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 $mAllowUserJs;
  19         var $mSuppressQuickbar;
  20         var $mOnloadHandler;
  21         var $mDoNothing;
  22         var $mContainsOldMagic, $mContainsNewMagic;
  23         var $mIsArticleRelated;
  24         protected $mParserOptions; // lazy initialised, use parserOptions()
  25         var $mShowFeedLinks = false;
  26         var $mEnableClientCache = true;
  27         var $mArticleBodyOnly = false;
  28
  29         var $mNewSectionLink = false;
  30         var $mNoGallery = false;
  31
  32         /**
  33          * Constructor
  34          * Initialise private variables
  35          */
  36         function __construct() {
  37                 global $wgAllowUserJs;
  38                 $this->mAllowUserJs = $wgAllowUserJs;
  39                 $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
  40                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  41                 $this->mRedirect = $this->mLastModified =
  42                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  43                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  44                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  45                 $this->mSuppressQuickbar = $this->mPrintable = false;
  46                 $this->mLanguageLinks = array();
  47                 $this->mCategoryLinks = array();
  48                 $this->mDoNothing = false;
  49                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  50                 $this->mParserOptions = null;
  51                 $this->mSquidMaxage = 0;
  52                 $this->mScripts = '';
  53                 $this->mHeadItems = array();
  54                 $this->mETag = false;
  55                 $this->mRevisionId = null;
  56                 $this->mNewSectionLink = false;
  57         }
  58
  59         public function redirect( $url, $responsecode = '302' ) {
  60                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  61                 $this->mRedirect = str_replace( "\n", '', $url );
  62                 $this->mRedirectCode = $responsecode;
  63         }
  64
  65         /**
  66          * Set the HTTP status code to send with the output.
  67          *
  68          * @param int $statusCode
  69          * @return nothing
  70          */
  71         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  72
  73         # To add an http-equiv meta tag, precede the name with "http:"
  74         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  75         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  76         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  77
  78         /**
  79          * Add a self-contained script tag with the given contents
  80          * @param string $script JavaScript text, no <script> tags
  81          */
  82         function addInlineScript( $script ) {
  83                 global $wgJsMimeType;
  84                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
  85         }
  86
  87         function getScript() {
  88                 return $this->mScripts . $this->getHeadItems();
  89         }
  90
  91         function getHeadItems() {
  92                 $s = '';
  93                 foreach ( $this->mHeadItems as $item ) {
  94                         $s .= $item;
  95                 }
  96                 return $s;
  97         }
  98
  99         function addHeadItem( $name, $value ) {
 100                 $this->mHeadItems[$name] = $value;
 101         }
 102
 103         function setETag($tag) { $this->mETag = $tag; }
 104         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 105         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 106
 107         function addLink( $linkarr ) {
 108                 # $linkarr should be an associative array of attributes. We'll escape on output.
 109                 array_push( $this->mLinktags, $linkarr );
 110         }
 111
 112         function addMetadataLink( $linkarr ) {
 113                 # note: buggy CC software only reads first "meta" link
 114                 static $haveMeta = false;
 115                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 116                 $this->addLink( $linkarr );
 117                 $haveMeta = true;
 118         }
 119
 120         /**
 121          * checkLastModified tells the client to use the client-cached page if
 122          * possible. If sucessful, the OutputPage is disabled so that
 123          * any future call to OutputPage->output() have no effect.
 124          *
 125          * @return bool True iff cache-ok headers was sent.
 126          */
 127         function checkLastModified ( $timestamp ) {
 128                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 129                 $fname = 'OutputPage::checkLastModified';
 130
 131                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 132                         wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
 133                         return;
 134                 }
 135                 if( !$wgCachePages ) {
 136                         wfDebug( "$fname: CACHE DISABLED\n", false );
 137                         return;
 138                 }
 139                 if( $wgUser->getOption( 'nocache' ) ) {
 140                         wfDebug( "$fname: USER DISABLED CACHE\n", false );
 141                         return;
 142                 }
 143
 144                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 145                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 146
 147                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 148                         # IE sends sizes after the date like this:
 149                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 150                         # this breaks strtotime().
 151                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 152                         $modsinceTime = strtotime( $modsince );
 153                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 154                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 155                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 156                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 157                                 # Make sure you're in a place you can leave when you call us!
 158                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 159                                 $this->mLastModified = $lastmod;
 160                                 $this->sendCacheControl();
 161                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 162                                 $this->disable();
 163
 164                                 // Don't output a compressed blob when using ob_gzhandler;
 165                                 // it's technically against HTTP spec and seems to confuse
 166                                 // Firefox when the response gets split over two packets.
 167                                 wfClearOutputBuffers();
 168
 169                                 return true;
 170                         } else {
 171                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 172                                 $this->mLastModified = $lastmod;
 173                         }
 174                 } else {
 175                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 176                         $this->mLastModified = $lastmod;
 177                 }
 178         }
 179
 180         function getPageTitleActionText () {
 181                 global $action;
 182                 switch($action) {
 183                         case 'edit':
 184                         case 'delete':
 185                         case 'protect':
 186                         case 'unprotect':
 187                         case 'watch':
 188                         case 'unwatch':
 189                                 // Display title is already customized
 190                                 return '';
 191                         case 'history':
 192                                 return wfMsg('history_short');
 193                         case 'submit':
 194                                 // FIXME: bug 2735; not correct for special pages etc
 195                                 return wfMsg('preview');
 196                         case 'info':
 197                                 return wfMsg('info_short');
 198                         default:
 199                                 return '';
 200                 }
 201         }
 202
 203         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 204         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 205         public function setPageTitle( $name ) {
 206                 global $action, $wgContLang;
 207                 $name = $wgContLang->convert($name, true);
 208                 $this->mPagetitle = $name;
 209                 if(!empty($action)) {
 210                         $taction =  $this->getPageTitleActionText();
 211                         if( !empty( $taction ) ) {
 212                                 $name .= ' - '.$taction;
 213                         }
 214                 }
 215
 216                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 217         }
 218         public function getHTMLTitle() { return $this->mHTMLtitle; }
 219         public function getPageTitle() { return $this->mPagetitle; }
 220         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 221         public function getSubtitle() { return $this->mSubtitle; }
 222         public function isArticle() { return $this->mIsarticle; }
 223         public function setPrintable() { $this->mPrintable = true; }
 224         public function isPrintable() { return $this->mPrintable; }
 225         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 226         public function isSyndicated() { return $this->mShowFeedLinks; }
 227         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 228         public function getOnloadHandler() { return $this->mOnloadHandler; }
 229         public function disable() { $this->mDoNothing = true; }
 230
 231         public function setArticleRelated( $v ) {
 232                 $this->mIsArticleRelated = $v;
 233                 if ( !$v ) {
 234                         $this->mIsarticle = false;
 235                 }
 236         }
 237         public function setArticleFlag( $v ) {
 238                 $this->mIsarticle = $v;
 239                 if ( $v ) {
 240                         $this->mIsArticleRelated = $v;
 241                 }
 242         }
 243
 244         public function isArticleRelated() { return $this->mIsArticleRelated; }
 245
 246         public function getLanguageLinks() { return $this->mLanguageLinks; }
 247         public function addLanguageLinks($newLinkArray) {
 248                 $this->mLanguageLinks += $newLinkArray;
 249         }
 250         public function setLanguageLinks($newLinkArray) {
 251                 $this->mLanguageLinks = $newLinkArray;
 252         }
 253
 254         public function getCategoryLinks() {
 255                 return $this->mCategoryLinks;
 256         }
 257
 258         /**
 259          * Add an array of categories, with names in the keys
 260          */
 261         public function addCategoryLinks($categories) {
 262                 global $wgUser, $wgContLang;
 263
 264                 if ( !is_array( $categories ) ) {
 265                         return;
 266                 }
 267                 # Add the links to the link cache in a batch
 268                 $arr = array( NS_CATEGORY => $categories );
 269                 $lb = new LinkBatch;
 270                 $lb->setArray( $arr );
 271                 $lb->execute();
 272
 273                 $sk = $wgUser->getSkin();
 274                 foreach ( $categories as $category => $unused ) {
 275                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 276                         $text = $wgContLang->convertHtml( $title->getText() );
 277                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 278                 }
 279         }
 280
 281         public function setCategoryLinks($categories) {
 282                 $this->mCategoryLinks = array();
 283                 $this->addCategoryLinks($categories);
 284         }
 285
 286         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 287         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 288
 289         public function disallowUserJs() { $this->mAllowUserJs = false; }
 290         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 291
 292         public function addHTML( $text ) { $this->mBodytext .= $text; }
 293         public function clearHTML() { $this->mBodytext = ''; }
 294         public function getHTML() { return $this->mBodytext; }
 295         public function debug( $text ) { $this->mDebugtext .= $text; }
 296
 297         /* @deprecated */
 298         public function setParserOptions( $options ) {
 299                 return $this->parserOptions( $options );
 300         }
 301
 302         public function parserOptions( $options = null ) {
 303                 if ( !$this->mParserOptions ) {
 304                         $this->mParserOptions = new ParserOptions;
 305                 }
 306                 return wfSetVar( $this->mParserOptions, $options );
 307         }
 308
 309         /**
 310          * Set the revision ID which will be seen by the wiki text parser
 311          * for things such as embedded {{REVISIONID}} variable use.
 312          * @param mixed $revid an integer, or NULL
 313          * @return mixed previous value
 314          */
 315         public function setRevisionId( $revid ) {
 316                 $val = is_null( $revid ) ? null : intval( $revid );
 317                 return wfSetVar( $this->mRevisionId, $val );
 318         }
 319
 320         /**
 321          * Convert wikitext to HTML and add it to the buffer
 322          * Default assumes that the current page title will
 323          * be used.
 324          *
 325          * @param string $text
 326          * @param bool   $linestart
 327          */
 328         public function addWikiText( $text, $linestart = true ) {
 329                 global $wgTitle;
 330                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 331         }
 332
 333         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 334                 $this->addWikiTextTitle($text, $title, $linestart);
 335         }
 336
 337         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 338                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 339         }
 340
 341         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 342                 global $wgParser;
 343
 344                 $fname = 'OutputPage:addWikiTextTitle';
 345                 wfProfileIn($fname);
 346
 347                 wfIncrStats('pcache_not_possible');
 348
 349                 $popts = $this->parserOptions();
 350                 $popts->setTidy($tidy);
 351
 352                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 353                         $linestart, true, $this->mRevisionId );
 354
 355                 $this->addParserOutput( $parserOutput );
 356
 357                 wfProfileOut($fname);
 358         }
 359
 360         /**
 361          * @todo document
 362          * @param ParserOutput object &$parserOutput
 363          */
 364         public function addParserOutputNoText( &$parserOutput ) {
 365                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 366                 $this->addCategoryLinks( $parserOutput->getCategories() );
 367                 $this->mNewSectionLink = $parserOutput->getNewSection();
 368                 $this->addKeywords( $parserOutput );
 369                 if ( $parserOutput->getCacheTime() == -1 ) {
 370                         $this->enableClientCache( false );
 371                 }
 372                 if ( $parserOutput->mHTMLtitle != "" ) {
 373                         $this->mPagetitle = $parserOutput->mHTMLtitle ;
 374                 }
 375                 if ( $parserOutput->mSubtitle != '' ) {
 376                         $this->mSubtitle .= $parserOutput->mSubtitle ;
 377                 }
 378                 $this->mNoGallery = $parserOutput->getNoGallery();
 379                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 380                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 381         }
 382
 383         /**
 384          * @todo document
 385          * @param ParserOutput &$parserOutput
 386          */
 387         function addParserOutput( &$parserOutput ) {
 388                 $this->addParserOutputNoText( $parserOutput );
 389                 $text = $parserOutput->getText();
 390                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 391                 $this->addHTML( $text );
 392         }
 393
 394         /**
 395          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 396          * Saves the text into the parser cache if possible.
 397          *
 398          * @param string  $text
 399          * @param Article $article
 400          * @param bool    $cache
 401          * @deprecated Use Article::outputWikitext
 402          */
 403         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 404                 global $wgParser, $wgUser;
 405
 406                 $popts = $this->parserOptions();
 407                 $popts->setTidy(true);
 408                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 409                         $popts, true, true, $this->mRevisionId );
 410                 $popts->setTidy(false);
 411                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 412                         $parserCache =& ParserCache::singleton();
 413                         $parserCache->save( $parserOutput, $article, $wgUser );
 414                 }
 415
 416                 $this->addParserOutput( $parserOutput );
 417         }
 418
 419         /**
 420          * @deprecated use addWikiTextTidy()
 421          */
 422         public function addSecondaryWikiText( $text, $linestart = true ) {
 423                 global $wgTitle;
 424                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 425         }
 426
 427         /**
 428          * Add wikitext with tidy enabled
 429          */
 430         public function addWikiTextTidy(  $text, $linestart = true ) {
 431                 global $wgTitle;
 432                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 433         }
 434
 435
 436         /**
 437          * Add the output of a QuickTemplate to the output buffer
 438          *
 439          * @param QuickTemplate $template
 440          */
 441         public function addTemplate( &$template ) {
 442                 ob_start();
 443                 $template->execute();
 444                 $this->addHTML( ob_get_contents() );
 445                 ob_end_clean();
 446         }
 447
 448         /**
 449          * Parse wikitext and return the HTML.
 450          *
 451          * @param string $text
 452          * @param bool   $linestart Is this the start of a line?
 453          * @param bool   $interface ??
 454          */
 455         public function parse( $text, $linestart = true, $interface = false ) {
 456                 global $wgParser, $wgTitle;
 457                 $popts = $this->parserOptions();
 458                 if ( $interface) { $popts->setInterfaceMessage(true); }
 459                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 460                         $linestart, true, $this->mRevisionId );
 461                 if ( $interface) { $popts->setInterfaceMessage(false); }
 462                 return $parserOutput->getText();
 463         }
 464
 465         /**
 466          * @param Article $article
 467          * @param User    $user
 468          *
 469          * @return bool True if successful, else false.
 470          */
 471         public function tryParserCache( &$article, $user ) {
 472                 $parserCache =& ParserCache::singleton();
 473                 $parserOutput = $parserCache->get( $article, $user );
 474                 if ( $parserOutput !== false ) {
 475                         $this->addParserOutput( $parserOutput );
 476                         return true;
 477                 } else {
 478                         return false;
 479                 }
 480         }
 481
 482         /**
 483          * @param int $maxage Maximum cache time on the Squid, in seconds.
 484          */
 485         public function setSquidMaxage( $maxage ) {
 486                 $this->mSquidMaxage = $maxage;
 487         }
 488
 489         /**
 490          * Use enableClientCache(false) to force it to send nocache headers
 491          * @param $state ??
 492          */
 493         public function enableClientCache( $state ) {
 494                 return wfSetVar( $this->mEnableClientCache, $state );
 495         }
 496
 497         function uncacheableBecauseRequestvars() {
 498                 global $wgRequest;
 499                 return  $wgRequest->getText('useskin', false) === false
 500                         && $wgRequest->getText('uselang', false) === false;
 501         }
 502
 503         public function sendCacheControl() {
 504                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 505                 $fname = 'OutputPage::sendCacheControl';
 506
 507                 if ($wgUseETag && $this->mETag)
 508                         $wgRequest->response()->header("ETag: $this->mETag");
 509
 510                 # don't serve compressed data to clients who can't handle it
 511                 # maintain different caches for logged-in users and non-logged in ones
 512                 $wgRequest->response()->header( 'Vary: Accept-Encoding, Cookie' );
 513                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 514                         if( $wgUseSquid && session_id() == '' &&
 515                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 516                         {
 517                                 if ( $wgUseESI ) {
 518                                         # We'll purge the proxy cache explicitly, but require end user agents
 519                                         # to revalidate against the proxy on each visit.
 520                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 521                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 522                                         # start with a shorter timeout for initial testing
 523                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 524                                         $wgRequest->response()->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 525                                         $wgRequest->response()->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 526                                 } else {
 527                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 528                                         # to revalidate against the proxy on each visit.
 529                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 530                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 531                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 532                                         # start with a shorter timeout for initial testing
 533                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 534                                         $wgRequest->response()->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 535                                 }
 536                         } else {
 537                                 # We do want clients to cache if they can, but they *must* check for updates
 538                                 # on revisiting the page.
 539                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 540                                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 541                                 $wgRequest->response()->header( "Cache-Control: private, must-revalidate, max-age=0" );
 542                         }
 543                         if($this->mLastModified) $wgRequest->response()->header( "Last-modified: {$this->mLastModified}" );
 544                 } else {
 545                         wfDebug( "$fname: no caching **\n", false );
 546
 547                         # In general, the absence of a last modified header should be enough to prevent
 548                         # the client from using its cache. We send a few other things just to make sure.
 549                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 550                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 551                         $wgRequest->response()->header( 'Pragma: no-cache' );
 552                 }
 553         }
 554
 555         /**
 556          * Finally, all the text has been munged and accumulated into
 557          * the object, let's actually output it:
 558          */
 559         public function output() {
 560                 global $wgUser, $wgOutputEncoding, $wgRequest;
 561                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 562                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 563                 global $wgServer, $wgStyleVersion;
 564
 565                 if( $this->mDoNothing ){
 566                         return;
 567                 }
 568                 $fname = 'OutputPage::output';
 569                 wfProfileIn( $fname );
 570                 $sk = $wgUser->getSkin();
 571
 572                 if ( $wgUseAjax ) {
 573                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 574
 575                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 576
 577                         if( $wgAjaxSearch ) {
 578                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 579                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 580                         }
 581
 582                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 583                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 584                         }
 585                 }
 586
 587                 if ( '' != $this->mRedirect ) {
 588                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 589                                 # Standards require redirect URLs to be absolute
 590                                 global $wgServer;
 591                                 $this->mRedirect = $wgServer . $this->mRedirect;
 592                         }
 593                         if( $this->mRedirectCode == '301') {
 594                                 if( !$wgDebugRedirects ) {
 595                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 596                                 }
 597                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 598                         }
 599
 600                         $this->sendCacheControl();
 601
 602                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 603                         if( $wgDebugRedirects ) {
 604                                 $url = htmlspecialchars( $this->mRedirect );
 605                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 606                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 607                                 print "</body>\n</html>\n";
 608                         } else {
 609                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 610                         }
 611                         wfProfileOut( $fname );
 612                         return;
 613                 }
 614                 elseif ( $this->mStatusCode )
 615                 {
 616                         $statusMessage = array(
 617                                 100 => 'Continue',
 618                                 101 => 'Switching Protocols',
 619                                 102 => 'Processing',
 620                                 200 => 'OK',
 621                                 201 => 'Created',
 622                                 202 => 'Accepted',
 623                                 203 => 'Non-Authoritative Information',
 624                                 204 => 'No Content',
 625                                 205 => 'Reset Content',
 626                                 206 => 'Partial Content',
 627                                 207 => 'Multi-Status',
 628                                 300 => 'Multiple Choices',
 629                                 301 => 'Moved Permanently',
 630                                 302 => 'Found',
 631                                 303 => 'See Other',
 632                                 304 => 'Not Modified',
 633                                 305 => 'Use Proxy',
 634                                 307 => 'Temporary Redirect',
 635                                 400 => 'Bad Request',
 636                                 401 => 'Unauthorized',
 637                                 402 => 'Payment Required',
 638                                 403 => 'Forbidden',
 639                                 404 => 'Not Found',
 640                                 405 => 'Method Not Allowed',
 641                                 406 => 'Not Acceptable',
 642                                 407 => 'Proxy Authentication Required',
 643                                 408 => 'Request Timeout',
 644                                 409 => 'Conflict',
 645                                 410 => 'Gone',
 646                                 411 => 'Length Required',
 647                                 412 => 'Precondition Failed',
 648                                 413 => 'Request Entity Too Large',
 649                                 414 => 'Request-URI Too Large',
 650                                 415 => 'Unsupported Media Type',
 651                                 416 => 'Request Range Not Satisfiable',
 652                                 417 => 'Expectation Failed',
 653                                 422 => 'Unprocessable Entity',
 654                                 423 => 'Locked',
 655                                 424 => 'Failed Dependency',
 656                                 500 => 'Internal Server Error',
 657                                 501 => 'Not Implemented',
 658                                 502 => 'Bad Gateway',
 659                                 503 => 'Service Unavailable',
 660                                 504 => 'Gateway Timeout',
 661                                 505 => 'HTTP Version Not Supported',
 662                                 507 => 'Insufficient Storage'
 663                         );
 664
 665                         if ( $statusMessage[$this->mStatusCode] )
 666                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 667                 }
 668
 669                 # Buffer output; final headers may depend on later processing
 670                 ob_start();
 671
 672                 # Disable temporary placeholders, so that the skin produces HTML
 673                 $sk->postParseLinkColour( false );
 674
 675                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 676                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 677
 678                 if ($this->mArticleBodyOnly) {
 679                         $this->out($this->mBodytext);
 680                 } else {
 681                         wfProfileIn( 'Output-skin' );
 682                         $sk->outputPage( $this );
 683                         wfProfileOut( 'Output-skin' );
 684                 }
 685
 686                 $this->sendCacheControl();
 687                 ob_end_flush();
 688                 wfProfileOut( $fname );
 689         }
 690
 691         /**
 692          * @todo document
 693          * @param string $ins
 694          */
 695         public function out( $ins ) {
 696                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 697                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 698                         $outs = $ins;
 699                 } else {
 700                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 701                         if ( false === $outs ) { $outs = $ins; }
 702                 }
 703                 print $outs;
 704         }
 705
 706         /**
 707          * @todo document
 708          */
 709         public static function setEncodings() {
 710                 global $wgInputEncoding, $wgOutputEncoding;
 711                 global $wgUser, $wgContLang;
 712
 713                 $wgInputEncoding = strtolower( $wgInputEncoding );
 714
 715                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 716                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 717                         return;
 718                 }
 719                 $wgOutputEncoding = $wgInputEncoding;
 720         }
 721
 722         /**
 723          * Deprecated, use wfReportTime() instead.
 724          * @return string
 725          * @deprecated
 726          */
 727         public function reportTime() {
 728                 $time = wfReportTime();
 729                 return $time;
 730         }
 731
 732         /**
 733          * Produce a "user is blocked" page.
 734          *
 735          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 736          * @return nothing
 737          */
 738         function blockedPage( $return = true ) {
 739                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 740
 741                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 742                 $this->setRobotpolicy( 'noindex,nofollow' );
 743                 $this->setArticleRelated( false );
 744
 745                 $id = $wgUser->blockedBy();
 746                 $reason = $wgUser->blockedFor();
 747                 $ip = wfGetIP();
 748
 749                 if ( is_numeric( $id ) ) {
 750                         $name = User::whoIs( $id );
 751                 } else {
 752                         $name = $id;
 753                 }
 754                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 755
 756                 $blockid = $wgUser->mBlock->mId;
 757
 758                 $blockExpiry = $wgUser->mBlock->mExpiry;
 759                 if ( $blockExpiry == 'infinity' ) {
 760                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 761                         // Search for localization in 'ipboptions'
 762                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 763                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 764                                 if ( strpos( $option, ":" ) === false )
 765                                         continue;
 766                                 list( $show, $value ) = explode( ":", $option );
 767                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 768                                         $blockExpiry = $show;
 769                                         break;
 770                                 }
 771                         }
 772                 } else {
 773                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 774                 }
 775
 776                 if ( $wgUser->mBlock->mAuto ) {
 777                         $msg = 'autoblockedtext';
 778                 } else {
 779                         $msg = 'blockedtext';
 780                 }
 781
 782                 $this->addWikiText( wfMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry ) );
 783
 784                 # Don't auto-return to special pages
 785                 if( $return ) {
 786                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 787                         $this->returnToMain( false, $return );
 788                 }
 789         }
 790
 791         /**
 792          * Outputs a pretty page to explain why the request exploded.
 793          *
 794          * @param string $title Message key for page title.
 795          * @param string $msg   Message key for page text.
 796          * @return nothing
 797          */
 798         public function showErrorPage( $title, $msg ) {
 799                 global $wgTitle;
 800
 801                 $this->mDebugtext .= 'Original title: ' .
 802                   $wgTitle->getPrefixedText() . "\n";
 803                 $this->setPageTitle( wfMsg( $title ) );
 804                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 805                 $this->setRobotpolicy( 'noindex,nofollow' );
 806                 $this->setArticleRelated( false );
 807                 $this->enableClientCache( false );
 808                 $this->mRedirect = '';
 809
 810                 $this->mBodytext = '';
 811                 $this->addWikiText( wfMsg( $msg ) );
 812                 $this->returnToMain( false );
 813         }
 814
 815         /** @deprecated */
 816         public function errorpage( $title, $msg ) {
 817                 throw new ErrorPageError( $title, $msg );
 818         }
 819
 820         /**
 821          * Display an error page indicating that a given version of MediaWiki is
 822          * required to use it
 823          *
 824          * @param mixed $version The version of MediaWiki needed to use the page
 825          */
 826         public function versionRequired( $version ) {
 827                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 828                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 829                 $this->setRobotpolicy( 'noindex,nofollow' );
 830                 $this->setArticleRelated( false );
 831                 $this->mBodytext = '';
 832
 833                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 834                 $this->returnToMain();
 835         }
 836
 837         /**
 838          * Display an error page noting that a given permission bit is required.
 839          *
 840          * @param string $permission key required
 841          */
 842         public function permissionRequired( $permission ) {
 843                 global $wgGroupPermissions, $wgUser;
 844
 845                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 846                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 847                 $this->setRobotpolicy( 'noindex,nofollow' );
 848                 $this->setArticleRelated( false );
 849                 $this->mBodytext = '';
 850
 851                 $groups = array();
 852                 foreach( $wgGroupPermissions as $key => $value ) {
 853                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 854                                 $groupName = User::getGroupName( $key );
 855                                 $groupPage = User::getGroupPage( $key );
 856                                 if( $groupPage ) {
 857                                         $skin = $wgUser->getSkin();
 858                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
 859                                 } else {
 860                                         $groups[] = $groupName;
 861                                 }
 862                         }
 863                 }
 864                 $n = count( $groups );
 865                 $groups = implode( ', ', $groups );
 866                 switch( $n ) {
 867                         case 0:
 868                         case 1:
 869                         case 2:
 870                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 871                                 break;
 872                         default:
 873                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 874                 }
 875                 $this->addHtml( $message );
 876                 $this->returnToMain( false );
 877         }
 878
 879         /**
 880          * Use permissionRequired.
 881          * @deprecated
 882          */
 883         public function sysopRequired() {
 884                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 885         }
 886
 887         /**
 888          * Use permissionRequired.
 889          * @deprecated
 890          */
 891         public function developerRequired() {
 892                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 893         }
 894
 895         /**
 896          * Produce the stock "please login to use the wiki" page
 897          */
 898         public function loginToUse() {
 899                 global $wgUser, $wgTitle, $wgContLang;
 900
 901                 if( $wgUser->isLoggedIn() ) {
 902                         $this->permissionRequired( 'read' );
 903                         return;
 904                 }
 905
 906                 $skin = $wgUser->getSkin();
 907
 908                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 909                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
 910                 $this->setRobotPolicy( 'noindex,nofollow' );
 911                 $this->setArticleFlag( false );
 912
 913                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
 914                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
 915                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
 916                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
 917
 918                 # Don't return to the main page if the user can't read it
 919                 # otherwise we'll end up in a pointless loop
 920                 $mainPage = Title::newMainPage();
 921                 if( $mainPage->userCanRead() )
 922                         $this->returnToMain( true, $mainPage );
 923         }
 924
 925         /** @deprecated */
 926         public function databaseError( $fname, $sql, $error, $errno ) {
 927                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
 928         }
 929
 930         /**
 931          * @todo document
 932          * @param bool  $protected Is the reason the page can't be reached because it's protected?
 933          * @param mixed $source
 934          */
 935         public function readOnlyPage( $source = null, $protected = false ) {
 936                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 937                 $skin = $wgUser->getSkin();
 938
 939                 $this->setRobotpolicy( 'noindex,nofollow' );
 940                 $this->setArticleRelated( false );
 941
 942                 if( $protected ) {
 943                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 944                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 945
 946                         list( $cascadeSources, /* $restrictions */ ) = $wgTitle->getCascadeProtectionSources();
 947
 948                         # Determine if protection is due to the page being a system message
 949                         # and show an appropriate explanation
 950                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 951                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 952                         } if ( $cascadeSources && count($cascadeSources) > 0 ) {
 953                                 $titles = '';
 954
 955                                 foreach ( $cascadeSources as $title ) {
 956                                         $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 957                                 }
 958
 959                                 $notice = wfMsgExt( 'cascadeprotected', array('parsemag'), count($cascadeSources) ) . "\n$titles";
 960
 961                                 $this->addWikiText( $notice );
 962                         } else {
 963                                 $this->addWikiText( wfMsg( 'protectedpagetext' ) );
 964                         }
 965                 } else {
 966                         $this->setPageTitle( wfMsg( 'readonly' ) );
 967                         if ( $wgReadOnly ) {
 968                                 $reason = $wgReadOnly;
 969                         } else {
 970                                 $reason = file_get_contents( $wgReadOnlyFile );
 971                         }
 972                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 973                 }
 974
 975                 if( is_string( $source ) ) {
 976                         $this->addWikiText( wfMsg( 'viewsourcetext' ) );
 977                         $rows = $wgUser->getIntOption( 'rows' );
 978                         $cols = $wgUser->getIntOption( 'cols' );
 979                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
 980                                 htmlspecialchars( $source ) . "\n</textarea>";
 981                         $this->addHTML( $text );
 982                 }
 983                 $article = new Article($wgTitle);
 984                 $this->addHTML( $skin->formatTemplates($article->getUsedTemplates()) );
 985
 986                 $this->returnToMain( false );
 987         }
 988
 989         /** @deprecated */
 990         public function fatalError( $message ) {
 991                 throw new FatalError( $message );
 992         }
 993
 994         /** @deprecated */
 995         public function unexpectedValueError( $name, $val ) {
 996                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
 997         }
 998
 999         /** @deprecated */
1000         public function fileCopyError( $old, $new ) {
1001                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1002         }
1003
1004         /** @deprecated */
1005         public function fileRenameError( $old, $new ) {
1006                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1007         }
1008
1009         /** @deprecated */
1010         public function fileDeleteError( $name ) {
1011                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1012         }
1013
1014         /** @deprecated */
1015         public function fileNotFoundError( $name ) {
1016                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1017         }
1018
1019         public function showFatalError( $message ) {
1020                 $this->setPageTitle( wfMsg( "internalerror" ) );
1021                 $this->setRobotpolicy( "noindex,nofollow" );
1022                 $this->setArticleRelated( false );
1023                 $this->enableClientCache( false );
1024                 $this->mRedirect = '';
1025                 $this->mBodytext = $message;
1026         }
1027
1028         public function showUnexpectedValueError( $name, $val ) {
1029                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1030         }
1031
1032         public function showFileCopyError( $old, $new ) {
1033                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1034         }
1035
1036         public function showFileRenameError( $old, $new ) {
1037                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1038         }
1039
1040         public function showFileDeleteError( $name ) {
1041                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1042         }
1043
1044         public function showFileNotFoundError( $name ) {
1045                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1046         }
1047
1048         /**
1049          * return from error messages or notes
1050          * @param $auto automatically redirect the user after 10 seconds
1051          * @param $returnto page title to return to. Default is Main Page.
1052          */
1053         public function returnToMain( $auto = true, $returnto = NULL ) {
1054                 global $wgUser, $wgOut, $wgRequest;
1055
1056                 if ( $returnto == NULL ) {
1057                         $returnto = $wgRequest->getText( 'returnto' );
1058                 }
1059
1060                 if ( '' === $returnto ) {
1061                         $returnto = Title::newMainPage();
1062                 }
1063
1064                 if ( is_object( $returnto ) ) {
1065                         $titleObj = $returnto;
1066                 } else {
1067                         $titleObj = Title::newFromText( $returnto );
1068                 }
1069                 if ( !is_object( $titleObj ) ) {
1070                         $titleObj = Title::newMainPage();
1071                 }
1072
1073                 $sk = $wgUser->getSkin();
1074                 $link = $sk->makeLinkObj( $titleObj, '' );
1075
1076                 $r = wfMsg( 'returnto', $link );
1077                 if ( $auto ) {
1078                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
1079                 }
1080                 $wgOut->addHTML( "\n<p>$r</p>\n" );
1081         }
1082
1083         /**
1084          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1085          * and uses the first 10 of them for META keywords
1086          *
1087          * @param ParserOutput &$parserOutput
1088          */
1089         private function addKeywords( &$parserOutput ) {
1090                 global $wgTitle;
1091                 $this->addKeyword( $wgTitle->getPrefixedText() );
1092                 $count = 1;
1093                 $links2d =& $parserOutput->getLinks();
1094                 if ( !is_array( $links2d ) ) {
1095                         return;
1096                 }
1097                 foreach ( $links2d as $dbkeys ) {
1098                         foreach( $dbkeys as $dbkey => $unused ) {
1099                                 $this->addKeyword( $dbkey );
1100                                 if ( ++$count > 10 ) {
1101                                         break 2;
1102                                 }
1103                         }
1104                 }
1105         }
1106
1107         /**
1108          * @return string The doctype, opening <html>, and head element.
1109          */
1110         public function headElement() {
1111                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1112                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1113                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1114
1115                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1116                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1117                 } else {
1118                         $ret = '';
1119                 }
1120
1121                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1122
1123                 if ( '' == $this->getHTMLTitle() ) {
1124                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1125                 }
1126
1127                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1128                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1129                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1130                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1131                 }
1132                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1133                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1134                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1135
1136                 $ret .= $this->getHeadLinks();
1137                 global $wgStylePath;
1138                 if( $this->isPrintable() ) {
1139                         $media = '';
1140                 } else {
1141                         $media = "media='print'";
1142                 }
1143                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1144                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1145
1146                 $sk = $wgUser->getSkin();
1147                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1148                 $ret .= $this->mScripts;
1149                 $ret .= $sk->getUserStyles();
1150                 $ret .= $this->getHeadItems();
1151
1152                 if ($wgUseTrackbacks && $this->isArticleRelated())
1153                         $ret .= $wgTitle->trackbackRDF();
1154
1155                 $ret .= "</head>\n";
1156                 return $ret;
1157         }
1158
1159         /**
1160          * @return string HTML tag links to be put in the header.
1161          */
1162         public function getHeadLinks() {
1163                 global $wgRequest;
1164                 $ret = '';
1165                 foreach ( $this->mMetatags as $tag ) {
1166                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1167                                 $a = 'http-equiv';
1168                                 $tag[0] = substr( $tag[0], 5 );
1169                         } else {
1170                                 $a = 'name';
1171                         }
1172                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1173                 }
1174
1175                 $p = $this->mRobotpolicy;
1176                 if( $p !== '' && $p != 'index,follow' ) {
1177                         // http://www.robotstxt.org/wc/meta-user.html
1178                         // Only show if it's different from the default robots policy
1179                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1180                 }
1181
1182                 if ( count( $this->mKeywords ) > 0 ) {
1183                         $strip = array(
1184                                 "/<.*?>/" => '',
1185                                 "/_/" => ' '
1186                         );
1187                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1188                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1189                 }
1190                 foreach ( $this->mLinktags as $tag ) {
1191                         $ret .= "\t\t<link";
1192                         foreach( $tag as $attr => $val ) {
1193                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1194                         }
1195                         $ret .= " />\n";
1196                 }
1197                 if( $this->isSyndicated() ) {
1198                         # FIXME: centralize the mime-type and name information in Feed.php
1199                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1200                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1201                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1202                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 1.0' href='$link' />\n";
1203                 }
1204
1205                 return $ret;
1206         }
1207
1208         /**
1209          * Turn off regular page output and return an error reponse
1210          * for when rate limiting has triggered.
1211          * @todo i18n
1212          */
1213         public function rateLimited() {
1214                 global $wgOut;
1215                 $wgOut->disable();
1216                 wfHttpError( 500, 'Internal Server Error',
1217                         'Sorry, the server has encountered an internal error. ' .
1218                         'Please wait a moment and hit "refresh" to submit the request again.' );
1219         }
1220
1221         /**
1222          * Show an "add new section" link?
1223          *
1224          * @return bool True if the parser output instructs us to add one
1225          */
1226         public function showNewSectionLink() {
1227                 return $this->mNewSectionLink;
1228         }
1229 }
1230 ?>