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