cf-platform/Public/static/xheditor/xheditor_plugins/showdown.js

//
// showdown.js -- A javascript port of Markdown.
//
// Copyright (c) 2007 John Fraser.
//
// Original Markdown Copyright (c) 2004-2005 John Gruber
//   <http://daringfireball.net/projects/markdown/>
//
// Redistributable under a BSD-style open source license.
// See license.txt for more information.
//
// The full source distribution is at:
//
//				A A L
//				T C A
//				T K B
//
//   <http://www.attacklab.net/>
//
//
// Wherever possible, Showdown is a straight, line-by-line port
// of the Perl version of Markdown.
//
// This is not a normal parser design; it's basically just a
// series of string substitutions.  It's hard to read and
// maintain this way,  but keeping Showdown close to the original
// design makes it easier to port new features.
//
// More importantly, Showdown behaves like markdown.pl in most
// edge cases.  So web applications can do client-side preview
// in Javascript, and then build identical HTML on the server.
//
// This port needs the new RegExp functionality of ECMA 262,
// 3rd Edition (i.e. Javascript 1.5).  Most modern web browsers
// should do fine.  Even with the new regular expression features,
// We do a lot of work to emulate Perl's regex functionality.
// The tricky changes in this file mostly have the "attacklab:"
// label.  Major or self-explanatory changes don't.
//
// Smart diff tools like Araxis Merge will be able to match up
// this file with markdown.pl in a useful way.  A little tweaking
// helps: in a copy of markdown.pl, replace "#" with "//" and
// replace "$text" with "text".  Be sure to ignore whitespace
// and line endings.
//
//
// Showdown usage:
//
//   var text = "Markdown *rocks*.";
//
//   var converter = new Showdown.converter();
//   var html = converter.makeHtml(text);
//
//   alert(html);
//
// Note: move the sample code to the bottom of this
// file before uncommenting it.
//
//
// Showdown namespace
//
var Showdown={extensions:{}},forEach=Showdown.forEach=function(a,b){if(typeof a.forEach=="function")a.forEach(b);else{var c,d=a.length;for(c=0;c<d;c++)b(a[c],c,a)}},stdExtName=function(a){return a.replace(/[_-]||\s/g,"").toLowerCase()};Showdown.converter=function(a){var b,c,d,e=0,f=[],g=[];if(typeof module!="undefind"&&typeof exports!="undefined"&&typeof require!="undefind"){var h=require("fs");if(h){var i=h.readdirSync((__dirname||".")+"/extensions").filter(function(a){return~a.indexOf(".js")}).map(function(a){return a.replace(/\.js$/,"")});Showdown.forEach(i,function(a){var b=stdExtName(a);Showdown.extensions[b]=require("./extensions/"+a)})}}this.makeHtml=function(a){return b={},c={},d=[],a=a.replace(/~/g,"~T"),a=a.replace(/\$/g,"~D"),a=a.replace(/\r\n/g,"\n"),a=a.replace(/\r/g,"\n"),a="\n\n"+a+"\n\n",a=M(a),a=a.replace(/^[ \t]+$/mg,""),Showdown.forEach(f,function(b){a=k(b,a)}),a=z(a),a=m(a),a=l(a),a=o(a),a=K(a),a=a.replace(/~D/g,"$$"),a=a.replace(/~T/g,"~"),Showdown.forEach(g,function(b){a=k(b,a)}),a};if(a&&a.extensions){var j=this;Showdown.forEach(a.extensions,function(a){typeof a=="string"&&(a=Showdown.extensions[stdExtName(a)]);if(typeof a!="function")throw"Extension '"+a+"' could not be loaded.  It was either not found or is not a valid extension.";Showdown.forEach(a(j),function(a){a.type?a.type==="language"||a.type==="lang"?f.push(a):(a.type==="output"||a.type==="html")&&g.push(a):g.push(a)})})}var k=function(a,b){if(a.regex){var c=new RegExp(a.regex,"g");return b.replace(c,a.replace)}if(a.filter)return a.filter(b)},l=function(a){return a+="~0",a=a.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|(?=~0))/gm,function(a,d,e,f,g){return d=d.toLowerCase(),b[d]=G(e),f?f+g:(g&&(c[d]=g.replace(/"/g,"&quot;")),"")}),a=a.replace(/~0/,""),a},m=function(a){a=a.replace(/\n/g,"\n\n");var b="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del|style|section|header|footer|nav|article|aside",c="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|style|section|header|footer|nav|article|aside";return a=a.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm,n),a=a.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|style|section|header|footer|nav|article|aside)\b[^\r]*?<\/\2>[ \t]*(?=\n+)\n)/gm,n),a=a.replace(/(\n[ ]{0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,n),a=a.replace(/(\n\n[ ]{0,3}<!(--[^\r]*?--\s*)+>[ \t]*(?=\n{2,}))/g,n),a=a.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,n),a=a.replace(/\n\n/g,"\n"),a},n=function(a,b){var c=b;return c=c.replace(/\n\n/g,"\n"),c=c.replace(/^\n/,""),c=c.replace(/\n+$/g,""),c="\n\n~K"+(d.push(c)-1)+"K\n\n",c},o=function(a){a=v(a);var b=A("<hr />");return a=a.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm,b),a=a.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm,b),a=a.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm,b),a=x(a),a=y(a),a=E(a),a=m(a),a=F(a),a},p=function(a){return a=B(a),a=q(a),a=H(a),a=t(a),a=r(a),a=I(a),a=G(a),a=D(a),a=a.replace(/  +\n/g," <br />\n"),a},q=function(a){var b=/(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/gi;return a=a.replace(b,function(a){var b=a.replace(/(.)<\/?code>(?=.)/g,"$1`");return b=N(b,"\\`*_"),b}),a},r=function(a){return a=a.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,s),a=a.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?(.*?(?:\(.*?\).*?)?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,s),a=a.replace(/(\[([^\[\]]+)\])()()()()()/g,s),a},s=function(a,d,e,f,g,h,i,j){j==undefined&&(j="");var k=d,l=e,m=f.toLowerCase(),n=g,o=j;if(n==""){m==""&&(m=l.toLowerCase().replace(/ ?\n/g," ")),n="#"+m;if(b[m]!=undefined)n=b[m],c[m]!=undefined&&(o=c[m]);else{if(!(k.search(/\(\s*\)$/m)>-1))return k;n=""}}n=N(n,"*_");var p='<a href="'+n+'"';return o!=""&&(o=o.replace(/"/g,"&quot;"),o=N(o,"*_"),p+=' title="'+o+'"'),p+=">"+l+"</a>",p},t=function(a){return a=a.replace(/(!\