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