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