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