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