includes/Parser.php

   1 <?php
   2
   3 require_once('Tokenizer.php');
   4
   5 if( $GLOBALS['wgUseWikiHiero'] ){
   6         require_once('extensions/wikihiero/wikihiero.php');
   7 }
   8 if( $GLOBALS['wgUseTimeline'] ){
   9         require_once('extensions/timeline/Timeline.php');
  10 }
  11
  12 # PHP Parser
  13 #
  14 # Processes wiki markup
  15 #
  16 # There are two main entry points into the Parser class: parse() and preSaveTransform().
  17 # The parse() function produces HTML output, preSaveTransform() produces altered wiki markup.
  18 #
  19 # Globals used:
  20 #    objects:   $wgLang, $wgDateFormatter, $wgLinkCache, $wgCurParser
  21 #
  22 # NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  23 #
  24 #    settings:  $wgUseTex*, $wgUseCategoryMagic*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  25 #               $wgNamespacesWithSubpages, $wgLanguageCode, $wgAllowExternalImages*,
  26 #               $wgLocaltimezone
  27 #
  28 #      * only within ParserOptions
  29 #
  30 #
  31 #----------------------------------------
  32 #    Variable substitution O(N^2) attack
  33 #-----------------------------------------
  34 # Without countermeasures, it would be possible to attack the parser by saving a page
  35 # filled with a large number of inclusions of large pages. The size of the generated
  36 # page would be proportional to the square of the input size. Hence, we limit the number
  37 # of inclusions of any given page, thus bringing any attack back to O(N).
  38 #
  39
  40 define( "MAX_INCLUDE_REPEAT", 5 );
  41
  42 # Allowed values for $mOutputType
  43 define( "OT_HTML", 1 );
  44 define( "OT_WIKI", 2 );
  45 define( "OT_MSG", 3 );
  46
  47 # string parameter for extractTags which will cause it
  48 # to strip HTML comments in addition to regular
  49 # <XML>-style tags. This should not be anything we
  50 # may want to use in wikisyntax
  51 define( "STRIP_COMMENTS", "HTMLCommentStrip" );
  52
  53 # prefix for escaping, used in two functions at least
  54 define( "UNIQ_PREFIX", "NaodW29");
  55
  56 class Parser
  57 {
  58         # Cleared with clearState():
  59         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
  60         var $mVariables, $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
  61
  62         # Temporary:
  63         var $mOptions, $mTitle, $mOutputType;
  64
  65         function Parser()
  66         {
  67                 $this->clearState();
  68         }
  69
  70         function clearState()
  71         {
  72                 $this->mOutput = new ParserOutput;
  73                 $this->mAutonumber = 0;
  74                 $this->mLastSection = "";
  75                 $this->mDTopen = false;
  76                 $this->mVariables = false;
  77                 $this->mIncludeCount = array();
  78                 $this->mStripState = array();
  79                 $this->mArgStack = array();
  80         }
  81
  82         # First pass--just handle <nowiki> sections, pass the rest off
  83         # to internalParse() which does all the real work.
  84         #
  85         # Returns a ParserOutput
  86         #
  87         function parse( $text, &$title, $options, $linestart = true, $clearState = true )
  88         {
  89                 global $wgUseTidy;
  90                 $fname = "Parser::parse";
  91                 wfProfileIn( $fname );
  92
  93                 if ( $clearState ) {
  94                         $this->clearState();
  95                 }
  96
  97                 $this->mOptions = $options;
  98                 $this->mTitle =& $title;
  99                 $this->mOutputType = OT_HTML;
 100
 101                 $stripState = NULL;
 102                 $text = $this->strip( $text, $this->mStripState );
 103                 $text = $this->internalParse( $text, $linestart );
 104                 $text = $this->unstrip( $text, $this->mStripState );
 105                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 106                 if(!$wgUseTidy) {
 107                         $fixtags = array(
 108                                 "/<hr *>/i" => '<hr/>',
 109                                 "/<br *>/i" => '<br/>',
 110                                 "/<center *>/i"=>'<div class="center">',
 111                                 "/<\\/center *>/i" => '</div>',
 112                                 # Clean up spare ampersands; note that we probably ought to be
 113                                 # more careful about named entities.
 114                                 '/&(?!:amp;|#[Xx][0-9A-fa-f]+;|#[0-9]+;|[a-zA-Z0-9]+;)/' => '&amp;'
 115                         );
 116                         $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 117                 } else {
 118                         $fixtags = array(
 119                                 "/<center *>/i"=>'<div class="center">',
 120                                 "/<\\/center *>/i" => '</div>'
 121                         );
 122                         $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 123                 }
 124                 # only once and last
 125                 $text = $this->doBlockLevels( $text, $linestart );
 126                 if($wgUseTidy) {
 127                         $text = $this->tidy($text);
 128                 }
 129                 $this->mOutput->setText( $text );
 130                 wfProfileOut( $fname );
 131                 return $this->mOutput;
 132         }
 133
 134         /* static */ function getRandomString()
 135         {
 136                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 137         }
 138
 139         # Replaces all occurrences of <$tag>content</$tag> in the text
 140         # with a random marker and returns the new text. the output parameter
 141         # $content will be an associative array filled with data on the form
 142         # $unique_marker => content.
 143
 144         # If $content is already set, the additional entries will be appended
 145
 146         # If $tag is set to STRIP_COMMENTS, the function will extract
 147         # <!-- HTML comments -->
 148
 149         /* static */ function extractTags($tag, $text, &$content, $uniq_prefix = ""){
 150                 $rnd = $uniq_prefix . '-' . $tag . Parser::getRandomString();
 151                 if ( !$content ) {
 152                         $content = array( );
 153                 }
 154                 $n = 1;
 155                 $stripped = "";
 156
 157                 while ( "" != $text ) {
 158                         if($tag==STRIP_COMMENTS) {
 159                                 $p = preg_split( "/<!--/i", $text, 2 );
 160                         } else {
 161                                 $p = preg_split( "/<\\s*$tag\\s*>/i", $text, 2 );
 162                         }
 163                         $stripped .= $p[0];
 164                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) {
 165                                 $text = "";
 166                         } else {
 167                                 if($tag==STRIP_COMMENTS) {
 168                                         $q = preg_split( "/-->/i", $p[1], 2 );
 169                                 } else {
 170                                         $q = preg_split( "/<\\/\\s*$tag\\s*>/i", $p[1], 2 );
 171                                 }
 172                                 $marker = $rnd . sprintf("%08X", $n++);
 173                                 $content[$marker] = $q[0];
 174                                 $stripped .= $marker;
 175                                 $text = $q[1];
 176                         }
 177                 }
 178                 return $stripped;
 179         }
 180
 181         # Strips and renders <nowiki>, <pre>, <math>, <hiero>
 182         # If $render is set, performs necessary rendering operations on plugins
 183         # Returns the text, and fills an array with data needed in unstrip()
 184         # If the $state is already a valid strip state, it adds to the state
 185
 186         # When $stripcomments is set, HTML comments <!-- like this -->
 187         # will be stripped in addition to other tags. This is important
 188         # for section editing, where these comments cause confusion when
 189         # counting the sections in the wikisource
 190         function strip( $text, &$state, $stripcomments = false )
 191         {
 192                 $render = ($this->mOutputType == OT_HTML);
 193                 $nowiki_content = array();
 194                 $hiero_content = array();
 195                 $math_content = array();
 196                 $pre_content = array();
 197                 $comment_content = array();
 198
 199                 # Replace any instances of the placeholders
 200                 $uniq_prefix = UNIQ_PREFIX;
 201                 #$text = str_replace( $uniq_prefix, wfHtmlEscapeFirst( $uniq_prefix ), $text );
 202
 203                 $text = Parser::extractTags("nowiki", $text, $nowiki_content, $uniq_prefix);
 204                 foreach( $nowiki_content as $marker => $content ){
 205                         if( $render ){
 206                                 $nowiki_content[$marker] = wfEscapeHTMLTagsOnly( $content );
 207                         } else {
 208                                 $nowiki_content[$marker] = "<nowiki>$content</nowiki>";
 209                         }
 210                 }
 211
 212                 $text = Parser::extractTags("hiero", $text, $hiero_content, $uniq_prefix);
 213                 foreach( $hiero_content as $marker => $content ){
 214                         if( $render && $GLOBALS['wgUseWikiHiero']){
 215                                 $hiero_content[$marker] = WikiHiero( $content, WH_MODE_HTML);
 216                         } else {
 217                                 $hiero_content[$marker] = "<hiero>$content</hiero>";
 218                         }
 219                 }
 220
 221                 $text = Parser::extractTags("math", $text, $math_content, $uniq_prefix);
 222                 foreach( $math_content as $marker => $content ){
 223                         if( $render ) {
 224                                 if( $this->mOptions->getUseTeX() ) {
 225                                         $math_content[$marker] = renderMath( $content );
 226                                 } else {
 227                                         $math_content[$marker] = "&lt;math&gt;$content&lt;math&gt;";
 228                                 }
 229                         } else {
 230                                 $math_content[$marker] = "<math>$content</math>";
 231                         }
 232                 }
 233
 234                 $text = Parser::extractTags("pre", $text, $pre_content, $uniq_prefix);
 235                 foreach( $pre_content as $marker => $content ){
 236                         if( $render ){
 237                                 $pre_content[$marker] = "<pre>" . wfEscapeHTMLTagsOnly( $content ) . "</pre>";
 238                         } else {
 239                                 $pre_content[$marker] = "<pre>$content</pre>";
 240                         }
 241                 }
 242                 if($stripcomments) {
 243                         $text = Parser::extractTags(STRIP_COMMENTS, $text, $comment_content, $uniq_prefix);
 244                         foreach( $comment_content as $marker => $content ){
 245                                 $comment_content[$marker] = "<!--$content-->";
 246                         }
 247                 }
 248
 249                 # Merge state with the pre-existing state, if there is one
 250                 if ( $state ) {
 251                         $state['nowiki'] = $state['nowiki'] + $nowiki_content;
 252                         $state['hiero'] = $state['hiero'] + $hiero_content;
 253                         $state['math'] = $state['math'] + $math_content;
 254                         $state['pre'] = $state['pre'] + $pre_content;
 255                         $state['comment'] = $state['comment'] + $comment_content;
 256                 } else {
 257                         $state = array(
 258                           'nowiki' => $nowiki_content,
 259                           'hiero' => $hiero_content,
 260                           'math' => $math_content,
 261                           'pre' => $pre_content,
 262                           'comment' => $comment_content
 263                         );
 264                 }
 265                 return $text;
 266         }
 267
 268         function unstrip( $text, &$state )
 269         {
 270                 # Must expand in reverse order, otherwise nested tags will be corrupted
 271                 $contentDict = end( $state );
 272                 for ( $contentDict = end( $state ); $contentDict !== false; $contentDict = prev( $state ) ) {
 273                         for ( $content = end( $contentDict ); $content !== false; $content = prev( $contentDict ) ) {
 274                                 $text = str_replace( key( $contentDict ), $content, $text );
 275                         }
 276                 }
 277
 278                 return $text;
 279         }
 280
 281         # Add an item to the strip state
 282         # Returns the unique tag which must be inserted into the stripped text
 283         # The tag will be replaced with the original text in unstrip()
 284
 285         function insertStripItem( $text, &$state )
 286         {
 287                 $rnd = UNIQ_PREFIX . '-item' . Parser::getRandomString();
 288                 if ( !$state ) {
 289                         $state = array(
 290                           'nowiki' => array(),
 291                           'hiero' => array(),
 292                           'math' => array(),
 293                           'pre' => array()
 294                         );
 295                 }
 296                 $state['item'][$rnd] = $text;
 297                 return $rnd;
 298         }
 299
 300         # This method generates the list of subcategories and pages for a category
 301         function categoryMagic ()
 302         {
 303                 global $wgLang , $wgUser ;
 304                 if ( !$this->mOptions->getUseCategoryMagic() ) return ; # Doesn't use categories at all
 305
 306                 $cns = Namespace::getCategory() ;
 307                 if ( $this->mTitle->getNamespace() != $cns ) return "" ; # This ain't a category page
 308
 309                 $r = "<br style=\"clear:both;\"/>\n";
 310
 311
 312                 $sk =& $wgUser->getSkin() ;
 313
 314                 $articles = array() ;
 315                 $children = array() ;
 316                 $data = array () ;
 317                 $id = $this->mTitle->getArticleID() ;
 318
 319                 # For existing categories
 320                 if( $id ) {
 321                         $sql = "SELECT DISTINCT cur_title,cur_namespace FROM cur,links WHERE l_to={$id} AND l_from=cur_id";
 322                         $res = wfQuery ( $sql, DB_READ ) ;
 323                         while ( $x = wfFetchObject ( $res ) ) $data[] = $x ;
 324                 } else {
 325                         # For non-existing categories
 326                         $t = wfStrencode( $this->mTitle->getPrefixedDBKey() );
 327                         $sql = "SELECT DISTINCT cur_title,cur_namespace FROM cur,brokenlinks WHERE bl_to='$t' AND bl_from=cur_id" ;
 328                         $res = wfQuery ( $sql, DB_READ ) ;
 329                         while ( $x = wfFetchObject ( $res ) ) $data[] = $x ;
 330                 }
 331
 332                 # For all pages that link to this category
 333                 foreach ( $data AS $x )
 334                 {
 335                         $t = $wgLang->getNsText ( $x->cur_namespace ) ;
 336                         if ( $t != "" ) $t .= ":" ;
 337                         $t .= $x->cur_title ;
 338
 339                         if ( $x->cur_namespace == $cns ) {
 340                                 array_push ( $children , $sk->makeLink ( $t ) ) ; # Subcategory
 341                         } else {
 342                                 array_push ( $articles , $sk->makeLink ( $t ) ) ; # Page in this category
 343                         }
 344                 }
 345                 wfFreeResult ( $res ) ;
 346
 347                 # Showing subcategories
 348                 if ( count ( $children ) > 0 )
 349                 {
 350                         asort ( $children ) ;
 351                         $r .= "<h2>".wfMsg("subcategories")."</h2>\n" ;
 352                         $r .= implode ( ", " , $children ) ;
 353                 }
 354
 355                 # Showing pages in this category
 356                 if ( count ( $articles ) > 0 )
 357                 {
 358                         $ti = $this->mTitle->getText() ;
 359                         asort ( $articles ) ;
 360                         $h =  wfMsg( "category_header", $ti );
 361                         $r .= "<h2>{$h}</h2>\n" ;
 362                         $r .= implode ( ", " , $articles ) ;
 363                 }
 364
 365
 366                 return $r ;
 367         }
 368
 369         function getHTMLattrs ()
 370         {
 371                 $htmlattrs = array( # Allowed attributes--no scripting, etc.
 372                                 "title", "align", "lang", "dir", "width", "height",
 373                                 "bgcolor", "clear", /* BR */ "noshade", /* HR */
 374                                 "cite", /* BLOCKQUOTE, Q */ "size", "face", "color",
 375                                 /* FONT */ "type", "start", "value", "compact",
 376                                 /* For various lists, mostly deprecated but safe */
 377                                 "summary", "width", "border", "frame", "rules",
 378                                 "cellspacing", "cellpadding", "valign", "char",
 379                                 "charoff", "colgroup", "col", "span", "abbr", "axis",
 380                                 "headers", "scope", "rowspan", "colspan", /* Tables */
 381                                 "id", "class", "name", "style" /* For CSS */
 382                                 );
 383                 return $htmlattrs ;
 384         }
 385
 386         function fixTagAttributes ( $t )
 387         {
 388                 if ( trim ( $t ) == "" ) return "" ; # Saves runtime ;-)
 389                 $htmlattrs = $this->getHTMLattrs() ;
 390
 391                 # Strip non-approved attributes from the tag
 392                 $t = preg_replace(
 393                         "/(\\w+)(\\s*=\\s*([^\\s\">]+|\"[^\">]*\"))?/e",
 394                         "(in_array(strtolower(\"\$1\"),\$htmlattrs)?(\"\$1\".((\"x\$3\" != \"x\")?\"=\$3\":'')):'')",
 395                         $t);
 396                 # Strip javascript "expression" from stylesheets. Brute force approach:
 397                 # If anythin offensive is found, all attributes of the HTML tag are dropped
 398
 399                 if( preg_match(
 400                         "/style\\s*=.*(expression|tps*:\/\/|url\\s*\().*/is",
 401                         wfMungeToUtf8( $t ) ) )
 402                 {
 403                         $t="";
 404                 }
 405
 406                 return trim ( $t ) ;
 407         }
 408
 409         /* interface with html tidy, used if $wgUseTidy = true */
 410         function tidy ( $text ) {
 411                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 412                 global $wgInputEncoding, $wgOutputEncoding;
 413                 $cleansource = '';
 414                 switch(strtoupper($wgOutputEncoding)) {
 415                         case 'ISO-8859-1':
 416                                 $wgTidyOpts .= ($wgInputEncoding == $wgOutputEncoding)? ' -latin1':' -raw';
 417                                 break;
 418                         case 'UTF-8':
 419                                 $wgTidyOpts .= ($wgInputEncoding == $wgOutputEncoding)? ' -utf8':' -raw';
 420                                 break;
 421                         default:
 422                                 $wgTidyOpts .= ' -raw';
 423                         }
 424
 425                 $text = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 426 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 427 '<head><title>test</title></head><body>'.$text.'</body></html>';
 428                 $descriptorspec = array(
 429                         0 => array("pipe", "r"),
 430                         1 => array("pipe", "w"),
 431                         2 => array("file", "/dev/null", "a")
 432                 );
 433                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts", $descriptorspec, $pipes);
 434                 if (is_resource($process)) {
 435                         fwrite($pipes[0], $text);
 436                         fclose($pipes[0]);
 437                         while (!feof($pipes[1])) {
 438                                 $cleansource .= fgets($pipes[1], 1024);
 439                         }
 440                         fclose($pipes[1]);
 441                         $return_value = proc_close($process);
 442                 }
 443                 if( $cleansource == '' && $text != '') {
 444                         return '<h2>'.wfMsg('seriousxhtmlerrors').'</h2><pre>'.htmlspecialchars($text).'</pre>';
 445                 } else {
 446                         return $cleansource;
 447                 }
 448         }
 449
 450         function doTableStuff ( $t )
 451         {
 452                 $t = explode ( "\n" , $t ) ;
 453                 $td = array () ; # Is currently a td tag open?
 454                         $ltd = array () ; # Was it TD or TH?
 455                         $tr = array () ; # Is currently a tr tag open?
 456                         $ltr = array () ; # tr attributes
 457                         foreach ( $t AS $k => $x )
 458                         {
 459                                 $x = trim ( $x ) ;
 460                                 $fc = substr ( $x , 0 , 1 ) ;
 461                                 if ( "{|" == substr ( $x , 0 , 2 ) )
 462                                 {
 463                                         $t[$k] = "\n<table " . $this->fixTagAttributes ( substr ( $x , 3 ) ) . ">" ;
 464                                         array_push ( $td , false ) ;
 465                                         array_push ( $ltd , "" ) ;
 466                                         array_push ( $tr , false ) ;
 467                                         array_push ( $ltr , "" ) ;
 468                                 }
 469                                 else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 470                                 else if ( "|}" == substr ( $x , 0 , 2 ) )
 471                                 {
 472                                         $z = "</table>\n" ;
 473                                         $l = array_pop ( $ltd ) ;
 474                                         if ( array_pop ( $tr ) ) $z = "</tr>" . $z ;
 475                                         if ( array_pop ( $td ) ) $z = "</{$l}>" . $z ;
 476                                         array_pop ( $ltr ) ;
 477                                         $t[$k] = $z ;
 478                                 }
 479                                 /*      else if ( "|_" == substr ( $x , 0 , 2 ) ) # Caption
 480                                                 {
 481                                                 $z = trim ( substr ( $x , 2 ) ) ;
 482                                                 $t[$k] = "<caption>{$z}</caption>\n" ;
 483                                                 }*/
 484                                 else if ( "|-" == substr ( $x , 0 , 2 ) ) # Allows for |---------------
 485                                 {
 486                                         $x = substr ( $x , 1 ) ;
 487                                         while ( $x != "" && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 488                                         $z = "" ;
 489                                         $l = array_pop ( $ltd ) ;
 490                                         if ( array_pop ( $tr ) ) $z = "</tr>" . $z ;
 491                                         if ( array_pop ( $td ) ) $z = "</{$l}>" . $z ;
 492                                         array_pop ( $ltr ) ;
 493                                         $t[$k] = $z ;
 494                                         array_push ( $tr , false ) ;
 495                                         array_push ( $td , false ) ;
 496                                         array_push ( $ltd , "" ) ;
 497                                         array_push ( $ltr , $this->fixTagAttributes ( $x ) ) ;
 498                                 }
 499                                 else if ( "|" == $fc || "!" == $fc || "|+" == substr ( $x , 0 , 2 ) ) # Caption
 500                                 {
 501                                         if ( "|+" == substr ( $x , 0 , 2 ) )
 502                                         {
 503                                                 $fc = "+" ;
 504                                                 $x = substr ( $x , 1 ) ;
 505                                         }
 506                                         $after = substr ( $x , 1 ) ;
 507                                         if ( $fc == "!" ) $after = str_replace ( "!!" , "||" , $after ) ;
 508                                         $after = explode ( "||" , $after ) ;
 509                                         $t[$k] = "" ;
 510                                         foreach ( $after AS $theline )
 511                                         {
 512                                                 $z = "" ;
 513                                                 if ( $fc != "+" )
 514                                                 {
 515                                                         $tra = array_pop ( $ltr ) ;
 516                                                         if ( !array_pop ( $tr ) ) $z = "<tr {$tra}>\n" ;
 517                                                         array_push ( $tr , true ) ;
 518                                                         array_push ( $ltr , "" ) ;
 519                                                 }
 520
 521                                                 $l = array_pop ( $ltd ) ;
 522                                                 if ( array_pop ( $td ) ) $z = "</{$l}>" . $z ;
 523                                                 if ( $fc == "|" ) $l = "td" ;
 524                                                 else if ( $fc == "!" ) $l = "th" ;
 525                                                 else if ( $fc == "+" ) $l = "caption" ;
 526                                                 else $l = "" ;
 527                                                 array_push ( $ltd , $l ) ;
 528                                                 $y = explode ( "|" , $theline , 2 ) ;
 529                                                 if ( count ( $y ) == 1 ) $y = "{$z}<{$l}>{$y[0]}" ;
 530                                                 else $y = $y = "{$z}<{$l} ".$this->fixTagAttributes($y[0]).">{$y[1]}" ;
 531                                                 $t[$k] .= $y ;
 532                                                 array_push ( $td , true ) ;
 533                                         }
 534                                 }
 535                         }
 536
 537                 # Closing open td, tr && table
 538                 while ( count ( $td ) > 0 )
 539                 {
 540                         if ( array_pop ( $td ) ) $t[] = "</td>" ;
 541                         if ( array_pop ( $tr ) ) $t[] = "</tr>" ;
 542                         $t[] = "</table>" ;
 543                 }
 544
 545                 $t = implode ( "\n" , $t ) ;
 546                 #               $t = $this->removeHTMLtags( $t );
 547                 return $t ;
 548         }
 549
 550         function internalParse( $text, $linestart, $args = array(), $isMain=true )
 551         {
 552                 $fname = "Parser::internalParse";
 553                 wfProfileIn( $fname );
 554
 555                 $text = $this->removeHTMLtags( $text );
 556                 $text = $this->replaceVariables( $text, $args );
 557
 558                 # $text = preg_replace( "/(^|\n)-----*/", "\\1<hr>", $text );
 559
 560                 $text = $this->doHeadings( $text );
 561                 if($this->mOptions->getUseDynamicDates()) {
 562                         global $wgDateFormatter;
 563                         $text = $wgDateFormatter->reformat( $this->mOptions->getDateFormat(), $text );
 564                 }
 565                 $text = $this->replaceExternalLinks( $text );
 566                 $text = $this->doTokenizedParser ( $text );
 567                 $text = $this->doTableStuff ( $text ) ;
 568                 $text = $this->formatHeadings( $text, $isMain );
 569                 $sk =& $this->mOptions->getSkin();
 570                 $text = $sk->transformContent( $text );
 571
 572                 if ( !isset ( $this->categoryMagicDone ) ) {
 573                    $text .= $this->categoryMagic () ;
 574                    $this->categoryMagicDone = true ;
 575                    }
 576
 577                 wfProfileOut( $fname );
 578                 return $text;
 579         }
 580
 581
 582         /* private */ function doHeadings( $text )
 583         {
 584                 for ( $i = 6; $i >= 1; --$i ) {
 585                         $h = substr( "======", 0, $i );
 586                         $text = preg_replace( "/^{$h}(.+){$h}(\\s|$)/m",
 587                           "<h{$i}>\\1</h{$i}>\\2", $text );
 588                 }
 589                 return $text;
 590         }
 591
 592         # Note: we have to do external links before the internal ones,
 593         # and otherwise take great care in the order of things here, so
 594         # that we don't end up interpreting some URLs twice.
 595
 596         /* private */ function replaceExternalLinks( $text )
 597         {
 598                 $fname = "Parser::replaceExternalLinks";
 599                 wfProfileIn( $fname );
 600                 $text = $this->subReplaceExternalLinks( $text, "http", true );
 601                 $text = $this->subReplaceExternalLinks( $text, "https", true );
 602                 $text = $this->subReplaceExternalLinks( $text, "ftp", false );
 603                 $text = $this->subReplaceExternalLinks( $text, "irc", false );
 604                 $text = $this->subReplaceExternalLinks( $text, "gopher", false );
 605                 $text = $this->subReplaceExternalLinks( $text, "news", false );
 606                 $text = $this->subReplaceExternalLinks( $text, "mailto", false );
 607                 wfProfileOut( $fname );
 608                 return $text;
 609         }
 610
 611         /* private */ function subReplaceExternalLinks( $s, $protocol, $autonumber )
 612         {
 613                 $unique = "4jzAfzB8hNvf4sqyO9Edd8pSmk9rE2in0Tgw3";
 614                 $uc = "A-Za-z0-9_\\/~%\\-+&*#?!=()@\\x80-\\xFF";
 615
 616                 # this is  the list of separators that should be ignored if they
 617                 # are the last character of an URL but that should be included
 618                 # if they occur within the URL, e.g. "go to www.foo.com, where .."
 619                 # in this case, the last comma should not become part of the URL,
 620                 # but in "www.foo.com/123,2342,32.htm" it should.
 621                 $sep = ",;\.:";
 622                 $fnc = "A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF";
 623                 $images = "gif|png|jpg|jpeg";
 624
 625                 # PLEASE NOTE: The curly braces { } are not part of the regex,
 626                 # they are interpreted as part of the string (used to tell PHP
 627                 # that the content of the string should be inserted there).
 628                 $e1 = "/(^|[^\\[])({$protocol}:)([{$uc}{$sep}]+)\\/([{$fnc}]+)\\." .
 629                   "((?i){$images})([^{$uc}]|$)/";
 630
 631                 $e2 = "/(^|[^\\[])({$protocol}:)(([".$uc."]|[".$sep."][".$uc."])+)([^". $uc . $sep. "]|[".$sep."]|$)/";
 632                 $sk =& $this->mOptions->getSkin();
 633
 634                 if ( $autonumber and $this->mOptions->getAllowExternalImages() ) { # Use img tags only for HTTP urls
 635                         $s = preg_replace( $e1, "\\1" . $sk->makeImage( "{$unique}:\\3" .
 636                           "/\\4.\\5", "\\4.\\5" ) . "\\6", $s );
 637                 }
 638                 $s = preg_replace( $e2, "\\1" . "<a href=\"{$unique}:\\3\"" .
 639                   $sk->getExternalLinkAttributes( "{$unique}:\\3", wfEscapeHTML(
 640                   "{$unique}:\\3" ) ) . ">" . wfEscapeHTML( "{$unique}:\\3" ) .
 641                   "</a>\\5", $s );
 642                 $s = str_replace( $unique, $protocol, $s );
 643
 644                 $a = explode( "[{$protocol}:", " " . $s );
 645                 $s = array_shift( $a );
 646                 $s = substr( $s, 1 );
 647
 648                 $e1 = "/^([{$uc}"."{$sep}]+)](.*)\$/sD";
 649                 $e2 = "/^([{$uc}"."{$sep}]+)\\s+([^\\]]+)](.*)\$/sD";
 650
 651                 foreach ( $a as $line ) {
 652                         if ( preg_match( $e1, $line, $m ) ) {
 653                                 $link = "{$protocol}:{$m[1]}";
 654                                 $trail = $m[2];
 655                                 if ( $autonumber ) { $text = "[" . ++$this->mAutonumber . "]"; }
 656                                 else { $text = wfEscapeHTML( $link ); }
 657                         } else if ( preg_match( $e2, $line, $m ) ) {
 658                                 $link = "{$protocol}:{$m[1]}";
 659                                 $text = $m[2];
 660                                 $trail = $m[3];
 661                         } else {
 662                                 $s .= "[{$protocol}:" . $line;
 663                                 continue;
 664                         }
 665                         if( $link == $text || preg_match( "!$protocol://" . preg_quote( $text, "/" ) . "/?$!", $link ) ) {
 666                                 $paren = "";
 667                         } else {
 668                                 # Expand the URL for printable version
 669                                 $paren = "<span class='urlexpansion'> (<i>" . htmlspecialchars ( $link ) . "</i>)</span>";
 670                         }
 671                         $la = $sk->getExternalLinkAttributes( $link, $text );
 672                         $s .= "<a href='{$link}'{$la}>{$text}</a>{$paren}{$trail}";
 673
 674                 }
 675                 return $s;
 676         }
 677
 678         /* private */ function handle3Quotes( &$state, $token )
 679         {
 680                 if ( $state["strong"] !== false ) {
 681                         if ( $state["em"] !== false && $state["em"] > $state["strong"] )
 682                         {
 683                                 # ''' lala ''lala '''
 684                                 $s = "</em></strong><em>";
 685                         } else {
 686                                 $s = "</strong>";
 687                         }
 688                         $state["strong"] = FALSE;
 689                 } else {
 690                         $s = "<strong>";
 691                         $state["strong"] = $token["pos"];
 692                 }
 693                 return $s;
 694         }
 695
 696         /* private */ function handle2Quotes( &$state, $token )
 697         {
 698                 if ( $state["em"] !== false ) {
 699                         if ( $state["strong"] !== false && $state["strong"] > $state["em"] )
 700                         {
 701                                 # ''lala'''lala'' ....'''
 702                                 $s = "</strong></em><strong>";
 703                         } else {
 704                                 $s = "</em>";
 705                         }
 706                         $state["em"] = FALSE;
 707                 } else {
 708                         $s = "<em>";
 709                         $state["em"] = $token["pos"];
 710
 711                 }
 712                 return $s;
 713         }
 714
 715         /* private */ function handle5Quotes( &$state, $token )
 716         {
 717                 $s = "";
 718                 if ( $state["em"] !== false && $state["strong"] !== false ) {
 719                         if ( $state["em"] < $state["strong"] ) {
 720                                 $s .= "</strong></em>";
 721                         } else {
 722                                 $s .= "</em></strong>";
 723                         }
 724                         $state["strong"] = $state["em"] = FALSE;
 725                 } elseif ( $state["em"] !== false ) {
 726                         $s .= "</em><strong>";
 727                         $state["em"] = FALSE;
 728                         $state["strong"] = $token["pos"];
 729                 } elseif ( $state["strong"] !== false ) {
 730                         $s .= "</strong><em>";
 731                         $state["strong"] = FALSE;
 732                         $state["em"] = $token["pos"];
 733                 } else { # not $em and not $strong
 734                         $s .= "<strong><em>";
 735                         $state["strong"] = $state["em"] = $token["pos"];
 736                 }
 737                 return $s;
 738         }
 739
 740         /* private */ function doTokenizedParser( $str )
 741         {
 742                 global $wgLang; # for language specific parser hook
 743                 global $wgUploadDirectory, $wgUseTimeline;
 744
 745                 $tokenizer=Tokenizer::newFromString( $str );
 746                 $tokenStack = array();
 747
 748                 $s="";
 749                 $state["em"]      = FALSE;
 750                 $state["strong"]  = FALSE;
 751                 $tagIsOpen = FALSE;
 752                 $threeopen = false;
 753
 754                 # The tokenizer splits the text into tokens and returns them one by one.
 755                 # Every call to the tokenizer returns a new token.
 756                 while ( $token = $tokenizer->nextToken() )
 757                 {
 758                         switch ( $token["type"] )
 759                         {
 760                                 case "text":
 761                                         # simple text with no further markup
 762                                         $txt = $token["text"];
 763                                         break;
 764                                 case "blank":
 765                                         # Text that contains blanks that have to be converted to
 766                                         # non-breakable spaces for French.
 767                                         # U+202F NARROW NO-BREAK SPACE might be a better choice, but
 768                                         # browser support for Unicode spacing is poor.
 769                                         $txt = str_replace( " ", "&nbsp;", $token["text"] );
 770                                         break;
 771                                 case "[[[":
 772                                         # remember the tag opened with 3 [
 773                                         $threeopen = true;
 774                                 case "[[":
 775                                         # link opening tag.
 776                                         # FIXME : Treat orphaned open tags (stack not empty when text is over)
 777                                         $tagIsOpen = TRUE;
 778                                         array_push( $tokenStack, $token );
 779                                         $txt="";
 780                                         break;
 781
 782                                 case "]]]":
 783                                 case "]]":
 784                                         # link close tag.
 785                                         # get text from stack, glue it together, and call the code to handle a
 786                                         # link
 787
 788                                         if ( count( $tokenStack ) == 0 )
 789                                         {
 790                                                 # stack empty. Found a ]] without an opening [[
 791                                                 $txt = "]]";
 792                                         } else {
 793                                                 $linkText = "";
 794                                                 $lastToken = array_pop( $tokenStack );
 795                                                 while ( !(($lastToken["type"] == "[[[") or ($lastToken["type"] == "[[")) )
 796                                                 {
 797                                                         if( !empty( $lastToken["text"] ) ) {
 798                                                                 $linkText = $lastToken["text"] . $linkText;
 799                                                         }
 800                                                         $lastToken = array_pop( $tokenStack );
 801                                                 }
 802
 803                                                 $txt = $linkText ."]]";
 804
 805                                                 if( isset( $lastToken["text"] ) ) {
 806                                                         $prefix = $lastToken["text"];
 807                                                 } else {
 808                                                         $prefix = "";
 809                                                 }
 810                                                 $nextToken = $tokenizer->previewToken();
 811                                                 if ( $nextToken["type"] == "text" )
 812                                                 {
 813                                                         # Preview just looks at it. Now we have to fetch it.
 814                                                         $nextToken = $tokenizer->nextToken();
 815                                                         $txt .= $nextToken["text"];
 816                                                 }
 817                                                 $txt = $this->handleInternalLink( $this->unstrip($txt,$this->mStripState), $prefix );
 818
 819                                                 # did the tag start with 3 [ ?
 820                                                 if($threeopen) {
 821                                                         # show the first as text
 822                                                         $txt = "[".$txt;
 823                                                         $threeopen=false;
 824                                                 }
 825
 826                                         }
 827                                         $tagIsOpen = (count( $tokenStack ) != 0);
 828                                         break;
 829                                 case "----":
 830                                         $txt = "\n<hr />\n";
 831                                         break;
 832                                 case "'''":
 833                                         # This and the three next ones handle quotes
 834                                         $txt = $this->handle3Quotes( $state, $token );
 835                                         break;
 836                                 case "''":
 837                                         $txt = $this->handle2Quotes( $state, $token );
 838                                         break;
 839                                 case "'''''":
 840                                         $txt = $this->handle5Quotes( $state, $token );
 841                                         break;
 842                                 case "":
 843                                         # empty token
 844                                         $txt="";
 845                                         break;
 846                                 case "RFC ":
 847                                         if ( $tagIsOpen ) {
 848                                                 $txt = "RFC ";
 849                                         } else {
 850                                                 $txt = $this->doMagicRFC( $tokenizer );
 851                                         }
 852                                         break;
 853                                 case "ISBN ":
 854                                         if ( $tagIsOpen ) {
 855                                                 $txt = "ISBN ";
 856                                         } else {
 857                                                 $txt = $this->doMagicISBN( $tokenizer );
 858                                         }
 859                                         break;
 860                                 case "<timeline>":
 861                                         if ( $wgUseTimeline &&
 862                                              "" != ( $timelinesrc = $tokenizer->readAllUntil("&lt;/timeline&gt;") ) )
 863                                         {
 864                                                 $txt = renderTimeline( $timelinesrc );
 865                                         } else {
 866                                                 $txt=$token["text"];
 867                                         }
 868                                         break;
 869                                 default:
 870                                         # Call language specific Hook.
 871                                         $txt = $wgLang->processToken( $token, $tokenStack );
 872                                         if ( NULL == $txt ) {
 873                                                 # An unkown token. Highlight.
 874                                                 $txt = "<font color=\"#FF0000\"><b>".$token["type"]."</b></font>";
 875                                                 $txt .= "<font color=\"#FFFF00\"><b>".$token["text"]."</b></font>";
 876                                         }
 877                                         break;
 878                         }
 879                         # If we're parsing the interior of a link, don't append the interior to $s,
 880                         # but push it to the stack so it can be processed when a ]] token is found.
 881                         if ( $tagIsOpen  && $txt != "" ) {
 882                                 $token["type"] = "text";
 883                                 $token["text"] = $txt;
 884                                 array_push( $tokenStack, $token );
 885                         } else {
 886                                 $s .= $txt;
 887                         }
 888                 } #end while
 889                 if ( count( $tokenStack ) != 0 )
 890                 {
 891                         # still objects on stack. opened [[ tag without closing ]] tag.
 892                         $txt = "";
 893                         while ( $lastToken = array_pop( $tokenStack ) )
 894                         {
 895                                 if ( $lastToken["type"] == "text" )
 896                                 {
 897                                         $txt = $lastToken["text"] . $txt;
 898                                 } else {
 899                                         $txt = $lastToken["type"] . $txt;
 900                                 }
 901                         }
 902                         $s .= $txt;
 903                 }
 904                 return $s;
 905         }
 906
 907         /* private */ function handleInternalLink( $line, $prefix )
 908         {
 909                 global $wgLang, $wgLinkCache;
 910                 global $wgNamespacesWithSubpages, $wgLanguageCode;
 911                 static $fname = "Parser::handleInternalLink" ;
 912                 wfProfileIn( $fname );
 913
 914                 wfProfileIn( "$fname-setup" );
 915                 static $tc = FALSE;
 916                 if ( !$tc ) { $tc = Title::legalChars() . "#"; }
 917                 $sk =& $this->mOptions->getSkin();
 918
 919                 # Match a link having the form [[namespace:link|alternate]]trail
 920                 static $e1 = FALSE;
 921                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|([^]]+))?]](.*)\$/sD"; }
 922                 # Match the end of a line for a word that's not followed by whitespace,
 923                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
 924                 #$e2 = "/^(.*)\\b(\\w+)\$/suD";
 925                 #$e2 = "/^(.*\\s)(\\S+)\$/suD";
 926                 static $e2 = '/^(.*\s)([a-zA-Z\x80-\xff]+)$/sD';
 927
 928
 929                 # Special and Media are pseudo-namespaces; no pages actually exist in them
 930                 static $image = FALSE;
 931                 static $special = FALSE;
 932                 static $media = FALSE;
 933                 static $category = FALSE;
 934                 if ( !$image ) { $image = Namespace::getImage(); }
 935                 if ( !$special ) { $special = Namespace::getSpecial(); }
 936                 if ( !$media ) { $media = Namespace::getMedia(); }
 937                 if ( !$category ) { $category = Namespace::getCategory(); }
 938
 939                 $nottalk = !Namespace::isTalk( $this->mTitle->getNamespace() );
 940
 941                 wfProfileOut( "$fname-setup" );
 942                 $s = "";
 943
 944                 if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
 945                         $text = $m[2];
 946                         $trail = $m[3];
 947                 } else { # Invalid form; output directly
 948                         $s .= $prefix . "[[" . $line ;
 949                         return $s;
 950                 }
 951
 952                 /* Valid link forms:
 953                 Foobar -- normal
 954                 :Foobar -- override special treatment of prefix (images, language links)
 955                 /Foobar -- convert to CurrentPage/Foobar
 956                 /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
 957                 */
 958                 $c = substr($m[1],0,1);
 959                 $noforce = ($c != ":");
 960                 if( $c == "/" ) { # subpage
 961                         if(substr($m[1],-1,1)=="/") {                 # / at end means we don't want the slash to be shown
 962                                 $m[1]=substr($m[1],1,strlen($m[1])-2);
 963                                 $noslash=$m[1];
 964                         } else {
 965                                 $noslash=substr($m[1],1);
 966                         }
 967                         if($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]) { # subpages allowed here
 968                                 $link = $this->mTitle->getPrefixedText(). "/" . trim($noslash);
 969                                 if( "" == $text ) {
 970                                         $text= $m[1];
 971                                 } # this might be changed for ugliness reasons
 972                         } else {
 973                                 $link = $noslash; # no subpage allowed, use standard link
 974                         }
 975                 } elseif( $noforce ) { # no subpage
 976                         $link = $m[1];
 977                 } else {
 978                         $link = substr( $m[1], 1 );
 979                 }
 980                 if( "" == $text )
 981                         $text = $link;
 982
 983                 $nt = Title::newFromText( $link );
 984                 if( !$nt ) {
 985                         $s .= $prefix . "[[" . $line;
 986                         return $s;
 987                 }
 988                 $ns = $nt->getNamespace();
 989                 $iw = $nt->getInterWiki();
 990                 if( $noforce ) {
 991                         if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgLang->getLanguageName( $iw ) ) {
 992                                 array_push( $this->mOutput->mLanguageLinks, $nt->getPrefixedText() );
 993                                 $s .= $prefix . $trail ;
 994                                 return (trim($s) == '')? '': $s;
 995                         }
 996                         if( $ns == $image ) {
 997                                 $s .= $prefix . $sk->makeImageLinkObj( $nt, $text ) . $trail;
 998                                 $wgLinkCache->addImageLinkObj( $nt );
 999                                 return $s;
1000                         }
1001                         if ( $ns == $category ) {
1002                                 $t = $nt->getText() ;
1003                                 $nnt = Title::newFromText ( Namespace::getCanonicalName($category).":".$t ) ;
1004                                 $t = $sk->makeLinkObj( $nnt, $t, "", "" , $prefix );
1005                                 $this->mOutput->mCategoryLinks[] = $t ;
1006                                 $s .= $prefix . $trail ;
1007                                 return $s ;
1008                         }
1009                 }
1010                 if( ( $nt->getPrefixedText() == $this->mTitle->getPrefixedText() ) &&
1011                     ( strpos( $link, "#" ) == FALSE ) ) {
1012                         # Self-links are handled specially; generally de-link and change to bold.
1013                         $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, "", $trail );
1014                         return $s;
1015                 }
1016
1017                 if( $ns == $media ) {
1018                         $s .= $prefix . $sk->makeMediaLinkObj( $nt, $text ) . $trail;
1019                         $wgLinkCache->addImageLinkObj( $nt );
1020                         return $s;
1021                 } elseif( $ns == $special ) {
1022                         $s .= $prefix . $sk->makeKnownLinkObj( $nt, $text, "", $trail );
1023                         return $s;
1024                 }
1025                 $s .= $sk->makeLinkObj( $nt, $text, "", $trail , $prefix );
1026
1027                 wfProfileOut( $fname );
1028                 return $s;
1029         }
1030
1031         # Some functions here used by doBlockLevels()
1032         #
1033         /* private */ function closeParagraph()
1034         {
1035                 $result = "";
1036                 if ( '' != $this->mLastSection ) {
1037                         $result = "</" . $this->mLastSection  . ">\n";
1038                 }
1039                 $this->mInPre = false;
1040                 $this->mLastSection = "";
1041                 return $result;
1042         }
1043         # getCommon() returns the length of the longest common substring
1044         # of both arguments, starting at the beginning of both.
1045         #
1046         /* private */ function getCommon( $st1, $st2 )
1047         {
1048                 $fl = strlen( $st1 );
1049                 $shorter = strlen( $st2 );
1050                 if ( $fl < $shorter ) { $shorter = $fl; }
1051
1052                 for ( $i = 0; $i < $shorter; ++$i ) {
1053                         if ( $st1{$i} != $st2{$i} ) { break; }
1054                 }
1055                 return $i;
1056         }
1057         # These next three functions open, continue, and close the list
1058         # element appropriate to the prefix character passed into them.
1059         #
1060         /* private */ function openList( $char )
1061     {
1062                 $result = $this->closeParagraph();
1063
1064                 if ( "*" == $char ) { $result .= "<ul><li>"; }
1065                 else if ( "#" == $char ) { $result .= "<ol><li>"; }
1066                 else if ( ":" == $char ) { $result .= "<dl><dd>"; }
1067                 else if ( ";" == $char ) {
1068                         $result .= "<dl><dt>";
1069                         $this->mDTopen = true;
1070                 }
1071                 else { $result = "<!-- ERR 1 -->"; }
1072
1073                 return $result;
1074         }
1075
1076         /* private */ function nextItem( $char )
1077         {
1078                 if ( "*" == $char || "#" == $char ) { return "</li><li>"; }
1079                 else if ( ":" == $char || ";" == $char ) {
1080                         $close = "</dd>";
1081                         if ( $this->mDTopen ) { $close = "</dt>"; }
1082                         if ( ";" == $char ) {
1083                                 $this->mDTopen = true;
1084                                 return $close . "<dt>";
1085                         } else {
1086                                 $this->mDTopen = false;
1087                                 return $close . "<dd>";
1088                         }
1089                 }
1090                 return "<!-- ERR 2 -->";
1091         }
1092
1093         /* private */function closeList( $char )
1094         {
1095                 if ( "*" == $char ) { $text = "</li></ul>"; }
1096                 else if ( "#" == $char ) { $text = "</li></ol>"; }
1097                 else if ( ":" == $char ) {
1098                         if ( $this->mDTopen ) {
1099                                 $this->mDTopen = false;
1100                                 $text = "</dt></dl>";
1101                         } else {
1102                                 $text = "</dd></dl>";
1103                         }
1104                 }
1105                 else {  return "<!-- ERR 3 -->"; }
1106                 return $text."\n";
1107         }
1108
1109         /* private */ function doBlockLevels( $text, $linestart ) {
1110                 $fname = "Parser::doBlockLevels";
1111                 wfProfileIn( $fname );
1112
1113                 # Parsing through the text line by line.  The main thing
1114                 # happening here is handling of block-level elements p, pre,
1115                 # and making lists from lines starting with * # : etc.
1116                 #
1117                 $textLines = explode( "\n", $text );
1118
1119                 $lastPrefix = $output = $lastLine = '';
1120                 $this->mDTopen = $inBlockElem = false;
1121                 $prefixLength = 0;
1122                 $paragraphStack = false;
1123
1124                 if ( !$linestart ) {
1125                         $output .= array_shift( $textLines );
1126                 }
1127                 foreach ( $textLines as $oLine ) {
1128                         $lastPrefixLength = strlen( $lastPrefix );
1129                         $preCloseMatch = preg_match("/<\\/pre/i", $oLine );
1130                         $preOpenMatch = preg_match("/<pre/i", $oLine );
1131                         if (!$this->mInPre) {
1132                                 $this->mInPre = !empty($preOpenMatch);
1133                         }
1134                         if ( !$this->mInPre ) {
1135                                 # Multiple prefixes may abut each other for nested lists.
1136                                 $prefixLength = strspn( $oLine, "*#:;" );
1137                                 $pref = substr( $oLine, 0, $prefixLength );
1138
1139                                 # eh?
1140                                 $pref2 = str_replace( ";", ":", $pref );
1141                                 $t = substr( $oLine, $prefixLength );
1142                         } else {
1143                                 # Don't interpret any other prefixes in preformatted text
1144                                 $prefixLength = 0;
1145                                 $pref = $pref2 = '';
1146                                 $t = $oLine;
1147                         }
1148
1149                         # List generation
1150                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
1151                                 # Same as the last item, so no need to deal with nesting or opening stuff
1152                                 $output .= $this->nextItem( substr( $pref, -1 ) );
1153                                 $paragraphStack = false;
1154
1155                                 if ( ";" == substr( $pref, -1 ) ) {
1156                                         # The one nasty exception: definition lists work like this:
1157                                         # ; title : definition text
1158                                         # So we check for : in the remainder text to split up the
1159                                         # title and definition, without b0rking links.
1160                                         # FIXME: This is not foolproof. Something better in Tokenizer might help.
1161                                         if( preg_match( '/^(.*?(?:\s|&nbsp;)):(.*)$/', $t, $match ) ) {
1162                                                 $term = $match[1];
1163                                                 $output .= $term . $this->nextItem( ":" );
1164                                                 $t = $match[2];
1165                                         }
1166                                 }
1167                         } elseif( $prefixLength || $lastPrefixLength ) {
1168                                 # Either open or close a level...
1169                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
1170                                 $paragraphStack = false;
1171
1172                                 while( $commonPrefixLength < $lastPrefixLength ) {
1173                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
1174                                         --$lastPrefixLength;
1175                                 }
1176                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
1177                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
1178                                 }
1179                                 while ( $prefixLength > $commonPrefixLength ) {
1180                                         $char = substr( $pref, $commonPrefixLength, 1 );
1181                                         $output .= $this->openList( $char );
1182
1183                                         if ( ";" == $char ) {
1184                                                 # FIXME: This is dupe of code above
1185                                                 if( preg_match( '/^(.*?(?:\s|&nbsp;)):(.*)$/', $t, $match ) ) {
1186                                                         $term = $match[1];
1187                                                         $output .= $term . $this->nextItem( ":" );
1188                                                         $t = $match[2];
1189                                                 }
1190                                         }
1191                                         ++$commonPrefixLength;
1192                                 }
1193                                 $lastPrefix = $pref2;
1194                         }
1195                         if( 0 == $prefixLength ) {
1196                                 # No prefix (not in list)--go to paragraph mode
1197                                 $uniq_prefix = UNIQ_PREFIX;
1198                                 // XXX: use a stack for nestable elements like span, table and div
1199                                 $openmatch = preg_match("/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<div|<pre|<tr|<td|<p|<ul|<li)/i", $t );
1200                                 $closematch = preg_match(
1201                                         "/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|".
1202                                         "<\\/div|<hr|<\\/td|<\\/pre|<\\/p|".$uniq_prefix."-pre|<\\/li|<\\/ul)/i", $t );
1203                                 if ( $openmatch or $closematch ) {
1204                                         $paragraphStack = false;
1205                                         $output .= $this->closeParagraph();
1206                                         if($preOpenMatch and !$preCloseMatch) {
1207                                                 $this->mInPre = true;
1208                                         }
1209                                         if ( $closematch  ) {
1210                                                 $inBlockElem = false;
1211                                         } else {
1212                                                 $inBlockElem = true;
1213                                         }
1214                                 } else if ( !$inBlockElem ) {
1215                                         if ( " " == $t{0} ) {
1216                                                 // pre
1217                                                 if ($this->mLastSection != 'pre') {
1218                                                         $paragraphStack = false;
1219                                                         $output .= $this->closeParagraph().'<pre>';
1220                                                         $this->mLastSection = 'pre';
1221                                                 }
1222                                         } else {
1223                                                 // paragraph
1224                                                 if ( '' == trim($t) ) {
1225                                                         if ( $paragraphStack ) {
1226                                                                 $output .= $paragraphStack.'<br/>';
1227                                                                 $paragraphStack = false;
1228                                                                 $this->mLastSection = 'p';
1229                                                         } else {
1230                                                                 if ($this->mLastSection != 'p' ) {
1231                                                                         $output .= $this->closeParagraph();
1232                                                                         $this->mLastSection = '';
1233                                                                         $paragraphStack = "<p>";
1234                                                                 } else {
1235                                                                         $paragraphStack = '</p><p>';
1236                                                                 }
1237                                                         }
1238                                                 } else {
1239                                                         if ( $paragraphStack ) {
1240                                                                 $output .= $paragraphStack;
1241                                                                 $paragraphStack = false;
1242                                                                 $this->mLastSection = 'p';
1243                                                         } else if ($this->mLastSection != 'p') {
1244                                                                 $output .= $this->closeParagraph().'<p>';
1245                                                                 $this->mLastSection = 'p';
1246                                                         }
1247                                                 }
1248                                         }
1249                                 }
1250                         }
1251                         if ($paragraphStack === false) {
1252                                 $output .= $t."\n";
1253                         }
1254                 }
1255                 while ( $prefixLength ) {
1256                         $output .= $this->closeList( $pref2{$prefixLength-1} );
1257                         --$prefixLength;
1258                 }
1259                 if ( "" != $this->mLastSection ) {
1260                         $output .= "</" . $this->mLastSection . ">";
1261                         $this->mLastSection = "";
1262                 }
1263
1264                 wfProfileOut( $fname );
1265                 return $output;
1266         }
1267
1268         function getVariableValue( $index ) {
1269                 global $wgLang, $wgSitename, $wgServer;
1270
1271                 switch ( $index ) {
1272                         case MAG_CURRENTMONTH:
1273                                 return date( "m" );
1274                         case MAG_CURRENTMONTHNAME:
1275                                 return $wgLang->getMonthName( date("n") );
1276                         case MAG_CURRENTMONTHNAMEGEN:
1277                                 return $wgLang->getMonthNameGen( date("n") );
1278                         case MAG_CURRENTDAY:
1279                                 return date("j");
1280                         case MAG_PAGENAME:
1281                                 return $this->mTitle->getText();
1282                         case MAG_NAMESPACE:
1283                                 # return Namespace::getCanonicalName($this->mTitle->getNamespace());
1284                                 return $wgLang->getNsText($this->mTitle->getNamespace()); // Patch  by Dori
1285                         case MAG_CURRENTDAYNAME:
1286                                 return $wgLang->getWeekdayName( date("w")+1 );
1287                         case MAG_CURRENTYEAR:
1288                                 return date( "Y" );
1289                         case MAG_CURRENTTIME:
1290                                 return $wgLang->time( wfTimestampNow(), false );
1291                         case MAG_NUMBEROFARTICLES:
1292                                 return wfNumberOfArticles();
1293                         case MAG_SITENAME:
1294                                 return $wgSitename;
1295                         case MAG_SERVER:
1296                                 return $wgServer;
1297                         default:
1298                                 return NULL;
1299                 }
1300         }
1301
1302         function initialiseVariables()
1303         {
1304                 global $wgVariableIDs;
1305                 $this->mVariables = array();
1306                 foreach ( $wgVariableIDs as $id ) {
1307                         $mw =& MagicWord::get( $id );
1308                         $mw->addToArray( $this->mVariables, $this->getVariableValue( $id ) );
1309                 }
1310         }
1311
1312         /* private */ function replaceVariables( $text, $args = array() )
1313         {
1314                 global $wgLang, $wgScript, $wgArticlePath;
1315
1316                 $fname = "Parser::replaceVariables";
1317                 wfProfileIn( $fname );
1318
1319                 $bail = false;
1320                 if ( !$this->mVariables ) {
1321                         $this->initialiseVariables();
1322                 }
1323                 $titleChars = Title::legalChars();
1324                 $regex = "/(\\n?){{([$titleChars]*?)(\\|.*?|)}}/s";
1325
1326                 # This function is called recursively. To keep track of arguments we need a stack:
1327                 array_push( $this->mArgStack, $args );
1328
1329                 # PHP global rebinding syntax is a bit weird, need to use the GLOBALS array
1330                 $GLOBALS['wgCurParser'] =& $this;
1331                 $text = preg_replace_callback( $regex, "wfBraceSubstitution", $text );
1332
1333                 array_pop( $this->mArgStack );
1334
1335                 return $text;
1336         }
1337
1338         function braceSubstitution( $matches )
1339         {
1340                 global $wgLinkCache, $wgLang;
1341                 $fname = "Parser::braceSubstitution";
1342                 $found = false;
1343                 $nowiki = false;
1344                 $title = NULL;
1345
1346                 # $newline is an optional newline character before the braces
1347                 # $part1 is the bit before the first |, and must contain only title characters
1348                 # $args is a list of arguments, starting from index 0, not including $part1
1349
1350                 $newline = $matches[1];
1351                 $part1 = $matches[2];
1352                 # If the third subpattern matched anything, it will start with |
1353                 if ( $matches[3] !== "" ) {
1354                         $args = explode( "|", substr( $matches[3], 1 ) );
1355                 } else {
1356                         $args = array();
1357                 }
1358                 $argc = count( $args );
1359
1360                 # SUBST
1361                 $mwSubst =& MagicWord::get( MAG_SUBST );
1362                 if ( $mwSubst->matchStartAndRemove( $part1 ) ) {
1363                         if ( $this->mOutputType != OT_WIKI ) {
1364                                 # Invalid SUBST not replaced at PST time
1365                                 # Return without further processing
1366                                 $text = $matches[0];
1367                                 $found = true;
1368                         }
1369                 } elseif ( $this->mOutputType == OT_WIKI ) {
1370                         # SUBST not found in PST pass, do nothing
1371                         $text = $matches[0];
1372                         $found = true;
1373                 }
1374
1375                 # MSG, MSGNW and INT
1376                 if ( !$found ) {
1377                         # Check for MSGNW:
1378                         $mwMsgnw =& MagicWord::get( MAG_MSGNW );
1379                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
1380                                 $nowiki = true;
1381                         } else {
1382                                 # Remove obsolete MSG:
1383                                 $mwMsg =& MagicWord::get( MAG_MSG );
1384                                 $mwMsg->matchStartAndRemove( $part1 );
1385                         }
1386
1387                         # Check if it is an internal message
1388                         $mwInt =& MagicWord::get( MAG_INT );
1389                         if ( $mwInt->matchStartAndRemove( $part1 ) ) {
1390                                 if ( $this->incrementIncludeCount( "int:$part1" ) ) {
1391                                         $text = wfMsgReal( $part1, $args, true );
1392                                         $found = true;
1393                                 }
1394                         }
1395                 }
1396
1397                 # NS
1398                 if ( !$found ) {
1399                         # Check for NS: (namespace expansion)
1400                         $mwNs = MagicWord::get( MAG_NS );
1401                         if ( $mwNs->matchStartAndRemove( $part1 ) ) {
1402                                 if ( intval( $part1 ) ) {
1403                                         $text = $wgLang->getNsText( intval( $part1 ) );
1404                                         $found = true;
1405                                 } else {
1406                                         $index = Namespace::getCanonicalIndex( strtolower( $part1 ) );
1407                                         if ( !is_null( $index ) ) {
1408                                                 $text = $wgLang->getNsText( $index );
1409                                                 $found = true;
1410                                         }
1411                                 }
1412                         }
1413                 }
1414
1415                 # LOCALURL and LOCALURLE
1416                 if ( !$found ) {
1417                         $mwLocal = MagicWord::get( MAG_LOCALURL );
1418                         $mwLocalE = MagicWord::get( MAG_LOCALURLE );
1419
1420                         if ( $mwLocal->matchStartAndRemove( $part1 ) ) {
1421                                 $func = 'getLocalURL';
1422                         } elseif ( $mwLocalE->matchStartAndRemove( $part1 ) ) {
1423                                 $func = 'escapeLocalURL';
1424                         } else {
1425                                 $func = '';
1426                         }
1427
1428                         if ( $func !== '' ) {
1429                                 $title = Title::newFromText( $part1 );
1430                                 if ( !is_null( $title ) ) {
1431                                         if ( $argc > 0 ) {
1432                                                 $text = $title->$func( $args[0] );
1433                                         } else {
1434                                                 $text = $title->$func();
1435                                         }
1436                                         $found = true;
1437                                 }
1438                         }
1439                 }
1440
1441                 # Internal variables
1442                 if ( !$found && array_key_exists( $part1, $this->mVariables ) ) {
1443                         $text = $this->mVariables[$part1];
1444                         $found = true;
1445                         $this->mOutput->mContainsOldMagic = true;
1446                 }
1447
1448                 # Arguments input from the caller
1449                 $inputArgs = end( $this->mArgStack );
1450                 if ( !$found && array_key_exists( $part1, $inputArgs ) ) {
1451                         $text = $inputArgs[$part1];
1452                         $found = true;
1453                 }
1454
1455                 # Load from database
1456                 if ( !$found ) {
1457                         $title = Title::newFromText( $part1, NS_TEMPLATE );
1458                         if ( !is_null( $title ) && !$title->isExternal() ) {
1459                                 # Check for excessive inclusion
1460                                 $dbk = $title->getPrefixedDBkey();
1461                                 if ( $this->incrementIncludeCount( $dbk ) ) {
1462                                         $article = new Article( $title );
1463                                         $articleContent = $article->getContentWithoutUsingSoManyDamnGlobals();
1464                                         if ( $articleContent !== false ) {
1465                                                 $found = true;
1466                                                 $text = $articleContent;
1467
1468                                         }
1469                                 }
1470
1471                                 # If the title is valid but undisplayable, make a link to it
1472                                 if ( $this->mOutputType == OT_HTML && !$found ) {
1473                                         $text = "[[" . $title->getPrefixedText() . "]]";
1474                                         $found = true;
1475                                 }
1476                         }
1477                 }
1478
1479                 # Recursive parsing, escaping and link table handling
1480                 # Only for HTML output
1481                 if ( $nowiki && $found && $this->mOutputType == OT_HTML ) {
1482                         $text = wfEscapeWikiText( $text );
1483                 } elseif ( $this->mOutputType == OT_HTML && $found ) {
1484                         # Clean up argument array
1485                         $assocArgs = array();
1486                         $index = 1;
1487                         foreach( $args as $arg ) {
1488                                 $eqpos = strpos( $arg, "=" );
1489                                 if ( $eqpos === false ) {
1490                                         $assocArgs[$index++] = $arg;
1491                                 } else {
1492                                         $name = trim( substr( $arg, 0, $eqpos ) );
1493                                         $value = trim( substr( $arg, $eqpos+1 ) );
1494                                         if ( $value === false ) {
1495                                                 $value = "";
1496                                         }
1497                                         if ( $name !== false ) {
1498                                                 $assocArgs[$name] = $value;
1499                                         }
1500                                 }
1501                         }
1502
1503                         # Do not enter included links in link table
1504                         if ( !is_null( $title ) ) {
1505                                 $wgLinkCache->suspend();
1506                         }
1507
1508                         # Run full parser on the included text
1509                         $text = $this->strip( $text, $this->mStripState );
1510                         $text = $this->internalParse( $text, (bool)$newline, $assocArgs, false );
1511
1512                         # Add the result to the strip state for re-inclusion after
1513                         # the rest of the processing
1514                         $text = $this->insertStripItem( $text, $this->mStripState );
1515
1516                         # Resume the link cache and register the inclusion as a link
1517                         if ( !is_null( $title ) ) {
1518                                 $wgLinkCache->resume();
1519                                 $wgLinkCache->addLinkObj( $title );
1520                         }
1521                 }
1522
1523                 if ( !$found ) {
1524                         return $matches[0];
1525                 } else {
1526                         return $text;
1527                 }
1528         }
1529
1530         # Returns true if the function is allowed to include this entity
1531         function incrementIncludeCount( $dbk )
1532         {
1533                 if ( !array_key_exists( $dbk, $this->mIncludeCount ) ) {
1534                         $this->mIncludeCount[$dbk] = 0;
1535                 }
1536                 if ( ++$this->mIncludeCount[$dbk] <= MAX_INCLUDE_REPEAT ) {
1537                         return true;
1538                 } else {
1539                         return false;
1540                 }
1541         }
1542
1543
1544         # Cleans up HTML, removes dangerous tags and attributes
1545         /* private */ function removeHTMLtags( $text )
1546         {
1547                 global $wgUseTidy, $wgUserHtml;
1548                 $fname = "Parser::removeHTMLtags";
1549                 wfProfileIn( $fname );
1550
1551                 if( $wgUserHtml ) {
1552                         $htmlpairs = array( # Tags that must be closed
1553                                 "b", "del", "i", "ins", "u", "font", "big", "small", "sub", "sup", "h1",
1554                                 "h2", "h3", "h4", "h5", "h6", "cite", "code", "em", "s",
1555                                 "strike", "strong", "tt", "var", "div", "center",
1556                                 "blockquote", "ol", "ul", "dl", "table", "caption", "pre",
1557                                 "ruby", "rt" , "rb" , "rp", "p"
1558                         );
1559                         $htmlsingle = array(
1560                                 "br", "hr", "li", "dt", "dd"
1561                         );
1562                         $htmlnest = array( # Tags that can be nested--??
1563                                 "table", "tr", "td", "th", "div", "blockquote", "ol", "ul",
1564                                 "dl", "font", "big", "small", "sub", "sup"
1565                         );
1566                         $tabletags = array( # Can only appear inside table
1567                                 "td", "th", "tr"
1568                         );
1569                 } else {
1570                         $htmlpairs = array();
1571                         $htmlsingle = array();
1572                         $htmlnest = array();
1573                         $tabletags = array();
1574                 }
1575
1576                 $htmlsingle = array_merge( $tabletags, $htmlsingle );
1577                 $htmlelements = array_merge( $htmlsingle, $htmlpairs );
1578
1579                 $htmlattrs = $this->getHTMLattrs () ;
1580
1581                 # Remove HTML comments
1582                 $text = preg_replace( "/(\\n *<!--.*--> *(?=\\n)|<!--.*-->)/sU", "$2", $text );
1583
1584                 $bits = explode( "<", $text );
1585                 $text = array_shift( $bits );
1586                 if(!$wgUseTidy) {
1587                         $tagstack = array(); $tablestack = array();
1588                         foreach ( $bits as $x ) {
1589                                 $prev = error_reporting( E_ALL & ~( E_NOTICE | E_WARNING ) );
1590                                 preg_match( "/^(\\/?)(\\w+)([^>]*)(\\/{0,1}>)([^<]*)$/",
1591                                 $x, $regs );
1592                                 list( $qbar, $slash, $t, $params, $brace, $rest ) = $regs;
1593                                 error_reporting( $prev );
1594
1595                                 $badtag = 0 ;
1596                                 if ( in_array( $t = strtolower( $t ), $htmlelements ) ) {
1597                                         # Check our stack
1598                                         if ( $slash ) {
1599                                                 # Closing a tag...
1600                                                 if ( ! in_array( $t, $htmlsingle ) &&
1601                                                 ( count($tagstack) && $ot = array_pop( $tagstack ) ) != $t ) {
1602                                                         if(!empty($ot)) array_push( $tagstack, $ot );
1603                                                         $badtag = 1;
1604                                                 } else {
1605                                                         if ( $t == "table" ) {
1606                                                                 $tagstack = array_pop( $tablestack );
1607                                                         }
1608                                                         $newparams = "";
1609                                                 }
1610                                         } else {
1611                                                 # Keep track for later
1612                                                 if ( in_array( $t, $tabletags ) &&
1613                                                 ! in_array( "table", $tagstack ) ) {
1614                                                         $badtag = 1;
1615                                                 } else if ( in_array( $t, $tagstack ) &&
1616                                                 ! in_array ( $t , $htmlnest ) ) {
1617                                                         $badtag = 1 ;
1618                                                 } else if ( ! in_array( $t, $htmlsingle ) ) {
1619                                                         if ( $t == "table" ) {
1620                                                                 array_push( $tablestack, $tagstack );
1621                                                                 $tagstack = array();
1622                                                         }
1623                                                         array_push( $tagstack, $t );
1624                                                 }
1625                                                 # Strip non-approved attributes from the tag
1626                                                 $newparams = $this->fixTagAttributes($params);
1627
1628                                         }
1629                                         if ( ! $badtag ) {
1630                                                 $rest = str_replace( ">", "&gt;", $rest );
1631                                                 $text .= "<$slash$t $newparams$brace$rest";
1632                                                 continue;
1633                                         }
1634                                 }
1635                                 $text .= "&lt;" . str_replace( ">", "&gt;", $x);
1636                         }
1637                         # Close off any remaining tags
1638                         while ( $t = array_pop( $tagstack ) ) {
1639                                 $text .= "</$t>\n";
1640                                 if ( $t == "table" ) { $tagstack = array_pop( $tablestack ); }
1641                         }
1642                 } else {
1643                         # this might be possible using tidy itself
1644                         foreach ( $bits as $x ) {
1645                                 preg_match( "/^(\\/?)(\\w+)([^>]*)(\\/{0,1}>)([^<]*)$/",
1646                                 $x, $regs );
1647                                 @list( $qbar, $slash, $t, $params, $brace, $rest ) = $regs;
1648                                 if ( in_array( $t = strtolower( $t ), $htmlelements ) ) {
1649                                         $newparams = $this->fixTagAttributes($params);
1650                                         $rest = str_replace( ">", "&gt;", $rest );
1651                                         $text .= "<$slash$t $newparams$brace$rest";
1652                                 } else {
1653                                         $text .= "&lt;" . str_replace( ">", "&gt;", $x);
1654                                 }
1655                         }
1656                 }
1657                 wfProfileOut( $fname );
1658                 return $text;
1659         }
1660
1661
1662 /*
1663  *
1664  * This function accomplishes several tasks:
1665  * 1) Auto-number headings if that option is enabled
1666  * 2) Add an [edit] link to sections for logged in users who have enabled the option
1667  * 3) Add a Table of contents on the top for users who have enabled the option
1668  * 4) Auto-anchor headings
1669  *
1670  * It loops through all headlines, collects the necessary data, then splits up the
1671  * string and re-inserts the newly formatted headlines.
1672  *
1673  */
1674
1675         /* private */ function formatHeadings( $text, $isMain=true )
1676         {
1677                 global $wgInputEncoding;
1678
1679                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
1680                 $doShowToc = $this->mOptions->getShowToc();
1681                 if( !$this->mTitle->userCanEdit() ) {
1682                         $showEditLink = 0;
1683                         $rightClickHack = 0;
1684                 } else {
1685                         $showEditLink = $this->mOptions->getEditSection();
1686                         $rightClickHack = $this->mOptions->getEditSectionOnRightClick();
1687                 }
1688
1689                 # Inhibit editsection links if requested in the page
1690                 $esw =& MagicWord::get( MAG_NOEDITSECTION );
1691                 if( $esw->matchAndRemove( $text ) ) {
1692                         $showEditLink = 0;
1693                 }
1694                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
1695                 # do not add TOC
1696                 $mw =& MagicWord::get( MAG_NOTOC );
1697                 if( $mw->matchAndRemove( $text ) ) {
1698                         $doShowToc = 0;
1699                 }
1700
1701                 # never add the TOC to the Main Page. This is an entry page that should not
1702                 # be more than 1-2 screens large anyway
1703                 if( $this->mTitle->getPrefixedText() == wfMsg("mainpage") ) {
1704                         $doShowToc = 0;
1705                 }
1706
1707                 # Get all headlines for numbering them and adding funky stuff like [edit]
1708                 # links - this is for later, but we need the number of headlines right now
1709                 $numMatches = preg_match_all( "/<H([1-6])(.*?" . ">)(.*?)<\/H[1-6]>/i", $text, $matches );
1710
1711                 # if there are fewer than 4 headlines in the article, do not show TOC
1712                 if( $numMatches < 4 ) {
1713                         $doShowToc = 0;
1714                 }
1715
1716                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
1717                 # override above conditions and always show TOC
1718                 $mw =& MagicWord::get( MAG_FORCETOC );
1719                 if ($mw->matchAndRemove( $text ) ) {
1720                         $doShowToc = 1;
1721                 }
1722
1723
1724                 # We need this to perform operations on the HTML
1725                 $sk =& $this->mOptions->getSkin();
1726
1727                 # headline counter
1728                 $headlineCount = 0;
1729
1730                 # Ugh .. the TOC should have neat indentation levels which can be
1731                 # passed to the skin functions. These are determined here
1732                 $toclevel = 0;
1733                 $toc = "";
1734                 $full = "";
1735                 $head = array();
1736                 $sublevelCount = array();
1737                 $level = 0;
1738                 $prevlevel = 0;
1739                 foreach( $matches[3] as $headline ) {
1740                         $numbering = "";
1741                         if( $level ) {
1742                                 $prevlevel = $level;
1743                         }
1744                         $level = $matches[1][$headlineCount];
1745                         if( ( $doNumberHeadings || $doShowToc ) && $prevlevel && $level > $prevlevel ) {
1746                                 # reset when we enter a new level
1747                                 $sublevelCount[$level] = 0;
1748                                 $toc .= $sk->tocIndent( $level - $prevlevel );
1749                                 $toclevel += $level - $prevlevel;
1750                         }
1751                         if( ( $doNumberHeadings || $doShowToc ) && $level < $prevlevel ) {
1752                                 # reset when we step back a level
1753                                 $sublevelCount[$level+1]=0;
1754                                 $toc .= $sk->tocUnindent( $prevlevel - $level );
1755                                 $toclevel -= $prevlevel - $level;
1756                         }
1757                         # count number of headlines for each level
1758                         @$sublevelCount[$level]++;
1759                         if( $doNumberHeadings || $doShowToc ) {
1760                                 $dot = 0;
1761                                 for( $i = 1; $i <= $level; $i++ ) {
1762                                         if( !empty( $sublevelCount[$i] ) ) {
1763                                                 if( $dot ) {
1764                                                         $numbering .= ".";
1765                                                 }
1766                                                 $numbering .= $sublevelCount[$i];
1767                                                 $dot = 1;
1768                                         }
1769                                 }
1770                         }
1771
1772                         # The canonized header is a version of the header text safe to use for links
1773                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
1774                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
1775
1776                         # strip out HTML
1777                         $canonized_headline = preg_replace( "/<.*?" . ">/","",$canonized_headline );
1778                         $tocline = trim( $canonized_headline );
1779                         $canonized_headline = preg_replace("/[ \\?&\\/<>\\(\\)\\[\\]=,+']+/", '_', urlencode( do_html_entity_decode( $tocline, ENT_COMPAT, $wgInputEncoding ) ) );
1780                         $refer[$headlineCount] = $canonized_headline;
1781
1782                         # count how many in assoc. array so we can track dupes in anchors
1783                         @$refers[$canonized_headline]++;
1784                         $refcount[$headlineCount]=$refers[$canonized_headline];
1785
1786                         # Prepend the number to the heading text
1787
1788                         if( $doNumberHeadings || $doShowToc ) {
1789                                 $tocline = $numbering . " " . $tocline;
1790
1791                                 # Don't number the heading if it is the only one (looks silly)
1792                                 if( $doNumberHeadings && count( $matches[3] ) > 1) {
1793                                         # the two are different if the line contains a link
1794                                         $headline=$numbering . " " . $headline;
1795                                 }
1796                         }
1797
1798                         # Create the anchor for linking from the TOC to the section
1799                         $anchor = $canonized_headline;
1800                         if($refcount[$headlineCount] > 1 ) {
1801                                 $anchor .= "_" . $refcount[$headlineCount];
1802                         }
1803                         if( $doShowToc ) {
1804                                 $toc .= $sk->tocLine($anchor,$tocline,$toclevel);
1805                         }
1806                         if( $showEditLink ) {
1807                                 if ( empty( $head[$headlineCount] ) ) {
1808                                         $head[$headlineCount] = "";
1809                                 }
1810                                 $head[$headlineCount] .= $sk->editSectionLink($headlineCount+1);
1811                         }
1812
1813                         # Add the edit section span
1814                         if( $rightClickHack ) {
1815                                 $headline = $sk->editSectionScript($headlineCount+1,$headline);
1816                         }
1817
1818                         # give headline the correct <h#> tag
1819                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline."</h".$level.">";
1820
1821                         $headlineCount++;
1822                 }
1823
1824                 if( $doShowToc ) {
1825                         $toclines = $headlineCount;
1826                         $toc .= $sk->tocUnindent( $toclevel );
1827                         $toc = $sk->tocTable( $toc );
1828                 }
1829
1830                 # split up and insert constructed headlines
1831
1832                 $blocks = preg_split( "/<H[1-6].*?" . ">.*?<\/H[1-6]>/i", $text );
1833                 $i = 0;
1834
1835                 foreach( $blocks as $block ) {
1836                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
1837                             # This is the [edit] link that appears for the top block of text when
1838                                 # section editing is enabled
1839
1840                                 # Disabled because it broke block formatting
1841                                 # For example, a bullet point in the top line
1842                                 # $full .= $sk->editSectionLink(0);
1843                         }
1844                         $full .= $block;
1845                         if( $doShowToc && !$i && $isMain) {
1846                         # Top anchor now in skin
1847                                 $full = $full.$toc;
1848                         }
1849
1850                         if( !empty( $head[$i] ) ) {
1851                                 $full .= $head[$i];
1852                         }
1853                         $i++;
1854                 }
1855
1856                 return $full;
1857         }
1858
1859         /* private */ function doMagicISBN( &$tokenizer )
1860         {
1861                 global $wgLang;
1862
1863                 # Check whether next token is a text token
1864                 # If yes, fetch it and convert the text into a
1865                 # Special::BookSources link
1866                 $token = $tokenizer->previewToken();
1867                 while ( $token["type"] == "" )
1868                 {
1869                         $tokenizer->nextToken();
1870                         $token = $tokenizer->previewToken();
1871                 }
1872                 if ( $token["type"] == "text" )
1873                 {
1874                         $token = $tokenizer->nextToken();
1875                         $x = $token["text"];
1876                         $valid = "0123456789-ABCDEFGHIJKLMNOPQRSTUVWXYZ";
1877
1878                         $isbn = $blank = "" ;
1879                         while ( " " == $x{0} ) {
1880                                 $blank .= " ";
1881                                 $x = substr( $x, 1 );
1882                         }
1883                         while ( strstr( $valid, $x{0} ) != false ) {
1884                                 $isbn .= $x{0};
1885                                 $x = substr( $x, 1 );
1886                         }
1887                         $num = str_replace( "-", "", $isbn );
1888                         $num = str_replace( " ", "", $num );
1889
1890                         if ( "" == $num ) {
1891                                 $text = "ISBN $blank$x";
1892                         } else {
1893                                 $titleObj = Title::makeTitle( NS_SPECIAL, "Booksources" );
1894                                 $text = "<a href=\"" .
1895                                 $titleObj->escapeLocalUrl( "isbn={$num}" ) .
1896                                         "\" class=\"internal\">ISBN $isbn</a>";
1897                                 $text .= $x;
1898                         }
1899                 } else {
1900                         $text = "ISBN ";
1901                 }
1902                 return $text;
1903         }
1904         /* private */ function doMagicRFC( &$tokenizer )
1905         {
1906                 global $wgLang;
1907
1908                 # Check whether next token is a text token
1909                 # If yes, fetch it and convert the text into a
1910                 # link to an RFC source
1911                 $token = $tokenizer->previewToken();
1912                 while ( $token["type"] == "" )
1913                 {
1914                         $tokenizer->nextToken();
1915                         $token = $tokenizer->previewToken();
1916                 }
1917                 if ( $token["type"] == "text" )
1918                 {
1919                         $token = $tokenizer->nextToken();
1920                         $x = $token["text"];
1921                         $valid = "0123456789";
1922
1923                         $rfc = $blank = "" ;
1924                         while ( " " == $x{0} ) {
1925                                 $blank .= " ";
1926                                 $x = substr( $x, 1 );
1927                         }
1928                         while ( strstr( $valid, $x{0} ) != false ) {
1929                                 $rfc .= $x{0};
1930                                 $x = substr( $x, 1 );
1931                         }
1932
1933                         if ( "" == $rfc ) {
1934                                 $text .= "RFC $blank$x";
1935                         } else {
1936                                 $url = wfmsg( "rfcurl" );
1937                                 $url = str_replace( "$1", $rfc, $url);
1938                                 $sk =& $this->mOptions->getSkin();
1939                                 $la = $sk->getExternalLinkAttributes( $url, "RFC {$rfc}" );
1940                                 $text = "<a href='{$url}'{$la}>RFC {$rfc}</a>{$x}";
1941                         }
1942                 } else {
1943                         $text = "RFC ";
1944                 }
1945                 return $text;
1946         }
1947
1948         function preSaveTransform( $text, &$title, &$user, $options, $clearState = true )
1949         {
1950                 $this->mOptions = $options;
1951                 $this->mTitle =& $title;
1952                 $this->mOutputType = OT_WIKI;
1953
1954                 if ( $clearState ) {
1955                         $this->clearState();
1956                 }
1957
1958                 $stripState = false;
1959                 $pairs = array(
1960                         "\r\n" => "\n",
1961                         );
1962                 $text = str_replace(array_keys($pairs), array_values($pairs), $text);
1963                 // now with regexes
1964                 $pairs = array(
1965                         "/<br.+(clear|break)=[\"']?(all|both)[\"']?\\/?>/i" => '<br style="clear:both;"/>',
1966                         "/<br *?>/i" => "<br/>",
1967                 );
1968                 $text = preg_replace(array_keys($pairs), array_values($pairs), $text);
1969                 $text = $this->strip( $text, $stripState, false );
1970                 $text = $this->pstPass2( $text, $user );
1971                 $text = $this->unstrip( $text, $stripState );
1972                 return $text;
1973         }
1974
1975         /* private */ function pstPass2( $text, &$user )
1976         {
1977                 global $wgLang, $wgLocaltimezone, $wgCurParser;
1978
1979                 # Variable replacement
1980                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
1981                 $text = $this->replaceVariables( $text );
1982
1983                 # Signatures
1984                 #
1985                 $n = $user->getName();
1986                 $k = $user->getOption( "nickname" );
1987                 if ( "" == $k ) { $k = $n; }
1988                 if(isset($wgLocaltimezone)) {
1989                         $oldtz = getenv("TZ"); putenv("TZ=$wgLocaltimezone");
1990                 }
1991                 /* Note: this is an ugly timezone hack for the European wikis */
1992                 $d = $wgLang->timeanddate( date( "YmdHis" ), false ) .
1993                   " (" . date( "T" ) . ")";
1994                 if(isset($wgLocaltimezone)) putenv("TZ=$oldtz");
1995
1996                 $text = preg_replace( "/~~~~~/", $d, $text );
1997                 $text = preg_replace( "/~~~~/", "[[" . $wgLang->getNsText(
1998                   Namespace::getUser() ) . ":$n|$k]] $d", $text );
1999                 $text = preg_replace( "/~~~/", "[[" . $wgLang->getNsText(
2000                   Namespace::getUser() ) . ":$n|$k]]", $text );
2001
2002                 # Context links: [[|name]] and [[name (context)|]]
2003                 #
2004                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
2005                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
2006                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
2007                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
2008
2009                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
2010                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
2011                 $p3 = "/\[\[($namespacechar+):({$np}+)\\|]]/";          # [[namespace:page|]]
2012                 $p4 = "/\[\[($namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/";
2013                                                                                                                 # [[ns:page (cont)|]]
2014                 $context = "";
2015                 $t = $this->mTitle->getText();
2016                 if ( preg_match( $conpat, $t, $m ) ) {
2017                         $context = $m[2];
2018                 }
2019                 $text = preg_replace( $p4, "[[\\1:\\2 (\\3)|\\2]]", $text );
2020                 $text = preg_replace( $p1, "[[\\1 (\\2)|\\1]]", $text );
2021                 $text = preg_replace( $p3, "[[\\1:\\2|\\2]]", $text );
2022
2023                 if ( "" == $context ) {
2024                         $text = preg_replace( $p2, "[[\\1]]", $text );
2025                 } else {
2026                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
2027                 }
2028
2029                 /*
2030                 $mw =& MagicWord::get( MAG_SUBST );
2031                 $wgCurParser = $this->fork();
2032                 $text = $mw->substituteCallback( $text, "wfBraceSubstitution" );
2033                 $this->merge( $wgCurParser );
2034                 */
2035
2036                 # Trim trailing whitespace
2037                 # MAG_END (__END__) tag allows for trailing
2038                 # whitespace to be deliberately included
2039                 $text = rtrim( $text );
2040                 $mw =& MagicWord::get( MAG_END );
2041                 $mw->matchAndRemove( $text );
2042
2043                 return $text;
2044         }
2045
2046         # Set up some variables which are usually set up in parse()
2047         # so that an external function can call some class members with confidence
2048         function startExternalParse( &$title, $options, $outputType, $clearState = true )
2049         {
2050                 $this->mTitle =& $title;
2051                 $this->mOptions = $options;
2052                 $this->mOutputType = $outputType;
2053                 if ( $clearState ) {
2054                         $this->clearState();
2055                 }
2056         }
2057
2058         function transformMsg( $text, $options ) {
2059                 global $wgTitle;
2060                 static $executing = false;
2061
2062                 # Guard against infinite recursion
2063                 if ( $executing ) {
2064                         return $text;
2065                 }
2066                 $executing = true;
2067
2068                 $this->mTitle = $wgTitle;
2069                 $this->mOptions = $options;
2070                 $this->mOutputType = OT_MSG;
2071                 $this->clearState();
2072                 $text = $this->replaceVariables( $text );
2073
2074                 $executing = false;
2075                 return $text;
2076         }
2077 }
2078
2079 class ParserOutput
2080 {
2081         var $mText, $mLanguageLinks, $mCategoryLinks, $mContainsOldMagic;
2082
2083         function ParserOutput( $text = "", $languageLinks = array(), $categoryLinks = array(),
2084                 $containsOldMagic = false )
2085         {
2086                 $this->mText = $text;
2087                 $this->mLanguageLinks = $languageLinks;
2088                 $this->mCategoryLinks = $categoryLinks;
2089                 $this->mContainsOldMagic = $containsOldMagic;
2090         }
2091
2092         function getText() { return $this->mText; }
2093         function getLanguageLinks() { return $this->mLanguageLinks; }
2094         function getCategoryLinks() { return $this->mCategoryLinks; }
2095         function containsOldMagic() { return $this->mContainsOldMagic; }
2096         function setText( $text ) { return wfSetVar( $this->mText, $text ); }
2097         function setLanguageLinks( $ll ) { return wfSetVar( $this->mLanguageLinks, $ll ); }
2098         function setCategoryLinks( $cl ) { return wfSetVar( $this->mCategoryLinks, $cl ); }
2099         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
2100
2101         function merge( $other ) {
2102                 $this->mLanguageLinks = array_merge( $this->mLanguageLinks, $other->mLanguageLinks );
2103                 $this->mCategoryLinks = array_merge( $this->mCategoryLinks, $this->mLanguageLinks );
2104                 $this->mContainsOldMagic = $this->mContainsOldMagic || $other->mContainsOldMagic;
2105         }
2106
2107 }
2108
2109 class ParserOptions
2110 {
2111         # All variables are private
2112         var $mUseTeX;                    # Use texvc to expand <math> tags
2113         var $mUseCategoryMagic;          # Treat [[Category:xxxx]] tags specially
2114         var $mUseDynamicDates;           # Use $wgDateFormatter to format dates
2115         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
2116         var $mAllowExternalImages;       # Allow external images inline
2117         var $mSkin;                      # Reference to the preferred skin
2118         var $mDateFormat;                # Date format index
2119         var $mEditSection;               # Create "edit section" links
2120         var $mEditSectionOnRightClick;   # Generate JavaScript to edit section on right click
2121         var $mNumberHeadings;            # Automatically number headings
2122         var $mShowToc;                   # Show table of contents
2123
2124         function getUseTeX() { return $this->mUseTeX; }
2125         function getUseCategoryMagic() { return $this->mUseCategoryMagic; }
2126         function getUseDynamicDates() { return $this->mUseDynamicDates; }
2127         function getInterwikiMagic() { return $this->mInterwikiMagic; }
2128         function getAllowExternalImages() { return $this->mAllowExternalImages; }
2129         function getSkin() { return $this->mSkin; }
2130         function getDateFormat() { return $this->mDateFormat; }
2131         function getEditSection() { return $this->mEditSection; }
2132         function getEditSectionOnRightClick() { return $this->mEditSectionOnRightClick; }
2133         function getNumberHeadings() { return $this->mNumberHeadings; }
2134         function getShowToc() { return $this->mShowToc; }
2135
2136         function setUseTeX( $x ) { return wfSetVar( $this->mUseTeX, $x ); }
2137         function setUseCategoryMagic( $x ) { return wfSetVar( $this->mUseCategoryMagic, $x ); }
2138         function setUseDynamicDates( $x ) { return wfSetVar( $this->mUseDynamicDates, $x ); }
2139         function setInterwikiMagic( $x ) { return wfSetVar( $this->mInterwikiMagic, $x ); }
2140         function setAllowExternalImages( $x ) { return wfSetVar( $this->mAllowExternalImages, $x ); }
2141         function setSkin( $x ) { return wfSetRef( $this->mSkin, $x ); }
2142         function setDateFormat( $x ) { return wfSetVar( $this->mDateFormat, $x ); }
2143         function setEditSection( $x ) { return wfSetVar( $this->mEditSection, $x ); }
2144         function setEditSectionOnRightClick( $x ) { return wfSetVar( $this->mEditSectionOnRightClick, $x ); }
2145         function setNumberHeadings( $x ) { return wfSetVar( $this->mNumberHeadings, $x ); }
2146         function setShowToc( $x ) { return wfSetVar( $this->mShowToc, $x ); }
2147
2148         /* static */ function newFromUser( &$user )
2149         {
2150                 $popts = new ParserOptions;
2151                 $popts->initialiseFromUser( $user );
2152                 return $popts;
2153         }
2154
2155         function initialiseFromUser( &$userInput )
2156         {
2157                 global $wgUseTeX, $wgUseCategoryMagic, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
2158
2159                 if ( !$userInput ) {
2160                         $user = new User;
2161                         $user->setLoaded( true );
2162                 } else {
2163                         $user =& $userInput;
2164                 }
2165
2166                 $this->mUseTeX = $wgUseTeX;
2167                 $this->mUseCategoryMagic = $wgUseCategoryMagic;
2168                 $this->mUseDynamicDates = $wgUseDynamicDates;
2169                 $this->mInterwikiMagic = $wgInterwikiMagic;
2170                 $this->mAllowExternalImages = $wgAllowExternalImages;
2171                 $this->mSkin =& $user->getSkin();
2172                 $this->mDateFormat = $user->getOption( "date" );
2173                 $this->mEditSection = $user->getOption( "editsection" );
2174                 $this->mEditSectionOnRightClick = $user->getOption( "editsectiononrightclick" );
2175                 $this->mNumberHeadings = $user->getOption( "numberheadings" );
2176                 $this->mShowToc = $user->getOption( "showtoc" );
2177         }
2178
2179
2180 }
2181
2182 # Regex callbacks, used in Parser::replaceVariables
2183 function wfBraceSubstitution( $matches )
2184 {
2185         global $wgCurParser;
2186         return $wgCurParser->braceSubstitution( $matches );
2187 }
2188
2189 ?>