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 $mFeedLinksAppendQuery = false;
  27         var $mEnableClientCache = true;
  28         var $mArticleBodyOnly = false;
  29
  30         var $mNewSectionLink = false;
  31         var $mNoGallery = false;
  32         var $mPageTitleActionText = '';
  33         var $mParseWarnings = array();
  34
  35         /**
  36          * Constructor
  37          * Initialise private variables
  38          */
  39         function __construct() {
  40                 global $wgAllowUserJs;
  41                 $this->mAllowUserJs = $wgAllowUserJs;
  42                 $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
  43                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  44                 $this->mRedirect = $this->mLastModified =
  45                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  46                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  47                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  48                 $this->mSuppressQuickbar = $this->mPrintable = false;
  49                 $this->mLanguageLinks = array();
  50                 $this->mCategoryLinks = array();
  51                 $this->mDoNothing = false;
  52                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  53                 $this->mParserOptions = null;
  54                 $this->mSquidMaxage = 0;
  55                 $this->mScripts = '';
  56                 $this->mHeadItems = array();
  57                 $this->mETag = false;
  58                 $this->mRevisionId = null;
  59                 $this->mNewSectionLink = false;
  60                 $this->mTemplateIds = array();
  61         }
  62
  63         public function redirect( $url, $responsecode = '302' ) {
  64                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  65                 $this->mRedirect = str_replace( "\n", '', $url );
  66                 $this->mRedirectCode = $responsecode;
  67         }
  68
  69         public function getRedirect() {
  70                 return $this->mRedirect;
  71         }
  72
  73         /**
  74          * Set the HTTP status code to send with the output.
  75          *
  76          * @param int $statusCode
  77          * @return nothing
  78          */
  79         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  80
  81         # To add an http-equiv meta tag, precede the name with "http:"
  82         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  83         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  84         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  85         function addStyle( $style ) {
  86                 global $wgStylePath, $wgStyleVersion;
  87                 $this->addLink(
  88                                 array(
  89                                         'rel' => 'stylesheet',
  90                                         'href' => $wgStylePath . '/' . $style . '?' . $wgStyleVersion ) );
  91         }
  92
  93         /**
  94          * Add a self-contained script tag with the given contents
  95          * @param string $script JavaScript text, no <script> tags
  96          */
  97         function addInlineScript( $script ) {
  98                 global $wgJsMimeType;
  99                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
 100         }
 101
 102         function getScript() {
 103                 return $this->mScripts . $this->getHeadItems();
 104         }
 105
 106         function getHeadItems() {
 107                 $s = '';
 108                 foreach ( $this->mHeadItems as $item ) {
 109                         $s .= $item;
 110                 }
 111                 return $s;
 112         }
 113
 114         function addHeadItem( $name, $value ) {
 115                 $this->mHeadItems[$name] = $value;
 116         }
 117
 118         function hasHeadItem( $name ) {
 119                 return isset( $this->mHeadItems[$name] );
 120         }
 121
 122         function setETag($tag) { $this->mETag = $tag; }
 123         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 124         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 125
 126         function addLink( $linkarr ) {
 127                 # $linkarr should be an associative array of attributes. We'll escape on output.
 128                 array_push( $this->mLinktags, $linkarr );
 129         }
 130
 131         function addMetadataLink( $linkarr ) {
 132                 # note: buggy CC software only reads first "meta" link
 133                 static $haveMeta = false;
 134                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 135                 $this->addLink( $linkarr );
 136                 $haveMeta = true;
 137         }
 138
 139         /**
 140          * checkLastModified tells the client to use the client-cached page if
 141          * possible. If sucessful, the OutputPage is disabled so that
 142          * any future call to OutputPage->output() have no effect.
 143          *
 144          * @return bool True iff cache-ok headers was sent.
 145          */
 146         function checkLastModified ( $timestamp ) {
 147                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 148
 149                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 150                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 151                         return;
 152                 }
 153                 if( !$wgCachePages ) {
 154                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 155                         return;
 156                 }
 157                 if( $wgUser->getOption( 'nocache' ) ) {
 158                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 159                         return;
 160                 }
 161
 162                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 163                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 164
 165                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 166                         # IE sends sizes after the date like this:
 167                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 168                         # this breaks strtotime().
 169                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 170
 171                         wfSuppressWarnings(); // E_STRICT system time bitching
 172                         $modsinceTime = strtotime( $modsince );
 173                         wfRestoreWarnings();
 174
 175                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 176                         wfDebug( __METHOD__ . ": -- client send If-Modified-Since: " . $modsince . "\n", false );
 177                         wfDebug( __METHOD__ . ": --  we might send Last-Modified : $lastmod\n", false );
 178                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 179                                 # Make sure you're in a place you can leave when you call us!
 180                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 181                                 $this->mLastModified = $lastmod;
 182                                 $this->sendCacheControl();
 183                                 wfDebug( __METHOD__ . ": CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 184                                 $this->disable();
 185
 186                                 // Don't output a compressed blob when using ob_gzhandler;
 187                                 // it's technically against HTTP spec and seems to confuse
 188                                 // Firefox when the response gets split over two packets.
 189                                 wfClearOutputBuffers();
 190
 191                                 return true;
 192                         } else {
 193                                 wfDebug( __METHOD__ . ": READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 194                                 $this->mLastModified = $lastmod;
 195                         }
 196                 } else {
 197                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 198                         $this->mLastModified = $lastmod;
 199                 }
 200         }
 201
 202         function setPageTitleActionText( $text ) {
 203                 $this->mPageTitleActionText = $text;
 204         }
 205
 206         function getPageTitleActionText () {
 207                 if ( isset( $this->mPageTitleActionText ) ) {
 208                         return $this->mPageTitleActionText;
 209                 }
 210         }
 211
 212         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 213         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 214         public function setPageTitle( $name ) {
 215                 global $action, $wgContLang;
 216                 $name = $wgContLang->convert($name, true);
 217                 $this->mPagetitle = $name;
 218                 if(!empty($action)) {
 219                         $taction =  $this->getPageTitleActionText();
 220                         if( !empty( $taction ) ) {
 221                                 $name .= ' - '.$taction;
 222                         }
 223                 }
 224
 225                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 226         }
 227         public function getHTMLTitle() { return $this->mHTMLtitle; }
 228         public function getPageTitle() { return $this->mPagetitle; }
 229         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 230         public function getSubtitle() { return $this->mSubtitle; }
 231         public function isArticle() { return $this->mIsarticle; }
 232         public function setPrintable() { $this->mPrintable = true; }
 233         public function isPrintable() { return $this->mPrintable; }
 234         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 235         public function isSyndicated() { return $this->mShowFeedLinks; }
 236         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 237         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 238         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 239         public function getOnloadHandler() { return $this->mOnloadHandler; }
 240         public function disable() { $this->mDoNothing = true; }
 241
 242         public function setArticleRelated( $v ) {
 243                 $this->mIsArticleRelated = $v;
 244                 if ( !$v ) {
 245                         $this->mIsarticle = false;
 246                 }
 247         }
 248         public function setArticleFlag( $v ) {
 249                 $this->mIsarticle = $v;
 250                 if ( $v ) {
 251                         $this->mIsArticleRelated = $v;
 252                 }
 253         }
 254
 255         public function isArticleRelated() { return $this->mIsArticleRelated; }
 256
 257         public function getLanguageLinks() { return $this->mLanguageLinks; }
 258         public function addLanguageLinks($newLinkArray) {
 259                 $this->mLanguageLinks += $newLinkArray;
 260         }
 261         public function setLanguageLinks($newLinkArray) {
 262                 $this->mLanguageLinks = $newLinkArray;
 263         }
 264
 265         public function getCategoryLinks() {
 266                 return $this->mCategoryLinks;
 267         }
 268
 269         /**
 270          * Add an array of categories, with names in the keys
 271          */
 272         public function addCategoryLinks( $categories ) {
 273                 global $wgUser, $wgContLang;
 274
 275                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 276                         return;
 277                 }
 278
 279                 # Add the links to a LinkBatch
 280                 $arr = array( NS_CATEGORY => $categories );
 281                 $lb = new LinkBatch;
 282                 $lb->setArray( $arr );
 283
 284                 # Fetch existence plus the hiddencat property
 285                 $dbr = wfGetDB( DB_SLAVE );
 286                 $pageTable = $dbr->tableName( 'page' );
 287                 $where = $lb->constructSet( 'page', $dbr );
 288                 $propsTable = $dbr->tableName( 'page_props' );
 289                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 290                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 291                 $res = $dbr->query( $sql, __METHOD__ );
 292
 293                 # Add the results to the link cache
 294                 $lb->addResultToCache( LinkCache::singleton(), $res );
 295
 296                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 297                 $categories = array_combine( array_keys( $categories ),
 298                         array_fill( 0, count( $categories ), 'normal' ) );
 299
 300                 # Mark hidden categories
 301                 foreach ( $res as $row ) {
 302                         if ( isset( $row->pp_value ) ) {
 303                                 $categories[$row->page_title] = 'hidden';
 304                         }
 305                 }
 306
 307                 # Add the remaining categories to the skin
 308                 $sk = $wgUser->getSkin();
 309                 foreach ( $categories as $category => $type ) {
 310                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 311                         $text = $wgContLang->convertHtml( $title->getText() );
 312                         $this->mCategoryLinks[$type][] = $sk->makeLinkObj( $title, $text );
 313                 }
 314         }
 315
 316         public function setCategoryLinks($categories) {
 317                 $this->mCategoryLinks = array();
 318                 $this->addCategoryLinks($categories);
 319         }
 320
 321         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 322         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 323
 324         public function disallowUserJs() { $this->mAllowUserJs = false; }
 325         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 326
 327         public function addHTML( $text ) { $this->mBodytext .= $text; }
 328         public function clearHTML() { $this->mBodytext = ''; }
 329         public function getHTML() { return $this->mBodytext; }
 330         public function debug( $text ) { $this->mDebugtext .= $text; }
 331
 332         /* @deprecated */
 333         public function setParserOptions( $options ) {
 334                 wfDeprecated( __METHOD__ );
 335                 return $this->parserOptions( $options );
 336         }
 337
 338         public function parserOptions( $options = null ) {
 339                 if ( !$this->mParserOptions ) {
 340                         $this->mParserOptions = new ParserOptions;
 341                 }
 342                 return wfSetVar( $this->mParserOptions, $options );
 343         }
 344
 345         /**
 346          * Set the revision ID which will be seen by the wiki text parser
 347          * for things such as embedded {{REVISIONID}} variable use.
 348          * @param mixed $revid an integer, or NULL
 349          * @return mixed previous value
 350          */
 351         public function setRevisionId( $revid ) {
 352                 $val = is_null( $revid ) ? null : intval( $revid );
 353                 return wfSetVar( $this->mRevisionId, $val );
 354         }
 355
 356         /**
 357          * Convert wikitext to HTML and add it to the buffer
 358          * Default assumes that the current page title will
 359          * be used.
 360          *
 361          * @param string $text
 362          * @param bool   $linestart
 363          */
 364         public function addWikiText( $text, $linestart = true ) {
 365                 global $wgTitle;
 366                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 367         }
 368
 369         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 370                 $this->addWikiTextTitle($text, $title, $linestart);
 371         }
 372
 373         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 374                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 375         }
 376
 377         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 378                 global $wgParser;
 379
 380                 wfProfileIn( __METHOD__ );
 381
 382                 wfIncrStats( 'pcache_not_possible' );
 383
 384                 $popts = $this->parserOptions();
 385                 $oldTidy = $popts->setTidy( $tidy );
 386
 387                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 388                         $linestart, true, $this->mRevisionId );
 389
 390                 $popts->setTidy( $oldTidy );
 391
 392                 $this->addParserOutput( $parserOutput );
 393
 394                 wfProfileOut( __METHOD__ );
 395         }
 396
 397         /**
 398          * @todo document
 399          * @param ParserOutput object &$parserOutput
 400          */
 401         public function addParserOutputNoText( &$parserOutput ) {
 402                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 403                 $this->addCategoryLinks( $parserOutput->getCategories() );
 404                 $this->mNewSectionLink = $parserOutput->getNewSection();
 405                 $this->addKeywords( $parserOutput );
 406                 $this->mParseWarnings = $parserOutput->getWarnings();
 407                 if ( $parserOutput->getCacheTime() == -1 ) {
 408                         $this->enableClientCache( false );
 409                 }
 410                 $this->mNoGallery = $parserOutput->getNoGallery();
 411                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 412                 // Versioning...
 413                 $this->mTemplateIds += (array)$parserOutput->mTemplateIds;
 414
 415                 // Display title
 416                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 417                         $this->setPageTitle( $dt );
 418
 419                 // Hooks registered in the object
 420                 global $wgParserOutputHooks;
 421                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 422                         list( $hookName, $data ) = $hookInfo;
 423                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 424                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 425                         }
 426                 }
 427
 428                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 429         }
 430
 431         /**
 432          * @todo document
 433          * @param ParserOutput &$parserOutput
 434          */
 435         function addParserOutput( &$parserOutput ) {
 436                 $this->addParserOutputNoText( $parserOutput );
 437                 $text = $parserOutput->getText();
 438                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 439                 $this->addHTML( $text );
 440         }
 441
 442         /**
 443          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 444          * Saves the text into the parser cache if possible.
 445          *
 446          * @param string  $text
 447          * @param Article $article
 448          * @param bool    $cache
 449          * @deprecated Use Article::outputWikitext
 450          */
 451         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 452                 global $wgParser, $wgUser;
 453
 454                 wfDeprecated( __METHOD__ );
 455
 456                 $popts = $this->parserOptions();
 457                 $popts->setTidy(true);
 458                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 459                         $popts, true, true, $this->mRevisionId );
 460                 $popts->setTidy(false);
 461                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 462                         $parserCache = ParserCache::singleton();
 463                         $parserCache->save( $parserOutput, $article, $wgUser );
 464                 }
 465
 466                 $this->addParserOutput( $parserOutput );
 467         }
 468
 469         /**
 470          * @deprecated use addWikiTextTidy()
 471          */
 472         public function addSecondaryWikiText( $text, $linestart = true ) {
 473                 global $wgTitle;
 474                 wfDeprecated( __METHOD__ );
 475                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 476         }
 477
 478         /**
 479          * Add wikitext with tidy enabled
 480          */
 481         public function addWikiTextTidy(  $text, $linestart = true ) {
 482                 global $wgTitle;
 483                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 484         }
 485
 486
 487         /**
 488          * Add the output of a QuickTemplate to the output buffer
 489          *
 490          * @param QuickTemplate $template
 491          */
 492         public function addTemplate( &$template ) {
 493                 ob_start();
 494                 $template->execute();
 495                 $this->addHTML( ob_get_contents() );
 496                 ob_end_clean();
 497         }
 498
 499         /**
 500          * Parse wikitext and return the HTML.
 501          *
 502          * @param string $text
 503          * @param bool   $linestart Is this the start of a line?
 504          * @param bool   $interface ??
 505          */
 506         public function parse( $text, $linestart = true, $interface = false ) {
 507                 global $wgParser, $wgTitle;
 508                 $popts = $this->parserOptions();
 509                 if ( $interface) { $popts->setInterfaceMessage(true); }
 510                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 511                         $linestart, true, $this->mRevisionId );
 512                 if ( $interface) { $popts->setInterfaceMessage(false); }
 513                 return $parserOutput->getText();
 514         }
 515
 516         /**
 517          * @param Article $article
 518          * @param User    $user
 519          *
 520          * @return bool True if successful, else false.
 521          */
 522         public function tryParserCache( &$article, $user ) {
 523                 $parserCache = ParserCache::singleton();
 524                 $parserOutput = $parserCache->get( $article, $user );
 525                 if ( $parserOutput !== false ) {
 526                         $this->addParserOutput( $parserOutput );
 527                         return true;
 528                 } else {
 529                         return false;
 530                 }
 531         }
 532
 533         /**
 534          * @param int $maxage Maximum cache time on the Squid, in seconds.
 535          */
 536         public function setSquidMaxage( $maxage ) {
 537                 $this->mSquidMaxage = $maxage;
 538         }
 539
 540         /**
 541          * Use enableClientCache(false) to force it to send nocache headers
 542          * @param $state ??
 543          */
 544         public function enableClientCache( $state ) {
 545                 return wfSetVar( $this->mEnableClientCache, $state );
 546         }
 547
 548         function getCacheVaryCookies() {
 549                 global $wgCookiePrefix, $wgCacheVaryCookies;
 550                 static $cookies;
 551                 if ( $cookies === null ) {
 552                         $cookies = array_merge(
 553                                 array(
 554                                         "{$wgCookiePrefix}Token",
 555                                         "{$wgCookiePrefix}LoggedOut",
 556                                         session_name()
 557                                 ),
 558                                 $wgCacheVaryCookies
 559                         );
 560                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 561                 }
 562                 return $cookies;
 563         }
 564
 565         function uncacheableBecauseRequestVars() {
 566                 global $wgRequest;
 567                 return  $wgRequest->getText('useskin', false) === false
 568                         && $wgRequest->getText('uselang', false) === false;
 569         }
 570
 571         /**
 572          * Check if the request has a cache-varying cookie header
 573          * If it does, it's very important that we don't allow public caching
 574          */
 575         function haveCacheVaryCookies() {
 576                 global $wgRequest, $wgCookiePrefix;
 577                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 578                 if ( $cookieHeader === false ) {
 579                         return false;
 580                 }
 581                 $cvCookies = $this->getCacheVaryCookies();
 582                 foreach ( $cvCookies as $cookieName ) {
 583                         # Check for a simple string match, like the way squid does it
 584                         if ( strpos( $cookieHeader, $cookieName ) ) {
 585                                 wfDebug( __METHOD__.": found $cookieName\n" );
 586                                 return true;
 587                         }
 588                 }
 589                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 590                 return false;
 591         }
 592
 593         /** Get a complete X-Vary-Options header */
 594         public function getXVO() {
 595                 global $wgCookiePrefix;
 596                 $cvCookies = $this->getCacheVaryCookies();
 597                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 598                 $first = true;
 599                 foreach ( $cvCookies as $cookieName ) {
 600                         if ( $first ) {
 601                                 $first = false;
 602                         } else {
 603                                 $xvo .= ';';
 604                         }
 605                         $xvo .= 'string-contains=' . $cookieName;
 606                 }
 607                 return $xvo;
 608         }
 609
 610         public function sendCacheControl() {
 611                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 612
 613                 $response = $wgRequest->response();
 614                 if ($wgUseETag && $this->mETag)
 615                         $response->header("ETag: $this->mETag");
 616
 617                 # don't serve compressed data to clients who can't handle it
 618                 # maintain different caches for logged-in users and non-logged in ones
 619                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 620
 621                 # Add an X-Vary-Options header for Squid with Wikimedia patches
 622                 $response->header( $this->getXVO() );
 623
 624                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 625                         if( $wgUseSquid && session_id() == '' &&
 626                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 627                         {
 628                                 if ( $wgUseESI ) {
 629                                         # We'll purge the proxy cache explicitly, but require end user agents
 630                                         # to revalidate against the proxy on each visit.
 631                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 632                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 633                                         # start with a shorter timeout for initial testing
 634                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 635                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 636                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 637                                 } else {
 638                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 639                                         # to revalidate against the proxy on each visit.
 640                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 641                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 642                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 643                                         # start with a shorter timeout for initial testing
 644                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 645                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 646                                 }
 647                         } else {
 648                                 # We do want clients to cache if they can, but they *must* check for updates
 649                                 # on revisiting the page.
 650                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 651                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 652                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 653                         }
 654                         if($this->mLastModified) $response->header( "Last-modified: {$this->mLastModified}" );
 655                 } else {
 656                         wfDebug( __METHOD__ . ": no caching **\n", false );
 657
 658                         # In general, the absence of a last modified header should be enough to prevent
 659                         # the client from using its cache. We send a few other things just to make sure.
 660                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 661                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 662                         $response->header( 'Pragma: no-cache' );
 663                 }
 664         }
 665
 666         /**
 667          * Finally, all the text has been munged and accumulated into
 668          * the object, let's actually output it:
 669          */
 670         public function output() {
 671                 global $wgUser, $wgOutputEncoding, $wgRequest;
 672                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 673                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 674                 global $wgServer, $wgStyleVersion, $wgEnableMWSuggest;
 675
 676                 if( $this->mDoNothing ){
 677                         return;
 678                 }
 679
 680                 wfProfileIn( __METHOD__ );
 681
 682                 if ( '' != $this->mRedirect ) {
 683                         # Standards require redirect URLs to be absolute
 684                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
 685                         if( $this->mRedirectCode == '301') {
 686                                 if( !$wgDebugRedirects ) {
 687                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 688                                 }
 689                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 690                         }
 691
 692                         $this->sendCacheControl();
 693
 694                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 695                         if( $wgDebugRedirects ) {
 696                                 $url = htmlspecialchars( $this->mRedirect );
 697                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 698                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 699                                 print "</body>\n</html>\n";
 700                         } else {
 701                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 702                         }
 703                         wfProfileOut( __METHOD__ );
 704                         return;
 705                 }
 706                 elseif ( $this->mStatusCode )
 707                 {
 708                         $statusMessage = array(
 709                                 100 => 'Continue',
 710                                 101 => 'Switching Protocols',
 711                                 102 => 'Processing',
 712                                 200 => 'OK',
 713                                 201 => 'Created',
 714                                 202 => 'Accepted',
 715                                 203 => 'Non-Authoritative Information',
 716                                 204 => 'No Content',
 717                                 205 => 'Reset Content',
 718                                 206 => 'Partial Content',
 719                                 207 => 'Multi-Status',
 720                                 300 => 'Multiple Choices',
 721                                 301 => 'Moved Permanently',
 722                                 302 => 'Found',
 723                                 303 => 'See Other',
 724                                 304 => 'Not Modified',
 725                                 305 => 'Use Proxy',
 726                                 307 => 'Temporary Redirect',
 727                                 400 => 'Bad Request',
 728                                 401 => 'Unauthorized',
 729                                 402 => 'Payment Required',
 730                                 403 => 'Forbidden',
 731                                 404 => 'Not Found',
 732                                 405 => 'Method Not Allowed',
 733                                 406 => 'Not Acceptable',
 734                                 407 => 'Proxy Authentication Required',
 735                                 408 => 'Request Timeout',
 736                                 409 => 'Conflict',
 737                                 410 => 'Gone',
 738                                 411 => 'Length Required',
 739                                 412 => 'Precondition Failed',
 740                                 413 => 'Request Entity Too Large',
 741                                 414 => 'Request-URI Too Large',
 742                                 415 => 'Unsupported Media Type',
 743                                 416 => 'Request Range Not Satisfiable',
 744                                 417 => 'Expectation Failed',
 745                                 422 => 'Unprocessable Entity',
 746                                 423 => 'Locked',
 747                                 424 => 'Failed Dependency',
 748                                 500 => 'Internal Server Error',
 749                                 501 => 'Not Implemented',
 750                                 502 => 'Bad Gateway',
 751                                 503 => 'Service Unavailable',
 752                                 504 => 'Gateway Timeout',
 753                                 505 => 'HTTP Version Not Supported',
 754                                 507 => 'Insufficient Storage'
 755                         );
 756
 757                         if ( $statusMessage[$this->mStatusCode] )
 758                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 759                 }
 760
 761                 $sk = $wgUser->getSkin();
 762
 763                 if ( $wgUseAjax ) {
 764                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 765
 766                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 767
 768                         if( $wgAjaxSearch && $wgUser->getBoolOption( 'ajaxsearch' ) ) {
 769                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 770                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 771                         }
 772
 773                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 774                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 775                         }
 776
 777                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
 778                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/mwsuggest.js?$wgStyleVersion\"></script>\n" );
 779                         }
 780                 }
 781
 782
 783                 # Buffer output; final headers may depend on later processing
 784                 ob_start();
 785
 786                 # Disable temporary placeholders, so that the skin produces HTML
 787                 $sk->postParseLinkColour( false );
 788
 789                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 790                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 791
 792                 if ($this->mArticleBodyOnly) {
 793                         $this->out($this->mBodytext);
 794                 } else {
 795                         // Hook that allows last minute changes to the output page, e.g.
 796                         // adding of CSS or Javascript by extensions.
 797                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
 798
 799                         wfProfileIn( 'Output-skin' );
 800                         $sk->outputPage( $this );
 801                         wfProfileOut( 'Output-skin' );
 802                 }
 803
 804                 $this->sendCacheControl();
 805                 ob_end_flush();
 806                 wfProfileOut( __METHOD__ );
 807         }
 808
 809         /**
 810          * @todo document
 811          * @param string $ins
 812          */
 813         public function out( $ins ) {
 814                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 815                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 816                         $outs = $ins;
 817                 } else {
 818                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 819                         if ( false === $outs ) { $outs = $ins; }
 820                 }
 821                 print $outs;
 822         }
 823
 824         /**
 825          * @todo document
 826          */
 827         public static function setEncodings() {
 828                 global $wgInputEncoding, $wgOutputEncoding;
 829                 global $wgUser, $wgContLang;
 830
 831                 $wgInputEncoding = strtolower( $wgInputEncoding );
 832
 833                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 834                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 835                         return;
 836                 }
 837                 $wgOutputEncoding = $wgInputEncoding;
 838         }
 839
 840         /**
 841          * Deprecated, use wfReportTime() instead.
 842          * @return string
 843          * @deprecated
 844          */
 845         public function reportTime() {
 846                 wfDeprecated( __METHOD__ );
 847                 $time = wfReportTime();
 848                 return $time;
 849         }
 850
 851         /**
 852          * Produce a "user is blocked" page.
 853          *
 854          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 855          * @return nothing
 856          */
 857         function blockedPage( $return = true ) {
 858                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 859
 860                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 861                 $this->setRobotpolicy( 'noindex,nofollow' );
 862                 $this->setArticleRelated( false );
 863
 864                 $name = User::whoIs( $wgUser->blockedBy() );
 865                 $reason = $wgUser->blockedFor();
 866                 if( $reason == '' ) {
 867                         $reason = wfMsg( 'blockednoreason' );
 868                 }
 869                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
 870                 $ip = wfGetIP();
 871
 872                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 873
 874                 $blockid = $wgUser->mBlock->mId;
 875
 876                 $blockExpiry = $wgUser->mBlock->mExpiry;
 877                 if ( $blockExpiry == 'infinity' ) {
 878                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 879                         // Search for localization in 'ipboptions'
 880                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 881                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 882                                 if ( strpos( $option, ":" ) === false )
 883                                         continue;
 884                                 list( $show, $value ) = explode( ":", $option );
 885                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 886                                         $blockExpiry = $show;
 887                                         break;
 888                                 }
 889                         }
 890                 } else {
 891                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 892                 }
 893
 894                 if ( $wgUser->mBlock->mAuto ) {
 895                         $msg = 'autoblockedtext';
 896                 } else {
 897                         $msg = 'blockedtext';
 898                 }
 899
 900                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
 901                  * This could be a username, an ip range, or a single ip. */
 902                 $intended = $wgUser->mBlock->mAddress;
 903
 904                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
 905
 906                 # Don't auto-return to special pages
 907                 if( $return ) {
 908                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle : NULL;
 909                         $this->returnToMain( null, $return );
 910                 }
 911         }
 912
 913         /**
 914          * Output a standard error page
 915          *
 916          * @param string $title Message key for page title
 917          * @param string $msg Message key for page text
 918          * @param array $params Message parameters
 919          */
 920         public function showErrorPage( $title, $msg, $params = array() ) {
 921                 global $wgTitle;
 922                 if ( isset($wgTitle) ) {
 923                         $this->mDebugtext .= 'Original title: ' . $wgTitle->getPrefixedText() . "\n";
 924                 }
 925                 $this->setPageTitle( wfMsg( $title ) );
 926                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 927                 $this->setRobotpolicy( 'noindex,nofollow' );
 928                 $this->setArticleRelated( false );
 929                 $this->enableClientCache( false );
 930                 $this->mRedirect = '';
 931                 $this->mBodytext = '';
 932
 933                 array_unshift( $params, 'parse' );
 934                 array_unshift( $params, $msg );
 935                 $this->addHtml( call_user_func_array( 'wfMsgExt', $params ) );
 936
 937                 $this->returnToMain();
 938         }
 939
 940         /**
 941          * Output a standard permission error page
 942          *
 943          * @param array $errors Error message keys
 944          */
 945         public function showPermissionsErrorPage( $errors )
 946         {
 947                 global $wgTitle;
 948
 949                 $this->mDebugtext .= 'Original title: ' .
 950                 $wgTitle->getPrefixedText() . "\n";
 951                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
 952                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
 953                 $this->setRobotpolicy( 'noindex,nofollow' );
 954                 $this->setArticleRelated( false );
 955                 $this->enableClientCache( false );
 956                 $this->mRedirect = '';
 957                 $this->mBodytext = '';
 958                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors ) );
 959         }
 960
 961         /** @deprecated */
 962         public function errorpage( $title, $msg ) {
 963                 wfDeprecated( __METHOD__ );
 964                 throw new ErrorPageError( $title, $msg );
 965         }
 966
 967         /**
 968          * Display an error page indicating that a given version of MediaWiki is
 969          * required to use it
 970          *
 971          * @param mixed $version The version of MediaWiki needed to use the page
 972          */
 973         public function versionRequired( $version ) {
 974                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 975                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 976                 $this->setRobotpolicy( 'noindex,nofollow' );
 977                 $this->setArticleRelated( false );
 978                 $this->mBodytext = '';
 979
 980                 $this->addWikiMsg( 'versionrequiredtext', $version );
 981                 $this->returnToMain();
 982         }
 983
 984         /**
 985          * Display an error page noting that a given permission bit is required.
 986          *
 987          * @param string $permission key required
 988          */
 989         public function permissionRequired( $permission ) {
 990                 global $wgGroupPermissions, $wgUser;
 991
 992                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 993                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 994                 $this->setRobotpolicy( 'noindex,nofollow' );
 995                 $this->setArticleRelated( false );
 996                 $this->mBodytext = '';
 997
 998                 $groups = array();
 999                 foreach( $wgGroupPermissions as $key => $value ) {
1000                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
1001                                 $groupName = User::getGroupName( $key );
1002                                 $groupPage = User::getGroupPage( $key );
1003                                 if( $groupPage ) {
1004                                         $skin = $wgUser->getSkin();
1005                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
1006                                 } else {
1007                                         $groups[] = $groupName;
1008                                 }
1009                         }
1010                 }
1011                 $n = count( $groups );
1012                 $groups = implode( ', ', $groups );
1013                 switch( $n ) {
1014                         case 0:
1015                         case 1:
1016                         case 2:
1017                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
1018                                 break;
1019                         default:
1020                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
1021                 }
1022                 $this->addHtml( $message );
1023                 $this->returnToMain();
1024         }
1025
1026         /**
1027          * Use permissionRequired.
1028          * @deprecated
1029          */
1030         public function sysopRequired() {
1031                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1032         }
1033
1034         /**
1035          * Use permissionRequired.
1036          * @deprecated
1037          */
1038         public function developerRequired() {
1039                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1040         }
1041
1042         /**
1043          * Produce the stock "please login to use the wiki" page
1044          */
1045         public function loginToUse() {
1046                 global $wgUser, $wgTitle, $wgContLang;
1047
1048                 if( $wgUser->isLoggedIn() ) {
1049                         $this->permissionRequired( 'read' );
1050                         return;
1051                 }
1052
1053                 $skin = $wgUser->getSkin();
1054
1055                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1056                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1057                 $this->setRobotPolicy( 'noindex,nofollow' );
1058                 $this->setArticleFlag( false );
1059
1060                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1061                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1062                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1063                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
1064
1065                 # Don't return to the main page if the user can't read it
1066                 # otherwise we'll end up in a pointless loop
1067                 $mainPage = Title::newMainPage();
1068                 if( $mainPage->userCanRead() )
1069                         $this->returnToMain( null, $mainPage );
1070         }
1071
1072         /** @deprecated */
1073         public function databaseError( $fname, $sql, $error, $errno ) {
1074                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1075         }
1076
1077         /**
1078          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1079          * @return string The wikitext error-messages, formatted into a list.
1080          */
1081         public function formatPermissionsErrorMessage( $errors ) {
1082                 $text = wfMsgNoTrans( 'permissionserrorstext', count( $errors ) ) . "\n\n";
1083
1084                 if (count( $errors ) > 1) {
1085                         $text .= '<ul class="permissions-errors">' . "\n";
1086
1087                         foreach( $errors as $error )
1088                         {
1089                                 $text .= '<li>';
1090                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1091                                 $text .= "</li>\n";
1092                         }
1093                         $text .= '</ul>';
1094                 } else {
1095                         $text .= '<div class="permissions-errors">' . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . '</div>';
1096                 }
1097
1098                 return $text;
1099         }
1100
1101         /**
1102          * Display a page stating that the Wiki is in read-only mode,
1103          * and optionally show the source of the page that the user
1104          * was trying to edit.  Should only be called (for this
1105          * purpose) after wfReadOnly() has returned true.
1106          *
1107          * For historical reasons, this function is _also_ used to
1108          * show the error message when a user tries to edit a page
1109          * they are not allowed to edit.  (Unless it's because they're
1110          * blocked, then we show blockedPage() instead.)  In this
1111          * case, the second parameter should be set to true and a list
1112          * of reasons supplied as the third parameter.
1113          *
1114          * @todo Needs to be split into multiple functions.
1115          *
1116          * @param string $source    Source code to show (or null).
1117          * @param bool   $protected Is this a permissions error?
1118          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1119          */
1120         public function readOnlyPage( $source = null, $protected = false, $reasons = array() ) {
1121                 global $wgUser, $wgTitle;
1122                 $skin = $wgUser->getSkin();
1123
1124                 $this->setRobotpolicy( 'noindex,nofollow' );
1125                 $this->setArticleRelated( false );
1126
1127                 // If no reason is given, just supply a default "I can't let you do
1128                 // that, Dave" message.  Should only occur if called by legacy code.
1129                 if ( $protected && empty($reasons) ) {
1130                         $reasons[] = array( 'badaccess-group0' );
1131                 }
1132
1133                 if ( !empty($reasons) ) {
1134                         // Permissions error
1135                         if( $source ) {
1136                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1137                                 $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
1138                         } else {
1139                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1140                         }
1141                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons ) );
1142                 } else {
1143                         // Wiki is read only
1144                         $this->setPageTitle( wfMsg( 'readonly' ) );
1145                         $reason = wfReadOnlyReason();
1146                         $this->addWikiMsg( 'readonlytext', $reason );
1147                 }
1148
1149                 // Show source, if supplied
1150                 if( is_string( $source ) ) {
1151                         $this->addWikiMsg( 'viewsourcetext' );
1152                         $text = Xml::openElement( 'textarea',
1153                                                 array( 'id'   => 'wpTextbox1',
1154                                                        'name' => 'wpTextbox1',
1155                                                        'cols' => $wgUser->getOption( 'cols' ),
1156                                                        'rows' => $wgUser->getOption( 'rows' ),
1157                                                        'readonly' => 'readonly' ) );
1158                         $text .= htmlspecialchars( $source );
1159                         $text .= Xml::closeElement( 'textarea' );
1160                         $this->addHTML( $text );
1161
1162                         // Show templates used by this article
1163                         $skin = $wgUser->getSkin();
1164                         $article = new Article( $wgTitle );
1165                         $this->addHTML( $skin->formatTemplates( $article->getUsedTemplates() ) );
1166                 }
1167
1168                 # If the title doesn't exist, it's fairly pointless to print a return
1169                 # link to it.  After all, you just tried editing it and couldn't, so
1170                 # what's there to do there?
1171                 if( $wgTitle->exists() ) {
1172                         $this->returnToMain( null, $wgTitle );
1173                 }
1174         }
1175
1176         /** @deprecated */
1177         public function fatalError( $message ) {
1178                 wfDeprecated( __METHOD__ );
1179                 throw new FatalError( $message );
1180         }
1181
1182         /** @deprecated */
1183         public function unexpectedValueError( $name, $val ) {
1184                 wfDeprecated( __METHOD__ );
1185                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1186         }
1187
1188         /** @deprecated */
1189         public function fileCopyError( $old, $new ) {
1190                 wfDeprecated( __METHOD__ );
1191                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1192         }
1193
1194         /** @deprecated */
1195         public function fileRenameError( $old, $new ) {
1196                 wfDeprecated( __METHOD__ );
1197                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1198         }
1199
1200         /** @deprecated */
1201         public function fileDeleteError( $name ) {
1202                 wfDeprecated( __METHOD__ );
1203                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1204         }
1205
1206         /** @deprecated */
1207         public function fileNotFoundError( $name ) {
1208                 wfDeprecated( __METHOD__ );
1209                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1210         }
1211
1212         public function showFatalError( $message ) {
1213                 $this->setPageTitle( wfMsg( "internalerror" ) );
1214                 $this->setRobotpolicy( "noindex,nofollow" );
1215                 $this->setArticleRelated( false );
1216                 $this->enableClientCache( false );
1217                 $this->mRedirect = '';
1218                 $this->mBodytext = $message;
1219         }
1220
1221         public function showUnexpectedValueError( $name, $val ) {
1222                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1223         }
1224
1225         public function showFileCopyError( $old, $new ) {
1226                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1227         }
1228
1229         public function showFileRenameError( $old, $new ) {
1230                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1231         }
1232
1233         public function showFileDeleteError( $name ) {
1234                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1235         }
1236
1237         public function showFileNotFoundError( $name ) {
1238                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1239         }
1240
1241         /**
1242          * Add a "return to" link pointing to a specified title
1243          *
1244          * @param Title $title Title to link
1245          */
1246         public function addReturnTo( $title ) {
1247                 global $wgUser;
1248                 $link = wfMsg( 'returnto', $wgUser->getSkin()->makeLinkObj( $title ) );
1249                 $this->addHtml( "<p>{$link}</p>\n" );
1250         }
1251
1252         /**
1253          * Add a "return to" link pointing to a specified title,
1254          * or the title indicated in the request, or else the main page
1255          *
1256          * @param null $unused No longer used
1257          * @param Title $returnto Title to return to
1258          */
1259         public function returnToMain( $unused = null, $returnto = NULL ) {
1260                 global $wgRequest;
1261
1262                 if ( $returnto == NULL ) {
1263                         $returnto = $wgRequest->getText( 'returnto' );
1264                 }
1265
1266                 if ( '' === $returnto ) {
1267                         $returnto = Title::newMainPage();
1268                 }
1269
1270                 if ( is_object( $returnto ) ) {
1271                         $titleObj = $returnto;
1272                 } else {
1273                         $titleObj = Title::newFromText( $returnto );
1274                 }
1275                 if ( !is_object( $titleObj ) ) {
1276                         $titleObj = Title::newMainPage();
1277                 }
1278
1279                 $this->addReturnTo( $titleObj );
1280         }
1281
1282         /**
1283          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1284          * and uses the first 10 of them for META keywords
1285          *
1286          * @param ParserOutput &$parserOutput
1287          */
1288         private function addKeywords( &$parserOutput ) {
1289                 global $wgTitle;
1290                 $this->addKeyword( $wgTitle->getPrefixedText() );
1291                 $count = 1;
1292                 $links2d =& $parserOutput->getLinks();
1293                 if ( !is_array( $links2d ) ) {
1294                         return;
1295                 }
1296                 foreach ( $links2d as $dbkeys ) {
1297                         foreach( $dbkeys as $dbkey => $unused ) {
1298                                 $this->addKeyword( $dbkey );
1299                                 if ( ++$count > 10 ) {
1300                                         break 2;
1301                                 }
1302                         }
1303                 }
1304         }
1305
1306         /**
1307          * @return string The doctype, opening <html>, and head element.
1308          */
1309         public function headElement() {
1310                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1311                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1312                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1313
1314                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1315                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1316                 } else {
1317                         $ret = '';
1318                 }
1319
1320                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1321
1322                 if ( '' == $this->getHTMLTitle() ) {
1323                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1324                 }
1325
1326                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1327                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1328                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1329                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1330                 }
1331                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1332                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1333                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1334
1335                 $ret .= $this->getHeadLinks();
1336                 global $wgStylePath;
1337                 if( $this->isPrintable() ) {
1338                         $media = '';
1339                 } else {
1340                         $media = "media='print'";
1341                 }
1342                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1343                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1344
1345                 $sk = $wgUser->getSkin();
1346                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1347                 $ret .= $this->mScripts;
1348                 $ret .= $sk->getUserStyles();
1349                 $ret .= $this->getHeadItems();
1350
1351                 if ($wgUseTrackbacks && $this->isArticleRelated())
1352                         $ret .= $wgTitle->trackbackRDF();
1353
1354                 $ret .= "</head>\n";
1355                 return $ret;
1356         }
1357
1358         /**
1359          * @return string HTML tag links to be put in the header.
1360          */
1361         public function getHeadLinks() {
1362                 global $wgRequest, $wgFeed;
1363                 $ret = '';
1364                 foreach ( $this->mMetatags as $tag ) {
1365                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1366                                 $a = 'http-equiv';
1367                                 $tag[0] = substr( $tag[0], 5 );
1368                         } else {
1369                                 $a = 'name';
1370                         }
1371                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1372                 }
1373
1374                 $p = $this->mRobotpolicy;
1375                 if( $p !== '' && $p != 'index,follow' ) {
1376                         // http://www.robotstxt.org/wc/meta-user.html
1377                         // Only show if it's different from the default robots policy
1378                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1379                 }
1380
1381                 if ( count( $this->mKeywords ) > 0 ) {
1382                         $strip = array(
1383                                 "/<.*?>/" => '',
1384                                 "/_/" => ' '
1385                         );
1386                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1387                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1388                 }
1389                 foreach ( $this->mLinktags as $tag ) {
1390                         $ret .= "\t\t<link";
1391                         foreach( $tag as $attr => $val ) {
1392                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1393                         }
1394                         $ret .= " />\n";
1395                 }
1396
1397                 if( $wgFeed ) {
1398                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1399                                 # Use the page name for the title (accessed through $wgTitle since
1400                                 # there's no other way).  In principle, this could lead to issues
1401                                 # with having the same name for different feeds corresponding to
1402                                 # the same page, but we can't avoid that at this low a level.
1403                                 global $wgTitle;
1404
1405                                 $ret .= $this->feedLink(
1406                                         $format,
1407                                         $link,
1408                                         wfMsg( "page-{$format}-feed", $wgTitle->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1409                         }
1410
1411                         # Recent changes feed should appear on every page
1412                         # Put it after the per-page feed to avoid changing existing behavior.
1413                         # It's still available, probably via a menu in your browser.
1414                         global $wgSitename;
1415                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1416                         $ret .= $this->feedLink(
1417                                 'rss',
1418                                 $rctitle->getFullURL( 'feed=rss' ),
1419                                 wfMsg( 'site-rss-feed', $wgSitename ) );
1420                         $ret .= $this->feedLink(
1421                                 'atom',
1422                                 $rctitle->getFullURL( 'feed=atom' ),
1423                                 wfMsg( 'site-atom-feed', $wgSitename ) );
1424                 }
1425
1426                 return $ret;
1427         }
1428
1429         /**
1430          * Return URLs for each supported syndication format for this page.
1431          * @return array associating format keys with URLs
1432          */
1433         public function getSyndicationLinks() {
1434                 global $wgTitle, $wgFeedClasses;
1435                 $links = array();
1436
1437                 if( $this->isSyndicated() ) {
1438                         if( is_string( $this->getFeedAppendQuery() ) ) {
1439                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1440                         } else {
1441                                 $appendQuery = "";
1442                         }
1443
1444                         foreach( $wgFeedClasses as $format => $class ) {
1445                                 $links[$format] = $wgTitle->getLocalUrl( "feed=$format{$appendQuery}" );
1446                         }
1447                 }
1448                 return $links;
1449         }
1450
1451         /**
1452          * Generate a <link rel/> for an RSS feed.
1453          */
1454         private function feedLink( $type, $url, $text ) {
1455                 return Xml::element( 'link', array(
1456                         'rel' => 'alternate',
1457                         'type' => "application/$type+xml",
1458                         'title' => $text,
1459                         'href' => $url ) ) . "\n";
1460         }
1461
1462         /**
1463          * Turn off regular page output and return an error reponse
1464          * for when rate limiting has triggered.
1465          */
1466         public function rateLimited() {
1467                 global $wgTitle;
1468
1469                 $this->setPageTitle(wfMsg('actionthrottled'));
1470                 $this->setRobotPolicy( 'noindex,follow' );
1471                 $this->setArticleRelated( false );
1472                 $this->enableClientCache( false );
1473                 $this->mRedirect = '';
1474                 $this->clearHTML();
1475                 $this->setStatusCode(503);
1476                 $this->addWikiMsg( 'actionthrottledtext' );
1477
1478                 $this->returnToMain( null, $wgTitle );
1479         }
1480
1481         /**
1482          * Show an "add new section" link?
1483          *
1484          * @return bool
1485          */
1486         public function showNewSectionLink() {
1487                 return $this->mNewSectionLink;
1488         }
1489
1490         /**
1491          * Show a warning about slave lag
1492          *
1493          * If the lag is higher than $wgSlaveLagCritical seconds,
1494          * then the warning is a bit more obvious. If the lag is
1495          * lower than $wgSlaveLagWarning, then no warning is shown.
1496          *
1497          * @param int $lag Slave lag
1498          */
1499         public function showLagWarning( $lag ) {
1500                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1501                 if( $lag >= $wgSlaveLagWarning ) {
1502                         $message = $lag < $wgSlaveLagCritical
1503                                 ? 'lag-warn-normal'
1504                                 : 'lag-warn-high';
1505                         $warning = wfMsgExt( $message, 'parse', $lag );
1506                         $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1507                 }
1508         }
1509
1510         /**
1511          * Add a wikitext-formatted message to the output.
1512          * This is equivalent to:
1513          *
1514          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
1515          */
1516         public function addWikiMsg( /*...*/ ) {
1517                 $args = func_get_args();
1518                 $name = array_shift( $args );
1519                 $this->addWikiMsgArray( $name, $args );
1520         }
1521
1522         /**
1523          * Add a wikitext-formatted message to the output.
1524          * Like addWikiMsg() except the parameters are taken as an array
1525          * instead of a variable argument list.
1526          *
1527          * $options is passed through to wfMsgExt(), see that function for details.
1528          */
1529         public function addWikiMsgArray( $name, $args, $options = array() ) {
1530                 $options[] = 'parse';
1531                 $text = wfMsgExt( $name, $options, $args );
1532                 $this->addHTML( $text );
1533         }
1534
1535         /**
1536          * This function takes a number of message/argument specifications, wraps them in
1537          * some overall structure, and then parses the result and adds it to the output.
1538          *
1539          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
1540          * on. The subsequent arguments may either be strings, in which case they are the
1541          * message names, or an arrays, in which case the first element is the message name,
1542          * and subsequent elements are the parameters to that message.
1543          *
1544          * The special named parameter 'options' in a message specification array is passed
1545          * through to the $options parameter of wfMsgExt().
1546          *
1547          * Don't use this for messages that are not in users interface language.
1548          *
1549          * For example:
1550          *
1551          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
1552          *
1553          * Is equivalent to:
1554          *
1555          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
1556          */
1557         public function wrapWikiMsg( $wrap /*, ...*/ ) {
1558                 $msgSpecs = func_get_args();
1559                 array_shift( $msgSpecs );
1560                 $msgSpecs = array_values( $msgSpecs );
1561                 $s = $wrap;
1562                 foreach ( $msgSpecs as $n => $spec ) {
1563                         $options = array();
1564                         if ( is_array( $spec ) ) {
1565                                 $args = $spec;
1566                                 $name = array_shift( $args );
1567                                 if ( isset( $args['options'] ) ) {
1568                                         $options = $args['options'];
1569                                         unset( $args['options'] );
1570                                 }
1571                         }  else {
1572                                 $args = array();
1573                                 $name = $spec;
1574                         }
1575                         $s = str_replace( '$' . ($n+1), wfMsgExt( $name, $options, $args ), $s );
1576                 }
1577                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
1578         }
1579 }