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// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
require('./highlight.jsx');
const TextFormatting = require('./text_formatting.jsx');
const Utils = require('./utils.jsx');
const highlightJs = require('highlight.js/lib/highlight.js');
const marked = require('marked');
const HighlightedLanguages = require('../utils/constants.jsx').HighlightedLanguages;
function markdownImageLoaded(image) {
image.style.height = 'auto';
}
window.markdownImageLoaded = markdownImageLoaded;
class MattermostInlineLexer extends marked.InlineLexer {
constructor(links, options) {
super(links, options);
this.rules = Object.assign({}, this.rules);
// modified version of the regex that doesn't break up words in snake_case,
// allows for links starting with www, and allows links succounded by parentheses
// the original is /^[\s\S]+?(?=[\\<!\[_*`~]|https?:\/\/| {2,}\n|$)/
this.rules.text = /^[\s\S]+?(?=[^\w\/]_|[\\<!\[*`~]|https?:\/\/|www\.|\(| {2,}\n|$)/;
// modified version of the regex that allows links starting with www and those surrounded
// by parentheses
// the original is /^(https?:\/\/[^\s<]+[^<.,:;"')\]\s])/
this.rules.url = /^(\(?(?:https?:\/\/|www\.)[^\s<.][^\s<]*[^<.,:;"'\]\s])/;
// modified version of the regex that allows <links> starting with www.
// the original is /^<([^ >]+(@|:\/)[^ >]+)>/
this.rules.autolink = /^<((?:[^ >]+(@|:\/)|www\.)[^ >]+)>/;
}
}
class MattermostParser extends marked.Parser {
parse(src) {
this.inline = new MattermostInlineLexer(src.links, this.options, this.renderer);
this.tokens = src.reverse();
var out = '';
while (this.next()) {
out += this.tok();
}
return out;
}
}
class MattermostMarkdownRenderer extends marked.Renderer {
constructor(options, formattingOptions = {}) {
super(options);
this.heading = this.heading.bind(this);
this.paragraph = this.paragraph.bind(this);
this.text = this.text.bind(this);
this.formattingOptions = formattingOptions;
}
code(code, language) {
let usedLanguage = language;
if (String(usedLanguage).toLocaleLowerCase() === 'html') {
usedLanguage = 'xml';
}
if (!usedLanguage || highlightJs.listLanguages().indexOf(usedLanguage) < 0) {
let parsed = super.code(code, usedLanguage);
return '<div class="post-body--code"><code class="hljs">' + TextFormatting.sanitizeHtml($(parsed).text()) + '</code></div>';
}
let parsed = highlightJs.highlight(usedLanguage, code);
return '<div class="post-body--code">' +
'<span class="post-body--code__language">' + HighlightedLanguages[usedLanguage] + '</span>' +
'<code class="hljs">' + parsed.value + '</code>' +
'</div>';
}
br() {
if (this.formattingOptions.singleline) {
return ' ';
}
return super.br();
}
image(href, title, text) {
let out = '<img src="' + href + '" alt="' + text + '"';
if (title) {
out += ' title="' + title + '"';
}
out += ' onload="window.markdownImageLoaded(this)" class="markdown-inline-img"';
out += this.options.xhtml ? '/>' : '>';
return out;
}
heading(text, level, raw) {
const id = `${this.options.headerPrefix}${raw.toLowerCase().replace(/[^\w]+/g, '-')}`;
return `<h${level} id="${id}" class="markdown__heading">${text}</h${level}>`;
}
link(href, title, text) {
let outHref = href;
let outText = text;
let prefix = '';
let suffix = '';
// some links like https://en.wikipedia.org/wiki/Rendering_(computer_graphics) contain brackets
// and we try our best to differentiate those from ones just wrapped in brackets when autolinking
if (outHref.startsWith('(') && outHref.endsWith(')') && text === outHref) {
prefix = '(';
suffix = ')';
outText = text.substring(1, text.length - 1);
outHref = outHref.substring(1, outHref.length - 1);
}
if (!(/[a-z+.-]+:/i).test(outHref)) {
outHref = `http://${outHref}`;
}
let output = '<a class="theme markdown__link" href="' + outHref + '"';
if (title) {
output += ' title="' + title + '"';
}
if (outHref.lastIndexOf(Utils.getTeamURLFromAddressBar(), 0) === 0) {
output += '>';
} else {
output += ' target="_blank">';
}
output += outText + '</a>';
return prefix + output + suffix;
}
paragraph(text) {
if (this.formattingOptions.singleline) {
return `<p class="markdown__paragraph-inline">${text}</p>`;
}
return super.paragraph(text);
}
table(header, body) {
return `<table class="markdown__table"><thead>${header}</thead><tbody>${body}</tbody></table>`;
}
text(txt) {
return TextFormatting.doFormatText(txt, this.formattingOptions);
}
}
export function format(text, options) {
const markdownOptions = {
renderer: new MattermostMarkdownRenderer(null, options),
sanitize: true,
gfm: true,
tables: true
};
const tokens = marked.lexer(text, markdownOptions);
return new MattermostParser(markdownOptions).parse(tokens);
}
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