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                 $this->mTemplateIds = array();
  58                 $this->mImageTimestamps = array();
  59         }
  60
  61         public function redirect( $url, $responsecode = '302' ) {
  62                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  63                 $this->mRedirect = str_replace( "\n", '', $url );
  64                 $this->mRedirectCode = $responsecode;
  65         }
  66
  67         /**
  68          * Set the HTTP status code to send with the output.
  69          *
  70          * @param int $statusCode
  71          * @return nothing
  72          */
  73         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  74
  75         # To add an http-equiv meta tag, precede the name with "http:"
  76         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  77         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  78         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  79         function addStyle( $style ) {
  80                 global $wgStylePath, $wgStyleVersion;
  81                 $this->addLink(
  82                                 array(
  83                                         'rel' => 'stylesheet',
  84                                         'href' => $wgStylePath . '/' . $style . '?' . $wgStyleVersion ) );
  85         }
  86
  87         /**
  88          * Add a self-contained script tag with the given contents
  89          * @param string $script JavaScript text, no <script> tags
  90          */
  91         function addInlineScript( $script ) {
  92                 global $wgJsMimeType;
  93                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
  94         }
  95
  96         function getScript() {
  97                 return $this->mScripts . $this->getHeadItems();
  98         }
  99
 100         function getHeadItems() {
 101                 $s = '';
 102                 foreach ( $this->mHeadItems as $item ) {
 103                         $s .= $item;
 104                 }
 105                 return $s;
 106         }
 107
 108         function addHeadItem( $name, $value ) {
 109                 $this->mHeadItems[$name] = $value;
 110         }
 111
 112         function setETag($tag) { $this->mETag = $tag; }
 113         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 114         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 115
 116         function addLink( $linkarr ) {
 117                 # $linkarr should be an associative array of attributes. We'll escape on output.
 118                 array_push( $this->mLinktags, $linkarr );
 119         }
 120
 121         function addMetadataLink( $linkarr ) {
 122                 # note: buggy CC software only reads first "meta" link
 123                 static $haveMeta = false;
 124                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 125                 $this->addLink( $linkarr );
 126                 $haveMeta = true;
 127         }
 128
 129         /**
 130          * checkLastModified tells the client to use the client-cached page if
 131          * possible. If sucessful, the OutputPage is disabled so that
 132          * any future call to OutputPage->output() have no effect.
 133          *
 134          * @return bool True iff cache-ok headers was sent.
 135          */
 136         function checkLastModified ( $timestamp ) {
 137                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 138                 $fname = 'OutputPage::checkLastModified';
 139
 140                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 141                         wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
 142                         return;
 143                 }
 144                 if( !$wgCachePages ) {
 145                         wfDebug( "$fname: CACHE DISABLED\n", false );
 146                         return;
 147                 }
 148                 if( $wgUser->getOption( 'nocache' ) ) {
 149                         wfDebug( "$fname: USER DISABLED CACHE\n", false );
 150                         return;
 151                 }
 152
 153                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 154                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 155
 156                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 157                         # IE sends sizes after the date like this:
 158                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 159                         # this breaks strtotime().
 160                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 161                         $modsinceTime = strtotime( $modsince );
 162                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 163                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 164                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 165                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 166                                 # Make sure you're in a place you can leave when you call us!
 167                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 168                                 $this->mLastModified = $lastmod;
 169                                 $this->sendCacheControl();
 170                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 171                                 $this->disable();
 172
 173                                 // Don't output a compressed blob when using ob_gzhandler;
 174                                 // it's technically against HTTP spec and seems to confuse
 175                                 // Firefox when the response gets split over two packets.
 176                                 wfClearOutputBuffers();
 177
 178                                 return true;
 179                         } else {
 180                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 181                                 $this->mLastModified = $lastmod;
 182                         }
 183                 } else {
 184                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 185                         $this->mLastModified = $lastmod;
 186                 }
 187         }
 188
 189         function getPageTitleActionText () {
 190                 global $action;
 191                 switch($action) {
 192                         case 'edit':
 193                         case 'delete':
 194                         case 'protect':
 195                         case 'unprotect':
 196                         case 'watch':
 197                         case 'unwatch':
 198                                 // Display title is already customized
 199                                 return '';
 200                         case 'history':
 201                                 return wfMsg('history_short');
 202                         case 'submit':
 203                                 // FIXME: bug 2735; not correct for special pages etc
 204                                 return wfMsg('preview');
 205                         case 'info':
 206                                 return wfMsg('info_short');
 207                         default:
 208                                 return '';
 209                 }
 210         }
 211
 212         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 213         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 214         public function setPageTitle( $name ) {
 215                 global $action, $wgContLang;
 216                 $name = $wgContLang->convert($name, true);
 217                 $this->mPagetitle = $name;
 218                 if(!empty($action)) {
 219                         $taction =  $this->getPageTitleActionText();
 220                         if( !empty( $taction ) ) {
 221                                 $name .= ' - '.$taction;
 222                         }
 223                 }
 224
 225                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 226         }
 227         public function getHTMLTitle() { return $this->mHTMLtitle; }
 228         public function getPageTitle() { return $this->mPagetitle; }
 229         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 230         public function getSubtitle() { return $this->mSubtitle; }
 231         public function isArticle() { return $this->mIsarticle; }
 232         public function setPrintable() { $this->mPrintable = true; }
 233         public function isPrintable() { return $this->mPrintable; }
 234         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 235         public function isSyndicated() { return $this->mShowFeedLinks; }
 236         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 237         public function getOnloadHandler() { return $this->mOnloadHandler; }
 238         public function disable() { $this->mDoNothing = true; }
 239
 240         public function setArticleRelated( $v ) {
 241                 $this->mIsArticleRelated = $v;
 242                 if ( !$v ) {
 243                         $this->mIsarticle = false;
 244                 }
 245         }
 246         public function setArticleFlag( $v ) {
 247                 $this->mIsarticle = $v;
 248                 if ( $v ) {
 249                         $this->mIsArticleRelated = $v;
 250                 }
 251         }
 252
 253         public function isArticleRelated() { return $this->mIsArticleRelated; }
 254
 255         public function getLanguageLinks() { return $this->mLanguageLinks; }
 256         public function addLanguageLinks($newLinkArray) {
 257                 $this->mLanguageLinks += $newLinkArray;
 258         }
 259         public function setLanguageLinks($newLinkArray) {
 260                 $this->mLanguageLinks = $newLinkArray;
 261         }
 262
 263         public function getCategoryLinks() {
 264                 return $this->mCategoryLinks;
 265         }
 266
 267         /**
 268          * Add an array of categories, with names in the keys
 269          */
 270         public function addCategoryLinks($categories) {
 271                 global $wgUser, $wgContLang;
 272
 273                 if ( !is_array( $categories ) ) {
 274                         return;
 275                 }
 276                 # Add the links to the link cache in a batch
 277                 $arr = array( NS_CATEGORY => $categories );
 278                 $lb = new LinkBatch;
 279                 $lb->setArray( $arr );
 280                 $lb->execute();
 281
 282                 $sk = $wgUser->getSkin();
 283                 foreach ( $categories as $category => $unused ) {
 284                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 285                         $text = $wgContLang->convertHtml( $title->getText() );
 286                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 287                 }
 288         }
 289
 290         public function setCategoryLinks($categories) {
 291                 $this->mCategoryLinks = array();
 292                 $this->addCategoryLinks($categories);
 293         }
 294
 295         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 296         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 297
 298         public function disallowUserJs() { $this->mAllowUserJs = false; }
 299         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 300
 301         public function addHTML( $text ) { $this->mBodytext .= $text; }
 302         public function clearHTML() { $this->mBodytext = ''; }
 303         public function getHTML() { return $this->mBodytext; }
 304         public function debug( $text ) { $this->mDebugtext .= $text; }
 305
 306         /* @deprecated */
 307         public function setParserOptions( $options ) {
 308                 return $this->parserOptions( $options );
 309         }
 310
 311         public function parserOptions( $options = null ) {
 312                 if ( !$this->mParserOptions ) {
 313                         $this->mParserOptions = new ParserOptions;
 314                 }
 315                 return wfSetVar( $this->mParserOptions, $options );
 316         }
 317
 318         /**
 319          * Set the revision ID which will be seen by the wiki text parser
 320          * for things such as embedded {{REVISIONID}} variable use.
 321          * @param mixed $revid an integer, or NULL
 322          * @return mixed previous value
 323          */
 324         public function setRevisionId( $revid ) {
 325                 $val = is_null( $revid ) ? null : intval( $revid );
 326                 return wfSetVar( $this->mRevisionId, $val );
 327         }
 328
 329         /**
 330          * Convert wikitext to HTML and add it to the buffer
 331          * Default assumes that the current page title will
 332          * be used.
 333          *
 334          * @param string $text
 335          * @param bool   $linestart
 336          */
 337         public function addWikiText( $text, $linestart = true ) {
 338                 global $wgTitle;
 339                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 340         }
 341
 342         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 343                 $this->addWikiTextTitle($text, $title, $linestart);
 344         }
 345
 346         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 347                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 348         }
 349
 350         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 351                 global $wgParser;
 352
 353                 $fname = 'OutputPage:addWikiTextTitle';
 354                 wfProfileIn($fname);
 355
 356                 wfIncrStats('pcache_not_possible');
 357
 358                 $popts = $this->parserOptions();
 359                 $popts->setTidy($tidy);
 360
 361                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 362                         $linestart, true, $this->mRevisionId );
 363
 364                 $this->addParserOutput( $parserOutput );
 365
 366                 wfProfileOut($fname);
 367         }
 368
 369         /**
 370          * @todo document
 371          * @param ParserOutput object &$parserOutput
 372          */
 373         public function addParserOutputNoText( &$parserOutput ) {
 374                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 375                 $this->addCategoryLinks( $parserOutput->getCategories() );
 376                 $this->mNewSectionLink = $parserOutput->getNewSection();
 377                 $this->addKeywords( $parserOutput );
 378                 if ( $parserOutput->getCacheTime() == -1 ) {
 379                         $this->enableClientCache( false );
 380                 }
 381                 if ( $parserOutput->mHTMLtitle != "" ) {
 382                         $this->mPagetitle = $parserOutput->mHTMLtitle ;
 383                 }
 384                 if ( $parserOutput->mSubtitle != '' ) {
 385                         $this->mSubtitle .= $parserOutput->mSubtitle ;
 386                 }
 387                 $this->mNoGallery = $parserOutput->getNoGallery();
 388                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 389                 // Versioning...
 390                 $this->mTemplateIds += (array)$parserOutput->mTemplateIds;
 391                 $this->mImageTimestamps += (array)$parserOutput->mImageTimestamps;
 392
 393                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 394         }
 395
 396         /**
 397          * @todo document
 398          * @param ParserOutput &$parserOutput
 399          */
 400         function addParserOutput( &$parserOutput ) {
 401                 $this->addParserOutputNoText( $parserOutput );
 402                 $text = $parserOutput->getText();
 403                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 404                 $this->addHTML( $text );
 405         }
 406
 407         /**
 408          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 409          * Saves the text into the parser cache if possible.
 410          *
 411          * @param string  $text
 412          * @param Article $article
 413          * @param bool    $cache
 414          * @deprecated Use Article::outputWikitext
 415          */
 416         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 417                 global $wgParser, $wgUser;
 418
 419                 $popts = $this->parserOptions();
 420                 $popts->setTidy(true);
 421                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 422                         $popts, true, true, $this->mRevisionId );
 423                 $popts->setTidy(false);
 424                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 425                         $parserCache =& ParserCache::singleton();
 426                         $parserCache->save( $parserOutput, $article, $wgUser );
 427                 }
 428
 429                 $this->addParserOutput( $parserOutput );
 430         }
 431
 432         /**
 433          * @deprecated use addWikiTextTidy()
 434          */
 435         public function addSecondaryWikiText( $text, $linestart = true ) {
 436                 global $wgTitle;
 437                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 438         }
 439
 440         /**
 441          * Add wikitext with tidy enabled
 442          */
 443         public function addWikiTextTidy(  $text, $linestart = true ) {
 444                 global $wgTitle;
 445                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 446         }
 447
 448
 449         /**
 450          * Add the output of a QuickTemplate to the output buffer
 451          *
 452          * @param QuickTemplate $template
 453          */
 454         public function addTemplate( &$template ) {
 455                 ob_start();
 456                 $template->execute();
 457                 $this->addHTML( ob_get_contents() );
 458                 ob_end_clean();
 459         }
 460
 461         /**
 462          * Parse wikitext and return the HTML.
 463          *
 464          * @param string $text
 465          * @param bool   $linestart Is this the start of a line?
 466          * @param bool   $interface ??
 467          */
 468         public function parse( $text, $linestart = true, $interface = false ) {
 469                 global $wgParser, $wgTitle;
 470                 $popts = $this->parserOptions();
 471                 if ( $interface) { $popts->setInterfaceMessage(true); }
 472                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 473                         $linestart, true, $this->mRevisionId );
 474                 if ( $interface) { $popts->setInterfaceMessage(false); }
 475                 return $parserOutput->getText();
 476         }
 477
 478         /**
 479          * @param Article $article
 480          * @param User    $user
 481          *
 482          * @return bool True if successful, else false.
 483          */
 484         public function tryParserCache( &$article, $user ) {
 485                 $parserCache =& ParserCache::singleton();
 486                 $parserOutput = $parserCache->get( $article, $user );
 487                 if ( $parserOutput !== false ) {
 488                         $this->addParserOutput( $parserOutput );
 489                         return true;
 490                 } else {
 491                         return false;
 492                 }
 493         }
 494
 495         /**
 496          * @param int $maxage Maximum cache time on the Squid, in seconds.
 497          */
 498         public function setSquidMaxage( $maxage ) {
 499                 $this->mSquidMaxage = $maxage;
 500         }
 501
 502         /**
 503          * Use enableClientCache(false) to force it to send nocache headers
 504          * @param $state ??
 505          */
 506         public function enableClientCache( $state ) {
 507                 return wfSetVar( $this->mEnableClientCache, $state );
 508         }
 509
 510         function uncacheableBecauseRequestvars() {
 511                 global $wgRequest;
 512                 return  $wgRequest->getText('useskin', false) === false
 513                         && $wgRequest->getText('uselang', false) === false;
 514         }
 515
 516         public function sendCacheControl() {
 517                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 518                 $fname = 'OutputPage::sendCacheControl';
 519
 520                 if ($wgUseETag && $this->mETag)
 521                         $wgRequest->response()->header("ETag: $this->mETag");
 522
 523                 # don't serve compressed data to clients who can't handle it
 524                 # maintain different caches for logged-in users and non-logged in ones
 525                 $wgRequest->response()->header( 'Vary: Accept-Encoding, Cookie' );
 526                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 527                         if( $wgUseSquid && session_id() == '' &&
 528                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 529                         {
 530                                 if ( $wgUseESI ) {
 531                                         # We'll purge the proxy cache explicitly, but require end user agents
 532                                         # to revalidate against the proxy on each visit.
 533                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 534                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 535                                         # start with a shorter timeout for initial testing
 536                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 537                                         $wgRequest->response()->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 538                                         $wgRequest->response()->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 539                                 } else {
 540                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 541                                         # to revalidate against the proxy on each visit.
 542                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 543                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 544                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 545                                         # start with a shorter timeout for initial testing
 546                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 547                                         $wgRequest->response()->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 548                                 }
 549                         } else {
 550                                 # We do want clients to cache if they can, but they *must* check for updates
 551                                 # on revisiting the page.
 552                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 553                                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 554                                 $wgRequest->response()->header( "Cache-Control: private, must-revalidate, max-age=0" );
 555                         }
 556                         if($this->mLastModified) $wgRequest->response()->header( "Last-modified: {$this->mLastModified}" );
 557                 } else {
 558                         wfDebug( "$fname: no caching **\n", false );
 559
 560                         # In general, the absence of a last modified header should be enough to prevent
 561                         # the client from using its cache. We send a few other things just to make sure.
 562                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 563                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 564                         $wgRequest->response()->header( 'Pragma: no-cache' );
 565                 }
 566         }
 567
 568         /**
 569          * Finally, all the text has been munged and accumulated into
 570          * the object, let's actually output it:
 571          */
 572         public function output() {
 573                 global $wgUser, $wgOutputEncoding, $wgRequest;
 574                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 575                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 576                 global $wgServer, $wgStyleVersion;
 577
 578                 if( $this->mDoNothing ){
 579                         return;
 580                 }
 581                 $fname = 'OutputPage::output';
 582                 wfProfileIn( $fname );
 583                 $sk = $wgUser->getSkin();
 584
 585                 if ( $wgUseAjax ) {
 586                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 587
 588                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 589
 590                         if( $wgAjaxSearch ) {
 591                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 592                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 593                         }
 594
 595                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 596                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 597                         }
 598                 }
 599
 600                 if ( '' != $this->mRedirect ) {
 601                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 602                                 # Standards require redirect URLs to be absolute
 603                                 global $wgServer;
 604                                 $this->mRedirect = $wgServer . $this->mRedirect;
 605                         }
 606                         if( $this->mRedirectCode == '301') {
 607                                 if( !$wgDebugRedirects ) {
 608                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 609                                 }
 610                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 611                         }
 612
 613                         $this->sendCacheControl();
 614
 615                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 616                         if( $wgDebugRedirects ) {
 617                                 $url = htmlspecialchars( $this->mRedirect );
 618                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 619                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 620                                 print "</body>\n</html>\n";
 621                         } else {
 622                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 623                         }
 624                         wfProfileOut( $fname );
 625                         return;
 626                 }
 627                 elseif ( $this->mStatusCode )
 628                 {
 629                         $statusMessage = array(
 630                                 100 => 'Continue',
 631                                 101 => 'Switching Protocols',
 632                                 102 => 'Processing',
 633                                 200 => 'OK',
 634                                 201 => 'Created',
 635                                 202 => 'Accepted',
 636                                 203 => 'Non-Authoritative Information',
 637                                 204 => 'No Content',
 638                                 205 => 'Reset Content',
 639                                 206 => 'Partial Content',
 640                                 207 => 'Multi-Status',
 641                                 300 => 'Multiple Choices',
 642                                 301 => 'Moved Permanently',
 643                                 302 => 'Found',
 644                                 303 => 'See Other',
 645                                 304 => 'Not Modified',
 646                                 305 => 'Use Proxy',
 647                                 307 => 'Temporary Redirect',
 648                                 400 => 'Bad Request',
 649                                 401 => 'Unauthorized',
 650                                 402 => 'Payment Required',
 651                                 403 => 'Forbidden',
 652                                 404 => 'Not Found',
 653                                 405 => 'Method Not Allowed',
 654                                 406 => 'Not Acceptable',
 655                                 407 => 'Proxy Authentication Required',
 656                                 408 => 'Request Timeout',
 657                                 409 => 'Conflict',
 658                                 410 => 'Gone',
 659                                 411 => 'Length Required',
 660                                 412 => 'Precondition Failed',
 661                                 413 => 'Request Entity Too Large',
 662                                 414 => 'Request-URI Too Large',
 663                                 415 => 'Unsupported Media Type',
 664                                 416 => 'Request Range Not Satisfiable',
 665                                 417 => 'Expectation Failed',
 666                                 422 => 'Unprocessable Entity',
 667                                 423 => 'Locked',
 668                                 424 => 'Failed Dependency',
 669                                 500 => 'Internal Server Error',
 670                                 501 => 'Not Implemented',
 671                                 502 => 'Bad Gateway',
 672                                 503 => 'Service Unavailable',
 673                                 504 => 'Gateway Timeout',
 674                                 505 => 'HTTP Version Not Supported',
 675                                 507 => 'Insufficient Storage'
 676                         );
 677
 678                         if ( $statusMessage[$this->mStatusCode] )
 679                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 680                 }
 681
 682                 # Buffer output; final headers may depend on later processing
 683                 ob_start();
 684
 685                 # Disable temporary placeholders, so that the skin produces HTML
 686                 $sk->postParseLinkColour( false );
 687
 688                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 689                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 690
 691                 if ($this->mArticleBodyOnly) {
 692                         $this->out($this->mBodytext);
 693                 } else {
 694                         wfProfileIn( 'Output-skin' );
 695                         $sk->outputPage( $this );
 696                         wfProfileOut( 'Output-skin' );
 697                 }
 698
 699                 $this->sendCacheControl();
 700                 ob_end_flush();
 701                 wfProfileOut( $fname );
 702         }
 703
 704         /**
 705          * @todo document
 706          * @param string $ins
 707          */
 708         public function out( $ins ) {
 709                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 710                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 711                         $outs = $ins;
 712                 } else {
 713                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 714                         if ( false === $outs ) { $outs = $ins; }
 715                 }
 716                 print $outs;
 717         }
 718
 719         /**
 720          * @todo document
 721          */
 722         public static function setEncodings() {
 723                 global $wgInputEncoding, $wgOutputEncoding;
 724                 global $wgUser, $wgContLang;
 725
 726                 $wgInputEncoding = strtolower( $wgInputEncoding );
 727
 728                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 729                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 730                         return;
 731                 }
 732                 $wgOutputEncoding = $wgInputEncoding;
 733         }
 734
 735         /**
 736          * Deprecated, use wfReportTime() instead.
 737          * @return string
 738          * @deprecated
 739          */
 740         public function reportTime() {
 741                 $time = wfReportTime();
 742                 return $time;
 743         }
 744
 745         /**
 746          * Produce a "user is blocked" page.
 747          *
 748          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 749          * @return nothing
 750          */
 751         function blockedPage( $return = true ) {
 752                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 753
 754                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 755                 $this->setRobotpolicy( 'noindex,nofollow' );
 756                 $this->setArticleRelated( false );
 757
 758                 $id = $wgUser->blockedBy();
 759                 $reason = $wgUser->blockedFor();
 760                 $ip = wfGetIP();
 761
 762                 if ( is_numeric( $id ) ) {
 763                         $name = User::whoIs( $id );
 764                 } else {
 765                         $name = $id;
 766                 }
 767                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 768
 769                 $blockid = $wgUser->mBlock->mId;
 770
 771                 $blockExpiry = $wgUser->mBlock->mExpiry;
 772                 if ( $blockExpiry == 'infinity' ) {
 773                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 774                         // Search for localization in 'ipboptions'
 775                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 776                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 777                                 if ( strpos( $option, ":" ) === false )
 778                                         continue;
 779                                 list( $show, $value ) = explode( ":", $option );
 780                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 781                                         $blockExpiry = $show;
 782                                         break;
 783                                 }
 784                         }
 785                 } else {
 786                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 787                 }
 788
 789                 if ( $wgUser->mBlock->mAuto ) {
 790                         $msg = 'autoblockedtext';
 791                 } else {
 792                         $msg = 'blockedtext';
 793                 }
 794
 795                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
 796                  * This could be a username, an ip range, or a single ip. */
 797                 $intended = $wgUser->mBlock->mAddress;
 798
 799                 $this->addWikiText( wfMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended ) );
 800
 801                 # Don't auto-return to special pages
 802                 if( $return ) {
 803                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 804                         $this->returnToMain( false, $return );
 805                 }
 806         }
 807
 808         /**
 809          * Output a standard error page
 810          *
 811          * @param string $title Message key for page title
 812          * @param string $msg Message key for page text
 813          * @param array $params Message parameters
 814          */
 815         public function showErrorPage( $title, $msg, $params = array() ) {
 816                 global $wgTitle;
 817
 818                 $this->mDebugtext .= 'Original title: ' .
 819                   $wgTitle->getPrefixedText() . "\n";
 820                 $this->setPageTitle( wfMsg( $title ) );
 821                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 822                 $this->setRobotpolicy( 'noindex,nofollow' );
 823                 $this->setArticleRelated( false );
 824                 $this->enableClientCache( false );
 825                 $this->mRedirect = '';
 826                 $this->mBodytext = '';
 827
 828                 array_unshift( $params, $msg );
 829                 $message = call_user_func_array( 'wfMsg', $params );
 830                 $this->addWikiText( $message );
 831
 832                 $this->returnToMain( false );
 833         }
 834
 835         /** @deprecated */
 836         public function errorpage( $title, $msg ) {
 837                 throw new ErrorPageError( $title, $msg );
 838         }
 839
 840         /**
 841          * Display an error page indicating that a given version of MediaWiki is
 842          * required to use it
 843          *
 844          * @param mixed $version The version of MediaWiki needed to use the page
 845          */
 846         public function versionRequired( $version ) {
 847                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 848                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 849                 $this->setRobotpolicy( 'noindex,nofollow' );
 850                 $this->setArticleRelated( false );
 851                 $this->mBodytext = '';
 852
 853                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 854                 $this->returnToMain();
 855         }
 856
 857         /**
 858          * Display an error page noting that a given permission bit is required.
 859          *
 860          * @param string $permission key required
 861          */
 862         public function permissionRequired( $permission ) {
 863                 global $wgGroupPermissions, $wgUser;
 864
 865                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 866                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 867                 $this->setRobotpolicy( 'noindex,nofollow' );
 868                 $this->setArticleRelated( false );
 869                 $this->mBodytext = '';
 870
 871                 $groups = array();
 872                 foreach( $wgGroupPermissions as $key => $value ) {
 873                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 874                                 $groupName = User::getGroupName( $key );
 875                                 $groupPage = User::getGroupPage( $key );
 876                                 if( $groupPage ) {
 877                                         $skin = $wgUser->getSkin();
 878                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
 879                                 } else {
 880                                         $groups[] = $groupName;
 881                                 }
 882                         }
 883                 }
 884                 $n = count( $groups );
 885                 $groups = implode( ', ', $groups );
 886                 switch( $n ) {
 887                         case 0:
 888                         case 1:
 889                         case 2:
 890                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 891                                 break;
 892                         default:
 893                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 894                 }
 895                 $this->addHtml( $message );
 896                 $this->returnToMain( false );
 897         }
 898
 899         /**
 900          * Use permissionRequired.
 901          * @deprecated
 902          */
 903         public function sysopRequired() {
 904                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 905         }
 906
 907         /**
 908          * Use permissionRequired.
 909          * @deprecated
 910          */
 911         public function developerRequired() {
 912                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 913         }
 914
 915         /**
 916          * Produce the stock "please login to use the wiki" page
 917          */
 918         public function loginToUse() {
 919                 global $wgUser, $wgTitle, $wgContLang;
 920
 921                 if( $wgUser->isLoggedIn() ) {
 922                         $this->permissionRequired( 'read' );
 923                         return;
 924                 }
 925
 926                 $skin = $wgUser->getSkin();
 927
 928                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 929                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
 930                 $this->setRobotPolicy( 'noindex,nofollow' );
 931                 $this->setArticleFlag( false );
 932
 933                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
 934                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
 935                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
 936                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
 937
 938                 # Don't return to the main page if the user can't read it
 939                 # otherwise we'll end up in a pointless loop
 940                 $mainPage = Title::newMainPage();
 941                 if( $mainPage->userCanRead() )
 942                         $this->returnToMain( true, $mainPage );
 943         }
 944
 945         /** @deprecated */
 946         public function databaseError( $fname, $sql, $error, $errno ) {
 947                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
 948         }
 949
 950         /**
 951          * @todo document
 952          * @param bool  $protected Is the reason the page can't be reached because it's protected?
 953          * @param mixed $source
 954          */
 955         public function readOnlyPage( $source = null, $protected = false ) {
 956                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 957                 $skin = $wgUser->getSkin();
 958
 959                 $this->setRobotpolicy( 'noindex,nofollow' );
 960                 $this->setArticleRelated( false );
 961
 962                 if( $protected ) {
 963                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 964                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 965
 966                         list( $cascadeSources, /* $restrictions */ ) = $wgTitle->getCascadeProtectionSources();
 967
 968                         # Determine if protection is due to the page being a system message
 969                         # and show an appropriate explanation
 970                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 971                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 972                         } if ( $cascadeSources && count($cascadeSources) > 0 ) {
 973                                 $titles = '';
 974
 975                                 foreach ( $cascadeSources as $title ) {
 976                                         $titles .= '* [[:' . $title->getPrefixedText() . "]]\n";
 977                                 }
 978
 979                                 $notice = wfMsgExt( 'cascadeprotected', array('parsemag'), count($cascadeSources) ) . "\n$titles";
 980
 981                                 $this->addWikiText( $notice );
 982                         } else {
 983                                 $this->addWikiText( wfMsg( 'protectedpagetext' ) );
 984                         }
 985                 } else {
 986                         $this->setPageTitle( wfMsg( 'readonly' ) );
 987                         if ( $wgReadOnly ) {
 988                                 $reason = $wgReadOnly;
 989                         } else {
 990                                 $reason = file_get_contents( $wgReadOnlyFile );
 991                         }
 992                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 993                 }
 994
 995                 if( is_string( $source ) ) {
 996                         $this->addWikiText( wfMsg( 'viewsourcetext' ) );
 997                         $rows = $wgUser->getIntOption( 'rows' );
 998                         $cols = $wgUser->getIntOption( 'cols' );
 999                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
1000                                 htmlspecialchars( $source ) . "\n</textarea>";
1001                         $this->addHTML( $text );
1002                 }
1003                 $article = new Article($wgTitle);
1004                 $this->addHTML( $skin->formatTemplates($article->getUsedTemplates()) );
1005
1006                 $this->returnToMain( false );
1007         }
1008
1009         /** @deprecated */
1010         public function fatalError( $message ) {
1011                 throw new FatalError( $message );
1012         }
1013
1014         /** @deprecated */
1015         public function unexpectedValueError( $name, $val ) {
1016                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1017         }
1018
1019         /** @deprecated */
1020         public function fileCopyError( $old, $new ) {
1021                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1022         }
1023
1024         /** @deprecated */
1025         public function fileRenameError( $old, $new ) {
1026                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1027         }
1028
1029         /** @deprecated */
1030         public function fileDeleteError( $name ) {
1031                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1032         }
1033
1034         /** @deprecated */
1035         public function fileNotFoundError( $name ) {
1036                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1037         }
1038
1039         public function showFatalError( $message ) {
1040                 $this->setPageTitle( wfMsg( "internalerror" ) );
1041                 $this->setRobotpolicy( "noindex,nofollow" );
1042                 $this->setArticleRelated( false );
1043                 $this->enableClientCache( false );
1044                 $this->mRedirect = '';
1045                 $this->mBodytext = $message;
1046         }
1047
1048         public function showUnexpectedValueError( $name, $val ) {
1049                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1050         }
1051
1052         public function showFileCopyError( $old, $new ) {
1053                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1054         }
1055
1056         public function showFileRenameError( $old, $new ) {
1057                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1058         }
1059
1060         public function showFileDeleteError( $name ) {
1061                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1062         }
1063
1064         public function showFileNotFoundError( $name ) {
1065                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1066         }
1067
1068         /**
1069          * return from error messages or notes
1070          * @param $auto automatically redirect the user after 10 seconds
1071          * @param $returnto page title to return to. Default is Main Page.
1072          */
1073         public function returnToMain( $auto = true, $returnto = NULL ) {
1074                 global $wgUser, $wgOut, $wgRequest;
1075
1076                 if ( $returnto == NULL ) {
1077                         $returnto = $wgRequest->getText( 'returnto' );
1078                 }
1079
1080                 if ( '' === $returnto ) {
1081                         $returnto = Title::newMainPage();
1082                 }
1083
1084                 if ( is_object( $returnto ) ) {
1085                         $titleObj = $returnto;
1086                 } else {
1087                         $titleObj = Title::newFromText( $returnto );
1088                 }
1089                 if ( !is_object( $titleObj ) ) {
1090                         $titleObj = Title::newMainPage();
1091                 }
1092
1093                 $sk = $wgUser->getSkin();
1094                 $link = $sk->makeLinkObj( $titleObj, '' );
1095
1096                 $r = wfMsg( 'returnto', $link );
1097                 if ( $auto ) {
1098                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
1099                 }
1100                 $wgOut->addHTML( "\n<p>$r</p>\n" );
1101         }
1102
1103         /**
1104          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1105          * and uses the first 10 of them for META keywords
1106          *
1107          * @param ParserOutput &$parserOutput
1108          */
1109         private function addKeywords( &$parserOutput ) {
1110                 global $wgTitle;
1111                 $this->addKeyword( $wgTitle->getPrefixedText() );
1112                 $count = 1;
1113                 $links2d =& $parserOutput->getLinks();
1114                 if ( !is_array( $links2d ) ) {
1115                         return;
1116                 }
1117                 foreach ( $links2d as $dbkeys ) {
1118                         foreach( $dbkeys as $dbkey => $unused ) {
1119                                 $this->addKeyword( $dbkey );
1120                                 if ( ++$count > 10 ) {
1121                                         break 2;
1122                                 }
1123                         }
1124                 }
1125         }
1126
1127         /**
1128          * @return string The doctype, opening <html>, and head element.
1129          */
1130         public function headElement() {
1131                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1132                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1133                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1134
1135                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1136                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1137                 } else {
1138                         $ret = '';
1139                 }
1140
1141                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1142
1143                 if ( '' == $this->getHTMLTitle() ) {
1144                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1145                 }
1146
1147                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1148                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1149                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1150                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1151                 }
1152                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1153                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1154                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1155
1156                 $ret .= $this->getHeadLinks();
1157                 global $wgStylePath;
1158                 if( $this->isPrintable() ) {
1159                         $media = '';
1160                 } else {
1161                         $media = "media='print'";
1162                 }
1163                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1164                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1165
1166                 $sk = $wgUser->getSkin();
1167                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1168                 $ret .= $this->mScripts;
1169                 $ret .= $sk->getUserStyles();
1170                 $ret .= $this->getHeadItems();
1171
1172                 if ($wgUseTrackbacks && $this->isArticleRelated())
1173                         $ret .= $wgTitle->trackbackRDF();
1174
1175                 $ret .= "</head>\n";
1176                 return $ret;
1177         }
1178
1179         /**
1180          * @return string HTML tag links to be put in the header.
1181          */
1182         public function getHeadLinks() {
1183                 global $wgRequest;
1184                 $ret = '';
1185                 foreach ( $this->mMetatags as $tag ) {
1186                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1187                                 $a = 'http-equiv';
1188                                 $tag[0] = substr( $tag[0], 5 );
1189                         } else {
1190                                 $a = 'name';
1191                         }
1192                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1193                 }
1194
1195                 $p = $this->mRobotpolicy;
1196                 if( $p !== '' && $p != 'index,follow' ) {
1197                         // http://www.robotstxt.org/wc/meta-user.html
1198                         // Only show if it's different from the default robots policy
1199                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1200                 }
1201
1202                 if ( count( $this->mKeywords ) > 0 ) {
1203                         $strip = array(
1204                                 "/<.*?>/" => '',
1205                                 "/_/" => ' '
1206                         );
1207                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1208                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1209                 }
1210                 foreach ( $this->mLinktags as $tag ) {
1211                         $ret .= "\t\t<link";
1212                         foreach( $tag as $attr => $val ) {
1213                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1214                         }
1215                         $ret .= " />\n";
1216                 }
1217                 if( $this->isSyndicated() ) {
1218                         # FIXME: centralize the mime-type and name information in Feed.php
1219                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1220                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1221                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1222                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 1.0' href='$link' />\n";
1223                 }
1224
1225                 return $ret;
1226         }
1227
1228         /**
1229          * Turn off regular page output and return an error reponse
1230          * for when rate limiting has triggered.
1231          * @todo i18n
1232          */
1233         public function rateLimited() {
1234                 global $wgOut;
1235                 $wgOut->disable();
1236                 wfHttpError( 500, 'Internal Server Error',
1237                         'Sorry, the server has encountered an internal error. ' .
1238                         'Please wait a moment and hit "refresh" to submit the request again.' );
1239         }
1240
1241         /**
1242          * Show an "add new section" link?
1243          *
1244          * @return bool True if the parser output instructs us to add one
1245          */
1246         public function showNewSectionLink() {
1247                 return $this->mNewSectionLink;
1248         }
1249
1250         /**
1251          * Show a warning about slave lag
1252          *
1253          * If the lag is higher than 30 seconds, then the warning is
1254          * a bit more obvious
1255          *
1256          * @param int $lag Slave lag
1257          */
1258         public function showLagWarning( $lag ) {
1259                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1260
1261                 if ($lag < $wgSlaveLagWarning)
1262                         return;
1263
1264                 $message = ($lag >= $wgSlaveLagCritical) ? 'lag-warn-high' : 'lag-warn-normal';
1265                 $warning = wfMsgHtml( $message, htmlspecialchars( $lag ) );
1266                 $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1267         }
1268
1269 }
1270
1271 ?>