zulip/static/third/marked/lib/marked.js
akshatdalton 9c6d8d9d81 markdown: Add support to shorten GitHub links.
We add support to shorten links and test their shortening in
well-organized, clean manner that makes it trivial to extend the
GitHub approach for GitLab and perhaps other services.

We only shorten basic types of GitHub links (issue, PR, commit) that
fit a set of simple common patterns; the default behaviour of Autolink
is kept for everything else.

Logic added in frontend and backend Markdown Processor is identical.
This makes easy to extend the logic for other services like GitLab.

Fixes #11895.
2021-03-25 00:39:44 -07:00

1612 lines
37 KiB
JavaScript

/**
* marked - a markdown parser
* Copyright (c) 2011-2014, Christopher Jeffrey. (MIT Licensed)
* https://github.com/chjj/marked
*/
;(function() {
/**
* Block-Level Grammar
*/
var block = {
newline: /^\n+/,
code: /^( {4}[^\n]+\n*)+/,
fences: noop,
hr: /^( *[-*_]){3,} *(?:\n+|$)/,
heading: /^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)/,
nptable: noop,
blockquote: /^(?!( *>\s*($|\n))*($|\n))( *>[^\n]*(\n(?!def)[^\n]+)*)+/,
list: /^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
html: /^ *(?:comment *(?:\n|\s*$)|closed *(?:\n{2,}|\s*$)|closing *(?:\n{2,}|\s*$))/,
def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +["(]([^\n]+)[")])? *(?:\n+|$)/,
table: noop,
paragraph: /^((?:[^\n]+\n?(?!hr|heading|blockquote|tag|def))+)\n*/,
text: /^[^\n]+/
};
block.bullet = /(?:[*+-]|\d{1,9}\.)/;
block.item = /^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;
block.item = replace(block.item, 'gm')
(/bull/g, block.bullet)
();
block.list = replace(block.list)
(/bull/g, block.bullet)
('hr', '\\n+(?=\\1?(?:[-*_] *){3,}(?:\\n+|$))')
('def', '\\n+(?=' + block.def.source + ')')
();
block.blockquote = replace(block.blockquote)
('def', block.def)
();
block._tag = '(?!(?:'
+ 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code'
+ '|var|samp|kbd|sub|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo'
+ '|span|br|wbr|ins|del|img)\\b)\\w+(?!:/|[^\\w\\s@]*@)\\b';
block.html = replace(block.html)
('comment', /<!--[\s\S]*?-->/)
('closed', /<(tag)[\s\S]+?<\/\1>/)
('closing', /<tag(?:"[^"]*"|'[^']*'|[^'">])*?>/)
(/tag/g, block._tag)
();
block.paragraph = replace(block.paragraph)
('hr', block.hr)
('heading', ' {0,3}#{1,6} +')
('blockquote', block.blockquote)
('tag', '<' + block._tag)
('def', block.def)
();
/**
* Normal Block Grammar
*/
block.normal = merge({}, block);
/**
* GFM Block Grammar
*/
block.gfm = merge({}, block.normal, {
fences: /^ *(`{3,}|~{3,})[ \.]*(\S+)? *\n([\s\S]*?)\s*\1 *(?:\n+|$)/,
paragraph: /^/,
});
block.gfm.paragraph = replace(block.paragraph)
('(?!', '(?!'
+ block.gfm.fences.source.replace('\\1', '\\2') + '|'
+ block.list.source.replace('\\1', '\\3') + '|')
();
/**
* GFM + Tables Block Grammar
*/
block.tables = merge({}, block.gfm, {
nptable: /^ *(\S.*\|.*)\n *([-:]+ *\|[-| :]*)\n((?:.*\|.*(?:\n|$))*)\n*/,
table: /^ *\|(.+)\n *\|( *[-:]+[-| :]*)\n((?: *\|.*(?:\n|$))*)\n*/
});
/**
* Block Lexer
*/
function Lexer(options) {
this.tokens = [];
this.tokens.links = {};
this.options = options || marked.defaults;
this.rules = block.normal;
if (this.options.gfm) {
if (this.options.tables) {
this.rules = block.tables;
} else {
this.rules = block.gfm;
}
}
}
/**
* Expose Block Rules
*/
Lexer.rules = block;
/**
* Static Lex Method
*/
Lexer.lex = function(src, options) {
var lexer = new Lexer(options);
return lexer.lex(src);
};
/**
* Preprocessing
*/
Lexer.prototype.lex = function(src) {
src = src
.replace(/\r\n|\r/g, '\n')
.replace(/\t/g, ' ')
.replace(/\u00a0/g, ' ')
.replace(/\u2424/g, '\n');
return this.token(src, true);
};
var htmlStashCounter = 0;
var htmlStashTemplate = "klzzwxhzsd:";
var htmlStashRegex = /\bklzzwxhzsd:[0-9]+\b/;
var htmlStash = [];
function stashHtml(html, safe) {
var key = htmlStashTemplate + htmlStashCounter;
htmlStashCounter++;
htmlStash.push([key, html, safe]);
return key;
}
/**
* Lexing
*/
Lexer.prototype.token = function(src, top, bq) {
var src = src.replace(/^ +$/gm, '')
, next
, loose
, cap
, bull
, b
, item
, listStart
, listItems
, space
, i
, l
, isordered;
while (src) {
// newline
if (cap = this.rules.newline.exec(src)) {
src = src.substring(cap[0].length);
if (cap[0].length > 1) {
this.tokens.push({
type: 'space'
});
}
}
// code
if (cap = this.rules.code.exec(src)) {
src = src.substring(cap[0].length);
cap = cap[0].replace(/^ {4}/gm, '');
this.tokens.push({
type: 'code',
text: !this.options.pedantic
? cap.replace(/\n+$/, '')
: cap
});
continue;
}
// fences (gfm)
if (cap = this.rules.fences.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'code',
lang: cap[2],
text: cap[3] || ''
});
continue;
}
// heading
if (cap = this.rules.heading.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'heading',
depth: cap[1].length,
text: cap[2]
});
continue;
}
// table no leading pipe (gfm)
if (top && (cap = this.rules.nptable.exec(src))) {
src = src.substring(cap[0].length);
item = {
type: 'table',
header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
cells: cap[3].replace(/\n$/, '').split('\n')
};
for (i = 0; i < item.align.length; i++) {
if (/^ *-+: *$/.test(item.align[i])) {
item.align[i] = 'right';
} else if (/^ *:-+: *$/.test(item.align[i])) {
item.align[i] = 'center';
} else if (/^ *:-+ *$/.test(item.align[i])) {
item.align[i] = 'left';
} else {
item.align[i] = null;
}
}
for (i = 0; i < item.cells.length; i++) {
item.cells[i] = item.cells[i].split(/ *\| */);
}
this.tokens.push(item);
continue;
}
// hr
if (cap = this.rules.hr.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'hr'
});
continue;
}
// blockquote
if (cap = this.rules.blockquote.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'blockquote_start'
});
cap = cap[0].replace(/^ *> ?/gm, '');
// Pass `top` to keep the current
// "toplevel" state. This is exactly
// how markdown.pl works.
this.token(cap, top, true);
this.tokens.push({
type: 'blockquote_end'
});
continue;
}
// list
if (cap = this.rules.list.exec(src)) {
src = src.substring(cap[0].length);
bull = cap[2];
isordered = bull.length > 1;
listStart = {
type: 'list_start',
ordered: isordered,
start: isordered ? +bull : '',
loose: false
};
this.tokens.push(listStart);
// Get each top-level item.
cap = cap[0].match(this.rules.item);
listItems = [];
next = false;
l = cap.length;
i = 0;
for (; i < l; i++) {
item = cap[i];
// Remove the list item's bullet
// so it is seen as the next token.
space = item.length;
item = item.replace(/^ *([*+-]|\d+\.) */, '');
// Outdent whatever the
// list item contains. Hacky.
if (~item.indexOf('\n ')) {
space -= item.length;
item = !this.options.pedantic
? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
: item.replace(/^ {1,4}/gm, '');
}
// Determine whether the next list item belongs here.
// Backpedal if it does not belong in this list.
if (i !== l - 1) {
b = block.bullet.exec(cap[i + 1])[0];
if (bull.length > 1 ? b.length === 1
: (b.length > 1 || (this.options.smartLists && b !== bull))) {
src = cap.slice(i + 1).join('\n') + src;
i = l - 1;
}
}
// Determine whether item is loose or not.
// Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
// for discount behavior.
loose = next || /\n\n(?!\s*$)/.test(item);
if (i !== l - 1) {
next = item.charAt(item.length - 1) === '\n';
if (!loose) loose = next;
}
if (loose) {
listStart.loose = true;
}
var t = {
type: 'list_item_start',
loose: loose
};
listItems.push(t);
this.tokens.push(t);
// Recurse.
this.token(item, false);
this.tokens.push({
type: 'list_item_end'
});
}
if (listStart.loose) {
l = listItems.length;
i = 0;
for (; i < l; i++) {
listItems[i].loose = true;
}
}
this.tokens.push({
type: 'list_end'
});
continue;
}
// html
if (cap = this.rules.html.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: this.options.sanitize
? 'paragraph'
: 'html',
pre: !this.options.sanitizer
&& (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
text: cap[0]
});
continue;
}
// def
// We disable definition style links in Zulip.
// table (gfm)
if (top && (cap = this.rules.table.exec(src))) {
src = src.substring(cap[0].length);
item = {
type: 'table',
header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
cells: cap[3].replace(/(?: *\| *)?\n$/, '').split('\n')
};
for (i = 0; i < item.align.length; i++) {
if (/^ *-+: *$/.test(item.align[i])) {
item.align[i] = 'right';
} else if (/^ *:-+: *$/.test(item.align[i])) {
item.align[i] = 'center';
} else if (/^ *:-+ *$/.test(item.align[i])) {
item.align[i] = 'left';
} else {
item.align[i] = null;
}
}
for (i = 0; i < item.cells.length; i++) {
item.cells[i] = item.cells[i]
.replace(/^ *\| *| *\| *$/g, '')
.split(/ *\| */);
}
this.tokens.push(item);
continue;
}
// top-level paragraph
if (top && (cap = this.rules.paragraph.exec(src))) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'paragraph',
text: cap[1].charAt(cap[1].length - 1) === '\n'
? cap[1].slice(0, -1)
: cap[1]
});
continue;
}
// text
if (cap = this.rules.text.exec(src)) {
// Top-level should never reach here.
src = src.substring(cap[0].length);
this.tokens.push({
type: 'text',
text: cap[0]
});
continue;
}
if (src) {
throw new
Error('Infinite loop on byte: ' + src.charCodeAt(0));
}
}
return this.tokens;
};
/**
* Inline-Level Grammar
*/
var inline = {
escape: /^\\([\\`*{}\[\]()#+\-.!_>])/,
autolink: /^<([^ >]+(@|:\/)[^ >]+)>/,
url: noop,
tag: /^<!--[\s\S]*?-->|^<\/?\w+(?:"[^"]*"|'[^']*'|[^'">])*?>/,
link: /^!?\[(inside)\]\(href\)/,
reflink: /^!?\[(inside)\]\s*\[([^\]]*)\]/,
nolink: /^!?\[((?:\[[^\]]*\]|[^\[\]])*)\]/,
strong: /^__([\s\S]+?)__(?!_)|^\*\*([\s\S]+?)\*\*(?!\*)/,
em: /^\b_((?:[^_]|__)+?)_\b|^\*((?:\*\*|[\s\S])+?)\*(?!\*)/,
code: /^(`+)(\s*[\s\S]*?[^`]\s*)\1(?!`)/,
br: /^ {2,}\n(?!\s*$)/,
del: noop,
emoji: noop,
unicodeemoji: noop,
usermention: noop,
groupmention: noop,
stream: noop,
tex: noop,
timestamp: noop,
linkifiers: [],
text: /^[\s\S]+?(?=[\\<!\[_*`$]| {2,}\n|$)/
};
inline._inside = /(?:\[[^\]]*\]|[^\[\]]|\](?=[^\[]*\]))*/;
inline._href = /\s*<?([\s\S]*?)>?(?:\s+['"]([\s\S]*?)['"])?\s*/;
inline.link = replace(inline.link)
('inside', inline._inside)
('href', inline._href)
();
inline.reflink = replace(inline.reflink)
('inside', inline._inside)
();
/**
* Normal Inline Grammar
*/
inline.normal = merge({}, inline);
/**
* Pedantic Inline Grammar
*/
inline.pedantic = merge({}, inline.normal, {
strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/
});
/**
* GFM Inline Grammar
*/
inline.gfm = merge({}, inline.normal, {
escape: replace(inline.escape)('])', '~|])')(),
url: /^(https?:\/\/[^\s<]+[^<.,:;"')\]\s])/,
del: /^~~(?=\S)([\s\S]*?\S)~~/,
text: replace(inline.text)
(']|', '~]|')
('|', '|https?://|')
()
});
/**
* GFM + Line Breaks Inline Grammar
*/
inline.breaks = merge({}, inline.gfm, {
br: replace(inline.br)('{2,}', '*')(),
text: replace(inline.gfm.text)('{2,}', '*')()
});
inline.zulip = merge({}, inline.breaks, {
emoji: /^:([A-Za-z0-9_\-\+]+?):/,
unicodeemoji: RegExp('^(\ud83c[\udd00-\udfff]|\ud83d[\udc00-\ude4f]|' +
'\ud83d[\ude80-\udeff]|\ud83e[\udd00-\uddff]|' +
'[\u2000-\u206F]|[\u2300-\u27BF]|[\u2B00-\u2BFF]|' +
'[\u3000-\u303F]|[\u3200-\u32FF])'),
usermention: /^(@(_?)(?:\*\*([^\*]+)\*\*))/, // Match potentially multi-word string between @** **
groupmention: /^@\*([^\*]+)\*/, // Match multi-word string between @* *
stream_topic: /^#\*\*([^\*>]+)>([^\*]+)\*\*/,
stream: /^#\*\*([^\*]+)\*\*/,
tex: /^(\$\$([^\n_$](\\\$|[^\n$])*)\$\$(?!\$))\B/,
timestamp: /^<time:([^>]+)>/,
linkifiers: [],
text: replace(inline.breaks.text)
('|', '|(\ud83c[\udd00-\udfff]|\ud83d[\udc00-\ude4f]|' +
'\ud83d[\ude80-\udeff]|\ud83e[\udd00-\uddff]|' +
'[\u2000-\u206F]|[\u2300-\u27BF]|[\u2B00-\u2BFF]|' +
'[\u3000-\u303F]|[\u3200-\u32FF])|')
(']|', '#@:]|')
('^[', '^^\\${3,}|^^[')
()
});
function shorten_links(href) {
// This value must match what is used in the backend.
const COMMIT_ID_PREFIX_LENGTH = 12;
const url = new URL(href);
if (url.protocol === 'https:' && ['github.com'].includes(url.hostname)) {
// The following part of the code was necessary because unlike Python, str.split
// method in javascript does not return the remaining part of the string.
var parts = url.pathname.split('/').slice(1);
parts = parts.slice(0, 4)
.concat(parts.slice(4).join('/'))
.concat(Array(5).fill(''))
.slice(0, 5);
const organisation = parts[0]
, repository = parts[1]
, artifact = parts[2]
, value = parts[3]
, remaining_path = parts[4];
if (!organisation || !repository || !artifact || !value) {
return href;
}
const repo_short_text = organisation + '/' + repository;
if (remaining_path || url.hash) {
return href;
}
if (url.hostname === 'github.com') {
return shorten_github_links(href, artifact, repo_short_text,
value, COMMIT_ID_PREFIX_LENGTH);
}
}
return href;
}
/**
* Shorten GitHub Links
*/
function shorten_github_links(href, artifact, repo_short_text,
value, commit_id_prefix_length) {
if (['pull', 'issues'].includes(artifact)) {
return repo_short_text + '#' + value;
}
if (artifact == 'commit') {
return repo_short_text + '@' + value.slice(0, commit_id_prefix_length);
}
return href;
}
/**
* Inline Lexer & Compiler
*/
function InlineLexer(links, options) {
this.options = options || marked.defaults;
this.links = links;
this.rules = inline.normal;
this.renderer = this.options.renderer || new Renderer;
this.renderer.options = this.options;
if (!this.links) {
throw new
Error('Tokens array requires a `links` property.');
}
if (this.options.zulip) {
this.rules = inline.zulip;
} else {
if (this.options.gfm) {
if (this.options.breaks) {
this.rules = inline.breaks;
} else {
this.rules = inline.gfm;
}
} else if (this.options.pedantic) {
this.rules = inline.pedantic;
}
}
}
/**
* Expose Inline Rules
*/
InlineLexer.rules = inline;
/**
* Static Lexing/Compiling Method
*/
InlineLexer.output = function(src, links, options) {
var inline = new InlineLexer(links, options);
return inline.output(src);
};
/**
* Lexing/Compiling
*/
InlineLexer.prototype.inlineReplacement = function(regex, src, replace_func) {
var cap, out = "";
regex.lastIndex = 0;
if (cap = regex.exec(src)) {
// Split before-match into its own segment and handle it separately
var match_idx = regex.lastIndex;
var before = src.substring(0, match_idx - cap[0].length);
before = this.output(before);
out += before;
// Consume all of the matched text
src = src.substring(match_idx);
out += replace_func(regex, cap.slice(1), cap[0]);
}
return [src, out];
};
InlineLexer.prototype.output = function(src) {
var out = ''
, link
, text
, href
, cap;
while (src) {
// escape
if (cap = this.rules.escape.exec(src)) {
src = src.substring(cap[0].length);
out += cap[1];
continue;
}
// linkifier (Zulip)
var self = this;
this.rules.linkifiers.forEach(function (linkifier) {
var ret = self.inlineReplacement(linkifier, src, function(regex, groups, match) {
// Insert the created URL
href = self.linkifier(regex, groups, match);
if (href !== undefined) {
href = escape(href);
return self.renderer.link(href, href, match);
} else {
return match;
}
});
src = ret[0];
out += ret[1];
});
// autolink
if (cap = this.rules.autolink.exec(src)) {
src = src.substring(cap[0].length);
if (cap[2] === '@') {
text = cap[1].charAt(6) === ':'
? this.mangle(cap[1].substring(7))
: this.mangle(cap[1]);
href = this.mangle('mailto:') + text;
} else {
text = escape(cap[1]);
href = text;
}
out += this.renderer.link(href, null, text);
continue;
}
// url (gfm)
if (!this.inLink && (cap = this.rules.url.exec(src))) {
src = src.substring(cap[0].length);
href = escape(cap[1]);
text = shorten_links(href)
out += this.renderer.link(href, null, text);
continue;
}
// timestamp
if (cap = this.rules.timestamp.exec(src)) {
src = src.substring(cap[0].length);
out += this.timestamp(cap[1]);
continue;
}
// tag
if (cap = this.rules.tag.exec(src)) {
if (!this.inLink && /^<a /i.test(cap[0])) {
this.inLink = true;
} else if (this.inLink && /^<\/a>/i.test(cap[0])) {
this.inLink = false;
}
src = src.substring(cap[0].length);
out += this.options.sanitize
? this.options.sanitizer
? this.options.sanitizer(cap[0])
: escape(cap[0])
: cap[0]
continue;
}
// link
if (cap = this.rules.link.exec(src)) {
src = src.substring(cap[0].length);
this.inLink = true;
out += this.outputLink(cap, {
href: cap[2],
title: cap[3]
});
this.inLink = false;
continue;
}
// reflink, nolink
if ((cap = this.rules.reflink.exec(src))
|| (cap = this.rules.nolink.exec(src))) {
src = src.substring(cap[0].length);
link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
link = this.links[link.toLowerCase()];
if (!link || !link.href) {
out += cap[0].charAt(0);
src = cap[0].substring(1) + src;
continue;
}
this.inLink = true;
out += this.outputLink(cap, link);
this.inLink = false;
continue;
}
// usermention (Zulip)
if (cap = this.rules.usermention.exec(src)) {
src = src.substring(cap[0].length);
out += this.usermention(unescape(cap[3] || cap[4]), cap[1], cap[2]);
continue;
}
// groupmention (Zulip)
if (cap = this.rules.groupmention.exec(src)) {
src = src.substring(cap[0].length);
out += this.groupmention(unescape(cap[1]), cap[0]);
continue;
}
// stream_topic (Zulip)
if (cap = this.rules.stream_topic.exec(src)) {
src = src.substring(cap[0].length);
out += this.stream_topic(unescape(cap[1]), unescape(cap[2]), cap[0]);
continue;
}
// stream (Zulip)
if (cap = this.rules.stream.exec(src)) {
src = src.substring(cap[0].length);
out += this.stream(unescape(cap[1]), cap[0]);
continue;
}
// strong
if (cap = this.rules.strong.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.strong(this.output(cap[2] || cap[1]));
continue;
}
// em
if (cap = this.rules.em.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.em(this.output(cap[1] + cap[2]));
continue;
}
// code
if (cap = this.rules.code.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.codespan(escape(cap[2], true));
continue;
}
// br
if (cap = this.rules.br.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.br();
continue;
}
// del (gfm)
if (cap = this.rules.del.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.del(this.output(cap[1]));
continue;
}
// emoji (gfm)
if (cap = this.rules.emoji.exec(src)) {
src = src.substring(cap[0].length);
out += this.emoji(cap[1]);
continue;
}
// Unicode emoji
if (cap = this.rules.unicodeemoji.exec(src)) {
src = src.substring(cap[0].length);
out += this.unicodeEmoji(cap[1]);
continue;
}
// timestamp
if (cap = this.rules.timestamp.exec(src)) {
src = src.substring(cap[0].length);
out += this.timestamp(cap[1]);
continue;
}
// tex
if (cap = this.rules.tex.exec(src)) {
src = src.substring(cap[0].length);
out += this.tex(cap[2], cap[0]);
continue;
}
// WARNING: Do not place any parsing logic below this comment.
// Any parsing logic place after the `text` block below will most
// likely be silently never executed.
// text
if (cap = this.rules.text.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.text(escape(this.smartypants(cap[0])));
continue;
}
if (src) {
throw new
Error('Infinite loop on byte: ' + src.charCodeAt(0));
}
}
return out;
};
/**
* Compile Link
*/
InlineLexer.prototype.outputLink = function(cap, link) {
var href = escape(link.href)
, title = link.title ? escape(link.title) : null;
return cap[0].charAt(0) !== '!'
? this.renderer.link(href, title, this.output(cap[1]))
: this.renderer.image(href, title, escape(cap[1]));
};
InlineLexer.prototype.emoji = function (name) {
name = escape(name)
if (typeof this.options.emojiHandler !== 'function')
return ':' + name + ':';
return this.options.emojiHandler(name);
};
InlineLexer.prototype.unicodeEmoji = function (name) {
name = escape(name)
if (typeof this.options.unicodeEmojiHandler !== 'function')
return name;
return this.options.unicodeEmojiHandler(name);
};
InlineLexer.prototype.tex = function (tex, fullmatch) {
if (typeof this.options.texHandler !== 'function')
return fullmatch;
return this.options.texHandler(tex, fullmatch);
};
InlineLexer.prototype.timestamp = function (time) {
if (typeof this.options.timestampHandler !== 'function')
return '&lt;time:' + time + '&gt;';
return this.options.timestampHandler(time);
};
InlineLexer.prototype.linkifier = function (linkifier, matches, orig) {
if (typeof this.options.linkifierHandler !== 'function')
return;
return this.options.linkifierHandler(linkifier, matches);
};
InlineLexer.prototype.usermention = function (username, orig, silent) {
orig = escape(orig);
if (typeof this.options.userMentionHandler !== 'function')
{
return orig;
}
var handled = this.options.userMentionHandler(username, silent === '_');
if (handled !== undefined) {
return handled;
}
return orig;
};
InlineLexer.prototype.groupmention = function (groupname, orig) {
orig = escape(orig);
if (typeof this.options.groupMentionHandler !== 'function')
{
return orig;
}
var handled = this.options.groupMentionHandler(groupname);
if (handled !== undefined) {
return handled;
}
return orig;
};
InlineLexer.prototype.stream = function (streamName, orig) {
orig = escape(orig);
if (typeof this.options.streamHandler !== 'function')
return orig;
var handled = this.options.streamHandler(streamName);
if (handled !== undefined) {
return handled;
}
return orig;
};
InlineLexer.prototype.stream_topic = function (streamName, topic, orig) {
orig = escape(orig);
if (typeof this.options.streamHandler !== 'function')
return orig;
var handled = this.options.streamTopicHandler(streamName, topic);
if (handled !== undefined) {
return handled;
}
return orig;
};
/**
* Smartypants Transformations
*/
InlineLexer.prototype.smartypants = function(text) {
if (!this.options.smartypants) return text;
return text
// em-dashes
.replace(/---/g, '\u2014')
// en-dashes
.replace(/--/g, '\u2013')
// opening singles
.replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
// closing singles & apostrophes
.replace(/'/g, '\u2019')
// opening doubles
.replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
// closing doubles
.replace(/"/g, '\u201d')
// ellipses
.replace(/\.{3}/g, '\u2026');
};
/**
* Mangle Links
*/
InlineLexer.prototype.mangle = function(text) {
if (!this.options.mangle) return text;
var out = ''
, l = text.length
, i = 0
, ch;
for (; i < l; i++) {
ch = text.charCodeAt(i);
if (Math.random() > 0.5) {
ch = 'x' + ch.toString(16);
}
out += '&#' + ch + ';';
}
return out;
};
/**
* Renderer
*/
function Renderer(options) {
this.options = options || {};
}
Renderer.prototype.code = function(code, lang, escaped) {
if (this.options.highlight) {
var out = this.options.highlight(code, lang);
if (out != null && out !== code) {
escaped = true;
code = out;
}
}
if (!lang) {
return '<pre><code>'
+ (escaped ? code : escape(code, true))
+ '\n</code></pre>';
}
return '<pre><code class="'
+ this.options.langPrefix
+ escape(lang, true)
+ '">'
+ (escaped ? code : escape(code, true))
+ '\n</code></pre>\n';
};
Renderer.prototype.blockquote = function(quote) {
quote = this.options.silencedMentionHandler(quote);
return '<blockquote>\n' + quote + '</blockquote>\n';
};
Renderer.prototype.html = function(html) {
return html;
};
Renderer.prototype.heading = function(text, level, raw, slugger) {
// ignore IDs
return '<h' + level + '>' + text + '</h' + level + '>\n';
};
Renderer.prototype.hr = function() {
return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
};
Renderer.prototype.list = function(body, ordered, start) {
var type = ordered ? 'ol' : 'ul',
startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
};
Renderer.prototype.listitem = function(text) {
return '<li>' + text + '</li>\n';
};
Renderer.prototype.paragraph = function(text) {
return '<p>' + text + '</p>\n';
};
Renderer.prototype.table = function(header, body) {
return '<table>\n'
+ '<thead>\n'
+ header
+ '</thead>\n'
+ '<tbody>\n'
+ body
+ '</tbody>\n'
+ '</table>\n';
};
Renderer.prototype.tablerow = function(content) {
return '<tr>\n' + content + '</tr>\n';
};
Renderer.prototype.tablecell = function(content, flags) {
var type = flags.header ? 'th' : 'td';
var tag = flags.align
? '<' + type + ' style="text-align:' + flags.align + '">'
: '<' + type + '>';
return tag + content + '</' + type + '>\n';
};
// span level renderer
Renderer.prototype.strong = function(text) {
return '<strong>' + text + '</strong>';
};
Renderer.prototype.em = function(text) {
return '<em>' + text + '</em>';
};
Renderer.prototype.codespan = function(text) {
return '<code>' + text + '</code>';
};
Renderer.prototype.br = function() {
return this.options.xhtml ? '<br/>' : '<br>';
};
Renderer.prototype.del = function(text) {
return '<del>' + text + '</del>';
};
Renderer.prototype.link = function(href, title, text) {
if (this.options.sanitize) {
try {
var prot = decodeURIComponent(unescape(href))
.replace(/[^\w:]/g, '')
.toLowerCase();
} catch (e) {
return '';
}
if (prot.startsWith('javascript:') || prot.startsWith('vbscript:')) {
return '';
}
}
var out = '<a href="' + href + '"';
if (title) {
out += ' title="' + title + '"';
}
out += '>' + text + '</a>';
return out;
};
Renderer.prototype.image = function(href, title, text) {
var out = '<img src="' + href + '" alt="' + text + '"';
if (title) {
out += ' title="' + title + '"';
}
out += this.options.xhtml ? '/>' : '>';
return out;
};
Renderer.prototype.text = function(text) {
return text;
};
/**
* Parsing & Compiling
*/
function Parser(options) {
this.tokens = [];
this.token = null;
this.options = options || marked.defaults;
this.options.renderer = this.options.renderer || new Renderer;
this.renderer = this.options.renderer;
this.renderer.options = this.options;
}
/**
* Static Parse Method
*/
Parser.parse = function(src, options, renderer) {
var parser = new Parser(options, renderer);
var out = parser.parse(src);
out = parser.postprocess(out);
return out;
};
/**
* Parse Loop
*/
Parser.prototype.parse = function(src) {
this.inline = new InlineLexer(src.links, this.options, this.renderer);
this.tokens = src.reverse();
var out = '';
while (this.next()) {
out += this.tok();
}
return out;
};
/**
* Post Processing - replace stashed HTML
**/
Parser.prototype.postprocess = function(output) {
for (var i = 0; i < htmlStash.length; i++) {
var stash = htmlStash[i];
var key = stash[0],
html = stash[1],
safe = stash[2];
if (!safe) {
html = escape(html);
}
output = output.replace('<p>' + key + '</p>', html)
}
return output;
};
/**
* Next Token
*/
Parser.prototype.next = function() {
return this.token = this.tokens.pop();
};
/**
* Preview Next Token
*/
Parser.prototype.peek = function() {
return this.tokens[this.tokens.length - 1] || 0;
};
/**
* Parse Text Tokens
*/
Parser.prototype.parseText = function() {
var body = this.token.text;
while (this.peek().type === 'text') {
body += '\n' + this.next().text;
}
return this.inline.output(body);
};
/**
* Parse Current Token
*/
Parser.prototype.tok = function() {
switch (this.token.type) {
case 'space': {
return '';
}
case 'heading': {
return this.renderer.heading(
this.inline.output(this.token.text),
this.token.depth,
unescape(this.token.text),
this.slugger);
}
case 'hr': {
return this.renderer.hr();
}
case 'code': {
return this.renderer.code(this.token.text,
this.token.lang,
this.token.escaped);
}
case 'table': {
var header = ''
, body = ''
, i
, row
, cell
, flags
, j;
// header
cell = '';
for (i = 0; i < this.token.header.length; i++) {
flags = { header: true, align: this.token.align[i] };
cell += this.renderer.tablecell(
this.inline.output(this.token.header[i]),
{ header: true, align: this.token.align[i] }
);
}
header += this.renderer.tablerow(cell);
for (i = 0; i < this.token.cells.length; i++) {
row = this.token.cells[i];
cell = '';
for (j = 0; j < row.length; j++) {
cell += this.renderer.tablecell(
this.inline.output(row[j]),
{ header: false, align: this.token.align[j] }
);
}
body += this.renderer.tablerow(cell);
}
return this.renderer.table(header, body);
}
case 'blockquote_start': {
var body = '';
while (this.next().type !== 'blockquote_end') {
body += this.tok();
}
return this.renderer.blockquote(body);
}
case 'list_start': {
var body = ''
, ordered = this.token.ordered
, start = this.token.start;
while (this.next().type !== 'list_end') {
body += this.tok();
}
return this.renderer.list(body, ordered, start);
}
case 'list_item_start': {
var body = ''
, loose = this.token.loose;
while (this.next().type !== 'list_item_end') {
body += !loose && this.token.type === 'text'
? this.parseText()
: this.tok();
}
return this.renderer.listitem(body);
}
case 'html': {
var html = !this.token.pre && !this.options.pedantic
? this.inline.output(this.token.text)
: this.token.text;
return this.renderer.html(html);
}
case 'paragraph': {
return this.renderer.paragraph(this.inline.output(this.token.text));
}
case 'text': {
return this.renderer.paragraph(this.parseText());
}
}
};
/**
* Helpers
*/
function escape(html, encode) {
return html
.replace(!encode ? /&(?!#?\w+;)/g : /&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&#39;');
}
var unescapeReplacements = {
amp: '&',
lt: '<',
gt: '>',
quot: '"',
colon: ':',
};
function unescape(html) {
// explicitly match decimal, hex, and named HTML entities
return html.replace(/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:[0-9A-Za-z]+));?/g, function(_, n) {
n = n.toLowerCase();
if (n.charAt(0) === '#') {
return n.charAt(1) === 'x'
? String.fromCharCode(parseInt(n.substring(2), 16))
: String.fromCharCode(+n.substring(1));
}
return unescapeReplacements[n] || '';
});
}
function replace(regex, opt) {
regex = regex.source;
opt = opt || '';
return function self(name, val) {
if (!name) return new RegExp(regex, opt);
val = val.source || val;
val = val.replace(/(^|[^\[])\^/g, '$1');
regex = regex.replace(name, val);
return self;
};
}
function noop() {}
noop.exec = noop;
function merge(obj) {
var i = 1
, target
, key;
for (; i < arguments.length; i++) {
target = arguments[i];
for (key in target) {
if (Object.prototype.hasOwnProperty.call(target, key)) {
obj[key] = target[key];
}
}
}
return obj;
}
/**
* Marked
*/
function marked(src, opt, callback) {
if (callback || typeof opt === 'function') {
if (!callback) {
callback = opt;
opt = null;
}
opt = merge({}, marked.defaults, opt || {});
var highlight = opt.highlight
, tokens
, pending
, i = 0;
htmlStashCounter = 0;
htmlStash = [];
for (var k = 0; k < opt.preprocessors.length; k++) {
src = opt.preprocessors[k](src);
}
try {
tokens = Lexer.lex(src, opt)
} catch (e) {
return callback(e);
}
pending = tokens.length;
var done = function(err) {
if (err) {
opt.highlight = highlight;
return callback(err);
}
var out;
try {
out = Parser.parse(tokens, opt);
} catch (e) {
err = e;
}
opt.highlight = highlight;
return err
? callback(err)
: callback(null, out);
};
if (!highlight || highlight.length < 3) {
return done();
}
delete opt.highlight;
if (!pending) return done();
for (; i < tokens.length; i++) {
(function(token) {
if (token.type !== 'code') {
return --pending || done();
}
return highlight(token.text, token.lang, function(err, code) {
if (err) return done(err);
if (code == null || code === token.text) {
return --pending || done();
}
token.text = code;
token.escaped = true;
--pending || done();
});
})(tokens[i]);
}
return;
}
try {
if (opt) opt = merge({}, marked.defaults, opt);
htmlStashCounter = 0;
htmlStash = [];
for (var i = 0; i < marked.defaults.preprocessors.length; i++) {
src = marked.defaults.preprocessors[i](src);
}
return Parser.parse(Lexer.lex(src, opt), opt);
} catch (e) {
e.message += '\nPlease report this to https://github.com/chjj/marked.';
if ((opt || marked.defaults).silent) {
return '<p>An error occurred:</p><pre>'
+ escape(e.message + '', true)
+ '</pre>';
}
throw e;
}
}
/**
* Options
*/
marked.options =
marked.setOptions = function(opt) {
merge(marked.defaults, opt);
return marked;
};
marked.defaults = {
gfm: true,
emoji: false,
unicodeemoji: false,
timestamp: true,
tables: true,
breaks: false,
pedantic: false,
sanitize: false,
sanitizer: null,
mangle: true,
smartLists: false,
silent: false,
highlight: null,
langPrefix: 'lang-',
smartypants: false,
headerPrefix: '',
renderer: new Renderer,
preprocessors: [],
xhtml: false
};
/**
* Expose
*/
marked.Parser = Parser;
marked.parser = Parser.parse;
marked.Renderer = Renderer;
marked.Lexer = Lexer;
marked.lexer = Lexer.lex;
marked.InlineLexer = InlineLexer;
marked.inlineLexer = InlineLexer.output;
marked.parse = marked;
marked.stashHtml = stashHtml;
if (typeof module !== 'undefined' && typeof exports === 'object') {
module.exports = marked;
} else if (typeof define === 'function' && define.amd) {
define(function() { return marked; });
} else {
this.marked = marked;
}
}).call(function() {
return this || (typeof window !== 'undefined' ? window : global);
}());