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Use showdown.js from https://github.com/rogerbraun/showdown, for Gith…

…ub-style codeblock support.
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commit 6099c1a9cbb9b158f56be9f18fe3cde5f5a6f841 1 parent 53c97d8
@rogerbraun rogerbraun authored
Showing with 1,338 additions and 419 deletions.
  1. +1,338 −419 app/assets/javascripts/showdown.js
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1,757 app/assets/javascripts/showdown.js
@@ -1,419 +1,1338 @@
-/*
- A A L Source code at:
- T C A <http://www.attacklab.net/>
- T K B
-*/
-
-var Showdown={};
-Showdown.converter=function(){
-var _1;
-var _2;
-var _3;
-var _4=0;
-this.makeHtml=function(_5){
-_1=new Array();
-_2=new Array();
-_3=new Array();
-_5=_5.replace(/~/g,"~T");
-_5=_5.replace(/\$/g,"~D");
-_5=_5.replace(/\r\n/g,"\n");
-_5=_5.replace(/\r/g,"\n");
-_5="\n\n"+_5+"\n\n";
-_5=_6(_5);
-_5=_5.replace(/^[ \t]+$/mg,"");
-_5=_7(_5);
-_5=_8(_5);
-_5=_9(_5);
-_5=_a(_5);
-_5=_5.replace(/~D/g,"$$");
-_5=_5.replace(/~T/g,"~");
-return _5;
-};
-var _8=function(_b){
-var _b=_b.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|\Z)/gm,function(_c,m1,m2,m3,m4){
-m1=m1.toLowerCase();
-_1[m1]=_11(m2);
-if(m3){
-return m3+m4;
-}else{
-if(m4){
-_2[m1]=m4.replace(/"/g,"&quot;");
-}
-}
-return "";
-});
-return _b;
-};
-var _7=function(_12){
-_12=_12.replace(/\n/g,"\n\n");
-var _13="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del";
-var _14="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math";
-_12=_12.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,_15);
-_12=_12.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,_15);
-_12=_12.replace(/(\n[ ]{0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,_15);
-_12=_12.replace(/(\n\n[ ]{0,3}<!(--[^\r]*?--\s*)+>[ \t]*(?=\n{2,}))/g,_15);
-_12=_12.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,_15);
-_12=_12.replace(/\n\n/g,"\n");
-return _12;
-};
-var _15=function(_16,m1){
-var _18=m1;
-_18=_18.replace(/\n\n/g,"\n");
-_18=_18.replace(/^\n/,"");
-_18=_18.replace(/\n+$/g,"");
-_18="\n\n~K"+(_3.push(_18)-1)+"K\n\n";
-return _18;
-};
-var _9=function(_19){
-_19=_1a(_19);
-var key=_1c("<hr />");
-_19=_19.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm,key);
-_19=_19.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm,key);
-_19=_19.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm,key);
-_19=_1d(_19);
-_19=_1e(_19);
-_19=_1f(_19);
-_19=_7(_19);
-_19=_20(_19);
-return _19;
-};
-var _21=function(_22){
-_22=_23(_22);
-_22=_24(_22);
-_22=_25(_22);
-_22=_26(_22);
-_22=_27(_22);
-_22=_28(_22);
-_22=_11(_22);
-_22=_29(_22);
-_22=_22.replace(/ +\n/g," <br />\n");
-return _22;
-};
-var _24=function(_2a){
-var _2b=/(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/gi;
-_2a=_2a.replace(_2b,function(_2c){
-var tag=_2c.replace(/(.)<\/?code>(?=.)/g,"$1`");
-tag=_2e(tag,"\\`*_");
-return tag;
-});
-return _2a;
-};
-var _27=function(_2f){
-_2f=_2f.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,_30);
-_2f=_2f.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?(.*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,_30);
-_2f=_2f.replace(/(\[([^\[\]]+)\])()()()()()/g,_30);
-return _2f;
-};
-var _30=function(_31,m1,m2,m3,m4,m5,m6,m7){
-if(m7==undefined){
-m7="";
-}
-var _39=m1;
-var _3a=m2;
-var _3b=m3.toLowerCase();
-var url=m4;
-var _3d=m7;
-if(url==""){
-if(_3b==""){
-_3b=_3a.toLowerCase().replace(/ ?\n/g," ");
-}
-url="#"+_3b;
-if(_1[_3b]!=undefined){
-url=_1[_3b];
-if(_2[_3b]!=undefined){
-_3d=_2[_3b];
-}
-}else{
-if(_39.search(/\(\s*\)$/m)>-1){
-url="";
-}else{
-return _39;
-}
-}
-}
-url=_2e(url,"*_");
-var _3e="<a href=\""+url+"\"";
-if(_3d!=""){
-_3d=_3d.replace(/"/g,"&quot;");
-_3d=_2e(_3d,"*_");
-_3e+=" title=\""+_3d+"\"";
-}
-_3e+=">"+_3a+"</a>";
-return _3e;
-};
-var _26=function(_3f){
-_3f=_3f.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,_40);
-_3f=_3f.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,_40);
-return _3f;
-};
-var _40=function(_41,m1,m2,m3,m4,m5,m6,m7){
-var _49=m1;
-var _4a=m2;
-var _4b=m3.toLowerCase();
-var url=m4;
-var _4d=m7;
-if(!_4d){
-_4d="";
-}
-if(url==""){
-if(_4b==""){
-_4b=_4a.toLowerCase().replace(/ ?\n/g," ");
-}
-url="#"+_4b;
-if(_1[_4b]!=undefined){
-url=_1[_4b];
-if(_2[_4b]!=undefined){
-_4d=_2[_4b];
-}
-}else{
-return _49;
-}
-}
-_4a=_4a.replace(/"/g,"&quot;");
-url=_2e(url,"*_");
-var _4e="<img src=\""+url+"\" alt=\""+_4a+"\"";
-_4d=_4d.replace(/"/g,"&quot;");
-_4d=_2e(_4d,"*_");
-_4e+=" title=\""+_4d+"\"";
-_4e+=" />";
-return _4e;
-};
-var _1a=function(_4f){
-_4f=_4f.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,function(_50,m1){
-return _1c("<h1>"+_21(m1)+"</h1>");
-});
-_4f=_4f.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,function(_52,m1){
-return _1c("<h2>"+_21(m1)+"</h2>");
-});
-_4f=_4f.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,function(_54,m1,m2){
-var _57=m1.length;
-return _1c("<h"+_57+">"+_21(m2)+"</h"+_57+">");
-});
-return _4f;
-};
-var _58;
-var _1d=function(_59){
-_59+="~0";
-var _5a=/^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
-if(_4){
-_59=_59.replace(_5a,function(_5b,m1,m2){
-var _5e=m1;
-var _5f=(m2.search(/[*+-]/g)>-1)?"ul":"ol";
-_5e=_5e.replace(/\n{2,}/g,"\n\n\n");
-var _60=_58(_5e);
-_60=_60.replace(/\s+$/,"");
-_60="<"+_5f+">"+_60+"</"+_5f+">\n";
-return _60;
-});
-}else{
-_5a=/(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
-_59=_59.replace(_5a,function(_61,m1,m2,m3){
-var _65=m1;
-var _66=m2;
-var _67=(m3.search(/[*+-]/g)>-1)?"ul":"ol";
-var _66=_66.replace(/\n{2,}/g,"\n\n\n");
-var _68=_58(_66);
-_68=_65+"<"+_67+">\n"+_68+"</"+_67+">\n";
-return _68;
-});
-}
-_59=_59.replace(/~0/,"");
-return _59;
-};
-_58=function(_69){
-_4++;
-_69=_69.replace(/\n{2,}$/,"\n");
-_69+="~0";
-_69=_69.replace(/(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm,function(_6a,m1,m2,m3,m4){
-var _6f=m4;
-var _70=m1;
-var _71=m2;
-if(_70||(_6f.search(/\n{2,}/)>-1)){
-_6f=_9(_72(_6f));
-}else{
-_6f=_1d(_72(_6f));
-_6f=_6f.replace(/\n$/,"");
-_6f=_21(_6f);
-}
-return "<li>"+_6f+"</li>\n";
-});
-_69=_69.replace(/~0/g,"");
-_4--;
-return _69;
-};
-var _1e=function(_73){
-_73+="~0";
-_73=_73.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,function(_74,m1,m2){
-var _77=m1;
-var _78=m2;
-_77=_79(_72(_77));
-_77=_6(_77);
-_77=_77.replace(/^\n+/g,"");
-_77=_77.replace(/\n+$/g,"");
-_77="<pre><code>"+_77+"\n</code></pre>";
-return _1c(_77)+_78;
-});
-_73=_73.replace(/~0/,"");
-return _73;
-};
-var _1c=function(_7a){
-_7a=_7a.replace(/(^\n+|\n+$)/g,"");
-return "\n\n~K"+(_3.push(_7a)-1)+"K\n\n";
-};
-var _23=function(_7b){
-_7b=_7b.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,function(_7c,m1,m2,m3,m4){
-var c=m3;
-c=c.replace(/^([ \t]*)/g,"");
-c=c.replace(/[ \t]*$/g,"");
-c=_79(c);
-return m1+"<code>"+c+"</code>";
-});
-return _7b;
-};
-var _79=function(_82){
-_82=_82.replace(/&/g,"&amp;");
-_82=_82.replace(/</g,"&lt;");
-_82=_82.replace(/>/g,"&gt;");
-_82=_2e(_82,"*_{}[]\\",false);
-return _82;
-};
-var _29=function(_83){
-_83=_83.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g,"<strong>$2</strong>");
-_83=_83.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g,"<em>$2</em>");
-return _83;
-};
-var _1f=function(_84){
-_84=_84.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,function(_85,m1){
-var bq=m1;
-bq=bq.replace(/^[ \t]*>[ \t]?/gm,"~0");
-bq=bq.replace(/~0/g,"");
-bq=bq.replace(/^[ \t]+$/gm,"");
-bq=_9(bq);
-bq=bq.replace(/(^|\n)/g,"$1 ");
-bq=bq.replace(/(\s*<pre>[^\r]+?<\/pre>)/gm,function(_88,m1){
-var pre=m1;
-pre=pre.replace(/^ /mg,"~0");
-pre=pre.replace(/~0/g,"");
-return pre;
-});
-return _1c("<blockquote>\n"+bq+"\n</blockquote>");
-});
-return _84;
-};
-var _20=function(_8b){
-_8b=_8b.replace(/^\n+/g,"");
-_8b=_8b.replace(/\n+$/g,"");
-var _8c=_8b.split(/\n{2,}/g);
-var _8d=new Array();
-var end=_8c.length;
-for(var i=0;i<end;i++){
-var str=_8c[i];
-if(str.search(/~K(\d+)K/g)>=0){
-_8d.push(str);
-}else{
-if(str.search(/\S/)>=0){
-str=_21(str);
-str=str.replace(/^([ \t]*)/g,"<p>");
-str+="</p>";
-_8d.push(str);
-}
-}
-}
-end=_8d.length;
-for(var i=0;i<end;i++){
-while(_8d[i].search(/~K(\d+)K/)>=0){
-var _91=_3[RegExp.$1];
-_91=_91.replace(/\$/g,"$$$$");
-_8d[i]=_8d[i].replace(/~K\d+K/,_91);
-}
-}
-return _8d.join("\n\n");
-};
-var _11=function(_92){
-_92=_92.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g,"&amp;");
-_92=_92.replace(/<(?![a-z\/?\$!])/gi,"&lt;");
-return _92;
-};
-var _25=function(_93){
-_93=_93.replace(/\\(\\)/g,_94);
-_93=_93.replace(/\\([`*_{}\[\]()>#+-.!])/g,_94);
-return _93;
-};
-var _28=function(_95){
-_95=_95.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi,"<a href=\"$1\">$1</a>");
-_95=_95.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,function(_96,m1){
-return _98(_a(m1));
-});
-return _95;
-};
-var _98=function(_99){
-function char2hex(ch){
-var _9b="0123456789ABCDEF";
-var dec=ch.charCodeAt(0);
-return (_9b.charAt(dec>>4)+_9b.charAt(dec&15));
-}
-var _9d=[function(ch){
-return "&#"+ch.charCodeAt(0)+";";
-},function(ch){
-return "&#x"+char2hex(ch)+";";
-},function(ch){
-return ch;
-}];
-_99="mailto:"+_99;
-_99=_99.replace(/./g,function(ch){
-if(ch=="@"){
-ch=_9d[Math.floor(Math.random()*2)](ch);
-}else{
-if(ch!=":"){
-var r=Math.random();
-ch=(r>0.9?_9d[2](ch):r>0.45?_9d[1](ch):_9d[0](ch));
-}
-}
-return ch;
-});
-_99="<a href=\""+_99+"\">"+_99+"</a>";
-_99=_99.replace(/">.+:/g,"\">");
-return _99;
-};
-var _a=function(_a3){
-_a3=_a3.replace(/~E(\d+)E/g,function(_a4,m1){
-var _a6=parseInt(m1);
-return String.fromCharCode(_a6);
-});
-return _a3;
-};
-var _72=function(_a7){
-_a7=_a7.replace(/^(\t|[ ]{1,4})/gm,"~0");
-_a7=_a7.replace(/~0/g,"");
-return _a7;
-};
-var _6=function(_a8){
-_a8=_a8.replace(/\t(?=\t)/g," ");
-_a8=_a8.replace(/\t/g,"~A~B");
-_a8=_a8.replace(/~B(.+?)~A/g,function(_a9,m1,m2){
-var _ac=m1;
-var _ad=4-_ac.length%4;
-for(var i=0;i<_ad;i++){
-_ac+=" ";
-}
-return _ac;
-});
-_a8=_a8.replace(/~A/g," ");
-_a8=_a8.replace(/~B/g,"");
-return _a8;
-};
-var _2e=function(_af,_b0,_b1){
-var _b2="(["+_b0.replace(/([\[\]\\])/g,"\\$1")+"])";
-if(_b1){
-_b2="\\\\"+_b2;
-}
-var _b3=new RegExp(_b2,"g");
-_af=_af.replace(_b3,_94);
-return _af;
-};
-var _94=function(_b4,m1){
-var _b6=m1.charCodeAt(0);
-return "~E"+_b6+"E";
-};
-};
-if(typeof exports!='undefined')exports.Showdown=Showdown;
+//
+// 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 = {};
+
+//
+// converter
+//
+// Wraps all "globals" so that the only thing
+// exposed is makeHtml().
+//
+Showdown.converter = function() {
+
+//
+// Globals:
+//
+
+// Global hashes, used by various utility routines
+var g_urls;
+var g_titles;
+var g_html_blocks;
+
+// Used to track when we're inside an ordered or unordered list
+// (see _ProcessListItems() for details):
+var g_list_level = 0;
+
+
+this.makeHtml = function(text) {
+//
+// Main function. The order in which other subs are called here is
+// essential. Link and image substitutions need to happen before
+// _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
+// and <img> tags get encoded.
+//
+
+ // Clear the global hashes. If we don't clear these, you get conflicts
+ // from other articles when generating a page which contains more than
+ // one article (e.g. an index page that shows the N most recent
+ // articles):
+ g_urls = new Array();
+ g_titles = new Array();
+ g_html_blocks = new Array();
+
+ // attacklab: Replace ~ with ~T
+ // This lets us use tilde as an escape char to avoid md5 hashes
+ // The choice of character is arbitray; anything that isn't
+ // magic in Markdown will work.
+ text = text.replace(/~/g,"~T");
+
+ // attacklab: Replace $ with ~D
+ // RegExp interprets $ as a special character
+ // when it's in a replacement string
+ text = text.replace(/\$/g,"~D");
+
+ // Standardize line endings
+ text = text.replace(/\r\n/g,"\n"); // DOS to Unix
+ text = text.replace(/\r/g,"\n"); // Mac to Unix
+
+ // Make sure text begins and ends with a couple of newlines:
+ text = "\n\n" + text + "\n\n";
+
+ // Convert all tabs to spaces.
+ text = _Detab(text);
+
+ // Strip any lines consisting only of spaces and tabs.
+ // This makes subsequent regexen easier to write, because we can
+ // match consecutive blank lines with /\n+/ instead of something
+ // contorted like /[ \t]*\n+/ .
+ text = text.replace(/^[ \t]+$/mg,"");
+
+ // Turn block-level HTML blocks into hash entries
+ text = _HashHTMLBlocks(text);
+
+ // Strip link definitions, store in hashes.
+ text = _StripLinkDefinitions(text);
+
+ text = _RunBlockGamut(text);
+
+ text = _UnescapeSpecialChars(text);
+
+ // attacklab: Restore dollar signs
+ text = text.replace(/~D/g,"$$");
+
+ // attacklab: Restore tildes
+ text = text.replace(/~T/g,"~");
+
+ return text;
+}
+
+
+var _StripLinkDefinitions = function(text) {
+//
+// Strips link definitions from text, stores the URLs and titles in
+// hash references.
+//
+
+ // Link defs are in the form: ^[id]: url "optional title"
+
+ /*
+ var text = text.replace(/
+ ^[ ]{0,3}\[(.+)\]: // id = $1 attacklab: g_tab_width - 1
+ [ \t]*
+ \n? // maybe *one* newline
+ [ \t]*
+ <?(\S+?)>? // url = $2
+ [ \t]*
+ \n? // maybe one newline
+ [ \t]*
+ (?:
+ (\n*) // any lines skipped = $3 attacklab: lookbehind removed
+ ["(]
+ (.+?) // title = $4
+ [")]
+ [ \t]*
+ )? // title is optional
+ (?:\n+|$)
+ /gm,
+ function(){...});
+ */
+ var text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|\Z)/gm,
+ function (wholeMatch,m1,m2,m3,m4) {
+ m1 = m1.toLowerCase();
+ g_urls[m1] = _EncodeAmpsAndAngles(m2); // Link IDs are case-insensitive
+ if (m3) {
+ // Oops, found blank lines, so it's not a title.
+ // Put back the parenthetical statement we stole.
+ return m3+m4;
+ } else if (m4) {
+ g_titles[m1] = m4.replace(/"/g,"&quot;");
+ }
+
+ // Completely remove the definition from the text
+ return "";
+ }
+ );
+
+ return text;
+}
+
+
+var _HashHTMLBlocks = function(text) {
+ // attacklab: Double up blank lines to reduce lookaround
+ text = text.replace(/\n/g,"\n\n");
+
+ // Hashify HTML blocks:
+ // We only want to do this for block-level HTML tags, such as headers,
+ // lists, and tables. That's because we still want to wrap <p>s around
+ // "paragraphs" that are wrapped in non-block-level tags, such as anchors,
+ // phrase emphasis, and spans. The list of tags we're looking for is
+ // hard-coded:
+ var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
+ var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
+
+ // First, look for nested blocks, e.g.:
+ // <div>
+ // <div>
+ // tags for inner block must be indented.
+ // </div>
+ // </div>
+ //
+ // The outermost tags must start at the left margin for this to match, and
+ // the inner nested divs must be indented.
+ // We need to do this before the next, more liberal match, because the next
+ // match will start at the first `<div>` and stop at the first `</div>`.
+
+ // attacklab: This regex can be expensive when it fails.
+ /*
+ var text = text.replace(/
+ ( // save in $1
+ ^ // start of line (with /m)
+ <($block_tags_a) // start tag = $2
+ \b // word break
+ // attacklab: hack around khtml/pcre bug...
+ [^\r]*?\n // any number of lines, minimally matching
+ </\2> // the matching end tag
+ [ \t]* // trailing spaces/tabs
+ (?=\n+) // followed by a newline
+ ) // attacklab: there are sentinel newlines at end of document
+ /gm,function(){...}};
+ */
+ text = text.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,hashElement);
+
+ //
+ // Now match more liberally, simply from `\n<tag>` to `</tag>\n`
+ //
+
+ /*
+ var text = text.replace(/
+ ( // save in $1
+ ^ // start of line (with /m)
+ <($block_tags_b) // start tag = $2
+ \b // word break
+ // attacklab: hack around khtml/pcre bug...
+ [^\r]*? // any number of lines, minimally matching
+ .*</\2> // the matching end tag
+ [ \t]* // trailing spaces/tabs
+ (?=\n+) // followed by a newline
+ ) // attacklab: there are sentinel newlines at end of document
+ /gm,function(){...}};
+ */
+ text = text.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,hashElement);
+
+ // Special case just for <hr />. It was easier to make a special case than
+ // to make the other regex more complicated.
+
+ /*
+ text = text.replace(/
+ ( // save in $1
+ \n\n // Starting after a blank line
+ [ ]{0,3}
+ (<(hr) // start tag = $2
+ \b // word break
+ ([^<>])*? //
+ \/?>) // the matching end tag
+ [ \t]*
+ (?=\n{2,}) // followed by a blank line
+ )
+ /g,hashElement);
+ */
+ text = text.replace(/(\n[ ]{0,3}(<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,hashElement);
+
+ // Special case for standalone HTML comments:
+
+ /*
+ text = text.replace(/
+ ( // save in $1
+ \n\n // Starting after a blank line
+ [ ]{0,3} // attacklab: g_tab_width - 1
+ <!
+ (--[^\r]*?--\s*)+
+ >
+ [ \t]*
+ (?=\n{2,}) // followed by a blank line
+ )
+ /g,hashElement);
+ */
+ text = text.replace(/(\n\n[ ]{0,3}<!(--[^\r]*?--\s*)+>[ \t]*(?=\n{2,}))/g,hashElement);
+
+ // PHP and ASP-style processor instructions (<?...?> and <%...%>)
+
+ /*
+ text = text.replace(/
+ (?:
+ \n\n // Starting after a blank line
+ )
+ ( // save in $1
+ [ ]{0,3} // attacklab: g_tab_width - 1
+ (?:
+ <([?%]) // $2
+ [^\r]*?
+ \2>
+ )
+ [ \t]*
+ (?=\n{2,}) // followed by a blank line
+ )
+ /g,hashElement);
+ */
+ text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,hashElement);
+
+ // attacklab: Undo double lines (see comment at top of this function)
+ text = text.replace(/\n\n/g,"\n");
+ return text;
+}
+
+var hashElement = function(wholeMatch,m1) {
+ var blockText = m1;
+
+ // Undo double lines
+ blockText = blockText.replace(/\n\n/g,"\n");
+ blockText = blockText.replace(/^\n/,"");
+
+ // strip trailing blank lines
+ blockText = blockText.replace(/\n+$/g,"");
+
+ // Replace the element text with a marker ("~KxK" where x is its key)
+ blockText = "\n\n~K" + (g_html_blocks.push(blockText)-1) + "K\n\n";
+
+ return blockText;
+};
+
+var _RunBlockGamut = function(text) {
+//
+// These are all the transformations that form block-level
+// tags like paragraphs, headers, and list items.
+//
+ text = _DoHeaders(text);
+
+ // Do Horizontal Rules:
+ var key = hashBlock("<hr />");
+ text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm,key);
+ text = text.replace(/^[ ]{0,2}([ ]?\-[ ]?){3,}[ \t]*$/gm,key);
+ text = text.replace(/^[ ]{0,2}([ ]?\_[ ]?){3,}[ \t]*$/gm,key);
+
+ text = _DoLists(text);
+ text = _DoGithubCodeBlocks(text);
+ text = _DoCodeBlocks(text);
+ text = _DoBlockQuotes(text);
+
+ // We already ran _HashHTMLBlocks() before, in Markdown(), but that
+ // was to escape raw HTML in the original Markdown source. This time,
+ // we're escaping the markup we've just created, so that we don't wrap
+ // <p> tags around block-level tags.
+ text = _HashHTMLBlocks(text);
+ text = _FormParagraphs(text);
+
+ return text;
+}
+
+
+var _RunSpanGamut = function(text) {
+//
+// These are all the transformations that occur *within* block-level
+// tags like paragraphs, headers, and list items.
+//
+
+ text = _DoCodeSpans(text);
+ text = _EscapeSpecialCharsWithinTagAttributes(text);
+ text = _EncodeBackslashEscapes(text);
+
+ // Process anchor and image tags. Images must come first,
+ // because ![foo][f] looks like an anchor.
+ text = _DoImages(text);
+ text = _DoAnchors(text);
+
+ // Make links out of things like `<http://example.com/>`
+ // Must come after _DoAnchors(), because you can use < and >
+ // delimiters in inline links like [this](<url>).
+ text = _DoAutoLinks(text);
+ text = _EncodeAmpsAndAngles(text);
+ text = _DoItalicsAndBold(text);
+
+ // Do hard breaks:
+ text = text.replace(/ +\n/g," <br />\n");
+
+ return text;
+}
+
+var _EscapeSpecialCharsWithinTagAttributes = function(text) {
+//
+// Within tags -- meaning between < and > -- encode [\ ` * _] so they
+// don't conflict with their use in Markdown for code, italics and strong.
+//
+
+ // Build a regex to find HTML tags and comments. See Friedl's
+ // "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
+ var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--.*?--\s*)+>)/gi;
+
+ text = text.replace(regex, function(wholeMatch) {
+ var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g,"$1`");
+ tag = escapeCharacters(tag,"\\`*_");
+ return tag;
+ });
+
+ return text;
+}
+
+var _DoAnchors = function(text) {
+//
+// Turn Markdown link shortcuts into XHTML <a> tags.
+//
+ //
+ // First, handle reference-style links: [link text] [id]
+ //
+
+ /*
+ text = text.replace(/
+ ( // wrap whole match in $1
+ \[
+ (
+ (?:
+ \[[^\]]*\] // allow brackets nested one level
+ |
+ [^\[] // or anything else
+ )*
+ )
+ \]
+
+ [ ]? // one optional space
+ (?:\n[ ]*)? // one optional newline followed by spaces
+
+ \[
+ (.*?) // id = $3
+ \]
+ )()()()() // pad remaining backreferences
+ /g,_DoAnchors_callback);
+ */
+ text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,writeAnchorTag);
+
+ //
+ // Next, inline-style links: [link text](url "optional title")
+ //
+
+ /*
+ text = text.replace(/
+ ( // wrap whole match in $1
+ \[
+ (
+ (?:
+ \[[^\]]*\] // allow brackets nested one level
+ |
+ [^\[\]] // or anything else
+ )
+ )
+ \]
+ \( // literal paren
+ [ \t]*
+ () // no id, so leave $3 empty
+ <?(.*?)>? // href = $4
+ [ \t]*
+ ( // $5
+ (['"]) // quote char = $6
+ (.*?) // Title = $7
+ \6 // matching quote
+ [ \t]* // ignore any spaces/tabs between closing quote and )
+ )? // title is optional
+ \)
+ )
+ /g,writeAnchorTag);
+ */
+ text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?(.*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,writeAnchorTag);
+
+ //
+ // Last, handle reference-style shortcuts: [link text]
+ // These must come last in case you've also got [link test][1]
+ // or [link test](/foo)
+ //
+
+ /*
+ text = text.replace(/
+ ( // wrap whole match in $1
+ \[
+ ([^\[\]]+) // link text = $2; can't contain '[' or ']'
+ \]
+ )()()()()() // pad rest of backreferences
+ /g, writeAnchorTag);
+ */
+ text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
+
+ return text;
+}
+
+var writeAnchorTag = function(wholeMatch,m1,m2,m3,m4,m5,m6,m7) {
+ if (m7 == undefined) m7 = "";
+ var whole_match = m1;
+ var link_text = m2;
+ var link_id = m3.toLowerCase();
+ var url = m4;
+ var title = m7;
+
+ if (url == "") {
+ if (link_id == "") {
+ // lower-case and turn embedded newlines into spaces
+ link_id = link_text.toLowerCase().replace(/ ?\n/g," ");
+ }
+ url = "#"+link_id;
+
+ if (g_urls[link_id] != undefined) {
+ url = g_urls[link_id];
+ if (g_titles[link_id] != undefined) {
+ title = g_titles[link_id];
+ }
+ }
+ else {
+ if (whole_match.search(/\(\s*\)$/m)>-1) {
+ // Special case for explicit empty url
+ url = "";
+ } else {
+ return whole_match;
+ }
+ }
+ }
+
+ url = escapeCharacters(url,"*_");
+ var result = "<a href=\"" + url + "\"";
+
+ if (title != "") {
+ title = title.replace(/"/g,"&quot;");
+ title = escapeCharacters(title,"*_");
+ result += " title=\"" + title + "\"";
+ }
+
+ result += ">" + link_text + "</a>";
+
+ return result;
+}
+
+
+var _DoImages = function(text) {
+//
+// Turn Markdown image shortcuts into <img> tags.
+//
+
+ //
+ // First, handle reference-style labeled images: ![alt text][id]
+ //
+
+ /*
+ text = text.replace(/
+ ( // wrap whole match in $1
+ !\[
+ (.*?) // alt text = $2
+ \]
+
+ [ ]? // one optional space
+ (?:\n[ ]*)? // one optional newline followed by spaces
+
+ \[
+ (.*?) // id = $3
+ \]
+ )()()()() // pad rest of backreferences
+ /g,writeImageTag);
+ */
+ text = text.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,writeImageTag);
+
+ //
+ // Next, handle inline images: ![alt text](url "optional title")
+ // Don't forget: encode * and _
+
+ /*
+ text = text.replace(/
+ ( // wrap whole match in $1
+ !\[
+ (.*?) // alt text = $2
+ \]
+ \s? // One optional whitespace character
+ \( // literal paren
+ [ \t]*
+ () // no id, so leave $3 empty
+ <?(\S+?)>? // src url = $4
+ [ \t]*
+ ( // $5
+ (['"]) // quote char = $6
+ (.*?) // title = $7
+ \6 // matching quote
+ [ \t]*
+ )? // title is optional
+ \)
+ )
+ /g,writeImageTag);
+ */
+ text = text.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,writeImageTag);
+
+ return text;
+}
+
+var writeImageTag = function(wholeMatch,m1,m2,m3,m4,m5,m6,m7) {
+ var whole_match = m1;
+ var alt_text = m2;
+ var link_id = m3.toLowerCase();
+ var url = m4;
+ var title = m7;
+
+ if (!title) title = "";
+
+ if (url == "") {
+ if (link_id == "") {
+ // lower-case and turn embedded newlines into spaces
+ link_id = alt_text.toLowerCase().replace(/ ?\n/g," ");
+ }
+ url = "#"+link_id;
+
+ if (g_urls[link_id] != undefined) {
+ url = g_urls[link_id];
+ if (g_titles[link_id] != undefined) {
+ title = g_titles[link_id];
+ }
+ }
+ else {
+ return whole_match;
+ }
+ }
+
+ alt_text = alt_text.replace(/"/g,"&quot;");
+ url = escapeCharacters(url,"*_");
+ var result = "<img src=\"" + url + "\" alt=\"" + alt_text + "\"";
+
+ // attacklab: Markdown.pl adds empty title attributes to images.
+ // Replicate this bug.
+
+ //if (title != "") {
+ title = title.replace(/"/g,"&quot;");
+ title = escapeCharacters(title,"*_");
+ result += " title=\"" + title + "\"";
+ //}
+
+ result += " />";
+
+ return result;
+}
+
+
+var _DoHeaders = function(text) {
+
+ // Setext-style headers:
+ // Header 1
+ // ========
+ //
+ // Header 2
+ // --------
+ //
+ text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,
+ function(wholeMatch,m1){return hashBlock('<h1 id="' + headerId(m1) + '">' + _RunSpanGamut(m1) + "</h1>");});
+
+ text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,
+ function(matchFound,m1){return hashBlock('<h2 id="' + headerId(m1) + '">' + _RunSpanGamut(m1) + "</h2>");});
+
+ // atx-style headers:
+ // # Header 1
+ // ## Header 2
+ // ## Header 2 with closing hashes ##
+ // ...
+ // ###### Header 6
+ //
+
+ /*
+ text = text.replace(/
+ ^(\#{1,6}) // $1 = string of #'s
+ [ \t]*
+ (.+?) // $2 = Header text
+ [ \t]*
+ \#* // optional closing #'s (not counted)
+ \n+
+ /gm, function() {...});
+ */
+
+ text = text.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,
+ function(wholeMatch,m1,m2) {
+ var h_level = m1.length;
+ return hashBlock("<h" + h_level + ' id="' + headerId(m2) + '">' + _RunSpanGamut(m2) + "</h" + h_level + ">");
+ });
+
+ function headerId(m) {
+ return m.replace(/[^\w]/g, '').toLowerCase();
+ }
+ return text;
+}
+
+// This declaration keeps Dojo compressor from outputting garbage:
+var _ProcessListItems;
+
+var _DoLists = function(text) {
+//
+// Form HTML ordered (numbered) and unordered (bulleted) lists.
+//
+
+ // attacklab: add sentinel to hack around khtml/safari bug:
+ // http://bugs.webkit.org/show_bug.cgi?id=11231
+ text += "~0";
+
+ // Re-usable pattern to match any entirel ul or ol list:
+
+ /*
+ var whole_list = /
+ ( // $1 = whole list
+ ( // $2
+ [ ]{0,3} // attacklab: g_tab_width - 1
+ ([*+-]|\d+[.]) // $3 = first list item marker
+ [ \t]+
+ )
+ [^\r]+?
+ ( // $4
+ ~0 // sentinel for workaround; should be $
+ |
+ \n{2,}
+ (?=\S)
+ (?! // Negative lookahead for another list item marker
+ [ \t]*
+ (?:[*+-]|\d+[.])[ \t]+
+ )
+ )
+ )/g
+ */
+ var whole_list = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
+
+ if (g_list_level) {
+ text = text.replace(whole_list,function(wholeMatch,m1,m2) {
+ var list = m1;
+ var list_type = (m2.search(/[*+-]/g)>-1) ? "ul" : "ol";
+
+ // Turn double returns into triple returns, so that we can make a
+ // paragraph for the last item in a list, if necessary:
+ list = list.replace(/\n{2,}/g,"\n\n\n");;
+ var result = _ProcessListItems(list);
+
+ // Trim any trailing whitespace, to put the closing `</$list_type>`
+ // up on the preceding line, to get it past the current stupid
+ // HTML block parser. This is a hack to work around the terrible
+ // hack that is the HTML block parser.
+ result = result.replace(/\s+$/,"");
+ result = "<"+list_type+">" + result + "</"+list_type+">\n";
+ return result;
+ });
+ } else {
+ whole_list = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
+ text = text.replace(whole_list,function(wholeMatch,m1,m2,m3) {
+ var runup = m1;
+ var list = m2;
+
+ var list_type = (m3.search(/[*+-]/g)>-1) ? "ul" : "ol";
+ // Turn double returns into triple returns, so that we can make a
+ // paragraph for the last item in a list, if necessary:
+ var list = list.replace(/\n{2,}/g,"\n\n\n");;
+ var result = _ProcessListItems(list);
+ result = runup + "<"+list_type+">\n" + result + "</"+list_type+">\n";
+ return result;
+ });
+ }
+
+ // attacklab: strip sentinel
+ text = text.replace(/~0/,"");
+
+ return text;
+}
+
+_ProcessListItems = function(list_str) {
+//
+// Process the contents of a single ordered or unordered list, splitting it
+// into individual list items.
+//
+ // The $g_list_level global keeps track of when we're inside a list.
+ // Each time we enter a list, we increment it; when we leave a list,
+ // we decrement. If it's zero, we're not in a list anymore.
+ //
+ // We do this because when we're not inside a list, we want to treat
+ // something like this:
+ //
+ // I recommend upgrading to version
+ // 8. Oops, now this line is treated
+ // as a sub-list.
+ //
+ // As a single paragraph, despite the fact that the second line starts
+ // with a digit-period-space sequence.
+ //
+ // Whereas when we're inside a list (or sub-list), that line will be
+ // treated as the start of a sub-list. What a kludge, huh? This is
+ // an aspect of Markdown's syntax that's hard to parse perfectly
+ // without resorting to mind-reading. Perhaps the solution is to
+ // change the syntax rules such that sub-lists must start with a
+ // starting cardinal number; e.g. "1." or "a.".
+
+ g_list_level++;
+
+ // trim trailing blank lines:
+ list_str = list_str.replace(/\n{2,}$/,"\n");
+
+ // attacklab: add sentinel to emulate \z
+ list_str += "~0";
+
+ /*
+ list_str = list_str.replace(/
+ (\n)? // leading line = $1
+ (^[ \t]*) // leading whitespace = $2
+ ([*+-]|\d+[.]) [ \t]+ // list marker = $3
+ ([^\r]+? // list item text = $4
+ (\n{1,2}))
+ (?= \n* (~0 | \2 ([*+-]|\d+[.]) [ \t]+))
+ /gm, function(){...});
+ */
+ list_str = list_str.replace(/(\n)?(^[ \t]*)([*+-]|\d+[.])[ \t]+([^\r]+?(\n{1,2}))(?=\n*(~0|\2([*+-]|\d+[.])[ \t]+))/gm,
+ function(wholeMatch,m1,m2,m3,m4){
+ var item = m4;
+ var leading_line = m1;
+ var leading_space = m2;
+
+ if (leading_line || (item.search(/\n{2,}/)>-1)) {
+ item = _RunBlockGamut(_Outdent(item));
+ }
+ else {
+ // Recursion for sub-lists:
+ item = _DoLists(_Outdent(item));
+ item = item.replace(/\n$/,""); // chomp(item)
+ item = _RunSpanGamut(item);
+ }
+
+ return "<li>" + item + "</li>\n";
+ }
+ );
+
+ // attacklab: strip sentinel
+ list_str = list_str.replace(/~0/g,"");
+
+ g_list_level--;
+ return list_str;
+}
+
+
+var _DoCodeBlocks = function(text) {
+//
+// Process Markdown `<pre><code>` blocks.
+//
+
+ /*
+ text = text.replace(text,
+ /(?:\n\n|^)
+ ( // $1 = the code block -- one or more lines, starting with a space/tab
+ (?:
+ (?:[ ]{4}|\t) // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
+ .*\n+
+ )+
+ )
+ (\n*[ ]{0,3}[^ \t\n]|(?=~0)) // attacklab: g_tab_width
+ /g,function(){...});
+ */
+
+ // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
+ text += "~0";
+
+ text = text.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,
+ function(wholeMatch,m1,m2) {
+ var codeblock = m1;
+ var nextChar = m2;
+
+ codeblock = _EncodeCode( _Outdent(codeblock));
+ codeblock = _Detab(codeblock);
+ codeblock = codeblock.replace(/^\n+/g,""); // trim leading newlines
+ codeblock = codeblock.replace(/\n+$/g,""); // trim trailing whitespace
+
+ codeblock = "<pre><code>" + codeblock + "\n</code></pre>";
+
+ return hashBlock(codeblock) + nextChar;
+ }
+ );
+
+ // attacklab: strip sentinel
+ text = text.replace(/~0/,"");
+
+ return text;
+}
+
+var _DoGithubCodeBlocks = function(text) {
+//
+// Process Github-style code blocks
+// Example:
+// ```ruby
+// def hello_world(x)
+// puts "Hello, #{x}"
+// end
+// ```
+//
+
+
+ // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
+ text += "~0";
+
+ text = text.replace(/\n```(.*)\n([^`]+)\n```/g,
+ function(wholeMatch,m1,m2) {
+ var language = m1;
+ var codeblock = m2;
+
+ codeblock = _EncodeCode(codeblock);
+ codeblock = _Detab(codeblock);
+ codeblock = codeblock.replace(/^\n+/g,""); // trim leading newlines
+ codeblock = codeblock.replace(/\n+$/g,""); // trim trailing whitespace
+
+ codeblock = "<pre><code class='" + language + "'>" + codeblock + "\n</code></pre>";
+
+ return hashBlock(codeblock);
+ }
+ );
+
+ // attacklab: strip sentinel
+ text = text.replace(/~0/,"");
+
+ return text;
+}
+
+var hashBlock = function(text) {
+ text = text.replace(/(^\n+|\n+$)/g,"");
+ return "\n\n~K" + (g_html_blocks.push(text)-1) + "K\n\n";
+}
+
+var _DoCodeSpans = function(text) {
+//
+// * Backtick quotes are used for <code></code> spans.
+//
+// * You can use multiple backticks as the delimiters if you want to
+// include literal backticks in the code span. So, this input:
+//
+// Just type ``foo `bar` baz`` at the prompt.
+//
+// Will translate to:
+//
+// <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
+//
+// There's no arbitrary limit to the number of backticks you
+// can use as delimters. If you need three consecutive backticks
+// in your code, use four for delimiters, etc.
+//
+// * You can use spaces to get literal backticks at the edges:
+//
+// ... type `` `bar` `` ...
+//
+// Turns to:
+//
+// ... type <code>`bar`</code> ...
+//
+
+ /*
+ text = text.replace(/
+ (^|[^\\]) // Character before opening ` can't be a backslash
+ (`+) // $2 = Opening run of `
+ ( // $3 = The code block
+ [^\r]*?
+ [^`] // attacklab: work around lack of lookbehind
+ )
+ \2 // Matching closer
+ (?!`)
+ /gm, function(){...});
+ */
+
+ text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
+ function(wholeMatch,m1,m2,m3,m4) {
+ var c = m3;
+ c = c.replace(/^([ \t]*)/g,""); // leading whitespace
+ c = c.replace(/[ \t]*$/g,""); // trailing whitespace
+ c = _EncodeCode(c);
+ return m1+"<code>"+c+"</code>";
+ });
+
+ return text;
+}
+
+var _EncodeCode = function(text) {
+//
+// Encode/escape certain characters inside Markdown code runs.
+// The point is that in code, these characters are literals,
+// and lose their special Markdown meanings.
+//
+ // Encode all ampersands; HTML entities are not
+ // entities within a Markdown code span.
+ text = text.replace(/&/g,"&amp;");
+
+ // Do the angle bracket song and dance:
+ text = text.replace(/</g,"&lt;");
+ text = text.replace(/>/g,"&gt;");
+
+ // Now, escape characters that are magic in Markdown:
+ text = escapeCharacters(text,"\*_{}[]\\",false);
+
+// jj the line above breaks this:
+//---
+
+//* Item
+
+// 1. Subitem
+
+// special char: *
+//---
+
+ return text;
+}
+
+
+var _DoItalicsAndBold = function(text) {
+
+ // <strong> must go first:
+ text = text.replace(/(\*\*|__)(?=\S)([^\r]*?\S[*_]*)\1/g,
+ "<strong>$2</strong>");
+
+ text = text.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g,
+ "<em>$2</em>");
+
+ return text;
+}
+
+
+var _DoBlockQuotes = function(text) {
+
+ /*
+ text = text.replace(/
+ ( // Wrap whole match in $1
+ (
+ ^[ \t]*>[ \t]? // '>' at the start of a line
+ .+\n // rest of the first line
+ (.+\n)* // subsequent consecutive lines
+ \n* // blanks
+ )+
+ )
+ /gm, function(){...});
+ */
+
+ text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,
+ function(wholeMatch,m1) {
+ var bq = m1;
+
+ // attacklab: hack around Konqueror 3.5.4 bug:
+ // "----------bug".replace(/^-/g,"") == "bug"
+
+ bq = bq.replace(/^[ \t]*>[ \t]?/gm,"~0"); // trim one level of quoting
+
+ // attacklab: clean up hack
+ bq = bq.replace(/~0/g,"");
+
+ bq = bq.replace(/^[ \t]+$/gm,""); // trim whitespace-only lines
+ bq = _RunBlockGamut(bq); // recurse
+
+ bq = bq.replace(/(^|\n)/g,"$1 ");
+ // These leading spaces screw with <pre> content, so we need to fix that:
+ bq = bq.replace(
+ /(\s*<pre>[^\r]+?<\/pre>)/gm,
+ function(wholeMatch,m1) {
+ var pre = m1;
+ // attacklab: hack around Konqueror 3.5.4 bug:
+ pre = pre.replace(/^ /mg,"~0");
+ pre = pre.replace(/~0/g,"");
+ return pre;
+ });
+
+ return hashBlock("<blockquote>\n" + bq + "\n</blockquote>");
+ });
+ return text;
+}
+
+
+var _FormParagraphs = function(text) {
+//
+// Params:
+// $text - string to process with html <p> tags
+//
+
+ // Strip leading and trailing lines:
+ text = text.replace(/^\n+/g,"");
+ text = text.replace(/\n+$/g,"");
+
+ var grafs = text.split(/\n{2,}/g);
+ var grafsOut = new Array();
+
+ //
+ // Wrap <p> tags.
+ //
+ var end = grafs.length;
+ for (var i=0; i<end; i++) {
+ var str = grafs[i];
+
+ // if this is an HTML marker, copy it
+ if (str.search(/~K(\d+)K/g) >= 0) {
+ grafsOut.push(str);
+ }
+ else if (str.search(/\S/) >= 0) {
+ str = _RunSpanGamut(str);
+ str = str.replace(/^([ \t]*)/g,"<p>");
+ str += "</p>"
+ grafsOut.push(str);
+ }
+
+ }
+
+ //
+ // Unhashify HTML blocks
+ //
+ end = grafsOut.length;
+ for (var i=0; i<end; i++) {
+ // if this is a marker for an html block...
+ while (grafsOut[i].search(/~K(\d+)K/) >= 0) {
+ var blockText = g_html_blocks[RegExp.$1];
+ blockText = blockText.replace(/\$/g,"$$$$"); // Escape any dollar signs
+ grafsOut[i] = grafsOut[i].replace(/~K\d+K/,blockText);
+ }
+ }
+
+ return grafsOut.join("\n\n");
+}
+
+
+var _EncodeAmpsAndAngles = function(text) {
+// Smart processing for ampersands and angle brackets that need to be encoded.
+
+ // Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
+ // http://bumppo.net/projects/amputator/
+ text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g,"&amp;");
+
+ // Encode naked <'s
+ text = text.replace(/<(?![a-z\/?\$!])/gi,"&lt;");
+
+ return text;
+}
+
+
+var _EncodeBackslashEscapes = function(text) {
+//
+// Parameter: String.
+// Returns: The string, with after processing the following backslash
+// escape sequences.
+//
+
+ // attacklab: The polite way to do this is with the new
+ // escapeCharacters() function:
+ //
+ // text = escapeCharacters(text,"\\",true);
+ // text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
+ //
+ // ...but we're sidestepping its use of the (slow) RegExp constructor
+ // as an optimization for Firefox. This function gets called a LOT.
+
+ text = text.replace(/\\(\\)/g,escapeCharacters_callback);
+ text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g,escapeCharacters_callback);
+ return text;
+}
+
+
+var _DoAutoLinks = function(text) {
+
+ text = text.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi,"<a href=\"$1\">$1</a>");
+
+ // Email addresses: <address@domain.foo>
+
+ /*
+ text = text.replace(/
+ <
+ (?:mailto:)?
+ (
+ [-.\w]+
+ \@
+ [-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
+ )
+ >
+ /gi, _DoAutoLinks_callback());
+ */
+ text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
+ function(wholeMatch,m1) {
+ return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
+ }
+ );
+
+ return text;
+}
+
+
+var _EncodeEmailAddress = function(addr) {
+//
+// Input: an email address, e.g. "foo@example.com"
+//
+// Output: the email address as a mailto link, with each character
+// of the address encoded as either a decimal or hex entity, in
+// the hopes of foiling most address harvesting spam bots. E.g.:
+//
+// <a href="&#x6D;&#97;&#105;&#108;&#x74;&#111;:&#102;&#111;&#111;&#64;&#101;
+// x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;">&#102;&#111;&#111;
+// &#64;&#101;x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;</a>
+//
+// Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
+// mailing list: <http://tinyurl.com/yu7ue>
+//
+
+ // attacklab: why can't javascript speak hex?
+ function char2hex(ch) {
+ var hexDigits = '0123456789ABCDEF';
+ var dec = ch.charCodeAt(0);
+ return(hexDigits.charAt(dec>>4) + hexDigits.charAt(dec&15));
+ }
+
+ var encode = [
+ function(ch){return "&#"+ch.charCodeAt(0)+";";},
+ function(ch){return "&#x"+char2hex(ch)+";";},
+ function(ch){return ch;}
+ ];
+
+ addr = "mailto:" + addr;
+
+ addr = addr.replace(/./g, function(ch) {
+ if (ch == "@") {
+ // this *must* be encoded. I insist.
+ ch = encode[Math.floor(Math.random()*2)](ch);
+ } else if (ch !=":") {
+ // leave ':' alone (to spot mailto: later)
+ var r = Math.random();
+ // roughly 10% raw, 45% hex, 45% dec
+ ch = (
+ r > .9 ? encode[2](ch) :
+ r > .45 ? encode[1](ch) :
+ encode[0](ch)
+ );
+ }
+ return ch;
+ });
+
+ addr = "<a href=\"" + addr + "\">" + addr + "</a>";
+ addr = addr.replace(/">.+:/g,"\">"); // strip the mailto: from the visible part
+
+ return addr;
+}
+
+
+var _UnescapeSpecialChars = function(text) {
+//
+// Swap back in all the special characters we've hidden.
+//
+ text = text.replace(/~E(\d+)E/g,
+ function(wholeMatch,m1) {
+ var charCodeToReplace = parseInt(m1);
+ return String.fromCharCode(charCodeToReplace);
+ }
+ );
+ return text;
+}
+
+
+var _Outdent = function(text) {
+//
+// Remove one level of line-leading tabs or spaces
+//
+
+ // attacklab: hack around Konqueror 3.5.4 bug:
+ // "----------bug".replace(/^-/g,"") == "bug"
+
+ text = text.replace(/^(\t|[ ]{1,4})/gm,"~0"); // attacklab: g_tab_width
+
+ // attacklab: clean up hack
+ text = text.replace(/~0/g,"")
+
+ return text;
+}
+
+var _Detab = function(text) {
+// attacklab: Detab's completely rewritten for speed.
+// In perl we could fix it by anchoring the regexp with \G.
+// In javascript we're less fortunate.
+
+ // expand first n-1 tabs
+ text = text.replace(/\t(?=\t)/g," "); // attacklab: g_tab_width
+
+ // replace the nth with two sentinels
+ text = text.replace(/\t/g,"~A~B");
+
+ // use the sentinel to anchor our regex so it doesn't explode
+ text = text.replace(/~B(.+?)~A/g,
+ function(wholeMatch,m1,m2) {
+ var leadingText = m1;
+ var numSpaces = 4 - leadingText.length % 4; // attacklab: g_tab_width
+
+ // there *must* be a better way to do this:
+ for (var i=0; i<numSpaces; i++) leadingText+=" ";
+
+ return leadingText;
+ }
+ );
+
+ // clean up sentinels
+ text = text.replace(/~A/g," "); // attacklab: g_tab_width
+ text = text.replace(/~B/g,"");
+
+ return text;
+}
+
+
+//
+// attacklab: Utility functions
+//
+
+
+var escapeCharacters = function(text, charsToEscape, afterBackslash) {
+ // First we have to escape the escape characters so that
+ // we can build a character class out of them
+ var regexString = "([" + charsToEscape.replace(/([\[\]\\])/g,"\\$1") + "])";
+
+ if (afterBackslash) {
+ regexString = "\\\\" + regexString;
+ }
+
+ var regex = new RegExp(regexString,"g");
+ text = text.replace(regex,escapeCharacters_callback);
+
+ return text;
+}
+
+
+var escapeCharacters_callback = function(wholeMatch,m1) {
+ var charCodeToEscape = m1.charCodeAt(0);
+ return "~E"+charCodeToEscape+"E";
+}
+
+} // end of Showdown.converter
+
+// export
+if (typeof exports != 'undefined') exports.Showdown = Showdown;
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