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