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                                 $content = new MessageContent( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', null, 'parsemag' );
 284                         }
 285                         wfProfileOut( __METHOD__ );
 286
 287                         return $content;
 288                 } else {
 289                         $this->fetchContentObject();
 290                         wfProfileOut( __METHOD__ );
 291
 292                         return $this->mContentObject;
 293                 }
 294         }
 295
 296         /**
 297          * @return int The oldid of the article that is to be shown, 0 for the
 298          *             current revision
 299          */
 300         public function getOldID() {
 301                 if ( is_null( $this->mOldId ) ) {
 302                         $this->mOldId = $this->getOldIDFromRequest();
 303                 }
 304
 305                 return $this->mOldId;
 306         }
 307
 308         /**
 309          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 310          *
 311          * @return int The old id for the request
 312          */
 313         public function getOldIDFromRequest() {
 314                 $this->mRedirectUrl = false;
 315
 316                 $request = $this->getContext()->getRequest();
 317                 $oldid = $request->getIntOrNull( 'oldid' );
 318
 319                 if ( $oldid === null ) {
 320                         return 0;
 321                 }
 322
 323                 if ( $oldid !== 0 ) {
 324                         # Load the given revision and check whether the page is another one.
 325                         # In that case, update this instance to reflect the change.
 326                         if ( $oldid === $this->mPage->getLatest() ) {
 327                                 $this->mRevision = $this->mPage->getRevision();
 328                         } else {
 329                                 $this->mRevision = Revision::newFromId( $oldid );
 330                                 if ( $this->mRevision !== null ) {
 331                                         // Revision title doesn't match the page title given?
 332                                         if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 333                                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 334                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 335                                         }
 336                                 }
 337                         }
 338                 }
 339
 340                 if ( $request->getVal( 'direction' ) == 'next' ) {
 341                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 342                         if ( $nextid ) {
 343                                 $oldid = $nextid;
 344                                 $this->mRevision = null;
 345                         } else {
 346                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 347                         }
 348                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 349                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 350                         if ( $previd ) {
 351                                 $oldid = $previd;
 352                                 $this->mRevision = null;
 353                         }
 354                 }
 355
 356                 return $oldid;
 357         }
 358
 359         /**
 360          * Load the revision (including text) into this object
 361          *
 362          * @deprecated in 1.19; use fetchContent()
 363          */
 364         function loadContent() {
 365                 wfDeprecated( __METHOD__, '1.19' );
 366                 $this->fetchContent();
 367         }
 368
 369         /**
 370          * Get text of an article from database
 371          * Does *NOT* follow redirects.
 372          *
 373          * @protected
 374          * @note this is really internal functionality that should really NOT be used by other functions. For accessing
 375          *       article content, use the WikiPage class, especially WikiBase::getContent(). However, a lot of legacy code
 376          *       uses this method to retrieve page text from the database, so the function has to remain public for now.
 377          *
 378          * @return mixed string containing article contents, or false if null
 379          * @deprecated in 1.WD, use WikiPage::getContent() instead
 380          */
 381         function fetchContent() { #BC cruft!
 382                 wfDeprecated( __METHOD__, '1.WD' );
 383
 384                 if ( $this->mContentLoaded && $this->mContent ) {
 385                         return $this->mContent;
 386                 }
 387
 388                 wfProfileIn( __METHOD__ );
 389
 390                 $content = $this->fetchContentObject();
 391
 392                 $this->mContent = ContentHandler::getContentText( $content ); #@todo: get rid of mContent everywhere!
 393                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ); #BC cruft, deprecated!
 394
 395                 wfProfileOut( __METHOD__ );
 396
 397                 return $this->mContent;
 398         }
 399
 400
 401         /**
 402          * Get text content object
 403          * Does *NOT* follow redirects.
 404          * TODO: when is this null?
 405          *
 406          * @note code that wants to retrieve page content from the database should use WikiPage::getContent().
 407          *
 408          * @return Content|null
 409          *
 410          * @since 1.WD
 411          */
 412         protected function fetchContentObject() {
 413                 if ( $this->mContentLoaded ) {
 414                         return $this->mContentObject;
 415                 }
 416
 417                 wfProfileIn( __METHOD__ );
 418
 419                 $this->mContentLoaded = true;
 420                 $this->mContent = null;
 421
 422                 $oldid = $this->getOldID();
 423
 424                 # Pre-fill content with error message so that if something
 425                 # fails we'll have something telling us what we intended.
 426                 $t = $this->getTitle()->getPrefixedText();
 427                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 428                 $this->mContentObject = new MessageContent( 'missing-article', array($t, $d), array() ) ; // @todo: this isn't page content but a UI message. horrible.
 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                 $outputPage->addHTML(
1046                         "<div class='patrollink'>" .
1047                                 wfMsgHtml(
1048                                         'markaspatrolledlink',
1049                                         Linker::linkKnown(
1050                                                 $this->getTitle(),
1051                                                 wfMsgHtml( 'markaspatrolledtext' ),
1052                                                 array(),
1053                                                 array(
1054                                                         'action' => 'markpatrolled',
1055                                                         'rcid' => $rcid,
1056                                                         'token' => $token,
1057                                                 )
1058                                         )
1059                                 ) .
1060                         '</div>'
1061                 );
1062         }
1063
1064         /**
1065          * Show the error text for a missing article. For articles in the MediaWiki
1066          * namespace, show the default message text. To be called from Article::view().
1067          */
1068         public function showMissingArticle() {
1069                 global $wgSend404Code;
1070                 $outputPage = $this->getContext()->getOutput();
1071
1072                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1073                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
1074                         $parts = explode( '/', $this->getTitle()->getText() );
1075                         $rootPart = $parts[0];
1076                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1077                         $ip = User::isIP( $rootPart );
1078
1079                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
1080                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1081                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1082                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1083                                 LogEventsList::showLogExtract(
1084                                         $outputPage,
1085                                         'block',
1086                                         $user->getUserPage()->getPrefixedText(),
1087                                         '',
1088                                         array(
1089                                                 'lim' => 1,
1090                                                 'showIfEmpty' => false,
1091                                                 'msgKey' => array(
1092                                                         'blocked-notice-logextract',
1093                                                         $user->getName() # Support GENDER in notice
1094                                                 )
1095                                         )
1096                                 );
1097                         }
1098                 }
1099
1100                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1101
1102                 # Show delete and move logs
1103                 LogEventsList::showLogExtract( $outputPage, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
1104                         array(  'lim' => 10,
1105                                 'conds' => array( "log_action != 'revision'" ),
1106                                 'showIfEmpty' => false,
1107                                 'msgKey' => array( 'moveddeleted-notice' ) )
1108                 );
1109
1110                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1111                         // If there's no backing content, send a 404 Not Found
1112                         // for better machine handling of broken links.
1113                         $this->getContext()->getRequest()->response()->header( "HTTP/1.1 404 Not Found" );
1114                 }
1115
1116                 $hookResult = wfRunHooks( 'BeforeDisplayNoArticleText', array( $this ) );
1117
1118                 if ( ! $hookResult ) {
1119                         return;
1120                 }
1121
1122                 # Show error message
1123                 $oldid = $this->getOldID();
1124                 if ( $oldid ) {
1125                         $text = wfMsgNoTrans( 'missing-article',
1126                                 $this->getTitle()->getPrefixedText(),
1127                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
1128                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1129                         // Use the default message text
1130                         $text = $this->getTitle()->getDefaultMessageText();
1131                 } elseif ( $this->getTitle()->quickUserCan( 'create', $this->getContext()->getUser() )
1132                         && $this->getTitle()->quickUserCan( 'edit', $this->getContext()->getUser() )
1133                 ) {
1134                         $text = wfMsgNoTrans( 'noarticletext' );
1135                 } else {
1136                         $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1137                 }
1138                 $text = "<div class='noarticletext'>\n$text\n</div>";
1139
1140                 $outputPage->addWikiText( $text );
1141         }
1142
1143         /**
1144          * If the revision requested for view is deleted, check permissions.
1145          * Send either an error message or a warning header to the output.
1146          *
1147          * @return boolean true if the view is allowed, false if not.
1148          */
1149         public function showDeletedRevisionHeader() {
1150                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1151                         // Not deleted
1152                         return true;
1153                 }
1154
1155                 $outputPage = $this->getContext()->getOutput();
1156                 $user = $this->getContext()->getUser();
1157                 // If the user is not allowed to see it...
1158                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1159                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1160                                 'rev-deleted-text-permission' );
1161
1162                         return false;
1163                 // If the user needs to confirm that they want to see it...
1164                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1165                         # Give explanation and add a link to view the revision...
1166                         $oldid = intval( $this->getOldID() );
1167                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1168                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1169                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1170                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1171                                 array( $msg, $link ) );
1172
1173                         return false;
1174                 // We are allowed to see...
1175                 } else {
1176                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1177                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1178                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1179
1180                         return true;
1181                 }
1182         }
1183
1184         /**
1185          * Generate the navigation links when browsing through an article revisions
1186          * It shows the information as:
1187          *   Revision as of \<date\>; view current revision
1188          *   \<- Previous version | Next Version -\>
1189          *
1190          * @param $oldid int: revision ID of this article revision
1191          */
1192         public function setOldSubtitle( $oldid = 0 ) {
1193                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1194                         return;
1195                 }
1196
1197                 $unhide = $this->getContext()->getRequest()->getInt( 'unhide' ) == 1;
1198
1199                 # Cascade unhide param in links for easy deletion browsing
1200                 $extraParams = array();
1201                 if ( $unhide ) {
1202                         $extraParams['unhide'] = 1;
1203                 }
1204
1205                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1206                         $revision = $this->mRevision;
1207                 } else {
1208                         $revision = Revision::newFromId( $oldid );
1209                 }
1210
1211                 $timestamp = $revision->getTimestamp();
1212
1213                 $current = ( $oldid == $this->mPage->getLatest() );
1214                 $language = $this->getContext()->getLanguage();
1215                 $user = $this->getContext()->getUser();
1216
1217                 $td = $language->userTimeAndDate( $timestamp, $user );
1218                 $tddate = $language->userDate( $timestamp, $user );
1219                 $tdtime = $language->userTime( $timestamp, $user );
1220
1221                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1222                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1223
1224                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1225                         ? 'revision-info-current'
1226                         : 'revision-info';
1227
1228                 $outputPage = $this->getContext()->getOutput();
1229                 $outputPage->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1230                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1231                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1232
1233                 $lnk = $current
1234                         ? wfMsgHtml( 'currentrevisionlink' )
1235                         : Linker::linkKnown(
1236                                 $this->getTitle(),
1237                                 wfMsgHtml( 'currentrevisionlink' ),
1238                                 array(),
1239                                 $extraParams
1240                         );
1241                 $curdiff = $current
1242                         ? wfMsgHtml( 'diff' )
1243                         : Linker::linkKnown(
1244                                 $this->getTitle(),
1245                                 wfMsgHtml( 'diff' ),
1246                                 array(),
1247                                 array(
1248                                         'diff' => 'cur',
1249                                         'oldid' => $oldid
1250                                 ) + $extraParams
1251                         );
1252                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1253                 $prevlink = $prev
1254                         ? Linker::linkKnown(
1255                                 $this->getTitle(),
1256                                 wfMsgHtml( 'previousrevision' ),
1257                                 array(),
1258                                 array(
1259                                         'direction' => 'prev',
1260                                         'oldid' => $oldid
1261                                 ) + $extraParams
1262                         )
1263                         : wfMsgHtml( 'previousrevision' );
1264                 $prevdiff = $prev
1265                         ? Linker::linkKnown(
1266                                 $this->getTitle(),
1267                                 wfMsgHtml( 'diff' ),
1268                                 array(),
1269                                 array(
1270                                         'diff' => 'prev',
1271                                         'oldid' => $oldid
1272                                 ) + $extraParams
1273                         )
1274                         : wfMsgHtml( 'diff' );
1275                 $nextlink = $current
1276                         ? wfMsgHtml( 'nextrevision' )
1277                         : Linker::linkKnown(
1278                                 $this->getTitle(),
1279                                 wfMsgHtml( 'nextrevision' ),
1280                                 array(),
1281                                 array(
1282                                         'direction' => 'next',
1283                                         'oldid' => $oldid
1284                                 ) + $extraParams
1285                         );
1286                 $nextdiff = $current
1287                         ? wfMsgHtml( 'diff' )
1288                         : Linker::linkKnown(
1289                                 $this->getTitle(),
1290                                 wfMsgHtml( 'diff' ),
1291                                 array(),
1292                                 array(
1293                                         'diff' => 'next',
1294                                         'oldid' => $oldid
1295                                 ) + $extraParams
1296                         );
1297
1298                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1299                 if ( $cdel !== '' ) {
1300                         $cdel .= ' ';
1301                 }
1302
1303                 $outputPage->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1304                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1305                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1306         }
1307
1308         /**
1309          * View redirect
1310          *
1311          * @param $target Title|Array of destination(s) to redirect
1312          * @param $appendSubtitle Boolean [optional]
1313          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1314          * @return string containing HMTL with redirect link
1315          */
1316         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1317                 global $wgStylePath;
1318
1319                 if ( !is_array( $target ) ) {
1320                         $target = array( $target );
1321                 }
1322
1323                 $lang = $this->getTitle()->getPageLanguage();
1324                 $imageDir = $lang->getDir();
1325
1326                 if ( $appendSubtitle ) {
1327                         $this->getContext()->getOutput()->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1328                 }
1329
1330                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1331
1332                 /**
1333                  * @var $title Title
1334                  */
1335                 $title = array_shift( $target );
1336
1337                 if ( $forceKnown ) {
1338                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1339                 } else {
1340                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1341                 }
1342
1343                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1344                 $alt = $lang->isRTL() ? '←' : '→';
1345                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1346                 foreach ( $target as $rt ) {
1347                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1348                         if ( $forceKnown ) {
1349                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1350                         } else {
1351                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1352                         }
1353                 }
1354
1355                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1356                 return '<div class="redirectMsg">' .
1357                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1358                         '<span class="redirectText">' . $link . '</span></div>';
1359         }
1360
1361         /**
1362          * Handle action=render
1363          */
1364         public function render() {
1365                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1366                 $this->view();
1367         }
1368
1369         /**
1370          * action=protect handler
1371          */
1372         public function protect() {
1373                 $form = new ProtectionForm( $this );
1374                 $form->execute();
1375         }
1376
1377         /**
1378          * action=unprotect handler (alias)
1379          */
1380         public function unprotect() {
1381                 $this->protect();
1382         }
1383
1384         /**
1385          * UI entry point for page deletion
1386          */
1387         public function delete() {
1388                 # This code desperately needs to be totally rewritten
1389
1390                 $title = $this->getTitle();
1391                 $user = $this->getContext()->getUser();
1392
1393                 # Check permissions
1394                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1395                 if ( count( $permission_errors ) ) {
1396                         throw new PermissionsError( 'delete', $permission_errors );
1397                 }
1398
1399                 # Read-only check...
1400                 if ( wfReadOnly() ) {
1401                         throw new ReadOnlyError;
1402                 }
1403
1404                 # Better double-check that it hasn't been deleted yet!
1405                 $this->mPage->loadPageData( 'fromdbmaster' );
1406                 if ( !$this->mPage->exists() ) {
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( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1413                         LogEventsList::showLogExtract(
1414                                 $outputPage,
1415                                 'delete',
1416                                 $title->getPrefixedText()
1417                         );
1418
1419                         return;
1420                 }
1421
1422                 $request = $this->getContext()->getRequest();
1423                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1424                 $deleteReason = $request->getText( 'wpReason' );
1425
1426                 if ( $deleteReasonList == 'other' ) {
1427                         $reason = $deleteReason;
1428                 } elseif ( $deleteReason != '' ) {
1429                         // Entry from drop down menu + additional comment
1430                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1431                 } else {
1432                         $reason = $deleteReasonList;
1433                 }
1434
1435                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1436                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1437                 {
1438                         # Flag to hide all contents of the archived revisions
1439                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1440
1441                         $this->doDelete( $reason, $suppress );
1442
1443                         if ( $user->isLoggedIn() && $request->getCheck( 'wpWatch' ) != $user->isWatched( $title ) ) {
1444                                 if ( $request->getCheck( 'wpWatch' ) ) {
1445                                         WatchAction::doWatch( $title, $user );
1446                                 } else {
1447                                         WatchAction::doUnwatch( $title, $user );
1448                                 }
1449                         }
1450
1451                         return;
1452                 }
1453
1454                 // Generate deletion reason
1455                 $hasHistory = false;
1456                 if ( !$reason ) {
1457                         try {
1458                                 $reason = $this->generateReason( $hasHistory );
1459                         } catch (MWException $e) {
1460                                 # if a page is horribly broken, we still want to be able to delete it. so be lenient about errors here.
1461                                 wfDebug("Error while building auto delete summary: $e");
1462                                 $reason = '';
1463                         }
1464                 }
1465
1466                 // If the page has a history, insert a warning
1467                 if ( $hasHistory ) {
1468                         $revisions = $this->mTitle->estimateRevisionCount();
1469                         // @todo FIXME: i18n issue/patchwork message
1470                         $this->getContext()->getOutput()->addHTML( '<strong class="mw-delete-warning-revisions">' .
1471                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $this->getContext()->getLanguage()->formatNum( $revisions ) ) .
1472                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1473                                         wfMsgHtml( 'history' ),
1474                                         array( 'rel' => 'archives' ),
1475                                         array( 'action' => 'history' ) ) .
1476                                 '</strong>'
1477                         );
1478
1479                         if ( $this->mTitle->isBigDeletion() ) {
1480                                 global $wgDeleteRevisionsLimit;
1481                                 $this->getContext()->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1482                                         array( 'delete-warning-toobig', $this->getContext()->getLanguage()->formatNum( $wgDeleteRevisionsLimit ) ) );
1483                         }
1484                 }
1485
1486                 $this->confirmDelete( $reason );
1487         }
1488
1489         /**
1490          * Output deletion confirmation dialog
1491          * @todo FIXME: Move to another file?
1492          * @param $reason String: prefilled reason
1493          */
1494         public function confirmDelete( $reason ) {
1495                 wfDebug( "Article::confirmDelete\n" );
1496
1497                 $outputPage = $this->getContext()->getOutput();
1498                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1499                 $outputPage->addBacklinkSubtitle( $this->getTitle() );
1500                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1501                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1502
1503                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $outputPage, &$reason ) );
1504
1505                 $user = $this->getContext()->getUser();
1506
1507                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1508                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1509                                         <td></td>
1510                                         <td class='mw-input'><strong>" .
1511                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1512                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1513                                         "</strong></td>
1514                                 </tr>";
1515                 } else {
1516                         $suppress = '';
1517                 }
1518                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $this->getTitle() );
1519
1520                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1521                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1522                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1523                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1524                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1525                         "<tr id=\"wpDeleteReasonListRow\">
1526                                 <td class='mw-label'>" .
1527                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1528                                 "</td>
1529                                 <td class='mw-input'>" .
1530                                         Xml::listDropDown( 'wpDeleteReasonList',
1531                                                 wfMsgForContent( 'deletereason-dropdown' ),
1532                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1533                                 "</td>
1534                         </tr>
1535                         <tr id=\"wpDeleteReasonRow\">
1536                                 <td class='mw-label'>" .
1537                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1538                                 "</td>
1539                                 <td class='mw-input'>" .
1540                                 Html::input( 'wpReason', $reason, 'text', array(
1541                                         'size' => '60',
1542                                         'maxlength' => '255',
1543                                         'tabindex' => '2',
1544                                         'id' => 'wpReason',
1545                                         'autofocus'
1546                                 ) ) .
1547                                 "</td>
1548                         </tr>";
1549
1550                 # Disallow watching if user is not logged in
1551                 if ( $user->isLoggedIn() ) {
1552                         $form .= "
1553                         <tr>
1554                                 <td></td>
1555                                 <td class='mw-input'>" .
1556                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1557                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1558                                 "</td>
1559                         </tr>";
1560                 }
1561
1562                 $form .= "
1563                         $suppress
1564                         <tr>
1565                                 <td></td>
1566                                 <td class='mw-submit'>" .
1567                                         Xml::submitButton( wfMsg( 'deletepage' ),
1568                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1569                                 "</td>
1570                         </tr>" .
1571                         Xml::closeElement( 'table' ) .
1572                         Xml::closeElement( 'fieldset' ) .
1573                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1574                         Xml::closeElement( 'form' );
1575
1576                         if ( $user->isAllowed( 'editinterface' ) ) {
1577                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1578                                 $link = Linker::link(
1579                                         $title,
1580                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1581                                         array(),
1582                                         array( 'action' => 'edit' )
1583                                 );
1584                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1585                         }
1586
1587                 $outputPage->addHTML( $form );
1588                 $outputPage->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1589                 LogEventsList::showLogExtract( $outputPage, 'delete',
1590                         $this->getTitle()->getPrefixedText()
1591                 );
1592         }
1593
1594         /**
1595          * Perform a deletion and output success or failure messages
1596          * @param $reason
1597          * @param $suppress bool
1598          */
1599         public function doDelete( $reason, $suppress = false ) {
1600                 $error = '';
1601                 $outputPage = $this->getContext()->getOutput();
1602                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error );
1603                 if ( $status->isGood() ) {
1604                         $deleted = $this->getTitle()->getPrefixedText();
1605
1606                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1607                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1608
1609                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1610
1611                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1612                         $outputPage->returnToMain( false );
1613                 } else {
1614                         $outputPage->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1615                         if ( $error == '' ) {
1616                                 $errors = $status->getErrorsArray();
1617                                 $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1618                                         $errors[0]
1619                                 );
1620                                 $outputPage->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1621
1622                                 LogEventsList::showLogExtract(
1623                                         $outputPage,
1624                                         'delete',
1625                                         $this->getTitle()->getPrefixedText()
1626                                 );
1627                         } else {
1628                                 $outputPage->addHTML( $error );
1629                         }
1630                 }
1631         }
1632
1633         /* Caching functions */
1634
1635         /**
1636          * checkLastModified returns true if it has taken care of all
1637          * output to the client that is necessary for this request.
1638          * (that is, it has sent a cached version of the page)
1639          *
1640          * @return boolean true if cached version send, false otherwise
1641          */
1642         protected function tryFileCache() {
1643                 static $called = false;
1644
1645                 if ( $called ) {
1646                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1647                         return false;
1648                 }
1649
1650                 $called = true;
1651                 if ( $this->isFileCacheable() ) {
1652                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1653                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1654                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1655                                 $cache->loadFromFileCache( $this->getContext() );
1656                                 return true;
1657                         } else {
1658                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1659                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1660                         }
1661                 } else {
1662                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1663                 }
1664
1665                 return false;
1666         }
1667
1668         /**
1669          * Check if the page can be cached
1670          * @return bool
1671          */
1672         public function isFileCacheable() {
1673                 $cacheable = false;
1674
1675                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1676                         $cacheable = $this->mPage->getID()
1677                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1678                         // Extension may have reason to disable file caching on some pages.
1679                         if ( $cacheable ) {
1680                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1681                         }
1682                 }
1683
1684                 return $cacheable;
1685         }
1686
1687         /**#@-*/
1688
1689         /**
1690          * Lightweight method to get the parser output for a page, checking the parser cache
1691          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1692          * consider, so it's not appropriate to use there.
1693          *
1694          * @since 1.16 (r52326) for LiquidThreads
1695          *
1696          * @param $oldid mixed integer Revision ID or null
1697          * @param $user User The relevant user
1698          * @return ParserOutput or false if the given revsion ID is not found
1699          */
1700         public function getParserOutput( $oldid = null, User $user = null ) {
1701                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
1702                 $parserOptions = $this->mPage->makeParserOptions( $user );
1703
1704                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1705         }
1706
1707         /**
1708          * Get parser options suitable for rendering the primary article wikitext
1709          * @return ParserOptions
1710          */
1711         public function getParserOptions() {
1712                 if ( !$this->mParserOptions ) {
1713                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext()->getUser() );
1714                 }
1715                 // Clone to allow modifications of the return value without affecting cache
1716                 return clone $this->mParserOptions;
1717         }
1718
1719         /**
1720          * Sets the context this Article is executed in
1721          *
1722          * @param $context IContextSource
1723          * @since 1.18
1724          */
1725         public function setContext( $context ) {
1726                 $this->mContext = $context;
1727         }
1728
1729         /**
1730          * Gets the context this Article is executed in
1731          *
1732          * @return IContextSource
1733          * @since 1.18
1734          */
1735         public function getContext() {
1736                 if ( $this->mContext instanceof IContextSource ) {
1737                         return $this->mContext;
1738                 } else {
1739                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1740                         return RequestContext::getMain();
1741                 }
1742         }
1743
1744         /**
1745          * Info about this page
1746          * @deprecated since 1.19
1747          */
1748         public function info() {
1749                 wfDeprecated( __METHOD__, '1.19' );
1750                 Action::factory( 'info', $this )->show();
1751         }
1752
1753         /**
1754          * Mark this particular edit/page as patrolled
1755          * @deprecated since 1.18
1756          */
1757         public function markpatrolled() {
1758                 wfDeprecated( __METHOD__, '1.18' );
1759                 Action::factory( 'markpatrolled', $this )->show();
1760         }
1761
1762         /**
1763          * Handle action=purge
1764          * @deprecated since 1.19
1765          * @return Action|bool|null false if the action is disabled, null if it is not recognised
1766          */
1767         public function purge() {
1768                 return Action::factory( 'purge', $this )->show();
1769         }
1770
1771         /**
1772          * Handle action=revert
1773          * @deprecated since 1.19
1774          */
1775         public function revert() {
1776                 wfDeprecated( __METHOD__, '1.19' );
1777                 Action::factory( 'revert', $this )->show();
1778         }
1779
1780         /**
1781          * Handle action=rollback
1782          * @deprecated since 1.19
1783          */
1784         public function rollback() {
1785                 wfDeprecated( __METHOD__, '1.19' );
1786                 Action::factory( 'rollback', $this )->show();
1787         }
1788
1789         /**
1790          * User-interface handler for the "watch" action.
1791          * Requires Request to pass a token as of 1.18.
1792          * @deprecated since 1.18
1793          */
1794         public function watch() {
1795                 wfDeprecated( __METHOD__, '1.18' );
1796                 Action::factory( 'watch', $this )->show();
1797         }
1798
1799         /**
1800          * Add this page to the current user's watchlist
1801          *
1802          * This is safe to be called multiple times
1803          *
1804          * @return bool true on successful watch operation
1805          * @deprecated since 1.18
1806          */
1807         public function doWatch() {
1808                 wfDeprecated( __METHOD__, '1.18' );
1809                 return WatchAction::doWatch( $this->getTitle(), $this->getContext()->getUser() );
1810         }
1811
1812         /**
1813          * User interface handler for the "unwatch" action.
1814          * Requires Request to pass a token as of 1.18.
1815          * @deprecated since 1.18
1816          */
1817         public function unwatch() {
1818                 wfDeprecated( __METHOD__, '1.18' );
1819                 Action::factory( 'unwatch', $this )->show();
1820         }
1821
1822         /**
1823          * Stop watching a page
1824          * @return bool true on successful unwatch
1825          * @deprecated since 1.18
1826          */
1827         public function doUnwatch() {
1828                 wfDeprecated( __METHOD__, '1.18' );
1829                 return WatchAction::doUnwatch( $this->getTitle(), $this->getContext()->getUser() );
1830         }
1831
1832         /**
1833          * Output a redirect back to the article.
1834          * This is typically used after an edit.
1835          *
1836          * @deprecated in 1.18; call OutputPage::redirect() directly
1837          * @param $noRedir Boolean: add redirect=no
1838          * @param $sectionAnchor String: section to redirect to, including "#"
1839          * @param $extraQuery String: extra query params
1840          */
1841         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1842                 wfDeprecated( __METHOD__, '1.18' );
1843                 if ( $noRedir ) {
1844                         $query = 'redirect=no';
1845                         if ( $extraQuery )
1846                                 $query .= "&$extraQuery";
1847                 } else {
1848                         $query = $extraQuery;
1849                 }
1850
1851                 $this->getContext()->getOutput()->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1852         }
1853
1854         /**
1855          * Use PHP's magic __get handler to handle accessing of
1856          * raw WikiPage fields for backwards compatibility.
1857          *
1858          * @param $fname String Field name
1859          */
1860         public function __get( $fname ) {
1861                 if ( property_exists( $this->mPage, $fname ) ) {
1862                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1863                         return $this->mPage->$fname;
1864                 }
1865                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1866         }
1867
1868         /**
1869          * Use PHP's magic __set handler to handle setting of
1870          * raw WikiPage fields for backwards compatibility.
1871          *
1872          * @param $fname String Field name
1873          * @param $fvalue mixed New value
1874          */
1875         public function __set( $fname, $fvalue ) {
1876                 if ( property_exists( $this->mPage, $fname ) ) {
1877                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1878                         $this->mPage->$fname = $fvalue;
1879                 // Note: extensions may want to toss on new fields
1880                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1881                         $this->mPage->$fname = $fvalue;
1882                 } else {
1883                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1884                 }
1885         }
1886
1887         /**
1888          * Use PHP's magic __call handler to transform instance calls to
1889          * WikiPage functions for backwards compatibility.
1890          *
1891          * @param $fname String Name of called method
1892          * @param $args Array Arguments to the method
1893          * @return mixed
1894          */
1895         public function __call( $fname, $args ) {
1896                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1897                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1898                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1899                 }
1900                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1901         }
1902
1903         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1904
1905         /**
1906          * @param $limit array
1907          * @param $expiry array
1908          * @param $cascade bool
1909          * @param $reason string
1910          * @param $user User
1911          * @return Status
1912          */
1913         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1914                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1915         }
1916
1917         /**
1918          * @param $limit array
1919          * @param $reason string
1920          * @param $cascade int
1921          * @param $expiry array
1922          * @return bool
1923          */
1924         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1925                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1926         }
1927
1928         /**
1929          * @param $reason string
1930          * @param $suppress bool
1931          * @param $id int
1932          * @param $commit bool
1933          * @param $error string
1934          * @return bool
1935          */
1936         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1937                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1938         }
1939
1940         /**
1941          * @param $fromP
1942          * @param $summary
1943          * @param $token
1944          * @param $bot
1945          * @param $resultDetails
1946          * @param $user User
1947          * @return array
1948          */
1949         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1950                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
1951                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1952         }
1953
1954         /**
1955          * @param $fromP
1956          * @param $summary
1957          * @param $bot
1958          * @param $resultDetails
1959          * @param $guser User
1960          * @return array
1961          */
1962         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1963                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
1964                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1965         }
1966
1967         /**
1968          * @param $hasHistory bool
1969          * @return mixed
1970          */
1971         public function generateReason( &$hasHistory ) {
1972                 $title = $this->mPage->getTitle();
1973                 $handler = ContentHandler::getForTitle( $title );
1974                 return $handler->getAutoDeleteReason( $title, $hasHistory );
1975         }
1976
1977         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1978
1979         /**
1980          * @return array
1981          */
1982         public static function selectFields() {
1983                 return WikiPage::selectFields();
1984         }
1985
1986         /**
1987          * @param $title Title
1988          */
1989         public static function onArticleCreate( $title ) {
1990                 WikiPage::onArticleCreate( $title );
1991         }
1992
1993         /**
1994          * @param $title Title
1995          */
1996         public static function onArticleDelete( $title ) {
1997                 WikiPage::onArticleDelete( $title );
1998         }
1999
2000         /**
2001          * @param $title Title
2002          */
2003         public static function onArticleEdit( $title ) {
2004                 WikiPage::onArticleEdit( $title );
2005         }
2006
2007         /**
2008          * @param $oldtext
2009          * @param $newtext
2010          * @param $flags
2011          * @return string
2012          * @deprecated since 1.WD, use ContentHandler::getAutosummary() instead
2013          */
2014         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2015                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2016         }
2017         // ******
2018 }