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         function addStyle( $style ) {
  78                 global $wgStylePath, $wgStyleVersion;
  79                 $this->addLink(
  80                                 array(
  81                                         'rel' => 'stylesheet',
  82                                         'href' => $wgStylePath . '/' . $style . '?' . $wgStyleVersion ) );
  83         }
  84
  85         /**
  86          * Add a self-contained script tag with the given contents
  87          * @param string $script JavaScript text, no <script> tags
  88          */
  89         function addInlineScript( $script ) {
  90                 global $wgJsMimeType;
  91                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
  92         }
  93
  94         function getScript() {
  95                 return $this->mScripts . $this->getHeadItems();
  96         }
  97
  98         function getHeadItems() {
  99                 $s = '';
 100                 foreach ( $this->mHeadItems as $item ) {
 101                         $s .= $item;
 102                 }
 103                 return $s;
 104         }
 105
 106         function addHeadItem( $name, $value ) {
 107                 $this->mHeadItems[$name] = $value;
 108         }
 109
 110         function setETag($tag) { $this->mETag = $tag; }
 111         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 112         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 113
 114         function addLink( $linkarr ) {
 115                 # $linkarr should be an associative array of attributes. We'll escape on output.
 116                 array_push( $this->mLinktags, $linkarr );
 117         }
 118
 119         function addMetadataLink( $linkarr ) {
 120                 # note: buggy CC software only reads first "meta" link
 121                 static $haveMeta = false;
 122                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 123                 $this->addLink( $linkarr );
 124                 $haveMeta = true;
 125         }
 126
 127         /**
 128          * checkLastModified tells the client to use the client-cached page if
 129          * possible. If sucessful, the OutputPage is disabled so that
 130          * any future call to OutputPage->output() have no effect.
 131          *
 132          * @return bool True iff cache-ok headers was sent.
 133          */
 134         function checkLastModified ( $timestamp ) {
 135                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 136                 $fname = 'OutputPage::checkLastModified';
 137
 138                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 139                         wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
 140                         return;
 141                 }
 142                 if( !$wgCachePages ) {
 143                         wfDebug( "$fname: CACHE DISABLED\n", false );
 144                         return;
 145                 }
 146                 if( $wgUser->getOption( 'nocache' ) ) {
 147                         wfDebug( "$fname: USER DISABLED CACHE\n", false );
 148                         return;
 149                 }
 150
 151                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 152                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 153
 154                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 155                         # IE sends sizes after the date like this:
 156                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 157                         # this breaks strtotime().
 158                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 159                         $modsinceTime = strtotime( $modsince );
 160                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 161                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 162                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 163                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 164                                 # Make sure you're in a place you can leave when you call us!
 165                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 166                                 $this->mLastModified = $lastmod;
 167                                 $this->sendCacheControl();
 168                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 169                                 $this->disable();
 170
 171                                 // Don't output a compressed blob when using ob_gzhandler;
 172                                 // it's technically against HTTP spec and seems to confuse
 173                                 // Firefox when the response gets split over two packets.
 174                                 wfClearOutputBuffers();
 175
 176                                 return true;
 177                         } else {
 178                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 179                                 $this->mLastModified = $lastmod;
 180                         }
 181                 } else {
 182                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 183                         $this->mLastModified = $lastmod;
 184                 }
 185         }
 186
 187         function getPageTitleActionText () {
 188                 global $action;
 189                 switch($action) {
 190                         case 'edit':
 191                         case 'delete':
 192                         case 'protect':
 193                         case 'unprotect':
 194                         case 'watch':
 195                         case 'unwatch':
 196                                 // Display title is already customized
 197                                 return '';
 198                         case 'history':
 199                                 return wfMsg('history_short');
 200                         case 'submit':
 201                                 // FIXME: bug 2735; not correct for special pages etc
 202                                 return wfMsg('preview');
 203                         case 'info':
 204                                 return wfMsg('info_short');
 205                         default:
 206                                 return '';
 207                 }
 208         }
 209
 210         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 211         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 212         public function setPageTitle( $name ) {
 213                 global $action, $wgContLang;
 214                 $name = $wgContLang->convert($name, true);
 215                 $this->mPagetitle = $name;
 216                 if(!empty($action)) {
 217                         $taction =  $this->getPageTitleActionText();
 218                         if( !empty( $taction ) ) {
 219                                 $name .= ' - '.$taction;
 220                         }
 221                 }
 222
 223                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 224         }
 225         public function getHTMLTitle() { return $this->mHTMLtitle; }
 226         public function getPageTitle() { return $this->mPagetitle; }
 227         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 228         public function getSubtitle() { return $this->mSubtitle; }
 229         public function isArticle() { return $this->mIsarticle; }
 230         public function setPrintable() { $this->mPrintable = true; }
 231         public function isPrintable() { return $this->mPrintable; }
 232         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 233         public function isSyndicated() { return $this->mShowFeedLinks; }
 234         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 235         public function getOnloadHandler() { return $this->mOnloadHandler; }
 236         public function disable() { $this->mDoNothing = true; }
 237
 238         public function setArticleRelated( $v ) {
 239                 $this->mIsArticleRelated = $v;
 240                 if ( !$v ) {
 241                         $this->mIsarticle = false;
 242                 }
 243         }
 244         public function setArticleFlag( $v ) {
 245                 $this->mIsarticle = $v;
 246                 if ( $v ) {
 247                         $this->mIsArticleRelated = $v;
 248                 }
 249         }
 250
 251         public function isArticleRelated() { return $this->mIsArticleRelated; }
 252
 253         public function getLanguageLinks() { return $this->mLanguageLinks; }
 254         public function addLanguageLinks($newLinkArray) {
 255                 $this->mLanguageLinks += $newLinkArray;
 256         }
 257         public function setLanguageLinks($newLinkArray) {
 258                 $this->mLanguageLinks = $newLinkArray;
 259         }
 260
 261         public function getCategoryLinks() {
 262                 return $this->mCategoryLinks;
 263         }
 264
 265         /**
 266          * Add an array of categories, with names in the keys
 267          */
 268         public function addCategoryLinks($categories) {
 269                 global $wgUser, $wgContLang;
 270
 271                 if ( !is_array( $categories ) ) {
 272                         return;
 273                 }
 274                 # Add the links to the link cache in a batch
 275                 $arr = array( NS_CATEGORY => $categories );
 276                 $lb = new LinkBatch;
 277                 $lb->setArray( $arr );
 278                 $lb->execute();
 279
 280                 $sk = $wgUser->getSkin();
 281                 foreach ( $categories as $category => $unused ) {
 282                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 283                         $text = $wgContLang->convertHtml( $title->getText() );
 284                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 285                 }
 286         }
 287
 288         public function setCategoryLinks($categories) {
 289                 $this->mCategoryLinks = array();
 290                 $this->addCategoryLinks($categories);
 291         }
 292
 293         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 294         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 295
 296         public function disallowUserJs() { $this->mAllowUserJs = false; }
 297         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 298
 299         public function addHTML( $text ) { $this->mBodytext .= $text; }
 300         public function clearHTML() { $this->mBodytext = ''; }
 301         public function getHTML() { return $this->mBodytext; }
 302         public function debug( $text ) { $this->mDebugtext .= $text; }
 303
 304         /* @deprecated */
 305         public function setParserOptions( $options ) {
 306                 return $this->parserOptions( $options );
 307         }
 308
 309         public function parserOptions( $options = null ) {
 310                 if ( !$this->mParserOptions ) {
 311                         $this->mParserOptions = new ParserOptions;
 312                 }
 313                 return wfSetVar( $this->mParserOptions, $options );
 314         }
 315
 316         /**
 317          * Set the revision ID which will be seen by the wiki text parser
 318          * for things such as embedded {{REVISIONID}} variable use.
 319          * @param mixed $revid an integer, or NULL
 320          * @return mixed previous value
 321          */
 322         public function setRevisionId( $revid ) {
 323                 $val = is_null( $revid ) ? null : intval( $revid );
 324                 return wfSetVar( $this->mRevisionId, $val );
 325         }
 326
 327         /**
 328          * Convert wikitext to HTML and add it to the buffer
 329          * Default assumes that the current page title will
 330          * be used.
 331          *
 332          * @param string $text
 333          * @param bool   $linestart
 334          */
 335         public function addWikiText( $text, $linestart = true ) {
 336                 global $wgTitle;
 337                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 338         }
 339
 340         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 341                 $this->addWikiTextTitle($text, $title, $linestart);
 342         }
 343
 344         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 345                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 346         }
 347
 348         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 349                 global $wgParser;
 350
 351                 $fname = 'OutputPage:addWikiTextTitle';
 352                 wfProfileIn($fname);
 353
 354                 wfIncrStats('pcache_not_possible');
 355
 356                 $popts = $this->parserOptions();
 357                 $popts->setTidy($tidy);
 358
 359                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 360                         $linestart, true, $this->mRevisionId );
 361
 362                 $this->addParserOutput( $parserOutput );
 363
 364                 wfProfileOut($fname);
 365         }
 366
 367         /**
 368          * @todo document
 369          * @param ParserOutput object &$parserOutput
 370          */
 371         public function addParserOutputNoText( &$parserOutput ) {
 372                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 373                 $this->addCategoryLinks( $parserOutput->getCategories() );
 374                 $this->mNewSectionLink = $parserOutput->getNewSection();
 375                 $this->addKeywords( $parserOutput );
 376                 if ( $parserOutput->getCacheTime() == -1 ) {
 377                         $this->enableClientCache( false );
 378                 }
 379                 if ( $parserOutput->mHTMLtitle != "" ) {
 380                         $this->mPagetitle = $parserOutput->mHTMLtitle ;
 381                 }
 382                 if ( $parserOutput->mSubtitle != '' ) {
 383                         $this->mSubtitle .= $parserOutput->mSubtitle ;
 384                 }
 385                 $this->mNoGallery = $parserOutput->getNoGallery();
 386                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 387                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 388         }
 389
 390         /**
 391          * @todo document
 392          * @param ParserOutput &$parserOutput
 393          */
 394         function addParserOutput( &$parserOutput ) {
 395                 $this->addParserOutputNoText( $parserOutput );
 396                 $text = $parserOutput->getText();
 397                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 398                 $this->addHTML( $text );
 399         }
 400
 401         /**
 402          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 403          * Saves the text into the parser cache if possible.
 404          *
 405          * @param string  $text
 406          * @param Article $article
 407          * @param bool    $cache
 408          * @deprecated Use Article::outputWikitext
 409          */
 410         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 411                 global $wgParser, $wgUser;
 412
 413                 $popts = $this->parserOptions();
 414                 $popts->setTidy(true);
 415                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 416                         $popts, true, true, $this->mRevisionId );
 417                 $popts->setTidy(false);
 418                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 419                         $parserCache =& ParserCache::singleton();
 420                         $parserCache->save( $parserOutput, $article, $wgUser );
 421                 }
 422
 423                 $this->addParserOutput( $parserOutput );
 424         }
 425
 426         /**
 427          * @deprecated use addWikiTextTidy()
 428          */
 429         public function addSecondaryWikiText( $text, $linestart = true ) {
 430                 global $wgTitle;
 431                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 432         }
 433
 434         /**
 435          * Add wikitext with tidy enabled
 436          */
 437         public function addWikiTextTidy(  $text, $linestart = true ) {
 438                 global $wgTitle;
 439                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 440         }
 441
 442
 443         /**
 444          * Add the output of a QuickTemplate to the output buffer
 445          *
 446          * @param QuickTemplate $template
 447          */
 448         public function addTemplate( &$template ) {
 449                 ob_start();
 450                 $template->execute();
 451                 $this->addHTML( ob_get_contents() );
 452                 ob_end_clean();
 453         }
 454
 455         /**
 456          * Parse wikitext and return the HTML.
 457          *
 458          * @param string $text
 459          * @param bool   $linestart Is this the start of a line?
 460          * @param bool   $interface ??
 461          */
 462         public function parse( $text, $linestart = true, $interface = false ) {
 463                 global $wgParser, $wgTitle;
 464                 $popts = $this->parserOptions();
 465                 if ( $interface) { $popts->setInterfaceMessage(true); }
 466                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 467                         $linestart, true, $this->mRevisionId );
 468                 if ( $interface) { $popts->setInterfaceMessage(false); }
 469                 return $parserOutput->getText();
 470         }
 471
 472         /**
 473          * @param Article $article
 474          * @param User    $user
 475          *
 476          * @return bool True if successful, else false.
 477          */
 478         public function tryParserCache( &$article, $user ) {
 479                 $parserCache =& ParserCache::singleton();
 480                 $parserOutput = $parserCache->get( $article, $user );
 481                 if ( $parserOutput !== false ) {
 482                         $this->addParserOutput( $parserOutput );
 483                         return true;
 484                 } else {
 485                         return false;
 486                 }
 487         }
 488
 489         /**
 490          * @param int $maxage Maximum cache time on the Squid, in seconds.
 491          */
 492         public function setSquidMaxage( $maxage ) {
 493                 $this->mSquidMaxage = $maxage;
 494         }
 495
 496         /**
 497          * Use enableClientCache(false) to force it to send nocache headers
 498          * @param $state ??
 499          */
 500         public function enableClientCache( $state ) {
 501                 return wfSetVar( $this->mEnableClientCache, $state );
 502         }
 503
 504         function uncacheableBecauseRequestvars() {
 505                 global $wgRequest;
 506                 return  $wgRequest->getText('useskin', false) === false
 507                         && $wgRequest->getText('uselang', false) === false;
 508         }
 509
 510         public function sendCacheControl() {
 511                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 512                 $fname = 'OutputPage::sendCacheControl';
 513
 514                 if ($wgUseETag && $this->mETag)
 515                         $wgRequest->response()->header("ETag: $this->mETag");
 516
 517                 # don't serve compressed data to clients who can't handle it
 518                 # maintain different caches for logged-in users and non-logged in ones
 519                 $wgRequest->response()->header( 'Vary: Accept-Encoding, Cookie' );
 520                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 521                         if( $wgUseSquid && session_id() == '' &&
 522                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 523                         {
 524                                 if ( $wgUseESI ) {
 525                                         # We'll purge the proxy cache explicitly, but require end user agents
 526                                         # to revalidate against the proxy on each visit.
 527                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 528                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 529                                         # start with a shorter timeout for initial testing
 530                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 531                                         $wgRequest->response()->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 532                                         $wgRequest->response()->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 533                                 } else {
 534                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 535                                         # to revalidate against the proxy on each visit.
 536                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 537                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 538                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 539                                         # start with a shorter timeout for initial testing
 540                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 541                                         $wgRequest->response()->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 542                                 }
 543                         } else {
 544                                 # We do want clients to cache if they can, but they *must* check for updates
 545                                 # on revisiting the page.
 546                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 547                                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 548                                 $wgRequest->response()->header( "Cache-Control: private, must-revalidate, max-age=0" );
 549                         }
 550                         if($this->mLastModified) $wgRequest->response()->header( "Last-modified: {$this->mLastModified}" );
 551                 } else {
 552                         wfDebug( "$fname: no caching **\n", false );
 553
 554                         # In general, the absence of a last modified header should be enough to prevent
 555                         # the client from using its cache. We send a few other things just to make sure.
 556                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 557                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 558                         $wgRequest->response()->header( 'Pragma: no-cache' );
 559                 }
 560         }
 561
 562         /**
 563          * Finally, all the text has been munged and accumulated into
 564          * the object, let's actually output it:
 565          */
 566         public function output() {
 567                 global $wgUser, $wgOutputEncoding, $wgRequest;
 568                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 569                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 570                 global $wgServer, $wgStyleVersion;
 571
 572                 if( $this->mDoNothing ){
 573                         return;
 574                 }
 575                 $fname = 'OutputPage::output';
 576                 wfProfileIn( $fname );
 577                 $sk = $wgUser->getSkin();
 578
 579                 if ( $wgUseAjax ) {
 580                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 581
 582                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 583
 584                         if( $wgAjaxSearch ) {
 585                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 586                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 587                         }
 588
 589                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 590                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 591                         }
 592                 }
 593
 594                 if ( '' != $this->mRedirect ) {
 595                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 596                                 # Standards require redirect URLs to be absolute
 597                                 global $wgServer;
 598                                 $this->mRedirect = $wgServer . $this->mRedirect;
 599                         }
 600                         if( $this->mRedirectCode == '301') {
 601                                 if( !$wgDebugRedirects ) {
 602                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 603                                 }
 604                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 605                         }
 606
 607                         $this->sendCacheControl();
 608
 609                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 610                         if( $wgDebugRedirects ) {
 611                                 $url = htmlspecialchars( $this->mRedirect );
 612                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 613                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 614                                 print "</body>\n</html>\n";
 615                         } else {
 616                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 617                         }
 618                         wfProfileOut( $fname );
 619                         return;
 620                 }
 621                 elseif ( $this->mStatusCode )
 622                 {
 623                         $statusMessage = array(
 624                                 100 => 'Continue',
 625                                 101 => 'Switching Protocols',
 626                                 102 => 'Processing',
 627                                 200 => 'OK',
 628                                 201 => 'Created',
 629                                 202 => 'Accepted',
 630                                 203 => 'Non-Authoritative Information',
 631                                 204 => 'No Content',
 632                                 205 => 'Reset Content',
 633                                 206 => 'Partial Content',
 634                                 207 => 'Multi-Status',
 635                                 300 => 'Multiple Choices',
 636                                 301 => 'Moved Permanently',
 637                                 302 => 'Found',
 638                                 303 => 'See Other',
 639                                 304 => 'Not Modified',
 640                                 305 => 'Use Proxy',
 641                                 307 => 'Temporary Redirect',
 642                                 400 => 'Bad Request',
 643                                 401 => 'Unauthorized',
 644                                 402 => 'Payment Required',
 645                                 403 => 'Forbidden',
 646                                 404 => 'Not Found',
 647                                 405 => 'Method Not Allowed',
 648                                 406 => 'Not Acceptable',
 649                                 407 => 'Proxy Authentication Required',
 650                                 408 => 'Request Timeout',
 651                                 409 => 'Conflict',
 652                                 410 => 'Gone',
 653                                 411 => 'Length Required',
 654                                 412 => 'Precondition Failed',
 655                                 413 => 'Request Entity Too Large',
 656                                 414 => 'Request-URI Too Large',
 657                                 415 => 'Unsupported Media Type',
 658                                 416 => 'Request Range Not Satisfiable',
 659                                 417 => 'Expectation Failed',
 660                                 422 => 'Unprocessable Entity',
 661                                 423 => 'Locked',
 662                                 424 => 'Failed Dependency',
 663                                 500 => 'Internal Server Error',
 664                                 501 => 'Not Implemented',
 665                                 502 => 'Bad Gateway',
 666                                 503 => 'Service Unavailable',
 667                                 504 => 'Gateway Timeout',
 668                                 505 => 'HTTP Version Not Supported',
 669                                 507 => 'Insufficient Storage'
 670                         );
 671
 672                         if ( $statusMessage[$this->mStatusCode] )
 673                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 674                 }
 675
 676                 # Buffer output; final headers may depend on later processing
 677                 ob_start();
 678
 679                 # Disable temporary placeholders, so that the skin produces HTML
 680                 $sk->postParseLinkColour( false );
 681
 682                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 683                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 684
 685                 if ($this->mArticleBodyOnly) {
 686                         $this->out($this->mBodytext);
 687                 } else {
 688                         wfProfileIn( 'Output-skin' );
 689                         $sk->outputPage( $this );
 690                         wfProfileOut( 'Output-skin' );
 691                 }
 692
 693                 $this->sendCacheControl();
 694                 ob_end_flush();
 695                 wfProfileOut( $fname );
 696         }
 697
 698         /**
 699          * @todo document
 700          * @param string $ins
 701          */
 702         public function out( $ins ) {
 703                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 704                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 705                         $outs = $ins;
 706                 } else {
 707                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 708                         if ( false === $outs ) { $outs = $ins; }
 709                 }
 710                 print $outs;
 711         }
 712
 713         /**
 714          * @todo document
 715          */
 716         public static function setEncodings() {
 717                 global $wgInputEncoding, $wgOutputEncoding;
 718                 global $wgUser, $wgContLang;
 719
 720                 $wgInputEncoding = strtolower( $wgInputEncoding );
 721
 722                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 723                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 724                         return;
 725                 }
 726                 $wgOutputEncoding = $wgInputEncoding;
 727         }
 728
 729         /**
 730          * Deprecated, use wfReportTime() instead.
 731          * @return string
 732          * @deprecated
 733          */
 734         public function reportTime() {
 735                 $time = wfReportTime();
 736                 return $time;
 737         }
 738
 739         /**
 740          * Produce a "user is blocked" page.
 741          *
 742          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 743          * @return nothing
 744          */
 745         function blockedPage( $return = true ) {
 746                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 747
 748                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 749                 $this->setRobotpolicy( 'noindex,nofollow' );
 750                 $this->setArticleRelated( false );
 751
 752                 $id = $wgUser->blockedBy();
 753                 $reason = $wgUser->blockedFor();
 754                 $ip = wfGetIP();
 755
 756                 if ( is_numeric( $id ) ) {
 757                         $name = User::whoIs( $id );
 758                 } else {
 759                         $name = $id;
 760                 }
 761                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 762
 763                 $blockid = $wgUser->mBlock->mId;
 764
 765                 $blockExpiry = $wgUser->mBlock->mExpiry;
 766                 if ( $blockExpiry == 'infinity' ) {
 767                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 768                         // Search for localization in 'ipboptions'
 769                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 770                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 771                                 if ( strpos( $option, ":" ) === false )
 772                                         continue;
 773                                 list( $show, $value ) = explode( ":", $option );
 774                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 775                                         $blockExpiry = $show;
 776                                         break;
 777                                 }
 778                         }
 779                 } else {
 780                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 781                 }
 782
 783                 if ( $wgUser->mBlock->mAuto ) {
 784                         $msg = 'autoblockedtext';
 785                 } else {
 786                         $msg = 'blockedtext';
 787                 }
 788
 789                 $this->addWikiText( wfMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry ) );
 790
 791                 # Don't auto-return to special pages
 792                 if( $return ) {
 793                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 794                         $this->returnToMain( false, $return );
 795                 }
 796         }
 797
 798         /**
 799          * Outputs a pretty page to explain why the request exploded.
 800          *
 801          * @param string $title Message key for page title.
 802          * @param string $msg   Message key for page text.
 803          * @return nothing
 804          */
 805         public function showErrorPage( $title, $msg ) {
 806                 global $wgTitle;
 807
 808                 $this->mDebugtext .= 'Original title: ' .
 809                   $wgTitle->getPrefixedText() . "\n";
 810                 $this->setPageTitle( wfMsg( $title ) );
 811                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 812                 $this->setRobotpolicy( 'noindex,nofollow' );
 813                 $this->setArticleRelated( false );
 814                 $this->enableClientCache( false );
 815                 $this->mRedirect = '';
 816
 817                 $this->mBodytext = '';
 818                 $this->addWikiText( wfMsg( $msg ) );
 819                 $this->returnToMain( false );
 820         }
 821
 822         /** @deprecated */
 823         public function errorpage( $title, $msg ) {
 824                 throw new ErrorPageError( $title, $msg );
 825         }
 826
 827         /**
 828          * Display an error page indicating that a given version of MediaWiki is
 829          * required to use it
 830          *
 831          * @param mixed $version The version of MediaWiki needed to use the page
 832          */
 833         public function versionRequired( $version ) {
 834                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 835                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 836                 $this->setRobotpolicy( 'noindex,nofollow' );
 837                 $this->setArticleRelated( false );
 838                 $this->mBodytext = '';
 839
 840                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 841                 $this->returnToMain();
 842         }
 843
 844         /**
 845          * Display an error page noting that a given permission bit is required.
 846          *
 847          * @param string $permission key required
 848          */
 849         public function permissionRequired( $permission ) {
 850                 global $wgGroupPermissions, $wgUser;
 851
 852                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 853                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 854                 $this->setRobotpolicy( 'noindex,nofollow' );
 855                 $this->setArticleRelated( false );
 856                 $this->mBodytext = '';
 857
 858                 $groups = array();
 859                 foreach( $wgGroupPermissions as $key => $value ) {
 860                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 861                                 $groupName = User::getGroupName( $key );
 862                                 $groupPage = User::getGroupPage( $key );
 863                                 if( $groupPage ) {
 864                                         $skin = $wgUser->getSkin();
 865                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
 866                                 } else {
 867                                         $groups[] = $groupName;
 868                                 }
 869                         }
 870                 }
 871                 $n = count( $groups );
 872                 $groups = implode( ', ', $groups );
 873                 switch( $n ) {
 874                         case 0:
 875                         case 1:
 876                         case 2:
 877                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 878                                 break;
 879                         default:
 880                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 881                 }
 882                 $this->addHtml( $message );
 883                 $this->returnToMain( false );
 884         }
 885
 886         /**
 887          * Use permissionRequired.
 888          * @deprecated
 889          */
 890         public function sysopRequired() {
 891                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 892         }
 893
 894         /**
 895          * Use permissionRequired.
 896          * @deprecated
 897          */
 898         public function developerRequired() {
 899                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 900         }
 901
 902         /**
 903          * Produce the stock "please login to use the wiki" page
 904          */
 905         public function loginToUse() {
 906                 global $wgUser, $wgTitle, $wgContLang;
 907
 908                 if( $wgUser->isLoggedIn() ) {
 909                         $this->permissionRequired( 'read' );
 910                         return;
 911                 }
 912
 913                 $skin = $wgUser->getSkin();
 914
 915                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 916                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
 917                 $this->setRobotPolicy( 'noindex,nofollow' );
 918                 $this->setArticleFlag( false );
 919
 920                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
 921                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
 922                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
 923                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
 924
 925                 # Don't return to the main page if the user can't read it
 926                 # otherwise we'll end up in a pointless loop
 927                 $mainPage = Title::newMainPage();
 928                 if( $mainPage->userCanRead() )
 929                         $this->returnToMain( true, $mainPage );
 930         }
 931
 932         /** @deprecated */
 933         public function databaseError( $fname, $sql, $error, $errno ) {
 934                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
 935         }
 936
 937         /**
 938          * @todo document
 939          * @param bool  $protected Is the reason the page can't be reached because it's protected?
 940          * @param mixed $source
 941          */
 942         public function readOnlyPage( $source = null, $protected = false ) {
 943                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 944                 $skin = $wgUser->getSkin();
 945
 946                 $this->setRobotpolicy( 'noindex,nofollow' );
 947                 $this->setArticleRelated( false );
 948
 949                 if( $protected ) {
 950                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 951                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 952
 953                         list( $cascadeSources, /* $restrictions */ ) = $wgTitle->getCascadeProtectionSources();
 954
 955                         # Determine if protection is due to the page being a system message
 956                         # and show an appropriate explanation
 957                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 958                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 959                         } if ( $cascadeSources && count($cascadeSources) > 0 ) {
 960                                 $titles = '';
 961
 962                                 foreach ( $cascadeSources as $title ) {
 963                                         $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 964                                 }
 965
 966                                 $notice = wfMsgExt( 'cascadeprotected', array('parsemag'), count($cascadeSources) ) . "\n$titles";
 967
 968                                 $this->addWikiText( $notice );
 969                         } else {
 970                                 $this->addWikiText( wfMsg( 'protectedpagetext' ) );
 971                         }
 972                 } else {
 973                         $this->setPageTitle( wfMsg( 'readonly' ) );
 974                         if ( $wgReadOnly ) {
 975                                 $reason = $wgReadOnly;
 976                         } else {
 977                                 $reason = file_get_contents( $wgReadOnlyFile );
 978                         }
 979                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 980                 }
 981
 982                 if( is_string( $source ) ) {
 983                         $this->addWikiText( wfMsg( 'viewsourcetext' ) );
 984                         $rows = $wgUser->getIntOption( 'rows' );
 985                         $cols = $wgUser->getIntOption( 'cols' );
 986                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
 987                                 htmlspecialchars( $source ) . "\n</textarea>";
 988                         $this->addHTML( $text );
 989                 }
 990                 $article = new Article($wgTitle);
 991                 $this->addHTML( $skin->formatTemplates($article->getUsedTemplates()) );
 992
 993                 $this->returnToMain( false );
 994         }
 995
 996         /** @deprecated */
 997         public function fatalError( $message ) {
 998                 throw new FatalError( $message );
 999         }
1000
1001         /** @deprecated */
1002         public function unexpectedValueError( $name, $val ) {
1003                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1004         }
1005
1006         /** @deprecated */
1007         public function fileCopyError( $old, $new ) {
1008                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1009         }
1010
1011         /** @deprecated */
1012         public function fileRenameError( $old, $new ) {
1013                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1014         }
1015
1016         /** @deprecated */
1017         public function fileDeleteError( $name ) {
1018                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1019         }
1020
1021         /** @deprecated */
1022         public function fileNotFoundError( $name ) {
1023                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1024         }
1025
1026         public function showFatalError( $message ) {
1027                 $this->setPageTitle( wfMsg( "internalerror" ) );
1028                 $this->setRobotpolicy( "noindex,nofollow" );
1029                 $this->setArticleRelated( false );
1030                 $this->enableClientCache( false );
1031                 $this->mRedirect = '';
1032                 $this->mBodytext = $message;
1033         }
1034
1035         public function showUnexpectedValueError( $name, $val ) {
1036                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1037         }
1038
1039         public function showFileCopyError( $old, $new ) {
1040                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1041         }
1042
1043         public function showFileRenameError( $old, $new ) {
1044                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1045         }
1046
1047         public function showFileDeleteError( $name ) {
1048                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1049         }
1050
1051         public function showFileNotFoundError( $name ) {
1052                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1053         }
1054
1055         /**
1056          * return from error messages or notes
1057          * @param $auto automatically redirect the user after 10 seconds
1058          * @param $returnto page title to return to. Default is Main Page.
1059          */
1060         public function returnToMain( $auto = true, $returnto = NULL ) {
1061                 global $wgUser, $wgOut, $wgRequest;
1062
1063                 if ( $returnto == NULL ) {
1064                         $returnto = $wgRequest->getText( 'returnto' );
1065                 }
1066
1067                 if ( '' === $returnto ) {
1068                         $returnto = Title::newMainPage();
1069                 }
1070
1071                 if ( is_object( $returnto ) ) {
1072                         $titleObj = $returnto;
1073                 } else {
1074                         $titleObj = Title::newFromText( $returnto );
1075                 }
1076                 if ( !is_object( $titleObj ) ) {
1077                         $titleObj = Title::newMainPage();
1078                 }
1079
1080                 $sk = $wgUser->getSkin();
1081                 $link = $sk->makeLinkObj( $titleObj, '' );
1082
1083                 $r = wfMsg( 'returnto', $link );
1084                 if ( $auto ) {
1085                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
1086                 }
1087                 $wgOut->addHTML( "\n<p>$r</p>\n" );
1088         }
1089
1090         /**
1091          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1092          * and uses the first 10 of them for META keywords
1093          *
1094          * @param ParserOutput &$parserOutput
1095          */
1096         private function addKeywords( &$parserOutput ) {
1097                 global $wgTitle;
1098                 $this->addKeyword( $wgTitle->getPrefixedText() );
1099                 $count = 1;
1100                 $links2d =& $parserOutput->getLinks();
1101                 if ( !is_array( $links2d ) ) {
1102                         return;
1103                 }
1104                 foreach ( $links2d as $dbkeys ) {
1105                         foreach( $dbkeys as $dbkey => $unused ) {
1106                                 $this->addKeyword( $dbkey );
1107                                 if ( ++$count > 10 ) {
1108                                         break 2;
1109                                 }
1110                         }
1111                 }
1112         }
1113
1114         /**
1115          * @return string The doctype, opening <html>, and head element.
1116          */
1117         public function headElement() {
1118                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1119                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1120                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1121
1122                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1123                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1124                 } else {
1125                         $ret = '';
1126                 }
1127
1128                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1129
1130                 if ( '' == $this->getHTMLTitle() ) {
1131                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1132                 }
1133
1134                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1135                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1136                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1137                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1138                 }
1139                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1140                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1141                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1142
1143                 $ret .= $this->getHeadLinks();
1144                 global $wgStylePath;
1145                 if( $this->isPrintable() ) {
1146                         $media = '';
1147                 } else {
1148                         $media = "media='print'";
1149                 }
1150                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1151                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1152
1153                 $sk = $wgUser->getSkin();
1154                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1155                 $ret .= $this->mScripts;
1156                 $ret .= $sk->getUserStyles();
1157                 $ret .= $this->getHeadItems();
1158
1159                 if ($wgUseTrackbacks && $this->isArticleRelated())
1160                         $ret .= $wgTitle->trackbackRDF();
1161
1162                 $ret .= "</head>\n";
1163                 return $ret;
1164         }
1165
1166         /**
1167          * @return string HTML tag links to be put in the header.
1168          */
1169         public function getHeadLinks() {
1170                 global $wgRequest;
1171                 $ret = '';
1172                 foreach ( $this->mMetatags as $tag ) {
1173                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1174                                 $a = 'http-equiv';
1175                                 $tag[0] = substr( $tag[0], 5 );
1176                         } else {
1177                                 $a = 'name';
1178                         }
1179                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1180                 }
1181
1182                 $p = $this->mRobotpolicy;
1183                 if( $p !== '' && $p != 'index,follow' ) {
1184                         // http://www.robotstxt.org/wc/meta-user.html
1185                         // Only show if it's different from the default robots policy
1186                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1187                 }
1188
1189                 if ( count( $this->mKeywords ) > 0 ) {
1190                         $strip = array(
1191                                 "/<.*?>/" => '',
1192                                 "/_/" => ' '
1193                         );
1194                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1195                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1196                 }
1197                 foreach ( $this->mLinktags as $tag ) {
1198                         $ret .= "\t\t<link";
1199                         foreach( $tag as $attr => $val ) {
1200                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1201                         }
1202                         $ret .= " />\n";
1203                 }
1204                 if( $this->isSyndicated() ) {
1205                         # FIXME: centralize the mime-type and name information in Feed.php
1206                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1207                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1208                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1209                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 1.0' href='$link' />\n";
1210                 }
1211
1212                 return $ret;
1213         }
1214
1215         /**
1216          * Turn off regular page output and return an error reponse
1217          * for when rate limiting has triggered.
1218          * @todo i18n
1219          */
1220         public function rateLimited() {
1221                 global $wgOut;
1222                 $wgOut->disable();
1223                 wfHttpError( 500, 'Internal Server Error',
1224                         'Sorry, the server has encountered an internal error. ' .
1225                         'Please wait a moment and hit "refresh" to submit the request again.' );
1226         }
1227
1228         /**
1229          * Show an "add new section" link?
1230          *
1231          * @return bool True if the parser output instructs us to add one
1232          */
1233         public function showNewSectionLink() {
1234                 return $this->mNewSectionLink;
1235         }
1236
1237         /**
1238          * Show a warning about slave lag
1239          *
1240          * If the lag is higher than 30 seconds, then the warning is
1241          * a bit more obvious
1242          *
1243          * @param int $lag Slave lag
1244          */
1245         public function showLagWarning( $lag ) {
1246                 $message = $lag >= 30 ? 'lag-warn-high' : 'lag-warn-normal';
1247                 $warning = wfMsgHtml( $message, htmlspecialchars( $lag ) );
1248                 $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1249         }
1250
1251 }
1252
1253 ?>