includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class for viewing MediaWiki article and history.
   9  *
  10  * This maintains WikiPage functions for backwards compatibility.
  11  *
  12  * @TODO: move and rewrite code to an Action class
  13  *
  14  * See design.txt for an overview.
  15  * Note: edit user interface and cache support functions have been
  16  * moved to separate EditPage and HTMLFileCache classes.
  17  *
  18  * @internal documentation reviewed 15 Mar 2010
  19  */
  20 class Article extends Page {
  21         /**@{{
  22          * @private
  23          */
  24
  25         /**
  26          * @var IContextSource
  27          */
  28         protected $mContext;
  29
  30         /**
  31          * @var WikiPage
  32          */
  33         protected $mPage;
  34
  35         /**
  36          * @var ParserOptions: ParserOptions object for $wgUser articles
  37          */
  38         public $mParserOptions;
  39
  40         var $mContent;                    // !<
  41         var $mContentLoaded = false;      // !<
  42         var $mOldId;                      // !<
  43
  44         /**
  45          * @var Title
  46          */
  47         var $mRedirectedFrom = null;
  48
  49         /**
  50          * @var mixed: boolean false or URL string
  51          */
  52         var $mRedirectUrl = false;        // !<
  53         var $mRevIdFetched = 0;           // !<
  54
  55         /**
  56          * @var Revision
  57          */
  58         var $mRevision = null;
  59
  60         /**
  61          * @var ParserOutput
  62          */
  63         var $mParserOutput;
  64
  65         /**@}}*/
  66
  67         /**
  68          * Constructor and clear the article
  69          * @param $title Title Reference to a Title object.
  70          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  71          */
  72         public function __construct( Title $title, $oldId = null ) {
  73                 $this->mOldId = $oldId;
  74                 $this->mPage = $this->newPage( $title );
  75         }
  76
  77         /**
  78          * @param $title Title
  79          * @return WikiPage
  80          */
  81         protected function newPage( Title $title ) {
  82                 return new WikiPage( $title );
  83         }
  84
  85         /**
  86          * Constructor from a page id
  87          * @param $id Int article ID to load
  88          * @return Article|null
  89          */
  90         public static function newFromID( $id ) {
  91                 $t = Title::newFromID( $id );
  92                 # @todo FIXME: Doesn't inherit right
  93                 return $t == null ? null : new self( $t );
  94                 # return $t == null ? null : new static( $t ); // PHP 5.3
  95         }
  96
  97         /**
  98          * Create an Article object of the appropriate class for the given page.
  99          *
 100          * @param $title Title
 101          * @param $context IContextSource
 102          * @return Article object
 103          */
 104         public static function newFromTitle( $title, IContextSource $context ) {
 105                 if ( NS_MEDIA == $title->getNamespace() ) {
 106                         // FIXME: where should this go?
 107                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 108                 }
 109
 110                 $page = null;
 111                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 112                 if ( !$page ) {
 113                         switch( $title->getNamespace() ) {
 114                                 case NS_FILE:
 115                                         $page = new ImagePage( $title );
 116                                         break;
 117                                 case NS_CATEGORY:
 118                                         $page = new CategoryPage( $title );
 119                                         break;
 120                                 default:
 121                                         $page = new Article( $title );
 122                         }
 123                 }
 124                 $page->setContext( $context );
 125
 126                 return $page;
 127         }
 128
 129         /**
 130          * Create an Article object of the appropriate class for the given page.
 131          *
 132          * @param $page WikiPage
 133          * @param $context IContextSource
 134          * @return Article object
 135          */
 136         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 137                 $article = self::newFromTitle( $page->getTitle(), $context );
 138                 $article->mPage = $page; // override to keep process cached vars
 139                 return $article;
 140         }
 141
 142         /**
 143          * Tell the page view functions that this view was redirected
 144          * from another page on the wiki.
 145          * @param $from Title object.
 146          */
 147         public function setRedirectedFrom( Title $from ) {
 148                 $this->mRedirectedFrom = $from;
 149         }
 150
 151         /**
 152          * Get the title object of the article
 153          *
 154          * @return Title object of this page
 155          */
 156         public function getTitle() {
 157                 return $this->mPage->getTitle();
 158         }
 159
 160         /**
 161          * Get the WikiPage object of this instance
 162          *
 163          * @since 1.19
 164          * @return WikiPage
 165          */
 166         public function getPage() {
 167                 return $this->mPage;
 168         }
 169
 170         /**
 171          * Clear the object
 172          */
 173         public function clear() {
 174                 $this->mContentLoaded = false;
 175
 176                 $this->mRedirectedFrom = null; # Title object if set
 177                 $this->mRevIdFetched = 0;
 178                 $this->mRedirectUrl = false;
 179
 180                 $this->mPage->clear();
 181         }
 182
 183         /**
 184          * Note that getContent/loadContent do not follow redirects anymore.
 185          * If you need to fetch redirectable content easily, try
 186          * the shortcut in WikiPage::getRedirectTarget()
 187          *
 188          * This function has side effects! Do not use this function if you
 189          * only want the real revision text if any.
 190          *
 191          * @return Return the text of this revision
 192          */
 193         public function getContent() {
 194                 global $wgUser;
 195
 196                 wfProfileIn( __METHOD__ );
 197
 198                 if ( $this->mPage->getID() === 0 ) {
 199                         # If this is a MediaWiki:x message, then load the messages
 200                         # and return the message value for x.
 201                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 202                                 $text = $this->getTitle()->getDefaultMessageText();
 203                                 if ( $text === false ) {
 204                                         $text = '';
 205                                 }
 206                         } else {
 207                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 208                         }
 209                         wfProfileOut( __METHOD__ );
 210
 211                         return $text;
 212                 } else {
 213                         $this->fetchContent();
 214                         wfProfileOut( __METHOD__ );
 215
 216                         return $this->mContent;
 217                 }
 218         }
 219
 220         /**
 221          * @return int The oldid of the article that is to be shown, 0 for the
 222          *             current revision
 223          */
 224         public function getOldID() {
 225                 if ( is_null( $this->mOldId ) ) {
 226                         $this->mOldId = $this->getOldIDFromRequest();
 227                 }
 228
 229                 return $this->mOldId;
 230         }
 231
 232         /**
 233          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 234          *
 235          * @return int The old id for the request
 236          */
 237         public function getOldIDFromRequest() {
 238                 global $wgRequest;
 239
 240                 $this->mRedirectUrl = false;
 241
 242                 $oldid = $wgRequest->getIntOrNull( 'oldid' );
 243
 244                 if ( $oldid === null ) {
 245                         return 0;
 246                 }
 247
 248                 if ( $oldid !== 0 ) {
 249                         # Load the given revision and check whether the page is another one.
 250                         # In that case, update this instance to reflect the change.
 251                         $this->mRevision = Revision::newFromId( $oldid );
 252                         if ( $this->mRevision !== null ) {
 253                                 // Revision title doesn't match the page title given?
 254                                 if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 255                                         $function = array( get_class( $this->mPage ), 'newFromID' );
 256                                         $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 257                                 }
 258                         }
 259                 }
 260
 261                 if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 262                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 263                         if ( $nextid ) {
 264                                 $oldid = $nextid;
 265                         } else {
 266                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 267                         }
 268                 } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 269                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 270                         if ( $previd ) {
 271                                 $oldid = $previd;
 272                         }
 273                 }
 274
 275                 return $oldid;
 276         }
 277
 278         /**
 279          * Load the revision (including text) into this object
 280          *
 281          * @deprecated in 1.19; use fetchContent()
 282          */
 283         function loadContent() {
 284                 wfDeprecated( __METHOD__, '1.19' );
 285                 $this->fetchContent();
 286         }
 287
 288         /**
 289          * Get text of an article from database
 290          * Does *NOT* follow redirects.
 291          *
 292          * @return mixed string containing article contents, or false if null
 293          */
 294         function fetchContent() {
 295                 if ( $this->mContentLoaded ) {
 296                         return $this->mContent;
 297                 }
 298
 299                 wfProfileIn( __METHOD__ );
 300
 301                 $this->mContentLoaded = true;
 302
 303                 $oldid = $this->getOldID();
 304
 305                 # Pre-fill content with error message so that if something
 306                 # fails we'll have something telling us what we intended.
 307                 $t = $this->getTitle()->getPrefixedText();
 308                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 309                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 310
 311                 if ( $oldid ) {
 312                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 313                         if ( !$this->mRevision ) {
 314                                 $this->mRevision = Revision::newFromId( $oldid );
 315                                 if ( !$this->mRevision ) {
 316                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 317                                         wfProfileOut( __METHOD__ );
 318                                         return false;
 319                                 }
 320                         }
 321                 } else {
 322                         if ( !$this->mPage->getLatest() ) {
 323                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 324                                 wfProfileOut( __METHOD__ );
 325                                 return false;
 326                         }
 327
 328                         $this->mRevision = $this->mPage->getRevision();
 329                         if ( !$this->mRevision ) {
 330                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 331                                 wfProfileOut( __METHOD__ );
 332                                 return false;
 333                         }
 334                 }
 335
 336                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 337                 // We should instead work with the Revision object when we need it...
 338                 $this->mContent = $this->mRevision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 339                 $this->mRevIdFetched = $this->mRevision->getId();
 340
 341                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 342
 343                 wfProfileOut( __METHOD__ );
 344
 345                 return $this->mContent;
 346         }
 347
 348         /**
 349          * No-op
 350          * @deprecated since 1.18
 351          */
 352         public function forUpdate() {
 353                 wfDeprecated( __METHOD__, '1.18' );
 354         }
 355
 356         /**
 357          * Returns true if the currently-referenced revision is the current edit
 358          * to this page (and it exists).
 359          * @return bool
 360          */
 361         public function isCurrent() {
 362                 # If no oldid, this is the current version.
 363                 if ( $this->getOldID() == 0 ) {
 364                         return true;
 365                 }
 366
 367                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 368         }
 369
 370         /**
 371          * Get the fetched Revision object depending on request parameters or null
 372          * on failure.
 373          *
 374          * @since 1.19
 375          * @return Revision|null
 376          */
 377         public function getRevisionFetched() {
 378                 $this->fetchContent();
 379
 380                 return $this->mRevision;
 381         }
 382
 383         /**
 384          * Use this to fetch the rev ID used on page views
 385          *
 386          * @return int revision ID of last article revision
 387          */
 388         public function getRevIdFetched() {
 389                 if ( $this->mRevIdFetched ) {
 390                         return $this->mRevIdFetched;
 391                 } else {
 392                         return $this->mPage->getLatest();
 393                 }
 394         }
 395
 396         /**
 397          * This is the default action of the index.php entry point: just view the
 398          * page of the given title.
 399          */
 400         public function view() {
 401                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 402                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 403
 404                 wfProfileIn( __METHOD__ );
 405
 406                 # Get variables from query string
 407                 # As side effect this will load the revision and update the title
 408                 # in a revision ID is passed in the request, so this should remain
 409                 # the first call of this method even if $oldid is used way below.
 410                 $oldid = $this->getOldID();
 411
 412                 # Another whitelist check in case getOldID() is altering the title
 413                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $wgUser );
 414                 if ( count( $permErrors ) ) {
 415                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 416                         wfProfileOut( __METHOD__ );
 417                         throw new PermissionsError( 'read', $permErrors );
 418                 }
 419
 420                 # getOldID() may as well want us to redirect somewhere else
 421                 if ( $this->mRedirectUrl ) {
 422                         $wgOut->redirect( $this->mRedirectUrl );
 423                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 424                         wfProfileOut( __METHOD__ );
 425
 426                         return;
 427                 }
 428
 429                 # If we got diff in the query, we want to see a diff page instead of the article.
 430                 if ( $wgRequest->getCheck( 'diff' ) ) {
 431                         wfDebug( __METHOD__ . ": showing diff page\n" );
 432                         $this->showDiffPage();
 433                         wfProfileOut( __METHOD__ );
 434
 435                         return;
 436                 }
 437
 438                 # Set page title (may be overridden by DISPLAYTITLE)
 439                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 440
 441                 $wgOut->setArticleFlag( true );
 442                 # Allow frames by default
 443                 $wgOut->allowClickjacking();
 444
 445                 $parserCache = ParserCache::singleton();
 446
 447                 $parserOptions = $this->getParserOptions();
 448                 # Render printable version, use printable version cache
 449                 if ( $wgOut->isPrintable() ) {
 450                         $parserOptions->setIsPrintable( true );
 451                         $parserOptions->setEditSection( false );
 452                 } elseif ( !$this->getTitle()->quickUserCan( 'edit' ) ) {
 453                         $parserOptions->setEditSection( false );
 454                 }
 455
 456                 # Try client and file cache
 457                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 458                         if ( $wgUseETag ) {
 459                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 460                         }
 461
 462                         # Is it client cached?
 463                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 464                                 wfDebug( __METHOD__ . ": done 304\n" );
 465                                 wfProfileOut( __METHOD__ );
 466
 467                                 return;
 468                         # Try file cache
 469                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 470                                 wfDebug( __METHOD__ . ": done file cache\n" );
 471                                 # tell wgOut that output is taken care of
 472                                 $wgOut->disable();
 473                                 $this->mPage->doViewUpdates( $wgUser );
 474                                 wfProfileOut( __METHOD__ );
 475
 476                                 return;
 477                         }
 478                 }
 479
 480                 # Should the parser cache be used?
 481                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 482                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 483                 if ( $wgUser->getStubThreshold() ) {
 484                         wfIncrStats( 'pcache_miss_stub' );
 485                 }
 486
 487                 $this->showRedirectedFromHeader();
 488                 $this->showNamespaceHeader();
 489
 490                 # Iterate through the possible ways of constructing the output text.
 491                 # Keep going until $outputDone is set, or we run out of things to do.
 492                 $pass = 0;
 493                 $outputDone = false;
 494                 $this->mParserOutput = false;
 495
 496                 while ( !$outputDone && ++$pass ) {
 497                         switch( $pass ) {
 498                                 case 1:
 499                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 500                                         break;
 501                                 case 2:
 502                                         # Early abort if the page doesn't exist
 503                                         if ( !$this->mPage->exists() ) {
 504                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 505                                                 $this->showMissingArticle();
 506                                                 wfProfileOut( __METHOD__ );
 507                                                 return;
 508                                         }
 509
 510                                         # Try the parser cache
 511                                         if ( $useParserCache ) {
 512                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 513
 514                                                 if ( $this->mParserOutput !== false ) {
 515                                                         if ( $oldid ) {
 516                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 517                                                                 $this->setOldSubtitle( $oldid );
 518                                                         } else {
 519                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 520                                                         }
 521                                                         $wgOut->addParserOutput( $this->mParserOutput );
 522                                                         # Ensure that UI elements requiring revision ID have
 523                                                         # the correct version information.
 524                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 525                                                         # Preload timestamp to avoid a DB hit
 526                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 527                                                         if ( $cachedTimestamp !== null ) {
 528                                                                 $wgOut->setRevisionTimestamp( $cachedTimestamp );
 529                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 530                                                         }
 531                                                         $outputDone = true;
 532                                                 }
 533                                         }
 534                                         break;
 535                                 case 3:
 536                                         # This will set $this->mRevision if needed
 537                                         $this->fetchContent();
 538
 539                                         # Are we looking at an old revision
 540                                         if ( $oldid && $this->mRevision ) {
 541                                                 $this->setOldSubtitle( $oldid );
 542
 543                                                 if ( !$this->showDeletedRevisionHeader() ) {
 544                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 545                                                         wfProfileOut( __METHOD__ );
 546                                                         return;
 547                                                 }
 548                                         }
 549
 550                                         # Ensure that UI elements requiring revision ID have
 551                                         # the correct version information.
 552                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 553                                         # Preload timestamp to avoid a DB hit
 554                                         $wgOut->setRevisionTimestamp( $this->getTimestamp() );
 555
 556                                         # Pages containing custom CSS or JavaScript get special treatment
 557                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 558                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 559                                                 $this->showCssOrJsPage();
 560                                                 $outputDone = true;
 561                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 562                                                 # Allow extensions do their own custom view for certain pages
 563                                                 $outputDone = true;
 564                                         } else {
 565                                                 $text = $this->getContent();
 566                                                 $rt = Title::newFromRedirectArray( $text );
 567                                                 if ( $rt ) {
 568                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 569                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 570                                                         $wgOut->addHTML( $this->viewRedirect( $rt ) );
 571                                                         # Parse just to get categories, displaytitle, etc.
 572                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 573                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 574                                                         $outputDone = true;
 575                                                 }
 576                                         }
 577                                         break;
 578                                 case 4:
 579                                         # Run the parse, protected by a pool counter
 580                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 581
 582                                         $poolArticleView = new PoolWorkArticleView( $this, $parserOptions,
 583                                                 $this->getRevIdFetched(), $useParserCache, $this->getContent() );
 584
 585                                         if ( !$poolArticleView->execute() ) {
 586                                                 $error = $poolArticleView->getError();
 587                                                 if ( $error ) {
 588                                                         $wgOut->clearHTML(); // for release() errors
 589                                                         $wgOut->enableClientCache( false );
 590                                                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 591
 592                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 593                                                         $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 594                                                 }
 595                                                 # Connection or timeout error
 596                                                 wfProfileOut( __METHOD__ );
 597                                                 return;
 598                                         }
 599
 600                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 601                                         $wgOut->addParserOutput( $this->mParserOutput );
 602
 603                                         # Don't cache a dirty ParserOutput object
 604                                         if ( $poolArticleView->getIsDirty() ) {
 605                                                 $wgOut->setSquidMaxage( 0 );
 606                                                 $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 607                                         }
 608
 609                                         $outputDone = true;
 610                                         break;
 611                                 # Should be unreachable, but just in case...
 612                                 default:
 613                                         break 2;
 614                         }
 615                 }
 616
 617                 # Get the ParserOutput actually *displayed* here.
 618                 # Note that $this->mParserOutput is the *current* version output.
 619                 $pOutput = ( $outputDone instanceof ParserOutput )
 620                         ? $outputDone // object fetched by hook
 621                         : $this->mParserOutput;
 622
 623                 # Adjust title for main page & pages with displaytitle
 624                 if ( $pOutput ) {
 625                         $this->adjustDisplayTitle( $pOutput );
 626                 }
 627
 628                 # For the main page, overwrite the <title> element with the con-
 629                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 630                 # that's not empty).
 631                 # This message always exists because it is in the i18n files
 632                 if ( $this->getTitle()->isMainPage() ) {
 633                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 634                         if ( !$msg->isDisabled() ) {
 635                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 636                         }
 637                 }
 638
 639                 # Check for any __NOINDEX__ tags on the page using $pOutput
 640                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 641                 $wgOut->setIndexPolicy( $policy['index'] );
 642                 $wgOut->setFollowPolicy( $policy['follow'] );
 643
 644                 $this->showViewFooter();
 645                 $this->mPage->doViewUpdates( $wgUser );
 646
 647                 wfProfileOut( __METHOD__ );
 648         }
 649
 650         /**
 651          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 652          * @param $pOutput ParserOutput
 653          */
 654         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 655                 global $wgOut;
 656                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 657                 $titleText = $pOutput->getTitleText();
 658                 if ( strval( $titleText ) !== '' ) {
 659                         $wgOut->setPageTitle( $titleText );
 660                 }
 661         }
 662
 663         /**
 664          * Show a diff page according to current request variables. For use within
 665          * Article::view() only, other callers should use the DifferenceEngine class.
 666          */
 667         public function showDiffPage() {
 668                 global $wgRequest, $wgUser;
 669
 670                 $diff = $wgRequest->getVal( 'diff' );
 671                 $rcid = $wgRequest->getVal( 'rcid' );
 672                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 673                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 674                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 675                 $oldid = $this->getOldID();
 676
 677                 $de = new DifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 678                 // DifferenceEngine directly fetched the revision:
 679                 $this->mRevIdFetched = $de->mNewid;
 680                 $de->showDiffPage( $diffOnly );
 681
 682                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 683                         # Run view updates for current revision only
 684                         $this->mPage->doViewUpdates( $wgUser );
 685                 }
 686         }
 687
 688         /**
 689          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 690          * Article::view() only.
 691          *
 692          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 693          * page views.
 694          */
 695         protected function showCssOrJsPage() {
 696                 global $wgOut;
 697
 698                 $dir = $this->getContext()->getLanguage()->getDir();
 699                 $lang = $this->getContext()->getLanguage()->getCode();
 700
 701                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 702                         'clearyourcache' );
 703
 704                 // Give hooks a chance to customise the output
 705                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 706                         // Wrap the whole lot in a <pre> and don't parse
 707                         $m = array();
 708                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 709                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 710                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 711                         $wgOut->addHTML( "\n</pre>\n" );
 712                 }
 713         }
 714
 715         /**
 716          * Get the robot policy to be used for the current view
 717          * @param $action String the action= GET parameter
 718          * @param $pOutput ParserOutput
 719          * @return Array the policy that should be set
 720          * TODO: actions other than 'view'
 721          */
 722         public function getRobotPolicy( $action, $pOutput ) {
 723                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 724                 global $wgDefaultRobotPolicy, $wgRequest;
 725
 726                 $ns = $this->getTitle()->getNamespace();
 727
 728                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 729                         # Don't index user and user talk pages for blocked users (bug 11443)
 730                         if ( !$this->getTitle()->isSubpage() ) {
 731                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 732                                         return array(
 733                                                 'index'  => 'noindex',
 734                                                 'follow' => 'nofollow'
 735                                         );
 736                                 }
 737                         }
 738                 }
 739
 740                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 741                         # Non-articles (special pages etc), and old revisions
 742                         return array(
 743                                 'index'  => 'noindex',
 744                                 'follow' => 'nofollow'
 745                         );
 746                 } elseif ( $wgOut->isPrintable() ) {
 747                         # Discourage indexing of printable versions, but encourage following
 748                         return array(
 749                                 'index'  => 'noindex',
 750                                 'follow' => 'follow'
 751                         );
 752                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 753                         # For ?curid=x urls, disallow indexing
 754                         return array(
 755                                 'index'  => 'noindex',
 756                                 'follow' => 'follow'
 757                         );
 758                 }
 759
 760                 # Otherwise, construct the policy based on the various config variables.
 761                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 762
 763                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 764                         # Honour customised robot policies for this namespace
 765                         $policy = array_merge(
 766                                 $policy,
 767                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 768                         );
 769                 }
 770                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 771                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 772                         # a final sanity check that we have really got the parser output.
 773                         $policy = array_merge(
 774                                 $policy,
 775                                 array( 'index' => $pOutput->getIndexPolicy() )
 776                         );
 777                 }
 778
 779                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 780                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 781                         $policy = array_merge(
 782                                 $policy,
 783                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 784                         );
 785                 }
 786
 787                 return $policy;
 788         }
 789
 790         /**
 791          * Converts a String robot policy into an associative array, to allow
 792          * merging of several policies using array_merge().
 793          * @param $policy Mixed, returns empty array on null/false/'', transparent
 794          *            to already-converted arrays, converts String.
 795          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 796          */
 797         public static function formatRobotPolicy( $policy ) {
 798                 if ( is_array( $policy ) ) {
 799                         return $policy;
 800                 } elseif ( !$policy ) {
 801                         return array();
 802                 }
 803
 804                 $policy = explode( ',', $policy );
 805                 $policy = array_map( 'trim', $policy );
 806
 807                 $arr = array();
 808                 foreach ( $policy as $var ) {
 809                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 810                                 $arr['index'] = $var;
 811                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 812                                 $arr['follow'] = $var;
 813                         }
 814                 }
 815
 816                 return $arr;
 817         }
 818
 819         /**
 820          * If this request is a redirect view, send "redirected from" subtitle to
 821          * $wgOut. Returns true if the header was needed, false if this is not a
 822          * redirect view. Handles both local and remote redirects.
 823          *
 824          * @return boolean
 825          */
 826         public function showRedirectedFromHeader() {
 827                 global $wgOut, $wgRequest, $wgRedirectSources;
 828
 829                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 830
 831                 if ( isset( $this->mRedirectedFrom ) ) {
 832                         // This is an internally redirected page view.
 833                         // We'll need a backlink to the source page for navigation.
 834                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 835                                 $redir = Linker::linkKnown(
 836                                         $this->mRedirectedFrom,
 837                                         null,
 838                                         array(),
 839                                         array( 'redirect' => 'no' )
 840                                 );
 841
 842                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 843
 844                                 // Set the fragment if one was specified in the redirect
 845                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 846                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 847                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 848                                 }
 849
 850                                 // Add a <link rel="canonical"> tag
 851                                 $wgOut->addLink( array( 'rel' => 'canonical',
 852                                         'href' => $this->getTitle()->getLocalURL() )
 853                                 );
 854
 855                                 // Tell $wgOut the user arrived at this article through a redirect
 856                                 $wgOut->setRedirectedFrom( $this->mRedirectedFrom );
 857
 858                                 return true;
 859                         }
 860                 } elseif ( $rdfrom ) {
 861                         // This is an externally redirected view, from some other wiki.
 862                         // If it was reported from a trusted site, supply a backlink.
 863                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 864                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 865                                 $wgOut->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 866
 867                                 return true;
 868                         }
 869                 }
 870
 871                 return false;
 872         }
 873
 874         /**
 875          * Show a header specific to the namespace currently being viewed, like
 876          * [[MediaWiki:Talkpagetext]]. For Article::view().
 877          */
 878         public function showNamespaceHeader() {
 879                 global $wgOut;
 880
 881                 if ( $this->getTitle()->isTalkPage() ) {
 882                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 883                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 884                         }
 885                 }
 886         }
 887
 888         /**
 889          * Show the footer section of an ordinary page view
 890          */
 891         public function showViewFooter() {
 892                 global $wgOut;
 893
 894                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 895                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 896                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 897                 }
 898
 899                 # If we have been passed an &rcid= parameter, we want to give the user a
 900                 # chance to mark this new article as patrolled.
 901                 $this->showPatrolFooter();
 902
 903                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 904
 905         }
 906
 907         /**
 908          * If patrol is possible, output a patrol UI box. This is called from the
 909          * footer section of ordinary page views. If patrol is not possible or not
 910          * desired, does nothing.
 911          */
 912         public function showPatrolFooter() {
 913                 global $wgOut, $wgRequest, $wgUser;
 914
 915                 $rcid = $wgRequest->getVal( 'rcid' );
 916
 917                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 918                         return;
 919                 }
 920
 921                 $token = $wgUser->getEditToken( $rcid );
 922                 $wgOut->preventClickjacking();
 923
 924                 $wgOut->addHTML(
 925                         "<div class='patrollink'>" .
 926                                 wfMsgHtml(
 927                                         'markaspatrolledlink',
 928                                         Linker::link(
 929                                                 $this->getTitle(),
 930                                                 wfMsgHtml( 'markaspatrolledtext' ),
 931                                                 array(),
 932                                                 array(
 933                                                         'action' => 'markpatrolled',
 934                                                         'rcid' => $rcid,
 935                                                         'token' => $token,
 936                                                 ),
 937                                                 array( 'known', 'noclasses' )
 938                                         )
 939                                 ) .
 940                         '</div>'
 941                 );
 942         }
 943
 944         /**
 945          * Show the error text for a missing article. For articles in the MediaWiki
 946          * namespace, show the default message text. To be called from Article::view().
 947          */
 948         public function showMissingArticle() {
 949                 global $wgOut, $wgRequest, $wgUser, $wgSend404Code;
 950
 951                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 952                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 953                         $parts = explode( '/', $this->getTitle()->getText() );
 954                         $rootPart = $parts[0];
 955                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 956                         $ip = User::isIP( $rootPart );
 957
 958                         if ( !($user && $user->isLoggedIn()) && !$ip ) { # User does not exist
 959                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
 960                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
 961                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 962                                 LogEventsList::showLogExtract(
 963                                         $wgOut,
 964                                         'block',
 965                                         $user->getUserPage()->getPrefixedText(),
 966                                         '',
 967                                         array(
 968                                                 'lim' => 1,
 969                                                 'showIfEmpty' => false,
 970                                                 'msgKey' => array(
 971                                                         'blocked-notice-logextract',
 972                                                         $user->getName() # Support GENDER in notice
 973                                                 )
 974                                         )
 975                                 );
 976                         }
 977                 }
 978
 979                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
 980
 981                 # Show delete and move logs
 982                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
 983                         array(  'lim' => 10,
 984                                 'conds' => array( "log_action != 'revision'" ),
 985                                 'showIfEmpty' => false,
 986                                 'msgKey' => array( 'moveddeleted-notice' ) )
 987                 );
 988
 989                 # Show error message
 990                 $oldid = $this->getOldID();
 991                 if ( $oldid ) {
 992                         $text = wfMsgNoTrans( 'missing-article',
 993                                 $this->getTitle()->getPrefixedText(),
 994                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
 995                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
 996                         // Use the default message text
 997                         $text = $this->getTitle()->getDefaultMessageText();
 998                 } else {
 999                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
1000                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
1001                         $errors = array_merge( $createErrors, $editErrors );
1002
1003                         if ( !count( $errors ) ) {
1004                                 $text = wfMsgNoTrans( 'noarticletext' );
1005                         } else {
1006                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1007                         }
1008                 }
1009                 $text = "<div class='noarticletext'>\n$text\n</div>";
1010
1011                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code ) {
1012                         // If there's no backing content, send a 404 Not Found
1013                         // for better machine handling of broken links.
1014                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
1015                 }
1016
1017                 $wgOut->addWikiText( $text );
1018         }
1019
1020         /**
1021          * If the revision requested for view is deleted, check permissions.
1022          * Send either an error message or a warning header to $wgOut.
1023          *
1024          * @return boolean true if the view is allowed, false if not.
1025          */
1026         public function showDeletedRevisionHeader() {
1027                 global $wgOut, $wgRequest;
1028
1029                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1030                         // Not deleted
1031                         return true;
1032                 }
1033
1034                 // If the user is not allowed to see it...
1035                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1036                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1037                                 'rev-deleted-text-permission' );
1038
1039                         return false;
1040                 // If the user needs to confirm that they want to see it...
1041                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1042                         # Give explanation and add a link to view the revision...
1043                         $oldid = intval( $this->getOldID() );
1044                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
1045                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1046                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1047                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1048                                 array( $msg, $link ) );
1049
1050                         return false;
1051                 // We are allowed to see...
1052                 } else {
1053                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1054                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1055                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1056
1057                         return true;
1058                 }
1059         }
1060
1061         /**
1062          * Generate the navigation links when browsing through an article revisions
1063          * It shows the information as:
1064          *   Revision as of \<date\>; view current revision
1065          *   \<- Previous version | Next Version -\>
1066          *
1067          * @param $oldid String: revision ID of this article revision
1068          */
1069         public function setOldSubtitle( $oldid = 0 ) {
1070                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1071
1072                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1073                         return;
1074                 }
1075
1076                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1077
1078                 # Cascade unhide param in links for easy deletion browsing
1079                 $extraParams = array();
1080                 if ( $wgRequest->getVal( 'unhide' ) ) {
1081                         $extraParams['unhide'] = 1;
1082                 }
1083
1084                 $revision = Revision::newFromId( $oldid );
1085                 $timestamp = $revision->getTimestamp();
1086
1087                 $current = ( $oldid == $this->mPage->getLatest() );
1088                 $td = $wgLang->timeanddate( $timestamp, true );
1089                 $tddate = $wgLang->date( $timestamp, true );
1090                 $tdtime = $wgLang->time( $timestamp, true );
1091
1092                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1093                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1094
1095                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1096                         ? 'revision-info-current'
1097                         : 'revision-info';
1098
1099                 $wgOut->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1100                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1101                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1102
1103                 $lnk = $current
1104                         ? wfMsgHtml( 'currentrevisionlink' )
1105                         : Linker::link(
1106                                 $this->getTitle(),
1107                                 wfMsgHtml( 'currentrevisionlink' ),
1108                                 array(),
1109                                 $extraParams,
1110                                 array( 'known', 'noclasses' )
1111                         );
1112                 $curdiff = $current
1113                         ? wfMsgHtml( 'diff' )
1114                         : Linker::link(
1115                                 $this->getTitle(),
1116                                 wfMsgHtml( 'diff' ),
1117                                 array(),
1118                                 array(
1119                                         'diff' => 'cur',
1120                                         'oldid' => $oldid
1121                                 ) + $extraParams,
1122                                 array( 'known', 'noclasses' )
1123                         );
1124                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1125                 $prevlink = $prev
1126                         ? Linker::link(
1127                                 $this->getTitle(),
1128                                 wfMsgHtml( 'previousrevision' ),
1129                                 array(),
1130                                 array(
1131                                         'direction' => 'prev',
1132                                         'oldid' => $oldid
1133                                 ) + $extraParams,
1134                                 array( 'known', 'noclasses' )
1135                         )
1136                         : wfMsgHtml( 'previousrevision' );
1137                 $prevdiff = $prev
1138                         ? Linker::link(
1139                                 $this->getTitle(),
1140                                 wfMsgHtml( 'diff' ),
1141                                 array(),
1142                                 array(
1143                                         'diff' => 'prev',
1144                                         'oldid' => $oldid
1145                                 ) + $extraParams,
1146                                 array( 'known', 'noclasses' )
1147                         )
1148                         : wfMsgHtml( 'diff' );
1149                 $nextlink = $current
1150                         ? wfMsgHtml( 'nextrevision' )
1151                         : Linker::link(
1152                                 $this->getTitle(),
1153                                 wfMsgHtml( 'nextrevision' ),
1154                                 array(),
1155                                 array(
1156                                         'direction' => 'next',
1157                                         'oldid' => $oldid
1158                                 ) + $extraParams,
1159                                 array( 'known', 'noclasses' )
1160                         );
1161                 $nextdiff = $current
1162                         ? wfMsgHtml( 'diff' )
1163                         : Linker::link(
1164                                 $this->getTitle(),
1165                                 wfMsgHtml( 'diff' ),
1166                                 array(),
1167                                 array(
1168                                         'diff' => 'next',
1169                                         'oldid' => $oldid
1170                                 ) + $extraParams,
1171                                 array( 'known', 'noclasses' )
1172                         );
1173
1174                 $cdel = Linker::getRevDeleteLink( $wgUser, $revision, $this->getTitle() );
1175                 if ( $cdel !== '' ) {
1176                         $cdel .= ' ';
1177                 }
1178
1179                 $wgOut->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1180                         wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1181                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>" );
1182         }
1183
1184         /**
1185          * View redirect
1186          *
1187          * @param $target Title|Array of destination(s) to redirect
1188          * @param $appendSubtitle Boolean [optional]
1189          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1190          * @return string containing HMTL with redirect link
1191          */
1192         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1193                 global $wgOut, $wgStylePath;
1194
1195                 if ( !is_array( $target ) ) {
1196                         $target = array( $target );
1197                 }
1198
1199                 $lang = $this->getTitle()->getPageLanguage();
1200                 $imageDir = $lang->getDir();
1201
1202                 if ( $appendSubtitle ) {
1203                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1204                 }
1205
1206                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1207
1208                 /**
1209                  * @var $title Title
1210                  */
1211                 $title = array_shift( $target );
1212
1213                 if ( $forceKnown ) {
1214                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1215                 } else {
1216                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1217                 }
1218
1219                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1220                 $alt = $lang->isRTL() ? '←' : '→';
1221                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1222                 foreach ( $target as $rt ) {
1223                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1224                         if ( $forceKnown ) {
1225                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1226                         } else {
1227                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1228                         }
1229                 }
1230
1231                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1232                 return '<div class="redirectMsg">' .
1233                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1234                         '<span class="redirectText">' . $link . '</span></div>';
1235         }
1236
1237         /**
1238          * Handle action=render
1239          */
1240         public function render() {
1241                 global $wgOut;
1242
1243                 $wgOut->setArticleBodyOnly( true );
1244                 $this->view();
1245         }
1246
1247         /**
1248          * action=protect handler
1249          */
1250         public function protect() {
1251                 $form = new ProtectionForm( $this );
1252                 $form->execute();
1253         }
1254
1255         /**
1256          * action=unprotect handler (alias)
1257          */
1258         public function unprotect() {
1259                 $this->protect();
1260         }
1261
1262         /**
1263          * UI entry point for page deletion
1264          */
1265         public function delete() {
1266                 global $wgOut, $wgRequest, $wgLang;
1267
1268                 # This code desperately needs to be totally rewritten
1269
1270                 $title = $this->getTitle();
1271                 $user = $this->getContext()->getUser();
1272
1273                 # Check permissions
1274                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1275                 if ( count( $permission_errors ) ) {
1276                         throw new PermissionsError( 'delete', $permission_errors );
1277                 }
1278
1279                 # Read-only check...
1280                 if ( wfReadOnly() ) {
1281                         throw new ReadOnlyError;
1282                 }
1283
1284                 # Better double-check that it hasn't been deleted yet!
1285                 $dbw = wfGetDB( DB_MASTER );
1286                 $conds = $title->pageCond();
1287                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1288                 if ( $latest === false ) {
1289                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1290                         $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1291                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1292                                 );
1293                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1294                         LogEventsList::showLogExtract(
1295                                 $wgOut,
1296                                 'delete',
1297                                 $title->getPrefixedText()
1298                         );
1299
1300                         return;
1301                 }
1302
1303                 $deleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1304                 $deleteReason = $wgRequest->getText( 'wpReason' );
1305
1306                 if ( $deleteReasonList == 'other' ) {
1307                         $reason = $deleteReason;
1308                 } elseif ( $deleteReason != '' ) {
1309                         // Entry from drop down menu + additional comment
1310                         $reason = $deleteReasonList . wfMsgForContent( 'colon-separator' ) . $deleteReason;
1311                 } else {
1312                         $reason = $deleteReasonList;
1313                 }
1314
1315                 if ( $wgRequest->wasPosted() && $user->matchEditToken( $wgRequest->getVal( 'wpEditToken' ),
1316                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1317                 {
1318                         # Flag to hide all contents of the archived revisions
1319                         $suppress = $wgRequest->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1320
1321                         $this->doDelete( $reason, $suppress );
1322
1323                         if ( $wgRequest->getCheck( 'wpWatch' ) && $user->isLoggedIn() ) {
1324                                 $this->doWatch();
1325                         } elseif ( $title->userIsWatching() ) {
1326                                 $this->doUnwatch();
1327                         }
1328
1329                         return;
1330                 }
1331
1332                 // Generate deletion reason
1333                 $hasHistory = false;
1334                 if ( !$reason ) {
1335                         $reason = $this->generateReason( $hasHistory );
1336                 }
1337
1338                 // If the page has a history, insert a warning
1339                 if ( $hasHistory ) {
1340                         $revisions = $this->mTitle->estimateRevisionCount();
1341                         // @todo FIXME: i18n issue/patchwork message
1342                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1343                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1344                                 wfMsgHtml( 'word-separator' ) . Linker::link( $title,
1345                                         wfMsgHtml( 'history' ),
1346                                         array( 'rel' => 'archives' ),
1347                                         array( 'action' => 'history' ) ) .
1348                                 '</strong>'
1349                         );
1350
1351                         if ( $this->mTitle->isBigDeletion() ) {
1352                                 global $wgDeleteRevisionsLimit;
1353                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1354                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1355                         }
1356                 }
1357
1358                 return $this->confirmDelete( $reason );
1359         }
1360
1361         /**
1362          * Output deletion confirmation dialog
1363          * @todo FIXME: Move to another file?
1364          * @param $reason String: prefilled reason
1365          */
1366         public function confirmDelete( $reason ) {
1367                 global $wgOut;
1368
1369                 wfDebug( "Article::confirmDelete\n" );
1370
1371                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1372                 $wgOut->addBacklinkSubtitle( $this->getTitle() );
1373                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1374                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1375
1376                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1377
1378                 $user = $this->getContext()->getUser();
1379
1380                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1381                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1382                                         <td></td>
1383                                         <td class='mw-input'><strong>" .
1384                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1385                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1386                                         "</strong></td>
1387                                 </tr>";
1388                 } else {
1389                         $suppress = '';
1390                 }
1391                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1392
1393                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1394                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1395                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1396                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1397                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1398                         "<tr id=\"wpDeleteReasonListRow\">
1399                                 <td class='mw-label'>" .
1400                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1401                                 "</td>
1402                                 <td class='mw-input'>" .
1403                                         Xml::listDropDown( 'wpDeleteReasonList',
1404                                                 wfMsgForContent( 'deletereason-dropdown' ),
1405                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1406                                 "</td>
1407                         </tr>
1408                         <tr id=\"wpDeleteReasonRow\">
1409                                 <td class='mw-label'>" .
1410                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1411                                 "</td>
1412                                 <td class='mw-input'>" .
1413                                 Html::input( 'wpReason', $reason, 'text', array(
1414                                         'size' => '60',
1415                                         'maxlength' => '255',
1416                                         'tabindex' => '2',
1417                                         'id' => 'wpReason',
1418                                         'autofocus'
1419                                 ) ) .
1420                                 "</td>
1421                         </tr>";
1422
1423                 # Disallow watching if user is not logged in
1424                 if ( $user->isLoggedIn() ) {
1425                         $form .= "
1426                         <tr>
1427                                 <td></td>
1428                                 <td class='mw-input'>" .
1429                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1430                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1431                                 "</td>
1432                         </tr>";
1433                 }
1434
1435                 $form .= "
1436                         $suppress
1437                         <tr>
1438                                 <td></td>
1439                                 <td class='mw-submit'>" .
1440                                         Xml::submitButton( wfMsg( 'deletepage' ),
1441                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1442                                 "</td>
1443                         </tr>" .
1444                         Xml::closeElement( 'table' ) .
1445                         Xml::closeElement( 'fieldset' ) .
1446                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1447                         Xml::closeElement( 'form' );
1448
1449                         if ( $user->isAllowed( 'editinterface' ) ) {
1450                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1451                                 $link = Linker::link(
1452                                         $title,
1453                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1454                                         array(),
1455                                         array( 'action' => 'edit' )
1456                                 );
1457                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1458                         }
1459
1460                 $wgOut->addHTML( $form );
1461                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1462                 LogEventsList::showLogExtract( $wgOut, 'delete',
1463                         $this->getTitle()->getPrefixedText()
1464                 );
1465         }
1466
1467         /**
1468          * Perform a deletion and output success or failure messages
1469          * @param $reason
1470          * @param $suppress bool
1471          */
1472         public function doDelete( $reason, $suppress = false ) {
1473                 global $wgOut;
1474
1475                 $error = '';
1476                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, 0, true, $error ) ) {
1477                         $deleted = $this->getTitle()->getPrefixedText();
1478
1479                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1480                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1481
1482                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1483
1484                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1485                         $wgOut->returnToMain( false );
1486                 } else {
1487                         $wgOut->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1488                         if ( $error == '' ) {
1489                                 $wgOut->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1490                                         array( 'cannotdelete', wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1491                                 );
1492                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1493
1494                                 LogEventsList::showLogExtract(
1495                                         $wgOut,
1496                                         'delete',
1497                                         $this->getTitle()->getPrefixedText()
1498                                 );
1499                         } else {
1500                                 $wgOut->addHTML( $error );
1501                         }
1502                 }
1503         }
1504
1505         /* Caching functions */
1506
1507         /**
1508          * checkLastModified returns true if it has taken care of all
1509          * output to the client that is necessary for this request.
1510          * (that is, it has sent a cached version of the page)
1511          *
1512          * @return boolean true if cached version send, false otherwise
1513          */
1514         protected function tryFileCache() {
1515                 static $called = false;
1516
1517                 if ( $called ) {
1518                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1519                         return false;
1520                 }
1521
1522                 $called = true;
1523                 if ( $this->isFileCacheable() ) {
1524                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1525                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1526                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1527                                 $cache->loadFromFileCache( $this->getContext() );
1528                                 return true;
1529                         } else {
1530                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1531                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1532                         }
1533                 } else {
1534                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1535                 }
1536
1537                 return false;
1538         }
1539
1540         /**
1541          * Check if the page can be cached
1542          * @return bool
1543          */
1544         public function isFileCacheable() {
1545                 $cacheable = false;
1546
1547                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1548                         $cacheable = $this->mPage->getID()
1549                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1550                         // Extension may have reason to disable file caching on some pages.
1551                         if ( $cacheable ) {
1552                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1553                         }
1554                 }
1555
1556                 return $cacheable;
1557         }
1558
1559         /**#@-*/
1560
1561         /**
1562          * Lightweight method to get the parser output for a page, checking the parser cache
1563          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1564          * consider, so it's not appropriate to use there.
1565          *
1566          * @since 1.16 (r52326) for LiquidThreads
1567          *
1568          * @param $oldid mixed integer Revision ID or null
1569          * @param $user User The relevant user
1570          * @return ParserOutput or false if the given revsion ID is not found
1571          */
1572         public function getParserOutput( $oldid = null, User $user = null ) {
1573                 global $wgUser;
1574
1575                 $user = is_null( $user ) ? $wgUser : $user;
1576                 $parserOptions = $this->mPage->makeParserOptions( $user );
1577
1578                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1579         }
1580
1581         /**
1582          * Get parser options suitable for rendering the primary article wikitext
1583          * @return ParserOptions|false
1584          */
1585         public function getParserOptions() {
1586                 global $wgUser;
1587                 if ( !$this->mParserOptions ) {
1588                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1589                 }
1590                 // Clone to allow modifications of the return value without affecting cache
1591                 return clone $this->mParserOptions;
1592         }
1593
1594         /**
1595          * Sets the context this Article is executed in
1596          *
1597          * @param $context IContextSource
1598          * @since 1.18
1599          */
1600         public function setContext( $context ) {
1601                 $this->mContext = $context;
1602         }
1603
1604         /**
1605          * Gets the context this Article is executed in
1606          *
1607          * @return IContextSource
1608          * @since 1.18
1609          */
1610         public function getContext() {
1611                 if ( $this->mContext instanceof IContextSource ) {
1612                         return $this->mContext;
1613                 } else {
1614                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1615                         return RequestContext::getMain();
1616                 }
1617         }
1618
1619         /**
1620          * Info about this page
1621          * @deprecated since 1.19
1622          */
1623         public function info() {
1624                 wfDeprecated( __METHOD__, '1.19' );
1625                 Action::factory( 'info', $this )->show();
1626         }
1627
1628         /**
1629          * Mark this particular edit/page as patrolled
1630          * @deprecated since 1.18
1631          */
1632         public function markpatrolled() {
1633                 wfDeprecated( __METHOD__, '1.18' );
1634                 Action::factory( 'markpatrolled', $this )->show();
1635         }
1636
1637         /**
1638          * Handle action=purge
1639          * @deprecated since 1.19
1640          */
1641         public function purge() {
1642                 return Action::factory( 'purge', $this )->show();
1643         }
1644
1645         /**
1646          * Handle action=revert
1647          * @deprecated since 1.19
1648          */
1649         public function revert() {
1650                 wfDeprecated( __METHOD__, '1.19' );
1651                 Action::factory( 'revert', $this )->show();
1652         }
1653
1654         /**
1655          * Handle action=rollback
1656          * @deprecated since 1.19
1657          */
1658         public function rollback() {
1659                 wfDeprecated( __METHOD__, '1.19' );
1660                 Action::factory( 'rollback', $this )->show();
1661         }
1662
1663         /**
1664          * User-interface handler for the "watch" action.
1665          * Requires Request to pass a token as of 1.18.
1666          * @deprecated since 1.18
1667          */
1668         public function watch() {
1669                 wfDeprecated( __METHOD__, '1.18' );
1670                 Action::factory( 'watch', $this )->show();
1671         }
1672
1673         /**
1674          * Add this page to $wgUser's watchlist
1675          *
1676          * This is safe to be called multiple times
1677          *
1678          * @return bool true on successful watch operation
1679          * @deprecated since 1.18
1680          */
1681         public function doWatch() {
1682                 global $wgUser;
1683                 wfDeprecated( __METHOD__, '1.18' );
1684                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1685         }
1686
1687         /**
1688          * User interface handler for the "unwatch" action.
1689          * Requires Request to pass a token as of 1.18.
1690          * @deprecated since 1.18
1691          */
1692         public function unwatch() {
1693                 wfDeprecated( __METHOD__, '1.18' );
1694                 Action::factory( 'unwatch', $this )->show();
1695         }
1696
1697         /**
1698          * Stop watching a page
1699          * @return bool true on successful unwatch
1700          * @deprecated since 1.18
1701          */
1702         public function doUnwatch() {
1703                 global $wgUser;
1704                 wfDeprecated( __METHOD__, '1.18' );
1705                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1706         }
1707
1708         /**
1709          * Output a redirect back to the article.
1710          * This is typically used after an edit.
1711          *
1712          * @deprecated in 1.18; call $wgOut->redirect() directly
1713          * @param $noRedir Boolean: add redirect=no
1714          * @param $sectionAnchor String: section to redirect to, including "#"
1715          * @param $extraQuery String: extra query params
1716          */
1717         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1718                 wfDeprecated( __METHOD__, '1.18' );
1719                 global $wgOut;
1720
1721                 if ( $noRedir ) {
1722                         $query = 'redirect=no';
1723                         if ( $extraQuery )
1724                                 $query .= "&$extraQuery";
1725                 } else {
1726                         $query = $extraQuery;
1727                 }
1728
1729                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1730         }
1731
1732         /**
1733          * Use PHP's magic __get handler to handle accessing of
1734          * raw WikiPage fields for backwards compatibility.
1735          *
1736          * @param $fname String Field name
1737          */
1738         public function __get( $fname ) {
1739                 if ( property_exists( $this->mPage, $fname ) ) {
1740                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1741                         return $this->mPage->$fname;
1742                 }
1743                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1744         }
1745
1746         /**
1747          * Use PHP's magic __set handler to handle setting of
1748          * raw WikiPage fields for backwards compatibility.
1749          *
1750          * @param $fname String Field name
1751          * @param $fvalue mixed New value
1752          */
1753         public function __set( $fname, $fvalue ) {
1754                 if ( property_exists( $this->mPage, $fname ) ) {
1755                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1756                         $this->mPage->$fname = $fvalue;
1757                 // Note: extensions may want to toss on new fields
1758                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1759                         $this->mPage->$fname = $fvalue;
1760                 } else {
1761                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1762                 }
1763         }
1764
1765         /**
1766          * Use PHP's magic __call handler to transform instance calls to
1767          * WikiPage functions for backwards compatibility.
1768          *
1769          * @param $fname String Name of called method
1770          * @param $args Array Arguments to the method
1771          */
1772         public function __call( $fname, $args ) {
1773                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1774                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1775                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1776                 }
1777                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1778         }
1779
1780         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1781
1782         /**
1783          * @param $limit array
1784          * @param $expiry array
1785          * @param $cascade bool
1786          * @param $reason string
1787          * @param $user User
1788          * @return Status
1789          */
1790         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1791                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1792         }
1793
1794         /**
1795          * @param $limit array
1796          * @param $reason string
1797          * @param $cascade int
1798          * @param $expiry array
1799          * @return bool
1800          */
1801         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1802                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1803         }
1804
1805         /**
1806          * @param $reason string
1807          * @param $suppress bool
1808          * @param $id int
1809          * @param $commit bool
1810          * @param $error string
1811          * @return bool
1812          */
1813         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1814                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1815         }
1816
1817         /**
1818          * @param $fromP
1819          * @param $summary
1820          * @param $token
1821          * @param $bot
1822          * @param $resultDetails
1823          * @param $user User
1824          * @return array
1825          */
1826         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1827                 global $wgUser;
1828                 $user = is_null( $user ) ? $wgUser : $user;
1829                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1830         }
1831
1832         /**
1833          * @param $fromP
1834          * @param $summary
1835          * @param $bot
1836          * @param $resultDetails
1837          * @param $guser User
1838          * @return array
1839          */
1840         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1841                 global $wgUser;
1842                 $guser = is_null( $guser ) ? $wgUser : $guser;
1843                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1844         }
1845
1846         /**
1847          * @param $hasHistory bool
1848          * @return mixed
1849          */
1850         public function generateReason( &$hasHistory ) {
1851                 return $this->mPage->getAutoDeleteReason( $hasHistory );
1852         }
1853
1854         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1855
1856         /**
1857          * @return array
1858          */
1859         public static function selectFields() {
1860                 return WikiPage::selectFields();
1861         }
1862
1863         /**
1864          * @param $title Title
1865          */
1866         public static function onArticleCreate( $title ) {
1867                 WikiPage::onArticleCreate( $title );
1868         }
1869
1870         /**
1871          * @param $title Title
1872          */
1873         public static function onArticleDelete( $title ) {
1874                 WikiPage::onArticleDelete( $title );
1875         }
1876
1877         /**
1878          * @param $title Title
1879          */
1880         public static function onArticleEdit( $title ) {
1881                 WikiPage::onArticleEdit( $title );
1882         }
1883
1884         /**
1885          * @param $oldtext
1886          * @param $newtext
1887          * @param $flags
1888          * @return string
1889          */
1890         public static function getAutosummary( $oldtext, $newtext, $flags ) {
1891                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
1892         }
1893         // ******
1894 }