includes/Article.php

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