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