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