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