includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class for viewing MediaWiki article and history.
   9  *
  10  * This maintains WikiPage functions for backwards compatibility.
  11  *
  12  * @TODO: move and rewrite code to an Action class
  13  *
  14  * See design.txt for an overview.
  15  * Note: edit user interface and cache support functions have been
  16  * moved to separate EditPage and HTMLFileCache classes.
  17  *
  18  * @internal documentation reviewed 15 Mar 2010
  19  */
  20 class Article extends Page {
  21         /**@{{
  22          * @private
  23          */
  24
  25         /**
  26          * @var IContextSource
  27          */
  28         protected $mContext;
  29
  30         /**
  31          * @var WikiPage
  32          */
  33         protected $mPage;
  34
  35         /**
  36          * @var ParserOptions: ParserOptions object for $wgUser articles
  37          */
  38         public $mParserOptions;
  39
  40         var $mContent;                    // !<
  41         var $mContentLoaded = false;      // !<
  42         var $mOldId;                      // !<
  43
  44         /**
  45          * @var Title
  46          */
  47         var $mRedirectedFrom = null;
  48
  49         /**
  50          * @var mixed: boolean false or URL string
  51          */
  52         var $mRedirectUrl = false;        // !<
  53         var $mRevIdFetched = 0;           // !<
  54
  55         /**
  56          * @var Revision
  57          */
  58         var $mRevision = null;
  59
  60         /**
  61          * @var ParserOutput
  62          */
  63         var $mParserOutput;
  64
  65         /**@}}*/
  66
  67         /**
  68          * Constructor and clear the article
  69          * @param $title Title Reference to a Title object.
  70          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  71          */
  72         public function __construct( Title $title, $oldId = null ) {
  73                 $this->mOldId = $oldId;
  74                 $this->mPage = $this->newPage( $title );
  75         }
  76
  77         /**
  78          * @param $title Title
  79          * @return WikiPage
  80          */
  81         protected function newPage( Title $title ) {
  82                 return new WikiPage( $title );
  83         }
  84
  85         /**
  86          * Constructor from a page id
  87          * @param $id Int article ID to load
  88          * @return Article|null
  89          */
  90         public static function newFromID( $id ) {
  91                 $t = Title::newFromID( $id );
  92                 # @todo FIXME: Doesn't inherit right
  93                 return $t == null ? null : new self( $t );
  94                 # return $t == null ? null : new static( $t ); // PHP 5.3
  95         }
  96
  97         /**
  98          * Create an Article object of the appropriate class for the given page.
  99          *
 100          * @param $title Title
 101          * @param $context IContextSource
 102          * @return Article object
 103          */
 104         public static function newFromTitle( $title, IContextSource $context ) {
 105                 if ( NS_MEDIA == $title->getNamespace() ) {
 106                         // FIXME: where should this go?
 107                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 108                 }
 109
 110                 $page = null;
 111                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 112                 if ( !$page ) {
 113                         switch( $title->getNamespace() ) {
 114                                 case NS_FILE:
 115                                         $page = new ImagePage( $title );
 116                                         break;
 117                                 case NS_CATEGORY:
 118                                         $page = new CategoryPage( $title );
 119                                         break;
 120                                 default:
 121                                         $page = new Article( $title );
 122                         }
 123                 }
 124                 $page->setContext( $context );
 125
 126                 return $page;
 127         }
 128
 129         /**
 130          * 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          */
 149         public function clear() {
 150                 $this->mContentLoaded = false;
 151
 152                 $this->mRedirectedFrom = null; # Title object if set
 153                 $this->mRevIdFetched = 0;
 154                 $this->mRedirectUrl = false;
 155
 156                 $this->mPage->clear();
 157         }
 158
 159         /**
 160          * Note that getContent/loadContent do not follow redirects anymore.
 161          * If you need to fetch redirectable content easily, try
 162          * the shortcut in Article::followRedirect()
 163          *
 164          * This function has side effects! Do not use this function if you
 165          * only want the real revision text if any.
 166          *
 167          * @return Return the text of this revision
 168          */
 169         public function getContent() {
 170                 global $wgUser;
 171
 172                 wfProfileIn( __METHOD__ );
 173
 174                 if ( $this->mPage->getID() === 0 ) {
 175                         # If this is a MediaWiki:x message, then load the messages
 176                         # and return the message value for x.
 177                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 178                                 $text = $this->getTitle()->getDefaultMessageText();
 179                                 if ( $text === false ) {
 180                                         $text = '';
 181                                 }
 182                         } else {
 183                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 184                         }
 185                         wfProfileOut( __METHOD__ );
 186
 187                         return $text;
 188                 } else {
 189                         $this->loadContent();
 190                         wfProfileOut( __METHOD__ );
 191
 192                         return $this->mContent;
 193                 }
 194         }
 195
 196         /**
 197          * @return int The oldid of the article that is to be shown, 0 for the
 198          *             current revision
 199          */
 200         public function getOldID() {
 201                 if ( is_null( $this->mOldId ) ) {
 202                         $this->mOldId = $this->getOldIDFromRequest();
 203                 }
 204
 205                 return $this->mOldId;
 206         }
 207
 208         /**
 209          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 210          *
 211          * @return int The old id for the request
 212          */
 213         public function getOldIDFromRequest() {
 214                 global $wgRequest;
 215
 216                 $this->mRedirectUrl = false;
 217
 218                 $oldid = $wgRequest->getVal( 'oldid' );
 219
 220                 if ( isset( $oldid ) ) {
 221                         $oldid = intval( $oldid );
 222                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 223                                 $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 224                                 if ( $nextid ) {
 225                                         $oldid = $nextid;
 226                                 } else {
 227                                         $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 228                                 }
 229                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 230                                 $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 231                                 if ( $previd ) {
 232                                         $oldid = $previd;
 233                                 }
 234                         }
 235                 }
 236
 237                 if ( !$oldid ) {
 238                         $oldid = 0;
 239                 }
 240
 241                 return $oldid;
 242         }
 243
 244         /**
 245          * Load the revision (including text) into this object
 246          */
 247         function loadContent() {
 248                 if ( $this->mContentLoaded ) {
 249                         return;
 250                 }
 251
 252                 wfProfileIn( __METHOD__ );
 253
 254                 $this->fetchContent( $this->getOldID() );
 255
 256                 wfProfileOut( __METHOD__ );
 257         }
 258
 259         /**
 260          * Get text of an article from database
 261          * Does *NOT* follow redirects.
 262          *
 263          * @param $oldid Int: 0 for whatever the latest revision is
 264          * @return mixed string containing article contents, or false if null
 265          */
 266         function fetchContent( $oldid = 0 ) {
 267                 if ( $this->mContentLoaded ) {
 268                         return $this->mContent;
 269                 }
 270
 271                 # Pre-fill content with error message so that if something
 272                 # fails we'll have something telling us what we intended.
 273                 $t = $this->getTitle()->getPrefixedText();
 274                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 275                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 276
 277                 if ( $oldid ) {
 278                         $revision = Revision::newFromId( $oldid );
 279                         if ( !$revision ) {
 280                                 wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 281                                 return false;
 282                         }
 283                         // Revision title doesn't match the page title given?
 284                         if ( $this->mPage->getID() != $revision->getPage() ) {
 285                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 286                                 $this->mPage = call_user_func( $function, $revision->getPage() );
 287                                 if ( !$this->mPage->getId() ) {
 288                                         wfDebug( __METHOD__ . " failed to get page data linked to revision id $oldid\n" );
 289                                         return false;
 290                                 }
 291                         }
 292                 } else {
 293                         if ( !$this->mPage->getLatest() ) {
 294                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 295                                 return false;
 296                         }
 297
 298                         $revision = $this->mPage->getRevision();
 299                         if ( !$revision ) {
 300                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 301                                 return false;
 302                         }
 303                 }
 304
 305                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 306                 // We should instead work with the Revision object when we need it...
 307                 $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 308
 309                 $this->mRevIdFetched = $revision->getId();
 310                 $this->mContentLoaded = true;
 311                 $this->mRevision =& $revision;
 312
 313                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 314
 315                 return $this->mContent;
 316         }
 317
 318         /**
 319          * No-op
 320          * @deprecated since 1.18
 321          */
 322         public function forUpdate() {
 323                 wfDeprecated( __METHOD__ );
 324         }
 325
 326         /**
 327          * Returns true if the currently-referenced revision is the current edit
 328          * to this page (and it exists).
 329          * @return bool
 330          */
 331         public function isCurrent() {
 332                 # If no oldid, this is the current version.
 333                 if ( $this->getOldID() == 0 ) {
 334                         return true;
 335                 }
 336
 337                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 338         }
 339
 340         /**
 341          * Use this to fetch the rev ID used on page views
 342          *
 343          * @return int revision ID of last article revision
 344          */
 345         public function getRevIdFetched() {
 346                 if ( $this->mRevIdFetched ) {
 347                         return $this->mRevIdFetched;
 348                 } else {
 349                         return $this->mPage->getLatest();
 350                 }
 351         }
 352
 353         /**
 354          * This is the default action of the index.php entry point: just view the
 355          * page of the given title.
 356          */
 357         public function view() {
 358                 global $wgUser, $wgOut, $wgRequest, $wgParser;
 359                 global $wgUseFileCache, $wgUseETag;
 360
 361                 wfProfileIn( __METHOD__ );
 362
 363                 # Get variables from query string
 364                 $oldid = $this->getOldID();
 365
 366                 # getOldID may want us to redirect somewhere else
 367                 if ( $this->mRedirectUrl ) {
 368                         $wgOut->redirect( $this->mRedirectUrl );
 369                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 370                         wfProfileOut( __METHOD__ );
 371
 372                         return;
 373                 }
 374
 375                 # Set page title (may be overridden by DISPLAYTITLE)
 376                 $wgOut->setPageTitle( $this->getTitle()->getPrefixedText() );
 377
 378                 # If we got diff in the query, we want to see a diff page instead of the article.
 379                 if ( $wgRequest->getCheck( 'diff' ) ) {
 380                         wfDebug( __METHOD__ . ": showing diff page\n" );
 381                         $this->showDiffPage();
 382                         wfProfileOut( __METHOD__ );
 383
 384                         return;
 385                 }
 386
 387                 $wgOut->setArticleFlag( true );
 388                 # Allow frames by default
 389                 $wgOut->allowClickjacking();
 390
 391                 $parserCache = ParserCache::singleton();
 392
 393                 $parserOptions = $this->getParserOptions();
 394                 # Render printable version, use printable version cache
 395                 if ( $wgOut->isPrintable() ) {
 396                         $parserOptions->setIsPrintable( true );
 397                         $parserOptions->setEditSection( false );
 398                 } elseif ( $wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 399                         $parserOptions->setEditSection( false );
 400                 }
 401
 402                 # Try client and file cache
 403                 if ( $oldid === 0 && $this->mPage->checkTouched() ) {
 404                         if ( $wgUseETag ) {
 405                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 406                         }
 407
 408                         # Is it client cached?
 409                         if ( $wgOut->checkLastModified( $this->mPage->getTouched() ) ) {
 410                                 wfDebug( __METHOD__ . ": done 304\n" );
 411                                 wfProfileOut( __METHOD__ );
 412
 413                                 return;
 414                         # Try file cache
 415                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 416                                 wfDebug( __METHOD__ . ": done file cache\n" );
 417                                 # tell wgOut that output is taken care of
 418                                 $wgOut->disable();
 419                                 $this->mPage->viewUpdates();
 420                                 wfProfileOut( __METHOD__ );
 421
 422                                 return;
 423                         }
 424                 }
 425
 426                 if ( !$wgUseETag && !$this->getTitle()->quickUserCan( 'edit' ) ) {
 427                         $parserOptions->setEditSection( false );
 428                 }
 429
 430                 # Should the parser cache be used?
 431                 $useParserCache = $this->useParserCache( $oldid );
 432                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 433                 if ( $wgUser->getStubThreshold() ) {
 434                         wfIncrStats( 'pcache_miss_stub' );
 435                 }
 436
 437                 $wasRedirected = $this->showRedirectedFromHeader();
 438                 $this->showNamespaceHeader();
 439
 440                 # Iterate through the possible ways of constructing the output text.
 441                 # Keep going until $outputDone is set, or we run out of things to do.
 442                 $pass = 0;
 443                 $outputDone = false;
 444                 $this->mParserOutput = false;
 445
 446                 while ( !$outputDone && ++$pass ) {
 447                         switch( $pass ) {
 448                                 case 1:
 449                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 450                                         break;
 451                                 case 2:
 452                                         # Try the parser cache
 453                                         if ( $useParserCache ) {
 454                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 455
 456                                                 if ( $this->mParserOutput !== false ) {
 457                                                         wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 458                                                         $wgOut->addParserOutput( $this->mParserOutput );
 459                                                         # Ensure that UI elements requiring revision ID have
 460                                                         # the correct version information.
 461                                                         $wgOut->setRevisionId( $this->mPage->getLatest() );
 462                                                         $outputDone = true;
 463                                                         # Preload timestamp to avoid a DB hit
 464                                                         if ( isset( $this->mParserOutput->mTimestamp ) ) {
 465                                                                 $this->mPage->setTimestamp( $this->mParserOutput->mTimestamp );
 466                                                         }
 467                                                 }
 468                                         }
 469                                         break;
 470                                 case 3:
 471                                         $text = $this->getContent();
 472                                         if ( $text === false || $this->mPage->getID() == 0 ) {
 473                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 474                                                 $this->showMissingArticle();
 475                                                 wfProfileOut( __METHOD__ );
 476                                                 return;
 477                                         }
 478
 479                                         # Another whitelist check in case oldid is altering the title
 480                                         if ( !$this->getTitle()->userCanRead() ) {
 481                                                 wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 482                                                 $wgOut->loginToUse();
 483                                                 $wgOut->output();
 484                                                 $wgOut->disable();
 485                                                 wfProfileOut( __METHOD__ );
 486                                                 return;
 487                                         }
 488
 489                                         # Are we looking at an old revision
 490                                         if ( $oldid && !is_null( $this->mRevision ) ) {
 491                                                 $this->setOldSubtitle( $oldid );
 492
 493                                                 if ( !$this->showDeletedRevisionHeader() ) {
 494                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 495                                                         wfProfileOut( __METHOD__ );
 496                                                         return;
 497                                                 }
 498
 499                                                 # If this "old" version is the current, then try the parser cache...
 500                                                 if ( $oldid === $this->mPage->getLatest() && $this->useParserCache( false ) ) {
 501                                                         $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 502                                                         if ( $this->mParserOutput ) {
 503                                                                 wfDebug( __METHOD__ . ": showing parser cache for current rev permalink\n" );
 504                                                                 $wgOut->addParserOutput( $this->mParserOutput );
 505                                                                 $wgOut->setRevisionId( $this->mPage->getLatest() );
 506                                                                 $outputDone = true;
 507                                                                 break;
 508                                                         }
 509                                                 }
 510                                         }
 511
 512                                         # Ensure that UI elements requiring revision ID have
 513                                         # the correct version information.
 514                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 515
 516                                         # Pages containing custom CSS or JavaScript get special treatment
 517                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 518                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 519                                                 $this->showCssOrJsPage();
 520                                                 $outputDone = true;
 521                                         } elseif( !wfRunHooks( 'ArticleViewCustom', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 522                                                 # Allow extensions do their own custom view for certain pages
 523                                                 $outputDone = true;
 524                                         } else {
 525                                                 $rt = Title::newFromRedirectArray( $text );
 526                                                 if ( $rt ) {
 527                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 528                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 529                                                         # Don't append the subtitle if this was an old revision
 530                                                         $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
 531                                                         # Parse just to get categories, displaytitle, etc.
 532                                                         $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(), $parserOptions );
 533                                                         $wgOut->addParserOutputNoText( $this->mParserOutput );
 534                                                         $outputDone = true;
 535                                                 }
 536                                         }
 537                                         break;
 538                                 case 4:
 539                                         # Run the parse, protected by a pool counter
 540                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 541
 542                                         $key = $parserCache->getKey( $this, $parserOptions );
 543                                         $poolArticleView = new PoolWorkArticleView( $this, $key, $useParserCache, $parserOptions );
 544
 545                                         if ( !$poolArticleView->execute() ) {
 546                                                 # Connection or timeout error
 547                                                 wfProfileOut( __METHOD__ );
 548                                                 return;
 549                                         } else {
 550                                                 $outputDone = true;
 551                                         }
 552                                         break;
 553                                 # Should be unreachable, but just in case...
 554                                 default:
 555                                         break 2;
 556                         }
 557                 }
 558
 559                 # Get the ParserOutput actually *displayed* here.
 560                 # Note that $this->mParserOutput is the *current* version output.
 561                 $pOutput = ( $outputDone instanceof ParserOutput )
 562                         ? $outputDone // object fetched by hook
 563                         : $this->mParserOutput;
 564
 565                 # Adjust title for main page & pages with displaytitle
 566                 if ( $pOutput ) {
 567                         $this->adjustDisplayTitle( $pOutput );
 568                 }
 569
 570                 # For the main page, overwrite the <title> element with the con-
 571                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 572                 # that's not empty).
 573                 # This message always exists because it is in the i18n files
 574                 if ( $this->getTitle()->isMainPage() ) {
 575                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 576                         if ( !$msg->isDisabled() ) {
 577                                 $wgOut->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 578                         }
 579                 }
 580
 581                 # Check for any __NOINDEX__ tags on the page using $pOutput
 582                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 583                 $wgOut->setIndexPolicy( $policy['index'] );
 584                 $wgOut->setFollowPolicy( $policy['follow'] );
 585
 586                 $this->showViewFooter();
 587                 $this->mPage->viewUpdates();
 588
 589                 wfProfileOut( __METHOD__ );
 590         }
 591
 592         /**
 593          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 594          * @param $pOutput ParserOutput
 595          */
 596         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 597                 global $wgOut;
 598                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 599                 $titleText = $pOutput->getTitleText();
 600                 if ( strval( $titleText ) !== '' ) {
 601                         $wgOut->setPageTitle( $titleText );
 602                 }
 603         }
 604
 605         /**
 606          * Show a diff page according to current request variables. For use within
 607          * Article::view() only, other callers should use the DifferenceEngine class.
 608          */
 609         public function showDiffPage() {
 610                 global $wgRequest, $wgUser;
 611
 612                 $diff = $wgRequest->getVal( 'diff' );
 613                 $rcid = $wgRequest->getVal( 'rcid' );
 614                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 615                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 616                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
 617                 $oldid = $this->getOldID();
 618
 619                 $de = new DifferenceEngine( $this->getTitle(), $oldid, $diff, $rcid, $purge, $unhide );
 620                 // DifferenceEngine directly fetched the revision:
 621                 $this->mRevIdFetched = $de->mNewid;
 622                 $de->showDiffPage( $diffOnly );
 623
 624                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 625                         # Run view updates for current revision only
 626                         $this->mPage->viewUpdates();
 627                 }
 628         }
 629
 630         /**
 631          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 632          * Article::view() only.
 633          *
 634          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 635          * page views.
 636          */
 637         protected function showCssOrJsPage() {
 638                 global $wgOut;
 639
 640                 $dir = $this->getContext()->getLang()->getDir();
 641                 $lang = $this->getContext()->getLang()->getCode();
 642
 643                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 644                         'clearyourcache' );
 645
 646                 // Give hooks a chance to customise the output
 647                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->getTitle(), $wgOut ) ) ) {
 648                         // Wrap the whole lot in a <pre> and don't parse
 649                         $m = array();
 650                         preg_match( '!\.(css|js)$!u', $this->getTitle()->getText(), $m );
 651                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 652                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 653                         $wgOut->addHTML( "\n</pre>\n" );
 654                 }
 655         }
 656
 657         /**
 658          * Get the robot policy to be used for the current view
 659          * @param $action String the action= GET parameter
 660          * @param $pOutput ParserOutput
 661          * @return Array the policy that should be set
 662          * TODO: actions other than 'view'
 663          */
 664         public function getRobotPolicy( $action, $pOutput ) {
 665                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
 666                 global $wgDefaultRobotPolicy, $wgRequest;
 667
 668                 $ns = $this->getTitle()->getNamespace();
 669
 670                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
 671                         # Don't index user and user talk pages for blocked users (bug 11443)
 672                         if ( !$this->getTitle()->isSubpage() ) {
 673                                 if ( Block::newFromTarget( null, $this->getTitle()->getText() ) instanceof Block ) {
 674                                         return array(
 675                                                 'index'  => 'noindex',
 676                                                 'follow' => 'nofollow'
 677                                         );
 678                                 }
 679                         }
 680                 }
 681
 682                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 683                         # Non-articles (special pages etc), and old revisions
 684                         return array(
 685                                 'index'  => 'noindex',
 686                                 'follow' => 'nofollow'
 687                         );
 688                 } elseif ( $wgOut->isPrintable() ) {
 689                         # Discourage indexing of printable versions, but encourage following
 690                         return array(
 691                                 'index'  => 'noindex',
 692                                 'follow' => 'follow'
 693                         );
 694                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
 695                         # For ?curid=x urls, disallow indexing
 696                         return array(
 697                                 'index'  => 'noindex',
 698                                 'follow' => 'follow'
 699                         );
 700                 }
 701
 702                 # Otherwise, construct the policy based on the various config variables.
 703                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 704
 705                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 706                         # Honour customised robot policies for this namespace
 707                         $policy = array_merge(
 708                                 $policy,
 709                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 710                         );
 711                 }
 712                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 713                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 714                         # a final sanity check that we have really got the parser output.
 715                         $policy = array_merge(
 716                                 $policy,
 717                                 array( 'index' => $pOutput->getIndexPolicy() )
 718                         );
 719                 }
 720
 721                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 722                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 723                         $policy = array_merge(
 724                                 $policy,
 725                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 726                         );
 727                 }
 728
 729                 return $policy;
 730         }
 731
 732         /**
 733          * Converts a String robot policy into an associative array, to allow
 734          * merging of several policies using array_merge().
 735          * @param $policy Mixed, returns empty array on null/false/'', transparent
 736          *            to already-converted arrays, converts String.
 737          * @return Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
 738          */
 739         public static function formatRobotPolicy( $policy ) {
 740                 if ( is_array( $policy ) ) {
 741                         return $policy;
 742                 } elseif ( !$policy ) {
 743                         return array();
 744                 }
 745
 746                 $policy = explode( ',', $policy );
 747                 $policy = array_map( 'trim', $policy );
 748
 749                 $arr = array();
 750                 foreach ( $policy as $var ) {
 751                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 752                                 $arr['index'] = $var;
 753                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 754                                 $arr['follow'] = $var;
 755                         }
 756                 }
 757
 758                 return $arr;
 759         }
 760
 761         /**
 762          * If this request is a redirect view, send "redirected from" subtitle to
 763          * $wgOut. Returns true if the header was needed, false if this is not a
 764          * redirect view. Handles both local and remote redirects.
 765          *
 766          * @return boolean
 767          */
 768         public function showRedirectedFromHeader() {
 769                 global $wgOut, $wgRequest, $wgRedirectSources;
 770
 771                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 772
 773                 if ( isset( $this->mRedirectedFrom ) ) {
 774                         // This is an internally redirected page view.
 775                         // We'll need a backlink to the source page for navigation.
 776                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 777                                 $redir = Linker::link(
 778                                         $this->mRedirectedFrom,
 779                                         null,
 780                                         array(),
 781                                         array( 'redirect' => 'no' ),
 782                                         array( 'known', 'noclasses' )
 783                                 );
 784
 785                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 786                                 $wgOut->setSubtitle( $s );
 787
 788                                 // Set the fragment if one was specified in the redirect
 789                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 790                                         $fragment = Xml::escapeJsString( $this->getTitle()->getFragmentForURL() );
 791                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 792                                 }
 793
 794                                 // Add a <link rel="canonical"> tag
 795                                 $wgOut->addLink( array( 'rel' => 'canonical',
 796                                         'href' => $this->getTitle()->getLocalURL() )
 797                                 );
 798
 799                                 return true;
 800                         }
 801                 } elseif ( $rdfrom ) {
 802                         // This is an externally redirected view, from some other wiki.
 803                         // If it was reported from a trusted site, supply a backlink.
 804                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 805                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 806                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
 807                                 $wgOut->setSubtitle( $s );
 808
 809                                 return true;
 810                         }
 811                 }
 812
 813                 return false;
 814         }
 815
 816         /**
 817          * Show a header specific to the namespace currently being viewed, like
 818          * [[MediaWiki:Talkpagetext]]. For Article::view().
 819          */
 820         public function showNamespaceHeader() {
 821                 global $wgOut;
 822
 823                 if ( $this->getTitle()->isTalkPage() ) {
 824                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 825                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
 826                         }
 827                 }
 828         }
 829
 830         /**
 831          * Show the footer section of an ordinary page view
 832          */
 833         public function showViewFooter() {
 834                 global $wgOut, $wgUseTrackbacks;
 835
 836                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 837                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
 838                         $wgOut->addWikiMsg( 'anontalkpagetext' );
 839                 }
 840
 841                 # If we have been passed an &rcid= parameter, we want to give the user a
 842                 # chance to mark this new article as patrolled.
 843                 $this->showPatrolFooter();
 844
 845                 # Trackbacks
 846                 if ( $wgUseTrackbacks ) {
 847                         $this->addTrackbacks();
 848                 }
 849
 850                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
 851
 852         }
 853
 854         /**
 855          * If patrol is possible, output a patrol UI box. This is called from the
 856          * footer section of ordinary page views. If patrol is not possible or not
 857          * desired, does nothing.
 858          */
 859         public function showPatrolFooter() {
 860                 global $wgOut, $wgRequest, $wgUser;
 861
 862                 $rcid = $wgRequest->getVal( 'rcid' );
 863
 864                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol' ) ) {
 865                         return;
 866                 }
 867
 868                 $token = $wgUser->editToken( $rcid );
 869                 $wgOut->preventClickjacking();
 870
 871                 $wgOut->addHTML(
 872                         "<div class='patrollink'>" .
 873                                 wfMsgHtml(
 874                                         'markaspatrolledlink',
 875                                         Linker::link(
 876                                                 $this->getTitle(),
 877                                                 wfMsgHtml( 'markaspatrolledtext' ),
 878                                                 array(),
 879                                                 array(
 880                                                         'action' => 'markpatrolled',
 881                                                         'rcid' => $rcid,
 882                                                         'token' => $token,
 883                                                 ),
 884                                                 array( 'known', 'noclasses' )
 885                                         )
 886                                 ) .
 887                         '</div>'
 888                 );
 889         }
 890
 891         /**
 892          * Show the error text for a missing article. For articles in the MediaWiki
 893          * namespace, show the default message text. To be called from Article::view().
 894          */
 895         public function showMissingArticle() {
 896                 global $wgOut, $wgRequest, $wgUser;
 897
 898                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
 899                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
 900                         $parts = explode( '/', $this->getTitle()->getText() );
 901                         $rootPart = $parts[0];
 902                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
 903                         $ip = User::isIP( $rootPart );
 904
 905                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
 906                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
 907                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
 908                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
 909                                 LogEventsList::showLogExtract(
 910                                         $wgOut,
 911                                         'block',
 912                                         $user->getUserPage()->getPrefixedText(),
 913                                         '',
 914                                         array(
 915                                                 'lim' => 1,
 916                                                 'showIfEmpty' => false,
 917                                                 'msgKey' => array(
 918                                                         'blocked-notice-logextract',
 919                                                         $user->getName() # Support GENDER in notice
 920                                                 )
 921                                         )
 922                                 );
 923                         }
 924                 }
 925
 926                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
 927
 928                 # Show delete and move logs
 929                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->getTitle()->getPrefixedText(), '',
 930                         array(  'lim' => 10,
 931                                 'conds' => array( "log_action != 'revision'" ),
 932                                 'showIfEmpty' => false,
 933                                 'msgKey' => array( 'moveddeleted-notice' ) )
 934                 );
 935
 936                 # Show error message
 937                 $oldid = $this->getOldID();
 938                 if ( $oldid ) {
 939                         $text = wfMsgNoTrans( 'missing-article',
 940                                 $this->getTitle()->getPrefixedText(),
 941                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
 942                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
 943                         // Use the default message text
 944                         $text = $this->getTitle()->getDefaultMessageText();
 945                 } else {
 946                         $createErrors = $this->getTitle()->getUserPermissionsErrors( 'create', $wgUser );
 947                         $editErrors = $this->getTitle()->getUserPermissionsErrors( 'edit', $wgUser );
 948                         $errors = array_merge( $createErrors, $editErrors );
 949
 950                         if ( !count( $errors ) ) {
 951                                 $text = wfMsgNoTrans( 'noarticletext' );
 952                         } else {
 953                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
 954                         }
 955                 }
 956                 $text = "<div class='noarticletext'>\n$text\n</div>";
 957
 958                 if ( !$this->mPage->hasViewableContent() ) {
 959                         // If there's no backing content, send a 404 Not Found
 960                         // for better machine handling of broken links.
 961                         $wgRequest->response()->header( "HTTP/1.1 404 Not Found" );
 962                 }
 963
 964                 $wgOut->addWikiText( $text );
 965         }
 966
 967         /**
 968          * If the revision requested for view is deleted, check permissions.
 969          * Send either an error message or a warning header to $wgOut.
 970          *
 971          * @return boolean true if the view is allowed, false if not.
 972          */
 973         public function showDeletedRevisionHeader() {
 974                 global $wgOut, $wgRequest;
 975
 976                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 977                         // Not deleted
 978                         return true;
 979                 }
 980
 981                 // If the user is not allowed to see it...
 982                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 983                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 984                                 'rev-deleted-text-permission' );
 985
 986                         return false;
 987                 // If the user needs to confirm that they want to see it...
 988                 } elseif ( $wgRequest->getInt( 'unhide' ) != 1 ) {
 989                         # Give explanation and add a link to view the revision...
 990                         $oldid = intval( $this->getOldID() );
 991                         $link = $this->getTitle()->getFullUrl( "oldid={$oldid}&unhide=1" );
 992                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
 993                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
 994                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
 995                                 array( $msg, $link ) );
 996
 997                         return false;
 998                 // We are allowed to see...
 999                 } else {
1000                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1001                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1002                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1003
1004                         return true;
1005                 }
1006         }
1007
1008         /**
1009          * Execute the uncached parse for action=view
1010          * @return bool
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
1093                 /**
1094                  * @var $title Title
1095                  */
1096                 $title = array_shift( $target );
1097
1098                 if ( $forceKnown ) {
1099                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1100                 } else {
1101                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1102                 }
1103
1104                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1105                 $alt = $lang->isRTL() ? '←' : '→';
1106                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1107                 foreach ( $target as $rt ) {
1108                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1109                         if ( $forceKnown ) {
1110                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1111                         } else {
1112                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1113                         }
1114                 }
1115
1116                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1117                 return '<div class="redirectMsg">' .
1118                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1119                         '<span class="redirectText">' . $link . '</span></div>';
1120         }
1121
1122         /**
1123          * Builds trackback links for article display if $wgUseTrackbacks is set to true
1124          */
1125         public function addTrackbacks() {
1126                 global $wgOut;
1127
1128                 $dbr = wfGetDB( DB_SLAVE );
1129                 $tbs = $dbr->select( 'trackbacks',
1130                         array( 'tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name' ),
1131                         array( 'tb_page' => $this->mPage->getID() )
1132                 );
1133
1134                 if ( !$dbr->numRows( $tbs ) ) {
1135                         return;
1136                 }
1137
1138                 $wgOut->preventClickjacking();
1139
1140                 $tbtext = "";
1141                 foreach ( $tbs as $o ) {
1142                         $rmvtxt = "";
1143
1144                         if ( $this->getContext()->getUser()->isAllowed( 'trackback' ) ) {
1145                                 $delurl = $this->getTitle()->getFullURL( "action=deletetrackback&tbid=" .
1146                                         $o->tb_id . "&token=" . urlencode( $this->getContext()->getUser()->editToken() ) );
1147                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
1148                         }
1149
1150                         $tbtext .= "\n";
1151                         $tbtext .= wfMsgNoTrans( strlen( $o->tb_ex ) ? 'trackbackexcerpt' : 'trackback',
1152                                         $o->tb_title,
1153                                         $o->tb_url,
1154                                         $o->tb_ex,
1155                                         $o->tb_name,
1156                                         $rmvtxt );
1157                 }
1158
1159                 $wgOut->wrapWikiMsg( "<div id='mw_trackbacks'>\n$1\n</div>\n", array( 'trackbackbox', $tbtext ) );
1160         }
1161
1162         /**
1163          * Removes trackback record for current article from trackbacks table
1164          * @deprecated since 1.18
1165          */
1166         public function deletetrackback() {
1167                 return Action::factory( 'deletetrackback', $this )->show();
1168         }
1169
1170         /**
1171          * Handle action=render
1172          */
1173
1174         public function render() {
1175                 global $wgOut;
1176
1177                 $wgOut->setArticleBodyOnly( true );
1178                 $this->view();
1179         }
1180
1181         /**
1182          * Handle action=purge
1183          */
1184         public function purge() {
1185                 return Action::factory( 'purge', $this )->show();
1186         }
1187
1188         /**
1189          * Mark this particular edit/page as patrolled
1190          * @deprecated since 1.18
1191          */
1192         public function markpatrolled() {
1193                 Action::factory( 'markpatrolled', $this )->show();
1194         }
1195
1196         /**
1197          * User-interface handler for the "watch" action.
1198          * Requires Request to pass a token as of 1.18.
1199          * @deprecated since 1.18
1200          */
1201         public function watch() {
1202                 Action::factory( 'watch', $this )->show();
1203         }
1204
1205         /**
1206          * Add this page to $wgUser's watchlist
1207          *
1208          * This is safe to be called multiple times
1209          *
1210          * @return bool true on successful watch operation
1211          * @deprecated since 1.18
1212          */
1213         public function doWatch() {
1214                 global $wgUser;
1215                 return WatchAction::doWatch( $this->getTitle(), $wgUser );
1216         }
1217
1218         /**
1219          * User interface handler for the "unwatch" action.
1220          * Requires Request to pass a token as of 1.18.
1221          * @deprecated since 1.18
1222          */
1223         public function unwatch() {
1224                 Action::factory( 'unwatch', $this )->show();
1225         }
1226
1227         /**
1228          * Stop watching a page
1229          * @return bool true on successful unwatch
1230          * @deprecated since 1.18
1231          */
1232         public function doUnwatch() {
1233                 global $wgUser;
1234                 return WatchAction::doUnwatch( $this->getTitle(), $wgUser );
1235         }
1236
1237         /**
1238          * action=protect handler
1239          */
1240         public function protect() {
1241                 $form = new ProtectionForm( $this );
1242                 $form->execute();
1243         }
1244
1245         /**
1246          * action=unprotect handler (alias)
1247          */
1248         public function unprotect() {
1249                 $this->protect();
1250         }
1251
1252         /**
1253          * Info about this page
1254          * Called for ?action=info when $wgAllowPageInfo is on.
1255          */
1256         public function info() {
1257                 Action::factory( 'info', $this )->show();
1258         }
1259
1260         /**
1261          * Overriden by ImagePage class, only present here to avoid a fatal error
1262          * Called for ?action=revert
1263          */
1264         public function revert() {
1265                 Action::factory( 'revert', $this )->show();
1266         }
1267
1268         /**
1269          * User interface for rollback operations
1270          */
1271         public function rollback() {
1272                 Action::factory( 'rollback', $this )->show();
1273         }
1274
1275         /**
1276          * Output a redirect back to the article.
1277          * This is typically used after an edit.
1278          *
1279          * @deprecated in 1.18; call $wgOut->redirect() directly
1280          * @param $noRedir Boolean: add redirect=no
1281          * @param $sectionAnchor String: section to redirect to, including "#"
1282          * @param $extraQuery String: extra query params
1283          */
1284         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1285                 wfDeprecated( __METHOD__ );
1286                 global $wgOut;
1287
1288                 if ( $noRedir ) {
1289                         $query = 'redirect=no';
1290                         if ( $extraQuery )
1291                                 $query .= "&$extraQuery";
1292                 } else {
1293                         $query = $extraQuery;
1294                 }
1295
1296                 $wgOut->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1297         }
1298
1299         /**
1300          * UI entry point for page deletion
1301          */
1302         public function delete() {
1303                 global $wgOut, $wgRequest;
1304
1305                 # This code desperately needs to be totally rewritten
1306
1307                 # Check permissions
1308                 $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $this->getContext()->getUser() );
1309                 if ( count( $permission_errors ) ) {
1310                         throw new PermissionsError( 'delete', $permission_errors );
1311                 }
1312
1313                 # Read-only check...
1314                 if ( wfReadOnly() ) {
1315                         throw new ReadOnlyError;
1316                 }
1317
1318                 $confirm = $wgRequest->wasPosted() &&
1319                                 $this->getContext()->getUser()->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1320
1321                 $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
1322                 $this->DeleteReason = $wgRequest->getText( 'wpReason' );
1323
1324                 $reason = $this->DeleteReasonList;
1325
1326                 if ( $reason != 'other' && $this->DeleteReason != '' ) {
1327                         // Entry from drop down menu + additional comment
1328                         $reason .= wfMsgForContent( 'colon-separator' ) . $this->DeleteReason;
1329                 } elseif ( $reason == 'other' ) {
1330                         $reason = $this->DeleteReason;
1331                 }
1332
1333                 # Flag to hide all contents of the archived revisions
1334                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $this->getContext()->getUser()->isAllowed( 'suppressrevision' );
1335
1336                 $wgOut->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1337
1338                 # Better double-check that it hasn't been deleted yet!
1339                 $dbw = wfGetDB( DB_MASTER );
1340                 $conds = $this->getTitle()->pageCond();
1341                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1342                 if ( $latest === false ) {
1343                         $wgOut->showFatalError(
1344                                 Html::rawElement(
1345                                         'div',
1346                                         array( 'class' => 'error mw-error-cannotdelete' ),
1347                                         wfMsgExt( 'cannotdelete', array( 'parse' ),
1348                                                 wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1349                                 )
1350                         );
1351                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1352                         LogEventsList::showLogExtract(
1353                                 $wgOut,
1354                                 'delete',
1355                                 $this->getTitle()->getPrefixedText()
1356                         );
1357
1358                         return;
1359                 }
1360
1361                 # Hack for big sites
1362                 $bigHistory = $this->mPage->isBigDeletion();
1363                 if ( $bigHistory && !$this->getTitle()->userCan( 'bigdelete' ) ) {
1364                         global $wgLang, $wgDeleteRevisionsLimit;
1365
1366                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1367                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1368
1369                         return;
1370                 }
1371
1372                 if ( $confirm ) {
1373                         $this->doDelete( $reason, $suppress );
1374
1375                         if ( $wgRequest->getCheck( 'wpWatch' ) && $this->getContext()->getUser()->isLoggedIn() ) {
1376                                 $this->doWatch();
1377                         } elseif ( $this->getTitle()->userIsWatching() ) {
1378                                 $this->doUnwatch();
1379                         }
1380
1381                         return;
1382                 }
1383
1384                 // Generate deletion reason
1385                 $hasHistory = false;
1386                 if ( !$reason ) {
1387                         $reason = $this->generateReason( $hasHistory );
1388                 }
1389
1390                 // If the page has a history, insert a warning
1391                 if ( $hasHistory && !$confirm ) {
1392                         global $wgLang;
1393
1394                         $revisions = $this->mPage->estimateRevisionCount();
1395                         // @todo FIXME: i18n issue/patchwork message
1396                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
1397                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
1398                                 wfMsgHtml( 'word-separator' ) . Linker::link( $this->getTitle(),
1399                                         wfMsgHtml( 'history' ),
1400                                         array( 'rel' => 'archives' ),
1401                                         array( 'action' => 'history' ) ) .
1402                                 '</strong>'
1403                         );
1404
1405                         if ( $bigHistory ) {
1406                                 global $wgDeleteRevisionsLimit;
1407                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1408                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
1409                         }
1410                 }
1411
1412                 return $this->confirmDelete( $reason );
1413         }
1414
1415         /**
1416          * Output deletion confirmation dialog
1417          * @todo FIXME: Move to another file?
1418          * @param $reason String: prefilled reason
1419          */
1420         public function confirmDelete( $reason ) {
1421                 global $wgOut;
1422
1423                 wfDebug( "Article::confirmDelete\n" );
1424
1425                 $deleteBackLink = Linker::linkKnown( $this->getTitle() );
1426                 $wgOut->setSubtitle( wfMsgHtml( 'delete-backlink', $deleteBackLink ) );
1427                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1428                 $wgOut->addWikiMsg( 'confirmdeletetext' );
1429
1430                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
1431
1432                 if ( $this->getContext()->getUser()->isAllowed( 'suppressrevision' ) ) {
1433                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1434                                         <td></td>
1435                                         <td class='mw-input'><strong>" .
1436                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
1437                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1438                                         "</strong></td>
1439                                 </tr>";
1440                 } else {
1441                         $suppress = '';
1442                 }
1443                 $checkWatch = $this->getContext()->getUser()->getBoolOption( 'watchdeletion' ) || $this->getTitle()->userIsWatching();
1444
1445                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1446                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1447                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1448                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
1449                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1450                         "<tr id=\"wpDeleteReasonListRow\">
1451                                 <td class='mw-label'>" .
1452                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
1453                                 "</td>
1454                                 <td class='mw-input'>" .
1455                                         Xml::listDropDown( 'wpDeleteReasonList',
1456                                                 wfMsgForContent( 'deletereason-dropdown' ),
1457                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
1458                                 "</td>
1459                         </tr>
1460                         <tr id=\"wpDeleteReasonRow\">
1461                                 <td class='mw-label'>" .
1462                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
1463                                 "</td>
1464                                 <td class='mw-input'>" .
1465                                 Html::input( 'wpReason', $reason, 'text', array(
1466                                         'size' => '60',
1467                                         'maxlength' => '255',
1468                                         'tabindex' => '2',
1469                                         'id' => 'wpReason',
1470                                         'autofocus'
1471                                 ) ) .
1472                                 "</td>
1473                         </tr>";
1474
1475                 # Disallow watching if user is not logged in
1476                 if ( $this->getContext()->getUser()->isLoggedIn() ) {
1477                         $form .= "
1478                         <tr>
1479                                 <td></td>
1480                                 <td class='mw-input'>" .
1481                                         Xml::checkLabel( wfMsg( 'watchthis' ),
1482                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1483                                 "</td>
1484                         </tr>";
1485                 }
1486
1487                 $form .= "
1488                         $suppress
1489                         <tr>
1490                                 <td></td>
1491                                 <td class='mw-submit'>" .
1492                                         Xml::submitButton( wfMsg( 'deletepage' ),
1493                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1494                                 "</td>
1495                         </tr>" .
1496                         Xml::closeElement( 'table' ) .
1497                         Xml::closeElement( 'fieldset' ) .
1498                         Html::hidden( 'wpEditToken', $this->getContext()->getUser()->editToken() ) .
1499                         Xml::closeElement( 'form' );
1500
1501                         if ( $this->getContext()->getUser()->isAllowed( 'editinterface' ) ) {
1502                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1503                                 $link = Linker::link(
1504                                         $title,
1505                                         wfMsgHtml( 'delete-edit-reasonlist' ),
1506                                         array(),
1507                                         array( 'action' => 'edit' )
1508                                 );
1509                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1510                         }
1511
1512                 $wgOut->addHTML( $form );
1513                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1514                 LogEventsList::showLogExtract( $wgOut, 'delete',
1515                         $this->getTitle()->getPrefixedText()
1516                 );
1517         }
1518
1519         /**
1520          * Perform a deletion and output success or failure messages
1521          * @param $reason
1522          * @param $suppress bool
1523          */
1524         public function doDelete( $reason, $suppress = false ) {
1525                 global $wgOut;
1526
1527                 $id = $this->getTitle()->getArticleID( Title::GAID_FOR_UPDATE );
1528
1529                 $error = '';
1530                 if ( $this->mPage->doDeleteArticle( $reason, $suppress, $id, $error ) ) {
1531                         $deleted = $this->getTitle()->getPrefixedText();
1532
1533                         $wgOut->setPageTitle( wfMessage( 'actioncomplete' ) );
1534                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1535
1536                         $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
1537
1538                         $wgOut->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1539                         $wgOut->returnToMain( false );
1540                 } else {
1541                         if ( $error == '' ) {
1542                                 $wgOut->showFatalError(
1543                                         Html::rawElement(
1544                                                 'div',
1545                                                 array( 'class' => 'error mw-error-cannotdelete' ),
1546                                                 wfMsgExt( 'cannotdelete', array( 'parse' ),
1547                                                         wfEscapeWikiText( $this->getTitle()->getPrefixedText() ) )
1548                                         )
1549                                 );
1550
1551                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
1552
1553                                 LogEventsList::showLogExtract(
1554                                         $wgOut,
1555                                         'delete',
1556                                         $this->getTitle()->getPrefixedText()
1557                                 );
1558                         } else {
1559                                 $wgOut->showFatalError( $error );
1560                         }
1561                 }
1562         }
1563
1564         /**
1565          * Generate the navigation links when browsing through an article revisions
1566          * It shows the information as:
1567          *   Revision as of \<date\>; view current revision
1568          *   \<- Previous version | Next Version -\>
1569          *
1570          * @param $oldid String: revision ID of this article revision
1571          */
1572         public function setOldSubtitle( $oldid = 0 ) {
1573                 global $wgLang, $wgOut, $wgUser, $wgRequest;
1574
1575                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1576                         return;
1577                 }
1578
1579                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1580
1581                 # Cascade unhide param in links for easy deletion browsing
1582                 $extraParams = array();
1583                 if ( $wgRequest->getVal( 'unhide' ) ) {
1584                         $extraParams['unhide'] = 1;
1585                 }
1586
1587                 $revision = Revision::newFromId( $oldid );
1588                 $timestamp = $revision->getTimestamp();
1589
1590                 $current = ( $oldid == $this->mPage->getLatest() );
1591                 $td = $wgLang->timeanddate( $timestamp, true );
1592                 $tddate = $wgLang->date( $timestamp, true );
1593                 $tdtime = $wgLang->time( $timestamp, true );
1594
1595                 $lnk = $current
1596                         ? wfMsgHtml( 'currentrevisionlink' )
1597                         : Linker::link(
1598                                 $this->getTitle(),
1599                                 wfMsgHtml( 'currentrevisionlink' ),
1600                                 array(),
1601                                 $extraParams,
1602                                 array( 'known', 'noclasses' )
1603                         );
1604                 $curdiff = $current
1605                         ? wfMsgHtml( 'diff' )
1606                         : Linker::link(
1607                                 $this->getTitle(),
1608                                 wfMsgHtml( 'diff' ),
1609                                 array(),
1610                                 array(
1611                                         'diff' => 'cur',
1612                                         'oldid' => $oldid
1613                                 ) + $extraParams,
1614                                 array( 'known', 'noclasses' )
1615                         );
1616                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid ) ;
1617                 $prevlink = $prev
1618                         ? Linker::link(
1619                                 $this->getTitle(),
1620                                 wfMsgHtml( 'previousrevision' ),
1621                                 array(),
1622                                 array(
1623                                         'direction' => 'prev',
1624                                         'oldid' => $oldid
1625                                 ) + $extraParams,
1626                                 array( 'known', 'noclasses' )
1627                         )
1628                         : wfMsgHtml( 'previousrevision' );
1629                 $prevdiff = $prev
1630                         ? Linker::link(
1631                                 $this->getTitle(),
1632                                 wfMsgHtml( 'diff' ),
1633                                 array(),
1634                                 array(
1635                                         'diff' => 'prev',
1636                                         'oldid' => $oldid
1637                                 ) + $extraParams,
1638                                 array( 'known', 'noclasses' )
1639                         )
1640                         : wfMsgHtml( 'diff' );
1641                 $nextlink = $current
1642                         ? wfMsgHtml( 'nextrevision' )
1643                         : Linker::link(
1644                                 $this->getTitle(),
1645                                 wfMsgHtml( 'nextrevision' ),
1646                                 array(),
1647                                 array(
1648                                         'direction' => 'next',
1649                                         'oldid' => $oldid
1650                                 ) + $extraParams,
1651                                 array( 'known', 'noclasses' )
1652                         );
1653                 $nextdiff = $current
1654                         ? wfMsgHtml( 'diff' )
1655                         : Linker::link(
1656                                 $this->getTitle(),
1657                                 wfMsgHtml( 'diff' ),
1658                                 array(),
1659                                 array(
1660                                         'diff' => 'next',
1661                                         'oldid' => $oldid
1662                                 ) + $extraParams,
1663                                 array( 'known', 'noclasses' )
1664                         );
1665
1666                 $cdel = '';
1667
1668                 // User can delete revisions or view deleted revisions...
1669                 $canHide = $wgUser->isAllowed( 'deleterevision' );
1670                 if ( $canHide || ( $revision->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
1671                         if ( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
1672                                 $cdel = Linker::revDeleteLinkDisabled( $canHide ); // rev was hidden from Sysops
1673                         } else {
1674                                 $query = array(
1675                                         'type'   => 'revision',
1676                                         'target' => $this->getTitle()->getPrefixedDbkey(),
1677                                         'ids'    => $oldid
1678                                 );
1679                                 $cdel = Linker::revDeleteLink( $query, $revision->isDeleted( File::DELETED_RESTRICTED ), $canHide );
1680                         }
1681                         $cdel .= ' ';
1682                 }
1683
1684                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1685                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1686
1687                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1688                         ? 'revision-info-current'
1689                         : 'revision-info';
1690
1691                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" .
1692                         wfMsgExt(
1693                                 $infomsg,
1694                                 array( 'parseinline', 'replaceafter' ),
1695                                 $td,
1696                                 $userlinks,
1697                                 $revision->getID(),
1698                                 $tddate,
1699                                 $tdtime,
1700                                 $revision->getUser()
1701                         ) .
1702                         "</div>\n" .
1703                         "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
1704                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
1705
1706                 $wgOut->setSubtitle( $r );
1707         }
1708
1709         /* Caching functions */
1710
1711         /**
1712          * checkLastModified returns true if it has taken care of all
1713          * output to the client that is necessary for this request.
1714          * (that is, it has sent a cached version of the page)
1715          *
1716          * @return boolean true if cached version send, false otherwise
1717          */
1718         protected function tryFileCache() {
1719                 static $called = false;
1720
1721                 if ( $called ) {
1722                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1723                         return false;
1724                 }
1725
1726                 $called = true;
1727                 if ( $this->isFileCacheable() ) {
1728                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1729                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1730                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1731                                 $cache->loadFromFileCache( $this->getContext() );
1732                                 return true;
1733                         } else {
1734                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1735                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1736                         }
1737                 } else {
1738                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1739                 }
1740
1741                 return false;
1742         }
1743
1744         /**
1745          * Check if the page can be cached
1746          * @return bool
1747          */
1748         public function isFileCacheable() {
1749                 $cacheable = false;
1750
1751                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1752                         $cacheable = $this->mPage->getID()
1753                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1754                         // Extension may have reason to disable file caching on some pages.
1755                         if ( $cacheable ) {
1756                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1757                         }
1758                 }
1759
1760                 return $cacheable;
1761         }
1762
1763         /**#@-*/
1764
1765         /**
1766          * Add the primary page-view wikitext to the output buffer
1767          * Saves the text into the parser cache if possible.
1768          * Updates templatelinks if it is out of date.
1769          *
1770          * @param $text String
1771          * @param $cache Boolean
1772          * @param $parserOptions mixed ParserOptions object, or boolean false
1773          */
1774         public function outputWikiText( $text, $cache = true, $parserOptions = false ) {
1775                 global $wgOut;
1776
1777                 $this->mParserOutput = $this->getOutputFromWikitext( $text, $cache, $parserOptions );
1778
1779                 $this->doCascadeProtectionUpdates( $this->mParserOutput );
1780
1781                 $wgOut->addParserOutput( $this->mParserOutput );
1782         }
1783
1784         /**
1785          * Lightweight method to get the parser output for a page, checking the parser cache
1786          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1787          * consider, so it's not appropriate to use there.
1788          *
1789          * @since 1.16 (r52326) for LiquidThreads
1790          *
1791          * @param $oldid mixed integer Revision ID or null
1792          * @param $user User The relevant user
1793          * @return ParserOutput or false if the given revsion ID is not found
1794          */
1795         public function getParserOutput( $oldid = null, User $user = null ) {
1796                 global $wgEnableParserCache, $wgUser;
1797                 $user = is_null( $user ) ? $wgUser : $user;
1798
1799                 wfProfileIn( __METHOD__ );
1800                 // Should the parser cache be used?
1801                 $useParserCache = $wgEnableParserCache &&
1802                         $user->getStubThreshold() == 0 &&
1803                         $this->mPage->exists() &&
1804                         $oldid === null;
1805
1806                 wfDebug( __METHOD__ . ': using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
1807
1808                 if ( $user->getStubThreshold() ) {
1809                         wfIncrStats( 'pcache_miss_stub' );
1810                 }
1811
1812                 if ( $useParserCache ) {
1813                         $options = $this->mPage->makeParserOptions( $user );
1814                         $parserOutput = ParserCache::singleton()->get( $this, $options );
1815                         if ( $parserOutput !== false ) {
1816                                 wfProfileOut( __METHOD__ );
1817                                 return $parserOutput;
1818                         }
1819                 }
1820
1821                 // Cache miss; parse and output it.
1822                 if ( $oldid === null ) {
1823                         $text = $this->mPage->getRawText();
1824                 } else {
1825                         $rev = Revision::newFromTitle( $this->getTitle(), $oldid );
1826                         if ( $rev === null ) {
1827                                 wfProfileOut( __METHOD__ );
1828                                 return false;
1829                         }
1830                         $text = $rev->getText();
1831                 }
1832
1833                 $output = $this->getOutputFromWikitext( $text, $useParserCache );
1834                 wfProfileOut( __METHOD__ );
1835                 return $output;
1836         }
1837
1838         /**
1839          * This does all the heavy lifting for outputWikitext, except it returns the parser
1840          * output instead of sending it straight to $wgOut. Makes things nice and simple for,
1841          * say, embedding thread pages within a discussion system (LiquidThreads)
1842          *
1843          * @param $text string
1844          * @param $cache boolean
1845          * @param $parserOptions parsing options, defaults to false
1846          * @return ParserOutput
1847          */
1848         public function getOutputFromWikitext( $text, $cache = true, $parserOptions = false ) {
1849                 global $wgParser, $wgEnableParserCache, $wgUseFileCache;
1850
1851                 if ( !$parserOptions ) {
1852                         $parserOptions = $this->getParserOptions();
1853                 }
1854
1855                 $time = - wfTime();
1856                 $this->mParserOutput = $wgParser->parse( $text, $this->getTitle(),
1857                         $parserOptions, true, true, $this->getRevIdFetched() );
1858                 $time += wfTime();
1859
1860                 # Timing hack
1861                 if ( $time > 3 ) {
1862                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
1863                                 $this->getTitle()->getPrefixedDBkey() ) );
1864                 }
1865
1866                 if ( $wgEnableParserCache && $cache && $this->mParserOutput->isCacheable() ) {
1867                         $parserCache = ParserCache::singleton();
1868                         $parserCache->save( $this->mParserOutput, $this, $parserOptions );
1869                 }
1870
1871                 // Make sure file cache is not used on uncacheable content.
1872                 // Output that has magic words in it can still use the parser cache
1873                 // (if enabled), though it will generally expire sooner.
1874                 if ( !$this->mParserOutput->isCacheable() || $this->mParserOutput->containsOldMagic() ) {
1875                         $wgUseFileCache = false;
1876                 }
1877
1878                 if ( $this->isCurrent() ) {
1879                         $this->mPage->doCascadeProtectionUpdates( $this->mParserOutput );
1880                 }
1881
1882                 return $this->mParserOutput;
1883         }
1884
1885         /**
1886          * Get parser options suitable for rendering the primary article wikitext
1887          * @return ParserOptions|false
1888          */
1889         public function getParserOptions() {
1890                 global $wgUser;
1891                 if ( !$this->mParserOptions ) {
1892                         $this->mParserOptions = $this->mPage->makeParserOptions( $wgUser );
1893                 }
1894                 // Clone to allow modifications of the return value without affecting cache
1895                 return clone $this->mParserOptions;
1896         }
1897
1898         /**
1899          * Sets the context this Article is executed in
1900          *
1901          * @param $context IContextSource
1902          * @since 1.18
1903          */
1904         public function setContext( $context ) {
1905                 $this->mContext = $context;
1906         }
1907
1908         /**
1909          * Gets the context this Article is executed in
1910          *
1911          * @return IContextSource
1912          * @since 1.18
1913          */
1914         public function getContext() {
1915                 if ( $this->mContext instanceof IContextSource ) {
1916                         return $this->mContext;
1917                 } else {
1918                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1919                         return RequestContext::getMain();
1920                 }
1921         }
1922
1923         /**
1924          * Use PHP's magic __get handler to handle accessing of
1925          * raw WikiPage fields for backwards compatibility.
1926          *
1927          * @param $fname String Field name
1928          */
1929         public function __get( $fname ) {
1930                 if ( property_exists( $this->mPage, $fname ) ) {
1931                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1932                         return $this->mPage->$fname;
1933                 }
1934                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1935         }
1936
1937         /**
1938          * Use PHP's magic __set handler to handle setting of
1939          * raw WikiPage fields for backwards compatibility.
1940          *
1941          * @param $fname String Field name
1942          * @param $fvalue mixed New value
1943          */
1944         public function __set( $fname, $fvalue ) {
1945                 if ( property_exists( $this->mPage, $fname ) ) {
1946                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1947                         $this->mPage->$fname = $fvalue;
1948                 // Note: extensions may want to toss on new fields
1949                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1950                         $this->mPage->$fname = $fvalue;
1951                 } else {
1952                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1953                 }
1954         }
1955
1956         /**
1957          * Use PHP's magic __call handler to transform instance calls to
1958          * WikiPage functions for backwards compatibility.
1959          *
1960          * @param $fname String Name of called method
1961          * @param $args Array Arguments to the method
1962          */
1963         public function __call( $fname, $args ) {
1964                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1965                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1966                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1967                 }
1968                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1969         }
1970
1971         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1972
1973         /**
1974          * @param $limit array
1975          * @param $reason string
1976          * @param $cascade int
1977          * @param $expiry array
1978          * @return bool
1979          */
1980         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1981                 return $this->mPage->updateRestrictions( $limit, $reason, $cascade, $expiry );
1982         }
1983
1984         /**
1985          * @param $reason string
1986          * @param $suppress bool
1987          * @param $id int
1988          * @param $commit bool
1989          * @param $error string
1990          * @return bool
1991          */
1992         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1993                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1994         }
1995
1996         /**
1997          * @param $fromP
1998          * @param $summary
1999          * @param $token
2000          * @param $bot
2001          * @param $resultDetails
2002          * @param $user User
2003          * @return array
2004          */
2005         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2006                 global $wgUser;
2007                 $user = is_null( $user ) ? $wgUser : $user;
2008                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2009         }
2010
2011         /**
2012          * @param $fromP
2013          * @param $summary
2014          * @param $bot
2015          * @param $resultDetails
2016          * @param $guser User
2017          * @return array
2018          */
2019         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2020                 global $wgUser;
2021                 $guser = is_null( $guser ) ? $wgUser : $guser;
2022                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2023         }
2024
2025         /**
2026          * @param $hasHistory bool
2027          * @return mixed
2028          */
2029         public function generateReason( &$hasHistory ) {
2030                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2031         }
2032
2033         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
2034
2035         /**
2036          * @return array
2037          */
2038         public static function selectFields() {
2039                 return WikiPage::selectFields();
2040         }
2041
2042         /**
2043          * @param $title Title
2044          */
2045         public static function onArticleCreate( $title ) {
2046                 WikiPage::onArticleCreate( $title );
2047         }
2048
2049         /**
2050          * @param $title Title
2051          */
2052         public static function onArticleDelete( $title ) {
2053                 WikiPage::onArticleDelete( $title );
2054         }
2055
2056         /**
2057          * @param $title Title
2058          */
2059         public static function onArticleEdit( $title ) {
2060                 WikiPage::onArticleEdit( $title );
2061         }
2062
2063         /**
2064          * @param $oldtext
2065          * @param $newtext
2066          * @param $flags
2067          * @return string
2068          */
2069         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2070                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2071         }
2072         // ******
2073 }
2074
2075 class PoolWorkArticleView extends PoolCounterWork {
2076
2077         /**
2078          * @var Article
2079          */
2080         private $mArticle;
2081
2082         function __construct( $article, $key, $useParserCache, $parserOptions ) {
2083                 parent::__construct( 'ArticleView', $key );
2084                 $this->mArticle = $article;
2085                 $this->cacheable = $useParserCache;
2086                 $this->parserOptions = $parserOptions;
2087         }
2088
2089         /**
2090          * @return bool
2091          */
2092         function doWork() {
2093                 return $this->mArticle->doViewParse();
2094         }
2095
2096         /**
2097          * @return bool
2098          */
2099         function getCachedWork() {
2100                 global $wgOut;
2101
2102                 $parserCache = ParserCache::singleton();
2103                 $this->mArticle->mParserOutput = $parserCache->get( $this->mArticle, $this->parserOptions );
2104
2105                 if ( $this->mArticle->mParserOutput !== false ) {
2106                         wfDebug( __METHOD__ . ": showing contents parsed by someone else\n" );
2107                         $wgOut->addParserOutput( $this->mArticle->mParserOutput );
2108                         # Ensure that UI elements requiring revision ID have
2109                         # the correct version information.
2110                         $wgOut->setRevisionId( $this->mArticle->getLatest() );
2111                         return true;
2112                 }
2113                 return false;
2114         }
2115
2116         /**
2117          * @return bool
2118          */
2119         function fallback() {
2120                 return $this->mArticle->tryDirtyCache();
2121         }
2122
2123         /**
2124          * @param $status Status
2125          */
2126         function error( $status ) {
2127                 global $wgOut;
2128
2129                 $wgOut->clearHTML(); // for release() errors
2130                 $wgOut->enableClientCache( false );
2131                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2132
2133                 $errortext = $status->getWikiText( false, 'view-pool-error' );
2134                 $wgOut->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
2135
2136                 return false;
2137         }
2138 }