includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class for viewing MediaWiki article and history.
   9  *
  10  * This maintains WikiPage functions for backwards compatibility.
  11  *
  12  * @TODO: move and rewrite code to an Action class
  13  *
  14  * See design.txt for an overview.
  15  * Note: edit user interface and cache support functions have been
  16  * moved to separate EditPage and HTMLFileCache classes.
  17  *
  18  * @internal documentation reviewed 15 Mar 2010
  19  */
  20 class Article extends Page {
  21         /**@{{
  22          * @private
  23          */
  24
  25         /**
  26          * @var IContextSource
  27          */
  28         protected $mContext;
  29
  30         /**
  31          * @var WikiPage
  32          */
  33         protected $mPage;
  34
  35         /**
  36          * @var ParserOptions: ParserOptions object for $wgUser articles
  37          */
  38         public $mParserOptions;
  39
  40         var $mContent;                    // !<
  41         var $mContentLoaded = false;      // !<
  42         var $mOldId;                      // !<
  43
  44         /**
  45          * @var Title
  46          */
  47         var $mRedirectedFrom = null;
  48
  49         /**
  50          * @var mixed: boolean false or URL string
  51          */
  52         var $mRedirectUrl = false;        // !<
  53         var $mRevIdFetched = 0;           // !<
  54
  55         /**
  56          * @var Revision
  57          */
  58         var $mRevision = null;
  59
  60         /**
  61          * @var ParserOutput
  62          */
  63         var $mParserOutput;
  64
  65         /**@}}*/
  66
  67         /**
  68          * Constructor and clear the article
  69          * @param $title Title Reference to a Title object.
  70          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  71          */
  72         public function __construct( Title $title, $oldId = null ) {
  73                 $this->mOldId = $oldId;
  74                 $this->mPage = $this->newPage( $title );
  75         }
  76
  77         /**
  78          * @param $title Title
  79          * @return WikiPage
  80          */
  81         protected function newPage( Title $title ) {
  82                 return new WikiPage( $title );
  83         }
  84
  85         /**
  86          * Constructor from a page id
  87          * @param $id Int article ID to load
  88          * @return Article|null
  89          */
  90         public static function newFromID( $id ) {
  91                 $t = Title::newFromID( $id );
  92                 # @todo FIXME: Doesn't inherit right
  93                 return $t == null ? null : new self( $t );
  94                 # return $t == null ? null : new static( $t ); // PHP 5.3
  95         }
  96
  97         /**
  98          * Create an Article object of the appropriate class for the given page.
  99          *
 100          * @param $title Title
 101          * @param $context IContextSource
 102          * @return Article object
 103          */
 104         public static function newFromTitle( $title, IContextSource $context ) {
 105                 if ( NS_MEDIA == $title->getNamespace() ) {
 106                         // FIXME: where should this go?
 107                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 108                 }
 109
 110                 $page = null;
 111                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 112                 if ( !$page ) {
 113                         switch( $title->getNamespace() ) {
 114                                 case NS_FILE:
 115                                         $page = new ImagePage( $title );
 116                                         break;
 117                                 case NS_CATEGORY:
 118                                         $page = new CategoryPage( $title );
 119                                         break;
 120                                 default:
 121                                         $page = new Article( $title );
 122                         }
 123                 }
 124                 $page->setContext( $context );
 125
 126                 return $page;
 127         }
 128
 129         /**
 130          * Create an Article object of the appropriate class for the given page.
 131          *
 132          * @param $page WikiPage
 133          * @param $context IContextSource
 134          * @return Article object
 135          */
 136         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 137                 $article = self::newFromTitle( $page->getTitle(), $context );
 138                 $article->mPage = $page; // override to keep process cached vars
 139                 return $article;
 140         }
 141
 142         /**
 143          * Tell the page view functions that this view was redirected
 144          * from another page on the wiki.
 145          * @param $from Title object.
 146          */
 147         public function setRedirectedFrom( Title $from ) {
 148                 $this->mRedirectedFrom = $from;
 149         }
 150
 151         /**
 152          * Get the title object of the article
 153          * @return Title object of this page
 154          */
 155         public function getTitle() {
 156                 return $this->mPage->getTitle();
 157         }
 158
 159         /**
 160          * Clear the object
 161          */
 162         public function clear() {
 163                 $this->mContentLoaded = false;
 164
 165                 $this->mRedirectedFrom = null; # Title object if set
 166                 $this->mRevIdFetched = 0;
 167                 $this->mRedirectUrl = false;
 168
 169                 $this->mPage->clear();
 170         }
 171
 172         /**
 173          * Note that getContent/loadContent do not follow redirects anymore.
 174          * If you need to fetch redirectable content easily, try
 175          * the shortcut in Article::followRedirect()
 176          *
 177          * This function has side effects! Do not use this function if you
 178          * only want the real revision text if any.
 179          *
 180          * @return Return the text of this revision
 181          */
 182         public function getContent() {
 183                 global $wgUser;
 184
 185                 wfProfileIn( __METHOD__ );
 186
 187                 if ( $this->mPage->getID() === 0 ) {
 188                         # If this is a MediaWiki:x message, then load the messages
 189                         # and return the message value for x.
 190                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 191                                 $text = $this->getTitle()->getDefaultMessageText();
 192                                 if ( $text === false ) {
 193                                         $text = '';
 194                                 }
 195                         } else {
 196                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 197                         }
 198                         wfProfileOut( __METHOD__ );
 199
 200                         return $text;
 201                 } else {
 202                         $this->fetchContent();
 203                         wfProfileOut( __METHOD__ );
 204
 205                         return $this->mContent;
 206                 }
 207         }
 208
 209         /**
 210          * @return int The oldid of the article that is to be shown, 0 for the
 211          *             current revision
 212          */
 213         public function getOldID() {
 214                 if ( is_null( $this->mOldId ) ) {
 215                         $this->mOldId = $this->getOldIDFromRequest();
 216                 }
 217
 218                 return $this->mOldId;
 219         }
 220
 221         /**
 222          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 223          *
 224          * @return int The old id for the request
 225          */
 226         public function getOldIDFromRequest() {
 227                 global $wgRequest;
 228
 229                 $this->mRedirectUrl = false;
 230
 231                 $oldid = $wgRequest->getIntOrNull( 'oldid' );
 232
 233                 if ( $oldid === null ) {
 234                         return 0;
 235                 }
 236
 237                 if ( $oldid !== 0 ) {
 238                         # Load the given revision and check whether the page is another one.
 239                         # In that case, update this instance to reflect the change.
 240                         $this->mRevision = Revision::newFromId( $oldid );
 241                         if ( $this->mRevision !== null ) {
 242                                 // Revision title doesn't match the page title given?
 243                                 if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 244                                         $function = array( get_class( $this->mPage ), 'newFromID' );
 245                                         $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 246                                 }
 247                         }
 248                 }
 249
 250                 if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 251                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 252                         if ( $nextid ) {
 253                                 $oldid = $nextid;
 254                         } else {
 255                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 256                         }
 257                 } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 258                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 259                         if ( $previd ) {
 260                                 $oldid = $previd;
 261                         }
 262                 }
 263
 264                 return $oldid;
 265         }
 266
 267         /**
 268          * Load the revision (including text) into this object
 269          *
 270          * @deprecated in 1.19; use fetchContent()
 271          */
 272         function loadContent() {
 273                 wfDeprecated( __METHOD__, '1.19' );
 274                 $this->fetchContent();
 275         }
 276
 277         /**
 278          * Get text of an article from database
 279          * Does *NOT* follow redirects.
 280          *
 281          * @return mixed string containing article contents, or false if null
 282          */
 283         function fetchContent() {
 284                 if ( $this->mContentLoaded ) {
 285                         return $this->mContent;
 286                 }
 287
 288                 wfProfileIn( __METHOD__ );
 289
 290                 $this->mContentLoaded = true;
 291
 292                 $oldid = $this->getOldID();
 293
 294                 # Pre-fill content with error message so that if something
 295                 # fails we'll have something telling us what we intended.
 296                 $t = $this->getTitle()->getPrefixedText();
 297                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 298                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 299
 300                 if ( $oldid ) {
 301                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 302                         if ( !$this->mRevision ) {
 303                                 $this->mRevision = Revision::newFromId( $oldid );
 304                                 if ( !$this->mRevision ) {
 305                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 306                                         wfProfileOut( __METHOD__ );
 307                                         return false;
 308                                 }
 309                         }
 310                 } else {
 311                         if ( !$this->mPage->getLatest() ) {
 312                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 313                                 wfProfileOut( __METHOD__ );
 314                                 return false;
 315                         }
 316
 317                         $this->mRevision = $this->mPage->getRevision();
 318                         if ( !$this->mRevision ) {
 319                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 320                                 wfProfileOut( __METHOD__ );
 321                                 return false;
 322                         }
 323                 }
 324
 325                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 326                 // We should instead work with the Revision object when we need it...
 327                 $this->mContent = $this->mRevision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 328                 $this->mRevIdFetched = $this->mRevision->getId();
 329
 330                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 331
 332                 wfProfileOut( __METHOD__ );
 333
 334                 return $this->mContent;
 335         }
 336
 337         /**
 338          * No-op
 339          * @deprecated since 1.18
 340          */
 341         public function forUpdate() {
 342                 wfDeprecated( __METHOD__, '1.18' );
 343         }
 344
 345         /**
 346          * Returns true if the currently-referenced revision is the current edit
 347          * to this page (and it exists).
 348          * @return bool
 349          */
 350         public function isCurrent() {
 351                 # If no oldid, this is the current version.
 352                 if ( $this->getOldID() == 0 ) {
 353                         return true;
 354                 }
 355
 356                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 357         }
 358
 359         /**
 360          * Get the fetched Revision object depending on request parameters or null
 361          * on failure.
 362          *
 363          * @return Revision|null
 364          */
 365         public function getRevisionFetched() {
 366                 $this->fetchContent();
 367
 368                 return $this->mRevision;
 369         }
 370
 371         /**
 372          * Use this to fetch the rev ID used on page views
 373          *
 374          * @return int revision ID of last article revision
 375          */
 376         public function getRevIdFetched() {
 377                 if ( $this->mRevIdFetched ) {
 378                         return $this->mRevIdFetched;
 379                 } else {
 380                         return $this->mPage->getLatest();
 381                 }
 382         }
 383
 384         /**
 385          * This is the default action of the index.php entry point: just view the
 386          * page of the given title.
 387          */
 388         public function view() {
 389                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 390                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 391
 392                 wfProfileIn( __METHOD__ );
 393
 394                 # Get variables from query string
 395                 # As side effect this will load the revision and update the title
 396                 # in a revision ID is passed in the request, so this should remain
 397                 # the first call of this method even if $oldid is used way below.
 398                 $oldid = $this->getOldID();
 399
 400                 # Another whitelist check in case getOldID() is altering the title
 401                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $wgUser );
 402                 if ( count( $permErrors ) ) {
 403                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 404                         wfProfileOut( __METHOD__ );
 405                         throw new PermissionsError( 'read', $permErrors );
 406                 }
 407
 408                 # getOldID() may as well want us to redirect somewhere else
 409                 if ( $this->mRedirectUrl ) {
 410                         $wgOut->redirect( $this->mRedirectUrl );
 411                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 412                         wfProfileOut( __METHOD__ );
 413
 414                         return;
 415                 }
 416
 417                 # If we got diff in the query, we want to see a diff page instead of the article.
 418                 if ( $wgRequest->getCheck( 'diff' ) ) {
 419                         wfDebug( __METHOD__ . ": showing diff page\n" );
 420                         $this->showDiffPage();
 421                         wfProfileOut( __METHOD__ );
 422
 423                         return;
 424                 }
 425
 426                 # Set page title (may be overridden by DISPLAYTITLE)
 427                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 428
 429                 $wgOut->setArticleFlag( true );
 430                 # Allow frames by default
 431                 $wgOut->allowClickjacking();
 432
 433                 $parserCache = ParserCache::singleton();
 434
 435                 $parserOptions = $this->getParserOptions();
 436                 # Render printable version, use printable version cache
 437                 if ( $wgOut->isPrintable() ) {
 438                         $parserOptions->setIsPrintable( true );
 439                         $parserOptions->setEditSection( false );
 440                 } elseif ( !$this->getTitle()->quickUserCan( 'edit' ) ) {
 441                         $parserOptions->setEditSection( false );
 442                 }
 443
 444                 # Try client and file cache
 445                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 446                         if ( $wgUseETag ) {
 447                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 448                         }
 449
 450                         # Is it client cached?
 451                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 452                                 wfDebug( __METHOD__ . ": done 304\n" );
 453                                 wfProfileOut( __METHOD__ );
 454
 455                                 return;
 456                         # Try file cache
 457                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 458                                 wfDebug( __METHOD__ . ": done file cache\n" );
 459                                 # tell wgOut that output is taken care of
 460                                 $wgOut->disable();
 461                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 462                                 wfProfileOut( __METHOD__ );
 463
 464                                 return;
 465                         }
 466                 }
 467
 468                 # Should the parser cache be used?
 469                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 470                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 471                 if ( $wgUser->getStubThreshold() ) {
 472                         wfIncrStats( 'pcache_miss_stub' );
 473                 }
 474
 475                 $this->showRedirectedFromHeader();
 476                 $this->showNamespaceHeader();
 477
 478                 # Iterate through the possible ways of constructing the output text.
 479                 # Keep going until $outputDone is set, or we run out of things to do.
 480                 $pass = 0;
 481                 $outputDone = false;
 482                 $this->mParserOutput = false;
 483
 484                 while ( !$outputDone && ++$pass ) {
 485                         switch( $pass ) {
 486                                 case 1:
 487                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 488                                         break;
 489                                 case 2:
 490                                         # Early abort if the page doesn't exist
 491                                         if ( !$this->mPage->exists() ) {
 492                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 493                                                 $this->showMissingArticle();
 494                                                 wfProfileOut( __METHOD__ );
 495                                                 return;
 496                                         }
 497
 498                                         # Try the parser cache
 499                                         if ( $useParserCache ) {
 500                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 501
 502                                                 if ( $this->mParserOutput !== false ) {
 503                                                         if ( $oldid ) {
 504                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 505                                                                 $this->setOldSubtitle( $oldid );
 506                                                         } else {
 507                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 508                                                         }
 509                                                         $wgOut->addParserOutput( $this->mParserOutput );
 510                                                         # Ensure that UI elements requiring revision ID have
 511                                                         # the correct version information.
 512                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 513                                                         # Preload timestamp to avoid a DB hit
 514                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 515                                                         if ( $cachedTimestamp !== null ) {
 516                                                                 $wgOut->setRevisionTimestamp( $cachedTimestamp );
 517                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 518                                                         }
 519                                                         $outputDone = true;
 520                                                 }
 521                                         }
 522                                         break;
 523                                 case 3:
 524                                         # This will set $this->mRevision if needed
 525                                         $this->fetchContent();
 526
 527                                         # Are we looking at an old revision
 528                                         if ( $oldid && $this->mRevision ) {
 529                                                 $this->setOldSubtitle( $oldid );
 530
 531                                                 if ( !$this->showDeletedRevisionHeader() ) {
 532                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 533                                                         wfProfileOut( __METHOD__ );
 534                                                         return;
 535                                                 }
 536                                         }
 537
 538                                         # Ensure that UI elements requiring revision ID have
 539                                         # the correct version information.
 540                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 541                                         # Preload timestamp to avoid a DB hit
 542                                         $wgOut->setRevisionTimestamp( $this->getTimestamp() );
 543
 544                                         # Pages containing custom CSS or JavaScript get special treatment
 545                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 546                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 547                                                 $this->showCssOrJsPage();
 548                                                 $outputDone = true;
 549                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 550                                                 # Allow extensions do their own custom view for certain pages
 551                                                 $outputDone = true;
 552                                         } else {
 553                                                 $text = $this->getContent();
 554                                                 $rt = Title::newFromRedirectArray( $text );
 555                                                 if ( $rt ) {
 556                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 557                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 558                                                         $wgOut->addHTML( $this->viewRedirect( $rt ) );
 559                                                         # Parse just to get categories, displaytitle, etc.
 560                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 561                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 562                                                         $outputDone = true;
 563                                                 }
 564                                         }
 565                                         break;
 566                                 case 4:
 567                                         # Run the parse, protected by a pool counter
 568                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 569
 570                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 571                                                 $this->getRevIdFetched(), $useParserCache, $this->getContent() );
 572
 573                                         if ( !$poolArticleView->execute() ) {
 574                                                 $error = $poolArticleView->getError();
 575                                                 if ( $error ) {
 576                                                         $wgOut->clearHTML(); // for release() errors
 577                                                         $wgOut->enableClientCache( false );
 578                                                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 579
 580                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 581                                                         $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 582                                                 }
 583                                                 # Connection or timeout error
 584                                                 wfProfileOut( __METHOD__ );
 585                                                 return;
 586                                         }
 587
 588                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 589                                         $wgOut->addParserOutput( $this->mParserOutput );
 590
 591                                         # Don't cache a dirty ParserOutput object
 592                                         if ( $poolArticleView->getIsDirty() ) {
 593                                                 $wgOut->setSquidMaxage( 0 );
 594                                                 $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 595                                         }
 596
 597                                         $outputDone = true;
 598                                         break;
 599                                 # Should be unreachable, but just in case...
 600                                 default:
 601                                         break 2;
 602                         }
 603                 }
 604
 605                 # Get the ParserOutput actually *displayed* here.
 606                 # Note that $this->mParserOutput is the *current* version output.
 607                 $pOutput = ( $outputDone instanceof ParserOutput )
 608                         ? $outputDone // object fetched by hook
 609                         : $this->mParserOutput;
 610
 611                 # Adjust title for main page & pages with displaytitle
 612                 if ( $pOutput ) {
 613                         $this->adjustDisplayTitle( $pOutput );
 614                 }
 615
 616                 # For the main page, overwrite the <title> element with the con-
 617                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 618                 # that's not empty).
 619                 # This message always exists because it is in the i18n files
 620                 if ( $this->getTitle()->isMainPage() ) {
 621                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 622                         if ( !$msg->isDisabled() ) {
 623                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 624                         }
 625                 }
 626
 627                 # Check for any __NOINDEX__ tags on the page using $pOutput
 628                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 629                 $wgOut->setIndexPolicy( $policy['index'] );
 630                 $wgOut->setFollowPolicy( $policy['follow'] );
 631
 632                 $this->showViewFooter();
 633                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 634
 635                 wfProfileOut( __METHOD__ );
 636         }
 637
 638         /**
 639          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 640          * @param $pOutput ParserOutput
 641          */
 642         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 643                 global $wgOut;
 644                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 645                 $titleText = $pOutput->getTitleText();
 646                 if ( strval( $titleText ) !== '' ) {
 647                         $wgOut->setPageTitle( $titleText );
 648                 }
 649         }
 650
 651         /**
 652          * Show a diff page according to current request variables. For use within
 653          * Article::view() only, other callers should use the DifferenceEngine class.
 654          */
 655         public function showDiffPage() {
 656                 global $wgRequest, $wgUser;
 657
 658                 $diff = $wgRequest->getVal( 'diff' );
 659                 $rcid = $wgRequest->getVal( 'rcid' );
 660                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 661                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 662                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 663                 $oldid = $this->getOldID();
 664
 665                 $de = new DifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 666                 // DifferenceEngine directly fetched the revision:
 667                 $this->mRevIdFetched = $de->mNewid;
 668                 $de->showDiffPage( $diffOnly );
 669
 670                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 671                         # Run view updates for current revision only
 672                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 673                 }
 674         }
 675
 676         /**
 677          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 678          * Article::view() only.
 679          *
 680          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 681          * page views.
 682          */
 683         protected function showCssOrJsPage() {
 684                 global $wgOut;
 685
 686                 $dir = $this->getContext()->getLanguage()->getDir();
 687                 $lang = $this->getContext()->getLanguage()->getCode();
 688
 689                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 690                         'clearyourcache' );
 691
 692                 // Give hooks a chance to customise the output
 693                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 694                         // Wrap the whole lot in a <pre> and don't parse
 695                         $m = array();
 696                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 697                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 698                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 699                         $wgOut->addHTML( "\n</pre>\n" );
 700                 }
 701         }
 702
 703         /**
 704          * Get the robot policy to be used for the current view
 705          * @param $action String the action= GET parameter
 706          * @param $pOutput ParserOutput
 707          * @return Array the policy that should be set
 708          * TODO: actions other than 'view'
 709          */
 710         public function getRobotPolicy( $action, $pOutput ) {
 711                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 712                 global $wgDefaultRobotPolicy, $wgRequest;
 713
 714                 $ns = $this->getTitle()->getNamespace();
 715
 716                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 717                         # Don't index user and user talk pages for blocked users (bug 11443)
 718                         if ( !$this->getTitle()->isSubpage() ) {
 719                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 720                                         return array(
 721                                                 'index'  => 'noindex',
 722                                                 'follow' => 'nofollow'
 723                                         );
 724                                 }
 725                         }
 726                 }
 727
 728                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 729                         # Non-articles (special pages etc), and old revisions
 730                         return array(
 731                                 'index'  => 'noindex',
 732                                 'follow' => 'nofollow'
 733                         );
 734                 } elseif ( $wgOut->isPrintable() ) {
 735                         # Discourage indexing of printable versions, but encourage following
 736                         return array(
 737                                 'index'  => 'noindex',
 738                                 'follow' => 'follow'
 739                         );
 740                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 741                         # For ?curid=x urls, disallow indexing
 742                         return array(
 743                                 'index'  => 'noindex',
 744                                 'follow' => 'follow'
 745                         );
 746                 }
 747
 748                 # Otherwise, construct the policy based on the various config variables.
 749                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 750
 751                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 752                         # Honour customised robot policies for this namespace
 753                         $policy = array_merge(
 754                                 $policy,
 755                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 756                         );
 757                 }
 758                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 759                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 760                         # a final sanity check that we have really got the parser output.
 761                         $policy = array_merge(
 762                                 $policy,
 763                                 array( 'index' => $pOutput->getIndexPolicy() )
 764                         );
 765                 }
 766
 767                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 768                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 769                         $policy = array_merge(
 770                                 $policy,
 771                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 772                         );
 773                 }
 774
 775                 return $policy;
 776         }
 777
 778         /**
 779          * Converts a String robot policy into an associative array, to allow
 780          * merging of several policies using array_merge().
 781          * @param $policy Mixed, returns empty array on null/false/'', transparent
 782          *            to already-converted arrays, converts String.
 783          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 784          */
 785         public static function formatRobotPolicy( $policy ) {
 786                 if ( is_array( $policy ) ) {
 787                         return $policy;
 788                 } elseif ( !$policy ) {
 789                         return array();
 790                 }
 791
 792                 $policy = explode( ',', $policy );
 793                 $policy = array_map( 'trim', $policy );
 794
 795                 $arr = array();
 796                 foreach ( $policy as $var ) {
 797                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 798                                 $arr['index'] = $var;
 799                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 800                                 $arr['follow'] = $var;
 801                         }
 802                 }
 803
 804                 return $arr;
 805         }
 806
 807         /**
 808          * If this request is a redirect view, send "redirected from" subtitle to
 809          * $wgOut. Returns true if the header was needed, false if this is not a
 810          * redirect view. Handles both local and remote redirects.
 811          *
 812          * @return boolean
 813          */
 814         public function showRedirectedFromHeader() {
 815                 global $wgOut, $wgRequest, $wgRedirectSources;
 816
 817                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 818
 819                 if ( isset( $this->mRedirectedFrom ) ) {
 820                         // This is an internally redirected page view.
 821                         // We'll need a backlink to the source page for navigation.
 822                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 823                                 $redir = Linker::linkKnown(
 824                                         $this->mRedirectedFrom,
 825                                         null,
 826                                         array(),
 827                                         array( 'redirect' => 'no' )
 828                                 );
 829
 830                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 831
 832                                 // Set the fragment if one was specified in the redirect
 833                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 834                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 835                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 836                                 }
 837
 838                                 // Add a <link rel="canonical"> tag
 839                                 $wgOut->addLink( array( 'rel' => 'canonical',
 840                                         'href' => $this->getTitle()->getLocalURL() )
 841                                 );
 842
 843                                 // Tell $wgOut the user arrived at this article through a redirect
 844                                 $wgOut->setRedirectedFrom( $this->mRedirectedFrom );
 845
 846                                 return true;
 847                         }
 848                 } elseif ( $rdfrom ) {
 849                         // This is an externally redirected view, from some other wiki.
 850                         // If it was reported from a trusted site, supply a backlink.
 851                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 852                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 853                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 854
 855                                 return true;
 856                         }
 857                 }
 858
 859                 return false;
 860         }
 861
 862         /**
 863          * Show a header specific to the namespace currently being viewed, like
 864          * [[MediaWiki:Talkpagetext]]. For Article::view().
 865          */
 866         public function showNamespaceHeader() {
 867                 global $wgOut;
 868
 869                 if ( $this->getTitle()->isTalkPage() ) {
 870                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 871                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 872                         }
 873                 }
 874         }
 875
 876         /**
 877          * Show the footer section of an ordinary page view
 878          */
 879         public function showViewFooter() {
 880                 global $wgOut;
 881
 882                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 883                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 884                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 885                 }
 886
 887                 # If we have been passed an &rcid= parameter, we want to give the user a
 888                 # chance to mark this new article as patrolled.
 889                 $this->showPatrolFooter();
 890
 891                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 892
 893         }
 894
 895         /**
 896          * If patrol is possible, output a patrol UI box. This is called from the
 897          * footer section of ordinary page views. If patrol is not possible or not
 898          * desired, does nothing.
 899          */
 900         public function showPatrolFooter() {
 901                 global $wgOut, $wgRequest, $wgUser;
 902
 903                 $rcid = $wgRequest->getVal( 'rcid' );
 904
 905                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 906                         return;
 907                 }
 908
 909                 $token = $wgUser->getEditToken( $rcid );
 910                 $wgOut->preventClickjacking();
 911
 912                 $wgOut->addHTML(
 913                         "<div class='patrollink'>" .
 914                                 wfMsgHtml(
 915                                         'markaspatrolledlink',
 916                                         Linker::link(
 917                                                 $this->getTitle(),
 918                                                 wfMsgHtml( 'markaspatrolledtext' ),
 919                                                 array(),
 920                                                 array(
 921                                                         'action' => 'markpatrolled',
 922                                                         'rcid' => $rcid,
 923                                                         'token' => $token,
 924                                                 ),
 925                                                 array( 'known', 'noclasses' )
 926                                         )
 927                                 ) .
 928                         '</div>'
 929                 );
 930         }
 931
 932         /**
 933          * Show the error text for a missing article. For articles in the MediaWiki
 934          * namespace, show the default message text. To be called from Article::view().
 935          */
 936         public function showMissingArticle() {
 937                 global $wgOut, $wgRequest, $wgUser, $wgSend404Code;
 938
 939                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 940                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 941                         $parts = explode( '/', $this->getTitle()->getText() );
 942                         $rootPart = $parts[0];
 943                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 944                         $ip = User::isIP( $rootPart );
 945
 946                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
 947                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
 948                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
 949                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 950                                 LogEventsList::showLogExtract(
 951                                         $wgOut,
 952                                         'block',
 953                                         $user->getUserPage()->getPrefixedText(),
 954                                         '',
 955                                         array(
 956                                                 'lim' => 1,
 957                                                 'showIfEmpty' => false,
 958                                                 'msgKey' => array(
 959                                                         'blocked-notice-logextract',
 960                                                         $user->getName() # Support GENDER in notice
 961                                                 )
 962                                         )
 963                                 );
 964                         }
 965                 }
 966
 967                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
 968
 969                 # Show delete and move logs
 970                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
 971                         array(  'lim' => 10,
 972                                 'conds' => array( "log_action != 'revision'" ),
 973                                 'showIfEmpty' => false,
 974                                 'msgKey' => array( 'moveddeleted-notice' ) )
 975                 );
 976
 977                 # Show error message
 978                 $oldid = $this->getOldID();
 979                 if ( $oldid ) {
 980                         $text = wfMsgNoTrans( 'missing-article',
 981                                 $this->getTitle()->getPrefixedText(),
 982                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
 983                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
 984                         // Use the default message text
 985                         $text = $this->getTitle()->getDefaultMessageText();
 986                 } else {
 987                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
 988                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
 989                         $errors = array_merge( $createErrors, $editErrors );
 990
 991                         if ( !count( $errors ) ) {
 992                                 $text = wfMsgNoTrans( 'noarticletext' );
 993                         } else {
 994                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
 995                         }
 996                 }
 997                 $text = "<div class='noarticletext'>\n$text\n</div>";
 998
 999                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1000                         // If there's no backing content, send a 404 Not Found
1001                         // for better machine handling of broken links.
1002                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
1003                 }
1004
1005                 $wgOut->addWikiText( $text );
1006         }
1007
1008         /**
1009          * If the revision requested for view is deleted, check permissions.
1010          * Send either an error message or a warning header to $wgOut.
1011          *
1012          * @return boolean true if the view is allowed, false if not.
1013          */
1014         public function showDeletedRevisionHeader() {
1015                 global $wgOut, $wgRequest;
1016
1017                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1018                         // Not deleted
1019                         return true;
1020                 }
1021
1022                 // If the user is not allowed to see it...
1023                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1024                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1025                                 'rev-deleted-text-permission' );
1026
1027                         return false;
1028                 // If the user needs to confirm that they want to see it...
1029                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1030                         # Give explanation and add a link to view the revision...
1031                         $oldid = intval( $this->getOldID() );
1032                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1033                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1034                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1035                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1036                                 array( $msg, $link ) );
1037
1038                         return false;
1039                 // We are allowed to see...
1040                 } else {
1041                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1042                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1043                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1044
1045                         return true;
1046                 }
1047         }
1048
1049         /**
1050          * Generate the navigation links when browsing through an article revisions
1051          * It shows the information as:
1052          *   Revision as of \<date\>; view current revision
1053          *   \<- Previous version | Next Version -\>
1054          *
1055          * @param $oldid String: revision ID of this article revision
1056          */
1057         public function setOldSubtitle( $oldid = 0 ) {
1058                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1059
1060                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1061                         return;
1062                 }
1063
1064                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1065
1066                 # Cascade unhide param in links for easy deletion browsing
1067                 $extraParams = array();
1068                 if ( $wgRequest->getVal( 'unhide' ) ) {
1069                         $extraParams['unhide'] = 1;
1070                 }
1071
1072                 $revision = Revision::newFromId( $oldid );
1073                 $timestamp = $revision->getTimestamp();
1074
1075                 $current = ( $oldid == $this->mPage->getLatest() );
1076                 $td = $wgLang->timeanddate( $timestamp, true );
1077                 $tddate = $wgLang->date( $timestamp, true );
1078                 $tdtime = $wgLang->time( $timestamp, true );
1079
1080                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1081                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1082
1083                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1084                         ? 'revision-info-current'
1085                         : 'revision-info';
1086
1087                 $wgOut->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1088                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1089                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1090
1091                 $lnk = $current
1092                         ? wfMsgHtml( 'currentrevisionlink' )
1093                         : Linker::link(
1094                                 $this->getTitle(),
1095                                 wfMsgHtml( 'currentrevisionlink' ),
1096                                 array(),
1097                                 $extraParams,
1098                                 array( 'known', 'noclasses' )
1099                         );
1100                 $curdiff = $current
1101                         ? wfMsgHtml( 'diff' )
1102                         : Linker::link(
1103                                 $this->getTitle(),
1104                                 wfMsgHtml( 'diff' ),
1105                                 array(),
1106                                 array(
1107                                         'diff' => 'cur',
1108                                         'oldid' => $oldid
1109                                 ) + $extraParams,
1110                                 array( 'known', 'noclasses' )
1111                         );
1112                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1113                 $prevlink = $prev
1114                         ? Linker::link(
1115                                 $this->getTitle(),
1116                                 wfMsgHtml( 'previousrevision' ),
1117                                 array(),
1118                                 array(
1119                                         'direction' => 'prev',
1120                                         'oldid' => $oldid
1121                                 ) + $extraParams,
1122                                 array( 'known', 'noclasses' )
1123                         )
1124                         : wfMsgHtml( 'previousrevision' );
1125                 $prevdiff = $prev
1126                         ? Linker::link(
1127                                 $this->getTitle(),
1128                                 wfMsgHtml( 'diff' ),
1129                                 array(),
1130                                 array(
1131                                         'diff' => 'prev',
1132                                         'oldid' => $oldid
1133                                 ) + $extraParams,
1134                                 array( 'known', 'noclasses' )
1135                         )
1136                         : wfMsgHtml( 'diff' );
1137                 $nextlink = $current
1138                         ? wfMsgHtml( 'nextrevision' )
1139                         : Linker::link(
1140                                 $this->getTitle(),
1141                                 wfMsgHtml( 'nextrevision' ),
1142                                 array(),
1143                                 array(
1144                                         'direction' => 'next',
1145                                         'oldid' => $oldid
1146                                 ) + $extraParams,
1147                                 array( 'known', 'noclasses' )
1148                         );
1149                 $nextdiff = $current
1150                         ? wfMsgHtml( 'diff' )
1151                         : Linker::link(
1152                                 $this->getTitle(),
1153                                 wfMsgHtml( 'diff' ),
1154                                 array(),
1155                                 array(
1156                                         'diff' => 'next',
1157                                         'oldid' => $oldid
1158                                 ) + $extraParams,
1159                                 array( 'known', 'noclasses' )
1160                         );
1161
1162                 $cdel = Linker::getRevDeleteLink( $wgUser, $revision, $this->getTitle() );
1163                 if ( $cdel !== '' ) {
1164                         $cdel .= ' ';
1165                 }
1166
1167                 $wgOut->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1168                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1169                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1170         }
1171
1172         /**
1173          * View redirect
1174          *
1175          * @param $target Title|Array of destination(s) to redirect
1176          * @param $appendSubtitle Boolean [optional]
1177          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1178          * @return string containing HMTL with redirect link
1179          */
1180         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1181                 global $wgOut, $wgStylePath;
1182
1183                 if ( !is_array( $target ) ) {
1184                         $target = array( $target );
1185                 }
1186
1187                 $lang = $this->getTitle()->getPageLanguage();
1188                 $imageDir = $lang->getDir();
1189
1190                 if ( $appendSubtitle ) {
1191                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1192                 }
1193
1194                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1195
1196                 /**
1197                  * @var $title Title
1198                  */
1199                 $title = array_shift( $target );
1200
1201                 if ( $forceKnown ) {
1202                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1203                 } else {
1204                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1205                 }
1206
1207                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1208                 $alt = $lang->isRTL() ? '←' : '→';
1209                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1210                 foreach ( $target as $rt ) {
1211                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1212                         if ( $forceKnown ) {
1213                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1214                         } else {
1215                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1216                         }
1217                 }
1218
1219                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1220                 return '<div class="redirectMsg">' .
1221                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1222                         '<span class="redirectText">' . $link . '</span></div>';
1223         }
1224
1225         /**
1226          * Handle action=render
1227          */
1228         public function render() {
1229                 global $wgOut;
1230
1231                 $wgOut->setArticleBodyOnly( true );
1232                 $this->view();
1233         }
1234
1235         /**
1236          * action=protect handler
1237          */
1238         public function protect() {
1239                 $form = new ProtectionForm( $this );
1240                 $form->execute();
1241         }
1242
1243         /**
1244          * action=unprotect handler (alias)
1245          */
1246         public function unprotect() {
1247                 $this->protect();
1248         }
1249
1250         /**
1251          * UI entry point for page deletion
1252          */
1253         public function delete() {
1254                 global $wgOut, $wgRequest, $wgLang;
1255
1256                 # This code desperately needs to be totally rewritten
1257
1258                 $title = $this->getTitle();
1259                 $user = $this->getContext()->getUser();
1260
1261                 # Check permissions
1262                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1263                 if ( count( $permission_errors ) ) {
1264                         throw new PermissionsError( 'delete', $permission_errors );
1265                 }
1266
1267                 # Read-only check...
1268                 if ( wfReadOnly() ) {
1269                         throw new ReadOnlyError;
1270                 }
1271
1272                 # Better double-check that it hasn't been deleted yet!
1273                 $dbw = wfGetDB( DB_MASTER );
1274                 $conds = $title->pageCond();
1275                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1276                 if ( $latest === false ) {
1277                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1278                         $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1279                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1280                                 );
1281                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1282                         LogEventsList::showLogExtract(
1283                                 $wgOut,
1284                                 'delete',
1285                                 $title->getPrefixedText()
1286                         );
1287
1288                         return;
1289                 }
1290
1291                 $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1292                 $deleteReason = $wgRequest->getText( 'wpReason' );
1293
1294                 if ( $deleteReasonList == 'other' ) {
1295                         $reason = $deleteReason;
1296                 } elseif ( $deleteReason != '' ) {
1297                         // Entry from drop down menu + additional comment
1298                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1299                 } else {
1300                         $reason = $deleteReasonList;
1301                 }
1302
1303                 if ( $wgRequest->wasPosted() && $user->matchEditToken( $wgRequest->getVal( 'wpEditToken' ),
1304                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1305                 {
1306                         # Flag to hide all contents of the archived revisions
1307                         $suppress = $wgRequest->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1308
1309                         $this->doDelete( $reason, $suppress );
1310
1311                         if ( $wgRequest->getCheck( 'wpWatch' ) && $user->isLoggedIn() ) {
1312                                 $this->doWatch();
1313                         } elseif ( $title->userIsWatching() ) {
1314                                 $this->doUnwatch();
1315                         }
1316
1317                         return;
1318                 }
1319
1320                 // Generate deletion reason
1321                 $hasHistory = false;
1322                 if ( !$reason ) {
1323                         $reason = $this->generateReason( $hasHistory );
1324                 }
1325
1326                 // If the page has a history, insert a warning
1327                 if ( $hasHistory ) {
1328                         $revisions = $this->mTitle->estimateRevisionCount();
1329                         // @todo FIXME: i18n issue/patchwork message
1330                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1331                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1332                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1333                                         wfMsgHtml( 'history' ),
1334                                         array( 'rel' => 'archives' ),
1335                                         array( 'action' => 'history' ) ) .
1336                                 '</strong>'
1337                         );
1338
1339                         if ( $this->mTitle->isBigDeletion() ) {
1340                                 global $wgDeleteRevisionsLimit;
1341                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1342                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1343                         }
1344                 }
1345
1346                 return $this->confirmDelete( $reason );
1347         }
1348
1349         /**
1350          * Output deletion confirmation dialog
1351          * @todo FIXME: Move to another file?
1352          * @param $reason String: prefilled reason
1353          */
1354         public function confirmDelete( $reason ) {
1355                 global $wgOut;
1356
1357                 wfDebug( "Article::confirmDelete\n" );
1358
1359                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1360                 $wgOut->addBacklinkSubtitle( $this->getTitle() );
1361                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1362                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1363
1364                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1365
1366                 $user = $this->getContext()->getUser();
1367
1368                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1369                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1370                                         <td></td>
1371                                         <td class='mw-input'><strong>" .
1372                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1373                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1374                                         "</strong></td>
1375                                 </tr>";
1376                 } else {
1377                         $suppress = '';
1378                 }
1379                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1380
1381                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1382                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1383                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1384                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1385                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1386                         "<tr id=\"wpDeleteReasonListRow\">
1387                                 <td class='mw-label'>" .
1388                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1389                                 "</td>
1390                                 <td class='mw-input'>" .
1391                                         Xml::listDropDown( 'wpDeleteReasonList',
1392                                                 wfMsgForContent( 'deletereason-dropdown' ),
1393                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1394                                 "</td>
1395                         </tr>
1396                         <tr id=\"wpDeleteReasonRow\">
1397                                 <td class='mw-label'>" .
1398                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1399                                 "</td>
1400                                 <td class='mw-input'>" .
1401                                 Html::input( 'wpReason', $reason, 'text', array(
1402                                         'size' => '60',
1403                                         'maxlength' => '255',
1404                                         'tabindex' => '2',
1405                                         'id' => 'wpReason',
1406                                         'autofocus'
1407                                 ) ) .
1408                                 "</td>
1409                         </tr>";
1410
1411                 # Disallow watching if user is not logged in
1412                 if ( $user->isLoggedIn() ) {
1413                         $form .= "
1414                         <tr>
1415                                 <td></td>
1416                                 <td class='mw-input'>" .
1417                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1418                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1419                                 "</td>
1420                         </tr>";
1421                 }
1422
1423                 $form .= "
1424                         $suppress
1425                         <tr>
1426                                 <td></td>
1427                                 <td class='mw-submit'>" .
1428                                         Xml::submitButton( wfMsg( 'deletepage' ),
1429                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1430                                 "</td>
1431                         </tr>" .
1432                         Xml::closeElement( 'table' ) .
1433                         Xml::closeElement( 'fieldset' ) .
1434                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1435                         Xml::closeElement( 'form' );
1436
1437                         if ( $user->isAllowed( 'editinterface' ) ) {
1438                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1439                                 $link = Linker::link(
1440                                         $title,
1441                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1442                                         array(),
1443                                         array( 'action' => 'edit' )
1444                                 );
1445                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1446                         }
1447
1448                 $wgOut->addHTML( $form );
1449                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1450                 LogEventsList::showLogExtract( $wgOut, 'delete',
1451                         $this->getTitle()->getPrefixedText()
1452                 );
1453         }
1454
1455         /**
1456          * Perform a deletion and output success or failure messages
1457          * @param $reason
1458          * @param $suppress bool
1459          */
1460         public function doDelete( $reason, $suppress = false ) {
1461                 global $wgOut;
1462
1463                 $error = '';
1464                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, 0, true, $error ) ) {
1465                         $deleted = $this->getTitle()->getPrefixedText();
1466
1467                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1468                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1469
1470                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1471
1472                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1473                         $wgOut->returnToMain( false );
1474                 } else {
1475                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1476                         if ( $error == '' ) {
1477                                 $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1478                                         array( 'cannotdelete', wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1479                                 );
1480                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1481
1482                                 LogEventsList::showLogExtract(
1483                                         $wgOut,
1484                                         'delete',
1485                                         $this->getTitle()->getPrefixedText()
1486                                 );
1487                         } else {
1488                                 $wgOut->addHTML( $error );
1489                         }
1490                 }
1491         }
1492
1493         /* Caching functions */
1494
1495         /**
1496          * checkLastModified returns true if it has taken care of all
1497          * output to the client that is necessary for this request.
1498          * (that is, it has sent a cached version of the page)
1499          *
1500          * @return boolean true if cached version send, false otherwise
1501          */
1502         protected function tryFileCache() {
1503                 static $called = false;
1504
1505                 if ( $called ) {
1506                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1507                         return false;
1508                 }
1509
1510                 $called = true;
1511                 if ( $this->isFileCacheable() ) {
1512                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1513                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1514                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1515                                 $cache->loadFromFileCache( $this->getContext() );
1516                                 return true;
1517                         } else {
1518                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1519                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1520                         }
1521                 } else {
1522                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1523                 }
1524
1525                 return false;
1526         }
1527
1528         /**
1529          * Check if the page can be cached
1530          * @return bool
1531          */
1532         public function isFileCacheable() {
1533                 $cacheable = false;
1534
1535                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1536                         $cacheable = $this->mPage->getID()
1537                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1538                         // Extension may have reason to disable file caching on some pages.
1539                         if ( $cacheable ) {
1540                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1541                         }
1542                 }
1543
1544                 return $cacheable;
1545         }
1546
1547         /**#@-*/
1548
1549         /**
1550          * Lightweight method to get the parser output for a page, checking the parser cache
1551          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1552          * consider, so it's not appropriate to use there.
1553          *
1554          * @since 1.16 (r52326) for LiquidThreads
1555          *
1556          * @param $oldid mixed integer Revision ID or null
1557          * @param $user User The relevant user
1558          * @return ParserOutput or false if the given revsion ID is not found
1559          */
1560         public function getParserOutput( $oldid = null, User $user = null ) {
1561                 global $wgUser;
1562
1563                 $user = is_null( $user ) ? $wgUser : $user;
1564                 $parserOptions = $this->mPage->makeParserOptions( $user );
1565
1566                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1567         }
1568
1569         /**
1570          * Get parser options suitable for rendering the primary article wikitext
1571          * @return ParserOptions|false
1572          */
1573         public function getParserOptions() {
1574                 global $wgUser;
1575                 if ( !$this->mParserOptions ) {
1576                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1577                 }
1578                 // Clone to allow modifications of the return value without affecting cache
1579                 return clone $this->mParserOptions;
1580         }
1581
1582         /**
1583          * Sets the context this Article is executed in
1584          *
1585          * @param $context IContextSource
1586          * @since 1.18
1587          */
1588         public function setContext( $context ) {
1589                 $this->mContext = $context;
1590         }
1591
1592         /**
1593          * Gets the context this Article is executed in
1594          *
1595          * @return IContextSource
1596          * @since 1.18
1597          */
1598         public function getContext() {
1599                 if ( $this->mContext instanceof IContextSource ) {
1600                         return $this->mContext;
1601                 } else {
1602                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1603                         return RequestContext::getMain();
1604                 }
1605         }
1606
1607         /**
1608          * Info about this page
1609          * @deprecated since 1.19
1610          */
1611         public function info() {
1612                 wfDeprecated( __METHOD__, '1.19' );
1613                 Action::factory( 'info', $this )->show();
1614         }
1615
1616         /**
1617          * Mark this particular edit/page as patrolled
1618          * @deprecated since 1.18
1619          */
1620         public function markpatrolled() {
1621                 wfDeprecated( __METHOD__, '1.18' );
1622                 Action::factory( 'markpatrolled', $this )->show();
1623         }
1624
1625         /**
1626          * Handle action=purge
1627          * @deprecated since 1.19
1628          */
1629         public function purge() {
1630                 return Action::factory( 'purge', $this )->show();
1631         }
1632
1633         /**
1634          * Handle action=revert
1635          * @deprecated since 1.19
1636          */
1637         public function revert() {
1638                 wfDeprecated( __METHOD__, '1.19' );
1639                 Action::factory( 'revert', $this )->show();
1640         }
1641
1642         /**
1643          * Handle action=rollback
1644          * @deprecated since 1.19
1645          */
1646         public function rollback() {
1647                 wfDeprecated( __METHOD__, '1.19' );
1648                 Action::factory( 'rollback', $this )->show();
1649         }
1650
1651         /**
1652          * User-interface handler for the "watch" action.
1653          * Requires Request to pass a token as of 1.18.
1654          * @deprecated since 1.18
1655          */
1656         public function watch() {
1657                 wfDeprecated( __METHOD__, '1.18' );
1658                 Action::factory( 'watch', $this )->show();
1659         }
1660
1661         /**
1662          * Add this page to $wgUser's watchlist
1663          *
1664          * This is safe to be called multiple times
1665          *
1666          * @return bool true on successful watch operation
1667          * @deprecated since 1.18
1668          */
1669         public function doWatch() {
1670                 global $wgUser;
1671                 wfDeprecated( __METHOD__, '1.18' );
1672                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1673         }
1674
1675         /**
1676          * User interface handler for the "unwatch" action.
1677          * Requires Request to pass a token as of 1.18.
1678          * @deprecated since 1.18
1679          */
1680         public function unwatch() {
1681                 wfDeprecated( __METHOD__, '1.18' );
1682                 Action::factory( 'unwatch', $this )->show();
1683         }
1684
1685         /**
1686          * Stop watching a page
1687          * @return bool true on successful unwatch
1688          * @deprecated since 1.18
1689          */
1690         public function doUnwatch() {
1691                 global $wgUser;
1692                 wfDeprecated( __METHOD__, '1.18' );
1693                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1694         }
1695
1696         /**
1697          * Output a redirect back to the article.
1698          * This is typically used after an edit.
1699          *
1700          * @deprecated in 1.18; call $wgOut->redirect() directly
1701          * @param $noRedir Boolean: add redirect=no
1702          * @param $sectionAnchor String: section to redirect to, including "#"
1703          * @param $extraQuery String: extra query params
1704          */
1705         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1706                 wfDeprecated( __METHOD__, '1.18' );
1707                 global $wgOut;
1708
1709                 if ( $noRedir ) {
1710                         $query = 'redirect=no';
1711                         if ( $extraQuery )
1712                                 $query .= "&$extraQuery";
1713                 } else {
1714                         $query = $extraQuery;
1715                 }
1716
1717                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1718         }
1719
1720         /**
1721          * Use PHP's magic __get handler to handle accessing of
1722          * raw WikiPage fields for backwards compatibility.
1723          *
1724          * @param $fname String Field name
1725          */
1726         public function __get( $fname ) {
1727                 if ( property_exists( $this->mPage, $fname ) ) {
1728                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1729                         return $this->mPage->$fname;
1730                 }
1731                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1732         }
1733
1734         /**
1735          * Use PHP's magic __set handler to handle setting of
1736          * raw WikiPage fields for backwards compatibility.
1737          *
1738          * @param $fname String Field name
1739          * @param $fvalue mixed New value
1740          */
1741         public function __set( $fname, $fvalue ) {
1742                 if ( property_exists( $this->mPage, $fname ) ) {
1743                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1744                         $this->mPage->$fname = $fvalue;
1745                 // Note: extensions may want to toss on new fields
1746                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1747                         $this->mPage->$fname = $fvalue;
1748                 } else {
1749                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1750                 }
1751         }
1752
1753         /**
1754          * Use PHP's magic __call handler to transform instance calls to
1755          * WikiPage functions for backwards compatibility.
1756          *
1757          * @param $fname String Name of called method
1758          * @param $args Array Arguments to the method
1759          */
1760         public function __call( $fname, $args ) {
1761                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1762                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1763                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1764                 }
1765                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1766         }
1767
1768         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1769
1770         /**
1771          * @param $limit array
1772          * @param $expiry array
1773          * @param $cascade bool
1774          * @param $reason string
1775          * @param $user User
1776          * @return Status
1777          */
1778         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1779                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1780         }
1781
1782         /**
1783          * @param $limit array
1784          * @param $reason string
1785          * @param $cascade int
1786          * @param $expiry array
1787          * @return bool
1788          */
1789         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1790                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1791         }
1792
1793         /**
1794          * @param $reason string
1795          * @param $suppress bool
1796          * @param $id int
1797          * @param $commit bool
1798          * @param $error string
1799          * @return bool
1800          */
1801         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1802                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1803         }
1804
1805         /**
1806          * @param $fromP
1807          * @param $summary
1808          * @param $token
1809          * @param $bot
1810          * @param $resultDetails
1811          * @param $user User
1812          * @return array
1813          */
1814         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1815                 global $wgUser;
1816                 $user = is_null( $user ) ? $wgUser : $user;
1817                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1818         }
1819
1820         /**
1821          * @param $fromP
1822          * @param $summary
1823          * @param $bot
1824          * @param $resultDetails
1825          * @param $guser User
1826          * @return array
1827          */
1828         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1829                 global $wgUser;
1830                 $guser = is_null( $guser ) ? $wgUser : $guser;
1831                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1832         }
1833
1834         /**
1835          * @param $hasHistory bool
1836          * @return mixed
1837          */
1838         public function generateReason( &$hasHistory ) {
1839                 return $this->mPage->getAutoDeleteReason( $hasHistory );
1840         }
1841
1842         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1843
1844         /**
1845          * @return array
1846          */
1847         public static function selectFields() {
1848                 return WikiPage::selectFields();
1849         }
1850
1851         /**
1852          * @param $title Title
1853          */
1854         public static function onArticleCreate( $title ) {
1855                 WikiPage::onArticleCreate( $title );
1856         }
1857
1858         /**
1859          * @param $title Title
1860          */
1861         public static function onArticleDelete( $title ) {
1862                 WikiPage::onArticleDelete( $title );
1863         }
1864
1865         /**
1866          * @param $title Title
1867          */
1868         public static function onArticleEdit( $title ) {
1869                 WikiPage::onArticleEdit( $title );
1870         }
1871
1872         /**
1873          * @param $oldtext
1874          * @param $newtext
1875          * @param $flags
1876          * @return string
1877          */
1878         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1879                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1880         }
1881         // ******
1882 }