function
  , size: function(width, height) {
      var p = proportionalSize(this, width, height);

      return this
        .rx(new SVG.Number(p.width).divide(2))
        .ry(new SVG.Number(p.height).divide(2))
    }
});
SVG.Line = SVG.invent({
  // Initialize node
  create: 'line'

  // Inherit from
, inherit: SVG.Shape

  // Add class methods
, extend: {
    // Get array
    array: function() {
      return new SVG.PointArray([
        [ this.attr('x1'), this.attr('y1') ]
      , [ this.attr('x2'), this.attr('y2') ]
      ])
    }
    // Overwrite native plot() method
  , plot: function(x1, y1, x2, y2) {
      if (x1 == null)
        return this.array()
      else if (typeof y1 !== 'undefined')
        x1 = { x1: x1, y1: y1, x2: x2, y2: y2 };
      else
        x1 = new SVG.PointArray(x1).toLine();

      return this.attr(x1)
    }
    // Move by left top corner
  , move: function(x, y) {
      return this.attr(this.array().move(x, y).toLine())
    }
    // Set element size to given width and height
  , size: function(width, height) {
      var p = proportionalSize(this, width, height);

      return this.attr(this.array().size(p.width, p.height).toLine())
    }
  }

  // Add parent method
, construct: {
    // Create a line element
    line: function(x1, y1, x2, y2) {
      // make sure plot is called as a setter
      // x1 is not necessarily a number, it can also be an array, a string and a SVG.PointArray
      return SVG.Line.prototype.plot.apply(
        this.put(new SVG.Line)
      , x1 != null ? [x1, y1, x2, y2] : [0, 0, 0, 0]
      )
    }
  }
});

SVG.Polyline = SVG.invent({
  // Initialize node
  create: 'polyline'

  // Inherit from
, inherit: SVG.Shape

  // Add parent method
, construct: {
    // Create a wrapped polyline element
    polyline: function(p) {
      // make sure plot is called as a setter
      return this.put(new SVG.Polyline).plot(p || new SVG.PointArray)
    }
  }
});

SVG.Polygon = SVG.invent({
  // Initialize node
  create: 'polygon'

  // Inherit from
, inherit: SVG.Shape

  // Add parent method
, construct: {
    // Create a wrapped polygon element
    polygon: function(p) {
      // make sure plot is called as a setter
      return this.put(new SVG.Polygon).plot(p || new SVG.PointArray)
    }
  }
});

// Add polygon-specific functions
SVG.extend(SVG.Polyline, SVG.Polygon, {
  // Get array
  array: function() {
    return this._array || (this._array = new SVG.PointArray(this.attr('points')))
  }
  // Plot new path
, plot: function(p) {
    return (p == null) ?
      this.array() :
      this.clear().attr('points', typeof p == 'string' ? p : (this._array = new SVG.PointArray(p)))
  }
  // Clear array cache
, clear: function() {
    delete this._array;
    return this
  }
  // Move by left top corner
, move: function(x, y) {
    return this.attr('points', this.array().move(x, y))
  }
  // Set element size to given width and height
, size: function(width, height) {
    var p = proportionalSize(this, width, height);

    return this.attr('points', this.array().size(p.width, p.height))
  }

});

// unify all point to point elements
SVG.extend(SVG.Line, SVG.Polyline, SVG.Polygon, {
  // Define morphable array
  morphArray:  SVG.PointArray
  // Move by left top corner over x-axis
, x: function(x) {
    return x == null ? this.bbox().x : this.move(x, this.bbox().y)
  }
  // Move by left top corner over y-axis
, y: function(y) {
    return y == null ? this.bbox().y : this.move(this.bbox().x, y)
  }
  // Set width of element
, width: function(width) {
    var b = this.bbox();

    return width == null ? b.width : this.size(width, b.height)
  }
  // Set height of element
, height: function(height) {
    var b = this.bbox();

    return height == null ? b.height : this.size(b.width, height)
  }
});
SVG.Path = SVG.invent({
  // Initialize node
  create: 'path'

  // Inherit from
, inherit: SVG.Shape

  // Add class methods
, extend: {
    // Define morphable array
    morphArray:  SVG.PathArray
    // Get array
  , array: function() {
      return this._array || (this._array = new SVG.PathArray(this.attr('d')))
    }
    // Plot new path
  , plot: function(d) {
      return (d == null) ?
        this.array() :
        this.clear().attr('d', typeof d == 'string' ? d : (this._array = new SVG.PathArray(d)))
    }
    // Clear array cache
  , clear: function() {
      delete this._array;
      return this
    }
    // Move by left top corner
  , move: function(x, y) {
      return this.attr('d', this.array().move(x, y))
    }
    // Move by left top corner over x-axis
  , x: function(x) {
      return x == null ? this.bbox().x : this.move(x, this.bbox().y)
    }
    // Move by left top corner over y-axis
  , y: function(y) {
      return y == null ? this.bbox().y : this.move(this.bbox().x, y)
    }
    // Set element size to given width and height
  , size: function(width, height) {
      var p = proportionalSize(this, width, height);

      return this.attr('d', this.array().size(p.width, p.height))
    }
    // Set width of element
  , width: function(width) {
      return width == null ? this.bbox().width : this.size(width, this.bbox().height)
    }
    // Set height of element
  , height: function(height) {
      return height == null ? this.bbox().height : this.size(this.bbox().width, height)
    }

  }

  // Add parent method
, construct: {
    // Create a wrapped path element
    path: function(d) {
      // make sure plot is called as a setter
      return this.put(new SVG.Path).plot(d || new SVG.PathArray)
    }
  }
});

SVG.Image = SVG.invent({
  // Initialize node
  create: 'image'

  // Inherit from
, inherit: SVG.Shape

  // Add class methods
, extend: {
    // (re)load image
    load: function(url) {
      if (!url) return this

      var self = this
        , img  = new window.Image();

      // preload image
      SVG.on(img, 'load', function() {
        SVG.off(img);

        var p = self.parent(SVG.Pattern);

        if(p === null) return

        // ensure image size
        if (self.width() == 0 && self.height() == 0)
          self.size(img.width, img.height);

        // ensure pattern size if not set
        if (p && p.width() == 0 && p.height() == 0)
          p.size(self.width(), self.height());

        // callback
        if (typeof self._loaded === 'function')
          self._loaded.call(self, {
            width:  img.width
          , height: img.height
          , ratio:  img.width / img.height
          , url:    url
          });
      });

      SVG.on(img, 'error', function(e){
        SVG.off(img);

        if (typeof self._error === 'function'){
            self._error.call(self, e);
        }
      });

      return this.attr('href', (img.src = this.src = url), SVG.xlink)
    }
    // Add loaded callback
  , loaded: function(loaded) {
      this._loaded = loaded;
      return this
    }

  , error: function(error) {
      this._error = error;
      return this
    }
  }

  // Add parent method
, construct: {
    // create image element, load image and set its size
    image: function(source, width, height) {
      return this.put(new SVG.Image).load(source).size(width || 0, height || width || 0)
    }
  }

});
SVG.Text = SVG.invent({
  // Initialize node
  create: function() {
    this.constructor.call(this, SVG.create('text'));

    this.dom.leading = new SVG.Number(1.3);    // store leading value for rebuilding
    this._rebuild = true;                      // enable automatic updating of dy values
    this._build   = false;                     // disable build mode for adding multiple lines

    // set default font
    this.attr('font-family', SVG.defaults.attrs['font-family']);
  }

  // Inherit from
, inherit: SVG.Shape

  // Add class methods
, extend: {
    // Move over x-axis
    x: function(x) {
      // act as getter
      if (x == null)
        return this.attr('x')

      return this.attr('x', x)
    }
    // Move over y-axis
  , y: function(y) {
      var oy = this.attr('y')
        , o  = typeof oy === 'number' ? oy - this.bbox().y : 0;

      // act as getter
      if (y == null)
        return typeof oy === 'number' ? oy - o : oy

      return this.attr('y', typeof y.valueOf() === 'number' ? y + o : y)
    }
    // Move center over x-axis
  , cx: function(x) {
      return x == null ? this.bbox().cx : this.x(x - this.bbox().width / 2)
    }
    // Move center over y-axis
  , cy: function(y) {
      return y == null ? this.bbox().cy : this.y(y - this.bbox().height / 2)
    }
    // Set the text content
  , text: function(text) {
      // act as getter
      if (typeof text === 'undefined'){
        var text = '';
        var children = this.node.childNodes;
        for(var i = 0, len = children.length; i < len; ++i){

          // add newline if its not the first child and newLined is set to true
          if(i != 0 && children[i].nodeType != 3 && SVG.adopt(children[i]).dom.newLined == true){
            text += '\n';
          }

          // add content of this node
          text += children[i].textContent;
        }

        return text
      }

      // remove existing content
      this.clear().build(true);

      if (typeof text === 'function') {
        // call block
        text.call(this, this);

      } else {
        // store text and make sure text is not blank
        text = text.split('\n');

        // build new lines
        for (var i = 0, il = text.length; i < il; i++)
          this.tspan(text[i]).newLine();
      }

      // disable build mode and rebuild lines
      return this.build(false).rebuild()
    }
    // Set font size
  , size: function(size) {
      return this.attr('font-size', size).rebuild()
    }
    // Set / get leading
  , leading: function(value) {
      // act as getter
      if (value == null)
        return this.dom.leading

      // act as setter
      this.dom.leading = new SVG.Number(value);

      return this.rebuild()
    }
    // Get all the first level lines
  , lines: function() {
      var node = (this.textPath && this.textPath() || this).node;

      // filter tspans and map them to SVG.js instances
      var lines = SVG.utils.map(SVG.utils.filterSVGElements(node.childNodes), function(el){
        return SVG.adopt(el)
      });

      // return an instance of SVG.set
      return new SVG.Set(lines)
    }
    // Rebuild appearance type
  , rebuild: function(rebuild) {
      // store new rebuild flag if given
      if (typeof rebuild == 'boolean')
        this._rebuild = rebuild;

      // define position of all lines
      if (this._rebuild) {
        var self = this
          , blankLineOffset = 0
          , dy = this.dom.leading * new SVG.Number(this.attr('font-size'));

        this.lines().each(function() {
          if (this.dom.newLined) {
            if (!self.textPath())
              this.attr('x', self.attr('x'));
            if(this.text() == '\n') {
              blankLineOffset += dy;
            }else {
              this.attr('dy', dy + blankLineOffset);
              blankLineOffset = 0;
            }
          }
        });

        this.fire('rebuild');
      }

      return this
    }
    // Enable / disable build mode
  , build: function(build) {
      this._build = !!build;
      return this
    }
    // overwrite method from parent to set data properly
  , setData: function(o){
      this.dom = o;
      this.dom.leading = new SVG.Number(o.leading || 1.3);
      return this
    }
  }

  // Add parent method
, construct: {
    // Create text element
    text: function(text) {
      return this.put(new SVG.Text).text(text)
    }
    // Create plain text element
  , plain: function(text) {
      return this.put(new SVG.Text).plain(text)
    }
  }

});

SVG.Tspan = SVG.invent({
  // Initialize node
  create: 'tspan'

  // Inherit from
, inherit: SVG.Shape

  // Add class methods
, extend: {
    // Set text content
    text: function(text) {
      if(text == null) return this.node.textContent + (this.dom.newLined ? '\n' : '')

      typeof text === 'function' ? text.call(this, this) : this.plain(text);

      return this
    }
    // Shortcut dx
  , dx: function(dx) {
      return this.attr('dx', dx)
    }
    // Shortcut dy
  , dy: function(dy) {
      return this.attr('dy', dy)
    }
    // Create new line
  , newLine: function() {
      // fetch text parent
      var t = this.parent(SVG.Text);

      // mark new line
      this.dom.newLined = true;

      // apply new hy¡n
      return this.dy(t.dom.leading * t.attr('font-size')).attr('x', t.x())
    }
  }

});

SVG.extend(SVG.Text, SVG.Tspan, {
  // Create plain text node
  plain: function(text) {
    // clear if build mode is disabled
    if (this._build === false)
      this.clear();

    // create text node
    this.node.appendChild(document.createTextNode(text));

    return this
  }
  // Create a tspan
, tspan: function(text) {
    var node  = (this.textPath && this.textPath() || this).node
      , tspan = new SVG.Tspan;

    // clear if build mode is disabled
    if (this._build === false)
      this.clear();

    // add new tspan
    node.appendChild(tspan.node);

    return tspan.text(text)
  }
  // Clear all lines
, clear: function() {
    var node = (this.textPath && this.textPath() || this).node;

    // remove existing child nodes
    while (node.hasChildNodes())
      node.removeChild(node.lastChild);

    return this
  }
  // Get length of text element
, length: function() {
    return this.node.getComputedTextLength()
  }
});

SVG.TextPath = SVG.invent({
  // Initialize node
  create: 'textPath'

  // Inherit from
, inherit: SVG.Parent

  // Define parent class
, parent: SVG.Text

  // Add parent method
, construct: {
    morphArray: SVG.PathArray
    // Create path for text to run on
  , path: function(d) {
      // create textPath element
      var path  = new SVG.TextPath
        , track = this.doc().defs().path(d);

      // move lines to textpath
      while (this.node.hasChildNodes())
        path.node.appendChild(this.node.firstChild);

      // add textPath element as child node
      this.node.appendChild(path.node);

      // link textPath to path and add content
      path.attr('href', '#' + track, SVG.xlink);

      return this
    }
    // return the array of the path track element
  , array: function() {
      var track = this.track();

      return track ? track.array() : null
    }
    // Plot path if any
  , plot: function(d) {
      var track = this.track()
        , pathArray = null;

      if (track) {
        pathArray = track.plot(d);
      }

      return (d == null) ? pathArray : this
    }
    // Get the path track element
  , track: function() {
      var path = this.textPath();

      if (path)
        return path.reference('href')
    }
    // Get the textPath child
  , textPath: function() {
      if (this.node.firstChild && this.node.firstChild.nodeName == 'textPath')
        return SVG.adopt(this.node.firstChild)
    }
  }
});

SVG.Nested = SVG.invent({
  // Initialize node
  create: function() {
    this.constructor.call(this, SVG.create('svg'));

    this.style('overflow', 'visible');
  }

  // Inherit from
, inherit: SVG.Container

  // Add parent method
, construct: {
    // Create nested svg document
    nested: function() {
      return this.put(new SVG.Nested)
    }
  }
});
SVG.A = SVG.invent({
  // Initialize node
  create: 'a'

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Link url
    to: function(url) {
      return this.attr('href', url, SVG.xlink)
    }
    // Link show attribute
  , show: function(target) {
      return this.attr('show', target, SVG.xlink)
    }
    // Link target attribute
  , target: function(target) {
      return this.attr('target', target)
    }
  }

  // Add parent method
, construct: {
    // Create a hyperlink element
    link: function(url) {
      return this.put(new SVG.A).to(url)
    }
  }
});

SVG.extend(SVG.Element, {
  // Create a hyperlink element
  linkTo: function(url) {
    var link = new SVG.A;

    if (typeof url == 'function')
      url.call(link, link);
    else
      link.to(url);

    return this.parent().put(link).put(this)
  }

});
SVG.Marker = SVG.invent({
  // Initialize node
  create: 'marker'

  // Inherit from
, inherit: SVG.Container

  // Add class methods
, extend: {
    // Set width of element
    width: function(width) {
      return this.attr('markerWidth', width)
    }
    // Set height of element
  , height: function(height) {
      return this.attr('markerHeight', height)
    }
    // Set marker refX and refY
  , ref: function(x, y) {
      return this.attr('refX', x).attr('refY', y)
    }
    // Update marker
  , update: function(block) {
      // remove all content
      this.clear();

      // invoke passed block
      if (typeof block == 'function')
        block.call(this, this);

      return this
    }
    // Return the fill id
  , toString: function() {
      return 'url(#' + this.id() + ')'
    }
  }

  // Add parent method
, construct: {
    marker: function(width, height, block) {
      // Create marker element in defs
      return this.defs().marker(width, height, block)
    }
  }

});

SVG.extend(SVG.Defs, {
  // Create marker
  marker: function(width, height, block) {
    // Set default viewbox to match the width and height, set ref to cx and cy and set orient to auto
    return this.put(new SVG.Marker)
      .size(width, height)
      .ref(width / 2, height / 2)
      .viewbox(0, 0, width, height)
      .attr('orient', 'auto')
      .update(block)
  }

});

SVG.extend(SVG.Line, SVG.Polyline, SVG.Polygon, SVG.Path, {
  // Create and attach markers
  marker: function(marker, width, height, block) {
    var attr = ['marker'];

    // Build attribute name
    if (marker != 'all') attr.push(marker);
    attr = attr.join('-');

    // Set marker attribute
    marker = arguments[1] instanceof SVG.Marker ?
      arguments[1] :
      this.doc().marker(width, height, block);

    return this.attr(attr, marker)
  }

});
// Define list of available attributes for stroke and fill
var sugar = {
  stroke: ['color', 'width', 'opacity', 'linecap', 'linejoin', 'miterlimit', 'dasharray', 'dashoffset']
, fill:   ['color', 'opacity', 'rule']
, prefix: function(t, a) {
    return a == 'color' ? t : t + '-' + a
  }
}

// Add sugar for fill and stroke
;['fill', 'stroke'].forEach(function(m) {
  var i, extension = {};

  extension[m] = function(o) {
    if (typeof o == 'undefined')
      return this
    if (typeof o == 'string' || SVG.Color.isRgb(o) || (o && typeof o.fill === 'function'))
      this.attr(m, o);

    else
      // set all attributes from sugar.fill and sugar.stroke list
      for (i = sugar[m].length - 1; i >= 0; i--)
        if (o[sugar[m][i]] != null)
          this.attr(sugar.prefix(m, sugar[m][i]), o[sugar[m][i]]);

    return this
  };

  SVG.extend(SVG.Element, SVG.FX, extension);

});

SVG.extend(SVG.Element, SVG.FX, {
  // Map rotation to transform
  rotate: function(d, cx, cy) {
    return this.transform({ rotation: d, cx: cx, cy: cy })
  }
  // Map skew to transform
, skew: function(x, y, cx, cy) {
    return arguments.length == 1  || arguments.length == 3 ?
      this.transform({ skew: x, cx: y, cy: cx }) :
      this.transform({ skewX: x, skewY: y, cx: cx, cy: cy })
  }
  // Map scale to transform
, scale: function(x, y, cx, cy) {
    return arguments.length == 1  || arguments.length == 3 ?
      this.transform({ scale: x, cx: y, cy: cx }) :
      this.transform({ scaleX: x, scaleY: y, cx: cx, cy: cy })
  }
  // Map translate to transform
, translate: function(x, y) {
    return this.transform({ x: x, y: y })
  }
  // Map flip to transform
, flip: function(a, o) {
    o = typeof a == 'number' ? a : o;
    return this.transform({ flip: a || 'both', offset: o })
  }
  // Map matrix to transform
, matrix: function(m) {
    return this.attr('transform', new SVG.Matrix(arguments.length == 6 ? [].slice.call(arguments) : m))
  }
  // Opacity
, opacity: function(value) {
    return this.attr('opacity', value)
  }
  // Relative move over x axis
, dx: function(x) {
    return this.x(new SVG.Number(x).plus(this instanceof SVG.FX ? 0 : this.x()), true)
  }
  // Relative move over y axis
, dy: function(y) {
    return this.y(new SVG.Number(y).plus(this instanceof SVG.FX ? 0 : this.y()), true)
  }
  // Relative move over x and y axes
, dmove: function(x, y) {
    return this.dx(x).dy(y)
  }
});

SVG.extend(SVG.Rect, SVG.Ellipse, SVG.Circle, SVG.Gradient, SVG.FX, {
  // Add x and y radius
  radius: function(x, y) {
    var type = (this._target || this).type;
    return type == 'radial' || type == 'circle' ?
      this.attr('r', new SVG.Number(x)) :
      this.rx(x).ry(y == null ? x : y)
  }
});

SVG.extend(SVG.Path, {
  // Get path length
  length: function() {
    return this.node.getTotalLength()
  }
  // Get point at length
, pointAt: function(length) {
    return this.node.getPointAtLength(length)
  }
});

SVG.extend(SVG.Parent, SVG.Text, SVG.Tspan, SVG.FX, {
  // Set font
  font: function(a, v) {
    if (typeof a == 'object') {
      for (v in a) this.font(v, a[v]);
    }

    return a == 'leading' ?
        this.leading(v) :
      a == 'anchor' ?
        this.attr('text-anchor', v) :
      a == 'size' || a == 'family' || a == 'weight' || a == 'stretch' || a == 'variant' || a == 'style' ?
        this.attr('font-'+ a, v) :
        this.attr(a, v)
  }
});

SVG.Set = SVG.invent({
  // Initialize
  create: function(members) {
    if (members instanceof SVG.Set) {
      this.members = members.members.slice();
    } else {
      Array.isArray(members) ? this.members = members : this.clear();
    }
  }

  // Add class methods
, extend: {
    // Add element to set
    add: function() {
      var i, il, elements = [].slice.call(arguments);

      for (i = 0, il = elements.length; i < il; i++)
        this.members.push(elements[i]);

      return this
    }
    // Remove element from set
  , remove: function(element) {
      var i = this.index(element);

      // remove given child
      if (i > -1)
        this.members.splice(i, 1);

      return this
    }
    // Iterate over all members
  , each: function(block) {
      for (var i = 0, il = this.members.length; i < il; i++)
        block.apply(this.members[i], [i, this.members]);

      return this
    }
    // Restore to defaults
  , clear: function() {
      // initialize store
      this.members = [];

      return this
    }
    // Get the length of a set
  , length: function() {
      return this.members.length
    }
    // Checks if a given element is present in set
  , has: function(element) {
      return this.index(element) >= 0
    }
    // retuns index of given element in set
  , index: function(element) {
      return this.members.indexOf(element)
    }
    // Get member at given index
  , get: function(i) {
      return this.members[i]
    }
    // Get first member
  , first: function() {
      return this.get(0)
    }
    // Get last member
  , last: function() {
      return this.get(this.members.length - 1)
    }
    // Default value
  , valueOf: function() {
      return this.members
    }
    // Get the bounding box of all members included or empty box if set has no items
  , bbox: function(){
      // return an empty box of there are no members
      if (this.members.length == 0)
        return new SVG.RBox()

      // get the first rbox and update the target bbox
      var rbox = this.members[0].rbox(this.members[0].doc());

      this.each(function() {
        // user rbox for correct position and visual representation
        rbox = rbox.merge(this.rbox(this.doc()));
      });

      return rbox
    }
  }

  // Add parent method
, construct: {
    // Create a new set
    set: function(members) {
      return new SVG.Set(members)
    }
  }
});

SVG.FX.Set = SVG.invent({
  // Initialize node
  create: function(set) {
    // store reference to set
    this.set = set;
  }

});

// Alias methods
SVG.Set.inherit = function() {
  var m
    , methods = [];

  // gather shape methods
  for(var m in SVG.Shape.prototype)
    if (typeof SVG.Shape.prototype[m] == 'function' && typeof SVG.Set.prototype[m] != 'function')
      methods.push(m);

  // apply shape aliasses
  methods.forEach(function(method) {
    SVG.Set.prototype[method] = function() {
      for (var i = 0, il = this.members.length; i < il; i++)
        if (this.members[i] && typeof this.members[i][method] == 'function')
          this.members[i][method].apply(this.members[i], arguments);

      return method == 'animate' ? (this.fx || (this.fx = new SVG.FX.Set(this))) : this
    };
  });

  // clear methods for the next round
  methods = [];

  // gather fx methods
  for(var m in SVG.FX.prototype)
    if (typeof SVG.FX.prototype[m] == 'function' && typeof SVG.FX.Set.prototype[m] != 'function')
      methods.push(m);

  // apply fx aliasses
  methods.forEach(function(method) {
    SVG.FX.Set.prototype[method] = function() {
      for (var i = 0, il = this.set.members.length; i < il; i++)
        this.set.members[i].fx[method].apply(this.set.members[i].fx, arguments);

      return this
    };
  });
};


SVG.extend(SVG.Element, {
  // Store data values on svg nodes
  data: function(a, v, r) {
    if (typeof a == 'object') {
      for (v in a)
        this.data(v, a[v]);

    } else if (arguments.length < 2) {
      try {
        return JSON.parse(this.attr('data-' + a))
      } catch(e) {
        return this.attr('data-' + a)
      }

    } else {
      this.attr(
        'data-' + a
      , v === null ?
          null :
        r === true || typeof v === 'string' || typeof v === 'number' ?
          v :
          JSON.stringify(v)
      );
    }

    return this
  }
});
SVG.extend(SVG.Element, {
  // Remember arbitrary data
  remember: function(k, v) {
    // remember every item in an object individually
    if (typeof arguments[0] == 'object')
      for (var v in k)
        this.remember(v, k[v]);

    // retrieve memory
    else if (arguments.length == 1)
      return this.memory()[k]

    // store memory
    else
      this.memory()[k] = v;

    return this
  }

  // Erase a given memory
, forget: function() {
    if (arguments.length == 0)
      this._memory = {};
    else
      for (var i = arguments.length - 1; i >= 0; i--)
        delete this.memory()[arguments[i]];

    return this
  }

  // Initialize or return local memory object
, memory: function() {
    return this._memory || (this._memory = {})
  }

});
// Method for getting an element by id
SVG.get = function(id) {
  var node = document.getElementById(idFromReference(id) || id);
  return SVG.adopt(node)
};

// Select elements by query string
SVG.select = function(query, parent) {
  return new SVG.Set(
    SVG.utils.map((parent || document).querySelectorAll(query), function(node) {
      return SVG.adopt(node)
    })
  )
};

SVG.extend(SVG.Parent, {
  // Scoped select method
  select: function(query) {
    return SVG.select(query, this.node)
  }

});
function pathRegReplace(a, b, c, d) {
  return c + d.replace(SVG.regex.dots, ' .')
}

// creates deep clone of array
function array_clone(arr){
  var clone = arr.slice(0);
  for(var i = clone.length; i--;){
    if(Array.isArray(clone[i])){
      clone[i] = array_clone(clone[i]);
    }
  }
  return clone
}

// tests if a given element is instance of an object
function is(el, obj){
  return el instanceof obj
}

// tests if a given selector matches an element
function matches(el, selector) {
  return (el.matches || el.matchesSelector || el.msMatchesSelector || el.mozMatchesSelector || el.webkitMatchesSelector || el.oMatchesSelector).call(el, selector);
}

// Convert dash-separated-string to camelCase
function camelCase(s) {
  return s.toLowerCase().replace(/-(.)/g, function(m, g) {
    return g.toUpperCase()
  })
}

// Capitalize first letter of a string
function capitalize(s) {
  return s.charAt(0).toUpperCase() + s.slice(1)
}

// Ensure to six-based hex
function fullHex(hex) {
  return hex.length == 4 ?
    [ '#',
      hex.substring(1, 2), hex.substring(1, 2)
    , hex.substring(2, 3), hex.substring(2, 3)
    , hex.substring(3, 4), hex.substring(3, 4)
    ].join('') : hex
}

// Component to hex value
function compToHex(comp) {
  var hex = comp.toString(16);
  return hex.length == 1 ? '0' + hex : hex
}

// Calculate proportional width and height values when necessary
function proportionalSize(element, width, height) {
  if (width == null || height == null) {
    var box = element.bbox();

    if (width == null)
      width = box.width / box.height * height;
    else if (height == null)
      height = box.height / box.width * width;
  }

  return {
    width:  width
  , height: height
  }
}

// Delta transform point
function deltaTransformPoint(matrix, x, y) {
  return {
    x: x * matrix.a + y * matrix.c + 0
  , y: x * matrix.b + y * matrix.d + 0
  }
}

// Map matrix array to object
function arrayToMatrix(a) {
  return { a: a[0], b: a[1], c: a[2], d: a[3], e: a[4], f: a[5] }
}

// Parse matrix if required
function parseMatrix(matrix) {
  if (!(matrix instanceof SVG.Matrix))
    matrix = new SVG.Matrix(matrix);

  return matrix
}

// Add centre point to transform object
function ensureCentre(o, target) {
  o.cx = o.cx == null ? target.bbox().cx : o.cx;
  o.cy = o.cy == null ? target.bbox().cy : o.cy;
}

// PathArray Helpers
function arrayToString(a) {
  for (var i = 0, il = a.length, s = ''; i < il; i++) {
    s += a[i][0];

    if (a[i][1] != null) {
      s += a[i][1];

      if (a[i][2] != null) {
        s += ' ';
        s += a[i][2];

        if (a[i][3] != null) {
          s += ' ';
          s += a[i][3];
          s += ' ';
          s += a[i][4];

          if (a[i][5] != null) {
            s += ' ';
            s += a[i][5];
            s += ' ';
            s += a[i][6];

            if (a[i][7] != null) {
              s += ' ';
              s += a[i][7];
            }
          }
        }
      }
    }
  }

  return s + ' '
}

// Deep new id assignment
function assignNewId(node) {
  // do the same for SVG child nodes as well
  for (var i = node.childNodes.length - 1; i >= 0; i--)
    if (node.childNodes[i] instanceof window.SVGElement)
      assignNewId(node.childNodes[i]);

  return SVG.adopt(node).id(SVG.eid(node.nodeName))
}

// Add more bounding box properties
function fullBox(b) {
  if (b.x == null) {
    b.x      = 0;
    b.y      = 0;
    b.width  = 0;
    b.height = 0;
  }

  b.w  = b.width;
  b.h  = b.height;
  b.x2 = b.x + b.width;
  b.y2 = b.y + b.height;
  b.cx = b.x + b.width / 2;
  b.cy = b.y + b.height / 2;

  return b
}

// Get id from reference string
function idFromReference(url) {
  var m = (url || '').toString().match(SVG.regex.reference);

  if (m) return m[1]
}

// If values like 1e-88 are passed, this is not a valid 32 bit float,
// but in those cases, we are so close to 0 that 0 works well!
function float32String(v) {
  return Math.abs(v) > 1e-37 ? v : 0
}

// Create matrix array for looping
var abcdef = 'abcdef'.split('');

// Add CustomEvent to IE9 and IE10
if (typeof window.CustomEvent !== 'function') {
  // Code from: https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent
  var CustomEventPoly = function(event, options) {
    options = options || { bubbles: false, cancelable: false, detail: undefined };
    var e = document.createEvent('CustomEvent');
    e.initCustomEvent(event, options.bubbles, options.cancelable, options.detail);
    return e
  };

  CustomEventPoly.prototype = window.Event.prototype;

  SVG.CustomEvent = CustomEventPoly;
} else {
  SVG.CustomEvent = window.CustomEvent;
}

// requestAnimationFrame / cancelAnimationFrame Polyfill with fallback based on Paul Irish
(function(w) {
  var lastTime = 0;
  var vendors = ['moz', 'webkit'];

  for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
    w.requestAnimationFrame = w[vendors[x] + 'RequestAnimationFrame'];
    w.cancelAnimationFrame  = w[vendors[x] + 'CancelAnimationFrame'] ||
                              w[vendors[x] + 'CancelRequestAnimationFrame'];
  }

  w.requestAnimationFrame = w.requestAnimationFrame ||
    function(callback) {
      var currTime = new Date().getTime();
      var timeToCall = Math.max(0, 16 - (currTime - lastTime));

      var id = w.setTimeout(function() {
        callback(currTime + timeToCall);
      }, timeToCall);

      lastTime = currTime + timeToCall;
      return id
    };

  w.cancelAnimationFrame = w.cancelAnimationFrame || w.clearTimeout;

}(window));

return SVG

}));
});

class History {
    constructor(limit) {
        this.limit = 50;
        this.undos = [];
        this.redos = [];
        this.saveCommand = null;
        this.limit = limit || 50;
    }
    execute(command) {
        this.clearRedo();
        command.execute();
        var length = this.undos.length;
        if (length >= this.limit) {
            this.undos.shift();
        }
        this.undos.push(command);
        this.change(command);
    }
    undo() {
        if (this.canUndo()) {
            var command = this.undos.pop();
            this.redos.push(command);
            command.undo();
            this.change(command);
        }
    }
    canUndo() {
        return !!this.undos.length;
    }
    redo() {
        if (this.canRedo()) {
            var command = this.redos.pop();
            this.undos.push(command);
            command.redo();
            this.change(command);
        }
    }
    canRedo() {
        return !!this.redos.length;
    }
    save() {
        this.saveCommand = this.undos[this.undos.length - 1];
    }
    dirty() {
        return this.saveCommand != this.undos[this.undos.length - 1];
    }
    clearRedo() {
        this.redos = [];
    }
    clear() {
        this.undos = [];
        this.redos = [];
        this.saveCommand = null;
        this.change();
    }
    change(cmd) {
    }
}

class Command {
    constructor(name) {
        this.name = name;
    }
    execute() { }
    undo() { }
    redo() {
        this.execute();
    }
    refresh(mind) {
        var m = mind || this.mind;
        if (m) {
            m.emit('renderEditNode', {});
            m.emit('mindMapChange', {});
        }
    }
}
class AddNode extends Command {
    constructor(node, parent, mind) {
        super('addNode');
        this.parent = null;
        this.mind = null;
        this.index = -1;
        this.node = node;
        this.parent = parent;
        this.mind = mind || this.node.mindmap;
    }
    execute() {
        if (this.index > -1) {
            this.mind.addNode(this.node, this.parent, this.index); //add node to position of parent children
        }
        else {
            this.mind.addNode(this.node, this.parent);
        }
        this.node.refreshBox();
        this.refresh();
        this.mind.clearSelectNode();
        setTimeout(() => {
            this.node.select();
            this.node.edit();
        }, 0);
    }
    undo() {
        var p = this.node.parent;
        this.index = this.mind.removeNode(this.node);
        this.mind.clearSelectNode();
        setTimeout(() => {
            this.refresh();
            p && p.select();
        }, 0);
    }
}
class RemoveNode extends Command {
    constructor(node, mind) {
        super('removeNode');
        this.parent = null;
        this.mind = null;
        this.index = -1;
        this.node = node;
        this.parent = this.node.parent || null;
        this.mind = mind || this.node.mindmap;
    }
    execute() {
        this.node.clearCacheData();
        this.mind.clearSelectNode();
        this.index = this.mind.removeNode(this.node);
        this.refresh();
        this.parent && this.parent.select();
    }
    undo() {
        this.mind.addNode(this.node, this.parent, this.index);
        this.node.clearCacheData();
        this.node.refreshBox();
        this.mind.clearSelectNode();
        this.refresh();
        setTimeout(() => {
            this.node.select();
        }, 0);
    }
}
class ChangeNodeText extends Command {
    constructor(node, oldText, text) {
        super('changeNodeText');
        this.node = node;
        this.oldText = oldText;
        this.text = text;
        this.isFirst = true;
    }
    execute() {
        if (!this.isFirst) {
            this.node.setText(this.text);
        }
        this.node.refreshBox();
        this.node.clearCacheData();
        this.refresh(this.node.mindmap);
    }
    undo() {
        this.node.setText(this.oldText);
        this.node.clearCacheData();
        this.node.refreshBox();
        this.refresh(this.node.mindmap);
        this.isFirst = false;
    }
}
class MoveNode extends Command {
    constructor(data) {
        super('moveNode');
        this.data = {};
        this.index = -1;
        this.data = data;
        if (this.data.type.indexOf('child') > -1) {
            this.node = this.data.node;
            this.oldParent = this.data.oldParent;
            this.parent = this.data.parent;
        }
        else {
            this.node = this.data.node;
            this.oldParent = this.node.parent;
            this.dropNode = this.data.dropNode;
            this.newParent = this.dropNode.parent;
            this.type = this.data.direct;
        }
    }
    execute() {
        this.node.mindmap.clearSelectNode();
        if (this.data.type.indexOf('child') > -1) {
            if (this.oldParent) {
                this.index = this.oldParent.removeChild(this.node);
            }
            this.parent.addChild(this.node);
            this.node.mindmap.traverseBF((n) => {
                n.boundingRect = null;
                n.stroke = '';
            }, this.node);
            this.node.clearCacheData();
            this.oldParent.clearCacheData();
            this.refresh(this.node.mindmap);
            this.node.select();
        }
        else {
            if (this.oldParent) {
                this.index = this.oldParent.removeChild(this.node);
            }
            this.node.mindmap.traverseBF((n) => {
                n.boundingRect = null;
                n.stroke = '';
            }, this.node);
            this.oldParent.clearCacheData();
            var dropNodeIndex = this.newParent.children.indexOf(this.dropNode);
            if (this.type == 'top' || this.type == 'left') {
                this.newParent.addChild(this.node, dropNodeIndex);
            }
            else {
                this.newParent.addChild(this.node, dropNodeIndex + 1);
            }
            this.node.clearCacheData();
            this.refresh(this.node.mindmap);
            this.node.select();
        }
    }
    undo() {
        this.node.mindmap.clearSelectNode();
        if (this.data.type.indexOf('child') > -1) {
            this.parent.removeChild(this.node);
            if (this.oldParent) {
                this.oldParent.addChild(this.node, this.index);
            }
            this.node.mindmap.traverseBF((n) => {
                n.boundingRect = null;
                n.stroke = '';
            }, this.node);
            this.parent.clearCacheData();
            this.node.clearCacheData();
            this.refresh(this.node.mindmap);
            this.node.select();
        }
        else {
            this.newParent.removeChild(this.node);
            this.dropNode.clearCacheData();
            this.oldParent.addChild(this.node, this.index);
            this.node.clearCacheData();
            this.refresh(this.node.mindmap);
            this.node.select();
        }
    }
}
class MovePos extends Command {
    constructor(node, oldPos, newPos) {
        super('movePos');
        this.node = node;
        this.oldPos = oldPos;
        this.newPos = newPos;
    }
    execute() {
        this.node.setPosition(this.newPos.x, this.newPos.y);
        this.refresh(this.node.mindmap);
    }
    undo() {
        this.node.setPosition(this.oldPos.x, this.oldPos.y);
        this.refresh(this.node.mindmap);
    }
}
class CollapseNode extends Command {
    constructor(node) {
        super('collapseNOde');
        this.node = node;
        this.node.mindmap.clearSelectNode();
        this.node.refreshBox();
    }
    execute() {
        this.node.clearCacheData();
        this.node.collapse();
        this.refresh(this.node.mindmap);
        this.node.select();
    }
    undo() {
        this.node.clearCacheData();
        this.node.expand();
        this.refresh(this.node.mindmap);
        this.node.select();
    }
}
class ExpandNode extends Command {
    constructor(node) {
        super('collapseNOde');
        this.node = node;
        this.node.mindmap.clearSelectNode();
        this.node.refreshBox();
    }
    execute() {
        this.node.clearCacheData();
        this.node.expand();
        this.refresh(this.node.mindmap);
        this.node.select();
    }
    undo() {
        this.node.clearCacheData();
        this.node.collapse();
        this.refresh(this.node.mindmap);
        this.node.select();
    }
}
class PasteNode extends Command {
    constructor(node, data) {
        super('copyNode');
        this.waitCollapse = [];
        this.node = node;
        this.data = data;
        this.mind = this.node.mindmap;
        this.waitCollapse = [];
    }
    execute() {
        this.paste();
    }
    undo() {
        if (this.firstNode) {
            this.mind.removeNode(this.firstNode);
            this.node.clearCacheData();
            // this.updateItems(this.node);
            this.refresh(this.node.mindmap);
        }
    }
    paste() {
        this.data.forEach((d, i) => {
            var n = new Node(d, this.mind);
            n.mindmap = this.mind;
            if (!d.isExpand) {
                this.waitCollapse.push(n);
            }
            if (i == 0) {
                n.data.pid = this.node.getId();
                this.mind.addNode(n, this.node);
                this.firstNode = n;
                n.setPosition(0, 0);
                n.refreshBox();
            }
            else {
                var parent = this.mind.getNodeById(d.pid);
                if (parent) {
                    this.mind.addNode(n, parent);
                    n.setPosition(0, 0);
                    n.refreshBox();
                }
            }
            if (i == this.data.length - 1) {
                n.clearCacheData();
                this.refresh(this.mind);
            }
        });
    }
}

class Exec {
    constructor() {
        this.history = new History(50);
    }
    execute(name, data) {
        switch (name) {
            case 'addChildNode':
            case 'addSiblingNode':
                if (data) {
                    var d = {
                        id: uuid(),
                        text: data.text || t('Sub title')
                    };
                    var parent = data.parent;
                    var node = new Node(d, parent.mindmap);
                    this.history.execute(new AddNode(node, data.parent, parent.mindmap));
                }
                break;
            case 'deleteNodeAndChild':
                if (data) {
                    var node = data.node;
                    this.history.execute(new RemoveNode(node, node.mindmap));
                }
                break;
            case 'deleteNodeExcludeChild':
                break;
            case 'changeNodeText':
                if (data) {
                    this.history.execute(new ChangeNodeText(data.node, data.oldText, data.text));
                }
                break;
            case 'moveNode':
                if (data) {
                    this.history.execute(new MoveNode(data));
                }
                break;
            case 'movePosition':
                if (data) {
                    this.history.execute(new MovePos(data.node, data.oldPos, data.newPos));
                }
                break;
            case 'expandNode':
                if (data) {
                    this.history.execute(new ExpandNode(data.node));
                }
                break;
            case 'collapseNode':
                if (data) {
                    this.history.execute(new CollapseNode(data.node));
                }
                break;
            case 'pasteNode':
                this.history.execute(new PasteNode(data.node, data.data));
                break;
        }
    }
    undo() {
        this.history.undo();
    }
    redo() {
        this.history.redo();
    }
}

var mind = {};
var color = ['#fda16c', '#74bdf7', '#71FF5E', 'orange', '#D4D4AA', 'yellow'];
var canvasWidth = 8000;
var canvasHeight = 8000;
const importXmind = function (data) {
    mind = {
        "theme": 'blue',
        "mindData": [],
        "induceData": [],
        "wireFrameData": [],
        "relateLink": [],
        "background": '',
        "relateLinkData": [],
        "calloutData": [],
        'marks': [],
    };
    var mainlist = [];
    transferData(data.rootTopic, null, mainlist, true);
    var root = mainlist[0];
    data.rootTopic.children && data.rootTopic.children.detached && data.rootTopic.children.detached.forEach(d => {
        var list = [];
        transferData(d, root.id, list);
        mainlist = mainlist.concat(list);
    });
    mind.mindData.push(mainlist);
    mind.basicData = transferListToData(mainlist);
    data.relationships && data.relationships.forEach(rl => {
        var obj = {
            startNodeId: rl.end1Id,
            endNodeId: rl.end2Id,
            nodeData: {
                'text': '',
                'nodeType': 'relateLink',
                'backgroundColor': '#f06'
            }
        };
        if (rl.title) {
            obj.nodeData.text = rl.title;
        }
        mind.relateLinkData.push(obj);
    });
    return mind;
};
var task = {
    'task-start': '0',
    'task-oct': '10',
    'task-3oct': '30',
    'task-5oct': '50',
    'task-7oct': '70',
    'task-9oct': '90',
    'task-done': '100',
};
function transferListToData(list) {
    var obj = {};
    var root = null;
    function transfer(data, i) {
        var nodeData = {
            id: data.id,
            text: data.text,
            children: [],
            expanded: true
        };
        if (i == 0) {
            nodeData.main = true;
            nodeData.isRoot = true;
            root = nodeData;
        }
        return nodeData;
    }
    list.forEach((n, i) => {
        var data = transfer(n, i);
        if (!obj[n.id]) {
            obj[n.id] = data;
        }
        if (obj[n.pid]) {
            obj[n.pid].children.push(data);
        }
    });
    return root;
}
function transferData(data, parentId, list, mainFlag) {
    var text = '';
    if (data.title) {
        text = data.title;
    }
    var node = {
        id: data.id,
        pid: parentId,
        text: text,
        //  percent:data.data.progress<=8?data.data.progress*10:'',
        // priority:data.data.priority,
        //link:data.href,
        note: '',
        //tag:data.data.resource
        marks: [],
        // resource:data.data.resource,
        expanded: true,
        image: '',
        imageName: '',
        x: 0,
        y: 0
    };
    if (!parentId) {
        node.layout = {};
        node.layout.layoutName = "mindmap";
        node.layout.direct = "right";
        if (mainFlag) {
            node.isRoot = true;
            node.main = true;
            node.x = canvasWidth / 2;
            node.y = canvasHeight / 2;
        }
    }
    if (data.href) {
        node.link = data.href;
    }
    if (data.notes) {
        node.note = data.notes.plain.content.trim();
    }
    // if(data.image){
    //     node.isImageNode=true;
    //     node.image='';
    //     node.imageName=data.image.src.replace('xap:resources/','');
    // }
    if (data.labels) {
        node.marks = [];
        data.labels.forEach((lab) => {
            node.marks.push({
                id: uuid(),
                text: lab,
                fill: color[parseInt(Math.random() * color.length + '')]
            });
        });
    }
    if (data.markers) {
        data.markers.forEach((item) => {
            if (item.markerId.indexOf('priority') > -1) {
                node.priority = item.markerId.split('-')[1];
            }
            if (item.markerId.indexOf('task') > -1) {
                node.percent = task[item.markerId];
            }
        });
    }
    list.push(node);
    data.children && data.children.attached && data.children.attached.forEach(c => {
        transferData(c, data.id, list);
    });
    //induce
    data.summaries && data.summaries.forEach((sum) => {
        var r = sum.range.substring(1, sum.range.length - 1);
        // console.log(r,'induce');
        var s = r.split(',')[0];
        var e = r.split(',')[1];
        var induceData = {
            induceData: {
                nodeId: sum.topicId,
                range: r,
                id: sum.id,
            }
        };
        data.children.attached.forEach((c, i) => {
            if (i == s) {
                induceData.induceData.nodeId = c.id;
            }
            if (i == e) {
                induceData.induceData.endNodeId = c.id;
            }
        });
        var mData = [];
        var summary = data.children.summary;
        var sumData = summary.filter((item) => {
            return item.id == sum.topicId;
        })[0];
        transferData(sumData, null, mData);
        mData[0].nodeType = 'induce';
        induceData.mindData = mData;
        mind.induceData.push(induceData);
    });
    //wireframe
    data.boundaries && data.boundaries.forEach(bum => {
        var r = bum.range.substring(1, bum.range.length - 1);
        var s = r.split(',')[0];
        var e = r.split(',')[1];
        var wf = {
            stroke: "rgb(206, 214, 218)",
            fill: "transparent",
            lineDash: [6, 2],
            radius: 10,
            data: {
                text: '',
                nodeType: 'wireFrame'
            }
        };
        if (bum.title) {
            wf.data = {
                text: bum.title,
                nodeType: 'wireFrame'
            };
        }
        data.children.attached.forEach((c, i) => {
            if (i == s) {
                wf.nodeId = c.id;
            }
            if (i == e) {
                wf.endNodeId = c.id;
            }
        });
        wf.range = r;
        mind.wireFrameData.push(wf);
    });
    //collout
    data.children && data.children.callout && data.children.callout.forEach(c => {
        var callout = {
            nodeId: data.id,
            color: '#f06',
            rootData: {
                text: c.title,
                id: c.id
            }
        };
        mind.calloutData.push(callout);
    });
}

/*!

JSZip v3.10.1 - A JavaScript class for generating and reading zip files
<http://stuartk.com/jszip>

(c) 2009-2016 Stuart Knightley <stuart [at] stuartk.com>
Dual licenced under the MIT license or GPLv3. See https://raw.github.com/Stuk/jszip/main/LICENSE.markdown.

JSZip uses the library pako released under the MIT license :
https://github.com/nodeca/pako/blob/main/LICENSE
*/

var jszip_min = createCommonjsModule(function (module, exports) {
!function(e){module.exports=e();}(function(){return function s(a,o,h){function u(r,e){if(!o[r]){if(!a[r]){var t="function"==typeof commonjsRequire&&commonjsRequire;if(!e&&t)return t(r,!0);if(l)return l(r,!0);var n=new Error("Cannot find module '"+r+"'");throw n.code="MODULE_NOT_FOUND",n}var i=o[r]={exports:{}};a[r][0].call(i.exports,function(e){var t=a[r][1][e];return u(t||e)},i,i.exports,s,a,o,h);}return o[r].exports}for(var l="function"==typeof commonjsRequire&&commonjsRequire,e=0;e<h.length;e++)u(h[e]);return u}({1:[function(e,t,r){var d=e("./utils"),c=e("./support"),p="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";r.encode=function(e){for(var t,r,n,i,s,a,o,h=[],u=0,l=e.length,f=l,c="string"!==d.getTypeOf(e);u<e.length;)f=l-u,n=c?(t=e[u++],r=u<l?e[u++]:0,u<l?e[u++]:0):(t=e.charCodeAt(u++),r=u<l?e.charCodeAt(u++):0,u<l?e.charCodeAt(u++):0),i=t>>2,s=(3&t)<<4|r>>4,a=1<f?(15&r)<<2|n>>6:64,o=2<f?63&n:64,h.push(p.charAt(i)+p.charAt(s)+p.charAt(a)+p.charAt(o));return h.join("")},r.decode=function(e){var t,r,n,i,s,a,o=0,h=0,u="data:";if(e.substr(0,u.length)===u)throw new Error("Invalid base64 input, it looks like a data url.");var l,f=3*(e=e.replace(/[^A-Za-z0-9+/=]/g,"")).length/4;if(e.charAt(e.length-1)===p.charAt(64)&&f--,e.charAt(e.length-2)===p.charAt(64)&&f--,f%1!=0)throw new Error("Invalid base64 input, bad content length.");for(l=c.uint8array?new Uint8Array(0|f):new Array(0|f);o<e.length;)t=p.indexOf(e.charAt(o++))<<2|(i=p.indexOf(e.charAt(o++)))>>4,r=(15&i)<<4|(s=p.indexOf(e.charAt(o++)))>>2,n=(3&s)<<6|(a=p.indexOf(e.charAt(o++))),l[h++]=t,64!==s&&(l[h++]=r),64!==a&&(l[h++]=n);return l};},{"./support":30,"./utils":32}],2:[function(e,t,r){var n=e("./external"),i=e("./stream/DataWorker"),s=e("./stream/Crc32Probe"),a=e("./stream/DataLengthProbe");function o(e,t,r,n,i){this.compressedSize=e,this.uncompressedSize=t,this.crc32=r,this.compression=n,this.compressedContent=i;}o.prototype={getContentWorker:function(){var e=new i(n.Promise.resolve(this.compressedContent)).pipe(this.compression.uncompressWorker()).pipe(new a("data_length")),t=this;return e.on("end",function(){if(this.streamInfo.data_length!==t.uncompressedSize)throw new Error("Bug : uncompressed data size mismatch")}),e},getCompressedWorker:function(){return new i(n.Promise.resolve(this.compressedContent)).withStreamInfo("compressedSize",this.compressedSize).withStreamInfo("uncompressedSize",this.uncompressedSize).withStreamInfo("crc32",this.crc32).withStreamInfo("compression",this.compression)}},o.createWorkerFrom=function(e,t,r){return e.pipe(new s).pipe(new a("uncompressedSize")).pipe(t.compressWorker(r)).pipe(new a("compressedSize")).withStreamInfo("compression",t)},t.exports=o;},{"./external":6,"./stream/Crc32Probe":25,"./stream/DataLengthProbe":26,"./stream/DataWorker":27}],3:[function(e,t,r){var n=e("./stream/GenericWorker");r.STORE={magic:"\0\0",compressWorker:function(){return new n("STORE compression")},uncompressWorker:function(){return new n("STORE decompression")}},r.DEFLATE=e("./flate");},{"./flate":7,"./stream/GenericWorker":28}],4:[function(e,t,r){var n=e("./utils");var o=function(){for(var e,t=[],r=0;r<256;r++){e=r;for(var n=0;n<8;n++)e=1&e?3988292384^e>>>1:e>>>1;t[r]=e;}return t}();t.exports=function(e,t){return void 0!==e&&e.length?"string"!==n.getTypeOf(e)?function(e,t,r,n){var i=o,s=n+r;e^=-1;for(var a=n;a<s;a++)e=e>>>8^i[255&(e^t[a])];return -1^e}(0|t,e,e.length,0):function(e,t,r,n){var i=o,s=n+r;e^=-1;for(var a=n;a<s;a++)e=e>>>8^i[255&(e^t.charCodeAt(a))];return -1^e}(0|t,e,e.length,0):0};},{"./utils":32}],5:[function(e,t,r){r.base64=!1,r.binary=!1,r.dir=!1,r.createFolders=!0,r.date=null,r.compression=null,r.compressionOptions=null,r.comment=null,r.unixPermissions=null,r.dosPermissions=null;},{}],6:[function(e,t,r){var n=null;n="undefined"!=typeof Promise?Promise:e("lie"),t.exports={Promise:n};},{lie:37}],7:[function(e,t,r){var n="undefined"!=typeof Uint8Array&&"undefined"!=typeof Uint16Array&&"undefined"!=typeof Uint32Array,i=e("pako"),s=e("./utils"),a=e("./stream/GenericWorker"),o=n?"uint8array":"array";function h(e,t){a.call(this,"FlateWorker/"+e),this._pako=null,this._pakoAction=e,this._pakoOptions=t,this.meta={};}r.magic="\b\0",s.inherits(h,a),h.prototype.processChunk=function(e){this.meta=e.meta,null===this._pako&&this._createPako(),this._pako.push(s.transformTo(o,e.data),!1);},h.prototype.flush=function(){a.prototype.flush.call(this),null===this._pako&&this._createPako(),this._pako.push([],!0);},h.prototype.cleanUp=function(){a.prototype.cleanUp.call(this),this._pako=null;},h.prototype._createPako=function(){this._pako=new i[this._pakoAction]({raw:!0,level:this._pakoOptions.level||-1});var t=this;this._pako.onData=function(e){t.push({data:e,meta:t.meta});};},r.compressWorker=function(e){return new h("Deflate",e)},r.uncompressWorker=function(){return new h("Inflate",{})};},{"./stream/GenericWorker":28,"./utils":32,pako:38}],8:[function(e,t,r){function A(e,t){var r,n="";for(r=0;r<t;r++)n+=String.fromCharCode(255&e),e>>>=8;return n}function n(e,t,r,n,i,s){var a,o,h=e.file,u=e.compression,l=s!==O.utf8encode,f=I.transformTo("string",s(h.name)),c=I.transformTo("string",O.utf8encode(h.name)),d=h.comment,p=I.transformTo("string",s(d)),m=I.transformTo("string",O.utf8encode(d)),_=c.length!==h.name.length,g=m.length!==d.length,b="",v="",y="",w=h.dir,k=h.date,x={crc32:0,compressedSize:0,uncompressedSize:0};t&&!r||(x.crc32=e.crc32,x.compressedSize=e.compressedSize,x.uncompressedSize=e.uncompressedSize);var S=0;t&&(S|=8),l||!_&&!g||(S|=2048);var z=0,C=0;w&&(z|=16),"UNIX"===i?(C=798,z|=function(e,t){var r=e;return e||(r=t?16893:33204),(65535&r)<<16}(h.unixPermissions,w)):(C=20,z|=function(e){return 63&(e||0)}(h.dosPermissions)),a=k.getUTCHours(),a<<=6,a|=k.getUTCMinutes(),a<<=5,a|=k.getUTCSeconds()/2,o=k.getUTCFullYear()-1980,o<<=4,o|=k.getUTCMonth()+1,o<<=5,o|=k.getUTCDate(),_&&(v=A(1,1)+A(B(f),4)+c,b+="up"+A(v.length,2)+v),g&&(y=A(1,1)+A(B(p),4)+m,b+="uc"+A(y.length,2)+y);var E="";return E+="\n\0",E+=A(S,2),E+=u.magic,E+=A(a,2),E+=A(o,2),E+=A(x.crc32,4),E+=A(x.compressedSize,4),E+=A(x.uncompressedSize,4),E+=A(f.length,2),E+=A(b.length,2),{fileRecord:R.LOCAL_FILE_HEADER+E+f+b,dirRecord:R.CENTRAL_FILE_HEADER+A(C,2)+E+A(p.length,2)+"\0\0\0\0"+A(z,4)+A(n,4)+f+b+p}}var I=e("../utils"),i=e("../stream/GenericWorker"),O=e("../utf8"),B=e("../crc32"),R=e("../signature");function s(e,t,r,n){i.call(this,"ZipFileWorker"),this.bytesWritten=0,this.zipComment=t,this.zipPlatform=r,this.encodeFileName=n,this.streamFiles=e,this.accumulate=!1,this.contentBuffer=[],this.dirRecords=[],this.currentSourceOffset=0,this.entriesCount=0,this.currentFile=null,this._sources=[];}I.inherits(s,i),s.prototype.push=function(e){var t=e.meta.percent||0,r=this.entriesCount,n=this._sources.length;this.accumulate?this.contentBuffer.push(e):(this.bytesWritten+=e.data.length,i.prototype.push.call(this,{data:e.data,meta:{currentFile:this.currentFile,percent:r?(t+100*(r-n-1))/r:100}}));},s.prototype.openedSource=function(e){this.currentSourceOffset=this.bytesWritten,this.currentFile=e.file.name;var t=this.streamFiles&&!e.file.dir;if(t){var r=n(e,t,!1,this.currentSourceOffset,this.zipPlatform,this.encodeFileName);this.push({data:r.fileRecord,meta:{percent:0}});}else this.accumulate=!0;},s.prototype.closedSource=function(e){this.accumulate=!1;var t=this.streamFiles&&!e.file.dir,r=n(e,t,!0,this.currentSourceOffset,this.zipPlatform,this.encodeFileName);if(this.dirRecords.push(r.dirRecord),t)this.push({data:function(e){return R.DATA_DESCRIPTOR+A(e.crc32,4)+A(e.compressedSize,4)+A(e.uncompressedSize,4)}(e),meta:{percent:100}});else for(this.push({data:r.fileRecord,meta:{percent:0}});this.contentBuffer.length;)this.push(this.contentBuffer.shift());this.currentFile=null;},s.prototype.flush=function(){for(var e=this.bytesWritten,t=0;t<this.dirRecords.length;t++)this.push({data:this.dirRecords[t],meta:{percent:100}});var r=this.bytesWritten-e,n=function(e,t,r,n,i){var s=I.transformTo("string",i(n));return R.CENTRAL_DIRECTORY_END+"\0\0\0\0"+A(e,2)+A(e,2)+A(t,4)+A(r,4)+A(s.length,2)+s}(this.dirRecords.length,r,e,this.zipComment,this.encodeFileName);this.push({data:n,meta:{percent:100}});},s.prototype.prepareNextSource=function(){this.previous=this._sources.shift(),this.openedSource(this.previous.streamInfo),this.isPaused?this.previous.pause():this.previous.resume();},s.prototype.registerPrevious=function(e){this._sources.push(e);var t=this;return e.on("data",function(e){t.processChunk(e);}),e.on("end",function(){t.closedSource(t.previous.streamInfo),t._sources.length?t.prepareNextSource():t.end();}),e.on("error",function(e){t.error(e);}),this},s.prototype.resume=function(){return !!i.prototype.resume.call(this)&&(!this.previous&&this._sources.length?(this.prepareNextSource(),!0):this.previous||this._sources.length||this.generatedError?void 0:(this.end(),!0))},s.prototype.error=function(e){var t=this._sources;if(!i.prototype.error.call(this,e))return !1;for(var r=0;r<t.length;r++)try{t[r].error(e);}catch(e){}return !0},s.prototype.lock=function(){i.prototype.lock.call(this);for(var e=this._sources,t=0;t<e.length;t++)e[t].lock();},t.exports=s;},{"../crc32":4,"../signature":23,"../stream/GenericWorker":28,"../utf8":31,"../utils":32}],9:[function(e,t,r){var u=e("../compressions"),n=e("./ZipFileWorker");r.generateWorker=function(e,a,t){var o=new n(a.streamFiles,t,a.platform,a.encodeFileName),h=0;try{e.forEach(function(e,t){h++;var r=function(e,t){var r=e||t,n=u[r];if(!n)throw new Error(r+" is not a valid compression method !");return n}(t.options.compression,a.compression),n=t.options.compressionOptions||a.compressionOptions||{},i=t.dir,s=t.date;t._compressWorker(r,n).withStreamInfo("file",{name:e,dir:i,date:s,comment:t.comment||"",unixPermissions:t.unixPermissions,dosPermissions:t.dosPermissions}).pipe(o);}),o.entriesCount=h;}catch(e){o.error(e);}return o};},{"../compressions":3,"./ZipFileWorker":8}],10:[function(e,t,r){function n(){if(!(this instanceof n))return new n;if(arguments.length)throw new Error("The constructor with parameters has been removed in JSZip 3.0, please check the upgrade guide.");this.files=Object.create(null),this.comment=null,this.root="",this.clone=function(){var e=new n;for(var t in this)"function"!=typeof this[t]&&(e[t]=this[t]);return e};}(n.prototype=e("./object")).loadAsync=e("./load"),n.support=e("./support"),n.defaults=e("./defaults"),n.version="3.10.1",n.loadAsync=function(e,t){return (new n).loadAsync(e,t)},n.external=e("./external"),t.exports=n;},{"./defaults":5,"./external":6,"./load":11,"./object":15,"./support":30}],11:[function(e,t,r){var u=e("./utils"),i=e("./external"),n=e("./utf8"),s=e("./zipEntries"),a=e("./stream/Crc32Probe"),l=e("./nodejsUtils");function f(n){return new i.Promise(function(e,t){var r=n.decompressed.getContentWorker().pipe(new a);r.on("error",function(e){t(e);}).on("end",function(){r.streamInfo.crc32!==n.decompressed.crc32?t(new Error("Corrupted zip : CRC32 mismatch")):e();}).resume();})}t.exports=function(e,o){var h=this;return o=u.extend(o||{},{base64:!1,checkCRC32:!1,optimizedBinaryString:!1,createFolders:!1,decodeFileName:n.utf8decode}),l.isNode&&l.isStream(e)?i.Promise.reject(new Error("JSZip can't accept a stream when loading a zip file.")):u.prepareContent("the loaded zip file",e,!0,o.optimizedBinaryString,o.base64).then(function(e){var t=new s(o);return t.load(e),t}).then(function(e){var t=[i.Promise.resolve(e)],r=e.files;if(o.checkCRC32)for(var n=0;n<r.length;n++)t.push(f(r[n]));return i.Promise.all(t)}).then(function(e){for(var t=e.shift(),r=t.files,n=0;n<r.length;n++){var i=r[n],s=i.fileNameStr,a=u.resolve(i.fileNameStr);h.file(a,i.decompressed,{binary:!0,optimizedBinaryString:!0,date:i.date,dir:i.dir,comment:i.fileCommentStr.length?i.fileCommentStr:null,unixPermissions:i.unixPermissions,dosPermissions:i.dosPermissions,createFolders:o.createFolders}),i.dir||(h.file(a).unsafeOriginalName=s);}return t.zipComment.length&&(h.comment=t.zipComment),h})};},{"./external":6,"./nodejsUtils":14,"./stream/Crc32Probe":25,"./utf8":31,"./utils":32,"./zipEntries":33}],12:[function(e,t,r){var n=e("../utils"),i=e("../stream/GenericWorker");function s(e,t){i.call(this,"Nodejs stream input adapter for "+e),this._upstreamEnded=!1,this._bindStream(t);}n.inherits(s,i),s.prototype._bindStream=function(e){var t=this;(this._stream=e).pause(),e.on("data",function(e){t.push({data:e,meta:{percent:0}});}).on("error",function(e){t.isPaused?this.generatedError=e:t.error(e);}).on("end",function(){t.isPaused?t._upstreamEnded=!0:t.end();});},s.prototype.pause=function(){return !!i.prototype.pause.call(this)&&(this._stream.pause(),!0)},s.prototype.resume=function(){return !!i.prototype.resume.call(this)&&(this._upstreamEnded?this.end():this._stream.resume(),!0)},t.exports=s;},{"../stream/GenericWorker":28,"../utils":32}],13:[function(e,t,r){var i=e("readable-stream").Readable;function n(e,t,r){i.call(this,t),this._helper=e;var n=this;e.on("data",function(e,t){n.push(e)||n._helper.pause(),r&&r(t);}).on("error",function(e){n.emit("error",e);}).on("end",function(){n.push(null);});}e("../utils").inherits(n,i),n.prototype._read=function(){this._helper.resume();},t.exports=n;},{"../utils":32,"readable-stream":16}],14:[function(e,t,r){t.exports={isNode:"undefined"!=typeof Buffer,newBufferFrom:function(e,t){if(Buffer.from&&Buffer.from!==Uint8Array.from)return Buffer.from(e,t);if("number"==typeof e)throw new Error('The "data" argument must not be a number');return new Buffer(e,t)},allocBuffer:function(e){if(Buffer.alloc)return Buffer.alloc(e);var t=new Buffer(e);return t.fill(0),t},isBuffer:function(e){return Buffer.isBuffer(e)},isStream:function(e){return e&&"function"==typeof e.on&&"function"==typeof e.pause&&"function"==typeof e.resume}};},{}],15:[function(e,t,r){function s(e,t,r){var n,i=u.getTypeOf(t),s=u.extend(r||{},f);s.date=s.date||new Date,null!==s.compression&&(s.compression=s.compression.toUpperCase()),"string"==typeof s.unixPermissions&&(s.unixPermissions=parseInt(s.unixPermissions,8)),s.unixPermissions&&16384&s.unixPermissions&&(s.dir=!0),s.dosPermissions&&16&s.dosPermissions&&(s.dir=!0),s.dir&&(e=g(e)),s.createFolders&&(n=_(e))&&b.call(this,n,!0);var a="string"===i&&!1===s.binary&&!1===s.base64;r&&void 0!==r.binary||(s.binary=!a),(t instanceof c&&0===t.uncompressedSize||s.dir||!t||0===t.length)&&(s.base64=!1,s.binary=!0,t="",s.compression="STORE",i="string");var o=null;o=t instanceof c||t instanceof l?t:p.isNode&&p.isStream(t)?new m(e,t):u.prepareContent(e,t,s.binary,s.optimizedBinaryString,s.base64);var h=new d(e,o,s);this.files[e]=h;}var i=e("./utf8"),u=e("./utils"),l=e("./stream/GenericWorker"),a=e("./stream/StreamHelper"),f=e("./defaults"),c=e("./compressedObject"),d=e("./zipObject"),o=e("./generate"),p=e("./nodejsUtils"),m=e("./nodejs/NodejsStreamInputAdapter"),_=function(e){"/"===e.slice(-1)&&(e=e.substring(0,e.length-1));var t=e.lastIndexOf("/");return 0<t?e.substring(0,t):""},g=function(e){return "/"!==e.slice(-1)&&(e+="/"),e},b=function(e,t){return t=void 0!==t?t:f.createFolders,e=g(e),this.files[e]||s.call(this,e,null,{dir:!0,createFolders:t}),this.files[e]};function h(e){return "[object RegExp]"===Object.prototype.toString.call(e)}var n={load:function(){throw new Error("This method has been removed in JSZip 3.0, please check the upgrade guide.")},forEach:function(e){var t,r,n;for(t in this.files)n=this.files[t],(r=t.slice(this.root.length,t.length))&&t.slice(0,this.root.length)===this.root&&e(r,n);},filter:function(r){var n=[];return this.forEach(function(e,t){r(e,t)&&n.push(t);}),n},file:function(e,t,r){if(1!==arguments.length)return e=this.root+e,s.call(this,e,t,r),this;if(h(e)){var n=e;return this.filter(function(e,t){return !t.dir&&n.test(e)})}var i=this.files[this.root+e];return i&&!i.dir?i:null},folder:function(r){if(!r)return this;if(h(r))return this.filter(function(e,t){return t.dir&&r.test(e)});var e=this.root+r,t=b.call(this,e),n=this.clone();return n.root=t.name,n},remove:function(r){r=this.root+r;var e=this.files[r];if(e||("/"!==r.slice(-1)&&(r+="/"),e=this.files[r]),e&&!e.dir)delete this.files[r];else for(var t=this.filter(function(e,t){return t.name.slice(0,r.length)===r}),n=0;n<t.length;n++)delete this.files[t[n].name];return this},generate:function(){throw new Error("This method has been removed in JSZip 3.0, please check the upgrade guide.")},generateInternalStream:function(e){var t,r={};try{if((r=u.extend(e||{},{streamFiles:!1,compression:"STORE",compressionOptions:null,type:"",platform:"DOS",comment:null,mimeType:"application/zip",encodeFileName:i.utf8encode})).type=r.type.toLowerCase(),r.compression=r.compression.toUpperCase(),"binarystring"===r.type&&(r.type="string"),!r.type)throw new Error("No output type specified.");u.checkSupport(r.type),"darwin"!==r.platform&&"freebsd"!==r.platform&&"linux"!==r.platform&&"sunos"!==r.platform||(r.platform="UNIX"),"win32"===r.platform&&(r.platform="DOS");var n=r.comment||this.comment||"";t=o.generateWorker(this,r,n);}catch(e){(t=new l("error")).error(e);}return new a(t,r.type||"string",r.mimeType)},generateAsync:function(e,t){return this.generateInternalStream(e).accumulate(t)},generateNodeStream:function(e,t){return (e=e||{}).type||(e.type="nodebuffer"),this.generateInternalStream(e).toNodejsStream(t)}};t.exports=n;},{"./compressedObject":2,"./defaults":5,"./generate":9,"./nodejs/NodejsStreamInputAdapter":12,"./nodejsUtils":14,"./stream/GenericWorker":28,"./stream/StreamHelper":29,"./utf8":31,"./utils":32,"./zipObject":35}],16:[function(e,t,r){t.exports=e("stream");},{stream:void 0}],17:[function(e,t,r){var n=e("./DataReader");function i(e){n.call(this,e);for(var t=0;t<this.data.length;t++)e[t]=255&e[t];}e("../utils").inherits(i,n),i.prototype.byteAt=function(e){return this.data[this.zero+e]},i.prototype.lastIndexOfSignature=function(e){for(var t=e.charCodeAt(0),r=e.charCodeAt(1),n=e.charCodeAt(2),i=e.charCodeAt(3),s=this.length-4;0<=s;--s)if(this.data[s]===t&&this.data[s+1]===r&&this.data[s+2]===n&&this.data[s+3]===i)return s-this.zero;return -1},i.prototype.readAndCheckSignature=function(e){var t=e.charCodeAt(0),r=e.charCodeAt(1),n=e.charCodeAt(2),i=e.charCodeAt(3),s=this.readData(4);return t===s[0]&&r===s[1]&&n===s[2]&&i===s[3]},i.prototype.readData=function(e){if(this.checkOffset(e),0===e)return [];var t=this.data.slice(this.zero+this.index,this.zero+this.index+e);return this.index+=e,t},t.exports=i;},{"../utils":32,"./DataReader":18}],18:[function(e,t,r){var n=e("../utils");function i(e){this.data=e,this.length=e.length,this.index=0,this.zero=0;}i.prototype={checkOffset:function(e){this.checkIndex(this.index+e);},checkIndex:function(e){if(this.length<this.zero+e||e<0)throw new Error("End of data reached (data length = "+this.length+", asked index = "+e+"). Corrupted zip ?")},setIndex:function(e){this.checkIndex(e),this.index=e;},skip:function(e){this.setIndex(this.index+e);},byteAt:function(){},readInt:function(e){var t,r=0;for(this.checkOffset(e),t=this.index+e-1;t>=this.index;t--)r=(r<<8)+this.byteAt(t);return this.index+=e,r},readString:function(e){return n.transformTo("string",this.readData(e))},readData:function(){},lastIndexOfSignature:function(){},readAndCheckSignature:function(){},readDate:function(){var e=this.readInt(4);return new Date(Date.UTC(1980+(e>>25&127),(e>>21&15)-1,e>>16&31,e>>11&31,e>>5&63,(31&e)<<1))}},t.exports=i;},{"../utils":32}],19:[function(e,t,r){var n=e("./Uint8ArrayReader");function i(e){n.call(this,e);}e("../utils").inherits(i,n),i.prototype.readData=function(e){this.checkOffset(e);var t=this.data.slice(this.zero+this.index,this.zero+this.index+e);return this.index+=e,t},t.exports=i;},{"../utils":32,"./Uint8ArrayReader":21}],20:[function(e,t,r){var n=e("./DataReader");function i(e){n.call(this,e);}e("../utils").inherits(i,n),i.prototype.byteAt=function(e){return this.data.charCodeAt(this.zero+e)},i.prototype.lastIndexOfSignature=function(e){return this.data.lastIndexOf(e)-this.zero},i.prototype.readAndCheckSignature=function(e){return e===this.readData(4)},i.prototype.readData=function(e){this.checkOffset(e);var t=this.data.slice(this.zero+this.index,this.zero+this.index+e);return this.index+=e,t},t.exports=i;},{"../utils":32,"./DataReader":18}],21:[function(e,t,r){var n=e("./ArrayReader");function i(e){n.call(this,e);}e("../utils").inherits(i,n),i.prototype.readData=function(e){if(this.checkOffset(e),0===e)return new Uint8Array(0);var t=this.data.subarray(this.zero+this.index,this.zero+this.index+e);return this.index+=e,t},t.exports=i;},{"../utils":32,"./ArrayReader":17}],22:[function(e,t,r){var n=e("../utils"),i=e("../support"),s=e("./ArrayReader"),a=e("./StringReader"),o=e("./NodeBufferReader"),h=e("./Uint8ArrayReader");t.exports=function(e){var t=n.getTypeOf(e);return n.checkSupport(t),"string"!==t||i.uint8array?"nodebuffer"===t?new o(e):i.uint8array?new h(n.transformTo("uint8array",e)):new s(n.transformTo("array",e)):new a(e)};},{"../support":30,"../utils":32,"./ArrayReader":17,"./NodeBufferReader":19,"./StringReader":20,"./Uint8ArrayReader":21}],23:[function(e,t,r){r.LOCAL_FILE_HEADER="PK",r.CENTRAL_FILE_HEADER="PK",r.CENTRAL_DIRECTORY_END="PK",r.ZIP64_CENTRAL_DIRECTORY_LOCATOR="PK",r.ZIP64_CENTRAL_DIRECTORY_END="PK",r.DATA_DESCRIPTOR="PK\b";},{}],24:[function(e,t,r){var n=e("./GenericWorker"),i=e("../utils");function s(e){n.call(this,"ConvertWorker to "+e),this.destType=e;}i.inherits(s,n),s.prototype.processChunk=function(e){this.push({data:i.transformTo(this.destType,e.data),meta:e.meta});},t.exports=s;},{"../utils":32,"./GenericWorker":28}],25:[function(e,t,r){var n=e("./GenericWorker"),i=e("../crc32");function s(){n.call(this,"Crc32Probe"),this.withStreamInfo("crc32",0);}e("../utils").inherits(s,n),s.prototype.processChunk=function(e){this.streamInfo.crc32=i(e.data,this.streamInfo.crc32||0),this.push(e);},t.exports=s;},{"../crc32":4,"../utils":32,"./GenericWorker":28}],26:[function(e,t,r){var n=e("../utils"),i=e("./GenericWorker");function s(e){i.call(this,"DataLengthProbe for "+e),this.propName=e,this.withStreamInfo(e,0);}n.inherits(s,i),s.prototype.processChunk=function(e){if(e){var t=this.streamInfo[this.propName]||0;this.streamInfo[this.propName]=t+e.data.length;}i.prototype.processChunk.call(this,e);},t.exports=s;},{"../utils":32,"./GenericWorker":28}],27:[function(e,t,r){var n=e("../utils"),i=e("./GenericWorker");function s(e){i.call(this,"DataWorker");var t=this;this.dataIsReady=!1,this.index=0,this.max=0,this.data=null,this.type="",this._tickScheduled=!1,e.then(function(e){t.dataIsReady=!0,t.data=e,t.max=e&&e.length||0,t.type=n.getTypeOf(e),t.isPaused||t._tickAndRepeat();},function(e){t.error(e);});}n.inherits(s,i),s.prototype.cleanUp=function(){i.prototype.cleanUp.call(this),this.data=null;},s.prototype.resume=function(){return !!i.prototype.resume.call(this)&&(!this._tickScheduled&&this.dataIsReady&&(this._tickScheduled=!0,n.delay(this._tickAndRepeat,[],this)),!0)},s.prototype._tickAndRepeat=function(){this._tickScheduled=!1,this.isPaused||this.isFinished||(this._tick(),this.isFinished||(n.delay(this._tickAndRepeat,[],this),this._tickScheduled=!0));},s.prototype._tick=function(){if(this.isPaused||this.isFinished)return !1;var e=null,t=Math.min(this.max,this.index+16384);if(this.index>=this.max)return this.end();switch(this.type){case"string":e=this.data.substring(this.index,t);break;case"uint8array":e=this.data.subarray(this.index,t);break;case"array":case"nodebuffer":e=this.data.slice(this.index,t);}return this.index=t,this.push({data:e,meta:{percent:this.max?this.index/this.max*100:0}})},t.exports=s;},{"../utils":32,"./GenericWorker":28}],28:[function(e,t,r){function n(e){this.name=e||"default",this.streamInfo={},this.generatedError=null,this.extraStreamInfo={},this.isPaused=!0,this.isFinished=!1,this.isLocked=!1,this._listeners={data:[],end:[],error:[]},this.previous=null;}n.prototype={push:function(e){this.emit("data",e);},end:function(){if(this.isFinished)return !1;this.flush();try{this.emit("end"),this.cleanUp(),this.isFinished=!0;}catch(e){this.emit("error",e);}return !0},error:function(e){return !this.isFinished&&(this.isPaused?this.generatedError=e:(this.isFinished=!0,this.emit("error",e),this.previous&&this.previous.error(e),this.cleanUp()),!0)},on:function(e,t){return this._listeners[e].push(t),this},cleanUp:function(){this.streamInfo=this.generatedError=this.extraStreamInfo=null,this._listeners=[];},emit:function(e,t){if(this._listeners[e])for(var r=0;r<this._listeners[e].length;r++)this._listeners[e][r].call(this,t);},pipe:function(e){return e.registerPrevious(this)},registerPrevious:function(e){if(this.isLocked)throw new Error("The stream '"+this+"' has already been used.");this.streamInfo=e.streamInfo,this.mergeStreamInfo(),this.previous=e;var t=this;return e.on("data",function(e){t.processChunk(e);}),e.on("end",function(){t.end();}),e.on("error",function(e){t.error(e);}),this},pause:function(){return !this.isPaused&&!this.isFinished&&(this.isPaused=!0,this.previous&&this.previous.pause(),!0)},resume:function(){if(!this.isPaused||this.isFinished)return !1;var e=this.isPaused=!1;return this.generatedError&&(this.error(this.generatedError),e=!0),this.previous&&this.previous.resume(),!e},flush:function(){},processChunk:function(e){this.push(e);},withStreamInfo:function(e,t){return this.extraStreamInfo[e]=t,this.mergeStreamInfo(),this},mergeStreamInfo:function(){for(var e in this.extraStreamInfo)Object.prototype.hasOwnProperty.call(this.extraStreamInfo,e)&&(this.streamInfo[e]=this.extraStreamInfo[e]);},lock:function(){if(this.isLocked)throw new Error("The stream '"+this+"' has already been used.");this.isLocked=!0,this.previous&&this.previous.lock();},toString:function(){var e="Worker "+this.name;return this.previous?this.previous+" -> "+e:e}},t.exports=n;},{}],29:[function(e,t,r){var h=e("../utils"),i=e("./ConvertWorker"),s=e("./GenericWorker"),u=e("../base64"),n=e("../support"),a=e("../external"),o=null;if(n.nodestream)try{o=e("../nodejs/NodejsStreamOutputAdapter");}catch(e){}function l(e,o){return new a.Promise(function(t,r){var n=[],i=e._internalType,s=e._outputType,a=e._mimeType;e.on("data",function(e,t){n.push(e),o&&o(t);}).on("error",function(e){n=[],r(e);}).on("end",function(){try{var e=function(e,t,r){switch(e){case"blob":return h.newBlob(h.transformTo("arraybuffer",t),r);case"base64":return u.encode(t);default:return h.transformTo(e,t)}}(s,function(e,t){var r,n=0,i=null,s=0;for(r=0;r<t.length;r++)s+=t[r].length;switch(e){case"string":return t.join("");case"array":return Array.prototype.concat.apply([],t);case"uint8array":for(i=new Uint8Array(s),r=0;r<t.length;r++)i.set(t[r],n),n+=t[r].length;return i;case"nodebuffer":return Buffer.concat(t);default:throw new Error("concat : unsupported type '"+e+"'")}}(i,n),a);t(e);}catch(e){r(e);}n=[];}).resume();})}function f(e,t,r){var n=t;switch(t){case"blob":case"arraybuffer":n="uint8array";break;case"base64":n="string";}try{this._internalType=n,this._outputType=t,this._mimeType=r,h.checkSupport(n),this._worker=e.pipe(new i(n)),e.lock();}catch(e){this._worker=new s("error"),this._worker.error(e);}}f.prototype={accumulate:function(e){return l(this,e)},on:function(e,t){var r=this;return "data"===e?this._worker.on(e,function(e){t.call(r,e.data,e.meta);}):this._worker.on(e,function(){h.delay(t,arguments,r);}),this},resume:function(){return h.delay(this._worker.resume,[],this._worker),this},pause:function(){return this._worker.pause(),this},toNodejsStream:function(e){if(h.checkSupport("nodestream"),"nodebuffer"!==this._outputType)throw new Error(this._outputType+" is not supported by this method");return new o(this,{objectMode:"nodebuffer"!==this._outputType},e)}},t.exports=f;},{"../base64":1,"../external":6,"../nodejs/NodejsStreamOutputAdapter":13,"../support":30,"../utils":32,"./ConvertWorker":24,"./GenericWorker":28}],30:[function(e,t,r){if(r.base64=!0,r.array=!0,r.string=!0,r.arraybuffer="undefined"!=typeof ArrayBuffer&&"undefined"!=typeof Uint8Array,r.nodebuffer="undefined"!=typeof Buffer,r.uint8array="undefined"!=typeof Uint8Array,"undefined"==typeof ArrayBuffer)r.blob=!1;else {var n=new ArrayBuffer(0);try{r.blob=0===new Blob([n],{type:"application/zip"}).size;}catch(e){try{var i=new(self.BlobBuilder||self.WebKitBlobBuilder||self.MozBlobBuilder||self.MSBlobBuilder);i.append(n),r.blob=0===i.getBlob("application/zip").size;}catch(e){r.blob=!1;}}}try{r.nodestream=!!e("readable-stream").Readable;}catch(e){r.nodestream=!1;}},{"readable-stream":16}],31:[function(e,t,s){for(var o=e("./utils"),h=e("./support"),r=e("./nodejsUtils"),n=e("./stream/GenericWorker"),u=new Array(256),i=0;i<256;i++)u[i]=252<=i?6:248<=i?5:240<=i?4:224<=i?3:192<=i?2:1;u[254]=u[254]=1;function a(){n.call(this,"utf-8 decode"),this.leftOver=null;}function l(){n.call(this,"utf-8 encode");}s.utf8encode=function(e){return h.nodebuffer?r.newBufferFrom(e,"utf-8"):function(e){var t,r,n,i,s,a=e.length,o=0;for(i=0;i<a;i++)55296==(64512&(r=e.charCodeAt(i)))&&i+1<a&&56320==(64512&(n=e.charCodeAt(i+1)))&&(r=65536+(r-55296<<10)+(n-56320),i++),o+=r<128?1:r<2048?2:r<65536?3:4;for(t=h.uint8array?new Uint8Array(o):new Array(o),i=s=0;s<o;i++)55296==(64512&(r=e.charCodeAt(i)))&&i+1<a&&56320==(64512&(n=e.charCodeAt(i+1)))&&(r=65536+(r-55296<<10)+(n-56320),i++),r<128?t[s++]=r:(r<2048?t[s++]=192|r>>>6:(r<65536?t[s++]=224|r>>>12:(t[s++]=240|r>>>18,t[s++]=128|r>>>12&63),t[s++]=128|r>>>6&63),t[s++]=128|63&r);return t}(e)},s.utf8decode=function(e){return h.nodebuffer?o.transformTo("nodebuffer",e).toString("utf-8"):function(e){var t,r,n,i,s=e.length,a=new Array(2*s);for(t=r=0;t<s;)if((n=e[t++])<128)a[r++]=n;else if(4<(i=u[n]))a[r++]=65533,t+=i-1;else {for(n&=2===i?31:3===i?15:7;1<i&&t<s;)n=n<<6|63&e[t++],i--;1<i?a[r++]=65533:n<65536?a[r++]=n:(n-=65536,a[r++]=55296|n>>10&1023,a[r++]=56320|1023&n);}return a.length!==r&&(a.subarray?a=a.subarray(0,r):a.length=r),o.applyFromCharCode(a)}(e=o.transformTo(h.uint8array?"uint8array":"array",e))},o.inherits(a,n),a.prototype.processChunk=function(e){var t=o.transformTo(h.uint8array?"uint8array":"array",e.data);if(this.leftOver&&this.leftOver.length){if(h.uint8array){var r=t;(t=new Uint8Array(r.length+this.leftOver.length)).set(this.leftOver,0),t.set(r,this.leftOver.length);}else t=this.leftOver.concat(t);this.leftOver=null;}var n=function(e,t){var r;for((t=t||e.length)>e.length&&(t=e.length),r=t-1;0<=r&&128==(192&e[r]);)r--;return r<0?t:0===r?t:r+u[e[r]]>t?r:t}(t),i=t;n!==t.length&&(h.uint8array?(i=t.subarray(0,n),this.leftOver=t.subarray(n,t.length)):(i=t.slice(0,n),this.leftOver=t.slice(n,t.length))),this.push({data:s.utf8decode(i),meta:e.meta});},a.prototype.flush=function(){this.leftOver&&this.leftOver.length&&(this.push({data:s.utf8decode(this.leftOver),meta:{}}),this.leftOver=null);},s.Utf8DecodeWorker=a,o.inherits(l,n),l.prototype.processChunk=function(e){this.push({data:s.utf8encode(e.data),meta:e.meta});},s.Utf8EncodeWorker=l;},{"./nodejsUtils":14,"./stream/GenericWorker":28,"./support":30,"./utils":32}],32:[function(e,t,a){var o=e("./support"),h=e("./base64"),r=e("./nodejsUtils"),u=e("./external");function n(e){return e}function l(e,t){for(var r=0;r<e.length;++r)t[r]=255&e.charCodeAt(r);return t}e("setimmediate"),a.newBlob=function(t,r){a.checkSupport("blob");try{return new Blob([t],{type:r})}catch(e){try{var n=new(self.BlobBuilder||self.WebKitBlobBuilder||self.MozBlobBuilder||self.MSBlobBuilder);return n.append(t),n.getBlob(r)}catch(e){throw new Error("Bug : can't construct the Blob.")}}};var i={stringifyByChunk:function(e,t,r){var n=[],i=0,s=e.length;if(s<=r)return String.fromCharCode.apply(null,e);for(;i<s;)"array"===t||"nodebuffer"===t?n.push(String.fromCharCode.apply(null,e.slice(i,Math.min(i+r,s)))):n.push(String.fromCharCode.apply(null,e.subarray(i,Math.min(i+r,s)))),i+=r;return n.join("")},stringifyByChar:function(e){for(var t="",r=0;r<e.length;r++)t+=String.fromCharCode(e[r]);return t},applyCanBeUsed:{uint8array:function(){try{return o.uint8array&&1===String.fromCharCode.apply(null,new Uint8Array(1)).length}catch(e){return !1}}(),nodebuffer:function(){try{return o.nodebuffer&&1===String.fromCharCode.apply(null,r.allocBuffer(1)).length}catch(e){return !1}}()}};function s(e){var t=65536,r=a.getTypeOf(e),n=!0;if("uint8array"===r?n=i.applyCanBeUsed.uint8array:"nodebuffer"===r&&(n=i.applyCanBeUsed.nodebuffer),n)for(;1<t;)try{return i.stringifyByChunk(e,r,t)}catch(e){t=Math.floor(t/2);}return i.stringifyByChar(e)}function f(e,t){for(var r=0;r<e.length;r++)t[r]=e[r];return t}a.applyFromCharCode=s;var c={};c.string={string:n,array:function(e){return l(e,new Array(e.length))},arraybuffer:function(e){return c.string.uint8array(e).buffer},uint8array:function(e){return l(e,new Uint8Array(e.length))},nodebuffer:function(e){return l(e,r.allocBuffer(e.length))}},c.array={string:s,array:n,arraybuffer:function(e){return new Uint8Array(e).buffer},uint8array:function(e){return new Uint8Array(e)},nodebuffer:function(e){return r.newBufferFrom(e)}},c.arraybuffer={string:function(e){return s(new Uint8Array(e))},array:function(e){return f(new Uint8Array(e),new Array(e.byteLength))},arraybuffer:n,uint8array:function(e){return new Uint8Array(e)},nodebuffer:function(e){return r.newBufferFrom(new Uint8Array(e))}},c.uint8array={string:s,array:function(e){return f(e,new Array(e.length))},arraybuffer:function(e){return e.buffer},uint8array:n,nodebuffer:function(e){return r.newBufferFrom(e)}},c.nodebuffer={string:s,array:function(e){return f(e,new Array(e.length))},arraybuffer:function(e){return c.nodebuffer.uint8array(e).buffer},uint8array:function(e){return f(e,new Uint8Array(e.length))},nodebuffer:n},a.transformTo=function(e,t){if(t=t||"",!e)return t;a.checkSupport(e);var r=a.getTypeOf(t);return c[r][e](t)},a.resolve=function(e){for(var t=e.split("/"),r=[],n=0;n<t.length;n++){var i=t[n];"."===i||""===i&&0!==n&&n!==t.length-1||(".."===i?r.pop():r.push(i));}return r.join("/")},a.getTypeOf=function(e){return "string"==typeof e?"string":"[object Array]"===Object.prototype.toString.call(e)?"array":o.nodebuffer&&r.isBuffer(e)?"nodebuffer":o.uint8array&&e instanceof Uint8Array?"uint8array":o.arraybuffer&&e instanceof ArrayBuffer?"arraybuffer":void 0},a.checkSupport=function(e){if(!o[e.toLowerCase()])throw new Error(e+" is not supported by this platform")},a.MAX_VALUE_16BITS=65535,a.MAX_VALUE_32BITS=-1,a.pretty=function(e){var t,r,n="";for(r=0;r<(e||"").length;r++)n+="\\x"+((t=e.charCodeAt(r))<16?"0":"")+t.toString(16).toUpperCase();return n},a.delay=function(e,t,r){setImmediate(function(){e.apply(r||null,t||[]);});},a.inherits=function(e,t){function r(){}r.prototype=t.prototype,e.prototype=new r;},a.extend=function(){var e,t,r={};for(e=0;e<arguments.length;e++)for(t in arguments[e])Object.prototype.hasOwnProperty.call(arguments[e],t)&&void 0===r[t]&&(r[t]=arguments[e][t]);return r},a.prepareContent=function(r,e,n,i,s){return u.Promise.resolve(e).then(function(n){return o.blob&&(n instanceof Blob||-1!==["[object File]","[object Blob]"].indexOf(Object.prototype.toString.call(n)))&&"undefined"!=typeof FileReader?new u.Promise(function(t,r){var e=new FileReader;e.onload=function(e){t(e.target.result);},e.onerror=function(e){r(e.target.error);},e.readAsArrayBuffer(n);}):n}).then(function(e){var t=a.getTypeOf(e);return t?("arraybuffer"===t?e=a.transformTo("uint8array",e):"string"===t&&(s?e=h.decode(e):n&&!0!==i&&(e=function(e){return l(e,o.uint8array?new Uint8Array(e.length):new Array(e.length))}(e))),e):u.Promise.reject(new Error("Can't read the data of '"+r+"'. Is it in a supported JavaScript type (String, Blob, ArrayBuffer, etc) ?"))})};},{"./base64":1,"./external":6,"./nodejsUtils":14,"./support":30,setimmediate:54}],33:[function(e,t,r){var n=e("./reader/readerFor"),i=e("./utils"),s=e("./signature"),a=e("./zipEntry"),o=e("./support");function h(e){this.files=[],this.loadOptions=e;}h.prototype={checkSignature:function(e){if(!this.reader.readAndCheckSignature(e)){this.reader.index-=4;var t=this.reader.readString(4);throw new Error("Corrupted zip or bug: unexpected signature ("+i.pretty(t)+", expected "+i.pretty(e)+")")}},isSignature:function(e,t){var r=this.reader.index;this.reader.setIndex(e);var n=this.reader.readString(4)===t;return this.reader.setIndex(r),n},readBlockEndOfCentral:function(){this.diskNumber=this.reader.readInt(2),this.diskWithCentralDirStart=this.reader.readInt(2),this.centralDirRecordsOnThisDisk=this.reader.readInt(2),this.centralDirRecords=this.reader.readInt(2),this.centralDirSize=this.reader.readInt(4),this.centralDirOffset=this.reader.readInt(4),this.zipCommentLength=this.reader.readInt(2);var e=this.reader.readData(this.zipCommentLength),t=o.uint8array?"uint8array":"array",r=i.transformTo(t,e);this.zipComment=this.loadOptions.decodeFileName(r);},readBlockZip64EndOfCentral:function(){this.zip64EndOfCentralSize=this.reader.readInt(8),this.reader.skip(4),this.diskNumber=this.reader.readInt(4),this.diskWithCentralDirStart=this.reader.readInt(4),this.centralDirRecordsOnThisDisk=this.reader.readInt(8),this.centralDirRecords=this.reader.readInt(8),this.centralDirSize=this.reader.readInt(8),this.centralDirOffset=this.reader.readInt(8),this.zip64ExtensibleData={};for(var e,t,r,n=this.zip64EndOfCentralSize-44;0<n;)e=this.reader.readInt(2),t=this.reader.readInt(4),r=this.reader.readData(t),this.zip64ExtensibleData[e]={id:e,length:t,value:r};},readBlockZip64EndOfCentralLocator:function(){if(this.diskWithZip64CentralDirStart=this.reader.readInt(4),this.relativeOffsetEndOfZip64CentralDir=this.reader.readInt(8),this.disksCount=this.reader.readInt(4),1<this.disksCount)throw new Error("Multi-volumes zip are not supported")},readLocalFiles:function(){var e,t;for(e=0;e<this.files.length;e++)t=this.files[e],this.reader.setIndex(t.localHeaderOffset),this.checkSignature(s.LOCAL_FILE_HEADER),t.readLocalPart(this.reader),t.handleUTF8(),t.processAttributes();},readCentralDir:function(){var e;for(this.reader.setIndex(this.centralDirOffset);this.reader.readAndCheckSignature(s.CENTRAL_FILE_HEADER);)(e=new a({zip64:this.zip64},this.loadOptions)).readCentralPart(this.reader),this.files.push(e);if(this.centralDirRecords!==this.files.length&&0!==this.centralDirRecords&&0===this.files.length)throw new Error("Corrupted zip or bug: expected "+this.centralDirRecords+" records in central dir, got "+this.files.length)},readEndOfCentral:function(){var e=this.reader.lastIndexOfSignature(s.CENTRAL_DIRECTORY_END);if(e<0)throw !this.isSignature(0,s.LOCAL_FILE_HEADER)?new Error("Can't find end of central directory : is this a zip file ? If it is, see https://stuk.github.io/jszip/documentation/howto/read_zip.html"):new Error("Corrupted zip: can't find end of central directory");this.reader.setIndex(e);var t=e;if(this.checkSignature(s.CENTRAL_DIRECTORY_END),this.readBlockEndOfCentral(),this.diskNumber===i.MAX_VALUE_16BITS||this.diskWithCentralDirStart===i.MAX_VALUE_16BITS||this.centralDirRecordsOnThisDisk===i.MAX_VALUE_16BITS||this.centralDirRecords===i.MAX_VALUE_16BITS||this.centralDirSize===i.MAX_VALUE_32BITS||this.centralDirOffset===i.MAX_VALUE_32BITS){if(this.zip64=!0,(e=this.reader.lastIndexOfSignature(s.ZIP64_CENTRAL_DIRECTORY_LOCATOR))<0)throw new Error("Corrupted zip: can't find the ZIP64 end of central directory locator");if(this.reader.setIndex(e),this.checkSignature(s.ZIP64_CENTRAL_DIRECTORY_LOCATOR),this.readBlockZip64EndOfCentralLocator(),!this.isSignature(this.relativeOffsetEndOfZip64CentralDir,s.ZIP64_CENTRAL_DIRECTORY_END)&&(this.relativeOffsetEndOfZip64CentralDir=this.reader.lastIndexOfSignature(s.ZIP64_CENTRAL_DIRECTORY_END),this.relativeOffsetEndOfZip64CentralDir<0))throw new Error("Corrupted zip: can't find the ZIP64 end of central directory");this.reader.setIndex(this.relativeOffsetEndOfZip64CentralDir),this.checkSignature(s.ZIP64_CENTRAL_DIRECTORY_END),this.readBlockZip64EndOfCentral();}var r=this.centralDirOffset+this.centralDirSize;this.zip64&&(r+=20,r+=12+this.zip64EndOfCentralSize);var n=t-r;if(0<n)this.isSignature(t,s.CENTRAL_FILE_HEADER)||(this.reader.zero=n);else if(n<0)throw new Error("Corrupted zip: missing "+Math.abs(n)+" bytes.")},prepareReader:function(e){this.reader=n(e);},load:function(e){this.prepareReader(e),this.readEndOfCentral(),this.readCentralDir(),this.readLocalFiles();}},t.exports=h;},{"./reader/readerFor":22,"./signature":23,"./support":30,"./utils":32,"./zipEntry":34}],34:[function(e,t,r){var n=e("./reader/readerFor"),s=e("./utils"),i=e("./compressedObject"),a=e("./crc32"),o=e("./utf8"),h=e("./compressions"),u=e("./support");function l(e,t){this.options=e,this.loadOptions=t;}l.prototype={isEncrypted:function(){return 1==(1&this.bitFlag)},useUTF8:function(){return 2048==(2048&this.bitFlag)},readLocalPart:function(e){var t,r;if(e.skip(22),this.fileNameLength=e.readInt(2),r=e.readInt(2),this.fileName=e.readData(this.fileNameLength),e.skip(r),-1===this.compressedSize||-1===this.uncompressedSize)throw new Error("Bug or corrupted zip : didn't get enough information from the central directory (compressedSize === -1 || uncompressedSize === -1)");if(null===(t=function(e){for(var t in h)if(Object.prototype.hasOwnProperty.call(h,t)&&h[t].magic===e)return h[t];return null}(this.compressionMethod)))throw new Error("Corrupted zip : compression "+s.pretty(this.compressionMethod)+" unknown (inner file : "+s.transformTo("string",this.fileName)+")");this.decompressed=new i(this.compressedSize,this.uncompressedSize,this.crc32,t,e.readData(this.compressedSize));},readCentralPart:function(e){this.versionMadeBy=e.readInt(2),e.skip(2),this.bitFlag=e.readInt(2),this.compressionMethod=e.readString(2),this.date=e.readDate(),this.crc32=e.readInt(4),this.compressedSize=e.readInt(4),this.uncompressedSize=e.readInt(4);var t=e.readInt(2);if(this.extraFieldsLength=e.readInt(2),this.fileCommentLength=e.readInt(2),this.diskNumberStart=e.readInt(2),this.internalFileAttributes=e.readInt(2),this.externalFileAttributes=e.readInt(4),this.localHeaderOffset=e.readInt(4),this.isEncrypted())throw new Error("Encrypted zip are not supported");e.skip(t),this.readExtraFields(e),this.parseZIP64ExtraField(e),this.fileComment=e.readData(this.fileCommentLength);},processAttributes:function(){this.unixPermissions=null,this.dosPermissions=null;var e=this.versionMadeBy>>8;this.dir=!!(16&this.externalFileAttributes),0==e&&(this.dosPermissions=63&this.externalFileAttributes),3==e&&(this.unixPermissions=this.externalFileAttributes>>16&65535),this.dir||"/"!==this.fileNameStr.slice(-1)||(this.dir=!0);},parseZIP64ExtraField:function(){if(this.extraFields[1]){var e=n(this.extraFields[1].value);this.uncompressedSize===s.MAX_VALUE_32BITS&&(this.uncompressedSize=e.readInt(8)),this.compressedSize===s.MAX_VALUE_32BITS&&(this.compressedSize=e.readInt(8)),this.localHeaderOffset===s.MAX_VALUE_32BITS&&(this.localHeaderOffset=e.readInt(8)),this.diskNumberStart===s.MAX_VALUE_32BITS&&(this.diskNumberStart=e.readInt(4));}},readExtraFields:function(e){var t,r,n,i=e.index+this.extraFieldsLength;for(this.extraFields||(this.extraFields={});e.index+4<i;)t=e.readInt(2),r=e.readInt(2),n=e.readData(r),this.extraFields[t]={id:t,length:r,value:n};e.setIndex(i);},handleUTF8:function(){var e=u.uint8array?"uint8array":"array";if(this.useUTF8())this.fileNameStr=o.utf8decode(this.fileName),this.fileCommentStr=o.utf8decode(this.fileComment);else {var t=this.findExtraFieldUnicodePath();if(null!==t)this.fileNameStr=t;else {var r=s.transformTo(e,this.fileName);this.fileNameStr=this.loadOptions.decodeFileName(r);}var n=this.findExtraFieldUnicodeComment();if(null!==n)this.fileCommentStr=n;else {var i=s.transformTo(e,this.fileComment);this.fileCommentStr=this.loadOptions.decodeFileName(i);}}},findExtraFieldUnicodePath:function(){var e=this.extraFields[28789];if(e){var t=n(e.value);return 1!==t.readInt(1)?null:a(this.fileName)!==t.readInt(4)?null:o.utf8decode(t.readData(e.length-5))}return null},findExtraFieldUnicodeComment:function(){var e=this.extraFields[25461];if(e){var t=n(e.value);return 1!==t.readInt(1)?null:a(this.fileComment)!==t.readInt(4)?null:o.utf8decode(t.readData(e.length-5))}return null}},t.exports=l;},{"./compressedObject":2,"./compressions":3,"./crc32":4,"./reader/readerFor":22,"./support":30,"./utf8":31,"./utils":32}],35:[function(e,t,r){function n(e,t,r){this.name=e,this.dir=r.dir,this.date=r.date,this.comment=r.comment,this.unixPermissions=r.unixPermissions,this.dosPermissions=r.dosPermissions,this._data=t,this._dataBinary=r.binary,this.options={compression:r.compression,compressionOptions:r.compressionOptions};}var s=e("./stream/StreamHelper"),i=e("./stream/DataWorker"),a=e("./utf8"),o=e("./compressedObject"),h=e("./stream/GenericWorker");n.prototype={internalStream:function(e){var t=null,r="string";try{if(!e)throw new Error("No output type specified.");var n="string"===(r=e.toLowerCase())||"text"===r;"binarystring"!==r&&"text"!==r||(r="string"),t=this._decompressWorker();var i=!this._dataBinary;i&&!n&&(t=t.pipe(new a.Utf8EncodeWorker)),!i&&n&&(t=t.pipe(new a.Utf8DecodeWorker));}catch(e){(t=new h("error")).error(e);}return new s(t,r,"")},async:function(e,t){return this.internalStream(e).accumulate(t)},nodeStream:function(e,t){return this.internalStream(e||"nodebuffer").toNodejsStream(t)},_compressWorker:function(e,t){if(this._data instanceof o&&this._data.compression.magic===e.magic)return this._data.getCompressedWorker();var r=this._decompressWorker();return this._dataBinary||(r=r.pipe(new a.Utf8EncodeWorker)),o.createWorkerFrom(r,e,t)},_decompressWorker:function(){return this._data instanceof o?this._data.getContentWorker():this._data instanceof h?this._data:new i(this._data)}};for(var u=["asText","asBinary","asNodeBuffer","asUint8Array","asArrayBuffer"],l=function(){throw new Error("This method has been removed in JSZip 3.0, please check the upgrade 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r=h.length;r;){for(t=h,h=[],e=-1;++e<r;)t[e]();r=h.length;}n=!1;}l.exports=function(e){1!==h.push(e)||n||r();};}).call(this,"undefined"!=typeof commonjsGlobal?commonjsGlobal:"undefined"!=typeof self?self:"undefined"!=typeof window?window:{});},{}],37:[function(e,t,r){var i=e("immediate");function u(){}var l={},s=["REJECTED"],a=["FULFILLED"],n=["PENDING"];function o(e){if("function"!=typeof e)throw new TypeError("resolver must be a function");this.state=n,this.queue=[],this.outcome=void 0,e!==u&&d(this,e);}function h(e,t,r){this.promise=e,"function"==typeof t&&(this.onFulfilled=t,this.callFulfilled=this.otherCallFulfilled),"function"==typeof r&&(this.onRejected=r,this.callRejected=this.otherCallRejected);}function f(t,r,n){i(function(){var e;try{e=r(n);}catch(e){return l.reject(t,e)}e===t?l.reject(t,new TypeError("Cannot resolve promise with itself")):l.resolve(t,e);});}function c(e){var t=e&&e.then;if(e&&("object"==typeof e||"function"==typeof e)&&"function"==typeof t)return 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r,n;;){if(e.lookahead<z){if(j(e),e.lookahead<z&&t===l)return A;if(0===e.lookahead)break}if(r=0,e.lookahead>=x&&(e.ins_h=(e.ins_h<<e.hash_shift^e.window[e.strstart+x-1])&e.hash_mask,r=e.prev[e.strstart&e.w_mask]=e.head[e.ins_h],e.head[e.ins_h]=e.strstart),0!==r&&e.strstart-r<=e.w_size-z&&(e.match_length=L(e,r)),e.match_length>=x)if(n=u._tr_tally(e,e.strstart-e.match_start,e.match_length-x),e.lookahead-=e.match_length,e.match_length<=e.max_lazy_match&&e.lookahead>=x){for(e.match_length--;e.strstart++,e.ins_h=(e.ins_h<<e.hash_shift^e.window[e.strstart+x-1])&e.hash_mask,r=e.prev[e.strstart&e.w_mask]=e.head[e.ins_h],e.head[e.ins_h]=e.strstart,0!=--e.match_length;);e.strstart++;}else e.strstart+=e.match_length,e.match_length=0,e.ins_h=e.window[e.strstart],e.ins_h=(e.ins_h<<e.hash_shift^e.window[e.strstart+1])&e.hash_mask;else n=u._tr_tally(e,0,e.window[e.strstart]),e.lookahead--,e.strstart++;if(n&&(N(e,!1),0===e.strm.avail_out))return A}return e.insert=e.strstart<x-1?e.strstart:x-1,t===f?(N(e,!0),0===e.strm.avail_out?O:B):e.last_lit&&(N(e,!1),0===e.strm.avail_out)?A:I}function W(e,t){for(var r,n,i;;){if(e.lookahead<z){if(j(e),e.lookahead<z&&t===l)return A;if(0===e.lookahead)break}if(r=0,e.lookahead>=x&&(e.ins_h=(e.ins_h<<e.hash_shift^e.window[e.strstart+x-1])&e.hash_mask,r=e.prev[e.strstart&e.w_mask]=e.head[e.ins_h],e.head[e.ins_h]=e.strstart),e.prev_length=e.match_length,e.prev_match=e.match_start,e.match_length=x-1,0!==r&&e.prev_length<e.max_lazy_match&&e.strstart-r<=e.w_size-z&&(e.match_length=L(e,r),e.match_length<=5&&(1===e.strategy||e.match_length===x&&4096<e.strstart-e.match_start)&&(e.match_length=x-1)),e.prev_length>=x&&e.match_length<=e.prev_length){for(i=e.strstart+e.lookahead-x,n=u._tr_tally(e,e.strstart-1-e.prev_match,e.prev_length-x),e.lookahead-=e.prev_length-1,e.prev_length-=2;++e.strstart<=i&&(e.ins_h=(e.ins_h<<e.hash_shift^e.window[e.strstart+x-1])&e.hash_mask,r=e.prev[e.strstart&e.w_mask]=e.head[e.ins_h],e.head[e.ins_h]=e.strstart),0!=--e.prev_length;);if(e.match_available=0,e.match_length=x-1,e.strstart++,n&&(N(e,!1),0===e.strm.avail_out))return A}else if(e.match_available){if((n=u._tr_tally(e,0,e.window[e.strstart-1]))&&N(e,!1),e.strstart++,e.lookahead--,0===e.strm.avail_out)return A}else e.match_available=1,e.strstart++,e.lookahead--;}return e.match_available&&(n=u._tr_tally(e,0,e.window[e.strstart-1]),e.match_available=0),e.insert=e.strstart<x-1?e.strstart:x-1,t===f?(N(e,!0),0===e.strm.avail_out?O:B):e.last_lit&&(N(e,!1),0===e.strm.avail_out)?A:I}function M(e,t,r,n,i){this.good_length=e,this.max_lazy=t,this.nice_length=r,this.max_chain=n,this.func=i;}function H(){this.strm=null,this.status=0,this.pending_buf=null,this.pending_buf_size=0,this.pending_out=0,this.pending=0,this.wrap=0,this.gzhead=null,this.gzindex=0,this.method=v,this.last_flush=-1,this.w_size=0,this.w_bits=0,this.w_mask=0,this.window=null,this.window_size=0,this.prev=null,this.head=null,this.ins_h=0,this.hash_size=0,this.hash_bits=0,this.hash_mask=0,this.hash_shift=0,this.block_start=0,this.match_length=0,this.prev_match=0,this.match_available=0,this.strstart=0,this.match_start=0,this.lookahead=0,this.prev_length=0,this.max_chain_length=0,this.max_lazy_match=0,this.level=0,this.strategy=0,this.good_match=0,this.nice_match=0,this.dyn_ltree=new c.Buf16(2*w),this.dyn_dtree=new c.Buf16(2*(2*a+1)),this.bl_tree=new c.Buf16(2*(2*o+1)),D(this.dyn_ltree),D(this.dyn_dtree),D(this.bl_tree),this.l_desc=null,this.d_desc=null,this.bl_desc=null,this.bl_count=new c.Buf16(k+1),this.heap=new c.Buf16(2*s+1),D(this.heap),this.heap_len=0,this.heap_max=0,this.depth=new c.Buf16(2*s+1),D(this.depth),this.l_buf=0,this.lit_bufsize=0,this.last_lit=0,this.d_buf=0,this.opt_len=0,this.static_len=0,this.matches=0,this.insert=0,this.bi_buf=0,this.bi_valid=0;}function G(e){var t;return e&&e.state?(e.total_in=e.total_out=0,e.data_type=i,(t=e.state).pending=0,t.pending_out=0,t.wrap<0&&(t.wrap=-t.wrap),t.status=t.wrap?C:E,e.adler=2===t.wrap?0:1,t.last_flush=l,u._tr_init(t),m):R(e,_)}function K(e){var t=G(e);return t===m&&function(e){e.window_size=2*e.w_size,D(e.head),e.max_lazy_match=h[e.level].max_lazy,e.good_match=h[e.level].good_length,e.nice_match=h[e.level].nice_length,e.max_chain_length=h[e.level].max_chain,e.strstart=0,e.block_start=0,e.lookahead=0,e.insert=0,e.match_length=e.prev_length=x-1,e.match_available=0,e.ins_h=0;}(e.state),t}function Y(e,t,r,n,i,s){if(!e)return _;var a=1;if(t===g&&(t=6),n<0?(a=0,n=-n):15<n&&(a=2,n-=16),i<1||y<i||r!==v||n<8||15<n||t<0||9<t||s<0||b<s)return R(e,_);8===n&&(n=9);var o=new H;return (e.state=o).strm=e,o.wrap=a,o.gzhead=null,o.w_bits=n,o.w_size=1<<o.w_bits,o.w_mask=o.w_size-1,o.hash_bits=i+7,o.hash_size=1<<o.hash_bits,o.hash_mask=o.hash_size-1,o.hash_shift=~~((o.hash_bits+x-1)/x),o.window=new c.Buf8(2*o.w_size),o.head=new c.Buf16(o.hash_size),o.prev=new c.Buf16(o.w_size),o.lit_bufsize=1<<i+6,o.pending_buf_size=4*o.lit_bufsize,o.pending_buf=new c.Buf8(o.pending_buf_size),o.d_buf=1*o.lit_bufsize,o.l_buf=3*o.lit_bufsize,o.level=t,o.strategy=s,o.method=r,K(e)}h=[new M(0,0,0,0,function(e,t){var r=65535;for(r>e.pending_buf_size-5&&(r=e.pending_buf_size-5);;){if(e.lookahead<=1){if(j(e),0===e.lookahead&&t===l)return A;if(0===e.lookahead)break}e.strstart+=e.lookahead,e.lookahead=0;var n=e.block_start+r;if((0===e.strstart||e.strstart>=n)&&(e.lookahead=e.strstart-n,e.strstart=n,N(e,!1),0===e.strm.avail_out))return A;if(e.strstart-e.block_start>=e.w_size-z&&(N(e,!1),0===e.strm.avail_out))return A}return e.insert=0,t===f?(N(e,!0),0===e.strm.avail_out?O:B):(e.strstart>e.block_start&&(N(e,!1),e.strm.avail_out),A)}),new M(4,4,8,4,Z),new M(4,5,16,8,Z),new M(4,6,32,32,Z),new M(4,4,16,16,W),new M(8,16,32,32,W),new M(8,16,128,128,W),new M(8,32,128,256,W),new M(32,128,258,1024,W),new M(32,258,258,4096,W)],r.deflateInit=function(e,t){return Y(e,t,v,15,8,0)},r.deflateInit2=Y,r.deflateReset=K,r.deflateResetKeep=G,r.deflateSetHeader=function(e,t){return e&&e.state?2!==e.state.wrap?_:(e.state.gzhead=t,m):_},r.deflate=function(e,t){var r,n,i,s;if(!e||!e.state||5<t||t<0)return e?R(e,_):_;if(n=e.state,!e.output||!e.input&&0!==e.avail_in||666===n.status&&t!==f)return R(e,0===e.avail_out?-5:_);if(n.strm=e,r=n.last_flush,n.last_flush=t,n.status===C)if(2===n.wrap)e.adler=0,U(n,31),U(n,139),U(n,8),n.gzhead?(U(n,(n.gzhead.text?1:0)+(n.gzhead.hcrc?2:0)+(n.gzhead.extra?4:0)+(n.gzhead.name?8:0)+(n.gzhead.comment?16:0)),U(n,255&n.gzhead.time),U(n,n.gzhead.time>>8&255),U(n,n.gzhead.time>>16&255),U(n,n.gzhead.time>>24&255),U(n,9===n.level?2:2<=n.strategy||n.level<2?4:0),U(n,255&n.gzhead.os),n.gzhead.extra&&n.gzhead.extra.length&&(U(n,255&n.gzhead.extra.length),U(n,n.gzhead.extra.length>>8&255)),n.gzhead.hcrc&&(e.adler=p(e.adler,n.pending_buf,n.pending,0)),n.gzindex=0,n.status=69):(U(n,0),U(n,0),U(n,0),U(n,0),U(n,0),U(n,9===n.level?2:2<=n.strategy||n.level<2?4:0),U(n,3),n.status=E);else {var a=v+(n.w_bits-8<<4)<<8;a|=(2<=n.strategy||n.level<2?0:n.level<6?1:6===n.level?2:3)<<6,0!==n.strstart&&(a|=32),a+=31-a%31,n.status=E,P(n,a),0!==n.strstart&&(P(n,e.adler>>>16),P(n,65535&e.adler)),e.adler=1;}if(69===n.status)if(n.gzhead.extra){for(i=n.pending;n.gzindex<(65535&n.gzhead.extra.length)&&(n.pending!==n.pending_buf_size||(n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),F(e),i=n.pending,n.pending!==n.pending_buf_size));)U(n,255&n.gzhead.extra[n.gzindex]),n.gzindex++;n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),n.gzindex===n.gzhead.extra.length&&(n.gzindex=0,n.status=73);}else n.status=73;if(73===n.status)if(n.gzhead.name){i=n.pending;do{if(n.pending===n.pending_buf_size&&(n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),F(e),i=n.pending,n.pending===n.pending_buf_size)){s=1;break}s=n.gzindex<n.gzhead.name.length?255&n.gzhead.name.charCodeAt(n.gzindex++):0,U(n,s);}while(0!==s);n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),0===s&&(n.gzindex=0,n.status=91);}else n.status=91;if(91===n.status)if(n.gzhead.comment){i=n.pending;do{if(n.pending===n.pending_buf_size&&(n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),F(e),i=n.pending,n.pending===n.pending_buf_size)){s=1;break}s=n.gzindex<n.gzhead.comment.length?255&n.gzhead.comment.charCodeAt(n.gzindex++):0,U(n,s);}while(0!==s);n.gzhead.hcrc&&n.pending>i&&(e.adler=p(e.adler,n.pending_buf,n.pending-i,i)),0===s&&(n.status=103);}else n.status=103;if(103===n.status&&(n.gzhead.hcrc?(n.pending+2>n.pending_buf_size&&F(e),n.pending+2<=n.pending_buf_size&&(U(n,255&e.adler),U(n,e.adler>>8&255),e.adler=0,n.status=E)):n.status=E),0!==n.pending){if(F(e),0===e.avail_out)return n.last_flush=-1,m}else if(0===e.avail_in&&T(t)<=T(r)&&t!==f)return R(e,-5);if(666===n.status&&0!==e.avail_in)return R(e,-5);if(0!==e.avail_in||0!==n.lookahead||t!==l&&666!==n.status){var o=2===n.strategy?function(e,t){for(var r;;){if(0===e.lookahead&&(j(e),0===e.lookahead)){if(t===l)return A;break}if(e.match_length=0,r=u._tr_tally(e,0,e.window[e.strstart]),e.lookahead--,e.strstart++,r&&(N(e,!1),0===e.strm.avail_out))return A}return e.insert=0,t===f?(N(e,!0),0===e.strm.avail_out?O:B):e.last_lit&&(N(e,!1),0===e.strm.avail_out)?A:I}(n,t):3===n.strategy?function(e,t){for(var r,n,i,s,a=e.window;;){if(e.lookahead<=S){if(j(e),e.lookahead<=S&&t===l)return A;if(0===e.lookahead)break}if(e.match_length=0,e.lookahead>=x&&0<e.strstart&&(n=a[i=e.strstart-1])===a[++i]&&n===a[++i]&&n===a[++i]){s=e.strstart+S;do{}while(n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&n===a[++i]&&i<s);e.match_length=S-(s-i),e.match_length>e.lookahead&&(e.match_length=e.lookahead);}if(e.match_length>=x?(r=u._tr_tally(e,1,e.match_length-x),e.lookahead-=e.match_length,e.strstart+=e.match_length,e.match_length=0):(r=u._tr_tally(e,0,e.window[e.strstart]),e.lookahead--,e.strstart++),r&&(N(e,!1),0===e.strm.avail_out))return A}return e.insert=0,t===f?(N(e,!0),0===e.strm.avail_out?O:B):e.last_lit&&(N(e,!1),0===e.strm.avail_out)?A:I}(n,t):h[n.level].func(n,t);if(o!==O&&o!==B||(n.status=666),o===A||o===O)return 0===e.avail_out&&(n.last_flush=-1),m;if(o===I&&(1===t?u._tr_align(n):5!==t&&(u._tr_stored_block(n,0,0,!1),3===t&&(D(n.head),0===n.lookahead&&(n.strstart=0,n.block_start=0,n.insert=0))),F(e),0===e.avail_out))return n.last_flush=-1,m}return t!==f?m:n.wrap<=0?1:(2===n.wrap?(U(n,255&e.adler),U(n,e.adler>>8&255),U(n,e.adler>>16&255),U(n,e.adler>>24&255),U(n,255&e.total_in),U(n,e.total_in>>8&255),U(n,e.total_in>>16&255),U(n,e.total_in>>24&255)):(P(n,e.adler>>>16),P(n,65535&e.adler)),F(e),0<n.wrap&&(n.wrap=-n.wrap),0!==n.pending?m:1)},r.deflateEnd=function(e){var t;return e&&e.state?(t=e.state.status)!==C&&69!==t&&73!==t&&91!==t&&103!==t&&t!==E&&666!==t?R(e,_):(e.state=null,t===E?R(e,-3):m):_},r.deflateSetDictionary=function(e,t){var r,n,i,s,a,o,h,u,l=t.length;if(!e||!e.state)return _;if(2===(s=(r=e.state).wrap)||1===s&&r.status!==C||r.lookahead)return _;for(1===s&&(e.adler=d(e.adler,t,l,0)),r.wrap=0,l>=r.w_size&&(0===s&&(D(r.head),r.strstart=0,r.block_start=0,r.insert=0),u=new c.Buf8(r.w_size),c.arraySet(u,t,l-r.w_size,r.w_size,0),t=u,l=r.w_size),a=e.avail_in,o=e.next_in,h=e.input,e.avail_in=l,e.next_in=0,e.input=t,j(r);r.lookahead>=x;){for(n=r.strstart,i=r.lookahead-(x-1);r.ins_h=(r.ins_h<<r.hash_shift^r.window[n+x-1])&r.hash_mask,r.prev[n&r.w_mask]=r.head[r.ins_h],r.head[r.ins_h]=n,n++,--i;);r.strstart=n,r.lookahead=x-1,j(r);}return r.strstart+=r.lookahead,r.block_start=r.strstart,r.insert=r.lookahead,r.lookahead=0,r.match_length=r.prev_length=x-1,r.match_available=0,e.next_in=o,e.input=h,e.avail_in=a,r.wrap=s,m},r.deflateInfo="pako deflate (from Nodeca project)";},{"../utils/common":41,"./adler32":43,"./crc32":45,"./messages":51,"./trees":52}],47:[function(e,t,r){t.exports=function(){this.text=0,this.time=0,this.xflags=0,this.os=0,this.extra=null,this.extra_len=0,this.name="",this.comment="",this.hcrc=0,this.done=!1;};},{}],48:[function(e,t,r){t.exports=function(e,t){var r,n,i,s,a,o,h,u,l,f,c,d,p,m,_,g,b,v,y,w,k,x,S,z,C;r=e.state,n=e.next_in,z=e.input,i=n+(e.avail_in-5),s=e.next_out,C=e.output,a=s-(t-e.avail_out),o=s+(e.avail_out-257),h=r.dmax,u=r.wsize,l=r.whave,f=r.wnext,c=r.window,d=r.hold,p=r.bits,m=r.lencode,_=r.distcode,g=(1<<r.lenbits)-1,b=(1<<r.distbits)-1;e:do{p<15&&(d+=z[n++]<<p,p+=8,d+=z[n++]<<p,p+=8),v=m[d&g];t:for(;;){if(d>>>=y=v>>>24,p-=y,0===(y=v>>>16&255))C[s++]=65535&v;else {if(!(16&y)){if(0==(64&y)){v=m[(65535&v)+(d&(1<<y)-1)];continue t}if(32&y){r.mode=12;break e}e.msg="invalid literal/length code",r.mode=30;break e}w=65535&v,(y&=15)&&(p<y&&(d+=z[n++]<<p,p+=8),w+=d&(1<<y)-1,d>>>=y,p-=y),p<15&&(d+=z[n++]<<p,p+=8,d+=z[n++]<<p,p+=8),v=_[d&b];r:for(;;){if(d>>>=y=v>>>24,p-=y,!(16&(y=v>>>16&255))){if(0==(64&y)){v=_[(65535&v)+(d&(1<<y)-1)];continue r}e.msg="invalid distance code",r.mode=30;break e}if(k=65535&v,p<(y&=15)&&(d+=z[n++]<<p,(p+=8)<y&&(d+=z[n++]<<p,p+=8)),h<(k+=d&(1<<y)-1)){e.msg="invalid distance too far back",r.mode=30;break e}if(d>>>=y,p-=y,(y=s-a)<k){if(l<(y=k-y)&&r.sane){e.msg="invalid distance too far back",r.mode=30;break e}if(S=c,(x=0)===f){if(x+=u-y,y<w){for(w-=y;C[s++]=c[x++],--y;);x=s-k,S=C;}}else if(f<y){if(x+=u+f-y,(y-=f)<w){for(w-=y;C[s++]=c[x++],--y;);if(x=0,f<w){for(w-=y=f;C[s++]=c[x++],--y;);x=s-k,S=C;}}}else if(x+=f-y,y<w){for(w-=y;C[s++]=c[x++],--y;);x=s-k,S=C;}for(;2<w;)C[s++]=S[x++],C[s++]=S[x++],C[s++]=S[x++],w-=3;w&&(C[s++]=S[x++],1<w&&(C[s++]=S[x++]));}else {for(x=s-k;C[s++]=C[x++],C[s++]=C[x++],C[s++]=C[x++],2<(w-=3););w&&(C[s++]=C[x++],1<w&&(C[s++]=C[x++]));}break}}break}}while(n<i&&s<o);n-=w=p>>3,d&=(1<<(p-=w<<3))-1,e.next_in=n,e.next_out=s,e.avail_in=n<i?i-n+5:5-(n-i),e.avail_out=s<o?o-s+257:257-(s-o),r.hold=d,r.bits=p;};},{}],49:[function(e,t,r){var I=e("../utils/common"),O=e("./adler32"),B=e("./crc32"),R=e("./inffast"),T=e("./inftrees"),D=1,F=2,N=0,U=-2,P=1,n=852,i=592;function L(e){return (e>>>24&255)+(e>>>8&65280)+((65280&e)<<8)+((255&e)<<24)}function s(){this.mode=0,this.last=!1,this.wrap=0,this.havedict=!1,this.flags=0,this.dmax=0,this.check=0,this.total=0,this.head=null,this.wbits=0,this.wsize=0,this.whave=0,this.wnext=0,this.window=null,this.hold=0,this.bits=0,this.length=0,this.offset=0,this.extra=0,this.lencode=null,this.distcode=null,this.lenbits=0,this.distbits=0,this.ncode=0,this.nlen=0,this.ndist=0,this.have=0,this.next=null,this.lens=new I.Buf16(320),this.work=new I.Buf16(288),this.lendyn=null,this.distdyn=null,this.sane=0,this.back=0,this.was=0;}function a(e){var t;return e&&e.state?(t=e.state,e.total_in=e.total_out=t.total=0,e.msg="",t.wrap&&(e.adler=1&t.wrap),t.mode=P,t.last=0,t.havedict=0,t.dmax=32768,t.head=null,t.hold=0,t.bits=0,t.lencode=t.lendyn=new I.Buf32(n),t.distcode=t.distdyn=new I.Buf32(i),t.sane=1,t.back=-1,N):U}function o(e){var t;return e&&e.state?((t=e.state).wsize=0,t.whave=0,t.wnext=0,a(e)):U}function h(e,t){var r,n;return 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e;o--,u+=n[s++]<<l,l+=8;}if(2&r.wrap&&35615===u){E[r.check=0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0),l=u=0,r.mode=2;break}if(r.flags=0,r.head&&(r.head.done=!1),!(1&r.wrap)||(((255&u)<<8)+(u>>8))%31){e.msg="incorrect header check",r.mode=30;break}if(8!=(15&u)){e.msg="unknown compression method",r.mode=30;break}if(l-=4,k=8+(15&(u>>>=4)),0===r.wbits)r.wbits=k;else if(k>r.wbits){e.msg="invalid window size",r.mode=30;break}r.dmax=1<<k,e.adler=r.check=1,r.mode=512&u?10:12,l=u=0;break;case 2:for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}if(r.flags=u,8!=(255&r.flags)){e.msg="unknown compression method",r.mode=30;break}if(57344&r.flags){e.msg="unknown header flags set",r.mode=30;break}r.head&&(r.head.text=u>>8&1),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0)),l=u=0,r.mode=3;case 3:for(;l<32;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}r.head&&(r.head.time=u),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,E[2]=u>>>16&255,E[3]=u>>>24&255,r.check=B(r.check,E,4,0)),l=u=0,r.mode=4;case 4:for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}r.head&&(r.head.xflags=255&u,r.head.os=u>>8),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0)),l=u=0,r.mode=5;case 5:if(1024&r.flags){for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}r.length=u,r.head&&(r.head.extra_len=u),512&r.flags&&(E[0]=255&u,E[1]=u>>>8&255,r.check=B(r.check,E,2,0)),l=u=0;}else r.head&&(r.head.extra=null);r.mode=6;case 6:if(1024&r.flags&&(o<(d=r.length)&&(d=o),d&&(r.head&&(k=r.head.extra_len-r.length,r.head.extra||(r.head.extra=new Array(r.head.extra_len)),I.arraySet(r.head.extra,n,s,d,k)),512&r.flags&&(r.check=B(r.check,n,d,s)),o-=d,s+=d,r.length-=d),r.length))break e;r.length=0,r.mode=7;case 7:if(2048&r.flags){if(0===o)break e;for(d=0;k=n[s+d++],r.head&&k&&r.length<65536&&(r.head.name+=String.fromCharCode(k)),k&&d<o;);if(512&r.flags&&(r.check=B(r.check,n,d,s)),o-=d,s+=d,k)break e}else r.head&&(r.head.name=null);r.length=0,r.mode=8;case 8:if(4096&r.flags){if(0===o)break e;for(d=0;k=n[s+d++],r.head&&k&&r.length<65536&&(r.head.comment+=String.fromCharCode(k)),k&&d<o;);if(512&r.flags&&(r.check=B(r.check,n,d,s)),o-=d,s+=d,k)break e}else r.head&&(r.head.comment=null);r.mode=9;case 9:if(512&r.flags){for(;l<16;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}if(u!==(65535&r.check)){e.msg="header crc mismatch",r.mode=30;break}l=u=0;}r.head&&(r.head.hcrc=r.flags>>9&1,r.head.done=!0),e.adler=r.check=0,r.mode=12;break;case 10:for(;l<32;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}e.adler=r.check=L(u),l=u=0,r.mode=11;case 11:if(0===r.havedict)return e.next_out=a,e.avail_out=h,e.next_in=s,e.avail_in=o,r.hold=u,r.bits=l,2;e.adler=r.check=1,r.mode=12;case 12:if(5===t||6===t)break e;case 13:if(r.last){u>>>=7&l,l-=7&l,r.mode=27;break}for(;l<3;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}switch(r.last=1&u,l-=1,3&(u>>>=1)){case 0:r.mode=14;break;case 1:if(j(r),r.mode=20,6!==t)break;u>>>=2,l-=2;break e;case 2:r.mode=17;break;case 3:e.msg="invalid block type",r.mode=30;}u>>>=2,l-=2;break;case 14:for(u>>>=7&l,l-=7&l;l<32;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}if((65535&u)!=(u>>>16^65535)){e.msg="invalid stored block lengths",r.mode=30;break}if(r.length=65535&u,l=u=0,r.mode=15,6===t)break e;case 15:r.mode=16;case 16:if(d=r.length){if(o<d&&(d=o),h<d&&(d=h),0===d)break e;I.arraySet(i,n,s,d,a),o-=d,s+=d,h-=d,a+=d,r.length-=d;break}r.mode=12;break;case 17:for(;l<14;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}if(r.nlen=257+(31&u),u>>>=5,l-=5,r.ndist=1+(31&u),u>>>=5,l-=5,r.ncode=4+(15&u),u>>>=4,l-=4,286<r.nlen||30<r.ndist){e.msg="too many length or distance symbols",r.mode=30;break}r.have=0,r.mode=18;case 18:for(;r.have<r.ncode;){for(;l<3;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}r.lens[A[r.have++]]=7&u,u>>>=3,l-=3;}for(;r.have<19;)r.lens[A[r.have++]]=0;if(r.lencode=r.lendyn,r.lenbits=7,S={bits:r.lenbits},x=T(0,r.lens,0,19,r.lencode,0,r.work,S),r.lenbits=S.bits,x){e.msg="invalid code lengths set",r.mode=30;break}r.have=0,r.mode=19;case 19:for(;r.have<r.nlen+r.ndist;){for(;g=(C=r.lencode[u&(1<<r.lenbits)-1])>>>16&255,b=65535&C,!((_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}if(b<16)u>>>=_,l-=_,r.lens[r.have++]=b;else {if(16===b){for(z=_+2;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}if(u>>>=_,l-=_,0===r.have){e.msg="invalid bit length repeat",r.mode=30;break}k=r.lens[r.have-1],d=3+(3&u),u>>>=2,l-=2;}else if(17===b){for(z=_+3;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}l-=_,k=0,d=3+(7&(u>>>=_)),u>>>=3,l-=3;}else {for(z=_+7;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}l-=_,k=0,d=11+(127&(u>>>=_)),u>>>=7,l-=7;}if(r.have+d>r.nlen+r.ndist){e.msg="invalid bit length 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e;o--,u+=n[s++]<<l,l+=8;}if(g&&0==(240&g)){for(v=_,y=g,w=b;g=(C=r.lencode[w+((u&(1<<v+y)-1)>>v)])>>>16&255,b=65535&C,!(v+(_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}u>>>=v,l-=v,r.back+=v;}if(u>>>=_,l-=_,r.back+=_,r.length=b,0===g){r.mode=26;break}if(32&g){r.back=-1,r.mode=12;break}if(64&g){e.msg="invalid literal/length code",r.mode=30;break}r.extra=15&g,r.mode=22;case 22:if(r.extra){for(z=r.extra;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}r.length+=u&(1<<r.extra)-1,u>>>=r.extra,l-=r.extra,r.back+=r.extra;}r.was=r.length,r.mode=23;case 23:for(;g=(C=r.distcode[u&(1<<r.distbits)-1])>>>16&255,b=65535&C,!((_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}if(0==(240&g)){for(v=_,y=g,w=b;g=(C=r.distcode[w+((u&(1<<v+y)-1)>>v)])>>>16&255,b=65535&C,!(v+(_=C>>>24)<=l);){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}u>>>=v,l-=v,r.back+=v;}if(u>>>=_,l-=_,r.back+=_,64&g){e.msg="invalid distance code",r.mode=30;break}r.offset=b,r.extra=15&g,r.mode=24;case 24:if(r.extra){for(z=r.extra;l<z;){if(0===o)break e;o--,u+=n[s++]<<l,l+=8;}r.offset+=u&(1<<r.extra)-1,u>>>=r.extra,l-=r.extra,r.back+=r.extra;}if(r.offset>r.dmax){e.msg="invalid distance too far back",r.mode=30;break}r.mode=25;case 25:if(0===h)break e;if(d=c-h,r.offset>d){if((d=r.offset-d)>r.whave&&r.sane){e.msg="invalid distance too far back",r.mode=30;break}p=d>r.wnext?(d-=r.wnext,r.wsize-d):r.wnext-d,d>r.length&&(d=r.length),m=r.window;}else m=i,p=a-r.offset,d=r.length;for(h<d&&(d=h),h-=d,r.length-=d;i[a++]=m[p++],--d;);0===r.length&&(r.mode=21);break;case 26:if(0===h)break e;i[a++]=r.length,h--,r.mode=21;break;case 27:if(r.wrap){for(;l<32;){if(0===o)break e;o--,u|=n[s++]<<l,l+=8;}if(c-=h,e.total_out+=c,r.total+=c,c&&(e.adler=r.check=r.flags?B(r.check,i,c,a-c):O(r.check,i,c,a-c)),c=h,(r.flags?u:L(u))!==r.check){e.msg="incorrect data check",r.mode=30;break}l=u=0;}r.mode=28;case 28:if(r.wrap&&r.flags){for(;l<32;){if(0===o)break 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        this.draw = svg(this.contentEL).size('100%', '100%');
        this.setAppSetting();
        containerEL.appendChild(this.appEl);
        this.containerEL = containerEL;
        //layout direct
        this._indicateDom = document.createElement('div');
        this._indicateDom.classList.add('mm-node-layout-indicate');
        this._indicateDom.style.display = 'none';
        //menu
        this._menuDom = document.createElement('div');
        this._menuDom.classList.add('mm-node-menu');
        this._menuDom.style.display = 'none';
        this.setMenuIcon();
        this.contentEL.appendChild(this._indicateDom);
        this.contentEL.appendChild(this._menuDom);
        //history
        this.exec = new Exec();
        // link line
        this.edgeGroup = this.draw.group();
        this.appClickFn = this.appClickFn.bind(this);
        this.appDragstart = this.appDragstart.bind(this);
        this.appDragend = this.appDragend.bind(this);
        this.appDragover = this.appDragover.bind(this);
        this.appDblclickFn = this.appDblclickFn.bind(this);
        this.appMouseOverFn = this.appMouseOverFn.bind(this);
        this.appDrop = this.appDrop.bind(this);
        this.appKeyup = this.appKeyup.bind(this);
        this.compositionStart = this.compositionStart.bind(this);
        this.compositionEnd = this.compositionEnd.bind(this);
        this.appKeydown = this.appKeydown.bind(this);
        this.appMousewheel = this.appMousewheel.bind(this);
        this.appMouseMove = this.appMouseMove.bind(this);
        this.appMouseDown = this.appMouseDown.bind(this);
        this.appMouseUp = this.appMouseUp.bind(this);
        //custom event
        this.initNode = this.initNode.bind(this);
        this.renderEditNode = this.renderEditNode.bind(this);
        this.mindMapChange = this.mindMapChange.bind(this);
        this.initEvent();
        //this.center();
    }
    setMenuIcon() {
        var addNodeDom = document.createElement('span');
        var deleteNodeDom = document.createElement('span');
        addNodeDom.classList.add('mm-icon-add-node');
        deleteNodeDom.classList.add('mm-icon-delete-node');
        addNodeDom.innerHTML = addIcon;
        deleteNodeDom.innerHTML = deleteIcon;
        this._menuDom.appendChild(addNodeDom);
        this._menuDom.appendChild(deleteNodeDom);
    }
    setAppSetting() {
        this.appEl.style.width = `${this.setting.canvasSize}px`;
        this.appEl.style.height = `${this.setting.canvasSize}px`;
        this.contentEL.style.width = `100%`;
        this.contentEL.style.height = `100%`;
        //  this.contentEL.style.color=`${this.setting.color};`;
        this.contentEL.style.background = `${this.setting.background}`;
        this.contentEL.style.fontSize = `${this.setting.fontSize}px`;
    }
    //create node
    init(collapsedIds) {
        var that = this;
        var data = this.data;
        var x = this.setting.canvasSize / 2 - 60;
        var y = this.setting.canvasSize / 2 - 200;
        var waitCollapseNodes = [];
        function initNode(d, isRoot, p) {
            that._nodeNum++;
            var n = new Node(d, that);
            // if (collapsedIds && collapsedIds.includes(n.getId())) {
            //     n.isExpand = false;
            // }
            // if (p && (!p.isExpand || p.isHide)) {
            //     n.isHide = true;
            // }
            that.contentEL.appendChild(n.containEl);
            if (isRoot) {
                n.setPosition(x, y);
                that.root = n;
                n.isRoot = true;
            }
            else {
                n.setPosition(0, 0);
                p.children.push(n);
                n.parent = p;
            }
            n.refreshBox();
            if (!d.expanded) {
                waitCollapseNodes.push(n);
            }
            n.refreshBox();
            if (d.children && d.children.length) {
                d.children.forEach((dd) => {
                    initNode(dd, false, n);
                });
            }
        }
        initNode(data, true);
        if (waitCollapseNodes.length) {
            waitCollapseNodes.forEach(n => {
                n.collapse();
            });
        }
    }
    traverseBF(callback, node) {
        var array = [];
        array.push(node || this.root);
        var currentNode = array.shift();
        while (currentNode) {
            for (let i = 0, len = currentNode.children.length; i < len; i++) {
                array.push(currentNode.children[i]);
            }
            callback(currentNode);
            currentNode = array.shift();
        }
    }
    traverseDF(callback, node, cbFirst) {
        function recurse(currentNode) {
            if (currentNode) {
                if (cbFirst) {
                    callback(currentNode);
                }
                if (currentNode.children) {
                    for (var i = 0, length = currentNode.children.length; i < length; i++) {
                        recurse(currentNode.children[i]);
                    }
                }
                if (!cbFirst) {
                    callback(currentNode);
                }
            }
        }
        recurse(node || this.root);
    }
    getNodeById(id) {
        var snode = null;
        this.traverseDF((n) => {
            if (n.getId() == id) {
                snode = n;
            }
        });
        return snode;
    }
    clearSelectNode() {
        if (this.selectNode) {
            this.selectNode.unSelect();
            this.selectNode = null;
        }
        if (this.editNode) {
            if (this.editNode.isEdit) {
                this.editNode.cancelEdit();
            }
            this.editNode = null;
        }
    }
    initEvent() {
        this.appEl.addEventListener('click', this.appClickFn);
        this.appEl.addEventListener('mouseover', this.appMouseOverFn);
        this.appEl.addEventListener('dblclick', this.appDblclickFn);
        this.appEl.addEventListener('dragstart', this.appDragstart);
        this.appEl.addEventListener('dragover', this.appDragover);
        this.appEl.addEventListener('dragend', this.appDragend);
        this.appEl.addEventListener('drop', this.appDrop);
        document.addEventListener('keyup', this.appKeyup);
        document.addEventListener('keydown', this.appKeydown);
        document.addEventListener('compositionstart', this.compositionStart);
        document.addEventListener('compositionend', this.compositionEnd);
        document.body.addEventListener('mousewheel', this.appMousewheel);
        if (obsidian.Platform.isDesktop) {
            this.appEl.addEventListener('mousedown', this.appMouseDown);
            this.appEl.addEventListener('mouseup', this.appMouseUp);
        }
        this.appEl.addEventListener('mousemove', this.appMouseMove);
        //custom event
        this.on('initNode', this.initNode);
        this.on('renderEditNode', this.renderEditNode);
        this.on('mindMapChange', this.mindMapChange);
    }
    removeEvent() {
        this.appEl.removeEventListener('click', this.appClickFn);
        this.appEl.removeEventListener('dragstart', this.appDragstart);
        this.appEl.removeEventListener('dragover', this.appDragover);
        this.appEl.removeEventListener('dragend', this.appDragend);
        this.appEl.removeEventListener('dblClick', this.appDblclickFn);
        this.appEl.removeEventListener('mouseover', this.appMouseOverFn);
        this.appEl.removeEventListener('drop', this.appDrop);
        document.removeEventListener('keyup', this.appKeyup);
        document.removeEventListener('keydown', this.appKeydown);
        document.removeEventListener('compositionstart', this.compositionStart);
        document.removeEventListener('compositionend', this.compositionEnd);
        document.body.removeEventListener('mousewheel', this.appMousewheel);
        if (obsidian.Platform.isDesktop) {
            this.appEl.removeEventListener('mousedown', this.appMouseDown);
            this.appEl.removeEventListener('mouseup', this.appMouseUp);
        }
        this.appEl.removeEventListener('mousemove', this.appMouseMove);
        this.off('initNode', this.initNode);
        this.off('renderEditNode', this.renderEditNode);
        this.off('mindMapChange', this.mindMapChange);
    }
    initNode(evt) {
        this._tempNum++;
        //console.log(this._nodeNum,this._tempNum);
        if (this._tempNum == this._nodeNum) {
            this.refresh();
            this.center();
        }
    }
    renderEditNode(evt) {
        var node = evt.detail.node || null;
        node === null || node === void 0 ? void 0 : node.clearCacheData();
        this.refresh();
    }
    mindMapChange() {
        var _a;
        //console.log(this.view)
        (_a = this.view) === null || _a === void 0 ? void 0 : _a.mindMapChange();
    }
    appKeydown(e) {
        var keyCode = e.keyCode || e.which || e.charCode;
        var ctrlKey = e.ctrlKey || e.metaKey;
        var shiftKey = e.shiftKey;
        if (!ctrlKey && !shiftKey) {
            //enter 
            if (keyCode == 13 || e.key == 'Enter') {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    e.preventDefault();
                    e.stopPropagation();
                    // node.edit();
                    // this._menuDom.style.display = 'none';
                    if (!node.isExpand) {
                        node.expand();
                    }
                    if (!node.parent)
                        return;
                    node.mindmap.execute('addSiblingNode', {
                        parent: node.parent
                    });
                    this._menuDom.style.display = 'none';
                }
                else if (node && node.isEdit) {
                    if (this.isComposing || e.isComposing || e.key === 'Process' || e.keyCode === 229) {
                        return;
                    }
                    else {
                        node.cancelEdit();
                        node.select();
                        node.mindmap.editNode = null;
                    }
                }
            }
            // tab
            if (keyCode == 9 || keyCode == 45) {
                e.preventDefault();
                e.stopPropagation();
            }
            if (keyCode == 32) {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    e.preventDefault();
                    e.stopPropagation();
                    node.edit();
                    this._menuDom.style.display = 'none';
                }
            }
        }
        // if (!ctrlKey && shiftKey) {
        //     //enter > add node
        //     if (keyCode == 13 || e.key =='Enter') {
        //         var node = this.selectNode;
        //         if (node && !node.isEdit) {
        //             e.preventDefault();
        //             e.stopPropagation();
        //             if (!node.isExpand) {
        //                 node.expand();
        //             }
        //             if (!node.parent) return;
        //             node.mindmap.execute('addSiblingNode', {
        //                 parent: node.parent
        //             });
        //             this._menuDom.style.display='none';
        //         }
        //     }
        // }
        if (ctrlKey && !shiftKey) {
            //ctrl + y
            if (keyCode == 89) {
                e.preventDefault();
                e.stopPropagation();
                this.redo();
            }
            //ctrl + z
            if (keyCode == 90) {
                e.preventDefault();
                e.stopPropagation();
                this.undo();
            }
        }
    }
    compositionStart(e) {
        this.isComposing = true;
    }
    compositionEnd(e) {
        this.isComposing = false;
    }
    appKeyup(e) {
        var keyCode = e.keyCode || e.which || e.charCode;
        var ctrlKey = e.ctrlKey || e.metaKey;
        var shiftKey = e.shiftKey;
        if (!ctrlKey && !shiftKey) {
            // //enter 
            // if (keyCode == 13 || e.key =='Enter') {
            //     var node = this.selectNode;
            //     if (node && !node.isEdit) {
            //         e.preventDefault();
            //         e.stopPropagation();
            //         if (!node.isExpand) {
            //             node.expand();
            //         }
            //         if (!node.parent) return;
            //         node.mindmap.execute('addSiblingNode', {
            //             parent: node.parent
            //         });
            //         this._menuDom.style.display='none';
            //     } else if (node && node.isEdit) {
            //         if (this.isComposing || e.isComposing || e.key === 'Process' || e.keyCode === 229) {
            //             return
            //         } else {
            //             node.cancelEdit();
            //             node.select();
            //             node.mindmap.editNode=null;
            //         }
            //     }
            // }
            //delete
            if (keyCode == 46 || e.key == 'Delete' || e.key == 'Backspace') {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    e.preventDefault();
                    e.stopPropagation();
                    node.mindmap.execute("deleteNodeAndChild", { node });
                    this._menuDom.style.display = 'none';
                }
            }
            //tab
            if (keyCode == 9 || keyCode == 45 || e.key == 'Tab') {
                e.preventDefault();
                e.stopPropagation();
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    if (!node.isExpand) {
                        node.expand();
                    }
                    node.mindmap.execute("addChildNode", { parent: node });
                    this._menuDom.style.display = 'none';
                }
                else if (node && node.isEdit) {
                    node.cancelEdit();
                    node.select();
                    node.mindmap.editNode = null;
                }
            }
            // up
            if (keyCode == 38 || e.key == 'ArrowUp') {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    this._selectNode(node, "up");
                }
            }
            if (keyCode == 40 || e.key == 'ArrowDown') {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    this._selectNode(node, "down");
                }
            }
            if (keyCode == 39 || e.key == 'ArrowRight') {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    this._selectNode(node, "right");
                }
            }
            if (keyCode == 37 || e.key == 'ArrowLeft') {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    this._selectNode(node, "left");
                }
            }
        }
        if (ctrlKey && !shiftKey) {
            //ctr + /  toggle expand node
            if (keyCode == 191) {
                var node = this.selectNode;
                if (node && !node.isEdit) {
                    if (node.isExpand) {
                        node.mindmap.execute('collapseNode', {
                            node
                        });
                    }
                    else {
                        node.mindmap.execute('expandNode', {
                            node
                        });
                    }
                }
            }
            // ctrl + E  center
            if (keyCode == 69) {
                this.center();
            }
        }
    }
    _selectNode(node, direct) {
        if (!node) {
            return;
        }
        var minDis;
        var waitNode = null;
        var pos = node.getPosition();
        var mind = this;
        mind.traverseDF((n) => {
            var p = n.getPosition();
            var dx = Math.abs(p.x - pos.x);
            var dy = Math.abs(p.y - pos.y);
            var dis = Math.sqrt(dx * dx + dy * dy);
            switch (direct) {
                case "right":
                    if (p.x > pos.x) {
                        if (minDis) {
                            if (minDis > dis) {
                                minDis = dis;
                                waitNode = n;
                            }
                        }
                        else {
                            minDis = dis;
                            waitNode = n;
                        }
                    }
                    break;
                case "left":
                    if (p.x < pos.x) {
                        if (minDis) {
                            if (minDis > dis) {
                                minDis = dis;
                                waitNode = n;
                            }
                        }
                        else {
                            minDis = dis;
                            waitNode = n;
                        }
                    }
                    break;
                case "up":
                    if (p.y < pos.y) {
                        if (minDis) {
                            if (minDis > dis) {
                                minDis = dis;
                                waitNode = n;
                            }
                        }
                        else {
                            minDis = dis;
                            waitNode = n;
                        }
                    }
                    break;
                case "down":
                    if (p.y > pos.y) {
                        if (minDis) {
                            if (minDis > dis) {
                                minDis = dis;
                                waitNode = n;
                            }
                        }
                        else {
                            minDis = dis;
                            waitNode = n;
                        }
                    }
                    break;
            }
        });
        if (waitNode) {
            mind.clearSelectNode();
            waitNode.select();
        }
    }
    appClickFn(evt) {
        var _a;
        var targetEl = evt.target;
        if (targetEl) {
            if (targetEl.tagName == 'A' && targetEl.hasClass("internal-link")) {
                evt.preventDefault();
                var targetEl = evt.target;
                var href = targetEl.getAttr("href");
                if (href) {
                    this.view.app.workspace.openLinkText(href, this.view.file.path, evt.ctrlKey || evt.metaKey);
                }
            }
            if (targetEl.hasClass('mm-node-bar')) {
                evt.preventDefault();
                evt.stopPropagation();
                var id = targetEl.closest('.mm-node').getAttribute('data-id');
                var node = this.getNodeById(id);
                if (node.isExpand) {
                    node.mindmap.execute('collapseNode', {
                        node
                    });
                }
                else {
                    node.mindmap.execute('expandNode', {
                        node
                    });
                }
                return;
            }
            if (targetEl.closest('.mm-node-menu')) {
                if (targetEl.closest('.mm-icon-add-node')) {
                    var selectNode = this.selectNode;
                    if (selectNode) {
                        selectNode.mindmap.execute("addChildNode", { parent: selectNode });
                        this._menuDom.style.display = 'none';
                    }
                }
                if (targetEl.closest('.mm-icon-delete-node')) {
                    var selectNode = this.selectNode;
                    if (selectNode) {
                        selectNode.mindmap.execute("deleteNodeAndChild", { node: selectNode });
                        this._menuDom.style.display = 'none';
                    }
                }
                return;
            }
            if (targetEl.closest('.mm-node')) {
                var id = targetEl.closest('.mm-node').getAttribute('data-id');
                var node = this.getNodeById(id);
                if (!node.isSelect) {
                    this.clearSelectNode();
                    this.selectNode = node;
                    (_a = this.selectNode) === null || _a === void 0 ? void 0 : _a.select();
                    this._menuDom.style.display = 'block';
                    var box = this.selectNode.getBox();
                    this._menuDom.style.left = `${box.x + box.width + 10}px`;
                    this._menuDom.style.top = `${box.y + box.height / 2 - 14}px`;
                }
            }
            else {
                this.clearSelectNode();
                this._menuDom.style.display = 'none';
            }
        }
    }
    appDragstart(evt) {
        evt.stopPropagation();
        this.startX = evt.pageX;
        this.startY = evt.pageY;
        if (evt.target instanceof HTMLElement) {
            if (evt.target.closest('.mm-node')) {
                var id = evt.target.closest('.mm-node').getAttribute('data-id');
                this._dragNode = this.getNodeById(id);
                this.drag = true;
            }
        }
    }
    appDragend(evt) {
        this.drag = false;
        this._indicateDom.style.display = 'none';
        this._menuDom.style.display = 'none';
    }
    appDragover(evt) {
        evt.preventDefault();
        evt.stopPropagation();
        var target = evt.target;
        var x = evt.pageX;
        var y = evt.pageY;
        if (this.drag) {
            this.dx = x - this.startX;
            this.dx = y - this.startY;
        }
        if (target.closest('.mm-node')) {
            var nodeId = target.closest('.mm-node').getAttribute('data-id');
            var node = this.getNodeById(nodeId);
            var box = node.getBox();
            this._dragType = this._getDragType(node, x, y);
            this._indicateDom.style.display = 'block';
            this._indicateDom.style.left = box.x + box.width / 2 - 40 / 2 + 'px';
            this._indicateDom.style.top = box.y - 90 + 'px';
            this._indicateDom.className = 'mm-node-layout-indicate';
            if (this._dragType == 'top') {
                this._indicateDom.classList.add('mm-arrow-top');
            }
            else if (this._dragType == 'down') {
                this._indicateDom.classList.add('mm-arrow-down');
            }
            else if (this._dragType == 'left') {
                this._indicateDom.classList.add('mm-arrow-left');
            }
            else if (this._dragType == 'right') {
                this._indicateDom.classList.add('mm-arrow-right');
            }
            else {
                this._indicateDom.classList.add('drag-type');
                var arr = this._dragType.split('-');
                if (arr[1]) {
                    this._indicateDom.classList.add('mm-arrow-' + arr[1]);
                }
                else {
                    this._indicateDom.classList.add('mm-arrow-right');
                }
            }
        }
        else {
            this._indicateDom.style.display = 'none';
        }
    }
    _getDragType(node, x, y) {
        if (!node)
            return;
        var box = node.contentEl.getBoundingClientRect();
        box.x = box.x;
        box.y = box.y;
        var direct = node.direct;
        switch (direct) {
            case 'right':
                if (y < box.y + box.height / 2 && x < box.x + box.width / 4 * 3) {
                    return 'top';
                }
                if (y > box.y + box.height / 2 && x < box.x + box.width / 4 * 3) {
                    return 'down';
                }
                return 'child-right';
            case 'left':
                if (y < box.y + box.height / 2 && x > box.x + box.width / 4) {
                    return 'top';
                }
                if (y > box.y + box.height / 2 && x > box.x + box.width / 4) {
                    return 'down';
                }
                return 'child-left';
            case 'top':
            case 'up':
                if (x < box.x + box.width / 4) {
                    return 'left';
                }
                if (x > box.x + box.width / 4 * 3) {
                    return 'right';
                }
                return 'child-top';
            case 'down':
            case 'bottom':
                if (x < box.x + box.width / 4) {
                    return 'left';
                }
                if (x > box.x + box.width / 4 * 3) {
                    return 'right';
                }
                return 'child-down';
            default:
                return 'child';
        }
    }
    appDrop(evt) {
        if (evt.target instanceof HTMLElement) {
            if (evt.target.closest('.mm-node')) {
                evt.preventDefault();
                var dropNodeId = evt.target.closest('.mm-node').getAttribute('data-id');
                var dropNode = this.getNodeById(dropNodeId);
                if (this._dragNode.isRoot) ;
                else {
                    this.moveNode(this._dragNode, dropNode, this._dragType);
                }
            }
        }
        var files = evt.dataTransfer.files;
        if (files.length) {
            var f = files[0];
            if (f.name.toLowerCase().endsWith('.xmind')) {
                try {
                    var me = this;
                    var reader = new FileReader();
                    reader.onload = () => {
                        jszip_min.loadAsync(reader.result).then((e) => {
                            var files = e.files;
                            for (var k in files) {
                                if (k == "content.json") {
                                    files[k].async("text").then((res) => {
                                        var mindData = JSON.parse(res);
                                        var data = importXmind(mindData[0]);
                                        me.clearNode();
                                        me.data = data.basicData;
                                        me.init();
                                        setTimeout(() => {
                                            me.center();
                                            me.mindMapChange();
                                        }, 100);
                                    });
                                }
                            }
                        });
                    };
                    reader.readAsArrayBuffer(f);
                }
                catch (err) {
                    new obsidian.Notice('Parse xmind error');
                }
            }
        }
        this._indicateDom.style.display = 'none';
        this._menuDom.style.display = 'none';
    }
    appMouseOverFn(evt) {
        const targetEl = evt.target;
        if (targetEl.tagName !== "A")
            return;
        if (targetEl.hasClass("internal-link")) {
            this.view.app.workspace.trigger("hover-link", {
                event: evt,
                source: frontMatterKey,
                hoverParent: this.view,
                targetEl,
                linktext: targetEl.getAttr("href"),
                sourcePath: this.view.file.path,
            });
        }
    }
    appMouseMove(evt) {
        const targetEl = evt.target;
        this.scalePointer = [];
        this.scalePointer.push(evt.offsetX, evt.offsetY);
        if (targetEl.closest('.mm-node')) {
            var id = targetEl.closest('.mm-node').getAttribute('data-id');
            var node = this.getNodeById(id);
            if (node) {
                var box = node.getBox();
                this.scalePointer = [];
                this.scalePointer.push(box.x + box.width / 2, box.y + box.height / 2);
            }
        }
        else {
            if (this.drag) {
                this.containerEL.scrollLeft = this._left - (evt.pageX - this.startX);
                this.containerEL.scrollTop = this._top - (evt.pageY - this.startY);
            }
        }
    }
    appMouseDown(evt) {
        const targetEl = evt.target;
        if (!targetEl.closest('.mm-node')) {
            this.drag = true;
            this.startX = evt.pageX;
            this.startY = evt.pageY;
            this._left = this.containerEL.scrollLeft;
            this._top = this.containerEL.scrollTop;
        }
    }
    appMouseUp(evt) {
        this.drag = false;
    }
    appDblclickFn(evt) {
        var _a;
        if (evt.target instanceof HTMLElement) {
            if (evt.target.hasClass('mm-node-bar')) {
                evt.preventDefault();
                evt.stopPropagation();
                return;
            }
            if (evt.target.closest('.mm-node') instanceof HTMLElement) {
                var id = evt.target.closest('.mm-node').getAttribute('data-id');
                this.selectNode = this.getNodeById(id);
                if (!this.editNode || (this.editNode && this.editNode != this.selectNode)) {
                    (_a = this.selectNode) === null || _a === void 0 ? void 0 : _a.edit();
                    this.editNode = this.selectNode;
                    this._menuDom.style.display = 'none';
                }
            }
        }
    }
    appMousewheel(evt) {
        // if(!evt) evt = window.event;
        var ctrlKey = evt.ctrlKey || evt.metaKey;
        var delta;
        if (evt.wheelDelta) {
            //IE、chrome  -120
            delta = evt.wheelDelta / 120;
        }
        else if (evt.detail) {
            //FF 3
            delta = -evt.detail / 3;
        }
        if (delta) {
            if (delta < 0) {
                if (ctrlKey) {
                    this.setScale("down");
                }
            }
            else {
                if (ctrlKey) {
                    this.setScale("up");
                }
            }
        }
    }
    clearNode() {
        var _a;
        //delete node
        this.traverseBF((n) => {
            this.contentEL.removeChild(n.containEl);
        });
        //delete line
        if (this.mmLayout) {
            (_a = this.mmLayout.svgDom) === null || _a === void 0 ? void 0 : _a.clear();
        }
    }
    clear() {
        var _a;
        this.clearNode();
        this.removeEvent();
        (_a = this.draw) === null || _a === void 0 ? void 0 : _a.clear();
    }
    //get node list rect point
    getBoundingRect(list) {
        var box = {
            x: 0,
            y: 0,
            width: 0,
            height: 0,
            right: 0,
            bottom: 0
        };
        list.forEach((item, i) => {
            var b = item.getBox();
            // console.log(b.x,b.y);
            if (i == 0) {
                box.x = b.x;
                box.y = b.y;
                box.right = b.x + b.width;
                box.bottom = b.y + b.height;
            }
            else {
                if (b.x < box.x) {
                    box.x = b.x;
                }
                if (b.y < box.y) {
                    box.y = b.y;
                }
                if (b.x + b.width > box.right) {
                    box.right = b.x + b.width;
                }
                if (b.y + b.height > box.bottom) {
                    box.bottom = b.y + b.height;
                }
            }
        });
        box.width = box.right - box.x;
        box.height = box.bottom - box.y;
        return box;
    }
    moveNode(dragNode, dropNode, type) {
        if (dragNode == dropNode || dragNode.isRoot) {
            return;
        }
        var flag = false;
        var p = dropNode.parent;
        while (p) {
            if (p == dragNode) {
                flag = true;
                break;
            }
            p = p.parent;
        }
        if (flag) { //parent  can not change to child
            return;
        }
        dropNode.clearCacheData();
        dragNode.clearCacheData();
        if (!dropNode.isExpand) {
            dropNode.expand();
        }
        if (type == 'top' || type == 'left' || type == 'down' || type == 'right') {
            this.execute('moveNode', { type: 'siblings', node: dragNode, oldParent: dragNode.parent, dropNode, direct: type });
        }
        else if (type.indexOf('child') > -1) {
            var typeArr = type.split('-');
            if (typeArr[1]) {
                this.execute('moveNode', { type: 'child', node: dragNode, oldParent: dragNode.parent, parent: dropNode, direct: typeArr[1] });
            }
            else {
                this.execute('moveNode', { type: 'child', node: dragNode, oldParent: dragNode.parent, parent: dropNode });
            }
        }
        // this.execute('moveNode', { type: 'child', node: dragNode, oldParent: dragNode.parent, parent: dropNode })
    }
    //execute cmd , store history
    execute(name, data) {
        this.exec.execute(name, data);
    }
    undo() {
        this.exec.undo();
    }
    redo() {
        this.exec.redo();
    }
    addNode(node, parent, index = -1) {
        if (parent) {
            parent.addChild(node, index);
            if (parent.direct) {
                node.direct = parent.direct;
            }
            this._addNodeDom(node);
            node.clearCacheData();
        }
    }
    _addNodeDom(node) {
        this.traverseBF((n) => {
            if (!this.contentEL.contains(n.containEl)) {
                this.contentEL.appendChild(n.containEl);
            }
        }, node);
    }
    removeNode(node) {
        if (node.parent) {
            var p = node.parent;
            var i = node.parent.removeChild(node);
            this._removeChildDom(node);
            p.clearCacheData();
            return i;
        }
        else {
            this._removeChildDom(node);
            return -1;
        }
    }
    _removeChildDom(node) {
        this.traverseBF((n) => {
            if (this.contentEL.contains(n.containEl)) {
                this.contentEL.removeChild(n.containEl);
            }
        }, node);
    }
    //layout
    layout() {
        if (!this.mmLayout) {
            this.mmLayout = new Layout(this.root, this.setting.layoutDirect || 'mind map', this.colors);
            return;
        }
        this.mmLayout.layout(this.root, this.setting.layoutDirect || this.mmLayout.direct || 'mind map');
    }
    refresh() {
        this.layout();
    }
    emit(name, data) {
        var evt = new CustomEvent(name, {
            detail: data || {}
        });
        this.appEl.dispatchEvent(evt);
    }
    on(name, fn) {
        this.appEl.addEventListener(name, fn);
    }
    off(name, fn) {
        if (name && fn) {
            this.appEl.removeEventListener(name, fn);
        }
    }
    center() {
        this._setMindScalePointer();
        var oldScale = this.mindScale;
        this.scale(100);
        var w = this.containerEL.clientWidth;
        var h = this.containerEL.clientHeight;
        this.containerEL.scrollTop = this.setting.canvasSize / 2 - h / 2 - 60;
        this.containerEL.scrollLeft = this.setting.canvasSize / 2 - w / 2 + 30;
        this.scale(oldScale);
    }
    _setMindScalePointer() {
        this.scalePointer = [];
        var root = this.root;
        if (root) {
            var rbox = root.getBox();
            this.scalePointer.push(rbox.x + rbox.width / 2, rbox.y + rbox.height / 2);
        }
    }
    getMarkdown() {
        var md = '';
        var level = this.setting.headLevel;
        this.traverseDF((n) => {
            var l = n.getLevel() + 1;
            var hPrefix = '', space = '';
            if (l > 1) {
                hPrefix = '\n';
            }
            const ending = n.isExpand ? '' : ` ^${n.getId()}`;
            if (n.getLevel() < level) {
                for (let i = 0; i < l; i++) {
                    hPrefix += '#';
                }
                md += (hPrefix + ' ');
                md += n.getData().text.trim() + ending + '\n';
            }
            else {
                for (var i = 0; i < n.getLevel() - level; i++) {
                    space += '\t';
                }
                var text = n.getData().text.trim();
                if (text) {
                    var textArr = text.split('\n');
                    var lineLength = textArr.length;
                    if (lineLength == 1) {
                        md += `${space}- ${text}${ending}\n`;
                    }
                    else if (lineLength > 1) {
                        //code
                        if (text.startsWith('```')) {
                            md += '\n';
                            md += `${space}-\n`;
                            textArr.forEach((t, i) => {
                                md += `${space}  ${t.trim()}${i === textArr.length - 1 ? ending : ''}\n`;
                            });
                            md += '\n';
                        }
                        else {
                            //text
                            md += `${space}- `;
                            textArr.forEach((t, i) => {
                                var contentText = "void";
                                if (t.trim().length > 0) {
                                    contentText = t.trim();
                                }
                                if (i > 0) {
                                    md += `${space}${contentText}${i === textArr.length - 1 ? ending : ''}\n`;
                                }
                                else {
                                    md += `${contentText}\n`;
                                }
                            });
                        }
                    }
                }
                else {
                    for (var i = 0; i < n.getLevel() - level; i++) {
                        space += '\t';
                    }
                    md += `${space}-\n`;
                }
            }
        }, this.root, true);
        return md.trim();
    }
    scale(num) {
        if (num < 20) {
            num = 20;
        }
        if (num > 300) {
            num = 300;
        }
        this.mindScale = num;
        if (this.scalePointer.length) {
            this.appEl.style.transformOrigin = `${this.scalePointer[0]}px ${this.scalePointer[1]}px`;
            this.appEl.style.transform = "scale(" + this.mindScale / 100 + ")";
        }
        else {
            this.appEl.style.transform = "scale(" + this.mindScale / 100 + ")";
        }
    }
    setScale(type) {
        if (type == "up") {
            var n = this.mindScale + 10;
        }
        else {
            var n = this.mindScale - 10;
        }
        this.scale(n);
        if (this.timeOut) {
            clearTimeout(this.timeOut);
        }
        this.timeOut = setTimeout(() => {
            new obsidian.Notice(`${n} %`);
        }, 600);
    }
    copyNode(node) {
        var n = node || this.selectNode;
        if (n) {
            var data = [];
            function copyNode(n, pid) {
                var d = n.getData();
                d.id = uuid();
                d.pid = pid;
                data.push({
                    id: d.id,
                    text: d.text,
                    pid: pid,
                    isExpand: d.isExpand,
                    note: d.note
                });
                n.children.forEach((c) => {
                    copyNode(c, d.id);
                });
            }
            copyNode(n, null);
            var _data = {
                type: 'copyNode',
                text: data
            };
            return JSON.stringify(_data);
        }
        else {
            return '';
        }
    }
    pasteNode(text) {
        var node = this.selectNode;
        if (text) {
            try {
                var json = JSON.parse(text);
                if (json.type && json.type == 'copyNode') {
                    var data = json.text;
                    if (!node.isExpand) {
                        node.expand();
                        node.clearCacheData();
                    }
                    this.execute('pasteNode', {
                        node: node,
                        data: data
                    });
                    navigator.clipboard.writeText('');
                }
            }
            catch (err) {
                console.log(err);
            }
        }
    }
}

var katex = createCommonjsModule(function (module, exports) {
(function webpackUniversalModuleDefinition(root, factory) {
	module.exports = factory();
})((typeof self !== 'undefined' ? self : commonjsGlobal), function() {
return /******/ (function() { // webpackBootstrap
/******/ 	// The require scope
/******/ 	var __webpack_require__ = {};
/******/ 	
/************************************************************************/
/******/ 	/* webpack/runtime/define property getters */
/******/ 	!function() {
/******/ 		// define getter functions for harmony exports
/******/ 		__webpack_require__.d = function(exports, definition) {
/******/ 			for(var key in definition) {
/******/ 				if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
/******/ 					Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
/******/ 				}
/******/ 			}
/******/ 		};
/******/ 	}();
/******/ 	
/******/ 	/* webpack/runtime/hasOwnProperty shorthand */
/******/ 	!function() {
/******/ 		__webpack_require__.o = function(obj, prop) { return Object.prototype.hasOwnProperty.call(obj, prop); };
/******/ 	}();
/******/ 	
/************************************************************************/
var __webpack_exports__ = {};

// EXPORTS
__webpack_require__.d(__webpack_exports__, {
  "default": function() { return /* binding */ katex_webpack; }
});


/**
 * This is the ParseError class, which is the main error thrown by KaTeX
 * functions when something has gone wrong. This is used to distinguish internal
 * errors from errors in the expression that the user provided.
 *
 * If possible, a caller should provide a Token or ParseNode with information
 * about where in the source string the problem occurred.
 */
var ParseError = // Error position based on passed-in Token or ParseNode.
function ParseError(message, // The error message
token // An object providing position information
) {
  this.position = void 0;
  var error = "KaTeX parse error: " + message;
  var start;
  var loc = token && token.loc;

  if (loc && loc.start <= loc.end) {
    // If we have the input and a position, make the error a bit fancier
    // Get the input
    var input = loc.lexer.input; // Prepend some information

    start = loc.start;
    var end = loc.end;

    if (start === input.length) {
      error += " at end of input: ";
    } else {
      error += " at position " + (start + 1) + ": ";
    } // Underline token in question using combining underscores


    var underlined = input.slice(start, end).replace(/[^]/g, "$&\u0332"); // Extract some context from the input and add it to the error

    var left;

    if (start > 15) {
      left = "…" + input.slice(start - 15, start);
    } else {
      left = input.slice(0, start);
    }

    var right;

    if (end + 15 < input.length) {
      right = input.slice(end, end + 15) + "…";
    } else {
      right = input.slice(end);
    }

    error += left + underlined + right;
  } // Some hackery to make ParseError a prototype of Error
  // See http://stackoverflow.com/a/8460753


  var self = new Error(error);
  self.name = "ParseError"; // $FlowFixMe

  self.__proto__ = ParseError.prototype; // $FlowFixMe

  self.position = start;
  return self;
}; // $FlowFixMe More hackery


ParseError.prototype.__proto__ = Error.prototype;
/* harmony default export */ var src_ParseError = (ParseError);
/**
 * This file contains a list of utility functions which are useful in other
 * files.
 */

/**
 * Return whether an element is contained in a list
 */
var contains = function contains(list, elem) {
  return list.indexOf(elem) !== -1;
};
/**
 * Provide a default value if a setting is undefined
 * NOTE: Couldn't use `T` as the output type due to facebook/flow#5022.
 */


var deflt = function deflt(setting, defaultIfUndefined) {
  return setting === undefined ? defaultIfUndefined : setting;
}; // hyphenate and escape adapted from Facebook's React under Apache 2 license


var uppercase = /([A-Z])/g;

var hyphenate = function hyphenate(str) {
  return str.replace(uppercase, "-$1").toLowerCase();
};

var ESCAPE_LOOKUP = {
  "&": "&amp;",
  ">": "&gt;",
  "<": "&lt;",
  "\"": "&quot;",
  "'": "&#x27;"
};
var ESCAPE_REGEX = /[&><"']/g;
/**
 * Escapes text to prevent scripting attacks.
 */

function utils_escape(text) {
  return String(text).replace(ESCAPE_REGEX, function (match) {
    return ESCAPE_LOOKUP[match];
  });
}
/**
 * Sometimes we want to pull out the innermost element of a group. In most
 * cases, this will just be the group itself, but when ordgroups and colors have
 * a single element, we want to pull that out.
 */


var getBaseElem = function getBaseElem(group) {
  if (group.type === "ordgroup") {
    if (group.body.length === 1) {
      return getBaseElem(group.body[0]);
    } else {
      return group;
    }
  } else if (group.type === "color") {
    if (group.body.length === 1) {
      return getBaseElem(group.body[0]);
    } else {
      return group;
    }
  } else if (group.type === "font") {
    return getBaseElem(group.body);
  } else {
    return group;
  }
};
/**
 * TeXbook algorithms often reference "character boxes", which are simply groups
 * with a single character in them. To decide if something is a character box,
 * we find its innermost group, and see if it is a single character.
 */


var isCharacterBox = function isCharacterBox(group) {
  var baseElem = getBaseElem(group); // These are all they types of groups which hold single characters

  return baseElem.type === "mathord" || baseElem.type === "textord" || baseElem.type === "atom";
};

var assert = function assert(value) {
  if (!value) {
    throw new Error('Expected non-null, but got ' + String(value));
  }

  return value;
};
/**
 * Return the protocol of a URL, or "_relative" if the URL does not specify a
 * protocol (and thus is relative).
 */

var protocolFromUrl = function protocolFromUrl(url) {
  var protocol = /^\s*([^\\/#]*?)(?::|&#0*58|&#x0*3a)/i.exec(url);
  return protocol != null ? protocol[1] : "_relative";
};
/* harmony default export */ var utils = ({
  contains: contains,
  deflt: deflt,
  escape: utils_escape,
  hyphenate: hyphenate,
  getBaseElem: getBaseElem,
  isCharacterBox: isCharacterBox,
  protocolFromUrl: protocolFromUrl
});
/* eslint no-console:0 */

/**
 * This is a module for storing settings passed into KaTeX. It correctly handles
 * default settings.
 */




/**
 * The main Settings object
 *
 * The current options stored are:
 *  - displayMode: Whether the expression should be typeset as inline math
 *                 (false, the default), meaning that the math starts in
 *                 \textstyle and is placed in an inline-block); or as display
 *                 math (true), meaning that the math starts in \displaystyle
 *                 and is placed in a block with vertical margin.
 */
var Settings = /*#__PURE__*/function () {
  function Settings(options) {
    this.displayMode = void 0;
    this.output = void 0;
    this.leqno = void 0;
    this.fleqn = void 0;
    this.throwOnError = void 0;
    this.errorColor = void 0;
    this.macros = void 0;
    this.minRuleThickness = void 0;
    this.colorIsTextColor = void 0;
    this.strict = void 0;
    this.trust = void 0;
    this.maxSize = void 0;
    this.maxExpand = void 0;
    this.globalGroup = void 0;
    // allow null options
    options = options || {};
    this.displayMode = utils.deflt(options.displayMode, false);
    this.output = utils.deflt(options.output, "htmlAndMathml");
    this.leqno = utils.deflt(options.leqno, false);
    this.fleqn = utils.deflt(options.fleqn, false);
    this.throwOnError = utils.deflt(options.throwOnError, true);
    this.errorColor = utils.deflt(options.errorColor, "#cc0000");
    this.macros = options.macros || {};
    this.minRuleThickness = Math.max(0, utils.deflt(options.minRuleThickness, 0));
    this.colorIsTextColor = utils.deflt(options.colorIsTextColor, false);
    this.strict = utils.deflt(options.strict, "warn");
    this.trust = utils.deflt(options.trust, false);
    this.maxSize = Math.max(0, utils.deflt(options.maxSize, Infinity));
    this.maxExpand = Math.max(0, utils.deflt(options.maxExpand, 1000));
    this.globalGroup = utils.deflt(options.globalGroup, false);
  }
  /**
   * Report nonstrict (non-LaTeX-compatible) input.
   * Can safely not be called if `this.strict` is false in JavaScript.
   */


  var _proto = Settings.prototype;

  _proto.reportNonstrict = function reportNonstrict(errorCode, errorMsg, token) {
    var strict = this.strict;

    if (typeof strict === "function") {
      // Allow return value of strict function to be boolean or string
      // (or null/undefined, meaning no further processing).
      strict = strict(errorCode, errorMsg, token);
    }

    if (!strict || strict === "ignore") {
      return;
    } else if (strict === true || strict === "error") {
      throw new src_ParseError("LaTeX-incompatible input and strict mode is set to 'error': " + (errorMsg + " [" + errorCode + "]"), token);
    } else if (strict === "warn") {
      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to 'warn': " + (errorMsg + " [" + errorCode + "]"));
    } else {
      // won't happen in type-safe code
      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to " + ("unrecognized '" + strict + "': " + errorMsg + " [" + errorCode + "]"));
    }
  }
  /**
   * Check whether to apply strict (LaTeX-adhering) behavior for unusual
   * input (like `\\`).  Unlike `nonstrict`, will not throw an error;
   * instead, "error" translates to a return value of `true`, while "ignore"
   * translates to a return value of `false`.  May still print a warning:
   * "warn" prints a warning and returns `false`.
   * This is for the second category of `errorCode`s listed in the README.
   */
  ;

  _proto.useStrictBehavior = function useStrictBehavior(errorCode, errorMsg, token) {
    var strict = this.strict;

    if (typeof strict === "function") {
      // Allow return value of strict function to be boolean or string
      // (or null/undefined, meaning no further processing).
      // But catch any exceptions thrown by function, treating them
      // like "error".
      try {
        strict = strict(errorCode, errorMsg, token);
      } catch (error) {
        strict = "error";
      }
    }

    if (!strict || strict === "ignore") {
      return false;
    } else if (strict === true || strict === "error") {
      return true;
    } else if (strict === "warn") {
      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to 'warn': " + (errorMsg + " [" + errorCode + "]"));
      return false;
    } else {
      // won't happen in type-safe code
      typeof console !== "undefined" && console.warn("LaTeX-incompatible input and strict mode is set to " + ("unrecognized '" + strict + "': " + errorMsg + " [" + errorCode + "]"));
      return false;
    }
  }
  /**
   * Check whether to test potentially dangerous input, and return
   * `true` (trusted) or `false` (untrusted).  The sole argument `context`
   * should be an object with `command` field specifying the relevant LaTeX
   * command (as a string starting with `\`), and any other arguments, etc.
   * If `context` has a `url` field, a `protocol` field will automatically
   * get added by this function (changing the specified object).
   */
  ;

  _proto.isTrusted = function isTrusted(context) {
    if (context.url && !context.protocol) {
      context.protocol = utils.protocolFromUrl(context.url);
    }

    var trust = typeof this.trust === "function" ? this.trust(context) : this.trust;
    return Boolean(trust);
  };

  return Settings;
}();
/**
 * This file contains information and classes for the various kinds of styles
 * used in TeX. It provides a generic `Style` class, which holds information
 * about a specific style. It then provides instances of all the different kinds
 * of styles possible, and provides functions to move between them and get
 * information about them.
 */

/**
 * The main style class. Contains a unique id for the style, a size (which is
 * the same for cramped and uncramped version of a style), and a cramped flag.
 */
var Style = /*#__PURE__*/function () {
  function Style(id, size, cramped) {
    this.id = void 0;
    this.size = void 0;
    this.cramped = void 0;
    this.id = id;
    this.size = size;
    this.cramped = cramped;
  }
  /**
   * Get the style of a superscript given a base in the current style.
   */


  var _proto = Style.prototype;

  _proto.sup = function sup() {
    return styles[_sup[this.id]];
  }
  /**
   * Get the style of a subscript given a base in the current style.
   */
  ;

  _proto.sub = function sub() {
    return styles[_sub[this.id]];
  }
  /**
   * Get the style of a fraction numerator given the fraction in the current
   * style.
   */
  ;

  _proto.fracNum = function fracNum() {
    return styles[_fracNum[this.id]];
  }
  /**
   * Get the style of a fraction denominator given the fraction in the current
   * style.
   */
  ;

  _proto.fracDen = function fracDen() {
    return styles[_fracDen[this.id]];
  }
  /**
   * Get the cramped version of a style (in particular, cramping a cramped style
   * doesn't change the style).
   */
  ;

  _proto.cramp = function cramp() {
    return styles[_cramp[this.id]];
  }
  /**
   * Get a text or display version of this style.
   */
  ;

  _proto.text = function text() {
    return styles[_text[this.id]];
  }
  /**
   * Return true if this style is tightly spaced (scriptstyle/scriptscriptstyle)
   */
  ;

  _proto.isTight = function isTight() {
    return this.size >= 2;
  };

  return Style;
}(); // Export an interface for type checking, but don't expose the implementation.
// This way, no more styles can be generated.


// IDs of the different styles
var D = 0;
var Dc = 1;
var T = 2;
var Tc = 3;
var S = 4;
var Sc = 5;
var SS = 6;
var SSc = 7; // Instances of the different styles

var styles = [new Style(D, 0, false), new Style(Dc, 0, true), new Style(T, 1, false), new Style(Tc, 1, true), new Style(S, 2, false), new Style(Sc, 2, true), new Style(SS, 3, false), new Style(SSc, 3, true)]; // Lookup tables for switching from one style to another

var _sup = [S, Sc, S, Sc, SS, SSc, SS, SSc];
var _sub = [Sc, Sc, Sc, Sc, SSc, SSc, SSc, SSc];
var _fracNum = [T, Tc, S, Sc, SS, SSc, SS, SSc];
var _fracDen = [Tc, Tc, Sc, Sc, SSc, SSc, SSc, SSc];
var _cramp = [Dc, Dc, Tc, Tc, Sc, Sc, SSc, SSc];
var _text = [D, Dc, T, Tc, T, Tc, T, Tc]; // We only export some of the styles.

/* harmony default export */ var src_Style = ({
  DISPLAY: styles[D],
  TEXT: styles[T],
  SCRIPT: styles[S],
  SCRIPTSCRIPT: styles[SS]
});
/*
 * This file defines the Unicode scripts and script families that we
 * support. To add new scripts or families, just add a new entry to the
 * scriptData array below. Adding scripts to the scriptData array allows
 * characters from that script to appear in \text{} environments.
 */

/**
 * Each script or script family has a name and an array of blocks.
 * Each block is an array of two numbers which specify the start and
 * end points (inclusive) of a block of Unicode codepoints.
 */

/**
 * Unicode block data for the families of scripts we support in \text{}.
 * Scripts only need to appear here if they do not have font metrics.
 */
var scriptData = [{
  // Latin characters beyond the Latin-1 characters we have metrics for.
  // Needed for Czech, Hungarian and Turkish text, for example.
  name: 'latin',
  blocks: [[0x0100, 0x024f], // Latin Extended-A and Latin Extended-B
  [0x0300, 0x036f] // Combining Diacritical marks
  ]
}, {
  // The Cyrillic script used by Russian and related languages.
  // A Cyrillic subset used to be supported as explicitly defined
  // symbols in symbols.js
  name: 'cyrillic',
  blocks: [[0x0400, 0x04ff]]
}, {
  // Armenian
  name: 'armenian',
  blocks: [[0x0530, 0x058F]]
}, {
  // The Brahmic scripts of South and Southeast Asia
  // Devanagari (0900–097F)
  // Bengali (0980–09FF)
  // Gurmukhi (0A00–0A7F)
  // Gujarati (0A80–0AFF)
  // Oriya (0B00–0B7F)
  // Tamil (0B80–0BFF)
  // Telugu (0C00–0C7F)
  // Kannada (0C80–0CFF)
  // Malayalam (0D00–0D7F)
  // Sinhala (0D80–0DFF)
  // Thai (0E00–0E7F)
  // Lao (0E80–0EFF)
  // Tibetan (0F00–0FFF)
  // Myanmar (1000–109F)
  name: 'brahmic',
  blocks: [[0x0900, 0x109F]]
}, {
  name: 'georgian',
  blocks: [[0x10A0, 0x10ff]]
}, {
  // Chinese and Japanese.
  // The "k" in cjk is for Korean, but we've separated Korean out
  name: "cjk",
  blocks: [[0x3000, 0x30FF], // CJK symbols and punctuation, Hiragana, Katakana
  [0x4E00, 0x9FAF], // CJK ideograms
  [0xFF00, 0xFF60] // Fullwidth punctuation
  // TODO: add halfwidth Katakana and Romanji glyphs
  ]
}, {
  // Korean
  name: 'hangul',
  blocks: [[0xAC00, 0xD7AF]]
}];
/**
 * Given a codepoint, return the name of the script or script family
 * it is from, or null if it is not part of a known block
 */

function scriptFromCodepoint(codepoint) {
  for (var i = 0; i < scriptData.length; i++) {
    var script = scriptData[i];

    for (var _i = 0; _i < script.blocks.length; _i++) {
      var block = script.blocks[_i];

      if (codepoint >= block[0] && codepoint <= block[1]) {
        return script.name;
      }
    }
  }

  return null;
}
/**
 * A flattened version of all the supported blocks in a single array.
 * This is an optimization to make supportedCodepoint() fast.
 */

var allBlocks = [];
scriptData.forEach(function (s) {
  return s.blocks.forEach(function (b) {
    return allBlocks.push.apply(allBlocks, b);
  });
});
/**
 * Given a codepoint, return true if it falls within one of the
 * scripts or script families defined above and false otherwise.
 *
 * Micro benchmarks shows that this is faster than
 * /[\u3000-\u30FF\u4E00-\u9FAF\uFF00-\uFF60\uAC00-\uD7AF\u0900-\u109F]/.test()
 * in Firefox, Chrome and Node.
 */

function supportedCodepoint(codepoint) {
  for (var i = 0; i < allBlocks.length; i += 2) {
    if (codepoint >= allBlocks[i] && codepoint <= allBlocks[i + 1]) {
      return true;
    }
  }

  return false;
}
/**
 * This file provides support to domTree.js and delimiter.js.
 * It's a storehouse of path geometry for SVG images.
 */
// In all paths below, the viewBox-to-em scale is 1000:1.
var hLinePad = 80; // padding above a sqrt viniculum. Prevents image cropping.
// The viniculum of a \sqrt can be made thicker by a KaTeX rendering option.
// Think of variable extraViniculum as two detours in the SVG path.
// The detour begins at the lower left of the area labeled extraViniculum below.
// The detour proceeds one extraViniculum distance up and slightly to the right,
// displacing the radiused corner between surd and viniculum. The radius is
// traversed as usual, then the detour resumes. It goes right, to the end of
// the very long viniculumn, then down one extraViniculum distance,
// after which it resumes regular path geometry for the radical.

/*                                                  viniculum
                                                   /
         /▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒←extraViniculum
        / █████████████████████←0.04em (40 unit) std viniculum thickness
       / /
      / /
     / /\
    / / surd
*/

var sqrtMain = function sqrtMain(extraViniculum, hLinePad) {
  // sqrtMain path geometry is from glyph U221A in the font KaTeX Main
  return "M95," + (622 + extraViniculum + hLinePad) + "\nc-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5,-10,-9.5,-14\nc0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54\nc44.2,-33.3,65.8,-50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10\ns173,378,173,378c0.7,0,35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429\nc69,-144,104.5,-217.7,106.5,-221\nl" + extraViniculum / 2.075 + " -" + extraViniculum + "\nc5.3,-9.3,12,-14,20,-14\nH400000v" + (40 + extraViniculum) + "H845.2724\ns-225.272,467,-225.272,467s-235,486,-235,486c-2.7,4.7,-9,7,-19,7\nc-6,0,-10,-1,-12,-3s-194,-422,-194,-422s-65,47,-65,47z\nM" + (834 + extraViniculum) + " " + hLinePad + "h400000v" + (40 + extraViniculum) + "h-400000z";
};

var sqrtSize1 = function sqrtSize1(extraViniculum, hLinePad) {
  // size1 is from glyph U221A in the font KaTeX_Size1-Regular
  return "M263," + (601 + extraViniculum + hLinePad) + "c0.7,0,18,39.7,52,119\nc34,79.3,68.167,158.7,102.5,238c34.3,79.3,51.8,119.3,52.5,120\nc340,-704.7,510.7,-1060.3,512,-1067\nl" + extraViniculum / 2.084 + " -" + extraViniculum + "\nc4.7,-7.3,11,-11,19,-11\nH40000v" + (40 + extraViniculum) + "H1012.3\ns-271.3,567,-271.3,567c-38.7,80.7,-84,175,-136,283c-52,108,-89.167,185.3,-111.5,232\nc-22.3,46.7,-33.8,70.3,-34.5,71c-4.7,4.7,-12.3,7,-23,7s-12,-1,-12,-1\ns-109,-253,-109,-253c-72.7,-168,-109.3,-252,-110,-252c-10.7,8,-22,16.7,-34,26\nc-22,17.3,-33.3,26,-34,26s-26,-26,-26,-26s76,-59,76,-59s76,-60,76,-60z\nM" + (1001 + extraViniculum) + " " + hLinePad + "h400000v" + (40 + extraViniculum) + "h-400000z";
};

var sqrtSize2 = function sqrtSize2(extraViniculum, hLinePad) {
  // size2 is from glyph U221A in the font KaTeX_Size2-Regular
  return "M983 " + (10 + extraViniculum + hLinePad) + "\nl" + extraViniculum / 3.13 + " -" + extraViniculum + "\nc4,-6.7,10,-10,18,-10 H400000v" + (40 + extraViniculum) + "\nH1013.1s-83.4,268,-264.1,840c-180.7,572,-277,876.3,-289,913c-4.7,4.7,-12.7,7,-24,7\ns-12,0,-12,0c-1.3,-3.3,-3.7,-11.7,-7,-25c-35.3,-125.3,-106.7,-373.3,-214,-744\nc-10,12,-21,25,-33,39s-32,39,-32,39c-6,-5.3,-15,-14,-27,-26s25,-30,25,-30\nc26.7,-32.7,52,-63,76,-91s52,-60,52,-60s208,722,208,722\nc56,-175.3,126.3,-397.3,211,-666c84.7,-268.7,153.8,-488.2,207.5,-658.5\nc53.7,-170.3,84.5,-266.8,92.5,-289.5z\nM" + (1001 + extraViniculum) + " " + hLinePad + "h400000v" + (40 + extraViniculum) + "h-400000z";
};

var sqrtSize3 = function sqrtSize3(extraViniculum, hLinePad) {
  // size3 is from glyph U221A in the font KaTeX_Size3-Regular
  return "M424," + (2398 + extraViniculum + hLinePad) + "\nc-1.3,-0.7,-38.5,-172,-111.5,-514c-73,-342,-109.8,-513.3,-110.5,-514\nc0,-2,-10.7,14.3,-32,49c-4.7,7.3,-9.8,15.7,-15.5,25c-5.7,9.3,-9.8,16,-12.5,20\ns-5,7,-5,7c-4,-3.3,-8.3,-7.7,-13,-13s-13,-13,-13,-13s76,-122,76,-122s77,-121,77,-121\ns209,968,209,968c0,-2,84.7,-361.7,254,-1079c169.3,-717.3,254.7,-1077.7,256,-1081\nl" + extraViniculum / 4.223 + " -" + extraViniculum + "c4,-6.7,10,-10,18,-10 H400000\nv" + (40 + extraViniculum) + "H1014.6\ns-87.3,378.7,-272.6,1166c-185.3,787.3,-279.3,1182.3,-282,1185\nc-2,6,-10,9,-24,9\nc-8,0,-12,-0.7,-12,-2z M" + (1001 + extraViniculum) + " " + hLinePad + "\nh400000v" + (40 + extraViniculum) + "h-400000z";
};

var sqrtSize4 = function sqrtSize4(extraViniculum, hLinePad) {
  // size4 is from glyph U221A in the font KaTeX_Size4-Regular
  return "M473," + (2713 + extraViniculum + hLinePad) + "\nc339.3,-1799.3,509.3,-2700,510,-2702 l" + extraViniculum / 5.298 + " -" + extraViniculum + "\nc3.3,-7.3,9.3,-11,18,-11 H400000v" + (40 + extraViniculum) + "H1017.7\ns-90.5,478,-276.2,1466c-185.7,988,-279.5,1483,-281.5,1485c-2,6,-10,9,-24,9\nc-8,0,-12,-0.7,-12,-2c0,-1.3,-5.3,-32,-16,-92c-50.7,-293.3,-119.7,-693.3,-207,-1200\nc0,-1.3,-5.3,8.7,-16,30c-10.7,21.3,-21.3,42.7,-32,64s-16,33,-16,33s-26,-26,-26,-26\ns76,-153,76,-153s77,-151,77,-151c0.7,0.7,35.7,202,105,604c67.3,400.7,102,602.7,104,\n606zM" + (1001 + extraViniculum) + " " + hLinePad + "h400000v" + (40 + extraViniculum) + "H1017.7z";
};

var phasePath = function phasePath(y) {
  var x = y / 2; // x coordinate at top of angle

  return "M400000 " + y + " H0 L" + x + " 0 l65 45 L145 " + (y - 80) + " H400000z";
};

var sqrtTall = function sqrtTall(extraViniculum, hLinePad, viewBoxHeight) {
  // sqrtTall is from glyph U23B7 in the font KaTeX_Size4-Regular
  // One path edge has a variable length. It runs vertically from the viniculumn
  // to a point near (14 units) the bottom of the surd. The viniculum
  // is normally 40 units thick. So the length of the line in question is:
  var vertSegment = viewBoxHeight - 54 - hLinePad - extraViniculum;
  return "M702 " + (extraViniculum + hLinePad) + "H400000" + (40 + extraViniculum) + "\nH742v" + vertSegment + "l-4 4-4 4c-.667.7 -2 1.5-4 2.5s-4.167 1.833-6.5 2.5-5.5 1-9.5 1\nh-12l-28-84c-16.667-52-96.667 -294.333-240-727l-212 -643 -85 170\nc-4-3.333-8.333-7.667-13 -13l-13-13l77-155 77-156c66 199.333 139 419.667\n219 661 l218 661zM702 " + hLinePad + "H400000v" + (40 + extraViniculum) + "H742z";
};

var sqrtPath = function sqrtPath(size, extraViniculum, viewBoxHeight) {
  extraViniculum = 1000 * extraViniculum; // Convert from document ems to viewBox.

  var path = "";

  switch (size) {
    case "sqrtMain":
      path = sqrtMain(extraViniculum, hLinePad);
      break;

    case "sqrtSize1":
      path = sqrtSize1(extraViniculum, hLinePad);
      break;

    case "sqrtSize2":
      path = sqrtSize2(extraViniculum, hLinePad);
      break;

    case "sqrtSize3":
      path = sqrtSize3(extraViniculum, hLinePad);
      break;

    case "sqrtSize4":
      path = sqrtSize4(extraViniculum, hLinePad);
      break;

    case "sqrtTall":
      path = sqrtTall(extraViniculum, hLinePad, viewBoxHeight);
  }

  return path;
};
var innerPath = function innerPath(name, height) {
  // The inner part of stretchy tall delimiters
  switch (name) {
    case "\u239C":
      return "M291 0 H417 V" + height + " H291z M291 0 H417 V" + height + " H291z";

    case "\u2223":
      return "M145 0 H188 V" + height + " H145z M145 0 H188 V" + height + " H145z";

    case "\u2225":
      return "M145 0 H188 V" + height + " H145z M145 0 H188 V" + height + " H145z" + ("M367 0 H410 V" + height + " H367z M367 0 H410 V" + height + " H367z");

    case "\u239F":
      return "M457 0 H583 V" + height + " H457z M457 0 H583 V" + height + " H457z";

    case "\u23A2":
      return "M319 0 H403 V" + height + " H319z M319 0 H403 V" + height + " H319z";

    case "\u23A5":
      return "M263 0 H347 V" + height + " H263z M263 0 H347 V" + height + " H263z";

    case "\u23AA":
      return "M384 0 H504 V" + height + " H384z M384 0 H504 V" + height + " H384z";

    case "\u23D0":
      return "M312 0 H355 V" + height + " H312z M312 0 H355 V" + height + " H312z";

    case "\u2016":
      return "M257 0 H300 V" + height + " H257z M257 0 H300 V" + height + " H257z" + ("M478 0 H521 V" + height + " H478z M478 0 H521 V" + height + " H478z");

    default:
      return "";
  }
};
var path = {
  // The doubleleftarrow geometry is from glyph U+21D0 in the font KaTeX Main
  doubleleftarrow: "M262 157\nl10-10c34-36 62.7-77 86-123 3.3-8 5-13.3 5-16 0-5.3-6.7-8-20-8-7.3\n 0-12.2.5-14.5 1.5-2.3 1-4.8 4.5-7.5 10.5-49.3 97.3-121.7 169.3-217 216-28\n 14-57.3 25-88 33-6.7 2-11 3.8-13 5.5-2 1.7-3 4.2-3 7.5s1 5.8 3 7.5\nc2 1.7 6.3 3.5 13 5.5 68 17.3 128.2 47.8 180.5 91.5 52.3 43.7 93.8 96.2 124.5\n 157.5 9.3 8 15.3 12.3 18 13h6c12-.7 18-4 18-10 0-2-1.7-7-5-15-23.3-46-52-87\n-86-123l-10-10h399738v-40H218c328 0 0 0 0 0l-10-8c-26.7-20-65.7-43-117-69 2.7\n-2 6-3.7 10-5 36.7-16 72.3-37.3 107-64l10-8h399782v-40z\nm8 0v40h399730v-40zm0 194v40h399730v-40z",
  // doublerightarrow is from glyph U+21D2 in font KaTeX Main
  doublerightarrow: "M399738 392l\n-10 10c-34 36-62.7 77-86 123-3.3 8-5 13.3-5 16 0 5.3 6.7 8 20 8 7.3 0 12.2-.5\n 14.5-1.5 2.3-1 4.8-4.5 7.5-10.5 49.3-97.3 121.7-169.3 217-216 28-14 57.3-25 88\n-33 6.7-2 11-3.8 13-5.5 2-1.7 3-4.2 3-7.5s-1-5.8-3-7.5c-2-1.7-6.3-3.5-13-5.5-68\n-17.3-128.2-47.8-180.5-91.5-52.3-43.7-93.8-96.2-124.5-157.5-9.3-8-15.3-12.3-18\n-13h-6c-12 .7-18 4-18 10 0 2 1.7 7 5 15 23.3 46 52 87 86 123l10 10H0v40h399782\nc-328 0 0 0 0 0l10 8c26.7 20 65.7 43 117 69-2.7 2-6 3.7-10 5-36.7 16-72.3 37.3\n-107 64l-10 8H0v40zM0 157v40h399730v-40zm0 194v40h399730v-40z",
  // leftarrow is from glyph U+2190 in font KaTeX Main
  leftarrow: "M400000 241H110l3-3c68.7-52.7 113.7-120\n 135-202 4-14.7 6-23 6-25 0-7.3-7-11-21-11-8 0-13.2.8-15.5 2.5-2.3 1.7-4.2 5.8\n-5.5 12.5-1.3 4.7-2.7 10.3-4 17-12 48.7-34.8 92-68.5 130S65.3 228.3 18 247\nc-10 4-16 7.7-18 11 0 8.7 6 14.3 18 17 47.3 18.7 87.8 47 121.5 85S196 441.3 208\n 490c.7 2 1.3 5 2 9s1.2 6.7 1.5 8c.3 1.3 1 3.3 2 6s2.2 4.5 3.5 5.5c1.3 1 3.3\n 1.8 6 2.5s6 1 10 1c14 0 21-3.7 21-11 0-2-2-10.3-6-25-20-79.3-65-146.7-135-202\n l-3-3h399890zM100 241v40h399900v-40z",
  // overbrace is from glyphs U+23A9/23A8/23A7 in font KaTeX_Size4-Regular
  leftbrace: "M6 548l-6-6v-35l6-11c56-104 135.3-181.3 238-232 57.3-28.7 117\n-45 179-50h399577v120H403c-43.3 7-81 15-113 26-100.7 33-179.7 91-237 174-2.7\n 5-6 9-10 13-.7 1-7.3 1-20 1H6z",
  leftbraceunder: "M0 6l6-6h17c12.688 0 19.313.3 20 1 4 4 7.313 8.3 10 13\n 35.313 51.3 80.813 93.8 136.5 127.5 55.688 33.7 117.188 55.8 184.5 66.5.688\n 0 2 .3 4 1 18.688 2.7 76 4.3 172 5h399450v120H429l-6-1c-124.688-8-235-61.7\n-331-161C60.687 138.7 32.312 99.3 7 54L0 41V6z",
  // overgroup is from the MnSymbol package (public domain)
  leftgroup: "M400000 80\nH435C64 80 168.3 229.4 21 260c-5.9 1.2-18 0-18 0-2 0-3-1-3-3v-38C76 61 257 0\n 435 0h399565z",
  leftgroupunder: "M400000 262\nH435C64 262 168.3 112.6 21 82c-5.9-1.2-18 0-18 0-2 0-3 1-3 3v38c76 158 257 219\n 435 219h399565z",
  // Harpoons are from glyph U+21BD in font KaTeX Main
  leftharpoon: "M0 267c.7 5.3 3 10 7 14h399993v-40H93c3.3\n-3.3 10.2-9.5 20.5-18.5s17.8-15.8 22.5-20.5c50.7-52 88-110.3 112-175 4-11.3 5\n-18.3 3-21-1.3-4-7.3-6-18-6-8 0-13 .7-15 2s-4.7 6.7-8 16c-42 98.7-107.3 174.7\n-196 228-6.7 4.7-10.7 8-12 10-1.3 2-2 5.7-2 11zm100-26v40h399900v-40z",
  leftharpoonplus: "M0 267c.7 5.3 3 10 7 14h399993v-40H93c3.3-3.3 10.2-9.5\n 20.5-18.5s17.8-15.8 22.5-20.5c50.7-52 88-110.3 112-175 4-11.3 5-18.3 3-21-1.3\n-4-7.3-6-18-6-8 0-13 .7-15 2s-4.7 6.7-8 16c-42 98.7-107.3 174.7-196 228-6.7 4.7\n-10.7 8-12 10-1.3 2-2 5.7-2 11zm100-26v40h399900v-40zM0 435v40h400000v-40z\nm0 0v40h400000v-40z",
  leftharpoondown: "M7 241c-4 4-6.333 8.667-7 14 0 5.333.667 9 2 11s5.333\n 5.333 12 10c90.667 54 156 130 196 228 3.333 10.667 6.333 16.333 9 17 2 .667 5\n 1 9 1h5c10.667 0 16.667-2 18-6 2-2.667 1-9.667-3-21-32-87.333-82.667-157.667\n-152-211l-3-3h399907v-40zM93 281 H400000 v-40L7 241z",
  leftharpoondownplus: "M7 435c-4 4-6.3 8.7-7 14 0 5.3.7 9 2 11s5.3 5.3 12\n 10c90.7 54 156 130 196 228 3.3 10.7 6.3 16.3 9 17 2 .7 5 1 9 1h5c10.7 0 16.7\n-2 18-6 2-2.7 1-9.7-3-21-32-87.3-82.7-157.7-152-211l-3-3h399907v-40H7zm93 0\nv40h399900v-40zM0 241v40h399900v-40zm0 0v40h399900v-40z",
  // hook is from glyph U+21A9 in font KaTeX Main
  lefthook: "M400000 281 H103s-33-11.2-61-33.5S0 197.3 0 164s14.2-61.2 42.5\n-83.5C70.8 58.2 104 47 142 47 c16.7 0 25 6.7 25 20 0 12-8.7 18.7-26 20-40 3.3\n-68.7 15.7-86 37-10 12-15 25.3-15 40 0 22.7 9.8 40.7 29.5 54 19.7 13.3 43.5 21\n 71.5 23h399859zM103 281v-40h399897v40z",
  leftlinesegment: "M40 281 V428 H0 V94 H40 V241 H400000 v40z\nM40 281 V428 H0 V94 H40 V241 H400000 v40z",
  leftmapsto: "M40 281 V448H0V74H40V241H400000v40z\nM40 281 V448H0V74H40V241H400000v40z",
  // tofrom is from glyph U+21C4 in font KaTeX AMS Regular
  leftToFrom: "M0 147h400000v40H0zm0 214c68 40 115.7 95.7 143 167h22c15.3 0 23\n-.3 23-1 0-1.3-5.3-13.7-16-37-18-35.3-41.3-69-70-101l-7-8h399905v-40H95l7-8\nc28.7-32 52-65.7 70-101 10.7-23.3 16-35.7 16-37 0-.7-7.7-1-23-1h-22C115.7 265.3\n 68 321 0 361zm0-174v-40h399900v40zm100 154v40h399900v-40z",
  longequal: "M0 50 h400000 v40H0z m0 194h40000v40H0z\nM0 50 h400000 v40H0z m0 194h40000v40H0z",
  midbrace: "M200428 334\nc-100.7-8.3-195.3-44-280-108-55.3-42-101.7-93-139-153l-9-14c-2.7 4-5.7 8.7-9 14\n-53.3 86.7-123.7 153-211 199-66.7 36-137.3 56.3-212 62H0V214h199568c178.3-11.7\n 311.7-78.3 403-201 6-8 9.7-12 11-12 .7-.7 6.7-1 18-1s17.3.3 18 1c1.3 0 5 4 11\n 12 44.7 59.3 101.3 106.3 170 141s145.3 54.3 229 60h199572v120z",
  midbraceunder: "M199572 214\nc100.7 8.3 195.3 44 280 108 55.3 42 101.7 93 139 153l9 14c2.7-4 5.7-8.7 9-14\n 53.3-86.7 123.7-153 211-199 66.7-36 137.3-56.3 212-62h199568v120H200432c-178.3\n 11.7-311.7 78.3-403 201-6 8-9.7 12-11 12-.7.7-6.7 1-18 1s-17.3-.3-18-1c-1.3 0\n-5-4-11-12-44.7-59.3-101.3-106.3-170-141s-145.3-54.3-229-60H0V214z",
  oiintSize1: "M512.6 71.6c272.6 0 320.3 106.8 320.3 178.2 0 70.8-47.7 177.6\n-320.3 177.6S193.1 320.6 193.1 249.8c0-71.4 46.9-178.2 319.5-178.2z\nm368.1 178.2c0-86.4-60.9-215.4-368.1-215.4-306.4 0-367.3 129-367.3 215.4 0 85.8\n60.9 214.8 367.3 214.8 307.2 0 368.1-129 368.1-214.8z",
  oiintSize2: "M757.8 100.1c384.7 0 451.1 137.6 451.1 230 0 91.3-66.4 228.8\n-451.1 228.8-386.3 0-452.7-137.5-452.7-228.8 0-92.4 66.4-230 452.7-230z\nm502.4 230c0-111.2-82.4-277.2-502.4-277.2s-504 166-504 277.2\nc0 110 84 276 504 276s502.4-166 502.4-276z",
  oiiintSize1: "M681.4 71.6c408.9 0 480.5 106.8 480.5 178.2 0 70.8-71.6 177.6\n-480.5 177.6S202.1 320.6 202.1 249.8c0-71.4 70.5-178.2 479.3-178.2z\nm525.8 178.2c0-86.4-86.8-215.4-525.7-215.4-437.9 0-524.7 129-524.7 215.4 0\n85.8 86.8 214.8 524.7 214.8 438.9 0 525.7-129 525.7-214.8z",
  oiiintSize2: "M1021.2 53c603.6 0 707.8 165.8 707.8 277.2 0 110-104.2 275.8\n-707.8 275.8-606 0-710.2-165.8-710.2-275.8C311 218.8 415.2 53 1021.2 53z\nm770.4 277.1c0-131.2-126.4-327.6-770.5-327.6S248.4 198.9 248.4 330.1\nc0 130 128.8 326.4 772.7 326.4s770.5-196.4 770.5-326.4z",
  rightarrow: "M0 241v40h399891c-47.3 35.3-84 78-110 128\n-16.7 32-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20\n 11 8 0 13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7\n 39-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85\n-40.5-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5\n-12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67\n 151.7 139 205zm0 0v40h399900v-40z",
  rightbrace: "M400000 542l\n-6 6h-17c-12.7 0-19.3-.3-20-1-4-4-7.3-8.3-10-13-35.3-51.3-80.8-93.8-136.5-127.5\ns-117.2-55.8-184.5-66.5c-.7 0-2-.3-4-1-18.7-2.7-76-4.3-172-5H0V214h399571l6 1\nc124.7 8 235 61.7 331 161 31.3 33.3 59.7 72.7 85 118l7 13v35z",
  rightbraceunder: "M399994 0l6 6v35l-6 11c-56 104-135.3 181.3-238 232-57.3\n 28.7-117 45-179 50H-300V214h399897c43.3-7 81-15 113-26 100.7-33 179.7-91 237\n-174 2.7-5 6-9 10-13 .7-1 7.3-1 20-1h17z",
  rightgroup: "M0 80h399565c371 0 266.7 149.4 414 180 5.9 1.2 18 0 18 0 2 0\n 3-1 3-3v-38c-76-158-257-219-435-219H0z",
  rightgroupunder: "M0 262h399565c371 0 266.7-149.4 414-180 5.9-1.2 18 0 18\n 0 2 0 3 1 3 3v38c-76 158-257 219-435 219H0z",
  rightharpoon: "M0 241v40h399993c4.7-4.7 7-9.3 7-14 0-9.3\n-3.7-15.3-11-18-92.7-56.7-159-133.7-199-231-3.3-9.3-6-14.7-8-16-2-1.3-7-2-15-2\n-10.7 0-16.7 2-18 6-2 2.7-1 9.7 3 21 15.3 42 36.7 81.8 64 119.5 27.3 37.7 58\n 69.2 92 94.5zm0 0v40h399900v-40z",
  rightharpoonplus: "M0 241v40h399993c4.7-4.7 7-9.3 7-14 0-9.3-3.7-15.3-11\n-18-92.7-56.7-159-133.7-199-231-3.3-9.3-6-14.7-8-16-2-1.3-7-2-15-2-10.7 0-16.7\n 2-18 6-2 2.7-1 9.7 3 21 15.3 42 36.7 81.8 64 119.5 27.3 37.7 58 69.2 92 94.5z\nm0 0v40h399900v-40z m100 194v40h399900v-40zm0 0v40h399900v-40z",
  rightharpoondown: "M399747 511c0 7.3 6.7 11 20 11 8 0 13-.8 15-2.5s4.7-6.8\n 8-15.5c40-94 99.3-166.3 178-217 13.3-8 20.3-12.3 21-13 5.3-3.3 8.5-5.8 9.5\n-7.5 1-1.7 1.5-5.2 1.5-10.5s-2.3-10.3-7-15H0v40h399908c-34 25.3-64.7 57-92 95\n-27.3 38-48.7 77.7-64 119-3.3 8.7-5 14-5 16zM0 241v40h399900v-40z",
  rightharpoondownplus: "M399747 705c0 7.3 6.7 11 20 11 8 0 13-.8\n 15-2.5s4.7-6.8 8-15.5c40-94 99.3-166.3 178-217 13.3-8 20.3-12.3 21-13 5.3-3.3\n 8.5-5.8 9.5-7.5 1-1.7 1.5-5.2 1.5-10.5s-2.3-10.3-7-15H0v40h399908c-34 25.3\n-64.7 57-92 95-27.3 38-48.7 77.7-64 119-3.3 8.7-5 14-5 16zM0 435v40h399900v-40z\nm0-194v40h400000v-40zm0 0v40h400000v-40z",
  righthook: "M399859 241c-764 0 0 0 0 0 40-3.3 68.7-15.7 86-37 10-12 15-25.3\n 15-40 0-22.7-9.8-40.7-29.5-54-19.7-13.3-43.5-21-71.5-23-17.3-1.3-26-8-26-20 0\n-13.3 8.7-20 26-20 38 0 71 11.2 99 33.5 0 0 7 5.6 21 16.7 14 11.2 21 33.5 21\n 66.8s-14 61.2-42 83.5c-28 22.3-61 33.5-99 33.5L0 241z M0 281v-40h399859v40z",
  rightlinesegment: "M399960 241 V94 h40 V428 h-40 V281 H0 v-40z\nM399960 241 V94 h40 V428 h-40 V281 H0 v-40z",
  rightToFrom: "M400000 167c-70.7-42-118-97.7-142-167h-23c-15.3 0-23 .3-23\n 1 0 1.3 5.3 13.7 16 37 18 35.3 41.3 69 70 101l7 8H0v40h399905l-7 8c-28.7 32\n-52 65.7-70 101-10.7 23.3-16 35.7-16 37 0 .7 7.7 1 23 1h23c24-69.3 71.3-125 142\n-167z M100 147v40h399900v-40zM0 341v40h399900v-40z",
  // twoheadleftarrow is from glyph U+219E in font KaTeX AMS Regular
  twoheadleftarrow: "M0 167c68 40\n 115.7 95.7 143 167h22c15.3 0 23-.3 23-1 0-1.3-5.3-13.7-16-37-18-35.3-41.3-69\n-70-101l-7-8h125l9 7c50.7 39.3 85 86 103 140h46c0-4.7-6.3-18.7-19-42-18-35.3\n-40-67.3-66-96l-9-9h399716v-40H284l9-9c26-28.7 48-60.7 66-96 12.7-23.333 19\n-37.333 19-42h-46c-18 54-52.3 100.7-103 140l-9 7H95l7-8c28.7-32 52-65.7 70-101\n 10.7-23.333 16-35.7 16-37 0-.7-7.7-1-23-1h-22C115.7 71.3 68 127 0 167z",
  twoheadrightarrow: "M400000 167\nc-68-40-115.7-95.7-143-167h-22c-15.3 0-23 .3-23 1 0 1.3 5.3 13.7 16 37 18 35.3\n 41.3 69 70 101l7 8h-125l-9-7c-50.7-39.3-85-86-103-140h-46c0 4.7 6.3 18.7 19 42\n 18 35.3 40 67.3 66 96l9 9H0v40h399716l-9 9c-26 28.7-48 60.7-66 96-12.7 23.333\n-19 37.333-19 42h46c18-54 52.3-100.7 103-140l9-7h125l-7 8c-28.7 32-52 65.7-70\n 101-10.7 23.333-16 35.7-16 37 0 .7 7.7 1 23 1h22c27.3-71.3 75-127 143-167z",
  // tilde1 is a modified version of a glyph from the MnSymbol package
  tilde1: "M200 55.538c-77 0-168 73.953-177 73.953-3 0-7\n-2.175-9-5.437L2 97c-1-2-2-4-2-6 0-4 2-7 5-9l20-12C116 12 171 0 207 0c86 0\n 114 68 191 68 78 0 168-68 177-68 4 0 7 2 9 5l12 19c1 2.175 2 4.35 2 6.525 0\n 4.35-2 7.613-5 9.788l-19 13.05c-92 63.077-116.937 75.308-183 76.128\n-68.267.847-113-73.952-191-73.952z",
  // ditto tilde2, tilde3, & tilde4
  tilde2: "M344 55.266c-142 0-300.638 81.316-311.5 86.418\n-8.01 3.762-22.5 10.91-23.5 5.562L1 120c-1-2-1-3-1-4 0-5 3-9 8-10l18.4-9C160.9\n 31.9 283 0 358 0c148 0 188 122 331 122s314-97 326-97c4 0 8 2 10 7l7 21.114\nc1 2.14 1 3.21 1 4.28 0 5.347-3 9.626-7 10.696l-22.3 12.622C852.6 158.372 751\n 181.476 676 181.476c-149 0-189-126.21-332-126.21z",
  tilde3: "M786 59C457 59 32 175.242 13 175.242c-6 0-10-3.457\n-11-10.37L.15 138c-1-7 3-12 10-13l19.2-6.4C378.4 40.7 634.3 0 804.3 0c337 0\n 411.8 157 746.8 157 328 0 754-112 773-112 5 0 10 3 11 9l1 14.075c1 8.066-.697\n 16.595-6.697 17.492l-21.052 7.31c-367.9 98.146-609.15 122.696-778.15 122.696\n -338 0-409-156.573-744-156.573z",
  tilde4: "M786 58C457 58 32 177.487 13 177.487c-6 0-10-3.345\n-11-10.035L.15 143c-1-7 3-12 10-13l22-6.7C381.2 35 637.15 0 807.15 0c337 0 409\n 177 744 177 328 0 754-127 773-127 5 0 10 3 11 9l1 14.794c1 7.805-3 13.38-9\n 14.495l-20.7 5.574c-366.85 99.79-607.3 139.372-776.3 139.372-338 0-409\n -175.236-744-175.236z",
  // vec is from glyph U+20D7 in font KaTeX Main
  vec: "M377 20c0-5.333 1.833-10 5.5-14S391 0 397 0c4.667 0 8.667 1.667 12 5\n3.333 2.667 6.667 9 10 19 6.667 24.667 20.333 43.667 41 57 7.333 4.667 11\n10.667 11 18 0 6-1 10-3 12s-6.667 5-14 9c-28.667 14.667-53.667 35.667-75 63\n-1.333 1.333-3.167 3.5-5.5 6.5s-4 4.833-5 5.5c-1 .667-2.5 1.333-4.5 2s-4.333 1\n-7 1c-4.667 0-9.167-1.833-13.5-5.5S337 184 337 178c0-12.667 15.667-32.333 47-59\nH213l-171-1c-8.667-6-13-12.333-13-19 0-4.667 4.333-11.333 13-20h359\nc-16-25.333-24-45-24-59z",
  // widehat1 is a modified version of a glyph from the MnSymbol package
  widehat1: "M529 0h5l519 115c5 1 9 5 9 10 0 1-1 2-1 3l-4 22\nc-1 5-5 9-11 9h-2L532 67 19 159h-2c-5 0-9-4-11-9l-5-22c-1-6 2-12 8-13z",
  // ditto widehat2, widehat3, & widehat4
  widehat2: "M1181 0h2l1171 176c6 0 10 5 10 11l-2 23c-1 6-5 10\n-11 10h-1L1182 67 15 220h-1c-6 0-10-4-11-10l-2-23c-1-6 4-11 10-11z",
  widehat3: "M1181 0h2l1171 236c6 0 10 5 10 11l-2 23c-1 6-5 10\n-11 10h-1L1182 67 15 280h-1c-6 0-10-4-11-10l-2-23c-1-6 4-11 10-11z",
  widehat4: "M1181 0h2l1171 296c6 0 10 5 10 11l-2 23c-1 6-5 10\n-11 10h-1L1182 67 15 340h-1c-6 0-10-4-11-10l-2-23c-1-6 4-11 10-11z",
  // widecheck paths are all inverted versions of widehat
  widecheck1: "M529,159h5l519,-115c5,-1,9,-5,9,-10c0,-1,-1,-2,-1,-3l-4,-22c-1,\n-5,-5,-9,-11,-9h-2l-512,92l-513,-92h-2c-5,0,-9,4,-11,9l-5,22c-1,6,2,12,8,13z",
  widecheck2: "M1181,220h2l1171,-176c6,0,10,-5,10,-11l-2,-23c-1,-6,-5,-10,\n-11,-10h-1l-1168,153l-1167,-153h-1c-6,0,-10,4,-11,10l-2,23c-1,6,4,11,10,11z",
  widecheck3: "M1181,280h2l1171,-236c6,0,10,-5,10,-11l-2,-23c-1,-6,-5,-10,\n-11,-10h-1l-1168,213l-1167,-213h-1c-6,0,-10,4,-11,10l-2,23c-1,6,4,11,10,11z",
  widecheck4: "M1181,340h2l1171,-296c6,0,10,-5,10,-11l-2,-23c-1,-6,-5,-10,\n-11,-10h-1l-1168,273l-1167,-273h-1c-6,0,-10,4,-11,10l-2,23c-1,6,4,11,10,11z",
  // The next ten paths support reaction arrows from the mhchem package.
  // Arrows for \ce{<-->} are offset from xAxis by 0.22ex, per mhchem in LaTeX
  // baraboveleftarrow is mostly from from glyph U+2190 in font KaTeX Main
  baraboveleftarrow: "M400000 620h-399890l3 -3c68.7 -52.7 113.7 -120 135 -202\nc4 -14.7 6 -23 6 -25c0 -7.3 -7 -11 -21 -11c-8 0 -13.2 0.8 -15.5 2.5\nc-2.3 1.7 -4.2 5.8 -5.5 12.5c-1.3 4.7 -2.7 10.3 -4 17c-12 48.7 -34.8 92 -68.5 130\ns-74.2 66.3 -121.5 85c-10 4 -16 7.7 -18 11c0 8.7 6 14.3 18 17c47.3 18.7 87.8 47\n121.5 85s56.5 81.3 68.5 130c0.7 2 1.3 5 2 9s1.2 6.7 1.5 8c0.3 1.3 1 3.3 2 6\ns2.2 4.5 3.5 5.5c1.3 1 3.3 1.8 6 2.5s6 1 10 1c14 0 21 -3.7 21 -11\nc0 -2 -2 -10.3 -6 -25c-20 -79.3 -65 -146.7 -135 -202l-3 -3h399890z\nM100 620v40h399900v-40z M0 241v40h399900v-40zM0 241v40h399900v-40z",
  // rightarrowabovebar is mostly from glyph U+2192, KaTeX Main
  rightarrowabovebar: "M0 241v40h399891c-47.3 35.3-84 78-110 128-16.7 32\n-27.7 63.7-33 95 0 1.3-.2 2.7-.5 4-.3 1.3-.5 2.3-.5 3 0 7.3 6.7 11 20 11 8 0\n13.2-.8 15.5-2.5 2.3-1.7 4.2-5.5 5.5-11.5 2-13.3 5.7-27 11-41 14.7-44.7 39\n-84.5 73-119.5s73.7-60.2 119-75.5c6-2 9-5.7 9-11s-3-9-9-11c-45.3-15.3-85-40.5\n-119-75.5s-58.3-74.8-73-119.5c-4.7-14-8.3-27.3-11-40-1.3-6.7-3.2-10.8-5.5\n-12.5-2.3-1.7-7.5-2.5-15.5-2.5-14 0-21 3.7-21 11 0 2 2 10.3 6 25 20.7 83.3 67\n151.7 139 205zm96 379h399894v40H0zm0 0h399904v40H0z",
  // The short left harpoon has 0.5em (i.e. 500 units) kern on the left end.
  // Ref from mhchem.sty: \rlap{\raisebox{-.22ex}{$\kern0.5em
  baraboveshortleftharpoon: "M507,435c-4,4,-6.3,8.7,-7,14c0,5.3,0.7,9,2,11\nc1.3,2,5.3,5.3,12,10c90.7,54,156,130,196,228c3.3,10.7,6.3,16.3,9,17\nc2,0.7,5,1,9,1c0,0,5,0,5,0c10.7,0,16.7,-2,18,-6c2,-2.7,1,-9.7,-3,-21\nc-32,-87.3,-82.7,-157.7,-152,-211c0,0,-3,-3,-3,-3l399351,0l0,-40\nc-398570,0,-399437,0,-399437,0z M593 435 v40 H399500 v-40z\nM0 281 v-40 H399908 v40z M0 281 v-40 H399908 v40z",
  rightharpoonaboveshortbar: "M0,241 l0,40c399126,0,399993,0,399993,0\nc4.7,-4.7,7,-9.3,7,-14c0,-9.3,-3.7,-15.3,-11,-18c-92.7,-56.7,-159,-133.7,-199,\n-231c-3.3,-9.3,-6,-14.7,-8,-16c-2,-1.3,-7,-2,-15,-2c-10.7,0,-16.7,2,-18,6\nc-2,2.7,-1,9.7,3,21c15.3,42,36.7,81.8,64,119.5c27.3,37.7,58,69.2,92,94.5z\nM0 241 v40 H399908 v-40z M0 475 v-40 H399500 v40z M0 475 v-40 H399500 v40z",
  shortbaraboveleftharpoon: "M7,435c-4,4,-6.3,8.7,-7,14c0,5.3,0.7,9,2,11\nc1.3,2,5.3,5.3,12,10c90.7,54,156,130,196,228c3.3,10.7,6.3,16.3,9,17c2,0.7,5,1,9,\n1c0,0,5,0,5,0c10.7,0,16.7,-2,18,-6c2,-2.7,1,-9.7,-3,-21c-32,-87.3,-82.7,-157.7,\n-152,-211c0,0,-3,-3,-3,-3l399907,0l0,-40c-399126,0,-399993,0,-399993,0z\nM93 435 v40 H400000 v-40z M500 241 v40 H400000 v-40z M500 241 v40 H400000 v-40z",
  shortrightharpoonabovebar: "M53,241l0,40c398570,0,399437,0,399437,0\nc4.7,-4.7,7,-9.3,7,-14c0,-9.3,-3.7,-15.3,-11,-18c-92.7,-56.7,-159,-133.7,-199,\n-231c-3.3,-9.3,-6,-14.7,-8,-16c-2,-1.3,-7,-2,-15,-2c-10.7,0,-16.7,2,-18,6\nc-2,2.7,-1,9.7,3,21c15.3,42,36.7,81.8,64,119.5c27.3,37.7,58,69.2,92,94.5z\nM500 241 v40 H399408 v-40z M500 435 v40 H400000 v-40z"
};


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  // Never used; needed for satisfying interface.
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    "57682": [0, 0.12, 0, 0, 0.45],
    "57683": [0, 0.12, 0, 0, 0.45]
  },
  "Typewriter-Regular": {
    "32": [0, 0, 0, 0, 0.525],
    "33": [0, 0.61111, 0, 0, 0.525],
    "34": [0, 0.61111, 0, 0, 0.525],
    "35": [0, 0.61111, 0, 0, 0.525],
    "36": [0.08333, 0.69444, 0, 0, 0.525],
    "37": [0.08333, 0.69444, 0, 0, 0.525],
    "38": [0, 0.61111, 0, 0, 0.525],
    "39": [0, 0.61111, 0, 0, 0.525],
    "40": [0.08333, 0.69444, 0, 0, 0.525],
    "41": [0.08333, 0.69444, 0, 0, 0.525],
    "42": [0, 0.52083, 0, 0, 0.525],
    "43": [-0.08056, 0.53055, 0, 0, 0.525],
    "44": [0.13889, 0.125, 0, 0, 0.525],
    "45": [-0.08056, 0.53055, 0, 0, 0.525],
    "46": [0, 0.125, 0, 0, 0.525],
    "47": [0.08333, 0.69444, 0, 0, 0.525],
    "48": [0, 0.61111, 0, 0, 0.525],
    "49": [0, 0.61111, 0, 0, 0.525],
    "50": [0, 0.61111, 0, 0, 0.525],
    "51": [0, 0.61111, 0, 0, 0.525],
    "52": [0, 0.61111, 0, 0, 0.525],
    "53": [0, 0.61111, 0, 0, 0.525],
    "54": [0, 0.61111, 0, 0, 0.525],
    "55": [0, 0.61111, 0, 0, 0.525],
    "56": [0, 0.61111, 0, 0, 0.525],
    "57": [0, 0.61111, 0, 0, 0.525],
    "58": [0, 0.43056, 0, 0, 0.525],
    "59": [0.13889, 0.43056, 0, 0, 0.525],
    "60": [-0.05556, 0.55556, 0, 0, 0.525],
    "61": [-0.19549, 0.41562, 0, 0, 0.525],
    "62": [-0.05556, 0.55556, 0, 0, 0.525],
    "63": [0, 0.61111, 0, 0, 0.525],
    "64": [0, 0.61111, 0, 0, 0.525],
    "65": [0, 0.61111, 0, 0, 0.525],
    "66": [0, 0.61111, 0, 0, 0.525],
    "67": [0, 0.61111, 0, 0, 0.525],
    "68": [0, 0.61111, 0, 0, 0.525],
    "69": [0, 0.61111, 0, 0, 0.525],
    "70": [0, 0.61111, 0, 0, 0.525],
    "71": [0, 0.61111, 0, 0, 0.525],
    "72": [0, 0.61111, 0, 0, 0.525],
    "73": [0, 0.61111, 0, 0, 0.525],
    "74": [0, 0.61111, 0, 0, 0.525],
    "75": [0, 0.61111, 0, 0, 0.525],
    "76": [0, 0.61111, 0, 0, 0.525],
    "77": [0, 0.61111, 0, 0, 0.525],
    "78": [0, 0.61111, 0, 0, 0.525],
    "79": [0, 0.61111, 0, 0, 0.525],
    "80": [0, 0.61111, 0, 0, 0.525],
    "81": [0.13889, 0.61111, 0, 0, 0.525],
    "82": [0, 0.61111, 0, 0, 0.525],
    "83": [0, 0.61111, 0, 0, 0.525],
    "84": [0, 0.61111, 0, 0, 0.525],
    "85": [0, 0.61111, 0, 0, 0.525],
    "86": [0, 0.61111, 0, 0, 0.525],
    "87": [0, 0.61111, 0, 0, 0.525],
    "88": [0, 0.61111, 0, 0, 0.525],
    "89": [0, 0.61111, 0, 0, 0.525],
    "90": [0, 0.61111, 0, 0, 0.525],
    "91": [0.08333, 0.69444, 0, 0, 0.525],
    "92": [0.08333, 0.69444, 0, 0, 0.525],
    "93": [0.08333, 0.69444, 0, 0, 0.525],
    "94": [0, 0.61111, 0, 0, 0.525],
    "95": [0.09514, 0, 0, 0, 0.525],
    "96": [0, 0.61111, 0, 0, 0.525],
    "97": [0, 0.43056, 0, 0, 0.525],
    "98": [0, 0.61111, 0, 0, 0.525],
    "99": [0, 0.43056, 0, 0, 0.525],
    "100": [0, 0.61111, 0, 0, 0.525],
    "101": [0, 0.43056, 0, 0, 0.525],
    "102": [0, 0.61111, 0, 0, 0.525],
    "103": [0.22222, 0.43056, 0, 0, 0.525],
    "104": [0, 0.61111, 0, 0, 0.525],
    "105": [0, 0.61111, 0, 0, 0.525],
    "106": [0.22222, 0.61111, 0, 0, 0.525],
    "107": [0, 0.61111, 0, 0, 0.525],
    "108": [0, 0.61111, 0, 0, 0.525],
    "109": [0, 0.43056, 0, 0, 0.525],
    "110": [0, 0.43056, 0, 0, 0.525],
    "111": [0, 0.43056, 0, 0, 0.525],
    "112": [0.22222, 0.43056, 0, 0, 0.525],
    "113": [0.22222, 0.43056, 0, 0, 0.525],
    "114": [0, 0.43056, 0, 0, 0.525],
    "115": [0, 0.43056, 0, 0, 0.525],
    "116": [0, 0.55358, 0, 0, 0.525],
    "117": [0, 0.43056, 0, 0, 0.525],
    "118": [0, 0.43056, 0, 0, 0.525],
    "119": [0, 0.43056, 0, 0, 0.525],
    "120": [0, 0.43056, 0, 0, 0.525],
    "121": [0.22222, 0.43056, 0, 0, 0.525],
    "122": [0, 0.43056, 0, 0, 0.525],
    "123": [0.08333, 0.69444, 0, 0, 0.525],
    "124": [0.08333, 0.69444, 0, 0, 0.525],
    "125": [0.08333, 0.69444, 0, 0, 0.525],
    "126": [0, 0.61111, 0, 0, 0.525],
    "127": [0, 0.61111, 0, 0, 0.525],
    "160": [0, 0, 0, 0, 0.525],
    "176": [0, 0.61111, 0, 0, 0.525],
    "184": [0.19445, 0, 0, 0, 0.525],
    "305": [0, 0.43056, 0, 0, 0.525],
    "567": [0.22222, 0.43056, 0, 0, 0.525],
    "711": [0, 0.56597, 0, 0, 0.525],
    "713": [0, 0.56555, 0, 0, 0.525],
    "714": [0, 0.61111, 0, 0, 0.525],
    "715": [0, 0.61111, 0, 0, 0.525],
    "728": [0, 0.61111, 0, 0, 0.525],
    "730": [0, 0.61111, 0, 0, 0.525],
    "770": [0, 0.61111, 0, 0, 0.525],
    "771": [0, 0.61111, 0, 0, 0.525],
    "776": [0, 0.61111, 0, 0, 0.525],
    "915": [0, 0.61111, 0, 0, 0.525],
    "916": [0, 0.61111, 0, 0, 0.525],
    "920": [0, 0.61111, 0, 0, 0.525],
    "923": [0, 0.61111, 0, 0, 0.525],
    "926": [0, 0.61111, 0, 0, 0.525],
    "928": [0, 0.61111, 0, 0, 0.525],
    "931": [0, 0.61111, 0, 0, 0.525],
    "933": [0, 0.61111, 0, 0, 0.525],
    "934": [0, 0.61111, 0, 0, 0.525],
    "936": [0, 0.61111, 0, 0, 0.525],
    "937": [0, 0.61111, 0, 0, 0.525],
    "8216": [0, 0.61111, 0, 0, 0.525],
    "8217": [0, 0.61111, 0, 0, 0.525],
    "8242": [0, 0.61111, 0, 0, 0.525],
    "9251": [0.11111, 0.21944, 0, 0, 0.525]
  }
});


/**
 * This file contains metrics regarding fonts and individual symbols. The sigma
 * and xi variables, as well as the metricMap map contain data extracted from
 * TeX, TeX font metrics, and the TTF files. These data are then exposed via the
 * `metrics` variable and the getCharacterMetrics function.
 */
// In TeX, there are actually three sets of dimensions, one for each of
// textstyle (size index 5 and higher: >=9pt), scriptstyle (size index 3 and 4:
// 7-8pt), and scriptscriptstyle (size index 1 and 2: 5-6pt).  These are
// provided in the the arrays below, in that order.
//
// The font metrics are stored in fonts cmsy10, cmsy7, and cmsy5 respsectively.
// This was determined by running the following script:
//
//     latex -interaction=nonstopmode \
//     '\documentclass{article}\usepackage{amsmath}\begin{document}' \
//     '$a$ \expandafter\show\the\textfont2' \
//     '\expandafter\show\the\scriptfont2' \
//     '\expandafter\show\the\scriptscriptfont2' \
//     '\stop'
//
// The metrics themselves were retreived using the following commands:
//
//     tftopl cmsy10
//     tftopl cmsy7
//     tftopl cmsy5
//
// The output of each of these commands is quite lengthy.  The only part we
// care about is the FONTDIMEN section. Each value is measured in EMs.
var sigmasAndXis = {
  slant: [0.250, 0.250, 0.250],
  // sigma1
  space: [0.000, 0.000, 0.000],
  // sigma2
  stretch: [0.000, 0.000, 0.000],
  // sigma3
  shrink: [0.000, 0.000, 0.000],
  // sigma4
  xHeight: [0.431, 0.431, 0.431],
  // sigma5
  quad: [1.000, 1.171, 1.472],
  // sigma6
  extraSpace: [0.000, 0.000, 0.000],
  // sigma7
  num1: [0.677, 0.732, 0.925],
  // sigma8
  num2: [0.394, 0.384, 0.387],
  // sigma9
  num3: [0.444, 0.471, 0.504],
  // sigma10
  denom1: [0.686, 0.752, 1.025],
  // sigma11
  denom2: [0.345, 0.344, 0.532],
  // sigma12
  sup1: [0.413, 0.503, 0.504],
  // sigma13
  sup2: [0.363, 0.431, 0.404],
  // sigma14
  sup3: [0.289, 0.286, 0.294],
  // sigma15
  sub1: [0.150, 0.143, 0.200],
  // sigma16
  sub2: [0.247, 0.286, 0.400],
  // sigma17
  supDrop: [0.386, 0.353, 0.494],
  // sigma18
  subDrop: [0.050, 0.071, 0.100],
  // sigma19
  delim1: [2.390, 1.700, 1.980],
  // sigma20
  delim2: [1.010, 1.157, 1.420],
  // sigma21
  axisHeight: [0.250, 0.250, 0.250],
  // sigma22
  // These font metrics are extracted from TeX by using tftopl on cmex10.tfm;
  // they correspond to the font parameters of the extension fonts (family 3).
  // See the TeXbook, page 441. In AMSTeX, the extension fonts scale; to
  // match cmex7, we'd use cmex7.tfm values for script and scriptscript
  // values.
  defaultRuleThickness: [0.04, 0.049, 0.049],
  // xi8; cmex7: 0.049
  bigOpSpacing1: [0.111, 0.111, 0.111],
  // xi9
  bigOpSpacing2: [0.166, 0.166, 0.166],
  // xi10
  bigOpSpacing3: [0.2, 0.2, 0.2],
  // xi11
  bigOpSpacing4: [0.6, 0.611, 0.611],
  // xi12; cmex7: 0.611
  bigOpSpacing5: [0.1, 0.143, 0.143],
  // xi13; cmex7: 0.143
  // The \sqrt rule width is taken from the height of the surd character.
  // Since we use the same font at all sizes, this thickness doesn't scale.
  sqrtRuleThickness: [0.04, 0.04, 0.04],
  // This value determines how large a pt is, for metrics which are defined
  // in terms of pts.
  // This value is also used in katex.less; if you change it make sure the
  // values match.
  ptPerEm: [10.0, 10.0, 10.0],
  // The space between adjacent `|` columns in an array definition. From
  // `\showthe\doublerulesep` in LaTeX. Equals 2.0 / ptPerEm.
  doubleRuleSep: [0.2, 0.2, 0.2],
  // The width of separator lines in {array} environments. From
  // `\showthe\arrayrulewidth` in LaTeX. Equals 0.4 / ptPerEm.
  arrayRuleWidth: [0.04, 0.04, 0.04],
  // Two values from LaTeX source2e:
  fboxsep: [0.3, 0.3, 0.3],
  //        3 pt / ptPerEm
  fboxrule: [0.04, 0.04, 0.04] // 0.4 pt / ptPerEm

}; // This map contains a mapping from font name and character code to character
// metrics, including height, depth, italic correction, and skew (kern from the
// character to the corresponding \skewchar)
// This map is generated via `make metrics`. It should not be changed manually.

 // These are very rough approximations.  We default to Times New Roman which
// should have Latin-1 and Cyrillic characters, but may not depending on the
// operating system.  The metrics do not account for extra height from the
// accents.  In the case of Cyrillic characters which have both ascenders and
// descenders we prefer approximations with ascenders, primarily to prevent
// the fraction bar or root line from intersecting the glyph.
// TODO(kevinb) allow union of multiple glyph metrics for better accuracy.

var extraCharacterMap = {
  // Latin-1
  'Å': 'A',
  'Ð': 'D',
  'Þ': 'o',
  'å': 'a',
  'ð': 'd',
  'þ': 'o',
  // Cyrillic
  'А': 'A',
  'Б': 'B',
  'В': 'B',
  'Г': 'F',
  'Д': 'A',
  'Е': 'E',
  'Ж': 'K',
  'З': '3',
  'И': 'N',
  'Й': 'N',
  'К': 'K',
  'Л': 'N',
  'М': 'M',
  'Н': 'H',
  'О': 'O',
  'П': 'N',
  'Р': 'P',
  'С': 'C',
  'Т': 'T',
  'У': 'y',
  'Ф': 'O',
  'Х': 'X',
  'Ц': 'U',
  'Ч': 'h',
  'Ш': 'W',
  'Щ': 'W',
  'Ъ': 'B',
  'Ы': 'X',
  'Ь': 'B',
  'Э': '3',
  'Ю': 'X',
  'Я': 'R',
  'а': 'a',
  'б': 'b',
  'в': 'a',
  'г': 'r',
  'д': 'y',
  'е': 'e',
  'ж': 'm',
  'з': 'e',
  'и': 'n',
  'й': 'n',
  'к': 'n',
  'л': 'n',
  'м': 'm',
  'н': 'n',
  'о': 'o',
  'п': 'n',
  'р': 'p',
  'с': 'c',
  'т': 'o',
  'у': 'y',
  'ф': 'b',
  'х': 'x',
  'ц': 'n',
  'ч': 'n',
  'ш': 'w',
  'щ': 'w',
  'ъ': 'a',
  'ы': 'm',
  'ь': 'a',
  'э': 'e',
  'ю': 'm',
  'я': 'r'
};

/**
 * This function adds new font metrics to default metricMap
 * It can also override existing metrics
 */
function setFontMetrics(fontName, metrics) {
  fontMetricsData[fontName] = metrics;
}
/**
 * This function is a convenience function for looking up information in the
 * metricMap table. It takes a character as a string, and a font.
 *
 * Note: the `width` property may be undefined if fontMetricsData.js wasn't
 * built using `Make extended_metrics`.
 */

function getCharacterMetrics(character, font, mode) {
  if (!fontMetricsData[font]) {
    throw new Error("Font metrics not found for font: " + font + ".");
  }

  var ch = character.charCodeAt(0);
  var metrics = fontMetricsData[font][ch];

  if (!metrics && character[0] in extraCharacterMap) {
    ch = extraCharacterMap[character[0]].charCodeAt(0);
    metrics = fontMetricsData[font][ch];
  }

  if (!metrics && mode === 'text') {
    // We don't typically have font metrics for Asian scripts.
    // But since we support them in text mode, we need to return
    // some sort of metrics.
    // So if the character is in a script we support but we
    // don't have metrics for it, just use the metrics for
    // the Latin capital letter M. This is close enough because
    // we (currently) only care about the height of the glpyh
    // not its width.
    if (supportedCodepoint(ch)) {
      metrics = fontMetricsData[font][77]; // 77 is the charcode for 'M'
    }
  }

  if (metrics) {
    return {
      depth: metrics[0],
      height: metrics[1],
      italic: metrics[2],
      skew: metrics[3],
      width: metrics[4]
    };
  }
}
var fontMetricsBySizeIndex = {};
/**
 * Get the font metrics for a given size.
 */

function getGlobalMetrics(size) {
  var sizeIndex;

  if (size >= 5) {
    sizeIndex = 0;
  } else if (size >= 3) {
    sizeIndex = 1;
  } else {
    sizeIndex = 2;
  }

  if (!fontMetricsBySizeIndex[sizeIndex]) {
    var metrics = fontMetricsBySizeIndex[sizeIndex] = {
      cssEmPerMu: sigmasAndXis.quad[sizeIndex] / 18
    };

    for (var key in sigmasAndXis) {
      if (sigmasAndXis.hasOwnProperty(key)) {
        metrics[key] = sigmasAndXis[key][sizeIndex];
      }
    }
  }

  return fontMetricsBySizeIndex[sizeIndex];
}
/**
 * This file contains information about the options that the Parser carries
 * around with it while parsing. Data is held in an `Options` object, and when
 * recursing, a new `Options` object can be created with the `.with*` and
 * `.reset` functions.
 */

var sizeStyleMap = [// Each element contains [textsize, scriptsize, scriptscriptsize].
// The size mappings are taken from TeX with \normalsize=10pt.
[1, 1, 1], // size1: [5, 5, 5]              \tiny
[2, 1, 1], // size2: [6, 5, 5]
[3, 1, 1], // size3: [7, 5, 5]              \scriptsize
[4, 2, 1], // size4: [8, 6, 5]              \footnotesize
[5, 2, 1], // size5: [9, 6, 5]              \small
[6, 3, 1], // size6: [10, 7, 5]             \normalsize
[7, 4, 2], // size7: [12, 8, 6]             \large
[8, 6, 3], // size8: [14.4, 10, 7]          \Large
[9, 7, 6], // size9: [17.28, 12, 10]        \LARGE
[10, 8, 7], // size10: [20.74, 14.4, 12]     \huge
[11, 10, 9] // size11: [24.88, 20.74, 17.28] \HUGE
];
var sizeMultipliers = [// fontMetrics.js:getGlobalMetrics also uses size indexes, so if
// you change size indexes, change that function.
0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.2, 1.44, 1.728, 2.074, 2.488];

var sizeAtStyle = function sizeAtStyle(size, style) {
  return style.size < 2 ? size : sizeStyleMap[size - 1][style.size - 1];
}; // In these types, "" (empty string) means "no change".


/**
 * This is the main options class. It contains the current style, size, color,
 * and font.
 *
 * Options objects should not be modified. To create a new Options with
 * different properties, call a `.having*` method.
 */
var Options = /*#__PURE__*/function () {
  // A font family applies to a group of fonts (i.e. SansSerif), while a font
  // represents a specific font (i.e. SansSerif Bold).
  // See: https://tex.stackexchange.com/questions/22350/difference-between-textrm-and-mathrm

  /**
   * The base size index.
   */
  function Options(data) {
    this.style = void 0;
    this.color = void 0;
    this.size = void 0;
    this.textSize = void 0;
    this.phantom = void 0;
    this.font = void 0;
    this.fontFamily = void 0;
    this.fontWeight = void 0;
    this.fontShape = void 0;
    this.sizeMultiplier = void 0;
    this.maxSize = void 0;
    this.minRuleThickness = void 0;
    this._fontMetrics = void 0;
    this.style = data.style;
    this.color = data.color;
    this.size = data.size || Options.BASESIZE;
    this.textSize = data.textSize || this.size;
    this.phantom = !!data.phantom;
    this.font = data.font || "";
    this.fontFamily = data.fontFamily || "";
    this.fontWeight = data.fontWeight || '';
    this.fontShape = data.fontShape || '';
    this.sizeMultiplier = sizeMultipliers[this.size - 1];
    this.maxSize = data.maxSize;
    this.minRuleThickness = data.minRuleThickness;
    this._fontMetrics = undefined;
  }
  /**
   * Returns a new options object with the same properties as "this".  Properties
   * from "extension" will be copied to the new options object.
   */


  var _proto = Options.prototype;

  _proto.extend = function extend(extension) {
    var data = {
      style: this.style,
      size: this.size,
      textSize: this.textSize,
      color: this.color,
      phantom: this.phantom,
      font: this.font,
      fontFamily: this.fontFamily,
      fontWeight: this.fontWeight,
      fontShape: this.fontShape,
      maxSize: this.maxSize,
      minRuleThickness: this.minRuleThickness
    };

    for (var key in extension) {
      if (extension.hasOwnProperty(key)) {
        data[key] = extension[key];
      }
    }

    return new Options(data);
  }
  /**
   * Return an options object with the given style. If `this.style === style`,
   * returns `this`.
   */
  ;

  _proto.havingStyle = function havingStyle(style) {
    if (this.style === style) {
      return this;
    } else {
      return this.extend({
        style: style,
        size: sizeAtStyle(this.textSize, style)
      });
    }
  }
  /**
   * Return an options object with a cramped version of the current style. If
   * the current style is cramped, returns `this`.
   */
  ;

  _proto.havingCrampedStyle = function havingCrampedStyle() {
    return this.havingStyle(this.style.cramp());
  }
  /**
   * Return an options object with the given size and in at least `\textstyle`.
   * Returns `this` if appropriate.
   */
  ;

  _proto.havingSize = function havingSize(size) {
    if (this.size === size && this.textSize === size) {
      return this;
    } else {
      return this.extend({
        style: this.style.text(),
        size: size,
        textSize: size,
        sizeMultiplier: sizeMultipliers[size - 1]
      });
    }
  }
  /**
   * Like `this.havingSize(BASESIZE).havingStyle(style)`. If `style` is omitted,
   * changes to at least `\textstyle`.
   */
  ;

  _proto.havingBaseStyle = function havingBaseStyle(style) {
    style = style || this.style.text();
    var wantSize = sizeAtStyle(Options.BASESIZE, style);

    if (this.size === wantSize && this.textSize === Options.BASESIZE && this.style === style) {
      return this;
    } else {
      return this.extend({
        style: style,
        size: wantSize
      });
    }
  }
  /**
   * Remove the effect of sizing changes such as \Huge.
   * Keep the effect of the current style, such as \scriptstyle.
   */
  ;

  _proto.havingBaseSizing = function havingBaseSizing() {
    var size;

    switch (this.style.id) {
      case 4:
      case 5:
        size = 3; // normalsize in scriptstyle

        break;

      case 6:
      case 7:
        size = 1; // normalsize in scriptscriptstyle

        break;

      default:
        size = 6;
      // normalsize in textstyle or displaystyle
    }

    return this.extend({
      style: this.style.text(),
      size: size
    });
  }
  /**
   * Create a new options object with the given color.
   */
  ;

  _proto.withColor = function withColor(color) {
    return this.extend({
      color: color
    });
  }
  /**
   * Create a new options object with "phantom" set to true.
   */
  ;

  _proto.withPhantom = function withPhantom() {
    return this.extend({
      phantom: true
    });
  }
  /**
   * Creates a new options object with the given math font or old text font.
   * @type {[type]}
   */
  ;

  _proto.withFont = function withFont(font) {
    return this.extend({
      font: font
    });
  }
  /**
   * Create a new options objects with the given fontFamily.
   */
  ;

  _proto.withTextFontFamily = function withTextFontFamily(fontFamily) {
    return this.extend({
      fontFamily: fontFamily,
      font: ""
    });
  }
  /**
   * Creates a new options object with the given font weight
   */
  ;

  _proto.withTextFontWeight = function withTextFontWeight(fontWeight) {
    return this.extend({
      fontWeight: fontWeight,
      font: ""
    });
  }
  /**
   * Creates a new options object with the given font weight
   */
  ;

  _proto.withTextFontShape = function withTextFontShape(fontShape) {
    return this.extend({
      fontShape: fontShape,
      font: ""
    });
  }
  /**
   * Return the CSS sizing classes required to switch from enclosing options
   * `oldOptions` to `this`. Returns an array of classes.
   */
  ;

  _proto.sizingClasses = function sizingClasses(oldOptions) {
    if (oldOptions.size !== this.size) {
      return ["sizing", "reset-size" + oldOptions.size, "size" + this.size];
    } else {
      return [];
    }
  }
  /**
   * Return the CSS sizing classes required to switch to the base size. Like
   * `this.havingSize(BASESIZE).sizingClasses(this)`.
   */
  ;

  _proto.baseSizingClasses = function baseSizingClasses() {
    if (this.size !== Options.BASESIZE) {
      return ["sizing", "reset-size" + this.size, "size" + Options.BASESIZE];
    } else {
      return [];
    }
  }
  /**
   * Return the font metrics for this size.
   */
  ;

  _proto.fontMetrics = function fontMetrics() {
    if (!this._fontMetrics) {
      this._fontMetrics = getGlobalMetrics(this.size);
    }

    return this._fontMetrics;
  }
  /**
   * Gets the CSS color of the current options object
   */
  ;

  _proto.getColor = function getColor() {
    if (this.phantom) {
      return "transparent";
    } else {
      return this.color;
    }
  };

  return Options;
}();

Options.BASESIZE = 6;
/* harmony default export */ var src_Options = (Options);
/**
 * This file does conversion between units.  In particular, it provides
 * calculateSize to convert other units into ems.
 */

 // This table gives the number of TeX pts in one of each *absolute* TeX unit.
// Thus, multiplying a length by this number converts the length from units
// into pts.  Dividing the result by ptPerEm gives the number of ems
// *assuming* a font size of ptPerEm (normal size, normal style).

var ptPerUnit = {
  // https://en.wikibooks.org/wiki/LaTeX/Lengths and
  // https://tex.stackexchange.com/a/8263
  "pt": 1,
  // TeX point
  "mm": 7227 / 2540,
  // millimeter
  "cm": 7227 / 254,
  // centimeter
  "in": 72.27,
  // inch
  "bp": 803 / 800,
  // big (PostScript) points
  "pc": 12,
  // pica
  "dd": 1238 / 1157,
  // didot
  "cc": 14856 / 1157,
  // cicero (12 didot)
  "nd": 685 / 642,
  // new didot
  "nc": 1370 / 107,
  // new cicero (12 new didot)
  "sp": 1 / 65536,
  // scaled point (TeX's internal smallest unit)
  // https://tex.stackexchange.com/a/41371
  "px": 803 / 800 // \pdfpxdimen defaults to 1 bp in pdfTeX and LuaTeX

}; // Dictionary of relative units, for fast validity testing.

var relativeUnit = {
  "ex": true,
  "em": true,
  "mu": true
};

/**
 * Determine whether the specified unit (either a string defining the unit
 * or a "size" parse node containing a unit field) is valid.
 */
var validUnit = function validUnit(unit) {
  if (typeof unit !== "string") {
    unit = unit.unit;
  }

  return unit in ptPerUnit || unit in relativeUnit || unit === "ex";
};
/*
 * Convert a "size" parse node (with numeric "number" and string "unit" fields,
 * as parsed by functions.js argType "size") into a CSS em value for the
 * current style/scale.  `options` gives the current options.
 */

var calculateSize = function calculateSize(sizeValue, options) {
  var scale;

  if (sizeValue.unit in ptPerUnit) {
    // Absolute units
    scale = ptPerUnit[sizeValue.unit] // Convert unit to pt
    / options.fontMetrics().ptPerEm // Convert pt to CSS em
    / options.sizeMultiplier; // Unscale to make absolute units
  } else if (sizeValue.unit === "mu") {
    // `mu` units scale with scriptstyle/scriptscriptstyle.
    scale = options.fontMetrics().cssEmPerMu;
  } else {
    // Other relative units always refer to the *textstyle* font
    // in the current size.
    var unitOptions;

    if (options.style.isTight()) {
      // isTight() means current style is script/scriptscript.
      unitOptions = options.havingStyle(options.style.text());
    } else {
      unitOptions = options;
    } // TODO: In TeX these units are relative to the quad of the current
    // *text* font, e.g. cmr10. KaTeX instead uses values from the
    // comparably-sized *Computer Modern symbol* font. At 10pt, these
    // match. At 7pt and 5pt, they differ: cmr7=1.138894, cmsy7=1.170641;
    // cmr5=1.361133, cmsy5=1.472241. Consider $\scriptsize a\kern1emb$.
    // TeX \showlists shows a kern of 1.13889 * fontsize;
    // KaTeX shows a kern of 1.171 * fontsize.


    if (sizeValue.unit === "ex") {
      scale = unitOptions.fontMetrics().xHeight;
    } else if (sizeValue.unit === "em") {
      scale = unitOptions.fontMetrics().quad;
    } else {
      throw new src_ParseError("Invalid unit: '" + sizeValue.unit + "'");
    }

    if (unitOptions !== options) {
      scale *= unitOptions.sizeMultiplier / options.sizeMultiplier;
    }
  }

  return Math.min(sizeValue.number * scale, options.maxSize);
};
/**
 * Round `n` to 4 decimal places, or to the nearest 1/10,000th em. See
 * https://github.com/KaTeX/KaTeX/pull/2460.
 */

var makeEm = function makeEm(n) {
  return +n.toFixed(4) + "em";
};
/**
 * These objects store the data about the DOM nodes we create, as well as some
 * extra data. They can then be transformed into real DOM nodes with the
 * `toNode` function or HTML markup using `toMarkup`. They are useful for both
 * storing extra properties on the nodes, as well as providing a way to easily
 * work with the DOM.
 *
 * Similar functions for working with MathML nodes exist in mathMLTree.js.
 *
 * TODO: refactor `span` and `anchor` into common superclass when
 * target environments support class inheritance
 */






/**
 * Create an HTML className based on a list of classes. In addition to joining
 * with spaces, we also remove empty classes.
 */
var createClass = function createClass(classes) {
  return classes.filter(function (cls) {
    return cls;
  }).join(" ");
};

var initNode = function initNode(classes, options, style) {
  this.classes = classes || [];
  this.attributes = {};
  this.height = 0;
  this.depth = 0;
  this.maxFontSize = 0;
  this.style = style || {};

  if (options) {
    if (options.style.isTight()) {
      this.classes.push("mtight");
    }

    var color = options.getColor();

    if (color) {
      this.style.color = color;
    }
  }
};
/**
 * Convert into an HTML node
 */


var _toNode = function toNode(tagName) {
  var node = document.createElement(tagName); // Apply the class

  node.className = createClass(this.classes); // Apply inline styles

  for (var style in this.style) {
    if (this.style.hasOwnProperty(style)) {
      // $FlowFixMe Flow doesn't seem to understand span.style's type.
      node.style[style] = this.style[style];
    }
  } // Apply attributes


  for (var attr in this.attributes) {
    if (this.attributes.hasOwnProperty(attr)) {
      node.setAttribute(attr, this.attributes[attr]);
    }
  } // Append the children, also as HTML nodes


  for (var i = 0; i < this.children.length; i++) {
    node.appendChild(this.children[i].toNode());
  }

  return node;
};
/**
 * Convert into an HTML markup string
 */


var _toMarkup = function toMarkup(tagName) {
  var markup = "<" + tagName; // Add the class

  if (this.classes.length) {
    markup += " class=\"" + utils.escape(createClass(this.classes)) + "\"";
  }

  var styles = ""; // Add the styles, after hyphenation

  for (var style in this.style) {
    if (this.style.hasOwnProperty(style)) {
      styles += utils.hyphenate(style) + ":" + this.style[style] + ";";
    }
  }

  if (styles) {
    markup += " style=\"" + utils.escape(styles) + "\"";
  } // Add the attributes


  for (var attr in this.attributes) {
    if (this.attributes.hasOwnProperty(attr)) {
      markup += " " + attr + "=\"" + utils.escape(this.attributes[attr]) + "\"";
    }
  }

  markup += ">"; // Add the markup of the children, also as markup

  for (var i = 0; i < this.children.length; i++) {
    markup += this.children[i].toMarkup();
  }

  markup += "</" + tagName + ">";
  return markup;
}; // Making the type below exact with all optional fields doesn't work due to
// - https://github.com/facebook/flow/issues/4582
// - https://github.com/facebook/flow/issues/5688
// However, since *all* fields are optional, $Shape<> works as suggested in 5688
// above.
// This type does not include all CSS properties. Additional properties should
// be added as needed.


/**
 * This node represents a span node, with a className, a list of children, and
 * an inline style. It also contains information about its height, depth, and
 * maxFontSize.
 *
 * Represents two types with different uses: SvgSpan to wrap an SVG and DomSpan
 * otherwise. This typesafety is important when HTML builders access a span's
 * children.
 */
var Span = /*#__PURE__*/function () {
  function Span(classes, children, options, style) {
    this.children = void 0;
    this.attributes = void 0;
    this.classes = void 0;
    this.height = void 0;
    this.depth = void 0;
    this.width = void 0;
    this.maxFontSize = void 0;
    this.style = void 0;
    initNode.call(this, classes, options, style);
    this.children = children || [];
  }
  /**
   * Sets an arbitrary attribute on the span. Warning: use this wisely. Not
   * all browsers support attributes the same, and having too many custom
   * attributes is probably bad.
   */


  var _proto = Span.prototype;

  _proto.setAttribute = function setAttribute(attribute, value) {
    this.attributes[attribute] = value;
  };

  _proto.hasClass = function hasClass(className) {
    return utils.contains(this.classes, className);
  };

  _proto.toNode = function toNode() {
    return _toNode.call(this, "span");
  };

  _proto.toMarkup = function toMarkup() {
    return _toMarkup.call(this, "span");
  };

  return Span;
}();
/**
 * This node represents an anchor (<a>) element with a hyperlink.  See `span`
 * for further details.
 */

var Anchor = /*#__PURE__*/function () {
  function Anchor(href, classes, children, options) {
    this.children = void 0;
    this.attributes = void 0;
    this.classes = void 0;
    this.height = void 0;
    this.depth = void 0;
    this.maxFontSize = void 0;
    this.style = void 0;
    initNode.call(this, classes, options);
    this.children = children || [];
    this.setAttribute('href', href);
  }

  var _proto2 = Anchor.prototype;

  _proto2.setAttribute = function setAttribute(attribute, value) {
    this.attributes[attribute] = value;
  };

  _proto2.hasClass = function hasClass(className) {
    return utils.contains(this.classes, className);
  };

  _proto2.toNode = function toNode() {
    return _toNode.call(this, "a");
  };

  _proto2.toMarkup = function toMarkup() {
    return _toMarkup.call(this, "a");
  };

  return Anchor;
}();
/**
 * This node represents an image embed (<img>) element.
 */

var Img = /*#__PURE__*/function () {
  function Img(src, alt, style) {
    this.src = void 0;
    this.alt = void 0;
    this.classes = void 0;
    this.height = void 0;
    this.depth = void 0;
    this.maxFontSize = void 0;
    this.style = void 0;
    this.alt = alt;
    this.src = src;
    this.classes = ["mord"];
    this.style = style;
  }

  var _proto3 = Img.prototype;

  _proto3.hasClass = function hasClass(className) {
    return utils.contains(this.classes, className);
  };

  _proto3.toNode = function toNode() {
    var node = document.createElement("img");
    node.src = this.src;
    node.alt = this.alt;
    node.className = "mord"; // Apply inline styles

    for (var style in this.style) {
      if (this.style.hasOwnProperty(style)) {
        // $FlowFixMe
        node.style[style] = this.style[style];
      }
    }

    return node;
  };

  _proto3.toMarkup = function toMarkup() {
    var markup = "<img  src='" + this.src + " 'alt='" + this.alt + "' "; // Add the styles, after hyphenation

    var styles = "";

    for (var style in this.style) {
      if (this.style.hasOwnProperty(style)) {
        styles += utils.hyphenate(style) + ":" + this.style[style] + ";";
      }
    }

    if (styles) {
      markup += " style=\"" + utils.escape(styles) + "\"";
    }

    markup += "'/>";
    return markup;
  };

  return Img;
}();
var iCombinations = {
  'î': "\u0131\u0302",
  'ï': "\u0131\u0308",
  'í': "\u0131\u0301",
  // 'ī': '\u0131\u0304', // enable when we add Extended Latin
  'ì': "\u0131\u0300"
};
/**
 * A symbol node contains information about a single symbol. It either renders
 * to a single text node, or a span with a single text node in it, depending on
 * whether it has CSS classes, styles, or needs italic correction.
 */

var SymbolNode = /*#__PURE__*/function () {
  function SymbolNode(text, height, depth, italic, skew, width, classes, style) {
    this.text = void 0;
    this.height = void 0;
    this.depth = void 0;
    this.italic = void 0;
    this.skew = void 0;
    this.width = void 0;
    this.maxFontSize = void 0;
    this.classes = void 0;
    this.style = void 0;
    this.text = text;
    this.height = height || 0;
    this.depth = depth || 0;
    this.italic = italic || 0;
    this.skew = skew || 0;
    this.width = width || 0;
    this.classes = classes || [];
    this.style = style || {};
    this.maxFontSize = 0; // Mark text from non-Latin scripts with specific classes so that we
    // can specify which fonts to use.  This allows us to render these
    // characters with a serif font in situations where the browser would
    // either default to a sans serif or render a placeholder character.
    // We use CSS class names like cjk_fallback, hangul_fallback and
    // brahmic_fallback. See ./unicodeScripts.js for the set of possible
    // script names

    var script = scriptFromCodepoint(this.text.charCodeAt(0));

    if (script) {
      this.classes.push(script + "_fallback");
    }

    if (/[îïíì]/.test(this.text)) {
      // add ī when we add Extended Latin
      this.text = iCombinations[this.text];
    }
  }

  var _proto4 = SymbolNode.prototype;

  _proto4.hasClass = function hasClass(className) {
    return utils.contains(this.classes, className);
  }
  /**
   * Creates a text node or span from a symbol node. Note that a span is only
   * created if it is needed.
   */
  ;

  _proto4.toNode = function toNode() {
    var node = document.createTextNode(this.text);
    var span = null;

    if (this.italic > 0) {
      span = document.createElement("span");
      span.style.marginRight = makeEm(this.italic);
    }

    if (this.classes.length > 0) {
      span = span || document.createElement("span");
      span.className = createClass(this.classes);
    }

    for (var style in this.style) {
      if (this.style.hasOwnProperty(style)) {
        span = span || document.createElement("span"); // $FlowFixMe Flow doesn't seem to understand span.style's type.

        span.style[style] = this.style[style];
      }
    }

    if (span) {
      span.appendChild(node);
      return span;
    } else {
      return node;
    }
  }
  /**
   * Creates markup for a symbol node.
   */
  ;

  _proto4.toMarkup = function toMarkup() {
    // TODO(alpert): More duplication than I'd like from
    // span.prototype.toMarkup and symbolNode.prototype.toNode...
    var needsSpan = false;
    var markup = "<span";

    if (this.classes.length) {
      needsSpan = true;
      markup += " class=\"";
      markup += utils.escape(createClass(this.classes));
      markup += "\"";
    }

    var styles = "";

    if (this.italic > 0) {
      styles += "margin-right:" + this.italic + "em;";
    }

    for (var style in this.style) {
      if (this.style.hasOwnProperty(style)) {
        styles += utils.hyphenate(style) + ":" + this.style[style] + ";";
      }
    }

    if (styles) {
      needsSpan = true;
      markup += " style=\"" + utils.escape(styles) + "\"";
    }

    var escaped = utils.escape(this.text);

    if (needsSpan) {
      markup += ">";
      markup += escaped;
      markup += "</span>";
      return markup;
    } else {
      return escaped;
    }
  };

  return SymbolNode;
}();
/**
 * SVG nodes are used to render stretchy wide elements.
 */

var SvgNode = /*#__PURE__*/function () {
  function SvgNode(children, attributes) {
    this.children = void 0;
    this.attributes = void 0;
    this.children = children || [];
    this.attributes = attributes || {};
  }

  var _proto5 = SvgNode.prototype;

  _proto5.toNode = function toNode() {
    var svgNS = "http://www.w3.org/2000/svg";
    var node = document.createElementNS(svgNS, "svg"); // Apply attributes

    for (var attr in this.attributes) {
      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
        node.setAttribute(attr, this.attributes[attr]);
      }
    }

    for (var i = 0; i < this.children.length; i++) {
      node.appendChild(this.children[i].toNode());
    }

    return node;
  };

  _proto5.toMarkup = function toMarkup() {
    var markup = "<svg xmlns=\"http://www.w3.org/2000/svg\""; // Apply attributes

    for (var attr in this.attributes) {
      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
        markup += " " + attr + "='" + this.attributes[attr] + "'";
      }
    }

    markup += ">";

    for (var i = 0; i < this.children.length; i++) {
      markup += this.children[i].toMarkup();
    }

    markup += "</svg>";
    return markup;
  };

  return SvgNode;
}();
var PathNode = /*#__PURE__*/function () {
  function PathNode(pathName, alternate) {
    this.pathName = void 0;
    this.alternate = void 0;
    this.pathName = pathName;
    this.alternate = alternate; // Used only for \sqrt, \phase, & tall delims
  }

  var _proto6 = PathNode.prototype;

  _proto6.toNode = function toNode() {
    var svgNS = "http://www.w3.org/2000/svg";
    var node = document.createElementNS(svgNS, "path");

    if (this.alternate) {
      node.setAttribute("d", this.alternate);
    } else {
      node.setAttribute("d", path[this.pathName]);
    }

    return node;
  };

  _proto6.toMarkup = function toMarkup() {
    if (this.alternate) {
      return "<path d='" + this.alternate + "'/>";
    } else {
      return "<path d='" + path[this.pathName] + "'/>";
    }
  };

  return PathNode;
}();
var LineNode = /*#__PURE__*/function () {
  function LineNode(attributes) {
    this.attributes = void 0;
    this.attributes = attributes || {};
  }

  var _proto7 = LineNode.prototype;

  _proto7.toNode = function toNode() {
    var svgNS = "http://www.w3.org/2000/svg";
    var node = document.createElementNS(svgNS, "line"); // Apply attributes

    for (var attr in this.attributes) {
      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
        node.setAttribute(attr, this.attributes[attr]);
      }
    }

    return node;
  };

  _proto7.toMarkup = function toMarkup() {
    var markup = "<line";

    for (var attr in this.attributes) {
      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
        markup += " " + attr + "='" + this.attributes[attr] + "'";
      }
    }

    markup += "/>";
    return markup;
  };

  return LineNode;
}();
function assertSymbolDomNode(group) {
  if (group instanceof SymbolNode) {
    return group;
  } else {
    throw new Error("Expected symbolNode but got " + String(group) + ".");
  }
}
function assertSpan(group) {
  if (group instanceof Span) {
    return group;
  } else {
    throw new Error("Expected span<HtmlDomNode> but got " + String(group) + ".");
  }
}
/**
 * This file holds a list of all no-argument functions and single-character
 * symbols (like 'a' or ';').
 *
 * For each of the symbols, there are three properties they can have:
 * - font (required): the font to be used for this symbol. Either "main" (the
     normal font), or "ams" (the ams fonts).
 * - group (required): the ParseNode group type the symbol should have (i.e.
     "textord", "mathord", etc).
     See https://github.com/KaTeX/KaTeX/wiki/Examining-TeX#group-types
 * - replace: the character that this symbol or function should be
 *   replaced with (i.e. "\phi" has a replace value of "\u03d5", the phi
 *   character in the main font).
 *
 * The outermost map in the table indicates what mode the symbols should be
 * accepted in (e.g. "math" or "text").
 */
// Some of these have a "-token" suffix since these are also used as `ParseNode`
// types for raw text tokens, and we want to avoid conflicts with higher-level
// `ParseNode` types. These `ParseNode`s are constructed within `Parser` by
// looking up the `symbols` map.
var ATOMS = {
  "bin": 1,
  "close": 1,
  "inner": 1,
  "open": 1,
  "punct": 1,
  "rel": 1
};
var NON_ATOMS = {
  "accent-token": 1,
  "mathord": 1,
  "op-token": 1,
  "spacing": 1,
  "textord": 1
};
var symbols = {
  "math": {},
  "text": {}
};
/* harmony default export */ var src_symbols = (symbols);
/** `acceptUnicodeChar = true` is only applicable if `replace` is set. */

function defineSymbol(mode, font, group, replace, name, acceptUnicodeChar) {
  symbols[mode][name] = {
    font: font,
    group: group,
    replace: replace
  };

  if (acceptUnicodeChar && replace) {
    symbols[mode][replace] = symbols[mode][name];
  }
} // Some abbreviations for commonly used strings.
// This helps minify the code, and also spotting typos using jshint.
// modes:

var math = "math";
var symbols_text = "text"; // fonts:

var main = "main";
var ams = "ams"; // groups:

var accent = "accent-token";
var bin = "bin";
var symbols_close = "close";
var inner = "inner";
var mathord = "mathord";
var op = "op-token";
var symbols_open = "open";
var punct = "punct";
var rel = "rel";
var spacing = "spacing";
var textord = "textord"; // Now comes the symbol table
// Relation Symbols

defineSymbol(math, main, rel, "\u2261", "\\equiv", true);
defineSymbol(math, main, rel, "\u227A", "\\prec", true);
defineSymbol(math, main, rel, "\u227B", "\\succ", true);
defineSymbol(math, main, rel, "\u223C", "\\sim", true);
defineSymbol(math, main, rel, "\u22A5", "\\perp");
defineSymbol(math, main, rel, "\u2AAF", "\\preceq", true);
defineSymbol(math, main, rel, "\u2AB0", "\\succeq", true);
defineSymbol(math, main, rel, "\u2243", "\\simeq", true);
defineSymbol(math, main, rel, "\u2223", "\\mid", true);
defineSymbol(math, main, rel, "\u226A", "\\ll", true);
defineSymbol(math, main, rel, "\u226B", "\\gg", true);
defineSymbol(math, main, rel, "\u224D", "\\asymp", true);
defineSymbol(math, main, rel, "\u2225", "\\parallel");
defineSymbol(math, main, rel, "\u22C8", "\\bowtie", true);
defineSymbol(math, main, rel, "\u2323", "\\smile", true);
defineSymbol(math, main, rel, "\u2291", "\\sqsubseteq", true);
defineSymbol(math, main, rel, "\u2292", "\\sqsupseteq", true);
defineSymbol(math, main, rel, "\u2250", "\\doteq", true);
defineSymbol(math, main, rel, "\u2322", "\\frown", true);
defineSymbol(math, main, rel, "\u220B", "\\ni", true);
defineSymbol(math, main, rel, "\u221D", "\\propto", true);
defineSymbol(math, main, rel, "\u22A2", "\\vdash", true);
defineSymbol(math, main, rel, "\u22A3", "\\dashv", true);
defineSymbol(math, main, rel, "\u220B", "\\owns"); // Punctuation

defineSymbol(math, main, punct, ".", "\\ldotp");
defineSymbol(math, main, punct, "\u22C5", "\\cdotp"); // Misc Symbols

defineSymbol(math, main, textord, "#", "\\#");
defineSymbol(symbols_text, main, textord, "#", "\\#");
defineSymbol(math, main, textord, "&", "\\&");
defineSymbol(symbols_text, main, textord, "&", "\\&");
defineSymbol(math, main, textord, "\u2135", "\\aleph", true);
defineSymbol(math, main, textord, "\u2200", "\\forall", true);
defineSymbol(math, main, textord, "\u210F", "\\hbar", true);
defineSymbol(math, main, textord, "\u2203", "\\exists", true);
defineSymbol(math, main, textord, "\u2207", "\\nabla", true);
defineSymbol(math, main, textord, "\u266D", "\\flat", true);
defineSymbol(math, main, textord, "\u2113", "\\ell", true);
defineSymbol(math, main, textord, "\u266E", "\\natural", true);
defineSymbol(math, main, textord, "\u2663", "\\clubsuit", true);
defineSymbol(math, main, textord, "\u2118", "\\wp", true);
defineSymbol(math, main, textord, "\u266F", "\\sharp", true);
defineSymbol(math, main, textord, "\u2662", "\\diamondsuit", true);
defineSymbol(math, main, textord, "\u211C", "\\Re", true);
defineSymbol(math, main, textord, "\u2661", "\\heartsuit", true);
defineSymbol(math, main, textord, "\u2111", "\\Im", true);
defineSymbol(math, main, textord, "\u2660", "\\spadesuit", true);
defineSymbol(math, main, textord, "\xA7", "\\S", true);
defineSymbol(symbols_text, main, textord, "\xA7", "\\S");
defineSymbol(math, main, textord, "\xB6", "\\P", true);
defineSymbol(symbols_text, main, textord, "\xB6", "\\P"); // Math and Text

defineSymbol(math, main, textord, "\u2020", "\\dag");
defineSymbol(symbols_text, main, textord, "\u2020", "\\dag");
defineSymbol(symbols_text, main, textord, "\u2020", "\\textdagger");
defineSymbol(math, main, textord, "\u2021", "\\ddag");
defineSymbol(symbols_text, main, textord, "\u2021", "\\ddag");
defineSymbol(symbols_text, main, textord, "\u2021", "\\textdaggerdbl"); // Large Delimiters

defineSymbol(math, main, symbols_close, "\u23B1", "\\rmoustache", true);
defineSymbol(math, main, symbols_open, "\u23B0", "\\lmoustache", true);
defineSymbol(math, main, symbols_close, "\u27EF", "\\rgroup", true);
defineSymbol(math, main, symbols_open, "\u27EE", "\\lgroup", true); // Binary Operators

defineSymbol(math, main, bin, "\u2213", "\\mp", true);
defineSymbol(math, main, bin, "\u2296", "\\ominus", true);
defineSymbol(math, main, bin, "\u228E", "\\uplus", true);
defineSymbol(math, main, bin, "\u2293", "\\sqcap", true);
defineSymbol(math, main, bin, "\u2217", "\\ast");
defineSymbol(math, main, bin, "\u2294", "\\sqcup", true);
defineSymbol(math, main, bin, "\u25EF", "\\bigcirc", true);
defineSymbol(math, main, bin, "\u2219", "\\bullet");
defineSymbol(math, main, bin, "\u2021", "\\ddagger");
defineSymbol(math, main, bin, "\u2240", "\\wr", true);
defineSymbol(math, main, bin, "\u2A3F", "\\amalg");
defineSymbol(math, main, bin, "&", "\\And"); // from amsmath
// Arrow Symbols

defineSymbol(math, main, rel, "\u27F5", "\\longleftarrow", true);
defineSymbol(math, main, rel, "\u21D0", "\\Leftarrow", true);
defineSymbol(math, main, rel, "\u27F8", "\\Longleftarrow", true);
defineSymbol(math, main, rel, "\u27F6", "\\longrightarrow", true);
defineSymbol(math, main, rel, "\u21D2", "\\Rightarrow", true);
defineSymbol(math, main, rel, "\u27F9", "\\Longrightarrow", true);
defineSymbol(math, main, rel, "\u2194", "\\leftrightarrow", true);
defineSymbol(math, main, rel, "\u27F7", "\\longleftrightarrow", true);
defineSymbol(math, main, rel, "\u21D4", "\\Leftrightarrow", true);
defineSymbol(math, main, rel, "\u27FA", "\\Longleftrightarrow", true);
defineSymbol(math, main, rel, "\u21A6", "\\mapsto", true);
defineSymbol(math, main, rel, "\u27FC", "\\longmapsto", true);
defineSymbol(math, main, rel, "\u2197", "\\nearrow", true);
defineSymbol(math, main, rel, "\u21A9", "\\hookleftarrow", true);
defineSymbol(math, main, rel, "\u21AA", "\\hookrightarrow", true);
defineSymbol(math, main, rel, "\u2198", "\\searrow", true);
defineSymbol(math, main, rel, "\u21BC", "\\leftharpoonup", true);
defineSymbol(math, main, rel, "\u21C0", "\\rightharpoonup", true);
defineSymbol(math, main, rel, "\u2199", "\\swarrow", true);
defineSymbol(math, main, rel, "\u21BD", "\\leftharpoondown", true);
defineSymbol(math, main, rel, "\u21C1", "\\rightharpoondown", true);
defineSymbol(math, main, rel, "\u2196", "\\nwarrow", true);
defineSymbol(math, main, rel, "\u21CC", "\\rightleftharpoons", true); // AMS Negated Binary Relations

defineSymbol(math, ams, rel, "\u226E", "\\nless", true); // Symbol names preceeded by "@" each have a corresponding macro.

defineSymbol(math, ams, rel, "\uE010", "\\@nleqslant");
defineSymbol(math, ams, rel, "\uE011", "\\@nleqq");
defineSymbol(math, ams, rel, "\u2A87", "\\lneq", true);
defineSymbol(math, ams, rel, "\u2268", "\\lneqq", true);
defineSymbol(math, ams, rel, "\uE00C", "\\@lvertneqq");
defineSymbol(math, ams, rel, "\u22E6", "\\lnsim", true);
defineSymbol(math, ams, rel, "\u2A89", "\\lnapprox", true);
defineSymbol(math, ams, rel, "\u2280", "\\nprec", true); // unicode-math maps \u22e0 to \npreccurlyeq. We'll use the AMS synonym.

defineSymbol(math, ams, rel, "\u22E0", "\\npreceq", true);
defineSymbol(math, ams, rel, "\u22E8", "\\precnsim", true);
defineSymbol(math, ams, rel, "\u2AB9", "\\precnapprox", true);
defineSymbol(math, ams, rel, "\u2241", "\\nsim", true);
defineSymbol(math, ams, rel, "\uE006", "\\@nshortmid");
defineSymbol(math, ams, rel, "\u2224", "\\nmid", true);
defineSymbol(math, ams, rel, "\u22AC", "\\nvdash", true);
defineSymbol(math, ams, rel, "\u22AD", "\\nvDash", true);
defineSymbol(math, ams, rel, "\u22EA", "\\ntriangleleft");
defineSymbol(math, ams, rel, "\u22EC", "\\ntrianglelefteq", true);
defineSymbol(math, ams, rel, "\u228A", "\\subsetneq", true);
defineSymbol(math, ams, rel, "\uE01A", "\\@varsubsetneq");
defineSymbol(math, ams, rel, "\u2ACB", "\\subsetneqq", true);
defineSymbol(math, ams, rel, "\uE017", "\\@varsubsetneqq");
defineSymbol(math, ams, rel, "\u226F", "\\ngtr", true);
defineSymbol(math, ams, rel, "\uE00F", "\\@ngeqslant");
defineSymbol(math, ams, rel, "\uE00E", "\\@ngeqq");
defineSymbol(math, ams, rel, "\u2A88", "\\gneq", true);
defineSymbol(math, ams, rel, "\u2269", "\\gneqq", true);
defineSymbol(math, ams, rel, "\uE00D", "\\@gvertneqq");
defineSymbol(math, ams, rel, "\u22E7", "\\gnsim", true);
defineSymbol(math, ams, rel, "\u2A8A", "\\gnapprox", true);
defineSymbol(math, ams, rel, "\u2281", "\\nsucc", true); // unicode-math maps \u22e1 to \nsucccurlyeq. We'll use the AMS synonym.

defineSymbol(math, ams, rel, "\u22E1", "\\nsucceq", true);
defineSymbol(math, ams, rel, "\u22E9", "\\succnsim", true);
defineSymbol(math, ams, rel, "\u2ABA", "\\succnapprox", true); // unicode-math maps \u2246 to \simneqq. We'll use the AMS synonym.

defineSymbol(math, ams, rel, "\u2246", "\\ncong", true);
defineSymbol(math, ams, rel, "\uE007", "\\@nshortparallel");
defineSymbol(math, ams, rel, "\u2226", "\\nparallel", true);
defineSymbol(math, ams, rel, "\u22AF", "\\nVDash", true);
defineSymbol(math, ams, rel, "\u22EB", "\\ntriangleright");
defineSymbol(math, ams, rel, "\u22ED", "\\ntrianglerighteq", true);
defineSymbol(math, ams, rel, "\uE018", "\\@nsupseteqq");
defineSymbol(math, ams, rel, "\u228B", "\\supsetneq", true);
defineSymbol(math, ams, rel, "\uE01B", "\\@varsupsetneq");
defineSymbol(math, ams, rel, "\u2ACC", "\\supsetneqq", true);
defineSymbol(math, ams, rel, "\uE019", "\\@varsupsetneqq");
defineSymbol(math, ams, rel, "\u22AE", "\\nVdash", true);
defineSymbol(math, ams, rel, "\u2AB5", "\\precneqq", true);
defineSymbol(math, ams, rel, "\u2AB6", "\\succneqq", true);
defineSymbol(math, ams, rel, "\uE016", "\\@nsubseteqq");
defineSymbol(math, ams, bin, "\u22B4", "\\unlhd");
defineSymbol(math, ams, bin, "\u22B5", "\\unrhd"); // AMS Negated Arrows

defineSymbol(math, ams, rel, "\u219A", "\\nleftarrow", true);
defineSymbol(math, ams, rel, "\u219B", "\\nrightarrow", true);
defineSymbol(math, ams, rel, "\u21CD", "\\nLeftarrow", true);
defineSymbol(math, ams, rel, "\u21CF", "\\nRightarrow", true);
defineSymbol(math, ams, rel, "\u21AE", "\\nleftrightarrow", true);
defineSymbol(math, ams, rel, "\u21CE", "\\nLeftrightarrow", true); // AMS Misc

defineSymbol(math, ams, rel, "\u25B3", "\\vartriangle");
defineSymbol(math, ams, textord, "\u210F", "\\hslash");
defineSymbol(math, ams, textord, "\u25BD", "\\triangledown");
defineSymbol(math, ams, textord, "\u25CA", "\\lozenge");
defineSymbol(math, ams, textord, "\u24C8", "\\circledS");
defineSymbol(math, ams, textord, "\xAE", "\\circledR");
defineSymbol(symbols_text, ams, textord, "\xAE", "\\circledR");
defineSymbol(math, ams, textord, "\u2221", "\\measuredangle", true);
defineSymbol(math, ams, textord, "\u2204", "\\nexists");
defineSymbol(math, ams, textord, "\u2127", "\\mho");
defineSymbol(math, ams, textord, "\u2132", "\\Finv", true);
defineSymbol(math, ams, textord, "\u2141", "\\Game", true);
defineSymbol(math, ams, textord, "\u2035", "\\backprime");
defineSymbol(math, ams, textord, "\u25B2", "\\blacktriangle");
defineSymbol(math, ams, textord, "\u25BC", "\\blacktriangledown");
defineSymbol(math, ams, textord, "\u25A0", "\\blacksquare");
defineSymbol(math, ams, textord, "\u29EB", "\\blacklozenge");
defineSymbol(math, ams, textord, "\u2605", "\\bigstar");
defineSymbol(math, ams, textord, "\u2222", "\\sphericalangle", true);
defineSymbol(math, ams, textord, "\u2201", "\\complement", true); // unicode-math maps U+F0 to \matheth. We map to AMS function \eth

defineSymbol(math, ams, textord, "\xF0", "\\eth", true);
defineSymbol(symbols_text, main, textord, "\xF0", "\xF0");
defineSymbol(math, ams, textord, "\u2571", "\\diagup");
defineSymbol(math, ams, textord, "\u2572", "\\diagdown");
defineSymbol(math, ams, textord, "\u25A1", "\\square");
defineSymbol(math, ams, textord, "\u25A1", "\\Box");
defineSymbol(math, ams, textord, "\u25CA", "\\Diamond"); // unicode-math maps U+A5 to \mathyen. We map to AMS function \yen

defineSymbol(math, ams, textord, "\xA5", "\\yen", true);
defineSymbol(symbols_text, ams, textord, "\xA5", "\\yen", true);
defineSymbol(math, ams, textord, "\u2713", "\\checkmark", true);
defineSymbol(symbols_text, ams, textord, "\u2713", "\\checkmark"); // AMS Hebrew

defineSymbol(math, ams, textord, "\u2136", "\\beth", true);
defineSymbol(math, ams, textord, "\u2138", "\\daleth", true);
defineSymbol(math, ams, textord, "\u2137", "\\gimel", true); // AMS Greek

defineSymbol(math, ams, textord, "\u03DD", "\\digamma", true);
defineSymbol(math, ams, textord, "\u03F0", "\\varkappa"); // AMS Delimiters

defineSymbol(math, ams, symbols_open, "\u250C", "\\@ulcorner", true);
defineSymbol(math, ams, symbols_close, "\u2510", "\\@urcorner", true);
defineSymbol(math, ams, symbols_open, "\u2514", "\\@llcorner", true);
defineSymbol(math, ams, symbols_close, "\u2518", "\\@lrcorner", true); // AMS Binary Relations

defineSymbol(math, ams, rel, "\u2266", "\\leqq", true);
defineSymbol(math, ams, rel, "\u2A7D", "\\leqslant", true);
defineSymbol(math, ams, rel, "\u2A95", "\\eqslantless", true);
defineSymbol(math, ams, rel, "\u2272", "\\lesssim", true);
defineSymbol(math, ams, rel, "\u2A85", "\\lessapprox", true);
defineSymbol(math, ams, rel, "\u224A", "\\approxeq", true);
defineSymbol(math, ams, bin, "\u22D6", "\\lessdot");
defineSymbol(math, ams, rel, "\u22D8", "\\lll", true);
defineSymbol(math, ams, rel, "\u2276", "\\lessgtr", true);
defineSymbol(math, ams, rel, "\u22DA", "\\lesseqgtr", true);
defineSymbol(math, ams, rel, "\u2A8B", "\\lesseqqgtr", true);
defineSymbol(math, ams, rel, "\u2251", "\\doteqdot");
defineSymbol(math, ams, rel, "\u2253", "\\risingdotseq", true);
defineSymbol(math, ams, rel, "\u2252", "\\fallingdotseq", true);
defineSymbol(math, ams, rel, "\u223D", "\\backsim", true);
defineSymbol(math, ams, rel, "\u22CD", "\\backsimeq", true);
defineSymbol(math, ams, rel, "\u2AC5", "\\subseteqq", true);
defineSymbol(math, ams, rel, "\u22D0", "\\Subset", true);
defineSymbol(math, ams, rel, "\u228F", "\\sqsubset", true);
defineSymbol(math, ams, rel, "\u227C", "\\preccurlyeq", true);
defineSymbol(math, ams, rel, "\u22DE", "\\curlyeqprec", true);
defineSymbol(math, ams, rel, "\u227E", "\\precsim", true);
defineSymbol(math, ams, rel, "\u2AB7", "\\precapprox", true);
defineSymbol(math, ams, rel, "\u22B2", "\\vartriangleleft");
defineSymbol(math, ams, rel, "\u22B4", "\\trianglelefteq");
defineSymbol(math, ams, rel, "\u22A8", "\\vDash", true);
defineSymbol(math, ams, rel, "\u22AA", "\\Vvdash", true);
defineSymbol(math, ams, rel, "\u2323", "\\smallsmile");
defineSymbol(math, ams, rel, "\u2322", "\\smallfrown");
defineSymbol(math, ams, rel, "\u224F", "\\bumpeq", true);
defineSymbol(math, ams, rel, "\u224E", "\\Bumpeq", true);
defineSymbol(math, ams, rel, "\u2267", "\\geqq", true);
defineSymbol(math, ams, rel, "\u2A7E", "\\geqslant", true);
defineSymbol(math, ams, rel, "\u2A96", "\\eqslantgtr", true);
defineSymbol(math, ams, rel, "\u2273", "\\gtrsim", true);
defineSymbol(math, ams, rel, "\u2A86", "\\gtrapprox", true);
defineSymbol(math, ams, bin, "\u22D7", "\\gtrdot");
defineSymbol(math, ams, rel, "\u22D9", "\\ggg", true);
defineSymbol(math, ams, rel, "\u2277", "\\gtrless", true);
defineSymbol(math, ams, rel, "\u22DB", "\\gtreqless", true);
defineSymbol(math, ams, rel, "\u2A8C", "\\gtreqqless", true);
defineSymbol(math, ams, rel, "\u2256", "\\eqcirc", true);
defineSymbol(math, ams, rel, "\u2257", "\\circeq", true);
defineSymbol(math, ams, rel, "\u225C", "\\triangleq", true);
defineSymbol(math, ams, rel, "\u223C", "\\thicksim");
defineSymbol(math, ams, rel, "\u2248", "\\thickapprox");
defineSymbol(math, ams, rel, "\u2AC6", "\\supseteqq", true);
defineSymbol(math, ams, rel, "\u22D1", "\\Supset", true);
defineSymbol(math, ams, rel, "\u2290", "\\sqsupset", true);
defineSymbol(math, ams, rel, "\u227D", "\\succcurlyeq", true);
defineSymbol(math, ams, rel, "\u22DF", "\\curlyeqsucc", true);
defineSymbol(math, ams, rel, "\u227F", "\\succsim", true);
defineSymbol(math, ams, rel, "\u2AB8", "\\succapprox", true);
defineSymbol(math, ams, rel, "\u22B3", "\\vartriangleright");
defineSymbol(math, ams, rel, "\u22B5", "\\trianglerighteq");
defineSymbol(math, ams, rel, "\u22A9", "\\Vdash", true);
defineSymbol(math, ams, rel, "\u2223", "\\shortmid");
defineSymbol(math, ams, rel, "\u2225", "\\shortparallel");
defineSymbol(math, ams, rel, "\u226C", "\\between", true);
defineSymbol(math, ams, rel, "\u22D4", "\\pitchfork", true);
defineSymbol(math, ams, rel, "\u221D", "\\varpropto");
defineSymbol(math, ams, rel, "\u25C0", "\\blacktriangleleft"); // unicode-math says that \therefore is a mathord atom.
// We kept the amssymb atom type, which is rel.

defineSymbol(math, ams, rel, "\u2234", "\\therefore", true);
defineSymbol(math, ams, rel, "\u220D", "\\backepsilon");
defineSymbol(math, ams, rel, "\u25B6", "\\blacktriangleright"); // unicode-math says that \because is a mathord atom.
// We kept the amssymb atom type, which is rel.

defineSymbol(math, ams, rel, "\u2235", "\\because", true);
defineSymbol(math, ams, rel, "\u22D8", "\\llless");
defineSymbol(math, ams, rel, "\u22D9", "\\gggtr");
defineSymbol(math, ams, bin, "\u22B2", "\\lhd");
defineSymbol(math, ams, bin, "\u22B3", "\\rhd");
defineSymbol(math, ams, rel, "\u2242", "\\eqsim", true);
defineSymbol(math, main, rel, "\u22C8", "\\Join");
defineSymbol(math, ams, rel, "\u2251", "\\Doteq", true); // AMS Binary Operators

defineSymbol(math, ams, bin, "\u2214", "\\dotplus", true);
defineSymbol(math, ams, bin, "\u2216", "\\smallsetminus");
defineSymbol(math, ams, bin, "\u22D2", "\\Cap", true);
defineSymbol(math, ams, bin, "\u22D3", "\\Cup", true);
defineSymbol(math, ams, bin, "\u2A5E", "\\doublebarwedge", true);
defineSymbol(math, ams, bin, "\u229F", "\\boxminus", true);
defineSymbol(math, ams, bin, "\u229E", "\\boxplus", true);
defineSymbol(math, ams, bin, "\u22C7", "\\divideontimes", true);
defineSymbol(math, ams, bin, "\u22C9", "\\ltimes", true);
defineSymbol(math, ams, bin, "\u22CA", "\\rtimes", true);
defineSymbol(math, ams, bin, "\u22CB", "\\leftthreetimes", true);
defineSymbol(math, ams, bin, "\u22CC", "\\rightthreetimes", true);
defineSymbol(math, ams, bin, "\u22CF", "\\curlywedge", true);
defineSymbol(math, ams, bin, "\u22CE", "\\curlyvee", true);
defineSymbol(math, ams, bin, "\u229D", "\\circleddash", true);
defineSymbol(math, ams, bin, "\u229B", "\\circledast", true);
defineSymbol(math, ams, bin, "\u22C5", "\\centerdot");
defineSymbol(math, ams, bin, "\u22BA", "\\intercal", true);
defineSymbol(math, ams, bin, "\u22D2", "\\doublecap");
defineSymbol(math, ams, bin, "\u22D3", "\\doublecup");
defineSymbol(math, ams, bin, "\u22A0", "\\boxtimes", true); // AMS Arrows
// Note: unicode-math maps \u21e2 to their own function \rightdasharrow.
// We'll map it to AMS function \dashrightarrow. It produces the same atom.

defineSymbol(math, ams, rel, "\u21E2", "\\dashrightarrow", true); // unicode-math maps \u21e0 to \leftdasharrow. We'll use the AMS synonym.

defineSymbol(math, ams, rel, "\u21E0", "\\dashleftarrow", true);
defineSymbol(math, ams, rel, "\u21C7", "\\leftleftarrows", true);
defineSymbol(math, ams, rel, "\u21C6", "\\leftrightarrows", true);
defineSymbol(math, ams, rel, "\u21DA", "\\Lleftarrow", true);
defineSymbol(math, ams, rel, "\u219E", "\\twoheadleftarrow", true);
defineSymbol(math, ams, rel, "\u21A2", "\\leftarrowtail", true);
defineSymbol(math, ams, rel, "\u21AB", "\\looparrowleft", true);
defineSymbol(math, ams, rel, "\u21CB", "\\leftrightharpoons", true);
defineSymbol(math, ams, rel, "\u21B6", "\\curvearrowleft", true); // unicode-math maps \u21ba to \acwopencirclearrow. We'll use the AMS synonym.

defineSymbol(math, ams, rel, "\u21BA", "\\circlearrowleft", true);
defineSymbol(math, ams, rel, "\u21B0", "\\Lsh", true);
defineSymbol(math, ams, rel, "\u21C8", "\\upuparrows", true);
defineSymbol(math, ams, rel, "\u21BF", "\\upharpoonleft", true);
defineSymbol(math, ams, rel, "\u21C3", "\\downharpoonleft", true);
defineSymbol(math, main, rel, "\u22B6", "\\origof", true); // not in font

defineSymbol(math, main, rel, "\u22B7", "\\imageof", true); // not in font

defineSymbol(math, ams, rel, "\u22B8", "\\multimap", true);
defineSymbol(math, ams, rel, "\u21AD", "\\leftrightsquigarrow", true);
defineSymbol(math, ams, rel, "\u21C9", "\\rightrightarrows", true);
defineSymbol(math, ams, rel, "\u21C4", "\\rightleftarrows", true);
defineSymbol(math, ams, rel, "\u21A0", "\\twoheadrightarrow", true);
defineSymbol(math, ams, rel, "\u21A3", "\\rightarrowtail", true);
defineSymbol(math, ams, rel, "\u21AC", "\\looparrowright", true);
defineSymbol(math, ams, rel, "\u21B7", "\\curvearrowright", true); // unicode-math maps \u21bb to \cwopencirclearrow. We'll use the AMS synonym.

defineSymbol(math, ams, rel, "\u21BB", "\\circlearrowright", true);
defineSymbol(math, ams, rel, "\u21B1", "\\Rsh", true);
defineSymbol(math, ams, rel, "\u21CA", "\\downdownarrows", true);
defineSymbol(math, ams, rel, "\u21BE", "\\upharpoonright", true);
defineSymbol(math, ams, rel, "\u21C2", "\\downharpoonright", true);
defineSymbol(math, ams, rel, "\u21DD", "\\rightsquigarrow", true);
defineSymbol(math, ams, rel, "\u21DD", "\\leadsto");
defineSymbol(math, ams, rel, "\u21DB", "\\Rrightarrow", true);
defineSymbol(math, ams, rel, "\u21BE", "\\restriction");
defineSymbol(math, main, textord, "\u2018", "`");
defineSymbol(math, main, textord, "$", "\\$");
defineSymbol(symbols_text, main, textord, "$", "\\$");
defineSymbol(symbols_text, main, textord, "$", "\\textdollar");
defineSymbol(math, main, textord, "%", "\\%");
defineSymbol(symbols_text, main, textord, "%", "\\%");
defineSymbol(math, main, textord, "_", "\\_");
defineSymbol(symbols_text, main, textord, "_", "\\_");
defineSymbol(symbols_text, main, textord, "_", "\\textunderscore");
defineSymbol(math, main, textord, "\u2220", "\\angle", true);
defineSymbol(math, main, textord, "\u221E", "\\infty", true);
defineSymbol(math, main, textord, "\u2032", "\\prime");
defineSymbol(math, main, textord, "\u25B3", "\\triangle");
defineSymbol(math, main, textord, "\u0393", "\\Gamma", true);
defineSymbol(math, main, textord, "\u0394", "\\Delta", true);
defineSymbol(math, main, textord, "\u0398", "\\Theta", true);
defineSymbol(math, main, textord, "\u039B", "\\Lambda", true);
defineSymbol(math, main, textord, "\u039E", "\\Xi", true);
defineSymbol(math, main, textord, "\u03A0", "\\Pi", true);
defineSymbol(math, main, textord, "\u03A3", "\\Sigma", true);
defineSymbol(math, main, textord, "\u03A5", "\\Upsilon", true);
defineSymbol(math, main, textord, "\u03A6", "\\Phi", true);
defineSymbol(math, main, textord, "\u03A8", "\\Psi", true);
defineSymbol(math, main, textord, "\u03A9", "\\Omega", true);
defineSymbol(math, main, textord, "A", "\u0391");
defineSymbol(math, main, textord, "B", "\u0392");
defineSymbol(math, main, textord, "E", "\u0395");
defineSymbol(math, main, textord, "Z", "\u0396");
defineSymbol(math, main, textord, "H", "\u0397");
defineSymbol(math, main, textord, "I", "\u0399");
defineSymbol(math, main, textord, "K", "\u039A");
defineSymbol(math, main, textord, "M", "\u039C");
defineSymbol(math, main, textord, "N", "\u039D");
defineSymbol(math, main, textord, "O", "\u039F");
defineSymbol(math, main, textord, "P", "\u03A1");
defineSymbol(math, main, textord, "T", "\u03A4");
defineSymbol(math, main, textord, "X", "\u03A7");
defineSymbol(math, main, textord, "\xAC", "\\neg", true);
defineSymbol(math, main, textord, "\xAC", "\\lnot");
defineSymbol(math, main, textord, "\u22A4", "\\top");
defineSymbol(math, main, textord, "\u22A5", "\\bot");
defineSymbol(math, main, textord, "\u2205", "\\emptyset");
defineSymbol(math, ams, textord, "\u2205", "\\varnothing");
defineSymbol(math, main, mathord, "\u03B1", "\\alpha", true);
defineSymbol(math, main, mathord, "\u03B2", "\\beta", true);
defineSymbol(math, main, mathord, "\u03B3", "\\gamma", true);
defineSymbol(math, main, mathord, "\u03B4", "\\delta", true);
defineSymbol(math, main, mathord, "\u03F5", "\\epsilon", true);
defineSymbol(math, main, mathord, "\u03B6", "\\zeta", true);
defineSymbol(math, main, mathord, "\u03B7", "\\eta", true);
defineSymbol(math, main, mathord, "\u03B8", "\\theta", true);
defineSymbol(math, main, mathord, "\u03B9", "\\iota", true);
defineSymbol(math, main, mathord, "\u03BA", "\\kappa", true);
defineSymbol(math, main, mathord, "\u03BB", "\\lambda", true);
defineSymbol(math, main, mathord, "\u03BC", "\\mu", true);
defineSymbol(math, main, mathord, "\u03BD", "\\nu", true);
defineSymbol(math, main, mathord, "\u03BE", "\\xi", true);
defineSymbol(math, main, mathord, "\u03BF", "\\omicron", true);
defineSymbol(math, main, mathord, "\u03C0", "\\pi", true);
defineSymbol(math, main, mathord, "\u03C1", "\\rho", true);
defineSymbol(math, main, mathord, "\u03C3", "\\sigma", true);
defineSymbol(math, main, mathord, "\u03C4", "\\tau", true);
defineSymbol(math, main, mathord, "\u03C5", "\\upsilon", true);
defineSymbol(math, main, mathord, "\u03D5", "\\phi", true);
defineSymbol(math, main, mathord, "\u03C7", "\\chi", true);
defineSymbol(math, main, mathord, "\u03C8", "\\psi", true);
defineSymbol(math, main, mathord, "\u03C9", "\\omega", true);
defineSymbol(math, main, mathord, "\u03B5", "\\varepsilon", true);
defineSymbol(math, main, mathord, "\u03D1", "\\vartheta", true);
defineSymbol(math, main, mathord, "\u03D6", "\\varpi", true);
defineSymbol(math, main, mathord, "\u03F1", "\\varrho", true);
defineSymbol(math, main, mathord, "\u03C2", "\\varsigma", true);
defineSymbol(math, main, mathord, "\u03C6", "\\varphi", true);
defineSymbol(math, main, bin, "\u2217", "*", true);
defineSymbol(math, main, bin, "+", "+");
defineSymbol(math, main, bin, "\u2212", "-", true);
defineSymbol(math, main, bin, "\u22C5", "\\cdot", true);
defineSymbol(math, main, bin, "\u2218", "\\circ");
defineSymbol(math, main, bin, "\xF7", "\\div", true);
defineSymbol(math, main, bin, "\xB1", "\\pm", true);
defineSymbol(math, main, bin, "\xD7", "\\times", true);
defineSymbol(math, main, bin, "\u2229", "\\cap", true);
defineSymbol(math, main, bin, "\u222A", "\\cup", true);
defineSymbol(math, main, bin, "\u2216", "\\setminus");
defineSymbol(math, main, bin, "\u2227", "\\land");
defineSymbol(math, main, bin, "\u2228", "\\lor");
defineSymbol(math, main, bin, "\u2227", "\\wedge", true);
defineSymbol(math, main, bin, "\u2228", "\\vee", true);
defineSymbol(math, main, textord, "\u221A", "\\surd");
defineSymbol(math, main, symbols_open, "\u27E8", "\\langle", true);
defineSymbol(math, main, symbols_open, "\u2223", "\\lvert");
defineSymbol(math, main, symbols_open, "\u2225", "\\lVert");
defineSymbol(math, main, symbols_close, "?", "?");
defineSymbol(math, main, symbols_close, "!", "!");
defineSymbol(math, main, symbols_close, "\u27E9", "\\rangle", true);
defineSymbol(math, main, symbols_close, "\u2223", "\\rvert");
defineSymbol(math, main, symbols_close, "\u2225", "\\rVert");
defineSymbol(math, main, rel, "=", "=");
defineSymbol(math, main, rel, ":", ":");
defineSymbol(math, main, rel, "\u2248", "\\approx", true);
defineSymbol(math, main, rel, "\u2245", "\\cong", true);
defineSymbol(math, main, rel, "\u2265", "\\ge");
defineSymbol(math, main, rel, "\u2265", "\\geq", true);
defineSymbol(math, main, rel, "\u2190", "\\gets");
defineSymbol(math, main, rel, ">", "\\gt", true);
defineSymbol(math, main, rel, "\u2208", "\\in", true);
defineSymbol(math, main, rel, "\uE020", "\\@not");
defineSymbol(math, main, rel, "\u2282", "\\subset", true);
defineSymbol(math, main, rel, "\u2283", "\\supset", true);
defineSymbol(math, main, rel, "\u2286", "\\subseteq", true);
defineSymbol(math, main, rel, "\u2287", "\\supseteq", true);
defineSymbol(math, ams, rel, "\u2288", "\\nsubseteq", true);
defineSymbol(math, ams, rel, "\u2289", "\\nsupseteq", true);
defineSymbol(math, main, rel, "\u22A8", "\\models");
defineSymbol(math, main, rel, "\u2190", "\\leftarrow", true);
defineSymbol(math, main, rel, "\u2264", "\\le");
defineSymbol(math, main, rel, "\u2264", "\\leq", true);
defineSymbol(math, main, rel, "<", "\\lt", true);
defineSymbol(math, main, rel, "\u2192", "\\rightarrow", true);
defineSymbol(math, main, rel, "\u2192", "\\to");
defineSymbol(math, ams, rel, "\u2271", "\\ngeq", true);
defineSymbol(math, ams, rel, "\u2270", "\\nleq", true);
defineSymbol(math, main, spacing, "\xA0", "\\ ");
defineSymbol(math, main, spacing, "\xA0", "\\space"); // Ref: LaTeX Source 2e: \DeclareRobustCommand{\nobreakspace}{%

defineSymbol(math, main, spacing, "\xA0", "\\nobreakspace");
defineSymbol(symbols_text, main, spacing, "\xA0", "\\ ");
defineSymbol(symbols_text, main, spacing, "\xA0", " ");
defineSymbol(symbols_text, main, spacing, "\xA0", "\\space");
defineSymbol(symbols_text, main, spacing, "\xA0", "\\nobreakspace");
defineSymbol(math, main, spacing, null, "\\nobreak");
defineSymbol(math, main, spacing, null, "\\allowbreak");
defineSymbol(math, main, punct, ",", ",");
defineSymbol(math, main, punct, ";", ";");
defineSymbol(math, ams, bin, "\u22BC", "\\barwedge", true);
defineSymbol(math, ams, bin, "\u22BB", "\\veebar", true);
defineSymbol(math, main, bin, "\u2299", "\\odot", true);
defineSymbol(math, main, bin, "\u2295", "\\oplus", true);
defineSymbol(math, main, bin, "\u2297", "\\otimes", true);
defineSymbol(math, main, textord, "\u2202", "\\partial", true);
defineSymbol(math, main, bin, "\u2298", "\\oslash", true);
defineSymbol(math, ams, bin, "\u229A", "\\circledcirc", true);
defineSymbol(math, ams, bin, "\u22A1", "\\boxdot", true);
defineSymbol(math, main, bin, "\u25B3", "\\bigtriangleup");
defineSymbol(math, main, bin, "\u25BD", "\\bigtriangledown");
defineSymbol(math, main, bin, "\u2020", "\\dagger");
defineSymbol(math, main, bin, "\u22C4", "\\diamond");
defineSymbol(math, main, bin, "\u22C6", "\\star");
defineSymbol(math, main, bin, "\u25C3", "\\triangleleft");
defineSymbol(math, main, bin, "\u25B9", "\\triangleright");
defineSymbol(math, main, symbols_open, "{", "\\{");
defineSymbol(symbols_text, main, textord, "{", "\\{");
defineSymbol(symbols_text, main, textord, "{", "\\textbraceleft");
defineSymbol(math, main, symbols_close, "}", "\\}");
defineSymbol(symbols_text, main, textord, "}", "\\}");
defineSymbol(symbols_text, main, textord, "}", "\\textbraceright");
defineSymbol(math, main, symbols_open, "{", "\\lbrace");
defineSymbol(math, main, symbols_close, "}", "\\rbrace");
defineSymbol(math, main, symbols_open, "[", "\\lbrack", true);
defineSymbol(symbols_text, main, textord, "[", "\\lbrack", true);
defineSymbol(math, main, symbols_close, "]", "\\rbrack", true);
defineSymbol(symbols_text, main, textord, "]", "\\rbrack", true);
defineSymbol(math, main, symbols_open, "(", "\\lparen", true);
defineSymbol(math, main, symbols_close, ")", "\\rparen", true);
defineSymbol(symbols_text, main, textord, "<", "\\textless", true); // in T1 fontenc

defineSymbol(symbols_text, main, textord, ">", "\\textgreater", true); // in T1 fontenc

defineSymbol(math, main, symbols_open, "\u230A", "\\lfloor", true);
defineSymbol(math, main, symbols_close, "\u230B", "\\rfloor", true);
defineSymbol(math, main, symbols_open, "\u2308", "\\lceil", true);
defineSymbol(math, main, symbols_close, "\u2309", "\\rceil", true);
defineSymbol(math, main, textord, "\\", "\\backslash");
defineSymbol(math, main, textord, "\u2223", "|");
defineSymbol(math, main, textord, "\u2223", "\\vert");
defineSymbol(symbols_text, main, textord, "|", "\\textbar", true); // in T1 fontenc

defineSymbol(math, main, textord, "\u2225", "\\|");
defineSymbol(math, main, textord, "\u2225", "\\Vert");
defineSymbol(symbols_text, main, textord, "\u2225", "\\textbardbl");
defineSymbol(symbols_text, main, textord, "~", "\\textasciitilde");
defineSymbol(symbols_text, main, textord, "\\", "\\textbackslash");
defineSymbol(symbols_text, main, textord, "^", "\\textasciicircum");
defineSymbol(math, main, rel, "\u2191", "\\uparrow", true);
defineSymbol(math, main, rel, "\u21D1", "\\Uparrow", true);
defineSymbol(math, main, rel, "\u2193", "\\downarrow", true);
defineSymbol(math, main, rel, "\u21D3", "\\Downarrow", true);
defineSymbol(math, main, rel, "\u2195", "\\updownarrow", true);
defineSymbol(math, main, rel, "\u21D5", "\\Updownarrow", true);
defineSymbol(math, main, op, "\u2210", "\\coprod");
defineSymbol(math, main, op, "\u22C1", "\\bigvee");
defineSymbol(math, main, op, "\u22C0", "\\bigwedge");
defineSymbol(math, main, op, "\u2A04", "\\biguplus");
defineSymbol(math, main, op, "\u22C2", "\\bigcap");
defineSymbol(math, main, op, "\u22C3", "\\bigcup");
defineSymbol(math, main, op, "\u222B", "\\int");
defineSymbol(math, main, op, "\u222B", "\\intop");
defineSymbol(math, main, op, "\u222C", "\\iint");
defineSymbol(math, main, op, "\u222D", "\\iiint");
defineSymbol(math, main, op, "\u220F", "\\prod");
defineSymbol(math, main, op, "\u2211", "\\sum");
defineSymbol(math, main, op, "\u2A02", "\\bigotimes");
defineSymbol(math, main, op, "\u2A01", "\\bigoplus");
defineSymbol(math, main, op, "\u2A00", "\\bigodot");
defineSymbol(math, main, op, "\u222E", "\\oint");
defineSymbol(math, main, op, "\u222F", "\\oiint");
defineSymbol(math, main, op, "\u2230", "\\oiiint");
defineSymbol(math, main, op, "\u2A06", "\\bigsqcup");
defineSymbol(math, main, op, "\u222B", "\\smallint");
defineSymbol(symbols_text, main, inner, "\u2026", "\\textellipsis");
defineSymbol(math, main, inner, "\u2026", "\\mathellipsis");
defineSymbol(symbols_text, main, inner, "\u2026", "\\ldots", true);
defineSymbol(math, main, inner, "\u2026", "\\ldots", true);
defineSymbol(math, main, inner, "\u22EF", "\\@cdots", true);
defineSymbol(math, main, inner, "\u22F1", "\\ddots", true);
defineSymbol(math, main, textord, "\u22EE", "\\varvdots"); // \vdots is a macro

defineSymbol(math, main, accent, "\u02CA", "\\acute");
defineSymbol(math, main, accent, "\u02CB", "\\grave");
defineSymbol(math, main, accent, "\xA8", "\\ddot");
defineSymbol(math, main, accent, "~", "\\tilde");
defineSymbol(math, main, accent, "\u02C9", "\\bar");
defineSymbol(math, main, accent, "\u02D8", "\\breve");
defineSymbol(math, main, accent, "\u02C7", "\\check");
defineSymbol(math, main, accent, "^", "\\hat");
defineSymbol(math, main, accent, "\u20D7", "\\vec");
defineSymbol(math, main, accent, "\u02D9", "\\dot");
defineSymbol(math, main, accent, "\u02DA", "\\mathring"); // \imath and \jmath should be invariant to \mathrm, \mathbf, etc., so use PUA

defineSymbol(math, main, mathord, "\uE131", "\\@imath");
defineSymbol(math, main, mathord, "\uE237", "\\@jmath");
defineSymbol(math, main, textord, "\u0131", "\u0131");
defineSymbol(math, main, textord, "\u0237", "\u0237");
defineSymbol(symbols_text, main, textord, "\u0131", "\\i", true);
defineSymbol(symbols_text, main, textord, "\u0237", "\\j", true);
defineSymbol(symbols_text, main, textord, "\xDF", "\\ss", true);
defineSymbol(symbols_text, main, textord, "\xE6", "\\ae", true);
defineSymbol(symbols_text, main, textord, "\u0153", "\\oe", true);
defineSymbol(symbols_text, main, textord, "\xF8", "\\o", true);
defineSymbol(symbols_text, main, textord, "\xC6", "\\AE", true);
defineSymbol(symbols_text, main, textord, "\u0152", "\\OE", true);
defineSymbol(symbols_text, main, textord, "\xD8", "\\O", true);
defineSymbol(symbols_text, main, accent, "\u02CA", "\\'"); // acute

defineSymbol(symbols_text, main, accent, "\u02CB", "\\`"); // grave

defineSymbol(symbols_text, main, accent, "\u02C6", "\\^"); // circumflex

defineSymbol(symbols_text, main, accent, "\u02DC", "\\~"); // tilde

defineSymbol(symbols_text, main, accent, "\u02C9", "\\="); // macron

defineSymbol(symbols_text, main, accent, "\u02D8", "\\u"); // breve

defineSymbol(symbols_text, main, accent, "\u02D9", "\\."); // dot above

defineSymbol(symbols_text, main, accent, "\xB8", "\\c"); // cedilla

defineSymbol(symbols_text, main, accent, "\u02DA", "\\r"); // ring above

defineSymbol(symbols_text, main, accent, "\u02C7", "\\v"); // caron

defineSymbol(symbols_text, main, accent, "\xA8", '\\"'); // diaresis

defineSymbol(symbols_text, main, accent, "\u02DD", "\\H"); // double acute

defineSymbol(symbols_text, main, accent, "\u25EF", "\\textcircled"); // \bigcirc glyph
// These ligatures are detected and created in Parser.js's `formLigatures`.

var ligatures = {
  "--": true,
  "---": true,
  "``": true,
  "''": true
};
defineSymbol(symbols_text, main, textord, "\u2013", "--", true);
defineSymbol(symbols_text, main, textord, "\u2013", "\\textendash");
defineSymbol(symbols_text, main, textord, "\u2014", "---", true);
defineSymbol(symbols_text, main, textord, "\u2014", "\\textemdash");
defineSymbol(symbols_text, main, textord, "\u2018", "`", true);
defineSymbol(symbols_text, main, textord, "\u2018", "\\textquoteleft");
defineSymbol(symbols_text, main, textord, "\u2019", "'", true);
defineSymbol(symbols_text, main, textord, "\u2019", "\\textquoteright");
defineSymbol(symbols_text, main, textord, "\u201C", "``", true);
defineSymbol(symbols_text, main, textord, "\u201C", "\\textquotedblleft");
defineSymbol(symbols_text, main, textord, "\u201D", "''", true);
defineSymbol(symbols_text, main, textord, "\u201D", "\\textquotedblright"); //  \degree from gensymb package

defineSymbol(math, main, textord, "\xB0", "\\degree", true);
defineSymbol(symbols_text, main, textord, "\xB0", "\\degree"); // \textdegree from inputenc package

defineSymbol(symbols_text, main, textord, "\xB0", "\\textdegree", true); // TODO: In LaTeX, \pounds can generate a different character in text and math
// mode, but among our fonts, only Main-Regular defines this character "163".

defineSymbol(math, main, textord, "\xA3", "\\pounds");
defineSymbol(math, main, textord, "\xA3", "\\mathsterling", true);
defineSymbol(symbols_text, main, textord, "\xA3", "\\pounds");
defineSymbol(symbols_text, main, textord, "\xA3", "\\textsterling", true);
defineSymbol(math, ams, textord, "\u2720", "\\maltese");
defineSymbol(symbols_text, ams, textord, "\u2720", "\\maltese"); // There are lots of symbols which are the same, so we add them in afterwards.
// All of these are textords in math mode

var mathTextSymbols = "0123456789/@.\"";

for (var i = 0; i < mathTextSymbols.length; i++) {
  var ch = mathTextSymbols.charAt(i);
  defineSymbol(math, main, textord, ch, ch);
} // All of these are textords in text mode


var textSymbols = "0123456789!@*()-=+\";:?/.,";

for (var _i = 0; _i < textSymbols.length; _i++) {
  var _ch = textSymbols.charAt(_i);

  defineSymbol(symbols_text, main, textord, _ch, _ch);
} // All of these are textords in text mode, and mathords in math mode


var letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

for (var _i2 = 0; _i2 < letters.length; _i2++) {
  var _ch2 = letters.charAt(_i2);

  defineSymbol(math, main, mathord, _ch2, _ch2);
  defineSymbol(symbols_text, main, textord, _ch2, _ch2);
} // Blackboard bold and script letters in Unicode range


defineSymbol(math, ams, textord, "C", "\u2102"); // blackboard bold

defineSymbol(symbols_text, ams, textord, "C", "\u2102");
defineSymbol(math, ams, textord, "H", "\u210D");
defineSymbol(symbols_text, ams, textord, "H", "\u210D");
defineSymbol(math, ams, textord, "N", "\u2115");
defineSymbol(symbols_text, ams, textord, "N", "\u2115");
defineSymbol(math, ams, textord, "P", "\u2119");
defineSymbol(symbols_text, ams, textord, "P", "\u2119");
defineSymbol(math, ams, textord, "Q", "\u211A");
defineSymbol(symbols_text, ams, textord, "Q", "\u211A");
defineSymbol(math, ams, textord, "R", "\u211D");
defineSymbol(symbols_text, ams, textord, "R", "\u211D");
defineSymbol(math, ams, textord, "Z", "\u2124");
defineSymbol(symbols_text, ams, textord, "Z", "\u2124");
defineSymbol(math, main, mathord, "h", "\u210E"); // italic h, Planck constant

defineSymbol(symbols_text, main, mathord, "h", "\u210E"); // The next loop loads wide (surrogate pair) characters.
// We support some letters in the Unicode range U+1D400 to U+1D7FF,
// Mathematical Alphanumeric Symbols.
// Some editors do not deal well with wide characters. So don't write the
// string into this file. Instead, create the string from the surrogate pair.

var wideChar = "";

for (var _i3 = 0; _i3 < letters.length; _i3++) {
  var _ch3 = letters.charAt(_i3); // The hex numbers in the next line are a surrogate pair.
  // 0xD835 is the high surrogate for all letters in the range we support.
  // 0xDC00 is the low surrogate for bold A.


  wideChar = String.fromCharCode(0xD835, 0xDC00 + _i3); // A-Z a-z bold

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDC34 + _i3); // A-Z a-z italic

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDC68 + _i3); // A-Z a-z bold italic

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDD04 + _i3); // A-Z a-z Fractur

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDDA0 + _i3); // A-Z a-z sans-serif

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDDD4 + _i3); // A-Z a-z sans bold

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDE08 + _i3); // A-Z a-z sans italic

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDE70 + _i3); // A-Z a-z monospace

  defineSymbol(math, main, mathord, _ch3, wideChar);
  defineSymbol(symbols_text, main, textord, _ch3, wideChar);

  if (_i3 < 26) {
    // KaTeX fonts have only capital letters for blackboard bold and script.
    // See exception for k below.
    wideChar = String.fromCharCode(0xD835, 0xDD38 + _i3); // A-Z double struck

    defineSymbol(math, main, mathord, _ch3, wideChar);
    defineSymbol(symbols_text, main, textord, _ch3, wideChar);
    wideChar = String.fromCharCode(0xD835, 0xDC9C + _i3); // A-Z script

    defineSymbol(math, main, mathord, _ch3, wideChar);
    defineSymbol(symbols_text, main, textord, _ch3, wideChar);
  } // TODO: Add bold script when it is supported by a KaTeX font.

} // "k" is the only double struck lower case letter in the KaTeX fonts.


wideChar = String.fromCharCode(0xD835, 0xDD5C); // k double struck

defineSymbol(math, main, mathord, "k", wideChar);
defineSymbol(symbols_text, main, textord, "k", wideChar); // Next, some wide character numerals

for (var _i4 = 0; _i4 < 10; _i4++) {
  var _ch4 = _i4.toString();

  wideChar = String.fromCharCode(0xD835, 0xDFCE + _i4); // 0-9 bold

  defineSymbol(math, main, mathord, _ch4, wideChar);
  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDFE2 + _i4); // 0-9 sans serif

  defineSymbol(math, main, mathord, _ch4, wideChar);
  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDFEC + _i4); // 0-9 bold sans

  defineSymbol(math, main, mathord, _ch4, wideChar);
  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
  wideChar = String.fromCharCode(0xD835, 0xDFF6 + _i4); // 0-9 monospace

  defineSymbol(math, main, mathord, _ch4, wideChar);
  defineSymbol(symbols_text, main, textord, _ch4, wideChar);
} // We add these Latin-1 letters as symbols for backwards-compatibility,
// but they are not actually in the font, nor are they supported by the
// Unicode accent mechanism, so they fall back to Times font and look ugly.
// TODO(edemaine): Fix this.


var extraLatin = "\xD0\xDE\xFE";

for (var _i5 = 0; _i5 < extraLatin.length; _i5++) {
  var _ch5 = extraLatin.charAt(_i5);

  defineSymbol(math, main, mathord, _ch5, _ch5);
  defineSymbol(symbols_text, main, textord, _ch5, _ch5);
}
/**
 * This file provides support for Unicode range U+1D400 to U+1D7FF,
 * Mathematical Alphanumeric Symbols.
 *
 * Function wideCharacterFont takes a wide character as input and returns
 * the font information necessary to render it properly.
 */

/**
 * Data below is from https://www.unicode.org/charts/PDF/U1D400.pdf
 * That document sorts characters into groups by font type, say bold or italic.
 *
 * In the arrays below, each subarray consists three elements:
 *      * The CSS class of that group when in math mode.
 *      * The CSS class of that group when in text mode.
 *      * The font name, so that KaTeX can get font metrics.
 */

var wideLatinLetterData = [["mathbf", "textbf", "Main-Bold"], // A-Z bold upright
["mathbf", "textbf", "Main-Bold"], // a-z bold upright
["mathnormal", "textit", "Math-Italic"], // A-Z italic
["mathnormal", "textit", "Math-Italic"], // a-z italic
["boldsymbol", "boldsymbol", "Main-BoldItalic"], // A-Z bold italic
["boldsymbol", "boldsymbol", "Main-BoldItalic"], // a-z bold italic
// Map fancy A-Z letters to script, not calligraphic.
// This aligns with unicode-math and math fonts (except Cambria Math).
["mathscr", "textscr", "Script-Regular"], // A-Z script
["", "", ""], // a-z script.  No font
["", "", ""], // A-Z bold script. No font
["", "", ""], // a-z bold script. No font
["mathfrak", "textfrak", "Fraktur-Regular"], // A-Z Fraktur
["mathfrak", "textfrak", "Fraktur-Regular"], // a-z Fraktur
["mathbb", "textbb", "AMS-Regular"], // A-Z double-struck
["mathbb", "textbb", "AMS-Regular"], // k double-struck
["", "", ""], // A-Z bold Fraktur No font metrics
["", "", ""], // a-z bold Fraktur.   No font.
["mathsf", "textsf", "SansSerif-Regular"], // A-Z sans-serif
["mathsf", "textsf", "SansSerif-Regular"], // a-z sans-serif
["mathboldsf", "textboldsf", "SansSerif-Bold"], // A-Z bold sans-serif
["mathboldsf", "textboldsf", "SansSerif-Bold"], // a-z bold sans-serif
["mathitsf", "textitsf", "SansSerif-Italic"], // A-Z italic sans-serif
["mathitsf", "textitsf", "SansSerif-Italic"], // a-z italic sans-serif
["", "", ""], // A-Z bold italic sans. No font
["", "", ""], // a-z bold italic sans. No font
["mathtt", "texttt", "Typewriter-Regular"], // A-Z monospace
["mathtt", "texttt", "Typewriter-Regular"] // a-z monospace
];
var wideNumeralData = [["mathbf", "textbf", "Main-Bold"], // 0-9 bold
["", "", ""], // 0-9 double-struck. No KaTeX font.
["mathsf", "textsf", "SansSerif-Regular"], // 0-9 sans-serif
["mathboldsf", "textboldsf", "SansSerif-Bold"], // 0-9 bold sans-serif
["mathtt", "texttt", "Typewriter-Regular"] // 0-9 monospace
];
var wideCharacterFont = function wideCharacterFont(wideChar, mode) {
  // IE doesn't support codePointAt(). So work with the surrogate pair.
  var H = wideChar.charCodeAt(0); // high surrogate

  var L = wideChar.charCodeAt(1); // low surrogate

  var codePoint = (H - 0xD800) * 0x400 + (L - 0xDC00) + 0x10000;
  var j = mode === "math" ? 0 : 1; // column index for CSS class.

  if (0x1D400 <= codePoint && codePoint < 0x1D6A4) {
    // wideLatinLetterData contains exactly 26 chars on each row.
    // So we can calculate the relevant row. No traverse necessary.
    var i = Math.floor((codePoint - 0x1D400) / 26);
    return [wideLatinLetterData[i][2], wideLatinLetterData[i][j]];
  } else if (0x1D7CE <= codePoint && codePoint <= 0x1D7FF) {
    // Numerals, ten per row.
    var _i = Math.floor((codePoint - 0x1D7CE) / 10);

    return [wideNumeralData[_i][2], wideNumeralData[_i][j]];
  } else if (codePoint === 0x1D6A5 || codePoint === 0x1D6A6) {
    // dotless i or j
    return [wideLatinLetterData[0][2], wideLatinLetterData[0][j]];
  } else if (0x1D6A6 < codePoint && codePoint < 0x1D7CE) {
    // Greek letters. Not supported, yet.
    return ["", ""];
  } else {
    // We don't support any wide characters outside 1D400–1D7FF.
    throw new src_ParseError("Unsupported character: " + wideChar);
  }
};
/* eslint no-console:0 */

/**
 * This module contains general functions that can be used for building
 * different kinds of domTree nodes in a consistent manner.
 */







/**
 * Looks up the given symbol in fontMetrics, after applying any symbol
 * replacements defined in symbol.js
 */
var lookupSymbol = function lookupSymbol(value, // TODO(#963): Use a union type for this.
fontName, mode) {
  // Replace the value with its replaced value from symbol.js
  if (src_symbols[mode][value] && src_symbols[mode][value].replace) {
    value = src_symbols[mode][value].replace;
  }

  return {
    value: value,
    metrics: getCharacterMetrics(value, fontName, mode)
  };
};
/**
 * Makes a symbolNode after translation via the list of symbols in symbols.js.
 * Correctly pulls out metrics for the character, and optionally takes a list of
 * classes to be attached to the node.
 *
 * TODO: make argument order closer to makeSpan
 * TODO: add a separate argument for math class (e.g. `mop`, `mbin`), which
 * should if present come first in `classes`.
 * TODO(#953): Make `options` mandatory and always pass it in.
 */


var makeSymbol = function makeSymbol(value, fontName, mode, options, classes) {
  var lookup = lookupSymbol(value, fontName, mode);
  var metrics = lookup.metrics;
  value = lookup.value;
  var symbolNode;

  if (metrics) {
    var italic = metrics.italic;

    if (mode === "text" || options && options.font === "mathit") {
      italic = 0;
    }

    symbolNode = new SymbolNode(value, metrics.height, metrics.depth, italic, metrics.skew, metrics.width, classes);
  } else {
    // TODO(emily): Figure out a good way to only print this in development
    typeof console !== "undefined" && console.warn("No character metrics " + ("for '" + value + "' in style '" + fontName + "' and mode '" + mode + "'"));
    symbolNode = new SymbolNode(value, 0, 0, 0, 0, 0, classes);
  }

  if (options) {
    symbolNode.maxFontSize = options.sizeMultiplier;

    if (options.style.isTight()) {
      symbolNode.classes.push("mtight");
    }

    var color = options.getColor();

    if (color) {
      symbolNode.style.color = color;
    }
  }

  return symbolNode;
};
/**
 * Makes a symbol in Main-Regular or AMS-Regular.
 * Used for rel, bin, open, close, inner, and punct.
 */


var mathsym = function mathsym(value, mode, options, classes) {
  if (classes === void 0) {
    classes = [];
  }

  // Decide what font to render the symbol in by its entry in the symbols
  // table.
  // Have a special case for when the value = \ because the \ is used as a
  // textord in unsupported command errors but cannot be parsed as a regular
  // text ordinal and is therefore not present as a symbol in the symbols
  // table for text, as well as a special case for boldsymbol because it
  // can be used for bold + and -
  if (options.font === "boldsymbol" && lookupSymbol(value, "Main-Bold", mode).metrics) {
    return makeSymbol(value, "Main-Bold", mode, options, classes.concat(["mathbf"]));
  } else if (value === "\\" || src_symbols[mode][value].font === "main") {
    return makeSymbol(value, "Main-Regular", mode, options, classes);
  } else {
    return makeSymbol(value, "AMS-Regular", mode, options, classes.concat(["amsrm"]));
  }
};
/**
 * Determines which of the two font names (Main-Bold and Math-BoldItalic) and
 * corresponding style tags (mathbf or boldsymbol) to use for font "boldsymbol",
 * depending on the symbol.  Use this function instead of fontMap for font
 * "boldsymbol".
 */


var boldsymbol = function boldsymbol(value, mode, options, classes, type) {
  if (type !== "textord" && lookupSymbol(value, "Math-BoldItalic", mode).metrics) {
    return {
      fontName: "Math-BoldItalic",
      fontClass: "boldsymbol"
    };
  } else {
    // Some glyphs do not exist in Math-BoldItalic so we need to use
    // Main-Bold instead.
    return {
      fontName: "Main-Bold",
      fontClass: "mathbf"
    };
  }
};
/**
 * Makes either a mathord or textord in the correct font and color.
 */


var makeOrd = function makeOrd(group, options, type) {
  var mode = group.mode;
  var text = group.text;
  var classes = ["mord"]; // Math mode or Old font (i.e. \rm)

  var isFont = mode === "math" || mode === "text" && options.font;
  var fontOrFamily = isFont ? options.font : options.fontFamily;

  if (text.charCodeAt(0) === 0xD835) {
    // surrogate pairs get special treatment
    var _wideCharacterFont = wideCharacterFont(text, mode),
        wideFontName = _wideCharacterFont[0],
        wideFontClass = _wideCharacterFont[1];

    return makeSymbol(text, wideFontName, mode, options, classes.concat(wideFontClass));
  } else if (fontOrFamily) {
    var fontName;
    var fontClasses;

    if (fontOrFamily === "boldsymbol") {
      var fontData = boldsymbol(text, mode, options, classes, type);
      fontName = fontData.fontName;
      fontClasses = [fontData.fontClass];
    } else if (isFont) {
      fontName = fontMap[fontOrFamily].fontName;
      fontClasses = [fontOrFamily];
    } else {
      fontName = retrieveTextFontName(fontOrFamily, options.fontWeight, options.fontShape);
      fontClasses = [fontOrFamily, options.fontWeight, options.fontShape];
    }

    if (lookupSymbol(text, fontName, mode).metrics) {
      return makeSymbol(text, fontName, mode, options, classes.concat(fontClasses));
    } else if (ligatures.hasOwnProperty(text) && fontName.substr(0, 10) === "Typewriter") {
      // Deconstruct ligatures in monospace fonts (\texttt, \tt).
      var parts = [];

      for (var i = 0; i < text.length; i++) {
        parts.push(makeSymbol(text[i], fontName, mode, options, classes.concat(fontClasses)));
      }

      return makeFragment(parts);
    }
  } // Makes a symbol in the default font for mathords and textords.


  if (type === "mathord") {
    return makeSymbol(text, "Math-Italic", mode, options, classes.concat(["mathnormal"]));
  } else if (type === "textord") {
    var font = src_symbols[mode][text] && src_symbols[mode][text].font;

    if (font === "ams") {
      var _fontName = retrieveTextFontName("amsrm", options.fontWeight, options.fontShape);

      return makeSymbol(text, _fontName, mode, options, classes.concat("amsrm", options.fontWeight, options.fontShape));
    } else if (font === "main" || !font) {
      var _fontName2 = retrieveTextFontName("textrm", options.fontWeight, options.fontShape);

      return makeSymbol(text, _fontName2, mode, options, classes.concat(options.fontWeight, options.fontShape));
    } else {
      // fonts added by plugins
      var _fontName3 = retrieveTextFontName(font, options.fontWeight, options.fontShape); // We add font name as a css class


      return makeSymbol(text, _fontName3, mode, options, classes.concat(_fontName3, options.fontWeight, options.fontShape));
    }
  } else {
    throw new Error("unexpected type: " + type + " in makeOrd");
  }
};
/**
 * Returns true if subsequent symbolNodes have the same classes, skew, maxFont,
 * and styles.
 */


var canCombine = function canCombine(prev, next) {
  if (createClass(prev.classes) !== createClass(next.classes) || prev.skew !== next.skew || prev.maxFontSize !== next.maxFontSize) {
    return false;
  } // If prev and next both are just "mbin"s or "mord"s we don't combine them
  // so that the proper spacing can be preserved.


  if (prev.classes.length === 1) {
    var cls = prev.classes[0];

    if (cls === "mbin" || cls === "mord") {
      return false;
    }
  }

  for (var style in prev.style) {
    if (prev.style.hasOwnProperty(style) && prev.style[style] !== next.style[style]) {
      return false;
    }
  }

  for (var _style in next.style) {
    if (next.style.hasOwnProperty(_style) && prev.style[_style] !== next.style[_style]) {
      return false;
    }
  }

  return true;
};
/**
 * Combine consecutive domTree.symbolNodes into a single symbolNode.
 * Note: this function mutates the argument.
 */


var tryCombineChars = function tryCombineChars(chars) {
  for (var i = 0; i < chars.length - 1; i++) {
    var prev = chars[i];
    var next = chars[i + 1];

    if (prev instanceof SymbolNode && next instanceof SymbolNode && canCombine(prev, next)) {
      prev.text += next.text;
      prev.height = Math.max(prev.height, next.height);
      prev.depth = Math.max(prev.depth, next.depth); // Use the last character's italic correction since we use
      // it to add padding to the right of the span created from
      // the combined characters.

      prev.italic = next.italic;
      chars.splice(i + 1, 1);
      i--;
    }
  }

  return chars;
};
/**
 * Calculate the height, depth, and maxFontSize of an element based on its
 * children.
 */


var sizeElementFromChildren = function sizeElementFromChildren(elem) {
  var height = 0;
  var depth = 0;
  var maxFontSize = 0;

  for (var i = 0; i < elem.children.length; i++) {
    var child = elem.children[i];

    if (child.height > height) {
      height = child.height;
    }

    if (child.depth > depth) {
      depth = child.depth;
    }

    if (child.maxFontSize > maxFontSize) {
      maxFontSize = child.maxFontSize;
    }
  }

  elem.height = height;
  elem.depth = depth;
  elem.maxFontSize = maxFontSize;
};
/**
 * Makes a span with the given list of classes, list of children, and options.
 *
 * TODO(#953): Ensure that `options` is always provided (currently some call
 * sites don't pass it) and make the type below mandatory.
 * TODO: add a separate argument for math class (e.g. `mop`, `mbin`), which
 * should if present come first in `classes`.
 */


var makeSpan = function makeSpan(classes, children, options, style) {
  var span = new Span(classes, children, options, style);
  sizeElementFromChildren(span);
  return span;
}; // SVG one is simpler -- doesn't require height, depth, max-font setting.
// This is also a separate method for typesafety.


var makeSvgSpan = function makeSvgSpan(classes, children, options, style) {
  return new Span(classes, children, options, style);
};

var makeLineSpan = function makeLineSpan(className, options, thickness) {
  var line = makeSpan([className], [], options);
  line.height = Math.max(thickness || options.fontMetrics().defaultRuleThickness, options.minRuleThickness);
  line.style.borderBottomWidth = makeEm(line.height);
  line.maxFontSize = 1.0;
  return line;
};
/**
 * Makes an anchor with the given href, list of classes, list of children,
 * and options.
 */


var makeAnchor = function makeAnchor(href, classes, children, options) {
  var anchor = new Anchor(href, classes, children, options);
  sizeElementFromChildren(anchor);
  return anchor;
};
/**
 * Makes a document fragment with the given list of children.
 */


var makeFragment = function makeFragment(children) {
  var fragment = new DocumentFragment(children);
  sizeElementFromChildren(fragment);
  return fragment;
};
/**
 * Wraps group in a span if it's a document fragment, allowing to apply classes
 * and styles
 */


var wrapFragment = function wrapFragment(group, options) {
  if (group instanceof DocumentFragment) {
    return makeSpan([], [group], options);
  }

  return group;
}; // These are exact object types to catch typos in the names of the optional fields.


// Computes the updated `children` list and the overall depth.
//
// This helper function for makeVList makes it easier to enforce type safety by
// allowing early exits (returns) in the logic.
var getVListChildrenAndDepth = function getVListChildrenAndDepth(params) {
  if (params.positionType === "individualShift") {
    var oldChildren = params.children;
    var children = [oldChildren[0]]; // Add in kerns to the list of params.children to get each element to be
    // shifted to the correct specified shift

    var _depth = -oldChildren[0].shift - oldChildren[0].elem.depth;

    var currPos = _depth;

    for (var i = 1; i < oldChildren.length; i++) {
      var diff = -oldChildren[i].shift - currPos - oldChildren[i].elem.depth;
      var size = diff - (oldChildren[i - 1].elem.height + oldChildren[i - 1].elem.depth);
      currPos = currPos + diff;
      children.push({
        type: "kern",
        size: size
      });
      children.push(oldChildren[i]);
    }

    return {
      children: children,
      depth: _depth
    };
  }

  var depth;

  if (params.positionType === "top") {
    // We always start at the bottom, so calculate the bottom by adding up
    // all the sizes
    var bottom = params.positionData;

    for (var _i = 0; _i < params.children.length; _i++) {
      var child = params.children[_i];
      bottom -= child.type === "kern" ? child.size : child.elem.height + child.elem.depth;
    }

    depth = bottom;
  } else if (params.positionType === "bottom") {
    depth = -params.positionData;
  } else {
    var firstChild = params.children[0];

    if (firstChild.type !== "elem") {
      throw new Error('First child must have type "elem".');
    }

    if (params.positionType === "shift") {
      depth = -firstChild.elem.depth - params.positionData;
    } else if (params.positionType === "firstBaseline") {
      depth = -firstChild.elem.depth;
    } else {
      throw new Error("Invalid positionType " + params.positionType + ".");
    }
  }

  return {
    children: params.children,
    depth: depth
  };
};
/**
 * Makes a vertical list by stacking elements and kerns on top of each other.
 * Allows for many different ways of specifying the positioning method.
 *
 * See VListParam documentation above.
 */


var makeVList = function makeVList(params, options) {
  var _getVListChildrenAndD = getVListChildrenAndDepth(params),
      children = _getVListChildrenAndD.children,
      depth = _getVListChildrenAndD.depth; // Create a strut that is taller than any list item. The strut is added to
  // each item, where it will determine the item's baseline. Since it has
  // `overflow:hidden`, the strut's top edge will sit on the item's line box's
  // top edge and the strut's bottom edge will sit on the item's baseline,
  // with no additional line-height spacing. This allows the item baseline to
  // be positioned precisely without worrying about font ascent and
  // line-height.


  var pstrutSize = 0;

  for (var i = 0; i < children.length; i++) {
    var child = children[i];

    if (child.type === "elem") {
      var elem = child.elem;
      pstrutSize = Math.max(pstrutSize, elem.maxFontSize, elem.height);
    }
  }

  pstrutSize += 2;
  var pstrut = makeSpan(["pstrut"], []);
  pstrut.style.height = makeEm(pstrutSize); // Create a new list of actual children at the correct offsets

  var realChildren = [];
  var minPos = depth;
  var maxPos = depth;
  var currPos = depth;

  for (var _i2 = 0; _i2 < children.length; _i2++) {
    var _child = children[_i2];

    if (_child.type === "kern") {
      currPos += _child.size;
    } else {
      var _elem = _child.elem;
      var classes = _child.wrapperClasses || [];
      var style = _child.wrapperStyle || {};
      var childWrap = makeSpan(classes, [pstrut, _elem], undefined, style);
      childWrap.style.top = makeEm(-pstrutSize - currPos - _elem.depth);

      if (_child.marginLeft) {
        childWrap.style.marginLeft = _child.marginLeft;
      }

      if (_child.marginRight) {
        childWrap.style.marginRight = _child.marginRight;
      }

      realChildren.push(childWrap);
      currPos += _elem.height + _elem.depth;
    }

    minPos = Math.min(minPos, currPos);
    maxPos = Math.max(maxPos, currPos);
  } // The vlist contents go in a table-cell with `vertical-align:bottom`.
  // This cell's bottom edge will determine the containing table's baseline
  // without overly expanding the containing line-box.


  var vlist = makeSpan(["vlist"], realChildren);
  vlist.style.height = makeEm(maxPos); // A second row is used if necessary to represent the vlist's depth.

  var rows;

  if (minPos < 0) {
    // We will define depth in an empty span with display: table-cell.
    // It should render with the height that we define. But Chrome, in
    // contenteditable mode only, treats that span as if it contains some
    // text content. And that min-height over-rides our desired height.
    // So we put another empty span inside the depth strut span.
    var emptySpan = makeSpan([], []);
    var depthStrut = makeSpan(["vlist"], [emptySpan]);
    depthStrut.style.height = makeEm(-minPos); // Safari wants the first row to have inline content; otherwise it
    // puts the bottom of the *second* row on the baseline.

    var topStrut = makeSpan(["vlist-s"], [new SymbolNode("\u200B")]);
    rows = [makeSpan(["vlist-r"], [vlist, topStrut]), makeSpan(["vlist-r"], [depthStrut])];
  } else {
    rows = [makeSpan(["vlist-r"], [vlist])];
  }

  var vtable = makeSpan(["vlist-t"], rows);

  if (rows.length === 2) {
    vtable.classes.push("vlist-t2");
  }

  vtable.height = maxPos;
  vtable.depth = -minPos;
  return vtable;
}; // Glue is a concept from TeX which is a flexible space between elements in
// either a vertical or horizontal list. In KaTeX, at least for now, it's
// static space between elements in a horizontal layout.


var makeGlue = function makeGlue(measurement, options) {
  // Make an empty span for the space
  var rule = makeSpan(["mspace"], [], options);
  var size = calculateSize(measurement, options);
  rule.style.marginRight = makeEm(size);
  return rule;
}; // Takes font options, and returns the appropriate fontLookup name


var retrieveTextFontName = function retrieveTextFontName(fontFamily, fontWeight, fontShape) {
  var baseFontName = "";

  switch (fontFamily) {
    case "amsrm":
      baseFontName = "AMS";
      break;

    case "textrm":
      baseFontName = "Main";
      break;

    case "textsf":
      baseFontName = "SansSerif";
      break;

    case "texttt":
      baseFontName = "Typewriter";
      break;

    default:
      baseFontName = fontFamily;
    // use fonts added by a plugin
  }

  var fontStylesName;

  if (fontWeight === "textbf" && fontShape === "textit") {
    fontStylesName = "BoldItalic";
  } else if (fontWeight === "textbf") {
    fontStylesName = "Bold";
  } else if (fontWeight === "textit") {
    fontStylesName = "Italic";
  } else {
    fontStylesName = "Regular";
  }

  return baseFontName + "-" + fontStylesName;
};
/**
 * Maps TeX font commands to objects containing:
 * - variant: string used for "mathvariant" attribute in buildMathML.js
 * - fontName: the "style" parameter to fontMetrics.getCharacterMetrics
 */
// A map between tex font commands an MathML mathvariant attribute values


var fontMap = {
  // styles
  "mathbf": {
    variant: "bold",
    fontName: "Main-Bold"
  },
  "mathrm": {
    variant: "normal",
    fontName: "Main-Regular"
  },
  "textit": {
    variant: "italic",
    fontName: "Main-Italic"
  },
  "mathit": {
    variant: "italic",
    fontName: "Main-Italic"
  },
  "mathnormal": {
    variant: "italic",
    fontName: "Math-Italic"
  },
  // "boldsymbol" is missing because they require the use of multiple fonts:
  // Math-BoldItalic and Main-Bold.  This is handled by a special case in
  // makeOrd which ends up calling boldsymbol.
  // families
  "mathbb": {
    variant: "double-struck",
    fontName: "AMS-Regular"
  },
  "mathcal": {
    variant: "script",
    fontName: "Caligraphic-Regular"
  },
  "mathfrak": {
    variant: "fraktur",
    fontName: "Fraktur-Regular"
  },
  "mathscr": {
    variant: "script",
    fontName: "Script-Regular"
  },
  "mathsf": {
    variant: "sans-serif",
    fontName: "SansSerif-Regular"
  },
  "mathtt": {
    variant: "monospace",
    fontName: "Typewriter-Regular"
  }
};
var svgData = {
  //   path, width, height
  vec: ["vec", 0.471, 0.714],
  // values from the font glyph
  oiintSize1: ["oiintSize1", 0.957, 0.499],
  // oval to overlay the integrand
  oiintSize2: ["oiintSize2", 1.472, 0.659],
  oiiintSize1: ["oiiintSize1", 1.304, 0.499],
  oiiintSize2: ["oiiintSize2", 1.98, 0.659]
};

var staticSvg = function staticSvg(value, options) {
  // Create a span with inline SVG for the element.
  var _svgData$value = svgData[value],
      pathName = _svgData$value[0],
      width = _svgData$value[1],
      height = _svgData$value[2];
  var path = new PathNode(pathName);
  var svgNode = new SvgNode([path], {
    "width": makeEm(width),
    "height": makeEm(height),
    // Override CSS rule `.katex svg { width: 100% }`
    "style": "width:" + makeEm(width),
    "viewBox": "0 0 " + 1000 * width + " " + 1000 * height,
    "preserveAspectRatio": "xMinYMin"
  });
  var span = makeSvgSpan(["overlay"], [svgNode], options);
  span.height = height;
  span.style.height = makeEm(height);
  span.style.width = makeEm(width);
  return span;
};

/* harmony default export */ var buildCommon = ({
  fontMap: fontMap,
  makeSymbol: makeSymbol,
  mathsym: mathsym,
  makeSpan: makeSpan,
  makeSvgSpan: makeSvgSpan,
  makeLineSpan: makeLineSpan,
  makeAnchor: makeAnchor,
  makeFragment: makeFragment,
  wrapFragment: wrapFragment,
  makeVList: makeVList,
  makeOrd: makeOrd,
  makeGlue: makeGlue,
  staticSvg: staticSvg,
  svgData: svgData,
  tryCombineChars: tryCombineChars
});
/**
 * Describes spaces between different classes of atoms.
 */
var thinspace = {
  number: 3,
  unit: "mu"
};
var mediumspace = {
  number: 4,
  unit: "mu"
};
var thickspace = {
  number: 5,
  unit: "mu"
}; // Making the type below exact with all optional fields doesn't work due to
// - https://github.com/facebook/flow/issues/4582
// - https://github.com/facebook/flow/issues/5688
// However, since *all* fields are optional, $Shape<> works as suggested in 5688
// above.

// Spacing relationships for display and text styles
var spacings = {
  mord: {
    mop: thinspace,
    mbin: mediumspace,
    mrel: thickspace,
    minner: thinspace
  },
  mop: {
    mord: thinspace,
    mop: thinspace,
    mrel: thickspace,
    minner: thinspace
  },
  mbin: {
    mord: mediumspace,
    mop: mediumspace,
    mopen: mediumspace,
    minner: mediumspace
  },
  mrel: {
    mord: thickspace,
    mop: thickspace,
    mopen: thickspace,
    minner: thickspace
  },
  mopen: {},
  mclose: {
    mop: thinspace,
    mbin: mediumspace,
    mrel: thickspace,
    minner: thinspace
  },
  mpunct: {
    mord: thinspace,
    mop: thinspace,
    mrel: thickspace,
    mopen: thinspace,
    mclose: thinspace,
    mpunct: thinspace,
    minner: thinspace
  },
  minner: {
    mord: thinspace,
    mop: thinspace,
    mbin: mediumspace,
    mrel: thickspace,
    mopen: thinspace,
    mpunct: thinspace,
    minner: thinspace
  }
}; // Spacing relationships for script and scriptscript styles

var tightSpacings = {
  mord: {
    mop: thinspace
  },
  mop: {
    mord: thinspace,
    mop: thinspace
  },
  mbin: {},
  mrel: {},
  mopen: {},
  mclose: {
    mop: thinspace
  },
  mpunct: {},
  minner: {
    mop: thinspace
  }
};
/** Context provided to function handlers for error messages. */
// Note: reverse the order of the return type union will cause a flow error.
// See https://github.com/facebook/flow/issues/3663.
// More general version of `HtmlBuilder` for nodes (e.g. \sum, accent types)
// whose presence impacts super/subscripting. In this case, ParseNode<"supsub">
// delegates its HTML building to the HtmlBuilder corresponding to these nodes.

/**
 * Final function spec for use at parse time.
 * This is almost identical to `FunctionPropSpec`, except it
 * 1. includes the function handler, and
 * 2. requires all arguments except argTypes.
 * It is generated by `defineFunction()` below.
 */

/**
 * All registered functions.
 * `functions.js` just exports this same dictionary again and makes it public.
 * `Parser.js` requires this dictionary.
 */
var _functions = {};
/**
 * All HTML builders. Should be only used in the `define*` and the `build*ML`
 * functions.
 */

var _htmlGroupBuilders = {};
/**
 * All MathML builders. Should be only used in the `define*` and the `build*ML`
 * functions.
 */

var _mathmlGroupBuilders = {};
function defineFunction(_ref) {
  var type = _ref.type,
      names = _ref.names,
      props = _ref.props,
      handler = _ref.handler,
      htmlBuilder = _ref.htmlBuilder,
      mathmlBuilder = _ref.mathmlBuilder;
  // Set default values of functions
  var data = {
    type: type,
    numArgs: props.numArgs,
    argTypes: props.argTypes,
    allowedInArgument: !!props.allowedInArgument,
    allowedInText: !!props.allowedInText,
    allowedInMath: props.allowedInMath === undefined ? true : props.allowedInMath,
    numOptionalArgs: props.numOptionalArgs || 0,
    infix: !!props.infix,
    primitive: !!props.primitive,
    handler: handler
  };

  for (var i = 0; i < names.length; ++i) {
    _functions[names[i]] = data;
  }

  if (type) {
    if (htmlBuilder) {
      _htmlGroupBuilders[type] = htmlBuilder;
    }

    if (mathmlBuilder) {
      _mathmlGroupBuilders[type] = mathmlBuilder;
    }
  }
}
/**
 * Use this to register only the HTML and MathML builders for a function (e.g.
 * if the function's ParseNode is generated in Parser.js rather than via a
 * stand-alone handler provided to `defineFunction`).
 */

function defineFunctionBuilders(_ref2) {
  var type = _ref2.type,
      htmlBuilder = _ref2.htmlBuilder,
      mathmlBuilder = _ref2.mathmlBuilder;
  defineFunction({
    type: type,
    names: [],
    props: {
      numArgs: 0
    },
    handler: function handler() {
      throw new Error('Should never be called.');
    },
    htmlBuilder: htmlBuilder,
    mathmlBuilder: mathmlBuilder
  });
}
var normalizeArgument = function normalizeArgument(arg) {
  return arg.type === "ordgroup" && arg.body.length === 1 ? arg.body[0] : arg;
}; // Since the corresponding buildHTML/buildMathML function expects a
// list of elements, we normalize for different kinds of arguments

var ordargument = function ordargument(arg) {
  return arg.type === "ordgroup" ? arg.body : [arg];
};
/**
 * This file does the main work of building a domTree structure from a parse
 * tree. The entry point is the `buildHTML` function, which takes a parse tree.
 * Then, the buildExpression, buildGroup, and various groupBuilders functions
 * are called, to produce a final HTML tree.
 */









var buildHTML_makeSpan = buildCommon.makeSpan; // Binary atoms (first class `mbin`) change into ordinary atoms (`mord`)
// depending on their surroundings. See TeXbook pg. 442-446, Rules 5 and 6,
// and the text before Rule 19.

var binLeftCanceller = ["leftmost", "mbin", "mopen", "mrel", "mop", "mpunct"];
var binRightCanceller = ["rightmost", "mrel", "mclose", "mpunct"];
var styleMap = {
  "display": src_Style.DISPLAY,
  "text": src_Style.TEXT,
  "script": src_Style.SCRIPT,
  "scriptscript": src_Style.SCRIPTSCRIPT
};
var DomEnum = {
  mord: "mord",
  mop: "mop",
  mbin: "mbin",
  mrel: "mrel",
  mopen: "mopen",
  mclose: "mclose",
  mpunct: "mpunct",
  minner: "minner"
};

/**
 * Take a list of nodes, build them in order, and return a list of the built
 * nodes. documentFragments are flattened into their contents, so the
 * returned list contains no fragments. `isRealGroup` is true if `expression`
 * is a real group (no atoms will be added on either side), as opposed to
 * a partial group (e.g. one created by \color). `surrounding` is an array
 * consisting type of nodes that will be added to the left and right.
 */
var buildExpression = function buildExpression(expression, options, isRealGroup, surrounding) {
  if (surrounding === void 0) {
    surrounding = [null, null];
  }

  // Parse expressions into `groups`.
  var groups = [];

  for (var i = 0; i < expression.length; i++) {
    var output = buildGroup(expression[i], options);

    if (output instanceof DocumentFragment) {
      var children = output.children;
      groups.push.apply(groups, children);
    } else {
      groups.push(output);
    }
  } // Combine consecutive domTree.symbolNodes into a single symbolNode.


  buildCommon.tryCombineChars(groups); // If `expression` is a partial group, let the parent handle spacings
  // to avoid processing groups multiple times.

  if (!isRealGroup) {
    return groups;
  }

  var glueOptions = options;

  if (expression.length === 1) {
    var node = expression[0];

    if (node.type === "sizing") {
      glueOptions = options.havingSize(node.size);
    } else if (node.type === "styling") {
      glueOptions = options.havingStyle(styleMap[node.style]);
    }
  } // Dummy spans for determining spacings between surrounding atoms.
  // If `expression` has no atoms on the left or right, class "leftmost"
  // or "rightmost", respectively, is used to indicate it.


  var dummyPrev = buildHTML_makeSpan([surrounding[0] || "leftmost"], [], options);
  var dummyNext = buildHTML_makeSpan([surrounding[1] || "rightmost"], [], options); // TODO: These code assumes that a node's math class is the first element
  // of its `classes` array. A later cleanup should ensure this, for
  // instance by changing the signature of `makeSpan`.
  // Before determining what spaces to insert, perform bin cancellation.
  // Binary operators change to ordinary symbols in some contexts.

  var isRoot = isRealGroup === "root";
  traverseNonSpaceNodes(groups, function (node, prev) {
    var prevType = prev.classes[0];
    var type = node.classes[0];

    if (prevType === "mbin" && utils.contains(binRightCanceller, type)) {
      prev.classes[0] = "mord";
    } else if (type === "mbin" && utils.contains(binLeftCanceller, prevType)) {
      node.classes[0] = "mord";
    }
  }, {
    node: dummyPrev
  }, dummyNext, isRoot);
  traverseNonSpaceNodes(groups, function (node, prev) {
    var prevType = getTypeOfDomTree(prev);
    var type = getTypeOfDomTree(node); // 'mtight' indicates that the node is script or scriptscript style.

    var space = prevType && type ? node.hasClass("mtight") ? tightSpacings[prevType][type] : spacings[prevType][type] : null;

    if (space) {
      // Insert glue (spacing) after the `prev`.
      return buildCommon.makeGlue(space, glueOptions);
    }
  }, {
    node: dummyPrev
  }, dummyNext, isRoot);
  return groups;
}; // Depth-first traverse non-space `nodes`, calling `callback` with the current and
// previous node as arguments, optionally returning a node to insert after the
// previous node. `prev` is an object with the previous node and `insertAfter`
// function to insert after it. `next` is a node that will be added to the right.
// Used for bin cancellation and inserting spacings.

var traverseNonSpaceNodes = function traverseNonSpaceNodes(nodes, callback, prev, next, isRoot) {
  if (next) {
    // temporarily append the right node, if exists
    nodes.push(next);
  }

  var i = 0;

  for (; i < nodes.length; i++) {
    var node = nodes[i];
    var partialGroup = checkPartialGroup(node);

    if (partialGroup) {
      // Recursive DFS
      // $FlowFixMe: make nodes a $ReadOnlyArray by returning a new array
      traverseNonSpaceNodes(partialGroup.children, callback, prev, null, isRoot);
      continue;
    } // Ignore explicit spaces (e.g., \;, \,) when determining what implicit
    // spacing should go between atoms of different classes


    var nonspace = !node.hasClass("mspace");

    if (nonspace) {
      var result = callback(node, prev.node);

      if (result) {
        if (prev.insertAfter) {
          prev.insertAfter(result);
        } else {
          // insert at front
          nodes.unshift(result);
          i++;
        }
      }
    }

    if (nonspace) {
      prev.node = node;
    } else if (isRoot && node.hasClass("newline")) {
      prev.node = buildHTML_makeSpan(["leftmost"]); // treat like beginning of line
    }

    prev.insertAfter = function (index) {
      return function (n) {
        nodes.splice(index + 1, 0, n);
        i++;
      };
    }(i);
  }

  if (next) {
    nodes.pop();
  }
}; // Check if given node is a partial group, i.e., does not affect spacing around.


var checkPartialGroup = function checkPartialGroup(node) {
  if (node instanceof DocumentFragment || node instanceof Anchor || node instanceof Span && node.hasClass("enclosing")) {
    return node;
  }

  return null;
}; // Return the outermost node of a domTree.


var getOutermostNode = function getOutermostNode(node, side) {
  var partialGroup = checkPartialGroup(node);

  if (partialGroup) {
    var children = partialGroup.children;

    if (children.length) {
      if (side === "right") {
        return getOutermostNode(children[children.length - 1], "right");
      } else if (side === "left") {
        return getOutermostNode(children[0], "left");
      }
    }
  }

  return node;
}; // Return math atom class (mclass) of a domTree.
// If `side` is given, it will get the type of the outermost node at given side.


var getTypeOfDomTree = function getTypeOfDomTree(node, side) {
  if (!node) {
    return null;
  }

  if (side) {
    node = getOutermostNode(node, side);
  } // This makes a lot of assumptions as to where the type of atom
  // appears.  We should do a better job of enforcing this.


  return DomEnum[node.classes[0]] || null;
};
var makeNullDelimiter = function makeNullDelimiter(options, classes) {
  var moreClasses = ["nulldelimiter"].concat(options.baseSizingClasses());
  return buildHTML_makeSpan(classes.concat(moreClasses));
};
/**
 * buildGroup is the function that takes a group and calls the correct groupType
 * function for it. It also handles the interaction of size and style changes
 * between parents and children.
 */

var buildGroup = function buildGroup(group, options, baseOptions) {
  if (!group) {
    return buildHTML_makeSpan();
  }

  if (_htmlGroupBuilders[group.type]) {
    // Call the groupBuilders function
    // $FlowFixMe
    var groupNode = _htmlGroupBuilders[group.type](group, options); // If the size changed between the parent and the current group, account
    // for that size difference.

    if (baseOptions && options.size !== baseOptions.size) {
      groupNode = buildHTML_makeSpan(options.sizingClasses(baseOptions), [groupNode], options);
      var multiplier = options.sizeMultiplier / baseOptions.sizeMultiplier;
      groupNode.height *= multiplier;
      groupNode.depth *= multiplier;
    }

    return groupNode;
  } else {
    throw new src_ParseError("Got group of unknown type: '" + group.type + "'");
  }
};
/**
 * Combine an array of HTML DOM nodes (e.g., the output of `buildExpression`)
 * into an unbreakable HTML node of class .base, with proper struts to
 * guarantee correct vertical extent.  `buildHTML` calls this repeatedly to
 * make up the entire expression as a sequence of unbreakable units.
 */

function buildHTMLUnbreakable(children, options) {
  // Compute height and depth of this chunk.
  var body = buildHTML_makeSpan(["base"], children, options); // Add strut, which ensures that the top of the HTML element falls at
  // the height of the expression, and the bottom of the HTML element
  // falls at the depth of the expression.

  var strut = buildHTML_makeSpan(["strut"]);
  strut.style.height = makeEm(body.height + body.depth);

  if (body.depth) {
    strut.style.verticalAlign = makeEm(-body.depth);
  }

  body.children.unshift(strut);
  return body;
}
/**
 * Take an entire parse tree, and build it into an appropriate set of HTML
 * nodes.
 */


function buildHTML(tree, options) {
  // Strip off outer tag wrapper for processing below.
  var tag = null;

  if (tree.length === 1 && tree[0].type === "tag") {
    tag = tree[0].tag;
    tree = tree[0].body;
  } // Build the expression contained in the tree


  var expression = buildExpression(tree, options, "root");
  var eqnNum;

  if (expression.length === 2 && expression[1].hasClass("tag")) {
    // An environment with automatic equation numbers, e.g. {gather}.
    eqnNum = expression.pop();
  }

  var children = []; // Create one base node for each chunk between potential line breaks.
  // The TeXBook [p.173] says "A formula will be broken only after a
  // relation symbol like $=$ or $<$ or $\rightarrow$, or after a binary
  // operation symbol like $+$ or $-$ or $\times$, where the relation or
  // binary operation is on the ``outer level'' of the formula (i.e., not
  // enclosed in {...} and not part of an \over construction)."

  var parts = [];

  for (var i = 0; i < expression.length; i++) {
    parts.push(expression[i]);

    if (expression[i].hasClass("mbin") || expression[i].hasClass("mrel") || expression[i].hasClass("allowbreak")) {
      // Put any post-operator glue on same line as operator.
      // Watch for \nobreak along the way, and stop at \newline.
      var nobreak = false;

      while (i < expression.length - 1 && expression[i + 1].hasClass("mspace") && !expression[i + 1].hasClass("newline")) {
        i++;
        parts.push(expression[i]);

        if (expression[i].hasClass("nobreak")) {
          nobreak = true;
        }
      } // Don't allow break if \nobreak among the post-operator glue.


      if (!nobreak) {
        children.push(buildHTMLUnbreakable(parts, options));
        parts = [];
      }
    } else if (expression[i].hasClass("newline")) {
      // Write the line except the newline
      parts.pop();

      if (parts.length > 0) {
        children.push(buildHTMLUnbreakable(parts, options));
        parts = [];
      } // Put the newline at the top level


      children.push(expression[i]);
    }
  }

  if (parts.length > 0) {
    children.push(buildHTMLUnbreakable(parts, options));
  } // Now, if there was a tag, build it too and append it as a final child.


  var tagChild;

  if (tag) {
    tagChild = buildHTMLUnbreakable(buildExpression(tag, options, true));
    tagChild.classes = ["tag"];
    children.push(tagChild);
  } else if (eqnNum) {
    children.push(eqnNum);
  }

  var htmlNode = buildHTML_makeSpan(["katex-html"], children);
  htmlNode.setAttribute("aria-hidden", "true"); // Adjust the strut of the tag to be the maximum height of all children
  // (the height of the enclosing htmlNode) for proper vertical alignment.

  if (tagChild) {
    var strut = tagChild.children[0];
    strut.style.height = makeEm(htmlNode.height + htmlNode.depth);

    if (htmlNode.depth) {
      strut.style.verticalAlign = makeEm(-htmlNode.depth);
    }
  }

  return htmlNode;
}
/**
 * These objects store data about MathML nodes. This is the MathML equivalent
 * of the types in domTree.js. Since MathML handles its own rendering, and
 * since we're mainly using MathML to improve accessibility, we don't manage
 * any of the styling state that the plain DOM nodes do.
 *
 * The `toNode` and `toMarkup` functions work simlarly to how they do in
 * domTree.js, creating namespaced DOM nodes and HTML text markup respectively.
 */




function newDocumentFragment(children) {
  return new DocumentFragment(children);
}
/**
 * This node represents a general purpose MathML node of any type. The
 * constructor requires the type of node to create (for example, `"mo"` or
 * `"mspace"`, corresponding to `<mo>` and `<mspace>` tags).
 */

var MathNode = /*#__PURE__*/function () {
  function MathNode(type, children, classes) {
    this.type = void 0;
    this.attributes = void 0;
    this.children = void 0;
    this.classes = void 0;
    this.type = type;
    this.attributes = {};
    this.children = children || [];
    this.classes = classes || [];
  }
  /**
   * Sets an attribute on a MathML node. MathML depends on attributes to convey a
   * semantic content, so this is used heavily.
   */


  var _proto = MathNode.prototype;

  _proto.setAttribute = function setAttribute(name, value) {
    this.attributes[name] = value;
  }
  /**
   * Gets an attribute on a MathML node.
   */
  ;

  _proto.getAttribute = function getAttribute(name) {
    return this.attributes[name];
  }
  /**
   * Converts the math node into a MathML-namespaced DOM element.
   */
  ;

  _proto.toNode = function toNode() {
    var node = document.createElementNS("http://www.w3.org/1998/Math/MathML", this.type);

    for (var attr in this.attributes) {
      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
        node.setAttribute(attr, this.attributes[attr]);
      }
    }

    if (this.classes.length > 0) {
      node.className = createClass(this.classes);
    }

    for (var i = 0; i < this.children.length; i++) {
      node.appendChild(this.children[i].toNode());
    }

    return node;
  }
  /**
   * Converts the math node into an HTML markup string.
   */
  ;

  _proto.toMarkup = function toMarkup() {
    var markup = "<" + this.type; // Add the attributes

    for (var attr in this.attributes) {
      if (Object.prototype.hasOwnProperty.call(this.attributes, attr)) {
        markup += " " + attr + "=\"";
        markup += utils.escape(this.attributes[attr]);
        markup += "\"";
      }
    }

    if (this.classes.length > 0) {
      markup += " class =\"" + utils.escape(createClass(this.classes)) + "\"";
    }

    markup += ">";

    for (var i = 0; i < this.children.length; i++) {
      markup += this.children[i].toMarkup();
    }

    markup += "</" + this.type + ">";
    return markup;
  }
  /**
   * Converts the math node into a string, similar to innerText, but escaped.
   */
  ;

  _proto.toText = function toText() {
    return this.children.map(function (child) {
      return child.toText();
    }).join("");
  };

  return MathNode;
}();
/**
 * This node represents a piece of text.
 */

var TextNode = /*#__PURE__*/function () {
  function TextNode(text) {
    this.text = void 0;
    this.text = text;
  }
  /**
   * Converts the text node into a DOM text node.
   */


  var _proto2 = TextNode.prototype;

  _proto2.toNode = function toNode() {
    return document.createTextNode(this.text);
  }
  /**
   * Converts the text node into escaped HTML markup
   * (representing the text itself).
   */
  ;

  _proto2.toMarkup = function toMarkup() {
    return utils.escape(this.toText());
  }
  /**
   * Converts the text node into a string
   * (representing the text iteself).
   */
  ;

  _proto2.toText = function toText() {
    return this.text;
  };

  return TextNode;
}();
/**
 * This node represents a space, but may render as <mspace.../> or as text,
 * depending on the width.
 */

var SpaceNode = /*#__PURE__*/function () {
  /**
   * Create a Space node with width given in CSS ems.
   */
  function SpaceNode(width) {
    this.width = void 0;
    this.character = void 0;
    this.width = width; // See https://www.w3.org/TR/2000/WD-MathML2-20000328/chapter6.html
    // for a table of space-like characters.  We use Unicode
    // representations instead of &LongNames; as it's not clear how to
    // make the latter via document.createTextNode.

    if (width >= 0.05555 && width <= 0.05556) {
      this.character = "\u200A"; // &VeryThinSpace;
    } else if (width >= 0.1666 && width <= 0.1667) {
      this.character = "\u2009"; // &ThinSpace;
    } else if (width >= 0.2222 && width <= 0.2223) {
      this.character = "\u2005"; // &MediumSpace;
    } else if (width >= 0.2777 && width <= 0.2778) {
      this.character = "\u2005\u200A"; // &ThickSpace;
    } else if (width >= -0.05556 && width <= -0.05555) {
      this.character = "\u200A\u2063"; // &NegativeVeryThinSpace;
    } else if (width >= -0.1667 && width <= -0.1666) {
      this.character = "\u2009\u2063"; // &NegativeThinSpace;
    } else if (width >= -0.2223 && width <= -0.2222) {
      this.character = "\u205F\u2063"; // &NegativeMediumSpace;
    } else if (width >= -0.2778 && width <= -0.2777) {
      this.character = "\u2005\u2063"; // &NegativeThickSpace;
    } else {
      this.character = null;
    }
  }
  /**
   * Converts the math node into a MathML-namespaced DOM element.
   */


  var _proto3 = SpaceNode.prototype;

  _proto3.toNode = function toNode() {
    if (this.character) {
      return document.createTextNode(this.character);
    } else {
      var node = document.createElementNS("http://www.w3.org/1998/Math/MathML", "mspace");
      node.setAttribute("width", makeEm(this.width));
      return node;
    }
  }
  /**
   * Converts the math node into an HTML markup string.
   */
  ;

  _proto3.toMarkup = function toMarkup() {
    if (this.character) {
      return "<mtext>" + this.character + "</mtext>";
    } else {
      return "<mspace width=\"" + makeEm(this.width) + "\"/>";
    }
  }
  /**
   * Converts the math node into a string, similar to innerText.
   */
  ;

  _proto3.toText = function toText() {
    if (this.character) {
      return this.character;
    } else {
      return " ";
    }
  };

  return SpaceNode;
}();

/* harmony default export */ var mathMLTree = ({
  MathNode: MathNode,
  TextNode: TextNode,
  SpaceNode: SpaceNode,
  newDocumentFragment: newDocumentFragment
});
/**
 * This file converts a parse tree into a cooresponding MathML tree. The main
 * entry point is the `buildMathML` function, which takes a parse tree from the
 * parser.
 */









/**
 * Takes a symbol and converts it into a MathML text node after performing
 * optional replacement from symbols.js.
 */
var makeText = function makeText(text, mode, options) {
  if (src_symbols[mode][text] && src_symbols[mode][text].replace && text.charCodeAt(0) !== 0xD835 && !(ligatures.hasOwnProperty(text) && options && (options.fontFamily && options.fontFamily.substr(4, 2) === "tt" || options.font && options.font.substr(4, 2) === "tt"))) {
    text = src_symbols[mode][text].replace;
  }

  return new mathMLTree.TextNode(text);
};
/**
 * Wrap the given array of nodes in an <mrow> node if needed, i.e.,
 * unless the array has length 1.  Always returns a single node.
 */

var makeRow = function makeRow(body) {
  if (body.length === 1) {
    return body[0];
  } else {
    return new mathMLTree.MathNode("mrow", body);
  }
};
/**
 * Returns the math variant as a string or null if none is required.
 */

var getVariant = function getVariant(group, options) {
  // Handle \text... font specifiers as best we can.
  // MathML has a limited list of allowable mathvariant specifiers; see
  // https://www.w3.org/TR/MathML3/chapter3.html#presm.commatt
  if (options.fontFamily === "texttt") {
    return "monospace";
  } else if (options.fontFamily === "textsf") {
    if (options.fontShape === "textit" && options.fontWeight === "textbf") {
      return "sans-serif-bold-italic";
    } else if (options.fontShape === "textit") {
      return "sans-serif-italic";
    } else if (options.fontWeight === "textbf") {
      return "bold-sans-serif";
    } else {
      return "sans-serif";
    }
  } else if (options.fontShape === "textit" && options.fontWeight === "textbf") {
    return "bold-italic";
  } else if (options.fontShape === "textit") {
    return "italic";
  } else if (options.fontWeight === "textbf") {
    return "bold";
  }

  var font = options.font;

  if (!font || font === "mathnormal") {
    return null;
  }

  var mode = group.mode;

  if (font === "mathit") {
    return "italic";
  } else if (font === "boldsymbol") {
    return group.type === "textord" ? "bold" : "bold-italic";
  } else if (font === "mathbf") {
    return "bold";
  } else if (font === "mathbb") {
    return "double-struck";
  } else if (font === "mathfrak") {
    return "fraktur";
  } else if (font === "mathscr" || font === "mathcal") {
    // MathML makes no distinction between script and caligrahpic
    return "script";
  } else if (font === "mathsf") {
    return "sans-serif";
  } else if (font === "mathtt") {
    return "monospace";
  }

  var text = group.text;

  if (utils.contains(["\\imath", "\\jmath"], text)) {
    return null;
  }

  if (src_symbols[mode][text] && src_symbols[mode][text].replace) {
    text = src_symbols[mode][text].replace;
  }

  var fontName = buildCommon.fontMap[font].fontName;

  if (getCharacterMetrics(text, fontName, mode)) {
    return buildCommon.fontMap[font].variant;
  }

  return null;
};
/**
 * Takes a list of nodes, builds them, and returns a list of the generated
 * MathML nodes.  Also combine consecutive <mtext> outputs into a single
 * <mtext> tag.
 */

var buildMathML_buildExpression = function buildExpression(expression, options, isOrdgroup) {
  if (expression.length === 1) {
    var group = buildMathML_buildGroup(expression[0], options);

    if (isOrdgroup && group instanceof MathNode && group.type === "mo") {
      // When TeX writers want to suppress spacing on an operator,
      // they often put the operator by itself inside braces.
      group.setAttribute("lspace", "0em");
      group.setAttribute("rspace", "0em");
    }

    return [group];
  }

  var groups = [];
  var lastGroup;

  for (var i = 0; i < expression.length; i++) {
    var _group = buildMathML_buildGroup(expression[i], options);

    if (_group instanceof MathNode && lastGroup instanceof MathNode) {
      // Concatenate adjacent <mtext>s
      if (_group.type === 'mtext' && lastGroup.type === 'mtext' && _group.getAttribute('mathvariant') === lastGroup.getAttribute('mathvariant')) {
        var _lastGroup$children;

        (_lastGroup$children = lastGroup.children).push.apply(_lastGroup$children, _group.children);

        continue; // Concatenate adjacent <mn>s
      } else if (_group.type === 'mn' && lastGroup.type === 'mn') {
        var _lastGroup$children2;

        (_lastGroup$children2 = lastGroup.children).push.apply(_lastGroup$children2, _group.children);

        continue; // Concatenate <mn>...</mn> followed by <mi>.</mi>
      } else if (_group.type === 'mi' && _group.children.length === 1 && lastGroup.type === 'mn') {
        var child = _group.children[0];

        if (child instanceof TextNode && child.text === '.') {
          var _lastGroup$children3;

          (_lastGroup$children3 = lastGroup.children).push.apply(_lastGroup$children3, _group.children);

          continue;
        }
      } else if (lastGroup.type === 'mi' && lastGroup.children.length === 1) {
        var lastChild = lastGroup.children[0];

        if (lastChild instanceof TextNode && lastChild.text === "\u0338" && (_group.type === 'mo' || _group.type === 'mi' || _group.type === 'mn')) {
          var _child = _group.children[0];

          if (_child instanceof TextNode && _child.text.length > 0) {
            // Overlay with combining character long solidus
            _child.text = _child.text.slice(0, 1) + "\u0338" + _child.text.slice(1);
            groups.pop();
          }
        }
      }
    }

    groups.push(_group);
    lastGroup = _group;
  }

  return groups;
};
/**
 * Equivalent to buildExpression, but wraps the elements in an <mrow>
 * if there's more than one.  Returns a single node instead of an array.
 */

var buildExpressionRow = function buildExpressionRow(expression, options, isOrdgroup) {
  return makeRow(buildMathML_buildExpression(expression, options, isOrdgroup));
};
/**
 * Takes a group from the parser and calls the appropriate groupBuilders function
 * on it to produce a MathML node.
 */

var buildMathML_buildGroup = function buildGroup(group, options) {
  if (!group) {
    return new mathMLTree.MathNode("mrow");
  }

  if (_mathmlGroupBuilders[group.type]) {
    // Call the groupBuilders function
    // $FlowFixMe
    var result = _mathmlGroupBuilders[group.type](group, options); // $FlowFixMe

    return result;
  } else {
    throw new src_ParseError("Got group of unknown type: '" + group.type + "'");
  }
};
/**
 * Takes a full parse tree and settings and builds a MathML representation of
 * it. In particular, we put the elements from building the parse tree into a
 * <semantics> tag so we can also include that TeX source as an annotation.
 *
 * Note that we actually return a domTree element with a `<math>` inside it so
 * we can do appropriate styling.
 */

function buildMathML(tree, texExpression, options, isDisplayMode, forMathmlOnly) {
  var expression = buildMathML_buildExpression(tree, options); // TODO: Make a pass thru the MathML similar to buildHTML.traverseNonSpaceNodes
  // and add spacing nodes. This is necessary only adjacent to math operators
  // like \sin or \lim or to subsup elements that contain math operators.
  // MathML takes care of the other spacing issues.
  // Wrap up the expression in an mrow so it is presented in the semantics
  // tag correctly, unless it's a single <mrow> or <mtable>.

  var wrapper;

  if (expression.length === 1 && expression[0] instanceof MathNode && utils.contains(["mrow", "mtable"], expression[0].type)) {
    wrapper = expression[0];
  } else {
    wrapper = new mathMLTree.MathNode("mrow", expression);
  } // Build a TeX annotation of the source


  var annotation = new mathMLTree.MathNode("annotation", [new mathMLTree.TextNode(texExpression)]);
  annotation.setAttribute("encoding", "application/x-tex");
  var semantics = new mathMLTree.MathNode("semantics", [wrapper, annotation]);
  var math = new mathMLTree.MathNode("math", [semantics]);
  math.setAttribute("xmlns", "http://www.w3.org/1998/Math/MathML");

  if (isDisplayMode) {
    math.setAttribute("display", "block");
  } // You can't style <math> nodes, so we wrap the node in a span.
  // NOTE: The span class is not typed to have <math> nodes as children, and
  // we don't want to make the children type more generic since the children
  // of span are expected to have more fields in `buildHtml` contexts.


  var wrapperClass = forMathmlOnly ? "katex" : "katex-mathml"; // $FlowFixMe

  return buildCommon.makeSpan([wrapperClass], [math]);
}







var optionsFromSettings = function optionsFromSettings(settings) {
  return new src_Options({
    style: settings.displayMode ? src_Style.DISPLAY : src_Style.TEXT,
    maxSize: settings.maxSize,
    minRuleThickness: settings.minRuleThickness
  });
};

var displayWrap = function displayWrap(node, settings) {
  if (settings.displayMode) {
    var classes = ["katex-display"];

    if (settings.leqno) {
      classes.push("leqno");
    }

    if (settings.fleqn) {
      classes.push("fleqn");
    }

    node = buildCommon.makeSpan(classes, [node]);
  }

  return node;
};

var buildTree = function buildTree(tree, expression, settings) {
  var options = optionsFromSettings(settings);
  var katexNode;

  if (settings.output === "mathml") {
    return buildMathML(tree, expression, options, settings.displayMode, true);
  } else if (settings.output === "html") {
    var htmlNode = buildHTML(tree, options);
    katexNode = buildCommon.makeSpan(["katex"], [htmlNode]);
  } else {
    var mathMLNode = buildMathML(tree, expression, options, settings.displayMode, false);

    var _htmlNode = buildHTML(tree, options);

    katexNode = buildCommon.makeSpan(["katex"], [mathMLNode, _htmlNode]);
  }

  return displayWrap(katexNode, settings);
};
var buildHTMLTree = function buildHTMLTree(tree, expression, settings) {
  var options = optionsFromSettings(settings);
  var htmlNode = buildHTML(tree, options);
  var katexNode = buildCommon.makeSpan(["katex"], [htmlNode]);
  return displayWrap(katexNode, settings);
};
/**
 * This file provides support to buildMathML.js and buildHTML.js
 * for stretchy wide elements rendered from SVG files
 * and other CSS trickery.
 */





var stretchyCodePoint = {
  widehat: "^",
  widecheck: "ˇ",
  widetilde: "~",
  utilde: "~",
  overleftarrow: "\u2190",
  underleftarrow: "\u2190",
  xleftarrow: "\u2190",
  overrightarrow: "\u2192",
  underrightarrow: "\u2192",
  xrightarrow: "\u2192",
  underbrace: "\u23DF",
  overbrace: "\u23DE",
  overgroup: "\u23E0",
  undergroup: "\u23E1",
  overleftrightarrow: "\u2194",
  underleftrightarrow: "\u2194",
  xleftrightarrow: "\u2194",
  Overrightarrow: "\u21D2",
  xRightarrow: "\u21D2",
  overleftharpoon: "\u21BC",
  xleftharpoonup: "\u21BC",
  overrightharpoon: "\u21C0",
  xrightharpoonup: "\u21C0",
  xLeftarrow: "\u21D0",
  xLeftrightarrow: "\u21D4",
  xhookleftarrow: "\u21A9",
  xhookrightarrow: "\u21AA",
  xmapsto: "\u21A6",
  xrightharpoondown: "\u21C1",
  xleftharpoondown: "\u21BD",
  xrightleftharpoons: "\u21CC",
  xleftrightharpoons: "\u21CB",
  xtwoheadleftarrow: "\u219E",
  xtwoheadrightarrow: "\u21A0",
  xlongequal: "=",
  xtofrom: "\u21C4",
  xrightleftarrows: "\u21C4",
  xrightequilibrium: "\u21CC",
  // Not a perfect match.
  xleftequilibrium: "\u21CB",
  // None better available.
  "\\cdrightarrow": "\u2192",
  "\\cdleftarrow": "\u2190",
  "\\cdlongequal": "="
};

var mathMLnode = function mathMLnode(label) {
  var node = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode(stretchyCodePoint[label.replace(/^\\/, '')])]);
  node.setAttribute("stretchy", "true");
  return node;
}; // Many of the KaTeX SVG images have been adapted from glyphs in KaTeX fonts.
// Copyright (c) 2009-2010, Design Science, Inc. (<www.mathjax.org>)
// Copyright (c) 2014-2017 Khan Academy (<www.khanacademy.org>)
// Licensed under the SIL Open Font License, Version 1.1.
// See \nhttp://scripts.sil.org/OFL
// Very Long SVGs
//    Many of the KaTeX stretchy wide elements use a long SVG image and an
//    overflow: hidden tactic to achieve a stretchy image while avoiding
//    distortion of arrowheads or brace corners.
//    The SVG typically contains a very long (400 em) arrow.
//    The SVG is in a container span that has overflow: hidden, so the span
//    acts like a window that exposes only part of the  SVG.
//    The SVG always has a longer, thinner aspect ratio than the container span.
//    After the SVG fills 100% of the height of the container span,
//    there is a long arrow shaft left over. That left-over shaft is not shown.
//    Instead, it is sliced off because the span's CSS has overflow: hidden.
//    Thus, the reader sees an arrow that matches the subject matter width
//    without distortion.
//    Some functions, such as \cancel, need to vary their aspect ratio. These
//    functions do not get the overflow SVG treatment.
// Second Brush Stroke
//    Low resolution monitors struggle to display images in fine detail.
//    So browsers apply anti-aliasing. A long straight arrow shaft therefore
//    will sometimes appear as if it has a blurred edge.
//    To mitigate this, these SVG files contain a second "brush-stroke" on the
//    arrow shafts. That is, a second long thin rectangular SVG path has been
//    written directly on top of each arrow shaft. This reinforcement causes
//    some of the screen pixels to display as black instead of the anti-aliased
//    gray pixel that a  single path would generate. So we get arrow shafts
//    whose edges appear to be sharper.
// In the katexImagesData object just below, the dimensions all
// correspond to path geometry inside the relevant SVG.
// For example, \overrightarrow uses the same arrowhead as glyph U+2192
// from the KaTeX Main font. The scaling factor is 1000.
// That is, inside the font, that arrowhead is 522 units tall, which
// corresponds to 0.522 em inside the document.


var katexImagesData = {
  //   path(s), minWidth, height, align
  overrightarrow: [["rightarrow"], 0.888, 522, "xMaxYMin"],
  overleftarrow: [["leftarrow"], 0.888, 522, "xMinYMin"],
  underrightarrow: [["rightarrow"], 0.888, 522, "xMaxYMin"],
  underleftarrow: [["leftarrow"], 0.888, 522, "xMinYMin"],
  xrightarrow: [["rightarrow"], 1.469, 522, "xMaxYMin"],
  "\\cdrightarrow": [["rightarrow"], 3.0, 522, "xMaxYMin"],
  // CD minwwidth2.5pc
  xleftarrow: [["leftarrow"], 1.469, 522, "xMinYMin"],
  "\\cdleftarrow": [["leftarrow"], 3.0, 522, "xMinYMin"],
  Overrightarrow: [["doublerightarrow"], 0.888, 560, "xMaxYMin"],
  xRightarrow: [["doublerightarrow"], 1.526, 560, "xMaxYMin"],
  xLeftarrow: [["doubleleftarrow"], 1.526, 560, "xMinYMin"],
  overleftharpoon: [["leftharpoon"], 0.888, 522, "xMinYMin"],
  xleftharpoonup: [["leftharpoon"], 0.888, 522, "xMinYMin"],
  xleftharpoondown: [["leftharpoondown"], 0.888, 522, "xMinYMin"],
  overrightharpoon: [["rightharpoon"], 0.888, 522, "xMaxYMin"],
  xrightharpoonup: [["rightharpoon"], 0.888, 522, "xMaxYMin"],
  xrightharpoondown: [["rightharpoondown"], 0.888, 522, "xMaxYMin"],
  xlongequal: [["longequal"], 0.888, 334, "xMinYMin"],
  "\\cdlongequal": [["longequal"], 3.0, 334, "xMinYMin"],
  xtwoheadleftarrow: [["twoheadleftarrow"], 0.888, 334, "xMinYMin"],
  xtwoheadrightarrow: [["twoheadrightarrow"], 0.888, 334, "xMaxYMin"],
  overleftrightarrow: [["leftarrow", "rightarrow"], 0.888, 522],
  overbrace: [["leftbrace", "midbrace", "rightbrace"], 1.6, 548],
  underbrace: [["leftbraceunder", "midbraceunder", "rightbraceunder"], 1.6, 548],
  underleftrightarrow: [["leftarrow", "rightarrow"], 0.888, 522],
  xleftrightarrow: [["leftarrow", "rightarrow"], 1.75, 522],
  xLeftrightarrow: [["doubleleftarrow", "doublerightarrow"], 1.75, 560],
  xrightleftharpoons: [["leftharpoondownplus", "rightharpoonplus"], 1.75, 716],
  xleftrightharpoons: [["leftharpoonplus", "rightharpoondownplus"], 1.75, 716],
  xhookleftarrow: [["leftarrow", "righthook"], 1.08, 522],
  xhookrightarrow: [["lefthook", "rightarrow"], 1.08, 522],
  overlinesegment: [["leftlinesegment", "rightlinesegment"], 0.888, 522],
  underlinesegment: [["leftlinesegment", "rightlinesegment"], 0.888, 522],
  overgroup: [["leftgroup", "rightgroup"], 0.888, 342],
  undergroup: [["leftgroupunder", "rightgroupunder"], 0.888, 342],
  xmapsto: [["leftmapsto", "rightarrow"], 1.5, 522],
  xtofrom: [["leftToFrom", "rightToFrom"], 1.75, 528],
  // The next three arrows are from the mhchem package.
  // In mhchem.sty, min-length is 2.0em. But these arrows might appear in the
  // document as \xrightarrow or \xrightleftharpoons. Those have
  // min-length = 1.75em, so we set min-length on these next three to match.
  xrightleftarrows: [["baraboveleftarrow", "rightarrowabovebar"], 1.75, 901],
  xrightequilibrium: [["baraboveshortleftharpoon", "rightharpoonaboveshortbar"], 1.75, 716],
  xleftequilibrium: [["shortbaraboveleftharpoon", "shortrightharpoonabovebar"], 1.75, 716]
};

var groupLength = function groupLength(arg) {
  if (arg.type === "ordgroup") {
    return arg.body.length;
  } else {
    return 1;
  }
};

var svgSpan = function svgSpan(group, options) {
  // Create a span with inline SVG for the element.
  function buildSvgSpan_() {
    var viewBoxWidth = 400000; // default

    var label = group.label.substr(1);

    if (utils.contains(["widehat", "widecheck", "widetilde", "utilde"], label)) {
      // Each type in the `if` statement corresponds to one of the ParseNode
      // types below. This narrowing is required to access `grp.base`.
      // $FlowFixMe
      var grp = group; // There are four SVG images available for each function.
      // Choose a taller image when there are more characters.

      var numChars = groupLength(grp.base);
      var viewBoxHeight;
      var pathName;

      var _height;

      if (numChars > 5) {
        if (label === "widehat" || label === "widecheck") {
          viewBoxHeight = 420;
          viewBoxWidth = 2364;
          _height = 0.42;
          pathName = label + "4";
        } else {
          viewBoxHeight = 312;
          viewBoxWidth = 2340;
          _height = 0.34;
          pathName = "tilde4";
        }
      } else {
        var imgIndex = [1, 1, 2, 2, 3, 3][numChars];

        if (label === "widehat" || label === "widecheck") {
          viewBoxWidth = [0, 1062, 2364, 2364, 2364][imgIndex];
          viewBoxHeight = [0, 239, 300, 360, 420][imgIndex];
          _height = [0, 0.24, 0.3, 0.3, 0.36, 0.42][imgIndex];
          pathName = label + imgIndex;
        } else {
          viewBoxWidth = [0, 600, 1033, 2339, 2340][imgIndex];
          viewBoxHeight = [0, 260, 286, 306, 312][imgIndex];
          _height = [0, 0.26, 0.286, 0.3, 0.306, 0.34][imgIndex];
          pathName = "tilde" + imgIndex;
        }
      }

      var path = new PathNode(pathName);
      var svgNode = new SvgNode([path], {
        "width": "100%",
        "height": makeEm(_height),
        "viewBox": "0 0 " + viewBoxWidth + " " + viewBoxHeight,
        "preserveAspectRatio": "none"
      });
      return {
        span: buildCommon.makeSvgSpan([], [svgNode], options),
        minWidth: 0,
        height: _height
      };
    } else {
      var spans = [];
      var data = katexImagesData[label];
      var paths = data[0],
          _minWidth = data[1],
          _viewBoxHeight = data[2];

      var _height2 = _viewBoxHeight / 1000;

      var numSvgChildren = paths.length;
      var widthClasses;
      var aligns;

      if (numSvgChildren === 1) {
        // $FlowFixMe: All these cases must be of the 4-tuple type.
        var align1 = data[3];
        widthClasses = ["hide-tail"];
        aligns = [align1];
      } else if (numSvgChildren === 2) {
        widthClasses = ["halfarrow-left", "halfarrow-right"];
        aligns = ["xMinYMin", "xMaxYMin"];
      } else if (numSvgChildren === 3) {
        widthClasses = ["brace-left", "brace-center", "brace-right"];
        aligns = ["xMinYMin", "xMidYMin", "xMaxYMin"];
      } else {
        throw new Error("Correct katexImagesData or update code here to support\n                    " + numSvgChildren + " children.");
      }

      for (var i = 0; i < numSvgChildren; i++) {
        var _path = new PathNode(paths[i]);

        var _svgNode = new SvgNode([_path], {
          "width": "400em",
          "height": makeEm(_height2),
          "viewBox": "0 0 " + viewBoxWidth + " " + _viewBoxHeight,
          "preserveAspectRatio": aligns[i] + " slice"
        });

        var _span = buildCommon.makeSvgSpan([widthClasses[i]], [_svgNode], options);

        if (numSvgChildren === 1) {
          return {
            span: _span,
            minWidth: _minWidth,
            height: _height2
          };
        } else {
          _span.style.height = makeEm(_height2);
          spans.push(_span);
        }
      }

      return {
        span: buildCommon.makeSpan(["stretchy"], spans, options),
        minWidth: _minWidth,
        height: _height2
      };
    }
  } // buildSvgSpan_()


  var _buildSvgSpan_ = buildSvgSpan_(),
      span = _buildSvgSpan_.span,
      minWidth = _buildSvgSpan_.minWidth,
      height = _buildSvgSpan_.height; // Note that we are returning span.depth = 0.
  // Any adjustments relative to the baseline must be done in buildHTML.


  span.height = height;
  span.style.height = makeEm(height);

  if (minWidth > 0) {
    span.style.minWidth = makeEm(minWidth);
  }

  return span;
};

var encloseSpan = function encloseSpan(inner, label, topPad, bottomPad, options) {
  // Return an image span for \cancel, \bcancel, \xcancel, \fbox, or \angl
  var img;
  var totalHeight = inner.height + inner.depth + topPad + bottomPad;

  if (/fbox|color|angl/.test(label)) {
    img = buildCommon.makeSpan(["stretchy", label], [], options);

    if (label === "fbox") {
      var color = options.color && options.getColor();

      if (color) {
        img.style.borderColor = color;
      }
    }
  } else {
    // \cancel, \bcancel, or \xcancel
    // Since \cancel's SVG is inline and it omits the viewBox attribute,
    // its stroke-width will not vary with span area.
    var lines = [];

    if (/^[bx]cancel$/.test(label)) {
      lines.push(new LineNode({
        "x1": "0",
        "y1": "0",
        "x2": "100%",
        "y2": "100%",
        "stroke-width": "0.046em"
      }));
    }

    if (/^x?cancel$/.test(label)) {
      lines.push(new LineNode({
        "x1": "0",
        "y1": "100%",
        "x2": "100%",
        "y2": "0",
        "stroke-width": "0.046em"
      }));
    }

    var svgNode = new SvgNode(lines, {
      "width": "100%",
      "height": makeEm(totalHeight)
    });
    img = buildCommon.makeSvgSpan([], [svgNode], options);
  }

  img.height = totalHeight;
  img.style.height = makeEm(totalHeight);
  return img;
};

/* harmony default export */ var stretchy = ({
  encloseSpan: encloseSpan,
  mathMLnode: mathMLnode,
  svgSpan: svgSpan
});


/**
 * Asserts that the node is of the given type and returns it with stricter
 * typing. Throws if the node's type does not match.
 */
function assertNodeType(node, type) {
  if (!node || node.type !== type) {
    throw new Error("Expected node of type " + type + ", but got " + (node ? "node of type " + node.type : String(node)));
  } // $FlowFixMe, >=0.125


  return node;
}
/**
 * Returns the node more strictly typed iff it is of the given type. Otherwise,
 * returns null.
 */

function assertSymbolNodeType(node) {
  var typedNode = checkSymbolNodeType(node);

  if (!typedNode) {
    throw new Error("Expected node of symbol group type, but got " + (node ? "node of type " + node.type : String(node)));
  }

  return typedNode;
}
/**
 * Returns the node more strictly typed iff it is of the given type. Otherwise,
 * returns null.
 */

function checkSymbolNodeType(node) {
  if (node && (node.type === "atom" || NON_ATOMS.hasOwnProperty(node.type))) {
    // $FlowFixMe
    return node;
  }

  return null;
}










// NOTE: Unlike most `htmlBuilder`s, this one handles not only "accent", but
// also "supsub" since an accent can affect super/subscripting.
var htmlBuilder = function htmlBuilder(grp, options) {
  // Accents are handled in the TeXbook pg. 443, rule 12.
  var base;
  var group;
  var supSubGroup;

  if (grp && grp.type === "supsub") {
    // If our base is a character box, and we have superscripts and
    // subscripts, the supsub will defer to us. In particular, we want
    // to attach the superscripts and subscripts to the inner body (so
    // that the position of the superscripts and subscripts won't be
    // affected by the height of the accent). We accomplish this by
    // sticking the base of the accent into the base of the supsub, and
    // rendering that, while keeping track of where the accent is.
    // The real accent group is the base of the supsub group
    group = assertNodeType(grp.base, "accent"); // The character box is the base of the accent group

    base = group.base; // Stick the character box into the base of the supsub group

    grp.base = base; // Rerender the supsub group with its new base, and store that
    // result.

    supSubGroup = assertSpan(buildGroup(grp, options)); // reset original base

    grp.base = group;
  } else {
    group = assertNodeType(grp, "accent");
    base = group.base;
  } // Build the base group


  var body = buildGroup(base, options.havingCrampedStyle()); // Does the accent need to shift for the skew of a character?

  var mustShift = group.isShifty && utils.isCharacterBox(base); // Calculate the skew of the accent. This is based on the line "If the
  // nucleus is not a single character, let s = 0; otherwise set s to the
  // kern amount for the nucleus followed by the \skewchar of its font."
  // Note that our skew metrics are just the kern between each character
  // and the skewchar.

  var skew = 0;

  if (mustShift) {
    // If the base is a character box, then we want the skew of the
    // innermost character. To do that, we find the innermost character:
    var baseChar = utils.getBaseElem(base); // Then, we render its group to get the symbol inside it

    var baseGroup = buildGroup(baseChar, options.havingCrampedStyle()); // Finally, we pull the skew off of the symbol.

    skew = assertSymbolDomNode(baseGroup).skew; // Note that we now throw away baseGroup, because the layers we
    // removed with getBaseElem might contain things like \color which
    // we can't get rid of.
    // TODO(emily): Find a better way to get the skew
  }

  var accentBelow = group.label === "\\c"; // calculate the amount of space between the body and the accent

  var clearance = accentBelow ? body.height + body.depth : Math.min(body.height, options.fontMetrics().xHeight); // Build the accent

  var accentBody;

  if (!group.isStretchy) {
    var accent;
    var width;

    if (group.label === "\\vec") {
      // Before version 0.9, \vec used the combining font glyph U+20D7.
      // But browsers, especially Safari, are not consistent in how they
      // render combining characters when not preceded by a character.
      // So now we use an SVG.
      // If Safari reforms, we should consider reverting to the glyph.
      accent = buildCommon.staticSvg("vec", options);
      width = buildCommon.svgData.vec[1];
    } else {
      accent = buildCommon.makeOrd({
        mode: group.mode,
        text: group.label
      }, options, "textord");
      accent = assertSymbolDomNode(accent); // Remove the italic correction of the accent, because it only serves to
      // shift the accent over to a place we don't want.

      accent.italic = 0;
      width = accent.width;

      if (accentBelow) {
        clearance += accent.depth;
      }
    }

    accentBody = buildCommon.makeSpan(["accent-body"], [accent]); // "Full" accents expand the width of the resulting symbol to be
    // at least the width of the accent, and overlap directly onto the
    // character without any vertical offset.

    var accentFull = group.label === "\\textcircled";

    if (accentFull) {
      accentBody.classes.push('accent-full');
      clearance = body.height;
    } // Shift the accent over by the skew.


    var left = skew; // CSS defines `.katex .accent .accent-body:not(.accent-full) { width: 0 }`
    // so that the accent doesn't contribute to the bounding box.
    // We need to shift the character by its width (effectively half
    // its width) to compensate.

    if (!accentFull) {
      left -= width / 2;
    }

    accentBody.style.left = makeEm(left); // \textcircled uses the \bigcirc glyph, so it needs some
    // vertical adjustment to match LaTeX.

    if (group.label === "\\textcircled") {
      accentBody.style.top = ".2em";
    }

    accentBody = buildCommon.makeVList({
      positionType: "firstBaseline",
      children: [{
        type: "elem",
        elem: body
      }, {
        type: "kern",
        size: -clearance
      }, {
        type: "elem",
        elem: accentBody
      }]
    }, options);
  } else {
    accentBody = stretchy.svgSpan(group, options);
    accentBody = buildCommon.makeVList({
      positionType: "firstBaseline",
      children: [{
        type: "elem",
        elem: body
      }, {
        type: "elem",
        elem: accentBody,
        wrapperClasses: ["svg-align"],
        wrapperStyle: skew > 0 ? {
          width: "calc(100% - " + makeEm(2 * skew) + ")",
          marginLeft: makeEm(2 * skew)
        } : undefined
      }]
    }, options);
  }

  var accentWrap = buildCommon.makeSpan(["mord", "accent"], [accentBody], options);

  if (supSubGroup) {
    // Here, we replace the "base" child of the supsub with our newly
    // generated accent.
    supSubGroup.children[0] = accentWrap; // Since we don't rerun the height calculation after replacing the
    // accent, we manually recalculate height.

    supSubGroup.height = Math.max(accentWrap.height, supSubGroup.height); // Accents should always be ords, even when their innards are not.

    supSubGroup.classes[0] = "mord";
    return supSubGroup;
  } else {
    return accentWrap;
  }
};

var mathmlBuilder = function mathmlBuilder(group, options) {
  var accentNode = group.isStretchy ? stretchy.mathMLnode(group.label) : new mathMLTree.MathNode("mo", [makeText(group.label, group.mode)]);
  var node = new mathMLTree.MathNode("mover", [buildMathML_buildGroup(group.base, options), accentNode]);
  node.setAttribute("accent", "true");
  return node;
};

var NON_STRETCHY_ACCENT_REGEX = new RegExp(["\\acute", "\\grave", "\\ddot", "\\tilde", "\\bar", "\\breve", "\\check", "\\hat", "\\vec", "\\dot", "\\mathring"].map(function (accent) {
  return "\\" + accent;
}).join("|")); // Accents

defineFunction({
  type: "accent",
  names: ["\\acute", "\\grave", "\\ddot", "\\tilde", "\\bar", "\\breve", "\\check", "\\hat", "\\vec", "\\dot", "\\mathring", "\\widecheck", "\\widehat", "\\widetilde", "\\overrightarrow", "\\overleftarrow", "\\Overrightarrow", "\\overleftrightarrow", "\\overgroup", "\\overlinesegment", "\\overleftharpoon", "\\overrightharpoon"],
  props: {
    numArgs: 1
  },
  handler: function handler(context, args) {
    var base = normalizeArgument(args[0]);
    var isStretchy = !NON_STRETCHY_ACCENT_REGEX.test(context.funcName);
    var isShifty = !isStretchy || context.funcName === "\\widehat" || context.funcName === "\\widetilde" || context.funcName === "\\widecheck";
    return {
      type: "accent",
      mode: context.parser.mode,
      label: context.funcName,
      isStretchy: isStretchy,
      isShifty: isShifty,
      base: base
    };
  },
  htmlBuilder: htmlBuilder,
  mathmlBuilder: mathmlBuilder
}); // Text-mode accents

defineFunction({
  type: "accent",
  names: ["\\'", "\\`", "\\^", "\\~", "\\=", "\\u", "\\.", '\\"', "\\c", "\\r", "\\H", "\\v", "\\textcircled"],
  props: {
    numArgs: 1,
    allowedInText: true,
    allowedInMath: true,
    // unless in strict mode
    argTypes: ["primitive"]
  },
  handler: function handler(context, args) {
    var base = args[0];
    var mode = context.parser.mode;

    if (mode === "math") {
      context.parser.settings.reportNonstrict("mathVsTextAccents", "LaTeX's accent " + context.funcName + " works only in text mode");
      mode = "text";
    }

    return {
      type: "accent",
      mode: mode,
      label: context.funcName,
      isStretchy: false,
      isShifty: true,
      base: base
    };
  },
  htmlBuilder: htmlBuilder,
  mathmlBuilder: mathmlBuilder
});
// Horizontal overlap functions






defineFunction({
  type: "accentUnder",
  names: ["\\underleftarrow", "\\underrightarrow", "\\underleftrightarrow", "\\undergroup", "\\underlinesegment", "\\utilde"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var base = args[0];
    return {
      type: "accentUnder",
      mode: parser.mode,
      label: funcName,
      base: base
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // Treat under accents much like underlines.
    var innerGroup = buildGroup(group.base, options);
    var accentBody = stretchy.svgSpan(group, options);
    var kern = group.label === "\\utilde" ? 0.12 : 0; // Generate the vlist, with the appropriate kerns

    var vlist = buildCommon.makeVList({
      positionType: "top",
      positionData: innerGroup.height,
      children: [{
        type: "elem",
        elem: accentBody,
        wrapperClasses: ["svg-align"]
      }, {
        type: "kern",
        size: kern
      }, {
        type: "elem",
        elem: innerGroup
      }]
    }, options);
    return buildCommon.makeSpan(["mord", "accentunder"], [vlist], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var accentNode = stretchy.mathMLnode(group.label);
    var node = new mathMLTree.MathNode("munder", [buildMathML_buildGroup(group.base, options), accentNode]);
    node.setAttribute("accentunder", "true");
    return node;
  }
});







// Helper function
var paddedNode = function paddedNode(group) {
  var node = new mathMLTree.MathNode("mpadded", group ? [group] : []);
  node.setAttribute("width", "+0.6em");
  node.setAttribute("lspace", "0.3em");
  return node;
}; // Stretchy arrows with an optional argument


defineFunction({
  type: "xArrow",
  names: ["\\xleftarrow", "\\xrightarrow", "\\xLeftarrow", "\\xRightarrow", "\\xleftrightarrow", "\\xLeftrightarrow", "\\xhookleftarrow", "\\xhookrightarrow", "\\xmapsto", "\\xrightharpoondown", "\\xrightharpoonup", "\\xleftharpoondown", "\\xleftharpoonup", "\\xrightleftharpoons", "\\xleftrightharpoons", "\\xlongequal", "\\xtwoheadrightarrow", "\\xtwoheadleftarrow", "\\xtofrom", // The next 3 functions are here to support the mhchem extension.
  // Direct use of these functions is discouraged and may break someday.
  "\\xrightleftarrows", "\\xrightequilibrium", "\\xleftequilibrium", // The next 3 functions are here only to support the {CD} environment.
  "\\\\cdrightarrow", "\\\\cdleftarrow", "\\\\cdlongequal"],
  props: {
    numArgs: 1,
    numOptionalArgs: 1
  },
  handler: function handler(_ref, args, optArgs) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    return {
      type: "xArrow",
      mode: parser.mode,
      label: funcName,
      body: args[0],
      below: optArgs[0]
    };
  },
  // Flow is unable to correctly infer the type of `group`, even though it's
  // unamibiguously determined from the passed-in `type` above.
  htmlBuilder: function htmlBuilder(group, options) {
    var style = options.style; // Build the argument groups in the appropriate style.
    // Ref: amsmath.dtx:   \hbox{$\scriptstyle\mkern#3mu{#6}\mkern#4mu$}%
    // Some groups can return document fragments.  Handle those by wrapping
    // them in a span.

    var newOptions = options.havingStyle(style.sup());
    var upperGroup = buildCommon.wrapFragment(buildGroup(group.body, newOptions, options), options);
    var arrowPrefix = group.label.slice(0, 2) === "\\x" ? "x" : "cd";
    upperGroup.classes.push(arrowPrefix + "-arrow-pad");
    var lowerGroup;

    if (group.below) {
      // Build the lower group
      newOptions = options.havingStyle(style.sub());
      lowerGroup = buildCommon.wrapFragment(buildGroup(group.below, newOptions, options), options);
      lowerGroup.classes.push(arrowPrefix + "-arrow-pad");
    }

    var arrowBody = stretchy.svgSpan(group, options); // Re shift: Note that stretchy.svgSpan returned arrowBody.depth = 0.
    // The point we want on the math axis is at 0.5 * arrowBody.height.

    var arrowShift = -options.fontMetrics().axisHeight + 0.5 * arrowBody.height; // 2 mu kern. Ref: amsmath.dtx: #7\if0#2\else\mkern#2mu\fi

    var upperShift = -options.fontMetrics().axisHeight - 0.5 * arrowBody.height - 0.111; // 0.111 em = 2 mu

    if (upperGroup.depth > 0.25 || group.label === "\\xleftequilibrium") {
      upperShift -= upperGroup.depth; // shift up if depth encroaches
    } // Generate the vlist


    var vlist;

    if (lowerGroup) {
      var lowerShift = -options.fontMetrics().axisHeight + lowerGroup.height + 0.5 * arrowBody.height + 0.111;
      vlist = buildCommon.makeVList({
        positionType: "individualShift",
        children: [{
          type: "elem",
          elem: upperGroup,
          shift: upperShift
        }, {
          type: "elem",
          elem: arrowBody,
          shift: arrowShift
        }, {
          type: "elem",
          elem: lowerGroup,
          shift: lowerShift
        }]
      }, options);
    } else {
      vlist = buildCommon.makeVList({
        positionType: "individualShift",
        children: [{
          type: "elem",
          elem: upperGroup,
          shift: upperShift
        }, {
          type: "elem",
          elem: arrowBody,
          shift: arrowShift
        }]
      }, options);
    } // $FlowFixMe: Replace this with passing "svg-align" into makeVList.


    vlist.children[0].children[0].children[1].classes.push("svg-align");
    return buildCommon.makeSpan(["mrel", "x-arrow"], [vlist], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var arrowNode = stretchy.mathMLnode(group.label);
    arrowNode.setAttribute("minsize", group.label.charAt(0) === "x" ? "1.75em" : "3.0em");
    var node;

    if (group.body) {
      var upperNode = paddedNode(buildMathML_buildGroup(group.body, options));

      if (group.below) {
        var lowerNode = paddedNode(buildMathML_buildGroup(group.below, options));
        node = new mathMLTree.MathNode("munderover", [arrowNode, lowerNode, upperNode]);
      } else {
        node = new mathMLTree.MathNode("mover", [arrowNode, upperNode]);
      }
    } else if (group.below) {
      var _lowerNode = paddedNode(buildMathML_buildGroup(group.below, options));

      node = new mathMLTree.MathNode("munder", [arrowNode, _lowerNode]);
    } else {
      // This should never happen.
      // Parser.js throws an error if there is no argument.
      node = paddedNode();
      node = new mathMLTree.MathNode("mover", [arrowNode, node]);
    }

    return node;
  }
});








var cdArrowFunctionName = {
  ">": "\\\\cdrightarrow",
  "<": "\\\\cdleftarrow",
  "=": "\\\\cdlongequal",
  "A": "\\uparrow",
  "V": "\\downarrow",
  "|": "\\Vert",
  ".": "no arrow"
};

var newCell = function newCell() {
  // Create an empty cell, to be filled below with parse nodes.
  // The parseTree from this module must be constructed like the
  // one created by parseArray(), so an empty CD cell must
  // be a ParseNode<"styling">. And CD is always displaystyle.
  // So these values are fixed and flow can do implicit typing.
  return {
    type: "styling",
    body: [],
    mode: "math",
    style: "display"
  };
};

var isStartOfArrow = function isStartOfArrow(node) {
  return node.type === "textord" && node.text === "@";
};

var isLabelEnd = function isLabelEnd(node, endChar) {
  return (node.type === "mathord" || node.type === "atom") && node.text === endChar;
};

function cdArrow(arrowChar, labels, parser) {
  // Return a parse tree of an arrow and its labels.
  // This acts in a way similar to a macro expansion.
  var funcName = cdArrowFunctionName[arrowChar];

  switch (funcName) {
    case "\\\\cdrightarrow":
    case "\\\\cdleftarrow":
      return parser.callFunction(funcName, [labels[0]], [labels[1]]);

    case "\\uparrow":
    case "\\downarrow":
      {
        var leftLabel = parser.callFunction("\\\\cdleft", [labels[0]], []);
        var bareArrow = {
          type: "atom",
          text: funcName,
          mode: "math",
          family: "rel"
        };
        var sizedArrow = parser.callFunction("\\Big", [bareArrow], []);
        var rightLabel = parser.callFunction("\\\\cdright", [labels[1]], []);
        var arrowGroup = {
          type: "ordgroup",
          mode: "math",
          body: [leftLabel, sizedArrow, rightLabel]
        };
        return parser.callFunction("\\\\cdparent", [arrowGroup], []);
      }

    case "\\\\cdlongequal":
      return parser.callFunction("\\\\cdlongequal", [], []);

    case "\\Vert":
      {
        var arrow = {
          type: "textord",
          text: "\\Vert",
          mode: "math"
        };
        return parser.callFunction("\\Big", [arrow], []);
      }

    default:
      return {
        type: "textord",
        text: " ",
        mode: "math"
      };
  }
}

function parseCD(parser) {
  // Get the array's parse nodes with \\ temporarily mapped to \cr.
  var parsedRows = [];
  parser.gullet.beginGroup();
  parser.gullet.macros.set("\\cr", "\\\\\\relax");
  parser.gullet.beginGroup();

  while (true) {
    // eslint-disable-line no-constant-condition
    // Get the parse nodes for the next row.
    parsedRows.push(parser.parseExpression(false, "\\\\"));
    parser.gullet.endGroup();
    parser.gullet.beginGroup();
    var next = parser.fetch().text;

    if (next === "&" || next === "\\\\") {
      parser.consume();
    } else if (next === "\\end") {
      if (parsedRows[parsedRows.length - 1].length === 0) {
        parsedRows.pop(); // final row ended in \\
      }

      break;
    } else {
      throw new src_ParseError("Expected \\\\ or \\cr or \\end", parser.nextToken);
    }
  }

  var row = [];
  var body = [row]; // Loop thru the parse nodes. Collect them into cells and arrows.

  for (var i = 0; i < parsedRows.length; i++) {
    // Start a new row.
    var rowNodes = parsedRows[i]; // Create the first cell.

    var cell = newCell();

    for (var j = 0; j < rowNodes.length; j++) {
      if (!isStartOfArrow(rowNodes[j])) {
        // If a parseNode is not an arrow, it goes into a cell.
        cell.body.push(rowNodes[j]);
      } else {
        // Parse node j is an "@", the start of an arrow.
        // Before starting on the arrow, push the cell into `row`.
        row.push(cell); // Now collect parseNodes into an arrow.
        // The character after "@" defines the arrow type.

        j += 1;
        var arrowChar = assertSymbolNodeType(rowNodes[j]).text; // Create two empty label nodes. We may or may not use them.

        var labels = new Array(2);
        labels[0] = {
          type: "ordgroup",
          mode: "math",
          body: []
        };
        labels[1] = {
          type: "ordgroup",
          mode: "math",
          body: []
        }; // Process the arrow.

        if ("=|.".indexOf(arrowChar) > -1) ; else if ("<>AV".indexOf(arrowChar) > -1) {
          // Four arrows, `@>>>`, `@<<<`, `@AAA`, and `@VVV`, each take
          // two optional labels. E.g. the right-point arrow syntax is
          // really:  @>{optional label}>{optional label}>
          // Collect parseNodes into labels.
          for (var labelNum = 0; labelNum < 2; labelNum++) {
            var inLabel = true;

            for (var k = j + 1; k < rowNodes.length; k++) {
              if (isLabelEnd(rowNodes[k], arrowChar)) {
                inLabel = false;
                j = k;
                break;
              }

              if (isStartOfArrow(rowNodes[k])) {
                throw new src_ParseError("Missing a " + arrowChar + " character to complete a CD arrow.", rowNodes[k]);
              }

              labels[labelNum].body.push(rowNodes[k]);
            }

            if (inLabel) {
              // isLabelEnd never returned a true.
              throw new src_ParseError("Missing a " + arrowChar + " character to complete a CD arrow.", rowNodes[j]);
            }
          }
        } else {
          throw new src_ParseError("Expected one of \"<>AV=|.\" after @", rowNodes[j]);
        } // Now join the arrow to its labels.


        var arrow = cdArrow(arrowChar, labels, parser); // Wrap the arrow in  ParseNode<"styling">.
        // This is done to match parseArray() behavior.

        var wrappedArrow = {
          type: "styling",
          body: [arrow],
          mode: "math",
          style: "display" // CD is always displaystyle.

        };
        row.push(wrappedArrow); // In CD's syntax, cells are implicit. That is, everything that
        // is not an arrow gets collected into a cell. So create an empty
        // cell now. It will collect upcoming parseNodes.

        cell = newCell();
      }
    }

    if (i % 2 === 0) {
      // Even-numbered rows consist of: cell, arrow, cell, arrow, ... cell
      // The last cell is not yet pushed into `row`, so:
      row.push(cell);
    } else {
      // Odd-numbered rows consist of: vert arrow, empty cell, ... vert arrow
      // Remove the empty cell that was placed at the beginning of `row`.
      row.shift();
    }

    row = [];
    body.push(row);
  } // End row group


  parser.gullet.endGroup(); // End array group defining \\

  parser.gullet.endGroup(); // define column separation.

  var cols = new Array(body[0].length).fill({
    type: "align",
    align: "c",
    pregap: 0.25,
    // CD package sets \enskip between columns.
    postgap: 0.25 // So pre and post each get half an \enskip, i.e. 0.25em.

  });
  return {
    type: "array",
    mode: "math",
    body: body,
    arraystretch: 1,
    addJot: true,
    rowGaps: [null],
    cols: cols,
    colSeparationType: "CD",
    hLinesBeforeRow: new Array(body.length + 1).fill([])
  };
} // The functions below are not available for general use.
// They are here only for internal use by the {CD} environment in placing labels
// next to vertical arrows.
// We don't need any such functions for horizontal arrows because we can reuse
// the functionality that already exists for extensible arrows.

defineFunction({
  type: "cdlabel",
  names: ["\\\\cdleft", "\\\\cdright"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    return {
      type: "cdlabel",
      mode: parser.mode,
      side: funcName.slice(4),
      label: args[0]
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var newOptions = options.havingStyle(options.style.sup());
    var label = buildCommon.wrapFragment(buildGroup(group.label, newOptions, options), options);
    label.classes.push("cd-label-" + group.side);
    label.style.bottom = makeEm(0.8 - label.depth); // Zero out label height & depth, so vertical align of arrow is set
    // by the arrow height, not by the label.

    label.height = 0;
    label.depth = 0;
    return label;
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var label = new mathMLTree.MathNode("mrow", [buildMathML_buildGroup(group.label, options)]);
    label = new mathMLTree.MathNode("mpadded", [label]);
    label.setAttribute("width", "0");

    if (group.side === "left") {
      label.setAttribute("lspace", "-1width");
    } // We have to guess at vertical alignment. We know the arrow is 1.8em tall,
    // But we don't know the height or depth of the label.


    label.setAttribute("voffset", "0.7em");
    label = new mathMLTree.MathNode("mstyle", [label]);
    label.setAttribute("displaystyle", "false");
    label.setAttribute("scriptlevel", "1");
    return label;
  }
});
defineFunction({
  type: "cdlabelparent",
  names: ["\\\\cdparent"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser;
    return {
      type: "cdlabelparent",
      mode: parser.mode,
      fragment: args[0]
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // Wrap the vertical arrow and its labels.
    // The parent gets position: relative. The child gets position: absolute.
    // So CSS can locate the label correctly.
    var parent = buildCommon.wrapFragment(buildGroup(group.fragment, options), options);
    parent.classes.push("cd-vert-arrow");
    return parent;
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    return new mathMLTree.MathNode("mrow", [buildMathML_buildGroup(group.fragment, options)]);
  }
});


 // \@char is an internal function that takes a grouped decimal argument like
// {123} and converts into symbol with code 123.  It is used by the *macro*
// \char defined in macros.js.

defineFunction({
  type: "textord",
  names: ["\\@char"],
  props: {
    numArgs: 1,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    var arg = assertNodeType(args[0], "ordgroup");
    var group = arg.body;
    var number = "";

    for (var i = 0; i < group.length; i++) {
      var node = assertNodeType(group[i], "textord");
      number += node.text;
    }

    var code = parseInt(number);
    var text;

    if (isNaN(code)) {
      throw new src_ParseError("\\@char has non-numeric argument " + number); // If we drop IE support, the following code could be replaced with
      // text = String.fromCodePoint(code)
    } else if (code < 0 || code >= 0x10ffff) {
      throw new src_ParseError("\\@char with invalid code point " + number);
    } else if (code <= 0xffff) {
      text = String.fromCharCode(code);
    } else {
      // Astral code point; split into surrogate halves
      code -= 0x10000;
      text = String.fromCharCode((code >> 10) + 0xd800, (code & 0x3ff) + 0xdc00);
    }

    return {
      type: "textord",
      mode: parser.mode,
      text: text
    };
  }
});







var color_htmlBuilder = function htmlBuilder(group, options) {
  var elements = buildExpression(group.body, options.withColor(group.color), false); // \color isn't supposed to affect the type of the elements it contains.
  // To accomplish this, we wrap the results in a fragment, so the inner
  // elements will be able to directly interact with their neighbors. For
  // example, `\color{red}{2 +} 3` has the same spacing as `2 + 3`

  return buildCommon.makeFragment(elements);
};

var color_mathmlBuilder = function mathmlBuilder(group, options) {
  var inner = buildMathML_buildExpression(group.body, options.withColor(group.color));
  var node = new mathMLTree.MathNode("mstyle", inner);
  node.setAttribute("mathcolor", group.color);
  return node;
};

defineFunction({
  type: "color",
  names: ["\\textcolor"],
  props: {
    numArgs: 2,
    allowedInText: true,
    argTypes: ["color", "original"]
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    var color = assertNodeType(args[0], "color-token").color;
    var body = args[1];
    return {
      type: "color",
      mode: parser.mode,
      color: color,
      body: ordargument(body)
    };
  },
  htmlBuilder: color_htmlBuilder,
  mathmlBuilder: color_mathmlBuilder
});
defineFunction({
  type: "color",
  names: ["\\color"],
  props: {
    numArgs: 1,
    allowedInText: true,
    argTypes: ["color"]
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser,
        breakOnTokenText = _ref2.breakOnTokenText;
    var color = assertNodeType(args[0], "color-token").color; // Set macro \current@color in current namespace to store the current
    // color, mimicking the behavior of color.sty.
    // This is currently used just to correctly color a \right
    // that follows a \color command.

    parser.gullet.macros.set("\\current@color", color); // Parse out the implicit body that should be colored.

    var body = parser.parseExpression(true, breakOnTokenText);
    return {
      type: "color",
      mode: parser.mode,
      color: color,
      body: body
    };
  },
  htmlBuilder: color_htmlBuilder,
  mathmlBuilder: color_mathmlBuilder
});
// Row breaks within tabular environments, and line breaks at top level




 // \DeclareRobustCommand\\{...\@xnewline}

defineFunction({
  type: "cr",
  names: ["\\\\"],
  props: {
    numArgs: 0,
    numOptionalArgs: 1,
    argTypes: ["size"],
    allowedInText: true
  },
  handler: function handler(_ref, args, optArgs) {
    var parser = _ref.parser;
    var size = optArgs[0];
    var newLine = !parser.settings.displayMode || !parser.settings.useStrictBehavior("newLineInDisplayMode", "In LaTeX, \\\\ or \\newline " + "does nothing in display mode");
    return {
      type: "cr",
      mode: parser.mode,
      newLine: newLine,
      size: size && assertNodeType(size, "size").value
    };
  },
  // The following builders are called only at the top level,
  // not within tabular/array environments.
  htmlBuilder: function htmlBuilder(group, options) {
    var span = buildCommon.makeSpan(["mspace"], [], options);

    if (group.newLine) {
      span.classes.push("newline");

      if (group.size) {
        span.style.marginTop = makeEm(calculateSize(group.size, options));
      }
    }

    return span;
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var node = new mathMLTree.MathNode("mspace");

    if (group.newLine) {
      node.setAttribute("linebreak", "newline");

      if (group.size) {
        node.setAttribute("height", makeEm(calculateSize(group.size, options)));
      }
    }

    return node;
  }
});



var globalMap = {
  "\\global": "\\global",
  "\\long": "\\\\globallong",
  "\\\\globallong": "\\\\globallong",
  "\\def": "\\gdef",
  "\\gdef": "\\gdef",
  "\\edef": "\\xdef",
  "\\xdef": "\\xdef",
  "\\let": "\\\\globallet",
  "\\futurelet": "\\\\globalfuture"
};

var checkControlSequence = function checkControlSequence(tok) {
  var name = tok.text;

  if (/^(?:[\\{}$&#^_]|EOF)$/.test(name)) {
    throw new src_ParseError("Expected a control sequence", tok);
  }

  return name;
};

var getRHS = function getRHS(parser) {
  var tok = parser.gullet.popToken();

  if (tok.text === "=") {
    // consume optional equals
    tok = parser.gullet.popToken();

    if (tok.text === " ") {
      // consume one optional space
      tok = parser.gullet.popToken();
    }
  }

  return tok;
};

var letCommand = function letCommand(parser, name, tok, global) {
  var macro = parser.gullet.macros.get(tok.text);

  if (macro == null) {
    // don't expand it later even if a macro with the same name is defined
    // e.g., \let\foo=\frac \def\frac{\relax} \frac12
    tok.noexpand = true;
    macro = {
      tokens: [tok],
      numArgs: 0,
      // reproduce the same behavior in expansion
      unexpandable: !parser.gullet.isExpandable(tok.text)
    };
  }

  parser.gullet.macros.set(name, macro, global);
}; // <assignment> -> <non-macro assignment>|<macro assignment>
// <non-macro assignment> -> <simple assignment>|\global<non-macro assignment>
// <macro assignment> -> <definition>|<prefix><macro assignment>
// <prefix> -> \global|\long|\outer


defineFunction({
  type: "internal",
  names: ["\\global", "\\long", "\\\\globallong" // can’t be entered directly
  ],
  props: {
    numArgs: 0,
    allowedInText: true
  },
  handler: function handler(_ref) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    parser.consumeSpaces();
    var token = parser.fetch();

    if (globalMap[token.text]) {
      // KaTeX doesn't have \par, so ignore \long
      if (funcName === "\\global" || funcName === "\\\\globallong") {
        token.text = globalMap[token.text];
      }

      return assertNodeType(parser.parseFunction(), "internal");
    }

    throw new src_ParseError("Invalid token after macro prefix", token);
  }
}); // Basic support for macro definitions: \def, \gdef, \edef, \xdef
// <definition> -> <def><control sequence><definition text>
// <def> -> \def|\gdef|\edef|\xdef
// <definition text> -> <parameter text><left brace><balanced text><right brace>

defineFunction({
  type: "internal",
  names: ["\\def", "\\gdef", "\\edef", "\\xdef"],
  props: {
    numArgs: 0,
    allowedInText: true,
    primitive: true
  },
  handler: function handler(_ref2) {
    var parser = _ref2.parser,
        funcName = _ref2.funcName;
    var tok = parser.gullet.popToken();
    var name = tok.text;

    if (/^(?:[\\{}$&#^_]|EOF)$/.test(name)) {
      throw new src_ParseError("Expected a control sequence", tok);
    }

    var numArgs = 0;
    var insert;
    var delimiters = [[]]; // <parameter text> contains no braces

    while (parser.gullet.future().text !== "{") {
      tok = parser.gullet.popToken();

      if (tok.text === "#") {
        // If the very last character of the <parameter text> is #, so that
        // this # is immediately followed by {, TeX will behave as if the {
        // had been inserted at the right end of both the parameter text
        // and the replacement text.
        if (parser.gullet.future().text === "{") {
          insert = parser.gullet.future();
          delimiters[numArgs].push("{");
          break;
        } // A parameter, the first appearance of # must be followed by 1,
        // the next by 2, and so on; up to nine #’s are allowed


        tok = parser.gullet.popToken();

        if (!/^[1-9]$/.test(tok.text)) {
          throw new src_ParseError("Invalid argument number \"" + tok.text + "\"");
        }

        if (parseInt(tok.text) !== numArgs + 1) {
          throw new src_ParseError("Argument number \"" + tok.text + "\" out of order");
        }

        numArgs++;
        delimiters.push([]);
      } else if (tok.text === "EOF") {
        throw new src_ParseError("Expected a macro definition");
      } else {
        delimiters[numArgs].push(tok.text);
      }
    } // replacement text, enclosed in '{' and '}' and properly nested


    var _parser$gullet$consum = parser.gullet.consumeArg(),
        tokens = _parser$gullet$consum.tokens;

    if (insert) {
      tokens.unshift(insert);
    }

    if (funcName === "\\edef" || funcName === "\\xdef") {
      tokens = parser.gullet.expandTokens(tokens);
      tokens.reverse(); // to fit in with stack order
    } // Final arg is the expansion of the macro


    parser.gullet.macros.set(name, {
      tokens: tokens,
      numArgs: numArgs,
      delimiters: delimiters
    }, funcName === globalMap[funcName]);
    return {
      type: "internal",
      mode: parser.mode
    };
  }
}); // <simple assignment> -> <let assignment>
// <let assignment> -> \futurelet<control sequence><token><token>
//     | \let<control sequence><equals><one optional space><token>
// <equals> -> <optional spaces>|<optional spaces>=

defineFunction({
  type: "internal",
  names: ["\\let", "\\\\globallet" // can’t be entered directly
  ],
  props: {
    numArgs: 0,
    allowedInText: true,
    primitive: true
  },
  handler: function handler(_ref3) {
    var parser = _ref3.parser,
        funcName = _ref3.funcName;
    var name = checkControlSequence(parser.gullet.popToken());
    parser.gullet.consumeSpaces();
    var tok = getRHS(parser);
    letCommand(parser, name, tok, funcName === "\\\\globallet");
    return {
      type: "internal",
      mode: parser.mode
    };
  }
}); // ref: https://www.tug.org/TUGboat/tb09-3/tb22bechtolsheim.pdf

defineFunction({
  type: "internal",
  names: ["\\futurelet", "\\\\globalfuture" // can’t be entered directly
  ],
  props: {
    numArgs: 0,
    allowedInText: true,
    primitive: true
  },
  handler: function handler(_ref4) {
    var parser = _ref4.parser,
        funcName = _ref4.funcName;
    var name = checkControlSequence(parser.gullet.popToken());
    var middle = parser.gullet.popToken();
    var tok = parser.gullet.popToken();
    letCommand(parser, name, tok, funcName === "\\\\globalfuture");
    parser.gullet.pushToken(tok);
    parser.gullet.pushToken(middle);
    return {
      type: "internal",
      mode: parser.mode
    };
  }
});
/**
 * This file deals with creating delimiters of various sizes. The TeXbook
 * discusses these routines on page 441-442, in the "Another subroutine sets box
 * x to a specified variable delimiter" paragraph.
 *
 * There are three main routines here. `makeSmallDelim` makes a delimiter in the
 * normal font, but in either text, script, or scriptscript style.
 * `makeLargeDelim` makes a delimiter in textstyle, but in one of the Size1,
 * Size2, Size3, or Size4 fonts. `makeStackedDelim` makes a delimiter out of
 * smaller pieces that are stacked on top of one another.
 *
 * The functions take a parameter `center`, which determines if the delimiter
 * should be centered around the axis.
 *
 * Then, there are three exposed functions. `sizedDelim` makes a delimiter in
 * one of the given sizes. This is used for things like `\bigl`.
 * `customSizedDelim` makes a delimiter with a given total height+depth. It is
 * called in places like `\sqrt`. `leftRightDelim` makes an appropriate
 * delimiter which surrounds an expression of a given height an depth. It is
 * used in `\left` and `\right`.
 */











/**
 * Get the metrics for a given symbol and font, after transformation (i.e.
 * after following replacement from symbols.js)
 */
var getMetrics = function getMetrics(symbol, font, mode) {
  var replace = src_symbols.math[symbol] && src_symbols.math[symbol].replace;
  var metrics = getCharacterMetrics(replace || symbol, font, mode);

  if (!metrics) {
    throw new Error("Unsupported symbol " + symbol + " and font size " + font + ".");
  }

  return metrics;
};
/**
 * Puts a delimiter span in a given style, and adds appropriate height, depth,
 * and maxFontSizes.
 */


var styleWrap = function styleWrap(delim, toStyle, options, classes) {
  var newOptions = options.havingBaseStyle(toStyle);
  var span = buildCommon.makeSpan(classes.concat(newOptions.sizingClasses(options)), [delim], options);
  var delimSizeMultiplier = newOptions.sizeMultiplier / options.sizeMultiplier;
  span.height *= delimSizeMultiplier;
  span.depth *= delimSizeMultiplier;
  span.maxFontSize = newOptions.sizeMultiplier;
  return span;
};

var centerSpan = function centerSpan(span, options, style) {
  var newOptions = options.havingBaseStyle(style);
  var shift = (1 - options.sizeMultiplier / newOptions.sizeMultiplier) * options.fontMetrics().axisHeight;
  span.classes.push("delimcenter");
  span.style.top = makeEm(shift);
  span.height -= shift;
  span.depth += shift;
};
/**
 * Makes a small delimiter. This is a delimiter that comes in the Main-Regular
 * font, but is restyled to either be in textstyle, scriptstyle, or
 * scriptscriptstyle.
 */


var makeSmallDelim = function makeSmallDelim(delim, style, center, options, mode, classes) {
  var text = buildCommon.makeSymbol(delim, "Main-Regular", mode, options);
  var span = styleWrap(text, style, options, classes);

  if (center) {
    centerSpan(span, options, style);
  }

  return span;
};
/**
 * Builds a symbol in the given font size (note size is an integer)
 */


var mathrmSize = function mathrmSize(value, size, mode, options) {
  return buildCommon.makeSymbol(value, "Size" + size + "-Regular", mode, options);
};
/**
 * Makes a large delimiter. This is a delimiter that comes in the Size1, Size2,
 * Size3, or Size4 fonts. It is always rendered in textstyle.
 */


var makeLargeDelim = function makeLargeDelim(delim, size, center, options, mode, classes) {
  var inner = mathrmSize(delim, size, mode, options);
  var span = styleWrap(buildCommon.makeSpan(["delimsizing", "size" + size], [inner], options), src_Style.TEXT, options, classes);

  if (center) {
    centerSpan(span, options, src_Style.TEXT);
  }

  return span;
};
/**
 * Make a span from a font glyph with the given offset and in the given font.
 * This is used in makeStackedDelim to make the stacking pieces for the delimiter.
 */


var makeGlyphSpan = function makeGlyphSpan(symbol, font, mode) {
  var sizeClass; // Apply the correct CSS class to choose the right font.

  if (font === "Size1-Regular") {
    sizeClass = "delim-size1";
  } else
    /* if (font === "Size4-Regular") */
    {
      sizeClass = "delim-size4";
    }

  var corner = buildCommon.makeSpan(["delimsizinginner", sizeClass], [buildCommon.makeSpan([], [buildCommon.makeSymbol(symbol, font, mode)])]); // Since this will be passed into `makeVList` in the end, wrap the element
  // in the appropriate tag that VList uses.

  return {
    type: "elem",
    elem: corner
  };
};

var makeInner = function makeInner(ch, height, options) {
  // Create a span with inline SVG for the inner part of a tall stacked delimiter.
  var width = fontMetricsData["Size4-Regular"][ch.charCodeAt(0)] ? fontMetricsData["Size4-Regular"][ch.charCodeAt(0)][4] : fontMetricsData["Size1-Regular"][ch.charCodeAt(0)][4];
  var path = new PathNode("inner", innerPath(ch, Math.round(1000 * height)));
  var svgNode = new SvgNode([path], {
    "width": makeEm(width),
    "height": makeEm(height),
    // Override CSS rule `.katex svg { width: 100% }`
    "style": "width:" + makeEm(width),
    "viewBox": "0 0 " + 1000 * width + " " + Math.round(1000 * height),
    "preserveAspectRatio": "xMinYMin"
  });
  var span = buildCommon.makeSvgSpan([], [svgNode], options);
  span.height = height;
  span.style.height = makeEm(height);
  span.style.width = makeEm(width);
  return {
    type: "elem",
    elem: span
  };
}; // Helpers for makeStackedDelim


var lapInEms = 0.008;
var lap = {
  type: "kern",
  size: -1 * lapInEms
};
var verts = ["|", "\\lvert", "\\rvert", "\\vert"];
var doubleVerts = ["\\|", "\\lVert", "\\rVert", "\\Vert"];
/**
 * Make a stacked delimiter out of a given delimiter, with the total height at
 * least `heightTotal`. This routine is mentioned on page 442 of the TeXbook.
 */

var makeStackedDelim = function makeStackedDelim(delim, heightTotal, center, options, mode, classes) {
  // There are four parts, the top, an optional middle, a repeated part, and a
  // bottom.
  var top;
  var middle;
  var repeat;
  var bottom;
  top = repeat = bottom = delim;
  middle = null; // Also keep track of what font the delimiters are in

  var font = "Size1-Regular"; // We set the parts and font based on the symbol. Note that we use
  // '\u23d0' instead of '|' and '\u2016' instead of '\\|' for the
  // repeats of the arrows

  if (delim === "\\uparrow") {
    repeat = bottom = "\u23D0";
  } else if (delim === "\\Uparrow") {
    repeat = bottom = "\u2016";
  } else if (delim === "\\downarrow") {
    top = repeat = "\u23D0";
  } else if (delim === "\\Downarrow") {
    top = repeat = "\u2016";
  } else if (delim === "\\updownarrow") {
    top = "\\uparrow";
    repeat = "\u23D0";
    bottom = "\\downarrow";
  } else if (delim === "\\Updownarrow") {
    top = "\\Uparrow";
    repeat = "\u2016";
    bottom = "\\Downarrow";
  } else if (utils.contains(verts, delim)) {
    repeat = "\u2223";
  } else if (utils.contains(doubleVerts, delim)) {
    repeat = "\u2225";
  } else if (delim === "[" || delim === "\\lbrack") {
    top = "\u23A1";
    repeat = "\u23A2";
    bottom = "\u23A3";
    font = "Size4-Regular";
  } else if (delim === "]" || delim === "\\rbrack") {
    top = "\u23A4";
    repeat = "\u23A5";
    bottom = "\u23A6";
    font = "Size4-Regular";
  } else if (delim === "\\lfloor" || delim === "\u230A") {
    repeat = top = "\u23A2";
    bottom = "\u23A3";
    font = "Size4-Regular";
  } else if (delim === "\\lceil" || delim === "\u2308") {
    top = "\u23A1";
    repeat = bottom = "\u23A2";
    font = "Size4-Regular";
  } else if (delim === "\\rfloor" || delim === "\u230B") {
    repeat = top = "\u23A5";
    bottom = "\u23A6";
    font = "Size4-Regular";
  } else if (delim === "\\rceil" || delim === "\u2309") {
    top = "\u23A4";
    repeat = bottom = "\u23A5";
    font = "Size4-Regular";
  } else if (delim === "(" || delim === "\\lparen") {
    top = "\u239B";
    repeat = "\u239C";
    bottom = "\u239D";
    font = "Size4-Regular";
  } else if (delim === ")" || delim === "\\rparen") {
    top = "\u239E";
    repeat = "\u239F";
    bottom = "\u23A0";
    font = "Size4-Regular";
  } else if (delim === "\\{" || delim === "\\lbrace") {
    top = "\u23A7";
    middle = "\u23A8";
    bottom = "\u23A9";
    repeat = "\u23AA";
    font = "Size4-Regular";
  } else if (delim === "\\}" || delim === "\\rbrace") {
    top = "\u23AB";
    middle = "\u23AC";
    bottom = "\u23AD";
    repeat = "\u23AA";
    font = "Size4-Regular";
  } else if (delim === "\\lgroup" || delim === "\u27EE") {
    top = "\u23A7";
    bottom = "\u23A9";
    repeat = "\u23AA";
    font = "Size4-Regular";
  } else if (delim === "\\rgroup" || delim === "\u27EF") {
    top = "\u23AB";
    bottom = "\u23AD";
    repeat = "\u23AA";
    font = "Size4-Regular";
  } else if (delim === "\\lmoustache" || delim === "\u23B0") {
    top = "\u23A7";
    bottom = "\u23AD";
    repeat = "\u23AA";
    font = "Size4-Regular";
  } else if (delim === "\\rmoustache" || delim === "\u23B1") {
    top = "\u23AB";
    bottom = "\u23A9";
    repeat = "\u23AA";
    font = "Size4-Regular";
  } // Get the metrics of the four sections


  var topMetrics = getMetrics(top, font, mode);
  var topHeightTotal = topMetrics.height + topMetrics.depth;
  var repeatMetrics = getMetrics(repeat, font, mode);
  var repeatHeightTotal = repeatMetrics.height + repeatMetrics.depth;
  var bottomMetrics = getMetrics(bottom, font, mode);
  var bottomHeightTotal = bottomMetrics.height + bottomMetrics.depth;
  var middleHeightTotal = 0;
  var middleFactor = 1;

  if (middle !== null) {
    var middleMetrics = getMetrics(middle, font, mode);
    middleHeightTotal = middleMetrics.height + middleMetrics.depth;
    middleFactor = 2; // repeat symmetrically above and below middle
  } // Calcuate the minimal height that the delimiter can have.
  // It is at least the size of the top, bottom, and optional middle combined.


  var minHeight = topHeightTotal + bottomHeightTotal + middleHeightTotal; // Compute the number of copies of the repeat symbol we will need

  var repeatCount = Math.max(0, Math.ceil((heightTotal - minHeight) / (middleFactor * repeatHeightTotal))); // Compute the total height of the delimiter including all the symbols

  var realHeightTotal = minHeight + repeatCount * middleFactor * repeatHeightTotal; // The center of the delimiter is placed at the center of the axis. Note
  // that in this context, "center" means that the delimiter should be
  // centered around the axis in the current style, while normally it is
  // centered around the axis in textstyle.

  var axisHeight = options.fontMetrics().axisHeight;

  if (center) {
    axisHeight *= options.sizeMultiplier;
  } // Calculate the depth


  var depth = realHeightTotal / 2 - axisHeight; // Now, we start building the pieces that will go into the vlist
  // Keep a list of the pieces of the stacked delimiter

  var stack = []; // Add the bottom symbol

  stack.push(makeGlyphSpan(bottom, font, mode));
  stack.push(lap); // overlap

  if (middle === null) {
    // The middle section will be an SVG. Make it an extra 0.016em tall.
    // We'll overlap by 0.008em at top and bottom.
    var innerHeight = realHeightTotal - topHeightTotal - bottomHeightTotal + 2 * lapInEms;
    stack.push(makeInner(repeat, innerHeight, options));
  } else {
    // When there is a middle bit, we need the middle part and two repeated
    // sections
    var _innerHeight = (realHeightTotal - topHeightTotal - bottomHeightTotal - middleHeightTotal) / 2 + 2 * lapInEms;

    stack.push(makeInner(repeat, _innerHeight, options)); // Now insert the middle of the brace.

    stack.push(lap);
    stack.push(makeGlyphSpan(middle, font, mode));
    stack.push(lap);
    stack.push(makeInner(repeat, _innerHeight, options));
  } // Add the top symbol


  stack.push(lap);
  stack.push(makeGlyphSpan(top, font, mode)); // Finally, build the vlist

  var newOptions = options.havingBaseStyle(src_Style.TEXT);
  var inner = buildCommon.makeVList({
    positionType: "bottom",
    positionData: depth,
    children: stack
  }, newOptions);
  return styleWrap(buildCommon.makeSpan(["delimsizing", "mult"], [inner], newOptions), src_Style.TEXT, options, classes);
}; // All surds have 0.08em padding above the viniculum inside the SVG.
// That keeps browser span height rounding error from pinching the line.


var vbPad = 80; // padding above the surd, measured inside the viewBox.

var emPad = 0.08; // padding, in ems, measured in the document.

var sqrtSvg = function sqrtSvg(sqrtName, height, viewBoxHeight, extraViniculum, options) {
  var path = sqrtPath(sqrtName, extraViniculum, viewBoxHeight);
  var pathNode = new PathNode(sqrtName, path);
  var svg = new SvgNode([pathNode], {
    // Note: 1000:1 ratio of viewBox to document em width.
    "width": "400em",
    "height": makeEm(height),
    "viewBox": "0 0 400000 " + viewBoxHeight,
    "preserveAspectRatio": "xMinYMin slice"
  });
  return buildCommon.makeSvgSpan(["hide-tail"], [svg], options);
};
/**
 * Make a sqrt image of the given height,
 */


var makeSqrtImage = function makeSqrtImage(height, options) {
  // Define a newOptions that removes the effect of size changes such as \Huge.
  // We don't pick different a height surd for \Huge. For it, we scale up.
  var newOptions = options.havingBaseSizing(); // Pick the desired surd glyph from a sequence of surds.

  var delim = traverseSequence("\\surd", height * newOptions.sizeMultiplier, stackLargeDelimiterSequence, newOptions);
  var sizeMultiplier = newOptions.sizeMultiplier; // default
  // The standard sqrt SVGs each have a 0.04em thick viniculum.
  // If Settings.minRuleThickness is larger than that, we add extraViniculum.

  var extraViniculum = Math.max(0, options.minRuleThickness - options.fontMetrics().sqrtRuleThickness); // Create a span containing an SVG image of a sqrt symbol.

  var span;
  var spanHeight = 0;
  var texHeight = 0;
  var viewBoxHeight = 0;
  var advanceWidth; // We create viewBoxes with 80 units of "padding" above each surd.
  // Then browser rounding error on the parent span height will not
  // encroach on the ink of the viniculum. But that padding is not
  // included in the TeX-like `height` used for calculation of
  // vertical alignment. So texHeight = span.height < span.style.height.

  if (delim.type === "small") {
    // Get an SVG that is derived from glyph U+221A in font KaTeX-Main.
    // 1000 unit normal glyph height.
    viewBoxHeight = 1000 + 1000 * extraViniculum + vbPad;

    if (height < 1.0) {
      sizeMultiplier = 1.0; // mimic a \textfont radical
    } else if (height < 1.4) {
      sizeMultiplier = 0.7; // mimic a \scriptfont radical
    }

    spanHeight = (1.0 + extraViniculum + emPad) / sizeMultiplier;
    texHeight = (1.00 + extraViniculum) / sizeMultiplier;
    span = sqrtSvg("sqrtMain", spanHeight, viewBoxHeight, extraViniculum, options);
    span.style.minWidth = "0.853em";
    advanceWidth = 0.833 / sizeMultiplier; // from the font.
  } else if (delim.type === "large") {
    // These SVGs come from fonts: KaTeX_Size1, _Size2, etc.
    viewBoxHeight = (1000 + vbPad) * sizeToMaxHeight[delim.size];
    texHeight = (sizeToMaxHeight[delim.size] + extraViniculum) / sizeMultiplier;
    spanHeight = (sizeToMaxHeight[delim.size] + extraViniculum + emPad) / sizeMultiplier;
    span = sqrtSvg("sqrtSize" + delim.size, spanHeight, viewBoxHeight, extraViniculum, options);
    span.style.minWidth = "1.02em";
    advanceWidth = 1.0 / sizeMultiplier; // 1.0 from the font.
  } else {
    // Tall sqrt. In TeX, this would be stacked using multiple glyphs.
    // We'll use a single SVG to accomplish the same thing.
    spanHeight = height + extraViniculum + emPad;
    texHeight = height + extraViniculum;
    viewBoxHeight = Math.floor(1000 * height + extraViniculum) + vbPad;
    span = sqrtSvg("sqrtTall", spanHeight, viewBoxHeight, extraViniculum, options);
    span.style.minWidth = "0.742em";
    advanceWidth = 1.056;
  }

  span.height = texHeight;
  span.style.height = makeEm(spanHeight);
  return {
    span: span,
    advanceWidth: advanceWidth,
    // Calculate the actual line width.
    // This actually should depend on the chosen font -- e.g. \boldmath
    // should use the thicker surd symbols from e.g. KaTeX_Main-Bold, and
    // have thicker rules.
    ruleWidth: (options.fontMetrics().sqrtRuleThickness + extraViniculum) * sizeMultiplier
  };
}; // There are three kinds of delimiters, delimiters that stack when they become
// too large


var stackLargeDelimiters = ["(", "\\lparen", ")", "\\rparen", "[", "\\lbrack", "]", "\\rbrack", "\\{", "\\lbrace", "\\}", "\\rbrace", "\\lfloor", "\\rfloor", "\u230A", "\u230B", "\\lceil", "\\rceil", "\u2308", "\u2309", "\\surd"]; // delimiters that always stack

var stackAlwaysDelimiters = ["\\uparrow", "\\downarrow", "\\updownarrow", "\\Uparrow", "\\Downarrow", "\\Updownarrow", "|", "\\|", "\\vert", "\\Vert", "\\lvert", "\\rvert", "\\lVert", "\\rVert", "\\lgroup", "\\rgroup", "\u27EE", "\u27EF", "\\lmoustache", "\\rmoustache", "\u23B0", "\u23B1"]; // and delimiters that never stack

var stackNeverDelimiters = ["<", ">", "\\langle", "\\rangle", "/", "\\backslash", "\\lt", "\\gt"]; // Metrics of the different sizes. Found by looking at TeX's output of
// $\bigl| // \Bigl| \biggl| \Biggl| \showlists$
// Used to create stacked delimiters of appropriate sizes in makeSizedDelim.

var sizeToMaxHeight = [0, 1.2, 1.8, 2.4, 3.0];
/**
 * Used to create a delimiter of a specific size, where `size` is 1, 2, 3, or 4.
 */

var makeSizedDelim = function makeSizedDelim(delim, size, options, mode, classes) {
  // < and > turn into \langle and \rangle in delimiters
  if (delim === "<" || delim === "\\lt" || delim === "\u27E8") {
    delim = "\\langle";
  } else if (delim === ">" || delim === "\\gt" || delim === "\u27E9") {
    delim = "\\rangle";
  } // Sized delimiters are never centered.


  if (utils.contains(stackLargeDelimiters, delim) || utils.contains(stackNeverDelimiters, delim)) {
    return makeLargeDelim(delim, size, false, options, mode, classes);
  } else if (utils.contains(stackAlwaysDelimiters, delim)) {
    return makeStackedDelim(delim, sizeToMaxHeight[size], false, options, mode, classes);
  } else {
    throw new src_ParseError("Illegal delimiter: '" + delim + "'");
  }
};
/**
 * There are three different sequences of delimiter sizes that the delimiters
 * follow depending on the kind of delimiter. This is used when creating custom
 * sized delimiters to decide whether to create a small, large, or stacked
 * delimiter.
 *
 * In real TeX, these sequences aren't explicitly defined, but are instead
 * defined inside the font metrics. Since there are only three sequences that
 * are possible for the delimiters that TeX defines, it is easier to just encode
 * them explicitly here.
 */


// Delimiters that never stack try small delimiters and large delimiters only
var stackNeverDelimiterSequence = [{
  type: "small",
  style: src_Style.SCRIPTSCRIPT
}, {
  type: "small",
  style: src_Style.SCRIPT
}, {
  type: "small",
  style: src_Style.TEXT
}, {
  type: "large",
  size: 1
}, {
  type: "large",
  size: 2
}, {
  type: "large",
  size: 3
}, {
  type: "large",
  size: 4
}]; // Delimiters that always stack try the small delimiters first, then stack

var stackAlwaysDelimiterSequence = [{
  type: "small",
  style: src_Style.SCRIPTSCRIPT
}, {
  type: "small",
  style: src_Style.SCRIPT
}, {
  type: "small",
  style: src_Style.TEXT
}, {
  type: "stack"
}]; // Delimiters that stack when large try the small and then large delimiters, and
// stack afterwards

var stackLargeDelimiterSequence = [{
  type: "small",
  style: src_Style.SCRIPTSCRIPT
}, {
  type: "small",
  style: src_Style.SCRIPT
}, {
  type: "small",
  style: src_Style.TEXT
}, {
  type: "large",
  size: 1
}, {
  type: "large",
  size: 2
}, {
  type: "large",
  size: 3
}, {
  type: "large",
  size: 4
}, {
  type: "stack"
}];
/**
 * Get the font used in a delimiter based on what kind of delimiter it is.
 * TODO(#963) Use more specific font family return type once that is introduced.
 */

var delimTypeToFont = function delimTypeToFont(type) {
  if (type.type === "small") {
    return "Main-Regular";
  } else if (type.type === "large") {
    return "Size" + type.size + "-Regular";
  } else if (type.type === "stack") {
    return "Size4-Regular";
  } else {
    throw new Error("Add support for delim type '" + type.type + "' here.");
  }
};
/**
 * Traverse a sequence of types of delimiters to decide what kind of delimiter
 * should be used to create a delimiter of the given height+depth.
 */


var traverseSequence = function traverseSequence(delim, height, sequence, options) {
  // Here, we choose the index we should start at in the sequences. In smaller
  // sizes (which correspond to larger numbers in style.size) we start earlier
  // in the sequence. Thus, scriptscript starts at index 3-3=0, script starts
  // at index 3-2=1, text starts at 3-1=2, and display starts at min(2,3-0)=2
  var start = Math.min(2, 3 - options.style.size);

  for (var i = start; i < sequence.length; i++) {
    if (sequence[i].type === "stack") {
      // This is always the last delimiter, so we just break the loop now.
      break;
    }

    var metrics = getMetrics(delim, delimTypeToFont(sequence[i]), "math");
    var heightDepth = metrics.height + metrics.depth; // Small delimiters are scaled down versions of the same font, so we
    // account for the style change size.

    if (sequence[i].type === "small") {
      var newOptions = options.havingBaseStyle(sequence[i].style);
      heightDepth *= newOptions.sizeMultiplier;
    } // Check if the delimiter at this size works for the given height.


    if (heightDepth > height) {
      return sequence[i];
    }
  } // If we reached the end of the sequence, return the last sequence element.


  return sequence[sequence.length - 1];
};
/**
 * Make a delimiter of a given height+depth, with optional centering. Here, we
 * traverse the sequences, and create a delimiter that the sequence tells us to.
 */


var makeCustomSizedDelim = function makeCustomSizedDelim(delim, height, center, options, mode, classes) {
  if (delim === "<" || delim === "\\lt" || delim === "\u27E8") {
    delim = "\\langle";
  } else if (delim === ">" || delim === "\\gt" || delim === "\u27E9") {
    delim = "\\rangle";
  } // Decide what sequence to use


  var sequence;

  if (utils.contains(stackNeverDelimiters, delim)) {
    sequence = stackNeverDelimiterSequence;
  } else if (utils.contains(stackLargeDelimiters, delim)) {
    sequence = stackLargeDelimiterSequence;
  } else {
    sequence = stackAlwaysDelimiterSequence;
  } // Look through the sequence


  var delimType = traverseSequence(delim, height, sequence, options); // Get the delimiter from font glyphs.
  // Depending on the sequence element we decided on, call the
  // appropriate function.

  if (delimType.type === "small") {
    return makeSmallDelim(delim, delimType.style, center, options, mode, classes);
  } else if (delimType.type === "large") {
    return makeLargeDelim(delim, delimType.size, center, options, mode, classes);
  } else
    /* if (delimType.type === "stack") */
    {
      return makeStackedDelim(delim, height, center, options, mode, classes);
    }
};
/**
 * Make a delimiter for use with `\left` and `\right`, given a height and depth
 * of an expression that the delimiters surround.
 */


var makeLeftRightDelim = function makeLeftRightDelim(delim, height, depth, options, mode, classes) {
  // We always center \left/\right delimiters, so the axis is always shifted
  var axisHeight = options.fontMetrics().axisHeight * options.sizeMultiplier; // Taken from TeX source, tex.web, function make_left_right

  var delimiterFactor = 901;
  var delimiterExtend = 5.0 / options.fontMetrics().ptPerEm;
  var maxDistFromAxis = Math.max(height - axisHeight, depth + axisHeight);
  var totalHeight = Math.max( // In real TeX, calculations are done using integral values which are
  // 65536 per pt, or 655360 per em. So, the division here truncates in
  // TeX but doesn't here, producing different results. If we wanted to
  // exactly match TeX's calculation, we could do
  //   Math.floor(655360 * maxDistFromAxis / 500) *
  //    delimiterFactor / 655360
  // (To see the difference, compare
  //    x^{x^{\left(\rule{0.1em}{0.68em}\right)}}
  // in TeX and KaTeX)
  maxDistFromAxis / 500 * delimiterFactor, 2 * maxDistFromAxis - delimiterExtend); // Finally, we defer to `makeCustomSizedDelim` with our calculated total
  // height

  return makeCustomSizedDelim(delim, totalHeight, true, options, mode, classes);
};

/* harmony default export */ var delimiter = ({
  sqrtImage: makeSqrtImage,
  sizedDelim: makeSizedDelim,
  sizeToMaxHeight: sizeToMaxHeight,
  customSizedDelim: makeCustomSizedDelim,
  leftRightDelim: makeLeftRightDelim
});










// Extra data needed for the delimiter handler down below
var delimiterSizes = {
  "\\bigl": {
    mclass: "mopen",
    size: 1
  },
  "\\Bigl": {
    mclass: "mopen",
    size: 2
  },
  "\\biggl": {
    mclass: "mopen",
    size: 3
  },
  "\\Biggl": {
    mclass: "mopen",
    size: 4
  },
  "\\bigr": {
    mclass: "mclose",
    size: 1
  },
  "\\Bigr": {
    mclass: "mclose",
    size: 2
  },
  "\\biggr": {
    mclass: "mclose",
    size: 3
  },
  "\\Biggr": {
    mclass: "mclose",
    size: 4
  },
  "\\bigm": {
    mclass: "mrel",
    size: 1
  },
  "\\Bigm": {
    mclass: "mrel",
    size: 2
  },
  "\\biggm": {
    mclass: "mrel",
    size: 3
  },
  "\\Biggm": {
    mclass: "mrel",
    size: 4
  },
  "\\big": {
    mclass: "mord",
    size: 1
  },
  "\\Big": {
    mclass: "mord",
    size: 2
  },
  "\\bigg": {
    mclass: "mord",
    size: 3
  },
  "\\Bigg": {
    mclass: "mord",
    size: 4
  }
};
var delimiters = ["(", "\\lparen", ")", "\\rparen", "[", "\\lbrack", "]", "\\rbrack", "\\{", "\\lbrace", "\\}", "\\rbrace", "\\lfloor", "\\rfloor", "\u230A", "\u230B", "\\lceil", "\\rceil", "\u2308", "\u2309", "<", ">", "\\langle", "\u27E8", "\\rangle", "\u27E9", "\\lt", "\\gt", "\\lvert", "\\rvert", "\\lVert", "\\rVert", "\\lgroup", "\\rgroup", "\u27EE", "\u27EF", "\\lmoustache", "\\rmoustache", "\u23B0", "\u23B1", "/", "\\backslash", "|", "\\vert", "\\|", "\\Vert", "\\uparrow", "\\Uparrow", "\\downarrow", "\\Downarrow", "\\updownarrow", "\\Updownarrow", "."];

// Delimiter functions
function checkDelimiter(delim, context) {
  var symDelim = checkSymbolNodeType(delim);

  if (symDelim && utils.contains(delimiters, symDelim.text)) {
    return symDelim;
  } else if (symDelim) {
    throw new src_ParseError("Invalid delimiter '" + symDelim.text + "' after '" + context.funcName + "'", delim);
  } else {
    throw new src_ParseError("Invalid delimiter type '" + delim.type + "'", delim);
  }
}

defineFunction({
  type: "delimsizing",
  names: ["\\bigl", "\\Bigl", "\\biggl", "\\Biggl", "\\bigr", "\\Bigr", "\\biggr", "\\Biggr", "\\bigm", "\\Bigm", "\\biggm", "\\Biggm", "\\big", "\\Big", "\\bigg", "\\Bigg"],
  props: {
    numArgs: 1,
    argTypes: ["primitive"]
  },
  handler: function handler(context, args) {
    var delim = checkDelimiter(args[0], context);
    return {
      type: "delimsizing",
      mode: context.parser.mode,
      size: delimiterSizes[context.funcName].size,
      mclass: delimiterSizes[context.funcName].mclass,
      delim: delim.text
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    if (group.delim === ".") {
      // Empty delimiters still count as elements, even though they don't
      // show anything.
      return buildCommon.makeSpan([group.mclass]);
    } // Use delimiter.sizedDelim to generate the delimiter.


    return delimiter.sizedDelim(group.delim, group.size, options, group.mode, [group.mclass]);
  },
  mathmlBuilder: function mathmlBuilder(group) {
    var children = [];

    if (group.delim !== ".") {
      children.push(makeText(group.delim, group.mode));
    }

    var node = new mathMLTree.MathNode("mo", children);

    if (group.mclass === "mopen" || group.mclass === "mclose") {
      // Only some of the delimsizing functions act as fences, and they
      // return "mopen" or "mclose" mclass.
      node.setAttribute("fence", "true");
    } else {
      // Explicitly disable fencing if it's not a fence, to override the
      // defaults.
      node.setAttribute("fence", "false");
    }

    node.setAttribute("stretchy", "true");
    var size = makeEm(delimiter.sizeToMaxHeight[group.size]);
    node.setAttribute("minsize", size);
    node.setAttribute("maxsize", size);
    return node;
  }
});

function assertParsed(group) {
  if (!group.body) {
    throw new Error("Bug: The leftright ParseNode wasn't fully parsed.");
  }
}

defineFunction({
  type: "leftright-right",
  names: ["\\right"],
  props: {
    numArgs: 1,
    primitive: true
  },
  handler: function handler(context, args) {
    // \left case below triggers parsing of \right in
    //   `const right = parser.parseFunction();`
    // uses this return value.
    var color = context.parser.gullet.macros.get("\\current@color");

    if (color && typeof color !== "string") {
      throw new src_ParseError("\\current@color set to non-string in \\right");
    }

    return {
      type: "leftright-right",
      mode: context.parser.mode,
      delim: checkDelimiter(args[0], context).text,
      color: color // undefined if not set via \color

    };
  }
});
defineFunction({
  type: "leftright",
  names: ["\\left"],
  props: {
    numArgs: 1,
    primitive: true
  },
  handler: function handler(context, args) {
    var delim = checkDelimiter(args[0], context);
    var parser = context.parser; // Parse out the implicit body

    ++parser.leftrightDepth; // parseExpression stops before '\\right'

    var body = parser.parseExpression(false);
    --parser.leftrightDepth; // Check the next token

    parser.expect("\\right", false);
    var right = assertNodeType(parser.parseFunction(), "leftright-right");
    return {
      type: "leftright",
      mode: parser.mode,
      body: body,
      left: delim.text,
      right: right.delim,
      rightColor: right.color
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    assertParsed(group); // Build the inner expression

    var inner = buildExpression(group.body, options, true, ["mopen", "mclose"]);
    var innerHeight = 0;
    var innerDepth = 0;
    var hadMiddle = false; // Calculate its height and depth

    for (var i = 0; i < inner.length; i++) {
      // Property `isMiddle` not defined on `span`. See comment in
      // "middle"'s htmlBuilder.
      // $FlowFixMe
      if (inner[i].isMiddle) {
        hadMiddle = true;
      } else {
        innerHeight = Math.max(inner[i].height, innerHeight);
        innerDepth = Math.max(inner[i].depth, innerDepth);
      }
    } // The size of delimiters is the same, regardless of what style we are
    // in. Thus, to correctly calculate the size of delimiter we need around
    // a group, we scale down the inner size based on the size.


    innerHeight *= options.sizeMultiplier;
    innerDepth *= options.sizeMultiplier;
    var leftDelim;

    if (group.left === ".") {
      // Empty delimiters in \left and \right make null delimiter spaces.
      leftDelim = makeNullDelimiter(options, ["mopen"]);
    } else {
      // Otherwise, use leftRightDelim to generate the correct sized
      // delimiter.
      leftDelim = delimiter.leftRightDelim(group.left, innerHeight, innerDepth, options, group.mode, ["mopen"]);
    } // Add it to the beginning of the expression


    inner.unshift(leftDelim); // Handle middle delimiters

    if (hadMiddle) {
      for (var _i = 1; _i < inner.length; _i++) {
        var middleDelim = inner[_i]; // Property `isMiddle` not defined on `span`. See comment in
        // "middle"'s htmlBuilder.
        // $FlowFixMe

        var isMiddle = middleDelim.isMiddle;

        if (isMiddle) {
          // Apply the options that were active when \middle was called
          inner[_i] = delimiter.leftRightDelim(isMiddle.delim, innerHeight, innerDepth, isMiddle.options, group.mode, []);
        }
      }
    }

    var rightDelim; // Same for the right delimiter, but using color specified by \color

    if (group.right === ".") {
      rightDelim = makeNullDelimiter(options, ["mclose"]);
    } else {
      var colorOptions = group.rightColor ? options.withColor(group.rightColor) : options;
      rightDelim = delimiter.leftRightDelim(group.right, innerHeight, innerDepth, colorOptions, group.mode, ["mclose"]);
    } // Add it to the end of the expression.


    inner.push(rightDelim);
    return buildCommon.makeSpan(["minner"], inner, options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    assertParsed(group);
    var inner = buildMathML_buildExpression(group.body, options);

    if (group.left !== ".") {
      var leftNode = new mathMLTree.MathNode("mo", [makeText(group.left, group.mode)]);
      leftNode.setAttribute("fence", "true");
      inner.unshift(leftNode);
    }

    if (group.right !== ".") {
      var rightNode = new mathMLTree.MathNode("mo", [makeText(group.right, group.mode)]);
      rightNode.setAttribute("fence", "true");

      if (group.rightColor) {
        rightNode.setAttribute("mathcolor", group.rightColor);
      }

      inner.push(rightNode);
    }

    return makeRow(inner);
  }
});
defineFunction({
  type: "middle",
  names: ["\\middle"],
  props: {
    numArgs: 1,
    primitive: true
  },
  handler: function handler(context, args) {
    var delim = checkDelimiter(args[0], context);

    if (!context.parser.leftrightDepth) {
      throw new src_ParseError("\\middle without preceding \\left", delim);
    }

    return {
      type: "middle",
      mode: context.parser.mode,
      delim: delim.text
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var middleDelim;

    if (group.delim === ".") {
      middleDelim = makeNullDelimiter(options, []);
    } else {
      middleDelim = delimiter.sizedDelim(group.delim, 1, options, group.mode, []);
      var isMiddle = {
        delim: group.delim,
        options: options
      }; // Property `isMiddle` not defined on `span`. It is only used in
      // this file above.
      // TODO: Fix this violation of the `span` type and possibly rename
      // things since `isMiddle` sounds like a boolean, but is a struct.
      // $FlowFixMe

      middleDelim.isMiddle = isMiddle;
    }

    return middleDelim;
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    // A Firefox \middle will strech a character vertically only if it
    // is in the fence part of the operator dictionary at:
    // https://www.w3.org/TR/MathML3/appendixc.html.
    // So we need to avoid U+2223 and use plain "|" instead.
    var textNode = group.delim === "\\vert" || group.delim === "|" ? makeText("|", "text") : makeText(group.delim, group.mode);
    var middleNode = new mathMLTree.MathNode("mo", [textNode]);
    middleNode.setAttribute("fence", "true"); // MathML gives 5/18em spacing to each <mo> element.
    // \middle should get delimiter spacing instead.

    middleNode.setAttribute("lspace", "0.05em");
    middleNode.setAttribute("rspace", "0.05em");
    return middleNode;
  }
});












var enclose_htmlBuilder = function htmlBuilder(group, options) {
  // \cancel, \bcancel, \xcancel, \sout, \fbox, \colorbox, \fcolorbox, \phase
  // Some groups can return document fragments.  Handle those by wrapping
  // them in a span.
  var inner = buildCommon.wrapFragment(buildGroup(group.body, options), options);
  var label = group.label.substr(1);
  var scale = options.sizeMultiplier;
  var img;
  var imgShift = 0; // In the LaTeX cancel package, line geometry is slightly different
  // depending on whether the subject is wider than it is tall, or vice versa.
  // We don't know the width of a group, so as a proxy, we test if
  // the subject is a single character. This captures most of the
  // subjects that should get the "tall" treatment.

  var isSingleChar = utils.isCharacterBox(group.body);

  if (label === "sout") {
    img = buildCommon.makeSpan(["stretchy", "sout"]);
    img.height = options.fontMetrics().defaultRuleThickness / scale;
    imgShift = -0.5 * options.fontMetrics().xHeight;
  } else if (label === "phase") {
    // Set a couple of dimensions from the steinmetz package.
    var lineWeight = calculateSize({
      number: 0.6,
      unit: "pt"
    }, options);
    var clearance = calculateSize({
      number: 0.35,
      unit: "ex"
    }, options); // Prevent size changes like \Huge from affecting line thickness

    var newOptions = options.havingBaseSizing();
    scale = scale / newOptions.sizeMultiplier;
    var angleHeight = inner.height + inner.depth + lineWeight + clearance; // Reserve a left pad for the angle.

    inner.style.paddingLeft = makeEm(angleHeight / 2 + lineWeight); // Create an SVG

    var viewBoxHeight = Math.floor(1000 * angleHeight * scale);
    var path = phasePath(viewBoxHeight);
    var svgNode = new SvgNode([new PathNode("phase", path)], {
      "width": "400em",
      "height": makeEm(viewBoxHeight / 1000),
      "viewBox": "0 0 400000 " + viewBoxHeight,
      "preserveAspectRatio": "xMinYMin slice"
    }); // Wrap it in a span with overflow: hidden.

    img = buildCommon.makeSvgSpan(["hide-tail"], [svgNode], options);
    img.style.height = makeEm(angleHeight);
    imgShift = inner.depth + lineWeight + clearance;
  } else {
    // Add horizontal padding
    if (/cancel/.test(label)) {
      if (!isSingleChar) {
        inner.classes.push("cancel-pad");
      }
    } else if (label === "angl") {
      inner.classes.push("anglpad");
    } else {
      inner.classes.push("boxpad");
    } // Add vertical padding


    var topPad = 0;
    var bottomPad = 0;
    var ruleThickness = 0; // ref: cancel package: \advance\totalheight2\p@ % "+2"

    if (/box/.test(label)) {
      ruleThickness = Math.max(options.fontMetrics().fboxrule, // default
      options.minRuleThickness // User override.
      );
      topPad = options.fontMetrics().fboxsep + (label === "colorbox" ? 0 : ruleThickness);
      bottomPad = topPad;
    } else if (label === "angl") {
      ruleThickness = Math.max(options.fontMetrics().defaultRuleThickness, options.minRuleThickness);
      topPad = 4 * ruleThickness; // gap = 3 × line, plus the line itself.

      bottomPad = Math.max(0, 0.25 - inner.depth);
    } else {
      topPad = isSingleChar ? 0.2 : 0;
      bottomPad = topPad;
    }

    img = stretchy.encloseSpan(inner, label, topPad, bottomPad, options);

    if (/fbox|boxed|fcolorbox/.test(label)) {
      img.style.borderStyle = "solid";
      img.style.borderWidth = makeEm(ruleThickness);
    } else if (label === "angl" && ruleThickness !== 0.049) {
      img.style.borderTopWidth = makeEm(ruleThickness);
      img.style.borderRightWidth = makeEm(ruleThickness);
    }

    imgShift = inner.depth + bottomPad;

    if (group.backgroundColor) {
      img.style.backgroundColor = group.backgroundColor;

      if (group.borderColor) {
        img.style.borderColor = group.borderColor;
      }
    }
  }

  var vlist;

  if (group.backgroundColor) {
    vlist = buildCommon.makeVList({
      positionType: "individualShift",
      children: [// Put the color background behind inner;
      {
        type: "elem",
        elem: img,
        shift: imgShift
      }, {
        type: "elem",
        elem: inner,
        shift: 0
      }]
    }, options);
  } else {
    var classes = /cancel|phase/.test(label) ? ["svg-align"] : [];
    vlist = buildCommon.makeVList({
      positionType: "individualShift",
      children: [// Write the \cancel stroke on top of inner.
      {
        type: "elem",
        elem: inner,
        shift: 0
      }, {
        type: "elem",
        elem: img,
        shift: imgShift,
        wrapperClasses: classes
      }]
    }, options);
  }

  if (/cancel/.test(label)) {
    // The cancel package documentation says that cancel lines add their height
    // to the expression, but tests show that isn't how it actually works.
    vlist.height = inner.height;
    vlist.depth = inner.depth;
  }

  if (/cancel/.test(label) && !isSingleChar) {
    // cancel does not create horiz space for its line extension.
    return buildCommon.makeSpan(["mord", "cancel-lap"], [vlist], options);
  } else {
    return buildCommon.makeSpan(["mord"], [vlist], options);
  }
};

var enclose_mathmlBuilder = function mathmlBuilder(group, options) {
  var fboxsep = 0;
  var node = new mathMLTree.MathNode(group.label.indexOf("colorbox") > -1 ? "mpadded" : "menclose", [buildMathML_buildGroup(group.body, options)]);

  switch (group.label) {
    case "\\cancel":
      node.setAttribute("notation", "updiagonalstrike");
      break;

    case "\\bcancel":
      node.setAttribute("notation", "downdiagonalstrike");
      break;

    case "\\phase":
      node.setAttribute("notation", "phasorangle");
      break;

    case "\\sout":
      node.setAttribute("notation", "horizontalstrike");
      break;

    case "\\fbox":
      node.setAttribute("notation", "box");
      break;

    case "\\angl":
      node.setAttribute("notation", "actuarial");
      break;

    case "\\fcolorbox":
    case "\\colorbox":
      // <menclose> doesn't have a good notation option. So use <mpadded>
      // instead. Set some attributes that come included with <menclose>.
      fboxsep = options.fontMetrics().fboxsep * options.fontMetrics().ptPerEm;
      node.setAttribute("width", "+" + 2 * fboxsep + "pt");
      node.setAttribute("height", "+" + 2 * fboxsep + "pt");
      node.setAttribute("lspace", fboxsep + "pt"); //

      node.setAttribute("voffset", fboxsep + "pt");

      if (group.label === "\\fcolorbox") {
        var thk = Math.max(options.fontMetrics().fboxrule, // default
        options.minRuleThickness // user override
        );
        node.setAttribute("style", "border: " + thk + "em solid " + String(group.borderColor));
      }

      break;

    case "\\xcancel":
      node.setAttribute("notation", "updiagonalstrike downdiagonalstrike");
      break;
  }

  if (group.backgroundColor) {
    node.setAttribute("mathbackground", group.backgroundColor);
  }

  return node;
};

defineFunction({
  type: "enclose",
  names: ["\\colorbox"],
  props: {
    numArgs: 2,
    allowedInText: true,
    argTypes: ["color", "text"]
  },
  handler: function handler(_ref, args, optArgs) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var color = assertNodeType(args[0], "color-token").color;
    var body = args[1];
    return {
      type: "enclose",
      mode: parser.mode,
      label: funcName,
      backgroundColor: color,
      body: body
    };
  },
  htmlBuilder: enclose_htmlBuilder,
  mathmlBuilder: enclose_mathmlBuilder
});
defineFunction({
  type: "enclose",
  names: ["\\fcolorbox"],
  props: {
    numArgs: 3,
    allowedInText: true,
    argTypes: ["color", "color", "text"]
  },
  handler: function handler(_ref2, args, optArgs) {
    var parser = _ref2.parser,
        funcName = _ref2.funcName;
    var borderColor = assertNodeType(args[0], "color-token").color;
    var backgroundColor = assertNodeType(args[1], "color-token").color;
    var body = args[2];
    return {
      type: "enclose",
      mode: parser.mode,
      label: funcName,
      backgroundColor: backgroundColor,
      borderColor: borderColor,
      body: body
    };
  },
  htmlBuilder: enclose_htmlBuilder,
  mathmlBuilder: enclose_mathmlBuilder
});
defineFunction({
  type: "enclose",
  names: ["\\fbox"],
  props: {
    numArgs: 1,
    argTypes: ["hbox"],
    allowedInText: true
  },
  handler: function handler(_ref3, args) {
    var parser = _ref3.parser;
    return {
      type: "enclose",
      mode: parser.mode,
      label: "\\fbox",
      body: args[0]
    };
  }
});
defineFunction({
  type: "enclose",
  names: ["\\cancel", "\\bcancel", "\\xcancel", "\\sout", "\\phase"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref4, args) {
    var parser = _ref4.parser,
        funcName = _ref4.funcName;
    var body = args[0];
    return {
      type: "enclose",
      mode: parser.mode,
      label: funcName,
      body: body
    };
  },
  htmlBuilder: enclose_htmlBuilder,
  mathmlBuilder: enclose_mathmlBuilder
});
defineFunction({
  type: "enclose",
  names: ["\\angl"],
  props: {
    numArgs: 1,
    argTypes: ["hbox"],
    allowedInText: false
  },
  handler: function handler(_ref5, args) {
    var parser = _ref5.parser;
    return {
      type: "enclose",
      mode: parser.mode,
      label: "\\angl",
      body: args[0]
    };
  }
});


/**
 * All registered environments.
 * `environments.js` exports this same dictionary again and makes it public.
 * `Parser.js` requires this dictionary via `environments.js`.
 */
var _environments = {};
function defineEnvironment(_ref) {
  var type = _ref.type,
      names = _ref.names,
      props = _ref.props,
      handler = _ref.handler,
      htmlBuilder = _ref.htmlBuilder,
      mathmlBuilder = _ref.mathmlBuilder;
  // Set default values of environments.
  var data = {
    type: type,
    numArgs: props.numArgs || 0,
    allowedInText: false,
    numOptionalArgs: 0,
    handler: handler
  };

  for (var i = 0; i < names.length; ++i) {
    // TODO: The value type of _environments should be a type union of all
    // possible `EnvSpec<>` possibilities instead of `EnvSpec<*>`, which is
    // an existential type.
    _environments[names[i]] = data;
  }

  if (htmlBuilder) {
    _htmlGroupBuilders[type] = htmlBuilder;
  }

  if (mathmlBuilder) {
    _mathmlGroupBuilders[type] = mathmlBuilder;
  }
}














// Helper functions
function getHLines(parser) {
  // Return an array. The array length = number of hlines.
  // Each element in the array tells if the line is dashed.
  var hlineInfo = [];
  parser.consumeSpaces();
  var nxt = parser.fetch().text;

  while (nxt === "\\hline" || nxt === "\\hdashline") {
    parser.consume();
    hlineInfo.push(nxt === "\\hdashline");
    parser.consumeSpaces();
    nxt = parser.fetch().text;
  }

  return hlineInfo;
}

var validateAmsEnvironmentContext = function validateAmsEnvironmentContext(context) {
  var settings = context.parser.settings;

  if (!settings.displayMode) {
    throw new src_ParseError("{" + context.envName + "} can be used only in" + " display mode.");
  }
};
/**
 * Parse the body of the environment, with rows delimited by \\ and
 * columns delimited by &, and create a nested list in row-major order
 * with one group per cell.  If given an optional argument style
 * ("text", "display", etc.), then each cell is cast into that style.
 */


function parseArray(parser, _ref, style) {
  var hskipBeforeAndAfter = _ref.hskipBeforeAndAfter,
      addJot = _ref.addJot,
      cols = _ref.cols,
      arraystretch = _ref.arraystretch,
      colSeparationType = _ref.colSeparationType,
      addEqnNum = _ref.addEqnNum,
      singleRow = _ref.singleRow,
      emptySingleRow = _ref.emptySingleRow,
      maxNumCols = _ref.maxNumCols,
      leqno = _ref.leqno;
  parser.gullet.beginGroup();

  if (!singleRow) {
    // \cr is equivalent to \\ without the optional size argument (see below)
    // TODO: provide helpful error when \cr is used outside array environment
    parser.gullet.macros.set("\\cr", "\\\\\\relax");
  } // Get current arraystretch if it's not set by the environment


  if (!arraystretch) {
    var stretch = parser.gullet.expandMacroAsText("\\arraystretch");

    if (stretch == null) {
      // Default \arraystretch from lttab.dtx
      arraystretch = 1;
    } else {
      arraystretch = parseFloat(stretch);

      if (!arraystretch || arraystretch < 0) {
        throw new src_ParseError("Invalid \\arraystretch: " + stretch);
      }
    }
  } // Start group for first cell


  parser.gullet.beginGroup();
  var row = [];
  var body = [row];
  var rowGaps = [];
  var hLinesBeforeRow = []; // Test for \hline at the top of the array.

  hLinesBeforeRow.push(getHLines(parser));

  while (true) {
    // eslint-disable-line no-constant-condition
    // Parse each cell in its own group (namespace)
    var cell = parser.parseExpression(false, singleRow ? "\\end" : "\\\\");
    parser.gullet.endGroup();
    parser.gullet.beginGroup();
    cell = {
      type: "ordgroup",
      mode: parser.mode,
      body: cell
    };

    if (style) {
      cell = {
        type: "styling",
        mode: parser.mode,
        style: style,
        body: [cell]
      };
    }

    row.push(cell);
    var next = parser.fetch().text;

    if (next === "&") {
      if (maxNumCols && row.length === maxNumCols) {
        if (singleRow || colSeparationType) {
          // {equation} or {split}
          throw new src_ParseError("Too many tab characters: &", parser.nextToken);
        } else {
          // {array} environment
          parser.settings.reportNonstrict("textEnv", "Too few columns " + "specified in the {array} column argument.");
        }
      }

      parser.consume();
    } else if (next === "\\end") {
      // Arrays terminate newlines with `\crcr` which consumes a `\cr` if
      // the last line is empty.  However, AMS environments keep the
      // empty row if it's the only one.
      // NOTE: Currently, `cell` is the last item added into `row`.
      if (row.length === 1 && cell.type === "styling" && cell.body[0].body.length === 0 && (body.length > 1 || !emptySingleRow)) {
        body.pop();
      }

      if (hLinesBeforeRow.length < body.length + 1) {
        hLinesBeforeRow.push([]);
      }

      break;
    } else if (next === "\\\\") {
      parser.consume();
      var size = void 0; // \def\Let@{\let\\\math@cr}
      // \def\math@cr{...\math@cr@}
      // \def\math@cr@{\new@ifnextchar[\math@cr@@{\math@cr@@[\z@]}}
      // \def\math@cr@@[#1]{...\math@cr@@@...}
      // \def\math@cr@@@{\cr}

      if (parser.gullet.future().text !== " ") {
        size = parser.parseSizeGroup(true);
      }

      rowGaps.push(size ? size.value : null); // check for \hline(s) following the row separator

      hLinesBeforeRow.push(getHLines(parser));
      row = [];
      body.push(row);
    } else {
      throw new src_ParseError("Expected & or \\\\ or \\cr or \\end", parser.nextToken);
    }
  } // End cell group


  parser.gullet.endGroup(); // End array group defining \cr

  parser.gullet.endGroup();
  return {
    type: "array",
    mode: parser.mode,
    addJot: addJot,
    arraystretch: arraystretch,
    body: body,
    cols: cols,
    rowGaps: rowGaps,
    hskipBeforeAndAfter: hskipBeforeAndAfter,
    hLinesBeforeRow: hLinesBeforeRow,
    colSeparationType: colSeparationType,
    addEqnNum: addEqnNum,
    leqno: leqno
  };
} // Decides on a style for cells in an array according to whether the given
// environment name starts with the letter 'd'.


function dCellStyle(envName) {
  if (envName.substr(0, 1) === "d") {
    return "display";
  } else {
    return "text";
  }
}

var array_htmlBuilder = function htmlBuilder(group, options) {
  var r;
  var c;
  var nr = group.body.length;
  var hLinesBeforeRow = group.hLinesBeforeRow;
  var nc = 0;
  var body = new Array(nr);
  var hlines = [];
  var ruleThickness = Math.max( // From LaTeX \showthe\arrayrulewidth. Equals 0.04 em.
  options.fontMetrics().arrayRuleWidth, options.minRuleThickness // User override.
  ); // Horizontal spacing

  var pt = 1 / options.fontMetrics().ptPerEm;
  var arraycolsep = 5 * pt; // default value, i.e. \arraycolsep in article.cls

  if (group.colSeparationType && group.colSeparationType === "small") {
    // We're in a {smallmatrix}. Default column space is \thickspace,
    // i.e. 5/18em = 0.2778em, per amsmath.dtx for {smallmatrix}.
    // But that needs adjustment because LaTeX applies \scriptstyle to the
    // entire array, including the colspace, but this function applies
    // \scriptstyle only inside each element.
    var localMultiplier = options.havingStyle(src_Style.SCRIPT).sizeMultiplier;
    arraycolsep = 0.2778 * (localMultiplier / options.sizeMultiplier);
  } // Vertical spacing


  var baselineskip = group.colSeparationType === "CD" ? calculateSize({
    number: 3,
    unit: "ex"
  }, options) : 12 * pt; // see size10.clo
  // Default \jot from ltmath.dtx
  // TODO(edemaine): allow overriding \jot via \setlength (#687)

  var jot = 3 * pt;
  var arrayskip = group.arraystretch * baselineskip;
  var arstrutHeight = 0.7 * arrayskip; // \strutbox in ltfsstrc.dtx and

  var arstrutDepth = 0.3 * arrayskip; // \@arstrutbox in lttab.dtx

  var totalHeight = 0; // Set a position for \hline(s) at the top of the array, if any.

  function setHLinePos(hlinesInGap) {
    for (var i = 0; i < hlinesInGap.length; ++i) {
      if (i > 0) {
        totalHeight += 0.25;
      }

      hlines.push({
        pos: totalHeight,
        isDashed: hlinesInGap[i]
      });
    }
  }

  setHLinePos(hLinesBeforeRow[0]);

  for (r = 0; r < group.body.length; ++r) {
    var inrow = group.body[r];
    var height = arstrutHeight; // \@array adds an \@arstrut

    var depth = arstrutDepth; // to each tow (via the template)

    if (nc < inrow.length) {
      nc = inrow.length;
    }

    var outrow = new Array(inrow.length);

    for (c = 0; c < inrow.length; ++c) {
      var elt = buildGroup(inrow[c], options);

      if (depth < elt.depth) {
        depth = elt.depth;
      }

      if (height < elt.height) {
        height = elt.height;
      }

      outrow[c] = elt;
    }

    var rowGap = group.rowGaps[r];
    var gap = 0;

    if (rowGap) {
      gap = calculateSize(rowGap, options);

      if (gap > 0) {
        // \@argarraycr
        gap += arstrutDepth;

        if (depth < gap) {
          depth = gap; // \@xargarraycr
        }

        gap = 0;
      }
    } // In AMS multiline environments such as aligned and gathered, rows
    // correspond to lines that have additional \jot added to the
    // \baselineskip via \openup.


    if (group.addJot) {
      depth += jot;
    }

    outrow.height = height;
    outrow.depth = depth;
    totalHeight += height;
    outrow.pos = totalHeight;
    totalHeight += depth + gap; // \@yargarraycr

    body[r] = outrow; // Set a position for \hline(s), if any.

    setHLinePos(hLinesBeforeRow[r + 1]);
  }

  var offset = totalHeight / 2 + options.fontMetrics().axisHeight;
  var colDescriptions = group.cols || [];
  var cols = [];
  var colSep;
  var colDescrNum;
  var eqnNumSpans = [];

  if (group.addEqnNum) {
    // An environment with automatic equation numbers.
    // Create node(s) that will trigger CSS counter increment.
    for (r = 0; r < nr; ++r) {
      var rw = body[r];
      var shift = rw.pos - offset;
      var eqnTag = buildCommon.makeSpan(["eqn-num"], [], options);
      eqnTag.depth = rw.depth;
      eqnTag.height = rw.height;
      eqnNumSpans.push({
        type: "elem",
        elem: eqnTag,
        shift: shift
      });
    }
  }

  for (c = 0, colDescrNum = 0; // Continue while either there are more columns or more column
  // descriptions, so trailing separators don't get lost.
  c < nc || colDescrNum < colDescriptions.length; ++c, ++colDescrNum) {
    var colDescr = colDescriptions[colDescrNum] || {};
    var firstSeparator = true;

    while (colDescr.type === "separator") {
      // If there is more than one separator in a row, add a space
      // between them.
      if (!firstSeparator) {
        colSep = buildCommon.makeSpan(["arraycolsep"], []);
        colSep.style.width = makeEm(options.fontMetrics().doubleRuleSep);
        cols.push(colSep);
      }

      if (colDescr.separator === "|" || colDescr.separator === ":") {
        var lineType = colDescr.separator === "|" ? "solid" : "dashed";
        var separator = buildCommon.makeSpan(["vertical-separator"], [], options);
        separator.style.height = makeEm(totalHeight);
        separator.style.borderRightWidth = makeEm(ruleThickness);
        separator.style.borderRightStyle = lineType;
        separator.style.margin = "0 " + makeEm(-ruleThickness / 2);

        var _shift = totalHeight - offset;

        if (_shift) {
          separator.style.verticalAlign = makeEm(-_shift);
        }

        cols.push(separator);
      } else {
        throw new src_ParseError("Invalid separator type: " + colDescr.separator);
      }

      colDescrNum++;
      colDescr = colDescriptions[colDescrNum] || {};
      firstSeparator = false;
    }

    if (c >= nc) {
      continue;
    }

    var sepwidth = void 0;

    if (c > 0 || group.hskipBeforeAndAfter) {
      sepwidth = utils.deflt(colDescr.pregap, arraycolsep);

      if (sepwidth !== 0) {
        colSep = buildCommon.makeSpan(["arraycolsep"], []);
        colSep.style.width = makeEm(sepwidth);
        cols.push(colSep);
      }
    }

    var col = [];

    for (r = 0; r < nr; ++r) {
      var row = body[r];
      var elem = row[c];

      if (!elem) {
        continue;
      }

      var _shift2 = row.pos - offset;

      elem.depth = row.depth;
      elem.height = row.height;
      col.push({
        type: "elem",
        elem: elem,
        shift: _shift2
      });
    }

    col = buildCommon.makeVList({
      positionType: "individualShift",
      children: col
    }, options);
    col = buildCommon.makeSpan(["col-align-" + (colDescr.align || "c")], [col]);
    cols.push(col);

    if (c < nc - 1 || group.hskipBeforeAndAfter) {
      sepwidth = utils.deflt(colDescr.postgap, arraycolsep);

      if (sepwidth !== 0) {
        colSep = buildCommon.makeSpan(["arraycolsep"], []);
        colSep.style.width = makeEm(sepwidth);
        cols.push(colSep);
      }
    }
  }

  body = buildCommon.makeSpan(["mtable"], cols); // Add \hline(s), if any.

  if (hlines.length > 0) {
    var line = buildCommon.makeLineSpan("hline", options, ruleThickness);
    var dashes = buildCommon.makeLineSpan("hdashline", options, ruleThickness);
    var vListElems = [{
      type: "elem",
      elem: body,
      shift: 0
    }];

    while (hlines.length > 0) {
      var hline = hlines.pop();
      var lineShift = hline.pos - offset;

      if (hline.isDashed) {
        vListElems.push({
          type: "elem",
          elem: dashes,
          shift: lineShift
        });
      } else {
        vListElems.push({
          type: "elem",
          elem: line,
          shift: lineShift
        });
      }
    }

    body = buildCommon.makeVList({
      positionType: "individualShift",
      children: vListElems
    }, options);
  }

  if (!group.addEqnNum) {
    return buildCommon.makeSpan(["mord"], [body], options);
  } else {
    var eqnNumCol = buildCommon.makeVList({
      positionType: "individualShift",
      children: eqnNumSpans
    }, options);
    eqnNumCol = buildCommon.makeSpan(["tag"], [eqnNumCol], options);
    return buildCommon.makeFragment([body, eqnNumCol]);
  }
};

var alignMap = {
  c: "center ",
  l: "left ",
  r: "right "
};

var array_mathmlBuilder = function mathmlBuilder(group, options) {
  var tbl = [];
  var glue = new mathMLTree.MathNode("mtd", [], ["mtr-glue"]);
  var tag = new mathMLTree.MathNode("mtd", [], ["mml-eqn-num"]);

  for (var i = 0; i < group.body.length; i++) {
    var rw = group.body[i];
    var row = [];

    for (var j = 0; j < rw.length; j++) {
      row.push(new mathMLTree.MathNode("mtd", [buildMathML_buildGroup(rw[j], options)]));
    }

    if (group.addEqnNum) {
      row.unshift(glue);
      row.push(glue);

      if (group.leqno) {
        row.unshift(tag);
      } else {
        row.push(tag);
      }
    }

    tbl.push(new mathMLTree.MathNode("mtr", row));
  }

  var table = new mathMLTree.MathNode("mtable", tbl); // Set column alignment, row spacing, column spacing, and
  // array lines by setting attributes on the table element.
  // Set the row spacing. In MathML, we specify a gap distance.
  // We do not use rowGap[] because MathML automatically increases
  // cell height with the height/depth of the element content.
  // LaTeX \arraystretch multiplies the row baseline-to-baseline distance.
  // We simulate this by adding (arraystretch - 1)em to the gap. This
  // does a reasonable job of adjusting arrays containing 1 em tall content.
  // The 0.16 and 0.09 values are found emprically. They produce an array
  // similar to LaTeX and in which content does not interfere with \hines.

  var gap = group.arraystretch === 0.5 ? 0.1 // {smallmatrix}, {subarray}
  : 0.16 + group.arraystretch - 1 + (group.addJot ? 0.09 : 0);
  table.setAttribute("rowspacing", makeEm(gap)); // MathML table lines go only between cells.
  // To place a line on an edge we'll use <menclose>, if necessary.

  var menclose = "";
  var align = "";

  if (group.cols && group.cols.length > 0) {
    // Find column alignment, column spacing, and  vertical lines.
    var cols = group.cols;
    var columnLines = "";
    var prevTypeWasAlign = false;
    var iStart = 0;
    var iEnd = cols.length;

    if (cols[0].type === "separator") {
      menclose += "top ";
      iStart = 1;
    }

    if (cols[cols.length - 1].type === "separator") {
      menclose += "bottom ";
      iEnd -= 1;
    }

    for (var _i = iStart; _i < iEnd; _i++) {
      if (cols[_i].type === "align") {
        align += alignMap[cols[_i].align];

        if (prevTypeWasAlign) {
          columnLines += "none ";
        }

        prevTypeWasAlign = true;
      } else if (cols[_i].type === "separator") {
        // MathML accepts only single lines between cells.
        // So we read only the first of consecutive separators.
        if (prevTypeWasAlign) {
          columnLines += cols[_i].separator === "|" ? "solid " : "dashed ";
          prevTypeWasAlign = false;
        }
      }
    }

    table.setAttribute("columnalign", align.trim());

    if (/[sd]/.test(columnLines)) {
      table.setAttribute("columnlines", columnLines.trim());
    }
  } // Set column spacing.


  if (group.colSeparationType === "align") {
    var _cols = group.cols || [];

    var spacing = "";

    for (var _i2 = 1; _i2 < _cols.length; _i2++) {
      spacing += _i2 % 2 ? "0em " : "1em ";
    }

    table.setAttribute("columnspacing", spacing.trim());
  } else if (group.colSeparationType === "alignat" || group.colSeparationType === "gather") {
    table.setAttribute("columnspacing", "0em");
  } else if (group.colSeparationType === "small") {
    table.setAttribute("columnspacing", "0.2778em");
  } else if (group.colSeparationType === "CD") {
    table.setAttribute("columnspacing", "0.5em");
  } else {
    table.setAttribute("columnspacing", "1em");
  } // Address \hline and \hdashline


  var rowLines = "";
  var hlines = group.hLinesBeforeRow;
  menclose += hlines[0].length > 0 ? "left " : "";
  menclose += hlines[hlines.length - 1].length > 0 ? "right " : "";

  for (var _i3 = 1; _i3 < hlines.length - 1; _i3++) {
    rowLines += hlines[_i3].length === 0 ? "none " // MathML accepts only a single line between rows. Read one element.
    : hlines[_i3][0] ? "dashed " : "solid ";
  }

  if (/[sd]/.test(rowLines)) {
    table.setAttribute("rowlines", rowLines.trim());
  }

  if (menclose !== "") {
    table = new mathMLTree.MathNode("menclose", [table]);
    table.setAttribute("notation", menclose.trim());
  }

  if (group.arraystretch && group.arraystretch < 1) {
    // A small array. Wrap in scriptstyle so row gap is not too large.
    table = new mathMLTree.MathNode("mstyle", [table]);
    table.setAttribute("scriptlevel", "1");
  }

  return table;
}; // Convenience function for align, align*, aligned, alignat, alignat*, alignedat.


var alignedHandler = function alignedHandler(context, args) {
  if (context.envName.indexOf("ed") === -1) {
    validateAmsEnvironmentContext(context);
  }

  var cols = [];
  var separationType = context.envName.indexOf("at") > -1 ? "alignat" : "align";
  var res = parseArray(context.parser, {
    cols: cols,
    addJot: true,
    addEqnNum: context.envName === "align" || context.envName === "alignat",
    emptySingleRow: true,
    colSeparationType: separationType,
    maxNumCols: context.envName === "split" ? 2 : undefined,
    leqno: context.parser.settings.leqno
  }, "display"); // Determining number of columns.
  // 1. If the first argument is given, we use it as a number of columns,
  //    and makes sure that each row doesn't exceed that number.
  // 2. Otherwise, just count number of columns = maximum number
  //    of cells in each row ("aligned" mode -- isAligned will be true).
  //
  // At the same time, prepend empty group {} at beginning of every second
  // cell in each row (starting with second cell) so that operators become
  // binary.  This behavior is implemented in amsmath's \start@aligned.

  var numMaths;
  var numCols = 0;
  var emptyGroup = {
    type: "ordgroup",
    mode: context.mode,
    body: []
  };

  if (args[0] && args[0].type === "ordgroup") {
    var arg0 = "";

    for (var i = 0; i < args[0].body.length; i++) {
      var textord = assertNodeType(args[0].body[i], "textord");
      arg0 += textord.text;
    }

    numMaths = Number(arg0);
    numCols = numMaths * 2;
  }

  var isAligned = !numCols;
  res.body.forEach(function (row) {
    for (var _i4 = 1; _i4 < row.length; _i4 += 2) {
      // Modify ordgroup node within styling node
      var styling = assertNodeType(row[_i4], "styling");
      var ordgroup = assertNodeType(styling.body[0], "ordgroup");
      ordgroup.body.unshift(emptyGroup);
    }

    if (!isAligned) {
      // Case 1
      var curMaths = row.length / 2;

      if (numMaths < curMaths) {
        throw new src_ParseError("Too many math in a row: " + ("expected " + numMaths + ", but got " + curMaths), row[0]);
      }
    } else if (numCols < row.length) {
      // Case 2
      numCols = row.length;
    }
  }); // Adjusting alignment.
  // In aligned mode, we add one \qquad between columns;
  // otherwise we add nothing.

  for (var _i5 = 0; _i5 < numCols; ++_i5) {
    var align = "r";
    var pregap = 0;

    if (_i5 % 2 === 1) {
      align = "l";
    } else if (_i5 > 0 && isAligned) {
      // "aligned" mode.
      pregap = 1; // add one \quad
    }

    cols[_i5] = {
      type: "align",
      align: align,
      pregap: pregap,
      postgap: 0
    };
  }

  res.colSeparationType = isAligned ? "align" : "alignat";
  return res;
}; // Arrays are part of LaTeX, defined in lttab.dtx so its documentation
// is part of the source2e.pdf file of LaTeX2e source documentation.
// {darray} is an {array} environment where cells are set in \displaystyle,
// as defined in nccmath.sty.


defineEnvironment({
  type: "array",
  names: ["array", "darray"],
  props: {
    numArgs: 1
  },
  handler: function handler(context, args) {
    // Since no types are specified above, the two possibilities are
    // - The argument is wrapped in {} or [], in which case Parser's
    //   parseGroup() returns an "ordgroup" wrapping some symbol node.
    // - The argument is a bare symbol node.
    var symNode = checkSymbolNodeType(args[0]);
    var colalign = symNode ? [args[0]] : assertNodeType(args[0], "ordgroup").body;
    var cols = colalign.map(function (nde) {
      var node = assertSymbolNodeType(nde);
      var ca = node.text;

      if ("lcr".indexOf(ca) !== -1) {
        return {
          type: "align",
          align: ca
        };
      } else if (ca === "|") {
        return {
          type: "separator",
          separator: "|"
        };
      } else if (ca === ":") {
        return {
          type: "separator",
          separator: ":"
        };
      }

      throw new src_ParseError("Unknown column alignment: " + ca, nde);
    });
    var res = {
      cols: cols,
      hskipBeforeAndAfter: true,
      // \@preamble in lttab.dtx
      maxNumCols: cols.length
    };
    return parseArray(context.parser, res, dCellStyle(context.envName));
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
}); // The matrix environments of amsmath builds on the array environment
// of LaTeX, which is discussed above.
// The mathtools package adds starred versions of the same environments.
// These have an optional argument to choose left|center|right justification.

defineEnvironment({
  type: "array",
  names: ["matrix", "pmatrix", "bmatrix", "Bmatrix", "vmatrix", "Vmatrix", "matrix*", "pmatrix*", "bmatrix*", "Bmatrix*", "vmatrix*", "Vmatrix*"],
  props: {
    numArgs: 0
  },
  handler: function handler(context) {
    var delimiters = {
      "matrix": null,
      "pmatrix": ["(", ")"],
      "bmatrix": ["[", "]"],
      "Bmatrix": ["\\{", "\\}"],
      "vmatrix": ["|", "|"],
      "Vmatrix": ["\\Vert", "\\Vert"]
    }[context.envName.replace("*", "")]; // \hskip -\arraycolsep in amsmath

    var colAlign = "c";
    var payload = {
      hskipBeforeAndAfter: false,
      cols: [{
        type: "align",
        align: colAlign
      }]
    };

    if (context.envName.charAt(context.envName.length - 1) === "*") {
      // It's one of the mathtools starred functions.
      // Parse the optional alignment argument.
      var parser = context.parser;
      parser.consumeSpaces();

      if (parser.fetch().text === "[") {
        parser.consume();
        parser.consumeSpaces();
        colAlign = parser.fetch().text;

        if ("lcr".indexOf(colAlign) === -1) {
          throw new src_ParseError("Expected l or c or r", parser.nextToken);
        }

        parser.consume();
        parser.consumeSpaces();
        parser.expect("]");
        parser.consume();
        payload.cols = [{
          type: "align",
          align: colAlign
        }];
      }
    }

    var res = parseArray(context.parser, payload, dCellStyle(context.envName)); // Populate cols with the correct number of column alignment specs.

    var numCols = Math.max.apply(Math, [0].concat(res.body.map(function (row) {
      return row.length;
    })));
    res.cols = new Array(numCols).fill({
      type: "align",
      align: colAlign
    });
    return delimiters ? {
      type: "leftright",
      mode: context.mode,
      body: [res],
      left: delimiters[0],
      right: delimiters[1],
      rightColor: undefined // \right uninfluenced by \color in array

    } : res;
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
});
defineEnvironment({
  type: "array",
  names: ["smallmatrix"],
  props: {
    numArgs: 0
  },
  handler: function handler(context) {
    var payload = {
      arraystretch: 0.5
    };
    var res = parseArray(context.parser, payload, "script");
    res.colSeparationType = "small";
    return res;
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
});
defineEnvironment({
  type: "array",
  names: ["subarray"],
  props: {
    numArgs: 1
  },
  handler: function handler(context, args) {
    // Parsing of {subarray} is similar to {array}
    var symNode = checkSymbolNodeType(args[0]);
    var colalign = symNode ? [args[0]] : assertNodeType(args[0], "ordgroup").body;
    var cols = colalign.map(function (nde) {
      var node = assertSymbolNodeType(nde);
      var ca = node.text; // {subarray} only recognizes "l" & "c"

      if ("lc".indexOf(ca) !== -1) {
        return {
          type: "align",
          align: ca
        };
      }

      throw new src_ParseError("Unknown column alignment: " + ca, nde);
    });

    if (cols.length > 1) {
      throw new src_ParseError("{subarray} can contain only one column");
    }

    var res = {
      cols: cols,
      hskipBeforeAndAfter: false,
      arraystretch: 0.5
    };
    res = parseArray(context.parser, res, "script");

    if (res.body.length > 0 && res.body[0].length > 1) {
      throw new src_ParseError("{subarray} can contain only one column");
    }

    return res;
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
}); // A cases environment (in amsmath.sty) is almost equivalent to
// \def\arraystretch{1.2}%
// \left\{\begin{array}{@{}l@{\quad}l@{}} … \end{array}\right.
// {dcases} is a {cases} environment where cells are set in \displaystyle,
// as defined in mathtools.sty.
// {rcases} is another mathtools environment. It's brace is on the right side.

defineEnvironment({
  type: "array",
  names: ["cases", "dcases", "rcases", "drcases"],
  props: {
    numArgs: 0
  },
  handler: function handler(context) {
    var payload = {
      arraystretch: 1.2,
      cols: [{
        type: "align",
        align: "l",
        pregap: 0,
        // TODO(kevinb) get the current style.
        // For now we use the metrics for TEXT style which is what we were
        // doing before.  Before attempting to get the current style we
        // should look at TeX's behavior especially for \over and matrices.
        postgap: 1.0
        /* 1em quad */

      }, {
        type: "align",
        align: "l",
        pregap: 0,
        postgap: 0
      }]
    };
    var res = parseArray(context.parser, payload, dCellStyle(context.envName));
    return {
      type: "leftright",
      mode: context.mode,
      body: [res],
      left: context.envName.indexOf("r") > -1 ? "." : "\\{",
      right: context.envName.indexOf("r") > -1 ? "\\}" : ".",
      rightColor: undefined
    };
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
}); // In the align environment, one uses ampersands, &, to specify number of
// columns in each row, and to locate spacing between each column.
// align gets automatic numbering. align* and aligned do not.
// The alignedat environment can be used in math mode.
// Note that we assume \nomallineskiplimit to be zero,
// so that \strut@ is the same as \strut.

defineEnvironment({
  type: "array",
  names: ["align", "align*", "aligned", "split"],
  props: {
    numArgs: 0
  },
  handler: alignedHandler,
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
}); // A gathered environment is like an array environment with one centered
// column, but where rows are considered lines so get \jot line spacing
// and contents are set in \displaystyle.

defineEnvironment({
  type: "array",
  names: ["gathered", "gather", "gather*"],
  props: {
    numArgs: 0
  },
  handler: function handler(context) {
    if (utils.contains(["gather", "gather*"], context.envName)) {
      validateAmsEnvironmentContext(context);
    }

    var res = {
      cols: [{
        type: "align",
        align: "c"
      }],
      addJot: true,
      colSeparationType: "gather",
      addEqnNum: context.envName === "gather",
      emptySingleRow: true,
      leqno: context.parser.settings.leqno
    };
    return parseArray(context.parser, res, "display");
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
}); // alignat environment is like an align environment, but one must explicitly
// specify maximum number of columns in each row, and can adjust spacing between
// each columns.

defineEnvironment({
  type: "array",
  names: ["alignat", "alignat*", "alignedat"],
  props: {
    numArgs: 1
  },
  handler: alignedHandler,
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
});
defineEnvironment({
  type: "array",
  names: ["equation", "equation*"],
  props: {
    numArgs: 0
  },
  handler: function handler(context) {
    validateAmsEnvironmentContext(context);
    var res = {
      addEqnNum: context.envName === "equation",
      emptySingleRow: true,
      singleRow: true,
      maxNumCols: 1,
      leqno: context.parser.settings.leqno
    };
    return parseArray(context.parser, res, "display");
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
});
defineEnvironment({
  type: "array",
  names: ["CD"],
  props: {
    numArgs: 0
  },
  handler: function handler(context) {
    validateAmsEnvironmentContext(context);
    return parseCD(context.parser);
  },
  htmlBuilder: array_htmlBuilder,
  mathmlBuilder: array_mathmlBuilder
}); // Catch \hline outside array environment

defineFunction({
  type: "text",
  // Doesn't matter what this is.
  names: ["\\hline", "\\hdashline"],
  props: {
    numArgs: 0,
    allowedInText: true,
    allowedInMath: true
  },
  handler: function handler(context, args) {
    throw new src_ParseError(context.funcName + " valid only within array environment");
  }
});

var environments = _environments;
/* harmony default export */ var src_environments = (environments); // All environment definitions should be imported below



 // Environment delimiters. HTML/MathML rendering is defined in the corresponding
// defineEnvironment definitions.

defineFunction({
  type: "environment",
  names: ["\\begin", "\\end"],
  props: {
    numArgs: 1,
    argTypes: ["text"]
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var nameGroup = args[0];

    if (nameGroup.type !== "ordgroup") {
      throw new src_ParseError("Invalid environment name", nameGroup);
    }

    var envName = "";

    for (var i = 0; i < nameGroup.body.length; ++i) {
      envName += assertNodeType(nameGroup.body[i], "textord").text;
    }

    if (funcName === "\\begin") {
      // begin...end is similar to left...right
      if (!src_environments.hasOwnProperty(envName)) {
        throw new src_ParseError("No such environment: " + envName, nameGroup);
      } // Build the environment object. Arguments and other information will
      // be made available to the begin and end methods using properties.


      var env = src_environments[envName];

      var _parser$parseArgument = parser.parseArguments("\\begin{" + envName + "}", env),
          _args = _parser$parseArgument.args,
          optArgs = _parser$parseArgument.optArgs;

      var context = {
        mode: parser.mode,
        envName: envName,
        parser: parser
      };
      var result = env.handler(context, _args, optArgs);
      parser.expect("\\end", false);
      var endNameToken = parser.nextToken;
      var end = assertNodeType(parser.parseFunction(), "environment");

      if (end.name !== envName) {
        throw new src_ParseError("Mismatch: \\begin{" + envName + "} matched by \\end{" + end.name + "}", endNameToken);
      } // $FlowFixMe, "environment" handler returns an environment ParseNode


      return result;
    }

    return {
      type: "environment",
      mode: parser.mode,
      name: envName,
      nameGroup: nameGroup
    };
  }
});






var mclass_makeSpan = buildCommon.makeSpan;

function mclass_htmlBuilder(group, options) {
  var elements = buildExpression(group.body, options, true);
  return mclass_makeSpan([group.mclass], elements, options);
}

function mclass_mathmlBuilder(group, options) {
  var node;
  var inner = buildMathML_buildExpression(group.body, options);

  if (group.mclass === "minner") {
    return mathMLTree.newDocumentFragment(inner);
  } else if (group.mclass === "mord") {
    if (group.isCharacterBox) {
      node = inner[0];
      node.type = "mi";
    } else {
      node = new mathMLTree.MathNode("mi", inner);
    }
  } else {
    if (group.isCharacterBox) {
      node = inner[0];
      node.type = "mo";
    } else {
      node = new mathMLTree.MathNode("mo", inner);
    } // Set spacing based on what is the most likely adjacent atom type.
    // See TeXbook p170.


    if (group.mclass === "mbin") {
      node.attributes.lspace = "0.22em"; // medium space

      node.attributes.rspace = "0.22em";
    } else if (group.mclass === "mpunct") {
      node.attributes.lspace = "0em";
      node.attributes.rspace = "0.17em"; // thinspace
    } else if (group.mclass === "mopen" || group.mclass === "mclose") {
      node.attributes.lspace = "0em";
      node.attributes.rspace = "0em";
    } // MathML <mo> default space is 5/18 em, so <mrel> needs no action.
    // Ref: https://developer.mozilla.org/en-US/docs/Web/MathML/Element/mo

  }

  return node;
} // Math class commands except \mathop


defineFunction({
  type: "mclass",
  names: ["\\mathord", "\\mathbin", "\\mathrel", "\\mathopen", "\\mathclose", "\\mathpunct", "\\mathinner"],
  props: {
    numArgs: 1,
    primitive: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var body = args[0];
    return {
      type: "mclass",
      mode: parser.mode,
      mclass: "m" + funcName.substr(5),
      // TODO(kevinb): don't prefix with 'm'
      body: ordargument(body),
      isCharacterBox: utils.isCharacterBox(body)
    };
  },
  htmlBuilder: mclass_htmlBuilder,
  mathmlBuilder: mclass_mathmlBuilder
});
var binrelClass = function binrelClass(arg) {
  // \binrel@ spacing varies with (bin|rel|ord) of the atom in the argument.
  // (by rendering separately and with {}s before and after, and measuring
  // the change in spacing).  We'll do roughly the same by detecting the
  // atom type directly.
  var atom = arg.type === "ordgroup" && arg.body.length ? arg.body[0] : arg;

  if (atom.type === "atom" && (atom.family === "bin" || atom.family === "rel")) {
    return "m" + atom.family;
  } else {
    return "mord";
  }
}; // \@binrel{x}{y} renders like y but as mbin/mrel/mord if x is mbin/mrel/mord.
// This is equivalent to \binrel@{x}\binrel@@{y} in AMSTeX.

defineFunction({
  type: "mclass",
  names: ["\\@binrel"],
  props: {
    numArgs: 2
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser;
    return {
      type: "mclass",
      mode: parser.mode,
      mclass: binrelClass(args[0]),
      body: ordargument(args[1]),
      isCharacterBox: utils.isCharacterBox(args[1])
    };
  }
}); // Build a relation or stacked op by placing one symbol on top of another

defineFunction({
  type: "mclass",
  names: ["\\stackrel", "\\overset", "\\underset"],
  props: {
    numArgs: 2
  },
  handler: function handler(_ref3, args) {
    var parser = _ref3.parser,
        funcName = _ref3.funcName;
    var baseArg = args[1];
    var shiftedArg = args[0];
    var mclass;

    if (funcName !== "\\stackrel") {
      // LaTeX applies \binrel spacing to \overset and \underset.
      mclass = binrelClass(baseArg);
    } else {
      mclass = "mrel"; // for \stackrel
    }

    var baseOp = {
      type: "op",
      mode: baseArg.mode,
      limits: true,
      alwaysHandleSupSub: true,
      parentIsSupSub: false,
      symbol: false,
      suppressBaseShift: funcName !== "\\stackrel",
      body: ordargument(baseArg)
    };
    var supsub = {
      type: "supsub",
      mode: shiftedArg.mode,
      base: baseOp,
      sup: funcName === "\\underset" ? null : shiftedArg,
      sub: funcName === "\\underset" ? shiftedArg : null
    };
    return {
      type: "mclass",
      mode: parser.mode,
      mclass: mclass,
      body: [supsub],
      isCharacterBox: utils.isCharacterBox(supsub)
    };
  },
  htmlBuilder: mclass_htmlBuilder,
  mathmlBuilder: mclass_mathmlBuilder
});
// TODO(kevinb): implement \\sl and \\sc






var font_htmlBuilder = function htmlBuilder(group, options) {
  var font = group.font;
  var newOptions = options.withFont(font);
  return buildGroup(group.body, newOptions);
};

var font_mathmlBuilder = function mathmlBuilder(group, options) {
  var font = group.font;
  var newOptions = options.withFont(font);
  return buildMathML_buildGroup(group.body, newOptions);
};

var fontAliases = {
  "\\Bbb": "\\mathbb",
  "\\bold": "\\mathbf",
  "\\frak": "\\mathfrak",
  "\\bm": "\\boldsymbol"
};
defineFunction({
  type: "font",
  names: [// styles, except \boldsymbol defined below
  "\\mathrm", "\\mathit", "\\mathbf", "\\mathnormal", // families
  "\\mathbb", "\\mathcal", "\\mathfrak", "\\mathscr", "\\mathsf", "\\mathtt", // aliases, except \bm defined below
  "\\Bbb", "\\bold", "\\frak"],
  props: {
    numArgs: 1,
    allowedInArgument: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var body = normalizeArgument(args[0]);
    var func = funcName;

    if (func in fontAliases) {
      func = fontAliases[func];
    }

    return {
      type: "font",
      mode: parser.mode,
      font: func.slice(1),
      body: body
    };
  },
  htmlBuilder: font_htmlBuilder,
  mathmlBuilder: font_mathmlBuilder
});
defineFunction({
  type: "mclass",
  names: ["\\boldsymbol", "\\bm"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser;
    var body = args[0];
    var isCharacterBox = utils.isCharacterBox(body); // amsbsy.sty's \boldsymbol uses \binrel spacing to inherit the
    // argument's bin|rel|ord status

    return {
      type: "mclass",
      mode: parser.mode,
      mclass: binrelClass(body),
      body: [{
        type: "font",
        mode: parser.mode,
        font: "boldsymbol",
        body: body
      }],
      isCharacterBox: isCharacterBox
    };
  }
}); // Old font changing functions

defineFunction({
  type: "font",
  names: ["\\rm", "\\sf", "\\tt", "\\bf", "\\it", "\\cal"],
  props: {
    numArgs: 0,
    allowedInText: true
  },
  handler: function handler(_ref3, args) {
    var parser = _ref3.parser,
        funcName = _ref3.funcName,
        breakOnTokenText = _ref3.breakOnTokenText;
    var mode = parser.mode;
    var body = parser.parseExpression(true, breakOnTokenText);
    var style = "math" + funcName.slice(1);
    return {
      type: "font",
      mode: mode,
      font: style,
      body: {
        type: "ordgroup",
        mode: parser.mode,
        body: body
      }
    };
  },
  htmlBuilder: font_htmlBuilder,
  mathmlBuilder: font_mathmlBuilder
});











var adjustStyle = function adjustStyle(size, originalStyle) {
  // Figure out what style this fraction should be in based on the
  // function used
  var style = originalStyle;

  if (size === "display") {
    // Get display style as a default.
    // If incoming style is sub/sup, use style.text() to get correct size.
    style = style.id >= src_Style.SCRIPT.id ? style.text() : src_Style.DISPLAY;
  } else if (size === "text" && style.size === src_Style.DISPLAY.size) {
    // We're in a \tfrac but incoming style is displaystyle, so:
    style = src_Style.TEXT;
  } else if (size === "script") {
    style = src_Style.SCRIPT;
  } else if (size === "scriptscript") {
    style = src_Style.SCRIPTSCRIPT;
  }

  return style;
};

var genfrac_htmlBuilder = function htmlBuilder(group, options) {
  // Fractions are handled in the TeXbook on pages 444-445, rules 15(a-e).
  var style = adjustStyle(group.size, options.style);
  var nstyle = style.fracNum();
  var dstyle = style.fracDen();
  var newOptions;
  newOptions = options.havingStyle(nstyle);
  var numerm = buildGroup(group.numer, newOptions, options);

  if (group.continued) {
    // \cfrac inserts a \strut into the numerator.
    // Get \strut dimensions from TeXbook page 353.
    var hStrut = 8.5 / options.fontMetrics().ptPerEm;
    var dStrut = 3.5 / options.fontMetrics().ptPerEm;
    numerm.height = numerm.height < hStrut ? hStrut : numerm.height;
    numerm.depth = numerm.depth < dStrut ? dStrut : numerm.depth;
  }

  newOptions = options.havingStyle(dstyle);
  var denomm = buildGroup(group.denom, newOptions, options);
  var rule;
  var ruleWidth;
  var ruleSpacing;

  if (group.hasBarLine) {
    if (group.barSize) {
      ruleWidth = calculateSize(group.barSize, options);
      rule = buildCommon.makeLineSpan("frac-line", options, ruleWidth);
    } else {
      rule = buildCommon.makeLineSpan("frac-line", options);
    }

    ruleWidth = rule.height;
    ruleSpacing = rule.height;
  } else {
    rule = null;
    ruleWidth = 0;
    ruleSpacing = options.fontMetrics().defaultRuleThickness;
  } // Rule 15b


  var numShift;
  var clearance;
  var denomShift;

  if (style.size === src_Style.DISPLAY.size || group.size === "display") {
    numShift = options.fontMetrics().num1;

    if (ruleWidth > 0) {
      clearance = 3 * ruleSpacing;
    } else {
      clearance = 7 * ruleSpacing;
    }

    denomShift = options.fontMetrics().denom1;
  } else {
    if (ruleWidth > 0) {
      numShift = options.fontMetrics().num2;
      clearance = ruleSpacing;
    } else {
      numShift = options.fontMetrics().num3;
      clearance = 3 * ruleSpacing;
    }

    denomShift = options.fontMetrics().denom2;
  }

  var frac;

  if (!rule) {
    // Rule 15c
    var candidateClearance = numShift - numerm.depth - (denomm.height - denomShift);

    if (candidateClearance < clearance) {
      numShift += 0.5 * (clearance - candidateClearance);
      denomShift += 0.5 * (clearance - candidateClearance);
    }

    frac = buildCommon.makeVList({
      positionType: "individualShift",
      children: [{
        type: "elem",
        elem: denomm,
        shift: denomShift
      }, {
        type: "elem",
        elem: numerm,
        shift: -numShift
      }]
    }, options);
  } else {
    // Rule 15d
    var axisHeight = options.fontMetrics().axisHeight;

    if (numShift - numerm.depth - (axisHeight + 0.5 * ruleWidth) < clearance) {
      numShift += clearance - (numShift - numerm.depth - (axisHeight + 0.5 * ruleWidth));
    }

    if (axisHeight - 0.5 * ruleWidth - (denomm.height - denomShift) < clearance) {
      denomShift += clearance - (axisHeight - 0.5 * ruleWidth - (denomm.height - denomShift));
    }

    var midShift = -(axisHeight - 0.5 * ruleWidth);
    frac = buildCommon.makeVList({
      positionType: "individualShift",
      children: [{
        type: "elem",
        elem: denomm,
        shift: denomShift
      }, {
        type: "elem",
        elem: rule,
        shift: midShift
      }, {
        type: "elem",
        elem: numerm,
        shift: -numShift
      }]
    }, options);
  } // Since we manually change the style sometimes (with \dfrac or \tfrac),
  // account for the possible size change here.


  newOptions = options.havingStyle(style);
  frac.height *= newOptions.sizeMultiplier / options.sizeMultiplier;
  frac.depth *= newOptions.sizeMultiplier / options.sizeMultiplier; // Rule 15e

  var delimSize;

  if (style.size === src_Style.DISPLAY.size) {
    delimSize = options.fontMetrics().delim1;
  } else if (style.size === src_Style.SCRIPTSCRIPT.size) {
    delimSize = options.havingStyle(src_Style.SCRIPT).fontMetrics().delim2;
  } else {
    delimSize = options.fontMetrics().delim2;
  }

  var leftDelim;
  var rightDelim;

  if (group.leftDelim == null) {
    leftDelim = makeNullDelimiter(options, ["mopen"]);
  } else {
    leftDelim = delimiter.customSizedDelim(group.leftDelim, delimSize, true, options.havingStyle(style), group.mode, ["mopen"]);
  }

  if (group.continued) {
    rightDelim = buildCommon.makeSpan([]); // zero width for \cfrac
  } else if (group.rightDelim == null) {
    rightDelim = makeNullDelimiter(options, ["mclose"]);
  } else {
    rightDelim = delimiter.customSizedDelim(group.rightDelim, delimSize, true, options.havingStyle(style), group.mode, ["mclose"]);
  }

  return buildCommon.makeSpan(["mord"].concat(newOptions.sizingClasses(options)), [leftDelim, buildCommon.makeSpan(["mfrac"], [frac]), rightDelim], options);
};

var genfrac_mathmlBuilder = function mathmlBuilder(group, options) {
  var node = new mathMLTree.MathNode("mfrac", [buildMathML_buildGroup(group.numer, options), buildMathML_buildGroup(group.denom, options)]);

  if (!group.hasBarLine) {
    node.setAttribute("linethickness", "0px");
  } else if (group.barSize) {
    var ruleWidth = calculateSize(group.barSize, options);
    node.setAttribute("linethickness", makeEm(ruleWidth));
  }

  var style = adjustStyle(group.size, options.style);

  if (style.size !== options.style.size) {
    node = new mathMLTree.MathNode("mstyle", [node]);
    var isDisplay = style.size === src_Style.DISPLAY.size ? "true" : "false";
    node.setAttribute("displaystyle", isDisplay);
    node.setAttribute("scriptlevel", "0");
  }

  if (group.leftDelim != null || group.rightDelim != null) {
    var withDelims = [];

    if (group.leftDelim != null) {
      var leftOp = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode(group.leftDelim.replace("\\", ""))]);
      leftOp.setAttribute("fence", "true");
      withDelims.push(leftOp);
    }

    withDelims.push(node);

    if (group.rightDelim != null) {
      var rightOp = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode(group.rightDelim.replace("\\", ""))]);
      rightOp.setAttribute("fence", "true");
      withDelims.push(rightOp);
    }

    return makeRow(withDelims);
  }

  return node;
};

defineFunction({
  type: "genfrac",
  names: ["\\dfrac", "\\frac", "\\tfrac", "\\dbinom", "\\binom", "\\tbinom", "\\\\atopfrac", // can’t be entered directly
  "\\\\bracefrac", "\\\\brackfrac" // ditto
  ],
  props: {
    numArgs: 2,
    allowedInArgument: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var numer = args[0];
    var denom = args[1];
    var hasBarLine;
    var leftDelim = null;
    var rightDelim = null;
    var size = "auto";

    switch (funcName) {
      case "\\dfrac":
      case "\\frac":
      case "\\tfrac":
        hasBarLine = true;
        break;

      case "\\\\atopfrac":
        hasBarLine = false;
        break;

      case "\\dbinom":
      case "\\binom":
      case "\\tbinom":
        hasBarLine = false;
        leftDelim = "(";
        rightDelim = ")";
        break;

      case "\\\\bracefrac":
        hasBarLine = false;
        leftDelim = "\\{";
        rightDelim = "\\}";
        break;

      case "\\\\brackfrac":
        hasBarLine = false;
        leftDelim = "[";
        rightDelim = "]";
        break;

      default:
        throw new Error("Unrecognized genfrac command");
    }

    switch (funcName) {
      case "\\dfrac":
      case "\\dbinom":
        size = "display";
        break;

      case "\\tfrac":
      case "\\tbinom":
        size = "text";
        break;
    }

    return {
      type: "genfrac",
      mode: parser.mode,
      continued: false,
      numer: numer,
      denom: denom,
      hasBarLine: hasBarLine,
      leftDelim: leftDelim,
      rightDelim: rightDelim,
      size: size,
      barSize: null
    };
  },
  htmlBuilder: genfrac_htmlBuilder,
  mathmlBuilder: genfrac_mathmlBuilder
});
defineFunction({
  type: "genfrac",
  names: ["\\cfrac"],
  props: {
    numArgs: 2
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser;
        _ref2.funcName;
    var numer = args[0];
    var denom = args[1];
    return {
      type: "genfrac",
      mode: parser.mode,
      continued: true,
      numer: numer,
      denom: denom,
      hasBarLine: true,
      leftDelim: null,
      rightDelim: null,
      size: "display",
      barSize: null
    };
  }
}); // Infix generalized fractions -- these are not rendered directly, but replaced
// immediately by one of the variants above.

defineFunction({
  type: "infix",
  names: ["\\over", "\\choose", "\\atop", "\\brace", "\\brack"],
  props: {
    numArgs: 0,
    infix: true
  },
  handler: function handler(_ref3) {
    var parser = _ref3.parser,
        funcName = _ref3.funcName,
        token = _ref3.token;
    var replaceWith;

    switch (funcName) {
      case "\\over":
        replaceWith = "\\frac";
        break;

      case "\\choose":
        replaceWith = "\\binom";
        break;

      case "\\atop":
        replaceWith = "\\\\atopfrac";
        break;

      case "\\brace":
        replaceWith = "\\\\bracefrac";
        break;

      case "\\brack":
        replaceWith = "\\\\brackfrac";
        break;

      default:
        throw new Error("Unrecognized infix genfrac command");
    }

    return {
      type: "infix",
      mode: parser.mode,
      replaceWith: replaceWith,
      token: token
    };
  }
});
var stylArray = ["display", "text", "script", "scriptscript"];

var delimFromValue = function delimFromValue(delimString) {
  var delim = null;

  if (delimString.length > 0) {
    delim = delimString;
    delim = delim === "." ? null : delim;
  }

  return delim;
};

defineFunction({
  type: "genfrac",
  names: ["\\genfrac"],
  props: {
    numArgs: 6,
    allowedInArgument: true,
    argTypes: ["math", "math", "size", "text", "math", "math"]
  },
  handler: function handler(_ref4, args) {
    var parser = _ref4.parser;
    var numer = args[4];
    var denom = args[5]; // Look into the parse nodes to get the desired delimiters.

    var leftNode = normalizeArgument(args[0]);
    var leftDelim = leftNode.type === "atom" && leftNode.family === "open" ? delimFromValue(leftNode.text) : null;
    var rightNode = normalizeArgument(args[1]);
    var rightDelim = rightNode.type === "atom" && rightNode.family === "close" ? delimFromValue(rightNode.text) : null;
    var barNode = assertNodeType(args[2], "size");
    var hasBarLine;
    var barSize = null;

    if (barNode.isBlank) {
      // \genfrac acts differently than \above.
      // \genfrac treats an empty size group as a signal to use a
      // standard bar size. \above would see size = 0 and omit the bar.
      hasBarLine = true;
    } else {
      barSize = barNode.value;
      hasBarLine = barSize.number > 0;
    } // Find out if we want displaystyle, textstyle, etc.


    var size = "auto";
    var styl = args[3];

    if (styl.type === "ordgroup") {
      if (styl.body.length > 0) {
        var textOrd = assertNodeType(styl.body[0], "textord");
        size = stylArray[Number(textOrd.text)];
      }
    } else {
      styl = assertNodeType(styl, "textord");
      size = stylArray[Number(styl.text)];
    }

    return {
      type: "genfrac",
      mode: parser.mode,
      numer: numer,
      denom: denom,
      continued: false,
      hasBarLine: hasBarLine,
      barSize: barSize,
      leftDelim: leftDelim,
      rightDelim: rightDelim,
      size: size
    };
  },
  htmlBuilder: genfrac_htmlBuilder,
  mathmlBuilder: genfrac_mathmlBuilder
}); // \above is an infix fraction that also defines a fraction bar size.

defineFunction({
  type: "infix",
  names: ["\\above"],
  props: {
    numArgs: 1,
    argTypes: ["size"],
    infix: true
  },
  handler: function handler(_ref5, args) {
    var parser = _ref5.parser;
        _ref5.funcName;
        var token = _ref5.token;
    return {
      type: "infix",
      mode: parser.mode,
      replaceWith: "\\\\abovefrac",
      size: assertNodeType(args[0], "size").value,
      token: token
    };
  }
});
defineFunction({
  type: "genfrac",
  names: ["\\\\abovefrac"],
  props: {
    numArgs: 3,
    argTypes: ["math", "size", "math"]
  },
  handler: function handler(_ref6, args) {
    var parser = _ref6.parser;
        _ref6.funcName;
    var numer = args[0];
    var barSize = assert(assertNodeType(args[1], "infix").size);
    var denom = args[2];
    var hasBarLine = barSize.number > 0;
    return {
      type: "genfrac",
      mode: parser.mode,
      numer: numer,
      denom: denom,
      continued: false,
      hasBarLine: hasBarLine,
      barSize: barSize,
      leftDelim: null,
      rightDelim: null,
      size: "auto"
    };
  },
  htmlBuilder: genfrac_htmlBuilder,
  mathmlBuilder: genfrac_mathmlBuilder
});








// NOTE: Unlike most `htmlBuilder`s, this one handles not only "horizBrace", but
// also "supsub" since an over/underbrace can affect super/subscripting.
var horizBrace_htmlBuilder = function htmlBuilder(grp, options) {
  var style = options.style; // Pull out the `ParseNode<"horizBrace">` if `grp` is a "supsub" node.

  var supSubGroup;
  var group;

  if (grp.type === "supsub") {
    // Ref: LaTeX source2e: }}}}\limits}
    // i.e. LaTeX treats the brace similar to an op and passes it
    // with \limits, so we need to assign supsub style.
    supSubGroup = grp.sup ? buildGroup(grp.sup, options.havingStyle(style.sup()), options) : buildGroup(grp.sub, options.havingStyle(style.sub()), options);
    group = assertNodeType(grp.base, "horizBrace");
  } else {
    group = assertNodeType(grp, "horizBrace");
  } // Build the base group


  var body = buildGroup(group.base, options.havingBaseStyle(src_Style.DISPLAY)); // Create the stretchy element

  var braceBody = stretchy.svgSpan(group, options); // Generate the vlist, with the appropriate kerns        ┏━━━━━━━━┓
  // This first vlist contains the content and the brace:   equation

  var vlist;

  if (group.isOver) {
    vlist = buildCommon.makeVList({
      positionType: "firstBaseline",
      children: [{
        type: "elem",
        elem: body
      }, {
        type: "kern",
        size: 0.1
      }, {
        type: "elem",
        elem: braceBody
      }]
    }, options); // $FlowFixMe: Replace this with passing "svg-align" into makeVList.

    vlist.children[0].children[0].children[1].classes.push("svg-align");
  } else {
    vlist = buildCommon.makeVList({
      positionType: "bottom",
      positionData: body.depth + 0.1 + braceBody.height,
      children: [{
        type: "elem",
        elem: braceBody
      }, {
        type: "kern",
        size: 0.1
      }, {
        type: "elem",
        elem: body
      }]
    }, options); // $FlowFixMe: Replace this with passing "svg-align" into makeVList.

    vlist.children[0].children[0].children[0].classes.push("svg-align");
  }

  if (supSubGroup) {
    // To write the supsub, wrap the first vlist in another vlist:
    // They can't all go in the same vlist, because the note might be
    // wider than the equation. We want the equation to control the
    // brace width.
    //      note          long note           long note
    //   ┏━━━━━━━━┓   or    ┏━━━┓     not    ┏━━━━━━━━━┓
    //    equation           eqn                 eqn
    var vSpan = buildCommon.makeSpan(["mord", group.isOver ? "mover" : "munder"], [vlist], options);

    if (group.isOver) {
      vlist = buildCommon.makeVList({
        positionType: "firstBaseline",
        children: [{
          type: "elem",
          elem: vSpan
        }, {
          type: "kern",
          size: 0.2
        }, {
          type: "elem",
          elem: supSubGroup
        }]
      }, options);
    } else {
      vlist = buildCommon.makeVList({
        positionType: "bottom",
        positionData: vSpan.depth + 0.2 + supSubGroup.height + supSubGroup.depth,
        children: [{
          type: "elem",
          elem: supSubGroup
        }, {
          type: "kern",
          size: 0.2
        }, {
          type: "elem",
          elem: vSpan
        }]
      }, options);
    }
  }

  return buildCommon.makeSpan(["mord", group.isOver ? "mover" : "munder"], [vlist], options);
};

var horizBrace_mathmlBuilder = function mathmlBuilder(group, options) {
  var accentNode = stretchy.mathMLnode(group.label);
  return new mathMLTree.MathNode(group.isOver ? "mover" : "munder", [buildMathML_buildGroup(group.base, options), accentNode]);
}; // Horizontal stretchy braces


defineFunction({
  type: "horizBrace",
  names: ["\\overbrace", "\\underbrace"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    return {
      type: "horizBrace",
      mode: parser.mode,
      label: funcName,
      isOver: /^\\over/.test(funcName),
      base: args[0]
    };
  },
  htmlBuilder: horizBrace_htmlBuilder,
  mathmlBuilder: horizBrace_mathmlBuilder
});






defineFunction({
  type: "href",
  names: ["\\href"],
  props: {
    numArgs: 2,
    argTypes: ["url", "original"],
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    var body = args[1];
    var href = assertNodeType(args[0], "url").url;

    if (!parser.settings.isTrusted({
      command: "\\href",
      url: href
    })) {
      return parser.formatUnsupportedCmd("\\href");
    }

    return {
      type: "href",
      mode: parser.mode,
      href: href,
      body: ordargument(body)
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var elements = buildExpression(group.body, options, false);
    return buildCommon.makeAnchor(group.href, [], elements, options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var math = buildExpressionRow(group.body, options);

    if (!(math instanceof MathNode)) {
      math = new MathNode("mrow", [math]);
    }

    math.setAttribute("href", group.href);
    return math;
  }
});
defineFunction({
  type: "href",
  names: ["\\url"],
  props: {
    numArgs: 1,
    argTypes: ["url"],
    allowedInText: true
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser;
    var href = assertNodeType(args[0], "url").url;

    if (!parser.settings.isTrusted({
      command: "\\url",
      url: href
    })) {
      return parser.formatUnsupportedCmd("\\url");
    }

    var chars = [];

    for (var i = 0; i < href.length; i++) {
      var c = href[i];

      if (c === "~") {
        c = "\\textasciitilde";
      }

      chars.push({
        type: "textord",
        mode: "text",
        text: c
      });
    }

    var body = {
      type: "text",
      mode: parser.mode,
      font: "\\texttt",
      body: chars
    };
    return {
      type: "href",
      mode: parser.mode,
      href: href,
      body: ordargument(body)
    };
  }
});




 // \hbox is provided for compatibility with LaTeX \vcenter.
// In LaTeX, \vcenter can act only on a box, as in
// \vcenter{\hbox{$\frac{a+b}{\dfrac{c}{d}}$}}
// This function by itself doesn't do anything but prevent a soft line break.

defineFunction({
  type: "hbox",
  names: ["\\hbox"],
  props: {
    numArgs: 1,
    argTypes: ["text"],
    allowedInText: true,
    primitive: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    return {
      type: "hbox",
      mode: parser.mode,
      body: ordargument(args[0])
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var elements = buildExpression(group.body, options, false);
    return buildCommon.makeFragment(elements);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    return new mathMLTree.MathNode("mrow", buildMathML_buildExpression(group.body, options));
  }
});






defineFunction({
  type: "html",
  names: ["\\htmlClass", "\\htmlId", "\\htmlStyle", "\\htmlData"],
  props: {
    numArgs: 2,
    argTypes: ["raw", "original"],
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
        _ref.token;
    var value = assertNodeType(args[0], "raw").string;
    var body = args[1];

    if (parser.settings.strict) {
      parser.settings.reportNonstrict("htmlExtension", "HTML extension is disabled on strict mode");
    }

    var trustContext;
    var attributes = {};

    switch (funcName) {
      case "\\htmlClass":
        attributes.class = value;
        trustContext = {
          command: "\\htmlClass",
          class: value
        };
        break;

      case "\\htmlId":
        attributes.id = value;
        trustContext = {
          command: "\\htmlId",
          id: value
        };
        break;

      case "\\htmlStyle":
        attributes.style = value;
        trustContext = {
          command: "\\htmlStyle",
          style: value
        };
        break;

      case "\\htmlData":
        {
          var data = value.split(",");

          for (var i = 0; i < data.length; i++) {
            var keyVal = data[i].split("=");

            if (keyVal.length !== 2) {
              throw new src_ParseError("Error parsing key-value for \\htmlData");
            }

            attributes["data-" + keyVal[0].trim()] = keyVal[1].trim();
          }

          trustContext = {
            command: "\\htmlData",
            attributes: attributes
          };
          break;
        }

      default:
        throw new Error("Unrecognized html command");
    }

    if (!parser.settings.isTrusted(trustContext)) {
      return parser.formatUnsupportedCmd(funcName);
    }

    return {
      type: "html",
      mode: parser.mode,
      attributes: attributes,
      body: ordargument(body)
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var elements = buildExpression(group.body, options, false);
    var classes = ["enclosing"];

    if (group.attributes.class) {
      classes.push.apply(classes, group.attributes.class.trim().split(/\s+/));
    }

    var span = buildCommon.makeSpan(classes, elements, options);

    for (var attr in group.attributes) {
      if (attr !== "class" && group.attributes.hasOwnProperty(attr)) {
        span.setAttribute(attr, group.attributes[attr]);
      }
    }

    return span;
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    return buildExpressionRow(group.body, options);
  }
});




defineFunction({
  type: "htmlmathml",
  names: ["\\html@mathml"],
  props: {
    numArgs: 2,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    return {
      type: "htmlmathml",
      mode: parser.mode,
      html: ordargument(args[0]),
      mathml: ordargument(args[1])
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var elements = buildExpression(group.html, options, false);
    return buildCommon.makeFragment(elements);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    return buildExpressionRow(group.mathml, options);
  }
});







var sizeData = function sizeData(str) {
  if (/^[-+]? *(\d+(\.\d*)?|\.\d+)$/.test(str)) {
    // str is a number with no unit specified.
    // default unit is bp, per graphix package.
    return {
      number: +str,
      unit: "bp"
    };
  } else {
    var match = /([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/.exec(str);

    if (!match) {
      throw new src_ParseError("Invalid size: '" + str + "' in \\includegraphics");
    }

    var data = {
      number: +(match[1] + match[2]),
      // sign + magnitude, cast to number
      unit: match[3]
    };

    if (!validUnit(data)) {
      throw new src_ParseError("Invalid unit: '" + data.unit + "' in \\includegraphics.");
    }

    return data;
  }
};

defineFunction({
  type: "includegraphics",
  names: ["\\includegraphics"],
  props: {
    numArgs: 1,
    numOptionalArgs: 1,
    argTypes: ["raw", "url"],
    allowedInText: false
  },
  handler: function handler(_ref, args, optArgs) {
    var parser = _ref.parser;
    var width = {
      number: 0,
      unit: "em"
    };
    var height = {
      number: 0.9,
      unit: "em"
    }; // sorta character sized.

    var totalheight = {
      number: 0,
      unit: "em"
    };
    var alt = "";

    if (optArgs[0]) {
      var attributeStr = assertNodeType(optArgs[0], "raw").string; // Parser.js does not parse key/value pairs. We get a string.

      var attributes = attributeStr.split(",");

      for (var i = 0; i < attributes.length; i++) {
        var keyVal = attributes[i].split("=");

        if (keyVal.length === 2) {
          var str = keyVal[1].trim();

          switch (keyVal[0].trim()) {
            case "alt":
              alt = str;
              break;

            case "width":
              width = sizeData(str);
              break;

            case "height":
              height = sizeData(str);
              break;

            case "totalheight":
              totalheight = sizeData(str);
              break;

            default:
              throw new src_ParseError("Invalid key: '" + keyVal[0] + "' in \\includegraphics.");
          }
        }
      }
    }

    var src = assertNodeType(args[0], "url").url;

    if (alt === "") {
      // No alt given. Use the file name. Strip away the path.
      alt = src;
      alt = alt.replace(/^.*[\\/]/, '');
      alt = alt.substring(0, alt.lastIndexOf('.'));
    }

    if (!parser.settings.isTrusted({
      command: "\\includegraphics",
      url: src
    })) {
      return parser.formatUnsupportedCmd("\\includegraphics");
    }

    return {
      type: "includegraphics",
      mode: parser.mode,
      alt: alt,
      width: width,
      height: height,
      totalheight: totalheight,
      src: src
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var height = calculateSize(group.height, options);
    var depth = 0;

    if (group.totalheight.number > 0) {
      depth = calculateSize(group.totalheight, options) - height;
    }

    var width = 0;

    if (group.width.number > 0) {
      width = calculateSize(group.width, options);
    }

    var style = {
      height: makeEm(height + depth)
    };

    if (width > 0) {
      style.width = makeEm(width);
    }

    if (depth > 0) {
      style.verticalAlign = makeEm(-depth);
    }

    var node = new Img(group.src, group.alt, style);
    node.height = height;
    node.depth = depth;
    return node;
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var node = new mathMLTree.MathNode("mglyph", []);
    node.setAttribute("alt", group.alt);
    var height = calculateSize(group.height, options);
    var depth = 0;

    if (group.totalheight.number > 0) {
      depth = calculateSize(group.totalheight, options) - height;
      node.setAttribute("valign", makeEm(-depth));
    }

    node.setAttribute("height", makeEm(height + depth));

    if (group.width.number > 0) {
      var width = calculateSize(group.width, options);
      node.setAttribute("width", makeEm(width));
    }

    node.setAttribute("src", group.src);
    return node;
  }
});
// Horizontal spacing commands




 // TODO: \hskip and \mskip should support plus and minus in lengths

defineFunction({
  type: "kern",
  names: ["\\kern", "\\mkern", "\\hskip", "\\mskip"],
  props: {
    numArgs: 1,
    argTypes: ["size"],
    primitive: true,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var size = assertNodeType(args[0], "size");

    if (parser.settings.strict) {
      var mathFunction = funcName[1] === 'm'; // \mkern, \mskip

      var muUnit = size.value.unit === 'mu';

      if (mathFunction) {
        if (!muUnit) {
          parser.settings.reportNonstrict("mathVsTextUnits", "LaTeX's " + funcName + " supports only mu units, " + ("not " + size.value.unit + " units"));
        }

        if (parser.mode !== "math") {
          parser.settings.reportNonstrict("mathVsTextUnits", "LaTeX's " + funcName + " works only in math mode");
        }
      } else {
        // !mathFunction
        if (muUnit) {
          parser.settings.reportNonstrict("mathVsTextUnits", "LaTeX's " + funcName + " doesn't support mu units");
        }
      }
    }

    return {
      type: "kern",
      mode: parser.mode,
      dimension: size.value
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    return buildCommon.makeGlue(group.dimension, options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var dimension = calculateSize(group.dimension, options);
    return new mathMLTree.SpaceNode(dimension);
  }
});
// Horizontal overlap functions






defineFunction({
  type: "lap",
  names: ["\\mathllap", "\\mathrlap", "\\mathclap"],
  props: {
    numArgs: 1,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var body = args[0];
    return {
      type: "lap",
      mode: parser.mode,
      alignment: funcName.slice(5),
      body: body
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // mathllap, mathrlap, mathclap
    var inner;

    if (group.alignment === "clap") {
      // ref: https://www.math.lsu.edu/~aperlis/publications/mathclap/
      inner = buildCommon.makeSpan([], [buildGroup(group.body, options)]); // wrap, since CSS will center a .clap > .inner > span

      inner = buildCommon.makeSpan(["inner"], [inner], options);
    } else {
      inner = buildCommon.makeSpan(["inner"], [buildGroup(group.body, options)]);
    }

    var fix = buildCommon.makeSpan(["fix"], []);
    var node = buildCommon.makeSpan([group.alignment], [inner, fix], options); // At this point, we have correctly set horizontal alignment of the
    // two items involved in the lap.
    // Next, use a strut to set the height of the HTML bounding box.
    // Otherwise, a tall argument may be misplaced.
    // This code resolved issue #1153

    var strut = buildCommon.makeSpan(["strut"]);
    strut.style.height = makeEm(node.height + node.depth);

    if (node.depth) {
      strut.style.verticalAlign = makeEm(-node.depth);
    }

    node.children.unshift(strut); // Next, prevent vertical misplacement when next to something tall.
    // This code resolves issue #1234

    node = buildCommon.makeSpan(["thinbox"], [node], options);
    return buildCommon.makeSpan(["mord", "vbox"], [node], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    // mathllap, mathrlap, mathclap
    var node = new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)]);

    if (group.alignment !== "rlap") {
      var offset = group.alignment === "llap" ? "-1" : "-0.5";
      node.setAttribute("lspace", offset + "width");
    }

    node.setAttribute("width", "0px");
    return node;
  }
});

 // Switching from text mode back to math mode

defineFunction({
  type: "styling",
  names: ["\\(", "$"],
  props: {
    numArgs: 0,
    allowedInText: true,
    allowedInMath: false
  },
  handler: function handler(_ref, args) {
    var funcName = _ref.funcName,
        parser = _ref.parser;
    var outerMode = parser.mode;
    parser.switchMode("math");
    var close = funcName === "\\(" ? "\\)" : "$";
    var body = parser.parseExpression(false, close);
    parser.expect(close);
    parser.switchMode(outerMode);
    return {
      type: "styling",
      mode: parser.mode,
      style: "text",
      body: body
    };
  }
}); // Check for extra closing math delimiters

defineFunction({
  type: "text",
  // Doesn't matter what this is.
  names: ["\\)", "\\]"],
  props: {
    numArgs: 0,
    allowedInText: true,
    allowedInMath: false
  },
  handler: function handler(context, args) {
    throw new src_ParseError("Mismatched " + context.funcName);
  }
});






var chooseMathStyle = function chooseMathStyle(group, options) {
  switch (options.style.size) {
    case src_Style.DISPLAY.size:
      return group.display;

    case src_Style.TEXT.size:
      return group.text;

    case src_Style.SCRIPT.size:
      return group.script;

    case src_Style.SCRIPTSCRIPT.size:
      return group.scriptscript;

    default:
      return group.text;
  }
};

defineFunction({
  type: "mathchoice",
  names: ["\\mathchoice"],
  props: {
    numArgs: 4,
    primitive: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    return {
      type: "mathchoice",
      mode: parser.mode,
      display: ordargument(args[0]),
      text: ordargument(args[1]),
      script: ordargument(args[2]),
      scriptscript: ordargument(args[3])
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var body = chooseMathStyle(group, options);
    var elements = buildExpression(body, options, false);
    return buildCommon.makeFragment(elements);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var body = chooseMathStyle(group, options);
    return buildExpressionRow(body, options);
  }
});



 // For an operator with limits, assemble the base, sup, and sub into a span.

var assembleSupSub = function assembleSupSub(base, supGroup, subGroup, options, style, slant, baseShift) {
  base = buildCommon.makeSpan([], [base]);
  var subIsSingleCharacter = subGroup && utils.isCharacterBox(subGroup);
  var sub;
  var sup; // We manually have to handle the superscripts and subscripts. This,
  // aside from the kern calculations, is copied from supsub.

  if (supGroup) {
    var elem = buildGroup(supGroup, options.havingStyle(style.sup()), options);
    sup = {
      elem: elem,
      kern: Math.max(options.fontMetrics().bigOpSpacing1, options.fontMetrics().bigOpSpacing3 - elem.depth)
    };
  }

  if (subGroup) {
    var _elem = buildGroup(subGroup, options.havingStyle(style.sub()), options);

    sub = {
      elem: _elem,
      kern: Math.max(options.fontMetrics().bigOpSpacing2, options.fontMetrics().bigOpSpacing4 - _elem.height)
    };
  } // Build the final group as a vlist of the possible subscript, base,
  // and possible superscript.


  var finalGroup;

  if (sup && sub) {
    var bottom = options.fontMetrics().bigOpSpacing5 + sub.elem.height + sub.elem.depth + sub.kern + base.depth + baseShift;
    finalGroup = buildCommon.makeVList({
      positionType: "bottom",
      positionData: bottom,
      children: [{
        type: "kern",
        size: options.fontMetrics().bigOpSpacing5
      }, {
        type: "elem",
        elem: sub.elem,
        marginLeft: makeEm(-slant)
      }, {
        type: "kern",
        size: sub.kern
      }, {
        type: "elem",
        elem: base
      }, {
        type: "kern",
        size: sup.kern
      }, {
        type: "elem",
        elem: sup.elem,
        marginLeft: makeEm(slant)
      }, {
        type: "kern",
        size: options.fontMetrics().bigOpSpacing5
      }]
    }, options);
  } else if (sub) {
    var top = base.height - baseShift; // Shift the limits by the slant of the symbol. Note
    // that we are supposed to shift the limits by 1/2 of the slant,
    // but since we are centering the limits adding a full slant of
    // margin will shift by 1/2 that.

    finalGroup = buildCommon.makeVList({
      positionType: "top",
      positionData: top,
      children: [{
        type: "kern",
        size: options.fontMetrics().bigOpSpacing5
      }, {
        type: "elem",
        elem: sub.elem,
        marginLeft: makeEm(-slant)
      }, {
        type: "kern",
        size: sub.kern
      }, {
        type: "elem",
        elem: base
      }]
    }, options);
  } else if (sup) {
    var _bottom = base.depth + baseShift;

    finalGroup = buildCommon.makeVList({
      positionType: "bottom",
      positionData: _bottom,
      children: [{
        type: "elem",
        elem: base
      }, {
        type: "kern",
        size: sup.kern
      }, {
        type: "elem",
        elem: sup.elem,
        marginLeft: makeEm(slant)
      }, {
        type: "kern",
        size: options.fontMetrics().bigOpSpacing5
      }]
    }, options);
  } else {
    // This case probably shouldn't occur (this would mean the
    // supsub was sending us a group with no superscript or
    // subscript) but be safe.
    return base;
  }

  var parts = [finalGroup];

  if (sub && slant !== 0 && !subIsSingleCharacter) {
    // A negative margin-left was applied to the lower limit.
    // Avoid an overlap by placing a spacer on the left on the group.
    var spacer = buildCommon.makeSpan(["mspace"], [], options);
    spacer.style.marginRight = makeEm(slant);
    parts.unshift(spacer);
  }

  return buildCommon.makeSpan(["mop", "op-limits"], parts, options);
};
// Limits, symbols











// Most operators have a large successor symbol, but these don't.
var noSuccessor = ["\\smallint"]; // NOTE: Unlike most `htmlBuilder`s, this one handles not only "op", but also
// "supsub" since some of them (like \int) can affect super/subscripting.

var op_htmlBuilder = function htmlBuilder(grp, options) {
  // Operators are handled in the TeXbook pg. 443-444, rule 13(a).
  var supGroup;
  var subGroup;
  var hasLimits = false;
  var group;

  if (grp.type === "supsub") {
    // If we have limits, supsub will pass us its group to handle. Pull
    // out the superscript and subscript and set the group to the op in
    // its base.
    supGroup = grp.sup;
    subGroup = grp.sub;
    group = assertNodeType(grp.base, "op");
    hasLimits = true;
  } else {
    group = assertNodeType(grp, "op");
  }

  var style = options.style;
  var large = false;

  if (style.size === src_Style.DISPLAY.size && group.symbol && !utils.contains(noSuccessor, group.name)) {
    // Most symbol operators get larger in displaystyle (rule 13)
    large = true;
  }

  var base;

  if (group.symbol) {
    // If this is a symbol, create the symbol.
    var fontName = large ? "Size2-Regular" : "Size1-Regular";
    var stash = "";

    if (group.name === "\\oiint" || group.name === "\\oiiint") {
      // No font glyphs yet, so use a glyph w/o the oval.
      // TODO: When font glyphs are available, delete this code.
      stash = group.name.substr(1);
      group.name = stash === "oiint" ? "\\iint" : "\\iiint";
    }

    base = buildCommon.makeSymbol(group.name, fontName, "math", options, ["mop", "op-symbol", large ? "large-op" : "small-op"]);

    if (stash.length > 0) {
      // We're in \oiint or \oiiint. Overlay the oval.
      // TODO: When font glyphs are available, delete this code.
      var italic = base.italic;
      var oval = buildCommon.staticSvg(stash + "Size" + (large ? "2" : "1"), options);
      base = buildCommon.makeVList({
        positionType: "individualShift",
        children: [{
          type: "elem",
          elem: base,
          shift: 0
        }, {
          type: "elem",
          elem: oval,
          shift: large ? 0.08 : 0
        }]
      }, options);
      group.name = "\\" + stash;
      base.classes.unshift("mop"); // $FlowFixMe

      base.italic = italic;
    }
  } else if (group.body) {
    // If this is a list, compose that list.
    var inner = buildExpression(group.body, options, true);

    if (inner.length === 1 && inner[0] instanceof SymbolNode) {
      base = inner[0];
      base.classes[0] = "mop"; // replace old mclass
    } else {
      base = buildCommon.makeSpan(["mop"], inner, options);
    }
  } else {
    // Otherwise, this is a text operator. Build the text from the
    // operator's name.
    var output = [];

    for (var i = 1; i < group.name.length; i++) {
      output.push(buildCommon.mathsym(group.name[i], group.mode, options));
    }

    base = buildCommon.makeSpan(["mop"], output, options);
  } // If content of op is a single symbol, shift it vertically.


  var baseShift = 0;
  var slant = 0;

  if ((base instanceof SymbolNode || group.name === "\\oiint" || group.name === "\\oiiint") && !group.suppressBaseShift) {
    // We suppress the shift of the base of \overset and \underset. Otherwise,
    // shift the symbol so its center lies on the axis (rule 13). It
    // appears that our fonts have the centers of the symbols already
    // almost on the axis, so these numbers are very small. Note we
    // don't actually apply this here, but instead it is used either in
    // the vlist creation or separately when there are no limits.
    baseShift = (base.height - base.depth) / 2 - options.fontMetrics().axisHeight; // The slant of the symbol is just its italic correction.
    // $FlowFixMe

    slant = base.italic;
  }

  if (hasLimits) {
    return assembleSupSub(base, supGroup, subGroup, options, style, slant, baseShift);
  } else {
    if (baseShift) {
      base.style.position = "relative";
      base.style.top = makeEm(baseShift);
    }

    return base;
  }
};

var op_mathmlBuilder = function mathmlBuilder(group, options) {
  var node;

  if (group.symbol) {
    // This is a symbol. Just add the symbol.
    node = new MathNode("mo", [makeText(group.name, group.mode)]);

    if (utils.contains(noSuccessor, group.name)) {
      node.setAttribute("largeop", "false");
    }
  } else if (group.body) {
    // This is an operator with children. Add them.
    node = new MathNode("mo", buildMathML_buildExpression(group.body, options));
  } else {
    // This is a text operator. Add all of the characters from the
    // operator's name.
    node = new MathNode("mi", [new TextNode(group.name.slice(1))]); // Append an <mo>&ApplyFunction;</mo>.
    // ref: https://www.w3.org/TR/REC-MathML/chap3_2.html#sec3.2.4

    var operator = new MathNode("mo", [makeText("\u2061", "text")]);

    if (group.parentIsSupSub) {
      node = new MathNode("mrow", [node, operator]);
    } else {
      node = newDocumentFragment([node, operator]);
    }
  }

  return node;
};

var singleCharBigOps = {
  "\u220F": "\\prod",
  "\u2210": "\\coprod",
  "\u2211": "\\sum",
  "\u22C0": "\\bigwedge",
  "\u22C1": "\\bigvee",
  "\u22C2": "\\bigcap",
  "\u22C3": "\\bigcup",
  "\u2A00": "\\bigodot",
  "\u2A01": "\\bigoplus",
  "\u2A02": "\\bigotimes",
  "\u2A04": "\\biguplus",
  "\u2A06": "\\bigsqcup"
};
defineFunction({
  type: "op",
  names: ["\\coprod", "\\bigvee", "\\bigwedge", "\\biguplus", "\\bigcap", "\\bigcup", "\\intop", "\\prod", "\\sum", "\\bigotimes", "\\bigoplus", "\\bigodot", "\\bigsqcup", "\\smallint", "\u220F", "\u2210", "\u2211", "\u22C0", "\u22C1", "\u22C2", "\u22C3", "\u2A00", "\u2A01", "\u2A02", "\u2A04", "\u2A06"],
  props: {
    numArgs: 0
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var fName = funcName;

    if (fName.length === 1) {
      fName = singleCharBigOps[fName];
    }

    return {
      type: "op",
      mode: parser.mode,
      limits: true,
      parentIsSupSub: false,
      symbol: true,
      name: fName
    };
  },
  htmlBuilder: op_htmlBuilder,
  mathmlBuilder: op_mathmlBuilder
}); // Note: calling defineFunction with a type that's already been defined only
// works because the same htmlBuilder and mathmlBuilder are being used.

defineFunction({
  type: "op",
  names: ["\\mathop"],
  props: {
    numArgs: 1,
    primitive: true
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser;
    var body = args[0];
    return {
      type: "op",
      mode: parser.mode,
      limits: false,
      parentIsSupSub: false,
      symbol: false,
      body: ordargument(body)
    };
  },
  htmlBuilder: op_htmlBuilder,
  mathmlBuilder: op_mathmlBuilder
}); // There are 2 flags for operators; whether they produce limits in
// displaystyle, and whether they are symbols and should grow in
// displaystyle. These four groups cover the four possible choices.

var singleCharIntegrals = {
  "\u222B": "\\int",
  "\u222C": "\\iint",
  "\u222D": "\\iiint",
  "\u222E": "\\oint",
  "\u222F": "\\oiint",
  "\u2230": "\\oiiint"
}; // No limits, not symbols

defineFunction({
  type: "op",
  names: ["\\arcsin", "\\arccos", "\\arctan", "\\arctg", "\\arcctg", "\\arg", "\\ch", "\\cos", "\\cosec", "\\cosh", "\\cot", "\\cotg", "\\coth", "\\csc", "\\ctg", "\\cth", "\\deg", "\\dim", "\\exp", "\\hom", "\\ker", "\\lg", "\\ln", "\\log", "\\sec", "\\sin", "\\sinh", "\\sh", "\\tan", "\\tanh", "\\tg", "\\th"],
  props: {
    numArgs: 0
  },
  handler: function handler(_ref3) {
    var parser = _ref3.parser,
        funcName = _ref3.funcName;
    return {
      type: "op",
      mode: parser.mode,
      limits: false,
      parentIsSupSub: false,
      symbol: false,
      name: funcName
    };
  },
  htmlBuilder: op_htmlBuilder,
  mathmlBuilder: op_mathmlBuilder
}); // Limits, not symbols

defineFunction({
  type: "op",
  names: ["\\det", "\\gcd", "\\inf", "\\lim", "\\max", "\\min", "\\Pr", "\\sup"],
  props: {
    numArgs: 0
  },
  handler: function handler(_ref4) {
    var parser = _ref4.parser,
        funcName = _ref4.funcName;
    return {
      type: "op",
      mode: parser.mode,
      limits: true,
      parentIsSupSub: false,
      symbol: false,
      name: funcName
    };
  },
  htmlBuilder: op_htmlBuilder,
  mathmlBuilder: op_mathmlBuilder
}); // No limits, symbols

defineFunction({
  type: "op",
  names: ["\\int", "\\iint", "\\iiint", "\\oint", "\\oiint", "\\oiiint", "\u222B", "\u222C", "\u222D", "\u222E", "\u222F", "\u2230"],
  props: {
    numArgs: 0
  },
  handler: function handler(_ref5) {
    var parser = _ref5.parser,
        funcName = _ref5.funcName;
    var fName = funcName;

    if (fName.length === 1) {
      fName = singleCharIntegrals[fName];
    }

    return {
      type: "op",
      mode: parser.mode,
      limits: false,
      parentIsSupSub: false,
      symbol: true,
      name: fName
    };
  },
  htmlBuilder: op_htmlBuilder,
  mathmlBuilder: op_mathmlBuilder
});


/**
 * All registered global/built-in macros.
 * `macros.js` exports this same dictionary again and makes it public.
 * `Parser.js` requires this dictionary via `macros.js`.
 */
var _macros = {}; // This function might one day accept an additional argument and do more things.

function defineMacro(name, body) {
  _macros[name] = body;
}









// NOTE: Unlike most `htmlBuilder`s, this one handles not only
// "operatorname", but also  "supsub" since \operatorname* can
// affect super/subscripting.
var operatorname_htmlBuilder = function htmlBuilder(grp, options) {
  // Operators are handled in the TeXbook pg. 443-444, rule 13(a).
  var supGroup;
  var subGroup;
  var hasLimits = false;
  var group;

  if (grp.type === "supsub") {
    // If we have limits, supsub will pass us its group to handle. Pull
    // out the superscript and subscript and set the group to the op in
    // its base.
    supGroup = grp.sup;
    subGroup = grp.sub;
    group = assertNodeType(grp.base, "operatorname");
    hasLimits = true;
  } else {
    group = assertNodeType(grp, "operatorname");
  }

  var base;

  if (group.body.length > 0) {
    var body = group.body.map(function (child) {
      // $FlowFixMe: Check if the node has a string `text` property.
      var childText = child.text;

      if (typeof childText === "string") {
        return {
          type: "textord",
          mode: child.mode,
          text: childText
        };
      } else {
        return child;
      }
    }); // Consolidate function names into symbol characters.

    var expression = buildExpression(body, options.withFont("mathrm"), true);

    for (var i = 0; i < expression.length; i++) {
      var child = expression[i];

      if (child instanceof SymbolNode) {
        // Per amsopn package,
        // change minus to hyphen and \ast to asterisk
        child.text = child.text.replace(/\u2212/, "-").replace(/\u2217/, "*");
      }
    }

    base = buildCommon.makeSpan(["mop"], expression, options);
  } else {
    base = buildCommon.makeSpan(["mop"], [], options);
  }

  if (hasLimits) {
    return assembleSupSub(base, supGroup, subGroup, options, options.style, 0, 0);
  } else {
    return base;
  }
};

var operatorname_mathmlBuilder = function mathmlBuilder(group, options) {
  // The steps taken here are similar to the html version.
  var expression = buildMathML_buildExpression(group.body, options.withFont("mathrm")); // Is expression a string or has it something like a fraction?

  var isAllString = true; // default

  for (var i = 0; i < expression.length; i++) {
    var node = expression[i];

    if (node instanceof mathMLTree.SpaceNode) ; else if (node instanceof mathMLTree.MathNode) {
      switch (node.type) {
        case "mi":
        case "mn":
        case "ms":
        case "mspace":
        case "mtext":
          break;
        // Do nothing yet.

        case "mo":
          {
            var child = node.children[0];

            if (node.children.length === 1 && child instanceof mathMLTree.TextNode) {
              child.text = child.text.replace(/\u2212/, "-").replace(/\u2217/, "*");
            } else {
              isAllString = false;
            }

            break;
          }

        default:
          isAllString = false;
      }
    } else {
      isAllString = false;
    }
  }

  if (isAllString) {
    // Write a single TextNode instead of multiple nested tags.
    var word = expression.map(function (node) {
      return node.toText();
    }).join("");
    expression = [new mathMLTree.TextNode(word)];
  }

  var identifier = new mathMLTree.MathNode("mi", expression);
  identifier.setAttribute("mathvariant", "normal"); // \u2061 is the same as &ApplyFunction;
  // ref: https://www.w3schools.com/charsets/ref_html_entities_a.asp

  var operator = new mathMLTree.MathNode("mo", [makeText("\u2061", "text")]);

  if (group.parentIsSupSub) {
    return new mathMLTree.MathNode("mrow", [identifier, operator]);
  } else {
    return mathMLTree.newDocumentFragment([identifier, operator]);
  }
}; // \operatorname
// amsopn.dtx: \mathop{#1\kern\z@\operator@font#3}\newmcodes@


defineFunction({
  type: "operatorname",
  names: ["\\operatorname@", "\\operatornamewithlimits"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var body = args[0];
    return {
      type: "operatorname",
      mode: parser.mode,
      body: ordargument(body),
      alwaysHandleSupSub: funcName === "\\operatornamewithlimits",
      limits: false,
      parentIsSupSub: false
    };
  },
  htmlBuilder: operatorname_htmlBuilder,
  mathmlBuilder: operatorname_mathmlBuilder
});
defineMacro("\\operatorname", "\\@ifstar\\operatornamewithlimits\\operatorname@");




defineFunctionBuilders({
  type: "ordgroup",
  htmlBuilder: function htmlBuilder(group, options) {
    if (group.semisimple) {
      return buildCommon.makeFragment(buildExpression(group.body, options, false));
    }

    return buildCommon.makeSpan(["mord"], buildExpression(group.body, options, true), options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    return buildExpressionRow(group.body, options, true);
  }
});





defineFunction({
  type: "overline",
  names: ["\\overline"],
  props: {
    numArgs: 1
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    var body = args[0];
    return {
      type: "overline",
      mode: parser.mode,
      body: body
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // Overlines are handled in the TeXbook pg 443, Rule 9.
    // Build the inner group in the cramped style.
    var innerGroup = buildGroup(group.body, options.havingCrampedStyle()); // Create the line above the body

    var line = buildCommon.makeLineSpan("overline-line", options); // Generate the vlist, with the appropriate kerns

    var defaultRuleThickness = options.fontMetrics().defaultRuleThickness;
    var vlist = buildCommon.makeVList({
      positionType: "firstBaseline",
      children: [{
        type: "elem",
        elem: innerGroup
      }, {
        type: "kern",
        size: 3 * defaultRuleThickness
      }, {
        type: "elem",
        elem: line
      }, {
        type: "kern",
        size: defaultRuleThickness
      }]
    }, options);
    return buildCommon.makeSpan(["mord", "overline"], [vlist], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var operator = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode("\u203E")]);
    operator.setAttribute("stretchy", "true");
    var node = new mathMLTree.MathNode("mover", [buildMathML_buildGroup(group.body, options), operator]);
    node.setAttribute("accent", "true");
    return node;
  }
});





defineFunction({
  type: "phantom",
  names: ["\\phantom"],
  props: {
    numArgs: 1,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    var body = args[0];
    return {
      type: "phantom",
      mode: parser.mode,
      body: ordargument(body)
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var elements = buildExpression(group.body, options.withPhantom(), false); // \phantom isn't supposed to affect the elements it contains.
    // See "color" for more details.

    return buildCommon.makeFragment(elements);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var inner = buildMathML_buildExpression(group.body, options);
    return new mathMLTree.MathNode("mphantom", inner);
  }
});
defineFunction({
  type: "hphantom",
  names: ["\\hphantom"],
  props: {
    numArgs: 1,
    allowedInText: true
  },
  handler: function handler(_ref2, args) {
    var parser = _ref2.parser;
    var body = args[0];
    return {
      type: "hphantom",
      mode: parser.mode,
      body: body
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var node = buildCommon.makeSpan([], [buildGroup(group.body, options.withPhantom())]);
    node.height = 0;
    node.depth = 0;

    if (node.children) {
      for (var i = 0; i < node.children.length; i++) {
        node.children[i].height = 0;
        node.children[i].depth = 0;
      }
    } // See smash for comment re: use of makeVList


    node = buildCommon.makeVList({
      positionType: "firstBaseline",
      children: [{
        type: "elem",
        elem: node
      }]
    }, options); // For spacing, TeX treats \smash as a math group (same spacing as ord).

    return buildCommon.makeSpan(["mord"], [node], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var inner = buildMathML_buildExpression(ordargument(group.body), options);
    var phantom = new mathMLTree.MathNode("mphantom", inner);
    var node = new mathMLTree.MathNode("mpadded", [phantom]);
    node.setAttribute("height", "0px");
    node.setAttribute("depth", "0px");
    return node;
  }
});
defineFunction({
  type: "vphantom",
  names: ["\\vphantom"],
  props: {
    numArgs: 1,
    allowedInText: true
  },
  handler: function handler(_ref3, args) {
    var parser = _ref3.parser;
    var body = args[0];
    return {
      type: "vphantom",
      mode: parser.mode,
      body: body
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var inner = buildCommon.makeSpan(["inner"], [buildGroup(group.body, options.withPhantom())]);
    var fix = buildCommon.makeSpan(["fix"], []);
    return buildCommon.makeSpan(["mord", "rlap"], [inner, fix], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var inner = buildMathML_buildExpression(ordargument(group.body), options);
    var phantom = new mathMLTree.MathNode("mphantom", inner);
    var node = new mathMLTree.MathNode("mpadded", [phantom]);
    node.setAttribute("width", "0px");
    return node;
  }
});






 // Box manipulation

defineFunction({
  type: "raisebox",
  names: ["\\raisebox"],
  props: {
    numArgs: 2,
    argTypes: ["size", "hbox"],
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    var amount = assertNodeType(args[0], "size").value;
    var body = args[1];
    return {
      type: "raisebox",
      mode: parser.mode,
      dy: amount,
      body: body
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var body = buildGroup(group.body, options);
    var dy = calculateSize(group.dy, options);
    return buildCommon.makeVList({
      positionType: "shift",
      positionData: -dy,
      children: [{
        type: "elem",
        elem: body
      }]
    }, options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var node = new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)]);
    var dy = group.dy.number + group.dy.unit;
    node.setAttribute("voffset", dy);
    return node;
  }
});





defineFunction({
  type: "rule",
  names: ["\\rule"],
  props: {
    numArgs: 2,
    numOptionalArgs: 1,
    argTypes: ["size", "size", "size"]
  },
  handler: function handler(_ref, args, optArgs) {
    var parser = _ref.parser;
    var shift = optArgs[0];
    var width = assertNodeType(args[0], "size");
    var height = assertNodeType(args[1], "size");
    return {
      type: "rule",
      mode: parser.mode,
      shift: shift && assertNodeType(shift, "size").value,
      width: width.value,
      height: height.value
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // Make an empty span for the rule
    var rule = buildCommon.makeSpan(["mord", "rule"], [], options); // Calculate the shift, width, and height of the rule, and account for units

    var width = calculateSize(group.width, options);
    var height = calculateSize(group.height, options);
    var shift = group.shift ? calculateSize(group.shift, options) : 0; // Style the rule to the right size

    rule.style.borderRightWidth = makeEm(width);
    rule.style.borderTopWidth = makeEm(height);
    rule.style.bottom = makeEm(shift); // Record the height and width

    rule.width = width;
    rule.height = height + shift;
    rule.depth = -shift; // Font size is the number large enough that the browser will
    // reserve at least `absHeight` space above the baseline.
    // The 1.125 factor was empirically determined

    rule.maxFontSize = height * 1.125 * options.sizeMultiplier;
    return rule;
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var width = calculateSize(group.width, options);
    var height = calculateSize(group.height, options);
    var shift = group.shift ? calculateSize(group.shift, options) : 0;
    var color = options.color && options.getColor() || "black";
    var rule = new mathMLTree.MathNode("mspace");
    rule.setAttribute("mathbackground", color);
    rule.setAttribute("width", makeEm(width));
    rule.setAttribute("height", makeEm(height));
    var wrapper = new mathMLTree.MathNode("mpadded", [rule]);

    if (shift >= 0) {
      wrapper.setAttribute("height", makeEm(shift));
    } else {
      wrapper.setAttribute("height", makeEm(shift));
      wrapper.setAttribute("depth", makeEm(-shift));
    }

    wrapper.setAttribute("voffset", makeEm(shift));
    return wrapper;
  }
});






function sizingGroup(value, options, baseOptions) {
  var inner = buildExpression(value, options, false);
  var multiplier = options.sizeMultiplier / baseOptions.sizeMultiplier; // Add size-resetting classes to the inner list and set maxFontSize
  // manually. Handle nested size changes.

  for (var i = 0; i < inner.length; i++) {
    var pos = inner[i].classes.indexOf("sizing");

    if (pos < 0) {
      Array.prototype.push.apply(inner[i].classes, options.sizingClasses(baseOptions));
    } else if (inner[i].classes[pos + 1] === "reset-size" + options.size) {
      // This is a nested size change: e.g., inner[i] is the "b" in
      // `\Huge a \small b`. Override the old size (the `reset-` class)
      // but not the new size.
      inner[i].classes[pos + 1] = "reset-size" + baseOptions.size;
    }

    inner[i].height *= multiplier;
    inner[i].depth *= multiplier;
  }

  return buildCommon.makeFragment(inner);
}
var sizeFuncs = ["\\tiny", "\\sixptsize", "\\scriptsize", "\\footnotesize", "\\small", "\\normalsize", "\\large", "\\Large", "\\LARGE", "\\huge", "\\Huge"];
var sizing_htmlBuilder = function htmlBuilder(group, options) {
  // Handle sizing operators like \Huge. Real TeX doesn't actually allow
  // these functions inside of math expressions, so we do some special
  // handling.
  var newOptions = options.havingSize(group.size);
  return sizingGroup(group.body, newOptions, options);
};
defineFunction({
  type: "sizing",
  names: sizeFuncs,
  props: {
    numArgs: 0,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var breakOnTokenText = _ref.breakOnTokenText,
        funcName = _ref.funcName,
        parser = _ref.parser;
    var body = parser.parseExpression(false, breakOnTokenText);
    return {
      type: "sizing",
      mode: parser.mode,
      // Figure out what size to use based on the list of functions above
      size: sizeFuncs.indexOf(funcName) + 1,
      body: body
    };
  },
  htmlBuilder: sizing_htmlBuilder,
  mathmlBuilder: function mathmlBuilder(group, options) {
    var newOptions = options.havingSize(group.size);
    var inner = buildMathML_buildExpression(group.body, newOptions);
    var node = new mathMLTree.MathNode("mstyle", inner); // TODO(emily): This doesn't produce the correct size for nested size
    // changes, because we don't keep state of what style we're currently
    // in, so we can't reset the size to normal before changing it.  Now
    // that we're passing an options parameter we should be able to fix
    // this.

    node.setAttribute("mathsize", makeEm(newOptions.sizeMultiplier));
    return node;
  }
});
// smash, with optional [tb], as in AMS






defineFunction({
  type: "smash",
  names: ["\\smash"],
  props: {
    numArgs: 1,
    numOptionalArgs: 1,
    allowedInText: true
  },
  handler: function handler(_ref, args, optArgs) {
    var parser = _ref.parser;
    var smashHeight = false;
    var smashDepth = false;
    var tbArg = optArgs[0] && assertNodeType(optArgs[0], "ordgroup");

    if (tbArg) {
      // Optional [tb] argument is engaged.
      // ref: amsmath: \renewcommand{\smash}[1][tb]{%
      //               def\mb@t{\ht}\def\mb@b{\dp}\def\mb@tb{\ht\z@\z@\dp}%
      var letter = "";

      for (var i = 0; i < tbArg.body.length; ++i) {
        var node = tbArg.body[i]; // $FlowFixMe: Not every node type has a `text` property.

        letter = node.text;

        if (letter === "t") {
          smashHeight = true;
        } else if (letter === "b") {
          smashDepth = true;
        } else {
          smashHeight = false;
          smashDepth = false;
          break;
        }
      }
    } else {
      smashHeight = true;
      smashDepth = true;
    }

    var body = args[0];
    return {
      type: "smash",
      mode: parser.mode,
      body: body,
      smashHeight: smashHeight,
      smashDepth: smashDepth
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var node = buildCommon.makeSpan([], [buildGroup(group.body, options)]);

    if (!group.smashHeight && !group.smashDepth) {
      return node;
    }

    if (group.smashHeight) {
      node.height = 0; // In order to influence makeVList, we have to reset the children.

      if (node.children) {
        for (var i = 0; i < node.children.length; i++) {
          node.children[i].height = 0;
        }
      }
    }

    if (group.smashDepth) {
      node.depth = 0;

      if (node.children) {
        for (var _i = 0; _i < node.children.length; _i++) {
          node.children[_i].depth = 0;
        }
      }
    } // At this point, we've reset the TeX-like height and depth values.
    // But the span still has an HTML line height.
    // makeVList applies "display: table-cell", which prevents the browser
    // from acting on that line height. So we'll call makeVList now.


    var smashedNode = buildCommon.makeVList({
      positionType: "firstBaseline",
      children: [{
        type: "elem",
        elem: node
      }]
    }, options); // For spacing, TeX treats \hphantom as a math group (same spacing as ord).

    return buildCommon.makeSpan(["mord"], [smashedNode], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var node = new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)]);

    if (group.smashHeight) {
      node.setAttribute("height", "0px");
    }

    if (group.smashDepth) {
      node.setAttribute("depth", "0px");
    }

    return node;
  }
});








defineFunction({
  type: "sqrt",
  names: ["\\sqrt"],
  props: {
    numArgs: 1,
    numOptionalArgs: 1
  },
  handler: function handler(_ref, args, optArgs) {
    var parser = _ref.parser;
    var index = optArgs[0];
    var body = args[0];
    return {
      type: "sqrt",
      mode: parser.mode,
      body: body,
      index: index
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // Square roots are handled in the TeXbook pg. 443, Rule 11.
    // First, we do the same steps as in overline to build the inner group
    // and line
    var inner = buildGroup(group.body, options.havingCrampedStyle());

    if (inner.height === 0) {
      // Render a small surd.
      inner.height = options.fontMetrics().xHeight;
    } // Some groups can return document fragments.  Handle those by wrapping
    // them in a span.


    inner = buildCommon.wrapFragment(inner, options); // Calculate the minimum size for the \surd delimiter

    var metrics = options.fontMetrics();
    var theta = metrics.defaultRuleThickness;
    var phi = theta;

    if (options.style.id < src_Style.TEXT.id) {
      phi = options.fontMetrics().xHeight;
    } // Calculate the clearance between the body and line


    var lineClearance = theta + phi / 4;
    var minDelimiterHeight = inner.height + inner.depth + lineClearance + theta; // Create a sqrt SVG of the required minimum size

    var _delimiter$sqrtImage = delimiter.sqrtImage(minDelimiterHeight, options),
        img = _delimiter$sqrtImage.span,
        ruleWidth = _delimiter$sqrtImage.ruleWidth,
        advanceWidth = _delimiter$sqrtImage.advanceWidth;

    var delimDepth = img.height - ruleWidth; // Adjust the clearance based on the delimiter size

    if (delimDepth > inner.height + inner.depth + lineClearance) {
      lineClearance = (lineClearance + delimDepth - inner.height - inner.depth) / 2;
    } // Shift the sqrt image


    var imgShift = img.height - inner.height - lineClearance - ruleWidth;
    inner.style.paddingLeft = makeEm(advanceWidth); // Overlay the image and the argument.

    var body = buildCommon.makeVList({
      positionType: "firstBaseline",
      children: [{
        type: "elem",
        elem: inner,
        wrapperClasses: ["svg-align"]
      }, {
        type: "kern",
        size: -(inner.height + imgShift)
      }, {
        type: "elem",
        elem: img
      }, {
        type: "kern",
        size: ruleWidth
      }]
    }, options);

    if (!group.index) {
      return buildCommon.makeSpan(["mord", "sqrt"], [body], options);
    } else {
      // Handle the optional root index
      // The index is always in scriptscript style
      var newOptions = options.havingStyle(src_Style.SCRIPTSCRIPT);
      var rootm = buildGroup(group.index, newOptions, options); // The amount the index is shifted by. This is taken from the TeX
      // source, in the definition of `\r@@t`.

      var toShift = 0.6 * (body.height - body.depth); // Build a VList with the superscript shifted up correctly

      var rootVList = buildCommon.makeVList({
        positionType: "shift",
        positionData: -toShift,
        children: [{
          type: "elem",
          elem: rootm
        }]
      }, options); // Add a class surrounding it so we can add on the appropriate
      // kerning

      var rootVListWrap = buildCommon.makeSpan(["root"], [rootVList]);
      return buildCommon.makeSpan(["mord", "sqrt"], [rootVListWrap, body], options);
    }
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var body = group.body,
        index = group.index;
    return index ? new mathMLTree.MathNode("mroot", [buildMathML_buildGroup(body, options), buildMathML_buildGroup(index, options)]) : new mathMLTree.MathNode("msqrt", [buildMathML_buildGroup(body, options)]);
  }
});





var styling_styleMap = {
  "display": src_Style.DISPLAY,
  "text": src_Style.TEXT,
  "script": src_Style.SCRIPT,
  "scriptscript": src_Style.SCRIPTSCRIPT
};
defineFunction({
  type: "styling",
  names: ["\\displaystyle", "\\textstyle", "\\scriptstyle", "\\scriptscriptstyle"],
  props: {
    numArgs: 0,
    allowedInText: true,
    primitive: true
  },
  handler: function handler(_ref, args) {
    var breakOnTokenText = _ref.breakOnTokenText,
        funcName = _ref.funcName,
        parser = _ref.parser;
    // parse out the implicit body
    var body = parser.parseExpression(true, breakOnTokenText); // TODO: Refactor to avoid duplicating styleMap in multiple places (e.g.
    // here and in buildHTML and de-dupe the enumeration of all the styles).
    // $FlowFixMe: The names above exactly match the styles.

    var style = funcName.slice(1, funcName.length - 5);
    return {
      type: "styling",
      mode: parser.mode,
      // Figure out what style to use by pulling out the style from
      // the function name
      style: style,
      body: body
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // Style changes are handled in the TeXbook on pg. 442, Rule 3.
    var newStyle = styling_styleMap[group.style];
    var newOptions = options.havingStyle(newStyle).withFont('');
    return sizingGroup(group.body, newOptions, options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    // Figure out what style we're changing to.
    var newStyle = styling_styleMap[group.style];
    var newOptions = options.havingStyle(newStyle);
    var inner = buildMathML_buildExpression(group.body, newOptions);
    var node = new mathMLTree.MathNode("mstyle", inner);
    var styleAttributes = {
      "display": ["0", "true"],
      "text": ["0", "false"],
      "script": ["1", "false"],
      "scriptscript": ["2", "false"]
    };
    var attr = styleAttributes[group.style];
    node.setAttribute("scriptlevel", attr[0]);
    node.setAttribute("displaystyle", attr[1]);
    return node;
  }
});














/**
 * Sometimes, groups perform special rules when they have superscripts or
 * subscripts attached to them. This function lets the `supsub` group know that
 * Sometimes, groups perform special rules when they have superscripts or
 * its inner element should handle the superscripts and subscripts instead of
 * handling them itself.
 */
var htmlBuilderDelegate = function htmlBuilderDelegate(group, options) {
  var base = group.base;

  if (!base) {
    return null;
  } else if (base.type === "op") {
    // Operators handle supsubs differently when they have limits
    // (e.g. `\displaystyle\sum_2^3`)
    var delegate = base.limits && (options.style.size === src_Style.DISPLAY.size || base.alwaysHandleSupSub);
    return delegate ? op_htmlBuilder : null;
  } else if (base.type === "operatorname") {
    var _delegate = base.alwaysHandleSupSub && (options.style.size === src_Style.DISPLAY.size || base.limits);

    return _delegate ? operatorname_htmlBuilder : null;
  } else if (base.type === "accent") {
    return utils.isCharacterBox(base.base) ? htmlBuilder : null;
  } else if (base.type === "horizBrace") {
    var isSup = !group.sub;
    return isSup === base.isOver ? horizBrace_htmlBuilder : null;
  } else {
    return null;
  }
}; // Super scripts and subscripts, whose precise placement can depend on other
// functions that precede them.


defineFunctionBuilders({
  type: "supsub",
  htmlBuilder: function htmlBuilder(group, options) {
    // Superscript and subscripts are handled in the TeXbook on page
    // 445-446, rules 18(a-f).
    // Here is where we defer to the inner group if it should handle
    // superscripts and subscripts itself.
    var builderDelegate = htmlBuilderDelegate(group, options);

    if (builderDelegate) {
      return builderDelegate(group, options);
    }

    var valueBase = group.base,
        valueSup = group.sup,
        valueSub = group.sub;
    var base = buildGroup(valueBase, options);
    var supm;
    var subm;
    var metrics = options.fontMetrics(); // Rule 18a

    var supShift = 0;
    var subShift = 0;
    var isCharacterBox = valueBase && utils.isCharacterBox(valueBase);

    if (valueSup) {
      var newOptions = options.havingStyle(options.style.sup());
      supm = buildGroup(valueSup, newOptions, options);

      if (!isCharacterBox) {
        supShift = base.height - newOptions.fontMetrics().supDrop * newOptions.sizeMultiplier / options.sizeMultiplier;
      }
    }

    if (valueSub) {
      var _newOptions = options.havingStyle(options.style.sub());

      subm = buildGroup(valueSub, _newOptions, options);

      if (!isCharacterBox) {
        subShift = base.depth + _newOptions.fontMetrics().subDrop * _newOptions.sizeMultiplier / options.sizeMultiplier;
      }
    } // Rule 18c


    var minSupShift;

    if (options.style === src_Style.DISPLAY) {
      minSupShift = metrics.sup1;
    } else if (options.style.cramped) {
      minSupShift = metrics.sup3;
    } else {
      minSupShift = metrics.sup2;
    } // scriptspace is a font-size-independent size, so scale it
    // appropriately for use as the marginRight.


    var multiplier = options.sizeMultiplier;
    var marginRight = makeEm(0.5 / metrics.ptPerEm / multiplier);
    var marginLeft = null;

    if (subm) {
      // Subscripts shouldn't be shifted by the base's italic correction.
      // Account for that by shifting the subscript back the appropriate
      // amount. Note we only do this when the base is a single symbol.
      var isOiint = group.base && group.base.type === "op" && group.base.name && (group.base.name === "\\oiint" || group.base.name === "\\oiiint");

      if (base instanceof SymbolNode || isOiint) {
        // $FlowFixMe
        marginLeft = makeEm(-base.italic);
      }
    }

    var supsub;

    if (supm && subm) {
      supShift = Math.max(supShift, minSupShift, supm.depth + 0.25 * metrics.xHeight);
      subShift = Math.max(subShift, metrics.sub2);
      var ruleWidth = metrics.defaultRuleThickness; // Rule 18e

      var maxWidth = 4 * ruleWidth;

      if (supShift - supm.depth - (subm.height - subShift) < maxWidth) {
        subShift = maxWidth - (supShift - supm.depth) + subm.height;
        var psi = 0.8 * metrics.xHeight - (supShift - supm.depth);

        if (psi > 0) {
          supShift += psi;
          subShift -= psi;
        }
      }

      var vlistElem = [{
        type: "elem",
        elem: subm,
        shift: subShift,
        marginRight: marginRight,
        marginLeft: marginLeft
      }, {
        type: "elem",
        elem: supm,
        shift: -supShift,
        marginRight: marginRight
      }];
      supsub = buildCommon.makeVList({
        positionType: "individualShift",
        children: vlistElem
      }, options);
    } else if (subm) {
      // Rule 18b
      subShift = Math.max(subShift, metrics.sub1, subm.height - 0.8 * metrics.xHeight);
      var _vlistElem = [{
        type: "elem",
        elem: subm,
        marginLeft: marginLeft,
        marginRight: marginRight
      }];
      supsub = buildCommon.makeVList({
        positionType: "shift",
        positionData: subShift,
        children: _vlistElem
      }, options);
    } else if (supm) {
      // Rule 18c, d
      supShift = Math.max(supShift, minSupShift, supm.depth + 0.25 * metrics.xHeight);
      supsub = buildCommon.makeVList({
        positionType: "shift",
        positionData: -supShift,
        children: [{
          type: "elem",
          elem: supm,
          marginRight: marginRight
        }]
      }, options);
    } else {
      throw new Error("supsub must have either sup or sub.");
    } // Wrap the supsub vlist in a span.msupsub to reset text-align.


    var mclass = getTypeOfDomTree(base, "right") || "mord";
    return buildCommon.makeSpan([mclass], [base, buildCommon.makeSpan(["msupsub"], [supsub])], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    // Is the inner group a relevant horizonal brace?
    var isBrace = false;
    var isOver;
    var isSup;

    if (group.base && group.base.type === "horizBrace") {
      isSup = !!group.sup;

      if (isSup === group.base.isOver) {
        isBrace = true;
        isOver = group.base.isOver;
      }
    }

    if (group.base && (group.base.type === "op" || group.base.type === "operatorname")) {
      group.base.parentIsSupSub = true;
    }

    var children = [buildMathML_buildGroup(group.base, options)];

    if (group.sub) {
      children.push(buildMathML_buildGroup(group.sub, options));
    }

    if (group.sup) {
      children.push(buildMathML_buildGroup(group.sup, options));
    }

    var nodeType;

    if (isBrace) {
      nodeType = isOver ? "mover" : "munder";
    } else if (!group.sub) {
      var base = group.base;

      if (base && base.type === "op" && base.limits && (options.style === src_Style.DISPLAY || base.alwaysHandleSupSub)) {
        nodeType = "mover";
      } else if (base && base.type === "operatorname" && base.alwaysHandleSupSub && (base.limits || options.style === src_Style.DISPLAY)) {
        nodeType = "mover";
      } else {
        nodeType = "msup";
      }
    } else if (!group.sup) {
      var _base = group.base;

      if (_base && _base.type === "op" && _base.limits && (options.style === src_Style.DISPLAY || _base.alwaysHandleSupSub)) {
        nodeType = "munder";
      } else if (_base && _base.type === "operatorname" && _base.alwaysHandleSupSub && (_base.limits || options.style === src_Style.DISPLAY)) {
        nodeType = "munder";
      } else {
        nodeType = "msub";
      }
    } else {
      var _base2 = group.base;

      if (_base2 && _base2.type === "op" && _base2.limits && options.style === src_Style.DISPLAY) {
        nodeType = "munderover";
      } else if (_base2 && _base2.type === "operatorname" && _base2.alwaysHandleSupSub && (options.style === src_Style.DISPLAY || _base2.limits)) {
        nodeType = "munderover";
      } else {
        nodeType = "msubsup";
      }
    }

    return new mathMLTree.MathNode(nodeType, children);
  }
});



 // Operator ParseNodes created in Parser.js from symbol Groups in src/symbols.js.

defineFunctionBuilders({
  type: "atom",
  htmlBuilder: function htmlBuilder(group, options) {
    return buildCommon.mathsym(group.text, group.mode, options, ["m" + group.family]);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var node = new mathMLTree.MathNode("mo", [makeText(group.text, group.mode)]);

    if (group.family === "bin") {
      var variant = getVariant(group, options);

      if (variant === "bold-italic") {
        node.setAttribute("mathvariant", variant);
      }
    } else if (group.family === "punct") {
      node.setAttribute("separator", "true");
    } else if (group.family === "open" || group.family === "close") {
      // Delims built here should not stretch vertically.
      // See delimsizing.js for stretchy delims.
      node.setAttribute("stretchy", "false");
    }

    return node;
  }
});




// "mathord" and "textord" ParseNodes created in Parser.js from symbol Groups in
// src/symbols.js.
var defaultVariant = {
  "mi": "italic",
  "mn": "normal",
  "mtext": "normal"
};
defineFunctionBuilders({
  type: "mathord",
  htmlBuilder: function htmlBuilder(group, options) {
    return buildCommon.makeOrd(group, options, "mathord");
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var node = new mathMLTree.MathNode("mi", [makeText(group.text, group.mode, options)]);
    var variant = getVariant(group, options) || "italic";

    if (variant !== defaultVariant[node.type]) {
      node.setAttribute("mathvariant", variant);
    }

    return node;
  }
});
defineFunctionBuilders({
  type: "textord",
  htmlBuilder: function htmlBuilder(group, options) {
    return buildCommon.makeOrd(group, options, "textord");
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var text = makeText(group.text, group.mode, options);
    var variant = getVariant(group, options) || "normal";
    var node;

    if (group.mode === 'text') {
      node = new mathMLTree.MathNode("mtext", [text]);
    } else if (/[0-9]/.test(group.text)) {
      node = new mathMLTree.MathNode("mn", [text]);
    } else if (group.text === "\\prime") {
      node = new mathMLTree.MathNode("mo", [text]);
    } else {
      node = new mathMLTree.MathNode("mi", [text]);
    }

    if (variant !== defaultVariant[node.type]) {
      node.setAttribute("mathvariant", variant);
    }

    return node;
  }
});



 // A map of CSS-based spacing functions to their CSS class.

var cssSpace = {
  "\\nobreak": "nobreak",
  "\\allowbreak": "allowbreak"
}; // A lookup table to determine whether a spacing function/symbol should be
// treated like a regular space character.  If a symbol or command is a key
// in this table, then it should be a regular space character.  Furthermore,
// the associated value may have a `className` specifying an extra CSS class
// to add to the created `span`.

var regularSpace = {
  " ": {},
  "\\ ": {},
  "~": {
    className: "nobreak"
  },
  "\\space": {},
  "\\nobreakspace": {
    className: "nobreak"
  }
}; // ParseNode<"spacing"> created in Parser.js from the "spacing" symbol Groups in
// src/symbols.js.

defineFunctionBuilders({
  type: "spacing",
  htmlBuilder: function htmlBuilder(group, options) {
    if (regularSpace.hasOwnProperty(group.text)) {
      var className = regularSpace[group.text].className || ""; // Spaces are generated by adding an actual space. Each of these
      // things has an entry in the symbols table, so these will be turned
      // into appropriate outputs.

      if (group.mode === "text") {
        var ord = buildCommon.makeOrd(group, options, "textord");
        ord.classes.push(className);
        return ord;
      } else {
        return buildCommon.makeSpan(["mspace", className], [buildCommon.mathsym(group.text, group.mode, options)], options);
      }
    } else if (cssSpace.hasOwnProperty(group.text)) {
      // Spaces based on just a CSS class.
      return buildCommon.makeSpan(["mspace", cssSpace[group.text]], [], options);
    } else {
      throw new src_ParseError("Unknown type of space \"" + group.text + "\"");
    }
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var node;

    if (regularSpace.hasOwnProperty(group.text)) {
      node = new mathMLTree.MathNode("mtext", [new mathMLTree.TextNode("\xA0")]);
    } else if (cssSpace.hasOwnProperty(group.text)) {
      // CSS-based MathML spaces (\nobreak, \allowbreak) are ignored
      return new mathMLTree.MathNode("mspace");
    } else {
      throw new src_ParseError("Unknown type of space \"" + group.text + "\"");
    }

    return node;
  }
});




var pad = function pad() {
  var padNode = new mathMLTree.MathNode("mtd", []);
  padNode.setAttribute("width", "50%");
  return padNode;
};

defineFunctionBuilders({
  type: "tag",
  mathmlBuilder: function mathmlBuilder(group, options) {
    var table = new mathMLTree.MathNode("mtable", [new mathMLTree.MathNode("mtr", [pad(), new mathMLTree.MathNode("mtd", [buildExpressionRow(group.body, options)]), pad(), new mathMLTree.MathNode("mtd", [buildExpressionRow(group.tag, options)])])]);
    table.setAttribute("width", "100%");
    return table; // TODO: Left-aligned tags.
    // Currently, the group and options passed here do not contain
    // enough info to set tag alignment. `leqno` is in Settings but it is
    // not passed to Options. On the HTML side, leqno is
    // set by a CSS class applied in buildTree.js. That would have worked
    // in MathML if browsers supported <mlabeledtr>. Since they don't, we
    // need to rewrite the way this function is called.
  }
});



 // Non-mathy text, possibly in a font

var textFontFamilies = {
  "\\text": undefined,
  "\\textrm": "textrm",
  "\\textsf": "textsf",
  "\\texttt": "texttt",
  "\\textnormal": "textrm"
};
var textFontWeights = {
  "\\textbf": "textbf",
  "\\textmd": "textmd"
};
var textFontShapes = {
  "\\textit": "textit",
  "\\textup": "textup"
};

var optionsWithFont = function optionsWithFont(group, options) {
  var font = group.font; // Checks if the argument is a font family or a font style.

  if (!font) {
    return options;
  } else if (textFontFamilies[font]) {
    return options.withTextFontFamily(textFontFamilies[font]);
  } else if (textFontWeights[font]) {
    return options.withTextFontWeight(textFontWeights[font]);
  } else {
    return options.withTextFontShape(textFontShapes[font]);
  }
};

defineFunction({
  type: "text",
  names: [// Font families
  "\\text", "\\textrm", "\\textsf", "\\texttt", "\\textnormal", // Font weights
  "\\textbf", "\\textmd", // Font Shapes
  "\\textit", "\\textup"],
  props: {
    numArgs: 1,
    argTypes: ["text"],
    allowedInArgument: true,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser,
        funcName = _ref.funcName;
    var body = args[0];
    return {
      type: "text",
      mode: parser.mode,
      body: ordargument(body),
      font: funcName
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var newOptions = optionsWithFont(group, options);
    var inner = buildExpression(group.body, newOptions, true);
    return buildCommon.makeSpan(["mord", "text"], inner, newOptions);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var newOptions = optionsWithFont(group, options);
    return buildExpressionRow(group.body, newOptions);
  }
});





defineFunction({
  type: "underline",
  names: ["\\underline"],
  props: {
    numArgs: 1,
    allowedInText: true
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    return {
      type: "underline",
      mode: parser.mode,
      body: args[0]
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    // Underlines are handled in the TeXbook pg 443, Rule 10.
    // Build the inner group.
    var innerGroup = buildGroup(group.body, options); // Create the line to go below the body

    var line = buildCommon.makeLineSpan("underline-line", options); // Generate the vlist, with the appropriate kerns

    var defaultRuleThickness = options.fontMetrics().defaultRuleThickness;
    var vlist = buildCommon.makeVList({
      positionType: "top",
      positionData: innerGroup.height,
      children: [{
        type: "kern",
        size: defaultRuleThickness
      }, {
        type: "elem",
        elem: line
      }, {
        type: "kern",
        size: 3 * defaultRuleThickness
      }, {
        type: "elem",
        elem: innerGroup
      }]
    }, options);
    return buildCommon.makeSpan(["mord", "underline"], [vlist], options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var operator = new mathMLTree.MathNode("mo", [new mathMLTree.TextNode("\u203E")]);
    operator.setAttribute("stretchy", "true");
    var node = new mathMLTree.MathNode("munder", [buildMathML_buildGroup(group.body, options), operator]);
    node.setAttribute("accentunder", "true");
    return node;
  }
});




 // \vcenter:  Vertically center the argument group on the math axis.

defineFunction({
  type: "vcenter",
  names: ["\\vcenter"],
  props: {
    numArgs: 1,
    argTypes: ["original"],
    // In LaTeX, \vcenter can act only on a box.
    allowedInText: false
  },
  handler: function handler(_ref, args) {
    var parser = _ref.parser;
    return {
      type: "vcenter",
      mode: parser.mode,
      body: args[0]
    };
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var body = buildGroup(group.body, options);
    var axisHeight = options.fontMetrics().axisHeight;
    var dy = 0.5 * (body.height - axisHeight - (body.depth + axisHeight));
    return buildCommon.makeVList({
      positionType: "shift",
      positionData: dy,
      children: [{
        type: "elem",
        elem: body
      }]
    }, options);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    // There is no way to do this in MathML.
    // Write a class as a breadcrumb in case some post-processor wants
    // to perform a vcenter adjustment.
    return new mathMLTree.MathNode("mpadded", [buildMathML_buildGroup(group.body, options)], ["vcenter"]);
  }
});




defineFunction({
  type: "verb",
  names: ["\\verb"],
  props: {
    numArgs: 0,
    allowedInText: true
  },
  handler: function handler(context, args, optArgs) {
    // \verb and \verb* are dealt with directly in Parser.js.
    // If we end up here, it's because of a failure to match the two delimiters
    // in the regex in Lexer.js.  LaTeX raises the following error when \verb is
    // terminated by end of line (or file).
    throw new src_ParseError("\\verb ended by end of line instead of matching delimiter");
  },
  htmlBuilder: function htmlBuilder(group, options) {
    var text = makeVerb(group);
    var body = []; // \verb enters text mode and therefore is sized like \textstyle

    var newOptions = options.havingStyle(options.style.text());

    for (var i = 0; i < text.length; i++) {
      var c = text[i];

      if (c === '~') {
        c = '\\textasciitilde';
      }

      body.push(buildCommon.makeSymbol(c, "Typewriter-Regular", group.mode, newOptions, ["mord", "texttt"]));
    }

    return buildCommon.makeSpan(["mord", "text"].concat(newOptions.sizingClasses(options)), buildCommon.tryCombineChars(body), newOptions);
  },
  mathmlBuilder: function mathmlBuilder(group, options) {
    var text = new mathMLTree.TextNode(makeVerb(group));
    var node = new mathMLTree.MathNode("mtext", [text]);
    node.setAttribute("mathvariant", "monospace");
    return node;
  }
});
/**
 * Converts verb group into body string.
 *
 * \verb* replaces each space with an open box \u2423
 * \verb replaces each space with a no-break space \xA0
 */

var makeVerb = function makeVerb(group) {
  return group.body.replace(/ /g, group.star ? "\u2423" : '\xA0');
};
/** Include this to ensure that all functions are defined. */

var functions = _functions;
/* harmony default export */ var src_functions = (functions); // TODO(kevinb): have functions return an object and call defineFunction with
/**
 * Lexing or parsing positional information for error reporting.
 * This object is immutable.
 */
var SourceLocation = /*#__PURE__*/function () {
  // The + prefix indicates that these fields aren't writeable
  // Lexer holding the input string.
  // Start offset, zero-based inclusive.
  // End offset, zero-based exclusive.
  function SourceLocation(lexer, start, end) {
    this.lexer = void 0;
    this.start = void 0;
    this.end = void 0;
    this.lexer = lexer;
    this.start = start;
    this.end = end;
  }
  /**
   * Merges two `SourceLocation`s from location providers, given they are
   * provided in order of appearance.
   * - Returns the first one's location if only the first is provided.
   * - Returns a merged range of the first and the last if both are provided
   *   and their lexers match.
   * - Otherwise, returns null.
   */


  SourceLocation.range = function range(first, second) {
    if (!second) {
      return first && first.loc;
    } else if (!first || !first.loc || !second.loc || first.loc.lexer !== second.loc.lexer) {
      return null;
    } else {
      return new SourceLocation(first.loc.lexer, first.loc.start, second.loc.end);
    }
  };

  return SourceLocation;
}();

/**
 * Interface required to break circular dependency between Token, Lexer, and
 * ParseError.
 */

/**
 * The resulting token returned from `lex`.
 *
 * It consists of the token text plus some position information.
 * The position information is essentially a range in an input string,
 * but instead of referencing the bare input string, we refer to the lexer.
 * That way it is possible to attach extra metadata to the input string,
 * like for example a file name or similar.
 *
 * The position information is optional, so it is OK to construct synthetic
 * tokens if appropriate. Not providing available position information may
 * lead to degraded error reporting, though.
 */
var Token = /*#__PURE__*/function () {
  // don't expand the token
  // used in \noexpand
  function Token(text, // the text of this token
  loc) {
    this.text = void 0;
    this.loc = void 0;
    this.noexpand = void 0;
    this.treatAsRelax = void 0;
    this.text = text;
    this.loc = loc;
  }
  /**
   * Given a pair of tokens (this and endToken), compute a `Token` encompassing
   * the whole input range enclosed by these two.
   */


  var _proto = Token.prototype;

  _proto.range = function range(endToken, // last token of the range, inclusive
  text // the text of the newly constructed token
  ) {
    return new Token(text, SourceLocation.range(this, endToken));
  };

  return Token;
}();
/**
 * The Lexer class handles tokenizing the input in various ways. Since our
 * parser expects us to be able to backtrack, the lexer allows lexing from any
 * given starting point.
 *
 * Its main exposed function is the `lex` function, which takes a position to
 * lex from and a type of token to lex. It defers to the appropriate `_innerLex`
 * function.
 *
 * The various `_innerLex` functions perform the actual lexing of different
 * kinds.
 */




/* The following tokenRegex
 * - matches typical whitespace (but not NBSP etc.) using its first group
 * - does not match any control character \x00-\x1f except whitespace
 * - does not match a bare backslash
 * - matches any ASCII character except those just mentioned
 * - does not match the BMP private use area \uE000-\uF8FF
 * - does not match bare surrogate code units
 * - matches any BMP character except for those just described
 * - matches any valid Unicode surrogate pair
 * - matches a backslash followed by one or more whitespace characters
 * - matches a backslash followed by one or more letters then whitespace
 * - matches a backslash followed by any BMP character
 * Capturing groups:
 *   [1] regular whitespace
 *   [2] backslash followed by whitespace
 *   [3] anything else, which may include:
 *     [4] left character of \verb*
 *     [5] left character of \verb
 *     [6] backslash followed by word, excluding any trailing whitespace
 * Just because the Lexer matches something doesn't mean it's valid input:
 * If there is no matching function or symbol definition, the Parser will
 * still reject the input.
 */
var spaceRegexString = "[ \r\n\t]";
var controlWordRegexString = "\\\\[a-zA-Z@]+";
var controlSymbolRegexString = "\\\\[^\uD800-\uDFFF]";
var controlWordWhitespaceRegexString = "(" + controlWordRegexString + ")" + spaceRegexString + "*";
var controlSpaceRegexString = "\\\\(\n|[ \r\t]+\n?)[ \r\t]*";
var combiningDiacriticalMarkString = "[\u0300-\u036F]";
var combiningDiacriticalMarksEndRegex = new RegExp(combiningDiacriticalMarkString + "+$");
var tokenRegexString = "(" + spaceRegexString + "+)|" + ( // whitespace
controlSpaceRegexString + "|") + // \whitespace
"([!-\\[\\]-\u2027\u202A-\uD7FF\uF900-\uFFFF]" + ( // single codepoint
combiningDiacriticalMarkString + "*") + // ...plus accents
"|[\uD800-\uDBFF][\uDC00-\uDFFF]" + ( // surrogate pair
combiningDiacriticalMarkString + "*") + // ...plus accents
"|\\\\verb\\*([^]).*?\\4" + // \verb*
"|\\\\verb([^*a-zA-Z]).*?\\5" + ( // \verb unstarred
"|" + controlWordWhitespaceRegexString) + ( // \macroName + spaces
"|" + controlSymbolRegexString + ")"); // \\, \', etc.

/** Main Lexer class */

var Lexer = /*#__PURE__*/function () {
  // Category codes. The lexer only supports comment characters (14) for now.
  // MacroExpander additionally distinguishes active (13).
  function Lexer(input, settings) {
    this.input = void 0;
    this.settings = void 0;
    this.tokenRegex = void 0;
    this.catcodes = void 0;
    // Separate accents from characters
    this.input = input;
    this.settings = settings;
    this.tokenRegex = new RegExp(tokenRegexString, 'g');
    this.catcodes = {
      "%": 14,
      // comment character
      "~": 13 // active character

    };
  }

  var _proto = Lexer.prototype;

  _proto.setCatcode = function setCatcode(char, code) {
    this.catcodes[char] = code;
  }
  /**
   * This function lexes a single token.
   */
  ;

  _proto.lex = function lex() {
    var input = this.input;
    var pos = this.tokenRegex.lastIndex;

    if (pos === input.length) {
      return new Token("EOF", new SourceLocation(this, pos, pos));
    }

    var match = this.tokenRegex.exec(input);

    if (match === null || match.index !== pos) {
      throw new src_ParseError("Unexpected character: '" + input[pos] + "'", new Token(input[pos], new SourceLocation(this, pos, pos + 1)));
    }

    var text = match[6] || match[3] || (match[2] ? "\\ " : " ");

    if (this.catcodes[text] === 14) {
      // comment character
      var nlIndex = input.indexOf('\n', this.tokenRegex.lastIndex);

      if (nlIndex === -1) {
        this.tokenRegex.lastIndex = input.length; // EOF

        this.settings.reportNonstrict("commentAtEnd", "% comment has no terminating newline; LaTeX would " + "fail because of commenting the end of math mode (e.g. $)");
      } else {
        this.tokenRegex.lastIndex = nlIndex + 1;
      }

      return this.lex();
    }

    return new Token(text, new SourceLocation(this, pos, this.tokenRegex.lastIndex));
  };

  return Lexer;
}();
/**
 * A `Namespace` refers to a space of nameable things like macros or lengths,
 * which can be `set` either globally or local to a nested group, using an
 * undo stack similar to how TeX implements this functionality.
 * Performance-wise, `get` and local `set` take constant time, while global
 * `set` takes time proportional to the depth of group nesting.
 */


var Namespace = /*#__PURE__*/function () {
  /**
   * Both arguments are optional.  The first argument is an object of
   * built-in mappings which never change.  The second argument is an object
   * of initial (global-level) mappings, which will constantly change
   * according to any global/top-level `set`s done.
   */
  function Namespace(builtins, globalMacros) {
    if (builtins === void 0) {
      builtins = {};
    }

    if (globalMacros === void 0) {
      globalMacros = {};
    }

    this.current = void 0;
    this.builtins = void 0;
    this.undefStack = void 0;
    this.current = globalMacros;
    this.builtins = builtins;
    this.undefStack = [];
  }
  /**
   * Start a new nested group, affecting future local `set`s.
   */


  var _proto = Namespace.prototype;

  _proto.beginGroup = function beginGroup() {
    this.undefStack.push({});
  }
  /**
   * End current nested group, restoring values before the group began.
   */
  ;

  _proto.endGroup = function endGroup() {
    if (this.undefStack.length === 0) {
      throw new src_ParseError("Unbalanced namespace destruction: attempt " + "to pop global namespace; please report this as a bug");
    }

    var undefs = this.undefStack.pop();

    for (var undef in undefs) {
      if (undefs.hasOwnProperty(undef)) {
        if (undefs[undef] === undefined) {
          delete this.current[undef];
        } else {
          this.current[undef] = undefs[undef];
        }
      }
    }
  }
  /**
   * Ends all currently nested groups (if any), restoring values before the
   * groups began.  Useful in case of an error in the middle of parsing.
   */
  ;

  _proto.endGroups = function endGroups() {
    while (this.undefStack.length > 0) {
      this.endGroup();
    }
  }
  /**
   * Detect whether `name` has a definition.  Equivalent to
   * `get(name) != null`.
   */
  ;

  _proto.has = function has(name) {
    return this.current.hasOwnProperty(name) || this.builtins.hasOwnProperty(name);
  }
  /**
   * Get the current value of a name, or `undefined` if there is no value.
   *
   * Note: Do not use `if (namespace.get(...))` to detect whether a macro
   * is defined, as the definition may be the empty string which evaluates
   * to `false` in JavaScript.  Use `if (namespace.get(...) != null)` or
   * `if (namespace.has(...))`.
   */
  ;

  _proto.get = function get(name) {
    if (this.current.hasOwnProperty(name)) {
      return this.current[name];
    } else {
      return this.builtins[name];
    }
  }
  /**
   * Set the current value of a name, and optionally set it globally too.
   * Local set() sets the current value and (when appropriate) adds an undo
   * operation to the undo stack.  Global set() may change the undo
   * operation at every level, so takes time linear in their number.
   */
  ;

  _proto.set = function set(name, value, global) {
    if (global === void 0) {
      global = false;
    }

    if (global) {
      // Global set is equivalent to setting in all groups.  Simulate this
      // by destroying any undos currently scheduled for this name,
      // and adding an undo with the *new* value (in case it later gets
      // locally reset within this environment).
      for (var i = 0; i < this.undefStack.length; i++) {
        delete this.undefStack[i][name];
      }

      if (this.undefStack.length > 0) {
        this.undefStack[this.undefStack.length - 1][name] = value;
      }
    } else {
      // Undo this set at end of this group (possibly to `undefined`),
      // unless an undo is already in place, in which case that older
      // value is the correct one.
      var top = this.undefStack[this.undefStack.length - 1];

      if (top && !top.hasOwnProperty(name)) {
        top[name] = this.current[name];
      }
    }

    this.current[name] = value;
  };

  return Namespace;
}();
/**
 * Predefined macros for KaTeX.
 * This can be used to define some commands in terms of others.
 */
// Export global macros object from defineMacro

var macros = _macros;
/* harmony default export */ var src_macros = (macros);





 //////////////////////////////////////////////////////////////////////
// macro tools

defineMacro("\\noexpand", function (context) {
  // The expansion is the token itself; but that token is interpreted
  // as if its meaning were ‘\relax’ if it is a control sequence that
  // would ordinarily be expanded by TeX’s expansion rules.
  var t = context.popToken();

  if (context.isExpandable(t.text)) {
    t.noexpand = true;
    t.treatAsRelax = true;
  }

  return {
    tokens: [t],
    numArgs: 0
  };
});
defineMacro("\\expandafter", function (context) {
  // TeX first reads the token that comes immediately after \expandafter,
  // without expanding it; let’s call this token t. Then TeX reads the
  // token that comes after t (and possibly more tokens, if that token
  // has an argument), replacing it by its expansion. Finally TeX puts
  // t back in front of that expansion.
  var t = context.popToken();
  context.expandOnce(true); // expand only an expandable token

  return {
    tokens: [t],
    numArgs: 0
  };
}); // LaTeX's \@firstoftwo{#1}{#2} expands to #1, skipping #2
// TeX source: \long\def\@firstoftwo#1#2{#1}

defineMacro("\\@firstoftwo", function (context) {
  var args = context.consumeArgs(2);
  return {
    tokens: args[0],
    numArgs: 0
  };
}); // LaTeX's \@secondoftwo{#1}{#2} expands to #2, skipping #1
// TeX source: \long\def\@secondoftwo#1#2{#2}

defineMacro("\\@secondoftwo", function (context) {
  var args = context.consumeArgs(2);
  return {
    tokens: args[1],
    numArgs: 0
  };
}); // LaTeX's \@ifnextchar{#1}{#2}{#3} looks ahead to the next (unexpanded)
// symbol that isn't a space, consuming any spaces but not consuming the
// first nonspace character.  If that nonspace character matches #1, then
// the macro expands to #2; otherwise, it expands to #3.

defineMacro("\\@ifnextchar", function (context) {
  var args = context.consumeArgs(3); // symbol, if, else

  context.consumeSpaces();
  var nextToken = context.future();

  if (args[0].length === 1 && args[0][0].text === nextToken.text) {
    return {
      tokens: args[1],
      numArgs: 0
    };
  } else {
    return {
      tokens: args[2],
      numArgs: 0
    };
  }
}); // LaTeX's \@ifstar{#1}{#2} looks ahead to the next (unexpanded) symbol.
// If it is `*`, then it consumes the symbol, and the macro expands to #1;
// otherwise, the macro expands to #2 (without consuming the symbol).
// TeX source: \def\@ifstar#1{\@ifnextchar *{\@firstoftwo{#1}}}

defineMacro("\\@ifstar", "\\@ifnextchar *{\\@firstoftwo{#1}}"); // LaTeX's \TextOrMath{#1}{#2} expands to #1 in text mode, #2 in math mode

defineMacro("\\TextOrMath", function (context) {
  var args = context.consumeArgs(2);

  if (context.mode === 'text') {
    return {
      tokens: args[0],
      numArgs: 0
    };
  } else {
    return {
      tokens: args[1],
      numArgs: 0
    };
  }
}); // Lookup table for parsing numbers in base 8 through 16

var digitToNumber = {
  "0": 0,
  "1": 1,
  "2": 2,
  "3": 3,
  "4": 4,
  "5": 5,
  "6": 6,
  "7": 7,
  "8": 8,
  "9": 9,
  "a": 10,
  "A": 10,
  "b": 11,
  "B": 11,
  "c": 12,
  "C": 12,
  "d": 13,
  "D": 13,
  "e": 14,
  "E": 14,
  "f": 15,
  "F": 15
}; // TeX \char makes a literal character (catcode 12) using the following forms:
// (see The TeXBook, p. 43)
//   \char123  -- decimal
//   \char'123 -- octal
//   \char"123 -- hex
//   \char`x   -- character that can be written (i.e. isn't active)
//   \char`\x  -- character that cannot be written (e.g. %)
// These all refer to characters from the font, so we turn them into special
// calls to a function \@char dealt with in the Parser.

defineMacro("\\char", function (context) {
  var token = context.popToken();
  var base;
  var number = '';

  if (token.text === "'") {
    base = 8;
    token = context.popToken();
  } else if (token.text === '"') {
    base = 16;
    token = context.popToken();
  } else if (token.text === "`") {
    token = context.popToken();

    if (token.text[0] === "\\") {
      number = token.text.charCodeAt(1);
    } else if (token.text === "EOF") {
      throw new src_ParseError("\\char` missing argument");
    } else {
      number = token.text.charCodeAt(0);
    }
  } else {
    base = 10;
  }

  if (base) {
    // Parse a number in the given base, starting with first `token`.
    number = digitToNumber[token.text];

    if (number == null || number >= base) {
      throw new src_ParseError("Invalid base-" + base + " digit " + token.text);
    }

    var digit;

    while ((digit = digitToNumber[context.future().text]) != null && digit < base) {
      number *= base;
      number += digit;
      context.popToken();
    }
  }

  return "\\@char{" + number + "}";
}); // \newcommand{\macro}[args]{definition}
// \renewcommand{\macro}[args]{definition}
// TODO: Optional arguments: \newcommand{\macro}[args][default]{definition}

var newcommand = function newcommand(context, existsOK, nonexistsOK) {
  var arg = context.consumeArg().tokens;

  if (arg.length !== 1) {
    throw new src_ParseError("\\newcommand's first argument must be a macro name");
  }

  var name = arg[0].text;
  var exists = context.isDefined(name);

  if (exists && !existsOK) {
    throw new src_ParseError("\\newcommand{" + name + "} attempting to redefine " + (name + "; use \\renewcommand"));
  }

  if (!exists && !nonexistsOK) {
    throw new src_ParseError("\\renewcommand{" + name + "} when command " + name + " " + "does not yet exist; use \\newcommand");
  }

  var numArgs = 0;
  arg = context.consumeArg().tokens;

  if (arg.length === 1 && arg[0].text === "[") {
    var argText = '';
    var token = context.expandNextToken();

    while (token.text !== "]" && token.text !== "EOF") {
      // TODO: Should properly expand arg, e.g., ignore {}s
      argText += token.text;
      token = context.expandNextToken();
    }

    if (!argText.match(/^\s*[0-9]+\s*$/)) {
      throw new src_ParseError("Invalid number of arguments: " + argText);
    }

    numArgs = parseInt(argText);
    arg = context.consumeArg().tokens;
  } // Final arg is the expansion of the macro


  context.macros.set(name, {
    tokens: arg,
    numArgs: numArgs
  });
  return '';
};

defineMacro("\\newcommand", function (context) {
  return newcommand(context, false, true);
});
defineMacro("\\renewcommand", function (context) {
  return newcommand(context, true, false);
});
defineMacro("\\providecommand", function (context) {
  return newcommand(context, true, true);
}); // terminal (console) tools

defineMacro("\\message", function (context) {
  var arg = context.consumeArgs(1)[0]; // eslint-disable-next-line no-console

  console.log(arg.reverse().map(function (token) {
    return token.text;
  }).join(""));
  return '';
});
defineMacro("\\errmessage", function (context) {
  var arg = context.consumeArgs(1)[0]; // eslint-disable-next-line no-console

  console.error(arg.reverse().map(function (token) {
    return token.text;
  }).join(""));
  return '';
});
defineMacro("\\show", function (context) {
  var tok = context.popToken();
  var name = tok.text; // eslint-disable-next-line no-console

  console.log(tok, context.macros.get(name), src_functions[name], src_symbols.math[name], src_symbols.text[name]);
  return '';
}); //////////////////////////////////////////////////////////////////////
// Grouping
// \let\bgroup={ \let\egroup=}

defineMacro("\\bgroup", "{");
defineMacro("\\egroup", "}"); // Symbols from latex.ltx:
// \def~{\nobreakspace{}}
// \def\lq{`}
// \def\rq{'}
// \def \aa {\r a}
// \def \AA {\r A}

defineMacro("~", "\\nobreakspace");
defineMacro("\\lq", "`");
defineMacro("\\rq", "'");
defineMacro("\\aa", "\\r a");
defineMacro("\\AA", "\\r A"); // Copyright (C) and registered (R) symbols. Use raw symbol in MathML.
// \DeclareTextCommandDefault{\textcopyright}{\textcircled{c}}
// \DeclareTextCommandDefault{\textregistered}{\textcircled{%
//      \check@mathfonts\fontsize\sf@size\z@\math@fontsfalse\selectfont R}}
// \DeclareRobustCommand{\copyright}{%
//    \ifmmode{\nfss@text{\textcopyright}}\else\textcopyright\fi}

defineMacro("\\textcopyright", "\\html@mathml{\\textcircled{c}}{\\char`©}");
defineMacro("\\copyright", "\\TextOrMath{\\textcopyright}{\\text{\\textcopyright}}");
defineMacro("\\textregistered", "\\html@mathml{\\textcircled{\\scriptsize R}}{\\char`®}"); // Characters omitted from Unicode range 1D400–1D7FF

defineMacro("\u212C", "\\mathscr{B}"); // script

defineMacro("\u2130", "\\mathscr{E}");
defineMacro("\u2131", "\\mathscr{F}");
defineMacro("\u210B", "\\mathscr{H}");
defineMacro("\u2110", "\\mathscr{I}");
defineMacro("\u2112", "\\mathscr{L}");
defineMacro("\u2133", "\\mathscr{M}");
defineMacro("\u211B", "\\mathscr{R}");
defineMacro("\u212D", "\\mathfrak{C}"); // Fraktur

defineMacro("\u210C", "\\mathfrak{H}");
defineMacro("\u2128", "\\mathfrak{Z}"); // Define \Bbbk with a macro that works in both HTML and MathML.

defineMacro("\\Bbbk", "\\Bbb{k}"); // Unicode middle dot
// The KaTeX fonts do not contain U+00B7. Instead, \cdotp displays
// the dot at U+22C5 and gives it punct spacing.

defineMacro("\xB7", "\\cdotp"); // \llap and \rlap render their contents in text mode

defineMacro("\\llap", "\\mathllap{\\textrm{#1}}");
defineMacro("\\rlap", "\\mathrlap{\\textrm{#1}}");
defineMacro("\\clap", "\\mathclap{\\textrm{#1}}"); // \mathstrut from the TeXbook, p 360

defineMacro("\\mathstrut", "\\vphantom{(}"); // \underbar from TeXbook p 353

defineMacro("\\underbar", "\\underline{\\text{#1}}"); // \not is defined by base/fontmath.ltx via
// \DeclareMathSymbol{\not}{\mathrel}{symbols}{"36}
// It's thus treated like a \mathrel, but defined by a symbol that has zero
// width but extends to the right.  We use \rlap to get that spacing.
// For MathML we write U+0338 here. buildMathML.js will then do the overlay.

defineMacro("\\not", '\\html@mathml{\\mathrel{\\mathrlap\\@not}}{\\char"338}'); // Negated symbols from base/fontmath.ltx:
// \def\neq{\not=} \let\ne=\neq
// \DeclareRobustCommand
//   \notin{\mathrel{\m@th\mathpalette\c@ncel\in}}
// \def\c@ncel#1#2{\m@th\ooalign{$\hfil#1\mkern1mu/\hfil$\crcr$#1#2$}}

defineMacro("\\neq", "\\html@mathml{\\mathrel{\\not=}}{\\mathrel{\\char`≠}}");
defineMacro("\\ne", "\\neq");
defineMacro("\u2260", "\\neq");
defineMacro("\\notin", "\\html@mathml{\\mathrel{{\\in}\\mathllap{/\\mskip1mu}}}" + "{\\mathrel{\\char`∉}}");
defineMacro("\u2209", "\\notin"); // Unicode stacked relations

defineMacro("\u2258", "\\html@mathml{" + "\\mathrel{=\\kern{-1em}\\raisebox{0.4em}{$\\scriptsize\\frown$}}" + "}{\\mathrel{\\char`\u2258}}");
defineMacro("\u2259", "\\html@mathml{\\stackrel{\\tiny\\wedge}{=}}{\\mathrel{\\char`\u2258}}");
defineMacro("\u225A", "\\html@mathml{\\stackrel{\\tiny\\vee}{=}}{\\mathrel{\\char`\u225A}}");
defineMacro("\u225B", "\\html@mathml{\\stackrel{\\scriptsize\\star}{=}}" + "{\\mathrel{\\char`\u225B}}");
defineMacro("\u225D", "\\html@mathml{\\stackrel{\\tiny\\mathrm{def}}{=}}" + "{\\mathrel{\\char`\u225D}}");
defineMacro("\u225E", "\\html@mathml{\\stackrel{\\tiny\\mathrm{m}}{=}}" + "{\\mathrel{\\char`\u225E}}");
defineMacro("\u225F", "\\html@mathml{\\stackrel{\\tiny?}{=}}{\\mathrel{\\char`\u225F}}"); // Misc Unicode

defineMacro("\u27C2", "\\perp");
defineMacro("\u203C", "\\mathclose{!\\mkern-0.8mu!}");
defineMacro("\u220C", "\\notni");
defineMacro("\u231C", "\\ulcorner");
defineMacro("\u231D", "\\urcorner");
defineMacro("\u231E", "\\llcorner");
defineMacro("\u231F", "\\lrcorner");
defineMacro("\xA9", "\\copyright");
defineMacro("\xAE", "\\textregistered");
defineMacro("\uFE0F", "\\textregistered"); // The KaTeX fonts have corners at codepoints that don't match Unicode.
// For MathML purposes, use the Unicode code point.

defineMacro("\\ulcorner", "\\html@mathml{\\@ulcorner}{\\mathop{\\char\"231c}}");
defineMacro("\\urcorner", "\\html@mathml{\\@urcorner}{\\mathop{\\char\"231d}}");
defineMacro("\\llcorner", "\\html@mathml{\\@llcorner}{\\mathop{\\char\"231e}}");
defineMacro("\\lrcorner", "\\html@mathml{\\@lrcorner}{\\mathop{\\char\"231f}}"); //////////////////////////////////////////////////////////////////////
// LaTeX_2ε
// \vdots{\vbox{\baselineskip4\p@  \lineskiplimit\z@
// \kern6\p@\hbox{.}\hbox{.}\hbox{.}}}
// We'll call \varvdots, which gets a glyph from symbols.js.
// The zero-width rule gets us an equivalent to the vertical 6pt kern.

defineMacro("\\vdots", "\\mathord{\\varvdots\\rule{0pt}{15pt}}");
defineMacro("\u22EE", "\\vdots"); //////////////////////////////////////////////////////////////////////
// amsmath.sty
// http://mirrors.concertpass.com/tex-archive/macros/latex/required/amsmath/amsmath.pdf
// Italic Greek capital letters.  AMS defines these with \DeclareMathSymbol,
// but they are equivalent to \mathit{\Letter}.

defineMacro("\\varGamma", "\\mathit{\\Gamma}");
defineMacro("\\varDelta", "\\mathit{\\Delta}");
defineMacro("\\varTheta", "\\mathit{\\Theta}");
defineMacro("\\varLambda", "\\mathit{\\Lambda}");
defineMacro("\\varXi", "\\mathit{\\Xi}");
defineMacro("\\varPi", "\\mathit{\\Pi}");
defineMacro("\\varSigma", "\\mathit{\\Sigma}");
defineMacro("\\varUpsilon", "\\mathit{\\Upsilon}");
defineMacro("\\varPhi", "\\mathit{\\Phi}");
defineMacro("\\varPsi", "\\mathit{\\Psi}");
defineMacro("\\varOmega", "\\mathit{\\Omega}"); //\newcommand{\substack}[1]{\subarray{c}#1\endsubarray}

defineMacro("\\substack", "\\begin{subarray}{c}#1\\end{subarray}"); // \renewcommand{\colon}{\nobreak\mskip2mu\mathpunct{}\nonscript
// \mkern-\thinmuskip{:}\mskip6muplus1mu\relax}

defineMacro("\\colon", "\\nobreak\\mskip2mu\\mathpunct{}" + "\\mathchoice{\\mkern-3mu}{\\mkern-3mu}{}{}{:}\\mskip6mu"); // \newcommand{\boxed}[1]{\fbox{\m@th$\displaystyle#1$}}

defineMacro("\\boxed", "\\fbox{$\\displaystyle{#1}$}"); // \def\iff{\DOTSB\;\Longleftrightarrow\;}
// \def\implies{\DOTSB\;\Longrightarrow\;}
// \def\impliedby{\DOTSB\;\Longleftarrow\;}

defineMacro("\\iff", "\\DOTSB\\;\\Longleftrightarrow\\;");
defineMacro("\\implies", "\\DOTSB\\;\\Longrightarrow\\;");
defineMacro("\\impliedby", "\\DOTSB\\;\\Longleftarrow\\;"); // AMSMath's automatic \dots, based on \mdots@@ macro.

var dotsByToken = {
  ',': '\\dotsc',
  '\\not': '\\dotsb',
  // \keybin@ checks for the following:
  '+': '\\dotsb',
  '=': '\\dotsb',
  '<': '\\dotsb',
  '>': '\\dotsb',
  '-': '\\dotsb',
  '*': '\\dotsb',
  ':': '\\dotsb',
  // Symbols whose definition starts with \DOTSB:
  '\\DOTSB': '\\dotsb',
  '\\coprod': '\\dotsb',
  '\\bigvee': '\\dotsb',
  '\\bigwedge': '\\dotsb',
  '\\biguplus': '\\dotsb',
  '\\bigcap': '\\dotsb',
  '\\bigcup': '\\dotsb',
  '\\prod': '\\dotsb',
  '\\sum': '\\dotsb',
  '\\bigotimes': '\\dotsb',
  '\\bigoplus': '\\dotsb',
  '\\bigodot': '\\dotsb',
  '\\bigsqcup': '\\dotsb',
  '\\And': '\\dotsb',
  '\\longrightarrow': '\\dotsb',
  '\\Longrightarrow': '\\dotsb',
  '\\longleftarrow': '\\dotsb',
  '\\Longleftarrow': '\\dotsb',
  '\\longleftrightarrow': '\\dotsb',
  '\\Longleftrightarrow': '\\dotsb',
  '\\mapsto': '\\dotsb',
  '\\longmapsto': '\\dotsb',
  '\\hookrightarrow': '\\dotsb',
  '\\doteq': '\\dotsb',
  // Symbols whose definition starts with \mathbin:
  '\\mathbin': '\\dotsb',
  // Symbols whose definition starts with \mathrel:
  '\\mathrel': '\\dotsb',
  '\\relbar': '\\dotsb',
  '\\Relbar': '\\dotsb',
  '\\xrightarrow': '\\dotsb',
  '\\xleftarrow': '\\dotsb',
  // Symbols whose definition starts with \DOTSI:
  '\\DOTSI': '\\dotsi',
  '\\int': '\\dotsi',
  '\\oint': '\\dotsi',
  '\\iint': '\\dotsi',
  '\\iiint': '\\dotsi',
  '\\iiiint': '\\dotsi',
  '\\idotsint': '\\dotsi',
  // Symbols whose definition starts with \DOTSX:
  '\\DOTSX': '\\dotsx'
};
defineMacro("\\dots", function (context) {
  // TODO: If used in text mode, should expand to \textellipsis.
  // However, in KaTeX, \textellipsis and \ldots behave the same
  // (in text mode), and it's unlikely we'd see any of the math commands
  // that affect the behavior of \dots when in text mode.  So fine for now
  // (until we support \ifmmode ... \else ... \fi).
  var thedots = '\\dotso';
  var next = context.expandAfterFuture().text;

  if (next in dotsByToken) {
    thedots = dotsByToken[next];
  } else if (next.substr(0, 4) === '\\not') {
    thedots = '\\dotsb';
  } else if (next in src_symbols.math) {
    if (utils.contains(['bin', 'rel'], src_symbols.math[next].group)) {
      thedots = '\\dotsb';
    }
  }

  return thedots;
});
var spaceAfterDots = {
  // \rightdelim@ checks for the following:
  ')': true,
  ']': true,
  '\\rbrack': true,
  '\\}': true,
  '\\rbrace': true,
  '\\rangle': true,
  '\\rceil': true,
  '\\rfloor': true,
  '\\rgroup': true,
  '\\rmoustache': true,
  '\\right': true,
  '\\bigr': true,
  '\\biggr': true,
  '\\Bigr': true,
  '\\Biggr': true,
  // \extra@ also tests for the following:
  '$': true,
  // \extrap@ checks for the following:
  ';': true,
  '.': true,
  ',': true
};
defineMacro("\\dotso", function (context) {
  var next = context.future().text;

  if (next in spaceAfterDots) {
    return "\\ldots\\,";
  } else {
    return "\\ldots";
  }
});
defineMacro("\\dotsc", function (context) {
  var next = context.future().text; // \dotsc uses \extra@ but not \extrap@, instead specially checking for
  // ';' and '.', but doesn't check for ','.

  if (next in spaceAfterDots && next !== ',') {
    return "\\ldots\\,";
  } else {
    return "\\ldots";
  }
});
defineMacro("\\cdots", function (context) {
  var next = context.future().text;

  if (next in spaceAfterDots) {
    return "\\@cdots\\,";
  } else {
    return "\\@cdots";
  }
});
defineMacro("\\dotsb", "\\cdots");
defineMacro("\\dotsm", "\\cdots");
defineMacro("\\dotsi", "\\!\\cdots"); // amsmath doesn't actually define \dotsx, but \dots followed by a macro
// starting with \DOTSX implies \dotso, and then \extra@ detects this case
// and forces the added `\,`.

defineMacro("\\dotsx", "\\ldots\\,"); // \let\DOTSI\relax
// \let\DOTSB\relax
// \let\DOTSX\relax

defineMacro("\\DOTSI", "\\relax");
defineMacro("\\DOTSB", "\\relax");
defineMacro("\\DOTSX", "\\relax"); // Spacing, based on amsmath.sty's override of LaTeX defaults
// \DeclareRobustCommand{\tmspace}[3]{%
//   \ifmmode\mskip#1#2\else\kern#1#3\fi\relax}

defineMacro("\\tmspace", "\\TextOrMath{\\kern#1#3}{\\mskip#1#2}\\relax"); // \renewcommand{\,}{\tmspace+\thinmuskip{.1667em}}
// TODO: math mode should use \thinmuskip

defineMacro("\\,", "\\tmspace+{3mu}{.1667em}"); // \let\thinspace\,

defineMacro("\\thinspace", "\\,"); // \def\>{\mskip\medmuskip}
// \renewcommand{\:}{\tmspace+\medmuskip{.2222em}}
// TODO: \> and math mode of \: should use \medmuskip = 4mu plus 2mu minus 4mu

defineMacro("\\>", "\\mskip{4mu}");
defineMacro("\\:", "\\tmspace+{4mu}{.2222em}"); // \let\medspace\:

defineMacro("\\medspace", "\\:"); // \renewcommand{\;}{\tmspace+\thickmuskip{.2777em}}
// TODO: math mode should use \thickmuskip = 5mu plus 5mu

defineMacro("\\;", "\\tmspace+{5mu}{.2777em}"); // \let\thickspace\;

defineMacro("\\thickspace", "\\;"); // \renewcommand{\!}{\tmspace-\thinmuskip{.1667em}}
// TODO: math mode should use \thinmuskip

defineMacro("\\!", "\\tmspace-{3mu}{.1667em}"); // \let\negthinspace\!

defineMacro("\\negthinspace", "\\!"); // \newcommand{\negmedspace}{\tmspace-\medmuskip{.2222em}}
// TODO: math mode should use \medmuskip

defineMacro("\\negmedspace", "\\tmspace-{4mu}{.2222em}"); // \newcommand{\negthickspace}{\tmspace-\thickmuskip{.2777em}}
// TODO: math mode should use \thickmuskip

defineMacro("\\negthickspace", "\\tmspace-{5mu}{.277em}"); // \def\enspace{\kern.5em }

defineMacro("\\enspace", "\\kern.5em "); // \def\enskip{\hskip.5em\relax}

defineMacro("\\enskip", "\\hskip.5em\\relax"); // \def\quad{\hskip1em\relax}

defineMacro("\\quad", "\\hskip1em\\relax"); // \def\qquad{\hskip2em\relax}

defineMacro("\\qquad", "\\hskip2em\\relax"); // \tag@in@display form of \tag

defineMacro("\\tag", "\\@ifstar\\tag@literal\\tag@paren");
defineMacro("\\tag@paren", "\\tag@literal{({#1})}");
defineMacro("\\tag@literal", function (context) {
  if (context.macros.get("\\df@tag")) {
    throw new src_ParseError("Multiple \\tag");
  }

  return "\\gdef\\df@tag{\\text{#1}}";
}); // \renewcommand{\bmod}{\nonscript\mskip-\medmuskip\mkern5mu\mathbin
//   {\operator@font mod}\penalty900
//   \mkern5mu\nonscript\mskip-\medmuskip}
// \newcommand{\pod}[1]{\allowbreak
//   \if@display\mkern18mu\else\mkern8mu\fi(#1)}
// \renewcommand{\pmod}[1]{\pod{{\operator@font mod}\mkern6mu#1}}
// \newcommand{\mod}[1]{\allowbreak\if@display\mkern18mu
//   \else\mkern12mu\fi{\operator@font mod}\,\,#1}
// TODO: math mode should use \medmuskip = 4mu plus 2mu minus 4mu

defineMacro("\\bmod", "\\mathchoice{\\mskip1mu}{\\mskip1mu}{\\mskip5mu}{\\mskip5mu}" + "\\mathbin{\\rm mod}" + "\\mathchoice{\\mskip1mu}{\\mskip1mu}{\\mskip5mu}{\\mskip5mu}");
defineMacro("\\pod", "\\allowbreak" + "\\mathchoice{\\mkern18mu}{\\mkern8mu}{\\mkern8mu}{\\mkern8mu}(#1)");
defineMacro("\\pmod", "\\pod{{\\rm mod}\\mkern6mu#1}");
defineMacro("\\mod", "\\allowbreak" + "\\mathchoice{\\mkern18mu}{\\mkern12mu}{\\mkern12mu}{\\mkern12mu}" + "{\\rm mod}\\,\\,#1"); // \pmb    --   A simulation of bold.
// The version in ambsy.sty works by typesetting three copies of the argument
// with small offsets. We use two copies. We omit the vertical offset because
// of rendering problems that makeVList encounters in Safari.

defineMacro("\\pmb", "\\html@mathml{" + "\\@binrel{#1}{\\mathrlap{#1}\\kern0.5px#1}}" + "{\\mathbf{#1}}"); //////////////////////////////////////////////////////////////////////
// LaTeX source2e
// \expandafter\let\expandafter\@normalcr
//     \csname\expandafter\@gobble\string\\ \endcsname
// \DeclareRobustCommand\newline{\@normalcr\relax}

defineMacro("\\newline", "\\\\\\relax"); // \def\TeX{T\kern-.1667em\lower.5ex\hbox{E}\kern-.125emX\@}
// TODO: Doesn't normally work in math mode because \@ fails.  KaTeX doesn't
// support \@ yet, so that's omitted, and we add \text so that the result
// doesn't look funny in math mode.

defineMacro("\\TeX", "\\textrm{\\html@mathml{" + "T\\kern-.1667em\\raisebox{-.5ex}{E}\\kern-.125emX" + "}{TeX}}"); // \DeclareRobustCommand{\LaTeX}{L\kern-.36em%
//         {\sbox\z@ T%
//          \vbox to\ht\z@{\hbox{\check@mathfonts
//                               \fontsize\sf@size\z@
//                               \math@fontsfalse\selectfont
//                               A}%
//                         \vss}%
//         }%
//         \kern-.15em%
//         \TeX}
// This code aligns the top of the A with the T (from the perspective of TeX's
// boxes, though visually the A appears to extend above slightly).
// We compute the corresponding \raisebox when A is rendered in \normalsize
// \scriptstyle, which has a scale factor of 0.7 (see Options.js).

var latexRaiseA = makeEm(fontMetricsData["Main-Regular"]["T".charCodeAt(0)][1] - 0.7 * fontMetricsData["Main-Regular"]["A".charCodeAt(0)][1]);
defineMacro("\\LaTeX", "\\textrm{\\html@mathml{" + ("L\\kern-.36em\\raisebox{" + latexRaiseA + "}{\\scriptstyle A}") + "\\kern-.15em\\TeX}{LaTeX}}"); // New KaTeX logo based on tweaking LaTeX logo

defineMacro("\\KaTeX", "\\textrm{\\html@mathml{" + ("K\\kern-.17em\\raisebox{" + latexRaiseA + "}{\\scriptstyle A}") + "\\kern-.15em\\TeX}{KaTeX}}"); // \DeclareRobustCommand\hspace{\@ifstar\@hspacer\@hspace}
// \def\@hspace#1{\hskip  #1\relax}
// \def\@hspacer#1{\vrule \@width\z@\nobreak
//                 \hskip #1\hskip \z@skip}

defineMacro("\\hspace", "\\@ifstar\\@hspacer\\@hspace");
defineMacro("\\@hspace", "\\hskip #1\\relax");
defineMacro("\\@hspacer", "\\rule{0pt}{0pt}\\hskip #1\\relax"); //////////////////////////////////////////////////////////////////////
// mathtools.sty
//\providecommand\ordinarycolon{:}

defineMacro("\\ordinarycolon", ":"); //\def\vcentcolon{\mathrel{\mathop\ordinarycolon}}
//TODO(edemaine): Not yet centered. Fix via \raisebox or #726

defineMacro("\\vcentcolon", "\\mathrel{\\mathop\\ordinarycolon}"); // \providecommand*\dblcolon{\vcentcolon\mathrel{\mkern-.9mu}\vcentcolon}

defineMacro("\\dblcolon", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-.9mu}\\vcentcolon}}" + "{\\mathop{\\char\"2237}}"); // \providecommand*\coloneqq{\vcentcolon\mathrel{\mkern-1.2mu}=}

defineMacro("\\coloneqq", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}=}}" + "{\\mathop{\\char\"2254}}"); // ≔
// \providecommand*\Coloneqq{\dblcolon\mathrel{\mkern-1.2mu}=}

defineMacro("\\Coloneqq", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}=}}" + "{\\mathop{\\char\"2237\\char\"3d}}"); // \providecommand*\coloneq{\vcentcolon\mathrel{\mkern-1.2mu}\mathrel{-}}

defineMacro("\\coloneq", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}\\mathrel{-}}}" + "{\\mathop{\\char\"3a\\char\"2212}}"); // \providecommand*\Coloneq{\dblcolon\mathrel{\mkern-1.2mu}\mathrel{-}}

defineMacro("\\Coloneq", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}\\mathrel{-}}}" + "{\\mathop{\\char\"2237\\char\"2212}}"); // \providecommand*\eqqcolon{=\mathrel{\mkern-1.2mu}\vcentcolon}

defineMacro("\\eqqcolon", "\\html@mathml{" + "\\mathrel{=\\mathrel{\\mkern-1.2mu}\\vcentcolon}}" + "{\\mathop{\\char\"2255}}"); // ≕
// \providecommand*\Eqqcolon{=\mathrel{\mkern-1.2mu}\dblcolon}

defineMacro("\\Eqqcolon", "\\html@mathml{" + "\\mathrel{=\\mathrel{\\mkern-1.2mu}\\dblcolon}}" + "{\\mathop{\\char\"3d\\char\"2237}}"); // \providecommand*\eqcolon{\mathrel{-}\mathrel{\mkern-1.2mu}\vcentcolon}

defineMacro("\\eqcolon", "\\html@mathml{" + "\\mathrel{\\mathrel{-}\\mathrel{\\mkern-1.2mu}\\vcentcolon}}" + "{\\mathop{\\char\"2239}}"); // \providecommand*\Eqcolon{\mathrel{-}\mathrel{\mkern-1.2mu}\dblcolon}

defineMacro("\\Eqcolon", "\\html@mathml{" + "\\mathrel{\\mathrel{-}\\mathrel{\\mkern-1.2mu}\\dblcolon}}" + "{\\mathop{\\char\"2212\\char\"2237}}"); // \providecommand*\colonapprox{\vcentcolon\mathrel{\mkern-1.2mu}\approx}

defineMacro("\\colonapprox", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}\\approx}}" + "{\\mathop{\\char\"3a\\char\"2248}}"); // \providecommand*\Colonapprox{\dblcolon\mathrel{\mkern-1.2mu}\approx}

defineMacro("\\Colonapprox", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}\\approx}}" + "{\\mathop{\\char\"2237\\char\"2248}}"); // \providecommand*\colonsim{\vcentcolon\mathrel{\mkern-1.2mu}\sim}

defineMacro("\\colonsim", "\\html@mathml{" + "\\mathrel{\\vcentcolon\\mathrel{\\mkern-1.2mu}\\sim}}" + "{\\mathop{\\char\"3a\\char\"223c}}"); // \providecommand*\Colonsim{\dblcolon\mathrel{\mkern-1.2mu}\sim}

defineMacro("\\Colonsim", "\\html@mathml{" + "\\mathrel{\\dblcolon\\mathrel{\\mkern-1.2mu}\\sim}}" + "{\\mathop{\\char\"2237\\char\"223c}}"); // Some Unicode characters are implemented with macros to mathtools functions.

defineMacro("\u2237", "\\dblcolon"); // ::

defineMacro("\u2239", "\\eqcolon"); // -:

defineMacro("\u2254", "\\coloneqq"); // :=

defineMacro("\u2255", "\\eqqcolon"); // =:

defineMacro("\u2A74", "\\Coloneqq"); // ::=
//////////////////////////////////////////////////////////////////////
// colonequals.sty
// Alternate names for mathtools's macros:

defineMacro("\\ratio", "\\vcentcolon");
defineMacro("\\coloncolon", "\\dblcolon");
defineMacro("\\colonequals", "\\coloneqq");
defineMacro("\\coloncolonequals", "\\Coloneqq");
defineMacro("\\equalscolon", "\\eqqcolon");
defineMacro("\\equalscoloncolon", "\\Eqqcolon");
defineMacro("\\colonminus", "\\coloneq");
defineMacro("\\coloncolonminus", "\\Coloneq");
defineMacro("\\minuscolon", "\\eqcolon");
defineMacro("\\minuscoloncolon", "\\Eqcolon"); // \colonapprox name is same in mathtools and colonequals.

defineMacro("\\coloncolonapprox", "\\Colonapprox"); // \colonsim name is same in mathtools and colonequals.

defineMacro("\\coloncolonsim", "\\Colonsim"); // Additional macros, implemented by analogy with mathtools definitions:

defineMacro("\\simcolon", "\\mathrel{\\sim\\mathrel{\\mkern-1.2mu}\\vcentcolon}");
defineMacro("\\simcoloncolon", "\\mathrel{\\sim\\mathrel{\\mkern-1.2mu}\\dblcolon}");
defineMacro("\\approxcolon", "\\mathrel{\\approx\\mathrel{\\mkern-1.2mu}\\vcentcolon}");
defineMacro("\\approxcoloncolon", "\\mathrel{\\approx\\mathrel{\\mkern-1.2mu}\\dblcolon}"); // Present in newtxmath, pxfonts and txfonts

defineMacro("\\notni", "\\html@mathml{\\not\\ni}{\\mathrel{\\char`\u220C}}");
defineMacro("\\limsup", "\\DOTSB\\operatorname*{lim\\,sup}");
defineMacro("\\liminf", "\\DOTSB\\operatorname*{lim\\,inf}"); //////////////////////////////////////////////////////////////////////
// From amsopn.sty

defineMacro("\\injlim", "\\DOTSB\\operatorname*{inj\\,lim}");
defineMacro("\\projlim", "\\DOTSB\\operatorname*{proj\\,lim}");
defineMacro("\\varlimsup", "\\DOTSB\\operatorname*{\\overline{lim}}");
defineMacro("\\varliminf", "\\DOTSB\\operatorname*{\\underline{lim}}");
defineMacro("\\varinjlim", "\\DOTSB\\operatorname*{\\underrightarrow{lim}}");
defineMacro("\\varprojlim", "\\DOTSB\\operatorname*{\\underleftarrow{lim}}"); //////////////////////////////////////////////////////////////////////
// MathML alternates for KaTeX glyphs in the Unicode private area

defineMacro("\\gvertneqq", "\\html@mathml{\\@gvertneqq}{\u2269}");
defineMacro("\\lvertneqq", "\\html@mathml{\\@lvertneqq}{\u2268}");
defineMacro("\\ngeqq", "\\html@mathml{\\@ngeqq}{\u2271}");
defineMacro("\\ngeqslant", "\\html@mathml{\\@ngeqslant}{\u2271}");
defineMacro("\\nleqq", "\\html@mathml{\\@nleqq}{\u2270}");
defineMacro("\\nleqslant", "\\html@mathml{\\@nleqslant}{\u2270}");
defineMacro("\\nshortmid", "\\html@mathml{\\@nshortmid}{∤}");
defineMacro("\\nshortparallel", "\\html@mathml{\\@nshortparallel}{∦}");
defineMacro("\\nsubseteqq", "\\html@mathml{\\@nsubseteqq}{\u2288}");
defineMacro("\\nsupseteqq", "\\html@mathml{\\@nsupseteqq}{\u2289}");
defineMacro("\\varsubsetneq", "\\html@mathml{\\@varsubsetneq}{⊊}");
defineMacro("\\varsubsetneqq", "\\html@mathml{\\@varsubsetneqq}{⫋}");
defineMacro("\\varsupsetneq", "\\html@mathml{\\@varsupsetneq}{⊋}");
defineMacro("\\varsupsetneqq", "\\html@mathml{\\@varsupsetneqq}{⫌}");
defineMacro("\\imath", "\\html@mathml{\\@imath}{\u0131}");
defineMacro("\\jmath", "\\html@mathml{\\@jmath}{\u0237}"); //////////////////////////////////////////////////////////////////////
// stmaryrd and semantic
// The stmaryrd and semantic packages render the next four items by calling a
// glyph. Those glyphs do not exist in the KaTeX fonts. Hence the macros.

defineMacro("\\llbracket", "\\html@mathml{" + "\\mathopen{[\\mkern-3.2mu[}}" + "{\\mathopen{\\char`\u27E6}}");
defineMacro("\\rrbracket", "\\html@mathml{" + "\\mathclose{]\\mkern-3.2mu]}}" + "{\\mathclose{\\char`\u27E7}}");
defineMacro("\u27E6", "\\llbracket"); // blackboard bold [

defineMacro("\u27E7", "\\rrbracket"); // blackboard bold ]

defineMacro("\\lBrace", "\\html@mathml{" + "\\mathopen{\\{\\mkern-3.2mu[}}" + "{\\mathopen{\\char`\u2983}}");
defineMacro("\\rBrace", "\\html@mathml{" + "\\mathclose{]\\mkern-3.2mu\\}}}" + "{\\mathclose{\\char`\u2984}}");
defineMacro("\u2983", "\\lBrace"); // blackboard bold {

defineMacro("\u2984", "\\rBrace"); // blackboard bold }
// TODO: Create variable sized versions of the last two items. I believe that
// will require new font glyphs.
// The stmaryrd function `\minuso` provides a "Plimsoll" symbol that
// superimposes the characters \circ and \mathminus. Used in chemistry.

defineMacro("\\minuso", "\\mathbin{\\html@mathml{" + "{\\mathrlap{\\mathchoice{\\kern{0.145em}}{\\kern{0.145em}}" + "{\\kern{0.1015em}}{\\kern{0.0725em}}\\circ}{-}}}" + "{\\char`⦵}}");
defineMacro("⦵", "\\minuso"); //////////////////////////////////////////////////////////////////////
// texvc.sty
// The texvc package contains macros available in mediawiki pages.
// We omit the functions deprecated at
// https://en.wikipedia.org/wiki/Help:Displaying_a_formula#Deprecated_syntax
// We also omit texvc's \O, which conflicts with \text{\O}

defineMacro("\\darr", "\\downarrow");
defineMacro("\\dArr", "\\Downarrow");
defineMacro("\\Darr", "\\Downarrow");
defineMacro("\\lang", "\\langle");
defineMacro("\\rang", "\\rangle");
defineMacro("\\uarr", "\\uparrow");
defineMacro("\\uArr", "\\Uparrow");
defineMacro("\\Uarr", "\\Uparrow");
defineMacro("\\N", "\\mathbb{N}");
defineMacro("\\R", "\\mathbb{R}");
defineMacro("\\Z", "\\mathbb{Z}");
defineMacro("\\alef", "\\aleph");
defineMacro("\\alefsym", "\\aleph");
defineMacro("\\Alpha", "\\mathrm{A}");
defineMacro("\\Beta", "\\mathrm{B}");
defineMacro("\\bull", "\\bullet");
defineMacro("\\Chi", "\\mathrm{X}");
defineMacro("\\clubs", "\\clubsuit");
defineMacro("\\cnums", "\\mathbb{C}");
defineMacro("\\Complex", "\\mathbb{C}");
defineMacro("\\Dagger", "\\ddagger");
defineMacro("\\diamonds", "\\diamondsuit");
defineMacro("\\empty", "\\emptyset");
defineMacro("\\Epsilon", "\\mathrm{E}");
defineMacro("\\Eta", "\\mathrm{H}");
defineMacro("\\exist", "\\exists");
defineMacro("\\harr", "\\leftrightarrow");
defineMacro("\\hArr", "\\Leftrightarrow");
defineMacro("\\Harr", "\\Leftrightarrow");
defineMacro("\\hearts", "\\heartsuit");
defineMacro("\\image", "\\Im");
defineMacro("\\infin", "\\infty");
defineMacro("\\Iota", "\\mathrm{I}");
defineMacro("\\isin", "\\in");
defineMacro("\\Kappa", "\\mathrm{K}");
defineMacro("\\larr", "\\leftarrow");
defineMacro("\\lArr", "\\Leftarrow");
defineMacro("\\Larr", "\\Leftarrow");
defineMacro("\\lrarr", "\\leftrightarrow");
defineMacro("\\lrArr", "\\Leftrightarrow");
defineMacro("\\Lrarr", "\\Leftrightarrow");
defineMacro("\\Mu", "\\mathrm{M}");
defineMacro("\\natnums", "\\mathbb{N}");
defineMacro("\\Nu", "\\mathrm{N}");
defineMacro("\\Omicron", "\\mathrm{O}");
defineMacro("\\plusmn", "\\pm");
defineMacro("\\rarr", "\\rightarrow");
defineMacro("\\rArr", "\\Rightarrow");
defineMacro("\\Rarr", "\\Rightarrow");
defineMacro("\\real", "\\Re");
defineMacro("\\reals", "\\mathbb{R}");
defineMacro("\\Reals", "\\mathbb{R}");
defineMacro("\\Rho", "\\mathrm{P}");
defineMacro("\\sdot", "\\cdot");
defineMacro("\\sect", "\\S");
defineMacro("\\spades", "\\spadesuit");
defineMacro("\\sub", "\\subset");
defineMacro("\\sube", "\\subseteq");
defineMacro("\\supe", "\\supseteq");
defineMacro("\\Tau", "\\mathrm{T}");
defineMacro("\\thetasym", "\\vartheta"); // TODO: defineMacro("\\varcoppa", "\\\mbox{\\coppa}");

defineMacro("\\weierp", "\\wp");
defineMacro("\\Zeta", "\\mathrm{Z}"); //////////////////////////////////////////////////////////////////////
// statmath.sty
// https://ctan.math.illinois.edu/macros/latex/contrib/statmath/statmath.pdf

defineMacro("\\argmin", "\\DOTSB\\operatorname*{arg\\,min}");
defineMacro("\\argmax", "\\DOTSB\\operatorname*{arg\\,max}");
defineMacro("\\plim", "\\DOTSB\\mathop{\\operatorname{plim}}\\limits"); //////////////////////////////////////////////////////////////////////
// braket.sty
// http://ctan.math.washington.edu/tex-archive/macros/latex/contrib/braket/braket.pdf

defineMacro("\\bra", "\\mathinner{\\langle{#1}|}");
defineMacro("\\ket", "\\mathinner{|{#1}\\rangle}");
defineMacro("\\braket", "\\mathinner{\\langle{#1}\\rangle}");
defineMacro("\\Bra", "\\left\\langle#1\\right|");
defineMacro("\\Ket", "\\left|#1\\right\\rangle"); //////////////////////////////////////////////////////////////////////
// actuarialangle.dtx

defineMacro("\\angln", "{\\angl n}"); // Custom Khan Academy colors, should be moved to an optional package

defineMacro("\\blue", "\\textcolor{##6495ed}{#1}");
defineMacro("\\orange", "\\textcolor{##ffa500}{#1}");
defineMacro("\\pink", "\\textcolor{##ff00af}{#1}");
defineMacro("\\red", "\\textcolor{##df0030}{#1}");
defineMacro("\\green", "\\textcolor{##28ae7b}{#1}");
defineMacro("\\gray", "\\textcolor{gray}{#1}");
defineMacro("\\purple", "\\textcolor{##9d38bd}{#1}");
defineMacro("\\blueA", "\\textcolor{##ccfaff}{#1}");
defineMacro("\\blueB", "\\textcolor{##80f6ff}{#1}");
defineMacro("\\blueC", "\\textcolor{##63d9ea}{#1}");
defineMacro("\\blueD", "\\textcolor{##11accd}{#1}");
defineMacro("\\blueE", "\\textcolor{##0c7f99}{#1}");
defineMacro("\\tealA", "\\textcolor{##94fff5}{#1}");
defineMacro("\\tealB", "\\textcolor{##26edd5}{#1}");
defineMacro("\\tealC", "\\textcolor{##01d1c1}{#1}");
defineMacro("\\tealD", "\\textcolor{##01a995}{#1}");
defineMacro("\\tealE", "\\textcolor{##208170}{#1}");
defineMacro("\\greenA", "\\textcolor{##b6ffb0}{#1}");
defineMacro("\\greenB", "\\textcolor{##8af281}{#1}");
defineMacro("\\greenC", "\\textcolor{##74cf70}{#1}");
defineMacro("\\greenD", "\\textcolor{##1fab54}{#1}");
defineMacro("\\greenE", "\\textcolor{##0d923f}{#1}");
defineMacro("\\goldA", "\\textcolor{##ffd0a9}{#1}");
defineMacro("\\goldB", "\\textcolor{##ffbb71}{#1}");
defineMacro("\\goldC", "\\textcolor{##ff9c39}{#1}");
defineMacro("\\goldD", "\\textcolor{##e07d10}{#1}");
defineMacro("\\goldE", "\\textcolor{##a75a05}{#1}");
defineMacro("\\redA", "\\textcolor{##fca9a9}{#1}");
defineMacro("\\redB", "\\textcolor{##ff8482}{#1}");
defineMacro("\\redC", "\\textcolor{##f9685d}{#1}");
defineMacro("\\redD", "\\textcolor{##e84d39}{#1}");
defineMacro("\\redE", "\\textcolor{##bc2612}{#1}");
defineMacro("\\maroonA", "\\textcolor{##ffbde0}{#1}");
defineMacro("\\maroonB", "\\textcolor{##ff92c6}{#1}");
defineMacro("\\maroonC", "\\textcolor{##ed5fa6}{#1}");
defineMacro("\\maroonD", "\\textcolor{##ca337c}{#1}");
defineMacro("\\maroonE", "\\textcolor{##9e034e}{#1}");
defineMacro("\\purpleA", "\\textcolor{##ddd7ff}{#1}");
defineMacro("\\purpleB", "\\textcolor{##c6b9fc}{#1}");
defineMacro("\\purpleC", "\\textcolor{##aa87ff}{#1}");
defineMacro("\\purpleD", "\\textcolor{##7854ab}{#1}");
defineMacro("\\purpleE", "\\textcolor{##543b78}{#1}");
defineMacro("\\mintA", "\\textcolor{##f5f9e8}{#1}");
defineMacro("\\mintB", "\\textcolor{##edf2df}{#1}");
defineMacro("\\mintC", "\\textcolor{##e0e5cc}{#1}");
defineMacro("\\grayA", "\\textcolor{##f6f7f7}{#1}");
defineMacro("\\grayB", "\\textcolor{##f0f1f2}{#1}");
defineMacro("\\grayC", "\\textcolor{##e3e5e6}{#1}");
defineMacro("\\grayD", "\\textcolor{##d6d8da}{#1}");
defineMacro("\\grayE", "\\textcolor{##babec2}{#1}");
defineMacro("\\grayF", "\\textcolor{##888d93}{#1}");
defineMacro("\\grayG", "\\textcolor{##626569}{#1}");
defineMacro("\\grayH", "\\textcolor{##3b3e40}{#1}");
defineMacro("\\grayI", "\\textcolor{##21242c}{#1}");
defineMacro("\\kaBlue", "\\textcolor{##314453}{#1}");
defineMacro("\\kaGreen", "\\textcolor{##71B307}{#1}");
/**
 * This file contains the “gullet” where macros are expanded
 * until only non-macro tokens remain.
 */







// List of commands that act like macros but aren't defined as a macro,
// function, or symbol.  Used in `isDefined`.
var implicitCommands = {
  "\\relax": true,
  // MacroExpander.js
  "^": true,
  // Parser.js
  "_": true,
  // Parser.js
  "\\limits": true,
  // Parser.js
  "\\nolimits": true // Parser.js

};

var MacroExpander = /*#__PURE__*/function () {
  function MacroExpander(input, settings, mode) {
    this.settings = void 0;
    this.expansionCount = void 0;
    this.lexer = void 0;
    this.macros = void 0;
    this.stack = void 0;
    this.mode = void 0;
    this.settings = settings;
    this.expansionCount = 0;
    this.feed(input); // Make new global namespace

    this.macros = new Namespace(src_macros, settings.macros);
    this.mode = mode;
    this.stack = []; // contains tokens in REVERSE order
  }
  /**
   * Feed a new input string to the same MacroExpander
   * (with existing macros etc.).
   */


  var _proto = MacroExpander.prototype;

  _proto.feed = function feed(input) {
    this.lexer = new Lexer(input, this.settings);
  }
  /**
   * Switches between "text" and "math" modes.
   */
  ;

  _proto.switchMode = function switchMode(newMode) {
    this.mode = newMode;
  }
  /**
   * Start a new group nesting within all namespaces.
   */
  ;

  _proto.beginGroup = function beginGroup() {
    this.macros.beginGroup();
  }
  /**
   * End current group nesting within all namespaces.
   */
  ;

  _proto.endGroup = function endGroup() {
    this.macros.endGroup();
  }
  /**
   * Ends all currently nested groups (if any), restoring values before the
   * groups began.  Useful in case of an error in the middle of parsing.
   */
  ;

  _proto.endGroups = function endGroups() {
    this.macros.endGroups();
  }
  /**
   * Returns the topmost token on the stack, without expanding it.
   * Similar in behavior to TeX's `\futurelet`.
   */
  ;

  _proto.future = function future() {
    if (this.stack.length === 0) {
      this.pushToken(this.lexer.lex());
    }

    return this.stack[this.stack.length - 1];
  }
  /**
   * Remove and return the next unexpanded token.
   */
  ;

  _proto.popToken = function popToken() {
    this.future(); // ensure non-empty stack

    return this.stack.pop();
  }
  /**
   * Add a given token to the token stack.  In particular, this get be used
   * to put back a token returned from one of the other methods.
   */
  ;

  _proto.pushToken = function pushToken(token) {
    this.stack.push(token);
  }
  /**
   * Append an array of tokens to the token stack.
   */
  ;

  _proto.pushTokens = function pushTokens(tokens) {
    var _this$stack;

    (_this$stack = this.stack).push.apply(_this$stack, tokens);
  }
  /**
   * Find an macro argument without expanding tokens and append the array of
   * tokens to the token stack. Uses Token as a container for the result.
   */
  ;

  _proto.scanArgument = function scanArgument(isOptional) {
    var start;
    var end;
    var tokens;

    if (isOptional) {
      this.consumeSpaces(); // \@ifnextchar gobbles any space following it

      if (this.future().text !== "[") {
        return null;
      }

      start = this.popToken(); // don't include [ in tokens

      var _this$consumeArg = this.consumeArg(["]"]);

      tokens = _this$consumeArg.tokens;
      end = _this$consumeArg.end;
    } else {
      var _this$consumeArg2 = this.consumeArg();

      tokens = _this$consumeArg2.tokens;
      start = _this$consumeArg2.start;
      end = _this$consumeArg2.end;
    } // indicate the end of an argument


    this.pushToken(new Token("EOF", end.loc));
    this.pushTokens(tokens);
    return start.range(end, "");
  }
  /**
   * Consume all following space tokens, without expansion.
   */
  ;

  _proto.consumeSpaces = function consumeSpaces() {
    for (;;) {
      var token = this.future();

      if (token.text === " ") {
        this.stack.pop();
      } else {
        break;
      }
    }
  }
  /**
   * Consume an argument from the token stream, and return the resulting array
   * of tokens and start/end token.
   */
  ;

  _proto.consumeArg = function consumeArg(delims) {
    // The argument for a delimited parameter is the shortest (possibly
    // empty) sequence of tokens with properly nested {...} groups that is
    // followed ... by this particular list of non-parameter tokens.
    // The argument for an undelimited parameter is the next nonblank
    // token, unless that token is ‘{’, when the argument will be the
    // entire {...} group that follows.
    var tokens = [];
    var isDelimited = delims && delims.length > 0;

    if (!isDelimited) {
      // Ignore spaces between arguments.  As the TeXbook says:
      // "After you have said ‘\def\row#1#2{...}’, you are allowed to
      //  put spaces between the arguments (e.g., ‘\row x n’), because
      //  TeX doesn’t use single spaces as undelimited arguments."
      this.consumeSpaces();
    }

    var start = this.future();
    var tok;
    var depth = 0;
    var match = 0;

    do {
      tok = this.popToken();
      tokens.push(tok);

      if (tok.text === "{") {
        ++depth;
      } else if (tok.text === "}") {
        --depth;

        if (depth === -1) {
          throw new src_ParseError("Extra }", tok);
        }
      } else if (tok.text === "EOF") {
        throw new src_ParseError("Unexpected end of input in a macro argument" + ", expected '" + (delims && isDelimited ? delims[match] : "}") + "'", tok);
      }

      if (delims && isDelimited) {
        if ((depth === 0 || depth === 1 && delims[match] === "{") && tok.text === delims[match]) {
          ++match;

          if (match === delims.length) {
            // don't include delims in tokens
            tokens.splice(-match, match);
            break;
          }
        } else {
          match = 0;
        }
      }
    } while (depth !== 0 || isDelimited); // If the argument found ... has the form ‘{<nested tokens>}’,
    // ... the outermost braces enclosing the argument are removed


    if (start.text === "{" && tokens[tokens.length - 1].text === "}") {
      tokens.pop();
      tokens.shift();
    }

    tokens.reverse(); // to fit in with stack order

    return {
      tokens: tokens,
      start: start,
      end: tok
    };
  }
  /**
   * Consume the specified number of (delimited) arguments from the token
   * stream and return the resulting array of arguments.
   */
  ;

  _proto.consumeArgs = function consumeArgs(numArgs, delimiters) {
    if (delimiters) {
      if (delimiters.length !== numArgs + 1) {
        throw new src_ParseError("The length of delimiters doesn't match the number of args!");
      }

      var delims = delimiters[0];

      for (var i = 0; i < delims.length; i++) {
        var tok = this.popToken();

        if (delims[i] !== tok.text) {
          throw new src_ParseError("Use of the macro doesn't match its definition", tok);
        }
      }
    }

    var args = [];

    for (var _i = 0; _i < numArgs; _i++) {
      args.push(this.consumeArg(delimiters && delimiters[_i + 1]).tokens);
    }

    return args;
  }
  /**
   * Expand the next token only once if possible.
   *
   * If the token is expanded, the resulting tokens will be pushed onto
   * the stack in reverse order and will be returned as an array,
   * also in reverse order.
   *
   * If not, the next token will be returned without removing it
   * from the stack.  This case can be detected by a `Token` return value
   * instead of an `Array` return value.
   *
   * In either case, the next token will be on the top of the stack,
   * or the stack will be empty.
   *
   * Used to implement `expandAfterFuture` and `expandNextToken`.
   *
   * If expandableOnly, only expandable tokens are expanded and
   * an undefined control sequence results in an error.
   */
  ;

  _proto.expandOnce = function expandOnce(expandableOnly) {
    var topToken = this.popToken();
    var name = topToken.text;
    var expansion = !topToken.noexpand ? this._getExpansion(name) : null;

    if (expansion == null || expandableOnly && expansion.unexpandable) {
      if (expandableOnly && expansion == null && name[0] === "\\" && !this.isDefined(name)) {
        throw new src_ParseError("Undefined control sequence: " + name);
      }

      this.pushToken(topToken);
      return topToken;
    }

    this.expansionCount++;

    if (this.expansionCount > this.settings.maxExpand) {
      throw new src_ParseError("Too many expansions: infinite loop or " + "need to increase maxExpand setting");
    }

    var tokens = expansion.tokens;
    var args = this.consumeArgs(expansion.numArgs, expansion.delimiters);

    if (expansion.numArgs) {
      // paste arguments in place of the placeholders
      tokens = tokens.slice(); // make a shallow copy

      for (var i = tokens.length - 1; i >= 0; --i) {
        var tok = tokens[i];

        if (tok.text === "#") {
          if (i === 0) {
            throw new src_ParseError("Incomplete placeholder at end of macro body", tok);
          }

          tok = tokens[--i]; // next token on stack

          if (tok.text === "#") {
            // ## → #
            tokens.splice(i + 1, 1); // drop first #
          } else if (/^[1-9]$/.test(tok.text)) {
            var _tokens;

            // replace the placeholder with the indicated argument
            (_tokens = tokens).splice.apply(_tokens, [i, 2].concat(args[+tok.text - 1]));
          } else {
            throw new src_ParseError("Not a valid argument number", tok);
          }
        }
      }
    } // Concatenate expansion onto top of stack.


    this.pushTokens(tokens);
    return tokens;
  }
  /**
   * Expand the next token only once (if possible), and return the resulting
   * top token on the stack (without removing anything from the stack).
   * Similar in behavior to TeX's `\expandafter\futurelet`.
   * Equivalent to expandOnce() followed by future().
   */
  ;

  _proto.expandAfterFuture = function expandAfterFuture() {
    this.expandOnce();
    return this.future();
  }
  /**
   * Recursively expand first token, then return first non-expandable token.
   */
  ;

  _proto.expandNextToken = function expandNextToken() {
    for (;;) {
      var expanded = this.expandOnce(); // expandOnce returns Token if and only if it's fully expanded.

      if (expanded instanceof Token) {
        // \relax stops the expansion, but shouldn't get returned (a
        // null return value couldn't get implemented as a function).
        // the token after \noexpand is interpreted as if its meaning
        // were ‘\relax’
        if (expanded.text === "\\relax" || expanded.treatAsRelax) {
          this.stack.pop();
        } else {
          return this.stack.pop(); // === expanded
        }
      }
    } // Flow unable to figure out that this pathway is impossible.
    // https://github.com/facebook/flow/issues/4808


    throw new Error(); // eslint-disable-line no-unreachable
  }
  /**
   * Fully expand the given macro name and return the resulting list of
   * tokens, or return `undefined` if no such macro is defined.
   */
  ;

  _proto.expandMacro = function expandMacro(name) {
    return this.macros.has(name) ? this.expandTokens([new Token(name)]) : undefined;
  }
  /**
   * Fully expand the given token stream and return the resulting list of tokens
   */
  ;

  _proto.expandTokens = function expandTokens(tokens) {
    var output = [];
    var oldStackLength = this.stack.length;
    this.pushTokens(tokens);

    while (this.stack.length > oldStackLength) {
      var expanded = this.expandOnce(true); // expand only expandable tokens
      // expandOnce returns Token if and only if it's fully expanded.

      if (expanded instanceof Token) {
        if (expanded.treatAsRelax) {
          // the expansion of \noexpand is the token itself
          expanded.noexpand = false;
          expanded.treatAsRelax = false;
        }

        output.push(this.stack.pop());
      }
    }

    return output;
  }
  /**
   * Fully expand the given macro name and return the result as a string,
   * or return `undefined` if no such macro is defined.
   */
  ;

  _proto.expandMacroAsText = function expandMacroAsText(name) {
    var tokens = this.expandMacro(name);

    if (tokens) {
      return tokens.map(function (token) {
        return token.text;
      }).join("");
    } else {
      return tokens;
    }
  }
  /**
   * Returns the expanded macro as a reversed array of tokens and a macro
   * argument count.  Or returns `null` if no such macro.
   */
  ;

  _proto._getExpansion = function _getExpansion(name) {
    var definition = this.macros.get(name);

    if (definition == null) {
      // mainly checking for undefined here
      return definition;
    } // If a single character has an associated catcode other than 13
    // (active character), then don't expand it.


    if (name.length === 1) {
      var catcode = this.lexer.catcodes[name];

      if (catcode != null && catcode !== 13) {
        return;
      }
    }

    var expansion = typeof definition === "function" ? definition(this) : definition;

    if (typeof expansion === "string") {
      var numArgs = 0;

      if (expansion.indexOf("#") !== -1) {
        var stripped = expansion.replace(/##/g, "");

        while (stripped.indexOf("#" + (numArgs + 1)) !== -1) {
          ++numArgs;
        }
      }

      var bodyLexer = new Lexer(expansion, this.settings);
      var tokens = [];
      var tok = bodyLexer.lex();

      while (tok.text !== "EOF") {
        tokens.push(tok);
        tok = bodyLexer.lex();
      }

      tokens.reverse(); // to fit in with stack using push and pop

      var expanded = {
        tokens: tokens,
        numArgs: numArgs
      };
      return expanded;
    }

    return expansion;
  }
  /**
   * Determine whether a command is currently "defined" (has some
   * functionality), meaning that it's a macro (in the current group),
   * a function, a symbol, or one of the special commands listed in
   * `implicitCommands`.
   */
  ;

  _proto.isDefined = function isDefined(name) {
    return this.macros.has(name) || src_functions.hasOwnProperty(name) || src_symbols.math.hasOwnProperty(name) || src_symbols.text.hasOwnProperty(name) || implicitCommands.hasOwnProperty(name);
  }
  /**
   * Determine whether a command is expandable.
   */
  ;

  _proto.isExpandable = function isExpandable(name) {
    var macro = this.macros.get(name);
    return macro != null ? typeof macro === "string" || typeof macro === "function" || !macro.unexpandable : src_functions.hasOwnProperty(name) && !src_functions[name].primitive;
  };

  return MacroExpander;
}();
/* eslint no-constant-condition:0 */









 // Pre-evaluate both modules as unicodeSymbols require String.normalize()

var unicodeAccents = {
  "́": {
    "text": "\\'",
    "math": "\\acute"
  },
  "̀": {
    "text": "\\`",
    "math": "\\grave"
  },
  "̈": {
    "text": "\\\"",
    "math": "\\ddot"
  },
  "̃": {
    "text": "\\~",
    "math": "\\tilde"
  },
  "̄": {
    "text": "\\=",
    "math": "\\bar"
  },
  "̆": {
    "text": "\\u",
    "math": "\\breve"
  },
  "̌": {
    "text": "\\v",
    "math": "\\check"
  },
  "̂": {
    "text": "\\^",
    "math": "\\hat"
  },
  "̇": {
    "text": "\\.",
    "math": "\\dot"
  },
  "̊": {
    "text": "\\r",
    "math": "\\mathring"
  },
  "̋": {
    "text": "\\H"
  },
  "̧": {
    "text": "\\c"
  }
};
var unicodeSymbols = {
  "á": "á",
  "à": "à",
  "ä": "ä",
  "ǟ": "ǟ",
  "ã": "ã",
  "ā": "ā",
  "ă": "ă",
  "ắ": "ắ",
  "ằ": "ằ",
  "ẵ": "ẵ",
  "ǎ": "ǎ",
  "â": "â",
  "ấ": "ấ",
  "ầ": "ầ",
  "ẫ": "ẫ",
  "ȧ": "ȧ",
  "ǡ": "ǡ",
  "å": "å",
  "ǻ": "ǻ",
  "ḃ": "ḃ",
  "ć": "ć",
  "ḉ": "ḉ",
  "č": "č",
  "ĉ": "ĉ",
  "ċ": "ċ",
  "ç": "ç",
  "ď": "ď",
  "ḋ": "ḋ",
  "ḑ": "ḑ",
  "é": "é",
  "è": "è",
  "ë": "ë",
  "ẽ": "ẽ",
  "ē": "ē",
  "ḗ": "ḗ",
  "ḕ": "ḕ",
  "ĕ": "ĕ",
  "ḝ": "ḝ",
  "ě": "ě",
  "ê": "ê",
  "ế": "ế",
  "ề": "ề",
  "ễ": "ễ",
  "ė": "ė",
  "ȩ": "ȩ",
  "ḟ": "ḟ",
  "ǵ": "ǵ",
  "ḡ": "ḡ",
  "ğ": "ğ",
  "ǧ": "ǧ",
  "ĝ": "ĝ",
  "ġ": "ġ",
  "ģ": "ģ",
  "ḧ": "ḧ",
  "ȟ": "ȟ",
  "ĥ": "ĥ",
  "ḣ": "ḣ",
  "ḩ": "ḩ",
  "í": "í",
  "ì": "ì",
  "ï": "ï",
  "ḯ": "ḯ",
  "ĩ": "ĩ",
  "ī": "ī",
  "ĭ": "ĭ",
  "ǐ": "ǐ",
  "î": "î",
  "ǰ": "ǰ",
  "ĵ": "ĵ",
  "ḱ": "ḱ",
  "ǩ": "ǩ",
  "ķ": "ķ",
  "ĺ": "ĺ",
  "ľ": "ľ",
  "ļ": "ļ",
  "ḿ": "ḿ",
  "ṁ": "ṁ",
  "ń": "ń",
  "ǹ": "ǹ",
  "ñ": "ñ",
  "ň": "ň",
  "ṅ": "ṅ",
  "ņ": "ņ",
  "ó": "ó",
  "ò": "ò",
  "ö": "ö",
  "ȫ": "ȫ",
  "õ": "õ",
  "ṍ": "ṍ",
  "ṏ": "ṏ",
  "ȭ": "ȭ",
  "ō": "ō",
  "ṓ": "ṓ",
  "ṑ": "ṑ",
  "ŏ": "ŏ",
  "ǒ": "ǒ",
  "ô": "ô",
  "ố": "ố",
  "ồ": "ồ",
  "ỗ": "ỗ",
  "ȯ": "ȯ",
  "ȱ": "ȱ",
  "ő": "ő",
  "ṕ": "ṕ",
  "ṗ": "ṗ",
  "ŕ": "ŕ",
  "ř": "ř",
  "ṙ": "ṙ",
  "ŗ": "ŗ",
  "ś": "ś",
  "ṥ": "ṥ",
  "š": "š",
  "ṧ": "ṧ",
  "ŝ": "ŝ",
  "ṡ": "ṡ",
  "ş": "ş",
  "ẗ": "ẗ",
  "ť": "ť",
  "ṫ": "ṫ",
  "ţ": "ţ",
  "ú": "ú",
  "ù": "ù",
  "ü": "ü",
  "ǘ": "ǘ",
  "ǜ": "ǜ",
  "ǖ": "ǖ",
  "ǚ": "ǚ",
  "ũ": "ũ",
  "ṹ": "ṹ",
  "ū": "ū",
  "ṻ": "ṻ",
  "ŭ": "ŭ",
  "ǔ": "ǔ",
  "û": "û",
  "ů": "ů",
  "ű": "ű",
  "ṽ": "ṽ",
  "ẃ": "ẃ",
  "ẁ": "ẁ",
  "ẅ": "ẅ",
  "ŵ": "ŵ",
  "ẇ": "ẇ",
  "ẘ": "ẘ",
  "ẍ": "ẍ",
  "ẋ": "ẋ",
  "ý": "ý",
  "ỳ": "ỳ",
  "ÿ": "ÿ",
  "ỹ": "ỹ",
  "ȳ": "ȳ",
  "ŷ": "ŷ",
  "ẏ": "ẏ",
  "ẙ": "ẙ",
  "ź": "ź",
  "ž": "ž",
  "ẑ": "ẑ",
  "ż": "ż",
  "Á": "Á",
  "À": "À",
  "Ä": "Ä",
  "Ǟ": "Ǟ",
  "Ã": "Ã",
  "Ā": "Ā",
  "Ă": "Ă",
  "Ắ": "Ắ",
  "Ằ": "Ằ",
  "Ẵ": "Ẵ",
  "Ǎ": "Ǎ",
  "Â": "Â",
  "Ấ": "Ấ",
  "Ầ": "Ầ",
  "Ẫ": "Ẫ",
  "Ȧ": "Ȧ",
  "Ǡ": "Ǡ",
  "Å": "Å",
  "Ǻ": "Ǻ",
  "Ḃ": "Ḃ",
  "Ć": "Ć",
  "Ḉ": "Ḉ",
  "Č": "Č",
  "Ĉ": "Ĉ",
  "Ċ": "Ċ",
  "Ç": "Ç",
  "Ď": "Ď",
  "Ḋ": "Ḋ",
  "Ḑ": "Ḑ",
  "É": "É",
  "È": "È",
  "Ë": "Ë",
  "Ẽ": "Ẽ",
  "Ē": "Ē",
  "Ḗ": "Ḗ",
  "Ḕ": "Ḕ",
  "Ĕ": "Ĕ",
  "Ḝ": "Ḝ",
  "Ě": "Ě",
  "Ê": "Ê",
  "Ế": "Ế",
  "Ề": "Ề",
  "Ễ": "Ễ",
  "Ė": "Ė",
  "Ȩ": "Ȩ",
  "Ḟ": "Ḟ",
  "Ǵ": "Ǵ",
  "Ḡ": "Ḡ",
  "Ğ": "Ğ",
  "Ǧ": "Ǧ",
  "Ĝ": "Ĝ",
  "Ġ": "Ġ",
  "Ģ": "Ģ",
  "Ḧ": "Ḧ",
  "Ȟ": "Ȟ",
  "Ĥ": "Ĥ",
  "Ḣ": "Ḣ",
  "Ḩ": "Ḩ",
  "Í": "Í",
  "Ì": "Ì",
  "Ï": "Ï",
  "Ḯ": "Ḯ",
  "Ĩ": "Ĩ",
  "Ī": "Ī",
  "Ĭ": "Ĭ",
  "Ǐ": "Ǐ",
  "Î": "Î",
  "İ": "İ",
  "Ĵ": "Ĵ",
  "Ḱ": "Ḱ",
  "Ǩ": "Ǩ",
  "Ķ": "Ķ",
  "Ĺ": "Ĺ",
  "Ľ": "Ľ",
  "Ļ": "Ļ",
  "Ḿ": "Ḿ",
  "Ṁ": "Ṁ",
  "Ń": "Ń",
  "Ǹ": "Ǹ",
  "Ñ": "Ñ",
  "Ň": "Ň",
  "Ṅ": "Ṅ",
  "Ņ": "Ņ",
  "Ó": "Ó",
  "Ò": "Ò",
  "Ö": "Ö",
  "Ȫ": "Ȫ",
  "Õ": "Õ",
  "Ṍ": "Ṍ",
  "Ṏ": "Ṏ",
  "Ȭ": "Ȭ",
  "Ō": "Ō",
  "Ṓ": "Ṓ",
  "Ṑ": "Ṑ",
  "Ŏ": "Ŏ",
  "Ǒ": "Ǒ",
  "Ô": "Ô",
  "Ố": "Ố",
  "Ồ": "Ồ",
  "Ỗ": "Ỗ",
  "Ȯ": "Ȯ",
  "Ȱ": "Ȱ",
  "Ő": "Ő",
  "Ṕ": "Ṕ",
  "Ṗ": "Ṗ",
  "Ŕ": "Ŕ",
  "Ř": "Ř",
  "Ṙ": "Ṙ",
  "Ŗ": "Ŗ",
  "Ś": "Ś",
  "Ṥ": "Ṥ",
  "Š": "Š",
  "Ṧ": "Ṧ",
  "Ŝ": "Ŝ",
  "Ṡ": "Ṡ",
  "Ş": "Ş",
  "Ť": "Ť",
  "Ṫ": "Ṫ",
  "Ţ": "Ţ",
  "Ú": "Ú",
  "Ù": "Ù",
  "Ü": "Ü",
  "Ǘ": "Ǘ",
  "Ǜ": "Ǜ",
  "Ǖ": "Ǖ",
  "Ǚ": "Ǚ",
  "Ũ": "Ũ",
  "Ṹ": "Ṹ",
  "Ū": "Ū",
  "Ṻ": "Ṻ",
  "Ŭ": "Ŭ",
  "Ǔ": "Ǔ",
  "Û": "Û",
  "Ů": "Ů",
  "Ű": "Ű",
  "Ṽ": "Ṽ",
  "Ẃ": "Ẃ",
  "Ẁ": "Ẁ",
  "Ẅ": "Ẅ",
  "Ŵ": "Ŵ",
  "Ẇ": "Ẇ",
  "Ẍ": "Ẍ",
  "Ẋ": "Ẋ",
  "Ý": "Ý",
  "Ỳ": "Ỳ",
  "Ÿ": "Ÿ",
  "Ỹ": "Ỹ",
  "Ȳ": "Ȳ",
  "Ŷ": "Ŷ",
  "Ẏ": "Ẏ",
  "Ź": "Ź",
  "Ž": "Ž",
  "Ẑ": "Ẑ",
  "Ż": "Ż",
  "ά": "ά",
  "ὰ": "ὰ",
  "ᾱ": "ᾱ",
  "ᾰ": "ᾰ",
  "έ": "έ",
  "ὲ": "ὲ",
  "ή": "ή",
  "ὴ": "ὴ",
  "ί": "ί",
  "ὶ": "ὶ",
  "ϊ": "ϊ",
  "ΐ": "ΐ",
  "ῒ": "ῒ",
  "ῑ": "ῑ",
  "ῐ": "ῐ",
  "ό": "ό",
  "ὸ": "ὸ",
  "ύ": "ύ",
  "ὺ": "ὺ",
  "ϋ": "ϋ",
  "ΰ": "ΰ",
  "ῢ": "ῢ",
  "ῡ": "ῡ",
  "ῠ": "ῠ",
  "ώ": "ώ",
  "ὼ": "ὼ",
  "Ύ": "Ύ",
  "Ὺ": "Ὺ",
  "Ϋ": "Ϋ",
  "Ῡ": "Ῡ",
  "Ῠ": "Ῠ",
  "Ώ": "Ώ",
  "Ὼ": "Ὼ"
};

/**
 * This file contains the parser used to parse out a TeX expression from the
 * input. Since TeX isn't context-free, standard parsers don't work particularly
 * well.
 *
 * The strategy of this parser is as such:
 *
 * The main functions (the `.parse...` ones) take a position in the current
 * parse string to parse tokens from. The lexer (found in Lexer.js, stored at
 * this.gullet.lexer) also supports pulling out tokens at arbitrary places. When
 * individual tokens are needed at a position, the lexer is called to pull out a
 * token, which is then used.
 *
 * The parser has a property called "mode" indicating the mode that
 * the parser is currently in. Currently it has to be one of "math" or
 * "text", which denotes whether the current environment is a math-y
 * one or a text-y one (e.g. inside \text). Currently, this serves to
 * limit the functions which can be used in text mode.
 *
 * The main functions then return an object which contains the useful data that
 * was parsed at its given point, and a new position at the end of the parsed
 * data. The main functions can call each other and continue the parsing by
 * using the returned position as a new starting point.
 *
 * There are also extra `.handle...` functions, which pull out some reused
 * functionality into self-contained functions.
 *
 * The functions return ParseNodes.
 */
var Parser = /*#__PURE__*/function () {
  function Parser(input, settings) {
    this.mode = void 0;
    this.gullet = void 0;
    this.settings = void 0;
    this.leftrightDepth = void 0;
    this.nextToken = void 0;
    // Start in math mode
    this.mode = "math"; // Create a new macro expander (gullet) and (indirectly via that) also a
    // new lexer (mouth) for this parser (stomach, in the language of TeX)

    this.gullet = new MacroExpander(input, settings, this.mode); // Store the settings for use in parsing

    this.settings = settings; // Count leftright depth (for \middle errors)

    this.leftrightDepth = 0;
  }
  /**
   * Checks a result to make sure it has the right type, and throws an
   * appropriate error otherwise.
   */


  var _proto = Parser.prototype;

  _proto.expect = function expect(text, consume) {
    if (consume === void 0) {
      consume = true;
    }

    if (this.fetch().text !== text) {
      throw new src_ParseError("Expected '" + text + "', got '" + this.fetch().text + "'", this.fetch());
    }

    if (consume) {
      this.consume();
    }
  }
  /**
   * Discards the current lookahead token, considering it consumed.
   */
  ;

  _proto.consume = function consume() {
    this.nextToken = null;
  }
  /**
   * Return the current lookahead token, or if there isn't one (at the
   * beginning, or if the previous lookahead token was consume()d),
   * fetch the next token as the new lookahead token and return it.
   */
  ;

  _proto.fetch = function fetch() {
    if (this.nextToken == null) {
      this.nextToken = this.gullet.expandNextToken();
    }

    return this.nextToken;
  }
  /**
   * Switches between "text" and "math" modes.
   */
  ;

  _proto.switchMode = function switchMode(newMode) {
    this.mode = newMode;
    this.gullet.switchMode(newMode);
  }
  /**
   * Main parsing function, which parses an entire input.
   */
  ;

  _proto.parse = function parse() {
    if (!this.settings.globalGroup) {
      // Create a group namespace for the math expression.
      // (LaTeX creates a new group for every $...$, $$...$$, \[...\].)
      this.gullet.beginGroup();
    } // Use old \color behavior (same as LaTeX's \textcolor) if requested.
    // We do this within the group for the math expression, so it doesn't
    // pollute settings.macros.


    if (this.settings.colorIsTextColor) {
      this.gullet.macros.set("\\color", "\\textcolor");
    }

    try {
      // Try to parse the input
      var parse = this.parseExpression(false); // If we succeeded, make sure there's an EOF at the end

      this.expect("EOF"); // End the group namespace for the expression

      if (!this.settings.globalGroup) {
        this.gullet.endGroup();
      }

      return parse; // Close any leftover groups in case of a parse error.
    } finally {
      this.gullet.endGroups();
    }
  };

  /**
   * Parses an "expression", which is a list of atoms.
   *
   * `breakOnInfix`: Should the parsing stop when we hit infix nodes? This
   *                 happens when functions have higher precendence han infix
   *                 nodes in implicit parses.
   *
   * `breakOnTokenText`: The text of the token that the expression should end
   *                     with, or `null` if something else should end the
   *                     expression.
   */
  _proto.parseExpression = function parseExpression(breakOnInfix, breakOnTokenText) {
    var body = []; // Keep adding atoms to the body until we can't parse any more atoms (either
    // we reached the end, a }, or a \right)

    while (true) {
      // Ignore spaces in math mode
      if (this.mode === "math") {
        this.consumeSpaces();
      }

      var lex = this.fetch();

      if (Parser.endOfExpression.indexOf(lex.text) !== -1) {
        break;
      }

      if (breakOnTokenText && lex.text === breakOnTokenText) {
        break;
      }

      if (breakOnInfix && src_functions[lex.text] && src_functions[lex.text].infix) {
        break;
      }

      var atom = this.parseAtom(breakOnTokenText);

      if (!atom) {
        break;
      } else if (atom.type === "internal") {
        continue;
      }

      body.push(atom);
    }

    if (this.mode === "text") {
      this.formLigatures(body);
    }

    return this.handleInfixNodes(body);
  }
  /**
   * Rewrites infix operators such as \over with corresponding commands such
   * as \frac.
   *
   * There can only be one infix operator per group.  If there's more than one
   * then the expression is ambiguous.  This can be resolved by adding {}.
   */
  ;

  _proto.handleInfixNodes = function handleInfixNodes(body) {
    var overIndex = -1;
    var funcName;

    for (var i = 0; i < body.length; i++) {
      if (body[i].type === "infix") {
        if (overIndex !== -1) {
          throw new src_ParseError("only one infix operator per group", body[i].token);
        }

        overIndex = i;
        funcName = body[i].replaceWith;
      }
    }

    if (overIndex !== -1 && funcName) {
      var numerNode;
      var denomNode;
      var numerBody = body.slice(0, overIndex);
      var denomBody = body.slice(overIndex + 1);

      if (numerBody.length === 1 && numerBody[0].type === "ordgroup") {
        numerNode = numerBody[0];
      } else {
        numerNode = {
          type: "ordgroup",
          mode: this.mode,
          body: numerBody
        };
      }

      if (denomBody.length === 1 && denomBody[0].type === "ordgroup") {
        denomNode = denomBody[0];
      } else {
        denomNode = {
          type: "ordgroup",
          mode: this.mode,
          body: denomBody
        };
      }

      var node;

      if (funcName === "\\\\abovefrac") {
        node = this.callFunction(funcName, [numerNode, body[overIndex], denomNode], []);
      } else {
        node = this.callFunction(funcName, [numerNode, denomNode], []);
      }

      return [node];
    } else {
      return body;
    }
  }
  /**
   * Handle a subscript or superscript with nice errors.
   */
  ;

  _proto.handleSupSubscript = function handleSupSubscript(name // For error reporting.
  ) {
    var symbolToken = this.fetch();
    var symbol = symbolToken.text;
    this.consume();
    this.consumeSpaces(); // ignore spaces before sup/subscript argument

    var group = this.parseGroup(name);

    if (!group) {
      throw new src_ParseError("Expected group after '" + symbol + "'", symbolToken);
    }

    return group;
  }
  /**
   * Converts the textual input of an unsupported command into a text node
   * contained within a color node whose color is determined by errorColor
   */
  ;

  _proto.formatUnsupportedCmd = function formatUnsupportedCmd(text) {
    var textordArray = [];

    for (var i = 0; i < text.length; i++) {
      textordArray.push({
        type: "textord",
        mode: "text",
        text: text[i]
      });
    }

    var textNode = {
      type: "text",
      mode: this.mode,
      body: textordArray
    };
    var colorNode = {
      type: "color",
      mode: this.mode,
      color: this.settings.errorColor,
      body: [textNode]
    };
    return colorNode;
  }
  /**
   * Parses a group with optional super/subscripts.
   */
  ;

  _proto.parseAtom = function parseAtom(breakOnTokenText) {
    // The body of an atom is an implicit group, so that things like
    // \left(x\right)^2 work correctly.
    var base = this.parseGroup("atom", breakOnTokenText); // In text mode, we don't have superscripts or subscripts

    if (this.mode === "text") {
      return base;
    } // Note that base may be empty (i.e. null) at this point.


    var superscript;
    var subscript;

    while (true) {
      // Guaranteed in math mode, so eat any spaces first.
      this.consumeSpaces(); // Lex the first token

      var lex = this.fetch();

      if (lex.text === "\\limits" || lex.text === "\\nolimits") {
        // We got a limit control
        if (base && base.type === "op") {
          var limits = lex.text === "\\limits";
          base.limits = limits;
          base.alwaysHandleSupSub = true;
        } else if (base && base.type === "operatorname") {
          if (base.alwaysHandleSupSub) {
            base.limits = lex.text === "\\limits";
          }
        } else {
          throw new src_ParseError("Limit controls must follow a math operator", lex);
        }

        this.consume();
      } else if (lex.text === "^") {
        // We got a superscript start
        if (superscript) {
          throw new src_ParseError("Double superscript", lex);
        }

        superscript = this.handleSupSubscript("superscript");
      } else if (lex.text === "_") {
        // We got a subscript start
        if (subscript) {
          throw new src_ParseError("Double subscript", lex);
        }

        subscript = this.handleSupSubscript("subscript");
      } else if (lex.text === "'") {
        // We got a prime
        if (superscript) {
          throw new src_ParseError("Double superscript", lex);
        }

        var prime = {
          type: "textord",
          mode: this.mode,
          text: "\\prime"
        }; // Many primes can be grouped together, so we handle this here

        var primes = [prime];
        this.consume(); // Keep lexing tokens until we get something that's not a prime

        while (this.fetch().text === "'") {
          // For each one, add another prime to the list
          primes.push(prime);
          this.consume();
        } // If there's a superscript following the primes, combine that
        // superscript in with the primes.


        if (this.fetch().text === "^") {
          primes.push(this.handleSupSubscript("superscript"));
        } // Put everything into an ordgroup as the superscript


        superscript = {
          type: "ordgroup",
          mode: this.mode,
          body: primes
        };
      } else {
        // If it wasn't ^, _, or ', stop parsing super/subscripts
        break;
      }
    } // Base must be set if superscript or subscript are set per logic above,
    // but need to check here for type check to pass.


    if (superscript || subscript) {
      // If we got either a superscript or subscript, create a supsub
      return {
        type: "supsub",
        mode: this.mode,
        base: base,
        sup: superscript,
        sub: subscript
      };
    } else {
      // Otherwise return the original body
      return base;
    }
  }
  /**
   * Parses an entire function, including its base and all of its arguments.
   */
  ;

  _proto.parseFunction = function parseFunction(breakOnTokenText, name // For determining its context
  ) {
    var token = this.fetch();
    var func = token.text;
    var funcData = src_functions[func];

    if (!funcData) {
      return null;
    }

    this.consume(); // consume command token

    if (name && name !== "atom" && !funcData.allowedInArgument) {
      throw new src_ParseError("Got function '" + func + "' with no arguments" + (name ? " as " + name : ""), token);
    } else if (this.mode === "text" && !funcData.allowedInText) {
      throw new src_ParseError("Can't use function '" + func + "' in text mode", token);
    } else if (this.mode === "math" && funcData.allowedInMath === false) {
      throw new src_ParseError("Can't use function '" + func + "' in math mode", token);
    }

    var _this$parseArguments = this.parseArguments(func, funcData),
        args = _this$parseArguments.args,
        optArgs = _this$parseArguments.optArgs;

    return this.callFunction(func, args, optArgs, token, breakOnTokenText);
  }
  /**
   * Call a function handler with a suitable context and arguments.
   */
  ;

  _proto.callFunction = function callFunction(name, args, optArgs, token, breakOnTokenText) {
    var context = {
      funcName: name,
      parser: this,
      token: token,
      breakOnTokenText: breakOnTokenText
    };
    var func = src_functions[name];

    if (func && func.handler) {
      return func.handler(context, args, optArgs);
    } else {
      throw new src_ParseError("No function handler for " + name);
    }
  }
  /**
   * Parses the arguments of a function or environment
   */
  ;

  _proto.parseArguments = function parseArguments(func, // Should look like "\name" or "\begin{name}".
  funcData) {
    var totalArgs = funcData.numArgs + funcData.numOptionalArgs;

    if (totalArgs === 0) {
      return {
        args: [],
        optArgs: []
      };
    }

    var args = [];
    var optArgs = [];

    for (var i = 0; i < totalArgs; i++) {
      var argType = funcData.argTypes && funcData.argTypes[i];
      var isOptional = i < funcData.numOptionalArgs;

      if (funcData.primitive && argType == null || // \sqrt expands into primitive if optional argument doesn't exist
      funcData.type === "sqrt" && i === 1 && optArgs[0] == null) {
        argType = "primitive";
      }

      var arg = this.parseGroupOfType("argument to '" + func + "'", argType, isOptional);

      if (isOptional) {
        optArgs.push(arg);
      } else if (arg != null) {
        args.push(arg);
      } else {
        // should be unreachable
        throw new src_ParseError("Null argument, please report this as a bug");
      }
    }

    return {
      args: args,
      optArgs: optArgs
    };
  }
  /**
   * Parses a group when the mode is changing.
   */
  ;

  _proto.parseGroupOfType = function parseGroupOfType(name, type, optional) {
    switch (type) {
      case "color":
        return this.parseColorGroup(optional);

      case "size":
        return this.parseSizeGroup(optional);

      case "url":
        return this.parseUrlGroup(optional);

      case "math":
      case "text":
        return this.parseArgumentGroup(optional, type);

      case "hbox":
        {
          // hbox argument type wraps the argument in the equivalent of
          // \hbox, which is like \text but switching to \textstyle size.
          var group = this.parseArgumentGroup(optional, "text");
          return group != null ? {
            type: "styling",
            mode: group.mode,
            body: [group],
            style: "text" // simulate \textstyle

          } : null;
        }

      case "raw":
        {
          var token = this.parseStringGroup("raw", optional);
          return token != null ? {
            type: "raw",
            mode: "text",
            string: token.text
          } : null;
        }

      case "primitive":
        {
          if (optional) {
            throw new src_ParseError("A primitive argument cannot be optional");
          }

          var _group = this.parseGroup(name);

          if (_group == null) {
            throw new src_ParseError("Expected group as " + name, this.fetch());
          }

          return _group;
        }

      case "original":
      case null:
      case undefined:
        return this.parseArgumentGroup(optional);

      default:
        throw new src_ParseError("Unknown group type as " + name, this.fetch());
    }
  }
  /**
   * Discard any space tokens, fetching the next non-space token.
   */
  ;

  _proto.consumeSpaces = function consumeSpaces() {
    while (this.fetch().text === " ") {
      this.consume();
    }
  }
  /**
   * Parses a group, essentially returning the string formed by the
   * brace-enclosed tokens plus some position information.
   */
  ;

  _proto.parseStringGroup = function parseStringGroup(modeName, // Used to describe the mode in error messages.
  optional) {
    var argToken = this.gullet.scanArgument(optional);

    if (argToken == null) {
      return null;
    }

    var str = "";
    var nextToken;

    while ((nextToken = this.fetch()).text !== "EOF") {
      str += nextToken.text;
      this.consume();
    }

    this.consume(); // consume the end of the argument

    argToken.text = str;
    return argToken;
  }
  /**
   * Parses a regex-delimited group: the largest sequence of tokens
   * whose concatenated strings match `regex`. Returns the string
   * formed by the tokens plus some position information.
   */
  ;

  _proto.parseRegexGroup = function parseRegexGroup(regex, modeName // Used to describe the mode in error messages.
  ) {
    var firstToken = this.fetch();
    var lastToken = firstToken;
    var str = "";
    var nextToken;

    while ((nextToken = this.fetch()).text !== "EOF" && regex.test(str + nextToken.text)) {
      lastToken = nextToken;
      str += lastToken.text;
      this.consume();
    }

    if (str === "") {
      throw new src_ParseError("Invalid " + modeName + ": '" + firstToken.text + "'", firstToken);
    }

    return firstToken.range(lastToken, str);
  }
  /**
   * Parses a color description.
   */
  ;

  _proto.parseColorGroup = function parseColorGroup(optional) {
    var res = this.parseStringGroup("color", optional);

    if (res == null) {
      return null;
    }

    var match = /^(#[a-f0-9]{3}|#?[a-f0-9]{6}|[a-z]+)$/i.exec(res.text);

    if (!match) {
      throw new src_ParseError("Invalid color: '" + res.text + "'", res);
    }

    var color = match[0];

    if (/^[0-9a-f]{6}$/i.test(color)) {
      // We allow a 6-digit HTML color spec without a leading "#".
      // This follows the xcolor package's HTML color model.
      // Predefined color names are all missed by this RegEx pattern.
      color = "#" + color;
    }

    return {
      type: "color-token",
      mode: this.mode,
      color: color
    };
  }
  /**
   * Parses a size specification, consisting of magnitude and unit.
   */
  ;

  _proto.parseSizeGroup = function parseSizeGroup(optional) {
    var res;
    var isBlank = false; // don't expand before parseStringGroup

    this.gullet.consumeSpaces();

    if (!optional && this.gullet.future().text !== "{") {
      res = this.parseRegexGroup(/^[-+]? *(?:$|\d+|\d+\.\d*|\.\d*) *[a-z]{0,2} *$/, "size");
    } else {
      res = this.parseStringGroup("size", optional);
    }

    if (!res) {
      return null;
    }

    if (!optional && res.text.length === 0) {
      // Because we've tested for what is !optional, this block won't
      // affect \kern, \hspace, etc. It will capture the mandatory arguments
      // to \genfrac and \above.
      res.text = "0pt"; // Enable \above{}

      isBlank = true; // This is here specifically for \genfrac
    }

    var match = /([-+]?) *(\d+(?:\.\d*)?|\.\d+) *([a-z]{2})/.exec(res.text);

    if (!match) {
      throw new src_ParseError("Invalid size: '" + res.text + "'", res);
    }

    var data = {
      number: +(match[1] + match[2]),
      // sign + magnitude, cast to number
      unit: match[3]
    };

    if (!validUnit(data)) {
      throw new src_ParseError("Invalid unit: '" + data.unit + "'", res);
    }

    return {
      type: "size",
      mode: this.mode,
      value: data,
      isBlank: isBlank
    };
  }
  /**
   * Parses an URL, checking escaped letters and allowed protocols,
   * and setting the catcode of % as an active character (as in \hyperref).
   */
  ;

  _proto.parseUrlGroup = function parseUrlGroup(optional) {
    this.gullet.lexer.setCatcode("%", 13); // active character

    this.gullet.lexer.setCatcode("~", 12); // other character

    var res = this.parseStringGroup("url", optional);
    this.gullet.lexer.setCatcode("%", 14); // comment character

    this.gullet.lexer.setCatcode("~", 13); // active character

    if (res == null) {
      return null;
    } // hyperref package allows backslashes alone in href, but doesn't
    // generate valid links in such cases; we interpret this as
    // "undefined" behaviour, and keep them as-is. Some browser will
    // replace backslashes with forward slashes.


    var url = res.text.replace(/\\([#$%&~_^{}])/g, '$1');
    return {
      type: "url",
      mode: this.mode,
      url: url
    };
  }
  /**
   * Parses an argument with the mode specified.
   */
  ;

  _proto.parseArgumentGroup = function parseArgumentGroup(optional, mode) {
    var argToken = this.gullet.scanArgument(optional);

    if (argToken == null) {
      return null;
    }

    var outerMode = this.mode;

    if (mode) {
      // Switch to specified mode
      this.switchMode(mode);
    }

    this.gullet.beginGroup();
    var expression = this.parseExpression(false, "EOF"); // TODO: find an alternative way to denote the end

    this.expect("EOF"); // expect the end of the argument

    this.gullet.endGroup();
    var result = {
      type: "ordgroup",
      mode: this.mode,
      loc: argToken.loc,
      body: expression
    };

    if (mode) {
      // Switch mode back
      this.switchMode(outerMode);
    }

    return result;
  }
  /**
   * Parses an ordinary group, which is either a single nucleus (like "x")
   * or an expression in braces (like "{x+y}") or an implicit group, a group
   * that starts at the current position, and ends right before a higher explicit
   * group ends, or at EOF.
   */
  ;

  _proto.parseGroup = function parseGroup(name, // For error reporting.
  breakOnTokenText) {
    var firstToken = this.fetch();
    var text = firstToken.text;
    var result; // Try to parse an open brace or \begingroup

    if (text === "{" || text === "\\begingroup") {
      this.consume();
      var groupEnd = text === "{" ? "}" : "\\endgroup";
      this.gullet.beginGroup(); // If we get a brace, parse an expression

      var expression = this.parseExpression(false, groupEnd);
      var lastToken = this.fetch();
      this.expect(groupEnd); // Check that we got a matching closing brace

      this.gullet.endGroup();
      result = {
        type: "ordgroup",
        mode: this.mode,
        loc: SourceLocation.range(firstToken, lastToken),
        body: expression,
        // A group formed by \begingroup...\endgroup is a semi-simple group
        // which doesn't affect spacing in math mode, i.e., is transparent.
        // https://tex.stackexchange.com/questions/1930/when-should-one-
        // use-begingroup-instead-of-bgroup
        semisimple: text === "\\begingroup" || undefined
      };
    } else {
      // If there exists a function with this name, parse the function.
      // Otherwise, just return a nucleus
      result = this.parseFunction(breakOnTokenText, name) || this.parseSymbol();

      if (result == null && text[0] === "\\" && !implicitCommands.hasOwnProperty(text)) {
        if (this.settings.throwOnError) {
          throw new src_ParseError("Undefined control sequence: " + text, firstToken);
        }

        result = this.formatUnsupportedCmd(text);
        this.consume();
      }
    }

    return result;
  }
  /**
   * Form ligature-like combinations of characters for text mode.
   * This includes inputs like "--", "---", "``" and "''".
   * The result will simply replace multiple textord nodes with a single
   * character in each value by a single textord node having multiple
   * characters in its value.  The representation is still ASCII source.
   * The group will be modified in place.
   */
  ;

  _proto.formLigatures = function formLigatures(group) {
    var n = group.length - 1;

    for (var i = 0; i < n; ++i) {
      var a = group[i]; // $FlowFixMe: Not every node type has a `text` property.

      var v = a.text;

      if (v === "-" && group[i + 1].text === "-") {
        if (i + 1 < n && group[i + 2].text === "-") {
          group.splice(i, 3, {
            type: "textord",
            mode: "text",
            loc: SourceLocation.range(a, group[i + 2]),
            text: "---"
          });
          n -= 2;
        } else {
          group.splice(i, 2, {
            type: "textord",
            mode: "text",
            loc: SourceLocation.range(a, group[i + 1]),
            text: "--"
          });
          n -= 1;
        }
      }

      if ((v === "'" || v === "`") && group[i + 1].text === v) {
        group.splice(i, 2, {
          type: "textord",
          mode: "text",
          loc: SourceLocation.range(a, group[i + 1]),
          text: v + v
        });
        n -= 1;
      }
    }
  }
  /**
   * Parse a single symbol out of the string. Here, we handle single character
   * symbols and special functions like \verb.
   */
  ;

  _proto.parseSymbol = function parseSymbol() {
    var nucleus = this.fetch();
    var text = nucleus.text;

    if (/^\\verb[^a-zA-Z]/.test(text)) {
      this.consume();
      var arg = text.slice(5);
      var star = arg.charAt(0) === "*";

      if (star) {
        arg = arg.slice(1);
      } // Lexer's tokenRegex is constructed to always have matching
      // first/last characters.


      if (arg.length < 2 || arg.charAt(0) !== arg.slice(-1)) {
        throw new src_ParseError("\\verb assertion failed --\n                    please report what input caused this bug");
      }

      arg = arg.slice(1, -1); // remove first and last char

      return {
        type: "verb",
        mode: "text",
        body: arg,
        star: star
      };
    } // At this point, we should have a symbol, possibly with accents.
    // First expand any accented base symbol according to unicodeSymbols.


    if (unicodeSymbols.hasOwnProperty(text[0]) && !src_symbols[this.mode][text[0]]) {
      // This behavior is not strict (XeTeX-compatible) in math mode.
      if (this.settings.strict && this.mode === "math") {
        this.settings.reportNonstrict("unicodeTextInMathMode", "Accented Unicode text character \"" + text[0] + "\" used in " + "math mode", nucleus);
      }

      text = unicodeSymbols[text[0]] + text.substr(1);
    } // Strip off any combining characters


    var match = combiningDiacriticalMarksEndRegex.exec(text);

    if (match) {
      text = text.substring(0, match.index);

      if (text === 'i') {
        text = "\u0131"; // dotless i, in math and text mode
      } else if (text === 'j') {
        text = "\u0237"; // dotless j, in math and text mode
      }
    } // Recognize base symbol


    var symbol;

    if (src_symbols[this.mode][text]) {
      if (this.settings.strict && this.mode === 'math' && extraLatin.indexOf(text) >= 0) {
        this.settings.reportNonstrict("unicodeTextInMathMode", "Latin-1/Unicode text character \"" + text[0] + "\" used in " + "math mode", nucleus);
      }

      var group = src_symbols[this.mode][text].group;
      var loc = SourceLocation.range(nucleus);
      var s;

      if (ATOMS.hasOwnProperty(group)) {
        // $FlowFixMe
        var family = group;
        s = {
          type: "atom",
          mode: this.mode,
          family: family,
          loc: loc,
          text: text
        };
      } else {
        // $FlowFixMe
        s = {
          type: group,
          mode: this.mode,
          loc: loc,
          text: text
        };
      } // $FlowFixMe


      symbol = s;
    } else if (text.charCodeAt(0) >= 0x80) {
      // no symbol for e.g. ^
      if (this.settings.strict) {
        if (!supportedCodepoint(text.charCodeAt(0))) {
          this.settings.reportNonstrict("unknownSymbol", "Unrecognized Unicode character \"" + text[0] + "\"" + (" (" + text.charCodeAt(0) + ")"), nucleus);
        } else if (this.mode === "math") {
          this.settings.reportNonstrict("unicodeTextInMathMode", "Unicode text character \"" + text[0] + "\" used in math mode", nucleus);
        }
      } // All nonmathematical Unicode characters are rendered as if they
      // are in text mode (wrapped in \text) because that's what it
      // takes to render them in LaTeX.  Setting `mode: this.mode` is
      // another natural choice (the user requested math mode), but
      // this makes it more difficult for getCharacterMetrics() to
      // distinguish Unicode characters without metrics and those for
      // which we want to simulate the letter M.


      symbol = {
        type: "textord",
        mode: "text",
        loc: SourceLocation.range(nucleus),
        text: text
      };
    } else {
      return null; // EOF, ^, _, {, }, etc.
    }

    this.consume(); // Transform combining characters into accents

    if (match) {
      for (var i = 0; i < match[0].length; i++) {
        var accent = match[0][i];

        if (!unicodeAccents[accent]) {
          throw new src_ParseError("Unknown accent ' " + accent + "'", nucleus);
        }

        var command = unicodeAccents[accent][this.mode] || unicodeAccents[accent].text;

        if (!command) {
          throw new src_ParseError("Accent " + accent + " unsupported in " + this.mode + " mode", nucleus);
        }

        symbol = {
          type: "accent",
          mode: this.mode,
          loc: SourceLocation.range(nucleus),
          label: command,
          isStretchy: false,
          isShifty: true,
          // $FlowFixMe
          base: symbol
        };
      }
    } // $FlowFixMe


    return symbol;
  };

  return Parser;
}();

Parser.endOfExpression = ["}", "\\endgroup", "\\end", "\\right", "&"];
/**
 * Provides a single function for parsing an expression using a Parser
 * TODO(emily): Remove this
 */



/**
 * Parses an expression using a Parser, then returns the parsed result.
 */
var parseTree = function parseTree(toParse, settings) {
  if (!(typeof toParse === 'string' || toParse instanceof String)) {
    throw new TypeError('KaTeX can only parse string typed expression');
  }

  var parser = new Parser(toParse, settings); // Blank out any \df@tag to avoid spurious "Duplicate \tag" errors

  delete parser.gullet.macros.current["\\df@tag"];
  var tree = parser.parse(); // Prevent a color definition from persisting between calls to katex.render().

  delete parser.gullet.macros.current["\\current@color"];
  delete parser.gullet.macros.current["\\color"]; // If the input used \tag, it will set the \df@tag macro to the tag.
  // In this case, we separately parse the tag and wrap the tree.

  if (parser.gullet.macros.get("\\df@tag")) {
    if (!settings.displayMode) {
      throw new src_ParseError("\\tag works only in display equations");
    }

    parser.gullet.feed("\\df@tag");
    tree = [{
      type: "tag",
      mode: "text",
      body: tree,
      tag: parser.parse()
    }];
  }

  return tree;
};

/* harmony default export */ var src_parseTree = (parseTree);
/* eslint no-console:0 */

/**
 * This is the main entry point for KaTeX. Here, we expose functions for
 * rendering expressions either to DOM nodes or to markup strings.
 *
 * We also expose the ParseError class to check if errors thrown from KaTeX are
 * errors in the expression, or errors in javascript handling.
 */










/**
 * Parse and build an expression, and place that expression in the DOM node
 * given.
 */
var render = function render(expression, baseNode, options) {
  baseNode.textContent = "";
  var node = renderToDomTree(expression, options).toNode();
  baseNode.appendChild(node);
}; // KaTeX's styles don't work properly in quirks mode. Print out an error, and
// disable rendering.


if (typeof document !== "undefined") {
  if (document.compatMode !== "CSS1Compat") {
    typeof console !== "undefined" && console.warn("Warning: KaTeX doesn't work in quirks mode. Make sure your " + "website has a suitable doctype.");

    render = function render() {
      throw new src_ParseError("KaTeX doesn't work in quirks mode.");
    };
  }
}
/**
 * Parse and build an expression, and return the markup for that.
 */


var renderToString = function renderToString(expression, options) {
  var markup = renderToDomTree(expression, options).toMarkup();
  return markup;
};
/**
 * Parse an expression and return the parse tree.
 */


var generateParseTree = function generateParseTree(expression, options) {
  var settings = new Settings(options);
  return src_parseTree(expression, settings);
};
/**
 * If the given error is a KaTeX ParseError and options.throwOnError is false,
 * renders the invalid LaTeX as a span with hover title giving the KaTeX
 * error message.  Otherwise, simply throws the error.
 */


var renderError = function renderError(error, expression, options) {
  if (options.throwOnError || !(error instanceof src_ParseError)) {
    throw error;
  }

  var node = buildCommon.makeSpan(["katex-error"], [new SymbolNode(expression)]);
  node.setAttribute("title", error.toString());
  node.setAttribute("style", "color:" + options.errorColor);
  return node;
};
/**
 * Generates and returns the katex build tree. This is used for advanced
 * use cases (like rendering to custom output).
 */


var renderToDomTree = function renderToDomTree(expression, options) {
  var settings = new Settings(options);

  try {
    var tree = src_parseTree(expression, settings);
    return buildTree(tree, expression, settings);
  } catch (error) {
    return renderError(error, expression, settings);
  }
};
/**
 * Generates and returns the katex build tree, with just HTML (no MathML).
 * This is used for advanced use cases (like rendering to custom output).
 */


var renderToHTMLTree = function renderToHTMLTree(expression, options) {
  var settings = new Settings(options);

  try {
    var tree = src_parseTree(expression, settings);
    return buildHTMLTree(tree, expression, settings);
  } catch (error) {
    return renderError(error, expression, settings);
  }
};

/* harmony default export */ var katex = ({
  /**
   * Current KaTeX version
   */
  version: "0.13.24",

  /**
   * Renders the given LaTeX into an HTML+MathML combination, and adds
   * it as a child to the specified DOM node.
   */
  render: render,

  /**
   * Renders the given LaTeX into an HTML+MathML combination string,
   * for sending to the client.
   */
  renderToString: renderToString,

  /**
   * KaTeX error, usually during parsing.
   */
  ParseError: src_ParseError,

  /**
   * Parses the given LaTeX into KaTeX's internal parse tree structure,
   * without rendering to HTML or MathML.
   *
   * NOTE: This method is not currently recommended for public use.
   * The internal tree representation is unstable and is very likely
   * to change. Use at your own risk.
   */
  __parse: generateParseTree,

  /**
   * Renders the given LaTeX into an HTML+MathML internal DOM tree
   * representation, without flattening that representation to a string.
   *
   * NOTE: This method is not currently recommended for public use.
   * The internal tree representation is unstable and is very likely
   * to change. Use at your own risk.
   */
  __renderToDomTree: renderToDomTree,

  /**
   * Renders the given LaTeX into an HTML internal DOM tree representation,
   * without MathML and without flattening that representation to a string.
   *
   * NOTE: This method is not currently recommended for public use.
   * The internal tree representation is unstable and is very likely
   * to change. Use at your own risk.
   */
  __renderToHTMLTree: renderToHTMLTree,

  /**
   * extends internal font metrics object with a new object
   * each key in the new object represents a font name
  */
  __setFontMetrics: setFontMetrics,

  /**
   * adds a new symbol to builtin symbols table
   */
  __defineSymbol: defineSymbol,

  /**
   * adds a new macro to builtin macro list
   */
  __defineMacro: defineMacro,

  /**
   * Expose the dom tree node types, which can be useful for type checking nodes.
   *
   * NOTE: This method is not currently recommended for public use.
   * The internal tree representation is unstable and is very likely
   * to change. Use at your own risk.
   */
  __domTree: {
    Span: Span,
    Anchor: Anchor,
    SymbolNode: SymbolNode,
    SvgNode: SvgNode,
    PathNode: PathNode,
    LineNode: LineNode
  }
});
/**
 * This is the webpack entry point for KaTeX. As ECMAScript, flow[1] and jest[2]
 * doesn't support CSS modules natively, a separate entry point is used and
 * it is not flowtyped.
 *
 * [1] https://gist.github.com/lambdahands/d19e0da96285b749f0ef
 * [2] https://facebook.github.io/jest/docs/en/webpack.html
 */


/* harmony default export */ var katex_webpack = (katex);
__webpack_exports__ = __webpack_exports__["default"];
/******/ 	return __webpack_exports__;
/******/ })()
;
});
});

/*! markmap-lib v0.11.6 | MIT License */

var browser = createCommonjsModule(function (module, exports) {
(function (global, factory) {
factory(exports, katex) ;
}(commonjsGlobal, (function (exports, require$$0) {
function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e['default'] : e; }

var require$$0__default = /*#__PURE__*/_interopDefaultLegacy(require$$0);

function _extends$1() {
  _extends$1 = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends$1.apply(this, arguments);
}

/*! markmap-common v0.1.5 | MIT License */
class Hook {
  constructor() {
    this.listeners = [];
  }

  tap(fn) {
    this.listeners.push(fn);
    return () => this.revoke(fn);
  }

  revoke(fn) {
    const i = this.listeners.indexOf(fn);
    if (i >= 0) this.listeners.splice(i, 1);
  }

  revokeAll() {
    this.listeners.splice(0);
  }

  call(...args) {
    for (const fn of this.listeners) {
      fn(...args);
    }
  }

}

function _extends() {
  _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  return _extends.apply(this, arguments);
}

function escapeHtml$1(html) {
  return html.replace(/[&<"]/g, m => ({
    '&': '&amp;',
    '<': '&lt;',
    '"': '&quot;'
  })[m]);
}

function escapeScript(content) {
  return content.replace(/<(\/script>)/g, '\\x3c$2');
}

function htmlOpen(tagName, attrs) {
  const attrStr = attrs ? Object.entries(attrs).map(([key, value]) => {
    if (value == null || value === false) return;
    key = ` ${escapeHtml$1(key)}`;
    if (value === true) return key;
    return `${key}="${escapeHtml$1(value)}"`;
  }).filter(Boolean).join('') : '';
  return `<${tagName}${attrStr}>`;
}

function htmlClose(tagName) {
  return `</${tagName}>`;
}

function wrapHtml(tagName, content, attrs) {
  if (content == null) return htmlOpen(tagName, attrs);
  return htmlOpen(tagName, attrs) + (content || '') + htmlClose(tagName);
}

function buildCode(fn, args) {
  const params = args.map(arg => {
    if (typeof arg === 'function') return arg.toString();
    return JSON.stringify(arg != null ? arg : null);
  }).join(',');
  return `(${fn.toString()})(${params})`;
}

function persistJS(items, context) {
  return items.map(item => {
    if (item.type === 'script') return wrapHtml('script', '', item.data);

    if (item.type === 'iife') {
      const {
        fn,
        getParams
      } = item.data;
      return wrapHtml('script', escapeScript(buildCode(fn, (getParams == null ? void 0 : getParams(context)) || [])));
    }

    return '';
  });
}

function persistCSS(items) {
  return items.map(item => {
    if (item.type === 'stylesheet') {
      return wrapHtml('link', null, _extends({
        rel: 'stylesheet'
      }, item.data));
    }
    /* else if (item.type === 'style') */


    return wrapHtml('style', item.data);
  });
}

Math.random().toString(36).slice(2, 8);

function wrapFunction(fn, {
  before,
  after
}) {
  return function wrapped(...args) {
    const ctx = {
      args
    };

    try {
      if (before) before(ctx);
    } catch (_unused) {// ignore
    }

    ctx.result = fn(...args);

    try {
      if (after) after(ctx);
    } catch (_unused2) {// ignore
    }

    return ctx.result;
  };
}

function memoize(fn) {
  const cache = {};
  return function memoized(...args) {
    const key = `${args[0]}`;
    let data = cache[key];

    if (!data) {
      data = {
        value: fn(...args)
      };
      cache[key] = data;
    }

    return data.value;
  };
}

function createElement(tagName, props, attrs) {
  const el = document.createElement(tagName);

  if (props) {
    Object.entries(props).forEach(([key, value]) => {
      el[key] = value;
    });
  }

  if (attrs) {
    Object.entries(attrs).forEach(([key, value]) => {
      el.setAttribute(key, value);
    });
  }

  return el;
}

const memoizedPreloadJS = memoize(url => {
  document.head.append(createElement('link', {
    rel: 'preload',
    as: 'script',
    href: url
  }));
});

function loadJSItem(item, context) {
  if (item.type === 'script') {
    return new Promise((resolve, reject) => {
      var _item$data;

      document.head.append(createElement('script', _extends({}, item.data, {
        onload: resolve,
        onerror: reject
      }))); // Run inline script synchronously

      if (!((_item$data = item.data) != null && _item$data.src)) resolve();
    });
  }

  if (item.type === 'iife') {
    const {
      fn,
      getParams
    } = item.data;
    fn(...((getParams == null ? void 0 : getParams(context)) || []));
  }
}

async function loadJS(items, context) {
  const needPreload = items.filter(item => {
    var _item$data2;

    return item.type === 'script' && ((_item$data2 = item.data) == null ? void 0 : _item$data2.src);
  });
  if (needPreload.length > 1) needPreload.forEach(item => memoizedPreloadJS(item.data.src));
  context = _extends({
    getMarkmap: () => window.markmap
  }, context);

  for (const item of items) {
    await loadJSItem(item, context);
  }
}

const template = "<!DOCTYPE html>\n<html>\n<head>\n<meta charset=\"UTF-8\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n<meta http-equiv=\"X-UA-Compatible\" content=\"ie=edge\">\n<title>Markmap</title>\n<style>\n* {\n  margin: 0;\n  padding: 0;\n}\n#mindmap {\n  display: block;\n  width: 100vw;\n  height: 100vh;\n}\n</style>\n<!--CSS-->\n</head>\n<body>\n<svg id=\"mindmap\"></svg>\n<!--JS-->\n</body>\n</html>\n";
const BASE_JS = [`https://cdn.jsdelivr.net/npm/d3@${"6.6.0"}`, `https://cdn.jsdelivr.net/npm/markmap-view@${"0.2.6"}`].map(src => ({
  type: 'script',
  data: {
    src
  }
}));
function fillTemplate(data, assets, extra) {
  if (typeof extra === 'function') {
    extra = {
      getOptions: extra
    };
  }

  extra = _extends$1({
    baseJs: BASE_JS
  }, extra);
  const {
    scripts,
    styles
  } = assets;
  const cssList = [...(styles ? persistCSS(styles) : [])];
  const context = {
    getMarkmap: () => window.markmap,
    getOptions: extra.getOptions,
    data
  };
  const jsList = [...persistJS(extra.baseJs), ...persistJS([...(scripts || []), {
    type: 'iife',
    data: {
      fn: (getMarkmap, getOptions, data) => {
        const {
          Markmap
        } = getMarkmap();
        window.mm = Markmap.create('svg#mindmap', getOptions == null ? void 0 : getOptions(), data);
      },
      getParams: ({
        getMarkmap,
        getOptions,
        data
      }) => {
        return [getMarkmap, getOptions, data];
      }
    }
  }], context)];
  const html = template.replace('<!--CSS-->', () => cssList.join('')).replace('<!--JS-->', () => jsList.join(''));
  return html;
}

// List of valid entities
//
// Generate with ./support/entities.js script
//

/*eslint quotes:0*/
var entities = {
  "Aacute": "\xC1",
  "aacute": "\xE1",
  "Abreve": "\u0102",
  "abreve": "\u0103",
  "ac": "\u223E",
  "acd": "\u223F",
  "acE": "\u223E\u0333",
  "Acirc": "\xC2",
  "acirc": "\xE2",
  "acute": "\xB4",
  "Acy": "\u0410",
  "acy": "\u0430",
  "AElig": "\xC6",
  "aelig": "\xE6",
  "af": "\u2061",
  "Afr": "\uD835\uDD04",
  "afr": "\uD835\uDD1E",
  "Agrave": "\xC0",
  "agrave": "\xE0",
  "alefsym": "\u2135",
  "aleph": "\u2135",
  "Alpha": "\u0391",
  "alpha": "\u03B1",
  "Amacr": "\u0100",
  "amacr": "\u0101",
  "amalg": "\u2A3F",
  "AMP": "&",
  "amp": "&",
  "And": "\u2A53",
  "and": "\u2227",
  "andand": "\u2A55",
  "andd": "\u2A5C",
  "andslope": "\u2A58",
  "andv": "\u2A5A",
  "ang": "\u2220",
  "ange": "\u29A4",
  "angle": "\u2220",
  "angmsd": "\u2221",
  "angmsdaa": "\u29A8",
  "angmsdab": "\u29A9",
  "angmsdac": "\u29AA",
  "angmsdad": "\u29AB",
  "angmsdae": "\u29AC",
  "angmsdaf": "\u29AD",
  "angmsdag": "\u29AE",
  "angmsdah": "\u29AF",
  "angrt": "\u221F",
  "angrtvb": "\u22BE",
  "angrtvbd": "\u299D",
  "angsph": "\u2222",
  "angst": "\xC5",
  "angzarr": "\u237C",
  "Aogon": "\u0104",
  "aogon": "\u0105",
  "Aopf": "\uD835\uDD38",
  "aopf": "\uD835\uDD52",
  "ap": "\u2248",
  "apacir": "\u2A6F",
  "apE": "\u2A70",
  "ape": "\u224A",
  "apid": "\u224B",
  "apos": "'",
  "ApplyFunction": "\u2061",
  "approx": "\u2248",
  "approxeq": "\u224A",
  "Aring": "\xC5",
  "aring": "\xE5",
  "Ascr": "\uD835\uDC9C",
  "ascr": "\uD835\uDCB6",
  "Assign": "\u2254",
  "ast": "*",
  "asymp": "\u2248",
  "asympeq": "\u224D",
  "Atilde": "\xC3",
  "atilde": "\xE3",
  "Auml": "\xC4",
  "auml": "\xE4",
  "awconint": "\u2233",
  "awint": "\u2A11",
  "backcong": "\u224C",
  "backepsilon": "\u03F6",
  "backprime": "\u2035",
  "backsim": "\u223D",
  "backsimeq": "\u22CD",
  "Backslash": "\u2216",
  "Barv": "\u2AE7",
  "barvee": "\u22BD",
  "Barwed": "\u2306",
  "barwed": "\u2305",
  "barwedge": "\u2305",
  "bbrk": "\u23B5",
  "bbrktbrk": "\u23B6",
  "bcong": "\u224C",
  "Bcy": "\u0411",
  "bcy": "\u0431",
  "bdquo": "\u201E",
  "becaus": "\u2235",
  "Because": "\u2235",
  "because": "\u2235",
  "bemptyv": "\u29B0",
  "bepsi": "\u03F6",
  "bernou": "\u212C",
  "Bernoullis": "\u212C",
  "Beta": "\u0392",
  "beta": "\u03B2",
  "beth": "\u2136",
  "between": "\u226C",
  "Bfr": "\uD835\uDD05",
  "bfr": "\uD835\uDD1F",
  "bigcap": "\u22C2",
  "bigcirc": "\u25EF",
  "bigcup": "\u22C3",
  "bigodot": "\u2A00",
  "bigoplus": "\u2A01",
  "bigotimes": "\u2A02",
  "bigsqcup": "\u2A06",
  "bigstar": "\u2605",
  "bigtriangledown": "\u25BD",
  "bigtriangleup": "\u25B3",
  "biguplus": "\u2A04",
  "bigvee": "\u22C1",
  "bigwedge": "\u22C0",
  "bkarow": "\u290D",
  "blacklozenge": "\u29EB",
  "blacksquare": "\u25AA",
  "blacktriangle": "\u25B4",
  "blacktriangledown": "\u25BE",
  "blacktriangleleft": "\u25C2",
  "blacktriangleright": "\u25B8",
  "blank": "\u2423",
  "blk12": "\u2592",
  "blk14": "\u2591",
  "blk34": "\u2593",
  "block": "\u2588",
  "bne": "=\u20E5",
  "bnequiv": "\u2261\u20E5",
  "bNot": "\u2AED",
  "bnot": "\u2310",
  "Bopf": "\uD835\uDD39",
  "bopf": "\uD835\uDD53",
  "bot": "\u22A5",
  "bottom": "\u22A5",
  "bowtie": "\u22C8",
  "boxbox": "\u29C9",
  "boxDL": "\u2557",
  "boxDl": "\u2556",
  "boxdL": "\u2555",
  "boxdl": "\u2510",
  "boxDR": "\u2554",
  "boxDr": "\u2553",
  "boxdR": "\u2552",
  "boxdr": "\u250C",
  "boxH": "\u2550",
  "boxh": "\u2500",
  "boxHD": "\u2566",
  "boxHd": "\u2564",
  "boxhD": "\u2565",
  "boxhd": "\u252C",
  "boxHU": "\u2569",
  "boxHu": "\u2567",
  "boxhU": "\u2568",
  "boxhu": "\u2534",
  "boxminus": "\u229F",
  "boxplus": "\u229E",
  "boxtimes": "\u22A0",
  "boxUL": "\u255D",
  "boxUl": "\u255C",
  "boxuL": "\u255B",
  "boxul": "\u2518",
  "boxUR": "\u255A",
  "boxUr": "\u2559",
  "boxuR": "\u2558",
  "boxur": "\u2514",
  "boxV": "\u2551",
  "boxv": "\u2502",
  "boxVH": "\u256C",
  "boxVh": "\u256B",
  "boxvH": "\u256A",
  "boxvh": "\u253C",
  "boxVL": "\u2563",
  "boxVl": "\u2562",
  "boxvL": "\u2561",
  "boxvl": "\u2524",
  "boxVR": "\u2560",
  "boxVr": "\u255F",
  "boxvR": "\u255E",
  "boxvr": "\u251C",
  "bprime": "\u2035",
  "Breve": "\u02D8",
  "breve": "\u02D8",
  "brvbar": "\xA6",
  "Bscr": "\u212C",
  "bscr": "\uD835\uDCB7",
  "bsemi": "\u204F",
  "bsim": "\u223D",
  "bsime": "\u22CD",
  "bsol": "\\",
  "bsolb": "\u29C5",
  "bsolhsub": "\u27C8",
  "bull": "\u2022",
  "bullet": "\u2022",
  "bump": "\u224E",
  "bumpE": "\u2AAE",
  "bumpe": "\u224F",
  "Bumpeq": "\u224E",
  "bumpeq": "\u224F",
  "Cacute": "\u0106",
  "cacute": "\u0107",
  "Cap": "\u22D2",
  "cap": "\u2229",
  "capand": "\u2A44",
  "capbrcup": "\u2A49",
  "capcap": "\u2A4B",
  "capcup": "\u2A47",
  "capdot": "\u2A40",
  "CapitalDifferentialD": "\u2145",
  "caps": "\u2229\uFE00",
  "caret": "\u2041",
  "caron": "\u02C7",
  "Cayleys": "\u212D",
  "ccaps": "\u2A4D",
  "Ccaron": "\u010C",
  "ccaron": "\u010D",
  "Ccedil": "\xC7",
  "ccedil": "\xE7",
  "Ccirc": "\u0108",
  "ccirc": "\u0109",
  "Cconint": "\u2230",
  "ccups": "\u2A4C",
  "ccupssm": "\u2A50",
  "Cdot": "\u010A",
  "cdot": "\u010B",
  "cedil": "\xB8",
  "Cedilla": "\xB8",
  "cemptyv": "\u29B2",
  "cent": "\xA2",
  "CenterDot": "\xB7",
  "centerdot": "\xB7",
  "Cfr": "\u212D",
  "cfr": "\uD835\uDD20",
  "CHcy": "\u0427",
  "chcy": "\u0447",
  "check": "\u2713",
  "checkmark": "\u2713",
  "Chi": "\u03A7",
  "chi": "\u03C7",
  "cir": "\u25CB",
  "circ": "\u02C6",
  "circeq": "\u2257",
  "circlearrowleft": "\u21BA",
  "circlearrowright": "\u21BB",
  "circledast": "\u229B",
  "circledcirc": "\u229A",
  "circleddash": "\u229D",
  "CircleDot": "\u2299",
  "circledR": "\xAE",
  "circledS": "\u24C8",
  "CircleMinus": "\u2296",
  "CirclePlus": "\u2295",
  "CircleTimes": "\u2297",
  "cirE": "\u29C3",
  "cire": "\u2257",
  "cirfnint": "\u2A10",
  "cirmid": "\u2AEF",
  "cirscir": "\u29C2",
  "ClockwiseContourIntegral": "\u2232",
  "CloseCurlyDoubleQuote": "\u201D",
  "CloseCurlyQuote": "\u2019",
  "clubs": "\u2663",
  "clubsuit": "\u2663",
  "Colon": "\u2237",
  "colon": ":",
  "Colone": "\u2A74",
  "colone": "\u2254",
  "coloneq": "\u2254",
  "comma": ",",
  "commat": "@",
  "comp": "\u2201",
  "compfn": "\u2218",
  "complement": "\u2201",
  "complexes": "\u2102",
  "cong": "\u2245",
  "congdot": "\u2A6D",
  "Congruent": "\u2261",
  "Conint": "\u222F",
  "conint": "\u222E",
  "ContourIntegral": "\u222E",
  "Copf": "\u2102",
  "copf": "\uD835\uDD54",
  "coprod": "\u2210",
  "Coproduct": "\u2210",
  "COPY": "\xA9",
  "copy": "\xA9",
  "copysr": "\u2117",
  "CounterClockwiseContourIntegral": "\u2233",
  "crarr": "\u21B5",
  "Cross": "\u2A2F",
  "cross": "\u2717",
  "Cscr": "\uD835\uDC9E",
  "cscr": "\uD835\uDCB8",
  "csub": "\u2ACF",
  "csube": "\u2AD1",
  "csup": "\u2AD0",
  "csupe": "\u2AD2",
  "ctdot": "\u22EF",
  "cudarrl": "\u2938",
  "cudarrr": "\u2935",
  "cuepr": "\u22DE",
  "cuesc": "\u22DF",
  "cularr": "\u21B6",
  "cularrp": "\u293D",
  "Cup": "\u22D3",
  "cup": "\u222A",
  "cupbrcap": "\u2A48",
  "CupCap": "\u224D",
  "cupcap": "\u2A46",
  "cupcup": "\u2A4A",
  "cupdot": "\u228D",
  "cupor": "\u2A45",
  "cups": "\u222A\uFE00",
  "curarr": "\u21B7",
  "curarrm": "\u293C",
  "curlyeqprec": "\u22DE",
  "curlyeqsucc": "\u22DF",
  "curlyvee": "\u22CE",
  "curlywedge": "\u22CF",
  "curren": "\xA4",
  "curvearrowleft": "\u21B6",
  "curvearrowright": "\u21B7",
  "cuvee": "\u22CE",
  "cuwed": "\u22CF",
  "cwconint": "\u2232",
  "cwint": "\u2231",
  "cylcty": "\u232D",
  "Dagger": "\u2021",
  "dagger": "\u2020",
  "daleth": "\u2138",
  "Darr": "\u21A1",
  "dArr": "\u21D3",
  "darr": "\u2193",
  "dash": "\u2010",
  "Dashv": "\u2AE4",
  "dashv": "\u22A3",
  "dbkarow": "\u290F",
  "dblac": "\u02DD",
  "Dcaron": "\u010E",
  "dcaron": "\u010F",
  "Dcy": "\u0414",
  "dcy": "\u0434",
  "DD": "\u2145",
  "dd": "\u2146",
  "ddagger": "\u2021",
  "ddarr": "\u21CA",
  "DDotrahd": "\u2911",
  "ddotseq": "\u2A77",
  "deg": "\xB0",
  "Del": "\u2207",
  "Delta": "\u0394",
  "delta": "\u03B4",
  "demptyv": "\u29B1",
  "dfisht": "\u297F",
  "Dfr": "\uD835\uDD07",
  "dfr": "\uD835\uDD21",
  "dHar": "\u2965",
  "dharl": "\u21C3",
  "dharr": "\u21C2",
  "DiacriticalAcute": "\xB4",
  "DiacriticalDot": "\u02D9",
  "DiacriticalDoubleAcute": "\u02DD",
  "DiacriticalGrave": "`",
  "DiacriticalTilde": "\u02DC",
  "diam": "\u22C4",
  "Diamond": "\u22C4",
  "diamond": "\u22C4",
  "diamondsuit": "\u2666",
  "diams": "\u2666",
  "die": "\xA8",
  "DifferentialD": "\u2146",
  "digamma": "\u03DD",
  "disin": "\u22F2",
  "div": "\xF7",
  "divide": "\xF7",
  "divideontimes": "\u22C7",
  "divonx": "\u22C7",
  "DJcy": "\u0402",
  "djcy": "\u0452",
  "dlcorn": "\u231E",
  "dlcrop": "\u230D",
  "dollar": "$",
  "Dopf": "\uD835\uDD3B",
  "dopf": "\uD835\uDD55",
  "Dot": "\xA8",
  "dot": "\u02D9",
  "DotDot": "\u20DC",
  "doteq": "\u2250",
  "doteqdot": "\u2251",
  "DotEqual": "\u2250",
  "dotminus": "\u2238",
  "dotplus": "\u2214",
  "dotsquare": "\u22A1",
  "doublebarwedge": "\u2306",
  "DoubleContourIntegral": "\u222F",
  "DoubleDot": "\xA8",
  "DoubleDownArrow": "\u21D3",
  "DoubleLeftArrow": "\u21D0",
  "DoubleLeftRightArrow": "\u21D4",
  "DoubleLeftTee": "\u2AE4",
  "DoubleLongLeftArrow": "\u27F8",
  "DoubleLongLeftRightArrow": "\u27FA",
  "DoubleLongRightArrow": "\u27F9",
  "DoubleRightArrow": "\u21D2",
  "DoubleRightTee": "\u22A8",
  "DoubleUpArrow": "\u21D1",
  "DoubleUpDownArrow": "\u21D5",
  "DoubleVerticalBar": "\u2225",
  "DownArrow": "\u2193",
  "Downarrow": "\u21D3",
  "downarrow": "\u2193",
  "DownArrowBar": "\u2913",
  "DownArrowUpArrow": "\u21F5",
  "DownBreve": "\u0311",
  "downdownarrows": "\u21CA",
  "downharpoonleft": "\u21C3",
  "downharpoonright": "\u21C2",
  "DownLeftRightVector": "\u2950",
  "DownLeftTeeVector": "\u295E",
  "DownLeftVector": "\u21BD",
  "DownLeftVectorBar": "\u2956",
  "DownRightTeeVector": "\u295F",
  "DownRightVector": "\u21C1",
  "DownRightVectorBar": "\u2957",
  "DownTee": "\u22A4",
  "DownTeeArrow": "\u21A7",
  "drbkarow": "\u2910",
  "drcorn": "\u231F",
  "drcrop": "\u230C",
  "Dscr": "\uD835\uDC9F",
  "dscr": "\uD835\uDCB9",
  "DScy": "\u0405",
  "dscy": "\u0455",
  "dsol": "\u29F6",
  "Dstrok": "\u0110",
  "dstrok": "\u0111",
  "dtdot": "\u22F1",
  "dtri": "\u25BF",
  "dtrif": "\u25BE",
  "duarr": "\u21F5",
  "duhar": "\u296F",
  "dwangle": "\u29A6",
  "DZcy": "\u040F",
  "dzcy": "\u045F",
  "dzigrarr": "\u27FF",
  "Eacute": "\xC9",
  "eacute": "\xE9",
  "easter": "\u2A6E",
  "Ecaron": "\u011A",
  "ecaron": "\u011B",
  "ecir": "\u2256",
  "Ecirc": "\xCA",
  "ecirc": "\xEA",
  "ecolon": "\u2255",
  "Ecy": "\u042D",
  "ecy": "\u044D",
  "eDDot": "\u2A77",
  "Edot": "\u0116",
  "eDot": "\u2251",
  "edot": "\u0117",
  "ee": "\u2147",
  "efDot": "\u2252",
  "Efr": "\uD835\uDD08",
  "efr": "\uD835\uDD22",
  "eg": "\u2A9A",
  "Egrave": "\xC8",
  "egrave": "\xE8",
  "egs": "\u2A96",
  "egsdot": "\u2A98",
  "el": "\u2A99",
  "Element": "\u2208",
  "elinters": "\u23E7",
  "ell": "\u2113",
  "els": "\u2A95",
  "elsdot": "\u2A97",
  "Emacr": "\u0112",
  "emacr": "\u0113",
  "empty": "\u2205",
  "emptyset": "\u2205",
  "EmptySmallSquare": "\u25FB",
  "emptyv": "\u2205",
  "EmptyVerySmallSquare": "\u25AB",
  "emsp": "\u2003",
  "emsp13": "\u2004",
  "emsp14": "\u2005",
  "ENG": "\u014A",
  "eng": "\u014B",
  "ensp": "\u2002",
  "Eogon": "\u0118",
  "eogon": "\u0119",
  "Eopf": "\uD835\uDD3C",
  "eopf": "\uD835\uDD56",
  "epar": "\u22D5",
  "eparsl": "\u29E3",
  "eplus": "\u2A71",
  "epsi": "\u03B5",
  "Epsilon": "\u0395",
  "epsilon": "\u03B5",
  "epsiv": "\u03F5",
  "eqcirc": "\u2256",
  "eqcolon": "\u2255",
  "eqsim": "\u2242",
  "eqslantgtr": "\u2A96",
  "eqslantless": "\u2A95",
  "Equal": "\u2A75",
  "equals": "=",
  "EqualTilde": "\u2242",
  "equest": "\u225F",
  "Equilibrium": "\u21CC",
  "equiv": "\u2261",
  "equivDD": "\u2A78",
  "eqvparsl": "\u29E5",
  "erarr": "\u2971",
  "erDot": "\u2253",
  "Escr": "\u2130",
  "escr": "\u212F",
  "esdot": "\u2250",
  "Esim": "\u2A73",
  "esim": "\u2242",
  "Eta": "\u0397",
  "eta": "\u03B7",
  "ETH": "\xD0",
  "eth": "\xF0",
  "Euml": "\xCB",
  "euml": "\xEB",
  "euro": "\u20AC",
  "excl": "!",
  "exist": "\u2203",
  "Exists": "\u2203",
  "expectation": "\u2130",
  "ExponentialE": "\u2147",
  "exponentiale": "\u2147",
  "fallingdotseq": "\u2252",
  "Fcy": "\u0424",
  "fcy": "\u0444",
  "female": "\u2640",
  "ffilig": "\uFB03",
  "fflig": "\uFB00",
  "ffllig": "\uFB04",
  "Ffr": "\uD835\uDD09",
  "ffr": "\uD835\uDD23",
  "filig": "\uFB01",
  "FilledSmallSquare": "\u25FC",
  "FilledVerySmallSquare": "\u25AA",
  "fjlig": "fj",
  "flat": "\u266D",
  "fllig": "\uFB02",
  "fltns": "\u25B1",
  "fnof": "\u0192",
  "Fopf": "\uD835\uDD3D",
  "fopf": "\uD835\uDD57",
  "ForAll": "\u2200",
  "forall": "\u2200",
  "fork": "\u22D4",
  "forkv": "\u2AD9",
  "Fouriertrf": "\u2131",
  "fpartint": "\u2A0D",
  "frac12": "\xBD",
  "frac13": "\u2153",
  "frac14": "\xBC",
  "frac15": "\u2155",
  "frac16": "\u2159",
  "frac18": "\u215B",
  "frac23": "\u2154",
  "frac25": "\u2156",
  "frac34": "\xBE",
  "frac35": "\u2157",
  "frac38": "\u215C",
  "frac45": "\u2158",
  "frac56": "\u215A",
  "frac58": "\u215D",
  "frac78": "\u215E",
  "frasl": "\u2044",
  "frown": "\u2322",
  "Fscr": "\u2131",
  "fscr": "\uD835\uDCBB",
  "gacute": "\u01F5",
  "Gamma": "\u0393",
  "gamma": "\u03B3",
  "Gammad": "\u03DC",
  "gammad": "\u03DD",
  "gap": "\u2A86",
  "Gbreve": "\u011E",
  "gbreve": "\u011F",
  "Gcedil": "\u0122",
  "Gcirc": "\u011C",
  "gcirc": "\u011D",
  "Gcy": "\u0413",
  "gcy": "\u0433",
  "Gdot": "\u0120",
  "gdot": "\u0121",
  "gE": "\u2267",
  "ge": "\u2265",
  "gEl": "\u2A8C",
  "gel": "\u22DB",
  "geq": "\u2265",
  "geqq": "\u2267",
  "geqslant": "\u2A7E",
  "ges": "\u2A7E",
  "gescc": "\u2AA9",
  "gesdot": "\u2A80",
  "gesdoto": "\u2A82",
  "gesdotol": "\u2A84",
  "gesl": "\u22DB\uFE00",
  "gesles": "\u2A94",
  "Gfr": "\uD835\uDD0A",
  "gfr": "\uD835\uDD24",
  "Gg": "\u22D9",
  "gg": "\u226B",
  "ggg": "\u22D9",
  "gimel": "\u2137",
  "GJcy": "\u0403",
  "gjcy": "\u0453",
  "gl": "\u2277",
  "gla": "\u2AA5",
  "glE": "\u2A92",
  "glj": "\u2AA4",
  "gnap": "\u2A8A",
  "gnapprox": "\u2A8A",
  "gnE": "\u2269",
  "gne": "\u2A88",
  "gneq": "\u2A88",
  "gneqq": "\u2269",
  "gnsim": "\u22E7",
  "Gopf": "\uD835\uDD3E",
  "gopf": "\uD835\uDD58",
  "grave": "`",
  "GreaterEqual": "\u2265",
  "GreaterEqualLess": "\u22DB",
  "GreaterFullEqual": "\u2267",
  "GreaterGreater": "\u2AA2",
  "GreaterLess": "\u2277",
  "GreaterSlantEqual": "\u2A7E",
  "GreaterTilde": "\u2273",
  "Gscr": "\uD835\uDCA2",
  "gscr": "\u210A",
  "gsim": "\u2273",
  "gsime": "\u2A8E",
  "gsiml": "\u2A90",
  "GT": ">",
  "Gt": "\u226B",
  "gt": ">",
  "gtcc": "\u2AA7",
  "gtcir": "\u2A7A",
  "gtdot": "\u22D7",
  "gtlPar": "\u2995",
  "gtquest": "\u2A7C",
  "gtrapprox": "\u2A86",
  "gtrarr": "\u2978",
  "gtrdot": "\u22D7",
  "gtreqless": "\u22DB",
  "gtreqqless": "\u2A8C",
  "gtrless": "\u2277",
  "gtrsim": "\u2273",
  "gvertneqq": "\u2269\uFE00",
  "gvnE": "\u2269\uFE00",
  "Hacek": "\u02C7",
  "hairsp": "\u200A",
  "half": "\xBD",
  "hamilt": "\u210B",
  "HARDcy": "\u042A",
  "hardcy": "\u044A",
  "hArr": "\u21D4",
  "harr": "\u2194",
  "harrcir": "\u2948",
  "harrw": "\u21AD",
  "Hat": "^",
  "hbar": "\u210F",
  "Hcirc": "\u0124",
  "hcirc": "\u0125",
  "hearts": "\u2665",
  "heartsuit": "\u2665",
  "hellip": "\u2026",
  "hercon": "\u22B9",
  "Hfr": "\u210C",
  "hfr": "\uD835\uDD25",
  "HilbertSpace": "\u210B",
  "hksearow": "\u2925",
  "hkswarow": "\u2926",
  "hoarr": "\u21FF",
  "homtht": "\u223B",
  "hookleftarrow": "\u21A9",
  "hookrightarrow": "\u21AA",
  "Hopf": "\u210D",
  "hopf": "\uD835\uDD59",
  "horbar": "\u2015",
  "HorizontalLine": "\u2500",
  "Hscr": "\u210B",
  "hscr": "\uD835\uDCBD",
  "hslash": "\u210F",
  "Hstrok": "\u0126",
  "hstrok": "\u0127",
  "HumpDownHump": "\u224E",
  "HumpEqual": "\u224F",
  "hybull": "\u2043",
  "hyphen": "\u2010",
  "Iacute": "\xCD",
  "iacute": "\xED",
  "ic": "\u2063",
  "Icirc": "\xCE",
  "icirc": "\xEE",
  "Icy": "\u0418",
  "icy": "\u0438",
  "Idot": "\u0130",
  "IEcy": "\u0415",
  "iecy": "\u0435",
  "iexcl": "\xA1",
  "iff": "\u21D4",
  "Ifr": "\u2111",
  "ifr": "\uD835\uDD26",
  "Igrave": "\xCC",
  "igrave": "\xEC",
  "ii": "\u2148",
  "iiiint": "\u2A0C",
  "iiint": "\u222D",
  "iinfin": "\u29DC",
  "iiota": "\u2129",
  "IJlig": "\u0132",
  "ijlig": "\u0133",
  "Im": "\u2111",
  "Imacr": "\u012A",
  "imacr": "\u012B",
  "image": "\u2111",
  "ImaginaryI": "\u2148",
  "imagline": "\u2110",
  "imagpart": "\u2111",
  "imath": "\u0131",
  "imof": "\u22B7",
  "imped": "\u01B5",
  "Implies": "\u21D2",
  "in": "\u2208",
  "incare": "\u2105",
  "infin": "\u221E",
  "infintie": "\u29DD",
  "inodot": "\u0131",
  "Int": "\u222C",
  "int": "\u222B",
  "intcal": "\u22BA",
  "integers": "\u2124",
  "Integral": "\u222B",
  "intercal": "\u22BA",
  "Intersection": "\u22C2",
  "intlarhk": "\u2A17",
  "intprod": "\u2A3C",
  "InvisibleComma": "\u2063",
  "InvisibleTimes": "\u2062",
  "IOcy": "\u0401",
  "iocy": "\u0451",
  "Iogon": "\u012E",
  "iogon": "\u012F",
  "Iopf": "\uD835\uDD40",
  "iopf": "\uD835\uDD5A",
  "Iota": "\u0399",
  "iota": "\u03B9",
  "iprod": "\u2A3C",
  "iquest": "\xBF",
  "Iscr": "\u2110",
  "iscr": "\uD835\uDCBE",
  "isin": "\u2208",
  "isindot": "\u22F5",
  "isinE": "\u22F9",
  "isins": "\u22F4",
  "isinsv": "\u22F3",
  "isinv": "\u2208",
  "it": "\u2062",
  "Itilde": "\u0128",
  "itilde": "\u0129",
  "Iukcy": "\u0406",
  "iukcy": "\u0456",
  "Iuml": "\xCF",
  "iuml": "\xEF",
  "Jcirc": "\u0134",
  "jcirc": "\u0135",
  "Jcy": "\u0419",
  "jcy": "\u0439",
  "Jfr": "\uD835\uDD0D",
  "jfr": "\uD835\uDD27",
  "jmath": "\u0237",
  "Jopf": "\uD835\uDD41",
  "jopf": "\uD835\uDD5B",
  "Jscr": "\uD835\uDCA5",
  "jscr": "\uD835\uDCBF",
  "Jsercy": "\u0408",
  "jsercy": "\u0458",
  "Jukcy": "\u0404",
  "jukcy": "\u0454",
  "Kappa": "\u039A",
  "kappa": "\u03BA",
  "kappav": "\u03F0",
  "Kcedil": "\u0136",
  "kcedil": "\u0137",
  "Kcy": "\u041A",
  "kcy": "\u043A",
  "Kfr": "\uD835\uDD0E",
  "kfr": "\uD835\uDD28",
  "kgreen": "\u0138",
  "KHcy": "\u0425",
  "khcy": "\u0445",
  "KJcy": "\u040C",
  "kjcy": "\u045C",
  "Kopf": "\uD835\uDD42",
  "kopf": "\uD835\uDD5C",
  "Kscr": "\uD835\uDCA6",
  "kscr": "\uD835\uDCC0",
  "lAarr": "\u21DA",
  "Lacute": "\u0139",
  "lacute": "\u013A",
  "laemptyv": "\u29B4",
  "lagran": "\u2112",
  "Lambda": "\u039B",
  "lambda": "\u03BB",
  "Lang": "\u27EA",
  "lang": "\u27E8",
  "langd": "\u2991",
  "langle": "\u27E8",
  "lap": "\u2A85",
  "Laplacetrf": "\u2112",
  "laquo": "\xAB",
  "Larr": "\u219E",
  "lArr": "\u21D0",
  "larr": "\u2190",
  "larrb": "\u21E4",
  "larrbfs": "\u291F",
  "larrfs": "\u291D",
  "larrhk": "\u21A9",
  "larrlp": "\u21AB",
  "larrpl": "\u2939",
  "larrsim": "\u2973",
  "larrtl": "\u21A2",
  "lat": "\u2AAB",
  "lAtail": "\u291B",
  "latail": "\u2919",
  "late": "\u2AAD",
  "lates": "\u2AAD\uFE00",
  "lBarr": "\u290E",
  "lbarr": "\u290C",
  "lbbrk": "\u2772",
  "lbrace": "{",
  "lbrack": "[",
  "lbrke": "\u298B",
  "lbrksld": "\u298F",
  "lbrkslu": "\u298D",
  "Lcaron": "\u013D",
  "lcaron": "\u013E",
  "Lcedil": "\u013B",
  "lcedil": "\u013C",
  "lceil": "\u2308",
  "lcub": "{",
  "Lcy": "\u041B",
  "lcy": "\u043B",
  "ldca": "\u2936",
  "ldquo": "\u201C",
  "ldquor": "\u201E",
  "ldrdhar": "\u2967",
  "ldrushar": "\u294B",
  "ldsh": "\u21B2",
  "lE": "\u2266",
  "le": "\u2264",
  "LeftAngleBracket": "\u27E8",
  "LeftArrow": "\u2190",
  "Leftarrow": "\u21D0",
  "leftarrow": "\u2190",
  "LeftArrowBar": "\u21E4",
  "LeftArrowRightArrow": "\u21C6",
  "leftarrowtail": "\u21A2",
  "LeftCeiling": "\u2308",
  "LeftDoubleBracket": "\u27E6",
  "LeftDownTeeVector": "\u2961",
  "LeftDownVector": "\u21C3",
  "LeftDownVectorBar": "\u2959",
  "LeftFloor": "\u230A",
  "leftharpoondown": "\u21BD",
  "leftharpoonup": "\u21BC",
  "leftleftarrows": "\u21C7",
  "LeftRightArrow": "\u2194",
  "Leftrightarrow": "\u21D4",
  "leftrightarrow": "\u2194",
  "leftrightarrows": "\u21C6",
  "leftrightharpoons": "\u21CB",
  "leftrightsquigarrow": "\u21AD",
  "LeftRightVector": "\u294E",
  "LeftTee": "\u22A3",
  "LeftTeeArrow": "\u21A4",
  "LeftTeeVector": "\u295A",
  "leftthreetimes": "\u22CB",
  "LeftTriangle": "\u22B2",
  "LeftTriangleBar": "\u29CF",
  "LeftTriangleEqual": "\u22B4",
  "LeftUpDownVector": "\u2951",
  "LeftUpTeeVector": "\u2960",
  "LeftUpVector": "\u21BF",
  "LeftUpVectorBar": "\u2958",
  "LeftVector": "\u21BC",
  "LeftVectorBar": "\u2952",
  "lEg": "\u2A8B",
  "leg": "\u22DA",
  "leq": "\u2264",
  "leqq": "\u2266",
  "leqslant": "\u2A7D",
  "les": "\u2A7D",
  "lescc": "\u2AA8",
  "lesdot": "\u2A7F",
  "lesdoto": "\u2A81",
  "lesdotor": "\u2A83",
  "lesg": "\u22DA\uFE00",
  "lesges": "\u2A93",
  "lessapprox": "\u2A85",
  "lessdot": "\u22D6",
  "lesseqgtr": "\u22DA",
  "lesseqqgtr": "\u2A8B",
  "LessEqualGreater": "\u22DA",
  "LessFullEqual": "\u2266",
  "LessGreater": "\u2276",
  "lessgtr": "\u2276",
  "LessLess": "\u2AA1",
  "lesssim": "\u2272",
  "LessSlantEqual": "\u2A7D",
  "LessTilde": "\u2272",
  "lfisht": "\u297C",
  "lfloor": "\u230A",
  "Lfr": "\uD835\uDD0F",
  "lfr": "\uD835\uDD29",
  "lg": "\u2276",
  "lgE": "\u2A91",
  "lHar": "\u2962",
  "lhard": "\u21BD",
  "lharu": "\u21BC",
  "lharul": "\u296A",
  "lhblk": "\u2584",
  "LJcy": "\u0409",
  "ljcy": "\u0459",
  "Ll": "\u22D8",
  "ll": "\u226A",
  "llarr": "\u21C7",
  "llcorner": "\u231E",
  "Lleftarrow": "\u21DA",
  "llhard": "\u296B",
  "lltri": "\u25FA",
  "Lmidot": "\u013F",
  "lmidot": "\u0140",
  "lmoust": "\u23B0",
  "lmoustache": "\u23B0",
  "lnap": "\u2A89",
  "lnapprox": "\u2A89",
  "lnE": "\u2268",
  "lne": "\u2A87",
  "lneq": "\u2A87",
  "lneqq": "\u2268",
  "lnsim": "\u22E6",
  "loang": "\u27EC",
  "loarr": "\u21FD",
  "lobrk": "\u27E6",
  "LongLeftArrow": "\u27F5",
  "Longleftarrow": "\u27F8",
  "longleftarrow": "\u27F5",
  "LongLeftRightArrow": "\u27F7",
  "Longleftrightarrow": "\u27FA",
  "longleftrightarrow": "\u27F7",
  "longmapsto": "\u27FC",
  "LongRightArrow": "\u27F6",
  "Longrightarrow": "\u27F9",
  "longrightarrow": "\u27F6",
  "looparrowleft": "\u21AB",
  "looparrowright": "\u21AC",
  "lopar": "\u2985",
  "Lopf": "\uD835\uDD43",
  "lopf": "\uD835\uDD5D",
  "loplus": "\u2A2D",
  "lotimes": "\u2A34",
  "lowast": "\u2217",
  "lowbar": "_",
  "LowerLeftArrow": "\u2199",
  "LowerRightArrow": "\u2198",
  "loz": "\u25CA",
  "lozenge": "\u25CA",
  "lozf": "\u29EB",
  "lpar": "(",
  "lparlt": "\u2993",
  "lrarr": "\u21C6",
  "lrcorner": "\u231F",
  "lrhar": "\u21CB",
  "lrhard": "\u296D",
  "lrm": "\u200E",
  "lrtri": "\u22BF",
  "lsaquo": "\u2039",
  "Lscr": "\u2112",
  "lscr": "\uD835\uDCC1",
  "Lsh": "\u21B0",
  "lsh": "\u21B0",
  "lsim": "\u2272",
  "lsime": "\u2A8D",
  "lsimg": "\u2A8F",
  "lsqb": "[",
  "lsquo": "\u2018",
  "lsquor": "\u201A",
  "Lstrok": "\u0141",
  "lstrok": "\u0142",
  "LT": "<",
  "Lt": "\u226A",
  "lt": "<",
  "ltcc": "\u2AA6",
  "ltcir": "\u2A79",
  "ltdot": "\u22D6",
  "lthree": "\u22CB",
  "ltimes": "\u22C9",
  "ltlarr": "\u2976",
  "ltquest": "\u2A7B",
  "ltri": "\u25C3",
  "ltrie": "\u22B4",
  "ltrif": "\u25C2",
  "ltrPar": "\u2996",
  "lurdshar": "\u294A",
  "luruhar": "\u2966",
  "lvertneqq": "\u2268\uFE00",
  "lvnE": "\u2268\uFE00",
  "macr": "\xAF",
  "male": "\u2642",
  "malt": "\u2720",
  "maltese": "\u2720",
  "Map": "\u2905",
  "map": "\u21A6",
  "mapsto": "\u21A6",
  "mapstodown": "\u21A7",
  "mapstoleft": "\u21A4",
  "mapstoup": "\u21A5",
  "marker": "\u25AE",
  "mcomma": "\u2A29",
  "Mcy": "\u041C",
  "mcy": "\u043C",
  "mdash": "\u2014",
  "mDDot": "\u223A",
  "measuredangle": "\u2221",
  "MediumSpace": "\u205F",
  "Mellintrf": "\u2133",
  "Mfr": "\uD835\uDD10",
  "mfr": "\uD835\uDD2A",
  "mho": "\u2127",
  "micro": "\xB5",
  "mid": "\u2223",
  "midast": "*",
  "midcir": "\u2AF0",
  "middot": "\xB7",
  "minus": "\u2212",
  "minusb": "\u229F",
  "minusd": "\u2238",
  "minusdu": "\u2A2A",
  "MinusPlus": "\u2213",
  "mlcp": "\u2ADB",
  "mldr": "\u2026",
  "mnplus": "\u2213",
  "models": "\u22A7",
  "Mopf": "\uD835\uDD44",
  "mopf": "\uD835\uDD5E",
  "mp": "\u2213",
  "Mscr": "\u2133",
  "mscr": "\uD835\uDCC2",
  "mstpos": "\u223E",
  "Mu": "\u039C",
  "mu": "\u03BC",
  "multimap": "\u22B8",
  "mumap": "\u22B8",
  "nabla": "\u2207",
  "Nacute": "\u0143",
  "nacute": "\u0144",
  "nang": "\u2220\u20D2",
  "nap": "\u2249",
  "napE": "\u2A70\u0338",
  "napid": "\u224B\u0338",
  "napos": "\u0149",
  "napprox": "\u2249",
  "natur": "\u266E",
  "natural": "\u266E",
  "naturals": "\u2115",
  "nbsp": "\xA0",
  "nbump": "\u224E\u0338",
  "nbumpe": "\u224F\u0338",
  "ncap": "\u2A43",
  "Ncaron": "\u0147",
  "ncaron": "\u0148",
  "Ncedil": "\u0145",
  "ncedil": "\u0146",
  "ncong": "\u2247",
  "ncongdot": "\u2A6D\u0338",
  "ncup": "\u2A42",
  "Ncy": "\u041D",
  "ncy": "\u043D",
  "ndash": "\u2013",
  "ne": "\u2260",
  "nearhk": "\u2924",
  "neArr": "\u21D7",
  "nearr": "\u2197",
  "nearrow": "\u2197",
  "nedot": "\u2250\u0338",
  "NegativeMediumSpace": "\u200B",
  "NegativeThickSpace": "\u200B",
  "NegativeThinSpace": "\u200B",
  "NegativeVeryThinSpace": "\u200B",
  "nequiv": "\u2262",
  "nesear": "\u2928",
  "nesim": "\u2242\u0338",
  "NestedGreaterGreater": "\u226B",
  "NestedLessLess": "\u226A",
  "NewLine": "\n",
  "nexist": "\u2204",
  "nexists": "\u2204",
  "Nfr": "\uD835\uDD11",
  "nfr": "\uD835\uDD2B",
  "ngE": "\u2267\u0338",
  "nge": "\u2271",
  "ngeq": "\u2271",
  "ngeqq": "\u2267\u0338",
  "ngeqslant": "\u2A7E\u0338",
  "nges": "\u2A7E\u0338",
  "nGg": "\u22D9\u0338",
  "ngsim": "\u2275",
  "nGt": "\u226B\u20D2",
  "ngt": "\u226F",
  "ngtr": "\u226F",
  "nGtv": "\u226B\u0338",
  "nhArr": "\u21CE",
  "nharr": "\u21AE",
  "nhpar": "\u2AF2",
  "ni": "\u220B",
  "nis": "\u22FC",
  "nisd": "\u22FA",
  "niv": "\u220B",
  "NJcy": "\u040A",
  "njcy": "\u045A",
  "nlArr": "\u21CD",
  "nlarr": "\u219A",
  "nldr": "\u2025",
  "nlE": "\u2266\u0338",
  "nle": "\u2270",
  "nLeftarrow": "\u21CD",
  "nleftarrow": "\u219A",
  "nLeftrightarrow": "\u21CE",
  "nleftrightarrow": "\u21AE",
  "nleq": "\u2270",
  "nleqq": "\u2266\u0338",
  "nleqslant": "\u2A7D\u0338",
  "nles": "\u2A7D\u0338",
  "nless": "\u226E",
  "nLl": "\u22D8\u0338",
  "nlsim": "\u2274",
  "nLt": "\u226A\u20D2",
  "nlt": "\u226E",
  "nltri": "\u22EA",
  "nltrie": "\u22EC",
  "nLtv": "\u226A\u0338",
  "nmid": "\u2224",
  "NoBreak": "\u2060",
  "NonBreakingSpace": "\xA0",
  "Nopf": "\u2115",
  "nopf": "\uD835\uDD5F",
  "Not": "\u2AEC",
  "not": "\xAC",
  "NotCongruent": "\u2262",
  "NotCupCap": "\u226D",
  "NotDoubleVerticalBar": "\u2226",
  "NotElement": "\u2209",
  "NotEqual": "\u2260",
  "NotEqualTilde": "\u2242\u0338",
  "NotExists": "\u2204",
  "NotGreater": "\u226F",
  "NotGreaterEqual": "\u2271",
  "NotGreaterFullEqual": "\u2267\u0338",
  "NotGreaterGreater": "\u226B\u0338",
  "NotGreaterLess": "\u2279",
  "NotGreaterSlantEqual": "\u2A7E\u0338",
  "NotGreaterTilde": "\u2275",
  "NotHumpDownHump": "\u224E\u0338",
  "NotHumpEqual": "\u224F\u0338",
  "notin": "\u2209",
  "notindot": "\u22F5\u0338",
  "notinE": "\u22F9\u0338",
  "notinva": "\u2209",
  "notinvb": "\u22F7",
  "notinvc": "\u22F6",
  "NotLeftTriangle": "\u22EA",
  "NotLeftTriangleBar": "\u29CF\u0338",
  "NotLeftTriangleEqual": "\u22EC",
  "NotLess": "\u226E",
  "NotLessEqual": "\u2270",
  "NotLessGreater": "\u2278",
  "NotLessLess": "\u226A\u0338",
  "NotLessSlantEqual": "\u2A7D\u0338",
  "NotLessTilde": "\u2274",
  "NotNestedGreaterGreater": "\u2AA2\u0338",
  "NotNestedLessLess": "\u2AA1\u0338",
  "notni": "\u220C",
  "notniva": "\u220C",
  "notnivb": "\u22FE",
  "notnivc": "\u22FD",
  "NotPrecedes": "\u2280",
  "NotPrecedesEqual": "\u2AAF\u0338",
  "NotPrecedesSlantEqual": "\u22E0",
  "NotReverseElement": "\u220C",
  "NotRightTriangle": "\u22EB",
  "NotRightTriangleBar": "\u29D0\u0338",
  "NotRightTriangleEqual": "\u22ED",
  "NotSquareSubset": "\u228F\u0338",
  "NotSquareSubsetEqual": "\u22E2",
  "NotSquareSuperset": "\u2290\u0338",
  "NotSquareSupersetEqual": "\u22E3",
  "NotSubset": "\u2282\u20D2",
  "NotSubsetEqual": "\u2288",
  "NotSucceeds": "\u2281",
  "NotSucceedsEqual": "\u2AB0\u0338",
  "NotSucceedsSlantEqual": "\u22E1",
  "NotSucceedsTilde": "\u227F\u0338",
  "NotSuperset": "\u2283\u20D2",
  "NotSupersetEqual": "\u2289",
  "NotTilde": "\u2241",
  "NotTildeEqual": "\u2244",
  "NotTildeFullEqual": "\u2247",
  "NotTildeTilde": "\u2249",
  "NotVerticalBar": "\u2224",
  "npar": "\u2226",
  "nparallel": "\u2226",
  "nparsl": "\u2AFD\u20E5",
  "npart": "\u2202\u0338",
  "npolint": "\u2A14",
  "npr": "\u2280",
  "nprcue": "\u22E0",
  "npre": "\u2AAF\u0338",
  "nprec": "\u2280",
  "npreceq": "\u2AAF\u0338",
  "nrArr": "\u21CF",
  "nrarr": "\u219B",
  "nrarrc": "\u2933\u0338",
  "nrarrw": "\u219D\u0338",
  "nRightarrow": "\u21CF",
  "nrightarrow": "\u219B",
  "nrtri": "\u22EB",
  "nrtrie": "\u22ED",
  "nsc": "\u2281",
  "nsccue": "\u22E1",
  "nsce": "\u2AB0\u0338",
  "Nscr": "\uD835\uDCA9",
  "nscr": "\uD835\uDCC3",
  "nshortmid": "\u2224",
  "nshortparallel": "\u2226",
  "nsim": "\u2241",
  "nsime": "\u2244",
  "nsimeq": "\u2244",
  "nsmid": "\u2224",
  "nspar": "\u2226",
  "nsqsube": "\u22E2",
  "nsqsupe": "\u22E3",
  "nsub": "\u2284",
  "nsubE": "\u2AC5\u0338",
  "nsube": "\u2288",
  "nsubset": "\u2282\u20D2",
  "nsubseteq": "\u2288",
  "nsubseteqq": "\u2AC5\u0338",
  "nsucc": "\u2281",
  "nsucceq": "\u2AB0\u0338",
  "nsup": "\u2285",
  "nsupE": "\u2AC6\u0338",
  "nsupe": "\u2289",
  "nsupset": "\u2283\u20D2",
  "nsupseteq": "\u2289",
  "nsupseteqq": "\u2AC6\u0338",
  "ntgl": "\u2279",
  "Ntilde": "\xD1",
  "ntilde": "\xF1",
  "ntlg": "\u2278",
  "ntriangleleft": "\u22EA",
  "ntrianglelefteq": "\u22EC",
  "ntriangleright": "\u22EB",
  "ntrianglerighteq": "\u22ED",
  "Nu": "\u039D",
  "nu": "\u03BD",
  "num": "#",
  "numero": "\u2116",
  "numsp": "\u2007",
  "nvap": "\u224D\u20D2",
  "nVDash": "\u22AF",
  "nVdash": "\u22AE",
  "nvDash": "\u22AD",
  "nvdash": "\u22AC",
  "nvge": "\u2265\u20D2",
  "nvgt": ">\u20D2",
  "nvHarr": "\u2904",
  "nvinfin": "\u29DE",
  "nvlArr": "\u2902",
  "nvle": "\u2264\u20D2",
  "nvlt": "<\u20D2",
  "nvltrie": "\u22B4\u20D2",
  "nvrArr": "\u2903",
  "nvrtrie": "\u22B5\u20D2",
  "nvsim": "\u223C\u20D2",
  "nwarhk": "\u2923",
  "nwArr": "\u21D6",
  "nwarr": "\u2196",
  "nwarrow": "\u2196",
  "nwnear": "\u2927",
  "Oacute": "\xD3",
  "oacute": "\xF3",
  "oast": "\u229B",
  "ocir": "\u229A",
  "Ocirc": "\xD4",
  "ocirc": "\xF4",
  "Ocy": "\u041E",
  "ocy": "\u043E",
  "odash": "\u229D",
  "Odblac": "\u0150",
  "odblac": "\u0151",
  "odiv": "\u2A38",
  "odot": "\u2299",
  "odsold": "\u29BC",
  "OElig": "\u0152",
  "oelig": "\u0153",
  "ofcir": "\u29BF",
  "Ofr": "\uD835\uDD12",
  "ofr": "\uD835\uDD2C",
  "ogon": "\u02DB",
  "Ograve": "\xD2",
  "ograve": "\xF2",
  "ogt": "\u29C1",
  "ohbar": "\u29B5",
  "ohm": "\u03A9",
  "oint": "\u222E",
  "olarr": "\u21BA",
  "olcir": "\u29BE",
  "olcross": "\u29BB",
  "oline": "\u203E",
  "olt": "\u29C0",
  "Omacr": "\u014C",
  "omacr": "\u014D",
  "Omega": "\u03A9",
  "omega": "\u03C9",
  "Omicron": "\u039F",
  "omicron": "\u03BF",
  "omid": "\u29B6",
  "ominus": "\u2296",
  "Oopf": "\uD835\uDD46",
  "oopf": "\uD835\uDD60",
  "opar": "\u29B7",
  "OpenCurlyDoubleQuote": "\u201C",
  "OpenCurlyQuote": "\u2018",
  "operp": "\u29B9",
  "oplus": "\u2295",
  "Or": "\u2A54",
  "or": "\u2228",
  "orarr": "\u21BB",
  "ord": "\u2A5D",
  "order": "\u2134",
  "orderof": "\u2134",
  "ordf": "\xAA",
  "ordm": "\xBA",
  "origof": "\u22B6",
  "oror": "\u2A56",
  "orslope": "\u2A57",
  "orv": "\u2A5B",
  "oS": "\u24C8",
  "Oscr": "\uD835\uDCAA",
  "oscr": "\u2134",
  "Oslash": "\xD8",
  "oslash": "\xF8",
  "osol": "\u2298",
  "Otilde": "\xD5",
  "otilde": "\xF5",
  "Otimes": "\u2A37",
  "otimes": "\u2297",
  "otimesas": "\u2A36",
  "Ouml": "\xD6",
  "ouml": "\xF6",
  "ovbar": "\u233D",
  "OverBar": "\u203E",
  "OverBrace": "\u23DE",
  "OverBracket": "\u23B4",
  "OverParenthesis": "\u23DC",
  "par": "\u2225",
  "para": "\xB6",
  "parallel": "\u2225",
  "parsim": "\u2AF3",
  "parsl": "\u2AFD",
  "part": "\u2202",
  "PartialD": "\u2202",
  "Pcy": "\u041F",
  "pcy": "\u043F",
  "percnt": "%",
  "period": ".",
  "permil": "\u2030",
  "perp": "\u22A5",
  "pertenk": "\u2031",
  "Pfr": "\uD835\uDD13",
  "pfr": "\uD835\uDD2D",
  "Phi": "\u03A6",
  "phi": "\u03C6",
  "phiv": "\u03D5",
  "phmmat": "\u2133",
  "phone": "\u260E",
  "Pi": "\u03A0",
  "pi": "\u03C0",
  "pitchfork": "\u22D4",
  "piv": "\u03D6",
  "planck": "\u210F",
  "planckh": "\u210E",
  "plankv": "\u210F",
  "plus": "+",
  "plusacir": "\u2A23",
  "plusb": "\u229E",
  "pluscir": "\u2A22",
  "plusdo": "\u2214",
  "plusdu": "\u2A25",
  "pluse": "\u2A72",
  "PlusMinus": "\xB1",
  "plusmn": "\xB1",
  "plussim": "\u2A26",
  "plustwo": "\u2A27",
  "pm": "\xB1",
  "Poincareplane": "\u210C",
  "pointint": "\u2A15",
  "Popf": "\u2119",
  "popf": "\uD835\uDD61",
  "pound": "\xA3",
  "Pr": "\u2ABB",
  "pr": "\u227A",
  "prap": "\u2AB7",
  "prcue": "\u227C",
  "prE": "\u2AB3",
  "pre": "\u2AAF",
  "prec": "\u227A",
  "precapprox": "\u2AB7",
  "preccurlyeq": "\u227C",
  "Precedes": "\u227A",
  "PrecedesEqual": "\u2AAF",
  "PrecedesSlantEqual": "\u227C",
  "PrecedesTilde": "\u227E",
  "preceq": "\u2AAF",
  "precnapprox": "\u2AB9",
  "precneqq": "\u2AB5",
  "precnsim": "\u22E8",
  "precsim": "\u227E",
  "Prime": "\u2033",
  "prime": "\u2032",
  "primes": "\u2119",
  "prnap": "\u2AB9",
  "prnE": "\u2AB5",
  "prnsim": "\u22E8",
  "prod": "\u220F",
  "Product": "\u220F",
  "profalar": "\u232E",
  "profline": "\u2312",
  "profsurf": "\u2313",
  "prop": "\u221D",
  "Proportion": "\u2237",
  "Proportional": "\u221D",
  "propto": "\u221D",
  "prsim": "\u227E",
  "prurel": "\u22B0",
  "Pscr": "\uD835\uDCAB",
  "pscr": "\uD835\uDCC5",
  "Psi": "\u03A8",
  "psi": "\u03C8",
  "puncsp": "\u2008",
  "Qfr": "\uD835\uDD14",
  "qfr": "\uD835\uDD2E",
  "qint": "\u2A0C",
  "Qopf": "\u211A",
  "qopf": "\uD835\uDD62",
  "qprime": "\u2057",
  "Qscr": "\uD835\uDCAC",
  "qscr": "\uD835\uDCC6",
  "quaternions": "\u210D",
  "quatint": "\u2A16",
  "quest": "?",
  "questeq": "\u225F",
  "QUOT": "\"",
  "quot": "\"",
  "rAarr": "\u21DB",
  "race": "\u223D\u0331",
  "Racute": "\u0154",
  "racute": "\u0155",
  "radic": "\u221A",
  "raemptyv": "\u29B3",
  "Rang": "\u27EB",
  "rang": "\u27E9",
  "rangd": "\u2992",
  "range": "\u29A5",
  "rangle": "\u27E9",
  "raquo": "\xBB",
  "Rarr": "\u21A0",
  "rArr": "\u21D2",
  "rarr": "\u2192",
  "rarrap": "\u2975",
  "rarrb": "\u21E5",
  "rarrbfs": "\u2920",
  "rarrc": "\u2933",
  "rarrfs": "\u291E",
  "rarrhk": "\u21AA",
  "rarrlp": "\u21AC",
  "rarrpl": "\u2945",
  "rarrsim": "\u2974",
  "Rarrtl": "\u2916",
  "rarrtl": "\u21A3",
  "rarrw": "\u219D",
  "rAtail": "\u291C",
  "ratail": "\u291A",
  "ratio": "\u2236",
  "rationals": "\u211A",
  "RBarr": "\u2910",
  "rBarr": "\u290F",
  "rbarr": "\u290D",
  "rbbrk": "\u2773",
  "rbrace": "}",
  "rbrack": "]",
  "rbrke": "\u298C",
  "rbrksld": "\u298E",
  "rbrkslu": "\u2990",
  "Rcaron": "\u0158",
  "rcaron": "\u0159",
  "Rcedil": "\u0156",
  "rcedil": "\u0157",
  "rceil": "\u2309",
  "rcub": "}",
  "Rcy": "\u0420",
  "rcy": "\u0440",
  "rdca": "\u2937",
  "rdldhar": "\u2969",
  "rdquo": "\u201D",
  "rdquor": "\u201D",
  "rdsh": "\u21B3",
  "Re": "\u211C",
  "real": "\u211C",
  "realine": "\u211B",
  "realpart": "\u211C",
  "reals": "\u211D",
  "rect": "\u25AD",
  "REG": "\xAE",
  "reg": "\xAE",
  "ReverseElement": "\u220B",
  "ReverseEquilibrium": "\u21CB",
  "ReverseUpEquilibrium": "\u296F",
  "rfisht": "\u297D",
  "rfloor": "\u230B",
  "Rfr": "\u211C",
  "rfr": "\uD835\uDD2F",
  "rHar": "\u2964",
  "rhard": "\u21C1",
  "rharu": "\u21C0",
  "rharul": "\u296C",
  "Rho": "\u03A1",
  "rho": "\u03C1",
  "rhov": "\u03F1",
  "RightAngleBracket": "\u27E9",
  "RightArrow": "\u2192",
  "Rightarrow": "\u21D2",
  "rightarrow": "\u2192",
  "RightArrowBar": "\u21E5",
  "RightArrowLeftArrow": "\u21C4",
  "rightarrowtail": "\u21A3",
  "RightCeiling": "\u2309",
  "RightDoubleBracket": "\u27E7",
  "RightDownTeeVector": "\u295D",
  "RightDownVector": "\u21C2",
  "RightDownVectorBar": "\u2955",
  "RightFloor": "\u230B",
  "rightharpoondown": "\u21C1",
  "rightharpoonup": "\u21C0",
  "rightleftarrows": "\u21C4",
  "rightleftharpoons": "\u21CC",
  "rightrightarrows": "\u21C9",
  "rightsquigarrow": "\u219D",
  "RightTee": "\u22A2",
  "RightTeeArrow": "\u21A6",
  "RightTeeVector": "\u295B",
  "rightthreetimes": "\u22CC",
  "RightTriangle": "\u22B3",
  "RightTriangleBar": "\u29D0",
  "RightTriangleEqual": "\u22B5",
  "RightUpDownVector": "\u294F",
  "RightUpTeeVector": "\u295C",
  "RightUpVector": "\u21BE",
  "RightUpVectorBar": "\u2954",
  "RightVector": "\u21C0",
  "RightVectorBar": "\u2953",
  "ring": "\u02DA",
  "risingdotseq": "\u2253",
  "rlarr": "\u21C4",
  "rlhar": "\u21CC",
  "rlm": "\u200F",
  "rmoust": "\u23B1",
  "rmoustache": "\u23B1",
  "rnmid": "\u2AEE",
  "roang": "\u27ED",
  "roarr": "\u21FE",
  "robrk": "\u27E7",
  "ropar": "\u2986",
  "Ropf": "\u211D",
  "ropf": "\uD835\uDD63",
  "roplus": "\u2A2E",
  "rotimes": "\u2A35",
  "RoundImplies": "\u2970",
  "rpar": ")",
  "rpargt": "\u2994",
  "rppolint": "\u2A12",
  "rrarr": "\u21C9",
  "Rrightarrow": "\u21DB",
  "rsaquo": "\u203A",
  "Rscr": "\u211B",
  "rscr": "\uD835\uDCC7",
  "Rsh": "\u21B1",
  "rsh": "\u21B1",
  "rsqb": "]",
  "rsquo": "\u2019",
  "rsquor": "\u2019",
  "rthree": "\u22CC",
  "rtimes": "\u22CA",
  "rtri": "\u25B9",
  "rtrie": "\u22B5",
  "rtrif": "\u25B8",
  "rtriltri": "\u29CE",
  "RuleDelayed": "\u29F4",
  "ruluhar": "\u2968",
  "rx": "\u211E",
  "Sacute": "\u015A",
  "sacute": "\u015B",
  "sbquo": "\u201A",
  "Sc": "\u2ABC",
  "sc": "\u227B",
  "scap": "\u2AB8",
  "Scaron": "\u0160",
  "scaron": "\u0161",
  "sccue": "\u227D",
  "scE": "\u2AB4",
  "sce": "\u2AB0",
  "Scedil": "\u015E",
  "scedil": "\u015F",
  "Scirc": "\u015C",
  "scirc": "\u015D",
  "scnap": "\u2ABA",
  "scnE": "\u2AB6",
  "scnsim": "\u22E9",
  "scpolint": "\u2A13",
  "scsim": "\u227F",
  "Scy": "\u0421",
  "scy": "\u0441",
  "sdot": "\u22C5",
  "sdotb": "\u22A1",
  "sdote": "\u2A66",
  "searhk": "\u2925",
  "seArr": "\u21D8",
  "searr": "\u2198",
  "searrow": "\u2198",
  "sect": "\xA7",
  "semi": ";",
  "seswar": "\u2929",
  "setminus": "\u2216",
  "setmn": "\u2216",
  "sext": "\u2736",
  "Sfr": "\uD835\uDD16",
  "sfr": "\uD835\uDD30",
  "sfrown": "\u2322",
  "sharp": "\u266F",
  "SHCHcy": "\u0429",
  "shchcy": "\u0449",
  "SHcy": "\u0428",
  "shcy": "\u0448",
  "ShortDownArrow": "\u2193",
  "ShortLeftArrow": "\u2190",
  "shortmid": "\u2223",
  "shortparallel": "\u2225",
  "ShortRightArrow": "\u2192",
  "ShortUpArrow": "\u2191",
  "shy": "\xAD",
  "Sigma": "\u03A3",
  "sigma": "\u03C3",
  "sigmaf": "\u03C2",
  "sigmav": "\u03C2",
  "sim": "\u223C",
  "simdot": "\u2A6A",
  "sime": "\u2243",
  "simeq": "\u2243",
  "simg": "\u2A9E",
  "simgE": "\u2AA0",
  "siml": "\u2A9D",
  "simlE": "\u2A9F",
  "simne": "\u2246",
  "simplus": "\u2A24",
  "simrarr": "\u2972",
  "slarr": "\u2190",
  "SmallCircle": "\u2218",
  "smallsetminus": "\u2216",
  "smashp": "\u2A33",
  "smeparsl": "\u29E4",
  "smid": "\u2223",
  "smile": "\u2323",
  "smt": "\u2AAA",
  "smte": "\u2AAC",
  "smtes": "\u2AAC\uFE00",
  "SOFTcy": "\u042C",
  "softcy": "\u044C",
  "sol": "/",
  "solb": "\u29C4",
  "solbar": "\u233F",
  "Sopf": "\uD835\uDD4A",
  "sopf": "\uD835\uDD64",
  "spades": "\u2660",
  "spadesuit": "\u2660",
  "spar": "\u2225",
  "sqcap": "\u2293",
  "sqcaps": "\u2293\uFE00",
  "sqcup": "\u2294",
  "sqcups": "\u2294\uFE00",
  "Sqrt": "\u221A",
  "sqsub": "\u228F",
  "sqsube": "\u2291",
  "sqsubset": "\u228F",
  "sqsubseteq": "\u2291",
  "sqsup": "\u2290",
  "sqsupe": "\u2292",
  "sqsupset": "\u2290",
  "sqsupseteq": "\u2292",
  "squ": "\u25A1",
  "Square": "\u25A1",
  "square": "\u25A1",
  "SquareIntersection": "\u2293",
  "SquareSubset": "\u228F",
  "SquareSubsetEqual": "\u2291",
  "SquareSuperset": "\u2290",
  "SquareSupersetEqual": "\u2292",
  "SquareUnion": "\u2294",
  "squarf": "\u25AA",
  "squf": "\u25AA",
  "srarr": "\u2192",
  "Sscr": "\uD835\uDCAE",
  "sscr": "\uD835\uDCC8",
  "ssetmn": "\u2216",
  "ssmile": "\u2323",
  "sstarf": "\u22C6",
  "Star": "\u22C6",
  "star": "\u2606",
  "starf": "\u2605",
  "straightepsilon": "\u03F5",
  "straightphi": "\u03D5",
  "strns": "\xAF",
  "Sub": "\u22D0",
  "sub": "\u2282",
  "subdot": "\u2ABD",
  "subE": "\u2AC5",
  "sube": "\u2286",
  "subedot": "\u2AC3",
  "submult": "\u2AC1",
  "subnE": "\u2ACB",
  "subne": "\u228A",
  "subplus": "\u2ABF",
  "subrarr": "\u2979",
  "Subset": "\u22D0",
  "subset": "\u2282",
  "subseteq": "\u2286",
  "subseteqq": "\u2AC5",
  "SubsetEqual": "\u2286",
  "subsetneq": "\u228A",
  "subsetneqq": "\u2ACB",
  "subsim": "\u2AC7",
  "subsub": "\u2AD5",
  "subsup": "\u2AD3",
  "succ": "\u227B",
  "succapprox": "\u2AB8",
  "succcurlyeq": "\u227D",
  "Succeeds": "\u227B",
  "SucceedsEqual": "\u2AB0",
  "SucceedsSlantEqual": "\u227D",
  "SucceedsTilde": "\u227F",
  "succeq": "\u2AB0",
  "succnapprox": "\u2ABA",
  "succneqq": "\u2AB6",
  "succnsim": "\u22E9",
  "succsim": "\u227F",
  "SuchThat": "\u220B",
  "Sum": "\u2211",
  "sum": "\u2211",
  "sung": "\u266A",
  "Sup": "\u22D1",
  "sup": "\u2283",
  "sup1": "\xB9",
  "sup2": "\xB2",
  "sup3": "\xB3",
  "supdot": "\u2ABE",
  "supdsub": "\u2AD8",
  "supE": "\u2AC6",
  "supe": "\u2287",
  "supedot": "\u2AC4",
  "Superset": "\u2283",
  "SupersetEqual": "\u2287",
  "suphsol": "\u27C9",
  "suphsub": "\u2AD7",
  "suplarr": "\u297B",
  "supmult": "\u2AC2",
  "supnE": "\u2ACC",
  "supne": "\u228B",
  "supplus": "\u2AC0",
  "Supset": "\u22D1",
  "supset": "\u2283",
  "supseteq": "\u2287",
  "supseteqq": "\u2AC6",
  "supsetneq": "\u228B",
  "supsetneqq": "\u2ACC",
  "supsim": "\u2AC8",
  "supsub": "\u2AD4",
  "supsup": "\u2AD6",
  "swarhk": "\u2926",
  "swArr": "\u21D9",
  "swarr": "\u2199",
  "swarrow": "\u2199",
  "swnwar": "\u292A",
  "szlig": "\xDF",
  "Tab": "\t",
  "target": "\u2316",
  "Tau": "\u03A4",
  "tau": "\u03C4",
  "tbrk": "\u23B4",
  "Tcaron": "\u0164",
  "tcaron": "\u0165",
  "Tcedil": "\u0162",
  "tcedil": "\u0163",
  "Tcy": "\u0422",
  "tcy": "\u0442",
  "tdot": "\u20DB",
  "telrec": "\u2315",
  "Tfr": "\uD835\uDD17",
  "tfr": "\uD835\uDD31",
  "there4": "\u2234",
  "Therefore": "\u2234",
  "therefore": "\u2234",
  "Theta": "\u0398",
  "theta": "\u03B8",
  "thetasym": "\u03D1",
  "thetav": "\u03D1",
  "thickapprox": "\u2248",
  "thicksim": "\u223C",
  "ThickSpace": "\u205F\u200A",
  "thinsp": "\u2009",
  "ThinSpace": "\u2009",
  "thkap": "\u2248",
  "thksim": "\u223C",
  "THORN": "\xDE",
  "thorn": "\xFE",
  "Tilde": "\u223C",
  "tilde": "\u02DC",
  "TildeEqual": "\u2243",
  "TildeFullEqual": "\u2245",
  "TildeTilde": "\u2248",
  "times": "\xD7",
  "timesb": "\u22A0",
  "timesbar": "\u2A31",
  "timesd": "\u2A30",
  "tint": "\u222D",
  "toea": "\u2928",
  "top": "\u22A4",
  "topbot": "\u2336",
  "topcir": "\u2AF1",
  "Topf": "\uD835\uDD4B",
  "topf": "\uD835\uDD65",
  "topfork": "\u2ADA",
  "tosa": "\u2929",
  "tprime": "\u2034",
  "TRADE": "\u2122",
  "trade": "\u2122",
  "triangle": "\u25B5",
  "triangledown": "\u25BF",
  "triangleleft": "\u25C3",
  "trianglelefteq": "\u22B4",
  "triangleq": "\u225C",
  "triangleright": "\u25B9",
  "trianglerighteq": "\u22B5",
  "tridot": "\u25EC",
  "trie": "\u225C",
  "triminus": "\u2A3A",
  "TripleDot": "\u20DB",
  "triplus": "\u2A39",
  "trisb": "\u29CD",
  "tritime": "\u2A3B",
  "trpezium": "\u23E2",
  "Tscr": "\uD835\uDCAF",
  "tscr": "\uD835\uDCC9",
  "TScy": "\u0426",
  "tscy": "\u0446",
  "TSHcy": "\u040B",
  "tshcy": "\u045B",
  "Tstrok": "\u0166",
  "tstrok": "\u0167",
  "twixt": "\u226C",
  "twoheadleftarrow": "\u219E",
  "twoheadrightarrow": "\u21A0",
  "Uacute": "\xDA",
  "uacute": "\xFA",
  "Uarr": "\u219F",
  "uArr": "\u21D1",
  "uarr": "\u2191",
  "Uarrocir": "\u2949",
  "Ubrcy": "\u040E",
  "ubrcy": "\u045E",
  "Ubreve": "\u016C",
  "ubreve": "\u016D",
  "Ucirc": "\xDB",
  "ucirc": "\xFB",
  "Ucy": "\u0423",
  "ucy": "\u0443",
  "udarr": "\u21C5",
  "Udblac": "\u0170",
  "udblac": "\u0171",
  "udhar": "\u296E",
  "ufisht": "\u297E",
  "Ufr": "\uD835\uDD18",
  "ufr": "\uD835\uDD32",
  "Ugrave": "\xD9",
  "ugrave": "\xF9",
  "uHar": "\u2963",
  "uharl": "\u21BF",
  "uharr": "\u21BE",
  "uhblk": "\u2580",
  "ulcorn": "\u231C",
  "ulcorner": "\u231C",
  "ulcrop": "\u230F",
  "ultri": "\u25F8",
  "Umacr": "\u016A",
  "umacr": "\u016B",
  "uml": "\xA8",
  "UnderBar": "_",
  "UnderBrace": "\u23DF",
  "UnderBracket": "\u23B5",
  "UnderParenthesis": "\u23DD",
  "Union": "\u22C3",
  "UnionPlus": "\u228E",
  "Uogon": "\u0172",
  "uogon": "\u0173",
  "Uopf": "\uD835\uDD4C",
  "uopf": "\uD835\uDD66",
  "UpArrow": "\u2191",
  "Uparrow": "\u21D1",
  "uparrow": "\u2191",
  "UpArrowBar": "\u2912",
  "UpArrowDownArrow": "\u21C5",
  "UpDownArrow": "\u2195",
  "Updownarrow": "\u21D5",
  "updownarrow": "\u2195",
  "UpEquilibrium": "\u296E",
  "upharpoonleft": "\u21BF",
  "upharpoonright": "\u21BE",
  "uplus": "\u228E",
  "UpperLeftArrow": "\u2196",
  "UpperRightArrow": "\u2197",
  "Upsi": "\u03D2",
  "upsi": "\u03C5",
  "upsih": "\u03D2",
  "Upsilon": "\u03A5",
  "upsilon": "\u03C5",
  "UpTee": "\u22A5",
  "UpTeeArrow": "\u21A5",
  "upuparrows": "\u21C8",
  "urcorn": "\u231D",
  "urcorner": "\u231D",
  "urcrop": "\u230E",
  "Uring": "\u016E",
  "uring": "\u016F",
  "urtri": "\u25F9",
  "Uscr": "\uD835\uDCB0",
  "uscr": "\uD835\uDCCA",
  "utdot": "\u22F0",
  "Utilde": "\u0168",
  "utilde": "\u0169",
  "utri": "\u25B5",
  "utrif": "\u25B4",
  "uuarr": "\u21C8",
  "Uuml": "\xDC",
  "uuml": "\xFC",
  "uwangle": "\u29A7",
  "vangrt": "\u299C",
  "varepsilon": "\u03F5",
  "varkappa": "\u03F0",
  "varnothing": "\u2205",
  "varphi": "\u03D5",
  "varpi": "\u03D6",
  "varpropto": "\u221D",
  "vArr": "\u21D5",
  "varr": "\u2195",
  "varrho": "\u03F1",
  "varsigma": "\u03C2",
  "varsubsetneq": "\u228A\uFE00",
  "varsubsetneqq": "\u2ACB\uFE00",
  "varsupsetneq": "\u228B\uFE00",
  "varsupsetneqq": "\u2ACC\uFE00",
  "vartheta": "\u03D1",
  "vartriangleleft": "\u22B2",
  "vartriangleright": "\u22B3",
  "Vbar": "\u2AEB",
  "vBar": "\u2AE8",
  "vBarv": "\u2AE9",
  "Vcy": "\u0412",
  "vcy": "\u0432",
  "VDash": "\u22AB",
  "Vdash": "\u22A9",
  "vDash": "\u22A8",
  "vdash": "\u22A2",
  "Vdashl": "\u2AE6",
  "Vee": "\u22C1",
  "vee": "\u2228",
  "veebar": "\u22BB",
  "veeeq": "\u225A",
  "vellip": "\u22EE",
  "Verbar": "\u2016",
  "verbar": "|",
  "Vert": "\u2016",
  "vert": "|",
  "VerticalBar": "\u2223",
  "VerticalLine": "|",
  "VerticalSeparator": "\u2758",
  "VerticalTilde": "\u2240",
  "VeryThinSpace": "\u200A",
  "Vfr": "\uD835\uDD19",
  "vfr": "\uD835\uDD33",
  "vltri": "\u22B2",
  "vnsub": "\u2282\u20D2",
  "vnsup": "\u2283\u20D2",
  "Vopf": "\uD835\uDD4D",
  "vopf": "\uD835\uDD67",
  "vprop": "\u221D",
  "vrtri": "\u22B3",
  "Vscr": "\uD835\uDCB1",
  "vscr": "\uD835\uDCCB",
  "vsubnE": "\u2ACB\uFE00",
  "vsubne": "\u228A\uFE00",
  "vsupnE": "\u2ACC\uFE00",
  "vsupne": "\u228B\uFE00",
  "Vvdash": "\u22AA",
  "vzigzag": "\u299A",
  "Wcirc": "\u0174",
  "wcirc": "\u0175",
  "wedbar": "\u2A5F",
  "Wedge": "\u22C0",
  "wedge": "\u2227",
  "wedgeq": "\u2259",
  "weierp": "\u2118",
  "Wfr": "\uD835\uDD1A",
  "wfr": "\uD835\uDD34",
  "Wopf": "\uD835\uDD4E",
  "wopf": "\uD835\uDD68",
  "wp": "\u2118",
  "wr": "\u2240",
  "wreath": "\u2240",
  "Wscr": "\uD835\uDCB2",
  "wscr": "\uD835\uDCCC",
  "xcap": "\u22C2",
  "xcirc": "\u25EF",
  "xcup": "\u22C3",
  "xdtri": "\u25BD",
  "Xfr": "\uD835\uDD1B",
  "xfr": "\uD835\uDD35",
  "xhArr": "\u27FA",
  "xharr": "\u27F7",
  "Xi": "\u039E",
  "xi": "\u03BE",
  "xlArr": "\u27F8",
  "xlarr": "\u27F5",
  "xmap": "\u27FC",
  "xnis": "\u22FB",
  "xodot": "\u2A00",
  "Xopf": "\uD835\uDD4F",
  "xopf": "\uD835\uDD69",
  "xoplus": "\u2A01",
  "xotime": "\u2A02",
  "xrArr": "\u27F9",
  "xrarr": "\u27F6",
  "Xscr": "\uD835\uDCB3",
  "xscr": "\uD835\uDCCD",
  "xsqcup": "\u2A06",
  "xuplus": "\u2A04",
  "xutri": "\u25B3",
  "xvee": "\u22C1",
  "xwedge": "\u22C0",
  "Yacute": "\xDD",
  "yacute": "\xFD",
  "YAcy": "\u042F",
  "yacy": "\u044F",
  "Ycirc": "\u0176",
  "ycirc": "\u0177",
  "Ycy": "\u042B",
  "ycy": "\u044B",
  "yen": "\xA5",
  "Yfr": "\uD835\uDD1C",
  "yfr": "\uD835\uDD36",
  "YIcy": "\u0407",
  "yicy": "\u0457",
  "Yopf": "\uD835\uDD50",
  "yopf": "\uD835\uDD6A",
  "Yscr": "\uD835\uDCB4",
  "yscr": "\uD835\uDCCE",
  "YUcy": "\u042E",
  "yucy": "\u044E",
  "Yuml": "\u0178",
  "yuml": "\xFF",
  "Zacute": "\u0179",
  "zacute": "\u017A",
  "Zcaron": "\u017D",
  "zcaron": "\u017E",
  "Zcy": "\u0417",
  "zcy": "\u0437",
  "Zdot": "\u017B",
  "zdot": "\u017C",
  "zeetrf": "\u2128",
  "ZeroWidthSpace": "\u200B",
  "Zeta": "\u0396",
  "zeta": "\u03B6",
  "Zfr": "\u2128",
  "zfr": "\uD835\uDD37",
  "ZHcy": "\u0416",
  "zhcy": "\u0436",
  "zigrarr": "\u21DD",
  "Zopf": "\u2124",
  "zopf": "\uD835\uDD6B",
  "Zscr": "\uD835\uDCB5",
  "zscr": "\uD835\uDCCF",
  "zwj": "\u200D",
  "zwnj": "\u200C"
};
var hasOwn = Object.prototype.hasOwnProperty;

function has(object, key) {
  return object ? hasOwn.call(object, key) : false;
}

function decodeEntity(name) {
  if (has(entities, name)) {
    return entities[name];
  } else {
    return name;
  }
}

var hasOwn$1 = Object.prototype.hasOwnProperty;

function has$1(object, key) {
  return object ? hasOwn$1.call(object, key) : false;
} // Extend objects
//


function assign(obj
/*from1, from2, from3, ...*/
) {
  var sources = [].slice.call(arguments, 1);
  sources.forEach(function (source) {
    if (!source) {
      return;
    }

    if (typeof source !== 'object') {
      throw new TypeError(source + 'must be object');
    }

    Object.keys(source).forEach(function (key) {
      obj[key] = source[key];
    });
  });
  return obj;
} ////////////////////////////////////////////////////////////////////////////////


var UNESCAPE_MD_RE = /\\([\\!"#$%&'()*+,.\/:;<=>?@[\]^_`{|}~-])/g;

function unescapeMd(str) {
  if (str.indexOf('\\') < 0) {
    return str;
  }

  return str.replace(UNESCAPE_MD_RE, '$1');
} ////////////////////////////////////////////////////////////////////////////////


function isValidEntityCode(c) {
  /*eslint no-bitwise:0*/
  // broken sequence
  if (c >= 0xD800 && c <= 0xDFFF) {
    return false;
  } // never used


  if (c >= 0xFDD0 && c <= 0xFDEF) {
    return false;
  }

  if ((c & 0xFFFF) === 0xFFFF || (c & 0xFFFF) === 0xFFFE) {
    return false;
  } // control codes


  if (c >= 0x00 && c <= 0x08) {
    return false;
  }

  if (c === 0x0B) {
    return false;
  }

  if (c >= 0x0E && c <= 0x1F) {
    return false;
  }

  if (c >= 0x7F && c <= 0x9F) {
    return false;
  } // out of range


  if (c > 0x10FFFF) {
    return false;
  }

  return true;
}

function fromCodePoint(c) {
  /*eslint no-bitwise:0*/
  if (c > 0xffff) {
    c -= 0x10000;
    var surrogate1 = 0xd800 + (c >> 10),
        surrogate2 = 0xdc00 + (c & 0x3ff);
    return String.fromCharCode(surrogate1, surrogate2);
  }

  return String.fromCharCode(c);
}

var NAMED_ENTITY_RE = /&([a-z#][a-z0-9]{1,31});/gi;
var DIGITAL_ENTITY_TEST_RE = /^#((?:x[a-f0-9]{1,8}|[0-9]{1,8}))/i;

function replaceEntityPattern(match, name) {
  var code = 0;
  var decoded = decodeEntity(name);

  if (name !== decoded) {
    return decoded;
  } else if (name.charCodeAt(0) === 0x23
  /* # */
  && DIGITAL_ENTITY_TEST_RE.test(name)) {
    code = name[1].toLowerCase() === 'x' ? parseInt(name.slice(2), 16) : parseInt(name.slice(1), 10);

    if (isValidEntityCode(code)) {
      return fromCodePoint(code);
    }
  }

  return match;
}

function replaceEntities(str) {
  if (str.indexOf('&') < 0) {
    return str;
  }

  return str.replace(NAMED_ENTITY_RE, replaceEntityPattern);
} ////////////////////////////////////////////////////////////////////////////////


var HTML_ESCAPE_TEST_RE = /[&<>"]/;
var HTML_ESCAPE_REPLACE_RE = /[&<>"]/g;
var HTML_REPLACEMENTS = {
  '&': '&amp;',
  '<': '&lt;',
  '>': '&gt;',
  '"': '&quot;'
};

function replaceUnsafeChar(ch) {
  return HTML_REPLACEMENTS[ch];
}

function escapeHtml(str) {
  if (HTML_ESCAPE_TEST_RE.test(str)) {
    return str.replace(HTML_ESCAPE_REPLACE_RE, replaceUnsafeChar);
  }

  return str;
}
/**
 * Renderer rules cache
 */

var rules = {};
/**
 * Blockquotes
 */

rules.blockquote_open = function ()
/* tokens, idx, options, env */
{
  return '<blockquote>\n';
};

rules.blockquote_close = function (tokens, idx
/*, options, env */
) {
  return '</blockquote>' + getBreak(tokens, idx);
};
/**
 * Code
 */


rules.code = function (tokens, idx
/*, options, env */
) {
  if (tokens[idx].block) {
    return '<pre><code>' + escapeHtml(tokens[idx].content) + '</code></pre>' + getBreak(tokens, idx);
  }

  return '<code>' + escapeHtml(tokens[idx].content) + '</code>';
};
/**
 * Fenced code blocks
 */


rules.fence = function (tokens, idx, options, env, instance) {
  var token = tokens[idx];
  var langClass = '';
  var langPrefix = options.langPrefix;
  var langName = '',
      fences,
      fenceName;
  var highlighted;

  if (token.params) {
    //
    // ```foo bar
    //
    // Try custom renderer "foo" first. That will simplify overwrite
    // for diagrams, latex, and any other fenced block with custom look
    //
    fences = token.params.split(/\s+/g);
    fenceName = fences.join(' ');

    if (has$1(instance.rules.fence_custom, fences[0])) {
      return instance.rules.fence_custom[fences[0]](tokens, idx, options, env, instance);
    }

    langName = escapeHtml(replaceEntities(unescapeMd(fenceName)));
    langClass = ' class="' + langPrefix + langName + '"';
  }

  if (options.highlight) {
    highlighted = options.highlight.apply(options.highlight, [token.content].concat(fences)) || escapeHtml(token.content);
  } else {
    highlighted = escapeHtml(token.content);
  }

  return '<pre><code' + langClass + '>' + highlighted + '</code></pre>' + getBreak(tokens, idx);
};

rules.fence_custom = {};
/**
 * Headings
 */

rules.heading_open = function (tokens, idx
/*, options, env */
) {
  return '<h' + tokens[idx].hLevel + '>';
};

rules.heading_close = function (tokens, idx
/*, options, env */
) {
  return '</h' + tokens[idx].hLevel + '>\n';
};
/**
 * Horizontal rules
 */


rules.hr = function (tokens, idx, options
/*, env */
) {
  return (options.xhtmlOut ? '<hr />' : '<hr>') + getBreak(tokens, idx);
};
/**
 * Bullets
 */


rules.bullet_list_open = function ()
/* tokens, idx, options, env */
{
  return '<ul>\n';
};

rules.bullet_list_close = function (tokens, idx
/*, options, env */
) {
  return '</ul>' + getBreak(tokens, idx);
};
/**
 * List items
 */


rules.list_item_open = function ()
/* tokens, idx, options, env */
{
  return '<li>';
};

rules.list_item_close = function ()
/* tokens, idx, options, env */
{
  return '</li>\n';
};
/**
 * Ordered list items
 */


rules.ordered_list_open = function (tokens, idx
/*, options, env */
) {
  var token = tokens[idx];
  var order = token.order > 1 ? ' start="' + token.order + '"' : '';
  return '<ol' + order + '>\n';
};

rules.ordered_list_close = function (tokens, idx
/*, options, env */
) {
  return '</ol>' + getBreak(tokens, idx);
};
/**
 * Paragraphs
 */


rules.paragraph_open = function (tokens, idx
/*, options, env */
) {
  return tokens[idx].tight ? '' : '<p>';
};

rules.paragraph_close = function (tokens, idx
/*, options, env */
) {
  var addBreak = !(tokens[idx].tight && idx && tokens[idx - 1].type === 'inline' && !tokens[idx - 1].content);
  return (tokens[idx].tight ? '' : '</p>') + (addBreak ? getBreak(tokens, idx) : '');
};
/**
 * Links
 */


rules.link_open = function (tokens, idx, options
/* env */
) {
  var title = tokens[idx].title ? ' title="' + escapeHtml(replaceEntities(tokens[idx].title)) + '"' : '';
  var target = options.linkTarget ? ' target="' + options.linkTarget + '"' : '';
  return '<a href="' + escapeHtml(tokens[idx].href) + '"' + title + target + '>';
};

rules.link_close = function ()
/* tokens, idx, options, env */
{
  return '</a>';
};
/**
 * Images
 */


rules.image = function (tokens, idx, options
/*, env */
) {
  var src = ' src="' + escapeHtml(tokens[idx].src) + '"';
  var title = tokens[idx].title ? ' title="' + escapeHtml(replaceEntities(tokens[idx].title)) + '"' : '';
  var alt = ' alt="' + (tokens[idx].alt ? escapeHtml(replaceEntities(unescapeMd(tokens[idx].alt))) : '') + '"';
  var suffix = options.xhtmlOut ? ' /' : '';
  return '<img' + src + alt + title + suffix + '>';
};
/**
 * Tables
 */


rules.table_open = function ()
/* tokens, idx, options, env */
{
  return '<table>\n';
};

rules.table_close = function ()
/* tokens, idx, options, env */
{
  return '</table>\n';
};

rules.thead_open = function ()
/* tokens, idx, options, env */
{
  return '<thead>\n';
};

rules.thead_close = function ()
/* tokens, idx, options, env */
{
  return '</thead>\n';
};

rules.tbody_open = function ()
/* tokens, idx, options, env */
{
  return '<tbody>\n';
};

rules.tbody_close = function ()
/* tokens, idx, options, env */
{
  return '</tbody>\n';
};

rules.tr_open = function ()
/* tokens, idx, options, env */
{
  return '<tr>';
};

rules.tr_close = function ()
/* tokens, idx, options, env */
{
  return '</tr>\n';
};

rules.th_open = function (tokens, idx
/*, options, env */
) {
  var token = tokens[idx];
  return '<th' + (token.align ? ' style="text-align:' + token.align + '"' : '') + '>';
};

rules.th_close = function ()
/* tokens, idx, options, env */
{
  return '</th>';
};

rules.td_open = function (tokens, idx
/*, options, env */
) {
  var token = tokens[idx];
  return '<td' + (token.align ? ' style="text-align:' + token.align + '"' : '') + '>';
};

rules.td_close = function ()
/* tokens, idx, options, env */
{
  return '</td>';
};
/**
 * Bold
 */


rules.strong_open = function ()
/* tokens, idx, options, env */
{
  return '<strong>';
};

rules.strong_close = function ()
/* tokens, idx, options, env */
{
  return '</strong>';
};
/**
 * Italicize
 */


rules.em_open = function ()
/* tokens, idx, options, env */
{
  return '<em>';
};

rules.em_close = function ()
/* tokens, idx, options, env */
{
  return '</em>';
};
/**
 * Strikethrough
 */


rules.del_open = function ()
/* tokens, idx, options, env */
{
  return '<del>';
};

rules.del_close = function ()
/* tokens, idx, options, env */
{
  return '</del>';
};
/**
 * Insert
 */


rules.ins_open = function ()
/* tokens, idx, options, env */
{
  return '<ins>';
};

rules.ins_close = function ()
/* tokens, idx, options, env */
{
  return '</ins>';
};
/**
 * Highlight
 */


rules.mark_open = function ()
/* tokens, idx, options, env */
{
  return '<mark>';
};

rules.mark_close = function ()
/* tokens, idx, options, env */
{
  return '</mark>';
};
/**
 * Super- and sub-script
 */


rules.sub = function (tokens, idx
/*, options, env */
) {
  return '<sub>' + escapeHtml(tokens[idx].content) + '</sub>';
};

rules.sup = function (tokens, idx
/*, options, env */
) {
  return '<sup>' + escapeHtml(tokens[idx].content) + '</sup>';
};
/**
 * Breaks
 */


rules.hardbreak = function (tokens, idx, options
/*, env */
) {
  return options.xhtmlOut ? '<br />\n' : '<br>\n';
};

rules.softbreak = function (tokens, idx, options
/*, env */
) {
  return options.breaks ? options.xhtmlOut ? '<br />\n' : '<br>\n' : '\n';
};
/**
 * Text
 */


rules.text = function (tokens, idx
/*, options, env */
) {
  return escapeHtml(tokens[idx].content);
};
/**
 * Content
 */


rules.htmlblock = function (tokens, idx
/*, options, env */
) {
  return tokens[idx].content;
};

rules.htmltag = function (tokens, idx
/*, options, env */
) {
  return tokens[idx].content;
};
/**
 * Abbreviations, initialism
 */


rules.abbr_open = function (tokens, idx
/*, options, env */
) {
  return '<abbr title="' + escapeHtml(replaceEntities(tokens[idx].title)) + '">';
};

rules.abbr_close = function ()
/* tokens, idx, options, env */
{
  return '</abbr>';
};
/**
 * Footnotes
 */


rules.footnote_ref = function (tokens, idx) {
  var n = Number(tokens[idx].id + 1).toString();
  var id = 'fnref' + n;

  if (tokens[idx].subId > 0) {
    id += ':' + tokens[idx].subId;
  }

  return '<sup class="footnote-ref"><a href="#fn' + n + '" id="' + id + '">[' + n + ']</a></sup>';
};

rules.footnote_block_open = function (tokens, idx, options) {
  var hr = options.xhtmlOut ? '<hr class="footnotes-sep" />\n' : '<hr class="footnotes-sep">\n';
  return hr + '<section class="footnotes">\n<ol class="footnotes-list">\n';
};

rules.footnote_block_close = function () {
  return '</ol>\n</section>\n';
};

rules.footnote_open = function (tokens, idx) {
  var id = Number(tokens[idx].id + 1).toString();
  return '<li id="fn' + id + '"  class="footnote-item">';
};

rules.footnote_close = function () {
  return '</li>\n';
};

rules.footnote_anchor = function (tokens, idx) {
  var n = Number(tokens[idx].id + 1).toString();
  var id = 'fnref' + n;

  if (tokens[idx].subId > 0) {
    id += ':' + tokens[idx].subId;
  }

  return ' <a href="#' + id + '" class="footnote-backref">↩</a>';
};
/**
 * Definition lists
 */


rules.dl_open = function () {
  return '<dl>\n';
};

rules.dt_open = function () {
  return '<dt>';
};

rules.dd_open = function () {
  return '<dd>';
};

rules.dl_close = function () {
  return '</dl>\n';
};

rules.dt_close = function () {
  return '</dt>\n';
};

rules.dd_close = function () {
  return '</dd>\n';
};
/**
 * Helper functions
 */


function nextToken(tokens, idx) {
  if (++idx >= tokens.length - 2) {
    return idx;
  }

  if (tokens[idx].type === 'paragraph_open' && tokens[idx].tight && tokens[idx + 1].type === 'inline' && tokens[idx + 1].content.length === 0 && tokens[idx + 2].type === 'paragraph_close' && tokens[idx + 2].tight) {
    return nextToken(tokens, idx + 2);
  }

  return idx;
}
/**
 * Check to see if `\n` is needed before the next token.
 *
 * @param  {Array} `tokens`
 * @param  {Number} `idx`
 * @return {String} Empty string or newline
 * @api private
 */


var getBreak = rules.getBreak = function getBreak(tokens, idx) {
  idx = nextToken(tokens, idx);

  if (idx < tokens.length && tokens[idx].type === 'list_item_close') {
    return '';
  }

  return '\n';
};
/**
 * Renderer class. Renders HTML and exposes `rules` to allow
 * local modifications.
 */


function Renderer() {
  this.rules = assign({}, rules); // exported helper, for custom rules only

  this.getBreak = rules.getBreak;
}
/**
 * Render a string of inline HTML with the given `tokens` and
 * `options`.
 *
 * @param  {Array} `tokens`
 * @param  {Object} `options`
 * @param  {Object} `env`
 * @return {String}
 * @api public
 */


Renderer.prototype.renderInline = function (tokens, options, env) {
  var _rules = this.rules;
  var len = tokens.length,
      i = 0;
  var result = '';

  while (len--) {
    result += _rules[tokens[i].type](tokens, i++, options, env, this);
  }

  return result;
};
/**
 * Render a string of HTML with the given `tokens` and
 * `options`.
 *
 * @param  {Array} `tokens`
 * @param  {Object} `options`
 * @param  {Object} `env`
 * @return {String}
 * @api public
 */


Renderer.prototype.render = function (tokens, options, env) {
  var _rules = this.rules;
  var len = tokens.length,
      i = -1;
  var result = '';

  while (++i < len) {
    if (tokens[i].type === 'inline') {
      result += this.renderInline(tokens[i].children, options, env);
    } else {
      result += _rules[tokens[i].type](tokens, i, options, env, this);
    }
  }

  return result;
};
/**
 * Ruler is a helper class for building responsibility chains from
 * parse rules. It allows:
 *
 *   - easy stack rules chains
 *   - getting main chain and named chains content (as arrays of functions)
 *
 * Helper methods, should not be used directly.
 * @api private
 */


function Ruler() {
  // List of added rules. Each element is:
  //
  // { name: XXX,
  //   enabled: Boolean,
  //   fn: Function(),
  //   alt: [ name2, name3 ] }
  //
  this.__rules__ = []; // Cached rule chains.
  //
  // First level - chain name, '' for default.
  // Second level - digital anchor for fast filtering by charcodes.
  //

  this.__cache__ = null;
}
/**
 * Find the index of a rule by `name`.
 *
 * @param  {String} `name`
 * @return {Number} Index of the given `name`
 * @api private
 */


Ruler.prototype.__find__ = function (name) {
  var len = this.__rules__.length;
  var i = -1;

  while (len--) {
    if (this.__rules__[++i].name === name) {
      return i;
    }
  }

  return -1;
};
/**
 * Build the rules lookup cache
 *
 * @api private
 */


Ruler.prototype.__compile__ = function () {
  var self = this;
  var chains = ['']; // collect unique names

  self.__rules__.forEach(function (rule) {
    if (!rule.enabled) {
      return;
    }

    rule.alt.forEach(function (altName) {
      if (chains.indexOf(altName) < 0) {
        chains.push(altName);
      }
    });
  });

  self.__cache__ = {};
  chains.forEach(function (chain) {
    self.__cache__[chain] = [];

    self.__rules__.forEach(function (rule) {
      if (!rule.enabled) {
        return;
      }

      if (chain && rule.alt.indexOf(chain) < 0) {
        return;
      }

      self.__cache__[chain].push(rule.fn);
    });
  });
};
/**
 * Ruler public methods
 * ------------------------------------------------
 */

/**
 * Replace rule function
 *
 * @param  {String} `name` Rule name
 * @param  {Function `fn`
 * @param  {Object} `options`
 * @api private
 */


Ruler.prototype.at = function (name, fn, options) {
  var idx = this.__find__(name);

  var opt = options || {};

  if (idx === -1) {
    throw new Error('Parser rule not found: ' + name);
  }

  this.__rules__[idx].fn = fn;
  this.__rules__[idx].alt = opt.alt || [];
  this.__cache__ = null;
};
/**
 * Add a rule to the chain before given the `ruleName`.
 *
 * @param  {String}   `beforeName`
 * @param  {String}   `ruleName`
 * @param  {Function} `fn`
 * @param  {Object}   `options`
 * @api private
 */


Ruler.prototype.before = function (beforeName, ruleName, fn, options) {
  var idx = this.__find__(beforeName);

  var opt = options || {};

  if (idx === -1) {
    throw new Error('Parser rule not found: ' + beforeName);
  }

  this.__rules__.splice(idx, 0, {
    name: ruleName,
    enabled: true,
    fn: fn,
    alt: opt.alt || []
  });

  this.__cache__ = null;
};
/**
 * Add a rule to the chain after the given `ruleName`.
 *
 * @param  {String}   `afterName`
 * @param  {String}   `ruleName`
 * @param  {Function} `fn`
 * @param  {Object}   `options`
 * @api private
 */


Ruler.prototype.after = function (afterName, ruleName, fn, options) {
  var idx = this.__find__(afterName);

  var opt = options || {};

  if (idx === -1) {
    throw new Error('Parser rule not found: ' + afterName);
  }

  this.__rules__.splice(idx + 1, 0, {
    name: ruleName,
    enabled: true,
    fn: fn,
    alt: opt.alt || []
  });

  this.__cache__ = null;
};
/**
 * Add a rule to the end of chain.
 *
 * @param  {String}   `ruleName`
 * @param  {Function} `fn`
 * @param  {Object}   `options`
 * @return {String}
 */


Ruler.prototype.push = function (ruleName, fn, options) {
  var opt = options || {};

  this.__rules__.push({
    name: ruleName,
    enabled: true,
    fn: fn,
    alt: opt.alt || []
  });

  this.__cache__ = null;
};
/**
 * Enable a rule or list of rules.
 *
 * @param  {String|Array} `list` Name or array of rule names to enable
 * @param  {Boolean} `strict` If `true`, all non listed rules will be disabled.
 * @api private
 */


Ruler.prototype.enable = function (list, strict) {
  list = !Array.isArray(list) ? [list] : list; // In strict mode disable all existing rules first

  if (strict) {
    this.__rules__.forEach(function (rule) {
      rule.enabled = false;
    });
  } // Search by name and enable


  list.forEach(function (name) {
    var idx = this.__find__(name);

    if (idx < 0) {
      throw new Error('Rules manager: invalid rule name ' + name);
    }

    this.__rules__[idx].enabled = true;
  }, this);
  this.__cache__ = null;
};
/**
 * Disable a rule or list of rules.
 *
 * @param  {String|Array} `list` Name or array of rule names to disable
 * @api private
 */


Ruler.prototype.disable = function (list) {
  list = !Array.isArray(list) ? [list] : list; // Search by name and disable

  list.forEach(function (name) {
    var idx = this.__find__(name);

    if (idx < 0) {
      throw new Error('Rules manager: invalid rule name ' + name);
    }

    this.__rules__[idx].enabled = false;
  }, this);
  this.__cache__ = null;
};
/**
 * Get a rules list as an array of functions.
 *
 * @param  {String} `chainName`
 * @return {Object}
 * @api private
 */


Ruler.prototype.getRules = function (chainName) {
  if (this.__cache__ === null) {
    this.__compile__();
  }

  return this.__cache__[chainName] || [];
};

function block(state) {
  if (state.inlineMode) {
    state.tokens.push({
      type: 'inline',
      content: state.src.replace(/\n/g, ' ').trim(),
      level: 0,
      lines: [0, 1],
      children: []
    });
  } else {
    state.block.parse(state.src, state.options, state.env, state.tokens);
  }
} // Inline parser state


function StateInline(src, parserInline, options, env, outTokens) {
  this.src = src;
  this.env = env;
  this.options = options;
  this.parser = parserInline;
  this.tokens = outTokens;
  this.pos = 0;
  this.posMax = this.src.length;
  this.level = 0;
  this.pending = '';
  this.pendingLevel = 0;
  this.cache = []; // Stores { start: end } pairs. Useful for backtrack
  // optimization of pairs parse (emphasis, strikes).
  // Link parser state vars

  this.isInLabel = false; // Set true when seek link label - we should disable
  // "paired" rules (emphasis, strikes) to not skip
  // tailing `]`

  this.linkLevel = 0; // Increment for each nesting link. Used to prevent
  // nesting in definitions

  this.linkContent = ''; // Temporary storage for link url

  this.labelUnmatchedScopes = 0; // Track unpaired `[` for link labels
  // (backtrack optimization)
} // Flush pending text
//


StateInline.prototype.pushPending = function () {
  this.tokens.push({
    type: 'text',
    content: this.pending,
    level: this.pendingLevel
  });
  this.pending = '';
}; // Push new token to "stream".
// If pending text exists - flush it as text token
//


StateInline.prototype.push = function (token) {
  if (this.pending) {
    this.pushPending();
  }

  this.tokens.push(token);
  this.pendingLevel = this.level;
}; // Store value to cache.
// !!! Implementation has parser-specific optimizations
// !!! keys MUST be integer, >= 0; values MUST be integer, > 0
//


StateInline.prototype.cacheSet = function (key, val) {
  for (var i = this.cache.length; i <= key; i++) {
    this.cache.push(0);
  }

  this.cache[key] = val;
}; // Get cache value
//


StateInline.prototype.cacheGet = function (key) {
  return key < this.cache.length ? this.cache[key] : 0;
};
/**
 * Parse link labels
 *
 * This function assumes that first character (`[`) already matches;
 * returns the end of the label.
 *
 * @param  {Object} state
 * @param  {Number} start
 * @api private
 */


function parseLinkLabel(state, start) {
  var level,
      found,
      marker,
      labelEnd = -1,
      max = state.posMax,
      oldPos = state.pos,
      oldFlag = state.isInLabel;

  if (state.isInLabel) {
    return -1;
  }

  if (state.labelUnmatchedScopes) {
    state.labelUnmatchedScopes--;
    return -1;
  }

  state.pos = start + 1;
  state.isInLabel = true;
  level = 1;

  while (state.pos < max) {
    marker = state.src.charCodeAt(state.pos);

    if (marker === 0x5B
    /* [ */
    ) {
        level++;
      } else if (marker === 0x5D
    /* ] */
    ) {
        level--;

        if (level === 0) {
          found = true;
          break;
        }
      }

    state.parser.skipToken(state);
  }

  if (found) {
    labelEnd = state.pos;
    state.labelUnmatchedScopes = 0;
  } else {
    state.labelUnmatchedScopes = level - 1;
  } // restore old state


  state.pos = oldPos;
  state.isInLabel = oldFlag;
  return labelEnd;
} // Parse abbreviation definitions, i.e. `*[abbr]: description`


function parseAbbr(str, parserInline, options, env) {
  var state, labelEnd, pos, max, label, title;

  if (str.charCodeAt(0) !== 0x2A
  /* * */
  ) {
      return -1;
    }

  if (str.charCodeAt(1) !== 0x5B
  /* [ */
  ) {
      return -1;
    }

  if (str.indexOf(']:') === -1) {
    return -1;
  }

  state = new StateInline(str, parserInline, options, env, []);
  labelEnd = parseLinkLabel(state, 1);

  if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A
  /* : */
  ) {
      return -1;
    }

  max = state.posMax; // abbr title is always one line, so looking for ending "\n" here

  for (pos = labelEnd + 2; pos < max; pos++) {
    if (state.src.charCodeAt(pos) === 0x0A) {
      break;
    }
  }

  label = str.slice(2, labelEnd);
  title = str.slice(labelEnd + 2, pos).trim();

  if (title.length === 0) {
    return -1;
  }

  if (!env.abbreviations) {
    env.abbreviations = {};
  } // prepend ':' to avoid conflict with Object.prototype members


  if (typeof env.abbreviations[':' + label] === 'undefined') {
    env.abbreviations[':' + label] = title;
  }

  return pos;
}

function abbr(state) {
  var tokens = state.tokens,
      i,
      l,
      content,
      pos;

  if (state.inlineMode) {
    return;
  } // Parse inlines


  for (i = 1, l = tokens.length - 1; i < l; i++) {
    if (tokens[i - 1].type === 'paragraph_open' && tokens[i].type === 'inline' && tokens[i + 1].type === 'paragraph_close') {
      content = tokens[i].content;

      while (content.length) {
        pos = parseAbbr(content, state.inline, state.options, state.env);

        if (pos < 0) {
          break;
        }

        content = content.slice(pos).trim();
      }

      tokens[i].content = content;

      if (!content.length) {
        tokens[i - 1].tight = true;
        tokens[i + 1].tight = true;
      }
    }
  }
}

function normalizeLink(url) {
  var normalized = replaceEntities(url); // We shouldn't care about the result of malformed URIs,
  // and should not throw an exception.

  try {
    normalized = decodeURI(normalized);
  } catch (err) {}

  return encodeURI(normalized);
}
/**
 * Parse link destination
 *
 *   - on success it returns a string and updates state.pos;
 *   - on failure it returns null
 *
 * @param  {Object} state
 * @param  {Number} pos
 * @api private
 */


function parseLinkDestination(state, pos) {
  var code,
      level,
      link,
      start = pos,
      max = state.posMax;

  if (state.src.charCodeAt(pos) === 0x3C
  /* < */
  ) {
      pos++;

      while (pos < max) {
        code = state.src.charCodeAt(pos);

        if (code === 0x0A
        /* \n */
        ) {
            return false;
          }

        if (code === 0x3E
        /* > */
        ) {
            link = normalizeLink(unescapeMd(state.src.slice(start + 1, pos)));

            if (!state.parser.validateLink(link)) {
              return false;
            }

            state.pos = pos + 1;
            state.linkContent = link;
            return true;
          }

        if (code === 0x5C
        /* \ */
        && pos + 1 < max) {
          pos += 2;
          continue;
        }

        pos++;
      } // no closing '>'


      return false;
    } // this should be ... } else { ... branch


  level = 0;

  while (pos < max) {
    code = state.src.charCodeAt(pos);

    if (code === 0x20) {
      break;
    } // ascii control chars


    if (code < 0x20 || code === 0x7F) {
      break;
    }

    if (code === 0x5C
    /* \ */
    && pos + 1 < max) {
      pos += 2;
      continue;
    }

    if (code === 0x28
    /* ( */
    ) {
        level++;

        if (level > 1) {
          break;
        }
      }

    if (code === 0x29
    /* ) */
    ) {
        level--;

        if (level < 0) {
          break;
        }
      }

    pos++;
  }

  if (start === pos) {
    return false;
  }

  link = unescapeMd(state.src.slice(start, pos));

  if (!state.parser.validateLink(link)) {
    return false;
  }

  state.linkContent = link;
  state.pos = pos;
  return true;
}
/**
 * Parse link title
 *
 *   - on success it returns a string and updates state.pos;
 *   - on failure it returns null
 *
 * @param  {Object} state
 * @param  {Number} pos
 * @api private
 */


function parseLinkTitle(state, pos) {
  var code,
      start = pos,
      max = state.posMax,
      marker = state.src.charCodeAt(pos);

  if (marker !== 0x22
  /* " */
  && marker !== 0x27
  /* ' */
  && marker !== 0x28
  /* ( */
  ) {
      return false;
    }

  pos++; // if opening marker is "(", switch it to closing marker ")"

  if (marker === 0x28) {
    marker = 0x29;
  }

  while (pos < max) {
    code = state.src.charCodeAt(pos);

    if (code === marker) {
      state.pos = pos + 1;
      state.linkContent = unescapeMd(state.src.slice(start + 1, pos));
      return true;
    }

    if (code === 0x5C
    /* \ */
    && pos + 1 < max) {
      pos += 2;
      continue;
    }

    pos++;
  }

  return false;
}

function normalizeReference(str) {
  // use .toUpperCase() instead of .toLowerCase()
  // here to avoid a conflict with Object.prototype
  // members (most notably, `__proto__`)
  return str.trim().replace(/\s+/g, ' ').toUpperCase();
}

function parseReference(str, parser, options, env) {
  var state, labelEnd, pos, max, code, start, href, title, label;

  if (str.charCodeAt(0) !== 0x5B
  /* [ */
  ) {
      return -1;
    }

  if (str.indexOf(']:') === -1) {
    return -1;
  }

  state = new StateInline(str, parser, options, env, []);
  labelEnd = parseLinkLabel(state, 0);

  if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A
  /* : */
  ) {
      return -1;
    }

  max = state.posMax; // [label]:   destination   'title'
  //         ^^^ skip optional whitespace here

  for (pos = labelEnd + 2; pos < max; pos++) {
    code = state.src.charCodeAt(pos);

    if (code !== 0x20 && code !== 0x0A) {
      break;
    }
  } // [label]:   destination   'title'
  //            ^^^^^^^^^^^ parse this


  if (!parseLinkDestination(state, pos)) {
    return -1;
  }

  href = state.linkContent;
  pos = state.pos; // [label]:   destination   'title'
  //                       ^^^ skipping those spaces

  start = pos;

  for (pos = pos + 1; pos < max; pos++) {
    code = state.src.charCodeAt(pos);

    if (code !== 0x20 && code !== 0x0A) {
      break;
    }
  } // [label]:   destination   'title'
  //                          ^^^^^^^ parse this


  if (pos < max && start !== pos && parseLinkTitle(state, pos)) {
    title = state.linkContent;
    pos = state.pos;
  } else {
    title = '';
    pos = start;
  } // ensure that the end of the line is empty


  while (pos < max && state.src.charCodeAt(pos) === 0x20
  /* space */
  ) {
    pos++;
  }

  if (pos < max && state.src.charCodeAt(pos) !== 0x0A) {
    return -1;
  }

  label = normalizeReference(str.slice(1, labelEnd));

  if (typeof env.references[label] === 'undefined') {
    env.references[label] = {
      title: title,
      href: href
    };
  }

  return pos;
}

function references(state) {
  var tokens = state.tokens,
      i,
      l,
      content,
      pos;
  state.env.references = state.env.references || {};

  if (state.inlineMode) {
    return;
  } // Scan definitions in paragraph inlines


  for (i = 1, l = tokens.length - 1; i < l; i++) {
    if (tokens[i].type === 'inline' && tokens[i - 1].type === 'paragraph_open' && tokens[i + 1].type === 'paragraph_close') {
      content = tokens[i].content;

      while (content.length) {
        pos = parseReference(content, state.inline, state.options, state.env);

        if (pos < 0) {
          break;
        }

        content = content.slice(pos).trim();
      }

      tokens[i].content = content;

      if (!content.length) {
        tokens[i - 1].tight = true;
        tokens[i + 1].tight = true;
      }
    }
  }
}

function inline(state) {
  var tokens = state.tokens,
      tok,
      i,
      l; // Parse inlines

  for (i = 0, l = tokens.length; i < l; i++) {
    tok = tokens[i];

    if (tok.type === 'inline') {
      state.inline.parse(tok.content, state.options, state.env, tok.children);
    }
  }
}

function footnote_block(state) {
  var i,
      l,
      j,
      t,
      lastParagraph,
      list,
      tokens,
      current,
      currentLabel,
      level = 0,
      insideRef = false,
      refTokens = {};

  if (!state.env.footnotes) {
    return;
  }

  state.tokens = state.tokens.filter(function (tok) {
    if (tok.type === 'footnote_reference_open') {
      insideRef = true;
      current = [];
      currentLabel = tok.label;
      return false;
    }

    if (tok.type === 'footnote_reference_close') {
      insideRef = false; // prepend ':' to avoid conflict with Object.prototype members

      refTokens[':' + currentLabel] = current;
      return false;
    }

    if (insideRef) {
      current.push(tok);
    }

    return !insideRef;
  });

  if (!state.env.footnotes.list) {
    return;
  }

  list = state.env.footnotes.list;
  state.tokens.push({
    type: 'footnote_block_open',
    level: level++
  });

  for (i = 0, l = list.length; i < l; i++) {
    state.tokens.push({
      type: 'footnote_open',
      id: i,
      level: level++
    });

    if (list[i].tokens) {
      tokens = [];
      tokens.push({
        type: 'paragraph_open',
        tight: false,
        level: level++
      });
      tokens.push({
        type: 'inline',
        content: '',
        level: level,
        children: list[i].tokens
      });
      tokens.push({
        type: 'paragraph_close',
        tight: false,
        level: --level
      });
    } else if (list[i].label) {
      tokens = refTokens[':' + list[i].label];
    }

    state.tokens = state.tokens.concat(tokens);

    if (state.tokens[state.tokens.length - 1].type === 'paragraph_close') {
      lastParagraph = state.tokens.pop();
    } else {
      lastParagraph = null;
    }

    t = list[i].count > 0 ? list[i].count : 1;

    for (j = 0; j < t; j++) {
      state.tokens.push({
        type: 'footnote_anchor',
        id: i,
        subId: j,
        level: level
      });
    }

    if (lastParagraph) {
      state.tokens.push(lastParagraph);
    }

    state.tokens.push({
      type: 'footnote_close',
      level: --level
    });
  }

  state.tokens.push({
    type: 'footnote_block_close',
    level: --level
  });
} // Enclose abbreviations in <abbr> tags
//


var PUNCT_CHARS = ' \n()[]\'".,!?-'; // from Google closure library
// http://closure-library.googlecode.com/git-history/docs/local_closure_goog_string_string.js.source.html#line1021

function regEscape(s) {
  return s.replace(/([-()\[\]{}+?*.$\^|,:#<!\\])/g, '\\$1');
}

function abbr2(state) {
  var i,
      j,
      l,
      tokens,
      token,
      text,
      nodes,
      pos,
      level,
      reg,
      m,
      regText,
      blockTokens = state.tokens;

  if (!state.env.abbreviations) {
    return;
  }

  if (!state.env.abbrRegExp) {
    regText = '(^|[' + PUNCT_CHARS.split('').map(regEscape).join('') + '])' + '(' + Object.keys(state.env.abbreviations).map(function (x) {
      return x.substr(1);
    }).sort(function (a, b) {
      return b.length - a.length;
    }).map(regEscape).join('|') + ')' + '($|[' + PUNCT_CHARS.split('').map(regEscape).join('') + '])';
    state.env.abbrRegExp = new RegExp(regText, 'g');
  }

  reg = state.env.abbrRegExp;

  for (j = 0, l = blockTokens.length; j < l; j++) {
    if (blockTokens[j].type !== 'inline') {
      continue;
    }

    tokens = blockTokens[j].children; // We scan from the end, to keep position when new tags added.

    for (i = tokens.length - 1; i >= 0; i--) {
      token = tokens[i];

      if (token.type !== 'text') {
        continue;
      }

      pos = 0;
      text = token.content;
      reg.lastIndex = 0;
      level = token.level;
      nodes = [];

      while (m = reg.exec(text)) {
        if (reg.lastIndex > pos) {
          nodes.push({
            type: 'text',
            content: text.slice(pos, m.index + m[1].length),
            level: level
          });
        }

        nodes.push({
          type: 'abbr_open',
          title: state.env.abbreviations[':' + m[2]],
          level: level++
        });
        nodes.push({
          type: 'text',
          content: m[2],
          level: level
        });
        nodes.push({
          type: 'abbr_close',
          level: --level
        });
        pos = reg.lastIndex - m[3].length;
      }

      if (!nodes.length) {
        continue;
      }

      if (pos < text.length) {
        nodes.push({
          type: 'text',
          content: text.slice(pos),
          level: level
        });
      } // replace current node


      blockTokens[j].children = tokens = [].concat(tokens.slice(0, i), nodes, tokens.slice(i + 1));
    }
  }
} // Simple typographical replacements
//
// TODO:
// - fractionals 1/2, 1/4, 3/4 -> ½, ¼, ¾
// - miltiplication 2 x 4 -> 2 × 4


var RARE_RE = /\+-|\.\.|\?\?\?\?|!!!!|,,|--/;
var SCOPED_ABBR_RE = /\((c|tm|r|p)\)/ig;
var SCOPED_ABBR = {
  'c': '©',
  'r': '®',
  'p': '§',
  'tm': '™'
};

function replaceScopedAbbr(str) {
  if (str.indexOf('(') < 0) {
    return str;
  }

  return str.replace(SCOPED_ABBR_RE, function (match, name) {
    return SCOPED_ABBR[name.toLowerCase()];
  });
}

function replace(state) {
  var i, token, text, inlineTokens, blkIdx;

  if (!state.options.typographer) {
    return;
  }

  for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {
    if (state.tokens[blkIdx].type !== 'inline') {
      continue;
    }

    inlineTokens = state.tokens[blkIdx].children;

    for (i = inlineTokens.length - 1; i >= 0; i--) {
      token = inlineTokens[i];

      if (token.type === 'text') {
        text = token.content;
        text = replaceScopedAbbr(text);

        if (RARE_RE.test(text)) {
          text = text.replace(/\+-/g, '±') // .., ..., ....... -> …
          // but ?..... & !..... -> ?.. & !..
          .replace(/\.{2,}/g, '…').replace(/([?!])…/g, '$1..').replace(/([?!]){4,}/g, '$1$1$1').replace(/,{2,}/g, ',') // em-dash
          .replace(/(^|[^-])---([^-]|$)/mg, "$1\u2014$2") // en-dash
          .replace(/(^|\s)--(\s|$)/mg, "$1\u2013$2").replace(/(^|[^-\s])--([^-\s]|$)/mg, "$1\u2013$2");
        }

        token.content = text;
      }
    }
  }
} // Convert straight quotation marks to typographic ones
//


var QUOTE_TEST_RE = /['"]/;
var QUOTE_RE = /['"]/g;
var PUNCT_RE = /[-\s()\[\]]/;
var APOSTROPHE = '’'; // This function returns true if the character at `pos`
// could be inside a word.

function isLetter(str, pos) {
  if (pos < 0 || pos >= str.length) {
    return false;
  }

  return !PUNCT_RE.test(str[pos]);
}

function replaceAt(str, index, ch) {
  return str.substr(0, index) + ch + str.substr(index + 1);
}

function smartquotes(state) {
  /*eslint max-depth:0*/
  var i, token, text, t, pos, max, thisLevel, lastSpace, nextSpace, item, canOpen, canClose, j, isSingle, blkIdx, tokens, stack;

  if (!state.options.typographer) {
    return;
  }

  stack = [];

  for (blkIdx = state.tokens.length - 1; blkIdx >= 0; blkIdx--) {
    if (state.tokens[blkIdx].type !== 'inline') {
      continue;
    }

    tokens = state.tokens[blkIdx].children;
    stack.length = 0;

    for (i = 0; i < tokens.length; i++) {
      token = tokens[i];

      if (token.type !== 'text' || QUOTE_TEST_RE.test(token.text)) {
        continue;
      }

      thisLevel = tokens[i].level;

      for (j = stack.length - 1; j >= 0; j--) {
        if (stack[j].level <= thisLevel) {
          break;
        }
      }

      stack.length = j + 1;
      text = token.content;
      pos = 0;
      max = text.length;
      /*eslint no-labels:0,block-scoped-var:0*/

      OUTER: while (pos < max) {
        QUOTE_RE.lastIndex = pos;
        t = QUOTE_RE.exec(text);

        if (!t) {
          break;
        }

        lastSpace = !isLetter(text, t.index - 1);
        pos = t.index + 1;
        isSingle = t[0] === "'";
        nextSpace = !isLetter(text, pos);

        if (!nextSpace && !lastSpace) {
          // middle of word
          if (isSingle) {
            token.content = replaceAt(token.content, t.index, APOSTROPHE);
          }

          continue;
        }

        canOpen = !nextSpace;
        canClose = !lastSpace;

        if (canClose) {
          // this could be a closing quote, rewind the stack to get a match
          for (j = stack.length - 1; j >= 0; j--) {
            item = stack[j];

            if (stack[j].level < thisLevel) {
              break;
            }

            if (item.single === isSingle && stack[j].level === thisLevel) {
              item = stack[j];

              if (isSingle) {
                tokens[item.token].content = replaceAt(tokens[item.token].content, item.pos, state.options.quotes[2]);
                token.content = replaceAt(token.content, t.index, state.options.quotes[3]);
              } else {
                tokens[item.token].content = replaceAt(tokens[item.token].content, item.pos, state.options.quotes[0]);
                token.content = replaceAt(token.content, t.index, state.options.quotes[1]);
              }

              stack.length = j;
              continue OUTER;
            }
          }
        }

        if (canOpen) {
          stack.push({
            token: i,
            pos: t.index,
            single: isSingle,
            level: thisLevel
          });
        } else if (canClose && isSingle) {
          token.content = replaceAt(token.content, t.index, APOSTROPHE);
        }
      }
    }
  }
}
/**
 * Core parser `rules`
 */


var _rules = [['block', block], ['abbr', abbr], ['references', references], ['inline', inline], ['footnote_tail', footnote_block], ['abbr2', abbr2], ['replacements', replace], ['smartquotes', smartquotes]];
/**
 * Class for top level (`core`) parser rules
 *
 * @api private
 */

function Core() {
  this.options = {};
  this.ruler = new Ruler();

  for (var i = 0; i < _rules.length; i++) {
    this.ruler.push(_rules[i][0], _rules[i][1]);
  }
}
/**
 * Process rules with the given `state`
 *
 * @param  {Object} `state`
 * @api private
 */


Core.prototype.process = function (state) {
  var i, l, rules;
  rules = this.ruler.getRules('');

  for (i = 0, l = rules.length; i < l; i++) {
    rules[i](state);
  }
}; // Parser state class


function StateBlock(src, parser, options, env, tokens) {
  var ch, s, start, pos, len, indent, indent_found;
  this.src = src; // Shortcuts to simplify nested calls

  this.parser = parser;
  this.options = options;
  this.env = env; //
  // Internal state vartiables
  //

  this.tokens = tokens;
  this.bMarks = []; // line begin offsets for fast jumps

  this.eMarks = []; // line end offsets for fast jumps

  this.tShift = []; // indent for each line
  // block parser variables

  this.blkIndent = 0; // required block content indent
  // (for example, if we are in list)

  this.line = 0; // line index in src

  this.lineMax = 0; // lines count

  this.tight = false; // loose/tight mode for lists

  this.parentType = 'root'; // if `list`, block parser stops on two newlines

  this.ddIndent = -1; // indent of the current dd block (-1 if there isn't any)

  this.level = 0; // renderer

  this.result = ''; // Create caches
  // Generate markers.

  s = this.src;
  indent = 0;
  indent_found = false;

  for (start = pos = indent = 0, len = s.length; pos < len; pos++) {
    ch = s.charCodeAt(pos);

    if (!indent_found) {
      if (ch === 0x20
      /* space */
      ) {
          indent++;
          continue;
        } else {
        indent_found = true;
      }
    }

    if (ch === 0x0A || pos === len - 1) {
      if (ch !== 0x0A) {
        pos++;
      }

      this.bMarks.push(start);
      this.eMarks.push(pos);
      this.tShift.push(indent);
      indent_found = false;
      indent = 0;
      start = pos + 1;
    }
  } // Push fake entry to simplify cache bounds checks


  this.bMarks.push(s.length);
  this.eMarks.push(s.length);
  this.tShift.push(0);
  this.lineMax = this.bMarks.length - 1; // don't count last fake line
}

StateBlock.prototype.isEmpty = function isEmpty(line) {
  return this.bMarks[line] + this.tShift[line] >= this.eMarks[line];
};

StateBlock.prototype.skipEmptyLines = function skipEmptyLines(from) {
  for (var max = this.lineMax; from < max; from++) {
    if (this.bMarks[from] + this.tShift[from] < this.eMarks[from]) {
      break;
    }
  }

  return from;
}; // Skip spaces from given position.


StateBlock.prototype.skipSpaces = function skipSpaces(pos) {
  for (var max = this.src.length; pos < max; pos++) {
    if (this.src.charCodeAt(pos) !== 0x20
    /* space */
    ) {
        break;
      }
  }

  return pos;
}; // Skip char codes from given position


StateBlock.prototype.skipChars = function skipChars(pos, code) {
  for (var max = this.src.length; pos < max; pos++) {
    if (this.src.charCodeAt(pos) !== code) {
      break;
    }
  }

  return pos;
}; // Skip char codes reverse from given position - 1


StateBlock.prototype.skipCharsBack = function skipCharsBack(pos, code, min) {
  if (pos <= min) {
    return pos;
  }

  while (pos > min) {
    if (code !== this.src.charCodeAt(--pos)) {
      return pos + 1;
    }
  }

  return pos;
}; // cut lines range from source.


StateBlock.prototype.getLines = function getLines(begin, end, indent, keepLastLF) {
  var i,
      first,
      last,
      queue,
      shift,
      line = begin;

  if (begin >= end) {
    return '';
  } // Opt: don't use push queue for single line;


  if (line + 1 === end) {
    first = this.bMarks[line] + Math.min(this.tShift[line], indent);
    last = keepLastLF ? this.eMarks[line] + 1 : this.eMarks[line];
    return this.src.slice(first, last);
  }

  queue = new Array(end - begin);

  for (i = 0; line < end; line++, i++) {
    shift = this.tShift[line];

    if (shift > indent) {
      shift = indent;
    }

    if (shift < 0) {
      shift = 0;
    }

    first = this.bMarks[line] + shift;

    if (line + 1 < end || keepLastLF) {
      // No need for bounds check because we have fake entry on tail.
      last = this.eMarks[line] + 1;
    } else {
      last = this.eMarks[line];
    }

    queue[i] = this.src.slice(first, last);
  }

  return queue.join('');
}; // Code block (4 spaces padded)


function code(state, startLine, endLine
/*, silent*/
) {
  var nextLine, last;

  if (state.tShift[startLine] - state.blkIndent < 4) {
    return false;
  }

  last = nextLine = startLine + 1;

  while (nextLine < endLine) {
    if (state.isEmpty(nextLine)) {
      nextLine++;
      continue;
    }

    if (state.tShift[nextLine] - state.blkIndent >= 4) {
      nextLine++;
      last = nextLine;
      continue;
    }

    break;
  }

  state.line = nextLine;
  state.tokens.push({
    type: 'code',
    content: state.getLines(startLine, last, 4 + state.blkIndent, true),
    block: true,
    lines: [startLine, state.line],
    level: state.level
  });
  return true;
} // fences (``` lang, ~~~ lang)


function fences(state, startLine, endLine, silent) {
  var marker,
      len,
      params,
      nextLine,
      mem,
      haveEndMarker = false,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  if (pos + 3 > max) {
    return false;
  }

  marker = state.src.charCodeAt(pos);

  if (marker !== 0x7E
  /* ~ */
  && marker !== 0x60
  /* ` */
  ) {
      return false;
    } // scan marker length


  mem = pos;
  pos = state.skipChars(pos, marker);
  len = pos - mem;

  if (len < 3) {
    return false;
  }

  params = state.src.slice(pos, max).trim();

  if (params.indexOf('`') >= 0) {
    return false;
  } // Since start is found, we can report success here in validation mode


  if (silent) {
    return true;
  } // search end of block


  nextLine = startLine;

  for (;;) {
    nextLine++;

    if (nextLine >= endLine) {
      // unclosed block should be autoclosed by end of document.
      // also block seems to be autoclosed by end of parent
      break;
    }

    pos = mem = state.bMarks[nextLine] + state.tShift[nextLine];
    max = state.eMarks[nextLine];

    if (pos < max && state.tShift[nextLine] < state.blkIndent) {
      // non-empty line with negative indent should stop the list:
      // - ```
      //  test
      break;
    }

    if (state.src.charCodeAt(pos) !== marker) {
      continue;
    }

    if (state.tShift[nextLine] - state.blkIndent >= 4) {
      // closing fence should be indented less than 4 spaces
      continue;
    }

    pos = state.skipChars(pos, marker); // closing code fence must be at least as long as the opening one

    if (pos - mem < len) {
      continue;
    } // make sure tail has spaces only


    pos = state.skipSpaces(pos);

    if (pos < max) {
      continue;
    }

    haveEndMarker = true; // found!

    break;
  } // If a fence has heading spaces, they should be removed from its inner block


  len = state.tShift[startLine];
  state.line = nextLine + (haveEndMarker ? 1 : 0);
  state.tokens.push({
    type: 'fence',
    params: params,
    content: state.getLines(startLine + 1, nextLine, len, true),
    lines: [startLine, state.line],
    level: state.level
  });
  return true;
} // Block quotes


function blockquote(state, startLine, endLine, silent) {
  var nextLine,
      lastLineEmpty,
      oldTShift,
      oldBMarks,
      oldIndent,
      oldParentType,
      lines,
      terminatorRules,
      i,
      l,
      terminate,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  if (pos > max) {
    return false;
  } // check the block quote marker


  if (state.src.charCodeAt(pos++) !== 0x3E
  /* > */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  } // we know that it's going to be a valid blockquote,
  // so no point trying to find the end of it in silent mode


  if (silent) {
    return true;
  } // skip one optional space after '>'


  if (state.src.charCodeAt(pos) === 0x20) {
    pos++;
  }

  oldIndent = state.blkIndent;
  state.blkIndent = 0;
  oldBMarks = [state.bMarks[startLine]];
  state.bMarks[startLine] = pos; // check if we have an empty blockquote

  pos = pos < max ? state.skipSpaces(pos) : pos;
  lastLineEmpty = pos >= max;
  oldTShift = [state.tShift[startLine]];
  state.tShift[startLine] = pos - state.bMarks[startLine];
  terminatorRules = state.parser.ruler.getRules('blockquote'); // Search the end of the block
  //
  // Block ends with either:
  //  1. an empty line outside:
  //     ```
  //     > test
  //
  //     ```
  //  2. an empty line inside:
  //     ```
  //     >
  //     test
  //     ```
  //  3. another tag
  //     ```
  //     > test
  //      - - -
  //     ```

  for (nextLine = startLine + 1; nextLine < endLine; nextLine++) {
    pos = state.bMarks[nextLine] + state.tShift[nextLine];
    max = state.eMarks[nextLine];

    if (pos >= max) {
      // Case 1: line is not inside the blockquote, and this line is empty.
      break;
    }

    if (state.src.charCodeAt(pos++) === 0x3E
    /* > */
    ) {
        // This line is inside the blockquote.
        // skip one optional space after '>'
        if (state.src.charCodeAt(pos) === 0x20) {
          pos++;
        }

        oldBMarks.push(state.bMarks[nextLine]);
        state.bMarks[nextLine] = pos;
        pos = pos < max ? state.skipSpaces(pos) : pos;
        lastLineEmpty = pos >= max;
        oldTShift.push(state.tShift[nextLine]);
        state.tShift[nextLine] = pos - state.bMarks[nextLine];
        continue;
      } // Case 2: line is not inside the blockquote, and the last line was empty.


    if (lastLineEmpty) {
      break;
    } // Case 3: another tag found.


    terminate = false;

    for (i = 0, l = terminatorRules.length; i < l; i++) {
      if (terminatorRules[i](state, nextLine, endLine, true)) {
        terminate = true;
        break;
      }
    }

    if (terminate) {
      break;
    }

    oldBMarks.push(state.bMarks[nextLine]);
    oldTShift.push(state.tShift[nextLine]); // A negative number means that this is a paragraph continuation;
    //
    // Any negative number will do the job here, but it's better for it
    // to be large enough to make any bugs obvious.

    state.tShift[nextLine] = -1337;
  }

  oldParentType = state.parentType;
  state.parentType = 'blockquote';
  state.tokens.push({
    type: 'blockquote_open',
    lines: lines = [startLine, 0],
    level: state.level++
  });
  state.parser.tokenize(state, startLine, nextLine);
  state.tokens.push({
    type: 'blockquote_close',
    level: --state.level
  });
  state.parentType = oldParentType;
  lines[1] = state.line; // Restore original tShift; this might not be necessary since the parser
  // has already been here, but just to make sure we can do that.

  for (i = 0; i < oldTShift.length; i++) {
    state.bMarks[i + startLine] = oldBMarks[i];
    state.tShift[i + startLine] = oldTShift[i];
  }

  state.blkIndent = oldIndent;
  return true;
} // Horizontal rule


function hr(state, startLine, endLine, silent) {
  var marker,
      cnt,
      ch,
      pos = state.bMarks[startLine],
      max = state.eMarks[startLine];
  pos += state.tShift[startLine];

  if (pos > max) {
    return false;
  }

  marker = state.src.charCodeAt(pos++); // Check hr marker

  if (marker !== 0x2A
  /* * */
  && marker !== 0x2D
  /* - */
  && marker !== 0x5F
  /* _ */
  ) {
      return false;
    } // markers can be mixed with spaces, but there should be at least 3 one


  cnt = 1;

  while (pos < max) {
    ch = state.src.charCodeAt(pos++);

    if (ch !== marker && ch !== 0x20
    /* space */
    ) {
        return false;
      }

    if (ch === marker) {
      cnt++;
    }
  }

  if (cnt < 3) {
    return false;
  }

  if (silent) {
    return true;
  }

  state.line = startLine + 1;
  state.tokens.push({
    type: 'hr',
    lines: [startLine, state.line],
    level: state.level
  });
  return true;
} // Lists
// Search `[-+*][\n ]`, returns next pos arter marker on success
// or -1 on fail.


function skipBulletListMarker(state, startLine) {
  var marker, pos, max;
  pos = state.bMarks[startLine] + state.tShift[startLine];
  max = state.eMarks[startLine];

  if (pos >= max) {
    return -1;
  }

  marker = state.src.charCodeAt(pos++); // Check bullet

  if (marker !== 0x2A
  /* * */
  && marker !== 0x2D
  /* - */
  && marker !== 0x2B
  /* + */
  ) {
      return -1;
    }

  if (pos < max && state.src.charCodeAt(pos) !== 0x20) {
    // " 1.test " - is not a list item
    return -1;
  }

  return pos;
} // Search `\d+[.)][\n ]`, returns next pos arter marker on success
// or -1 on fail.


function skipOrderedListMarker(state, startLine) {
  var ch,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  if (pos + 1 >= max) {
    return -1;
  }

  ch = state.src.charCodeAt(pos++);

  if (ch < 0x30
  /* 0 */
  || ch > 0x39
  /* 9 */
  ) {
      return -1;
    }

  for (;;) {
    // EOL -> fail
    if (pos >= max) {
      return -1;
    }

    ch = state.src.charCodeAt(pos++);

    if (ch >= 0x30
    /* 0 */
    && ch <= 0x39
    /* 9 */
    ) {
        continue;
      } // found valid marker


    if (ch === 0x29
    /* ) */
    || ch === 0x2e
    /* . */
    ) {
        break;
      }

    return -1;
  }

  if (pos < max && state.src.charCodeAt(pos) !== 0x20
  /* space */
  ) {
      // " 1.test " - is not a list item
      return -1;
    }

  return pos;
}

function markTightParagraphs(state, idx) {
  var i,
      l,
      level = state.level + 2;

  for (i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
    if (state.tokens[i].level === level && state.tokens[i].type === 'paragraph_open') {
      state.tokens[i + 2].tight = true;
      state.tokens[i].tight = true;
      i += 2;
    }
  }
}

function list(state, startLine, endLine, silent) {
  var nextLine,
      indent,
      oldTShift,
      oldIndent,
      oldTight,
      oldParentType,
      start,
      posAfterMarker,
      max,
      indentAfterMarker,
      markerValue,
      markerCharCode,
      isOrdered,
      contentStart,
      listTokIdx,
      prevEmptyEnd,
      listLines,
      itemLines,
      tight = true,
      terminatorRules,
      i,
      l,
      terminate; // Detect list type and position after marker

  if ((posAfterMarker = skipOrderedListMarker(state, startLine)) >= 0) {
    isOrdered = true;
  } else if ((posAfterMarker = skipBulletListMarker(state, startLine)) >= 0) {
    isOrdered = false;
  } else {
    return false;
  }

  if (state.level >= state.options.maxNesting) {
    return false;
  } // We should terminate list on style change. Remember first one to compare.


  markerCharCode = state.src.charCodeAt(posAfterMarker - 1); // For validation mode we can terminate immediately

  if (silent) {
    return true;
  } // Start list


  listTokIdx = state.tokens.length;

  if (isOrdered) {
    start = state.bMarks[startLine] + state.tShift[startLine];
    markerValue = Number(state.src.substr(start, posAfterMarker - start - 1));
    state.tokens.push({
      type: 'ordered_list_open',
      order: markerValue,
      lines: listLines = [startLine, 0],
      level: state.level++
    });
  } else {
    state.tokens.push({
      type: 'bullet_list_open',
      lines: listLines = [startLine, 0],
      level: state.level++
    });
  } //
  // Iterate list items
  //


  nextLine = startLine;
  prevEmptyEnd = false;
  terminatorRules = state.parser.ruler.getRules('list');

  while (nextLine < endLine) {
    contentStart = state.skipSpaces(posAfterMarker);
    max = state.eMarks[nextLine];

    if (contentStart >= max) {
      // trimming space in "-    \n  3" case, indent is 1 here
      indentAfterMarker = 1;
    } else {
      indentAfterMarker = contentStart - posAfterMarker;
    } // If we have more than 4 spaces, the indent is 1
    // (the rest is just indented code block)


    if (indentAfterMarker > 4) {
      indentAfterMarker = 1;
    } // If indent is less than 1, assume that it's one, example:
    //  "-\n  test"


    if (indentAfterMarker < 1) {
      indentAfterMarker = 1;
    } // "  -  test"
    //  ^^^^^ - calculating total length of this thing


    indent = posAfterMarker - state.bMarks[nextLine] + indentAfterMarker; // Run subparser & write tokens

    state.tokens.push({
      type: 'list_item_open',
      lines: itemLines = [startLine, 0],
      level: state.level++
    });
    oldIndent = state.blkIndent;
    oldTight = state.tight;
    oldTShift = state.tShift[startLine];
    oldParentType = state.parentType;
    state.tShift[startLine] = contentStart - state.bMarks[startLine];
    state.blkIndent = indent;
    state.tight = true;
    state.parentType = 'list';
    state.parser.tokenize(state, startLine, endLine, true); // If any of list item is tight, mark list as tight

    if (!state.tight || prevEmptyEnd) {
      tight = false;
    } // Item become loose if finish with empty line,
    // but we should filter last element, because it means list finish


    prevEmptyEnd = state.line - startLine > 1 && state.isEmpty(state.line - 1);
    state.blkIndent = oldIndent;
    state.tShift[startLine] = oldTShift;
    state.tight = oldTight;
    state.parentType = oldParentType;
    state.tokens.push({
      type: 'list_item_close',
      level: --state.level
    });
    nextLine = startLine = state.line;
    itemLines[1] = nextLine;
    contentStart = state.bMarks[startLine];

    if (nextLine >= endLine) {
      break;
    }

    if (state.isEmpty(nextLine)) {
      break;
    } //
    // Try to check if list is terminated or continued.
    //


    if (state.tShift[nextLine] < state.blkIndent) {
      break;
    } // fail if terminating block found


    terminate = false;

    for (i = 0, l = terminatorRules.length; i < l; i++) {
      if (terminatorRules[i](state, nextLine, endLine, true)) {
        terminate = true;
        break;
      }
    }

    if (terminate) {
      break;
    } // fail if list has another type


    if (isOrdered) {
      posAfterMarker = skipOrderedListMarker(state, nextLine);

      if (posAfterMarker < 0) {
        break;
      }
    } else {
      posAfterMarker = skipBulletListMarker(state, nextLine);

      if (posAfterMarker < 0) {
        break;
      }
    }

    if (markerCharCode !== state.src.charCodeAt(posAfterMarker - 1)) {
      break;
    }
  } // Finilize list


  state.tokens.push({
    type: isOrdered ? 'ordered_list_close' : 'bullet_list_close',
    level: --state.level
  });
  listLines[1] = nextLine;
  state.line = nextLine; // mark paragraphs tight if needed

  if (tight) {
    markTightParagraphs(state, listTokIdx);
  }

  return true;
} // Process footnote reference list


function footnote(state, startLine, endLine, silent) {
  var oldBMark,
      oldTShift,
      oldParentType,
      pos,
      label,
      start = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine]; // line should be at least 5 chars - "[^x]:"

  if (start + 4 > max) {
    return false;
  }

  if (state.src.charCodeAt(start) !== 0x5B
  /* [ */
  ) {
      return false;
    }

  if (state.src.charCodeAt(start + 1) !== 0x5E
  /* ^ */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  for (pos = start + 2; pos < max; pos++) {
    if (state.src.charCodeAt(pos) === 0x20) {
      return false;
    }

    if (state.src.charCodeAt(pos) === 0x5D
    /* ] */
    ) {
        break;
      }
  }

  if (pos === start + 2) {
    return false;
  } // no empty footnote labels


  if (pos + 1 >= max || state.src.charCodeAt(++pos) !== 0x3A
  /* : */
  ) {
      return false;
    }

  if (silent) {
    return true;
  }

  pos++;

  if (!state.env.footnotes) {
    state.env.footnotes = {};
  }

  if (!state.env.footnotes.refs) {
    state.env.footnotes.refs = {};
  }

  label = state.src.slice(start + 2, pos - 2);
  state.env.footnotes.refs[':' + label] = -1;
  state.tokens.push({
    type: 'footnote_reference_open',
    label: label,
    level: state.level++
  });
  oldBMark = state.bMarks[startLine];
  oldTShift = state.tShift[startLine];
  oldParentType = state.parentType;
  state.tShift[startLine] = state.skipSpaces(pos) - pos;
  state.bMarks[startLine] = pos;
  state.blkIndent += 4;
  state.parentType = 'footnote';

  if (state.tShift[startLine] < state.blkIndent) {
    state.tShift[startLine] += state.blkIndent;
    state.bMarks[startLine] -= state.blkIndent;
  }

  state.parser.tokenize(state, startLine, endLine, true);
  state.parentType = oldParentType;
  state.blkIndent -= 4;
  state.tShift[startLine] = oldTShift;
  state.bMarks[startLine] = oldBMark;
  state.tokens.push({
    type: 'footnote_reference_close',
    level: --state.level
  });
  return true;
} // heading (#, ##, ...)


function heading(state, startLine, endLine, silent) {
  var ch,
      level,
      tmp,
      pos = state.bMarks[startLine] + state.tShift[startLine],
      max = state.eMarks[startLine];

  if (pos >= max) {
    return false;
  }

  ch = state.src.charCodeAt(pos);

  if (ch !== 0x23
  /* # */
  || pos >= max) {
    return false;
  } // count heading level


  level = 1;
  ch = state.src.charCodeAt(++pos);

  while (ch === 0x23
  /* # */
  && pos < max && level <= 6) {
    level++;
    ch = state.src.charCodeAt(++pos);
  }

  if (level > 6 || pos < max && ch !== 0x20
  /* space */
  ) {
    return false;
  }

  if (silent) {
    return true;
  } // Let's cut tails like '    ###  ' from the end of string


  max = state.skipCharsBack(max, 0x20, pos); // space

  tmp = state.skipCharsBack(max, 0x23, pos); // #

  if (tmp > pos && state.src.charCodeAt(tmp - 1) === 0x20
  /* space */
  ) {
      max = tmp;
    }

  state.line = startLine + 1;
  state.tokens.push({
    type: 'heading_open',
    hLevel: level,
    lines: [startLine, state.line],
    level: state.level
  }); // only if header is not empty

  if (pos < max) {
    state.tokens.push({
      type: 'inline',
      content: state.src.slice(pos, max).trim(),
      level: state.level + 1,
      lines: [startLine, state.line],
      children: []
    });
  }

  state.tokens.push({
    type: 'heading_close',
    hLevel: level,
    level: state.level
  });
  return true;
} // lheading (---, ===)


function lheading(state, startLine, endLine
/*, silent*/
) {
  var marker,
      pos,
      max,
      next = startLine + 1;

  if (next >= endLine) {
    return false;
  }

  if (state.tShift[next] < state.blkIndent) {
    return false;
  } // Scan next line


  if (state.tShift[next] - state.blkIndent > 3) {
    return false;
  }

  pos = state.bMarks[next] + state.tShift[next];
  max = state.eMarks[next];

  if (pos >= max) {
    return false;
  }

  marker = state.src.charCodeAt(pos);

  if (marker !== 0x2D
  /* - */
  && marker !== 0x3D
  /* = */
  ) {
      return false;
    }

  pos = state.skipChars(pos, marker);
  pos = state.skipSpaces(pos);

  if (pos < max) {
    return false;
  }

  pos = state.bMarks[startLine] + state.tShift[startLine];
  state.line = next + 1;
  state.tokens.push({
    type: 'heading_open',
    hLevel: marker === 0x3D
    /* = */
    ? 1 : 2,
    lines: [startLine, state.line],
    level: state.level
  });
  state.tokens.push({
    type: 'inline',
    content: state.src.slice(pos, state.eMarks[startLine]).trim(),
    level: state.level + 1,
    lines: [startLine, state.line - 1],
    children: []
  });
  state.tokens.push({
    type: 'heading_close',
    hLevel: marker === 0x3D
    /* = */
    ? 1 : 2,
    level: state.level
  });
  return true;
} // List of valid html blocks names, accorting to commonmark spec
// http://jgm.github.io/CommonMark/spec.html#html-blocks


var html_blocks = {};
['article', 'aside', 'button', 'blockquote', 'body', 'canvas', 'caption', 'col', 'colgroup', 'dd', 'div', 'dl', 'dt', 'embed', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hgroup', 'hr', 'iframe', 'li', 'map', 'object', 'ol', 'output', 'p', 'pre', 'progress', 'script', 'section', 'style', 'table', 'tbody', 'td', 'textarea', 'tfoot', 'th', 'tr', 'thead', 'ul', 'video'].forEach(function (name) {
  html_blocks[name] = true;
}); // HTML block

var HTML_TAG_OPEN_RE = /^<([a-zA-Z]{1,15})[\s\/>]/;
var HTML_TAG_CLOSE_RE = /^<\/([a-zA-Z]{1,15})[\s>]/;

function isLetter$1(ch) {
  /*eslint no-bitwise:0*/
  var lc = ch | 0x20; // to lower case

  return lc >= 0x61
  /* a */
  && lc <= 0x7a
  /* z */
  ;
}

function htmlblock(state, startLine, endLine, silent) {
  var ch,
      match,
      nextLine,
      pos = state.bMarks[startLine],
      max = state.eMarks[startLine],
      shift = state.tShift[startLine];
  pos += shift;

  if (!state.options.html) {
    return false;
  }

  if (shift > 3 || pos + 2 >= max) {
    return false;
  }

  if (state.src.charCodeAt(pos) !== 0x3C
  /* < */
  ) {
      return false;
    }

  ch = state.src.charCodeAt(pos + 1);

  if (ch === 0x21
  /* ! */
  || ch === 0x3F
  /* ? */
  ) {
      // Directive start / comment start / processing instruction start
      if (silent) {
        return true;
      }
    } else if (ch === 0x2F
  /* / */
  || isLetter$1(ch)) {
    // Probably start or end of tag
    if (ch === 0x2F
    /* \ */
    ) {
        // closing tag
        match = state.src.slice(pos, max).match(HTML_TAG_CLOSE_RE);

        if (!match) {
          return false;
        }
      } else {
      // opening tag
      match = state.src.slice(pos, max).match(HTML_TAG_OPEN_RE);

      if (!match) {
        return false;
      }
    } // Make sure tag name is valid


    if (html_blocks[match[1].toLowerCase()] !== true) {
      return false;
    }

    if (silent) {
      return true;
    }
  } else {
    return false;
  } // If we are here - we detected HTML block.
  // Let's roll down till empty line (block end).


  nextLine = startLine + 1;

  while (nextLine < state.lineMax && !state.isEmpty(nextLine)) {
    nextLine++;
  }

  state.line = nextLine;
  state.tokens.push({
    type: 'htmlblock',
    level: state.level,
    lines: [startLine, state.line],
    content: state.getLines(startLine, nextLine, 0, true)
  });
  return true;
} // GFM table, non-standard


function getLine(state, line) {
  var pos = state.bMarks[line] + state.blkIndent,
      max = state.eMarks[line];
  return state.src.substr(pos, max - pos);
}

function table(state, startLine, endLine, silent) {
  var ch, lineText, pos, i, nextLine, rows, cell, aligns, t, tableLines, tbodyLines; // should have at least three lines

  if (startLine + 2 > endLine) {
    return false;
  }

  nextLine = startLine + 1;

  if (state.tShift[nextLine] < state.blkIndent) {
    return false;
  } // first character of the second line should be '|' or '-'


  pos = state.bMarks[nextLine] + state.tShift[nextLine];

  if (pos >= state.eMarks[nextLine]) {
    return false;
  }

  ch = state.src.charCodeAt(pos);

  if (ch !== 0x7C
  /* | */
  && ch !== 0x2D
  /* - */
  && ch !== 0x3A
  /* : */
  ) {
      return false;
    }

  lineText = getLine(state, startLine + 1);

  if (!/^[-:| ]+$/.test(lineText)) {
    return false;
  }

  rows = lineText.split('|');

  if (rows <= 2) {
    return false;
  }

  aligns = [];

  for (i = 0; i < rows.length; i++) {
    t = rows[i].trim();

    if (!t) {
      // allow empty columns before and after table, but not in between columns;
      // e.g. allow ` |---| `, disallow ` ---||--- `
      if (i === 0 || i === rows.length - 1) {
        continue;
      } else {
        return false;
      }
    }

    if (!/^:?-+:?$/.test(t)) {
      return false;
    }

    if (t.charCodeAt(t.length - 1) === 0x3A
    /* : */
    ) {
        aligns.push(t.charCodeAt(0) === 0x3A
        /* : */
        ? 'center' : 'right');
      } else if (t.charCodeAt(0) === 0x3A
    /* : */
    ) {
        aligns.push('left');
      } else {
      aligns.push('');
    }
  }

  lineText = getLine(state, startLine).trim();

  if (lineText.indexOf('|') === -1) {
    return false;
  }

  rows = lineText.replace(/^\||\|$/g, '').split('|');

  if (aligns.length !== rows.length) {
    return false;
  }

  if (silent) {
    return true;
  }

  state.tokens.push({
    type: 'table_open',
    lines: tableLines = [startLine, 0],
    level: state.level++
  });
  state.tokens.push({
    type: 'thead_open',
    lines: [startLine, startLine + 1],
    level: state.level++
  });
  state.tokens.push({
    type: 'tr_open',
    lines: [startLine, startLine + 1],
    level: state.level++
  });

  for (i = 0; i < rows.length; i++) {
    state.tokens.push({
      type: 'th_open',
      align: aligns[i],
      lines: [startLine, startLine + 1],
      level: state.level++
    });
    state.tokens.push({
      type: 'inline',
      content: rows[i].trim(),
      lines: [startLine, startLine + 1],
      level: state.level,
      children: []
    });
    state.tokens.push({
      type: 'th_close',
      level: --state.level
    });
  }

  state.tokens.push({
    type: 'tr_close',
    level: --state.level
  });
  state.tokens.push({
    type: 'thead_close',
    level: --state.level
  });
  state.tokens.push({
    type: 'tbody_open',
    lines: tbodyLines = [startLine + 2, 0],
    level: state.level++
  });

  for (nextLine = startLine + 2; nextLine < endLine; nextLine++) {
    if (state.tShift[nextLine] < state.blkIndent) {
      break;
    }

    lineText = getLine(state, nextLine).trim();

    if (lineText.indexOf('|') === -1) {
      break;
    }

    rows = lineText.replace(/^\||\|$/g, '').split('|');
    state.tokens.push({
      type: 'tr_open',
      level: state.level++
    });

    for (i = 0; i < rows.length; i++) {
      state.tokens.push({
        type: 'td_open',
        align: aligns[i],
        level: state.level++
      }); // 0x7c === '|'

      cell = rows[i].substring(rows[i].charCodeAt(0) === 0x7c ? 1 : 0, rows[i].charCodeAt(rows[i].length - 1) === 0x7c ? rows[i].length - 1 : rows[i].length).trim();
      state.tokens.push({
        type: 'inline',
        content: cell,
        level: state.level,
        children: []
      });
      state.tokens.push({
        type: 'td_close',
        level: --state.level
      });
    }

    state.tokens.push({
      type: 'tr_close',
      level: --state.level
    });
  }

  state.tokens.push({
    type: 'tbody_close',
    level: --state.level
  });
  state.tokens.push({
    type: 'table_close',
    level: --state.level
  });
  tableLines[1] = tbodyLines[1] = nextLine;
  state.line = nextLine;
  return true;
} // Definition lists
// Search `[:~][\n ]`, returns next pos after marker on success
// or -1 on fail.


function skipMarker(state, line) {
  var pos,
      marker,
      start = state.bMarks[line] + state.tShift[line],
      max = state.eMarks[line];

  if (start >= max) {
    return -1;
  } // Check bullet


  marker = state.src.charCodeAt(start++);

  if (marker !== 0x7E
  /* ~ */
  && marker !== 0x3A
  /* : */
  ) {
      return -1;
    }

  pos = state.skipSpaces(start); // require space after ":"

  if (start === pos) {
    return -1;
  } // no empty definitions, e.g. "  : "


  if (pos >= max) {
    return -1;
  }

  return pos;
}

function markTightParagraphs$1(state, idx) {
  var i,
      l,
      level = state.level + 2;

  for (i = idx + 2, l = state.tokens.length - 2; i < l; i++) {
    if (state.tokens[i].level === level && state.tokens[i].type === 'paragraph_open') {
      state.tokens[i + 2].tight = true;
      state.tokens[i].tight = true;
      i += 2;
    }
  }
}

function deflist(state, startLine, endLine, silent) {
  var contentStart, ddLine, dtLine, itemLines, listLines, listTokIdx, nextLine, oldIndent, oldDDIndent, oldParentType, oldTShift, oldTight, prevEmptyEnd, tight;

  if (silent) {
    // quirk: validation mode validates a dd block only, not a whole deflist
    if (state.ddIndent < 0) {
      return false;
    }

    return skipMarker(state, startLine) >= 0;
  }

  nextLine = startLine + 1;

  if (state.isEmpty(nextLine)) {
    if (++nextLine > endLine) {
      return false;
    }
  }

  if (state.tShift[nextLine] < state.blkIndent) {
    return false;
  }

  contentStart = skipMarker(state, nextLine);

  if (contentStart < 0) {
    return false;
  }

  if (state.level >= state.options.maxNesting) {
    return false;
  } // Start list


  listTokIdx = state.tokens.length;
  state.tokens.push({
    type: 'dl_open',
    lines: listLines = [startLine, 0],
    level: state.level++
  }); //
  // Iterate list items
  //

  dtLine = startLine;
  ddLine = nextLine; // One definition list can contain multiple DTs,
  // and one DT can be followed by multiple DDs.
  //
  // Thus, there is two loops here, and label is
  // needed to break out of the second one
  //

  /*eslint no-labels:0,block-scoped-var:0*/

  OUTER: for (;;) {
    tight = true;
    prevEmptyEnd = false;
    state.tokens.push({
      type: 'dt_open',
      lines: [dtLine, dtLine],
      level: state.level++
    });
    state.tokens.push({
      type: 'inline',
      content: state.getLines(dtLine, dtLine + 1, state.blkIndent, false).trim(),
      level: state.level + 1,
      lines: [dtLine, dtLine],
      children: []
    });
    state.tokens.push({
      type: 'dt_close',
      level: --state.level
    });

    for (;;) {
      state.tokens.push({
        type: 'dd_open',
        lines: itemLines = [nextLine, 0],
        level: state.level++
      });
      oldTight = state.tight;
      oldDDIndent = state.ddIndent;
      oldIndent = state.blkIndent;
      oldTShift = state.tShift[ddLine];
      oldParentType = state.parentType;
      state.blkIndent = state.ddIndent = state.tShift[ddLine] + 2;
      state.tShift[ddLine] = contentStart - state.bMarks[ddLine];
      state.tight = true;
      state.parentType = 'deflist';
      state.parser.tokenize(state, ddLine, endLine, true); // If any of list item is tight, mark list as tight

      if (!state.tight || prevEmptyEnd) {
        tight = false;
      } // Item become loose if finish with empty line,
      // but we should filter last element, because it means list finish


      prevEmptyEnd = state.line - ddLine > 1 && state.isEmpty(state.line - 1);
      state.tShift[ddLine] = oldTShift;
      state.tight = oldTight;
      state.parentType = oldParentType;
      state.blkIndent = oldIndent;
      state.ddIndent = oldDDIndent;
      state.tokens.push({
        type: 'dd_close',
        level: --state.level
      });
      itemLines[1] = nextLine = state.line;

      if (nextLine >= endLine) {
        break OUTER;
      }

      if (state.tShift[nextLine] < state.blkIndent) {
        break OUTER;
      }

      contentStart = skipMarker(state, nextLine);

      if (contentStart < 0) {
        break;
      }

      ddLine = nextLine; // go to the next loop iteration:
      // insert DD tag and repeat checking
    }

    if (nextLine >= endLine) {
      break;
    }

    dtLine = nextLine;

    if (state.isEmpty(dtLine)) {
      break;
    }

    if (state.tShift[dtLine] < state.blkIndent) {
      break;
    }

    ddLine = dtLine + 1;

    if (ddLine >= endLine) {
      break;
    }

    if (state.isEmpty(ddLine)) {
      ddLine++;
    }

    if (ddLine >= endLine) {
      break;
    }

    if (state.tShift[ddLine] < state.blkIndent) {
      break;
    }

    contentStart = skipMarker(state, ddLine);

    if (contentStart < 0) {
      break;
    } // go to the next loop iteration:
    // insert DT and DD tags and repeat checking

  } // Finilize list


  state.tokens.push({
    type: 'dl_close',
    level: --state.level
  });
  listLines[1] = nextLine;
  state.line = nextLine; // mark paragraphs tight if needed

  if (tight) {
    markTightParagraphs$1(state, listTokIdx);
  }

  return true;
} // Paragraph


function paragraph(state, startLine
/*, endLine*/
) {
  var endLine,
      content,
      terminate,
      i,
      l,
      nextLine = startLine + 1,
      terminatorRules;
  endLine = state.lineMax; // jump line-by-line until empty one or EOF

  if (nextLine < endLine && !state.isEmpty(nextLine)) {
    terminatorRules = state.parser.ruler.getRules('paragraph');

    for (; nextLine < endLine && !state.isEmpty(nextLine); nextLine++) {
      // this would be a code block normally, but after paragraph
      // it's considered a lazy continuation regardless of what's there
      if (state.tShift[nextLine] - state.blkIndent > 3) {
        continue;
      } // Some tags can terminate paragraph without empty line.


      terminate = false;

      for (i = 0, l = terminatorRules.length; i < l; i++) {
        if (terminatorRules[i](state, nextLine, endLine, true)) {
          terminate = true;
          break;
        }
      }

      if (terminate) {
        break;
      }
    }
  }

  content = state.getLines(startLine, nextLine, state.blkIndent, false).trim();
  state.line = nextLine;

  if (content.length) {
    state.tokens.push({
      type: 'paragraph_open',
      tight: false,
      lines: [startLine, state.line],
      level: state.level
    });
    state.tokens.push({
      type: 'inline',
      content: content,
      level: state.level + 1,
      lines: [startLine, state.line],
      children: []
    });
    state.tokens.push({
      type: 'paragraph_close',
      tight: false,
      level: state.level
    });
  }

  return true;
}
/**
 * Parser rules
 */


var _rules$1 = [['code', code], ['fences', fences, ['paragraph', 'blockquote', 'list']], ['blockquote', blockquote, ['paragraph', 'blockquote', 'list']], ['hr', hr, ['paragraph', 'blockquote', 'list']], ['list', list, ['paragraph', 'blockquote']], ['footnote', footnote, ['paragraph']], ['heading', heading, ['paragraph', 'blockquote']], ['lheading', lheading], ['htmlblock', htmlblock, ['paragraph', 'blockquote']], ['table', table, ['paragraph']], ['deflist', deflist, ['paragraph']], ['paragraph', paragraph]];
/**
 * Block Parser class
 *
 * @api private
 */

function ParserBlock() {
  this.ruler = new Ruler();

  for (var i = 0; i < _rules$1.length; i++) {
    this.ruler.push(_rules$1[i][0], _rules$1[i][1], {
      alt: (_rules$1[i][2] || []).slice()
    });
  }
}
/**
 * Generate tokens for the given input range.
 *
 * @param  {Object} `state` Has properties like `src`, `parser`, `options` etc
 * @param  {Number} `startLine`
 * @param  {Number} `endLine`
 * @api private
 */


ParserBlock.prototype.tokenize = function (state, startLine, endLine) {
  var rules = this.ruler.getRules('');
  var len = rules.length;
  var line = startLine;
  var hasEmptyLines = false;
  var ok, i;

  while (line < endLine) {
    state.line = line = state.skipEmptyLines(line);

    if (line >= endLine) {
      break;
    } // Termination condition for nested calls.
    // Nested calls currently used for blockquotes & lists


    if (state.tShift[line] < state.blkIndent) {
      break;
    } // Try all possible rules.
    // On success, rule should:
    //
    // - update `state.line`
    // - update `state.tokens`
    // - return true


    for (i = 0; i < len; i++) {
      ok = rules[i](state, line, endLine, false);

      if (ok) {
        break;
      }
    } // set state.tight iff we had an empty line before current tag
    // i.e. latest empty line should not count


    state.tight = !hasEmptyLines; // paragraph might "eat" one newline after it in nested lists

    if (state.isEmpty(state.line - 1)) {
      hasEmptyLines = true;
    }

    line = state.line;

    if (line < endLine && state.isEmpty(line)) {
      hasEmptyLines = true;
      line++; // two empty lines should stop the parser in list mode

      if (line < endLine && state.parentType === 'list' && state.isEmpty(line)) {
        break;
      }

      state.line = line;
    }
  }
};

var TABS_SCAN_RE = /[\n\t]/g;
var NEWLINES_RE = /\r[\n\u0085]|[\u2424\u2028\u0085]/g;
var SPACES_RE = /\u00a0/g;
/**
 * Tokenize the given `str`.
 *
 * @param  {String} `str` Source string
 * @param  {Object} `options`
 * @param  {Object} `env`
 * @param  {Array} `outTokens`
 * @api private
 */

ParserBlock.prototype.parse = function (str, options, env, outTokens) {
  var state,
      lineStart = 0,
      lastTabPos = 0;

  if (!str) {
    return [];
  } // Normalize spaces


  str = str.replace(SPACES_RE, ' '); // Normalize newlines

  str = str.replace(NEWLINES_RE, '\n'); // Replace tabs with proper number of spaces (1..4)

  if (str.indexOf('\t') >= 0) {
    str = str.replace(TABS_SCAN_RE, function (match, offset) {
      var result;

      if (str.charCodeAt(offset) === 0x0A) {
        lineStart = offset + 1;
        lastTabPos = 0;
        return match;
      }

      result = '    '.slice((offset - lineStart - lastTabPos) % 4);
      lastTabPos = offset - lineStart + 1;
      return result;
    });
  }

  state = new StateBlock(str, this, options, env, outTokens);
  this.tokenize(state, state.line, state.lineMax);
}; // Skip text characters for text token, place those to pending buffer
// and increment current pos
// Rule to skip pure text
// '{}$%@~+=:' reserved for extentions


function isTerminatorChar(ch) {
  switch (ch) {
    case 0x0A
    /* \n */
    :
    case 0x5C
    /* \ */
    :
    case 0x60
    /* ` */
    :
    case 0x2A
    /* * */
    :
    case 0x5F
    /* _ */
    :
    case 0x5E
    /* ^ */
    :
    case 0x5B
    /* [ */
    :
    case 0x5D
    /* ] */
    :
    case 0x21
    /* ! */
    :
    case 0x26
    /* & */
    :
    case 0x3C
    /* < */
    :
    case 0x3E
    /* > */
    :
    case 0x7B
    /* { */
    :
    case 0x7D
    /* } */
    :
    case 0x24
    /* $ */
    :
    case 0x25
    /* % */
    :
    case 0x40
    /* @ */
    :
    case 0x7E
    /* ~ */
    :
    case 0x2B
    /* + */
    :
    case 0x3D
    /* = */
    :
    case 0x3A
    /* : */
    :
      return true;

    default:
      return false;
  }
}

function text(state, silent) {
  var pos = state.pos;

  while (pos < state.posMax && !isTerminatorChar(state.src.charCodeAt(pos))) {
    pos++;
  }

  if (pos === state.pos) {
    return false;
  }

  if (!silent) {
    state.pending += state.src.slice(state.pos, pos);
  }

  state.pos = pos;
  return true;
} // Proceess '\n'


function newline(state, silent) {
  var pmax,
      max,
      pos = state.pos;

  if (state.src.charCodeAt(pos) !== 0x0A
  /* \n */
  ) {
      return false;
    }

  pmax = state.pending.length - 1;
  max = state.posMax; // '  \n' -> hardbreak
  // Lookup in pending chars is bad practice! Don't copy to other rules!
  // Pending string is stored in concat mode, indexed lookups will cause
  // convertion to flat mode.

  if (!silent) {
    if (pmax >= 0 && state.pending.charCodeAt(pmax) === 0x20) {
      if (pmax >= 1 && state.pending.charCodeAt(pmax - 1) === 0x20) {
        // Strip out all trailing spaces on this line.
        for (var i = pmax - 2; i >= 0; i--) {
          if (state.pending.charCodeAt(i) !== 0x20) {
            state.pending = state.pending.substring(0, i + 1);
            break;
          }
        }

        state.push({
          type: 'hardbreak',
          level: state.level
        });
      } else {
        state.pending = state.pending.slice(0, -1);
        state.push({
          type: 'softbreak',
          level: state.level
        });
      }
    } else {
      state.push({
        type: 'softbreak',
        level: state.level
      });
    }
  }

  pos++; // skip heading spaces for next line

  while (pos < max && state.src.charCodeAt(pos) === 0x20) {
    pos++;
  }

  state.pos = pos;
  return true;
} // Proceess escaped chars and hardbreaks


var ESCAPED = [];

for (var i = 0; i < 256; i++) {
  ESCAPED.push(0);
}

'\\!"#$%&\'()*+,./:;<=>?@[]^_`{|}~-'.split('').forEach(function (ch) {
  ESCAPED[ch.charCodeAt(0)] = 1;
});

function escape(state, silent) {
  var ch,
      pos = state.pos,
      max = state.posMax;

  if (state.src.charCodeAt(pos) !== 0x5C
  /* \ */
  ) {
      return false;
    }

  pos++;

  if (pos < max) {
    ch = state.src.charCodeAt(pos);

    if (ch < 256 && ESCAPED[ch] !== 0) {
      if (!silent) {
        state.pending += state.src[pos];
      }

      state.pos += 2;
      return true;
    }

    if (ch === 0x0A) {
      if (!silent) {
        state.push({
          type: 'hardbreak',
          level: state.level
        });
      }

      pos++; // skip leading whitespaces from next line

      while (pos < max && state.src.charCodeAt(pos) === 0x20) {
        pos++;
      }

      state.pos = pos;
      return true;
    }
  }

  if (!silent) {
    state.pending += '\\';
  }

  state.pos++;
  return true;
} // Parse backticks


function backticks(state, silent) {
  var start,
      max,
      marker,
      matchStart,
      matchEnd,
      pos = state.pos,
      ch = state.src.charCodeAt(pos);

  if (ch !== 0x60
  /* ` */
  ) {
      return false;
    }

  start = pos;
  pos++;
  max = state.posMax;

  while (pos < max && state.src.charCodeAt(pos) === 0x60
  /* ` */
  ) {
    pos++;
  }

  marker = state.src.slice(start, pos);
  matchStart = matchEnd = pos;

  while ((matchStart = state.src.indexOf('`', matchEnd)) !== -1) {
    matchEnd = matchStart + 1;

    while (matchEnd < max && state.src.charCodeAt(matchEnd) === 0x60
    /* ` */
    ) {
      matchEnd++;
    }

    if (matchEnd - matchStart === marker.length) {
      if (!silent) {
        state.push({
          type: 'code',
          content: state.src.slice(pos, matchStart).replace(/[ \n]+/g, ' ').trim(),
          block: false,
          level: state.level
        });
      }

      state.pos = matchEnd;
      return true;
    }
  }

  if (!silent) {
    state.pending += marker;
  }

  state.pos += marker.length;
  return true;
} // Process ~~deleted text~~


function del(state, silent) {
  var found,
      pos,
      stack,
      max = state.posMax,
      start = state.pos,
      lastChar,
      nextChar;

  if (state.src.charCodeAt(start) !== 0x7E
  /* ~ */
  ) {
      return false;
    }

  if (silent) {
    return false;
  } // don't run any pairs in validation mode


  if (start + 4 >= max) {
    return false;
  }

  if (state.src.charCodeAt(start + 1) !== 0x7E
  /* ~ */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  lastChar = start > 0 ? state.src.charCodeAt(start - 1) : -1;
  nextChar = state.src.charCodeAt(start + 2);

  if (lastChar === 0x7E
  /* ~ */
  ) {
      return false;
    }

  if (nextChar === 0x7E
  /* ~ */
  ) {
      return false;
    }

  if (nextChar === 0x20 || nextChar === 0x0A) {
    return false;
  }

  pos = start + 2;

  while (pos < max && state.src.charCodeAt(pos) === 0x7E
  /* ~ */
  ) {
    pos++;
  }

  if (pos > start + 3) {
    // sequence of 4+ markers taking as literal, same as in a emphasis
    state.pos += pos - start;

    if (!silent) {
      state.pending += state.src.slice(start, pos);
    }

    return true;
  }

  state.pos = start + 2;
  stack = 1;

  while (state.pos + 1 < max) {
    if (state.src.charCodeAt(state.pos) === 0x7E
    /* ~ */
    ) {
        if (state.src.charCodeAt(state.pos + 1) === 0x7E
        /* ~ */
        ) {
            lastChar = state.src.charCodeAt(state.pos - 1);
            nextChar = state.pos + 2 < max ? state.src.charCodeAt(state.pos + 2) : -1;

            if (nextChar !== 0x7E
            /* ~ */
            && lastChar !== 0x7E
            /* ~ */
            ) {
                if (lastChar !== 0x20 && lastChar !== 0x0A) {
                  // closing '~~'
                  stack--;
                } else if (nextChar !== 0x20 && nextChar !== 0x0A) {
                  // opening '~~'
                  stack++;
                } // else {
                //  // standalone ' ~~ ' indented with spaces
                // }


                if (stack <= 0) {
                  found = true;
                  break;
                }
              }
          }
      }

    state.parser.skipToken(state);
  }

  if (!found) {
    // parser failed to find ending tag, so it's not valid emphasis
    state.pos = start;
    return false;
  } // found!


  state.posMax = state.pos;
  state.pos = start + 2;

  if (!silent) {
    state.push({
      type: 'del_open',
      level: state.level++
    });
    state.parser.tokenize(state);
    state.push({
      type: 'del_close',
      level: --state.level
    });
  }

  state.pos = state.posMax + 2;
  state.posMax = max;
  return true;
} // Process ++inserted text++


function ins(state, silent) {
  var found,
      pos,
      stack,
      max = state.posMax,
      start = state.pos,
      lastChar,
      nextChar;

  if (state.src.charCodeAt(start) !== 0x2B
  /* + */
  ) {
      return false;
    }

  if (silent) {
    return false;
  } // don't run any pairs in validation mode


  if (start + 4 >= max) {
    return false;
  }

  if (state.src.charCodeAt(start + 1) !== 0x2B
  /* + */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  lastChar = start > 0 ? state.src.charCodeAt(start - 1) : -1;
  nextChar = state.src.charCodeAt(start + 2);

  if (lastChar === 0x2B
  /* + */
  ) {
      return false;
    }

  if (nextChar === 0x2B
  /* + */
  ) {
      return false;
    }

  if (nextChar === 0x20 || nextChar === 0x0A) {
    return false;
  }

  pos = start + 2;

  while (pos < max && state.src.charCodeAt(pos) === 0x2B
  /* + */
  ) {
    pos++;
  }

  if (pos !== start + 2) {
    // sequence of 3+ markers taking as literal, same as in a emphasis
    state.pos += pos - start;

    if (!silent) {
      state.pending += state.src.slice(start, pos);
    }

    return true;
  }

  state.pos = start + 2;
  stack = 1;

  while (state.pos + 1 < max) {
    if (state.src.charCodeAt(state.pos) === 0x2B
    /* + */
    ) {
        if (state.src.charCodeAt(state.pos + 1) === 0x2B
        /* + */
        ) {
            lastChar = state.src.charCodeAt(state.pos - 1);
            nextChar = state.pos + 2 < max ? state.src.charCodeAt(state.pos + 2) : -1;

            if (nextChar !== 0x2B
            /* + */
            && lastChar !== 0x2B
            /* + */
            ) {
                if (lastChar !== 0x20 && lastChar !== 0x0A) {
                  // closing '++'
                  stack--;
                } else if (nextChar !== 0x20 && nextChar !== 0x0A) {
                  // opening '++'
                  stack++;
                } // else {
                //  // standalone ' ++ ' indented with spaces
                // }


                if (stack <= 0) {
                  found = true;
                  break;
                }
              }
          }
      }

    state.parser.skipToken(state);
  }

  if (!found) {
    // parser failed to find ending tag, so it's not valid emphasis
    state.pos = start;
    return false;
  } // found!


  state.posMax = state.pos;
  state.pos = start + 2;

  if (!silent) {
    state.push({
      type: 'ins_open',
      level: state.level++
    });
    state.parser.tokenize(state);
    state.push({
      type: 'ins_close',
      level: --state.level
    });
  }

  state.pos = state.posMax + 2;
  state.posMax = max;
  return true;
} // Process ==highlighted text==


function mark(state, silent) {
  var found,
      pos,
      stack,
      max = state.posMax,
      start = state.pos,
      lastChar,
      nextChar;

  if (state.src.charCodeAt(start) !== 0x3D
  /* = */
  ) {
      return false;
    }

  if (silent) {
    return false;
  } // don't run any pairs in validation mode


  if (start + 4 >= max) {
    return false;
  }

  if (state.src.charCodeAt(start + 1) !== 0x3D
  /* = */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  lastChar = start > 0 ? state.src.charCodeAt(start - 1) : -1;
  nextChar = state.src.charCodeAt(start + 2);

  if (lastChar === 0x3D
  /* = */
  ) {
      return false;
    }

  if (nextChar === 0x3D
  /* = */
  ) {
      return false;
    }

  if (nextChar === 0x20 || nextChar === 0x0A) {
    return false;
  }

  pos = start + 2;

  while (pos < max && state.src.charCodeAt(pos) === 0x3D
  /* = */
  ) {
    pos++;
  }

  if (pos !== start + 2) {
    // sequence of 3+ markers taking as literal, same as in a emphasis
    state.pos += pos - start;

    if (!silent) {
      state.pending += state.src.slice(start, pos);
    }

    return true;
  }

  state.pos = start + 2;
  stack = 1;

  while (state.pos + 1 < max) {
    if (state.src.charCodeAt(state.pos) === 0x3D
    /* = */
    ) {
        if (state.src.charCodeAt(state.pos + 1) === 0x3D
        /* = */
        ) {
            lastChar = state.src.charCodeAt(state.pos - 1);
            nextChar = state.pos + 2 < max ? state.src.charCodeAt(state.pos + 2) : -1;

            if (nextChar !== 0x3D
            /* = */
            && lastChar !== 0x3D
            /* = */
            ) {
                if (lastChar !== 0x20 && lastChar !== 0x0A) {
                  // closing '=='
                  stack--;
                } else if (nextChar !== 0x20 && nextChar !== 0x0A) {
                  // opening '=='
                  stack++;
                } // else {
                //  // standalone ' == ' indented with spaces
                // }


                if (stack <= 0) {
                  found = true;
                  break;
                }
              }
          }
      }

    state.parser.skipToken(state);
  }

  if (!found) {
    // parser failed to find ending tag, so it's not valid emphasis
    state.pos = start;
    return false;
  } // found!


  state.posMax = state.pos;
  state.pos = start + 2;

  if (!silent) {
    state.push({
      type: 'mark_open',
      level: state.level++
    });
    state.parser.tokenize(state);
    state.push({
      type: 'mark_close',
      level: --state.level
    });
  }

  state.pos = state.posMax + 2;
  state.posMax = max;
  return true;
} // Process *this* and _that_


function isAlphaNum(code) {
  return code >= 0x30
  /* 0 */
  && code <= 0x39
  /* 9 */
  || code >= 0x41
  /* A */
  && code <= 0x5A
  /* Z */
  || code >= 0x61
  /* a */
  && code <= 0x7A
  /* z */
  ;
} // parse sequence of emphasis markers,
// "start" should point at a valid marker


function scanDelims(state, start) {
  var pos = start,
      lastChar,
      nextChar,
      count,
      can_open = true,
      can_close = true,
      max = state.posMax,
      marker = state.src.charCodeAt(start);
  lastChar = start > 0 ? state.src.charCodeAt(start - 1) : -1;

  while (pos < max && state.src.charCodeAt(pos) === marker) {
    pos++;
  }

  if (pos >= max) {
    can_open = false;
  }

  count = pos - start;

  if (count >= 4) {
    // sequence of four or more unescaped markers can't start/end an emphasis
    can_open = can_close = false;
  } else {
    nextChar = pos < max ? state.src.charCodeAt(pos) : -1; // check whitespace conditions

    if (nextChar === 0x20 || nextChar === 0x0A) {
      can_open = false;
    }

    if (lastChar === 0x20 || lastChar === 0x0A) {
      can_close = false;
    }

    if (marker === 0x5F
    /* _ */
    ) {
        // check if we aren't inside the word
        if (isAlphaNum(lastChar)) {
          can_open = false;
        }

        if (isAlphaNum(nextChar)) {
          can_close = false;
        }
      }
  }

  return {
    can_open: can_open,
    can_close: can_close,
    delims: count
  };
}

function emphasis(state, silent) {
  var startCount,
      count,
      found,
      oldCount,
      newCount,
      stack,
      res,
      max = state.posMax,
      start = state.pos,
      marker = state.src.charCodeAt(start);

  if (marker !== 0x5F
  /* _ */
  && marker !== 0x2A
  /* * */
  ) {
      return false;
    }

  if (silent) {
    return false;
  } // don't run any pairs in validation mode


  res = scanDelims(state, start);
  startCount = res.delims;

  if (!res.can_open) {
    state.pos += startCount;

    if (!silent) {
      state.pending += state.src.slice(start, state.pos);
    }

    return true;
  }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  state.pos = start + startCount;
  stack = [startCount];

  while (state.pos < max) {
    if (state.src.charCodeAt(state.pos) === marker) {
      res = scanDelims(state, state.pos);
      count = res.delims;

      if (res.can_close) {
        oldCount = stack.pop();
        newCount = count;

        while (oldCount !== newCount) {
          if (newCount < oldCount) {
            stack.push(oldCount - newCount);
            break;
          } // assert(newCount > oldCount)


          newCount -= oldCount;

          if (stack.length === 0) {
            break;
          }

          state.pos += oldCount;
          oldCount = stack.pop();
        }

        if (stack.length === 0) {
          startCount = oldCount;
          found = true;
          break;
        }

        state.pos += count;
        continue;
      }

      if (res.can_open) {
        stack.push(count);
      }

      state.pos += count;
      continue;
    }

    state.parser.skipToken(state);
  }

  if (!found) {
    // parser failed to find ending tag, so it's not valid emphasis
    state.pos = start;
    return false;
  } // found!


  state.posMax = state.pos;
  state.pos = start + startCount;

  if (!silent) {
    if (startCount === 2 || startCount === 3) {
      state.push({
        type: 'strong_open',
        level: state.level++
      });
    }

    if (startCount === 1 || startCount === 3) {
      state.push({
        type: 'em_open',
        level: state.level++
      });
    }

    state.parser.tokenize(state);

    if (startCount === 1 || startCount === 3) {
      state.push({
        type: 'em_close',
        level: --state.level
      });
    }

    if (startCount === 2 || startCount === 3) {
      state.push({
        type: 'strong_close',
        level: --state.level
      });
    }
  }

  state.pos = state.posMax + startCount;
  state.posMax = max;
  return true;
} // Process ~subscript~
// same as UNESCAPE_MD_RE plus a space


var UNESCAPE_RE = /\\([ \\!"#$%&'()*+,.\/:;<=>?@[\]^_`{|}~-])/g;

function sub(state, silent) {
  var found,
      content,
      max = state.posMax,
      start = state.pos;

  if (state.src.charCodeAt(start) !== 0x7E
  /* ~ */
  ) {
      return false;
    }

  if (silent) {
    return false;
  } // don't run any pairs in validation mode


  if (start + 2 >= max) {
    return false;
  }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  state.pos = start + 1;

  while (state.pos < max) {
    if (state.src.charCodeAt(state.pos) === 0x7E
    /* ~ */
    ) {
        found = true;
        break;
      }

    state.parser.skipToken(state);
  }

  if (!found || start + 1 === state.pos) {
    state.pos = start;
    return false;
  }

  content = state.src.slice(start + 1, state.pos); // don't allow unescaped spaces/newlines inside

  if (content.match(/(^|[^\\])(\\\\)*\s/)) {
    state.pos = start;
    return false;
  } // found!


  state.posMax = state.pos;
  state.pos = start + 1;

  if (!silent) {
    state.push({
      type: 'sub',
      level: state.level,
      content: content.replace(UNESCAPE_RE, '$1')
    });
  }

  state.pos = state.posMax + 1;
  state.posMax = max;
  return true;
} // Process ^superscript^
// same as UNESCAPE_MD_RE plus a space


var UNESCAPE_RE$1 = /\\([ \\!"#$%&'()*+,.\/:;<=>?@[\]^_`{|}~-])/g;

function sup(state, silent) {
  var found,
      content,
      max = state.posMax,
      start = state.pos;

  if (state.src.charCodeAt(start) !== 0x5E
  /* ^ */
  ) {
      return false;
    }

  if (silent) {
    return false;
  } // don't run any pairs in validation mode


  if (start + 2 >= max) {
    return false;
  }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  state.pos = start + 1;

  while (state.pos < max) {
    if (state.src.charCodeAt(state.pos) === 0x5E
    /* ^ */
    ) {
        found = true;
        break;
      }

    state.parser.skipToken(state);
  }

  if (!found || start + 1 === state.pos) {
    state.pos = start;
    return false;
  }

  content = state.src.slice(start + 1, state.pos); // don't allow unescaped spaces/newlines inside

  if (content.match(/(^|[^\\])(\\\\)*\s/)) {
    state.pos = start;
    return false;
  } // found!


  state.posMax = state.pos;
  state.pos = start + 1;

  if (!silent) {
    state.push({
      type: 'sup',
      level: state.level,
      content: content.replace(UNESCAPE_RE$1, '$1')
    });
  }

  state.pos = state.posMax + 1;
  state.posMax = max;
  return true;
} // Process [links](<to> "stuff")


function links(state, silent) {
  var labelStart,
      labelEnd,
      label,
      href,
      title,
      pos,
      ref,
      code,
      isImage = false,
      oldPos = state.pos,
      max = state.posMax,
      start = state.pos,
      marker = state.src.charCodeAt(start);

  if (marker === 0x21
  /* ! */
  ) {
      isImage = true;
      marker = state.src.charCodeAt(++start);
    }

  if (marker !== 0x5B
  /* [ */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  labelStart = start + 1;
  labelEnd = parseLinkLabel(state, start); // parser failed to find ']', so it's not a valid link

  if (labelEnd < 0) {
    return false;
  }

  pos = labelEnd + 1;

  if (pos < max && state.src.charCodeAt(pos) === 0x28
  /* ( */
  ) {
      //
      // Inline link
      //
      // [link](  <href>  "title"  )
      //        ^^ skipping these spaces
      pos++;

      for (; pos < max; pos++) {
        code = state.src.charCodeAt(pos);

        if (code !== 0x20 && code !== 0x0A) {
          break;
        }
      }

      if (pos >= max) {
        return false;
      } // [link](  <href>  "title"  )
      //          ^^^^^^ parsing link destination


      start = pos;

      if (parseLinkDestination(state, pos)) {
        href = state.linkContent;
        pos = state.pos;
      } else {
        href = '';
      } // [link](  <href>  "title"  )
      //                ^^ skipping these spaces


      start = pos;

      for (; pos < max; pos++) {
        code = state.src.charCodeAt(pos);

        if (code !== 0x20 && code !== 0x0A) {
          break;
        }
      } // [link](  <href>  "title"  )
      //                  ^^^^^^^ parsing link title


      if (pos < max && start !== pos && parseLinkTitle(state, pos)) {
        title = state.linkContent;
        pos = state.pos; // [link](  <href>  "title"  )
        //                         ^^ skipping these spaces

        for (; pos < max; pos++) {
          code = state.src.charCodeAt(pos);

          if (code !== 0x20 && code !== 0x0A) {
            break;
          }
        }
      } else {
        title = '';
      }

      if (pos >= max || state.src.charCodeAt(pos) !== 0x29
      /* ) */
      ) {
          state.pos = oldPos;
          return false;
        }

      pos++;
    } else {
    //
    // Link reference
    //
    // do not allow nested reference links
    if (state.linkLevel > 0) {
      return false;
    } // [foo]  [bar]
    //      ^^ optional whitespace (can include newlines)


    for (; pos < max; pos++) {
      code = state.src.charCodeAt(pos);

      if (code !== 0x20 && code !== 0x0A) {
        break;
      }
    }

    if (pos < max && state.src.charCodeAt(pos) === 0x5B
    /* [ */
    ) {
        start = pos + 1;
        pos = parseLinkLabel(state, pos);

        if (pos >= 0) {
          label = state.src.slice(start, pos++);
        } else {
          pos = start - 1;
        }
      } // covers label === '' and label === undefined
    // (collapsed reference link and shortcut reference link respectively)


    if (!label) {
      if (typeof label === 'undefined') {
        pos = labelEnd + 1;
      }

      label = state.src.slice(labelStart, labelEnd);
    }

    ref = state.env.references[normalizeReference(label)];

    if (!ref) {
      state.pos = oldPos;
      return false;
    }

    href = ref.href;
    title = ref.title;
  } //
  // We found the end of the link, and know for a fact it's a valid link;
  // so all that's left to do is to call tokenizer.
  //


  if (!silent) {
    state.pos = labelStart;
    state.posMax = labelEnd;

    if (isImage) {
      state.push({
        type: 'image',
        src: href,
        title: title,
        alt: state.src.substr(labelStart, labelEnd - labelStart),
        level: state.level
      });
    } else {
      state.push({
        type: 'link_open',
        href: href,
        title: title,
        level: state.level++
      });
      state.linkLevel++;
      state.parser.tokenize(state);
      state.linkLevel--;
      state.push({
        type: 'link_close',
        level: --state.level
      });
    }
  }

  state.pos = pos;
  state.posMax = max;
  return true;
} // Process inline footnotes (^[...])


function footnote_inline(state, silent) {
  var labelStart,
      labelEnd,
      footnoteId,
      oldLength,
      max = state.posMax,
      start = state.pos;

  if (start + 2 >= max) {
    return false;
  }

  if (state.src.charCodeAt(start) !== 0x5E
  /* ^ */
  ) {
      return false;
    }

  if (state.src.charCodeAt(start + 1) !== 0x5B
  /* [ */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  labelStart = start + 2;
  labelEnd = parseLinkLabel(state, start + 1); // parser failed to find ']', so it's not a valid note

  if (labelEnd < 0) {
    return false;
  } // We found the end of the link, and know for a fact it's a valid link;
  // so all that's left to do is to call tokenizer.
  //


  if (!silent) {
    if (!state.env.footnotes) {
      state.env.footnotes = {};
    }

    if (!state.env.footnotes.list) {
      state.env.footnotes.list = [];
    }

    footnoteId = state.env.footnotes.list.length;
    state.pos = labelStart;
    state.posMax = labelEnd;
    state.push({
      type: 'footnote_ref',
      id: footnoteId,
      level: state.level
    });
    state.linkLevel++;
    oldLength = state.tokens.length;
    state.parser.tokenize(state);
    state.env.footnotes.list[footnoteId] = {
      tokens: state.tokens.splice(oldLength)
    };
    state.linkLevel--;
  }

  state.pos = labelEnd + 1;
  state.posMax = max;
  return true;
} // Process footnote references ([^...])


function footnote_ref(state, silent) {
  var label,
      pos,
      footnoteId,
      footnoteSubId,
      max = state.posMax,
      start = state.pos; // should be at least 4 chars - "[^x]"

  if (start + 3 > max) {
    return false;
  }

  if (!state.env.footnotes || !state.env.footnotes.refs) {
    return false;
  }

  if (state.src.charCodeAt(start) !== 0x5B
  /* [ */
  ) {
      return false;
    }

  if (state.src.charCodeAt(start + 1) !== 0x5E
  /* ^ */
  ) {
      return false;
    }

  if (state.level >= state.options.maxNesting) {
    return false;
  }

  for (pos = start + 2; pos < max; pos++) {
    if (state.src.charCodeAt(pos) === 0x20) {
      return false;
    }

    if (state.src.charCodeAt(pos) === 0x0A) {
      return false;
    }

    if (state.src.charCodeAt(pos) === 0x5D
    /* ] */
    ) {
        break;
      }
  }

  if (pos === start + 2) {
    return false;
  } // no empty footnote labels


  if (pos >= max) {
    return false;
  }

  pos++;
  label = state.src.slice(start + 2, pos - 1);

  if (typeof state.env.footnotes.refs[':' + label] === 'undefined') {
    return false;
  }

  if (!silent) {
    if (!state.env.footnotes.list) {
      state.env.footnotes.list = [];
    }

    if (state.env.footnotes.refs[':' + label] < 0) {
      footnoteId = state.env.footnotes.list.length;
      state.env.footnotes.list[footnoteId] = {
        label: label,
        count: 0
      };
      state.env.footnotes.refs[':' + label] = footnoteId;
    } else {
      footnoteId = state.env.footnotes.refs[':' + label];
    }

    footnoteSubId = state.env.footnotes.list[footnoteId].count;
    state.env.footnotes.list[footnoteId].count++;
    state.push({
      type: 'footnote_ref',
      id: footnoteId,
      subId: footnoteSubId,
      level: state.level
    });
  }

  state.pos = pos;
  state.posMax = max;
  return true;
} // List of valid url schemas, accorting to commonmark spec
// http://jgm.github.io/CommonMark/spec.html#autolinks


var url_schemas = ['coap', 'doi', 'javascript', 'aaa', 'aaas', 'about', 'acap', 'cap', 'cid', 'crid', 'data', 'dav', 'dict', 'dns', 'file', 'ftp', 'geo', 'go', 'gopher', 'h323', 'http', 'https', 'iax', 'icap', 'im', 'imap', 'info', 'ipp', 'iris', 'iris.beep', 'iris.xpc', 'iris.xpcs', 'iris.lwz', 'ldap', 'mailto', 'mid', 'msrp', 'msrps', 'mtqp', 'mupdate', 'news', 'nfs', 'ni', 'nih', 'nntp', 'opaquelocktoken', 'pop', 'pres', 'rtsp', 'service', 'session', 'shttp', 'sieve', 'sip', 'sips', 'sms', 'snmp', 'soap.beep', 'soap.beeps', 'tag', 'tel', 'telnet', 'tftp', 'thismessage', 'tn3270', 'tip', 'tv', 'urn', 'vemmi', 'ws', 'wss', 'xcon', 'xcon-userid', 'xmlrpc.beep', 'xmlrpc.beeps', 'xmpp', 'z39.50r', 'z39.50s', 'adiumxtra', 'afp', 'afs', 'aim', 'apt', 'attachment', 'aw', 'beshare', 'bitcoin', 'bolo', 'callto', 'chrome', 'chrome-extension', 'com-eventbrite-attendee', 'content', 'cvs', 'dlna-playsingle', 'dlna-playcontainer', 'dtn', 'dvb', 'ed2k', 'facetime', 'feed', 'finger', 'fish', 'gg', 'git', 'gizmoproject', 'gtalk', 'hcp', 'icon', 'ipn', 'irc', 'irc6', 'ircs', 'itms', 'jar', 'jms', 'keyparc', 'lastfm', 'ldaps', 'magnet', 'maps', 'market', 'message', 'mms', 'ms-help', 'msnim', 'mumble', 'mvn', 'notes', 'oid', 'palm', 'paparazzi', 'platform', 'proxy', 'psyc', 'query', 'res', 'resource', 'rmi', 'rsync', 'rtmp', 'secondlife', 'sftp', 'sgn', 'skype', 'smb', 'soldat', 'spotify', 'ssh', 'steam', 'svn', 'teamspeak', 'things', 'udp', 'unreal', 'ut2004', 'ventrilo', 'view-source', 'webcal', 'wtai', 'wyciwyg', 'xfire', 'xri', 'ymsgr']; // Process autolinks '<protocol:...>'

/*eslint max-len:0*/

var EMAIL_RE = /^<([a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*)>/;
var AUTOLINK_RE = /^<([a-zA-Z.\-]{1,25}):([^<>\x00-\x20]*)>/;

function autolink(state, silent) {
  var tail,
      linkMatch,
      emailMatch,
      url,
      fullUrl,
      pos = state.pos;

  if (state.src.charCodeAt(pos) !== 0x3C
  /* < */
  ) {
      return false;
    }

  tail = state.src.slice(pos);

  if (tail.indexOf('>') < 0) {
    return false;
  }

  linkMatch = tail.match(AUTOLINK_RE);

  if (linkMatch) {
    if (url_schemas.indexOf(linkMatch[1].toLowerCase()) < 0) {
      return false;
    }

    url = linkMatch[0].slice(1, -1);
    fullUrl = normalizeLink(url);

    if (!state.parser.validateLink(url)) {
      return false;
    }

    if (!silent) {
      state.push({
        type: 'link_open',
        href: fullUrl,
        level: state.level
      });
      state.push({
        type: 'text',
        content: url,
        level: state.level + 1
      });
      state.push({
        type: 'link_close',
        level: state.level
      });
    }

    state.pos += linkMatch[0].length;
    return true;
  }

  emailMatch = tail.match(EMAIL_RE);

  if (emailMatch) {
    url = emailMatch[0].slice(1, -1);
    fullUrl = normalizeLink('mailto:' + url);

    if (!state.parser.validateLink(fullUrl)) {
      return false;
    }

    if (!silent) {
      state.push({
        type: 'link_open',
        href: fullUrl,
        level: state.level
      });
      state.push({
        type: 'text',
        content: url,
        level: state.level + 1
      });
      state.push({
        type: 'link_close',
        level: state.level
      });
    }

    state.pos += emailMatch[0].length;
    return true;
  }

  return false;
} // Regexps to match html elements


function replace$1(regex, options) {
  regex = regex.source;
  options = options || '';
  return function self(name, val) {
    if (!name) {
      return new RegExp(regex, options);
    }

    val = val.source || val;
    regex = regex.replace(name, val);
    return self;
  };
}

var attr_name = /[a-zA-Z_:][a-zA-Z0-9:._-]*/;
var unquoted = /[^"'=<>`\x00-\x20]+/;
var single_quoted = /'[^']*'/;
var double_quoted = /"[^"]*"/;
/*eslint no-spaced-func:0*/

var attr_value = replace$1(/(?:unquoted|single_quoted|double_quoted)/)('unquoted', unquoted)('single_quoted', single_quoted)('double_quoted', double_quoted)();
var attribute = replace$1(/(?:\s+attr_name(?:\s*=\s*attr_value)?)/)('attr_name', attr_name)('attr_value', attr_value)();
var open_tag = replace$1(/<[A-Za-z][A-Za-z0-9]*attribute*\s*\/?>/)('attribute', attribute)();
var close_tag = /<\/[A-Za-z][A-Za-z0-9]*\s*>/;
var comment = /<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->/;
var processing = /<[?].*?[?]>/;
var declaration = /<![A-Z]+\s+[^>]*>/;
var cdata = /<!\[CDATA\[[\s\S]*?\]\]>/;
var HTML_TAG_RE = replace$1(/^(?:open_tag|close_tag|comment|processing|declaration|cdata)/)('open_tag', open_tag)('close_tag', close_tag)('comment', comment)('processing', processing)('declaration', declaration)('cdata', cdata)(); // Process html tags

function isLetter$2(ch) {
  /*eslint no-bitwise:0*/
  var lc = ch | 0x20; // to lower case

  return lc >= 0x61
  /* a */
  && lc <= 0x7a
  /* z */
  ;
}

function htmltag(state, silent) {
  var ch,
      match,
      max,
      pos = state.pos;

  if (!state.options.html) {
    return false;
  } // Check start


  max = state.posMax;

  if (state.src.charCodeAt(pos) !== 0x3C
  /* < */
  || pos + 2 >= max) {
    return false;
  } // Quick fail on second char


  ch = state.src.charCodeAt(pos + 1);

  if (ch !== 0x21
  /* ! */
  && ch !== 0x3F
  /* ? */
  && ch !== 0x2F
  /* / */
  && !isLetter$2(ch)) {
    return false;
  }

  match = state.src.slice(pos).match(HTML_TAG_RE);

  if (!match) {
    return false;
  }

  if (!silent) {
    state.push({
      type: 'htmltag',
      content: state.src.slice(pos, pos + match[0].length),
      level: state.level
    });
  }

  state.pos += match[0].length;
  return true;
} // Process html entity - &#123;, &#xAF;, &quot;, ...


var DIGITAL_RE = /^&#((?:x[a-f0-9]{1,8}|[0-9]{1,8}));/i;
var NAMED_RE = /^&([a-z][a-z0-9]{1,31});/i;

function entity(state, silent) {
  var ch,
      code,
      match,
      pos = state.pos,
      max = state.posMax;

  if (state.src.charCodeAt(pos) !== 0x26
  /* & */
  ) {
      return false;
    }

  if (pos + 1 < max) {
    ch = state.src.charCodeAt(pos + 1);

    if (ch === 0x23
    /* # */
    ) {
        match = state.src.slice(pos).match(DIGITAL_RE);

        if (match) {
          if (!silent) {
            code = match[1][0].toLowerCase() === 'x' ? parseInt(match[1].slice(1), 16) : parseInt(match[1], 10);
            state.pending += isValidEntityCode(code) ? fromCodePoint(code) : fromCodePoint(0xFFFD);
          }

          state.pos += match[0].length;
          return true;
        }
      } else {
      match = state.src.slice(pos).match(NAMED_RE);

      if (match) {
        var decoded = decodeEntity(match[1]);

        if (match[1] !== decoded) {
          if (!silent) {
            state.pending += decoded;
          }

          state.pos += match[0].length;
          return true;
        }
      }
    }
  }

  if (!silent) {
    state.pending += '&';
  }

  state.pos++;
  return true;
}
/**
 * Inline Parser `rules`
 */


var _rules$2 = [['text', text], ['newline', newline], ['escape', escape], ['backticks', backticks], ['del', del], ['ins', ins], ['mark', mark], ['emphasis', emphasis], ['sub', sub], ['sup', sup], ['links', links], ['footnote_inline', footnote_inline], ['footnote_ref', footnote_ref], ['autolink', autolink], ['htmltag', htmltag], ['entity', entity]];
/**
 * Inline Parser class. Note that link validation is stricter
 * in Remarkable than what is specified by CommonMark. If you
 * want to change this you can use a custom validator.
 *
 * @api private
 */

function ParserInline() {
  this.ruler = new Ruler();

  for (var i = 0; i < _rules$2.length; i++) {
    this.ruler.push(_rules$2[i][0], _rules$2[i][1]);
  } // Can be overridden with a custom validator


  this.validateLink = validateLink;
}
/**
 * Skip a single token by running all rules in validation mode.
 * Returns `true` if any rule reports success.
 *
 * @param  {Object} `state`
 * @api privage
 */


ParserInline.prototype.skipToken = function (state) {
  var rules = this.ruler.getRules('');
  var len = rules.length;
  var pos = state.pos;
  var i, cached_pos;

  if ((cached_pos = state.cacheGet(pos)) > 0) {
    state.pos = cached_pos;
    return;
  }

  for (i = 0; i < len; i++) {
    if (rules[i](state, true)) {
      state.cacheSet(pos, state.pos);
      return;
    }
  }

  state.pos++;
  state.cacheSet(pos, state.pos);
};
/**
 * Generate tokens for the given input range.
 *
 * @param  {Object} `state`
 * @api private
 */


ParserInline.prototype.tokenize = function (state) {
  var rules = this.ruler.getRules('');
  var len = rules.length;
  var end = state.posMax;
  var ok, i;

  while (state.pos < end) {
    // Try all possible rules.
    // On success, the rule should:
    //
    // - update `state.pos`
    // - update `state.tokens`
    // - return true
    for (i = 0; i < len; i++) {
      ok = rules[i](state, false);

      if (ok) {
        break;
      }
    }

    if (ok) {
      if (state.pos >= end) {
        break;
      }

      continue;
    }

    state.pending += state.src[state.pos++];
  }

  if (state.pending) {
    state.pushPending();
  }
};
/**
 * Parse the given input string.
 *
 * @param  {String} `str`
 * @param  {Object} `options`
 * @param  {Object} `env`
 * @param  {Array} `outTokens`
 * @api private
 */


ParserInline.prototype.parse = function (str, options, env, outTokens) {
  var state = new StateInline(str, this, options, env, outTokens);
  this.tokenize(state);
};
/**
 * Validate the given `url` by checking for bad protocols.
 *
 * @param  {String} `url`
 * @return {Boolean}
 */


function validateLink(url) {
  var BAD_PROTOCOLS = ['vbscript', 'javascript', 'file', 'data'];
  var str = url.trim().toLowerCase(); // Care about digital entities "javascript&#x3A;alert(1)"

  str = replaceEntities(str);

  if (str.indexOf(':') !== -1 && BAD_PROTOCOLS.indexOf(str.split(':')[0]) !== -1) {
    return false;
  }

  return true;
} // Remarkable default options


var defaultConfig = {
  options: {
    html: false,
    // Enable HTML tags in source
    xhtmlOut: false,
    // Use '/' to close single tags (<br />)
    breaks: false,
    // Convert '\n' in paragraphs into <br>
    langPrefix: 'language-',
    // CSS language prefix for fenced blocks
    linkTarget: '',
    // set target to open link in
    // Enable some language-neutral replacements + quotes beautification
    typographer: false,
    // Double + single quotes replacement pairs, when typographer enabled,
    // and smartquotes on. Set doubles to '«»' for Russian, '„“' for German.
    quotes: '“”‘’',
    // Highlighter function. Should return escaped HTML,
    // or '' if input not changed
    //
    // function (/*str, lang*/) { return ''; }
    //
    highlight: null,
    maxNesting: 20 // Internal protection, recursion limit

  },
  components: {
    core: {
      rules: ['block', 'inline', 'references', 'replacements', 'smartquotes', 'references', 'abbr2', 'footnote_tail']
    },
    block: {
      rules: ['blockquote', 'code', 'fences', 'footnote', 'heading', 'hr', 'htmlblock', 'lheading', 'list', 'paragraph', 'table']
    },
    inline: {
      rules: ['autolink', 'backticks', 'del', 'emphasis', 'entity', 'escape', 'footnote_ref', 'htmltag', 'links', 'newline', 'text']
    }
  }
}; // Remarkable default options

var fullConfig = {
  options: {
    html: false,
    // Enable HTML tags in source
    xhtmlOut: false,
    // Use '/' to close single tags (<br />)
    breaks: false,
    // Convert '\n' in paragraphs into <br>
    langPrefix: 'language-',
    // CSS language prefix for fenced blocks
    linkTarget: '',
    // set target to open link in
    // Enable some language-neutral replacements + quotes beautification
    typographer: false,
    // Double + single quotes replacement pairs, when typographer enabled,
    // and smartquotes on. Set doubles to '«»' for Russian, '„“' for German.
    quotes: '“”‘’',
    // Highlighter function. Should return escaped HTML,
    // or '' if input not changed
    //
    // function (/*str, lang*/) { return ''; }
    //
    highlight: null,
    maxNesting: 20 // Internal protection, recursion limit

  },
  components: {
    // Don't restrict core/block/inline rules
    core: {},
    block: {},
    inline: {}
  }
}; // Commonmark default options

var commonmarkConfig = {
  options: {
    html: true,
    // Enable HTML tags in source
    xhtmlOut: true,
    // Use '/' to close single tags (<br />)
    breaks: false,
    // Convert '\n' in paragraphs into <br>
    langPrefix: 'language-',
    // CSS language prefix for fenced blocks
    linkTarget: '',
    // set target to open link in
    // Enable some language-neutral replacements + quotes beautification
    typographer: false,
    // Double + single quotes replacement pairs, when typographer enabled,
    // and smartquotes on. Set doubles to '«»' for Russian, '„“' for German.
    quotes: '“”‘’',
    // Highlighter function. Should return escaped HTML,
    // or '' if input not changed
    //
    // function (/*str, lang*/) { return ''; }
    //
    highlight: null,
    maxNesting: 20 // Internal protection, recursion limit

  },
  components: {
    core: {
      rules: ['block', 'inline', 'references', 'abbr2']
    },
    block: {
      rules: ['blockquote', 'code', 'fences', 'heading', 'hr', 'htmlblock', 'lheading', 'list', 'paragraph']
    },
    inline: {
      rules: ['autolink', 'backticks', 'emphasis', 'entity', 'escape', 'htmltag', 'links', 'newline', 'text']
    }
  }
};
/**
 * Preset configs
 */

var config = {
  'default': defaultConfig,
  'full': fullConfig,
  'commonmark': commonmarkConfig
};
/**
 * The `StateCore` class manages state.
 *
 * @param {Object} `instance` Remarkable instance
 * @param {String} `str` Markdown string
 * @param {Object} `env`
 */

function StateCore(instance, str, env) {
  this.src = str;
  this.env = env;
  this.options = instance.options;
  this.tokens = [];
  this.inlineMode = false;
  this.inline = instance.inline;
  this.block = instance.block;
  this.renderer = instance.renderer;
  this.typographer = instance.typographer;
}
/**
 * The main `Remarkable` class. Create an instance of
 * `Remarkable` with a `preset` and/or `options`.
 *
 * @param {String} `preset` If no preset is given, `default` is used.
 * @param {Object} `options`
 */


function Remarkable(preset, options) {
  if (typeof preset !== 'string') {
    options = preset;
    preset = 'default';
  }

  if (options && options.linkify != null) {
    console.warn('linkify option is removed. Use linkify plugin instead:\n\n' + 'import Remarkable from \'remarkable\';\n' + 'import linkify from \'remarkable/linkify\';\n' + 'new Remarkable().use(linkify)\n');
  }

  this.inline = new ParserInline();
  this.block = new ParserBlock();
  this.core = new Core();
  this.renderer = new Renderer();
  this.ruler = new Ruler();
  this.options = {};
  this.configure(config[preset]);
  this.set(options || {});
}
/**
 * Set options as an alternative to passing them
 * to the constructor.
 *
 * ```js
 * md.set({typographer: true});
 * ```
 * @param {Object} `options`
 * @api public
 */


Remarkable.prototype.set = function (options) {
  assign(this.options, options);
};
/**
 * Batch loader for components rules states, and options
 *
 * @param  {Object} `presets`
 */


Remarkable.prototype.configure = function (presets) {
  var self = this;

  if (!presets) {
    throw new Error('Wrong `remarkable` preset, check name/content');
  }

  if (presets.options) {
    self.set(presets.options);
  }

  if (presets.components) {
    Object.keys(presets.components).forEach(function (name) {
      if (presets.components[name].rules) {
        self[name].ruler.enable(presets.components[name].rules, true);
      }
    });
  }
};
/**
 * Use a plugin.
 *
 * ```js
 * var md = new Remarkable();
 *
 * md.use(plugin1)
 *   .use(plugin2, opts)
 *   .use(plugin3);
 * ```
 *
 * @param  {Function} `plugin`
 * @param  {Object} `options`
 * @return {Object} `Remarkable` for chaining
 */


Remarkable.prototype.use = function (plugin, options) {
  plugin(this, options);
  return this;
};
/**
 * Parse the input `string` and return a tokens array.
 * Modifies `env` with definitions data.
 *
 * @param  {String} `string`
 * @param  {Object} `env`
 * @return {Array} Array of tokens
 */


Remarkable.prototype.parse = function (str, env) {
  var state = new StateCore(this, str, env);
  this.core.process(state);
  return state.tokens;
};
/**
 * The main `.render()` method that does all the magic :)
 *
 * @param  {String} `string`
 * @param  {Object} `env`
 * @return {String} Rendered HTML.
 */


Remarkable.prototype.render = function (str, env) {
  env = env || {};
  return this.renderer.render(this.parse(str, env), this.options, env);
};
/**
 * Parse the given content `string` as a single string.
 *
 * @param  {String} `string`
 * @param  {Object} `env`
 * @return {Array} Array of tokens
 */


Remarkable.prototype.parseInline = function (str, env) {
  var state = new StateCore(this, str, env);
  state.inlineMode = true;
  this.core.process(state);
  return state.tokens;
};
/**
 * Render a single content `string`, without wrapping it
 * to paragraphs
 *
 * @param  {String} `str`
 * @param  {Object} `env`
 * @return {String}
 */


Remarkable.prototype.renderInline = function (str, env) {
  env = env || {};
  return this.renderer.render(this.parseInline(str, env), this.options, env);
};

/**
 * Plugin for Remarkable Markdown processor which transforms $..$ and $$..$$ sequences into math HTML using the
 * Katex package.
 */

var rkatex = function rkatex(md, options) {
  var dollar = '$';
  var opts = options || {};
  var delimiter = opts.delimiter || dollar;

  if (delimiter.length !== 1) {
    throw new Error('invalid delimiter');
  }

  var katex = require$$0__default;
  /**
   * Render the contents as KaTeX
   */


  var renderKatex = function renderKatex(source, displayMode) {
    return katex.renderToString(source, {
      displayMode: displayMode,
      throwOnError: false
    });
  };
  /**
   * Parse '$$' as a block. Based off of similar method in remarkable.
   */


  var parseBlockKatex = function parseBlockKatex(state, startLine, endLine) {
    var haveEndMarker = false;
    var pos = state.bMarks[startLine] + state.tShift[startLine];
    var max = state.eMarks[startLine];

    if (pos + 1 > max) {
      return false;
    }

    var marker = state.src.charAt(pos);

    if (marker !== delimiter) {
      return false;
    } // scan marker length


    var mem = pos;
    pos = state.skipChars(pos, marker);
    var len = pos - mem;

    if (len !== 2) {
      return false;
    } // search end of block


    var nextLine = startLine;

    for (;;) {
      ++nextLine;

      if (nextLine >= endLine) {
        break;
      }

      pos = mem = state.bMarks[nextLine] + state.tShift[nextLine];
      max = state.eMarks[nextLine];

      if (pos < max && state.tShift[nextLine] < state.blkIndent) {
        break;
      }

      if (state.src.charAt(pos) !== delimiter) {
        continue;
      }

      if (state.tShift[nextLine] - state.blkIndent >= 4) {
        continue;
      }

      pos = state.skipChars(pos, marker);

      if (pos - mem < len) {
        continue;
      }

      pos = state.skipSpaces(pos);

      if (pos < max) {
        continue;
      }

      haveEndMarker = true;
      break;
    } // If a fence has heading spaces, they should be removed from its inner block


    len = state.tShift[startLine];
    state.line = nextLine + (haveEndMarker ? 1 : 0);
    var content = state.getLines(startLine + 1, nextLine, len, true).replace(/[ \n]+/g, ' ').trim();
    state.tokens.push({
      type: 'katex',
      params: null,
      content: content,
      lines: [startLine, state.line],
      level: state.level,
      block: true
    });
    return true;
  };
  /**
   * Look for '$' or '$$' spans in Markdown text. Based off of the 'fenced' parser in remarkable.
   */


  var parseInlineKatex = function parseInlineKatex(state, silent) {
    var start = state.pos;
    var max = state.posMax;
    var pos = start; // Unexpected starting character

    if (state.src.charAt(pos) !== delimiter) {
      return false;
    }

    ++pos;

    while (pos < max && state.src.charAt(pos) === delimiter) {
      ++pos;
    } // Capture the length of the starting delimiter -- closing one must match in size


    var marker = state.src.slice(start, pos);

    if (marker.length > 2) {
      return false;
    }

    var spanStart = pos;
    var escapedDepth = 0;

    while (pos < max) {
      var _char = state.src.charAt(pos);

      if (_char === '{') {
        escapedDepth += 1;
      } else if (_char === '}') {
        escapedDepth -= 1;

        if (escapedDepth < 0) {
          return false;
        }
      } else if (_char === delimiter && escapedDepth === 0) {
        var matchStart = pos;
        var matchEnd = pos + 1;

        while (matchEnd < max && state.src.charAt(matchEnd) === delimiter) {
          ++matchEnd;
        }

        if (matchEnd - matchStart === marker.length) {
          if (!silent) {
            var content = state.src.slice(spanStart, matchStart).replace(/[ \n]+/g, ' ').trim();
            state.push({
              type: 'katex',
              content: content,
              block: marker.length > 1,
              level: state.level
            });
          }

          state.pos = matchEnd;
          return true;
        }
      }

      pos += 1;
    }

    if (!silent) {
      state.pending += marker;
    }

    state.pos += marker.length;
    return true;
  };

  md.inline.ruler.push('katex', parseInlineKatex, options);
  md.block.ruler.push('katex', parseBlockKatex, options);

  md.renderer.rules.katex = function (tokens, idx) {
    return renderKatex(tokens[idx].content, tokens[idx].block);
  };

  md.renderer.rules.katex.delimiter = delimiter;
};

var remarkableKatex = rkatex;

let loading$1;

const autoload$1 = () => {
  loading$1 = loading$1 || loadJS([{
    type: 'script',
    data: {
      src: 'https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.js'
    }
  }]);
  return loading$1;
};

const name$1 = 'katex';
function transform$1(transformHooks) {
  transformHooks.parser.tap((md, features) => {
    md.use(remarkableKatex);

    const renderKatex = (source, displayMode) => {
      const {
        katex
      } = window;
      if (katex) return katex.renderToString(source, {
        displayMode,
        throwOnError: false
      });
      autoload$1().then(() => {
        transformHooks.retransform.call();
      });
      return source;
    };

    md.renderer.rules.katex = (tokens, idx) => {
      const result = renderKatex(tokens[idx].content, tokens[idx].block);
      features[name$1] = true;
      return result;
    };
  });
  return {
    styles: [{
      type: 'stylesheet',
      data: {
        href: 'https://cdn.jsdelivr.net/npm/katex@0.12.0/dist/katex.min.css'
      }
    }],
    scripts: [{
      type: 'iife',
      data: {
        fn: getMarkmap => {
          window.WebFontConfig = {
            custom: {
              families: ['KaTeX_AMS', 'KaTeX_Caligraphic:n4,n7', 'KaTeX_Fraktur:n4,n7', 'KaTeX_Main:n4,n7,i4,i7', 'KaTeX_Math:i4,i7', 'KaTeX_Script', 'KaTeX_SansSerif:n4,n7,i4', 'KaTeX_Size1', 'KaTeX_Size2', 'KaTeX_Size3', 'KaTeX_Size4', 'KaTeX_Typewriter']
            },
            active: () => {
              getMarkmap().refreshHook.call();
            }
          };
        },

        getParams({
          getMarkmap
        }) {
          return [getMarkmap];
        }

      }
    }, {
      type: 'script',
      data: {
        src: 'https://cdn.jsdelivr.net/npm/webfontloader@1.6.28/webfontloader.js',
        defer: true
      }
    }]
  };
}

var katex = /*#__PURE__*/Object.freeze({
__proto__: null,
name: name$1,
transform: transform$1
});

let loading;

const autoload = () => {
  loading = loading || loadJS([{
    type: 'script',
    data: {
      src: `https://cdn.jsdelivr.net/npm/prismjs@${"1.23.0"}/components/prism-core.min.js`
    }
  }, {
    type: 'script',
    data: {
      src: `https://cdn.jsdelivr.net/npm/prismjs@${"1.23.0"}/plugins/autoloader/prism-autoloader.min.js`
    }
  }]);
  return loading;
};

function loadLanguageAndRefresh(lang, transformHooks) {
  autoload().then(() => {
    window.Prism.plugins.autoloader.loadLanguages([lang], () => {
      transformHooks.retransform.call();
    });
  });
}

const name = 'prism';
function transform(transformHooks) {
  transformHooks.parser.tap((md, features) => {
    md.set({
      highlight: (str, lang) => {
        var _Prism$languages;

        features[name] = true;
        const {
          Prism
        } = window;
        const grammar = Prism == null ? void 0 : (_Prism$languages = Prism.languages) == null ? void 0 : _Prism$languages[lang];

        if (!grammar) {
          loadLanguageAndRefresh(lang, transformHooks);
          return '';
        }

        return Prism.highlight(str, grammar, lang);
      }
    });
  });
  return {
    styles: [{
      type: 'stylesheet',
      data: {
        href: `https://cdn.jsdelivr.net/npm/prismjs@${"1.23.0"}/themes/prism.css`
      }
    }]
  };
}

var prism = /*#__PURE__*/Object.freeze({
__proto__: null,
name: name,
transform: transform
});

function createTransformHooks() {
  return {
    parser: new Hook(),
    htmltag: new Hook(),

    /**
     * Indicate that the last transformation is not complete for reasons like
     * lack of resources and is called when it is ready for a new transformation.
     */
    retransform: new Hook()
  };
}

const plugins = [katex, prism];

function cleanNode(node, depth = 0) {
  if (node.t === 'heading') {
    // drop all paragraphs
    node.c = node.c.filter(item => item.t !== 'paragraph');
  } else if (node.t === 'list_item') {
    var _node$p;

    // keep first paragraph as content of list_item, drop others
    node.c = node.c.filter(item => {
      if (['paragraph', 'fence'].includes(item.t)) {
        if (!node.v) {
          node.v = item.v;
          node.p = _extends$1({}, node.p, item.p);
        }

        return false;
      }

      return true;
    });

    if (((_node$p = node.p) == null ? void 0 : _node$p.index) != null) {
      node.v = `${node.p.index}. ${node.v}`;
    }
  } else if (node.t === 'ordered_list') {
    var _node$p$start, _node$p2;

    let index = (_node$p$start = (_node$p2 = node.p) == null ? void 0 : _node$p2.start) != null ? _node$p$start : 1;
    node.c.forEach(item => {
      if (item.t === 'list_item') {
        item.p = _extends$1({}, item.p, {
          index
        });
        index += 1;
      }
    });
  }

  if (node.c.length === 0) {
    delete node.c;
  } else {
    node.c.forEach(child => cleanNode(child, depth + 1));

    if (node.c.length === 1 && !node.c[0].v) {
      node.c = node.c[0].c;
    }
  }

  node.d = depth;
}

class Transformer {
  constructor(plugins$1 = plugins) {
    this.plugins = void 0;
    this.hooks = void 0;
    this.md = void 0;
    this.assetsMap = void 0;
    this.plugins = plugins$1;
    this.hooks = createTransformHooks();
    const md = new Remarkable({
      html: true,
      breaks: true,
      maxNesting: Infinity
    });
    md.block.ruler.enable(['deflist']);
    md.renderer.rules.htmltag = wrapFunction(md.renderer.rules.htmltag, {
      after: ctx => {
        this.hooks.htmltag.call(ctx);
      }
    });
    this.md = md;
    const assetsMap = {};

    for (const {
      name,
      transform
    } of plugins$1) {
      assetsMap[name] = transform(this.hooks);
    }

    this.assetsMap = assetsMap;
  }

  buildTree(tokens) {

    const root = {
      t: 'root',
      d: 0,
      v: '',
      c: [],
      p: {}
    };
    const stack = [root];
    let depth = 0;

    for (const token of tokens) {
      let current = stack[stack.length - 1];

      if (token.type.endsWith('_open')) {
        const type = token.type.slice(0, -5);
        const payload = {};

        if (token.lines) {
          payload.lines = token.lines;
        }

        if (type === 'heading') {
          depth = token.hLevel;

          while (((_current = current) == null ? void 0 : _current.d) >= depth) {
            var _current;

            stack.pop();
            current = stack[stack.length - 1];
          }
        } else {
          var _current2;

          depth = Math.max(depth, ((_current2 = current) == null ? void 0 : _current2.d) || 0) + 1;

          if (type === 'ordered_list') {
            payload.start = token.order;
          }
        }

        const item = {
          t: type,
          d: depth,
          p: payload,
          v: '',
          c: []
        };
        current.c.push(item);
        stack.push(item);
      } else if (!current) {
        continue;
      } else if (token.type === `${current.t}_close`) {
        if (current.t === 'heading') {
          depth = current.d;
        } else {
          stack.pop();
          depth = 0;
        }
      } else if (token.type === 'inline') {
        const revoke = this.hooks.htmltag.tap(ctx => {
          const comment = ctx.result.match(/^<!--([\s\S]*?)-->$/);
          const data = comment == null ? void 0 : comment[1].trim();

          if (data === 'fold') {
            current.p.f = true;
            ctx.result = '';
          }
        });
        // const text = md.renderer.render([token], md.options, {});
        let text='';
        if(token.children&&token.children.length==1){
          if(token.children[0].type&&token.children[0].type=='link_open'){
            text = `[${token.children[1].content}](${token.children[0].href})`;
          }else {
            text = token.content.trim();
          // text = text.replace(/\n/g,"<br>");
          }
        }else {
          text = token.content.trim();
          // text = text.replace(/\n/g,"<br>");
        }
        revoke();
        current.v = `${current.v || ''}${text}`;
      } else if (token.type === 'fence') {
        // let result = md.renderer.render([token], md.options, {}); // Remarkable only adds className to `<code>` but not `<pre>`, copy it to make PrismJS style work.

        // const matches = result.match(/<code( class="[^"]*")>/);
        // if (matches) result = result.replace('<pre>', `<pre${matches[1]}>`);
        let result = '```'+ token.params + '\n';
        result = result + token.content;
        result = result+'```\n';

        current.c.push({
          t: token.type,
          d: depth + 1,
          v: result,
          c: []
        });
      } else ;
    }

    return root;
  }

  transform(content) {
    var _root$c;

    const features = {};
    this.hooks.parser.call(this.md, features);
    const tokens = this.md.parse(content || '', {});
    let root = this.buildTree(tokens);
    cleanNode(root);
    if (((_root$c = root.c) == null ? void 0 : _root$c.length) === 1) root = root.c[0];
    return {
      root,
      features
    };
  }
  /**
   * Get all assets from enabled plugins or filter them by plugin names as keys.
   */


  getAssets(keys) {
    var _keys;

    const styles = [];
    const scripts = [];
    (_keys = keys) != null ? _keys : keys = Object.keys(this.assetsMap);

    for (const assets of keys.map(key => this.assetsMap[key])) {
      if (assets) {
        if (assets.styles) styles.push(...assets.styles);
        if (assets.scripts) scripts.push(...assets.scripts);
      }
    }

    return {
      styles,
      scripts
    };
  }
  /**
   * Get used assets by features object returned by `transform`.
   */


  getUsedAssets(features) {
    return this.getAssets(Object.keys(features).filter(key => features[key]));
  }

}

exports.Transformer = Transformer;
exports.builtInPlugins = plugins;
exports.fillTemplate = fillTemplate;

})));
});

var domtoimage = createCommonjsModule(function (module) {
(function (global) {

    var util = newUtil();
    var inliner = newInliner();
    var fontFaces = newFontFaces();
    var images = newImages();

    // Default impl options
    var defaultOptions = {
        // Default is to fail on error, no placeholder
        imagePlaceholder: undefined,
        // Default cache bust is false, it will use the cache
        cacheBust: false
    };

    var domtoimage = {
        toSvg: toSvg,
        toPng: toPng,
        toJpeg: toJpeg,
        toBlob: toBlob,
        toPixelData: toPixelData,
        impl: {
            fontFaces: fontFaces,
            images: images,
            util: util,
            inliner: inliner,
            options: {}
        }
    };

    module.exports = domtoimage;


    /**
     * @param {Node} node - The DOM Node object to render
     * @param {Object} options - Rendering options
     * @param {Function} options.filter - Should return true if passed node should be included in the output
     *          (excluding node means excluding it's children as well). Not called on the root node.
     * @param {String} options.bgcolor - color for the background, any valid CSS color value.
     * @param {Number} options.width - width to be applied to node before rendering.
     * @param {Number} options.height - height to be applied to node before rendering.
     * @param {Object} options.style - an object whose properties to be copied to node's style before rendering.
     * @param {Number} options.quality - a Number between 0 and 1 indicating image quality (applicable to JPEG only),
                defaults to 1.0.
     * @param {String} options.imagePlaceholder - dataURL to use as a placeholder for failed images, default behaviour is to fail fast on images we can't fetch
     * @param {Boolean} options.cacheBust - set to true to cache bust by appending the time to the request url
     * @return {Promise} - A promise that is fulfilled with a SVG image data URL
     * */
    function toSvg(node, options) {
        options = options || {};
        copyOptions(options);
        return Promise.resolve(node)
            .then(function (node) {
                return cloneNode(node, options.filter, true);
            })
            .then(embedFonts)
            .then(inlineImages)
            .then(applyOptions)
            .then(function (clone) {
                return makeSvgDataUri(clone,
                    options.width || util.width(node),
                    options.height || util.height(node)
                );
            });

        function applyOptions(clone) {
            if (options.bgcolor) clone.style.backgroundColor = options.bgcolor;

            if (options.width) clone.style.width = options.width + 'px';
            if (options.height) clone.style.height = options.height + 'px';

            if (options.style)
                Object.keys(options.style).forEach(function (property) {
                    clone.style[property] = options.style[property];
                });

            return clone;
        }
    }

    /**
     * @param {Node} node - The DOM Node object to render
     * @param {Object} options - Rendering options, @see {@link toSvg}
     * @return {Promise} - A promise that is fulfilled with a Uint8Array containing RGBA pixel data.
     * */
    function toPixelData(node, options) {
        return draw(node, options || {})
            .then(function (canvas) {
                return canvas.getContext('2d').getImageData(
                    0,
                    0,
                    util.width(node),
                    util.height(node)
                ).data;
            });
    }

    /**
     * @param {Node} node - The DOM Node object to render
     * @param {Object} options - Rendering options, @see {@link toSvg}
     * @return {Promise} - A promise that is fulfilled with a PNG image data URL
     * */
    function toPng(node, options) {
        return draw(node, options || {})
            .then(function (canvas) {
                return canvas.toDataURL();
            });
    }

    /**
     * @param {Node} node - The DOM Node object to render
     * @param {Object} options - Rendering options, @see {@link toSvg}
     * @return {Promise} - A promise that is fulfilled with a JPEG image data URL
     * */
    function toJpeg(node, options) {
        options = options || {};
        return draw(node, options)
            .then(function (canvas) {
                return canvas.toDataURL('image/jpeg', options.quality || 1.0);
            });
    }

    /**
     * @param {Node} node - The DOM Node object to render
     * @param {Object} options - Rendering options, @see {@link toSvg}
     * @return {Promise} - A promise that is fulfilled with a PNG image blob
     * */
    function toBlob(node, options) {
        return draw(node, options || {})
            .then(util.canvasToBlob);
    }

    function copyOptions(options) {
        // Copy options to impl options for use in impl
        if(typeof(options.imagePlaceholder) === 'undefined') {
            domtoimage.impl.options.imagePlaceholder = defaultOptions.imagePlaceholder;
        } else {
            domtoimage.impl.options.imagePlaceholder = options.imagePlaceholder;
        }

        if(typeof(options.cacheBust) === 'undefined') {
            domtoimage.impl.options.cacheBust = defaultOptions.cacheBust;
        } else {
            domtoimage.impl.options.cacheBust = options.cacheBust;
        }
    }

    function draw(domNode, options) {
        return toSvg(domNode, options)
            .then(util.makeImage)
            .then(util.delay(100))
            .then(function (image) {
                var canvas = newCanvas(domNode);
                canvas.getContext('2d').drawImage(image, 0, 0);
                return canvas;
            });

        function newCanvas(domNode) {
            var canvas = document.createElement('canvas');
            canvas.width = options.width || util.width(domNode);
            canvas.height = options.height || util.height(domNode);

            if (options.bgcolor) {
                var ctx = canvas.getContext('2d');
                ctx.fillStyle = options.bgcolor;
                ctx.fillRect(0, 0, canvas.width, canvas.height);
            }

            return canvas;
        }
    }

    function cloneNode(node, filter, root) {
        if (!root && filter && !filter(node)) return Promise.resolve();

        return Promise.resolve(node)
            .then(makeNodeCopy)
            .then(function (clone) {
                return cloneChildren(node, clone, filter);
            })
            .then(function (clone) {
                return processClone(node, clone);
            });

        function makeNodeCopy(node) {
            if (node instanceof HTMLCanvasElement) return util.makeImage(node.toDataURL());
            return node.cloneNode(false);
        }

        function cloneChildren(original, clone, filter) {
            var children = original.childNodes;
            if (children.length === 0) return Promise.resolve(clone);

            return cloneChildrenInOrder(clone, util.asArray(children), filter)
                .then(function () {
                    return clone;
                });

            function cloneChildrenInOrder(parent, children, filter) {
                var done = Promise.resolve();
                children.forEach(function (child) {
                    done = done
                        .then(function () {
                            return cloneNode(child, filter);
                        })
                        .then(function (childClone) {
                            if (childClone) parent.appendChild(childClone);
                        });
                });
                return done;
            }
        }

        function processClone(original, clone) {
            if (!(clone instanceof Element)) return clone;
            if(!clone.style) return clone;

            return Promise.resolve()
                .then(cloneStyle)
                .then(clonePseudoElements)
                .then(copyUserInput)
                .then(fixSvg)
                .then(function () {
                    return clone;
                });

            function cloneStyle() {

                copyStyle(window.getComputedStyle(original), clone.style);

                function copyStyle(source, target) {
                    if (source.cssText) target.cssText = source.cssText;
                    else copyProperties(source, target);

                    function copyProperties(source, target) {
                        if(target.setProperty){
                            util.asArray(source).forEach(function (name) {
                                if(!source) return;
                                target.setProperty(
                                    name,
                                    source.getPropertyValue(name),
                                    source.getPropertyPriority(name)
                                );
                            });
                        }
                    }
                }
            }

            function clonePseudoElements() {
                [':before', ':after'].forEach(function (element) {
                    clonePseudoElement(element);
                });

                function clonePseudoElement(element) {
                    var style = window.getComputedStyle(original, element);
                    var content = style.getPropertyValue('content');

                    if (content === '' || content === 'none') return;

                    var className = util.uid();
                    clone.className = clone.className + ' ' + className;
                    var styleElement = document.createElement('style');
                    styleElement.appendChild(formatPseudoElementStyle(className, element, style));
                    clone.appendChild(styleElement);

                    function formatPseudoElementStyle(className, element, style) {
                        var selector = '.' + className + ':' + element;
                        var cssText = style.cssText ? formatCssText(style) : formatCssProperties(style);
                        return document.createTextNode(selector + '{' + cssText + '}');

                        function formatCssText(style) {
                            var content = style.getPropertyValue('content');
                            return style.cssText + ' content: ' + content + ';';
                        }

                        function formatCssProperties(style) {

                            return util.asArray(style)
                                .map(formatProperty)
                                .join('; ') + ';';

                            function formatProperty(name) {
                                return name + ': ' +
                                    style.getPropertyValue(name) +
                                    (style.getPropertyPriority(name) ? ' !important' : '');
                            }
                        }
                    }
                }
            }

            function copyUserInput() {
                if (original instanceof HTMLTextAreaElement) clone.innerHTML = original.value;
                if (original instanceof HTMLInputElement) clone.setAttribute("value", original.value);
            }

            function fixSvg() {
                if (!(clone instanceof SVGElement)) return;
                clone.setAttribute('xmlns', 'http://www.w3.org/2000/svg');

                if (!(clone instanceof SVGRectElement)) return;
                ['width', 'height'].forEach(function (attribute) {
                    var value = clone.getAttribute(attribute);
                    if (!value) return;
                     if(clone.style&&clone.style.setProperty){
                         clone.style.setProperty(attribute, value);
                     }
                });
            }
        }
    }

    function embedFonts(node) {
        return fontFaces.resolveAll()
            .then(function (cssText) {
                var styleNode = document.createElement('style');
                node.appendChild(styleNode);
                styleNode.appendChild(document.createTextNode(cssText));
                return node;
            });
    }

    function inlineImages(node) {
        return images.inlineAll(node)
            .then(function () {
                return node;
            });
    }

    function makeSvgDataUri(node, width, height) {
        return Promise.resolve(node)
            .then(function (node) {
                node.setAttribute('xmlns', 'http://www.w3.org/1999/xhtml');
                return new XMLSerializer().serializeToString(node);
            })
            .then(util.escapeXhtml)
            .then(function (xhtml) {
                return '<foreignObject x="0" y="0" width="100%" height="100%">' + xhtml + '</foreignObject>';
            })
            .then(function (foreignObject) {
                return '<svg xmlns="http://www.w3.org/2000/svg" width="' + width + '" height="' + height + '">' +
                    foreignObject + '</svg>';
            })
            .then(function (svg) {
                return 'data:image/svg+xml;charset=utf-8,' + svg;
            });
    }

    function newUtil() {
        return {
            escape: escape,
            parseExtension: parseExtension,
            mimeType: mimeType,
            dataAsUrl: dataAsUrl,
            isDataUrl: isDataUrl,
            canvasToBlob: canvasToBlob,
            resolveUrl: resolveUrl,
            getAndEncode: getAndEncode,
            uid: uid(),
            delay: delay,
            asArray: asArray,
            escapeXhtml: escapeXhtml,
            makeImage: makeImage,
            width: width,
            height: height
        };

        function mimes() {
            /*
             * Only WOFF and EOT mime types for fonts are 'real'
             * see http://www.iana.org/assignments/media-types/media-types.xhtml
             */
            var WOFF = 'application/font-woff';
            var JPEG = 'image/jpeg';

            return {
                'woff': WOFF,
                'woff2': WOFF,
                'ttf': 'application/font-truetype',
                'eot': 'application/vnd.ms-fontobject',
                'png': 'image/png',
                'jpg': JPEG,
                'jpeg': JPEG,
                'gif': 'image/gif',
                'tiff': 'image/tiff',
                'svg': 'image/svg+xml'
            };
        }

        function parseExtension(url) {
            var match = /\.([^\.\/]*?)$/g.exec(url);
            if (match) return match[1];
            else return '';
        }

        function mimeType(url) {
            var extension = parseExtension(url).toLowerCase();
            return mimes()[extension] || '';
        }

        function isDataUrl(url) {
            return url.search(/^(data:)/) !== -1;
        }

        function toBlob(canvas) {
            return new Promise(function (resolve) {
                var binaryString = window.atob(canvas.toDataURL().split(',')[1]);
                var length = binaryString.length;
                var binaryArray = new Uint8Array(length);

                for (var i = 0; i < length; i++)
                    binaryArray[i] = binaryString.charCodeAt(i);

                resolve(new Blob([binaryArray], {
                    type: 'image/png'
                }));
            });
        }

        function canvasToBlob(canvas) {
            if (canvas.toBlob)
                return new Promise(function (resolve) {
                    canvas.toBlob(resolve);
                });

            return toBlob(canvas);
        }

        function resolveUrl(url, baseUrl) {
            var doc = document.implementation.createHTMLDocument();
            var base = doc.createElement('base');
            doc.head.appendChild(base);
            var a = doc.createElement('a');
            doc.body.appendChild(a);
            base.href = baseUrl;
            a.href = url;
            return a.href;
        }

        function uid() {
            var index = 0;

            return function () {
                return 'u' + fourRandomChars() + index++;

                function fourRandomChars() {
                    /* see http://stackoverflow.com/a/6248722/2519373 */
                    return ('0000' + (Math.random() * Math.pow(36, 4) << 0).toString(36)).slice(-4);
                }
            };
        }

        function makeImage(uri) {
            return new Promise(function (resolve, reject) {
                var image = new Image();
                image.onload = function () {
                    resolve(image);
                };
                image.onerror = reject;
                image.src = uri;
            });
        }

        function getAndEncode(url) {
            var TIMEOUT = 30000;
            if(domtoimage.impl.options.cacheBust) {
                // Cache bypass so we dont have CORS issues with cached images
                // Source: https://developer.mozilla.org/en/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest#Bypassing_the_cache
                url += ((/\?/).test(url) ? "&" : "?") + (new Date()).getTime();
            }

            return new Promise(function (resolve) {
                var request = new XMLHttpRequest();

                request.onreadystatechange = done;
                request.ontimeout = timeout;
                request.responseType = 'blob';
                request.timeout = TIMEOUT;
                request.open('GET', url, true);
                request.send();

                var placeholder;
                if(domtoimage.impl.options.imagePlaceholder) {
                    var split = domtoimage.impl.options.imagePlaceholder.split(/,/);
                    if(split && split[1]) {
                        placeholder = split[1];
                    }
                }

                function done() {
                    if (request.readyState !== 4) return;

                    if (request.status !== 200) {
                        if(placeholder) {
                            resolve(placeholder);
                        } else {
                            fail('cannot fetch resource: ' + url + ', status: ' + request.status);
                        }

                        return;
                    }

                    var encoder = new FileReader();
                    encoder.onloadend = function () {
                        var content = encoder.result.split(/,/)[1];
                        resolve(content);
                    };
                    encoder.readAsDataURL(request.response);
                }

                function timeout() {
                    if(placeholder) {
                        resolve(placeholder);
                    } else {
                        fail('timeout of ' + TIMEOUT + 'ms occured while fetching resource: ' + url);
                    }
                }

                function fail(message) {
                    console.error(message);
                    resolve('');
                }
            });
        }

        function dataAsUrl(content, type) {
            return 'data:' + type + ';base64,' + content;
        }

        function escape(string) {
            return string.replace(/([.*+?^${}()|\[\]\/\\])/g, '\\$1');
        }

        function delay(ms) {
            return function (arg) {
                return new Promise(function (resolve) {
                    setTimeout(function () {
                        resolve(arg);
                    }, ms);
                });
            };
        }

        function asArray(arrayLike) {
            var array = [];
            var length = arrayLike.length;
            for (var i = 0; i < length; i++) array.push(arrayLike[i]);
            return array;
        }

        function escapeXhtml(string) {
            return string.replace(/#/g, '%23').replace(/\n/g, '%0A');
        }

        function width(node) {
            var leftBorder = px(node, 'border-left-width');
            var rightBorder = px(node, 'border-right-width');
            return node.scrollWidth + leftBorder + rightBorder;
        }

        function height(node) {
            var topBorder = px(node, 'border-top-width');
            var bottomBorder = px(node, 'border-bottom-width');
            return node.scrollHeight + topBorder + bottomBorder;
        }

        function px(node, styleProperty) {
            var value = window.getComputedStyle(node).getPropertyValue(styleProperty);
            return parseFloat(value.replace('px', ''));
        }
    }

    function newInliner() {
        var URL_REGEX = /url\(['"]?([^'"]+?)['"]?\)/g;

        return {
            inlineAll: inlineAll,
            shouldProcess: shouldProcess,
            impl: {
                readUrls: readUrls,
                inline: inline
            }
        };

        function shouldProcess(string) {
            return string.search(URL_REGEX) !== -1;
        }

        function readUrls(string) {
            var result = [];
            var match;
            while ((match = URL_REGEX.exec(string)) !== null) {
                result.push(match[1]);
            }
            return result.filter(function (url) {
                return !util.isDataUrl(url);
            });
        }

        function inline(string, url, baseUrl, get) {
            return Promise.resolve(url)
                .then(function (url) {
                    return baseUrl ? util.resolveUrl(url, baseUrl) : url;
                })
                .then(get || util.getAndEncode)
                .then(function (data) {
                    return util.dataAsUrl(data, util.mimeType(url));
                })
                .then(function (dataUrl) {
                    return string.replace(urlAsRegex(url), '$1' + dataUrl + '$3');
                });

            function urlAsRegex(url) {
                return new RegExp('(url\\([\'"]?)(' + util.escape(url) + ')([\'"]?\\))', 'g');
            }
        }

        function inlineAll(string, baseUrl, get) {
            if (nothingToInline()) return Promise.resolve(string);

            return Promise.resolve(string)
                .then(readUrls)
                .then(function (urls) {
                    var done = Promise.resolve(string);
                    urls.forEach(function (url) {
                        done = done.then(function (string) {
                            return inline(string, url, baseUrl, get);
                        });
                    });
                    return done;
                });

            function nothingToInline() {
                return !shouldProcess(string);
            }
        }
    }

    function newFontFaces() {
        return {
            resolveAll: resolveAll,
            impl: {
                readAll: readAll
            }
        };

        function resolveAll() {
            return readAll()
                .then(function (webFonts) {
                    return Promise.all(
                        webFonts.map(function (webFont) {
                            return webFont.resolve();
                        })
                    );
                })
                .then(function (cssStrings) {
                    return cssStrings.join('\n');
                });
        }

        function readAll() {
            return Promise.resolve(util.asArray(document.styleSheets))
                .then(getCssRules)
                .then(selectWebFontRules)
                .then(function (rules) {
                    return rules.map(newWebFont);
                });

            function selectWebFontRules(cssRules) {
                return cssRules
                    .filter(function (rule) {
                        return rule.type === CSSRule.FONT_FACE_RULE;
                    })
                    .filter(function (rule) {
                        return inliner.shouldProcess(rule.style.getPropertyValue('src'));
                    });
            }

            function getCssRules(styleSheets) {
                var cssRules = [];
                styleSheets.forEach(function (sheet) {
                    try {
                        util.asArray(sheet.cssRules || []).forEach(cssRules.push.bind(cssRules));
                    } catch (e) {
                        console.log('Error while reading CSS rules from ' + sheet.href, e.toString());
                    }
                });
                return cssRules;
            }

            function newWebFont(webFontRule) {
                return {
                    resolve: function resolve() {
                        var baseUrl = (webFontRule.parentStyleSheet || {}).href;
                        return inliner.inlineAll(webFontRule.cssText, baseUrl);
                    },
                    src: function () {
                        return webFontRule.style.getPropertyValue('src');
                    }
                };
            }
        }
    }

    function newImages() {
        return {
            inlineAll: inlineAll,
            impl: {
                newImage: newImage
            }
        };

        function newImage(element) {
            return {
                inline: inline
            };

            function inline(get) {
                if (util.isDataUrl(element.src)) return Promise.resolve();

                return Promise.resolve(element.src)
                    .then(get || util.getAndEncode)
                    .then(function (data) {
                        return util.dataAsUrl(data, util.mimeType(element.src));
                    })
                    .then(function (dataUrl) {
                        return new Promise(function (resolve, reject) {
                            element.onload = resolve;
                            element.onerror = reject;
                            element.src = dataUrl;
                        });
                    });
            }
        }

        function inlineAll(node) {
            if (!(node instanceof Element)) return Promise.resolve(node);

            return inlineBackground(node)
                .then(function () {
                    if (node instanceof HTMLImageElement)
                        return newImage(node).inline();
                    else
                        return Promise.all(
                            util.asArray(node.childNodes).map(function (child) {
                                return inlineAll(child);
                            })
                        );
                });

            function inlineBackground(node) {
                if(!node.style){
                    return Promise.resolve(node);
                }
                var background = node.style.getPropertyValue('background');

                if (!background) return Promise.resolve(node);

                return inliner.inlineAll(background)
                    .then(function (inlined) {
                        if(node.style&&node.style.setProperty){
                            node.style.setProperty(
                                'background',
                                inlined,
                                node.style.getPropertyPriority('background')
                            );
                        }
                    })
                    .then(function () {
                        return node;
                    });
            }
        }
    }
})();
});

function uuid() {
    function S4() {
        return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
    }
    return (S4() + S4() + '-' + S4() + '-' + S4());
}
const transformer = new browser.Transformer();
const mindmapViewType = "mindmapView";
const mindmapIcon = "blocks";
class MindMapView extends obsidian.TextFileView {
    getViewType() {
        return mindmapViewType;
    }
    getIcon() {
        return mindmapIcon;
    }
    getDisplayText() {
        var _a;
        return ((_a = this.file) === null || _a === void 0 ? void 0 : _a.basename) || "mindmap";
    }
    setColors() {
        var colors = [];
        try {
            if (this.plugin.settings.strokeArray) {
                colors = this.plugin.settings.strokeArray.split(',');
            }
        }
        catch (err) {
            console.log(err, 'stroke array is error');
        }
        this.colors = this.colors.concat(colors);
        for (var i = 0; i < 50; i++) {
            this.colors.push(randomColor());
        }
    }
    exportToSvg() {
        if (!this.mindmap) {
            return;
        }
        // this.mindmap.contentEL.style.visibility='hidden';
        var nodes = [];
        this.mindmap.traverseDF((n) => {
            if (n.isShow()) {
                nodes.push(n);
            }
        });
        var oldScrollLeft = this.mindmap.containerEL.scrollLeft;
        var oldScrollTop = this.mindmap.containerEL.scrollTop;
        var box = this.mindmap.getBoundingRect(nodes);
        var rootBox = this.mindmap.root.getPosition();
        var disX = 0, disY = 0;
        if (box.x > 60) {
            disX = box.x - 60;
        }
        if (box.y > 60) {
            disY = box.y - 60;
        }
        this.mindmap.root.setPosition(rootBox.x - disX, rootBox.y - disY);
        this.mindmap.refresh();
        var w = box.width + 120;
        var h = box.height + 120;
        this.mindmap.contentEL.style.width = w + 'px';
        this.mindmap.contentEL.style.height = h + 'px';
        setTimeout(() => {
            domtoimage.toPng(this.mindmap.contentEL).then(dataUrl => {
                var img = new Image();
                img.src = dataUrl;
                var str = img.outerHTML;
                var p = this.mindmap.path.substr(0, this.mindmap.path.length - 2);
                try {
                    new obsidian.Notice(p + 'html');
                    this.app.vault.adapter.write(p + 'html', str);
                    this.restoreMindmap(rootBox, oldScrollLeft, oldScrollTop);
                }
                catch (err) {
                    this.restoreMindmap(rootBox, oldScrollLeft, oldScrollTop);
                    new obsidian.Notice(err);
                }
            }).catch(err => {
                this.restoreMindmap(rootBox, oldScrollLeft, oldScrollTop);
                new obsidian.Notice(err);
            });
        }, 200);
    }
    restoreMindmap(rootBox, left, top) {
        if (this.mindmap) {
            var size = this.plugin.settings.canvasSize;
            this.mindmap.contentEL.style.width = size + 'px';
            this.mindmap.contentEL.style.height = size + 'px';
            this.mindmap.containerEL.scrollTop = top;
            this.mindmap.containerEL.scrollLeft = left;
            this.mindmap.root.setPosition(rootBox.x, rootBox.y);
            this.mindmap.refresh();
            //   this.mindmap.contentEL.style.visibility='visible';
        }
    }
    mindMapChange() {
        if (this.mindmap) {
            var md = this.mindmap.getMarkdown();
            //  var matchArray: string[] = []
            // var collapsedIds: string[] = []
            // const idRegexMultiline = /.+ \^([a-z0-9\-]+)$/gim
            // while ((matchArray = idRegexMultiline.exec(md)) != null) {
            //   collapsedIds = [...collapsedIds, ...matchArray.slice(1, 2)];
            // }
            // this.fileCache.frontmatter.collapsedIds='';
            // if (collapsedIds.length > 0) {
            //   this.fileCache.frontmatter.collapsedIds = collapsedIds;
            // }
            //var frontMatter = this.getFrontMatter();
            this.data = this.yamlString + md;
            // console.log(this.mindmap.path);
            // this.app.vault.adapter.write(this.mindmap.path, this.data);
            try {
                this.requestSave();
                //new Notice(`${t("Save success")}`);
            }
            catch (err) {
                console.log(err);
                new obsidian.Notice(`${t("Save fail")}`);
            }
        }
    }
    getFrontMatter() {
        var frontMatter = '---\n\n';
        //  var v: any = '';
        if (this.fileCache.frontmatter) {
            // for (var k in this.fileCache.frontmatter) {
            //   if (k != 'position') {
            //     if (Object.prototype.toString.call(this.fileCache.frontmatter[k]) == '[object Array]' || Object.prototype.toString.call(this.fileCache.frontmatter[k]) == '[object Object]') {
            //       v = JSON.stringify(this.fileCache.frontmatter[k]);
            //     } else if (Object.prototype.toString.call(this.fileCache.frontmatter[k]) == '[object Number]' || Object.prototype.toString.call(this.fileCache.frontmatter[k]) == "[object String]") {
            //       v = this.fileCache.frontmatter[k];
            //     }
            //     if (v) {
            //       frontMatter += `${k}: ${v}\n`;
            //     }
            //   }
            // }
            var position = this.fileCache.frontmatterPosition;
            var end = position['end'].offset;
            frontMatter = this.data.substr(0, end);
        }
        frontMatter += '\n\n';
        //frontMatter += `\n---\n\n`;
        return frontMatter;
    }
    constructor(leaf, plugin) {
        super(leaf);
        this.id = this.leaf.id;
        this.colors = [];
        this.timeOut = null;
        this.firstInit = true;
        this.yamlString = '';
        this.plugin = plugin;
        this.setColors();
        this.fileCache = {
            'frontmatter': {
                'mindmap-plugin': 'basic'
            }
        };
    }
    onClose() {
        return __awaiter(this, void 0, void 0, function* () {
            // Remove draggables from render, as the DOM has already detached
            //this.plugin.removeView(this);
            if (this.mindmap) {
                this.mindmap.clear();
                this.contentEl.innerHTML = '';
                this.mindmap = null;
            }
        });
    }
    clear() {
    }
    getViewData() {
        return this.data;
    }
    setViewData(data) {
        if (this.mindmap) {
            this.mindmap.clear();
            this.contentEl.innerHTML = '';
        }
        this.data = data;
        var mdText = this.getMdText(this.data);
        var mindData = this.mdToData(mdText);
        mindData.isRoot = true;
        // const frontmatterContentRegExResult = /^---$(.+?)^---$.+?/mis.exec(data)
        // if (frontmatterContentRegExResult != null && frontmatterContentRegExResult[1]) {
        //   frontmatterContentRegExResult[1].split('\n').forEach((frontmatterLine) => {
        //     const keyValue = frontmatterLine.split(': ')
        //     if (keyValue.length === 2) {
        //       const value = /^[{\[].+[}\]]$/.test(keyValue[1]) ? JSON.parse(keyValue[1]) : keyValue[1]
        //       this.fileCache.frontmatter[keyValue[0]] = value
        //     }
        //   });
        // }
        this.mindmap = new MindMap(mindData, this.contentEl, this.plugin.settings);
        this.mindmap.colors = this.colors;
        if (this.firstInit) {
            setTimeout(() => {
                var leaf = this.leaf;
                if (leaf) {
                    var view = leaf.view;
                    this.mindmap.path = view === null || view === void 0 ? void 0 : view.file.path;
                    if (view.file) {
                        this.fileCache = this.app.metadataCache.getFileCache(view.file);
                        this.yamlString = this.getFrontMatter();
                    }
                }
                this.mindmap.init();
                this.mindmap.refresh();
                this.mindmap.view = this;
                this.firstInit = false;
            }, 100);
        }
        else {
            var view = this.leaf.view;
            this.fileCache = this.app.metadataCache.getFileCache(view.file);
            this.yamlString = this.getFrontMatter();
            this.mindmap.path = view === null || view === void 0 ? void 0 : view.file.path;
            this.mindmap.init();
            this.mindmap.refresh();
            this.mindmap.view = this;
        }
    }
    onunload() {
        this.app.workspace.offref("quick-preview");
        this.app.workspace.offref("resize");
        if (this.mindmap) {
            this.mindmap.clear();
            this.contentEl.innerHTML = '';
            this.mindmap = null;
        }
        this.plugin.setMarkdownView(this.leaf);
    }
    onload() {
        super.onload();
        this.registerEvent(this.app.workspace.on("quick-preview", () => this.onQuickPreview, this));
        this.registerEvent(this.app.workspace.on('resize', () => this.updateMindMap(), this));
    }
    onQuickPreview(file, data) {
        if (file === this.file && data !== this.data) {
            this.setViewData(data);
            this.fileCache = this.app.metadataCache.getFileCache(file);
        }
    }
    updateMindMap() {
        if (this.mindmap) {
            if (obsidian.Platform.isDesktopApp) {
                this.mindmap.center();
            }
        }
    }
    onFileMetadataChange(file) {
        return __awaiter(this, void 0, void 0, function* () {
            var path = file.path;
            let md = yield this.app.vault.adapter.read(path);
            this.onQuickPreview(file, md);
        });
    }
    getMdText(str) {
        var md = str.trim().replace(FRONT_MATTER_REGEX, '');
        return md.trim();
    }
    mdToData(str) {
        var _a;
        function transformData(mapData) {
            var flag = true;
            if (mapData.t == 'blockquote') {
                mapData = mapData.c[0];
                flag = false;
                mapData.v = '> ' + mapData.v;
            }
            const regexResult = /^.+ \^([a-z0-9\-]+)$/gim.exec(mapData.v);
            const id = regexResult != null ? regexResult[1] : null;
            // console.log(id);
            var map = {
                id: id || uuid(),
                text: id ? mapData.v.replace(` ^${id}`, '') : mapData.v,
                children: [],
                expanded: id ? false : true
            };
            if (flag && mapData.c && mapData.c.length) {
                mapData.c.forEach((data) => {
                    map.children.push(transformData(data));
                });
            }
            return map;
        }
        if (str) {
            const { root } = transformer.transform(str);
            const data = transformData(root);
            return data;
        }
        else {
            return {
                id: uuid(),
                text: ((_a = this.app.workspace.getActiveFile()) === null || _a === void 0 ? void 0 : _a.basename) || `${t('Untitled mindmap')}`
            };
        }
    }
    onMoreOptionsMenu(menu) {
        // Add a menu item to force the board to markdown view
        menu
            .addItem((item) => {
            item
                .setTitle(`${t("Open as markdown")}`)
                .setIcon("document")
                .onClick(() => {
                this.plugin.mindmapFileModes[this.id || this.file.path] = "markdown";
                this.plugin.setMarkdownView(this.leaf);
            });
        });
        // .addItem((item)=>{
        //    item
        //    .setTitle(`${t("Export to opml")}`)
        //    .setIcon('image-file')
        //    .onClick(()=>{
        //       const targetFolder = this.plugin.app.fileManager.getNewFileParent(
        //        this.plugin.app.workspace.getActiveFile()?.path || ""
        //       );
        //       if(targetFolder){
        //         console.log(targetFolder,this.plugin.app.fileManager);
        //       }
        //    })
        // })
        super.onMoreOptionsMenu(menu);
    }
}

class MindMapSettingsTab extends obsidian.PluginSettingTab {
    constructor(app, plugin) {
        super(app, plugin);
        this.plugin = plugin;
    }
    display() {
        const { containerEl } = this;
        containerEl.empty();
        new obsidian.Setting(containerEl)
            .setName(`${t('Canvas size')}`)
            .setDesc(`${t('Canvas size desc')}`)
            .addDropdown(dropDown => dropDown
            .addOption('4000', '4000')
            .addOption('6000', '6000')
            .addOption('8000', '8000')
            .addOption('10000', '10000')
            .addOption('12000', '12000')
            .addOption('16000', '16000')
            .addOption('20000', '20000')
            .addOption('30000', '30000')
            .addOption('36000', '36000')
            .setValue(this.plugin.settings.canvasSize.toString() || '8000')
            .onChange((value) => {
            var _v = Number.parseInt(value);
            this.plugin.settings.canvasSize = _v;
            this.plugin.saveData(this.plugin.settings);
            const mindmapLeaves = this.app.workspace.getLeavesOfType(mindmapViewType);
            mindmapLeaves.forEach((leaf) => {
                var v = leaf.view;
                v.mindmap.setting.canvasSize = _v;
                v.mindmap.setAppSetting();
                var box = v.mindmap.root.getBox();
                v.mindmap.root.setPosition(_v / 2 - box.width / 2, _v / 2 - box.height / 2);
                v.mindmap.refresh();
                v.mindmap.center();
            });
        }));
        new obsidian.Setting(containerEl)
            .setName(`${t('Canvas background')}`)
            .setDesc(`${t('Canvas background desc')}`)
            .addText(text => text
            .setValue(this.plugin.settings.background || 'transparent')
            .setPlaceholder('Example: black|white|#ccc')
            .onChange((value) => {
            this.plugin.settings.background = value;
            this.plugin.saveData(this.plugin.settings);
            const mindmapLeaves = this.app.workspace.getLeavesOfType(mindmapViewType);
            mindmapLeaves.forEach((leaf) => {
                var v = leaf.view;
                v.mindmap.setting.background = this.plugin.settings.background;
                v.mindmap.setAppSetting();
            });
        }));
        new obsidian.Setting(containerEl)
            .setName(`${t('Max level of node to markdown head')}`)
            .setDesc(`${t('Max level of node to markdown head desc')}`)
            .addDropdown(dropDown => dropDown
            .addOption('0', '0')
            .addOption('1', '1')
            .addOption('2', '2')
            .addOption('3', '3')
            .addOption('4', '4')
            .addOption('5', '5')
            .addOption('6', '6')
            .setValue(this.plugin.settings.headLevel.toString() || '2')
            .onChange((value) => {
            this.plugin.settings.headLevel = Number.parseInt(value);
            this.plugin.saveData(this.plugin.settings);
            const mindmapLeaves = this.app.workspace.getLeavesOfType(mindmapViewType);
            mindmapLeaves.forEach((leaf) => {
                var v = leaf.view;
                v.mindmap.setting.headLevel = this.plugin.settings.headLevel;
            });
        }));
        new obsidian.Setting(containerEl)
            .setName(`${t('Font size')}`)
            .setDesc(`${t('Font size desc')}`)
            .addText(text => {
            var _a;
            return text
                .setValue(((_a = this.plugin.settings.fontSize) === null || _a === void 0 ? void 0 : _a.toString()) || '16')
                .setPlaceholder('Example: 16')
                .onChange((value) => {
                this.plugin.settings.fontSize = Number.parseInt(value);
                this.plugin.saveData(this.plugin.settings);
                const mindmapLeaves = this.app.workspace.getLeavesOfType(mindmapViewType);
                mindmapLeaves.forEach((leaf) => {
                    var v = leaf.view;
                    v.mindmap.setting.fontSize = this.plugin.settings.fontSize;
                    v.mindmap.setAppSetting();
                    v.mindmap.traverseBF((n) => {
                        n.boundingRect = null;
                        n.refreshBox();
                    });
                    v.mindmap.refresh();
                });
            });
        });
        new obsidian.Setting(containerEl)
            .setName(`${t('Mind map layout direct')}`)
            .setDesc(`${t('Mind map layout direct desc')}`)
            .addDropdown(dropDown => dropDown
            .addOption('mind map', t('Centered'))
            .addOption('right', t('Right'))
            .addOption('left', t('Left'))
            .addOption('clockwise', t('Clockwise'))
            .setValue(this.plugin.settings.layoutDirect.toString() || 'mind map')
            .onChange((value) => {
            this.plugin.settings.layoutDirect = value;
            this.plugin.saveData(this.plugin.settings);
            const mindmapLeaves = this.app.workspace.getLeavesOfType(mindmapViewType);
            mindmapLeaves.forEach((leaf) => {
                var v = leaf.view;
                v.mindmap.setting.layoutDirect = this.plugin.settings.layoutDirect;
                v.mindmap.refresh();
            });
        }));
        new obsidian.Setting(containerEl)
            .setName(`${t('Stroke Array')}`)
            .setDesc(`${t('Stroke Array Desc')}`)
            .addText(text => {
            var _a;
            return text
                .setValue(((_a = this.plugin.settings.strokeArray) === null || _a === void 0 ? void 0 : _a.toString()) || '')
                .setPlaceholder('Example: red,orange,blue ...')
                .onChange((value) => {
                this.plugin.settings.strokeArray = value;
                this.plugin.saveData(this.plugin.settings);
                const mindmapLeaves = this.app.workspace.getLeavesOfType(mindmapViewType);
                mindmapLeaves.forEach((leaf) => {
                    var v = leaf.view;
                    v.mindmap.setting.strokeArray = this.plugin.settings.strokeArray.split(',');
                    if (v.mindmap.mmLayout) {
                        v.mindmap.mmLayout.colors = v.mindmap.setting.strokeArray;
                    }
                    v.mindmap.traverseBF((n) => {
                        n.boundingRect = null;
                        n.refreshBox();
                    });
                    v.mindmap.refresh();
                });
            });
        });
    }
}

class MindMapPlugin extends obsidian.Plugin {
    constructor() {
        super(...arguments);
        this.mindmapFileModes = {};
        this._loaded = false;
        this.timeOut = null;
    }
    onload() {
        return __awaiter(this, void 0, void 0, function* () {
            yield this.loadSettings();
            this.addCommand({
                id: 'Create New MindMap',
                name: `${t('Create new mindmap')}`,
                checkCallback: (checking) => {
                    var _a;
                    let leaf = this.app.workspace.activeLeaf;
                    if (leaf) {
                        if (!checking) {
                            const targetFolder = this.app.fileManager.getNewFileParent(((_a = this.app.workspace.getActiveFile()) === null || _a === void 0 ? void 0 : _a.path) || "");
                            if (targetFolder) {
                                this.newMindMap(targetFolder);
                            }
                        }
                        return true;
                    }
                    return false;
                }
            });
            this.addCommand({
                id: 'Toggle to markdown or mindmap',
                name: `${t('Toggle markdown/mindmap')}`,
                mobileOnly: false,
                callback: () => {
                    const mindmapView = this.app.workspace.getActiveViewOfType(MindMapView);
                    const markdownView = this.app.workspace.getActiveViewOfType(obsidian.MarkdownView);
                    if (mindmapView != null) {
                        this.mindmapFileModes[mindmapView.leaf.id || mindmapView.file.path] = 'markdown';
                        this.setMarkdownView(mindmapView.leaf);
                    }
                    else if (markdownView != null) {
                        this.mindmapFileModes[markdownView.leaf.id || markdownView.file.path] = mindmapViewType;
                        this.setMarkdownView(markdownView.leaf);
                    }
                }
            });
            this.addCommand({
                id: 'Copy Node',
                name: `${t('Copy node')}`,
                callback: () => {
                    const mindmapView = this.app.workspace.getActiveViewOfType(MindMapView);
                    if (mindmapView) {
                        var mindmap = mindmapView.mindmap;
                        navigator.clipboard.writeText('');
                        var node = mindmap.selectNode;
                        if (node) {
                            var text = mindmap.copyNode(node);
                            navigator.clipboard.writeText(text);
                        }
                    }
                }
            });
            this.addCommand({
                id: 'Paste Node',
                name: `${t('Paste node')}`,
                callback: () => {
                    const mindmapView = this.app.workspace.getActiveViewOfType(MindMapView);
                    if (mindmapView) {
                        var mindmap = mindmapView.mindmap;
                        navigator.clipboard.readText().then(text => {
                            mindmap.pasteNode(text);
                        });
                    }
                }
            });
            this.addCommand({
                id: 'Export to html',
                name: `${t('Export to html')}`,
                callback: () => {
                    const mindmapView = this.app.workspace.getActiveViewOfType(MindMapView);
                    if (mindmapView) {
                        mindmapView.exportToSvg();
                    }
                }
            });
            this.registerView(mindmapViewType, (leaf) => new MindMapView(leaf, this));
            this.registerEvents();
            this.registerMonkeyAround();
            this.addSettingTab(new MindMapSettingsTab(this.app, this));
        });
    }
    onunload() {
        this.app.workspace.detachLeavesOfType(mindmapViewType);
        //this.app.workspace.unregisterHoverLinkSource(frontMatterKey);
    }
    newMindMap(folder) {
        var _a;
        return __awaiter(this, void 0, void 0, function* () {
            const targetFolder = folder
                ? folder
                : this.app.fileManager.getNewFileParent(((_a = this.app.workspace.getActiveFile()) === null || _a === void 0 ? void 0 : _a.path) || "");
            try {
                // @ts-ignore
                const mindmap = yield this.app.fileManager.createNewMarkdownFile(targetFolder, `${t('Untitled mindmap')}`);
                yield this.app.vault.modify(mindmap, basicFrontmatter);
                setTimeout(() => __awaiter(this, void 0, void 0, function* () {
                    yield this.app.workspace.getLeaf().setViewState({
                        type: mindmapViewType,
                        state: { file: mindmap.path },
                    });
                }), 100);
            }
            catch (e) {
                console.error("Error creating mindmap board:", e);
            }
        });
    }
    loadSettings() {
        return __awaiter(this, void 0, void 0, function* () {
            this.settings = Object.assign({
                canvasSize: 8000,
                headLevel: 2,
                fontSize: 16,
                background: 'transparent',
                layout: 'mindmap',
                layoutDirect: 'mindmap'
            }, yield this.loadData());
        });
    }
    saveSettings() {
        return __awaiter(this, void 0, void 0, function* () {
            yield this.saveData(this.settings);
        });
    }
    setMarkdownView(leaf) {
        return __awaiter(this, void 0, void 0, function* () {
            yield leaf.setViewState({
                type: "markdown",
                state: leaf.view.getState(),
                popstate: true,
            }, { focus: true });
        });
    }
    setMindMapView(leaf) {
        return __awaiter(this, void 0, void 0, function* () {
            yield leaf.setViewState({
                type: mindmapViewType,
                state: leaf.view.getState(),
                popstate: true,
            });
        });
    }
    registerEvents() {
        this.registerEvent(this.app.workspace.on("file-menu", (menu, file, source, leaf) => {
            // Add a menu item to the folder context menu to create a board
            if (file instanceof obsidian.TFolder) {
                menu.addItem((item) => {
                    item
                        .setTitle(`${t('New mindmap board')}`)
                        .setIcon('document')
                        .onClick(() => this.newMindMap(file));
                });
            }
            //add markdown view menu  open as mind map view
            if (leaf && this.mindmapFileModes[leaf.id || file.path] == 'markdown') {
                const cache = this.app.metadataCache.getFileCache(file);
                if ((cache === null || cache === void 0 ? void 0 : cache.frontmatter) && cache.frontmatter[frontMatterKey]) {
                    menu.addItem((item) => {
                        item
                            .setTitle(`${t('Open as mindmap board')}`)
                            .setIcon("document")
                            .onClick(() => {
                            this.mindmapFileModes[leaf.id || file.path] = mindmapViewType;
                            this.setMindMapView(leaf);
                        });
                    }).addSeparator();
                }
            }
        }));
        this.registerEvent(this.app.metadataCache.on("changed", (file) => {
            this.app.workspace.getLeavesOfType(mindmapViewType).forEach((leaf) => {
                const view = leaf.view;
                view.onFileMetadataChange(file);
            });
        }));
        // @ts-ignore
        // this.app.workspace.registerHoverLinkSource(frontMatterKey, {
        //   display: mindmapViewType,
        //   defaultMod: true,
        // });
    }
    registerMonkeyAround() {
        const self = this;
        this.register(around(obsidian.WorkspaceLeaf.prototype, {
            // Kanbans can be viewed as markdown or kanban, and we keep track of the mode
            // while the file is open. When the file closes, we no longer need to keep track of it.
            detach(next) {
                return function () {
                    var _a;
                    const state = (_a = this.view) === null || _a === void 0 ? void 0 : _a.getState();
                    if ((state === null || state === void 0 ? void 0 : state.file) && self.mindmapFileModes[this.id || state.file]) {
                        delete self.mindmapFileModes[this.id || state.file];
                    }
                    return next.apply(this);
                };
            },
            setViewState(next) {
                return function (state, ...rest) {
                    var _a;
                    // new Notice( state.type);
                    if (self._loaded &&
                        state.type === "markdown" &&
                        ((_a = state.state) === null || _a === void 0 ? void 0 : _a.file) &&
                        // And the current mode of the file is not set to markdown
                        self.mindmapFileModes[this.id || state.state.file] !== "markdown") {
                        // Then check for the kanban frontMatterKey
                        const cache = self.app.metadataCache.getCache(state.state.file);
                        //   new Notice(cache.frontmatter[frontMatterKey]);
                        if ((cache === null || cache === void 0 ? void 0 : cache.frontmatter) && cache.frontmatter[frontMatterKey]) {
                            // If we have it, force the view type to kanban
                            const newState = Object.assign(Object.assign({}, state), { type: mindmapViewType });
                            self.mindmapFileModes[state.state.file] = mindmapViewType;
                            return next.apply(this, [newState, ...rest]);
                        }
                    }
                    return next.apply(this, [state, ...rest]);
                };
            },
        }));
        // this.register(
        //   around(MarkdownView.prototype, {
        //     onMoreOptionsMenu(next) {
        //       return function (menu: Menu) {
        //         const file = this.file;
        //         const cache = file
        //           ? self.app.metadataCache.getFileCache(file)
        //           : null;
        //         if (
        //           !file ||
        //           !cache?.frontmatter ||
        //           !cache.frontmatter[frontMatterKey]
        //         ) {
        //           return next.call(this, menu);
        //         }
        //         menu
        //           .addItem((item) => {
        //             item
        //               .setTitle(`${t('Open as mindmap board')}`)
        //               .setIcon("document")
        //               .onClick(() => {
        //                 self.mindmapFileModes[this.leaf.id || file.path] =
        //                   mindmapViewType;
        //                 self.setMindMapView(this.leaf);
        //               });
        //           })
        //           .addSeparator();
        //         next.call(this, menu);
        //       };
        //     },
        //   })
        // );
    }
}

module.exports = MindMapPlugin;
