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