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 three 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  *
  73  * Globals used:
  74  *    objects:   $wgLang, $wgContLang
  75  *
  76  * NOT $wgArticle, $wgUser or $wgTitle. Keep them away!
  77  *
  78  * settings:
  79  *  $wgUseTex*, $wgUseDynamicDates*, $wgInterwikiMagic*,
  80  *  $wgNamespacesWithSubpages, $wgAllowExternalImages*,
  81  *  $wgLocaltimezone, $wgAllowSpecialInclusion*,
  82  *  $wgMaxArticleSize*
  83  *
  84  *  * only within ParserOptions
  85  * </pre>
  86  *
  87  * @package MediaWiki
  88  */
  89 class Parser
  90 {
  91         /**#@+
  92          * @private
  93          */
  94         # Persistent:
  95         var $mTagHooks, $mFunctionHooks, $mFunctionSynonyms, $mVariables;
  96
  97         # Cleared with clearState():
  98         var $mOutput, $mAutonumber, $mDTopen, $mStripState = array();
  99         var $mIncludeCount, $mArgStack, $mLastSection, $mInPre;
 100         var $mInterwikiLinkHolders, $mLinkHolders, $mUniqPrefix;
 101         var $mIncludeSizes;
 102         var $mTemplates,        // cache of already loaded templates, avoids
 103                                 // multiple SQL queries for the same string
 104             $mTemplatePath;     // stores an unsorted hash of all the templates already loaded
 105                                 // in this path. Used for loop detection.
 106
 107         # Temporary
 108         # These are variables reset at least once per parse regardless of $clearState
 109         var $mOptions,      // ParserOptions object
 110                 $mTitle,        // Title context, used for self-link rendering and similar things
 111                 $mOutputType,   // Output type, one of the OT_xxx constants
 112                 $ot,            // Shortcut alias, see setOutputType()
 113                 $mRevisionId;   // ID to display in {{REVISIONID}} tags
 114
 115         /**#@-*/
 116
 117         /**
 118          * Constructor
 119          *
 120          * @public
 121          */
 122         function Parser() {
 123                 $this->mTagHooks = array();
 124                 $this->mFunctionHooks = array();
 125                 $this->mFunctionSynonyms = array( 0 => array(), 1 => array() );
 126                 $this->mFirstCall = true;
 127         }
 128
 129         /**
 130          * Do various kinds of initialisation on the first call of the parser
 131          */
 132         function firstCallInit() {
 133                 if ( !$this->mFirstCall ) {
 134                         return;
 135                 }
 136
 137                 wfProfileIn( __METHOD__ );
 138                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
 139
 140                 $this->setHook( 'pre', array( $this, 'renderPreTag' ) );
 141
 142                 $this->setFunctionHook( 'int', array( 'CoreParserFunctions', 'intFunction' ), SFH_NO_HASH );
 143                 $this->setFunctionHook( 'ns', array( 'CoreParserFunctions', 'ns' ), SFH_NO_HASH );
 144                 $this->setFunctionHook( 'urlencode', array( 'CoreParserFunctions', 'urlencode' ), SFH_NO_HASH );
 145                 $this->setFunctionHook( 'lcfirst', array( 'CoreParserFunctions', 'lcfirst' ), SFH_NO_HASH );
 146                 $this->setFunctionHook( 'ucfirst', array( 'CoreParserFunctions', 'ucfirst' ), SFH_NO_HASH );
 147                 $this->setFunctionHook( 'lc', array( 'CoreParserFunctions', 'lc' ), SFH_NO_HASH );
 148                 $this->setFunctionHook( 'uc', array( 'CoreParserFunctions', 'uc' ), SFH_NO_HASH );
 149                 $this->setFunctionHook( 'localurl', array( 'CoreParserFunctions', 'localurl' ), SFH_NO_HASH );
 150                 $this->setFunctionHook( 'localurle', array( 'CoreParserFunctions', 'localurle' ), SFH_NO_HASH );
 151                 $this->setFunctionHook( 'fullurl', array( 'CoreParserFunctions', 'fullurl' ), SFH_NO_HASH );
 152                 $this->setFunctionHook( 'fullurle', array( 'CoreParserFunctions', 'fullurle' ), SFH_NO_HASH );
 153                 $this->setFunctionHook( 'formatnum', array( 'CoreParserFunctions', 'formatnum' ), SFH_NO_HASH );
 154                 $this->setFunctionHook( 'grammar', array( 'CoreParserFunctions', 'grammar' ), SFH_NO_HASH );
 155                 $this->setFunctionHook( 'plural', array( 'CoreParserFunctions', 'plural' ), SFH_NO_HASH );
 156                 $this->setFunctionHook( 'numberofpages', array( 'CoreParserFunctions', 'numberofpages' ), SFH_NO_HASH );
 157                 $this->setFunctionHook( 'numberofusers', array( 'CoreParserFunctions', 'numberofusers' ), SFH_NO_HASH );
 158                 $this->setFunctionHook( 'numberofarticles', array( 'CoreParserFunctions', 'numberofarticles' ), SFH_NO_HASH );
 159                 $this->setFunctionHook( 'numberoffiles', array( 'CoreParserFunctions', 'numberoffiles' ), SFH_NO_HASH );
 160                 $this->setFunctionHook( 'numberofadmins', array( 'CoreParserFunctions', 'numberofadmins' ), SFH_NO_HASH );
 161                 $this->setFunctionHook( 'language', array( 'CoreParserFunctions', 'language' ), SFH_NO_HASH );
 162                 $this->setFunctionHook( 'padleft', array( 'CoreParserFunctions', 'padleft' ), SFH_NO_HASH );
 163                 $this->setFunctionHook( 'padright', array( 'CoreParserFunctions', 'padright' ), SFH_NO_HASH );
 164                 $this->setFunctionHook( 'anchorencode', array( 'CoreParserFunctions', 'anchorencode' ), SFH_NO_HASH );
 165
 166                 if ( $wgAllowDisplayTitle ) {
 167                         $this->setFunctionHook( 'displaytitle', array( 'CoreParserFunctions', 'displaytitle' ), SFH_NO_HASH );
 168                 }
 169                 if ( $wgAllowSlowParserFunctions ) {
 170                         $this->setFunctionHook( 'pagesinnamespace', array( 'CoreParserFunctions', 'pagesinnamespace' ), SFH_NO_HASH );
 171                 }
 172
 173                 $this->initialiseVariables();
 174
 175                 $this->mFirstCall = false;
 176                 wfProfileOut( __METHOD__ );
 177         }
 178
 179         /**
 180          * Clear Parser state
 181          *
 182          * @private
 183          */
 184         function clearState() {
 185                 wfProfileIn( __METHOD__ );
 186                 if ( $this->mFirstCall ) {
 187                         $this->firstCallInit();
 188                 }
 189                 $this->mOutput = new ParserOutput;
 190                 $this->mAutonumber = 0;
 191                 $this->mLastSection = '';
 192                 $this->mDTopen = false;
 193                 $this->mIncludeCount = array();
 194                 $this->mStripState = array();
 195                 $this->mArgStack = array();
 196                 $this->mInPre = false;
 197                 $this->mInterwikiLinkHolders = array(
 198                         'texts' => array(),
 199                         'titles' => array()
 200                 );
 201                 $this->mLinkHolders = array(
 202                         'namespaces' => array(),
 203                         'dbkeys' => array(),
 204                         'queries' => array(),
 205                         'texts' => array(),
 206                         'titles' => array()
 207                 );
 208                 $this->mRevisionId = null;
 209
 210                 /**
 211                  * Prefix for temporary replacement strings for the multipass parser.
 212                  * \x07 should never appear in input as it's disallowed in XML.
 213                  * Using it at the front also gives us a little extra robustness
 214                  * since it shouldn't match when butted up against identifier-like
 215                  * string constructs.
 216                  */
 217                 $this->mUniqPrefix = "\x07UNIQ" . Parser::getRandomString();
 218
 219                 # Clear these on every parse, bug 4549
 220                 $this->mTemplates = array();
 221                 $this->mTemplatePath = array();
 222
 223                 $this->mShowToc = true;
 224                 $this->mForceTocPosition = false;
 225                 $this->mIncludeSizes = array(
 226                         'pre-expand' => 0,
 227                         'post-expand' => 0,
 228                         'arg' => 0
 229                 );
 230
 231                 wfRunHooks( 'ParserClearState', array( &$this ) );
 232                 wfProfileOut( __METHOD__ );
 233         }
 234
 235         function setOutputType( $ot ) {
 236                 $this->mOutputType = $ot;
 237                 // Shortcut alias
 238                 $this->ot = array(
 239                         'html' => $ot == OT_HTML,
 240                         'wiki' => $ot == OT_WIKI,
 241                         'msg' => $ot == OT_MSG,
 242                         'pre' => $ot == OT_PREPROCESS,
 243                 );
 244         }
 245
 246         /**
 247          * Accessor for mUniqPrefix.
 248          *
 249          * @public
 250          */
 251         function uniqPrefix() {
 252                 return $this->mUniqPrefix;
 253         }
 254
 255         /**
 256          * Convert wikitext to HTML
 257          * Do not call this function recursively.
 258          *
 259          * @private
 260          * @param string $text Text we want to parse
 261          * @param Title &$title A title object
 262          * @param array $options
 263          * @param boolean $linestart
 264          * @param boolean $clearState
 265          * @param int $revid number to pass in {{REVISIONID}}
 266          * @return ParserOutput a ParserOutput
 267          */
 268         function parse( $text, &$title, $options, $linestart = true, $clearState = true, $revid = null ) {
 269                 /**
 270                  * First pass--just handle <nowiki> sections, pass the rest off
 271                  * to internalParse() which does all the real work.
 272                  */
 273
 274                 global $wgUseTidy, $wgAlwaysUseTidy, $wgContLang;
 275                 $fname = 'Parser::parse-' . wfGetCaller();
 276                 wfProfileIn( $fname );
 277
 278                 if ( $clearState ) {
 279                         $this->clearState();
 280                 }
 281
 282                 $this->mOptions = $options;
 283                 $this->mTitle =& $title;
 284                 $oldRevisionId = $this->mRevisionId;
 285                 if( $revid !== null ) {
 286                         $this->mRevisionId = $revid;
 287                 }
 288                 $this->setOutputType( OT_HTML );
 289
 290                 //$text = $this->strip( $text, $this->mStripState );
 291                 // VOODOO MAGIC FIX! Sometimes the above segfaults in PHP5.
 292                 $x =& $this->mStripState;
 293
 294                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 295                 $text = $this->strip( $text, $x );
 296                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 297
 298                 $text = $this->internalParse( $text );
 299
 300                 $text = $this->unstrip( $text, $this->mStripState );
 301
 302                 # Clean up special characters, only run once, next-to-last before doBlockLevels
 303                 $fixtags = array(
 304                         # french spaces, last one Guillemet-left
 305                         # only if there is something before the space
 306                         '/(.) (?=\\?|:|;|!|\\302\\273)/' => '\\1&nbsp;\\2',
 307                         # french spaces, Guillemet-right
 308                         '/(\\302\\253) /' => '\\1&nbsp;',
 309                 );
 310                 $text = preg_replace( array_keys($fixtags), array_values($fixtags), $text );
 311
 312                 # only once and last
 313                 $text = $this->doBlockLevels( $text, $linestart );
 314
 315                 $this->replaceLinkHolders( $text );
 316
 317                 # the position of the parserConvert() call should not be changed. it
 318                 # assumes that the links are all replaced and the only thing left
 319                 # is the <nowiki> mark.
 320                 # Side-effects: this calls $this->mOutput->setTitleText()
 321                 $text = $wgContLang->parserConvert( $text, $this );
 322
 323                 $text = $this->unstripNoWiki( $text, $this->mStripState );
 324
 325                 wfRunHooks( 'ParserBeforeTidy', array( &$this, &$text ) );
 326
 327                 $text = Sanitizer::normalizeCharReferences( $text );
 328
 329                 if (($wgUseTidy and $this->mOptions->mTidy) or $wgAlwaysUseTidy) {
 330                         $text = Parser::tidy($text);
 331                 } else {
 332                         # attempt to sanitize at least some nesting problems
 333                         # (bug #2702 and quite a few others)
 334                         $tidyregs = array(
 335                                 # ''Something [http://www.cool.com cool''] -->
 336                                 # <i>Something</i><a href="http://www.cool.com"..><i>cool></i></a>
 337                                 '/(<([bi])>)(<([bi])>)?([^<]*)(<\/?a[^<]*>)([^<]*)(<\/\\4>)?(<\/\\2>)/' =>
 338                                 '\\1\\3\\5\\8\\9\\6\\1\\3\\7\\8\\9',
 339                                 # fix up an anchor inside another anchor, only
 340                                 # at least for a single single nested link (bug 3695)
 341                                 '/(<a[^>]+>)([^<]*)(<a[^>]+>[^<]*)<\/a>(.*)<\/a>/' =>
 342                                 '\\1\\2</a>\\3</a>\\1\\4</a>',
 343                                 # fix div inside inline elements- doBlockLevels won't wrap a line which
 344                                 # contains a div, so fix it up here; replace
 345                                 # div with escaped text
 346                                 '/(<([aib]) [^>]+>)([^<]*)(<div([^>]*)>)(.*)(<\/div>)([^<]*)(<\/\\2>)/' =>
 347                                 '\\1\\3&lt;div\\5&gt;\\6&lt;/div&gt;\\8\\9',
 348                                 # remove empty italic or bold tag pairs, some
 349                                 # introduced by rules above
 350                                 '/<([bi])><\/\\1>/' => '',
 351                         );
 352
 353                         $text = preg_replace(
 354                                 array_keys( $tidyregs ),
 355                                 array_values( $tidyregs ),
 356                                 $text );
 357                 }
 358
 359                 wfRunHooks( 'ParserAfterTidy', array( &$this, &$text ) );
 360
 361                 # Information on include size limits, for the benefit of users who try to skirt them
 362                 if ( max( $this->mIncludeSizes ) > 1000 ) {
 363                         $max = $this->mOptions->getMaxIncludeSize();
 364                         $text .= "<!-- \n" .
 365                                 "Pre-expand include size: {$this->mIncludeSizes['pre-expand']} bytes\n" .
 366                                 "Post-expand include size: {$this->mIncludeSizes['post-expand']} bytes\n" .
 367                                 "Template argument size: {$this->mIncludeSizes['arg']} bytes\n" .
 368                                 "Maximum: $max bytes\n" .
 369                                 "-->\n";
 370                 }
 371                 $this->mOutput->setText( $text );
 372                 $this->mRevisionId = $oldRevisionId;
 373                 wfProfileOut( $fname );
 374
 375                 return $this->mOutput;
 376         }
 377
 378         /**
 379          * Recursive parser entry point that can be called from an extension tag
 380          * hook.
 381          */
 382         function recursiveTagParse( $text ) {
 383                 wfProfileIn( __METHOD__ );
 384                 $x =& $this->mStripState;
 385                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 386                 $text = $this->strip( $text, $x );
 387                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 388                 $text = $this->internalParse( $text );
 389                 wfProfileOut( __METHOD__ );
 390                 return $text;
 391         }
 392
 393         /**
 394          * Expand templates and variables in the text, producing valid, static wikitext.
 395          * Also removes comments.
 396          */
 397         function preprocess( $text, $title, $options ) {
 398                 wfProfileIn( __METHOD__ );
 399                 $this->clearState();
 400                 $this->setOutputType( OT_PREPROCESS );
 401                 $this->mOptions = $options;
 402                 $this->mTitle = $title;
 403                 $x =& $this->mStripState;
 404                 wfRunHooks( 'ParserBeforeStrip', array( &$this, &$text, &$x ) );
 405                 $text = $this->strip( $text, $x );
 406                 wfRunHooks( 'ParserAfterStrip', array( &$this, &$text, &$x ) );
 407                 if ( $this->mOptions->getRemoveComments() ) {
 408                         $text = Sanitizer::removeHTMLcomments( $text );
 409                 }
 410                 $text = $this->replaceVariables( $text );
 411                 $text = $this->unstrip( $text, $x );
 412                 $text = $this->unstripNowiki( $text, $x );
 413                 wfProfileOut( __METHOD__ );
 414                 return $text;
 415         }
 416
 417         /**
 418          * Get a random string
 419          *
 420          * @private
 421          * @static
 422          */
 423         function getRandomString() {
 424                 return dechex(mt_rand(0, 0x7fffffff)) . dechex(mt_rand(0, 0x7fffffff));
 425         }
 426
 427         function &getTitle() { return $this->mTitle; }
 428         function getOptions() { return $this->mOptions; }
 429
 430         function getFunctionLang() {
 431                 global $wgLang, $wgContLang;
 432                 return $this->mOptions->getInterfaceMessage() ? $wgLang : $wgContLang;
 433         }
 434
 435         /**
 436          * Replaces all occurrences of HTML-style comments and the given tags
 437          * in the text with a random marker and returns teh next text. The output
 438          * parameter $matches will be an associative array filled with data in
 439          * the form:
 440          *   'UNIQ-xxxxx' => array(
 441          *     'element',
 442          *     'tag content',
 443          *     array( 'param' => 'x' ),
 444          *     '<element param="x">tag content</element>' ) )
 445          *
 446          * @param $elements list of element names. Comments are always extracted.
 447          * @param $text Source text string.
 448          * @param $uniq_prefix
 449          *
 450          * @private
 451          * @static
 452          */
 453         function extractTagsAndParams($elements, $text, &$matches, $uniq_prefix = ''){
 454                 static $n = 1;
 455                 $stripped = '';
 456                 $matches = array();
 457
 458                 $taglist = implode( '|', $elements );
 459                 $start = "/<($taglist)(\\s+[^>]*?|\\s*?)(\/?>)|<(!--)/i";
 460
 461                 while ( '' != $text ) {
 462                         $p = preg_split( $start, $text, 2, PREG_SPLIT_DELIM_CAPTURE );
 463                         $stripped .= $p[0];
 464                         if( count( $p ) < 5 ) {
 465                                 break;
 466                         }
 467                         if( count( $p ) > 5 ) {
 468                                 // comment
 469                                 $element    = $p[4];
 470                                 $attributes = '';
 471                                 $close      = '';
 472                                 $inside     = $p[5];
 473                         } else {
 474                                 // tag
 475                                 $element    = $p[1];
 476                                 $attributes = $p[2];
 477                                 $close      = $p[3];
 478                                 $inside     = $p[4];
 479                         }
 480
 481                         $marker = "$uniq_prefix-$element-" . sprintf('%08X', $n++) . '-QINU';
 482                         $stripped .= $marker;
 483
 484                         if ( $close === '/>' ) {
 485                                 // Empty element tag, <tag />
 486                                 $content = null;
 487                                 $text = $inside;
 488                                 $tail = null;
 489                         } else {
 490                                 if( $element == '!--' ) {
 491                                         $end = '/(-->)/';
 492                                 } else {
 493                                         $end = "/(<\\/$element\\s*>)/i";
 494                                 }
 495                                 $q = preg_split( $end, $inside, 2, PREG_SPLIT_DELIM_CAPTURE );
 496                                 $content = $q[0];
 497                                 if( count( $q ) < 3 ) {
 498                                         # No end tag -- let it run out to the end of the text.
 499                                         $tail = '';
 500                                         $text = '';
 501                                 } else {
 502                                         $tail = $q[1];
 503                                         $text = $q[2];
 504                                 }
 505                         }
 506
 507                         $matches[$marker] = array( $element,
 508                                 $content,
 509                                 Sanitizer::decodeTagAttributes( $attributes ),
 510                                 "<$element$attributes$close$content$tail" );
 511                 }
 512                 return $stripped;
 513         }
 514
 515         /**
 516          * Strips and renders nowiki, pre, math, hiero
 517          * If $render is set, performs necessary rendering operations on plugins
 518          * Returns the text, and fills an array with data needed in unstrip()
 519          * If the $state is already a valid strip state, it adds to the state
 520          *
 521          * @param bool $stripcomments when set, HTML comments <!-- like this -->
 522          *  will be stripped in addition to other tags. This is important
 523          *  for section editing, where these comments cause confusion when
 524          *  counting the sections in the wikisource
 525          *
 526          * @param array dontstrip contains tags which should not be stripped;
 527          *  used to prevent stipping of <gallery> when saving (fixes bug 2700)
 528          *
 529          * @private
 530          */
 531         function strip( $text, &$state, $stripcomments = false , $dontstrip = array () ) {
 532                 wfProfileIn( __METHOD__ );
 533                 $render = ($this->mOutputType == OT_HTML);
 534
 535                 $uniq_prefix = $this->mUniqPrefix;
 536                 $commentState = array();
 537
 538                 $elements = array_merge(
 539                         array( 'nowiki', 'gallery' ),
 540                         array_keys( $this->mTagHooks ) );
 541                 global $wgRawHtml;
 542                 if( $wgRawHtml ) {
 543                         $elements[] = 'html';
 544                 }
 545                 if( $this->mOptions->getUseTeX() ) {
 546                         $elements[] = 'math';
 547                 }
 548
 549                 # Removing $dontstrip tags from $elements list (currently only 'gallery', fixing bug 2700)
 550                 foreach ( $elements AS $k => $v ) {
 551                         if ( !in_array ( $v , $dontstrip ) ) continue;
 552                         unset ( $elements[$k] );
 553                 }
 554
 555                 $matches = array();
 556                 $text = Parser::extractTagsAndParams( $elements, $text, $matches, $uniq_prefix );
 557
 558                 foreach( $matches as $marker => $data ) {
 559                         list( $element, $content, $params, $tag ) = $data;
 560                         if( $render ) {
 561                                 $tagName = strtolower( $element );
 562                                 wfProfileIn( __METHOD__."-render-$tagName" );
 563                                 switch( $tagName ) {
 564                                 case '!--':
 565                                         // Comment
 566                                         if( substr( $tag, -3 ) == '-->' ) {
 567                                                 $output = $tag;
 568                                         } else {
 569                                                 // Unclosed comment in input.
 570                                                 // Close it so later stripping can remove it
 571                                                 $output = "$tag-->";
 572                                         }
 573                                         break;
 574                                 case 'html':
 575                                         if( $wgRawHtml ) {
 576                                                 $output = $content;
 577                                                 break;
 578                                         }
 579                                         // Shouldn't happen otherwise. :)
 580                                 case 'nowiki':
 581                                         $output = wfEscapeHTMLTagsOnly( $content );
 582                                         break;
 583                                 case 'math':
 584                                         $output = MathRenderer::renderMath( $content );
 585                                         break;
 586                                 case 'gallery':
 587                                         $output = $this->renderImageGallery( $content, $params );
 588                                         break;
 589                                 default:
 590                                         if( isset( $this->mTagHooks[$tagName] ) ) {
 591                                                 $output = call_user_func_array( $this->mTagHooks[$tagName],
 592                                                         array( $content, $params, $this ) );
 593                                         } else {
 594                                                 throw new MWException( "Invalid call hook $element" );
 595                                         }
 596                                 }
 597                                 wfProfileOut( __METHOD__."-render-$tagName" );
 598                         } else {
 599                                 // Just stripping tags; keep the source
 600                                 $output = $tag;
 601                         }
 602
 603                         // Unstrip the output, because unstrip() is no longer recursive so
 604                         // it won't do it itself
 605                         $output = $this->unstrip( $output, $state );
 606
 607                         if( !$stripcomments && $element == '!--' ) {
 608                                 $commentState[$marker] = $output;
 609                         } elseif ( $element == 'html' || $element == 'nowiki' ) {
 610                                 $state['nowiki'][$marker] = $output;
 611                         } else {
 612                                 $state['general'][$marker] = $output;
 613                         }
 614                 }
 615
 616                 # Unstrip comments unless explicitly told otherwise.
 617                 # (The comments are always stripped prior to this point, so as to
 618                 # not invoke any extension tags / parser hooks contained within
 619                 # a comment.)
 620                 if ( !$stripcomments ) {
 621                         // Put them all back and forget them
 622                         $text = strtr( $text, $commentState );
 623                 }
 624
 625                 wfProfileOut( __METHOD__ );
 626                 return $text;
 627         }
 628
 629         /**
 630          * Restores pre, math, and other extensions removed by strip()
 631          *
 632          * always call unstripNoWiki() after this one
 633          * @private
 634          */
 635         function unstrip( $text, &$state ) {
 636                 if ( !isset( $state['general'] ) ) {
 637                         return $text;
 638                 }
 639
 640                 wfProfileIn( __METHOD__ );
 641                 # TODO: good candidate for FSS
 642                 $text = strtr( $text, $state['general'] );
 643                 wfProfileOut( __METHOD__ );
 644                 return $text;
 645         }
 646
 647         /**
 648          * Always call this after unstrip() to preserve the order
 649          *
 650          * @private
 651          */
 652         function unstripNoWiki( $text, &$state ) {
 653                 if ( !isset( $state['nowiki'] ) ) {
 654                         return $text;
 655                 }
 656
 657                 wfProfileIn( __METHOD__ );
 658                 # TODO: good candidate for FSS
 659                 $text = strtr( $text, $state['nowiki'] );
 660                 wfProfileOut( __METHOD__ );
 661
 662                 return $text;
 663         }
 664
 665         /**
 666          * Add an item to the strip state
 667          * Returns the unique tag which must be inserted into the stripped text
 668          * The tag will be replaced with the original text in unstrip()
 669          *
 670          * @private
 671          */
 672         function insertStripItem( $text, &$state ) {
 673                 $rnd = $this->mUniqPrefix . '-item' . Parser::getRandomString();
 674                 if ( !$state ) {
 675                         $state = array();
 676                 }
 677                 $state['general'][$rnd] = $text;
 678                 return $rnd;
 679         }
 680
 681         /**
 682          * Interface with html tidy, used if $wgUseTidy = true.
 683          * If tidy isn't able to correct the markup, the original will be
 684          * returned in all its glory with a warning comment appended.
 685          *
 686          * Either the external tidy program or the in-process tidy extension
 687          * will be used depending on availability. Override the default
 688          * $wgTidyInternal setting to disable the internal if it's not working.
 689          *
 690          * @param string $text Hideous HTML input
 691          * @return string Corrected HTML output
 692          * @public
 693          * @static
 694          */
 695         function tidy( $text ) {
 696                 global $wgTidyInternal;
 697                 $wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"'.
 698 ' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>'.
 699 '<head><title>test</title></head><body>'.$text.'</body></html>';
 700                 if( $wgTidyInternal ) {
 701                         $correctedtext = Parser::internalTidy( $wrappedtext );
 702                 } else {
 703                         $correctedtext = Parser::externalTidy( $wrappedtext );
 704                 }
 705                 if( is_null( $correctedtext ) ) {
 706                         wfDebug( "Tidy error detected!\n" );
 707                         return $text . "\n<!-- Tidy found serious XHTML errors -->\n";
 708                 }
 709                 return $correctedtext;
 710         }
 711
 712         /**
 713          * Spawn an external HTML tidy process and get corrected markup back from it.
 714          *
 715          * @private
 716          * @static
 717          */
 718         function externalTidy( $text ) {
 719                 global $wgTidyConf, $wgTidyBin, $wgTidyOpts;
 720                 $fname = 'Parser::externalTidy';
 721                 wfProfileIn( $fname );
 722
 723                 $cleansource = '';
 724                 $opts = ' -utf8';
 725
 726                 $descriptorspec = array(
 727                         0 => array('pipe', 'r'),
 728                         1 => array('pipe', 'w'),
 729                         2 => array('file', '/dev/null', 'a')
 730                 );
 731                 $pipes = array();
 732                 $process = proc_open("$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes);
 733                 if (is_resource($process)) {
 734                         // Theoretically, this style of communication could cause a deadlock
 735                         // here. If the stdout buffer fills up, then writes to stdin could
 736                         // block. This doesn't appear to happen with tidy, because tidy only
 737                         // writes to stdout after it's finished reading from stdin. Search
 738                         // for tidyParseStdin and tidySaveStdout in console/tidy.c
 739                         fwrite($pipes[0], $text);
 740                         fclose($pipes[0]);
 741                         while (!feof($pipes[1])) {
 742                                 $cleansource .= fgets($pipes[1], 1024);
 743                         }
 744                         fclose($pipes[1]);
 745                         proc_close($process);
 746                 }
 747
 748                 wfProfileOut( $fname );
 749
 750                 if( $cleansource == '' && $text != '') {
 751                         // Some kind of error happened, so we couldn't get the corrected text.
 752                         // Just give up; we'll use the source text and append a warning.
 753                         return null;
 754                 } else {
 755                         return $cleansource;
 756                 }
 757         }
 758
 759         /**
 760          * Use the HTML tidy PECL extension to use the tidy library in-process,
 761          * saving the overhead of spawning a new process. Currently written to
 762          * the PHP 4.3.x version of the extension, may not work on PHP 5.
 763          *
 764          * 'pear install tidy' should be able to compile the extension module.
 765          *
 766          * @private
 767          * @static
 768          */
 769         function internalTidy( $text ) {
 770                 global $wgTidyConf;
 771                 $fname = 'Parser::internalTidy';
 772                 wfProfileIn( $fname );
 773
 774                 tidy_load_config( $wgTidyConf );
 775                 tidy_set_encoding( 'utf8' );
 776                 tidy_parse_string( $text );
 777                 tidy_clean_repair();
 778                 if( tidy_get_status() == 2 ) {
 779                         // 2 is magic number for fatal error
 780                         // http://www.php.net/manual/en/function.tidy-get-status.php
 781                         $cleansource = null;
 782                 } else {
 783                         $cleansource = tidy_get_output();
 784                 }
 785                 wfProfileOut( $fname );
 786                 return $cleansource;
 787         }
 788
 789         /**
 790          * parse the wiki syntax used to render tables
 791          *
 792          * @private
 793          */
 794         function doTableStuff ( $t ) {
 795                 $fname = 'Parser::doTableStuff';
 796                 wfProfileIn( $fname );
 797
 798                 $t = explode ( "\n" , $t ) ;
 799                 $td = array () ; # Is currently a td tag open?
 800                 $ltd = array () ; # Was it TD or TH?
 801                 $tr = array () ; # Is currently a tr tag open?
 802                 $ltr = array () ; # tr attributes
 803                 $has_opened_tr = array(); # Did this table open a <tr> element?
 804                 $indent_level = 0; # indent level of the table
 805                 foreach ( $t AS $k => $x )
 806                 {
 807                         $x = trim ( $x ) ;
 808                         $fc = substr ( $x , 0 , 1 ) ;
 809                         if ( preg_match( '/^(:*)\{\|(.*)$/', $x, $matches ) ) {
 810                                 $indent_level = strlen( $matches[1] );
 811
 812                                 $attributes = $this->unstripForHTML( $matches[2] );
 813
 814                                 $t[$k] = str_repeat( '<dl><dd>', $indent_level ) .
 815                                         '<table' . Sanitizer::fixTagAttributes ( $attributes, 'table' ) . '>' ;
 816                                 array_push ( $td , false ) ;
 817                                 array_push ( $ltd , '' ) ;
 818                                 array_push ( $tr , false ) ;
 819                                 array_push ( $ltr , '' ) ;
 820                                 array_push ( $has_opened_tr, false );
 821                         }
 822                         else if ( count ( $td ) == 0 ) { } # Don't do any of the following
 823                         else if ( '|}' == substr ( $x , 0 , 2 ) ) {
 824                                 $z = "</table>" . substr ( $x , 2);
 825                                 $l = array_pop ( $ltd ) ;
 826                                 if ( !array_pop ( $has_opened_tr ) ) $z = "<tr><td></td></tr>" . $z ;
 827                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 828                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 829                                 array_pop ( $ltr ) ;
 830                                 $t[$k] = $z . str_repeat( '</dd></dl>', $indent_level );
 831                         }
 832                         else if ( '|-' == substr ( $x , 0 , 2 ) ) { # Allows for |---------------
 833                                 $x = substr ( $x , 1 ) ;
 834                                 while ( $x != '' && substr ( $x , 0 , 1 ) == '-' ) $x = substr ( $x , 1 ) ;
 835                                 $z = '' ;
 836                                 $l = array_pop ( $ltd ) ;
 837                                 array_pop ( $has_opened_tr );
 838                                 array_push ( $has_opened_tr , true ) ;
 839                                 if ( array_pop ( $tr ) ) $z = '</tr>' . $z ;
 840                                 if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 841                                 array_pop ( $ltr ) ;
 842                                 $t[$k] = $z ;
 843                                 array_push ( $tr , false ) ;
 844                                 array_push ( $td , false ) ;
 845                                 array_push ( $ltd , '' ) ;
 846                                 $attributes = $this->unstripForHTML( $x );
 847                                 array_push ( $ltr , Sanitizer::fixTagAttributes ( $attributes, 'tr' ) ) ;
 848                         }
 849                         else if ( '|' == $fc || '!' == $fc || '|+' == substr ( $x , 0 , 2 ) ) { # Caption
 850                                 # $x is a table row
 851                                 if ( '|+' == substr ( $x , 0 , 2 ) ) {
 852                                         $fc = '+' ;
 853                                         $x = substr ( $x , 1 ) ;
 854                                 }
 855                                 $after = substr ( $x , 1 ) ;
 856                                 if ( $fc == '!' ) $after = str_replace ( '!!' , '||' , $after ) ;
 857
 858                                 // Split up multiple cells on the same line.
 859                                 // FIXME: This can result in improper nesting of tags processed
 860                                 // by earlier parser steps, but should avoid splitting up eg
 861                                 // attribute values containing literal "||".
 862                                 $after = wfExplodeMarkup( '||', $after );
 863
 864                                 $t[$k] = '' ;
 865
 866                                 # Loop through each table cell
 867                                 foreach ( $after AS $theline )
 868                                 {
 869                                         $z = '' ;
 870                                         if ( $fc != '+' )
 871                                         {
 872                                                 $tra = array_pop ( $ltr ) ;
 873                                                 if ( !array_pop ( $tr ) ) $z = '<tr'.$tra.">\n" ;
 874                                                 array_push ( $tr , true ) ;
 875                                                 array_push ( $ltr , '' ) ;
 876                                                 array_pop ( $has_opened_tr );
 877                                                 array_push ( $has_opened_tr , true ) ;
 878                                         }
 879
 880                                         $l = array_pop ( $ltd ) ;
 881                                         if ( array_pop ( $td ) ) $z = '</'.$l.'>' . $z ;
 882                                         if ( $fc == '|' ) $l = 'td' ;
 883                                         else if ( $fc == '!' ) $l = 'th' ;
 884                                         else if ( $fc == '+' ) $l = 'caption' ;
 885                                         else $l = '' ;
 886                                         array_push ( $ltd , $l ) ;
 887
 888                                         # Cell parameters
 889                                         $y = explode ( '|' , $theline , 2 ) ;
 890                                         # Note that a '|' inside an invalid link should not
 891                                         # be mistaken as delimiting cell parameters
 892                                         if ( strpos( $y[0], '[[' ) !== false ) {
 893                                                 $y = array ($theline);
 894                                         }
 895                                         if ( count ( $y ) == 1 )
 896                                                 $y = "{$z}<{$l}>{$y[0]}" ;
 897                                         else {
 898                                                 $attributes = $this->unstripForHTML( $y[0] );
 899                                                 $y = "{$z}<{$l}".Sanitizer::fixTagAttributes($attributes, $l).">{$y[1]}" ;
 900                                         }
 901                                         $t[$k] .= $y ;
 902                                         array_push ( $td , true ) ;
 903                                 }
 904                         }
 905                 }
 906
 907                 # Closing open td, tr && table
 908                 while ( count ( $td ) > 0 )
 909                 {
 910                         $l = array_pop ( $ltd ) ;
 911                         if ( array_pop ( $td ) ) $t[] = '</td>' ;
 912                         if ( array_pop ( $tr ) ) $t[] = '</tr>' ;
 913                         if ( !array_pop ( $has_opened_tr ) ) $t[] = "<tr><td></td></tr>" ;
 914                         $t[] = '</table>' ;
 915                 }
 916
 917                 $t = implode ( "\n" , $t ) ;
 918                 # special case: don't return empty table
 919                 if($t == "<table>\n<tr><td></td></tr>\n</table>")
 920                         $t = '';
 921                 wfProfileOut( $fname );
 922                 return $t ;
 923         }
 924
 925         /**
 926          * Helper function for parse() that transforms wiki markup into
 927          * HTML. Only called for $mOutputType == OT_HTML.
 928          *
 929          * @private
 930          */
 931         function internalParse( $text ) {
 932                 $args = array();
 933                 $isMain = true;
 934                 $fname = 'Parser::internalParse';
 935                 wfProfileIn( $fname );
 936
 937                 # Hook to suspend the parser in this state
 938                 if ( !wfRunHooks( 'ParserBeforeInternalParse', array( &$this, &$text, &$x ) ) ) {
 939                         wfProfileOut( $fname );
 940                         return $text ;
 941                 }
 942
 943                 # Remove <noinclude> tags and <includeonly> sections
 944                 $text = strtr( $text, array( '<onlyinclude>' => '' , '</onlyinclude>' => '' ) );
 945                 $text = strtr( $text, array( '<noinclude>' => '', '</noinclude>' => '') );
 946                 $text = preg_replace( '/<includeonly>.*?<\/includeonly>/s', '', $text );
 947
 948                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'attributeStripCallback' ) );
 949
 950                 $text = $this->replaceVariables( $text, $args );
 951
 952                 // Tables need to come after variable replacement for things to work
 953                 // properly; putting them before other transformations should keep
 954                 // exciting things like link expansions from showing up in surprising
 955                 // places.
 956                 $text = $this->doTableStuff( $text );
 957
 958                 $text = preg_replace( '/(^|\n)-----*/', '\\1<hr />', $text );
 959
 960                 $text = $this->stripToc( $text );
 961                 $this->stripNoGallery( $text );
 962                 $text = $this->doHeadings( $text );
 963                 if($this->mOptions->getUseDynamicDates()) {
 964                         $df =& DateFormatter::getInstance();
 965                         $text = $df->reformat( $this->mOptions->getDateFormat(), $text );
 966                 }
 967                 $text = $this->doAllQuotes( $text );
 968                 $text = $this->replaceInternalLinks( $text );
 969                 $text = $this->replaceExternalLinks( $text );
 970
 971                 # replaceInternalLinks may sometimes leave behind
 972                 # absolute URLs, which have to be masked to hide them from replaceExternalLinks
 973                 $text = str_replace($this->mUniqPrefix."NOPARSE", "", $text);
 974
 975                 $text = $this->doMagicLinks( $text );
 976                 $text = $this->formatHeadings( $text, $isMain );
 977
 978                 wfProfileOut( $fname );
 979                 return $text;
 980         }
 981
 982         /**
 983          * Replace special strings like "ISBN xxx" and "RFC xxx" with
 984          * magic external links.
 985          *
 986          * @private
 987          */
 988         function &doMagicLinks( &$text ) {
 989                 wfProfileIn( __METHOD__ );
 990                 $text = preg_replace_callback(
 991                         '!(?:                           # Start cases
 992                             <a.*?</a> |                 # Skip link text
 993                             <.*?> |                     # Skip stuff inside HTML elements
 994                             (?:RFC|PMID)\s+([0-9]+) |   # RFC or PMID, capture number as m[1]
 995                             ISBN\s+([0-9Xx-]+)          # ISBN, capture number as m[2]
 996                         )!x', array( &$this, 'magicLinkCallback' ), $text );
 997                 wfProfileOut( __METHOD__ );
 998                 return $text;
 999         }
1000
1001         function magicLinkCallback( $m ) {
1002                 if ( substr( $m[0], 0, 1 ) == '<' ) {
1003                         # Skip HTML element
1004                         return $m[0];
1005                 } elseif ( substr( $m[0], 0, 4 ) == 'ISBN' ) {
1006                         $isbn = $m[2];
1007                         $num = strtr( $isbn, array(
1008                                 '-' => '',
1009                                 ' ' => '',
1010                                 'x' => 'X',
1011                         ));
1012                         $titleObj = Title::makeTitle( NS_SPECIAL, 'Booksources' );
1013                         $text = '<a href="' .
1014                                 $titleObj->escapeLocalUrl( "isbn=$num" ) .
1015                                 "\" class=\"internal\">ISBN $isbn</a>";
1016                 } else {
1017                         if ( substr( $m[0], 0, 3 ) == 'RFC' ) {
1018                                 $keyword = 'RFC';
1019                                 $urlmsg = 'rfcurl';
1020                                 $id = $m[1];
1021                         } elseif ( substr( $m[0], 0, 4 ) == 'PMID' ) {
1022                                 $keyword = 'PMID';
1023                                 $urlmsg = 'pubmedurl';
1024                                 $id = $m[1];
1025                         } else {
1026                                 throw new MWException( __METHOD__.': unrecognised match type "' .
1027                                         substr($m[0], 0, 20 ) . '"' );
1028                         }
1029
1030                         $url = wfMsg( $urlmsg, $id);
1031                         $sk =& $this->mOptions->getSkin();
1032                         $la = $sk->getExternalLinkAttributes( $url, $keyword.$id );
1033                         $text = "<a href=\"{$url}\"{$la}>{$keyword} {$id}</a>";
1034                 }
1035                 return $text;
1036         }
1037
1038         /**
1039          * Parse headers and return html
1040          *
1041          * @private
1042          */
1043         function doHeadings( $text ) {
1044                 $fname = 'Parser::doHeadings';
1045                 wfProfileIn( $fname );
1046                 for ( $i = 6; $i >= 1; --$i ) {
1047                         $h = str_repeat( '=', $i );
1048                         $text = preg_replace( "/^{$h}(.+){$h}\\s*$/m",
1049                           "<h{$i}>\\1</h{$i}>\\2", $text );
1050                 }
1051                 wfProfileOut( $fname );
1052                 return $text;
1053         }
1054
1055         /**
1056          * Replace single quotes with HTML markup
1057          * @private
1058          * @return string the altered text
1059          */
1060         function doAllQuotes( $text ) {
1061                 $fname = 'Parser::doAllQuotes';
1062                 wfProfileIn( $fname );
1063                 $outtext = '';
1064                 $lines = explode( "\n", $text );
1065                 foreach ( $lines as $line ) {
1066                         $outtext .= $this->doQuotes ( $line ) . "\n";
1067                 }
1068                 $outtext = substr($outtext, 0,-1);
1069                 wfProfileOut( $fname );
1070                 return $outtext;
1071         }
1072
1073         /**
1074          * Helper function for doAllQuotes()
1075          * @private
1076          */
1077         function doQuotes( $text ) {
1078                 $arr = preg_split( "/(''+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1079                 if ( count( $arr ) == 1 )
1080                         return $text;
1081                 else
1082                 {
1083                         # First, do some preliminary work. This may shift some apostrophes from
1084                         # being mark-up to being text. It also counts the number of occurrences
1085                         # of bold and italics mark-ups.
1086                         $i = 0;
1087                         $numbold = 0;
1088                         $numitalics = 0;
1089                         foreach ( $arr as $r )
1090                         {
1091                                 if ( ( $i % 2 ) == 1 )
1092                                 {
1093                                         # If there are ever four apostrophes, assume the first is supposed to
1094                                         # be text, and the remaining three constitute mark-up for bold text.
1095                                         if ( strlen( $arr[$i] ) == 4 )
1096                                         {
1097                                                 $arr[$i-1] .= "'";
1098                                                 $arr[$i] = "'''";
1099                                         }
1100                                         # If there are more than 5 apostrophes in a row, assume they're all
1101                                         # text except for the last 5.
1102                                         else if ( strlen( $arr[$i] ) > 5 )
1103                                         {
1104                                                 $arr[$i-1] .= str_repeat( "'", strlen( $arr[$i] ) - 5 );
1105                                                 $arr[$i] = "'''''";
1106                                         }
1107                                         # Count the number of occurrences of bold and italics mark-ups.
1108                                         # We are not counting sequences of five apostrophes.
1109                                         if ( strlen( $arr[$i] ) == 2 ) $numitalics++;  else
1110                                         if ( strlen( $arr[$i] ) == 3 ) $numbold++;     else
1111                                         if ( strlen( $arr[$i] ) == 5 ) { $numitalics++; $numbold++; }
1112                                 }
1113                                 $i++;
1114                         }
1115
1116                         # If there is an odd number of both bold and italics, it is likely
1117                         # that one of the bold ones was meant to be an apostrophe followed
1118                         # by italics. Which one we cannot know for certain, but it is more
1119                         # likely to be one that has a single-letter word before it.
1120                         if ( ( $numbold % 2 == 1 ) && ( $numitalics % 2 == 1 ) )
1121                         {
1122                                 $i = 0;
1123                                 $firstsingleletterword = -1;
1124                                 $firstmultiletterword = -1;
1125                                 $firstspace = -1;
1126                                 foreach ( $arr as $r )
1127                                 {
1128                                         if ( ( $i % 2 == 1 ) and ( strlen( $r ) == 3 ) )
1129                                         {
1130                                                 $x1 = substr ($arr[$i-1], -1);
1131                                                 $x2 = substr ($arr[$i-1], -2, 1);
1132                                                 if ($x1 == ' ') {
1133                                                         if ($firstspace == -1) $firstspace = $i;
1134                                                 } else if ($x2 == ' ') {
1135                                                         if ($firstsingleletterword == -1) $firstsingleletterword = $i;
1136                                                 } else {
1137                                                         if ($firstmultiletterword == -1) $firstmultiletterword = $i;
1138                                                 }
1139                                         }
1140                                         $i++;
1141                                 }
1142
1143                                 # If there is a single-letter word, use it!
1144                                 if ($firstsingleletterword > -1)
1145                                 {
1146                                         $arr [ $firstsingleletterword ] = "''";
1147                                         $arr [ $firstsingleletterword-1 ] .= "'";
1148                                 }
1149                                 # If not, but there's a multi-letter word, use that one.
1150                                 else if ($firstmultiletterword > -1)
1151                                 {
1152                                         $arr [ $firstmultiletterword ] = "''";
1153                                         $arr [ $firstmultiletterword-1 ] .= "'";
1154                                 }
1155                                 # ... otherwise use the first one that has neither.
1156                                 # (notice that it is possible for all three to be -1 if, for example,
1157                                 # there is only one pentuple-apostrophe in the line)
1158                                 else if ($firstspace > -1)
1159                                 {
1160                                         $arr [ $firstspace ] = "''";
1161                                         $arr [ $firstspace-1 ] .= "'";
1162                                 }
1163                         }
1164
1165                         # Now let's actually convert our apostrophic mush to HTML!
1166                         $output = '';
1167                         $buffer = '';
1168                         $state = '';
1169                         $i = 0;
1170                         foreach ($arr as $r)
1171                         {
1172                                 if (($i % 2) == 0)
1173                                 {
1174                                         if ($state == 'both')
1175                                                 $buffer .= $r;
1176                                         else
1177                                                 $output .= $r;
1178                                 }
1179                                 else
1180                                 {
1181                                         if (strlen ($r) == 2)
1182                                         {
1183                                                 if ($state == 'i')
1184                                                 { $output .= '</i>'; $state = ''; }
1185                                                 else if ($state == 'bi')
1186                                                 { $output .= '</i>'; $state = 'b'; }
1187                                                 else if ($state == 'ib')
1188                                                 { $output .= '</b></i><b>'; $state = 'b'; }
1189                                                 else if ($state == 'both')
1190                                                 { $output .= '<b><i>'.$buffer.'</i>'; $state = 'b'; }
1191                                                 else # $state can be 'b' or ''
1192                                                 { $output .= '<i>'; $state .= 'i'; }
1193                                         }
1194                                         else if (strlen ($r) == 3)
1195                                         {
1196                                                 if ($state == 'b')
1197                                                 { $output .= '</b>'; $state = ''; }
1198                                                 else if ($state == 'bi')
1199                                                 { $output .= '</i></b><i>'; $state = 'i'; }
1200                                                 else if ($state == 'ib')
1201                                                 { $output .= '</b>'; $state = 'i'; }
1202                                                 else if ($state == 'both')
1203                                                 { $output .= '<i><b>'.$buffer.'</b>'; $state = 'i'; }
1204                                                 else # $state can be 'i' or ''
1205                                                 { $output .= '<b>'; $state .= 'b'; }
1206                                         }
1207                                         else if (strlen ($r) == 5)
1208                                         {
1209                                                 if ($state == 'b')
1210                                                 { $output .= '</b><i>'; $state = 'i'; }
1211                                                 else if ($state == 'i')
1212                                                 { $output .= '</i><b>'; $state = 'b'; }
1213                                                 else if ($state == 'bi')
1214                                                 { $output .= '</i></b>'; $state = ''; }
1215                                                 else if ($state == 'ib')
1216                                                 { $output .= '</b></i>'; $state = ''; }
1217                                                 else if ($state == 'both')
1218                                                 { $output .= '<i><b>'.$buffer.'</b></i>'; $state = ''; }
1219                                                 else # ($state == '')
1220                                                 { $buffer = ''; $state = 'both'; }
1221                                         }
1222                                 }
1223                                 $i++;
1224                         }
1225                         # Now close all remaining tags.  Notice that the order is important.
1226                         if ($state == 'b' || $state == 'ib')
1227                                 $output .= '</b>';
1228                         if ($state == 'i' || $state == 'bi' || $state == 'ib')
1229                                 $output .= '</i>';
1230                         if ($state == 'bi')
1231                                 $output .= '</b>';
1232                         if ($state == 'both')
1233                                 $output .= '<b><i>'.$buffer.'</i></b>';
1234                         return $output;
1235                 }
1236         }
1237
1238         /**
1239          * Replace external links
1240          *
1241          * Note: this is all very hackish and the order of execution matters a lot.
1242          * Make sure to run maintenance/parserTests.php if you change this code.
1243          *
1244          * @private
1245          */
1246         function replaceExternalLinks( $text ) {
1247                 global $wgContLang;
1248                 $fname = 'Parser::replaceExternalLinks';
1249                 wfProfileIn( $fname );
1250
1251                 $sk =& $this->mOptions->getSkin();
1252
1253                 $bits = preg_split( EXT_LINK_BRACKETED, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1254
1255                 $s = $this->replaceFreeExternalLinks( array_shift( $bits ) );
1256
1257                 $i = 0;
1258                 while ( $i<count( $bits ) ) {
1259                         $url = $bits[$i++];
1260                         $protocol = $bits[$i++];
1261                         $text = $bits[$i++];
1262                         $trail = $bits[$i++];
1263
1264                         # The characters '<' and '>' (which were escaped by
1265                         # removeHTMLtags()) should not be included in
1266                         # URLs, per RFC 2396.
1267                         if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1268                                 $text = substr($url, $m2[0][1]) . ' ' . $text;
1269                                 $url = substr($url, 0, $m2[0][1]);
1270                         }
1271
1272                         # If the link text is an image URL, replace it with an <img> tag
1273                         # This happened by accident in the original parser, but some people used it extensively
1274                         $img = $this->maybeMakeExternalImage( $text );
1275                         if ( $img !== false ) {
1276                                 $text = $img;
1277                         }
1278
1279                         $dtrail = '';
1280
1281                         # Set linktype for CSS - if URL==text, link is essentially free
1282                         $linktype = ($text == $url) ? 'free' : 'text';
1283
1284                         # No link text, e.g. [http://domain.tld/some.link]
1285                         if ( $text == '' ) {
1286                                 # Autonumber if allowed. See bug #5918
1287                                 if ( strpos( wfUrlProtocols(), substr($protocol, 0, strpos($protocol, ':')) ) !== false ) {
1288                                         $text = '[' . ++$this->mAutonumber . ']';
1289                                         $linktype = 'autonumber';
1290                                 } else {
1291                                         # Otherwise just use the URL
1292                                         $text = htmlspecialchars( $url );
1293                                         $linktype = 'free';
1294                                 }
1295                         } else {
1296                                 # Have link text, e.g. [http://domain.tld/some.link text]s
1297                                 # Check for trail
1298                                 list( $dtrail, $trail ) = Linker::splitTrail( $trail );
1299                         }
1300
1301                         $text = $wgContLang->markNoConversion($text);
1302
1303                         $url = Sanitizer::cleanUrl( $url );
1304
1305                         # Process the trail (i.e. everything after this link up until start of the next link),
1306                         # replacing any non-bracketed links
1307                         $trail = $this->replaceFreeExternalLinks( $trail );
1308
1309                         # Use the encoded URL
1310                         # This means that users can paste URLs directly into the text
1311                         # Funny characters like &ouml; aren't valid in URLs anyway
1312                         # This was changed in August 2004
1313                         $s .= $sk->makeExternalLink( $url, $text, false, $linktype, $this->mTitle->getNamespace() ) . $dtrail . $trail;
1314
1315                         # Register link in the output object.
1316                         # Replace unnecessary URL escape codes with the referenced character
1317                         # This prevents spammers from hiding links from the filters
1318                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1319                         $this->mOutput->addExternalLink( $pasteurized );
1320                 }
1321
1322                 wfProfileOut( $fname );
1323                 return $s;
1324         }
1325
1326         /**
1327          * Replace anything that looks like a URL with a link
1328          * @private
1329          */
1330         function replaceFreeExternalLinks( $text ) {
1331                 global $wgContLang;
1332                 $fname = 'Parser::replaceFreeExternalLinks';
1333                 wfProfileIn( $fname );
1334
1335                 $bits = preg_split( '/(\b(?:' . wfUrlProtocols() . '))/S', $text, -1, PREG_SPLIT_DELIM_CAPTURE );
1336                 $s = array_shift( $bits );
1337                 $i = 0;
1338
1339                 $sk =& $this->mOptions->getSkin();
1340
1341                 while ( $i < count( $bits ) ){
1342                         $protocol = $bits[$i++];
1343                         $remainder = $bits[$i++];
1344
1345                         if ( preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $remainder, $m ) ) {
1346                                 # Found some characters after the protocol that look promising
1347                                 $url = $protocol . $m[1];
1348                                 $trail = $m[2];
1349
1350                                 # special case: handle urls as url args:
1351                                 # http://www.example.com/foo?=http://www.example.com/bar
1352                                 if(strlen($trail) == 0 &&
1353                                         isset($bits[$i]) &&
1354                                         preg_match('/^'. wfUrlProtocols() . '$/S', $bits[$i]) &&
1355                                         preg_match( '/^('.EXT_LINK_URL_CLASS.'+)(.*)$/s', $bits[$i + 1], $m ))
1356                                 {
1357                                         # add protocol, arg
1358                                         $url .= $bits[$i] . $m[1]; # protocol, url as arg to previous link
1359                                         $i += 2;
1360                                         $trail = $m[2];
1361                                 }
1362
1363                                 # The characters '<' and '>' (which were escaped by
1364                                 # removeHTMLtags()) should not be included in
1365                                 # URLs, per RFC 2396.
1366                                 if (preg_match('/&(lt|gt);/', $url, $m2, PREG_OFFSET_CAPTURE)) {
1367                                         $trail = substr($url, $m2[0][1]) . $trail;
1368                                         $url = substr($url, 0, $m2[0][1]);
1369                                 }
1370
1371                                 # Move trailing punctuation to $trail
1372                                 $sep = ',;\.:!?';
1373                                 # If there is no left bracket, then consider right brackets fair game too
1374                                 if ( strpos( $url, '(' ) === false ) {
1375                                         $sep .= ')';
1376                                 }
1377
1378                                 $numSepChars = strspn( strrev( $url ), $sep );
1379                                 if ( $numSepChars ) {
1380                                         $trail = substr( $url, -$numSepChars ) . $trail;
1381                                         $url = substr( $url, 0, -$numSepChars );
1382                                 }
1383
1384                                 $url = Sanitizer::cleanUrl( $url );
1385
1386                                 # Is this an external image?
1387                                 $text = $this->maybeMakeExternalImage( $url );
1388                                 if ( $text === false ) {
1389                                         # Not an image, make a link
1390                                         $text = $sk->makeExternalLink( $url, $wgContLang->markNoConversion($url), true, 'free', $this->mTitle->getNamespace() );
1391                                         # Register it in the output object...
1392                                         # Replace unnecessary URL escape codes with their equivalent characters
1393                                         $pasteurized = Parser::replaceUnusualEscapes( $url );
1394                                         $this->mOutput->addExternalLink( $pasteurized );
1395                                 }
1396                                 $s .= $text . $trail;
1397                         } else {
1398                                 $s .= $protocol . $remainder;
1399                         }
1400                 }
1401                 wfProfileOut( $fname );
1402                 return $s;
1403         }
1404
1405         /**
1406          * Replace unusual URL escape codes with their equivalent characters
1407          * @param string
1408          * @return string
1409          * @static
1410          * @fixme This can merge genuinely required bits in the path or query string,
1411          *        breaking legit URLs. A proper fix would treat the various parts of
1412          *        the URL differently; as a workaround, just use the output for
1413          *        statistical records, not for actual linking/output.
1414          */
1415         static function replaceUnusualEscapes( $url ) {
1416                 return preg_replace_callback( '/%[0-9A-Fa-f]{2}/',
1417                         array( 'Parser', 'replaceUnusualEscapesCallback' ), $url );
1418         }
1419
1420         /**
1421          * Callback function used in replaceUnusualEscapes().
1422          * Replaces unusual URL escape codes with their equivalent character
1423          * @static
1424          * @private
1425          */
1426         private static function replaceUnusualEscapesCallback( $matches ) {
1427                 $char = urldecode( $matches[0] );
1428                 $ord = ord( $char );
1429                 // Is it an unsafe or HTTP reserved character according to RFC 1738?
1430                 if ( $ord > 32 && $ord < 127 && strpos( '<>"#{}|\^~[]`;/?', $char ) === false ) {
1431                         // No, shouldn't be escaped
1432                         return $char;
1433                 } else {
1434                         // Yes, leave it escaped
1435                         return $matches[0];
1436                 }
1437         }
1438
1439         /**
1440          * make an image if it's allowed, either through the global
1441          * option or through the exception
1442          * @private
1443          */
1444         function maybeMakeExternalImage( $url ) {
1445                 $sk =& $this->mOptions->getSkin();
1446                 $imagesfrom = $this->mOptions->getAllowExternalImagesFrom();
1447                 $imagesexception = !empty($imagesfrom);
1448                 $text = false;
1449                 if ( $this->mOptions->getAllowExternalImages()
1450                      || ( $imagesexception && strpos( $url, $imagesfrom ) === 0 ) ) {
1451                         if ( preg_match( EXT_IMAGE_REGEX, $url ) ) {
1452                                 # Image found
1453                                 $text = $sk->makeExternalImage( htmlspecialchars( $url ) );
1454                         }
1455                 }
1456                 return $text;
1457         }
1458
1459         /**
1460          * Process [[ ]] wikilinks
1461          *
1462          * @private
1463          */
1464         function replaceInternalLinks( $s ) {
1465                 global $wgContLang;
1466                 static $fname = 'Parser::replaceInternalLinks' ;
1467
1468                 wfProfileIn( $fname );
1469
1470                 wfProfileIn( $fname.'-setup' );
1471                 static $tc = FALSE;
1472                 # the % is needed to support urlencoded titles as well
1473                 if ( !$tc ) { $tc = Title::legalChars() . '#%'; }
1474
1475                 $sk =& $this->mOptions->getSkin();
1476
1477                 #split the entire text string on occurences of [[
1478                 $a = explode( '[[', ' ' . $s );
1479                 #get the first element (all text up to first [[), and remove the space we added
1480                 $s = array_shift( $a );
1481                 $s = substr( $s, 1 );
1482
1483                 # Match a link having the form [[namespace:link|alternate]]trail
1484                 static $e1 = FALSE;
1485                 if ( !$e1 ) { $e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD"; }
1486                 # Match cases where there is no "]]", which might still be images
1487                 static $e1_img = FALSE;
1488                 if ( !$e1_img ) { $e1_img = "/^([{$tc}]+)\\|(.*)\$/sD"; }
1489                 # Match the end of a line for a word that's not followed by whitespace,
1490                 # e.g. in the case of 'The Arab al[[Razi]]', 'al' will be matched
1491                 $e2 = wfMsgForContent( 'linkprefix' );
1492
1493                 $useLinkPrefixExtension = $wgContLang->linkPrefixExtension();
1494
1495                 if( is_null( $this->mTitle ) ) {
1496                         throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
1497                 }
1498                 $nottalk = !$this->mTitle->isTalkPage();
1499
1500                 if ( $useLinkPrefixExtension ) {
1501                         if ( preg_match( $e2, $s, $m ) ) {
1502                                 $first_prefix = $m[2];
1503                         } else {
1504                                 $first_prefix = false;
1505                         }
1506                 } else {
1507                         $prefix = '';
1508                 }
1509
1510                 $selflink = $this->mTitle->getPrefixedText();
1511                 $useSubpages = $this->areSubpagesAllowed();
1512                 wfProfileOut( $fname.'-setup' );
1513
1514                 # Loop for each link
1515                 for ($k = 0; isset( $a[$k] ); $k++) {
1516                         $line = $a[$k];
1517                         if ( $useLinkPrefixExtension ) {
1518                                 wfProfileIn( $fname.'-prefixhandling' );
1519                                 if ( preg_match( $e2, $s, $m ) ) {
1520                                         $prefix = $m[2];
1521                                         $s = $m[1];
1522                                 } else {
1523                                         $prefix='';
1524                                 }
1525                                 # first link
1526                                 if($first_prefix) {
1527                                         $prefix = $first_prefix;
1528                                         $first_prefix = false;
1529                                 }
1530                                 wfProfileOut( $fname.'-prefixhandling' );
1531                         }
1532
1533                         $might_be_img = false;
1534
1535                         wfProfileIn( "$fname-e1" );
1536                         if ( preg_match( $e1, $line, $m ) ) { # page with normal text or alt
1537                                 $text = $m[2];
1538                                 # If we get a ] at the beginning of $m[3] that means we have a link that's something like:
1539                                 # [[Image:Foo.jpg|[http://example.com desc]]] <- having three ] in a row fucks up,
1540                                 # the real problem is with the $e1 regex
1541                                 # See bug 1300.
1542                                 #
1543                                 # Still some problems for cases where the ] is meant to be outside punctuation,
1544                                 # and no image is in sight. See bug 2095.
1545                                 #
1546                                 if( $text !== '' &&
1547                                         substr( $m[3], 0, 1 ) === ']' &&
1548                                         strpos($text, '[') !== false
1549                                 )
1550                                 {
1551                                         $text .= ']'; # so that replaceExternalLinks($text) works later
1552                                         $m[3] = substr( $m[3], 1 );
1553                                 }
1554                                 # fix up urlencoded title texts
1555                                 if( strpos( $m[1], '%' ) !== false ) {
1556                                         # Should anchors '#' also be rejected?
1557                                         $m[1] = str_replace( array('<', '>'), array('&lt;', '&gt;'), urldecode($m[1]) );
1558                                 }
1559                                 $trail = $m[3];
1560                         } elseif( preg_match($e1_img, $line, $m) ) { # Invalid, but might be an image with a link in its caption
1561                                 $might_be_img = true;
1562                                 $text = $m[2];
1563                                 if ( strpos( $m[1], '%' ) !== false ) {
1564                                        $m[1] = urldecode($m[1]);
1565                                 }
1566                                 $trail = "";
1567                         } else { # Invalid form; output directly
1568                                 $s .= $prefix . '[[' . $line ;
1569                                 wfProfileOut( "$fname-e1" );
1570                                 continue;
1571                         }
1572                         wfProfileOut( "$fname-e1" );
1573                         wfProfileIn( "$fname-misc" );
1574
1575                         # Don't allow internal links to pages containing
1576                         # PROTO: where PROTO is a valid URL protocol; these
1577                         # should be external links.
1578                         if (preg_match('/^(\b(?:' . wfUrlProtocols() . '))/', $m[1])) {
1579                                 $s .= $prefix . '[[' . $line ;
1580                                 continue;
1581                         }
1582
1583                         # Make subpage if necessary
1584                         if( $useSubpages ) {
1585                                 $link = $this->maybeDoSubpageLink( $m[1], $text );
1586                         } else {
1587                                 $link = $m[1];
1588                         }
1589
1590                         $noforce = (substr($m[1], 0, 1) != ':');
1591                         if (!$noforce) {
1592                                 # Strip off leading ':'
1593                                 $link = substr($link, 1);
1594                         }
1595
1596                         wfProfileOut( "$fname-misc" );
1597                         wfProfileIn( "$fname-title" );
1598                         $nt = Title::newFromText( $this->unstripNoWiki($link, $this->mStripState) );
1599                         if( !$nt ) {
1600                                 $s .= $prefix . '[[' . $line;
1601                                 wfProfileOut( "$fname-title" );
1602                                 continue;
1603                         }
1604
1605                         $ns = $nt->getNamespace();
1606                         $iw = $nt->getInterWiki();
1607                         wfProfileOut( "$fname-title" );
1608
1609                         if ($might_be_img) { # if this is actually an invalid link
1610                                 wfProfileIn( "$fname-might_be_img" );
1611                                 if ($ns == NS_IMAGE && $noforce) { #but might be an image
1612                                         $found = false;
1613                                         while (isset ($a[$k+1]) ) {
1614                                                 #look at the next 'line' to see if we can close it there
1615                                                 $spliced = array_splice( $a, $k + 1, 1 );
1616                                                 $next_line = array_shift( $spliced );
1617                                                 $m = explode( ']]', $next_line, 3 );
1618                                                 if ( count( $m ) == 3 ) {
1619                                                         # the first ]] closes the inner link, the second the image
1620                                                         $found = true;
1621                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1622                                                         $trail = $m[2];
1623                                                         break;
1624                                                 } elseif ( count( $m ) == 2 ) {
1625                                                         #if there's exactly one ]] that's fine, we'll keep looking
1626                                                         $text .= "[[{$m[0]}]]{$m[1]}";
1627                                                 } else {
1628                                                         #if $next_line is invalid too, we need look no further
1629                                                         $text .= '[[' . $next_line;
1630                                                         break;
1631                                                 }
1632                                         }
1633                                         if ( !$found ) {
1634                                                 # we couldn't find the end of this imageLink, so output it raw
1635                                                 #but don't ignore what might be perfectly normal links in the text we've examined
1636                                                 $text = $this->replaceInternalLinks($text);
1637                                                 $s .= "{$prefix}[[$link|$text";
1638                                                 # note: no $trail, because without an end, there *is* no trail
1639                                                 wfProfileOut( "$fname-might_be_img" );
1640                                                 continue;
1641                                         }
1642                                 } else { #it's not an image, so output it raw
1643                                         $s .= "{$prefix}[[$link|$text";
1644                                         # note: no $trail, because without an end, there *is* no trail
1645                                         wfProfileOut( "$fname-might_be_img" );
1646                                         continue;
1647                                 }
1648                                 wfProfileOut( "$fname-might_be_img" );
1649                         }
1650
1651                         $wasblank = ( '' == $text );
1652                         if( $wasblank ) $text = $link;
1653
1654                         # Link not escaped by : , create the various objects
1655                         if( $noforce ) {
1656
1657                                 # Interwikis
1658                                 wfProfileIn( "$fname-interwiki" );
1659                                 if( $iw && $this->mOptions->getInterwikiMagic() && $nottalk && $wgContLang->getLanguageName( $iw ) ) {
1660                                         $this->mOutput->addLanguageLink( $nt->getFullText() );
1661                                         $s = rtrim($s . "\n");
1662                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1663                                         wfProfileOut( "$fname-interwiki" );
1664                                         continue;
1665                                 }
1666                                 wfProfileOut( "$fname-interwiki" );
1667
1668                                 if ( $ns == NS_IMAGE ) {
1669                                         wfProfileIn( "$fname-image" );
1670                                         if ( !wfIsBadImage( $nt->getDBkey(), $this->mTitle ) ) {
1671                                                 # recursively parse links inside the image caption
1672                                                 # actually, this will parse them in any other parameters, too,
1673                                                 # but it might be hard to fix that, and it doesn't matter ATM
1674                                                 $text = $this->replaceExternalLinks($text);
1675                                                 $text = $this->replaceInternalLinks($text);
1676
1677                                                 # cloak any absolute URLs inside the image markup, so replaceExternalLinks() won't touch them
1678                                                 $s .= $prefix . $this->armorLinks( $this->makeImage( $nt, $text ) ) . $trail;
1679                                                 $this->mOutput->addImage( $nt->getDBkey() );
1680
1681                                                 wfProfileOut( "$fname-image" );
1682                                                 continue;
1683                                         } else {
1684                                                 # We still need to record the image's presence on the page
1685                                                 $this->mOutput->addImage( $nt->getDBkey() );
1686                                         }
1687                                         wfProfileOut( "$fname-image" );
1688
1689                                 }
1690
1691                                 if ( $ns == NS_CATEGORY ) {
1692                                         wfProfileIn( "$fname-category" );
1693                                         $s = rtrim($s . "\n"); # bug 87
1694
1695                                         if ( $wasblank ) {
1696                                                 if ( $this->mTitle->getNamespace() == NS_CATEGORY ) {
1697                                                         $sortkey = $this->mTitle->getText();
1698                                                 } else {
1699                                                         $sortkey = $this->mTitle->getPrefixedText();
1700                                                 }
1701                                         } else {
1702                                                 $sortkey = $text;
1703                                         }
1704                                         $sortkey = Sanitizer::decodeCharReferences( $sortkey );
1705                                         $sortkey = str_replace( "\n", '', $sortkey );
1706                                         $sortkey = $wgContLang->convertCategoryKey( $sortkey );
1707                                         $this->mOutput->addCategory( $nt->getDBkey(), $sortkey );
1708
1709                                         /**
1710                                          * Strip the whitespace Category links produce, see bug 87
1711                                          * @todo We might want to use trim($tmp, "\n") here.
1712                                          */
1713                                         $s .= trim($prefix . $trail, "\n") == '' ? '': $prefix . $trail;
1714
1715                                         wfProfileOut( "$fname-category" );
1716                                         continue;
1717                                 }
1718                         }
1719
1720                         if( ( $nt->getPrefixedText() === $selflink ) &&
1721                             ( $nt->getFragment() === '' ) ) {
1722                                 # Self-links are handled specially; generally de-link and change to bold.
1723                                 $s .= $prefix . $sk->makeSelfLinkObj( $nt, $text, '', $trail );
1724                                 continue;
1725                         }
1726
1727                         # Special and Media are pseudo-namespaces; no pages actually exist in them
1728                         if( $ns == NS_MEDIA ) {
1729                                 $link = $sk->makeMediaLinkObj( $nt, $text );
1730                                 # Cloak with NOPARSE to avoid replacement in replaceExternalLinks
1731                                 $s .= $prefix . $this->armorLinks( $link ) . $trail;
1732                                 $this->mOutput->addImage( $nt->getDBkey() );
1733                                 continue;
1734                         } elseif( $ns == NS_SPECIAL ) {
1735                                 $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1736                                 continue;
1737                         } elseif( $ns == NS_IMAGE ) {
1738                                 $img = new Image( $nt );
1739                                 if( $img->exists() ) {
1740                                         // Force a blue link if the file exists; may be a remote
1741                                         // upload on the shared repository, and we want to see its
1742                                         // auto-generated page.
1743                                         $s .= $this->makeKnownLinkHolder( $nt, $text, '', $trail, $prefix );
1744                                         $this->mOutput->addLink( $nt );
1745                                         continue;
1746                                 }
1747                         }
1748                         $s .= $this->makeLinkHolder( $nt, $text, '', $trail, $prefix );
1749                 }
1750                 wfProfileOut( $fname );
1751                 return $s;
1752         }
1753
1754         /**
1755          * Make a link placeholder. The text returned can be later resolved to a real link with
1756          * replaceLinkHolders(). This is done for two reasons: firstly to avoid further
1757          * parsing of interwiki links, and secondly to allow all existence checks and
1758          * article length checks (for stub links) to be bundled into a single query.
1759          *
1760          */
1761         function makeLinkHolder( &$nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1762                 wfProfileIn( __METHOD__ );
1763                 if ( ! is_object($nt) ) {
1764                         # Fail gracefully
1765                         $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}";
1766                 } else {
1767                         # Separate the link trail from the rest of the link
1768                         list( $inside, $trail ) = Linker::splitTrail( $trail );
1769
1770                         if ( $nt->isExternal() ) {
1771                                 $nr = array_push( $this->mInterwikiLinkHolders['texts'], $prefix.$text.$inside );
1772                                 $this->mInterwikiLinkHolders['titles'][] = $nt;
1773                                 $retVal = '<!--IWLINK '. ($nr-1) ."-->{$trail}";
1774                         } else {
1775                                 $nr = array_push( $this->mLinkHolders['namespaces'], $nt->getNamespace() );
1776                                 $this->mLinkHolders['dbkeys'][] = $nt->getDBkey();
1777                                 $this->mLinkHolders['queries'][] = $query;
1778                                 $this->mLinkHolders['texts'][] = $prefix.$text.$inside;
1779                                 $this->mLinkHolders['titles'][] = $nt;
1780
1781                                 $retVal = '<!--LINK '. ($nr-1) ."-->{$trail}";
1782                         }
1783                 }
1784                 wfProfileOut( __METHOD__ );
1785                 return $retVal;
1786         }
1787
1788         /**
1789          * Render a forced-blue link inline; protect against double expansion of
1790          * URLs if we're in a mode that prepends full URL prefixes to internal links.
1791          * Since this little disaster has to split off the trail text to avoid
1792          * breaking URLs in the following text without breaking trails on the
1793          * wiki links, it's been made into a horrible function.
1794          *
1795          * @param Title $nt
1796          * @param string $text
1797          * @param string $query
1798          * @param string $trail
1799          * @param string $prefix
1800          * @return string HTML-wikitext mix oh yuck
1801          */
1802         function makeKnownLinkHolder( $nt, $text = '', $query = '', $trail = '', $prefix = '' ) {
1803                 list( $inside, $trail ) = Linker::splitTrail( $trail );
1804                 $sk =& $this->mOptions->getSkin();
1805                 $link = $sk->makeKnownLinkObj( $nt, $text, $query, $inside, $prefix );
1806                 return $this->armorLinks( $link ) . $trail;
1807         }
1808
1809         /**
1810          * Insert a NOPARSE hacky thing into any inline links in a chunk that's
1811          * going to go through further parsing steps before inline URL expansion.
1812          *
1813          * In particular this is important when using action=render, which causes
1814          * full URLs to be included.
1815          *
1816          * Oh man I hate our multi-layer parser!
1817          *
1818          * @param string more-or-less HTML
1819          * @return string less-or-more HTML with NOPARSE bits
1820          */
1821         function armorLinks( $text ) {
1822                 return preg_replace( "/\b(" . wfUrlProtocols() . ')/',
1823                         "{$this->mUniqPrefix}NOPARSE$1", $text );
1824         }
1825
1826         /**
1827          * Return true if subpage links should be expanded on this page.
1828          * @return bool
1829          */
1830         function areSubpagesAllowed() {
1831                 # Some namespaces don't allow subpages
1832                 global $wgNamespacesWithSubpages;
1833                 return !empty($wgNamespacesWithSubpages[$this->mTitle->getNamespace()]);
1834         }
1835
1836         /**
1837          * Handle link to subpage if necessary
1838          * @param string $target the source of the link
1839          * @param string &$text the link text, modified as necessary
1840          * @return string the full name of the link
1841          * @private
1842          */
1843         function maybeDoSubpageLink($target, &$text) {
1844                 # Valid link forms:
1845                 # Foobar -- normal
1846                 # :Foobar -- override special treatment of prefix (images, language links)
1847                 # /Foobar -- convert to CurrentPage/Foobar
1848                 # /Foobar/ -- convert to CurrentPage/Foobar, strip the initial / from text
1849                 # ../ -- convert to CurrentPage, from CurrentPage/CurrentSubPage
1850                 # ../Foobar -- convert to CurrentPage/Foobar, from CurrentPage/CurrentSubPage
1851
1852                 $fname = 'Parser::maybeDoSubpageLink';
1853                 wfProfileIn( $fname );
1854                 $ret = $target; # default return value is no change
1855
1856                 # bug 7425
1857                 $target = trim( $target );
1858
1859                 # Some namespaces don't allow subpages,
1860                 # so only perform processing if subpages are allowed
1861                 if( $this->areSubpagesAllowed() ) {
1862                         # Look at the first character
1863                         if( $target != '' && $target{0} == '/' ) {
1864                                 # / at end means we don't want the slash to be shown
1865                                 if( substr( $target, -1, 1 ) == '/' ) {
1866                                         $target = substr( $target, 1, -1 );
1867                                         $noslash = $target;
1868                                 } else {
1869                                         $noslash = substr( $target, 1 );
1870                                 }
1871
1872                                 $ret = $this->mTitle->getPrefixedText(). '/' . trim($noslash);
1873                                 if( '' === $text ) {
1874                                         $text = $target;
1875                                 } # this might be changed for ugliness reasons
1876                         } else {
1877                                 # check for .. subpage backlinks
1878                                 $dotdotcount = 0;
1879                                 $nodotdot = $target;
1880                                 while( strncmp( $nodotdot, "../", 3 ) == 0 ) {
1881                                         ++$dotdotcount;
1882                                         $nodotdot = substr( $nodotdot, 3 );
1883                                 }
1884                                 if($dotdotcount > 0) {
1885                                         $exploded = explode( '/', $this->mTitle->GetPrefixedText() );
1886                                         if( count( $exploded ) > $dotdotcount ) { # not allowed to go below top level page
1887                                                 $ret = implode( '/', array_slice( $exploded, 0, -$dotdotcount ) );
1888                                                 # / at the end means don't show full path
1889                                                 if( substr( $nodotdot, -1, 1 ) == '/' ) {
1890                                                         $nodotdot = substr( $nodotdot, 0, -1 );
1891                                                         if( '' === $text ) {
1892                                                                 $text = $nodotdot;
1893                                                         }
1894                                                 }
1895                                                 $nodotdot = trim( $nodotdot );
1896                                                 if( $nodotdot != '' ) {
1897                                                         $ret .= '/' . $nodotdot;
1898                                                 }
1899                                         }
1900                                 }
1901                         }
1902                 }
1903
1904                 wfProfileOut( $fname );
1905                 return $ret;
1906         }
1907
1908         /**#@+
1909          * Used by doBlockLevels()
1910          * @private
1911          */
1912         /* private */ function closeParagraph() {
1913                 $result = '';
1914                 if ( '' != $this->mLastSection ) {
1915                         $result = '</' . $this->mLastSection  . ">\n";
1916                 }
1917                 $this->mInPre = false;
1918                 $this->mLastSection = '';
1919                 return $result;
1920         }
1921         # getCommon() returns the length of the longest common substring
1922         # of both arguments, starting at the beginning of both.
1923         #
1924         /* private */ function getCommon( $st1, $st2 ) {
1925                 $fl = strlen( $st1 );
1926                 $shorter = strlen( $st2 );
1927                 if ( $fl < $shorter ) { $shorter = $fl; }
1928
1929                 for ( $i = 0; $i < $shorter; ++$i ) {
1930                         if ( $st1{$i} != $st2{$i} ) { break; }
1931                 }
1932                 return $i;
1933         }
1934         # These next three functions open, continue, and close the list
1935         # element appropriate to the prefix character passed into them.
1936         #
1937         /* private */ function openList( $char ) {
1938                 $result = $this->closeParagraph();
1939
1940                 if ( '*' == $char ) { $result .= '<ul><li>'; }
1941                 else if ( '#' == $char ) { $result .= '<ol><li>'; }
1942                 else if ( ':' == $char ) { $result .= '<dl><dd>'; }
1943                 else if ( ';' == $char ) {
1944                         $result .= '<dl><dt>';
1945                         $this->mDTopen = true;
1946                 }
1947                 else { $result = '<!-- ERR 1 -->'; }
1948
1949                 return $result;
1950         }
1951
1952         /* private */ function nextItem( $char ) {
1953                 if ( '*' == $char || '#' == $char ) { return '</li><li>'; }
1954                 else if ( ':' == $char || ';' == $char ) {
1955                         $close = '</dd>';
1956                         if ( $this->mDTopen ) { $close = '</dt>'; }
1957                         if ( ';' == $char ) {
1958                                 $this->mDTopen = true;
1959                                 return $close . '<dt>';
1960                         } else {
1961                                 $this->mDTopen = false;
1962                                 return $close . '<dd>';
1963                         }
1964                 }
1965                 return '<!-- ERR 2 -->';
1966         }
1967
1968         /* private */ function closeList( $char ) {
1969                 if ( '*' == $char ) { $text = '</li></ul>'; }
1970                 else if ( '#' == $char ) { $text = '</li></ol>'; }
1971                 else if ( ':' == $char ) {
1972                         if ( $this->mDTopen ) {
1973                                 $this->mDTopen = false;
1974                                 $text = '</dt></dl>';
1975                         } else {
1976                                 $text = '</dd></dl>';
1977                         }
1978                 }
1979                 else {  return '<!-- ERR 3 -->'; }
1980                 return $text."\n";
1981         }
1982         /**#@-*/
1983
1984         /**
1985          * Make lists from lines starting with ':', '*', '#', etc.
1986          *
1987          * @private
1988          * @return string the lists rendered as HTML
1989          */
1990         function doBlockLevels( $text, $linestart ) {
1991                 $fname = 'Parser::doBlockLevels';
1992                 wfProfileIn( $fname );
1993
1994                 # Parsing through the text line by line.  The main thing
1995                 # happening here is handling of block-level elements p, pre,
1996                 # and making lists from lines starting with * # : etc.
1997                 #
1998                 $textLines = explode( "\n", $text );
1999
2000                 $lastPrefix = $output = '';
2001                 $this->mDTopen = $inBlockElem = false;
2002                 $prefixLength = 0;
2003                 $paragraphStack = false;
2004
2005                 if ( !$linestart ) {
2006                         $output .= array_shift( $textLines );
2007                 }
2008                 foreach ( $textLines as $oLine ) {
2009                         $lastPrefixLength = strlen( $lastPrefix );
2010                         $preCloseMatch = preg_match('/<\\/pre/i', $oLine );
2011                         $preOpenMatch = preg_match('/<pre/i', $oLine );
2012                         if ( !$this->mInPre ) {
2013                                 # Multiple prefixes may abut each other for nested lists.
2014                                 $prefixLength = strspn( $oLine, '*#:;' );
2015                                 $pref = substr( $oLine, 0, $prefixLength );
2016
2017                                 # eh?
2018                                 $pref2 = str_replace( ';', ':', $pref );
2019                                 $t = substr( $oLine, $prefixLength );
2020                                 $this->mInPre = !empty($preOpenMatch);
2021                         } else {
2022                                 # Don't interpret any other prefixes in preformatted text
2023                                 $prefixLength = 0;
2024                                 $pref = $pref2 = '';
2025                                 $t = $oLine;
2026                         }
2027
2028                         # List generation
2029                         if( $prefixLength && 0 == strcmp( $lastPrefix, $pref2 ) ) {
2030                                 # Same as the last item, so no need to deal with nesting or opening stuff
2031                                 $output .= $this->nextItem( substr( $pref, -1 ) );
2032                                 $paragraphStack = false;
2033
2034                                 if ( substr( $pref, -1 ) == ';') {
2035                                         # The one nasty exception: definition lists work like this:
2036                                         # ; title : definition text
2037                                         # So we check for : in the remainder text to split up the
2038                                         # title and definition, without b0rking links.
2039                                         $term = $t2 = '';
2040                                         if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2041                                                 $t = $t2;
2042                                                 $output .= $term . $this->nextItem( ':' );
2043                                         }
2044                                 }
2045                         } elseif( $prefixLength || $lastPrefixLength ) {
2046                                 # Either open or close a level...
2047                                 $commonPrefixLength = $this->getCommon( $pref, $lastPrefix );
2048                                 $paragraphStack = false;
2049
2050                                 while( $commonPrefixLength < $lastPrefixLength ) {
2051                                         $output .= $this->closeList( $lastPrefix{$lastPrefixLength-1} );
2052                                         --$lastPrefixLength;
2053                                 }
2054                                 if ( $prefixLength <= $commonPrefixLength && $commonPrefixLength > 0 ) {
2055                                         $output .= $this->nextItem( $pref{$commonPrefixLength-1} );
2056                                 }
2057                                 while ( $prefixLength > $commonPrefixLength ) {
2058                                         $char = substr( $pref, $commonPrefixLength, 1 );
2059                                         $output .= $this->openList( $char );
2060
2061                                         if ( ';' == $char ) {
2062                                                 # FIXME: This is dupe of code above
2063                                                 if ($this->findColonNoLinks($t, $term, $t2) !== false) {
2064                                                         $t = $t2;
2065                                                         $output .= $term . $this->nextItem( ':' );
2066                                                 }
2067                                         }
2068                                         ++$commonPrefixLength;
2069                                 }
2070                                 $lastPrefix = $pref2;
2071                         }
2072                         if( 0 == $prefixLength ) {
2073                                 wfProfileIn( "$fname-paragraph" );
2074                                 # No prefix (not in list)--go to paragraph mode
2075                                 // XXX: use a stack for nestable elements like span, table and div
2076                                 $openmatch = preg_match('/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6|<pre|<tr|<p|<ul|<ol|<li|<\\/center|<\\/tr|<\\/td|<\\/th)/iS', $t );
2077                                 $closematch = preg_match(
2078                                         '/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6|'.
2079                                         '<td|<th|<div|<\\/div|<hr|<\\/pre|<\\/p|'.$this->mUniqPrefix.'-pre|<\\/li|<\\/ul|<\\/ol|<center)/iS', $t );
2080                                 if ( $openmatch or $closematch ) {
2081                                         $paragraphStack = false;
2082                                         # TODO bug 5718: paragraph closed
2083                                         $output .= $this->closeParagraph();
2084                                         if ( $preOpenMatch and !$preCloseMatch ) {
2085                                                 $this->mInPre = true;
2086                                         }
2087                                         if ( $closematch ) {
2088                                                 $inBlockElem = false;
2089                                         } else {
2090                                                 $inBlockElem = true;
2091                                         }
2092                                 } else if ( !$inBlockElem && !$this->mInPre ) {
2093                                         if ( ' ' == $t{0} and ( $this->mLastSection == 'pre' or trim($t) != '' ) ) {
2094                                                 // pre
2095                                                 if ($this->mLastSection != 'pre') {
2096                                                         $paragraphStack = false;
2097                                                         $output .= $this->closeParagraph().'<pre>';
2098                                                         $this->mLastSection = 'pre';
2099                                                 }
2100                                                 $t = substr( $t, 1 );
2101                                         } else {
2102                                                 // paragraph
2103                                                 if ( '' == trim($t) ) {
2104                                                         if ( $paragraphStack ) {
2105                                                                 $output .= $paragraphStack.'<br />';
2106                                                                 $paragraphStack = false;
2107                                                                 $this->mLastSection = 'p';
2108                                                         } else {
2109                                                                 if ($this->mLastSection != 'p' ) {
2110                                                                         $output .= $this->closeParagraph();
2111                                                                         $this->mLastSection = '';
2112                                                                         $paragraphStack = '<p>';
2113                                                                 } else {
2114                                                                         $paragraphStack = '</p><p>';
2115                                                                 }
2116                                                         }
2117                                                 } else {
2118                                                         if ( $paragraphStack ) {
2119                                                                 $output .= $paragraphStack;
2120                                                                 $paragraphStack = false;
2121                                                                 $this->mLastSection = 'p';
2122                                                         } else if ($this->mLastSection != 'p') {
2123                                                                 $output .= $this->closeParagraph().'<p>';
2124                                                                 $this->mLastSection = 'p';
2125                                                         }
2126                                                 }
2127                                         }
2128                                 }
2129                                 wfProfileOut( "$fname-paragraph" );
2130                         }
2131                         // somewhere above we forget to get out of pre block (bug 785)
2132                         if($preCloseMatch && $this->mInPre) {
2133                                 $this->mInPre = false;
2134                         }
2135                         if ($paragraphStack === false) {
2136                                 $output .= $t."\n";
2137                         }
2138                 }
2139                 while ( $prefixLength ) {
2140                         $output .= $this->closeList( $pref2{$prefixLength-1} );
2141                         --$prefixLength;
2142                 }
2143                 if ( '' != $this->mLastSection ) {
2144                         $output .= '</' . $this->mLastSection . '>';
2145                         $this->mLastSection = '';
2146                 }
2147
2148                 wfProfileOut( $fname );
2149                 return $output;
2150         }
2151
2152         /**
2153          * Split up a string on ':', ignoring any occurences inside tags
2154          * to prevent illegal overlapping.
2155          * @param string $str the string to split
2156          * @param string &$before set to everything before the ':'
2157          * @param string &$after set to everything after the ':'
2158          * return string the position of the ':', or false if none found
2159          */
2160         function findColonNoLinks($str, &$before, &$after) {
2161                 $fname = 'Parser::findColonNoLinks';
2162                 wfProfileIn( $fname );
2163
2164                 $pos = strpos( $str, ':' );
2165                 if( $pos === false ) {
2166                         // Nothing to find!
2167                         wfProfileOut( $fname );
2168                         return false;
2169                 }
2170
2171                 $lt = strpos( $str, '<' );
2172                 if( $lt === false || $lt > $pos ) {
2173                         // Easy; no tag nesting to worry about
2174                         $before = substr( $str, 0, $pos );
2175                         $after = substr( $str, $pos+1 );
2176                         wfProfileOut( $fname );
2177                         return $pos;
2178                 }
2179
2180                 // Ugly state machine to walk through avoiding tags.
2181                 $state = MW_COLON_STATE_TEXT;
2182                 $stack = 0;
2183                 $len = strlen( $str );
2184                 for( $i = 0; $i < $len; $i++ ) {
2185                         $c = $str{$i};
2186
2187                         switch( $state ) {
2188                         // (Using the number is a performance hack for common cases)
2189                         case 0: // MW_COLON_STATE_TEXT:
2190                                 switch( $c ) {
2191                                 case "<":
2192                                         // Could be either a <start> tag or an </end> tag
2193                                         $state = MW_COLON_STATE_TAGSTART;
2194                                         break;
2195                                 case ":":
2196                                         if( $stack == 0 ) {
2197                                                 // We found it!
2198                                                 $before = substr( $str, 0, $i );
2199                                                 $after = substr( $str, $i + 1 );
2200                                                 wfProfileOut( $fname );
2201                                                 return $i;
2202                                         }
2203                                         // Embedded in a tag; don't break it.
2204                                         break;
2205                                 default:
2206                                         // Skip ahead looking for something interesting
2207                                         $colon = strpos( $str, ':', $i );
2208                                         if( $colon === false ) {
2209                                                 // Nothing else interesting
2210                                                 wfProfileOut( $fname );
2211                                                 return false;
2212                                         }
2213                                         $lt = strpos( $str, '<', $i );
2214                                         if( $stack === 0 ) {
2215                                                 if( $lt === false || $colon < $lt ) {
2216                                                         // We found it!
2217                                                         $before = substr( $str, 0, $colon );
2218                                                         $after = substr( $str, $colon + 1 );
2219                                                         wfProfileOut( $fname );
2220                                                         return $i;
2221                                                 }
2222                                         }
2223                                         if( $lt === false ) {
2224                                                 // Nothing else interesting to find; abort!
2225                                                 // We're nested, but there's no close tags left. Abort!
2226                                                 break 2;
2227                                         }
2228                                         // Skip ahead to next tag start
2229                                         $i = $lt;
2230                                         $state = MW_COLON_STATE_TAGSTART;
2231                                 }
2232                                 break;
2233                         case 1: // MW_COLON_STATE_TAG:
2234                                 // In a <tag>
2235                                 switch( $c ) {
2236                                 case ">":
2237                                         $stack++;
2238                                         $state = MW_COLON_STATE_TEXT;
2239                                         break;
2240                                 case "/":
2241                                         // Slash may be followed by >?
2242                                         $state = MW_COLON_STATE_TAGSLASH;
2243                                         break;
2244                                 default:
2245                                         // ignore
2246                                 }
2247                                 break;
2248                         case 2: // MW_COLON_STATE_TAGSTART:
2249                                 switch( $c ) {
2250                                 case "/":
2251                                         $state = MW_COLON_STATE_CLOSETAG;
2252                                         break;
2253                                 case "!":
2254                                         $state = MW_COLON_STATE_COMMENT;
2255                                         break;
2256                                 case ">":
2257                                         // Illegal early close? This shouldn't happen D:
2258                                         $state = MW_COLON_STATE_TEXT;
2259                                         break;
2260                                 default:
2261                                         $state = MW_COLON_STATE_TAG;
2262                                 }
2263                                 break;
2264                         case 3: // MW_COLON_STATE_CLOSETAG:
2265                                 // In a </tag>
2266                                 if( $c == ">" ) {
2267                                         $stack--;
2268                                         if( $stack < 0 ) {
2269                                                 wfDebug( "Invalid input in $fname; too many close tags\n" );
2270                                                 wfProfileOut( $fname );
2271                                                 return false;
2272                                         }
2273                                         $state = MW_COLON_STATE_TEXT;
2274                                 }
2275                                 break;
2276                         case MW_COLON_STATE_TAGSLASH:
2277                                 if( $c == ">" ) {
2278                                         // Yes, a self-closed tag <blah/>
2279                                         $state = MW_COLON_STATE_TEXT;
2280                                 } else {
2281                                         // Probably we're jumping the gun, and this is an attribute
2282                                         $state = MW_COLON_STATE_TAG;
2283                                 }
2284                                 break;
2285                         case 5: // MW_COLON_STATE_COMMENT:
2286                                 if( $c == "-" ) {
2287                                         $state = MW_COLON_STATE_COMMENTDASH;
2288                                 }
2289                                 break;
2290                         case MW_COLON_STATE_COMMENTDASH:
2291                                 if( $c == "-" ) {
2292                                         $state = MW_COLON_STATE_COMMENTDASHDASH;
2293                                 } else {
2294                                         $state = MW_COLON_STATE_COMMENT;
2295                                 }
2296                                 break;
2297                         case MW_COLON_STATE_COMMENTDASHDASH:
2298                                 if( $c == ">" ) {
2299                                         $state = MW_COLON_STATE_TEXT;
2300                                 } else {
2301                                         $state = MW_COLON_STATE_COMMENT;
2302                                 }
2303                                 break;
2304                         default:
2305                                 throw new MWException( "State machine error in $fname" );
2306                         }
2307                 }
2308                 if( $stack > 0 ) {
2309                         wfDebug( "Invalid input in $fname; not enough close tags (stack $stack, state $state)\n" );
2310                         return false;
2311                 }
2312                 wfProfileOut( $fname );
2313                 return false;
2314         }
2315
2316         /**
2317          * Return value of a magic variable (like PAGENAME)
2318          *
2319          * @private
2320          */
2321         function getVariableValue( $index ) {
2322                 global $wgContLang, $wgSitename, $wgServer, $wgServerName, $wgScriptPath;
2323
2324                 /**
2325                  * Some of these require message or data lookups and can be
2326                  * expensive to check many times.
2327                  */
2328                 static $varCache = array();
2329                 if ( wfRunHooks( 'ParserGetVariableValueVarCache', array( &$this, &$varCache ) ) )
2330                         if ( isset( $varCache[$index] ) )
2331                                 return $varCache[$index];
2332
2333                 $ts = time();
2334                 wfRunHooks( 'ParserGetVariableValueTs', array( &$this, &$ts ) );
2335
2336                 # Use the time zone
2337                 global $wgLocaltimezone;
2338                 if ( isset( $wgLocaltimezone ) ) {
2339                         $oldtz = getenv( 'TZ' );
2340                         putenv( 'TZ='.$wgLocaltimezone );
2341                 }
2342                 $localTimestamp = date( 'YmdHis', $ts );
2343                 $localMonth = date( 'm', $ts );
2344                 $localMonthName = date( 'n', $ts );
2345                 $localDay = date( 'j', $ts );
2346                 $localDay2 = date( 'd', $ts );
2347                 $localDayOfWeek = date( 'w', $ts );
2348                 $localWeek = date( 'W', $ts );
2349                 $localYear = date( 'Y', $ts );
2350                 $localHour = date( 'H', $ts );
2351                 if ( isset( $wgLocaltimezone ) ) {
2352                         putenv( 'TZ='.$oldtz );
2353                 }
2354
2355                 switch ( $index ) {
2356                         case 'currentmonth':
2357                                 return $varCache[$index] = $wgContLang->formatNum( date( 'm', $ts ) );
2358                         case 'currentmonthname':
2359                                 return $varCache[$index] = $wgContLang->getMonthName( date( 'n', $ts ) );
2360                         case 'currentmonthnamegen':
2361                                 return $varCache[$index] = $wgContLang->getMonthNameGen( date( 'n', $ts ) );
2362                         case 'currentmonthabbrev':
2363                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( date( 'n', $ts ) );
2364                         case 'currentday':
2365                                 return $varCache[$index] = $wgContLang->formatNum( date( 'j', $ts ) );
2366                         case 'currentday2':
2367                                 return $varCache[$index] = $wgContLang->formatNum( date( 'd', $ts ) );
2368                         case 'localmonth':
2369                                 return $varCache[$index] = $wgContLang->formatNum( $localMonth );
2370                         case 'localmonthname':
2371                                 return $varCache[$index] = $wgContLang->getMonthName( $localMonthName );
2372                         case 'localmonthnamegen':
2373                                 return $varCache[$index] = $wgContLang->getMonthNameGen( $localMonthName );
2374                         case 'localmonthabbrev':
2375                                 return $varCache[$index] = $wgContLang->getMonthAbbreviation( $localMonthName );
2376                         case 'localday':
2377                                 return $varCache[$index] = $wgContLang->formatNum( $localDay );
2378                         case 'localday2':
2379                                 return $varCache[$index] = $wgContLang->formatNum( $localDay2 );
2380                         case 'pagename':
2381                                 return $this->mTitle->getText();
2382                         case 'pagenamee':
2383                                 return $this->mTitle->getPartialURL();
2384                         case 'fullpagename':
2385                                 return $this->mTitle->getPrefixedText();
2386                         case 'fullpagenamee':
2387                                 return $this->mTitle->getPrefixedURL();
2388                         case 'subpagename':
2389                                 return $this->mTitle->getSubpageText();
2390                         case 'subpagenamee':
2391                                 return $this->mTitle->getSubpageUrlForm();
2392                         case 'basepagename':
2393                                 return $this->mTitle->getBaseText();
2394                         case 'basepagenamee':
2395                                 return wfUrlEncode( str_replace( ' ', '_', $this->mTitle->getBaseText() ) );
2396                         case 'talkpagename':
2397                                 if( $this->mTitle->canTalk() ) {
2398                                         $talkPage = $this->mTitle->getTalkPage();
2399                                         return $talkPage->getPrefixedText();
2400                                 } else {
2401                                         return '';
2402                                 }
2403                         case 'talkpagenamee':
2404                                 if( $this->mTitle->canTalk() ) {
2405                                         $talkPage = $this->mTitle->getTalkPage();
2406                                         return $talkPage->getPrefixedUrl();
2407                                 } else {
2408                                         return '';
2409                                 }
2410                         case 'subjectpagename':
2411                                 $subjPage = $this->mTitle->getSubjectPage();
2412                                 return $subjPage->getPrefixedText();
2413                         case 'subjectpagenamee':
2414                                 $subjPage = $this->mTitle->getSubjectPage();
2415                                 return $subjPage->getPrefixedUrl();
2416                         case 'revisionid':
2417                                 return $this->mRevisionId;
2418                         case 'revisionday':
2419                                 return intval( substr( wfRevisionTimestamp( $this->mRevisionId ), 6, 2 ) );
2420                         case 'revisionday2':
2421                                 return substr( wfRevisionTimestamp( $this->mRevisionId ), 6, 2 );
2422                         case 'revisionmonth':
2423                                 return intval( substr( wfRevisionTimestamp( $this->mRevisionId ), 4, 2 ) );
2424                         case 'revisionyear':
2425                                 return substr( wfRevisionTimestamp( $this->mRevisionId ), 0, 4 );
2426                         case 'revisiontimestamp':
2427                                 return wfRevisionTimestamp( $this->mRevisionId );
2428                         case 'namespace':
2429                                 return str_replace('_',' ',$wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2430                         case 'namespacee':
2431                                 return wfUrlencode( $wgContLang->getNsText( $this->mTitle->getNamespace() ) );
2432                         case 'talkspace':
2433                                 return $this->mTitle->canTalk() ? str_replace('_',' ',$this->mTitle->getTalkNsText()) : '';
2434                         case 'talkspacee':
2435                                 return $this->mTitle->canTalk() ? wfUrlencode( $this->mTitle->getTalkNsText() ) : '';
2436                         case 'subjectspace':
2437                                 return $this->mTitle->getSubjectNsText();
2438                         case 'subjectspacee':
2439                                 return( wfUrlencode( $this->mTitle->getSubjectNsText() ) );
2440                         case 'currentdayname':
2441                                 return $varCache[$index] = $wgContLang->getWeekdayName( date( 'w', $ts ) + 1 );
2442                         case 'currentyear':
2443                                 return $varCache[$index] = $wgContLang->formatNum( date( 'Y', $ts ), true );
2444                         case 'currenttime':
2445                                 return $varCache[$index] = $wgContLang->time( wfTimestamp( TS_MW, $ts ), false, false );
2446                         case 'currenthour':
2447                                 return $varCache[$index] = $wgContLang->formatNum( date( 'H', $ts ), true );
2448                         case 'currentweek':
2449                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2450                                 // int to remove the padding
2451                                 return $varCache[$index] = $wgContLang->formatNum( (int)date( 'W', $ts ) );
2452                         case 'currentdow':
2453                                 return $varCache[$index] = $wgContLang->formatNum( date( 'w', $ts ) );
2454                         case 'localdayname':
2455                                 return $varCache[$index] = $wgContLang->getWeekdayName( $localDayOfWeek + 1 );
2456                         case 'localyear':
2457                                 return $varCache[$index] = $wgContLang->formatNum( $localYear, true );
2458                         case 'localtime':
2459                                 return $varCache[$index] = $wgContLang->time( $localTimestamp, false, false );
2460                         case 'localhour':
2461                                 return $varCache[$index] = $wgContLang->formatNum( $localHour, true );
2462                         case 'localweek':
2463                                 // @bug 4594 PHP5 has it zero padded, PHP4 does not, cast to
2464                                 // int to remove the padding
2465                                 return $varCache[$index] = $wgContLang->formatNum( (int)$localWeek );
2466                         case 'localdow':
2467                                 return $varCache[$index] = $wgContLang->formatNum( $localDayOfWeek );
2468                         case 'numberofarticles':
2469                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfArticles() );
2470                         case 'numberoffiles':
2471                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfFiles() );
2472                         case 'numberofusers':
2473                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfUsers() );
2474                         case 'numberofpages':
2475                                 return $varCache[$index] = $wgContLang->formatNum( wfNumberOfPages() );
2476                         case 'numberofadmins':
2477                                 return $varCache[$index]  = $wgContLang->formatNum( wfNumberOfAdmins() );
2478                         case 'currenttimestamp':
2479                                 return $varCache[$index] = wfTimestampNow();
2480                         case 'localtimestamp':
2481                                 return $varCache[$index] = $localTimestamp;
2482                         case 'currentversion':
2483                                 return $varCache[$index] = SpecialVersion::getVersion();
2484                         case 'sitename':
2485                                 return $wgSitename;
2486                         case 'server':
2487                                 return $wgServer;
2488                         case 'servername':
2489                                 return $wgServerName;
2490                         case 'scriptpath':
2491                                 return $wgScriptPath;
2492                         case 'directionmark':
2493                                 return $wgContLang->getDirMark();
2494                         case 'contentlanguage':
2495                                 global $wgContLanguageCode;
2496                                 return $wgContLanguageCode;
2497                         default:
2498                                 $ret = null;
2499                                 if ( wfRunHooks( 'ParserGetVariableValueSwitch', array( &$this, &$varCache, &$index, &$ret ) ) )
2500                                         return $ret;
2501                                 else
2502                                         return null;
2503                 }
2504         }
2505
2506         /**
2507          * initialise the magic variables (like CURRENTMONTHNAME)
2508          *
2509          * @private
2510          */
2511         function initialiseVariables() {
2512                 $fname = 'Parser::initialiseVariables';
2513                 wfProfileIn( $fname );
2514                 $variableIDs = MagicWord::getVariableIDs();
2515
2516                 $this->mVariables = array();
2517                 foreach ( $variableIDs as $id ) {
2518                         $mw =& MagicWord::get( $id );
2519                         $mw->addToArray( $this->mVariables, $id );
2520                 }
2521                 wfProfileOut( $fname );
2522         }
2523
2524         /**
2525          * parse any parentheses in format ((title|part|part))
2526          * and call callbacks to get a replacement text for any found piece
2527          *
2528          * @param string $text The text to parse
2529          * @param array $callbacks rules in form:
2530          *     '{' => array(                            # opening parentheses
2531          *                                      'end' => '}',   # closing parentheses
2532          *                                      'cb' => array(2 => callback,    # replacement callback to call if {{..}} is found
2533          *                                                                3 => callback         # replacement callback to call if {{{..}}} is found
2534          *                                                                )
2535          *                                      )
2536          *                                      'min' => 2,     # Minimum parenthesis count in cb
2537          *                                      'max' => 3,     # Maximum parenthesis count in cb
2538          * @private
2539          */
2540         function replace_callback ($text, $callbacks) {
2541                 wfProfileIn( __METHOD__ );
2542                 $openingBraceStack = array();   # this array will hold a stack of parentheses which are not closed yet
2543                 $lastOpeningBrace = -1;                 # last not closed parentheses
2544
2545                 $validOpeningBraces = implode( '', array_keys( $callbacks ) );
2546
2547                 $i = 0;
2548                 while ( $i < strlen( $text ) ) {
2549                         # Find next opening brace, closing brace or pipe
2550                         if ( $lastOpeningBrace == -1 ) {
2551                                 $currentClosing = '';
2552                                 $search = $validOpeningBraces;
2553                         } else {
2554                                 $currentClosing = $openingBraceStack[$lastOpeningBrace]['braceEnd'];
2555                                 $search = $validOpeningBraces . '|' . $currentClosing;
2556                         }
2557                         $rule = null;
2558                         $i += strcspn( $text, $search, $i );
2559                         if ( $i < strlen( $text ) ) {
2560                                 if ( $text[$i] == '|' ) {
2561                                         $found = 'pipe';
2562                                 } elseif ( $text[$i] == $currentClosing ) {
2563                                         $found = 'close';
2564                                 } elseif ( isset( $callbacks[$text[$i]] ) ) {
2565                                         $found = 'open';
2566                                         $rule = $callbacks[$text[$i]];
2567                                 } else {
2568                                         # Some versions of PHP have a strcspn which stops on null characters
2569                                         # Ignore and continue
2570                                         ++$i;
2571                                         continue;
2572                                 }
2573                         } else {
2574                                 # All done
2575                                 break;
2576                         }
2577
2578                         if ( $found == 'open' ) {
2579                                 # found opening brace, let's add it to parentheses stack
2580                                 $piece = array('brace' => $text[$i],
2581                                                            'braceEnd' => $rule['end'],
2582                                                            'title' => '',
2583                                                            'parts' => null);
2584
2585                                 # count opening brace characters
2586                                 $piece['count'] = strspn( $text, $piece['brace'], $i );
2587                                 $piece['startAt'] = $piece['partStart'] = $i + $piece['count'];
2588                                 $i += $piece['count'];
2589
2590                                 # we need to add to stack only if opening brace count is enough for one of the rules
2591                                 if ( $piece['count'] >= $rule['min'] ) {
2592                                         $lastOpeningBrace ++;
2593                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2594                                 }
2595                         } elseif ( $found == 'close' ) {
2596                                 # lets check if it is enough characters for closing brace
2597                                 $maxCount = $openingBraceStack[$lastOpeningBrace]['count'];
2598                                 $count = strspn( $text, $text[$i], $i, $maxCount );
2599
2600                                 # check for maximum matching characters (if there are 5 closing
2601                                 # characters, we will probably need only 3 - depending on the rules)
2602                                 $matchingCount = 0;
2603                                 $matchingCallback = null;
2604                                 $cbType = $callbacks[$openingBraceStack[$lastOpeningBrace]['brace']];
2605                                 if ( $count > $cbType['max'] ) {
2606                                         # The specified maximum exists in the callback array, unless the caller
2607                                         # has made an error
2608                                         $matchingCount = $cbType['max'];
2609                                 } else {
2610                                         # Count is less than the maximum
2611                                         # Skip any gaps in the callback array to find the true largest match
2612                                         # Need to use array_key_exists not isset because the callback can be null
2613                                         $matchingCount = $count;
2614                                         while ( $matchingCount > 0 && !array_key_exists( $matchingCount, $cbType['cb'] ) ) {
2615                                                 --$matchingCount;
2616                                         }
2617                                 }
2618
2619                                 if ($matchingCount <= 0) {
2620                                         $i += $count;
2621                                         continue;
2622                                 }
2623                                 $matchingCallback = $cbType['cb'][$matchingCount];
2624
2625                                 # let's set a title or last part (if '|' was found)
2626                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2627                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2628                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2629                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2630                                 } else {
2631                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2632                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2633                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2634                                 }
2635
2636                                 $pieceStart = $openingBraceStack[$lastOpeningBrace]['startAt'] - $matchingCount;
2637                                 $pieceEnd = $i + $matchingCount;
2638
2639                                 if( is_callable( $matchingCallback ) ) {
2640                                         $cbArgs = array (
2641                                                                          'text' => substr($text, $pieceStart, $pieceEnd - $pieceStart),
2642                                                                          'title' => trim($openingBraceStack[$lastOpeningBrace]['title']),
2643                                                                          'parts' => $openingBraceStack[$lastOpeningBrace]['parts'],
2644                                                                          'lineStart' => (($pieceStart > 0) && ($text[$pieceStart-1] == "\n")),
2645                                                                          );
2646                                         # finally we can call a user callback and replace piece of text
2647                                         $replaceWith = call_user_func( $matchingCallback, $cbArgs );
2648                                         $text = substr($text, 0, $pieceStart) . $replaceWith . substr($text, $pieceEnd);
2649                                         $i = $pieceStart + strlen($replaceWith);
2650                                 } else {
2651                                         # null value for callback means that parentheses should be parsed, but not replaced
2652                                         $i += $matchingCount;
2653                                 }
2654
2655                                 # reset last opening parentheses, but keep it in case there are unused characters
2656                                 $piece = array('brace' => $openingBraceStack[$lastOpeningBrace]['brace'],
2657                                                            'braceEnd' => $openingBraceStack[$lastOpeningBrace]['braceEnd'],
2658                                                            'count' => $openingBraceStack[$lastOpeningBrace]['count'],
2659                                                            'title' => '',
2660                                                            'parts' => null,
2661                                                            'startAt' => $openingBraceStack[$lastOpeningBrace]['startAt']);
2662                                 $openingBraceStack[$lastOpeningBrace--] = null;
2663
2664                                 if ($matchingCount < $piece['count']) {
2665                                         $piece['count'] -= $matchingCount;
2666                                         $piece['startAt'] -= $matchingCount;
2667                                         $piece['partStart'] = $piece['startAt'];
2668                                         # do we still qualify for any callback with remaining count?
2669                                         $currentCbList = $callbacks[$piece['brace']]['cb'];
2670                                         while ( $piece['count'] ) {
2671                                                 if ( array_key_exists( $piece['count'], $currentCbList ) ) {
2672                                                         $lastOpeningBrace++;
2673                                                         $openingBraceStack[$lastOpeningBrace] = $piece;
2674                                                         break;
2675                                                 }
2676                                                 --$piece['count'];
2677                                         }
2678                                 }
2679                         } elseif ( $found == 'pipe' ) {
2680                                 # lets set a title if it is a first separator, or next part otherwise
2681                                 if (null === $openingBraceStack[$lastOpeningBrace]['parts']) {
2682                                         $openingBraceStack[$lastOpeningBrace]['title'] =
2683                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2684                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2685                                         $openingBraceStack[$lastOpeningBrace]['parts'] = array();
2686                                 } else {
2687                                         $openingBraceStack[$lastOpeningBrace]['parts'][] =
2688                                                 substr($text, $openingBraceStack[$lastOpeningBrace]['partStart'],
2689                                                 $i - $openingBraceStack[$lastOpeningBrace]['partStart']);
2690                                 }
2691                                 $openingBraceStack[$lastOpeningBrace]['partStart'] = ++$i;
2692                         }
2693                 }
2694
2695                 wfProfileOut( __METHOD__ );
2696                 return $text;
2697         }
2698
2699         /**
2700          * Replace magic variables, templates, and template arguments
2701          * with the appropriate text. Templates are substituted recursively,
2702          * taking care to avoid infinite loops.
2703          *
2704          * Note that the substitution depends on value of $mOutputType:
2705          *  OT_WIKI: only {{subst:}} templates
2706          *  OT_MSG: only magic variables
2707          *  OT_HTML: all templates and magic variables
2708          *
2709          * @param string $tex The text to transform
2710          * @param array $args Key-value pairs representing template parameters to substitute
2711          * @param bool $argsOnly Only do argument (triple-brace) expansion, not double-brace expansion
2712          * @private
2713          */
2714         function replaceVariables( $text, $args = array(), $argsOnly = false ) {
2715                 # Prevent too big inclusions
2716                 if( strlen( $text ) > $this->mOptions->getMaxIncludeSize() ) {
2717                         return $text;
2718                 }
2719
2720                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2721                 wfProfileIn( $fname );
2722
2723                 # This function is called recursively. To keep track of arguments we need a stack:
2724                 array_push( $this->mArgStack, $args );
2725
2726                 $braceCallbacks = array();
2727                 if ( !$argsOnly ) {
2728                         $braceCallbacks[2] = array( &$this, 'braceSubstitution' );
2729                 }
2730                 if ( $this->mOutputType != OT_MSG ) {
2731                         $braceCallbacks[3] = array( &$this, 'argSubstitution' );
2732                 }
2733                 if ( $braceCallbacks ) {
2734                         $callbacks = array(
2735                                 '{' => array(
2736                                         'end' => '}',
2737                                         'cb' => $braceCallbacks,
2738                                         'min' => $argsOnly ? 3 : 2,
2739                                         'max' => isset( $braceCallbacks[3] ) ? 3 : 2,
2740                                 ),
2741                                 '[' => array(
2742                                         'end' => ']',
2743                                         'cb' => array(2=>null),
2744                                         'min' => 2,
2745                                         'max' => 2,
2746                                 )
2747                         );
2748                         $text = $this->replace_callback ($text, $callbacks);
2749
2750                         array_pop( $this->mArgStack );
2751                 }
2752                 wfProfileOut( $fname );
2753                 return $text;
2754         }
2755
2756         /**
2757          * Replace magic variables
2758          * @private
2759          */
2760         function variableSubstitution( $matches ) {
2761                 global $wgContLang;
2762                 $fname = 'Parser::variableSubstitution';
2763                 $varname = $wgContLang->lc($matches[1]);
2764                 wfProfileIn( $fname );
2765                 $skip = false;
2766                 if ( $this->mOutputType == OT_WIKI ) {
2767                         # Do only magic variables prefixed by SUBST
2768                         $mwSubst =& MagicWord::get( 'subst' );
2769                         if (!$mwSubst->matchStartAndRemove( $varname ))
2770                                 $skip = true;
2771                         # Note that if we don't substitute the variable below,
2772                         # we don't remove the {{subst:}} magic word, in case
2773                         # it is a template rather than a magic variable.
2774                 }
2775                 if ( !$skip && array_key_exists( $varname, $this->mVariables ) ) {
2776                         $id = $this->mVariables[$varname];
2777                         # Now check if we did really match, case sensitive or not
2778                         $mw =& MagicWord::get( $id );
2779                         if ($mw->match($matches[1])) {
2780                                 $text = $this->getVariableValue( $id );
2781                                 $this->mOutput->mContainsOldMagic = true;
2782                         } else {
2783                                 $text = $matches[0];
2784                         }
2785                 } else {
2786                         $text = $matches[0];
2787                 }
2788                 wfProfileOut( $fname );
2789                 return $text;
2790         }
2791
2792         /**
2793          * Return the text of a template, after recursively
2794          * replacing any variables or templates within the template.
2795          *
2796          * @param array $piece The parts of the template
2797          *  $piece['text']: matched text
2798          *  $piece['title']: the title, i.e. the part before the |
2799          *  $piece['parts']: the parameter array
2800          * @return string the text of the template
2801          * @private
2802          */
2803         function braceSubstitution( $piece ) {
2804                 global $wgContLang, $wgLang, $wgAllowDisplayTitle, $action;
2805                 $fname = __METHOD__ /*. '-L' . count( $this->mArgStack )*/;
2806                 wfProfileIn( $fname );
2807                 wfProfileIn( __METHOD__.'-setup' );
2808
2809                 # Flags
2810                 $found = false;             # $text has been filled
2811                 $nowiki = false;            # wiki markup in $text should be escaped
2812                 $noparse = false;           # Unsafe HTML tags should not be stripped, etc.
2813                 $noargs = false;            # Don't replace triple-brace arguments in $text
2814                 $replaceHeadings = false;   # Make the edit section links go to the template not the article
2815                 $isHTML = false;            # $text is HTML, armour it against wikitext transformation
2816                 $forceRawInterwiki = false; # Force interwiki transclusion to be done in raw mode not rendered
2817
2818                 # Title object, where $text came from
2819                 $title = NULL;
2820
2821                 $linestart = '';
2822
2823
2824                 # $part1 is the bit before the first |, and must contain only title characters
2825                 # $args is a list of arguments, starting from index 0, not including $part1
2826
2827                 $titleText = $part1 = $piece['title'];
2828                 # If the third subpattern matched anything, it will start with |
2829
2830                 if (null == $piece['parts']) {
2831                         $replaceWith = $this->variableSubstitution (array ($piece['text'], $piece['title']));
2832                         if ($replaceWith != $piece['text']) {
2833                                 $text = $replaceWith;
2834                                 $found = true;
2835                                 $noparse = true;
2836                                 $noargs = true;
2837                         }
2838                 }
2839
2840                 $args = (null == $piece['parts']) ? array() : $piece['parts'];
2841                 $argc = count( $args );
2842                 wfProfileOut( __METHOD__.'-setup' );
2843
2844                 # SUBST
2845                 wfProfileIn( __METHOD__.'-modifiers' );
2846                 if ( !$found ) {
2847                         $mwSubst =& MagicWord::get( 'subst' );
2848                         if ( $mwSubst->matchStartAndRemove( $part1 ) xor $this->ot['wiki'] ) {
2849                                 # One of two possibilities is true:
2850                                 # 1) Found SUBST but not in the PST phase
2851                                 # 2) Didn't find SUBST and in the PST phase
2852                                 # In either case, return without further processing
2853                                 $text = $piece['text'];
2854                                 $found = true;
2855                                 $noparse = true;
2856                                 $noargs = true;
2857                         }
2858                 }
2859
2860                 # MSG, MSGNW and RAW
2861                 if ( !$found ) {
2862                         # Check for MSGNW:
2863                         $mwMsgnw =& MagicWord::get( 'msgnw' );
2864                         if ( $mwMsgnw->matchStartAndRemove( $part1 ) ) {
2865                                 $nowiki = true;
2866                         } else {
2867                                 # Remove obsolete MSG:
2868                                 $mwMsg =& MagicWord::get( 'msg' );
2869                                 $mwMsg->matchStartAndRemove( $part1 );
2870                         }
2871
2872                         # Check for RAW:
2873                         $mwRaw =& MagicWord::get( 'raw' );
2874                         if ( $mwRaw->matchStartAndRemove( $part1 ) ) {
2875                                 $forceRawInterwiki = true;
2876                         }
2877                 }
2878                 wfProfileOut( __METHOD__.'-modifiers' );
2879
2880                 # Parser functions
2881                 if ( !$found ) {
2882                         wfProfileIn( __METHOD__ . '-pfunc' );
2883
2884                         $colonPos = strpos( $part1, ':' );
2885                         if ( $colonPos !== false ) {
2886                                 # Case sensitive functions
2887                                 $function = substr( $part1, 0, $colonPos );
2888                                 if ( isset( $this->mFunctionSynonyms[1][$function] ) ) {
2889                                         $function = $this->mFunctionSynonyms[1][$function];
2890                                 } else {
2891                                         # Case insensitive functions
2892                                         $function = strtolower( $function );
2893                                         if ( isset( $this->mFunctionSynonyms[0][$function] ) ) {
2894                                                 $function = $this->mFunctionSynonyms[0][$function];
2895                                         } else {
2896                                                 $function = false;
2897                                         }
2898                                 }
2899                                 if ( $function ) {
2900                                         $funcArgs = array_map( 'trim', $args );
2901                                         $funcArgs = array_merge( array( &$this, trim( substr( $part1, $colonPos + 1 ) ) ), $funcArgs );
2902                                         $result = call_user_func_array( $this->mFunctionHooks[$function], $funcArgs );
2903                                         $found = true;
2904
2905                                         // The text is usually already parsed, doesn't need triple-brace tags expanded, etc.
2906                                         //$noargs = true;
2907                                         //$noparse = true;
2908
2909                                         if ( is_array( $result ) ) {
2910                                                 if ( isset( $result[0] ) ) {
2911                                                         $text = $linestart . $result[0];
2912                                                         unset( $result[0] );
2913                                                 }
2914
2915                                                 // Extract flags into the local scope
2916                                                 // This allows callers to set flags such as nowiki, noparse, found, etc.
2917                                                 extract( $result );
2918                                         } else {
2919                                                 $text = $linestart . $result;
2920                                         }
2921                                 }
2922                         }
2923                         wfProfileOut( __METHOD__ . '-pfunc' );
2924                 }
2925
2926                 # Template table test
2927
2928                 # Did we encounter this template already? If yes, it is in the cache
2929                 # and we need to check for loops.
2930                 if ( !$found && isset( $this->mTemplates[$piece['title']] ) ) {
2931                         $found = true;
2932
2933                         # Infinite loop test
2934                         if ( isset( $this->mTemplatePath[$part1] ) ) {
2935                                 $noparse = true;
2936                                 $noargs = true;
2937                                 $found = true;
2938                                 $text = $linestart .
2939                                         "[[$part1]]<!-- WARNING: template loop detected -->";
2940                                 wfDebug( __METHOD__.": template loop broken at '$part1'\n" );
2941                         } else {
2942                                 # set $text to cached message.
2943                                 $text = $linestart . $this->mTemplates[$piece['title']];
2944                         }
2945                 }
2946
2947                 # Load from database
2948                 $lastPathLevel = $this->mTemplatePath;
2949                 if ( !$found ) {
2950                         wfProfileIn( __METHOD__ . '-loadtpl' );
2951                         $ns = NS_TEMPLATE;
2952                         # declaring $subpage directly in the function call
2953                         # does not work correctly with references and breaks
2954                         # {{/subpage}}-style inclusions
2955                         $subpage = '';
2956                         $part1 = $this->maybeDoSubpageLink( $part1, $subpage );
2957                         if ($subpage !== '') {
2958                                 $ns = $this->mTitle->getNamespace();
2959                         }
2960                         $title = Title::newFromText( $part1, $ns );
2961
2962
2963                         if ( !is_null( $title ) ) {
2964                                 $titleText = $title->getPrefixedText();
2965                                 $checkVariantLink = sizeof($wgContLang->getVariants())>1;
2966                                 # Check for language variants if the template is not found
2967                                 if($checkVariantLink && $title->getArticleID() == 0){
2968                                         $wgContLang->findVariantLink($part1, $title);
2969                                 }
2970
2971                                 if ( !$title->isExternal() ) {
2972                                         if ( $title->getNamespace() == NS_SPECIAL && $this->mOptions->getAllowSpecialInclusion() && $this->ot['html'] ) {
2973                                                 $text = SpecialPage::capturePath( $title );
2974                                                 if ( is_string( $text ) ) {
2975                                                         $found = true;
2976                                                         $noparse = true;
2977                                                         $noargs = true;
2978                                                         $isHTML = true;
2979                                                         $this->disableCache();
2980                                                 }
2981                                         } else {
2982                                                 $articleContent = $this->fetchTemplate( $title );
2983                                                 if ( $articleContent !== false ) {
2984                                                         $found = true;
2985                                                         $text = $articleContent;
2986                                                         $replaceHeadings = true;
2987                                                 }
2988                                         }
2989
2990                                         # If the title is valid but undisplayable, make a link to it
2991                                         if ( !$found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
2992                                                 $text = "[[:$titleText]]";
2993                                                 $found = true;
2994                                         }
2995                                 } elseif ( $title->isTrans() ) {
2996                                         // Interwiki transclusion
2997                                         if ( $this->ot['html'] && !$forceRawInterwiki ) {
2998                                                 $text = $this->interwikiTransclude( $title, 'render' );
2999                                                 $isHTML = true;
3000                                                 $noparse = true;
3001                                         } else {
3002                                                 $text = $this->interwikiTransclude( $title, 'raw' );
3003                                                 $replaceHeadings = true;
3004                                         }
3005                                         $found = true;
3006                                 }
3007
3008                                 # Template cache array insertion
3009                                 # Use the original $piece['title'] not the mangled $part1, so that
3010                                 # modifiers such as RAW: produce separate cache entries
3011                                 if( $found ) {
3012                                         if( $isHTML ) {
3013                                                 // A special page; don't store it in the template cache.
3014                                         } else {
3015                                                 $this->mTemplates[$piece['title']] = $text;
3016                                         }
3017                                         $text = $linestart . $text;
3018                                 }
3019                         }
3020                         wfProfileOut( __METHOD__ . '-loadtpl' );
3021                 }
3022
3023                 if ( $found && !$this->incrementIncludeSize( 'pre-expand', strlen( $text ) ) ) {
3024                         # Error, oversize inclusion
3025                         $text = $linestart .
3026                                 "[[$titleText]]<!-- WARNING: template omitted, pre-expand include size too large -->";
3027                         $noparse = true;
3028                         $noargs = true;
3029                 }
3030
3031                 # Recursive parsing, escaping and link table handling
3032                 # Only for HTML output
3033                 if ( $nowiki && $found && ( $this->ot['html'] || $this->ot['pre'] ) ) {
3034                         $text = wfEscapeWikiText( $text );
3035                 } elseif ( !$this->ot['msg'] && $found ) {
3036                         if ( $noargs ) {
3037                                 $assocArgs = array();
3038                         } else {
3039                                 # Clean up argument array
3040                                 $assocArgs = array();
3041                                 $index = 1;
3042                                 foreach( $args as $arg ) {
3043                                         $eqpos = strpos( $arg, '=' );
3044                                         if ( $eqpos === false ) {
3045                                                 $assocArgs[$index++] = $arg;
3046                                         } else {
3047                                                 $name = trim( substr( $arg, 0, $eqpos ) );
3048                                                 $value = trim( substr( $arg, $eqpos+1 ) );
3049                                                 if ( $value === false ) {
3050                                                         $value = '';
3051                                                 }
3052                                                 if ( $name !== false ) {
3053                                                         $assocArgs[$name] = $value;
3054                                                 }
3055                                         }
3056                                 }
3057
3058                                 # Add a new element to the templace recursion path
3059                                 $this->mTemplatePath[$part1] = 1;
3060                         }
3061
3062                         if ( !$noparse ) {
3063                                 # If there are any <onlyinclude> tags, only include them
3064                                 if ( in_string( '<onlyinclude>', $text ) && in_string( '</onlyinclude>', $text ) ) {
3065                                         preg_match_all( '/<onlyinclude>(.*?)\n?<\/onlyinclude>/s', $text, $m );
3066                                         $text = '';
3067                                         foreach ($m[1] as $piece)
3068                                                 $text .= $piece;
3069                                 }
3070                                 # Remove <noinclude> sections and <includeonly> tags
3071                                 $text = preg_replace( '/<noinclude>.*?<\/noinclude>/s', '', $text );
3072                                 $text = strtr( $text, array( '<includeonly>' => '' , '</includeonly>' => '' ) );
3073
3074                                 if( $this->ot['html'] || $this->ot['pre'] ) {
3075                                         # Strip <nowiki>, <pre>, etc.
3076                                         $text = $this->strip( $text, $this->mStripState );
3077                                         if ( $this->ot['html'] ) {
3078                                                 $text = Sanitizer::removeHTMLtags( $text, array( &$this, 'replaceVariables' ), $assocArgs );
3079                                         } elseif ( $this->ot['pre'] && $this->mOptions->getRemoveComments() ) {
3080                                                 $text = Sanitizer::removeHTMLcomments( $text );
3081                                         }
3082                                 }
3083                                 $text = $this->replaceVariables( $text, $assocArgs );
3084
3085                                 # If the template begins with a table or block-level
3086                                 # element, it should be treated as beginning a new line.
3087                                 if (!$piece['lineStart'] && preg_match('/^({\\||:|;|#|\*)/', $text)) /*}*/{
3088                                         $text = "\n" . $text;
3089                                 }
3090                         } elseif ( !$noargs ) {
3091                                 # $noparse and !$noargs
3092                                 # Just replace the arguments, not any double-brace items
3093                                 # This is used for rendered interwiki transclusion
3094                                 $text = $this->replaceVariables( $text, $assocArgs, true );
3095                         }
3096                 }
3097                 # Prune lower levels off the recursion check path
3098                 $this->mTemplatePath = $lastPathLevel;
3099
3100                 if ( $found && !$this->incrementIncludeSize( 'post-expand', strlen( $text ) ) ) {
3101                         # Error, oversize inclusion
3102                         $text = $linestart .
3103                                 "[[$titleText]]<!-- WARNING: template omitted, post-expand include size too large -->";
3104                         $noparse = true;
3105                         $noargs = true;
3106                 }
3107
3108                 if ( !$found ) {
3109                         wfProfileOut( $fname );
3110                         return $piece['text'];
3111                 } else {
3112                         wfProfileIn( __METHOD__ . '-placeholders' );
3113                         if ( $isHTML ) {
3114                                 # Replace raw HTML by a placeholder
3115                                 # Add a blank line preceding, to prevent it from mucking up
3116                                 # immediately preceding headings
3117                                 $text = "\n\n" . $this->insertStripItem( $text, $this->mStripState );
3118                         } else {
3119                                 # replace ==section headers==
3120                                 # XXX this needs to go away once we have a better parser.
3121                                 if ( !$this->ot['wiki'] && !$this->ot['pre'] && $replaceHeadings ) {
3122                                         if( !is_null( $title ) )
3123                                                 $encodedname = base64_encode($title->getPrefixedDBkey());
3124                                         else
3125                                                 $encodedname = base64_encode("");
3126                                         $m = preg_split('/(^={1,6}.*?={1,6}\s*?$)/m', $text, -1,
3127                                                 PREG_SPLIT_DELIM_CAPTURE);
3128                                         $text = '';
3129                                         $nsec = 0;
3130                                         for( $i = 0; $i < count($m); $i += 2 ) {
3131                                                 $text .= $m[$i];
3132                                                 if (!isset($m[$i + 1]) || $m[$i + 1] == "") continue;
3133                                                 $hl = $m[$i + 1];
3134                                                 if( strstr($hl, "<!--MWTEMPLATESECTION") ) {
3135                                                         $text .= $hl;
3136                                                         continue;
3137                                                 }
3138                                                 preg_match('/^(={1,6})(.*?)(={1,6})\s*?$/m', $hl, $m2);
3139                                                 $text .= $m2[1] . $m2[2] . "<!--MWTEMPLATESECTION="
3140                                                         . $encodedname . "&" . base64_encode("$nsec") . "-->" . $m2[3];
3141
3142                                                 $nsec++;
3143                                         }
3144                                 }
3145                         }
3146                         wfProfileOut( __METHOD__ . '-placeholders' );
3147                 }
3148
3149                 # Prune lower levels off the recursion check path
3150                 $this->mTemplatePath = $lastPathLevel;
3151
3152                 if ( !$found ) {
3153                         wfProfileOut( $fname );
3154                         return $piece['text'];
3155                 } else {
3156                         wfProfileOut( $fname );
3157                         return $text;
3158                 }
3159         }
3160
3161         /**
3162          * Fetch the unparsed text of a template and register a reference to it.
3163          */
3164         function fetchTemplate( $title ) {
3165                 $text = false;
3166                 // Loop to fetch the article, with up to 1 redirect
3167                 for ( $i = 0; $i < 2 && is_object( $title ); $i++ ) {
3168                         $rev = Revision::newFromTitle( $title );
3169                         $this->mOutput->addTemplate( $title, $title->getArticleID() );
3170                         if ( !$rev ) {
3171                                 break;
3172                         }
3173                         $text = $rev->getText();
3174                         if ( $text === false ) {
3175                                 break;
3176                         }
3177                         // Redirect?
3178                         $title = Title::newFromRedirect( $text );
3179                 }
3180                 return $text;
3181         }
3182
3183         /**
3184          * Transclude an interwiki link.
3185          */
3186         function interwikiTransclude( $title, $action ) {
3187                 global $wgEnableScaryTranscluding, $wgCanonicalNamespaceNames;
3188
3189                 if (!$wgEnableScaryTranscluding)
3190                         return wfMsg('scarytranscludedisabled');
3191
3192                 // The namespace will actually only be 0 or 10, depending on whether there was a leading :
3193                 // But we'll handle it generally anyway
3194                 if ( $title->getNamespace() ) {
3195                         // Use the canonical namespace, which should work anywhere
3196                         $articleName = $wgCanonicalNamespaceNames[$title->getNamespace()] . ':' . $title->getDBkey();
3197                 } else {
3198                         $articleName = $title->getDBkey();
3199                 }
3200
3201                 $url = str_replace('$1', urlencode($articleName), Title::getInterwikiLink($title->getInterwiki()));
3202                 $url .= "?action=$action";
3203                 if (strlen($url) > 255)
3204                         return wfMsg('scarytranscludetoolong');
3205                 return $this->fetchScaryTemplateMaybeFromCache($url);
3206         }
3207
3208         function fetchScaryTemplateMaybeFromCache($url) {
3209                 global $wgTranscludeCacheExpiry;
3210                 $dbr =& wfGetDB(DB_SLAVE);
3211                 $obj = $dbr->selectRow('transcache', array('tc_time', 'tc_contents'),
3212                                 array('tc_url' => $url));
3213                 if ($obj) {
3214                         $time = $obj->tc_time;
3215                         $text = $obj->tc_contents;
3216                         if ($time && time() < $time + $wgTranscludeCacheExpiry ) {
3217                                 return $text;
3218                         }
3219                 }
3220
3221                 $text = Http::get($url);
3222                 if (!$text)
3223                         return wfMsg('scarytranscludefailed', $url);
3224
3225                 $dbw =& wfGetDB(DB_MASTER);
3226                 $dbw->replace('transcache', array('tc_url'), array(
3227                         'tc_url' => $url,
3228                         'tc_time' => time(),
3229                         'tc_contents' => $text));
3230                 return $text;
3231         }
3232
3233
3234         /**
3235          * Triple brace replacement -- used for template arguments
3236          * @private
3237          */
3238         function argSubstitution( $matches ) {
3239                 $arg = trim( $matches['title'] );
3240                 $text = $matches['text'];
3241                 $inputArgs = end( $this->mArgStack );
3242
3243                 if ( array_key_exists( $arg, $inputArgs ) ) {
3244                         $text = $inputArgs[$arg];
3245                 } else if (($this->mOutputType == OT_HTML || $this->mOutputType == OT_PREPROCESS ) &&
3246                 null != $matches['parts'] && count($matches['parts']) > 0) {
3247                         $text = $matches['parts'][0];
3248                 }
3249                 if ( !$this->incrementIncludeSize( 'arg', strlen( $text ) ) ) {
3250                         $text = $matches['text'] .
3251                                 '<!-- WARNING: argument omitted, expansion size too large -->';
3252                 }
3253
3254                 return $text;
3255         }
3256
3257         /**
3258          * Increment an include size counter
3259          *
3260          * @param string $type The type of expansion
3261          * @param integer $size The size of the text
3262          * @return boolean False if this inclusion would take it over the maximum, true otherwise
3263          */
3264         function incrementIncludeSize( $type, $size ) {
3265                 if ( $this->mIncludeSizes[$type] + $size > $this->mOptions->getMaxIncludeSize() ) {
3266                         return false;
3267                 } else {
3268                         $this->mIncludeSizes[$type] += $size;
3269                         return true;
3270                 }
3271         }
3272
3273         /**
3274          * Detect __NOGALLERY__ magic word and set a placeholder
3275          */
3276         function stripNoGallery( &$text ) {
3277                 # if the string __NOGALLERY__ (not case-sensitive) occurs in the HTML,
3278                 # do not add TOC
3279                 $mw = MagicWord::get( 'nogallery' );
3280                 $this->mOutput->mNoGallery = $mw->matchAndRemove( $text ) ;
3281         }
3282
3283         /**
3284          * Detect __TOC__ magic word and set a placeholder
3285          */
3286         function stripToc( $text ) {
3287                 # if the string __NOTOC__ (not case-sensitive) occurs in the HTML,
3288                 # do not add TOC
3289                 $mw = MagicWord::get( 'notoc' );
3290                 if( $mw->matchAndRemove( $text ) ) {
3291                         $this->mShowToc = false;
3292                 }
3293
3294                 $mw = MagicWord::get( 'toc' );
3295                 if( $mw->match( $text ) ) {
3296                         $this->mShowToc = true;
3297                         $this->mForceTocPosition = true;
3298
3299                         // Set a placeholder. At the end we'll fill it in with the TOC.
3300                         $text = $mw->replace( '<!--MWTOC-->', $text, 1 );
3301
3302                         // Only keep the first one.
3303                         $text = $mw->replace( '', $text );
3304                 }
3305                 return $text;
3306         }
3307
3308         /**
3309          * This function accomplishes several tasks:
3310          * 1) Auto-number headings if that option is enabled
3311          * 2) Add an [edit] link to sections for logged in users who have enabled the option
3312          * 3) Add a Table of contents on the top for users who have enabled the option
3313          * 4) Auto-anchor headings
3314          *
3315          * It loops through all headlines, collects the necessary data, then splits up the
3316          * string and re-inserts the newly formatted headlines.
3317          *
3318          * @param string $text
3319          * @param boolean $isMain
3320          * @private
3321          */
3322         function formatHeadings( $text, $isMain=true ) {
3323                 global $wgMaxTocLevel, $wgContLang;
3324
3325                 $doNumberHeadings = $this->mOptions->getNumberHeadings();
3326                 if( !$this->mTitle->userCanEdit() ) {
3327                         $showEditLink = 0;
3328                 } else {
3329                         $showEditLink = $this->mOptions->getEditSection();
3330                 }
3331
3332                 # Inhibit editsection links if requested in the page
3333                 $esw =& MagicWord::get( 'noeditsection' );
3334                 if( $esw->matchAndRemove( $text ) ) {
3335                         $showEditLink = 0;
3336                 }
3337
3338                 # Get all headlines for numbering them and adding funky stuff like [edit]
3339                 # links - this is for later, but we need the number of headlines right now
3340                 $numMatches = preg_match_all( '/<H([1-6])(.*?'.'>)(.*?)<\/H[1-6] *>/i', $text, $matches );
3341
3342                 # if there are fewer than 4 headlines in the article, do not show TOC
3343                 # unless it's been explicitly enabled.
3344                 $enoughToc = $this->mShowToc &&
3345                         (($numMatches >= 4) || $this->mForceTocPosition);
3346
3347                 # Allow user to stipulate that a page should have a "new section"
3348                 # link added via __NEWSECTIONLINK__
3349                 $mw =& MagicWord::get( 'newsectionlink' );
3350                 if( $mw->matchAndRemove( $text ) )
3351                         $this->mOutput->setNewSection( true );
3352
3353                 # if the string __FORCETOC__ (not case-sensitive) occurs in the HTML,
3354                 # override above conditions and always show TOC above first header
3355                 $mw =& MagicWord::get( 'forcetoc' );
3356                 if ($mw->matchAndRemove( $text ) ) {
3357                         $this->mShowToc = true;
3358                         $enoughToc = true;
3359                 }
3360
3361                 # Never ever show TOC if no headers
3362                 if( $numMatches < 1 ) {
3363                         $enoughToc = false;
3364                 }
3365
3366                 # We need this to perform operations on the HTML
3367                 $sk =& $this->mOptions->getSkin();
3368
3369                 # headline counter
3370                 $headlineCount = 0;
3371                 $sectionCount = 0; # headlineCount excluding template sections
3372
3373                 # Ugh .. the TOC should have neat indentation levels which can be
3374                 # passed to the skin functions. These are determined here
3375                 $toc = '';
3376                 $full = '';
3377                 $head = array();
3378                 $sublevelCount = array();
3379                 $levelCount = array();
3380                 $toclevel = 0;
3381                 $level = 0;
3382                 $prevlevel = 0;
3383                 $toclevel = 0;
3384                 $prevtoclevel = 0;
3385
3386                 foreach( $matches[3] as $headline ) {
3387                         $istemplate = 0;
3388                         $templatetitle = '';
3389                         $templatesection = 0;
3390                         $numbering = '';
3391
3392                         if (preg_match("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", $headline, $mat)) {
3393                                 $istemplate = 1;
3394                                 $templatetitle = base64_decode($mat[1]);
3395                                 $templatesection = 1 + (int)base64_decode($mat[2]);
3396                                 $headline = preg_replace("/<!--MWTEMPLATESECTION=([^&]+)&([^_]+)-->/", "", $headline);
3397                         }
3398
3399                         if( $toclevel ) {
3400                                 $prevlevel = $level;
3401                                 $prevtoclevel = $toclevel;
3402                         }
3403                         $level = $matches[1][$headlineCount];
3404
3405                         if( $doNumberHeadings || $enoughToc ) {
3406
3407                                 if ( $level > $prevlevel ) {
3408                                         # Increase TOC level
3409                                         $toclevel++;
3410                                         $sublevelCount[$toclevel] = 0;
3411                                         if( $toclevel<$wgMaxTocLevel ) {
3412                                                 $toc .= $sk->tocIndent();
3413                                         }
3414                                 }
3415                                 elseif ( $level < $prevlevel && $toclevel > 1 ) {
3416                                         # Decrease TOC level, find level to jump to
3417
3418                                         if ( $toclevel == 2 && $level <= $levelCount[1] ) {
3419                                                 # Can only go down to level 1
3420                                                 $toclevel = 1;
3421                                         } else {
3422                                                 for ($i = $toclevel; $i > 0; $i--) {
3423                                                         if ( $levelCount[$i] == $level ) {
3424                                                                 # Found last matching level
3425                                                                 $toclevel = $i;
3426                                                                 break;
3427                                                         }
3428                                                         elseif ( $levelCount[$i] < $level ) {
3429                                                                 # Found first matching level below current level
3430                                                                 $toclevel = $i + 1;
3431                                                                 break;
3432                                                         }
3433                                                 }
3434                                         }
3435                                         if( $toclevel<$wgMaxTocLevel ) {
3436                                                 $toc .= $sk->tocUnindent( $prevtoclevel - $toclevel );
3437                                         }
3438                                 }
3439                                 else {
3440                                         # No change in level, end TOC line
3441                                         if( $toclevel<$wgMaxTocLevel ) {
3442                                                 $toc .= $sk->tocLineEnd();
3443                                         }
3444                                 }
3445
3446                                 $levelCount[$toclevel] = $level;
3447
3448                                 # count number of headlines for each level
3449                                 @$sublevelCount[$toclevel]++;
3450                                 $dot = 0;
3451                                 for( $i = 1; $i <= $toclevel; $i++ ) {
3452                                         if( !empty( $sublevelCount[$i] ) ) {
3453                                                 if( $dot ) {
3454                                                         $numbering .= '.';
3455                                                 }
3456                                                 $numbering .= $wgContLang->formatNum( $sublevelCount[$i] );
3457                                                 $dot = 1;
3458                                         }
3459                                 }
3460                         }
3461
3462                         # The canonized header is a version of the header text safe to use for links
3463                         # Avoid insertion of weird stuff like <math> by expanding the relevant sections
3464                         $canonized_headline = $this->unstrip( $headline, $this->mStripState );
3465                         $canonized_headline = $this->unstripNoWiki( $canonized_headline, $this->mStripState );
3466
3467                         # Remove link placeholders by the link text.
3468                         #     <!--LINK number-->
3469                         # turns into
3470                         #     link text with suffix
3471                         $canonized_headline = preg_replace( '/<!--LINK ([0-9]*)-->/e',
3472                                                             "\$this->mLinkHolders['texts'][\$1]",
3473                                                             $canonized_headline );
3474                         $canonized_headline = preg_replace( '/<!--IWLINK ([0-9]*)-->/e',
3475                                                             "\$this->mInterwikiLinkHolders['texts'][\$1]",
3476                                                             $canonized_headline );
3477
3478                         # strip out HTML
3479                         $canonized_headline = preg_replace( '/<.*?' . '>/','',$canonized_headline );
3480                         $tocline = trim( $canonized_headline );
3481                         # Save headline for section edit hint before it's escaped
3482                         $headline_hint = trim( $canonized_headline );
3483                         $canonized_headline = Sanitizer::escapeId( $tocline );
3484                         $refers[$headlineCount] = $canonized_headline;
3485
3486                         # count how many in assoc. array so we can track dupes in anchors
3487                         @$refers[$canonized_headline]++;
3488                         $refcount[$headlineCount]=$refers[$canonized_headline];
3489
3490                         # Don't number the heading if it is the only one (looks silly)
3491                         if( $doNumberHeadings && count( $matches[3] ) > 1) {
3492                                 # the two are different if the line contains a link
3493                                 $headline=$numbering . ' ' . $headline;
3494                         }
3495
3496                         # Create the anchor for linking from the TOC to the section
3497                         $anchor = $canonized_headline;
3498                         if($refcount[$headlineCount] > 1 ) {
3499                                 $anchor .= '_' . $refcount[$headlineCount];
3500                         }
3501                         if( $enoughToc && ( !isset($wgMaxTocLevel) || $toclevel<$wgMaxTocLevel ) ) {
3502                                 $toc .= $sk->tocLine($anchor, $tocline, $numbering, $toclevel);
3503                         }
3504                         if( $showEditLink && ( !$istemplate || $templatetitle !== "" ) ) {
3505                                 if ( empty( $head[$headlineCount] ) ) {
3506                                         $head[$headlineCount] = '';
3507                                 }
3508                                 if( $istemplate )
3509                                         $head[$headlineCount] .= $sk->editSectionLinkForOther($templatetitle, $templatesection);
3510                                 else
3511                                         $head[$headlineCount] .= $sk->editSectionLink($this->mTitle, $sectionCount+1, $headline_hint);
3512                         }
3513
3514                         # give headline the correct <h#> tag
3515                         @$head[$headlineCount] .= "<a name=\"$anchor\"></a><h".$level.$matches[2][$headlineCount] .$headline.'</h'.$level.'>';
3516
3517                         $headlineCount++;
3518                         if( !$istemplate )
3519                                 $sectionCount++;
3520                 }
3521
3522                 if( $enoughToc ) {
3523                         if( $toclevel<$wgMaxTocLevel ) {
3524                                 $toc .= $sk->tocUnindent( $toclevel - 1 );
3525                         }
3526                         $toc = $sk->tocList( $toc );
3527                 }
3528
3529                 # split up and insert constructed headlines
3530
3531                 $blocks = preg_split( '/<H[1-6].*?' . '>.*?<\/H[1-6]>/i', $text );
3532                 $i = 0;
3533
3534                 foreach( $blocks as $block ) {
3535                         if( $showEditLink && $headlineCount > 0 && $i == 0 && $block != "\n" ) {
3536                                 # This is the [edit] link that appears for the top block of text when
3537                                 # section editing is enabled
3538
3539                                 # Disabled because it broke block formatting
3540                                 # For example, a bullet point in the top line
3541                                 # $full .= $sk->editSectionLink(0);
3542                         }
3543                         $full .= $block;
3544                         if( $enoughToc && !$i && $isMain && !$this->mForceTocPosition ) {
3545                                 # Top anchor now in skin
3546                                 $full = $full.$toc;
3547                         }
3548
3549                         if( !empty( $head[$i] ) ) {
3550                                 $full .= $head[$i];
3551                         }
3552                         $i++;
3553                 }
3554                 if( $this->mForceTocPosition ) {
3555                         return str_replace( '<!--MWTOC-->', $toc, $full );
3556                 } else {
3557                         return $full;
3558                 }
3559         }
3560
3561         /**
3562          * Transform wiki markup when saving a page by doing \r\n -> \n
3563          * conversion, substitting signatures, {{subst:}} templates, etc.
3564          *
3565          * @param string $text the text to transform
3566          * @param Title &$title the Title object for the current article
3567          * @param User &$user the User object describing the current user
3568          * @param ParserOptions $options parsing options
3569          * @param bool $clearState whether to clear the parser state first
3570          * @return string the altered wiki markup
3571          * @public
3572          */
3573         function preSaveTransform( $text, &$title, &$user, $options, $clearState = true ) {
3574                 $this->mOptions = $options;
3575                 $this->mTitle =& $title;
3576                 $this->setOutputType( OT_WIKI );
3577
3578                 if ( $clearState ) {
3579                         $this->clearState();
3580                 }
3581
3582                 $stripState = false;
3583                 $pairs = array(
3584                         "\r\n" => "\n",
3585                 );
3586                 $text = str_replace( array_keys( $pairs ), array_values( $pairs ), $text );
3587                 $text = $this->strip( $text, $stripState, true, array( 'gallery' ) );
3588                 $text = $this->pstPass2( $text, $stripState, $user );
3589                 $text = $this->unstrip( $text, $stripState );
3590                 $text = $this->unstripNoWiki( $text, $stripState );
3591                 return $text;
3592         }
3593
3594         /**
3595          * Pre-save transform helper function
3596          * @private
3597          */
3598         function pstPass2( $text, &$stripState, &$user ) {
3599                 global $wgContLang, $wgLocaltimezone;
3600
3601                 /* Note: This is the timestamp saved as hardcoded wikitext to
3602                  * the database, we use $wgContLang here in order to give
3603                  * everyone the same signature and use the default one rather
3604                  * than the one selected in each user's preferences.
3605                  */
3606                 if ( isset( $wgLocaltimezone ) ) {
3607                         $oldtz = getenv( 'TZ' );
3608                         putenv( 'TZ='.$wgLocaltimezone );
3609                 }
3610                 $d = $wgContLang->timeanddate( date( 'YmdHis' ), false, false) .
3611                   ' (' . date( 'T' ) . ')';
3612                 if ( isset( $wgLocaltimezone ) ) {
3613                         putenv( 'TZ='.$oldtz );
3614                 }
3615
3616                 # Variable replacement
3617                 # Because mOutputType is OT_WIKI, this will only process {{subst:xxx}} type tags
3618                 $text = $this->replaceVariables( $text );
3619
3620                 # Strip out <nowiki> etc. added via replaceVariables
3621                 $text = $this->strip( $text, $stripState, false, array( 'gallery' ) );
3622
3623                 # Signatures
3624                 $sigText = $this->getUserSig( $user );
3625                 $text = strtr( $text, array(
3626                         '~~~~~' => $d,
3627                         '~~~~' => "$sigText $d",
3628                         '~~~' => $sigText
3629                 ) );
3630
3631                 # Context links: [[|name]] and [[name (context)|]]
3632                 #
3633                 global $wgLegalTitleChars;
3634                 $tc = "[$wgLegalTitleChars]";
3635                 $nc = '[ _0-9A-Za-z\x80-\xff]'; # Namespaces can use non-ascii!
3636
3637                 $p1 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\))\\|]]/";            # [[ns:page (context)|]]
3638                 $p3 = "/\[\[(:?$nc+:|:|)($tc+?)( \\($tc+\\)|)(, $tc+|)\\|]]/";  # [[ns:page (context), context|]]
3639                 $p2 = "/\[\[\\|($tc+)]]/";                                      # [[|page]]
3640
3641                 # try $p1 first, to turn "[[A, B (C)|]]" into "[[A, B (C)|A, B]]"
3642                 $text = preg_replace( $p1, '[[\\1\\2\\3|\\2]]', $text );
3643                 $text = preg_replace( $p3, '[[\\1\\2\\3\\4|\\2]]', $text );
3644
3645                 $t = $this->mTitle->getText();
3646                 if ( preg_match( "/^($nc+:|)$tc+?( \\($tc+\\))$/", $t, $m ) ) {
3647                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3648                 } elseif ( preg_match( "/^($nc+:|)$tc+?(, $tc+|)$/", $t, $m ) && '' != "$m[1]$m[2]" ) {
3649                         $text = preg_replace( $p2, "[[$m[1]\\1$m[2]|\\1]]", $text );
3650                 } else {
3651                         # if there's no context, don't bother duplicating the title
3652                         $text = preg_replace( $p2, '[[\\1]]', $text );
3653                 }
3654
3655                 # Trim trailing whitespace
3656                 # __END__ tag allows for trailing
3657                 # whitespace to be deliberately included
3658                 $text = rtrim( $text );
3659                 $mw =& MagicWord::get( 'end' );
3660                 $mw->matchAndRemove( $text );
3661
3662                 return $text;
3663         }
3664
3665         /**
3666          * Fetch the user's signature text, if any, and normalize to
3667          * validated, ready-to-insert wikitext.
3668          *
3669          * @param User $user
3670          * @return string
3671          * @private
3672          */
3673         function getUserSig( &$user ) {
3674                 $username = $user->getName();
3675                 $nickname = $user->getOption( 'nickname' );
3676                 $nickname = $nickname === '' ? $username : $nickname;
3677
3678                 if( $user->getBoolOption( 'fancysig' ) !== false ) {
3679                         # Sig. might contain markup; validate this
3680                         if( $this->validateSig( $nickname ) !== false ) {
3681                                 # Validated; clean up (if needed) and return it
3682                                 return $this->cleanSig( $nickname, true );
3683                         } else {
3684                                 # Failed to validate; fall back to the default
3685                                 $nickname = $username;
3686                                 wfDebug( "Parser::getUserSig: $username has bad XML tags in signature.\n" );
3687                         }
3688                 }
3689
3690                 // Make sure nickname doesnt get a sig in a sig
3691                 $nickname = $this->cleanSigInSig( $nickname );
3692
3693                 # If we're still here, make it a link to the user page
3694                 $userpage = $user->getUserPage();
3695                 return( '[[' . $userpage->getPrefixedText() . '|' . wfEscapeWikiText( $nickname ) . ']]' );
3696         }
3697
3698         /**
3699          * Check that the user's signature contains no bad XML
3700          *
3701          * @param string $text
3702          * @return mixed An expanded string, or false if invalid.
3703          */
3704         function validateSig( $text ) {
3705                 return( wfIsWellFormedXmlFragment( $text ) ? $text : false );
3706         }
3707
3708         /**
3709          * Clean up signature text
3710          *
3711          * 1) Strip ~~~, ~~~~ and ~~~~~ out of signatures @see cleanSigInSig
3712          * 2) Substitute all transclusions
3713          *
3714          * @param string $text
3715          * @param $parsing Whether we're cleaning (preferences save) or parsing
3716          * @return string Signature text
3717          */
3718         function cleanSig( $text, $parsing = false ) {
3719                 global $wgTitle;
3720                 $this->startExternalParse( $wgTitle, new ParserOptions(), $parsing ? OT_WIKI : OT_MSG );
3721
3722                 $substWord = MagicWord::get( 'subst' );
3723                 $substRegex = '/\{\{(?!(?:' . $substWord->getBaseRegex() . '))/x' . $substWord->getRegexCase();
3724                 $substText = '{{' . $substWord->getSynonym( 0 );
3725
3726                 $text = preg_replace( $substRegex, $substText, $text );
3727                 $text = $this->cleanSigInSig( $text );
3728                 $text = $this->replaceVariables( $text );
3729
3730                 $this->clearState();
3731                 return $text;
3732         }
3733
3734         /**
3735          * Strip ~~~, ~~~~ and ~~~~~ out of signatures
3736          * @param string $text
3737          * @return string Signature text with /~{3,5}/ removed
3738          */
3739         function cleanSigInSig( $text ) {
3740                 $text = preg_replace( '/~{3,5}/', '', $text );
3741                 return $text;
3742         }
3743
3744         /**
3745          * Set up some variables which are usually set up in parse()
3746          * so that an external function can call some class members with confidence
3747          * @public
3748          */
3749         function startExternalParse( &$title, $options, $outputType, $clearState = true ) {
3750                 $this->mTitle =& $title;
3751                 $this->mOptions = $options;
3752                 $this->setOutputType( $outputType );
3753                 if ( $clearState ) {
3754                         $this->clearState();
3755                 }
3756         }
3757
3758         /**
3759          * Transform a MediaWiki message by replacing magic variables.
3760          *
3761          * @param string $text the text to transform
3762          * @param ParserOptions $options  options
3763          * @return string the text with variables substituted
3764          * @public
3765          */
3766         function transformMsg( $text, $options ) {
3767                 global $wgTitle;
3768                 static $executing = false;
3769
3770                 $fname = "Parser::transformMsg";
3771
3772                 # Guard against infinite recursion
3773                 if ( $executing ) {
3774                         return $text;
3775                 }
3776                 $executing = true;
3777
3778                 wfProfileIn($fname);
3779
3780                 if ( $wgTitle ) {
3781                         $this->mTitle = $wgTitle;
3782                 } else {
3783                         $this->mTitle = Title::newFromText('msg');
3784                 }
3785                 $this->mOptions = $options;
3786                 $this->setOutputType( OT_MSG );
3787                 $this->clearState();
3788                 $text = $this->replaceVariables( $text );
3789
3790                 $executing = false;
3791                 wfProfileOut($fname);
3792                 return $text;
3793         }
3794
3795         /**
3796          * Create an HTML-style tag, e.g. <yourtag>special text</yourtag>
3797          * The callback should have the following form:
3798          *    function myParserHook( $text, $params, &$parser ) { ... }
3799          *
3800          * Transform and return $text. Use $parser for any required context, e.g. use
3801          * $parser->getTitle() and $parser->getOptions() not $wgTitle or $wgOut->mParserOptions
3802          *
3803          * @public
3804          *
3805          * @param mixed $tag The tag to use, e.g. 'hook' for <hook>
3806          * @param mixed $callback The callback function (and object) to use for the tag
3807          *
3808          * @return The old value of the mTagHooks array associated with the hook
3809          */
3810         function setHook( $tag, $callback ) {
3811                 $tag = strtolower( $tag );
3812                 $oldVal = @$this->mTagHooks[$tag];
3813                 $this->mTagHooks[$tag] = $callback;
3814
3815                 return $oldVal;
3816         }
3817
3818         /**
3819          * Create a function, e.g. {{sum:1|2|3}}
3820          * The callback function should have the form:
3821          *    function myParserFunction( &$parser, $arg1, $arg2, $arg3 ) { ... }
3822          *
3823          * The callback may either return the text result of the function, or an array with the text
3824          * in element 0, and a number of flags in the other elements. The names of the flags are
3825          * specified in the keys. Valid flags are:
3826          *   found                     The text returned is valid, stop processing the template. This
3827          *                             is on by default.
3828          *   nowiki                    Wiki markup in the return value should be escaped
3829          *   noparse                   Unsafe HTML tags should not be stripped, etc.
3830          *   noargs                    Don't replace triple-brace arguments in the return value
3831          *   isHTML                    The returned text is HTML, armour it against wikitext transformation
3832          *
3833          * @public
3834          *
3835          * @param string $id The magic word ID
3836          * @param mixed $callback The callback function (and object) to use
3837          * @param integer $flags a combination of the following flags:
3838          *                SFH_NO_HASH No leading hash, i.e. {{plural:...}} instead of {{#if:...}}
3839          *
3840          * @return The old callback function for this name, if any
3841          */
3842         function setFunctionHook( $id, $callback, $flags = 0 ) {
3843                 $oldVal = @$this->mFunctionHooks[$id];
3844                 $this->mFunctionHooks[$id] = $callback;
3845
3846                 # Add to function cache
3847                 $mw = MagicWord::get( $id );
3848                 if( !$mw )
3849                         throw new MWException( 'Parser::setFunctionHook() expecting a magic word identifier.' );
3850
3851                 $synonyms = $mw->getSynonyms();
3852                 $sensitive = intval( $mw->isCaseSensitive() );
3853
3854                 foreach ( $synonyms as $syn ) {
3855                         # Case
3856                         if ( !$sensitive ) {
3857                                 $syn = strtolower( $syn );
3858                         }
3859                         # Add leading hash
3860                         if ( !( $flags & SFH_NO_HASH ) ) {
3861                                 $syn = '#' . $syn;
3862                         }
3863                         # Remove trailing colon
3864                         if ( substr( $syn, -1, 1 ) == ':' ) {
3865                                 $syn = substr( $syn, 0, -1 );
3866                         }
3867                         $this->mFunctionSynonyms[$sensitive][$syn] = $id;
3868                 }
3869                 return $oldVal;
3870         }
3871
3872         /**
3873          * Get all registered function hook identifiers
3874          *
3875          * @return array
3876          */
3877         function getFunctionHooks() {
3878                 return array_keys( $this->mFunctionHooks );
3879         }
3880
3881         /**
3882          * Replace <!--LINK--> link placeholders with actual links, in the buffer
3883          * Placeholders created in Skin::makeLinkObj()
3884          * Returns an array of links found, indexed by PDBK:
3885          *  0 - broken
3886          *  1 - normal link
3887          *  2 - stub
3888          * $options is a bit field, RLH_FOR_UPDATE to select for update
3889          */
3890         function replaceLinkHolders( &$text, $options = 0 ) {
3891                 global $wgUser;
3892                 global $wgOutputReplace;
3893                 global $wgContLang, $wgLanguageCode;
3894
3895                 $fname = 'Parser::replaceLinkHolders';
3896                 wfProfileIn( $fname );
3897
3898                 $pdbks = array();
3899                 $colours = array();
3900                 $sk =& $this->mOptions->getSkin();
3901                 $linkCache =& LinkCache::singleton();
3902
3903                 if ( !empty( $this->mLinkHolders['namespaces'] ) ) {
3904                         wfProfileIn( $fname.'-check' );
3905                         $dbr =& wfGetDB( DB_SLAVE );
3906                         $page = $dbr->tableName( 'page' );
3907                         $threshold = $wgUser->getOption('stubthreshold');
3908
3909                         # Sort by namespace
3910                         asort( $this->mLinkHolders['namespaces'] );
3911
3912                         # Generate query
3913                         $query = false;
3914                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3915                                 # Make title object
3916                                 $title = $this->mLinkHolders['titles'][$key];
3917
3918                                 # Skip invalid entries.
3919                                 # Result will be ugly, but prevents crash.
3920                                 if ( is_null( $title ) ) {
3921                                         continue;
3922                                 }
3923                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
3924
3925                                 # Check if it's a static known link, e.g. interwiki
3926                                 if ( $title->isAlwaysKnown() ) {
3927                                         $colours[$pdbk] = 1;
3928                                 } elseif ( ( $id = $linkCache->getGoodLinkID( $pdbk ) ) != 0 ) {
3929                                         $colours[$pdbk] = 1;
3930                                         $this->mOutput->addLink( $title, $id );
3931                                 } elseif ( $linkCache->isBadLink( $pdbk ) ) {
3932                                         $colours[$pdbk] = 0;
3933                                 } else {
3934                                         # Not in the link cache, add it to the query
3935                                         if ( !isset( $current ) ) {
3936                                                 $current = $ns;
3937                                                 $query =  "SELECT page_id, page_namespace, page_title";
3938                                                 if ( $threshold > 0 ) {
3939                                                         $query .= ', page_len, page_is_redirect';
3940                                                 }
3941                                                 $query .= " FROM $page WHERE (page_namespace=$ns AND page_title IN(";
3942                                         } elseif ( $current != $ns ) {
3943                                                 $current = $ns;
3944                                                 $query .= ")) OR (page_namespace=$ns AND page_title IN(";
3945                                         } else {
3946                                                 $query .= ', ';
3947                                         }
3948
3949                                         $query .= $dbr->addQuotes( $this->mLinkHolders['dbkeys'][$key] );
3950                                 }
3951                         }
3952                         if ( $query ) {
3953                                 $query .= '))';
3954                                 if ( $options & RLH_FOR_UPDATE ) {
3955                                         $query .= ' FOR UPDATE';
3956                                 }
3957
3958                                 $res = $dbr->query( $query, $fname );
3959
3960                                 # Fetch data and form into an associative array
3961                                 # non-existent = broken
3962                                 # 1 = known
3963                                 # 2 = stub
3964                                 while ( $s = $dbr->fetchObject($res) ) {
3965                                         $title = Title::makeTitle( $s->page_namespace, $s->page_title );
3966                                         $pdbk = $title->getPrefixedDBkey();
3967                                         $linkCache->addGoodLinkObj( $s->page_id, $title );
3968                                         $this->mOutput->addLink( $title, $s->page_id );
3969
3970                                         if ( $threshold >  0 ) {
3971                                                 $size = $s->page_len;
3972                                                 if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
3973                                                         $colours[$pdbk] = 1;
3974                                                 } else {
3975                                                         $colours[$pdbk] = 2;
3976                                                 }
3977                                         } else {
3978                                                 $colours[$pdbk] = 1;
3979                                         }
3980                                 }
3981                         }
3982                         wfProfileOut( $fname.'-check' );
3983
3984                         # Do a second query for different language variants of links (if needed)
3985                         if($wgContLang->hasVariants()){
3986                                 $linkBatch = new LinkBatch();
3987                                 $variantMap = array(); // maps $pdbkey_Variant => $pdbkey_original
3988
3989                                 // Add variants of links to link batch
3990                                 foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
3991                                         $title = $this->mLinkHolders['titles'][$key];
3992                                         if ( is_null( $title ) )
3993                                                 continue;
3994
3995                                         $pdbk = $title->getPrefixedDBkey();
3996
3997                                         // generate all variants of the link title text
3998                                         $allTextVariants = $wgContLang->convertLinkToAllVariants($title->getText());
3999
4000                                         // if link was not found (in first query), add all variants to query
4001                                         if ( !isset($colours[$pdbk]) ){
4002                                                 foreach($allTextVariants as $textVariant){
4003                                                         $variantTitle = Title::makeTitle( $ns, $textVariant );
4004                                                         if(is_null($variantTitle)) continue;
4005                                                         $linkBatch->addObj( $variantTitle );
4006                                                         $variantMap[$variantTitle->getPrefixedDBkey()][] = $key;
4007                                                 }
4008                                         }
4009                                 }
4010
4011
4012                                 if(!$linkBatch->isEmpty()){
4013                                         // construct query
4014                                         $titleClause = $linkBatch->constructSet('page', $dbr);
4015
4016                                         $variantQuery =  "SELECT page_id, page_namespace, page_title";
4017                                         if ( $threshold > 0 ) {
4018                                                 $variantQuery .= ', page_len, page_is_redirect';
4019                                         }
4020
4021                                         $variantQuery .= " FROM $page WHERE $titleClause";
4022                                         if ( $options & RLH_FOR_UPDATE ) {
4023                                                 $variantQuery .= ' FOR UPDATE';
4024                                         }
4025
4026                                         $varRes = $dbr->query( $variantQuery, $fname );
4027
4028                                         // for each found variants, figure out link holders and replace
4029                                         while ( $s = $dbr->fetchObject($varRes) ) {
4030
4031                                                 $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title );
4032                                                 $varPdbk = $variantTitle->getPrefixedDBkey();
4033                                                 $linkCache->addGoodLinkObj( $s->page_id, $variantTitle );
4034                                                 $this->mOutput->addLink( $variantTitle, $s->page_id );
4035
4036                                                 $holderKeys = $variantMap[$varPdbk];
4037
4038                                                 // loop over link holders
4039                                                 foreach($holderKeys as $key){
4040                                                         $title = $this->mLinkHolders['titles'][$key];
4041                                                         if ( is_null( $title ) ) continue;
4042
4043                                                         $pdbk = $title->getPrefixedDBkey();
4044
4045                                                         if(!isset($colours[$pdbk])){
4046                                                                 // found link in some of the variants, replace the link holder data
4047                                                                 $this->mLinkHolders['titles'][$key] = $variantTitle;
4048                                                                 $this->mLinkHolders['dbkeys'][$key] = $variantTitle->getDBkey();
4049
4050                                                                 // set pdbk and colour
4051                                                                 $pdbks[$key] = $varPdbk;
4052                                                                 if ( $threshold >  0 ) {
4053                                                                         $size = $s->page_len;
4054                                                                         if ( $s->page_is_redirect || $s->page_namespace != 0 || $size >= $threshold ) {
4055                                                                                 $colours[$varPdbk] = 1;
4056                                                                         } else {
4057                                                                                 $colours[$varPdbk] = 2;
4058                                                                         }
4059                                                                 }
4060                                                                 else {
4061                                                                         $colours[$varPdbk] = 1;
4062                                                                 }
4063                                                         }
4064                                                 }
4065                                         }
4066                                 }
4067                         }
4068
4069                         # Construct search and replace arrays
4070                         wfProfileIn( $fname.'-construct' );
4071                         $wgOutputReplace = array();
4072                         foreach ( $this->mLinkHolders['namespaces'] as $key => $ns ) {
4073                                 $pdbk = $pdbks[$key];
4074                                 $searchkey = "<!--LINK $key-->";
4075                                 $title = $this->mLinkHolders['titles'][$key];
4076                                 if ( empty( $colours[$pdbk] ) ) {
4077                                         $linkCache->addBadLinkObj( $title );
4078                                         $colours[$pdbk] = 0;
4079                                         $this->mOutput->addLink( $title, 0 );
4080                                         $wgOutputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
4081                                                                         $this->mLinkHolders['texts'][$key],
4082                                                                         $this->mLinkHolders['queries'][$key] );
4083                                 } elseif ( $colours[$pdbk] == 1 ) {
4084                                         $wgOutputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
4085                                                                         $this->mLinkHolders['texts'][$key],
4086                                                                         $this->mLinkHolders['queries'][$key] );
4087                                 } elseif ( $colours[$pdbk] == 2 ) {
4088                                         $wgOutputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
4089                                                                         $this->mLinkHolders['texts'][$key],
4090                                                                         $this->mLinkHolders['queries'][$key] );
4091                                 }
4092                         }
4093                         wfProfileOut( $fname.'-construct' );
4094
4095                         # Do the thing
4096                         wfProfileIn( $fname.'-replace' );
4097
4098                         $text = preg_replace_callback(
4099                                 '/(<!--LINK .*?-->)/',
4100                                 "wfOutputReplaceMatches",
4101                                 $text);
4102
4103                         wfProfileOut( $fname.'-replace' );
4104                 }
4105
4106                 # Now process interwiki link holders
4107                 # This is quite a bit simpler than internal links
4108                 if ( !empty( $this->mInterwikiLinkHolders['texts'] ) ) {
4109                         wfProfileIn( $fname.'-interwiki' );
4110                         # Make interwiki link HTML
4111                         $wgOutputReplace = array();
4112                         foreach( $this->mInterwikiLinkHolders['texts'] as $key => $link ) {
4113                                 $title = $this->mInterwikiLinkHolders['titles'][$key];
4114                                 $wgOutputReplace[$key] = $sk->makeLinkObj( $title, $link );
4115                         }
4116
4117                         $text = preg_replace_callback(
4118                                 '/<!--IWLINK (.*?)-->/',
4119                                 "wfOutputReplaceMatches",
4120                                 $text );
4121                         wfProfileOut( $fname.'-interwiki' );
4122                 }
4123
4124                 wfProfileOut( $fname );
4125                 return $colours;
4126         }
4127
4128         /**
4129          * Replace <!--LINK--> link placeholders with plain text of links
4130          * (not HTML-formatted).
4131          * @param string $text
4132          * @return string
4133          */
4134         function replaceLinkHoldersText( $text ) {
4135                 $fname = 'Parser::replaceLinkHoldersText';
4136                 wfProfileIn( $fname );
4137
4138                 $text = preg_replace_callback(
4139                         '/<!--(LINK|IWLINK) (.*?)-->/',
4140                         array( &$this, 'replaceLinkHoldersTextCallback' ),
4141                         $text );
4142
4143                 wfProfileOut( $fname );
4144                 return $text;
4145         }
4146
4147         /**
4148          * @param array $matches
4149          * @return string
4150          * @private
4151          */
4152         function replaceLinkHoldersTextCallback( $matches ) {
4153                 $type = $matches[1];
4154                 $key  = $matches[2];
4155                 if( $type == 'LINK' ) {
4156                         if( isset( $this->mLinkHolders['texts'][$key] ) ) {
4157                                 return $this->mLinkHolders['texts'][$key];
4158                         }
4159                 } elseif( $type == 'IWLINK' ) {
4160                         if( isset( $this->mInterwikiLinkHolders['texts'][$key] ) ) {
4161                                 return $this->mInterwikiLinkHolders['texts'][$key];
4162                         }
4163                 }
4164                 return $matches[0];
4165         }
4166
4167         /**
4168          * Tag hook handler for 'pre'.
4169          */
4170         function renderPreTag( $text, $attribs, $parser ) {
4171                 // Backwards-compatibility hack
4172                 $content = preg_replace( '!<nowiki>(.*?)</nowiki>!is', '\\1', $text );
4173
4174                 $attribs = Sanitizer::validateTagAttributes( $attribs, 'pre' );
4175                 return wfOpenElement( 'pre', $attribs ) .
4176                         wfEscapeHTMLTagsOnly( $content ) .
4177                         '</pre>';
4178         }
4179
4180         /**
4181          * Renders an image gallery from a text with one line per image.
4182          * text labels may be given by using |-style alternative text. E.g.
4183          *   Image:one.jpg|The number "1"
4184          *   Image:tree.jpg|A tree
4185          * given as text will return the HTML of a gallery with two images,
4186          * labeled 'The number "1"' and
4187          * 'A tree'.
4188          */
4189         function renderImageGallery( $text, $params ) {
4190                 $ig = new ImageGallery();
4191                 $ig->setShowBytes( false );
4192                 $ig->setShowFilename( false );
4193                 $ig->setParsing();
4194                 $ig->useSkin( $this->mOptions->getSkin() );
4195
4196                 if( isset( $params['caption'] ) )
4197                         $ig->setCaption( $params['caption'] );
4198
4199                 $lines = explode( "\n", $text );
4200                 foreach ( $lines as $line ) {
4201                         # match lines like these:
4202                         # Image:someimage.jpg|This is some image
4203                         preg_match( "/^([^|]+)(\\|(.*))?$/", $line, $matches );
4204                         # Skip empty lines
4205                         if ( count( $matches ) == 0 ) {
4206                                 continue;
4207                         }
4208                         $tp = Title::newFromText( $matches[1] );
4209                         $nt =& $tp;
4210                         if( is_null( $nt ) ) {
4211                                 # Bogus title. Ignore these so we don't bomb out later.
4212                                 continue;
4213                         }
4214                         if ( isset( $matches[3] ) ) {
4215                                 $label = $matches[3];
4216                         } else {
4217                                 $label = '';
4218                         }
4219
4220                         $pout = $this->parse( $label,
4221                                 $this->mTitle,
4222                                 $this->mOptions,
4223                                 false, // Strip whitespace...?
4224                                 false  // Don't clear state!
4225                         );
4226                         $html = $pout->getText();
4227
4228                         $ig->add( new Image( $nt ), $html );
4229
4230                         # Only add real images (bug #5586)
4231                         if ( $nt->getNamespace() == NS_IMAGE ) {
4232                                 $this->mOutput->addImage( $nt->getDBkey() );
4233                         }
4234                 }
4235                 return $ig->toHTML();
4236         }
4237
4238         /**
4239          * Parse image options text and use it to make an image
4240          */
4241         function makeImage( &$nt, $options ) {
4242                 global $wgUseImageResize, $wgDjvuRenderer;
4243
4244                 $align = '';
4245
4246                 # Check if the options text is of the form "options|alt text"
4247                 # Options are:
4248                 #  * thumbnail          make a thumbnail with enlarge-icon and caption, alignment depends on lang
4249                 #  * left               no resizing, just left align. label is used for alt= only
4250                 #  * right              same, but right aligned
4251                 #  * none               same, but not aligned
4252                 #  * ___px              scale to ___ pixels width, no aligning. e.g. use in taxobox
4253                 #  * center             center the image
4254                 #  * framed             Keep original image size, no magnify-button.
4255
4256                 $part = explode( '|', $options);
4257
4258                 $mwThumb  =& MagicWord::get( 'img_thumbnail' );
4259                 $mwManualThumb =& MagicWord::get( 'img_manualthumb' );
4260                 $mwLeft   =& MagicWord::get( 'img_left' );
4261                 $mwRight  =& MagicWord::get( 'img_right' );
4262                 $mwNone   =& MagicWord::get( 'img_none' );
4263                 $mwWidth  =& MagicWord::get( 'img_width' );
4264                 $mwCenter =& MagicWord::get( 'img_center' );
4265                 $mwFramed =& MagicWord::get( 'img_framed' );
4266                 $mwPage   =& MagicWord::get( 'img_page' );
4267                 $caption = '';
4268
4269                 $width = $height = $framed = $thumb = false;
4270                 $page = null;
4271                 $manual_thumb = '' ;
4272
4273                 foreach( $part as $key => $val ) {
4274                         if ( $wgUseImageResize && ! is_null( $mwThumb->matchVariableStartToEnd($val) ) ) {
4275                                 $thumb=true;
4276                         } elseif ( ! is_null( $match = $mwManualThumb->matchVariableStartToEnd($val) ) ) {
4277                                 # use manually specified thumbnail
4278                                 $thumb=true;
4279                                 $manual_thumb = $match;
4280                         } elseif ( ! is_null( $mwRight->matchVariableStartToEnd($val) ) ) {
4281                                 # remember to set an alignment, don't render immediately
4282                                 $align = 'right';
4283                         } elseif ( ! is_null( $mwLeft->matchVariableStartToEnd($val) ) ) {
4284                                 # remember to set an alignment, don't render immediately
4285                                 $align = 'left';
4286                         } elseif ( ! is_null( $mwCenter->matchVariableStartToEnd($val) ) ) {
4287                                 # remember to set an alignment, don't render immediately
4288                                 $align = 'center';
4289                         } elseif ( ! is_null( $mwNone->matchVariableStartToEnd($val) ) ) {
4290                                 # remember to set an alignment, don't render immediately
4291                                 $align = 'none';
4292                         } elseif ( isset( $wgDjvuRenderer ) && $wgDjvuRenderer
4293                                    && ! is_null( $match = $mwPage->matchVariableStartToEnd($val) ) ) {
4294                                 # Select a page in a multipage document
4295                                 $page = $match;
4296                         } elseif ( $wgUseImageResize && ! is_null( $match = $mwWidth->matchVariableStartToEnd($val) ) ) {
4297                                 wfDebug( "img_width match: $match\n" );
4298                                 # $match is the image width in pixels
4299                                 if ( preg_match( '/^([0-9]*)x([0-9]*)$/', $match, $m ) ) {
4300                                         $width = intval( $m[1] );
4301                                         $height = intval( $m[2] );
4302                                 } else {
4303                                         $width = intval($match);
4304                                 }
4305                         } elseif ( ! is_null( $mwFramed->matchVariableStartToEnd($val) ) ) {
4306                                 $framed=true;
4307                         } else {
4308                                 $caption = $val;
4309                         }
4310                 }
4311                 # Strip bad stuff out of the alt text
4312                 $alt = $this->replaceLinkHoldersText( $caption );
4313
4314                 # make sure there are no placeholders in thumbnail attributes
4315                 # that are later expanded to html- so expand them now and
4316                 # remove the tags
4317                 $alt = $this->unstrip($alt, $this->mStripState);
4318                 $alt = Sanitizer::stripAllTags( $alt );
4319
4320                 # Linker does the rest
4321                 $sk =& $this->mOptions->getSkin();
4322                 return $sk->makeImageLinkObj( $nt, $caption, $alt, $align, $width, $height, $framed, $thumb, $manual_thumb, $page );
4323         }
4324
4325         /**
4326          * Set a flag in the output object indicating that the content is dynamic and
4327          * shouldn't be cached.
4328          */
4329         function disableCache() {
4330                 wfDebug( "Parser output marked as uncacheable.\n" );
4331                 $this->mOutput->mCacheTime = -1;
4332         }
4333
4334         /**#@+
4335          * Callback from the Sanitizer for expanding items found in HTML attribute
4336          * values, so they can be safely tested and escaped.
4337          * @param string $text
4338          * @param array $args
4339          * @return string
4340          * @private
4341          */
4342         function attributeStripCallback( &$text, $args ) {
4343                 $text = $this->replaceVariables( $text, $args );
4344                 $text = $this->unstripForHTML( $text );
4345                 return $text;
4346         }
4347
4348         function unstripForHTML( $text ) {
4349                 $text = $this->unstrip( $text, $this->mStripState );
4350                 $text = $this->unstripNoWiki( $text, $this->mStripState );
4351                 return $text;
4352         }
4353         /**#@-*/
4354
4355         /**#@+
4356          * Accessor/mutator
4357          */
4358         function Title( $x = NULL ) { return wfSetVar( $this->mTitle, $x ); }
4359         function Options( $x = NULL ) { return wfSetVar( $this->mOptions, $x ); }
4360         function OutputType( $x = NULL ) { return wfSetVar( $this->mOutputType, $x ); }
4361         /**#@-*/
4362
4363         /**#@+
4364          * Accessor
4365          */
4366         function getTags() { return array_keys( $this->mTagHooks ); }
4367         /**#@-*/
4368
4369
4370         /**
4371          * Break wikitext input into sections, and either pull or replace
4372          * some particular section's text.
4373          *
4374          * External callers should use the getSection and replaceSection methods.
4375          *
4376          * @param $text Page wikitext
4377          * @param $section Numbered section. 0 pulls the text before the first
4378          *                 heading; other numbers will pull the given section
4379          *                 along with its lower-level subsections.
4380          * @param $mode One of "get" or "replace"
4381          * @param $newtext Replacement text for section data.
4382          * @return string for "get", the extracted section text.
4383          *                for "replace", the whole page with the section replaced.
4384          */
4385         private function extractSections( $text, $section, $mode, $newtext='' ) {
4386                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
4387                 # comments to be stripped as well)
4388                 $striparray = array();
4389
4390                 $oldOutputType = $this->mOutputType;
4391                 $oldOptions = $this->mOptions;
4392                 $this->mOptions = new ParserOptions();
4393                 $this->setOutputType( OT_WIKI );
4394
4395                 $striptext = $this->strip( $text, $striparray, true );
4396
4397                 $this->setOutputType( $oldOutputType );
4398                 $this->mOptions = $oldOptions;
4399
4400                 # now that we can be sure that no pseudo-sections are in the source,
4401                 # split it up by section
4402                 $uniq = preg_quote( $this->uniqPrefix(), '/' );
4403                 $comment = "(?:$uniq-!--.*?QINU)";
4404                 $secs = preg_split(
4405                 /*
4406                         "/
4407                         ^(
4408                         (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4409                         (?:
4410                                 (=+) # Should this be limited to 6?
4411                                 .+?  # Section title...
4412                                 \\2  # Ending = count must match start
4413                         |
4414                                 ^
4415                                 <h([1-6])\b.*?>
4416                                 .*?
4417                                 <\/h\\3\s*>
4418                         )
4419                         (?:$comment|<\/?noinclude>|\s+)* # Trailing whitespace ok
4420                         )$
4421                         /mix",
4422                 */
4423                         "/
4424                         (
4425                                 ^
4426                                 (?:$comment|<\/?noinclude>)* # Initial comments will be stripped
4427                                 (=+) # Should this be limited to 6?
4428                                 .+?  # Section title...
4429                                 \\2  # Ending = count must match start
4430                                 (?:$comment|<\/?noinclude>|[ \\t]+)* # Trailing whitespace ok
4431                                 $
4432                         |
4433                                 <h([1-6])\b.*?>
4434                                 .*?
4435                                 <\/h\\3\s*>
4436                         )
4437                         /mix",
4438                         $striptext, -1,
4439                         PREG_SPLIT_DELIM_CAPTURE);
4440
4441                 if( $mode == "get" ) {
4442                         if( $section == 0 ) {
4443                                 // "Section 0" returns the content before any other section.
4444                                 $rv = $secs[0];
4445                         } else {
4446                                 $rv = "";
4447                         }
4448                 } elseif( $mode == "replace" ) {
4449                         if( $section == 0 ) {
4450                                 $rv = $newtext . "\n\n";
4451                                 $remainder = true;
4452                         } else {
4453                                 $rv = $secs[0];
4454                                 $remainder = false;
4455                         }
4456                 }
4457                 $count = 0;
4458                 $sectionLevel = 0;
4459                 for( $index = 1; $index < count( $secs ); ) {
4460                         $headerLine = $secs[$index++];
4461                         if( $secs[$index] ) {
4462                                 // A wiki header
4463                                 $headerLevel = strlen( $secs[$index++] );
4464                         } else {
4465                                 // An HTML header
4466                                 $index++;
4467                                 $headerLevel = intval( $secs[$index++] );
4468                         }
4469                         $content = $secs[$index++];
4470
4471                         $count++;
4472                         if( $mode == "get" ) {
4473                                 if( $count == $section ) {
4474                                         $rv = $headerLine . $content;
4475                                         $sectionLevel = $headerLevel;
4476                                 } elseif( $count > $section ) {
4477                                         if( $sectionLevel && $headerLevel > $sectionLevel ) {
4478                                                 $rv .= $headerLine . $content;
4479                                         } else {
4480                                                 // Broke out to a higher-level section
4481                                                 break;
4482                                         }
4483                                 }
4484                         } elseif( $mode == "replace" ) {
4485                                 if( $count < $section ) {
4486                                         $rv .= $headerLine . $content;
4487                                 } elseif( $count == $section ) {
4488                                         $rv .= $newtext . "\n\n";
4489                                         $sectionLevel = $headerLevel;
4490                                 } elseif( $count > $section ) {
4491                                         if( $headerLevel <= $sectionLevel ) {
4492                                                 // Passed the section's sub-parts.
4493                                                 $remainder = true;
4494                                         }
4495                                         if( $remainder ) {
4496                                                 $rv .= $headerLine . $content;
4497                                         }
4498                                 }
4499                         }
4500                 }
4501                 # reinsert stripped tags
4502                 $rv = $this->unstrip( $rv, $striparray );
4503                 $rv = $this->unstripNoWiki( $rv, $striparray );
4504                 $rv = trim( $rv );
4505                 return $rv;
4506         }
4507
4508         /**
4509          * This function returns the text of a section, specified by a number ($section).
4510          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
4511          * the first section before any such heading (section 0).
4512          *
4513          * If a section contains subsections, these are also returned.
4514          *
4515          * @param $text String: text to look in
4516          * @param $section Integer: section number
4517          * @return string text of the requested section
4518          */
4519         function getSection( $text, $section ) {
4520                 return $this->extractSections( $text, $section, "get" );
4521         }
4522
4523         function replaceSection( $oldtext, $section, $text ) {
4524                 return $this->extractSections( $oldtext, $section, "replace", $text );
4525         }
4526
4527 }
4528
4529 /**
4530  * @todo document
4531  * @package MediaWiki
4532  */
4533 class ParserOutput
4534 {
4535         var $mText,             # The output text
4536                 $mLanguageLinks,    # List of the full text of language links, in the order they appear
4537                 $mCategories,       # Map of category names to sort keys
4538                 $mContainsOldMagic, # Boolean variable indicating if the input contained variables like {{CURRENTDAY}}
4539                 $mCacheTime,        # Time when this object was generated, or -1 for uncacheable. Used in ParserCache.
4540                 $mVersion,          # Compatibility check
4541                 $mTitleText,        # title text of the chosen language variant
4542                 $mLinks,            # 2-D map of NS/DBK to ID for the links in the document. ID=zero for broken.
4543                 $mTemplates,        # 2-D map of NS/DBK to ID for the template references. ID=zero for broken.
4544                 $mImages,           # DB keys of the images used, in the array key only
4545                 $mExternalLinks,    # External link URLs, in the key only
4546                 $mHTMLtitle,            # Display HTML title
4547                 $mSubtitle,                     # Additional subtitle
4548                 $mNewSection,           # Show a new section link?
4549                 $mNoGallery;            # No gallery on category page? (__NOGALLERY__)
4550
4551         function ParserOutput( $text = '', $languageLinks = array(), $categoryLinks = array(),
4552                 $containsOldMagic = false, $titletext = '' )
4553         {
4554                 $this->mText = $text;
4555                 $this->mLanguageLinks = $languageLinks;
4556                 $this->mCategories = $categoryLinks;
4557                 $this->mContainsOldMagic = $containsOldMagic;
4558                 $this->mCacheTime = '';
4559                 $this->mVersion = MW_PARSER_VERSION;
4560                 $this->mTitleText = $titletext;
4561                 $this->mLinks = array();
4562                 $this->mTemplates = array();
4563                 $this->mImages = array();
4564                 $this->mExternalLinks = array();
4565                 $this->mHTMLtitle = "" ;
4566                 $this->mSubtitle = "" ;
4567                 $this->mNewSection = false;
4568                 $this->mNoGallery = false;
4569         }
4570
4571         function getText()                   { return $this->mText; }
4572         function &getLanguageLinks()          { return $this->mLanguageLinks; }
4573         function getCategoryLinks()          { return array_keys( $this->mCategories ); }
4574         function &getCategories()            { return $this->mCategories; }
4575         function getCacheTime()              { return $this->mCacheTime; }
4576         function getTitleText()              { return $this->mTitleText; }
4577         function &getLinks()                 { return $this->mLinks; }
4578         function &getTemplates()             { return $this->mTemplates; }
4579         function &getImages()                { return $this->mImages; }
4580         function &getExternalLinks()         { return $this->mExternalLinks; }
4581         function getNoGallery()              { return $this->mNoGallery; }
4582         function getSubtitle()               { return $this->mSubtitle; }
4583
4584         function containsOldMagic()          { return $this->mContainsOldMagic; }
4585         function setText( $text )            { return wfSetVar( $this->mText, $text ); }
4586         function setLanguageLinks( $ll )     { return wfSetVar( $this->mLanguageLinks, $ll ); }
4587         function setCategoryLinks( $cl )     { return wfSetVar( $this->mCategories, $cl ); }
4588         function setContainsOldMagic( $com ) { return wfSetVar( $this->mContainsOldMagic, $com ); }
4589         function setCacheTime( $t )          { return wfSetVar( $this->mCacheTime, $t ); }
4590         function setTitleText( $t )          { return wfSetVar($this->mTitleText, $t); }
4591         function setSubtitle( $st )          { return wfSetVar( $this->mSubtitle, $st ); }
4592
4593         function addCategory( $c, $sort )    { $this->mCategories[$c] = $sort; }
4594         function addImage( $name )           { $this->mImages[$name] = 1; }
4595         function addLanguageLink( $t )       { $this->mLanguageLinks[] = $t; }
4596         function addExternalLink( $url )     { $this->mExternalLinks[$url] = 1; }
4597
4598         function setNewSection( $value ) {
4599                 $this->mNewSection = (bool)$value;
4600         }
4601         function getNewSection() {
4602                 return (bool)$this->mNewSection;
4603         }
4604
4605         function addLink( $title, $id = null ) {
4606                 $ns = $title->getNamespace();
4607                 $dbk = $title->getDBkey();
4608                 if ( !isset( $this->mLinks[$ns] ) ) {
4609                         $this->mLinks[$ns] = array();
4610                 }
4611                 if ( is_null( $id ) ) {
4612                         $id = $title->getArticleID();
4613                 }
4614                 $this->mLinks[$ns][$dbk] = $id;
4615         }
4616
4617         function addTemplate( $title, $id ) {
4618                 $ns = $title->getNamespace();
4619                 $dbk = $title->getDBkey();
4620                 if ( !isset( $this->mTemplates[$ns] ) ) {
4621                         $this->mTemplates[$ns] = array();
4622                 }
4623                 $this->mTemplates[$ns][$dbk] = $id;
4624         }
4625
4626         /**
4627          * Return true if this cached output object predates the global or
4628          * per-article cache invalidation timestamps, or if it comes from
4629          * an incompatible older version.
4630          *
4631          * @param string $touched the affected article's last touched timestamp
4632          * @return bool
4633          * @public
4634          */
4635         function expired( $touched ) {
4636                 global $wgCacheEpoch;
4637                 return $this->getCacheTime() == -1 || // parser says it's uncacheable
4638                        $this->getCacheTime() < $touched ||
4639                        $this->getCacheTime() <= $wgCacheEpoch ||
4640                        !isset( $this->mVersion ) ||
4641                        version_compare( $this->mVersion, MW_PARSER_VERSION, "lt" );
4642         }
4643 }
4644
4645 /**
4646  * Set options of the Parser
4647  * @todo document
4648  * @package MediaWiki
4649  */
4650 class ParserOptions
4651 {
4652         # All variables are private
4653         var $mUseTeX;                    # Use texvc to expand <math> tags
4654         var $mUseDynamicDates;           # Use DateFormatter to format dates
4655         var $mInterwikiMagic;            # Interlanguage links are removed and returned in an array
4656         var $mAllowExternalImages;       # Allow external images inline
4657         var $mAllowExternalImagesFrom;   # If not, any exception?
4658         var $mSkin;                      # Reference to the preferred skin
4659         var $mDateFormat;                # Date format index
4660         var $mEditSection;               # Create "edit section" links
4661         var $mNumberHeadings;            # Automatically number headings
4662         var $mAllowSpecialInclusion;     # Allow inclusion of special pages
4663         var $mTidy;                      # Ask for tidy cleanup
4664         var $mInterfaceMessage;          # Which lang to call for PLURAL and GRAMMAR
4665         var $mMaxIncludeSize;            # Maximum size of template expansions, in bytes
4666         var $mRemoveComments;            # Remove HTML comments. ONLY APPLIES TO PREPROCESS OPERATIONS
4667
4668         var $mUser;                      # Stored user object, just used to initialise the skin
4669
4670         function getUseTeX()                        { return $this->mUseTeX; }
4671         function getUseDynamicDates()               { return $this->mUseDynamicDates; }
4672         function getInterwikiMagic()                { return $this->mInterwikiMagic; }
4673         function getAllowExternalImages()           { return $this->mAllowExternalImages; }
4674         function getAllowExternalImagesFrom()       { return $this->mAllowExternalImagesFrom; }
4675         function getEditSection()                   { return $this->mEditSection; }
4676         function getNumberHeadings()                { return $this->mNumberHeadings; }
4677         function getAllowSpecialInclusion()         { return $this->mAllowSpecialInclusion; }
4678         function getTidy()                          { return $this->mTidy; }
4679         function getInterfaceMessage()              { return $this->mInterfaceMessage; }
4680         function getMaxIncludeSize()                { return $this->mMaxIncludeSize; }
4681         function getRemoveComments()                { return $this->mRemoveComments; }
4682
4683         function &getSkin() {
4684                 if ( !isset( $this->mSkin ) ) {
4685                         $this->mSkin = $this->mUser->getSkin();
4686                 }
4687                 return $this->mSkin;
4688         }
4689
4690         function getDateFormat() {
4691                 if ( !isset( $this->mDateFormat ) ) {
4692                         $this->mDateFormat = $this->mUser->getDatePreference();
4693                 }
4694                 return $this->mDateFormat;
4695         }
4696
4697         function setUseTeX( $x )                    { return wfSetVar( $this->mUseTeX, $x ); }
4698         function setUseDynamicDates( $x )           { return wfSetVar( $this->mUseDynamicDates, $x ); }
4699         function setInterwikiMagic( $x )            { return wfSetVar( $this->mInterwikiMagic, $x ); }
4700         function setAllowExternalImages( $x )       { return wfSetVar( $this->mAllowExternalImages, $x ); }
4701         function setAllowExternalImagesFrom( $x )   { return wfSetVar( $this->mAllowExternalImagesFrom, $x ); }
4702         function setDateFormat( $x )                { return wfSetVar( $this->mDateFormat, $x ); }
4703         function setEditSection( $x )               { return wfSetVar( $this->mEditSection, $x ); }
4704         function setNumberHeadings( $x )            { return wfSetVar( $this->mNumberHeadings, $x ); }
4705         function setAllowSpecialInclusion( $x )     { return wfSetVar( $this->mAllowSpecialInclusion, $x ); }
4706         function setTidy( $x )                      { return wfSetVar( $this->mTidy, $x); }
4707         function setSkin( &$x ) { $this->mSkin =& $x; }
4708         function setInterfaceMessage( $x )          { return wfSetVar( $this->mInterfaceMessage, $x); }
4709         function setMaxIncludeSize( $x )            { return wfSetVar( $this->mMaxIncludeSize, $x ); }
4710         function setRemoveComments( $x )            { return wfSetVar( $this->mRemoveComments, $x ); }
4711
4712         function ParserOptions( $user = null ) {
4713                 $this->initialiseFromUser( $user );
4714         }
4715
4716         /**
4717          * Get parser options
4718          * @static
4719          */
4720         static function newFromUser( $user ) {
4721                 return new ParserOptions( $user );
4722         }
4723
4724         /** Get user options */
4725         function initialiseFromUser( $userInput ) {
4726                 global $wgUseTeX, $wgUseDynamicDates, $wgInterwikiMagic, $wgAllowExternalImages;
4727                 global $wgAllowExternalImagesFrom, $wgAllowSpecialInclusion, $wgMaxArticleSize;
4728                 $fname = 'ParserOptions::initialiseFromUser';
4729                 wfProfileIn( $fname );
4730                 if ( !$userInput ) {
4731                         global $wgUser;
4732                         if ( isset( $wgUser ) ) {
4733                                 $user = $wgUser;
4734                         } else {
4735                                 $user = new User;
4736                                 $user->setLoaded( true );
4737                         }
4738                 } else {
4739                         $user =& $userInput;
4740                 }
4741
4742                 $this->mUser = $user;
4743
4744                 $this->mUseTeX = $wgUseTeX;
4745                 $this->mUseDynamicDates = $wgUseDynamicDates;
4746                 $this->mInterwikiMagic = $wgInterwikiMagic;
4747                 $this->mAllowExternalImages = $wgAllowExternalImages;
4748                 $this->mAllowExternalImagesFrom = $wgAllowExternalImagesFrom;
4749                 $this->mSkin = null; # Deferred
4750                 $this->mDateFormat = null; # Deferred
4751                 $this->mEditSection = true;
4752                 $this->mNumberHeadings = $user->getOption( 'numberheadings' );
4753                 $this->mAllowSpecialInclusion = $wgAllowSpecialInclusion;
4754                 $this->mTidy = false;
4755                 $this->mInterfaceMessage = false;
4756                 $this->mMaxIncludeSize = $wgMaxArticleSize * 1024;
4757                 $this->mRemoveComments = true;
4758                 wfProfileOut( $fname );
4759         }
4760 }
4761
4762 /**
4763  * Callback function used by Parser::replaceLinkHolders()
4764  * to substitute link placeholders.
4765  */
4766 function &wfOutputReplaceMatches( $matches ) {
4767         global $wgOutputReplace;
4768         return $wgOutputReplace[$matches[1]];
4769 }
4770
4771 /**
4772  * Return the total number of articles
4773  */
4774 function wfNumberOfArticles() {
4775         global $wgNumberOfArticles;
4776
4777         wfLoadSiteStats();
4778         return $wgNumberOfArticles;
4779 }
4780
4781 /**
4782  * Return the number of files
4783  */
4784 function wfNumberOfFiles() {
4785         $fname = 'wfNumberOfFiles';
4786
4787         wfProfileIn( $fname );
4788         $dbr =& wfGetDB( DB_SLAVE );
4789         $numImages = $dbr->selectField('site_stats', 'ss_images', array(), $fname );
4790         wfProfileOut( $fname );
4791
4792         return $numImages;
4793 }
4794
4795 /**
4796  * Return the number of user accounts
4797  * @return integer
4798  */
4799 function wfNumberOfUsers() {
4800         wfProfileIn( 'wfNumberOfUsers' );
4801         $dbr =& wfGetDB( DB_SLAVE );
4802         $count = $dbr->selectField( 'site_stats', 'ss_users', array(), 'wfNumberOfUsers' );
4803         wfProfileOut( 'wfNumberOfUsers' );
4804         return (int)$count;
4805 }
4806
4807 /**
4808  * Return the total number of pages
4809  * @return integer
4810  */
4811 function wfNumberOfPages() {
4812         wfProfileIn( 'wfNumberOfPages' );
4813         $dbr =& wfGetDB( DB_SLAVE );
4814         $count = $dbr->selectField( 'site_stats', 'ss_total_pages', array(), 'wfNumberOfPages' );
4815         wfProfileOut( 'wfNumberOfPages' );
4816         return (int)$count;
4817 }
4818
4819 /**
4820  * Return the total number of admins
4821  *
4822  * @return integer
4823  */
4824 function wfNumberOfAdmins() {
4825         static $admins = -1;
4826         wfProfileIn( 'wfNumberOfAdmins' );
4827         if( $admins == -1 ) {
4828                 $dbr =& wfGetDB( DB_SLAVE );
4829                 $admins = $dbr->selectField( 'user_groups', 'COUNT(*)', array( 'ug_group' => 'sysop' ), 'wfNumberOfAdmins' );
4830         }
4831         wfProfileOut( 'wfNumberOfAdmins' );
4832         return (int)$admins;
4833 }
4834
4835 /**
4836  * Count the number of pages in a particular namespace
4837  *
4838  * @param $ns Namespace
4839  * @return integer
4840  */
4841 function wfPagesInNs( $ns ) {
4842         static $pageCount = array();
4843         wfProfileIn( 'wfPagesInNs' );
4844         if( !isset( $pageCount[$ns] ) ) {
4845                 $dbr =& wfGetDB( DB_SLAVE );
4846                 $pageCount[$ns] = $dbr->selectField( 'page', 'COUNT(*)', array( 'page_namespace' => $ns ), 'wfPagesInNs' );
4847         }
4848         wfProfileOut( 'wfPagesInNs' );
4849         return (int)$pageCount[$ns];
4850 }
4851
4852 /**
4853  * Get various statistics from the database
4854  * @private
4855  */
4856 function wfLoadSiteStats() {
4857         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
4858         $fname = 'wfLoadSiteStats';
4859
4860         if ( -1 != $wgNumberOfArticles ) return;
4861         $dbr =& wfGetDB( DB_SLAVE );
4862         $s = $dbr->selectRow( 'site_stats',
4863                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
4864                 array( 'ss_row_id' => 1 ), $fname
4865         );
4866
4867         if ( $s === false ) {
4868                 return;
4869         } else {
4870                 $wgTotalViews = $s->ss_total_views;
4871                 $wgTotalEdits = $s->ss_total_edits;
4872                 $wgNumberOfArticles = $s->ss_good_articles;
4873         }
4874 }
4875
4876 /**
4877  * Get revision timestamp from the database considering timecorrection
4878  *
4879  * @param $id Int: page revision id
4880  * @return integer
4881  */
4882 function wfRevisionTimestamp( $id ) {
4883         global $wgContLang;
4884         $fname = 'wfRevisionTimestamp';
4885
4886         wfProfileIn( $fname );
4887         $dbr =& wfGetDB( DB_SLAVE );
4888         $timestamp = $dbr->selectField( 'revision', 'rev_timestamp',
4889                         array( 'rev_id' => $id ), __METHOD__ );
4890         $timestamp = $wgContLang->userAdjust( $timestamp );
4891         wfProfileOut( $fname );
4892
4893         return $timestamp;
4894 }
4895
4896 /**
4897  * Escape html tags
4898  * Basically replacing " > and < with HTML entities ( &quot;, &gt;, &lt;)
4899  *
4900  * @param $in String: text that might contain HTML tags.
4901  * @return string Escaped string
4902  */
4903 function wfEscapeHTMLTagsOnly( $in ) {
4904         return str_replace(
4905                 array( '"', '>', '<' ),
4906                 array( '&quot;', '&gt;', '&lt;' ),
4907                 $in );
4908 }
4909
4910 ?>