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         /**
  79          * @param $title Title
  80          * @return WikiPage
  81          */
  82         protected function newPage( Title $title ) {
  83                 return new WikiPage( $title );
  84         }
  85
  86         /**
  87          * Constructor from a page id
  88          * @param $id Int article ID to load
  89          */
  90         public static function newFromID( $id ) {
  91                 $t = Title::newFromID( $id );
  92                 # @todo FIXME: Doesn't inherit right
  93                 return $t == null ? null : new self( $t );
  94                 # return $t == null ? null : new static( $t ); // PHP 5.3
  95         }
  96
  97         /**
  98          * Create an Article object of the appropriate class for the given page.
  99          *
 100          * @param $title Title
 101          * @param $context IContextSource
 102          * @return Article object
 103          */
 104         public static function newFromTitle( $title, IContextSource $context ) {
 105                 if ( NS_MEDIA == $title->getNamespace() ) {
 106                         // FIXME: where should this go?
 107                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 108                 }
 109
 110                 $page = null;
 111                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 112                 if ( !$page ) {
 113                         switch( $title->getNamespace() ) {
 114                                 case NS_FILE:
 115                                         $page = new ImagePage( $title );
 116                                         break;
 117                                 case NS_CATEGORY:
 118                                         $page = new CategoryPage( $title );
 119                                         break;
 120                                 default:
 121                                         $page = new Article( $title );
 122                         }
 123                 }
 124                 $page->setContext( $context );
 125
 126                 return $page;
 127         }
 128
 129         /**
 130          * Tell the page view functions that this view was redirected
 131          * from another page on the wiki.
 132          * @param $from Title object.
 133          */
 134         public function setRedirectedFrom( Title $from ) {
 135                 $this->mRedirectedFrom = $from;
 136         }
 137
 138         /**
 139          * Get the title object of the article
 140          * @return Title object of this page
 141          */
 142         public function getTitle() {
 143                 return $this->mPage->getTitle();
 144         }
 145
 146         /**
 147          * Clear the object
 148          * @todo FIXME: Shouldn't this be public?
 149          * @private
 150          */
 151         public function clear() {
 152                 $this->mContentLoaded = false;
 153
 154                 $this->mRedirectedFrom = null; # Title object if set
 155                 $this->mRevIdFetched = 0;
 156                 $this->mRedirectUrl = false;
 157
 158                 $this->mPage->clear();
 159         }
 160
 161         /**
 162          * Note that getContent/loadContent do not follow redirects anymore.
 163          * If you need to fetch redirectable content easily, try
 164          * the shortcut in Article::followRedirect()
 165          *
 166          * This function has side effects! Do not use this function if you
 167          * only want the real revision text if any.
 168          *
 169          * @return Return the text of this revision
 170          */
 171         public function getContent() {
 172                 global $wgUser;
 173
 174                 wfProfileIn( __METHOD__ );
 175
 176                 if ( $this->mPage->getID() === 0 ) {
 177                         # If this is a MediaWiki:x message, then load the messages
 178                         # and return the message value for x.
 179                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 180                                 $text = $this->getTitle()->getDefaultMessageText();
 181                                 if ( $text === false ) {
 182                                         $text = '';
 183                                 }
 184                         } else {
 185                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 186                         }
 187                         wfProfileOut( __METHOD__ );
 188
 189                         return $text;
 190                 } else {
 191                         $this->loadContent();
 192                         wfProfileOut( __METHOD__ );
 193
 194                         return $this->mContent;
 195                 }
 196         }
 197
 198         /**
 199          * @return int The oldid of the article that is to be shown, 0 for the
 200          *             current revision
 201          */
 202         public function getOldID() {
 203                 if ( is_null( $this->mOldId ) ) {
 204                         $this->mOldId = $this->getOldIDFromRequest();
 205                 }
 206
 207                 return $this->mOldId;
 208         }
 209
 210         /**
 211          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 212          *
 213          * @return int The old id for the request
 214          */
 215         public function getOldIDFromRequest() {
 216                 global $wgRequest;
 217
 218                 $this->mRedirectUrl = false;
 219
 220                 $oldid = $wgRequest->getVal( 'oldid' );
 221
 222                 if ( isset( $oldid ) ) {
 223                         $oldid = intval( $oldid );
 224                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 225                                 $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 226                                 if ( $nextid ) {
 227                                         $oldid = $nextid;
 228                                 } else {
 229                                         $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 230                                 }
 231                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 232                                 $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 233                                 if ( $previd ) {
 234                                         $oldid = $previd;
 235                                 }
 236                         }
 237                 }
 238
 239                 if ( !$oldid ) {
 240                         $oldid = 0;
 241                 }
 242
 243                 return $oldid;
 244         }
 245
 246         /**
 247          * Load the revision (including text) into this object
 248          */
 249         function loadContent() {
 250                 if ( $this->mContentLoaded ) {
 251                         return;
 252                 }
 253
 254                 wfProfileIn( __METHOD__ );
 255
 256                 $this->fetchContent( $this->getOldID() );
 257
 258                 wfProfileOut( __METHOD__ );
 259         }
 260
 261         /**
 262          * Get text of an article from database
 263          * Does *NOT* follow redirects.
 264          *
 265          * @param $oldid Int: 0 for whatever the latest revision is
 266          * @return mixed string containing article contents, or false if null
 267          */
 268         function fetchContent( $oldid = 0 ) {
 269                 if ( $this->mContentLoaded ) {
 270                         return $this->mContent;
 271                 }
 272
 273                 # Pre-fill content with error message so that if something
 274                 # fails we'll have something telling us what we intended.
 275                 $t = $this->getTitle()->getPrefixedText();
 276                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 277                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 278
 279                 if ( $oldid ) {
 280                         $revision = Revision::newFromId( $oldid );
 281                         if ( !$revision ) {
 282                                 wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 283                                 return false;
 284                         }
 285                         // Revision title doesn't match the page title given?
 286                         if ( $this->mPage->getID() != $revision->getPage() ) {
 287                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 288                                 $this->mPage = call_user_func( $function, $revision->getPage() );
 289                                 if ( !$this->mPage->getId() ) {
 290                                         wfDebug( __METHOD__ . " failed to get page data linked to revision id $oldid\n" );
 291                                         return false;
 292                                 }
 293                         }
 294                 } else {
 295                         if ( !$this->mPage->getLatest() ) {
 296                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 297                                 return false;
 298                         }
 299
 300                         $revision = $this->mPage->getRevision();
 301                         if ( !$revision ) {
 302                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 303                                 return false;
 304                         }
 305                 }
 306
 307                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 308                 // We should instead work with the Revision object when we need it...
 309                 $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 310
 311                 $this->mRevIdFetched = $revision->getId();
 312                 $this->mContentLoaded = true;
 313                 $this->mRevision =& $revision;
 314
 315                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 316
 317                 return $this->mContent;
 318         }
 319
 320         /**
 321          * No-op
 322          * @deprecated since 1.18
 323          */
 324         public function forUpdate() {
 325                 wfDeprecated( __METHOD__ );
 326         }
 327
 328         /**
 329          * Returns true if the currently-referenced revision is the current edit
 330          * to this page (and it exists).
 331          * @return bool
 332          */
 333         public function isCurrent() {
 334                 # If no oldid, this is the current version.
 335                 if ( $this->getOldID() == 0 ) {
 336                         return true;
 337                 }
 338
 339                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 340         }
 341
 342         /**
 343          * Use this to fetch the rev ID used on page views
 344          *
 345          * @return int revision ID of last article revision
 346          */
 347         public function getRevIdFetched() {
 348                 if ( $this->mRevIdFetched ) {
 349                         return $this->mRevIdFetched;
 350                 } else {
 351                         return $this->mPage->getLatest();
 352                 }
 353         }
 354
 355         /**
 356          * This is the default action of the index.php entry point: just view the
 357          * page of the given title.
 358          */
 359         public function view() {
 360                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 361                 global $wgUseFileCache, $wgUseETag;
 362
 363                 wfProfileIn( __METHOD__ );
 364
 365                 # Get variables from query string
 366                 $oldid = $this->getOldID();
 367
 368                 # getOldID may want us to redirect somewhere else
 369                 if ( $this->mRedirectUrl ) {
 370                         $wgOut->redirect( $this->mRedirectUrl );
 371                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 372                         wfProfileOut( __METHOD__ );
 373
 374                         return;
 375                 }
 376
 377                 # Set page title (may be overridden by DISPLAYTITLE)
 378                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 379
 380                 # If we got diff in the query, we want to see a diff page instead of the article.
 381                 if ( $wgRequest->getCheck( 'diff' ) ) {
 382                         wfDebug( __METHOD__ . ": showing diff page\n" );
 383                         $this->showDiffPage();
 384                         wfProfileOut( __METHOD__ );
 385
 386                         return;
 387                 }
 388
 389                 $wgOut->setArticleFlag( true );
 390                 # Allow frames by default
 391                 $wgOut->allowClickjacking();
 392
 393                 $parserCache = ParserCache::singleton();
 394
 395                 $parserOptions = $this->getParserOptions();
 396                 # Render printable version, use printable version cache
 397                 if ( $wgOut->isPrintable() ) {
 398                         $parserOptions->setIsPrintable( true );
 399                         $parserOptions->setEditSection( false );
 400                 } elseif ( $wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 401                         $parserOptions->setEditSection( false );
 402                 }
 403
 404                 # Try client and file cache
 405                 if ( $oldid === 0 && $this->mPage->checkTouched() ) {
 406                         if ( $wgUseETag ) {
 407                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 408                         }
 409
 410                         # Is it client cached?
 411                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 412                                 wfDebug( __METHOD__ . ": done 304\n" );
 413                                 wfProfileOut( __METHOD__ );
 414
 415                                 return;
 416                         # Try file cache
 417                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 418                                 wfDebug( __METHOD__ . ": done file cache\n" );
 419                                 # tell wgOut that output is taken care of
 420                                 $wgOut->disable();
 421                                 $this->mPage->viewUpdates();
 422                                 wfProfileOut( __METHOD__ );
 423
 424                                 return;
 425                         }
 426                 }
 427
 428                 if ( !$wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 429                         $parserOptions->setEditSection( false );
 430                 }
 431
 432                 # Should the parser cache be used?
 433                 $useParserCache = $this->useParserCache( $oldid );
 434                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 435                 if ( $wgUser->getStubThreshold() ) {
 436                         wfIncrStats( 'pcache_miss_stub' );
 437                 }
 438
 439                 $wasRedirected = $this->showRedirectedFromHeader();
 440                 $this->showNamespaceHeader();
 441
 442                 # Iterate through the possible ways of constructing the output text.
 443                 # Keep going until $outputDone is set, or we run out of things to do.
 444                 $pass = 0;
 445                 $outputDone = false;
 446                 $this->mParserOutput = false;
 447
 448                 while ( !$outputDone && ++$pass ) {
 449                         switch( $pass ) {
 450                                 case 1:
 451                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 452                                         break;
 453                                 case 2:
 454                                         # Try the parser cache
 455                                         if ( $useParserCache ) {
 456                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 457
 458                                                 if ( $this->mParserOutput !== false ) {
 459                                                         wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 460                                                         $wgOut->addParserOutput( $this->mParserOutput );
 461                                                         # Ensure that UI elements requiring revision ID have
 462                                                         # the correct version information.
 463                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 464                                                         $outputDone = true;
 465                                                         # Preload timestamp to avoid a DB hit
 466                                                         if ( isset( $this->mParserOutput->mTimestamp ) ) {
 467                                                                 $this->mPage->setTimestamp( $this->mParserOutput->mTimestamp );
 468                                                         }
 469                                                 }
 470                                         }
 471                                         break;
 472                                 case 3:
 473                                         $text = $this->getContent();
 474                                         if ( $text === false || $this->mPage->getID() == 0 ) {
 475                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 476                                                 $this->showMissingArticle();
 477                                                 wfProfileOut( __METHOD__ );
 478                                                 return;
 479                                         }
 480
 481                                         # Another whitelist check in case oldid is altering the title
 482                                         if ( !$this->getTitle()->userCanRead() ) {
 483                                                 wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 484                                                 $wgOut->loginToUse();
 485                                                 $wgOut->output();
 486                                                 $wgOut->disable();
 487                                                 wfProfileOut( __METHOD__ );
 488                                                 return;
 489                                         }
 490
 491                                         # Are we looking at an old revision
 492                                         if ( $oldid && !is_null( $this->mRevision ) ) {
 493                                                 $this->setOldSubtitle( $oldid );
 494
 495                                                 if ( !$this->showDeletedRevisionHeader() ) {
 496                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 497                                                         wfProfileOut( __METHOD__ );
 498                                                         return;
 499                                                 }
 500
 501                                                 # If this "old" version is the current, then try the parser cache...
 502                                                 if ( $oldid === $this->mPage->getLatest() && $this->useParserCache( false ) ) {
 503                                                         $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 504                                                         if ( $this->mParserOutput ) {
 505                                                                 wfDebug( __METHOD__ . ": showing parser cache for current rev permalink\n" );
 506                                                                 $wgOut->addParserOutput( $this->mParserOutput );
 507                                                                 $wgOut->setRevisionId( $this->mPage->getLatest() );
 508                                                                 $outputDone = true;
 509                                                                 break;
 510                                                         }
 511                                                 }
 512                                         }
 513
 514                                         # Ensure that UI elements requiring revision ID have
 515                                         # the correct version information.
 516                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 517
 518                                         # Pages containing custom CSS or JavaScript get special treatment
 519                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 520                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 521                                                 $this->showCssOrJsPage();
 522                                                 $outputDone = true;
 523                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 524                                                 # Allow extensions do their own custom view for certain pages
 525                                                 $outputDone = true;
 526                                         } else {
 527                                                 $rt = Title::newFromRedirectArray( $text );
 528                                                 if ( $rt ) {
 529                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 530                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 531                                                         # Don't append the subtitle if this was an old revision
 532                                                         $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
 533                                                         # Parse just to get categories, displaytitle, etc.
 534                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 535                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 536                                                         $outputDone = true;
 537                                                 }
 538                                         }
 539                                         break;
 540                                 case 4:
 541                                         # Run the parse, protected by a pool counter
 542                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 543
 544                                         $key = $parserCache->getKey( $this, $parserOptions );
 545                                         $poolArticleView = new PoolWorkArticleView( $this, $key, $useParserCache, $parserOptions );
 546
 547                                         if ( !$poolArticleView->execute() ) {
 548                                                 # Connection or timeout error
 549                                                 wfProfileOut( __METHOD__ );
 550                                                 return;
 551                                         } else {
 552                                                 $outputDone = true;
 553                                         }
 554                                         break;
 555                                 # Should be unreachable, but just in case...
 556                                 default:
 557                                         break 2;
 558                         }
 559                 }
 560
 561                 # Get the ParserOutput actually *displayed* here.
 562                 # Note that $this->mParserOutput is the *current* version output.
 563                 $pOutput = ( $outputDone instanceof ParserOutput )
 564                         ? $outputDone // object fetched by hook
 565                         : $this->mParserOutput;
 566
 567                 # Adjust title for main page & pages with displaytitle
 568                 if ( $pOutput ) {
 569                         $this->adjustDisplayTitle( $pOutput );
 570                 }
 571
 572                 # For the main page, overwrite the <title> element with the con-
 573                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 574                 # that's not empty).
 575                 # This message always exists because it is in the i18n files
 576                 if ( $this->getTitle()->isMainPage() ) {
 577                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 578                         if ( !$msg->isDisabled() ) {
 579                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 580                         }
 581                 }
 582
 583                 # Check for any __NOINDEX__ tags on the page using $pOutput
 584                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 585                 $wgOut->setIndexPolicy( $policy['index'] );
 586                 $wgOut->setFollowPolicy( $policy['follow'] );
 587
 588                 $this->showViewFooter();
 589                 $this->mPage->viewUpdates();
 590
 591                 wfProfileOut( __METHOD__ );
 592         }
 593
 594         /*
 595          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 596          * @param $pOutput ParserOutput
 597          */
 598         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 599                 global $wgOut;
 600                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 601                 $titleText = $pOutput->getTitleText();
 602                 if ( strval( $titleText ) !== '' ) {
 603                         $wgOut->setPageTitle( $titleText );
 604                 }
 605         }
 606
 607         /**
 608          * Show a diff page according to current request variables. For use within
 609          * Article::view() only, other callers should use the DifferenceEngine class.
 610          */
 611         public function showDiffPage() {
 612                 global $wgRequest, $wgUser;
 613
 614                 $diff = $wgRequest->getVal( 'diff' );
 615                 $rcid = $wgRequest->getVal( 'rcid' );
 616                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 617                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 618                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 619                 $oldid = $this->getOldID();
 620
 621                 $de = new DifferenceEngine( $this->getTitle(), $oldid, $diff, $rcid, $purge, $unhide );
 622                 // DifferenceEngine directly fetched the revision:
 623                 $this->mRevIdFetched = $de->mNewid;
 624                 $de->showDiffPage( $diffOnly );
 625
 626                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 627                         # Run view updates for current revision only
 628                         $this->mPage->viewUpdates();
 629                 }
 630         }
 631
 632         /**
 633          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 634          * Article::view() only.
 635          *
 636          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 637          * page views.
 638          */
 639         protected function showCssOrJsPage() {
 640                 global $wgOut;
 641
 642                 $dir = $this->getContext()->getLang()->getDir();
 643                 $lang = $this->getContext()->getLang()->getCode();
 644
 645                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 646                         'clearyourcache' );
 647
 648                 // Give hooks a chance to customise the output
 649                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 650                         // Wrap the whole lot in a <pre> and don't parse
 651                         $m = array();
 652                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 653                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 654                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 655                         $wgOut->addHTML( "\n</pre>\n" );
 656                 }
 657         }
 658
 659         /**
 660          * Get the robot policy to be used for the current view
 661          * @param $action String the action= GET parameter
 662          * @param $pOutput ParserOutput
 663          * @return Array the policy that should be set
 664          * TODO: actions other than 'view'
 665          */
 666         public function getRobotPolicy( $action, $pOutput ) {
 667                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 668                 global $wgDefaultRobotPolicy, $wgRequest;
 669
 670                 $ns = $this->getTitle()->getNamespace();
 671
 672                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 673                         # Don't index user and user talk pages for blocked users (bug 11443)
 674                         if ( !$this->getTitle()->isSubpage() ) {
 675                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 676                                         return array(
 677                                                 'index'  => 'noindex',
 678                                                 'follow' => 'nofollow'
 679                                         );
 680                                 }
 681                         }
 682                 }
 683
 684                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 685                         # Non-articles (special pages etc), and old revisions
 686                         return array(
 687                                 'index'  => 'noindex',
 688                                 'follow' => 'nofollow'
 689                         );
 690                 } elseif ( $wgOut->isPrintable() ) {
 691                         # Discourage indexing of printable versions, but encourage following
 692                         return array(
 693                                 'index'  => 'noindex',
 694                                 'follow' => 'follow'
 695                         );
 696                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 697                         # For ?curid=x urls, disallow indexing
 698                         return array(
 699                                 'index'  => 'noindex',
 700                                 'follow' => 'follow'
 701                         );
 702                 }
 703
 704                 # Otherwise, construct the policy based on the various config variables.
 705                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 706
 707                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 708                         # Honour customised robot policies for this namespace
 709                         $policy = array_merge(
 710                                 $policy,
 711                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 712                         );
 713                 }
 714                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 715                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 716                         # a final sanity check that we have really got the parser output.
 717                         $policy = array_merge(
 718                                 $policy,
 719                                 array( 'index' => $pOutput->getIndexPolicy() )
 720                         );
 721                 }
 722
 723                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 724                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 725                         $policy = array_merge(
 726                                 $policy,
 727                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 728                         );
 729                 }
 730
 731                 return $policy;
 732         }
 733
 734         /**
 735          * Converts a String robot policy into an associative array, to allow
 736          * merging of several policies using array_merge().
 737          * @param $policy Mixed, returns empty array on null/false/'', transparent
 738          *            to already-converted arrays, converts String.
 739          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 740          */
 741         public static function formatRobotPolicy( $policy ) {
 742                 if ( is_array( $policy ) ) {
 743                         return $policy;
 744                 } elseif ( !$policy ) {
 745                         return array();
 746                 }
 747
 748                 $policy = explode( ',', $policy );
 749                 $policy = array_map( 'trim', $policy );
 750
 751                 $arr = array();
 752                 foreach ( $policy as $var ) {
 753                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 754                                 $arr['index'] = $var;
 755                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 756                                 $arr['follow'] = $var;
 757                         }
 758                 }
 759
 760                 return $arr;
 761         }
 762
 763         /**
 764          * If this request is a redirect view, send "redirected from" subtitle to
 765          * $wgOut. Returns true if the header was needed, false if this is not a
 766          * redirect view. Handles both local and remote redirects.
 767          *
 768          * @return boolean
 769          */
 770         public function showRedirectedFromHeader() {
 771                 global $wgOut, $wgRequest, $wgRedirectSources;
 772
 773                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 774
 775                 if ( isset( $this->mRedirectedFrom ) ) {
 776                         // This is an internally redirected page view.
 777                         // We'll need a backlink to the source page for navigation.
 778                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 779                                 $redir = Linker::link(
 780                                         $this->mRedirectedFrom,
 781                                         null,
 782                                         array(),
 783                                         array( 'redirect' => 'no' ),
 784                                         array( 'known', 'noclasses' )
 785                                 );
 786
 787                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 788                                 $wgOut->setSubtitle( $s );
 789
 790                                 // Set the fragment if one was specified in the redirect
 791                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 792                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 793                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 794                                 }
 795
 796                                 // Add a <link rel="canonical"> tag
 797                                 $wgOut->addLink( array( 'rel' => 'canonical',
 798                                         'href' => $this->getTitle()->getLocalURL() )
 799                                 );
 800
 801                                 return true;
 802                         }
 803                 } elseif ( $rdfrom ) {
 804                         // This is an externally redirected view, from some other wiki.
 805                         // If it was reported from a trusted site, supply a backlink.
 806                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 807                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 808                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 809                                 $wgOut->setSubtitle( $s );
 810
 811                                 return true;
 812                         }
 813                 }
 814
 815                 return false;
 816         }
 817
 818         /**
 819          * Show a header specific to the namespace currently being viewed, like
 820          * [[MediaWiki:Talkpagetext]]. For Article::view().
 821          */
 822         public function showNamespaceHeader() {
 823                 global $wgOut;
 824
 825                 if ( $this->getTitle()->isTalkPage() ) {
 826                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 827                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 828                         }
 829                 }
 830         }
 831
 832         /**
 833          * Show the footer section of an ordinary page view
 834          */
 835         public function showViewFooter() {
 836                 global $wgOut, $wgUseTrackbacks;
 837
 838                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 839                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 840                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 841                 }
 842
 843                 # If we have been passed an &rcid= parameter, we want to give the user a
 844                 # chance to mark this new article as patrolled.
 845                 $this->showPatrolFooter();
 846
 847                 # Trackbacks
 848                 if ( $wgUseTrackbacks ) {
 849                         $this->addTrackbacks();
 850                 }
 851
 852                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 853
 854         }
 855
 856         /**
 857          * If patrol is possible, output a patrol UI box. This is called from the
 858          * footer section of ordinary page views. If patrol is not possible or not
 859          * desired, does nothing.
 860          */
 861         public function showPatrolFooter() {
 862                 global $wgOut, $wgRequest, $wgUser;
 863
 864                 $rcid = $wgRequest->getVal( 'rcid' );
 865
 866                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 867                         return;
 868                 }
 869
 870                 $token = $wgUser->editToken( $rcid );
 871                 $wgOut->preventClickjacking();
 872
 873                 $wgOut->addHTML(
 874                         "<div class='patrollink'>" .
 875                                 wfMsgHtml(
 876                                         'markaspatrolledlink',
 877                                         Linker::link(
 878                                                 $this->getTitle(),
 879                                                 wfMsgHtml( 'markaspatrolledtext' ),
 880                                                 array(),
 881                                                 array(
 882                                                         'action' => 'markpatrolled',
 883                                                         'rcid' => $rcid,
 884                                                         'token' => $token,
 885                                                 ),
 886                                                 array( 'known', 'noclasses' )
 887                                         )
 888                                 ) .
 889                         '</div>'
 890                 );
 891         }
 892
 893         /**
 894          * Show the error text for a missing article. For articles in the MediaWiki
 895          * namespace, show the default message text. To be called from Article::view().
 896          */
 897         public function showMissingArticle() {
 898                 global $wgOut, $wgRequest, $wgUser;
 899
 900                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 901                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 902                         $parts = explode( '/', $this->getTitle()->getText() );
 903                         $rootPart = $parts[0];
 904                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 905                         $ip = User::isIP( $rootPart );
 906
 907                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 908                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
 909                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
 910                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 911                                 LogEventsList::showLogExtract(
 912                                         $wgOut,
 913                                         'block',
 914                                         $user->getUserPage()->getPrefixedText(),
 915                                         '',
 916                                         array(
 917                                                 'lim' => 1,
 918                                                 'showIfEmpty' => false,
 919                                                 'msgKey' => array(
 920                                                         'blocked-notice-logextract',
 921                                                         $user->getName() # Support GENDER in notice
 922                                                 )
 923                                         )
 924                                 );
 925                         }
 926                 }
 927
 928                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
 929
 930                 # Show delete and move logs
 931                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
 932                         array(  'lim' => 10,
 933                                 'conds' => array( "log_action != 'revision'" ),
 934                                 'showIfEmpty' => false,
 935                                 'msgKey' => array( 'moveddeleted-notice' ) )
 936                 );
 937
 938                 # Show error message
 939                 $oldid = $this->getOldID();
 940                 if ( $oldid ) {
 941                         $text = wfMsgNoTrans( 'missing-article',
 942                                 $this->getTitle()->getPrefixedText(),
 943                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
 944                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
 945                         // Use the default message text
 946                         $text = $this->getTitle()->getDefaultMessageText();
 947                 } else {
 948                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
 949                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
 950                         $errors = array_merge( $createErrors, $editErrors );
 951
 952                         if ( !count( $errors ) ) {
 953                                 $text = wfMsgNoTrans( 'noarticletext' );
 954                         } else {
 955                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
 956                         }
 957                 }
 958                 $text = "<div class='noarticletext'>\n$text\n</div>";
 959
 960                 if ( !$this->mPage->hasViewableContent() ) {
 961                         // If there's no backing content, send a 404 Not Found
 962                         // for better machine handling of broken links.
 963                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
 964                 }
 965
 966                 $wgOut->addWikiText( $text );
 967         }
 968
 969         /**
 970          * If the revision requested for view is deleted, check permissions.
 971          * Send either an error message or a warning header to $wgOut.
 972          *
 973          * @return boolean true if the view is allowed, false if not.
 974          */
 975         public function showDeletedRevisionHeader() {
 976                 global $wgOut, $wgRequest;
 977
 978                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 979                         // Not deleted
 980                         return true;
 981                 }
 982
 983                 // If the user is not allowed to see it...
 984                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 985                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 986                                 'rev-deleted-text-permission' );
 987
 988                         return false;
 989                 // If the user needs to confirm that they want to see it...
 990                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
 991                         # Give explanation and add a link to view the revision...
 992                         $oldid = intval( $this->getOldID() );
 993                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
 994                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
 995                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
 996                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 997                                 array( $msg, $link ) );
 998
 999                         return false;
1000                 // We are allowed to see...
1001                 } else {
1002                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1003                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1004                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1005
1006                         return true;
1007                 }
1008         }
1009
1010         /**
1011          * Execute the uncached parse for action=view
1012          */
1013         public function doViewParse() {
1014                 global $wgOut;
1015
1016                 $oldid = $this->getOldID();
1017                 $parserOptions = $this->getParserOptions();
1018
1019                 # Render printable version, use printable version cache
1020                 $parserOptions->setIsPrintable( $wgOut->isPrintable() );
1021
1022                 # Don't show section-edit links on old revisions... this way lies madness.
1023                 if ( !$this->isCurrent() || $wgOut->isPrintable() || !$this->getTitle()->quickUserCan( 'edit' ) ) {
1024                         $parserOptions->setEditSection( false );
1025                 }
1026
1027                 $useParserCache = $this->useParserCache( $oldid );
1028                 $this->outputWikiText( $this->getContent(), $useParserCache, $parserOptions );
1029
1030                 return true;
1031         }
1032
1033         /**
1034          * Try to fetch an expired entry from the parser cache. If it is present,
1035          * output it and return true. If it is not present, output nothing and
1036          * return false. This is used as a callback function for
1037          * PoolCounter::executeProtected().
1038          *
1039          * @return boolean
1040          */
1041         public function tryDirtyCache() {
1042                 global $wgOut;
1043                 $parserCache = ParserCache::singleton();
1044                 $options = $this->getParserOptions();
1045
1046                 if ( $wgOut->isPrintable() ) {
1047                         $options->setIsPrintable( true );
1048                         $options->setEditSection( false );
1049                 }
1050
1051                 $output = $parserCache->getDirty( $this, $options );
1052
1053                 if ( $output ) {
1054                         wfDebug( __METHOD__ . ": sending dirty output\n" );
1055                         wfDebugLog( 'dirty', "dirty output " . $parserCache->getKey( $this, $options ) . "\n" );
1056                         $wgOut->setSquidMaxage( 0 );
1057                         $this->mParserOutput = $output;
1058                         $wgOut->addParserOutput( $output );
1059                         $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
1060
1061                         return true;
1062                 } else {
1063                         wfDebugLog( 'dirty', "dirty missing\n" );
1064                         wfDebug( __METHOD__ . ": no dirty cache\n" );
1065
1066                         return false;
1067                 }
1068         }
1069
1070         /**
1071          * View redirect
1072          *
1073          * @param $target Title|Array of destination(s) to redirect
1074          * @param $appendSubtitle Boolean [optional]
1075          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1076          * @return string containing HMTL with redirect link
1077          */
1078         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1079                 global $wgOut, $wgStylePath;
1080
1081                 if ( !is_array( $target ) ) {
1082                         $target = array( $target );
1083                 }
1084
1085                 $lang = $this->getTitle()->getPageLanguage();
1086                 $imageDir = $lang->getDir();
1087
1088                 if ( $appendSubtitle ) {
1089                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1090                 }
1091
1092                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1093                 $title = array_shift( $target );
1094
1095                 if ( $forceKnown ) {
1096                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1097                 } else {
1098                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1099                 }
1100
1101                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1102                 $alt = $lang->isRTL() ? '←' : '→';
1103                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1104                 foreach ( $target as $rt ) {
1105                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1106                         if ( $forceKnown ) {
1107                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1108                         } else {
1109                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1110                         }
1111                 }
1112
1113                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1114                 return '<div class="redirectMsg">' .
1115                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1116                         '<span class="redirectText">' . $link . '</span></div>';
1117         }
1118
1119         /**
1120          * Builds trackback links for article display if $wgUseTrackbacks is set to true
1121          */
1122         public function addTrackbacks() {
1123                 global $wgOut;
1124
1125                 $dbr = wfGetDB( DB_SLAVE );
1126                 $tbs = $dbr->select( 'trackbacks',
1127                         array( 'tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name' ),
1128                         array( 'tb_page' => $this->mPage->getID() )
1129                 );
1130
1131                 if ( !$dbr->numRows( $tbs ) ) {
1132                         return;
1133                 }
1134
1135                 $wgOut->preventClickjacking();
1136
1137                 $tbtext = "";
1138                 foreach ( $tbs as $o ) {
1139                         $rmvtxt = "";
1140
1141                         if ( $this->getContext()->getUser()->isAllowed( 'trackback' ) ) {
1142                                 $delurl = $this->getTitle()->getFullURL( "action=deletetrackback&tbid=" .
1143                                         $o->tb_id . "&token=" . urlencode( $this->getContext()->getUser()->editToken() ) );
1144                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
1145                         }
1146
1147                         $tbtext .= "\n";
1148                         $tbtext .= wfMsgNoTrans( strlen( $o->tb_ex ) ? 'trackbackexcerpt' : 'trackback',
1149                                         $o->tb_title,
1150                                         $o->tb_url,
1151                                         $o->tb_ex,
1152                                         $o->tb_name,
1153                                         $rmvtxt );
1154                 }
1155
1156                 $wgOut->wrapWikiMsg( "<div id='mw_trackbacks'>\n$1\n</div>\n", array( 'trackbackbox', $tbtext ) );
1157         }
1158
1159         /**
1160          * Removes trackback record for current article from trackbacks table
1161          * @deprecated since 1.18
1162          */
1163         public function deletetrackback() {
1164                 return Action::factory( 'deletetrackback', $this )->show();
1165         }
1166
1167         /**
1168          * Handle action=render
1169          */
1170
1171         public function render() {
1172                 global $wgOut;
1173
1174                 $wgOut->setArticleBodyOnly( true );
1175                 $this->view();
1176         }
1177
1178         /**
1179          * Handle action=purge
1180          */
1181         public function purge() {
1182                 return Action::factory( 'purge', $this )->show();
1183         }
1184
1185         /**
1186          * Mark this particular edit/page as patrolled
1187          * @deprecated since 1.18
1188          */
1189         public function markpatrolled() {
1190                 Action::factory( 'markpatrolled', $this )->show();
1191         }
1192
1193         /**
1194          * User-interface handler for the "watch" action.
1195          * Requires Request to pass a token as of 1.18.
1196          * @deprecated since 1.18
1197          */
1198         public function watch() {
1199                 Action::factory( 'watch', $this )->show();
1200         }
1201
1202         /**
1203          * Add this page to $wgUser's watchlist
1204          *
1205          * This is safe to be called multiple times
1206          *
1207          * @return bool true on successful watch operation
1208          * @deprecated since 1.18
1209          */
1210         public function doWatch() {
1211                 global $wgUser;
1212                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1213         }
1214
1215         /**
1216          * User interface handler for the "unwatch" action.
1217          * Requires Request to pass a token as of 1.18.
1218          * @deprecated since 1.18
1219          */
1220         public function unwatch() {
1221                 Action::factory( 'unwatch', $this )->show();
1222         }
1223
1224         /**
1225          * Stop watching a page
1226          * @return bool true on successful unwatch
1227          * @deprecated since 1.18
1228          */
1229         public function doUnwatch() {
1230                 global $wgUser;
1231                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1232         }
1233
1234         /**
1235          * action=protect handler
1236          */
1237         public function protect() {
1238                 $form = new ProtectionForm( $this );
1239                 $form->execute();
1240         }
1241
1242         /**
1243          * action=unprotect handler (alias)
1244          */
1245         public function unprotect() {
1246                 $this->protect();
1247         }
1248
1249         /**
1250          * Info about this page
1251          * Called for ?action=info when $wgAllowPageInfo is on.
1252          */
1253         public function info() {
1254                 Action::factory( 'info', $this )->show();
1255         }
1256
1257         /**
1258          * Overriden by ImagePage class, only present here to avoid a fatal error
1259          * Called for ?action=revert
1260          */
1261         public function revert() {
1262                 Action::factory( 'revert', $this )->show();
1263         }
1264
1265         /**
1266          * User interface for rollback operations
1267          */
1268         public function rollback() {
1269                 Action::factory( 'rollback', $this )->show();
1270         }
1271
1272         /**
1273          * Output a redirect back to the article.
1274          * This is typically used after an edit.
1275          *
1276          * @deprecated in 1.18; call $wgOut->redirect() directly
1277          * @param $noRedir Boolean: add redirect=no
1278          * @param $sectionAnchor String: section to redirect to, including "#"
1279          * @param $extraQuery String: extra query params
1280          */
1281         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1282                 wfDeprecated( __METHOD__ );
1283                 global $wgOut;
1284
1285                 if ( $noRedir ) {
1286                         $query = 'redirect=no';
1287                         if ( $extraQuery )
1288                                 $query .= "&$extraQuery";
1289                 } else {
1290                         $query = $extraQuery;
1291                 }
1292
1293                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1294         }
1295
1296         /**
1297          * UI entry point for page deletion
1298          */
1299         public function delete() {
1300                 global $wgOut, $wgRequest;
1301
1302                 $confirm = $wgRequest->wasPosted() &&
1303                                 $this->getContext()->getUser()->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1304
1305                 $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1306                 $this->DeleteReason = $wgRequest->getText( 'wpReason' );
1307
1308                 $reason = $this->DeleteReasonList;
1309
1310                 if ( $reason != 'other' && $this->DeleteReason != '' ) {
1311                         // Entry from drop down menu + additional comment
1312                         $reason .= wfMsgForContent( 'colon-separator' ) . $this->DeleteReason;
1313                 } elseif ( $reason == 'other' ) {
1314                         $reason = $this->DeleteReason;
1315                 }
1316
1317                 # Flag to hide all contents of the archived revisions
1318                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $this->getContext()->getUser()->isAllowed( 'suppressrevision' );
1319
1320                 # This code desperately needs to be totally rewritten
1321
1322                 # Read-only check...
1323                 if ( wfReadOnly() ) {
1324                         $wgOut->readOnlyPage();
1325
1326                         return;
1327                 }
1328
1329                 # Check permissions
1330                 $permission_errors = $this->getTitle()->getUserPermissionsErrors( 'delete', $this->getContext()->getUser() );
1331
1332                 if ( count( $permission_errors ) > 0 ) {
1333                         $wgOut->showPermissionsErrorPage( $permission_errors );
1334
1335                         return;
1336                 }
1337
1338                 $wgOut->setPagetitle( wfMsg( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1339
1340                 # Better double-check that it hasn't been deleted yet!
1341                 $dbw = wfGetDB( DB_MASTER );
1342                 $conds = $this->getTitle()->pageCond();
1343                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1344                 if ( $latest === false ) {
1345                         $wgOut->showFatalError(
1346                                 Html::rawElement(
1347                                         'div',
1348                                         array( 'class' => 'error mw-error-cannotdelete' ),
1349                                         wfMsgExt( 'cannotdelete', array( 'parse' ),
1350                                                 wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1351                                 )
1352                         );
1353                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1354                         LogEventsList::showLogExtract(
1355                                 $wgOut,
1356                                 'delete',
1357                                 $this->getTitle()->getPrefixedText()
1358                         );
1359
1360                         return;
1361                 }
1362
1363                 # Hack for big sites
1364                 $bigHistory = $this->mPage->isBigDeletion();
1365                 if ( $bigHistory && !$this->getTitle()->userCan( 'bigdelete' ) ) {
1366                         global $wgLang, $wgDeleteRevisionsLimit;
1367
1368                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1369                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1370
1371                         return;
1372                 }
1373
1374                 if ( $confirm ) {
1375                         $this->doDelete( $reason, $suppress );
1376
1377                         if ( $wgRequest->getCheck( 'wpWatch' ) && $this->getContext()->getUser()->isLoggedIn() ) {
1378                                 $this->doWatch();
1379                         } elseif ( $this->getTitle()->userIsWatching() ) {
1380                                 $this->doUnwatch();
1381                         }
1382
1383                         return;
1384                 }
1385
1386                 // Generate deletion reason
1387                 $hasHistory = false;
1388                 if ( !$reason ) {
1389                         $reason = $this->generateReason( $hasHistory );
1390                 }
1391
1392                 // If the page has a history, insert a warning
1393                 if ( $hasHistory && !$confirm ) {
1394                         global $wgLang;
1395
1396                         $revisions = $this->mPage->estimateRevisionCount();
1397                         // @todo FIXME: i18n issue/patchwork message
1398                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1399                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1400                                 wfMsgHtml( 'word-separator' ) . Linker::link( $this->getTitle(),
1401                                         wfMsgHtml( 'history' ),
1402                                         array( 'rel' => 'archives' ),
1403                                         array( 'action' => 'history' ) ) .
1404                                 '</strong>'
1405                         );
1406
1407                         if ( $bigHistory ) {
1408                                 global $wgDeleteRevisionsLimit;
1409                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1410                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1411                         }
1412                 }
1413
1414                 return $this->confirmDelete( $reason );
1415         }
1416
1417         /**
1418          * Output deletion confirmation dialog
1419          * @todo FIXME: Move to another file?
1420          * @param $reason String: prefilled reason
1421          */
1422         public function confirmDelete( $reason ) {
1423                 global $wgOut;
1424
1425                 wfDebug( "Article::confirmDelete\n" );
1426
1427                 $deleteBackLink = Linker::linkKnown( $this->getTitle() );
1428                 $wgOut->setSubtitle( wfMsgHtml( 'delete-backlink', $deleteBackLink ) );
1429                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1430                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1431
1432                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1433
1434                 if ( $this->getContext()->getUser()->isAllowed( 'suppressrevision' ) ) {
1435                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1436                                         <td></td>
1437                                         <td class='mw-input'><strong>" .
1438                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1439                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1440                                         "</strong></td>
1441                                 </tr>";
1442                 } else {
1443                         $suppress = '';
1444                 }
1445                 $checkWatch = $this->getContext()->getUser()->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1446
1447                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1448                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1449                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1450                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1451                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1452                         "<tr id=\"wpDeleteReasonListRow\">
1453                                 <td class='mw-label'>" .
1454                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1455                                 "</td>
1456                                 <td class='mw-input'>" .
1457                                         Xml::listDropDown( 'wpDeleteReasonList',
1458                                                 wfMsgForContent( 'deletereason-dropdown' ),
1459                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1460                                 "</td>
1461                         </tr>
1462                         <tr id=\"wpDeleteReasonRow\">
1463                                 <td class='mw-label'>" .
1464                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1465                                 "</td>
1466                                 <td class='mw-input'>" .
1467                                 Html::input( 'wpReason', $reason, 'text', array(
1468                                         'size' => '60',
1469                                         'maxlength' => '255',
1470                                         'tabindex' => '2',
1471                                         'id' => 'wpReason',
1472                                         'autofocus'
1473                                 ) ) .
1474                                 "</td>
1475                         </tr>";
1476
1477                 # Disallow watching if user is not logged in
1478                 if ( $this->getContext()->getUser()->isLoggedIn() ) {
1479                         $form .= "
1480                         <tr>
1481                                 <td></td>
1482                                 <td class='mw-input'>" .
1483                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1484                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1485                                 "</td>
1486                         </tr>";
1487                 }
1488
1489                 $form .= "
1490                         $suppress
1491                         <tr>
1492                                 <td></td>
1493                                 <td class='mw-submit'>" .
1494                                         Xml::submitButton( wfMsg( 'deletepage' ),
1495                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1496                                 "</td>
1497                         </tr>" .
1498                         Xml::closeElement( 'table' ) .
1499                         Xml::closeElement( 'fieldset' ) .
1500                         Html::hidden( 'wpEditToken', $this->getContext()->getUser()->editToken() ) .
1501                         Xml::closeElement( 'form' );
1502
1503                         if ( $this->getContext()->getUser()->isAllowed( 'editinterface' ) ) {
1504                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1505                                 $link = Linker::link(
1506                                         $title,
1507                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1508                                         array(),
1509                                         array( 'action' => 'edit' )
1510                                 );
1511                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1512                         }
1513
1514                 $wgOut->addHTML( $form );
1515                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1516                 LogEventsList::showLogExtract( $wgOut, 'delete',
1517                         $this->getTitle()->getPrefixedText()
1518                 );
1519         }
1520
1521         /**
1522          * Perform a deletion and output success or failure messages
1523          */
1524         public function doDelete( $reason, $suppress = false ) {
1525                 global $wgOut;
1526
1527                 $id = $this->getTitle()->getArticleID( Title::GAID_FOR_UPDATE );
1528
1529                 $error = '';
1530                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, $id, $error ) ) {
1531                         $deleted = $this->getTitle()->getPrefixedText();
1532
1533                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1534                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1535
1536                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1537
1538                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1539                         $wgOut->returnToMain( false );
1540                 } else {
1541                         if ( $error == '' ) {
1542                                 $wgOut->showFatalError(
1543                                         Html::rawElement(
1544                                                 'div',
1545                                                 array( 'class' => 'error mw-error-cannotdelete' ),
1546                                                 wfMsgExt( 'cannotdelete', array( 'parse' ),
1547                                                         wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1548                                         )
1549                                 );
1550
1551                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1552
1553                                 LogEventsList::showLogExtract(
1554                                         $wgOut,
1555                                         'delete',
1556                                         $this->getTitle()->getPrefixedText()
1557                                 );
1558                         } else {
1559                                 $wgOut->showFatalError( $error );
1560                         }
1561                 }
1562         }
1563
1564         /**
1565          * Generate the navigation links when browsing through an article revisions
1566          * It shows the information as:
1567          *   Revision as of \<date\>; view current revision
1568          *   \<- Previous version | Next Version -\>
1569          *
1570          * @param $oldid String: revision ID of this article revision
1571          */
1572         public function setOldSubtitle( $oldid = 0 ) {
1573                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1574
1575                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1576                         return;
1577                 }
1578
1579                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1580
1581                 # Cascade unhide param in links for easy deletion browsing
1582                 $extraParams = array();
1583                 if ( $wgRequest->getVal( 'unhide' ) ) {
1584                         $extraParams['unhide'] = 1;
1585                 }
1586
1587                 $revision = Revision::newFromId( $oldid );
1588                 $timestamp = $revision->getTimestamp();
1589
1590                 $current = ( $oldid == $this->mPage->getLatest() );
1591                 $td = $wgLang->timeanddate( $timestamp, true );
1592                 $tddate = $wgLang->date( $timestamp, true );
1593                 $tdtime = $wgLang->time( $timestamp, true );
1594
1595                 $lnk = $current
1596                         ? wfMsgHtml( 'currentrevisionlink' )
1597                         : Linker::link(
1598                                 $this->getTitle(),
1599                                 wfMsgHtml( 'currentrevisionlink' ),
1600                                 array(),
1601                                 $extraParams,
1602                                 array( 'known', 'noclasses' )
1603                         );
1604                 $curdiff = $current
1605                         ? wfMsgHtml( 'diff' )
1606                         : Linker::link(
1607                                 $this->getTitle(),
1608                                 wfMsgHtml( 'diff' ),
1609                                 array(),
1610                                 array(
1611                                         'diff' => 'cur',
1612                                         'oldid' => $oldid
1613                                 ) + $extraParams,
1614                                 array( 'known', 'noclasses' )
1615                         );
1616                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1617                 $prevlink = $prev
1618                         ? Linker::link(
1619                                 $this->getTitle(),
1620                                 wfMsgHtml( 'previousrevision' ),
1621                                 array(),
1622                                 array(
1623                                         'direction' => 'prev',
1624                                         'oldid' => $oldid
1625                                 ) + $extraParams,
1626                                 array( 'known', 'noclasses' )
1627                         )
1628                         : wfMsgHtml( 'previousrevision' );
1629                 $prevdiff = $prev
1630                         ? Linker::link(
1631                                 $this->getTitle(),
1632                                 wfMsgHtml( 'diff' ),
1633                                 array(),
1634                                 array(
1635                                         'diff' => 'prev',
1636                                         'oldid' => $oldid
1637                                 ) + $extraParams,
1638                                 array( 'known', 'noclasses' )
1639                         )
1640                         : wfMsgHtml( 'diff' );
1641                 $nextlink = $current
1642                         ? wfMsgHtml( 'nextrevision' )
1643                         : Linker::link(
1644                                 $this->getTitle(),
1645                                 wfMsgHtml( 'nextrevision' ),
1646                                 array(),
1647                                 array(
1648                                         'direction' => 'next',
1649                                         'oldid' => $oldid
1650                                 ) + $extraParams,
1651                                 array( 'known', 'noclasses' )
1652                         );
1653                 $nextdiff = $current
1654                         ? wfMsgHtml( 'diff' )
1655                         : Linker::link(
1656                                 $this->getTitle(),
1657                                 wfMsgHtml( 'diff' ),
1658                                 array(),
1659                                 array(
1660                                         'diff' => 'next',
1661                                         'oldid' => $oldid
1662                                 ) + $extraParams,
1663                                 array( 'known', 'noclasses' )
1664                         );
1665
1666                 $cdel = '';
1667
1668                 // User can delete revisions or view deleted revisions...
1669                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1670                 if ( $canHide || ( $revision->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
1671                         if ( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
1672                                 $cdel = Linker::revDeleteLinkDisabled( $canHide ); // rev was hidden from Sysops
1673                         } else {
1674                                 $query = array(
1675                                         'type'   => 'revision',
1676                                         'target' => $this->getTitle()->getPrefixedDbkey(),
1677                                         'ids'    => $oldid
1678                                 );
1679                                 $cdel = Linker::revDeleteLink( $query, $revision->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1680                         }
1681                         $cdel .= ' ';
1682                 }
1683
1684                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1685                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1686
1687                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1688                         ? 'revision-info-current'
1689                         : 'revision-info';
1690
1691                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" .
1692                         wfMsgExt(
1693                                 $infomsg,
1694                                 array( 'parseinline', 'replaceafter' ),
1695                                 $td,
1696                                 $userlinks,
1697                                 $revision->getID(),
1698                                 $tddate,
1699                                 $tdtime,
1700                                 $revision->getUser()
1701                         ) .
1702                         "</div>\n" .
1703                         "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1704                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
1705
1706                 $wgOut->setSubtitle( $r );
1707         }
1708
1709         /* Caching functions */
1710
1711         /**
1712          * checkLastModified returns true if it has taken care of all
1713          * output to the client that is necessary for this request.
1714          * (that is, it has sent a cached version of the page)
1715          *
1716          * @return boolean true if cached version send, false otherwise
1717          */
1718         protected function tryFileCache() {
1719                 static $called = false;
1720
1721                 if ( $called ) {
1722                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1723                         return false;
1724                 }
1725
1726                 $called = true;
1727                 if ( $this->isFileCacheable() ) {
1728                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1729                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1730                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1731                                 $cache->loadFromFileCache( $this->getContext() );
1732                                 return true;
1733                         } else {
1734                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1735                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1736                         }
1737                 } else {
1738                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1739                 }
1740
1741                 return false;
1742         }
1743
1744         /**
1745          * Check if the page can be cached
1746          * @return bool
1747          */
1748         public function isFileCacheable() {
1749                 $cacheable = false;
1750
1751                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1752                         $cacheable = $this->mPage->getID()
1753                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1754                         // Extension may have reason to disable file caching on some pages.
1755                         if ( $cacheable ) {
1756                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1757                         }
1758                 }
1759
1760                 return $cacheable;
1761         }
1762
1763         /**#@-*/
1764
1765         /**
1766          * Add the primary page-view wikitext to the output buffer
1767          * Saves the text into the parser cache if possible.
1768          * Updates templatelinks if it is out of date.
1769          *
1770          * @param $text String
1771          * @param $cache Boolean
1772          * @param $parserOptions mixed ParserOptions object, or boolean false
1773          */
1774         public function outputWikiText( $text, $cache = true, $parserOptions = false ) {
1775                 global $wgOut;
1776
1777                 $this->mParserOutput = $this->getOutputFromWikitext( $text, $cache, $parserOptions );
1778
1779                 $this->doCascadeProtectionUpdates( $this->mParserOutput );
1780
1781                 $wgOut->addParserOutput( $this->mParserOutput );
1782         }
1783
1784         /**
1785          * Lightweight method to get the parser output for a page, checking the parser cache
1786          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1787          * consider, so it's not appropriate to use there.
1788          *
1789          * @since 1.16 (r52326) for LiquidThreads
1790          *
1791          * @param $oldid mixed integer Revision ID or null
1792          * @param $user User The relevant user
1793          * @return ParserOutput or false if the given revsion ID is not found
1794          */
1795         public function getParserOutput( $oldid = null, User $user = null ) {
1796                 global $wgEnableParserCache, $wgUser;
1797                 $user = is_null( $user ) ? $wgUser : $user;
1798
1799                 wfProfileIn( __METHOD__ );
1800                 // Should the parser cache be used?
1801                 $useParserCache = $wgEnableParserCache &&
1802                         $user->getStubThreshold() == 0 &&
1803                         $this->mPage->exists() &&
1804                         $oldid === null;
1805
1806                 wfDebug( __METHOD__ . ': using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
1807
1808                 if ( $user->getStubThreshold() ) {
1809                         wfIncrStats( 'pcache_miss_stub' );
1810                 }
1811
1812                 if ( $useParserCache ) {
1813                         $options = $this->mPage->makeParserOptions( $user );
1814                         $parserOutput = ParserCache::singleton()->get( $this, $options );
1815                         if ( $parserOutput !== false ) {
1816                                 wfProfileOut( __METHOD__ );
1817                                 return $parserOutput;
1818                         }
1819                 }
1820
1821                 // Cache miss; parse and output it.
1822                 if ( $oldid === null ) {
1823                         $text = $this->mPage->getRawText();
1824                 } else {
1825                         $rev = Revision::newFromTitle( $this->getTitle(), $oldid );
1826                         if ( $rev === null ) {
1827                                 wfProfileOut( __METHOD__ );
1828                                 return false;
1829                         }
1830                         $text = $rev->getText();
1831                 }
1832
1833                 $output = $this->getOutputFromWikitext( $text, $useParserCache );
1834                 wfProfileOut( __METHOD__ );
1835                 return $output;
1836         }
1837
1838         /**
1839          * This does all the heavy lifting for outputWikitext, except it returns the parser
1840          * output instead of sending it straight to $wgOut. Makes things nice and simple for,
1841          * say, embedding thread pages within a discussion system (LiquidThreads)
1842          *
1843          * @param $text string
1844          * @param $cache boolean
1845          * @param $parserOptions parsing options, defaults to false
1846          * @return ParserOutput
1847          */
1848         public function getOutputFromWikitext( $text, $cache = true, $parserOptions = false ) {
1849                 global $wgParser, $wgEnableParserCache, $wgUseFileCache;
1850
1851                 if ( !$parserOptions ) {
1852                         $parserOptions = $this->getParserOptions();
1853                 }
1854
1855                 $time = - wfTime();
1856                 $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(),
1857                         $parserOptions, true, true, $this->getRevIdFetched() );
1858                 $time += wfTime();
1859
1860                 # Timing hack
1861                 if ( $time > 3 ) {
1862                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
1863                                 $this->getTitle()->getPrefixedDBkey() ) );
1864                 }
1865
1866                 if ( $wgEnableParserCache && $cache && $this->mParserOutput->isCacheable() ) {
1867                         $parserCache = ParserCache::singleton();
1868                         $parserCache->save( $this->mParserOutput, $this, $parserOptions );
1869                 }
1870
1871                 // Make sure file cache is not used on uncacheable content.
1872                 // Output that has magic words in it can still use the parser cache
1873                 // (if enabled), though it will generally expire sooner.
1874                 if ( !$this->mParserOutput->isCacheable() || $this->mParserOutput->containsOldMagic() ) {
1875                         $wgUseFileCache = false;
1876                 }
1877
1878                 if ( $this->isCurrent() ) {
1879                         $this->mPage->doCascadeProtectionUpdates( $this->mParserOutput );
1880                 }
1881
1882                 return $this->mParserOutput;
1883         }
1884
1885         /**
1886          * Get parser options suitable for rendering the primary article wikitext
1887          * @return mixed ParserOptions object or boolean false
1888          */
1889         public function getParserOptions() {
1890                 global $wgUser;
1891                 if ( !$this->mParserOptions ) {
1892                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1893                 }
1894                 // Clone to allow modifications of the return value without affecting cache
1895                 return clone $this->mParserOptions;
1896         }
1897
1898         /**
1899          * Sets the context this Article is executed in
1900          *
1901          * @param $context IContextSource
1902          * @since 1.18
1903          */
1904         public function setContext( $context ) {
1905                 $this->mContext = $context;
1906         }
1907
1908         /**
1909          * Gets the context this Article is executed in
1910          *
1911          * @return IContextSource
1912          * @since 1.18
1913          */
1914         public function getContext() {
1915                 if ( $this->mContext instanceof IContextSource ) {
1916                         return $this->mContext;
1917                 } else {
1918                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1919                         return RequestContext::getMain();
1920                 }
1921         }
1922
1923         /**
1924          * Use PHP's magic __get handler to handle accessing of
1925          * raw WikiPage fields for backwards compatibility.
1926          *
1927          * @param $fname String Field name
1928          */
1929         public function __get( $fname ) {
1930                 if ( property_exists( $this->mPage, $fname ) ) {
1931                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1932                         return $this->mPage->$fname;
1933                 }
1934                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1935         }
1936
1937         /**
1938          * Use PHP's magic __set handler to handle setting of
1939          * raw WikiPage fields for backwards compatibility.
1940          *
1941          * @param $fname String Field name
1942          * @param $fvalue mixed New value
1943          */
1944         public function __set( $fname, $fvalue ) {
1945                 if ( property_exists( $this->mPage, $fname ) ) {
1946                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1947                         $this->mPage->$fname = $fvalue;
1948                 // Note: extensions may want to toss on new fields
1949                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1950                         $this->mPage->$fname = $fvalue;
1951                 } else {
1952                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1953                 }
1954         }
1955
1956         /**
1957          * Use PHP's magic __call handler to transform instance calls to
1958          * WikiPage functions for backwards compatibility.
1959          *
1960          * @param $fname String Name of called method
1961          * @param $args Array Arguments to the method
1962          */
1963         public function __call( $fname, $args ) {
1964                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1965                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1966                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1967                 }
1968                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1969         }
1970
1971         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1972         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1973                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1974         }
1975
1976         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1977                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1978         }
1979
1980         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
1981                 global $wgUser;
1982                 $user = is_null( $user ) ? $wgUser : $user;
1983                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
1984         }
1985
1986         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
1987                 global $wgUser;
1988                 $guser = is_null( $guser ) ? $wgUser : $guser;
1989                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
1990         }
1991
1992         public function generateReason( &$hasHistory ) {
1993                 return $this->mPage->getAutoDeleteReason( $hasHistory );
1994         }
1995
1996         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
1997         public static function selectFields() {
1998                 return WikiPage::selectFields();
1999         }
2000
2001         public static function onArticleCreate( $title ) {
2002                 return WikiPage::onArticleCreate( $title );
2003         }
2004
2005         public static function onArticleDelete( $title ) {
2006                 return WikiPage::onArticleDelete( $title );
2007         }
2008
2009         public static function onArticleEdit( $title ) {
2010                 return WikiPage::onArticleEdit( $title );
2011         }
2012
2013         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2014                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2015         }
2016         // ******
2017 }
2018
2019 class PoolWorkArticleView extends PoolCounterWork {
2020
2021         /**
2022          * @var Article
2023          */
2024         private $mArticle;
2025
2026         function __construct( $article, $key, $useParserCache, $parserOptions ) {
2027                 parent::__construct( 'ArticleView', $key );
2028                 $this->mArticle = $article;
2029                 $this->cacheable = $useParserCache;
2030                 $this->parserOptions = $parserOptions;
2031         }
2032
2033         function doWork() {
2034                 return $this->mArticle->doViewParse();
2035         }
2036
2037         function getCachedWork() {
2038                 global $wgOut;
2039
2040                 $parserCache = ParserCache::singleton();
2041                 $this->mArticle->mParserOutput = $parserCache->get( $this->mArticle, $this->parserOptions );
2042
2043                 if ( $this->mArticle->mParserOutput !== false ) {
2044                         wfDebug( __METHOD__ . ": showing contents parsed by someone else\n" );
2045                         $wgOut->addParserOutput( $this->mArticle->mParserOutput );
2046                         # Ensure that UI elements requiring revision ID have
2047                         # the correct version information.
2048                         $wgOut->setRevisionId( $this->mArticle->getLatest() );
2049                         return true;
2050                 }
2051                 return false;
2052         }
2053
2054         function fallback() {
2055                 return $this->mArticle->tryDirtyCache();
2056         }
2057
2058         /**
2059          * @param $status Status
2060          */
2061         function error( $status ) {
2062                 global $wgOut;
2063
2064                 $wgOut->clearHTML(); // for release() errors
2065                 $wgOut->enableClientCache( false );
2066                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2067
2068                 $errortext = $status->getWikiText( false, 'view-pool-error' );
2069                 $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
2070
2071                 return false;
2072         }
2073 }