forum/skins/default/media/js/wmd/showdown.js

   1 //
   2 // showdown.js -- A javascript port of Markdown.
   3 //
   4 // Copyright (c) 2007 John Fraser.
   5 //
   6 // Original Markdown Copyright (c) 2004-2005 John Gruber
   7 //   <http://daringfireball.net/projects/markdown/>
   8 //
   9 // The full source distribution is at:
  10 //
  11 //                              A A L
  12 //                              T C A
  13 //                              T K B
  14 //
  15 //   <http://www.attacklab.net/>
  16 //
  17
  18 //
  19 // Wherever possible, Showdown is a straight, line-by-line port
  20 // of the Perl version of Markdown.
  21 //
  22 // This is not a normal parser design; it's basically just a
  23 // series of string substitutions.  It's hard to read and
  24 // maintain this way,  but keeping Showdown close to the original
  25 // design makes it easier to port new features.
  26 //
  27 // More importantly, Showdown behaves like markdown.pl in most
  28 // edge cases.  So web applications can do client-side preview
  29 // in Javascript, and then build identical HTML on the server.
  30 //
  31 // This port needs the new RegExp functionality of ECMA 262,
  32 // 3rd Edition (i.e. Javascript 1.5).  Most modern web browsers
  33 // should do fine.  Even with the new regular expression features,
  34 // We do a lot of work to emulate Perl's regex functionality.
  35 // The tricky changes in this file mostly have the "attacklab:"
  36 // label.  Major or self-explanatory changes don't.
  37 //
  38 // Smart diff tools like Araxis Merge will be able to match up
  39 // this file with markdown.pl in a useful way.  A little tweaking
  40 // helps: in a copy of markdown.pl, replace "#" with "//" and
  41 // replace "$text" with "text".  Be sure to ignore whitespace
  42 // and line endings.
  43 //
  44
  45
  46 //
  47 // Showdown usage:
  48 //
  49 //   var text = "Markdown *rocks*.";
  50 //
  51 //   var converter = new Attacklab.showdown.converter();
  52 //   var html = converter.makeHtml(text);
  53 //
  54 //   alert(html);
  55 //
  56 // Note: move the sample code to the bottom of this
  57 // file before uncommenting it.
  58 //
  59
  60
  61 //
  62 // Attacklab namespace
  63 //
  64 var Attacklab = Attacklab || {}
  65
  66 //
  67 // Showdown namespace
  68 //
  69 Attacklab.showdown = Attacklab.showdown || {}
  70
  71 //
  72 // converter
  73 //
  74 // Wraps all "globals" so that the only thing
  75 // exposed is makeHtml().
  76 //
  77 Attacklab.showdown.converter = function() {
  78
  79
  80 // g_urls and g_titles allow arbitrary user-entered strings as keys. This
  81 // caused an exception (and hence stopped the rendering) when the user entered
  82 // e.g. [push] or [__proto__]. Adding a prefix to the actual key prevents this
  83 // (since no builtin property starts with "s_"). See
  84 // http://meta.stackoverflow.com/questions/64655/strange-wmd-bug
  85 // (granted, switching from Array() to Object() alone would have left only __proto__
  86 // to be a problem)
  87 var SaveHash = function () {
  88     this.set = function (key, value) {
  89         this["s_" + key] = value;
  90     }
  91     this.get = function (key) {
  92         return this["s_" + key];
  93     }
  94 }
  95
  96 //
  97 // Globals:
  98 //
  99
 100 // Global hashes, used by various utility routines
 101 var g_urls;
 102 var g_titles;
 103 var g_html_blocks;
 104
 105 // Used to track when we're inside an ordered or unordered list
 106 // (see _ProcessListItems() for details):
 107 var g_list_level = 0;
 108
 109
 110 this.makeHtml = function(text) {
 111 //
 112 // Main function. The order in which other subs are called here is
 113 // essential. Link and image substitutions need to happen before
 114 // _EscapeSpecialCharsWithinTagAttributes(), so that any *'s or _'s in the <a>
 115 // and <img> tags get encoded.
 116 //
 117     text = html_sanitize(text, function(url) {return url;}, function(id) {return id;});
 118
 119         // Clear the global hashes. If we don't clear these, you get conflicts
 120         // from other articles when generating a page which contains more than
 121         // one article (e.g. an index page that shows the N most recent
 122         // articles):
 123     g_urls = new SaveHash();
 124     g_titles = new SaveHash();
 125         g_html_blocks = new Array();
 126
 127         // attacklab: Replace ~ with ~T
 128         // This lets us use tilde as an escape char to avoid md5 hashes
 129         // The choice of character is arbitray; anything that isn't
 130     // magic in Markdown will work.
 131         text = text.replace(/~/g,"~T");
 132
 133         // attacklab: Replace $ with ~D
 134         // RegExp interprets $ as a special character
 135         // when it's in a replacement string
 136         text = text.replace(/\$/g,"~D");
 137
 138         // Standardize line endings
 139         text = text.replace(/\r\n/g,"\n"); // DOS to Unix
 140         text = text.replace(/\r/g,"\n"); // Mac to Unix
 141
 142         // Make sure text begins and ends with a couple of newlines:
 143         text = "\n\n" + text + "\n\n";
 144
 145         // Convert all tabs to spaces.
 146         text = _Detab(text);
 147
 148         // Strip any lines consisting only of spaces and tabs.
 149         // This makes subsequent regexen easier to write, because we can
 150         // match consecutive blank lines with /\n+/ instead of something
 151         // contorted like /[ \t]*\n+/ .
 152         text = text.replace(/^[ \t]+$/mg,"");
 153
 154         // Turn block-level HTML blocks into hash entries
 155         text = _HashHTMLBlocks(text);
 156
 157         // Strip link definitions, store in hashes.
 158         text = _StripLinkDefinitions(text);
 159
 160         text = _RunBlockGamut(text);
 161
 162         text = _UnescapeSpecialChars(text);
 163
 164         // attacklab: Restore dollar signs
 165         text = text.replace(/~D/g,"$$");
 166
 167         // attacklab: Restore tildes
 168         text = text.replace(/~T/g,"~");
 169
 170         text = text.replace(/&amp;lt;/g,"<");
 171         text = text.replace(/&amp;gt;/g,">");
 172
 173         return text;
 174 }
 175
 176 var _StripLinkDefinitions = function(text) {
 177 //
 178 // Strips link definitions from text, stores the URLs and titles in
 179 // hash references.
 180 //
 181
 182         // Link defs are in the form: ^[id]: url "optional title"
 183
 184         /*
 185                 var text = text.replace(/
 186                                 ^[ ]{0,3}\[(.+)\]:  // id = $1  attacklab: g_tab_width - 1
 187                                   [ \t]*
 188                                   \n?                           // maybe *one* newline
 189                                   [ \t]*
 190                                 <?(\S+?)>?                      // url = $2
 191                 (?=\s|$)            // lookahead for whitespace instead of the lookbehind removed below
 192                                   [ \t]*
 193                                   \n?                           // maybe one newline
 194                                   [ \t]*
 195                                 (                   // (potential) title = $3
 196                                   (\n*)                         // any lines skipped = $4 attacklab: lookbehind removed
 197                   [ \t]+
 198                                   ["(]
 199                                   (.+?)                         // title = $5
 200                                   [")]
 201                                   [ \t]*
 202                                 )?                                      // title is optional
 203                                 (?:\n+|$)
 204                           /gm,
 205                           function(){...});
 206         */
 207         var text = text.replace(/^[ ]{0,3}\[(.+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?(?=\s|$)[ \t]*\n?[ \t]*((\n*)["(](.+?)[")][ \t]*)?(?:\n+)/gm,
 208                 function (wholeMatch,m1,m2,m3,m4,m5) {
 209                         m1 = m1.toLowerCase();
 210                         g_urls.set(m1, _EncodeAmpsAndAngles(m2));  // Link IDs are case-insensitive
 211                         if (m4) {
 212                                 // Oops, found blank lines, so it's not a title.
 213                                 // Put back the parenthetical statement we stole.
 214                                 return m3;
 215                         } else if (m5) {
 216                                 g_titles.set(m1, m5.replace(/"/g,"&quot;"));
 217                         }
 218
 219                         // Completely remove the definition from the text
 220                         return "";
 221                 }
 222         );
 223
 224         return text;
 225 }
 226
 227 var _HashHTMLBlocks = function(text) {
 228
 229         // Hashify HTML blocks:
 230         // We only want to do this for block-level HTML tags, such as headers,
 231         // lists, and tables. That's because we still want to wrap <p>s around
 232         // "paragraphs" that are wrapped in non-block-level tags, such as anchors,
 233         // phrase emphasis, and spans. The list of tags we're looking for is
 234         // hard-coded:
 235         var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
 236         var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"
 237
 238         // First, look for nested blocks, e.g.:
 239         //   <div>
 240         //     <div>
 241         //     tags for inner block must be indented.
 242         //     </div>
 243         //   </div>
 244         //
 245         // The outermost tags must start at the left margin for this to match, and
 246         // the inner nested divs must be indented.
 247         // We need to do this before the next, more liberal match, because the next
 248         // match will start at the first `<div>` and stop at the first `</div>`.
 249
 250         // attacklab: This regex can be expensive when it fails.
 251         /*
 252                 var text = text.replace(/
 253                 (                                               // save in $1
 254                         ^                                       // start of line  (with /m)
 255                         <($block_tags_a)        // start tag = $2
 256                         \b                                      // word break
 257                                                                 // attacklab: hack around khtml/pcre bug...
 258                         [^\r]*?\n                       // any number of lines, minimally matching
 259                         </\2>                           // the matching end tag
 260                         [ \t]*                          // trailing spaces/tabs
 261                         (?=\n+)                         // followed by a newline
 262                 )                                               // attacklab: there are sentinel newlines at end of document
 263                 /gm,function(){...}};
 264         */
 265         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);
 266
 267         //
 268         // Now match more liberally, simply from `\n<tag>` to `</tag>\n`
 269         //
 270
 271         /*
 272                 var text = text.replace(/
 273                 (                                               // save in $1
 274                         ^                                       // start of line  (with /m)
 275                         <($block_tags_b)        // start tag = $2
 276                         \b                                      // word break
 277                                                                 // attacklab: hack around khtml/pcre bug...
 278                         [^\r]*?                         // any number of lines, minimally matching
 279                         .*</\2>                         // the matching end tag
 280                         [ \t]*                          // trailing spaces/tabs
 281                         (?=\n+)                         // followed by a newline
 282                 )                                               // attacklab: there are sentinel newlines at end of document
 283                 /gm,function(){...}};
 284         */
 285         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);
 286
 287         // Special case just for <hr />. It was easier to make a special case than
 288         // to make the other regex more complicated.
 289
 290         /*
 291                 text = text.replace(/
 292                 \n                                  // Starting after a blank line
 293                 [ ]{0,3}
 294                 (                                               // save in $1
 295                         (<(hr)                          // start tag = $2
 296                         \b                                      // word break
 297                         ([^<>])*?                       //
 298                         \/?>)                           // the matching end tag
 299                         [ \t]*
 300                         (?=\n{2,})                      // followed by a blank line
 301                 )
 302                 /g,hashElement);
 303         */
 304         text = text.replace(/\n[ ]{0,3}((<(hr)\b([^<>])*?\/?>)[ \t]*(?=\n{2,}))/g,hashElement);
 305
 306         // Special case for standalone HTML comments:
 307
 308         /*
 309                 text = text.replace(/
 310                 \n\n                            // Starting after a blank line
 311                 [ ]{0,3}                        // attacklab: g_tab_width - 1
 312                 (                                               // save in $1
 313                         <!
 314                         (--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)    // see http://www.w3.org/TR/html-markup/syntax.html#comments
 315                         >
 316                         [ \t]*
 317                         (?=\n{2,})                      // followed by a blank line
 318                 )
 319                 /g,hashElement);
 320         */
 321         text = text.replace(/\n\n[ ]{0,3}(<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>[ \t]*(?=\n{2,}))/g, hashElement);
 322
 323         // PHP and ASP-style processor instructions (<?...?> and <%...%>)
 324
 325         /*
 326                 text = text.replace(/
 327                 (?:
 328                         \n\n                            // Starting after a blank line
 329                 )
 330                 (                                               // save in $1
 331                         [ ]{0,3}                        // attacklab: g_tab_width - 1
 332                         (?:
 333                                 <([?%])                 // $2
 334                                 [^\r]*?
 335                                 \2>
 336                         )
 337                         [ \t]*
 338                         (?=\n{2,})                      // followed by a blank line
 339                 )
 340                 /g,hashElement);
 341         */
 342         text = text.replace(/(?:\n\n)([ ]{0,3}(?:<([?%])[^\r]*?\2>)[ \t]*(?=\n{2,}))/g,hashElement);
 343
 344         return text;
 345 }
 346
 347 var hashElement = function(wholeMatch,m1) {
 348         var blockText = m1;
 349
 350         // Undo double lines
 351         blockText = blockText.replace(/^\n+/,"");
 352
 353         // strip trailing blank lines
 354         blockText = blockText.replace(/\n+$/g,"");
 355
 356         // Replace the element text with a marker ("~KxK" where x is its key)
 357         blockText = "\n\n~K" + (g_html_blocks.push(blockText)-1) + "K\n\n";
 358
 359         return blockText;
 360 };
 361
 362 var _RunBlockGamut = function(text, doNotUnhash) {
 363 //
 364 // These are all the transformations that form block-level
 365 // tags like paragraphs, headers, and list items.
 366 //
 367         text = _DoHeaders(text);
 368
 369         // Do Horizontal Rules:
 370         var key = hashBlock("<hr />");
 371         text = text.replace(/^[ ]{0,2}([ ]?\*[ ]?){3,}[ \t]*$/gm,key);
 372         text = text.replace(/^[ ]{0,2}([ ]?-[ ]?){3,}[ \t]*$/gm,key);
 373         text = text.replace(/^[ ]{0,2}([ ]?_[ ]?){3,}[ \t]*$/gm,key);
 374
 375         text = _DoLists(text);
 376         text = _DoCodeBlocks(text);
 377         text = _DoBlockQuotes(text);
 378
 379         // We already ran _HashHTMLBlocks() before, in Markdown(), but that
 380         // was to escape raw HTML in the original Markdown source. This time,
 381         // we're escaping the markup we've just created, so that we don't wrap
 382         // <p> tags around block-level tags.
 383         text = _HashHTMLBlocks(text);
 384     text = _FormParagraphs(text, doNotUnhash);
 385
 386         return text;
 387 }
 388
 389
 390 var _RunSpanGamut = function(text) {
 391 //
 392 // These are all the transformations that occur *within* block-level
 393 // tags like paragraphs, headers, and list items.
 394 //
 395
 396         text = _DoCodeSpans(text);
 397         text = _EscapeSpecialCharsWithinTagAttributes(text);
 398         text = _EncodeBackslashEscapes(text);
 399
 400         // Process anchor and image tags. Images must come first,
 401         // because ![foo][f] looks like an anchor.
 402         text = _DoImages(text);
 403         text = _DoAnchors(text);
 404
 405         // Make links out of things like `<http://example.com/>`
 406         // Must come after _DoAnchors(), because you can use < and >
 407         // delimiters in inline links like [this](<url>).
 408         text = _DoAutoLinks(text);
 409         text = _EncodeAmpsAndAngles(text);
 410         text = _DoItalicsAndBold(text);
 411
 412         // Do hard breaks:
 413         text = text.replace(/  +\n/g," <br />\n");
 414
 415         return text;
 416 }
 417
 418 var _EscapeSpecialCharsWithinTagAttributes = function(text) {
 419 //
 420 // Within tags -- meaning between < and > -- encode [\ ` * _] so they
 421 // don't conflict with their use in Markdown for code, italics and strong.
 422 //
 423
 424         // Build a regex to find HTML tags and comments.  See Friedl's
 425     // "Mastering Regular Expressions", 2nd Ed., pp. 200-201.
 426
 427     // SE: changed the comment part of the regex
 428
 429     var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>)/gi;
 430
 431         text = text.replace(regex, function(wholeMatch) {
 432                 var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g,"$1`");
 433                 tag = escapeCharacters(tag,"\\`*_");
 434                 return tag;
 435         });
 436
 437         return text;
 438 }
 439
 440 var _DoAnchors = function(text) {
 441 //
 442 // Turn Markdown link shortcuts into XHTML <a> tags.
 443 //
 444         //
 445         // First, handle reference-style links: [link text] [id]
 446         //
 447
 448         /*
 449                 text = text.replace(/
 450                 (                                                       // wrap whole match in $1
 451                         \[
 452                         (
 453                                 (?:
 454                                         \[[^\]]*\]              // allow brackets nested one level
 455                                         |
 456                                         [^\[]                   // or anything else
 457                                 )*
 458                         )
 459                         \]
 460
 461                         [ ]?                                    // one optional space
 462                         (?:\n[ ]*)?                             // one optional newline followed by spaces
 463
 464                         \[
 465                         (.*?)                                   // id = $3
 466                         \]
 467                 )()()()()                                       // pad remaining backreferences
 468                 /g,_DoAnchors_callback);
 469         */
 470         text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,writeAnchorTag);
 471
 472         //
 473         // Next, inline-style links: [link text](url "optional title")
 474         //
 475
 476         /*
 477                 text = text.replace(/
 478                 (                                               // wrap whole match in $1
 479                         \[
 480                                 (
 481                                         (?:
 482                                                 \[[^\]]*\]      // allow brackets nested one level
 483                                             |
 484                                             [^\[\]]             // or anything else
 485                                     )*
 486                             )
 487                         \]
 488                         \(                                              // literal paren
 489                         [ \t]*
 490                         ()                                              // no id, so leave $3 empty
 491                         <?(                     // href = $4
 492                 (?:
 493                     \([^)]*\)       // allow one level of (correctly nested) parens (think MSDN)
 494                     |
 495                     [^()]
 496                 )*?
 497             )>?
 498                         [ \t]*
 499                         (                                               // $5
 500                                 (['"])                          // quote char = $6
 501                                 (.*?)                           // Title = $7
 502                                 \6                                      // matching quote
 503                                 [ \t]*                          // ignore any spaces/tabs between closing quote and )
 504                         )?                                              // title is optional
 505                         \)
 506                 )
 507                 /g,writeAnchorTag);
 508         */
 509
 510         text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\]\([ \t]*()<?((?:\([^)]*\)|[^()])*?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,writeAnchorTag);
 511
 512         //
 513         // Last, handle reference-style shortcuts: [link text]
 514         // These must come last in case you've also got [link test][1]
 515         // or [link test](/foo)
 516         //
 517
 518         /*
 519                 text = text.replace(/
 520                 (                                                       // wrap whole match in $1
 521                         \[
 522                         ([^\[\]]+)                              // link text = $2; can't contain '[' or ']'
 523                         \]
 524                 )()()()()()                                     // pad rest of backreferences
 525                 /g, writeAnchorTag);
 526         */
 527         text = text.replace(/(\[([^\[\]]+)\])()()()()()/g, writeAnchorTag);
 528
 529         return text;
 530 }
 531
 532 var writeAnchorTag = function(wholeMatch,m1,m2,m3,m4,m5,m6,m7) {
 533         if (m7 == undefined) m7 = "";
 534         var whole_match = m1;
 535         var link_text   = m2;
 536         var link_id      = m3.toLowerCase();
 537         var url         = m4;
 538         var title       = m7;
 539
 540         if (url == "") {
 541                 if (link_id == "") {
 542                         // lower-case and turn embedded newlines into spaces
 543                         link_id = link_text.toLowerCase().replace(/ ?\n/g," ");
 544                 }
 545                 url = "#"+link_id;
 546
 547                 if (g_urls.get(link_id) != undefined) {
 548                         url = g_urls.get(link_id);
 549                         if (g_titles.get(link_id) != undefined) {
 550                                 title = g_titles.get(link_id);
 551                         }
 552                 }
 553                 else {
 554                         if (whole_match.search(/\(\s*\)$/m)>-1) {
 555                                 // Special case for explicit empty url
 556                                 url = "";
 557                         } else {
 558                                 return whole_match;
 559                         }
 560                 }
 561         }
 562
 563         url = escapeCharacters(url,"*_");
 564         var result = "<a href=\"" + url + "\"";
 565
 566         if (title != "") {
 567                 title = title.replace(/"/g,"&quot;");
 568                 title = escapeCharacters(title,"*_");
 569                 result +=  " title=\"" + title + "\"";
 570         }
 571
 572         result += ">" + link_text + "</a>";
 573
 574         return result;
 575 }
 576
 577
 578 var _DoImages = function(text) {
 579 //
 580 // Turn Markdown image shortcuts into <img> tags.
 581 //
 582
 583         //
 584         // First, handle reference-style labeled images: ![alt text][id]
 585         //
 586
 587         /*
 588                 text = text.replace(/
 589                 (                                               // wrap whole match in $1
 590                         !\[
 591                         (.*?)                           // alt text = $2
 592                         \]
 593
 594                         [ ]?                            // one optional space
 595                         (?:\n[ ]*)?                     // one optional newline followed by spaces
 596
 597                         \[
 598                         (.*?)                           // id = $3
 599                         \]
 600                 )()()()()                               // pad rest of backreferences
 601                 /g,writeImageTag);
 602         */
 603         text = text.replace(/(!\[(.*?)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g,writeImageTag);
 604
 605         //
 606         // Next, handle inline images:  ![alt text](url "optional title")
 607         // Don't forget: encode * and _
 608
 609         /*
 610                 text = text.replace(/
 611                 (                                               // wrap whole match in $1
 612                         !\[
 613                         (.*?)                           // alt text = $2
 614                         \]
 615                         \s?                                     // One optional whitespace character
 616                         \(                                      // literal paren
 617                         [ \t]*
 618                         ()                                      // no id, so leave $3 empty
 619                         <?(\S+?)>?                      // src url = $4
 620                         [ \t]*
 621                         (                                       // $5
 622                                 (['"])                  // quote char = $6
 623                                 (.*?)                   // title = $7
 624                                 \6                              // matching quote
 625                                 [ \t]*
 626                         )?                                      // title is optional
 627                 \)
 628                 )
 629                 /g,writeImageTag);
 630         */
 631         text = text.replace(/(!\[(.*?)\]\s?\([ \t]*()<?(\S+?)>?[ \t]*((['"])(.*?)\6[ \t]*)?\))/g,writeImageTag);
 632
 633         return text;
 634 }
 635
 636 var writeImageTag = function(wholeMatch,m1,m2,m3,m4,m5,m6,m7) {
 637         var whole_match = m1;
 638         var alt_text   = m2;
 639         var link_id      = m3.toLowerCase();
 640         var url         = m4;
 641         var title       = m7;
 642
 643         if (!title) title = "";
 644
 645         if (url == "") {
 646                 if (link_id == "") {
 647                         // lower-case and turn embedded newlines into spaces
 648                         link_id = alt_text.toLowerCase().replace(/ ?\n/g," ");
 649                 }
 650                 url = "#"+link_id;
 651
 652                 if (g_urls.get(link_id) != undefined) {
 653                         url = g_urls.get(link_id);
 654                         if (g_titles.get(link_id) != undefined) {
 655                                 title = g_titles.get(link_id);
 656                         }
 657                 }
 658                 else {
 659                         return whole_match;
 660                 }
 661         }
 662
 663         alt_text = alt_text.replace(/"/g,"&quot;");
 664         url = escapeCharacters(url,"*_");
 665         var result = "<img src=\"" + url + "\" alt=\"" + alt_text + "\"";
 666
 667         // attacklab: Markdown.pl adds empty title attributes to images.
 668         // Replicate this bug.
 669
 670         //if (title != "") {
 671                 title = title.replace(/"/g,"&quot;");
 672                 title = escapeCharacters(title,"*_");
 673                 result +=  " title=\"" + title + "\"";
 674         //}
 675
 676         result += " />";
 677
 678         return result;
 679 }
 680
 681
 682 var _DoHeaders = function(text) {
 683
 684         // Setext-style headers:
 685         //      Header 1
 686         //      ========
 687         //
 688         //      Header 2
 689         //      --------
 690         //
 691         text = text.replace(/^(.+)[ \t]*\n=+[ \t]*\n+/gm,
 692                 function(wholeMatch,m1){return "<h1>" + _RunSpanGamut(m1) + "</h1>\n\n";});
 693
 694         text = text.replace(/^(.+)[ \t]*\n-+[ \t]*\n+/gm,
 695                 function(matchFound,m1){return "<h2>" + _RunSpanGamut(m1) + "</h2>\n\n";});
 696
 697         // atx-style headers:
 698         //  # Header 1
 699         //  ## Header 2
 700         //  ## Header 2 with closing hashes ##
 701         //  ...
 702         //  ###### Header 6
 703         //
 704
 705         /*
 706                 text = text.replace(/
 707                         ^(\#{1,6})                              // $1 = string of #'s
 708                         [ \t]*
 709                         (.+?)                                   // $2 = Header text
 710                         [ \t]*
 711                         \#*                                             // optional closing #'s (not counted)
 712                         \n+
 713                 /gm, function() {...});
 714         */
 715
 716         text = text.replace(/^(\#{1,6})[ \t]*(.+?)[ \t]*\#*\n+/gm,
 717                 function(wholeMatch,m1,m2) {
 718                         var h_level = m1.length;
 719                         return "<h" + h_level + ">" + _RunSpanGamut(m2) + "</h" + h_level + ">\n\n";
 720                 });
 721
 722         return text;
 723 }
 724
 725 // This declaration keeps Dojo compressor from outputting garbage:
 726 var _ProcessListItems;
 727
 728 var _DoLists = function(text) {
 729 //
 730 // Form HTML ordered (numbered) and unordered (bulleted) lists.
 731 //
 732
 733         // attacklab: add sentinel to hack around khtml/safari bug:
 734         // http://bugs.webkit.org/show_bug.cgi?id=11231
 735         text += "~0";
 736
 737         // Re-usable pattern to match any entirel ul or ol list:
 738
 739         /*
 740                 var whole_list = /
 741                 (                                                                       // $1 = whole list
 742                         (                                                               // $2
 743                                 [ ]{0,3}                                        // attacklab: g_tab_width - 1
 744                                 ([*+-]|\d+[.])                          // $3 = first list item marker
 745                                 [ \t]+
 746                         )
 747                         [^\r]+?
 748                         (                                                               // $4
 749                                 ~0                                                      // sentinel for workaround; should be $
 750                         |
 751                                 \n{2,}
 752                                 (?=\S)
 753                                 (?!                                                     // Negative lookahead for another list item marker
 754                                         [ \t]*
 755                                         (?:[*+-]|\d+[.])[ \t]+
 756                                 )
 757                         )
 758                 )/g
 759         */
 760         var whole_list = /^(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/gm;
 761
 762         if (g_list_level) {
 763                 text = text.replace(whole_list,function(wholeMatch,m1,m2) {
 764                         var list = m1;
 765                         var list_type = (m2.search(/[*+-]/g)>-1) ? "ul" : "ol";
 766
 767                         var result = _ProcessListItems(list, list_type);
 768
 769                         // Trim any trailing whitespace, to put the closing `</$list_type>`
 770                         // up on the preceding line, to get it past the current stupid
 771                         // HTML block parser. This is a hack to work around the terrible
 772                         // hack that is the HTML block parser.
 773                         result = result.replace(/\s+$/,"");
 774                         result = "<"+list_type+">" + result + "</"+list_type+">\n";
 775                         return result;
 776                 });
 777         } else {
 778                 whole_list = /(\n\n|^\n?)(([ ]{0,3}([*+-]|\d+[.])[ \t]+)[^\r]+?(~0|\n{2,}(?=\S)(?![ \t]*(?:[*+-]|\d+[.])[ \t]+)))/g;
 779                 text = text.replace(whole_list,function(wholeMatch,m1,m2,m3) {
 780                         var runup = m1;
 781                         var list = m2;
 782
 783                         var list_type = (m3.search(/[*+-]/g)>-1) ? "ul" : "ol";
 784                         var result = _ProcessListItems(list, list_type);
 785                         result = runup + "<"+list_type+">\n" + result + "</"+list_type+">\n";
 786                         return result;
 787                 });
 788         }
 789
 790         // attacklab: strip sentinel
 791         text = text.replace(/~0/,"");
 792
 793         return text;
 794 }
 795
 796 var _listItemMarkers = { ol: "\\d+[.]", ul: "[*+-]" };
 797
 798 _ProcessListItems = function(list_str, list_type) {
 799 //
 800 //  Process the contents of a single ordered or unordered list, splitting it
 801 //  into individual list items.
 802 //
 803 //  list_type is either "ul" or "ol".
 804
 805         // The $g_list_level global keeps track of when we're inside a list.
 806         // Each time we enter a list, we increment it; when we leave a list,
 807         // we decrement. If it's zero, we're not in a list anymore.
 808         //
 809         // We do this because when we're not inside a list, we want to treat
 810         // something like this:
 811         //
 812         //    I recommend upgrading to version
 813         //    8. Oops, now this line is treated
 814         //    as a sub-list.
 815         //
 816         // As a single paragraph, despite the fact that the second line starts
 817         // with a digit-period-space sequence.
 818         //
 819         // Whereas when we're inside a list (or sub-list), that line will be
 820         // treated as the start of a sub-list. What a kludge, huh? This is
 821         // an aspect of Markdown's syntax that's hard to parse perfectly
 822         // without resorting to mind-reading. Perhaps the solution is to
 823         // change the syntax rules such that sub-lists must start with a
 824         // starting cardinal number; e.g. "1." or "a.".
 825
 826         g_list_level++;
 827
 828         // trim trailing blank lines:
 829         list_str = list_str.replace(/\n{2,}$/,"\n");
 830
 831         // attacklab: add sentinel to emulate \z
 832         list_str += "~0";
 833
 834         // In the original attacklab WMD, list_type was not given to this function, and anything
 835         // that matched /[*+-]|\d+[.]/ would just create the next <li>, causing this mismatch:
 836         //
 837     //  Markdown          rendered by WMD        rendered by MarkdownSharp
 838         //  ------------------------------------------------------------------
 839         //  1. first          1. first               1. first
 840         //  2. second         2. second              2. second
 841         //  - third           3. third                   * third
 842         //
 843         // We changed this to behave identical to MarkdownSharp. This is the constructed RegEx,
 844     // with {MARKER} being one of \d+[.] or [*+-], depending on list_type:
 845         /*
 846                 list_str = list_str.replace(/
 847                         (^[ \t]*)                                               // leading whitespace = $1
 848                         ({MARKER}) [ \t]+                       // list marker = $2
 849                         ([^\r]+?                                                // list item text   = $3
 850                         (\n+))
 851                         (?= (~0 | \2 ({MARKER}) [ \t]+))
 852                 /gm, function(){...});
 853         */
 854
 855     var marker = _listItemMarkers[list_type];
 856     var re = new RegExp("(^[ \\t]*)(" + marker + ")[ \\t]+([^\\r]+?(\\n+))(?=(~0|\\1(" + marker + ")[ \\t]+))", "gm");
 857     var last_item_had_a_double_newline = false;
 858         list_str = list_str.replace(re,
 859                 function(wholeMatch,m1,m2,m3){
 860                         var item = m3;
 861                         var leading_space = m1;
 862             var ends_with_double_newline = /\n\n$/.test(item);
 863                         var contains_double_newline = ends_with_double_newline || item.search(/\n{2,}/)>-1;
 864
 865                         if (contains_double_newline || last_item_had_a_double_newline) {
 866                                 item =  _RunBlockGamut(_Outdent(item), /* doNotUnhash = */ true);
 867                         }
 868                         else {
 869                                 // Recursion for sub-lists:
 870                                 item = _DoLists(_Outdent(item));
 871                                 item = item.replace(/\n$/,""); // chomp(item)
 872                                 item = _RunSpanGamut(item);
 873             }
 874             last_item_had_a_double_newline = ends_with_double_newline;
 875                         return  "<li>" + item + "</li>\n";
 876                 }
 877         );
 878
 879         // attacklab: strip sentinel
 880         list_str = list_str.replace(/~0/g,"");
 881
 882         g_list_level--;
 883         return list_str;
 884 }
 885
 886
 887 var _DoCodeBlocks = function(text) {
 888 //
 889 //  Process Markdown `<pre><code>` blocks.
 890 //
 891
 892         /*
 893                 text = text.replace(text,
 894                         /(?:\n\n|^)
 895                         (                                                               // $1 = the code block -- one or more lines, starting with a space/tab
 896                                 (?:
 897                                         (?:[ ]{4}|\t)                   // Lines must start with a tab or a tab-width of spaces - attacklab: g_tab_width
 898                                         .*\n+
 899                                 )+
 900                         )
 901                         (\n*[ ]{0,3}[^ \t\n]|(?=~0))    // attacklab: g_tab_width
 902                 /g,function(){...});
 903         */
 904
 905         // attacklab: sentinel workarounds for lack of \A and \Z, safari\khtml bug
 906         text += "~0";
 907
 908         text = text.replace(/(?:\n\n|^)((?:(?:[ ]{4}|\t).*\n+)+)(\n*[ ]{0,3}[^ \t\n]|(?=~0))/g,
 909                 function(wholeMatch,m1,m2) {
 910                         var codeblock = m1;
 911                         var nextChar = m2;
 912
 913                         codeblock = _EncodeCode( _Outdent(codeblock));
 914                         codeblock = _Detab(codeblock);
 915                         codeblock = codeblock.replace(/^\n+/g,""); // trim leading newlines
 916                         codeblock = codeblock.replace(/\n+$/g,""); // trim trailing whitespace
 917
 918                         codeblock = "<pre><code>" + codeblock + "\n</code></pre>";
 919
 920                         return "\n\n" + codeblock + "\n\n" + nextChar;
 921                 }
 922         );
 923
 924         // attacklab: strip sentinel
 925         text = text.replace(/~0/,"");
 926
 927         return text;
 928 }
 929
 930 var hashBlock = function(text) {
 931         text = text.replace(/(^\n+|\n+$)/g,"");
 932         return "\n\n~K" + (g_html_blocks.push(text)-1) + "K\n\n";
 933 }
 934
 935
 936 var _DoCodeSpans = function(text) {
 937 //
 938 //   *  Backtick quotes are used for <code></code> spans.
 939 //
 940 //   *  You can use multiple backticks as the delimiters if you want to
 941 //       include literal backticks in the code span. So, this input:
 942 //
 943 //               Just type ``foo `bar` baz`` at the prompt.
 944 //
 945 //         Will translate to:
 946 //
 947 //               <p>Just type <code>foo `bar` baz</code> at the prompt.</p>
 948 //
 949 //      There's no arbitrary limit to the number of backticks you
 950 //      can use as delimters. If you need three consecutive backticks
 951 //      in your code, use four for delimiters, etc.
 952 //
 953 //  *  You can use spaces to get literal backticks at the edges:
 954 //
 955 //               ... type `` `bar` `` ...
 956 //
 957 //         Turns to:
 958 //
 959 //               ... type <code>`bar`</code> ...
 960 //
 961
 962         /*
 963                 text = text.replace(/
 964                         (^|[^\\])                                       // Character before opening ` can't be a backslash
 965                         (`+)                                            // $2 = Opening run of `
 966                         (                                                       // $3 = The code block
 967                                 [^\r]*?
 968                                 [^`]                                    // attacklab: work around lack of lookbehind
 969                         )
 970                         \2                                                      // Matching closer
 971                         (?!`)
 972                 /gm, function(){...});
 973         */
 974
 975         text = text.replace(/(^|[^\\])(`+)([^\r]*?[^`])\2(?!`)/gm,
 976                 function(wholeMatch,m1,m2,m3,m4) {
 977                         var c = m3;
 978                         c = c.replace(/^([ \t]*)/g,""); // leading whitespace
 979                         c = c.replace(/[ \t]*$/g,"");   // trailing whitespace
 980                         c = _EncodeCode(c);
 981                         return m1+"<code>"+c+"</code>";
 982                 });
 983
 984         return text;
 985 }
 986
 987
 988 var _EncodeCode = function(text) {
 989 //
 990 // Encode/escape certain characters inside Markdown code runs.
 991 // The point is that in code, these characters are literals,
 992 // and lose their special Markdown meanings.
 993 //
 994         // Encode all ampersands; HTML entities are not
 995         // entities within a Markdown code span.
 996         text = text.replace(/&/g,"&amp;");
 997
 998         // Do the angle bracket song and dance:
 999         text = text.replace(/</g,"&lt;");
1000         text = text.replace(/>/g,"&gt;");
1001
1002         // Now, escape characters that are magic in Markdown:
1003         text = escapeCharacters(text,"\*_{}[]\\",false);
1004
1005 // jj the line above breaks this:
1006 //---
1007
1008 //* Item
1009
1010 //   1. Subitem
1011
1012 //            special char: *
1013 //---
1014
1015         return text;
1016 }
1017
1018
1019 var _DoItalicsAndBold = function(text) {
1020
1021         // <strong> must go first:
1022         text = text.replace(/(\*\*|__)(?=\S)([^\r]*?\S[\*_]*)\1/g,
1023                 "<strong>$2</strong>");
1024
1025         text = text.replace(/(\*|_)(?=\S)([^\r]*?\S)\1/g,
1026                 "<em>$2</em>");
1027
1028         return text;
1029 }
1030
1031
1032 var _DoBlockQuotes = function(text) {
1033
1034         /*
1035                 text = text.replace(/
1036                 (                                                               // Wrap whole match in $1
1037                         (
1038                                 ^[ \t]*>[ \t]?                  // '>' at the start of a line
1039                                 .+\n                                    // rest of the first line
1040                                 (.+\n)*                                 // subsequent consecutive lines
1041                                 \n*                                             // blanks
1042                         )+
1043                 )
1044                 /gm, function(){...});
1045         */
1046
1047         text = text.replace(/((^[ \t]*>[ \t]?.+\n(.+\n)*\n*)+)/gm,
1048                 function(wholeMatch,m1) {
1049                         var bq = m1;
1050
1051                         // attacklab: hack around Konqueror 3.5.4 bug:
1052                         // "----------bug".replace(/^-/g,"") == "bug"
1053
1054                         bq = bq.replace(/^[ \t]*>[ \t]?/gm,"~0");       // trim one level of quoting
1055
1056                         // attacklab: clean up hack
1057                         bq = bq.replace(/~0/g,"");
1058
1059                         bq = bq.replace(/^[ \t]+$/gm,"");               // trim whitespace-only lines
1060                         bq = _RunBlockGamut(bq);                                // recurse
1061
1062                         bq = bq.replace(/(^|\n)/g,"$1  ");
1063                         // These leading spaces screw with <pre> content, so we need to fix that:
1064                         bq = bq.replace(
1065                                         /(\s*<pre>[^\r]+?<\/pre>)/gm,
1066                                 function(wholeMatch,m1) {
1067                                         var pre = m1;
1068                                         // attacklab: hack around Konqueror 3.5.4 bug:
1069                                         pre = pre.replace(/^  /mg,"~0");
1070                                         pre = pre.replace(/~0/g,"");
1071                                         return pre;
1072                                 });
1073
1074                         return hashBlock("<blockquote>\n" + bq + "\n</blockquote>");
1075                 });
1076         return text;
1077 }
1078
1079
1080 var _FormParagraphs = function(text, doNotUnhash) {
1081 //
1082 //  Params:
1083 //    $text - string to process with html <p> tags
1084 //
1085
1086         // Strip leading and trailing lines:
1087         text = text.replace(/^\n+/g,"");
1088         text = text.replace(/\n+$/g,"");
1089
1090         var grafs = text.split(/\n{2,}/g);
1091         var grafsOut = new Array();
1092
1093         //
1094         // Wrap <p> tags.
1095         //
1096         var end = grafs.length;
1097         for (var i=0; i<end; i++) {
1098                 var str = grafs[i];
1099
1100                 // if this is an HTML marker, copy it
1101                 if (str.search(/~K(\d+)K/g) >= 0) {
1102                         grafsOut.push(str);
1103                 }
1104                 else if (str.search(/\S/) >= 0) {
1105                         str = _RunSpanGamut(str);
1106                         str = str.replace(/^([ \t]*)/g,"<p>");
1107                         str += "</p>"
1108                         grafsOut.push(str);
1109                 }
1110
1111         }
1112         //
1113         // Unhashify HTML blocks
1114         //
1115     if (!doNotUnhash) {
1116         end = grafsOut.length;
1117             for (var i=0; i<end; i++) {
1118                     // if this is a marker for an html block...
1119                     while (grafsOut[i].search(/~K(\d+)K/) >= 0) {
1120                             var blockText = g_html_blocks[RegExp.$1];
1121                             blockText = blockText.replace(/\$/g,"$$$$"); // Escape any dollar signs
1122                             grafsOut[i] = grafsOut[i].replace(/~K\d+K/,blockText);
1123                     }
1124             }
1125     }
1126         return grafsOut.join("\n\n");
1127 }
1128
1129
1130 var _EncodeAmpsAndAngles = function(text) {
1131 // Smart processing for ampersands and angle brackets that need to be encoded.
1132
1133         // Ampersand-encoding based entirely on Nat Irons's Amputator MT plugin:
1134         //   http://bumppo.net/projects/amputator/
1135         text = text.replace(/&(?!#?[xX]?(?:[0-9a-fA-F]+|\w+);)/g,"&amp;");
1136
1137         // Encode naked <'s
1138         text = text.replace(/<(?![a-z\/?\$!])/gi,"&lt;");
1139
1140         return text;
1141 }
1142
1143
1144 var _EncodeBackslashEscapes = function(text) {
1145 //
1146 //   Parameter:  String.
1147 //   Returns:   The string, with after processing the following backslash
1148 //                         escape sequences.
1149 //
1150
1151         // attacklab: The polite way to do this is with the new
1152         // escapeCharacters() function:
1153         //
1154         //      text = escapeCharacters(text,"\\",true);
1155         //      text = escapeCharacters(text,"`*_{}[]()>#+-.!",true);
1156         //
1157         // ...but we're sidestepping its use of the (slow) RegExp constructor
1158         // as an optimization for Firefox.  This function gets called a LOT.
1159
1160         text = text.replace(/\\(\\)/g,escapeCharacters_callback);
1161         text = text.replace(/\\([`*_{}\[\]()>#+-.!])/g,escapeCharacters_callback);
1162         return text;
1163 }
1164
1165
1166 var _DoAutoLinks = function(text) {
1167
1168         text = text.replace(/<((https?|ftp|dict):[^'">\s]+)>/gi,"<a href=\"$1\">$1</a>");
1169
1170         // Email addresses: <address@domain.foo>
1171
1172         /*
1173                 text = text.replace(/
1174                         <
1175                         (?:mailto:)?
1176                         (
1177                                 [-.\w]+
1178                                 \@
1179                                 [-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+
1180                         )
1181                         >
1182                 /gi, _DoAutoLinks_callback());
1183         */
1184         text = text.replace(/<(?:mailto:)?([-.\w]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+)>/gi,
1185                 function(wholeMatch,m1) {
1186                         return _EncodeEmailAddress( _UnescapeSpecialChars(m1) );
1187                 }
1188         );
1189
1190         return text;
1191 }
1192
1193
1194 var _EncodeEmailAddress = function(addr) {
1195 //
1196 //  Input: an email address, e.g. "foo@example.com"
1197 //
1198 //  Output: the email address as a mailto link, with each character
1199 //      of the address encoded as either a decimal or hex entity, in
1200 //      the hopes of foiling most address harvesting spam bots. E.g.:
1201 //
1202 //      <a href="&#x6D;&#97;&#105;&#108;&#x74;&#111;:&#102;&#111;&#111;&#64;&#101;
1203 //         x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;">&#102;&#111;&#111;
1204 //         &#64;&#101;x&#x61;&#109;&#x70;&#108;&#x65;&#x2E;&#99;&#111;&#109;</a>
1205 //
1206 //  Based on a filter by Matthew Wickline, posted to the BBEdit-Talk
1207 //  mailing list: <http://tinyurl.com/yu7ue>
1208 //
1209
1210         // attacklab: why can't javascript speak hex?
1211         function char2hex(ch) {
1212                 var hexDigits = '0123456789ABCDEF';
1213                 var dec = ch.charCodeAt(0);
1214                 return(hexDigits.charAt(dec>>4) + hexDigits.charAt(dec&15));
1215         }
1216
1217         var encode = [
1218                 function(ch){return "&#"+ch.charCodeAt(0)+";";},
1219                 function(ch){return "&#x"+char2hex(ch)+";";},
1220                 function(ch){return ch;}
1221         ];
1222
1223         addr = "mailto:" + addr;
1224
1225         addr = addr.replace(/./g, function(ch) {
1226                 if (ch == "@") {
1227                         // this *must* be encoded. I insist.
1228                         ch = encode[Math.floor(Math.random()*2)](ch);
1229                 } else if (ch !=":") {
1230                         // leave ':' alone (to spot mailto: later)
1231                         var r = Math.random();
1232                         // roughly 10% raw, 45% hex, 45% dec
1233                         ch =  (
1234                                         r > .9  ?       encode[2](ch)   :
1235                                         r > .45 ?       encode[1](ch)   :
1236                                                                 encode[0](ch)
1237                                 );
1238                 }
1239                 return ch;
1240         });
1241
1242         addr = "<a href=\"" + addr + "\">" + addr + "</a>";
1243         addr = addr.replace(/">.+:/g,"\">"); // strip the mailto: from the visible part
1244
1245         return addr;
1246 }
1247
1248
1249 var _UnescapeSpecialChars = function(text) {
1250 //
1251 // Swap back in all the special characters we've hidden.
1252 //
1253         text = text.replace(/~E(\d+)E/g,
1254                 function(wholeMatch,m1) {
1255                         var charCodeToReplace = parseInt(m1);
1256                         return String.fromCharCode(charCodeToReplace);
1257                 }
1258         );
1259         return text;
1260 }
1261
1262
1263 var _Outdent = function(text) {
1264 //
1265 // Remove one level of line-leading tabs or spaces
1266 //
1267
1268         // attacklab: hack around Konqueror 3.5.4 bug:
1269         // "----------bug".replace(/^-/g,"") == "bug"
1270
1271         text = text.replace(/^(\t|[ ]{1,4})/gm,"~0"); // attacklab: g_tab_width
1272
1273         // attacklab: clean up hack
1274         text = text.replace(/~0/g,"")
1275
1276         return text;
1277 }
1278
1279 var _Detab = function (text) {
1280         if (!/\t/.test(text))
1281                 return text;
1282
1283         var spaces = ["    ", "   ", "  ", " "],
1284                 skew = 0,
1285                 v;
1286
1287         return text.replace(/[\n\t]/g, function (match, offset) {
1288                 if (match === "\n") {
1289                         skew = offset + 1;
1290                         return match;
1291                 }
1292                 v = (offset - skew) % 4;
1293                 skew = offset + 1;
1294                 return spaces[v];
1295         });
1296 }
1297
1298 //
1299 //  attacklab: Utility functions
1300 //
1301
1302
1303 var escapeCharacters = function(text, charsToEscape, afterBackslash) {
1304         // First we have to escape the escape characters so that
1305         // we can build a character class out of them
1306         var regexString = "([" + charsToEscape.replace(/([\[\]\\])/g,"\\$1") + "])";
1307
1308         if (afterBackslash) {
1309                 regexString = "\\\\" + regexString;
1310         }
1311
1312         var regex = new RegExp(regexString,"g");
1313         text = text.replace(regex,escapeCharacters_callback);
1314
1315         return text;
1316 }
1317
1318
1319 var escapeCharacters_callback = function(wholeMatch,m1) {
1320         var charCodeToEscape = m1.charCodeAt(0);
1321         return "~E"+charCodeToEscape+"E";
1322 }
1323
1324 } // end of Attacklab.showdown.converter
1325
1326
1327 // Version 0.9 used the Showdown namespace instead of Attacklab.showdown
1328 // The old namespace is deprecated, but we'll support it for now:
1329 var Showdown = Attacklab.showdown;
1330
1331 // If anyone's interested, tell the world that this file's been loaded
1332 if (Attacklab.fileLoaded) {
1333         Attacklab.fileLoaded("showdown.js");
1334 }