includes/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki article and history.
  25  *
  26  * This maintains WikiPage functions for backwards compatibility.
  27  *
  28  * @todo move and rewrite code to an Action class
  29  *
  30  * See design.txt for an overview.
  31  * Note: edit user interface and cache support functions have been
  32  * moved to separate EditPage and HTMLFileCache classes.
  33  *
  34  * @internal documentation reviewed 15 Mar 2010
  35  */
  36 class Article implements Page {
  37         /**@{{
  38          * @private
  39          */
  40
  41         /**
  42          * The context this Article is executed in
  43          * @var IContextSource $mContext
  44          */
  45         protected $mContext;
  46
  47         /**
  48          * The WikiPage object of this instance
  49          * @var WikiPage $mPage
  50          */
  51         protected $mPage;
  52
  53         /**
  54          * ParserOptions object for $wgUser articles
  55          * @var ParserOptions $mParserOptions
  56          */
  57         public $mParserOptions;
  58
  59         /**
  60          * Text of the revision we are working on
  61          * @var string $mContent
  62          */
  63         var $mContent;                    // !< #BC cruft
  64
  65         /**
  66          * Content of the revision we are working on
  67          * @var Content
  68          * @since 1.21
  69          */
  70         var $mContentObject;              // !<
  71
  72         /**
  73          * Is the content ($mContent) already loaded?
  74          * @var bool $mContentLoaded
  75          */
  76         var $mContentLoaded = false;      // !<
  77
  78         /**
  79          * The oldid of the article that is to be shown, 0 for the
  80          * current revision
  81          * @var int|null $mOldId
  82          */
  83         var $mOldId;                      // !<
  84
  85         /**
  86          * Title from which we were redirected here
  87          * @var Title $mRedirectedFrom
  88          */
  89         var $mRedirectedFrom = null;
  90
  91         /**
  92          * URL to redirect to or false if none
  93          * @var string|false $mRedirectUrl
  94          */
  95         var $mRedirectUrl = false;        // !<
  96
  97         /**
  98          * Revision ID of revision we are working on
  99          * @var int $mRevIdFetched
 100          */
 101         var $mRevIdFetched = 0;           // !<
 102
 103         /**
 104          * Revision we are working on
 105          * @var Revision $mRevision
 106          */
 107         var $mRevision = null;
 108
 109         /**
 110          * ParserOutput object
 111          * @var ParserOutput $mParserOutput
 112          */
 113         var $mParserOutput;
 114
 115         /**@}}*/
 116
 117         /**
 118          * Constructor and clear the article
 119          * @param $title Title Reference to a Title object.
 120          * @param $oldId Integer revision ID, null to fetch from request, zero for current
 121          */
 122         public function __construct( Title $title, $oldId = null ) {
 123                 $this->mOldId = $oldId;
 124                 $this->mPage = $this->newPage( $title );
 125         }
 126
 127         /**
 128          * @param $title Title
 129          * @return WikiPage
 130          */
 131         protected function newPage( Title $title ) {
 132                 return new WikiPage( $title );
 133         }
 134
 135         /**
 136          * Constructor from a page id
 137          * @param int $id article ID to load
 138          * @return Article|null
 139          */
 140         public static function newFromID( $id ) {
 141                 $t = Title::newFromID( $id );
 142                 # @todo FIXME: Doesn't inherit right
 143                 return $t == null ? null : new self( $t );
 144                 # return $t == null ? null : new static( $t ); // PHP 5.3
 145         }
 146
 147         /**
 148          * Create an Article object of the appropriate class for the given page.
 149          *
 150          * @param $title Title
 151          * @param $context IContextSource
 152          * @return Article object
 153          */
 154         public static function newFromTitle( $title, IContextSource $context ) {
 155                 if ( NS_MEDIA == $title->getNamespace() ) {
 156                         // FIXME: where should this go?
 157                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 158                 }
 159
 160                 $page = null;
 161                 wfRunHooks( 'ArticleFromTitle', array( &$title, &$page ) );
 162                 if ( !$page ) {
 163                         switch ( $title->getNamespace() ) {
 164                                 case NS_FILE:
 165                                         $page = new ImagePage( $title );
 166                                         break;
 167                                 case NS_CATEGORY:
 168                                         $page = new CategoryPage( $title );
 169                                         break;
 170                                 default:
 171                                         $page = new Article( $title );
 172                         }
 173                 }
 174                 $page->setContext( $context );
 175
 176                 return $page;
 177         }
 178
 179         /**
 180          * Create an Article object of the appropriate class for the given page.
 181          *
 182          * @param $page WikiPage
 183          * @param $context IContextSource
 184          * @return Article object
 185          */
 186         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 187                 $article = self::newFromTitle( $page->getTitle(), $context );
 188                 $article->mPage = $page; // override to keep process cached vars
 189                 return $article;
 190         }
 191
 192         /**
 193          * Tell the page view functions that this view was redirected
 194          * from another page on the wiki.
 195          * @param $from Title object.
 196          */
 197         public function setRedirectedFrom( Title $from ) {
 198                 $this->mRedirectedFrom = $from;
 199         }
 200
 201         /**
 202          * Get the title object of the article
 203          *
 204          * @return Title object of this page
 205          */
 206         public function getTitle() {
 207                 return $this->mPage->getTitle();
 208         }
 209
 210         /**
 211          * Get the WikiPage object of this instance
 212          *
 213          * @since 1.19
 214          * @return WikiPage
 215          */
 216         public function getPage() {
 217                 return $this->mPage;
 218         }
 219
 220         /**
 221          * Clear the object
 222          */
 223         public function clear() {
 224                 $this->mContentLoaded = false;
 225
 226                 $this->mRedirectedFrom = null; # Title object if set
 227                 $this->mRevIdFetched = 0;
 228                 $this->mRedirectUrl = false;
 229
 230                 $this->mPage->clear();
 231         }
 232
 233         /**
 234          * Note that getContent/loadContent do not follow redirects anymore.
 235          * If you need to fetch redirectable content easily, try
 236          * the shortcut in WikiPage::getRedirectTarget()
 237          *
 238          * This function has side effects! Do not use this function if you
 239          * only want the real revision text if any.
 240          *
 241          * @deprecated in 1.21; use WikiPage::getContent() instead
 242          *
 243          * @return string Return the text of this revision
 244          */
 245         public function getContent() {
 246                 ContentHandler::deprecated( __METHOD__, '1.21' );
 247                 $content = $this->getContentObject();
 248                 return ContentHandler::getContentText( $content );
 249         }
 250
 251         /**
 252          * Returns a Content object representing the pages effective display content,
 253          * not necessarily the revision's content!
 254          *
 255          * Note that getContent/loadContent do not follow redirects anymore.
 256          * If you need to fetch redirectable content easily, try
 257          * the shortcut in WikiPage::getRedirectTarget()
 258          *
 259          * This function has side effects! Do not use this function if you
 260          * only want the real revision text if any.
 261          *
 262          * @return Content Return the content of this revision
 263          *
 264          * @since 1.21
 265          */
 266         protected function getContentObject() {
 267                 wfProfileIn( __METHOD__ );
 268
 269                 if ( $this->mPage->getID() === 0 ) {
 270                         # If this is a MediaWiki:x message, then load the messages
 271                         # and return the message value for x.
 272                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 273                                 $text = $this->getTitle()->getDefaultMessageText();
 274                                 if ( $text === false ) {
 275                                         $text = '';
 276                                 }
 277
 278                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 279                         } else {
 280                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 281                                 $content = new MessageContent( $message, null, 'parsemag' );
 282                         }
 283                 } else {
 284                         $this->fetchContentObject();
 285                         $content = $this->mContentObject;
 286                 }
 287
 288                 wfProfileOut( __METHOD__ );
 289                 return $content;
 290         }
 291
 292         /**
 293          * @return int The oldid of the article that is to be shown, 0 for the
 294          *             current revision
 295          */
 296         public function getOldID() {
 297                 if ( is_null( $this->mOldId ) ) {
 298                         $this->mOldId = $this->getOldIDFromRequest();
 299                 }
 300
 301                 return $this->mOldId;
 302         }
 303
 304         /**
 305          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 306          *
 307          * @return int The old id for the request
 308          */
 309         public function getOldIDFromRequest() {
 310                 $this->mRedirectUrl = false;
 311
 312                 $request = $this->getContext()->getRequest();
 313                 $oldid = $request->getIntOrNull( 'oldid' );
 314
 315                 if ( $oldid === null ) {
 316                         return 0;
 317                 }
 318
 319                 if ( $oldid !== 0 ) {
 320                         # Load the given revision and check whether the page is another one.
 321                         # In that case, update this instance to reflect the change.
 322                         if ( $oldid === $this->mPage->getLatest() ) {
 323                                 $this->mRevision = $this->mPage->getRevision();
 324                         } else {
 325                                 $this->mRevision = Revision::newFromId( $oldid );
 326                                 if ( $this->mRevision !== null ) {
 327                                         // Revision title doesn't match the page title given?
 328                                         if ( $this->mPage->getID() != $this->mRevision->getPage() ) {
 329                                                 $function = array( get_class( $this->mPage ), 'newFromID' );
 330                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 331                                         }
 332                                 }
 333                         }
 334                 }
 335
 336                 if ( $request->getVal( 'direction' ) == 'next' ) {
 337                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 338                         if ( $nextid ) {
 339                                 $oldid = $nextid;
 340                                 $this->mRevision = null;
 341                         } else {
 342                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 343                         }
 344                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 345                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 346                         if ( $previd ) {
 347                                 $oldid = $previd;
 348                                 $this->mRevision = null;
 349                         }
 350                 }
 351
 352                 return $oldid;
 353         }
 354
 355         /**
 356          * Load the revision (including text) into this object
 357          *
 358          * @deprecated in 1.19; use fetchContent()
 359          */
 360         function loadContent() {
 361                 wfDeprecated( __METHOD__, '1.19' );
 362                 $this->fetchContent();
 363         }
 364
 365         /**
 366          * Get text of an article from database
 367          * Does *NOT* follow redirects.
 368          *
 369          * @protected
 370          * @note this is really internal functionality that should really NOT be used by other functions. For accessing
 371          *       article content, use the WikiPage class, especially WikiBase::getContent(). However, a lot of legacy code
 372          *       uses this method to retrieve page text from the database, so the function has to remain public for now.
 373          *
 374          * @return mixed string containing article contents, or false if null
 375          * @deprecated in 1.21, use WikiPage::getContent() instead
 376          */
 377         function fetchContent() { #BC cruft!
 378                 ContentHandler::deprecated( __METHOD__, '1.21' );
 379
 380                 if ( $this->mContentLoaded && $this->mContent ) {
 381                         return $this->mContent;
 382                 }
 383
 384                 wfProfileIn( __METHOD__ );
 385
 386                 $content = $this->fetchContentObject();
 387
 388                 $this->mContent = ContentHandler::getContentText( $content ); #@todo: get rid of mContent everywhere!
 389                 ContentHandler::runLegacyHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) );
 390
 391                 wfProfileOut( __METHOD__ );
 392
 393                 return $this->mContent;
 394         }
 395
 396         /**
 397          * Get text content object
 398          * Does *NOT* follow redirects.
 399          * TODO: when is this null?
 400          *
 401          * @note code that wants to retrieve page content from the database should use WikiPage::getContent().
 402          *
 403          * @return Content|null|boolean false
 404          *
 405          * @since 1.21
 406          */
 407         protected function fetchContentObject() {
 408                 if ( $this->mContentLoaded ) {
 409                         return $this->mContentObject;
 410                 }
 411
 412                 wfProfileIn( __METHOD__ );
 413
 414                 $this->mContentLoaded = true;
 415                 $this->mContent = null;
 416
 417                 $oldid = $this->getOldID();
 418
 419                 # Pre-fill content with error message so that if something
 420                 # fails we'll have something telling us what we intended.
 421                 //XXX: this isn't page content but a UI message. horrible.
 422                 $this->mContentObject = new MessageContent( 'missing-revision', array( $oldid ), array() );
 423
 424                 if ( $oldid ) {
 425                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 426                         if ( !$this->mRevision ) {
 427                                 $this->mRevision = Revision::newFromId( $oldid );
 428                                 if ( !$this->mRevision ) {
 429                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 430                                         wfProfileOut( __METHOD__ );
 431                                         return false;
 432                                 }
 433                         }
 434                 } else {
 435                         if ( !$this->mPage->getLatest() ) {
 436                                 wfDebug( __METHOD__ . " failed to find page data for title " . $this->getTitle()->getPrefixedText() . "\n" );
 437                                 wfProfileOut( __METHOD__ );
 438                                 return false;
 439                         }
 440
 441                         $this->mRevision = $this->mPage->getRevision();
 442
 443                         if ( !$this->mRevision ) {
 444                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id " . $this->mPage->getLatest() . "\n" );
 445                                 wfProfileOut( __METHOD__ );
 446                                 return false;
 447                         }
 448                 }
 449
 450                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 451                 // We should instead work with the Revision object when we need it...
 452                 $this->mContentObject = $this->mRevision->getContent( Revision::FOR_THIS_USER, $this->getContext()->getUser() ); // Loads if user is allowed
 453                 $this->mRevIdFetched = $this->mRevision->getId();
 454
 455                 wfRunHooks( 'ArticleAfterFetchContentObject', array( &$this, &$this->mContentObject ) );
 456
 457                 wfProfileOut( __METHOD__ );
 458
 459                 return $this->mContentObject;
 460         }
 461
 462         /**
 463          * No-op
 464          * @deprecated since 1.18
 465          */
 466         public function forUpdate() {
 467                 wfDeprecated( __METHOD__, '1.18' );
 468         }
 469
 470         /**
 471          * Returns true if the currently-referenced revision is the current edit
 472          * to this page (and it exists).
 473          * @return bool
 474          */
 475         public function isCurrent() {
 476                 # If no oldid, this is the current version.
 477                 if ( $this->getOldID() == 0 ) {
 478                         return true;
 479                 }
 480
 481                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 482         }
 483
 484         /**
 485          * Get the fetched Revision object depending on request parameters or null
 486          * on failure.
 487          *
 488          * @since 1.19
 489          * @return Revision|null
 490          */
 491         public function getRevisionFetched() {
 492                 $this->fetchContentObject();
 493
 494                 return $this->mRevision;
 495         }
 496
 497         /**
 498          * Use this to fetch the rev ID used on page views
 499          *
 500          * @return int revision ID of last article revision
 501          */
 502         public function getRevIdFetched() {
 503                 if ( $this->mRevIdFetched ) {
 504                         return $this->mRevIdFetched;
 505                 } else {
 506                         return $this->mPage->getLatest();
 507                 }
 508         }
 509
 510         /**
 511          * This is the default action of the index.php entry point: just view the
 512          * page of the given title.
 513          */
 514         public function view() {
 515                 global $wgUseFileCache, $wgUseETag, $wgDebugToolbar;
 516
 517                 wfProfileIn( __METHOD__ );
 518
 519                 # Get variables from query string
 520                 # As side effect this will load the revision and update the title
 521                 # in a revision ID is passed in the request, so this should remain
 522                 # the first call of this method even if $oldid is used way below.
 523                 $oldid = $this->getOldID();
 524
 525                 $user = $this->getContext()->getUser();
 526                 # Another whitelist check in case getOldID() is altering the title
 527                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 528                 if ( count( $permErrors ) ) {
 529                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 530                         wfProfileOut( __METHOD__ );
 531                         throw new PermissionsError( 'read', $permErrors );
 532                 }
 533
 534                 $outputPage = $this->getContext()->getOutput();
 535                 # getOldID() may as well want us to redirect somewhere else
 536                 if ( $this->mRedirectUrl ) {
 537                         $outputPage->redirect( $this->mRedirectUrl );
 538                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 539                         wfProfileOut( __METHOD__ );
 540
 541                         return;
 542                 }
 543
 544                 # If we got diff in the query, we want to see a diff page instead of the article.
 545                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 546                         wfDebug( __METHOD__ . ": showing diff page\n" );
 547                         $this->showDiffPage();
 548                         wfProfileOut( __METHOD__ );
 549
 550                         return;
 551                 }
 552
 553                 # Set page title (may be overridden by DISPLAYTITLE)
 554                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 555
 556                 $outputPage->setArticleFlag( true );
 557                 # Allow frames by default
 558                 $outputPage->allowClickjacking();
 559
 560                 $parserCache = ParserCache::singleton();
 561
 562                 $parserOptions = $this->getParserOptions();
 563                 # Render printable version, use printable version cache
 564                 if ( $outputPage->isPrintable() ) {
 565                         $parserOptions->setIsPrintable( true );
 566                         $parserOptions->setEditSection( false );
 567                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 568                         $parserOptions->setEditSection( false );
 569                 }
 570
 571                 # Try client and file cache
 572                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 573                         if ( $wgUseETag ) {
 574                                 $outputPage->setETag( $parserCache->getETag( $this, $parserOptions ) );
 575                         }
 576
 577                         # Is it client cached?
 578                         if ( $outputPage->checkLastModified( $this->mPage->getTouched() ) ) {
 579                                 wfDebug( __METHOD__ . ": done 304\n" );
 580                                 wfProfileOut( __METHOD__ );
 581
 582                                 return;
 583                         # Try file cache
 584                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 585                                 wfDebug( __METHOD__ . ": done file cache\n" );
 586                                 # tell wgOut that output is taken care of
 587                                 $outputPage->disable();
 588                                 $this->mPage->doViewUpdates( $user );
 589                                 wfProfileOut( __METHOD__ );
 590
 591                                 return;
 592                         }
 593                 }
 594
 595                 # Should the parser cache be used?
 596                 $useParserCache = $this->mPage->isParserCacheUsed( $parserOptions, $oldid );
 597                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 598                 if ( $user->getStubThreshold() ) {
 599                         wfIncrStats( 'pcache_miss_stub' );
 600                 }
 601
 602                 $this->showRedirectedFromHeader();
 603                 $this->showNamespaceHeader();
 604
 605                 # Iterate through the possible ways of constructing the output text.
 606                 # Keep going until $outputDone is set, or we run out of things to do.
 607                 $pass = 0;
 608                 $outputDone = false;
 609                 $this->mParserOutput = false;
 610
 611                 while ( !$outputDone && ++$pass ) {
 612                         switch ( $pass ) {
 613                                 case 1:
 614                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 615                                         break;
 616                                 case 2:
 617                                         # Early abort if the page doesn't exist
 618                                         if ( !$this->mPage->exists() ) {
 619                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 620                                                 $this->showMissingArticle();
 621                                                 wfProfileOut( __METHOD__ );
 622                                                 return;
 623                                         }
 624
 625                                         # Try the parser cache
 626                                         if ( $useParserCache ) {
 627                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 628
 629                                                 if ( $this->mParserOutput !== false ) {
 630                                                         if ( $oldid ) {
 631                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 632                                                                 $this->setOldSubtitle( $oldid );
 633                                                         } else {
 634                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 635                                                         }
 636                                                         $outputPage->addParserOutput( $this->mParserOutput );
 637                                                         # Ensure that UI elements requiring revision ID have
 638                                                         # the correct version information.
 639                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 640                                                         # Preload timestamp to avoid a DB hit
 641                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 642                                                         if ( $cachedTimestamp !== null ) {
 643                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 644                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 645                                                         }
 646                                                         $outputDone = true;
 647                                                 }
 648                                         }
 649                                         break;
 650                                 case 3:
 651                                         # This will set $this->mRevision if needed
 652                                         $this->fetchContentObject();
 653
 654                                         # Are we looking at an old revision
 655                                         if ( $oldid && $this->mRevision ) {
 656                                                 $this->setOldSubtitle( $oldid );
 657
 658                                                 if ( !$this->showDeletedRevisionHeader() ) {
 659                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 660                                                         wfProfileOut( __METHOD__ );
 661                                                         return;
 662                                                 }
 663                                         }
 664
 665                                         # Ensure that UI elements requiring revision ID have
 666                                         # the correct version information.
 667                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 668                                         # Preload timestamp to avoid a DB hit
 669                                         $outputPage->setRevisionTimestamp( $this->getTimestamp() );
 670
 671                                         # Pages containing custom CSS or JavaScript get special treatment
 672                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 673                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 674                                                 $this->showCssOrJsPage();
 675                                                 $outputDone = true;
 676                                         } elseif ( !wfRunHooks( 'ArticleContentViewCustom',
 677                                                         array( $this->fetchContentObject(), $this->getTitle(), $outputPage ) ) ) {
 678
 679                                                 # Allow extensions do their own custom view for certain pages
 680                                                 $outputDone = true;
 681                                         } elseif ( !ContentHandler::runLegacyHooks( 'ArticleViewCustom',
 682                                                         array( $this->fetchContentObject(), $this->getTitle(), $outputPage ) ) ) {
 683
 684                                                 # Allow extensions do their own custom view for certain pages
 685                                                 $outputDone = true;
 686                                         } else {
 687                                                 $content = $this->getContentObject();
 688                                                 $rt = $content ? $content->getRedirectChain() : null;
 689                                                 if ( $rt ) {
 690                                                         wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 691                                                         # Viewing a redirect page (e.g. with parameter redirect=no)
 692                                                         $outputPage->addHTML( $this->viewRedirect( $rt ) );
 693                                                         # Parse just to get categories, displaytitle, etc.
 694                                                         $this->mParserOutput = $content->getParserOutput( $this->getTitle(), $oldid, $parserOptions, false );
 695                                                         $outputPage->addParserOutputNoText( $this->mParserOutput );
 696                                                         $outputDone = true;
 697                                                 }
 698                                         }
 699                                         break;
 700                                 case 4:
 701                                         # Run the parse, protected by a pool counter
 702                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 703
 704                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 705                                                 $this->getRevIdFetched(), $useParserCache, $this->getContentObject() );
 706
 707                                         if ( !$poolArticleView->execute() ) {
 708                                                 $error = $poolArticleView->getError();
 709                                                 if ( $error ) {
 710                                                         $outputPage->clearHTML(); // for release() errors
 711                                                         $outputPage->enableClientCache( false );
 712                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 713
 714                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 715                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 716                                                 }
 717                                                 # Connection or timeout error
 718                                                 wfProfileOut( __METHOD__ );
 719                                                 return;
 720                                         }
 721
 722                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 723                                         $outputPage->addParserOutput( $this->mParserOutput );
 724
 725                                         # Don't cache a dirty ParserOutput object
 726                                         if ( $poolArticleView->getIsDirty() ) {
 727                                                 $outputPage->setSquidMaxage( 0 );
 728                                                 $outputPage->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
 729                                         }
 730
 731                                         $outputDone = true;
 732                                         break;
 733                                 # Should be unreachable, but just in case...
 734                                 default:
 735                                         break 2;
 736                         }
 737                 }
 738
 739                 # Get the ParserOutput actually *displayed* here.
 740                 # Note that $this->mParserOutput is the *current* version output.
 741                 $pOutput = ( $outputDone instanceof ParserOutput )
 742                         ? $outputDone // object fetched by hook
 743                         : $this->mParserOutput;
 744
 745                 # Adjust title for main page & pages with displaytitle
 746                 if ( $pOutput ) {
 747                         $this->adjustDisplayTitle( $pOutput );
 748                 }
 749
 750                 # For the main page, overwrite the <title> element with the con-
 751                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 752                 # that's not empty).
 753                 # This message always exists because it is in the i18n files
 754                 if ( $this->getTitle()->isMainPage() ) {
 755                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 756                         if ( !$msg->isDisabled() ) {
 757                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 758                         }
 759                 }
 760
 761                 # Check for any __NOINDEX__ tags on the page using $pOutput
 762                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 763                 $outputPage->setIndexPolicy( $policy['index'] );
 764                 $outputPage->setFollowPolicy( $policy['follow'] );
 765
 766                 $this->showViewFooter();
 767                 $this->mPage->doViewUpdates( $user );
 768
 769                 $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 770
 771                 wfProfileOut( __METHOD__ );
 772         }
 773
 774         /**
 775          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 776          * @param $pOutput ParserOutput
 777          */
 778         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 779                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 780                 $titleText = $pOutput->getTitleText();
 781                 if ( strval( $titleText ) !== '' ) {
 782                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 783                 }
 784         }
 785
 786         /**
 787          * Show a diff page according to current request variables. For use within
 788          * Article::view() only, other callers should use the DifferenceEngine class.
 789          *
 790          * @todo: make protected
 791          */
 792         public function showDiffPage() {
 793                 $request = $this->getContext()->getRequest();
 794                 $user = $this->getContext()->getUser();
 795                 $diff = $request->getVal( 'diff' );
 796                 $rcid = $request->getVal( 'rcid' );
 797                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 798                 $purge = $request->getVal( 'action' ) == 'purge';
 799                 $unhide = $request->getInt( 'unhide' ) == 1;
 800                 $oldid = $this->getOldID();
 801
 802                 $rev = $this->getRevisionFetched();
 803
 804                 if ( !$rev ) {
 805                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 806                         $this->getContext()->getOutput()->addWikiMsg( 'difference-missing-revision', $oldid, 1 );
 807                         return;
 808                 }
 809
 810                 $contentHandler = $rev->getContentHandler();
 811                 $de = $contentHandler->createDifferenceEngine( $this->getContext(), $oldid, $diff, $rcid, $purge, $unhide );
 812
 813                 // DifferenceEngine directly fetched the revision:
 814                 $this->mRevIdFetched = $de->mNewid;
 815                 $de->showDiffPage( $diffOnly );
 816
 817                 if ( $diff == 0 || $diff == $this->mPage->getLatest() ) {
 818                         # Run view updates for current revision only
 819                         $this->mPage->doViewUpdates( $user );
 820                 }
 821         }
 822
 823         /**
 824          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 825          * Article::view() only.
 826          *
 827          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
 828          * page views.
 829          *
 830          * @param bool $showCacheHint whether to show a message telling the user to clear the browser cache (default: true).
 831          */
 832         protected function showCssOrJsPage( $showCacheHint = true ) {
 833                 $outputPage = $this->getContext()->getOutput();
 834
 835                 if ( $showCacheHint ) {
 836                         $dir = $this->getContext()->getLanguage()->getDir();
 837                         $lang = $this->getContext()->getLanguage()->getCode();
 838
 839                         $outputPage->wrapWikiMsg( "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 840                                 'clearyourcache' );
 841                 }
 842
 843                 $this->fetchContentObject();
 844
 845                 if ( $this->mContentObject ) {
 846                         // Give hooks a chance to customise the output
 847                         if ( ContentHandler::runLegacyHooks( 'ShowRawCssJs', array( $this->mContentObject, $this->getTitle(), $outputPage ) ) ) {
 848                                 $po = $this->mContentObject->getParserOutput( $this->getTitle() );
 849                                 $outputPage->addHTML( $po->getText() );
 850                         }
 851                 }
 852         }
 853
 854         /**
 855          * Get the robot policy to be used for the current view
 856          * @param string $action the action= GET parameter
 857          * @param $pOutput ParserOutput
 858          * @return Array the policy that should be set
 859          * TODO: actions other than 'view'
 860          */
 861         public function getRobotPolicy( $action, $pOutput ) {
 862                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 863
 864                 $ns = $this->getTitle()->getNamespace();
 865
 866                 # Don't index user and user talk pages for blocked users (bug 11443)
 867                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 868                         $specificTarget = null;
 869                         $vagueTarget = null;
 870                         $titleText = $this->getTitle()->getText();
 871                         if ( IP::isValid( $titleText ) ) {
 872                                 $vagueTarget = $titleText;
 873                         } else {
 874                                 $specificTarget = $titleText;
 875                         }
 876                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 877                                 return array(
 878                                         'index' => 'noindex',
 879                                         'follow' => 'nofollow'
 880                                 );
 881                         }
 882                 }
 883
 884                 if ( $this->mPage->getID() === 0 || $this->getOldID() ) {
 885                         # Non-articles (special pages etc), and old revisions
 886                         return array(
 887                                 'index' => 'noindex',
 888                                 'follow' => 'nofollow'
 889                         );
 890                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 891                         # Discourage indexing of printable versions, but encourage following
 892                         return array(
 893                                 'index' => 'noindex',
 894                                 'follow' => 'follow'
 895                         );
 896                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 897                         # For ?curid=x urls, disallow indexing
 898                         return array(
 899                                 'index' => 'noindex',
 900                                 'follow' => 'follow'
 901                         );
 902                 }
 903
 904                 # Otherwise, construct the policy based on the various config variables.
 905                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 906
 907                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 908                         # Honour customised robot policies for this namespace
 909                         $policy = array_merge(
 910                                 $policy,
 911                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 912                         );
 913                 }
 914                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 915                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 916                         # a final sanity check that we have really got the parser output.
 917                         $policy = array_merge(
 918                                 $policy,
 919                                 array( 'index' => $pOutput->getIndexPolicy() )
 920                         );
 921                 }
 922
 923                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 924                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 925                         $policy = array_merge(
 926                                 $policy,
 927                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 928                         );
 929                 }
 930
 931                 return $policy;
 932         }
 933
 934         /**
 935          * Converts a String robot policy into an associative array, to allow
 936          * merging of several policies using array_merge().
 937          * @param $policy Mixed, returns empty array on null/false/'', transparent
 938          *            to already-converted arrays, converts String.
 939          * @return Array: 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 940          */
 941         public static function formatRobotPolicy( $policy ) {
 942                 if ( is_array( $policy ) ) {
 943                         return $policy;
 944                 } elseif ( !$policy ) {
 945                         return array();
 946                 }
 947
 948                 $policy = explode( ',', $policy );
 949                 $policy = array_map( 'trim', $policy );
 950
 951                 $arr = array();
 952                 foreach ( $policy as $var ) {
 953                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
 954                                 $arr['index'] = $var;
 955                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
 956                                 $arr['follow'] = $var;
 957                         }
 958                 }
 959
 960                 return $arr;
 961         }
 962
 963         /**
 964          * If this request is a redirect view, send "redirected from" subtitle to
 965          * the output. Returns true if the header was needed, false if this is not
 966          * a redirect view. Handles both local and remote redirects.
 967          *
 968          * @return boolean
 969          */
 970         public function showRedirectedFromHeader() {
 971                 global $wgRedirectSources;
 972                 $outputPage = $this->getContext()->getOutput();
 973
 974                 $rdfrom = $this->getContext()->getRequest()->getVal( 'rdfrom' );
 975
 976                 if ( isset( $this->mRedirectedFrom ) ) {
 977                         // This is an internally redirected page view.
 978                         // We'll need a backlink to the source page for navigation.
 979                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 980                                 $redir = Linker::linkKnown(
 981                                         $this->mRedirectedFrom,
 982                                         null,
 983                                         array(),
 984                                         array( 'redirect' => 'no' )
 985                                 );
 986
 987                                 $outputPage->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
 988
 989                                 // Set the fragment if one was specified in the redirect
 990                                 if ( strval( $this->getTitle()->getFragment() ) != '' ) {
 991                                         $outputPage->addInlineScript( Xml::encodeJsCall(
 992                                                 'redirectToFragment', array( $this->getTitle()->getFragmentForURL() )
 993                                         ) );
 994                                 }
 995
 996                                 // Add a <link rel="canonical"> tag
 997                                 $outputPage->setCanonicalUrl( $this->getTitle()->getLocalURL() );
 998
 999                                 // Tell the output object that the user arrived at this article through a redirect
1000                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
1001
1002                                 return true;
1003                         }
1004                 } elseif ( $rdfrom ) {
1005                         // This is an externally redirected view, from some other wiki.
1006                         // If it was reported from a trusted site, supply a backlink.
1007                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
1008                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
1009                                 $outputPage->addSubtitle( wfMessage( 'redirectedfrom' )->rawParams( $redir ) );
1010
1011                                 return true;
1012                         }
1013                 }
1014
1015                 return false;
1016         }
1017
1018         /**
1019          * Show a header specific to the namespace currently being viewed, like
1020          * [[MediaWiki:Talkpagetext]]. For Article::view().
1021          */
1022         public function showNamespaceHeader() {
1023                 if ( $this->getTitle()->isTalkPage() ) {
1024                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1025                                 $this->getContext()->getOutput()->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
1026                         }
1027                 }
1028         }
1029
1030         /**
1031          * Show the footer section of an ordinary page view
1032          */
1033         public function showViewFooter() {
1034                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1035                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK && IP::isValid( $this->getTitle()->getText() ) ) {
1036                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1037                 }
1038
1039                 # If we have been passed an &rcid= parameter, we want to give the user a
1040                 # chance to mark this new article as patrolled.
1041                 $this->showPatrolFooter();
1042
1043                 wfRunHooks( 'ArticleViewFooter', array( $this ) );
1044
1045         }
1046
1047         /**
1048          * If patrol is possible, output a patrol UI box. This is called from the
1049          * footer section of ordinary page views. If patrol is not possible or not
1050          * desired, does nothing.
1051          * Side effect: When the patrol link is build, this method will call
1052          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1053          */
1054         public function showPatrolFooter() {
1055                 $request = $this->getContext()->getRequest();
1056                 $outputPage = $this->getContext()->getOutput();
1057                 $user = $this->getContext()->getUser();
1058                 $rcid = $request->getVal( 'rcid' );
1059
1060                 if ( !$rcid || !$this->getTitle()->quickUserCan( 'patrol', $user ) ) {
1061                         return;
1062                 }
1063
1064                 $token = $user->getEditToken( $rcid );
1065
1066                 $outputPage->preventClickjacking();
1067                 $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1068
1069                 $link = Linker::linkKnown(
1070                         $this->getTitle(),
1071                         wfMessage( 'markaspatrolledtext' )->escaped(),
1072                         array(),
1073                         array(
1074                                 'action' => 'markpatrolled',
1075                                 'rcid' => $rcid,
1076                                 'token' => $token,
1077                         )
1078                 );
1079
1080                 $outputPage->addHTML(
1081                         "<div class='patrollink'>" .
1082                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1083                         '</div>'
1084                 );
1085         }
1086
1087         /**
1088          * Show the error text for a missing article. For articles in the MediaWiki
1089          * namespace, show the default message text. To be called from Article::view().
1090          */
1091         public function showMissingArticle() {
1092                 global $wgSend404Code;
1093                 $outputPage = $this->getContext()->getOutput();
1094                 $validUserPage = false;
1095
1096                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1097                 if ( $this->getTitle()->getNamespace() == NS_USER || $this->getTitle()->getNamespace() == NS_USER_TALK ) {
1098                         $parts = explode( '/', $this->getTitle()->getText() );
1099                         $rootPart = $parts[0];
1100                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1101                         $ip = User::isIP( $rootPart );
1102
1103                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1104                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1105                                         array( 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ) );
1106                         } elseif ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1107                                 LogEventsList::showLogExtract(
1108                                         $outputPage,
1109                                         'block',
1110                                         $user->getUserPage(),
1111                                         '',
1112                                         array(
1113                                                 'lim' => 1,
1114                                                 'showIfEmpty' => false,
1115                                                 'msgKey' => array(
1116                                                         'blocked-notice-logextract',
1117                                                         $user->getName() # Support GENDER in notice
1118                                                 )
1119                                         )
1120                                 );
1121                                 $validUserPage = true;
1122                         } else {
1123                                 $validUserPage = true;
1124                         }
1125                 }
1126
1127                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1128
1129                 # Show delete and move logs
1130                 LogEventsList::showLogExtract( $outputPage, array( 'delete', 'move' ), $this->getTitle(), '',
1131                         array( 'lim' => 10,
1132                                 'conds' => array( "log_action != 'revision'" ),
1133                                 'showIfEmpty' => false,
1134                                 'msgKey' => array( 'moveddeleted-notice' ) )
1135                 );
1136
1137                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1138                         // If there's no backing content, send a 404 Not Found
1139                         // for better machine handling of broken links.
1140                         $this->getContext()->getRequest()->response()->header( "HTTP/1.1 404 Not Found" );
1141                 }
1142
1143                 $hookResult = wfRunHooks( 'BeforeDisplayNoArticleText', array( $this ) );
1144
1145                 if ( ! $hookResult ) {
1146                         return;
1147                 }
1148
1149                 # Show error message
1150                 $oldid = $this->getOldID();
1151                 if ( $oldid ) {
1152                         $text = wfMessage( 'missing-revision', $oldid )->plain();
1153                 } elseif ( $this->getTitle()->getNamespace() === NS_MEDIAWIKI ) {
1154                         // Use the default message text
1155                         $text = $this->getTitle()->getDefaultMessageText();
1156                 } elseif ( $this->getTitle()->quickUserCan( 'create', $this->getContext()->getUser() )
1157                         && $this->getTitle()->quickUserCan( 'edit', $this->getContext()->getUser() )
1158                 ) {
1159                         $text = wfMessage( 'noarticletext' )->plain();
1160                 } else {
1161                         $text = wfMessage( 'noarticletext-nopermission' )->plain();
1162                 }
1163                 $text = "<div class='noarticletext'>\n$text\n</div>";
1164
1165                 $outputPage->addWikiText( $text );
1166         }
1167
1168         /**
1169          * If the revision requested for view is deleted, check permissions.
1170          * Send either an error message or a warning header to the output.
1171          *
1172          * @return boolean true if the view is allowed, false if not.
1173          */
1174         public function showDeletedRevisionHeader() {
1175                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1176                         // Not deleted
1177                         return true;
1178                 }
1179
1180                 $outputPage = $this->getContext()->getOutput();
1181                 $user = $this->getContext()->getUser();
1182                 // If the user is not allowed to see it...
1183                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1184                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1185                                 'rev-deleted-text-permission' );
1186
1187                         return false;
1188                 // If the user needs to confirm that they want to see it...
1189                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1190                         # Give explanation and add a link to view the revision...
1191                         $oldid = intval( $this->getOldID() );
1192                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1193                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1194                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1195                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1196                                 array( $msg, $link ) );
1197
1198                         return false;
1199                 // We are allowed to see...
1200                 } else {
1201                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1202                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1203                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1204
1205                         return true;
1206                 }
1207         }
1208
1209         /**
1210          * Generate the navigation links when browsing through an article revisions
1211          * It shows the information as:
1212          *   Revision as of \<date\>; view current revision
1213          *   \<- Previous version | Next Version -\>
1214          *
1215          * @param int $oldid revision ID of this article revision
1216          */
1217         public function setOldSubtitle( $oldid = 0 ) {
1218                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
1219                         return;
1220                 }
1221
1222                 $unhide = $this->getContext()->getRequest()->getInt( 'unhide' ) == 1;
1223
1224                 # Cascade unhide param in links for easy deletion browsing
1225                 $extraParams = array();
1226                 if ( $unhide ) {
1227                         $extraParams['unhide'] = 1;
1228                 }
1229
1230                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1231                         $revision = $this->mRevision;
1232                 } else {
1233                         $revision = Revision::newFromId( $oldid );
1234                 }
1235
1236                 $timestamp = $revision->getTimestamp();
1237
1238                 $current = ( $oldid == $this->mPage->getLatest() );
1239                 $language = $this->getContext()->getLanguage();
1240                 $user = $this->getContext()->getUser();
1241
1242                 $td = $language->userTimeAndDate( $timestamp, $user );
1243                 $tddate = $language->userDate( $timestamp, $user );
1244                 $tdtime = $language->userTime( $timestamp, $user );
1245
1246                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1247                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1248
1249                 $infomsg = $current && !wfMessage( 'revision-info-current' )->isDisabled()
1250                         ? 'revision-info-current'
1251                         : 'revision-info';
1252
1253                 $outputPage = $this->getContext()->getOutput();
1254                 $outputPage->addSubtitle( "<div id=\"mw-{$infomsg}\">" . wfMessage( $infomsg,
1255                         $td )->rawParams( $userlinks )->params( $revision->getID(), $tddate,
1256                         $tdtime, $revision->getUser() )->parse() . "</div>" );
1257
1258                 $lnk = $current
1259                         ? wfMessage( 'currentrevisionlink' )->escaped()
1260                         : Linker::linkKnown(
1261                                 $this->getTitle(),
1262                                 wfMessage( 'currentrevisionlink' )->escaped(),
1263                                 array(),
1264                                 $extraParams
1265                         );
1266                 $curdiff = $current
1267                         ? wfMessage( 'diff' )->escaped()
1268                         : Linker::linkKnown(
1269                                 $this->getTitle(),
1270                                 wfMessage( 'diff' )->escaped(),
1271                                 array(),
1272                                 array(
1273                                         'diff' => 'cur',
1274                                         'oldid' => $oldid
1275                                 ) + $extraParams
1276                         );
1277                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1278                 $prevlink = $prev
1279                         ? Linker::linkKnown(
1280                                 $this->getTitle(),
1281                                 wfMessage( 'previousrevision' )->escaped(),
1282                                 array(),
1283                                 array(
1284                                         'direction' => 'prev',
1285                                         'oldid' => $oldid
1286                                 ) + $extraParams
1287                         )
1288                         : wfMessage( 'previousrevision' )->escaped();
1289                 $prevdiff = $prev
1290                         ? Linker::linkKnown(
1291                                 $this->getTitle(),
1292                                 wfMessage( 'diff' )->escaped(),
1293                                 array(),
1294                                 array(
1295                                         'diff' => 'prev',
1296                                         'oldid' => $oldid
1297                                 ) + $extraParams
1298                         )
1299                         : wfMessage( 'diff' )->escaped();
1300                 $nextlink = $current
1301                         ? wfMessage( 'nextrevision' )->escaped()
1302                         : Linker::linkKnown(
1303                                 $this->getTitle(),
1304                                 wfMessage( 'nextrevision' )->escaped(),
1305                                 array(),
1306                                 array(
1307                                         'direction' => 'next',
1308                                         'oldid' => $oldid
1309                                 ) + $extraParams
1310                         );
1311                 $nextdiff = $current
1312                         ? wfMessage( 'diff' )->escaped()
1313                         : Linker::linkKnown(
1314                                 $this->getTitle(),
1315                                 wfMessage( 'diff' )->escaped(),
1316                                 array(),
1317                                 array(
1318                                         'diff' => 'next',
1319                                         'oldid' => $oldid
1320                                 ) + $extraParams
1321                         );
1322
1323                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1324                 if ( $cdel !== '' ) {
1325                         $cdel .= ' ';
1326                 }
1327
1328                 $outputPage->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1329                         wfMessage( 'revision-nav' )->rawParams(
1330                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1331                         )->escaped() . "</div>" );
1332         }
1333
1334         /**
1335          * View redirect
1336          *
1337          * @param $target Title|Array of destination(s) to redirect
1338          * @param $appendSubtitle Boolean [optional]
1339          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1340          * @return string containing HMTL with redirect link
1341          */
1342         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1343                 global $wgStylePath;
1344
1345                 if ( !is_array( $target ) ) {
1346                         $target = array( $target );
1347                 }
1348
1349                 $lang = $this->getTitle()->getPageLanguage();
1350                 $imageDir = $lang->getDir();
1351
1352                 if ( $appendSubtitle ) {
1353                         $out = $this->getContext()->getOutput();
1354                         $out->addSubtitle( wfMessage( 'redirectpagesub' )->escaped() );
1355                 }
1356
1357                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1358
1359                 /**
1360                  * @var $title Title
1361                  */
1362                 $title = array_shift( $target );
1363
1364                 if ( $forceKnown ) {
1365                         $link = Linker::linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1366                 } else {
1367                         $link = Linker::link( $title, htmlspecialchars( $title->getFullText() ) );
1368                 }
1369
1370                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1371                 $alt = $lang->isRTL() ? '←' : '→';
1372                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1373                 foreach ( $target as $rt ) {
1374                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1375                         if ( $forceKnown ) {
1376                                 $link .= Linker::linkKnown( $rt, htmlspecialchars( $rt->getFullText(), array(), array( 'redirect' => 'no' ) ) );
1377                         } else {
1378                                 $link .= Linker::link( $rt, htmlspecialchars( $rt->getFullText() ), array(), array( 'redirect' => 'no' ) );
1379                         }
1380                 }
1381
1382                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1383                 return '<div class="redirectMsg">' .
1384                         Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1385                         '<span class="redirectText">' . $link . '</span></div>';
1386         }
1387
1388         /**
1389          * Handle action=render
1390          */
1391         public function render() {
1392                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1393                 $this->view();
1394         }
1395
1396         /**
1397          * action=protect handler
1398          */
1399         public function protect() {
1400                 $form = new ProtectionForm( $this );
1401                 $form->execute();
1402         }
1403
1404         /**
1405          * action=unprotect handler (alias)
1406          */
1407         public function unprotect() {
1408                 $this->protect();
1409         }
1410
1411         /**
1412          * UI entry point for page deletion
1413          */
1414         public function delete() {
1415                 # This code desperately needs to be totally rewritten
1416
1417                 $title = $this->getTitle();
1418                 $user = $this->getContext()->getUser();
1419
1420                 # Check permissions
1421                 $permission_errors = $title->getUserPermissionsErrors( 'delete', $user );
1422                 if ( count( $permission_errors ) ) {
1423                         throw new PermissionsError( 'delete', $permission_errors );
1424                 }
1425
1426                 # Read-only check...
1427                 if ( wfReadOnly() ) {
1428                         throw new ReadOnlyError;
1429                 }
1430
1431                 # Better double-check that it hasn't been deleted yet!
1432                 $this->mPage->loadPageData( 'fromdbmaster' );
1433                 if ( !$this->mPage->exists() ) {
1434                         $deleteLogPage = new LogPage( 'delete' );
1435                         $outputPage = $this->getContext()->getOutput();
1436                         $outputPage->setPageTitle( wfMessage( 'cannotdelete-title', $title->getPrefixedText() ) );
1437                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1438                                         array( 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) )
1439                                 );
1440                         $outputPage->addHTML(
1441                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1442                         );
1443                         LogEventsList::showLogExtract(
1444                                 $outputPage,
1445                                 'delete',
1446                                 $title
1447                         );
1448
1449                         return;
1450                 }
1451
1452                 $request = $this->getContext()->getRequest();
1453                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1454                 $deleteReason = $request->getText( 'wpReason' );
1455
1456                 if ( $deleteReasonList == 'other' ) {
1457                         $reason = $deleteReason;
1458                 } elseif ( $deleteReason != '' ) {
1459                         // Entry from drop down menu + additional comment
1460                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1461                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1462                 } else {
1463                         $reason = $deleteReasonList;
1464                 }
1465
1466                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1467                         array( 'delete', $this->getTitle()->getPrefixedText() ) ) )
1468                 {
1469                         # Flag to hide all contents of the archived revisions
1470                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1471
1472                         $this->doDelete( $reason, $suppress );
1473
1474                         if ( $user->isLoggedIn() && $request->getCheck( 'wpWatch' ) != $user->isWatched( $title ) ) {
1475                                 if ( $request->getCheck( 'wpWatch' ) ) {
1476                                         WatchAction::doWatch( $title, $user );
1477                                 } else {
1478                                         WatchAction::doUnwatch( $title, $user );
1479                                 }
1480                         }
1481
1482                         return;
1483                 }
1484
1485                 // Generate deletion reason
1486                 $hasHistory = false;
1487                 if ( !$reason ) {
1488                         try {
1489                                 $reason = $this->generateReason( $hasHistory );
1490                         } catch ( MWException $e ) {
1491                                 # if a page is horribly broken, we still want to be able to delete it. so be lenient about errors here.
1492                                 wfDebug( "Error while building auto delete summary: $e" );
1493                                 $reason = '';
1494                         }
1495                 }
1496
1497                 // If the page has a history, insert a warning
1498                 if ( $hasHistory ) {
1499                         $revisions = $this->mTitle->estimateRevisionCount();
1500                         // @todo FIXME: i18n issue/patchwork message
1501                         $this->getContext()->getOutput()->addHTML( '<strong class="mw-delete-warning-revisions">' .
1502                                 wfMessage( 'historywarning' )->numParams( $revisions )->parse() .
1503                                 wfMessage( 'word-separator' )->plain() . Linker::linkKnown( $title,
1504                                         wfMessage( 'history' )->escaped(),
1505                                         array( 'rel' => 'archives' ),
1506                                         array( 'action' => 'history' ) ) .
1507                                 '</strong>'
1508                         );
1509
1510                         if ( $this->mTitle->isBigDeletion() ) {
1511                                 global $wgDeleteRevisionsLimit;
1512                                 $this->getContext()->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1513                                         array( 'delete-warning-toobig', $this->getContext()->getLanguage()->formatNum( $wgDeleteRevisionsLimit ) ) );
1514                         }
1515                 }
1516
1517                 $this->confirmDelete( $reason );
1518         }
1519
1520         /**
1521          * Output deletion confirmation dialog
1522          * @todo FIXME: Move to another file?
1523          * @param string $reason prefilled reason
1524          */
1525         public function confirmDelete( $reason ) {
1526                 wfDebug( "Article::confirmDelete\n" );
1527
1528                 $outputPage = $this->getContext()->getOutput();
1529                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $this->getTitle()->getPrefixedText() ) );
1530                 $outputPage->addBacklinkSubtitle( $this->getTitle() );
1531                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1532                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1533
1534                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $outputPage, &$reason ) );
1535
1536                 $user = $this->getContext()->getUser();
1537
1538                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1539                         $suppress = "<tr id=\"wpDeleteSuppressRow\">
1540                                         <td></td>
1541                                         <td class='mw-input'><strong>" .
1542                                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1543                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
1544                                         "</strong></td>
1545                                 </tr>";
1546                 } else {
1547                         $suppress = '';
1548                 }
1549                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $this->getTitle() );
1550
1551                 $form = Xml::openElement( 'form', array( 'method' => 'post',
1552                         'action' => $this->getTitle()->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
1553                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
1554                         Xml::tags( 'legend', null, wfMessage( 'delete-legend' )->escaped() ) .
1555                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
1556                         "<tr id=\"wpDeleteReasonListRow\">
1557                                 <td class='mw-label'>" .
1558                                         Xml::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1559                                 "</td>
1560                                 <td class='mw-input'>" .
1561                                         Xml::listDropDown( 'wpDeleteReasonList',
1562                                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1563                                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(), '', 'wpReasonDropDown', 1 ) .
1564                                 "</td>
1565                         </tr>
1566                         <tr id=\"wpDeleteReasonRow\">
1567                                 <td class='mw-label'>" .
1568                                         Xml::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1569                                 "</td>
1570                                 <td class='mw-input'>" .
1571                                 Html::input( 'wpReason', $reason, 'text', array(
1572                                         'size' => '60',
1573                                         'maxlength' => '255',
1574                                         'tabindex' => '2',
1575                                         'id' => 'wpReason',
1576                                         'autofocus'
1577                                 ) ) .
1578                                 "</td>
1579                         </tr>";
1580
1581                 # Disallow watching if user is not logged in
1582                 if ( $user->isLoggedIn() ) {
1583                         $form .= "
1584                         <tr>
1585                                 <td></td>
1586                                 <td class='mw-input'>" .
1587                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1588                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
1589                                 "</td>
1590                         </tr>";
1591                 }
1592
1593                 $form .= "
1594                         $suppress
1595                         <tr>
1596                                 <td></td>
1597                                 <td class='mw-submit'>" .
1598                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1599                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
1600                                 "</td>
1601                         </tr>" .
1602                         Xml::closeElement( 'table' ) .
1603                         Xml::closeElement( 'fieldset' ) .
1604                         Html::hidden( 'wpEditToken', $user->getEditToken( array( 'delete', $this->getTitle()->getPrefixedText() ) ) ) .
1605                         Xml::closeElement( 'form' );
1606
1607                         if ( $user->isAllowed( 'editinterface' ) ) {
1608                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
1609                                 $link = Linker::link(
1610                                         $title,
1611                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1612                                         array(),
1613                                         array( 'action' => 'edit' )
1614                                 );
1615                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1616                         }
1617
1618                 $outputPage->addHTML( $form );
1619
1620                 $deleteLogPage = new LogPage( 'delete' );
1621                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1622                 LogEventsList::showLogExtract( $outputPage, 'delete',
1623                         $this->getTitle()
1624                 );
1625         }
1626
1627         /**
1628          * Perform a deletion and output success or failure messages
1629          * @param $reason
1630          * @param $suppress bool
1631          */
1632         public function doDelete( $reason, $suppress = false ) {
1633                 $error = '';
1634                 $outputPage = $this->getContext()->getOutput();
1635                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error );
1636                 if ( $status->isGood() ) {
1637                         $deleted = $this->getTitle()->getPrefixedText();
1638
1639                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1640                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1641
1642                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1643
1644                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1645                         $outputPage->returnToMain( false );
1646                 } else {
1647                         $outputPage->setPageTitle( wfMessage( 'cannotdelete-title', $this->getTitle()->getPrefixedText() ) );
1648                         if ( $error == '' ) {
1649                                 $outputPage->addWikiText(
1650                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1651                                 );
1652                                 $deleteLogPage = new LogPage( 'delete' );
1653                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1654
1655                                 LogEventsList::showLogExtract(
1656                                         $outputPage,
1657                                         'delete',
1658                                         $this->getTitle()
1659                                 );
1660                         } else {
1661                                 $outputPage->addHTML( $error );
1662                         }
1663                 }
1664         }
1665
1666         /* Caching functions */
1667
1668         /**
1669          * checkLastModified returns true if it has taken care of all
1670          * output to the client that is necessary for this request.
1671          * (that is, it has sent a cached version of the page)
1672          *
1673          * @return boolean true if cached version send, false otherwise
1674          */
1675         protected function tryFileCache() {
1676                 static $called = false;
1677
1678                 if ( $called ) {
1679                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1680                         return false;
1681                 }
1682
1683                 $called = true;
1684                 if ( $this->isFileCacheable() ) {
1685                         $cache = HTMLFileCache::newFromTitle( $this->getTitle(), 'view' );
1686                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1687                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1688                                 $cache->loadFromFileCache( $this->getContext() );
1689                                 return true;
1690                         } else {
1691                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1692                                 ob_start( array( &$cache, 'saveToFileCache' ) );
1693                         }
1694                 } else {
1695                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1696                 }
1697
1698                 return false;
1699         }
1700
1701         /**
1702          * Check if the page can be cached
1703          * @return bool
1704          */
1705         public function isFileCacheable() {
1706                 $cacheable = false;
1707
1708                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1709                         $cacheable = $this->mPage->getID()
1710                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1711                         // Extension may have reason to disable file caching on some pages.
1712                         if ( $cacheable ) {
1713                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
1714                         }
1715                 }
1716
1717                 return $cacheable;
1718         }
1719
1720         /**#@-*/
1721
1722         /**
1723          * Lightweight method to get the parser output for a page, checking the parser cache
1724          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1725          * consider, so it's not appropriate to use there.
1726          *
1727          * @since 1.16 (r52326) for LiquidThreads
1728          *
1729          * @param $oldid mixed integer Revision ID or null
1730          * @param $user User The relevant user
1731          * @return ParserOutput or false if the given revision ID is not found
1732          */
1733         public function getParserOutput( $oldid = null, User $user = null ) {
1734                 //XXX: bypasses mParserOptions and thus setParserOptions()
1735
1736                 if ( $user === null ) {
1737                         $parserOptions = $this->getParserOptions();
1738                 } else {
1739                         $parserOptions = $this->mPage->makeParserOptions( $user );
1740                 }
1741
1742                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1743         }
1744
1745         /**
1746          * Override the ParserOptions used to render the primary article wikitext.
1747          *
1748          * @param ParserOptions $options
1749          * @throws MWException if the parser options where already initialized.
1750          */
1751         public function setParserOptions( ParserOptions $options ) {
1752                 if ( $this->mParserOptions ) {
1753                         throw new MWException( "can't change parser options after they have already been set" );
1754                 }
1755
1756                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1757                 $this->mParserOptions = clone $options;
1758         }
1759
1760         /**
1761          * Get parser options suitable for rendering the primary article wikitext
1762          * @return ParserOptions
1763          */
1764         public function getParserOptions() {
1765                 if ( !$this->mParserOptions ) {
1766                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
1767                 }
1768                 // Clone to allow modifications of the return value without affecting cache
1769                 return clone $this->mParserOptions;
1770         }
1771
1772         /**
1773          * Sets the context this Article is executed in
1774          *
1775          * @param $context IContextSource
1776          * @since 1.18
1777          */
1778         public function setContext( $context ) {
1779                 $this->mContext = $context;
1780         }
1781
1782         /**
1783          * Gets the context this Article is executed in
1784          *
1785          * @return IContextSource
1786          * @since 1.18
1787          */
1788         public function getContext() {
1789                 if ( $this->mContext instanceof IContextSource ) {
1790                         return $this->mContext;
1791                 } else {
1792                         wfDebug( __METHOD__ . " called and \$mContext is null. Return RequestContext::getMain(); for sanity\n" );
1793                         return RequestContext::getMain();
1794                 }
1795         }
1796
1797         /**
1798          * Info about this page
1799          * @deprecated since 1.19
1800          */
1801         public function info() {
1802                 wfDeprecated( __METHOD__, '1.19' );
1803                 Action::factory( 'info', $this )->show();
1804         }
1805
1806         /**
1807          * Mark this particular edit/page as patrolled
1808          * @deprecated since 1.18
1809          */
1810         public function markpatrolled() {
1811                 wfDeprecated( __METHOD__, '1.18' );
1812                 Action::factory( 'markpatrolled', $this )->show();
1813         }
1814
1815         /**
1816          * Handle action=purge
1817          * @deprecated since 1.19
1818          * @return Action|bool|null false if the action is disabled, null if it is not recognised
1819          */
1820         public function purge() {
1821                 return Action::factory( 'purge', $this )->show();
1822         }
1823
1824         /**
1825          * Handle action=revert
1826          * @deprecated since 1.19
1827          */
1828         public function revert() {
1829                 wfDeprecated( __METHOD__, '1.19' );
1830                 Action::factory( 'revert', $this )->show();
1831         }
1832
1833         /**
1834          * Handle action=rollback
1835          * @deprecated since 1.19
1836          */
1837         public function rollback() {
1838                 wfDeprecated( __METHOD__, '1.19' );
1839                 Action::factory( 'rollback', $this )->show();
1840         }
1841
1842         /**
1843          * User-interface handler for the "watch" action.
1844          * Requires Request to pass a token as of 1.18.
1845          * @deprecated since 1.18
1846          */
1847         public function watch() {
1848                 wfDeprecated( __METHOD__, '1.18' );
1849                 Action::factory( 'watch', $this )->show();
1850         }
1851
1852         /**
1853          * Add this page to the current user's watchlist
1854          *
1855          * This is safe to be called multiple times
1856          *
1857          * @return bool true on successful watch operation
1858          * @deprecated since 1.18
1859          */
1860         public function doWatch() {
1861                 wfDeprecated( __METHOD__, '1.18' );
1862                 return WatchAction::doWatch( $this->getTitle(), $this->getContext()->getUser() );
1863         }
1864
1865         /**
1866          * User interface handler for the "unwatch" action.
1867          * Requires Request to pass a token as of 1.18.
1868          * @deprecated since 1.18
1869          */
1870         public function unwatch() {
1871                 wfDeprecated( __METHOD__, '1.18' );
1872                 Action::factory( 'unwatch', $this )->show();
1873         }
1874
1875         /**
1876          * Stop watching a page
1877          * @return bool true on successful unwatch
1878          * @deprecated since 1.18
1879          */
1880         public function doUnwatch() {
1881                 wfDeprecated( __METHOD__, '1.18' );
1882                 return WatchAction::doUnwatch( $this->getTitle(), $this->getContext()->getUser() );
1883         }
1884
1885         /**
1886          * Output a redirect back to the article.
1887          * This is typically used after an edit.
1888          *
1889          * @deprecated in 1.18; call OutputPage::redirect() directly
1890          * @param $noRedir Boolean: add redirect=no
1891          * @param string $sectionAnchor section to redirect to, including "#"
1892          * @param string $extraQuery extra query params
1893          */
1894         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1895                 wfDeprecated( __METHOD__, '1.18' );
1896                 if ( $noRedir ) {
1897                         $query = 'redirect=no';
1898                         if ( $extraQuery ) {
1899                                 $query .= "&$extraQuery";
1900                         }
1901                 } else {
1902                         $query = $extraQuery;
1903                 }
1904
1905                 $this->getContext()->getOutput()->redirect( $this->getTitle()->getFullURL( $query ) . $sectionAnchor );
1906         }
1907
1908         /**
1909          * Use PHP's magic __get handler to handle accessing of
1910          * raw WikiPage fields for backwards compatibility.
1911          *
1912          * @param string $fname Field name
1913          */
1914         public function __get( $fname ) {
1915                 if ( property_exists( $this->mPage, $fname ) ) {
1916                         #wfWarn( "Access to raw $fname field " . __CLASS__ );
1917                         return $this->mPage->$fname;
1918                 }
1919                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1920         }
1921
1922         /**
1923          * Use PHP's magic __set handler to handle setting of
1924          * raw WikiPage fields for backwards compatibility.
1925          *
1926          * @param string $fname Field name
1927          * @param $fvalue mixed New value
1928          */
1929         public function __set( $fname, $fvalue ) {
1930                 if ( property_exists( $this->mPage, $fname ) ) {
1931                         #wfWarn( "Access to raw $fname field of " . __CLASS__ );
1932                         $this->mPage->$fname = $fvalue;
1933                 // Note: extensions may want to toss on new fields
1934                 } elseif ( !in_array( $fname, array( 'mContext', 'mPage' ) ) ) {
1935                         $this->mPage->$fname = $fvalue;
1936                 } else {
1937                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1938                 }
1939         }
1940
1941         /**
1942          * Use PHP's magic __call handler to transform instance calls to
1943          * WikiPage functions for backwards compatibility.
1944          *
1945          * @param string $fname Name of called method
1946          * @param array $args Arguments to the method
1947          * @return mixed
1948          */
1949         public function __call( $fname, $args ) {
1950                 if ( is_callable( array( $this->mPage, $fname ) ) ) {
1951                         #wfWarn( "Call to " . __CLASS__ . "::$fname; please use WikiPage instead" );
1952                         return call_user_func_array( array( $this->mPage, $fname ), $args );
1953                 }
1954                 trigger_error( 'Inaccessible function via __call(): ' . $fname, E_USER_ERROR );
1955         }
1956
1957         // ****** B/C functions to work-around PHP silliness with __call and references ****** //
1958
1959         /**
1960          * @param $limit array
1961          * @param $expiry array
1962          * @param $cascade bool
1963          * @param $reason string
1964          * @param $user User
1965          * @return Status
1966          */
1967         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade, $reason, User $user ) {
1968                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
1969         }
1970
1971         /**
1972          * @param $limit array
1973          * @param $reason string
1974          * @param $cascade int
1975          * @param $expiry array
1976          * @return bool
1977          */
1978         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
1979                 return $this->mPage->doUpdateRestrictions(
1980                         $limit,
1981                         $expiry,
1982                         $cascade,
1983                         $reason,
1984                         $this->getContext()->getUser()
1985                 );
1986         }
1987
1988         /**
1989          * @param $reason string
1990          * @param $suppress bool
1991          * @param $id int
1992          * @param $commit bool
1993          * @param $error string
1994          * @return bool
1995          */
1996         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true, &$error = '' ) {
1997                 return $this->mPage->doDeleteArticle( $reason, $suppress, $id, $commit, $error );
1998         }
1999
2000         /**
2001          * @param $fromP
2002          * @param $summary
2003          * @param $token
2004          * @param $bot
2005          * @param $resultDetails
2006          * @param $user User
2007          * @return array
2008          */
2009         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2010                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2011                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2012         }
2013
2014         /**
2015          * @param $fromP
2016          * @param $summary
2017          * @param $bot
2018          * @param $resultDetails
2019          * @param $guser User
2020          * @return array
2021          */
2022         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2023                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2024                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2025         }
2026
2027         /**
2028          * @param $hasHistory bool
2029          * @return mixed
2030          */
2031         public function generateReason( &$hasHistory ) {
2032                 $title = $this->mPage->getTitle();
2033                 $handler = ContentHandler::getForTitle( $title );
2034                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2035         }
2036
2037         // ****** B/C functions for static methods ( __callStatic is PHP>=5.3 ) ****** //
2038
2039         /**
2040          * @return array
2041          */
2042         public static function selectFields() {
2043                 return WikiPage::selectFields();
2044         }
2045
2046         /**
2047          * @param $title Title
2048          */
2049         public static function onArticleCreate( $title ) {
2050                 WikiPage::onArticleCreate( $title );
2051         }
2052
2053         /**
2054          * @param $title Title
2055          */
2056         public static function onArticleDelete( $title ) {
2057                 WikiPage::onArticleDelete( $title );
2058         }
2059
2060         /**
2061          * @param $title Title
2062          */
2063         public static function onArticleEdit( $title ) {
2064                 WikiPage::onArticleEdit( $title );
2065         }
2066
2067         /**
2068          * @param $oldtext
2069          * @param $newtext
2070          * @param $flags
2071          * @return string
2072          * @deprecated since 1.21, use ContentHandler::getAutosummary() instead
2073          */
2074         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2075                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2076         }
2077         // ******
2078 }