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 = array();
 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
 117         /**#@-*/
 118
 119         /**
 120          * Constructor
 121          *
 122          * @public
 123          */
 124         function Parser() {
 125                 $this->mTagHooks = array();
 126                 $this->mFunctionHooks = array();
 127                 $this->mFunctionSynonyms = array( 0 => array(), 1 => array() );
 128                 $this->mFirstCall = true;
 129         }
 130
 131         /**
 132          * Do various kinds of initialisation on the first call of the parser
 133          */
 134         function firstCallInit() {
 135                 if ( !$this->mFirstCall ) {
 136                         return;
 137                 }
 138
 139                 wfProfileIn( __METHOD__ );
 140                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
 141
 142                 $this->setHook( 'pre', array( $this, 'renderPreTag' ) );
 143
 144                 $this->setFunctionHook( 'int', array( 'CoreParserFunctions', 'intFunction' ), SFH_NO_HASH );
 145                 $this->setFunctionHook( 'ns', array( 'CoreParserFunctions', 'ns' ), SFH_NO_HASH );
 146                 $this->setFunctionHook( 'urlencode', array( 'CoreParserFunctions', 'urlencode' ), SFH_NO_HASH );
 147                 $this->setFunctionHook( 'lcfirst', array( 'CoreParserFunctions', 'lcfirst' ), SFH_NO_HASH );
 148                 $this->setFunctionHook( 'ucfirst', array( 'CoreParserFunctions', 'ucfirst' ), SFH_NO_HASH );
 149                 $this->setFunctionHook( 'lc', array( 'CoreParserFunctions', 'lc' ), SFH_NO_HASH );
 150                 $this->setFunctionHook( 'uc', array( 'CoreParserFunctions', 'uc' ), SFH_NO_HASH );
 151                 $this->setFunctionHook( 'localurl', array( 'CoreParserFunctions', 'localurl' ), SFH_NO_HASH );
 152                 $this->setFunctionHook( 'localurle', array( 'CoreParserFunctions', 'localurle' ), SFH_NO_HASH );
 153                 $this->setFunctionHook( 'fullurl', array( 'CoreParserFunctions', 'fullurl' ), SFH_NO_HASH );
 154                 $this->setFunctionHook( 'fullurle', array( 'CoreParserFunctions', 'fullurle' ), SFH_NO_HASH );
 155                 $this->setFunctionHook( 'formatnum', array( 'CoreParserFunctions', 'formatnum' ), SFH_NO_HASH );
 156                 $this->setFunctionHook( 'grammar', array( 'CoreParserFunctions', 'grammar' ), SFH_NO_HASH );
 157                 $this->setFunctionHook( 'plural', array( 'CoreParserFunctions', 'plural' ), SFH_NO_HASH );
 158                 $this->setFunctionHook( 'numberofpages', array( 'CoreParserFunctions', 'numberofpages' ), SFH_NO_HASH );
 159                 $this->setFunctionHook( 'numberofusers', array( 'CoreParserFunctions', 'numberofusers' ), SFH_NO_HASH );
 160                 $this->setFunctionHook( 'numberofarticles', array( 'CoreParserFunctions', 'numberofarticles' ), SFH_NO_HASH );
 161                 $this->setFunctionHook( 'numberoffiles', array( 'CoreParserFunctions', 'numberoffiles' ), SFH_NO_HASH );
 162                 $this->setFunctionHook( 'numberofadmins', array( 'CoreParserFunctions', 'numberofadmins' ), SFH_NO_HASH );
 163                 $this->setFunctionHook( 'language', array( 'CoreParserFunctions', 'language' ), SFH_NO_HASH );
 164                 $this->setFunctionHook( 'padleft', array( 'CoreParserFunctions', 'padleft' ), SFH_NO_HASH );
 165                 $this->setFunctionHook( 'padright', array( 'CoreParserFunctions', 'padright' ), SFH_NO_HASH );
 166                 $this->setFunctionHook( 'anchorencode', array( 'CoreParserFunctions', 'anchorencode' ), SFH_NO_HASH );
 167                 $this->setFunctionHook( 'special', array( 'CoreParserFunctions', 'special' ) );
 168
 169                 if ( $wgAllowDisplayTitle ) {
 170                         $this->setFunctionHook( 'displaytitle', array( 'CoreParserFunctions', 'displaytitle' ), SFH_NO_HASH );
 171                 }
 172                 if ( $wgAllowSlowParserFunctions ) {
 173                         $this->setFunctionHook( 'pagesinnamespace', array( 'CoreParserFunctions', 'pagesinnamespace' ), SFH_NO_HASH );
 174                 }
 175
 176                 $this->initialiseVariables();
 177
 178                 $this->mFirstCall = false;
 179                 wfProfileOut( __METHOD__ );
 180         }
 181
 182         /**
 183          * Clear Parser state
 184          *
 185          * @private
 186          */
 187         function clearState() {
 188                 wfProfileIn( __METHOD__ );
 189                 if ( $this->mFirstCall ) {
 190                         $this->firstCallInit();
 191                 }
 192                 $this->mOutput = new ParserOutput;
 193                 $this->mAutonumber = 0;
 194                 $this->mLastSection = '';
 195                 $this->mDTopen = false;
 196                 $this->mIncludeCount = array();
 197                 $this->mStripState = array();
 198                 $this->mArgStack = array();
 199                 $this->mInPre = false;
 200                 $this->mInterwikiLinkHolders = array(
 201                         'texts' => array(),
 202                         'titles' => array()
 203                 );
 204                 $this->mLinkHolders = array(
 205                         'namespaces' => array(),
 206                         'dbkeys' => array(),
 207                         'queries' => array(),
 208                         'texts' => array(),
 209                         'titles' => array()
 210                 );
 211                 $this->mRevisionId = null;
 212
 213                 /**
 214                  * Prefix for temporary replacement strings for the multipass parser.
 215                  * \x07 should never appear in input as it's disallowed in XML.
 216                  * Using it at the front also gives us a little extra robustness
 217                  * since it shouldn't match when butted up against identifier-like
 218                  * string constructs.
 219                  */
 220                 $this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 221
 222                 # Clear these on every parse, bug 4549
 223                 $this->mTemplates = array();
 224                 $this->mTemplatePath = array();
 225
 226                 $this->mShowToc = true;
 227                 $this->mForceTocPosition = false;
 228                 $this->mIncludeSizes = array(
 229                         'pre-expand' => 0,
 230                         'post-expand' => 0,
 231                         'arg' => 0
 232                 );
 233
 234                 wfRunHooks( 'ParserClearState', array( &$this ) );
 235                 wfProfileOut( __METHOD__ );
 236         }
 237
 238         function setOutputType( $ot ) {
 239                 $this->mOutputType = $ot;
 240                 // Shortcut alias
 241                 $this->ot = array(
 242                         'html' => $ot == OT_HTML,
 243                         'wiki' => $ot == OT_WIKI,
 244                         'msg' => $ot == OT_MSG,
 245                         'pre' => $ot == OT_PREPROCESS,
 246                 );
 247         }
 248
 249         /**
 250          * Accessor for mUniqPrefix.
 251          *
 252          * @public
 253          */
 254         function uniqPrefix() {
 255                 return $this->mUniqPrefix;
 256         }
 257
 258         /**
 259          * Convert wikitext to HTML
 260          * Do not call this function recursively.
 261          *
 262          * @private
 263          * @param string $text Text we want to parse
 264          * @param Title &$title A title object
 265          * @param array $options
 266          * @param boolean $linestart
 267          * @param boolean $clearState
 268          * @param int $revid number to pass in {{REVISIONID}}
 269          * @return ParserOutput a ParserOutput
 270          */
 271         function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 272                 /**
 273                  * First pass--just handle <nowiki> sections, pass the rest off
 274                  * to internalParse() which does all the real work.
 275                  */
 276
 277                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 278                 $fname = 'Parser::parse-' . wfGetCaller();
 279                 wfProfileIn( __METHOD__ );
 280                 wfProfileIn( $fname );
 281
 282                 if ( $clearState ) {
 283                         $this->clearState();
 284                 }
 285
 286                 $this->mOptions = $options;
 287                 $this->mTitle =& $title;
 288                 $oldRevisionId = $this->mRevisionId;
 289                 if( $revid !== null ) {
 290                         $this->mRevisionId = $revid;
 291                 }
 292                 $this->setOutputType( OT_HTML );
 293
 294                 //$text = $this->strip( $text, $this->mStripState );
 295                 // VOODOO MAGIC FIX! Sometimes the above segfaults in PHP5.
 296                 $x =& $this->mStripState;
 297
 298                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 299                 $text = $this->strip( $text, $x );
 300                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 301
 302                 $text = $this->internalParse( $text );
 303
 304                 $text = $this->unstrip( $text, $this->mStripState );
 305
 306                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 307                 $fixtags = array(
 308                         # french spaces, last one Guillemet-left
 309                         # only if there is something before the space
 310                         '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 311                         # french spaces, Guillemet-right
 312                         '/(\\302\\253) /' => '\\1&nbsp;',
 313                 );
 314                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 315
 316                 # only once and last
 317                 $text = $this->doBlockLevels( $text, $linestart );
 318
 319                 $this->replaceLinkHolders( $text );
 320
 321                 # the position of the parserConvert() call should not be changed. it
 322                 # assumes that the links are all replaced and the only thing left
 323                 # is the <nowiki> mark.
 324                 # Side-effects: this calls $this->mOutput->setTitleText()
 325                 $text = $wgContLang->parserConvert( $text, $this );
 326
 327                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 328
 329                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 330
 331                 $text = Sanitizer::normalizeCharReferences( $text );
 332
 333                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 334                         $text = Parser::tidy($text);
 335                 } else {
 336                         # attempt to sanitize at least some nesting problems
 337                         # (bug #2702 and quite a few others)
 338                         $tidyregs = array(
 339                                 # ''Something [http://www.cool.com cool''] -->
 340                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 341                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 342                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 343                                 # fix up an anchor inside another anchor, only
 344                                 # at least for a single single nested link (bug 3695)
 345                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 346                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 347                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 348                                 # contains a div, so fix it up here; replace
 349                                 # div with escaped text
 350                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 351                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 352                                 # remove empty italic or bold tag pairs, some
 353                                 # introduced by rules above
 354                                 '/<([bi])><\/\\1>/' => '',
 355                         );
 356
 357                         $text = preg_replace(
 358                                 array_keys( $tidyregs ),
 359                                 array_values( $tidyregs ),
 360                                 $text );
 361                 }
 362
 363                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 364
 365                 # Information on include size limits, for the benefit of users who try to skirt them
 366                 if ( max( $this->mIncludeSizes ) > 1000 ) {
 367                         $max = $this->mOptions->getMaxIncludeSize();
 368                         $text .= "<!-- \n" .
 369                                 "Pre-expand include size: {$this->mIncludeSizes['pre-expand']} bytes\n" .
 370                                 "Post-expand include size: {$this->mIncludeSizes['post-expand']} bytes\n" .
 371                                 "Template argument size: {$this->mIncludeSizes['arg']} bytes\n" .
 372                                 "Maximum: $max bytes\n" .
 373                                 "-->\n";
 374                 }
 375                 $this->mOutput->setText( $text );
 376                 $this->mRevisionId = $oldRevisionId;
 377                 wfProfileOut( $fname );
 378                 wfProfileOut( __METHOD__ );
 379
 380                 return $this->mOutput;
 381         }
 382
 383         /**
 384          * Recursive parser entry point that can be called from an extension tag
 385          * hook.
 386          */
 387         function recursiveTagParse( $text ) {
 388                 wfProfileIn( __METHOD__ );
 389                 $x =& $this->mStripState;
 390                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 391                 $text = $this->strip( $text, $x );
 392                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 393                 $text = $this->internalParse( $text );
 394                 wfProfileOut( __METHOD__ );
 395                 return $text;
 396         }
 397
 398         /**
 399          * Expand templates and variables in the text, producing valid, static wikitext.
 400          * Also removes comments.
 401          */
 402         function preprocess( $text, $title, $options ) {
 403                 wfProfileIn( __METHOD__ );
 404                 $this->clearState();
 405                 $this->setOutputType( OT_PREPROCESS );
 406                 $this->mOptions = $options;
 407                 $this->mTitle = $title;
 408                 $x =& $this->mStripState;
 409                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 410                 $text = $this->strip( $text, $x );
 411                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 412                 if ( $this->mOptions->getRemoveComments() ) {
 413                         $text = Sanitizer::removeHTMLcomments( $text );
 414                 }
 415                 $text = $this->replaceVariables( $text );
 416                 $text = $this->unstrip( $text, $x );
 417                 $text = $this->unstripNowiki( $text, $x );
 418                 wfProfileOut( __METHOD__ );
 419                 return $text;
 420         }
 421
 422         /**
 423          * Get a random string
 424          *
 425          * @private
 426          * @static
 427          */
 428         function getRandomString() {
 429                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 430         }
 431
 432         function &getTitle() { return $this->mTitle; }
 433         function getOptions() { return $this->mOptions; }
 434
 435         function getFunctionLang() {
 436                 global $wgLang, $wgContLang;
 437                 return $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
 438         }
 439
 440         /**
 441          * Replaces all occurrences of HTML-style comments and the given tags
 442          * in the text with a random marker and returns teh next text. The output
 443          * parameter $matches will be an associative array filled with data in
 444          * the form:
 445          *   'UNIQ-xxxxx' => array(
 446          *     'element',
 447          *     'tag content',
 448          *     array( 'param' => 'x' ),
 449          *     '<element param="x">tag content</element>' ) )
 450          *
 451          * @param $elements list of element names. Comments are always extracted.
 452          * @param $text Source text string.
 453          * @param $uniq_prefix
 454          *
 455          * @private
 456          * @static
 457          */
 458         function extractTagsAndParams($elements, $text, &$matches, $uniq_prefix = ''){
 459                 static $n = 1;
 460                 $stripped = '';
 461                 $matches = array();
 462
 463                 $taglist = implode( '|', $elements );
 464                 $start = "/<($taglist)(\\s+[^>]*?|\\s*?)(\/?>)|<(!--)/i";
 465
 466                 while ( '' != $text ) {
 467                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 468                         $stripped .= $p[0];
 469                         if( count( $p ) < 5 ) {
 470                                 break;
 471                         }
 472                         if( count( $p ) > 5 ) {
 473                                 // comment
 474                                 $element    = $p[4];
 475                                 $attributes = '';
 476                                 $close      = '';
 477                                 $inside     = $p[5];
 478                         } else {
 479                                 // tag
 480                                 $element    = $p[1];
 481                                 $attributes = $p[2];
 482                                 $close      = $p[3];
 483                                 $inside     = $p[4];
 484                         }
 485
 486                         $marker = "$uniq_prefix-$element-" . sprintf('%08X', $n++) . '-QINU';
 487                         $stripped .= $marker;
 488
 489                         if ( $close === '/>' ) {
 490                                 // Empty element tag, <tag />
 491                                 $content = null;
 492                                 $text = $inside;
 493                                 $tail = null;
 494                         } else {
 495                                 if( $element == '!--' ) {
 496                                         $end = '/(-->)/';
 497                                 } else {
 498                                         $end = "/(<\\/$element\\s*>)/i";
 499                                 }
 500                                 $q = preg_split( $end, $inside, 2, PREG_SPLIT_DELIM_CAPTURE );
 501                                 $content = $q[0];
 502                                 if( count( $q ) < 3 ) {
 503                                         # No end tag -- let it run out to the end of the text.
 504                                         $tail = '';
 505                                         $text = '';
 506                                 } else {
 507                                         $tail = $q[1];
 508                                         $text = $q[2];
 509                                 }
 510                         }
 511
 512                         $matches[$marker] = array( $element,
 513                                 $content,
 514                                 Sanitizer::decodeTagAttributes( $attributes ),
 515                                 "<$element$attributes$close$content$tail" );
 516                 }
 517                 return $stripped;
 518         }
 519
 520         /**
 521          * Strips and renders nowiki, pre, math, hiero
 522          * If $render is set, performs necessary rendering operations on plugins
 523          * Returns the text, and fills an array with data needed in unstrip()
 524          * If the $state is already a valid strip state, it adds to the state
 525          *
 526          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 527          *  will be stripped in addition to other tags. This is important
 528          *  for section editing, where these comments cause confusion when
 529          *  counting the sections in the wikisource
 530          *
 531          * @param array dontstrip contains tags which should not be stripped;
 532          *  used to prevent stipping of <gallery> when saving (fixes bug 2700)
 533          *
 534          * @private
 535          */
 536         function strip( $text, &$state, $stripcomments = false , $dontstrip = array () ) {
 537                 wfProfileIn( __METHOD__ );
 538                 $render = ($this->mOutputType == OT_HTML);
 539
 540                 $uniq_prefix = $this->mUniqPrefix;
 541                 $commentState = array();
 542
 543                 $elements = array_merge(
 544                         array( 'nowiki', 'gallery' ),
 545                         array_keys( $this->mTagHooks ) );
 546                 global $wgRawHtml;
 547                 if( $wgRawHtml ) {
 548                         $elements[] = 'html';
 549                 }
 550                 if( $this->mOptions->getUseTeX() ) {
 551                         $elements[] = 'math';
 552                 }
 553
 554                 # Removing $dontstrip tags from $elements list (currently only 'gallery', fixing bug 2700)
 555                 foreach ( $elements AS $k => $v ) {
 556                         if ( !in_array ( $v , $dontstrip ) ) continue;
 557                         unset ( $elements[$k] );
 558                 }
 559
 560                 $matches = array();
 561                 $text = Parser::extractTagsAndParams( $elements, $text, $matches, $uniq_prefix );
 562
 563                 foreach( $matches as $marker => $data ) {
 564                         list( $element, $content, $params, $tag ) = $data;
 565                         if( $render ) {
 566                                 $tagName = strtolower( $element );
 567                                 wfProfileIn( __METHOD__."-render-$tagName" );
 568                                 switch( $tagName ) {
 569                                 case '!--':
 570                                         // Comment
 571                                         if( substr( $tag, -3 ) == '-->' ) {
 572                                                 $output = $tag;
 573                                         } else {
 574                                                 // Unclosed comment in input.
 575                                                 // Close it so later stripping can remove it
 576                                                 $output = "$tag-->";
 577                                         }
 578                                         break;
 579                                 case 'html':
 580                                         if( $wgRawHtml ) {
 581                                                 $output = $content;
 582                                                 break;
 583                                         }
 584                                         // Shouldn't happen otherwise. :)
 585                                 case 'nowiki':
 586                                         $output = wfEscapeHTMLTagsOnly( $content );
 587                                         break;
 588                                 case 'math':
 589                                         $output = MathRenderer::renderMath( $content );
 590                                         break;
 591                                 case 'gallery':
 592                                         $output = $this->renderImageGallery( $content, $params );
 593                                         break;
 594                                 default:
 595                                         if( isset( $this->mTagHooks[$tagName] ) ) {
 596                                                 $output = call_user_func_array( $this->mTagHooks[$tagName],
 597                                                         array( $content, $params, $this ) );
 598                                         } else {
 599                                                 throw new MWException( "Invalid call hook $element" );
 600                                         }
 601                                 }
 602                                 wfProfileOut( __METHOD__."-render-$tagName" );
 603                         } else {
 604                                 // Just stripping tags; keep the source
 605                                 $output = $tag;
 606                         }
 607
 608                         // Unstrip the output, because unstrip() is no longer recursive so
 609                         // it won't do it itself
 610                         $output = $this->unstrip( $output, $state );
 611
 612                         if( !$stripcomments && $element == '!--' ) {
 613                                 $commentState[$marker] = $output;
 614                         } elseif ( $element == 'html' || $element == 'nowiki' ) {
 615                                 $state['nowiki'][$marker] = $output;
 616                         } else {
 617                                 $state['general'][$marker] = $output;
 618                         }
 619                 }
 620
 621                 # Unstrip comments unless explicitly told otherwise.
 622                 # (The comments are always stripped prior to this point, so as to
 623                 # not invoke any extension tags / parser hooks contained within
 624                 # a comment.)
 625                 if ( !$stripcomments ) {
 626                         // Put them all back and forget them
 627                         $text = strtr( $text, $commentState );
 628                 }
 629
 630                 wfProfileOut( __METHOD__ );
 631                 return $text;
 632         }
 633
 634         /**
 635          * Restores pre, math, and other extensions removed by strip()
 636          *
 637          * always call unstripNoWiki() after this one
 638          * @private
 639          */
 640         function unstrip( $text, $state ) {
 641                 if ( !isset( $state['general'] ) ) {
 642                         return $text;
 643                 }
 644
 645                 wfProfileIn( __METHOD__ );
 646                 # TODO: good candidate for FSS
 647                 $text = strtr( $text, $state['general'] );
 648                 wfProfileOut( __METHOD__ );
 649                 return $text;
 650         }
 651
 652         /**
 653          * Always call this after unstrip() to preserve the order
 654          *
 655          * @private
 656          */
 657         function unstripNoWiki( $text, $state ) {
 658                 if ( !isset( $state['nowiki'] ) ) {
 659                         return $text;
 660                 }
 661
 662                 wfProfileIn( __METHOD__ );
 663                 # TODO: good candidate for FSS
 664                 $text = strtr( $text, $state['nowiki'] );
 665                 wfProfileOut( __METHOD__ );
 666
 667                 return $text;
 668         }
 669
 670         /**
 671          * Add an item to the strip state
 672          * Returns the unique tag which must be inserted into the stripped text
 673          * The tag will be replaced with the original text in unstrip()
 674          *
 675          * @private
 676          */
 677         function insertStripItem( $text, &$state ) {
 678                 $rnd = $this->mUniqPrefix . '-item' . Parser::getRandomString();
 679                 if ( !$state ) {
 680                         $state = array();
 681                 }
 682                 $state['general'][$rnd] = $text;
 683                 return $rnd;
 684         }
 685
 686         /**
 687          * Interface with html tidy, used if $wgUseTidy = true.
 688          * If tidy isn't able to correct the markup, the original will be
 689          * returned in all its glory with a warning comment appended.
 690          *
 691          * Either the external tidy program or the in-process tidy extension
 692          * will be used depending on availability. Override the default
 693          * $wgTidyInternal setting to disable the internal if it's not working.
 694          *
 695          * @param string $text Hideous HTML input
 696          * @return string Corrected HTML output
 697          * @public
 698          * @static
 699          */
 700         function tidy( $text ) {
 701                 global $wgTidyInternal;
 702                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 703 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 704 '<head><title>test</title></head><body>'.$text.'</body></html>';
 705                 if( $wgTidyInternal ) {
 706                         $correctedtext = Parser::internalTidy( $wrappedtext );
 707                 } else {
 708                         $correctedtext = Parser::externalTidy( $wrappedtext );
 709                 }
 710                 if( is_null( $correctedtext ) ) {
 711                         wfDebug( "Tidy error detected!\n" );
 712                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 713                 }
 714                 return $correctedtext;
 715         }
 716
 717         /**
 718          * Spawn an external HTML tidy process and get corrected markup back from it.
 719          *
 720          * @private
 721          * @static
 722          */
 723         function externalTidy( $text ) {
 724                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 725                 $fname = 'Parser::externalTidy';
 726                 wfProfileIn( $fname );
 727
 728                 $cleansource = '';
 729                 $opts = ' -utf8';
 730
 731                 $descriptorspec = array(
 732                         0 => array('pipe', 'r'),
 733                         1 => array('pipe', 'w'),
 734                         2 => array('file', '/dev/null', 'a')
 735                 );
 736                 $pipes = array();
 737                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 738                 if (is_resource($process)) {
 739                         // Theoretically, this style of communication could cause a deadlock
 740                         // here. If the stdout buffer fills up, then writes to stdin could
 741                         // block. This doesn't appear to happen with tidy, because tidy only
 742                         // writes to stdout after it's finished reading from stdin. Search
 743                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 744                         fwrite($pipes[0], $text);
 745                         fclose($pipes[0]);
 746                         while (!feof($pipes[1])) {
 747                                 $cleansource .= fgets($pipes[1], 1024);
 748                         }
 749                         fclose($pipes[1]);
 750                         proc_close($process);
 751                 }
 752
 753                 wfProfileOut( $fname );
 754
 755                 if( $cleansource == '' && $text != '') {
 756                         // Some kind of error happened, so we couldn't get the corrected text.
 757                         // Just give up; we'll use the source text and append a warning.
 758                         return null;
 759                 } else {
 760                         return $cleansource;
 761                 }
 762         }
 763
 764         /**
 765          * Use the HTML tidy PECL extension to use the tidy library in-process,
 766          * saving the overhead of spawning a new process. Currently written to
 767          * the PHP 4.3.x version of the extension, may not work on PHP 5.
 768          *
 769          * 'pear install tidy' should be able to compile the extension module.
 770          *
 771          * @private
 772          * @static
 773          */
 774         function internalTidy( $text ) {
 775                 global $wgTidyConf;
 776                 $fname = 'Parser::internalTidy';
 777                 wfProfileIn( $fname );
 778
 779                 tidy_load_config( $wgTidyConf );
 780                 tidy_set_encoding( 'utf8' );
 781                 tidy_parse_string( $text );
 782                 tidy_clean_repair();
 783                 if( tidy_get_status() == 2 ) {
 784                         // 2 is magic number for fatal error
 785                         // http://www.php.net/manual/en/function.tidy-get-status.php
 786                         $cleansource = null;
 787                 } else {
 788                         $cleansource = tidy_get_output();
 789                 }
 790                 wfProfileOut( $fname );
 791                 return $cleansource;
 792         }
 793
 794         /**
 795          * parse the wiki syntax used to render tables
 796          *
 797          * @private
 798          */
 799         function doTableStuff ( $t ) {
 800                 $fname = 'Parser::doTableStuff';
 801                 wfProfileIn( $fname );
 802
 803                 $t = explode ( "\n" , $t ) ;
 804                 $td = array () ; # Is currently a td tag open?
 805                 $ltd = array () ; # Was it TD or TH?
 806                 $tr = array () ; # Is currently a tr tag open?
 807                 $ltr = array () ; # tr attributes
 808                 $has_opened_tr = array(); # Did this table open a <tr> element?
 809                 $indent_level = 0; # indent level of the table
 810                 foreach ( $t AS $k => $x )
 811                 {
 812                         $x = trim ( $x ) ;
 813                         $fc = substr ( $x , 0 , 1 ) ;
 814                         $matches = array();
 815                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 816                                 $indent_level = strlen( $matches[1] );
 817
 818                                 $attributes = $this->unstripForHTML( $matches[2] );
 819
 820                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 821                                         '<table' . Sanitizer::fixTagAttributes ( $attributes, 'table' ) . '>' ;
 822                                 array_push ( $td , false ) ;
 823                                 array_push ( $ltd , '' ) ;
 824                                 array_push ( $tr , false ) ;
 825                                 array_push ( $ltr , '' ) ;
 826                                 array_push ( $has_opened_tr, false );
 827                         }
 828                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 829                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 830                                 $z = "</table>" . substr ( $x , 2);
 831                                 $l = array_pop ( $ltd ) ;
 832                                 if ( !array_pop ( $has_opened_tr ) ) $z = "<tr><td></td></tr>" . $z ;
 833                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 834                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 835                                 array_pop ( $ltr ) ;
 836                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 837                         }
 838                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 839                                 $x = substr ( $x , 1 ) ;
 840                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 841                                 $z = '' ;
 842                                 $l = array_pop ( $ltd ) ;
 843                                 array_pop ( $has_opened_tr );
 844                                 array_push ( $has_opened_tr , true ) ;
 845                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 846                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 847                                 array_pop ( $ltr ) ;
 848                                 $t[$k] = $z ;
 849                                 array_push ( $tr , false ) ;
 850                                 array_push ( $td , false ) ;
 851                                 array_push ( $ltd , '' ) ;
 852                                 $attributes = $this->unstripForHTML( $x );
 853                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $attributes, 'tr' ) ) ;
 854                         }
 855                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 856                                 # $x is a table row
 857                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 858                                         $fc = '+' ;
 859                                         $x = substr ( $x , 1 ) ;
 860                                 }
 861                                 $after = substr ( $x , 1 ) ;
 862                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 863
 864                                 // Split up multiple cells on the same line.
 865                                 // FIXME: This can result in improper nesting of tags processed
 866                                 // by earlier parser steps, but should avoid splitting up eg
 867                                 // attribute values containing literal "||".
 868                                 $after = wfExplodeMarkup( '||', $after );
 869
 870                                 $t[$k] = '' ;
 871
 872                                 # Loop through each table cell
 873                                 foreach ( $after AS $theline )
 874                                 {
 875                                         $z = '' ;
 876                                         if ( $fc != '+' )
 877                                         {
 878                                                 $tra = array_pop ( $ltr ) ;
 879                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 880                                                 array_push ( $tr , true ) ;
 881                                                 array_push ( $ltr , '' ) ;
 882                                                 array_pop ( $has_opened_tr );
 883                                                 array_push ( $has_opened_tr , true ) ;
 884                                         }
 885
 886                                         $l = array_pop ( $ltd ) ;
 887                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 888                                         if ( $fc == '|' ) {
 889                                             $l = 'td' ;
 890                                         } else if ( $fc == '!' ) {
 891                                             $l = 'th' ;
 892                                         } else if ( $fc == '+' ) {
 893                                             $l = 'caption' ;
 894                                         } else {
 895                                             $l = '' ;
 896                                         }
 897                                         array_push ( $ltd , $l ) ;
 898
 899                                         # Cell parameters
 900                                         $y = explode ( '|' , $theline , 2 ) ;
 901                                         # Note that a '|' inside an invalid link should not
 902                                         # be mistaken as delimiting cell parameters
 903                                         if ( strpos( $y[0], '[[' ) !== false ) {
 904                                                 $y = array ($theline);
 905                                         }
 906                                         if ( count ( $y ) == 1 )
 907                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 908                                         else {
 909                                                 $attributes = $this->unstripForHTML( $y[0] );
 910                                                 $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($attributes, $l).">{$y[1]}" ;
 911                                         }
 912                                         $t[$k] .= $y ;
 913                                         array_push ( $td , true ) ;
 914                                 }
 915                         }
 916                 }
 917
 918                 # Closing open td, tr && table
 919                 while ( count ( $td ) > 0 )
 920                 {
 921                         $l = array_pop ( $ltd ) ;
 922                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 923                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 924                         if ( !array_pop ( $has_opened_tr ) ) $t[] = "<tr><td></td></tr>" ;
 925                         $t[] = '</table>' ;
 926                 }
 927
 928                 $t = implode ( "\n" , $t ) ;
 929                 # special case: don't return empty table
 930                 if($t == "<table>\n<tr><td></td></tr>\n</table>")
 931                         $t = '';
 932                 wfProfileOut( $fname );
 933                 return $t ;
 934         }
 935
 936         /**
 937          * Helper function for parse() that transforms wiki markup into
 938          * HTML. Only called for $mOutputType == OT_HTML.
 939          *
 940          * @private
 941          */
 942         function internalParse( $text ) {
 943                 $args = array();
 944                 $isMain = true;
 945                 $fname = 'Parser::internalParse';
 946                 wfProfileIn( $fname );
 947
 948                 # Hook to suspend the parser in this state
 949                 $x =& $this->mStripState; // FIXME: Please check that this initialization is correct.
 950                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$x ) ) ) {
 951                         wfProfileOut( $fname );
 952                         return $text ;
 953                 }
 954
 955                 # Remove <noinclude> tags and <includeonly> sections
 956                 $text = strtr( $text, array( '<onlyinclude>' => '' , '</onlyinclude>' => '' ) );
 957                 $text = strtr( $text, array( '<noinclude>' => '', '</noinclude>' => '') );
 958                 $text = preg_replace( '/<includeonly>.*?<\/includeonly>/s', '', $text );
 959
 960                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ) );
 961
 962                 $text = $this->replaceVariables( $text, $args );
 963
 964                 // Tables need to come after variable replacement for things to work
 965                 // properly; putting them before other transformations should keep
 966                 // exciting things like link expansions from showing up in surprising
 967                 // places.
 968                 $text = $this->doTableStuff( $text );
 969
 970                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 971
 972                 $text = $this->stripToc( $text );
 973                 $this->stripNoGallery( $text );
 974                 $text = $this->doHeadings( $text );
 975                 if($this->mOptions->getUseDynamicDates()) {
 976                         $df =& DateFormatter::getInstance();
 977                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 978                 }
 979                 $text = $this->doAllQuotes( $text );
 980                 $text = $this->replaceInternalLinks( $text );
 981                 $text = $this->replaceExternalLinks( $text );
 982
 983                 # replaceInternalLinks may sometimes leave behind
 984                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 985                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 986
 987                 $text = $this->doMagicLinks( $text );
 988                 $text = $this->formatHeadings( $text, $isMain );
 989
 990                 wfProfileOut( $fname );
 991                 return $text;
 992         }
 993
 994         /**
 995          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 996          * magic external links.
 997          *
 998          * @private
 999          */
1000         function &doMagicLinks( &$text ) {
1001                 wfProfileIn( __METHOD__ );
1002                 $text = preg_replace_callback(
1003                         '!(?:                           # Start cases
1004                             <a.*?</a> |                 # Skip link text
1005                             <.*?> |                     # Skip stuff inside HTML elements
1006                             (?:RFC|PMID)\s+([0-9]+) |   # RFC or PMID, capture number as m[1]
1007                             ISBN\s+([0-9Xx-]+)          # ISBN, capture number as m[2]
1008                         )!x', array( &$this, 'magicLinkCallback' ), $text );
1009                 wfProfileOut( __METHOD__ );
1010                 return $text;
1011         }
1012
1013         function magicLinkCallback( $m ) {
1014                 if ( substr( $m[0], 0, 1 ) == '<' ) {
1015                         # Skip HTML element
1016                         return $m[0];
1017                 } elseif ( substr( $m[0], 0, 4 ) == 'ISBN' ) {
1018                         $isbn = $m[2];
1019                         $num = strtr( $isbn, array(
1020                                 '-' => '',
1021                                 ' ' => '',
1022                                 'x' => 'X',
1023                         ));
1024                         $titleObj = SpecialPage::getTitleFor( 'Booksources' );
1025                         $text = '<a href="' .
1026                                 $titleObj->escapeLocalUrl( "isbn=$num" ) .
1027                                 "\" class=\"internal\">ISBN $isbn</a>";
1028                 } else {
1029                         if ( substr( $m[0], 0, 3 ) == 'RFC' ) {
1030                                 $keyword = 'RFC';
1031                                 $urlmsg = 'rfcurl';
1032                                 $id = $m[1];
1033                         } elseif ( substr( $m[0], 0, 4 ) == 'PMID' ) {
1034                                 $keyword = 'PMID';
1035                                 $urlmsg = 'pubmedurl';
1036                                 $id = $m[1];
1037                         } else {
1038                                 throw new MWException( __METHOD__.': unrecognised match type "' .
1039                                         substr($m[0], 0, 20 ) . '"' );
1040                         }
1041
1042                         $url = wfMsg( $urlmsg, $id);
1043                         $sk =& $this->mOptions->getSkin();
1044                         $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
1045                         $text = "<a href=\"{$url}\"{$la}>{$keyword} {$id}</a>";
1046                 }
1047                 return $text;
1048         }
1049
1050         /**
1051          * Parse headers and return html
1052          *
1053          * @private
1054          */
1055         function doHeadings( $text ) {
1056                 $fname = 'Parser::doHeadings';
1057                 wfProfileIn( $fname );
1058                 for ( $i = 6; $i >= 1; --$i ) {
1059                         $h = str_repeat( '=', $i );
1060                         $text = preg_replace( "/^{$h}(.+){$h}\\s*$/m",
1061                           "<h{$i}>\\1</h{$i}>\\2", $text );
1062                 }
1063                 wfProfileOut( $fname );
1064                 return $text;
1065         }
1066
1067         /**
1068          * Replace single quotes with HTML markup
1069          * @private
1070          * @return string the altered text
1071          */
1072         function doAllQuotes( $text ) {
1073                 $fname = 'Parser::doAllQuotes';
1074                 wfProfileIn( $fname );
1075                 $outtext = '';
1076                 $lines = explode( "\n", $text );
1077                 foreach ( $lines as $line ) {
1078                         $outtext .= $this->doQuotes ( $line ) . "\n";
1079                 }
1080                 $outtext = substr($outtext, 0,-1);
1081                 wfProfileOut( $fname );
1082                 return $outtext;
1083         }
1084
1085         /**
1086          * Helper function for doAllQuotes()
1087          * @private
1088          */
1089         function doQuotes( $text ) {
1090                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1091                 if ( count( $arr ) == 1 )
1092                         return $text;
1093                 else
1094                 {
1095                         # First, do some preliminary work. This may shift some apostrophes from
1096                         # being mark-up to being text. It also counts the number of occurrences
1097                         # of bold and italics mark-ups.
1098                         $i = 0;
1099                         $numbold = 0;
1100                         $numitalics = 0;
1101                         foreach ( $arr as $r )
1102                         {
1103                                 if ( ( $i % 2 ) == 1 )
1104                                 {
1105                                         # If there are ever four apostrophes, assume the first is supposed to
1106                                         # be text, and the remaining three constitute mark-up for bold text.
1107                                         if ( strlen( $arr[$i] ) == 4 )
1108                                         {
1109                                                 $arr[$i-1] .= "'";
1110                                                 $arr[$i] = "'''";
1111                                         }
1112                                         # If there are more than 5 apostrophes in a row, assume they're all
1113                                         # text except for the last 5.
1114                                         else if ( strlen( $arr[$i] ) > 5 )
1115                                         {
1116                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
1117                                                 $arr[$i] = "'''''";
1118                                         }
1119                                         # Count the number of occurrences of bold and italics mark-ups.
1120                                         # We are not counting sequences of five apostrophes.
1121                                         if ( strlen( $arr[$i] ) == 2 )      { $numitalics++;             }
1122                                         else if ( strlen( $arr[$i] ) == 3 ) { $numbold++;                }
1123                                         else if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
1124                                 }
1125                                 $i++;
1126                         }
1127
1128                         # If there is an odd number of both bold and italics, it is likely
1129                         # that one of the bold ones was meant to be an apostrophe followed
1130                         # by italics. Which one we cannot know for certain, but it is more
1131                         # likely to be one that has a single-letter word before it.
1132                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
1133                         {
1134                                 $i = 0;
1135                                 $firstsingleletterword = -1;
1136                                 $firstmultiletterword = -1;
1137                                 $firstspace = -1;
1138                                 foreach ( $arr as $r )
1139                                 {
1140                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1141                                         {
1142                                                 $x1 = substr ($arr[$i-1], -1);
1143                                                 $x2 = substr ($arr[$i-1], -2, 1);
1144                                                 if ($x1 == ' ') {
1145                                                         if ($firstspace == -1) $firstspace = $i;
1146                                                 } else if ($x2 == ' ') {
1147                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1148                                                 } else {
1149                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1150                                                 }
1151                                         }
1152                                         $i++;
1153                                 }
1154
1155                                 # If there is a single-letter word, use it!
1156                                 if ($firstsingleletterword > -1)
1157                                 {
1158                                         $arr [ $firstsingleletterword ] = "''";
1159                                         $arr [ $firstsingleletterword-1 ] .= "'";
1160                                 }
1161                                 # If not, but there's a multi-letter word, use that one.
1162                                 else if ($firstmultiletterword > -1)
1163                                 {
1164                                         $arr [ $firstmultiletterword ] = "''";
1165                                         $arr [ $firstmultiletterword-1 ] .= "'";
1166                                 }
1167                                 # ... otherwise use the first one that has neither.
1168                                 # (notice that it is possible for all three to be -1 if, for example,
1169                                 # there is only one pentuple-apostrophe in the line)
1170                                 else if ($firstspace > -1)
1171                                 {
1172                                         $arr [ $firstspace ] = "''";
1173                                         $arr [ $firstspace-1 ] .= "'";
1174                                 }
1175                         }
1176
1177                         # Now let's actually convert our apostrophic mush to HTML!
1178                         $output = '';
1179                         $buffer = '';
1180                         $state = '';
1181                         $i = 0;
1182                         foreach ($arr as $r)
1183                         {
1184                                 if (($i % 2) == 0)
1185                                 {
1186                                         if ($state == 'both')
1187                                                 $buffer .= $r;
1188                                         else
1189                                                 $output .= $r;
1190                                 }
1191                                 else
1192                                 {
1193                                         if (strlen ($r) == 2)
1194                                         {
1195                                                 if ($state == 'i')
1196                                                 { $output .= '</i>'; $state = ''; }
1197                                                 else if ($state == 'bi')
1198                                                 { $output .= '</i>'; $state = 'b'; }
1199                                                 else if ($state == 'ib')
1200                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1201                                                 else if ($state == 'both')
1202                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1203                                                 else # $state can be 'b' or ''
1204                                                 { $output .= '<i>'; $state .= 'i'; }
1205                                         }
1206                                         else if (strlen ($r) == 3)
1207                                         {
1208                                                 if ($state == 'b')
1209                                                 { $output .= '</b>'; $state = ''; }
1210                                                 else if ($state == 'bi')
1211                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1212                                                 else if ($state == 'ib')
1213                                                 { $output .= '</b>'; $state = 'i'; }
1214                                                 else if ($state == 'both')
1215                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1216                                                 else # $state can be 'i' or ''
1217                                                 { $output .= '<b>'; $state .= 'b'; }
1218                                         }
1219                                         else if (strlen ($r) == 5)
1220                                         {
1221                                                 if ($state == 'b')
1222                                                 { $output .= '</b><i>'; $state = 'i'; }
1223                                                 else if ($state == 'i')
1224                                                 { $output .= '</i><b>'; $state = 'b'; }
1225                                                 else if ($state == 'bi')
1226                                                 { $output .= '</i></b>'; $state = ''; }
1227                                                 else if ($state == 'ib')
1228                                                 { $output .= '</b></i>'; $state = ''; }
1229                                                 else if ($state == 'both')
1230                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1231                                                 else # ($state == '')
1232                                                 { $buffer = ''; $state = 'both'; }
1233                                         }
1234                                 }
1235                                 $i++;
1236                         }
1237                         # Now close all remaining tags.  Notice that the order is important.
1238                         if ($state == 'b' || $state == 'ib')
1239                                 $output .= '</b>';
1240                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1241                                 $output .= '</i>';
1242                         if ($state == 'bi')
1243                                 $output .= '</b>';
1244                         if ($state == 'both')
1245                                 $output .= '<b><i>'.$buffer.'</i></b>';
1246                         return $output;
1247                 }
1248         }
1249
1250         /**
1251          * Replace external links
1252          *
1253          * Note: this is all very hackish and the order of execution matters a lot.
1254          * Make sure to run maintenance/parserTests.php if you change this code.
1255          *
1256          * @private
1257          */
1258         function replaceExternalLinks( $text ) {
1259                 global $wgContLang;
1260                 $fname = 'Parser::replaceExternalLinks';
1261                 wfProfileIn( $fname );
1262
1263                 $sk =& $this->mOptions->getSkin();
1264
1265                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1266
1267                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1268
1269                 $i = 0;
1270                 while ( $i<count( $bits ) ) {
1271                         $url = $bits[$i++];
1272                         $protocol = $bits[$i++];
1273                         $text = $bits[$i++];
1274                         $trail = $bits[$i++];
1275
1276                         # The characters '<' and '>' (which were escaped by
1277                         # removeHTMLtags()) should not be included in
1278                         # URLs, per RFC 2396.
1279                         $m2 = array();
1280                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1281                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1282                                 $url = substr($url, 0, $m2[0][1]);
1283                         }
1284
1285                         # If the link text is an image URL, replace it with an <img> tag
1286                         # This happened by accident in the original parser, but some people used it extensively
1287                         $img = $this->maybeMakeExternalImage( $text );
1288                         if ( $img !== false ) {
1289                                 $text = $img;
1290                         }
1291
1292                         $dtrail = '';
1293
1294                         # Set linktype for CSS - if URL==text, link is essentially free
1295                         $linktype = ($text == $url) ? 'free' : 'text';
1296
1297                         # No link text, e.g. [http://domain.tld/some.link]
1298                         if ( $text == '' ) {
1299                                 # Autonumber if allowed. See bug #5918
1300                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1301                                         $text = '[' . ++$this->mAutonumber . ']';
1302                                         $linktype = 'autonumber';
1303                                 } else {
1304                                         # Otherwise just use the URL
1305                                         $text = htmlspecialchars( $url );
1306                                         $linktype = 'free';
1307                                 }
1308                         } else {
1309                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1310                                 # Check for trail
1311                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1312                         }
1313
1314                         $text = $wgContLang->markNoConversion($text);
1315
1316                         $url = Sanitizer::cleanUrl( $url );
1317
1318                         # Process the trail (i.e. everything after this link up until start of the next link),
1319                         # replacing any non-bracketed links
1320                         $trail = $this->replaceFreeExternalLinks( $trail );
1321
1322                         # Use the encoded URL
1323                         # This means that users can paste URLs directly into the text
1324                         # Funny characters like &ouml; aren't valid in URLs anyway
1325                         # This was changed in August 2004
1326                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1327
1328                         # Register link in the output object.
1329                         # Replace unnecessary URL escape codes with the referenced character
1330                         # This prevents spammers from hiding links from the filters
1331                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1332                         $this->mOutput->addExternalLink( $pasteurized );
1333                 }
1334
1335                 wfProfileOut( $fname );
1336                 return $s;
1337         }
1338
1339         /**
1340          * Replace anything that looks like a URL with a link
1341          * @private
1342          */
1343         function replaceFreeExternalLinks( $text ) {
1344                 global $wgContLang;
1345                 $fname = 'Parser::replaceFreeExternalLinks';
1346                 wfProfileIn( $fname );
1347
1348                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1349                 $s = array_shift( $bits );
1350                 $i = 0;
1351
1352                 $sk =& $this->mOptions->getSkin();
1353
1354                 while ( $i < count( $bits ) ){
1355                         $protocol = $bits[$i++];
1356                         $remainder = $bits[$i++];
1357
1358                         $m = array();
1359                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1360                                 # Found some characters after the protocol that look promising
1361                                 $url = $protocol . $m[1];
1362                                 $trail = $m[2];
1363
1364                                 # special case: handle urls as url args:
1365                                 # http://www.example.com/foo?=http://www.example.com/bar
1366                                 if(strlen($trail) == 0 &&
1367                                         isset($bits[$i]) &&
1368                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1369                                         preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1370                                 {
1371                                         # add protocol, arg
1372                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1373                                         $i += 2;
1374                                         $trail = $m[2];
1375                                 }
1376
1377                                 # The characters '<' and '>' (which were escaped by
1378                                 # removeHTMLtags()) should not be included in
1379                                 # URLs, per RFC 2396.
1380                                 $m2 = array();
1381                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1382                                         $trail = substr($url, $m2[0][1]) . $trail;
1383                                         $url = substr($url, 0, $m2[0][1]);
1384                                 }
1385
1386                                 # Move trailing punctuation to $trail
1387                                 $sep = ',;\.:!?';
1388                                 # If there is no left bracket, then consider right brackets fair game too
1389                                 if ( strpos( $url, '(' ) === false ) {
1390                                         $sep .= ')';
1391                                 }
1392
1393                                 $numSepChars = strspn( strrev( $url ), $sep );
1394                                 if ( $numSepChars ) {
1395                                         $trail = substr( $url, -$numSepChars ) . $trail;
1396                                         $url = substr( $url, 0, -$numSepChars );
1397                                 }
1398
1399                                 $url = Sanitizer::cleanUrl( $url );
1400
1401                                 # Is this an external image?
1402                                 $text = $this->maybeMakeExternalImage( $url );
1403                                 if ( $text === false ) {
1404                                         # Not an image, make a link
1405                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1406                                         # Register it in the output object...
1407                                         # Replace unnecessary URL escape codes with their equivalent characters
1408                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1409                                         $this->mOutput->addExternalLink( $pasteurized );
1410                                 }
1411                                 $s .= $text . $trail;
1412                         } else {
1413                                 $s .= $protocol . $remainder;
1414                         }
1415                 }
1416                 wfProfileOut( $fname );
1417                 return $s;
1418         }
1419
1420         /**
1421          * Replace unusual URL escape codes with their equivalent characters
1422          * @param string
1423          * @return string
1424          * @static
1425          * @fixme This can merge genuinely required bits in the path or query string,
1426          *        breaking legit URLs. A proper fix would treat the various parts of
1427          *        the URL differently; as a workaround, just use the output for
1428          *        statistical records, not for actual linking/output.
1429          */
1430         static function replaceUnusualEscapes( $url ) {
1431                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1432                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1433         }
1434
1435         /**
1436          * Callback function used in replaceUnusualEscapes().
1437          * Replaces unusual URL escape codes with their equivalent character
1438          * @static
1439          * @private
1440          */
1441         private static function replaceUnusualEscapesCallback( $matches ) {
1442                 $char = urldecode( $matches[0] );
1443                 $ord = ord( $char );
1444                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1445                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1446                         // No, shouldn't be escaped
1447                         return $char;
1448                 } else {
1449                         // Yes, leave it escaped
1450                         return $matches[0];
1451                 }
1452         }
1453
1454         /**
1455          * make an image if it's allowed, either through the global
1456          * option or through the exception
1457          * @private
1458          */
1459         function maybeMakeExternalImage( $url ) {
1460                 $sk =& $this->mOptions->getSkin();
1461                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1462                 $imagesexception = !empty($imagesfrom);
1463                 $text = false;
1464                 if ( $this->mOptions->getAllowExternalImages()
1465                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1466                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1467                                 # Image found
1468                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1469                         }
1470                 }
1471                 return $text;
1472         }
1473
1474         /**
1475          * Process [[ ]] wikilinks
1476          *
1477          * @private
1478          */
1479         function replaceInternalLinks( $s ) {
1480                 global $wgContLang;
1481                 static $fname = 'Parser::replaceInternalLinks' ;
1482
1483                 wfProfileIn( $fname );
1484
1485                 wfProfileIn( $fname.'-setup' );
1486                 static $tc = FALSE;
1487                 # the % is needed to support urlencoded titles as well
1488                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1489
1490                 $sk =& $this->mOptions->getSkin();
1491
1492                 #split the entire text string on occurences of [[
1493                 $a = explode( '[[', ' ' . $s );
1494                 #get the first element (all text up to first [[), and remove the space we added
1495                 $s = array_shift( $a );
1496                 $s = substr( $s, 1 );
1497
1498                 # Match a link having the form [[namespace:link|alternate]]trail
1499                 static $e1 = FALSE;
1500                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1501                 # Match cases where there is no "]]", which might still be images
1502                 static $e1_img = FALSE;
1503                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1504                 # Match the end of a line for a word that's not followed by whitespace,
1505                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1506                 $e2 = wfMsgForContent( 'linkprefix' );
1507
1508                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1509
1510                 if( is_null( $this->mTitle ) ) {
1511                         throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
1512                 }
1513                 $nottalk = !$this->mTitle->isTalkPage();
1514
1515                 if ( $useLinkPrefixExtension ) {
1516                         $m = array();
1517                         if ( preg_match( $e2, $s, $m ) ) {
1518                                 $first_prefix = $m[2];
1519                         } else {
1520                                 $first_prefix = false;
1521                         }
1522                 } else {
1523                         $prefix = '';
1524                 }
1525
1526                 $selflink = $this->mTitle->getPrefixedText();
1527                 $useSubpages = $this->areSubpagesAllowed();
1528                 wfProfileOut( $fname.'-setup' );
1529
1530                 # Loop for each link
1531                 for ($k = 0; isset( $a[$k] ); $k++) {
1532                         $line = $a[$k];
1533                         if ( $useLinkPrefixExtension ) {
1534                                 wfProfileIn( $fname.'-prefixhandling' );
1535                                 if ( preg_match( $e2, $s, $m ) ) {
1536                                         $prefix = $m[2];
1537                                         $s = $m[1];
1538                                 } else {
1539                                         $prefix='';
1540                                 }
1541                                 # first link
1542                                 if($first_prefix) {
1543                                         $prefix = $first_prefix;
1544                                         $first_prefix = false;
1545                                 }
1546                                 wfProfileOut( $fname.'-prefixhandling' );
1547                         }
1548
1549                         $might_be_img = false;
1550
1551                         wfProfileIn( "$fname-e1" );
1552                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1553                                 $text = $m[2];
1554                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1555                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1556                                 # the real problem is with the $e1 regex
1557                                 # See bug 1300.
1558                                 #
1559                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1560                                 # and no image is in sight. See bug 2095.
1561                                 #
1562                                 if( $text !== '' &&
1563                                         substr( $m[3], 0, 1 ) === ']' &&
1564                                         strpos($text, '[') !== false
1565                                 )
1566                                 {
1567                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1568                                         $m[3] = substr( $m[3], 1 );
1569                                 }
1570                                 # fix up urlencoded title texts
1571                                 if( strpos( $m[1], '%' ) !== false ) {
1572                                         # Should anchors '#' also be rejected?
1573                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1574                                 }
1575                                 $trail = $m[3];
1576                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1577                                 $might_be_img = true;
1578                                 $text = $m[2];
1579                                 if ( strpos( $m[1], '%' ) !== false ) {
1580                                        $m[1] = urldecode($m[1]);
1581                                 }
1582                                 $trail = "";
1583                         } else { # Invalid form; output directly
1584                                 $s .= $prefix . '[[' . $line ;
1585                                 wfProfileOut( "$fname-e1" );
1586                                 continue;
1587                         }
1588                         wfProfileOut( "$fname-e1" );
1589                         wfProfileIn( "$fname-misc" );
1590
1591                         # Don't allow internal links to pages containing
1592                         # PROTO: where PROTO is a valid URL protocol; these
1593                         # should be external links.
1594                         if (preg_match('/^(\b(?:' . wfUrlProtocols() . '))/', $m[1])) {
1595                                 $s .= $prefix . '[[' . $line ;
1596                                 continue;
1597                         }
1598
1599                         # Make subpage if necessary
1600                         if( $useSubpages ) {
1601                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1602                         } else {
1603                                 $link = $m[1];
1604                         }
1605
1606                         $noforce = (substr($m[1], 0, 1) != ':');
1607                         if (!$noforce) {
1608                                 # Strip off leading ':'
1609                                 $link = substr($link, 1);
1610                         }
1611
1612                         wfProfileOut( "$fname-misc" );
1613                         wfProfileIn( "$fname-title" );
1614                         $nt = Title::newFromText( $this->unstripNoWiki($link, $this->mStripState) );
1615                         if( !$nt ) {
1616                                 $s .= $prefix . '[[' . $line;
1617                                 wfProfileOut( "$fname-title" );
1618                                 continue;
1619                         }
1620
1621                         $ns = $nt->getNamespace();
1622                         $iw = $nt->getInterWiki();
1623                         wfProfileOut( "$fname-title" );
1624
1625                         if ($might_be_img) { # if this is actually an invalid link
1626                                 wfProfileIn( "$fname-might_be_img" );
1627                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1628                                         $found = false;
1629                                         while (isset ($a[$k+1]) ) {
1630                                                 #look at the next 'line' to see if we can close it there
1631                                                 $spliced = array_splice( $a, $k + 1, 1 );
1632                                                 $next_line = array_shift( $spliced );
1633                                                 $m = explode( ']]', $next_line, 3 );
1634                                                 if ( count( $m ) == 3 ) {
1635                                                         # the first ]] closes the inner link, the second the image
1636                                                         $found = true;
1637                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1638                                                         $trail = $m[2];
1639                                                         break;
1640                                                 } elseif ( count( $m ) == 2 ) {
1641                                                         #if there's exactly one ]] that's fine, we'll keep looking
1642                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1643                                                 } else {
1644                                                         #if $next_line is invalid too, we need look no further
1645                                                         $text .= '[[' . $next_line;
1646                                                         break;
1647                                                 }
1648                                         }
1649                                         if ( !$found ) {
1650                                                 # we couldn't find the end of this imageLink, so output it raw
1651                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1652                                                 $text = $this->replaceInternalLinks($text);
1653                                                 $s .= "{$prefix}[[$link|$text";
1654                                                 # note: no $trail, because without an end, there *is* no trail
1655                                                 wfProfileOut( "$fname-might_be_img" );
1656                                                 continue;
1657                                         }
1658                                 } else { #it's not an image, so output it raw
1659                                         $s .= "{$prefix}[[$link|$text";
1660                                         # note: no $trail, because without an end, there *is* no trail
1661                                         wfProfileOut( "$fname-might_be_img" );
1662                                         continue;
1663                                 }
1664                                 wfProfileOut( "$fname-might_be_img" );
1665                         }
1666
1667                         $wasblank = ( '' == $text );
1668                         if( $wasblank ) $text = $link;
1669
1670                         # Link not escaped by : , create the various objects
1671                         if( $noforce ) {
1672
1673                                 # Interwikis
1674                                 wfProfileIn( "$fname-interwiki" );
1675                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1676                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1677                                         $s = rtrim($s . "\n");
1678                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1679                                         wfProfileOut( "$fname-interwiki" );
1680                                         continue;
1681                                 }
1682                                 wfProfileOut( "$fname-interwiki" );
1683
1684                                 if ( $ns == NS_IMAGE ) {
1685                                         wfProfileIn( "$fname-image" );
1686                                         if ( !wfIsBadImage( $nt->getDBkey(), $this->mTitle ) ) {
1687                                                 # recursively parse links inside the image caption
1688                                                 # actually, this will parse them in any other parameters, too,
1689                                                 # but it might be hard to fix that, and it doesn't matter ATM
1690                                                 $text = $this->replaceExternalLinks($text);
1691                                                 $text = $this->replaceInternalLinks($text);
1692
1693                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1694                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1695                                                 $this->mOutput->addImage( $nt->getDBkey() );
1696
1697                                                 wfProfileOut( "$fname-image" );
1698                                                 continue;
1699                                         } else {
1700                                                 # We still need to record the image's presence on the page
1701                                                 $this->mOutput->addImage( $nt->getDBkey() );
1702                                         }
1703                                         wfProfileOut( "$fname-image" );
1704
1705                                 }
1706
1707                                 if ( $ns == NS_CATEGORY ) {
1708                                         wfProfileIn( "$fname-category" );
1709                                         $s = rtrim($s . "\n"); # bug 87
1710
1711                                         if ( $wasblank ) {
1712                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1713                                                         $sortkey = $this->mTitle->getText();
1714                                                 } else {
1715                                                         $sortkey = $this->mTitle->getPrefixedText();
1716                                                 }
1717                                         } else {
1718                                                 $sortkey = $text;
1719                                         }
1720                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1721                                         $sortkey = str_replace( "\n", '', $sortkey );
1722                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1723                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1724
1725                                         /**
1726                                          * Strip the whitespace Category links produce, see bug 87
1727                                          * @todo We might want to use trim($tmp, "\n") here.
1728                                          */
1729                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1730
1731                                         wfProfileOut( "$fname-category" );
1732                                         continue;
1733                                 }
1734                         }
1735
1736                         if( ( $nt->getPrefixedText() === $selflink ) &&
1737                             ( $nt->getFragment() === '' ) ) {
1738                                 # Self-links are handled specially; generally de-link and change to bold.
1739                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1740                                 continue;
1741                         }
1742
1743                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1744                         if( $ns == NS_MEDIA ) {
1745                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1746                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1747                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1748                                 $this->mOutput->addImage( $nt->getDBkey() );
1749                                 continue;
1750                         } elseif( $ns == NS_SPECIAL ) {
1751                                 $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1752                                 continue;
1753                         } elseif( $ns == NS_IMAGE ) {
1754                                 $img = new Image( $nt );
1755                                 if( $img->exists() ) {
1756                                         // Force a blue link if the file exists; may be a remote
1757                                         // upload on the shared repository, and we want to see its
1758                                         // auto-generated page.
1759                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1760                                         $this->mOutput->addLink( $nt );
1761                                         continue;
1762                                 }
1763                         }
1764                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1765                 }
1766                 wfProfileOut( $fname );
1767                 return $s;
1768         }
1769
1770         /**
1771          * Make a link placeholder. The text returned can be later resolved to a real link with
1772          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1773          * parsing of interwiki links, and secondly to allow all existence checks and
1774          * article length checks (for stub links) to be bundled into a single query.
1775          *
1776          */
1777         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1778                 wfProfileIn( __METHOD__ );
1779                 if ( ! is_object($nt) ) {
1780                         # Fail gracefully
1781                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1782                 } else {
1783                         # Separate the link trail from the rest of the link
1784                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1785
1786                         if ( $nt->isExternal() ) {
1787                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1788                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1789                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1790                         } else {
1791                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1792                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1793                                 $this->mLinkHolders['queries'][] = $query;
1794                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1795                                 $this->mLinkHolders['titles'][] = $nt;
1796
1797                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1798                         }
1799                 }
1800                 wfProfileOut( __METHOD__ );
1801                 return $retVal;
1802         }
1803
1804         /**
1805          * Render a forced-blue link inline; protect against double expansion of
1806          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1807          * Since this little disaster has to split off the trail text to avoid
1808          * breaking URLs in the following text without breaking trails on the
1809          * wiki links, it's been made into a horrible function.
1810          *
1811          * @param Title $nt
1812          * @param string $text
1813          * @param string $query
1814          * @param string $trail
1815          * @param string $prefix
1816          * @return string HTML-wikitext mix oh yuck
1817          */
1818         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1819                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1820                 $sk =& $this->mOptions->getSkin();
1821                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1822                 return $this->armorLinks( $link ) . $trail;
1823         }
1824
1825         /**
1826          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1827          * going to go through further parsing steps before inline URL expansion.
1828          *
1829          * In particular this is important when using action=render, which causes
1830          * full URLs to be included.
1831          *
1832          * Oh man I hate our multi-layer parser!
1833          *
1834          * @param string more-or-less HTML
1835          * @return string less-or-more HTML with NOPARSE bits
1836          */
1837         function armorLinks( $text ) {
1838                 return preg_replace( "/\b(" . wfUrlProtocols() . ')/',
1839                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1840         }
1841
1842         /**
1843          * Return true if subpage links should be expanded on this page.
1844          * @return bool
1845          */
1846         function areSubpagesAllowed() {
1847                 # Some namespaces don't allow subpages
1848                 global $wgNamespacesWithSubpages;
1849                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1850         }
1851
1852         /**
1853          * Handle link to subpage if necessary
1854          * @param string $target the source of the link
1855          * @param string &$text the link text, modified as necessary
1856          * @return string the full name of the link
1857          * @private
1858          */
1859         function maybeDoSubpageLink($target, &$text) {
1860                 # Valid link forms:
1861                 # Foobar -- normal
1862                 # :Foobar -- override special treatment of prefix (images, language links)
1863                 # /Foobar -- convert to CurrentPage/Foobar
1864                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1865                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1866                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1867
1868                 $fname = 'Parser::maybeDoSubpageLink';
1869                 wfProfileIn( $fname );
1870                 $ret = $target; # default return value is no change
1871
1872                 # bug 7425
1873                 $target = trim( $target );
1874
1875                 # Some namespaces don't allow subpages,
1876                 # so only perform processing if subpages are allowed
1877                 if( $this->areSubpagesAllowed() ) {
1878                         # Look at the first character
1879                         if( $target != '' && $target{0} == '/' ) {
1880                                 # / at end means we don't want the slash to be shown
1881                                 if( substr( $target, -1, 1 ) == '/' ) {
1882                                         $target = substr( $target, 1, -1 );
1883                                         $noslash = $target;
1884                                 } else {
1885                                         $noslash = substr( $target, 1 );
1886                                 }
1887
1888                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1889                                 if( '' === $text ) {
1890                                         $text = $target;
1891                                 } # this might be changed for ugliness reasons
1892                         } else {
1893                                 # check for .. subpage backlinks
1894                                 $dotdotcount = 0;
1895                                 $nodotdot = $target;
1896                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1897                                         ++$dotdotcount;
1898                                         $nodotdot = substr( $nodotdot, 3 );
1899                                 }
1900                                 if($dotdotcount > 0) {
1901                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1902                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1903                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1904                                                 # / at the end means don't show full path
1905                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1906                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1907                                                         if( '' === $text ) {
1908                                                                 $text = $nodotdot;
1909                                                         }
1910                                                 }
1911                                                 $nodotdot = trim( $nodotdot );
1912                                                 if( $nodotdot != '' ) {
1913                                                         $ret .= '/' . $nodotdot;
1914                                                 }
1915                                         }
1916                                 }
1917                         }
1918                 }
1919
1920                 wfProfileOut( $fname );
1921                 return $ret;
1922         }
1923
1924         /**#@+
1925          * Used by doBlockLevels()
1926          * @private
1927          */
1928         /* private */ function closeParagraph() {
1929                 $result = '';
1930                 if ( '' != $this->mLastSection ) {
1931                         $result = '</' . $this->mLastSection  . ">\n";
1932                 }
1933                 $this->mInPre = false;
1934                 $this->mLastSection = '';
1935                 return $result;
1936         }
1937         # getCommon() returns the length of the longest common substring
1938         # of both arguments, starting at the beginning of both.
1939         #
1940         /* private */ function getCommon( $st1, $st2 ) {
1941                 $fl = strlen( $st1 );
1942                 $shorter = strlen( $st2 );
1943                 if ( $fl < $shorter ) { $shorter = $fl; }
1944
1945                 for ( $i = 0; $i < $shorter; ++$i ) {
1946                         if ( $st1{$i} != $st2{$i} ) { break; }
1947                 }
1948                 return $i;
1949         }
1950         # These next three functions open, continue, and close the list
1951         # element appropriate to the prefix character passed into them.
1952         #
1953         /* private */ function openList( $char ) {
1954                 $result = $this->closeParagraph();
1955
1956                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1957                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1958                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1959                 else if ( ';' == $char ) {
1960                         $result .= '<dl><dt>';
1961                         $this->mDTopen = true;
1962                 }
1963                 else { $result = '<!-- ERR 1 -->'; }
1964
1965                 return $result;
1966         }
1967
1968         /* private */ function nextItem( $char ) {
1969                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1970                 else if ( ':' == $char || ';' == $char ) {
1971                         $close = '</dd>';
1972                         if ( $this->mDTopen ) { $close = '</dt>'; }
1973                         if ( ';' == $char ) {
1974                                 $this->mDTopen = true;
1975                                 return $close . '<dt>';
1976                         } else {
1977                                 $this->mDTopen = false;
1978                                 return $close . '<dd>';
1979                         }
1980                 }
1981                 return '<!-- ERR 2 -->';
1982         }
1983
1984         /* private */ function closeList( $char ) {
1985                 if ( '*' == $char ) { $text = '</li></ul>'; }
1986                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1987                 else if ( ':' == $char ) {
1988                         if ( $this->mDTopen ) {
1989                                 $this->mDTopen = false;
1990                                 $text = '</dt></dl>';
1991                         } else {
1992                                 $text = '</dd></dl>';
1993                         }
1994                 }
1995                 else {  return '<!-- ERR 3 -->'; }
1996                 return $text."\n";
1997         }
1998         /**#@-*/
1999
2000         /**
2001          * Make lists from lines starting with ':', '*', '#', etc.
2002          *
2003          * @private
2004          * @return string the lists rendered as HTML
2005          */
2006         function doBlockLevels( $text, $linestart ) {
2007                 $fname = 'Parser::doBlockLevels';
2008                 wfProfileIn( $fname );
2009
2010                 # Parsing through the text line by line.  The main thing
2011                 # happening here is handling of block-level elements p, pre,
2012                 # and making lists from lines starting with * # : etc.
2013                 #
2014                 $textLines = explode( "\n", $text );
2015
2016                 $lastPrefix = $output = '';
2017                 $this->mDTopen = $inBlockElem = false;
2018                 $prefixLength = 0;
2019                 $paragraphStack = false;
2020
2021                 if ( !$linestart ) {
2022                         $output .= array_shift( $textLines );
2023                 }
2024                 foreach ( $textLines as $oLine ) {
2025                         $lastPrefixLength = strlen( $lastPrefix );
2026                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
2027                         $preOpenMatch = preg_match('/<pre/i', $oLine );
2028                         if ( !$this->mInPre ) {
2029                                 # Multiple prefixes may abut each other for nested lists.
2030                                 $prefixLength = strspn( $oLine, '*#:;' );
2031                                 $pref = substr( $oLine, 0, $prefixLength );
2032
2033                                 # eh?
2034                                 $pref2 = str_replace( ';', ':', $pref );
2035                                 $t = substr( $oLine, $prefixLength );
2036                                 $this->mInPre = !empty($preOpenMatch);
2037                         } else {
2038                                 # Don't interpret any other prefixes in preformatted text
2039                                 $prefixLength = 0;
2040                                 $pref = $pref2 = '';
2041                                 $t = $oLine;
2042                         }
2043
2044                         # List generation
2045                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
2046                                 # Same as the last item, so no need to deal with nesting or opening stuff
2047                                 $output .= $this->nextItem( substr( $pref, -1 ) );
2048                                 $paragraphStack = false;
2049
2050                                 if ( substr( $pref, -1 ) == ';') {
2051                                         # The one nasty exception: definition lists work like this:
2052                                         # ; title : definition text
2053                                         # So we check for : in the remainder text to split up the
2054                                         # title and definition, without b0rking links.
2055                                         $term = $t2 = '';
2056                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2057                                                 $t = $t2;
2058                                                 $output .= $term . $this->nextItem( ':' );
2059                                         }
2060                                 }
2061                         } elseif( $prefixLength || $lastPrefixLength ) {
2062                                 # Either open or close a level...
2063                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
2064                                 $paragraphStack = false;
2065
2066                                 while( $commonPrefixLength < $lastPrefixLength ) {
2067                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
2068                                         --$lastPrefixLength;
2069                                 }
2070                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
2071                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
2072                                 }
2073                                 while ( $prefixLength > $commonPrefixLength ) {
2074                                         $char = substr( $pref, $commonPrefixLength, 1 );
2075                                         $output .= $this->openList( $char );
2076
2077                                         if ( ';' == $char ) {
2078                                                 # FIXME: This is dupe of code above
2079                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2080                                                         $t = $t2;
2081                                                         $output .= $term . $this->nextItem( ':' );
2082                                                 }
2083                                         }
2084                                         ++$commonPrefixLength;
2085                                 }
2086                                 $lastPrefix = $pref2;
2087                         }
2088                         if( 0 == $prefixLength ) {
2089                                 wfProfileIn( "$fname-paragraph" );
2090                                 # No prefix (not in list)--go to paragraph mode
2091                                 // XXX: use a stack for nestable elements like span, table and div
2092                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|<\\/center|<\\/tr|<\\/td|<\\/th)/iS', $t );
2093                                 $closematch = preg_match(
2094                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
2095                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul|<\\/ol|<center)/iS', $t );
2096                                 if ( $openmatch or $closematch ) {
2097                                         $paragraphStack = false;
2098                                         # TODO bug 5718: paragraph closed
2099                                         $output .= $this->closeParagraph();
2100                                         if ( $preOpenMatch and !$preCloseMatch ) {
2101                                                 $this->mInPre = true;
2102                                         }
2103                                         if ( $closematch ) {
2104                                                 $inBlockElem = false;
2105                                         } else {
2106                                                 $inBlockElem = true;
2107                                         }
2108                                 } else if ( !$inBlockElem && !$this->mInPre ) {
2109                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
2110                                                 // pre
2111                                                 if ($this->mLastSection != 'pre') {
2112                                                         $paragraphStack = false;
2113                                                         $output .= $this->closeParagraph().'<pre>';
2114                                                         $this->mLastSection = 'pre';
2115                                                 }
2116                                                 $t = substr( $t, 1 );
2117                                         } else {
2118                                                 // paragraph
2119                                                 if ( '' == trim($t) ) {
2120                                                         if ( $paragraphStack ) {
2121                                                                 $output .= $paragraphStack.'<br />';
2122                                                                 $paragraphStack = false;
2123                                                                 $this->mLastSection = 'p';
2124                                                         } else {
2125                                                                 if ($this->mLastSection != 'p' ) {
2126                                                                         $output .= $this->closeParagraph();
2127                                                                         $this->mLastSection = '';
2128                                                                         $paragraphStack = '<p>';
2129                                                                 } else {
2130                                                                         $paragraphStack = '</p><p>';
2131                                                                 }
2132                                                         }
2133                                                 } else {
2134                                                         if ( $paragraphStack ) {
2135                                                                 $output .= $paragraphStack;
2136                                                                 $paragraphStack = false;
2137                                                                 $this->mLastSection = 'p';
2138                                                         } else if ($this->mLastSection != 'p') {
2139                                                                 $output .= $this->closeParagraph().'<p>';
2140                                                                 $this->mLastSection = 'p';
2141                                                         }
2142                                                 }
2143                                         }
2144                                 }
2145                                 wfProfileOut( "$fname-paragraph" );
2146                         }
2147                         // somewhere above we forget to get out of pre block (bug 785)
2148                         if($preCloseMatch && $this->mInPre) {
2149                                 $this->mInPre = false;
2150                         }
2151                         if ($paragraphStack === false) {
2152                                 $output .= $t."\n";
2153                         }
2154                 }
2155                 while ( $prefixLength ) {
2156                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2157                         --$prefixLength;
2158                 }
2159                 if ( '' != $this->mLastSection ) {
2160                         $output .= '</' . $this->mLastSection . '>';
2161                         $this->mLastSection = '';
2162                 }
2163
2164                 wfProfileOut( $fname );
2165                 return $output;
2166         }
2167
2168         /**
2169          * Split up a string on ':', ignoring any occurences inside tags
2170          * to prevent illegal overlapping.
2171          * @param string $str the string to split
2172          * @param string &$before set to everything before the ':'
2173          * @param string &$after set to everything after the ':'
2174          * return string the position of the ':', or false if none found
2175          */
2176         function findColonNoLinks($str, &$before, &$after) {
2177                 $fname = 'Parser::findColonNoLinks';
2178                 wfProfileIn( $fname );
2179
2180                 $pos = strpos( $str, ':' );
2181                 if( $pos === false ) {
2182                         // Nothing to find!
2183                         wfProfileOut( $fname );
2184                         return false;
2185                 }
2186
2187                 $lt = strpos( $str, '<' );
2188                 if( $lt === false || $lt > $pos ) {
2189                         // Easy; no tag nesting to worry about
2190                         $before = substr( $str, 0, $pos );
2191                         $after = substr( $str, $pos+1 );
2192                         wfProfileOut( $fname );
2193                         return $pos;
2194                 }
2195
2196                 // Ugly state machine to walk through avoiding tags.
2197                 $state = MW_COLON_STATE_TEXT;
2198                 $stack = 0;
2199                 $len = strlen( $str );
2200                 for( $i = 0; $i < $len; $i++ ) {
2201                         $c = $str{$i};
2202
2203                         switch( $state ) {
2204                         // (Using the number is a performance hack for common cases)
2205                         case 0: // MW_COLON_STATE_TEXT:
2206                                 switch( $c ) {
2207                                 case "<":
2208                                         // Could be either a <start> tag or an </end> tag
2209                                         $state = MW_COLON_STATE_TAGSTART;
2210                                         break;
2211                                 case ":":
2212                                         if( $stack == 0 ) {
2213                                                 // We found it!
2214                                                 $before = substr( $str, 0, $i );
2215                                                 $after = substr( $str, $i + 1 );
2216                                                 wfProfileOut( $fname );
2217                                                 return $i;
2218                                         }
2219                                         // Embedded in a tag; don't break it.
2220                                         break;
2221                                 default:
2222                                         // Skip ahead looking for something interesting
2223                                         $colon = strpos( $str, ':', $i );
2224                                         if( $colon === false ) {
2225                                                 // Nothing else interesting
2226                                                 wfProfileOut( $fname );
2227                                                 return false;
2228                                         }
2229                                         $lt = strpos( $str, '<', $i );
2230                                         if( $stack === 0 ) {
2231                                                 if( $lt === false || $colon < $lt ) {
2232                                                         // We found it!
2233                                                         $before = substr( $str, 0, $colon );
2234                                                         $after = substr( $str, $colon + 1 );
2235                                                         wfProfileOut( $fname );
2236                                                         return $i;
2237                                                 }
2238                                         }
2239                                         if( $lt === false ) {
2240                                                 // Nothing else interesting to find; abort!
2241                                                 // We're nested, but there's no close tags left. Abort!
2242                                                 break 2;
2243                                         }
2244                                         // Skip ahead to next tag start
2245                                         $i = $lt;
2246                                         $state = MW_COLON_STATE_TAGSTART;
2247                                 }
2248                                 break;
2249                         case 1: // MW_COLON_STATE_TAG:
2250                                 // In a <tag>
2251                                 switch( $c ) {
2252                                 case ">":
2253                                         $stack++;
2254                                         $state = MW_COLON_STATE_TEXT;
2255                                         break;
2256                                 case "/":
2257                                         // Slash may be followed by >?
2258                                         $state = MW_COLON_STATE_TAGSLASH;
2259                                         break;
2260                                 default:
2261                                         // ignore
2262                                 }
2263                                 break;
2264                         case 2: // MW_COLON_STATE_TAGSTART:
2265                                 switch( $c ) {
2266                                 case "/":
2267                                         $state = MW_COLON_STATE_CLOSETAG;
2268                                         break;
2269                                 case "!":
2270                                         $state = MW_COLON_STATE_COMMENT;
2271                                         break;
2272                                 case ">":
2273                                         // Illegal early close? This shouldn't happen D:
2274                                         $state = MW_COLON_STATE_TEXT;
2275                                         break;
2276                                 default:
2277                                         $state = MW_COLON_STATE_TAG;
2278                                 }
2279                                 break;
2280                         case 3: // MW_COLON_STATE_CLOSETAG:
2281                                 // In a </tag>
2282                                 if( $c == ">" ) {
2283                                         $stack--;
2284                                         if( $stack < 0 ) {
2285                                                 wfDebug( "Invalid input in $fname; too many close tags\n" );
2286                                                 wfProfileOut( $fname );
2287                                                 return false;
2288                                         }
2289                                         $state = MW_COLON_STATE_TEXT;
2290                                 }
2291                                 break;
2292                         case MW_COLON_STATE_TAGSLASH:
2293                                 if( $c == ">" ) {
2294                                         // Yes, a self-closed tag <blah/>
2295                                         $state = MW_COLON_STATE_TEXT;
2296                                 } else {
2297                                         // Probably we're jumping the gun, and this is an attribute
2298                                         $state = MW_COLON_STATE_TAG;
2299                                 }
2300                                 break;
2301                         case 5: // MW_COLON_STATE_COMMENT:
2302                                 if( $c == "-" ) {
2303                                         $state = MW_COLON_STATE_COMMENTDASH;
2304                                 }
2305                                 break;
2306                         case MW_COLON_STATE_COMMENTDASH:
2307                                 if( $c == "-" ) {
2308                                         $state = MW_COLON_STATE_COMMENTDASHDASH;
2309                                 } else {
2310                                         $state = MW_COLON_STATE_COMMENT;
2311                                 }
2312                                 break;
2313                         case MW_COLON_STATE_COMMENTDASHDASH:
2314                                 if( $c == ">" ) {
2315                                         $state = MW_COLON_STATE_TEXT;
2316                                 } else {
2317                                         $state = MW_COLON_STATE_COMMENT;
2318                                 }
2319                                 break;
2320                         default:
2321                                 throw new MWException( "State machine error in $fname" );
2322                         }
2323                 }
2324                 if( $stack > 0 ) {
2325                         wfDebug( "Invalid input in $fname; not enough close tags (stack $stack, state $state)\n" );
2326                         return false;
2327                 }
2328                 wfProfileOut( $fname );
2329                 return false;
2330         }
2331
2332         /**
2333          * Return value of a magic variable (like PAGENAME)
2334          *
2335          * @private
2336          */
2337         function getVariableValue( $index ) {
2338                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2339
2340                 /**
2341                  * Some of these require message or data lookups and can be
2342                  * expensive to check many times.
2343                  */
2344                 static $varCache = array();
2345                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$varCache ) ) ) {
2346                         if ( isset( $varCache[$index] ) ) {
2347                                 return $varCache[$index];
2348                         }
2349                 }
2350
2351                 $ts = time();
2352                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2353
2354                 # Use the time zone
2355                 global $wgLocaltimezone;
2356                 if ( isset( $wgLocaltimezone ) ) {
2357                         $oldtz = getenv( 'TZ' );
2358                         putenv( 'TZ='.$wgLocaltimezone );
2359                 }
2360                 $localTimestamp = date( 'YmdHis', $ts );
2361                 $localMonth = date( 'm', $ts );
2362                 $localMonthName = date( 'n', $ts );
2363                 $localDay = date( 'j', $ts );
2364                 $localDay2 = date( 'd', $ts );
2365                 $localDayOfWeek = date( 'w', $ts );
2366                 $localWeek = date( 'W', $ts );
2367                 $localYear = date( 'Y', $ts );
2368                 $localHour = date( 'H', $ts );
2369                 if ( isset( $wgLocaltimezone ) ) {
2370                         putenv( 'TZ='.$oldtz );
2371                 }
2372
2373                 switch ( $index ) {
2374                         case 'currentmonth':
2375                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm', $ts ) );
2376                         case 'currentmonthname':
2377                                 return $varCache[$index] = $wgContLang->getMonthName( date( 'n', $ts ) );
2378                         case 'currentmonthnamegen':
2379                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date( 'n', $ts ) );
2380                         case 'currentmonthabbrev':
2381                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date( 'n', $ts ) );
2382                         case 'currentday':
2383                                 return $varCache[$index] = $wgContLang->formatNum( date( 'j', $ts ) );
2384                         case 'currentday2':
2385                                 return $varCache[$index] = $wgContLang->formatNum( date( 'd', $ts ) );
2386                         case 'localmonth':
2387                                 return $varCache[$index] = $wgContLang->formatNum( $localMonth );
2388                         case 'localmonthname':
2389                                 return $varCache[$index] = $wgContLang->getMonthName( $localMonthName );
2390                         case 'localmonthnamegen':
2391                                 return $varCache[$index] = $wgContLang->getMonthNameGen( $localMonthName );
2392                         case 'localmonthabbrev':
2393                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( $localMonthName );
2394                         case 'localday':
2395                                 return $varCache[$index] = $wgContLang->formatNum( $localDay );
2396                         case 'localday2':
2397                                 return $varCache[$index] = $wgContLang->formatNum( $localDay2 );
2398                         case 'pagename':
2399                                 return $this->mTitle->getText();
2400                         case 'pagenamee':
2401                                 return $this->mTitle->getPartialURL();
2402                         case 'fullpagename':
2403                                 return $this->mTitle->getPrefixedText();
2404                         case 'fullpagenamee':
2405                                 return $this->mTitle->getPrefixedURL();
2406                         case 'subpagename':
2407                                 return $this->mTitle->getSubpageText();
2408                         case 'subpagenamee':
2409                                 return $this->mTitle->getSubpageUrlForm();
2410                         case 'basepagename':
2411                                 return $this->mTitle->getBaseText();
2412                         case 'basepagenamee':
2413                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2414                         case 'talkpagename':
2415                                 if( $this->mTitle->canTalk() ) {
2416                                         $talkPage = $this->mTitle->getTalkPage();
2417                                         return $talkPage->getPrefixedText();
2418                                 } else {
2419                                         return '';
2420                                 }
2421                         case 'talkpagenamee':
2422                                 if( $this->mTitle->canTalk() ) {
2423                                         $talkPage = $this->mTitle->getTalkPage();
2424                                         return $talkPage->getPrefixedUrl();
2425                                 } else {
2426                                         return '';
2427                                 }
2428                         case 'subjectpagename':
2429                                 $subjPage = $this->mTitle->getSubjectPage();
2430                                 return $subjPage->getPrefixedText();
2431                         case 'subjectpagenamee':
2432                                 $subjPage = $this->mTitle->getSubjectPage();
2433                                 return $subjPage->getPrefixedUrl();
2434                         case 'revisionid':
2435                                 return $this->mRevisionId;
2436                         case 'revisionday':
2437                                 return intval( substr( wfRevisionTimestamp( $this->mRevisionId ), 6, 2 ) );
2438                         case 'revisionday2':
2439                                 return substr( wfRevisionTimestamp( $this->mRevisionId ), 6, 2 );
2440                         case 'revisionmonth':
2441                                 return intval( substr( wfRevisionTimestamp( $this->mRevisionId ), 4, 2 ) );
2442                         case 'revisionyear':
2443                                 return substr( wfRevisionTimestamp( $this->mRevisionId ), 0, 4 );
2444                         case 'revisiontimestamp':
2445                                 return wfRevisionTimestamp( $this->mRevisionId );
2446                         case 'namespace':
2447                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2448                         case 'namespacee':
2449                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2450                         case 'talkspace':
2451                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2452                         case 'talkspacee':
2453                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2454                         case 'subjectspace':
2455                                 return $this->mTitle->getSubjectNsText();
2456                         case 'subjectspacee':
2457                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2458                         case 'currentdayname':
2459                                 return $varCache[$index] = $wgContLang->getWeekdayName( date( 'w', $ts ) + 1 );
2460                         case 'currentyear':
2461                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y', $ts ), true );
2462                         case 'currenttime':
2463                                 return $varCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2464                         case 'currenthour':
2465                                 return $varCache[$index] = $wgContLang->formatNum( date( 'H', $ts ), true );
2466                         case 'currentweek':
2467                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2468                                 // int to remove the padding
2469                                 return $varCache[$index] = $wgContLang->formatNum( (int)date( 'W', $ts ) );
2470                         case 'currentdow':
2471                                 return $varCache[$index] = $wgContLang->formatNum( date( 'w', $ts ) );
2472                         case 'localdayname':
2473                                 return $varCache[$index] = $wgContLang->getWeekdayName( $localDayOfWeek + 1 );
2474                         case 'localyear':
2475                                 return $varCache[$index] = $wgContLang->formatNum( $localYear, true );
2476                         case 'localtime':
2477                                 return $varCache[$index] = $wgContLang->time( $localTimestamp, false, false );
2478                         case 'localhour':
2479                                 return $varCache[$index] = $wgContLang->formatNum( $localHour, true );
2480                         case 'localweek':
2481                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2482                                 // int to remove the padding
2483                                 return $varCache[$index] = $wgContLang->formatNum( (int)$localWeek );
2484                         case 'localdow':
2485                                 return $varCache[$index] = $wgContLang->formatNum( $localDayOfWeek );
2486                         case 'numberofarticles':
2487                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfArticles() );
2488                         case 'numberoffiles':
2489                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfFiles() );
2490                         case 'numberofusers':
2491                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfUsers() );
2492                         case 'numberofpages':
2493                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfPages() );
2494                         case 'numberofadmins':
2495                                 return $varCache[$index]  = $wgContLang->formatNum( wfNumberOfAdmins() );
2496                         case 'currenttimestamp':
2497                                 return $varCache[$index] = wfTimestampNow();
2498                         case 'localtimestamp':
2499                                 return $varCache[$index] = $localTimestamp;
2500                         case 'currentversion':
2501                                 return $varCache[$index] = SpecialVersion::getVersion();
2502                         case 'sitename':
2503                                 return $wgSitename;
2504                         case 'server':
2505                                 return $wgServer;
2506                         case 'servername':
2507                                 return $wgServerName;
2508                         case 'scriptpath':
2509                                 return $wgScriptPath;
2510                         case 'directionmark':
2511                                 return $wgContLang->getDirMark();
2512                         case 'contentlanguage':
2513                                 global $wgContLanguageCode;
2514                                 return $wgContLanguageCode;
2515                         default:
2516                                 $ret = null;
2517                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$varCache, &$index, &$ret ) ) )
2518                                         return $ret;
2519                                 else
2520                                         return null;
2521                 }
2522         }
2523
2524         /**
2525          * initialise the magic variables (like CURRENTMONTHNAME)
2526          *
2527          * @private
2528          */
2529         function initialiseVariables() {
2530                 $fname = 'Parser::initialiseVariables';
2531                 wfProfileIn( $fname );
2532                 $variableIDs = MagicWord::getVariableIDs();
2533
2534                 $this->mVariables = array();
2535                 foreach ( $variableIDs as $id ) {
2536                         $mw =& MagicWord::get( $id );
2537                         $mw->addToArray( $this->mVariables, $id );
2538                 }
2539                 wfProfileOut( $fname );
2540         }
2541
2542         /**
2543          * parse any parentheses in format ((title|part|part))
2544          * and call callbacks to get a replacement text for any found piece
2545          *
2546          * @param string $text The text to parse
2547          * @param array $callbacks rules in form:
2548          *     '{' => array(                            # opening parentheses
2549          *                                      'end' => '}',   # closing parentheses
2550          *                                      'cb' => array(2 => callback,    # replacement callback to call if {{..}} is found
2551          *                                                                3 => callback         # replacement callback to call if {{{..}}} is found
2552          *                                                                )
2553          *                                      )
2554          *                                      'min' => 2,     # Minimum parenthesis count in cb
2555          *                                      'max' => 3,     # Maximum parenthesis count in cb
2556          * @private
2557          */
2558         function replace_callback ($text, $callbacks) {
2559                 wfProfileIn( __METHOD__ );
2560                 $openingBraceStack = array();   # this array will hold a stack of parentheses which are not closed yet
2561                 $lastOpeningBrace = -1;                 # last not closed parentheses
2562
2563                 $validOpeningBraces = implode( '', array_keys( $callbacks ) );
2564
2565                 $i = 0;
2566                 while ( $i < strlen( $text ) ) {
2567                         # Find next opening brace, closing brace or pipe
2568                         if ( $lastOpeningBrace == -1 ) {
2569                                 $currentClosing = '';
2570                                 $search = $validOpeningBraces;
2571                         } else {
2572                                 $currentClosing = $openingBraceStack[$lastOpeningBrace]['braceEnd'];
2573                                 $search = $validOpeningBraces . '|' . $currentClosing;
2574                         }
2575                         $rule = null;
2576                         $i += strcspn( $text, $search, $i );
2577                         if ( $i < strlen( $text ) ) {
2578                                 if ( $text[$i] == '|' ) {
2579                                         $found = 'pipe';
2580                                 } elseif ( $text[$i] == $currentClosing ) {
2581                                         $found = 'close';
2582                                 } elseif ( isset( $callbacks[$text[$i]] ) ) {
2583                                         $found = 'open';
2584                                         $rule = $callbacks[$text[$i]];
2585                                 } else {
2586                                         # Some versions of PHP have a strcspn which stops on null characters
2587                                         # Ignore and continue
2588                                         ++$i;
2589                                         continue;
2590                                 }
2591                         } else {
2592                                 # All done
2593                                 break;
2594                         }
2595
2596                         if ( $found == 'open' ) {
2597                                 # found opening brace, let's add it to parentheses stack
2598                                 $piece = array('brace' => $text[$i],
2599                                                            'braceEnd' => $rule['end'],
2600                                                            'title' => '',
2601                                                            'parts' => null);
2602
2603                                 # count opening brace characters
2604                                 $piece['count'] = strspn( $text, $piece['brace'], $i );
2605                                 $piece['startAt'] = $piece['partStart'] = $i + $piece['count'];
2606                                 $i += $piece['count'];
2607
2608                                 # we need to add to stack only if opening brace count is enough for one of the rules
2609                                 if ( $piece['count'] >= $rule['min'] ) {
2610                                         $lastOpeningBrace ++;
2611                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2612                                 }
2613                         } elseif ( $found == 'close' ) {
2614                                 # lets check if it is enough characters for closing brace
2615                                 $maxCount = $openingBraceStack[$lastOpeningBrace]['count'];
2616                                 $count = strspn( $text, $text[$i], $i, $maxCount );
2617
2618                                 # check for maximum matching characters (if there are 5 closing
2619                                 # characters, we will probably need only 3 - depending on the rules)
2620                                 $matchingCount = 0;
2621                                 $matchingCallback = null;
2622                                 $cbType = $callbacks[$openingBraceStack[$lastOpeningBrace]['brace']];
2623                                 if ( $count > $cbType['max'] ) {
2624                                         # The specified maximum exists in the callback array, unless the caller
2625                                         # has made an error
2626                                         $matchingCount = $cbType['max'];
2627                                 } else {
2628                                         # Count is less than the maximum
2629                                         # Skip any gaps in the callback array to find the true largest match
2630                                         # Need to use array_key_exists not isset because the callback can be null
2631                                         $matchingCount = $count;
2632                                         while ( $matchingCount > 0 && !array_key_exists( $matchingCount, $cbType['cb'] ) ) {
2633                                                 --$matchingCount;
2634                                         }
2635                                 }
2636
2637                                 if ($matchingCount <= 0) {
2638                                         $i += $count;
2639                                         continue;
2640                                 }
2641                                 $matchingCallback = $cbType['cb'][$matchingCount];
2642
2643                                 # let's set a title or last part (if '|' was found)
2644                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2645                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2646                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2647                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2648                                 } else {
2649                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2650                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2651                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2652                                 }
2653
2654                                 $pieceStart = $openingBraceStack[$lastOpeningBrace]['startAt'] - $matchingCount;
2655                                 $pieceEnd = $i + $matchingCount;
2656
2657                                 if( is_callable( $matchingCallback ) ) {
2658                                         $cbArgs = array (
2659                                                                          'text' => substr($text, $pieceStart, $pieceEnd - $pieceStart),
2660                                                                          'title' => trim($openingBraceStack[$lastOpeningBrace]['title']),
2661                                                                          'parts' => $openingBraceStack[$lastOpeningBrace]['parts'],
2662                                                                          'lineStart' => (($pieceStart > 0) && ($text[$pieceStart-1] == "\n")),
2663                                                                          );
2664                                         # finally we can call a user callback and replace piece of text
2665                                         $replaceWith = call_user_func( $matchingCallback, $cbArgs );
2666                                         $text = substr($text, 0, $pieceStart) . $replaceWith . substr($text, $pieceEnd);
2667                                         $i = $pieceStart + strlen($replaceWith);
2668                                 } else {
2669                                         # null value for callback means that parentheses should be parsed, but not replaced
2670                                         $i += $matchingCount;
2671                                 }
2672
2673                                 # reset last opening parentheses, but keep it in case there are unused characters
2674                                 $piece = array('brace' => $openingBraceStack[$lastOpeningBrace]['brace'],
2675                                                            'braceEnd' => $openingBraceStack[$lastOpeningBrace]['braceEnd'],
2676                                                            'count' => $openingBraceStack[$lastOpeningBrace]['count'],
2677                                                            'title' => '',
2678                                                            'parts' => null,
2679                                                            'startAt' => $openingBraceStack[$lastOpeningBrace]['startAt']);
2680                                 $openingBraceStack[$lastOpeningBrace--] = null;
2681
2682                                 if ($matchingCount < $piece['count']) {
2683                                         $piece['count'] -= $matchingCount;
2684                                         $piece['startAt'] -= $matchingCount;
2685                                         $piece['partStart'] = $piece['startAt'];
2686                                         # do we still qualify for any callback with remaining count?
2687                                         $currentCbList = $callbacks[$piece['brace']]['cb'];
2688                                         while ( $piece['count'] ) {
2689                                                 if ( array_key_exists( $piece['count'], $currentCbList ) ) {
2690                                                         $lastOpeningBrace++;
2691                                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2692                                                         break;
2693                                                 }
2694                                                 --$piece['count'];
2695                                         }
2696                                 }
2697                         } elseif ( $found == 'pipe' ) {
2698                                 # lets set a title if it is a first separator, or next part otherwise
2699                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2700                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2701                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2702                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2703                                         $openingBraceStack[$lastOpeningBrace]['parts'] = array();
2704                                 } else {
2705                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2706                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2707                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2708                                 }
2709                                 $openingBraceStack[$lastOpeningBrace]['partStart'] = ++$i;
2710                         }
2711                 }
2712
2713                 wfProfileOut( __METHOD__ );
2714                 return $text;
2715         }
2716
2717         /**
2718          * Replace magic variables, templates, and template arguments
2719          * with the appropriate text. Templates are substituted recursively,
2720          * taking care to avoid infinite loops.
2721          *
2722          * Note that the substitution depends on value of $mOutputType:
2723          *  OT_WIKI: only {{subst:}} templates
2724          *  OT_MSG: only magic variables
2725          *  OT_HTML: all templates and magic variables
2726          *
2727          * @param string $tex The text to transform
2728          * @param array $args Key-value pairs representing template parameters to substitute
2729          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
2730          * @private
2731          */
2732         function replaceVariables( $text, $args = array(), $argsOnly = false ) {
2733                 # Prevent too big inclusions
2734                 if( strlen( $text ) > $this->mOptions->getMaxIncludeSize() ) {
2735                         return $text;
2736                 }
2737
2738                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2739                 wfProfileIn( $fname );
2740
2741                 # This function is called recursively. To keep track of arguments we need a stack:
2742                 array_push( $this->mArgStack, $args );
2743
2744                 $braceCallbacks = array();
2745                 if ( !$argsOnly ) {
2746                         $braceCallbacks[2] = array( &$this, 'braceSubstitution' );
2747                 }
2748                 if ( $this->mOutputType != OT_MSG ) {
2749                         $braceCallbacks[3] = array( &$this, 'argSubstitution' );
2750                 }
2751                 if ( $braceCallbacks ) {
2752                         $callbacks = array(
2753                                 '{' => array(
2754                                         'end' => '}',
2755                                         'cb' => $braceCallbacks,
2756                                         'min' => $argsOnly ? 3 : 2,
2757                                         'max' => isset( $braceCallbacks[3] ) ? 3 : 2,
2758                                 ),
2759                                 '[' => array(
2760                                         'end' => ']',
2761                                         'cb' => array(2=>null),
2762                                         'min' => 2,
2763                                         'max' => 2,
2764                                 )
2765                         );
2766                         $text = $this->replace_callback ($text, $callbacks);
2767
2768                         array_pop( $this->mArgStack );
2769                 }
2770                 wfProfileOut( $fname );
2771                 return $text;
2772         }
2773
2774         /**
2775          * Replace magic variables
2776          * @private
2777          */
2778         function variableSubstitution( $matches ) {
2779                 global $wgContLang;
2780                 $fname = 'Parser::variableSubstitution';
2781                 $varname = $wgContLang->lc($matches[1]);
2782                 wfProfileIn( $fname );
2783                 $skip = false;
2784                 if ( $this->mOutputType == OT_WIKI ) {
2785                         # Do only magic variables prefixed by SUBST
2786                         $mwSubst =& MagicWord::get( 'subst' );
2787                         if (!$mwSubst->matchStartAndRemove( $varname ))
2788                                 $skip = true;
2789                         # Note that if we don't substitute the variable below,
2790                         # we don't remove the {{subst:}} magic word, in case
2791                         # it is a template rather than a magic variable.
2792                 }
2793                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
2794                         $id = $this->mVariables[$varname];
2795                         # Now check if we did really match, case sensitive or not
2796                         $mw =& MagicWord::get( $id );
2797                         if ($mw->match($matches[1])) {
2798                                 $text = $this->getVariableValue( $id );
2799                                 $this->mOutput->mContainsOldMagic = true;
2800                         } else {
2801                                 $text = $matches[0];
2802                         }
2803                 } else {
2804                         $text = $matches[0];
2805                 }
2806                 wfProfileOut( $fname );
2807                 return $text;
2808         }
2809
2810         /**
2811          * Return the text of a template, after recursively
2812          * replacing any variables or templates within the template.
2813          *
2814          * @param array $piece The parts of the template
2815          *  $piece['text']: matched text
2816          *  $piece['title']: the title, i.e. the part before the |
2817          *  $piece['parts']: the parameter array
2818          * @return string the text of the template
2819          * @private
2820          */
2821         function braceSubstitution( $piece ) {
2822                 global $wgContLang, $wgLang, $wgAllowDisplayTitle;
2823                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2824                 wfProfileIn( $fname );
2825                 wfProfileIn( __METHOD__.'-setup' );
2826
2827                 # Flags
2828                 $found = false;             # $text has been filled
2829                 $nowiki = false;            # wiki markup in $text should be escaped
2830                 $noparse = false;           # Unsafe HTML tags should not be stripped, etc.
2831                 $noargs = false;            # Don't replace triple-brace arguments in $text
2832                 $replaceHeadings = false;   # Make the edit section links go to the template not the article
2833                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
2834                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
2835
2836                 # Title object, where $text came from
2837                 $title = NULL;
2838
2839                 $linestart = '';
2840
2841
2842                 # $part1 is the bit before the first |, and must contain only title characters
2843                 # $args is a list of arguments, starting from index 0, not including $part1
2844
2845                 $titleText = $part1 = $piece['title'];
2846                 # If the third subpattern matched anything, it will start with |
2847
2848                 if (null == $piece['parts']) {
2849                         $replaceWith = $this->variableSubstitution (array ($piece['text'], $piece['title']));
2850                         if ($replaceWith != $piece['text']) {
2851                                 $text = $replaceWith;
2852                                 $found = true;
2853                                 $noparse = true;
2854                                 $noargs = true;
2855                         }
2856                 }
2857
2858                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
2859                 wfProfileOut( __METHOD__.'-setup' );
2860
2861                 # SUBST
2862                 wfProfileIn( __METHOD__.'-modifiers' );
2863                 if ( !$found ) {
2864                         $mwSubst =& MagicWord::get( 'subst' );
2865                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor $this->ot['wiki'] ) {
2866                                 # One of two possibilities is true:
2867                                 # 1) Found SUBST but not in the PST phase
2868                                 # 2) Didn't find SUBST and in the PST phase
2869                                 # In either case, return without further processing
2870                                 $text = $piece['text'];
2871                                 $found = true;
2872                                 $noparse = true;
2873                                 $noargs = true;
2874                         }
2875                 }
2876
2877                 # MSG, MSGNW and RAW
2878                 if ( !$found ) {
2879                         # Check for MSGNW:
2880                         $mwMsgnw =& MagicWord::get( 'msgnw' );
2881                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2882                                 $nowiki = true;
2883                         } else {
2884                                 # Remove obsolete MSG:
2885                                 $mwMsg =& MagicWord::get( 'msg' );
2886                                 $mwMsg->matchStartAndRemove( $part1 );
2887                         }
2888
2889                         # Check for RAW:
2890                         $mwRaw =& MagicWord::get( 'raw' );
2891                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
2892                                 $forceRawInterwiki = true;
2893                         }
2894                 }
2895                 wfProfileOut( __METHOD__.'-modifiers' );
2896
2897                 # Parser functions
2898                 if ( !$found ) {
2899                         wfProfileIn( __METHOD__ . '-pfunc' );
2900
2901                         $colonPos = strpos( $part1, ':' );
2902                         if ( $colonPos !== false ) {
2903                                 # Case sensitive functions
2904                                 $function = substr( $part1, 0, $colonPos );
2905                                 if ( isset( $this->mFunctionSynonyms[1][$function] ) ) {
2906                                         $function = $this->mFunctionSynonyms[1][$function];
2907                                 } else {
2908                                         # Case insensitive functions
2909                                         $function = strtolower( $function );
2910                                         if ( isset( $this->mFunctionSynonyms[0][$function] ) ) {
2911                                                 $function = $this->mFunctionSynonyms[0][$function];
2912                                         } else {
2913                                                 $function = false;
2914                                         }
2915                                 }
2916                                 if ( $function ) {
2917                                         $funcArgs = array_map( 'trim', $args );
2918                                         $funcArgs = array_merge( array( &$this, trim( substr( $part1, $colonPos + 1 ) ) ), $funcArgs );
2919                                         $result = call_user_func_array( $this->mFunctionHooks[$function], $funcArgs );
2920                                         $found = true;
2921
2922                                         // The text is usually already parsed, doesn't need triple-brace tags expanded, etc.
2923                                         //$noargs = true;
2924                                         //$noparse = true;
2925
2926                                         if ( is_array( $result ) ) {
2927                                                 if ( isset( $result[0] ) ) {
2928                                                         $text = $linestart . $result[0];
2929                                                         unset( $result[0] );
2930                                                 }
2931
2932                                                 // Extract flags into the local scope
2933                                                 // This allows callers to set flags such as nowiki, noparse, found, etc.
2934                                                 extract( $result );
2935                                         } else {
2936                                                 $text = $linestart . $result;
2937                                         }
2938                                 }
2939                         }
2940                         wfProfileOut( __METHOD__ . '-pfunc' );
2941                 }
2942
2943                 # Template table test
2944
2945                 # Did we encounter this template already? If yes, it is in the cache
2946                 # and we need to check for loops.
2947                 if ( !$found && isset( $this->mTemplates[$piece['title']] ) ) {
2948                         $found = true;
2949
2950                         # Infinite loop test
2951                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2952                                 $noparse = true;
2953                                 $noargs = true;
2954                                 $found = true;
2955                                 $text = $linestart .
2956                                         "[[$part1]]<!-- WARNING: template loop detected -->";
2957                                 wfDebug( __METHOD__.": template loop broken at '$part1'\n" );
2958                         } else {
2959                                 # set $text to cached message.
2960                                 $text = $linestart . $this->mTemplates[$piece['title']];
2961                         }
2962                 }
2963
2964                 # Load from database
2965                 $lastPathLevel = $this->mTemplatePath;
2966                 if ( !$found ) {
2967                         wfProfileIn( __METHOD__ . '-loadtpl' );
2968                         $ns = NS_TEMPLATE;
2969                         # declaring $subpage directly in the function call
2970                         # does not work correctly with references and breaks
2971                         # {{/subpage}}-style inclusions
2972                         $subpage = '';
2973                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
2974                         if ($subpage !== '') {
2975                                 $ns = $this->mTitle->getNamespace();
2976                         }
2977                         $title = Title::newFromText( $part1, $ns );
2978
2979
2980                         if ( !is_null( $title ) ) {
2981                                 $titleText = $title->getPrefixedText();
2982                                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
2983                                 # Check for language variants if the template is not found
2984                                 if($checkVariantLink && $title->getArticleID() == 0){
2985                                         $wgContLang->findVariantLink($part1, $title);
2986                                 }
2987
2988                                 if ( !$title->isExternal() ) {
2989                                         if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->ot['html'] ) {
2990                                                 $text = SpecialPage::capturePath( $title );
2991                                                 if ( is_string( $text ) ) {
2992                                                         $found = true;
2993                                                         $noparse = true;
2994                                                         $noargs = true;
2995                                                         $isHTML = true;
2996                                                         $this->disableCache();
2997                                                 }
2998                                         } else {
2999                                                 $articleContent = $this->fetchTemplate( $title );
3000                                                 if ( $articleContent !== false ) {
3001                                                         $found = true;
3002                                                         $text = $articleContent;
3003                                                         $replaceHeadings = true;
3004                                                 }
3005                                         }
3006
3007                                         # If the title is valid but undisplayable, make a link to it
3008                                         if ( !$found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3009                                                 $text = "[[:$titleText]]";
3010                                                 $found = true;
3011                                         }
3012                                 } elseif ( $title->isTrans() ) {
3013                                         // Interwiki transclusion
3014                                         if ( $this->ot['html'] && !$forceRawInterwiki ) {
3015                                                 $text = $this->interwikiTransclude( $title, 'render' );
3016                                                 $isHTML = true;
3017                                                 $noparse = true;
3018                                         } else {
3019                                                 $text = $this->interwikiTransclude( $title, 'raw' );
3020                                                 $replaceHeadings = true;
3021                                         }
3022                                         $found = true;
3023                                 }
3024
3025                                 # Template cache array insertion
3026                                 # Use the original $piece['title'] not the mangled $part1, so that
3027                                 # modifiers such as RAW: produce separate cache entries
3028                                 if( $found ) {
3029                                         if( $isHTML ) {
3030                                                 // A special page; don't store it in the template cache.
3031                                         } else {
3032                                                 $this->mTemplates[$piece['title']] = $text;
3033                                         }
3034                                         $text = $linestart . $text;
3035                                 }
3036                         }
3037                         wfProfileOut( __METHOD__ . '-loadtpl' );
3038                 }
3039
3040                 if ( $found && !$this->incrementIncludeSize( 'pre-expand', strlen( $text ) ) ) {
3041                         # Error, oversize inclusion
3042                         $text = $linestart .
3043                                 "[[$titleText]]<!-- WARNING: template omitted, pre-expand include size too large -->";
3044                         $noparse = true;
3045                         $noargs = true;
3046                 }
3047
3048                 # Recursive parsing, escaping and link table handling
3049                 # Only for HTML output
3050                 if ( $nowiki && $found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3051                         $text = wfEscapeWikiText( $text );
3052                 } elseif ( !$this->ot['msg'] && $found ) {
3053                         if ( $noargs ) {
3054                                 $assocArgs = array();
3055                         } else {
3056                                 # Clean up argument array
3057                                 $assocArgs = array();
3058                                 $index = 1;
3059                                 foreach( $args as $arg ) {
3060                                         $eqpos = strpos( $arg, '=' );
3061                                         if ( $eqpos === false ) {
3062                                                 $assocArgs[$index++] = $arg;
3063                                         } else {
3064                                                 $name = trim( substr( $arg, 0, $eqpos ) );
3065                                                 $value = trim( substr( $arg, $eqpos+1 ) );
3066                                                 if ( $value === false ) {
3067                                                         $value = '';
3068                                                 }
3069                                                 if ( $name !== false ) {
3070                                                         $assocArgs[$name] = $value;
3071                                                 }
3072                                         }
3073                                 }
3074
3075                                 # Add a new element to the templace recursion path
3076                                 $this->mTemplatePath[$part1] = 1;
3077                         }
3078
3079                         if ( !$noparse ) {
3080                                 # If there are any <onlyinclude> tags, only include them
3081                                 if ( in_string( '<onlyinclude>', $text ) && in_string( '</onlyinclude>', $text ) ) {
3082                                         $m = array();
3083                                         preg_match_all( '/<onlyinclude>(.*?)\n?<\/onlyinclude>/s', $text, $m );
3084                                         $text = '';
3085                                         foreach ($m[1] as $piece)
3086                                                 $text .= $piece;
3087                                 }
3088                                 # Remove <noinclude> sections and <includeonly> tags
3089                                 $text = preg_replace( '/<noinclude>.*?<\/noinclude>/s', '', $text );
3090                                 $text = strtr( $text, array( '<includeonly>' => '' , '</includeonly>' => '' ) );
3091
3092                                 if( $this->ot['html'] || $this->ot['pre'] ) {
3093                                         # Strip <nowiki>, <pre>, etc.
3094                                         $text = $this->strip( $text, $this->mStripState );
3095                                         if ( $this->ot['html'] ) {
3096                                                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'replaceVariables' ), $assocArgs );
3097                                         } elseif ( $this->ot['pre'] && $this->mOptions->getRemoveComments() ) {
3098                                                 $text = Sanitizer::removeHTMLcomments( $text );
3099                                         }
3100                                 }
3101                                 $text = $this->replaceVariables( $text, $assocArgs );
3102
3103                                 # If the template begins with a table or block-level
3104                                 # element, it should be treated as beginning a new line.
3105                                 if (!$piece['lineStart'] && preg_match('/^({\\||:|;|#|\*)/', $text)) /*}*/{
3106                                         $text = "\n" . $text;
3107                                 }
3108                         } elseif ( !$noargs ) {
3109                                 # $noparse and !$noargs
3110                                 # Just replace the arguments, not any double-brace items
3111                                 # This is used for rendered interwiki transclusion
3112                                 $text = $this->replaceVariables( $text, $assocArgs, true );
3113                         }
3114                 }
3115                 # Prune lower levels off the recursion check path
3116                 $this->mTemplatePath = $lastPathLevel;
3117
3118                 if ( $found && !$this->incrementIncludeSize( 'post-expand', strlen( $text ) ) ) {
3119                         # Error, oversize inclusion
3120                         $text = $linestart .
3121                                 "[[$titleText]]<!-- WARNING: template omitted, post-expand include size too large -->";
3122                         $noparse = true;
3123                         $noargs = true;
3124                 }
3125
3126                 if ( !$found ) {
3127                         wfProfileOut( $fname );
3128                         return $piece['text'];
3129                 } else {
3130                         wfProfileIn( __METHOD__ . '-placeholders' );
3131                         if ( $isHTML ) {
3132                                 # Replace raw HTML by a placeholder
3133                                 # Add a blank line preceding, to prevent it from mucking up
3134                                 # immediately preceding headings
3135                                 $text = "\n\n" . $this->insertStripItem( $text, $this->mStripState );
3136                         } else {
3137                                 # replace ==section headers==
3138                                 # XXX this needs to go away once we have a better parser.
3139                                 if ( !$this->ot['wiki'] && !$this->ot['pre'] && $replaceHeadings ) {
3140                                         if( !is_null( $title ) )
3141                                                 $encodedname = base64_encode($title->getPrefixedDBkey());
3142                                         else
3143                                                 $encodedname = base64_encode("");
3144                                         $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
3145                                                 PREG_SPLIT_DELIM_CAPTURE);
3146                                         $text = '';
3147                                         $nsec = 0;
3148                                         for( $i = 0; $i < count($m); $i += 2 ) {
3149                                                 $text .= $m[$i];
3150                                                 if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
3151                                                 $hl = $m[$i + 1];
3152                                                 if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
3153                                                         $text .= $hl;
3154                                                         continue;
3155                                                 }
3156                                                 $m2 = array();
3157                                                 preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
3158                                                 $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
3159                                                         . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
3160
3161                                                 $nsec++;
3162                                         }
3163                                 }
3164                         }
3165                         wfProfileOut( __METHOD__ . '-placeholders' );
3166                 }
3167
3168                 # Prune lower levels off the recursion check path
3169                 $this->mTemplatePath = $lastPathLevel;
3170
3171                 if ( !$found ) {
3172                         wfProfileOut( $fname );
3173                         return $piece['text'];
3174                 } else {
3175                         wfProfileOut( $fname );
3176                         return $text;
3177                 }
3178         }
3179
3180         /**
3181          * Fetch the unparsed text of a template and register a reference to it.
3182          */
3183         function fetchTemplate( $title ) {
3184                 $text = false;
3185                 // Loop to fetch the article, with up to 1 redirect
3186                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
3187                         $rev = Revision::newFromTitle( $title );
3188                         $this->mOutput->addTemplate( $title, $title->getArticleID() );
3189                         if ( !$rev ) {
3190                                 break;
3191                         }
3192                         $text = $rev->getText();
3193                         if ( $text === false ) {
3194                                 break;
3195                         }
3196                         // Redirect?
3197                         $title = Title::newFromRedirect( $text );
3198                 }
3199                 return $text;
3200         }
3201
3202         /**
3203          * Transclude an interwiki link.
3204          */
3205         function interwikiTransclude( $title, $action ) {
3206                 global $wgEnableScaryTranscluding, $wgCanonicalNamespaceNames;
3207
3208                 if (!$wgEnableScaryTranscluding)
3209                         return wfMsg('scarytranscludedisabled');
3210
3211                 // The namespace will actually only be 0 or 10, depending on whether there was a leading :
3212                 // But we'll handle it generally anyway
3213                 if ( $title->getNamespace() ) {
3214                         // Use the canonical namespace, which should work anywhere
3215                         $articleName = $wgCanonicalNamespaceNames[$title->getNamespace()] . ':' . $title->getDBkey();
3216                 } else {
3217                         $articleName = $title->getDBkey();
3218                 }
3219
3220                 $url = str_replace('$1', urlencode($articleName), Title::getInterwikiLink($title->getInterwiki()));
3221                 $url .= "?action=$action";
3222                 if (strlen($url) > 255)
3223                         return wfMsg('scarytranscludetoolong');
3224                 return $this->fetchScaryTemplateMaybeFromCache($url);
3225         }
3226
3227         function fetchScaryTemplateMaybeFromCache($url) {
3228                 global $wgTranscludeCacheExpiry;
3229                 $dbr =& wfGetDB(DB_SLAVE);
3230                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3231                                 array('tc_url' => $url));
3232                 if ($obj) {
3233                         $time = $obj->tc_time;
3234                         $text = $obj->tc_contents;
3235                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3236                                 return $text;
3237                         }
3238                 }
3239
3240                 $text = Http::get($url);
3241                 if (!$text)
3242                         return wfMsg('scarytranscludefailed', $url);
3243
3244                 $dbw =& wfGetDB(DB_MASTER);
3245                 $dbw->replace('transcache', array('tc_url'), array(
3246                         'tc_url' => $url,
3247                         'tc_time' => time(),
3248                         'tc_contents' => $text));
3249                 return $text;
3250         }
3251
3252
3253         /**
3254          * Triple brace replacement -- used for template arguments
3255          * @private
3256          */
3257         function argSubstitution( $matches ) {
3258                 $arg = trim( $matches['title'] );
3259                 $text = $matches['text'];
3260                 $inputArgs = end( $this->mArgStack );
3261
3262                 if ( array_key_exists( $arg, $inputArgs ) ) {
3263                         $text = $inputArgs[$arg];
3264                 } else if (($this->mOutputType == OT_HTML || $this->mOutputType == OT_PREPROCESS ) &&
3265                 null != $matches['parts'] && count($matches['parts']) > 0) {
3266                         $text = $matches['parts'][0];
3267                 }
3268                 if ( !$this->incrementIncludeSize( 'arg', strlen( $text ) ) ) {
3269                         $text = $matches['text'] .
3270                                 '<!-- WARNING: argument omitted, expansion size too large -->';
3271                 }
3272
3273                 return $text;
3274         }
3275
3276         /**
3277          * Increment an include size counter
3278          *
3279          * @param string $type The type of expansion
3280          * @param integer $size The size of the text
3281          * @return boolean False if this inclusion would take it over the maximum, true otherwise
3282          */
3283         function incrementIncludeSize( $type, $size ) {
3284                 if ( $this->mIncludeSizes[$type] + $size > $this->mOptions->getMaxIncludeSize() ) {
3285                         return false;
3286                 } else {
3287                         $this->mIncludeSizes[$type] += $size;
3288                         return true;
3289                 }
3290         }
3291
3292         /**
3293          * Detect __NOGALLERY__ magic word and set a placeholder
3294          */
3295         function stripNoGallery( &$text ) {
3296                 # if the string __NOGALLERY__ (not case-sensitive) occurs in the HTML,
3297                 # do not add TOC
3298                 $mw = MagicWord::get( 'nogallery' );
3299                 $this->mOutput->mNoGallery = $mw->matchAndRemove( $text ) ;
3300         }
3301
3302         /**
3303          * Detect __TOC__ magic word and set a placeholder
3304          */
3305         function stripToc( $text ) {
3306                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
3307                 # do not add TOC
3308                 $mw = MagicWord::get( 'notoc' );
3309                 if( $mw->matchAndRemove( $text ) ) {
3310                         $this->mShowToc = false;
3311                 }
3312
3313                 $mw = MagicWord::get( 'toc' );
3314                 if( $mw->match( $text ) ) {
3315                         $this->mShowToc = true;
3316                         $this->mForceTocPosition = true;
3317
3318                         // Set a placeholder. At the end we'll fill it in with the TOC.
3319                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3320
3321                         // Only keep the first one.
3322                         $text = $mw->replace( '', $text );
3323                 }
3324                 return $text;
3325         }
3326
3327         /**
3328          * This function accomplishes several tasks:
3329          * 1) Auto-number headings if that option is enabled
3330          * 2) Add an [edit] link to sections for logged in users who have enabled the option
3331          * 3) Add a Table of contents on the top for users who have enabled the option
3332          * 4) Auto-anchor headings
3333          *
3334          * It loops through all headlines, collects the necessary data, then splits up the
3335          * string and re-inserts the newly formatted headlines.
3336          *
3337          * @param string $text
3338          * @param boolean $isMain
3339          * @private
3340          */
3341         function formatHeadings( $text, $isMain=true ) {
3342                 global $wgMaxTocLevel, $wgContLang;
3343
3344                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3345                 if( !$this->mTitle->userCanEdit() ) {
3346                         $showEditLink = 0;
3347                 } else {
3348                         $showEditLink = $this->mOptions->getEditSection();
3349                 }
3350
3351                 # Inhibit editsection links if requested in the page
3352                 $esw =& MagicWord::get( 'noeditsection' );
3353                 if( $esw->matchAndRemove( $text ) ) {
3354                         $showEditLink = 0;
3355                 }
3356
3357                 # Get all headlines for numbering them and adding funky stuff like [edit]
3358                 # links - this is for later, but we need the number of headlines right now
3359                 $matches = array();
3360                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
3361
3362                 # if there are fewer than 4 headlines in the article, do not show TOC
3363                 # unless it's been explicitly enabled.
3364                 $enoughToc = $this->mShowToc &&
3365                         (($numMatches >= 4) || $this->mForceTocPosition);
3366
3367                 # Allow user to stipulate that a page should have a "new section"
3368                 # link added via __NEWSECTIONLINK__
3369                 $mw =& MagicWord::get( 'newsectionlink' );
3370                 if( $mw->matchAndRemove( $text ) )
3371                         $this->mOutput->setNewSection( true );
3372
3373                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
3374                 # override above conditions and always show TOC above first header
3375                 $mw =& MagicWord::get( 'forcetoc' );
3376                 if ($mw->matchAndRemove( $text ) ) {
3377                         $this->mShowToc = true;
3378                         $enoughToc = true;
3379                 }
3380
3381                 # Never ever show TOC if no headers
3382                 if( $numMatches < 1 ) {
3383                         $enoughToc = false;
3384                 }
3385
3386                 # We need this to perform operations on the HTML
3387                 $sk =& $this->mOptions->getSkin();
3388
3389                 # headline counter
3390                 $headlineCount = 0;
3391                 $sectionCount = 0; # headlineCount excluding template sections
3392
3393                 # Ugh .. the TOC should have neat indentation levels which can be
3394                 # passed to the skin functions. These are determined here
3395                 $toc = '';
3396                 $full = '';
3397                 $head = array();
3398                 $sublevelCount = array();
3399                 $levelCount = array();
3400                 $toclevel = 0;
3401                 $level = 0;
3402                 $prevlevel = 0;
3403                 $toclevel = 0;
3404                 $prevtoclevel = 0;
3405
3406                 foreach( $matches[3] as $headline ) {
3407                         $istemplate = 0;
3408                         $templatetitle = '';
3409                         $templatesection = 0;
3410                         $numbering = '';
3411                         $mat = array();
3412                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
3413                                 $istemplate = 1;
3414                                 $templatetitle = base64_decode($mat[1]);
3415                                 $templatesection = 1 + (int)base64_decode($mat[2]);
3416                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
3417                         }
3418
3419                         if( $toclevel ) {
3420                                 $prevlevel = $level;
3421                                 $prevtoclevel = $toclevel;
3422                         }
3423                         $level = $matches[1][$headlineCount];
3424
3425                         if( $doNumberHeadings || $enoughToc ) {
3426
3427                                 if ( $level > $prevlevel ) {
3428                                         # Increase TOC level
3429                                         $toclevel++;
3430                                         $sublevelCount[$toclevel] = 0;
3431                                         if( $toclevel<$wgMaxTocLevel ) {
3432                                                 $toc .= $sk->tocIndent();
3433                                         }
3434                                 }
3435                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3436                                         # Decrease TOC level, find level to jump to
3437
3438                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3439                                                 # Can only go down to level 1
3440                                                 $toclevel = 1;
3441                                         } else {
3442                                                 for ($i = $toclevel; $i > 0; $i--) {
3443                                                         if ( $levelCount[$i] == $level ) {
3444                                                                 # Found last matching level
3445                                                                 $toclevel = $i;
3446                                                                 break;
3447                                                         }
3448                                                         elseif ( $levelCount[$i] < $level ) {
3449                                                                 # Found first matching level below current level
3450                                                                 $toclevel = $i + 1;
3451                                                                 break;
3452                                                         }
3453                                                 }
3454                                         }
3455                                         if( $toclevel<$wgMaxTocLevel ) {
3456                                                 $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
3457                                         }
3458                                 }
3459                                 else {
3460                                         # No change in level, end TOC line
3461                                         if( $toclevel<$wgMaxTocLevel ) {
3462                                                 $toc .= $sk->tocLineEnd();
3463                                         }
3464                                 }
3465
3466                                 $levelCount[$toclevel] = $level;
3467
3468                                 # count number of headlines for each level
3469                                 @$sublevelCount[$toclevel]++;
3470                                 $dot = 0;
3471                                 for( $i = 1; $i <= $toclevel; $i++ ) {
3472                                         if( !empty( $sublevelCount[$i] ) ) {
3473                                                 if( $dot ) {
3474                                                         $numbering .= '.';
3475                                                 }
3476                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
3477                                                 $dot = 1;
3478                                         }
3479                                 }
3480                         }
3481
3482                         # The canonized header is a version of the header text safe to use for links
3483                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
3484                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
3485                         $canonized_headline = $this->unstripNoWiki( $canonized_headline, $this->mStripState );
3486
3487                         # Remove link placeholders by the link text.
3488                         #     <!--LINK number-->
3489                         # turns into
3490                         #     link text with suffix
3491                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
3492                                                             "\$this->mLinkHolders['texts'][\$1]",
3493                                                             $canonized_headline );
3494                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
3495                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
3496                                                             $canonized_headline );
3497
3498                         # strip out HTML
3499                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
3500                         $tocline = trim( $canonized_headline );
3501                         # Save headline for section edit hint before it's escaped
3502                         $headline_hint = trim( $canonized_headline );
3503                         $canonized_headline = Sanitizer::escapeId( $tocline );
3504                         $refers[$headlineCount] = $canonized_headline;
3505
3506                         # count how many in assoc. array so we can track dupes in anchors
3507                         @$refers[$canonized_headline]++;
3508                         $refcount[$headlineCount]=$refers[$canonized_headline];
3509
3510                         # Don't number the heading if it is the only one (looks silly)
3511                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3512                                 # the two are different if the line contains a link
3513                                 $headline=$numbering . ' ' . $headline;
3514                         }
3515
3516                         # Create the anchor for linking from the TOC to the section
3517                         $anchor = $canonized_headline;
3518                         if($refcount[$headlineCount] > 1 ) {
3519                                 $anchor .= '_' . $refcount[$headlineCount];
3520                         }
3521                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3522                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3523                         }
3524                         # give headline the correct <h#> tag
3525                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount];
3526
3527                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
3528                                 if ( empty( $head[$headlineCount] ) ) {
3529                                         $head[$headlineCount] = '';
3530                                 }
3531                                 if( $istemplate )
3532                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
3533                                 else
3534                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1, $headline_hint);
3535                         }
3536                         // Yes, the headline logically goes before the edit section.  Why isn't it there
3537                         // in source?  Ask the CSS people.  The float gets screwed up if you do that.
3538                         // This might be moved to before the editsection at some point so that it will
3539                         // display a bit more prettily without CSS, so please don't rely on the order.
3540                         $head[$headlineCount] .= ' <span class="mw-headline">'.$headline.'</span></h'.$level.'>';
3541
3542                         $headlineCount++;
3543                         if( !$istemplate )
3544                                 $sectionCount++;
3545                 }
3546
3547                 if( $enoughToc ) {
3548                         if( $toclevel<$wgMaxTocLevel ) {
3549                                 $toc .= $sk->tocUnindent( $toclevel - 1 );
3550                         }
3551                         $toc = $sk->tocList( $toc );
3552                 }
3553
3554                 # split up and insert constructed headlines
3555
3556                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
3557                 $i = 0;
3558
3559                 foreach( $blocks as $block ) {
3560                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
3561                                 # This is the [edit] link that appears for the top block of text when
3562                                 # section editing is enabled
3563
3564                                 # Disabled because it broke block formatting
3565                                 # For example, a bullet point in the top line
3566                                 # $full .= $sk->editSectionLink(0);
3567                         }
3568                         $full .= $block;
3569                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
3570                                 # Top anchor now in skin
3571                                 $full = $full.$toc;
3572                         }
3573
3574                         if( !empty( $head[$i] ) ) {
3575                                 $full .= $head[$i];
3576                         }
3577                         $i++;
3578                 }
3579                 if( $this->mForceTocPosition ) {
3580                         return str_replace( '<!--MWTOC-->', $toc, $full );
3581                 } else {
3582                         return $full;
3583                 }
3584         }
3585
3586         /**
3587          * Transform wiki markup when saving a page by doing \r\n -> \n
3588          * conversion, substitting signatures, {{subst:}} templates, etc.
3589          *
3590          * @param string $text the text to transform
3591          * @param Title &$title the Title object for the current article
3592          * @param User &$user the User object describing the current user
3593          * @param ParserOptions $options parsing options
3594          * @param bool $clearState whether to clear the parser state first
3595          * @return string the altered wiki markup
3596          * @public
3597          */
3598         function preSaveTransform( $text, &$title, $user, $options, $clearState = true ) {
3599                 $this->mOptions = $options;
3600                 $this->mTitle =& $title;
3601                 $this->setOutputType( OT_WIKI );
3602
3603                 if ( $clearState ) {
3604                         $this->clearState();
3605                 }
3606
3607                 $stripState = false;
3608                 $pairs = array(
3609                         "\r\n" => "\n",
3610                 );
3611                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
3612                 $text = $this->strip( $text, $stripState, true, array( 'gallery' ) );
3613                 $text = $this->pstPass2( $text, $stripState, $user );
3614                 $text = $this->unstrip( $text, $stripState );
3615                 $text = $this->unstripNoWiki( $text, $stripState );
3616                 return $text;
3617         }
3618
3619         /**
3620          * Pre-save transform helper function
3621          * @private
3622          */
3623         function pstPass2( $text, &$stripState, $user ) {
3624                 global $wgContLang, $wgLocaltimezone;
3625
3626                 /* Note: This is the timestamp saved as hardcoded wikitext to
3627                  * the database, we use $wgContLang here in order to give
3628                  * everyone the same signature and use the default one rather
3629                  * than the one selected in each user's preferences.
3630                  */
3631                 if ( isset( $wgLocaltimezone ) ) {
3632                         $oldtz = getenv( 'TZ' );
3633                         putenv( 'TZ='.$wgLocaltimezone );
3634                 }
3635                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
3636                   ' (' . date( 'T' ) . ')';
3637                 if ( isset( $wgLocaltimezone ) ) {
3638                         putenv( 'TZ='.$oldtz );
3639                 }
3640
3641                 # Variable replacement
3642                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
3643                 $text = $this->replaceVariables( $text );
3644
3645                 # Strip out <nowiki> etc. added via replaceVariables
3646                 $text = $this->strip( $text, $stripState, false, array( 'gallery' ) );
3647
3648                 # Signatures
3649                 $sigText = $this->getUserSig( $user );
3650                 $text = strtr( $text, array(
3651                         '~~~~~' => $d,
3652                         '~~~~' => "$sigText $d",
3653                         '~~~' => $sigText
3654                 ) );
3655
3656                 # Context links: [[|name]] and [[name (context)|]]
3657                 #
3658                 global $wgLegalTitleChars;
3659                 $tc = "[$wgLegalTitleChars]";
3660                 $nc = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
3661
3662                 $p1 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\))\\|]]/";            # [[ns:page (context)|]]
3663                 $p3 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\)|)(, $tc+|)\\|]]/";  # [[ns:page (context), context|]]
3664                 $p2 = "/\[\[\\|($tc+)]]/";                                      # [[|page]]
3665
3666                 # try $p1 first, to turn "[[A, B (C)|]]" into "[[A, B (C)|A, B]]"
3667                 $text = preg_replace( $p1, '[[\\1\\2\\3|\\2]]', $text );
3668                 $text = preg_replace( $p3, '[[\\1\\2\\3\\4|\\2]]', $text );
3669
3670                 $t = $this->mTitle->getText();
3671                 $m = array();
3672                 if ( preg_match( "/^($nc+:|)$tc+?( \\($tc+\\))$/", $t, $m ) ) {
3673                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3674                 } elseif ( preg_match( "/^($nc+:|)$tc+?(, $tc+|)$/", $t, $m ) && '' != "$m[1]$m[2]" ) {
3675                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3676                 } else {
3677                         # if there's no context, don't bother duplicating the title
3678                         $text = preg_replace( $p2, '[[\\1]]', $text );
3679                 }
3680
3681                 # Trim trailing whitespace
3682                 # __END__ tag allows for trailing
3683                 # whitespace to be deliberately included
3684                 $text = rtrim( $text );
3685                 $mw =& MagicWord::get( 'end' );
3686                 $mw->matchAndRemove( $text );
3687
3688                 return $text;
3689         }
3690
3691         /**
3692          * Fetch the user's signature text, if any, and normalize to
3693          * validated, ready-to-insert wikitext.
3694          *
3695          * @param User $user
3696          * @return string
3697          * @private
3698          */
3699         function getUserSig( &$user ) {
3700                 $username = $user->getName();
3701                 $nickname = $user->getOption( 'nickname' );
3702                 $nickname = $nickname === '' ? $username : $nickname;
3703
3704                 if( $user->getBoolOption( 'fancysig' ) !== false ) {
3705                         # Sig. might contain markup; validate this
3706                         if( $this->validateSig( $nickname ) !== false ) {
3707                                 # Validated; clean up (if needed) and return it
3708                                 return $this->cleanSig( $nickname, true );
3709                         } else {
3710                                 # Failed to validate; fall back to the default
3711                                 $nickname = $username;
3712                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
3713                         }
3714                 }
3715
3716                 // Make sure nickname doesnt get a sig in a sig
3717                 $nickname = $this->cleanSigInSig( $nickname );
3718
3719                 # If we're still here, make it a link to the user page
3720                 $userpage = $user->getUserPage();
3721                 return( '[[' . $userpage->getPrefixedText() . '|' . wfEscapeWikiText( $nickname ) . ']]' );
3722         }
3723
3724         /**
3725          * Check that the user's signature contains no bad XML
3726          *
3727          * @param string $text
3728          * @return mixed An expanded string, or false if invalid.
3729          */
3730         function validateSig( $text ) {
3731                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
3732         }
3733
3734         /**
3735          * Clean up signature text
3736          *
3737          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures @see cleanSigInSig
3738          * 2) Substitute all transclusions
3739          *
3740          * @param string $text
3741          * @param $parsing Whether we're cleaning (preferences save) or parsing
3742          * @return string Signature text
3743          */
3744         function cleanSig( $text, $parsing = false ) {
3745                 global $wgTitle;
3746                 $this->startExternalParse( $wgTitle, new ParserOptions(), $parsing ? OT_WIKI : OT_MSG );
3747
3748                 $substWord = MagicWord::get( 'subst' );
3749                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
3750                 $substText = '{{' . $substWord->getSynonym( 0 );
3751
3752                 $text = preg_replace( $substRegex, $substText, $text );
3753                 $text = $this->cleanSigInSig( $text );
3754                 $text = $this->replaceVariables( $text );
3755
3756                 $this->clearState();
3757                 return $text;
3758         }
3759
3760         /**
3761          * Strip ~~~, ~~~~ and ~~~~~ out of signatures
3762          * @param string $text
3763          * @return string Signature text with /~{3,5}/ removed
3764          */
3765         function cleanSigInSig( $text ) {
3766                 $text = preg_replace( '/~{3,5}/', '', $text );
3767                 return $text;
3768         }
3769
3770         /**
3771          * Set up some variables which are usually set up in parse()
3772          * so that an external function can call some class members with confidence
3773          * @public
3774          */
3775         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
3776                 $this->mTitle =& $title;
3777                 $this->mOptions = $options;
3778                 $this->setOutputType( $outputType );
3779                 if ( $clearState ) {
3780                         $this->clearState();
3781                 }
3782         }
3783
3784         /**
3785          * Transform a MediaWiki message by replacing magic variables.
3786          *
3787          * @param string $text the text to transform
3788          * @param ParserOptions $options  options
3789          * @return string the text with variables substituted
3790          * @public
3791          */
3792         function transformMsg( $text, $options ) {
3793                 global $wgTitle;
3794                 static $executing = false;
3795
3796                 $fname = "Parser::transformMsg";
3797
3798                 # Guard against infinite recursion
3799                 if ( $executing ) {
3800                         return $text;
3801                 }
3802                 $executing = true;
3803
3804                 wfProfileIn($fname);
3805
3806                 if ( $wgTitle ) {
3807                         $this->mTitle = $wgTitle;
3808                 } else {
3809                         $this->mTitle = Title::newFromText('msg');
3810                 }
3811                 $this->mOptions = $options;
3812                 $this->setOutputType( OT_MSG );
3813                 $this->clearState();
3814                 $text = $this->replaceVariables( $text );
3815
3816                 $executing = false;
3817                 wfProfileOut($fname);
3818                 return $text;
3819         }
3820
3821         /**
3822          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
3823          * The callback should have the following form:
3824          *    function myParserHook( $text, $params, &$parser ) { ... }
3825          *
3826          * Transform and return $text. Use $parser for any required context, e.g. use
3827          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
3828          *
3829          * @public
3830          *
3831          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
3832          * @param mixed $callback The callback function (and object) to use for the tag
3833          *
3834          * @return The old value of the mTagHooks array associated with the hook
3835          */
3836         function setHook( $tag, $callback ) {
3837                 $tag = strtolower( $tag );
3838                 $oldVal = @$this->mTagHooks[$tag];
3839                 $this->mTagHooks[$tag] = $callback;
3840
3841                 return $oldVal;
3842         }
3843
3844         /**
3845          * Create a function, e.g. {{sum:1|2|3}}
3846          * The callback function should have the form:
3847          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
3848          *
3849          * The callback may either return the text result of the function, or an array with the text
3850          * in element 0, and a number of flags in the other elements. The names of the flags are
3851          * specified in the keys. Valid flags are:
3852          *   found                     The text returned is valid, stop processing the template. This
3853          *                             is on by default.
3854          *   nowiki                    Wiki markup in the return value should be escaped
3855          *   noparse                   Unsafe HTML tags should not be stripped, etc.
3856          *   noargs                    Don't replace triple-brace arguments in the return value
3857          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
3858          *
3859          * @public
3860          *
3861          * @param string $id The magic word ID
3862          * @param mixed $callback The callback function (and object) to use
3863          * @param integer $flags a combination of the following flags:
3864          *                SFH_NO_HASH No leading hash, i.e. {{plural:...}} instead of {{#if:...}}
3865          *
3866          * @return The old callback function for this name, if any
3867          */
3868         function setFunctionHook( $id, $callback, $flags = 0 ) {
3869                 $oldVal = @$this->mFunctionHooks[$id];
3870                 $this->mFunctionHooks[$id] = $callback;
3871
3872                 # Add to function cache
3873                 $mw = MagicWord::get( $id );
3874                 if( !$mw )
3875                         throw new MWException( 'Parser::setFunctionHook() expecting a magic word identifier.' );
3876
3877                 $synonyms = $mw->getSynonyms();
3878                 $sensitive = intval( $mw->isCaseSensitive() );
3879
3880                 foreach ( $synonyms as $syn ) {
3881                         # Case
3882                         if ( !$sensitive ) {
3883                                 $syn = strtolower( $syn );
3884                         }
3885                         # Add leading hash
3886                         if ( !( $flags & SFH_NO_HASH ) ) {
3887                                 $syn = '#' . $syn;
3888                         }
3889                         # Remove trailing colon
3890                         if ( substr( $syn, -1, 1 ) == ':' ) {
3891                                 $syn = substr( $syn, 0, -1 );
3892                         }
3893                         $this->mFunctionSynonyms[$sensitive][$syn] = $id;
3894                 }
3895                 return $oldVal;
3896         }
3897
3898         /**
3899          * Get all registered function hook identifiers
3900          *
3901          * @return array
3902          */
3903         function getFunctionHooks() {
3904                 return array_keys( $this->mFunctionHooks );
3905         }
3906
3907         /**
3908          * Replace <!--LINK--> link placeholders with actual links, in the buffer
3909          * Placeholders created in Skin::makeLinkObj()
3910          * Returns an array of links found, indexed by PDBK:
3911          *  0 - broken
3912          *  1 - normal link
3913          *  2 - stub
3914          * $options is a bit field, RLH_FOR_UPDATE to select for update
3915          */
3916         function replaceLinkHolders( &$text, $options = 0 ) {
3917                 global $wgUser;
3918                 global $wgOutputReplace;
3919                 global $wgContLang;
3920
3921                 $fname = 'Parser::replaceLinkHolders';
3922                 wfProfileIn( $fname );
3923
3924                 $pdbks = array();
3925                 $colours = array();
3926                 $sk =& $this->mOptions->getSkin();
3927                 $linkCache =& LinkCache::singleton();
3928
3929                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
3930                         wfProfileIn( $fname.'-check' );
3931                         $dbr =& wfGetDB( DB_SLAVE );
3932                         $page = $dbr->tableName( 'page' );
3933                         $threshold = $wgUser->getOption('stubthreshold');
3934
3935                         # Sort by namespace
3936                         asort( $this->mLinkHolders['namespaces'] );
3937
3938                         # Generate query
3939                         $query = false;
3940                         $current = null;
3941                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3942                                 # Make title object
3943                                 $title = $this->mLinkHolders['titles'][$key];
3944
3945                                 # Skip invalid entries.
3946                                 # Result will be ugly, but prevents crash.
3947                                 if ( is_null( $title ) ) {
3948                                         continue;
3949                                 }
3950                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
3951
3952                                 # Check if it's a static known link, e.g. interwiki
3953                                 if ( $title->isAlwaysKnown() ) {
3954                                         $colours[$pdbk] = 1;
3955                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
3956                                         $colours[$pdbk] = 1;
3957                                         $this->mOutput->addLink( $title, $id );
3958                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
3959                                         $colours[$pdbk] = 0;
3960                                 } else {
3961                                         # Not in the link cache, add it to the query
3962                                         if ( !isset( $current ) ) {
3963                                                 $current = $ns;
3964                                                 $query =  "SELECT page_id, page_namespace, page_title";
3965                                                 if ( $threshold > 0 ) {
3966                                                         $query .= ', page_len, page_is_redirect';
3967                                                 }
3968                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
3969                                         } elseif ( $current != $ns ) {
3970                                                 $current = $ns;
3971                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
3972                                         } else {
3973                                                 $query .= ', ';
3974                                         }
3975
3976                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
3977                                 }
3978                         }
3979                         if ( $query ) {
3980                                 $query .= '))';
3981                                 if ( $options & RLH_FOR_UPDATE ) {
3982                                         $query .= ' FOR UPDATE';
3983                                 }
3984
3985                                 $res = $dbr->query( $query, $fname );
3986
3987                                 # Fetch data and form into an associative array
3988                                 # non-existent = broken
3989                                 # 1 = known
3990                                 # 2 = stub
3991                                 while ( $s = $dbr->fetchObject($res) ) {
3992                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
3993                                         $pdbk = $title->getPrefixedDBkey();
3994                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
3995                                         $this->mOutput->addLink( $title, $s->page_id );
3996
3997                                         if ( $threshold >  0 ) {
3998                                                 $size = $s->page_len;
3999                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
4000                                                         $colours[$pdbk] = 1;
4001                                                 } else {
4002                                                         $colours[$pdbk] = 2;
4003                                                 }
4004                                         } else {
4005                                                 $colours[$pdbk] = 1;
4006                                         }
4007                                 }
4008                         }
4009                         wfProfileOut( $fname.'-check' );
4010
4011                         # Do a second query for different language variants of links (if needed)
4012                         if($wgContLang->hasVariants()){
4013                                 $linkBatch = new LinkBatch();
4014                                 $variantMap = array(); // maps $pdbkey_Variant => $pdbkey_original
4015
4016                                 // Add variants of links to link batch
4017                                 foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4018                                         $title = $this->mLinkHolders['titles'][$key];
4019                                         if ( is_null( $title ) )
4020                                                 continue;
4021
4022                                         $pdbk = $title->getPrefixedDBkey();
4023
4024                                         // generate all variants of the link title text
4025                                         $allTextVariants = $wgContLang->convertLinkToAllVariants($title->getText());
4026
4027                                         // if link was not found (in first query), add all variants to query
4028                                         if ( !isset($colours[$pdbk]) ){
4029                                                 foreach($allTextVariants as $textVariant){
4030                                                         $variantTitle = Title::makeTitle( $ns, $textVariant );
4031                                                         if(is_null($variantTitle)) continue;
4032                                                         $linkBatch->addObj( $variantTitle );
4033                                                         $variantMap[$variantTitle->getPrefixedDBkey()][] = $key;
4034                                                 }
4035                                         }
4036                                 }
4037
4038
4039                                 if(!$linkBatch->isEmpty()){
4040                                         // construct query
4041                                         $titleClause = $linkBatch->constructSet('page', $dbr);
4042
4043                                         $variantQuery =  "SELECT page_id, page_namespace, page_title";
4044                                         if ( $threshold > 0 ) {
4045                                                 $variantQuery .= ', page_len, page_is_redirect';
4046                                         }
4047
4048                                         $variantQuery .= " FROM $page WHERE $titleClause";
4049                                         if ( $options & RLH_FOR_UPDATE ) {
4050                                                 $variantQuery .= ' FOR UPDATE';
4051                                         }
4052
4053                                         $varRes = $dbr->query( $variantQuery, $fname );
4054
4055                                         // for each found variants, figure out link holders and replace
4056                                         while ( $s = $dbr->fetchObject($varRes) ) {
4057
4058                                                 $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title );
4059                                                 $varPdbk = $variantTitle->getPrefixedDBkey();
4060                                                 $linkCache->addGoodLinkObj( $s->page_id, $variantTitle );
4061                                                 $this->mOutput->addLink( $variantTitle, $s->page_id );
4062
4063                                                 $holderKeys = $variantMap[$varPdbk];
4064
4065                                                 // loop over link holders
4066                                                 foreach($holderKeys as $key){
4067                                                         $title = $this->mLinkHolders['titles'][$key];
4068                                                         if ( is_null( $title ) ) continue;
4069
4070                                                         $pdbk = $title->getPrefixedDBkey();
4071
4072                                                         if(!isset($colours[$pdbk])){
4073                                                                 // found link in some of the variants, replace the link holder data
4074                                                                 $this->mLinkHolders['titles'][$key] = $variantTitle;
4075                                                                 $this->mLinkHolders['dbkeys'][$key] = $variantTitle->getDBkey();
4076
4077                                                                 // set pdbk and colour
4078                                                                 $pdbks[$key] = $varPdbk;
4079                                                                 if ( $threshold >  0 ) {
4080                                                                         $size = $s->page_len;
4081                                                                         if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
4082                                                                                 $colours[$varPdbk] = 1;
4083                                                                         } else {
4084                                                                                 $colours[$varPdbk] = 2;
4085                                                                         }
4086                                                                 }
4087                                                                 else {
4088                                                                         $colours[$varPdbk] = 1;
4089                                                                 }
4090                                                         }
4091                                                 }
4092                                         }
4093                                 }
4094                         }
4095
4096                         # Construct search and replace arrays
4097                         wfProfileIn( $fname.'-construct' );
4098                         $wgOutputReplace = array();
4099                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4100                                 $pdbk = $pdbks[$key];
4101                                 $searchkey = "<!--LINK $key-->";
4102                                 $title = $this->mLinkHolders['titles'][$key];
4103                                 if ( empty( $colours[$pdbk] ) ) {
4104                                         $linkCache->addBadLinkObj( $title );
4105                                         $colours[$pdbk] = 0;
4106                                         $this->mOutput->addLink( $title, 0 );
4107                                         $wgOutputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
4108                                                                         $this->mLinkHolders['texts'][$key],
4109                                                                         $this->mLinkHolders['queries'][$key] );
4110                                 } elseif ( $colours[$pdbk] == 1 ) {
4111                                         $wgOutputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
4112                                                                         $this->mLinkHolders['texts'][$key],
4113                                                                         $this->mLinkHolders['queries'][$key] );
4114                                 } elseif ( $colours[$pdbk] == 2 ) {
4115                                         $wgOutputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
4116                                                                         $this->mLinkHolders['texts'][$key],
4117                                                                         $this->mLinkHolders['queries'][$key] );
4118                                 }
4119                         }
4120                         wfProfileOut( $fname.'-construct' );
4121
4122                         # Do the thing
4123                         wfProfileIn( $fname.'-replace' );
4124
4125                         $text = preg_replace_callback(
4126                                 '/(<!--LINK .*?-->)/',
4127                                 "wfOutputReplaceMatches",
4128                                 $text);
4129
4130                         wfProfileOut( $fname.'-replace' );
4131                 }
4132
4133                 # Now process interwiki link holders
4134                 # This is quite a bit simpler than internal links
4135                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
4136                         wfProfileIn( $fname.'-interwiki' );
4137                         # Make interwiki link HTML
4138                         $wgOutputReplace = array();
4139                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
4140                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
4141                                 $wgOutputReplace[$key] = $sk->makeLinkObj( $title, $link );
4142                         }
4143
4144                         $text = preg_replace_callback(
4145                                 '/<!--IWLINK (.*?)-->/',
4146                                 "wfOutputReplaceMatches",
4147                                 $text );
4148                         wfProfileOut( $fname.'-interwiki' );
4149                 }
4150
4151                 wfProfileOut( $fname );
4152                 return $colours;
4153         }
4154
4155         /**
4156          * Replace <!--LINK--> link placeholders with plain text of links
4157          * (not HTML-formatted).
4158          * @param string $text
4159          * @return string
4160          */
4161         function replaceLinkHoldersText( $text ) {
4162                 $fname = 'Parser::replaceLinkHoldersText';
4163                 wfProfileIn( $fname );
4164
4165                 $text = preg_replace_callback(
4166                         '/<!--(LINK|IWLINK) (.*?)-->/',
4167                         array( &$this, 'replaceLinkHoldersTextCallback' ),
4168                         $text );
4169
4170                 wfProfileOut( $fname );
4171                 return $text;
4172         }
4173
4174         /**
4175          * @param array $matches
4176          * @return string
4177          * @private
4178          */
4179         function replaceLinkHoldersTextCallback( $matches ) {
4180                 $type = $matches[1];
4181                 $key  = $matches[2];
4182                 if( $type == 'LINK' ) {
4183                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
4184                                 return $this->mLinkHolders['texts'][$key];
4185                         }
4186                 } elseif( $type == 'IWLINK' ) {
4187                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
4188                                 return $this->mInterwikiLinkHolders['texts'][$key];
4189                         }
4190                 }
4191                 return $matches[0];
4192         }
4193
4194         /**
4195          * Tag hook handler for 'pre'.
4196          */
4197         function renderPreTag( $text, $attribs ) {
4198                 // Backwards-compatibility hack
4199                 $content = preg_replace( '!<nowiki>(.*?)</nowiki>!is', '\\1', $text );
4200
4201                 $attribs = Sanitizer::validateTagAttributes( $attribs, 'pre' );
4202                 return wfOpenElement( 'pre', $attribs ) .
4203                         wfEscapeHTMLTagsOnly( $content ) .
4204                         '</pre>';
4205         }
4206
4207         /**
4208          * Renders an image gallery from a text with one line per image.
4209          * text labels may be given by using |-style alternative text. E.g.
4210          *   Image:one.jpg|The number "1"
4211          *   Image:tree.jpg|A tree
4212          * given as text will return the HTML of a gallery with two images,
4213          * labeled 'The number "1"' and
4214          * 'A tree'.
4215          */
4216         function renderImageGallery( $text, $params ) {
4217                 $ig = new ImageGallery();
4218                 $ig->setShowBytes( false );
4219                 $ig->setShowFilename( false );
4220                 $ig->setParsing();
4221                 $ig->useSkin( $this->mOptions->getSkin() );
4222
4223                 if( isset( $params['caption'] ) )
4224                         $ig->setCaption( $params['caption'] );
4225
4226                 $lines = explode( "\n", $text );
4227                 foreach ( $lines as $line ) {
4228                         # match lines like these:
4229                         # Image:someimage.jpg|This is some image
4230                         $matches = array();
4231                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
4232                         # Skip empty lines
4233                         if ( count( $matches ) == 0 ) {
4234                                 continue;
4235                         }
4236                         $tp = Title::newFromText( $matches[1] );
4237                         $nt =& $tp;
4238                         if( is_null( $nt ) ) {
4239                                 # Bogus title. Ignore these so we don't bomb out later.
4240                                 continue;
4241                         }
4242                         if ( isset( $matches[3] ) ) {
4243                                 $label = $matches[3];
4244                         } else {
4245                                 $label = '';
4246                         }
4247
4248                         $pout = $this->parse( $label,
4249                                 $this->mTitle,
4250                                 $this->mOptions,
4251                                 false, // Strip whitespace...?
4252                                 false  // Don't clear state!
4253                         );
4254                         $html = $pout->getText();
4255
4256                         $ig->add( new Image( $nt ), $html );
4257
4258                         # Only add real images (bug #5586)
4259                         if ( $nt->getNamespace() == NS_IMAGE ) {
4260                                 $this->mOutput->addImage( $nt->getDBkey() );
4261                         }
4262                 }
4263                 return $ig->toHTML();
4264         }
4265
4266         /**
4267          * Parse image options text and use it to make an image
4268          */
4269         function makeImage( $nt, $options ) {
4270                 global $wgUseImageResize, $wgDjvuRenderer;
4271
4272                 $align = '';
4273
4274                 # Check if the options text is of the form "options|alt text"
4275                 # Options are:
4276                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4277                 #  * left               no resizing, just left align. label is used for alt= only
4278                 #  * right              same, but right aligned
4279                 #  * none               same, but not aligned
4280                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4281                 #  * center             center the image
4282                 #  * framed             Keep original image size, no magnify-button.
4283
4284                 $part = explode( '|', $options);
4285
4286                 $mwThumb  =& MagicWord::get( 'img_thumbnail' );
4287                 $mwManualThumb =& MagicWord::get( 'img_manualthumb' );
4288                 $mwLeft   =& MagicWord::get( 'img_left' );
4289                 $mwRight  =& MagicWord::get( 'img_right' );
4290                 $mwNone   =& MagicWord::get( 'img_none' );
4291                 $mwWidth  =& MagicWord::get( 'img_width' );
4292                 $mwCenter =& MagicWord::get( 'img_center' );
4293                 $mwFramed =& MagicWord::get( 'img_framed' );
4294                 $mwPage   =& MagicWord::get( 'img_page' );
4295                 $caption = '';
4296
4297                 $width = $height = $framed = $thumb = false;
4298                 $page = null;
4299                 $manual_thumb = '' ;
4300
4301                 foreach( $part as $val ) {
4302                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
4303                                 $thumb=true;
4304                         } elseif ( ! is_null( $match = $mwManualThumb->matchVariableStartToEnd($val) ) ) {
4305                                 # use manually specified thumbnail
4306                                 $thumb=true;
4307                                 $manual_thumb = $match;
4308                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
4309                                 # remember to set an alignment, don't render immediately
4310                                 $align = 'right';
4311                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
4312                                 # remember to set an alignment, don't render immediately
4313                                 $align = 'left';
4314                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
4315                                 # remember to set an alignment, don't render immediately
4316                                 $align = 'center';
4317                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
4318                                 # remember to set an alignment, don't render immediately
4319                                 $align = 'none';
4320                         } elseif ( isset( $wgDjvuRenderer ) && $wgDjvuRenderer
4321                                    && ! is_null( $match = $mwPage->matchVariableStartToEnd($val) ) ) {
4322                                 # Select a page in a multipage document
4323                                 $page = $match;
4324                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
4325                                 wfDebug( "img_width match: $match\n" );
4326                                 # $match is the image width in pixels
4327                                 $m = array();
4328                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
4329                                         $width = intval( $m[1] );
4330                                         $height = intval( $m[2] );
4331                                 } else {
4332                                         $width = intval($match);
4333                                 }
4334                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
4335                                 $framed=true;
4336                         } else {
4337                                 $caption = $val;
4338                         }
4339                 }
4340                 # Strip bad stuff out of the alt text
4341                 $alt = $this->replaceLinkHoldersText( $caption );
4342
4343                 # make sure there are no placeholders in thumbnail attributes
4344                 # that are later expanded to html- so expand them now and
4345                 # remove the tags
4346                 $alt = $this->unstrip($alt, $this->mStripState);
4347                 $alt = Sanitizer::stripAllTags( $alt );
4348
4349                 # Linker does the rest
4350                 $sk =& $this->mOptions->getSkin();
4351                 return $sk->makeImageLinkObj( $nt, $caption, $alt, $align, $width, $height, $framed, $thumb, $manual_thumb, $page );
4352         }
4353
4354         /**
4355          * Set a flag in the output object indicating that the content is dynamic and
4356          * shouldn't be cached.
4357          */
4358         function disableCache() {
4359                 wfDebug( "Parser output marked as uncacheable.\n" );
4360                 $this->mOutput->mCacheTime = -1;
4361         }
4362
4363         /**#@+
4364          * Callback from the Sanitizer for expanding items found in HTML attribute
4365          * values, so they can be safely tested and escaped.
4366          * @param string $text
4367          * @param array $args
4368          * @return string
4369          * @private
4370          */
4371         function attributeStripCallback( &$text, $args ) {
4372                 $text = $this->replaceVariables( $text, $args );
4373                 $text = $this->unstripForHTML( $text );
4374                 return $text;
4375         }
4376
4377         function unstripForHTML( $text ) {
4378                 $text = $this->unstrip( $text, $this->mStripState );
4379                 $text = $this->unstripNoWiki( $text, $this->mStripState );
4380                 return $text;
4381         }
4382         /**#@-*/
4383
4384         /**#@+
4385          * Accessor/mutator
4386          */
4387         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4388         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4389         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4390         /**#@-*/
4391
4392         /**#@+
4393          * Accessor
4394          */
4395         function getTags() { return array_keys( $this->mTagHooks ); }
4396         /**#@-*/
4397
4398
4399         /**
4400          * Break wikitext input into sections, and either pull or replace
4401          * some particular section's text.
4402          *
4403          * External callers should use the getSection and replaceSection methods.
4404          *
4405          * @param $text Page wikitext
4406          * @param $section Numbered section. 0 pulls the text before the first
4407          *                 heading; other numbers will pull the given section
4408          *                 along with its lower-level subsections.
4409          * @param $mode One of "get" or "replace"
4410          * @param $newtext Replacement text for section data.
4411          * @return string for "get", the extracted section text.
4412          *                for "replace", the whole page with the section replaced.
4413          */
4414         private function extractSections( $text, $section, $mode, $newtext='' ) {
4415                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
4416                 # comments to be stripped as well)
4417                 $striparray = array();
4418
4419                 $oldOutputType = $this->mOutputType;
4420                 $oldOptions = $this->mOptions;
4421                 $this->mOptions = new ParserOptions();
4422                 $this->setOutputType( OT_WIKI );
4423
4424                 $striptext = $this->strip( $text, $striparray, true );
4425
4426                 $this->setOutputType( $oldOutputType );
4427                 $this->mOptions = $oldOptions;
4428
4429                 # now that we can be sure that no pseudo-sections are in the source,
4430                 # split it up by section
4431                 $uniq = preg_quote( $this->uniqPrefix(), '/' );
4432                 $comment = "(?:$uniq-!--.*?QINU)";
4433                 $secs = preg_split(
4434                 /*
4435                         "/
4436                         ^(
4437                         (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4438                         (?:
4439                                 (=+) # Should this be limited to 6?
4440                                 .+?  # Section title...
4441                                 \\2  # Ending = count must match start
4442                         |
4443                                 ^
4444                                 <h([1-6])\b.*?>
4445                                 .*?
4446                                 <\/h\\3\s*>
4447                         )
4448                         (?:$comment|<\/?noinclude>|\s+)* # Trailing whitespace ok
4449                         )$
4450                         /mix",
4451                 */
4452                         "/
4453                         (
4454                                 ^
4455                                 (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4456                                 (=+) # Should this be limited to 6?
4457                                 .+?  # Section title...
4458                                 \\2  # Ending = count must match start
4459                                 (?:$comment|<\/?noinclude>|[ \\t]+)* # Trailing whitespace ok
4460                                 $
4461                         |
4462                                 <h([1-6])\b.*?>
4463                                 .*?
4464                                 <\/h\\3\s*>
4465                         )
4466                         /mix",
4467                         $striptext, -1,
4468                         PREG_SPLIT_DELIM_CAPTURE);
4469
4470                 if( $mode == "get" ) {
4471                         if( $section == 0 ) {
4472                                 // "Section 0" returns the content before any other section.
4473                                 $rv = $secs[0];
4474                         } else {
4475                                 $rv = "";
4476                         }
4477                 } elseif( $mode == "replace" ) {
4478                         if( $section == 0 ) {
4479                                 $rv = $newtext . "\n\n";
4480                                 $remainder = true;
4481                         } else {
4482                                 $rv = $secs[0];
4483                                 $remainder = false;
4484                         }
4485                 }
4486                 $count = 0;
4487                 $sectionLevel = 0;
4488                 for( $index = 1; $index < count( $secs ); ) {
4489                         $headerLine = $secs[$index++];
4490                         if( $secs[$index] ) {
4491                                 // A wiki header
4492                                 $headerLevel = strlen( $secs[$index++] );
4493                         } else {
4494                                 // An HTML header
4495                                 $index++;
4496                                 $headerLevel = intval( $secs[$index++] );
4497                         }
4498                         $content = $secs[$index++];
4499
4500                         $count++;
4501                         if( $mode == "get" ) {
4502                                 if( $count == $section ) {
4503                                         $rv = $headerLine . $content;
4504                                         $sectionLevel = $headerLevel;
4505                                 } elseif( $count > $section ) {
4506                                         if( $sectionLevel && $headerLevel > $sectionLevel ) {
4507                                                 $rv .= $headerLine . $content;
4508                                         } else {
4509                                                 // Broke out to a higher-level section
4510                                                 break;
4511                                         }
4512                                 }
4513                         } elseif( $mode == "replace" ) {
4514                                 if( $count < $section ) {
4515                                         $rv .= $headerLine . $content;
4516                                 } elseif( $count == $section ) {
4517                                         $rv .= $newtext . "\n\n";
4518                                         $sectionLevel = $headerLevel;
4519                                 } elseif( $count > $section ) {
4520                                         if( $headerLevel <= $sectionLevel ) {
4521                                                 // Passed the section's sub-parts.
4522                                                 $remainder = true;
4523                                         }
4524                                         if( $remainder ) {
4525                                                 $rv .= $headerLine . $content;
4526                                         }
4527                                 }
4528                         }
4529                 }
4530                 # reinsert stripped tags
4531                 $rv = $this->unstrip( $rv, $striparray );
4532                 $rv = $this->unstripNoWiki( $rv, $striparray );
4533                 $rv = trim( $rv );
4534                 return $rv;
4535         }
4536
4537         /**
4538          * This function returns the text of a section, specified by a number ($section).
4539          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
4540          * the first section before any such heading (section 0).
4541          *
4542          * If a section contains subsections, these are also returned.
4543          *
4544          * @param $text String: text to look in
4545          * @param $section Integer: section number
4546          * @return string text of the requested section
4547          */
4548         function getSection( $text, $section ) {
4549                 return $this->extractSections( $text, $section, "get" );
4550         }
4551
4552         function replaceSection( $oldtext, $section, $text ) {
4553                 return $this->extractSections( $oldtext, $section, "replace", $text );
4554         }
4555
4556 }
4557
4558 /**
4559  * @todo document
4560  * @package MediaWiki
4561  */
4562 class ParserOutput
4563 {
4564         var $mText,             # The output text
4565                 $mLanguageLinks,    # List of the full text of language links, in the order they appear
4566                 $mCategories,       # Map of category names to sort keys
4567                 $mContainsOldMagic, # Boolean variable indicating if the input contained variables like {{CURRENTDAY}}
4568                 $mCacheTime,        # Time when this object was generated, or -1 for uncacheable. Used in ParserCache.
4569                 $mVersion,          # Compatibility check
4570                 $mTitleText,        # title text of the chosen language variant
4571                 $mLinks,            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
4572                 $mTemplates,        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
4573                 $mImages,           # DB keys of the images used, in the array key only
4574                 $mExternalLinks,    # External link URLs, in the key only
4575                 $mHTMLtitle,            # Display HTML title
4576                 $mSubtitle,                     # Additional subtitle
4577                 $mNewSection,           # Show a new section link?
4578                 $mNoGallery;            # No gallery on category page? (__NOGALLERY__)
4579
4580         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
4581                 $containsOldMagic = false, $titletext = '' )
4582         {
4583                 $this->mText = $text;
4584                 $this->mLanguageLinks = $languageLinks;
4585                 $this->mCategories = $categoryLinks;
4586                 $this->mContainsOldMagic = $containsOldMagic;
4587                 $this->mCacheTime = '';
4588                 $this->mVersion = MW_PARSER_VERSION;
4589                 $this->mTitleText = $titletext;
4590                 $this->mLinks = array();
4591                 $this->mTemplates = array();
4592                 $this->mImages = array();
4593                 $this->mExternalLinks = array();
4594                 $this->mHTMLtitle = "" ;
4595                 $this->mSubtitle = "" ;
4596                 $this->mNewSection = false;
4597                 $this->mNoGallery = false;
4598         }
4599
4600         function getText()                   { return $this->mText; }
4601         function &getLanguageLinks()          { return $this->mLanguageLinks; }
4602         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
4603         function &getCategories()            { return $this->mCategories; }
4604         function getCacheTime()              { return $this->mCacheTime; }
4605         function getTitleText()              { return $this->mTitleText; }
4606         function &getLinks()                 { return $this->mLinks; }
4607         function &getTemplates()             { return $this->mTemplates; }
4608         function &getImages()                { return $this->mImages; }
4609         function &getExternalLinks()         { return $this->mExternalLinks; }
4610         function getNoGallery()              { return $this->mNoGallery; }
4611         function getSubtitle()               { return $this->mSubtitle; }
4612
4613         function containsOldMagic()          { return $this->mContainsOldMagic; }
4614         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
4615         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
4616         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
4617         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
4618         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
4619         function setTitleText( $t )          { return wfSetVar($this->mTitleText, $t); }
4620         function setSubtitle( $st )          { return wfSetVar( $this->mSubtitle, $st ); }
4621
4622         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
4623         function addImage( $name )           { $this->mImages[$name] = 1; }
4624         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
4625         function addExternalLink( $url )     { $this->mExternalLinks[$url] = 1; }
4626
4627         function setNewSection( $value ) {
4628                 $this->mNewSection = (bool)$value;
4629         }
4630         function getNewSection() {
4631                 return (bool)$this->mNewSection;
4632         }
4633
4634         function addLink( $title, $id = null ) {
4635                 $ns = $title->getNamespace();
4636                 $dbk = $title->getDBkey();
4637                 if ( !isset( $this->mLinks[$ns] ) ) {
4638                         $this->mLinks[$ns] = array();
4639                 }
4640                 if ( is_null( $id ) ) {
4641                         $id = $title->getArticleID();
4642                 }
4643                 $this->mLinks[$ns][$dbk] = $id;
4644         }
4645
4646         function addTemplate( $title, $id ) {
4647                 $ns = $title->getNamespace();
4648                 $dbk = $title->getDBkey();
4649                 if ( !isset( $this->mTemplates[$ns] ) ) {
4650                         $this->mTemplates[$ns] = array();
4651                 }
4652                 $this->mTemplates[$ns][$dbk] = $id;
4653         }
4654
4655         /**
4656          * Return true if this cached output object predates the global or
4657          * per-article cache invalidation timestamps, or if it comes from
4658          * an incompatible older version.
4659          *
4660          * @param string $touched the affected article's last touched timestamp
4661          * @return bool
4662          * @public
4663          */
4664         function expired( $touched ) {
4665                 global $wgCacheEpoch;
4666                 return $this->getCacheTime() == -1 || // parser says it's uncacheable
4667                        $this->getCacheTime() < $touched ||
4668                        $this->getCacheTime() <= $wgCacheEpoch ||
4669                        !isset( $this->mVersion ) ||
4670                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
4671         }
4672 }
4673
4674 /**
4675  * Set options of the Parser
4676  * @todo document
4677  * @package MediaWiki
4678  */
4679 class ParserOptions
4680 {
4681         # All variables are supposed to be private in theory, although in practise this is not the case.
4682         var $mUseTeX;                    # Use texvc to expand <math> tags
4683         var $mUseDynamicDates;           # Use DateFormatter to format dates
4684         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
4685         var $mAllowExternalImages;       # Allow external images inline
4686         var $mAllowExternalImagesFrom;   # If not, any exception?
4687         var $mSkin;                      # Reference to the preferred skin
4688         var $mDateFormat;                # Date format index
4689         var $mEditSection;               # Create "edit section" links
4690         var $mNumberHeadings;            # Automatically number headings
4691         var $mAllowSpecialInclusion;     # Allow inclusion of special pages
4692         var $mTidy;                      # Ask for tidy cleanup
4693         var $mInterfaceMessage;          # Which lang to call for PLURAL and GRAMMAR
4694         var $mMaxIncludeSize;            # Maximum size of template expansions, in bytes
4695         var $mRemoveComments;            # Remove HTML comments. ONLY APPLIES TO PREPROCESS OPERATIONS
4696
4697         var $mUser;                      # Stored user object, just used to initialise the skin
4698
4699         function getUseTeX()                        { return $this->mUseTeX; }
4700         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
4701         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
4702         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
4703         function getAllowExternalImagesFrom()       { return $this->mAllowExternalImagesFrom; }
4704         function getEditSection()                   { return $this->mEditSection; }
4705         function getNumberHeadings()                { return $this->mNumberHeadings; }
4706         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
4707         function getTidy()                          { return $this->mTidy; }
4708         function getInterfaceMessage()              { return $this->mInterfaceMessage; }
4709         function getMaxIncludeSize()                { return $this->mMaxIncludeSize; }
4710         function getRemoveComments()                { return $this->mRemoveComments; }
4711
4712         function &getSkin() {
4713                 if ( !isset( $this->mSkin ) ) {
4714                         $this->mSkin = $this->mUser->getSkin();
4715                 }
4716                 return $this->mSkin;
4717         }
4718
4719         function getDateFormat() {
4720                 if ( !isset( $this->mDateFormat ) ) {
4721                         $this->mDateFormat = $this->mUser->getDatePreference();
4722                 }
4723                 return $this->mDateFormat;
4724         }
4725
4726         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
4727         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
4728         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
4729         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
4730         function setAllowExternalImagesFrom( $x )   { return wfSetVar( $this->mAllowExternalImagesFrom, $x ); }
4731         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
4732         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
4733         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
4734         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
4735         function setTidy( $x )                      { return wfSetVar( $this->mTidy, $x); }
4736         function setSkin( $x )                      { $this->mSkin = $x; }
4737         function setInterfaceMessage( $x )          { return wfSetVar( $this->mInterfaceMessage, $x); }
4738         function setMaxIncludeSize( $x )            { return wfSetVar( $this->mMaxIncludeSize, $x ); }
4739         function setRemoveComments( $x )            { return wfSetVar( $this->mRemoveComments, $x ); }
4740
4741         function ParserOptions( $user = null ) {
4742                 $this->initialiseFromUser( $user );
4743         }
4744
4745         /**
4746          * Get parser options
4747          * @static
4748          */
4749         static function newFromUser( $user ) {
4750                 return new ParserOptions( $user );
4751         }
4752
4753         /** Get user options */
4754         function initialiseFromUser( $userInput ) {
4755                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
4756                 global $wgAllowExternalImagesFrom, $wgAllowSpecialInclusion, $wgMaxArticleSize;
4757                 $fname = 'ParserOptions::initialiseFromUser';
4758                 wfProfileIn( $fname );
4759                 if ( !$userInput ) {
4760                         global $wgUser;
4761                         if ( isset( $wgUser ) ) {
4762                                 $user = $wgUser;
4763                         } else {
4764                                 $user = new User;
4765                         }
4766                 } else {
4767                         $user =& $userInput;
4768                 }
4769
4770                 $this->mUser = $user;
4771
4772                 $this->mUseTeX = $wgUseTeX;
4773                 $this->mUseDynamicDates = $wgUseDynamicDates;
4774                 $this->mInterwikiMagic = $wgInterwikiMagic;
4775                 $this->mAllowExternalImages = $wgAllowExternalImages;
4776                 $this->mAllowExternalImagesFrom = $wgAllowExternalImagesFrom;
4777                 $this->mSkin = null; # Deferred
4778                 $this->mDateFormat = null; # Deferred
4779                 $this->mEditSection = true;
4780                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
4781                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
4782                 $this->mTidy = false;
4783                 $this->mInterfaceMessage = false;
4784                 $this->mMaxIncludeSize = $wgMaxArticleSize * 1024;
4785                 $this->mRemoveComments = true;
4786                 wfProfileOut( $fname );
4787         }
4788 }
4789
4790 /**
4791  * Callback function used by Parser::replaceLinkHolders()
4792  * to substitute link placeholders.
4793  */
4794 function &wfOutputReplaceMatches( $matches ) {
4795         global $wgOutputReplace;
4796         return $wgOutputReplace[$matches[1]];
4797 }
4798
4799 /**
4800  * Return the total number of articles
4801  */
4802 function wfNumberOfArticles() {
4803         global $wgNumberOfArticles;
4804
4805         wfLoadSiteStats();
4806         return $wgNumberOfArticles;
4807 }
4808
4809 /**
4810  * Return the number of files
4811  */
4812 function wfNumberOfFiles() {
4813         $fname = 'wfNumberOfFiles';
4814
4815         wfProfileIn( $fname );
4816         $dbr =& wfGetDB( DB_SLAVE );
4817         $numImages = $dbr->selectField('site_stats', 'ss_images', array(), $fname );
4818         wfProfileOut( $fname );
4819
4820         return $numImages;
4821 }
4822
4823 /**
4824  * Return the number of user accounts
4825  * @return integer
4826  */
4827 function wfNumberOfUsers() {
4828         wfProfileIn( 'wfNumberOfUsers' );
4829         $dbr =& wfGetDB( DB_SLAVE );
4830         $count = $dbr->selectField( 'site_stats', 'ss_users', array(), 'wfNumberOfUsers' );
4831         wfProfileOut( 'wfNumberOfUsers' );
4832         return (int)$count;
4833 }
4834
4835 /**
4836  * Return the total number of pages
4837  * @return integer
4838  */
4839 function wfNumberOfPages() {
4840         wfProfileIn( 'wfNumberOfPages' );
4841         $dbr =& wfGetDB( DB_SLAVE );
4842         $count = $dbr->selectField( 'site_stats', 'ss_total_pages', array(), 'wfNumberOfPages' );
4843         wfProfileOut( 'wfNumberOfPages' );
4844         return (int)$count;
4845 }
4846
4847 /**
4848  * Return the total number of admins
4849  *
4850  * @return integer
4851  */
4852 function wfNumberOfAdmins() {
4853         static $admins = -1;
4854         wfProfileIn( 'wfNumberOfAdmins' );
4855         if( $admins == -1 ) {
4856                 $dbr =& wfGetDB( DB_SLAVE );
4857                 $admins = $dbr->selectField( 'user_groups', 'COUNT(*)', array( 'ug_group' => 'sysop' ), 'wfNumberOfAdmins' );
4858         }
4859         wfProfileOut( 'wfNumberOfAdmins' );
4860         return (int)$admins;
4861 }
4862
4863 /**
4864  * Count the number of pages in a particular namespace
4865  *
4866  * @param $ns Namespace
4867  * @return integer
4868  */
4869 function wfPagesInNs( $ns ) {
4870         static $pageCount = array();
4871         wfProfileIn( 'wfPagesInNs' );
4872         if( !isset( $pageCount[$ns] ) ) {
4873                 $dbr =& wfGetDB( DB_SLAVE );
4874                 $pageCount[$ns] = $dbr->selectField( 'page', 'COUNT(*)', array( 'page_namespace' => $ns ), 'wfPagesInNs' );
4875         }
4876         wfProfileOut( 'wfPagesInNs' );
4877         return (int)$pageCount[$ns];
4878 }
4879
4880 /**
4881  * Get various statistics from the database
4882  * @private
4883  */
4884 function wfLoadSiteStats() {
4885         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
4886         $fname = 'wfLoadSiteStats';
4887
4888         if ( -1 != $wgNumberOfArticles ) return;
4889         $dbr =& wfGetDB( DB_SLAVE );
4890         $s = $dbr->selectRow( 'site_stats',
4891                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
4892                 array( 'ss_row_id' => 1 ), $fname
4893         );
4894
4895         if ( $s === false ) {
4896                 return;
4897         } else {
4898                 $wgTotalViews = $s->ss_total_views;
4899                 $wgTotalEdits = $s->ss_total_edits;
4900                 $wgNumberOfArticles = $s->ss_good_articles;
4901         }
4902 }
4903
4904 /**
4905  * Get revision timestamp from the database considering timecorrection
4906  *
4907  * @param $id Int: page revision id
4908  * @return integer
4909  */
4910 function wfRevisionTimestamp( $id ) {
4911         global $wgContLang;
4912         $fname = 'wfRevisionTimestamp';
4913
4914         wfProfileIn( $fname );
4915         $dbr =& wfGetDB( DB_SLAVE );
4916         $timestamp = $dbr->selectField( 'revision', 'rev_timestamp',
4917                         array( 'rev_id' => $id ), __METHOD__ );
4918         $timestamp = $wgContLang->userAdjust( $timestamp );
4919         wfProfileOut( $fname );
4920
4921         return $timestamp;
4922 }
4923
4924 /**
4925  * Escape html tags
4926  * Basically replacing " > and < with HTML entities ( &quot;, &gt;, &lt;)
4927  *
4928  * @param $in String: text that might contain HTML tags.
4929  * @return string Escaped string
4930  */
4931 function wfEscapeHTMLTagsOnly( $in ) {
4932         return str_replace(
4933                 array( '"', '>', '<' ),
4934                 array( '&quot;', '&gt;', '&lt;' ),
4935                 $in );
4936 }
4937
4938 ?>