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