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