includes/Parser.php

   1 <?php
   2 /**
   3  * File for Parser and related classes
   4  *
   5  * @package MediaWiki
   6  */
   7
   8 /** */
   9 require_once( 'Sanitizer.php' );
  10
  11 /**
  12  * Update this version number when the ParserOutput format
  13  * changes in an incompatible way, so the parser cache
  14  * can automatically discard old data.
  15  */
  16 define( 'MW_PARSER_VERSION', '1.5.0' );
  17
  18 /**
  19  * Variable substitution O(N^2) attack
  20  *
  21  * Without countermeasures, it would be possible to attack the parser by saving
  22  * a page filled with a large number of inclusions of large pages. The size of
  23  * the generated page would be proportional to the square of the input size.
  24  * Hence, we limit the number of inclusions of any given page, thus bringing any
  25  * attack back to O(N).
  26  */
  27
  28 define( 'MAX_INCLUDE_REPEAT', 100 );
  29 define( 'MAX_INCLUDE_SIZE', 1000000 ); // 1 Million
  30
  31 define( 'RLH_FOR_UPDATE', 1 );
  32
  33 # Allowed values for $mOutputType
  34 define( 'OT_HTML', 1 );
  35 define( 'OT_WIKI', 2 );
  36 define( 'OT_MSG' , 3 );
  37
  38 # string parameter for extractTags which will cause it
  39 # to strip HTML comments in addition to regular
  40 # <XML>-style tags. This should not be anything we
  41 # may want to use in wikisyntax
  42 define( 'STRIP_COMMENTS', 'HTMLCommentStrip' );
  43
  44 # prefix for escaping, used in two functions at least
  45 define( 'UNIQ_PREFIX', 'NaodW29');
  46
  47 # Constants needed for external link processing
  48 define( 'URL_PROTOCOLS', 'http|https|ftp|irc|gopher|news|mailto' );
  49 define( 'HTTP_PROTOCOLS', 'http|https' );
  50 # Everything except bracket, space, or control characters
  51 define( 'EXT_LINK_URL_CLASS', '[^]<>"\\x00-\\x20\\x7F]' );
  52 # Including space
  53 define( 'EXT_LINK_TEXT_CLASS', '[^\]\\x00-\\x1F\\x7F]' );
  54 define( 'EXT_IMAGE_FNAME_CLASS', '[A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]' );
  55 define( 'EXT_IMAGE_EXTENSIONS', 'gif|png|jpg|jpeg' );
  56 define( 'EXT_LINK_BRACKETED',  '/\[(\b('.URL_PROTOCOLS.'):'.EXT_LINK_URL_CLASS.'+) *('.EXT_LINK_TEXT_CLASS.'*?)\]/S' );
  57 define( 'EXT_IMAGE_REGEX',
  58         '/^('.HTTP_PROTOCOLS.':)'.  # Protocol
  59         '('.EXT_LINK_URL_CLASS.'+)\\/'.  # Hostname and path
  60         '('.EXT_IMAGE_FNAME_CLASS.'+)\\.((?i)'.EXT_IMAGE_EXTENSIONS.')$/S' # Filename
  61 );
  62
  63 /**
  64  * PHP Parser
  65  *
  66  * Processes wiki markup
  67  *
  68  * <pre>
  69  * There are three main entry points into the Parser class:
  70  * parse()
  71  *   produces HTML output
  72  * preSaveTransform().
  73  *   produces altered wiki markup.
  74  * transformMsg()
  75  *   performs brace substitution on MediaWiki messages
  76  *
  77  * Globals used:
  78  *    objects:   $wgLang, $wgDateFormatter, $wgLinkCache
  79  *
  80  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  81  *
  82  * settings:
  83  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  84  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  85  *  $wgLocaltimezone
  86  *
  87  *  * only within ParserOptions
  88  * </pre>
  89  *
  90  * @package MediaWiki
  91  */
  92 class Parser
  93 {
  94         /**#@+
  95          * @access private
  96          */
  97         # Persistent:
  98         var $mTagHooks;
  99
 100         # Cleared with clearState():
 101         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
 102         var $mVariables, $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 103
 104         # Temporary:
 105         var $mOptions, $mTitle, $mOutputType,
 106             $mTemplates,        // cache of already loaded templates, avoids
 107                                 // multiple SQL queries for the same string
 108             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
 109                                 // in this path. Used for loop detection.
 110
 111         /**#@-*/
 112
 113         /**
 114          * Constructor
 115          *
 116          * @access public
 117          */
 118         function Parser() {
 119                 $this->mTemplates = array();
 120                 $this->mTemplatePath = array();
 121                 $this->mTagHooks = array();
 122                 $this->clearState();
 123         }
 124
 125         /**
 126          * Clear Parser state
 127          *
 128          * @access private
 129          */
 130         function clearState() {
 131                 $this->mOutput = new ParserOutput;
 132                 $this->mAutonumber = 0;
 133                 $this->mLastSection = '';
 134                 $this->mDTopen = false;
 135                 $this->mVariables = false;
 136                 $this->mIncludeCount = array();
 137                 $this->mStripState = array();
 138                 $this->mArgStack = array();
 139                 $this->mInPre = false;
 140         }
 141
 142         /**
 143          * First pass--just handle <nowiki> sections, pass the rest off
 144          * to internalParse() which does all the real work.
 145          *
 146          * @access private
 147          * @param string $text Text we want to parse
 148          * @param Title &$title A title object
 149          * @param array $options
 150          * @param boolean $linestart
 151          * @param boolean $clearState
 152          * @return ParserOutput a ParserOutput
 153          */
 154         function parse( $text, &$title, $options, $linestart = true, $clearState = true ) {
 155                 global $wgUseTidy, $wgContLang;
 156                 $fname = 'Parser::parse';
 157                 wfProfileIn( $fname );
 158
 159                 if ( $clearState ) {
 160                         $this->clearState();
 161                 }
 162
 163                 $this->mOptions = $options;
 164                 $this->mTitle =& $title;
 165                 $this->mOutputType = OT_HTML;
 166
 167                 $stripState = NULL;
 168                 global $fnord; $fnord = 1;
 169                 //$text = $this->strip( $text, $this->mStripState );
 170                 // VOODOO MAGIC FIX! Sometimes the above segfaults in PHP5.
 171                 $x =& $this->mStripState;
 172                 $text = $this->strip( $text, $x );
 173
 174                 $text = $this->internalParse( $text, $linestart );
 175
 176                 $dashReplace = array(
 177                         '/ - /' => "&nbsp;&ndash; ", # N dash
 178                         '/(?<=[0-9])-(?=[0-9])/' => "&ndash;", # N dash between numbers
 179                         '/ -- /' => "&nbsp;&mdash; " # M dash
 180                 );
 181                 $text = preg_replace( array_keys($dashReplace), array_values($dashReplace), $text );
 182
 183
 184                 $text = $this->unstrip( $text, $this->mStripState );
 185                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 186                 global $wgUseTidy;
 187                 if(!$wgUseTidy) {
 188                         $fixtags = array(
 189                                 # french spaces, last one Guillemet-left
 190                                 # only if there is something before the space
 191                                 '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 192                                 # french spaces, Guillemet-right
 193                                 '/(\\302\\253) /' => '\\1&nbsp;',
 194                                 '/<hr *>/i' => '<hr />',
 195                                 '/<br *>/i' => '<br />',
 196                                 '/<center *>/i' => '<div class="center">',
 197                                 '/<\\/center *>/i' => '</div>',
 198                         );
 199                         $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 200                         $text = Sanitizer::normalizeCharReferences( $text );
 201                 } else {
 202                         $fixtags = array(
 203                                 # french spaces, last one Guillemet-left
 204                                 '/ (\\?|:|;|!|\\302\\273)/' => '&nbsp;\\1',
 205                                 # french spaces, Guillemet-right
 206                                 '/(\\302\\253) /' => '\\1&nbsp;',
 207                                 '/<center *>/i' => '<div class="center">',
 208                                 '/<\\/center *>/i' => '</div>'
 209                         );
 210                         $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 211                 }
 212                 # only once and last
 213                 $text = $this->doBlockLevels( $text, $linestart );
 214
 215                 $this->replaceLinkHolders( $text );
 216                 $text = $wgContLang->convert($text);
 217                 $this->mOutput->setTitleText($wgContLang->getParsedTitle());
 218                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 219                 if ($wgUseTidy) {
 220                         $text = Parser::tidy($text);
 221                 }
 222
 223                 $this->mOutput->setText( $text );
 224                 wfProfileOut( $fname );
 225                 return $this->mOutput;
 226         }
 227
 228         /**
 229          * Get a random string
 230          *
 231          * @access private
 232          * @static
 233          */
 234         function getRandomString() {
 235                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 236         }
 237
 238         /**
 239          * Replaces all occurrences of <$tag>content</$tag> in the text
 240          * with a random marker and returns the new text. the output parameter
 241          * $content will be an associative array filled with data on the form
 242          * $unique_marker => content.
 243          *
 244          * If $content is already set, the additional entries will be appended
 245          * If $tag is set to STRIP_COMMENTS, the function will extract
 246          * <!-- HTML comments -->
 247          *
 248          * @access private
 249          * @static
 250          */
 251         function extractTags($tag, $text, &$content, $uniq_prefix = ''){
 252                 $rnd = $uniq_prefix . '-' . $tag . Parser::getRandomString();
 253                 if ( !$content ) {
 254                         $content = array( );
 255                 }
 256                 $n = 1;
 257                 $stripped = '';
 258
 259                 while ( '' != $text ) {
 260                         if($tag==STRIP_COMMENTS) {
 261                                 $p = preg_split( '/<!--/', $text, 2 );
 262                         } else {
 263                                 $p = preg_split( "/<\\s*$tag\\s*>/i", $text, 2 );
 264                         }
 265                         $stripped .= $p[0];
 266                         if ( ( count( $p ) < 2 ) || ( '' == $p[1] ) ) {
 267                                 $text = '';
 268                         } else {
 269                                 if($tag==STRIP_COMMENTS) {
 270                                         $q = preg_split( '/-->/i', $p[1], 2 );
 271                                 } else {
 272                                         $q = preg_split( "/<\\/\\s*$tag\\s*>/i", $p[1], 2 );
 273                                 }
 274                                 $marker = $rnd . sprintf('%08X', $n++);
 275                                 $content[$marker] = $q[0];
 276                                 $stripped .= $marker;
 277                                 $text = $q[1];
 278                         }
 279                 }
 280                 return $stripped;
 281         }
 282
 283         /**
 284          * Strips and renders nowiki, pre, math, hiero
 285          * If $render is set, performs necessary rendering operations on plugins
 286          * Returns the text, and fills an array with data needed in unstrip()
 287          * If the $state is already a valid strip state, it adds to the state
 288          *
 289          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 290          *  will be stripped in addition to other tags. This is important
 291          *  for section editing, where these comments cause confusion when
 292          *  counting the sections in the wikisource
 293          *
 294          * @access private
 295          */
 296         function strip( $text, &$state, $stripcomments = false ) {
 297                 $render = ($this->mOutputType == OT_HTML);
 298                 $html_content = array();
 299                 $nowiki_content = array();
 300                 $math_content = array();
 301                 $pre_content = array();
 302                 $comment_content = array();
 303                 $ext_content = array();
 304                 $gallery_content = array();
 305
 306                 # Replace any instances of the placeholders
 307                 $uniq_prefix = UNIQ_PREFIX;
 308                 #$text = str_replace( $uniq_prefix, wfHtmlEscapeFirst( $uniq_prefix ), $text );
 309
 310                 # html
 311                 global $wgRawHtml, $wgWhitelistEdit;
 312                 if( $wgRawHtml && $wgWhitelistEdit ) {
 313                         $text = Parser::extractTags('html', $text, $html_content, $uniq_prefix);
 314                         foreach( $html_content as $marker => $content ) {
 315                                 if ($render ) {
 316                                         # Raw and unchecked for validity.
 317                                         $html_content[$marker] = $content;
 318                                 } else {
 319                                         $html_content[$marker] = '<html>'.$content.'</html>';
 320                                 }
 321                         }
 322                 }
 323
 324                 # nowiki
 325                 $text = Parser::extractTags('nowiki', $text, $nowiki_content, $uniq_prefix);
 326                 foreach( $nowiki_content as $marker => $content ) {
 327                         if( $render ){
 328                                 $nowiki_content[$marker] = wfEscapeHTMLTagsOnly( $content );
 329                         } else {
 330                                 $nowiki_content[$marker] = '<nowiki>'.$content.'</nowiki>';
 331                         }
 332                 }
 333
 334                 # math
 335                 $text = Parser::extractTags('math', $text, $math_content, $uniq_prefix);
 336                 foreach( $math_content as $marker => $content ){
 337                         if( $render ) {
 338                                 if( $this->mOptions->getUseTeX() ) {
 339                                         $math_content[$marker] = renderMath( $content );
 340                                 } else {
 341                                         $math_content[$marker] = '&lt;math&gt;'.$content.'&lt;math&gt;';
 342                                 }
 343                         } else {
 344                                 $math_content[$marker] = '<math>'.$content.'</math>';
 345                         }
 346                 }
 347
 348                 # pre
 349                 $text = Parser::extractTags('pre', $text, $pre_content, $uniq_prefix);
 350                 foreach( $pre_content as $marker => $content ){
 351                         if( $render ){
 352                                 $pre_content[$marker] = '<pre>' . wfEscapeHTMLTagsOnly( $content ) . '</pre>';
 353                         } else {
 354                                 $pre_content[$marker] = '<pre>'.$content.'</pre>';
 355                         }
 356                 }
 357
 358                 # gallery
 359                 $text = Parser::extractTags('gallery', $text, $gallery_content, $uniq_prefix);
 360                 foreach( $gallery_content as $marker => $content ) {
 361                         require_once( 'ImageGallery.php' );
 362                         if ( $render ) {
 363                                 $gallery_content[$marker] = Parser::renderImageGallery( $content );
 364                         } else {
 365                                 $gallery_content[$marker] = '<gallery>'.$content.'</gallery>';
 366                         }
 367                 }
 368
 369                 # Comments
 370                 if($stripcomments) {
 371                         $text = Parser::extractTags(STRIP_COMMENTS, $text, $comment_content, $uniq_prefix);
 372                         foreach( $comment_content as $marker => $content ){
 373                                 $comment_content[$marker] = '<!--'.$content.'-->';
 374                         }
 375                 }
 376
 377                 # Extensions
 378                 foreach ( $this->mTagHooks as $tag => $callback ) {
 379                         $ext_contents[$tag] = array();
 380                         $text = Parser::extractTags( $tag, $text, $ext_content[$tag], $uniq_prefix );
 381                         foreach( $ext_content[$tag] as $marker => $content ) {
 382                                 if ( $render ) {
 383                                         $ext_content[$tag][$marker] = $callback( $content );
 384                                 } else {
 385                                         $ext_content[$tag][$marker] = "<$tag>$content</$tag>";
 386                                 }
 387                         }
 388                 }
 389
 390                 # Merge state with the pre-existing state, if there is one
 391                 if ( $state ) {
 392                         $state['html'] = $state['html'] + $html_content;
 393                         $state['nowiki'] = $state['nowiki'] + $nowiki_content;
 394                         $state['math'] = $state['math'] + $math_content;
 395                         $state['pre'] = $state['pre'] + $pre_content;
 396                         $state['comment'] = $state['comment'] + $comment_content;
 397                         $state['gallery'] = $state['gallery'] + $gallery_content;
 398
 399                         foreach( $ext_content as $tag => $array ) {
 400                                 if ( array_key_exists( $tag, $state ) ) {
 401                                         $state[$tag] = $state[$tag] + $array;
 402                                 }
 403                         }
 404                 } else {
 405                         $state = array(
 406                           'html' => $html_content,
 407                           'nowiki' => $nowiki_content,
 408                           'math' => $math_content,
 409                           'pre' => $pre_content,
 410                           'comment' => $comment_content,
 411                           'gallery' => $gallery_content,
 412                         ) + $ext_content;
 413                 }
 414                 return $text;
 415         }
 416
 417         /**
 418          * restores pre, math, and hiero removed by strip()
 419          *
 420          * always call unstripNoWiki() after this one
 421          * @access private
 422          */
 423         function unstrip( $text, &$state ) {
 424                 # Must expand in reverse order, otherwise nested tags will be corrupted
 425                 $contentDict = end( $state );
 426                 for ( $contentDict = end( $state ); $contentDict !== false; $contentDict = prev( $state ) ) {
 427                         if( key($state) != 'nowiki' && key($state) != 'html') {
 428                                 for ( $content = end( $contentDict ); $content !== false; $content = prev( $contentDict ) ) {
 429                                         $text = str_replace( key( $contentDict ), $content, $text );
 430                                 }
 431                         }
 432                 }
 433
 434                 return $text;
 435         }
 436
 437         /**
 438          * always call this after unstrip() to preserve the order
 439          *
 440          * @access private
 441          */
 442         function unstripNoWiki( $text, &$state ) {
 443                 # Must expand in reverse order, otherwise nested tags will be corrupted
 444                 for ( $content = end($state['nowiki']); $content !== false; $content = prev( $state['nowiki'] ) ) {
 445                         $text = str_replace( key( $state['nowiki'] ), $content, $text );
 446                 }
 447
 448                 global $wgRawHtml;
 449                 if ($wgRawHtml) {
 450                         for ( $content = end($state['html']); $content !== false; $content = prev( $state['html'] ) ) {
 451                                 $text = str_replace( key( $state['html'] ), $content, $text );
 452                         }
 453                 }
 454
 455                 return $text;
 456         }
 457
 458         /**
 459          * Add an item to the strip state
 460          * Returns the unique tag which must be inserted into the stripped text
 461          * The tag will be replaced with the original text in unstrip()
 462          *
 463          * @access private
 464          */
 465         function insertStripItem( $text, &$state ) {
 466                 $rnd = UNIQ_PREFIX . '-item' . Parser::getRandomString();
 467                 if ( !$state ) {
 468                         $state = array(
 469                           'html' => array(),
 470                           'nowiki' => array(),
 471                           'math' => array(),
 472                           'pre' => array()
 473                         );
 474                 }
 475                 $state['item'][$rnd] = $text;
 476                 return $rnd;
 477         }
 478
 479         /**
 480          * interface with html tidy, used if $wgUseTidy = true
 481          *
 482          * @access public
 483          * @static
 484          */
 485         function tidy ( $text ) {
 486                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 487                 $fname = 'Parser::tidy';
 488                 wfProfileIn( $fname );
 489
 490                 $cleansource = '';
 491                 $opts = ' -utf8';
 492
 493                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 494 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 495 '<head><title>test</title></head><body>'.$text.'</body></html>';
 496                 $descriptorspec = array(
 497                         0 => array('pipe', 'r'),
 498                         1 => array('pipe', 'w'),
 499                         2 => array('file', '/dev/null', 'a')
 500                 );
 501                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 502                 if (is_resource($process)) {
 503                         fwrite($pipes[0], $wrappedtext);
 504                         fclose($pipes[0]);
 505                         while (!feof($pipes[1])) {
 506                                 $cleansource .= fgets($pipes[1], 1024);
 507                         }
 508                         fclose($pipes[1]);
 509                         $return_value = proc_close($process);
 510                 }
 511
 512                 wfProfileOut( $fname );
 513
 514                 if( $cleansource == '' && $text != '') {
 515                         wfDebug( "Tidy error detected!\n" );
 516                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 517                 } else {
 518                         return $cleansource;
 519                 }
 520         }
 521
 522         /**
 523          * parse the wiki syntax used to render tables
 524          *
 525          * @access private
 526          */
 527         function doTableStuff ( $t ) {
 528                 $fname = 'Parser::doTableStuff';
 529                 wfProfileIn( $fname );
 530
 531                 $t = explode ( "\n" , $t ) ;
 532                 $td = array () ; # Is currently a td tag open?
 533                 $ltd = array () ; # Was it TD or TH?
 534                 $tr = array () ; # Is currently a tr tag open?
 535                 $ltr = array () ; # tr attributes
 536                 $indent_level = 0; # indent level of the table
 537                 foreach ( $t AS $k => $x )
 538                 {
 539                         $x = trim ( $x ) ;
 540                         $fc = substr ( $x , 0 , 1 ) ;
 541                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 542                                 $indent_level = strlen( $matches[1] );
 543                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 544                                         '<table' . Sanitizer::fixTagAttributes ( $matches[2], 'table' ) . '>' ;
 545                                 array_push ( $td , false ) ;
 546                                 array_push ( $ltd , '' ) ;
 547                                 array_push ( $tr , false ) ;
 548                                 array_push ( $ltr , '' ) ;
 549                         }
 550                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 551                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 552                                 $z = "</table>" . substr ( $x , 2);
 553                                 $l = array_pop ( $ltd ) ;
 554                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 555                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 556                                 array_pop ( $ltr ) ;
 557                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 558                         }
 559                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 560                                 $x = substr ( $x , 1 ) ;
 561                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 562                                 $z = '' ;
 563                                 $l = array_pop ( $ltd ) ;
 564                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 565                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 566                                 array_pop ( $ltr ) ;
 567                                 $t[$k] = $z ;
 568                                 array_push ( $tr , false ) ;
 569                                 array_push ( $td , false ) ;
 570                                 array_push ( $ltd , '' ) ;
 571                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $x, 'tr' ) ) ;
 572                         }
 573                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 574                                 # $x is a table row
 575                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 576                                         $fc = '+' ;
 577                                         $x = substr ( $x , 1 ) ;
 578                                 }
 579                                 $after = substr ( $x , 1 ) ;
 580                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 581                                 $after = explode ( '||' , $after ) ;
 582                                 $t[$k] = '' ;
 583
 584                                 # Loop through each table cell
 585                                 foreach ( $after AS $theline )
 586                                 {
 587                                         $z = '' ;
 588                                         if ( $fc != '+' )
 589                                         {
 590                                                 $tra = array_pop ( $ltr ) ;
 591                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 592                                                 array_push ( $tr , true ) ;
 593                                                 array_push ( $ltr , '' ) ;
 594                                         }
 595
 596                                         $l = array_pop ( $ltd ) ;
 597                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 598                                         if ( $fc == '|' ) $l = 'td' ;
 599                                         else if ( $fc == '!' ) $l = 'th' ;
 600                                         else if ( $fc == '+' ) $l = 'caption' ;
 601                                         else $l = '' ;
 602                                         array_push ( $ltd , $l ) ;
 603
 604                                         # Cell parameters
 605                                         $y = explode ( '|' , $theline , 2 ) ;
 606                                         # Note that a '|' inside an invalid link should not
 607                                         # be mistaken as delimiting cell parameters
 608                                         if ( strpos( $y[0], '[[' ) !== false ) {
 609                                                 $y = array ($theline);
 610                                         }
 611                                         if ( count ( $y ) == 1 )
 612                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 613                                         else $y = $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($y[0], $l).">{$y[1]}" ;
 614                                         $t[$k] .= $y ;
 615                                         array_push ( $td , true ) ;
 616                                 }
 617                         }
 618                 }
 619
 620                 # Closing open td, tr && table
 621                 while ( count ( $td ) > 0 )
 622                 {
 623                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 624                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 625                         $t[] = '</table>' ;
 626                 }
 627
 628                 $t = implode ( "\n" , $t ) ;
 629                 #               $t = Sanitizer::removeHTMLtags( $t );
 630                 wfProfileOut( $fname );
 631                 return $t ;
 632         }
 633
 634         /**
 635          * Helper function for parse() that transforms wiki markup into
 636          * HTML. Only called for $mOutputType == OT_HTML.
 637          *
 638          * @access private
 639          */
 640         function internalParse( $text, $linestart, $args = array(), $isMain=true ) {
 641                 global $wgContLang;
 642
 643                 $fname = 'Parser::internalParse';
 644                 wfProfileIn( $fname );
 645
 646                 $text = Sanitizer::removeHTMLtags( $text );
 647                 $text = $this->replaceVariables( $text, $args );
 648
 649                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 650
 651                 $text = $this->doHeadings( $text );
 652                 if($this->mOptions->getUseDynamicDates()) {
 653                         global $wgDateFormatter;
 654                         $text = $wgDateFormatter->reformat( $this->mOptions->getDateFormat(), $text );
 655                 }
 656                 $text = $this->doAllQuotes( $text );
 657                 $text = $this->replaceInternalLinks( $text );
 658                 $text = $this->replaceExternalLinks( $text );
 659
 660                 # replaceInternalLinks may sometimes leave behind
 661                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 662                 $text = str_replace("http-noparse://","http://",$text);
 663
 664                 $text = $this->doMagicLinks( $text );
 665                 $text = $this->doTableStuff( $text );
 666                 $text = $this->formatHeadings( $text, $isMain );
 667
 668                 wfProfileOut( $fname );
 669                 return $text;
 670         }
 671
 672         /**
 673          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 674          * magic external links.
 675          *
 676          * @access private
 677          */
 678         function &doMagicLinks( &$text ) {
 679                 $text = $this->magicISBN( $text );
 680                 $text = $this->magicRFC( $text, 'RFC ', 'rfcurl' );
 681                 $text = $this->magicRFC( $text, 'PMID ', 'pubmedurl' );
 682                 return $text;
 683         }
 684
 685         /**
 686          * Parse ^^ tokens and return html
 687          *
 688          * @access private
 689          */
 690         function doExponent( $text ) {
 691                 $fname = 'Parser::doExponent';
 692                 wfProfileIn( $fname );
 693                 $text = preg_replace('/\^\^(.*)\^\^/','<small><sup>\\1</sup></small>', $text);
 694                 wfProfileOut( $fname );
 695                 return $text;
 696         }
 697
 698         /**
 699          * Parse headers and return html
 700          *
 701          * @access private
 702          */
 703         function doHeadings( $text ) {
 704                 $fname = 'Parser::doHeadings';
 705                 wfProfileIn( $fname );
 706                 for ( $i = 6; $i >= 1; --$i ) {
 707                         $h = substr( '======', 0, $i );
 708                         $text = preg_replace( "/^{$h}(.+){$h}(\\s|$)/m",
 709                           "<h{$i}>\\1</h{$i}>\\2", $text );
 710                 }
 711                 wfProfileOut( $fname );
 712                 return $text;
 713         }
 714
 715         /**
 716          * Replace single quotes with HTML markup
 717          * @access private
 718          * @return string the altered text
 719          */
 720         function doAllQuotes( $text ) {
 721                 $fname = 'Parser::doAllQuotes';
 722                 wfProfileIn( $fname );
 723                 $outtext = '';
 724                 $lines = explode( "\n", $text );
 725                 foreach ( $lines as $line ) {
 726                         $outtext .= $this->doQuotes ( $line ) . "\n";
 727                 }
 728                 $outtext = substr($outtext, 0,-1);
 729                 wfProfileOut( $fname );
 730                 return $outtext;
 731         }
 732
 733         /**
 734          * Helper function for doAllQuotes()
 735          * @access private
 736          */
 737         function doQuotes( $text ) {
 738                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 739                 if ( count( $arr ) == 1 )
 740                         return $text;
 741                 else
 742                 {
 743                         # First, do some preliminary work. This may shift some apostrophes from
 744                         # being mark-up to being text. It also counts the number of occurrences
 745                         # of bold and italics mark-ups.
 746                         $i = 0;
 747                         $numbold = 0;
 748                         $numitalics = 0;
 749                         foreach ( $arr as $r )
 750                         {
 751                                 if ( ( $i % 2 ) == 1 )
 752                                 {
 753                                         # If there are ever four apostrophes, assume the first is supposed to
 754                                         # be text, and the remaining three constitute mark-up for bold text.
 755                                         if ( strlen( $arr[$i] ) == 4 )
 756                                         {
 757                                                 $arr[$i-1] .= "'";
 758                                                 $arr[$i] = "'''";
 759                                         }
 760                                         # If there are more than 5 apostrophes in a row, assume they're all
 761                                         # text except for the last 5.
 762                                         else if ( strlen( $arr[$i] ) > 5 )
 763                                         {
 764                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
 765                                                 $arr[$i] = "'''''";
 766                                         }
 767                                         # Count the number of occurrences of bold and italics mark-ups.
 768                                         # We are not counting sequences of five apostrophes.
 769                                         if ( strlen( $arr[$i] ) == 2 ) $numitalics++;  else
 770                                         if ( strlen( $arr[$i] ) == 3 ) $numbold++;     else
 771                                         if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
 772                                 }
 773                                 $i++;
 774                         }
 775
 776                         # If there is an odd number of both bold and italics, it is likely
 777                         # that one of the bold ones was meant to be an apostrophe followed
 778                         # by italics. Which one we cannot know for certain, but it is more
 779                         # likely to be one that has a single-letter word before it.
 780                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
 781                         {
 782                                 $i = 0;
 783                                 $firstsingleletterword = -1;
 784                                 $firstmultiletterword = -1;
 785                                 $firstspace = -1;
 786                                 foreach ( $arr as $r )
 787                                 {
 788                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
 789                                         {
 790                                                 $x1 = substr ($arr[$i-1], -1);
 791                                                 $x2 = substr ($arr[$i-1], -2, 1);
 792                                                 if ($x1 == ' ') {
 793                                                         if ($firstspace == -1) $firstspace = $i;
 794                                                 } else if ($x2 == ' ') {
 795                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
 796                                                 } else {
 797                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
 798                                                 }
 799                                         }
 800                                         $i++;
 801                                 }
 802
 803                                 # If there is a single-letter word, use it!
 804                                 if ($firstsingleletterword > -1)
 805                                 {
 806                                         $arr [ $firstsingleletterword ] = "''";
 807                                         $arr [ $firstsingleletterword-1 ] .= "'";
 808                                 }
 809                                 # If not, but there's a multi-letter word, use that one.
 810                                 else if ($firstmultiletterword > -1)
 811                                 {
 812                                         $arr [ $firstmultiletterword ] = "''";
 813                                         $arr [ $firstmultiletterword-1 ] .= "'";
 814                                 }
 815                                 # ... otherwise use the first one that has neither.
 816                                 # (notice that it is possible for all three to be -1 if, for example,
 817                                 # there is only one pentuple-apostrophe in the line)
 818                                 else if ($firstspace > -1)
 819                                 {
 820                                         $arr [ $firstspace ] = "''";
 821                                         $arr [ $firstspace-1 ] .= "'";
 822                                 }
 823                         }
 824
 825                         # Now let's actually convert our apostrophic mush to HTML!
 826                         $output = '';
 827                         $buffer = '';
 828                         $state = '';
 829                         $i = 0;
 830                         foreach ($arr as $r)
 831                         {
 832                                 if (($i % 2) == 0)
 833                                 {
 834                                         if ($state == 'both')
 835                                                 $buffer .= $r;
 836                                         else
 837                                                 $output .= $r;
 838                                 }
 839                                 else
 840                                 {
 841                                         if (strlen ($r) == 2)
 842                                         {
 843                                                 if ($state == 'i')
 844                                                 { $output .= '</i>'; $state = ''; }
 845                                                 else if ($state == 'bi')
 846                                                 { $output .= '</i>'; $state = 'b'; }
 847                                                 else if ($state == 'ib')
 848                                                 { $output .= '</b></i><b>'; $state = 'b'; }
 849                                                 else if ($state == 'both')
 850                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
 851                                                 else # $state can be 'b' or ''
 852                                                 { $output .= '<i>'; $state .= 'i'; }
 853                                         }
 854                                         else if (strlen ($r) == 3)
 855                                         {
 856                                                 if ($state == 'b')
 857                                                 { $output .= '</b>'; $state = ''; }
 858                                                 else if ($state == 'bi')
 859                                                 { $output .= '</i></b><i>'; $state = 'i'; }
 860                                                 else if ($state == 'ib')
 861                                                 { $output .= '</b>'; $state = 'i'; }
 862                                                 else if ($state == 'both')
 863                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
 864                                                 else # $state can be 'i' or ''
 865                                                 { $output .= '<b>'; $state .= 'b'; }
 866                                         }
 867                                         else if (strlen ($r) == 5)
 868                                         {
 869                                                 if ($state == 'b')
 870                                                 { $output .= '</b><i>'; $state = 'i'; }
 871                                                 else if ($state == 'i')
 872                                                 { $output .= '</i><b>'; $state = 'b'; }
 873                                                 else if ($state == 'bi')
 874                                                 { $output .= '</i></b>'; $state = ''; }
 875                                                 else if ($state == 'ib')
 876                                                 { $output .= '</b></i>'; $state = ''; }
 877                                                 else if ($state == 'both')
 878                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
 879                                                 else # ($state == '')
 880                                                 { $buffer = ''; $state = 'both'; }
 881                                         }
 882                                 }
 883                                 $i++;
 884                         }
 885                         # Now close all remaining tags.  Notice that the order is important.
 886                         if ($state == 'b' || $state == 'ib')
 887                                 $output .= '</b>';
 888                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
 889                                 $output .= '</i>';
 890                         if ($state == 'bi')
 891                                 $output .= '</b>';
 892                         if ($state == 'both')
 893                                 $output .= '<b><i>'.$buffer.'</i></b>';
 894                         return $output;
 895                 }
 896         }
 897
 898         /**
 899          * Replace external links
 900          *
 901          * Note: this is all very hackish and the order of execution matters a lot.
 902          * Make sure to run maintenance/parserTests.php if you change this code.
 903          *
 904          * @access private
 905          */
 906         function replaceExternalLinks( $text ) {
 907                 $fname = 'Parser::replaceExternalLinks';
 908                 wfProfileIn( $fname );
 909
 910                 $sk =& $this->mOptions->getSkin();
 911                 global $wgContLang;
 912                 $linktrail = $wgContLang->linkTrail();
 913
 914                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 915
 916                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
 917
 918                 $i = 0;
 919                 while ( $i<count( $bits ) ) {
 920                         $url = $bits[$i++];
 921                         $protocol = $bits[$i++];
 922                         $text = $bits[$i++];
 923                         $trail = $bits[$i++];
 924
 925                         # The characters '<' and '>' (which were escaped by
 926                         # removeHTMLtags()) should not be included in
 927                         # URLs, per RFC 2396.
 928                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
 929                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
 930                                 $url = substr($url, 0, $m2[0][1]);
 931                         }
 932
 933                         # If the link text is an image URL, replace it with an <img> tag
 934                         # This happened by accident in the original parser, but some people used it extensively
 935                         $img = $this->maybeMakeImageLink( $text );
 936                         if ( $img !== false ) {
 937                                 $text = $img;
 938                         }
 939
 940                         $dtrail = '';
 941
 942                         # Set linktype for CSS - if URL==text, link is essentially free
 943                         $linktype = ($text == $url) ? 'free' : 'text';
 944
 945                         # No link text, e.g. [http://domain.tld/some.link]
 946                         if ( $text == '' ) {
 947                                 # Autonumber if allowed
 948                                 if ( strpos( HTTP_PROTOCOLS, $protocol ) !== false ) {
 949                                         $text = '[' . ++$this->mAutonumber . ']';
 950                                         $linktype = 'autonumber';
 951                                 } else {
 952                                         # Otherwise just use the URL
 953                                         $text = htmlspecialchars( $url );
 954                                         $linktype = 'free';
 955                                 }
 956                         } else {
 957                                 # Have link text, e.g. [http://domain.tld/some.link text]s
 958                                 # Check for trail
 959                                 if ( preg_match( $linktrail, $trail, $m2 ) ) {
 960                                         $dtrail = $m2[1];
 961                                         $trail = $m2[2];
 962                                 }
 963                         }
 964
 965                         # Replace &amp; from obsolete syntax with &.
 966                         # All HTML entities will be escaped by makeExternalLink()
 967                         # or maybeMakeImageLink()
 968                         $url = str_replace( '&amp;', '&', $url );
 969
 970                         # Process the trail (i.e. everything after this link up until start of the next link),
 971                         # replacing any non-bracketed links
 972                         $trail = $this->replaceFreeExternalLinks( $trail );
 973
 974                         # Use the encoded URL
 975                         # This means that users can paste URLs directly into the text
 976                         # Funny characters like &ouml; aren't valid in URLs anyway
 977                         # This was changed in August 2004
 978                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype ) . $dtrail . $trail;
 979                 }
 980
 981                 wfProfileOut( $fname );
 982                 return $s;
 983         }
 984
 985         /**
 986          * Replace anything that looks like a URL with a link
 987          * @access private
 988          */
 989         function replaceFreeExternalLinks( $text ) {
 990                 $fname = 'Parser::replaceFreeExternalLinks';
 991                 wfProfileIn( $fname );
 992
 993                 $bits = preg_split( '/(\b(?:'.URL_PROTOCOLS.'):)/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 994                 $s = array_shift( $bits );
 995                 $i = 0;
 996
 997                 $sk =& $this->mOptions->getSkin();
 998
 999                 while ( $i < count( $bits ) ){
1000                         $protocol = $bits[$i++];
1001                         $remainder = $bits[$i++];
1002
1003                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1004                                 # Found some characters after the protocol that look promising
1005                                 $url = $protocol . $m[1];
1006                                 $trail = $m[2];
1007
1008                                 # The characters '<' and '>' (which were escaped by
1009                                 # removeHTMLtags()) should not be included in
1010                                 # URLs, per RFC 2396.
1011                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1012                                         $trail = substr($url, $m2[0][1]) . $trail;
1013                                         $url = substr($url, 0, $m2[0][1]);
1014                                 }
1015
1016                                 # Move trailing punctuation to $trail
1017                                 $sep = ',;\.:!?';
1018                                 # If there is no left bracket, then consider right brackets fair game too
1019                                 if ( strpos( $url, '(' ) === false ) {
1020                                         $sep .= ')';
1021                                 }
1022
1023                                 $numSepChars = strspn( strrev( $url ), $sep );
1024                                 if ( $numSepChars ) {
1025                                         $trail = substr( $url, -$numSepChars ) . $trail;
1026                                         $url = substr( $url, 0, -$numSepChars );
1027                                 }
1028
1029                                 # Replace &amp; from obsolete syntax with &.
1030                                 # All HTML entities will be escaped by makeExternalLink()
1031                                 # or maybeMakeImageLink()
1032                                 $url = str_replace( '&amp;', '&', $url );
1033
1034                                 # Is this an external image?
1035                                 $text = $this->maybeMakeImageLink( $url );
1036                                 if ( $text === false ) {
1037                                         # Not an image, make a link
1038                                         $text = $sk->makeExternalLink( $url, $url, true, 'free' );
1039                                 }
1040                                 $s .= $text . $trail;
1041                         } else {
1042                                 $s .= $protocol . $remainder;
1043                         }
1044                 }
1045                 wfProfileOut();
1046                 return $s;
1047         }
1048
1049         /**
1050          * make an image if it's allowed
1051          * @access private
1052          */
1053         function maybeMakeImageLink( $url ) {
1054                 $sk =& $this->mOptions->getSkin();
1055                 $text = false;
1056                 if ( $this->mOptions->getAllowExternalImages() ) {
1057                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1058                                 # Image found
1059                                 $text = $sk->makeImage( htmlspecialchars( $url ) );
1060                         }
1061                 }
1062                 return $text;
1063         }
1064
1065         /**
1066          * Process [[ ]] wikilinks
1067          *
1068          * @access private
1069          */
1070         function replaceInternalLinks( $s ) {
1071                 global $wgLang, $wgContLang, $wgLinkCache;
1072                 global $wgDisableLangConversion;
1073                 static $fname = 'Parser::replaceInternalLinks' ;
1074
1075                 wfProfileIn( $fname );
1076
1077                 wfProfileIn( $fname.'-setup' );
1078                 static $tc = FALSE;
1079                 # the % is needed to support urlencoded titles as well
1080                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1081
1082                 $sk =& $this->mOptions->getSkin();
1083                 global $wgUseOldExistenceCheck;
1084                 # "Post-parse link colour check" works only on wiki text since it's now
1085                 # in Parser. Enable it, then disable it when we're done.
1086                 $saveParseColour = $sk->postParseLinkColour( !$wgUseOldExistenceCheck );
1087
1088                 $redirect = MagicWord::get ( MAG_REDIRECT ) ;
1089
1090                 #split the entire text string on occurences of [[
1091                 $a = explode( '[[', ' ' . $s );
1092                 #get the first element (all text up to first [[), and remove the space we added
1093                 $s = array_shift( $a );
1094                 $s = substr( $s, 1 );
1095
1096                 # Match a link having the form [[namespace:link|alternate]]trail
1097                 static $e1 = FALSE;
1098                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1099                 # Match cases where there is no "]]", which might still be images
1100                 static $e1_img = FALSE;
1101                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1102                 # Match the end of a line for a word that's not followed by whitespace,
1103                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1104                 static $e2 = '/^(.*?)([a-zA-Z\x80-\xff]+)$/sD';
1105
1106                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1107
1108                 if( is_null( $this->mTitle ) ) {
1109                         wfDebugDieBacktrace( 'nooo' );
1110                 }
1111                 $nottalk = !$this->mTitle->isTalkPage();
1112
1113                 if ( $useLinkPrefixExtension ) {
1114                         if ( preg_match( $e2, $s, $m ) ) {
1115                                 $first_prefix = $m[2];
1116                                 $s = $m[1];
1117                         } else {
1118                                 $first_prefix = false;
1119                         }
1120                 } else {
1121                         $prefix = '';
1122                 }
1123
1124                 $selflink = $this->mTitle->getPrefixedText();
1125                 wfProfileOut( $fname.'-setup' );
1126
1127                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
1128                 $useSubpages = $this->areSubpagesAllowed();
1129
1130                 # Loop for each link
1131                 for ($k = 0; isset( $a[$k] ); $k++) {
1132                         $line = $a[$k];
1133                         if ( $useLinkPrefixExtension ) {
1134                                 wfProfileIn( $fname.'-prefixhandling' );
1135                                 if ( preg_match( $e2, $s, $m ) ) {
1136                                         $prefix = $m[2];
1137                                         $s = $m[1];
1138                                 } else {
1139                                         $prefix='';
1140                                 }
1141                                 # first link
1142                                 if($first_prefix) {
1143                                         $prefix = $first_prefix;
1144                                         $first_prefix = false;
1145                                 }
1146                                 wfProfileOut( $fname.'-prefixhandling' );
1147                         }
1148
1149                         $might_be_img = false;
1150
1151                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1152                                 $text = $m[2];
1153                                 # fix up urlencoded title texts
1154                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1155                                 $trail = $m[3];
1156                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1157                                 $might_be_img = true;
1158                                 $text = $m[2];
1159                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1160                                 $trail = "";
1161                         } else { # Invalid form; output directly
1162                                 $s .= $prefix . '[[' . $line ;
1163                                 continue;
1164                         }
1165
1166                         # Don't allow internal links to pages containing
1167                         # PROTO: where PROTO is a valid URL protocol; these
1168                         # should be external links.
1169                         if (preg_match('/^(\b(?:'.URL_PROTOCOLS.'):)/', $m[1])) {
1170                                 $s .= $prefix . '[[' . $line ;
1171                                 continue;
1172                         }
1173
1174                         # Make subpage if necessary
1175                         if( $useSubpages ) {
1176                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1177                         } else {
1178                                 $link = $m[1];
1179                         }
1180
1181                         $noforce = (substr($m[1], 0, 1) != ':');
1182                         if (!$noforce) {
1183                                 # Strip off leading ':'
1184                                 $link = substr($link, 1);
1185                         }
1186
1187                         $nt =& Title::newFromText( $this->unstripNoWiki($link, $this->mStripState) );
1188                         if( !$nt ) {
1189                                 $s .= $prefix . '[[' . $line;
1190                                 continue;
1191                         }
1192
1193                         #check other language variants of the link
1194                         #if the article does not exist
1195                         if( $checkVariantLink
1196                             && $nt->getArticleID() == 0 ) {
1197                                 $wgContLang->findVariantLink($link, $nt);
1198                         }
1199
1200                         $ns = $nt->getNamespace();
1201                         $iw = $nt->getInterWiki();
1202
1203                         if ($might_be_img) { # if this is actually an invalid link
1204                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1205                                         $found = false;
1206                                         while (isset ($a[$k+1]) ) {
1207                                                 #look at the next 'line' to see if we can close it there
1208                                                 $next_line =  array_shift(array_splice( $a, $k + 1, 1) );
1209                                                 if( preg_match("/^(.*?]].*?)]](.*)$/sD", $next_line, $m) ) {
1210                                                 # the first ]] closes the inner link, the second the image
1211                                                         $found = true;
1212                                                         $text .= '[[' . $m[1];
1213                                                         $trail = $m[2];
1214                                                         break;
1215                                                 } elseif( preg_match("/^.*?]].*$/sD", $next_line, $m) ) {
1216                                                         #if there's exactly one ]] that's fine, we'll keep looking
1217                                                         $text .= '[[' . $m[0];
1218                                                 } else {
1219                                                         #if $next_line is invalid too, we need look no further
1220                                                         $text .= '[[' . $next_line;
1221                                                         break;
1222                                                 }
1223                                         }
1224                                         if ( !$found ) {
1225                                                 # we couldn't find the end of this imageLink, so output it raw
1226                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1227                                                 $text = $this->replaceInternalLinks($text);
1228                                                 $s .= $prefix . '[[' . $link . '|' . $text;
1229                                                 # note: no $trail, because without an end, there *is* no trail
1230                                                 continue;
1231                                         }
1232                                 } else { #it's not an image, so output it raw
1233                                         $s .= $prefix . '[[' . $link . '|' . $text;
1234                                         # note: no $trail, because without an end, there *is* no trail
1235                                         continue;
1236                                 }
1237                         }
1238
1239                         $wasblank = ( '' == $text );
1240                         if( $wasblank ) $text = $link;
1241
1242
1243                         # Link not escaped by : , create the various objects
1244                         if( $noforce ) {
1245
1246                                 # Interwikis
1247                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1248                                         array_push( $this->mOutput->mLanguageLinks, $nt->getFullText() );
1249                                         $tmp = $prefix . $trail ;
1250                                         $s .= (trim($tmp) == '')? '': $tmp;
1251                                         continue;
1252                                 }
1253
1254                                 if ( $ns == NS_IMAGE ) {
1255                                         wfProfileIn( "$fname-image" );
1256
1257                                         # recursively parse links inside the image caption
1258                                         # actually, this will parse them in any other parameters, too,
1259                                         # but it might be hard to fix that, and it doesn't matter ATM
1260                                         $text = $this->replaceExternalLinks($text);
1261                                         $text = $this->replaceInternalLinks($text);
1262
1263                                         # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1264                                         $s .= $prefix . str_replace('http://', 'http-noparse://', $sk->makeImageLinkObj( $nt, $text ) ) . $trail;
1265                                         $wgLinkCache->addImageLinkObj( $nt );
1266
1267                                         wfProfileOut( "$fname-image" );
1268                                         continue;
1269                                 }
1270
1271                                 if ( $ns == NS_CATEGORY ) {
1272                                         wfProfileIn( "$fname-category" );
1273                                         $t = $nt->getText();
1274
1275                                         $wgLinkCache->suspend(); # Don't save in links/brokenlinks
1276                                         $pPLC=$sk->postParseLinkColour();
1277                                         $sk->postParseLinkColour( false );
1278                                         $t = $sk->makeLinkObj( $nt, $t, '', '' , $prefix );
1279                                         $sk->postParseLinkColour( $pPLC );
1280                                         $wgLinkCache->resume();
1281
1282                                         if ( $wasblank ) {
1283                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1284                                                         $sortkey = $this->mTitle->getText();
1285                                                 } else {
1286                                                         $sortkey = $this->mTitle->getPrefixedText();
1287                                                 }
1288                                         } else {
1289                                                 $sortkey = $text;
1290                                         }
1291                                         $wgLinkCache->addCategoryLinkObj( $nt, $sortkey );
1292                                         $this->mOutput->addCategoryLink( $t );
1293
1294                                         /**
1295                                          * Strip the whitespace Category links produce, see bug 87
1296                                          * @todo We might want to use trim($tmp, "\n") here.
1297                                          */
1298                                         $tmp = $prefix . $trail;
1299                                         $s .= trim($tmp) == '' ? '': $tmp;
1300
1301                                         wfProfileOut( "$fname-category" );
1302                                         continue;
1303                                 }
1304                         }
1305
1306                         if( ( $nt->getPrefixedText() === $selflink ) &&
1307                             ( $nt->getFragment() === '' ) ) {
1308                                 # Self-links are handled specially; generally de-link and change to bold.
1309                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1310                                 continue;
1311                         }
1312
1313                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1314                         if( $ns == NS_MEDIA ) {
1315                                 $s .= $prefix . $sk->makeMediaLinkObj( $nt, $text, true ) . $trail;
1316                                 $wgLinkCache->addImageLinkObj( $nt );
1317                                 continue;
1318                         } elseif( $ns == NS_SPECIAL ) {
1319                                 $s .= $prefix . $sk->makeKnownLinkObj( $nt, $text, '', $trail );
1320                                 continue;
1321                         }
1322                         $s .= $sk->makeLinkObj( $nt, $text, '', $trail, $prefix );
1323                 }
1324                 $sk->postParseLinkColour( $saveParseColour );
1325                 wfProfileOut( $fname );
1326                 return $s;
1327         }
1328
1329         /**
1330          * Return true if subpage links should be expanded on this page.
1331          * @return bool
1332          */
1333         function areSubpagesAllowed() {
1334                 # Some namespaces don't allow subpages
1335                 global $wgNamespacesWithSubpages;
1336                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1337         }
1338
1339         /**
1340          * Handle link to subpage if necessary
1341          * @param string $target the source of the link
1342          * @param string &$text the link text, modified as necessary
1343          * @return string the full name of the link
1344          * @access private
1345          */
1346         function maybeDoSubpageLink($target, &$text) {
1347                 # Valid link forms:
1348                 # Foobar -- normal
1349                 # :Foobar -- override special treatment of prefix (images, language links)
1350                 # /Foobar -- convert to CurrentPage/Foobar
1351                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1352                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1353                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1354
1355                 $fname = 'Parser::maybeDoSubpageLink';
1356                 wfProfileIn( $fname );
1357                 $ret = $target; # default return value is no change
1358
1359                 # Some namespaces don't allow subpages,
1360                 # so only perform processing if subpages are allowed
1361                 if( $this->areSubpagesAllowed() ) {
1362                         # Look at the first character
1363                         if( $target != '' && $target{0} == '/' ) {
1364                                 # / at end means we don't want the slash to be shown
1365                                 if( substr( $target, -1, 1 ) == '/' ) {
1366                                         $target = substr( $target, 1, -1 );
1367                                         $noslash = $target;
1368                                 } else {
1369                                         $noslash = substr( $target, 1 );
1370                                 }
1371
1372                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1373                                 if( '' === $text ) {
1374                                         $text = $target;
1375                                 } # this might be changed for ugliness reasons
1376                         } else {
1377                                 # check for .. subpage backlinks
1378                                 $dotdotcount = 0;
1379                                 $nodotdot = $target;
1380                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1381                                         ++$dotdotcount;
1382                                         $nodotdot = substr( $nodotdot, 3 );
1383                                 }
1384                                 if($dotdotcount > 0) {
1385                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1386                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1387                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1388                                                 # / at the end means don't show full path
1389                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1390                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1391                                                         if( '' === $text ) {
1392                                                                 $text = $nodotdot;
1393                                                         }
1394                                                 }
1395                                                 $nodotdot = trim( $nodotdot );
1396                                                 if( $nodotdot != '' ) {
1397                                                         $ret .= '/' . $nodotdot;
1398                                                 }
1399                                         }
1400                                 }
1401                         }
1402                 }
1403
1404                 wfProfileOut( $fname );
1405                 return $ret;
1406         }
1407
1408         /**#@+
1409          * Used by doBlockLevels()
1410          * @access private
1411          */
1412         /* private */ function closeParagraph() {
1413                 $result = '';
1414                 if ( '' != $this->mLastSection ) {
1415                         $result = '</' . $this->mLastSection  . ">\n";
1416                 }
1417                 $this->mInPre = false;
1418                 $this->mLastSection = '';
1419                 return $result;
1420         }
1421         # getCommon() returns the length of the longest common substring
1422         # of both arguments, starting at the beginning of both.
1423         #
1424         /* private */ function getCommon( $st1, $st2 ) {
1425                 $fl = strlen( $st1 );
1426                 $shorter = strlen( $st2 );
1427                 if ( $fl < $shorter ) { $shorter = $fl; }
1428
1429                 for ( $i = 0; $i < $shorter; ++$i ) {
1430                         if ( $st1{$i} != $st2{$i} ) { break; }
1431                 }
1432                 return $i;
1433         }
1434         # These next three functions open, continue, and close the list
1435         # element appropriate to the prefix character passed into them.
1436         #
1437         /* private */ function openList( $char ) {
1438                 $result = $this->closeParagraph();
1439
1440                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1441                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1442                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1443                 else if ( ';' == $char ) {
1444                         $result .= '<dl><dt>';
1445                         $this->mDTopen = true;
1446                 }
1447                 else { $result = '<!-- ERR 1 -->'; }
1448
1449                 return $result;
1450         }
1451
1452         /* private */ function nextItem( $char ) {
1453                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1454                 else if ( ':' == $char || ';' == $char ) {
1455                         $close = '</dd>';
1456                         if ( $this->mDTopen ) { $close = '</dt>'; }
1457                         if ( ';' == $char ) {
1458                                 $this->mDTopen = true;
1459                                 return $close . '<dt>';
1460                         } else {
1461                                 $this->mDTopen = false;
1462                                 return $close . '<dd>';
1463                         }
1464                 }
1465                 return '<!-- ERR 2 -->';
1466         }
1467
1468         /* private */ function closeList( $char ) {
1469                 if ( '*' == $char ) { $text = '</li></ul>'; }
1470                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1471                 else if ( ':' == $char ) {
1472                         if ( $this->mDTopen ) {
1473                                 $this->mDTopen = false;
1474                                 $text = '</dt></dl>';
1475                         } else {
1476                                 $text = '</dd></dl>';
1477                         }
1478                 }
1479                 else {  return '<!-- ERR 3 -->'; }
1480                 return $text."\n";
1481         }
1482         /**#@-*/
1483
1484         /**
1485          * Make lists from lines starting with ':', '*', '#', etc.
1486          *
1487          * @access private
1488          * @return string the lists rendered as HTML
1489          */
1490         function doBlockLevels( $text, $linestart ) {
1491                 $fname = 'Parser::doBlockLevels';
1492                 wfProfileIn( $fname );
1493
1494                 # Parsing through the text line by line.  The main thing
1495                 # happening here is handling of block-level elements p, pre,
1496                 # and making lists from lines starting with * # : etc.
1497                 #
1498                 $textLines = explode( "\n", $text );
1499
1500                 $lastPrefix = $output = $lastLine = '';
1501                 $this->mDTopen = $inBlockElem = false;
1502                 $prefixLength = 0;
1503                 $paragraphStack = false;
1504
1505                 if ( !$linestart ) {
1506                         $output .= array_shift( $textLines );
1507                 }
1508                 foreach ( $textLines as $oLine ) {
1509                         $lastPrefixLength = strlen( $lastPrefix );
1510                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
1511                         $preOpenMatch = preg_match('/<pre/i', $oLine );
1512                         if ( !$this->mInPre ) {
1513                                 # Multiple prefixes may abut each other for nested lists.
1514                                 $prefixLength = strspn( $oLine, '*#:;' );
1515                                 $pref = substr( $oLine, 0, $prefixLength );
1516
1517                                 # eh?
1518                                 $pref2 = str_replace( ';', ':', $pref );
1519                                 $t = substr( $oLine, $prefixLength );
1520                                 $this->mInPre = !empty($preOpenMatch);
1521                         } else {
1522                                 # Don't interpret any other prefixes in preformatted text
1523                                 $prefixLength = 0;
1524                                 $pref = $pref2 = '';
1525                                 $t = $oLine;
1526                         }
1527
1528                         # List generation
1529                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
1530                                 # Same as the last item, so no need to deal with nesting or opening stuff
1531                                 $output .= $this->nextItem( substr( $pref, -1 ) );
1532                                 $paragraphStack = false;
1533
1534                                 if ( substr( $pref, -1 ) == ';') {
1535                                         # The one nasty exception: definition lists work like this:
1536                                         # ; title : definition text
1537                                         # So we check for : in the remainder text to split up the
1538                                         # title and definition, without b0rking links.
1539                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1540                                                 $t = $t2;
1541                                                 $output .= $term . $this->nextItem( ':' );
1542                                         }
1543                                 }
1544                         } elseif( $prefixLength || $lastPrefixLength ) {
1545                                 # Either open or close a level...
1546                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
1547                                 $paragraphStack = false;
1548
1549                                 while( $commonPrefixLength < $lastPrefixLength ) {
1550                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
1551                                         --$lastPrefixLength;
1552                                 }
1553                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
1554                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
1555                                 }
1556                                 while ( $prefixLength > $commonPrefixLength ) {
1557                                         $char = substr( $pref, $commonPrefixLength, 1 );
1558                                         $output .= $this->openList( $char );
1559
1560                                         if ( ';' == $char ) {
1561                                                 # FIXME: This is dupe of code above
1562                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1563                                                         $t = $t2;
1564                                                         $output .= $term . $this->nextItem( ':' );
1565                                                 }
1566                                         }
1567                                         ++$commonPrefixLength;
1568                                 }
1569                                 $lastPrefix = $pref2;
1570                         }
1571                         if( 0 == $prefixLength ) {
1572                                 wfProfileIn( "$fname-paragraph" );
1573                                 # No prefix (not in list)--go to paragraph mode
1574                                 $uniq_prefix = UNIQ_PREFIX;
1575                                 // XXX: use a stack for nestable elements like span, table and div
1576                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<li|<\\/tr|<\\/td|<\\/th)/iS', $t );
1577                                 $closematch = preg_match(
1578                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
1579                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$uniq_prefix.'-pre|<\\/li|<\\/ul)/iS', $t );
1580                                 if ( $openmatch or $closematch ) {
1581                                         $paragraphStack = false;
1582                                         $output .= $this->closeParagraph();
1583                                         if($preOpenMatch and !$preCloseMatch) {
1584                                                 $this->mInPre = true;
1585                                         }
1586                                         if ( $closematch ) {
1587                                                 $inBlockElem = false;
1588                                         } else {
1589                                                 $inBlockElem = true;
1590                                         }
1591                                 } else if ( !$inBlockElem && !$this->mInPre ) {
1592                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
1593                                                 // pre
1594                                                 if ($this->mLastSection != 'pre') {
1595                                                         $paragraphStack = false;
1596                                                         $output .= $this->closeParagraph().'<pre>';
1597                                                         $this->mLastSection = 'pre';
1598                                                 }
1599                                                 $t = substr( $t, 1 );
1600                                         } else {
1601                                                 // paragraph
1602                                                 if ( '' == trim($t) ) {
1603                                                         if ( $paragraphStack ) {
1604                                                                 $output .= $paragraphStack.'<br />';
1605                                                                 $paragraphStack = false;
1606                                                                 $this->mLastSection = 'p';
1607                                                         } else {
1608                                                                 if ($this->mLastSection != 'p' ) {
1609                                                                         $output .= $this->closeParagraph();
1610                                                                         $this->mLastSection = '';
1611                                                                         $paragraphStack = '<p>';
1612                                                                 } else {
1613                                                                         $paragraphStack = '</p><p>';
1614                                                                 }
1615                                                         }
1616                                                 } else {
1617                                                         if ( $paragraphStack ) {
1618                                                                 $output .= $paragraphStack;
1619                                                                 $paragraphStack = false;
1620                                                                 $this->mLastSection = 'p';
1621                                                         } else if ($this->mLastSection != 'p') {
1622                                                                 $output .= $this->closeParagraph().'<p>';
1623                                                                 $this->mLastSection = 'p';
1624                                                         }
1625                                                 }
1626                                         }
1627                                 }
1628                                 wfProfileOut( "$fname-paragraph" );
1629                         }
1630                         if ($paragraphStack === false) {
1631                                 $output .= $t."\n";
1632                         }
1633                 }
1634                 while ( $prefixLength ) {
1635                         $output .= $this->closeList( $pref2{$prefixLength-1} );
1636                         --$prefixLength;
1637                 }
1638                 if ( '' != $this->mLastSection ) {
1639                         $output .= '</' . $this->mLastSection . '>';
1640                         $this->mLastSection = '';
1641                 }
1642
1643                 wfProfileOut( $fname );
1644                 return $output;
1645         }
1646
1647         /**
1648          * Split up a string on ':', ignoring any occurences inside
1649          * <a>..</a> or <span>...</span>
1650          * @param string $str the string to split
1651          * @param string &$before set to everything before the ':'
1652          * @param string &$after set to everything after the ':'
1653          * return string the position of the ':', or false if none found
1654          */
1655         function findColonNoLinks($str, &$before, &$after) {
1656                 # I wonder if we should make this count all tags, not just <a>
1657                 # and <span>. That would prevent us from matching a ':' that
1658                 # comes in the middle of italics other such formatting....
1659                 # -- Wil
1660                 $fname = 'Parser::findColonNoLinks';
1661                 wfProfileIn( $fname );
1662                 $pos = 0;
1663                 do {
1664                         $colon = strpos($str, ':', $pos);
1665
1666                         if ($colon !== false) {
1667                                 $before = substr($str, 0, $colon);
1668                                 $after = substr($str, $colon + 1);
1669
1670                                 # Skip any ':' within <a> or <span> pairs
1671                                 $a = substr_count($before, '<a');
1672                                 $s = substr_count($before, '<span');
1673                                 $ca = substr_count($before, '</a>');
1674                                 $cs = substr_count($before, '</span>');
1675
1676                                 if ($a <= $ca and $s <= $cs) {
1677                                         # Tags are balanced before ':'; ok
1678                                         break;
1679                                 }
1680                                 $pos = $colon + 1;
1681                         }
1682                 } while ($colon !== false);
1683                 wfProfileOut( $fname );
1684                 return $colon;
1685         }
1686
1687         /**
1688          * Return value of a magic variable (like PAGENAME)
1689          *
1690          * @access private
1691          */
1692         function getVariableValue( $index ) {
1693                 global $wgContLang, $wgSitename, $wgServer, $wgArticle;
1694
1695                 /**
1696                  * Some of these require message or data lookups and can be
1697                  * expensive to check many times.
1698                  */
1699                 static $varCache = array();
1700                 if( isset( $varCache[$index] ) ) return $varCache[$index];
1701
1702                 switch ( $index ) {
1703                         case MAG_CURRENTMONTH:
1704                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm' ) );
1705                         case MAG_CURRENTMONTHNAME:
1706                                 return $varCache[$index] = $wgContLang->getMonthName( date('n') );
1707                         case MAG_CURRENTMONTHNAMEGEN:
1708                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date('n') );
1709                         case MAG_CURRENTMONTHABBREV:
1710                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date('n') );
1711                         case MAG_CURRENTDAY:
1712                                 return $varCache[$index] = $wgContLang->formatNum( date('j') );
1713                         case MAG_PAGENAME:
1714                                 return $this->mTitle->getText();
1715                         case MAG_PAGENAMEE:
1716                                 return $this->mTitle->getPartialURL();
1717                         case MAG_REVISIONID:
1718                                 return $wgArticle->getRevIdFetched();
1719                         case MAG_NAMESPACE:
1720                                 # return Namespace::getCanonicalName($this->mTitle->getNamespace());
1721                                 return $wgContLang->getNsText($this->mTitle->getNamespace()); # Patch by Dori
1722                         case MAG_CURRENTDAYNAME:
1723                                 return $varCache[$index] = $wgContLang->getWeekdayName( date('w')+1 );
1724                         case MAG_CURRENTYEAR:
1725                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y' ) );
1726                         case MAG_CURRENTTIME:
1727                                 return $varCache[$index] = $wgContLang->time( wfTimestampNow(), false );
1728                         case MAG_CURRENTWEEK:
1729                                 return $varCache[$index] = $wgContLang->formatNum( date('W') );
1730                         case MAG_CURRENTDOW:
1731                                 return $varCache[$index] = $wgContLang->formatNum( date('w') );
1732                         case MAG_NUMBEROFARTICLES:
1733                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfArticles() );
1734                         case MAG_SITENAME:
1735                                 return $wgSitename;
1736                         case MAG_SERVER:
1737                                 return $wgServer;
1738                         default:
1739                                 return NULL;
1740                 }
1741         }
1742
1743         /**
1744          * initialise the magic variables (like CURRENTMONTHNAME)
1745          *
1746          * @access private
1747          */
1748         function initialiseVariables() {
1749                 $fname = 'Parser::initialiseVariables';
1750                 wfProfileIn( $fname );
1751                 global $wgVariableIDs;
1752                 $this->mVariables = array();
1753                 foreach ( $wgVariableIDs as $id ) {
1754                         $mw =& MagicWord::get( $id );
1755                         $mw->addToArray( $this->mVariables, $id );
1756                 }
1757                 wfProfileOut( $fname );
1758         }
1759
1760         /**
1761          * Replace magic variables, templates, and template arguments
1762          * with the appropriate text. Templates are substituted recursively,
1763          * taking care to avoid infinite loops.
1764          *
1765          * Note that the substitution depends on value of $mOutputType:
1766          *  OT_WIKI: only {{subst:}} templates
1767          *  OT_MSG: only magic variables
1768          *  OT_HTML: all templates and magic variables
1769          *
1770          * @param string $tex The text to transform
1771          * @param array $args Key-value pairs representing template parameters to substitute
1772          * @access private
1773          */
1774         function replaceVariables( $text, $args = array() ) {
1775                 global $wgLang, $wgScript, $wgArticlePath;
1776
1777                 # Prevent too big inclusions
1778                 if( strlen( $text ) > MAX_INCLUDE_SIZE ) {
1779                         return $text;
1780                 }
1781
1782                 $fname = 'Parser::replaceVariables';
1783                 wfProfileIn( $fname );
1784
1785                 $titleChars = Title::legalChars();
1786
1787                 # This function is called recursively. To keep track of arguments we need a stack:
1788                 array_push( $this->mArgStack, $args );
1789
1790                 # Variable substitution
1791                 $text = preg_replace_callback( "/{{([$titleChars]*?)}}/", array( &$this, 'variableSubstitution' ), $text );
1792
1793                 if ( $this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI ) {
1794                         # Argument substitution
1795                         $text = preg_replace_callback( "/{{{([$titleChars]*?)}}}/", array( &$this, 'argSubstitution' ), $text );
1796                 }
1797                 # Template substitution
1798                 $regex = '/(\\n|{)?{{(['.$titleChars.']*)(\\|.*?|)}}/s';
1799                 $text = preg_replace_callback( $regex, array( &$this, 'braceSubstitution' ), $text );
1800
1801                 array_pop( $this->mArgStack );
1802
1803                 wfProfileOut( $fname );
1804                 return $text;
1805         }
1806
1807         /**
1808          * Replace magic variables
1809          * @access private
1810          */
1811         function variableSubstitution( $matches ) {
1812                 $fname = 'parser::variableSubstitution';
1813                 $varname = $matches[1];
1814                 wfProfileIn( $fname );
1815                 if ( !$this->mVariables ) {
1816                         $this->initialiseVariables();
1817                 }
1818                 $skip = false;
1819                 if ( $this->mOutputType == OT_WIKI ) {
1820                         # Do only magic variables prefixed by SUBST
1821                         $mwSubst =& MagicWord::get( MAG_SUBST );
1822                         if (!$mwSubst->matchStartAndRemove( $varname ))
1823                                 $skip = true;
1824                         # Note that if we don't substitute the variable below,
1825                         # we don't remove the {{subst:}} magic word, in case
1826                         # it is a template rather than a magic variable.
1827                 }
1828                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
1829                         $id = $this->mVariables[$varname];
1830                         $text = $this->getVariableValue( $id );
1831                         $this->mOutput->mContainsOldMagic = true;
1832                 } else {
1833                         $text = $matches[0];
1834                 }
1835                 wfProfileOut( $fname );
1836                 return $text;
1837         }
1838
1839         # Split template arguments
1840         function getTemplateArgs( $argsString ) {
1841                 if ( $argsString === '' ) {
1842                         return array();
1843                 }
1844
1845                 $args = explode( '|', substr( $argsString, 1 ) );
1846
1847                 # If any of the arguments contains a '[[' but no ']]', it needs to be
1848                 # merged with the next arg because the '|' character between belongs
1849                 # to the link syntax and not the template parameter syntax.
1850                 $argc = count($args);
1851
1852                 for ( $i = 0; $i < $argc-1; $i++ ) {
1853                         if ( substr_count ( $args[$i], '[[' ) != substr_count ( $args[$i], ']]' ) ) {
1854                                 $args[$i] .= '|'.$args[$i+1];
1855                                 array_splice($args, $i+1, 1);
1856                                 $i--;
1857                                 $argc--;
1858                         }
1859                 }
1860
1861                 return $args;
1862         }
1863
1864         /**
1865          * Return the text of a template, after recursively
1866          * replacing any variables or templates within the template.
1867          *
1868          * @param array $matches The parts of the template
1869          *  $matches[1]: the title, i.e. the part before the |
1870          *  $matches[2]: the parameters (including a leading |), if  any
1871          * @return string the text of the template
1872          * @access private
1873          */
1874         function braceSubstitution( $matches ) {
1875                 global $wgLinkCache, $wgContLang;
1876                 $fname = 'Parser::braceSubstitution';
1877                 wfProfileIn( $fname );
1878
1879                 $found = false;
1880                 $nowiki = false;
1881                 $noparse = false;
1882
1883                 $title = NULL;
1884
1885                 # Need to know if the template comes at the start of a line,
1886                 # to treat the beginning of the template like the beginning
1887                 # of a line for tables and block-level elements.
1888                 $linestart = $matches[1];
1889
1890                 # $part1 is the bit before the first |, and must contain only title characters
1891                 # $args is a list of arguments, starting from index 0, not including $part1
1892
1893                 $part1 = $matches[2];
1894                 # If the third subpattern matched anything, it will start with |
1895
1896                 $args = $this->getTemplateArgs($matches[3]);
1897                 $argc = count( $args );
1898
1899                 # Don't parse {{{}}} because that's only for template arguments
1900                 if ( $linestart === '{' ) {
1901                         $text = $matches[0];
1902                         $found = true;
1903                         $noparse = true;
1904                 }
1905
1906                 # SUBST
1907                 if ( !$found ) {
1908                         $mwSubst =& MagicWord::get( MAG_SUBST );
1909                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor ($this->mOutputType == OT_WIKI) ) {
1910                                 # One of two possibilities is true:
1911                                 # 1) Found SUBST but not in the PST phase
1912                                 # 2) Didn't find SUBST and in the PST phase
1913                                 # In either case, return without further processing
1914                                 $text = $matches[0];
1915                                 $found = true;
1916                                 $noparse = true;
1917                         }
1918                 }
1919
1920                 # MSG, MSGNW and INT
1921                 if ( !$found ) {
1922                         # Check for MSGNW:
1923                         $mwMsgnw =& MagicWord::get( MAG_MSGNW );
1924                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
1925                                 $nowiki = true;
1926                         } else {
1927                                 # Remove obsolete MSG:
1928                                 $mwMsg =& MagicWord::get( MAG_MSG );
1929                                 $mwMsg->matchStartAndRemove( $part1 );
1930                         }
1931
1932                         # Check if it is an internal message
1933                         $mwInt =& MagicWord::get( MAG_INT );
1934                         if ( $mwInt->matchStartAndRemove( $part1 ) ) {
1935                                 if ( $this->incrementIncludeCount( 'int:'.$part1 ) ) {
1936                                         $text = $linestart . wfMsgReal( $part1, $args, true );
1937                                         $found = true;
1938                                 }
1939                         }
1940                 }
1941
1942                 # NS
1943                 if ( !$found ) {
1944                         # Check for NS: (namespace expansion)
1945                         $mwNs = MagicWord::get( MAG_NS );
1946                         if ( $mwNs->matchStartAndRemove( $part1 ) ) {
1947                                 if ( intval( $part1 ) ) {
1948                                         $text = $linestart . $wgContLang->getNsText( intval( $part1 ) );
1949                                         $found = true;
1950                                 } else {
1951                                         $index = Namespace::getCanonicalIndex( strtolower( $part1 ) );
1952                                         if ( !is_null( $index ) ) {
1953                                                 $text = $linestart . $wgContLang->getNsText( $index );
1954                                                 $found = true;
1955                                         }
1956                                 }
1957                         }
1958                 }
1959
1960                 # LOCALURL and LOCALURLE
1961                 if ( !$found ) {
1962                         $mwLocal = MagicWord::get( MAG_LOCALURL );
1963                         $mwLocalE = MagicWord::get( MAG_LOCALURLE );
1964
1965                         if ( $mwLocal->matchStartAndRemove( $part1 ) ) {
1966                                 $func = 'getLocalURL';
1967                         } elseif ( $mwLocalE->matchStartAndRemove( $part1 ) ) {
1968                                 $func = 'escapeLocalURL';
1969                         } else {
1970                                 $func = '';
1971                         }
1972
1973                         if ( $func !== '' ) {
1974                                 $title = Title::newFromText( $part1 );
1975                                 if ( !is_null( $title ) ) {
1976                                         if ( $argc > 0 ) {
1977                                                 $text = $linestart . $title->$func( $args[0] );
1978                                         } else {
1979                                                 $text = $linestart . $title->$func();
1980                                         }
1981                                         $found = true;
1982                                 }
1983                         }
1984                 }
1985
1986                 # GRAMMAR
1987                 if ( !$found && $argc == 1 ) {
1988                         $mwGrammar =& MagicWord::get( MAG_GRAMMAR );
1989                         if ( $mwGrammar->matchStartAndRemove( $part1 ) ) {
1990                                 $text = $linestart . $wgContLang->convertGrammar( $args[0], $part1 );
1991                                 $found = true;
1992                         }
1993                 }
1994
1995                 # Template table test
1996
1997                 # Did we encounter this template already? If yes, it is in the cache
1998                 # and we need to check for loops.
1999                 if ( !$found && isset( $this->mTemplates[$part1] ) ) {
2000                         $found = true;
2001
2002                         # Infinite loop test
2003                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2004                                 $noparse = true;
2005                                 $found = true;
2006                                 $text = $linestart .
2007                                         "\{\{$part1}}" .
2008                                         '<!-- WARNING: template loop detected -->';
2009                                 wfDebug( "$fname: template loop broken at '$part1'\n" );
2010                         } else {
2011                                 # set $text to cached message.
2012                                 $text = $linestart . $this->mTemplates[$part1];
2013                         }
2014                 }
2015
2016                 # Load from database
2017                 $itcamefromthedatabase = false;
2018                 $lastPathLevel = $this->mTemplatePath;
2019                 if ( !$found ) {
2020                         $ns = NS_TEMPLATE;
2021                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage='' );
2022                         if ($subpage !== '') {
2023                                 $ns = $this->mTitle->getNamespace();
2024                         }
2025                         $title = Title::newFromText( $part1, $ns );
2026                         if ( !is_null( $title ) && !$title->isExternal() ) {
2027                                 # Check for excessive inclusion
2028                                 $dbk = $title->getPrefixedDBkey();
2029                                 if ( $this->incrementIncludeCount( $dbk ) ) {
2030                                         # This should never be reached.
2031                                         $article = new Article( $title );
2032                                         $articleContent = $article->getContentWithoutUsingSoManyDamnGlobals();
2033                                         if ( $articleContent !== false ) {
2034                                                 $found = true;
2035                                                 $text = $linestart . $articleContent;
2036                                                 $itcamefromthedatabase = true;
2037                                         }
2038                                 }
2039
2040                                 # If the title is valid but undisplayable, make a link to it
2041                                 if ( $this->mOutputType == OT_HTML && !$found ) {
2042                                         $text = $linestart . '[['.$title->getPrefixedText().']]';
2043                                         $found = true;
2044                                 }
2045
2046                                 # Template cache array insertion
2047                                 if( $found ) {
2048                                         $this->mTemplates[$part1] = $text;
2049                                 }
2050                         }
2051                 }
2052
2053                 # Recursive parsing, escaping and link table handling
2054                 # Only for HTML output
2055                 if ( $nowiki && $found && $this->mOutputType == OT_HTML ) {
2056                         $text = wfEscapeWikiText( $text );
2057                 } elseif ( ($this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI) && $found && !$noparse) {
2058                         # Clean up argument array
2059                         $assocArgs = array();
2060                         $index = 1;
2061                         foreach( $args as $arg ) {
2062                                 $eqpos = strpos( $arg, '=' );
2063                                 if ( $eqpos === false ) {
2064                                         $assocArgs[$index++] = $arg;
2065                                 } else {
2066                                         $name = trim( substr( $arg, 0, $eqpos ) );
2067                                         $value = trim( substr( $arg, $eqpos+1 ) );
2068                                         if ( $value === false ) {
2069                                                 $value = '';
2070                                         }
2071                                         if ( $name !== false ) {
2072                                                 $assocArgs[$name] = $value;
2073                                         }
2074                                 }
2075                         }
2076
2077                         # Add a new element to the templace recursion path
2078                         $this->mTemplatePath[$part1] = 1;
2079
2080                         $text = $this->strip( $text, $this->mStripState );
2081                         $text = Sanitizer::removeHTMLtags( $text );
2082                         $text = $this->replaceVariables( $text, $assocArgs );
2083
2084                         # Resume the link cache and register the inclusion as a link
2085                         if ( $this->mOutputType == OT_HTML && !is_null( $title ) ) {
2086                                 $wgLinkCache->addLinkObj( $title );
2087                         }
2088
2089                         # If the template begins with a table or block-level
2090                         # element, it should be treated as beginning a new line.
2091                         if ($linestart !== '\n' && preg_match('/^({\\||:|;|#|\*)/', $text)) {
2092                                 $text = "\n" . $text;
2093                         }
2094                 }
2095                 # Prune lower levels off the recursion check path
2096                 $this->mTemplatePath = $lastPathLevel;
2097
2098                 if ( !$found ) {
2099                         wfProfileOut( $fname );
2100                         return $matches[0];
2101                 } else {
2102                         # replace ==section headers==
2103                         # XXX this needs to go away once we have a better parser.
2104                         if ( $this->mOutputType != OT_WIKI && $itcamefromthedatabase ) {
2105                                 if( !is_null( $title ) )
2106                                         $encodedname = base64_encode($title->getPrefixedDBkey());
2107                                 else
2108                                         $encodedname = base64_encode("");
2109                                 $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
2110                                         PREG_SPLIT_DELIM_CAPTURE);
2111                                 $text = '';
2112                                 $nsec = 0;
2113                                 for( $i = 0; $i < count($m); $i += 2 ) {
2114                                         $text .= $m[$i];
2115                                         if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
2116                                         $hl = $m[$i + 1];
2117                                         if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
2118                                                 $text .= $hl;
2119                                                 continue;
2120                                         }
2121                                         preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
2122                                         $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
2123                                                 . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
2124
2125                                         $nsec++;
2126                                 }
2127                         }
2128                 }
2129                 # Prune lower levels off the recursion check path
2130                 $this->mTemplatePath = $lastPathLevel;
2131
2132                 if ( !$found ) {
2133                         wfProfileOut( $fname );
2134                         return $matches[0];
2135                 } else {
2136                         wfProfileOut( $fname );
2137                         return $text;
2138                 }
2139         }
2140
2141         /**
2142          * Triple brace replacement -- used for template arguments
2143          * @access private
2144          */
2145         function argSubstitution( $matches ) {
2146                 $arg = trim( $matches[1] );
2147                 $text = $matches[0];
2148                 $inputArgs = end( $this->mArgStack );
2149
2150                 if ( array_key_exists( $arg, $inputArgs ) ) {
2151                         $text = $inputArgs[$arg];
2152                 }
2153
2154                 return $text;
2155         }
2156
2157         /**
2158          * Returns true if the function is allowed to include this entity
2159          * @access private
2160          */
2161         function incrementIncludeCount( $dbk ) {
2162                 if ( !array_key_exists( $dbk, $this->mIncludeCount ) ) {
2163                         $this->mIncludeCount[$dbk] = 0;
2164                 }
2165                 if ( ++$this->mIncludeCount[$dbk] <= MAX_INCLUDE_REPEAT ) {
2166                         return true;
2167                 } else {
2168                         return false;
2169                 }
2170         }
2171
2172         /**
2173          * This function accomplishes several tasks:
2174          * 1) Auto-number headings if that option is enabled
2175          * 2) Add an [edit] link to sections for logged in users who have enabled the option
2176          * 3) Add a Table of contents on the top for users who have enabled the option
2177          * 4) Auto-anchor headings
2178          *
2179          * It loops through all headlines, collects the necessary data, then splits up the
2180          * string and re-inserts the newly formatted headlines.
2181          *
2182          * @param string $text
2183          * @param boolean $isMain
2184          * @access private
2185          */
2186         function formatHeadings( $text, $isMain=true ) {
2187                 global $wgInputEncoding, $wgMaxTocLevel, $wgContLang, $wgLinkHolders, $wgInterwikiLinkHolders;
2188
2189                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
2190                 $doShowToc = true;
2191                 $forceTocHere = false;
2192                 if( !$this->mTitle->userCanEdit() ) {
2193                         $showEditLink = 0;
2194                 } else {
2195                         $showEditLink = $this->mOptions->getEditSection();
2196                 }
2197
2198                 # Inhibit editsection links if requested in the page
2199                 $esw =& MagicWord::get( MAG_NOEDITSECTION );
2200                 if( $esw->matchAndRemove( $text ) ) {
2201                         $showEditLink = 0;
2202                 }
2203                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
2204                 # do not add TOC
2205                 $mw =& MagicWord::get( MAG_NOTOC );
2206                 if( $mw->matchAndRemove( $text ) ) {
2207                         $doShowToc = false;
2208                 }
2209
2210                 # Get all headlines for numbering them and adding funky stuff like [edit]
2211                 # links - this is for later, but we need the number of headlines right now
2212                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
2213
2214                 # if there are fewer than 4 headlines in the article, do not show TOC
2215                 if( $numMatches < 4 ) {
2216                         $doShowToc = false;
2217                 }
2218
2219                 # if the string __TOC__ (not case-sensitive) occurs in the HTML,
2220                 # override above conditions and always show TOC at that place
2221
2222                 $mw =& MagicWord::get( MAG_TOC );
2223                 if($mw->match( $text ) ) {
2224                         $doShowToc = true;
2225                         $forceTocHere = true;
2226                 } else {
2227                         # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
2228                         # override above conditions and always show TOC above first header
2229                         $mw =& MagicWord::get( MAG_FORCETOC );
2230                         if ($mw->matchAndRemove( $text ) ) {
2231                                 $doShowToc = true;
2232                         }
2233                 }
2234
2235                 # Never ever show TOC if no headers
2236                 if( $numMatches < 1 ) {
2237                         $doShowToc = false;
2238                 }
2239
2240                 # We need this to perform operations on the HTML
2241                 $sk =& $this->mOptions->getSkin();
2242
2243                 # headline counter
2244                 $headlineCount = 0;
2245                 $sectionCount = 0; # headlineCount excluding template sections
2246
2247                 # Ugh .. the TOC should have neat indentation levels which can be
2248                 # passed to the skin functions. These are determined here
2249                 $toc = '';
2250                 $full = '';
2251                 $head = array();
2252                 $sublevelCount = array();
2253                 $levelCount = array();
2254                 $toclevel = 0;
2255                 $level = 0;
2256                 $prevlevel = 0;
2257                 $toclevel = 0;
2258                 $prevtoclevel = 0;
2259
2260                 foreach( $matches[3] as $headline ) {
2261                         $istemplate = 0;
2262                         $templatetitle = '';
2263                         $templatesection = 0;
2264                         $numbering = '';
2265
2266                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
2267                                 $istemplate = 1;
2268                                 $templatetitle = base64_decode($mat[1]);
2269                                 $templatesection = 1 + (int)base64_decode($mat[2]);
2270                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
2271                         }
2272
2273                         if( $toclevel ) {
2274                                 $prevlevel = $level;
2275                                 $prevtoclevel = $toclevel;
2276                         }
2277                         $level = $matches[1][$headlineCount];
2278
2279                         if( $doNumberHeadings || $doShowToc ) {
2280
2281                                 if ( $level > $prevlevel ) {
2282                                         # Increase TOC level
2283                                         $toclevel++;
2284                                         $sublevelCount[$toclevel] = 0;
2285                                         $toc .= $sk->tocIndent();
2286                                 }
2287                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
2288                                         # Decrease TOC level, find level to jump to
2289
2290                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
2291                                                 # Can only go down to level 1
2292                                                 $toclevel = 1;
2293                                         } else {
2294                                                 for ($i = $toclevel; $i > 0; $i--) {
2295                                                         if ( $levelCount[$i] == $level ) {
2296                                                                 # Found last matching level
2297                                                                 $toclevel = $i;
2298                                                                 break;
2299                                                         }
2300                                                         elseif ( $levelCount[$i] < $level ) {
2301                                                                 # Found first matching level below current level
2302                                                                 $toclevel = $i + 1;
2303                                                                 break;
2304                                                         }
2305                                                 }
2306                                         }
2307
2308                                         $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
2309                                 }
2310                                 else {
2311                                         # No change in level, end TOC line
2312                                         $toc .= $sk->tocLineEnd();
2313                                 }
2314
2315                                 $levelCount[$toclevel] = $level;
2316
2317                                 # count number of headlines for each level
2318                                 @$sublevelCount[$toclevel]++;
2319                                 $dot = 0;
2320                                 for( $i = 1; $i <= $toclevel; $i++ ) {
2321                                         if( !empty( $sublevelCount[$i] ) ) {
2322                                                 if( $dot ) {
2323                                                         $numbering .= '.';
2324                                                 }
2325                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
2326                                                 $dot = 1;
2327                                         }
2328                                 }
2329                         }
2330
2331                         # The canonized header is a version of the header text safe to use for links
2332                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
2333                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
2334                         $canonized_headline = $this->unstripNoWiki( $canonized_headline, $this->mStripState );
2335
2336                         # Remove link placeholders by the link text.
2337                         #     <!--LINK number-->
2338                         # turns into
2339                         #     link text with suffix
2340                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
2341                                                             "\$wgLinkHolders['texts'][\$1]",
2342                                                             $canonized_headline );
2343                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
2344                                                             "\$wgInterwikiLinkHolders[\$1]",
2345                                                             $canonized_headline );
2346
2347                         # strip out HTML
2348                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
2349                         $tocline = trim( $canonized_headline );
2350                         $canonized_headline = urlencode( do_html_entity_decode( str_replace(' ', '_', $tocline), ENT_COMPAT, $wgInputEncoding ) );
2351                         $replacearray = array(
2352                                 '%3A' => ':',
2353                                 '%' => '.'
2354                         );
2355                         $canonized_headline = str_replace(array_keys($replacearray),array_values($replacearray),$canonized_headline);
2356                         $refer[$headlineCount] = $canonized_headline;
2357
2358                         # count how many in assoc. array so we can track dupes in anchors
2359                         @$refers[$canonized_headline]++;
2360                         $refcount[$headlineCount]=$refers[$canonized_headline];
2361
2362                         # Don't number the heading if it is the only one (looks silly)
2363                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
2364                                 # the two are different if the line contains a link
2365                                 $headline=$numbering . ' ' . $headline;
2366                         }
2367
2368                         # Create the anchor for linking from the TOC to the section
2369                         $anchor = $canonized_headline;
2370                         if($refcount[$headlineCount] > 1 ) {
2371                                 $anchor .= '_' . $refcount[$headlineCount];
2372                         }
2373                         if( $doShowToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
2374                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
2375                         }
2376                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
2377                                 if ( empty( $head[$headlineCount] ) ) {
2378                                         $head[$headlineCount] = '';
2379                                 }
2380                                 if( $istemplate )
2381                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
2382                                 else
2383                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1);
2384                         }
2385
2386                         # give headline the correct <h#> tag
2387                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline.'</h'.$level.'>';
2388
2389                         $headlineCount++;
2390                         if( !$istemplate )
2391                                 $sectionCount++;
2392                 }
2393
2394                 if( $doShowToc ) {
2395                         $toclines = $headlineCount;
2396                         $toc .= $sk->tocUnindent( $toclevel - 1 );
2397                         $toc = $sk->tocList( $toc );
2398                 }
2399
2400                 # split up and insert constructed headlines
2401
2402                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
2403                 $i = 0;
2404
2405                 foreach( $blocks as $block ) {
2406                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
2407                                 # This is the [edit] link that appears for the top block of text when
2408                                 # section editing is enabled
2409
2410                                 # Disabled because it broke block formatting
2411                                 # For example, a bullet point in the top line
2412                                 # $full .= $sk->editSectionLink(0);
2413                         }
2414                         $full .= $block;
2415                         if( $doShowToc && !$i && $isMain && !$forceTocHere) {
2416                         # Top anchor now in skin
2417                                 $full = $full.$toc;
2418                         }
2419
2420                         if( !empty( $head[$i] ) ) {
2421                                 $full .= $head[$i];
2422                         }
2423                         $i++;
2424                 }
2425                 if($forceTocHere) {
2426                         $mw =& MagicWord::get( MAG_TOC );
2427                         return $mw->replace( $toc, $full );
2428                 } else {
2429                         return $full;
2430                 }
2431         }
2432
2433         /**
2434          * Return an HTML link for the "ISBN 123456" text
2435          * @access private
2436          */
2437         function magicISBN( $text ) {
2438                 global $wgLang;
2439                 $fname = 'Parser::magicISBN';
2440                 wfProfileIn( $fname );
2441
2442                 $a = split( 'ISBN ', ' '.$text );
2443                 if ( count ( $a ) < 2 ) {
2444                         wfProfileOut( $fname );
2445                         return $text;
2446                 }
2447                 $text = substr( array_shift( $a ), 1);
2448                 $valid = '0123456789-ABCDEFGHIJKLMNOPQRSTUVWXYZ';
2449
2450                 foreach ( $a as $x ) {
2451                         $isbn = $blank = '' ;
2452                         while ( ' ' == $x{0} ) {
2453                                 $blank .= ' ';
2454                                 $x = substr( $x, 1 );
2455                         }
2456                         if ( $x == '' ) { # blank isbn
2457                                 $text .= "ISBN $blank";
2458                                 continue;
2459                         }
2460                         while ( strstr( $valid, $x{0} ) != false ) {
2461                                 $isbn .= $x{0};
2462                                 $x = substr( $x, 1 );
2463                         }
2464                         $num = str_replace( '-', '', $isbn );
2465                         $num = str_replace( ' ', '', $num );
2466
2467                         if ( '' == $num ) {
2468                                 $text .= "ISBN $blank$x";
2469                         } else {
2470                                 $titleObj = Title::makeTitle( NS_SPECIAL, 'Booksources' );
2471                                 $text .= '<a href="' .
2472                                 $titleObj->escapeLocalUrl( 'isbn='.$num ) .
2473                                         "\" class=\"internal\">ISBN $isbn</a>";
2474                                 $text .= $x;
2475                         }
2476                 }
2477                 wfProfileOut( $fname );
2478                 return $text;
2479         }
2480
2481         /**
2482          * Return an HTML link for the "RFC 1234" text
2483          *
2484          * @access private
2485          * @param string $text     Text to be processed
2486          * @param string $keyword  Magic keyword to use (default RFC)
2487          * @param string $urlmsg   Interface message to use (default rfcurl)
2488          * @return string
2489          */
2490         function magicRFC( $text, $keyword='RFC ', $urlmsg='rfcurl'  ) {
2491                 global $wgLang;
2492
2493                 $valid = '0123456789';
2494                 $internal = false;
2495
2496                 $a = split( $keyword, ' '.$text );
2497                 if ( count ( $a ) < 2 ) {
2498                         return $text;
2499                 }
2500                 $text = substr( array_shift( $a ), 1);
2501
2502                 /* Check if keyword is preceed by [[.
2503                  * This test is made here cause of the array_shift above
2504                  * that prevent the test to be done in the foreach.
2505                  */
2506                 if ( substr( $text, -2 ) == '[[' ) {
2507                         $internal = true;
2508                 }
2509
2510                 foreach ( $a as $x ) {
2511                         /* token might be empty if we have RFC RFC 1234 */
2512                         if ( $x=='' ) {
2513                                 $text.=$keyword;
2514                                 continue;
2515                                 }
2516
2517                         $id = $blank = '' ;
2518
2519                         /** remove and save whitespaces in $blank */
2520                         while ( $x{0} == ' ' ) {
2521                                 $blank .= ' ';
2522                                 $x = substr( $x, 1 );
2523                         }
2524
2525                         /** remove and save the rfc number in $id */
2526                         while ( strstr( $valid, $x{0} ) != false ) {
2527                                 $id .= $x{0};
2528                                 $x = substr( $x, 1 );
2529                         }
2530
2531                         if ( $id == '' ) {
2532                                 /* call back stripped spaces*/
2533                                 $text .= $keyword.$blank.$x;
2534                         } elseif( $internal ) {
2535                                 /* normal link */
2536                                 $text .= $keyword.$id.$x;
2537                         } else {
2538                                 /* build the external link*/
2539                                 $url = wfMsg( $urlmsg, $id);
2540                                 $sk =& $this->mOptions->getSkin();
2541                                 $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
2542                                 $text .= "<a href='{$url}'{$la}>{$keyword}{$id}</a>{$x}";
2543                         }
2544
2545                         /* Check if the next RFC keyword is preceed by [[ */
2546                         $internal = ( substr($x,-2) == '[[' );
2547                 }
2548                 return $text;
2549         }
2550
2551         /**
2552          * Transform wiki markup when saving a page by doing \r\n -> \n
2553          * conversion, substitting signatures, {{subst:}} templates, etc.
2554          *
2555          * @param string $text the text to transform
2556          * @param Title &$title the Title object for the current article
2557          * @param User &$user the User object describing the current user
2558          * @param ParserOptions $options parsing options
2559          * @param bool $clearState whether to clear the parser state first
2560          * @return string the altered wiki markup
2561          * @access public
2562          */
2563         function preSaveTransform( $text, &$title, &$user, $options, $clearState = true ) {
2564                 $this->mOptions = $options;
2565                 $this->mTitle =& $title;
2566                 $this->mOutputType = OT_WIKI;
2567
2568                 if ( $clearState ) {
2569                         $this->clearState();
2570                 }
2571
2572                 $stripState = false;
2573                 $pairs = array(
2574                         "\r\n" => "\n",
2575                         );
2576                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
2577                 $text = $this->strip( $text, $stripState, false );
2578                 $text = $this->pstPass2( $text, $user );
2579                 $text = $this->unstrip( $text, $stripState );
2580                 $text = $this->unstripNoWiki( $text, $stripState );
2581                 return $text;
2582         }
2583
2584         /**
2585          * Pre-save transform helper function
2586          * @access private
2587          */
2588         function pstPass2( $text, &$user ) {
2589                 global $wgLang, $wgContLang, $wgLocaltimezone;
2590
2591                 # Variable replacement
2592                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
2593                 $text = $this->replaceVariables( $text );
2594
2595                 # Signatures
2596                 #
2597                 $n = $user->getName();
2598                 $k = $user->getOption( 'nickname' );
2599                 if ( '' == $k ) { $k = $n; }
2600                 if ( isset( $wgLocaltimezone ) ) {
2601                         $oldtz = getenv( 'TZ' );
2602                         putenv( 'TZ='.$wgLocaltimezone );
2603                 }
2604
2605                 /* Note: This is the timestamp saved as hardcoded wikitext to
2606                  * the database, we use $wgContLang here in order to give
2607                  * everyone the same signiture and use the default one rather
2608                  * than the one selected in each users preferences.
2609                  */
2610                 $d = $wgContLang->timeanddate( wfTimestampNow(), false, false) .
2611                   ' (' . date( 'T' ) . ')';
2612                 if ( isset( $wgLocaltimezone ) ) {
2613                         putenv( 'TZ='.$oldtzs );
2614                 }
2615
2616                 if( $user->getOption( 'fancysig' ) ) {
2617                         $sigText = $k;
2618                 } else {
2619                         $sigText = '[[' . $wgContLang->getNsText( NS_USER ) . ":$n|$k]]";
2620                 }
2621                 $text = preg_replace( '/~~~~~/', $d, $text );
2622                 $text = preg_replace( '/~~~~/', "$sigText $d", $text );
2623                 $text = preg_replace( '/~~~/', $sigText, $text );
2624
2625                 # Context links: [[|name]] and [[name (context)|]]
2626                 #
2627                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
2628                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
2629                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
2630                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
2631
2632                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
2633                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
2634                 $p3 = "/\[\[(:*$namespacechar+):({$np}+)\\|]]/";                # [[namespace:page|]] and [[:namespace:page|]]
2635                 $p4 = "/\[\[(:*$namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/"; # [[ns:page (cont)|]] and [[:ns:page (cont)|]]
2636                 $context = '';
2637                 $t = $this->mTitle->getText();
2638                 if ( preg_match( $conpat, $t, $m ) ) {
2639                         $context = $m[2];
2640                 }
2641                 $text = preg_replace( $p4, '[[\\1:\\2 (\\3)|\\2]]', $text );
2642                 $text = preg_replace( $p1, '[[\\1 (\\2)|\\1]]', $text );
2643                 $text = preg_replace( $p3, '[[\\1:\\2|\\2]]', $text );
2644
2645                 if ( '' == $context ) {
2646                         $text = preg_replace( $p2, '[[\\1]]', $text );
2647                 } else {
2648                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
2649                 }
2650
2651                 # Trim trailing whitespace
2652                 # MAG_END (__END__) tag allows for trailing
2653                 # whitespace to be deliberately included
2654                 $text = rtrim( $text );
2655                 $mw =& MagicWord::get( MAG_END );
2656                 $mw->matchAndRemove( $text );
2657
2658                 return $text;
2659         }
2660
2661         /**
2662          * Set up some variables which are usually set up in parse()
2663          * so that an external function can call some class members with confidence
2664          * @access public
2665          */
2666         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
2667                 $this->mTitle =& $title;
2668                 $this->mOptions = $options;
2669                 $this->mOutputType = $outputType;
2670                 if ( $clearState ) {
2671                         $this->clearState();
2672                 }
2673         }
2674
2675         /**
2676          * Transform a MediaWiki message by replacing magic variables.
2677          *
2678          * @param string $text the text to transform
2679          * @param ParserOptions $options  options
2680          * @return string the text with variables substituted
2681          * @access public
2682          */
2683         function transformMsg( $text, $options ) {
2684                 global $wgTitle;
2685                 static $executing = false;
2686
2687                 # Guard against infinite recursion
2688                 if ( $executing ) {
2689                         return $text;
2690                 }
2691                 $executing = true;
2692
2693                 $this->mTitle = $wgTitle;
2694                 $this->mOptions = $options;
2695                 $this->mOutputType = OT_MSG;
2696                 $this->clearState();
2697                 $text = $this->replaceVariables( $text );
2698
2699                 $executing = false;
2700                 return $text;
2701         }
2702
2703         /**
2704          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
2705          * Callback will be called with the text within
2706          * Transform and return the text within
2707          * @access public
2708          */
2709         function setHook( $tag, $callback ) {
2710                 $oldVal = @$this->mTagHooks[$tag];
2711                 $this->mTagHooks[$tag] = $callback;
2712                 return $oldVal;
2713         }
2714
2715         /**
2716          * Replace <!--LINK--> link placeholders with actual links, in the buffer
2717          * Placeholders created in Skin::makeLinkObj()
2718          * Returns an array of links found, indexed by PDBK:
2719          *  0 - broken
2720          *  1 - normal link
2721          *  2 - stub
2722          * $options is a bit field, RLH_FOR_UPDATE to select for update
2723          */
2724         function replaceLinkHolders( &$text, $options = 0 ) {
2725                 global $wgUser, $wgLinkCache, $wgUseOldExistenceCheck, $wgLinkHolders;
2726                 global $wgInterwikiLinkHolders;
2727                 global $outputReplace;
2728
2729                 if ( $wgUseOldExistenceCheck ) {
2730                         return array();
2731                 }
2732
2733                 $fname = 'Parser::replaceLinkHolders';
2734                 wfProfileIn( $fname );
2735
2736                 $pdbks = array();
2737                 $colours = array();
2738
2739                 #if ( !empty( $tmpLinks[0] ) ) { #TODO
2740                 if ( !empty( $wgLinkHolders['namespaces'] ) ) {
2741                         wfProfileIn( $fname.'-check' );
2742                         $dbr =& wfGetDB( DB_SLAVE );
2743                         $page = $dbr->tableName( 'page' );
2744                         $sk = $wgUser->getSkin();
2745                         $threshold = $wgUser->getOption('stubthreshold');
2746
2747                         # Sort by namespace
2748                         asort( $wgLinkHolders['namespaces'] );
2749
2750                         # Generate query
2751                         $query = false;
2752                         foreach ( $wgLinkHolders['namespaces'] as $key => $val ) {
2753                                 # Make title object
2754                                 $title = $wgLinkHolders['titles'][$key];
2755
2756                                 # Skip invalid entries.
2757                                 # Result will be ugly, but prevents crash.
2758                                 if ( is_null( $title ) ) {
2759                                         continue;
2760                                 }
2761                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
2762
2763                                 # Check if it's in the link cache already
2764                                 if ( $wgLinkCache->getGoodLinkID( $pdbk ) ) {
2765                                         $colours[$pdbk] = 1;
2766                                 } elseif ( $wgLinkCache->isBadLink( $pdbk ) ) {
2767                                         $colours[$pdbk] = 0;
2768                                 } else {
2769                                         # Not in the link cache, add it to the query
2770                                         if ( !isset( $current ) ) {
2771                                                 $current = $val;
2772                                                 $query =  "SELECT page_id, page_namespace, page_title";
2773                                                 if ( $threshold > 0 ) {
2774                                                         $query .= ', page_len, page_is_redirect';
2775                                                 }
2776                                                 $query .= " FROM $page WHERE (page_namespace=$val AND page_title IN(";
2777                                         } elseif ( $current != $val ) {
2778                                                 $current = $val;
2779                                                 $query .= ")) OR (page_namespace=$val AND page_title IN(";
2780                                         } else {
2781                                                 $query .= ', ';
2782                                         }
2783
2784                                         $query .= $dbr->addQuotes( $wgLinkHolders['dbkeys'][$key] );
2785                                 }
2786                         }
2787                         if ( $query ) {
2788                                 $query .= '))';
2789                                 if ( $options & RLH_FOR_UPDATE ) {
2790                                         $query .= ' FOR UPDATE';
2791                                 }
2792
2793                                 $res = $dbr->query( $query, $fname );
2794
2795                                 # Fetch data and form into an associative array
2796                                 # non-existent = broken
2797                                 # 1 = known
2798                                 # 2 = stub
2799                                 while ( $s = $dbr->fetchObject($res) ) {
2800                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
2801                                         $pdbk = $title->getPrefixedDBkey();
2802                                         $wgLinkCache->addGoodLink( $s->page_id, $pdbk );
2803
2804                                         if ( $threshold >  0 ) {
2805                                                 $size = $s->page_len;
2806                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
2807                                                         $colours[$pdbk] = 1;
2808                                                 } else {
2809                                                         $colours[$pdbk] = 2;
2810                                                 }
2811                                         } else {
2812                                                 $colours[$pdbk] = 1;
2813                                         }
2814                                 }
2815                         }
2816                         wfProfileOut( $fname.'-check' );
2817
2818                         # Construct search and replace arrays
2819                         wfProfileIn( $fname.'-construct' );
2820                         $outputReplace = array();
2821                         foreach ( $wgLinkHolders['namespaces'] as $key => $ns ) {
2822                                 $pdbk = $pdbks[$key];
2823                                 $searchkey = '<!--LINK '.$key.'-->';
2824                                 $title = $wgLinkHolders['titles'][$key];
2825                                 if ( empty( $colours[$pdbk] ) ) {
2826                                         $wgLinkCache->addBadLink( $pdbk );
2827                                         $colours[$pdbk] = 0;
2828                                         $outputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
2829                                                                         $wgLinkHolders['texts'][$key],
2830                                                                         $wgLinkHolders['queries'][$key] );
2831                                 } elseif ( $colours[$pdbk] == 1 ) {
2832                                         $outputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
2833                                                                         $wgLinkHolders['texts'][$key],
2834                                                                         $wgLinkHolders['queries'][$key] );
2835                                 } elseif ( $colours[$pdbk] == 2 ) {
2836                                         $outputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
2837                                                                         $wgLinkHolders['texts'][$key],
2838                                                                         $wgLinkHolders['queries'][$key] );
2839                                 }
2840                         }
2841                         wfProfileOut( $fname.'-construct' );
2842
2843                         # Do the thing
2844                         wfProfileIn( $fname.'-replace' );
2845
2846                         $text = preg_replace_callback(
2847                                 '/(<!--LINK .*?-->)/',
2848                                 "outputReplaceMatches",
2849                                 $text);
2850                         wfProfileOut( $fname.'-replace' );
2851                 }
2852
2853                 if ( !empty( $wgInterwikiLinkHolders ) ) {
2854                         wfProfileIn( $fname.'-interwiki' );
2855                         $outputReplace = $wgInterwikiLinkHolders;
2856                         $text = preg_replace_callback(
2857                                 '/<!--IWLINK (.*?)-->/',
2858                                 "outputReplaceMatches",
2859                                 $text );
2860                         wfProfileOut( $fname.'-interwiki' );
2861                 }
2862
2863                 wfProfileOut( $fname );
2864                 return $colours;
2865         }
2866
2867         /**
2868          * Renders an image gallery from a text with one line per image.
2869          * text labels may be given by using |-style alternative text. E.g.
2870          *   Image:one.jpg|The number "1"
2871          *   Image:tree.jpg|A tree
2872          * given as text will return the HTML of a gallery with two images,
2873          * labeled 'The number "1"' and
2874          * 'A tree'.
2875          */
2876         function renderImageGallery( $text ) {
2877                 # Setup the parser
2878                 global $wgUser, $wgParser, $wgTitle;
2879                 $parserOptions = ParserOptions::newFromUser( $wgUser );
2880
2881                 global $wgLinkCache;
2882                 $ig = new ImageGallery();
2883                 $ig->setShowBytes( false );
2884                 $ig->setShowFilename( false );
2885                 $lines = explode( "\n", $text );
2886
2887                 foreach ( $lines as $line ) {
2888                         # match lines like these:
2889                         # Image:someimage.jpg|This is some image
2890                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
2891                         # Skip empty lines
2892                         if ( count( $matches ) == 0 ) {
2893                                 continue;
2894                         }
2895                         $nt = Title::newFromURL( $matches[1] );
2896                         if( is_null( $nt ) ) {
2897                                 # Bogus title. Ignore these so we don't bomb out later.
2898                                 continue;
2899                         }
2900                         if ( isset( $matches[3] ) ) {
2901                                 $label = $matches[3];
2902                         } else {
2903                                 $label = '';
2904                         }
2905
2906                         $html = $wgParser->parse( $label , $wgTitle, $parserOptions );
2907                         $html = $html->mText;
2908
2909                         $ig->add( new Image( $nt ), $html );
2910                         $wgLinkCache->addImageLinkObj( $nt );
2911                 }
2912                 return $ig->toHTML();
2913         }
2914 }
2915
2916 /**
2917  * @todo document
2918  * @package MediaWiki
2919  */
2920 class ParserOutput
2921 {
2922         var $mText, $mLanguageLinks, $mCategoryLinks, $mContainsOldMagic;
2923         var $mCacheTime; # Used in ParserCache
2924         var $mVersion;   # Compatibility check
2925         var $mTitleText; # title text of the chosen language variant
2926
2927         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
2928                 $containsOldMagic = false, $titletext = '' )
2929         {
2930                 $this->mText = $text;
2931                 $this->mLanguageLinks = $languageLinks;
2932                 $this->mCategoryLinks = $categoryLinks;
2933                 $this->mContainsOldMagic = $containsOldMagic;
2934                 $this->mCacheTime = '';
2935                 $this->mVersion = MW_PARSER_VERSION;
2936                 $this->mTitleText = $titletext;
2937         }
2938
2939         function getText()                   { return $this->mText; }
2940         function getLanguageLinks()          { return $this->mLanguageLinks; }
2941         function getCategoryLinks()          { return array_keys( $this->mCategoryLinks ); }
2942         function getCacheTime()              { return $this->mCacheTime; }
2943         function getTitleText()              { return $this->mTitleText; }
2944         function containsOldMagic()          { return $this->mContainsOldMagic; }
2945         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
2946         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
2947         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategoryLinks, $cl ); }
2948         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
2949         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
2950         function setTitleText( $t )          { return wfSetVar ($this->mTitleText, $t); }
2951
2952         function addCategoryLink( $c )       { $this->mCategoryLinks[$c] = 1; }
2953
2954         function merge( $other ) {
2955                 $this->mLanguageLinks = array_merge( $this->mLanguageLinks, $other->mLanguageLinks );
2956                 $this->mCategoryLinks = array_merge( $this->mCategoryLinks, $this->mLanguageLinks );
2957                 $this->mContainsOldMagic = $this->mContainsOldMagic || $other->mContainsOldMagic;
2958         }
2959
2960         /**
2961          * Return true if this cached output object predates the global or
2962          * per-article cache invalidation timestamps, or if it comes from
2963          * an incompatible older version.
2964          *
2965          * @param string $touched the affected article's last touched timestamp
2966          * @return bool
2967          * @access public
2968          */
2969         function expired( $touched ) {
2970                 global $wgCacheEpoch;
2971                 return $this->getCacheTime() <= $touched ||
2972                        $this->getCacheTime() <= $wgCacheEpoch ||
2973                        !isset( $this->mVersion ) ||
2974                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
2975         }
2976 }
2977
2978 /**
2979  * Set options of the Parser
2980  * @todo document
2981  * @package MediaWiki
2982  */
2983 class ParserOptions
2984 {
2985         # All variables are private
2986         var $mUseTeX;                    # Use texvc to expand <math> tags
2987         var $mUseDynamicDates;           # Use $wgDateFormatter to format dates
2988         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
2989         var $mAllowExternalImages;       # Allow external images inline
2990         var $mSkin;                      # Reference to the preferred skin
2991         var $mDateFormat;                # Date format index
2992         var $mEditSection;               # Create "edit section" links
2993         var $mNumberHeadings;            # Automatically number headings
2994
2995         function getUseTeX()                        { return $this->mUseTeX; }
2996         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
2997         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
2998         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
2999         function getSkin()                          { return $this->mSkin; }
3000         function getDateFormat()                    { return $this->mDateFormat; }
3001         function getEditSection()                   { return $this->mEditSection; }
3002         function getNumberHeadings()                { return $this->mNumberHeadings; }
3003
3004         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
3005         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
3006         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
3007         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
3008         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
3009         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
3010         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
3011
3012         function setSkin( &$x ) { $this->mSkin =& $x; }
3013
3014         /**
3015          * Get parser options
3016          * @static
3017          */
3018         function newFromUser( &$user ) {
3019                 $popts = new ParserOptions;
3020                 $popts->initialiseFromUser( $user );
3021                 return $popts;
3022         }
3023
3024         /** Get user options */
3025         function initialiseFromUser( &$userInput ) {
3026                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
3027                 $fname = 'ParserOptions::initialiseFromUser';
3028                 wfProfileIn( $fname );
3029                 if ( !$userInput ) {
3030                         $user = new User;
3031                         $user->setLoaded( true );
3032                 } else {
3033                         $user =& $userInput;
3034                 }
3035
3036                 $this->mUseTeX = $wgUseTeX;
3037                 $this->mUseDynamicDates = $wgUseDynamicDates;
3038                 $this->mInterwikiMagic = $wgInterwikiMagic;
3039                 $this->mAllowExternalImages = $wgAllowExternalImages;
3040                 wfProfileIn( $fname.'-skin' );
3041                 $this->mSkin =& $user->getSkin();
3042                 wfProfileOut( $fname.'-skin' );
3043                 $this->mDateFormat = $user->getOption( 'date' );
3044                 $this->mEditSection = $user->getOption( 'editsection' );
3045                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
3046                 wfProfileOut( $fname );
3047         }
3048 }
3049
3050 /**
3051  * Callback function used by Parser::replaceLinkHolders()
3052  * to substitute link placeholders.
3053  */
3054 function &outputReplaceMatches( $matches ) {
3055         global $outputReplace;
3056         return $outputReplace[$matches[1]];
3057 }
3058
3059 /**
3060  * Return the total number of articles
3061  */
3062 function wfNumberOfArticles() {
3063         global $wgNumberOfArticles;
3064
3065         wfLoadSiteStats();
3066         return $wgNumberOfArticles;
3067 }
3068
3069 /**
3070  * Get various statistics from the database
3071  * @private
3072  */
3073 function wfLoadSiteStats() {
3074         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
3075         $fname = 'wfLoadSiteStats';
3076
3077         if ( -1 != $wgNumberOfArticles ) return;
3078         $dbr =& wfGetDB( DB_SLAVE );
3079         $s = $dbr->selectRow( 'site_stats',
3080                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
3081                 array( 'ss_row_id' => 1 ), $fname
3082         );
3083
3084         if ( $s === false ) {
3085                 return;
3086         } else {
3087                 $wgTotalViews = $s->ss_total_views;
3088                 $wgTotalEdits = $s->ss_total_edits;
3089                 $wgNumberOfArticles = $s->ss_good_articles;
3090         }
3091 }
3092
3093 /**
3094  * Escape html tags
3095  * Basicly replacing " > and < with HTML entities ( &quot;, &gt;, &lt;)
3096  *
3097  * @param string $in Text that might contain HTML tags
3098  * @return string Escaped string
3099  */
3100 function wfEscapeHTMLTagsOnly( $in ) {
3101         return str_replace(
3102                 array( '"', '>', '<' ),
3103                 array( '&quot;', '&gt;', '&lt;' ),
3104                 $in );
3105 }
3106
3107 ?>