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markedown.js
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/**
* markedown - a markdown parser based on marked, added some source map feature.
* Copyright (c) 2015, Tylingsoft. (MIT Licensed)
* https://github.com/tylingsoft/markedown
*/
;(function() {
/**
* Block-Level Grammar
*/
var block = {
newline: /^\n+/,
code: /^( {4}[^\n]+\n*)+/,
fences: noop,
hr: /^( *[-*_]){3,} *(?:\n+|$)/,
heading: /^ *(#{1,6}) *([^\n]+?) *#* *(?:\n+|$)/,
nptable: noop,
lheading: /^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,
blockquote: /^( *>[^\n]+(\n(?!def)[^\n]+)*\n*)+/,
list: /^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
html: /^ *(?:comment *(?:\n|\s*$)|closed *(?:\n{2,}|\s*$)|closing *(?:\n{2,}|\s*$))/,
def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +["(]([^\n]+)[")])? *(?:\n+|$)/,
table: noop,
paragraph: /^((?:[^\n]+\n?(?!hr|heading|lheading|blockquote|tag|def))+)\n*/,
text: /^[^\n]+/
};
block.bullet = /(?:[*+-]|\d+\.)/;
block.item = /^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/;
block.item = replace(block.item, 'gm')
(/bull/g, block.bullet)
();
block.list = replace(block.list)
(/bull/g, block.bullet)
('hr', '\\n+(?=\\1?(?:[-*_] *){3,}(?:\\n+|$))')
('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', block.heading)
('lheading', block.lheading)
('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|$))*)\n*/
});
/**
* Block Lexer
*/
function Lexer(options) {
this.tokens = [];
this.tokens.links = {};
this.options = options || marked.defaults;
this.rules = block.normal;
if (this.options.gfm) {
if (this.options.tables) {
this.rules = block.tables;
} else {
this.rules = block.gfm;
}
}
}
/**
* Expose Block Rules
*/
Lexer.rules = block;
/**
* Static Lex Method
*/
Lexer.lex = function(src, options) {
var lexer = new Lexer(options);
return lexer.lex(src);
};
/**
* Preprocessing
*/
Lexer.prototype.lex = function(src) {
src = src
.replace(/\r\n|\r/g, '\n')
.replace(/\t/g, ' ')
.replace(/\u00a0/g, ' ')
.replace(/\u2424/g, '\n');
return this.token(src, true);
};
/**
* Lexing
*/
Lexer.prototype.token = function(src, top, bq) {
var totalLines = src.split(/\n/).length;
var src = src.replace(/^ +$/gm, '')
, next
, loose
, cap
, bull
, b
, item
, space
, i
, l;
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)) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
cap = cap[0].replace(/^ {4}/gm, '');
this.tokens.push({
type: 'code',
text: !this.options.pedantic
? cap.replace(/\n+$/, '')
: cap,
line: line
});
continue;
}
// fences (gfm)
if (cap = this.rules.fences.exec(src)) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
this.tokens.push({
type: 'code',
lang: cap[2],
text: cap[3],
line: line
});
continue;
}
// heading
if (cap = this.rules.heading.exec(src)) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
this.tokens.push({
type: 'heading',
depth: cap[1].length,
text: cap[2],
line: line
});
continue;
}
// table no leading pipe (gfm)
if (top && (cap = this.rules.nptable.exec(src))) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
item = {
type: 'table',
header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
cells: cap[3].replace(/\n$/, '').split('\n'),
line: line
};
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;
}
// lheading
if (cap = this.rules.lheading.exec(src)) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
this.tokens.push({
type: 'heading',
depth: cap[2] === '=' ? 1 : 2,
text: cap[1],
line: line
});
continue;
}
// hr
if (cap = this.rules.hr.exec(src)) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
this.tokens.push({
type: 'hr',
line: line
});
continue;
}
// blockquote
if (cap = this.rules.blockquote.exec(src)) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
this.tokens.push({
type: 'blockquote_start',
line: line
});
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)) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
bull = cap[2];
this.tokens.push({
type: 'list_start',
ordered: bull.length > 1,
line: line
});
// Get each top-level item.
cap = cap[0].match(this.rules.item);
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 (this.options.smartLists && i !== l - 1) {
b = block.bullet.exec(cap[i + 1])[0];
if (bull !== b && !(bull.length > 1 && b.length > 1)) {
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*$)/.test(item);
if (i !== l - 1) {
next = item.charAt(item.length - 1) === '\n';
if (!loose) loose = next;
}
this.tokens.push({
type: loose
? 'loose_item_start'
: 'list_item_start'
});
// Recurse.
this.token(item, false, bq);
this.tokens.push({
type: 'list_item_end'
});
}
this.tokens.push({
type: 'list_end'
});
continue;
}
// html
if (cap = this.rules.html.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: this.options.sanitize
? 'paragraph'
: 'html',
pre: cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style',
text: cap[0]
});
continue;
}
// def
if ((!bq && top) && (cap = this.rules.def.exec(src))) {
src = src.substring(cap[0].length);
this.tokens.links[cap[1].toLowerCase()] = {
href: cap[2],
title: cap[3]
};
continue;
}
// table (gfm)
if (top && (cap = this.rules.table.exec(src))) {
var line = totalLines - src.split(/\n/).length + 1;
src = src.substring(cap[0].length);
item = {
type: 'table',
header: cap[1].replace(/^ *| *\| *$/g, '').split(/ *\| */),
align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
cells: cap[3].replace(/(?: *\| *)?\n$/, '').split('\n'),
line: line
};
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))) {
var line = totalLines - src.split(/\n/).length + 1;
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],
line: line
});
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_((?:__|[\s\S])+?)_\b|^\*((?:\*\*|[\s\S])+?)\*(?!\*)/,
code: /^(`+)\s*([\s\S]*?[^`])\s*\1(?!`)/,
br: /^ {2,}\n(?!\s*$)/,
del: noop,
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 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.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.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;
}
// 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);
text = escape(cap[1]);
href = text;
out += this.renderer.link(href, null, text);
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
? 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;
}
// 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[2] || cap[1]));
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;
}
// text
if (cap = this.rules.text.exec(src)) {
src = src.substring(cap[0].length);
out += 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]));
};
/**
* Smartypants Transformations
*/
InlineLexer.prototype.smartypants = function(text) {
if (!this.options.smartypants) return text;
return text
// em-dashes
.replace(/--/g, '\u2014')
// 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) {
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, line) {
if (this.options.highlight) {
var out = this.options.highlight(code, lang);
if (out != null && out !== code) {
escaped = true;
code = out;
}
}
if (!lang) {
return '<pre data-line="' + line + '"><code>'
+ (escaped ? code : escape(code, true))
+ '\n</code></pre>';
}
return '<pre data-line="' + line + '"><code class="'
+ this.options.langPrefix
+ escape(lang, true)
+ '">'
+ (escaped ? code : escape(code, true))
+ '\n</code></pre>\n';
};
Renderer.prototype.blockquote = function(quote, line) {
return '<blockquote data-line="' + line + '">\n' + quote + '</blockquote>\n';
};
Renderer.prototype.html = function(html) {
return html;
};
Renderer.prototype.heading = function(text, level, raw, line) {
return '<h'
+ level
+ ' id="'
+ this.options.headerPrefix
+ raw.toLowerCase().replace(/[^\w]+/g, '-')
+ '" data-line="'
+ line
+ '">'
+ text
+ '</h'
+ level
+ '>\n';
};
Renderer.prototype.hr = function(line) {
return this.options.xhtml ? '<hr data-line="' + line + '"/>\n' : '<hr data-line="' + line + '">\n';
};
Renderer.prototype.list = function(body, ordered, line) {
var type = ordered ? 'ol' : 'ul';
return '<' + type + ' data-line="' + line + '">\n' + body + '</' + type + '>\n';
};
Renderer.prototype.listitem = function(text) {
return '<li>' + text + '</li>\n';
};
Renderer.prototype.paragraph = function(text, line) {
return '<p data-line="' + line + '">' + text + '</p>\n';
};
Renderer.prototype.table = function(header, body, line) {
return '<table data-line="' + line + '">\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.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0) {
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;
};
/**
* 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);
return parser.parse(src);
};
/**
* 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;
};
/**
* 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 'hr': {
return this.renderer.hr(this.token.line);
}
case 'heading': {
return this.renderer.heading(
this.inline.output(this.token.text),
this.token.depth,
this.token.text,
this.token.line);