includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4 /**
   5  */
   6
   7 /**
   8  * @todo document
   9  */
  10 class OutputPage {
  11         var $mMetatags, $mKeywords;
  12         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  13         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  14         var $mSubtitle, $mRedirect, $mStatusCode;
  15         var $mLastModified, $mETag, $mCategoryLinks;
  16         var $mScripts, $mLinkColours, $mPageLinkTitle;
  17
  18         var $mSuppressQuickbar;
  19         var $mOnloadHandler;
  20         var $mDoNothing;
  21         var $mContainsOldMagic, $mContainsNewMagic;
  22         var $mIsArticleRelated;
  23         protected $mParserOptions; // lazy initialised, use parserOptions()
  24         var $mShowFeedLinks = false;
  25         var $mEnableClientCache = true;
  26         var $mArticleBodyOnly = false;
  27
  28         var $mNewSectionLink = false;
  29         var $mNoGallery = false;
  30
  31         /**
  32          * Constructor
  33          * Initialise private variables
  34          */
  35         function __construct() {
  36                 $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
  37                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  38                 $this->mRedirect = $this->mLastModified =
  39                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  40                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  41                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  42                 $this->mSuppressQuickbar = $this->mPrintable = false;
  43                 $this->mLanguageLinks = array();
  44                 $this->mCategoryLinks = array();
  45                 $this->mDoNothing = false;
  46                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  47                 $this->mParserOptions = null;
  48                 $this->mSquidMaxage = 0;
  49                 $this->mScripts = '';
  50                 $this->mHeadItems = array();
  51                 $this->mETag = false;
  52                 $this->mRevisionId = null;
  53                 $this->mNewSectionLink = false;
  54         }
  55
  56         public function redirect( $url, $responsecode = '302' ) {
  57                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  58                 $this->mRedirect = str_replace( "\n", '', $url );
  59                 $this->mRedirectCode = $responsecode;
  60         }
  61
  62         /**
  63          * Set the HTTP status code to send with the output.
  64          *
  65          * @param int $statusCode
  66          * @return nothing
  67          */
  68         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  69
  70         # To add an http-equiv meta tag, precede the name with "http:"
  71         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  72         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  73         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  74
  75         /**
  76          * Add a self-contained script tag with the given contents
  77          * @param string $script JavaScript text, no <script> tags
  78          */
  79         function addInlineScript( $script ) {
  80                 global $wgJsMimeType;
  81                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
  82         }
  83
  84         function getScript() {
  85                 return $this->mScripts . $this->getHeadItems();
  86         }
  87
  88         function getHeadItems() {
  89                 $s = '';
  90                 foreach ( $this->mHeadItems as $item ) {
  91                         $s .= $item;
  92                 }
  93                 return $s;
  94         }
  95
  96         function addHeadItem( $name, $value ) {
  97                 $this->mHeadItems[$name] = $value;
  98         }
  99
 100         function setETag($tag) { $this->mETag = $tag; }
 101         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 102         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 103
 104         function addLink( $linkarr ) {
 105                 # $linkarr should be an associative array of attributes. We'll escape on output.
 106                 array_push( $this->mLinktags, $linkarr );
 107         }
 108
 109         function addMetadataLink( $linkarr ) {
 110                 # note: buggy CC software only reads first "meta" link
 111                 static $haveMeta = false;
 112                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 113                 $this->addLink( $linkarr );
 114                 $haveMeta = true;
 115         }
 116
 117         /**
 118          * checkLastModified tells the client to use the client-cached page if
 119          * possible. If sucessful, the OutputPage is disabled so that
 120          * any future call to OutputPage->output() have no effect.
 121          *
 122          * @return bool True iff cache-ok headers was sent.
 123          */
 124         function checkLastModified ( $timestamp ) {
 125                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 126                 $fname = 'OutputPage::checkLastModified';
 127
 128                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 129                         wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
 130                         return;
 131                 }
 132                 if( !$wgCachePages ) {
 133                         wfDebug( "$fname: CACHE DISABLED\n", false );
 134                         return;
 135                 }
 136                 if( $wgUser->getOption( 'nocache' ) ) {
 137                         wfDebug( "$fname: USER DISABLED CACHE\n", false );
 138                         return;
 139                 }
 140
 141                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 142                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 143
 144                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 145                         # IE sends sizes after the date like this:
 146                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 147                         # this breaks strtotime().
 148                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 149                         $modsinceTime = strtotime( $modsince );
 150                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 151                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 152                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 153                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 154                                 # Make sure you're in a place you can leave when you call us!
 155                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 156                                 $this->mLastModified = $lastmod;
 157                                 $this->sendCacheControl();
 158                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 159                                 $this->disable();
 160
 161                                 // Don't output a compressed blob when using ob_gzhandler;
 162                                 // it's technically against HTTP spec and seems to confuse
 163                                 // Firefox when the response gets split over two packets.
 164                                 wfClearOutputBuffers();
 165
 166                                 return true;
 167                         } else {
 168                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 169                                 $this->mLastModified = $lastmod;
 170                         }
 171                 } else {
 172                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 173                         $this->mLastModified = $lastmod;
 174                 }
 175         }
 176
 177         function getPageTitleActionText () {
 178                 global $action;
 179                 switch($action) {
 180                         case 'edit':
 181                         case 'delete':
 182                         case 'protect':
 183                         case 'unprotect':
 184                         case 'watch':
 185                         case 'unwatch':
 186                                 // Display title is already customized
 187                                 return '';
 188                         case 'history':
 189                                 return wfMsg('history_short');
 190                         case 'submit':
 191                                 // FIXME: bug 2735; not correct for special pages etc
 192                                 return wfMsg('preview');
 193                         case 'info':
 194                                 return wfMsg('info_short');
 195                         default:
 196                                 return '';
 197                 }
 198         }
 199
 200         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 201         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 202         public function setPageTitle( $name ) {
 203                 global $action, $wgContLang;
 204                 $name = $wgContLang->convert($name, true);
 205                 $this->mPagetitle = $name;
 206                 if(!empty($action)) {
 207                         $taction =  $this->getPageTitleActionText();
 208                         if( !empty( $taction ) ) {
 209                                 $name .= ' - '.$taction;
 210                         }
 211                 }
 212
 213                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 214         }
 215         public function getHTMLTitle() { return $this->mHTMLtitle; }
 216         public function getPageTitle() { return $this->mPagetitle; }
 217         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 218         public function getSubtitle() { return $this->mSubtitle; }
 219         public function isArticle() { return $this->mIsarticle; }
 220         public function setPrintable() { $this->mPrintable = true; }
 221         public function isPrintable() { return $this->mPrintable; }
 222         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 223         public function isSyndicated() { return $this->mShowFeedLinks; }
 224         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 225         public function getOnloadHandler() { return $this->mOnloadHandler; }
 226         public function disable() { $this->mDoNothing = true; }
 227
 228         public function setArticleRelated( $v ) {
 229                 $this->mIsArticleRelated = $v;
 230                 if ( !$v ) {
 231                         $this->mIsarticle = false;
 232                 }
 233         }
 234         public function setArticleFlag( $v ) {
 235                 $this->mIsarticle = $v;
 236                 if ( $v ) {
 237                         $this->mIsArticleRelated = $v;
 238                 }
 239         }
 240
 241         public function isArticleRelated() { return $this->mIsArticleRelated; }
 242
 243         public function getLanguageLinks() { return $this->mLanguageLinks; }
 244         public function addLanguageLinks($newLinkArray) {
 245                 $this->mLanguageLinks += $newLinkArray;
 246         }
 247         public function setLanguageLinks($newLinkArray) {
 248                 $this->mLanguageLinks = $newLinkArray;
 249         }
 250
 251         public function getCategoryLinks() {
 252                 return $this->mCategoryLinks;
 253         }
 254
 255         /**
 256          * Add an array of categories, with names in the keys
 257          */
 258         public function addCategoryLinks($categories) {
 259                 global $wgUser, $wgContLang;
 260
 261                 if ( !is_array( $categories ) ) {
 262                         return;
 263                 }
 264                 # Add the links to the link cache in a batch
 265                 $arr = array( NS_CATEGORY => $categories );
 266                 $lb = new LinkBatch;
 267                 $lb->setArray( $arr );
 268                 $lb->execute();
 269
 270                 $sk = $wgUser->getSkin();
 271                 foreach ( $categories as $category => $unused ) {
 272                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 273                         $text = $wgContLang->convertHtml( $title->getText() );
 274                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 275                 }
 276         }
 277
 278         public function setCategoryLinks($categories) {
 279                 $this->mCategoryLinks = array();
 280                 $this->addCategoryLinks($categories);
 281         }
 282
 283         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 284         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 285
 286         public function addHTML( $text ) { $this->mBodytext .= $text; }
 287         public function clearHTML() { $this->mBodytext = ''; }
 288         public function getHTML() { return $this->mBodytext; }
 289         public function debug( $text ) { $this->mDebugtext .= $text; }
 290
 291         /* @deprecated */
 292         public function setParserOptions( $options ) {
 293                 return $this->parserOptions( $options );
 294         }
 295
 296         public function parserOptions( $options = null ) {
 297                 if ( !$this->mParserOptions ) {
 298                         $this->mParserOptions = new ParserOptions;
 299                 }
 300                 return wfSetVar( $this->mParserOptions, $options );
 301         }
 302
 303         /**
 304          * Set the revision ID which will be seen by the wiki text parser
 305          * for things such as embedded {{REVISIONID}} variable use.
 306          * @param mixed $revid an integer, or NULL
 307          * @return mixed previous value
 308          */
 309         public function setRevisionId( $revid ) {
 310                 $val = is_null( $revid ) ? null : intval( $revid );
 311                 return wfSetVar( $this->mRevisionId, $val );
 312         }
 313
 314         /**
 315          * Convert wikitext to HTML and add it to the buffer
 316          * Default assumes that the current page title will
 317          * be used.
 318          *
 319          * @param string $text
 320          * @param bool   $linestart
 321          */
 322         public function addWikiText( $text, $linestart = true ) {
 323                 global $wgTitle;
 324                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 325         }
 326
 327         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 328                 $this->addWikiTextTitle($text, $title, $linestart);
 329         }
 330
 331         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 332                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 333         }
 334
 335         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 336                 global $wgParser;
 337
 338                 $fname = 'OutputPage:addWikiTextTitle';
 339                 wfProfileIn($fname);
 340
 341                 wfIncrStats('pcache_not_possible');
 342
 343                 $popts = $this->parserOptions();
 344                 $popts->setTidy($tidy);
 345
 346                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 347                         $linestart, true, $this->mRevisionId );
 348
 349                 $this->addParserOutput( $parserOutput );
 350
 351                 wfProfileOut($fname);
 352         }
 353
 354         /**
 355          * @todo document
 356          * @param ParserOutput object &$parserOutput
 357          */
 358         public function addParserOutputNoText( &$parserOutput ) {
 359                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 360                 $this->addCategoryLinks( $parserOutput->getCategories() );
 361                 $this->mNewSectionLink = $parserOutput->getNewSection();
 362                 $this->addKeywords( $parserOutput );
 363                 if ( $parserOutput->getCacheTime() == -1 ) {
 364                         $this->enableClientCache( false );
 365                 }
 366                 if ( $parserOutput->mHTMLtitle != "" ) {
 367                         $this->mPagetitle = $parserOutput->mHTMLtitle ;
 368                 }
 369                 if ( $parserOutput->mSubtitle != '' ) {
 370                         $this->mSubtitle .= $parserOutput->mSubtitle ;
 371                 }
 372                 $this->mNoGallery = $parserOutput->getNoGallery();
 373                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 374                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 375         }
 376
 377         /**
 378          * @todo document
 379          * @param ParserOutput &$parserOutput
 380          */
 381         function addParserOutput( &$parserOutput ) {
 382                 $this->addParserOutputNoText( $parserOutput );
 383                 $text = $parserOutput->getText();
 384                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 385                 $this->addHTML( $text );
 386         }
 387
 388         /**
 389          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 390          * Saves the text into the parser cache if possible.
 391          *
 392          * @param string  $text
 393          * @param Article $article
 394          * @param bool    $cache
 395          * @deprecated Use Article::outputWikitext
 396          */
 397         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 398                 global $wgParser, $wgUser;
 399
 400                 $popts = $this->parserOptions();
 401                 $popts->setTidy(true);
 402                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 403                         $popts, true, true, $this->mRevisionId );
 404                 $popts->setTidy(false);
 405                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 406                         $parserCache =& ParserCache::singleton();
 407                         $parserCache->save( $parserOutput, $article, $wgUser );
 408                 }
 409
 410                 $this->addParserOutput( $parserOutput );
 411         }
 412
 413         /**
 414          * @deprecated use addWikiTextTidy()
 415          */
 416         public function addSecondaryWikiText( $text, $linestart = true ) {
 417                 global $wgTitle;
 418                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 419         }
 420
 421         /**
 422          * Add wikitext with tidy enabled
 423          */
 424         public function addWikiTextTidy(  $text, $linestart = true ) {
 425                 global $wgTitle;
 426                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 427         }
 428
 429
 430         /**
 431          * Add the output of a QuickTemplate to the output buffer
 432          *
 433          * @param QuickTemplate $template
 434          */
 435         public function addTemplate( &$template ) {
 436                 ob_start();
 437                 $template->execute();
 438                 $this->addHTML( ob_get_contents() );
 439                 ob_end_clean();
 440         }
 441
 442         /**
 443          * Parse wikitext and return the HTML.
 444          *
 445          * @param string $text
 446          * @param bool   $linestart Is this the start of a line?
 447          * @param bool   $interface ??
 448          */
 449         public function parse( $text, $linestart = true, $interface = false ) {
 450                 global $wgParser, $wgTitle;
 451                 $popts = $this->parserOptions();
 452                 if ( $interface) { $popts->setInterfaceMessage(true); }
 453                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 454                         $linestart, true, $this->mRevisionId );
 455                 if ( $interface) { $popts->setInterfaceMessage(false); }
 456                 return $parserOutput->getText();
 457         }
 458
 459         /**
 460          * @param Article $article
 461          * @param User    $user
 462          *
 463          * @return bool True if successful, else false.
 464          */
 465         public function tryParserCache( &$article, $user ) {
 466                 $parserCache =& ParserCache::singleton();
 467                 $parserOutput = $parserCache->get( $article, $user );
 468                 if ( $parserOutput !== false ) {
 469                         $this->addParserOutput( $parserOutput );
 470                         return true;
 471                 } else {
 472                         return false;
 473                 }
 474         }
 475
 476         /**
 477          * @param int $maxage Maximum cache time on the Squid, in seconds.
 478          */
 479         public function setSquidMaxage( $maxage ) {
 480                 $this->mSquidMaxage = $maxage;
 481         }
 482
 483         /**
 484          * Use enableClientCache(false) to force it to send nocache headers
 485          * @param $state ??
 486          */
 487         public function enableClientCache( $state ) {
 488                 return wfSetVar( $this->mEnableClientCache, $state );
 489         }
 490
 491         function uncacheableBecauseRequestvars() {
 492                 global $wgRequest;
 493                 return  $wgRequest->getText('useskin', false) === false
 494                         && $wgRequest->getText('uselang', false) === false;
 495         }
 496
 497         public function sendCacheControl() {
 498                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 499                 $fname = 'OutputPage::sendCacheControl';
 500
 501                 if ($wgUseETag && $this->mETag)
 502                         $wgRequest->response()->header("ETag: $this->mETag");
 503
 504                 # don't serve compressed data to clients who can't handle it
 505                 # maintain different caches for logged-in users and non-logged in ones
 506                 $wgRequest->response()->header( 'Vary: Accept-Encoding, Cookie' );
 507                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 508                         if( $wgUseSquid && session_id() == '' &&
 509                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 510                         {
 511                                 if ( $wgUseESI ) {
 512                                         # We'll purge the proxy cache explicitly, but require end user agents
 513                                         # to revalidate against the proxy on each visit.
 514                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 515                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 516                                         # start with a shorter timeout for initial testing
 517                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 518                                         $wgRequest->response()->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 519                                         $wgRequest->response()->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 520                                 } else {
 521                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 522                                         # to revalidate against the proxy on each visit.
 523                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 524                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 525                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 526                                         # start with a shorter timeout for initial testing
 527                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 528                                         $wgRequest->response()->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 529                                 }
 530                         } else {
 531                                 # We do want clients to cache if they can, but they *must* check for updates
 532                                 # on revisiting the page.
 533                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 534                                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 535                                 $wgRequest->response()->header( "Cache-Control: private, must-revalidate, max-age=0" );
 536                         }
 537                         if($this->mLastModified) $wgRequest->response()->header( "Last-modified: {$this->mLastModified}" );
 538                 } else {
 539                         wfDebug( "$fname: no caching **\n", false );
 540
 541                         # In general, the absence of a last modified header should be enough to prevent
 542                         # the client from using its cache. We send a few other things just to make sure.
 543                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 544                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 545                         $wgRequest->response()->header( 'Pragma: no-cache' );
 546                 }
 547         }
 548
 549         /**
 550          * Finally, all the text has been munged and accumulated into
 551          * the object, let's actually output it:
 552          */
 553         public function output() {
 554                 global $wgUser, $wgOutputEncoding, $wgRequest;
 555                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 556                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 557                 global $wgServer, $wgStyleVersion;
 558
 559                 if( $this->mDoNothing ){
 560                         return;
 561                 }
 562                 $fname = 'OutputPage::output';
 563                 wfProfileIn( $fname );
 564                 $sk = $wgUser->getSkin();
 565
 566                 if ( $wgUseAjax ) {
 567                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 568
 569                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 570
 571                         if( $wgAjaxSearch ) {
 572                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 573                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 574                         }
 575
 576                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 577                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 578                         }
 579                 }
 580
 581                 if ( '' != $this->mRedirect ) {
 582                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 583                                 # Standards require redirect URLs to be absolute
 584                                 global $wgServer;
 585                                 $this->mRedirect = $wgServer . $this->mRedirect;
 586                         }
 587                         if( $this->mRedirectCode == '301') {
 588                                 if( !$wgDebugRedirects ) {
 589                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 590                                 }
 591                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 592                         }
 593
 594                         $this->sendCacheControl();
 595
 596                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 597                         if( $wgDebugRedirects ) {
 598                                 $url = htmlspecialchars( $this->mRedirect );
 599                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 600                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 601                                 print "</body>\n</html>\n";
 602                         } else {
 603                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 604                         }
 605                         wfProfileOut( $fname );
 606                         return;
 607                 }
 608                 elseif ( $this->mStatusCode )
 609                 {
 610                         $statusMessage = array(
 611                                 100 => 'Continue',
 612                                 101 => 'Switching Protocols',
 613                                 102 => 'Processing',
 614                                 200 => 'OK',
 615                                 201 => 'Created',
 616                                 202 => 'Accepted',
 617                                 203 => 'Non-Authoritative Information',
 618                                 204 => 'No Content',
 619                                 205 => 'Reset Content',
 620                                 206 => 'Partial Content',
 621                                 207 => 'Multi-Status',
 622                                 300 => 'Multiple Choices',
 623                                 301 => 'Moved Permanently',
 624                                 302 => 'Found',
 625                                 303 => 'See Other',
 626                                 304 => 'Not Modified',
 627                                 305 => 'Use Proxy',
 628                                 307 => 'Temporary Redirect',
 629                                 400 => 'Bad Request',
 630                                 401 => 'Unauthorized',
 631                                 402 => 'Payment Required',
 632                                 403 => 'Forbidden',
 633                                 404 => 'Not Found',
 634                                 405 => 'Method Not Allowed',
 635                                 406 => 'Not Acceptable',
 636                                 407 => 'Proxy Authentication Required',
 637                                 408 => 'Request Timeout',
 638                                 409 => 'Conflict',
 639                                 410 => 'Gone',
 640                                 411 => 'Length Required',
 641                                 412 => 'Precondition Failed',
 642                                 413 => 'Request Entity Too Large',
 643                                 414 => 'Request-URI Too Large',
 644                                 415 => 'Unsupported Media Type',
 645                                 416 => 'Request Range Not Satisfiable',
 646                                 417 => 'Expectation Failed',
 647                                 422 => 'Unprocessable Entity',
 648                                 423 => 'Locked',
 649                                 424 => 'Failed Dependency',
 650                                 500 => 'Internal Server Error',
 651                                 501 => 'Not Implemented',
 652                                 502 => 'Bad Gateway',
 653                                 503 => 'Service Unavailable',
 654                                 504 => 'Gateway Timeout',
 655                                 505 => 'HTTP Version Not Supported',
 656                                 507 => 'Insufficient Storage'
 657                         );
 658
 659                         if ( $statusMessage[$this->mStatusCode] )
 660                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 661                 }
 662
 663                 # Buffer output; final headers may depend on later processing
 664                 ob_start();
 665
 666                 # Disable temporary placeholders, so that the skin produces HTML
 667                 $sk->postParseLinkColour( false );
 668
 669                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 670                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 671
 672                 if ($this->mArticleBodyOnly) {
 673                         $this->out($this->mBodytext);
 674                 } else {
 675                         wfProfileIn( 'Output-skin' );
 676                         $sk->outputPage( $this );
 677                         wfProfileOut( 'Output-skin' );
 678                 }
 679
 680                 $this->sendCacheControl();
 681                 ob_end_flush();
 682                 wfProfileOut( $fname );
 683         }
 684
 685         /**
 686          * @todo document
 687          * @param string $ins
 688          */
 689         public function out( $ins ) {
 690                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 691                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 692                         $outs = $ins;
 693                 } else {
 694                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 695                         if ( false === $outs ) { $outs = $ins; }
 696                 }
 697                 print $outs;
 698         }
 699
 700         /**
 701          * @todo document
 702          */
 703         public static function setEncodings() {
 704                 global $wgInputEncoding, $wgOutputEncoding;
 705                 global $wgUser, $wgContLang;
 706
 707                 $wgInputEncoding = strtolower( $wgInputEncoding );
 708
 709                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 710                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 711                         return;
 712                 }
 713                 $wgOutputEncoding = $wgInputEncoding;
 714         }
 715
 716         /**
 717          * Deprecated, use wfReportTime() instead.
 718          * @return string
 719          * @deprecated
 720          */
 721         public function reportTime() {
 722                 $time = wfReportTime();
 723                 return $time;
 724         }
 725
 726         /**
 727          * Produce a "user is blocked" page.
 728          *
 729          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 730          * @return nothing
 731          */
 732         function blockedPage( $return = true ) {
 733                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 734
 735                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 736                 $this->setRobotpolicy( 'noindex,nofollow' );
 737                 $this->setArticleRelated( false );
 738
 739                 $id = $wgUser->blockedBy();
 740                 $reason = $wgUser->blockedFor();
 741                 $ip = wfGetIP();
 742
 743                 if ( is_numeric( $id ) ) {
 744                         $name = User::whoIs( $id );
 745                 } else {
 746                         $name = $id;
 747                 }
 748                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 749
 750                 $blockid = $wgUser->mBlock->mId;
 751
 752                 $blockExpiry = $wgUser->mBlock->mExpiry;
 753                 if ( $blockExpiry == 'infinity' ) {
 754                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 755                         // Search for localization in 'ipboptions'
 756                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 757                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 758                                 if ( strpos( $option, ":" ) === false )
 759                                         continue;
 760                                 list( $show, $value ) = explode( ":", $option );
 761                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 762                                         $blockExpiry = $show;
 763                                         break;
 764                                 }
 765                         }
 766                 } else {
 767                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 768                 }
 769
 770                 if ( $wgUser->mBlock->mAuto ) {
 771                         $msg = 'autoblockedtext';
 772                 } else {
 773                         $msg = 'blockedtext';
 774                 }
 775
 776                 $this->addWikiText( wfMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry ) );
 777
 778                 # Don't auto-return to special pages
 779                 if( $return ) {
 780                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 781                         $this->returnToMain( false, $return );
 782                 }
 783         }
 784
 785         /**
 786          * Outputs a pretty page to explain why the request exploded.
 787          *
 788          * @param string $title Message key for page title.
 789          * @param string $msg   Message key for page text.
 790          * @return nothing
 791          */
 792         public function showErrorPage( $title, $msg ) {
 793                 global $wgTitle;
 794
 795                 $this->mDebugtext .= 'Original title: ' .
 796                   $wgTitle->getPrefixedText() . "\n";
 797                 $this->setPageTitle( wfMsg( $title ) );
 798                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 799                 $this->setRobotpolicy( 'noindex,nofollow' );
 800                 $this->setArticleRelated( false );
 801                 $this->enableClientCache( false );
 802                 $this->mRedirect = '';
 803
 804                 $this->mBodytext = '';
 805                 $this->addWikiText( wfMsg( $msg ) );
 806                 $this->returnToMain( false );
 807         }
 808
 809         /** @deprecated */
 810         public function errorpage( $title, $msg ) {
 811                 throw new ErrorPageError( $title, $msg );
 812         }
 813
 814         /**
 815          * Display an error page indicating that a given version of MediaWiki is
 816          * required to use it
 817          *
 818          * @param mixed $version The version of MediaWiki needed to use the page
 819          */
 820         public function versionRequired( $version ) {
 821                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 822                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 823                 $this->setRobotpolicy( 'noindex,nofollow' );
 824                 $this->setArticleRelated( false );
 825                 $this->mBodytext = '';
 826
 827                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 828                 $this->returnToMain();
 829         }
 830
 831         /**
 832          * Display an error page noting that a given permission bit is required.
 833          *
 834          * @param string $permission key required
 835          */
 836         public function permissionRequired( $permission ) {
 837                 global $wgGroupPermissions, $wgUser;
 838
 839                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 840                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 841                 $this->setRobotpolicy( 'noindex,nofollow' );
 842                 $this->setArticleRelated( false );
 843                 $this->mBodytext = '';
 844
 845                 $groups = array();
 846                 foreach( $wgGroupPermissions as $key => $value ) {
 847                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 848                                 $groupName = User::getGroupName( $key );
 849                                 $groupPage = User::getGroupPage( $key );
 850                                 if( $groupPage ) {
 851                                         $skin = $wgUser->getSkin();
 852                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
 853                                 } else {
 854                                         $groups[] = $groupName;
 855                                 }
 856                         }
 857                 }
 858                 $n = count( $groups );
 859                 $groups = implode( ', ', $groups );
 860                 switch( $n ) {
 861                         case 0:
 862                         case 1:
 863                         case 2:
 864                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 865                                 break;
 866                         default:
 867                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 868                 }
 869                 $this->addHtml( $message );
 870                 $this->returnToMain( false );
 871         }
 872
 873         /**
 874          * Use permissionRequired.
 875          * @deprecated
 876          */
 877         public function sysopRequired() {
 878                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 879         }
 880
 881         /**
 882          * Use permissionRequired.
 883          * @deprecated
 884          */
 885         public function developerRequired() {
 886                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 887         }
 888
 889         /**
 890          * Produce the stock "please login to use the wiki" page
 891          */
 892         public function loginToUse() {
 893                 global $wgUser, $wgTitle, $wgContLang;
 894
 895                 if( $wgUser->isLoggedIn() ) {
 896                         $this->permissionRequired( 'read' );
 897                         return;
 898                 }
 899
 900                 $skin = $wgUser->getSkin();
 901
 902                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 903                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
 904                 $this->setRobotPolicy( 'noindex,nofollow' );
 905                 $this->setArticleFlag( false );
 906
 907                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
 908                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
 909                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
 910                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
 911
 912                 # Don't return to the main page if the user can't read it
 913                 # otherwise we'll end up in a pointless loop
 914                 $mainPage = Title::newMainPage();
 915                 if( $mainPage->userCanRead() )
 916                         $this->returnToMain( true, $mainPage );
 917         }
 918
 919         /** @deprecated */
 920         public function databaseError( $fname, $sql, $error, $errno ) {
 921                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
 922         }
 923
 924         /**
 925          * @todo document
 926          * @param bool  $protected Is the reason the page can't be reached because it's protected?
 927          * @param mixed $source
 928          */
 929         public function readOnlyPage( $source = null, $protected = false ) {
 930                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 931                 $skin = $wgUser->getSkin();
 932
 933                 $this->setRobotpolicy( 'noindex,nofollow' );
 934                 $this->setArticleRelated( false );
 935
 936                 if( $protected ) {
 937                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 938                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 939
 940                         list( $cascadeSources, /* $restrictions */ ) = $wgTitle->getCascadeProtectionSources();
 941
 942                         # Determine if protection is due to the page being a system message
 943                         # and show an appropriate explanation
 944                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 945                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 946                         } if ( $cascadeSources && count($cascadeSources) > 0 ) {
 947                                 $titles = '';
 948
 949                                 foreach ( $cascadeSources as $title ) {
 950                                         $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 951                                 }
 952
 953                                 $notice = wfMsgExt( 'cascadeprotected', array('parsemag'), count($cascadeSources) ) . "\n$titles";
 954
 955                                 $this->addWikiText( $notice );
 956                         } else {
 957                                 $this->addWikiText( wfMsg( 'protectedpagetext' ) );
 958                         }
 959                 } else {
 960                         $this->setPageTitle( wfMsg( 'readonly' ) );
 961                         if ( $wgReadOnly ) {
 962                                 $reason = $wgReadOnly;
 963                         } else {
 964                                 $reason = file_get_contents( $wgReadOnlyFile );
 965                         }
 966                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 967                 }
 968
 969                 if( is_string( $source ) ) {
 970                         $this->addWikiText( wfMsg( 'viewsourcetext' ) );
 971                         $rows = $wgUser->getIntOption( 'rows' );
 972                         $cols = $wgUser->getIntOption( 'cols' );
 973                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
 974                                 htmlspecialchars( $source ) . "\n</textarea>";
 975                         $this->addHTML( $text );
 976                 }
 977                 $article = new Article($wgTitle);
 978                 $this->addHTML( $skin->formatTemplates($article->getUsedTemplates()) );
 979
 980                 $this->returnToMain( false );
 981         }
 982
 983         /** @deprecated */
 984         public function fatalError( $message ) {
 985                 throw new FatalError( $message );
 986         }
 987
 988         /** @deprecated */
 989         public function unexpectedValueError( $name, $val ) {
 990                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
 991         }
 992
 993         /** @deprecated */
 994         public function fileCopyError( $old, $new ) {
 995                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
 996         }
 997
 998         /** @deprecated */
 999         public function fileRenameError( $old, $new ) {
1000                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1001         }
1002
1003         /** @deprecated */
1004         public function fileDeleteError( $name ) {
1005                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1006         }
1007
1008         /** @deprecated */
1009         public function fileNotFoundError( $name ) {
1010                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1011         }
1012
1013         public function showFatalError( $message ) {
1014                 $this->setPageTitle( wfMsg( "internalerror" ) );
1015                 $this->setRobotpolicy( "noindex,nofollow" );
1016                 $this->setArticleRelated( false );
1017                 $this->enableClientCache( false );
1018                 $this->mRedirect = '';
1019                 $this->mBodytext = $message;
1020         }
1021
1022         public function showUnexpectedValueError( $name, $val ) {
1023                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1024         }
1025
1026         public function showFileCopyError( $old, $new ) {
1027                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1028         }
1029
1030         public function showFileRenameError( $old, $new ) {
1031                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1032         }
1033
1034         public function showFileDeleteError( $name ) {
1035                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1036         }
1037
1038         public function showFileNotFoundError( $name ) {
1039                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1040         }
1041
1042         /**
1043          * return from error messages or notes
1044          * @param $auto automatically redirect the user after 10 seconds
1045          * @param $returnto page title to return to. Default is Main Page.
1046          */
1047         public function returnToMain( $auto = true, $returnto = NULL ) {
1048                 global $wgUser, $wgOut, $wgRequest;
1049
1050                 if ( $returnto == NULL ) {
1051                         $returnto = $wgRequest->getText( 'returnto' );
1052                 }
1053
1054                 if ( '' === $returnto ) {
1055                         $returnto = Title::newMainPage();
1056                 }
1057
1058                 if ( is_object( $returnto ) ) {
1059                         $titleObj = $returnto;
1060                 } else {
1061                         $titleObj = Title::newFromText( $returnto );
1062                 }
1063                 if ( !is_object( $titleObj ) ) {
1064                         $titleObj = Title::newMainPage();
1065                 }
1066
1067                 $sk = $wgUser->getSkin();
1068                 $link = $sk->makeLinkObj( $titleObj, '' );
1069
1070                 $r = wfMsg( 'returnto', $link );
1071                 if ( $auto ) {
1072                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
1073                 }
1074                 $wgOut->addHTML( "\n<p>$r</p>\n" );
1075         }
1076
1077         /**
1078          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1079          * and uses the first 10 of them for META keywords
1080          *
1081          * @param ParserOutput &$parserOutput
1082          */
1083         private function addKeywords( &$parserOutput ) {
1084                 global $wgTitle;
1085                 $this->addKeyword( $wgTitle->getPrefixedText() );
1086                 $count = 1;
1087                 $links2d =& $parserOutput->getLinks();
1088                 if ( !is_array( $links2d ) ) {
1089                         return;
1090                 }
1091                 foreach ( $links2d as $dbkeys ) {
1092                         foreach( $dbkeys as $dbkey => $unused ) {
1093                                 $this->addKeyword( $dbkey );
1094                                 if ( ++$count > 10 ) {
1095                                         break 2;
1096                                 }
1097                         }
1098                 }
1099         }
1100
1101         /**
1102          * @return string The doctype, opening <html>, and head element.
1103          */
1104         public function headElement() {
1105                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1106                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1107                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1108
1109                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1110                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1111                 } else {
1112                         $ret = '';
1113                 }
1114
1115                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1116
1117                 if ( '' == $this->getHTMLTitle() ) {
1118                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1119                 }
1120
1121                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1122                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1123                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1124                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1125                 }
1126                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1127                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1128                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1129
1130                 $ret .= $this->getHeadLinks();
1131                 global $wgStylePath;
1132                 if( $this->isPrintable() ) {
1133                         $media = '';
1134                 } else {
1135                         $media = "media='print'";
1136                 }
1137                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1138                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1139
1140                 $sk = $wgUser->getSkin();
1141                 $ret .= $sk->getHeadScripts();
1142                 $ret .= $this->mScripts;
1143                 $ret .= $sk->getUserStyles();
1144                 $ret .= $this->getHeadItems();
1145
1146                 if ($wgUseTrackbacks && $this->isArticleRelated())
1147                         $ret .= $wgTitle->trackbackRDF();
1148
1149                 $ret .= "</head>\n";
1150                 return $ret;
1151         }
1152
1153         /**
1154          * @return string HTML tag links to be put in the header.
1155          */
1156         public function getHeadLinks() {
1157                 global $wgRequest;
1158                 $ret = '';
1159                 foreach ( $this->mMetatags as $tag ) {
1160                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1161                                 $a = 'http-equiv';
1162                                 $tag[0] = substr( $tag[0], 5 );
1163                         } else {
1164                                 $a = 'name';
1165                         }
1166                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1167                 }
1168
1169                 $p = $this->mRobotpolicy;
1170                 if( $p !== '' && $p != 'index,follow' ) {
1171                         // http://www.robotstxt.org/wc/meta-user.html
1172                         // Only show if it's different from the default robots policy
1173                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1174                 }
1175
1176                 if ( count( $this->mKeywords ) > 0 ) {
1177                         $strip = array(
1178                                 "/<.*?>/" => '',
1179                                 "/_/" => ' '
1180                         );
1181                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1182                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1183                 }
1184                 foreach ( $this->mLinktags as $tag ) {
1185                         $ret .= "\t\t<link";
1186                         foreach( $tag as $attr => $val ) {
1187                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1188                         }
1189                         $ret .= " />\n";
1190                 }
1191                 if( $this->isSyndicated() ) {
1192                         # FIXME: centralize the mime-type and name information in Feed.php
1193                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1194                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1195                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1196                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 1.0' href='$link' />\n";
1197                 }
1198
1199                 return $ret;
1200         }
1201
1202         /**
1203          * Turn off regular page output and return an error reponse
1204          * for when rate limiting has triggered.
1205          * @todo i18n
1206          */
1207         public function rateLimited() {
1208                 global $wgOut;
1209                 $wgOut->disable();
1210                 wfHttpError( 500, 'Internal Server Error',
1211                         'Sorry, the server has encountered an internal error. ' .
1212                         'Please wait a moment and hit "refresh" to submit the request again.' );
1213         }
1214
1215         /**
1216          * Show an "add new section" link?
1217          *
1218          * @return bool True if the parser output instructs us to add one
1219          */
1220         public function showNewSectionLink() {
1221                 return $this->mNewSectionLink;
1222         }
1223 }
1224 ?>