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
  42         /**
  43          * @var Content
  44          */
  45         var $mContentObject;
  46
  47         var $mContentLoaded = false;      // !<
  48         var $mOldId;                      // !<
  49
  50         /**
  51          * @var Title
  52          */
  53         var $mRedirectedFrom = null;
  54
  55         /**
  56          * @var mixed: boolean false or URL string
  57          */
  58         var $mRedirectUrl = false;        // !<
  59         var $mRevIdFetched = 0;           // !<
  60
  61         /**
  62          * @var Revision
  63          */
  64         var $mRevision = null;
  65
  66         /**
  67          * @var ParserOutput
  68          */
  69         var $mParserOutput;
  70
  71         /**@}}*/
  72
  73         /**
  74          * Constructor and clear the article
  75          * @param $title Title Reference to a Title object.
  76          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  77          */
  78         public function __construct( Title $title, $oldId = null ) {
  79                 $this->mOldId = $oldId;
  80                 $this->mPage = $this->newPage( $title );
  81         }
  82
  83         /**
  84          * @param $title Title
  85          * @return WikiPage
  86          */
  87         protected function newPage( Title $title ) {
  88                 return new WikiPage( $title );
  89         }
  90
  91         /**
  92          * Constructor from a page id
  93          * @param $id Int article ID to load
  94          * @return Article|null
  95          */
  96         public static function newFromID( $id ) {
  97                 $t = Title::newFromID( $id );
  98                 # @todo FIXME: Doesn't inherit right
  99                 return $t == null ? null : new self( $t );
 100                 # return $t == null ? null : new static( $t ); // PHP 5.3
 101         }
 102
 103         /**
 104          * Create an Article object of the appropriate class for the given page.
 105          *
 106          * @param $title Title
 107          * @param $context IContextSource
 108          * @return Article object
 109          */
 110         public static function newFromTitle( $title, IContextSource $context ) {
 111                 if ( NS_MEDIA == $title->getNamespace() ) {
 112                         // FIXME: where should this go?
 113                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 114                 }
 115
 116                 $page = null;
 117                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 118                 if ( !$page ) {
 119                         switch( $title->getNamespace() ) {
 120                                 case NS_FILE:
 121                                         $page = new ImagePage( $title ); #FIXME: teach ImagePage to use ContentHandler
 122                                         break;
 123                                 case NS_CATEGORY:
 124                                         $page = new CategoryPage( $title ); #FIXME: teach ImagePage to use ContentHandler
 125                                         break;
 126                                 default:
 127                                         $handler = ContentHandler::getForTitle( $title );
 128                                         $page = $handler->createArticle( $title );
 129                         }
 130                 }
 131                 $page->setContext( $context );
 132
 133                 return $page;
 134         }
 135
 136         /**
 137          * Create an Article object of the appropriate class for the given page.
 138          *
 139          * @param $page WikiPage
 140          * @param $context IContextSource
 141          * @return Article object
 142          */
 143         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 144                 $article = self::newFromTitle( $page->getTitle(), $context );
 145                 $article->mPage = $page; // override to keep process cached vars
 146                 return $article;
 147         }
 148
 149         /**
 150          * Tell the page view functions that this view was redirected
 151          * from another page on the wiki.
 152          * @param $from Title object.
 153          */
 154         public function setRedirectedFrom( Title $from ) {
 155                 $this->mRedirectedFrom = $from;
 156         }
 157
 158         /**
 159          * Get the title object of the article
 160          *
 161          * @return Title object of this page
 162          */
 163         public function getTitle() {
 164                 return $this->mPage->getTitle();
 165         }
 166
 167         /**
 168          * Get the WikiPage object of this instance
 169          *
 170          * @since 1.19
 171          * @return WikiPage
 172          */
 173         public function getPage() {
 174                 return $this->mPage;
 175         }
 176
 177         /**
 178          * Clear the object
 179          */
 180         public function clear() {
 181                 $this->mContentLoaded = false;
 182
 183                 $this->mRedirectedFrom = null; # Title object if set
 184                 $this->mRevIdFetched = 0;
 185                 $this->mRedirectUrl = false;
 186
 187                 $this->mPage->clear();
 188         }
 189
 190         /**
 191          * Note that getContent/loadContent do not follow redirects anymore.
 192          * If you need to fetch redirectable content easily, try
 193          * the shortcut in WikiPage::getRedirectTarget()
 194          *
 195          * This function has side effects! Do not use this function if you
 196          * only want the real revision text if any.
 197          *
 198          * @deprecated in 1.20; use getContentObject() instead
 199          *
 200          * @return string The text of this revision
 201          */
 202         public function getContent() {
 203                 wfDeprecated( __METHOD__, '1.20' );
 204                 $content = $this->getContentObject();
 205                 return ContentHandler::getContentText( $content );
 206         }
 207
 208         /**
 209          * Note that getContent/loadContent do not follow redirects anymore.
 210          * If you need to fetch redirectable content easily, try
 211          * the shortcut in WikiPage::getRedirectTarget()
 212          *
 213          * This function has side effects! Do not use this function if you
 214          * only want the real revision text if any.
 215          *
 216          * @return Content
 217          */
 218    public function getContentObject() {
 219                 global $wgUser;
 220
 221                 wfProfileIn( __METHOD__ );
 222
 223                 if ( $this->mPage->getID() === 0 ) {
 224                         # If this is a MediaWiki:x message, then load the messages
 225                         # and return the message value for x.
 226                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 227                                 $text = $this->getTitle()->getDefaultMessageText();
 228                                 if ( $text === false ) {
 229                                         $text = '';
 230                                 }
 231
 232                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 233                         } else {
 234                                 $content = new MessageContent( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', null, 'parsemag' );
 235                         }
 236                         wfProfileOut( __METHOD__ );
 237
 238                         return $content;
 239                 } else {
 240                         $this->fetchContentObject();
 241                         wfProfileOut( __METHOD__ );
 242
 243                         return $this->mContentObject;
 244                 }
 245         }
 246
 247         /**
 248          * @return int The oldid of the article that is to be shown, 0 for the
 249          *             current revision
 250          */
 251         public function getOldID() {
 252                 if ( is_null( $this->mOldId ) ) {
 253                         $this->mOldId = $this->getOldIDFromRequest();
 254                 }
 255
 256                 return $this->mOldId;
 257         }
 258
 259         /**
 260          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 261          *
 262          * @return int The old id for the request
 263          */
 264         public function getOldIDFromRequest() {
 265                 global $wgRequest;
 266
 267                 $this->mRedirectUrl = false;
 268
 269                 $oldid = $wgRequest->getIntOrNull( 'oldid' );
 270
 271                 if ( $oldid === null ) {
 272                         return 0;
 273                 }
 274
 275                 if ( $oldid !== 0 ) {
 276                         # Load the given revision and check whether the page is another one.
 277                         # In that case, update this instance to reflect the change.
 278                         if ( $oldid === $this->mPage->getLatest() ) {
 279                                 $this->mRevision = $this->mPage->getRevision();
 280                         } else {
 281                                 $this->mRevision = Revision::newFromId( $oldid );
 282                                 if ( $this->mRevision !== null ) {
 283                                         // Revision title doesn't match the page title given?
 284                                         if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 285                                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 286                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 287                                         }
 288                                 }
 289                         }
 290                 }
 291
 292                 if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 293                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 294                         if ( $nextid ) {
 295                                 $oldid = $nextid;
 296                                 $this->mRevision = null;
 297                         } else {
 298                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 299                         }
 300                 } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 301                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 302                         if ( $previd ) {
 303                                 $oldid = $previd;
 304                                 $this->mRevision = null;
 305                         }
 306                 }
 307
 308                 return $oldid;
 309         }
 310
 311         /**
 312          * Load the revision (including text) into this object
 313          *
 314          * @deprecated in 1.19; use fetchContent()
 315          */
 316         function loadContent() {
 317                 wfDeprecated( __METHOD__, '1.19' );
 318                 $this->fetchContent();
 319         }
 320
 321         /**
 322          * Get text of an article from database
 323          * Does *NOT* follow redirects.
 324          *
 325          * @return mixed string containing article contents, or false if null
 326          * @deprecated in 1.20, use getContentObject() instead
 327          */
 328         protected function fetchContent() { #BC cruft!
 329                 wfDeprecated( __METHOD__, '1.20' );
 330
 331                 if ( $this->mContentLoaded && $this->mContent ) {
 332                         return $this->mContent;
 333                 }
 334
 335                 wfProfileIn( __METHOD__ );
 336
 337                 $content = $this->fetchContentObject();
 338
 339                 $this->mContent = ContentHandler::getContentText( $content ); #FIXME: get rid of mContent everywhere!
 340                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ); #BC cruft!
 341
 342                 wfProfileOut( __METHOD__ );
 343
 344                 return $this->mContent;
 345         }
 346
 347
 348         /**
 349          * Get text content object
 350          * Does *NOT* follow redirects.
 351          * TODO: when is this null?
 352          *
 353          * @return Content|null
 354          */
 355         protected function fetchContentObject() {
 356                 if ( $this->mContentLoaded ) {
 357                         return $this->mContentObject;
 358                 }
 359
 360                 wfProfileIn( __METHOD__ );
 361
 362                 $this->mContentLoaded = true;
 363                 $this->mContent = null;
 364
 365                 $oldid = $this->getOldID();
 366
 367                 # Pre-fill content with error message so that if something
 368                 # fails we'll have something telling us what we intended.
 369                 $t = $this->getTitle()->getPrefixedText();
 370                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 371                 $this->mContentObject = new MessageContent( 'missing-article', array($t, $d), array() ) ;
 372
 373                 if ( $oldid ) {
 374                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 375                         if ( !$this->mRevision ) {
 376                                 $this->mRevision = Revision::newFromId( $oldid );
 377                                 if ( !$this->mRevision ) {
 378                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 379                                         wfProfileOut( __METHOD__ );
 380                                         return false;
 381                                 }
 382                         }
 383                 } else {
 384                         if ( !$this->mPage->getLatest() ) {
 385                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 386                                 wfProfileOut( __METHOD__ );
 387                                 return false;
 388                         }
 389
 390                         $this->mRevision = $this->mPage->getRevision();
 391
 392                         if ( !$this->mRevision ) {
 393                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 394                                 wfProfileOut( __METHOD__ );
 395                                 return false;
 396                         }
 397                 }
 398
 399                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 400                 // We should instead work with the Revision object when we need it...
 401                 $this->mContentObject = $this->mRevision->getContent( Revision::FOR_THIS_USER ); // Loads if user is allowed
 402                 $this->mRevIdFetched = $this->mRevision->getId();
 403
 404                 wfRunHooks( 'ArticleAfterFetchContentObject', array( &$this, &$this->mContentObject ) ); #FIXME: register new hook
 405
 406                 wfProfileOut( __METHOD__ );
 407
 408                 return $this->mContentObject;
 409         }
 410
 411         /**
 412          * No-op
 413          * @deprecated since 1.18
 414          */
 415         public function forUpdate() {
 416                 wfDeprecated( __METHOD__, '1.18' );
 417         }
 418
 419         /**
 420          * Returns true if the currently-referenced revision is the current edit
 421          * to this page (and it exists).
 422          * @return bool
 423          */
 424         public function isCurrent() {
 425                 # If no oldid, this is the current version.
 426                 if ( $this->getOldID() == 0 ) {
 427                         return true;
 428                 }
 429
 430                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 431         }
 432
 433         /**
 434          * Get the fetched Revision object depending on request parameters or null
 435          * on failure.
 436          *
 437          * @since 1.19
 438          * @return Revision|null
 439          */
 440         public function getRevisionFetched() {
 441                 $this->fetchContentObject();
 442
 443                 return $this->mRevision;
 444         }
 445
 446         /**
 447          * Use this to fetch the rev ID used on page views
 448          *
 449          * @return int revision ID of last article revision
 450          */
 451         public function getRevIdFetched() {
 452                 if ( $this->mRevIdFetched ) {
 453                         return $this->mRevIdFetched;
 454                 } else {
 455                         return $this->mPage->getLatest();
 456                 }
 457         }
 458
 459         /**
 460          * This is the default action of the index.php entry point: just view the
 461          * page of the given title.
 462          */
 463         public function view() {
 464                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 465                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 466
 467                 wfProfileIn( __METHOD__ );
 468
 469                 # Get variables from query string
 470                 # As side effect this will load the revision and update the title
 471                 # in a revision ID is passed in the request, so this should remain
 472                 # the first call of this method even if $oldid is used way below.
 473                 $oldid = $this->getOldID();
 474
 475                 # Another whitelist check in case getOldID() is altering the title
 476                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $wgUser );
 477                 if ( count( $permErrors ) ) {
 478                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 479                         wfProfileOut( __METHOD__ );
 480                         throw new PermissionsError( 'read', $permErrors );
 481                 }
 482
 483                 # getOldID() may as well want us to redirect somewhere else
 484                 if ( $this->mRedirectUrl ) {
 485                         $wgOut->redirect( $this->mRedirectUrl );
 486                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 487                         wfProfileOut( __METHOD__ );
 488
 489                         return;
 490                 }
 491
 492                 # If we got diff in the query, we want to see a diff page instead of the article.
 493                 if ( $wgRequest->getCheck( 'diff' ) ) {
 494                         wfDebug( __METHOD__ . ": showing diff page\n" );
 495                         $this->showDiffPage();
 496                         wfProfileOut( __METHOD__ );
 497
 498                         return;
 499                 }
 500
 501                 # Set page title (may be overridden by DISPLAYTITLE)
 502                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 503
 504                 $wgOut->setArticleFlag( true );
 505                 # Allow frames by default
 506                 $wgOut->allowClickjacking();
 507
 508                 $parserCache = ParserCache::singleton();
 509
 510                 $parserOptions = $this->getParserOptions();
 511                 # Render printable version, use printable version cache
 512                 if ( $wgOut->isPrintable() ) {
 513                         $parserOptions->setIsPrintable( true );
 514                         $parserOptions->setEditSection( false );
 515                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit' ) ) {
 516                         $parserOptions->setEditSection( false );
 517                 }
 518
 519                 # Try client and file cache
 520                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 521                         if ( $wgUseETag ) {
 522                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 523                         }
 524
 525                         # Is it client cached?
 526                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 527                                 wfDebug( __METHOD__ . ": done 304\n" );
 528                                 wfProfileOut( __METHOD__ );
 529
 530                                 return;
 531                         # Try file cache
 532                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 533                                 wfDebug( __METHOD__ . ": done file cache\n" );
 534                                 # tell wgOut that output is taken care of
 535                                 $wgOut->disable();
 536                                 $this->mPage->doViewUpdates( $wgUser );
 537                                 wfProfileOut( __METHOD__ );
 538
 539                                 return;
 540                         }
 541                 }
 542
 543                 # Should the parser cache be used?
 544                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 545                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 546                 if ( $wgUser->getStubThreshold() ) {
 547                         wfIncrStats( 'pcache_miss_stub' );
 548                 }
 549
 550                 $this->showRedirectedFromHeader();
 551                 $this->showNamespaceHeader();
 552
 553                 # Iterate through the possible ways of constructing the output text.
 554                 # Keep going until $outputDone is set, or we run out of things to do.
 555                 $pass = 0;
 556                 $outputDone = false;
 557                 $this->mParserOutput = false;
 558
 559                 while ( !$outputDone && ++$pass ) {
 560                         switch( $pass ) {
 561                                 case 1:
 562                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 563                                         break;
 564                                 case 2:
 565                                         # Early abort if the page doesn't exist
 566                                         if ( !$this->mPage->exists() ) {
 567                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 568                                                 $this->showMissingArticle();
 569                                                 wfProfileOut( __METHOD__ );
 570                                                 return;
 571                                         }
 572
 573                                         # Try the parser cache
 574                                         if ( $useParserCache ) {
 575                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 576
 577                                                 if ( $this->mParserOutput !== false ) {
 578                                                         if ( $oldid ) {
 579                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 580                                                                 $this->setOldSubtitle( $oldid );
 581                                                         } else {
 582                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 583                                                         }
 584                                                         $wgOut->addParserOutput( $this->mParserOutput );
 585                                                         # Ensure that UI elements requiring revision ID have
 586                                                         # the correct version information.
 587                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 588                                                         # Preload timestamp to avoid a DB hit
 589                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 590                                                         if ( $cachedTimestamp !== null ) {
 591                                                                 $wgOut->setRevisionTimestamp( $cachedTimestamp );
 592                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 593                                                         }
 594                                                         $outputDone = true;
 595                                                 }
 596                                         }
 597                                         break;
 598                                 case 3:
 599                                         # This will set $this->mRevision if needed
 600                                         $this->fetchContentObject();
 601
 602                                         # Are we looking at an old revision
 603                                         if ( $oldid && $this->mRevision ) {
 604                                                 $this->setOldSubtitle( $oldid );
 605
 606                                                 if ( !$this->showDeletedRevisionHeader() ) {
 607                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 608                                                         wfProfileOut( __METHOD__ );
 609                                                         return;
 610                                                 }
 611                                         }
 612
 613                                         # Ensure that UI elements requiring revision ID have
 614                                         # the correct version information.
 615                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 616                                         # Preload timestamp to avoid a DB hit
 617                                         $wgOut->setRevisionTimestamp( $this->getTimestamp() );
 618
 619                                         # Pages containing custom CSS or JavaScript get special treatment
 620                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 621                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 622                                                 $this->showCssOrJsPage();
 623                                                 $outputDone = true;
 624                                         } elseif( !wfRunHooks( 'ArticleContentViewCustom', array( $this->fetchContentObject(), $this->getTitle(), $wgOut ) ) ) { #FIXME: document new hook!
 625                                                 # Allow extensions do their own custom view for certain pages
 626                                                 $outputDone = true;
 627                                         } elseif( Hooks::isRegistered( 'ArticleViewCustom' ) && !wfRunHooks( 'ArticleViewCustom', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated! #FIXME: deprecate hook!
 628                                                 # Allow extensions do their own custom view for certain pages
 629                                                 $outputDone = true;
 630                                         } else {
 631                                                 $content = $this->getContentObject();
 632                                                 $rt = $content->getRedirectChain();
 633                                                 if ( $rt ) {
 634                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 635                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 636                                                         $wgOut->addHTML( $this->viewRedirect( $rt ) );
 637                                                         # Parse just to get categories, displaytitle, etc.
 638                                                         $this->mParserOutput = $content->getParserOutput( $this->getTitle(), $oldid, $parserOptions );
 639                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 640                                                         $outputDone = true;
 641                                                 }
 642                                         }
 643                                         break;
 644                                 case 4:
 645                                         # Run the parse, protected by a pool counter
 646                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 647
 648                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 649                                                 $this->getRevIdFetched(), $useParserCache, $this->getContentObject() );
 650
 651                                         if ( !$poolArticleView->execute() ) {
 652                                                 $error = $poolArticleView->getError();
 653                                                 if ( $error ) {
 654                                                         $wgOut->clearHTML(); // for release() errors
 655                                                         $wgOut->enableClientCache( false );
 656                                                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 657
 658                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 659                                                         $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 660                                                 }
 661                                                 # Connection or timeout error
 662                                                 wfProfileOut( __METHOD__ );
 663                                                 return;
 664                                         }
 665
 666                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 667                                         $wgOut->addParserOutput( $this->mParserOutput );
 668
 669                                         # Don't cache a dirty ParserOutput object
 670                                         if ( $poolArticleView->getIsDirty() ) {
 671                                                 $wgOut->setSquidMaxage( 0 );
 672                                                 $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 673                                         }
 674
 675                                         $outputDone = true;
 676                                         break;
 677                                 # Should be unreachable, but just in case...
 678                                 default:
 679                                         break 2;
 680                         }
 681                 }
 682
 683                 # Get the ParserOutput actually *displayed* here.
 684                 # Note that $this->mParserOutput is the *current* version output.
 685                 $pOutput = ( $outputDone instanceof ParserOutput )
 686                         ? $outputDone // object fetched by hook
 687                         : $this->mParserOutput;
 688
 689                 # Adjust title for main page & pages with displaytitle
 690                 if ( $pOutput ) {
 691                         $this->adjustDisplayTitle( $pOutput );
 692                 }
 693
 694                 # For the main page, overwrite the <title> element with the con-
 695                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 696                 # that's not empty).
 697                 # This message always exists because it is in the i18n files
 698                 if ( $this->getTitle()->isMainPage() ) {
 699                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 700                         if ( !$msg->isDisabled() ) {
 701                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 702                         }
 703                 }
 704
 705                 # Check for any __NOINDEX__ tags on the page using $pOutput
 706                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 707                 $wgOut->setIndexPolicy( $policy['index'] );
 708                 $wgOut->setFollowPolicy( $policy['follow'] );
 709
 710                 $this->showViewFooter();
 711                 $this->mPage->doViewUpdates( $wgUser );
 712
 713                 wfProfileOut( __METHOD__ );
 714         }
 715
 716         /**
 717          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 718          * @param $pOutput ParserOutput
 719          */
 720         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 721                 global $wgOut;
 722                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 723                 $titleText = $pOutput->getTitleText();
 724                 if ( strval( $titleText ) !== '' ) {
 725                         $wgOut->setPageTitle( $titleText );
 726                 }
 727         }
 728
 729         /**
 730          * Show a diff page according to current request variables. For use within
 731          * Article::view() only, other callers should use the DifferenceEngine class.
 732          */
 733         public function showDiffPage() {
 734                 global $wgRequest, $wgUser;
 735
 736                 $diff = $wgRequest->getVal( 'diff' );
 737                 $rcid = $wgRequest->getVal( 'rcid' );
 738                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 739                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 740                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 741                 $oldid = $this->getOldID();
 742
 743                 $contentHandler = ContentHandler::getForTitle( $this->getTitle() );
 744                 $de = $contentHandler->getDifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 745
 746                 // DifferenceEngine directly fetched the revision:
 747                 $this->mRevIdFetched = $de->mNewid;
 748                 $de->showDiffPage( $diffOnly );
 749
 750                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 751                         # Run view updates for current revision only
 752                         $this->mPage->doViewUpdates( $wgUser );
 753                 }
 754         }
 755
 756         /**
 757          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 758          * Article::view() only.
 759          *
 760          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 761          * page views.
 762          */
 763         protected function showCssOrJsPage( $showCacheHint = true ) {
 764                 global $wgOut;
 765
 766                 if ( $showCacheHint ) {
 767                         $dir = $this->getContext()->getLanguage()->getDir();
 768                         $lang = $this->getContext()->getLanguage()->getCode();
 769
 770                         $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 771                                 'clearyourcache' );
 772                 }
 773
 774                 // Give hooks a chance to customise the output
 775                 if ( !Hooks::isRegistered('ShowRawCssJs') || wfRunHooks( 'ShowRawCssJs', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated #FIXME: hook is deprecated
 776                         $po = $this->mContentObject->getParserOutput();
 777                         $wgOut->addHTML( $po->getText() );
 778                 }
 779         }
 780
 781         /**
 782          * Get the robot policy to be used for the current view
 783          * @param $action String the action= GET parameter
 784          * @param $pOutput ParserOutput
 785          * @return Array the policy that should be set
 786          * TODO: actions other than 'view'
 787          */
 788         public function getRobotPolicy( $action, $pOutput ) {
 789                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 790                 global $wgDefaultRobotPolicy, $wgRequest;
 791
 792                 $ns = $this->getTitle()->getNamespace();
 793
 794                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 795                         # Don't index user and user talk pages for blocked users (bug 11443)
 796                         if ( !$this->getTitle()->isSubpage() ) {
 797                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 798                                         return array(
 799                                                 'index'  => 'noindex',
 800                                                 'follow' => 'nofollow'
 801                                         );
 802                                 }
 803                         }
 804                 }
 805
 806                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 807                         # Non-articles (special pages etc), and old revisions
 808                         return array(
 809                                 'index'  => 'noindex',
 810                                 'follow' => 'nofollow'
 811                         );
 812                 } elseif ( $wgOut->isPrintable() ) {
 813                         # Discourage indexing of printable versions, but encourage following
 814                         return array(
 815                                 'index'  => 'noindex',
 816                                 'follow' => 'follow'
 817                         );
 818                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 819                         # For ?curid=x urls, disallow indexing
 820                         return array(
 821                                 'index'  => 'noindex',
 822                                 'follow' => 'follow'
 823                         );
 824                 }
 825
 826                 # Otherwise, construct the policy based on the various config variables.
 827                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 828
 829                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 830                         # Honour customised robot policies for this namespace
 831                         $policy = array_merge(
 832                                 $policy,
 833                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 834                         );
 835                 }
 836                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 837                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 838                         # a final sanity check that we have really got the parser output.
 839                         $policy = array_merge(
 840                                 $policy,
 841                                 array( 'index' => $pOutput->getIndexPolicy() )
 842                         );
 843                 }
 844
 845                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 846                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 847                         $policy = array_merge(
 848                                 $policy,
 849                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 850                         );
 851                 }
 852
 853                 return $policy;
 854         }
 855
 856         /**
 857          * Converts a String robot policy into an associative array, to allow
 858          * merging of several policies using array_merge().
 859          * @param $policy Mixed, returns empty array on null/false/'', transparent
 860          *            to already-converted arrays, converts String.
 861          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 862          */
 863         public static function formatRobotPolicy( $policy ) {
 864                 if ( is_array( $policy ) ) {
 865                         return $policy;
 866                 } elseif ( !$policy ) {
 867                         return array();
 868                 }
 869
 870                 $policy = explode( ',', $policy );
 871                 $policy = array_map( 'trim', $policy );
 872
 873                 $arr = array();
 874                 foreach ( $policy as $var ) {
 875                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 876                                 $arr['index'] = $var;
 877                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 878                                 $arr['follow'] = $var;
 879                         }
 880                 }
 881
 882                 return $arr;
 883         }
 884
 885         /**
 886          * If this request is a redirect view, send "redirected from" subtitle to
 887          * $wgOut. Returns true if the header was needed, false if this is not a
 888          * redirect view. Handles both local and remote redirects.
 889          *
 890          * @return boolean
 891          */
 892         public function showRedirectedFromHeader() {
 893                 global $wgOut, $wgRequest, $wgRedirectSources;
 894
 895                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 896
 897                 if ( isset( $this->mRedirectedFrom ) ) {
 898                         // This is an internally redirected page view.
 899                         // We'll need a backlink to the source page for navigation.
 900                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 901                                 $redir = Linker::linkKnown(
 902                                         $this->mRedirectedFrom,
 903                                         null,
 904                                         array(),
 905                                         array( 'redirect' => 'no' )
 906                                 );
 907
 908                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 909
 910                                 // Set the fragment if one was specified in the redirect
 911                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 912                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 913                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 914                                 }
 915
 916                                 // Add a <link rel="canonical"> tag
 917                                 $wgOut->addLink( array( 'rel' => 'canonical',
 918                                         'href' => $this->getTitle()->getLocalURL() )
 919                                 );
 920
 921                                 // Tell $wgOut the user arrived at this article through a redirect
 922                                 $wgOut->setRedirectedFrom( $this->mRedirectedFrom );
 923
 924                                 return true;
 925                         }
 926                 } elseif ( $rdfrom ) {
 927                         // This is an externally redirected view, from some other wiki.
 928                         // If it was reported from a trusted site, supply a backlink.
 929                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 930                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 931                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 932
 933                                 return true;
 934                         }
 935                 }
 936
 937                 return false;
 938         }
 939
 940         /**
 941          * Show a header specific to the namespace currently being viewed, like
 942          * [[MediaWiki:Talkpagetext]]. For Article::view().
 943          */
 944         public function showNamespaceHeader() {
 945                 global $wgOut;
 946
 947                 if ( $this->getTitle()->isTalkPage() ) {
 948                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 949                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 950                         }
 951                 }
 952         }
 953
 954         /**
 955          * Show the footer section of an ordinary page view
 956          */
 957         public function showViewFooter() {
 958                 global $wgOut;
 959
 960                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 961                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 962                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 963                 }
 964
 965                 # If we have been passed an &rcid= parameter, we want to give the user a
 966                 # chance to mark this new article as patrolled.
 967                 $this->showPatrolFooter();
 968
 969                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 970
 971         }
 972
 973         /**
 974          * If patrol is possible, output a patrol UI box. This is called from the
 975          * footer section of ordinary page views. If patrol is not possible or not
 976          * desired, does nothing.
 977          */
 978         public function showPatrolFooter() {
 979                 global $wgOut, $wgRequest, $wgUser;
 980
 981                 $rcid = $wgRequest->getVal( 'rcid' );
 982
 983                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 984                         return;
 985                 }
 986
 987                 $token = $wgUser->getEditToken( $rcid );
 988                 $wgOut->preventClickjacking();
 989
 990                 $wgOut->addHTML(
 991                         "<div class='patrollink'>" .
 992                                 wfMsgHtml(
 993                                         'markaspatrolledlink',
 994                                         Linker::link(
 995                                                 $this->getTitle(),
 996                                                 wfMsgHtml( 'markaspatrolledtext' ),
 997                                                 array(),
 998                                                 array(
 999                                                         'action' => 'markpatrolled',
1000                                                         'rcid' => $rcid,
1001                                                         'token' => $token,
1002                                                 ),
1003                                                 array( 'known', 'noclasses' )
1004                                         )
1005                                 ) .
1006                         '</div>'
1007                 );
1008         }
1009
1010         /**
1011          * Show the error text for a missing article. For articles in the MediaWiki
1012          * namespace, show the default message text. To be called from Article::view().
1013          */
1014         public function showMissingArticle() {
1015                 global $wgOut, $wgRequest, $wgUser, $wgSend404Code;
1016
1017                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1018                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
1019                         $parts = explode( '/', $this->getTitle()->getText() );
1020                         $rootPart = $parts[0];
1021                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1022                         $ip = User::isIP( $rootPart );
1023
1024                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1025                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1026                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1027                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1028                                 LogEventsList::showLogExtract(
1029                                         $wgOut,
1030                                         'block',
1031                                         $user->getUserPage()->getPrefixedText(),
1032                                         '',
1033                                         array(
1034                                                 'lim' => 1,
1035                                                 'showIfEmpty' => false,
1036                                                 'msgKey' => array(
1037                                                         'blocked-notice-logextract',
1038                                                         $user->getName() # Support GENDER in notice
1039                                                 )
1040                                         )
1041                                 );
1042                         }
1043                 }
1044
1045                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1046
1047                 # Show delete and move logs
1048                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
1049                         array(  'lim' => 10,
1050                                 'conds' => array( "log_action != 'revision'" ),
1051                                 'showIfEmpty' => false,
1052                                 'msgKey' => array( 'moveddeleted-notice' ) )
1053                 );
1054
1055                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1056                         // If there's no backing content, send a 404 Not Found
1057                         // for better machine handling of broken links.
1058                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
1059                 }
1060
1061                 $hookResult = wfRunHooks( 'BeforeDisplayNoArticleText', array( $this ) );
1062
1063                 if ( ! $hookResult ) {
1064                         return;
1065                 }
1066
1067                 # Show error message
1068                 $oldid = $this->getOldID();
1069                 if ( $oldid ) {
1070                         $text = wfMsgNoTrans( 'missing-article',
1071                                 $this->getTitle()->getPrefixedText(),
1072                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
1073                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1074                         // Use the default message text
1075                         $text = $this->getTitle()->getDefaultMessageText();
1076                 } else {
1077                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
1078                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
1079                         $errors = array_merge( $createErrors, $editErrors );
1080
1081                         if ( !count( $errors ) ) {
1082                                 $text = wfMsgNoTrans( 'noarticletext' );
1083                         } else {
1084                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1085                         }
1086                 }
1087                 $text = "<div class='noarticletext'>\n$text\n</div>";
1088
1089                 $wgOut->addWikiText( $text );
1090         }
1091
1092         /**
1093          * If the revision requested for view is deleted, check permissions.
1094          * Send either an error message or a warning header to $wgOut.
1095          *
1096          * @return boolean true if the view is allowed, false if not.
1097          */
1098         public function showDeletedRevisionHeader() {
1099                 global $wgOut, $wgRequest;
1100
1101                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1102                         // Not deleted
1103                         return true;
1104                 }
1105
1106                 // If the user is not allowed to see it...
1107                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1108                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1109                                 'rev-deleted-text-permission' );
1110
1111                         return false;
1112                 // If the user needs to confirm that they want to see it...
1113                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1114                         # Give explanation and add a link to view the revision...
1115                         $oldid = intval( $this->getOldID() );
1116                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1117                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1118                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1119                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1120                                 array( $msg, $link ) );
1121
1122                         return false;
1123                 // We are allowed to see...
1124                 } else {
1125                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1126                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1127                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1128
1129                         return true;
1130                 }
1131         }
1132
1133         /**
1134          * Generate the navigation links when browsing through an article revisions
1135          * It shows the information as:
1136          *   Revision as of \<date\>; view current revision
1137          *   \<- Previous version | Next Version -\>
1138          *
1139          * @param $oldid String: revision ID of this article revision
1140          */
1141         public function setOldSubtitle( $oldid = 0 ) {
1142                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1143
1144                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1145                         return;
1146                 }
1147
1148                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1149
1150                 # Cascade unhide param in links for easy deletion browsing
1151                 $extraParams = array();
1152                 if ( $unhide ) {
1153                         $extraParams['unhide'] = 1;
1154                 }
1155
1156                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1157                         $revision = $this->mRevision;
1158                 } else {
1159                         $revision = Revision::newFromId( $oldid );
1160                 }
1161
1162                 $timestamp = $revision->getTimestamp();
1163
1164                 $current = ( $oldid == $this->mPage->getLatest() );
1165                 $td = $wgLang->timeanddate( $timestamp, true );
1166                 $tddate = $wgLang->date( $timestamp, true );
1167                 $tdtime = $wgLang->time( $timestamp, true );
1168
1169                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1170                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1171
1172                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1173                         ? 'revision-info-current'
1174                         : 'revision-info';
1175
1176                 $wgOut->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1177                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1178                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1179
1180                 $lnk = $current
1181                         ? wfMsgHtml( 'currentrevisionlink' )
1182                         : Linker::link(
1183                                 $this->getTitle(),
1184                                 wfMsgHtml( 'currentrevisionlink' ),
1185                                 array(),
1186                                 $extraParams,
1187                                 array( 'known', 'noclasses' )
1188                         );
1189                 $curdiff = $current
1190                         ? wfMsgHtml( 'diff' )
1191                         : Linker::link(
1192                                 $this->getTitle(),
1193                                 wfMsgHtml( 'diff' ),
1194                                 array(),
1195                                 array(
1196                                         'diff' => 'cur',
1197                                         'oldid' => $oldid
1198                                 ) + $extraParams,
1199                                 array( 'known', 'noclasses' )
1200                         );
1201                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1202                 $prevlink = $prev
1203                         ? Linker::link(
1204                                 $this->getTitle(),
1205                                 wfMsgHtml( 'previousrevision' ),
1206                                 array(),
1207                                 array(
1208                                         'direction' => 'prev',
1209                                         'oldid' => $oldid
1210                                 ) + $extraParams,
1211                                 array( 'known', 'noclasses' )
1212                         )
1213                         : wfMsgHtml( 'previousrevision' );
1214                 $prevdiff = $prev
1215                         ? Linker::link(
1216                                 $this->getTitle(),
1217                                 wfMsgHtml( 'diff' ),
1218                                 array(),
1219                                 array(
1220                                         'diff' => 'prev',
1221                                         'oldid' => $oldid
1222                                 ) + $extraParams,
1223                                 array( 'known', 'noclasses' )
1224                         )
1225                         : wfMsgHtml( 'diff' );
1226                 $nextlink = $current
1227                         ? wfMsgHtml( 'nextrevision' )
1228                         : Linker::link(
1229                                 $this->getTitle(),
1230                                 wfMsgHtml( 'nextrevision' ),
1231                                 array(),
1232                                 array(
1233                                         'direction' => 'next',
1234                                         'oldid' => $oldid
1235                                 ) + $extraParams,
1236                                 array( 'known', 'noclasses' )
1237                         );
1238                 $nextdiff = $current
1239                         ? wfMsgHtml( 'diff' )
1240                         : Linker::link(
1241                                 $this->getTitle(),
1242                                 wfMsgHtml( 'diff' ),
1243                                 array(),
1244                                 array(
1245                                         'diff' => 'next',
1246                                         'oldid' => $oldid
1247                                 ) + $extraParams,
1248                                 array( 'known', 'noclasses' )
1249                         );
1250
1251                 $cdel = Linker::getRevDeleteLink( $wgUser, $revision, $this->getTitle() );
1252                 if ( $cdel !== '' ) {
1253                         $cdel .= ' ';
1254                 }
1255
1256                 $wgOut->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1257                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1258                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1259         }
1260
1261         /**
1262          * View redirect
1263          *
1264          * @param $target Title|Array of destination(s) to redirect
1265          * @param $appendSubtitle Boolean [optional]
1266          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1267          * @return string containing HMTL with redirect link
1268          */
1269         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1270                 global $wgOut, $wgStylePath;
1271
1272                 if ( !is_array( $target ) ) {
1273                         $target = array( $target );
1274                 }
1275
1276                 $lang = $this->getTitle()->getPageLanguage();
1277                 $imageDir = $lang->getDir();
1278
1279                 if ( $appendSubtitle ) {
1280                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1281                 }
1282
1283                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1284
1285                 /**
1286                  * @var $title Title
1287                  */
1288                 $title = array_shift( $target );
1289
1290                 if ( $forceKnown ) {
1291                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1292                 } else {
1293                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1294                 }
1295
1296                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1297                 $alt = $lang->isRTL() ? '←' : '→';
1298                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1299                 foreach ( $target as $rt ) {
1300                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1301                         if ( $forceKnown ) {
1302                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1303                         } else {
1304                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1305                         }
1306                 }
1307
1308                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1309                 return '<div class="redirectMsg">' .
1310                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1311                         '<span class="redirectText">' . $link . '</span></div>';
1312         }
1313
1314         /**
1315          * Handle action=render
1316          */
1317         public function render() {
1318                 global $wgOut;
1319
1320                 $wgOut->setArticleBodyOnly( true );
1321                 $this->view();
1322         }
1323
1324         /**
1325          * action=protect handler
1326          */
1327         public function protect() {
1328                 $form = new ProtectionForm( $this );
1329                 $form->execute();
1330         }
1331
1332         /**
1333          * action=unprotect handler (alias)
1334          */
1335         public function unprotect() {
1336                 $this->protect();
1337         }
1338
1339         /**
1340          * UI entry point for page deletion
1341          */
1342         public function delete() {
1343                 global $wgOut, $wgRequest, $wgLang;
1344
1345                 # This code desperately needs to be totally rewritten
1346
1347                 $title = $this->getTitle();
1348                 $user = $this->getContext()->getUser();
1349
1350                 # Check permissions
1351                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1352                 if ( count( $permission_errors ) ) {
1353                         throw new PermissionsError( 'delete', $permission_errors );
1354                 }
1355
1356                 # Read-only check...
1357                 if ( wfReadOnly() ) {
1358                         throw new ReadOnlyError;
1359                 }
1360
1361                 # Better double-check that it hasn't been deleted yet!
1362                 $dbw = wfGetDB( DB_MASTER );
1363                 $conds = $title->pageCond();
1364                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1365                 if ( $latest === false ) {
1366                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1367                         $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1368                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1369                                 );
1370                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1371                         LogEventsList::showLogExtract(
1372                                 $wgOut,
1373                                 'delete',
1374                                 $title->getPrefixedText()
1375                         );
1376
1377                         return;
1378                 }
1379
1380                 $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1381                 $deleteReason = $wgRequest->getText( 'wpReason' );
1382
1383                 if ( $deleteReasonList == 'other' ) {
1384                         $reason = $deleteReason;
1385                 } elseif ( $deleteReason != '' ) {
1386                         // Entry from drop down menu + additional comment
1387                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1388                 } else {
1389                         $reason = $deleteReasonList;
1390                 }
1391
1392                 if ( $wgRequest->wasPosted() && $user->matchEditToken( $wgRequest->getVal( 'wpEditToken' ),
1393                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1394                 {
1395                         # Flag to hide all contents of the archived revisions
1396                         $suppress = $wgRequest->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1397
1398                         $this->doDelete( $reason, $suppress );
1399
1400                         if ( $wgRequest->getCheck( 'wpWatch' ) && $user->isLoggedIn() ) {
1401                                 $this->doWatch();
1402                         } elseif ( $title->userIsWatching() ) {
1403                                 $this->doUnwatch();
1404                         }
1405
1406                         return;
1407                 }
1408
1409                 // Generate deletion reason
1410                 $hasHistory = false;
1411                 if ( !$reason ) {
1412                         try {
1413                                 $reason = $this->generateReason( $hasHistory );
1414                         } catch (MWException $e) {
1415                                 # if a page is horribly broken, we still want to be able to delete it. so be lenient about errors here.
1416                                 wfDebug("Error while building auto delete summary: $e");
1417                                 $reason = '';
1418                         }
1419                 }
1420
1421                 // If the page has a history, insert a warning
1422                 if ( $hasHistory ) {
1423                         $revisions = $this->mTitle->estimateRevisionCount();
1424                         // @todo FIXME: i18n issue/patchwork message
1425                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1426                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1427                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1428                                         wfMsgHtml( 'history' ),
1429                                         array( 'rel' => 'archives' ),
1430                                         array( 'action' => 'history' ) ) .
1431                                 '</strong>'
1432                         );
1433
1434                         if ( $this->mTitle->isBigDeletion() ) {
1435                                 global $wgDeleteRevisionsLimit;
1436                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1437                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1438                         }
1439                 }
1440
1441                 return $this->confirmDelete( $reason );
1442         }
1443
1444         /**
1445          * Output deletion confirmation dialog
1446          * @todo FIXME: Move to another file?
1447          * @param $reason String: prefilled reason
1448          */
1449         public function confirmDelete( $reason ) {
1450                 global $wgOut;
1451
1452                 wfDebug( "Article::confirmDelete\n" );
1453
1454                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1455                 $wgOut->addBacklinkSubtitle( $this->getTitle() );
1456                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1457                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1458
1459                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1460
1461                 $user = $this->getContext()->getUser();
1462
1463                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1464                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1465                                         <td></td>
1466                                         <td class='mw-input'><strong>" .
1467                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1468                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1469                                         "</strong></td>
1470                                 </tr>";
1471                 } else {
1472                         $suppress = '';
1473                 }
1474                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1475
1476                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1477                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1478                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1479                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1480                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1481                         "<tr id=\"wpDeleteReasonListRow\">
1482                                 <td class='mw-label'>" .
1483                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1484                                 "</td>
1485                                 <td class='mw-input'>" .
1486                                         Xml::listDropDown( 'wpDeleteReasonList',
1487                                                 wfMsgForContent( 'deletereason-dropdown' ),
1488                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1489                                 "</td>
1490                         </tr>
1491                         <tr id=\"wpDeleteReasonRow\">
1492                                 <td class='mw-label'>" .
1493                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1494                                 "</td>
1495                                 <td class='mw-input'>" .
1496                                 Html::input( 'wpReason', $reason, 'text', array(
1497                                         'size' => '60',
1498                                         'maxlength' => '255',
1499                                         'tabindex' => '2',
1500                                         'id' => 'wpReason',
1501                                         'autofocus'
1502                                 ) ) .
1503                                 "</td>
1504                         </tr>";
1505
1506                 # Disallow watching if user is not logged in
1507                 if ( $user->isLoggedIn() ) {
1508                         $form .= "
1509                         <tr>
1510                                 <td></td>
1511                                 <td class='mw-input'>" .
1512                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1513                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1514                                 "</td>
1515                         </tr>";
1516                 }
1517
1518                 $form .= "
1519                         $suppress
1520                         <tr>
1521                                 <td></td>
1522                                 <td class='mw-submit'>" .
1523                                         Xml::submitButton( wfMsg( 'deletepage' ),
1524                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1525                                 "</td>
1526                         </tr>" .
1527                         Xml::closeElement( 'table' ) .
1528                         Xml::closeElement( 'fieldset' ) .
1529                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1530                         Xml::closeElement( 'form' );
1531
1532                         if ( $user->isAllowed( 'editinterface' ) ) {
1533                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1534                                 $link = Linker::link(
1535                                         $title,
1536                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1537                                         array(),
1538                                         array( 'action' => 'edit' )
1539                                 );
1540                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1541                         }
1542
1543                 $wgOut->addHTML( $form );
1544                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1545                 LogEventsList::showLogExtract( $wgOut, 'delete',
1546                         $this->getTitle()->getPrefixedText()
1547                 );
1548         }
1549
1550         /**
1551          * Perform a deletion and output success or failure messages
1552          * @param $reason
1553          * @param $suppress bool
1554          */
1555         public function doDelete( $reason, $suppress = false ) {
1556                 global $wgOut;
1557
1558                 $error = '';
1559                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, 0, true, $error ) ) {
1560                         $deleted = $this->getTitle()->getPrefixedText();
1561
1562                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1563                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1564
1565                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1566
1567                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1568                         $wgOut->returnToMain( false );
1569                 } else {
1570                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1571                         if ( $error == '' ) {
1572                                 $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1573                                         array( 'cannotdelete', wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1574                                 );
1575                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1576
1577                                 LogEventsList::showLogExtract(
1578                                         $wgOut,
1579                                         'delete',
1580                                         $this->getTitle()->getPrefixedText()
1581                                 );
1582                         } else {
1583                                 $wgOut->addHTML( $error );
1584                         }
1585                 }
1586         }
1587
1588         /* Caching functions */
1589
1590         /**
1591          * checkLastModified returns true if it has taken care of all
1592          * output to the client that is necessary for this request.
1593          * (that is, it has sent a cached version of the page)
1594          *
1595          * @return boolean true if cached version send, false otherwise
1596          */
1597         protected function tryFileCache() {
1598                 static $called = false;
1599
1600                 if ( $called ) {
1601                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1602                         return false;
1603                 }
1604
1605                 $called = true;
1606                 if ( $this->isFileCacheable() ) {
1607                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1608                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1609                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1610                                 $cache->loadFromFileCache( $this->getContext() );
1611                                 return true;
1612                         } else {
1613                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1614                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1615                         }
1616                 } else {
1617                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1618                 }
1619
1620                 return false;
1621         }
1622
1623         /**
1624          * Check if the page can be cached
1625          * @return bool
1626          */
1627         public function isFileCacheable() {
1628                 $cacheable = false;
1629
1630                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1631                         $cacheable = $this->mPage->getID()
1632                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1633                         // Extension may have reason to disable file caching on some pages.
1634                         if ( $cacheable ) {
1635                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1636                         }
1637                 }
1638
1639                 return $cacheable;
1640         }
1641
1642         /**#@-*/
1643
1644         /**
1645          * Lightweight method to get the parser output for a page, checking the parser cache
1646          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1647          * consider, so it's not appropriate to use there.
1648          *
1649          * @since 1.16 (r52326) for LiquidThreads
1650          *
1651          * @param $oldid mixed integer Revision ID or null
1652          * @param $user User The relevant user
1653          * @return ParserOutput or false if the given revsion ID is not found
1654          */
1655         public function getParserOutput( $oldid = null, User $user = null ) {
1656                 global $wgUser;
1657
1658                 $user = is_null( $user ) ? $wgUser : $user;
1659                 $parserOptions = $this->mPage->makeParserOptions( $user );
1660
1661                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1662         }
1663
1664         /**
1665          * Get parser options suitable for rendering the primary article wikitext
1666          * @return ParserOptions
1667          */
1668         public function getParserOptions() {
1669                 global $wgUser;
1670                 if ( !$this->mParserOptions ) {
1671                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1672                 }
1673                 // Clone to allow modifications of the return value without affecting cache
1674                 return clone $this->mParserOptions;
1675         }
1676
1677         /**
1678          * Sets the context this Article is executed in
1679          *
1680          * @param $context IContextSource
1681          * @since 1.18
1682          */
1683         public function setContext( $context ) {
1684                 $this->mContext = $context;
1685         }
1686
1687         /**
1688          * Gets the context this Article is executed in
1689          *
1690          * @return IContextSource
1691          * @since 1.18
1692          */
1693         public function getContext() {
1694                 if ( $this->mContext instanceof IContextSource ) {
1695                         return $this->mContext;
1696                 } else {
1697                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1698                         return RequestContext::getMain();
1699                 }
1700         }
1701
1702         /**
1703          * Info about this page
1704          * @deprecated since 1.19
1705          */
1706         public function info() {
1707                 wfDeprecated( __METHOD__, '1.19' );
1708                 Action::factory( 'info', $this )->show();
1709         }
1710
1711         /**
1712          * Mark this particular edit/page as patrolled
1713          * @deprecated since 1.18
1714          */
1715         public function markpatrolled() {
1716                 wfDeprecated( __METHOD__, '1.18' );
1717                 Action::factory( 'markpatrolled', $this )->show();
1718         }
1719
1720         /**
1721          * Handle action=purge
1722          * @deprecated since 1.19
1723          */
1724         public function purge() {
1725                 return Action::factory( 'purge', $this )->show();
1726         }
1727
1728         /**
1729          * Handle action=revert
1730          * @deprecated since 1.19
1731          */
1732         public function revert() {
1733                 wfDeprecated( __METHOD__, '1.19' );
1734                 Action::factory( 'revert', $this )->show();
1735         }
1736
1737         /**
1738          * Handle action=rollback
1739          * @deprecated since 1.19
1740          */
1741         public function rollback() {
1742                 wfDeprecated( __METHOD__, '1.19' );
1743                 Action::factory( 'rollback', $this )->show();
1744         }
1745
1746         /**
1747          * User-interface handler for the "watch" action.
1748          * Requires Request to pass a token as of 1.18.
1749          * @deprecated since 1.18
1750          */
1751         public function watch() {
1752                 wfDeprecated( __METHOD__, '1.18' );
1753                 Action::factory( 'watch', $this )->show();
1754         }
1755
1756         /**
1757          * Add this page to $wgUser's watchlist
1758          *
1759          * This is safe to be called multiple times
1760          *
1761          * @return bool true on successful watch operation
1762          * @deprecated since 1.18
1763          */
1764         public function doWatch() {
1765                 global $wgUser;
1766                 wfDeprecated( __METHOD__, '1.18' );
1767                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1768         }
1769
1770         /**
1771          * User interface handler for the "unwatch" action.
1772          * Requires Request to pass a token as of 1.18.
1773          * @deprecated since 1.18
1774          */
1775         public function unwatch() {
1776                 wfDeprecated( __METHOD__, '1.18' );
1777                 Action::factory( 'unwatch', $this )->show();
1778         }
1779
1780         /**
1781          * Stop watching a page
1782          * @return bool true on successful unwatch
1783          * @deprecated since 1.18
1784          */
1785         public function doUnwatch() {
1786                 global $wgUser;
1787                 wfDeprecated( __METHOD__, '1.18' );
1788                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1789         }
1790
1791         /**
1792          * Output a redirect back to the article.
1793          * This is typically used after an edit.
1794          *
1795          * @deprecated in 1.18; call $wgOut->redirect() directly
1796          * @param $noRedir Boolean: add redirect=no
1797          * @param $sectionAnchor String: section to redirect to, including "#"
1798          * @param $extraQuery String: extra query params
1799          */
1800         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1801                 wfDeprecated( __METHOD__, '1.18' );
1802                 global $wgOut;
1803
1804                 if ( $noRedir ) {
1805                         $query = 'redirect=no';
1806                         if ( $extraQuery )
1807                                 $query .= "&$extraQuery";
1808                 } else {
1809                         $query = $extraQuery;
1810                 }
1811
1812                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1813         }
1814
1815         /**
1816          * Use PHP's magic __get handler to handle accessing of
1817          * raw WikiPage fields for backwards compatibility.
1818          *
1819          * @param $fname String Field name
1820          */
1821         public function __get( $fname ) {
1822                 if ( property_exists( $this->mPage, $fname ) ) {
1823                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1824                         return $this->mPage->$fname;
1825                 }
1826                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1827         }
1828
1829         /**
1830          * Use PHP's magic __set handler to handle setting of
1831          * raw WikiPage fields for backwards compatibility.
1832          *
1833          * @param $fname String Field name
1834          * @param $fvalue mixed New value
1835          */
1836         public function __set( $fname, $fvalue ) {
1837                 if ( property_exists( $this->mPage, $fname ) ) {
1838                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1839                         $this->mPage->$fname = $fvalue;
1840                 // Note: extensions may want to toss on new fields
1841                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1842                         $this->mPage->$fname = $fvalue;
1843                 } else {
1844                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1845                 }
1846         }
1847
1848         /**
1849          * Use PHP's magic __call handler to transform instance calls to
1850          * WikiPage functions for backwards compatibility.
1851          *
1852          * @param $fname String Name of called method
1853          * @param $args Array Arguments to the method
1854          * @return mixed
1855          */
1856         public function __call( $fname, $args ) {
1857                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1858                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1859                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1860                 }
1861                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1862         }
1863
1864         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1865
1866         /**
1867          * @param $limit array
1868          * @param $expiry array
1869          * @param $cascade bool
1870          * @param $reason string
1871          * @param $user User
1872          * @return Status
1873          */
1874         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1875                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1876         }
1877
1878         /**
1879          * @param $limit array
1880          * @param $reason string
1881          * @param $cascade int
1882          * @param $expiry array
1883          * @return bool
1884          */
1885         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1886                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1887         }
1888
1889         /**
1890          * @param $reason string
1891          * @param $suppress bool
1892          * @param $id int
1893          * @param $commit bool
1894          * @param $error string
1895          * @return bool
1896          */
1897         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1898                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1899         }
1900
1901         /**
1902          * @param $fromP
1903          * @param $summary
1904          * @param $token
1905          * @param $bot
1906          * @param $resultDetails
1907          * @param $user User
1908          * @return array
1909          */
1910         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1911                 global $wgUser;
1912                 $user = is_null( $user ) ? $wgUser : $user;
1913                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1914         }
1915
1916         /**
1917          * @param $fromP
1918          * @param $summary
1919          * @param $bot
1920          * @param $resultDetails
1921          * @param $guser User
1922          * @return array
1923          */
1924         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1925                 global $wgUser;
1926                 $guser = is_null( $guser ) ? $wgUser : $guser;
1927                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1928         }
1929
1930         /**
1931          * @param $hasHistory bool
1932          * @return mixed
1933          */
1934         public function generateReason( &$hasHistory ) {
1935                 $title = $this->mPage->getTitle();
1936                 $handler = ContentHandler::getForTitle( $title );
1937                 return $handler->getAutoDeleteReason( $title, $hasHistory );
1938         }
1939
1940         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1941
1942         /**
1943          * @return array
1944          */
1945         public static function selectFields() {
1946                 return WikiPage::selectFields();
1947         }
1948
1949         /**
1950          * @param $title Title
1951          */
1952         public static function onArticleCreate( $title ) {
1953                 WikiPage::onArticleCreate( $title );
1954         }
1955
1956         /**
1957          * @param $title Title
1958          */
1959         public static function onArticleDelete( $title ) {
1960                 WikiPage::onArticleDelete( $title );
1961         }
1962
1963         /**
1964          * @param $title Title
1965          */
1966         public static function onArticleEdit( $title ) {
1967                 WikiPage::onArticleEdit( $title );
1968         }
1969
1970         /**
1971          * @param $oldtext
1972          * @param $newtext
1973          * @param $flags
1974          * @return string
1975          * @deprecated since 1.20, use ContentHandler::getAutosummary() instead
1976          */
1977         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1978                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1979         }
1980         // ******
1981 }