includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class for viewing MediaWiki article and history.
   9  *
  10  * This maintains WikiPage functions for backwards compatibility.
  11  *
  12  * @TODO: move and rewrite code to an Action class
  13  *
  14  * See design.txt for an overview.
  15  * Note: edit user interface and cache support functions have been
  16  * moved to separate EditPage and HTMLFileCache classes.
  17  *
  18  * @internal documentation reviewed 15 Mar 2010
  19  */
  20 class Article extends Page {
  21         /**@{{
  22          * @private
  23          */
  24
  25         /**
  26          * @var IContextSource
  27          */
  28         protected $mContext;
  29
  30         /**
  31          * @var WikiPage
  32          */
  33         protected $mPage;
  34
  35         /**
  36          * @var ParserOptions: ParserOptions object for $wgUser articles
  37          */
  38         public $mParserOptions;
  39
  40         var $mContent;                    // !<
  41         var $mContentLoaded = false;      // !<
  42         var $mOldId;                      // !<
  43
  44         /**
  45          * @var Title
  46          */
  47         var $mRedirectedFrom = null;
  48
  49         /**
  50          * @var mixed: boolean false or URL string
  51          */
  52         var $mRedirectUrl = false;        // !<
  53         var $mRevIdFetched = 0;           // !<
  54
  55         /**
  56          * @var Revision
  57          */
  58         var $mRevision = null;
  59
  60         /**
  61          * @var ParserOutput
  62          */
  63         var $mParserOutput;
  64
  65         /**@}}*/
  66
  67         /**
  68          * Constructor and clear the article
  69          * @param $title Title Reference to a Title object.
  70          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  71          */
  72         public function __construct( Title $title, $oldId = null ) {
  73                 $this->mOldId = $oldId;
  74                 $this->mPage = $this->newPage( $title );
  75         }
  76
  77         /**
  78          * @param $title Title
  79          * @return WikiPage
  80          */
  81         protected function newPage( Title $title ) {
  82                 return new WikiPage( $title );
  83         }
  84
  85         /**
  86          * Constructor from a page id
  87          * @param $id Int article ID to load
  88          * @return Article|null
  89          */
  90         public static function newFromID( $id ) {
  91                 $t = Title::newFromID( $id );
  92                 # @todo FIXME: Doesn't inherit right
  93                 return $t == null ? null : new self( $t );
  94                 # return $t == null ? null : new static( $t ); // PHP 5.3
  95         }
  96
  97         /**
  98          * Create an Article object of the appropriate class for the given page.
  99          *
 100          * @param $title Title
 101          * @param $context IContextSource
 102          * @return Article object
 103          */
 104         public static function newFromTitle( $title, IContextSource $context ) {
 105                 if ( NS_MEDIA == $title->getNamespace() ) {
 106                         // FIXME: where should this go?
 107                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 108                 }
 109
 110                 $page = null;
 111                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 112                 if ( !$page ) {
 113                         switch( $title->getNamespace() ) {
 114                                 case NS_FILE:
 115                                         $page = new ImagePage( $title );
 116                                         break;
 117                                 case NS_CATEGORY:
 118                                         $page = new CategoryPage( $title );
 119                                         break;
 120                                 default:
 121                                         $page = new Article( $title );
 122                         }
 123                 }
 124                 $page->setContext( $context );
 125
 126                 return $page;
 127         }
 128
 129         /**
 130          * Create an Article object of the appropriate class for the given page.
 131          *
 132          * @param $page WikiPage
 133          * @param $context IContextSource
 134          * @return Article object
 135          */
 136         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 137                 $article = self::newFromTitle( $page->getTitle(), $context );
 138                 $article->mPage = $page; // override to keep process cached vars
 139                 return $article;
 140         }
 141
 142         /**
 143          * Tell the page view functions that this view was redirected
 144          * from another page on the wiki.
 145          * @param $from Title object.
 146          */
 147         public function setRedirectedFrom( Title $from ) {
 148                 $this->mRedirectedFrom = $from;
 149         }
 150
 151         /**
 152          * Get the title object of the article
 153          * @return Title object of this page
 154          */
 155         public function getTitle() {
 156                 return $this->mPage->getTitle();
 157         }
 158
 159         /**
 160          * Clear the object
 161          */
 162         public function clear() {
 163                 $this->mContentLoaded = false;
 164
 165                 $this->mRedirectedFrom = null; # Title object if set
 166                 $this->mRevIdFetched = 0;
 167                 $this->mRedirectUrl = false;
 168
 169                 $this->mPage->clear();
 170         }
 171
 172         /**
 173          * Note that getContent/loadContent do not follow redirects anymore.
 174          * If you need to fetch redirectable content easily, try
 175          * the shortcut in Article::followRedirect()
 176          *
 177          * This function has side effects! Do not use this function if you
 178          * only want the real revision text if any.
 179          *
 180          * @return Return the text of this revision
 181          */
 182         public function getContent() {
 183                 global $wgUser;
 184
 185                 wfProfileIn( __METHOD__ );
 186
 187                 if ( $this->mPage->getID() === 0 ) {
 188                         # If this is a MediaWiki:x message, then load the messages
 189                         # and return the message value for x.
 190                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 191                                 $text = $this->getTitle()->getDefaultMessageText();
 192                                 if ( $text === false ) {
 193                                         $text = '';
 194                                 }
 195                         } else {
 196                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 197                         }
 198                         wfProfileOut( __METHOD__ );
 199
 200                         return $text;
 201                 } else {
 202                         $this->fetchContent();
 203                         wfProfileOut( __METHOD__ );
 204
 205                         return $this->mContent;
 206                 }
 207         }
 208
 209         /**
 210          * @return int The oldid of the article that is to be shown, 0 for the
 211          *             current revision
 212          */
 213         public function getOldID() {
 214                 if ( is_null( $this->mOldId ) ) {
 215                         $this->mOldId = $this->getOldIDFromRequest();
 216                 }
 217
 218                 return $this->mOldId;
 219         }
 220
 221         /**
 222          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 223          *
 224          * @return int The old id for the request
 225          */
 226         public function getOldIDFromRequest() {
 227                 global $wgRequest;
 228
 229                 $this->mRedirectUrl = false;
 230
 231                 $oldid = $wgRequest->getIntOrNull( 'oldid' );
 232
 233                 if ( $oldid === null ) {
 234                         return 0;
 235                 }
 236
 237                 if ( $oldid !== 0 ) {
 238                         # Load the given revision and check whether the page is another one.
 239                         # In that case, update this instance to reflect the change.
 240                         $this->mRevision = Revision::newFromId( $oldid );
 241                         if ( $this->mRevision !== null ) {
 242                                 // Revision title doesn't match the page title given?
 243                                 if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 244                                         $function = array( get_class( $this->mPage ), 'newFromID' );
 245                                         $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 246                                 }
 247                         }
 248                 }
 249
 250                 if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 251                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 252                         if ( $nextid ) {
 253                                 $oldid = $nextid;
 254                         } else {
 255                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 256                         }
 257                 } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 258                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 259                         if ( $previd ) {
 260                                 $oldid = $previd;
 261                         }
 262                 }
 263
 264                 return $oldid;
 265         }
 266
 267         /**
 268          * Load the revision (including text) into this object
 269          *
 270          * @deprecated in 1.19; use fetchContent()
 271          */
 272         function loadContent() {
 273                 wfDeprecated( __METHOD__, '1.19' );
 274                 $this->fetchContent();
 275         }
 276
 277         /**
 278          * Get text of an article from database
 279          * Does *NOT* follow redirects.
 280          *
 281          * @return mixed string containing article contents, or false if null
 282          */
 283         function fetchContent() {
 284                 if ( $this->mContentLoaded ) {
 285                         return $this->mContent;
 286                 }
 287
 288                 wfProfileIn( __METHOD__ );
 289
 290                 $this->mContentLoaded = true;
 291
 292                 $oldid = $this->getOldID();
 293
 294                 # Pre-fill content with error message so that if something
 295                 # fails we'll have something telling us what we intended.
 296                 $t = $this->getTitle()->getPrefixedText();
 297                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 298                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 299
 300                 if ( $oldid ) {
 301                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 302                         if ( !$this->mRevision ) {
 303                                 $this->mRevision = Revision::newFromId( $oldid );
 304                                 if ( !$this->mRevision ) {
 305                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 306                                         wfProfileOut( __METHOD__ );
 307                                         return false;
 308                                 }
 309                         }
 310                 } else {
 311                         if ( !$this->mPage->getLatest() ) {
 312                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 313                                 wfProfileOut( __METHOD__ );
 314                                 return false;
 315                         }
 316
 317                         $this->mRevision = $this->mPage->getRevision();
 318                         if ( !$this->mRevision ) {
 319                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 320                                 wfProfileOut( __METHOD__ );
 321                                 return false;
 322                         }
 323                 }
 324
 325                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 326                 // We should instead work with the Revision object when we need it...
 327                 $this->mContent = $this->mRevision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 328                 $this->mRevIdFetched = $this->mRevision->getId();
 329
 330                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 331
 332                 wfProfileOut( __METHOD__ );
 333
 334                 return $this->mContent;
 335         }
 336
 337         /**
 338          * No-op
 339          * @deprecated since 1.18
 340          */
 341         public function forUpdate() {
 342                 wfDeprecated( __METHOD__, '1.18' );
 343         }
 344
 345         /**
 346          * Returns true if the currently-referenced revision is the current edit
 347          * to this page (and it exists).
 348          * @return bool
 349          */
 350         public function isCurrent() {
 351                 # If no oldid, this is the current version.
 352                 if ( $this->getOldID() == 0 ) {
 353                         return true;
 354                 }
 355
 356                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 357         }
 358
 359         /**
 360          * Use this to fetch the rev ID used on page views
 361          *
 362          * @return int revision ID of last article revision
 363          */
 364         public function getRevIdFetched() {
 365                 if ( $this->mRevIdFetched ) {
 366                         return $this->mRevIdFetched;
 367                 } else {
 368                         return $this->mPage->getLatest();
 369                 }
 370         }
 371
 372         /**
 373          * This is the default action of the index.php entry point: just view the
 374          * page of the given title.
 375          */
 376         public function view() {
 377                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 378                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 379
 380                 wfProfileIn( __METHOD__ );
 381
 382                 # Get variables from query string
 383                 # As side effect this will load the revision and update the title
 384                 # in a revision ID is passed in the request, so this should remain
 385                 # the first call of this method even if $oldid is used way below.
 386                 $oldid = $this->getOldID();
 387
 388                 # Another whitelist check in case getOldID() is altering the title
 389                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $wgUser );
 390                 if ( count( $permErrors ) ) {
 391                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 392                         wfProfileOut( __METHOD__ );
 393                         throw new PermissionsError( 'read', $permErrors );
 394                 }
 395
 396                 # getOldID() may as well want us to redirect somewhere else
 397                 if ( $this->mRedirectUrl ) {
 398                         $wgOut->redirect( $this->mRedirectUrl );
 399                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 400                         wfProfileOut( __METHOD__ );
 401
 402                         return;
 403                 }
 404
 405                 # If we got diff in the query, we want to see a diff page instead of the article.
 406                 if ( $wgRequest->getCheck( 'diff' ) ) {
 407                         wfDebug( __METHOD__ . ": showing diff page\n" );
 408                         $this->showDiffPage();
 409                         wfProfileOut( __METHOD__ );
 410
 411                         return;
 412                 }
 413
 414                 # Set page title (may be overridden by DISPLAYTITLE)
 415                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 416
 417                 $wgOut->setArticleFlag( true );
 418                 # Allow frames by default
 419                 $wgOut->allowClickjacking();
 420
 421                 $parserCache = ParserCache::singleton();
 422
 423                 $parserOptions = $this->getParserOptions();
 424                 # Render printable version, use printable version cache
 425                 if ( $wgOut->isPrintable() ) {
 426                         $parserOptions->setIsPrintable( true );
 427                         $parserOptions->setEditSection( false );
 428                 } elseif ( !$this->getTitle()->quickUserCan( 'edit' ) ) {
 429                         $parserOptions->setEditSection( false );
 430                 }
 431
 432                 # Try client and file cache
 433                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 434                         if ( $wgUseETag ) {
 435                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 436                         }
 437
 438                         # Is it client cached?
 439                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 440                                 wfDebug( __METHOD__ . ": done 304\n" );
 441                                 wfProfileOut( __METHOD__ );
 442
 443                                 return;
 444                         # Try file cache
 445                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 446                                 wfDebug( __METHOD__ . ": done file cache\n" );
 447                                 # tell wgOut that output is taken care of
 448                                 $wgOut->disable();
 449                                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 450                                 wfProfileOut( __METHOD__ );
 451
 452                                 return;
 453                         }
 454                 }
 455
 456                 # Should the parser cache be used?
 457                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 458                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 459                 if ( $wgUser->getStubThreshold() ) {
 460                         wfIncrStats( 'pcache_miss_stub' );
 461                 }
 462
 463                 $this->showRedirectedFromHeader();
 464                 $this->showNamespaceHeader();
 465
 466                 # Iterate through the possible ways of constructing the output text.
 467                 # Keep going until $outputDone is set, or we run out of things to do.
 468                 $pass = 0;
 469                 $outputDone = false;
 470                 $this->mParserOutput = false;
 471
 472                 while ( !$outputDone && ++$pass ) {
 473                         switch( $pass ) {
 474                                 case 1:
 475                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 476                                         break;
 477                                 case 2:
 478                                         # Early abort if the page doesn't exist
 479                                         if ( !$this->mPage->exists() ) {
 480                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 481                                                 $this->showMissingArticle();
 482                                                 wfProfileOut( __METHOD__ );
 483                                                 return;
 484                                         }
 485
 486                                         # Try the parser cache
 487                                         if ( $useParserCache ) {
 488                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 489
 490                                                 if ( $this->mParserOutput !== false ) {
 491                                                         if ( $oldid ) {
 492                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 493                                                                 $this->setOldSubtitle( $oldid );
 494                                                         } else {
 495                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 496                                                         }
 497                                                         $wgOut->addParserOutput( $this->mParserOutput );
 498                                                         # Ensure that UI elements requiring revision ID have
 499                                                         # the correct version information.
 500                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 501                                                         # Preload timestamp to avoid a DB hit
 502                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 503                                                         if ( $cachedTimestamp !== null ) {
 504                                                                 $wgOut->setRevisionTimestamp( $cachedTimestamp );
 505                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 506                                                         }
 507                                                         $outputDone = true;
 508                                                 }
 509                                         }
 510                                         break;
 511                                 case 3:
 512                                         # This will set $this->mRevision if needed
 513                                         $this->fetchContent();
 514
 515                                         # Are we looking at an old revision
 516                                         if ( $oldid && $this->mRevision ) {
 517                                                 $this->setOldSubtitle( $oldid );
 518
 519                                                 if ( !$this->showDeletedRevisionHeader() ) {
 520                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 521                                                         wfProfileOut( __METHOD__ );
 522                                                         return;
 523                                                 }
 524                                         }
 525
 526                                         # Ensure that UI elements requiring revision ID have
 527                                         # the correct version information.
 528                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 529                                         # Preload timestamp to avoid a DB hit
 530                                         $wgOut->setRevisionTimestamp( $this->getTimestamp() );
 531
 532                                         # Pages containing custom CSS or JavaScript get special treatment
 533                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 534                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 535                                                 $this->showCssOrJsPage();
 536                                                 $outputDone = true;
 537                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 538                                                 # Allow extensions do their own custom view for certain pages
 539                                                 $outputDone = true;
 540                                         } else {
 541                                                 $text = $this->getContent();
 542                                                 $rt = Title::newFromRedirectArray( $text );
 543                                                 if ( $rt ) {
 544                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 545                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 546                                                         $wgOut->addHTML( $this->viewRedirect( $rt ) );
 547                                                         # Parse just to get categories, displaytitle, etc.
 548                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 549                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 550                                                         $outputDone = true;
 551                                                 }
 552                                         }
 553                                         break;
 554                                 case 4:
 555                                         # Run the parse, protected by a pool counter
 556                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 557
 558                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 559                                                 $this->getRevIdFetched(), $useParserCache, $this->getContent() );
 560
 561                                         if ( !$poolArticleView->execute() ) {
 562                                                 $error = $poolArticleView->getError();
 563                                                 if ( $error ) {
 564                                                         $wgOut->clearHTML(); // for release() errors
 565                                                         $wgOut->enableClientCache( false );
 566                                                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 567
 568                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 569                                                         $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 570                                                 }
 571                                                 # Connection or timeout error
 572                                                 wfProfileOut( __METHOD__ );
 573                                                 return;
 574                                         }
 575
 576                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 577                                         $wgOut->addParserOutput( $this->mParserOutput );
 578
 579                                         # Don't cache a dirty ParserOutput object
 580                                         if ( $poolArticleView->getIsDirty() ) {
 581                                                 $wgOut->setSquidMaxage( 0 );
 582                                                 $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 583                                         }
 584
 585                                         $outputDone = true;
 586                                         break;
 587                                 # Should be unreachable, but just in case...
 588                                 default:
 589                                         break 2;
 590                         }
 591                 }
 592
 593                 # Get the ParserOutput actually *displayed* here.
 594                 # Note that $this->mParserOutput is the *current* version output.
 595                 $pOutput = ( $outputDone instanceof ParserOutput )
 596                         ? $outputDone // object fetched by hook
 597                         : $this->mParserOutput;
 598
 599                 # Adjust title for main page & pages with displaytitle
 600                 if ( $pOutput ) {
 601                         $this->adjustDisplayTitle( $pOutput );
 602                 }
 603
 604                 # For the main page, overwrite the <title> element with the con-
 605                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 606                 # that's not empty).
 607                 # This message always exists because it is in the i18n files
 608                 if ( $this->getTitle()->isMainPage() ) {
 609                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 610                         if ( !$msg->isDisabled() ) {
 611                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 612                         }
 613                 }
 614
 615                 # Check for any __NOINDEX__ tags on the page using $pOutput
 616                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 617                 $wgOut->setIndexPolicy( $policy['index'] );
 618                 $wgOut->setFollowPolicy( $policy['follow'] );
 619
 620                 $this->showViewFooter();
 621                 $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 622
 623                 wfProfileOut( __METHOD__ );
 624         }
 625
 626         /**
 627          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 628          * @param $pOutput ParserOutput
 629          */
 630         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 631                 global $wgOut;
 632                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 633                 $titleText = $pOutput->getTitleText();
 634                 if ( strval( $titleText ) !== '' ) {
 635                         $wgOut->setPageTitle( $titleText );
 636                 }
 637         }
 638
 639         /**
 640          * Show a diff page according to current request variables. For use within
 641          * Article::view() only, other callers should use the DifferenceEngine class.
 642          */
 643         public function showDiffPage() {
 644                 global $wgRequest, $wgUser;
 645
 646                 $diff = $wgRequest->getVal( 'diff' );
 647                 $rcid = $wgRequest->getVal( 'rcid' );
 648                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 649                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 650                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 651                 $oldid = $this->getOldID();
 652
 653                 $de = new DifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 654                 // DifferenceEngine directly fetched the revision:
 655                 $this->mRevIdFetched = $de->mNewid;
 656                 $de->showDiffPage( $diffOnly );
 657
 658                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 659                         # Run view updates for current revision only
 660                         $this->mPage->doViewUpdates( $this->getContext()->getUser() );
 661                 }
 662         }
 663
 664         /**
 665          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 666          * Article::view() only.
 667          *
 668          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 669          * page views.
 670          */
 671         protected function showCssOrJsPage() {
 672                 global $wgOut;
 673
 674                 $dir = $this->getContext()->getLanguage()->getDir();
 675                 $lang = $this->getContext()->getLanguage()->getCode();
 676
 677                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 678                         'clearyourcache' );
 679
 680                 // Give hooks a chance to customise the output
 681                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 682                         // Wrap the whole lot in a <pre> and don't parse
 683                         $m = array();
 684                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 685                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 686                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 687                         $wgOut->addHTML( "\n</pre>\n" );
 688                 }
 689         }
 690
 691         /**
 692          * Get the robot policy to be used for the current view
 693          * @param $action String the action= GET parameter
 694          * @param $pOutput ParserOutput
 695          * @return Array the policy that should be set
 696          * TODO: actions other than 'view'
 697          */
 698         public function getRobotPolicy( $action, $pOutput ) {
 699                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 700                 global $wgDefaultRobotPolicy, $wgRequest;
 701
 702                 $ns = $this->getTitle()->getNamespace();
 703
 704                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 705                         # Don't index user and user talk pages for blocked users (bug 11443)
 706                         if ( !$this->getTitle()->isSubpage() ) {
 707                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 708                                         return array(
 709                                                 'index'  => 'noindex',
 710                                                 'follow' => 'nofollow'
 711                                         );
 712                                 }
 713                         }
 714                 }
 715
 716                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 717                         # Non-articles (special pages etc), and old revisions
 718                         return array(
 719                                 'index'  => 'noindex',
 720                                 'follow' => 'nofollow'
 721                         );
 722                 } elseif ( $wgOut->isPrintable() ) {
 723                         # Discourage indexing of printable versions, but encourage following
 724                         return array(
 725                                 'index'  => 'noindex',
 726                                 'follow' => 'follow'
 727                         );
 728                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 729                         # For ?curid=x urls, disallow indexing
 730                         return array(
 731                                 'index'  => 'noindex',
 732                                 'follow' => 'follow'
 733                         );
 734                 }
 735
 736                 # Otherwise, construct the policy based on the various config variables.
 737                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 738
 739                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 740                         # Honour customised robot policies for this namespace
 741                         $policy = array_merge(
 742                                 $policy,
 743                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 744                         );
 745                 }
 746                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 747                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 748                         # a final sanity check that we have really got the parser output.
 749                         $policy = array_merge(
 750                                 $policy,
 751                                 array( 'index' => $pOutput->getIndexPolicy() )
 752                         );
 753                 }
 754
 755                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 756                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 757                         $policy = array_merge(
 758                                 $policy,
 759                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 760                         );
 761                 }
 762
 763                 return $policy;
 764         }
 765
 766         /**
 767          * Converts a String robot policy into an associative array, to allow
 768          * merging of several policies using array_merge().
 769          * @param $policy Mixed, returns empty array on null/false/'', transparent
 770          *            to already-converted arrays, converts String.
 771          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 772          */
 773         public static function formatRobotPolicy( $policy ) {
 774                 if ( is_array( $policy ) ) {
 775                         return $policy;
 776                 } elseif ( !$policy ) {
 777                         return array();
 778                 }
 779
 780                 $policy = explode( ',', $policy );
 781                 $policy = array_map( 'trim', $policy );
 782
 783                 $arr = array();
 784                 foreach ( $policy as $var ) {
 785                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 786                                 $arr['index'] = $var;
 787                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 788                                 $arr['follow'] = $var;
 789                         }
 790                 }
 791
 792                 return $arr;
 793         }
 794
 795         /**
 796          * If this request is a redirect view, send "redirected from" subtitle to
 797          * $wgOut. Returns true if the header was needed, false if this is not a
 798          * redirect view. Handles both local and remote redirects.
 799          *
 800          * @return boolean
 801          */
 802         public function showRedirectedFromHeader() {
 803                 global $wgOut, $wgRequest, $wgRedirectSources;
 804
 805                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 806
 807                 if ( isset( $this->mRedirectedFrom ) ) {
 808                         // This is an internally redirected page view.
 809                         // We'll need a backlink to the source page for navigation.
 810                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 811                                 $redir = Linker::linkKnown(
 812                                         $this->mRedirectedFrom,
 813                                         null,
 814                                         array(),
 815                                         array( 'redirect' => 'no' )
 816                                 );
 817
 818                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 819
 820                                 // Set the fragment if one was specified in the redirect
 821                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 822                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 823                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 824                                 }
 825
 826                                 // Add a <link rel="canonical"> tag
 827                                 $wgOut->addLink( array( 'rel' => 'canonical',
 828                                         'href' => $this->getTitle()->getLocalURL() )
 829                                 );
 830
 831                                 // Tell $wgOut the user arrived at this article through a redirect
 832                                 $wgOut->setRedirectedFrom( $this->mRedirectedFrom );
 833
 834                                 return true;
 835                         }
 836                 } elseif ( $rdfrom ) {
 837                         // This is an externally redirected view, from some other wiki.
 838                         // If it was reported from a trusted site, supply a backlink.
 839                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 840                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 841                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 842
 843                                 return true;
 844                         }
 845                 }
 846
 847                 return false;
 848         }
 849
 850         /**
 851          * Show a header specific to the namespace currently being viewed, like
 852          * [[MediaWiki:Talkpagetext]]. For Article::view().
 853          */
 854         public function showNamespaceHeader() {
 855                 global $wgOut;
 856
 857                 if ( $this->getTitle()->isTalkPage() ) {
 858                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 859                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 860                         }
 861                 }
 862         }
 863
 864         /**
 865          * Show the footer section of an ordinary page view
 866          */
 867         public function showViewFooter() {
 868                 global $wgOut;
 869
 870                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 871                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 872                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 873                 }
 874
 875                 # If we have been passed an &rcid= parameter, we want to give the user a
 876                 # chance to mark this new article as patrolled.
 877                 $this->showPatrolFooter();
 878
 879                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 880
 881         }
 882
 883         /**
 884          * If patrol is possible, output a patrol UI box. This is called from the
 885          * footer section of ordinary page views. If patrol is not possible or not
 886          * desired, does nothing.
 887          */
 888         public function showPatrolFooter() {
 889                 global $wgOut, $wgRequest, $wgUser;
 890
 891                 $rcid = $wgRequest->getVal( 'rcid' );
 892
 893                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 894                         return;
 895                 }
 896
 897                 $token = $wgUser->getEditToken( $rcid );
 898                 $wgOut->preventClickjacking();
 899
 900                 $wgOut->addHTML(
 901                         "<div class='patrollink'>" .
 902                                 wfMsgHtml(
 903                                         'markaspatrolledlink',
 904                                         Linker::link(
 905                                                 $this->getTitle(),
 906                                                 wfMsgHtml( 'markaspatrolledtext' ),
 907                                                 array(),
 908                                                 array(
 909                                                         'action' => 'markpatrolled',
 910                                                         'rcid' => $rcid,
 911                                                         'token' => $token,
 912                                                 ),
 913                                                 array( 'known', 'noclasses' )
 914                                         )
 915                                 ) .
 916                         '</div>'
 917                 );
 918         }
 919
 920         /**
 921          * Show the error text for a missing article. For articles in the MediaWiki
 922          * namespace, show the default message text. To be called from Article::view().
 923          */
 924         public function showMissingArticle() {
 925                 global $wgOut, $wgRequest, $wgUser, $wgSend404Code;
 926
 927                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 928                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 929                         $parts = explode( '/', $this->getTitle()->getText() );
 930                         $rootPart = $parts[0];
 931                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 932                         $ip = User::isIP( $rootPart );
 933
 934                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
 935                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
 936                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
 937                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 938                                 LogEventsList::showLogExtract(
 939                                         $wgOut,
 940                                         'block',
 941                                         $user->getUserPage()->getPrefixedText(),
 942                                         '',
 943                                         array(
 944                                                 'lim' => 1,
 945                                                 'showIfEmpty' => false,
 946                                                 'msgKey' => array(
 947                                                         'blocked-notice-logextract',
 948                                                         $user->getName() # Support GENDER in notice
 949                                                 )
 950                                         )
 951                                 );
 952                         }
 953                 }
 954
 955                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
 956
 957                 # Show delete and move logs
 958                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
 959                         array(  'lim' => 10,
 960                                 'conds' => array( "log_action != 'revision'" ),
 961                                 'showIfEmpty' => false,
 962                                 'msgKey' => array( 'moveddeleted-notice' ) )
 963                 );
 964
 965                 # Show error message
 966                 $oldid = $this->getOldID();
 967                 if ( $oldid ) {
 968                         $text = wfMsgNoTrans( 'missing-article',
 969                                 $this->getTitle()->getPrefixedText(),
 970                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
 971                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
 972                         // Use the default message text
 973                         $text = $this->getTitle()->getDefaultMessageText();
 974                 } else {
 975                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
 976                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
 977                         $errors = array_merge( $createErrors, $editErrors );
 978
 979                         if ( !count( $errors ) ) {
 980                                 $text = wfMsgNoTrans( 'noarticletext' );
 981                         } else {
 982                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
 983                         }
 984                 }
 985                 $text = "<div class='noarticletext'>\n$text\n</div>";
 986
 987                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
 988                         // If there's no backing content, send a 404 Not Found
 989                         // for better machine handling of broken links.
 990                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
 991                 }
 992
 993                 $wgOut->addWikiText( $text );
 994         }
 995
 996         /**
 997          * If the revision requested for view is deleted, check permissions.
 998          * Send either an error message or a warning header to $wgOut.
 999          *
1000          * @return boolean true if the view is allowed, false if not.
1001          */
1002         public function showDeletedRevisionHeader() {
1003                 global $wgOut, $wgRequest;
1004
1005                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1006                         // Not deleted
1007                         return true;
1008                 }
1009
1010                 // If the user is not allowed to see it...
1011                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1012                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1013                                 'rev-deleted-text-permission' );
1014
1015                         return false;
1016                 // If the user needs to confirm that they want to see it...
1017                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1018                         # Give explanation and add a link to view the revision...
1019                         $oldid = intval( $this->getOldID() );
1020                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1021                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1022                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1023                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1024                                 array( $msg, $link ) );
1025
1026                         return false;
1027                 // We are allowed to see...
1028                 } else {
1029                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1030                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1031                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1032
1033                         return true;
1034                 }
1035         }
1036
1037         /**
1038          * Generate the navigation links when browsing through an article revisions
1039          * It shows the information as:
1040          *   Revision as of \<date\>; view current revision
1041          *   \<- Previous version | Next Version -\>
1042          *
1043          * @param $oldid String: revision ID of this article revision
1044          */
1045         public function setOldSubtitle( $oldid = 0 ) {
1046                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1047
1048                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1049                         return;
1050                 }
1051
1052                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1053
1054                 # Cascade unhide param in links for easy deletion browsing
1055                 $extraParams = array();
1056                 if ( $wgRequest->getVal( 'unhide' ) ) {
1057                         $extraParams['unhide'] = 1;
1058                 }
1059
1060                 $revision = Revision::newFromId( $oldid );
1061                 $timestamp = $revision->getTimestamp();
1062
1063                 $current = ( $oldid == $this->mPage->getLatest() );
1064                 $td = $wgLang->timeanddate( $timestamp, true );
1065                 $tddate = $wgLang->date( $timestamp, true );
1066                 $tdtime = $wgLang->time( $timestamp, true );
1067
1068                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1069                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1070
1071                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1072                         ? 'revision-info-current'
1073                         : 'revision-info';
1074
1075                 $wgOut->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1076                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1077                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1078
1079                 $lnk = $current
1080                         ? wfMsgHtml( 'currentrevisionlink' )
1081                         : Linker::link(
1082                                 $this->getTitle(),
1083                                 wfMsgHtml( 'currentrevisionlink' ),
1084                                 array(),
1085                                 $extraParams,
1086                                 array( 'known', 'noclasses' )
1087                         );
1088                 $curdiff = $current
1089                         ? wfMsgHtml( 'diff' )
1090                         : Linker::link(
1091                                 $this->getTitle(),
1092                                 wfMsgHtml( 'diff' ),
1093                                 array(),
1094                                 array(
1095                                         'diff' => 'cur',
1096                                         'oldid' => $oldid
1097                                 ) + $extraParams,
1098                                 array( 'known', 'noclasses' )
1099                         );
1100                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1101                 $prevlink = $prev
1102                         ? Linker::link(
1103                                 $this->getTitle(),
1104                                 wfMsgHtml( 'previousrevision' ),
1105                                 array(),
1106                                 array(
1107                                         'direction' => 'prev',
1108                                         'oldid' => $oldid
1109                                 ) + $extraParams,
1110                                 array( 'known', 'noclasses' )
1111                         )
1112                         : wfMsgHtml( 'previousrevision' );
1113                 $prevdiff = $prev
1114                         ? Linker::link(
1115                                 $this->getTitle(),
1116                                 wfMsgHtml( 'diff' ),
1117                                 array(),
1118                                 array(
1119                                         'diff' => 'prev',
1120                                         'oldid' => $oldid
1121                                 ) + $extraParams,
1122                                 array( 'known', 'noclasses' )
1123                         )
1124                         : wfMsgHtml( 'diff' );
1125                 $nextlink = $current
1126                         ? wfMsgHtml( 'nextrevision' )
1127                         : Linker::link(
1128                                 $this->getTitle(),
1129                                 wfMsgHtml( 'nextrevision' ),
1130                                 array(),
1131                                 array(
1132                                         'direction' => 'next',
1133                                         'oldid' => $oldid
1134                                 ) + $extraParams,
1135                                 array( 'known', 'noclasses' )
1136                         );
1137                 $nextdiff = $current
1138                         ? wfMsgHtml( 'diff' )
1139                         : Linker::link(
1140                                 $this->getTitle(),
1141                                 wfMsgHtml( 'diff' ),
1142                                 array(),
1143                                 array(
1144                                         'diff' => 'next',
1145                                         'oldid' => $oldid
1146                                 ) + $extraParams,
1147                                 array( 'known', 'noclasses' )
1148                         );
1149
1150                 $cdel = '';
1151
1152                 // User can delete revisions or view deleted revisions...
1153                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1154                 if ( $canHide || ( $revision->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
1155                         if ( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
1156                                 $cdel = Linker::revDeleteLinkDisabled( $canHide ); // rev was hidden from Sysops
1157                         } else {
1158                                 $query = array(
1159                                         'type'   => 'revision',
1160                                         'target' => $this->getTitle()->getPrefixedDbkey(),
1161                                         'ids'    => $oldid
1162                                 );
1163                                 $cdel = Linker::revDeleteLink( $query, $revision->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1164                         }
1165                         $cdel .= ' ';
1166                 }
1167
1168                 $wgOut->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1169                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1170                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1171         }
1172
1173         /**
1174          * View redirect
1175          *
1176          * @param $target Title|Array of destination(s) to redirect
1177          * @param $appendSubtitle Boolean [optional]
1178          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1179          * @return string containing HMTL with redirect link
1180          */
1181         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1182                 global $wgOut, $wgStylePath;
1183
1184                 if ( !is_array( $target ) ) {
1185                         $target = array( $target );
1186                 }
1187
1188                 $lang = $this->getTitle()->getPageLanguage();
1189                 $imageDir = $lang->getDir();
1190
1191                 if ( $appendSubtitle ) {
1192                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1193                 }
1194
1195                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1196
1197                 /**
1198                  * @var $title Title
1199                  */
1200                 $title = array_shift( $target );
1201
1202                 if ( $forceKnown ) {
1203                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1204                 } else {
1205                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1206                 }
1207
1208                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1209                 $alt = $lang->isRTL() ? '←' : '→';
1210                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1211                 foreach ( $target as $rt ) {
1212                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1213                         if ( $forceKnown ) {
1214                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1215                         } else {
1216                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1217                         }
1218                 }
1219
1220                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1221                 return '<div class="redirectMsg">' .
1222                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1223                         '<span class="redirectText">' . $link . '</span></div>';
1224         }
1225
1226         /**
1227          * Handle action=render
1228          */
1229         public function render() {
1230                 global $wgOut;
1231
1232                 $wgOut->setArticleBodyOnly( true );
1233                 $this->view();
1234         }
1235
1236         /**
1237          * action=protect handler
1238          */
1239         public function protect() {
1240                 $form = new ProtectionForm( $this );
1241                 $form->execute();
1242         }
1243
1244         /**
1245          * action=unprotect handler (alias)
1246          */
1247         public function unprotect() {
1248                 $this->protect();
1249         }
1250
1251         /**
1252          * UI entry point for page deletion
1253          */
1254         public function delete() {
1255                 global $wgOut, $wgRequest, $wgLang;
1256
1257                 # This code desperately needs to be totally rewritten
1258
1259                 $title = $this->getTitle();
1260                 $user = $this->getContext()->getUser();
1261
1262                 # Check permissions
1263                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1264                 if ( count( $permission_errors ) ) {
1265                         throw new PermissionsError( 'delete', $permission_errors );
1266                 }
1267
1268                 # Read-only check...
1269                 if ( wfReadOnly() ) {
1270                         throw new ReadOnlyError;
1271                 }
1272
1273                 # Better double-check that it hasn't been deleted yet!
1274                 $dbw = wfGetDB( DB_MASTER );
1275                 $conds = $title->pageCond();
1276                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1277                 if ( $latest === false ) {
1278                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1279                         $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1280                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1281                                 );
1282                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1283                         LogEventsList::showLogExtract(
1284                                 $wgOut,
1285                                 'delete',
1286                                 $title->getPrefixedText()
1287                         );
1288
1289                         return;
1290                 }
1291
1292                 # Hack for big sites
1293                 $bigHistory = $this->mPage->isBigDeletion();
1294                 if ( $bigHistory && !$title->userCan( 'bigdelete' ) ) {
1295                         global $wgDeleteRevisionsLimit;
1296
1297                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1298                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1299                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1300
1301                         return;
1302                 }
1303
1304                 $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1305                 $deleteReason = $wgRequest->getText( 'wpReason' );
1306
1307                 if ( $deleteReasonList == 'other' ) {
1308                         $reason = $deleteReason;
1309                 } elseif ( $deleteReason != '' ) {
1310                         // Entry from drop down menu + additional comment
1311                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1312                 } else {
1313                         $reason = $deleteReasonList;
1314                 }
1315
1316                 if ( $wgRequest->wasPosted() && $user->matchEditToken( $wgRequest->getVal( 'wpEditToken' ),
1317                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1318                 {
1319                         # Flag to hide all contents of the archived revisions
1320                         $suppress = $wgRequest->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1321
1322                         $this->doDelete( $reason, $suppress );
1323
1324                         if ( $wgRequest->getCheck( 'wpWatch' ) && $user->isLoggedIn() ) {
1325                                 $this->doWatch();
1326                         } elseif ( $title->userIsWatching() ) {
1327                                 $this->doUnwatch();
1328                         }
1329
1330                         return;
1331                 }
1332
1333                 // Generate deletion reason
1334                 $hasHistory = false;
1335                 if ( !$reason ) {
1336                         $reason = $this->generateReason( $hasHistory );
1337                 }
1338
1339                 // If the page has a history, insert a warning
1340                 if ( $hasHistory ) {
1341                         $revisions = $this->mPage->estimateRevisionCount();
1342                         // @todo FIXME: i18n issue/patchwork message
1343                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1344                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1345                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1346                                         wfMsgHtml( 'history' ),
1347                                         array( 'rel' => 'archives' ),
1348                                         array( 'action' => 'history' ) ) .
1349                                 '</strong>'
1350                         );
1351
1352                         if ( $bigHistory ) {
1353                                 global $wgDeleteRevisionsLimit;
1354                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1355                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1356                         }
1357                 }
1358
1359                 return $this->confirmDelete( $reason );
1360         }
1361
1362         /**
1363          * Output deletion confirmation dialog
1364          * @todo FIXME: Move to another file?
1365          * @param $reason String: prefilled reason
1366          */
1367         public function confirmDelete( $reason ) {
1368                 global $wgOut;
1369
1370                 wfDebug( "Article::confirmDelete\n" );
1371
1372                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1373                 $wgOut->addBacklinkSubtitle( $this->getTitle() );
1374                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1375                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1376
1377                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1378
1379                 $user = $this->getContext()->getUser();
1380
1381                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1382                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1383                                         <td></td>
1384                                         <td class='mw-input'><strong>" .
1385                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1386                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1387                                         "</strong></td>
1388                                 </tr>";
1389                 } else {
1390                         $suppress = '';
1391                 }
1392                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1393
1394                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1395                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1396                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1397                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1398                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1399                         "<tr id=\"wpDeleteReasonListRow\">
1400                                 <td class='mw-label'>" .
1401                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1402                                 "</td>
1403                                 <td class='mw-input'>" .
1404                                         Xml::listDropDown( 'wpDeleteReasonList',
1405                                                 wfMsgForContent( 'deletereason-dropdown' ),
1406                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1407                                 "</td>
1408                         </tr>
1409                         <tr id=\"wpDeleteReasonRow\">
1410                                 <td class='mw-label'>" .
1411                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1412                                 "</td>
1413                                 <td class='mw-input'>" .
1414                                 Html::input( 'wpReason', $reason, 'text', array(
1415                                         'size' => '60',
1416                                         'maxlength' => '255',
1417                                         'tabindex' => '2',
1418                                         'id' => 'wpReason',
1419                                         'autofocus'
1420                                 ) ) .
1421                                 "</td>
1422                         </tr>";
1423
1424                 # Disallow watching if user is not logged in
1425                 if ( $user->isLoggedIn() ) {
1426                         $form .= "
1427                         <tr>
1428                                 <td></td>
1429                                 <td class='mw-input'>" .
1430                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1431                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1432                                 "</td>
1433                         </tr>";
1434                 }
1435
1436                 $form .= "
1437                         $suppress
1438                         <tr>
1439                                 <td></td>
1440                                 <td class='mw-submit'>" .
1441                                         Xml::submitButton( wfMsg( 'deletepage' ),
1442                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1443                                 "</td>
1444                         </tr>" .
1445                         Xml::closeElement( 'table' ) .
1446                         Xml::closeElement( 'fieldset' ) .
1447                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1448                         Xml::closeElement( 'form' );
1449
1450                         if ( $user->isAllowed( 'editinterface' ) ) {
1451                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1452                                 $link = Linker::link(
1453                                         $title,
1454                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1455                                         array(),
1456                                         array( 'action' => 'edit' )
1457                                 );
1458                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1459                         }
1460
1461                 $wgOut->addHTML( $form );
1462                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1463                 LogEventsList::showLogExtract( $wgOut, 'delete',
1464                         $this->getTitle()->getPrefixedText()
1465                 );
1466         }
1467
1468         /**
1469          * Perform a deletion and output success or failure messages
1470          * @param $reason
1471          * @param $suppress bool
1472          */
1473         public function doDelete( $reason, $suppress = false ) {
1474                 global $wgOut;
1475
1476                 $id = $this->getTitle()->getArticleID( Title::GAID_FOR_UPDATE );
1477
1478                 $error = '';
1479                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, $id, true, $error ) ) {
1480                         $deleted = $this->getTitle()->getPrefixedText();
1481
1482                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1483                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1484
1485                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1486
1487                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1488                         $wgOut->returnToMain( false );
1489                 } else {
1490                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1491                         if ( $error == '' ) {
1492                                 $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1493                                         array( 'cannotdelete', wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1494                                 );
1495                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1496
1497                                 LogEventsList::showLogExtract(
1498                                         $wgOut,
1499                                         'delete',
1500                                         $this->getTitle()->getPrefixedText()
1501                                 );
1502                         } else {
1503                                 $wgOut->addHTML( $error );
1504                         }
1505                 }
1506         }
1507
1508         /* Caching functions */
1509
1510         /**
1511          * checkLastModified returns true if it has taken care of all
1512          * output to the client that is necessary for this request.
1513          * (that is, it has sent a cached version of the page)
1514          *
1515          * @return boolean true if cached version send, false otherwise
1516          */
1517         protected function tryFileCache() {
1518                 static $called = false;
1519
1520                 if ( $called ) {
1521                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1522                         return false;
1523                 }
1524
1525                 $called = true;
1526                 if ( $this->isFileCacheable() ) {
1527                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1528                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1529                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1530                                 $cache->loadFromFileCache( $this->getContext() );
1531                                 return true;
1532                         } else {
1533                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1534                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1535                         }
1536                 } else {
1537                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1538                 }
1539
1540                 return false;
1541         }
1542
1543         /**
1544          * Check if the page can be cached
1545          * @return bool
1546          */
1547         public function isFileCacheable() {
1548                 $cacheable = false;
1549
1550                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1551                         $cacheable = $this->mPage->getID()
1552                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1553                         // Extension may have reason to disable file caching on some pages.
1554                         if ( $cacheable ) {
1555                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1556                         }
1557                 }
1558
1559                 return $cacheable;
1560         }
1561
1562         /**#@-*/
1563
1564         /**
1565          * Lightweight method to get the parser output for a page, checking the parser cache
1566          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1567          * consider, so it's not appropriate to use there.
1568          *
1569          * @since 1.16 (r52326) for LiquidThreads
1570          *
1571          * @param $oldid mixed integer Revision ID or null
1572          * @param $user User The relevant user
1573          * @return ParserOutput or false if the given revsion ID is not found
1574          */
1575         public function getParserOutput( $oldid = null, User $user = null ) {
1576                 global $wgUser;
1577
1578                 $user = is_null( $user ) ? $wgUser : $user;
1579                 $parserOptions = $this->mPage->makeParserOptions( $user );
1580
1581                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1582         }
1583
1584         /**
1585          * Get parser options suitable for rendering the primary article wikitext
1586          * @return ParserOptions|false
1587          */
1588         public function getParserOptions() {
1589                 global $wgUser;
1590                 if ( !$this->mParserOptions ) {
1591                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
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 $wgUser'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                 global $wgUser;
1686                 wfDeprecated( __METHOD__, '1.18' );
1687                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1688         }
1689
1690         /**
1691          * User interface handler for the "unwatch" action.
1692          * Requires Request to pass a token as of 1.18.
1693          * @deprecated since 1.18
1694          */
1695         public function unwatch() {
1696                 wfDeprecated( __METHOD__, '1.18' );
1697                 Action::factory( 'unwatch', $this )->show();
1698         }
1699
1700         /**
1701          * Stop watching a page
1702          * @return bool true on successful unwatch
1703          * @deprecated since 1.18
1704          */
1705         public function doUnwatch() {
1706                 global $wgUser;
1707                 wfDeprecated( __METHOD__, '1.18' );
1708                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1709         }
1710
1711         /**
1712          * Output a redirect back to the article.
1713          * This is typically used after an edit.
1714          *
1715          * @deprecated in 1.18; call $wgOut->redirect() directly
1716          * @param $noRedir Boolean: add redirect=no
1717          * @param $sectionAnchor String: section to redirect to, including "#"
1718          * @param $extraQuery String: extra query params
1719          */
1720         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1721                 wfDeprecated( __METHOD__, '1.18' );
1722                 global $wgOut;
1723
1724                 if ( $noRedir ) {
1725                         $query = 'redirect=no';
1726                         if ( $extraQuery )
1727                                 $query .= "&$extraQuery";
1728                 } else {
1729                         $query = $extraQuery;
1730                 }
1731
1732                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1733         }
1734
1735         /**
1736          * Use PHP's magic __get handler to handle accessing of
1737          * raw WikiPage fields for backwards compatibility.
1738          *
1739          * @param $fname String Field name
1740          */
1741         public function __get( $fname ) {
1742                 if ( property_exists( $this->mPage, $fname ) ) {
1743                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1744                         return $this->mPage->$fname;
1745                 }
1746                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1747         }
1748
1749         /**
1750          * Use PHP's magic __set handler to handle setting of
1751          * raw WikiPage fields for backwards compatibility.
1752          *
1753          * @param $fname String Field name
1754          * @param $fvalue mixed New value
1755          */
1756         public function __set( $fname, $fvalue ) {
1757                 if ( property_exists( $this->mPage, $fname ) ) {
1758                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1759                         $this->mPage->$fname = $fvalue;
1760                 // Note: extensions may want to toss on new fields
1761                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1762                         $this->mPage->$fname = $fvalue;
1763                 } else {
1764                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1765                 }
1766         }
1767
1768         /**
1769          * Use PHP's magic __call handler to transform instance calls to
1770          * WikiPage functions for backwards compatibility.
1771          *
1772          * @param $fname String Name of called method
1773          * @param $args Array Arguments to the method
1774          */
1775         public function __call( $fname, $args ) {
1776                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1777                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1778                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1779                 }
1780                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1781         }
1782
1783         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1784
1785         /**
1786          * @param $limit array
1787          * @param $expiry array
1788          * @param $cascade bool
1789          * @param $reason string
1790          * @param $user User
1791          * @return Status
1792          */
1793         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1794                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1795         }
1796
1797         /**
1798          * @param $limit array
1799          * @param $reason string
1800          * @param $cascade int
1801          * @param $expiry array
1802          * @return bool
1803          */
1804         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1805                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1806         }
1807
1808         /**
1809          * @param $reason string
1810          * @param $suppress bool
1811          * @param $id int
1812          * @param $commit bool
1813          * @param $error string
1814          * @return bool
1815          */
1816         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1817                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1818         }
1819
1820         /**
1821          * @param $fromP
1822          * @param $summary
1823          * @param $token
1824          * @param $bot
1825          * @param $resultDetails
1826          * @param $user User
1827          * @return array
1828          */
1829         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1830                 global $wgUser;
1831                 $user = is_null( $user ) ? $wgUser : $user;
1832                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1833         }
1834
1835         /**
1836          * @param $fromP
1837          * @param $summary
1838          * @param $bot
1839          * @param $resultDetails
1840          * @param $guser User
1841          * @return array
1842          */
1843         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1844                 global $wgUser;
1845                 $guser = is_null( $guser ) ? $wgUser : $guser;
1846                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1847         }
1848
1849         /**
1850          * @param $hasHistory bool
1851          * @return mixed
1852          */
1853         public function generateReason( &$hasHistory ) {
1854                 return $this->mPage->getAutoDeleteReason( $hasHistory );
1855         }
1856
1857         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1858
1859         /**
1860          * @return array
1861          */
1862         public static function selectFields() {
1863                 return WikiPage::selectFields();
1864         }
1865
1866         /**
1867          * @param $title Title
1868          */
1869         public static function onArticleCreate( $title ) {
1870                 WikiPage::onArticleCreate( $title );
1871         }
1872
1873         /**
1874          * @param $title Title
1875          */
1876         public static function onArticleDelete( $title ) {
1877                 WikiPage::onArticleDelete( $title );
1878         }
1879
1880         /**
1881          * @param $title Title
1882          */
1883         public static function onArticleEdit( $title ) {
1884                 WikiPage::onArticleEdit( $title );
1885         }
1886
1887         /**
1888          * @param $oldtext
1889          * @param $newtext
1890          * @param $flags
1891          * @return string
1892          */
1893         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1894                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1895         }
1896         // ******
1897 }