includes/Parser.php

   1 <?php
   2
   3 /**
   4  * File for Parser and related classes
   5  *
   6  * @package MediaWiki
   7  * @version $Id$
   8  */
   9
  10 /**
  11  * Variable substitution O(N^2) attack
  12  *
  13  * Without countermeasures, it would be possible to attack the parser by saving
  14  * a page filled with a large number of inclusions of large pages. The size of
  15  * the generated page would be proportional to the square of the input size.
  16  * Hence, we limit the number of inclusions of any given page, thus bringing any
  17  * attack back to O(N).
  18  */
  19 define( 'MAX_INCLUDE_REPEAT', 100 );
  20 define( 'MAX_INCLUDE_SIZE', 1000000 ); // 1 Million
  21
  22 # Allowed values for $mOutputType
  23 define( 'OT_HTML', 1 );
  24 define( 'OT_WIKI', 2 );
  25 define( 'OT_MSG' , 3 );
  26
  27 # string parameter for extractTags which will cause it
  28 # to strip HTML comments in addition to regular
  29 # <XML>-style tags. This should not be anything we
  30 # may want to use in wikisyntax
  31 define( 'STRIP_COMMENTS', 'HTMLCommentStrip' );
  32
  33 # prefix for escaping, used in two functions at least
  34 define( 'UNIQ_PREFIX', 'NaodW29');
  35
  36 # Constants needed for external link processing
  37 define( 'URL_PROTOCOLS', 'http|https|ftp|irc|gopher|news|mailto' );
  38 define( 'HTTP_PROTOCOLS', 'http|https' );
  39 # Everything except bracket, space, or control characters
  40 define( 'EXT_LINK_URL_CLASS', '[^]\\x00-\\x20\\x7F]' );
  41 define( 'INVERSE_EXT_LINK_URL_CLASS', '[\]\\x00-\\x20\\x7F]' );
  42 # Including space
  43 define( 'EXT_LINK_TEXT_CLASS', '[^\]\\x00-\\x1F\\x7F]' );
  44 define( 'EXT_IMAGE_FNAME_CLASS', '[A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]' );
  45 define( 'EXT_IMAGE_EXTENSIONS', 'gif|png|jpg|jpeg' );
  46 define( 'EXT_LINK_BRACKETED',  '/\[(('.URL_PROTOCOLS.'):'.EXT_LINK_URL_CLASS.'+) *('.EXT_LINK_TEXT_CLASS.'*?)\]/S' );
  47 define( 'EXT_IMAGE_REGEX',
  48         '/^('.HTTP_PROTOCOLS.':)'.  # Protocol
  49         '('.EXT_LINK_URL_CLASS.'+)\\/'.  # Hostname and path
  50         '('.EXT_IMAGE_FNAME_CLASS.'+)\\.((?i)'.EXT_IMAGE_EXTENSIONS.')$/S' # Filename
  51 );
  52
  53 /**
  54  * PHP Parser
  55  *
  56  * Processes wiki markup
  57  *
  58  * <pre>
  59  * There are three main entry points into the Parser class:
  60  * parse()
  61  *   produces HTML output
  62  * preSaveTransform().
  63  *   produces altered wiki markup.
  64  * transformMsg()
  65  *   performs brace substitution on MediaWiki messages
  66  *
  67  * Globals used:
  68  *    objects:   $wgLang, $wgDateFormatter, $wgLinkCache, $wgCurParser
  69  *
  70  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  71  *
  72  * settings:
  73  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  74  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  75  *  $wgLocaltimezone
  76  *
  77  *  * only within ParserOptions
  78  * </pre>
  79  *
  80  * @package MediaWiki
  81  */
  82 class Parser
  83 {
  84         /**#@+
  85          * @access private
  86          */
  87         # Persistent:
  88         var $mTagHooks;
  89
  90         # Cleared with clearState():
  91         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
  92         var $mVariables, $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
  93
  94         # Temporary:
  95         var $mOptions, $mTitle, $mOutputType,
  96             $mTemplates,        // cache of already loaded templates, avoids
  97                                 // multiple SQL queries for the same string
  98             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
  99                                 // in this path. Used for loop detection.
 100
 101         /**#@-*/
 102
 103         /**
 104          * Constructor
 105          *
 106          * @access public
 107          */
 108         function Parser() {
 109                 $this->mTemplates = array();
 110                 $this->mTemplatePath = array();
 111                 $this->mTagHooks = array();
 112                 $this->clearState();
 113         }
 114
 115         /**
 116          * Clear Parser state
 117          *
 118          * @access private
 119          */
 120         function clearState() {
 121                 $this->mOutput = new ParserOutput;
 122                 $this->mAutonumber = 0;
 123                 $this->mLastSection = "";
 124                 $this->mDTopen = false;
 125                 $this->mVariables = false;
 126                 $this->mIncludeCount = array();
 127                 $this->mStripState = array();
 128                 $this->mArgStack = array();
 129                 $this->mInPre = false;
 130         }
 131
 132         /**
 133          * First pass--just handle <nowiki> sections, pass the rest off
 134          * to internalParse() which does all the real work.
 135          *
 136          * @access private
 137          * @return ParserOutput a ParserOutput
 138          */
 139         function parse( $text, &$title, $options, $linestart = true, $clearState = true ) {
 140                 global $wgUseTidy;
 141                 $fname = 'Parser::parse';
 142                 wfProfileIn( $fname );
 143
 144                 if ( $clearState ) {
 145                         $this->clearState();
 146                 }
 147
 148                 $this->mOptions = $options;
 149                 $this->mTitle =& $title;
 150                 $this->mOutputType = OT_HTML;
 151
 152                 $stripState = NULL;
 153                 $text = $this->strip( $text, $this->mStripState );
 154                 $text = $this->internalParse( $text, $linestart );
 155                 $text = $this->unstrip( $text, $this->mStripState );
 156                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 157                 if(!$wgUseTidy) {
 158                         $fixtags = array(
 159                                 # french spaces, last one Guillemet-left
 160                                 # only if there is something before the space
 161                                 '/(.) (?=\\?|:|;|!|\\302\\273)/i' => '\\1&nbsp;\\2',
 162                                 # french spaces, Guillemet-right
 163                                 "/(\\302\\253) /i"=>"\\1&nbsp;",
 164                                 '/<hr *>/i' => '<hr />',
 165                                 '/<br *>/i' => '<br />',
 166                                 '/<center *>/i' => '<div class="center">',
 167                                 '/<\\/center *>/i' => '</div>',
 168                                 # Clean up spare ampersands; note that we probably ought to be
 169                                 # more careful about named entities.
 170                                 '/&(?!:amp;|#[Xx][0-9A-fa-f]+;|#[0-9]+;|[a-zA-Z0-9]+;)/' => '&amp;'
 171                         );
 172                         $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 173                 } else {
 174                         $fixtags = array(
 175                                 # french spaces, last one Guillemet-left
 176                                 '/ (\\?|:|;|!|\\302\\273)/i' => '&nbsp;\\1',
 177                                 # french spaces, Guillemet-right
 178                                 '/(\\302\\253) /i' => '\\1&nbsp;',
 179                                 '/<center *>/i' => '<div class="center">',
 180                                 '/<\\/center *>/i' => '</div>'
 181                         );
 182                         $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 183                 }
 184                 # only once and last
 185                 $text = $this->doBlockLevels( $text, $linestart );
 186                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 187                 if($wgUseTidy) {
 188                         $text = $this->tidy($text);
 189                 }
 190                 $this->mOutput->setText( $text );
 191                 wfProfileOut( $fname );
 192                 return $this->mOutput;
 193         }
 194
 195         /**
 196          * Get a random string
 197          *
 198          * @access private
 199          * @static
 200          */
 201         function getRandomString() {
 202                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 203         }
 204
 205         /**
 206          * Replaces all occurrences of <$tag>content</$tag> in the text
 207          * with a random marker and returns the new text. the output parameter
 208          * $content will be an associative array filled with data on the form
 209          * $unique_marker => content.
 210          *
 211          * If $content is already set, the additional entries will be appended
 212          * If $tag is set to STRIP_COMMENTS, the function will extract
 213          * <!-- HTML comments -->
 214          *
 215          * @access private
 216          * @static
 217          */
 218         function extractTags($tag, $text, &$content, $uniq_prefix = ''){
 219                 $rnd = $uniq_prefix . '-' . $tag . Parser::getRandomString();
 220                 if ( !$content ) {
 221                         $content = array( );
 222                 }
 223                 $n = 1;
 224                 $stripped = '';
 225
 226                 while ( '' != $text ) {
 227                         if($tag==STRIP_COMMENTS) {
 228                                 $p = preg_split( '/<!--/i', $text, 2 );
 229                         } else {
 230                                 $p = preg_split( "/<\\s*$tag\\s*>/i", $text, 2 );
 231                         }
 232                         $stripped .= $p[0];
 233                         if ( ( count( $p ) < 2 ) || ( '' == $p[1] ) ) {
 234                                 $text = '';
 235                         } else {
 236                                 if($tag==STRIP_COMMENTS) {
 237                                         $q = preg_split( '/-->/i', $p[1], 2 );
 238                                 } else {
 239                                         $q = preg_split( "/<\\/\\s*$tag\\s*>/i", $p[1], 2 );
 240                                 }
 241                                 $marker = $rnd . sprintf('%08X', $n++);
 242                                 $content[$marker] = $q[0];
 243                                 $stripped .= $marker;
 244                                 $text = $q[1];
 245                         }
 246                 }
 247                 return $stripped;
 248         }
 249
 250         /**
 251          * Strips and renders nowiki, pre, math, hiero
 252          * If $render is set, performs necessary rendering operations on plugins
 253          * Returns the text, and fills an array with data needed in unstrip()
 254          * If the $state is already a valid strip state, it adds to the state
 255          *
 256          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 257          *  will be stripped in addition to other tags. This is important
 258          *  for section editing, where these comments cause confusion when
 259          *  counting the sections in the wikisource
 260          *
 261          * @access private
 262          */
 263         function strip( $text, &$state, $stripcomments = false ) {
 264                 $render = ($this->mOutputType == OT_HTML);
 265                 $html_content = array();
 266                 $nowiki_content = array();
 267                 $math_content = array();
 268                 $pre_content = array();
 269                 $comment_content = array();
 270                 $ext_content = array();
 271
 272                 # Replace any instances of the placeholders
 273                 $uniq_prefix = UNIQ_PREFIX;
 274                 #$text = str_replace( $uniq_prefix, wfHtmlEscapeFirst( $uniq_prefix ), $text );
 275
 276                 # html
 277                 global $wgRawHtml, $wgWhitelistEdit;
 278                 if( $wgRawHtml && $wgWhitelistEdit ) {
 279                         $text = Parser::extractTags('html', $text, $html_content, $uniq_prefix);
 280                         foreach( $html_content as $marker => $content ) {
 281                                 if ($render ) {
 282                                         # Raw and unchecked for validity.
 283                                         $html_content[$marker] = $content;
 284                                 } else {
 285                                         $html_content[$marker] = '<html>'.$content.'</html>';
 286                                 }
 287                         }
 288                 }
 289
 290                 # nowiki
 291                 $text = Parser::extractTags('nowiki', $text, $nowiki_content, $uniq_prefix);
 292                 foreach( $nowiki_content as $marker => $content ) {
 293                         if( $render ){
 294                                 $nowiki_content[$marker] = wfEscapeHTMLTagsOnly( $content );
 295                         } else {
 296                                 $nowiki_content[$marker] = '<nowiki>'.$content.'</nowiki>';
 297                         }
 298                 }
 299
 300                 # math
 301                 $text = Parser::extractTags('math', $text, $math_content, $uniq_prefix);
 302                 foreach( $math_content as $marker => $content ){
 303                         if( $render ) {
 304                                 if( $this->mOptions->getUseTeX() ) {
 305                                         $math_content[$marker] = renderMath( $content );
 306                                 } else {
 307                                         $math_content[$marker] = '&lt;math&gt;'.$content.'&lt;math&gt;';
 308                                 }
 309                         } else {
 310                                 $math_content[$marker] = '<math>'.$content.'</math>';
 311                         }
 312                 }
 313
 314                 # pre
 315                 $text = Parser::extractTags('pre', $text, $pre_content, $uniq_prefix);
 316                 foreach( $pre_content as $marker => $content ){
 317                         if( $render ){
 318                                 $pre_content[$marker] = '<pre>' . wfEscapeHTMLTagsOnly( $content ) . '</pre>';
 319                         } else {
 320                                 $pre_content[$marker] = '<pre>'.$content.'</pre>';
 321                         }
 322                 }
 323
 324                 # Comments
 325                 if($stripcomments) {
 326                         $text = Parser::extractTags(STRIP_COMMENTS, $text, $comment_content, $uniq_prefix);
 327                         foreach( $comment_content as $marker => $content ){
 328                                 $comment_content[$marker] = '<!--'.$content.'-->';
 329                         }
 330                 }
 331
 332                 # Extensions
 333                 foreach ( $this->mTagHooks as $tag => $callback ) {
 334                         $ext_contents[$tag] = array();
 335                         $text = Parser::extractTags( $tag, $text, $ext_content[$tag], $uniq_prefix );
 336                         foreach( $ext_content[$tag] as $marker => $content ) {
 337                                 if ( $render ) {
 338                                         $ext_content[$tag][$marker] = $callback( $content );
 339                                 } else {
 340                                         $ext_content[$tag][$marker] = "<$tag>$content</$tag>";
 341                                 }
 342                         }
 343                 }
 344
 345                 # Merge state with the pre-existing state, if there is one
 346                 if ( $state ) {
 347                         $state['html'] = $state['html'] + $html_content;
 348                         $state['nowiki'] = $state['nowiki'] + $nowiki_content;
 349                         $state['math'] = $state['math'] + $math_content;
 350                         $state['pre'] = $state['pre'] + $pre_content;
 351                         $state['comment'] = $state['comment'] + $comment_content;
 352
 353                         foreach( $ext_content as $tag => $array ) {
 354                                 if ( array_key_exists( $tag, $state ) ) {
 355                                         $state[$tag] = $state[$tag] + $array;
 356                                 }
 357                         }
 358                 } else {
 359                         $state = array(
 360                           'html' => $html_content,
 361                           'nowiki' => $nowiki_content,
 362                           'math' => $math_content,
 363                           'pre' => $pre_content,
 364                           'comment' => $comment_content,
 365                         ) + $ext_content;
 366                 }
 367                 return $text;
 368         }
 369
 370         /**
 371          * restores pre, math, and heiro removed by strip()
 372          *
 373          * always call unstripNoWiki() after this one
 374          * @access private
 375          */
 376         function unstrip( $text, &$state ) {
 377                 # Must expand in reverse order, otherwise nested tags will be corrupted
 378                 $contentDict = end( $state );
 379                 for ( $contentDict = end( $state ); $contentDict !== false; $contentDict = prev( $state ) ) {
 380                         if( key($state) != 'nowiki' && key($state) != 'html') {
 381                                 for ( $content = end( $contentDict ); $content !== false; $content = prev( $contentDict ) ) {
 382                                         $text = str_replace( key( $contentDict ), $content, $text );
 383                                 }
 384                         }
 385                 }
 386
 387                 return $text;
 388         }
 389
 390         /**
 391          * always call this after unstrip() to preserve the order
 392          *
 393          * @access private
 394          */
 395         function unstripNoWiki( $text, &$state ) {
 396                 # Must expand in reverse order, otherwise nested tags will be corrupted
 397                 for ( $content = end($state['nowiki']); $content !== false; $content = prev( $state['nowiki'] ) ) {
 398                         $text = str_replace( key( $state['nowiki'] ), $content, $text );
 399                 }
 400
 401                 global $wgRawHtml;
 402                 if ($wgRawHtml) {
 403                         for ( $content = end($state['html']); $content !== false; $content = prev( $state['html'] ) ) {
 404                                 $text = str_replace( key( $state['html'] ), $content, $text );
 405                         }
 406                 }
 407
 408                 return $text;
 409         }
 410
 411         /**
 412          * Add an item to the strip state
 413          * Returns the unique tag which must be inserted into the stripped text
 414          * The tag will be replaced with the original text in unstrip()
 415          *
 416          * @access private
 417          */
 418         function insertStripItem( $text, &$state ) {
 419                 $rnd = UNIQ_PREFIX . '-item' . Parser::getRandomString();
 420                 if ( !$state ) {
 421                         $state = array(
 422                           'html' => array(),
 423                           'nowiki' => array(),
 424                           'math' => array(),
 425                           'pre' => array()
 426                         );
 427                 }
 428                 $state['item'][$rnd] = $text;
 429                 return $rnd;
 430         }
 431
 432         /**
 433          * Return allowed HTML attributes
 434          *
 435          * @access private
 436          */
 437         function getHTMLattrs () {
 438                 $htmlattrs = array( # Allowed attributes--no scripting, etc.
 439                                 'title', 'align', 'lang', 'dir', 'width', 'height',
 440                                 'bgcolor', 'clear', /* BR */ 'noshade', /* HR */
 441                                 'cite', /* BLOCKQUOTE, Q */ 'size', 'face', 'color',
 442                                 /* FONT */ 'type', 'start', 'value', 'compact',
 443                                 /* For various lists, mostly deprecated but safe */
 444                                 'summary', 'width', 'border', 'frame', 'rules',
 445                                 'cellspacing', 'cellpadding', 'valign', 'char',
 446                                 'charoff', 'colgroup', 'col', 'span', 'abbr', 'axis',
 447                                 'headers', 'scope', 'rowspan', 'colspan', /* Tables */
 448                                 'id', 'class', 'name', 'style' /* For CSS */
 449                                 );
 450                 return $htmlattrs ;
 451         }
 452
 453         /**
 454          * Remove non approved attributes and javascript in css
 455          *
 456          * @access private
 457          */
 458         function fixTagAttributes ( $t ) {
 459                 if ( trim ( $t ) == '' ) return '' ; # Saves runtime ;-)
 460                 $htmlattrs = $this->getHTMLattrs() ;
 461
 462                 # Strip non-approved attributes from the tag
 463                 $t = preg_replace(
 464                         '/(\\w+)(\\s*=\\s*([^\\s\">]+|\"[^\">]*\"))?/e',
 465                         "(in_array(strtolower(\"\$1\"),\$htmlattrs)?(\"\$1\".((\"x\$3\" != \"x\")?\"=\$3\":'')):'')",
 466                         $t);
 467
 468                 $t = str_replace ( '<></>' , '' , $t ) ; # This should fix bug 980557
 469
 470                 # Strip javascript "expression" from stylesheets. Brute force approach:
 471                 # If anythin offensive is found, all attributes of the HTML tag are dropped
 472
 473                 if( preg_match(
 474                         '/style\\s*=.*(expression|tps*:\/\/|url\\s*\().*/is',
 475                         wfMungeToUtf8( $t ) ) )
 476                 {
 477                         $t='';
 478                 }
 479
 480                 return trim ( $t ) ;
 481         }
 482
 483         /**
 484          * interface with html tidy, used if $wgUseTidy = true
 485          *
 486          * @access private
 487          */
 488         function tidy ( $text ) {
 489                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 490                 global $wgInputEncoding, $wgOutputEncoding;
 491                 $fname = 'Parser::tidy';
 492                 wfProfileIn( $fname );
 493
 494                 $cleansource = '';
 495                 switch(strtoupper($wgOutputEncoding)) {
 496                         case 'ISO-8859-1':
 497                                 $wgTidyOpts .= ($wgInputEncoding == $wgOutputEncoding)? ' -latin1':' -raw';
 498                                 break;
 499                         case 'UTF-8':
 500                                 $wgTidyOpts .= ($wgInputEncoding == $wgOutputEncoding)? ' -utf8':' -raw';
 501                                 break;
 502                         default:
 503                                 $wgTidyOpts .= ' -raw';
 504                         }
 505
 506                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 507 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 508 '<head><title>test</title></head><body>'.$text.'</body></html>';
 509                 $descriptorspec = array(
 510                         0 => array('pipe', 'r'),
 511                         1 => array('pipe', 'w'),
 512                         2 => array('file', '/dev/null', 'a')
 513                 );
 514                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts", $descriptorspec, $pipes);
 515                 if (is_resource($process)) {
 516                         fwrite($pipes[0], $wrappedtext);
 517                         fclose($pipes[0]);
 518                         while (!feof($pipes[1])) {
 519                                 $cleansource .= fgets($pipes[1], 1024);
 520                         }
 521                         fclose($pipes[1]);
 522                         $return_value = proc_close($process);
 523                 }
 524
 525                 wfProfileOut( $fname );
 526
 527                 if( $cleansource == '' && $text != '') {
 528                         wfDebug( "Tidy error detected!\n" );
 529                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 530                 } else {
 531                         return $cleansource;
 532                 }
 533         }
 534
 535         /**
 536          * parse the wiki syntax used to render tables
 537          *
 538          * @access private
 539          */
 540         function doTableStuff ( $t ) {
 541                 $fname = 'Parser::doTableStuff';
 542                 wfProfileIn( $fname );
 543
 544                 $t = explode ( "\n" , $t ) ;
 545                 $td = array () ; # Is currently a td tag open?
 546                 $ltd = array () ; # Was it TD or TH?
 547                 $tr = array () ; # Is currently a tr tag open?
 548                 $ltr = array () ; # tr attributes
 549                 $indent_level = 0; # indent level of the table
 550                 foreach ( $t AS $k => $x )
 551                 {
 552                         $x = trim ( $x ) ;
 553                         $fc = substr ( $x , 0 , 1 ) ;
 554                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 555                                 $indent_level = strlen( $matches[1] );
 556                                 $t[$k] = "\n" .
 557                                         str_repeat( '<dl><dd>', $indent_level ) .
 558                                         '<table ' . $this->fixTagAttributes ( $matches[2] ) . '>' ;
 559                                 array_push ( $td , false ) ;
 560                                 array_push ( $ltd , '' ) ;
 561                                 array_push ( $tr , false ) ;
 562                                 array_push ( $ltr , '' ) ;
 563                         }
 564                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 565                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 566                                 $z = "</table>\n" ;
 567                                 $l = array_pop ( $ltd ) ;
 568                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 569                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 570                                 array_pop ( $ltr ) ;
 571                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 572                         }
 573                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 574                                 $x = substr ( $x , 1 ) ;
 575                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 576                                 $z = '' ;
 577                                 $l = array_pop ( $ltd ) ;
 578                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 579                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 580                                 array_pop ( $ltr ) ;
 581                                 $t[$k] = $z ;
 582                                 array_push ( $tr , false ) ;
 583                                 array_push ( $td , false ) ;
 584                                 array_push ( $ltd , '' ) ;
 585                                 array_push ( $ltr , $this->fixTagAttributes ( $x ) ) ;
 586                         }
 587                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 588                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 589                                         $fc = '+' ;
 590                                         $x = substr ( $x , 1 ) ;
 591                                 }
 592                                 $after = substr ( $x , 1 ) ;
 593                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 594                                 $after = explode ( '||' , $after ) ;
 595                                 $t[$k] = '' ;
 596                                 foreach ( $after AS $theline )
 597                                 {
 598                                         $z = '' ;
 599                                         if ( $fc != '+' )
 600                                         {
 601                                                 $tra = array_pop ( $ltr ) ;
 602                                                 if ( !array_pop ( $tr ) ) $z = '<tr '.$tra.">\n" ;
 603                                                 array_push ( $tr , true ) ;
 604                                                 array_push ( $ltr , '' ) ;
 605                                         }
 606
 607                                         $l = array_pop ( $ltd ) ;
 608                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 609                                         if ( $fc == '|' ) $l = 'td' ;
 610                                         else if ( $fc == '!' ) $l = 'th' ;
 611                                         else if ( $fc == '+' ) $l = 'caption' ;
 612                                         else $l = '' ;
 613                                         array_push ( $ltd , $l ) ;
 614                                         $y = explode ( '|' , $theline , 2 ) ;
 615                                         if ( count ( $y ) == 1 ) $y = "{$z}<{$l}>{$y[0]}" ;
 616                                         else $y = $y = "{$z}<{$l} ".$this->fixTagAttributes($y[0]).">{$y[1]}" ;
 617                                         $t[$k] .= $y ;
 618                                         array_push ( $td , true ) ;
 619                                 }
 620                         }
 621                 }
 622
 623                 # Closing open td, tr && table
 624                 while ( count ( $td ) > 0 )
 625                 {
 626                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 627                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 628                         $t[] = '</table>' ;
 629                 }
 630
 631                 $t = implode ( "\n" , $t ) ;
 632                 #               $t = $this->removeHTMLtags( $t );
 633                 wfProfileOut( $fname );
 634                 return $t ;
 635         }
 636
 637         /**
 638          * Helper function for parse() that transforms wiki markup into
 639          * HTML. Only called for $mOutputType == OT_HTML.
 640          *
 641          * @access private
 642          */
 643         function internalParse( $text, $linestart, $args = array(), $isMain=true ) {
 644         global $wgContLang;
 645
 646                 $fname = 'Parser::internalParse';
 647                 wfProfileIn( $fname );
 648
 649                 $text = $this->removeHTMLtags( $text );
 650                 $text = $this->replaceVariables( $text, $args );
 651
 652                 $text = $wgContLang->convert($text);
 653
 654                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 655
 656                 $text = $this->doHeadings( $text );
 657                 if($this->mOptions->getUseDynamicDates()) {
 658                         global $wgDateFormatter;
 659                         $text = $wgDateFormatter->reformat( $this->mOptions->getDateFormat(), $text );
 660                 }
 661                 $text = $this->doAllQuotes( $text );
 662                 $text = $this->doMagicLinks( $text );
 663                 $text = $this->replaceInternalLinks ( $text );
 664                 # Another call to replace links and images inside captions of images
 665                 $text = $this->replaceInternalLinks ( $text );
 666                 $text = $this->replaceExternalLinks( $text );
 667                 $text = $this->doTableStuff( $text );
 668                 $text = $this->formatHeadings( $text, $isMain );
 669                 $sk =& $this->mOptions->getSkin();
 670                 $text = $sk->transformContent( $text );
 671
 672                 wfProfileOut( $fname );
 673                 return $text;
 674         }
 675
 676         /**
 677          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 678          * magic external links.
 679          *
 680          * @access private
 681          */
 682         function &doMagicLinks( &$text ) {
 683                 global $wgUseGeoMode;
 684                 $text = $this->magicISBN( $text );
 685                 if ( isset( $wgUseGeoMode ) && $wgUseGeoMode ) {
 686                         $text = $this->magicGEO( $text );
 687                 }
 688                 $text = $this->magicRFC( $text );
 689                 return $text;
 690         }
 691
 692         /**
 693          * Parse ^^ tokens and return html
 694          *
 695          * @access private
 696          */
 697         function doExponent ( $text ) {
 698                 $fname = 'Parser::doExponent';
 699                 wfProfileIn( $fname);
 700                 $text = preg_replace('/\^\^(.*)\^\^/','<small><sup>\\1</sup></small>', $text);
 701                 wfProfileOut( $fname);
 702                 return $text;
 703         }
 704
 705         /**
 706          * Parse headers and return html
 707          *
 708          * @access private
 709          */
 710         function doHeadings( $text ) {
 711                 $fname = 'Parser::doHeadings';
 712                 wfProfileIn( $fname );
 713                 for ( $i = 6; $i >= 1; --$i ) {
 714                         $h = substr( '======', 0, $i );
 715                         $text = preg_replace( "/^{$h}(.+){$h}(\\s|$)/m",
 716                           "<h{$i}>\\1</h{$i}>\\2", $text );
 717                 }
 718                 wfProfileOut( $fname );
 719                 return $text;
 720         }
 721
 722         /**
 723          * Replace single quotes with HTML markup
 724          * @access private
 725          * @return string the altered text
 726          */
 727         function doAllQuotes( $text ) {
 728                 $fname = 'Parser::doAllQuotes';
 729                 wfProfileIn( $fname );
 730                 $outtext = '';
 731                 $lines = explode( "\n", $text );
 732                 foreach ( $lines as $line ) {
 733                         $outtext .= $this->doQuotes ( $line ) . "\n";
 734                 }
 735                 $outtext = substr($outtext, 0,-1);
 736                 wfProfileOut( $fname );
 737                 return $outtext;
 738         }
 739
 740         /**
 741          * Helper function for doAllQuotes()
 742          * @access private
 743          */
 744         function doQuotes( $text ) {
 745                 $arr = preg_split ("/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE);
 746                 if (count ($arr) == 1)
 747                         return $text;
 748                 else
 749                 {
 750                         # First, do some preliminary work. This may shift some apostrophes from
 751                         # being mark-up to being text. It also counts the number of occurrences
 752                         # of bold and italics mark-ups.
 753                         $i = 0;
 754                         $numbold = 0;
 755                         $numitalics = 0;
 756                         foreach ($arr as $r)
 757                         {
 758                                 if (($i % 2) == 1)
 759                                 {
 760                                         # If there are ever four apostrophes, assume the first is supposed to
 761                                         # be text, and the remaining three constitute mark-up for bold text.
 762                                         if (strlen ($arr[$i]) == 4)
 763                                         {
 764                                                 $arr[$i-1] .= "'";
 765                                                 $arr[$i] = "'''";
 766                                         }
 767                                         # If there are more than 5 apostrophes in a row, assume they're all
 768                                         # text except for the last 5.
 769                                         else if (strlen ($arr[$i]) > 5)
 770                                         {
 771                                                 $arr[$i-1] .= str_repeat ("'", strlen ($arr[$i]) - 5);
 772                                                 $arr[$i] = "'''''";
 773                                         }
 774                                         # Count the number of occurrences of bold and italics mark-ups.
 775                                         # We are not counting sequences of five apostrophes.
 776                                         if (strlen ($arr[$i]) == 2) $numitalics++;  else
 777                                         if (strlen ($arr[$i]) == 3) $numbold++;     else
 778                                         if (strlen ($arr[$i]) == 5) { $numitalics++; $numbold++; }
 779                                 }
 780                                 $i++;
 781                         }
 782
 783                         # If there is an odd number of both bold and italics, it is likely
 784                         # that one of the bold ones was meant to be an apostrophe followed
 785                         # by italics. Which one we cannot know for certain, but it is more
 786                         # likely to be one that has a single-letter word before it.
 787                         if (($numbold % 2 == 1) && ($numitalics % 2 == 1))
 788                         {
 789                                 $i = 0;
 790                                 $firstsingleletterword = -1;
 791                                 $firstmultiletterword = -1;
 792                                 $firstspace = -1;
 793                                 foreach ($arr as $r)
 794                                 {
 795                                         if (($i % 2 == 1) and (strlen ($r) == 3))
 796                                         {
 797                                                 $x1 = substr ($arr[$i-1], -1);
 798                                                 $x2 = substr ($arr[$i-1], -2, 1);
 799                                                 if ($x1 == ' ') {
 800                                                         if ($firstspace == -1) $firstspace = $i;
 801                                                 } else if ($x2 == ' ') {
 802                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
 803                                                 } else {
 804                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
 805                                                 }
 806                                         }
 807                                         $i++;
 808                                 }
 809
 810                                 # If there is a single-letter word, use it!
 811                                 if ($firstsingleletterword > -1)
 812                                 {
 813                                         $arr [ $firstsingleletterword ] = "''";
 814                                         $arr [ $firstsingleletterword-1 ] .= "'";
 815                                 }
 816                                 # If not, but there's a multi-letter word, use that one.
 817                                 else if ($firstmultiletterword > -1)
 818                                 {
 819                                         $arr [ $firstmultiletterword ] = "''";
 820                                         $arr [ $firstmultiletterword-1 ] .= "'";
 821                                 }
 822                                 # ... otherwise use the first one that has neither.
 823                                 # (notice that it is possible for all three to be -1 if, for example,
 824                                 # there is only one pentuple-apostrophe in the line)
 825                                 else if ($firstspace > -1)
 826                                 {
 827                                         $arr [ $firstspace ] = "''";
 828                                         $arr [ $firstspace-1 ] .= "'";
 829                                 }
 830                         }
 831
 832                         # Now let's actually convert our apostrophic mush to HTML!
 833                         $output = '';
 834                         $buffer = '';
 835                         $state = '';
 836                         $i = 0;
 837                         foreach ($arr as $r)
 838                         {
 839                                 if (($i % 2) == 0)
 840                                 {
 841                                         if ($state == 'both')
 842                                                 $buffer .= $r;
 843                                         else
 844                                                 $output .= $r;
 845                                 }
 846                                 else
 847                                 {
 848                                         if (strlen ($r) == 2)
 849                                         {
 850                                                 if ($state == 'i')
 851                                                 { $output .= '</i>'; $state = ''; }
 852                                                 else if ($state == 'bi')
 853                                                 { $output .= '</i>'; $state = 'b'; }
 854                                                 else if ($state == 'ib')
 855                                                 { $output .= '</b></i><b>'; $state = 'b'; }
 856                                                 else if ($state == 'both')
 857                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
 858                                                 else # $state can be 'b' or ''
 859                                                 { $output .= '<i>'; $state .= 'i'; }
 860                                         }
 861                                         else if (strlen ($r) == 3)
 862                                         {
 863                                                 if ($state == 'b')
 864                                                 { $output .= '</b>'; $state = ''; }
 865                                                 else if ($state == 'bi')
 866                                                 { $output .= '</i></b><i>'; $state = 'i'; }
 867                                                 else if ($state == 'ib')
 868                                                 { $output .= '</b>'; $state = 'i'; }
 869                                                 else if ($state == 'both')
 870                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
 871                                                 else # $state can be 'i' or ''
 872                                                 { $output .= '<b>'; $state .= 'b'; }
 873                                         }
 874                                         else if (strlen ($r) == 5)
 875                                         {
 876                                                 if ($state == 'b')
 877                                                 { $output .= '</b><i>'; $state = 'i'; }
 878                                                 else if ($state == 'i')
 879                                                 { $output .= '</i><b>'; $state = 'b'; }
 880                                                 else if ($state == 'bi')
 881                                                 { $output .= '</i></b>'; $state = ''; }
 882                                                 else if ($state == 'ib')
 883                                                 { $output .= '</b></i>'; $state = ''; }
 884                                                 else if ($state == 'both')
 885                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
 886                                                 else # ($state == '')
 887                                                 { $buffer = ''; $state = 'both'; }
 888                                         }
 889                                 }
 890                                 $i++;
 891                         }
 892                         # Now close all remaining tags.  Notice that the order is important.
 893                         if ($state == 'b' || $state == 'ib')
 894                                 $output .= '</b>';
 895                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
 896                                 $output .= '</i>';
 897                         if ($state == 'bi')
 898                                 $output .= '</b>';
 899                         if ($state == 'both')
 900                                 $output .= '<b><i>'.$buffer.'</i></b>';
 901                         return $output;
 902                 }
 903         }
 904
 905         /**
 906          * Replace external links
 907          *
 908          * Note: we have to do external links before the internal ones,
 909          * and otherwise take great care in the order of things here, so
 910          * that we don't end up interpreting some URLs twice.
 911          *
 912          * @access private
 913          */
 914         function replaceExternalLinks( $text ) {
 915                 $fname = 'Parser::replaceExternalLinks';
 916                 wfProfileIn( $fname );
 917
 918                 $sk =& $this->mOptions->getSkin();
 919                 $linktrail = wfMsgForContent('linktrail');
 920                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 921
 922                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
 923
 924                 $i = 0;
 925                 while ( $i<count( $bits ) ) {
 926                         $url = $bits[$i++];
 927                         $protocol = $bits[$i++];
 928                         $text = $bits[$i++];
 929                         $trail = $bits[$i++];
 930
 931                         # If the link text is an image URL, replace it with an <img> tag
 932                         # This happened by accident in the original parser, but some people used it extensively
 933                         $img = $this->maybeMakeImageLink( $text );
 934                         if ( $img !== false ) {
 935                                 $text = $img;
 936                         }
 937
 938                         $dtrail = '';
 939
 940                         # No link text, e.g. [http://domain.tld/some.link]
 941                         if ( $text == '' ) {
 942                                 # Autonumber if allowed
 943                                 if ( strpos( HTTP_PROTOCOLS, $protocol ) !== false ) {
 944                                         $text = '[' . ++$this->mAutonumber . ']';
 945                                 } else {
 946                                         # Otherwise just use the URL
 947                                         $text = htmlspecialchars( $url );
 948                                 }
 949                         } else {
 950                                 # Have link text, e.g. [http://domain.tld/some.link text]s
 951                                 # Check for trail
 952                                 if ( preg_match( $linktrail, $trail, $m2 ) ) {
 953                                         $dtrail = $m2[1];
 954                                         $trail = $m2[2];
 955                                 }
 956                         }
 957
 958                         $encUrl = htmlspecialchars( $url );
 959                         # Bit in parentheses showing the URL for the printable version
 960                         if( $url == $text || preg_match( "!$protocol://" . preg_quote( $text, '/' ) . "/?$!", $url ) ) {
 961                                 $paren = '';
 962                         } else {
 963                                 # Expand the URL for printable version
 964                                 if ( ! $sk->suppressUrlExpansion() ) {
 965                                         $paren = "<span class='urlexpansion'> (<i>" . htmlspecialchars ( $encUrl ) . "</i>)</span>";
 966                                 } else {
 967                                         $paren = '';
 968                                 }
 969                         }
 970
 971                         # Process the trail (i.e. everything after this link up until start of the next link),
 972                         # replacing any non-bracketed links
 973                         $trail = $this->replaceFreeExternalLinks( $trail );
 974
 975                         $la = $sk->getExternalLinkAttributes( $url, $text );
 976
 977                         # Use the encoded URL
 978                         # This means that users can paste URLs directly into the text
 979                         # Funny characters like &ouml; aren't valid in URLs anyway
 980                         # This was changed in August 2004
 981                         $s .= "<a href=\"{$url}\"{$la}>{$text}</a>{$dtrail}{$paren}{$trail}";
 982                 }
 983
 984                 wfProfileOut( $fname );
 985                 return $s;
 986         }
 987
 988         /**
 989          * Replace anything that looks like a URL with a link
 990          * @access private
 991          */
 992         function replaceFreeExternalLinks( $text ) {
 993                 $bits = preg_split( '/((?:'.URL_PROTOCOLS.'):)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
 994                 $s = array_shift( $bits );
 995                 $i = 0;
 996
 997                 $sk =& $this->mOptions->getSkin();
 998
 999                 while ( $i < count( $bits ) ){
1000                         $protocol = $bits[$i++];
1001                         $remainder = $bits[$i++];
1002
1003                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1004                                 # Found some characters after the protocol that look promising
1005                                 $url = $protocol . $m[1];
1006                                 $trail = $m[2];
1007
1008                                 # Move trailing punctuation to $trail
1009                                 $sep = ',;\.:!?';
1010                                 # If there is no left bracket, then consider right brackets fair game too
1011                                 if ( strpos( $url, '(' ) === false ) {
1012                                         $sep .= ')';
1013                                 }
1014
1015                                 $numSepChars = strspn( strrev( $url ), $sep );
1016                                 if ( $numSepChars ) {
1017                                         $trail = substr( $url, -$numSepChars ) . $trail;
1018                                         $url = substr( $url, 0, -$numSepChars );
1019                                 }
1020
1021                                 # Replace &amp; from obsolete syntax with &
1022                                 $url = str_replace( '&amp;', '&', $url );
1023
1024                                 # Is this an external image?
1025                                 $text = $this->maybeMakeImageLink( $url );
1026                                 if ( $text === false ) {
1027                                         # Not an image, make a link
1028                                         $text = $sk->makeExternalLink( $url, $url );
1029                                 }
1030                                 $s .= $text . $trail;
1031                         } else {
1032                                 $s .= $protocol . $remainder;
1033                         }
1034                 }
1035                 return $s;
1036         }
1037
1038         /**
1039          * make an image if it's allowed
1040          * @access private
1041          */
1042         function maybeMakeImageLink( $url ) {
1043                 $sk =& $this->mOptions->getSkin();
1044                 $text = false;
1045                 if ( $this->mOptions->getAllowExternalImages() ) {
1046                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1047                                 # Image found
1048                                 $text = $sk->makeImage( htmlspecialchars( $url ) );
1049                         }
1050                 }
1051                 return $text;
1052         }
1053
1054         /**
1055          * Process [[ ]] wikilinks
1056          *
1057          * @access private
1058          */
1059         function replaceInternalLinks( $s ) {
1060                 global $wgLang, $wgContLang, $wgLinkCache;
1061                 global $wgNamespacesWithSubpages;
1062                 static $fname = 'Parser::replaceInternalLinks' ;
1063                 wfProfileIn( $fname );
1064
1065                 wfProfileIn( $fname.'-setup' );
1066                 static $tc = FALSE;
1067                 # the % is needed to support urlencoded titles as well
1068                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1069                 $sk =& $this->mOptions->getSkin();
1070
1071                 $redirect = MagicWord::get ( MAG_REDIRECT ) ;
1072
1073                 $a = explode( '[[', ' ' . $s );
1074                 $s = array_shift( $a );
1075                 $s = substr( $s, 1 );
1076
1077                 # Match a link having the form [[namespace:link|alternate]]trail
1078                 static $e1 = FALSE;
1079                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|([^]]+))?]](.*)\$/sD"; }
1080                 # Match the end of a line for a word that's not followed by whitespace,
1081                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1082                 static $e2 = '/^(.*?)([a-zA-Z\x80-\xff]+)$/sD';
1083
1084                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1085                 # Special and Media are pseudo-namespaces; no pages actually exist in them
1086
1087                 $nottalk = !Namespace::isTalk( $this->mTitle->getNamespace() );
1088
1089                 if ( $useLinkPrefixExtension ) {
1090                         if ( preg_match( $e2, $s, $m ) ) {
1091                                 $first_prefix = $m[2];
1092                                 $s = $m[1];
1093                         } else {
1094                                 $first_prefix = false;
1095                         }
1096                 } else {
1097                         $prefix = '';
1098                 }
1099
1100                 wfProfileOut( $fname.'-setup' );
1101
1102                 # start procedeeding each line
1103                 foreach ( $a as $line ) {
1104                         wfProfileIn( $fname.'-prefixhandling' );
1105                         if ( $useLinkPrefixExtension ) {
1106                                 if ( preg_match( $e2, $s, $m ) ) {
1107                                         $prefix = $m[2];
1108                                         $s = $m[1];
1109                                 } else {
1110                                         $prefix='';
1111                                 }
1112                                 # first link
1113                                 if($first_prefix) {
1114                                         $prefix = $first_prefix;
1115                                         $first_prefix = false;
1116                                 }
1117                         }
1118                         wfProfileOut( $fname.'-prefixhandling' );
1119
1120                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1121                                 $text = $m[2];
1122                                 # fix up urlencoded title texts
1123                                 if(preg_match('/%/', $m[1] )) $m[1] = urldecode($m[1]);
1124                                 $trail = $m[3];
1125                         } else { # Invalid form; output directly
1126                                 $s .= $prefix . '[[' . $line ;
1127                                 continue;
1128                         }
1129
1130                         # Don't allow internal links to pages containing
1131                         # PROTO: where PROTO is a valid URL protocol; these
1132                         # should be external links.
1133                         if (preg_match('/((?:'.URL_PROTOCOLS.'):)/', $m[1])) {
1134                                 $s .= $prefix . '[[' . $line ;
1135                                 continue;
1136                         }
1137
1138                         # Valid link forms:
1139                         # Foobar -- normal
1140                         # :Foobar -- override special treatment of prefix (images, language links)
1141                         # /Foobar -- convert to CurrentPage/Foobar
1142                         # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1143
1144                         # Look at the first character
1145                         $c = substr($m[1],0,1);
1146                         $noforce = ($c != ':');
1147
1148                         # subpage
1149                         if( $c == '/' ) {
1150                                 # / at end means we don't want the slash to be shown
1151                                 if(substr($m[1],-1,1)=='/') {
1152                                         $m[1]=substr($m[1],1,strlen($m[1])-2);
1153                                         $noslash=$m[1];
1154                                 } else {
1155                                         $noslash=substr($m[1],1);
1156                                 }
1157
1158                                 # Some namespaces don't allow subpages
1159                                 if(!empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()])) {
1160                                         # subpages allowed here
1161                                         $link = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1162                                         if( '' == $text ) {
1163                                                 $text= $m[1];
1164                                         } # this might be changed for ugliness reasons
1165                                 } else {
1166                                         # no subpage allowed, use standard link
1167                                         $link = $noslash;
1168                                 }
1169
1170                         } elseif( $noforce ) { # no subpage
1171                                 $link = $m[1];
1172                         } else {
1173                                 # We don't want to keep the first character
1174                                 $link = substr( $m[1], 1 );
1175                         }
1176
1177                         $wasblank = ( '' == $text );
1178                         if( $wasblank ) $text = $link;
1179
1180                         $nt = Title::newFromText( $link );
1181                         if( !$nt ) {
1182                                 $s .= $prefix . '[[' . $line;
1183                                 continue;
1184                         }
1185
1186                         $ns = $nt->getNamespace();
1187                         $iw = $nt->getInterWiki();
1188
1189                         # Link not escaped by : , create the various objects
1190                         if( $noforce ) {
1191
1192                                 # Interwikis
1193                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1194                                         array_push( $this->mOutput->mLanguageLinks, $nt->getFullText() );
1195                                         $tmp = $prefix . $trail ;
1196                                         $s .= (trim($tmp) == '')? '': $tmp;
1197                                         continue;
1198                                 }
1199
1200                                 if ( $ns == NS_IMAGE ) {
1201                                         $s .= $prefix . $sk->makeImageLinkObj( $nt, $text ) . $trail;
1202                                         $wgLinkCache->addImageLinkObj( $nt );
1203                                         continue;
1204                                 }
1205
1206                                 if ( $ns == NS_CATEGORY ) {
1207                                         $t = $nt->getText() ;
1208                                         $nnt = Title::newFromText ( Namespace::getCanonicalName(NS_CATEGORY).':'.$t ) ;
1209
1210                                         $wgLinkCache->suspend(); # Don't save in links/brokenlinks
1211                                         $pPLC=$sk->postParseLinkColour();
1212                                         $sk->postParseLinkColour( false );
1213                                         $t = $sk->makeLinkObj( $nnt, $t, '', '' , $prefix );
1214                                         $sk->postParseLinkColour( $pPLC );
1215                                         $wgLinkCache->resume();
1216
1217                                         if ( $wasblank ) {
1218                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1219                                                         $sortkey = $this->mTitle->getText();
1220                                                 } else {
1221                                                         $sortkey = $this->mTitle->getPrefixedText();
1222                                                 }
1223                                         } else {
1224                                                 $sortkey = $text;
1225                                         }
1226                                         $wgLinkCache->addCategoryLinkObj( $nt, $sortkey );
1227                                         $this->mOutput->mCategoryLinks[] = $t ;
1228                                         $s .= $prefix . $trail ;
1229                                         continue;
1230                                 }
1231                         }
1232
1233                         if( ( $nt->getPrefixedText() === $this->mTitle->getPrefixedText() ) &&
1234                             ( strpos( $link, '#' ) === FALSE ) ) {
1235                                 # Self-links are handled specially; generally de-link and change to bold.
1236                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1237                                 continue;
1238                         }
1239
1240                         if( $ns == NS_MEDIA ) {
1241                                 $s .= $prefix . $sk->makeMediaLinkObj( $nt, $text ) . $trail;
1242                                 $wgLinkCache->addImageLinkObj( $nt );
1243                                 continue;
1244                         } elseif( $ns == NS_SPECIAL ) {
1245                                 $s .= $prefix . $sk->makeKnownLinkObj( $nt, $text, '', $trail );
1246                                 continue;
1247                         }
1248                         $s .= $sk->makeLinkObj( $nt, $text, '', $trail, $prefix );
1249                 }
1250                 wfProfileOut( $fname );
1251                 return $s;
1252         }
1253
1254         /**#@+
1255          * Used by doBlockLevels()
1256          * @access private
1257          */
1258         /* private */ function closeParagraph() {
1259                 $result = '';
1260                 if ( '' != $this->mLastSection ) {
1261                         $result = '</' . $this->mLastSection  . ">\n";
1262                 }
1263                 $this->mInPre = false;
1264                 $this->mLastSection = '';
1265                 return $result;
1266         }
1267         # getCommon() returns the length of the longest common substring
1268         # of both arguments, starting at the beginning of both.
1269         #
1270         /* private */ function getCommon( $st1, $st2 ) {
1271                 $fl = strlen( $st1 );
1272                 $shorter = strlen( $st2 );
1273                 if ( $fl < $shorter ) { $shorter = $fl; }
1274
1275                 for ( $i = 0; $i < $shorter; ++$i ) {
1276                         if ( $st1{$i} != $st2{$i} ) { break; }
1277                 }
1278                 return $i;
1279         }
1280         # These next three functions open, continue, and close the list
1281         # element appropriate to the prefix character passed into them.
1282         #
1283         /* private */ function openList( $char ) {
1284                 $result = $this->closeParagraph();
1285
1286                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1287                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1288                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1289                 else if ( ';' == $char ) {
1290                         $result .= '<dl><dt>';
1291                         $this->mDTopen = true;
1292                 }
1293                 else { $result = '<!-- ERR 1 -->'; }
1294
1295                 return $result;
1296         }
1297
1298         /* private */ function nextItem( $char ) {
1299                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1300                 else if ( ':' == $char || ';' == $char ) {
1301                         $close = '</dd>';
1302                         if ( $this->mDTopen ) { $close = '</dt>'; }
1303                         if ( ';' == $char ) {
1304                                 $this->mDTopen = true;
1305                                 return $close . '<dt>';
1306                         } else {
1307                                 $this->mDTopen = false;
1308                                 return $close . '<dd>';
1309                         }
1310                 }
1311                 return '<!-- ERR 2 -->';
1312         }
1313
1314         /* private */ function closeList( $char ) {
1315                 if ( '*' == $char ) { $text = '</li></ul>'; }
1316                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1317                 else if ( ':' == $char ) {
1318                         if ( $this->mDTopen ) {
1319                                 $this->mDTopen = false;
1320                                 $text = '</dt></dl>';
1321                         } else {
1322                                 $text = '</dd></dl>';
1323                         }
1324                 }
1325                 else {  return '<!-- ERR 3 -->'; }
1326                 return $text."\n";
1327         }
1328         /**#@-*/
1329
1330         /**
1331          * Make lists from lines starting with ':', '*', '#', etc.
1332          *
1333          * @access private
1334          * @return string the lists rendered as HTML
1335          */
1336         function doBlockLevels( $text, $linestart ) {
1337                 $fname = 'Parser::doBlockLevels';
1338                 wfProfileIn( $fname );
1339
1340                 # Parsing through the text line by line.  The main thing
1341                 # happening here is handling of block-level elements p, pre,
1342                 # and making lists from lines starting with * # : etc.
1343                 #
1344                 $textLines = explode( "\n", $text );
1345
1346                 $lastPrefix = $output = $lastLine = '';
1347                 $this->mDTopen = $inBlockElem = false;
1348                 $prefixLength = 0;
1349                 $paragraphStack = false;
1350
1351                 if ( !$linestart ) {
1352                         $output .= array_shift( $textLines );
1353                 }
1354                 foreach ( $textLines as $oLine ) {
1355                         $lastPrefixLength = strlen( $lastPrefix );
1356                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
1357                         $preOpenMatch = preg_match('/<pre/i', $oLine );
1358                         if ( !$this->mInPre ) {
1359                                 # Multiple prefixes may abut each other for nested lists.
1360                                 $prefixLength = strspn( $oLine, '*#:;' );
1361                                 $pref = substr( $oLine, 0, $prefixLength );
1362
1363                                 # eh?
1364                                 $pref2 = str_replace( ';', ':', $pref );
1365                                 $t = substr( $oLine, $prefixLength );
1366                                 $this->mInPre = !empty($preOpenMatch);
1367                         } else {
1368                                 # Don't interpret any other prefixes in preformatted text
1369                                 $prefixLength = 0;
1370                                 $pref = $pref2 = '';
1371                                 $t = $oLine;
1372                         }
1373
1374                         # List generation
1375                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
1376                                 # Same as the last item, so no need to deal with nesting or opening stuff
1377                                 $output .= $this->nextItem( substr( $pref, -1 ) );
1378                                 $paragraphStack = false;
1379
1380                                 if ( substr( $pref, -1 ) == ';') {
1381                                         # The one nasty exception: definition lists work like this:
1382                                         # ; title : definition text
1383                                         # So we check for : in the remainder text to split up the
1384                                         # title and definition, without b0rking links.
1385                                         # FIXME: This is not foolproof. Something better in Tokenizer might help.
1386                                         if( preg_match( '/^(.*?(?:\s|&nbsp;)):(.*)$/', $t, $match ) ) {
1387                                                 $term = $match[1];
1388                                                 $output .= $term . $this->nextItem( ':' );
1389                                                 $t = $match[2];
1390                                         }
1391                                 }
1392                         } elseif( $prefixLength || $lastPrefixLength ) {
1393                                 # Either open or close a level...
1394                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
1395                                 $paragraphStack = false;
1396
1397                                 while( $commonPrefixLength < $lastPrefixLength ) {
1398                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
1399                                         --$lastPrefixLength;
1400                                 }
1401                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
1402                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
1403                                 }
1404                                 while ( $prefixLength > $commonPrefixLength ) {
1405                                         $char = substr( $pref, $commonPrefixLength, 1 );
1406                                         $output .= $this->openList( $char );
1407
1408                                         if ( ';' == $char ) {
1409                                                 # FIXME: This is dupe of code above
1410                                                 if( preg_match( '/^(.*?(?:\s|&nbsp;)):(.*)$/', $t, $match ) ) {
1411                                                         $term = $match[1];
1412                                                         $output .= $term . $this->nextItem( ':' );
1413                                                         $t = $match[2];
1414                                                 }
1415                                         }
1416                                         ++$commonPrefixLength;
1417                                 }
1418                                 $lastPrefix = $pref2;
1419                         }
1420                         if( 0 == $prefixLength ) {
1421                                 # No prefix (not in list)--go to paragraph mode
1422                                 $uniq_prefix = UNIQ_PREFIX;
1423                                 // XXX: use a stack for nestable elements like span, table and div
1424                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<li|<\\/tr|<\\/td|<\\/th)/i', $t );
1425                                 $closematch = preg_match(
1426                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
1427                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$uniq_prefix.'-pre|<\\/li|<\\/ul)/i', $t );
1428                                 if ( $openmatch or $closematch ) {
1429                                         $paragraphStack = false;
1430                                         $output .= $this->closeParagraph();
1431                                         if($preOpenMatch and !$preCloseMatch) {
1432                                                 $this->mInPre = true;
1433                                         }
1434                                         if ( $closematch ) {
1435                                                 $inBlockElem = false;
1436                                         } else {
1437                                                 $inBlockElem = true;
1438                                         }
1439                                 } else if ( !$inBlockElem && !$this->mInPre ) {
1440                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
1441                                                 // pre
1442                                                 if ($this->mLastSection != 'pre') {
1443                                                         $paragraphStack = false;
1444                                                         $output .= $this->closeParagraph().'<pre>';
1445                                                         $this->mLastSection = 'pre';
1446                                                 }
1447                                                 $t = substr( $t, 1 );
1448                                         } else {
1449                                                 // paragraph
1450                                                 if ( '' == trim($t) ) {
1451                                                         if ( $paragraphStack ) {
1452                                                                 $output .= $paragraphStack.'<br />';
1453                                                                 $paragraphStack = false;
1454                                                                 $this->mLastSection = 'p';
1455                                                         } else {
1456                                                                 if ($this->mLastSection != 'p' ) {
1457                                                                         $output .= $this->closeParagraph();
1458                                                                         $this->mLastSection = '';
1459                                                                         $paragraphStack = '<p>';
1460                                                                 } else {
1461                                                                         $paragraphStack = '</p><p>';
1462                                                                 }
1463                                                         }
1464                                                 } else {
1465                                                         if ( $paragraphStack ) {
1466                                                                 $output .= $paragraphStack;
1467                                                                 $paragraphStack = false;
1468                                                                 $this->mLastSection = 'p';
1469                                                         } else if ($this->mLastSection != 'p') {
1470                                                                 $output .= $this->closeParagraph().'<p>';
1471                                                                 $this->mLastSection = 'p';
1472                                                         }
1473                                                 }
1474                                         }
1475                                 }
1476                         }
1477                         if ($paragraphStack === false) {
1478                                 $output .= $t."\n";
1479                         }
1480                 }
1481                 while ( $prefixLength ) {
1482                         $output .= $this->closeList( $pref2{$prefixLength-1} );
1483                         --$prefixLength;
1484                 }
1485                 if ( '' != $this->mLastSection ) {
1486                         $output .= '</' . $this->mLastSection . '>';
1487                         $this->mLastSection = '';
1488                 }
1489
1490                 wfProfileOut( $fname );
1491                 return $output;
1492         }
1493
1494         /**
1495          * Return value of a magic variable (like PAGENAME)
1496          *
1497          * @access private
1498          */
1499         function getVariableValue( $index ) {
1500                 global $wgContLang, $wgSitename, $wgServer;
1501
1502                 switch ( $index ) {
1503                         case MAG_CURRENTMONTH:
1504                                 return $wgContLang->formatNum( date( 'm' ) );
1505                         case MAG_CURRENTMONTHNAME:
1506                                 return $wgContLang->getMonthName( date('n') );
1507                         case MAG_CURRENTMONTHNAMEGEN:
1508                                 return $wgContLang->getMonthNameGen( date('n') );
1509                         case MAG_CURRENTDAY:
1510                                 return $wgContLang->formatNum( date('j') );
1511                         case MAG_PAGENAME:
1512                                 return $this->mTitle->getText();
1513                         case MAG_PAGENAMEE:
1514                                 return $this->mTitle->getPartialURL();
1515                         case MAG_NAMESPACE:
1516                                 # return Namespace::getCanonicalName($this->mTitle->getNamespace());
1517                                 return $wgContLang->getNsText($this->mTitle->getNamespace()); # Patch by Dori
1518                         case MAG_CURRENTDAYNAME:
1519                                 return $wgContLang->getWeekdayName( date('w')+1 );
1520                         case MAG_CURRENTYEAR:
1521                                 return $wgContLang->formatNum( date( 'Y' ) );
1522                         case MAG_CURRENTTIME:
1523                                 return $wgContLang->time( wfTimestampNow(), false );
1524                         case MAG_NUMBEROFARTICLES:
1525                                 return $wgContLang->formatNum( wfNumberOfArticles() );
1526                         case MAG_SITENAME:
1527                                 return $wgSitename;
1528                         case MAG_SERVER:
1529                                 return $wgServer;
1530                         default:
1531                                 return NULL;
1532                 }
1533         }
1534
1535         /**
1536          * initialise the magic variables (like CURRENTMONTHNAME)
1537          *
1538          * @access private
1539          */
1540         function initialiseVariables() {
1541                 global $wgVariableIDs;
1542                 $this->mVariables = array();
1543                 foreach ( $wgVariableIDs as $id ) {
1544                         $mw =& MagicWord::get( $id );
1545                         $mw->addToArray( $this->mVariables, $this->getVariableValue( $id ) );
1546                 }
1547         }
1548
1549         /**
1550          * Replace magic variables, templates, and template arguments
1551          * with the appropriate text. Templates are substituted recursively,
1552          * taking care to avoid infinite loops.
1553          *
1554          * Note that the substitution depends on value of $mOutputType:
1555          *  OT_WIKI: only {{subst:}} templates
1556          *  OT_MSG: only magic variables
1557          *  OT_HTML: all templates and magic variables
1558          *
1559          * @param string $tex The text to transform
1560          * @param array $args Key-value pairs representing template parameters to substitute
1561          * @access private
1562          */
1563         function replaceVariables( $text, $args = array() ) {
1564                 global $wgLang, $wgScript, $wgArticlePath;
1565
1566                 # Prevent too big inclusions
1567                 if(strlen($text)> MAX_INCLUDE_SIZE)
1568                 return $text;
1569
1570                 $fname = 'Parser::replaceVariables';
1571                 wfProfileIn( $fname );
1572
1573                 $titleChars = Title::legalChars();
1574
1575                 # This function is called recursively. To keep track of arguments we need a stack:
1576                 array_push( $this->mArgStack, $args );
1577
1578                 # PHP global rebinding syntax is a bit weird, need to use the GLOBALS array
1579                 $GLOBALS['wgCurParser'] =& $this;
1580
1581                 # Variable substitution
1582                 $text = preg_replace_callback( "/{{([$titleChars]*?)}}/", 'wfVariableSubstitution', $text );
1583
1584                 if ( $this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI ) {
1585                         # Argument substitution
1586                         $text = preg_replace_callback( "/{{{([$titleChars]*?)}}}/", 'wfArgSubstitution', $text );
1587                 }
1588                 # Template substitution
1589                 $regex = '/{{(['.$titleChars.']*)(\\|.*?|)}}/s';
1590                 $text = preg_replace_callback( $regex, 'wfBraceSubstitution', $text );
1591
1592                 array_pop( $this->mArgStack );
1593
1594                 wfProfileOut( $fname );
1595                 return $text;
1596         }
1597
1598         /**
1599          * Replace magic variables
1600          * @access private
1601          */
1602         function variableSubstitution( $matches ) {
1603                 if ( !$this->mVariables ) {
1604                         $this->initialiseVariables();
1605                 }
1606                 $skip = false;
1607                 if ( $this->mOutputType == OT_WIKI ) {
1608                         # Do only magic variables prefixed by SUBST
1609                         $mwSubst =& MagicWord::get( MAG_SUBST );
1610                         if (!$mwSubst->matchStartAndRemove( $matches[1] ))
1611                                 $skip = true;
1612                         # Note that if we don't substitute the variable below,
1613                         # we don't remove the {{subst:}} magic word, in case
1614                         # it is a template rather than a magic variable.
1615                 }
1616                 if ( !$skip && array_key_exists( $matches[1], $this->mVariables ) ) {
1617                         $text = $this->mVariables[$matches[1]];
1618                         $this->mOutput->mContainsOldMagic = true;
1619                 } else {
1620                         $text = $matches[0];
1621                 }
1622                 return $text;
1623         }
1624
1625         # Split template arguments
1626         function getTemplateArgs( $argsString ) {
1627                 if ( $argsString === '' ) {
1628                         return array();
1629                 }
1630
1631                 $args = explode( '|', substr( $argsString, 1 ) );
1632
1633                 # If any of the arguments contains a '[[' but no ']]', it needs to be
1634                 # merged with the next arg because the '|' character between belongs
1635                 # to the link syntax and not the template parameter syntax.
1636                 $argc = count($args);
1637                 $i = 0;
1638                 for ( $i = 0; $i < $argc-1; $i++ ) {
1639                         if ( substr_count ( $args[$i], '[[' ) != substr_count ( $args[$i], ']]' ) ) {
1640                                 $args[$i] .= '|'.$args[$i+1];
1641                                 array_splice($args, $i+1, 1);
1642                                 $i--;
1643                                 $argc--;
1644                         }
1645                 }
1646
1647                 return $args;
1648         }
1649
1650         /**
1651          * Return the text of a template, after recursively
1652          * replacing any variables or templates within the template.
1653          *
1654          * @param array $matches The parts of the template
1655          *  $matches[1]: the title, i.e. the part before the |
1656          *  $matches[2]: the parameters (including a leading |), if  any
1657          * @return string the text of the template
1658          * @access private
1659          */
1660         function braceSubstitution( $matches ) {
1661                 global $wgLinkCache, $wgContLang;
1662                 $fname = 'Parser::braceSubstitution';
1663                 $found = false;
1664                 $nowiki = false;
1665                 $noparse = false;
1666                 $itcamefromthedatabase = false;
1667
1668                 $title = NULL;
1669
1670                 # $part1 is the bit before the first |, and must contain only title characters
1671                 # $args is a list of arguments, starting from index 0, not including $part1
1672
1673                 $part1 = $matches[1];
1674                 # If the second subpattern matched anything, it will start with |
1675
1676                 $args = $this->getTemplateArgs($matches[2]);
1677                 $argc = count( $args );
1678
1679                 # {{{}}}
1680                 if ( strpos( $matches[0], '{{{' ) !== false ) {
1681                         $text = $matches[0];
1682                         $found = true;
1683                         $noparse = true;
1684                 }
1685
1686                 # SUBST
1687                 if ( !$found ) {
1688                         $mwSubst =& MagicWord::get( MAG_SUBST );
1689                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor ($this->mOutputType == OT_WIKI) ) {
1690                                 # One of two possibilities is true:
1691                                 # 1) Found SUBST but not in the PST phase
1692                                 # 2) Didn't find SUBST and in the PST phase
1693                                 # In either case, return without further processing
1694                                 $text = $matches[0];
1695                                 $found = true;
1696                                 $noparse = true;
1697                         }
1698                 }
1699
1700                 # MSG, MSGNW and INT
1701                 if ( !$found ) {
1702                         # Check for MSGNW:
1703                         $mwMsgnw =& MagicWord::get( MAG_MSGNW );
1704                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
1705                                 $nowiki = true;
1706                         } else {
1707                                 # Remove obsolete MSG:
1708                                 $mwMsg =& MagicWord::get( MAG_MSG );
1709                                 $mwMsg->matchStartAndRemove( $part1 );
1710                         }
1711
1712                         # Check if it is an internal message
1713                         $mwInt =& MagicWord::get( MAG_INT );
1714                         if ( $mwInt->matchStartAndRemove( $part1 ) ) {
1715                                 if ( $this->incrementIncludeCount( 'int:'.$part1 ) ) {
1716                                         $text = wfMsgReal( $part1, $args, true );
1717                                         $found = true;
1718                                 }
1719                         }
1720                 }
1721
1722                 # NS
1723                 if ( !$found ) {
1724                         # Check for NS: (namespace expansion)
1725                         $mwNs = MagicWord::get( MAG_NS );
1726                         if ( $mwNs->matchStartAndRemove( $part1 ) ) {
1727                                 if ( intval( $part1 ) ) {
1728                                         $text = $wgContLang->getNsText( intval( $part1 ) );
1729                                         $found = true;
1730                                 } else {
1731                                         $index = Namespace::getCanonicalIndex( strtolower( $part1 ) );
1732                                         if ( !is_null( $index ) ) {
1733                                                 $text = $wgContLang->getNsText( $index );
1734                                                 $found = true;
1735                                         }
1736                                 }
1737                         }
1738                 }
1739
1740                 # LOCALURL and LOCALURLE
1741                 if ( !$found ) {
1742                         $mwLocal = MagicWord::get( MAG_LOCALURL );
1743                         $mwLocalE = MagicWord::get( MAG_LOCALURLE );
1744
1745                         if ( $mwLocal->matchStartAndRemove( $part1 ) ) {
1746                                 $func = 'getLocalURL';
1747                         } elseif ( $mwLocalE->matchStartAndRemove( $part1 ) ) {
1748                                 $func = 'escapeLocalURL';
1749                         } else {
1750                                 $func = '';
1751                         }
1752
1753                         if ( $func !== '' ) {
1754                                 $title = Title::newFromText( $part1 );
1755                                 if ( !is_null( $title ) ) {
1756                                         if ( $argc > 0 ) {
1757                                                 $text = $title->$func( $args[0] );
1758                                         } else {
1759                                                 $text = $title->$func();
1760                                         }
1761                                         $found = true;
1762                                 }
1763                         }
1764                 }
1765
1766                 # GRAMMAR
1767                 if ( !$found && $argc == 1 ) {
1768                         $mwGrammar =& MagicWord::get( MAG_GRAMMAR );
1769                         if ( $mwGrammar->matchStartAndRemove( $part1 ) ) {
1770                                 $text = $wgContLang->convertGrammar( $args[0], $part1 );
1771                                 $found = true;
1772                         }
1773                 }
1774
1775                 # Template table test
1776
1777                 # Did we encounter this template already? If yes, it is in the cache
1778                 # and we need to check for loops.
1779                 if ( !$found && isset( $this->mTemplates[$part1] ) ) {
1780                         # set $text to cached message.
1781                         $text = $this->mTemplates[$part1];
1782                         $found = true;
1783
1784                         # Infinite loop test
1785                         if ( isset( $this->mTemplatePath[$part1] ) ) {
1786                                 $noparse = true;
1787                                 $found = true;
1788                                 $text .= '<!-- WARNING: template loop detected -->';
1789                         }
1790                 }
1791
1792                 # Load from database
1793                 if ( !$found ) {
1794                         $title = Title::newFromText( $part1, NS_TEMPLATE );
1795                         if ( !is_null( $title ) && !$title->isExternal() ) {
1796                                 # Check for excessive inclusion
1797                                 $dbk = $title->getPrefixedDBkey();
1798                                 if ( $this->incrementIncludeCount( $dbk ) ) {
1799                                         # This should never be reached.
1800                                         $article = new Article( $title );
1801                                         $articleContent = $article->getContentWithoutUsingSoManyDamnGlobals();
1802                                         if ( $articleContent !== false ) {
1803                                                 $found = true;
1804                                                 $text = $articleContent;
1805                                                 $itcamefromthedatabase = true;
1806                                         }
1807                                 }
1808
1809                                 # If the title is valid but undisplayable, make a link to it
1810                                 if ( $this->mOutputType == OT_HTML && !$found ) {
1811                                         $text = '[['.$title->getPrefixedText().']]';
1812                                         $found = true;
1813                                 }
1814
1815                                 # Template cache array insertion
1816                                 $this->mTemplates[$part1] = $text;
1817                         }
1818                 }
1819
1820                 # Recursive parsing, escaping and link table handling
1821                 # Only for HTML output
1822                 if ( $nowiki && $found && $this->mOutputType == OT_HTML ) {
1823                         $text = wfEscapeWikiText( $text );
1824                 } elseif ( ($this->mOutputType == OT_HTML || $this->mOutputType == OT_WIKI) && $found && !$noparse) {
1825                         # Clean up argument array
1826                         $assocArgs = array();
1827                         $index = 1;
1828                         foreach( $args as $arg ) {
1829                                 $eqpos = strpos( $arg, '=' );
1830                                 if ( $eqpos === false ) {
1831                                         $assocArgs[$index++] = $arg;
1832                                 } else {
1833                                         $name = trim( substr( $arg, 0, $eqpos ) );
1834                                         $value = trim( substr( $arg, $eqpos+1 ) );
1835                                         if ( $value === false ) {
1836                                                 $value = '';
1837                                         }
1838                                         if ( $name !== false ) {
1839                                                 $assocArgs[$name] = $value;
1840                                         }
1841                                 }
1842                         }
1843
1844                         # Add a new element to the templace recursion path
1845                         $this->mTemplatePath[$part1] = 1;
1846
1847                         $text = $this->strip( $text, $this->mStripState );
1848                         $text = $this->removeHTMLtags( $text );
1849                         $text = $this->replaceVariables( $text, $assocArgs );
1850
1851                         # Resume the link cache and register the inclusion as a link
1852                         if ( $this->mOutputType == OT_HTML && !is_null( $title ) ) {
1853                                 $wgLinkCache->addLinkObj( $title );
1854                         }
1855                 }
1856
1857                 # Empties the template path
1858                 $this->mTemplatePath = array();
1859                 if ( !$found ) {
1860                         return $matches[0];
1861                 } else {
1862                         # replace ==section headers==
1863                         # XXX this needs to go away once we have a better parser.
1864                         if ( $this->mOutputType != OT_WIKI && $itcamefromthedatabase ) {
1865                                 if( !is_null( $title ) )
1866                                         $encodedname = base64_encode($title->getPrefixedDBkey());
1867                                 else
1868                                         $encodedname = base64_encode("");
1869                                 $matches = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
1870                                         PREG_SPLIT_DELIM_CAPTURE);
1871                                 $text = '';
1872                                 $nsec = 0;
1873                                 for( $i = 0; $i < count($matches); $i += 2 ) {
1874                                         $text .= $matches[$i];
1875                                         if (!isset($matches[$i + 1]) || $matches[$i + 1] == "") continue;
1876                                         $hl = $matches[$i + 1];
1877                                         if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
1878                                                 $text .= $hl;
1879                                                 continue;
1880                                         }
1881                                         preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
1882                                         $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
1883                                                 . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
1884
1885                                         $nsec++;
1886                                 }
1887                         }
1888                         return $text;
1889                 }
1890         }
1891
1892         /**
1893          * Triple brace replacement -- used for template arguments
1894          * @access private
1895          */
1896         function argSubstitution( $matches ) {
1897                 $arg = trim( $matches[1] );
1898                 $text = $matches[0];
1899                 $inputArgs = end( $this->mArgStack );
1900
1901                 if ( array_key_exists( $arg, $inputArgs ) ) {
1902                         $text = $inputArgs[$arg];
1903                 }
1904
1905                 return $text;
1906         }
1907
1908         /**
1909          * Returns true if the function is allowed to include this entity
1910          * @access private
1911          */
1912         function incrementIncludeCount( $dbk ) {
1913                 if ( !array_key_exists( $dbk, $this->mIncludeCount ) ) {
1914                         $this->mIncludeCount[$dbk] = 0;
1915                 }
1916                 if ( ++$this->mIncludeCount[$dbk] <= MAX_INCLUDE_REPEAT ) {
1917                         return true;
1918                 } else {
1919                         return false;
1920                 }
1921         }
1922
1923
1924         /**
1925          * Cleans up HTML, removes dangerous tags and attributes, and
1926          * removes HTML comments
1927          * @access private
1928          */
1929         function removeHTMLtags( $text ) {
1930                 global $wgUseTidy, $wgUserHtml;
1931                 $fname = 'Parser::removeHTMLtags';
1932                 wfProfileIn( $fname );
1933
1934                 if( $wgUserHtml ) {
1935                         $htmlpairs = array( # Tags that must be closed
1936                                 'b', 'del', 'i', 'ins', 'u', 'font', 'big', 'small', 'sub', 'sup', 'h1',
1937                                 'h2', 'h3', 'h4', 'h5', 'h6', 'cite', 'code', 'em', 's',
1938                                 'strike', 'strong', 'tt', 'var', 'div', 'center',
1939                                 'blockquote', 'ol', 'ul', 'dl', 'table', 'caption', 'pre',
1940                                 'ruby', 'rt' , 'rb' , 'rp', 'p'
1941                         );
1942                         $htmlsingle = array(
1943                                 'br', 'hr', 'li', 'dt', 'dd'
1944                         );
1945                         $htmlnest = array( # Tags that can be nested--??
1946                                 'table', 'tr', 'td', 'th', 'div', 'blockquote', 'ol', 'ul',
1947                                 'dl', 'font', 'big', 'small', 'sub', 'sup'
1948                         );
1949                         $tabletags = array( # Can only appear inside table
1950                                 'td', 'th', 'tr'
1951                         );
1952                 } else {
1953                         $htmlpairs = array();
1954                         $htmlsingle = array();
1955                         $htmlnest = array();
1956                         $tabletags = array();
1957                 }
1958
1959                 $htmlsingle = array_merge( $tabletags, $htmlsingle );
1960                 $htmlelements = array_merge( $htmlsingle, $htmlpairs );
1961
1962                 $htmlattrs = $this->getHTMLattrs () ;
1963
1964                 # Remove HTML comments
1965                 $text = $this->removeHTMLcomments( $text );
1966
1967                 $bits = explode( '<', $text );
1968                 $text = array_shift( $bits );
1969                 if(!$wgUseTidy) {
1970                         $tagstack = array(); $tablestack = array();
1971                         foreach ( $bits as $x ) {
1972                                 $prev = error_reporting( E_ALL & ~( E_NOTICE | E_WARNING ) );
1973                                 preg_match( '/^(\\/?)(\\w+)([^>]*)(\\/{0,1}>)([^<]*)$/',
1974                                 $x, $regs );
1975                                 list( $qbar, $slash, $t, $params, $brace, $rest ) = $regs;
1976                                 error_reporting( $prev );
1977
1978                                 $badtag = 0 ;
1979                                 if ( in_array( $t = strtolower( $t ), $htmlelements ) ) {
1980                                         # Check our stack
1981                                         if ( $slash ) {
1982                                                 # Closing a tag...
1983                                                 if ( ! in_array( $t, $htmlsingle ) &&
1984                                                 ( $ot = @array_pop( $tagstack ) ) != $t ) {
1985                                                         @array_push( $tagstack, $ot );
1986                                                         $badtag = 1;
1987                                                 } else {
1988                                                         if ( $t == 'table' ) {
1989                                                                 $tagstack = array_pop( $tablestack );
1990                                                         }
1991                                                         $newparams = '';
1992                                                 }
1993                                         } else {
1994                                                 # Keep track for later
1995                                                 if ( in_array( $t, $tabletags ) &&
1996                                                 ! in_array( 'table', $tagstack ) ) {
1997                                                         $badtag = 1;
1998                                                 } else if ( in_array( $t, $tagstack ) &&
1999                                                 ! in_array ( $t , $htmlnest ) ) {
2000                                                         $badtag = 1 ;
2001                                                 } else if ( ! in_array( $t, $htmlsingle ) ) {
2002                                                         if ( $t == 'table' ) {
2003                                                                 array_push( $tablestack, $tagstack );
2004                                                                 $tagstack = array();
2005                                                         }
2006                                                         array_push( $tagstack, $t );
2007                                                 }
2008                                                 # Strip non-approved attributes from the tag
2009                                                 $newparams = $this->fixTagAttributes($params);
2010
2011                                         }
2012                                         if ( ! $badtag ) {
2013                                                 $rest = str_replace( '>', '&gt;', $rest );
2014                                                 $text .= "<$slash$t $newparams$brace$rest";
2015                                                 continue;
2016                                         }
2017                                 }
2018                                 $text .= '&lt;' . str_replace( '>', '&gt;', $x);
2019                         }
2020                         # Close off any remaining tags
2021                         while ( is_array( $tagstack ) && ($t = array_pop( $tagstack )) ) {
2022                                 $text .= "</$t>\n";
2023                                 if ( $t == 'table' ) { $tagstack = array_pop( $tablestack ); }
2024                         }
2025                 } else {
2026                         # this might be possible using tidy itself
2027                         foreach ( $bits as $x ) {
2028                                 preg_match( '/^(\\/?)(\\w+)([^>]*)(\\/{0,1}>)([^<]*)$/',
2029                                 $x, $regs );
2030                                 @list( $qbar, $slash, $t, $params, $brace, $rest ) = $regs;
2031                                 if ( in_array( $t = strtolower( $t ), $htmlelements ) ) {
2032                                         $newparams = $this->fixTagAttributes($params);
2033                                         $rest = str_replace( '>', '&gt;', $rest );
2034                                         $text .= "<$slash$t $newparams$brace$rest";
2035                                 } else {
2036                                         $text .= '&lt;' . str_replace( '>', '&gt;', $x);
2037                                 }
2038                         }
2039                 }
2040                 wfProfileOut( $fname );
2041                 return $text;
2042         }
2043
2044         /**
2045          * Remove '<!--', '-->', and everything between.
2046          * To avoid leaving blank lines, when a comment is both preceded
2047          * and followed by a newline (ignoring spaces), trim leading and
2048          * trailing spaces and one of the newlines.
2049          *
2050          * @access private
2051          */
2052         function removeHTMLcomments( $text ) {
2053                 $fname='Parser::removeHTMLcomments';
2054                 wfProfileIn( $fname );
2055                 while (($start = strpos($text, '<!--')) !== false) {
2056                         $end = strpos($text, '-->', $start + 4);
2057                         if ($end === false) {
2058                                 # Unterminated comment; bail out
2059                                 break;
2060                         }
2061
2062                         $end += 3;
2063
2064                         # Trim space and newline if the comment is both
2065                         # preceded and followed by a newline
2066                         $spaceStart = max($start - 1, 0);
2067                         $spaceLen = $end - $spaceStart;
2068                         while (substr($text, $spaceStart, 1) === ' ' && $spaceStart > 0) {
2069                                 $spaceStart--;
2070                                 $spaceLen++;
2071                         }
2072                         while (substr($text, $spaceStart + $spaceLen, 1) === ' ')
2073                                 $spaceLen++;
2074                         if (substr($text, $spaceStart, 1) === "\n" and substr($text, $spaceStart + $spaceLen, 1) === "\n") {
2075                                 # Remove the comment, leading and trailing
2076                                 # spaces, and leave only one newline.
2077                                 $text = substr_replace($text, "\n", $spaceStart, $spaceLen + 1);
2078                         }
2079                         else {
2080                                 # Remove just the comment.
2081                                 $text = substr_replace($text, '', $start, $end - $start);
2082                         }
2083                 }
2084                 wfProfileOut( $fname );
2085                 return $text;
2086         }
2087
2088         /**
2089          * This function accomplishes several tasks:
2090          * 1) Auto-number headings if that option is enabled
2091          * 2) Add an [edit] link to sections for logged in users who have enabled the option
2092          * 3) Add a Table of contents on the top for users who have enabled the option
2093          * 4) Auto-anchor headings
2094          *
2095          * It loops through all headlines, collects the necessary data, then splits up the
2096          * string and re-inserts the newly formatted headlines.
2097          * @access private
2098          */
2099         /* private */ function formatHeadings( $text, $isMain=true ) {
2100                 global $wgInputEncoding, $wgMaxTocLevel, $wgContLang, $wgLinkHolders;
2101
2102                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
2103                 $doShowToc = $this->mOptions->getShowToc();
2104                 $forceTocHere = false;
2105                 if( !$this->mTitle->userCanEdit() ) {
2106                         $showEditLink = 0;
2107                         $rightClickHack = 0;
2108                 } else {
2109                         $showEditLink = $this->mOptions->getEditSection();
2110                         $rightClickHack = $this->mOptions->getEditSectionOnRightClick();
2111                 }
2112
2113                 # Inhibit editsection links if requested in the page
2114                 $esw =& MagicWord::get( MAG_NOEDITSECTION );
2115                 if( $esw->matchAndRemove( $text ) ) {
2116                         $showEditLink = 0;
2117                 }
2118                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
2119                 # do not add TOC
2120                 $mw =& MagicWord::get( MAG_NOTOC );
2121                 if( $mw->matchAndRemove( $text ) ) {
2122                         $doShowToc = 0;
2123                 }
2124
2125                 # never add the TOC to the Main Page. This is an entry page that should not
2126                 # be more than 1-2 screens large anyway
2127                 if( $this->mTitle->getPrefixedText() == wfMsg('mainpage') ) {
2128                         $doShowToc = 0;
2129                 }
2130
2131                 # Get all headlines for numbering them and adding funky stuff like [edit]
2132                 # links - this is for later, but we need the number of headlines right now
2133                 $numMatches = preg_match_all( '/<H([1-6])(.*?' . '>)(.*?)<\/H[1-6]>/i', $text, $matches );
2134
2135                 # if there are fewer than 4 headlines in the article, do not show TOC
2136                 if( $numMatches < 4 ) {
2137                         $doShowToc = 0;
2138                 }
2139
2140                 # if the string __TOC__ (not case-sensitive) occurs in the HTML,
2141                 # override above conditions and always show TOC at that place
2142                 $mw =& MagicWord::get( MAG_TOC );
2143                 if ($mw->match( $text ) ) {
2144                         $doShowToc = 1;
2145                         $forceTocHere = true;
2146                 } else {
2147                         # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
2148                         # override above conditions and always show TOC above first header
2149                         $mw =& MagicWord::get( MAG_FORCETOC );
2150                         if ($mw->matchAndRemove( $text ) ) {
2151                                 $doShowToc = 1;
2152                         }
2153                 }
2154
2155
2156
2157                 # We need this to perform operations on the HTML
2158                 $sk =& $this->mOptions->getSkin();
2159
2160                 # headline counter
2161                 $headlineCount = 0;
2162                 $sectionCount = 0; # headlineCount excluding template sections
2163
2164                 # Ugh .. the TOC should have neat indentation levels which can be
2165                 # passed to the skin functions. These are determined here
2166                 $toclevel = 0;
2167                 $toc = '';
2168                 $full = '';
2169                 $head = array();
2170                 $sublevelCount = array();
2171                 $level = 0;
2172                 $prevlevel = 0;
2173                 foreach( $matches[3] as $headline ) {
2174                         $istemplate = 0;
2175                         $templatetitle = "";
2176                         $templatesection = 0;
2177
2178                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
2179                                 $istemplate = 1;
2180                                 $templatetitle = base64_decode($mat[1]);
2181                                 $templatesection = 1 + (int)base64_decode($mat[2]);
2182                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
2183                         }
2184
2185                         $numbering = '';
2186                         if( $level ) {
2187                                 $prevlevel = $level;
2188                         }
2189                         $level = $matches[1][$headlineCount];
2190                         if( ( $doNumberHeadings || $doShowToc ) && $prevlevel && $level > $prevlevel ) {
2191                                 # reset when we enter a new level
2192                                 $sublevelCount[$level] = 0;
2193                                 $toc .= $sk->tocIndent( $level - $prevlevel );
2194                                 $toclevel += $level - $prevlevel;
2195                         }
2196                         if( ( $doNumberHeadings || $doShowToc ) && $level < $prevlevel ) {
2197                                 # reset when we step back a level
2198                                 $sublevelCount[$level+1]=0;
2199                                 $toc .= $sk->tocUnindent( $prevlevel - $level );
2200                                 $toclevel -= $prevlevel - $level;
2201                         }
2202                         # count number of headlines for each level
2203                         @$sublevelCount[$level]++;
2204                         if( $doNumberHeadings || $doShowToc ) {
2205                                 $dot = 0;
2206                                 for( $i = 1; $i <= $level; $i++ ) {
2207                                         if( !empty( $sublevelCount[$i] ) ) {
2208                                                 if( $dot ) {
2209                                                         $numbering .= '.';
2210                                                 }
2211                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
2212                                                 $dot = 1;
2213                                         }
2214                                 }
2215                         }
2216
2217                         # The canonized header is a version of the header text safe to use for links
2218                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
2219                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
2220                         $canonized_headline = $this->unstripNoWiki( $headline, $this->mStripState );
2221
2222                         # Remove link placeholders by the link text.
2223                         #     <!--LINK number-->
2224                         # turns into
2225                         #     link text with suffix
2226                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
2227                                                             "\$wgLinkHolders['texts'][\$1]",
2228                                                             $canonized_headline );
2229
2230                         # strip out HTML
2231                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
2232                         $tocline = trim( $canonized_headline );
2233                         $canonized_headline = urlencode( do_html_entity_decode( str_replace(' ', '_', $tocline), ENT_COMPAT, $wgInputEncoding ) );
2234                         $replacearray = array(
2235                                 '%3A' => ':',
2236                                 '%' => '.'
2237                         );
2238                         $canonized_headline = str_replace(array_keys($replacearray),array_values($replacearray),$canonized_headline);
2239                         $refer[$headlineCount] = $canonized_headline;
2240
2241                         # count how many in assoc. array so we can track dupes in anchors
2242                         @$refers[$canonized_headline]++;
2243                         $refcount[$headlineCount]=$refers[$canonized_headline];
2244
2245                         # Prepend the number to the heading text
2246
2247                         if( $doNumberHeadings || $doShowToc ) {
2248                                 $tocline = $numbering . ' ' . $tocline;
2249
2250                                 # Don't number the heading if it is the only one (looks silly)
2251                                 if( $doNumberHeadings && count( $matches[3] ) > 1) {
2252                                         # the two are different if the line contains a link
2253                                         $headline=$numbering . ' ' . $headline;
2254                                 }
2255                         }
2256
2257                         # Create the anchor for linking from the TOC to the section
2258                         $anchor = $canonized_headline;
2259                         if($refcount[$headlineCount] > 1 ) {
2260                                 $anchor .= '_' . $refcount[$headlineCount];
2261                         }
2262                         if( $doShowToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
2263                                 $toc .= $sk->tocLine($anchor,$tocline,$toclevel);
2264                         }
2265                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
2266                                 if ( empty( $head[$headlineCount] ) ) {
2267                                         $head[$headlineCount] = '';
2268                                 }
2269                                 if( $istemplate )
2270                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
2271                                 else
2272                                         $head[$headlineCount] .= $sk->editSectionLink($sectionCount+1);
2273                         }
2274
2275                         # Add the edit section span
2276                         if( $rightClickHack ) {
2277                                 if( $istemplate )
2278                                         $headline = $sk->editSectionScriptForOther($templatetitle, $templatesection, $headline);
2279                                 else
2280                                         $headline = $sk->editSectionScript($sectionCount+1,$headline);
2281                         }
2282
2283                         # give headline the correct <h#> tag
2284                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline.'</h'.$level.'>';
2285
2286                         $headlineCount++;
2287                         if( !$istemplate )
2288                                 $sectionCount++;
2289                 }
2290
2291                 if( $doShowToc ) {
2292                         $toclines = $headlineCount;
2293                         $toc .= $sk->tocUnindent( $toclevel );
2294                         $toc = $sk->tocTable( $toc );
2295                 }
2296
2297                 # split up and insert constructed headlines
2298
2299                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
2300                 $i = 0;
2301
2302                 foreach( $blocks as $block ) {
2303                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
2304                                 # This is the [edit] link that appears for the top block of text when
2305                                 # section editing is enabled
2306
2307                                 # Disabled because it broke block formatting
2308                                 # For example, a bullet point in the top line
2309                                 # $full .= $sk->editSectionLink(0);
2310                         }
2311                         $full .= $block;
2312                         if( $doShowToc && !$i && $isMain && !$forceTocHere) {
2313                         # Top anchor now in skin
2314                                 $full = $full.$toc;
2315                         }
2316
2317                         if( !empty( $head[$i] ) ) {
2318                                 $full .= $head[$i];
2319                         }
2320                         $i++;
2321                 }
2322                 if($forceTocHere) {
2323                         $mw =& MagicWord::get( MAG_TOC );
2324                         return $mw->replace( $toc, $full );
2325                 } else {
2326                         return $full;
2327                 }
2328         }
2329
2330         /**
2331          * Return an HTML link for the "ISBN 123456" text
2332          * @access private
2333          */
2334         function magicISBN( $text ) {
2335                 global $wgLang;
2336                 $fname = 'Parser::magicISBN';
2337                 wfProfileIn( $fname );
2338
2339                 $a = split( 'ISBN ', ' '.$text );
2340                 if ( count ( $a ) < 2 ) {
2341                         wfProfileOut( $fname );
2342                         return $text;
2343                 }
2344                 $text = substr( array_shift( $a ), 1);
2345                 $valid = '0123456789-ABCDEFGHIJKLMNOPQRSTUVWXYZ';
2346
2347                 foreach ( $a as $x ) {
2348                         $isbn = $blank = '' ;
2349                         while ( ' ' == $x{0} ) {
2350                                 $blank .= ' ';
2351                                 $x = substr( $x, 1 );
2352                         }
2353                         if ( $x == '' ) { # blank isbn
2354                                 $text .= "ISBN $blank";
2355                                 continue;
2356                         }
2357                         while ( strstr( $valid, $x{0} ) != false ) {
2358                                 $isbn .= $x{0};
2359                                 $x = substr( $x, 1 );
2360                         }
2361                         $num = str_replace( '-', '', $isbn );
2362                         $num = str_replace( ' ', '', $num );
2363
2364                         if ( '' == $num ) {
2365                                 $text .= "ISBN $blank$x";
2366                         } else {
2367                                 $titleObj = Title::makeTitle( NS_SPECIAL, 'Booksources' );
2368                                 $text .= '<a href="' .
2369                                 $titleObj->escapeLocalUrl( 'isbn='.$num ) .
2370                                         "\" class=\"internal\">ISBN $isbn</a>";
2371                                 $text .= $x;
2372                         }
2373                 }
2374                 wfProfileOut( $fname );
2375                 return $text;
2376         }
2377
2378         /**
2379          * Return an HTML link for the "GEO ..." text
2380          * @access private
2381          */
2382         function magicGEO( $text ) {
2383                 global $wgLang, $wgUseGeoMode;
2384                 $fname = 'Parser::magicGEO';
2385                 wfProfileIn( $fname );
2386
2387                 # These next five lines are only for the ~35000 U.S. Census Rambot pages...
2388                 $directions = array ( 'N' => 'North' , 'S' => 'South' , 'E' => 'East' , 'W' => 'West' ) ;
2389                 $text = preg_replace ( "/(\d+)&deg;(\d+)'(\d+)\" {$directions['N']}, (\d+)&deg;(\d+)'(\d+)\" {$directions['W']}/" , "(GEO +\$1.\$2.\$3:-\$4.\$5.\$6)" , $text ) ;
2390                 $text = preg_replace ( "/(\d+)&deg;(\d+)'(\d+)\" {$directions['N']}, (\d+)&deg;(\d+)'(\d+)\" {$directions['E']}/" , "(GEO +\$1.\$2.\$3:+\$4.\$5.\$6)" , $text ) ;
2391                 $text = preg_replace ( "/(\d+)&deg;(\d+)'(\d+)\" {$directions['S']}, (\d+)&deg;(\d+)'(\d+)\" {$directions['W']}/" , "(GEO +\$1.\$2.\$3:-\$4.\$5.\$6)" , $text ) ;
2392                 $text = preg_replace ( "/(\d+)&deg;(\d+)'(\d+)\" {$directions['S']}, (\d+)&deg;(\d+)'(\d+)\" {$directions['E']}/" , "(GEO +\$1.\$2.\$3:+\$4.\$5.\$6)" , $text ) ;
2393
2394                 $a = split( 'GEO ', ' '.$text );
2395                 if ( count ( $a ) < 2 ) {
2396                         wfProfileOut( $fname );
2397                         return $text;
2398                 }
2399                 $text = substr( array_shift( $a ), 1);
2400                 $valid = '0123456789.+-:';
2401
2402                 foreach ( $a as $x ) {
2403                         $geo = $blank = '' ;
2404                         while ( ' ' == $x{0} ) {
2405                                 $blank .= ' ';
2406                                 $x = substr( $x, 1 );
2407                         }
2408                         while ( strstr( $valid, $x{0} ) != false ) {
2409                                 $geo .= $x{0};
2410                                 $x = substr( $x, 1 );
2411                         }
2412                         $num = str_replace( '+', '', $geo );
2413                         $num = str_replace( ' ', '', $num );
2414
2415                         if ( '' == $num || count ( explode ( ':' , $num , 3 ) ) < 2 ) {
2416                                 $text .= "GEO $blank$x";
2417                         } else {
2418                                 $titleObj = Title::makeTitle( NS_SPECIAL, 'Geo' );
2419                                 $text .= '<a href="' .
2420                                 $titleObj->escapeLocalUrl( 'coordinates='.$num ) .
2421                                         "\" class=\"internal\">GEO $geo</a>";
2422                                 $text .= $x;
2423                         }
2424                 }
2425                 wfProfileOut( $fname );
2426                 return $text;
2427         }
2428
2429         /**
2430          * Return an HTML link for the "RFC 1234" text
2431          * @access private
2432          * @param string $text text to be processed
2433          */
2434         function magicRFC( $text ) {
2435                 global $wgLang;
2436
2437                 $valid = '0123456789';
2438                 $internal = false;
2439
2440                 $a = split( 'RFC ', ' '.$text );
2441                 if ( count ( $a ) < 2 ) return $text;
2442                 $text = substr( array_shift( $a ), 1);
2443
2444                 /* Check if RFC keyword is preceed by [[.
2445                  * This test is made here cause of the array_shift above
2446                  * that prevent the test to be done in the foreach.
2447                  */
2448                 if(substr($text, -2) == '[[') { $internal = true; }
2449
2450                 foreach ( $a as $x ) {
2451                         /* token might be empty if we have RFC RFC 1234 */
2452                         if($x=='') {
2453                                 $text.='RFC ';
2454                                 continue;
2455                                 }
2456
2457                         $rfc = $blank = '' ;
2458
2459                         /** remove and save whitespaces in $blank */
2460                         while ( $x{0} == ' ' ) {
2461                                 $blank .= ' ';
2462                                 $x = substr( $x, 1 );
2463                         }
2464
2465                         /** remove and save the rfc number in $rfc */
2466                         while ( strstr( $valid, $x{0} ) != false ) {
2467                                 $rfc .= $x{0};
2468                                 $x = substr( $x, 1 );
2469                         }
2470
2471                         if ( $rfc == '') {
2472                                 /* call back stripped spaces*/
2473                                 $text .= "RFC $blank$x";
2474                         } elseif( $internal) {
2475                                 /* normal link */
2476                                 $text .= "RFC $rfc$x";
2477                         } else {
2478                                 /* build the external link*/
2479                                 $url = wfmsg( 'rfcurl' );
2480                                 $url = str_replace( '$1', $rfc, $url);
2481                                 $sk =& $this->mOptions->getSkin();
2482                                 $la = $sk->getExternalLinkAttributes( $url, 'RFC '.$rfc );
2483                                 $text .= "<a href='{$url}'{$la}>RFC {$rfc}</a>{$x}";
2484                         }
2485
2486                         /* Check if the next RFC keyword is preceed by [[ */
2487                         $internal = (substr($x,-2) == '[[');
2488                 }
2489                 return $text;
2490         }
2491
2492         /**
2493          * Transform wiki markup when saving a page by doing \r\n -> \n
2494          * conversion, substitting signatures, {{subst:}} templates, etc.
2495          *
2496          * @param string $text the text to transform
2497          * @param Title &$title the Title object for the current article
2498          * @param User &$user the User object describing the current user
2499          * @param ParserOptions $options parsing options
2500          * @param bool $clearState whether to clear the parser state first
2501          * @return string the altered wiki markup
2502          * @access public
2503          */
2504         function preSaveTransform( $text, &$title, &$user, $options, $clearState = true ) {
2505                 $this->mOptions = $options;
2506                 $this->mTitle =& $title;
2507                 $this->mOutputType = OT_WIKI;
2508
2509                 if ( $clearState ) {
2510                         $this->clearState();
2511                 }
2512
2513                 $stripState = false;
2514                 $pairs = array(
2515                         "\r\n" => "\n",
2516                         );
2517                 $text = str_replace(array_keys($pairs), array_values($pairs), $text);
2518                 // now with regexes
2519                 /*
2520                 $pairs = array(
2521                         "/<br.+(clear|break)=[\"']?(all|both)[\"']?\\/?>/i" => '<br style="clear:both;"/>',
2522                         "/<br *?>/i" => "<br />",
2523                 );
2524                 $text = preg_replace(array_keys($pairs), array_values($pairs), $text);
2525                 */
2526                 $text = $this->strip( $text, $stripState, false );
2527                 $text = $this->pstPass2( $text, $user );
2528                 $text = $this->unstrip( $text, $stripState );
2529                 $text = $this->unstripNoWiki( $text, $stripState );
2530                 return $text;
2531         }
2532
2533         /**
2534          * Pre-save transform helper function
2535          * @access private
2536          */
2537         function pstPass2( $text, &$user ) {
2538                 global $wgLang, $wgContLang, $wgLocaltimezone, $wgCurParser;
2539
2540                 # Variable replacement
2541                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
2542                 $text = $this->replaceVariables( $text );
2543
2544                 # Signatures
2545                 #
2546                 $n = $user->getName();
2547                 $k = $user->getOption( 'nickname' );
2548                 if ( '' == $k ) { $k = $n; }
2549                 if(isset($wgLocaltimezone)) {
2550                         $oldtz = getenv('TZ'); putenv('TZ='.$wgLocaltimezone);
2551                 }
2552                 /* Note: this is an ugly timezone hack for the European wikis */
2553                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false ) .
2554                   ' (' . date( 'T' ) . ')';
2555                 if(isset($wgLocaltimezone)) putenv('TZ='.$oldtzs);
2556
2557                 $text = preg_replace( '/~~~~~/', $d, $text );
2558                 $text = preg_replace( '/~~~~/', '[[' . $wgContLang->getNsText( NS_USER ) . ":$n|$k]] $d", $text );
2559                 $text = preg_replace( '/~~~/', '[[' . $wgContLang->getNsText( NS_USER ) . ":$n|$k]]", $text );
2560
2561                 # Context links: [[|name]] and [[name (context)|]]
2562                 #
2563                 $tc = "[&;%\\-,.\\(\\)' _0-9A-Za-z\\/:\\x80-\\xff]";
2564                 $np = "[&;%\\-,.' _0-9A-Za-z\\/:\\x80-\\xff]"; # No parens
2565                 $namespacechar = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
2566                 $conpat = "/^({$np}+) \\(({$tc}+)\\)$/";
2567
2568                 $p1 = "/\[\[({$np}+) \\(({$np}+)\\)\\|]]/";             # [[page (context)|]]
2569                 $p2 = "/\[\[\\|({$tc}+)]]/";                                    # [[|page]]
2570                 $p3 = "/\[\[(:*$namespacechar+):({$np}+)\\|]]/";                # [[namespace:page|]] and [[:namespace:page|]]
2571                 $p4 = "/\[\[(:*$namespacechar+):({$np}+) \\(({$np}+)\\)\\|]]/"; # [[ns:page (cont)|]] and [[:ns:page (cont)|]]
2572                 $context = '';
2573                 $t = $this->mTitle->getText();
2574                 if ( preg_match( $conpat, $t, $m ) ) {
2575                         $context = $m[2];
2576                 }
2577                 $text = preg_replace( $p4, '[[\\1:\\2 (\\3)|\\2]]', $text );
2578                 $text = preg_replace( $p1, '[[\\1 (\\2)|\\1]]', $text );
2579                 $text = preg_replace( $p3, '[[\\1:\\2|\\2]]', $text );
2580
2581                 if ( '' == $context ) {
2582                         $text = preg_replace( $p2, '[[\\1]]', $text );
2583                 } else {
2584                         $text = preg_replace( $p2, "[[\\1 ({$context})|\\1]]", $text );
2585                 }
2586
2587                 # Trim trailing whitespace
2588                 # MAG_END (__END__) tag allows for trailing
2589                 # whitespace to be deliberately included
2590                 $text = rtrim( $text );
2591                 $mw =& MagicWord::get( MAG_END );
2592                 $mw->matchAndRemove( $text );
2593
2594                 return $text;
2595         }
2596
2597         /**
2598          * Set up some variables which are usually set up in parse()
2599          * so that an external function can call some class members with confidence
2600          * @access public
2601          */
2602         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
2603                 $this->mTitle =& $title;
2604                 $this->mOptions = $options;
2605                 $this->mOutputType = $outputType;
2606                 if ( $clearState ) {
2607                         $this->clearState();
2608                 }
2609         }
2610
2611         /**
2612          * Transform a MediaWiki message by replacing magic variables.
2613          *
2614          * @param string $text the text to transform
2615          * @param ParserOptions $options  options
2616          * @return string the text with variables substituted
2617          * @access public
2618          */
2619         function transformMsg( $text, $options ) {
2620                 global $wgTitle;
2621                 static $executing = false;
2622
2623                 # Guard against infinite recursion
2624                 if ( $executing ) {
2625                         return $text;
2626                 }
2627                 $executing = true;
2628
2629                 $this->mTitle = $wgTitle;
2630                 $this->mOptions = $options;
2631                 $this->mOutputType = OT_MSG;
2632                 $this->clearState();
2633                 $text = $this->replaceVariables( $text );
2634
2635                 $executing = false;
2636                 return $text;
2637         }
2638
2639         /**
2640          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
2641          * Callback will be called with the text within
2642          * Transform and return the text within
2643          * @access public
2644          */
2645         function setHook( $tag, $callback ) {
2646                 $oldVal = @$this->mTagHooks[$tag];
2647                 $this->mTagHooks[$tag] = $callback;
2648                 return $oldVal;
2649         }
2650 }
2651
2652 /**
2653  * @todo document
2654  * @package MediaWiki
2655  */
2656 class ParserOutput
2657 {
2658         var $mText, $mLanguageLinks, $mCategoryLinks, $mContainsOldMagic;
2659         var $mCacheTime; # Used in ParserCache
2660
2661         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
2662                 $containsOldMagic = false )
2663         {
2664                 $this->mText = $text;
2665                 $this->mLanguageLinks = $languageLinks;
2666                 $this->mCategoryLinks = $categoryLinks;
2667                 $this->mContainsOldMagic = $containsOldMagic;
2668                 $this->mCacheTime = '';
2669         }
2670
2671         function getText() { return $this->mText; }
2672         function getLanguageLinks() { return $this->mLanguageLinks; }
2673         function getCategoryLinks() { return $this->mCategoryLinks; }
2674         function getCacheTime() { return $this->mCacheTime; }
2675         function containsOldMagic() { return $this->mContainsOldMagic; }
2676         function setText( $text ) { return wfSetVar( $this->mText, $text ); }
2677         function setLanguageLinks( $ll ) { return wfSetVar( $this->mLanguageLinks, $ll ); }
2678         function setCategoryLinks( $cl ) { return wfSetVar( $this->mCategoryLinks, $cl ); }
2679         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
2680         function setCacheTime( $t ) { return wfSetVar( $this->mCacheTime, $t ); }
2681
2682         function merge( $other ) {
2683                 $this->mLanguageLinks = array_merge( $this->mLanguageLinks, $other->mLanguageLinks );
2684                 $this->mCategoryLinks = array_merge( $this->mCategoryLinks, $this->mLanguageLinks );
2685                 $this->mContainsOldMagic = $this->mContainsOldMagic || $other->mContainsOldMagic;
2686         }
2687
2688 }
2689
2690 /**
2691  * Set options of the Parser
2692  * @todo document
2693  * @package MediaWiki
2694  */
2695 class ParserOptions
2696 {
2697         # All variables are private
2698         var $mUseTeX;                    # Use texvc to expand <math> tags
2699         var $mUseDynamicDates;           # Use $wgDateFormatter to format dates
2700         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
2701         var $mAllowExternalImages;       # Allow external images inline
2702         var $mSkin;                      # Reference to the preferred skin
2703         var $mDateFormat;                # Date format index
2704         var $mEditSection;               # Create "edit section" links
2705         var $mEditSectionOnRightClick;   # Generate JavaScript to edit section on right click
2706         var $mNumberHeadings;            # Automatically number headings
2707         var $mShowToc;                   # Show table of contents
2708
2709         function getUseTeX()                        { return $this->mUseTeX; }
2710         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
2711         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
2712         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
2713         function getSkin()                          { return $this->mSkin; }
2714         function getDateFormat()                    { return $this->mDateFormat; }
2715         function getEditSection()                   { return $this->mEditSection; }
2716         function getEditSectionOnRightClick()       { return $this->mEditSectionOnRightClick; }
2717         function getNumberHeadings()                { return $this->mNumberHeadings; }
2718         function getShowToc()                       { return $this->mShowToc; }
2719
2720         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
2721         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
2722         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
2723         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
2724         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
2725         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
2726         function setEditSectionOnRightClick( $x )   { return wfSetVar( $this->mEditSectionOnRightClick, $x ); }
2727         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
2728         function setShowToc( $x )                   { return wfSetVar( $this->mShowToc, $x ); }
2729
2730         function setSkin( &$x ) { $this->mSkin =& $x; }
2731
2732         # Get parser options
2733         /* static */ function newFromUser( &$user ) {
2734                 $popts = new ParserOptions;
2735                 $popts->initialiseFromUser( $user );
2736                 return $popts;
2737         }
2738
2739         # Get user options
2740         function initialiseFromUser( &$userInput ) {
2741                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
2742
2743                 $fname = 'ParserOptions::initialiseFromUser';
2744                 wfProfileIn( $fname );
2745                 if ( !$userInput ) {
2746                         $user = new User;
2747                         $user->setLoaded( true );
2748                 } else {
2749                         $user =& $userInput;
2750                 }
2751
2752                 $this->mUseTeX = $wgUseTeX;
2753                 $this->mUseDynamicDates = $wgUseDynamicDates;
2754                 $this->mInterwikiMagic = $wgInterwikiMagic;
2755                 $this->mAllowExternalImages = $wgAllowExternalImages;
2756                 wfProfileIn( $fname.'-skin' );
2757                 $this->mSkin =& $user->getSkin();
2758                 wfProfileOut( $fname.'-skin' );
2759                 $this->mDateFormat = $user->getOption( 'date' );
2760                 $this->mEditSection = $user->getOption( 'editsection' );
2761                 $this->mEditSectionOnRightClick = $user->getOption( 'editsectiononrightclick' );
2762                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
2763                 $this->mShowToc = $user->getOption( 'showtoc' );
2764                 wfProfileOut( $fname );
2765         }
2766
2767
2768 }
2769
2770 # Regex callbacks, used in Parser::replaceVariables
2771 function wfBraceSubstitution( $matches ) {
2772         global $wgCurParser;
2773         return $wgCurParser->braceSubstitution( $matches );
2774 }
2775
2776 function wfArgSubstitution( $matches ) {
2777         global $wgCurParser;
2778         return $wgCurParser->argSubstitution( $matches );
2779 }
2780
2781 function wfVariableSubstitution( $matches ) {
2782         global $wgCurParser;
2783         return $wgCurParser->variableSubstitution( $matches );
2784 }
2785
2786 /**
2787  * Return the total number of articles
2788  */
2789 function wfNumberOfArticles() {
2790         global $wgNumberOfArticles;
2791
2792         wfLoadSiteStats();
2793         return $wgNumberOfArticles;
2794 }
2795
2796 /**
2797  * Get various statistics from the database
2798  * @private
2799  */
2800 function wfLoadSiteStats() {
2801         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
2802         $fname = 'wfLoadSiteStats';
2803
2804         if ( -1 != $wgNumberOfArticles ) return;
2805         $dbr =& wfGetDB( DB_SLAVE );
2806         $s = $dbr->getArray( 'site_stats',
2807                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
2808                 array( 'ss_row_id' => 1 ), $fname
2809         );
2810
2811         if ( $s === false ) {
2812                 return;
2813         } else {
2814                 $wgTotalViews = $s->ss_total_views;
2815                 $wgTotalEdits = $s->ss_total_edits;
2816                 $wgNumberOfArticles = $s->ss_good_articles;
2817         }
2818 }
2819
2820 function wfEscapeHTMLTagsOnly( $in ) {
2821         return str_replace(
2822                 array( '"', '>', '<' ),
2823                 array( '&quot;', '&gt;', '&lt;' ),
2824                 $in );
2825 }
2826
2827 ?>