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 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
 221          *
 222          * @since 1.WD
 223          */
 224    protected function getContentObject() {
 225                 global $wgUser;
 226
 227                 wfProfileIn( __METHOD__ );
 228
 229                 if ( $this->mPage->getID() === 0 ) {
 230                         # If this is a MediaWiki:x message, then load the messages
 231                         # and return the message value for x.
 232                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 233                                 $text = $this->getTitle()->getDefaultMessageText();
 234                                 if ( $text === false ) {
 235                                         $text = '';
 236                                 }
 237
 238                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 239                         } else {
 240                                 $content = new MessageContent( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', null, 'parsemag' );
 241                         }
 242                         wfProfileOut( __METHOD__ );
 243
 244                         return $content;
 245                 } else {
 246                         $this->fetchContentObject();
 247                         wfProfileOut( __METHOD__ );
 248
 249                         return $this->mContentObject;
 250                 }
 251         }
 252
 253         /**
 254          * @return int The oldid of the article that is to be shown, 0 for the
 255          *             current revision
 256          */
 257         public function getOldID() {
 258                 if ( is_null( $this->mOldId ) ) {
 259                         $this->mOldId = $this->getOldIDFromRequest();
 260                 }
 261
 262                 return $this->mOldId;
 263         }
 264
 265         /**
 266          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 267          *
 268          * @return int The old id for the request
 269          */
 270         public function getOldIDFromRequest() {
 271                 global $wgRequest;
 272
 273                 $this->mRedirectUrl = false;
 274
 275                 $oldid = $wgRequest->getIntOrNull( 'oldid' );
 276
 277                 if ( $oldid === null ) {
 278                         return 0;
 279                 }
 280
 281                 if ( $oldid !== 0 ) {
 282                         # Load the given revision and check whether the page is another one.
 283                         # In that case, update this instance to reflect the change.
 284                         if ( $oldid === $this->mPage->getLatest() ) {
 285                                 $this->mRevision = $this->mPage->getRevision();
 286                         } else {
 287                                 $this->mRevision = Revision::newFromId( $oldid );
 288                                 if ( $this->mRevision !== null ) {
 289                                         // Revision title doesn't match the page title given?
 290                                         if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 291                                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 292                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 293                                         }
 294                                 }
 295                         }
 296                 }
 297
 298                 if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 299                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 300                         if ( $nextid ) {
 301                                 $oldid = $nextid;
 302                                 $this->mRevision = null;
 303                         } else {
 304                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 305                         }
 306                 } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 307                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 308                         if ( $previd ) {
 309                                 $oldid = $previd;
 310                                 $this->mRevision = null;
 311                         }
 312                 }
 313
 314                 return $oldid;
 315         }
 316
 317         /**
 318          * Load the revision (including text) into this object
 319          *
 320          * @deprecated in 1.19; use fetchContent()
 321          */
 322         function loadContent() {
 323                 wfDeprecated( __METHOD__, '1.19' );
 324                 $this->fetchContent();
 325         }
 326
 327         /**
 328          * Get text of an article from database
 329          * Does *NOT* follow redirects.
 330          *
 331          * @return mixed string containing article contents, or false if null
 332          * @deprecated in 1.WD, use getContentObject() instead
 333          */
 334         protected function fetchContent() { #BC cruft!
 335                 wfDeprecated( __METHOD__, '1.WD' );
 336
 337                 if ( $this->mContentLoaded && $this->mContent ) {
 338                         return $this->mContent;
 339                 }
 340
 341                 wfProfileIn( __METHOD__ );
 342
 343                 $content = $this->fetchContentObject();
 344
 345                 $this->mContent = ContentHandler::getContentText( $content ); #FIXME: get rid of mContent everywhere!
 346                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ); #BC cruft!
 347
 348                 wfProfileOut( __METHOD__ );
 349
 350                 return $this->mContent;
 351         }
 352
 353
 354         /**
 355          * Get text content object
 356          * Does *NOT* follow redirects.
 357          * TODO: when is this null?
 358          *
 359          * @return Content|null
 360          *
 361          * @since 1.WD
 362          */
 363         protected function fetchContentObject() {
 364                 if ( $this->mContentLoaded ) {
 365                         return $this->mContentObject;
 366                 }
 367
 368                 wfProfileIn( __METHOD__ );
 369
 370                 $this->mContentLoaded = true;
 371                 $this->mContent = null;
 372
 373                 $oldid = $this->getOldID();
 374
 375                 # Pre-fill content with error message so that if something
 376                 # fails we'll have something telling us what we intended.
 377                 $t = $this->getTitle()->getPrefixedText();
 378                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 379                 $this->mContentObject = new MessageContent( 'missing-article', array($t, $d), array() ) ; // @todo: this isn't page content but a UI message. horrible.
 380
 381                 if ( $oldid ) {
 382                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 383                         if ( !$this->mRevision ) {
 384                                 $this->mRevision = Revision::newFromId( $oldid );
 385                                 if ( !$this->mRevision ) {
 386                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 387                                         wfProfileOut( __METHOD__ );
 388                                         return false;
 389                                 }
 390                         }
 391                 } else {
 392                         if ( !$this->mPage->getLatest() ) {
 393                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 394                                 wfProfileOut( __METHOD__ );
 395                                 return false;
 396                         }
 397
 398                         $this->mRevision = $this->mPage->getRevision();
 399
 400                         if ( !$this->mRevision ) {
 401                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 402                                 wfProfileOut( __METHOD__ );
 403                                 return false;
 404                         }
 405                 }
 406
 407                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 408                 // We should instead work with the Revision object when we need it...
 409                 $this->mContentObject = $this->mRevision->getContent( Revision::FOR_THIS_USER ); // Loads if user is allowed
 410                 $this->mRevIdFetched = $this->mRevision->getId();
 411
 412                 wfRunHooks( 'ArticleAfterFetchContentObject', array( &$this, &$this->mContentObject ) ); #FIXME: register new hook
 413
 414                 wfProfileOut( __METHOD__ );
 415
 416                 return $this->mContentObject;
 417         }
 418
 419         /**
 420          * No-op
 421          * @deprecated since 1.18
 422          */
 423         public function forUpdate() {
 424                 wfDeprecated( __METHOD__, '1.18' );
 425         }
 426
 427         /**
 428          * Returns true if the currently-referenced revision is the current edit
 429          * to this page (and it exists).
 430          * @return bool
 431          */
 432         public function isCurrent() {
 433                 # If no oldid, this is the current version.
 434                 if ( $this->getOldID() == 0 ) {
 435                         return true;
 436                 }
 437
 438                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 439         }
 440
 441         /**
 442          * Get the fetched Revision object depending on request parameters or null
 443          * on failure.
 444          *
 445          * @since 1.19
 446          * @return Revision|null
 447          */
 448         public function getRevisionFetched() {
 449                 $this->fetchContentObject();
 450
 451                 return $this->mRevision;
 452         }
 453
 454         /**
 455          * Use this to fetch the rev ID used on page views
 456          *
 457          * @return int revision ID of last article revision
 458          */
 459         public function getRevIdFetched() {
 460                 if ( $this->mRevIdFetched ) {
 461                         return $this->mRevIdFetched;
 462                 } else {
 463                         return $this->mPage->getLatest();
 464                 }
 465         }
 466
 467         /**
 468          * This is the default action of the index.php entry point: just view the
 469          * page of the given title.
 470          */
 471         public function view() {
 472                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 473                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 474
 475                 wfProfileIn( __METHOD__ );
 476
 477                 # Get variables from query string
 478                 # As side effect this will load the revision and update the title
 479                 # in a revision ID is passed in the request, so this should remain
 480                 # the first call of this method even if $oldid is used way below.
 481                 $oldid = $this->getOldID();
 482
 483                 # Another whitelist check in case getOldID() is altering the title
 484                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $wgUser );
 485                 if ( count( $permErrors ) ) {
 486                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 487                         wfProfileOut( __METHOD__ );
 488                         throw new PermissionsError( 'read', $permErrors );
 489                 }
 490
 491                 # getOldID() may as well want us to redirect somewhere else
 492                 if ( $this->mRedirectUrl ) {
 493                         $wgOut->redirect( $this->mRedirectUrl );
 494                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 495                         wfProfileOut( __METHOD__ );
 496
 497                         return;
 498                 }
 499
 500                 # If we got diff in the query, we want to see a diff page instead of the article.
 501                 if ( $wgRequest->getCheck( 'diff' ) ) {
 502                         wfDebug( __METHOD__ . ": showing diff page\n" );
 503                         $this->showDiffPage();
 504                         wfProfileOut( __METHOD__ );
 505
 506                         return;
 507                 }
 508
 509                 # Set page title (may be overridden by DISPLAYTITLE)
 510                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 511
 512                 $wgOut->setArticleFlag( true );
 513                 # Allow frames by default
 514                 $wgOut->allowClickjacking();
 515
 516                 $parserCache = ParserCache::singleton();
 517
 518                 $parserOptions = $this->getParserOptions();
 519                 # Render printable version, use printable version cache
 520                 if ( $wgOut->isPrintable() ) {
 521                         $parserOptions->setIsPrintable( true );
 522                         $parserOptions->setEditSection( false );
 523                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit' ) ) {
 524                         $parserOptions->setEditSection( false );
 525                 }
 526
 527                 # Try client and file cache
 528                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 529                         if ( $wgUseETag ) {
 530                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 531                         }
 532
 533                         # Is it client cached?
 534                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 535                                 wfDebug( __METHOD__ . ": done 304\n" );
 536                                 wfProfileOut( __METHOD__ );
 537
 538                                 return;
 539                         # Try file cache
 540                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 541                                 wfDebug( __METHOD__ . ": done file cache\n" );
 542                                 # tell wgOut that output is taken care of
 543                                 $wgOut->disable();
 544                                 $this->mPage->doViewUpdates( $wgUser );
 545                                 wfProfileOut( __METHOD__ );
 546
 547                                 return;
 548                         }
 549                 }
 550
 551                 # Should the parser cache be used?
 552                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 553                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 554                 if ( $wgUser->getStubThreshold() ) {
 555                         wfIncrStats( 'pcache_miss_stub' );
 556                 }
 557
 558                 $this->showRedirectedFromHeader();
 559                 $this->showNamespaceHeader();
 560
 561                 # Iterate through the possible ways of constructing the output text.
 562                 # Keep going until $outputDone is set, or we run out of things to do.
 563                 $pass = 0;
 564                 $outputDone = false;
 565                 $this->mParserOutput = false;
 566
 567                 while ( !$outputDone && ++$pass ) {
 568                         switch( $pass ) {
 569                                 case 1:
 570                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 571                                         break;
 572                                 case 2:
 573                                         # Early abort if the page doesn't exist
 574                                         if ( !$this->mPage->exists() ) {
 575                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 576                                                 $this->showMissingArticle();
 577                                                 wfProfileOut( __METHOD__ );
 578                                                 return;
 579                                         }
 580
 581                                         # Try the parser cache
 582                                         if ( $useParserCache ) {
 583                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 584
 585                                                 if ( $this->mParserOutput !== false ) {
 586                                                         if ( $oldid ) {
 587                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 588                                                                 $this->setOldSubtitle( $oldid );
 589                                                         } else {
 590                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 591                                                         }
 592                                                         $wgOut->addParserOutput( $this->mParserOutput );
 593                                                         # Ensure that UI elements requiring revision ID have
 594                                                         # the correct version information.
 595                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 596                                                         # Preload timestamp to avoid a DB hit
 597                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 598                                                         if ( $cachedTimestamp !== null ) {
 599                                                                 $wgOut->setRevisionTimestamp( $cachedTimestamp );
 600                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 601                                                         }
 602                                                         $outputDone = true;
 603                                                 }
 604                                         }
 605                                         break;
 606                                 case 3:
 607                                         # This will set $this->mRevision if needed
 608                                         $this->fetchContentObject();
 609
 610                                         # Are we looking at an old revision
 611                                         if ( $oldid && $this->mRevision ) {
 612                                                 $this->setOldSubtitle( $oldid );
 613
 614                                                 if ( !$this->showDeletedRevisionHeader() ) {
 615                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 616                                                         wfProfileOut( __METHOD__ );
 617                                                         return;
 618                                                 }
 619                                         }
 620
 621                                         # Ensure that UI elements requiring revision ID have
 622                                         # the correct version information.
 623                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 624                                         # Preload timestamp to avoid a DB hit
 625                                         $wgOut->setRevisionTimestamp( $this->getTimestamp() );
 626
 627                                         # Pages containing custom CSS or JavaScript get special treatment
 628                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 629                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 630                                                 $this->showCssOrJsPage();
 631                                                 $outputDone = true;
 632                                         } elseif( !wfRunHooks( 'ArticleContentViewCustom', array( $this->fetchContentObject(), $this->getTitle(), $wgOut ) ) ) { #FIXME: document new hook!
 633                                                 # Allow extensions do their own custom view for certain pages
 634                                                 $outputDone = true;
 635                                         } elseif( Hooks::isRegistered( 'ArticleViewCustom' ) && !wfRunHooks( 'ArticleViewCustom', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated! #FIXME: deprecate hook!
 636                                                 # Allow extensions do their own custom view for certain pages
 637                                                 $outputDone = true;
 638                                         } else {
 639                                                 $content = $this->getContentObject();
 640                                                 $rt = $content->getRedirectChain();
 641                                                 if ( $rt ) {
 642                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 643                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 644                                                         $wgOut->addHTML( $this->viewRedirect( $rt ) );
 645                                                         # Parse just to get categories, displaytitle, etc.
 646                                                         $this->mParserOutput = $content->getParserOutput( $this->getContext(), $oldid, $parserOptions, false );
 647                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 648                                                         $outputDone = true;
 649                                                 }
 650                                         }
 651                                         break;
 652                                 case 4:
 653                                         # Run the parse, protected by a pool counter
 654                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 655
 656                                         // @todo: shouldn't we be passing $this->getPage() to PoolWorkArticleView instead of plain $this?
 657                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 658                                                 $this->getRevIdFetched(), $useParserCache, $this->getContentObject(), $this->getContext() );
 659
 660                                         if ( !$poolArticleView->execute() ) {
 661                                                 $error = $poolArticleView->getError();
 662                                                 if ( $error ) {
 663                                                         $wgOut->clearHTML(); // for release() errors
 664                                                         $wgOut->enableClientCache( false );
 665                                                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 666
 667                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 668                                                         $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 669                                                 }
 670                                                 # Connection or timeout error
 671                                                 wfProfileOut( __METHOD__ );
 672                                                 return;
 673                                         }
 674
 675                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 676                                         $wgOut->addParserOutput( $this->mParserOutput );
 677
 678                                         # Don't cache a dirty ParserOutput object
 679                                         if ( $poolArticleView->getIsDirty() ) {
 680                                                 $wgOut->setSquidMaxage( 0 );
 681                                                 $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 682                                         }
 683
 684                                         $outputDone = true;
 685                                         break;
 686                                 # Should be unreachable, but just in case...
 687                                 default:
 688                                         break 2;
 689                         }
 690                 }
 691
 692                 # Get the ParserOutput actually *displayed* here.
 693                 # Note that $this->mParserOutput is the *current* version output.
 694                 $pOutput = ( $outputDone instanceof ParserOutput )
 695                         ? $outputDone // object fetched by hook
 696                         : $this->mParserOutput;
 697
 698                 # Adjust title for main page & pages with displaytitle
 699                 if ( $pOutput ) {
 700                         $this->adjustDisplayTitle( $pOutput );
 701                 }
 702
 703                 # For the main page, overwrite the <title> element with the con-
 704                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 705                 # that's not empty).
 706                 # This message always exists because it is in the i18n files
 707                 if ( $this->getTitle()->isMainPage() ) {
 708                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 709                         if ( !$msg->isDisabled() ) {
 710                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 711                         }
 712                 }
 713
 714                 # Check for any __NOINDEX__ tags on the page using $pOutput
 715                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 716                 $wgOut->setIndexPolicy( $policy['index'] );
 717                 $wgOut->setFollowPolicy( $policy['follow'] );
 718
 719                 $this->showViewFooter();
 720                 $this->mPage->doViewUpdates( $wgUser );
 721
 722                 wfProfileOut( __METHOD__ );
 723         }
 724
 725         /**
 726          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 727          * @param $pOutput ParserOutput
 728          */
 729         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 730                 global $wgOut;
 731                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 732                 $titleText = $pOutput->getTitleText();
 733                 if ( strval( $titleText ) !== '' ) {
 734                         $wgOut->setPageTitle( $titleText );
 735                 }
 736         }
 737
 738         /**
 739          * Show a diff page according to current request variables. For use within
 740          * Article::view() only, other callers should use the DifferenceEngine class.
 741          */
 742         public function showDiffPage() {
 743                 global $wgRequest, $wgUser;
 744
 745                 $diff = $wgRequest->getVal( 'diff' );
 746                 $rcid = $wgRequest->getVal( 'rcid' );
 747                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 748                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 749                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 750                 $oldid = $this->getOldID();
 751
 752                 $contentHandler = ContentHandler::getForTitle( $this->getTitle() );
 753                 $de = $contentHandler->createDifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 754
 755                 // DifferenceEngine directly fetched the revision:
 756                 $this->mRevIdFetched = $de->mNewid;
 757                 $de->showDiffPage( $diffOnly );
 758
 759                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 760                         # Run view updates for current revision only
 761                         $this->mPage->doViewUpdates( $wgUser );
 762                 }
 763         }
 764
 765         /**
 766          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 767          * Article::view() only.
 768          *
 769          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 770          * page views.
 771          */
 772         protected function showCssOrJsPage( $showCacheHint = true ) {
 773                 global $wgOut;
 774
 775                 if ( $showCacheHint ) {
 776                         $dir = $this->getContext()->getLanguage()->getDir();
 777                         $lang = $this->getContext()->getLanguage()->getCode();
 778
 779                         $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 780                                 'clearyourcache' );
 781                 }
 782
 783                 // Give hooks a chance to customise the output
 784                 if ( !Hooks::isRegistered('ShowRawCssJs') || wfRunHooks( 'ShowRawCssJs', array( $this->fetchContent(), $this->getTitle(), $wgOut ) ) ) { #FIXME: fetchContent() is deprecated #FIXME: hook is deprecated
 785                         $po = $this->mContentObject->getParserOutput( $this->getContext() );
 786                         $wgOut->addHTML( $po->getText() );
 787                 }
 788         }
 789
 790         /**
 791          * Get the robot policy to be used for the current view
 792          * @param $action String the action= GET parameter
 793          * @param $pOutput ParserOutput
 794          * @return Array the policy that should be set
 795          * TODO: actions other than 'view'
 796          */
 797         public function getRobotPolicy( $action, $pOutput ) {
 798                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 799                 global $wgDefaultRobotPolicy, $wgRequest;
 800
 801                 $ns = $this->getTitle()->getNamespace();
 802
 803                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 804                         # Don't index user and user talk pages for blocked users (bug 11443)
 805                         if ( !$this->getTitle()->isSubpage() ) {
 806                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 807                                         return array(
 808                                                 'index'  => 'noindex',
 809                                                 'follow' => 'nofollow'
 810                                         );
 811                                 }
 812                         }
 813                 }
 814
 815                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 816                         # Non-articles (special pages etc), and old revisions
 817                         return array(
 818                                 'index'  => 'noindex',
 819                                 'follow' => 'nofollow'
 820                         );
 821                 } elseif ( $wgOut->isPrintable() ) {
 822                         # Discourage indexing of printable versions, but encourage following
 823                         return array(
 824                                 'index'  => 'noindex',
 825                                 'follow' => 'follow'
 826                         );
 827                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 828                         # For ?curid=x urls, disallow indexing
 829                         return array(
 830                                 'index'  => 'noindex',
 831                                 'follow' => 'follow'
 832                         );
 833                 }
 834
 835                 # Otherwise, construct the policy based on the various config variables.
 836                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 837
 838                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 839                         # Honour customised robot policies for this namespace
 840                         $policy = array_merge(
 841                                 $policy,
 842                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 843                         );
 844                 }
 845                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 846                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 847                         # a final sanity check that we have really got the parser output.
 848                         $policy = array_merge(
 849                                 $policy,
 850                                 array( 'index' => $pOutput->getIndexPolicy() )
 851                         );
 852                 }
 853
 854                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 855                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 856                         $policy = array_merge(
 857                                 $policy,
 858                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 859                         );
 860                 }
 861
 862                 return $policy;
 863         }
 864
 865         /**
 866          * Converts a String robot policy into an associative array, to allow
 867          * merging of several policies using array_merge().
 868          * @param $policy Mixed, returns empty array on null/false/'', transparent
 869          *            to already-converted arrays, converts String.
 870          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 871          */
 872         public static function formatRobotPolicy( $policy ) {
 873                 if ( is_array( $policy ) ) {
 874                         return $policy;
 875                 } elseif ( !$policy ) {
 876                         return array();
 877                 }
 878
 879                 $policy = explode( ',', $policy );
 880                 $policy = array_map( 'trim', $policy );
 881
 882                 $arr = array();
 883                 foreach ( $policy as $var ) {
 884                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 885                                 $arr['index'] = $var;
 886                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 887                                 $arr['follow'] = $var;
 888                         }
 889                 }
 890
 891                 return $arr;
 892         }
 893
 894         /**
 895          * If this request is a redirect view, send "redirected from" subtitle to
 896          * $wgOut. Returns true if the header was needed, false if this is not a
 897          * redirect view. Handles both local and remote redirects.
 898          *
 899          * @return boolean
 900          */
 901         public function showRedirectedFromHeader() {
 902                 global $wgOut, $wgRequest, $wgRedirectSources;
 903
 904                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 905
 906                 if ( isset( $this->mRedirectedFrom ) ) {
 907                         // This is an internally redirected page view.
 908                         // We'll need a backlink to the source page for navigation.
 909                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 910                                 $redir = Linker::linkKnown(
 911                                         $this->mRedirectedFrom,
 912                                         null,
 913                                         array(),
 914                                         array( 'redirect' => 'no' )
 915                                 );
 916
 917                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 918
 919                                 // Set the fragment if one was specified in the redirect
 920                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 921                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 922                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 923                                 }
 924
 925                                 // Add a <link rel="canonical"> tag
 926                                 $wgOut->addLink( array( 'rel' => 'canonical',
 927                                         'href' => $this->getTitle()->getLocalURL() )
 928                                 );
 929
 930                                 // Tell $wgOut the user arrived at this article through a redirect
 931                                 $wgOut->setRedirectedFrom( $this->mRedirectedFrom );
 932
 933                                 return true;
 934                         }
 935                 } elseif ( $rdfrom ) {
 936                         // This is an externally redirected view, from some other wiki.
 937                         // If it was reported from a trusted site, supply a backlink.
 938                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 939                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 940                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 941
 942                                 return true;
 943                         }
 944                 }
 945
 946                 return false;
 947         }
 948
 949         /**
 950          * Show a header specific to the namespace currently being viewed, like
 951          * [[MediaWiki:Talkpagetext]]. For Article::view().
 952          */
 953         public function showNamespaceHeader() {
 954                 global $wgOut;
 955
 956                 if ( $this->getTitle()->isTalkPage() ) {
 957                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 958                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 959                         }
 960                 }
 961         }
 962
 963         /**
 964          * Show the footer section of an ordinary page view
 965          */
 966         public function showViewFooter() {
 967                 global $wgOut;
 968
 969                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 970                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 971                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 972                 }
 973
 974                 # If we have been passed an &rcid= parameter, we want to give the user a
 975                 # chance to mark this new article as patrolled.
 976                 $this->showPatrolFooter();
 977
 978                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 979
 980         }
 981
 982         /**
 983          * If patrol is possible, output a patrol UI box. This is called from the
 984          * footer section of ordinary page views. If patrol is not possible or not
 985          * desired, does nothing.
 986          */
 987         public function showPatrolFooter() {
 988                 global $wgOut, $wgRequest, $wgUser;
 989
 990                 $rcid = $wgRequest->getVal( 'rcid' );
 991
 992                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 993                         return;
 994                 }
 995
 996                 $token = $wgUser->getEditToken( $rcid );
 997                 $wgOut->preventClickjacking();
 998
 999                 $wgOut->addHTML(
1000                         "<div class='patrollink'>" .
1001                                 wfMsgHtml(
1002                                         'markaspatrolledlink',
1003                                         Linker::link(
1004                                                 $this->getTitle(),
1005                                                 wfMsgHtml( 'markaspatrolledtext' ),
1006                                                 array(),
1007                                                 array(
1008                                                         'action' => 'markpatrolled',
1009                                                         'rcid' => $rcid,
1010                                                         'token' => $token,
1011                                                 ),
1012                                                 array( 'known', 'noclasses' )
1013                                         )
1014                                 ) .
1015                         '</div>'
1016                 );
1017         }
1018
1019         /**
1020          * Show the error text for a missing article. For articles in the MediaWiki
1021          * namespace, show the default message text. To be called from Article::view().
1022          */
1023         public function showMissingArticle() {
1024                 global $wgOut, $wgRequest, $wgUser, $wgSend404Code;
1025
1026                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1027                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
1028                         $parts = explode( '/', $this->getTitle()->getText() );
1029                         $rootPart = $parts[0];
1030                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1031                         $ip = User::isIP( $rootPart );
1032
1033                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1034                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1035                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1036                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1037                                 LogEventsList::showLogExtract(
1038                                         $wgOut,
1039                                         'block',
1040                                         $user->getUserPage()->getPrefixedText(),
1041                                         '',
1042                                         array(
1043                                                 'lim' => 1,
1044                                                 'showIfEmpty' => false,
1045                                                 'msgKey' => array(
1046                                                         'blocked-notice-logextract',
1047                                                         $user->getName() # Support GENDER in notice
1048                                                 )
1049                                         )
1050                                 );
1051                         }
1052                 }
1053
1054                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1055
1056                 # Show delete and move logs
1057                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
1058                         array(  'lim' => 10,
1059                                 'conds' => array( "log_action != 'revision'" ),
1060                                 'showIfEmpty' => false,
1061                                 'msgKey' => array( 'moveddeleted-notice' ) )
1062                 );
1063
1064                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1065                         // If there's no backing content, send a 404 Not Found
1066                         // for better machine handling of broken links.
1067                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
1068                 }
1069
1070                 $hookResult = wfRunHooks( 'BeforeDisplayNoArticleText', array( $this ) );
1071
1072                 if ( ! $hookResult ) {
1073                         return;
1074                 }
1075
1076                 # Show error message
1077                 $oldid = $this->getOldID();
1078                 if ( $oldid ) {
1079                         $text = wfMsgNoTrans( 'missing-article',
1080                                 $this->getTitle()->getPrefixedText(),
1081                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
1082                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1083                         // Use the default message text
1084                         $text = $this->getTitle()->getDefaultMessageText();
1085                 } else {
1086                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
1087                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
1088                         $errors = array_merge( $createErrors, $editErrors );
1089
1090                         if ( !count( $errors ) ) {
1091                                 $text = wfMsgNoTrans( 'noarticletext' );
1092                         } else {
1093                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1094                         }
1095                 }
1096                 $text = "<div class='noarticletext'>\n$text\n</div>";
1097
1098                 $wgOut->addWikiText( $text );
1099         }
1100
1101         /**
1102          * If the revision requested for view is deleted, check permissions.
1103          * Send either an error message or a warning header to $wgOut.
1104          *
1105          * @return boolean true if the view is allowed, false if not.
1106          */
1107         public function showDeletedRevisionHeader() {
1108                 global $wgOut, $wgRequest;
1109
1110                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1111                         // Not deleted
1112                         return true;
1113                 }
1114
1115                 // If the user is not allowed to see it...
1116                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1117                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1118                                 'rev-deleted-text-permission' );
1119
1120                         return false;
1121                 // If the user needs to confirm that they want to see it...
1122                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1123                         # Give explanation and add a link to view the revision...
1124                         $oldid = intval( $this->getOldID() );
1125                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1126                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1127                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1128                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1129                                 array( $msg, $link ) );
1130
1131                         return false;
1132                 // We are allowed to see...
1133                 } else {
1134                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1135                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1136                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1137
1138                         return true;
1139                 }
1140         }
1141
1142         /**
1143          * Generate the navigation links when browsing through an article revisions
1144          * It shows the information as:
1145          *   Revision as of \<date\>; view current revision
1146          *   \<- Previous version | Next Version -\>
1147          *
1148          * @param $oldid String: revision ID of this article revision
1149          */
1150         public function setOldSubtitle( $oldid = 0 ) {
1151                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1152
1153                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1154                         return;
1155                 }
1156
1157                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1158
1159                 # Cascade unhide param in links for easy deletion browsing
1160                 $extraParams = array();
1161                 if ( $unhide ) {
1162                         $extraParams['unhide'] = 1;
1163                 }
1164
1165                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1166                         $revision = $this->mRevision;
1167                 } else {
1168                         $revision = Revision::newFromId( $oldid );
1169                 }
1170
1171                 $timestamp = $revision->getTimestamp();
1172
1173                 $current = ( $oldid == $this->mPage->getLatest() );
1174                 $td = $wgLang->timeanddate( $timestamp, true );
1175                 $tddate = $wgLang->date( $timestamp, true );
1176                 $tdtime = $wgLang->time( $timestamp, true );
1177
1178                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1179                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1180
1181                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1182                         ? 'revision-info-current'
1183                         : 'revision-info';
1184
1185                 $wgOut->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1186                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1187                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1188
1189                 $lnk = $current
1190                         ? wfMsgHtml( 'currentrevisionlink' )
1191                         : Linker::link(
1192                                 $this->getTitle(),
1193                                 wfMsgHtml( 'currentrevisionlink' ),
1194                                 array(),
1195                                 $extraParams,
1196                                 array( 'known', 'noclasses' )
1197                         );
1198                 $curdiff = $current
1199                         ? wfMsgHtml( 'diff' )
1200                         : Linker::link(
1201                                 $this->getTitle(),
1202                                 wfMsgHtml( 'diff' ),
1203                                 array(),
1204                                 array(
1205                                         'diff' => 'cur',
1206                                         'oldid' => $oldid
1207                                 ) + $extraParams,
1208                                 array( 'known', 'noclasses' )
1209                         );
1210                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1211                 $prevlink = $prev
1212                         ? Linker::link(
1213                                 $this->getTitle(),
1214                                 wfMsgHtml( 'previousrevision' ),
1215                                 array(),
1216                                 array(
1217                                         'direction' => 'prev',
1218                                         'oldid' => $oldid
1219                                 ) + $extraParams,
1220                                 array( 'known', 'noclasses' )
1221                         )
1222                         : wfMsgHtml( 'previousrevision' );
1223                 $prevdiff = $prev
1224                         ? Linker::link(
1225                                 $this->getTitle(),
1226                                 wfMsgHtml( 'diff' ),
1227                                 array(),
1228                                 array(
1229                                         'diff' => 'prev',
1230                                         'oldid' => $oldid
1231                                 ) + $extraParams,
1232                                 array( 'known', 'noclasses' )
1233                         )
1234                         : wfMsgHtml( 'diff' );
1235                 $nextlink = $current
1236                         ? wfMsgHtml( 'nextrevision' )
1237                         : Linker::link(
1238                                 $this->getTitle(),
1239                                 wfMsgHtml( 'nextrevision' ),
1240                                 array(),
1241                                 array(
1242                                         'direction' => 'next',
1243                                         'oldid' => $oldid
1244                                 ) + $extraParams,
1245                                 array( 'known', 'noclasses' )
1246                         );
1247                 $nextdiff = $current
1248                         ? wfMsgHtml( 'diff' )
1249                         : Linker::link(
1250                                 $this->getTitle(),
1251                                 wfMsgHtml( 'diff' ),
1252                                 array(),
1253                                 array(
1254                                         'diff' => 'next',
1255                                         'oldid' => $oldid
1256                                 ) + $extraParams,
1257                                 array( 'known', 'noclasses' )
1258                         );
1259
1260                 $cdel = Linker::getRevDeleteLink( $wgUser, $revision, $this->getTitle() );
1261                 if ( $cdel !== '' ) {
1262                         $cdel .= ' ';
1263                 }
1264
1265                 $wgOut->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1266                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1267                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1268         }
1269
1270         /**
1271          * View redirect
1272          *
1273          * @param $target Title|Array of destination(s) to redirect
1274          * @param $appendSubtitle Boolean [optional]
1275          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1276          * @return string containing HMTL with redirect link
1277          */
1278         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1279                 global $wgOut, $wgStylePath;
1280
1281                 if ( !is_array( $target ) ) {
1282                         $target = array( $target );
1283                 }
1284
1285                 $lang = $this->getTitle()->getPageLanguage();
1286                 $imageDir = $lang->getDir();
1287
1288                 if ( $appendSubtitle ) {
1289                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1290                 }
1291
1292                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1293
1294                 /**
1295                  * @var $title Title
1296                  */
1297                 $title = array_shift( $target );
1298
1299                 if ( $forceKnown ) {
1300                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1301                 } else {
1302                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1303                 }
1304
1305                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1306                 $alt = $lang->isRTL() ? '←' : '→';
1307                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1308                 foreach ( $target as $rt ) {
1309                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1310                         if ( $forceKnown ) {
1311                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1312                         } else {
1313                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1314                         }
1315                 }
1316
1317                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1318                 return '<div class="redirectMsg">' .
1319                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1320                         '<span class="redirectText">' . $link . '</span></div>';
1321         }
1322
1323         /**
1324          * Handle action=render
1325          */
1326         public function render() {
1327                 global $wgOut;
1328
1329                 $wgOut->setArticleBodyOnly( true );
1330                 $this->view();
1331         }
1332
1333         /**
1334          * action=protect handler
1335          */
1336         public function protect() {
1337                 $form = new ProtectionForm( $this );
1338                 $form->execute();
1339         }
1340
1341         /**
1342          * action=unprotect handler (alias)
1343          */
1344         public function unprotect() {
1345                 $this->protect();
1346         }
1347
1348         /**
1349          * UI entry point for page deletion
1350          */
1351         public function delete() {
1352                 global $wgOut, $wgRequest, $wgLang;
1353
1354                 # This code desperately needs to be totally rewritten
1355
1356                 $title = $this->getTitle();
1357                 $user = $this->getContext()->getUser();
1358
1359                 # Check permissions
1360                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1361                 if ( count( $permission_errors ) ) {
1362                         throw new PermissionsError( 'delete', $permission_errors );
1363                 }
1364
1365                 # Read-only check...
1366                 if ( wfReadOnly() ) {
1367                         throw new ReadOnlyError;
1368                 }
1369
1370                 # Better double-check that it hasn't been deleted yet!
1371                 $dbw = wfGetDB( DB_MASTER );
1372                 $conds = $title->pageCond();
1373                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1374                 if ( $latest === false ) {
1375                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1376                         $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1377                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1378                                 );
1379                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1380                         LogEventsList::showLogExtract(
1381                                 $wgOut,
1382                                 'delete',
1383                                 $title->getPrefixedText()
1384                         );
1385
1386                         return;
1387                 }
1388
1389                 $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1390                 $deleteReason = $wgRequest->getText( 'wpReason' );
1391
1392                 if ( $deleteReasonList == 'other' ) {
1393                         $reason = $deleteReason;
1394                 } elseif ( $deleteReason != '' ) {
1395                         // Entry from drop down menu + additional comment
1396                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1397                 } else {
1398                         $reason = $deleteReasonList;
1399                 }
1400
1401                 if ( $wgRequest->wasPosted() && $user->matchEditToken( $wgRequest->getVal( 'wpEditToken' ),
1402                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1403                 {
1404                         # Flag to hide all contents of the archived revisions
1405                         $suppress = $wgRequest->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1406
1407                         $this->doDelete( $reason, $suppress );
1408
1409                         if ( $wgRequest->getCheck( 'wpWatch' ) && $user->isLoggedIn() ) {
1410                                 $this->doWatch();
1411                         } elseif ( $title->userIsWatching() ) {
1412                                 $this->doUnwatch();
1413                         }
1414
1415                         return;
1416                 }
1417
1418                 // Generate deletion reason
1419                 $hasHistory = false;
1420                 if ( !$reason ) {
1421                         try {
1422                                 $reason = $this->generateReason( $hasHistory );
1423                         } catch (MWException $e) {
1424                                 # if a page is horribly broken, we still want to be able to delete it. so be lenient about errors here.
1425                                 wfDebug("Error while building auto delete summary: $e");
1426                                 $reason = '';
1427                         }
1428                 }
1429
1430                 // If the page has a history, insert a warning
1431                 if ( $hasHistory ) {
1432                         $revisions = $this->mTitle->estimateRevisionCount();
1433                         // @todo FIXME: i18n issue/patchwork message
1434                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1435                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1436                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1437                                         wfMsgHtml( 'history' ),
1438                                         array( 'rel' => 'archives' ),
1439                                         array( 'action' => 'history' ) ) .
1440                                 '</strong>'
1441                         );
1442
1443                         if ( $this->mTitle->isBigDeletion() ) {
1444                                 global $wgDeleteRevisionsLimit;
1445                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1446                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1447                         }
1448                 }
1449
1450                 return $this->confirmDelete( $reason );
1451         }
1452
1453         /**
1454          * Output deletion confirmation dialog
1455          * @todo FIXME: Move to another file?
1456          * @param $reason String: prefilled reason
1457          */
1458         public function confirmDelete( $reason ) {
1459                 global $wgOut;
1460
1461                 wfDebug( "Article::confirmDelete\n" );
1462
1463                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1464                 $wgOut->addBacklinkSubtitle( $this->getTitle() );
1465                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1466                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1467
1468                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1469
1470                 $user = $this->getContext()->getUser();
1471
1472                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1473                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1474                                         <td></td>
1475                                         <td class='mw-input'><strong>" .
1476                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1477                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1478                                         "</strong></td>
1479                                 </tr>";
1480                 } else {
1481                         $suppress = '';
1482                 }
1483                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1484
1485                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1486                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1487                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1488                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1489                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1490                         "<tr id=\"wpDeleteReasonListRow\">
1491                                 <td class='mw-label'>" .
1492                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1493                                 "</td>
1494                                 <td class='mw-input'>" .
1495                                         Xml::listDropDown( 'wpDeleteReasonList',
1496                                                 wfMsgForContent( 'deletereason-dropdown' ),
1497                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1498                                 "</td>
1499                         </tr>
1500                         <tr id=\"wpDeleteReasonRow\">
1501                                 <td class='mw-label'>" .
1502                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1503                                 "</td>
1504                                 <td class='mw-input'>" .
1505                                 Html::input( 'wpReason', $reason, 'text', array(
1506                                         'size' => '60',
1507                                         'maxlength' => '255',
1508                                         'tabindex' => '2',
1509                                         'id' => 'wpReason',
1510                                         'autofocus'
1511                                 ) ) .
1512                                 "</td>
1513                         </tr>";
1514
1515                 # Disallow watching if user is not logged in
1516                 if ( $user->isLoggedIn() ) {
1517                         $form .= "
1518                         <tr>
1519                                 <td></td>
1520                                 <td class='mw-input'>" .
1521                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1522                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1523                                 "</td>
1524                         </tr>";
1525                 }
1526
1527                 $form .= "
1528                         $suppress
1529                         <tr>
1530                                 <td></td>
1531                                 <td class='mw-submit'>" .
1532                                         Xml::submitButton( wfMsg( 'deletepage' ),
1533                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1534                                 "</td>
1535                         </tr>" .
1536                         Xml::closeElement( 'table' ) .
1537                         Xml::closeElement( 'fieldset' ) .
1538                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1539                         Xml::closeElement( 'form' );
1540
1541                         if ( $user->isAllowed( 'editinterface' ) ) {
1542                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1543                                 $link = Linker::link(
1544                                         $title,
1545                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1546                                         array(),
1547                                         array( 'action' => 'edit' )
1548                                 );
1549                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1550                         }
1551
1552                 $wgOut->addHTML( $form );
1553                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1554                 LogEventsList::showLogExtract( $wgOut, 'delete',
1555                         $this->getTitle()->getPrefixedText()
1556                 );
1557         }
1558
1559         /**
1560          * Perform a deletion and output success or failure messages
1561          * @param $reason
1562          * @param $suppress bool
1563          */
1564         public function doDelete( $reason, $suppress = false ) {
1565                 global $wgOut;
1566
1567                 $error = '';
1568                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, 0, true, $error ) ) {
1569                         $deleted = $this->getTitle()->getPrefixedText();
1570
1571                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1572                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1573
1574                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1575
1576                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1577                         $wgOut->returnToMain( false );
1578                 } else {
1579                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1580                         if ( $error == '' ) {
1581                                 $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1582                                         array( 'cannotdelete', wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1583                                 );
1584                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1585
1586                                 LogEventsList::showLogExtract(
1587                                         $wgOut,
1588                                         'delete',
1589                                         $this->getTitle()->getPrefixedText()
1590                                 );
1591                         } else {
1592                                 $wgOut->addHTML( $error );
1593                         }
1594                 }
1595         }
1596
1597         /* Caching functions */
1598
1599         /**
1600          * checkLastModified returns true if it has taken care of all
1601          * output to the client that is necessary for this request.
1602          * (that is, it has sent a cached version of the page)
1603          *
1604          * @return boolean true if cached version send, false otherwise
1605          */
1606         protected function tryFileCache() {
1607                 static $called = false;
1608
1609                 if ( $called ) {
1610                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1611                         return false;
1612                 }
1613
1614                 $called = true;
1615                 if ( $this->isFileCacheable() ) {
1616                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1617                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1618                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1619                                 $cache->loadFromFileCache( $this->getContext() );
1620                                 return true;
1621                         } else {
1622                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1623                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1624                         }
1625                 } else {
1626                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1627                 }
1628
1629                 return false;
1630         }
1631
1632         /**
1633          * Check if the page can be cached
1634          * @return bool
1635          */
1636         public function isFileCacheable() {
1637                 $cacheable = false;
1638
1639                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1640                         $cacheable = $this->mPage->getID()
1641                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1642                         // Extension may have reason to disable file caching on some pages.
1643                         if ( $cacheable ) {
1644                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1645                         }
1646                 }
1647
1648                 return $cacheable;
1649         }
1650
1651         /**#@-*/
1652
1653         /**
1654          * Lightweight method to get the parser output for a page, checking the parser cache
1655          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1656          * consider, so it's not appropriate to use there.
1657          *
1658          * @since 1.16 (r52326) for LiquidThreads
1659          *
1660          * @param $oldid mixed integer Revision ID or null
1661          * @param $user User The relevant user
1662          * @return ParserOutput or false if the given revsion ID is not found
1663          */
1664         public function getParserOutput( $oldid = null, User $user = null ) {
1665                 global $wgUser;
1666
1667                 $user = is_null( $user ) ? $wgUser : $user;
1668                 $parserOptions = $this->mPage->makeParserOptions( $user );
1669
1670                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1671         }
1672
1673         /**
1674          * Get parser options suitable for rendering the primary article wikitext
1675          * @return ParserOptions
1676          */
1677         public function getParserOptions() {
1678                 global $wgUser;
1679                 if ( !$this->mParserOptions ) {
1680                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1681                 }
1682                 // Clone to allow modifications of the return value without affecting cache
1683                 return clone $this->mParserOptions;
1684         }
1685
1686         /**
1687          * Sets the context this Article is executed in
1688          *
1689          * @param $context IContextSource
1690          * @since 1.18
1691          */
1692         public function setContext( $context ) {
1693                 $this->mContext = $context;
1694         }
1695
1696         /**
1697          * Gets the context this Article is executed in
1698          *
1699          * @return IContextSource
1700          * @since 1.18
1701          */
1702         public function getContext() {
1703                 if ( $this->mContext instanceof IContextSource ) {
1704                         return $this->mContext;
1705                 } else {
1706                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1707                         return RequestContext::getMain();
1708                 }
1709         }
1710
1711         /**
1712          * Info about this page
1713          * @deprecated since 1.19
1714          */
1715         public function info() {
1716                 wfDeprecated( __METHOD__, '1.19' );
1717                 Action::factory( 'info', $this )->show();
1718         }
1719
1720         /**
1721          * Mark this particular edit/page as patrolled
1722          * @deprecated since 1.18
1723          */
1724         public function markpatrolled() {
1725                 wfDeprecated( __METHOD__, '1.18' );
1726                 Action::factory( 'markpatrolled', $this )->show();
1727         }
1728
1729         /**
1730          * Handle action=purge
1731          * @deprecated since 1.19
1732          */
1733         public function purge() {
1734                 return Action::factory( 'purge', $this )->show();
1735         }
1736
1737         /**
1738          * Handle action=revert
1739          * @deprecated since 1.19
1740          */
1741         public function revert() {
1742                 wfDeprecated( __METHOD__, '1.19' );
1743                 Action::factory( 'revert', $this )->show();
1744         }
1745
1746         /**
1747          * Handle action=rollback
1748          * @deprecated since 1.19
1749          */
1750         public function rollback() {
1751                 wfDeprecated( __METHOD__, '1.19' );
1752                 Action::factory( 'rollback', $this )->show();
1753         }
1754
1755         /**
1756          * User-interface handler for the "watch" action.
1757          * Requires Request to pass a token as of 1.18.
1758          * @deprecated since 1.18
1759          */
1760         public function watch() {
1761                 wfDeprecated( __METHOD__, '1.18' );
1762                 Action::factory( 'watch', $this )->show();
1763         }
1764
1765         /**
1766          * Add this page to $wgUser's watchlist
1767          *
1768          * This is safe to be called multiple times
1769          *
1770          * @return bool true on successful watch operation
1771          * @deprecated since 1.18
1772          */
1773         public function doWatch() {
1774                 global $wgUser;
1775                 wfDeprecated( __METHOD__, '1.18' );
1776                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1777         }
1778
1779         /**
1780          * User interface handler for the "unwatch" action.
1781          * Requires Request to pass a token as of 1.18.
1782          * @deprecated since 1.18
1783          */
1784         public function unwatch() {
1785                 wfDeprecated( __METHOD__, '1.18' );
1786                 Action::factory( 'unwatch', $this )->show();
1787         }
1788
1789         /**
1790          * Stop watching a page
1791          * @return bool true on successful unwatch
1792          * @deprecated since 1.18
1793          */
1794         public function doUnwatch() {
1795                 global $wgUser;
1796                 wfDeprecated( __METHOD__, '1.18' );
1797                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1798         }
1799
1800         /**
1801          * Output a redirect back to the article.
1802          * This is typically used after an edit.
1803          *
1804          * @deprecated in 1.18; call $wgOut->redirect() directly
1805          * @param $noRedir Boolean: add redirect=no
1806          * @param $sectionAnchor String: section to redirect to, including "#"
1807          * @param $extraQuery String: extra query params
1808          */
1809         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1810                 wfDeprecated( __METHOD__, '1.18' );
1811                 global $wgOut;
1812
1813                 if ( $noRedir ) {
1814                         $query = 'redirect=no';
1815                         if ( $extraQuery )
1816                                 $query .= "&$extraQuery";
1817                 } else {
1818                         $query = $extraQuery;
1819                 }
1820
1821                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1822         }
1823
1824         /**
1825          * Use PHP's magic __get handler to handle accessing of
1826          * raw WikiPage fields for backwards compatibility.
1827          *
1828          * @param $fname String Field name
1829          */
1830         public function __get( $fname ) {
1831                 if ( property_exists( $this->mPage, $fname ) ) {
1832                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1833                         return $this->mPage->$fname;
1834                 }
1835                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1836         }
1837
1838         /**
1839          * Use PHP's magic __set handler to handle setting of
1840          * raw WikiPage fields for backwards compatibility.
1841          *
1842          * @param $fname String Field name
1843          * @param $fvalue mixed New value
1844          */
1845         public function __set( $fname, $fvalue ) {
1846                 if ( property_exists( $this->mPage, $fname ) ) {
1847                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1848                         $this->mPage->$fname = $fvalue;
1849                 // Note: extensions may want to toss on new fields
1850                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1851                         $this->mPage->$fname = $fvalue;
1852                 } else {
1853                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1854                 }
1855         }
1856
1857         /**
1858          * Use PHP's magic __call handler to transform instance calls to
1859          * WikiPage functions for backwards compatibility.
1860          *
1861          * @param $fname String Name of called method
1862          * @param $args Array Arguments to the method
1863          * @return mixed
1864          */
1865         public function __call( $fname, $args ) {
1866                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1867                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1868                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1869                 }
1870                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1871         }
1872
1873         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1874
1875         /**
1876          * @param $limit array
1877          * @param $expiry array
1878          * @param $cascade bool
1879          * @param $reason string
1880          * @param $user User
1881          * @return Status
1882          */
1883         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1884                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1885         }
1886
1887         /**
1888          * @param $limit array
1889          * @param $reason string
1890          * @param $cascade int
1891          * @param $expiry array
1892          * @return bool
1893          */
1894         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1895                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1896         }
1897
1898         /**
1899          * @param $reason string
1900          * @param $suppress bool
1901          * @param $id int
1902          * @param $commit bool
1903          * @param $error string
1904          * @return bool
1905          */
1906         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1907                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1908         }
1909
1910         /**
1911          * @param $fromP
1912          * @param $summary
1913          * @param $token
1914          * @param $bot
1915          * @param $resultDetails
1916          * @param $user User
1917          * @return array
1918          */
1919         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1920                 global $wgUser;
1921                 $user = is_null( $user ) ? $wgUser : $user;
1922                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1923         }
1924
1925         /**
1926          * @param $fromP
1927          * @param $summary
1928          * @param $bot
1929          * @param $resultDetails
1930          * @param $guser User
1931          * @return array
1932          */
1933         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1934                 global $wgUser;
1935                 $guser = is_null( $guser ) ? $wgUser : $guser;
1936                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1937         }
1938
1939         /**
1940          * @param $hasHistory bool
1941          * @return mixed
1942          */
1943         public function generateReason( &$hasHistory ) {
1944                 $title = $this->mPage->getTitle();
1945                 $handler = ContentHandler::getForTitle( $title );
1946                 return $handler->getAutoDeleteReason( $title, $hasHistory );
1947         }
1948
1949         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1950
1951         /**
1952          * @return array
1953          */
1954         public static function selectFields() {
1955                 return WikiPage::selectFields();
1956         }
1957
1958         /**
1959          * @param $title Title
1960          */
1961         public static function onArticleCreate( $title ) {
1962                 WikiPage::onArticleCreate( $title );
1963         }
1964
1965         /**
1966          * @param $title Title
1967          */
1968         public static function onArticleDelete( $title ) {
1969                 WikiPage::onArticleDelete( $title );
1970         }
1971
1972         /**
1973          * @param $title Title
1974          */
1975         public static function onArticleEdit( $title ) {
1976                 WikiPage::onArticleEdit( $title );
1977         }
1978
1979         /**
1980          * @param $oldtext
1981          * @param $newtext
1982          * @param $flags
1983          * @return string
1984          * @deprecated since 1.WD, use ContentHandler::getAutosummary() instead
1985          */
1986         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1987                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1988         }
1989         // ******
1990 }