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