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