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          * @protected
  37          * @var ParserOptions: ParserOptions object for $wgUser articles
  38          */
  39         public $mParserOptions;
  40
  41         var $mContent;                    // !<
  42         var $mContentLoaded = false;      // !<
  43         var $mOldId;                      // !<
  44
  45         /**
  46          * @var Title
  47          */
  48         var $mRedirectedFrom = null;
  49
  50         /**
  51          * @var mixed: boolean false or URL string
  52          */
  53         var $mRedirectUrl = false;        // !<
  54         var $mRevIdFetched = 0;           // !<
  55
  56         /**
  57          * @var Revision
  58          */
  59         var $mRevision = null;
  60
  61         /**
  62          * @var ParserOutput
  63          */
  64         var $mParserOutput;
  65
  66         /**@}}*/
  67
  68         /**
  69          * Constructor and clear the article
  70          * @param $title Title Reference to a Title object.
  71          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  72          */
  73         public function __construct( Title $title, $oldId = null ) {
  74                 $this->mOldId = $oldId;
  75                 $this->mPage = $this->newPage( $title );
  76         }
  77
  78         protected function newPage( Title $title ) {
  79                 return new WikiPage( $title );
  80         }
  81
  82         /**
  83          * Constructor from a page id
  84          * @param $id Int article ID to load
  85          */
  86         public static function newFromID( $id ) {
  87                 $t = Title::newFromID( $id );
  88                 # @todo FIXME: Doesn't inherit right
  89                 return $t == null ? null : new self( $t );
  90                 # return $t == null ? null : new static( $t ); // PHP 5.3
  91         }
  92
  93         /**
  94          * Create an Article object of the appropriate class for the given page.
  95          *
  96          * @param $title Title
  97          * @param $context IContextSource
  98          * @return Article object
  99          */
 100         public static function newFromTitle( $title, IContextSource $context ) {
 101                 if ( NS_MEDIA == $title->getNamespace() ) {
 102                         // FIXME: where should this go?
 103                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 104                 }
 105
 106                 $page = null;
 107                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 108                 if ( !$page ) {
 109                         switch( $title->getNamespace() ) {
 110                                 case NS_FILE:
 111                                         $page = new ImagePage( $title );
 112                                         break;
 113                                 case NS_CATEGORY:
 114                                         $page = new CategoryPage( $title );
 115                                         break;
 116                                 default:
 117                                         $page = new Article( $title );
 118                         }
 119                 }
 120                 $page->setContext( $context );
 121
 122                 return $page;
 123         }
 124
 125         /**
 126          * Tell the page view functions that this view was redirected
 127          * from another page on the wiki.
 128          * @param $from Title object.
 129          */
 130         public function setRedirectedFrom( Title $from ) {
 131                 $this->mRedirectedFrom = $from;
 132         }
 133
 134         /**
 135          * Get the title object of the article
 136          * @return Title object of this page
 137          */
 138         public function getTitle() {
 139                 return $this->mPage->getTitle();
 140         }
 141
 142         /**
 143          * Clear the object
 144          * @todo FIXME: Shouldn't this be public?
 145          * @private
 146          */
 147         public function clear() {
 148                 $this->mContentLoaded = false;
 149
 150                 $this->mRedirectedFrom = null; # Title object if set
 151                 $this->mRevIdFetched = 0;
 152                 $this->mRedirectUrl = false;
 153
 154                 $this->mPage->clear();
 155         }
 156
 157         /**
 158          * Note that getContent/loadContent do not follow redirects anymore.
 159          * If you need to fetch redirectable content easily, try
 160          * the shortcut in Article::followRedirect()
 161          *
 162          * This function has side effects! Do not use this function if you
 163          * only want the real revision text if any.
 164          *
 165          * @return Return the text of this revision
 166          */
 167         public function getContent() {
 168                 global $wgUser;
 169
 170                 wfProfileIn( __METHOD__ );
 171
 172                 if ( $this->mPage->getID() === 0 ) {
 173                         # If this is a MediaWiki:x message, then load the messages
 174                         # and return the message value for x.
 175                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 176                                 $text = $this->getTitle()->getDefaultMessageText();
 177                                 if ( $text === false ) {
 178                                         $text = '';
 179                                 }
 180                         } else {
 181                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 182                         }
 183                         wfProfileOut( __METHOD__ );
 184
 185                         return $text;
 186                 } else {
 187                         $this->loadContent();
 188                         wfProfileOut( __METHOD__ );
 189
 190                         return $this->mContent;
 191                 }
 192         }
 193
 194         /**
 195          * @return int The oldid of the article that is to be shown, 0 for the
 196          *             current revision
 197          */
 198         public function getOldID() {
 199                 if ( is_null( $this->mOldId ) ) {
 200                         $this->mOldId = $this->getOldIDFromRequest();
 201                 }
 202
 203                 return $this->mOldId;
 204         }
 205
 206         /**
 207          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 208          *
 209          * @return int The old id for the request
 210          */
 211         public function getOldIDFromRequest() {
 212                 global $wgRequest;
 213
 214                 $this->mRedirectUrl = false;
 215
 216                 $oldid = $wgRequest->getVal( 'oldid' );
 217
 218                 if ( isset( $oldid ) ) {
 219                         $oldid = intval( $oldid );
 220                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 221                                 $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 222                                 if ( $nextid ) {
 223                                         $oldid = $nextid;
 224                                 } else {
 225                                         $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 226                                 }
 227                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 228                                 $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 229                                 if ( $previd ) {
 230                                         $oldid = $previd;
 231                                 }
 232                         }
 233                 }
 234
 235                 if ( !$oldid ) {
 236                         $oldid = 0;
 237                 }
 238
 239                 return $oldid;
 240         }
 241
 242         /**
 243          * Load the revision (including text) into this object
 244          */
 245         function loadContent() {
 246                 if ( $this->mContentLoaded ) {
 247                         return;
 248                 }
 249
 250                 wfProfileIn( __METHOD__ );
 251
 252                 $this->fetchContent( $this->getOldID() );
 253
 254                 wfProfileOut( __METHOD__ );
 255         }
 256
 257         /**
 258          * Get text of an article from database
 259          * Does *NOT* follow redirects.
 260          *
 261          * @param $oldid Int: 0 for whatever the latest revision is
 262          * @return mixed string containing article contents, or false if null
 263          */
 264         function fetchContent( $oldid = 0 ) {
 265                 if ( $this->mContentLoaded ) {
 266                         return $this->mContent;
 267                 }
 268
 269                 # Pre-fill content with error message so that if something
 270                 # fails we'll have something telling us what we intended.
 271                 $t = $this->getTitle()->getPrefixedText();
 272                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 273                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 274
 275                 if ( $oldid ) {
 276                         $revision = Revision::newFromId( $oldid );
 277                         if ( !$revision ) {
 278                                 wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 279                                 return false;
 280                         }
 281                         // Revision title doesn't match the page title given?
 282                         if ( $this->mPage->getID() != $revision->getPage() ) {
 283                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 284                                 $this->mPage = call_user_func( $function, $revision->getPage() );
 285                                 if ( !$this->mPage->getId() ) {
 286                                         wfDebug( __METHOD__ . " failed to get page data linked to revision id $oldid\n" );
 287                                         return false;
 288                                 }
 289                         }
 290                 } else {
 291                         if ( !$this->mPage->getLatest() ) {
 292                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 293                                 return false;
 294                         }
 295
 296                         $revision = $this->mPage->getRevision();
 297                         if ( !$revision ) {
 298                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 299                                 return false;
 300                         }
 301                 }
 302
 303                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 304                 // We should instead work with the Revision object when we need it...
 305                 $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 306
 307                 $this->mRevIdFetched = $revision->getId();
 308                 $this->mContentLoaded = true;
 309                 $this->mRevision =& $revision;
 310
 311                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 312
 313                 return $this->mContent;
 314         }
 315
 316         /**
 317          * No-op
 318          * @deprecated since 1.18
 319          */
 320         public function forUpdate() {
 321                 wfDeprecated( __METHOD__ );
 322         }
 323
 324         /**
 325          * Returns true if the currently-referenced revision is the current edit
 326          * to this page (and it exists).
 327          * @return bool
 328          */
 329         public function isCurrent() {
 330                 # If no oldid, this is the current version.
 331                 if ( $this->getOldID() == 0 ) {
 332                         return true;
 333                 }
 334
 335                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 336         }
 337
 338         /**
 339          * Use this to fetch the rev ID used on page views
 340          *
 341          * @return int revision ID of last article revision
 342          */
 343         public function getRevIdFetched() {
 344                 if ( $this->mRevIdFetched ) {
 345                         return $this->mRevIdFetched;
 346                 } else {
 347                         return $this->mPage->getLatest();
 348                 }
 349         }
 350
 351         /**
 352          * This is the default action of the index.php entry point: just view the
 353          * page of the given title.
 354          */
 355         public function view() {
 356                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 357                 global $wgUseFileCache, $wgUseETag;
 358
 359                 wfProfileIn( __METHOD__ );
 360
 361                 # Get variables from query string
 362                 $oldid = $this->getOldID();
 363
 364                 # getOldID may want us to redirect somewhere else
 365                 if ( $this->mRedirectUrl ) {
 366                         $wgOut->redirect( $this->mRedirectUrl );
 367                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 368                         wfProfileOut( __METHOD__ );
 369
 370                         return;
 371                 }
 372
 373                 # Set page title (may be overridden by DISPLAYTITLE)
 374                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 375
 376                 # If we got diff in the query, we want to see a diff page instead of the article.
 377                 if ( $wgRequest->getCheck( 'diff' ) ) {
 378                         wfDebug( __METHOD__ . ": showing diff page\n" );
 379                         $this->showDiffPage();
 380                         wfProfileOut( __METHOD__ );
 381
 382                         return;
 383                 }
 384
 385                 $wgOut->setArticleFlag( true );
 386                 # Allow frames by default
 387                 $wgOut->allowClickjacking();
 388
 389                 $parserCache = ParserCache::singleton();
 390
 391                 $parserOptions = $this->getParserOptions();
 392                 # Render printable version, use printable version cache
 393                 if ( $wgOut->isPrintable() ) {
 394                         $parserOptions->setIsPrintable( true );
 395                         $parserOptions->setEditSection( false );
 396                 } elseif ( $wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 397                         $parserOptions->setEditSection( false );
 398                 }
 399
 400                 # Try client and file cache
 401                 if ( $oldid === 0 && $this->mPage->checkTouched() ) {
 402                         if ( $wgUseETag ) {
 403                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 404                         }
 405
 406                         # Is it client cached?
 407                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 408                                 wfDebug( __METHOD__ . ": done 304\n" );
 409                                 wfProfileOut( __METHOD__ );
 410
 411                                 return;
 412                         # Try file cache
 413                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 414                                 wfDebug( __METHOD__ . ": done file cache\n" );
 415                                 # tell wgOut that output is taken care of
 416                                 $wgOut->disable();
 417                                 $this->mPage->viewUpdates();
 418                                 wfProfileOut( __METHOD__ );
 419
 420                                 return;
 421                         }
 422                 }
 423
 424                 if ( !$wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 425                         $parserOptions->setEditSection( false );
 426                 }
 427
 428                 # Should the parser cache be used?
 429                 $useParserCache = $this->useParserCache( $oldid );
 430                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 431                 if ( $wgUser->getStubThreshold() ) {
 432                         wfIncrStats( 'pcache_miss_stub' );
 433                 }
 434
 435                 $wasRedirected = $this->showRedirectedFromHeader();
 436                 $this->showNamespaceHeader();
 437
 438                 # Iterate through the possible ways of constructing the output text.
 439                 # Keep going until $outputDone is set, or we run out of things to do.
 440                 $pass = 0;
 441                 $outputDone = false;
 442                 $this->mParserOutput = false;
 443
 444                 while ( !$outputDone && ++$pass ) {
 445                         switch( $pass ) {
 446                                 case 1:
 447                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 448                                         break;
 449                                 case 2:
 450                                         # Try the parser cache
 451                                         if ( $useParserCache ) {
 452                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 453
 454                                                 if ( $this->mParserOutput !== false ) {
 455                                                         wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 456                                                         $wgOut->addParserOutput( $this->mParserOutput );
 457                                                         # Ensure that UI elements requiring revision ID have
 458                                                         # the correct version information.
 459                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 460                                                         $outputDone = true;
 461                                                         # Preload timestamp to avoid a DB hit
 462                                                         if ( isset( $this->mParserOutput->mTimestamp ) ) {
 463                                                                 $this->mPage->setTimestamp( $this->mParserOutput->mTimestamp );
 464                                                         }
 465                                                 }
 466                                         }
 467                                         break;
 468                                 case 3:
 469                                         $text = $this->getContent();
 470                                         if ( $text === false || $this->mPage->getID() == 0 ) {
 471                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 472                                                 $this->showMissingArticle();
 473                                                 wfProfileOut( __METHOD__ );
 474                                                 return;
 475                                         }
 476
 477                                         # Another whitelist check in case oldid is altering the title
 478                                         if ( !$this->getTitle()->userCanRead() ) {
 479                                                 wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 480                                                 $wgOut->loginToUse();
 481                                                 $wgOut->output();
 482                                                 $wgOut->disable();
 483                                                 wfProfileOut( __METHOD__ );
 484                                                 return;
 485                                         }
 486
 487                                         # Are we looking at an old revision
 488                                         if ( $oldid && !is_null( $this->mRevision ) ) {
 489                                                 $this->setOldSubtitle( $oldid );
 490
 491                                                 if ( !$this->showDeletedRevisionHeader() ) {
 492                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 493                                                         wfProfileOut( __METHOD__ );
 494                                                         return;
 495                                                 }
 496
 497                                                 # If this "old" version is the current, then try the parser cache...
 498                                                 if ( $oldid === $this->mPage->getLatest() && $this->useParserCache( false ) ) {
 499                                                         $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 500                                                         if ( $this->mParserOutput ) {
 501                                                                 wfDebug( __METHOD__ . ": showing parser cache for current rev permalink\n" );
 502                                                                 $wgOut->addParserOutput( $this->mParserOutput );
 503                                                                 $wgOut->setRevisionId( $this->mPage->getLatest() );
 504                                                                 $outputDone = true;
 505                                                                 break;
 506                                                         }
 507                                                 }
 508                                         }
 509
 510                                         # Ensure that UI elements requiring revision ID have
 511                                         # the correct version information.
 512                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 513
 514                                         # Pages containing custom CSS or JavaScript get special treatment
 515                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 516                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 517                                                 $this->showCssOrJsPage();
 518                                                 $outputDone = true;
 519                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 520                                                 # Allow extensions do their own custom view for certain pages
 521                                                 $outputDone = true;
 522                                         } else {
 523                                                 $rt = Title::newFromRedirectArray( $text );
 524                                                 if ( $rt ) {
 525                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 526                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 527                                                         # Don't append the subtitle if this was an old revision
 528                                                         $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
 529                                                         # Parse just to get categories, displaytitle, etc.
 530                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 531                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 532                                                         $outputDone = true;
 533                                                 }
 534                                         }
 535                                         break;
 536                                 case 4:
 537                                         # Run the parse, protected by a pool counter
 538                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 539
 540                                         $key = $parserCache->getKey( $this, $parserOptions );
 541                                         $poolArticleView = new PoolWorkArticleView( $this, $key, $useParserCache, $parserOptions );
 542
 543                                         if ( !$poolArticleView->execute() ) {
 544                                                 # Connection or timeout error
 545                                                 wfProfileOut( __METHOD__ );
 546                                                 return;
 547                                         } else {
 548                                                 $outputDone = true;
 549                                         }
 550                                         break;
 551                                 # Should be unreachable, but just in case...
 552                                 default:
 553                                         break 2;
 554                         }
 555                 }
 556
 557                 # Get the ParserOutput actually *displayed* here.
 558                 # Note that $this->mParserOutput is the *current* version output.
 559                 $pOutput = ( $outputDone instanceof ParserOutput )
 560                         ? $outputDone // object fetched by hook
 561                         : $this->mParserOutput;
 562
 563                 # Adjust title for main page & pages with displaytitle
 564                 if ( $pOutput ) {
 565                         $this->adjustDisplayTitle( $pOutput );
 566                 }
 567
 568                 # For the main page, overwrite the <title> element with the con-
 569                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 570                 # that's not empty).
 571                 # This message always exists because it is in the i18n files
 572                 if ( $this->getTitle()->isMainPage() ) {
 573                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 574                         if ( !$msg->isDisabled() ) {
 575                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 576                         }
 577                 }
 578
 579                 # Check for any __NOINDEX__ tags on the page using $pOutput
 580                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 581                 $wgOut->setIndexPolicy( $policy['index'] );
 582                 $wgOut->setFollowPolicy( $policy['follow'] );
 583
 584                 $this->showViewFooter();
 585                 $this->mPage->viewUpdates();
 586
 587                 wfProfileOut( __METHOD__ );
 588         }
 589
 590         /*
 591          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 592          * @param $pOutput ParserOutput
 593          */
 594         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 595                 global $wgOut;
 596                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 597                 $titleText = $pOutput->getTitleText();
 598                 if ( strval( $titleText ) !== '' ) {
 599                         $wgOut->setPageTitle( $titleText );
 600                 }
 601         }
 602
 603         /**
 604          * Show a diff page according to current request variables. For use within
 605          * Article::view() only, other callers should use the DifferenceEngine class.
 606          */
 607         public function showDiffPage() {
 608                 global $wgRequest, $wgUser;
 609
 610                 $diff = $wgRequest->getVal( 'diff' );
 611                 $rcid = $wgRequest->getVal( 'rcid' );
 612                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 613                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 614                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 615                 $oldid = $this->getOldID();
 616
 617                 $de = new DifferenceEngine( $this->getTitle(), $oldid, $diff, $rcid, $purge, $unhide );
 618                 // DifferenceEngine directly fetched the revision:
 619                 $this->mRevIdFetched = $de->mNewid;
 620                 $de->showDiffPage( $diffOnly );
 621
 622                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 623                         # Run view updates for current revision only
 624                         $this->mPage->viewUpdates();
 625                 }
 626         }
 627
 628         /**
 629          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 630          * Article::view() only.
 631          *
 632          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 633          * page views.
 634          */
 635         protected function showCssOrJsPage() {
 636                 global $wgOut;
 637
 638                 $dir = $this->getContext()->getLang()->getDir();
 639                 $lang = $this->getContext()->getLang()->getCode();
 640
 641                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 642                         'clearyourcache' );
 643
 644                 // Give hooks a chance to customise the output
 645                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 646                         // Wrap the whole lot in a <pre> and don't parse
 647                         $m = array();
 648                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 649                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 650                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 651                         $wgOut->addHTML( "\n</pre>\n" );
 652                 }
 653         }
 654
 655         /**
 656          * Get the robot policy to be used for the current view
 657          * @param $action String the action= GET parameter
 658          * @param $pOutput ParserOutput
 659          * @return Array the policy that should be set
 660          * TODO: actions other than 'view'
 661          */
 662         public function getRobotPolicy( $action, $pOutput ) {
 663                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 664                 global $wgDefaultRobotPolicy, $wgRequest;
 665
 666                 $ns = $this->getTitle()->getNamespace();
 667
 668                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 669                         # Don't index user and user talk pages for blocked users (bug 11443)
 670                         if ( !$this->getTitle()->isSubpage() ) {
 671                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 672                                         return array(
 673                                                 'index'  => 'noindex',
 674                                                 'follow' => 'nofollow'
 675                                         );
 676                                 }
 677                         }
 678                 }
 679
 680                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 681                         # Non-articles (special pages etc), and old revisions
 682                         return array(
 683                                 'index'  => 'noindex',
 684                                 'follow' => 'nofollow'
 685                         );
 686                 } elseif ( $wgOut->isPrintable() ) {
 687                         # Discourage indexing of printable versions, but encourage following
 688                         return array(
 689                                 'index'  => 'noindex',
 690                                 'follow' => 'follow'
 691                         );
 692                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 693                         # For ?curid=x urls, disallow indexing
 694                         return array(
 695                                 'index'  => 'noindex',
 696                                 'follow' => 'follow'
 697                         );
 698                 }
 699
 700                 # Otherwise, construct the policy based on the various config variables.
 701                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 702
 703                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 704                         # Honour customised robot policies for this namespace
 705                         $policy = array_merge(
 706                                 $policy,
 707                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 708                         );
 709                 }
 710                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 711                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 712                         # a final sanity check that we have really got the parser output.
 713                         $policy = array_merge(
 714                                 $policy,
 715                                 array( 'index' => $pOutput->getIndexPolicy() )
 716                         );
 717                 }
 718
 719                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 720                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 721                         $policy = array_merge(
 722                                 $policy,
 723                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 724                         );
 725                 }
 726
 727                 return $policy;
 728         }
 729
 730         /**
 731          * Converts a String robot policy into an associative array, to allow
 732          * merging of several policies using array_merge().
 733          * @param $policy Mixed, returns empty array on null/false/'', transparent
 734          *            to already-converted arrays, converts String.
 735          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 736          */
 737         public static function formatRobotPolicy( $policy ) {
 738                 if ( is_array( $policy ) ) {
 739                         return $policy;
 740                 } elseif ( !$policy ) {
 741                         return array();
 742                 }
 743
 744                 $policy = explode( ',', $policy );
 745                 $policy = array_map( 'trim', $policy );
 746
 747                 $arr = array();
 748                 foreach ( $policy as $var ) {
 749                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 750                                 $arr['index'] = $var;
 751                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 752                                 $arr['follow'] = $var;
 753                         }
 754                 }
 755
 756                 return $arr;
 757         }
 758
 759         /**
 760          * If this request is a redirect view, send "redirected from" subtitle to
 761          * $wgOut. Returns true if the header was needed, false if this is not a
 762          * redirect view. Handles both local and remote redirects.
 763          *
 764          * @return boolean
 765          */
 766         public function showRedirectedFromHeader() {
 767                 global $wgOut, $wgRequest, $wgRedirectSources;
 768
 769                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 770
 771                 if ( isset( $this->mRedirectedFrom ) ) {
 772                         // This is an internally redirected page view.
 773                         // We'll need a backlink to the source page for navigation.
 774                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 775                                 $redir = Linker::link(
 776                                         $this->mRedirectedFrom,
 777                                         null,
 778                                         array(),
 779                                         array( 'redirect' => 'no' ),
 780                                         array( 'known', 'noclasses' )
 781                                 );
 782
 783                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 784                                 $wgOut->setSubtitle( $s );
 785
 786                                 // Set the fragment if one was specified in the redirect
 787                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 788                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 789                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 790                                 }
 791
 792                                 // Add a <link rel="canonical"> tag
 793                                 $wgOut->addLink( array( 'rel' => 'canonical',
 794                                         'href' => $this->getTitle()->getLocalURL() )
 795                                 );
 796
 797                                 return true;
 798                         }
 799                 } elseif ( $rdfrom ) {
 800                         // This is an externally redirected view, from some other wiki.
 801                         // If it was reported from a trusted site, supply a backlink.
 802                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 803                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 804                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 805                                 $wgOut->setSubtitle( $s );
 806
 807                                 return true;
 808                         }
 809                 }
 810
 811                 return false;
 812         }
 813
 814         /**
 815          * Show a header specific to the namespace currently being viewed, like
 816          * [[MediaWiki:Talkpagetext]]. For Article::view().
 817          */
 818         public function showNamespaceHeader() {
 819                 global $wgOut;
 820
 821                 if ( $this->getTitle()->isTalkPage() ) {
 822                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 823                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 824                         }
 825                 }
 826         }
 827
 828         /**
 829          * Show the footer section of an ordinary page view
 830          */
 831         public function showViewFooter() {
 832                 global $wgOut, $wgUseTrackbacks;
 833
 834                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 835                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 836                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 837                 }
 838
 839                 # If we have been passed an &rcid= parameter, we want to give the user a
 840                 # chance to mark this new article as patrolled.
 841                 $this->showPatrolFooter();
 842
 843                 # Trackbacks
 844                 if ( $wgUseTrackbacks ) {
 845                         $this->addTrackbacks();
 846                 }
 847
 848                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 849
 850         }
 851
 852         /**
 853          * If patrol is possible, output a patrol UI box. This is called from the
 854          * footer section of ordinary page views. If patrol is not possible or not
 855          * desired, does nothing.
 856          */
 857         public function showPatrolFooter() {
 858                 global $wgOut, $wgRequest, $wgUser;
 859
 860                 $rcid = $wgRequest->getVal( 'rcid' );
 861
 862                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 863                         return;
 864                 }
 865
 866                 $token = $wgUser->editToken( $rcid );
 867                 $wgOut->preventClickjacking();
 868
 869                 $wgOut->addHTML(
 870                         "<div class='patrollink'>" .
 871                                 wfMsgHtml(
 872                                         'markaspatrolledlink',
 873                                         Linker::link(
 874                                                 $this->getTitle(),
 875                                                 wfMsgHtml( 'markaspatrolledtext' ),
 876                                                 array(),
 877                                                 array(
 878                                                         'action' => 'markpatrolled',
 879                                                         'rcid' => $rcid,
 880                                                         'token' => $token,
 881                                                 ),
 882                                                 array( 'known', 'noclasses' )
 883                                         )
 884                                 ) .
 885                         '</div>'
 886                 );
 887         }
 888
 889         /**
 890          * Show the error text for a missing article. For articles in the MediaWiki
 891          * namespace, show the default message text. To be called from Article::view().
 892          */
 893         public function showMissingArticle() {
 894                 global $wgOut, $wgRequest, $wgUser;
 895
 896                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 897                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 898                         $parts = explode( '/', $this->getTitle()->getText() );
 899                         $rootPart = $parts[0];
 900                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 901                         $ip = User::isIP( $rootPart );
 902
 903                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 904                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
 905                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
 906                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 907                                 LogEventsList::showLogExtract(
 908                                         $wgOut,
 909                                         'block',
 910                                         $user->getUserPage()->getPrefixedText(),
 911                                         '',
 912                                         array(
 913                                                 'lim' => 1,
 914                                                 'showIfEmpty' => false,
 915                                                 'msgKey' => array(
 916                                                         'blocked-notice-logextract',
 917                                                         $user->getName() # Support GENDER in notice
 918                                                 )
 919                                         )
 920                                 );
 921                         }
 922                 }
 923
 924                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
 925
 926                 # Show delete and move logs
 927                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
 928                         array(  'lim' => 10,
 929                                 'conds' => array( "log_action != 'revision'" ),
 930                                 'showIfEmpty' => false,
 931                                 'msgKey' => array( 'moveddeleted-notice' ) )
 932                 );
 933
 934                 # Show error message
 935                 $oldid = $this->getOldID();
 936                 if ( $oldid ) {
 937                         $text = wfMsgNoTrans( 'missing-article',
 938                                 $this->getTitle()->getPrefixedText(),
 939                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
 940                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
 941                         // Use the default message text
 942                         $text = $this->getTitle()->getDefaultMessageText();
 943                 } else {
 944                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
 945                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
 946                         $errors = array_merge( $createErrors, $editErrors );
 947
 948                         if ( !count( $errors ) ) {
 949                                 $text = wfMsgNoTrans( 'noarticletext' );
 950                         } else {
 951                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
 952                         }
 953                 }
 954                 $text = "<div class='noarticletext'>\n$text\n</div>";
 955
 956                 if ( !$this->mPage->hasViewableContent() ) {
 957                         // If there's no backing content, send a 404 Not Found
 958                         // for better machine handling of broken links.
 959                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
 960                 }
 961
 962                 $wgOut->addWikiText( $text );
 963         }
 964
 965         /**
 966          * If the revision requested for view is deleted, check permissions.
 967          * Send either an error message or a warning header to $wgOut.
 968          *
 969          * @return boolean true if the view is allowed, false if not.
 970          */
 971         public function showDeletedRevisionHeader() {
 972                 global $wgOut, $wgRequest;
 973
 974                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 975                         // Not deleted
 976                         return true;
 977                 }
 978
 979                 // If the user is not allowed to see it...
 980                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 981                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 982                                 'rev-deleted-text-permission' );
 983
 984                         return false;
 985                 // If the user needs to confirm that they want to see it...
 986                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
 987                         # Give explanation and add a link to view the revision...
 988                         $oldid = intval( $this->getOldID() );
 989                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
 990                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
 991                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
 992                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 993                                 array( $msg, $link ) );
 994
 995                         return false;
 996                 // We are allowed to see...
 997                 } else {
 998                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
 999                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1000                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1001
1002                         return true;
1003                 }
1004         }
1005
1006         /**
1007          * Execute the uncached parse for action=view
1008          */
1009         public function doViewParse() {
1010                 global $wgOut;
1011
1012                 $oldid = $this->getOldID();
1013                 $parserOptions = $this->getParserOptions();
1014
1015                 # Render printable version, use printable version cache
1016                 $parserOptions->setIsPrintable( $wgOut->isPrintable() );
1017
1018                 # Don't show section-edit links on old revisions... this way lies madness.
1019                 if ( !$this->isCurrent() || $wgOut->isPrintable() || !$this->getTitle()->quickUserCan( 'edit' ) ) {
1020                         $parserOptions->setEditSection( false );
1021                 }
1022
1023                 $useParserCache = $this->useParserCache( $oldid );
1024                 $this->outputWikiText( $this->getContent(), $useParserCache, $parserOptions );
1025
1026                 return true;
1027         }
1028
1029         /**
1030          * Try to fetch an expired entry from the parser cache. If it is present,
1031          * output it and return true. If it is not present, output nothing and
1032          * return false. This is used as a callback function for
1033          * PoolCounter::executeProtected().
1034          *
1035          * @return boolean
1036          */
1037         public function tryDirtyCache() {
1038                 global $wgOut;
1039                 $parserCache = ParserCache::singleton();
1040                 $options = $this->getParserOptions();
1041
1042                 if ( $wgOut->isPrintable() ) {
1043                         $options->setIsPrintable( true );
1044                         $options->setEditSection( false );
1045                 }
1046
1047                 $output = $parserCache->getDirty( $this, $options );
1048
1049                 if ( $output ) {
1050                         wfDebug( __METHOD__ . ": sending dirty output\n" );
1051                         wfDebugLog( 'dirty', "dirty output " . $parserCache->getKey( $this, $options ) . "\n" );
1052                         $wgOut->setSquidMaxage( 0 );
1053                         $this->mParserOutput = $output;
1054                         $wgOut->addParserOutput( $output );
1055                         $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
1056
1057                         return true;
1058                 } else {
1059                         wfDebugLog( 'dirty', "dirty missing\n" );
1060                         wfDebug( __METHOD__ . ": no dirty cache\n" );
1061
1062                         return false;
1063                 }
1064         }
1065
1066         /**
1067          * View redirect
1068          *
1069          * @param $target Title|Array of destination(s) to redirect
1070          * @param $appendSubtitle Boolean [optional]
1071          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1072          * @return string containing HMTL with redirect link
1073          */
1074         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1075                 global $wgOut, $wgStylePath;
1076
1077                 if ( !is_array( $target ) ) {
1078                         $target = array( $target );
1079                 }
1080
1081                 $lang = $this->getTitle()->getPageLanguage();
1082                 $imageDir = $lang->getDir();
1083
1084                 if ( $appendSubtitle ) {
1085                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1086                 }
1087
1088                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1089                 $title = array_shift( $target );
1090
1091                 if ( $forceKnown ) {
1092                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1093                 } else {
1094                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1095                 }
1096
1097                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1098                 $alt = $lang->isRTL() ? '←' : '→';
1099                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1100                 foreach ( $target as $rt ) {
1101                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1102                         if ( $forceKnown ) {
1103                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1104                         } else {
1105                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1106                         }
1107                 }
1108
1109                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1110                 return '<div class="redirectMsg">' .
1111                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1112                         '<span class="redirectText">' . $link . '</span></div>';
1113         }
1114
1115         /**
1116          * Builds trackback links for article display if $wgUseTrackbacks is set to true
1117          */
1118         public function addTrackbacks() {
1119                 global $wgOut;
1120
1121                 $dbr = wfGetDB( DB_SLAVE );
1122                 $tbs = $dbr->select( 'trackbacks',
1123                         array( 'tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name' ),
1124                         array( 'tb_page' => $this->mPage->getID() )
1125                 );
1126
1127                 if ( !$dbr->numRows( $tbs ) ) {
1128                         return;
1129                 }
1130
1131                 $wgOut->preventClickjacking();
1132
1133                 $tbtext = "";
1134                 foreach ( $tbs as $o ) {
1135                         $rmvtxt = "";
1136
1137                         if ( $this->getContext()->getUser()->isAllowed( 'trackback' ) ) {
1138                                 $delurl = $this->getTitle()->getFullURL( "action=deletetrackback&tbid=" .
1139                                         $o->tb_id . "&token=" . urlencode( $this->getContext()->getUser()->editToken() ) );
1140                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
1141                         }
1142
1143                         $tbtext .= "\n";
1144                         $tbtext .= wfMsgNoTrans( strlen( $o->tb_ex ) ? 'trackbackexcerpt' : 'trackback',
1145                                         $o->tb_title,
1146                                         $o->tb_url,
1147                                         $o->tb_ex,
1148                                         $o->tb_name,
1149                                         $rmvtxt );
1150                 }
1151
1152                 $wgOut->wrapWikiMsg( "<div id='mw_trackbacks'>\n$1\n</div>\n", array( 'trackbackbox', $tbtext ) );
1153         }
1154
1155         /**
1156          * Removes trackback record for current article from trackbacks table
1157          * @deprecated since 1.18
1158          */
1159         public function deletetrackback() {
1160                 return Action::factory( 'deletetrackback', $this )->show();
1161         }
1162
1163         /**
1164          * Handle action=render
1165          */
1166
1167         public function render() {
1168                 global $wgOut;
1169
1170                 $wgOut->setArticleBodyOnly( true );
1171                 $this->view();
1172         }
1173
1174         /**
1175          * Handle action=purge
1176          */
1177         public function purge() {
1178                 return Action::factory( 'purge', $this )->show();
1179         }
1180
1181         /**
1182          * Mark this particular edit/page as patrolled
1183          * @deprecated since 1.18
1184          */
1185         public function markpatrolled() {
1186                 Action::factory( 'markpatrolled', $this )->show();
1187         }
1188
1189         /**
1190          * User-interface handler for the "watch" action.
1191          * Requires Request to pass a token as of 1.18.
1192          * @deprecated since 1.18
1193          */
1194         public function watch() {
1195                 Action::factory( 'watch', $this )->show();
1196         }
1197
1198         /**
1199          * Add this page to $wgUser's watchlist
1200          *
1201          * This is safe to be called multiple times
1202          *
1203          * @return bool true on successful watch operation
1204          * @deprecated since 1.18
1205          */
1206         public function doWatch() {
1207                 global $wgUser;
1208                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1209         }
1210
1211         /**
1212          * User interface handler for the "unwatch" action.
1213          * Requires Request to pass a token as of 1.18.
1214          * @deprecated since 1.18
1215          */
1216         public function unwatch() {
1217                 Action::factory( 'unwatch', $this )->show();
1218         }
1219
1220         /**
1221          * Stop watching a page
1222          * @return bool true on successful unwatch
1223          * @deprecated since 1.18
1224          */
1225         public function doUnwatch() {
1226                 global $wgUser;
1227                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1228         }
1229
1230         /**
1231          * action=protect handler
1232          */
1233         public function protect() {
1234                 $form = new ProtectionForm( $this );
1235                 $form->execute();
1236         }
1237
1238         /**
1239          * action=unprotect handler (alias)
1240          */
1241         public function unprotect() {
1242                 $this->protect();
1243         }
1244
1245         /**
1246          * Info about this page
1247          * Called for ?action=info when $wgAllowPageInfo is on.
1248          */
1249         public function info() {
1250                 Action::factory( 'info', $this )->show();
1251         }
1252
1253         /**
1254          * Overriden by ImagePage class, only present here to avoid a fatal error
1255          * Called for ?action=revert
1256          */
1257         public function revert() {
1258                 Action::factory( 'revert', $this )->show();
1259         }
1260
1261         /**
1262          * User interface for rollback operations
1263          */
1264         public function rollback() {
1265                 Action::factory( 'rollback', $this )->show();
1266         }
1267
1268         /**
1269          * Output a redirect back to the article.
1270          * This is typically used after an edit.
1271          *
1272          * @deprecated in 1.18; call $wgOut->redirect() directly
1273          * @param $noRedir Boolean: add redirect=no
1274          * @param $sectionAnchor String: section to redirect to, including "#"
1275          * @param $extraQuery String: extra query params
1276          */
1277         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1278                 wfDeprecated( __METHOD__ );
1279                 global $wgOut;
1280
1281                 if ( $noRedir ) {
1282                         $query = 'redirect=no';
1283                         if ( $extraQuery )
1284                                 $query .= "&$extraQuery";
1285                 } else {
1286                         $query = $extraQuery;
1287                 }
1288
1289                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1290         }
1291
1292         /**
1293          * UI entry point for page deletion
1294          */
1295         public function delete() {
1296                 global $wgOut, $wgRequest;
1297
1298                 $confirm = $wgRequest->wasPosted() &&
1299                                 $this->getContext()->getUser()->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1300
1301                 $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1302                 $this->DeleteReason = $wgRequest->getText( 'wpReason' );
1303
1304                 $reason = $this->DeleteReasonList;
1305
1306                 if ( $reason != 'other' && $this->DeleteReason != '' ) {
1307                         // Entry from drop down menu + additional comment
1308                         $reason .= wfMsgForContent( 'colon-separator' ) . $this->DeleteReason;
1309                 } elseif ( $reason == 'other' ) {
1310                         $reason = $this->DeleteReason;
1311                 }
1312
1313                 # Flag to hide all contents of the archived revisions
1314                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $this->getContext()->getUser()->isAllowed( 'suppressrevision' );
1315
1316                 # This code desperately needs to be totally rewritten
1317
1318                 # Read-only check...
1319                 if ( wfReadOnly() ) {
1320                         $wgOut->readOnlyPage();
1321
1322                         return;
1323                 }
1324
1325                 # Check permissions
1326                 $permission_errors = $this->getTitle()->getUserPermissionsErrors( 'delete', $this->getContext()->getUser() );
1327
1328                 if ( count( $permission_errors ) > 0 ) {
1329                         $wgOut->showPermissionsErrorPage( $permission_errors );
1330
1331                         return;
1332                 }
1333
1334                 $wgOut->setPagetitle( wfMsg( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1335
1336                 # Better double-check that it hasn't been deleted yet!
1337                 $dbw = wfGetDB( DB_MASTER );
1338                 $conds = $this->getTitle()->pageCond();
1339                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1340                 if ( $latest === false ) {
1341                         $wgOut->showFatalError(
1342                                 Html::rawElement(
1343                                         'div',
1344                                         array( 'class' => 'error mw-error-cannotdelete' ),
1345                                         wfMsgExt( 'cannotdelete', array( 'parse' ),
1346                                                 wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1347                                 )
1348                         );
1349                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1350                         LogEventsList::showLogExtract(
1351                                 $wgOut,
1352                                 'delete',
1353                                 $this->getTitle()->getPrefixedText()
1354                         );
1355
1356                         return;
1357                 }
1358
1359                 # Hack for big sites
1360                 $bigHistory = $this->mPage->isBigDeletion();
1361                 if ( $bigHistory && !$this->getTitle()->userCan( 'bigdelete' ) ) {
1362                         global $wgLang, $wgDeleteRevisionsLimit;
1363
1364                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1365                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1366
1367                         return;
1368                 }
1369
1370                 if ( $confirm ) {
1371                         $this->doDelete( $reason, $suppress );
1372
1373                         if ( $wgRequest->getCheck( 'wpWatch' ) && $this->getContext()->getUser()->isLoggedIn() ) {
1374                                 $this->doWatch();
1375                         } elseif ( $this->getTitle()->userIsWatching() ) {
1376                                 $this->doUnwatch();
1377                         }
1378
1379                         return;
1380                 }
1381
1382                 // Generate deletion reason
1383                 $hasHistory = false;
1384                 if ( !$reason ) {
1385                         $reason = $this->generateReason( $hasHistory );
1386                 }
1387
1388                 // If the page has a history, insert a warning
1389                 if ( $hasHistory && !$confirm ) {
1390                         global $wgLang;
1391
1392                         $revisions = $this->mPage->estimateRevisionCount();
1393                         // @todo FIXME: i18n issue/patchwork message
1394                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1395                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1396                                 wfMsgHtml( 'word-separator' ) . Linker::link( $this->getTitle(),
1397                                         wfMsgHtml( 'history' ),
1398                                         array( 'rel' => 'archives' ),
1399                                         array( 'action' => 'history' ) ) .
1400                                 '</strong>'
1401                         );
1402
1403                         if ( $bigHistory ) {
1404                                 global $wgDeleteRevisionsLimit;
1405                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1406                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1407                         }
1408                 }
1409
1410                 return $this->confirmDelete( $reason );
1411         }
1412
1413         /**
1414          * Output deletion confirmation dialog
1415          * @todo FIXME: Move to another file?
1416          * @param $reason String: prefilled reason
1417          */
1418         public function confirmDelete( $reason ) {
1419                 global $wgOut;
1420
1421                 wfDebug( "Article::confirmDelete\n" );
1422
1423                 $deleteBackLink = Linker::linkKnown( $this->getTitle() );
1424                 $wgOut->setSubtitle( wfMsgHtml( 'delete-backlink', $deleteBackLink ) );
1425                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1426                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1427
1428                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1429
1430                 if ( $this->getContext()->getUser()->isAllowed( 'suppressrevision' ) ) {
1431                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1432                                         <td></td>
1433                                         <td class='mw-input'><strong>" .
1434                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1435                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1436                                         "</strong></td>
1437                                 </tr>";
1438                 } else {
1439                         $suppress = '';
1440                 }
1441                 $checkWatch = $this->getContext()->getUser()->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1442
1443                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1444                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1445                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1446                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1447                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1448                         "<tr id=\"wpDeleteReasonListRow\">
1449                                 <td class='mw-label'>" .
1450                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1451                                 "</td>
1452                                 <td class='mw-input'>" .
1453                                         Xml::listDropDown( 'wpDeleteReasonList',
1454                                                 wfMsgForContent( 'deletereason-dropdown' ),
1455                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1456                                 "</td>
1457                         </tr>
1458                         <tr id=\"wpDeleteReasonRow\">
1459                                 <td class='mw-label'>" .
1460                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1461                                 "</td>
1462                                 <td class='mw-input'>" .
1463                                 Html::input( 'wpReason', $reason, 'text', array(
1464                                         'size' => '60',
1465                                         'maxlength' => '255',
1466                                         'tabindex' => '2',
1467                                         'id' => 'wpReason',
1468                                         'autofocus'
1469                                 ) ) .
1470                                 "</td>
1471                         </tr>";
1472
1473                 # Disallow watching if user is not logged in
1474                 if ( $this->getContext()->getUser()->isLoggedIn() ) {
1475                         $form .= "
1476                         <tr>
1477                                 <td></td>
1478                                 <td class='mw-input'>" .
1479                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1480                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1481                                 "</td>
1482                         </tr>";
1483                 }
1484
1485                 $form .= "
1486                         $suppress
1487                         <tr>
1488                                 <td></td>
1489                                 <td class='mw-submit'>" .
1490                                         Xml::submitButton( wfMsg( 'deletepage' ),
1491                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1492                                 "</td>
1493                         </tr>" .
1494                         Xml::closeElement( 'table' ) .
1495                         Xml::closeElement( 'fieldset' ) .
1496                         Html::hidden( 'wpEditToken', $this->getContext()->getUser()->editToken() ) .
1497                         Xml::closeElement( 'form' );
1498
1499                         if ( $this->getContext()->getUser()->isAllowed( 'editinterface' ) ) {
1500                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1501                                 $link = Linker::link(
1502                                         $title,
1503                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1504                                         array(),
1505                                         array( 'action' => 'edit' )
1506                                 );
1507                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1508                         }
1509
1510                 $wgOut->addHTML( $form );
1511                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1512                 LogEventsList::showLogExtract( $wgOut, 'delete',
1513                         $this->getTitle()->getPrefixedText()
1514                 );
1515         }
1516
1517         /**
1518          * Perform a deletion and output success or failure messages
1519          */
1520         public function doDelete( $reason, $suppress = false ) {
1521                 global $wgOut;
1522
1523                 $id = $this->getTitle()->getArticleID( Title::GAID_FOR_UPDATE );
1524
1525                 $error = '';
1526                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, $id, $error ) ) {
1527                         $deleted = $this->getTitle()->getPrefixedText();
1528
1529                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1530                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1531
1532                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1533
1534                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1535                         $wgOut->returnToMain( false );
1536                 } else {
1537                         if ( $error == '' ) {
1538                                 $wgOut->showFatalError(
1539                                         Html::rawElement(
1540                                                 'div',
1541                                                 array( 'class' => 'error mw-error-cannotdelete' ),
1542                                                 wfMsgExt( 'cannotdelete', array( 'parse' ),
1543                                                         wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1544                                         )
1545                                 );
1546
1547                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1548
1549                                 LogEventsList::showLogExtract(
1550                                         $wgOut,
1551                                         'delete',
1552                                         $this->getTitle()->getPrefixedText()
1553                                 );
1554                         } else {
1555                                 $wgOut->showFatalError( $error );
1556                         }
1557                 }
1558         }
1559
1560         /**
1561          * Generate the navigation links when browsing through an article revisions
1562          * It shows the information as:
1563          *   Revision as of \<date\>; view current revision
1564          *   \<- Previous version | Next Version -\>
1565          *
1566          * @param $oldid String: revision ID of this article revision
1567          */
1568         public function setOldSubtitle( $oldid = 0 ) {
1569                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1570
1571                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1572                         return;
1573                 }
1574
1575                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1576
1577                 # Cascade unhide param in links for easy deletion browsing
1578                 $extraParams = array();
1579                 if ( $wgRequest->getVal( 'unhide' ) ) {
1580                         $extraParams['unhide'] = 1;
1581                 }
1582
1583                 $revision = Revision::newFromId( $oldid );
1584                 $timestamp = $revision->getTimestamp();
1585
1586                 $current = ( $oldid == $this->mPage->getLatest() );
1587                 $td = $wgLang->timeanddate( $timestamp, true );
1588                 $tddate = $wgLang->date( $timestamp, true );
1589                 $tdtime = $wgLang->time( $timestamp, true );
1590
1591                 $lnk = $current
1592                         ? wfMsgHtml( 'currentrevisionlink' )
1593                         : Linker::link(
1594                                 $this->getTitle(),
1595                                 wfMsgHtml( 'currentrevisionlink' ),
1596                                 array(),
1597                                 $extraParams,
1598                                 array( 'known', 'noclasses' )
1599                         );
1600                 $curdiff = $current
1601                         ? wfMsgHtml( 'diff' )
1602                         : Linker::link(
1603                                 $this->getTitle(),
1604                                 wfMsgHtml( 'diff' ),
1605                                 array(),
1606                                 array(
1607                                         'diff' => 'cur',
1608                                         'oldid' => $oldid
1609                                 ) + $extraParams,
1610                                 array( 'known', 'noclasses' )
1611                         );
1612                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1613                 $prevlink = $prev
1614                         ? Linker::link(
1615                                 $this->getTitle(),
1616                                 wfMsgHtml( 'previousrevision' ),
1617                                 array(),
1618                                 array(
1619                                         'direction' => 'prev',
1620                                         'oldid' => $oldid
1621                                 ) + $extraParams,
1622                                 array( 'known', 'noclasses' )
1623                         )
1624                         : wfMsgHtml( 'previousrevision' );
1625                 $prevdiff = $prev
1626                         ? Linker::link(
1627                                 $this->getTitle(),
1628                                 wfMsgHtml( 'diff' ),
1629                                 array(),
1630                                 array(
1631                                         'diff' => 'prev',
1632                                         'oldid' => $oldid
1633                                 ) + $extraParams,
1634                                 array( 'known', 'noclasses' )
1635                         )
1636                         : wfMsgHtml( 'diff' );
1637                 $nextlink = $current
1638                         ? wfMsgHtml( 'nextrevision' )
1639                         : Linker::link(
1640                                 $this->getTitle(),
1641                                 wfMsgHtml( 'nextrevision' ),
1642                                 array(),
1643                                 array(
1644                                         'direction' => 'next',
1645                                         'oldid' => $oldid
1646                                 ) + $extraParams,
1647                                 array( 'known', 'noclasses' )
1648                         );
1649                 $nextdiff = $current
1650                         ? wfMsgHtml( 'diff' )
1651                         : Linker::link(
1652                                 $this->getTitle(),
1653                                 wfMsgHtml( 'diff' ),
1654                                 array(),
1655                                 array(
1656                                         'diff' => 'next',
1657                                         'oldid' => $oldid
1658                                 ) + $extraParams,
1659                                 array( 'known', 'noclasses' )
1660                         );
1661
1662                 $cdel = '';
1663
1664                 // User can delete revisions or view deleted revisions...
1665                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1666                 if ( $canHide || ( $revision->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
1667                         if ( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
1668                                 $cdel = Linker::revDeleteLinkDisabled( $canHide ); // rev was hidden from Sysops
1669                         } else {
1670                                 $query = array(
1671                                         'type'   => 'revision',
1672                                         'target' => $this->getTitle()->getPrefixedDbkey(),
1673                                         'ids'    => $oldid
1674                                 );
1675                                 $cdel = Linker::revDeleteLink( $query, $revision->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1676                         }
1677                         $cdel .= ' ';
1678                 }
1679
1680                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1681                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1682
1683                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1684                         ? 'revision-info-current'
1685                         : 'revision-info';
1686
1687                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" .
1688                         wfMsgExt(
1689                                 $infomsg,
1690                                 array( 'parseinline', 'replaceafter' ),
1691                                 $td,
1692                                 $userlinks,
1693                                 $revision->getID(),
1694                                 $tddate,
1695                                 $tdtime,
1696                                 $revision->getUser()
1697                         ) .
1698                         "</div>\n" .
1699                         "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1700                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
1701
1702                 $wgOut->setSubtitle( $r );
1703         }
1704
1705         /* Caching functions */
1706
1707         /**
1708          * checkLastModified returns true if it has taken care of all
1709          * output to the client that is necessary for this request.
1710          * (that is, it has sent a cached version of the page)
1711          *
1712          * @return boolean true if cached version send, false otherwise
1713          */
1714         protected function tryFileCache() {
1715                 static $called = false;
1716
1717                 if ( $called ) {
1718                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1719                         return false;
1720                 }
1721
1722                 $called = true;
1723                 if ( $this->isFileCacheable() ) {
1724                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1725                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1726                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1727                                 $cache->loadFromFileCache( $this->getContext() );
1728                                 return true;
1729                         } else {
1730                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1731                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1732                         }
1733                 } else {
1734                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1735                 }
1736
1737                 return false;
1738         }
1739
1740         /**
1741          * Check if the page can be cached
1742          * @return bool
1743          */
1744         public function isFileCacheable() {
1745                 $cacheable = false;
1746
1747                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1748                         $cacheable = $this->mPage->getID()
1749                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1750                         // Extension may have reason to disable file caching on some pages.
1751                         if ( $cacheable ) {
1752                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1753                         }
1754                 }
1755
1756                 return $cacheable;
1757         }
1758
1759         /**#@-*/
1760
1761         /**
1762          * Add the primary page-view wikitext to the output buffer
1763          * Saves the text into the parser cache if possible.
1764          * Updates templatelinks if it is out of date.
1765          *
1766          * @param $text String
1767          * @param $cache Boolean
1768          * @param $parserOptions mixed ParserOptions object, or boolean false
1769          */
1770         public function outputWikiText( $text, $cache = true, $parserOptions = false ) {
1771                 global $wgOut;
1772
1773                 $this->mParserOutput = $this->getOutputFromWikitext( $text, $cache, $parserOptions );
1774
1775                 $this->doCascadeProtectionUpdates( $this->mParserOutput );
1776
1777                 $wgOut->addParserOutput( $this->mParserOutput );
1778         }
1779
1780         /**
1781          * Lightweight method to get the parser output for a page, checking the parser cache
1782          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1783          * consider, so it's not appropriate to use there.
1784          *
1785          * @since 1.16 (r52326) for LiquidThreads
1786          *
1787          * @param $oldid mixed integer Revision ID or null
1788          * @param $user User The relevant user
1789          * @return ParserOutput or false if the given revsion ID is not found
1790          */
1791         public function getParserOutput( $oldid = null, User $user = null ) {
1792                 global $wgEnableParserCache, $wgUser;
1793                 $user = is_null( $user ) ? $wgUser : $user;
1794
1795                 wfProfileIn( __METHOD__ );
1796                 // Should the parser cache be used?
1797                 $useParserCache = $wgEnableParserCache &&
1798                         $user->getStubThreshold() == 0 &&
1799                         $this->mPage->exists() &&
1800                         $oldid === null;
1801
1802                 wfDebug( __METHOD__ . ': using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
1803
1804                 if ( $user->getStubThreshold() ) {
1805                         wfIncrStats( 'pcache_miss_stub' );
1806                 }
1807
1808                 if ( $useParserCache ) {
1809                         $options = $this->mPage->makeParserOptions( $user );
1810                         $parserOutput = ParserCache::singleton()->get( $this, $options );
1811                         if ( $parserOutput !== false ) {
1812                                 wfProfileOut( __METHOD__ );
1813                                 return $parserOutput;
1814                         }
1815                 }
1816
1817                 // Cache miss; parse and output it.
1818                 if ( $oldid === null ) {
1819                         $text = $this->mPage->getRawText();
1820                 } else {
1821                         $rev = Revision::newFromTitle( $this->getTitle(), $oldid );
1822                         if ( $rev === null ) {
1823                                 wfProfileOut( __METHOD__ );
1824                                 return false;
1825                         }
1826                         $text = $rev->getText();
1827                 }
1828
1829                 $output = $this->getOutputFromWikitext( $text, $useParserCache );
1830                 wfProfileOut( __METHOD__ );
1831                 return $output;
1832         }
1833
1834         /**
1835          * This does all the heavy lifting for outputWikitext, except it returns the parser
1836          * output instead of sending it straight to $wgOut. Makes things nice and simple for,
1837          * say, embedding thread pages within a discussion system (LiquidThreads)
1838          *
1839          * @param $text string
1840          * @param $cache boolean
1841          * @param $parserOptions parsing options, defaults to false
1842          * @return ParserOutput
1843          */
1844         public function getOutputFromWikitext( $text, $cache = true, $parserOptions = false ) {
1845                 global $wgParser, $wgEnableParserCache, $wgUseFileCache;
1846
1847                 if ( !$parserOptions ) {
1848                         $parserOptions = $this->getParserOptions();
1849                 }
1850
1851                 $time = - wfTime();
1852                 $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(),
1853                         $parserOptions, true, true, $this->getRevIdFetched() );
1854                 $time += wfTime();
1855
1856                 # Timing hack
1857                 if ( $time > 3 ) {
1858                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
1859                                 $this->getTitle()->getPrefixedDBkey() ) );
1860                 }
1861
1862                 if ( $wgEnableParserCache && $cache && $this->mParserOutput->isCacheable() ) {
1863                         $parserCache = ParserCache::singleton();
1864                         $parserCache->save( $this->mParserOutput, $this, $parserOptions );
1865                 }
1866
1867                 // Make sure file cache is not used on uncacheable content.
1868                 // Output that has magic words in it can still use the parser cache
1869                 // (if enabled), though it will generally expire sooner.
1870                 if ( !$this->mParserOutput->isCacheable() || $this->mParserOutput->containsOldMagic() ) {
1871                         $wgUseFileCache = false;
1872                 }
1873
1874                 if ( $this->isCurrent() ) {
1875                         $this->mPage->doCascadeProtectionUpdates( $this->mParserOutput );
1876                 }
1877
1878                 return $this->mParserOutput;
1879         }
1880
1881         /**
1882          * Get parser options suitable for rendering the primary article wikitext
1883          * @return mixed ParserOptions object or boolean false
1884          */
1885         public function getParserOptions() {
1886                 global $wgUser;
1887                 if ( !$this->mParserOptions ) {
1888                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1889                 }
1890                 // Clone to allow modifications of the return value without affecting cache
1891                 return clone $this->mParserOptions;
1892         }
1893
1894         /**
1895          * Sets the context this Article is executed in
1896          *
1897          * @param $context IContextSource
1898          * @since 1.18
1899          */
1900         public function setContext( $context ) {
1901                 $this->mContext = $context;
1902         }
1903
1904         /**
1905          * Gets the context this Article is executed in
1906          *
1907          * @return IContextSource
1908          * @since 1.18
1909          */
1910         public function getContext() {
1911                 if ( $this->mContext instanceof IContextSource ) {
1912                         return $this->mContext;
1913                 } else {
1914                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1915                         return RequestContext::getMain();
1916                 }
1917         }
1918
1919         /**
1920          * Use PHP's magic __get handler to handle accessing of
1921          * raw WikiPage fields for backwards compatibility.
1922          *
1923          * @param $fname String Field name
1924          */
1925         public function __get( $fname ) {
1926                 if ( property_exists( $this->mPage, $fname ) ) {
1927                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1928                         return $this->mPage->$fname;
1929                 }
1930                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1931         }
1932
1933         /**
1934          * Use PHP's magic __set handler to handle setting of
1935          * raw WikiPage fields for backwards compatibility.
1936          *
1937          * @param $fname String Field name
1938          * @param $fvalue mixed New value
1939          */
1940         public function __set( $fname, $fvalue ) {
1941                 if ( property_exists( $this->mPage, $fname ) ) {
1942                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1943                         $this->mPage->$fname = $fvalue;
1944                 // Note: extensions may want to toss on new fields
1945                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1946                         $this->mPage->$fname = $fvalue;
1947                 } else {
1948                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1949                 }
1950         }
1951
1952         /**
1953          * Use PHP's magic __call handler to transform instance calls to
1954          * WikiPage functions for backwards compatibility.
1955          *
1956          * @param $fname String Name of called method
1957          * @param $args Array Arguments to the method
1958          */
1959         public function __call( $fname, $args ) {
1960                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1961                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1962                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1963                 }
1964                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1965         }
1966
1967         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1968         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1969                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1970         }
1971
1972         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1973                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1974         }
1975
1976         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1977                 global $wgUser;
1978                 $user = is_null( $user ) ? $wgUser : $user;
1979                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1980         }
1981
1982         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1983                 global $wgUser;
1984                 $guser = is_null( $guser ) ? $wgUser : $guser;
1985                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1986         }
1987
1988         public function generateReason( &$hasHistory ) {
1989                 return $this->mPage->getAutoDeleteReason( $hasHistory );
1990         }
1991
1992         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1993         public static function selectFields() {
1994                 return WikiPage::selectFields();
1995         }
1996
1997         public static function onArticleCreate( $title ) {
1998                 return WikiPage::onArticleCreate( $title );
1999         }
2000
2001         public static function onArticleDelete( $title ) {
2002                 return WikiPage::onArticleDelete( $title );
2003         }
2004
2005         public static function onArticleEdit( $title ) {
2006                 return WikiPage::onArticleEdit( $title );
2007         }
2008
2009         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2010                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2011         }
2012         // ******
2013 }
2014
2015 class PoolWorkArticleView extends PoolCounterWork {
2016
2017         /**
2018          * @var Article
2019          */
2020         private $mArticle;
2021
2022         function __construct( $article, $key, $useParserCache, $parserOptions ) {
2023                 parent::__construct( 'ArticleView', $key );
2024                 $this->mArticle = $article;
2025                 $this->cacheable = $useParserCache;
2026                 $this->parserOptions = $parserOptions;
2027         }
2028
2029         function doWork() {
2030                 return $this->mArticle->doViewParse();
2031         }
2032
2033         function getCachedWork() {
2034                 global $wgOut;
2035
2036                 $parserCache = ParserCache::singleton();
2037                 $this->mArticle->mParserOutput = $parserCache->get( $this->mArticle, $this->parserOptions );
2038
2039                 if ( $this->mArticle->mParserOutput !== false ) {
2040                         wfDebug( __METHOD__ . ": showing contents parsed by someone else\n" );
2041                         $wgOut->addParserOutput( $this->mArticle->mParserOutput );
2042                         # Ensure that UI elements requiring revision ID have
2043                         # the correct version information.
2044                         $wgOut->setRevisionId( $this->mArticle->getLatest() );
2045                         return true;
2046                 }
2047                 return false;
2048         }
2049
2050         function fallback() {
2051                 return $this->mArticle->tryDirtyCache();
2052         }
2053
2054         /**
2055          * @param $status Status
2056          */
2057         function error( $status ) {
2058                 global $wgOut;
2059
2060                 $wgOut->clearHTML(); // for release() errors
2061                 $wgOut->enableClientCache( false );
2062                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2063
2064                 $errortext = $status->getWikiText( false, 'view-pool-error' );
2065                 $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
2066
2067                 return false;
2068         }
2069 }