fa23-si/lib/js/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 "$text" with "text".  Be sure to ignore whitespace
// and line endings.
//
//
// Showdown usage:
//
//   var text = "Markdown *rocks*.";
//
//   var converter = new Showdown.converter();
//   var html = converter.makeHtml(text);
//
//   alert(html);
//
// Note: move the sample code to the bottom of this
// file before uncommenting it.
//
//
// Showdown namespace
//
var Showdown={};Showdown.converter=function(){var a,b,c,d=0;this.makeHtml=function(d){return a=new Array,b=new Array,c=new Array,d=d.replace(/~/g,"~T"),d=d.replace(/\$/g,"~D"),d=d.replace(/\r\n/g,"\n"),d=d.replace(/\r/g,"\n"),d="\n\n"+d+"\n\n",d=F(d),d=d.replace(/^[ \t]+$/mg,""),d=f(d),d=e(d),d=h(d),d=D(d),d=d.replace(/~D/g,"$$"),d=d.replace(/~T/g,"~"),d};var e=function(c){var c=c.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|\Z)/gm,function(c,d,e,f,g){return d=d.toLowerCase(),a[d]=z(e),f?f+g:(g&&(b[d]=g.replace(/"/g,"&quot;")),"")});return c},f=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",c="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math";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,g),a=a.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math)\b[^\r]*?.*<\/\2>[ \t]*(?=\n+)\n)/gm,g),a=a.replace(/(\n[ ]{0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,g),a=a.replace(/(\n\n[ ]{0,3}<!(--[^\r]*?--\s*)+>[ \t]*(?=\n{2,}))/g,g),a=a.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,g),a=a.replace(/\n\n/g,"\n"),a},g=function(a,b){var d=b;return d=d.replace(/\n\n/g,"\n"),d=d.replace(/^\n/,""),d=d.replace(/\n+$/g,""),d="\n\n~K"+(c.push(d)-1)+"K\n\n",d},h=function(a){a=o(a);var b=t("<hr />");return a=a.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm,b),a=a.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm,b),a=a.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm,b),a=q(a),a=s(a),a=r(a),a=x(a),a=f(a),a=y(a),a},i=function(a){return a=u(a),a=j(a),a=A(a),a=m(a),a=k(a),a=B(a),a=z(a),a=w(a),a=a.replace(/  +\n/g," <br />\n"),a},j=function(a){var b=/(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/gi;return a=a.replace(b,function(a){var b=a.replace(/(.)<\/?code>(?=.)/g,"$1`");return b=G(b,"\\`*_"),b}),a},k=function(a){return a=a.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,l),a=a.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?(.*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,l),a=a.replace(/(\[([^\[\]]+)\])()()()()()/g,l),a},l=function(c,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(a[m]!=undefined)n=a[m],b[m]!=undefined&&(o=b[m]);else{if(!(k.search(/\(\s*\)$/m)>-1))return k;n=""}}n=G(n,"*_");var p='<a href="'+n+'"';return o!=""&&(o=o.replace(/"/g,"&quot;"),o=G(o,"*_"),p+=' title="'+o+'"'),p+=">"+l+"</a>",p},m=function(a){return a=a.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,n),a=a.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,n),a},n=function(c,d,e,f,g,h,i,j){var k=d,l=e,m=f.toLowerCase(),n=g,o=j;o||(o="");if(n==""){m==""&&(m=l.toLowerCase().replace(/ ?\n/g," ")),n="#"+m;if(a[m]==undefined)return k;n=a[m],b[m]!=undefined&&(o=b[m])}l=l.replace(/"/g,"&quot;"),n=G(n,"*_");var p='<img src="'+n+'" alt="'+l+'"';return o=o.replace(/"/g,"&quot;"),o=G(o,"*_"),p+=' title="'+o+'"',p+=" />",p},o=function(a){function b(a){return a.replace(/[^\w]/g,"").toLowerCase()}return a=a.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,function(a,c){return t('<h1 id="'+b(c)+'">'+i(c)+"</h1>")}),a=a.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,function(a,c){return t('<h2 id="'+b(c)+'">'+i(c)+"</h2>")}),a=a.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,function(a,c,d){var e=c.length;return t("<h"+e+' id="'+b(d)+'">'+i(d)+"</h"+e+">")}),a},p,q=function(a){a+="~0";var b=/^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;return d?a=a.replace(b,function(a,b,c){var d=b,e=c.search(/[*+-]/g)>-1?"ul":"ol";d=d.replace(/\n{2,}/g,"\n\n\n");var f=p(d);return f=f.replace(/\s+$/,""),f="<"+e+">"+f+"</"+e+">\n",f}):(b=/(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g,a=a.replace(b,function(a,b,c,d){var e=b,f=c,g=d.search(/[*+-]/g)>-1?"ul":"ol",f=f.replace(/\n{2,}/g,"\n\n\n"),h=p(f);return h=e+"<"+g+">\n"+h+"</"+g+">\n",h})),a=a.replace(/~0/,""),a};p=function(a){return d++,a=a.replace(/\n{2,}$/,"\n"),a+="~0",a=a.replace(/(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm,function(a,b,c,d,e){var f=e,g=b,j=c;return g||f.search(/\n{2,}/)>-1?f=h(E(f)):(f=q(E(f)),f=f.replace(/\n$/,""),f=i(f)),"<li>"+f+"</li>\n"}),a=a.replace(/~0/g,""),d--,a};var r=function(a){return a+="~0",a=a.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,function(a,b,c){var d=b,e=c;return d=v(E(d)),d=F(d),d=d.replace(/^\n+/g,""),d=d.replace(/\n+$/g,""),d="<pre><code>"+d+"\n</code></pre>",t(d)+e}),a=a.replace(/~0/,""),a},s=function(a){return a+="~0",a=a.replace(/\n```(.*)\n([^`]+)\n```/g,function(a,b,c){var d=b,e=c;return e=v(e),e=F(e),e=e.replace(/^\n+/g,""),e=e.replace(/\n+$/g,""),e="<pre><code class="+d+">"+e+"\n</code></pre>",t(e)}),a=a.replace(/~0/,""),a},t=function(a){return a=a.replace(/(^\n+|\n+$)/g,""),"\n\n~K"+(c.push(a)-1)+"K\n\n"},u=function(a){return a=a.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,function(a,b,c,d,e){var f=d;return f=f.replace(/^([ \t]*)/g,""),f=f.replace(/[ \t]*$/g,""),f=v(f),b+"<code>"+f+"</code>"}),a},v=function(a){return a=a.replace(/&/g,"&amp;"),a=a.replace(/</g,"&lt;"),a=a.replace(/>/g,"&gt;"),a=G(a,"*_{}[]\\",!1),a},w=function(a){return a=a.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g,"<strong>$2</strong>"),a=a.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g,"<em>$2</em>"),a},x=function(a){return a=a.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,function(a,b){var c=b;return c=c.replace(/^[ \t]*>[ \t]?/gm,"~0"),c=c.replace(/~0/g,""),c=c.replace(/^[ \t]+$/gm,""),c=h(c),c=c.replace(/(^|\n)/g,"$1  "),c=c.replace(/(\s*<pre>[^\r]+?<\/pre>)/gm,function(a,b){var c=b;return c=c.replace(/^  /mg,"~0"),c=c.replace(/~0/g,""),c}),t("<blockquote>\n"+c+"\n</blockquote>")}),a},y=function(a){a=a.replace(/^\n+/g,""),a=a.replace(/\n+$/g,"");var b=a.split(/\n{2,}/g),d=new Array,e=b.length;for(var f=0;f<e;f++){var g=b[f];g.search(/~K(\d+)K/g)>=0?d.push(g):g.search(/\S/)>=0&&(g=i(g),g=g.replace(/^([ \t]*)/g,"<p>"),g+="</p>",d.push(g))}e=d.length;for(var f=0;f<e;f++)while(d[f].search(/~K(\d+)K/)>=0){var h=c[RegExp.$1];h=h.replace(/\$/g,"$$$$"),d[f]=d[f].replace(/~K\d+K/,h)}return d.join("\n\n")},z=function(a){return a=a.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g,"&amp;"),a=a.replace(/<(?![a-z\/?\$!])/gi,"&lt;"),a},A=function(a){return a=a.replace(/\\(\\)/g,H),a=a.replace(/\\([`*_{}\[\]()>#+-.!])/g,H),a},B=function(a){return a=a.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi,'<a href="$1">$1</a>'),a=a.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,function(a,b){return C(D(b))}),a},C=function(a){function b(a){var b="0123456789ABCDEF",c=a.charCodeAt(0);return b.charAt(c>>4)+b.charAt(c&15)}var c=[function(a){return"&#"+a.charCodeAt(0)+";"},function(a){return"&#x"+b(a)+";"},function(a){return a}];return a="mailto:"+a,a=a.replace(/./g,function(a){if(a=="@")a=c[Math.floor(Math.random()*2)](a);else if(a!=":"){var b=Math.random();a=b>.9?c[2](a):b>.45?c[1](a):c[0](a)}return a}),a='<a href="'+a+'">'+a+"</a>",a=a.replace(/">.+:/g,'">'),a},D=function(a){return a=a.replace(/~E(\d+)E/g,function(a,b){var c=parseInt(b);return String.fromCharCode(c)}),a},E=function(a){return a=a.replace(/^(\t|[ ]{1,4})/gm,"~0"),a=a.replace(/~0/g,""),a},F=function(a){return a=a.replace(/\t(?=\t)/g,"    "),a=a.replace(/\t/g,"~A~B"),a=a.replace(/~B(.+?)~A/g,function(a,b,c){var d=b,e=4-d.length%4;for(var f=0;f<e;f++)d+=" ";return d}),a=a.replace(/~A/g,"    "),a=a.replace(/~B/g,""),a},G=function(a,b,c){var d="(["+b.replace(/([\[\]\\])/g,"\\$1")+"])";c&&(d="\\\\"+d);var e=new RegExp(d,"g");return a=a.replace(e,H),a},H=function(a,b){var c=b.charCodeAt(0);return"~E"+c+"E"}},typeof exports!="undefined"&&(exports=Showdown);