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          * @private
 149          */
 150         public function clear() {
 151                 $this->mContentLoaded = false;
 152
 153                 $this->mRedirectedFrom = null; # Title object if set
 154                 $this->mRevIdFetched = 0;
 155                 $this->mRedirectUrl = false;
 156
 157                 $this->mPage->clear();
 158         }
 159
 160         /**
 161          * Note that getContent/loadContent do not follow redirects anymore.
 162          * If you need to fetch redirectable content easily, try
 163          * the shortcut in Article::followRedirect()
 164          *
 165          * This function has side effects! Do not use this function if you
 166          * only want the real revision text if any.
 167          *
 168          * @return Return the text of this revision
 169          */
 170         public function getContent() {
 171                 global $wgUser;
 172
 173                 wfProfileIn( __METHOD__ );
 174
 175                 if ( $this->mPage->getID() === 0 ) {
 176                         # If this is a MediaWiki:x message, then load the messages
 177                         # and return the message value for x.
 178                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 179                                 $text = $this->getTitle()->getDefaultMessageText();
 180                                 if ( $text === false ) {
 181                                         $text = '';
 182                                 }
 183                         } else {
 184                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 185                         }
 186                         wfProfileOut( __METHOD__ );
 187
 188                         return $text;
 189                 } else {
 190                         $this->loadContent();
 191                         wfProfileOut( __METHOD__ );
 192
 193                         return $this->mContent;
 194                 }
 195         }
 196
 197         /**
 198          * @return int The oldid of the article that is to be shown, 0 for the
 199          *             current revision
 200          */
 201         public function getOldID() {
 202                 if ( is_null( $this->mOldId ) ) {
 203                         $this->mOldId = $this->getOldIDFromRequest();
 204                 }
 205
 206                 return $this->mOldId;
 207         }
 208
 209         /**
 210          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 211          *
 212          * @return int The old id for the request
 213          */
 214         public function getOldIDFromRequest() {
 215                 global $wgRequest;
 216
 217                 $this->mRedirectUrl = false;
 218
 219                 $oldid = $wgRequest->getVal( 'oldid' );
 220
 221                 if ( isset( $oldid ) ) {
 222                         $oldid = intval( $oldid );
 223                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 224                                 $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 225                                 if ( $nextid ) {
 226                                         $oldid = $nextid;
 227                                 } else {
 228                                         $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 229                                 }
 230                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 231                                 $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 232                                 if ( $previd ) {
 233                                         $oldid = $previd;
 234                                 }
 235                         }
 236                 }
 237
 238                 if ( !$oldid ) {
 239                         $oldid = 0;
 240                 }
 241
 242                 return $oldid;
 243         }
 244
 245         /**
 246          * Load the revision (including text) into this object
 247          */
 248         function loadContent() {
 249                 if ( $this->mContentLoaded ) {
 250                         return;
 251                 }
 252
 253                 wfProfileIn( __METHOD__ );
 254
 255                 $this->fetchContent( $this->getOldID() );
 256
 257                 wfProfileOut( __METHOD__ );
 258         }
 259
 260         /**
 261          * Get text of an article from database
 262          * Does *NOT* follow redirects.
 263          *
 264          * @param $oldid Int: 0 for whatever the latest revision is
 265          * @return mixed string containing article contents, or false if null
 266          */
 267         function fetchContent( $oldid = 0 ) {
 268                 if ( $this->mContentLoaded ) {
 269                         return $this->mContent;
 270                 }
 271
 272                 # Pre-fill content with error message so that if something
 273                 # fails we'll have something telling us what we intended.
 274                 $t = $this->getTitle()->getPrefixedText();
 275                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 276                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 277
 278                 if ( $oldid ) {
 279                         $revision = Revision::newFromId( $oldid );
 280                         if ( !$revision ) {
 281                                 wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 282                                 return false;
 283                         }
 284                         // Revision title doesn't match the page title given?
 285                         if ( $this->mPage->getID() != $revision->getPage() ) {
 286                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 287                                 $this->mPage = call_user_func( $function, $revision->getPage() );
 288                                 if ( !$this->mPage->getId() ) {
 289                                         wfDebug( __METHOD__ . " failed to get page data linked to revision id $oldid\n" );
 290                                         return false;
 291                                 }
 292                         }
 293                 } else {
 294                         if ( !$this->mPage->getLatest() ) {
 295                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 296                                 return false;
 297                         }
 298
 299                         $revision = $this->mPage->getRevision();
 300                         if ( !$revision ) {
 301                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 302                                 return false;
 303                         }
 304                 }
 305
 306                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 307                 // We should instead work with the Revision object when we need it...
 308                 $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 309
 310                 $this->mRevIdFetched = $revision->getId();
 311                 $this->mContentLoaded = true;
 312                 $this->mRevision =& $revision;
 313
 314                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 315
 316                 return $this->mContent;
 317         }
 318
 319         /**
 320          * No-op
 321          * @deprecated since 1.18
 322          */
 323         public function forUpdate() {
 324                 wfDeprecated( __METHOD__ );
 325         }
 326
 327         /**
 328          * Returns true if the currently-referenced revision is the current edit
 329          * to this page (and it exists).
 330          * @return bool
 331          */
 332         public function isCurrent() {
 333                 # If no oldid, this is the current version.
 334                 if ( $this->getOldID() == 0 ) {
 335                         return true;
 336                 }
 337
 338                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 339         }
 340
 341         /**
 342          * Use this to fetch the rev ID used on page views
 343          *
 344          * @return int revision ID of last article revision
 345          */
 346         public function getRevIdFetched() {
 347                 if ( $this->mRevIdFetched ) {
 348                         return $this->mRevIdFetched;
 349                 } else {
 350                         return $this->mPage->getLatest();
 351                 }
 352         }
 353
 354         /**
 355          * This is the default action of the index.php entry point: just view the
 356          * page of the given title.
 357          */
 358         public function view() {
 359                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 360                 global $wgUseFileCache, $wgUseETag;
 361
 362                 wfProfileIn( __METHOD__ );
 363
 364                 # Get variables from query string
 365                 $oldid = $this->getOldID();
 366
 367                 # getOldID may want us to redirect somewhere else
 368                 if ( $this->mRedirectUrl ) {
 369                         $wgOut->redirect( $this->mRedirectUrl );
 370                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 371                         wfProfileOut( __METHOD__ );
 372
 373                         return;
 374                 }
 375
 376                 # Set page title (may be overridden by DISPLAYTITLE)
 377                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 378
 379                 # If we got diff in the query, we want to see a diff page instead of the article.
 380                 if ( $wgRequest->getCheck( 'diff' ) ) {
 381                         wfDebug( __METHOD__ . ": showing diff page\n" );
 382                         $this->showDiffPage();
 383                         wfProfileOut( __METHOD__ );
 384
 385                         return;
 386                 }
 387
 388                 $wgOut->setArticleFlag( true );
 389                 # Allow frames by default
 390                 $wgOut->allowClickjacking();
 391
 392                 $parserCache = ParserCache::singleton();
 393
 394                 $parserOptions = $this->getParserOptions();
 395                 # Render printable version, use printable version cache
 396                 if ( $wgOut->isPrintable() ) {
 397                         $parserOptions->setIsPrintable( true );
 398                         $parserOptions->setEditSection( false );
 399                 } elseif ( $wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 400                         $parserOptions->setEditSection( false );
 401                 }
 402
 403                 # Try client and file cache
 404                 if ( $oldid === 0 && $this->mPage->checkTouched() ) {
 405                         if ( $wgUseETag ) {
 406                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 407                         }
 408
 409                         # Is it client cached?
 410                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 411                                 wfDebug( __METHOD__ . ": done 304\n" );
 412                                 wfProfileOut( __METHOD__ );
 413
 414                                 return;
 415                         # Try file cache
 416                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 417                                 wfDebug( __METHOD__ . ": done file cache\n" );
 418                                 # tell wgOut that output is taken care of
 419                                 $wgOut->disable();
 420                                 $this->mPage->viewUpdates();
 421                                 wfProfileOut( __METHOD__ );
 422
 423                                 return;
 424                         }
 425                 }
 426
 427                 if ( !$wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 428                         $parserOptions->setEditSection( false );
 429                 }
 430
 431                 # Should the parser cache be used?
 432                 $useParserCache = $this->useParserCache( $oldid );
 433                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 434                 if ( $wgUser->getStubThreshold() ) {
 435                         wfIncrStats( 'pcache_miss_stub' );
 436                 }
 437
 438                 $wasRedirected = $this->showRedirectedFromHeader();
 439                 $this->showNamespaceHeader();
 440
 441                 # Iterate through the possible ways of constructing the output text.
 442                 # Keep going until $outputDone is set, or we run out of things to do.
 443                 $pass = 0;
 444                 $outputDone = false;
 445                 $this->mParserOutput = false;
 446
 447                 while ( !$outputDone && ++$pass ) {
 448                         switch( $pass ) {
 449                                 case 1:
 450                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 451                                         break;
 452                                 case 2:
 453                                         # Try the parser cache
 454                                         if ( $useParserCache ) {
 455                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 456
 457                                                 if ( $this->mParserOutput !== false ) {
 458                                                         wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 459                                                         $wgOut->addParserOutput( $this->mParserOutput );
 460                                                         # Ensure that UI elements requiring revision ID have
 461                                                         # the correct version information.
 462                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 463                                                         $outputDone = true;
 464                                                         # Preload timestamp to avoid a DB hit
 465                                                         if ( isset( $this->mParserOutput->mTimestamp ) ) {
 466                                                                 $this->mPage->setTimestamp( $this->mParserOutput->mTimestamp );
 467                                                         }
 468                                                 }
 469                                         }
 470                                         break;
 471                                 case 3:
 472                                         $text = $this->getContent();
 473                                         if ( $text === false || $this->mPage->getID() == 0 ) {
 474                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 475                                                 $this->showMissingArticle();
 476                                                 wfProfileOut( __METHOD__ );
 477                                                 return;
 478                                         }
 479
 480                                         # Another whitelist check in case oldid is altering the title
 481                                         if ( !$this->getTitle()->userCanRead() ) {
 482                                                 wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 483                                                 $wgOut->loginToUse();
 484                                                 $wgOut->output();
 485                                                 $wgOut->disable();
 486                                                 wfProfileOut( __METHOD__ );
 487                                                 return;
 488                                         }
 489
 490                                         # Are we looking at an old revision
 491                                         if ( $oldid && !is_null( $this->mRevision ) ) {
 492                                                 $this->setOldSubtitle( $oldid );
 493
 494                                                 if ( !$this->showDeletedRevisionHeader() ) {
 495                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 496                                                         wfProfileOut( __METHOD__ );
 497                                                         return;
 498                                                 }
 499
 500                                                 # If this "old" version is the current, then try the parser cache...
 501                                                 if ( $oldid === $this->mPage->getLatest() && $this->useParserCache( false ) ) {
 502                                                         $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 503                                                         if ( $this->mParserOutput ) {
 504                                                                 wfDebug( __METHOD__ . ": showing parser cache for current rev permalink\n" );
 505                                                                 $wgOut->addParserOutput( $this->mParserOutput );
 506                                                                 $wgOut->setRevisionId( $this->mPage->getLatest() );
 507                                                                 $outputDone = true;
 508                                                                 break;
 509                                                         }
 510                                                 }
 511                                         }
 512
 513                                         # Ensure that UI elements requiring revision ID have
 514                                         # the correct version information.
 515                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 516
 517                                         # Pages containing custom CSS or JavaScript get special treatment
 518                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 519                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 520                                                 $this->showCssOrJsPage();
 521                                                 $outputDone = true;
 522                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 523                                                 # Allow extensions do their own custom view for certain pages
 524                                                 $outputDone = true;
 525                                         } else {
 526                                                 $rt = Title::newFromRedirectArray( $text );
 527                                                 if ( $rt ) {
 528                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 529                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 530                                                         # Don't append the subtitle if this was an old revision
 531                                                         $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
 532                                                         # Parse just to get categories, displaytitle, etc.
 533                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 534                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 535                                                         $outputDone = true;
 536                                                 }
 537                                         }
 538                                         break;
 539                                 case 4:
 540                                         # Run the parse, protected by a pool counter
 541                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 542
 543                                         $key = $parserCache->getKey( $this, $parserOptions );
 544                                         $poolArticleView = new PoolWorkArticleView( $this, $key, $useParserCache, $parserOptions );
 545
 546                                         if ( !$poolArticleView->execute() ) {
 547                                                 # Connection or timeout error
 548                                                 wfProfileOut( __METHOD__ );
 549                                                 return;
 550                                         } else {
 551                                                 $outputDone = true;
 552                                         }
 553                                         break;
 554                                 # Should be unreachable, but just in case...
 555                                 default:
 556                                         break 2;
 557                         }
 558                 }
 559
 560                 # Get the ParserOutput actually *displayed* here.
 561                 # Note that $this->mParserOutput is the *current* version output.
 562                 $pOutput = ( $outputDone instanceof ParserOutput )
 563                         ? $outputDone // object fetched by hook
 564                         : $this->mParserOutput;
 565
 566                 # Adjust title for main page & pages with displaytitle
 567                 if ( $pOutput ) {
 568                         $this->adjustDisplayTitle( $pOutput );
 569                 }
 570
 571                 # For the main page, overwrite the <title> element with the con-
 572                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 573                 # that's not empty).
 574                 # This message always exists because it is in the i18n files
 575                 if ( $this->getTitle()->isMainPage() ) {
 576                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 577                         if ( !$msg->isDisabled() ) {
 578                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 579                         }
 580                 }
 581
 582                 # Check for any __NOINDEX__ tags on the page using $pOutput
 583                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 584                 $wgOut->setIndexPolicy( $policy['index'] );
 585                 $wgOut->setFollowPolicy( $policy['follow'] );
 586
 587                 $this->showViewFooter();
 588                 $this->mPage->viewUpdates();
 589
 590                 wfProfileOut( __METHOD__ );
 591         }
 592
 593         /**
 594          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 595          * @param $pOutput ParserOutput
 596          */
 597         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 598                 global $wgOut;
 599                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 600                 $titleText = $pOutput->getTitleText();
 601                 if ( strval( $titleText ) !== '' ) {
 602                         $wgOut->setPageTitle( $titleText );
 603                 }
 604         }
 605
 606         /**
 607          * Show a diff page according to current request variables. For use within
 608          * Article::view() only, other callers should use the DifferenceEngine class.
 609          */
 610         public function showDiffPage() {
 611                 global $wgRequest, $wgUser;
 612
 613                 $diff = $wgRequest->getVal( 'diff' );
 614                 $rcid = $wgRequest->getVal( 'rcid' );
 615                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 616                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 617                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 618                 $oldid = $this->getOldID();
 619
 620                 $de = new DifferenceEngine( $this->getTitle(), $oldid, $diff, $rcid, $purge, $unhide );
 621                 // DifferenceEngine directly fetched the revision:
 622                 $this->mRevIdFetched = $de->mNewid;
 623                 $de->showDiffPage( $diffOnly );
 624
 625                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 626                         # Run view updates for current revision only
 627                         $this->mPage->viewUpdates();
 628                 }
 629         }
 630
 631         /**
 632          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 633          * Article::view() only.
 634          *
 635          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 636          * page views.
 637          */
 638         protected function showCssOrJsPage() {
 639                 global $wgOut;
 640
 641                 $dir = $this->getContext()->getLang()->getDir();
 642                 $lang = $this->getContext()->getLang()->getCode();
 643
 644                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 645                         'clearyourcache' );
 646
 647                 // Give hooks a chance to customise the output
 648                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 649                         // Wrap the whole lot in a <pre> and don't parse
 650                         $m = array();
 651                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 652                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 653                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 654                         $wgOut->addHTML( "\n</pre>\n" );
 655                 }
 656         }
 657
 658         /**
 659          * Get the robot policy to be used for the current view
 660          * @param $action String the action= GET parameter
 661          * @param $pOutput ParserOutput
 662          * @return Array the policy that should be set
 663          * TODO: actions other than 'view'
 664          */
 665         public function getRobotPolicy( $action, $pOutput ) {
 666                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 667                 global $wgDefaultRobotPolicy, $wgRequest;
 668
 669                 $ns = $this->getTitle()->getNamespace();
 670
 671                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 672                         # Don't index user and user talk pages for blocked users (bug 11443)
 673                         if ( !$this->getTitle()->isSubpage() ) {
 674                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 675                                         return array(
 676                                                 'index'  => 'noindex',
 677                                                 'follow' => 'nofollow'
 678                                         );
 679                                 }
 680                         }
 681                 }
 682
 683                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 684                         # Non-articles (special pages etc), and old revisions
 685                         return array(
 686                                 'index'  => 'noindex',
 687                                 'follow' => 'nofollow'
 688                         );
 689                 } elseif ( $wgOut->isPrintable() ) {
 690                         # Discourage indexing of printable versions, but encourage following
 691                         return array(
 692                                 'index'  => 'noindex',
 693                                 'follow' => 'follow'
 694                         );
 695                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 696                         # For ?curid=x urls, disallow indexing
 697                         return array(
 698                                 'index'  => 'noindex',
 699                                 'follow' => 'follow'
 700                         );
 701                 }
 702
 703                 # Otherwise, construct the policy based on the various config variables.
 704                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 705
 706                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 707                         # Honour customised robot policies for this namespace
 708                         $policy = array_merge(
 709                                 $policy,
 710                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 711                         );
 712                 }
 713                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 714                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 715                         # a final sanity check that we have really got the parser output.
 716                         $policy = array_merge(
 717                                 $policy,
 718                                 array( 'index' => $pOutput->getIndexPolicy() )
 719                         );
 720                 }
 721
 722                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 723                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 724                         $policy = array_merge(
 725                                 $policy,
 726                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 727                         );
 728                 }
 729
 730                 return $policy;
 731         }
 732
 733         /**
 734          * Converts a String robot policy into an associative array, to allow
 735          * merging of several policies using array_merge().
 736          * @param $policy Mixed, returns empty array on null/false/'', transparent
 737          *            to already-converted arrays, converts String.
 738          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 739          */
 740         public static function formatRobotPolicy( $policy ) {
 741                 if ( is_array( $policy ) ) {
 742                         return $policy;
 743                 } elseif ( !$policy ) {
 744                         return array();
 745                 }
 746
 747                 $policy = explode( ',', $policy );
 748                 $policy = array_map( 'trim', $policy );
 749
 750                 $arr = array();
 751                 foreach ( $policy as $var ) {
 752                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 753                                 $arr['index'] = $var;
 754                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 755                                 $arr['follow'] = $var;
 756                         }
 757                 }
 758
 759                 return $arr;
 760         }
 761
 762         /**
 763          * If this request is a redirect view, send "redirected from" subtitle to
 764          * $wgOut. Returns true if the header was needed, false if this is not a
 765          * redirect view. Handles both local and remote redirects.
 766          *
 767          * @return boolean
 768          */
 769         public function showRedirectedFromHeader() {
 770                 global $wgOut, $wgRequest, $wgRedirectSources;
 771
 772                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 773
 774                 if ( isset( $this->mRedirectedFrom ) ) {
 775                         // This is an internally redirected page view.
 776                         // We'll need a backlink to the source page for navigation.
 777                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 778                                 $redir = Linker::link(
 779                                         $this->mRedirectedFrom,
 780                                         null,
 781                                         array(),
 782                                         array( 'redirect' => 'no' ),
 783                                         array( 'known', 'noclasses' )
 784                                 );
 785
 786                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 787                                 $wgOut->setSubtitle( $s );
 788
 789                                 // Set the fragment if one was specified in the redirect
 790                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 791                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 792                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 793                                 }
 794
 795                                 // Add a <link rel="canonical"> tag
 796                                 $wgOut->addLink( array( 'rel' => 'canonical',
 797                                         'href' => $this->getTitle()->getLocalURL() )
 798                                 );
 799
 800                                 return true;
 801                         }
 802                 } elseif ( $rdfrom ) {
 803                         // This is an externally redirected view, from some other wiki.
 804                         // If it was reported from a trusted site, supply a backlink.
 805                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 806                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 807                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 808                                 $wgOut->setSubtitle( $s );
 809
 810                                 return true;
 811                         }
 812                 }
 813
 814                 return false;
 815         }
 816
 817         /**
 818          * Show a header specific to the namespace currently being viewed, like
 819          * [[MediaWiki:Talkpagetext]]. For Article::view().
 820          */
 821         public function showNamespaceHeader() {
 822                 global $wgOut;
 823
 824                 if ( $this->getTitle()->isTalkPage() ) {
 825                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 826                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 827                         }
 828                 }
 829         }
 830
 831         /**
 832          * Show the footer section of an ordinary page view
 833          */
 834         public function showViewFooter() {
 835                 global $wgOut, $wgUseTrackbacks;
 836
 837                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 838                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 839                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 840                 }
 841
 842                 # If we have been passed an &rcid= parameter, we want to give the user a
 843                 # chance to mark this new article as patrolled.
 844                 $this->showPatrolFooter();
 845
 846                 # Trackbacks
 847                 if ( $wgUseTrackbacks ) {
 848                         $this->addTrackbacks();
 849                 }
 850
 851                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 852
 853         }
 854
 855         /**
 856          * If patrol is possible, output a patrol UI box. This is called from the
 857          * footer section of ordinary page views. If patrol is not possible or not
 858          * desired, does nothing.
 859          */
 860         public function showPatrolFooter() {
 861                 global $wgOut, $wgRequest, $wgUser;
 862
 863                 $rcid = $wgRequest->getVal( 'rcid' );
 864
 865                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 866                         return;
 867                 }
 868
 869                 $token = $wgUser->editToken( $rcid );
 870                 $wgOut->preventClickjacking();
 871
 872                 $wgOut->addHTML(
 873                         "<div class='patrollink'>" .
 874                                 wfMsgHtml(
 875                                         'markaspatrolledlink',
 876                                         Linker::link(
 877                                                 $this->getTitle(),
 878                                                 wfMsgHtml( 'markaspatrolledtext' ),
 879                                                 array(),
 880                                                 array(
 881                                                         'action' => 'markpatrolled',
 882                                                         'rcid' => $rcid,
 883                                                         'token' => $token,
 884                                                 ),
 885                                                 array( 'known', 'noclasses' )
 886                                         )
 887                                 ) .
 888                         '</div>'
 889                 );
 890         }
 891
 892         /**
 893          * Show the error text for a missing article. For articles in the MediaWiki
 894          * namespace, show the default message text. To be called from Article::view().
 895          */
 896         public function showMissingArticle() {
 897                 global $wgOut, $wgRequest, $wgUser;
 898
 899                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 900                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 901                         $parts = explode( '/', $this->getTitle()->getText() );
 902                         $rootPart = $parts[0];
 903                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 904                         $ip = User::isIP( $rootPart );
 905
 906                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 907                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
 908                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
 909                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 910                                 LogEventsList::showLogExtract(
 911                                         $wgOut,
 912                                         'block',
 913                                         $user->getUserPage()->getPrefixedText(),
 914                                         '',
 915                                         array(
 916                                                 'lim' => 1,
 917                                                 'showIfEmpty' => false,
 918                                                 'msgKey' => array(
 919                                                         'blocked-notice-logextract',
 920                                                         $user->getName() # Support GENDER in notice
 921                                                 )
 922                                         )
 923                                 );
 924                         }
 925                 }
 926
 927                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
 928
 929                 # Show delete and move logs
 930                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
 931                         array(  'lim' => 10,
 932                                 'conds' => array( "log_action != 'revision'" ),
 933                                 'showIfEmpty' => false,
 934                                 'msgKey' => array( 'moveddeleted-notice' ) )
 935                 );
 936
 937                 # Show error message
 938                 $oldid = $this->getOldID();
 939                 if ( $oldid ) {
 940                         $text = wfMsgNoTrans( 'missing-article',
 941                                 $this->getTitle()->getPrefixedText(),
 942                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
 943                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
 944                         // Use the default message text
 945                         $text = $this->getTitle()->getDefaultMessageText();
 946                 } else {
 947                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
 948                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
 949                         $errors = array_merge( $createErrors, $editErrors );
 950
 951                         if ( !count( $errors ) ) {
 952                                 $text = wfMsgNoTrans( 'noarticletext' );
 953                         } else {
 954                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
 955                         }
 956                 }
 957                 $text = "<div class='noarticletext'>\n$text\n</div>";
 958
 959                 if ( !$this->mPage->hasViewableContent() ) {
 960                         // If there's no backing content, send a 404 Not Found
 961                         // for better machine handling of broken links.
 962                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
 963                 }
 964
 965                 $wgOut->addWikiText( $text );
 966         }
 967
 968         /**
 969          * If the revision requested for view is deleted, check permissions.
 970          * Send either an error message or a warning header to $wgOut.
 971          *
 972          * @return boolean true if the view is allowed, false if not.
 973          */
 974         public function showDeletedRevisionHeader() {
 975                 global $wgOut, $wgRequest;
 976
 977                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 978                         // Not deleted
 979                         return true;
 980                 }
 981
 982                 // If the user is not allowed to see it...
 983                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 984                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 985                                 'rev-deleted-text-permission' );
 986
 987                         return false;
 988                 // If the user needs to confirm that they want to see it...
 989                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
 990                         # Give explanation and add a link to view the revision...
 991                         $oldid = intval( $this->getOldID() );
 992                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
 993                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
 994                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
 995                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 996                                 array( $msg, $link ) );
 997
 998                         return false;
 999                 // We are allowed to see...
1000                 } else {
1001                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1002                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1003                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1004
1005                         return true;
1006                 }
1007         }
1008
1009         /**
1010          * Execute the uncached parse for action=view
1011          */
1012         public function doViewParse() {
1013                 global $wgOut;
1014
1015                 $oldid = $this->getOldID();
1016                 $parserOptions = $this->getParserOptions();
1017
1018                 # Render printable version, use printable version cache
1019                 $parserOptions->setIsPrintable( $wgOut->isPrintable() );
1020
1021                 # Don't show section-edit links on old revisions... this way lies madness.
1022                 if ( !$this->isCurrent() || $wgOut->isPrintable() || !$this->getTitle()->quickUserCan( 'edit' ) ) {
1023                         $parserOptions->setEditSection( false );
1024                 }
1025
1026                 $useParserCache = $this->useParserCache( $oldid );
1027                 $this->outputWikiText( $this->getContent(), $useParserCache, $parserOptions );
1028
1029                 return true;
1030         }
1031
1032         /**
1033          * Try to fetch an expired entry from the parser cache. If it is present,
1034          * output it and return true. If it is not present, output nothing and
1035          * return false. This is used as a callback function for
1036          * PoolCounter::executeProtected().
1037          *
1038          * @return boolean
1039          */
1040         public function tryDirtyCache() {
1041                 global $wgOut;
1042                 $parserCache = ParserCache::singleton();
1043                 $options = $this->getParserOptions();
1044
1045                 if ( $wgOut->isPrintable() ) {
1046                         $options->setIsPrintable( true );
1047                         $options->setEditSection( false );
1048                 }
1049
1050                 $output = $parserCache->getDirty( $this, $options );
1051
1052                 if ( $output ) {
1053                         wfDebug( __METHOD__ . ": sending dirty output\n" );
1054                         wfDebugLog( 'dirty', "dirty output " . $parserCache->getKey( $this, $options ) . "\n" );
1055                         $wgOut->setSquidMaxage( 0 );
1056                         $this->mParserOutput = $output;
1057                         $wgOut->addParserOutput( $output );
1058                         $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
1059
1060                         return true;
1061                 } else {
1062                         wfDebugLog( 'dirty', "dirty missing\n" );
1063                         wfDebug( __METHOD__ . ": no dirty cache\n" );
1064
1065                         return false;
1066                 }
1067         }
1068
1069         /**
1070          * View redirect
1071          *
1072          * @param $target Title|Array of destination(s) to redirect
1073          * @param $appendSubtitle Boolean [optional]
1074          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1075          * @return string containing HMTL with redirect link
1076          */
1077         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1078                 global $wgOut, $wgStylePath;
1079
1080                 if ( !is_array( $target ) ) {
1081                         $target = array( $target );
1082                 }
1083
1084                 $lang = $this->getTitle()->getPageLanguage();
1085                 $imageDir = $lang->getDir();
1086
1087                 if ( $appendSubtitle ) {
1088                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1089                 }
1090
1091                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1092                 $title = array_shift( $target );
1093
1094                 if ( $forceKnown ) {
1095                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1096                 } else {
1097                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1098                 }
1099
1100                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1101                 $alt = $lang->isRTL() ? '←' : '→';
1102                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1103                 foreach ( $target as $rt ) {
1104                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1105                         if ( $forceKnown ) {
1106                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1107                         } else {
1108                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1109                         }
1110                 }
1111
1112                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1113                 return '<div class="redirectMsg">' .
1114                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1115                         '<span class="redirectText">' . $link . '</span></div>';
1116         }
1117
1118         /**
1119          * Builds trackback links for article display if $wgUseTrackbacks is set to true
1120          */
1121         public function addTrackbacks() {
1122                 global $wgOut;
1123
1124                 $dbr = wfGetDB( DB_SLAVE );
1125                 $tbs = $dbr->select( 'trackbacks',
1126                         array( 'tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name' ),
1127                         array( 'tb_page' => $this->mPage->getID() )
1128                 );
1129
1130                 if ( !$dbr->numRows( $tbs ) ) {
1131                         return;
1132                 }
1133
1134                 $wgOut->preventClickjacking();
1135
1136                 $tbtext = "";
1137                 foreach ( $tbs as $o ) {
1138                         $rmvtxt = "";
1139
1140                         if ( $this->getContext()->getUser()->isAllowed( 'trackback' ) ) {
1141                                 $delurl = $this->getTitle()->getFullURL( "action=deletetrackback&tbid=" .
1142                                         $o->tb_id . "&token=" . urlencode( $this->getContext()->getUser()->editToken() ) );
1143                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
1144                         }
1145
1146                         $tbtext .= "\n";
1147                         $tbtext .= wfMsgNoTrans( strlen( $o->tb_ex ) ? 'trackbackexcerpt' : 'trackback',
1148                                         $o->tb_title,
1149                                         $o->tb_url,
1150                                         $o->tb_ex,
1151                                         $o->tb_name,
1152                                         $rmvtxt );
1153                 }
1154
1155                 $wgOut->wrapWikiMsg( "<div id='mw_trackbacks'>\n$1\n</div>\n", array( 'trackbackbox', $tbtext ) );
1156         }
1157
1158         /**
1159          * Removes trackback record for current article from trackbacks table
1160          * @deprecated since 1.18
1161          */
1162         public function deletetrackback() {
1163                 return Action::factory( 'deletetrackback', $this )->show();
1164         }
1165
1166         /**
1167          * Handle action=render
1168          */
1169
1170         public function render() {
1171                 global $wgOut;
1172
1173                 $wgOut->setArticleBodyOnly( true );
1174                 $this->view();
1175         }
1176
1177         /**
1178          * Handle action=purge
1179          */
1180         public function purge() {
1181                 return Action::factory( 'purge', $this )->show();
1182         }
1183
1184         /**
1185          * Mark this particular edit/page as patrolled
1186          * @deprecated since 1.18
1187          */
1188         public function markpatrolled() {
1189                 Action::factory( 'markpatrolled', $this )->show();
1190         }
1191
1192         /**
1193          * User-interface handler for the "watch" action.
1194          * Requires Request to pass a token as of 1.18.
1195          * @deprecated since 1.18
1196          */
1197         public function watch() {
1198                 Action::factory( 'watch', $this )->show();
1199         }
1200
1201         /**
1202          * Add this page to $wgUser's watchlist
1203          *
1204          * This is safe to be called multiple times
1205          *
1206          * @return bool true on successful watch operation
1207          * @deprecated since 1.18
1208          */
1209         public function doWatch() {
1210                 global $wgUser;
1211                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1212         }
1213
1214         /**
1215          * User interface handler for the "unwatch" action.
1216          * Requires Request to pass a token as of 1.18.
1217          * @deprecated since 1.18
1218          */
1219         public function unwatch() {
1220                 Action::factory( 'unwatch', $this )->show();
1221         }
1222
1223         /**
1224          * Stop watching a page
1225          * @return bool true on successful unwatch
1226          * @deprecated since 1.18
1227          */
1228         public function doUnwatch() {
1229                 global $wgUser;
1230                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1231         }
1232
1233         /**
1234          * action=protect handler
1235          */
1236         public function protect() {
1237                 $form = new ProtectionForm( $this );
1238                 $form->execute();
1239         }
1240
1241         /**
1242          * action=unprotect handler (alias)
1243          */
1244         public function unprotect() {
1245                 $this->protect();
1246         }
1247
1248         /**
1249          * Info about this page
1250          * Called for ?action=info when $wgAllowPageInfo is on.
1251          */
1252         public function info() {
1253                 Action::factory( 'info', $this )->show();
1254         }
1255
1256         /**
1257          * Overriden by ImagePage class, only present here to avoid a fatal error
1258          * Called for ?action=revert
1259          */
1260         public function revert() {
1261                 Action::factory( 'revert', $this )->show();
1262         }
1263
1264         /**
1265          * User interface for rollback operations
1266          */
1267         public function rollback() {
1268                 Action::factory( 'rollback', $this )->show();
1269         }
1270
1271         /**
1272          * Output a redirect back to the article.
1273          * This is typically used after an edit.
1274          *
1275          * @deprecated in 1.18; call $wgOut->redirect() directly
1276          * @param $noRedir Boolean: add redirect=no
1277          * @param $sectionAnchor String: section to redirect to, including "#"
1278          * @param $extraQuery String: extra query params
1279          */
1280         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1281                 wfDeprecated( __METHOD__ );
1282                 global $wgOut;
1283
1284                 if ( $noRedir ) {
1285                         $query = 'redirect=no';
1286                         if ( $extraQuery )
1287                                 $query .= "&$extraQuery";
1288                 } else {
1289                         $query = $extraQuery;
1290                 }
1291
1292                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1293         }
1294
1295         /**
1296          * UI entry point for page deletion
1297          */
1298         public function delete() {
1299                 global $wgOut, $wgRequest;
1300
1301                 $confirm = $wgRequest->wasPosted() &&
1302                                 $this->getContext()->getUser()->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1303
1304                 $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1305                 $this->DeleteReason = $wgRequest->getText( 'wpReason' );
1306
1307                 $reason = $this->DeleteReasonList;
1308
1309                 if ( $reason != 'other' && $this->DeleteReason != '' ) {
1310                         // Entry from drop down menu + additional comment
1311                         $reason .= wfMsgForContent( 'colon-separator' ) . $this->DeleteReason;
1312                 } elseif ( $reason == 'other' ) {
1313                         $reason = $this->DeleteReason;
1314                 }
1315
1316                 # Flag to hide all contents of the archived revisions
1317                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $this->getContext()->getUser()->isAllowed( 'suppressrevision' );
1318
1319                 # This code desperately needs to be totally rewritten
1320
1321                 # Read-only check...
1322                 if ( wfReadOnly() ) {
1323                         $wgOut->readOnlyPage();
1324
1325                         return;
1326                 }
1327
1328                 # Check permissions
1329                 $permission_errors = $this->getTitle()->getUserPermissionsErrors( 'delete', $this->getContext()->getUser() );
1330
1331                 if ( count( $permission_errors ) > 0 ) {
1332                         $wgOut->showPermissionsErrorPage( $permission_errors );
1333
1334                         return;
1335                 }
1336
1337                 $wgOut->setPagetitle( wfMsg( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1338
1339                 # Better double-check that it hasn't been deleted yet!
1340                 $dbw = wfGetDB( DB_MASTER );
1341                 $conds = $this->getTitle()->pageCond();
1342                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1343                 if ( $latest === false ) {
1344                         $wgOut->showFatalError(
1345                                 Html::rawElement(
1346                                         'div',
1347                                         array( 'class' => 'error mw-error-cannotdelete' ),
1348                                         wfMsgExt( 'cannotdelete', array( 'parse' ),
1349                                                 wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1350                                 )
1351                         );
1352                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1353                         LogEventsList::showLogExtract(
1354                                 $wgOut,
1355                                 'delete',
1356                                 $this->getTitle()->getPrefixedText()
1357                         );
1358
1359                         return;
1360                 }
1361
1362                 # Hack for big sites
1363                 $bigHistory = $this->mPage->isBigDeletion();
1364                 if ( $bigHistory && !$this->getTitle()->userCan( 'bigdelete' ) ) {
1365                         global $wgLang, $wgDeleteRevisionsLimit;
1366
1367                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1368                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1369
1370                         return;
1371                 }
1372
1373                 if ( $confirm ) {
1374                         $this->doDelete( $reason, $suppress );
1375
1376                         if ( $wgRequest->getCheck( 'wpWatch' ) && $this->getContext()->getUser()->isLoggedIn() ) {
1377                                 $this->doWatch();
1378                         } elseif ( $this->getTitle()->userIsWatching() ) {
1379                                 $this->doUnwatch();
1380                         }
1381
1382                         return;
1383                 }
1384
1385                 // Generate deletion reason
1386                 $hasHistory = false;
1387                 if ( !$reason ) {
1388                         $reason = $this->generateReason( $hasHistory );
1389                 }
1390
1391                 // If the page has a history, insert a warning
1392                 if ( $hasHistory && !$confirm ) {
1393                         global $wgLang;
1394
1395                         $revisions = $this->mPage->estimateRevisionCount();
1396                         // @todo FIXME: i18n issue/patchwork message
1397                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1398                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1399                                 wfMsgHtml( 'word-separator' ) . Linker::link( $this->getTitle(),
1400                                         wfMsgHtml( 'history' ),
1401                                         array( 'rel' => 'archives' ),
1402                                         array( 'action' => 'history' ) ) .
1403                                 '</strong>'
1404                         );
1405
1406                         if ( $bigHistory ) {
1407                                 global $wgDeleteRevisionsLimit;
1408                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1409                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1410                         }
1411                 }
1412
1413                 return $this->confirmDelete( $reason );
1414         }
1415
1416         /**
1417          * Output deletion confirmation dialog
1418          * @todo FIXME: Move to another file?
1419          * @param $reason String: prefilled reason
1420          */
1421         public function confirmDelete( $reason ) {
1422                 global $wgOut;
1423
1424                 wfDebug( "Article::confirmDelete\n" );
1425
1426                 $deleteBackLink = Linker::linkKnown( $this->getTitle() );
1427                 $wgOut->setSubtitle( wfMsgHtml( 'delete-backlink', $deleteBackLink ) );
1428                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1429                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1430
1431                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1432
1433                 if ( $this->getContext()->getUser()->isAllowed( 'suppressrevision' ) ) {
1434                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1435                                         <td></td>
1436                                         <td class='mw-input'><strong>" .
1437                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1438                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1439                                         "</strong></td>
1440                                 </tr>";
1441                 } else {
1442                         $suppress = '';
1443                 }
1444                 $checkWatch = $this->getContext()->getUser()->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1445
1446                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1447                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1448                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1449                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1450                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1451                         "<tr id=\"wpDeleteReasonListRow\">
1452                                 <td class='mw-label'>" .
1453                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1454                                 "</td>
1455                                 <td class='mw-input'>" .
1456                                         Xml::listDropDown( 'wpDeleteReasonList',
1457                                                 wfMsgForContent( 'deletereason-dropdown' ),
1458                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1459                                 "</td>
1460                         </tr>
1461                         <tr id=\"wpDeleteReasonRow\">
1462                                 <td class='mw-label'>" .
1463                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1464                                 "</td>
1465                                 <td class='mw-input'>" .
1466                                 Html::input( 'wpReason', $reason, 'text', array(
1467                                         'size' => '60',
1468                                         'maxlength' => '255',
1469                                         'tabindex' => '2',
1470                                         'id' => 'wpReason',
1471                                         'autofocus'
1472                                 ) ) .
1473                                 "</td>
1474                         </tr>";
1475
1476                 # Disallow watching if user is not logged in
1477                 if ( $this->getContext()->getUser()->isLoggedIn() ) {
1478                         $form .= "
1479                         <tr>
1480                                 <td></td>
1481                                 <td class='mw-input'>" .
1482                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1483                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1484                                 "</td>
1485                         </tr>";
1486                 }
1487
1488                 $form .= "
1489                         $suppress
1490                         <tr>
1491                                 <td></td>
1492                                 <td class='mw-submit'>" .
1493                                         Xml::submitButton( wfMsg( 'deletepage' ),
1494                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1495                                 "</td>
1496                         </tr>" .
1497                         Xml::closeElement( 'table' ) .
1498                         Xml::closeElement( 'fieldset' ) .
1499                         Html::hidden( 'wpEditToken', $this->getContext()->getUser()->editToken() ) .
1500                         Xml::closeElement( 'form' );
1501
1502                         if ( $this->getContext()->getUser()->isAllowed( 'editinterface' ) ) {
1503                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1504                                 $link = Linker::link(
1505                                         $title,
1506                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1507                                         array(),
1508                                         array( 'action' => 'edit' )
1509                                 );
1510                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1511                         }
1512
1513                 $wgOut->addHTML( $form );
1514                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1515                 LogEventsList::showLogExtract( $wgOut, 'delete',
1516                         $this->getTitle()->getPrefixedText()
1517                 );
1518         }
1519
1520         /**
1521          * Perform a deletion and output success or failure messages
1522          */
1523         public function doDelete( $reason, $suppress = false ) {
1524                 global $wgOut;
1525
1526                 $id = $this->getTitle()->getArticleID( Title::GAID_FOR_UPDATE );
1527
1528                 $error = '';
1529                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, $id, $error ) ) {
1530                         $deleted = $this->getTitle()->getPrefixedText();
1531
1532                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1533                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1534
1535                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1536
1537                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1538                         $wgOut->returnToMain( false );
1539                 } else {
1540                         if ( $error == '' ) {
1541                                 $wgOut->showFatalError(
1542                                         Html::rawElement(
1543                                                 'div',
1544                                                 array( 'class' => 'error mw-error-cannotdelete' ),
1545                                                 wfMsgExt( 'cannotdelete', array( 'parse' ),
1546                                                         wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1547                                         )
1548                                 );
1549
1550                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1551
1552                                 LogEventsList::showLogExtract(
1553                                         $wgOut,
1554                                         'delete',
1555                                         $this->getTitle()->getPrefixedText()
1556                                 );
1557                         } else {
1558                                 $wgOut->showFatalError( $error );
1559                         }
1560                 }
1561         }
1562
1563         /**
1564          * Generate the navigation links when browsing through an article revisions
1565          * It shows the information as:
1566          *   Revision as of \<date\>; view current revision
1567          *   \<- Previous version | Next Version -\>
1568          *
1569          * @param $oldid String: revision ID of this article revision
1570          */
1571         public function setOldSubtitle( $oldid = 0 ) {
1572                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1573
1574                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1575                         return;
1576                 }
1577
1578                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1579
1580                 # Cascade unhide param in links for easy deletion browsing
1581                 $extraParams = array();
1582                 if ( $wgRequest->getVal( 'unhide' ) ) {
1583                         $extraParams['unhide'] = 1;
1584                 }
1585
1586                 $revision = Revision::newFromId( $oldid );
1587                 $timestamp = $revision->getTimestamp();
1588
1589                 $current = ( $oldid == $this->mPage->getLatest() );
1590                 $td = $wgLang->timeanddate( $timestamp, true );
1591                 $tddate = $wgLang->date( $timestamp, true );
1592                 $tdtime = $wgLang->time( $timestamp, true );
1593
1594                 $lnk = $current
1595                         ? wfMsgHtml( 'currentrevisionlink' )
1596                         : Linker::link(
1597                                 $this->getTitle(),
1598                                 wfMsgHtml( 'currentrevisionlink' ),
1599                                 array(),
1600                                 $extraParams,
1601                                 array( 'known', 'noclasses' )
1602                         );
1603                 $curdiff = $current
1604                         ? wfMsgHtml( 'diff' )
1605                         : Linker::link(
1606                                 $this->getTitle(),
1607                                 wfMsgHtml( 'diff' ),
1608                                 array(),
1609                                 array(
1610                                         'diff' => 'cur',
1611                                         'oldid' => $oldid
1612                                 ) + $extraParams,
1613                                 array( 'known', 'noclasses' )
1614                         );
1615                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1616                 $prevlink = $prev
1617                         ? Linker::link(
1618                                 $this->getTitle(),
1619                                 wfMsgHtml( 'previousrevision' ),
1620                                 array(),
1621                                 array(
1622                                         'direction' => 'prev',
1623                                         'oldid' => $oldid
1624                                 ) + $extraParams,
1625                                 array( 'known', 'noclasses' )
1626                         )
1627                         : wfMsgHtml( 'previousrevision' );
1628                 $prevdiff = $prev
1629                         ? Linker::link(
1630                                 $this->getTitle(),
1631                                 wfMsgHtml( 'diff' ),
1632                                 array(),
1633                                 array(
1634                                         'diff' => 'prev',
1635                                         'oldid' => $oldid
1636                                 ) + $extraParams,
1637                                 array( 'known', 'noclasses' )
1638                         )
1639                         : wfMsgHtml( 'diff' );
1640                 $nextlink = $current
1641                         ? wfMsgHtml( 'nextrevision' )
1642                         : Linker::link(
1643                                 $this->getTitle(),
1644                                 wfMsgHtml( 'nextrevision' ),
1645                                 array(),
1646                                 array(
1647                                         'direction' => 'next',
1648                                         'oldid' => $oldid
1649                                 ) + $extraParams,
1650                                 array( 'known', 'noclasses' )
1651                         );
1652                 $nextdiff = $current
1653                         ? wfMsgHtml( 'diff' )
1654                         : Linker::link(
1655                                 $this->getTitle(),
1656                                 wfMsgHtml( 'diff' ),
1657                                 array(),
1658                                 array(
1659                                         'diff' => 'next',
1660                                         'oldid' => $oldid
1661                                 ) + $extraParams,
1662                                 array( 'known', 'noclasses' )
1663                         );
1664
1665                 $cdel = '';
1666
1667                 // User can delete revisions or view deleted revisions...
1668                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1669                 if ( $canHide || ( $revision->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
1670                         if ( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
1671                                 $cdel = Linker::revDeleteLinkDisabled( $canHide ); // rev was hidden from Sysops
1672                         } else {
1673                                 $query = array(
1674                                         'type'   => 'revision',
1675                                         'target' => $this->getTitle()->getPrefixedDbkey(),
1676                                         'ids'    => $oldid
1677                                 );
1678                                 $cdel = Linker::revDeleteLink( $query, $revision->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1679                         }
1680                         $cdel .= ' ';
1681                 }
1682
1683                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1684                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1685
1686                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1687                         ? 'revision-info-current'
1688                         : 'revision-info';
1689
1690                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" .
1691                         wfMsgExt(
1692                                 $infomsg,
1693                                 array( 'parseinline', 'replaceafter' ),
1694                                 $td,
1695                                 $userlinks,
1696                                 $revision->getID(),
1697                                 $tddate,
1698                                 $tdtime,
1699                                 $revision->getUser()
1700                         ) .
1701                         "</div>\n" .
1702                         "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1703                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
1704
1705                 $wgOut->setSubtitle( $r );
1706         }
1707
1708         /* Caching functions */
1709
1710         /**
1711          * checkLastModified returns true if it has taken care of all
1712          * output to the client that is necessary for this request.
1713          * (that is, it has sent a cached version of the page)
1714          *
1715          * @return boolean true if cached version send, false otherwise
1716          */
1717         protected function tryFileCache() {
1718                 static $called = false;
1719
1720                 if ( $called ) {
1721                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1722                         return false;
1723                 }
1724
1725                 $called = true;
1726                 if ( $this->isFileCacheable() ) {
1727                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1728                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1729                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1730                                 $cache->loadFromFileCache( $this->getContext() );
1731                                 return true;
1732                         } else {
1733                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1734                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1735                         }
1736                 } else {
1737                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1738                 }
1739
1740                 return false;
1741         }
1742
1743         /**
1744          * Check if the page can be cached
1745          * @return bool
1746          */
1747         public function isFileCacheable() {
1748                 $cacheable = false;
1749
1750                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1751                         $cacheable = $this->mPage->getID()
1752                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1753                         // Extension may have reason to disable file caching on some pages.
1754                         if ( $cacheable ) {
1755                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1756                         }
1757                 }
1758
1759                 return $cacheable;
1760         }
1761
1762         /**#@-*/
1763
1764         /**
1765          * Add the primary page-view wikitext to the output buffer
1766          * Saves the text into the parser cache if possible.
1767          * Updates templatelinks if it is out of date.
1768          *
1769          * @param $text String
1770          * @param $cache Boolean
1771          * @param $parserOptions mixed ParserOptions object, or boolean false
1772          */
1773         public function outputWikiText( $text, $cache = true, $parserOptions = false ) {
1774                 global $wgOut;
1775
1776                 $this->mParserOutput = $this->getOutputFromWikitext( $text, $cache, $parserOptions );
1777
1778                 $this->doCascadeProtectionUpdates( $this->mParserOutput );
1779
1780                 $wgOut->addParserOutput( $this->mParserOutput );
1781         }
1782
1783         /**
1784          * Lightweight method to get the parser output for a page, checking the parser cache
1785          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1786          * consider, so it's not appropriate to use there.
1787          *
1788          * @since 1.16 (r52326) for LiquidThreads
1789          *
1790          * @param $oldid mixed integer Revision ID or null
1791          * @param $user User The relevant user
1792          * @return ParserOutput or false if the given revsion ID is not found
1793          */
1794         public function getParserOutput( $oldid = null, User $user = null ) {
1795                 global $wgEnableParserCache, $wgUser;
1796                 $user = is_null( $user ) ? $wgUser : $user;
1797
1798                 wfProfileIn( __METHOD__ );
1799                 // Should the parser cache be used?
1800                 $useParserCache = $wgEnableParserCache &&
1801                         $user->getStubThreshold() == 0 &&
1802                         $this->mPage->exists() &&
1803                         $oldid === null;
1804
1805                 wfDebug( __METHOD__ . ': using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
1806
1807                 if ( $user->getStubThreshold() ) {
1808                         wfIncrStats( 'pcache_miss_stub' );
1809                 }
1810
1811                 if ( $useParserCache ) {
1812                         $options = $this->mPage->makeParserOptions( $user );
1813                         $parserOutput = ParserCache::singleton()->get( $this, $options );
1814                         if ( $parserOutput !== false ) {
1815                                 wfProfileOut( __METHOD__ );
1816                                 return $parserOutput;
1817                         }
1818                 }
1819
1820                 // Cache miss; parse and output it.
1821                 if ( $oldid === null ) {
1822                         $text = $this->mPage->getRawText();
1823                 } else {
1824                         $rev = Revision::newFromTitle( $this->getTitle(), $oldid );
1825                         if ( $rev === null ) {
1826                                 wfProfileOut( __METHOD__ );
1827                                 return false;
1828                         }
1829                         $text = $rev->getText();
1830                 }
1831
1832                 $output = $this->getOutputFromWikitext( $text, $useParserCache );
1833                 wfProfileOut( __METHOD__ );
1834                 return $output;
1835         }
1836
1837         /**
1838          * This does all the heavy lifting for outputWikitext, except it returns the parser
1839          * output instead of sending it straight to $wgOut. Makes things nice and simple for,
1840          * say, embedding thread pages within a discussion system (LiquidThreads)
1841          *
1842          * @param $text string
1843          * @param $cache boolean
1844          * @param $parserOptions parsing options, defaults to false
1845          * @return ParserOutput
1846          */
1847         public function getOutputFromWikitext( $text, $cache = true, $parserOptions = false ) {
1848                 global $wgParser, $wgEnableParserCache, $wgUseFileCache;
1849
1850                 if ( !$parserOptions ) {
1851                         $parserOptions = $this->getParserOptions();
1852                 }
1853
1854                 $time = - wfTime();
1855                 $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(),
1856                         $parserOptions, true, true, $this->getRevIdFetched() );
1857                 $time += wfTime();
1858
1859                 # Timing hack
1860                 if ( $time > 3 ) {
1861                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
1862                                 $this->getTitle()->getPrefixedDBkey() ) );
1863                 }
1864
1865                 if ( $wgEnableParserCache && $cache && $this->mParserOutput->isCacheable() ) {
1866                         $parserCache = ParserCache::singleton();
1867                         $parserCache->save( $this->mParserOutput, $this, $parserOptions );
1868                 }
1869
1870                 // Make sure file cache is not used on uncacheable content.
1871                 // Output that has magic words in it can still use the parser cache
1872                 // (if enabled), though it will generally expire sooner.
1873                 if ( !$this->mParserOutput->isCacheable() || $this->mParserOutput->containsOldMagic() ) {
1874                         $wgUseFileCache = false;
1875                 }
1876
1877                 if ( $this->isCurrent() ) {
1878                         $this->mPage->doCascadeProtectionUpdates( $this->mParserOutput );
1879                 }
1880
1881                 return $this->mParserOutput;
1882         }
1883
1884         /**
1885          * Get parser options suitable for rendering the primary article wikitext
1886          * @return ParserOptions|false
1887          */
1888         public function getParserOptions() {
1889                 global $wgUser;
1890                 if ( !$this->mParserOptions ) {
1891                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1892                 }
1893                 // Clone to allow modifications of the return value without affecting cache
1894                 return clone $this->mParserOptions;
1895         }
1896
1897         /**
1898          * Sets the context this Article is executed in
1899          *
1900          * @param $context IContextSource
1901          * @since 1.18
1902          */
1903         public function setContext( $context ) {
1904                 $this->mContext = $context;
1905         }
1906
1907         /**
1908          * Gets the context this Article is executed in
1909          *
1910          * @return IContextSource
1911          * @since 1.18
1912          */
1913         public function getContext() {
1914                 if ( $this->mContext instanceof IContextSource ) {
1915                         return $this->mContext;
1916                 } else {
1917                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1918                         return RequestContext::getMain();
1919                 }
1920         }
1921
1922         /**
1923          * Use PHP's magic __get handler to handle accessing of
1924          * raw WikiPage fields for backwards compatibility.
1925          *
1926          * @param $fname String Field name
1927          */
1928         public function __get( $fname ) {
1929                 if ( property_exists( $this->mPage, $fname ) ) {
1930                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1931                         return $this->mPage->$fname;
1932                 }
1933                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1934         }
1935
1936         /**
1937          * Use PHP's magic __set handler to handle setting of
1938          * raw WikiPage fields for backwards compatibility.
1939          *
1940          * @param $fname String Field name
1941          * @param $fvalue mixed New value
1942          */
1943         public function __set( $fname, $fvalue ) {
1944                 if ( property_exists( $this->mPage, $fname ) ) {
1945                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1946                         $this->mPage->$fname = $fvalue;
1947                 // Note: extensions may want to toss on new fields
1948                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1949                         $this->mPage->$fname = $fvalue;
1950                 } else {
1951                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1952                 }
1953         }
1954
1955         /**
1956          * Use PHP's magic __call handler to transform instance calls to
1957          * WikiPage functions for backwards compatibility.
1958          *
1959          * @param $fname String Name of called method
1960          * @param $args Array Arguments to the method
1961          */
1962         public function __call( $fname, $args ) {
1963                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1964                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1965                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1966                 }
1967                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1968         }
1969
1970         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1971
1972         /**
1973          * @param $limit array
1974          * @param $reason string
1975          * @param $cascade int
1976          * @param $expiry array
1977          * @return bool
1978          */
1979         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1980                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1981         }
1982
1983         /**
1984          * @param $reason string
1985          * @param $suppress bool
1986          * @param $id int
1987          * @param $commit bool
1988          * @param $error string
1989          * @return bool
1990          */
1991         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1992                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1993         }
1994
1995         /**
1996          * @param $fromP
1997          * @param $summary
1998          * @param $token
1999          * @param $bot
2000          * @param $resultDetails
2001          * @param $user User
2002          * @return array
2003          */
2004         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2005                 global $wgUser;
2006                 $user = is_null( $user ) ? $wgUser : $user;
2007                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2008         }
2009
2010         /**
2011          * @param $fromP
2012          * @param $summary
2013          * @param $bot
2014          * @param $resultDetails
2015          * @param $guser User
2016          * @return array
2017          */
2018         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2019                 global $wgUser;
2020                 $guser = is_null( $guser ) ? $wgUser : $guser;
2021                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2022         }
2023
2024         /**
2025          * @param $hasHistory bool
2026          * @return mixed
2027          */
2028         public function generateReason( &$hasHistory ) {
2029                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2030         }
2031
2032         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
2033
2034         /**
2035          * @return array
2036          */
2037         public static function selectFields() {
2038                 return WikiPage::selectFields();
2039         }
2040
2041         /**
2042          * @param $title Title
2043          */
2044         public static function onArticleCreate( $title ) {
2045                 return WikiPage::onArticleCreate( $title );
2046         }
2047
2048         /**
2049          * @param $title Title
2050          */
2051         public static function onArticleDelete( $title ) {
2052                 return WikiPage::onArticleDelete( $title );
2053         }
2054
2055         /**
2056          * @param $title Title
2057          */
2058         public static function onArticleEdit( $title ) {
2059                 return WikiPage::onArticleEdit( $title );
2060         }
2061
2062         /**
2063          * @param $oldtext
2064          * @param $newtext
2065          * @param $flags
2066          * @return string
2067          */
2068         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2069                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2070         }
2071         // ******
2072 }
2073
2074 class PoolWorkArticleView extends PoolCounterWork {
2075
2076         /**
2077          * @var Article
2078          */
2079         private $mArticle;
2080
2081         function __construct( $article, $key, $useParserCache, $parserOptions ) {
2082                 parent::__construct( 'ArticleView', $key );
2083                 $this->mArticle = $article;
2084                 $this->cacheable = $useParserCache;
2085                 $this->parserOptions = $parserOptions;
2086         }
2087
2088         function doWork() {
2089                 return $this->mArticle->doViewParse();
2090         }
2091
2092         function getCachedWork() {
2093                 global $wgOut;
2094
2095                 $parserCache = ParserCache::singleton();
2096                 $this->mArticle->mParserOutput = $parserCache->get( $this->mArticle, $this->parserOptions );
2097
2098                 if ( $this->mArticle->mParserOutput !== false ) {
2099                         wfDebug( __METHOD__ . ": showing contents parsed by someone else\n" );
2100                         $wgOut->addParserOutput( $this->mArticle->mParserOutput );
2101                         # Ensure that UI elements requiring revision ID have
2102                         # the correct version information.
2103                         $wgOut->setRevisionId( $this->mArticle->getLatest() );
2104                         return true;
2105                 }
2106                 return false;
2107         }
2108
2109         function fallback() {
2110                 return $this->mArticle->tryDirtyCache();
2111         }
2112
2113         /**
2114          * @param $status Status
2115          */
2116         function error( $status ) {
2117                 global $wgOut;
2118
2119                 $wgOut->clearHTML(); // for release() errors
2120                 $wgOut->enableClientCache( false );
2121                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2122
2123                 $errortext = $status->getWikiText( false, 'view-pool-error' );
2124                 $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
2125
2126                 return false;
2127         }
2128 }