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          * Returns a Content object representing the pages effective display content,
 210      * not necessarily the revision's content!
 211      *
 212      * Note that getContent/loadContent do not follow redirects anymore.
 213          * If you need to fetch redirectable content easily, try
 214          * the shortcut in WikiPage::getRedirectTarget()
 215          *
 216          * This function has side effects! Do not use this function if you
 217          * only want the real revision text if any.
 218          *
 219          * @return Content
 220          */
 221    protected function getContentObject() {
 222                 global $wgUser;
 223
 224                 wfProfileIn( __METHOD__ );
 225
 226                 if ( $this->mPage->getID() === 0 ) {
 227                         # If this is a MediaWiki:x message, then load the messages
 228                         # and return the message value for x.
 229                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 230                                 $text = $this->getTitle()->getDefaultMessageText();
 231                                 if ( $text === false ) {
 232                                         $text = '';
 233                                 }
 234
 235                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 236                         } else {
 237                                 $content = new MessageContent( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', null, 'parsemag' );
 238                         }
 239                         wfProfileOut( __METHOD__ );
 240
 241                         return $content;
 242                 } else {
 243                         $this->fetchContentObject();
 244                         wfProfileOut( __METHOD__ );
 245
 246                         return $this->mContentObject;
 247                 }
 248         }
 249
 250         /**
 251          * @return int The oldid of the article that is to be shown, 0 for the
 252          *             current revision
 253          */
 254         public function getOldID() {
 255                 if ( is_null( $this->mOldId ) ) {
 256                         $this->mOldId = $this->getOldIDFromRequest();
 257                 }
 258
 259                 return $this->mOldId;
 260         }
 261
 262         /**
 263          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 264          *
 265          * @return int The old id for the request
 266          */
 267         public function getOldIDFromRequest() {
 268                 global $wgRequest;
 269
 270                 $this->mRedirectUrl = false;
 271
 272                 $oldid = $wgRequest->getIntOrNull( 'oldid' );
 273
 274                 if ( $oldid === null ) {
 275                         return 0;
 276                 }
 277
 278                 if ( $oldid !== 0 ) {
 279                         # Load the given revision and check whether the page is another one.
 280                         # In that case, update this instance to reflect the change.
 281                         if ( $oldid === $this->mPage->getLatest() ) {
 282                                 $this->mRevision = $this->mPage->getRevision();
 283                         } else {
 284                                 $this->mRevision = Revision::newFromId( $oldid );
 285                                 if ( $this->mRevision !== null ) {
 286                                         // Revision title doesn't match the page title given?
 287                                         if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 288                                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 289                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 290                                         }
 291                                 }
 292                         }
 293                 }
 294
 295                 if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 296                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 297                         if ( $nextid ) {
 298                                 $oldid = $nextid;
 299                                 $this->mRevision = null;
 300                         } else {
 301                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 302                         }
 303                 } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 304                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 305                         if ( $previd ) {
 306                                 $oldid = $previd;
 307                                 $this->mRevision = null;
 308                         }
 309                 }
 310
 311                 return $oldid;
 312         }
 313
 314         /**
 315          * Load the revision (including text) into this object
 316          *
 317          * @deprecated in 1.19; use fetchContent()
 318          */
 319         function loadContent() {
 320                 wfDeprecated( __METHOD__, '1.19' );
 321                 $this->fetchContent();
 322         }
 323
 324         /**
 325          * Get text of an article from database
 326          * Does *NOT* follow redirects.
 327          *
 328          * @return mixed string containing article contents, or false if null
 329          * @deprecated in 1.20, use getContentObject() instead
 330          */
 331         protected function fetchContent() { #BC cruft!
 332                 wfDeprecated( __METHOD__, '1.20' );
 333
 334                 if ( $this->mContentLoaded && $this->mContent ) {
 335                         return $this->mContent;
 336                 }
 337
 338                 wfProfileIn( __METHOD__ );
 339
 340                 $content = $this->fetchContentObject();
 341
 342                 $this->mContent = ContentHandler::getContentText( $content ); #FIXME: get rid of mContent everywhere!
 343                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ); #BC cruft!
 344
 345                 wfProfileOut( __METHOD__ );
 346
 347                 return $this->mContent;
 348         }
 349
 350
 351         /**
 352          * Get text content object
 353          * Does *NOT* follow redirects.
 354          * TODO: when is this null?
 355          *
 356          * @return Content|null
 357          */
 358         protected function fetchContentObject() {
 359                 if ( $this->mContentLoaded ) {
 360                         return $this->mContentObject;
 361                 }
 362
 363                 wfProfileIn( __METHOD__ );
 364
 365                 $this->mContentLoaded = true;
 366                 $this->mContent = null;
 367
 368                 $oldid = $this->getOldID();
 369
 370                 # Pre-fill content with error message so that if something
 371                 # fails we'll have something telling us what we intended.
 372                 $t = $this->getTitle()->getPrefixedText();
 373                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 374                 $this->mContentObject = new MessageContent( 'missing-article', array($t, $d), array() ) ; // @todo: this isn't page content but a UI message. horrible.
 375
 376                 if ( $oldid ) {
 377                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 378                         if ( !$this->mRevision ) {
 379                                 $this->mRevision = Revision::newFromId( $oldid );
 380                                 if ( !$this->mRevision ) {
 381                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 382                                         wfProfileOut( __METHOD__ );
 383                                         return false;
 384                                 }
 385                         }
 386                 } else {
 387                         if ( !$this->mPage->getLatest() ) {
 388                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 389                                 wfProfileOut( __METHOD__ );
 390                                 return false;
 391                         }
 392
 393                         $this->mRevision = $this->mPage->getRevision();
 394
 395                         if ( !$this->mRevision ) {
 396                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 397                                 wfProfileOut( __METHOD__ );
 398                                 return false;
 399                         }
 400                 }
 401
 402                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 403                 // We should instead work with the Revision object when we need it...
 404                 $this->mContentObject = $this->mRevision->getContent( Revision::FOR_THIS_USER ); // Loads if user is allowed
 405                 $this->mRevIdFetched = $this->mRevision->getId();
 406
 407                 wfRunHooks( 'ArticleAfterFetchContentObject', array( &$this, &$this->mContentObject ) ); #FIXME: register new hook
 408
 409                 wfProfileOut( __METHOD__ );
 410
 411                 return $this->mContentObject;
 412         }
 413
 414         /**
 415          * No-op
 416          * @deprecated since 1.18
 417          */
 418         public function forUpdate() {
 419                 wfDeprecated( __METHOD__, '1.18' );
 420         }
 421
 422         /**
 423          * Returns true if the currently-referenced revision is the current edit
 424          * to this page (and it exists).
 425          * @return bool
 426          */
 427         public function isCurrent() {
 428                 # If no oldid, this is the current version.
 429                 if ( $this->getOldID() == 0 ) {
 430                         return true;
 431                 }
 432
 433                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 434         }
 435
 436         /**
 437          * Get the fetched Revision object depending on request parameters or null
 438          * on failure.
 439          *
 440          * @since 1.19
 441          * @return Revision|null
 442          */
 443         public function getRevisionFetched() {
 444                 $this->fetchContentObject();
 445
 446                 return $this->mRevision;
 447         }
 448
 449         /**
 450          * Use this to fetch the rev ID used on page views
 451          *
 452          * @return int revision ID of last article revision
 453          */
 454         public function getRevIdFetched() {
 455                 if ( $this->mRevIdFetched ) {
 456                         return $this->mRevIdFetched;
 457                 } else {
 458                         return $this->mPage->getLatest();
 459                 }
 460         }
 461
 462         /**
 463          * This is the default action of the index.php entry point: just view the
 464          * page of the given title.
 465          */
 466         public function view() {
 467                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 468                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 469
 470                 wfProfileIn( __METHOD__ );
 471
 472                 # Get variables from query string
 473                 # As side effect this will load the revision and update the title
 474                 # in a revision ID is passed in the request, so this should remain
 475                 # the first call of this method even if $oldid is used way below.
 476                 $oldid = $this->getOldID();
 477
 478                 # Another whitelist check in case getOldID() is altering the title
 479                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $wgUser );
 480                 if ( count( $permErrors ) ) {
 481                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 482                         wfProfileOut( __METHOD__ );
 483                         throw new PermissionsError( 'read', $permErrors );
 484                 }
 485
 486                 # getOldID() may as well want us to redirect somewhere else
 487                 if ( $this->mRedirectUrl ) {
 488                         $wgOut->redirect( $this->mRedirectUrl );
 489                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 490                         wfProfileOut( __METHOD__ );
 491
 492                         return;
 493                 }
 494
 495                 # If we got diff in the query, we want to see a diff page instead of the article.
 496                 if ( $wgRequest->getCheck( 'diff' ) ) {
 497                         wfDebug( __METHOD__ . ": showing diff page\n" );
 498                         $this->showDiffPage();
 499                         wfProfileOut( __METHOD__ );
 500
 501                         return;
 502                 }
 503
 504                 # Set page title (may be overridden by DISPLAYTITLE)
 505                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 506
 507                 $wgOut->setArticleFlag( true );
 508                 # Allow frames by default
 509                 $wgOut->allowClickjacking();
 510
 511                 $parserCache = ParserCache::singleton();
 512
 513                 $parserOptions = $this->getParserOptions();
 514                 # Render printable version, use printable version cache
 515                 if ( $wgOut->isPrintable() ) {
 516                         $parserOptions->setIsPrintable( true );
 517                         $parserOptions->setEditSection( false );
 518                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit' ) ) {
 519                         $parserOptions->setEditSection( false );
 520                 }
 521
 522                 # Try client and file cache
 523                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 524                         if ( $wgUseETag ) {
 525                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 526                         }
 527
 528                         # Is it client cached?
 529                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 530                                 wfDebug( __METHOD__ . ": done 304\n" );
 531                                 wfProfileOut( __METHOD__ );
 532
 533                                 return;
 534                         # Try file cache
 535                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 536                                 wfDebug( __METHOD__ . ": done file cache\n" );
 537                                 # tell wgOut that output is taken care of
 538                                 $wgOut->disable();
 539                                 $this->mPage->doViewUpdates( $wgUser );
 540                                 wfProfileOut( __METHOD__ );
 541
 542                                 return;
 543                         }
 544                 }
 545
 546                 # Should the parser cache be used?
 547                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 548                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 549                 if ( $wgUser->getStubThreshold() ) {
 550                         wfIncrStats( 'pcache_miss_stub' );
 551                 }
 552
 553                 $this->showRedirectedFromHeader();
 554                 $this->showNamespaceHeader();
 555
 556                 # Iterate through the possible ways of constructing the output text.
 557                 # Keep going until $outputDone is set, or we run out of things to do.
 558                 $pass = 0;
 559                 $outputDone = false;
 560                 $this->mParserOutput = false;
 561
 562                 while ( !$outputDone && ++$pass ) {
 563                         switch( $pass ) {
 564                                 case 1:
 565                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 566                                         break;
 567                                 case 2:
 568                                         # Early abort if the page doesn't exist
 569                                         if ( !$this->mPage->exists() ) {
 570                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 571                                                 $this->showMissingArticle();
 572                                                 wfProfileOut( __METHOD__ );
 573                                                 return;
 574                                         }
 575
 576                                         # Try the parser cache
 577                                         if ( $useParserCache ) {
 578                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 579
 580                                                 if ( $this->mParserOutput !== false ) {
 581                                                         if ( $oldid ) {
 582                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 583                                                                 $this->setOldSubtitle( $oldid );
 584                                                         } else {
 585                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 586                                                         }
 587                                                         $wgOut->addParserOutput( $this->mParserOutput );
 588                                                         # Ensure that UI elements requiring revision ID have
 589                                                         # the correct version information.
 590                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 591                                                         # Preload timestamp to avoid a DB hit
 592                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 593                                                         if ( $cachedTimestamp !== null ) {
 594                                                                 $wgOut->setRevisionTimestamp( $cachedTimestamp );
 595                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 596                                                         }
 597                                                         $outputDone = true;
 598                                                 }
 599                                         }
 600                                         break;
 601                                 case 3:
 602                                         # This will set $this->mRevision if needed
 603                                         $this->fetchContentObject();
 604
 605                                         # Are we looking at an old revision
 606                                         if ( $oldid && $this->mRevision ) {
 607                                                 $this->setOldSubtitle( $oldid );
 608
 609                                                 if ( !$this->showDeletedRevisionHeader() ) {
 610                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 611                                                         wfProfileOut( __METHOD__ );
 612                                                         return;
 613                                                 }
 614                                         }
 615
 616                                         # Ensure that UI elements requiring revision ID have
 617                                         # the correct version information.
 618                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 619                                         # Preload timestamp to avoid a DB hit
 620                                         $wgOut->setRevisionTimestamp( $this->getTimestamp() );
 621
 622                                         # Pages containing custom CSS or JavaScript get special treatment
 623                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 624                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 625                                                 $this->showCssOrJsPage();
 626                                                 $outputDone = true;
 627                                         } elseif( !wfRunHooks( 'ArticleContentViewCustom', array( $this->fetchContentObject(), $this->getTitle(), $wgOut ) ) ) { #FIXME: document new hook!
 628                                                 # Allow extensions do their own custom view for certain pages
 629                                                 $outputDone = true;
 630                                         } elseif( Hooks::isRegistered( 'ArticleViewCustom' ) && !wfRunHooks( 'ArticleViewCustom', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated! #FIXME: deprecate hook!
 631                                                 # Allow extensions do their own custom view for certain pages
 632                                                 $outputDone = true;
 633                                         } else {
 634                                                 $content = $this->getContentObject();
 635                                                 $rt = $content->getRedirectChain();
 636                                                 if ( $rt ) {
 637                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 638                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 639                                                         $wgOut->addHTML( $this->viewRedirect( $rt ) );
 640                                                         # Parse just to get categories, displaytitle, etc.
 641                                                         $this->mParserOutput = $content->getParserOutput( $this->getContext(), $oldid, $parserOptions, false );
 642                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 643                                                         $outputDone = true;
 644                                                 }
 645                                         }
 646                                         break;
 647                                 case 4:
 648                                         # Run the parse, protected by a pool counter
 649                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 650
 651                                         // @todo: shouldn't we be passing $this->getPage() to PoolWorkArticleView instead of plain $this?
 652                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 653                                                 $this->getRevIdFetched(), $useParserCache, $this->getContentObject(), $this->getContext() );
 654
 655                                         if ( !$poolArticleView->execute() ) {
 656                                                 $error = $poolArticleView->getError();
 657                                                 if ( $error ) {
 658                                                         $wgOut->clearHTML(); // for release() errors
 659                                                         $wgOut->enableClientCache( false );
 660                                                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 661
 662                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 663                                                         $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 664                                                 }
 665                                                 # Connection or timeout error
 666                                                 wfProfileOut( __METHOD__ );
 667                                                 return;
 668                                         }
 669
 670                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 671                                         $wgOut->addParserOutput( $this->mParserOutput );
 672
 673                                         # Don't cache a dirty ParserOutput object
 674                                         if ( $poolArticleView->getIsDirty() ) {
 675                                                 $wgOut->setSquidMaxage( 0 );
 676                                                 $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 677                                         }
 678
 679                                         $outputDone = true;
 680                                         break;
 681                                 # Should be unreachable, but just in case...
 682                                 default:
 683                                         break 2;
 684                         }
 685                 }
 686
 687                 # Get the ParserOutput actually *displayed* here.
 688                 # Note that $this->mParserOutput is the *current* version output.
 689                 $pOutput = ( $outputDone instanceof ParserOutput )
 690                         ? $outputDone // object fetched by hook
 691                         : $this->mParserOutput;
 692
 693                 # Adjust title for main page & pages with displaytitle
 694                 if ( $pOutput ) {
 695                         $this->adjustDisplayTitle( $pOutput );
 696                 }
 697
 698                 # For the main page, overwrite the <title> element with the con-
 699                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 700                 # that's not empty).
 701                 # This message always exists because it is in the i18n files
 702                 if ( $this->getTitle()->isMainPage() ) {
 703                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 704                         if ( !$msg->isDisabled() ) {
 705                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 706                         }
 707                 }
 708
 709                 # Check for any __NOINDEX__ tags on the page using $pOutput
 710                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 711                 $wgOut->setIndexPolicy( $policy['index'] );
 712                 $wgOut->setFollowPolicy( $policy['follow'] );
 713
 714                 $this->showViewFooter();
 715                 $this->mPage->doViewUpdates( $wgUser );
 716
 717                 wfProfileOut( __METHOD__ );
 718         }
 719
 720         /**
 721          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 722          * @param $pOutput ParserOutput
 723          */
 724         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 725                 global $wgOut;
 726                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 727                 $titleText = $pOutput->getTitleText();
 728                 if ( strval( $titleText ) !== '' ) {
 729                         $wgOut->setPageTitle( $titleText );
 730                 }
 731         }
 732
 733         /**
 734          * Show a diff page according to current request variables. For use within
 735          * Article::view() only, other callers should use the DifferenceEngine class.
 736          */
 737         public function showDiffPage() {
 738                 global $wgRequest, $wgUser;
 739
 740                 $diff = $wgRequest->getVal( 'diff' );
 741                 $rcid = $wgRequest->getVal( 'rcid' );
 742                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 743                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 744                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 745                 $oldid = $this->getOldID();
 746
 747                 $contentHandler = ContentHandler::getForTitle( $this->getTitle() );
 748                 $de = $contentHandler->createDifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 749
 750                 // DifferenceEngine directly fetched the revision:
 751                 $this->mRevIdFetched = $de->mNewid;
 752                 $de->showDiffPage( $diffOnly );
 753
 754                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 755                         # Run view updates for current revision only
 756                         $this->mPage->doViewUpdates( $wgUser );
 757                 }
 758         }
 759
 760         /**
 761          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 762          * Article::view() only.
 763          *
 764          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 765          * page views.
 766          */
 767         protected function showCssOrJsPage( $showCacheHint = true ) {
 768                 global $wgOut;
 769
 770                 if ( $showCacheHint ) {
 771                         $dir = $this->getContext()->getLanguage()->getDir();
 772                         $lang = $this->getContext()->getLanguage()->getCode();
 773
 774                         $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 775                                 'clearyourcache' );
 776                 }
 777
 778                 // Give hooks a chance to customise the output
 779                 if ( !Hooks::isRegistered('ShowRawCssJs') || wfRunHooks( 'ShowRawCssJs', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated #FIXME: hook is deprecated
 780                         $po = $this->mContentObject->getParserOutput( $this->getContext() );
 781                         $wgOut->addHTML( $po->getText() );
 782                 }
 783         }
 784
 785         /**
 786          * Get the robot policy to be used for the current view
 787          * @param $action String the action= GET parameter
 788          * @param $pOutput ParserOutput
 789          * @return Array the policy that should be set
 790          * TODO: actions other than 'view'
 791          */
 792         public function getRobotPolicy( $action, $pOutput ) {
 793                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 794                 global $wgDefaultRobotPolicy, $wgRequest;
 795
 796                 $ns = $this->getTitle()->getNamespace();
 797
 798                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 799                         # Don't index user and user talk pages for blocked users (bug 11443)
 800                         if ( !$this->getTitle()->isSubpage() ) {
 801                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 802                                         return array(
 803                                                 'index'  => 'noindex',
 804                                                 'follow' => 'nofollow'
 805                                         );
 806                                 }
 807                         }
 808                 }
 809
 810                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 811                         # Non-articles (special pages etc), and old revisions
 812                         return array(
 813                                 'index'  => 'noindex',
 814                                 'follow' => 'nofollow'
 815                         );
 816                 } elseif ( $wgOut->isPrintable() ) {
 817                         # Discourage indexing of printable versions, but encourage following
 818                         return array(
 819                                 'index'  => 'noindex',
 820                                 'follow' => 'follow'
 821                         );
 822                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 823                         # For ?curid=x urls, disallow indexing
 824                         return array(
 825                                 'index'  => 'noindex',
 826                                 'follow' => 'follow'
 827                         );
 828                 }
 829
 830                 # Otherwise, construct the policy based on the various config variables.
 831                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 832
 833                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 834                         # Honour customised robot policies for this namespace
 835                         $policy = array_merge(
 836                                 $policy,
 837                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 838                         );
 839                 }
 840                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 841                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 842                         # a final sanity check that we have really got the parser output.
 843                         $policy = array_merge(
 844                                 $policy,
 845                                 array( 'index' => $pOutput->getIndexPolicy() )
 846                         );
 847                 }
 848
 849                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 850                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 851                         $policy = array_merge(
 852                                 $policy,
 853                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 854                         );
 855                 }
 856
 857                 return $policy;
 858         }
 859
 860         /**
 861          * Converts a String robot policy into an associative array, to allow
 862          * merging of several policies using array_merge().
 863          * @param $policy Mixed, returns empty array on null/false/'', transparent
 864          *            to already-converted arrays, converts String.
 865          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 866          */
 867         public static function formatRobotPolicy( $policy ) {
 868                 if ( is_array( $policy ) ) {
 869                         return $policy;
 870                 } elseif ( !$policy ) {
 871                         return array();
 872                 }
 873
 874                 $policy = explode( ',', $policy );
 875                 $policy = array_map( 'trim', $policy );
 876
 877                 $arr = array();
 878                 foreach ( $policy as $var ) {
 879                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 880                                 $arr['index'] = $var;
 881                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 882                                 $arr['follow'] = $var;
 883                         }
 884                 }
 885
 886                 return $arr;
 887         }
 888
 889         /**
 890          * If this request is a redirect view, send "redirected from" subtitle to
 891          * $wgOut. Returns true if the header was needed, false if this is not a
 892          * redirect view. Handles both local and remote redirects.
 893          *
 894          * @return boolean
 895          */
 896         public function showRedirectedFromHeader() {
 897                 global $wgOut, $wgRequest, $wgRedirectSources;
 898
 899                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 900
 901                 if ( isset( $this->mRedirectedFrom ) ) {
 902                         // This is an internally redirected page view.
 903                         // We'll need a backlink to the source page for navigation.
 904                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 905                                 $redir = Linker::linkKnown(
 906                                         $this->mRedirectedFrom,
 907                                         null,
 908                                         array(),
 909                                         array( 'redirect' => 'no' )
 910                                 );
 911
 912                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 913
 914                                 // Set the fragment if one was specified in the redirect
 915                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 916                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 917                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 918                                 }
 919
 920                                 // Add a <link rel="canonical"> tag
 921                                 $wgOut->addLink( array( 'rel' => 'canonical',
 922                                         'href' => $this->getTitle()->getLocalURL() )
 923                                 );
 924
 925                                 // Tell $wgOut the user arrived at this article through a redirect
 926                                 $wgOut->setRedirectedFrom( $this->mRedirectedFrom );
 927
 928                                 return true;
 929                         }
 930                 } elseif ( $rdfrom ) {
 931                         // This is an externally redirected view, from some other wiki.
 932                         // If it was reported from a trusted site, supply a backlink.
 933                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 934                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 935                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 936
 937                                 return true;
 938                         }
 939                 }
 940
 941                 return false;
 942         }
 943
 944         /**
 945          * Show a header specific to the namespace currently being viewed, like
 946          * [[MediaWiki:Talkpagetext]]. For Article::view().
 947          */
 948         public function showNamespaceHeader() {
 949                 global $wgOut;
 950
 951                 if ( $this->getTitle()->isTalkPage() ) {
 952                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 953                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 954                         }
 955                 }
 956         }
 957
 958         /**
 959          * Show the footer section of an ordinary page view
 960          */
 961         public function showViewFooter() {
 962                 global $wgOut;
 963
 964                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 965                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 966                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 967                 }
 968
 969                 # If we have been passed an &rcid= parameter, we want to give the user a
 970                 # chance to mark this new article as patrolled.
 971                 $this->showPatrolFooter();
 972
 973                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 974
 975         }
 976
 977         /**
 978          * If patrol is possible, output a patrol UI box. This is called from the
 979          * footer section of ordinary page views. If patrol is not possible or not
 980          * desired, does nothing.
 981          */
 982         public function showPatrolFooter() {
 983                 global $wgOut, $wgRequest, $wgUser;
 984
 985                 $rcid = $wgRequest->getVal( 'rcid' );
 986
 987                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 988                         return;
 989                 }
 990
 991                 $token = $wgUser->getEditToken( $rcid );
 992                 $wgOut->preventClickjacking();
 993
 994                 $wgOut->addHTML(
 995                         "<div class='patrollink'>" .
 996                                 wfMsgHtml(
 997                                         'markaspatrolledlink',
 998                                         Linker::link(
 999                                                 $this->getTitle(),
1000                                                 wfMsgHtml( 'markaspatrolledtext' ),
1001                                                 array(),
1002                                                 array(
1003                                                         'action' => 'markpatrolled',
1004                                                         'rcid' => $rcid,
1005                                                         'token' => $token,
1006                                                 ),
1007                                                 array( 'known', 'noclasses' )
1008                                         )
1009                                 ) .
1010                         '</div>'
1011                 );
1012         }
1013
1014         /**
1015          * Show the error text for a missing article. For articles in the MediaWiki
1016          * namespace, show the default message text. To be called from Article::view().
1017          */
1018         public function showMissingArticle() {
1019                 global $wgOut, $wgRequest, $wgUser, $wgSend404Code;
1020
1021                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1022                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
1023                         $parts = explode( '/', $this->getTitle()->getText() );
1024                         $rootPart = $parts[0];
1025                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1026                         $ip = User::isIP( $rootPart );
1027
1028                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1029                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1030                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1031                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1032                                 LogEventsList::showLogExtract(
1033                                         $wgOut,
1034                                         'block',
1035                                         $user->getUserPage()->getPrefixedText(),
1036                                         '',
1037                                         array(
1038                                                 'lim' => 1,
1039                                                 'showIfEmpty' => false,
1040                                                 'msgKey' => array(
1041                                                         'blocked-notice-logextract',
1042                                                         $user->getName() # Support GENDER in notice
1043                                                 )
1044                                         )
1045                                 );
1046                         }
1047                 }
1048
1049                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1050
1051                 # Show delete and move logs
1052                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
1053                         array(  'lim' => 10,
1054                                 'conds' => array( "log_action != 'revision'" ),
1055                                 'showIfEmpty' => false,
1056                                 'msgKey' => array( 'moveddeleted-notice' ) )
1057                 );
1058
1059                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1060                         // If there's no backing content, send a 404 Not Found
1061                         // for better machine handling of broken links.
1062                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
1063                 }
1064
1065                 $hookResult = wfRunHooks( 'BeforeDisplayNoArticleText', array( $this ) );
1066
1067                 if ( ! $hookResult ) {
1068                         return;
1069                 }
1070
1071                 # Show error message
1072                 $oldid = $this->getOldID();
1073                 if ( $oldid ) {
1074                         $text = wfMsgNoTrans( 'missing-article',
1075                                 $this->getTitle()->getPrefixedText(),
1076                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
1077                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1078                         // Use the default message text
1079                         $text = $this->getTitle()->getDefaultMessageText();
1080                 } else {
1081                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
1082                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
1083                         $errors = array_merge( $createErrors, $editErrors );
1084
1085                         if ( !count( $errors ) ) {
1086                                 $text = wfMsgNoTrans( 'noarticletext' );
1087                         } else {
1088                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1089                         }
1090                 }
1091                 $text = "<div class='noarticletext'>\n$text\n</div>";
1092
1093                 $wgOut->addWikiText( $text );
1094         }
1095
1096         /**
1097          * If the revision requested for view is deleted, check permissions.
1098          * Send either an error message or a warning header to $wgOut.
1099          *
1100          * @return boolean true if the view is allowed, false if not.
1101          */
1102         public function showDeletedRevisionHeader() {
1103                 global $wgOut, $wgRequest;
1104
1105                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1106                         // Not deleted
1107                         return true;
1108                 }
1109
1110                 // If the user is not allowed to see it...
1111                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1112                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1113                                 'rev-deleted-text-permission' );
1114
1115                         return false;
1116                 // If the user needs to confirm that they want to see it...
1117                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1118                         # Give explanation and add a link to view the revision...
1119                         $oldid = intval( $this->getOldID() );
1120                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1121                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1122                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1123                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1124                                 array( $msg, $link ) );
1125
1126                         return false;
1127                 // We are allowed to see...
1128                 } else {
1129                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1130                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1131                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1132
1133                         return true;
1134                 }
1135         }
1136
1137         /**
1138          * Generate the navigation links when browsing through an article revisions
1139          * It shows the information as:
1140          *   Revision as of \<date\>; view current revision
1141          *   \<- Previous version | Next Version -\>
1142          *
1143          * @param $oldid String: revision ID of this article revision
1144          */
1145         public function setOldSubtitle( $oldid = 0 ) {
1146                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1147
1148                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1149                         return;
1150                 }
1151
1152                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1153
1154                 # Cascade unhide param in links for easy deletion browsing
1155                 $extraParams = array();
1156                 if ( $unhide ) {
1157                         $extraParams['unhide'] = 1;
1158                 }
1159
1160                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1161                         $revision = $this->mRevision;
1162                 } else {
1163                         $revision = Revision::newFromId( $oldid );
1164                 }
1165
1166                 $timestamp = $revision->getTimestamp();
1167
1168                 $current = ( $oldid == $this->mPage->getLatest() );
1169                 $td = $wgLang->timeanddate( $timestamp, true );
1170                 $tddate = $wgLang->date( $timestamp, true );
1171                 $tdtime = $wgLang->time( $timestamp, true );
1172
1173                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1174                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1175
1176                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1177                         ? 'revision-info-current'
1178                         : 'revision-info';
1179
1180                 $wgOut->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1181                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1182                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1183
1184                 $lnk = $current
1185                         ? wfMsgHtml( 'currentrevisionlink' )
1186                         : Linker::link(
1187                                 $this->getTitle(),
1188                                 wfMsgHtml( 'currentrevisionlink' ),
1189                                 array(),
1190                                 $extraParams,
1191                                 array( 'known', 'noclasses' )
1192                         );
1193                 $curdiff = $current
1194                         ? wfMsgHtml( 'diff' )
1195                         : Linker::link(
1196                                 $this->getTitle(),
1197                                 wfMsgHtml( 'diff' ),
1198                                 array(),
1199                                 array(
1200                                         'diff' => 'cur',
1201                                         'oldid' => $oldid
1202                                 ) + $extraParams,
1203                                 array( 'known', 'noclasses' )
1204                         );
1205                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1206                 $prevlink = $prev
1207                         ? Linker::link(
1208                                 $this->getTitle(),
1209                                 wfMsgHtml( 'previousrevision' ),
1210                                 array(),
1211                                 array(
1212                                         'direction' => 'prev',
1213                                         'oldid' => $oldid
1214                                 ) + $extraParams,
1215                                 array( 'known', 'noclasses' )
1216                         )
1217                         : wfMsgHtml( 'previousrevision' );
1218                 $prevdiff = $prev
1219                         ? Linker::link(
1220                                 $this->getTitle(),
1221                                 wfMsgHtml( 'diff' ),
1222                                 array(),
1223                                 array(
1224                                         'diff' => 'prev',
1225                                         'oldid' => $oldid
1226                                 ) + $extraParams,
1227                                 array( 'known', 'noclasses' )
1228                         )
1229                         : wfMsgHtml( 'diff' );
1230                 $nextlink = $current
1231                         ? wfMsgHtml( 'nextrevision' )
1232                         : Linker::link(
1233                                 $this->getTitle(),
1234                                 wfMsgHtml( 'nextrevision' ),
1235                                 array(),
1236                                 array(
1237                                         'direction' => 'next',
1238                                         'oldid' => $oldid
1239                                 ) + $extraParams,
1240                                 array( 'known', 'noclasses' )
1241                         );
1242                 $nextdiff = $current
1243                         ? wfMsgHtml( 'diff' )
1244                         : Linker::link(
1245                                 $this->getTitle(),
1246                                 wfMsgHtml( 'diff' ),
1247                                 array(),
1248                                 array(
1249                                         'diff' => 'next',
1250                                         'oldid' => $oldid
1251                                 ) + $extraParams,
1252                                 array( 'known', 'noclasses' )
1253                         );
1254
1255                 $cdel = Linker::getRevDeleteLink( $wgUser, $revision, $this->getTitle() );
1256                 if ( $cdel !== '' ) {
1257                         $cdel .= ' ';
1258                 }
1259
1260                 $wgOut->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1261                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1262                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1263         }
1264
1265         /**
1266          * View redirect
1267          *
1268          * @param $target Title|Array of destination(s) to redirect
1269          * @param $appendSubtitle Boolean [optional]
1270          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1271          * @return string containing HMTL with redirect link
1272          */
1273         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1274                 global $wgOut, $wgStylePath;
1275
1276                 if ( !is_array( $target ) ) {
1277                         $target = array( $target );
1278                 }
1279
1280                 $lang = $this->getTitle()->getPageLanguage();
1281                 $imageDir = $lang->getDir();
1282
1283                 if ( $appendSubtitle ) {
1284                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1285                 }
1286
1287                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1288
1289                 /**
1290                  * @var $title Title
1291                  */
1292                 $title = array_shift( $target );
1293
1294                 if ( $forceKnown ) {
1295                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1296                 } else {
1297                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1298                 }
1299
1300                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1301                 $alt = $lang->isRTL() ? '←' : '→';
1302                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1303                 foreach ( $target as $rt ) {
1304                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1305                         if ( $forceKnown ) {
1306                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1307                         } else {
1308                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1309                         }
1310                 }
1311
1312                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1313                 return '<div class="redirectMsg">' .
1314                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1315                         '<span class="redirectText">' . $link . '</span></div>';
1316         }
1317
1318         /**
1319          * Handle action=render
1320          */
1321         public function render() {
1322                 global $wgOut;
1323
1324                 $wgOut->setArticleBodyOnly( true );
1325                 $this->view();
1326         }
1327
1328         /**
1329          * action=protect handler
1330          */
1331         public function protect() {
1332                 $form = new ProtectionForm( $this );
1333                 $form->execute();
1334         }
1335
1336         /**
1337          * action=unprotect handler (alias)
1338          */
1339         public function unprotect() {
1340                 $this->protect();
1341         }
1342
1343         /**
1344          * UI entry point for page deletion
1345          */
1346         public function delete() {
1347                 global $wgOut, $wgRequest, $wgLang;
1348
1349                 # This code desperately needs to be totally rewritten
1350
1351                 $title = $this->getTitle();
1352                 $user = $this->getContext()->getUser();
1353
1354                 # Check permissions
1355                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1356                 if ( count( $permission_errors ) ) {
1357                         throw new PermissionsError( 'delete', $permission_errors );
1358                 }
1359
1360                 # Read-only check...
1361                 if ( wfReadOnly() ) {
1362                         throw new ReadOnlyError;
1363                 }
1364
1365                 # Better double-check that it hasn't been deleted yet!
1366                 $dbw = wfGetDB( DB_MASTER );
1367                 $conds = $title->pageCond();
1368                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1369                 if ( $latest === false ) {
1370                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1371                         $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1372                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1373                                 );
1374                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1375                         LogEventsList::showLogExtract(
1376                                 $wgOut,
1377                                 'delete',
1378                                 $title->getPrefixedText()
1379                         );
1380
1381                         return;
1382                 }
1383
1384                 $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1385                 $deleteReason = $wgRequest->getText( 'wpReason' );
1386
1387                 if ( $deleteReasonList == 'other' ) {
1388                         $reason = $deleteReason;
1389                 } elseif ( $deleteReason != '' ) {
1390                         // Entry from drop down menu + additional comment
1391                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1392                 } else {
1393                         $reason = $deleteReasonList;
1394                 }
1395
1396                 if ( $wgRequest->wasPosted() && $user->matchEditToken( $wgRequest->getVal( 'wpEditToken' ),
1397                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1398                 {
1399                         # Flag to hide all contents of the archived revisions
1400                         $suppress = $wgRequest->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1401
1402                         $this->doDelete( $reason, $suppress );
1403
1404                         if ( $wgRequest->getCheck( 'wpWatch' ) && $user->isLoggedIn() ) {
1405                                 $this->doWatch();
1406                         } elseif ( $title->userIsWatching() ) {
1407                                 $this->doUnwatch();
1408                         }
1409
1410                         return;
1411                 }
1412
1413                 // Generate deletion reason
1414                 $hasHistory = false;
1415                 if ( !$reason ) {
1416                         try {
1417                                 $reason = $this->generateReason( $hasHistory );
1418                         } catch (MWException $e) {
1419                                 # if a page is horribly broken, we still want to be able to delete it. so be lenient about errors here.
1420                                 wfDebug("Error while building auto delete summary: $e");
1421                                 $reason = '';
1422                         }
1423                 }
1424
1425                 // If the page has a history, insert a warning
1426                 if ( $hasHistory ) {
1427                         $revisions = $this->mTitle->estimateRevisionCount();
1428                         // @todo FIXME: i18n issue/patchwork message
1429                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1430                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1431                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1432                                         wfMsgHtml( 'history' ),
1433                                         array( 'rel' => 'archives' ),
1434                                         array( 'action' => 'history' ) ) .
1435                                 '</strong>'
1436                         );
1437
1438                         if ( $this->mTitle->isBigDeletion() ) {
1439                                 global $wgDeleteRevisionsLimit;
1440                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1441                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1442                         }
1443                 }
1444
1445                 return $this->confirmDelete( $reason );
1446         }
1447
1448         /**
1449          * Output deletion confirmation dialog
1450          * @todo FIXME: Move to another file?
1451          * @param $reason String: prefilled reason
1452          */
1453         public function confirmDelete( $reason ) {
1454                 global $wgOut;
1455
1456                 wfDebug( "Article::confirmDelete\n" );
1457
1458                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1459                 $wgOut->addBacklinkSubtitle( $this->getTitle() );
1460                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1461                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1462
1463                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1464
1465                 $user = $this->getContext()->getUser();
1466
1467                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1468                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1469                                         <td></td>
1470                                         <td class='mw-input'><strong>" .
1471                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1472                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1473                                         "</strong></td>
1474                                 </tr>";
1475                 } else {
1476                         $suppress = '';
1477                 }
1478                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1479
1480                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1481                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1482                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1483                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1484                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1485                         "<tr id=\"wpDeleteReasonListRow\">
1486                                 <td class='mw-label'>" .
1487                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1488                                 "</td>
1489                                 <td class='mw-input'>" .
1490                                         Xml::listDropDown( 'wpDeleteReasonList',
1491                                                 wfMsgForContent( 'deletereason-dropdown' ),
1492                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1493                                 "</td>
1494                         </tr>
1495                         <tr id=\"wpDeleteReasonRow\">
1496                                 <td class='mw-label'>" .
1497                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1498                                 "</td>
1499                                 <td class='mw-input'>" .
1500                                 Html::input( 'wpReason', $reason, 'text', array(
1501                                         'size' => '60',
1502                                         'maxlength' => '255',
1503                                         'tabindex' => '2',
1504                                         'id' => 'wpReason',
1505                                         'autofocus'
1506                                 ) ) .
1507                                 "</td>
1508                         </tr>";
1509
1510                 # Disallow watching if user is not logged in
1511                 if ( $user->isLoggedIn() ) {
1512                         $form .= "
1513                         <tr>
1514                                 <td></td>
1515                                 <td class='mw-input'>" .
1516                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1517                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1518                                 "</td>
1519                         </tr>";
1520                 }
1521
1522                 $form .= "
1523                         $suppress
1524                         <tr>
1525                                 <td></td>
1526                                 <td class='mw-submit'>" .
1527                                         Xml::submitButton( wfMsg( 'deletepage' ),
1528                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1529                                 "</td>
1530                         </tr>" .
1531                         Xml::closeElement( 'table' ) .
1532                         Xml::closeElement( 'fieldset' ) .
1533                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1534                         Xml::closeElement( 'form' );
1535
1536                         if ( $user->isAllowed( 'editinterface' ) ) {
1537                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1538                                 $link = Linker::link(
1539                                         $title,
1540                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1541                                         array(),
1542                                         array( 'action' => 'edit' )
1543                                 );
1544                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1545                         }
1546
1547                 $wgOut->addHTML( $form );
1548                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1549                 LogEventsList::showLogExtract( $wgOut, 'delete',
1550                         $this->getTitle()->getPrefixedText()
1551                 );
1552         }
1553
1554         /**
1555          * Perform a deletion and output success or failure messages
1556          * @param $reason
1557          * @param $suppress bool
1558          */
1559         public function doDelete( $reason, $suppress = false ) {
1560                 global $wgOut;
1561
1562                 $error = '';
1563                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, 0, true, $error ) ) {
1564                         $deleted = $this->getTitle()->getPrefixedText();
1565
1566                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1567                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1568
1569                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1570
1571                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1572                         $wgOut->returnToMain( false );
1573                 } else {
1574                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1575                         if ( $error == '' ) {
1576                                 $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1577                                         array( 'cannotdelete', wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1578                                 );
1579                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1580
1581                                 LogEventsList::showLogExtract(
1582                                         $wgOut,
1583                                         'delete',
1584                                         $this->getTitle()->getPrefixedText()
1585                                 );
1586                         } else {
1587                                 $wgOut->addHTML( $error );
1588                         }
1589                 }
1590         }
1591
1592         /* Caching functions */
1593
1594         /**
1595          * checkLastModified returns true if it has taken care of all
1596          * output to the client that is necessary for this request.
1597          * (that is, it has sent a cached version of the page)
1598          *
1599          * @return boolean true if cached version send, false otherwise
1600          */
1601         protected function tryFileCache() {
1602                 static $called = false;
1603
1604                 if ( $called ) {
1605                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1606                         return false;
1607                 }
1608
1609                 $called = true;
1610                 if ( $this->isFileCacheable() ) {
1611                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1612                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1613                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1614                                 $cache->loadFromFileCache( $this->getContext() );
1615                                 return true;
1616                         } else {
1617                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1618                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1619                         }
1620                 } else {
1621                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1622                 }
1623
1624                 return false;
1625         }
1626
1627         /**
1628          * Check if the page can be cached
1629          * @return bool
1630          */
1631         public function isFileCacheable() {
1632                 $cacheable = false;
1633
1634                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1635                         $cacheable = $this->mPage->getID()
1636                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1637                         // Extension may have reason to disable file caching on some pages.
1638                         if ( $cacheable ) {
1639                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1640                         }
1641                 }
1642
1643                 return $cacheable;
1644         }
1645
1646         /**#@-*/
1647
1648         /**
1649          * Lightweight method to get the parser output for a page, checking the parser cache
1650          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1651          * consider, so it's not appropriate to use there.
1652          *
1653          * @since 1.16 (r52326) for LiquidThreads
1654          *
1655          * @param $oldid mixed integer Revision ID or null
1656          * @param $user User The relevant user
1657          * @return ParserOutput or false if the given revsion ID is not found
1658          */
1659         public function getParserOutput( $oldid = null, User $user = null ) {
1660                 global $wgUser;
1661
1662                 $user = is_null( $user ) ? $wgUser : $user;
1663                 $parserOptions = $this->mPage->makeParserOptions( $user );
1664
1665                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1666         }
1667
1668         /**
1669          * Get parser options suitable for rendering the primary article wikitext
1670          * @return ParserOptions
1671          */
1672         public function getParserOptions() {
1673                 global $wgUser;
1674                 if ( !$this->mParserOptions ) {
1675                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1676                 }
1677                 // Clone to allow modifications of the return value without affecting cache
1678                 return clone $this->mParserOptions;
1679         }
1680
1681         /**
1682          * Sets the context this Article is executed in
1683          *
1684          * @param $context IContextSource
1685          * @since 1.18
1686          */
1687         public function setContext( $context ) {
1688                 $this->mContext = $context;
1689         }
1690
1691         /**
1692          * Gets the context this Article is executed in
1693          *
1694          * @return IContextSource
1695          * @since 1.18
1696          */
1697         public function getContext() {
1698                 if ( $this->mContext instanceof IContextSource ) {
1699                         return $this->mContext;
1700                 } else {
1701                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1702                         return RequestContext::getMain();
1703                 }
1704         }
1705
1706         /**
1707          * Info about this page
1708          * @deprecated since 1.19
1709          */
1710         public function info() {
1711                 wfDeprecated( __METHOD__, '1.19' );
1712                 Action::factory( 'info', $this )->show();
1713         }
1714
1715         /**
1716          * Mark this particular edit/page as patrolled
1717          * @deprecated since 1.18
1718          */
1719         public function markpatrolled() {
1720                 wfDeprecated( __METHOD__, '1.18' );
1721                 Action::factory( 'markpatrolled', $this )->show();
1722         }
1723
1724         /**
1725          * Handle action=purge
1726          * @deprecated since 1.19
1727          */
1728         public function purge() {
1729                 return Action::factory( 'purge', $this )->show();
1730         }
1731
1732         /**
1733          * Handle action=revert
1734          * @deprecated since 1.19
1735          */
1736         public function revert() {
1737                 wfDeprecated( __METHOD__, '1.19' );
1738                 Action::factory( 'revert', $this )->show();
1739         }
1740
1741         /**
1742          * Handle action=rollback
1743          * @deprecated since 1.19
1744          */
1745         public function rollback() {
1746                 wfDeprecated( __METHOD__, '1.19' );
1747                 Action::factory( 'rollback', $this )->show();
1748         }
1749
1750         /**
1751          * User-interface handler for the "watch" action.
1752          * Requires Request to pass a token as of 1.18.
1753          * @deprecated since 1.18
1754          */
1755         public function watch() {
1756                 wfDeprecated( __METHOD__, '1.18' );
1757                 Action::factory( 'watch', $this )->show();
1758         }
1759
1760         /**
1761          * Add this page to $wgUser's watchlist
1762          *
1763          * This is safe to be called multiple times
1764          *
1765          * @return bool true on successful watch operation
1766          * @deprecated since 1.18
1767          */
1768         public function doWatch() {
1769                 global $wgUser;
1770                 wfDeprecated( __METHOD__, '1.18' );
1771                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1772         }
1773
1774         /**
1775          * User interface handler for the "unwatch" action.
1776          * Requires Request to pass a token as of 1.18.
1777          * @deprecated since 1.18
1778          */
1779         public function unwatch() {
1780                 wfDeprecated( __METHOD__, '1.18' );
1781                 Action::factory( 'unwatch', $this )->show();
1782         }
1783
1784         /**
1785          * Stop watching a page
1786          * @return bool true on successful unwatch
1787          * @deprecated since 1.18
1788          */
1789         public function doUnwatch() {
1790                 global $wgUser;
1791                 wfDeprecated( __METHOD__, '1.18' );
1792                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1793         }
1794
1795         /**
1796          * Output a redirect back to the article.
1797          * This is typically used after an edit.
1798          *
1799          * @deprecated in 1.18; call $wgOut->redirect() directly
1800          * @param $noRedir Boolean: add redirect=no
1801          * @param $sectionAnchor String: section to redirect to, including "#"
1802          * @param $extraQuery String: extra query params
1803          */
1804         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1805                 wfDeprecated( __METHOD__, '1.18' );
1806                 global $wgOut;
1807
1808                 if ( $noRedir ) {
1809                         $query = 'redirect=no';
1810                         if ( $extraQuery )
1811                                 $query .= "&$extraQuery";
1812                 } else {
1813                         $query = $extraQuery;
1814                 }
1815
1816                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1817         }
1818
1819         /**
1820          * Use PHP's magic __get handler to handle accessing of
1821          * raw WikiPage fields for backwards compatibility.
1822          *
1823          * @param $fname String Field name
1824          */
1825         public function __get( $fname ) {
1826                 if ( property_exists( $this->mPage, $fname ) ) {
1827                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1828                         return $this->mPage->$fname;
1829                 }
1830                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1831         }
1832
1833         /**
1834          * Use PHP's magic __set handler to handle setting of
1835          * raw WikiPage fields for backwards compatibility.
1836          *
1837          * @param $fname String Field name
1838          * @param $fvalue mixed New value
1839          */
1840         public function __set( $fname, $fvalue ) {
1841                 if ( property_exists( $this->mPage, $fname ) ) {
1842                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1843                         $this->mPage->$fname = $fvalue;
1844                 // Note: extensions may want to toss on new fields
1845                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1846                         $this->mPage->$fname = $fvalue;
1847                 } else {
1848                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1849                 }
1850         }
1851
1852         /**
1853          * Use PHP's magic __call handler to transform instance calls to
1854          * WikiPage functions for backwards compatibility.
1855          *
1856          * @param $fname String Name of called method
1857          * @param $args Array Arguments to the method
1858          * @return mixed
1859          */
1860         public function __call( $fname, $args ) {
1861                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1862                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1863                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1864                 }
1865                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1866         }
1867
1868         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1869
1870         /**
1871          * @param $limit array
1872          * @param $expiry array
1873          * @param $cascade bool
1874          * @param $reason string
1875          * @param $user User
1876          * @return Status
1877          */
1878         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1879                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1880         }
1881
1882         /**
1883          * @param $limit array
1884          * @param $reason string
1885          * @param $cascade int
1886          * @param $expiry array
1887          * @return bool
1888          */
1889         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1890                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1891         }
1892
1893         /**
1894          * @param $reason string
1895          * @param $suppress bool
1896          * @param $id int
1897          * @param $commit bool
1898          * @param $error string
1899          * @return bool
1900          */
1901         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1902                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1903         }
1904
1905         /**
1906          * @param $fromP
1907          * @param $summary
1908          * @param $token
1909          * @param $bot
1910          * @param $resultDetails
1911          * @param $user User
1912          * @return array
1913          */
1914         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1915                 global $wgUser;
1916                 $user = is_null( $user ) ? $wgUser : $user;
1917                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1918         }
1919
1920         /**
1921          * @param $fromP
1922          * @param $summary
1923          * @param $bot
1924          * @param $resultDetails
1925          * @param $guser User
1926          * @return array
1927          */
1928         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1929                 global $wgUser;
1930                 $guser = is_null( $guser ) ? $wgUser : $guser;
1931                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1932         }
1933
1934         /**
1935          * @param $hasHistory bool
1936          * @return mixed
1937          */
1938         public function generateReason( &$hasHistory ) {
1939                 $title = $this->mPage->getTitle();
1940                 $handler = ContentHandler::getForTitle( $title );
1941                 return $handler->getAutoDeleteReason( $title, $hasHistory );
1942         }
1943
1944         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1945
1946         /**
1947          * @return array
1948          */
1949         public static function selectFields() {
1950                 return WikiPage::selectFields();
1951         }
1952
1953         /**
1954          * @param $title Title
1955          */
1956         public static function onArticleCreate( $title ) {
1957                 WikiPage::onArticleCreate( $title );
1958         }
1959
1960         /**
1961          * @param $title Title
1962          */
1963         public static function onArticleDelete( $title ) {
1964                 WikiPage::onArticleDelete( $title );
1965         }
1966
1967         /**
1968          * @param $title Title
1969          */
1970         public static function onArticleEdit( $title ) {
1971                 WikiPage::onArticleEdit( $title );
1972         }
1973
1974         /**
1975          * @param $oldtext
1976          * @param $newtext
1977          * @param $flags
1978          * @return string
1979          * @deprecated since 1.20, use ContentHandler::getAutosummary() instead
1980          */
1981         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1982                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1983         }
1984         // ******
1985 }