includes/Parser.php

   1 <?php
   2 /**
   3  * File for Parser and related classes
   4  *
   5  * @package MediaWiki
   6  * @subpackage Parser
   7  */
   8
   9 /** */
  10 require_once( 'Sanitizer.php' );
  11
  12 /**
  13  * Update this version number when the ParserOutput format
  14  * changes in an incompatible way, so the parser cache
  15  * can automatically discard old data.
  16  */
  17 define( 'MW_PARSER_VERSION', '1.5.0' );
  18
  19 /**
  20  * Variable substitution O(N^2) attack
  21  *
  22  * Without countermeasures, it would be possible to attack the parser by saving
  23  * a page filled with a large number of inclusions of large pages. The size of
  24  * the generated page would be proportional to the square of the input size.
  25  * Hence, we limit the number of inclusions of any given page, thus bringing any
  26  * attack back to O(N).
  27  */
  28
  29 define( 'MAX_INCLUDE_REPEAT', 100 );
  30 define( 'MAX_INCLUDE_SIZE', 1000000 ); // 1 Million
  31
  32 define( 'RLH_FOR_UPDATE', 1 );
  33
  34 # Allowed values for $mOutputType
  35 define( 'OT_HTML', 1 );
  36 define( 'OT_WIKI', 2 );
  37 define( 'OT_MSG' , 3 );
  38
  39 # string parameter for extractTags which will cause it
  40 # to strip HTML comments in addition to regular
  41 # <XML>-style tags. This should not be anything we
  42 # may want to use in wikisyntax
  43 define( 'STRIP_COMMENTS', 'HTMLCommentStrip' );
  44
  45 # prefix for escaping, used in two functions at least
  46 define( 'UNIQ_PREFIX', 'NaodW29');
  47
  48 # Constants needed for external link processing
  49 define( 'URL_PROTOCOLS', 'http|https|ftp|irc|gopher|news|mailto' );
  50 define( 'HTTP_PROTOCOLS', 'http|https' );
  51 # Everything except bracket, space, or control characters
  52 define( 'EXT_LINK_URL_CLASS', '[^]<>"\\x00-\\x20\\x7F]' );
  53 # Including space
  54 define( 'EXT_LINK_TEXT_CLASS', '[^\]\\x00-\\x1F\\x7F]' );
  55 define( 'EXT_IMAGE_FNAME_CLASS', '[A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]' );
  56 define( 'EXT_IMAGE_EXTENSIONS', 'gif|png|jpg|jpeg' );
  57 define( 'EXT_LINK_BRACKETED',  '/\[(\b('.URL_PROTOCOLS.'):'.EXT_LINK_URL_CLASS.'+) *('.EXT_LINK_TEXT_CLASS.'*?)\]/S' );
  58 define( 'EXT_IMAGE_REGEX',
  59         '/^('.HTTP_PROTOCOLS.':)'.  # Protocol
  60         '('.EXT_LINK_URL_CLASS.'+)\\/'.  # Hostname and path
  61         '('.EXT_IMAGE_FNAME_CLASS.'+)\\.((?i)'.EXT_IMAGE_EXTENSIONS.')$/S' # Filename
  62 );
  63
  64 /**
  65  * PHP Parser
  66  *
  67  * Processes wiki markup
  68  *
  69  * <pre>
  70  * There are three main entry points into the Parser class:
  71  * parse()
  72  *   produces HTML output
  73  * preSaveTransform().
  74  *   produces altered wiki markup.
  75  * transformMsg()
  76  *   performs brace substitution on MediaWiki messages
  77  *
  78  * Globals used:
  79  *    objects:   $wgLang, $wgLinkCache
  80  *
  81  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  82  *
  83  * settings:
  84  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  85  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  86  *  $wgLocaltimezone, $wgAllowSpecialInclusion*
  87  *
  88  *  * only within ParserOptions
  89  * </pre>
  90  *
  91  * @package MediaWiki
  92  */
  93 class Parser
  94 {
  95         /**#@+
  96          * @access private
  97          */
  98         # Persistent:
  99         var $mTagHooks;
 100
 101         # Cleared with clearState():
 102         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
 103         var $mVariables, $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 104         var $mInterwikiLinkHolders, $mLinkHolders;
 105
 106         # Temporary:
 107         var $mOptions, $mTitle, $mOutputType,
 108             $mTemplates,        // cache of already loaded templates, avoids
 109                                 // multiple SQL queries for the same string
 110             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
 111                                 // in this path. Used for loop detection.
 112
 113         /**#@-*/
 114
 115         /**
 116          * Constructor
 117          *
 118          * @access public
 119          */
 120         function Parser() {
 121                 global $wgContLang;
 122                 $this->mTemplates = array();
 123                 $this->mTemplatePath = array();
 124                 $this->mTagHooks = array();
 125                 $this->clearState();
 126         }
 127
 128         /**
 129          * Clear Parser state
 130          *
 131          * @access private
 132          */
 133         function clearState() {
 134                 $this->mOutput = new ParserOutput;
 135                 $this->mAutonumber = 0;
 136                 $this->mLastSection = '';
 137                 $this->mDTopen = false;
 138                 $this->mVariables = false;
 139                 $this->mIncludeCount = array();
 140                 $this->mStripState = array();
 141                 $this->mArgStack = array();
 142                 $this->mInPre = false;
 143                 $this->mInterwikiLinkHolders = array(
 144                         'texts' => array(),
 145                         'titles' => array()
 146                 );
 147                 $this->mLinkHolders = array(
 148                         'namespaces' => array(),
 149                         'dbkeys' => array(),
 150                         'queries' => array(),
 151                         'texts' => array(),
 152                         'titles' => array()
 153                 );
 154         }
 155
 156         /**
 157          * First pass--just handle <nowiki> sections, pass the rest off
 158          * to internalParse() which does all the real work.
 159          *
 160          * @access private
 161          * @param string $text Text we want to parse
 162          * @param Title &$title A title object
 163          * @param array $options
 164          * @param boolean $linestart
 165          * @param boolean $clearState
 166          * @return ParserOutput a ParserOutput
 167          */
 168         function parse( $text, &$title, $options, $linestart = true, $clearState = true ) {
 169                 global $wgUseTidy, $wgContLang;
 170                 $fname = 'Parser::parse';
 171                 wfProfileIn( $fname );
 172
 173                 if ( $clearState ) {
 174                         $this->clearState();
 175                 }
 176
 177                 $this->mOptions = $options;
 178                 $this->mTitle =& $title;
 179                 $this->mOutputType = OT_HTML;
 180
 181                 $this->mStripState = NULL;
 182
 183                 //$text = $this->strip( $text, $this->mStripState );
 184                 // VOODOO MAGIC FIX! Sometimes the above segfaults in PHP5.
 185                 $x =& $this->mStripState;
 186                 $text = $this->strip( $text, $x );
 187
 188                 $text = $this->internalParse( $text );
 189
 190
 191                 $text = $this->unstrip( $text, $this->mStripState );
 192
 193                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 194                 $fixtags = array(
 195                         # french spaces, last one Guillemet-left
 196                         # only if there is something before the space
 197                         '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 198                         # french spaces, Guillemet-right
 199                         '/(\\302\\253) /' => '\\1&nbsp;',
 200                         '/<center *>/i' => '<div class="center">',
 201                         '/<\\/center *>/i' => '</div>',
 202                 );
 203                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 204
 205                 # only once and last
 206                 $text = $this->doBlockLevels( $text, $linestart );
 207
 208                 $this->replaceLinkHolders( $text );
 209
 210                 $dashReplace = array(
 211                         '/ - /' => "&nbsp;&ndash; ", # N dash
 212                         '/(?<=[\d])-(?=[\d])/' => "&ndash;", # N dash between numbers
 213                         '/ -- /' => "&nbsp;&mdash; " # M dash
 214                 );
 215                 $text = preg_replace( array_keys($dashReplace), array_values($dashReplace), $text );
 216
 217                 # the position of the convert() call should not be changed. it
 218                 # assumes that the links are all replaces and the only thing left
 219                 # is the <nowiki> mark.
 220                 $text = $wgContLang->convert($text);
 221                 $this->mOutput->setTitleText($wgContLang->getParsedTitle());
 222
 223                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 224
 225                 $text = Sanitizer::normalizeCharReferences( $text );
 226                 global $wgUseTidy;
 227                 if ($wgUseTidy) {
 228                         $text = Parser::tidy($text);
 229                 }
 230
 231                 $this->mOutput->setText( $text );
 232                 wfProfileOut( $fname );
 233                 return $this->mOutput;
 234         }
 235
 236         /**
 237          * Get a random string
 238          *
 239          * @access private
 240          * @static
 241          */
 242         function getRandomString() {
 243                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 244         }
 245
 246         /**
 247          * Replaces all occurrences of <$tag>content</$tag> in the text
 248          * with a random marker and returns the new text. the output parameter
 249          * $content will be an associative array filled with data on the form
 250          * $unique_marker => content.
 251          *
 252          * If $content is already set, the additional entries will be appended
 253          * If $tag is set to STRIP_COMMENTS, the function will extract
 254          * <!-- HTML comments -->
 255          *
 256          * @access private
 257          * @static
 258          */
 259         function extractTagsAndParams($tag, $text, &$content, &$tags, &$params, $uniq_prefix = ''){
 260                 $rnd = $uniq_prefix . '-' . $tag . Parser::getRandomString();
 261                 if ( !$content ) {
 262                         $content = array( );
 263                 }
 264                 $n = 1;
 265                 $stripped = '';
 266
 267                 if ( !$tags ) {
 268                         $tags = array( );
 269                 }
 270
 271                 if ( !$params ) {
 272                         $params = array( );
 273                 }
 274
 275                 // Hack to support short XML style tags
 276                 $text = preg_replace( "/<$tag(\\s+[^>]*|\\s*)\\/>/i", "<$tag\\1></$tag>", $text );
 277
 278                 if( $tag == STRIP_COMMENTS ) {
 279                         $start = '/<!--()/';
 280                         $end   = '/-->/';
 281                 } else {
 282                         $start = "/<$tag(\\s+[^>]*|\\s*)>/i";
 283                         $end   = "/<\\/$tag\\s*>/i";
 284                 }
 285
 286                 while ( '' != $text ) {
 287                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 288                         $stripped .= $p[0];
 289                         if( count( $p ) < 3 ) {
 290                                 break;
 291                         }
 292                         $attributes = $p[1];
 293                         $inside     = $p[2];
 294
 295                         $marker = $rnd . sprintf('%08X', $n++);
 296                         $stripped .= $marker;
 297
 298                         $tags[$marker] = "<$tag$attributes>";
 299                         $params[$marker] = Sanitizer::decodeTagAttributes( $attributes );
 300
 301                         $q = preg_split( $end, $inside, 2 );
 302                         $content[$marker] = $q[0];
 303                         if( count( $q ) < 1 ) {
 304                                 # No end tag -- let it run out to the end of the text.
 305                                 break;
 306                         } else {
 307                                 $text = $q[1];
 308                         }
 309                 }
 310                 return $stripped;
 311         }
 312
 313         /**
 314          * Wrapper function for extractTagsAndParams
 315          * for cases where $tags and $params isn't needed
 316          * i.e. where tags will never have params, like <nowiki>
 317          *
 318          * @access private
 319          * @static
 320          */
 321         function extractTags( $tag, $text, &$content, $uniq_prefix = '' ) {
 322                 $dummy_tags = array();
 323                 $dummy_params = array();
 324
 325                 return Parser::extractTagsAndParams( $tag, $text, $content,
 326                         $dummy_tags, $dummy_params, $uniq_prefix );
 327         }
 328
 329         /**
 330          * Strips and renders nowiki, pre, math, hiero
 331          * If $render is set, performs necessary rendering operations on plugins
 332          * Returns the text, and fills an array with data needed in unstrip()
 333          * If the $state is already a valid strip state, it adds to the state
 334          *
 335          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 336          *  will be stripped in addition to other tags. This is important
 337          *  for section editing, where these comments cause confusion when
 338          *  counting the sections in the wikisource
 339          *
 340          * @access private
 341          */
 342         function strip( $text, &$state, $stripcomments = false ) {
 343                 $render = ($this->mOutputType == OT_HTML);
 344                 $html_content = array();
 345                 $nowiki_content = array();
 346                 $math_content = array();
 347                 $pre_content = array();
 348                 $comment_content = array();
 349                 $ext_content = array();
 350                 $ext_tags = array();
 351                 $ext_params = array();
 352                 $gallery_content = array();
 353
 354                 # Replace any instances of the placeholders
 355                 $uniq_prefix = UNIQ_PREFIX;
 356                 #$text = str_replace( $uniq_prefix, wfHtmlEscapeFirst( $uniq_prefix ), $text );
 357
 358                 # html
 359                 global $wgRawHtml, $wgWhitelistEdit;
 360                 if( $wgRawHtml && $wgWhitelistEdit ) {
 361                         $text = Parser::extractTags('html', $text, $html_content, $uniq_prefix);
 362                         foreach( $html_content as $marker => $content ) {
 363                                 if ($render ) {
 364                                         # Raw and unchecked for validity.
 365                                         $html_content[$marker] = $content;
 366                                 } else {
 367                                         $html_content[$marker] = '<html>'.$content.'</html>';
 368                                 }
 369                         }
 370                 }
 371
 372                 # nowiki
 373                 $text = Parser::extractTags('nowiki', $text, $nowiki_content, $uniq_prefix);
 374                 foreach( $nowiki_content as $marker => $content ) {
 375                         if( $render ){
 376                                 $nowiki_content[$marker] = wfEscapeHTMLTagsOnly( $content );
 377                         } else {
 378                                 $nowiki_content[$marker] = '<nowiki>'.$content.'</nowiki>';
 379                         }
 380                 }
 381
 382                 # math
 383                 $text = Parser::extractTags('math', $text, $math_content, $uniq_prefix);
 384                 foreach( $math_content as $marker => $content ){
 385                         if( $render ) {
 386                                 if( $this->mOptions->getUseTeX() ) {
 387                                         $math_content[$marker] = renderMath( $content );
 388                                 } else {
 389                                         $math_content[$marker] = '&lt;math&gt;'.$content.'&lt;math&gt;';
 390                                 }
 391                         } else {
 392                                 $math_content[$marker] = '<math>'.$content.'</math>';
 393                         }
 394                 }
 395
 396                 # pre
 397                 $text = Parser::extractTags('pre', $text, $pre_content, $uniq_prefix);
 398                 foreach( $pre_content as $marker => $content ){
 399                         if( $render ){
 400                                 $pre_content[$marker] = '<pre>' . wfEscapeHTMLTagsOnly( $content ) . '</pre>';
 401                         } else {
 402                                 $pre_content[$marker] = '<pre>'.$content.'</pre>';
 403                         }
 404                 }
 405
 406                 # gallery
 407                 $text = Parser::extractTags('gallery', $text, $gallery_content, $uniq_prefix);
 408                 foreach( $gallery_content as $marker => $content ) {
 409                         require_once( 'ImageGallery.php' );
 410                         if ( $render ) {
 411                                 $gallery_content[$marker] = Parser::renderImageGallery( $content );
 412                         } else {
 413                                 $gallery_content[$marker] = '<gallery>'.$content.'</gallery>';
 414                         }
 415                 }
 416
 417                 # Comments
 418                 if($stripcomments) {
 419                         $text = Parser::extractTags(STRIP_COMMENTS, $text, $comment_content, $uniq_prefix);
 420                         foreach( $comment_content as $marker => $content ){
 421                                 $comment_content[$marker] = '<!--'.$content.'-->';
 422                         }
 423                 }
 424
 425                 # Extensions
 426                 foreach ( $this->mTagHooks as $tag => $callback ) {
 427                         $ext_content[$tag] = array();
 428                         $text = Parser::extractTagsAndParams( $tag, $text, $ext_content[$tag],
 429                                 $ext_tags[$tag], $ext_params[$tag], $uniq_prefix );
 430                         foreach( $ext_content[$tag] as $marker => $content ) {
 431                                 $full_tag = $ext_tags[$tag][$marker];
 432                                 $params = $ext_params[$tag][$marker];
 433                                 if ( $render ) {
 434                                         $ext_content[$tag][$marker] = $callback( $content, $params );
 435                                 } else {
 436                                         $ext_content[$tag][$marker] = "$full_tag$content</$tag>";
 437                                 }
 438                         }
 439                 }
 440
 441                 # Merge state with the pre-existing state, if there is one
 442                 if ( $state ) {
 443                         $state['html'] = $state['html'] + $html_content;
 444                         $state['nowiki'] = $state['nowiki'] + $nowiki_content;
 445                         $state['math'] = $state['math'] + $math_content;
 446                         $state['pre'] = $state['pre'] + $pre_content;
 447                         $state['comment'] = $state['comment'] + $comment_content;
 448                         $state['gallery'] = $state['gallery'] + $gallery_content;
 449
 450                         foreach( $ext_content as $tag => $array ) {
 451                                 if ( array_key_exists( $tag, $state ) ) {
 452                                         $state[$tag] = $state[$tag] + $array;
 453                                 }
 454                         }
 455                 } else {
 456                         $state = array(
 457                           'html' => $html_content,
 458                           'nowiki' => $nowiki_content,
 459                           'math' => $math_content,
 460                           'pre' => $pre_content,
 461                           'comment' => $comment_content,
 462                           'gallery' => $gallery_content,
 463                         ) + $ext_content;
 464                 }
 465                 return $text;
 466         }
 467
 468         /**
 469          * restores pre, math, and hiero removed by strip()
 470          *
 471          * always call unstripNoWiki() after this one
 472          * @access private
 473          */
 474         function unstrip( $text, &$state ) {
 475                 # Must expand in reverse order, otherwise nested tags will be corrupted
 476                 $contentDict = end( $state );
 477                 for ( $contentDict = end( $state ); $contentDict !== false; $contentDict = prev( $state ) ) {
 478                         if( key($state) != 'nowiki' && key($state) != 'html') {
 479                                 for ( $content = end( $contentDict ); $content !== false; $content = prev( $contentDict ) ) {
 480                                         $text = str_replace( key( $contentDict ), $content, $text );
 481                                 }
 482                         }
 483                 }
 484
 485                 return $text;
 486         }
 487
 488         /**
 489          * always call this after unstrip() to preserve the order
 490          *
 491          * @access private
 492          */
 493         function unstripNoWiki( $text, &$state ) {
 494                 # Must expand in reverse order, otherwise nested tags will be corrupted
 495                 for ( $content = end($state['nowiki']); $content !== false; $content = prev( $state['nowiki'] ) ) {
 496                         $text = str_replace( key( $state['nowiki'] ), $content, $text );
 497                 }
 498
 499                 global $wgRawHtml;
 500                 if ($wgRawHtml) {
 501                         for ( $content = end($state['html']); $content !== false; $content = prev( $state['html'] ) ) {
 502                                 $text = str_replace( key( $state['html'] ), $content, $text );
 503                         }
 504                 }
 505
 506                 return $text;
 507         }
 508
 509         /**
 510          * Add an item to the strip state
 511          * Returns the unique tag which must be inserted into the stripped text
 512          * The tag will be replaced with the original text in unstrip()
 513          *
 514          * @access private
 515          */
 516         function insertStripItem( $text, &$state ) {
 517                 $rnd = UNIQ_PREFIX . '-item' . Parser::getRandomString();
 518                 if ( !$state ) {
 519                         $state = array(
 520                           'html' => array(),
 521                           'nowiki' => array(),
 522                           'math' => array(),
 523                           'pre' => array()
 524                         );
 525                 }
 526                 $state['item'][$rnd] = $text;
 527                 return $rnd;
 528         }
 529
 530         /**
 531          * Interface with html tidy, used if $wgUseTidy = true.
 532          * If tidy isn't able to correct the markup, the original will be
 533          * returned in all its glory with a warning comment appended.
 534          *
 535          * Either the external tidy program or the in-process tidy extension
 536          * will be used depending on availability. Override the default
 537          * $wgTidyInternal setting to disable the internal if it's not working.
 538          *
 539          * @param string $text Hideous HTML input
 540          * @return string Corrected HTML output
 541          * @access public
 542          * @static
 543          */
 544         function tidy( $text ) {
 545                 global $wgTidyInternal;
 546                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 547 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 548 '<head><title>test</title></head><body>'.$text.'</body></html>';
 549                 if( $wgTidyInternal ) {
 550                         $correctedtext = Parser::internalTidy( $wrappedtext );
 551                 } else {
 552                         $correctedtext = Parser::externalTidy( $wrappedtext );
 553                 }
 554                 if( is_null( $correctedtext ) ) {
 555                         wfDebug( "Tidy error detected!\n" );
 556                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 557                 }
 558                 return $correctedtext;
 559         }
 560
 561         /**
 562          * Spawn an external HTML tidy process and get corrected markup back from it.
 563          *
 564          * @access private
 565          * @static
 566          */
 567         function externalTidy( $text ) {
 568                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 569                 $fname = 'Parser::externalTidy';
 570                 wfProfileIn( $fname );
 571
 572                 $cleansource = '';
 573                 $opts = ' -utf8';
 574
 575                 $descriptorspec = array(
 576                         0 => array('pipe', 'r'),
 577                         1 => array('pipe', 'w'),
 578                         2 => array('file', '/dev/null', 'a')
 579                 );
 580                 $pipes = array();
 581                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 582                 if (is_resource($process)) {
 583                         fwrite($pipes[0], $text);
 584                         fclose($pipes[0]);
 585                         while (!feof($pipes[1])) {
 586                                 $cleansource .= fgets($pipes[1], 1024);
 587                         }
 588                         fclose($pipes[1]);
 589                         proc_close($process);
 590                 }
 591
 592                 wfProfileOut( $fname );
 593
 594                 if( $cleansource == '' && $text != '') {
 595                         // Some kind of error happened, so we couldn't get the corrected text.
 596                         // Just give up; we'll use the source text and append a warning.
 597                         return null;
 598                 } else {
 599                         return $cleansource;
 600                 }
 601         }
 602
 603         /**
 604          * Use the HTML tidy PECL extension to use the tidy library in-process,
 605          * saving the overhead of spawning a new process. Currently written to
 606          * the PHP 4.3.x version of the extension, may not work on PHP 5.
 607          *
 608          * 'pear install tidy' should be able to compile the extension module.
 609          *
 610          * @access private
 611          * @static
 612          */
 613         function internalTidy( $text ) {
 614                 global $wgTidyConf;
 615                 $fname = 'Parser::internalTidy';
 616                 wfProfileIn( $fname );
 617
 618                 tidy_load_config( $wgTidyConf );
 619                 tidy_set_encoding( 'utf8' );
 620                 tidy_parse_string( $text );
 621                 tidy_clean_repair();
 622                 if( tidy_get_status() == 2 ) {
 623                         // 2 is magic number for fatal error
 624                         // http://www.php.net/manual/en/function.tidy-get-status.php
 625                         $cleansource = null;
 626                 } else {
 627                         $cleansource = tidy_get_output();
 628                 }
 629                 wfProfileOut( $fname );
 630                 return $cleansource;
 631         }
 632
 633         /**
 634          * parse the wiki syntax used to render tables
 635          *
 636          * @access private
 637          */
 638         function doTableStuff ( $t ) {
 639                 $fname = 'Parser::doTableStuff';
 640                 wfProfileIn( $fname );
 641
 642                 $t = explode ( "\n" , $t ) ;
 643                 $td = array () ; # Is currently a td tag open?
 644                 $ltd = array () ; # Was it TD or TH?
 645                 $tr = array () ; # Is currently a tr tag open?
 646                 $ltr = array () ; # tr attributes
 647                 $indent_level = 0; # indent level of the table
 648                 foreach ( $t AS $k => $x )
 649                 {
 650                         $x = trim ( $x ) ;
 651                         $fc = substr ( $x , 0 , 1 ) ;
 652                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 653                                 $indent_level = strlen( $matches[1] );
 654                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 655                                         '<table' . Sanitizer::fixTagAttributes ( $matches[2], 'table' ) . '>' ;
 656                                 array_push ( $td , false ) ;
 657                                 array_push ( $ltd , '' ) ;
 658                                 array_push ( $tr , false ) ;
 659                                 array_push ( $ltr , '' ) ;
 660                         }
 661                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 662                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 663                                 $z = "</table>" . substr ( $x , 2);
 664                                 $l = array_pop ( $ltd ) ;
 665                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 666                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 667                                 array_pop ( $ltr ) ;
 668                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 669                         }
 670                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 671                                 $x = substr ( $x , 1 ) ;
 672                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 673                                 $z = '' ;
 674                                 $l = array_pop ( $ltd ) ;
 675                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 676                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 677                                 array_pop ( $ltr ) ;
 678                                 $t[$k] = $z ;
 679                                 array_push ( $tr , false ) ;
 680                                 array_push ( $td , false ) ;
 681                                 array_push ( $ltd , '' ) ;
 682                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $x, 'tr' ) ) ;
 683                         }
 684                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 685                                 # $x is a table row
 686                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 687                                         $fc = '+' ;
 688                                         $x = substr ( $x , 1 ) ;
 689                                 }
 690                                 $after = substr ( $x , 1 ) ;
 691                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 692                                 $after = explode ( '||' , $after ) ;
 693                                 $t[$k] = '' ;
 694
 695                                 # Loop through each table cell
 696                                 foreach ( $after AS $theline )
 697                                 {
 698                                         $z = '' ;
 699                                         if ( $fc != '+' )
 700                                         {
 701                                                 $tra = array_pop ( $ltr ) ;
 702                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 703                                                 array_push ( $tr , true ) ;
 704                                                 array_push ( $ltr , '' ) ;
 705                                         }
 706
 707                                         $l = array_pop ( $ltd ) ;
 708                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 709                                         if ( $fc == '|' ) $l = 'td' ;
 710                                         else if ( $fc == '!' ) $l = 'th' ;
 711                                         else if ( $fc == '+' ) $l = 'caption' ;
 712                                         else $l = '' ;
 713                                         array_push ( $ltd , $l ) ;
 714
 715                                         # Cell parameters
 716                                         $y = explode ( '|' , $theline , 2 ) ;
 717                                         # Note that a '|' inside an invalid link should not
 718                                         # be mistaken as delimiting cell parameters
 719                                         if ( strpos( $y[0], '[[' ) !== false ) {
 720                                                 $y = array ($theline);
 721                                         }
 722                                         if ( count ( $y ) == 1 )
 723                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 724                                         else $y = $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($y[0], $l).">{$y[1]}" ;
 725                                         $t[$k] .= $y ;
 726                                         array_push ( $td , true ) ;
 727                                 }
 728                         }
 729                 }
 730
 731                 # Closing open td, tr && table
 732                 while ( count ( $td ) > 0 )
 733                 {
 734                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 735                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 736                         $t[] = '</table>' ;
 737                 }
 738
 739                 $t = implode ( "\n" , $t ) ;
 740                 wfProfileOut( $fname );
 741                 return $t ;
 742         }
 743
 744         /**
 745          * Helper function for parse() that transforms wiki markup into
 746          * HTML. Only called for $mOutputType == OT_HTML.
 747          *
 748          * @access private
 749          */
 750         function internalParse( $text ) {
 751                 global $wgContLang;
 752                 $args = array();
 753                 $isMain = true;
 754                 $fname = 'Parser::internalParse';
 755                 wfProfileIn( $fname );
 756
 757                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'replaceVariables' ) );
 758                 $text = $this->replaceVariables( $text, $args );
 759
 760                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 761
 762                 $text = $this->doHeadings( $text );
 763                 if($this->mOptions->getUseDynamicDates()) {
 764                         $df =& DateFormatter::getInstance();
 765                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 766                 }
 767                 $text = $this->doAllQuotes( $text );
 768                 $text = $this->replaceInternalLinks( $text );
 769                 $text = $this->replaceExternalLinks( $text );
 770
 771                 # replaceInternalLinks may sometimes leave behind
 772                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 773                 $text = str_replace("http-noparse://","http://",$text);
 774
 775                 $text = $this->doMagicLinks( $text );
 776                 $text = $this->doTableStuff( $text );
 777                 $text = $this->formatHeadings( $text, $isMain );
 778
 779                 wfProfileOut( $fname );
 780                 return $text;
 781         }
 782
 783         /**
 784          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 785          * magic external links.
 786          *
 787          * @access private
 788          */
 789         function &doMagicLinks( &$text ) {
 790                 $text = $this->magicISBN( $text );
 791                 $text = $this->magicRFC( $text, 'RFC ', 'rfcurl' );
 792                 $text = $this->magicRFC( $text, 'PMID ', 'pubmedurl' );
 793                 return $text;
 794         }
 795
 796         /**
 797          * Parse ^^ tokens and return html
 798          *
 799          * @access private
 800          */
 801         function doExponent( $text ) {
 802                 $fname = 'Parser::doExponent';
 803                 wfProfileIn( $fname );
 804                 $text = preg_replace('/\^\^(.*)\^\^/','<small><sup>\\1</sup></small>', $text);
 805                 wfProfileOut( $fname );
 806                 return $text;
 807         }
 808
 809         /**
 810          * Parse headers and return html
 811          *
 812          * @access private
 813          */
 814         function doHeadings( $text ) {
 815                 $fname = 'Parser::doHeadings';
 816                 wfProfileIn( $fname );
 817                 for ( $i = 6; $i >= 1; --$i ) {
 818                         $h = substr( '======', 0, $i );
 819                         $text = preg_replace( "/^{$h}(.+){$h}(\\s|$)/m",
 820                           "<h{$i}>\\1</h{$i}>\\2", $text );
 821                 }
 822                 wfProfileOut( $fname );
 823                 return $text;
 824         }
 825
 826         /**
 827          * Replace single quotes with HTML markup
 828          * @access private
 829          * @return string the altered text
 830          */
 831         function doAllQuotes( $text ) {
 832                 $fname = 'Parser::doAllQuotes';
 833                 wfProfileIn( $fname );
 834                 $outtext = '';
 835                 $lines = explode( "\n", $text );
 836                 foreach ( $lines as $line ) {
 837                         $outtext .= $this->doQuotes ( $line ) . "\n";
 838                 }
 839                 $outtext = substr($outtext, 0,-1);
 840                 wfProfileOut( $fname );
 841                 return $outtext;
 842         }
 843
 844         /**
 845          * Helper function for doAllQuotes()
 846          * @access private
 847          */
 848         function doQuotes( $text ) {
 849                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 850                 if ( count( $arr ) == 1 )
 851                         return $text;
 852                 else
 853                 {
 854                         # First, do some preliminary work. This may shift some apostrophes from
 855                         # being mark-up to being text. It also counts the number of occurrences
 856                         # of bold and italics mark-ups.
 857                         $i = 0;
 858                         $numbold = 0;
 859                         $numitalics = 0;
 860                         foreach ( $arr as $r )
 861                         {
 862                                 if ( ( $i % 2 ) == 1 )
 863                                 {
 864                                         # If there are ever four apostrophes, assume the first is supposed to
 865                                         # be text, and the remaining three constitute mark-up for bold text.
 866                                         if ( strlen( $arr[$i] ) == 4 )
 867                                         {
 868                                                 $arr[$i-1] .= "'";
 869                                                 $arr[$i] = "'''";
 870                                         }
 871                                         # If there are more than 5 apostrophes in a row, assume they're all
 872                                         # text except for the last 5.
 873                                         else if ( strlen( $arr[$i] ) > 5 )
 874                                         {
 875                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
 876                                                 $arr[$i] = "'''''";
 877                                         }
 878                                         # Count the number of occurrences of bold and italics mark-ups.
 879                                         # We are not counting sequences of five apostrophes.
 880                                         if ( strlen( $arr[$i] ) == 2 ) $numitalics++;  else
 881                                         if ( strlen( $arr[$i] ) == 3 ) $numbold++;     else
 882                                         if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
 883                                 }
 884                                 $i++;
 885                         }
 886
 887                         # If there is an odd number of both bold and italics, it is likely
 888                         # that one of the bold ones was meant to be an apostrophe followed
 889                         # by italics. Which one we cannot know for certain, but it is more
 890                         # likely to be one that has a single-letter word before it.
 891                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
 892                         {
 893                                 $i = 0;
 894                                 $firstsingleletterword = -1;
 895                                 $firstmultiletterword = -1;
 896                                 $firstspace = -1;
 897                                 foreach ( $arr as $r )
 898                                 {
 899                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
 900                                         {
 901                                                 $x1 = substr ($arr[$i-1], -1);
 902                                                 $x2 = substr ($arr[$i-1], -2, 1);
 903                                                 if ($x1 == ' ') {
 904                                                         if ($firstspace == -1) $firstspace = $i;
 905                                                 } else if ($x2 == ' ') {
 906                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
 907                                                 } else {
 908                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
 909                                                 }
 910                                         }
 911                                         $i++;
 912                                 }
 913
 914                                 # If there is a single-letter word, use it!
 915                                 if ($firstsingleletterword > -1)
 916                                 {
 917                                         $arr [ $firstsingleletterword ] = "''";
 918                                         $arr [ $firstsingleletterword-1 ] .= "'";
 919                                 }
 920                                 # If not, but there's a multi-letter word, use that one.
 921                                 else if ($firstmultiletterword > -1)
 922                                 {
 923                                         $arr [ $firstmultiletterword ] = "''";
 924                                         $arr [ $firstmultiletterword-1 ] .= "'";
 925                                 }
 926                                 # ... otherwise use the first one that has neither.
 927                                 # (notice that it is possible for all three to be -1 if, for example,
 928                                 # there is only one pentuple-apostrophe in the line)
 929                                 else if ($firstspace > -1)
 930                                 {
 931                                         $arr [ $firstspace ] = "''";
 932                                         $arr [ $firstspace-1 ] .= "'";
 933                                 }
 934                         }
 935
 936                         # Now let's actually convert our apostrophic mush to HTML!
 937                         $output = '';
 938                         $buffer = '';
 939                         $state = '';
 940                         $i = 0;
 941                         foreach ($arr as $r)
 942                         {
 943                                 if (($i % 2) == 0)
 944                                 {
 945                                         if ($state == 'both')
 946                                                 $buffer .= $r;
 947                                         else
 948                                                 $output .= $r;
 949                                 }
 950                                 else
 951                                 {
 952                                         if (strlen ($r) == 2)
 953                                         {
 954                                                 if ($state == 'i')
 955                                                 { $output .= '</i>'; $state = ''; }
 956                                                 else if ($state == 'bi')
 957                                                 { $output .= '</i>'; $state = 'b'; }
 958                                                 else if ($state == 'ib')
 959                                                 { $output .= '</b></i><b>'; $state = 'b'; }
 960                                                 else if ($state == 'both')
 961                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
 962                                                 else # $state can be 'b' or ''
 963                                                 { $output .= '<i>'; $state .= 'i'; }
 964                                         }
 965                                         else if (strlen ($r) == 3)
 966                                         {
 967                                                 if ($state == 'b')
 968                                                 { $output .= '</b>'; $state = ''; }
 969                                                 else if ($state == 'bi')
 970                                                 { $output .= '</i></b><i>'; $state = 'i'; }
 971                                                 else if ($state == 'ib')
 972                                                 { $output .= '</b>'; $state = 'i'; }
 973                                                 else if ($state == 'both')
 974                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
 975                                                 else # $state can be 'i' or ''
 976                                                 { $output .= '<b>'; $state .= 'b'; }
 977                                         }
 978                                         else if (strlen ($r) == 5)
 979                                         {
 980                                                 if ($state == 'b')
 981                                                 { $output .= '</b><i>'; $state = 'i'; }
 982                                                 else if ($state == 'i')
 983                                                 { $output .= '</i><b>'; $state = 'b'; }
 984                                                 else if ($state == 'bi')
 985                                                 { $output .= '</i></b>'; $state = ''; }
 986                                                 else if ($state == 'ib')
 987                                                 { $output .= '</b></i>'; $state = ''; }
 988                                                 else if ($state == 'both')
 989                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
 990                                                 else # ($state == '')
 991                                                 { $buffer = ''; $state = 'both'; }
 992                                         }
 993                                 }
 994                                 $i++;
 995                         }
 996                         # Now close all remaining tags.  Notice that the order is important.
 997                         if ($state == 'b' || $state == 'ib')
 998                                 $output .= '</b>';
 999                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1000                                 $output .= '</i>';
1001                         if ($state == 'bi')
1002                                 $output .= '</b>';
1003                         if ($state == 'both')
1004                                 $output .= '<b><i>'.$buffer.'</i></b>';
1005                         return $output;
1006                 }
1007         }
1008
1009         /**
1010          * Replace external links
1011          *
1012          * Note: this is all very hackish and the order of execution matters a lot.
1013          * Make sure to run maintenance/parserTests.php if you change this code.
1014          *
1015          * @access private
1016          */
1017         function replaceExternalLinks( $text ) {
1018                 global $wgContLang;
1019                 $fname = 'Parser::replaceExternalLinks';
1020                 wfProfileIn( $fname );
1021
1022                 $sk =& $this->mOptions->getSkin();
1023
1024                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1025
1026                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1027
1028                 $i = 0;
1029                 while ( $i<count( $bits ) ) {
1030                         $url = $bits[$i++];
1031                         $protocol = $bits[$i++];
1032                         $text = $bits[$i++];
1033                         $trail = $bits[$i++];
1034
1035                         # The characters '<' and '>' (which were escaped by
1036                         # removeHTMLtags()) should not be included in
1037                         # URLs, per RFC 2396.
1038                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1039                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1040                                 $url = substr($url, 0, $m2[0][1]);
1041                         }
1042
1043                         # If the link text is an image URL, replace it with an <img> tag
1044                         # This happened by accident in the original parser, but some people used it extensively
1045                         $img = $this->maybeMakeExternalImage( $text );
1046                         if ( $img !== false ) {
1047                                 $text = $img;
1048                         }
1049
1050                         $dtrail = '';
1051
1052                         # Set linktype for CSS - if URL==text, link is essentially free
1053                         $linktype = ($text == $url) ? 'free' : 'text';
1054
1055                         # No link text, e.g. [http://domain.tld/some.link]
1056                         if ( $text == '' ) {
1057                                 # Autonumber if allowed
1058                                 if ( strpos( HTTP_PROTOCOLS, $protocol ) !== false ) {
1059                                         $text = '[' . ++$this->mAutonumber . ']';
1060                                         $linktype = 'autonumber';
1061                                 } else {
1062                                         # Otherwise just use the URL
1063                                         $text = htmlspecialchars( $url );
1064                                         $linktype = 'free';
1065                                 }
1066                         } else {
1067                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1068                                 # Check for trail
1069                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1070                         }
1071
1072                         $text = $wgContLang->markNoConversion($text);
1073
1074                         # Replace &amp; from obsolete syntax with &.
1075                         # All HTML entities will be escaped by makeExternalLink()
1076                         # or maybeMakeExternalImage()
1077                         $url = str_replace( '&amp;', '&', $url );
1078
1079                         # Process the trail (i.e. everything after this link up until start of the next link),
1080                         # replacing any non-bracketed links
1081                         $trail = $this->replaceFreeExternalLinks( $trail );
1082
1083
1084                         # Use the encoded URL
1085                         # This means that users can paste URLs directly into the text
1086                         # Funny characters like &ouml; aren't valid in URLs anyway
1087                         # This was changed in August 2004
1088                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype ) . $dtrail . $trail;
1089                 }
1090
1091                 wfProfileOut( $fname );
1092                 return $s;
1093         }
1094
1095         /**
1096          * Replace anything that looks like a URL with a link
1097          * @access private
1098          */
1099         function replaceFreeExternalLinks( $text ) {
1100                 global $wgContLang;
1101                 $fname = 'Parser::replaceFreeExternalLinks';
1102                 wfProfileIn( $fname );
1103
1104                 $bits = preg_split( '/(\b(?:'.URL_PROTOCOLS.'):)/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1105                 $s = array_shift( $bits );
1106                 $i = 0;
1107
1108                 $sk =& $this->mOptions->getSkin();
1109
1110                 while ( $i < count( $bits ) ){
1111                         $protocol = $bits[$i++];
1112                         $remainder = $bits[$i++];
1113
1114                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1115                                 # Found some characters after the protocol that look promising
1116                                 $url = $protocol . $m[1];
1117                                 $trail = $m[2];
1118
1119                                 # The characters '<' and '>' (which were escaped by
1120                                 # removeHTMLtags()) should not be included in
1121                                 # URLs, per RFC 2396.
1122                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1123                                         $trail = substr($url, $m2[0][1]) . $trail;
1124                                         $url = substr($url, 0, $m2[0][1]);
1125                                 }
1126
1127                                 # Move trailing punctuation to $trail
1128                                 $sep = ',;\.:!?';
1129                                 # If there is no left bracket, then consider right brackets fair game too
1130                                 if ( strpos( $url, '(' ) === false ) {
1131                                         $sep .= ')';
1132                                 }
1133
1134                                 $numSepChars = strspn( strrev( $url ), $sep );
1135                                 if ( $numSepChars ) {
1136                                         $trail = substr( $url, -$numSepChars ) . $trail;
1137                                         $url = substr( $url, 0, -$numSepChars );
1138                                 }
1139
1140                                 # Replace &amp; from obsolete syntax with &.
1141                                 # All HTML entities will be escaped by makeExternalLink()
1142                                 # or maybeMakeExternalImage()
1143                                 $url = str_replace( '&amp;', '&', $url );
1144
1145                                 # Is this an external image?
1146                                 $text = $this->maybeMakeExternalImage( $url );
1147                                 if ( $text === false ) {
1148                                         # Not an image, make a link
1149                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free' );
1150                                 }
1151                                 $s .= $text . $trail;
1152                         } else {
1153                                 $s .= $protocol . $remainder;
1154                         }
1155                 }
1156                 wfProfileOut();
1157                 return $s;
1158         }
1159
1160         /**
1161          * make an image if it's allowed
1162          * @access private
1163          */
1164         function maybeMakeExternalImage( $url ) {
1165                 $sk =& $this->mOptions->getSkin();
1166                 $text = false;
1167                 if ( $this->mOptions->getAllowExternalImages() ) {
1168                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1169                                 # Image found
1170                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1171                         }
1172                 }
1173                 return $text;
1174         }
1175
1176         /**
1177          * Process [[ ]] wikilinks
1178          *
1179          * @access private
1180          */
1181         function replaceInternalLinks( $s ) {
1182                 global $wgContLang, $wgLinkCache;
1183                 static $fname = 'Parser::replaceInternalLinks' ;
1184
1185                 wfProfileIn( $fname );
1186
1187                 wfProfileIn( $fname.'-setup' );
1188                 static $tc = FALSE;
1189                 # the % is needed to support urlencoded titles as well
1190                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1191
1192                 $sk =& $this->mOptions->getSkin();
1193
1194                 #split the entire text string on occurences of [[
1195                 $a = explode( '[[', ' ' . $s );
1196                 #get the first element (all text up to first [[), and remove the space we added
1197                 $s = array_shift( $a );
1198                 $s = substr( $s, 1 );
1199
1200                 # Match a link having the form [[namespace:link|alternate]]trail
1201                 static $e1 = FALSE;
1202                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1203                 # Match cases where there is no "]]", which might still be images
1204                 static $e1_img = FALSE;
1205                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1206                 # Match the end of a line for a word that's not followed by whitespace,
1207                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1208                 static $e2 = '/^(.*?)([a-zA-Z\x80-\xff]+)$/sD';
1209
1210                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1211
1212                 if( is_null( $this->mTitle ) ) {
1213                         wfDebugDieBacktrace( 'nooo' );
1214                 }
1215                 $nottalk = !$this->mTitle->isTalkPage();
1216
1217                 if ( $useLinkPrefixExtension ) {
1218                         if ( preg_match( $e2, $s, $m ) ) {
1219                                 $first_prefix = $m[2];
1220                                 $s = $m[1];
1221                         } else {
1222                                 $first_prefix = false;
1223                         }
1224                 } else {
1225                         $prefix = '';
1226                 }
1227
1228                 $selflink = $this->mTitle->getPrefixedText();
1229                 wfProfileOut( $fname.'-setup' );
1230
1231                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
1232                 $useSubpages = $this->areSubpagesAllowed();
1233
1234                 # Loop for each link
1235                 for ($k = 0; isset( $a[$k] ); $k++) {
1236                         $line = $a[$k];
1237                         if ( $useLinkPrefixExtension ) {
1238                                 wfProfileIn( $fname.'-prefixhandling' );
1239                                 if ( preg_match( $e2, $s, $m ) ) {
1240                                         $prefix = $m[2];
1241                                         $s = $m[1];
1242                                 } else {
1243                                         $prefix='';
1244                                 }
1245                                 # first link
1246                                 if($first_prefix) {
1247                                         $prefix = $first_prefix;
1248                                         $first_prefix = false;
1249                                 }
1250                                 wfProfileOut( $fname.'-prefixhandling' );
1251                         }
1252
1253                         $might_be_img = false;
1254
1255                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1256                                 $text = $m[2];
1257                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1258                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1259                                 # the real problem is with the $e1 regex
1260                                 # See bug 1300.
1261                                 #
1262                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1263                                 # and no image is in sight. See bug 2095.
1264                                 #
1265                                 if( $text !== '' && preg_match( "/^\](.*)/s", $m[3], $n ) ) {
1266                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1267                                         $m[3] = $n[1];
1268                                 }
1269                                 # fix up urlencoded title texts
1270                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1271                                 $trail = $m[3];
1272                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1273                                 $might_be_img = true;
1274                                 $text = $m[2];
1275                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1276                                 $trail = "";
1277                         } else { # Invalid form; output directly
1278                                 $s .= $prefix . '[[' . $line ;
1279                                 continue;
1280                         }
1281
1282                         # Don't allow internal links to pages containing
1283                         # PROTO: where PROTO is a valid URL protocol; these
1284                         # should be external links.
1285                         if (preg_match('/^(\b(?:'.URL_PROTOCOLS.'):)/', $m[1])) {
1286                                 $s .= $prefix . '[[' . $line ;
1287                                 continue;
1288                         }
1289
1290                         # Make subpage if necessary
1291                         if( $useSubpages ) {
1292                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1293                         } else {
1294                                 $link = $m[1];
1295                         }
1296
1297                         $noforce = (substr($m[1], 0, 1) != ':');
1298                         if (!$noforce) {
1299                                 # Strip off leading ':'
1300                                 $link = substr($link, 1);
1301                         }
1302
1303                         $nt =& Title::newFromText( $this->unstripNoWiki($link, $this->mStripState) );
1304                         if( !$nt ) {
1305                                 $s .= $prefix . '[[' . $line;
1306                                 continue;
1307                         }
1308
1309                         #check other language variants of the link
1310                         #if the article does not exist
1311                         if( $checkVariantLink
1312                             && $nt->getArticleID() == 0 ) {
1313                                 $wgContLang->findVariantLink($link, $nt);
1314                         }
1315
1316                         $ns = $nt->getNamespace();
1317                         $iw = $nt->getInterWiki();
1318
1319                         if ($might_be_img) { # if this is actually an invalid link
1320                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1321                                         $found = false;
1322                                         while (isset ($a[$k+1]) ) {
1323                                                 #look at the next 'line' to see if we can close it there
1324                                                 $next_line =  array_shift(array_splice( $a, $k + 1, 1) );
1325                                                 if( preg_match("/^(.*?]].*?)]](.*)$/sD", $next_line, $m) ) {
1326                                                 # the first ]] closes the inner link, the second the image
1327                                                         $found = true;
1328                                                         $text .= '[[' . $m[1];
1329                                                         $trail = $m[2];
1330                                                         break;
1331                                                 } elseif( preg_match("/^.*?]].*$/sD", $next_line, $m) ) {
1332                                                         #if there's exactly one ]] that's fine, we'll keep looking
1333                                                         $text .= '[[' . $m[0];
1334                                                 } else {
1335                                                         #if $next_line is invalid too, we need look no further
1336                                                         $text .= '[[' . $next_line;
1337                                                         break;
1338                                                 }
1339                                         }
1340                                         if ( !$found ) {
1341                                                 # we couldn't find the end of this imageLink, so output it raw
1342                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1343                                                 $text = $this->replaceInternalLinks($text);
1344                                                 $s .= $prefix . '[[' . $link . '|' . $text;
1345                                                 # note: no $trail, because without an end, there *is* no trail
1346                                                 continue;
1347                                         }
1348                                 } else { #it's not an image, so output it raw
1349                                         $s .= $prefix . '[[' . $link . '|' . $text;
1350                                         # note: no $trail, because without an end, there *is* no trail
1351                                         continue;
1352                                 }
1353                         }
1354
1355                         $wasblank = ( '' == $text );
1356                         if( $wasblank ) $text = $link;
1357
1358
1359                         # Link not escaped by : , create the various objects
1360                         if( $noforce ) {
1361
1362                                 # Interwikis
1363                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1364                                         array_push( $this->mOutput->mLanguageLinks, $nt->getFullText() );
1365                                         $s = rtrim($s . "\n");
1366                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1367                                         continue;
1368                                 }
1369
1370                                 if ( $ns == NS_IMAGE ) {
1371                                         wfProfileIn( "$fname-image" );
1372                                         if ( !wfIsBadImage( $nt->getDBkey() ) ) {
1373                                                 # recursively parse links inside the image caption
1374                                                 # actually, this will parse them in any other parameters, too,
1375                                                 # but it might be hard to fix that, and it doesn't matter ATM
1376                                                 $text = $this->replaceExternalLinks($text);
1377                                                 $text = $this->replaceInternalLinks($text);
1378
1379                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1380                                                 $s .= $prefix . str_replace('http://', 'http-noparse://', $this->makeImage( $nt, $text ) ) . $trail;
1381                                                 $wgLinkCache->addImageLinkObj( $nt );
1382
1383                                                 wfProfileOut( "$fname-image" );
1384                                                 continue;
1385                                         }
1386                                         wfProfileOut( "$fname-image" );
1387
1388                                 }
1389
1390                                 if ( $ns == NS_CATEGORY ) {
1391                                         wfProfileIn( "$fname-category" );
1392                                         $t = $wgContLang->convert($nt->getText());
1393                                         $s = rtrim($s . "\n"); # bug 87
1394
1395                                         $wgLinkCache->suspend(); # Don't save in links/brokenlinks
1396                                         $t = $sk->makeLinkObj( $nt, $t, '', '' , $prefix );
1397                                         $wgLinkCache->resume();
1398
1399                                         if ( $wasblank ) {
1400                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1401                                                         $sortkey = $this->mTitle->getText();
1402                                                 } else {
1403                                                         $sortkey = $this->mTitle->getPrefixedText();
1404                                                 }
1405                                         } else {
1406                                                 $sortkey = $text;
1407                                         }
1408                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1409                                         $wgLinkCache->addCategoryLinkObj( $nt, $sortkey );
1410                                         $this->mOutput->addCategoryLink( $t );
1411
1412                                         /**
1413                                          * Strip the whitespace Category links produce, see bug 87
1414                                          * @todo We might want to use trim($tmp, "\n") here.
1415                                          */
1416                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1417
1418                                         wfProfileOut( "$fname-category" );
1419                                         continue;
1420                                 }
1421                         }
1422
1423                         if( ( $nt->getPrefixedText() === $selflink ) &&
1424                             ( $nt->getFragment() === '' ) ) {
1425                                 # Self-links are handled specially; generally de-link and change to bold.
1426                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1427                                 continue;
1428                         }
1429
1430                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1431                         if( $ns == NS_MEDIA ) {
1432                                 $s .= $prefix . $sk->makeMediaLinkObj( $nt, $text, true ) . $trail;
1433                                 $wgLinkCache->addImageLinkObj( $nt );
1434                                 continue;
1435                         } elseif( $ns == NS_SPECIAL ) {
1436                                 $s .= $prefix . $sk->makeKnownLinkObj( $nt, $text, '', $trail );
1437                                 continue;
1438                         }
1439                         if( $nt->isLocal() && $nt->isAlwaysKnown() ) {
1440                                 /**
1441                                  * Skip lookups for special pages and self-links.
1442                                  * External interwiki links are not included here because
1443                                  * the HTTP urls would break output in the next parse step;
1444                                  * they will have placeholders kept.
1445                                  */
1446                                 $s .= $sk->makeKnownLinkObj( $nt, $text, '', $trail, $prefix );
1447                         } else {
1448                                 /**
1449                                  * Add a link placeholder
1450                                  * Later, this will be replaced by a real link, after the existence or
1451                                  * non-existence of all the links is known
1452                                  */
1453                                 $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1454                         }
1455                 }
1456                 wfProfileOut( $fname );
1457                 return $s;
1458         }
1459
1460         /**
1461          * Make a link placeholder. The text returned can be later resolved to a real link with
1462          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1463          * parsing of interwiki links, and secondly to allow all extistence checks and
1464          * article length checks (for stub links) to be bundled into a single query.
1465          *
1466          */
1467         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1468                 if ( ! is_object($nt) ) {
1469                         # Fail gracefully
1470                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1471                 } else {
1472                         # Separate the link trail from the rest of the link
1473                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1474
1475                         if ( $nt->isExternal() ) {
1476                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1477                                 $this->mInterwikiLinkHolders['titles'][] =& $nt;
1478                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1479                         } else {
1480                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1481                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1482                                 $this->mLinkHolders['queries'][] = $query;
1483                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1484                                 $this->mLinkHolders['titles'][] =& $nt;
1485
1486                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1487                         }
1488                 }
1489                 return $retVal;
1490         }
1491
1492         /**
1493          * Return true if subpage links should be expanded on this page.
1494          * @return bool
1495          */
1496         function areSubpagesAllowed() {
1497                 # Some namespaces don't allow subpages
1498                 global $wgNamespacesWithSubpages;
1499                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1500         }
1501
1502         /**
1503          * Handle link to subpage if necessary
1504          * @param string $target the source of the link
1505          * @param string &$text the link text, modified as necessary
1506          * @return string the full name of the link
1507          * @access private
1508          */
1509         function maybeDoSubpageLink($target, &$text) {
1510                 # Valid link forms:
1511                 # Foobar -- normal
1512                 # :Foobar -- override special treatment of prefix (images, language links)
1513                 # /Foobar -- convert to CurrentPage/Foobar
1514                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1515                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1516                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1517
1518                 $fname = 'Parser::maybeDoSubpageLink';
1519                 wfProfileIn( $fname );
1520                 $ret = $target; # default return value is no change
1521
1522                 # Some namespaces don't allow subpages,
1523                 # so only perform processing if subpages are allowed
1524                 if( $this->areSubpagesAllowed() ) {
1525                         # Look at the first character
1526                         if( $target != '' && $target{0} == '/' ) {
1527                                 # / at end means we don't want the slash to be shown
1528                                 if( substr( $target, -1, 1 ) == '/' ) {
1529                                         $target = substr( $target, 1, -1 );
1530                                         $noslash = $target;
1531                                 } else {
1532                                         $noslash = substr( $target, 1 );
1533                                 }
1534
1535                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1536                                 if( '' === $text ) {
1537                                         $text = $target;
1538                                 } # this might be changed for ugliness reasons
1539                         } else {
1540                                 # check for .. subpage backlinks
1541                                 $dotdotcount = 0;
1542                                 $nodotdot = $target;
1543                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1544                                         ++$dotdotcount;
1545                                         $nodotdot = substr( $nodotdot, 3 );
1546                                 }
1547                                 if($dotdotcount > 0) {
1548                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1549                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1550                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1551                                                 # / at the end means don't show full path
1552                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1553                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1554                                                         if( '' === $text ) {
1555                                                                 $text = $nodotdot;
1556                                                         }
1557                                                 }
1558                                                 $nodotdot = trim( $nodotdot );
1559                                                 if( $nodotdot != '' ) {
1560                                                         $ret .= '/' . $nodotdot;
1561                                                 }
1562                                         }
1563                                 }
1564                         }
1565                 }
1566
1567                 wfProfileOut( $fname );
1568                 return $ret;
1569         }
1570
1571         /**#@+
1572          * Used by doBlockLevels()
1573          * @access private
1574          */
1575         /* private */ function closeParagraph() {
1576                 $result = '';
1577                 if ( '' != $this->mLastSection ) {
1578                         $result = '</' . $this->mLastSection  . ">\n";
1579                 }
1580                 $this->mInPre = false;
1581                 $this->mLastSection = '';
1582                 return $result;
1583         }
1584         # getCommon() returns the length of the longest common substring
1585         # of both arguments, starting at the beginning of both.
1586         #
1587         /* private */ function getCommon( $st1, $st2 ) {
1588                 $fl = strlen( $st1 );
1589                 $shorter = strlen( $st2 );
1590                 if ( $fl < $shorter ) { $shorter = $fl; }
1591
1592                 for ( $i = 0; $i < $shorter; ++$i ) {
1593                         if ( $st1{$i} != $st2{$i} ) { break; }
1594                 }
1595                 return $i;
1596         }
1597         # These next three functions open, continue, and close the list
1598         # element appropriate to the prefix character passed into them.
1599         #
1600         /* private */ function openList( $char ) {
1601                 $result = $this->closeParagraph();
1602
1603                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1604                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1605                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1606                 else if ( ';' == $char ) {
1607                         $result .= '<dl><dt>';
1608                         $this->mDTopen = true;
1609                 }
1610                 else { $result = '<!-- ERR 1 -->'; }
1611
1612                 return $result;
1613         }
1614
1615         /* private */ function nextItem( $char ) {
1616                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1617                 else if ( ':' == $char || ';' == $char ) {
1618                         $close = '</dd>';
1619                         if ( $this->mDTopen ) { $close = '</dt>'; }
1620                         if ( ';' == $char ) {
1621                                 $this->mDTopen = true;
1622                                 return $close . '<dt>';
1623                         } else {
1624                                 $this->mDTopen = false;
1625                                 return $close . '<dd>';
1626                         }
1627                 }
1628                 return '<!-- ERR 2 -->';
1629         }
1630
1631         /* private */ function closeList( $char ) {
1632                 if ( '*' == $char ) { $text = '</li></ul>'; }
1633                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1634                 else if ( ':' == $char ) {
1635                         if ( $this->mDTopen ) {
1636                                 $this->mDTopen = false;
1637                                 $text = '</dt></dl>';
1638                         } else {
1639                                 $text = '</dd></dl>';
1640                         }
1641                 }
1642                 else {  return '<!-- ERR 3 -->'; }
1643                 return $text."\n";
1644         }
1645         /**#@-*/
1646
1647         /**
1648          * Make lists from lines starting with ':', '*', '#', etc.
1649          *
1650          * @access private
1651          * @return string the lists rendered as HTML
1652          */
1653         function doBlockLevels( $text, $linestart ) {
1654                 $fname = 'Parser::doBlockLevels';
1655                 wfProfileIn( $fname );
1656
1657                 # Parsing through the text line by line.  The main thing
1658                 # happening here is handling of block-level elements p, pre,
1659                 # and making lists from lines starting with * # : etc.
1660                 #
1661                 $textLines = explode( "\n", $text );
1662
1663                 $lastPrefix = $output = '';
1664                 $this->mDTopen = $inBlockElem = false;
1665                 $prefixLength = 0;
1666                 $paragraphStack = false;
1667
1668                 if ( !$linestart ) {
1669                         $output .= array_shift( $textLines );
1670                 }
1671                 foreach ( $textLines as $oLine ) {
1672                         $lastPrefixLength = strlen( $lastPrefix );
1673                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
1674                         $preOpenMatch = preg_match('/<pre/i', $oLine );
1675                         if ( !$this->mInPre ) {
1676                                 # Multiple prefixes may abut each other for nested lists.
1677                                 $prefixLength = strspn( $oLine, '*#:;' );
1678                                 $pref = substr( $oLine, 0, $prefixLength );
1679
1680                                 # eh?
1681                                 $pref2 = str_replace( ';', ':', $pref );
1682                                 $t = substr( $oLine, $prefixLength );
1683                                 $this->mInPre = !empty($preOpenMatch);
1684                         } else {
1685                                 # Don't interpret any other prefixes in preformatted text
1686                                 $prefixLength = 0;
1687                                 $pref = $pref2 = '';
1688                                 $t = $oLine;
1689                         }
1690
1691                         # List generation
1692                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
1693                                 # Same as the last item, so no need to deal with nesting or opening stuff
1694                                 $output .= $this->nextItem( substr( $pref, -1 ) );
1695                                 $paragraphStack = false;
1696
1697                                 if ( substr( $pref, -1 ) == ';') {
1698                                         # The one nasty exception: definition lists work like this:
1699                                         # ; title : definition text
1700                                         # So we check for : in the remainder text to split up the
1701                                         # title and definition, without b0rking links.
1702                                         $term = $t2 = '';
1703                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1704                                                 $t = $t2;
1705                                                 $output .= $term . $this->nextItem( ':' );
1706                                         }
1707                                 }
1708                         } elseif( $prefixLength || $lastPrefixLength ) {
1709                                 # Either open or close a level...
1710                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
1711                                 $paragraphStack = false;
1712
1713                                 while( $commonPrefixLength < $lastPrefixLength ) {
1714                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
1715                                         --$lastPrefixLength;
1716                                 }
1717                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
1718                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
1719                                 }
1720                                 while ( $prefixLength > $commonPrefixLength ) {
1721                                         $char = substr( $pref, $commonPrefixLength, 1 );
1722                                         $output .= $this->openList( $char );
1723
1724                                         if ( ';' == $char ) {
1725                                                 # FIXME: This is dupe of code above
1726                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
1727                                                         $t = $t2;
1728                                                         $output .= $term . $this->nextItem( ':' );
1729                                                 }
1730                                         }
1731                                         ++$commonPrefixLength;
1732                                 }
1733                                 $lastPrefix = $pref2;
1734                         }
1735                         if( 0 == $prefixLength ) {
1736                                 wfProfileIn( "$fname-paragraph" );
1737                                 # No prefix (not in list)--go to paragraph mode
1738                                 $uniq_prefix = UNIQ_PREFIX;
1739                                 // XXX: use a stack for nestable elements like span, table and div
1740                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<li|<\\/tr|<\\/td|<\\/th)/iS', $t );
1741                                 $closematch = preg_match(
1742                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
1743                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$uniq_prefix.'-pre|<\\/li|<\\/ul)/iS', $t );
1744                                 if ( $openmatch or $closematch ) {
1745                                         $paragraphStack = false;
1746                                         $output .= $this->closeParagraph();
1747                                         if($preOpenMatch and !$preCloseMatch) {
1748                                                 $this->mInPre = true;
1749                                         }
1750                                         if ( $closematch ) {
1751                                                 $inBlockElem = false;
1752                                         } else {
1753                                                 $inBlockElem = true;
1754                                         }
1755                                 } else if ( !$inBlockElem && !$this->mInPre ) {
1756                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
1757                                                 // pre
1758                                                 if ($this->mLastSection != 'pre') {
1759                                                         $paragraphStack = false;
1760                                                         $output .= $this->closeParagraph().'<pre>';
1761                                                         $this->mLastSection = 'pre';
1762                                                 }
1763                                                 $t = substr( $t, 1 );
1764                                         } else {
1765                                                 // paragraph
1766                                                 if ( '' == trim($t) ) {
1767                                                         if ( $paragraphStack ) {
1768                                                                 $output .= $paragraphStack.'<br />';
1769                                                                 $paragraphStack = false;
1770                                                                 $this->mLastSection = 'p';
1771                                                         } else {
1772                                                                 if ($this->mLastSection != 'p' ) {
1773                                                                         $output .= $this->closeParagraph();
1774                                                                         $this->mLastSection = '';
1775                                                                         $paragraphStack = '<p>';
1776                                                                 } else {
1777                                                                         $paragraphStack = '</p><p>';
1778                                                                 }
1779                                                         }
1780                                                 } else {
1781                                                         if ( $paragraphStack ) {
1782                                                                 $output .= $paragraphStack;
1783                                                                 $paragraphStack = false;
1784                                                                 $this->mLastSection = 'p';
1785                                                         } else if ($this->mLastSection != 'p') {
1786                                                                 $output .= $this->closeParagraph().'<p>';
1787                                                                 $this->mLastSection = 'p';
1788                                                         }
1789                                                 }
1790                                         }
1791                                 }
1792                                 wfProfileOut( "$fname-paragraph" );
1793                         }
1794                         if ($paragraphStack === false) {
1795                                 $output .= $t."\n";
1796                         }
1797                 }
1798                 while ( $prefixLength ) {
1799                         $output .= $this->closeList( $pref2{$prefixLength-1} );
1800                         --$prefixLength;
1801                 }
1802                 if ( '' != $this->mLastSection ) {
1803                         $output .= '</' . $this->mLastSection . '>';
1804                         $this->mLastSection = '';
1805                 }
1806
1807                 wfProfileOut( $fname );
1808                 return $output;
1809         }
1810
1811         /**
1812          * Split up a string on ':', ignoring any occurences inside
1813          * <a>..</a> or <span>...</span>
1814          * @param string $str the string to split
1815          * @param string &$before set to everything before the ':'
1816          * @param string &$after set to everything after the ':'
1817          * return string the position of the ':', or false if none found
1818          */
1819         function findColonNoLinks($str, &$before, &$after) {
1820                 # I wonder if we should make this count all tags, not just <a>
1821                 # and <span>. That would prevent us from matching a ':' that
1822                 # comes in the middle of italics other such formatting....
1823                 # -- Wil
1824                 $fname = 'Parser::findColonNoLinks';
1825                 wfProfileIn( $fname );
1826                 $pos = 0;
1827                 do {
1828                         $colon = strpos($str, ':', $pos);
1829
1830                         if ($colon !== false) {
1831                                 $before = substr($str, 0, $colon);
1832                                 $after = substr($str, $colon + 1);
1833
1834                                 # Skip any ':' within <a> or <span> pairs
1835                                 $a = substr_count($before, '<a');
1836                                 $s = substr_count($before, '<span');
1837                                 $ca = substr_count($before, '</a>');
1838                                 $cs = substr_count($before, '</span>');
1839
1840                                 if ($a <= $ca and $s <= $cs) {
1841                                         # Tags are balanced before ':'; ok
1842                                         break;
1843                                 }
1844                                 $pos = $colon + 1;
1845                         }
1846                 } while ($colon !== false);
1847                 wfProfileOut( $fname );
1848                 return $colon;
1849         }
1850
1851         /**
1852          * Return value of a magic variable (like PAGENAME)
1853          *
1854          * @access private
1855          */
1856         function getVariableValue( $index ) {
1857                 global $wgContLang, $wgSitename, $wgServer, $wgArticle;
1858
1859                 /**
1860                  * Some of these require message or data lookups and can be
1861                  * expensive to check many times.
1862                  */
1863                 static $varCache = array();
1864                 if( isset( $varCache[$index] ) ) return $varCache[$index];
1865
1866                 switch ( $index ) {
1867                         case MAG_CURRENTMONTH:
1868                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm' ) );
1869                         case MAG_CURRENTMONTHNAME:
1870                                 return $varCache[$index] = $wgContLang->getMonthName( date('n') );
1871                         case MAG_CURRENTMONTHNAMEGEN:
1872                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date('n') );
1873                         case MAG_CURRENTMONTHABBREV:
1874                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date('n') );
1875                         case MAG_CURRENTDAY:
1876                                 return $varCache[$index] = $wgContLang->formatNum( date('j') );
1877                         case MAG_PAGENAME:
1878                                 return $this->mTitle->getText();
1879                         case MAG_PAGENAMEE:
1880                                 return $this->mTitle->getPartialURL();
1881                         case MAG_REVISIONID:
1882                                 return $wgArticle->getRevIdFetched();
1883                         case MAG_NAMESPACE:
1884                                 # return Namespace::getCanonicalName($this->mTitle->getNamespace());
1885                                 return $wgContLang->getNsText($this->mTitle->getNamespace()); # Patch by Dori
1886                         case MAG_CURRENTDAYNAME:
1887                                 return $varCache[$index] = $wgContLang->getWeekdayName( date('w')+1 );
1888                         case MAG_CURRENTYEAR:
1889                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y' ), true );
1890                         case MAG_CURRENTTIME:
1891                                 return $varCache[$index] = $wgContLang->time( wfTimestampNow(), false );
1892                         case MAG_CURRENTWEEK:
1893                                 return $varCache[$index] = $wgContLang->formatNum( date('W') );
1894                         case MAG_CURRENTDOW:
1895                                 return $varCache[$index] = $wgContLang->formatNum( date('w') );
1896                         case MAG_NUMBEROFARTICLES:
1897                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfArticles() );
1898                         case MAG_SITENAME:
1899                                 return $wgSitename;
1900                         case MAG_SERVER:
1901                                 return $wgServer;
1902                         default:
1903                                 return NULL;
1904                 }
1905         }
1906
1907         /**
1908          * initialise the magic variables (like CURRENTMONTHNAME)
1909          *
1910          * @access private
1911          */
1912         function initialiseVariables() {
1913                 $fname = 'Parser::initialiseVariables';
1914                 wfProfileIn( $fname );
1915                 global $wgVariableIDs;
1916                 $this->mVariables = array();
1917                 foreach ( $wgVariableIDs as $id ) {
1918                         $mw =& MagicWord::get( $id );
1919                         $mw->addToArray( $this->mVariables, $id );
1920                 }
1921                 wfProfileOut( $fname );
1922         }
1923
1924         /**
1925          * Replace magic variables, templates, and template arguments
1926          * with the appropriate text. Templates are substituted recursively,
1927          * taking care to avoid infinite loops.
1928          *
1929          * Note that the substitution depends on value of $mOutputType:
1930          *  OT_WIKI: only {{subst:}} templates
1931          *  OT_MSG: only magic variables
1932          *  OT_HTML: all templates and magic variables
1933          *
1934          * @param string $tex The text to transform
1935          * @param array $args Key-value pairs representing template parameters to substitute
1936          * @access private
1937          */
1938         function replaceVariables( $text, $args = array() ) {
1939
1940                 # Prevent too big inclusions
1941                 if( strlen( $text ) > MAX_INCLUDE_SIZE ) {
1942                         return $text;
1943                 }
1944
1945                 $fname = 'Parser::replaceVariables';
1946                 wfProfileIn( $fname );
1947
1948                 $titleChars = Title::legalChars();
1949
1950                 # This function is called recursively. To keep track of arguments we need a stack:
1951                 array_push( $this->mArgStack, $args );
1952
1953                 # Variable substitution
1954                 $text = preg_replace_callback( "/{{([$titleChars]*?)}}/", array( &$this, 'variableSubstitution' ), $text );
1955
1956                 if ( $this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI ) {
1957                         # Argument substitution
1958                         $text = preg_replace_callback( "/{{{([$titleChars]*?)}}}/", array( &$this, 'argSubstitution' ), $text );
1959                 }
1960                 # Template substitution
1961                 $regex = '/(\\n|{)?{{(['.$titleChars.']*)(\\|.*?|)}}/s';
1962                 $text = preg_replace_callback( $regex, array( &$this, 'braceSubstitution' ), $text );
1963
1964                 array_pop( $this->mArgStack );
1965
1966                 wfProfileOut( $fname );
1967                 return $text;
1968         }
1969
1970         /**
1971          * Replace magic variables
1972          * @access private
1973          */
1974         function variableSubstitution( $matches ) {
1975                 $fname = 'parser::variableSubstitution';
1976                 $varname = $matches[1];
1977                 wfProfileIn( $fname );
1978                 if ( !$this->mVariables ) {
1979                         $this->initialiseVariables();
1980                 }
1981                 $skip = false;
1982                 if ( $this->mOutputType == OT_WIKI ) {
1983                         # Do only magic variables prefixed by SUBST
1984                         $mwSubst =& MagicWord::get( MAG_SUBST );
1985                         if (!$mwSubst->matchStartAndRemove( $varname ))
1986                                 $skip = true;
1987                         # Note that if we don't substitute the variable below,
1988                         # we don't remove the {{subst:}} magic word, in case
1989                         # it is a template rather than a magic variable.
1990                 }
1991                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
1992                         $id = $this->mVariables[$varname];
1993                         $text = $this->getVariableValue( $id );
1994                         $this->mOutput->mContainsOldMagic = true;
1995                 } else {
1996                         $text = $matches[0];
1997                 }
1998                 wfProfileOut( $fname );
1999                 return $text;
2000         }
2001
2002         # Split template arguments
2003         function getTemplateArgs( $argsString ) {
2004                 if ( $argsString === '' ) {
2005                         return array();
2006                 }
2007
2008                 $args = explode( '|', substr( $argsString, 1 ) );
2009
2010                 # If any of the arguments contains a '[[' but no ']]', it needs to be
2011                 # merged with the next arg because the '|' character between belongs
2012                 # to the link syntax and not the template parameter syntax.
2013                 $argc = count($args);
2014
2015                 for ( $i = 0; $i < $argc-1; $i++ ) {
2016                         if ( substr_count ( $args[$i], '[[' ) != substr_count ( $args[$i], ']]' ) ) {
2017                                 $args[$i] .= '|'.$args[$i+1];
2018                                 array_splice($args, $i+1, 1);
2019                                 $i--;
2020                                 $argc--;
2021                         }
2022                 }
2023
2024                 return $args;
2025         }
2026
2027         /**
2028          * Return the text of a template, after recursively
2029          * replacing any variables or templates within the template.
2030          *
2031          * @param array $matches The parts of the template
2032          *  $matches[1]: the title, i.e. the part before the |
2033          *  $matches[2]: the parameters (including a leading |), if  any
2034          * @return string the text of the template
2035          * @access private
2036          */
2037         function braceSubstitution( $matches ) {
2038                 global $wgLinkCache, $wgContLang;
2039                 $fname = 'Parser::braceSubstitution';
2040                 wfProfileIn( $fname );
2041
2042                 $found = false;
2043                 $nowiki = false;
2044                 $noparse = false;
2045
2046                 $title = NULL;
2047
2048                 # Need to know if the template comes at the start of a line,
2049                 # to treat the beginning of the template like the beginning
2050                 # of a line for tables and block-level elements.
2051                 $linestart = $matches[1];
2052
2053                 # $part1 is the bit before the first |, and must contain only title characters
2054                 # $args is a list of arguments, starting from index 0, not including $part1
2055
2056                 $part1 = $matches[2];
2057                 # If the third subpattern matched anything, it will start with |
2058
2059                 $args = $this->getTemplateArgs($matches[3]);
2060                 $argc = count( $args );
2061
2062                 # Don't parse {{{}}} because that's only for template arguments
2063                 if ( $linestart === '{' ) {
2064                         $text = $matches[0];
2065                         $found = true;
2066                         $noparse = true;
2067                 }
2068
2069                 # SUBST
2070                 if ( !$found ) {
2071                         $mwSubst =& MagicWord::get( MAG_SUBST );
2072                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor ($this->mOutputType == OT_WIKI) ) {
2073                                 # One of two possibilities is true:
2074                                 # 1) Found SUBST but not in the PST phase
2075                                 # 2) Didn't find SUBST and in the PST phase
2076                                 # In either case, return without further processing
2077                                 $text = $matches[0];
2078                                 $found = true;
2079                                 $noparse = true;
2080                         }
2081                 }
2082
2083                 # MSG, MSGNW and INT
2084                 if ( !$found ) {
2085                         # Check for MSGNW:
2086                         $mwMsgnw =& MagicWord::get( MAG_MSGNW );
2087                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2088                                 $nowiki = true;
2089                         } else {
2090                                 # Remove obsolete MSG:
2091                                 $mwMsg =& MagicWord::get( MAG_MSG );
2092                                 $mwMsg->matchStartAndRemove( $part1 );
2093                         }
2094
2095                         # Check if it is an internal message
2096                         $mwInt =& MagicWord::get( MAG_INT );
2097                         if ( $mwInt->matchStartAndRemove( $part1 ) ) {
2098                                 if ( $this->incrementIncludeCount( 'int:'.$part1 ) ) {
2099                                         $text = $linestart . wfMsgReal( $part1, $args, true );
2100                                         $found = true;
2101                                 }
2102                         }
2103                 }
2104
2105                 # NS
2106                 if ( !$found ) {
2107                         # Check for NS: (namespace expansion)
2108                         $mwNs = MagicWord::get( MAG_NS );
2109                         if ( $mwNs->matchStartAndRemove( $part1 ) ) {
2110                                 if ( intval( $part1 ) ) {
2111                                         $text = $linestart . $wgContLang->getNsText( intval( $part1 ) );
2112                                         $found = true;
2113                                 } else {
2114                                         $index = Namespace::getCanonicalIndex( strtolower( $part1 ) );
2115                                         if ( !is_null( $index ) ) {
2116                                                 $text = $linestart . $wgContLang->getNsText( $index );
2117                                                 $found = true;
2118                                         }
2119                                 }
2120                         }
2121                 }
2122
2123                 # LOCALURL and LOCALURLE
2124                 if ( !$found ) {
2125                         $mwLocal = MagicWord::get( MAG_LOCALURL );
2126                         $mwLocalE = MagicWord::get( MAG_LOCALURLE );
2127
2128                         if ( $mwLocal->matchStartAndRemove( $part1 ) ) {
2129                                 $func = 'getLocalURL';
2130                         } elseif ( $mwLocalE->matchStartAndRemove( $part1 ) ) {
2131                                 $func = 'escapeLocalURL';
2132                         } else {
2133                                 $func = '';
2134                         }
2135
2136                         if ( $func !== '' ) {
2137                                 $title = Title::newFromText( $part1 );
2138                                 if ( !is_null( $title ) ) {
2139                                         if ( $argc > 0 ) {
2140                                                 $text = $linestart . $title->$func( $args[0] );
2141                                         } else {
2142                                                 $text = $linestart . $title->$func();
2143                                         }
2144                                         $found = true;
2145                                 }
2146                         }
2147                 }
2148
2149                 # GRAMMAR
2150                 if ( !$found && $argc == 1 ) {
2151                         $mwGrammar =& MagicWord::get( MAG_GRAMMAR );
2152                         if ( $mwGrammar->matchStartAndRemove( $part1 ) ) {
2153                                 $text = $linestart . $wgContLang->convertGrammar( $args[0], $part1 );
2154                                 $found = true;
2155                         }
2156                 }
2157
2158                 # Template table test
2159
2160                 # Did we encounter this template already? If yes, it is in the cache
2161                 # and we need to check for loops.
2162                 if ( !$found && isset( $this->mTemplates[$part1] ) ) {
2163                         $found = true;
2164
2165                         # Infinite loop test
2166                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2167                                 $noparse = true;
2168                                 $found = true;
2169                                 $text = $linestart .
2170                                         "\{\{$part1}}" .
2171                                         '<!-- WARNING: template loop detected -->';
2172                                 wfDebug( "$fname: template loop broken at '$part1'\n" );
2173                         } else {
2174                                 # set $text to cached message.
2175                                 $text = $linestart . $this->mTemplates[$part1];
2176                         }
2177                 }
2178
2179                 # Load from database
2180                 $replaceHeadings = false;
2181                 $isHTML = false;
2182                 $lastPathLevel = $this->mTemplatePath;
2183                 if ( !$found ) {
2184                         $ns = NS_TEMPLATE;
2185                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage='' );
2186                         if ($subpage !== '') {
2187                                 $ns = $this->mTitle->getNamespace();
2188                         }
2189                         $title = Title::newFromText( $part1, $ns );
2190                         if ( !is_null( $title ) && !$title->isExternal() ) {
2191                                 # Check for excessive inclusion
2192                                 $dbk = $title->getPrefixedDBkey();
2193                                 if ( $this->incrementIncludeCount( $dbk ) ) {
2194                                         if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() ) {
2195                                                 # Capture special page output
2196                                                 $text = SpecialPage::capturePath( $title );
2197                                                 if ( $text && !is_object( $text ) ) {
2198                                                         $found = true;
2199                                                         $noparse = true;
2200                                                         $isHTML = true;
2201                                                         $this->mOutput->setCacheTime( -1 );
2202                                                 }
2203                                         } else {
2204                                                 $article = new Article( $title );
2205                                                 $articleContent = $article->getContentWithoutUsingSoManyDamnGlobals();
2206                                                 if ( $articleContent !== false ) {
2207                                                         $found = true;
2208                                                         $text = $articleContent;
2209                                                         $replaceHeadings = true;
2210                                                 }
2211                                         }
2212                                 }
2213
2214                                 # If the title is valid but undisplayable, make a link to it
2215                                 if ( $this->mOutputType == OT_HTML && !$found ) {
2216                                         $text = '[['.$title->getPrefixedText().']]';
2217                                         $found = true;
2218                                 }
2219
2220                                 # Template cache array insertion
2221                                 if( $found ) {
2222                                         $this->mTemplates[$part1] = $text;
2223                                         $text = $linestart . $text;
2224                                 }
2225                         }
2226                 }
2227
2228                 # Recursive parsing, escaping and link table handling
2229                 # Only for HTML output
2230                 if ( $nowiki && $found && $this->mOutputType == OT_HTML ) {
2231                         $text = wfEscapeWikiText( $text );
2232                 } elseif ( ($this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI) && $found && !$noparse) {
2233                         # Clean up argument array
2234                         $assocArgs = array();
2235                         $index = 1;
2236                         foreach( $args as $arg ) {
2237                                 $eqpos = strpos( $arg, '=' );
2238                                 if ( $eqpos === false ) {
2239                                         $assocArgs[$index++] = $arg;
2240                                 } else {
2241                                         $name = trim( substr( $arg, 0, $eqpos ) );
2242                                         $value = trim( substr( $arg, $eqpos+1 ) );
2243                                         if ( $value === false ) {
2244                                                 $value = '';
2245                                         }
2246                                         if ( $name !== false ) {
2247                                                 $assocArgs[$name] = $value;
2248                                         }
2249                                 }
2250                         }
2251
2252                         # Add a new element to the templace recursion path
2253                         $this->mTemplatePath[$part1] = 1;
2254
2255                         if( $this->mOutputType == OT_HTML ) {
2256                                 $text = $this->strip( $text, $this->mStripState );
2257                                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'replaceVariables' ), $assocArgs );
2258                         }
2259                         $text = $this->replaceVariables( $text, $assocArgs );
2260
2261                         # Resume the link cache and register the inclusion as a link
2262                         if ( $this->mOutputType == OT_HTML && !is_null( $title ) ) {
2263                                 $wgLinkCache->addLinkObj( $title );
2264                         }
2265
2266                         # If the template begins with a table or block-level
2267                         # element, it should be treated as beginning a new line.
2268                         if ($linestart !== '\n' && preg_match('/^({\\||:|;|#|\*)/', $text)) {
2269                                 $text = "\n" . $text;
2270                         }
2271                 }
2272                 # Prune lower levels off the recursion check path
2273                 $this->mTemplatePath = $lastPathLevel;
2274
2275                 if ( !$found ) {
2276                         wfProfileOut( $fname );
2277                         return $matches[0];
2278                 } else {
2279                         if ( $isHTML ) {
2280                                 # Replace raw HTML by a placeholder
2281                                 # Add a blank line preceding, to prevent it from mucking up
2282                                 # immediately preceding headings
2283                                 $text = "\n\n" . $this->insertStripItem( $text, $this->mStripState );
2284                         } else {
2285                                 # replace ==section headers==
2286                                 # XXX this needs to go away once we have a better parser.
2287                                 if ( $this->mOutputType != OT_WIKI && $replaceHeadings ) {
2288                                         if( !is_null( $title ) )
2289                                                 $encodedname = base64_encode($title->getPrefixedDBkey());
2290                                         else
2291                                                 $encodedname = base64_encode("");
2292                                         $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
2293                                                 PREG_SPLIT_DELIM_CAPTURE);
2294                                         $text = '';
2295                                         $nsec = 0;
2296                                         for( $i = 0; $i < count($m); $i += 2 ) {
2297                                                 $text .= $m[$i];
2298                                                 if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
2299                                                 $hl = $m[$i + 1];
2300                                                 if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
2301                                                         $text .= $hl;
2302                                                         continue;
2303                                                 }
2304                                                 preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
2305                                                 $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
2306                                                         . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
2307
2308                                                 $nsec++;
2309                                         }
2310                                 }
2311                         }
2312                 }
2313
2314                 # Prune lower levels off the recursion check path
2315                 $this->mTemplatePath = $lastPathLevel;
2316
2317                 if ( !$found ) {
2318                         wfProfileOut( $fname );
2319                         return $matches[0];
2320                 } else {
2321                         wfProfileOut( $fname );
2322                         return $text;
2323                 }
2324         }
2325
2326         /**
2327          * Triple brace replacement -- used for template arguments
2328          * @access private
2329          */
2330         function argSubstitution( $matches ) {
2331                 $arg = trim( $matches[1] );
2332                 $text = $matches[0];
2333                 $inputArgs = end( $this->mArgStack );
2334
2335                 if ( array_key_exists( $arg, $inputArgs ) ) {
2336                         $text = $inputArgs[$arg];
2337                 }
2338
2339                 return $text;
2340         }
2341
2342         /**
2343          * Returns true if the function is allowed to include this entity
2344          * @access private
2345          */
2346         function incrementIncludeCount( $dbk ) {
2347                 if ( !array_key_exists( $dbk, $this->mIncludeCount ) ) {
2348                         $this->mIncludeCount[$dbk] = 0;
2349                 }
2350                 if ( ++$this->mIncludeCount[$dbk] <= MAX_INCLUDE_REPEAT ) {
2351                         return true;
2352                 } else {
2353                         return false;
2354                 }
2355         }
2356
2357         /**
2358          * This function accomplishes several tasks:
2359          * 1) Auto-number headings if that option is enabled
2360          * 2) Add an [edit] link to sections for logged in users who have enabled the option
2361          * 3) Add a Table of contents on the top for users who have enabled the option
2362          * 4) Auto-anchor headings
2363          *
2364          * It loops through all headlines, collects the necessary data, then splits up the
2365          * string and re-inserts the newly formatted headlines.
2366          *
2367          * @param string $text
2368          * @param boolean $isMain
2369          * @access private
2370          */
2371         function formatHeadings( $text, $isMain=true ) {
2372                 global $wgMaxTocLevel, $wgContLang, $wgLinkHolders, $wgInterwikiLinkHolders;
2373
2374                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
2375                 $doShowToc = true;
2376                 $forceTocHere = false;
2377                 if( !$this->mTitle->userCanEdit() ) {
2378                         $showEditLink = 0;
2379                 } else {
2380                         $showEditLink = $this->mOptions->getEditSection();
2381                 }
2382
2383                 # Inhibit editsection links if requested in the page
2384                 $esw =& MagicWord::get( MAG_NOEDITSECTION );
2385                 if( $esw->matchAndRemove( $text ) ) {
2386                         $showEditLink = 0;
2387                 }
2388                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
2389                 # do not add TOC
2390                 $mw =& MagicWord::get( MAG_NOTOC );
2391                 if( $mw->matchAndRemove( $text ) ) {
2392                         $doShowToc = false;
2393                 }
2394
2395                 # Get all headlines for numbering them and adding funky stuff like [edit]
2396                 # links - this is for later, but we need the number of headlines right now
2397                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
2398
2399                 # if there are fewer than 4 headlines in the article, do not show TOC
2400                 if( $numMatches < 4 ) {
2401                         $doShowToc = false;
2402                 }
2403
2404                 # if the string __TOC__ (not case-sensitive) occurs in the HTML,
2405                 # override above conditions and always show TOC at that place
2406
2407                 $mw =& MagicWord::get( MAG_TOC );
2408                 if($mw->match( $text ) ) {
2409                         $doShowToc = true;
2410                         $forceTocHere = true;
2411                 } else {
2412                         # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
2413                         # override above conditions and always show TOC above first header
2414                         $mw =& MagicWord::get( MAG_FORCETOC );
2415                         if ($mw->matchAndRemove( $text ) ) {
2416                                 $doShowToc = true;
2417                         }
2418                 }
2419
2420                 # Never ever show TOC if no headers
2421                 if( $numMatches < 1 ) {
2422                         $doShowToc = false;
2423                 }
2424
2425                 # We need this to perform operations on the HTML
2426                 $sk =& $this->mOptions->getSkin();
2427
2428                 # headline counter
2429                 $headlineCount = 0;
2430                 $sectionCount = 0; # headlineCount excluding template sections
2431
2432                 # Ugh .. the TOC should have neat indentation levels which can be
2433                 # passed to the skin functions. These are determined here
2434                 $toc = '';
2435                 $full = '';
2436                 $head = array();
2437                 $sublevelCount = array();
2438                 $levelCount = array();
2439                 $toclevel = 0;
2440                 $level = 0;
2441                 $prevlevel = 0;
2442                 $toclevel = 0;
2443                 $prevtoclevel = 0;
2444
2445                 foreach( $matches[3] as $headline ) {
2446                         $istemplate = 0;
2447                         $templatetitle = '';
2448                         $templatesection = 0;
2449                         $numbering = '';
2450
2451                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
2452                                 $istemplate = 1;
2453                                 $templatetitle = base64_decode($mat[1]);
2454                                 $templatesection = 1 + (int)base64_decode($mat[2]);
2455                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
2456                         }
2457
2458                         if( $toclevel ) {
2459                                 $prevlevel = $level;
2460                                 $prevtoclevel = $toclevel;
2461                         }
2462                         $level = $matches[1][$headlineCount];
2463
2464                         if( $doNumberHeadings || $doShowToc ) {
2465
2466                                 if ( $level > $prevlevel ) {
2467                                         # Increase TOC level
2468                                         $toclevel++;
2469                                         $sublevelCount[$toclevel] = 0;
2470                                         $toc .= $sk->tocIndent();
2471                                 }
2472                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
2473                                         # Decrease TOC level, find level to jump to
2474
2475                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
2476                                                 # Can only go down to level 1
2477                                                 $toclevel = 1;
2478                                         } else {
2479                                                 for ($i = $toclevel; $i > 0; $i--) {
2480                                                         if ( $levelCount[$i] == $level ) {
2481                                                                 # Found last matching level
2482                                                                 $toclevel = $i;
2483                                                                 break;
2484                                                         }
2485                                                         elseif ( $levelCount[$i] < $level ) {
2486                                                                 # Found first matching level below current level
2487                                                                 $toclevel = $i + 1;
2488                                                                 break;
2489                                                         }
2490                                                 }
2491                                         }
2492
2493                                         $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
2494                                 }
2495                                 else {
2496                                         # No change in level, end TOC line
2497                                         $toc .= $sk->tocLineEnd();
2498                                 }
2499
2500                                 $levelCount[$toclevel] = $level;
2501
2502                                 # count number of headlines for each level
2503                                 @$sublevelCount[$toclevel]++;
2504                                 $dot = 0;
2505                                 for( $i = 1; $i <= $toclevel; $i++ ) {
2506                                         if( !empty( $sublevelCount[$i] ) ) {
2507                                                 if( $dot ) {
2508                                                         $numbering .= '.';
2509                                                 }
2510                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
2511                                                 $dot = 1;
2512                                         }
2513                                 }
2514                         }
2515
2516                         # The canonized header is a version of the header text safe to use for links
2517                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
2518                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
2519                         $canonized_headline = $this->unstripNoWiki( $canonized_headline, $this->mStripState );
2520
2521                         # Remove link placeholders by the link text.
2522                         #     <!--LINK number-->
2523                         # turns into
2524                         #     link text with suffix
2525                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
2526                                                             "\$this->mLinkHolders['texts'][\$1]",
2527                                                             $canonized_headline );
2528                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
2529                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
2530                                                             $canonized_headline );
2531
2532                         # strip out HTML
2533                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
2534                         $tocline = trim( $canonized_headline );
2535                         $canonized_headline = urlencode( Sanitizer::decodeCharReferences( str_replace(' ', '_', $tocline) ) );
2536                         $replacearray = array(
2537                                 '%3A' => ':',
2538                                 '%' => '.'
2539                         );
2540                         $canonized_headline = str_replace(array_keys($replacearray),array_values($replacearray),$canonized_headline);
2541                         $refers[$headlineCount] = $canonized_headline;
2542
2543                         # count how many in assoc. array so we can track dupes in anchors
2544                         @$refers[$canonized_headline]++;
2545                         $refcount[$headlineCount]=$refers[$canonized_headline];
2546
2547                         # Don't number the heading if it is the only one (looks silly)
2548                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
2549                                 # the two are different if the line contains a link
2550                                 $headline=$numbering . ' ' . $headline;
2551                         }
2552
2553                         # Create the anchor for linking from the TOC to the section
2554                         $anchor = $canonized_headline;
2555                         if($refcount[$headlineCount] > 1 ) {
2556                                 $anchor .= '_' . $refcount[$headlineCount];
2557                         }
2558                         if( $doShowToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
2559                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
2560                         }
2561                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
2562                                 if ( empty( $head[$headlineCount] ) ) {
2563                                         $head[$headlineCount] = '';
2564                                 }
2565                                 if( $istemplate )
2566                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
2567                                 else
2568                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1);
2569                         }
2570
2571                         # give headline the correct <h#> tag
2572                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline.'</h'.$level.'>';
2573
2574                         $headlineCount++;
2575                         if( !$istemplate )
2576                                 $sectionCount++;
2577                 }
2578
2579                 if( $doShowToc ) {
2580                         $toc .= $sk->tocUnindent( $toclevel - 1 );
2581                         $toc = $sk->tocList( $toc );
2582                 }
2583
2584                 # split up and insert constructed headlines
2585
2586                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
2587                 $i = 0;
2588
2589                 foreach( $blocks as $block ) {
2590                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
2591                                 # This is the [edit] link that appears for the top block of text when
2592                                 # section editing is enabled
2593
2594                                 # Disabled because it broke block formatting
2595                                 # For example, a bullet point in the top line
2596                                 # $full .= $sk->editSectionLink(0);
2597                         }
2598                         $full .= $block;
2599                         if( $doShowToc && !$i && $isMain && !$forceTocHere) {
2600                         # Top anchor now in skin
2601                                 $full = $full.$toc;
2602                         }
2603
2604                         if( !empty( $head[$i] ) ) {
2605                                 $full .= $head[$i];
2606                         }
2607                         $i++;
2608                 }
2609                 if($forceTocHere) {
2610                         $mw =& MagicWord::get( MAG_TOC );
2611                         return $mw->replace( $toc, $full );
2612                 } else {
2613                         return $full;
2614                 }
2615         }
2616
2617         /**
2618          * Return an HTML link for the "ISBN 123456" text
2619          * @access private
2620          */
2621         function magicISBN( $text ) {
2622                 $fname = 'Parser::magicISBN';
2623                 wfProfileIn( $fname );
2624
2625                 $a = split( 'ISBN ', ' '.$text );
2626                 if ( count ( $a ) < 2 ) {
2627                         wfProfileOut( $fname );
2628                         return $text;
2629                 }
2630                 $text = substr( array_shift( $a ), 1);
2631                 $valid = '0123456789-Xx';
2632
2633                 foreach ( $a as $x ) {
2634                         $isbn = $blank = '' ;
2635                         while ( ' ' == $x{0} ) {
2636                                 $blank .= ' ';
2637                                 $x = substr( $x, 1 );
2638                         }
2639                         if ( $x == '' ) { # blank isbn
2640                                 $text .= "ISBN $blank";
2641                                 continue;
2642                         }
2643                         while ( strstr( $valid, $x{0} ) != false ) {
2644                                 $isbn .= $x{0};
2645                                 $x = substr( $x, 1 );
2646                         }
2647                         $num = str_replace( '-', '', $isbn );
2648                         $num = str_replace( ' ', '', $num );
2649                         $num = str_replace( 'x', 'X', $num );
2650
2651                         if ( '' == $num ) {
2652                                 $text .= "ISBN $blank$x";
2653                         } else {
2654                                 $titleObj = Title::makeTitle( NS_SPECIAL, 'Booksources' );
2655                                 $text .= '<a href="' .
2656                                 $titleObj->escapeLocalUrl( 'isbn='.$num ) .
2657                                         "\" class=\"internal\">ISBN $isbn</a>";
2658                                 $text .= $x;
2659                         }
2660                 }
2661                 wfProfileOut( $fname );
2662                 return $text;
2663         }
2664
2665         /**
2666          * Return an HTML link for the "RFC 1234" text
2667          *
2668          * @access private
2669          * @param string $text     Text to be processed
2670          * @param string $keyword  Magic keyword to use (default RFC)
2671          * @param string $urlmsg   Interface message to use (default rfcurl)
2672          * @return string
2673          */
2674         function magicRFC( $text, $keyword='RFC ', $urlmsg='rfcurl'  ) {
2675
2676                 $valid = '0123456789';
2677                 $internal = false;
2678
2679                 $a = split( $keyword, ' '.$text );
2680                 if ( count ( $a ) < 2 ) {
2681                         return $text;
2682                 }
2683                 $text = substr( array_shift( $a ), 1);
2684
2685                 /* Check if keyword is preceed by [[.
2686                  * This test is made here cause of the array_shift above
2687                  * that prevent the test to be done in the foreach.
2688                  */
2689                 if ( substr( $text, -2 ) == '[[' ) {
2690                         $internal = true;
2691                 }
2692
2693                 foreach ( $a as $x ) {
2694                         /* token might be empty if we have RFC RFC 1234 */
2695                         if ( $x=='' ) {
2696                                 $text.=$keyword;
2697                                 continue;
2698                                 }
2699
2700                         $id = $blank = '' ;
2701
2702                         /** remove and save whitespaces in $blank */
2703                         while ( $x{0} == ' ' ) {
2704                                 $blank .= ' ';
2705                                 $x = substr( $x, 1 );
2706                         }
2707
2708                         /** remove and save the rfc number in $id */
2709                         while ( strstr( $valid, $x{0} ) != false ) {
2710                                 $id .= $x{0};
2711                                 $x = substr( $x, 1 );
2712                         }
2713
2714                         if ( $id == '' ) {
2715                                 /* call back stripped spaces*/
2716                                 $text .= $keyword.$blank.$x;
2717                         } elseif( $internal ) {
2718                                 /* normal link */
2719                                 $text .= $keyword.$id.$x;
2720                         } else {
2721                                 /* build the external link*/
2722                                 $url = wfMsg( $urlmsg, $id);
2723                                 $sk =& $this->mOptions->getSkin();
2724                                 $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
2725                                 $text .= "<a href='{$url}'{$la}>{$keyword}{$id}</a>{$x}";
2726                         }
2727
2728                         /* Check if the next RFC keyword is preceed by [[ */
2729                         $internal = ( substr($x,-2) == '[[' );
2730                 }
2731                 return $text;
2732         }
2733
2734         /**
2735          * Transform wiki markup when saving a page by doing \r\n -> \n
2736          * conversion, substitting signatures, {{subst:}} templates, etc.
2737          *
2738          * @param string $text the text to transform
2739          * @param Title &$title the Title object for the current article
2740          * @param User &$user the User object describing the current user
2741          * @param ParserOptions $options parsing options
2742          * @param bool $clearState whether to clear the parser state first
2743          * @return string the altered wiki markup
2744          * @access public
2745          */
2746         function preSaveTransform( $text, &$title, &$user, $options, $clearState = true ) {
2747                 $this->mOptions = $options;
2748                 $this->mTitle =& $title;
2749                 $this->mOutputType = OT_WIKI;
2750
2751                 if ( $clearState ) {
2752                         $this->clearState();
2753                 }
2754
2755                 $stripState = false;
2756                 $pairs = array(
2757                         "\r\n" => "\n",
2758                 );
2759                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
2760                 $text = $this->strip( $text, $stripState, false );
2761                 $text = $this->pstPass2( $text, $user );
2762                 $text = $this->unstrip( $text, $stripState );
2763                 $text = $this->unstripNoWiki( $text, $stripState );
2764                 return $text;
2765         }
2766
2767         /**
2768          * Pre-save transform helper function
2769          * @access private
2770          */
2771         function pstPass2( $text, &$user ) {
2772                 global $wgContLang, $wgLocaltimezone;
2773
2774                 # Variable replacement
2775                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
2776                 $text = $this->replaceVariables( $text );
2777
2778                 # Signatures
2779                 #
2780                 $n = $user->getName();
2781                 $k = $user->getOption( 'nickname' );
2782                 if ( '' == $k ) { $k = $n; }
2783                 if ( isset( $wgLocaltimezone ) ) {
2784                         $oldtz = getenv( 'TZ' );
2785                         putenv( 'TZ='.$wgLocaltimezone );
2786                 }
2787
2788                 /* Note: This is the timestamp saved as hardcoded wikitext to
2789                  * the database, we use $wgContLang here in order to give
2790                  * everyone the same signiture and use the default one rather
2791                  * than the one selected in each users preferences.
2792                  */
2793                 $d = $wgContLang->timeanddate( wfTimestampNow(), false, false) .
2794                   ' (' . date( 'T' ) . ')';
2795                 if ( isset( $wgLocaltimezone ) ) {
2796                         putenv( 'TZ='.$oldtz );
2797                 }
2798
2799                 if( $user->getOption( 'fancysig' ) ) {
2800                         $sigText = $k;
2801                 } else {
2802                         $sigText = '[[' . $wgContLang->getNsText( NS_USER ) . ":$n|$k]]";
2803                 }
2804                 $text = preg_replace( '/~~~~~/', $d, $text );
2805                 $text = preg_replace( '/~~~~/', "$sigText $d", $text );
2806                 $text = preg_replace( '/~~~/', $sigText, $text );
2807
2808                 # Context links: [[|name]] and [[name (context)|]]
2809                 #
2810                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
2811                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
2812                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
2813                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
2814
2815                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
2816                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
2817                 $p3 = "/\[\[(:*$namespacechar+):({$np}+)\\|]]/";                # [[namespace:page|]] and [[:namespace:page|]]
2818                 $p4 = "/\[\[(:*$namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/"; # [[ns:page (cont)|]] and [[:ns:page (cont)|]]
2819                 $context = '';
2820                 $t = $this->mTitle->getText();
2821                 if ( preg_match( $conpat, $t, $m ) ) {
2822                         $context = $m[2];
2823                 }
2824                 $text = preg_replace( $p4, '[[\\1:\\2 (\\3)|\\2]]', $text );
2825                 $text = preg_replace( $p1, '[[\\1 (\\2)|\\1]]', $text );
2826                 $text = preg_replace( $p3, '[[\\1:\\2|\\2]]', $text );
2827
2828                 if ( '' == $context ) {
2829                         $text = preg_replace( $p2, '[[\\1]]', $text );
2830                 } else {
2831                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
2832                 }
2833
2834                 # Trim trailing whitespace
2835                 # MAG_END (__END__) tag allows for trailing
2836                 # whitespace to be deliberately included
2837                 $text = rtrim( $text );
2838                 $mw =& MagicWord::get( MAG_END );
2839                 $mw->matchAndRemove( $text );
2840
2841                 return $text;
2842         }
2843
2844         /**
2845          * Set up some variables which are usually set up in parse()
2846          * so that an external function can call some class members with confidence
2847          * @access public
2848          */
2849         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
2850                 $this->mTitle =& $title;
2851                 $this->mOptions = $options;
2852                 $this->mOutputType = $outputType;
2853                 if ( $clearState ) {
2854                         $this->clearState();
2855                 }
2856         }
2857
2858         /**
2859          * Transform a MediaWiki message by replacing magic variables.
2860          *
2861          * @param string $text the text to transform
2862          * @param ParserOptions $options  options
2863          * @return string the text with variables substituted
2864          * @access public
2865          */
2866         function transformMsg( $text, $options ) {
2867                 global $wgTitle;
2868                 static $executing = false;
2869
2870                 # Guard against infinite recursion
2871                 if ( $executing ) {
2872                         return $text;
2873                 }
2874                 $executing = true;
2875
2876                 $this->mTitle = $wgTitle;
2877                 $this->mOptions = $options;
2878                 $this->mOutputType = OT_MSG;
2879                 $this->clearState();
2880                 $text = $this->replaceVariables( $text );
2881
2882                 $executing = false;
2883                 return $text;
2884         }
2885
2886         /**
2887          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
2888          * Callback will be called with the text within
2889          * Transform and return the text within
2890          * @access public
2891          */
2892         function setHook( $tag, $callback ) {
2893                 $oldVal = @$this->mTagHooks[$tag];
2894                 $this->mTagHooks[$tag] = $callback;
2895                 return $oldVal;
2896         }
2897
2898         /**
2899          * Replace <!--LINK--> link placeholders with actual links, in the buffer
2900          * Placeholders created in Skin::makeLinkObj()
2901          * Returns an array of links found, indexed by PDBK:
2902          *  0 - broken
2903          *  1 - normal link
2904          *  2 - stub
2905          * $options is a bit field, RLH_FOR_UPDATE to select for update
2906          */
2907         function replaceLinkHolders( &$text, $options = 0 ) {
2908                 global $wgUser, $wgLinkCache;
2909                 global $wgOutputReplace;
2910
2911                 $fname = 'Parser::replaceLinkHolders';
2912                 wfProfileIn( $fname );
2913
2914                 $pdbks = array();
2915                 $colours = array();
2916                 $sk = $this->mOptions->getSkin();
2917
2918                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
2919                         wfProfileIn( $fname.'-check' );
2920                         $dbr =& wfGetDB( DB_SLAVE );
2921                         $page = $dbr->tableName( 'page' );
2922                         $threshold = $wgUser->getOption('stubthreshold');
2923
2924                         # Sort by namespace
2925                         asort( $this->mLinkHolders['namespaces'] );
2926
2927                         # Generate query
2928                         $query = false;
2929                         foreach ( $this->mLinkHolders['namespaces'] as $key => $val ) {
2930                                 # Make title object
2931                                 $title = $this->mLinkHolders['titles'][$key];
2932
2933                                 # Skip invalid entries.
2934                                 # Result will be ugly, but prevents crash.
2935                                 if ( is_null( $title ) ) {
2936                                         continue;
2937                                 }
2938                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
2939
2940                                 # Check if it's in the link cache already
2941                                 if ( $wgLinkCache->getGoodLinkID( $pdbk ) ) {
2942                                         $colours[$pdbk] = 1;
2943                                 } elseif ( $wgLinkCache->isBadLink( $pdbk ) ) {
2944                                         $colours[$pdbk] = 0;
2945                                 } else {
2946                                         # Not in the link cache, add it to the query
2947                                         if ( !isset( $current ) ) {
2948                                                 $current = $val;
2949                                                 $query =  "SELECT page_id, page_namespace, page_title";
2950                                                 if ( $threshold > 0 ) {
2951                                                         $query .= ', page_len, page_is_redirect';
2952                                                 }
2953                                                 $query .= " FROM $page WHERE (page_namespace=$val AND page_title IN(";
2954                                         } elseif ( $current != $val ) {
2955                                                 $current = $val;
2956                                                 $query .= ")) OR (page_namespace=$val AND page_title IN(";
2957                                         } else {
2958                                                 $query .= ', ';
2959                                         }
2960
2961                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
2962                                 }
2963                         }
2964                         if ( $query ) {
2965                                 $query .= '))';
2966                                 if ( $options & RLH_FOR_UPDATE ) {
2967                                         $query .= ' FOR UPDATE';
2968                                 }
2969
2970                                 $res = $dbr->query( $query, $fname );
2971
2972                                 # Fetch data and form into an associative array
2973                                 # non-existent = broken
2974                                 # 1 = known
2975                                 # 2 = stub
2976                                 while ( $s = $dbr->fetchObject($res) ) {
2977                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
2978                                         $pdbk = $title->getPrefixedDBkey();
2979                                         $wgLinkCache->addGoodLinkObj( $s->page_id, $title );
2980
2981                                         if ( $threshold >  0 ) {
2982                                                 $size = $s->page_len;
2983                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
2984                                                         $colours[$pdbk] = 1;
2985                                                 } else {
2986                                                         $colours[$pdbk] = 2;
2987                                                 }
2988                                         } else {
2989                                                 $colours[$pdbk] = 1;
2990                                         }
2991                                 }
2992                         }
2993                         wfProfileOut( $fname.'-check' );
2994
2995                         # Construct search and replace arrays
2996                         wfProfileIn( $fname.'-construct' );
2997                         $wgOutputReplace = array();
2998                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
2999                                 $pdbk = $pdbks[$key];
3000                                 $searchkey = "<!--LINK $key-->";
3001                                 $title = $this->mLinkHolders['titles'][$key];
3002                                 if ( empty( $colours[$pdbk] ) ) {
3003                                         $wgLinkCache->addBadLinkObj( $title );
3004                                         $colours[$pdbk] = 0;
3005                                         $wgOutputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
3006                                                                         $this->mLinkHolders['texts'][$key],
3007                                                                         $this->mLinkHolders['queries'][$key] );
3008                                 } elseif ( $colours[$pdbk] == 1 ) {
3009                                         $wgOutputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
3010                                                                         $this->mLinkHolders['texts'][$key],
3011                                                                         $this->mLinkHolders['queries'][$key] );
3012                                 } elseif ( $colours[$pdbk] == 2 ) {
3013                                         $wgOutputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
3014                                                                         $this->mLinkHolders['texts'][$key],
3015                                                                         $this->mLinkHolders['queries'][$key] );
3016                                 }
3017                         }
3018                         wfProfileOut( $fname.'-construct' );
3019
3020                         # Do the thing
3021                         wfProfileIn( $fname.'-replace' );
3022
3023                         $text = preg_replace_callback(
3024                                 '/(<!--LINK .*?-->)/',
3025                                 "wfOutputReplaceMatches",
3026                                 $text);
3027
3028                         wfProfileOut( $fname.'-replace' );
3029                 }
3030
3031                 # Now process interwiki link holders
3032                 # This is quite a bit simpler than internal links
3033                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
3034                         wfProfileIn( $fname.'-interwiki' );
3035                         # Make interwiki link HTML
3036                         $wgOutputReplace = array();
3037                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
3038                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
3039                                 $wgOutputReplace[$key] = $sk->makeLinkObj( $title, $link );
3040                         }
3041
3042                         $text = preg_replace_callback(
3043                                 '/<!--IWLINK (.*?)-->/',
3044                                 "wfOutputReplaceMatches",
3045                                 $text );
3046                         wfProfileOut( $fname.'-interwiki' );
3047                 }
3048
3049                 wfProfileOut( $fname );
3050                 return $colours;
3051         }
3052
3053         /**
3054          * Replace <!--LINK--> link placeholders with plain text of links
3055          * (not HTML-formatted).
3056          * @param string $text
3057          * @return string
3058          */
3059         function replaceLinkHoldersText( $text ) {
3060                 global $wgUser, $wgLinkCache;
3061                 global $wgOutputReplace;
3062
3063                 $fname = 'Parser::replaceLinkHoldersText';
3064                 wfProfileIn( $fname );
3065
3066                 $text = preg_replace_callback(
3067                         '/<!--(LINK|IWLINK) (.*?)-->/',
3068                         array( &$this, 'replaceLinkHoldersTextCallback' ),
3069                         $text );
3070
3071                 wfProfileOut( $fname );
3072                 return $text;
3073         }
3074
3075         /**
3076          * @param array $matches
3077          * @return string
3078          * @access private
3079          */
3080         function replaceLinkHoldersTextCallback( $matches ) {
3081                 $type = $matches[1];
3082                 $key  = $matches[2];
3083                 if( $type == 'LINK' ) {
3084                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
3085                                 return $this->mLinkHolders['texts'][$key];
3086                         }
3087                 } elseif( $type == 'IWLINK' ) {
3088                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
3089                                 return $this->mInterwikiLinkHolders['texts'][$key];
3090                         }
3091                 }
3092                 return $matches[0];
3093         }
3094
3095         /**
3096          * Renders an image gallery from a text with one line per image.
3097          * text labels may be given by using |-style alternative text. E.g.
3098          *   Image:one.jpg|The number "1"
3099          *   Image:tree.jpg|A tree
3100          * given as text will return the HTML of a gallery with two images,
3101          * labeled 'The number "1"' and
3102          * 'A tree'.
3103          *
3104          * @static
3105          */
3106         function renderImageGallery( $text ) {
3107                 # Setup the parser
3108                 global $wgUser, $wgTitle;
3109                 $parserOptions = ParserOptions::newFromUser( $wgUser );
3110                 $localParser = new Parser();
3111
3112                 global $wgLinkCache;
3113                 $ig = new ImageGallery();
3114                 $ig->setShowBytes( false );
3115                 $ig->setShowFilename( false );
3116                 $lines = explode( "\n", $text );
3117
3118                 foreach ( $lines as $line ) {
3119                         # match lines like these:
3120                         # Image:someimage.jpg|This is some image
3121                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
3122                         # Skip empty lines
3123                         if ( count( $matches ) == 0 ) {
3124                                 continue;
3125                         }
3126                         $nt = Title::newFromURL( $matches[1] );
3127                         if( is_null( $nt ) ) {
3128                                 # Bogus title. Ignore these so we don't bomb out later.
3129                                 continue;
3130                         }
3131                         if ( isset( $matches[3] ) ) {
3132                                 $label = $matches[3];
3133                         } else {
3134                                 $label = '';
3135                         }
3136
3137                         $html = $localParser->parse( $label , $wgTitle, $parserOptions );
3138                         $html = $html->mText;
3139
3140                         $ig->add( new Image( $nt ), $html );
3141                         $wgLinkCache->addImageLinkObj( $nt );
3142                 }
3143                 return $ig->toHTML();
3144         }
3145
3146         /**
3147          * Parse image options text and use it to make an image
3148          */
3149         function makeImage( &$nt, $options ) {
3150                 global $wgContLang, $wgUseImageResize;
3151                 global $wgUser, $wgThumbLimits;
3152
3153                 $align = '';
3154
3155                 # Check if the options text is of the form "options|alt text"
3156                 # Options are:
3157                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
3158                 #  * left               no resizing, just left align. label is used for alt= only
3159                 #  * right              same, but right aligned
3160                 #  * none               same, but not aligned
3161                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
3162                 #  * center             center the image
3163                 #  * framed             Keep original image size, no magnify-button.
3164
3165                 $part = explode( '|', $options);
3166
3167                 $mwThumb  =& MagicWord::get( MAG_IMG_THUMBNAIL );
3168                 $mwLeft   =& MagicWord::get( MAG_IMG_LEFT );
3169                 $mwRight  =& MagicWord::get( MAG_IMG_RIGHT );
3170                 $mwNone   =& MagicWord::get( MAG_IMG_NONE );
3171                 $mwWidth  =& MagicWord::get( MAG_IMG_WIDTH );
3172                 $mwCenter =& MagicWord::get( MAG_IMG_CENTER );
3173                 $mwFramed =& MagicWord::get( MAG_IMG_FRAMED );
3174                 $caption = '';
3175
3176                 $width = $height = $framed = $thumb = false;
3177                 $manual_thumb = "" ;
3178
3179                 foreach( $part as $key => $val ) {
3180                         $val_parts = explode ( "=" , $val , 2 ) ;
3181                         $left_part = array_shift ( $val_parts ) ;
3182                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
3183                                 $thumb=true;
3184                         } elseif ( $wgUseImageResize && count ( $val_parts ) == 1 && ! is_null( $mwThumb->matchVariableStartToEnd($left_part) ) ) {
3185                                 # use manually specified thumbnail
3186                                 $thumb=true;
3187                                 $manual_thumb = array_shift ( $val_parts ) ;
3188                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
3189                                 # remember to set an alignment, don't render immediately
3190                                 $align = 'right';
3191                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
3192                                 # remember to set an alignment, don't render immediately
3193                                 $align = 'left';
3194                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
3195                                 # remember to set an alignment, don't render immediately
3196                                 $align = 'center';
3197                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
3198                                 # remember to set an alignment, don't render immediately
3199                                 $align = 'none';
3200                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
3201                                 wfDebug( "MAG_IMG_WIDTH match: $match\n" );
3202                                 # $match is the image width in pixels
3203                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
3204                                         $width = intval( $m[1] );
3205                                         $height = intval( $m[2] );
3206                                 } else {
3207                                         $width = intval($match);
3208                                 }
3209                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
3210                                 $framed=true;
3211                         } else {
3212                                 $caption = $val;
3213                         }
3214                 }
3215                 # Strip bad stuff out of the alt text
3216                 $alt = $this->replaceLinkHoldersText( $caption );
3217                 $alt = Sanitizer::stripAllTags( $alt );
3218
3219                 # Linker does the rest
3220                 $sk =& $this->mOptions->getSkin();
3221                 return $sk->makeImageLinkObj( $nt, $caption, $alt, $align, $width, $height, $framed, $thumb, $manual_thumb );
3222         }
3223 }
3224
3225 /**
3226  * @todo document
3227  * @package MediaWiki
3228  */
3229 class ParserOutput
3230 {
3231         var $mText, $mLanguageLinks, $mCategoryLinks, $mContainsOldMagic;
3232         var $mCacheTime; # Timestamp on this article, or -1 for uncacheable. Used in ParserCache.
3233         var $mVersion;   # Compatibility check
3234         var $mTitleText; # title text of the chosen language variant
3235
3236         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
3237                 $containsOldMagic = false, $titletext = '' )
3238         {
3239                 $this->mText = $text;
3240                 $this->mLanguageLinks = $languageLinks;
3241                 $this->mCategoryLinks = $categoryLinks;
3242                 $this->mContainsOldMagic = $containsOldMagic;
3243                 $this->mCacheTime = '';
3244                 $this->mVersion = MW_PARSER_VERSION;
3245                 $this->mTitleText = $titletext;
3246         }
3247
3248         function getText()                   { return $this->mText; }
3249         function getLanguageLinks()          { return $this->mLanguageLinks; }
3250         function getCategoryLinks()          { return array_keys( $this->mCategoryLinks ); }
3251         function getCacheTime()              { return $this->mCacheTime; }
3252         function getTitleText()              { return $this->mTitleText; }
3253         function containsOldMagic()          { return $this->mContainsOldMagic; }
3254         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
3255         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
3256         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategoryLinks, $cl ); }
3257         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
3258         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
3259         function setTitleText( $t )          { return wfSetVar ($this->mTitleText, $t); }
3260
3261         function addCategoryLink( $c )       { $this->mCategoryLinks[$c] = 1; }
3262
3263         function merge( $other ) {
3264                 $this->mLanguageLinks = array_merge( $this->mLanguageLinks, $other->mLanguageLinks );
3265                 $this->mCategoryLinks = array_merge( $this->mCategoryLinks, $this->mLanguageLinks );
3266                 $this->mContainsOldMagic = $this->mContainsOldMagic || $other->mContainsOldMagic;
3267         }
3268
3269         /**
3270          * Return true if this cached output object predates the global or
3271          * per-article cache invalidation timestamps, or if it comes from
3272          * an incompatible older version.
3273          *
3274          * @param string $touched the affected article's last touched timestamp
3275          * @return bool
3276          * @access public
3277          */
3278         function expired( $touched ) {
3279                 global $wgCacheEpoch;
3280                 return $this->getCacheTime() == -1 || // parser says it's uncacheable
3281                        $this->getCacheTime() <= $touched ||
3282                        $this->getCacheTime() <= $wgCacheEpoch ||
3283                        !isset( $this->mVersion ) ||
3284                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
3285         }
3286 }
3287
3288 /**
3289  * Set options of the Parser
3290  * @todo document
3291  * @package MediaWiki
3292  */
3293 class ParserOptions
3294 {
3295         # All variables are private
3296         var $mUseTeX;                    # Use texvc to expand <math> tags
3297         var $mUseDynamicDates;           # Use DateFormatter to format dates
3298         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
3299         var $mAllowExternalImages;       # Allow external images inline
3300         var $mSkin;                      # Reference to the preferred skin
3301         var $mDateFormat;                # Date format index
3302         var $mEditSection;               # Create "edit section" links
3303         var $mNumberHeadings;            # Automatically number headings
3304         var $mAllowSpecialInclusion;     # Allow inclusion of special pages
3305
3306         function getUseTeX()                        { return $this->mUseTeX; }
3307         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
3308         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
3309         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
3310         function getSkin()                          { return $this->mSkin; }
3311         function getDateFormat()                    { return $this->mDateFormat; }
3312         function getEditSection()                   { return $this->mEditSection; }
3313         function getNumberHeadings()                { return $this->mNumberHeadings; }
3314         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
3315
3316
3317         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
3318         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
3319         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
3320         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
3321         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
3322         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
3323         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
3324         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
3325
3326         function setSkin( &$x ) { $this->mSkin =& $x; }
3327
3328         function ParserOptions() {
3329                 global $wgUser;
3330                 $this->initialiseFromUser( $wgUser );
3331         }
3332
3333         /**
3334          * Get parser options
3335          * @static
3336          */
3337         function newFromUser( &$user ) {
3338                 $popts = new ParserOptions;
3339                 $popts->initialiseFromUser( $user );
3340                 return $popts;
3341         }
3342
3343         /** Get user options */
3344         function initialiseFromUser( &$userInput ) {
3345                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages,
3346                        $wgAllowSpecialInclusion;
3347                 $fname = 'ParserOptions::initialiseFromUser';
3348                 wfProfileIn( $fname );
3349                 if ( !$userInput ) {
3350                         $user = new User;
3351                         $user->setLoaded( true );
3352                 } else {
3353                         $user =& $userInput;
3354                 }
3355
3356                 $this->mUseTeX = $wgUseTeX;
3357                 $this->mUseDynamicDates = $wgUseDynamicDates;
3358                 $this->mInterwikiMagic = $wgInterwikiMagic;
3359                 $this->mAllowExternalImages = $wgAllowExternalImages;
3360                 wfProfileIn( $fname.'-skin' );
3361                 $this->mSkin =& $user->getSkin();
3362                 wfProfileOut( $fname.'-skin' );
3363                 $this->mDateFormat = $user->getOption( 'date' );
3364                 $this->mEditSection = $user->getOption( 'editsection' );
3365                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
3366                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
3367                 wfProfileOut( $fname );
3368         }
3369 }
3370
3371 /**
3372  * Callback function used by Parser::replaceLinkHolders()
3373  * to substitute link placeholders.
3374  */
3375 function &wfOutputReplaceMatches( $matches ) {
3376         global $wgOutputReplace;
3377         return $wgOutputReplace[$matches[1]];
3378 }
3379
3380 /**
3381  * Return the total number of articles
3382  */
3383 function wfNumberOfArticles() {
3384         global $wgNumberOfArticles;
3385
3386         wfLoadSiteStats();
3387         return $wgNumberOfArticles;
3388 }
3389
3390 /**
3391  * Get various statistics from the database
3392  * @private
3393  */
3394 function wfLoadSiteStats() {
3395         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
3396         $fname = 'wfLoadSiteStats';
3397
3398         if ( -1 != $wgNumberOfArticles ) return;
3399         $dbr =& wfGetDB( DB_SLAVE );
3400         $s = $dbr->selectRow( 'site_stats',
3401                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
3402                 array( 'ss_row_id' => 1 ), $fname
3403         );
3404
3405         if ( $s === false ) {
3406                 return;
3407         } else {
3408                 $wgTotalViews = $s->ss_total_views;
3409                 $wgTotalEdits = $s->ss_total_edits;
3410                 $wgNumberOfArticles = $s->ss_good_articles;
3411         }
3412 }
3413
3414 /**
3415  * Escape html tags
3416  * Basicly replacing " > and < with HTML entities ( &quot;, &gt;, &lt;)
3417  *
3418  * @param string $in Text that might contain HTML tags
3419  * @return string Escaped string
3420  */
3421 function wfEscapeHTMLTagsOnly( $in ) {
3422         return str_replace(
3423                 array( '"', '>', '<' ),
3424                 array( '&quot;', '&gt;', '&lt;' ),
3425                 $in );
3426 }
3427
3428 ?>