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