includes/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki article and history.
  25  *
  26  * This maintains WikiPage functions for backwards compatibility.
  27  *
  28  * @todo move and rewrite code to an Action class
  29  *
  30  * See design.txt for an overview.
  31  * Note: edit user interface and cache support functions have been
  32  * moved to separate EditPage and HTMLFileCache classes.
  33  *
  34  * @internal documentation reviewed 15 Mar 2010
  35  */
  36 class Article extends Page {
  37         /**@{{
  38          * @private
  39          */
  40
  41         /**
  42          * The context this Article is executed in
  43          * @var IContextSource $mContext
  44          */
  45         protected $mContext;
  46
  47         /**
  48          * The WikiPage object of this instance
  49          * @var WikiPage $mPage
  50          */
  51         protected $mPage;
  52
  53         /**
  54          * ParserOptions object for $wgUser articles
  55          * @var ParserOptions $mParserOptions
  56          */
  57         public $mParserOptions;
  58
  59         /**
  60          * Text of the revision we are working on
  61          * @var string $mContent
  62          */
  63         var $mContent;                    // !< #BC cruft
  64
  65         /**
  66          * Content of the revision we are working on
  67          * @var Content
  68          * @since 1.21
  69          */
  70         var $mContentObject;              // !<
  71
  72         /**
  73          * Is the content ($mContent) already loaded?
  74          * @var bool $mContentLoaded
  75          */
  76         var $mContentLoaded = false;      // !<
  77
  78         /**
  79          * The oldid of the article that is to be shown, 0 for the
  80          * current revision
  81          * @var int|null $mOldId
  82          */
  83         var $mOldId;                      // !<
  84
  85         /**
  86          * Title from which we were redirected here
  87          * @var Title $mRedirectedFrom
  88          */
  89         var $mRedirectedFrom = null;
  90
  91         /**
  92          * URL to redirect to or false if none
  93          * @var string|false $mRedirectUrl
  94          */
  95         var $mRedirectUrl = false;        // !<
  96
  97         /**
  98          * Revision ID of revision we are working on
  99          * @var int $mRevIdFetched
 100          */
 101         var $mRevIdFetched = 0;           // !<
 102
 103         /**
 104          * Revision we are working on
 105          * @var Revision $mRevision
 106          */
 107         var $mRevision = null;
 108
 109         /**
 110          * ParserOutput object
 111          * @var ParserOutput $mParserOutput
 112          */
 113         var $mParserOutput;
 114
 115         /**@}}*/
 116
 117         /**
 118          * Constructor and clear the article
 119          * @param $title Title Reference to a Title object.
 120          * @param $oldId Integer revision ID, null to fetch from request, zero for current
 121          */
 122         public function __construct( Title $title, $oldId = null ) {
 123                 $this->mOldId = $oldId;
 124                 $this->mPage = $this->newPage( $title );
 125         }
 126
 127         /**
 128          * @param $title Title
 129          * @return WikiPage
 130          */
 131         protected function newPage( Title $title ) {
 132                 return new WikiPage( $title );
 133         }
 134
 135         /**
 136          * Constructor from a page id
 137          * @param $id Int article ID to load
 138          * @return Article|null
 139          */
 140         public static function newFromID( $id ) {
 141                 $t = Title::newFromID( $id );
 142                 # @todo FIXME: Doesn't inherit right
 143                 return $t == null ? null : new self( $t );
 144                 # return $t == null ? null : new static( $t ); // PHP 5.3
 145         }
 146
 147         /**
 148          * Create an Article object of the appropriate class for the given page.
 149          *
 150          * @param $title Title
 151          * @param $context IContextSource
 152          * @return Article object
 153          */
 154         public static function newFromTitle( $title, IContextSource $context ) {
 155                 if ( NS_MEDIA == $title->getNamespace() ) {
 156                         // FIXME: where should this go?
 157                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 158                 }
 159
 160                 $page = null;
 161                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 162                 if ( !$page ) {
 163                         switch( $title->getNamespace() ) {
 164                                 case NS_FILE:
 165                                         $page = new ImagePage( $title );
 166                                         break;
 167                                 case NS_CATEGORY:
 168                                         $page = new CategoryPage( $title );
 169                                         break;
 170                                 default:
 171                                         $page = new Article( $title );
 172                         }
 173                 }
 174                 $page->setContext( $context );
 175
 176                 return $page;
 177         }
 178
 179         /**
 180          * Create an Article object of the appropriate class for the given page.
 181          *
 182          * @param $page WikiPage
 183          * @param $context IContextSource
 184          * @return Article object
 185          */
 186         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 187                 $article = self::newFromTitle( $page->getTitle(), $context );
 188                 $article->mPage = $page; // override to keep process cached vars
 189                 return $article;
 190         }
 191
 192         /**
 193          * Tell the page view functions that this view was redirected
 194          * from another page on the wiki.
 195          * @param $from Title object.
 196          */
 197         public function setRedirectedFrom( Title $from ) {
 198                 $this->mRedirectedFrom = $from;
 199         }
 200
 201         /**
 202          * Get the title object of the article
 203          *
 204          * @return Title object of this page
 205          */
 206         public function getTitle() {
 207                 return $this->mPage->getTitle();
 208         }
 209
 210         /**
 211          * Get the WikiPage object of this instance
 212          *
 213          * @since 1.19
 214          * @return WikiPage
 215          */
 216         public function getPage() {
 217                 return $this->mPage;
 218         }
 219
 220         /**
 221          * Clear the object
 222          */
 223         public function clear() {
 224                 $this->mContentLoaded = false;
 225
 226                 $this->mRedirectedFrom = null; # Title object if set
 227                 $this->mRevIdFetched = 0;
 228                 $this->mRedirectUrl = false;
 229
 230                 $this->mPage->clear();
 231         }
 232
 233         /**
 234          * Note that getContent/loadContent do not follow redirects anymore.
 235          * If you need to fetch redirectable content easily, try
 236          * the shortcut in WikiPage::getRedirectTarget()
 237          *
 238          * This function has side effects! Do not use this function if you
 239          * only want the real revision text if any.
 240          *
 241          * @deprecated in 1.21; use WikiPage::getContent() instead
 242          *
 243          * @return string Return the text of this revision
 244          */
 245         public function getContent() {
 246                 ContentHandler::deprecated( __METHOD__, '1.21' );
 247                 $content = $this->getContentObject();
 248                 return ContentHandler::getContentText( $content );
 249         }
 250
 251         /**
 252          * Returns a Content object representing the pages effective display content,
 253          * not necessarily the revision's content!
 254          *
 255          * Note that getContent/loadContent do not follow redirects anymore.
 256          * If you need to fetch redirectable content easily, try
 257          * the shortcut in WikiPage::getRedirectTarget()
 258          *
 259          * This function has side effects! Do not use this function if you
 260          * only want the real revision text if any.
 261          *
 262          * @return Content Return the content of this revision
 263          *
 264          * @since 1.21
 265          */
 266         protected function getContentObject() {
 267                 wfProfileIn( __METHOD__ );
 268
 269                 if ( $this->mPage->getID() === 0 ) {
 270                         # If this is a MediaWiki:x message, then load the messages
 271                         # and return the message value for x.
 272                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 273                                 $text = $this->getTitle()->getDefaultMessageText();
 274                                 if ( $text === false ) {
 275                                         $text = '';
 276                                 }
 277
 278                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 279                         } else {
 280                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 281                                 $content = new MessageContent( $message, null, 'parsemag' );
 282                         }
 283                         wfProfileOut( __METHOD__ );
 284
 285                         return $content;
 286                 } else {
 287                         $this->fetchContentObject();
 288                         wfProfileOut( __METHOD__ );
 289
 290                         return $this->mContentObject;
 291                 }
 292         }
 293
 294         /**
 295          * @return int The oldid of the article that is to be shown, 0 for the
 296          *             current revision
 297          */
 298         public function getOldID() {
 299                 if ( is_null( $this->mOldId ) ) {
 300                         $this->mOldId = $this->getOldIDFromRequest();
 301                 }
 302
 303                 return $this->mOldId;
 304         }
 305
 306         /**
 307          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 308          *
 309          * @return int The old id for the request
 310          */
 311         public function getOldIDFromRequest() {
 312                 $this->mRedirectUrl = false;
 313
 314                 $request = $this->getContext()->getRequest();
 315                 $oldid = $request->getIntOrNull( 'oldid' );
 316
 317                 if ( $oldid === null ) {
 318                         return 0;
 319                 }
 320
 321                 if ( $oldid !== 0 ) {
 322                         # Load the given revision and check whether the page is another one.
 323                         # In that case, update this instance to reflect the change.
 324                         if ( $oldid === $this->mPage->getLatest() ) {
 325                                 $this->mRevision = $this->mPage->getRevision();
 326                         } else {
 327                                 $this->mRevision = Revision::newFromId( $oldid );
 328                                 if ( $this->mRevision !== null ) {
 329                                         // Revision title doesn't match the page title given?
 330                                         if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 331                                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 332                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 333                                         }
 334                                 }
 335                         }
 336                 }
 337
 338                 if ( $request->getVal( 'direction' ) == 'next' ) {
 339                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 340                         if ( $nextid ) {
 341                                 $oldid = $nextid;
 342                                 $this->mRevision = null;
 343                         } else {
 344                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 345                         }
 346                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 347                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 348                         if ( $previd ) {
 349                                 $oldid = $previd;
 350                                 $this->mRevision = null;
 351                         }
 352                 }
 353
 354                 return $oldid;
 355         }
 356
 357         /**
 358          * Load the revision (including text) into this object
 359          *
 360          * @deprecated in 1.19; use fetchContent()
 361          */
 362         function loadContent() {
 363                 wfDeprecated( __METHOD__, '1.19' );
 364                 $this->fetchContent();
 365         }
 366
 367         /**
 368          * Get text of an article from database
 369          * Does *NOT* follow redirects.
 370          *
 371          * @protected
 372          * @note this is really internal functionality that should really NOT be used by other functions. For accessing
 373          *       article content, use the WikiPage class, especially WikiBase::getContent(). However, a lot of legacy code
 374          *       uses this method to retrieve page text from the database, so the function has to remain public for now.
 375          *
 376          * @return mixed string containing article contents, or false if null
 377          * @deprecated in 1.21, use WikiPage::getContent() instead
 378          */
 379         function fetchContent() { #BC cruft!
 380                 ContentHandler::deprecated( __METHOD__, '1.21' );
 381
 382                 if ( $this->mContentLoaded && $this->mContent ) {
 383                         return $this->mContent;
 384                 }
 385
 386                 wfProfileIn( __METHOD__ );
 387
 388                 $content = $this->fetchContentObject();
 389
 390                 $this->mContent = ContentHandler::getContentText( $content ); #@todo: get rid of mContent everywhere!
 391                 ContentHandler::runLegacyHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 392
 393                 wfProfileOut( __METHOD__ );
 394
 395                 return $this->mContent;
 396         }
 397
 398
 399         /**
 400          * Get text content object
 401          * Does *NOT* follow redirects.
 402          * TODO: when is this null?
 403          *
 404          * @note code that wants to retrieve page content from the database should use WikiPage::getContent().
 405          *
 406          * @return Content|null
 407          *
 408          * @since 1.21
 409          */
 410         protected function fetchContentObject() {
 411                 if ( $this->mContentLoaded ) {
 412                         return $this->mContentObject;
 413                 }
 414
 415                 wfProfileIn( __METHOD__ );
 416
 417                 $this->mContentLoaded = true;
 418                 $this->mContent = null;
 419
 420                 $oldid = $this->getOldID();
 421
 422                 # Pre-fill content with error message so that if something
 423                 # fails we'll have something telling us what we intended.
 424                 //XXX: this isn't page content but a UI message. horrible.
 425                 $this->mContentObject = new MessageContent( 'missing-revision', array( $oldid ), array() ) ;
 426
 427                 if ( $oldid ) {
 428                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 429                         if ( !$this->mRevision ) {
 430                                 $this->mRevision = Revision::newFromId( $oldid );
 431                                 if ( !$this->mRevision ) {
 432                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 433                                         wfProfileOut( __METHOD__ );
 434                                         return false;
 435                                 }
 436                         }
 437                 } else {
 438                         if ( !$this->mPage->getLatest() ) {
 439                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 440                                 wfProfileOut( __METHOD__ );
 441                                 return false;
 442                         }
 443
 444                         $this->mRevision = $this->mPage->getRevision();
 445
 446                         if ( !$this->mRevision ) {
 447                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 448                                 wfProfileOut( __METHOD__ );
 449                                 return false;
 450                         }
 451                 }
 452
 453                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 454                 // We should instead work with the Revision object when we need it...
 455                 $this->mContentObject = $this->mRevision->getContent( Revision::FOR_THIS_USER, $this->getContext()->getUser() ); // Loads if user is allowed
 456                 $this->mRevIdFetched = $this->mRevision->getId();
 457
 458                 wfRunHooks( 'ArticleAfterFetchContentObject', array( &$this, &$this->mContentObject ) );
 459
 460                 wfProfileOut( __METHOD__ );
 461
 462                 return $this->mContentObject;
 463         }
 464
 465         /**
 466          * No-op
 467          * @deprecated since 1.18
 468          */
 469         public function forUpdate() {
 470                 wfDeprecated( __METHOD__, '1.18' );
 471         }
 472
 473         /**
 474          * Returns true if the currently-referenced revision is the current edit
 475          * to this page (and it exists).
 476          * @return bool
 477          */
 478         public function isCurrent() {
 479                 # If no oldid, this is the current version.
 480                 if ( $this->getOldID() == 0 ) {
 481                         return true;
 482                 }
 483
 484                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 485         }
 486
 487         /**
 488          * Get the fetched Revision object depending on request parameters or null
 489          * on failure.
 490          *
 491          * @since 1.19
 492          * @return Revision|null
 493          */
 494         public function getRevisionFetched() {
 495                 $this->fetchContentObject();
 496
 497                 return $this->mRevision;
 498         }
 499
 500         /**
 501          * Use this to fetch the rev ID used on page views
 502          *
 503          * @return int revision ID of last article revision
 504          */
 505         public function getRevIdFetched() {
 506                 if ( $this->mRevIdFetched ) {
 507                         return $this->mRevIdFetched;
 508                 } else {
 509                         return $this->mPage->getLatest();
 510                 }
 511         }
 512
 513         /**
 514          * This is the default action of the index.php entry point: just view the
 515          * page of the given title.
 516          */
 517         public function view() {
 518                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 519
 520                 wfProfileIn( __METHOD__ );
 521
 522                 # Get variables from query string
 523                 # As side effect this will load the revision and update the title
 524                 # in a revision ID is passed in the request, so this should remain
 525                 # the first call of this method even if $oldid is used way below.
 526                 $oldid = $this->getOldID();
 527
 528                 $user = $this->getContext()->getUser();
 529                 # Another whitelist check in case getOldID() is altering the title
 530                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 531                 if ( count( $permErrors ) ) {
 532                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 533                         wfProfileOut( __METHOD__ );
 534                         throw new PermissionsError( 'read', $permErrors );
 535                 }
 536
 537                 $outputPage = $this->getContext()->getOutput();
 538                 # getOldID() may as well want us to redirect somewhere else
 539                 if ( $this->mRedirectUrl ) {
 540                         $outputPage->redirect( $this->mRedirectUrl );
 541                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 542                         wfProfileOut( __METHOD__ );
 543
 544                         return;
 545                 }
 546
 547                 # If we got diff in the query, we want to see a diff page instead of the article.
 548                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 549                         wfDebug( __METHOD__ . ": showing diff page\n" );
 550                         $this->showDiffPage();
 551                         wfProfileOut( __METHOD__ );
 552
 553                         return;
 554                 }
 555
 556                 # Set page title (may be overridden by DISPLAYTITLE)
 557                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 558
 559                 $outputPage->setArticleFlag( true );
 560                 # Allow frames by default
 561                 $outputPage->allowClickjacking();
 562
 563                 $parserCache = ParserCache::singleton();
 564
 565                 $parserOptions = $this->getParserOptions();
 566                 # Render printable version, use printable version cache
 567                 if ( $outputPage->isPrintable() ) {
 568                         $parserOptions->setIsPrintable( true );
 569                         $parserOptions->setEditSection( false );
 570                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 571                         $parserOptions->setEditSection( false );
 572                 }
 573
 574                 # Try client and file cache
 575                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 576                         if ( $wgUseETag ) {
 577                                 $outputPage->setETag( $parserCache->getETag( $this, $parserOptions ) );
 578                         }
 579
 580                         # Is it client cached?
 581                         if ( $outputPage->checkLastModified( $this->mPage->getTouched() ) ) {
 582                                 wfDebug( __METHOD__ . ": done 304\n" );
 583                                 wfProfileOut( __METHOD__ );
 584
 585                                 return;
 586                         # Try file cache
 587                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 588                                 wfDebug( __METHOD__ . ": done file cache\n" );
 589                                 # tell wgOut that output is taken care of
 590                                 $outputPage->disable();
 591                                 $this->mPage->doViewUpdates( $user );
 592                                 wfProfileOut( __METHOD__ );
 593
 594                                 return;
 595                         }
 596                 }
 597
 598                 # Should the parser cache be used?
 599                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 600                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 601                 if ( $user->getStubThreshold() ) {
 602                         wfIncrStats( 'pcache_miss_stub' );
 603                 }
 604
 605                 $this->showRedirectedFromHeader();
 606                 $this->showNamespaceHeader();
 607
 608                 # Iterate through the possible ways of constructing the output text.
 609                 # Keep going until $outputDone is set, or we run out of things to do.
 610                 $pass = 0;
 611                 $outputDone = false;
 612                 $this->mParserOutput = false;
 613
 614                 while ( !$outputDone && ++$pass ) {
 615                         switch( $pass ) {
 616                                 case 1:
 617                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 618                                         break;
 619                                 case 2:
 620                                         # Early abort if the page doesn't exist
 621                                         if ( !$this->mPage->exists() ) {
 622                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 623                                                 $this->showMissingArticle();
 624                                                 wfProfileOut( __METHOD__ );
 625                                                 return;
 626                                         }
 627
 628                                         # Try the parser cache
 629                                         if ( $useParserCache ) {
 630                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 631
 632                                                 if ( $this->mParserOutput !== false ) {
 633                                                         if ( $oldid ) {
 634                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 635                                                                 $this->setOldSubtitle( $oldid );
 636                                                         } else {
 637                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 638                                                         }
 639                                                         $outputPage->addParserOutput( $this->mParserOutput );
 640                                                         # Ensure that UI elements requiring revision ID have
 641                                                         # the correct version information.
 642                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 643                                                         # Preload timestamp to avoid a DB hit
 644                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 645                                                         if ( $cachedTimestamp !== null ) {
 646                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 647                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 648                                                         }
 649                                                         $outputDone = true;
 650                                                 }
 651                                         }
 652                                         break;
 653                                 case 3:
 654                                         # This will set $this->mRevision if needed
 655                                         $this->fetchContentObject();
 656
 657                                         # Are we looking at an old revision
 658                                         if ( $oldid && $this->mRevision ) {
 659                                                 $this->setOldSubtitle( $oldid );
 660
 661                                                 if ( !$this->showDeletedRevisionHeader() ) {
 662                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 663                                                         wfProfileOut( __METHOD__ );
 664                                                         return;
 665                                                 }
 666                                         }
 667
 668                                         # Ensure that UI elements requiring revision ID have
 669                                         # the correct version information.
 670                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 671                                         # Preload timestamp to avoid a DB hit
 672                                         $outputPage->setRevisionTimestamp( $this->getTimestamp() );
 673
 674                                         # Pages containing custom CSS or JavaScript get special treatment
 675                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 676                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 677                                                 $this->showCssOrJsPage();
 678                                                 $outputDone = true;
 679                                         } elseif( !wfRunHooks( 'ArticleContentViewCustom',
 680                                                         array( $this->fetchContentObject(), $this->getTitle(), $outputPage ) ) ) {
 681
 682                                                 # Allow extensions do their own custom view for certain pages
 683                                                 $outputDone = true;
 684                                         } elseif( !ContentHandler::runLegacyHooks( 'ArticleViewCustom',
 685                                                         array( $this->fetchContentObject(), $this->getTitle(), $outputPage ) ) ) {
 686
 687                                                 # Allow extensions do their own custom view for certain pages
 688                                                 $outputDone = true;
 689                                         } else {
 690                                                 $content = $this->getContentObject();
 691                                                 $rt = $content ? $content->getRedirectChain() : null;
 692                                                 if ( $rt ) {
 693                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 694                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 695                                                         $outputPage->addHTML( $this->viewRedirect( $rt ) );
 696                                                         # Parse just to get categories, displaytitle, etc.
 697                                                         $this->mParserOutput = $content->getParserOutput( $this->getTitle(), $oldid, $parserOptions, false );
 698                                                         $outputPage->addParserOutputNoText( $this->mParserOutput );
 699                                                         $outputDone = true;
 700                                                 }
 701                                         }
 702                                         break;
 703                                 case 4:
 704                                         # Run the parse, protected by a pool counter
 705                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 706
 707                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 708                                                 $this->getRevIdFetched(), $useParserCache, $this->getContentObject() );
 709
 710                                         if ( !$poolArticleView->execute() ) {
 711                                                 $error = $poolArticleView->getError();
 712                                                 if ( $error ) {
 713                                                         $outputPage->clearHTML(); // for release() errors
 714                                                         $outputPage->enableClientCache( false );
 715                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 716
 717                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 718                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 719                                                 }
 720                                                 # Connection or timeout error
 721                                                 wfProfileOut( __METHOD__ );
 722                                                 return;
 723                                         }
 724
 725                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 726                                         $outputPage->addParserOutput( $this->mParserOutput );
 727
 728                                         # Don't cache a dirty ParserOutput object
 729                                         if ( $poolArticleView->getIsDirty() ) {
 730                                                 $outputPage->setSquidMaxage( 0 );
 731                                                 $outputPage->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 732                                         }
 733
 734                                         $outputDone = true;
 735                                         break;
 736                                 # Should be unreachable, but just in case...
 737                                 default:
 738                                         break 2;
 739                         }
 740                 }
 741
 742                 # Get the ParserOutput actually *displayed* here.
 743                 # Note that $this->mParserOutput is the *current* version output.
 744                 $pOutput = ( $outputDone instanceof ParserOutput )
 745                         ? $outputDone // object fetched by hook
 746                         : $this->mParserOutput;
 747
 748                 # Adjust title for main page & pages with displaytitle
 749                 if ( $pOutput ) {
 750                         $this->adjustDisplayTitle( $pOutput );
 751                 }
 752
 753                 # For the main page, overwrite the <title> element with the con-
 754                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 755                 # that's not empty).
 756                 # This message always exists because it is in the i18n files
 757                 if ( $this->getTitle()->isMainPage() ) {
 758                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 759                         if ( !$msg->isDisabled() ) {
 760                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 761                         }
 762                 }
 763
 764                 # Check for any __NOINDEX__ tags on the page using $pOutput
 765                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 766                 $outputPage->setIndexPolicy( $policy['index'] );
 767                 $outputPage->setFollowPolicy( $policy['follow'] );
 768
 769                 $this->showViewFooter();
 770                 $this->mPage->doViewUpdates( $user );
 771
 772                 wfProfileOut( __METHOD__ );
 773         }
 774
 775         /**
 776          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 777          * @param $pOutput ParserOutput
 778          */
 779         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 780                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 781                 $titleText = $pOutput->getTitleText();
 782                 if ( strval( $titleText ) !== '' ) {
 783                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 784                 }
 785         }
 786
 787         /**
 788          * Show a diff page according to current request variables. For use within
 789          * Article::view() only, other callers should use the DifferenceEngine class.
 790          *
 791          * @todo: make protected
 792          */
 793         public function showDiffPage() {
 794                 $request = $this->getContext()->getRequest();
 795                 $user = $this->getContext()->getUser();
 796                 $diff = $request->getVal( 'diff' );
 797                 $rcid = $request->getVal( 'rcid' );
 798                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 799                 $purge = $request->getVal( 'action' ) == 'purge';
 800                 $unhide = $request->getInt( 'unhide' ) == 1;
 801                 $oldid = $this->getOldID();
 802
 803                 $rev = $this->getRevisionFetched();
 804
 805                 if ( !$rev ) {
 806                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 807                         $this->getContext()->getOutput()->addWikiMsg( 'difference-missing-revision', $oldid, 1 );
 808                         return;
 809                 }
 810
 811                 $contentHandler = $rev->getContentHandler();
 812                 $de = $contentHandler->createDifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 813
 814                 // DifferenceEngine directly fetched the revision:
 815                 $this->mRevIdFetched = $de->mNewid;
 816                 $de->showDiffPage( $diffOnly );
 817
 818                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 819                         # Run view updates for current revision only
 820                         $this->mPage->doViewUpdates( $user );
 821                 }
 822         }
 823
 824         /**
 825          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 826          * Article::view() only.
 827          *
 828          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 829          * page views.
 830          *
 831          * @param bool $showCacheHint whether to show a message telling the user to clear the browser cache (default: true).
 832          */
 833         protected function showCssOrJsPage( $showCacheHint = true ) {
 834                 $outputPage = $this->getContext()->getOutput();
 835
 836                 if ( $showCacheHint ) {
 837                         $dir = $this->getContext()->getLanguage()->getDir();
 838                         $lang = $this->getContext()->getLanguage()->getCode();
 839
 840                         $outputPage->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 841                                 'clearyourcache' );
 842                 }
 843
 844                 $this->fetchContentObject();
 845
 846                 if ( $this->mContentObject ) {
 847                         // Give hooks a chance to customise the output
 848                         if ( ContentHandler::runLegacyHooks( 'ShowRawCssJs', array( $this->mContentObject, $this->getTitle(), $outputPage ) ) ) {
 849                                 $po = $this->mContentObject->getParserOutput( $this->getTitle() );
 850                                 $outputPage->addHTML( $po->getText() );
 851                         }
 852                 }
 853         }
 854
 855         /**
 856          * Get the robot policy to be used for the current view
 857          * @param $action String the action= GET parameter
 858          * @param $pOutput ParserOutput
 859          * @return Array the policy that should be set
 860          * TODO: actions other than 'view'
 861          */
 862         public function getRobotPolicy( $action, $pOutput ) {
 863                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 864
 865                 $ns = $this->getTitle()->getNamespace();
 866
 867                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 868                         # Don't index user and user talk pages for blocked users (bug 11443)
 869                         if ( !$this->getTitle()->isSubpage() ) {
 870                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 871                                         return array(
 872                                                 'index'  => 'noindex',
 873                                                 'follow' => 'nofollow'
 874                                         );
 875                                 }
 876                         }
 877                 }
 878
 879                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 880                         # Non-articles (special pages etc), and old revisions
 881                         return array(
 882                                 'index'  => 'noindex',
 883                                 'follow' => 'nofollow'
 884                         );
 885                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 886                         # Discourage indexing of printable versions, but encourage following
 887                         return array(
 888                                 'index'  => 'noindex',
 889                                 'follow' => 'follow'
 890                         );
 891                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 892                         # For ?curid=x urls, disallow indexing
 893                         return array(
 894                                 'index'  => 'noindex',
 895                                 'follow' => 'follow'
 896                         );
 897                 }
 898
 899                 # Otherwise, construct the policy based on the various config variables.
 900                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 901
 902                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 903                         # Honour customised robot policies for this namespace
 904                         $policy = array_merge(
 905                                 $policy,
 906                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 907                         );
 908                 }
 909                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 910                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 911                         # a final sanity check that we have really got the parser output.
 912                         $policy = array_merge(
 913                                 $policy,
 914                                 array( 'index' => $pOutput->getIndexPolicy() )
 915                         );
 916                 }
 917
 918                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 919                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 920                         $policy = array_merge(
 921                                 $policy,
 922                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 923                         );
 924                 }
 925
 926                 return $policy;
 927         }
 928
 929         /**
 930          * Converts a String robot policy into an associative array, to allow
 931          * merging of several policies using array_merge().
 932          * @param $policy Mixed, returns empty array on null/false/'', transparent
 933          *            to already-converted arrays, converts String.
 934          * @return Array: 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 935          */
 936         public static function formatRobotPolicy( $policy ) {
 937                 if ( is_array( $policy ) ) {
 938                         return $policy;
 939                 } elseif ( !$policy ) {
 940                         return array();
 941                 }
 942
 943                 $policy = explode( ',', $policy );
 944                 $policy = array_map( 'trim', $policy );
 945
 946                 $arr = array();
 947                 foreach ( $policy as $var ) {
 948                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 949                                 $arr['index'] = $var;
 950                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 951                                 $arr['follow'] = $var;
 952                         }
 953                 }
 954
 955                 return $arr;
 956         }
 957
 958         /**
 959          * If this request is a redirect view, send "redirected from" subtitle to
 960          * the output. Returns true if the header was needed, false if this is not
 961          * a redirect view. Handles both local and remote redirects.
 962          *
 963          * @return boolean
 964          */
 965         public function showRedirectedFromHeader() {
 966                 global $wgRedirectSources;
 967                 $outputPage = $this->getContext()->getOutput();
 968
 969                 $rdfrom = $this->getContext()->getRequest()->getVal( 'rdfrom' );
 970
 971                 if ( isset( $this->mRedirectedFrom ) ) {
 972                         // This is an internally redirected page view.
 973                         // We'll need a backlink to the source page for navigation.
 974                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 975                                 $redir = Linker::linkKnown(
 976                                         $this->mRedirectedFrom,
 977                                         null,
 978                                         array(),
 979                                         array( 'redirect' => 'no' )
 980                                 );
 981
 982                                 $outputPage->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 983
 984                                 // Set the fragment if one was specified in the redirect
 985                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 986                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 987                                         $outputPage->addInlineScript( "redirectToFragment(\"$fragment\");" );
 988                                 }
 989
 990                                 // Add a <link rel="canonical"> tag
 991                                 $outputPage->setCanonicalUrl( $this->getTitle()->getLocalURL() );
 992
 993                                 // Tell the output object that the user arrived at this article through a redirect
 994                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 995
 996                                 return true;
 997                         }
 998                 } elseif ( $rdfrom ) {
 999                         // This is an externally redirected view, from some other wiki.
1000                         // If it was reported from a trusted site, supply a backlink.
1001                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
1002                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
1003                                 $outputPage->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
1004
1005                                 return true;
1006                         }
1007                 }
1008
1009                 return false;
1010         }
1011
1012         /**
1013          * Show a header specific to the namespace currently being viewed, like
1014          * [[MediaWiki:Talkpagetext]]. For Article::view().
1015          */
1016         public function showNamespaceHeader() {
1017                 if ( $this->getTitle()->isTalkPage() ) {
1018                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1019                                 $this->getContext()->getOutput()->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
1020                         }
1021                 }
1022         }
1023
1024         /**
1025          * Show the footer section of an ordinary page view
1026          */
1027         public function showViewFooter() {
1028                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1029                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
1030                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1031                 }
1032
1033                 # If we have been passed an &rcid= parameter, we want to give the user a
1034                 # chance to mark this new article as patrolled.
1035                 $this->showPatrolFooter();
1036
1037                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
1038
1039         }
1040
1041         /**
1042          * If patrol is possible, output a patrol UI box. This is called from the
1043          * footer section of ordinary page views. If patrol is not possible or not
1044          * desired, does nothing.
1045          * Side effect: When the patrol link is build, this method will call
1046          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1047          */
1048         public function showPatrolFooter() {
1049                 $request = $this->getContext()->getRequest();
1050                 $outputPage = $this->getContext()->getOutput();
1051                 $user = $this->getContext()->getUser();
1052                 $rcid = $request->getVal( 'rcid' );
1053
1054                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol', $user ) ) {
1055                         return;
1056                 }
1057
1058                 $token = $user->getEditToken( $rcid );
1059
1060                 $outputPage->preventClickjacking();
1061                 $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1062
1063                 $link = Linker::linkKnown(
1064                         $this->getTitle(),
1065                         wfMessage( 'markaspatrolledtext' )->escaped(),
1066                         array(),
1067                         array(
1068                                 'action' => 'markpatrolled',
1069                                 'rcid' => $rcid,
1070                                 'token' => $token,
1071                         )
1072                 );
1073
1074                 $outputPage->addHTML(
1075                         "<div class='patrollink'>" .
1076                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1077                         '</div>'
1078                 );
1079         }
1080
1081         /**
1082          * Show the error text for a missing article. For articles in the MediaWiki
1083          * namespace, show the default message text. To be called from Article::view().
1084          */
1085         public function showMissingArticle() {
1086                 global $wgSend404Code;
1087                 $outputPage = $this->getContext()->getOutput();
1088
1089                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1090                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
1091                         $parts = explode( '/', $this->getTitle()->getText() );
1092                         $rootPart = $parts[0];
1093                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1094                         $ip = User::isIP( $rootPart );
1095
1096                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1097                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1098                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1099                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1100                                 LogEventsList::showLogExtract(
1101                                         $outputPage,
1102                                         'block',
1103                                         $user->getUserPage(),
1104                                         '',
1105                                         array(
1106                                                 'lim' => 1,
1107                                                 'showIfEmpty' => false,
1108                                                 'msgKey' => array(
1109                                                         'blocked-notice-logextract',
1110                                                         $user->getName() # Support GENDER in notice
1111                                                 )
1112                                         )
1113                                 );
1114                         }
1115                 }
1116
1117                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1118
1119                 # Show delete and move logs
1120                 LogEventsList::showLogExtract( $outputPage, array( 'delete', 'move' ), $this->getTitle(), '',
1121                         array(  'lim' => 10,
1122                                 'conds' => array( "log_action != 'revision'" ),
1123                                 'showIfEmpty' => false,
1124                                 'msgKey' => array( 'moveddeleted-notice' ) )
1125                 );
1126
1127                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1128                         // If there's no backing content, send a 404 Not Found
1129                         // for better machine handling of broken links.
1130                         $this->getContext()->getRequest()->response()->header( "HTTP/1.1 404 Not Found" );
1131                 }
1132
1133                 $hookResult = wfRunHooks( 'BeforeDisplayNoArticleText', array( $this ) );
1134
1135                 if ( ! $hookResult ) {
1136                         return;
1137                 }
1138
1139                 # Show error message
1140                 $oldid = $this->getOldID();
1141                 if ( $oldid ) {
1142                         $text = wfMessage( 'missing-revision', $oldid )->plain();
1143                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1144                         // Use the default message text
1145                         $text = $this->getTitle()->getDefaultMessageText();
1146                 } elseif ( $this->getTitle()->quickUserCan( 'create', $this->getContext()->getUser() )
1147                         && $this->getTitle()->quickUserCan( 'edit', $this->getContext()->getUser() )
1148                 ) {
1149                         $text = wfMessage( 'noarticletext' )->plain();
1150                 } else {
1151                         $text = wfMessage( 'noarticletext-nopermission' )->plain();
1152                 }
1153                 $text = "<div class='noarticletext'>\n$text\n</div>";
1154
1155                 $outputPage->addWikiText( $text );
1156         }
1157
1158         /**
1159          * If the revision requested for view is deleted, check permissions.
1160          * Send either an error message or a warning header to the output.
1161          *
1162          * @return boolean true if the view is allowed, false if not.
1163          */
1164         public function showDeletedRevisionHeader() {
1165                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1166                         // Not deleted
1167                         return true;
1168                 }
1169
1170                 $outputPage = $this->getContext()->getOutput();
1171                 $user = $this->getContext()->getUser();
1172                 // If the user is not allowed to see it...
1173                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1174                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1175                                 'rev-deleted-text-permission' );
1176
1177                         return false;
1178                 // If the user needs to confirm that they want to see it...
1179                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1180                         # Give explanation and add a link to view the revision...
1181                         $oldid = intval( $this->getOldID() );
1182                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1183                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1184                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1185                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1186                                 array( $msg, $link ) );
1187
1188                         return false;
1189                 // We are allowed to see...
1190                 } else {
1191                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1192                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1193                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1194
1195                         return true;
1196                 }
1197         }
1198
1199         /**
1200          * Generate the navigation links when browsing through an article revisions
1201          * It shows the information as:
1202          *   Revision as of \<date\>; view current revision
1203          *   \<- Previous version | Next Version -\>
1204          *
1205          * @param $oldid int: revision ID of this article revision
1206          */
1207         public function setOldSubtitle( $oldid = 0 ) {
1208                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1209                         return;
1210                 }
1211
1212                 $unhide = $this->getContext()->getRequest()->getInt( 'unhide' ) == 1;
1213
1214                 # Cascade unhide param in links for easy deletion browsing
1215                 $extraParams = array();
1216                 if ( $unhide ) {
1217                         $extraParams['unhide'] = 1;
1218                 }
1219
1220                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1221                         $revision = $this->mRevision;
1222                 } else {
1223                         $revision = Revision::newFromId( $oldid );
1224                 }
1225
1226                 $timestamp = $revision->getTimestamp();
1227
1228                 $current = ( $oldid == $this->mPage->getLatest() );
1229                 $language = $this->getContext()->getLanguage();
1230                 $user = $this->getContext()->getUser();
1231
1232                 $td = $language->userTimeAndDate( $timestamp, $user );
1233                 $tddate = $language->userDate( $timestamp, $user );
1234                 $tdtime = $language->userTime( $timestamp, $user );
1235
1236                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1237                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1238
1239                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1240                         ? 'revision-info-current'
1241                         : 'revision-info';
1242
1243                 $outputPage = $this->getContext()->getOutput();
1244                 $outputPage->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1245                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1246                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1247
1248                 $lnk = $current
1249                         ? wfMessage( 'currentrevisionlink' )->escaped()
1250                         : Linker::linkKnown(
1251                                 $this->getTitle(),
1252                                 wfMessage( 'currentrevisionlink' )->escaped(),
1253                                 array(),
1254                                 $extraParams
1255                         );
1256                 $curdiff = $current
1257                         ? wfMessage( 'diff' )->escaped()
1258                         : Linker::linkKnown(
1259                                 $this->getTitle(),
1260                                 wfMessage( 'diff' )->escaped(),
1261                                 array(),
1262                                 array(
1263                                         'diff' => 'cur',
1264                                         'oldid' => $oldid
1265                                 ) + $extraParams
1266                         );
1267                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1268                 $prevlink = $prev
1269                         ? Linker::linkKnown(
1270                                 $this->getTitle(),
1271                                 wfMessage( 'previousrevision' )->escaped(),
1272                                 array(),
1273                                 array(
1274                                         'direction' => 'prev',
1275                                         'oldid' => $oldid
1276                                 ) + $extraParams
1277                         )
1278                         : wfMessage( 'previousrevision' )->escaped();
1279                 $prevdiff = $prev
1280                         ? Linker::linkKnown(
1281                                 $this->getTitle(),
1282                                 wfMessage( 'diff' )->escaped(),
1283                                 array(),
1284                                 array(
1285                                         'diff' => 'prev',
1286                                         'oldid' => $oldid
1287                                 ) + $extraParams
1288                         )
1289                         : wfMessage( 'diff' )->escaped();
1290                 $nextlink = $current
1291                         ? wfMessage( 'nextrevision' )->escaped()
1292                         : Linker::linkKnown(
1293                                 $this->getTitle(),
1294                                 wfMessage( 'nextrevision' )->escaped(),
1295                                 array(),
1296                                 array(
1297                                         'direction' => 'next',
1298                                         'oldid' => $oldid
1299                                 ) + $extraParams
1300                         );
1301                 $nextdiff = $current
1302                         ? wfMessage( 'diff' )->escaped()
1303                         : Linker::linkKnown(
1304                                 $this->getTitle(),
1305                                 wfMessage( 'diff' )->escaped(),
1306                                 array(),
1307                                 array(
1308                                         'diff' => 'next',
1309                                         'oldid' => $oldid
1310                                 ) + $extraParams
1311                         );
1312
1313                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1314                 if ( $cdel !== '' ) {
1315                         $cdel .= ' ';
1316                 }
1317
1318                 $outputPage->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1319                         wfMessage( 'revision-nav' )->rawParams(
1320                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1321                         )->escaped() . "</div>" );
1322         }
1323
1324         /**
1325          * View redirect
1326          *
1327          * @param $target Title|Array of destination(s) to redirect
1328          * @param $appendSubtitle Boolean [optional]
1329          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1330          * @return string containing HMTL with redirect link
1331          */
1332         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1333                 global $wgStylePath;
1334
1335                 if ( !is_array( $target ) ) {
1336                         $target = array( $target );
1337                 }
1338
1339                 $lang = $this->getTitle()->getPageLanguage();
1340                 $imageDir = $lang->getDir();
1341
1342                 if ( $appendSubtitle ) {
1343                         $out = $this->getContext()->getOutput();
1344                         $out->addSubtitle( wfMessage( 'redirectpagesub' )->escaped() );
1345                 }
1346
1347                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1348
1349                 /**
1350                  * @var $title Title
1351                  */
1352                 $title = array_shift( $target );
1353
1354                 if ( $forceKnown ) {
1355                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1356                 } else {
1357                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1358                 }
1359
1360                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1361                 $alt = $lang->isRTL() ? '←' : '→';
1362                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1363                 foreach ( $target as $rt ) {
1364                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1365                         if ( $forceKnown ) {
1366                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1367                         } else {
1368                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1369                         }
1370                 }
1371
1372                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1373                 return '<div class="redirectMsg">' .
1374                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1375                         '<span class="redirectText">' . $link . '</span></div>';
1376         }
1377
1378         /**
1379          * Handle action=render
1380          */
1381         public function render() {
1382                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1383                 $this->view();
1384         }
1385
1386         /**
1387          * action=protect handler
1388          */
1389         public function protect() {
1390                 $form = new ProtectionForm( $this );
1391                 $form->execute();
1392         }
1393
1394         /**
1395          * action=unprotect handler (alias)
1396          */
1397         public function unprotect() {
1398                 $this->protect();
1399         }
1400
1401         /**
1402          * UI entry point for page deletion
1403          */
1404         public function delete() {
1405                 # This code desperately needs to be totally rewritten
1406
1407                 $title = $this->getTitle();
1408                 $user = $this->getContext()->getUser();
1409
1410                 # Check permissions
1411                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1412                 if ( count( $permission_errors ) ) {
1413                         throw new PermissionsError( 'delete', $permission_errors );
1414                 }
1415
1416                 # Read-only check...
1417                 if ( wfReadOnly() ) {
1418                         throw new ReadOnlyError;
1419                 }
1420
1421                 # Better double-check that it hasn't been deleted yet!
1422                 $this->mPage->loadPageData( 'fromdbmaster' );
1423                 if ( !$this->mPage->exists() ) {
1424                         $deleteLogPage = new LogPage( 'delete' );
1425                         $outputPage = $this->getContext()->getOutput();
1426                         $outputPage->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1427                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1428                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1429                                 );
1430                         $outputPage->addHTML(
1431                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1432                         );
1433                         LogEventsList::showLogExtract(
1434                                 $outputPage,
1435                                 'delete',
1436                                 $title
1437                         );
1438
1439                         return;
1440                 }
1441
1442                 $request = $this->getContext()->getRequest();
1443                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1444                 $deleteReason = $request->getText( 'wpReason' );
1445
1446                 if ( $deleteReasonList == 'other' ) {
1447                         $reason = $deleteReason;
1448                 } elseif ( $deleteReason != '' ) {
1449                         // Entry from drop down menu + additional comment
1450                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1451                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1452                 } else {
1453                         $reason = $deleteReasonList;
1454                 }
1455
1456                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1457                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1458                 {
1459                         # Flag to hide all contents of the archived revisions
1460                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1461
1462                         $this->doDelete( $reason, $suppress );
1463
1464                         if ( $user->isLoggedIn() && $request->getCheck( 'wpWatch' ) != $user->isWatched( $title ) ) {
1465                                 if ( $request->getCheck( 'wpWatch' ) ) {
1466                                         WatchAction::doWatch( $title, $user );
1467                                 } else {
1468                                         WatchAction::doUnwatch( $title, $user );
1469                                 }
1470                         }
1471
1472                         return;
1473                 }
1474
1475                 // Generate deletion reason
1476                 $hasHistory = false;
1477                 if ( !$reason ) {
1478                         try {
1479                                 $reason = $this->generateReason( $hasHistory );
1480                         } catch ( MWException $e ) {
1481                                 # if a page is horribly broken, we still want to be able to delete it. so be lenient about errors here.
1482                                 wfDebug("Error while building auto delete summary: $e");
1483                                 $reason = '';
1484                         }
1485                 }
1486
1487                 // If the page has a history, insert a warning
1488                 if ( $hasHistory ) {
1489                         $revisions = $this->mTitle->estimateRevisionCount();
1490                         // @todo FIXME: i18n issue/patchwork message
1491                         $this->getContext()->getOutput()->addHTML( '<strong class="mw-delete-warning-revisions">' .
1492                                 wfMessage( 'historywarning' )->numParams( $revisions )->parse() .
1493                                 wfMessage( 'word-separator' )->plain() . Linker::linkKnown( $title,
1494                                         wfMessage( 'history' )->escaped(),
1495                                         array( 'rel' => 'archives' ),
1496                                         array( 'action' => 'history' ) ) .
1497                                 '</strong>'
1498                         );
1499
1500                         if ( $this->mTitle->isBigDeletion() ) {
1501                                 global $wgDeleteRevisionsLimit;
1502                                 $this->getContext()->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1503                                         array( 'delete-warning-toobig', $this->getContext()->getLanguage()->formatNum( $wgDeleteRevisionsLimit ) ) );
1504                         }
1505                 }
1506
1507                 $this->confirmDelete( $reason );
1508         }
1509
1510         /**
1511          * Output deletion confirmation dialog
1512          * @todo FIXME: Move to another file?
1513          * @param $reason String: prefilled reason
1514          */
1515         public function confirmDelete( $reason ) {
1516                 wfDebug( "Article::confirmDelete\n" );
1517
1518                 $outputPage = $this->getContext()->getOutput();
1519                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1520                 $outputPage->addBacklinkSubtitle( $this->getTitle() );
1521                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1522                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1523
1524                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $outputPage, &$reason ) );
1525
1526                 $user = $this->getContext()->getUser();
1527
1528                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1529                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1530                                         <td></td>
1531                                         <td class='mw-input'><strong>" .
1532                                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1533                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1534                                         "</strong></td>
1535                                 </tr>";
1536                 } else {
1537                         $suppress = '';
1538                 }
1539                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $this->getTitle() );
1540
1541                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1542                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1543                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1544                         Xml::tags( 'legend', null, wfMessage( 'delete-legend' )->escaped() ) .
1545                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1546                         "<tr id=\"wpDeleteReasonListRow\">
1547                                 <td class='mw-label'>" .
1548                                         Xml::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1549                                 "</td>
1550                                 <td class='mw-input'>" .
1551                                         Xml::listDropDown( 'wpDeleteReasonList',
1552                                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1553                                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(), '', 'wpReasonDropDown', 1 ) .
1554                                 "</td>
1555                         </tr>
1556                         <tr id=\"wpDeleteReasonRow\">
1557                                 <td class='mw-label'>" .
1558                                         Xml::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1559                                 "</td>
1560                                 <td class='mw-input'>" .
1561                                 Html::input( 'wpReason', $reason, 'text', array(
1562                                         'size' => '60',
1563                                         'maxlength' => '255',
1564                                         'tabindex' => '2',
1565                                         'id' => 'wpReason',
1566                                         'autofocus'
1567                                 ) ) .
1568                                 "</td>
1569                         </tr>";
1570
1571                 # Disallow watching if user is not logged in
1572                 if ( $user->isLoggedIn() ) {
1573                         $form .= "
1574                         <tr>
1575                                 <td></td>
1576                                 <td class='mw-input'>" .
1577                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1578                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1579                                 "</td>
1580                         </tr>";
1581                 }
1582
1583                 $form .= "
1584                         $suppress
1585                         <tr>
1586                                 <td></td>
1587                                 <td class='mw-submit'>" .
1588                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1589                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1590                                 "</td>
1591                         </tr>" .
1592                         Xml::closeElement( 'table' ) .
1593                         Xml::closeElement( 'fieldset' ) .
1594                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1595                         Xml::closeElement( 'form' );
1596
1597                         if ( $user->isAllowed( 'editinterface' ) ) {
1598                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1599                                 $link = Linker::link(
1600                                         $title,
1601                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1602                                         array(),
1603                                         array( 'action' => 'edit' )
1604                                 );
1605                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1606                         }
1607
1608                 $outputPage->addHTML( $form );
1609
1610                 $deleteLogPage = new LogPage( 'delete' );
1611                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1612                 LogEventsList::showLogExtract( $outputPage, 'delete',
1613                         $this->getTitle()
1614                 );
1615         }
1616
1617         /**
1618          * Perform a deletion and output success or failure messages
1619          * @param $reason
1620          * @param $suppress bool
1621          */
1622         public function doDelete( $reason, $suppress = false ) {
1623                 $error = '';
1624                 $outputPage = $this->getContext()->getOutput();
1625                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error );
1626                 if ( $status->isGood() ) {
1627                         $deleted = $this->getTitle()->getPrefixedText();
1628
1629                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1630                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1631
1632                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1633
1634                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1635                         $outputPage->returnToMain( false );
1636                 } else {
1637                         $outputPage->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1638                         if ( $error == '' ) {
1639                                 $outputPage->addWikiText(
1640                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1641                                 );
1642                                 $deleteLogPage = new LogPage( 'delete' );
1643                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1644
1645                                 LogEventsList::showLogExtract(
1646                                         $outputPage,
1647                                         'delete',
1648                                         $this->getTitle()
1649                                 );
1650                         } else {
1651                                 $outputPage->addHTML( $error );
1652                         }
1653                 }
1654         }
1655
1656         /* Caching functions */
1657
1658         /**
1659          * checkLastModified returns true if it has taken care of all
1660          * output to the client that is necessary for this request.
1661          * (that is, it has sent a cached version of the page)
1662          *
1663          * @return boolean true if cached version send, false otherwise
1664          */
1665         protected function tryFileCache() {
1666                 static $called = false;
1667
1668                 if ( $called ) {
1669                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1670                         return false;
1671                 }
1672
1673                 $called = true;
1674                 if ( $this->isFileCacheable() ) {
1675                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1676                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1677                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1678                                 $cache->loadFromFileCache( $this->getContext() );
1679                                 return true;
1680                         } else {
1681                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1682                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1683                         }
1684                 } else {
1685                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1686                 }
1687
1688                 return false;
1689         }
1690
1691         /**
1692          * Check if the page can be cached
1693          * @return bool
1694          */
1695         public function isFileCacheable() {
1696                 $cacheable = false;
1697
1698                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1699                         $cacheable = $this->mPage->getID()
1700                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1701                         // Extension may have reason to disable file caching on some pages.
1702                         if ( $cacheable ) {
1703                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1704                         }
1705                 }
1706
1707                 return $cacheable;
1708         }
1709
1710         /**#@-*/
1711
1712         /**
1713          * Lightweight method to get the parser output for a page, checking the parser cache
1714          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1715          * consider, so it's not appropriate to use there.
1716          *
1717          * @since 1.16 (r52326) for LiquidThreads
1718          *
1719          * @param $oldid mixed integer Revision ID or null
1720          * @param $user User The relevant user
1721          * @return ParserOutput or false if the given revsion ID is not found
1722          */
1723         public function getParserOutput( $oldid = null, User $user = null ) {
1724                 //XXX: bypasses mParserOptions and thus setParserOptions()
1725
1726                 if ( $user === null ) {
1727                         $parserOptions = $this->getParserOptions();
1728                 } else {
1729                         $parserOptions = $this->mPage->makeParserOptions( $user );
1730                 }
1731
1732                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1733         }
1734
1735         /**
1736          * Override the ParserOptions used to render the primary article wikitext.
1737          *
1738          * @param ParserOptions $options
1739          * @throws MWException if the parser options where already initialized.
1740          */
1741         public function setParserOptions( ParserOptions $options ) {
1742                 if ( $this->mParserOptions ) {
1743                         throw new MWException( "can't change parser options after they have already been set" );
1744                 }
1745
1746                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1747                 $this->mParserOptions = clone $options;
1748         }
1749
1750         /**
1751          * Get parser options suitable for rendering the primary article wikitext
1752          * @return ParserOptions
1753          */
1754         public function getParserOptions() {
1755                 if ( !$this->mParserOptions ) {
1756                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
1757                 }
1758                 // Clone to allow modifications of the return value without affecting cache
1759                 return clone $this->mParserOptions;
1760         }
1761
1762         /**
1763          * Sets the context this Article is executed in
1764          *
1765          * @param $context IContextSource
1766          * @since 1.18
1767          */
1768         public function setContext( $context ) {
1769                 $this->mContext = $context;
1770         }
1771
1772         /**
1773          * Gets the context this Article is executed in
1774          *
1775          * @return IContextSource
1776          * @since 1.18
1777          */
1778         public function getContext() {
1779                 if ( $this->mContext instanceof IContextSource ) {
1780                         return $this->mContext;
1781                 } else {
1782                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1783                         return RequestContext::getMain();
1784                 }
1785         }
1786
1787         /**
1788          * Info about this page
1789          * @deprecated since 1.19
1790          */
1791         public function info() {
1792                 wfDeprecated( __METHOD__, '1.19' );
1793                 Action::factory( 'info', $this )->show();
1794         }
1795
1796         /**
1797          * Mark this particular edit/page as patrolled
1798          * @deprecated since 1.18
1799          */
1800         public function markpatrolled() {
1801                 wfDeprecated( __METHOD__, '1.18' );
1802                 Action::factory( 'markpatrolled', $this )->show();
1803         }
1804
1805         /**
1806          * Handle action=purge
1807          * @deprecated since 1.19
1808          * @return Action|bool|null false if the action is disabled, null if it is not recognised
1809          */
1810         public function purge() {
1811                 return Action::factory( 'purge', $this )->show();
1812         }
1813
1814         /**
1815          * Handle action=revert
1816          * @deprecated since 1.19
1817          */
1818         public function revert() {
1819                 wfDeprecated( __METHOD__, '1.19' );
1820                 Action::factory( 'revert', $this )->show();
1821         }
1822
1823         /**
1824          * Handle action=rollback
1825          * @deprecated since 1.19
1826          */
1827         public function rollback() {
1828                 wfDeprecated( __METHOD__, '1.19' );
1829                 Action::factory( 'rollback', $this )->show();
1830         }
1831
1832         /**
1833          * User-interface handler for the "watch" action.
1834          * Requires Request to pass a token as of 1.18.
1835          * @deprecated since 1.18
1836          */
1837         public function watch() {
1838                 wfDeprecated( __METHOD__, '1.18' );
1839                 Action::factory( 'watch', $this )->show();
1840         }
1841
1842         /**
1843          * Add this page to the current user's watchlist
1844          *
1845          * This is safe to be called multiple times
1846          *
1847          * @return bool true on successful watch operation
1848          * @deprecated since 1.18
1849          */
1850         public function doWatch() {
1851                 wfDeprecated( __METHOD__, '1.18' );
1852                 return WatchAction::doWatch( $this->getTitle(), $this->getContext()->getUser() );
1853         }
1854
1855         /**
1856          * User interface handler for the "unwatch" action.
1857          * Requires Request to pass a token as of 1.18.
1858          * @deprecated since 1.18
1859          */
1860         public function unwatch() {
1861                 wfDeprecated( __METHOD__, '1.18' );
1862                 Action::factory( 'unwatch', $this )->show();
1863         }
1864
1865         /**
1866          * Stop watching a page
1867          * @return bool true on successful unwatch
1868          * @deprecated since 1.18
1869          */
1870         public function doUnwatch() {
1871                 wfDeprecated( __METHOD__, '1.18' );
1872                 return WatchAction::doUnwatch( $this->getTitle(), $this->getContext()->getUser() );
1873         }
1874
1875         /**
1876          * Output a redirect back to the article.
1877          * This is typically used after an edit.
1878          *
1879          * @deprecated in 1.18; call OutputPage::redirect() directly
1880          * @param $noRedir Boolean: add redirect=no
1881          * @param $sectionAnchor String: section to redirect to, including "#"
1882          * @param $extraQuery String: extra query params
1883          */
1884         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1885                 wfDeprecated( __METHOD__, '1.18' );
1886                 if ( $noRedir ) {
1887                         $query = 'redirect=no';
1888                         if ( $extraQuery ) {
1889                                 $query .= "&$extraQuery";
1890                         }
1891                 } else {
1892                         $query = $extraQuery;
1893                 }
1894
1895                 $this->getContext()->getOutput()->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1896         }
1897
1898         /**
1899          * Use PHP's magic __get handler to handle accessing of
1900          * raw WikiPage fields for backwards compatibility.
1901          *
1902          * @param $fname String Field name
1903          */
1904         public function __get( $fname ) {
1905                 if ( property_exists( $this->mPage, $fname ) ) {
1906                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1907                         return $this->mPage->$fname;
1908                 }
1909                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1910         }
1911
1912         /**
1913          * Use PHP's magic __set handler to handle setting of
1914          * raw WikiPage fields for backwards compatibility.
1915          *
1916          * @param $fname String Field name
1917          * @param $fvalue mixed New value
1918          */
1919         public function __set( $fname, $fvalue ) {
1920                 if ( property_exists( $this->mPage, $fname ) ) {
1921                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1922                         $this->mPage->$fname = $fvalue;
1923                 // Note: extensions may want to toss on new fields
1924                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1925                         $this->mPage->$fname = $fvalue;
1926                 } else {
1927                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1928                 }
1929         }
1930
1931         /**
1932          * Use PHP's magic __call handler to transform instance calls to
1933          * WikiPage functions for backwards compatibility.
1934          *
1935          * @param $fname String Name of called method
1936          * @param $args Array Arguments to the method
1937          * @return mixed
1938          */
1939         public function __call( $fname, $args ) {
1940                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1941                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1942                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1943                 }
1944                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1945         }
1946
1947         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1948
1949         /**
1950          * @param $limit array
1951          * @param $expiry array
1952          * @param $cascade bool
1953          * @param $reason string
1954          * @param $user User
1955          * @return Status
1956          */
1957         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1958                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1959         }
1960
1961         /**
1962          * @param $limit array
1963          * @param $reason string
1964          * @param $cascade int
1965          * @param $expiry array
1966          * @return bool
1967          */
1968         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1969                 return $this->mPage->doUpdateRestrictions(
1970                         $limit,
1971                         $expiry,
1972                         $cascade,
1973                         $reason,
1974                         $this->getContext()->getUser()
1975                 );
1976         }
1977
1978         /**
1979          * @param $reason string
1980          * @param $suppress bool
1981          * @param $id int
1982          * @param $commit bool
1983          * @param $error string
1984          * @return bool
1985          */
1986         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1987                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1988         }
1989
1990         /**
1991          * @param $fromP
1992          * @param $summary
1993          * @param $token
1994          * @param $bot
1995          * @param $resultDetails
1996          * @param $user User
1997          * @return array
1998          */
1999         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2000                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2001                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2002         }
2003
2004         /**
2005          * @param $fromP
2006          * @param $summary
2007          * @param $bot
2008          * @param $resultDetails
2009          * @param $guser User
2010          * @return array
2011          */
2012         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2013                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2014                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2015         }
2016
2017         /**
2018          * @param $hasHistory bool
2019          * @return mixed
2020          */
2021         public function generateReason( &$hasHistory ) {
2022                 $title = $this->mPage->getTitle();
2023                 $handler = ContentHandler::getForTitle( $title );
2024                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2025         }
2026
2027         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
2028
2029         /**
2030          * @return array
2031          */
2032         public static function selectFields() {
2033                 return WikiPage::selectFields();
2034         }
2035
2036         /**
2037          * @param $title Title
2038          */
2039         public static function onArticleCreate( $title ) {
2040                 WikiPage::onArticleCreate( $title );
2041         }
2042
2043         /**
2044          * @param $title Title
2045          */
2046         public static function onArticleDelete( $title ) {
2047                 WikiPage::onArticleDelete( $title );
2048         }
2049
2050         /**
2051          * @param $title Title
2052          */
2053         public static function onArticleEdit( $title ) {
2054                 WikiPage::onArticleEdit( $title );
2055         }
2056
2057         /**
2058          * @param $oldtext
2059          * @param $newtext
2060          * @param $flags
2061          * @return string
2062          * @deprecated since 1.21, use ContentHandler::getAutosummary() instead
2063          */
2064         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2065                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2066         }
2067         // ******
2068 }