560 lines
22 KiB
JavaScript
560 lines
22 KiB
JavaScript
define([
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'jquery',
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'/api/config',
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'/bower_components/marked/marked.min.js',
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'/common/common-hash.js',
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'/common/common-util.js',
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'/common/hyperscript.js',
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'/common/inner/common-mediatag.js',
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'/common/media-tag.js',
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'/common/highlight/highlight.pack.js',
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'/customize/messages.js',
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'/bower_components/diff-dom/diffDOM.js',
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'/bower_components/tweetnacl/nacl-fast.min.js',
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'css!/common/highlight/styles/github.css'
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],function ($, ApiConfig, Marked, Hash, Util, h, MT, MediaTag, Highlight, Messages) {
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var DiffMd = {};
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var DiffDOM = window.diffDOM;
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var renderer = new Marked.Renderer();
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var restrictedRenderer = new Marked.Renderer();
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var Mermaid = {
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init: function () {}
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};
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var mermaidThemeCSS = ".node rect { fill: #DDD; stroke: #AAA; } " +
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"rect.task, rect.task0, rect.task2 { stroke-width: 1 !important; rx: 0 !important; } " +
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"g.grid g.tick line { opacity: 0.25; }" +
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"g.today line { stroke: red; stroke-width: 1; stroke-dasharray: 3; opacity: 0.5; }";
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require(['mermaid', 'css!/code/mermaid-new.css'], function (_Mermaid) {
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Mermaid = _Mermaid;
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Mermaid.initialize({
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gantt: { axisFormat: '%m-%d', },
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"themeCSS": mermaidThemeCSS,
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});
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});
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var highlighter = function () {
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return function(code, lang) {
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if (lang) {
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try {
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return Highlight.highlight(lang, code).value;
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} catch (e) {
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return code;
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}
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}
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return code;
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};
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};
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Marked.setOptions({
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//sanitize: true, // Disable HTML
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renderer: renderer,
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highlight: highlighter(),
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});
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var toc = [];
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var getTOC = function () {
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var content = [h('h2', Messages.markdown_toc)];
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toc.forEach(function (obj) {
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// Only include level 2 headings
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var level = obj.level - 1;
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if (level < 1) { return; }
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var a = h('a.cp-md-toc-link', {
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href: '#',
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'data-href': obj.id,
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});
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a.innerHTML = obj.title;
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content.push(h('p.cp-md-toc-'+level, ['• ', a]));
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});
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return h('div.cp-md-toc', content).outerHTML;
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};
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DiffMd.render = function (md, sanitize, restrictedMd) {
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Marked.setOptions({
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renderer: restrictedMd ? restrictedRenderer : renderer,
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});
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var r = Marked(md, {
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sanitize: sanitize
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});
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// Add Table of Content
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if (!restrictedMd) {
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r = r.replace(/<div class="cp-md-toc"><\/div>/g, getTOC());
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}
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toc = [];
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return r;
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};
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var mediaMap = {};
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var defaultCode = renderer.code;
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renderer.code = function (code, language) {
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if (language === 'mermaid' && code.match(/^(graph|pie|gantt|sequenceDiagram|classDiagram|gitGraph)/)) {
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return '<pre class="mermaid">'+Util.fixHTML(code)+'</pre>';
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} else {
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return defaultCode.apply(renderer, arguments);
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}
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};
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restrictedRenderer.code = renderer.code;
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renderer.heading = function (text, level) {
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var i = 0;
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var safeText = text.toLowerCase().replace(/[^\w]+/g, '-');
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var getId = function () {
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return 'cp-md-' + i + '-' + safeText;
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};
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var id = getId();
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var isAlreadyUsed = function (obj) { return obj.id === id; };
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while (toc.some(isAlreadyUsed)) {
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i++;
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id = getId();
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}
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toc.push({
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level: level,
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id: id,
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title: Util.stripTags(text)
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});
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return "<h" + level + " id=\"" + id + "\"><a href=\"#" + id + "\" class=\"anchor\"></a>" + text + "</h" + level + ">";
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};
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restrictedRenderer.heading = function (text) {
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return text;
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};
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// Tasks list
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var checkedTaskItemPtn = /^\s*(<p>)?\[[xX]\](<\/p>)?\s*/;
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var uncheckedTaskItemPtn = /^\s*(<p>)?\[ ?\](<\/p>)?\s*/;
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var bogusCheckPtn = /<input checked="" disabled="" type="checkbox">/;
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var bogusUncheckPtn = /<input disabled="" type="checkbox">/;
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renderer.listitem = function (text) {
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var isCheckedTaskItem = checkedTaskItemPtn.test(text);
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var isUncheckedTaskItem = uncheckedTaskItemPtn.test(text);
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var hasBogusCheckedInput = bogusCheckPtn.test(text);
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var hasBogusUncheckedInput = bogusUncheckPtn.test(text);
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var isCheckbox = true;
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if (isCheckedTaskItem) {
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text = text.replace(checkedTaskItemPtn,
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'<i class="fa fa-check-square" aria-hidden="true"></i>') + '\n';
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} else if (isUncheckedTaskItem) {
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text = text.replace(uncheckedTaskItemPtn,
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'<i class="fa fa-square-o" aria-hidden="true"></i>') + '\n';
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} else if (hasBogusCheckedInput) {
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text = text.replace(bogusCheckPtn,
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'<i class="fa fa-check-square" aria-hidden="true"></i>') + '\n';
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} else if (hasBogusUncheckedInput) {
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text = text.replace(bogusUncheckPtn,
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'<i class="fa fa-square-o" aria-hidden="true"></i>') + '\n';
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} else {
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isCheckbox = false;
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}
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var cls = (isCheckbox) ? ' class="todo-list-item"' : '';
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return '<li'+ cls + '>' + text + '</li>\n';
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};
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restrictedRenderer.listitem = function (text) {
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if (bogusCheckPtn.test(text)) {
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text = text.replace(bogusCheckPtn, '');
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}
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return '<li>' + text + '</li>\n';
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};
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renderer.image = function (href, title, text) {
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if (href.slice(0,6) === '/file/') {
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// DEPRECATED
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// Mediatag using markdown syntax should not be used anymore so they don't support
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// password-protected files
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console.log('DEPRECATED: mediatag using markdown syntax!');
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var parsed = Hash.parsePadUrl(href);
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var secret = Hash.getSecrets('file', parsed.hash);
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var src = (ApiConfig.fileHost || '') +Hash.getBlobPathFromHex(secret.channel);
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var key = Hash.encodeBase64(secret.keys.cryptKey);
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var mt = '<media-tag src="' + src + '" data-crypto-key="cryptpad:' + key + '"></media-tag>';
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if (mediaMap[src]) {
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mt += mediaMap[src];
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}
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mt += '</media-tag>';
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return mt;
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}
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var out = '<img src="' + href + '" alt="' + text + '"';
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if (title) {
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out += ' title="' + title + '"';
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}
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out += this.options.xhtml ? '/>' : '>';
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return out;
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};
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restrictedRenderer.image = renderer.image;
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var renderParagraph = function (p) {
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return /<media\-tag[\s\S]*>/i.test(p)? p + '\n': '<p>' + p + '</p>\n';
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};
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renderer.paragraph = function (p) {
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if (p === '[TOC]') {
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return '<p><div class="cp-md-toc"></div></p>';
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}
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return renderParagraph(p);
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};
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restrictedRenderer.paragraph = function (p) {
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return renderParagraph(p);
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};
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var MutationObserver = window.MutationObserver;
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var forbiddenTags = [
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'SCRIPT',
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'IFRAME',
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'OBJECT',
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'APPLET',
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'VIDEO', // privacy implications of videos are the same as images
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'AUDIO', // same with audio
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];
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var unsafeTag = function (info) {
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/*if (info.node && $(info.node).parents('media-tag').length) {
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// Do not remove elements inside a media-tag
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return true;
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}*/
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if (['addAttribute', 'modifyAttribute'].indexOf(info.diff.action) !== -1) {
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if (/^on/i.test(info.diff.name)) {
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console.log("Rejecting forbidden element attribute with name", info.diff.name);
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return true;
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}
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}
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if (['addElement', 'replaceElement'].indexOf(info.diff.action) !== -1) {
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var msg = "Rejecting forbidden tag of type (%s)";
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if (info.diff.element && forbiddenTags.indexOf(info.diff.element.nodeName.toUpperCase()) !== -1) {
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console.log(msg, info.diff.element.nodeName);
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return true;
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} else if (info.diff.newValue && forbiddenTags.indexOf(info.diff.newValue.nodeName.toUpperCase()) !== -1) {
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console.log("Replacing restricted element type (%s) with PRE", info.diff.newValue.nodeName);
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info.diff.newValue.nodeName = 'PRE';
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}
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}
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};
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var slice = function (coll) {
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return Array.prototype.slice.call(coll);
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};
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var removeNode = function (node) {
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if (!(node && node.parentElement)) { return; }
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var parent = node.parentElement;
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if (!parent) { return; }
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console.log('removing %s tag', node.nodeName);
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parent.removeChild(node);
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};
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var removeForbiddenTags = function (root) {
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if (!root) { return; }
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if (forbiddenTags.indexOf(root.nodeName.toUpperCase()) !== -1) { removeNode(root); }
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slice(root.children).forEach(removeForbiddenTags);
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};
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/* remove listeners from the DOM */
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var removeListeners = function (root) {
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if (!root) { return; }
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slice(root.attributes).map(function (attr) {
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if (/^on/i.test(attr.name)) {
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console.log('removing attribute', attr.name, root.attributes[attr.name]);
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root.attributes.removeNamedItem(attr.name);
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}
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});
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// all the way down
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slice(root.children).forEach(removeListeners);
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};
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var domFromHTML = function (html) {
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var Dom = new DOMParser().parseFromString(html, "text/html");
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Dom.normalize();
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removeForbiddenTags(Dom.body);
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removeListeners(Dom.body);
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return Dom;
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};
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var DD = new DiffDOM({
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preDiffApply: function (info) {
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if (unsafeTag(info)) { return true; }
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},
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});
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var makeDiff = function (A, B, id) {
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var Err;
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var Els = [A, B].map(function (frag) {
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if (typeof(frag) === 'object') {
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if (!frag || (frag && !frag.body)) {
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Err = "No body";
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return;
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}
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var els = frag.body.querySelectorAll('#'+id);
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if (els.length) {
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return els[0];
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}
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}
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Err = 'No candidate found';
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});
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if (Err) { return Err; }
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var patch = DD.diff(Els[0], Els[1]);
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return patch;
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};
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var removeMermaidClickables = function ($el) {
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// find all links in the tree and do the following for each one
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$el.find('a').each(function (index, a) {
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var parent = a.parentElement;
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if (!parent) { return; }
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// iterate over the links' children and transform them into preceding children
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// to preserve their visible ordering
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slice(a.children).forEach(function (child) {
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parent.insertBefore(child, a);
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});
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// remove the link once it has been emptied
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$(a).remove();
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});
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// finally, find all 'clickable' items and remove the class
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$el.find('.clickable').removeClass('clickable');
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};
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var renderMermaid = function ($el) {
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Mermaid.init(undefined, $el);
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// clickable elements in mermaid don't work well with our sandboxing setup
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// the function below strips clickable elements but still leaves behind some artifacts
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// tippy tooltips might still be useful, so they're not removed. It would be
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// preferable to just support links, but this covers up a rough edge in the meantime
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removeMermaidClickables($el);
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};
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DiffMd.apply = function (newHtml, $content, common) {
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var contextMenu = common.importMediaTagMenu();
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var id = $content.attr('id');
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if (!id) { throw new Error("The element must have a valid id"); }
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var pattern = /(<media-tag src="([^"]*)" data-crypto-key="([^"]*)">)<\/media-tag>/g;
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var unsafe_newHtmlFixed = newHtml.replace(pattern, function (all, tag, src) {
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var mt = tag;
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if (mediaMap[src]) { mt += mediaMap[src]; }
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return mt + '</media-tag>';
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});
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var newDomFixed = domFromHTML(unsafe_newHtmlFixed);
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if (!newDomFixed || !newDomFixed.body) { return; }
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var safe_newHtmlFixed = newDomFixed.body.outerHTML;
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var $div = $('<div>', {id: id}).append(safe_newHtmlFixed);
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var Dom = domFromHTML($('<div>').append($div).html());
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$content[0].normalize();
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var mermaid_source = [];
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var mermaid_cache = {};
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var canonicalizeMermaidSource = function (src) {
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// ignore changes to empty lines, since that won't affect
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// since it will have no effect on the rendered charts
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return src.replace(/\n[ \t]*\n*[ \t]*\n/g, '\n');
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};
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// iterate over the unrendered mermaid inputs, caching their source as you go
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$(newDomFixed).find('pre.mermaid').each(function (index, el) {
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if (el.childNodes.length === 1 && el.childNodes[0].nodeType === 3) {
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var src = canonicalizeMermaidSource(el.childNodes[0].wholeText);
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el.setAttribute('mermaid-source', src);
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mermaid_source[index] = src;
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}
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});
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// remember the previous scroll position
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var $parent = $content.parent();
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var scrollTop = $parent.scrollTop();
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// iterate over rendered mermaid charts
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$content.find('pre.mermaid:not([processed="true"])').each(function (index, el) {
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// retrieve the attached source code which it was drawn
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var src = el.getAttribute('mermaid-source');
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/* The new source might have syntax errors that will prevent rendering.
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It might be preferable to keep the existing state instead of removing it
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if you don't have something better to display. Ideally we should display
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the cause of the syntax error so that the user knows what to correct. */
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//if (!Mermaid.parse(src)) { } // TODO
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// check if that source exists in the set of charts which are about to be rendered
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if (mermaid_source.indexOf(src) === -1) {
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// if it's not, then you can remove it
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if (el.parentNode && el.parentNode.children.length) {
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el.parentNode.removeChild(el);
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}
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} else if (el.childNodes.length === 1 && el.childNodes[0].nodeType !== 3) {
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// otherwise, confirm that the content of the rendered chart is not a text node
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// and keep a copy of it
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mermaid_cache[src] = el.childNodes[0];
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}
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});
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var oldDom = domFromHTML($content[0].outerHTML);
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var onPreview = function ($mt) {
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return function () {
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var isSvg = $mt.is('pre.mermaid');
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var mts = [];
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$content.find('media-tag, pre.mermaid').each(function (i, el) {
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if (el.nodeName.toLowerCase() === "pre") {
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var clone = el.cloneNode();
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return void mts.push({
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svg: clone,
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render: function () {
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var $el = $(clone);
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$el.text(clone.getAttribute('mermaid-source'));
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$el.attr('data-processed', '');
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renderMermaid($el);
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}
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});
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}
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var $el = $(el);
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mts.push({
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src: $el.attr('src'),
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key: $el.attr('data-crypto-key')
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});
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});
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// Find initial position
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var idx = -1;
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mts.some(function (obj, i) {
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if (isSvg && $mt.attr('mermaid-source') === $(obj.svg).attr('mermaid-source')) {
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idx = i;
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return true;
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}
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if (!isSvg && obj.src === $mt.attr('src')) {
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idx = i;
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return true;
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}
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});
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if (idx === -1) {
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if (isSvg) {
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var clone = $mt[0].cloneNode();
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mts.unshift({
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svg: clone,
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render: function () {
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var $el = $(clone);
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$el.text(clone.getAttribute('mermaid-source'));
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$el.attr('data-processed', '');
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renderMermaid($el);
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}
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});
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} else {
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mts.unshift({
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src: $mt.attr('src'),
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key: $mt.attr('data-crypto-key')
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});
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}
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idx = 0;
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}
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setTimeout(function () {
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common.getMediaTagPreview(mts, idx);
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});
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};
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};
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var patch = makeDiff(oldDom, Dom, id);
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if (typeof(patch) === 'string') {
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throw new Error(patch);
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} else {
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DD.apply($content[0], patch);
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var $mts = $content.find('media-tag');
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$mts.each(function (i, el) {
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var $mt = $(el).contextmenu(function (e) {
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e.preventDefault();
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$(contextMenu.menu).data('mediatag', $(el));
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$(contextMenu.menu).find('li').show();
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contextMenu.show(e);
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});
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if ($mt.children().length) {
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$mt.off('click dblclick preview');
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$mt.on('preview', onPreview($mt));
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if ($mt.find('img').length) {
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$mt.on('click dblclick', function () {
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$mt.trigger('preview');
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});
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}
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return;
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}
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MediaTag(el);
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var observer = new MutationObserver(function(mutations) {
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mutations.forEach(function(mutation) {
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if (mutation.type === 'childList') {
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var list_values = slice(mutation.target.children)
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.map(function (el) { return el.outerHTML; })
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.join('');
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mediaMap[mutation.target.getAttribute('src')] = list_values;
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observer.disconnect();
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}
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|
});
|
|
$mt.off('click dblclick preview');
|
|
$mt.on('preview', onPreview($mt));
|
|
if ($mt.find('img').length) {
|
|
$mt.on('click dblclick', function () {
|
|
$mt.trigger('preview');
|
|
});
|
|
}
|
|
});
|
|
observer.observe(el, {
|
|
attributes: false,
|
|
childList: true,
|
|
characterData: false
|
|
});
|
|
});
|
|
// Fix Table of contents links
|
|
$content.find('a.cp-md-toc-link').off('click').click(function (e) {
|
|
e.preventDefault();
|
|
e.stopPropagation();
|
|
var $a = $(this);
|
|
if (!$a.attr('data-href')) { return; }
|
|
var target = document.getElementById($a.attr('data-href'));
|
|
if (target) { target.scrollIntoView(); }
|
|
});
|
|
|
|
// loop over mermaid elements in the rendered content
|
|
$content.find('pre.mermaid').each(function (index, el) {
|
|
var $el = $(el);
|
|
$el.off('contextmenu').on('contextmenu', function (e) {
|
|
e.preventDefault();
|
|
$(contextMenu.menu).data('mediatag', $el);
|
|
$(contextMenu.menu).find('li:not(.cp-svg)').hide();
|
|
contextMenu.show(e);
|
|
});
|
|
$el.off('dblclick click preview');
|
|
$el.on('preview', onPreview($el));
|
|
$el.on('dblclick click', function () {
|
|
$el.trigger('preview');
|
|
});
|
|
|
|
// since you've simply drawn the content that was supplied via markdown
|
|
// you can assume that the index of your rendered charts matches that
|
|
// of those in the markdown source.
|
|
var src = mermaid_source[index];
|
|
el.setAttribute('mermaid-source', src);
|
|
var cached = mermaid_cache[src];
|
|
|
|
// check if you had cached a pre-rendered instance of the supplied source
|
|
if (typeof(cached) !== 'object') {
|
|
try {
|
|
renderMermaid($el);
|
|
} catch (e) { console.error(e); }
|
|
return;
|
|
}
|
|
|
|
// if there's a cached rendering, empty out the contained source code
|
|
// which would otherwise be drawn again.
|
|
// apparently this is the fastest way to empty out an element
|
|
while (el.firstChild) { el.removeChild(el.firstChild); } //el.innerHTML = '';
|
|
// insert the cached graph
|
|
el.appendChild(cached);
|
|
// and set a flag indicating that this graph need not be reprocessed
|
|
el.setAttribute('data-processed', true);
|
|
});
|
|
}
|
|
// recover the previous scroll position to avoid jank
|
|
$parent.scrollTop(scrollTop);
|
|
};
|
|
|
|
return DiffMd;
|
|
});
|
|
|