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         var $mPageTitleActionText = '';
  32
  33         /**
  34          * Constructor
  35          * Initialise private variables
  36          */
  37         function __construct() {
  38                 global $wgAllowUserJs;
  39                 $this->mAllowUserJs = $wgAllowUserJs;
  40                 $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
  41                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  42                 $this->mRedirect = $this->mLastModified =
  43                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  44                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  45                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  46                 $this->mSuppressQuickbar = $this->mPrintable = false;
  47                 $this->mLanguageLinks = array();
  48                 $this->mCategoryLinks = array();
  49                 $this->mDoNothing = false;
  50                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  51                 $this->mParserOptions = null;
  52                 $this->mSquidMaxage = 0;
  53                 $this->mScripts = '';
  54                 $this->mHeadItems = array();
  55                 $this->mETag = false;
  56                 $this->mRevisionId = null;
  57                 $this->mNewSectionLink = false;
  58                 $this->mTemplateIds = 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
 162                         wfSuppressWarnings(); // E_STRICT system time bitching
 163                         $modsinceTime = strtotime( $modsince );
 164                         wfRestoreWarnings();
 165
 166                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 167                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 168                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 169                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 170                                 # Make sure you're in a place you can leave when you call us!
 171                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 172                                 $this->mLastModified = $lastmod;
 173                                 $this->sendCacheControl();
 174                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 175                                 $this->disable();
 176
 177                                 // Don't output a compressed blob when using ob_gzhandler;
 178                                 // it's technically against HTTP spec and seems to confuse
 179                                 // Firefox when the response gets split over two packets.
 180                                 wfClearOutputBuffers();
 181
 182                                 return true;
 183                         } else {
 184                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 185                                 $this->mLastModified = $lastmod;
 186                         }
 187                 } else {
 188                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 189                         $this->mLastModified = $lastmod;
 190                 }
 191         }
 192
 193         function setPageTitleActionText( $text ) {
 194                 $this->mPageTitleActionText = $text;
 195         }
 196
 197         function getPageTitleActionText () {
 198                 if ( isset( $this->mPageTitleActionText ) ) {
 199                         return $this->mPageTitleActionText;
 200                 }
 201         }
 202
 203         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 204         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 205         public function setPageTitle( $name ) {
 206                 global $action, $wgContLang;
 207                 $name = $wgContLang->convert($name, true);
 208                 $this->mPagetitle = $name;
 209                 if(!empty($action)) {
 210                         $taction =  $this->getPageTitleActionText();
 211                         if( !empty( $taction ) ) {
 212                                 $name .= ' - '.$taction;
 213                         }
 214                 }
 215
 216                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 217         }
 218         public function getHTMLTitle() { return $this->mHTMLtitle; }
 219         public function getPageTitle() { return $this->mPagetitle; }
 220         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 221         public function getSubtitle() { return $this->mSubtitle; }
 222         public function isArticle() { return $this->mIsarticle; }
 223         public function setPrintable() { $this->mPrintable = true; }
 224         public function isPrintable() { return $this->mPrintable; }
 225         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 226         public function isSyndicated() { return $this->mShowFeedLinks; }
 227         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 228         public function getOnloadHandler() { return $this->mOnloadHandler; }
 229         public function disable() { $this->mDoNothing = true; }
 230
 231         public function setArticleRelated( $v ) {
 232                 $this->mIsArticleRelated = $v;
 233                 if ( !$v ) {
 234                         $this->mIsarticle = false;
 235                 }
 236         }
 237         public function setArticleFlag( $v ) {
 238                 $this->mIsarticle = $v;
 239                 if ( $v ) {
 240                         $this->mIsArticleRelated = $v;
 241                 }
 242         }
 243
 244         public function isArticleRelated() { return $this->mIsArticleRelated; }
 245
 246         public function getLanguageLinks() { return $this->mLanguageLinks; }
 247         public function addLanguageLinks($newLinkArray) {
 248                 $this->mLanguageLinks += $newLinkArray;
 249         }
 250         public function setLanguageLinks($newLinkArray) {
 251                 $this->mLanguageLinks = $newLinkArray;
 252         }
 253
 254         public function getCategoryLinks() {
 255                 return $this->mCategoryLinks;
 256         }
 257
 258         /**
 259          * Add an array of categories, with names in the keys
 260          */
 261         public function addCategoryLinks($categories) {
 262                 global $wgUser, $wgContLang;
 263
 264                 if ( !is_array( $categories ) ) {
 265                         return;
 266                 }
 267                 # Add the links to the link cache in a batch
 268                 $arr = array( NS_CATEGORY => $categories );
 269                 $lb = new LinkBatch;
 270                 $lb->setArray( $arr );
 271                 $lb->execute();
 272
 273                 $sk = $wgUser->getSkin();
 274                 foreach ( $categories as $category => $unused ) {
 275                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 276                         $text = $wgContLang->convertHtml( $title->getText() );
 277                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 278                 }
 279         }
 280
 281         public function setCategoryLinks($categories) {
 282                 $this->mCategoryLinks = array();
 283                 $this->addCategoryLinks($categories);
 284         }
 285
 286         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 287         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 288
 289         public function disallowUserJs() { $this->mAllowUserJs = false; }
 290         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 291
 292         public function addHTML( $text ) { $this->mBodytext .= $text; }
 293         public function clearHTML() { $this->mBodytext = ''; }
 294         public function getHTML() { return $this->mBodytext; }
 295         public function debug( $text ) { $this->mDebugtext .= $text; }
 296
 297         /* @deprecated */
 298         public function setParserOptions( $options ) {
 299                 return $this->parserOptions( $options );
 300         }
 301
 302         public function parserOptions( $options = null ) {
 303                 if ( !$this->mParserOptions ) {
 304                         $this->mParserOptions = new ParserOptions;
 305                 }
 306                 return wfSetVar( $this->mParserOptions, $options );
 307         }
 308
 309         /**
 310          * Set the revision ID which will be seen by the wiki text parser
 311          * for things such as embedded {{REVISIONID}} variable use.
 312          * @param mixed $revid an integer, or NULL
 313          * @return mixed previous value
 314          */
 315         public function setRevisionId( $revid ) {
 316                 $val = is_null( $revid ) ? null : intval( $revid );
 317                 return wfSetVar( $this->mRevisionId, $val );
 318         }
 319
 320         /**
 321          * Convert wikitext to HTML and add it to the buffer
 322          * Default assumes that the current page title will
 323          * be used.
 324          *
 325          * @param string $text
 326          * @param bool   $linestart
 327          */
 328         public function addWikiText( $text, $linestart = true ) {
 329                 global $wgTitle;
 330                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 331         }
 332
 333         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 334                 $this->addWikiTextTitle($text, $title, $linestart);
 335         }
 336
 337         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 338                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 339         }
 340
 341         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 342                 global $wgParser;
 343
 344                 $fname = 'OutputPage:addWikiTextTitle';
 345                 wfProfileIn($fname);
 346
 347                 wfIncrStats('pcache_not_possible');
 348
 349                 $popts = $this->parserOptions();
 350                 $popts->setTidy($tidy);
 351
 352                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 353                         $linestart, true, $this->mRevisionId );
 354
 355                 $this->addParserOutput( $parserOutput );
 356
 357                 wfProfileOut($fname);
 358         }
 359
 360         /**
 361          * @todo document
 362          * @param ParserOutput object &$parserOutput
 363          */
 364         public function addParserOutputNoText( &$parserOutput ) {
 365                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 366                 $this->addCategoryLinks( $parserOutput->getCategories() );
 367                 $this->mNewSectionLink = $parserOutput->getNewSection();
 368                 $this->addKeywords( $parserOutput );
 369                 if ( $parserOutput->getCacheTime() == -1 ) {
 370                         $this->enableClientCache( false );
 371                 }
 372                 $this->mNoGallery = $parserOutput->getNoGallery();
 373                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 374                 // Versioning...
 375                 $this->mTemplateIds += (array)$parserOutput->mTemplateIds;
 376
 377                 # Display title
 378                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 379                         $this->setPageTitle( $dt );
 380
 381                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 382         }
 383
 384         /**
 385          * @todo document
 386          * @param ParserOutput &$parserOutput
 387          */
 388         function addParserOutput( &$parserOutput ) {
 389                 $this->addParserOutputNoText( $parserOutput );
 390                 $text = $parserOutput->getText();
 391                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 392                 $this->addHTML( $text );
 393         }
 394
 395         /**
 396          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 397          * Saves the text into the parser cache if possible.
 398          *
 399          * @param string  $text
 400          * @param Article $article
 401          * @param bool    $cache
 402          * @deprecated Use Article::outputWikitext
 403          */
 404         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 405                 global $wgParser, $wgUser;
 406
 407                 $popts = $this->parserOptions();
 408                 $popts->setTidy(true);
 409                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 410                         $popts, true, true, $this->mRevisionId );
 411                 $popts->setTidy(false);
 412                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 413                         $parserCache =& ParserCache::singleton();
 414                         $parserCache->save( $parserOutput, $article, $wgUser );
 415                 }
 416
 417                 $this->addParserOutput( $parserOutput );
 418         }
 419
 420         /**
 421          * @deprecated use addWikiTextTidy()
 422          */
 423         public function addSecondaryWikiText( $text, $linestart = true ) {
 424                 global $wgTitle;
 425                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 426         }
 427
 428         /**
 429          * Add wikitext with tidy enabled
 430          */
 431         public function addWikiTextTidy(  $text, $linestart = true ) {
 432                 global $wgTitle;
 433                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 434         }
 435
 436
 437         /**
 438          * Add the output of a QuickTemplate to the output buffer
 439          *
 440          * @param QuickTemplate $template
 441          */
 442         public function addTemplate( &$template ) {
 443                 ob_start();
 444                 $template->execute();
 445                 $this->addHTML( ob_get_contents() );
 446                 ob_end_clean();
 447         }
 448
 449         /**
 450          * Parse wikitext and return the HTML.
 451          *
 452          * @param string $text
 453          * @param bool   $linestart Is this the start of a line?
 454          * @param bool   $interface ??
 455          */
 456         public function parse( $text, $linestart = true, $interface = false ) {
 457                 global $wgParser, $wgTitle;
 458                 $popts = $this->parserOptions();
 459                 if ( $interface) { $popts->setInterfaceMessage(true); }
 460                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 461                         $linestart, true, $this->mRevisionId );
 462                 if ( $interface) { $popts->setInterfaceMessage(false); }
 463                 return $parserOutput->getText();
 464         }
 465
 466         /**
 467          * @param Article $article
 468          * @param User    $user
 469          *
 470          * @return bool True if successful, else false.
 471          */
 472         public function tryParserCache( &$article, $user ) {
 473                 $parserCache =& ParserCache::singleton();
 474                 $parserOutput = $parserCache->get( $article, $user );
 475                 if ( $parserOutput !== false ) {
 476                         $this->addParserOutput( $parserOutput );
 477                         return true;
 478                 } else {
 479                         return false;
 480                 }
 481         }
 482
 483         /**
 484          * @param int $maxage Maximum cache time on the Squid, in seconds.
 485          */
 486         public function setSquidMaxage( $maxage ) {
 487                 $this->mSquidMaxage = $maxage;
 488         }
 489
 490         /**
 491          * Use enableClientCache(false) to force it to send nocache headers
 492          * @param $state ??
 493          */
 494         public function enableClientCache( $state ) {
 495                 return wfSetVar( $this->mEnableClientCache, $state );
 496         }
 497
 498         function uncacheableBecauseRequestvars() {
 499                 global $wgRequest;
 500                 return  $wgRequest->getText('useskin', false) === false
 501                         && $wgRequest->getText('uselang', false) === false;
 502         }
 503
 504         public function sendCacheControl() {
 505                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 506                 $fname = 'OutputPage::sendCacheControl';
 507
 508                 if ($wgUseETag && $this->mETag)
 509                         $wgRequest->response()->header("ETag: $this->mETag");
 510
 511                 # don't serve compressed data to clients who can't handle it
 512                 # maintain different caches for logged-in users and non-logged in ones
 513                 $wgRequest->response()->header( 'Vary: Accept-Encoding, Cookie' );
 514                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 515                         if( $wgUseSquid && session_id() == '' &&
 516                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 517                         {
 518                                 if ( $wgUseESI ) {
 519                                         # We'll purge the proxy cache explicitly, but require end user agents
 520                                         # to revalidate against the proxy on each visit.
 521                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 522                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 523                                         # start with a shorter timeout for initial testing
 524                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 525                                         $wgRequest->response()->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 526                                         $wgRequest->response()->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 527                                 } else {
 528                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 529                                         # to revalidate against the proxy on each visit.
 530                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 531                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 532                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 533                                         # start with a shorter timeout for initial testing
 534                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 535                                         $wgRequest->response()->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 536                                 }
 537                         } else {
 538                                 # We do want clients to cache if they can, but they *must* check for updates
 539                                 # on revisiting the page.
 540                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 541                                 $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 542                                 $wgRequest->response()->header( "Cache-Control: private, must-revalidate, max-age=0" );
 543                         }
 544                         if($this->mLastModified) $wgRequest->response()->header( "Last-modified: {$this->mLastModified}" );
 545                 } else {
 546                         wfDebug( "$fname: no caching **\n", false );
 547
 548                         # In general, the absence of a last modified header should be enough to prevent
 549                         # the client from using its cache. We send a few other things just to make sure.
 550                         $wgRequest->response()->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 551                         $wgRequest->response()->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 552                         $wgRequest->response()->header( 'Pragma: no-cache' );
 553                 }
 554         }
 555
 556         /**
 557          * Finally, all the text has been munged and accumulated into
 558          * the object, let's actually output it:
 559          */
 560         public function output() {
 561                 global $wgUser, $wgOutputEncoding, $wgRequest;
 562                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 563                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 564                 global $wgServer, $wgStyleVersion;
 565
 566                 if( $this->mDoNothing ){
 567                         return;
 568                 }
 569                 $fname = 'OutputPage::output';
 570                 wfProfileIn( $fname );
 571                 $sk = $wgUser->getSkin();
 572
 573                 if ( $wgUseAjax ) {
 574                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 575
 576                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 577
 578                         if( $wgAjaxSearch ) {
 579                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 580                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 581                         }
 582
 583                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 584                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 585                         }
 586                 }
 587
 588                 if ( '' != $this->mRedirect ) {
 589                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 590                                 # Standards require redirect URLs to be absolute
 591                                 global $wgServer;
 592                                 $this->mRedirect = $wgServer . $this->mRedirect;
 593                         }
 594                         if( $this->mRedirectCode == '301') {
 595                                 if( !$wgDebugRedirects ) {
 596                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 597                                 }
 598                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 599                         }
 600
 601                         $this->sendCacheControl();
 602
 603                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 604                         if( $wgDebugRedirects ) {
 605                                 $url = htmlspecialchars( $this->mRedirect );
 606                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 607                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 608                                 print "</body>\n</html>\n";
 609                         } else {
 610                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 611                         }
 612                         wfProfileOut( $fname );
 613                         return;
 614                 }
 615                 elseif ( $this->mStatusCode )
 616                 {
 617                         $statusMessage = array(
 618                                 100 => 'Continue',
 619                                 101 => 'Switching Protocols',
 620                                 102 => 'Processing',
 621                                 200 => 'OK',
 622                                 201 => 'Created',
 623                                 202 => 'Accepted',
 624                                 203 => 'Non-Authoritative Information',
 625                                 204 => 'No Content',
 626                                 205 => 'Reset Content',
 627                                 206 => 'Partial Content',
 628                                 207 => 'Multi-Status',
 629                                 300 => 'Multiple Choices',
 630                                 301 => 'Moved Permanently',
 631                                 302 => 'Found',
 632                                 303 => 'See Other',
 633                                 304 => 'Not Modified',
 634                                 305 => 'Use Proxy',
 635                                 307 => 'Temporary Redirect',
 636                                 400 => 'Bad Request',
 637                                 401 => 'Unauthorized',
 638                                 402 => 'Payment Required',
 639                                 403 => 'Forbidden',
 640                                 404 => 'Not Found',
 641                                 405 => 'Method Not Allowed',
 642                                 406 => 'Not Acceptable',
 643                                 407 => 'Proxy Authentication Required',
 644                                 408 => 'Request Timeout',
 645                                 409 => 'Conflict',
 646                                 410 => 'Gone',
 647                                 411 => 'Length Required',
 648                                 412 => 'Precondition Failed',
 649                                 413 => 'Request Entity Too Large',
 650                                 414 => 'Request-URI Too Large',
 651                                 415 => 'Unsupported Media Type',
 652                                 416 => 'Request Range Not Satisfiable',
 653                                 417 => 'Expectation Failed',
 654                                 422 => 'Unprocessable Entity',
 655                                 423 => 'Locked',
 656                                 424 => 'Failed Dependency',
 657                                 500 => 'Internal Server Error',
 658                                 501 => 'Not Implemented',
 659                                 502 => 'Bad Gateway',
 660                                 503 => 'Service Unavailable',
 661                                 504 => 'Gateway Timeout',
 662                                 505 => 'HTTP Version Not Supported',
 663                                 507 => 'Insufficient Storage'
 664                         );
 665
 666                         if ( $statusMessage[$this->mStatusCode] )
 667                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 668                 }
 669
 670                 # Buffer output; final headers may depend on later processing
 671                 ob_start();
 672
 673                 # Disable temporary placeholders, so that the skin produces HTML
 674                 $sk->postParseLinkColour( false );
 675
 676                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 677                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 678
 679                 if ($this->mArticleBodyOnly) {
 680                         $this->out($this->mBodytext);
 681                 } else {
 682                         wfProfileIn( 'Output-skin' );
 683                         $sk->outputPage( $this );
 684                         wfProfileOut( 'Output-skin' );
 685                 }
 686
 687                 $this->sendCacheControl();
 688                 ob_end_flush();
 689                 wfProfileOut( $fname );
 690         }
 691
 692         /**
 693          * @todo document
 694          * @param string $ins
 695          */
 696         public function out( $ins ) {
 697                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 698                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 699                         $outs = $ins;
 700                 } else {
 701                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 702                         if ( false === $outs ) { $outs = $ins; }
 703                 }
 704                 print $outs;
 705         }
 706
 707         /**
 708          * @todo document
 709          */
 710         public static function setEncodings() {
 711                 global $wgInputEncoding, $wgOutputEncoding;
 712                 global $wgUser, $wgContLang;
 713
 714                 $wgInputEncoding = strtolower( $wgInputEncoding );
 715
 716                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 717                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 718                         return;
 719                 }
 720                 $wgOutputEncoding = $wgInputEncoding;
 721         }
 722
 723         /**
 724          * Deprecated, use wfReportTime() instead.
 725          * @return string
 726          * @deprecated
 727          */
 728         public function reportTime() {
 729                 $time = wfReportTime();
 730                 return $time;
 731         }
 732
 733         /**
 734          * Produce a "user is blocked" page.
 735          *
 736          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 737          * @return nothing
 738          */
 739         function blockedPage( $return = true ) {
 740                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 741
 742                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 743                 $this->setRobotpolicy( 'noindex,nofollow' );
 744                 $this->setArticleRelated( false );
 745
 746                 $id = $wgUser->blockedBy();
 747                 $reason = $wgUser->blockedFor();
 748                 $ip = wfGetIP();
 749
 750                 if ( is_numeric( $id ) ) {
 751                         $name = User::whoIs( $id );
 752                 } else {
 753                         $name = $id;
 754                 }
 755                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 756
 757                 $blockid = $wgUser->mBlock->mId;
 758
 759                 $blockExpiry = $wgUser->mBlock->mExpiry;
 760                 if ( $blockExpiry == 'infinity' ) {
 761                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 762                         // Search for localization in 'ipboptions'
 763                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 764                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 765                                 if ( strpos( $option, ":" ) === false )
 766                                         continue;
 767                                 list( $show, $value ) = explode( ":", $option );
 768                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 769                                         $blockExpiry = $show;
 770                                         break;
 771                                 }
 772                         }
 773                 } else {
 774                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 775                 }
 776
 777                 if ( $wgUser->mBlock->mAuto ) {
 778                         $msg = 'autoblockedtext';
 779                 } else {
 780                         $msg = 'blockedtext';
 781                 }
 782
 783                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
 784                  * This could be a username, an ip range, or a single ip. */
 785                 $intended = $wgUser->mBlock->mAddress;
 786
 787                 $this->addWikiText( wfMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended ) );
 788
 789                 # Don't auto-return to special pages
 790                 if( $return ) {
 791                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 792                         $this->returnToMain( false, $return );
 793                 }
 794         }
 795
 796         /**
 797          * Output a standard error page
 798          *
 799          * @param string $title Message key for page title
 800          * @param string $msg Message key for page text
 801          * @param array $params Message parameters
 802          */
 803         public function showErrorPage( $title, $msg, $params = array() ) {
 804                 global $wgTitle;
 805
 806                 $this->mDebugtext .= 'Original title: ' .
 807                   $wgTitle->getPrefixedText() . "\n";
 808                 $this->setPageTitle( wfMsg( $title ) );
 809                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 810                 $this->setRobotpolicy( 'noindex,nofollow' );
 811                 $this->setArticleRelated( false );
 812                 $this->enableClientCache( false );
 813                 $this->mRedirect = '';
 814                 $this->mBodytext = '';
 815
 816                 array_unshift( $params, $msg );
 817                 $message = call_user_func_array( 'wfMsg', $params );
 818                 $this->addWikiText( $message );
 819
 820                 $this->returnToMain( false );
 821         }
 822
 823         /** @deprecated */
 824         public function errorpage( $title, $msg ) {
 825                 throw new ErrorPageError( $title, $msg );
 826         }
 827
 828         /**
 829          * Display an error page indicating that a given version of MediaWiki is
 830          * required to use it
 831          *
 832          * @param mixed $version The version of MediaWiki needed to use the page
 833          */
 834         public function versionRequired( $version ) {
 835                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 836                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 837                 $this->setRobotpolicy( 'noindex,nofollow' );
 838                 $this->setArticleRelated( false );
 839                 $this->mBodytext = '';
 840
 841                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 842                 $this->returnToMain();
 843         }
 844
 845         /**
 846          * Display an error page noting that a given permission bit is required.
 847          *
 848          * @param string $permission key required
 849          */
 850         public function permissionRequired( $permission ) {
 851                 global $wgGroupPermissions, $wgUser;
 852
 853                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 854                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 855                 $this->setRobotpolicy( 'noindex,nofollow' );
 856                 $this->setArticleRelated( false );
 857                 $this->mBodytext = '';
 858
 859                 $groups = array();
 860                 foreach( $wgGroupPermissions as $key => $value ) {
 861                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 862                                 $groupName = User::getGroupName( $key );
 863                                 $groupPage = User::getGroupPage( $key );
 864                                 if( $groupPage ) {
 865                                         $skin = $wgUser->getSkin();
 866                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
 867                                 } else {
 868                                         $groups[] = $groupName;
 869                                 }
 870                         }
 871                 }
 872                 $n = count( $groups );
 873                 $groups = implode( ', ', $groups );
 874                 switch( $n ) {
 875                         case 0:
 876                         case 1:
 877                         case 2:
 878                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 879                                 break;
 880                         default:
 881                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 882                 }
 883                 $this->addHtml( $message );
 884                 $this->returnToMain( false );
 885         }
 886
 887         /**
 888          * Use permissionRequired.
 889          * @deprecated
 890          */
 891         public function sysopRequired() {
 892                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 893         }
 894
 895         /**
 896          * Use permissionRequired.
 897          * @deprecated
 898          */
 899         public function developerRequired() {
 900                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 901         }
 902
 903         /**
 904          * Produce the stock "please login to use the wiki" page
 905          */
 906         public function loginToUse() {
 907                 global $wgUser, $wgTitle, $wgContLang;
 908
 909                 if( $wgUser->isLoggedIn() ) {
 910                         $this->permissionRequired( 'read' );
 911                         return;
 912                 }
 913
 914                 $skin = $wgUser->getSkin();
 915
 916                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 917                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
 918                 $this->setRobotPolicy( 'noindex,nofollow' );
 919                 $this->setArticleFlag( false );
 920
 921                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
 922                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
 923                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
 924                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
 925
 926                 # Don't return to the main page if the user can't read it
 927                 # otherwise we'll end up in a pointless loop
 928                 $mainPage = Title::newMainPage();
 929                 if( $mainPage->userCanRead() )
 930                         $this->returnToMain( true, $mainPage );
 931         }
 932
 933         /** @deprecated */
 934         public function databaseError( $fname, $sql, $error, $errno ) {
 935                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
 936         }
 937
 938         /**
 939          * @todo document
 940          * @param bool  $protected Is the reason the page can't be reached because it's protected?
 941          * @param mixed $source
 942          */
 943         public function readOnlyPage( $source = null, $protected = false ) {
 944                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 945                 $skin = $wgUser->getSkin();
 946
 947                 $this->setRobotpolicy( 'noindex,nofollow' );
 948                 $this->setArticleRelated( false );
 949
 950                 if( $protected ) {
 951                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 952                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 953                         list( $cascadeSources, /* $restrictions */ ) = $wgTitle->getCascadeProtectionSources();
 954
 955                         // Show an appropriate explanation depending upon the reason
 956                         // for the protection...all of these should be moved to the
 957                         // callers
 958                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 959                                 // User isn't allowed to edit the interface
 960                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 961                         } elseif( $cascadeSources && ( $count = count( $cascadeSources ) ) > 0 ) {
 962                                 // Cascading protection
 963                                         $titles = '';
 964                                         foreach( $cascadeSources as $title )
 965                                                 $titles .= "* [[:" . $title->getPrefixedText()  . "]]\n";
 966                                         $this->addWikiText( wfMsgExt( 'cascadeprotected', 'parsemag', $count ) . "\n{$titles}" );
 967                         } elseif( !$wgTitle->isProtected( 'edit' ) && $wgTitle->isNamespaceProtected() ) {
 968                                 // Namespace protection
 969                                 global $wgNamespaceProtection;
 970                                 $ns = $wgTitle->getNamespace() == NS_MAIN
 971                                         ? wfMsg( 'nstab-main' )
 972                                         : $wgTitle->getNsText();
 973                                 $this->addWikiText( wfMsg( 'namespaceprotected', $ns ) );
 974                         } else {
 975                                 // Standard protection
 976                                 $this->addWikiText( wfMsg( 'protectedpagetext' ) );
 977                         }
 978                 } else {
 979                         $this->setPageTitle( wfMsg( 'readonly' ) );
 980                         if ( $wgReadOnly ) {
 981                                 $reason = $wgReadOnly;
 982                         } else {
 983                                 $reason = file_get_contents( $wgReadOnlyFile );
 984                         }
 985                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 986                 }
 987
 988                 if( is_string( $source ) ) {
 989                         $this->addWikiText( wfMsg( 'viewsourcetext' ) );
 990                         $rows = $wgUser->getIntOption( 'rows' );
 991                         $cols = $wgUser->getIntOption( 'cols' );
 992                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
 993                                 htmlspecialchars( $source ) . "\n</textarea>";
 994                         $this->addHTML( $text );
 995                 }
 996                 $article = new Article( $wgTitle );
 997                 $this->addHTML( $skin->formatTemplates( $article->getUsedTemplates() ) );
 998
 999                 $this->returnToMain( false );
1000         }
1001
1002         /** @deprecated */
1003         public function fatalError( $message ) {
1004                 throw new FatalError( $message );
1005         }
1006
1007         /** @deprecated */
1008         public function unexpectedValueError( $name, $val ) {
1009                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1010         }
1011
1012         /** @deprecated */
1013         public function fileCopyError( $old, $new ) {
1014                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1015         }
1016
1017         /** @deprecated */
1018         public function fileRenameError( $old, $new ) {
1019                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1020         }
1021
1022         /** @deprecated */
1023         public function fileDeleteError( $name ) {
1024                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1025         }
1026
1027         /** @deprecated */
1028         public function fileNotFoundError( $name ) {
1029                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1030         }
1031
1032         public function showFatalError( $message ) {
1033                 $this->setPageTitle( wfMsg( "internalerror" ) );
1034                 $this->setRobotpolicy( "noindex,nofollow" );
1035                 $this->setArticleRelated( false );
1036                 $this->enableClientCache( false );
1037                 $this->mRedirect = '';
1038                 $this->mBodytext = $message;
1039         }
1040
1041         public function showUnexpectedValueError( $name, $val ) {
1042                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1043         }
1044
1045         public function showFileCopyError( $old, $new ) {
1046                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1047         }
1048
1049         public function showFileRenameError( $old, $new ) {
1050                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1051         }
1052
1053         public function showFileDeleteError( $name ) {
1054                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1055         }
1056
1057         public function showFileNotFoundError( $name ) {
1058                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1059         }
1060
1061         /**
1062          * Add a "return to" link pointing to a specified title
1063          *
1064          * @param Title $title Title to link
1065          */
1066         public function addReturnTo( $title ) {
1067                 global $wgUser;
1068                 $link = wfMsg( 'returnto', $wgUser->getSkin()->makeLinkObj( $title ) );
1069                 $this->addHtml( "<p>{$link}</p>\n" );
1070         }
1071
1072         /**
1073          * Add a "return to" link pointing to a specified title,
1074          * or the title indicated in the request, or else the main page
1075          *
1076          * @param null $unused No longer used
1077          * @param Title $returnto Title to return to
1078          */
1079         public function returnToMain( $unused = null, $returnto = NULL ) {
1080                 global $wgRequest;
1081
1082                 if ( $returnto == NULL ) {
1083                         $returnto = $wgRequest->getText( 'returnto' );
1084                 }
1085
1086                 if ( '' === $returnto ) {
1087                         $returnto = Title::newMainPage();
1088                 }
1089
1090                 if ( is_object( $returnto ) ) {
1091                         $titleObj = $returnto;
1092                 } else {
1093                         $titleObj = Title::newFromText( $returnto );
1094                 }
1095                 if ( !is_object( $titleObj ) ) {
1096                         $titleObj = Title::newMainPage();
1097                 }
1098
1099                 $this->addReturnTo( $titleObj );
1100         }
1101
1102         /**
1103          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1104          * and uses the first 10 of them for META keywords
1105          *
1106          * @param ParserOutput &$parserOutput
1107          */
1108         private function addKeywords( &$parserOutput ) {
1109                 global $wgTitle;
1110                 $this->addKeyword( $wgTitle->getPrefixedText() );
1111                 $count = 1;
1112                 $links2d =& $parserOutput->getLinks();
1113                 if ( !is_array( $links2d ) ) {
1114                         return;
1115                 }
1116                 foreach ( $links2d as $dbkeys ) {
1117                         foreach( $dbkeys as $dbkey => $unused ) {
1118                                 $this->addKeyword( $dbkey );
1119                                 if ( ++$count > 10 ) {
1120                                         break 2;
1121                                 }
1122                         }
1123                 }
1124         }
1125
1126         /**
1127          * @return string The doctype, opening <html>, and head element.
1128          */
1129         public function headElement() {
1130                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1131                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1132                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1133
1134                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1135                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1136                 } else {
1137                         $ret = '';
1138                 }
1139
1140                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1141
1142                 if ( '' == $this->getHTMLTitle() ) {
1143                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1144                 }
1145
1146                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1147                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1148                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1149                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1150                 }
1151                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1152                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1153                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1154
1155                 $ret .= $this->getHeadLinks();
1156                 global $wgStylePath;
1157                 if( $this->isPrintable() ) {
1158                         $media = '';
1159                 } else {
1160                         $media = "media='print'";
1161                 }
1162                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1163                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1164
1165                 $sk = $wgUser->getSkin();
1166                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1167                 $ret .= $this->mScripts;
1168                 $ret .= $sk->getUserStyles();
1169                 $ret .= $this->getHeadItems();
1170
1171                 if ($wgUseTrackbacks && $this->isArticleRelated())
1172                         $ret .= $wgTitle->trackbackRDF();
1173
1174                 $ret .= "</head>\n";
1175                 return $ret;
1176         }
1177
1178         /**
1179          * @return string HTML tag links to be put in the header.
1180          */
1181         public function getHeadLinks() {
1182                 global $wgRequest;
1183                 $ret = '';
1184                 foreach ( $this->mMetatags as $tag ) {
1185                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1186                                 $a = 'http-equiv';
1187                                 $tag[0] = substr( $tag[0], 5 );
1188                         } else {
1189                                 $a = 'name';
1190                         }
1191                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1192                 }
1193
1194                 $p = $this->mRobotpolicy;
1195                 if( $p !== '' && $p != 'index,follow' ) {
1196                         // http://www.robotstxt.org/wc/meta-user.html
1197                         // Only show if it's different from the default robots policy
1198                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1199                 }
1200
1201                 if ( count( $this->mKeywords ) > 0 ) {
1202                         $strip = array(
1203                                 "/<.*?>/" => '',
1204                                 "/_/" => ' '
1205                         );
1206                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1207                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1208                 }
1209                 foreach ( $this->mLinktags as $tag ) {
1210                         $ret .= "\t\t<link";
1211                         foreach( $tag as $attr => $val ) {
1212                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1213                         }
1214                         $ret .= " />\n";
1215                 }
1216                 if( $this->isSyndicated() ) {
1217                         # FIXME: centralize the mime-type and name information in Feed.php
1218                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1219                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1220                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1221                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 1.0' href='$link' />\n";
1222                 }
1223
1224                 return $ret;
1225         }
1226
1227         /**
1228          * Turn off regular page output and return an error reponse
1229          * for when rate limiting has triggered.
1230          * @todo i18n
1231          */
1232         public function rateLimited() {
1233                 global $wgOut;
1234                 $wgOut->disable();
1235                 wfHttpError( 500, 'Internal Server Error',
1236                         'Sorry, the server has encountered an internal error. ' .
1237                         'Please wait a moment and hit "refresh" to submit the request again.' );
1238         }
1239
1240         /**
1241          * Show an "add new section" link?
1242          *
1243          * @return bool True if the parser output instructs us to add one
1244          */
1245         public function showNewSectionLink() {
1246                 return $this->mNewSectionLink;
1247         }
1248
1249         /**
1250          * Show a warning about slave lag
1251          *
1252          * If the lag is higher than 30 seconds, then the warning is
1253          * a bit more obvious
1254          *
1255          * @param int $lag Slave lag
1256          */
1257         public function showLagWarning( $lag ) {
1258                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1259
1260                 if ($lag < $wgSlaveLagWarning)
1261                         return;
1262
1263                 $message = ($lag >= $wgSlaveLagCritical) ? 'lag-warn-high' : 'lag-warn-normal';
1264                 $warning = wfMsgHtml( $message, htmlspecialchars( $lag ) );
1265                 $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1266         }
1267
1268 }
1269
1270