includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mLanguageLinks = array();
  16         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  17         var $mTemplateIds = array();
  18
  19         var $mAllowUserJs;
  20         var $mSuppressQuickbar = false;
  21         var $mOnloadHandler = '';
  22         var $mDoNothing = false;
  23         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  24         var $mIsArticleRelated = true;
  25         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  26         var $mShowFeedLinks = false;
  27         var $mFeedLinksAppendQuery = false;
  28         var $mEnableClientCache = true;
  29         var $mArticleBodyOnly = false;
  30
  31         var $mNewSectionLink = false;
  32         var $mNoGallery = false;
  33         var $mPageTitleActionText = '';
  34         var $mParseWarnings = array();
  35         var $mSquidMaxage = 0;
  36         var $mRevisionId = null;
  37
  38         private $mIndexPolicy = 'index';
  39         private $mFollowPolicy = 'follow';
  40
  41         /**
  42          * Constructor
  43          * Initialise private variables
  44          */
  45         function __construct() {
  46                 global $wgAllowUserJs;
  47                 $this->mAllowUserJs = $wgAllowUserJs;
  48         }
  49
  50         public function redirect( $url, $responsecode = '302' ) {
  51                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  52                 $this->mRedirect = str_replace( "\n", '', $url );
  53                 $this->mRedirectCode = $responsecode;
  54         }
  55
  56         public function getRedirect() {
  57                 return $this->mRedirect;
  58         }
  59
  60         /**
  61          * Set the HTTP status code to send with the output.
  62          *
  63          * @param int $statusCode
  64          * @return nothing
  65          */
  66         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  67
  68         # To add an http-equiv meta tag, precede the name with "http:"
  69         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  70         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  71         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  72         function addStyle( $style ) {
  73                 global $wgStylePath, $wgStyleVersion;
  74                 $this->addLink(
  75                                 array(
  76                                         'rel' => 'stylesheet',
  77                                         'href' => $wgStylePath . '/' . $style . '?' . $wgStyleVersion,
  78                                         'type' => 'text/css' ) );
  79         }
  80
  81         function addExtensionStyle( $url ) {
  82                 $linkarr = array( 'rel' => 'stylesheet', 'href' => $url, 'type' => 'text/css' );
  83                 array_push( $this->mExtStyles, $linkarr );
  84         }
  85
  86         /**
  87          * Add a JavaScript file out of skins/common, or a given relative path.
  88          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
  89          */
  90         function addScriptFile( $file ) {
  91                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
  92                 if( substr( $file, 0, 1 ) == '/' ) {
  93                         $path = $file;
  94                 } else {
  95                         $path =  "{$wgStylePath}/common/{$file}";
  96                 }
  97                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"$path?$wgStyleVersion\"></script>\n" );
  98         }
  99
 100         /**
 101          * Add a self-contained script tag with the given contents
 102          * @param string $script JavaScript text, no <script> tags
 103          */
 104         function addInlineScript( $script ) {
 105                 global $wgJsMimeType;
 106                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
 107         }
 108
 109         function getScript() {
 110                 return $this->mScripts . $this->getHeadItems();
 111         }
 112
 113         function getHeadItems() {
 114                 $s = '';
 115                 foreach ( $this->mHeadItems as $item ) {
 116                         $s .= $item;
 117                 }
 118                 return $s;
 119         }
 120
 121         function addHeadItem( $name, $value ) {
 122                 $this->mHeadItems[$name] = $value;
 123         }
 124
 125         function hasHeadItem( $name ) {
 126                 return isset( $this->mHeadItems[$name] );
 127         }
 128
 129         function setETag($tag) { $this->mETag = $tag; }
 130         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 131         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 132
 133         function addLink( $linkarr ) {
 134                 # $linkarr should be an associative array of attributes. We'll escape on output.
 135                 array_push( $this->mLinktags, $linkarr );
 136         }
 137
 138         # Get all links added by extensions
 139         function getExtStyle() {
 140                 return $this->mExtStyles;
 141         }
 142
 143         function addMetadataLink( $linkarr ) {
 144                 # note: buggy CC software only reads first "meta" link
 145                 static $haveMeta = false;
 146                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 147                 $this->addLink( $linkarr );
 148                 $haveMeta = true;
 149         }
 150
 151         /**
 152          * checkLastModified tells the client to use the client-cached page if
 153          * possible. If sucessful, the OutputPage is disabled so that
 154          * any future call to OutputPage->output() have no effect.
 155          *
 156          * @return bool True iff cache-ok headers was sent.
 157          */
 158         function checkLastModified ( $timestamp ) {
 159                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 160
 161                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 162                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 163                         return;
 164                 }
 165                 if( !$wgCachePages ) {
 166                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 167                         return;
 168                 }
 169                 if( $wgUser->getOption( 'nocache' ) ) {
 170                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 171                         return;
 172                 }
 173
 174                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 175                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 176
 177                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 178                         # IE sends sizes after the date like this:
 179                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 180                         # this breaks strtotime().
 181                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 182
 183                         wfSuppressWarnings(); // E_STRICT system time bitching
 184                         $modsinceTime = strtotime( $modsince );
 185                         wfRestoreWarnings();
 186
 187                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 188                         wfDebug( __METHOD__ . ": -- client send If-Modified-Since: " . $modsince . "\n", false );
 189                         wfDebug( __METHOD__ . ": --  we might send Last-Modified : $lastmod\n", false );
 190                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 191                                 # Make sure you're in a place you can leave when you call us!
 192                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 193                                 $this->mLastModified = $lastmod;
 194                                 $this->sendCacheControl();
 195                                 wfDebug( __METHOD__ . ": CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 196                                 $this->disable();
 197
 198                                 // Don't output a compressed blob when using ob_gzhandler;
 199                                 // it's technically against HTTP spec and seems to confuse
 200                                 // Firefox when the response gets split over two packets.
 201                                 wfClearOutputBuffers();
 202
 203                                 return true;
 204                         } else {
 205                                 wfDebug( __METHOD__ . ": READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 206                                 $this->mLastModified = $lastmod;
 207                         }
 208                 } else {
 209                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 210                         $this->mLastModified = $lastmod;
 211                 }
 212         }
 213
 214         function setPageTitleActionText( $text ) {
 215                 $this->mPageTitleActionText = $text;
 216         }
 217
 218         function getPageTitleActionText () {
 219                 if ( isset( $this->mPageTitleActionText ) ) {
 220                         return $this->mPageTitleActionText;
 221                 }
 222         }
 223
 224         /**
 225          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 226          *
 227          * @param $policy string The literal string to output as the contents of
 228          *   the meta tag.  Will be parsed according to the spec and output in
 229          *   standardized form.
 230          * @return null
 231          */
 232         public function setRobotPolicy( $policy ) {
 233                 $policy = explode( ',', $policy );
 234                 $policy = array_map( 'trim', $policy );
 235
 236                 # The default policy is follow, so if nothing is said explicitly, we
 237                 # do that.
 238                 if( in_array( 'nofollow', $policy ) ) {
 239                         $this->mFollowPolicy = 'nofollow';
 240                 } else {
 241                         $this->mFollowPolicy = 'follow';
 242                 }
 243
 244                 if( in_array( 'noindex', $policy ) ) {
 245                         $this->mIndexPolicy = 'noindex';
 246                 } else {
 247                         $this->mIndexPolicy = 'index';
 248                 }
 249         }
 250
 251         /**
 252          * Set the index policy for the page, but leave the follow policy un-
 253          * touched.
 254          *
 255          * @param $policy string Either 'index' or 'noindex'.
 256          * @return null
 257          */
 258         public function setIndexPolicy( $policy ) {
 259                 $policy = trim( $policy );
 260                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 261                         $this->mIndexPolicy = $policy;
 262                 }
 263         }
 264
 265         /**
 266          * Set the follow policy for the page, but leave the index policy un-
 267          * touched.
 268          *
 269          * @param $policy string Either 'follow' or 'nofollow'.
 270          * @return null
 271          */
 272         public function setFollowPolicy( $policy ) {
 273                 $policy = trim( $policy );
 274                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 275                         $this->mFollowPolicy = $policy;
 276                 }
 277         }
 278
 279         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 280         public function setPageTitle( $name ) {
 281                 global $action, $wgContLang;
 282                 $name = $wgContLang->convert($name, true);
 283                 $this->mPagetitle = $name;
 284                 if(!empty($action)) {
 285                         $taction =  $this->getPageTitleActionText();
 286                         if( !empty( $taction ) ) {
 287                                 $name .= ' - '.$taction;
 288                         }
 289                 }
 290
 291                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 292         }
 293         public function getHTMLTitle() { return $this->mHTMLtitle; }
 294         public function getPageTitle() { return $this->mPagetitle; }
 295         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 296         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 297         public function getSubtitle() { return $this->mSubtitle; }
 298         public function isArticle() { return $this->mIsarticle; }
 299         public function setPrintable() { $this->mPrintable = true; }
 300         public function isPrintable() { return $this->mPrintable; }
 301         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 302         public function isSyndicated() { return $this->mShowFeedLinks; }
 303         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 304         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 305         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 306         public function getOnloadHandler() { return $this->mOnloadHandler; }
 307         public function disable() { $this->mDoNothing = true; }
 308
 309         public function setArticleRelated( $v ) {
 310                 $this->mIsArticleRelated = $v;
 311                 if ( !$v ) {
 312                         $this->mIsarticle = false;
 313                 }
 314         }
 315         public function setArticleFlag( $v ) {
 316                 $this->mIsarticle = $v;
 317                 if ( $v ) {
 318                         $this->mIsArticleRelated = $v;
 319                 }
 320         }
 321
 322         public function isArticleRelated() { return $this->mIsArticleRelated; }
 323
 324         public function getLanguageLinks() { return $this->mLanguageLinks; }
 325         public function addLanguageLinks($newLinkArray) {
 326                 $this->mLanguageLinks += $newLinkArray;
 327         }
 328         public function setLanguageLinks($newLinkArray) {
 329                 $this->mLanguageLinks = $newLinkArray;
 330         }
 331
 332         public function getCategoryLinks() {
 333                 return $this->mCategoryLinks;
 334         }
 335
 336         /**
 337          * Add an array of categories, with names in the keys
 338          */
 339         public function addCategoryLinks( $categories ) {
 340                 global $wgUser, $wgContLang;
 341
 342                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 343                         return;
 344                 }
 345
 346                 # Add the links to a LinkBatch
 347                 $arr = array( NS_CATEGORY => $categories );
 348                 $lb = new LinkBatch;
 349                 $lb->setArray( $arr );
 350
 351                 # Fetch existence plus the hiddencat property
 352                 $dbr = wfGetDB( DB_SLAVE );
 353                 $pageTable = $dbr->tableName( 'page' );
 354                 $where = $lb->constructSet( 'page', $dbr );
 355                 $propsTable = $dbr->tableName( 'page_props' );
 356                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 357                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 358                 $res = $dbr->query( $sql, __METHOD__ );
 359
 360                 # Add the results to the link cache
 361                 $lb->addResultToCache( LinkCache::singleton(), $res );
 362
 363                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 364                 $categories = array_combine( array_keys( $categories ),
 365                         array_fill( 0, count( $categories ), 'normal' ) );
 366
 367                 # Mark hidden categories
 368                 foreach ( $res as $row ) {
 369                         if ( isset( $row->pp_value ) ) {
 370                                 $categories[$row->page_title] = 'hidden';
 371                         }
 372                 }
 373
 374                 # Add the remaining categories to the skin
 375                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 376                         $sk = $wgUser->getSkin();
 377                         foreach ( $categories as $category => $type ) {
 378                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 379                                 $text = $wgContLang->convertHtml( $title->getText() );
 380                                 $this->mCategoryLinks[$type][] = $sk->makeLinkObj( $title, $text );
 381                         }
 382                 }
 383         }
 384
 385         public function setCategoryLinks($categories) {
 386                 $this->mCategoryLinks = array();
 387                 $this->addCategoryLinks($categories);
 388         }
 389
 390         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 391         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 392
 393         public function disallowUserJs() { $this->mAllowUserJs = false; }
 394         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 395
 396         public function addHTML( $text ) { $this->mBodytext .= $text; }
 397         public function clearHTML() { $this->mBodytext = ''; }
 398         public function getHTML() { return $this->mBodytext; }
 399         public function debug( $text ) { $this->mDebugtext .= $text; }
 400
 401         /* @deprecated */
 402         public function setParserOptions( $options ) {
 403                 wfDeprecated( __METHOD__ );
 404                 return $this->parserOptions( $options );
 405         }
 406
 407         public function parserOptions( $options = null ) {
 408                 if ( !$this->mParserOptions ) {
 409                         $this->mParserOptions = new ParserOptions;
 410                 }
 411                 return wfSetVar( $this->mParserOptions, $options );
 412         }
 413
 414         /**
 415          * Set the revision ID which will be seen by the wiki text parser
 416          * for things such as embedded {{REVISIONID}} variable use.
 417          * @param mixed $revid an integer, or NULL
 418          * @return mixed previous value
 419          */
 420         public function setRevisionId( $revid ) {
 421                 $val = is_null( $revid ) ? null : intval( $revid );
 422                 return wfSetVar( $this->mRevisionId, $val );
 423         }
 424
 425         /**
 426          * Convert wikitext to HTML and add it to the buffer
 427          * Default assumes that the current page title will
 428          * be used.
 429          *
 430          * @param string $text
 431          * @param bool   $linestart
 432          */
 433         public function addWikiText( $text, $linestart = true ) {
 434                 global $wgTitle;
 435                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 436         }
 437
 438         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 439                 $this->addWikiTextTitle($text, $title, $linestart);
 440         }
 441
 442         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 443                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 444         }
 445
 446         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 447                 global $wgParser;
 448
 449                 wfProfileIn( __METHOD__ );
 450
 451                 wfIncrStats( 'pcache_not_possible' );
 452
 453                 $popts = $this->parserOptions();
 454                 $oldTidy = $popts->setTidy( $tidy );
 455
 456                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 457                         $linestart, true, $this->mRevisionId );
 458
 459                 $popts->setTidy( $oldTidy );
 460
 461                 $this->addParserOutput( $parserOutput );
 462
 463                 wfProfileOut( __METHOD__ );
 464         }
 465
 466         /**
 467          * @todo document
 468          * @param ParserOutput object &$parserOutput
 469          */
 470         public function addParserOutputNoText( &$parserOutput ) {
 471                 global $wgTitle, $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 472
 473                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 474                 $this->addCategoryLinks( $parserOutput->getCategories() );
 475                 $this->mNewSectionLink = $parserOutput->getNewSection();
 476
 477                 if( is_null( $wgExemptFromUserRobotsControl ) ) {
 478                         $bannedNamespaces = $wgContentNamespaces;
 479                 } else {
 480                         $bannedNamespaces = $wgExemptFromUserRobotsControl;
 481                 }
 482                 if( !in_array( $wgTitle->getNamespace(), $bannedNamespaces ) ) {
 483                         # FIXME (bug 14900): This overrides $wgArticleRobotPolicies, and it
 484                         # shouldn't
 485                         $this->setIndexPolicy( $parserOutput->getIndexPolicy() );
 486                 }
 487
 488                 $this->addKeywords( $parserOutput );
 489                 $this->mParseWarnings = $parserOutput->getWarnings();
 490                 if ( $parserOutput->getCacheTime() == -1 ) {
 491                         $this->enableClientCache( false );
 492                 }
 493                 $this->mNoGallery = $parserOutput->getNoGallery();
 494                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 495                 // Versioning...
 496                 $this->mTemplateIds = wfArrayMerge( $this->mTemplateIds, (array)$parserOutput->mTemplateIds );
 497
 498                 // Display title
 499                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 500                         $this->setPageTitle( $dt );
 501
 502                 // Hooks registered in the object
 503                 global $wgParserOutputHooks;
 504                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 505                         list( $hookName, $data ) = $hookInfo;
 506                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 507                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 508                         }
 509                 }
 510
 511                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 512         }
 513
 514         /**
 515          * @todo document
 516          * @param ParserOutput &$parserOutput
 517          */
 518         function addParserOutput( &$parserOutput ) {
 519                 $this->addParserOutputNoText( $parserOutput );
 520                 $text = $parserOutput->getText();
 521                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 522                 $this->addHTML( $text );
 523         }
 524
 525         /**
 526          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 527          * Saves the text into the parser cache if possible.
 528          *
 529          * @param string  $text
 530          * @param Article $article
 531          * @param bool    $cache
 532          * @deprecated Use Article::outputWikitext
 533          */
 534         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 535                 global $wgParser, $wgUser;
 536
 537                 wfDeprecated( __METHOD__ );
 538
 539                 $popts = $this->parserOptions();
 540                 $popts->setTidy(true);
 541                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 542                         $popts, true, true, $this->mRevisionId );
 543                 $popts->setTidy(false);
 544                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 545                         $parserCache = ParserCache::singleton();
 546                         $parserCache->save( $parserOutput, $article, $wgUser );
 547                 }
 548
 549                 $this->addParserOutput( $parserOutput );
 550         }
 551
 552         /**
 553          * @deprecated use addWikiTextTidy()
 554          */
 555         public function addSecondaryWikiText( $text, $linestart = true ) {
 556                 global $wgTitle;
 557                 wfDeprecated( __METHOD__ );
 558                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 559         }
 560
 561         /**
 562          * Add wikitext with tidy enabled
 563          */
 564         public function addWikiTextTidy(  $text, $linestart = true ) {
 565                 global $wgTitle;
 566                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 567         }
 568
 569
 570         /**
 571          * Add the output of a QuickTemplate to the output buffer
 572          *
 573          * @param QuickTemplate $template
 574          */
 575         public function addTemplate( &$template ) {
 576                 ob_start();
 577                 $template->execute();
 578                 $this->addHTML( ob_get_contents() );
 579                 ob_end_clean();
 580         }
 581
 582         /**
 583          * Parse wikitext and return the HTML.
 584          *
 585          * @param string $text
 586          * @param bool   $linestart Is this the start of a line?
 587          * @param bool   $interface ??
 588          */
 589         public function parse( $text, $linestart = true, $interface = false ) {
 590                 global $wgParser, $wgTitle;
 591                 $popts = $this->parserOptions();
 592                 if ( $interface) { $popts->setInterfaceMessage(true); }
 593                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 594                         $linestart, true, $this->mRevisionId );
 595                 if ( $interface) { $popts->setInterfaceMessage(false); }
 596                 return $parserOutput->getText();
 597         }
 598
 599         /**
 600          * @param Article $article
 601          * @param User    $user
 602          *
 603          * @return bool True if successful, else false.
 604          */
 605         public function tryParserCache( &$article, $user ) {
 606                 $parserCache = ParserCache::singleton();
 607                 $parserOutput = $parserCache->get( $article, $user );
 608                 if ( $parserOutput !== false ) {
 609                         $this->addParserOutput( $parserOutput );
 610                         return true;
 611                 } else {
 612                         return false;
 613                 }
 614         }
 615
 616         /**
 617          * @param int $maxage Maximum cache time on the Squid, in seconds.
 618          */
 619         public function setSquidMaxage( $maxage ) {
 620                 $this->mSquidMaxage = $maxage;
 621         }
 622
 623         /**
 624          * Use enableClientCache(false) to force it to send nocache headers
 625          * @param $state ??
 626          */
 627         public function enableClientCache( $state ) {
 628                 return wfSetVar( $this->mEnableClientCache, $state );
 629         }
 630
 631         function getCacheVaryCookies() {
 632                 global $wgCookiePrefix, $wgCacheVaryCookies;
 633                 static $cookies;
 634                 if ( $cookies === null ) {
 635                         $cookies = array_merge(
 636                                 array(
 637                                         "{$wgCookiePrefix}Token",
 638                                         "{$wgCookiePrefix}LoggedOut",
 639                                         session_name()
 640                                 ),
 641                                 $wgCacheVaryCookies
 642                         );
 643                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 644                 }
 645                 return $cookies;
 646         }
 647
 648         function uncacheableBecauseRequestVars() {
 649                 global $wgRequest;
 650                 return  $wgRequest->getText('useskin', false) === false
 651                         && $wgRequest->getText('uselang', false) === false;
 652         }
 653
 654         /**
 655          * Check if the request has a cache-varying cookie header
 656          * If it does, it's very important that we don't allow public caching
 657          */
 658         function haveCacheVaryCookies() {
 659                 global $wgRequest, $wgCookiePrefix;
 660                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 661                 if ( $cookieHeader === false ) {
 662                         return false;
 663                 }
 664                 $cvCookies = $this->getCacheVaryCookies();
 665                 foreach ( $cvCookies as $cookieName ) {
 666                         # Check for a simple string match, like the way squid does it
 667                         if ( strpos( $cookieHeader, $cookieName ) ) {
 668                                 wfDebug( __METHOD__.": found $cookieName\n" );
 669                                 return true;
 670                         }
 671                 }
 672                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 673                 return false;
 674         }
 675
 676         /** Get a complete X-Vary-Options header */
 677         public function getXVO() {
 678                 global $wgCookiePrefix;
 679                 $cvCookies = $this->getCacheVaryCookies();
 680                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 681                 $first = true;
 682                 foreach ( $cvCookies as $cookieName ) {
 683                         if ( $first ) {
 684                                 $first = false;
 685                         } else {
 686                                 $xvo .= ';';
 687                         }
 688                         $xvo .= 'string-contains=' . $cookieName;
 689                 }
 690                 return $xvo;
 691         }
 692
 693         public function sendCacheControl() {
 694                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 695
 696                 $response = $wgRequest->response();
 697                 if ($wgUseETag && $this->mETag)
 698                         $response->header("ETag: $this->mETag");
 699
 700                 # don't serve compressed data to clients who can't handle it
 701                 # maintain different caches for logged-in users and non-logged in ones
 702                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 703
 704                 # Add an X-Vary-Options header for Squid with Wikimedia patches
 705                 $response->header( $this->getXVO() );
 706
 707                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 708                         if( $wgUseSquid && session_id() == '' &&
 709                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 710                         {
 711                                 if ( $wgUseESI ) {
 712                                         # We'll purge the proxy cache explicitly, but require end user agents
 713                                         # to revalidate against the proxy on each visit.
 714                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 715                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 716                                         # start with a shorter timeout for initial testing
 717                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 718                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 719                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 720                                 } else {
 721                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 722                                         # to revalidate against the proxy on each visit.
 723                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 724                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 725                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 726                                         # start with a shorter timeout for initial testing
 727                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 728                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 729                                 }
 730                         } else {
 731                                 # We do want clients to cache if they can, but they *must* check for updates
 732                                 # on revisiting the page.
 733                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 734                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 735                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 736                         }
 737                         if($this->mLastModified) $response->header( "Last-modified: {$this->mLastModified}" );
 738                 } else {
 739                         wfDebug( __METHOD__ . ": no caching **\n", false );
 740
 741                         # In general, the absence of a last modified header should be enough to prevent
 742                         # the client from using its cache. We send a few other things just to make sure.
 743                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 744                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 745                         $response->header( 'Pragma: no-cache' );
 746                 }
 747         }
 748
 749         /**
 750          * Finally, all the text has been munged and accumulated into
 751          * the object, let's actually output it:
 752          */
 753         public function output() {
 754                 global $wgUser, $wgOutputEncoding, $wgRequest;
 755                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 756                 global $wgJsMimeType, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 757                 global $wgEnableMWSuggest;
 758
 759                 if( $this->mDoNothing ){
 760                         return;
 761                 }
 762
 763                 wfProfileIn( __METHOD__ );
 764
 765                 if ( '' != $this->mRedirect ) {
 766                         # Standards require redirect URLs to be absolute
 767                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
 768                         if( $this->mRedirectCode == '301') {
 769                                 if( !$wgDebugRedirects ) {
 770                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 771                                 }
 772                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 773                         }
 774
 775                         $this->sendCacheControl();
 776
 777                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 778                         if( $wgDebugRedirects ) {
 779                                 $url = htmlspecialchars( $this->mRedirect );
 780                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 781                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 782                                 print "</body>\n</html>\n";
 783                         } else {
 784                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 785                         }
 786                         wfProfileOut( __METHOD__ );
 787                         return;
 788                 }
 789                 elseif ( $this->mStatusCode )
 790                 {
 791                         $statusMessage = array(
 792                                 100 => 'Continue',
 793                                 101 => 'Switching Protocols',
 794                                 102 => 'Processing',
 795                                 200 => 'OK',
 796                                 201 => 'Created',
 797                                 202 => 'Accepted',
 798                                 203 => 'Non-Authoritative Information',
 799                                 204 => 'No Content',
 800                                 205 => 'Reset Content',
 801                                 206 => 'Partial Content',
 802                                 207 => 'Multi-Status',
 803                                 300 => 'Multiple Choices',
 804                                 301 => 'Moved Permanently',
 805                                 302 => 'Found',
 806                                 303 => 'See Other',
 807                                 304 => 'Not Modified',
 808                                 305 => 'Use Proxy',
 809                                 307 => 'Temporary Redirect',
 810                                 400 => 'Bad Request',
 811                                 401 => 'Unauthorized',
 812                                 402 => 'Payment Required',
 813                                 403 => 'Forbidden',
 814                                 404 => 'Not Found',
 815                                 405 => 'Method Not Allowed',
 816                                 406 => 'Not Acceptable',
 817                                 407 => 'Proxy Authentication Required',
 818                                 408 => 'Request Timeout',
 819                                 409 => 'Conflict',
 820                                 410 => 'Gone',
 821                                 411 => 'Length Required',
 822                                 412 => 'Precondition Failed',
 823                                 413 => 'Request Entity Too Large',
 824                                 414 => 'Request-URI Too Large',
 825                                 415 => 'Unsupported Media Type',
 826                                 416 => 'Request Range Not Satisfiable',
 827                                 417 => 'Expectation Failed',
 828                                 422 => 'Unprocessable Entity',
 829                                 423 => 'Locked',
 830                                 424 => 'Failed Dependency',
 831                                 500 => 'Internal Server Error',
 832                                 501 => 'Not Implemented',
 833                                 502 => 'Bad Gateway',
 834                                 503 => 'Service Unavailable',
 835                                 504 => 'Gateway Timeout',
 836                                 505 => 'HTTP Version Not Supported',
 837                                 507 => 'Insufficient Storage'
 838                         );
 839
 840                         if ( $statusMessage[$this->mStatusCode] )
 841                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 842                 }
 843
 844                 $sk = $wgUser->getSkin();
 845
 846                 if ( $wgUseAjax ) {
 847                         $this->addScriptFile( 'ajax.js' );
 848
 849                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 850
 851                         if( $wgAjaxSearch && $wgUser->getBoolOption( 'ajaxsearch' ) ) {
 852                                 $this->addScriptFile( 'ajaxsearch.js' );
 853                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 854                         }
 855
 856                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 857                                 $this->addScriptFile( 'ajaxwatch.js' );
 858                         }
 859
 860                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
 861                                 $this->addScriptFile( 'mwsuggest.js' );
 862                         }
 863                 }
 864
 865                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
 866                         $this->addScriptFile( 'rightclickedit.js' );
 867                 }
 868
 869                 # Buffer output; final headers may depend on later processing
 870                 ob_start();
 871
 872                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 873                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 874
 875                 if ($this->mArticleBodyOnly) {
 876                         $this->out($this->mBodytext);
 877                 } else {
 878                         // Hook that allows last minute changes to the output page, e.g.
 879                         // adding of CSS or Javascript by extensions.
 880                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
 881
 882                         wfProfileIn( 'Output-skin' );
 883                         $sk->outputPage( $this );
 884                         wfProfileOut( 'Output-skin' );
 885                 }
 886
 887                 $this->sendCacheControl();
 888                 ob_end_flush();
 889                 wfProfileOut( __METHOD__ );
 890         }
 891
 892         /**
 893          * @todo document
 894          * @param string $ins
 895          */
 896         public function out( $ins ) {
 897                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 898                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 899                         $outs = $ins;
 900                 } else {
 901                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 902                         if ( false === $outs ) { $outs = $ins; }
 903                 }
 904                 print $outs;
 905         }
 906
 907         /**
 908          * @todo document
 909          */
 910         public static function setEncodings() {
 911                 global $wgInputEncoding, $wgOutputEncoding;
 912                 global $wgUser, $wgContLang;
 913
 914                 $wgInputEncoding = strtolower( $wgInputEncoding );
 915
 916                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 917                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 918                         return;
 919                 }
 920                 $wgOutputEncoding = $wgInputEncoding;
 921         }
 922
 923         /**
 924          * Deprecated, use wfReportTime() instead.
 925          * @return string
 926          * @deprecated
 927          */
 928         public function reportTime() {
 929                 wfDeprecated( __METHOD__ );
 930                 $time = wfReportTime();
 931                 return $time;
 932         }
 933
 934         /**
 935          * Produce a "user is blocked" page.
 936          *
 937          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 938          * @return nothing
 939          */
 940         function blockedPage( $return = true ) {
 941                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 942
 943                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 944                 $this->setRobotPolicy( 'noindex,nofollow' );
 945                 $this->setArticleRelated( false );
 946
 947                 $name = User::whoIs( $wgUser->blockedBy() );
 948                 $reason = $wgUser->blockedFor();
 949                 if( $reason == '' ) {
 950                         $reason = wfMsg( 'blockednoreason' );
 951                 }
 952                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
 953                 $ip = wfGetIP();
 954
 955                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 956
 957                 $blockid = $wgUser->mBlock->mId;
 958
 959                 $blockExpiry = $wgUser->mBlock->mExpiry;
 960                 if ( $blockExpiry == 'infinity' ) {
 961                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 962                         // Search for localization in 'ipboptions'
 963                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 964                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 965                                 if ( strpos( $option, ":" ) === false )
 966                                         continue;
 967                                 list( $show, $value ) = explode( ":", $option );
 968                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 969                                         $blockExpiry = $show;
 970                                         break;
 971                                 }
 972                         }
 973                 } else {
 974                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 975                 }
 976
 977                 if ( $wgUser->mBlock->mAuto ) {
 978                         $msg = 'autoblockedtext';
 979                 } else {
 980                         $msg = 'blockedtext';
 981                 }
 982
 983                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
 984                  * This could be a username, an ip range, or a single ip. */
 985                 $intended = $wgUser->mBlock->mAddress;
 986
 987                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
 988
 989                 # Don't auto-return to special pages
 990                 if( $return ) {
 991                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle : NULL;
 992                         $this->returnToMain( null, $return );
 993                 }
 994         }
 995
 996         /**
 997          * Output a standard error page
 998          *
 999          * @param string $title Message key for page title
1000          * @param string $msg Message key for page text
1001          * @param array $params Message parameters
1002          */
1003         public function showErrorPage( $title, $msg, $params = array() ) {
1004                 global $wgTitle;
1005                 if ( isset($wgTitle) ) {
1006                         $this->mDebugtext .= 'Original title: ' . $wgTitle->getPrefixedText() . "\n";
1007                 }
1008                 $this->setPageTitle( wfMsg( $title ) );
1009                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1010                 $this->setRobotPolicy( 'noindex,nofollow' );
1011                 $this->setArticleRelated( false );
1012                 $this->enableClientCache( false );
1013                 $this->mRedirect = '';
1014                 $this->mBodytext = '';
1015
1016                 array_unshift( $params, 'parse' );
1017                 array_unshift( $params, $msg );
1018                 $this->addHtml( call_user_func_array( 'wfMsgExt', $params ) );
1019
1020                 $this->returnToMain();
1021         }
1022
1023         /**
1024          * Output a standard permission error page
1025          *
1026          * @param array $errors Error message keys
1027          */
1028         public function showPermissionsErrorPage( $errors, $action = null )
1029         {
1030                 global $wgTitle;
1031
1032                 $this->mDebugtext .= 'Original title: ' .
1033                 $wgTitle->getPrefixedText() . "\n";
1034                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1035                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1036                 $this->setRobotPolicy( 'noindex,nofollow' );
1037                 $this->setArticleRelated( false );
1038                 $this->enableClientCache( false );
1039                 $this->mRedirect = '';
1040                 $this->mBodytext = '';
1041                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1042         }
1043
1044         /** @deprecated */
1045         public function errorpage( $title, $msg ) {
1046                 wfDeprecated( __METHOD__ );
1047                 throw new ErrorPageError( $title, $msg );
1048         }
1049
1050         /**
1051          * Display an error page indicating that a given version of MediaWiki is
1052          * required to use it
1053          *
1054          * @param mixed $version The version of MediaWiki needed to use the page
1055          */
1056         public function versionRequired( $version ) {
1057                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1058                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1059                 $this->setRobotPolicy( 'noindex,nofollow' );
1060                 $this->setArticleRelated( false );
1061                 $this->mBodytext = '';
1062
1063                 $this->addWikiMsg( 'versionrequiredtext', $version );
1064                 $this->returnToMain();
1065         }
1066
1067         /**
1068          * Display an error page noting that a given permission bit is required.
1069          *
1070          * @param string $permission key required
1071          */
1072         public function permissionRequired( $permission ) {
1073                 global $wgUser;
1074
1075                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1076                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1077                 $this->setRobotPolicy( 'noindex,nofollow' );
1078                 $this->setArticleRelated( false );
1079                 $this->mBodytext = '';
1080
1081                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1082                         User::getGroupsWithPermission( $permission ) );
1083                 if( $groups ) {
1084                         $this->addWikiMsg( 'badaccess-groups',
1085                                 implode( ', ', $groups ),
1086                                 count( $groups) );
1087                 } else {
1088                         $this->addWikiMsg( 'badaccess-group0' );
1089                 }
1090                 $this->returnToMain();
1091         }
1092
1093         /**
1094          * Use permissionRequired.
1095          * @deprecated
1096          */
1097         public function sysopRequired() {
1098                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1099         }
1100
1101         /**
1102          * Use permissionRequired.
1103          * @deprecated
1104          */
1105         public function developerRequired() {
1106                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1107         }
1108
1109         /**
1110          * Produce the stock "please login to use the wiki" page
1111          */
1112         public function loginToUse() {
1113                 global $wgUser, $wgTitle, $wgContLang;
1114
1115                 if( $wgUser->isLoggedIn() ) {
1116                         $this->permissionRequired( 'read' );
1117                         return;
1118                 }
1119
1120                 $skin = $wgUser->getSkin();
1121
1122                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1123                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1124                 $this->setRobotPolicy( 'noindex,nofollow' );
1125                 $this->setArticleFlag( false );
1126
1127                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1128                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1129                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1130                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
1131
1132                 # Don't return to the main page if the user can't read it
1133                 # otherwise we'll end up in a pointless loop
1134                 $mainPage = Title::newMainPage();
1135                 if( $mainPage->userCanRead() )
1136                         $this->returnToMain( null, $mainPage );
1137         }
1138
1139         /** @deprecated */
1140         public function databaseError( $fname, $sql, $error, $errno ) {
1141                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1142         }
1143
1144         /**
1145          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1146          * @return string The wikitext error-messages, formatted into a list.
1147          */
1148         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1149                 if ($action == null) {
1150                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1151                 } else {
1152                         $action_desc = wfMsg( "right-$action" );
1153                         $action_desc[0] = strtolower($action_desc[0]);
1154                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1155                 }
1156
1157                 if (count( $errors ) > 1) {
1158                         $text .= '<ul class="permissions-errors">' . "\n";
1159
1160                         foreach( $errors as $error )
1161                         {
1162                                 $text .= '<li>';
1163                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1164                                 $text .= "</li>\n";
1165                         }
1166                         $text .= '</ul>';
1167                 } else {
1168                         $text .= '<div class="permissions-errors">' . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . '</div>';
1169                 }
1170
1171                 return $text;
1172         }
1173
1174         /**
1175          * Display a page stating that the Wiki is in read-only mode,
1176          * and optionally show the source of the page that the user
1177          * was trying to edit.  Should only be called (for this
1178          * purpose) after wfReadOnly() has returned true.
1179          *
1180          * For historical reasons, this function is _also_ used to
1181          * show the error message when a user tries to edit a page
1182          * they are not allowed to edit.  (Unless it's because they're
1183          * blocked, then we show blockedPage() instead.)  In this
1184          * case, the second parameter should be set to true and a list
1185          * of reasons supplied as the third parameter.
1186          *
1187          * @todo Needs to be split into multiple functions.
1188          *
1189          * @param string $source    Source code to show (or null).
1190          * @param bool   $protected Is this a permissions error?
1191          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1192          */
1193         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1194                 global $wgUser, $wgTitle;
1195                 $skin = $wgUser->getSkin();
1196
1197                 $this->setRobotPolicy( 'noindex,nofollow' );
1198                 $this->setArticleRelated( false );
1199
1200                 // If no reason is given, just supply a default "I can't let you do
1201                 // that, Dave" message.  Should only occur if called by legacy code.
1202                 if ( $protected && empty($reasons) ) {
1203                         $reasons[] = array( 'badaccess-group0' );
1204                 }
1205
1206                 if ( !empty($reasons) ) {
1207                         // Permissions error
1208                         if( $source ) {
1209                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1210                                 $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
1211                         } else {
1212                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1213                         }
1214                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1215                 } else {
1216                         // Wiki is read only
1217                         $this->setPageTitle( wfMsg( 'readonly' ) );
1218                         $reason = wfReadOnlyReason();
1219                         $this->addWikiMsg( 'readonlytext', $reason );
1220                 }
1221
1222                 // Show source, if supplied
1223                 if( is_string( $source ) ) {
1224                         $this->addWikiMsg( 'viewsourcetext' );
1225                         $text = Xml::openElement( 'textarea',
1226                                                 array( 'id'   => 'wpTextbox1',
1227                                                        'name' => 'wpTextbox1',
1228                                                        'cols' => $wgUser->getOption( 'cols' ),
1229                                                        'rows' => $wgUser->getOption( 'rows' ),
1230                                                        'readonly' => 'readonly' ) );
1231                         $text .= htmlspecialchars( $source );
1232                         $text .= Xml::closeElement( 'textarea' );
1233                         $this->addHTML( $text );
1234
1235                         // Show templates used by this article
1236                         $skin = $wgUser->getSkin();
1237                         $article = new Article( $wgTitle );
1238                         $this->addHTML( "<div class='templatesUsed'>
1239 {$skin->formatTemplates( $article->getUsedTemplates() )}
1240 </div>
1241 " );
1242                 }
1243
1244                 # If the title doesn't exist, it's fairly pointless to print a return
1245                 # link to it.  After all, you just tried editing it and couldn't, so
1246                 # what's there to do there?
1247                 if( $wgTitle->exists() ) {
1248                         $this->returnToMain( null, $wgTitle );
1249                 }
1250         }
1251
1252         /** @deprecated */
1253         public function fatalError( $message ) {
1254                 wfDeprecated( __METHOD__ );
1255                 throw new FatalError( $message );
1256         }
1257
1258         /** @deprecated */
1259         public function unexpectedValueError( $name, $val ) {
1260                 wfDeprecated( __METHOD__ );
1261                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1262         }
1263
1264         /** @deprecated */
1265         public function fileCopyError( $old, $new ) {
1266                 wfDeprecated( __METHOD__ );
1267                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1268         }
1269
1270         /** @deprecated */
1271         public function fileRenameError( $old, $new ) {
1272                 wfDeprecated( __METHOD__ );
1273                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1274         }
1275
1276         /** @deprecated */
1277         public function fileDeleteError( $name ) {
1278                 wfDeprecated( __METHOD__ );
1279                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1280         }
1281
1282         /** @deprecated */
1283         public function fileNotFoundError( $name ) {
1284                 wfDeprecated( __METHOD__ );
1285                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1286         }
1287
1288         public function showFatalError( $message ) {
1289                 $this->setPageTitle( wfMsg( "internalerror" ) );
1290                 $this->setRobotPolicy( "noindex,nofollow" );
1291                 $this->setArticleRelated( false );
1292                 $this->enableClientCache( false );
1293                 $this->mRedirect = '';
1294                 $this->mBodytext = $message;
1295         }
1296
1297         public function showUnexpectedValueError( $name, $val ) {
1298                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1299         }
1300
1301         public function showFileCopyError( $old, $new ) {
1302                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1303         }
1304
1305         public function showFileRenameError( $old, $new ) {
1306                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1307         }
1308
1309         public function showFileDeleteError( $name ) {
1310                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1311         }
1312
1313         public function showFileNotFoundError( $name ) {
1314                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1315         }
1316
1317         /**
1318          * Add a "return to" link pointing to a specified title
1319          *
1320          * @param Title $title Title to link
1321          */
1322         public function addReturnTo( $title ) {
1323                 global $wgUser;
1324                 $link = wfMsg( 'returnto', $wgUser->getSkin()->makeLinkObj( $title ) );
1325                 $this->addHtml( "<p>{$link}</p>\n" );
1326         }
1327
1328         /**
1329          * Add a "return to" link pointing to a specified title,
1330          * or the title indicated in the request, or else the main page
1331          *
1332          * @param null $unused No longer used
1333          * @param Title $returnto Title to return to
1334          */
1335         public function returnToMain( $unused = null, $returnto = NULL ) {
1336                 global $wgRequest;
1337
1338                 if ( $returnto == NULL ) {
1339                         $returnto = $wgRequest->getText( 'returnto' );
1340                 }
1341
1342                 if ( '' === $returnto ) {
1343                         $returnto = Title::newMainPage();
1344                 }
1345
1346                 if ( is_object( $returnto ) ) {
1347                         $titleObj = $returnto;
1348                 } else {
1349                         $titleObj = Title::newFromText( $returnto );
1350                 }
1351                 if ( !is_object( $titleObj ) ) {
1352                         $titleObj = Title::newMainPage();
1353                 }
1354
1355                 $this->addReturnTo( $titleObj );
1356         }
1357
1358         /**
1359          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1360          * and uses the first 10 of them for META keywords
1361          *
1362          * @param ParserOutput &$parserOutput
1363          */
1364         private function addKeywords( &$parserOutput ) {
1365                 global $wgTitle;
1366                 $this->addKeyword( $wgTitle->getPrefixedText() );
1367                 $count = 1;
1368                 $links2d =& $parserOutput->getLinks();
1369                 if ( !is_array( $links2d ) ) {
1370                         return;
1371                 }
1372                 foreach ( $links2d as $dbkeys ) {
1373                         foreach( $dbkeys as $dbkey => $unused ) {
1374                                 $this->addKeyword( $dbkey );
1375                                 if ( ++$count > 10 ) {
1376                                         break 2;
1377                                 }
1378                         }
1379                 }
1380         }
1381
1382         /**
1383          * @return string The doctype, opening <html>, and head element.
1384          */
1385         public function headElement() {
1386                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1387                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1388                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1389
1390                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1391                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1392                 } else {
1393                         $ret = '';
1394                 }
1395
1396                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1397
1398                 if ( '' == $this->getHTMLTitle() ) {
1399                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1400                 }
1401
1402                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1403                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1404                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1405                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1406                 }
1407                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1408                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1409                 $this->addMeta( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" );
1410
1411                 $ret .= $this->getHeadLinks();
1412                 global $wgStylePath;
1413                 if( $this->isPrintable() ) {
1414                         $media = '';
1415                 } else {
1416                         $media = "media='print'";
1417                 }
1418                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1419                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1420
1421                 $sk = $wgUser->getSkin();
1422                 // Load order here is key
1423                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1424                 $ret .= $this->mScripts;
1425                 $ret .= $sk->getSiteStyles();
1426                 foreach( $this->mExtStyles as $tag ) {
1427                         $ret .= Xml::element( 'link', $tag ) . "\n";
1428                 }
1429                 $ret .= $sk->getUserStyles();
1430                 $ret .= $this->getHeadItems();
1431
1432                 if ($wgUseTrackbacks && $this->isArticleRelated())
1433                         $ret .= $wgTitle->trackbackRDF();
1434
1435                 $ret .= "</head>\n";
1436                 return $ret;
1437         }
1438
1439         protected function addDefaultMeta() {
1440                 global $wgVersion;
1441                 $this->addMeta( "generator", "MediaWiki $wgVersion" );
1442
1443                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1444                 if( $p !== 'index,follow' ) {
1445                         // http://www.robotstxt.org/wc/meta-user.html
1446                         // Only show if it's different from the default robots policy
1447                         $this->addMeta( 'robots', $p );
1448                 }
1449
1450                 if ( count( $this->mKeywords ) > 0 ) {
1451                         $strip = array(
1452                                 "/<.*?>/" => '',
1453                                 "/_/" => ' '
1454                         );
1455                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1456                 }
1457         }
1458
1459         /**
1460          * @return string HTML tag links to be put in the header.
1461          */
1462         public function getHeadLinks() {
1463                 global $wgRequest, $wgFeed;
1464
1465                 // Ideally this should happen earlier, somewhere. :P
1466                 $this->addDefaultMeta();
1467
1468                 $tags = array();
1469
1470                 foreach ( $this->mMetatags as $tag ) {
1471                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1472                                 $a = 'http-equiv';
1473                                 $tag[0] = substr( $tag[0], 5 );
1474                         } else {
1475                                 $a = 'name';
1476                         }
1477                         $tags[] = Xml::element( 'meta',
1478                                 array(
1479                                         $a => $tag[0],
1480                                         'content' => $tag[1] ) );
1481                 }
1482                 foreach ( $this->mLinktags as $tag ) {
1483                         $tags[] = Xml::element( 'link', $tag );
1484                 }
1485
1486                 if( $wgFeed ) {
1487                         global $wgTitle;
1488                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1489                                 # Use the page name for the title (accessed through $wgTitle since
1490                                 # there's no other way).  In principle, this could lead to issues
1491                                 # with having the same name for different feeds corresponding to
1492                                 # the same page, but we can't avoid that at this low a level.
1493
1494                                 $tags[] = $this->feedLink(
1495                                         $format,
1496                                         $link,
1497                                         wfMsg( "page-{$format}-feed", $wgTitle->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1498                         }
1499
1500                         # Recent changes feed should appear on every page (except recentchanges,
1501                         # that would be redundant). Put it after the per-page feed to avoid
1502                         # changing existing behavior. It's still available, probably via a
1503                         # menu in your browser. Some sites might have a different feed they'd
1504                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1505                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1506                         # If so, use it instead.
1507
1508                         global $wgOverrideSiteFeed, $wgSitename;
1509                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1510
1511                         if ( $wgOverrideSiteFeed ) {
1512                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1513                                         $tags[] = $this->feedLink (
1514                                                 $type,
1515                                                 htmlspecialchars( $feedUrl ),
1516                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1517                                 }
1518                         }
1519                         else if ( $wgTitle->getPrefixedText() != $rctitle->getPrefixedText() ) {
1520                                 $tags[] = $this->feedLink(
1521                                         'rss',
1522                                         $rctitle->getFullURL( 'feed=rss' ),
1523                                         wfMsg( 'site-rss-feed', $wgSitename ) );
1524                                 $tags[] = $this->feedLink(
1525                                         'atom',
1526                                         $rctitle->getFullURL( 'feed=atom' ),
1527                                         wfMsg( 'site-atom-feed', $wgSitename ) );
1528                         }
1529                 }
1530
1531                 return implode( "\n\t\t", $tags ) . "\n";
1532         }
1533
1534         /**
1535          * Return URLs for each supported syndication format for this page.
1536          * @return array associating format keys with URLs
1537          */
1538         public function getSyndicationLinks() {
1539                 global $wgTitle, $wgFeedClasses;
1540                 $links = array();
1541
1542                 if( $this->isSyndicated() ) {
1543                         if( is_string( $this->getFeedAppendQuery() ) ) {
1544                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1545                         } else {
1546                                 $appendQuery = "";
1547                         }
1548
1549                         foreach( $wgFeedClasses as $format => $class ) {
1550                                 $links[$format] = $wgTitle->getLocalUrl( "feed=$format{$appendQuery}" );
1551                         }
1552                 }
1553                 return $links;
1554         }
1555
1556         /**
1557          * Generate a <link rel/> for an RSS feed.
1558          */
1559         private function feedLink( $type, $url, $text ) {
1560                 return Xml::element( 'link', array(
1561                         'rel' => 'alternate',
1562                         'type' => "application/$type+xml",
1563                         'title' => $text,
1564                         'href' => $url ) );
1565         }
1566
1567         /**
1568          * Turn off regular page output and return an error reponse
1569          * for when rate limiting has triggered.
1570          */
1571         public function rateLimited() {
1572                 global $wgTitle;
1573
1574                 $this->setPageTitle(wfMsg('actionthrottled'));
1575                 $this->setRobotPolicy( 'noindex,follow' );
1576                 $this->setArticleRelated( false );
1577                 $this->enableClientCache( false );
1578                 $this->mRedirect = '';
1579                 $this->clearHTML();
1580                 $this->setStatusCode(503);
1581                 $this->addWikiMsg( 'actionthrottledtext' );
1582
1583                 $this->returnToMain( null, $wgTitle );
1584         }
1585
1586         /**
1587          * Show an "add new section" link?
1588          *
1589          * @return bool
1590          */
1591         public function showNewSectionLink() {
1592                 return $this->mNewSectionLink;
1593         }
1594
1595         /**
1596          * Show a warning about slave lag
1597          *
1598          * If the lag is higher than $wgSlaveLagCritical seconds,
1599          * then the warning is a bit more obvious. If the lag is
1600          * lower than $wgSlaveLagWarning, then no warning is shown.
1601          *
1602          * @param int $lag Slave lag
1603          */
1604         public function showLagWarning( $lag ) {
1605                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1606                 if( $lag >= $wgSlaveLagWarning ) {
1607                         $message = $lag < $wgSlaveLagCritical
1608                                 ? 'lag-warn-normal'
1609                                 : 'lag-warn-high';
1610                         $warning = wfMsgExt( $message, 'parse', $lag );
1611                         $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1612                 }
1613         }
1614
1615         /**
1616          * Add a wikitext-formatted message to the output.
1617          * This is equivalent to:
1618          *
1619          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
1620          */
1621         public function addWikiMsg( /*...*/ ) {
1622                 $args = func_get_args();
1623                 $name = array_shift( $args );
1624                 $this->addWikiMsgArray( $name, $args );
1625         }
1626
1627         /**
1628          * Add a wikitext-formatted message to the output.
1629          * Like addWikiMsg() except the parameters are taken as an array
1630          * instead of a variable argument list.
1631          *
1632          * $options is passed through to wfMsgExt(), see that function for details.
1633          */
1634         public function addWikiMsgArray( $name, $args, $options = array() ) {
1635                 $options[] = 'parse';
1636                 $text = wfMsgExt( $name, $options, $args );
1637                 $this->addHTML( $text );
1638         }
1639
1640         /**
1641          * This function takes a number of message/argument specifications, wraps them in
1642          * some overall structure, and then parses the result and adds it to the output.
1643          *
1644          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
1645          * on. The subsequent arguments may either be strings, in which case they are the
1646          * message names, or an arrays, in which case the first element is the message name,
1647          * and subsequent elements are the parameters to that message.
1648          *
1649          * The special named parameter 'options' in a message specification array is passed
1650          * through to the $options parameter of wfMsgExt().
1651          *
1652          * Don't use this for messages that are not in users interface language.
1653          *
1654          * For example:
1655          *
1656          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
1657          *
1658          * Is equivalent to:
1659          *
1660          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
1661          */
1662         public function wrapWikiMsg( $wrap /*, ...*/ ) {
1663                 $msgSpecs = func_get_args();
1664                 array_shift( $msgSpecs );
1665                 $msgSpecs = array_values( $msgSpecs );
1666                 $s = $wrap;
1667                 foreach ( $msgSpecs as $n => $spec ) {
1668                         $options = array();
1669                         if ( is_array( $spec ) ) {
1670                                 $args = $spec;
1671                                 $name = array_shift( $args );
1672                                 if ( isset( $args['options'] ) ) {
1673                                         $options = $args['options'];
1674                                         unset( $args['options'] );
1675                                 }
1676                         }  else {
1677                                 $args = array();
1678                                 $name = $spec;
1679                         }
1680                         $s = str_replace( '$' . ($n+1), wfMsgExt( $name, $options, $args ), $s );
1681                 }
1682                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
1683         }
1684 }