includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class for viewing MediaWiki article and history.
   9  *
  10  * This maintains WikiPage functions for backwards compatibility.
  11  *
  12  * @TODO: move and rewrite code to an Action class
  13  *
  14  * See design.txt for an overview.
  15  * Note: edit user interface and cache support functions have been
  16  * moved to separate EditPage and HTMLFileCache classes.
  17  *
  18  * @internal documentation reviewed 15 Mar 2010
  19  */
  20 class Article extends Page {
  21         /**@{{
  22          * @private
  23          */
  24
  25         /**
  26          * @var IContextSource
  27          */
  28         protected $mContext;
  29
  30         /**
  31          * @var WikiPage
  32          */
  33         protected $mPage;
  34
  35         /**
  36          * @var ParserOptions: ParserOptions object for $wgUser articles
  37          */
  38         public $mParserOptions;
  39
  40         var $mContent;                    // !< #BC cruft
  41         var $mContentObject;              // !<
  42         var $mContentLoaded = false;      // !<
  43         var $mOldId;                      // !<
  44
  45         /**
  46          * @var Title
  47          */
  48         var $mRedirectedFrom = null;
  49
  50         /**
  51          * @var mixed: boolean false or URL string
  52          */
  53         var $mRedirectUrl = false;        // !<
  54         var $mRevIdFetched = 0;           // !<
  55
  56         /**
  57          * @var Revision
  58          */
  59         var $mRevision = null;
  60
  61         /**
  62          * @var ParserOutput
  63          */
  64         var $mParserOutput;
  65
  66         /**@}}*/
  67
  68         /**
  69          * Constructor and clear the article
  70          * @param $title Title Reference to a Title object.
  71          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  72          */
  73         public function __construct( Title $title, $oldId = null ) {
  74                 $this->mOldId = $oldId;
  75                 $this->mPage = $this->newPage( $title );
  76         }
  77
  78         /**
  79          * @param $title Title
  80          * @return WikiPage
  81          */
  82         protected function newPage( Title $title ) {
  83                 return new WikiPage( $title );
  84         }
  85
  86         /**
  87          * Constructor from a page id
  88          * @param $id Int article ID to load
  89          * @return Article|null
  90          */
  91         public static function newFromID( $id ) {
  92                 $t = Title::newFromID( $id );
  93                 # @todo FIXME: Doesn't inherit right
  94                 return $t == null ? null : new self( $t );
  95                 # return $t == null ? null : new static( $t ); // PHP 5.3
  96         }
  97
  98         /**
  99          * Create an Article object of the appropriate class for the given page.
 100          *
 101          * @param $title Title
 102          * @param $context IContextSource
 103          * @return Article object
 104          */
 105         public static function newFromTitle( $title, IContextSource $context ) {
 106                 if ( NS_MEDIA == $title->getNamespace() ) {
 107                         // FIXME: where should this go?
 108                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 109                 }
 110
 111                 $page = null;
 112                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 113                 if ( !$page ) {
 114                         switch( $title->getNamespace() ) {
 115                                 case NS_FILE:
 116                                         $page = new ImagePage( $title ); #FIXME: teach ImagePage to use ContentHandler
 117                                         break;
 118                                 case NS_CATEGORY:
 119                                         $page = new CategoryPage( $title ); #FIXME: teach ImagePage to use ContentHandler
 120                                         break;
 121                                 default:
 122                                         $handler = ContentHandler::getForTitle( $title );
 123                                         $page = $handler->createArticle( $title );
 124                         }
 125                 }
 126                 $page->setContext( $context );
 127
 128                 return $page;
 129         }
 130
 131         /**
 132          * Create an Article object of the appropriate class for the given page.
 133          *
 134          * @param $page WikiPage
 135          * @param $context IContextSource
 136          * @return Article object
 137          */
 138         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 139                 $article = self::newFromTitle( $page->getTitle(), $context );
 140                 $article->mPage = $page; // override to keep process cached vars
 141                 return $article;
 142         }
 143
 144         /**
 145          * Tell the page view functions that this view was redirected
 146          * from another page on the wiki.
 147          * @param $from Title object.
 148          */
 149         public function setRedirectedFrom( Title $from ) {
 150                 $this->mRedirectedFrom = $from;
 151         }
 152
 153         /**
 154          * Get the title object of the article
 155          *
 156          * @return Title object of this page
 157          */
 158         public function getTitle() {
 159                 return $this->mPage->getTitle();
 160         }
 161
 162         /**
 163          * Get the WikiPage object of this instance
 164          *
 165          * @since 1.19
 166          * @return WikiPage
 167          */
 168         public function getPage() {
 169                 return $this->mPage;
 170         }
 171
 172         /**
 173          * Clear the object
 174          */
 175         public function clear() {
 176                 $this->mContentLoaded = false;
 177
 178                 $this->mRedirectedFrom = null; # Title object if set
 179                 $this->mRevIdFetched = 0;
 180                 $this->mRedirectUrl = false;
 181
 182                 $this->mPage->clear();
 183         }
 184
 185         /**
 186          * Note that getContent/loadContent do not follow redirects anymore.
 187          * If you need to fetch redirectable content easily, try
 188          * the shortcut in WikiPage::getRedirectTarget()
 189          *
 190          * This function has side effects! Do not use this function if you
 191          * only want the real revision text if any.
 192          *
 193          * @return Return the text of this revision
 194          * @deprecated in 1.20; use getContentObject() instead
 195          */
 196         public function getContent() {
 197                 wfDeprecated( __METHOD__, '1.20' );
 198                 $content = $this->getContentObject();
 199                 return ContentHandler::getContentText( $content );
 200         }
 201
 202         /**
 203          * Note that getContent/loadContent do not follow redirects anymore.
 204          * If you need to fetch redirectable content easily, try
 205          * the shortcut in WikiPage::getRedirectTarget()
 206          *
 207          * This function has side effects! Do not use this function if you
 208          * only want the real revision text if any.
 209          *
 210          * @return Return the content of this revision
 211          */
 212    public function getContentObject() {
 213                 global $wgUser;
 214
 215                 wfProfileIn( __METHOD__ );
 216
 217                 if ( $this->mPage->getID() === 0 ) {
 218                         # If this is a MediaWiki:x message, then load the messages
 219                         # and return the message value for x.
 220                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 221                                 $text = $this->getTitle()->getDefaultMessageText();
 222                                 if ( $text === false ) {
 223                                         $text = '';
 224                                 }
 225
 226                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 227                         } else {
 228                                 $content = new MessageContent( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', null, 'parsemag' );
 229                         }
 230                         wfProfileOut( __METHOD__ );
 231
 232                         return $content;
 233                 } else {
 234                         $this->fetchContentObject();
 235                         wfProfileOut( __METHOD__ );
 236
 237                         return $this->mContentObject;
 238                 }
 239         }
 240
 241         /**
 242          * @return int The oldid of the article that is to be shown, 0 for the
 243          *             current revision
 244          */
 245         public function getOldID() {
 246                 if ( is_null( $this->mOldId ) ) {
 247                         $this->mOldId = $this->getOldIDFromRequest();
 248                 }
 249
 250                 return $this->mOldId;
 251         }
 252
 253         /**
 254          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 255          *
 256          * @return int The old id for the request
 257          */
 258         public function getOldIDFromRequest() {
 259                 global $wgRequest;
 260
 261                 $this->mRedirectUrl = false;
 262
 263                 $oldid = $wgRequest->getIntOrNull( 'oldid' );
 264
 265                 if ( $oldid === null ) {
 266                         return 0;
 267                 }
 268
 269                 if ( $oldid !== 0 ) {
 270                         # Load the given revision and check whether the page is another one.
 271                         # In that case, update this instance to reflect the change.
 272                         $this->mRevision = Revision::newFromId( $oldid );
 273                         if ( $this->mRevision !== null ) {
 274                                 // Revision title doesn't match the page title given?
 275                                 if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 276                                         $function = array( get_class( $this->mPage ), 'newFromID' );
 277                                         $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 278                                 }
 279                         }
 280                 }
 281
 282                 if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 283                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 284                         if ( $nextid ) {
 285                                 $oldid = $nextid;
 286                                 $this->mRevision = null;
 287                         } else {
 288                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 289                         }
 290                 } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 291                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 292                         if ( $previd ) {
 293                                 $oldid = $previd;
 294                                 $this->mRevision = null;
 295                         }
 296                 }
 297
 298                 return $oldid;
 299         }
 300
 301         /**
 302          * Load the revision (including text) into this object
 303          *
 304          * @deprecated in 1.19; use fetchContent()
 305          */
 306         function loadContent() {
 307                 wfDeprecated( __METHOD__, '1.19' );
 308                 $this->fetchContent();
 309         }
 310
 311         /**
 312          * Get text of an article from database
 313          * Does *NOT* follow redirects.
 314          *
 315          * @return mixed string containing article contents, or false if null
 316          * @deprecated in 1.20, use getContentObject() instead
 317          */
 318         protected function fetchContent() { #BC cruft!
 319                 wfDeprecated( __METHOD__, '1.20' );
 320
 321                 if ( $this->mContentLoaded && $this->mContent ) {
 322                         return $this->mContent;
 323                 }
 324
 325                 wfProfileIn( __METHOD__ );
 326
 327                 $content = $this->fetchContentObject();
 328
 329                 $this->mContent = ContentHandler::getContentText( $content ); #FIXME: get rid of mContent everywhere!
 330                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ); #BC cruft!
 331
 332                 wfProfileOut( __METHOD__ );
 333
 334                 return $this->mContent;
 335         }
 336
 337
 338         /**
 339          * Get text content object
 340          * Does *NOT* follow redirects.
 341          *
 342          * @return Content object containing article contents, or null
 343          */
 344         protected function fetchContentObject() {
 345                 if ( $this->mContentLoaded ) {
 346                         return $this->mContentObject;
 347                 }
 348
 349                 wfProfileIn( __METHOD__ );
 350
 351                 $this->mContentLoaded = true;
 352                 $this->mContent = null;
 353
 354                 $oldid = $this->getOldID();
 355
 356                 # Pre-fill content with error message so that if something
 357                 # fails we'll have something telling us what we intended.
 358                 $t = $this->getTitle()->getPrefixedText();
 359                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 360                 $this->mContentObject = new MessageContent( 'missing-article', array($t, $d), array() ) ;
 361
 362                 if ( $oldid ) {
 363                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 364                         if ( !$this->mRevision ) {
 365                                 $this->mRevision = Revision::newFromId( $oldid );
 366                                 if ( !$this->mRevision ) {
 367                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 368                                         wfProfileOut( __METHOD__ );
 369                                         return false;
 370                                 }
 371                         }
 372                 } else {
 373                         if ( !$this->mPage->getLatest() ) {
 374                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 375                                 wfProfileOut( __METHOD__ );
 376                                 return false;
 377                         }
 378
 379                         $this->mRevision = $this->mPage->getRevision();
 380
 381                         if ( !$this->mRevision ) {
 382                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 383                                 wfProfileOut( __METHOD__ );
 384                                 return false;
 385                         }
 386                 }
 387
 388                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 389                 // We should instead work with the Revision object when we need it...
 390                 $this->mContentObject = $this->mRevision->getContent( Revision::FOR_THIS_USER ); // Loads if user is allowed
 391                 $this->mRevIdFetched = $this->mRevision->getId();
 392
 393                 wfRunHooks( 'ArticleAfterFetchContentObject', array( &$this, &$this->mContentObject ) ); #FIXME: register new hook
 394
 395                 wfProfileOut( __METHOD__ );
 396
 397                 return $this->mContentObject;
 398         }
 399
 400         /**
 401          * No-op
 402          * @deprecated since 1.18
 403          */
 404         public function forUpdate() {
 405                 wfDeprecated( __METHOD__, '1.18' );
 406         }
 407
 408         /**
 409          * Returns true if the currently-referenced revision is the current edit
 410          * to this page (and it exists).
 411          * @return bool
 412          */
 413         public function isCurrent() {
 414                 # If no oldid, this is the current version.
 415                 if ( $this->getOldID() == 0 ) {
 416                         return true;
 417                 }
 418
 419                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 420         }
 421
 422         /**
 423          * Get the fetched Revision object depending on request parameters or null
 424          * on failure.
 425          *
 426          * @since 1.19
 427          * @return Revision|null
 428          */
 429         public function getRevisionFetched() {
 430                 $this->fetchContentObject();
 431
 432                 return $this->mRevision;
 433         }
 434
 435         /**
 436          * Use this to fetch the rev ID used on page views
 437          *
 438          * @return int revision ID of last article revision
 439          */
 440         public function getRevIdFetched() {
 441                 if ( $this->mRevIdFetched ) {
 442                         return $this->mRevIdFetched;
 443                 } else {
 444                         return $this->mPage->getLatest();
 445                 }
 446         }
 447
 448         /**
 449          * This is the default action of the index.php entry point: just view the
 450          * page of the given title.
 451          */
 452         public function view() {
 453                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 454                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 455
 456                 wfProfileIn( __METHOD__ );
 457
 458                 # Get variables from query string
 459                 # As side effect this will load the revision and update the title
 460                 # in a revision ID is passed in the request, so this should remain
 461                 # the first call of this method even if $oldid is used way below.
 462                 $oldid = $this->getOldID();
 463
 464                 # Another whitelist check in case getOldID() is altering the title
 465                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $wgUser );
 466                 if ( count( $permErrors ) ) {
 467                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 468                         wfProfileOut( __METHOD__ );
 469                         throw new PermissionsError( 'read', $permErrors );
 470                 }
 471
 472                 # getOldID() may as well want us to redirect somewhere else
 473                 if ( $this->mRedirectUrl ) {
 474                         $wgOut->redirect( $this->mRedirectUrl );
 475                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 476                         wfProfileOut( __METHOD__ );
 477
 478                         return;
 479                 }
 480
 481                 # If we got diff in the query, we want to see a diff page instead of the article.
 482                 if ( $wgRequest->getCheck( 'diff' ) ) {
 483                         wfDebug( __METHOD__ . ": showing diff page\n" );
 484                         $this->showDiffPage();
 485                         wfProfileOut( __METHOD__ );
 486
 487                         return;
 488                 }
 489
 490                 # Set page title (may be overridden by DISPLAYTITLE)
 491                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 492
 493                 $wgOut->setArticleFlag( true );
 494                 # Allow frames by default
 495                 $wgOut->allowClickjacking();
 496
 497                 $parserCache = ParserCache::singleton();
 498
 499                 $parserOptions = $this->getParserOptions();
 500                 # Render printable version, use printable version cache
 501                 if ( $wgOut->isPrintable() ) {
 502                         $parserOptions->setIsPrintable( true );
 503                         $parserOptions->setEditSection( false );
 504                 } elseif ( !$this->getTitle()->quickUserCan( 'edit' ) ) {
 505                         $parserOptions->setEditSection( false );
 506                 }
 507
 508                 # Try client and file cache
 509                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 510                         if ( $wgUseETag ) {
 511                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 512                         }
 513
 514                         # Is it client cached?
 515                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 516                                 wfDebug( __METHOD__ . ": done 304\n" );
 517                                 wfProfileOut( __METHOD__ );
 518
 519                                 return;
 520                         # Try file cache
 521                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 522                                 wfDebug( __METHOD__ . ": done file cache\n" );
 523                                 # tell wgOut that output is taken care of
 524                                 $wgOut->disable();
 525                                 $this->mPage->doViewUpdates( $wgUser );
 526                                 wfProfileOut( __METHOD__ );
 527
 528                                 return;
 529                         }
 530                 }
 531
 532                 # Should the parser cache be used?
 533                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 534                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 535                 if ( $wgUser->getStubThreshold() ) {
 536                         wfIncrStats( 'pcache_miss_stub' );
 537                 }
 538
 539                 $this->showRedirectedFromHeader();
 540                 $this->showNamespaceHeader();
 541
 542                 # Iterate through the possible ways of constructing the output text.
 543                 # Keep going until $outputDone is set, or we run out of things to do.
 544                 $pass = 0;
 545                 $outputDone = false;
 546                 $this->mParserOutput = false;
 547
 548                 while ( !$outputDone && ++$pass ) {
 549                         switch( $pass ) {
 550                                 case 1:
 551                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 552                                         break;
 553                                 case 2:
 554                                         # Early abort if the page doesn't exist
 555                                         if ( !$this->mPage->exists() ) {
 556                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 557                                                 $this->showMissingArticle();
 558                                                 wfProfileOut( __METHOD__ );
 559                                                 return;
 560                                         }
 561
 562                                         # Try the parser cache
 563                                         if ( $useParserCache ) {
 564                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 565
 566                                                 if ( $this->mParserOutput !== false ) {
 567                                                         if ( $oldid ) {
 568                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 569                                                                 $this->setOldSubtitle( $oldid );
 570                                                         } else {
 571                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 572                                                         }
 573                                                         $wgOut->addParserOutput( $this->mParserOutput );
 574                                                         # Ensure that UI elements requiring revision ID have
 575                                                         # the correct version information.
 576                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 577                                                         # Preload timestamp to avoid a DB hit
 578                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 579                                                         if ( $cachedTimestamp !== null ) {
 580                                                                 $wgOut->setRevisionTimestamp( $cachedTimestamp );
 581                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 582                                                         }
 583                                                         $outputDone = true;
 584                                                 }
 585                                         }
 586                                         break;
 587                                 case 3:
 588                                         # This will set $this->mRevision if needed
 589                                         $this->fetchContentObject();
 590
 591                                         # Are we looking at an old revision
 592                                         if ( $oldid && $this->mRevision ) {
 593                                                 $this->setOldSubtitle( $oldid );
 594
 595                                                 if ( !$this->showDeletedRevisionHeader() ) {
 596                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 597                                                         wfProfileOut( __METHOD__ );
 598                                                         return;
 599                                                 }
 600                                         }
 601
 602                                         # Ensure that UI elements requiring revision ID have
 603                                         # the correct version information.
 604                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 605                                         # Preload timestamp to avoid a DB hit
 606                                         $wgOut->setRevisionTimestamp( $this->getTimestamp() );
 607
 608                                         # Pages containing custom CSS or JavaScript get special treatment
 609                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 610                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 611                                                 $this->showCssOrJsPage();
 612                                                 $outputDone = true;
 613                                         } elseif( !wfRunHooks( 'ArticleContentViewCustom', array( $this->fetchContentObject(), $this->getTitle(), $wgOut ) ) ) { #FIXME: document new hook!
 614                                                 # Allow extensions do their own custom view for certain pages
 615                                                 $outputDone = true;
 616                                         } elseif( Hooks::isRegistered( 'ArticleViewCustom' ) && !wfRunHooks( 'ArticleViewCustom', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated! #FIXME: deprecate hook!
 617                                                 # Allow extensions do their own custom view for certain pages
 618                                                 $outputDone = true;
 619                                         } else {
 620                                                 $content = $this->getContentObject();
 621                                                 $rt = $content->getRedirectChain();
 622                                                 if ( $rt ) {
 623                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 624                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 625                                                         $wgOut->addHTML( $this->viewRedirect( $rt ) );
 626                                                         # Parse just to get categories, displaytitle, etc.
 627                                                         $this->mParserOutput = $content->getParserOutput( $this->getTitle(), $oldid, $parserOptions );
 628                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 629                                                         $outputDone = true;
 630                                                 }
 631                                         }
 632                                         break;
 633                                 case 4:
 634                                         # Run the parse, protected by a pool counter
 635                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 636
 637                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 638                                                 $this->getRevIdFetched(), $useParserCache, $this->getContentObject() );
 639
 640                                         if ( !$poolArticleView->execute() ) {
 641                                                 $error = $poolArticleView->getError();
 642                                                 if ( $error ) {
 643                                                         $wgOut->clearHTML(); // for release() errors
 644                                                         $wgOut->enableClientCache( false );
 645                                                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 646
 647                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 648                                                         $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 649                                                 }
 650                                                 # Connection or timeout error
 651                                                 wfProfileOut( __METHOD__ );
 652                                                 return;
 653                                         }
 654
 655                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 656                                         $wgOut->addParserOutput( $this->mParserOutput );
 657
 658                                         # Don't cache a dirty ParserOutput object
 659                                         if ( $poolArticleView->getIsDirty() ) {
 660                                                 $wgOut->setSquidMaxage( 0 );
 661                                                 $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 662                                         }
 663
 664                                         $outputDone = true;
 665                                         break;
 666                                 # Should be unreachable, but just in case...
 667                                 default:
 668                                         break 2;
 669                         }
 670                 }
 671
 672                 # Get the ParserOutput actually *displayed* here.
 673                 # Note that $this->mParserOutput is the *current* version output.
 674                 $pOutput = ( $outputDone instanceof ParserOutput )
 675                         ? $outputDone // object fetched by hook
 676                         : $this->mParserOutput;
 677
 678                 # Adjust title for main page & pages with displaytitle
 679                 if ( $pOutput ) {
 680                         $this->adjustDisplayTitle( $pOutput );
 681                 }
 682
 683                 # For the main page, overwrite the <title> element with the con-
 684                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 685                 # that's not empty).
 686                 # This message always exists because it is in the i18n files
 687                 if ( $this->getTitle()->isMainPage() ) {
 688                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 689                         if ( !$msg->isDisabled() ) {
 690                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 691                         }
 692                 }
 693
 694                 # Check for any __NOINDEX__ tags on the page using $pOutput
 695                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 696                 $wgOut->setIndexPolicy( $policy['index'] );
 697                 $wgOut->setFollowPolicy( $policy['follow'] );
 698
 699                 $this->showViewFooter();
 700                 $this->mPage->doViewUpdates( $wgUser );
 701
 702                 wfProfileOut( __METHOD__ );
 703         }
 704
 705         /**
 706          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 707          * @param $pOutput ParserOutput
 708          */
 709         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 710                 global $wgOut;
 711                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 712                 $titleText = $pOutput->getTitleText();
 713                 if ( strval( $titleText ) !== '' ) {
 714                         $wgOut->setPageTitle( $titleText );
 715                 }
 716         }
 717
 718         /**
 719          * Show a diff page according to current request variables. For use within
 720          * Article::view() only, other callers should use the DifferenceEngine class.
 721          */
 722         public function showDiffPage() {
 723                 global $wgRequest, $wgUser;
 724
 725                 $diff = $wgRequest->getVal( 'diff' );
 726                 $rcid = $wgRequest->getVal( 'rcid' );
 727                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 728                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 729                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 730                 $oldid = $this->getOldID();
 731
 732                 $contentHandler = ContentHandler::getForTitle( $this->getTitle() );
 733                 $de = $contentHandler->getDifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 734
 735                 // DifferenceEngine directly fetched the revision:
 736                 $this->mRevIdFetched = $de->mNewid;
 737                 $de->showDiffPage( $diffOnly );
 738
 739                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 740                         # Run view updates for current revision only
 741                         $this->mPage->doViewUpdates( $wgUser );
 742                 }
 743         }
 744
 745         /**
 746          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 747          * Article::view() only.
 748          *
 749          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 750          * page views.
 751          */
 752         protected function showCssOrJsPage( $showCacheHint = true ) {
 753                 global $wgOut;
 754
 755                 if ( $showCacheHint ) {
 756                         $dir = $this->getContext()->getLanguage()->getDir();
 757                         $lang = $this->getContext()->getLanguage()->getCode();
 758
 759                         $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 760                                 'clearyourcache' );
 761                 }
 762
 763                 // Give hooks a chance to customise the output
 764                 if ( !Hooks::isRegistered('ShowRawCssJs') || wfRunHooks( 'ShowRawCssJs', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated #FIXME: hook is deprecated
 765                         $po = $this->mContentObject->getParserOutput();
 766                         $wgOut->addHTML( $po->getText() );
 767                 }
 768         }
 769
 770         /**
 771          * Get the robot policy to be used for the current view
 772          * @param $action String the action= GET parameter
 773          * @param $pOutput ParserOutput
 774          * @return Array the policy that should be set
 775          * TODO: actions other than 'view'
 776          */
 777         public function getRobotPolicy( $action, $pOutput ) {
 778                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 779                 global $wgDefaultRobotPolicy, $wgRequest;
 780
 781                 $ns = $this->getTitle()->getNamespace();
 782
 783                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 784                         # Don't index user and user talk pages for blocked users (bug 11443)
 785                         if ( !$this->getTitle()->isSubpage() ) {
 786                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 787                                         return array(
 788                                                 'index'  => 'noindex',
 789                                                 'follow' => 'nofollow'
 790                                         );
 791                                 }
 792                         }
 793                 }
 794
 795                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 796                         # Non-articles (special pages etc), and old revisions
 797                         return array(
 798                                 'index'  => 'noindex',
 799                                 'follow' => 'nofollow'
 800                         );
 801                 } elseif ( $wgOut->isPrintable() ) {
 802                         # Discourage indexing of printable versions, but encourage following
 803                         return array(
 804                                 'index'  => 'noindex',
 805                                 'follow' => 'follow'
 806                         );
 807                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 808                         # For ?curid=x urls, disallow indexing
 809                         return array(
 810                                 'index'  => 'noindex',
 811                                 'follow' => 'follow'
 812                         );
 813                 }
 814
 815                 # Otherwise, construct the policy based on the various config variables.
 816                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 817
 818                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 819                         # Honour customised robot policies for this namespace
 820                         $policy = array_merge(
 821                                 $policy,
 822                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 823                         );
 824                 }
 825                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 826                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 827                         # a final sanity check that we have really got the parser output.
 828                         $policy = array_merge(
 829                                 $policy,
 830                                 array( 'index' => $pOutput->getIndexPolicy() )
 831                         );
 832                 }
 833
 834                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 835                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 836                         $policy = array_merge(
 837                                 $policy,
 838                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 839                         );
 840                 }
 841
 842                 return $policy;
 843         }
 844
 845         /**
 846          * Converts a String robot policy into an associative array, to allow
 847          * merging of several policies using array_merge().
 848          * @param $policy Mixed, returns empty array on null/false/'', transparent
 849          *            to already-converted arrays, converts String.
 850          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 851          */
 852         public static function formatRobotPolicy( $policy ) {
 853                 if ( is_array( $policy ) ) {
 854                         return $policy;
 855                 } elseif ( !$policy ) {
 856                         return array();
 857                 }
 858
 859                 $policy = explode( ',', $policy );
 860                 $policy = array_map( 'trim', $policy );
 861
 862                 $arr = array();
 863                 foreach ( $policy as $var ) {
 864                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 865                                 $arr['index'] = $var;
 866                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 867                                 $arr['follow'] = $var;
 868                         }
 869                 }
 870
 871                 return $arr;
 872         }
 873
 874         /**
 875          * If this request is a redirect view, send "redirected from" subtitle to
 876          * $wgOut. Returns true if the header was needed, false if this is not a
 877          * redirect view. Handles both local and remote redirects.
 878          *
 879          * @return boolean
 880          */
 881         public function showRedirectedFromHeader() {
 882                 global $wgOut, $wgRequest, $wgRedirectSources;
 883
 884                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 885
 886                 if ( isset( $this->mRedirectedFrom ) ) {
 887                         // This is an internally redirected page view.
 888                         // We'll need a backlink to the source page for navigation.
 889                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 890                                 $redir = Linker::linkKnown(
 891                                         $this->mRedirectedFrom,
 892                                         null,
 893                                         array(),
 894                                         array( 'redirect' => 'no' )
 895                                 );
 896
 897                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 898
 899                                 // Set the fragment if one was specified in the redirect
 900                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 901                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 902                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 903                                 }
 904
 905                                 // Add a <link rel="canonical"> tag
 906                                 $wgOut->addLink( array( 'rel' => 'canonical',
 907                                         'href' => $this->getTitle()->getLocalURL() )
 908                                 );
 909
 910                                 // Tell $wgOut the user arrived at this article through a redirect
 911                                 $wgOut->setRedirectedFrom( $this->mRedirectedFrom );
 912
 913                                 return true;
 914                         }
 915                 } elseif ( $rdfrom ) {
 916                         // This is an externally redirected view, from some other wiki.
 917                         // If it was reported from a trusted site, supply a backlink.
 918                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 919                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 920                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 921
 922                                 return true;
 923                         }
 924                 }
 925
 926                 return false;
 927         }
 928
 929         /**
 930          * Show a header specific to the namespace currently being viewed, like
 931          * [[MediaWiki:Talkpagetext]]. For Article::view().
 932          */
 933         public function showNamespaceHeader() {
 934                 global $wgOut;
 935
 936                 if ( $this->getTitle()->isTalkPage() ) {
 937                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 938                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 939                         }
 940                 }
 941         }
 942
 943         /**
 944          * Show the footer section of an ordinary page view
 945          */
 946         public function showViewFooter() {
 947                 global $wgOut;
 948
 949                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 950                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 951                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 952                 }
 953
 954                 # If we have been passed an &rcid= parameter, we want to give the user a
 955                 # chance to mark this new article as patrolled.
 956                 $this->showPatrolFooter();
 957
 958                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 959
 960         }
 961
 962         /**
 963          * If patrol is possible, output a patrol UI box. This is called from the
 964          * footer section of ordinary page views. If patrol is not possible or not
 965          * desired, does nothing.
 966          */
 967         public function showPatrolFooter() {
 968                 global $wgOut, $wgRequest, $wgUser;
 969
 970                 $rcid = $wgRequest->getVal( 'rcid' );
 971
 972                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 973                         return;
 974                 }
 975
 976                 $token = $wgUser->getEditToken( $rcid );
 977                 $wgOut->preventClickjacking();
 978
 979                 $wgOut->addHTML(
 980                         "<div class='patrollink'>" .
 981                                 wfMsgHtml(
 982                                         'markaspatrolledlink',
 983                                         Linker::link(
 984                                                 $this->getTitle(),
 985                                                 wfMsgHtml( 'markaspatrolledtext' ),
 986                                                 array(),
 987                                                 array(
 988                                                         'action' => 'markpatrolled',
 989                                                         'rcid' => $rcid,
 990                                                         'token' => $token,
 991                                                 ),
 992                                                 array( 'known', 'noclasses' )
 993                                         )
 994                                 ) .
 995                         '</div>'
 996                 );
 997         }
 998
 999         /**
1000          * Show the error text for a missing article. For articles in the MediaWiki
1001          * namespace, show the default message text. To be called from Article::view().
1002          */
1003         public function showMissingArticle() {
1004                 global $wgOut, $wgRequest, $wgUser, $wgSend404Code;
1005
1006                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1007                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
1008                         $parts = explode( '/', $this->getTitle()->getText() );
1009                         $rootPart = $parts[0];
1010                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1011                         $ip = User::isIP( $rootPart );
1012
1013                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1014                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1015                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1016                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1017                                 LogEventsList::showLogExtract(
1018                                         $wgOut,
1019                                         'block',
1020                                         $user->getUserPage()->getPrefixedText(),
1021                                         '',
1022                                         array(
1023                                                 'lim' => 1,
1024                                                 'showIfEmpty' => false,
1025                                                 'msgKey' => array(
1026                                                         'blocked-notice-logextract',
1027                                                         $user->getName() # Support GENDER in notice
1028                                                 )
1029                                         )
1030                                 );
1031                         }
1032                 }
1033
1034                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1035
1036                 # Show delete and move logs
1037                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
1038                         array(  'lim' => 10,
1039                                 'conds' => array( "log_action != 'revision'" ),
1040                                 'showIfEmpty' => false,
1041                                 'msgKey' => array( 'moveddeleted-notice' ) )
1042                 );
1043
1044                 # Show error message
1045                 $oldid = $this->getOldID();
1046                 if ( $oldid ) {
1047                         $text = wfMsgNoTrans( 'missing-article',
1048                                 $this->getTitle()->getPrefixedText(),
1049                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
1050                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1051                         // Use the default message text
1052                         $text = $this->getTitle()->getDefaultMessageText();
1053                 } else {
1054                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
1055                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
1056                         $errors = array_merge( $createErrors, $editErrors );
1057
1058                         if ( !count( $errors ) ) {
1059                                 $text = wfMsgNoTrans( 'noarticletext' );
1060                         } else {
1061                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1062                         }
1063                 }
1064                 $text = "<div class='noarticletext'>\n$text\n</div>";
1065
1066                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1067                         // If there's no backing content, send a 404 Not Found
1068                         // for better machine handling of broken links.
1069                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
1070                 }
1071
1072                 $wgOut->addWikiText( $text );
1073         }
1074
1075         /**
1076          * If the revision requested for view is deleted, check permissions.
1077          * Send either an error message or a warning header to $wgOut.
1078          *
1079          * @return boolean true if the view is allowed, false if not.
1080          */
1081         public function showDeletedRevisionHeader() {
1082                 global $wgOut, $wgRequest;
1083
1084                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1085                         // Not deleted
1086                         return true;
1087                 }
1088
1089                 // If the user is not allowed to see it...
1090                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1091                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1092                                 'rev-deleted-text-permission' );
1093
1094                         return false;
1095                 // If the user needs to confirm that they want to see it...
1096                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1097                         # Give explanation and add a link to view the revision...
1098                         $oldid = intval( $this->getOldID() );
1099                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1100                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1101                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1102                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1103                                 array( $msg, $link ) );
1104
1105                         return false;
1106                 // We are allowed to see...
1107                 } else {
1108                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1109                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1110                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1111
1112                         return true;
1113                 }
1114         }
1115
1116         /**
1117          * Generate the navigation links when browsing through an article revisions
1118          * It shows the information as:
1119          *   Revision as of \<date\>; view current revision
1120          *   \<- Previous version | Next Version -\>
1121          *
1122          * @param $oldid String: revision ID of this article revision
1123          */
1124         public function setOldSubtitle( $oldid = 0 ) {
1125                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1126
1127                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1128                         return;
1129                 }
1130
1131                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1132
1133                 # Cascade unhide param in links for easy deletion browsing
1134                 $extraParams = array();
1135                 if ( $wgRequest->getVal( 'unhide' ) ) {
1136                         $extraParams['unhide'] = 1;
1137                 }
1138
1139                 $revision = Revision::newFromId( $oldid );
1140                 $timestamp = $revision->getTimestamp();
1141
1142                 $current = ( $oldid == $this->mPage->getLatest() );
1143                 $td = $wgLang->timeanddate( $timestamp, true );
1144                 $tddate = $wgLang->date( $timestamp, true );
1145                 $tdtime = $wgLang->time( $timestamp, true );
1146
1147                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1148                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1149
1150                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1151                         ? 'revision-info-current'
1152                         : 'revision-info';
1153
1154                 $wgOut->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1155                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1156                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1157
1158                 $lnk = $current
1159                         ? wfMsgHtml( 'currentrevisionlink' )
1160                         : Linker::link(
1161                                 $this->getTitle(),
1162                                 wfMsgHtml( 'currentrevisionlink' ),
1163                                 array(),
1164                                 $extraParams,
1165                                 array( 'known', 'noclasses' )
1166                         );
1167                 $curdiff = $current
1168                         ? wfMsgHtml( 'diff' )
1169                         : Linker::link(
1170                                 $this->getTitle(),
1171                                 wfMsgHtml( 'diff' ),
1172                                 array(),
1173                                 array(
1174                                         'diff' => 'cur',
1175                                         'oldid' => $oldid
1176                                 ) + $extraParams,
1177                                 array( 'known', 'noclasses' )
1178                         );
1179                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1180                 $prevlink = $prev
1181                         ? Linker::link(
1182                                 $this->getTitle(),
1183                                 wfMsgHtml( 'previousrevision' ),
1184                                 array(),
1185                                 array(
1186                                         'direction' => 'prev',
1187                                         'oldid' => $oldid
1188                                 ) + $extraParams,
1189                                 array( 'known', 'noclasses' )
1190                         )
1191                         : wfMsgHtml( 'previousrevision' );
1192                 $prevdiff = $prev
1193                         ? Linker::link(
1194                                 $this->getTitle(),
1195                                 wfMsgHtml( 'diff' ),
1196                                 array(),
1197                                 array(
1198                                         'diff' => 'prev',
1199                                         'oldid' => $oldid
1200                                 ) + $extraParams,
1201                                 array( 'known', 'noclasses' )
1202                         )
1203                         : wfMsgHtml( 'diff' );
1204                 $nextlink = $current
1205                         ? wfMsgHtml( 'nextrevision' )
1206                         : Linker::link(
1207                                 $this->getTitle(),
1208                                 wfMsgHtml( 'nextrevision' ),
1209                                 array(),
1210                                 array(
1211                                         'direction' => 'next',
1212                                         'oldid' => $oldid
1213                                 ) + $extraParams,
1214                                 array( 'known', 'noclasses' )
1215                         );
1216                 $nextdiff = $current
1217                         ? wfMsgHtml( 'diff' )
1218                         : Linker::link(
1219                                 $this->getTitle(),
1220                                 wfMsgHtml( 'diff' ),
1221                                 array(),
1222                                 array(
1223                                         'diff' => 'next',
1224                                         'oldid' => $oldid
1225                                 ) + $extraParams,
1226                                 array( 'known', 'noclasses' )
1227                         );
1228
1229                 $cdel = Linker::getRevDeleteLink( $wgUser, $revision, $this->getTitle() );
1230                 if ( $cdel !== '' ) {
1231                         $cdel .= ' ';
1232                 }
1233
1234                 $wgOut->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1235                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1236                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1237         }
1238
1239         /**
1240          * View redirect
1241          *
1242          * @param $target Title|Array of destination(s) to redirect
1243          * @param $appendSubtitle Boolean [optional]
1244          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1245          * @return string containing HMTL with redirect link
1246          */
1247         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1248                 global $wgOut, $wgStylePath;
1249
1250                 if ( !is_array( $target ) ) {
1251                         $target = array( $target );
1252                 }
1253
1254                 $lang = $this->getTitle()->getPageLanguage();
1255                 $imageDir = $lang->getDir();
1256
1257                 if ( $appendSubtitle ) {
1258                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1259                 }
1260
1261                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1262
1263                 /**
1264                  * @var $title Title
1265                  */
1266                 $title = array_shift( $target );
1267
1268                 if ( $forceKnown ) {
1269                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1270                 } else {
1271                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1272                 }
1273
1274                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1275                 $alt = $lang->isRTL() ? '←' : '→';
1276                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1277                 foreach ( $target as $rt ) {
1278                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1279                         if ( $forceKnown ) {
1280                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1281                         } else {
1282                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1283                         }
1284                 }
1285
1286                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1287                 return '<div class="redirectMsg">' .
1288                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1289                         '<span class="redirectText">' . $link . '</span></div>';
1290         }
1291
1292         /**
1293          * Handle action=render
1294          */
1295         public function render() {
1296                 global $wgOut;
1297
1298                 $wgOut->setArticleBodyOnly( true );
1299                 $this->view();
1300         }
1301
1302         /**
1303          * action=protect handler
1304          */
1305         public function protect() {
1306                 $form = new ProtectionForm( $this );
1307                 $form->execute();
1308         }
1309
1310         /**
1311          * action=unprotect handler (alias)
1312          */
1313         public function unprotect() {
1314                 $this->protect();
1315         }
1316
1317         /**
1318          * UI entry point for page deletion
1319          */
1320         public function delete() {
1321                 global $wgOut, $wgRequest, $wgLang;
1322
1323                 # This code desperately needs to be totally rewritten
1324
1325                 $title = $this->getTitle();
1326                 $user = $this->getContext()->getUser();
1327
1328                 # Check permissions
1329                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1330                 if ( count( $permission_errors ) ) {
1331                         throw new PermissionsError( 'delete', $permission_errors );
1332                 }
1333
1334                 # Read-only check...
1335                 if ( wfReadOnly() ) {
1336                         throw new ReadOnlyError;
1337                 }
1338
1339                 # Better double-check that it hasn't been deleted yet!
1340                 $dbw = wfGetDB( DB_MASTER );
1341                 $conds = $title->pageCond();
1342                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1343                 if ( $latest === false ) {
1344                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1345                         $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1346                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1347                                 );
1348                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1349                         LogEventsList::showLogExtract(
1350                                 $wgOut,
1351                                 'delete',
1352                                 $title->getPrefixedText()
1353                         );
1354
1355                         return;
1356                 }
1357
1358                 $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1359                 $deleteReason = $wgRequest->getText( 'wpReason' );
1360
1361                 if ( $deleteReasonList == 'other' ) {
1362                         $reason = $deleteReason;
1363                 } elseif ( $deleteReason != '' ) {
1364                         // Entry from drop down menu + additional comment
1365                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1366                 } else {
1367                         $reason = $deleteReasonList;
1368                 }
1369
1370                 if ( $wgRequest->wasPosted() && $user->matchEditToken( $wgRequest->getVal( 'wpEditToken' ),
1371                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1372                 {
1373                         # Flag to hide all contents of the archived revisions
1374                         $suppress = $wgRequest->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1375
1376                         $this->doDelete( $reason, $suppress );
1377
1378                         if ( $wgRequest->getCheck( 'wpWatch' ) && $user->isLoggedIn() ) {
1379                                 $this->doWatch();
1380                         } elseif ( $title->userIsWatching() ) {
1381                                 $this->doUnwatch();
1382                         }
1383
1384                         return;
1385                 }
1386
1387                 // Generate deletion reason
1388                 $hasHistory = false;
1389                 if ( !$reason ) {
1390                         try {
1391                                 $reason = $this->generateReason( $hasHistory );
1392                         } catch (MWException $e) {
1393                                 # if a page is horribly broken, we still want to be able to delete it. so be lenient about errors here.
1394                                 wfDebug("Error while building auto delete summary: $e");
1395                                 $reason = '';
1396                         }
1397                 }
1398
1399                 // If the page has a history, insert a warning
1400                 if ( $hasHistory ) {
1401                         $revisions = $this->mTitle->estimateRevisionCount();
1402                         // @todo FIXME: i18n issue/patchwork message
1403                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1404                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1405                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1406                                         wfMsgHtml( 'history' ),
1407                                         array( 'rel' => 'archives' ),
1408                                         array( 'action' => 'history' ) ) .
1409                                 '</strong>'
1410                         );
1411
1412                         if ( $this->mTitle->isBigDeletion() ) {
1413                                 global $wgDeleteRevisionsLimit;
1414                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1415                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1416                         }
1417                 }
1418
1419                 return $this->confirmDelete( $reason );
1420         }
1421
1422         /**
1423          * Output deletion confirmation dialog
1424          * @todo FIXME: Move to another file?
1425          * @param $reason String: prefilled reason
1426          */
1427         public function confirmDelete( $reason ) {
1428                 global $wgOut;
1429
1430                 wfDebug( "Article::confirmDelete\n" );
1431
1432                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1433                 $wgOut->addBacklinkSubtitle( $this->getTitle() );
1434                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1435                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1436
1437                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1438
1439                 $user = $this->getContext()->getUser();
1440
1441                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1442                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1443                                         <td></td>
1444                                         <td class='mw-input'><strong>" .
1445                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1446                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1447                                         "</strong></td>
1448                                 </tr>";
1449                 } else {
1450                         $suppress = '';
1451                 }
1452                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1453
1454                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1455                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1456                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1457                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1458                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1459                         "<tr id=\"wpDeleteReasonListRow\">
1460                                 <td class='mw-label'>" .
1461                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1462                                 "</td>
1463                                 <td class='mw-input'>" .
1464                                         Xml::listDropDown( 'wpDeleteReasonList',
1465                                                 wfMsgForContent( 'deletereason-dropdown' ),
1466                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1467                                 "</td>
1468                         </tr>
1469                         <tr id=\"wpDeleteReasonRow\">
1470                                 <td class='mw-label'>" .
1471                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1472                                 "</td>
1473                                 <td class='mw-input'>" .
1474                                 Html::input( 'wpReason', $reason, 'text', array(
1475                                         'size' => '60',
1476                                         'maxlength' => '255',
1477                                         'tabindex' => '2',
1478                                         'id' => 'wpReason',
1479                                         'autofocus'
1480                                 ) ) .
1481                                 "</td>
1482                         </tr>";
1483
1484                 # Disallow watching if user is not logged in
1485                 if ( $user->isLoggedIn() ) {
1486                         $form .= "
1487                         <tr>
1488                                 <td></td>
1489                                 <td class='mw-input'>" .
1490                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1491                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1492                                 "</td>
1493                         </tr>";
1494                 }
1495
1496                 $form .= "
1497                         $suppress
1498                         <tr>
1499                                 <td></td>
1500                                 <td class='mw-submit'>" .
1501                                         Xml::submitButton( wfMsg( 'deletepage' ),
1502                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1503                                 "</td>
1504                         </tr>" .
1505                         Xml::closeElement( 'table' ) .
1506                         Xml::closeElement( 'fieldset' ) .
1507                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1508                         Xml::closeElement( 'form' );
1509
1510                         if ( $user->isAllowed( 'editinterface' ) ) {
1511                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1512                                 $link = Linker::link(
1513                                         $title,
1514                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1515                                         array(),
1516                                         array( 'action' => 'edit' )
1517                                 );
1518                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1519                         }
1520
1521                 $wgOut->addHTML( $form );
1522                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1523                 LogEventsList::showLogExtract( $wgOut, 'delete',
1524                         $this->getTitle()->getPrefixedText()
1525                 );
1526         }
1527
1528         /**
1529          * Perform a deletion and output success or failure messages
1530          * @param $reason
1531          * @param $suppress bool
1532          */
1533         public function doDelete( $reason, $suppress = false ) {
1534                 global $wgOut;
1535
1536                 $error = '';
1537                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, 0, true, $error ) ) {
1538                         $deleted = $this->getTitle()->getPrefixedText();
1539
1540                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1541                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1542
1543                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1544
1545                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1546                         $wgOut->returnToMain( false );
1547                 } else {
1548                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1549                         if ( $error == '' ) {
1550                                 $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1551                                         array( 'cannotdelete', wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1552                                 );
1553                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1554
1555                                 LogEventsList::showLogExtract(
1556                                         $wgOut,
1557                                         'delete',
1558                                         $this->getTitle()->getPrefixedText()
1559                                 );
1560                         } else {
1561                                 $wgOut->addHTML( $error );
1562                         }
1563                 }
1564         }
1565
1566         /* Caching functions */
1567
1568         /**
1569          * checkLastModified returns true if it has taken care of all
1570          * output to the client that is necessary for this request.
1571          * (that is, it has sent a cached version of the page)
1572          *
1573          * @return boolean true if cached version send, false otherwise
1574          */
1575         protected function tryFileCache() {
1576                 static $called = false;
1577
1578                 if ( $called ) {
1579                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1580                         return false;
1581                 }
1582
1583                 $called = true;
1584                 if ( $this->isFileCacheable() ) {
1585                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1586                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1587                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1588                                 $cache->loadFromFileCache( $this->getContext() );
1589                                 return true;
1590                         } else {
1591                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1592                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1593                         }
1594                 } else {
1595                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1596                 }
1597
1598                 return false;
1599         }
1600
1601         /**
1602          * Check if the page can be cached
1603          * @return bool
1604          */
1605         public function isFileCacheable() {
1606                 $cacheable = false;
1607
1608                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1609                         $cacheable = $this->mPage->getID()
1610                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1611                         // Extension may have reason to disable file caching on some pages.
1612                         if ( $cacheable ) {
1613                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1614                         }
1615                 }
1616
1617                 return $cacheable;
1618         }
1619
1620         /**#@-*/
1621
1622         /**
1623          * Lightweight method to get the parser output for a page, checking the parser cache
1624          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1625          * consider, so it's not appropriate to use there.
1626          *
1627          * @since 1.16 (r52326) for LiquidThreads
1628          *
1629          * @param $oldid mixed integer Revision ID or null
1630          * @param $user User The relevant user
1631          * @return ParserOutput or false if the given revsion ID is not found
1632          */
1633         public function getParserOutput( $oldid = null, User $user = null ) {
1634                 global $wgUser;
1635
1636                 $user = is_null( $user ) ? $wgUser : $user;
1637                 $parserOptions = $this->mPage->makeParserOptions( $user );
1638
1639                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1640         }
1641
1642         /**
1643          * Get parser options suitable for rendering the primary article wikitext
1644          * @return ParserOptions|false
1645          */
1646         public function getParserOptions() {
1647                 global $wgUser;
1648                 if ( !$this->mParserOptions ) {
1649                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1650                 }
1651                 // Clone to allow modifications of the return value without affecting cache
1652                 return clone $this->mParserOptions;
1653         }
1654
1655         /**
1656          * Sets the context this Article is executed in
1657          *
1658          * @param $context IContextSource
1659          * @since 1.18
1660          */
1661         public function setContext( $context ) {
1662                 $this->mContext = $context;
1663         }
1664
1665         /**
1666          * Gets the context this Article is executed in
1667          *
1668          * @return IContextSource
1669          * @since 1.18
1670          */
1671         public function getContext() {
1672                 if ( $this->mContext instanceof IContextSource ) {
1673                         return $this->mContext;
1674                 } else {
1675                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1676                         return RequestContext::getMain();
1677                 }
1678         }
1679
1680         /**
1681          * Info about this page
1682          * @deprecated since 1.19
1683          */
1684         public function info() {
1685                 wfDeprecated( __METHOD__, '1.19' );
1686                 Action::factory( 'info', $this )->show();
1687         }
1688
1689         /**
1690          * Mark this particular edit/page as patrolled
1691          * @deprecated since 1.18
1692          */
1693         public function markpatrolled() {
1694                 wfDeprecated( __METHOD__, '1.18' );
1695                 Action::factory( 'markpatrolled', $this )->show();
1696         }
1697
1698         /**
1699          * Handle action=purge
1700          * @deprecated since 1.19
1701          */
1702         public function purge() {
1703                 return Action::factory( 'purge', $this )->show();
1704         }
1705
1706         /**
1707          * Handle action=revert
1708          * @deprecated since 1.19
1709          */
1710         public function revert() {
1711                 wfDeprecated( __METHOD__, '1.19' );
1712                 Action::factory( 'revert', $this )->show();
1713         }
1714
1715         /**
1716          * Handle action=rollback
1717          * @deprecated since 1.19
1718          */
1719         public function rollback() {
1720                 wfDeprecated( __METHOD__, '1.19' );
1721                 Action::factory( 'rollback', $this )->show();
1722         }
1723
1724         /**
1725          * User-interface handler for the "watch" action.
1726          * Requires Request to pass a token as of 1.18.
1727          * @deprecated since 1.18
1728          */
1729         public function watch() {
1730                 wfDeprecated( __METHOD__, '1.18' );
1731                 Action::factory( 'watch', $this )->show();
1732         }
1733
1734         /**
1735          * Add this page to $wgUser's watchlist
1736          *
1737          * This is safe to be called multiple times
1738          *
1739          * @return bool true on successful watch operation
1740          * @deprecated since 1.18
1741          */
1742         public function doWatch() {
1743                 global $wgUser;
1744                 wfDeprecated( __METHOD__, '1.18' );
1745                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1746         }
1747
1748         /**
1749          * User interface handler for the "unwatch" action.
1750          * Requires Request to pass a token as of 1.18.
1751          * @deprecated since 1.18
1752          */
1753         public function unwatch() {
1754                 wfDeprecated( __METHOD__, '1.18' );
1755                 Action::factory( 'unwatch', $this )->show();
1756         }
1757
1758         /**
1759          * Stop watching a page
1760          * @return bool true on successful unwatch
1761          * @deprecated since 1.18
1762          */
1763         public function doUnwatch() {
1764                 global $wgUser;
1765                 wfDeprecated( __METHOD__, '1.18' );
1766                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1767         }
1768
1769         /**
1770          * Output a redirect back to the article.
1771          * This is typically used after an edit.
1772          *
1773          * @deprecated in 1.18; call $wgOut->redirect() directly
1774          * @param $noRedir Boolean: add redirect=no
1775          * @param $sectionAnchor String: section to redirect to, including "#"
1776          * @param $extraQuery String: extra query params
1777          */
1778         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1779                 wfDeprecated( __METHOD__, '1.18' );
1780                 global $wgOut;
1781
1782                 if ( $noRedir ) {
1783                         $query = 'redirect=no';
1784                         if ( $extraQuery )
1785                                 $query .= "&$extraQuery";
1786                 } else {
1787                         $query = $extraQuery;
1788                 }
1789
1790                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1791         }
1792
1793         /**
1794          * Use PHP's magic __get handler to handle accessing of
1795          * raw WikiPage fields for backwards compatibility.
1796          *
1797          * @param $fname String Field name
1798          */
1799         public function __get( $fname ) {
1800                 if ( property_exists( $this->mPage, $fname ) ) {
1801                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1802                         return $this->mPage->$fname;
1803                 }
1804                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1805         }
1806
1807         /**
1808          * Use PHP's magic __set handler to handle setting of
1809          * raw WikiPage fields for backwards compatibility.
1810          *
1811          * @param $fname String Field name
1812          * @param $fvalue mixed New value
1813          */
1814         public function __set( $fname, $fvalue ) {
1815                 if ( property_exists( $this->mPage, $fname ) ) {
1816                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1817                         $this->mPage->$fname = $fvalue;
1818                 // Note: extensions may want to toss on new fields
1819                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1820                         $this->mPage->$fname = $fvalue;
1821                 } else {
1822                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1823                 }
1824         }
1825
1826         /**
1827          * Use PHP's magic __call handler to transform instance calls to
1828          * WikiPage functions for backwards compatibility.
1829          *
1830          * @param $fname String Name of called method
1831          * @param $args Array Arguments to the method
1832          */
1833         public function __call( $fname, $args ) {
1834                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1835                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1836                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1837                 }
1838                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1839         }
1840
1841         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1842
1843         /**
1844          * @param $limit array
1845          * @param $expiry array
1846          * @param $cascade bool
1847          * @param $reason string
1848          * @param $user User
1849          * @return Status
1850          */
1851         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1852                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1853         }
1854
1855         /**
1856          * @param $limit array
1857          * @param $reason string
1858          * @param $cascade int
1859          * @param $expiry array
1860          * @return bool
1861          */
1862         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1863                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1864         }
1865
1866         /**
1867          * @param $reason string
1868          * @param $suppress bool
1869          * @param $id int
1870          * @param $commit bool
1871          * @param $error string
1872          * @return bool
1873          */
1874         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1875                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1876         }
1877
1878         /**
1879          * @param $fromP
1880          * @param $summary
1881          * @param $token
1882          * @param $bot
1883          * @param $resultDetails
1884          * @param $user User
1885          * @return array
1886          */
1887         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1888                 global $wgUser;
1889                 $user = is_null( $user ) ? $wgUser : $user;
1890                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1891         }
1892
1893         /**
1894          * @param $fromP
1895          * @param $summary
1896          * @param $bot
1897          * @param $resultDetails
1898          * @param $guser User
1899          * @return array
1900          */
1901         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1902                 global $wgUser;
1903                 $guser = is_null( $guser ) ? $wgUser : $guser;
1904                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1905         }
1906
1907         /**
1908          * @param $hasHistory bool
1909          * @return mixed
1910          */
1911         public function generateReason( &$hasHistory ) {
1912                 $title = $this->mPage->getTitle();
1913                 $handler = ContentHandler::getForTitle( $title );
1914                 return $handler->getAutoDeleteReason( $title, $hasHistory );
1915         }
1916
1917         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1918
1919         /**
1920          * @return array
1921          */
1922         public static function selectFields() {
1923                 return WikiPage::selectFields();
1924         }
1925
1926         /**
1927          * @param $title Title
1928          */
1929         public static function onArticleCreate( $title ) {
1930                 WikiPage::onArticleCreate( $title );
1931         }
1932
1933         /**
1934          * @param $title Title
1935          */
1936         public static function onArticleDelete( $title ) {
1937                 WikiPage::onArticleDelete( $title );
1938         }
1939
1940         /**
1941          * @param $title Title
1942          */
1943         public static function onArticleEdit( $title ) {
1944                 WikiPage::onArticleEdit( $title );
1945         }
1946
1947         /**
1948          * @param $oldtext
1949          * @param $newtext
1950          * @param $flags
1951          * @return string
1952          * @deprecated since 1.20, use ContentHandler::getAutosummary() instead
1953          */
1954         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1955                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1956         }
1957         // ******
1958 }