includes/Parser.php

   1 <?php
   2 /**
   3  * File for Parser and related classes
   4  *
   5  * @package MediaWiki
   6  * @subpackage Parser
   7  */
   8
   9 /**
  10  * Update this version number when the ParserOutput format
  11  * changes in an incompatible way, so the parser cache
  12  * can automatically discard old data.
  13  */
  14 define( 'MW_PARSER_VERSION', '1.6.1' );
  15
  16 define( 'RLH_FOR_UPDATE', 1 );
  17
  18 # Allowed values for $mOutputType
  19 define( 'OT_HTML', 1 );
  20 define( 'OT_WIKI', 2 );
  21 define( 'OT_MSG' , 3 );
  22 define( 'OT_PREPROCESS', 4 );
  23
  24 # Flags for setFunctionHook
  25 define( 'SFH_NO_HASH', 1 );
  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 # Constants needed for external link processing
  34 define( 'HTTP_PROTOCOLS', 'http:\/\/|https:\/\/' );
  35 # Everything except bracket, space, or control characters
  36 define( 'EXT_LINK_URL_CLASS', '[^][<>"\\x00-\\x20\\x7F]' );
  37 # Including space, but excluding newlines
  38 define( 'EXT_LINK_TEXT_CLASS', '[^\]\\x0a\\x0d]' );
  39 define( 'EXT_IMAGE_FNAME_CLASS', '[A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]' );
  40 define( 'EXT_IMAGE_EXTENSIONS', 'gif|png|jpg|jpeg' );
  41 define( 'EXT_LINK_BRACKETED',  '/\[(\b(' . wfUrlProtocols() . ')'.
  42         EXT_LINK_URL_CLASS.'+) *('.EXT_LINK_TEXT_CLASS.'*?)\]/S' );
  43 define( 'EXT_IMAGE_REGEX',
  44         '/^('.HTTP_PROTOCOLS.')'.  # Protocol
  45         '('.EXT_LINK_URL_CLASS.'+)\\/'.  # Hostname and path
  46         '('.EXT_IMAGE_FNAME_CLASS.'+)\\.((?i)'.EXT_IMAGE_EXTENSIONS.')$/S' # Filename
  47 );
  48
  49 // State constants for the definition list colon extraction
  50 define( 'MW_COLON_STATE_TEXT', 0 );
  51 define( 'MW_COLON_STATE_TAG', 1 );
  52 define( 'MW_COLON_STATE_TAGSTART', 2 );
  53 define( 'MW_COLON_STATE_CLOSETAG', 3 );
  54 define( 'MW_COLON_STATE_TAGSLASH', 4 );
  55 define( 'MW_COLON_STATE_COMMENT', 5 );
  56 define( 'MW_COLON_STATE_COMMENTDASH', 6 );
  57 define( 'MW_COLON_STATE_COMMENTDASHDASH', 7 );
  58
  59 /**
  60  * PHP Parser
  61  *
  62  * Processes wiki markup
  63  *
  64  * <pre>
  65  * There are four main entry points into the Parser class:
  66  * parse()
  67  *   produces HTML output
  68  * preSaveTransform().
  69  *   produces altered wiki markup.
  70  * transformMsg()
  71  *   performs brace substitution on MediaWiki messages
  72  * preprocess()
  73  *   removes HTML comments and expands templates
  74  *
  75  * Globals used:
  76  *    objects:   $wgLang, $wgContLang
  77  *
  78  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  79  *
  80  * settings:
  81  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  82  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  83  *  $wgLocaltimezone, $wgAllowSpecialInclusion*,
  84  *  $wgMaxArticleSize*
  85  *
  86  *  * only within ParserOptions
  87  * </pre>
  88  *
  89  * @package MediaWiki
  90  */
  91 class Parser
  92 {
  93         /**#@+
  94          * @private
  95          */
  96         # Persistent:
  97         var $mTagHooks, $mFunctionHooks, $mFunctionSynonyms, $mVariables;
  98
  99         # Cleared with clearState():
 100         var $mOutput, $mAutonumber, $mDTopen, $mStripState;
 101         var $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 102         var $mInterwikiLinkHolders, $mLinkHolders, $mUniqPrefix;
 103         var $mIncludeSizes;
 104         var $mTemplates,        // cache of already loaded templates, avoids
 105                                 // multiple SQL queries for the same string
 106             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
 107                                 // in this path. Used for loop detection.
 108
 109         # Temporary
 110         # These are variables reset at least once per parse regardless of $clearState
 111         var $mOptions,      // ParserOptions object
 112                 $mTitle,        // Title context, used for self-link rendering and similar things
 113                 $mOutputType,   // Output type, one of the OT_xxx constants
 114                 $ot,            // Shortcut alias, see setOutputType()
 115                 $mRevisionId,   // ID to display in {{REVISIONID}} tags
 116                 $mRevisionTimestamp, // The timestamp of the specified revision ID
 117                 $mRevIdForTs;   // The revision ID which was used to fetch the timestamp
 118
 119         /**#@-*/
 120
 121         /**
 122          * Constructor
 123          *
 124          * @public
 125          */
 126         function Parser() {
 127                 $this->mTagHooks = array();
 128                 $this->mFunctionHooks = array();
 129                 $this->mFunctionSynonyms = array( 0 => array(), 1 => array() );
 130                 $this->mFirstCall = true;
 131         }
 132
 133         /**
 134          * Do various kinds of initialisation on the first call of the parser
 135          */
 136         function firstCallInit() {
 137                 if ( !$this->mFirstCall ) {
 138                         return;
 139                 }
 140
 141                 wfProfileIn( __METHOD__ );
 142                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
 143
 144                 $this->setHook( 'pre', array( $this, 'renderPreTag' ) );
 145
 146                 $this->setFunctionHook( 'int', array( 'CoreParserFunctions', 'intFunction' ), SFH_NO_HASH );
 147                 $this->setFunctionHook( 'ns', array( 'CoreParserFunctions', 'ns' ), SFH_NO_HASH );
 148                 $this->setFunctionHook( 'urlencode', array( 'CoreParserFunctions', 'urlencode' ), SFH_NO_HASH );
 149                 $this->setFunctionHook( 'lcfirst', array( 'CoreParserFunctions', 'lcfirst' ), SFH_NO_HASH );
 150                 $this->setFunctionHook( 'ucfirst', array( 'CoreParserFunctions', 'ucfirst' ), SFH_NO_HASH );
 151                 $this->setFunctionHook( 'lc', array( 'CoreParserFunctions', 'lc' ), SFH_NO_HASH );
 152                 $this->setFunctionHook( 'uc', array( 'CoreParserFunctions', 'uc' ), SFH_NO_HASH );
 153                 $this->setFunctionHook( 'localurl', array( 'CoreParserFunctions', 'localurl' ), SFH_NO_HASH );
 154                 $this->setFunctionHook( 'localurle', array( 'CoreParserFunctions', 'localurle' ), SFH_NO_HASH );
 155                 $this->setFunctionHook( 'fullurl', array( 'CoreParserFunctions', 'fullurl' ), SFH_NO_HASH );
 156                 $this->setFunctionHook( 'fullurle', array( 'CoreParserFunctions', 'fullurle' ), SFH_NO_HASH );
 157                 $this->setFunctionHook( 'formatnum', array( 'CoreParserFunctions', 'formatnum' ), SFH_NO_HASH );
 158                 $this->setFunctionHook( 'grammar', array( 'CoreParserFunctions', 'grammar' ), SFH_NO_HASH );
 159                 $this->setFunctionHook( 'plural', array( 'CoreParserFunctions', 'plural' ), SFH_NO_HASH );
 160                 $this->setFunctionHook( 'numberofpages', array( 'CoreParserFunctions', 'numberofpages' ), SFH_NO_HASH );
 161                 $this->setFunctionHook( 'numberofusers', array( 'CoreParserFunctions', 'numberofusers' ), SFH_NO_HASH );
 162                 $this->setFunctionHook( 'numberofarticles', array( 'CoreParserFunctions', 'numberofarticles' ), SFH_NO_HASH );
 163                 $this->setFunctionHook( 'numberoffiles', array( 'CoreParserFunctions', 'numberoffiles' ), SFH_NO_HASH );
 164                 $this->setFunctionHook( 'numberofadmins', array( 'CoreParserFunctions', 'numberofadmins' ), SFH_NO_HASH );
 165                 $this->setFunctionHook( 'language', array( 'CoreParserFunctions', 'language' ), SFH_NO_HASH );
 166                 $this->setFunctionHook( 'padleft', array( 'CoreParserFunctions', 'padleft' ), SFH_NO_HASH );
 167                 $this->setFunctionHook( 'padright', array( 'CoreParserFunctions', 'padright' ), SFH_NO_HASH );
 168                 $this->setFunctionHook( 'anchorencode', array( 'CoreParserFunctions', 'anchorencode' ), SFH_NO_HASH );
 169                 $this->setFunctionHook( 'special', array( 'CoreParserFunctions', 'special' ) );
 170
 171                 if ( $wgAllowDisplayTitle ) {
 172                         $this->setFunctionHook( 'displaytitle', array( 'CoreParserFunctions', 'displaytitle' ), SFH_NO_HASH );
 173                 }
 174                 if ( $wgAllowSlowParserFunctions ) {
 175                         $this->setFunctionHook( 'pagesinnamespace', array( 'CoreParserFunctions', 'pagesinnamespace' ), SFH_NO_HASH );
 176                 }
 177
 178                 $this->initialiseVariables();
 179                 $this->mFirstCall = false;
 180                 wfProfileOut( __METHOD__ );
 181         }
 182
 183         /**
 184          * Clear Parser state
 185          *
 186          * @private
 187          */
 188         function clearState() {
 189                 wfProfileIn( __METHOD__ );
 190                 if ( $this->mFirstCall ) {
 191                         $this->firstCallInit();
 192                 }
 193                 $this->mOutput = new ParserOutput;
 194                 $this->mAutonumber = 0;
 195                 $this->mLastSection = '';
 196                 $this->mDTopen = false;
 197                 $this->mIncludeCount = array();
 198                 $this->mStripState = new StripState;
 199                 $this->mArgStack = array();
 200                 $this->mInPre = false;
 201                 $this->mInterwikiLinkHolders = array(
 202                         'texts' => array(),
 203                         'titles' => array()
 204                 );
 205                 $this->mLinkHolders = array(
 206                         'namespaces' => array(),
 207                         'dbkeys' => array(),
 208                         'queries' => array(),
 209                         'texts' => array(),
 210                         'titles' => array()
 211                 );
 212                 $this->mRevisionTimestamp = $this->mRevisionId = null;
 213
 214                 /**
 215                  * Prefix for temporary replacement strings for the multipass parser.
 216                  * \x07 should never appear in input as it's disallowed in XML.
 217                  * Using it at the front also gives us a little extra robustness
 218                  * since it shouldn't match when butted up against identifier-like
 219                  * string constructs.
 220                  */
 221                 $this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 222
 223                 # Clear these on every parse, bug 4549
 224                 $this->mTemplates = array();
 225                 $this->mTemplatePath = array();
 226
 227                 $this->mShowToc = true;
 228                 $this->mForceTocPosition = false;
 229                 $this->mIncludeSizes = array(
 230                         'pre-expand' => 0,
 231                         'post-expand' => 0,
 232                         'arg' => 0
 233                 );
 234
 235                 wfRunHooks( 'ParserClearState', array( &$this ) );
 236                 wfProfileOut( __METHOD__ );
 237         }
 238
 239         function setOutputType( $ot ) {
 240                 $this->mOutputType = $ot;
 241                 // Shortcut alias
 242                 $this->ot = array(
 243                         'html' => $ot == OT_HTML,
 244                         'wiki' => $ot == OT_WIKI,
 245                         'msg' => $ot == OT_MSG,
 246                         'pre' => $ot == OT_PREPROCESS,
 247                 );
 248         }
 249
 250         /**
 251          * Accessor for mUniqPrefix.
 252          *
 253          * @public
 254          */
 255         function uniqPrefix() {
 256                 return $this->mUniqPrefix;
 257         }
 258
 259         /**
 260          * Convert wikitext to HTML
 261          * Do not call this function recursively.
 262          *
 263          * @private
 264          * @param string $text Text we want to parse
 265          * @param Title &$title A title object
 266          * @param array $options
 267          * @param boolean $linestart
 268          * @param boolean $clearState
 269          * @param int $revid number to pass in {{REVISIONID}}
 270          * @return ParserOutput a ParserOutput
 271          */
 272         function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 273                 /**
 274                  * First pass--just handle <nowiki> sections, pass the rest off
 275                  * to internalParse() which does all the real work.
 276                  */
 277
 278                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 279                 $fname = 'Parser::parse-' . wfGetCaller();
 280                 wfProfileIn( __METHOD__ );
 281                 wfProfileIn( $fname );
 282
 283                 if ( $clearState ) {
 284                         $this->clearState();
 285                 }
 286
 287                 $this->mOptions = $options;
 288                 $this->mTitle =& $title;
 289                 $oldRevisionId = $this->mRevisionId;
 290                 $oldRevisionTimestamp = $this->mRevisionTimestamp;
 291                 if( $revid !== null ) {
 292                         $this->mRevisionId = $revid;
 293                         $this->mRevisionTimestamp = null;
 294                 }
 295                 $this->setOutputType( OT_HTML );
 296                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 297                 $text = $this->strip( $text, $this->mStripState );
 298                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 299                 $text = $this->internalParse( $text );
 300                 $text = $this->mStripState->unstripGeneral( $text );
 301
 302                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 303                 $fixtags = array(
 304                         # french spaces, last one Guillemet-left
 305                         # only if there is something before the space
 306                         '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 307                         # french spaces, Guillemet-right
 308                         '/(\\302\\253) /' => '\\1&nbsp;',
 309                 );
 310                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 311
 312                 # only once and last
 313                 $text = $this->doBlockLevels( $text, $linestart );
 314
 315                 $this->replaceLinkHolders( $text );
 316
 317                 # the position of the parserConvert() call should not be changed. it
 318                 # assumes that the links are all replaced and the only thing left
 319                 # is the <nowiki> mark.
 320                 # Side-effects: this calls $this->mOutput->setTitleText()
 321                 $text = $wgContLang->parserConvert( $text, $this );
 322
 323                 $text = $this->mStripState->unstripNoWiki( $text );
 324
 325                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 326
 327                 $text = Sanitizer::normalizeCharReferences( $text );
 328
 329                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 330                         $text = Parser::tidy($text);
 331                 } else {
 332                         # attempt to sanitize at least some nesting problems
 333                         # (bug #2702 and quite a few others)
 334                         $tidyregs = array(
 335                                 # ''Something [http://www.cool.com cool''] -->
 336                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 337                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 338                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 339                                 # fix up an anchor inside another anchor, only
 340                                 # at least for a single single nested link (bug 3695)
 341                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 342                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 343                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 344                                 # contains a div, so fix it up here; replace
 345                                 # div with escaped text
 346                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 347                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 348                                 # remove empty italic or bold tag pairs, some
 349                                 # introduced by rules above
 350                                 '/<([bi])><\/\\1>/' => '',
 351                         );
 352
 353                         $text = preg_replace(
 354                                 array_keys( $tidyregs ),
 355                                 array_values( $tidyregs ),
 356                                 $text );
 357                 }
 358
 359                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 360
 361                 # Information on include size limits, for the benefit of users who try to skirt them
 362                 if ( max( $this->mIncludeSizes ) > 1000 ) {
 363                         $max = $this->mOptions->getMaxIncludeSize();
 364                         $text .= "<!-- \n" .
 365                                 "Pre-expand include size: {$this->mIncludeSizes['pre-expand']} bytes\n" .
 366                                 "Post-expand include size: {$this->mIncludeSizes['post-expand']} bytes\n" .
 367                                 "Template argument size: {$this->mIncludeSizes['arg']} bytes\n" .
 368                                 "Maximum: $max bytes\n" .
 369                                 "-->\n";
 370                 }
 371                 $this->mOutput->setText( $text );
 372                 $this->mRevisionId = $oldRevisionId;
 373                 $this->mRevisionTimestamp = $oldRevisionTimestamp;
 374                 wfProfileOut( $fname );
 375                 wfProfileOut( __METHOD__ );
 376
 377                 return $this->mOutput;
 378         }
 379
 380         /**
 381          * Recursive parser entry point that can be called from an extension tag
 382          * hook.
 383          */
 384         function recursiveTagParse( $text ) {
 385                 wfProfileIn( __METHOD__ );
 386                 $x =& $this->mStripState;
 387                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 388                 $text = $this->strip( $text, $x );
 389                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 390                 $text = $this->internalParse( $text );
 391                 wfProfileOut( __METHOD__ );
 392                 return $text;
 393         }
 394
 395         /**
 396          * Expand templates and variables in the text, producing valid, static wikitext.
 397          * Also removes comments.
 398          */
 399         function preprocess( $text, $title, $options ) {
 400                 wfProfileIn( __METHOD__ );
 401                 $this->clearState();
 402                 $this->setOutputType( OT_PREPROCESS );
 403                 $this->mOptions = $options;
 404                 $this->mTitle = $title;
 405                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$this->mStripState ) );
 406                 $text = $this->strip( $text, $this->mStripState );
 407                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$this->mStripState ) );
 408                 if ( $this->mOptions->getRemoveComments() ) {
 409                         $text = Sanitizer::removeHTMLcomments( $text );
 410                 }
 411                 $text = $this->replaceVariables( $text );
 412                 $text = $this->mStripState->unstripBoth( $text );
 413                 wfProfileOut( __METHOD__ );
 414                 return $text;
 415         }
 416
 417         /**
 418          * Get a random string
 419          *
 420          * @private
 421          * @static
 422          */
 423         function getRandomString() {
 424                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 425         }
 426
 427         function &getTitle() { return $this->mTitle; }
 428         function getOptions() { return $this->mOptions; }
 429
 430         function getFunctionLang() {
 431                 global $wgLang, $wgContLang;
 432                 return $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
 433         }
 434
 435         /**
 436          * Replaces all occurrences of HTML-style comments and the given tags
 437          * in the text with a random marker and returns teh next text. The output
 438          * parameter $matches will be an associative array filled with data in
 439          * the form:
 440          *   'UNIQ-xxxxx' => array(
 441          *     'element',
 442          *     'tag content',
 443          *     array( 'param' => 'x' ),
 444          *     '<element param="x">tag content</element>' ) )
 445          *
 446          * @param $elements list of element names. Comments are always extracted.
 447          * @param $text Source text string.
 448          * @param $uniq_prefix
 449          *
 450          * @private
 451          * @static
 452          */
 453         function extractTagsAndParams($elements, $text, &$matches, $uniq_prefix = ''){
 454                 static $n = 1;
 455                 $stripped = '';
 456                 $matches = array();
 457
 458                 $taglist = implode( '|', $elements );
 459                 $start = "/<($taglist)(\\s+[^>]*?|\\s*?)(\/?>)|<(!--)/i";
 460
 461                 while ( '' != $text ) {
 462                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 463                         $stripped .= $p[0];
 464                         if( count( $p ) < 5 ) {
 465                                 break;
 466                         }
 467                         if( count( $p ) > 5 ) {
 468                                 // comment
 469                                 $element    = $p[4];
 470                                 $attributes = '';
 471                                 $close      = '';
 472                                 $inside     = $p[5];
 473                         } else {
 474                                 // tag
 475                                 $element    = $p[1];
 476                                 $attributes = $p[2];
 477                                 $close      = $p[3];
 478                                 $inside     = $p[4];
 479                         }
 480
 481                         $marker = "$uniq_prefix-$element-" . sprintf('%08X', $n++) . '-QINU';
 482                         $stripped .= $marker;
 483
 484                         if ( $close === '/>' ) {
 485                                 // Empty element tag, <tag />
 486                                 $content = null;
 487                                 $text = $inside;
 488                                 $tail = null;
 489                         } else {
 490                                 if( $element == '!--' ) {
 491                                         $end = '/(-->)/';
 492                                 } else {
 493                                         $end = "/(<\\/$element\\s*>)/i";
 494                                 }
 495                                 $q = preg_split( $end, $inside, 2, PREG_SPLIT_DELIM_CAPTURE );
 496                                 $content = $q[0];
 497                                 if( count( $q ) < 3 ) {
 498                                         # No end tag -- let it run out to the end of the text.
 499                                         $tail = '';
 500                                         $text = '';
 501                                 } else {
 502                                         $tail = $q[1];
 503                                         $text = $q[2];
 504                                 }
 505                         }
 506
 507                         $matches[$marker] = array( $element,
 508                                 $content,
 509                                 Sanitizer::decodeTagAttributes( $attributes ),
 510                                 "<$element$attributes$close$content$tail" );
 511                 }
 512                 return $stripped;
 513         }
 514
 515         /**
 516          * Strips and renders nowiki, pre, math, hiero
 517          * If $render is set, performs necessary rendering operations on plugins
 518          * Returns the text, and fills an array with data needed in unstrip()
 519          *
 520          * @param StripState $state
 521          *
 522          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 523          *  will be stripped in addition to other tags. This is important
 524          *  for section editing, where these comments cause confusion when
 525          *  counting the sections in the wikisource
 526          *
 527          * @param array dontstrip contains tags which should not be stripped;
 528          *  used to prevent stipping of <gallery> when saving (fixes bug 2700)
 529          *
 530          * @private
 531          */
 532         function strip( $text, $state, $stripcomments = false , $dontstrip = array () ) {
 533                 wfProfileIn( __METHOD__ );
 534                 $render = ($this->mOutputType == OT_HTML);
 535
 536                 $uniq_prefix = $this->mUniqPrefix;
 537                 $commentState = new ReplacementArray;
 538
 539                 $elements = array_merge(
 540                         array( 'nowiki', 'gallery' ),
 541                         array_keys( $this->mTagHooks ) );
 542                 global $wgRawHtml;
 543                 if( $wgRawHtml ) {
 544                         $elements[] = 'html';
 545                 }
 546                 if( $this->mOptions->getUseTeX() ) {
 547                         $elements[] = 'math';
 548                 }
 549
 550                 # Removing $dontstrip tags from $elements list (currently only 'gallery', fixing bug 2700)
 551                 foreach ( $elements AS $k => $v ) {
 552                         if ( !in_array ( $v , $dontstrip ) ) continue;
 553                         unset ( $elements[$k] );
 554                 }
 555
 556                 $matches = array();
 557                 $text = Parser::extractTagsAndParams( $elements, $text, $matches, $uniq_prefix );
 558
 559                 foreach( $matches as $marker => $data ) {
 560                         list( $element, $content, $params, $tag ) = $data;
 561                         if( $render ) {
 562                                 $tagName = strtolower( $element );
 563                                 wfProfileIn( __METHOD__."-render-$tagName" );
 564                                 switch( $tagName ) {
 565                                 case '!--':
 566                                         // Comment
 567                                         if( substr( $tag, -3 ) == '-->' ) {
 568                                                 $output = $tag;
 569                                         } else {
 570                                                 // Unclosed comment in input.
 571                                                 // Close it so later stripping can remove it
 572                                                 $output = "$tag-->";
 573                                         }
 574                                         break;
 575                                 case 'html':
 576                                         if( $wgRawHtml ) {
 577                                                 $output = $content;
 578                                                 break;
 579                                         }
 580                                         // Shouldn't happen otherwise. :)
 581                                 case 'nowiki':
 582                                         $output = Xml::escapeTagsOnly( $content );
 583                                         break;
 584                                 case 'math':
 585                                         $output = MathRenderer::renderMath( $content );
 586                                         break;
 587                                 case 'gallery':
 588                                         $output = $this->renderImageGallery( $content, $params );
 589                                         break;
 590                                 default:
 591                                         if( isset( $this->mTagHooks[$tagName] ) ) {
 592                                                 $output = call_user_func_array( $this->mTagHooks[$tagName],
 593                                                         array( $content, $params, $this ) );
 594                                         } else {
 595                                                 throw new MWException( "Invalid call hook $element" );
 596                                         }
 597                                 }
 598                                 wfProfileOut( __METHOD__."-render-$tagName" );
 599                         } else {
 600                                 // Just stripping tags; keep the source
 601                                 $output = $tag;
 602                         }
 603
 604                         // Unstrip the output, because unstrip() is no longer recursive so
 605                         // it won't do it itself
 606                         $output = $state->unstripBoth( $output );
 607
 608                         if( !$stripcomments && $element == '!--' ) {
 609                                 $commentState->setPair( $marker, $output );
 610                         } elseif ( $element == 'html' || $element == 'nowiki' ) {
 611                                 $state->nowiki->setPair( $marker, $output );
 612                         } else {
 613                                 $state->general->setPair( $marker, $output );
 614                         }
 615                 }
 616
 617                 # Unstrip comments unless explicitly told otherwise.
 618                 # (The comments are always stripped prior to this point, so as to
 619                 # not invoke any extension tags / parser hooks contained within
 620                 # a comment.)
 621                 if ( !$stripcomments ) {
 622                         // Put them all back and forget them
 623                         $text = $commentState->replace( $text );
 624                 }
 625
 626                 wfProfileOut( __METHOD__ );
 627                 return $text;
 628         }
 629
 630         /**
 631          * Restores pre, math, and other extensions removed by strip()
 632          *
 633          * always call unstripNoWiki() after this one
 634          * @private
 635          * @deprecated use $this->mStripState->unstrip()
 636          */
 637         function unstrip( $text, $state ) {
 638                 return $state->unstripGeneral( $text );
 639         }
 640
 641         /**
 642          * Always call this after unstrip() to preserve the order
 643          *
 644          * @private
 645          * @deprecated use $this->mStripState->unstrip()
 646          */
 647         function unstripNoWiki( $text, $state ) {
 648                 return $state->unstripNoWiki( $text );
 649         }
 650
 651         /**
 652          * @deprecated use $this->mStripState->unstripBoth()
 653          */
 654         function unstripForHTML( $text ) {
 655                 return $this->mStripState->unstripBoth( $text );
 656         }
 657
 658         /**
 659          * Add an item to the strip state
 660          * Returns the unique tag which must be inserted into the stripped text
 661          * The tag will be replaced with the original text in unstrip()
 662          *
 663          * @private
 664          */
 665         function insertStripItem( $text, &$state ) {
 666                 $rnd = $this->mUniqPrefix . '-item' . Parser::getRandomString();
 667                 $state->general->setPair( $rnd, $text );
 668                 return $rnd;
 669         }
 670
 671         /**
 672          * Interface with html tidy, used if $wgUseTidy = true.
 673          * If tidy isn't able to correct the markup, the original will be
 674          * returned in all its glory with a warning comment appended.
 675          *
 676          * Either the external tidy program or the in-process tidy extension
 677          * will be used depending on availability. Override the default
 678          * $wgTidyInternal setting to disable the internal if it's not working.
 679          *
 680          * @param string $text Hideous HTML input
 681          * @return string Corrected HTML output
 682          * @public
 683          * @static
 684          */
 685         function tidy( $text ) {
 686                 global $wgTidyInternal;
 687                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 688 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 689 '<head><title>test</title></head><body>'.$text.'</body></html>';
 690                 if( $wgTidyInternal ) {
 691                         $correctedtext = Parser::internalTidy( $wrappedtext );
 692                 } else {
 693                         $correctedtext = Parser::externalTidy( $wrappedtext );
 694                 }
 695                 if( is_null( $correctedtext ) ) {
 696                         wfDebug( "Tidy error detected!\n" );
 697                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 698                 }
 699                 return $correctedtext;
 700         }
 701
 702         /**
 703          * Spawn an external HTML tidy process and get corrected markup back from it.
 704          *
 705          * @private
 706          * @static
 707          */
 708         function externalTidy( $text ) {
 709                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 710                 $fname = 'Parser::externalTidy';
 711                 wfProfileIn( $fname );
 712
 713                 $cleansource = '';
 714                 $opts = ' -utf8';
 715
 716                 $descriptorspec = array(
 717                         0 => array('pipe', 'r'),
 718                         1 => array('pipe', 'w'),
 719                         2 => array('file', '/dev/null', 'a')
 720                 );
 721                 $pipes = array();
 722                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 723                 if (is_resource($process)) {
 724                         // Theoretically, this style of communication could cause a deadlock
 725                         // here. If the stdout buffer fills up, then writes to stdin could
 726                         // block. This doesn't appear to happen with tidy, because tidy only
 727                         // writes to stdout after it's finished reading from stdin. Search
 728                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 729                         fwrite($pipes[0], $text);
 730                         fclose($pipes[0]);
 731                         while (!feof($pipes[1])) {
 732                                 $cleansource .= fgets($pipes[1], 1024);
 733                         }
 734                         fclose($pipes[1]);
 735                         proc_close($process);
 736                 }
 737
 738                 wfProfileOut( $fname );
 739
 740                 if( $cleansource == '' && $text != '') {
 741                         // Some kind of error happened, so we couldn't get the corrected text.
 742                         // Just give up; we'll use the source text and append a warning.
 743                         return null;
 744                 } else {
 745                         return $cleansource;
 746                 }
 747         }
 748
 749         /**
 750          * Use the HTML tidy PECL extension to use the tidy library in-process,
 751          * saving the overhead of spawning a new process. Currently written to
 752          * the PHP 4.3.x version of the extension, may not work on PHP 5.
 753          *
 754          * 'pear install tidy' should be able to compile the extension module.
 755          *
 756          * @private
 757          * @static
 758          */
 759         function internalTidy( $text ) {
 760                 global $wgTidyConf;
 761                 $fname = 'Parser::internalTidy';
 762                 wfProfileIn( $fname );
 763
 764                 tidy_load_config( $wgTidyConf );
 765                 tidy_set_encoding( 'utf8' );
 766                 tidy_parse_string( $text );
 767                 tidy_clean_repair();
 768                 if( tidy_get_status() == 2 ) {
 769                         // 2 is magic number for fatal error
 770                         // http://www.php.net/manual/en/function.tidy-get-status.php
 771                         $cleansource = null;
 772                 } else {
 773                         $cleansource = tidy_get_output();
 774                 }
 775                 wfProfileOut( $fname );
 776                 return $cleansource;
 777         }
 778
 779         /**
 780          * parse the wiki syntax used to render tables
 781          *
 782          * @private
 783          */
 784         function doTableStuff ( $t ) {
 785                 $fname = 'Parser::doTableStuff';
 786                 wfProfileIn( $fname );
 787
 788                 $t = explode ( "\n" , $t ) ;
 789                 $td = array () ; # Is currently a td tag open?
 790                 $ltd = array () ; # Was it TD or TH?
 791                 $tr = array () ; # Is currently a tr tag open?
 792                 $ltr = array () ; # tr attributes
 793                 $has_opened_tr = array(); # Did this table open a <tr> element?
 794                 $indent_level = 0; # indent level of the table
 795                 foreach ( $t AS $k => $x )
 796                 {
 797                         $x = trim ( $x ) ;
 798                         $fc = substr ( $x , 0 , 1 ) ;
 799                         $matches = array();
 800                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 801                                 $indent_level = strlen( $matches[1] );
 802
 803                                 $attributes = $this->mStripState->unstripBoth( $matches[2] );
 804
 805                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 806                                         '<table' . Sanitizer::fixTagAttributes ( $attributes, 'table' ) . '>' ;
 807                                 array_push ( $td , false ) ;
 808                                 array_push ( $ltd , '' ) ;
 809                                 array_push ( $tr , false ) ;
 810                                 array_push ( $ltr , '' ) ;
 811                                 array_push ( $has_opened_tr, false );
 812                         }
 813                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 814                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 815                                 $z = "</table>" . substr ( $x , 2);
 816                                 $l = array_pop ( $ltd ) ;
 817                                 if ( !array_pop ( $has_opened_tr ) ) $z = "<tr><td></td></tr>" . $z ;
 818                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 819                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 820                                 array_pop ( $ltr ) ;
 821                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 822                         }
 823                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 824                                 $x = substr ( $x , 1 ) ;
 825                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 826                                 $z = '' ;
 827                                 $l = array_pop ( $ltd ) ;
 828                                 array_pop ( $has_opened_tr );
 829                                 array_push ( $has_opened_tr , true ) ;
 830                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 831                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 832                                 array_pop ( $ltr ) ;
 833                                 $t[$k] = $z ;
 834                                 array_push ( $tr , false ) ;
 835                                 array_push ( $td , false ) ;
 836                                 array_push ( $ltd , '' ) ;
 837                                 $attributes = $this->mStripState->unstripBoth( $x );
 838                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $attributes, 'tr' ) ) ;
 839                         }
 840                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 841                                 # $x is a table row
 842                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 843                                         $fc = '+' ;
 844                                         $x = substr ( $x , 1 ) ;
 845                                 }
 846                                 $after = substr ( $x , 1 ) ;
 847                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 848
 849                                 // Split up multiple cells on the same line.
 850                                 // FIXME: This can result in improper nesting of tags processed
 851                                 // by earlier parser steps, but should avoid splitting up eg
 852                                 // attribute values containing literal "||".
 853                                 $after = StringUtils::explodeMarkup( '||', $after );
 854
 855                                 $t[$k] = '' ;
 856
 857                                 # Loop through each table cell
 858                                 foreach ( $after AS $theline )
 859                                 {
 860                                         $z = '' ;
 861                                         if ( $fc != '+' )
 862                                         {
 863                                                 $tra = array_pop ( $ltr ) ;
 864                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 865                                                 array_push ( $tr , true ) ;
 866                                                 array_push ( $ltr , '' ) ;
 867                                                 array_pop ( $has_opened_tr );
 868                                                 array_push ( $has_opened_tr , true ) ;
 869                                         }
 870
 871                                         $l = array_pop ( $ltd ) ;
 872                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 873                                         if ( $fc == '|' ) {
 874                                             $l = 'td' ;
 875                                         } else if ( $fc == '!' ) {
 876                                             $l = 'th' ;
 877                                         } else if ( $fc == '+' ) {
 878                                             $l = 'caption' ;
 879                                         } else {
 880                                             $l = '' ;
 881                                         }
 882                                         array_push ( $ltd , $l ) ;
 883
 884                                         # Cell parameters
 885                                         $y = explode ( '|' , $theline , 2 ) ;
 886                                         # Note that a '|' inside an invalid link should not
 887                                         # be mistaken as delimiting cell parameters
 888                                         if ( strpos( $y[0], '[[' ) !== false ) {
 889                                                 $y = array ($theline);
 890                                         }
 891                                         if ( count ( $y ) == 1 )
 892                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 893                                         else {
 894                                                 $attributes = $this->mStripState->unstripBoth( $y[0] );
 895                                                 $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($attributes, $l).">{$y[1]}" ;
 896                                         }
 897                                         $t[$k] .= $y ;
 898                                         array_push ( $td , true ) ;
 899                                 }
 900                         }
 901                 }
 902
 903                 # Closing open td, tr && table
 904                 while ( count ( $td ) > 0 )
 905                 {
 906                         $l = array_pop ( $ltd ) ;
 907                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 908                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 909                         if ( !array_pop ( $has_opened_tr ) ) $t[] = "<tr><td></td></tr>" ;
 910                         $t[] = '</table>' ;
 911                 }
 912
 913                 $t = implode ( "\n" , $t ) ;
 914                 # special case: don't return empty table
 915                 if($t == "<table>\n<tr><td></td></tr>\n</table>")
 916                         $t = '';
 917                 wfProfileOut( $fname );
 918                 return $t ;
 919         }
 920
 921         /**
 922          * Helper function for parse() that transforms wiki markup into
 923          * HTML. Only called for $mOutputType == OT_HTML.
 924          *
 925          * @private
 926          */
 927         function internalParse( $text ) {
 928                 $args = array();
 929                 $isMain = true;
 930                 $fname = 'Parser::internalParse';
 931                 wfProfileIn( $fname );
 932
 933                 # Hook to suspend the parser in this state
 934                 $x =& $this->mStripState; // FIXME: Please check that this initialization is correct.
 935                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$x ) ) ) {
 936                         wfProfileOut( $fname );
 937                         return $text ;
 938                 }
 939
 940                 # Remove <noinclude> tags and <includeonly> sections
 941                 $text = strtr( $text, array( '<onlyinclude>' => '' , '</onlyinclude>' => '' ) );
 942                 $text = strtr( $text, array( '<noinclude>' => '', '</noinclude>' => '') );
 943                 $text = StringUtils::delimiterReplace( '<includeonly>', '</includeonly>', '', $text );
 944
 945                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ) );
 946
 947                 $text = $this->replaceVariables( $text, $args );
 948
 949                 // Tables need to come after variable replacement for things to work
 950                 // properly; putting them before other transformations should keep
 951                 // exciting things like link expansions from showing up in surprising
 952                 // places.
 953                 $text = $this->doTableStuff( $text );
 954
 955                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 956
 957                 $text = $this->stripToc( $text );
 958                 $this->stripNoGallery( $text );
 959                 $text = $this->doHeadings( $text );
 960                 if($this->mOptions->getUseDynamicDates()) {
 961                         $df =& DateFormatter::getInstance();
 962                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 963                 }
 964                 $text = $this->doAllQuotes( $text );
 965                 $text = $this->replaceInternalLinks( $text );
 966                 $text = $this->replaceExternalLinks( $text );
 967
 968                 # replaceInternalLinks may sometimes leave behind
 969                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 970                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 971
 972                 $text = $this->doMagicLinks( $text );
 973                 $text = $this->formatHeadings( $text, $isMain );
 974
 975                 wfProfileOut( $fname );
 976                 return $text;
 977         }
 978
 979         /**
 980          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 981          * magic external links.
 982          *
 983          * @private
 984          */
 985         function &doMagicLinks( &$text ) {
 986                 wfProfileIn( __METHOD__ );
 987                 $text = preg_replace_callback(
 988                         '!(?:                           # Start cases
 989                             <a.*?</a> |                 # Skip link text
 990                             <.*?> |                     # Skip stuff inside HTML elements
 991                             (?:RFC|PMID)\s+([0-9]+) |   # RFC or PMID, capture number as m[1]
 992                             ISBN\s+([0-9Xx-]+)          # ISBN, capture number as m[2]
 993                         )!x', array( &$this, 'magicLinkCallback' ), $text );
 994                 wfProfileOut( __METHOD__ );
 995                 return $text;
 996         }
 997
 998         function magicLinkCallback( $m ) {
 999                 if ( substr( $m[0], 0, 1 ) == '<' ) {
1000                         # Skip HTML element
1001                         return $m[0];
1002                 } elseif ( substr( $m[0], 0, 4 ) == 'ISBN' ) {
1003                         $isbn = $m[2];
1004                         $num = strtr( $isbn, array(
1005                                 '-' => '',
1006                                 ' ' => '',
1007                                 'x' => 'X',
1008                         ));
1009                         $titleObj = SpecialPage::getTitleFor( 'Booksources' );
1010                         $text = '<a href="' .
1011                                 $titleObj->escapeLocalUrl( "isbn=$num" ) .
1012                                 "\" class=\"internal\">ISBN $isbn</a>";
1013                 } else {
1014                         if ( substr( $m[0], 0, 3 ) == 'RFC' ) {
1015                                 $keyword = 'RFC';
1016                                 $urlmsg = 'rfcurl';
1017                                 $id = $m[1];
1018                         } elseif ( substr( $m[0], 0, 4 ) == 'PMID' ) {
1019                                 $keyword = 'PMID';
1020                                 $urlmsg = 'pubmedurl';
1021                                 $id = $m[1];
1022                         } else {
1023                                 throw new MWException( __METHOD__.': unrecognised match type "' .
1024                                         substr($m[0], 0, 20 ) . '"' );
1025                         }
1026
1027                         $url = wfMsg( $urlmsg, $id);
1028                         $sk =& $this->mOptions->getSkin();
1029                         $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
1030                         $text = "<a href=\"{$url}\"{$la}>{$keyword} {$id}</a>";
1031                 }
1032                 return $text;
1033         }
1034
1035         /**
1036          * Parse headers and return html
1037          *
1038          * @private
1039          */
1040         function doHeadings( $text ) {
1041                 $fname = 'Parser::doHeadings';
1042                 wfProfileIn( $fname );
1043                 for ( $i = 6; $i >= 1; --$i ) {
1044                         $h = str_repeat( '=', $i );
1045                         $text = preg_replace( "/^{$h}(.+){$h}\\s*$/m",
1046                           "<h{$i}>\\1</h{$i}>\\2", $text );
1047                 }
1048                 wfProfileOut( $fname );
1049                 return $text;
1050         }
1051
1052         /**
1053          * Replace single quotes with HTML markup
1054          * @private
1055          * @return string the altered text
1056          */
1057         function doAllQuotes( $text ) {
1058                 $fname = 'Parser::doAllQuotes';
1059                 wfProfileIn( $fname );
1060                 $outtext = '';
1061                 $lines = explode( "\n", $text );
1062                 foreach ( $lines as $line ) {
1063                         $outtext .= $this->doQuotes ( $line ) . "\n";
1064                 }
1065                 $outtext = substr($outtext, 0,-1);
1066                 wfProfileOut( $fname );
1067                 return $outtext;
1068         }
1069
1070         /**
1071          * Helper function for doAllQuotes()
1072          * @private
1073          */
1074         function doQuotes( $text ) {
1075                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1076                 if ( count( $arr ) == 1 )
1077                         return $text;
1078                 else
1079                 {
1080                         # First, do some preliminary work. This may shift some apostrophes from
1081                         # being mark-up to being text. It also counts the number of occurrences
1082                         # of bold and italics mark-ups.
1083                         $i = 0;
1084                         $numbold = 0;
1085                         $numitalics = 0;
1086                         foreach ( $arr as $r )
1087                         {
1088                                 if ( ( $i % 2 ) == 1 )
1089                                 {
1090                                         # If there are ever four apostrophes, assume the first is supposed to
1091                                         # be text, and the remaining three constitute mark-up for bold text.
1092                                         if ( strlen( $arr[$i] ) == 4 )
1093                                         {
1094                                                 $arr[$i-1] .= "'";
1095                                                 $arr[$i] = "'''";
1096                                         }
1097                                         # If there are more than 5 apostrophes in a row, assume they're all
1098                                         # text except for the last 5.
1099                                         else if ( strlen( $arr[$i] ) > 5 )
1100                                         {
1101                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
1102                                                 $arr[$i] = "'''''";
1103                                         }
1104                                         # Count the number of occurrences of bold and italics mark-ups.
1105                                         # We are not counting sequences of five apostrophes.
1106                                         if ( strlen( $arr[$i] ) == 2 )      { $numitalics++;             }
1107                                         else if ( strlen( $arr[$i] ) == 3 ) { $numbold++;                }
1108                                         else if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
1109                                 }
1110                                 $i++;
1111                         }
1112
1113                         # If there is an odd number of both bold and italics, it is likely
1114                         # that one of the bold ones was meant to be an apostrophe followed
1115                         # by italics. Which one we cannot know for certain, but it is more
1116                         # likely to be one that has a single-letter word before it.
1117                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
1118                         {
1119                                 $i = 0;
1120                                 $firstsingleletterword = -1;
1121                                 $firstmultiletterword = -1;
1122                                 $firstspace = -1;
1123                                 foreach ( $arr as $r )
1124                                 {
1125                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1126                                         {
1127                                                 $x1 = substr ($arr[$i-1], -1);
1128                                                 $x2 = substr ($arr[$i-1], -2, 1);
1129                                                 if ($x1 == ' ') {
1130                                                         if ($firstspace == -1) $firstspace = $i;
1131                                                 } else if ($x2 == ' ') {
1132                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1133                                                 } else {
1134                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1135                                                 }
1136                                         }
1137                                         $i++;
1138                                 }
1139
1140                                 # If there is a single-letter word, use it!
1141                                 if ($firstsingleletterword > -1)
1142                                 {
1143                                         $arr [ $firstsingleletterword ] = "''";
1144                                         $arr [ $firstsingleletterword-1 ] .= "'";
1145                                 }
1146                                 # If not, but there's a multi-letter word, use that one.
1147                                 else if ($firstmultiletterword > -1)
1148                                 {
1149                                         $arr [ $firstmultiletterword ] = "''";
1150                                         $arr [ $firstmultiletterword-1 ] .= "'";
1151                                 }
1152                                 # ... otherwise use the first one that has neither.
1153                                 # (notice that it is possible for all three to be -1 if, for example,
1154                                 # there is only one pentuple-apostrophe in the line)
1155                                 else if ($firstspace > -1)
1156                                 {
1157                                         $arr [ $firstspace ] = "''";
1158                                         $arr [ $firstspace-1 ] .= "'";
1159                                 }
1160                         }
1161
1162                         # Now let's actually convert our apostrophic mush to HTML!
1163                         $output = '';
1164                         $buffer = '';
1165                         $state = '';
1166                         $i = 0;
1167                         foreach ($arr as $r)
1168                         {
1169                                 if (($i % 2) == 0)
1170                                 {
1171                                         if ($state == 'both')
1172                                                 $buffer .= $r;
1173                                         else
1174                                                 $output .= $r;
1175                                 }
1176                                 else
1177                                 {
1178                                         if (strlen ($r) == 2)
1179                                         {
1180                                                 if ($state == 'i')
1181                                                 { $output .= '</i>'; $state = ''; }
1182                                                 else if ($state == 'bi')
1183                                                 { $output .= '</i>'; $state = 'b'; }
1184                                                 else if ($state == 'ib')
1185                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1186                                                 else if ($state == 'both')
1187                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1188                                                 else # $state can be 'b' or ''
1189                                                 { $output .= '<i>'; $state .= 'i'; }
1190                                         }
1191                                         else if (strlen ($r) == 3)
1192                                         {
1193                                                 if ($state == 'b')
1194                                                 { $output .= '</b>'; $state = ''; }
1195                                                 else if ($state == 'bi')
1196                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1197                                                 else if ($state == 'ib')
1198                                                 { $output .= '</b>'; $state = 'i'; }
1199                                                 else if ($state == 'both')
1200                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1201                                                 else # $state can be 'i' or ''
1202                                                 { $output .= '<b>'; $state .= 'b'; }
1203                                         }
1204                                         else if (strlen ($r) == 5)
1205                                         {
1206                                                 if ($state == 'b')
1207                                                 { $output .= '</b><i>'; $state = 'i'; }
1208                                                 else if ($state == 'i')
1209                                                 { $output .= '</i><b>'; $state = 'b'; }
1210                                                 else if ($state == 'bi')
1211                                                 { $output .= '</i></b>'; $state = ''; }
1212                                                 else if ($state == 'ib')
1213                                                 { $output .= '</b></i>'; $state = ''; }
1214                                                 else if ($state == 'both')
1215                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1216                                                 else # ($state == '')
1217                                                 { $buffer = ''; $state = 'both'; }
1218                                         }
1219                                 }
1220                                 $i++;
1221                         }
1222                         # Now close all remaining tags.  Notice that the order is important.
1223                         if ($state == 'b' || $state == 'ib')
1224                                 $output .= '</b>';
1225                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1226                                 $output .= '</i>';
1227                         if ($state == 'bi')
1228                                 $output .= '</b>';
1229                         if ($state == 'both')
1230                                 $output .= '<b><i>'.$buffer.'</i></b>';
1231                         return $output;
1232                 }
1233         }
1234
1235         /**
1236          * Replace external links
1237          *
1238          * Note: this is all very hackish and the order of execution matters a lot.
1239          * Make sure to run maintenance/parserTests.php if you change this code.
1240          *
1241          * @private
1242          */
1243         function replaceExternalLinks( $text ) {
1244                 global $wgContLang;
1245                 $fname = 'Parser::replaceExternalLinks';
1246                 wfProfileIn( $fname );
1247
1248                 $sk =& $this->mOptions->getSkin();
1249
1250                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1251
1252                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1253
1254                 $i = 0;
1255                 while ( $i<count( $bits ) ) {
1256                         $url = $bits[$i++];
1257                         $protocol = $bits[$i++];
1258                         $text = $bits[$i++];
1259                         $trail = $bits[$i++];
1260
1261                         # The characters '<' and '>' (which were escaped by
1262                         # removeHTMLtags()) should not be included in
1263                         # URLs, per RFC 2396.
1264                         $m2 = array();
1265                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1266                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1267                                 $url = substr($url, 0, $m2[0][1]);
1268                         }
1269
1270                         # If the link text is an image URL, replace it with an <img> tag
1271                         # This happened by accident in the original parser, but some people used it extensively
1272                         $img = $this->maybeMakeExternalImage( $text );
1273                         if ( $img !== false ) {
1274                                 $text = $img;
1275                         }
1276
1277                         $dtrail = '';
1278
1279                         # Set linktype for CSS - if URL==text, link is essentially free
1280                         $linktype = ($text == $url) ? 'free' : 'text';
1281
1282                         # No link text, e.g. [http://domain.tld/some.link]
1283                         if ( $text == '' ) {
1284                                 # Autonumber if allowed. See bug #5918
1285                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1286                                         $text = '[' . ++$this->mAutonumber . ']';
1287                                         $linktype = 'autonumber';
1288                                 } else {
1289                                         # Otherwise just use the URL
1290                                         $text = htmlspecialchars( $url );
1291                                         $linktype = 'free';
1292                                 }
1293                         } else {
1294                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1295                                 # Check for trail
1296                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1297                         }
1298
1299                         $text = $wgContLang->markNoConversion($text);
1300
1301                         $url = Sanitizer::cleanUrl( $url );
1302
1303                         # Process the trail (i.e. everything after this link up until start of the next link),
1304                         # replacing any non-bracketed links
1305                         $trail = $this->replaceFreeExternalLinks( $trail );
1306
1307                         # Use the encoded URL
1308                         # This means that users can paste URLs directly into the text
1309                         # Funny characters like &ouml; aren't valid in URLs anyway
1310                         # This was changed in August 2004
1311                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1312
1313                         # Register link in the output object.
1314                         # Replace unnecessary URL escape codes with the referenced character
1315                         # This prevents spammers from hiding links from the filters
1316                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1317                         $this->mOutput->addExternalLink( $pasteurized );
1318                 }
1319
1320                 wfProfileOut( $fname );
1321                 return $s;
1322         }
1323
1324         /**
1325          * Replace anything that looks like a URL with a link
1326          * @private
1327          */
1328         function replaceFreeExternalLinks( $text ) {
1329                 global $wgContLang;
1330                 $fname = 'Parser::replaceFreeExternalLinks';
1331                 wfProfileIn( $fname );
1332
1333                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1334                 $s = array_shift( $bits );
1335                 $i = 0;
1336
1337                 $sk =& $this->mOptions->getSkin();
1338
1339                 while ( $i < count( $bits ) ){
1340                         $protocol = $bits[$i++];
1341                         $remainder = $bits[$i++];
1342
1343                         $m = array();
1344                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1345                                 # Found some characters after the protocol that look promising
1346                                 $url = $protocol . $m[1];
1347                                 $trail = $m[2];
1348
1349                                 # special case: handle urls as url args:
1350                                 # http://www.example.com/foo?=http://www.example.com/bar
1351                                 if(strlen($trail) == 0 &&
1352                                         isset($bits[$i]) &&
1353                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1354                                         preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1355                                 {
1356                                         # add protocol, arg
1357                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1358                                         $i += 2;
1359                                         $trail = $m[2];
1360                                 }
1361
1362                                 # The characters '<' and '>' (which were escaped by
1363                                 # removeHTMLtags()) should not be included in
1364                                 # URLs, per RFC 2396.
1365                                 $m2 = array();
1366                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1367                                         $trail = substr($url, $m2[0][1]) . $trail;
1368                                         $url = substr($url, 0, $m2[0][1]);
1369                                 }
1370
1371                                 # Move trailing punctuation to $trail
1372                                 $sep = ',;\.:!?';
1373                                 # If there is no left bracket, then consider right brackets fair game too
1374                                 if ( strpos( $url, '(' ) === false ) {
1375                                         $sep .= ')';
1376                                 }
1377
1378                                 $numSepChars = strspn( strrev( $url ), $sep );
1379                                 if ( $numSepChars ) {
1380                                         $trail = substr( $url, -$numSepChars ) . $trail;
1381                                         $url = substr( $url, 0, -$numSepChars );
1382                                 }
1383
1384                                 $url = Sanitizer::cleanUrl( $url );
1385
1386                                 # Is this an external image?
1387                                 $text = $this->maybeMakeExternalImage( $url );
1388                                 if ( $text === false ) {
1389                                         # Not an image, make a link
1390                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1391                                         # Register it in the output object...
1392                                         # Replace unnecessary URL escape codes with their equivalent characters
1393                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1394                                         $this->mOutput->addExternalLink( $pasteurized );
1395                                 }
1396                                 $s .= $text . $trail;
1397                         } else {
1398                                 $s .= $protocol . $remainder;
1399                         }
1400                 }
1401                 wfProfileOut( $fname );
1402                 return $s;
1403         }
1404
1405         /**
1406          * Replace unusual URL escape codes with their equivalent characters
1407          * @param string
1408          * @return string
1409          * @static
1410          * @fixme This can merge genuinely required bits in the path or query string,
1411          *        breaking legit URLs. A proper fix would treat the various parts of
1412          *        the URL differently; as a workaround, just use the output for
1413          *        statistical records, not for actual linking/output.
1414          */
1415         static function replaceUnusualEscapes( $url ) {
1416                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1417                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1418         }
1419
1420         /**
1421          * Callback function used in replaceUnusualEscapes().
1422          * Replaces unusual URL escape codes with their equivalent character
1423          * @static
1424          * @private
1425          */
1426         private static function replaceUnusualEscapesCallback( $matches ) {
1427                 $char = urldecode( $matches[0] );
1428                 $ord = ord( $char );
1429                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1430                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1431                         // No, shouldn't be escaped
1432                         return $char;
1433                 } else {
1434                         // Yes, leave it escaped
1435                         return $matches[0];
1436                 }
1437         }
1438
1439         /**
1440          * make an image if it's allowed, either through the global
1441          * option or through the exception
1442          * @private
1443          */
1444         function maybeMakeExternalImage( $url ) {
1445                 $sk =& $this->mOptions->getSkin();
1446                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1447                 $imagesexception = !empty($imagesfrom);
1448                 $text = false;
1449                 if ( $this->mOptions->getAllowExternalImages()
1450                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1451                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1452                                 # Image found
1453                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1454                         }
1455                 }
1456                 return $text;
1457         }
1458
1459         /**
1460          * Process [[ ]] wikilinks
1461          *
1462          * @private
1463          */
1464         function replaceInternalLinks( $s ) {
1465                 global $wgContLang;
1466                 static $fname = 'Parser::replaceInternalLinks' ;
1467
1468                 wfProfileIn( $fname );
1469
1470                 wfProfileIn( $fname.'-setup' );
1471                 static $tc = FALSE;
1472                 # the % is needed to support urlencoded titles as well
1473                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1474
1475                 $sk =& $this->mOptions->getSkin();
1476
1477                 #split the entire text string on occurences of [[
1478                 $a = explode( '[[', ' ' . $s );
1479                 #get the first element (all text up to first [[), and remove the space we added
1480                 $s = array_shift( $a );
1481                 $s = substr( $s, 1 );
1482
1483                 # Match a link having the form [[namespace:link|alternate]]trail
1484                 static $e1 = FALSE;
1485                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1486                 # Match cases where there is no "]]", which might still be images
1487                 static $e1_img = FALSE;
1488                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1489                 # Match the end of a line for a word that's not followed by whitespace,
1490                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1491                 $e2 = wfMsgForContent( 'linkprefix' );
1492
1493                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1494
1495                 if( is_null( $this->mTitle ) ) {
1496                         throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
1497                 }
1498                 $nottalk = !$this->mTitle->isTalkPage();
1499
1500                 if ( $useLinkPrefixExtension ) {
1501                         $m = array();
1502                         if ( preg_match( $e2, $s, $m ) ) {
1503                                 $first_prefix = $m[2];
1504                         } else {
1505                                 $first_prefix = false;
1506                         }
1507                 } else {
1508                         $prefix = '';
1509                 }
1510
1511                 $selflink = $this->mTitle->getPrefixedText();
1512                 $useSubpages = $this->areSubpagesAllowed();
1513                 wfProfileOut( $fname.'-setup' );
1514
1515                 # Loop for each link
1516                 for ($k = 0; isset( $a[$k] ); $k++) {
1517                         $line = $a[$k];
1518                         if ( $useLinkPrefixExtension ) {
1519                                 wfProfileIn( $fname.'-prefixhandling' );
1520                                 if ( preg_match( $e2, $s, $m ) ) {
1521                                         $prefix = $m[2];
1522                                         $s = $m[1];
1523                                 } else {
1524                                         $prefix='';
1525                                 }
1526                                 # first link
1527                                 if($first_prefix) {
1528                                         $prefix = $first_prefix;
1529                                         $first_prefix = false;
1530                                 }
1531                                 wfProfileOut( $fname.'-prefixhandling' );
1532                         }
1533
1534                         $might_be_img = false;
1535
1536                         wfProfileIn( "$fname-e1" );
1537                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1538                                 $text = $m[2];
1539                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1540                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1541                                 # the real problem is with the $e1 regex
1542                                 # See bug 1300.
1543                                 #
1544                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1545                                 # and no image is in sight. See bug 2095.
1546                                 #
1547                                 if( $text !== '' &&
1548                                         substr( $m[3], 0, 1 ) === ']' &&
1549                                         strpos($text, '[') !== false
1550                                 )
1551                                 {
1552                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1553                                         $m[3] = substr( $m[3], 1 );
1554                                 }
1555                                 # fix up urlencoded title texts
1556                                 if( strpos( $m[1], '%' ) !== false ) {
1557                                         # Should anchors '#' also be rejected?
1558                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1559                                 }
1560                                 $trail = $m[3];
1561                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1562                                 $might_be_img = true;
1563                                 $text = $m[2];
1564                                 if ( strpos( $m[1], '%' ) !== false ) {
1565                                        $m[1] = urldecode($m[1]);
1566                                 }
1567                                 $trail = "";
1568                         } else { # Invalid form; output directly
1569                                 $s .= $prefix . '[[' . $line ;
1570                                 wfProfileOut( "$fname-e1" );
1571                                 continue;
1572                         }
1573                         wfProfileOut( "$fname-e1" );
1574                         wfProfileIn( "$fname-misc" );
1575
1576                         # Don't allow internal links to pages containing
1577                         # PROTO: where PROTO is a valid URL protocol; these
1578                         # should be external links.
1579                         if (preg_match('/^(\b(?:' . wfUrlProtocols() . '))/', $m[1])) {
1580                                 $s .= $prefix . '[[' . $line ;
1581                                 continue;
1582                         }
1583
1584                         # Make subpage if necessary
1585                         if( $useSubpages ) {
1586                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1587                         } else {
1588                                 $link = $m[1];
1589                         }
1590
1591                         $noforce = (substr($m[1], 0, 1) != ':');
1592                         if (!$noforce) {
1593                                 # Strip off leading ':'
1594                                 $link = substr($link, 1);
1595                         }
1596
1597                         wfProfileOut( "$fname-misc" );
1598                         wfProfileIn( "$fname-title" );
1599                         $nt = Title::newFromText( $this->mStripState->unstripNoWiki($link) );
1600                         if( !$nt ) {
1601                                 $s .= $prefix . '[[' . $line;
1602                                 wfProfileOut( "$fname-title" );
1603                                 continue;
1604                         }
1605
1606                         $ns = $nt->getNamespace();
1607                         $iw = $nt->getInterWiki();
1608                         wfProfileOut( "$fname-title" );
1609
1610                         if ($might_be_img) { # if this is actually an invalid link
1611                                 wfProfileIn( "$fname-might_be_img" );
1612                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1613                                         $found = false;
1614                                         while (isset ($a[$k+1]) ) {
1615                                                 #look at the next 'line' to see if we can close it there
1616                                                 $spliced = array_splice( $a, $k + 1, 1 );
1617                                                 $next_line = array_shift( $spliced );
1618                                                 $m = explode( ']]', $next_line, 3 );
1619                                                 if ( count( $m ) == 3 ) {
1620                                                         # the first ]] closes the inner link, the second the image
1621                                                         $found = true;
1622                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1623                                                         $trail = $m[2];
1624                                                         break;
1625                                                 } elseif ( count( $m ) == 2 ) {
1626                                                         #if there's exactly one ]] that's fine, we'll keep looking
1627                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1628                                                 } else {
1629                                                         #if $next_line is invalid too, we need look no further
1630                                                         $text .= '[[' . $next_line;
1631                                                         break;
1632                                                 }
1633                                         }
1634                                         if ( !$found ) {
1635                                                 # we couldn't find the end of this imageLink, so output it raw
1636                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1637                                                 $text = $this->replaceInternalLinks($text);
1638                                                 $s .= "{$prefix}[[$link|$text";
1639                                                 # note: no $trail, because without an end, there *is* no trail
1640                                                 wfProfileOut( "$fname-might_be_img" );
1641                                                 continue;
1642                                         }
1643                                 } else { #it's not an image, so output it raw
1644                                         $s .= "{$prefix}[[$link|$text";
1645                                         # note: no $trail, because without an end, there *is* no trail
1646                                         wfProfileOut( "$fname-might_be_img" );
1647                                         continue;
1648                                 }
1649                                 wfProfileOut( "$fname-might_be_img" );
1650                         }
1651
1652                         $wasblank = ( '' == $text );
1653                         if( $wasblank ) $text = $link;
1654
1655                         # Link not escaped by : , create the various objects
1656                         if( $noforce ) {
1657
1658                                 # Interwikis
1659                                 wfProfileIn( "$fname-interwiki" );
1660                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1661                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1662                                         $s = rtrim($s . "\n");
1663                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1664                                         wfProfileOut( "$fname-interwiki" );
1665                                         continue;
1666                                 }
1667                                 wfProfileOut( "$fname-interwiki" );
1668
1669                                 if ( $ns == NS_IMAGE ) {
1670                                         wfProfileIn( "$fname-image" );
1671                                         if ( !wfIsBadImage( $nt->getDBkey(), $this->mTitle ) ) {
1672                                                 # recursively parse links inside the image caption
1673                                                 # actually, this will parse them in any other parameters, too,
1674                                                 # but it might be hard to fix that, and it doesn't matter ATM
1675                                                 $text = $this->replaceExternalLinks($text);
1676                                                 $text = $this->replaceInternalLinks($text);
1677
1678                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1679                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1680                                                 $this->mOutput->addImage( $nt->getDBkey() );
1681
1682                                                 wfProfileOut( "$fname-image" );
1683                                                 continue;
1684                                         } else {
1685                                                 # We still need to record the image's presence on the page
1686                                                 $this->mOutput->addImage( $nt->getDBkey() );
1687                                         }
1688                                         wfProfileOut( "$fname-image" );
1689
1690                                 }
1691
1692                                 if ( $ns == NS_CATEGORY ) {
1693                                         wfProfileIn( "$fname-category" );
1694                                         $s = rtrim($s . "\n"); # bug 87
1695
1696                                         if ( $wasblank ) {
1697                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1698                                                         $sortkey = $this->mTitle->getText();
1699                                                 } else {
1700                                                         $sortkey = $this->mTitle->getPrefixedText();
1701                                                 }
1702                                         } else {
1703                                                 $sortkey = $text;
1704                                         }
1705                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1706                                         $sortkey = str_replace( "\n", '', $sortkey );
1707                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1708                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1709
1710                                         /**
1711                                          * Strip the whitespace Category links produce, see bug 87
1712                                          * @todo We might want to use trim($tmp, "\n") here.
1713                                          */
1714                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1715
1716                                         wfProfileOut( "$fname-category" );
1717                                         continue;
1718                                 }
1719                         }
1720
1721                         if( ( $nt->getPrefixedText() === $selflink ) &&
1722                             ( $nt->getFragment() === '' ) ) {
1723                                 # Self-links are handled specially; generally de-link and change to bold.
1724                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1725                                 continue;
1726                         }
1727
1728                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1729                         if( $ns == NS_MEDIA ) {
1730                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1731                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1732                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1733                                 $this->mOutput->addImage( $nt->getDBkey() );
1734                                 continue;
1735                         } elseif( $ns == NS_SPECIAL ) {
1736                                 $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1737                                 continue;
1738                         } elseif( $ns == NS_IMAGE ) {
1739                                 $img = new Image( $nt );
1740                                 if( $img->exists() ) {
1741                                         // Force a blue link if the file exists; may be a remote
1742                                         // upload on the shared repository, and we want to see its
1743                                         // auto-generated page.
1744                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1745                                         $this->mOutput->addLink( $nt );
1746                                         continue;
1747                                 }
1748                         }
1749                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1750                 }
1751                 wfProfileOut( $fname );
1752                 return $s;
1753         }
1754
1755         /**
1756          * Make a link placeholder. The text returned can be later resolved to a real link with
1757          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1758          * parsing of interwiki links, and secondly to allow all existence checks and
1759          * article length checks (for stub links) to be bundled into a single query.
1760          *
1761          */
1762         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1763                 wfProfileIn( __METHOD__ );
1764                 if ( ! is_object($nt) ) {
1765                         # Fail gracefully
1766                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1767                 } else {
1768                         # Separate the link trail from the rest of the link
1769                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1770
1771                         if ( $nt->isExternal() ) {
1772                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1773                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1774                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1775                         } else {
1776                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1777                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1778                                 $this->mLinkHolders['queries'][] = $query;
1779                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1780                                 $this->mLinkHolders['titles'][] = $nt;
1781
1782                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1783                         }
1784                 }
1785                 wfProfileOut( __METHOD__ );
1786                 return $retVal;
1787         }
1788
1789         /**
1790          * Render a forced-blue link inline; protect against double expansion of
1791          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1792          * Since this little disaster has to split off the trail text to avoid
1793          * breaking URLs in the following text without breaking trails on the
1794          * wiki links, it's been made into a horrible function.
1795          *
1796          * @param Title $nt
1797          * @param string $text
1798          * @param string $query
1799          * @param string $trail
1800          * @param string $prefix
1801          * @return string HTML-wikitext mix oh yuck
1802          */
1803         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1804                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1805                 $sk =& $this->mOptions->getSkin();
1806                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1807                 return $this->armorLinks( $link ) . $trail;
1808         }
1809
1810         /**
1811          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1812          * going to go through further parsing steps before inline URL expansion.
1813          *
1814          * In particular this is important when using action=render, which causes
1815          * full URLs to be included.
1816          *
1817          * Oh man I hate our multi-layer parser!
1818          *
1819          * @param string more-or-less HTML
1820          * @return string less-or-more HTML with NOPARSE bits
1821          */
1822         function armorLinks( $text ) {
1823                 return preg_replace( "/\b(" . wfUrlProtocols() . ')/',
1824                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1825         }
1826
1827         /**
1828          * Return true if subpage links should be expanded on this page.
1829          * @return bool
1830          */
1831         function areSubpagesAllowed() {
1832                 # Some namespaces don't allow subpages
1833                 global $wgNamespacesWithSubpages;
1834                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1835         }
1836
1837         /**
1838          * Handle link to subpage if necessary
1839          * @param string $target the source of the link
1840          * @param string &$text the link text, modified as necessary
1841          * @return string the full name of the link
1842          * @private
1843          */
1844         function maybeDoSubpageLink($target, &$text) {
1845                 # Valid link forms:
1846                 # Foobar -- normal
1847                 # :Foobar -- override special treatment of prefix (images, language links)
1848                 # /Foobar -- convert to CurrentPage/Foobar
1849                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1850                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1851                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1852
1853                 $fname = 'Parser::maybeDoSubpageLink';
1854                 wfProfileIn( $fname );
1855                 $ret = $target; # default return value is no change
1856
1857                 # bug 7425
1858                 $target = trim( $target );
1859
1860                 # Some namespaces don't allow subpages,
1861                 # so only perform processing if subpages are allowed
1862                 if( $this->areSubpagesAllowed() ) {
1863                         # Look at the first character
1864                         if( $target != '' && $target{0} == '/' ) {
1865                                 # / at end means we don't want the slash to be shown
1866                                 if( substr( $target, -1, 1 ) == '/' ) {
1867                                         $target = substr( $target, 1, -1 );
1868                                         $noslash = $target;
1869                                 } else {
1870                                         $noslash = substr( $target, 1 );
1871                                 }
1872
1873                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1874                                 if( '' === $text ) {
1875                                         $text = $target;
1876                                 } # this might be changed for ugliness reasons
1877                         } else {
1878                                 # check for .. subpage backlinks
1879                                 $dotdotcount = 0;
1880                                 $nodotdot = $target;
1881                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1882                                         ++$dotdotcount;
1883                                         $nodotdot = substr( $nodotdot, 3 );
1884                                 }
1885                                 if($dotdotcount > 0) {
1886                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1887                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1888                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1889                                                 # / at the end means don't show full path
1890                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1891                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1892                                                         if( '' === $text ) {
1893                                                                 $text = $nodotdot;
1894                                                         }
1895                                                 }
1896                                                 $nodotdot = trim( $nodotdot );
1897                                                 if( $nodotdot != '' ) {
1898                                                         $ret .= '/' . $nodotdot;
1899                                                 }
1900                                         }
1901                                 }
1902                         }
1903                 }
1904
1905                 wfProfileOut( $fname );
1906                 return $ret;
1907         }
1908
1909         /**#@+
1910          * Used by doBlockLevels()
1911          * @private
1912          */
1913         /* private */ function closeParagraph() {
1914                 $result = '';
1915                 if ( '' != $this->mLastSection ) {
1916                         $result = '</' . $this->mLastSection  . ">\n";
1917                 }
1918                 $this->mInPre = false;
1919                 $this->mLastSection = '';
1920                 return $result;
1921         }
1922         # getCommon() returns the length of the longest common substring
1923         # of both arguments, starting at the beginning of both.
1924         #
1925         /* private */ function getCommon( $st1, $st2 ) {
1926                 $fl = strlen( $st1 );
1927                 $shorter = strlen( $st2 );
1928                 if ( $fl < $shorter ) { $shorter = $fl; }
1929
1930                 for ( $i = 0; $i < $shorter; ++$i ) {
1931                         if ( $st1{$i} != $st2{$i} ) { break; }
1932                 }
1933                 return $i;
1934         }
1935         # These next three functions open, continue, and close the list
1936         # element appropriate to the prefix character passed into them.
1937         #
1938         /* private */ function openList( $char ) {
1939                 $result = $this->closeParagraph();
1940
1941                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1942                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1943                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1944                 else if ( ';' == $char ) {
1945                         $result .= '<dl><dt>';
1946                         $this->mDTopen = true;
1947                 }
1948                 else { $result = '<!-- ERR 1 -->'; }
1949
1950                 return $result;
1951         }
1952
1953         /* private */ function nextItem( $char ) {
1954                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1955                 else if ( ':' == $char || ';' == $char ) {
1956                         $close = '</dd>';
1957                         if ( $this->mDTopen ) { $close = '</dt>'; }
1958                         if ( ';' == $char ) {
1959                                 $this->mDTopen = true;
1960                                 return $close . '<dt>';
1961                         } else {
1962                                 $this->mDTopen = false;
1963                                 return $close . '<dd>';
1964                         }
1965                 }
1966                 return '<!-- ERR 2 -->';
1967         }
1968
1969         /* private */ function closeList( $char ) {
1970                 if ( '*' == $char ) { $text = '</li></ul>'; }
1971                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1972                 else if ( ':' == $char ) {
1973                         if ( $this->mDTopen ) {
1974                                 $this->mDTopen = false;
1975                                 $text = '</dt></dl>';
1976                         } else {
1977                                 $text = '</dd></dl>';
1978                         }
1979                 }
1980                 else {  return '<!-- ERR 3 -->'; }
1981                 return $text."\n";
1982         }
1983         /**#@-*/
1984
1985         /**
1986          * Make lists from lines starting with ':', '*', '#', etc.
1987          *
1988          * @private
1989          * @return string the lists rendered as HTML
1990          */
1991         function doBlockLevels( $text, $linestart ) {
1992                 $fname = 'Parser::doBlockLevels';
1993                 wfProfileIn( $fname );
1994
1995                 # Parsing through the text line by line.  The main thing
1996                 # happening here is handling of block-level elements p, pre,
1997                 # and making lists from lines starting with * # : etc.
1998                 #
1999                 $textLines = explode( "\n", $text );
2000
2001                 $lastPrefix = $output = '';
2002                 $this->mDTopen = $inBlockElem = false;
2003                 $prefixLength = 0;
2004                 $paragraphStack = false;
2005
2006                 if ( !$linestart ) {
2007                         $output .= array_shift( $textLines );
2008                 }
2009                 foreach ( $textLines as $oLine ) {
2010                         $lastPrefixLength = strlen( $lastPrefix );
2011                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
2012                         $preOpenMatch = preg_match('/<pre/i', $oLine );
2013                         if ( !$this->mInPre ) {
2014                                 # Multiple prefixes may abut each other for nested lists.
2015                                 $prefixLength = strspn( $oLine, '*#:;' );
2016                                 $pref = substr( $oLine, 0, $prefixLength );
2017
2018                                 # eh?
2019                                 $pref2 = str_replace( ';', ':', $pref );
2020                                 $t = substr( $oLine, $prefixLength );
2021                                 $this->mInPre = !empty($preOpenMatch);
2022                         } else {
2023                                 # Don't interpret any other prefixes in preformatted text
2024                                 $prefixLength = 0;
2025                                 $pref = $pref2 = '';
2026                                 $t = $oLine;
2027                         }
2028
2029                         # List generation
2030                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
2031                                 # Same as the last item, so no need to deal with nesting or opening stuff
2032                                 $output .= $this->nextItem( substr( $pref, -1 ) );
2033                                 $paragraphStack = false;
2034
2035                                 if ( substr( $pref, -1 ) == ';') {
2036                                         # The one nasty exception: definition lists work like this:
2037                                         # ; title : definition text
2038                                         # So we check for : in the remainder text to split up the
2039                                         # title and definition, without b0rking links.
2040                                         $term = $t2 = '';
2041                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2042                                                 $t = $t2;
2043                                                 $output .= $term . $this->nextItem( ':' );
2044                                         }
2045                                 }
2046                         } elseif( $prefixLength || $lastPrefixLength ) {
2047                                 # Either open or close a level...
2048                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
2049                                 $paragraphStack = false;
2050
2051                                 while( $commonPrefixLength < $lastPrefixLength ) {
2052                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
2053                                         --$lastPrefixLength;
2054                                 }
2055                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
2056                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
2057                                 }
2058                                 while ( $prefixLength > $commonPrefixLength ) {
2059                                         $char = substr( $pref, $commonPrefixLength, 1 );
2060                                         $output .= $this->openList( $char );
2061
2062                                         if ( ';' == $char ) {
2063                                                 # FIXME: This is dupe of code above
2064                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2065                                                         $t = $t2;
2066                                                         $output .= $term . $this->nextItem( ':' );
2067                                                 }
2068                                         }
2069                                         ++$commonPrefixLength;
2070                                 }
2071                                 $lastPrefix = $pref2;
2072                         }
2073                         if( 0 == $prefixLength ) {
2074                                 wfProfileIn( "$fname-paragraph" );
2075                                 # No prefix (not in list)--go to paragraph mode
2076                                 // XXX: use a stack for nestable elements like span, table and div
2077                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|<\\/center|<\\/tr|<\\/td|<\\/th)/iS', $t );
2078                                 $closematch = preg_match(
2079                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
2080                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul|<\\/ol|<center)/iS', $t );
2081                                 if ( $openmatch or $closematch ) {
2082                                         $paragraphStack = false;
2083                                         # TODO bug 5718: paragraph closed
2084                                         $output .= $this->closeParagraph();
2085                                         if ( $preOpenMatch and !$preCloseMatch ) {
2086                                                 $this->mInPre = true;
2087                                         }
2088                                         if ( $closematch ) {
2089                                                 $inBlockElem = false;
2090                                         } else {
2091                                                 $inBlockElem = true;
2092                                         }
2093                                 } else if ( !$inBlockElem && !$this->mInPre ) {
2094                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
2095                                                 // pre
2096                                                 if ($this->mLastSection != 'pre') {
2097                                                         $paragraphStack = false;
2098                                                         $output .= $this->closeParagraph().'<pre>';
2099                                                         $this->mLastSection = 'pre';
2100                                                 }
2101                                                 $t = substr( $t, 1 );
2102                                         } else {
2103                                                 // paragraph
2104                                                 if ( '' == trim($t) ) {
2105                                                         if ( $paragraphStack ) {
2106                                                                 $output .= $paragraphStack.'<br />';
2107                                                                 $paragraphStack = false;
2108                                                                 $this->mLastSection = 'p';
2109                                                         } else {
2110                                                                 if ($this->mLastSection != 'p' ) {
2111                                                                         $output .= $this->closeParagraph();
2112                                                                         $this->mLastSection = '';
2113                                                                         $paragraphStack = '<p>';
2114                                                                 } else {
2115                                                                         $paragraphStack = '</p><p>';
2116                                                                 }
2117                                                         }
2118                                                 } else {
2119                                                         if ( $paragraphStack ) {
2120                                                                 $output .= $paragraphStack;
2121                                                                 $paragraphStack = false;
2122                                                                 $this->mLastSection = 'p';
2123                                                         } else if ($this->mLastSection != 'p') {
2124                                                                 $output .= $this->closeParagraph().'<p>';
2125                                                                 $this->mLastSection = 'p';
2126                                                         }
2127                                                 }
2128                                         }
2129                                 }
2130                                 wfProfileOut( "$fname-paragraph" );
2131                         }
2132                         // somewhere above we forget to get out of pre block (bug 785)
2133                         if($preCloseMatch && $this->mInPre) {
2134                                 $this->mInPre = false;
2135                         }
2136                         if ($paragraphStack === false) {
2137                                 $output .= $t."\n";
2138                         }
2139                 }
2140                 while ( $prefixLength ) {
2141                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2142                         --$prefixLength;
2143                 }
2144                 if ( '' != $this->mLastSection ) {
2145                         $output .= '</' . $this->mLastSection . '>';
2146                         $this->mLastSection = '';
2147                 }
2148
2149                 wfProfileOut( $fname );
2150                 return $output;
2151         }
2152
2153         /**
2154          * Split up a string on ':', ignoring any occurences inside tags
2155          * to prevent illegal overlapping.
2156          * @param string $str the string to split
2157          * @param string &$before set to everything before the ':'
2158          * @param string &$after set to everything after the ':'
2159          * return string the position of the ':', or false if none found
2160          */
2161         function findColonNoLinks($str, &$before, &$after) {
2162                 $fname = 'Parser::findColonNoLinks';
2163                 wfProfileIn( $fname );
2164
2165                 $pos = strpos( $str, ':' );
2166                 if( $pos === false ) {
2167                         // Nothing to find!
2168                         wfProfileOut( $fname );
2169                         return false;
2170                 }
2171
2172                 $lt = strpos( $str, '<' );
2173                 if( $lt === false || $lt > $pos ) {
2174                         // Easy; no tag nesting to worry about
2175                         $before = substr( $str, 0, $pos );
2176                         $after = substr( $str, $pos+1 );
2177                         wfProfileOut( $fname );
2178                         return $pos;
2179                 }
2180
2181                 // Ugly state machine to walk through avoiding tags.
2182                 $state = MW_COLON_STATE_TEXT;
2183                 $stack = 0;
2184                 $len = strlen( $str );
2185                 for( $i = 0; $i < $len; $i++ ) {
2186                         $c = $str{$i};
2187
2188                         switch( $state ) {
2189                         // (Using the number is a performance hack for common cases)
2190                         case 0: // MW_COLON_STATE_TEXT:
2191                                 switch( $c ) {
2192                                 case "<":
2193                                         // Could be either a <start> tag or an </end> tag
2194                                         $state = MW_COLON_STATE_TAGSTART;
2195                                         break;
2196                                 case ":":
2197                                         if( $stack == 0 ) {
2198                                                 // We found it!
2199                                                 $before = substr( $str, 0, $i );
2200                                                 $after = substr( $str, $i + 1 );
2201                                                 wfProfileOut( $fname );
2202                                                 return $i;
2203                                         }
2204                                         // Embedded in a tag; don't break it.
2205                                         break;
2206                                 default:
2207                                         // Skip ahead looking for something interesting
2208                                         $colon = strpos( $str, ':', $i );
2209                                         if( $colon === false ) {
2210                                                 // Nothing else interesting
2211                                                 wfProfileOut( $fname );
2212                                                 return false;
2213                                         }
2214                                         $lt = strpos( $str, '<', $i );
2215                                         if( $stack === 0 ) {
2216                                                 if( $lt === false || $colon < $lt ) {
2217                                                         // We found it!
2218                                                         $before = substr( $str, 0, $colon );
2219                                                         $after = substr( $str, $colon + 1 );
2220                                                         wfProfileOut( $fname );
2221                                                         return $i;
2222                                                 }
2223                                         }
2224                                         if( $lt === false ) {
2225                                                 // Nothing else interesting to find; abort!
2226                                                 // We're nested, but there's no close tags left. Abort!
2227                                                 break 2;
2228                                         }
2229                                         // Skip ahead to next tag start
2230                                         $i = $lt;
2231                                         $state = MW_COLON_STATE_TAGSTART;
2232                                 }
2233                                 break;
2234                         case 1: // MW_COLON_STATE_TAG:
2235                                 // In a <tag>
2236                                 switch( $c ) {
2237                                 case ">":
2238                                         $stack++;
2239                                         $state = MW_COLON_STATE_TEXT;
2240                                         break;
2241                                 case "/":
2242                                         // Slash may be followed by >?
2243                                         $state = MW_COLON_STATE_TAGSLASH;
2244                                         break;
2245                                 default:
2246                                         // ignore
2247                                 }
2248                                 break;
2249                         case 2: // MW_COLON_STATE_TAGSTART:
2250                                 switch( $c ) {
2251                                 case "/":
2252                                         $state = MW_COLON_STATE_CLOSETAG;
2253                                         break;
2254                                 case "!":
2255                                         $state = MW_COLON_STATE_COMMENT;
2256                                         break;
2257                                 case ">":
2258                                         // Illegal early close? This shouldn't happen D:
2259                                         $state = MW_COLON_STATE_TEXT;
2260                                         break;
2261                                 default:
2262                                         $state = MW_COLON_STATE_TAG;
2263                                 }
2264                                 break;
2265                         case 3: // MW_COLON_STATE_CLOSETAG:
2266                                 // In a </tag>
2267                                 if( $c == ">" ) {
2268                                         $stack--;
2269                                         if( $stack < 0 ) {
2270                                                 wfDebug( "Invalid input in $fname; too many close tags\n" );
2271                                                 wfProfileOut( $fname );
2272                                                 return false;
2273                                         }
2274                                         $state = MW_COLON_STATE_TEXT;
2275                                 }
2276                                 break;
2277                         case MW_COLON_STATE_TAGSLASH:
2278                                 if( $c == ">" ) {
2279                                         // Yes, a self-closed tag <blah/>
2280                                         $state = MW_COLON_STATE_TEXT;
2281                                 } else {
2282                                         // Probably we're jumping the gun, and this is an attribute
2283                                         $state = MW_COLON_STATE_TAG;
2284                                 }
2285                                 break;
2286                         case 5: // MW_COLON_STATE_COMMENT:
2287                                 if( $c == "-" ) {
2288                                         $state = MW_COLON_STATE_COMMENTDASH;
2289                                 }
2290                                 break;
2291                         case MW_COLON_STATE_COMMENTDASH:
2292                                 if( $c == "-" ) {
2293                                         $state = MW_COLON_STATE_COMMENTDASHDASH;
2294                                 } else {
2295                                         $state = MW_COLON_STATE_COMMENT;
2296                                 }
2297                                 break;
2298                         case MW_COLON_STATE_COMMENTDASHDASH:
2299                                 if( $c == ">" ) {
2300                                         $state = MW_COLON_STATE_TEXT;
2301                                 } else {
2302                                         $state = MW_COLON_STATE_COMMENT;
2303                                 }
2304                                 break;
2305                         default:
2306                                 throw new MWException( "State machine error in $fname" );
2307                         }
2308                 }
2309                 if( $stack > 0 ) {
2310                         wfDebug( "Invalid input in $fname; not enough close tags (stack $stack, state $state)\n" );
2311                         return false;
2312                 }
2313                 wfProfileOut( $fname );
2314                 return false;
2315         }
2316
2317         /**
2318          * Return value of a magic variable (like PAGENAME)
2319          *
2320          * @private
2321          */
2322         function getVariableValue( $index ) {
2323                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2324
2325                 /**
2326                  * Some of these require message or data lookups and can be
2327                  * expensive to check many times.
2328                  */
2329                 static $varCache = array();
2330                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$varCache ) ) ) {
2331                         if ( isset( $varCache[$index] ) ) {
2332                                 return $varCache[$index];
2333                         }
2334                 }
2335
2336                 $ts = time();
2337                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2338
2339                 # Use the time zone
2340                 global $wgLocaltimezone;
2341                 if ( isset( $wgLocaltimezone ) ) {
2342                         $oldtz = getenv( 'TZ' );
2343                         putenv( 'TZ='.$wgLocaltimezone );
2344                 }
2345                 $localTimestamp = date( 'YmdHis', $ts );
2346                 $localMonth = date( 'm', $ts );
2347                 $localMonthName = date( 'n', $ts );
2348                 $localDay = date( 'j', $ts );
2349                 $localDay2 = date( 'd', $ts );
2350                 $localDayOfWeek = date( 'w', $ts );
2351                 $localWeek = date( 'W', $ts );
2352                 $localYear = date( 'Y', $ts );
2353                 $localHour = date( 'H', $ts );
2354                 if ( isset( $wgLocaltimezone ) ) {
2355                         putenv( 'TZ='.$oldtz );
2356                 }
2357
2358                 switch ( $index ) {
2359                         case 'currentmonth':
2360                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm', $ts ) );
2361                         case 'currentmonthname':
2362                                 return $varCache[$index] = $wgContLang->getMonthName( date( 'n', $ts ) );
2363                         case 'currentmonthnamegen':
2364                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date( 'n', $ts ) );
2365                         case 'currentmonthabbrev':
2366                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date( 'n', $ts ) );
2367                         case 'currentday':
2368                                 return $varCache[$index] = $wgContLang->formatNum( date( 'j', $ts ) );
2369                         case 'currentday2':
2370                                 return $varCache[$index] = $wgContLang->formatNum( date( 'd', $ts ) );
2371                         case 'localmonth':
2372                                 return $varCache[$index] = $wgContLang->formatNum( $localMonth );
2373                         case 'localmonthname':
2374                                 return $varCache[$index] = $wgContLang->getMonthName( $localMonthName );
2375                         case 'localmonthnamegen':
2376                                 return $varCache[$index] = $wgContLang->getMonthNameGen( $localMonthName );
2377                         case 'localmonthabbrev':
2378                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( $localMonthName );
2379                         case 'localday':
2380                                 return $varCache[$index] = $wgContLang->formatNum( $localDay );
2381                         case 'localday2':
2382                                 return $varCache[$index] = $wgContLang->formatNum( $localDay2 );
2383                         case 'pagename':
2384                                 return $this->mTitle->getText();
2385                         case 'pagenamee':
2386                                 return $this->mTitle->getPartialURL();
2387                         case 'fullpagename':
2388                                 return $this->mTitle->getPrefixedText();
2389                         case 'fullpagenamee':
2390                                 return $this->mTitle->getPrefixedURL();
2391                         case 'subpagename':
2392                                 return $this->mTitle->getSubpageText();
2393                         case 'subpagenamee':
2394                                 return $this->mTitle->getSubpageUrlForm();
2395                         case 'basepagename':
2396                                 return $this->mTitle->getBaseText();
2397                         case 'basepagenamee':
2398                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2399                         case 'talkpagename':
2400                                 if( $this->mTitle->canTalk() ) {
2401                                         $talkPage = $this->mTitle->getTalkPage();
2402                                         return $talkPage->getPrefixedText();
2403                                 } else {
2404                                         return '';
2405                                 }
2406                         case 'talkpagenamee':
2407                                 if( $this->mTitle->canTalk() ) {
2408                                         $talkPage = $this->mTitle->getTalkPage();
2409                                         return $talkPage->getPrefixedUrl();
2410                                 } else {
2411                                         return '';
2412                                 }
2413                         case 'subjectpagename':
2414                                 $subjPage = $this->mTitle->getSubjectPage();
2415                                 return $subjPage->getPrefixedText();
2416                         case 'subjectpagenamee':
2417                                 $subjPage = $this->mTitle->getSubjectPage();
2418                                 return $subjPage->getPrefixedUrl();
2419                         case 'revisionid':
2420                                 return $this->mRevisionId;
2421                         case 'revisionday':
2422                                 return intval( substr( $this->getRevisionTimestamp(), 6, 2 ) );
2423                         case 'revisionday2':
2424                                 return substr( $this->getRevisionTimestamp(), 6, 2 );
2425                         case 'revisionmonth':
2426                                 return intval( substr( $this->getRevisionTimestamp(), 4, 2 ) );
2427                         case 'revisionyear':
2428                                 return substr( $this->getRevisionTimestamp(), 0, 4 );
2429                         case 'revisiontimestamp':
2430                                 return $this->getRevisionTimestamp();
2431                         case 'namespace':
2432                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2433                         case 'namespacee':
2434                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2435                         case 'talkspace':
2436                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2437                         case 'talkspacee':
2438                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2439                         case 'subjectspace':
2440                                 return $this->mTitle->getSubjectNsText();
2441                         case 'subjectspacee':
2442                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2443                         case 'currentdayname':
2444                                 return $varCache[$index] = $wgContLang->getWeekdayName( date( 'w', $ts ) + 1 );
2445                         case 'currentyear':
2446                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y', $ts ), true );
2447                         case 'currenttime':
2448                                 return $varCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2449                         case 'currenthour':
2450                                 return $varCache[$index] = $wgContLang->formatNum( date( 'H', $ts ), true );
2451                         case 'currentweek':
2452                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2453                                 // int to remove the padding
2454                                 return $varCache[$index] = $wgContLang->formatNum( (int)date( 'W', $ts ) );
2455                         case 'currentdow':
2456                                 return $varCache[$index] = $wgContLang->formatNum( date( 'w', $ts ) );
2457                         case 'localdayname':
2458                                 return $varCache[$index] = $wgContLang->getWeekdayName( $localDayOfWeek + 1 );
2459                         case 'localyear':
2460                                 return $varCache[$index] = $wgContLang->formatNum( $localYear, true );
2461                         case 'localtime':
2462                                 return $varCache[$index] = $wgContLang->time( $localTimestamp, false, false );
2463                         case 'localhour':
2464                                 return $varCache[$index] = $wgContLang->formatNum( $localHour, true );
2465                         case 'localweek':
2466                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2467                                 // int to remove the padding
2468                                 return $varCache[$index] = $wgContLang->formatNum( (int)$localWeek );
2469                         case 'localdow':
2470                                 return $varCache[$index] = $wgContLang->formatNum( $localDayOfWeek );
2471                         case 'numberofarticles':
2472                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::articles() );
2473                         case 'numberoffiles':
2474                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::images() );
2475                         case 'numberofusers':
2476                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::users() );
2477                         case 'numberofpages':
2478                                 return $varCache[$index] = $wgContLang->formatNum( SiteStats::pages() );
2479                         case 'numberofadmins':
2480                                 return $varCache[$index]  = $wgContLang->formatNum( SiteStats::admins() );
2481                         case 'currenttimestamp':
2482                                 return $varCache[$index] = wfTimestampNow();
2483                         case 'localtimestamp':
2484                                 return $varCache[$index] = $localTimestamp;
2485                         case 'currentversion':
2486                                 return $varCache[$index] = SpecialVersion::getVersion();
2487                         case 'sitename':
2488                                 return $wgSitename;
2489                         case 'server':
2490                                 return $wgServer;
2491                         case 'servername':
2492                                 return $wgServerName;
2493                         case 'scriptpath':
2494                                 return $wgScriptPath;
2495                         case 'directionmark':
2496                                 return $wgContLang->getDirMark();
2497                         case 'contentlanguage':
2498                                 global $wgContLanguageCode;
2499                                 return $wgContLanguageCode;
2500                         default:
2501                                 $ret = null;
2502                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$varCache, &$index, &$ret ) ) )
2503                                         return $ret;
2504                                 else
2505                                         return null;
2506                 }
2507         }
2508
2509         /**
2510          * initialise the magic variables (like CURRENTMONTHNAME)
2511          *
2512          * @private
2513          */
2514         function initialiseVariables() {
2515                 $fname = 'Parser::initialiseVariables';
2516                 wfProfileIn( $fname );
2517                 $variableIDs = MagicWord::getVariableIDs();
2518
2519                 $this->mVariables = array();
2520                 foreach ( $variableIDs as $id ) {
2521                         $mw =& MagicWord::get( $id );
2522                         $mw->addToArray( $this->mVariables, $id );
2523                 }
2524                 wfProfileOut( $fname );
2525         }
2526
2527         /**
2528          * parse any parentheses in format ((title|part|part))
2529          * and call callbacks to get a replacement text for any found piece
2530          *
2531          * @param string $text The text to parse
2532          * @param array $callbacks rules in form:
2533          *     '{' => array(                            # opening parentheses
2534          *                                      'end' => '}',   # closing parentheses
2535          *                                      'cb' => array(2 => callback,    # replacement callback to call if {{..}} is found
2536          *                                                                3 => callback         # replacement callback to call if {{{..}}} is found
2537          *                                                                )
2538          *                                      )
2539          *                                      'min' => 2,     # Minimum parenthesis count in cb
2540          *                                      'max' => 3,     # Maximum parenthesis count in cb
2541          * @private
2542          */
2543         function replace_callback ($text, $callbacks) {
2544                 wfProfileIn( __METHOD__ );
2545                 $openingBraceStack = array();   # this array will hold a stack of parentheses which are not closed yet
2546                 $lastOpeningBrace = -1;                 # last not closed parentheses
2547
2548                 $validOpeningBraces = implode( '', array_keys( $callbacks ) );
2549
2550                 $i = 0;
2551                 while ( $i < strlen( $text ) ) {
2552                         # Find next opening brace, closing brace or pipe
2553                         if ( $lastOpeningBrace == -1 ) {
2554                                 $currentClosing = '';
2555                                 $search = $validOpeningBraces;
2556                         } else {
2557                                 $currentClosing = $openingBraceStack[$lastOpeningBrace]['braceEnd'];
2558                                 $search = $validOpeningBraces . '|' . $currentClosing;
2559                         }
2560                         $rule = null;
2561                         $i += strcspn( $text, $search, $i );
2562                         if ( $i < strlen( $text ) ) {
2563                                 if ( $text[$i] == '|' ) {
2564                                         $found = 'pipe';
2565                                 } elseif ( $text[$i] == $currentClosing ) {
2566                                         $found = 'close';
2567                                 } elseif ( isset( $callbacks[$text[$i]] ) ) {
2568                                         $found = 'open';
2569                                         $rule = $callbacks[$text[$i]];
2570                                 } else {
2571                                         # Some versions of PHP have a strcspn which stops on null characters
2572                                         # Ignore and continue
2573                                         ++$i;
2574                                         continue;
2575                                 }
2576                         } else {
2577                                 # All done
2578                                 break;
2579                         }
2580
2581                         if ( $found == 'open' ) {
2582                                 # found opening brace, let's add it to parentheses stack
2583                                 $piece = array('brace' => $text[$i],
2584                                                            'braceEnd' => $rule['end'],
2585                                                            'title' => '',
2586                                                            'parts' => null);
2587
2588                                 # count opening brace characters
2589                                 $piece['count'] = strspn( $text, $piece['brace'], $i );
2590                                 $piece['startAt'] = $piece['partStart'] = $i + $piece['count'];
2591                                 $i += $piece['count'];
2592
2593                                 # we need to add to stack only if opening brace count is enough for one of the rules
2594                                 if ( $piece['count'] >= $rule['min'] ) {
2595                                         $lastOpeningBrace ++;
2596                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2597                                 }
2598                         } elseif ( $found == 'close' ) {
2599                                 # lets check if it is enough characters for closing brace
2600                                 $maxCount = $openingBraceStack[$lastOpeningBrace]['count'];
2601                                 $count = strspn( $text, $text[$i], $i, $maxCount );
2602
2603                                 # check for maximum matching characters (if there are 5 closing
2604                                 # characters, we will probably need only 3 - depending on the rules)
2605                                 $matchingCount = 0;
2606                                 $matchingCallback = null;
2607                                 $cbType = $callbacks[$openingBraceStack[$lastOpeningBrace]['brace']];
2608                                 if ( $count > $cbType['max'] ) {
2609                                         # The specified maximum exists in the callback array, unless the caller
2610                                         # has made an error
2611                                         $matchingCount = $cbType['max'];
2612                                 } else {
2613                                         # Count is less than the maximum
2614                                         # Skip any gaps in the callback array to find the true largest match
2615                                         # Need to use array_key_exists not isset because the callback can be null
2616                                         $matchingCount = $count;
2617                                         while ( $matchingCount > 0 && !array_key_exists( $matchingCount, $cbType['cb'] ) ) {
2618                                                 --$matchingCount;
2619                                         }
2620                                 }
2621
2622                                 if ($matchingCount <= 0) {
2623                                         $i += $count;
2624                                         continue;
2625                                 }
2626                                 $matchingCallback = $cbType['cb'][$matchingCount];
2627
2628                                 # let's set a title or last part (if '|' was found)
2629                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2630                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2631                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2632                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2633                                 } else {
2634                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2635                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2636                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2637                                 }
2638
2639                                 $pieceStart = $openingBraceStack[$lastOpeningBrace]['startAt'] - $matchingCount;
2640                                 $pieceEnd = $i + $matchingCount;
2641
2642                                 if( is_callable( $matchingCallback ) ) {
2643                                         $cbArgs = array (
2644                                                                          'text' => substr($text, $pieceStart, $pieceEnd - $pieceStart),
2645                                                                          'title' => trim($openingBraceStack[$lastOpeningBrace]['title']),
2646                                                                          'parts' => $openingBraceStack[$lastOpeningBrace]['parts'],
2647                                                                          'lineStart' => (($pieceStart > 0) && ($text[$pieceStart-1] == "\n")),
2648                                                                          );
2649                                         # finally we can call a user callback and replace piece of text
2650                                         $replaceWith = call_user_func( $matchingCallback, $cbArgs );
2651                                         $text = substr($text, 0, $pieceStart) . $replaceWith . substr($text, $pieceEnd);
2652                                         $i = $pieceStart + strlen($replaceWith);
2653                                 } else {
2654                                         # null value for callback means that parentheses should be parsed, but not replaced
2655                                         $i += $matchingCount;
2656                                 }
2657
2658                                 # reset last opening parentheses, but keep it in case there are unused characters
2659                                 $piece = array('brace' => $openingBraceStack[$lastOpeningBrace]['brace'],
2660                                                            'braceEnd' => $openingBraceStack[$lastOpeningBrace]['braceEnd'],
2661                                                            'count' => $openingBraceStack[$lastOpeningBrace]['count'],
2662                                                            'title' => '',
2663                                                            'parts' => null,
2664                                                            'startAt' => $openingBraceStack[$lastOpeningBrace]['startAt']);
2665                                 $openingBraceStack[$lastOpeningBrace--] = null;
2666
2667                                 if ($matchingCount < $piece['count']) {
2668                                         $piece['count'] -= $matchingCount;
2669                                         $piece['startAt'] -= $matchingCount;
2670                                         $piece['partStart'] = $piece['startAt'];
2671                                         # do we still qualify for any callback with remaining count?
2672                                         $currentCbList = $callbacks[$piece['brace']]['cb'];
2673                                         while ( $piece['count'] ) {
2674                                                 if ( array_key_exists( $piece['count'], $currentCbList ) ) {
2675                                                         $lastOpeningBrace++;
2676                                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2677                                                         break;
2678                                                 }
2679                                                 --$piece['count'];
2680                                         }
2681                                 }
2682                         } elseif ( $found == 'pipe' ) {
2683                                 # lets set a title if it is a first separator, or next part otherwise
2684                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2685                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2686                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2687                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2688                                         $openingBraceStack[$lastOpeningBrace]['parts'] = array();
2689                                 } else {
2690                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2691                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2692                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2693                                 }
2694                                 $openingBraceStack[$lastOpeningBrace]['partStart'] = ++$i;
2695                         }
2696                 }
2697
2698                 wfProfileOut( __METHOD__ );
2699                 return $text;
2700         }
2701
2702         /**
2703          * Replace magic variables, templates, and template arguments
2704          * with the appropriate text. Templates are substituted recursively,
2705          * taking care to avoid infinite loops.
2706          *
2707          * Note that the substitution depends on value of $mOutputType:
2708          *  OT_WIKI: only {{subst:}} templates
2709          *  OT_MSG: only magic variables
2710          *  OT_HTML: all templates and magic variables
2711          *
2712          * @param string $tex The text to transform
2713          * @param array $args Key-value pairs representing template parameters to substitute
2714          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
2715          * @private
2716          */
2717         function replaceVariables( $text, $args = array(), $argsOnly = false ) {
2718                 # Prevent too big inclusions
2719                 if( strlen( $text ) > $this->mOptions->getMaxIncludeSize() ) {
2720                         return $text;
2721                 }
2722
2723                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2724                 wfProfileIn( $fname );
2725
2726                 # This function is called recursively. To keep track of arguments we need a stack:
2727                 array_push( $this->mArgStack, $args );
2728
2729                 $braceCallbacks = array();
2730                 if ( !$argsOnly ) {
2731                         $braceCallbacks[2] = array( &$this, 'braceSubstitution' );
2732                 }
2733                 if ( $this->mOutputType != OT_MSG ) {
2734                         $braceCallbacks[3] = array( &$this, 'argSubstitution' );
2735                 }
2736                 if ( $braceCallbacks ) {
2737                         $callbacks = array(
2738                                 '{' => array(
2739                                         'end' => '}',
2740                                         'cb' => $braceCallbacks,
2741                                         'min' => $argsOnly ? 3 : 2,
2742                                         'max' => isset( $braceCallbacks[3] ) ? 3 : 2,
2743                                 ),
2744                                 '[' => array(
2745                                         'end' => ']',
2746                                         'cb' => array(2=>null),
2747                                         'min' => 2,
2748                                         'max' => 2,
2749                                 )
2750                         );
2751                         $text = $this->replace_callback ($text, $callbacks);
2752
2753                         array_pop( $this->mArgStack );
2754                 }
2755                 wfProfileOut( $fname );
2756                 return $text;
2757         }
2758
2759         /**
2760          * Replace magic variables
2761          * @private
2762          */
2763         function variableSubstitution( $matches ) {
2764                 global $wgContLang;
2765                 $fname = 'Parser::variableSubstitution';
2766                 $varname = $wgContLang->lc($matches[1]);
2767                 wfProfileIn( $fname );
2768                 $skip = false;
2769                 if ( $this->mOutputType == OT_WIKI ) {
2770                         # Do only magic variables prefixed by SUBST
2771                         $mwSubst =& MagicWord::get( 'subst' );
2772                         if (!$mwSubst->matchStartAndRemove( $varname ))
2773                                 $skip = true;
2774                         # Note that if we don't substitute the variable below,
2775                         # we don't remove the {{subst:}} magic word, in case
2776                         # it is a template rather than a magic variable.
2777                 }
2778                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
2779                         $id = $this->mVariables[$varname];
2780                         # Now check if we did really match, case sensitive or not
2781                         $mw =& MagicWord::get( $id );
2782                         if ($mw->match($matches[1])) {
2783                                 $text = $this->getVariableValue( $id );
2784                                 $this->mOutput->mContainsOldMagic = true;
2785                         } else {
2786                                 $text = $matches[0];
2787                         }
2788                 } else {
2789                         $text = $matches[0];
2790                 }
2791                 wfProfileOut( $fname );
2792                 return $text;
2793         }
2794
2795         /**
2796          * Return the text of a template, after recursively
2797          * replacing any variables or templates within the template.
2798          *
2799          * @param array $piece The parts of the template
2800          *  $piece['text']: matched text
2801          *  $piece['title']: the title, i.e. the part before the |
2802          *  $piece['parts']: the parameter array
2803          * @return string the text of the template
2804          * @private
2805          */
2806         function braceSubstitution( $piece ) {
2807                 global $wgContLang, $wgLang, $wgAllowDisplayTitle;
2808                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2809                 wfProfileIn( $fname );
2810                 wfProfileIn( __METHOD__.'-setup' );
2811
2812                 # Flags
2813                 $found = false;             # $text has been filled
2814                 $nowiki = false;            # wiki markup in $text should be escaped
2815                 $noparse = false;           # Unsafe HTML tags should not be stripped, etc.
2816                 $noargs = false;            # Don't replace triple-brace arguments in $text
2817                 $replaceHeadings = false;   # Make the edit section links go to the template not the article
2818                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
2819                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
2820
2821                 # Title object, where $text came from
2822                 $title = NULL;
2823
2824                 $linestart = '';
2825
2826
2827                 # $part1 is the bit before the first |, and must contain only title characters
2828                 # $args is a list of arguments, starting from index 0, not including $part1
2829
2830                 $titleText = $part1 = $piece['title'];
2831                 # If the third subpattern matched anything, it will start with |
2832
2833                 if (null == $piece['parts']) {
2834                         $replaceWith = $this->variableSubstitution (array ($piece['text'], $piece['title']));
2835                         if ($replaceWith != $piece['text']) {
2836                                 $text = $replaceWith;
2837                                 $found = true;
2838                                 $noparse = true;
2839                                 $noargs = true;
2840                         }
2841                 }
2842
2843                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
2844                 wfProfileOut( __METHOD__.'-setup' );
2845
2846                 # SUBST
2847                 wfProfileIn( __METHOD__.'-modifiers' );
2848                 if ( !$found ) {
2849                         $mwSubst =& MagicWord::get( 'subst' );
2850                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor $this->ot['wiki'] ) {
2851                                 # One of two possibilities is true:
2852                                 # 1) Found SUBST but not in the PST phase
2853                                 # 2) Didn't find SUBST and in the PST phase
2854                                 # In either case, return without further processing
2855                                 $text = $piece['text'];
2856                                 $found = true;
2857                                 $noparse = true;
2858                                 $noargs = true;
2859                         }
2860                 }
2861
2862                 # MSG, MSGNW and RAW
2863                 if ( !$found ) {
2864                         # Check for MSGNW:
2865                         $mwMsgnw =& MagicWord::get( 'msgnw' );
2866                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2867                                 $nowiki = true;
2868                         } else {
2869                                 # Remove obsolete MSG:
2870                                 $mwMsg =& MagicWord::get( 'msg' );
2871                                 $mwMsg->matchStartAndRemove( $part1 );
2872                         }
2873
2874                         # Check for RAW:
2875                         $mwRaw =& MagicWord::get( 'raw' );
2876                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
2877                                 $forceRawInterwiki = true;
2878                         }
2879                 }
2880                 wfProfileOut( __METHOD__.'-modifiers' );
2881
2882                 # Parser functions
2883                 if ( !$found ) {
2884                         wfProfileIn( __METHOD__ . '-pfunc' );
2885
2886                         $colonPos = strpos( $part1, ':' );
2887                         if ( $colonPos !== false ) {
2888                                 # Case sensitive functions
2889                                 $function = substr( $part1, 0, $colonPos );
2890                                 if ( isset( $this->mFunctionSynonyms[1][$function] ) ) {
2891                                         $function = $this->mFunctionSynonyms[1][$function];
2892                                 } else {
2893                                         # Case insensitive functions
2894                                         $function = strtolower( $function );
2895                                         if ( isset( $this->mFunctionSynonyms[0][$function] ) ) {
2896                                                 $function = $this->mFunctionSynonyms[0][$function];
2897                                         } else {
2898                                                 $function = false;
2899                                         }
2900                                 }
2901                                 if ( $function ) {
2902                                         $funcArgs = array_map( 'trim', $args );
2903                                         $funcArgs = array_merge( array( &$this, trim( substr( $part1, $colonPos + 1 ) ) ), $funcArgs );
2904                                         $result = call_user_func_array( $this->mFunctionHooks[$function], $funcArgs );
2905                                         $found = true;
2906
2907                                         // The text is usually already parsed, doesn't need triple-brace tags expanded, etc.
2908                                         //$noargs = true;
2909                                         //$noparse = true;
2910
2911                                         if ( is_array( $result ) ) {
2912                                                 if ( isset( $result[0] ) ) {
2913                                                         $text = $linestart . $result[0];
2914                                                         unset( $result[0] );
2915                                                 }
2916
2917                                                 // Extract flags into the local scope
2918                                                 // This allows callers to set flags such as nowiki, noparse, found, etc.
2919                                                 extract( $result );
2920                                         } else {
2921                                                 $text = $linestart . $result;
2922                                         }
2923                                 }
2924                         }
2925                         wfProfileOut( __METHOD__ . '-pfunc' );
2926                 }
2927
2928                 # Template table test
2929
2930                 # Did we encounter this template already? If yes, it is in the cache
2931                 # and we need to check for loops.
2932                 if ( !$found && isset( $this->mTemplates[$piece['title']] ) ) {
2933                         $found = true;
2934
2935                         # Infinite loop test
2936                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2937                                 $noparse = true;
2938                                 $noargs = true;
2939                                 $found = true;
2940                                 $text = $linestart .
2941                                         "[[$part1]]<!-- WARNING: template loop detected -->";
2942                                 wfDebug( __METHOD__.": template loop broken at '$part1'\n" );
2943                         } else {
2944                                 # set $text to cached message.
2945                                 $text = $linestart . $this->mTemplates[$piece['title']];
2946                         }
2947                 }
2948
2949                 # Load from database
2950                 $lastPathLevel = $this->mTemplatePath;
2951                 if ( !$found ) {
2952                         wfProfileIn( __METHOD__ . '-loadtpl' );
2953                         $ns = NS_TEMPLATE;
2954                         # declaring $subpage directly in the function call
2955                         # does not work correctly with references and breaks
2956                         # {{/subpage}}-style inclusions
2957                         $subpage = '';
2958                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
2959                         if ($subpage !== '') {
2960                                 $ns = $this->mTitle->getNamespace();
2961                         }
2962                         $title = Title::newFromText( $part1, $ns );
2963
2964
2965                         if ( !is_null( $title ) ) {
2966                                 $titleText = $title->getPrefixedText();
2967                                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
2968                                 # Check for language variants if the template is not found
2969                                 if($checkVariantLink && $title->getArticleID() == 0){
2970                                         $wgContLang->findVariantLink($part1, $title);
2971                                 }
2972
2973                                 if ( !$title->isExternal() ) {
2974                                         if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->ot['html'] ) {
2975                                                 $text = SpecialPage::capturePath( $title );
2976                                                 if ( is_string( $text ) ) {
2977                                                         $found = true;
2978                                                         $noparse = true;
2979                                                         $noargs = true;
2980                                                         $isHTML = true;
2981                                                         $this->disableCache();
2982                                                 }
2983                                         } else {
2984                                                 $articleContent = $this->fetchTemplate( $title );
2985                                                 if ( $articleContent !== false ) {
2986                                                         $found = true;
2987                                                         $text = $articleContent;
2988                                                         $replaceHeadings = true;
2989                                                 }
2990                                         }
2991
2992                                         # If the title is valid but undisplayable, make a link to it
2993                                         if ( !$found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
2994                                                 $text = "[[:$titleText]]";
2995                                                 $found = true;
2996                                         }
2997                                 } elseif ( $title->isTrans() ) {
2998                                         // Interwiki transclusion
2999                                         if ( $this->ot['html'] && !$forceRawInterwiki ) {
3000                                                 $text = $this->interwikiTransclude( $title, 'render' );
3001                                                 $isHTML = true;
3002                                                 $noparse = true;
3003                                         } else {
3004                                                 $text = $this->interwikiTransclude( $title, 'raw' );
3005                                                 $replaceHeadings = true;
3006                                         }
3007                                         $found = true;
3008                                 }
3009
3010                                 # Template cache array insertion
3011                                 # Use the original $piece['title'] not the mangled $part1, so that
3012                                 # modifiers such as RAW: produce separate cache entries
3013                                 if( $found ) {
3014                                         if( $isHTML ) {
3015                                                 // A special page; don't store it in the template cache.
3016                                         } else {
3017                                                 $this->mTemplates[$piece['title']] = $text;
3018                                         }
3019                                         $text = $linestart . $text;
3020                                 }
3021                         }
3022                         wfProfileOut( __METHOD__ . '-loadtpl' );
3023                 }
3024
3025                 if ( $found && !$this->incrementIncludeSize( 'pre-expand', strlen( $text ) ) ) {
3026                         # Error, oversize inclusion
3027                         $text = $linestart .
3028                                 "[[$titleText]]<!-- WARNING: template omitted, pre-expand include size too large -->";
3029                         $noparse = true;
3030                         $noargs = true;
3031                 }
3032
3033                 # Recursive parsing, escaping and link table handling
3034                 # Only for HTML output
3035                 if ( $nowiki && $found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3036                         $text = wfEscapeWikiText( $text );
3037                 } elseif ( !$this->ot['msg'] && $found ) {
3038                         if ( $noargs ) {
3039                                 $assocArgs = array();
3040                         } else {
3041                                 # Clean up argument array
3042                                 $assocArgs = array();
3043                                 $index = 1;
3044                                 foreach( $args as $arg ) {
3045                                         $eqpos = strpos( $arg, '=' );
3046                                         if ( $eqpos === false ) {
3047                                                 $assocArgs[$index++] = $arg;
3048                                         } else {
3049                                                 $name = trim( substr( $arg, 0, $eqpos ) );
3050                                                 $value = trim( substr( $arg, $eqpos+1 ) );
3051                                                 if ( $value === false ) {
3052                                                         $value = '';
3053                                                 }
3054                                                 if ( $name !== false ) {
3055                                                         $assocArgs[$name] = $value;
3056                                                 }
3057                                         }
3058                                 }
3059
3060                                 # Add a new element to the templace recursion path
3061                                 $this->mTemplatePath[$part1] = 1;
3062                         }
3063
3064                         if ( !$noparse ) {
3065                                 # If there are any <onlyinclude> tags, only include them
3066                                 if ( in_string( '<onlyinclude>', $text ) && in_string( '</onlyinclude>', $text ) ) {
3067                                         $replacer = new OnlyIncludeReplacer;
3068                                         StringUtils::delimiterReplaceCallback( '<onlyinclude>', '</onlyinclude>',
3069                                                 array( &$replacer, 'replace' ), $text );
3070                                         $text = $replacer->output;
3071                                 }
3072                                 # Remove <noinclude> sections and <includeonly> tags
3073                                 $text = StringUtils::delimiterReplace( '<noinclude>', '</noinclude>', '', $text );
3074                                 $text = strtr( $text, array( '<includeonly>' => '' , '</includeonly>' => '' ) );
3075
3076                                 if( $this->ot['html'] || $this->ot['pre'] ) {
3077                                         # Strip <nowiki>, <pre>, etc.
3078                                         $text = $this->strip( $text, $this->mStripState );
3079                                         if ( $this->ot['html'] ) {
3080                                                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'replaceVariables' ), $assocArgs );
3081                                         } elseif ( $this->ot['pre'] && $this->mOptions->getRemoveComments() ) {
3082                                                 $text = Sanitizer::removeHTMLcomments( $text );
3083                                         }
3084                                 }
3085                                 $text = $this->replaceVariables( $text, $assocArgs );
3086
3087                                 # If the template begins with a table or block-level
3088                                 # element, it should be treated as beginning a new line.
3089                                 if (!$piece['lineStart'] && preg_match('/^({\\||:|;|#|\*)/', $text)) /*}*/{
3090                                         $text = "\n" . $text;
3091                                 }
3092                         } elseif ( !$noargs ) {
3093                                 # $noparse and !$noargs
3094                                 # Just replace the arguments, not any double-brace items
3095                                 # This is used for rendered interwiki transclusion
3096                                 $text = $this->replaceVariables( $text, $assocArgs, true );
3097                         }
3098                 }
3099                 # Prune lower levels off the recursion check path
3100                 $this->mTemplatePath = $lastPathLevel;
3101
3102                 if ( $found && !$this->incrementIncludeSize( 'post-expand', strlen( $text ) ) ) {
3103                         # Error, oversize inclusion
3104                         $text = $linestart .
3105                                 "[[$titleText]]<!-- WARNING: template omitted, post-expand include size too large -->";
3106                         $noparse = true;
3107                         $noargs = true;
3108                 }
3109
3110                 if ( !$found ) {
3111                         wfProfileOut( $fname );
3112                         return $piece['text'];
3113                 } else {
3114                         wfProfileIn( __METHOD__ . '-placeholders' );
3115                         if ( $isHTML ) {
3116                                 # Replace raw HTML by a placeholder
3117                                 # Add a blank line preceding, to prevent it from mucking up
3118                                 # immediately preceding headings
3119                                 $text = "\n\n" . $this->insertStripItem( $text, $this->mStripState );
3120                         } else {
3121                                 # replace ==section headers==
3122                                 # XXX this needs to go away once we have a better parser.
3123                                 if ( !$this->ot['wiki'] && !$this->ot['pre'] && $replaceHeadings ) {
3124                                         if( !is_null( $title ) )
3125                                                 $encodedname = base64_encode($title->getPrefixedDBkey());
3126                                         else
3127                                                 $encodedname = base64_encode("");
3128                                         $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
3129                                                 PREG_SPLIT_DELIM_CAPTURE);
3130                                         $text = '';
3131                                         $nsec = 0;
3132                                         for( $i = 0; $i < count($m); $i += 2 ) {
3133                                                 $text .= $m[$i];
3134                                                 if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
3135                                                 $hl = $m[$i + 1];
3136                                                 if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
3137                                                         $text .= $hl;
3138                                                         continue;
3139                                                 }
3140                                                 $m2 = array();
3141                                                 preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
3142                                                 $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
3143                                                         . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
3144
3145                                                 $nsec++;
3146                                         }
3147                                 }
3148                         }
3149                         wfProfileOut( __METHOD__ . '-placeholders' );
3150                 }
3151
3152                 # Prune lower levels off the recursion check path
3153                 $this->mTemplatePath = $lastPathLevel;
3154
3155                 if ( !$found ) {
3156                         wfProfileOut( $fname );
3157                         return $piece['text'];
3158                 } else {
3159                         wfProfileOut( $fname );
3160                         return $text;
3161                 }
3162         }
3163
3164         /**
3165          * Fetch the unparsed text of a template and register a reference to it.
3166          */
3167         function fetchTemplate( $title ) {
3168                 $text = false;
3169                 // Loop to fetch the article, with up to 1 redirect
3170                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
3171                         $rev = Revision::newFromTitle( $title );
3172                         $this->mOutput->addTemplate( $title, $title->getArticleID() );
3173                         if ( !$rev ) {
3174                                 break;
3175                         }
3176                         $text = $rev->getText();
3177                         if ( $text === false ) {
3178                                 break;
3179                         }
3180                         // Redirect?
3181                         $title = Title::newFromRedirect( $text );
3182                 }
3183                 return $text;
3184         }
3185
3186         /**
3187          * Transclude an interwiki link.
3188          */
3189         function interwikiTransclude( $title, $action ) {
3190                 global $wgEnableScaryTranscluding, $wgCanonicalNamespaceNames;
3191
3192                 if (!$wgEnableScaryTranscluding)
3193                         return wfMsg('scarytranscludedisabled');
3194
3195                 // The namespace will actually only be 0 or 10, depending on whether there was a leading :
3196                 // But we'll handle it generally anyway
3197                 if ( $title->getNamespace() ) {
3198                         // Use the canonical namespace, which should work anywhere
3199                         $articleName = $wgCanonicalNamespaceNames[$title->getNamespace()] . ':' . $title->getDBkey();
3200                 } else {
3201                         $articleName = $title->getDBkey();
3202                 }
3203
3204                 $url = str_replace('$1', urlencode($articleName), Title::getInterwikiLink($title->getInterwiki()));
3205                 $url .= "?action=$action";
3206                 if (strlen($url) > 255)
3207                         return wfMsg('scarytranscludetoolong');
3208                 return $this->fetchScaryTemplateMaybeFromCache($url);
3209         }
3210
3211         function fetchScaryTemplateMaybeFromCache($url) {
3212                 global $wgTranscludeCacheExpiry;
3213                 $dbr =& wfGetDB(DB_SLAVE);
3214                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3215                                 array('tc_url' => $url));
3216                 if ($obj) {
3217                         $time = $obj->tc_time;
3218                         $text = $obj->tc_contents;
3219                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3220                                 return $text;
3221                         }
3222                 }
3223
3224                 $text = Http::get($url);
3225                 if (!$text)
3226                         return wfMsg('scarytranscludefailed', $url);
3227
3228                 $dbw =& wfGetDB(DB_MASTER);
3229                 $dbw->replace('transcache', array('tc_url'), array(
3230                         'tc_url' => $url,
3231                         'tc_time' => time(),
3232                         'tc_contents' => $text));
3233                 return $text;
3234         }
3235
3236
3237         /**
3238          * Triple brace replacement -- used for template arguments
3239          * @private
3240          */
3241         function argSubstitution( $matches ) {
3242                 $arg = trim( $matches['title'] );
3243                 $text = $matches['text'];
3244                 $inputArgs = end( $this->mArgStack );
3245
3246                 if ( array_key_exists( $arg, $inputArgs ) ) {
3247                         $text = $inputArgs[$arg];
3248                 } else if (($this->mOutputType == OT_HTML || $this->mOutputType == OT_PREPROCESS ) &&
3249                 null != $matches['parts'] && count($matches['parts']) > 0) {
3250                         $text = $matches['parts'][0];
3251                 }
3252                 if ( !$this->incrementIncludeSize( 'arg', strlen( $text ) ) ) {
3253                         $text = $matches['text'] .
3254                                 '<!-- WARNING: argument omitted, expansion size too large -->';
3255                 }
3256
3257                 return $text;
3258         }
3259
3260         /**
3261          * Increment an include size counter
3262          *
3263          * @param string $type The type of expansion
3264          * @param integer $size The size of the text
3265          * @return boolean False if this inclusion would take it over the maximum, true otherwise
3266          */
3267         function incrementIncludeSize( $type, $size ) {
3268                 if ( $this->mIncludeSizes[$type] + $size > $this->mOptions->getMaxIncludeSize() ) {
3269                         return false;
3270                 } else {
3271                         $this->mIncludeSizes[$type] += $size;
3272                         return true;
3273                 }
3274         }
3275
3276         /**
3277          * Detect __NOGALLERY__ magic word and set a placeholder
3278          */
3279         function stripNoGallery( &$text ) {
3280                 # if the string __NOGALLERY__ (not case-sensitive) occurs in the HTML,
3281                 # do not add TOC
3282                 $mw = MagicWord::get( 'nogallery' );
3283                 $this->mOutput->mNoGallery = $mw->matchAndRemove( $text ) ;
3284         }
3285
3286         /**
3287          * Detect __TOC__ magic word and set a placeholder
3288          */
3289         function stripToc( $text ) {
3290                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
3291                 # do not add TOC
3292                 $mw = MagicWord::get( 'notoc' );
3293                 if( $mw->matchAndRemove( $text ) ) {
3294                         $this->mShowToc = false;
3295                 }
3296
3297                 $mw = MagicWord::get( 'toc' );
3298                 if( $mw->match( $text ) ) {
3299                         $this->mShowToc = true;
3300                         $this->mForceTocPosition = true;
3301
3302                         // Set a placeholder. At the end we'll fill it in with the TOC.
3303                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3304
3305                         // Only keep the first one.
3306                         $text = $mw->replace( '', $text );
3307                 }
3308                 return $text;
3309         }
3310
3311         /**
3312          * This function accomplishes several tasks:
3313          * 1) Auto-number headings if that option is enabled
3314          * 2) Add an [edit] link to sections for logged in users who have enabled the option
3315          * 3) Add a Table of contents on the top for users who have enabled the option
3316          * 4) Auto-anchor headings
3317          *
3318          * It loops through all headlines, collects the necessary data, then splits up the
3319          * string and re-inserts the newly formatted headlines.
3320          *
3321          * @param string $text
3322          * @param boolean $isMain
3323          * @private
3324          */
3325         function formatHeadings( $text, $isMain=true ) {
3326                 global $wgMaxTocLevel, $wgContLang;
3327
3328                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3329                 if( !$this->mTitle->userCanEdit() ) {
3330                         $showEditLink = 0;
3331                 } else {
3332                         $showEditLink = $this->mOptions->getEditSection();
3333                 }
3334
3335                 # Inhibit editsection links if requested in the page
3336                 $esw =& MagicWord::get( 'noeditsection' );
3337                 if( $esw->matchAndRemove( $text ) ) {
3338                         $showEditLink = 0;
3339                 }
3340
3341                 # Get all headlines for numbering them and adding funky stuff like [edit]
3342                 # links - this is for later, but we need the number of headlines right now
3343                 $matches = array();
3344                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
3345
3346                 # if there are fewer than 4 headlines in the article, do not show TOC
3347                 # unless it's been explicitly enabled.
3348                 $enoughToc = $this->mShowToc &&
3349                         (($numMatches >= 4) || $this->mForceTocPosition);
3350
3351                 # Allow user to stipulate that a page should have a "new section"
3352                 # link added via __NEWSECTIONLINK__
3353                 $mw =& MagicWord::get( 'newsectionlink' );
3354                 if( $mw->matchAndRemove( $text ) )
3355                         $this->mOutput->setNewSection( true );
3356
3357                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
3358                 # override above conditions and always show TOC above first header
3359                 $mw =& MagicWord::get( 'forcetoc' );
3360                 if ($mw->matchAndRemove( $text ) ) {
3361                         $this->mShowToc = true;
3362                         $enoughToc = true;
3363                 }
3364
3365                 # Never ever show TOC if no headers
3366                 if( $numMatches < 1 ) {
3367                         $enoughToc = false;
3368                 }
3369
3370                 # We need this to perform operations on the HTML
3371                 $sk =& $this->mOptions->getSkin();
3372
3373                 # headline counter
3374                 $headlineCount = 0;
3375                 $sectionCount = 0; # headlineCount excluding template sections
3376
3377                 # Ugh .. the TOC should have neat indentation levels which can be
3378                 # passed to the skin functions. These are determined here
3379                 $toc = '';
3380                 $full = '';
3381                 $head = array();
3382                 $sublevelCount = array();
3383                 $levelCount = array();
3384                 $toclevel = 0;
3385                 $level = 0;
3386                 $prevlevel = 0;
3387                 $toclevel = 0;
3388                 $prevtoclevel = 0;
3389
3390                 foreach( $matches[3] as $headline ) {
3391                         $istemplate = 0;
3392                         $templatetitle = '';
3393                         $templatesection = 0;
3394                         $numbering = '';
3395                         $mat = array();
3396                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
3397                                 $istemplate = 1;
3398                                 $templatetitle = base64_decode($mat[1]);
3399                                 $templatesection = 1 + (int)base64_decode($mat[2]);
3400                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
3401                         }
3402
3403                         if( $toclevel ) {
3404                                 $prevlevel = $level;
3405                                 $prevtoclevel = $toclevel;
3406                         }
3407                         $level = $matches[1][$headlineCount];
3408
3409                         if( $doNumberHeadings || $enoughToc ) {
3410
3411                                 if ( $level > $prevlevel ) {
3412                                         # Increase TOC level
3413                                         $toclevel++;
3414                                         $sublevelCount[$toclevel] = 0;
3415                                         if( $toclevel<$wgMaxTocLevel ) {
3416                                                 $toc .= $sk->tocIndent();
3417                                         }
3418                                 }
3419                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3420                                         # Decrease TOC level, find level to jump to
3421
3422                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3423                                                 # Can only go down to level 1
3424                                                 $toclevel = 1;
3425                                         } else {
3426                                                 for ($i = $toclevel; $i > 0; $i--) {
3427                                                         if ( $levelCount[$i] == $level ) {
3428                                                                 # Found last matching level
3429                                                                 $toclevel = $i;
3430                                                                 break;
3431                                                         }
3432                                                         elseif ( $levelCount[$i] < $level ) {
3433                                                                 # Found first matching level below current level
3434                                                                 $toclevel = $i + 1;
3435                                                                 break;
3436                                                         }
3437                                                 }
3438                                         }
3439                                         if( $toclevel<$wgMaxTocLevel ) {
3440                                                 $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
3441                                         }
3442                                 }
3443                                 else {
3444                                         # No change in level, end TOC line
3445                                         if( $toclevel<$wgMaxTocLevel ) {
3446                                                 $toc .= $sk->tocLineEnd();
3447                                         }
3448                                 }
3449
3450                                 $levelCount[$toclevel] = $level;
3451
3452                                 # count number of headlines for each level
3453                                 @$sublevelCount[$toclevel]++;
3454                                 $dot = 0;
3455                                 for( $i = 1; $i <= $toclevel; $i++ ) {
3456                                         if( !empty( $sublevelCount[$i] ) ) {
3457                                                 if( $dot ) {
3458                                                         $numbering .= '.';
3459                                                 }
3460                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
3461                                                 $dot = 1;
3462                                         }
3463                                 }
3464                         }
3465
3466                         # The canonized header is a version of the header text safe to use for links
3467                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
3468                         $canonized_headline = $this->mStripState->unstripBoth( $headline );
3469
3470                         # Remove link placeholders by the link text.
3471                         #     <!--LINK number-->
3472                         # turns into
3473                         #     link text with suffix
3474                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
3475                                                             "\$this->mLinkHolders['texts'][\$1]",
3476                                                             $canonized_headline );
3477                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
3478                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
3479                                                             $canonized_headline );
3480
3481                         # strip out HTML
3482                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
3483                         $tocline = trim( $canonized_headline );
3484                         # Save headline for section edit hint before it's escaped
3485                         $headline_hint = trim( $canonized_headline );
3486                         $canonized_headline = Sanitizer::escapeId( $tocline );
3487                         $refers[$headlineCount] = $canonized_headline;
3488
3489                         # count how many in assoc. array so we can track dupes in anchors
3490                         @$refers[$canonized_headline]++;
3491                         $refcount[$headlineCount]=$refers[$canonized_headline];
3492
3493                         # Don't number the heading if it is the only one (looks silly)
3494                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3495                                 # the two are different if the line contains a link
3496                                 $headline=$numbering . ' ' . $headline;
3497                         }
3498
3499                         # Create the anchor for linking from the TOC to the section
3500                         $anchor = $canonized_headline;
3501                         if($refcount[$headlineCount] > 1 ) {
3502                                 $anchor .= '_' . $refcount[$headlineCount];
3503                         }
3504                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3505                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3506                         }
3507                         # give headline the correct <h#> tag
3508                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount];
3509
3510                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
3511                                 if ( empty( $head[$headlineCount] ) ) {
3512                                         $head[$headlineCount] = '';
3513                                 }
3514                                 if( $istemplate )
3515                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
3516                                 else
3517                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1, $headline_hint);
3518                         }
3519                         // Yes, the headline logically goes before the edit section.  Why isn't it there
3520                         // in source?  Ask the CSS people.  The float gets screwed up if you do that.
3521                         // This might be moved to before the editsection at some point so that it will
3522                         // display a bit more prettily without CSS, so please don't rely on the order.
3523                         $head[$headlineCount] .= ' <span class="mw-headline">'.$headline.'</span></h'.$level.'>';
3524
3525                         $headlineCount++;
3526                         if( !$istemplate )
3527                                 $sectionCount++;
3528                 }
3529
3530                 if( $enoughToc ) {
3531                         if( $toclevel<$wgMaxTocLevel ) {
3532                                 $toc .= $sk->tocUnindent( $toclevel - 1 );
3533                         }
3534                         $toc = $sk->tocList( $toc );
3535                 }
3536
3537                 # split up and insert constructed headlines
3538
3539                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
3540                 $i = 0;
3541
3542                 foreach( $blocks as $block ) {
3543                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
3544                                 # This is the [edit] link that appears for the top block of text when
3545                                 # section editing is enabled
3546
3547                                 # Disabled because it broke block formatting
3548                                 # For example, a bullet point in the top line
3549                                 # $full .= $sk->editSectionLink(0);
3550                         }
3551                         $full .= $block;
3552                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
3553                                 # Top anchor now in skin
3554                                 $full = $full.$toc;
3555                         }
3556
3557                         if( !empty( $head[$i] ) ) {
3558                                 $full .= $head[$i];
3559                         }
3560                         $i++;
3561                 }
3562                 if( $this->mForceTocPosition ) {
3563                         return str_replace( '<!--MWTOC-->', $toc, $full );
3564                 } else {
3565                         return $full;
3566                 }
3567         }
3568
3569         /**
3570          * Transform wiki markup when saving a page by doing \r\n -> \n
3571          * conversion, substitting signatures, {{subst:}} templates, etc.
3572          *
3573          * @param string $text the text to transform
3574          * @param Title &$title the Title object for the current article
3575          * @param User &$user the User object describing the current user
3576          * @param ParserOptions $options parsing options
3577          * @param bool $clearState whether to clear the parser state first
3578          * @return string the altered wiki markup
3579          * @public
3580          */
3581         function preSaveTransform( $text, &$title, $user, $options, $clearState = true ) {
3582                 $this->mOptions = $options;
3583                 $this->mTitle =& $title;
3584                 $this->setOutputType( OT_WIKI );
3585
3586                 if ( $clearState ) {
3587                         $this->clearState();
3588                 }
3589
3590                 $stripState = new StripState;
3591                 $pairs = array(
3592                         "\r\n" => "\n",
3593                 );
3594                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
3595                 $text = $this->strip( $text, $stripState, true, array( 'gallery' ) );
3596                 $text = $this->pstPass2( $text, $stripState, $user );
3597                 $text = $stripState->unstripBoth( $text );
3598                 return $text;
3599         }
3600
3601         /**
3602          * Pre-save transform helper function
3603          * @private
3604          */
3605         function pstPass2( $text, &$stripState, $user ) {
3606                 global $wgContLang, $wgLocaltimezone;
3607
3608                 /* Note: This is the timestamp saved as hardcoded wikitext to
3609                  * the database, we use $wgContLang here in order to give
3610                  * everyone the same signature and use the default one rather
3611                  * than the one selected in each user's preferences.
3612                  */
3613                 if ( isset( $wgLocaltimezone ) ) {
3614                         $oldtz = getenv( 'TZ' );
3615                         putenv( 'TZ='.$wgLocaltimezone );
3616                 }
3617                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
3618                   ' (' . date( 'T' ) . ')';
3619                 if ( isset( $wgLocaltimezone ) ) {
3620                         putenv( 'TZ='.$oldtz );
3621                 }
3622
3623                 # Variable replacement
3624                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
3625                 $text = $this->replaceVariables( $text );
3626
3627                 # Strip out <nowiki> etc. added via replaceVariables
3628                 $text = $this->strip( $text, $stripState, false, array( 'gallery' ) );
3629
3630                 # Signatures
3631                 $sigText = $this->getUserSig( $user );
3632                 $text = strtr( $text, array(
3633                         '~~~~~' => $d,
3634                         '~~~~' => "$sigText $d",
3635                         '~~~' => $sigText
3636                 ) );
3637
3638                 # Context links: [[|name]] and [[name (context)|]]
3639                 #
3640                 global $wgLegalTitleChars;
3641                 $tc = "[$wgLegalTitleChars]";
3642                 $nc = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
3643
3644                 $p1 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\))\\|]]/";            # [[ns:page (context)|]]
3645                 $p3 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\)|)(, $tc+|)\\|]]/";  # [[ns:page (context), context|]]
3646                 $p2 = "/\[\[\\|($tc+)]]/";                                      # [[|page]]
3647
3648                 # try $p1 first, to turn "[[A, B (C)|]]" into "[[A, B (C)|A, B]]"
3649                 $text = preg_replace( $p1, '[[\\1\\2\\3|\\2]]', $text );
3650                 $text = preg_replace( $p3, '[[\\1\\2\\3\\4|\\2]]', $text );
3651
3652                 $t = $this->mTitle->getText();
3653                 $m = array();
3654                 if ( preg_match( "/^($nc+:|)$tc+?( \\($tc+\\))$/", $t, $m ) ) {
3655                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3656                 } elseif ( preg_match( "/^($nc+:|)$tc+?(, $tc+|)$/", $t, $m ) && '' != "$m[1]$m[2]" ) {
3657                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3658                 } else {
3659                         # if there's no context, don't bother duplicating the title
3660                         $text = preg_replace( $p2, '[[\\1]]', $text );
3661                 }
3662
3663                 # Trim trailing whitespace
3664                 # __END__ tag allows for trailing
3665                 # whitespace to be deliberately included
3666                 $text = rtrim( $text );
3667                 $mw =& MagicWord::get( 'end' );
3668                 $mw->matchAndRemove( $text );
3669
3670                 return $text;
3671         }
3672
3673         /**
3674          * Fetch the user's signature text, if any, and normalize to
3675          * validated, ready-to-insert wikitext.
3676          *
3677          * @param User $user
3678          * @return string
3679          * @private
3680          */
3681         function getUserSig( &$user ) {
3682                 $username = $user->getName();
3683                 $nickname = $user->getOption( 'nickname' );
3684                 $nickname = $nickname === '' ? $username : $nickname;
3685
3686                 if( $user->getBoolOption( 'fancysig' ) !== false ) {
3687                         # Sig. might contain markup; validate this
3688                         if( $this->validateSig( $nickname ) !== false ) {
3689                                 # Validated; clean up (if needed) and return it
3690                                 return $this->cleanSig( $nickname, true );
3691                         } else {
3692                                 # Failed to validate; fall back to the default
3693                                 $nickname = $username;
3694                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
3695                         }
3696                 }
3697
3698                 // Make sure nickname doesnt get a sig in a sig
3699                 $nickname = $this->cleanSigInSig( $nickname );
3700
3701                 # If we're still here, make it a link to the user page
3702                 $userpage = $user->getUserPage();
3703                 return( '[[' . $userpage->getPrefixedText() . '|' . wfEscapeWikiText( $nickname ) . ']]' );
3704         }
3705
3706         /**
3707          * Check that the user's signature contains no bad XML
3708          *
3709          * @param string $text
3710          * @return mixed An expanded string, or false if invalid.
3711          */
3712         function validateSig( $text ) {
3713                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
3714         }
3715
3716         /**
3717          * Clean up signature text
3718          *
3719          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures @see cleanSigInSig
3720          * 2) Substitute all transclusions
3721          *
3722          * @param string $text
3723          * @param $parsing Whether we're cleaning (preferences save) or parsing
3724          * @return string Signature text
3725          */
3726         function cleanSig( $text, $parsing = false ) {
3727                 global $wgTitle;
3728                 $this->startExternalParse( $wgTitle, new ParserOptions(), $parsing ? OT_WIKI : OT_MSG );
3729
3730                 $substWord = MagicWord::get( 'subst' );
3731                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
3732                 $substText = '{{' . $substWord->getSynonym( 0 );
3733
3734                 $text = preg_replace( $substRegex, $substText, $text );
3735                 $text = $this->cleanSigInSig( $text );
3736                 $text = $this->replaceVariables( $text );
3737
3738                 $this->clearState();
3739                 return $text;
3740         }
3741
3742         /**
3743          * Strip ~~~, ~~~~ and ~~~~~ out of signatures
3744          * @param string $text
3745          * @return string Signature text with /~{3,5}/ removed
3746          */
3747         function cleanSigInSig( $text ) {
3748                 $text = preg_replace( '/~{3,5}/', '', $text );
3749                 return $text;
3750         }
3751
3752         /**
3753          * Set up some variables which are usually set up in parse()
3754          * so that an external function can call some class members with confidence
3755          * @public
3756          */
3757         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
3758                 $this->mTitle =& $title;
3759                 $this->mOptions = $options;
3760                 $this->setOutputType( $outputType );
3761                 if ( $clearState ) {
3762                         $this->clearState();
3763                 }
3764         }
3765
3766         /**
3767          * Transform a MediaWiki message by replacing magic variables.
3768          *
3769          * @param string $text the text to transform
3770          * @param ParserOptions $options  options
3771          * @return string the text with variables substituted
3772          * @public
3773          */
3774         function transformMsg( $text, $options ) {
3775                 global $wgTitle;
3776                 static $executing = false;
3777
3778                 $fname = "Parser::transformMsg";
3779
3780                 # Guard against infinite recursion
3781                 if ( $executing ) {
3782                         return $text;
3783                 }
3784                 $executing = true;
3785
3786                 wfProfileIn($fname);
3787
3788                 if ( $wgTitle ) {
3789                         $this->mTitle = $wgTitle;
3790                 } else {
3791                         $this->mTitle = Title::newFromText('msg');
3792                 }
3793                 $this->mOptions = $options;
3794                 $this->setOutputType( OT_MSG );
3795                 $this->clearState();
3796                 $text = $this->replaceVariables( $text );
3797
3798                 $executing = false;
3799                 wfProfileOut($fname);
3800                 return $text;
3801         }
3802
3803         /**
3804          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
3805          * The callback should have the following form:
3806          *    function myParserHook( $text, $params, &$parser ) { ... }
3807          *
3808          * Transform and return $text. Use $parser for any required context, e.g. use
3809          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
3810          *
3811          * @public
3812          *
3813          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
3814          * @param mixed $callback The callback function (and object) to use for the tag
3815          *
3816          * @return The old value of the mTagHooks array associated with the hook
3817          */
3818         function setHook( $tag, $callback ) {
3819                 $tag = strtolower( $tag );
3820                 $oldVal = @$this->mTagHooks[$tag];
3821                 $this->mTagHooks[$tag] = $callback;
3822
3823                 return $oldVal;
3824         }
3825
3826         /**
3827          * Create a function, e.g. {{sum:1|2|3}}
3828          * The callback function should have the form:
3829          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
3830          *
3831          * The callback may either return the text result of the function, or an array with the text
3832          * in element 0, and a number of flags in the other elements. The names of the flags are
3833          * specified in the keys. Valid flags are:
3834          *   found                     The text returned is valid, stop processing the template. This
3835          *                             is on by default.
3836          *   nowiki                    Wiki markup in the return value should be escaped
3837          *   noparse                   Unsafe HTML tags should not be stripped, etc.
3838          *   noargs                    Don't replace triple-brace arguments in the return value
3839          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
3840          *
3841          * @public
3842          *
3843          * @param string $id The magic word ID
3844          * @param mixed $callback The callback function (and object) to use
3845          * @param integer $flags a combination of the following flags:
3846          *                SFH_NO_HASH No leading hash, i.e. {{plural:...}} instead of {{#if:...}}
3847          *
3848          * @return The old callback function for this name, if any
3849          */
3850         function setFunctionHook( $id, $callback, $flags = 0 ) {
3851                 $oldVal = @$this->mFunctionHooks[$id];
3852                 $this->mFunctionHooks[$id] = $callback;
3853
3854                 # Add to function cache
3855                 $mw = MagicWord::get( $id );
3856                 if( !$mw )
3857                         throw new MWException( 'Parser::setFunctionHook() expecting a magic word identifier.' );
3858
3859                 $synonyms = $mw->getSynonyms();
3860                 $sensitive = intval( $mw->isCaseSensitive() );
3861
3862                 foreach ( $synonyms as $syn ) {
3863                         # Case
3864                         if ( !$sensitive ) {
3865                                 $syn = strtolower( $syn );
3866                         }
3867                         # Add leading hash
3868                         if ( !( $flags & SFH_NO_HASH ) ) {
3869                                 $syn = '#' . $syn;
3870                         }
3871                         # Remove trailing colon
3872                         if ( substr( $syn, -1, 1 ) == ':' ) {
3873                                 $syn = substr( $syn, 0, -1 );
3874                         }
3875                         $this->mFunctionSynonyms[$sensitive][$syn] = $id;
3876                 }
3877                 return $oldVal;
3878         }
3879
3880         /**
3881          * Get all registered function hook identifiers
3882          *
3883          * @return array
3884          */
3885         function getFunctionHooks() {
3886                 return array_keys( $this->mFunctionHooks );
3887         }
3888
3889         /**
3890          * Replace <!--LINK--> link placeholders with actual links, in the buffer
3891          * Placeholders created in Skin::makeLinkObj()
3892          * Returns an array of links found, indexed by PDBK:
3893          *  0 - broken
3894          *  1 - normal link
3895          *  2 - stub
3896          * $options is a bit field, RLH_FOR_UPDATE to select for update
3897          */
3898         function replaceLinkHolders( &$text, $options = 0 ) {
3899                 global $wgUser;
3900                 global $wgContLang;
3901
3902                 $fname = 'Parser::replaceLinkHolders';
3903                 wfProfileIn( $fname );
3904
3905                 $pdbks = array();
3906                 $colours = array();
3907                 $sk =& $this->mOptions->getSkin();
3908                 $linkCache =& LinkCache::singleton();
3909
3910                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
3911                         wfProfileIn( $fname.'-check' );
3912                         $dbr =& wfGetDB( DB_SLAVE );
3913                         $page = $dbr->tableName( 'page' );
3914                         $threshold = $wgUser->getOption('stubthreshold');
3915
3916                         # Sort by namespace
3917                         asort( $this->mLinkHolders['namespaces'] );
3918
3919                         # Generate query
3920                         $query = false;
3921                         $current = null;
3922                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3923                                 # Make title object
3924                                 $title = $this->mLinkHolders['titles'][$key];
3925
3926                                 # Skip invalid entries.
3927                                 # Result will be ugly, but prevents crash.
3928                                 if ( is_null( $title ) ) {
3929                                         continue;
3930                                 }
3931                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
3932
3933                                 # Check if it's a static known link, e.g. interwiki
3934                                 if ( $title->isAlwaysKnown() ) {
3935                                         $colours[$pdbk] = 1;
3936                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
3937                                         $colours[$pdbk] = 1;
3938                                         $this->mOutput->addLink( $title, $id );
3939                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
3940                                         $colours[$pdbk] = 0;
3941                                 } else {
3942                                         # Not in the link cache, add it to the query
3943                                         if ( !isset( $current ) ) {
3944                                                 $current = $ns;
3945                                                 $query =  "SELECT page_id, page_namespace, page_title";
3946                                                 if ( $threshold > 0 ) {
3947                                                         $query .= ', page_len, page_is_redirect';
3948                                                 }
3949                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
3950                                         } elseif ( $current != $ns ) {
3951                                                 $current = $ns;
3952                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
3953                                         } else {
3954                                                 $query .= ', ';
3955                                         }
3956
3957                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
3958                                 }
3959                         }
3960                         if ( $query ) {
3961                                 $query .= '))';
3962                                 if ( $options & RLH_FOR_UPDATE ) {
3963                                         $query .= ' FOR UPDATE';
3964                                 }
3965
3966                                 $res = $dbr->query( $query, $fname );
3967
3968                                 # Fetch data and form into an associative array
3969                                 # non-existent = broken
3970                                 # 1 = known
3971                                 # 2 = stub
3972                                 while ( $s = $dbr->fetchObject($res) ) {
3973                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
3974                                         $pdbk = $title->getPrefixedDBkey();
3975                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
3976                                         $this->mOutput->addLink( $title, $s->page_id );
3977
3978                                         if ( $threshold >  0 ) {
3979                                                 $size = $s->page_len;
3980                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
3981                                                         $colours[$pdbk] = 1;
3982                                                 } else {
3983                                                         $colours[$pdbk] = 2;
3984                                                 }
3985                                         } else {
3986                                                 $colours[$pdbk] = 1;
3987                                         }
3988                                 }
3989                         }
3990                         wfProfileOut( $fname.'-check' );
3991
3992                         # Do a second query for different language variants of links (if needed)
3993                         if($wgContLang->hasVariants()){
3994                                 $linkBatch = new LinkBatch();
3995                                 $variantMap = array(); // maps $pdbkey_Variant => $pdbkey_original
3996
3997                                 // Add variants of links to link batch
3998                                 foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3999                                         $title = $this->mLinkHolders['titles'][$key];
4000                                         if ( is_null( $title ) )
4001                                                 continue;
4002
4003                                         $pdbk = $title->getPrefixedDBkey();
4004
4005                                         // generate all variants of the link title text
4006                                         $allTextVariants = $wgContLang->convertLinkToAllVariants($title->getText());
4007
4008                                         // if link was not found (in first query), add all variants to query
4009                                         if ( !isset($colours[$pdbk]) ){
4010                                                 foreach($allTextVariants as $textVariant){
4011                                                         $variantTitle = Title::makeTitle( $ns, $textVariant );
4012                                                         if(is_null($variantTitle)) continue;
4013                                                         $linkBatch->addObj( $variantTitle );
4014                                                         $variantMap[$variantTitle->getPrefixedDBkey()][] = $key;
4015                                                 }
4016                                         }
4017                                 }
4018
4019
4020                                 if(!$linkBatch->isEmpty()){
4021                                         // construct query
4022                                         $titleClause = $linkBatch->constructSet('page', $dbr);
4023
4024                                         $variantQuery =  "SELECT page_id, page_namespace, page_title";
4025                                         if ( $threshold > 0 ) {
4026                                                 $variantQuery .= ', page_len, page_is_redirect';
4027                                         }
4028
4029                                         $variantQuery .= " FROM $page WHERE $titleClause";
4030                                         if ( $options & RLH_FOR_UPDATE ) {
4031                                                 $variantQuery .= ' FOR UPDATE';
4032                                         }
4033
4034                                         $varRes = $dbr->query( $variantQuery, $fname );
4035
4036                                         // for each found variants, figure out link holders and replace
4037                                         while ( $s = $dbr->fetchObject($varRes) ) {
4038
4039                                                 $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title );
4040                                                 $varPdbk = $variantTitle->getPrefixedDBkey();
4041                                                 $linkCache->addGoodLinkObj( $s->page_id, $variantTitle );
4042                                                 $this->mOutput->addLink( $variantTitle, $s->page_id );
4043
4044                                                 $holderKeys = $variantMap[$varPdbk];
4045
4046                                                 // loop over link holders
4047                                                 foreach($holderKeys as $key){
4048                                                         $title = $this->mLinkHolders['titles'][$key];
4049                                                         if ( is_null( $title ) ) continue;
4050
4051                                                         $pdbk = $title->getPrefixedDBkey();
4052
4053                                                         if(!isset($colours[$pdbk])){
4054                                                                 // found link in some of the variants, replace the link holder data
4055                                                                 $this->mLinkHolders['titles'][$key] = $variantTitle;
4056                                                                 $this->mLinkHolders['dbkeys'][$key] = $variantTitle->getDBkey();
4057
4058                                                                 // set pdbk and colour
4059                                                                 $pdbks[$key] = $varPdbk;
4060                                                                 if ( $threshold >  0 ) {
4061                                                                         $size = $s->page_len;
4062                                                                         if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
4063                                                                                 $colours[$varPdbk] = 1;
4064                                                                         } else {
4065                                                                                 $colours[$varPdbk] = 2;
4066                                                                         }
4067                                                                 }
4068                                                                 else {
4069                                                                         $colours[$varPdbk] = 1;
4070                                                                 }
4071                                                         }
4072                                                 }
4073                                         }
4074                                 }
4075                         }
4076
4077                         # Construct search and replace arrays
4078                         wfProfileIn( $fname.'-construct' );
4079                         $replacePairs = array();
4080                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4081                                 $pdbk = $pdbks[$key];
4082                                 $searchkey = "<!--LINK $key-->";
4083                                 $title = $this->mLinkHolders['titles'][$key];
4084                                 if ( empty( $colours[$pdbk] ) ) {
4085                                         $linkCache->addBadLinkObj( $title );
4086                                         $colours[$pdbk] = 0;
4087                                         $this->mOutput->addLink( $title, 0 );
4088                                         $replacePairs[$searchkey] = $sk->makeBrokenLinkObj( $title,
4089                                                                         $this->mLinkHolders['texts'][$key],
4090                                                                         $this->mLinkHolders['queries'][$key] );
4091                                 } elseif ( $colours[$pdbk] == 1 ) {
4092                                         $replacePairs[$searchkey] = $sk->makeKnownLinkObj( $title,
4093                                                                         $this->mLinkHolders['texts'][$key],
4094                                                                         $this->mLinkHolders['queries'][$key] );
4095                                 } elseif ( $colours[$pdbk] == 2 ) {
4096                                         $replacePairs[$searchkey] = $sk->makeStubLinkObj( $title,
4097                                                                         $this->mLinkHolders['texts'][$key],
4098                                                                         $this->mLinkHolders['queries'][$key] );
4099                                 }
4100                         }
4101                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4102                         wfProfileOut( $fname.'-construct' );
4103
4104                         # Do the thing
4105                         wfProfileIn( $fname.'-replace' );
4106                         $text = preg_replace_callback(
4107                                 '/(<!--LINK .*?-->)/',
4108                                 $replacer->cb(),
4109                                 $text);
4110
4111                         wfProfileOut( $fname.'-replace' );
4112                 }
4113
4114                 # Now process interwiki link holders
4115                 # This is quite a bit simpler than internal links
4116                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
4117                         wfProfileIn( $fname.'-interwiki' );
4118                         # Make interwiki link HTML
4119                         $replacePairs = array();
4120                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
4121                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
4122                                 $replacePairs[$key] = $sk->makeLinkObj( $title, $link );
4123                         }
4124                         $replacer = new HashtableReplacer( $replacePairs, 1 );
4125
4126                         $text = preg_replace_callback(
4127                                 '/<!--IWLINK (.*?)-->/',
4128                                 $replacer->cb(),
4129                                 $text );
4130                         wfProfileOut( $fname.'-interwiki' );
4131                 }
4132
4133                 wfProfileOut( $fname );
4134                 return $colours;
4135         }
4136
4137         /**
4138          * Replace <!--LINK--> link placeholders with plain text of links
4139          * (not HTML-formatted).
4140          * @param string $text
4141          * @return string
4142          */
4143         function replaceLinkHoldersText( $text ) {
4144                 $fname = 'Parser::replaceLinkHoldersText';
4145                 wfProfileIn( $fname );
4146
4147                 $text = preg_replace_callback(
4148                         '/<!--(LINK|IWLINK) (.*?)-->/',
4149                         array( &$this, 'replaceLinkHoldersTextCallback' ),
4150                         $text );
4151
4152                 wfProfileOut( $fname );
4153                 return $text;
4154         }
4155
4156         /**
4157          * @param array $matches
4158          * @return string
4159          * @private
4160          */
4161         function replaceLinkHoldersTextCallback( $matches ) {
4162                 $type = $matches[1];
4163                 $key  = $matches[2];
4164                 if( $type == 'LINK' ) {
4165                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
4166                                 return $this->mLinkHolders['texts'][$key];
4167                         }
4168                 } elseif( $type == 'IWLINK' ) {
4169                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
4170                                 return $this->mInterwikiLinkHolders['texts'][$key];
4171                         }
4172                 }
4173                 return $matches[0];
4174         }
4175
4176         /**
4177          * Tag hook handler for 'pre'.
4178          */
4179         function renderPreTag( $text, $attribs ) {
4180                 // Backwards-compatibility hack
4181                 $content = StringUtils::delimiterReplace( '<nowiki>', '</nowiki>', '$1', $text, 'i' );
4182
4183                 $attribs = Sanitizer::validateTagAttributes( $attribs, 'pre' );
4184                 return wfOpenElement( 'pre', $attribs ) .
4185                         Xml::escapeTagsOnly( $content ) .
4186                         '</pre>';
4187         }
4188
4189         /**
4190          * Renders an image gallery from a text with one line per image.
4191          * text labels may be given by using |-style alternative text. E.g.
4192          *   Image:one.jpg|The number "1"
4193          *   Image:tree.jpg|A tree
4194          * given as text will return the HTML of a gallery with two images,
4195          * labeled 'The number "1"' and
4196          * 'A tree'.
4197          */
4198         function renderImageGallery( $text, $params ) {
4199                 $ig = new ImageGallery();
4200                 $ig->setShowBytes( false );
4201                 $ig->setShowFilename( false );
4202                 $ig->setParsing();
4203                 $ig->useSkin( $this->mOptions->getSkin() );
4204
4205                 if( isset( $params['caption'] ) )
4206                         $ig->setCaption( $params['caption'] );
4207
4208                 $lines = explode( "\n", $text );
4209                 foreach ( $lines as $line ) {
4210                         # match lines like these:
4211                         # Image:someimage.jpg|This is some image
4212                         $matches = array();
4213                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
4214                         # Skip empty lines
4215                         if ( count( $matches ) == 0 ) {
4216                                 continue;
4217                         }
4218                         $tp = Title::newFromText( $matches[1] );
4219                         $nt =& $tp;
4220                         if( is_null( $nt ) ) {
4221                                 # Bogus title. Ignore these so we don't bomb out later.
4222                                 continue;
4223                         }
4224                         if ( isset( $matches[3] ) ) {
4225                                 $label = $matches[3];
4226                         } else {
4227                                 $label = '';
4228                         }
4229
4230                         $pout = $this->parse( $label,
4231                                 $this->mTitle,
4232                                 $this->mOptions,
4233                                 false, // Strip whitespace...?
4234                                 false  // Don't clear state!
4235                         );
4236                         $html = $pout->getText();
4237
4238                         $ig->add( new Image( $nt ), $html );
4239
4240                         # Only add real images (bug #5586)
4241                         if ( $nt->getNamespace() == NS_IMAGE ) {
4242                                 $this->mOutput->addImage( $nt->getDBkey() );
4243                         }
4244                 }
4245                 return $ig->toHTML();
4246         }
4247
4248         /**
4249          * Parse image options text and use it to make an image
4250          */
4251         function makeImage( $nt, $options ) {
4252                 global $wgUseImageResize, $wgDjvuRenderer;
4253
4254                 $align = '';
4255
4256                 # Check if the options text is of the form "options|alt text"
4257                 # Options are:
4258                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4259                 #  * left               no resizing, just left align. label is used for alt= only
4260                 #  * right              same, but right aligned
4261                 #  * none               same, but not aligned
4262                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4263                 #  * center             center the image
4264                 #  * framed             Keep original image size, no magnify-button.
4265
4266                 $part = explode( '|', $options);
4267
4268                 $mwThumb  =& MagicWord::get( 'img_thumbnail' );
4269                 $mwManualThumb =& MagicWord::get( 'img_manualthumb' );
4270                 $mwLeft   =& MagicWord::get( 'img_left' );
4271                 $mwRight  =& MagicWord::get( 'img_right' );
4272                 $mwNone   =& MagicWord::get( 'img_none' );
4273                 $mwWidth  =& MagicWord::get( 'img_width' );
4274                 $mwCenter =& MagicWord::get( 'img_center' );
4275                 $mwFramed =& MagicWord::get( 'img_framed' );
4276                 $mwPage   =& MagicWord::get( 'img_page' );
4277                 $caption = '';
4278
4279                 $width = $height = $framed = $thumb = false;
4280                 $page = null;
4281                 $manual_thumb = '' ;
4282
4283                 foreach( $part as $val ) {
4284                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
4285                                 $thumb=true;
4286                         } elseif ( ! is_null( $match = $mwManualThumb->matchVariableStartToEnd($val) ) ) {
4287                                 # use manually specified thumbnail
4288                                 $thumb=true;
4289                                 $manual_thumb = $match;
4290                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
4291                                 # remember to set an alignment, don't render immediately
4292                                 $align = 'right';
4293                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
4294                                 # remember to set an alignment, don't render immediately
4295                                 $align = 'left';
4296                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
4297                                 # remember to set an alignment, don't render immediately
4298                                 $align = 'center';
4299                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
4300                                 # remember to set an alignment, don't render immediately
4301                                 $align = 'none';
4302                         } elseif ( isset( $wgDjvuRenderer ) && $wgDjvuRenderer
4303                                    && ! is_null( $match = $mwPage->matchVariableStartToEnd($val) ) ) {
4304                                 # Select a page in a multipage document
4305                                 $page = $match;
4306                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
4307                                 wfDebug( "img_width match: $match\n" );
4308                                 # $match is the image width in pixels
4309                                 $m = array();
4310                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
4311                                         $width = intval( $m[1] );
4312                                         $height = intval( $m[2] );
4313                                 } else {
4314                                         $width = intval($match);
4315                                 }
4316                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
4317                                 $framed=true;
4318                         } else {
4319                                 $caption = $val;
4320                         }
4321                 }
4322                 # Strip bad stuff out of the alt text
4323                 $alt = $this->replaceLinkHoldersText( $caption );
4324
4325                 # make sure there are no placeholders in thumbnail attributes
4326                 # that are later expanded to html- so expand them now and
4327                 # remove the tags
4328                 $alt = $this->mStripState->unstripBoth( $alt );
4329                 $alt = Sanitizer::stripAllTags( $alt );
4330
4331                 # Linker does the rest
4332                 $sk =& $this->mOptions->getSkin();
4333                 return $sk->makeImageLinkObj( $nt, $caption, $alt, $align, $width, $height, $framed, $thumb, $manual_thumb, $page );
4334         }
4335
4336         /**
4337          * Set a flag in the output object indicating that the content is dynamic and
4338          * shouldn't be cached.
4339          */
4340         function disableCache() {
4341                 wfDebug( "Parser output marked as uncacheable.\n" );
4342                 $this->mOutput->mCacheTime = -1;
4343         }
4344
4345         /**#@+
4346          * Callback from the Sanitizer for expanding items found in HTML attribute
4347          * values, so they can be safely tested and escaped.
4348          * @param string $text
4349          * @param array $args
4350          * @return string
4351          * @private
4352          */
4353         function attributeStripCallback( &$text, $args ) {
4354                 $text = $this->replaceVariables( $text, $args );
4355                 $text = $this->mStripState->unstripBoth( $text );
4356                 return $text;
4357         }
4358
4359         /**#@-*/
4360
4361         /**#@+
4362          * Accessor/mutator
4363          */
4364         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4365         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4366         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4367         /**#@-*/
4368
4369         /**#@+
4370          * Accessor
4371          */
4372         function getTags() { return array_keys( $this->mTagHooks ); }
4373         /**#@-*/
4374
4375
4376         /**
4377          * Break wikitext input into sections, and either pull or replace
4378          * some particular section's text.
4379          *
4380          * External callers should use the getSection and replaceSection methods.
4381          *
4382          * @param $text Page wikitext
4383          * @param $section Numbered section. 0 pulls the text before the first
4384          *                 heading; other numbers will pull the given section
4385          *                 along with its lower-level subsections.
4386          * @param $mode One of "get" or "replace"
4387          * @param $newtext Replacement text for section data.
4388          * @return string for "get", the extracted section text.
4389          *                for "replace", the whole page with the section replaced.
4390          */
4391         private function extractSections( $text, $section, $mode, $newtext='' ) {
4392                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
4393                 # comments to be stripped as well)
4394                 $stripState = new StripState;
4395
4396                 $oldOutputType = $this->mOutputType;
4397                 $oldOptions = $this->mOptions;
4398                 $this->mOptions = new ParserOptions();
4399                 $this->setOutputType( OT_WIKI );
4400
4401                 $striptext = $this->strip( $text, $stripState, true );
4402
4403                 $this->setOutputType( $oldOutputType );
4404                 $this->mOptions = $oldOptions;
4405
4406                 # now that we can be sure that no pseudo-sections are in the source,
4407                 # split it up by section
4408                 $uniq = preg_quote( $this->uniqPrefix(), '/' );
4409                 $comment = "(?:$uniq-!--.*?QINU)";
4410                 $secs = preg_split(
4411                 /*
4412                         "/
4413                         ^(
4414                         (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4415                         (?:
4416                                 (=+) # Should this be limited to 6?
4417                                 .+?  # Section title...
4418                                 \\2  # Ending = count must match start
4419                         |
4420                                 ^
4421                                 <h([1-6])\b.*?>
4422                                 .*?
4423                                 <\/h\\3\s*>
4424                         )
4425                         (?:$comment|<\/?noinclude>|\s+)* # Trailing whitespace ok
4426                         )$
4427                         /mix",
4428                 */
4429                         "/
4430                         (
4431                                 ^
4432                                 (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4433                                 (=+) # Should this be limited to 6?
4434                                 .+?  # Section title...
4435                                 \\2  # Ending = count must match start
4436                                 (?:$comment|<\/?noinclude>|[ \\t]+)* # Trailing whitespace ok
4437                                 $
4438                         |
4439                                 <h([1-6])\b.*?>
4440                                 .*?
4441                                 <\/h\\3\s*>
4442                         )
4443                         /mix",
4444                         $striptext, -1,
4445                         PREG_SPLIT_DELIM_CAPTURE);
4446
4447                 if( $mode == "get" ) {
4448                         if( $section == 0 ) {
4449                                 // "Section 0" returns the content before any other section.
4450                                 $rv = $secs[0];
4451                         } else {
4452                                 $rv = "";
4453                         }
4454                 } elseif( $mode == "replace" ) {
4455                         if( $section == 0 ) {
4456                                 $rv = $newtext . "\n\n";
4457                                 $remainder = true;
4458                         } else {
4459                                 $rv = $secs[0];
4460                                 $remainder = false;
4461                         }
4462                 }
4463                 $count = 0;
4464                 $sectionLevel = 0;
4465                 for( $index = 1; $index < count( $secs ); ) {
4466                         $headerLine = $secs[$index++];
4467                         if( $secs[$index] ) {
4468                                 // A wiki header
4469                                 $headerLevel = strlen( $secs[$index++] );
4470                         } else {
4471                                 // An HTML header
4472                                 $index++;
4473                                 $headerLevel = intval( $secs[$index++] );
4474                         }
4475                         $content = $secs[$index++];
4476
4477                         $count++;
4478                         if( $mode == "get" ) {
4479                                 if( $count == $section ) {
4480                                         $rv = $headerLine . $content;
4481                                         $sectionLevel = $headerLevel;
4482                                 } elseif( $count > $section ) {
4483                                         if( $sectionLevel && $headerLevel > $sectionLevel ) {
4484                                                 $rv .= $headerLine . $content;
4485                                         } else {
4486                                                 // Broke out to a higher-level section
4487                                                 break;
4488                                         }
4489                                 }
4490                         } elseif( $mode == "replace" ) {
4491                                 if( $count < $section ) {
4492                                         $rv .= $headerLine . $content;
4493                                 } elseif( $count == $section ) {
4494                                         $rv .= $newtext . "\n\n";
4495                                         $sectionLevel = $headerLevel;
4496                                 } elseif( $count > $section ) {
4497                                         if( $headerLevel <= $sectionLevel ) {
4498                                                 // Passed the section's sub-parts.
4499                                                 $remainder = true;
4500                                         }
4501                                         if( $remainder ) {
4502                                                 $rv .= $headerLine . $content;
4503                                         }
4504                                 }
4505                         }
4506                 }
4507                 # reinsert stripped tags
4508                 $rv = trim( $stripState->unstripBoth( $rv ) );
4509                 return $rv;
4510         }
4511
4512         /**
4513          * This function returns the text of a section, specified by a number ($section).
4514          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
4515          * the first section before any such heading (section 0).
4516          *
4517          * If a section contains subsections, these are also returned.
4518          *
4519          * @param $text String: text to look in
4520          * @param $section Integer: section number
4521          * @return string text of the requested section
4522          */
4523         function getSection( $text, $section ) {
4524                 return $this->extractSections( $text, $section, "get" );
4525         }
4526
4527         function replaceSection( $oldtext, $section, $text ) {
4528                 return $this->extractSections( $oldtext, $section, "replace", $text );
4529         }
4530
4531         /**
4532          * Get the timestamp associated with the current revision, adjusted for
4533          * the user's current timestamp
4534          */
4535         function getRevisionTimestamp() {
4536                 if ( is_null( $this->mRevisionTimestamp ) ) {
4537                         wfProfileIn( __METHOD__ );
4538                         global $wgContLang;
4539                         $dbr =& wfGetDB( DB_SLAVE );
4540                         $timestamp = $dbr->selectField( 'revision', 'rev_timestamp',
4541                                         array( 'rev_id' => $id ), __METHOD__ );
4542                         $this->mRevisionTimestamp = $wgContLang->userAdjust( $timestamp );
4543
4544                         wfProfileOut( __METHOD__ );
4545                 }
4546                 return $this->mRevisionTimestamp;
4547         }
4548 }
4549
4550 /**
4551  * @todo document
4552  * @package MediaWiki
4553  */
4554 class ParserOutput
4555 {
4556         var $mText,             # The output text
4557                 $mLanguageLinks,    # List of the full text of language links, in the order they appear
4558                 $mCategories,       # Map of category names to sort keys
4559                 $mContainsOldMagic, # Boolean variable indicating if the input contained variables like {{CURRENTDAY}}
4560                 $mCacheTime,        # Time when this object was generated, or -1 for uncacheable. Used in ParserCache.
4561                 $mVersion,          # Compatibility check
4562                 $mTitleText,        # title text of the chosen language variant
4563                 $mLinks,            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
4564                 $mTemplates,        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
4565                 $mImages,           # DB keys of the images used, in the array key only
4566                 $mExternalLinks,    # External link URLs, in the key only
4567                 $mHTMLtitle,            # Display HTML title
4568                 $mSubtitle,                     # Additional subtitle
4569                 $mNewSection,           # Show a new section link?
4570                 $mNoGallery;            # No gallery on category page? (__NOGALLERY__)
4571
4572         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
4573                 $containsOldMagic = false, $titletext = '' )
4574         {
4575                 $this->mText = $text;
4576                 $this->mLanguageLinks = $languageLinks;
4577                 $this->mCategories = $categoryLinks;
4578                 $this->mContainsOldMagic = $containsOldMagic;
4579                 $this->mCacheTime = '';
4580                 $this->mVersion = MW_PARSER_VERSION;
4581                 $this->mTitleText = $titletext;
4582                 $this->mLinks = array();
4583                 $this->mTemplates = array();
4584                 $this->mImages = array();
4585                 $this->mExternalLinks = array();
4586                 $this->mHTMLtitle = "" ;
4587                 $this->mSubtitle = "" ;
4588                 $this->mNewSection = false;
4589                 $this->mNoGallery = false;
4590         }
4591
4592         function getText()                   { return $this->mText; }
4593         function &getLanguageLinks()          { return $this->mLanguageLinks; }
4594         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
4595         function &getCategories()            { return $this->mCategories; }
4596         function getCacheTime()              { return $this->mCacheTime; }
4597         function getTitleText()              { return $this->mTitleText; }
4598         function &getLinks()                 { return $this->mLinks; }
4599         function &getTemplates()             { return $this->mTemplates; }
4600         function &getImages()                { return $this->mImages; }
4601         function &getExternalLinks()         { return $this->mExternalLinks; }
4602         function getNoGallery()              { return $this->mNoGallery; }
4603         function getSubtitle()               { return $this->mSubtitle; }
4604
4605         function containsOldMagic()          { return $this->mContainsOldMagic; }
4606         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
4607         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
4608         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
4609         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
4610         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
4611         function setTitleText( $t )          { return wfSetVar($this->mTitleText, $t); }
4612         function setSubtitle( $st )          { return wfSetVar( $this->mSubtitle, $st ); }
4613
4614         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
4615         function addImage( $name )           { $this->mImages[$name] = 1; }
4616         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
4617         function addExternalLink( $url )     { $this->mExternalLinks[$url] = 1; }
4618
4619         function setNewSection( $value ) {
4620                 $this->mNewSection = (bool)$value;
4621         }
4622         function getNewSection() {
4623                 return (bool)$this->mNewSection;
4624         }
4625
4626         function addLink( $title, $id = null ) {
4627                 $ns = $title->getNamespace();
4628                 $dbk = $title->getDBkey();
4629                 if ( !isset( $this->mLinks[$ns] ) ) {
4630                         $this->mLinks[$ns] = array();
4631                 }
4632                 if ( is_null( $id ) ) {
4633                         $id = $title->getArticleID();
4634                 }
4635                 $this->mLinks[$ns][$dbk] = $id;
4636         }
4637
4638         function addTemplate( $title, $id ) {
4639                 $ns = $title->getNamespace();
4640                 $dbk = $title->getDBkey();
4641                 if ( !isset( $this->mTemplates[$ns] ) ) {
4642                         $this->mTemplates[$ns] = array();
4643                 }
4644                 $this->mTemplates[$ns][$dbk] = $id;
4645         }
4646
4647         /**
4648          * Return true if this cached output object predates the global or
4649          * per-article cache invalidation timestamps, or if it comes from
4650          * an incompatible older version.
4651          *
4652          * @param string $touched the affected article's last touched timestamp
4653          * @return bool
4654          * @public
4655          */
4656         function expired( $touched ) {
4657                 global $wgCacheEpoch;
4658                 return $this->getCacheTime() == -1 || // parser says it's uncacheable
4659                        $this->getCacheTime() < $touched ||
4660                        $this->getCacheTime() <= $wgCacheEpoch ||
4661                        !isset( $this->mVersion ) ||
4662                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
4663         }
4664 }
4665
4666 /**
4667  * Set options of the Parser
4668  * @todo document
4669  * @package MediaWiki
4670  */
4671 class ParserOptions
4672 {
4673         # All variables are supposed to be private in theory, although in practise this is not the case.
4674         var $mUseTeX;                    # Use texvc to expand <math> tags
4675         var $mUseDynamicDates;           # Use DateFormatter to format dates
4676         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
4677         var $mAllowExternalImages;       # Allow external images inline
4678         var $mAllowExternalImagesFrom;   # If not, any exception?
4679         var $mSkin;                      # Reference to the preferred skin
4680         var $mDateFormat;                # Date format index
4681         var $mEditSection;               # Create "edit section" links
4682         var $mNumberHeadings;            # Automatically number headings
4683         var $mAllowSpecialInclusion;     # Allow inclusion of special pages
4684         var $mTidy;                      # Ask for tidy cleanup
4685         var $mInterfaceMessage;          # Which lang to call for PLURAL and GRAMMAR
4686         var $mMaxIncludeSize;            # Maximum size of template expansions, in bytes
4687         var $mRemoveComments;            # Remove HTML comments. ONLY APPLIES TO PREPROCESS OPERATIONS
4688
4689         var $mUser;                      # Stored user object, just used to initialise the skin
4690
4691         function getUseTeX()                        { return $this->mUseTeX; }
4692         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
4693         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
4694         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
4695         function getAllowExternalImagesFrom()       { return $this->mAllowExternalImagesFrom; }
4696         function getEditSection()                   { return $this->mEditSection; }
4697         function getNumberHeadings()                { return $this->mNumberHeadings; }
4698         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
4699         function getTidy()                          { return $this->mTidy; }
4700         function getInterfaceMessage()              { return $this->mInterfaceMessage; }
4701         function getMaxIncludeSize()                { return $this->mMaxIncludeSize; }
4702         function getRemoveComments()                { return $this->mRemoveComments; }
4703
4704         function &getSkin() {
4705                 if ( !isset( $this->mSkin ) ) {
4706                         $this->mSkin = $this->mUser->getSkin();
4707                 }
4708                 return $this->mSkin;
4709         }
4710
4711         function getDateFormat() {
4712                 if ( !isset( $this->mDateFormat ) ) {
4713                         $this->mDateFormat = $this->mUser->getDatePreference();
4714                 }
4715                 return $this->mDateFormat;
4716         }
4717
4718         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
4719         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
4720         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
4721         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
4722         function setAllowExternalImagesFrom( $x )   { return wfSetVar( $this->mAllowExternalImagesFrom, $x ); }
4723         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
4724         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
4725         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
4726         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
4727         function setTidy( $x )                      { return wfSetVar( $this->mTidy, $x); }
4728         function setSkin( $x )                      { $this->mSkin = $x; }
4729         function setInterfaceMessage( $x )          { return wfSetVar( $this->mInterfaceMessage, $x); }
4730         function setMaxIncludeSize( $x )            { return wfSetVar( $this->mMaxIncludeSize, $x ); }
4731         function setRemoveComments( $x )            { return wfSetVar( $this->mRemoveComments, $x ); }
4732
4733         function ParserOptions( $user = null ) {
4734                 $this->initialiseFromUser( $user );
4735         }
4736
4737         /**
4738          * Get parser options
4739          * @static
4740          */
4741         static function newFromUser( $user ) {
4742                 return new ParserOptions( $user );
4743         }
4744
4745         /** Get user options */
4746         function initialiseFromUser( $userInput ) {
4747                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
4748                 global $wgAllowExternalImagesFrom, $wgAllowSpecialInclusion, $wgMaxArticleSize;
4749                 $fname = 'ParserOptions::initialiseFromUser';
4750                 wfProfileIn( $fname );
4751                 if ( !$userInput ) {
4752                         global $wgUser;
4753                         if ( isset( $wgUser ) ) {
4754                                 $user = $wgUser;
4755                         } else {
4756                                 $user = new User;
4757                         }
4758                 } else {
4759                         $user =& $userInput;
4760                 }
4761
4762                 $this->mUser = $user;
4763
4764                 $this->mUseTeX = $wgUseTeX;
4765                 $this->mUseDynamicDates = $wgUseDynamicDates;
4766                 $this->mInterwikiMagic = $wgInterwikiMagic;
4767                 $this->mAllowExternalImages = $wgAllowExternalImages;
4768                 $this->mAllowExternalImagesFrom = $wgAllowExternalImagesFrom;
4769                 $this->mSkin = null; # Deferred
4770                 $this->mDateFormat = null; # Deferred
4771                 $this->mEditSection = true;
4772                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
4773                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
4774                 $this->mTidy = false;
4775                 $this->mInterfaceMessage = false;
4776                 $this->mMaxIncludeSize = $wgMaxArticleSize * 1024;
4777                 $this->mRemoveComments = true;
4778                 wfProfileOut( $fname );
4779         }
4780 }
4781
4782 class OnlyIncludeReplacer {
4783         var $output = '';
4784
4785         function replace( $matches ) {
4786                 if ( substr( $matches[1], -1 ) == "\n" ) {
4787                         $this->output .= substr( $matches[1], 0, -1 );
4788                 } else {
4789                         $this->output .= $matches[1];
4790                 }
4791         }
4792 }
4793
4794 class StripState {
4795         var $general, $nowiki;
4796
4797         function __construct() {
4798                 $this->general = new ReplacementArray;
4799                 $this->nowiki = new ReplacementArray;
4800         }
4801
4802         function unstripGeneral( $text ) {
4803                 wfProfileIn( __METHOD__ );
4804                 $text = $this->general->replace( $text );
4805                 wfProfileOut( __METHOD__ );
4806                 return $text;
4807         }
4808
4809         function unstripNoWiki( $text ) {
4810                 wfProfileIn( __METHOD__ );
4811                 $text = $this->nowiki->replace( $text );
4812                 wfProfileOut( __METHOD__ );
4813                 return $text;
4814         }
4815
4816         function unstripBoth( $text ) {
4817                 wfProfileIn( __METHOD__ );
4818                 $text = $this->general->replace( $text );
4819                 $text = $this->nowiki->replace( $text );
4820                 wfProfileOut( __METHOD__ );
4821                 return $text;
4822         }
4823 }
4824
4825 ?>