includes/OutputPage.php

   1 <?php
   2 if ( !defined( 'MEDIAWIKI' ) ) {
   3         die( 1 );
   4 }
   5
   6 /**
   7  * @todo document
   8  */
   9 class OutputPage {
  10         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  11         var $mExtStyles = array();
  12         var $mPagetitle = '', $mBodytext = '';
  13
  14         /**
  15          * Holds the debug lines that will be outputted as comments in page source if
  16          * $wgDebugComments is enabled. See also $wgShowDebug.
  17          * TODO: make a getter method for this
  18          */
  19         public $mDebugtext = '';
  20
  21         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  22         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  23         var $mLastModified = '', $mETag = false;
  24         var $mCategoryLinks = array(), $mCategories = array(), $mLanguageLinks = array();
  25
  26         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  27         var $mInlineMsg = array();
  28
  29         var $mTemplateIds = array();
  30
  31         var $mAllowUserJs;
  32         var $mSuppressQuickbar = false;
  33         var $mDoNothing = false;
  34         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  35         var $mIsArticleRelated = true;
  36         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  37
  38         var $mFeedLinks = array();
  39
  40         var $mEnableClientCache = true;
  41         var $mArticleBodyOnly = false;
  42
  43         var $mNewSectionLink = false;
  44         var $mHideNewSectionLink = false;
  45         var $mNoGallery = false;
  46         var $mPageTitleActionText = '';
  47         var $mParseWarnings = array();
  48         var $mSquidMaxage = 0;
  49         var $mRevisionId = null;
  50         protected $mTitle = null;
  51
  52         /**
  53          * An array of stylesheet filenames (relative from skins path), with options
  54          * for CSS media, IE conditions, and RTL/LTR direction.
  55          * For internal use; add settings in the skin via $this->addStyle()
  56          */
  57         var $styles = array();
  58
  59         /**
  60          * Whether to load jQuery core.
  61          */
  62         protected $mJQueryDone = false;
  63
  64         private $mIndexPolicy = 'index';
  65         private $mFollowPolicy = 'follow';
  66         private $mVaryHeader = array(
  67                 'Accept-Encoding' => array( 'list-contains=gzip' ),
  68                 'Cookie' => null
  69         );
  70
  71         /**
  72          * Constructor
  73          * Initialise private variables
  74          */
  75         function __construct() {
  76                 global $wgAllowUserJs;
  77                 $this->mAllowUserJs = $wgAllowUserJs;
  78         }
  79
  80         /**
  81          * Redirect to $url rather than displaying the normal page
  82          *
  83          * @param $url String: URL
  84          * @param $responsecode String: HTTP status code
  85          */
  86         public function redirect( $url, $responsecode = '302' ) {
  87                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  88                 $this->mRedirect = str_replace( "\n", '', $url );
  89                 $this->mRedirectCode = $responsecode;
  90         }
  91
  92         /**
  93          * Get the URL to redirect to, or an empty string if not redirect URL set
  94          *
  95          * @return String
  96          */
  97         public function getRedirect() {
  98                 return $this->mRedirect;
  99         }
 100
 101         /**
 102          * Set the HTTP status code to send with the output.
 103          *
 104          * @param $statusCode Integer
 105          * @return nothing
 106          */
 107         public function setStatusCode( $statusCode ) {
 108                 $this->mStatusCode = $statusCode;
 109         }
 110
 111         /**
 112          * Add a new <meta> tag
 113          * To add an http-equiv meta tag, precede the name with "http:"
 114          *
 115          * @param $name tag name
 116          * @param $val tag value
 117          */
 118         function addMeta( $name, $val ) {
 119                 array_push( $this->mMetatags, array( $name, $val ) );
 120         }
 121
 122         /**
 123          * Add a keyword or a list of keywords in the page header
 124          *
 125          * @param $text String or array of strings
 126          */
 127         function addKeyword( $text ) {
 128                 if( is_array( $text ) ) {
 129                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 130                 } else {
 131                         array_push( $this->mKeywords, $text );
 132                 }
 133         }
 134
 135         /**
 136          * Add a new \<link\> tag to the page header
 137          *
 138          * @param $linkarr Array: associative array of attributes.
 139          */
 140         function addLink( $linkarr ) {
 141                 array_push( $this->mLinktags, $linkarr );
 142         }
 143
 144         /**
 145          * Add a new \<link\> with "rel" attribute set to "meta"
 146          *
 147          * @param $linkarr Array: associative array mapping attribute names to their
 148          *                 values, both keys and values will be escaped, and the
 149          *                 "rel" attribute will be automatically added
 150          */
 151         function addMetadataLink( $linkarr ) {
 152                 # note: buggy CC software only reads first "meta" link
 153                 static $haveMeta = false;
 154                 $linkarr['rel'] = $haveMeta ? 'alternate meta' : 'meta';
 155                 $this->addLink( $linkarr );
 156                 $haveMeta = true;
 157         }
 158
 159         /**
 160          * Add raw HTML to the list of scripts (including \<script\> tag, etc.)
 161          *
 162          * @param $script String: raw HTML
 163          */
 164         function addScript( $script ) {
 165                 $this->mScripts .= $script . "\n";
 166         }
 167
 168         /**
 169          * Register and add a stylesheet from an extension directory.
 170          *
 171          * @param $url String path to sheet.  Provide either a full url (beginning
 172          *             with 'http', etc) or a relative path from the document root
 173          *             (beginning with '/').  Otherwise it behaves identically to
 174          *             addStyle() and draws from the /skins folder.
 175          */
 176         public function addExtensionStyle( $url ) {
 177                 array_push( $this->mExtStyles, $url );
 178         }
 179
 180         /**
 181          * Get all links added by extensions
 182          *
 183          * @return Array
 184          */
 185         function getExtStyle() {
 186                 return $this->mExtStyles;
 187         }
 188
 189         /**
 190          * Add a JavaScript file out of skins/common, or a given relative path.
 191          *
 192          * @param $file String: filename in skins/common or complete on-server path
 193          *              (/foo/bar.js)
 194          * @param $version String: style version of the file. Defaults to $wgStyleVersion
 195          */
 196         public function addScriptFile( $file, $version = null ) {
 197                 global $wgStylePath, $wgStyleVersion;
 198                 // See if $file parameter is an absolute URL or begins with a slash
 199                 if( substr( $file, 0, 1 ) == '/' || preg_match( '#^[a-z]*://#i', $file ) ) {
 200                         $path = $file;
 201                 } else {
 202                         $path = "{$wgStylePath}/common/{$file}";
 203                 }
 204                 if ( is_null( $version ) )
 205                         $version = $wgStyleVersion;
 206                 $this->addScript( Html::linkedScript( wfAppendQuery( $path, $version ) ) );
 207         }
 208
 209         /**
 210          * Add a self-contained script tag with the given contents
 211          *
 212          * @param $script String: JavaScript text, no <script> tags
 213          */
 214         public function addInlineScript( $script ) {
 215                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 216         }
 217
 218         /**
 219          * Get all registered JS and CSS tags for the header.
 220          *
 221          * @return String
 222          */
 223         function getScript() {
 224                 return $this->mScripts . $this->getHeadItems();
 225         }
 226
 227         /**
 228          * Get all header items in a string
 229          *
 230          * @return String
 231          */
 232         function getHeadItems() {
 233                 $s = '';
 234                 foreach ( $this->mHeadItems as $item ) {
 235                         $s .= $item;
 236                 }
 237                 return $s;
 238         }
 239
 240         /**
 241          * Add or replace an header item to the output
 242          *
 243          * @param $name String: item name
 244          * @param $value String: raw HTML
 245          */
 246         public function addHeadItem( $name, $value ) {
 247                 $this->mHeadItems[$name] = $value;
 248         }
 249
 250         /**
 251          * Check if the header item $name is already set
 252          *
 253          * @param $name String: item name
 254          * @return Boolean
 255          */
 256         public function hasHeadItem( $name ) {
 257                 return isset( $this->mHeadItems[$name] );
 258         }
 259
 260         /**
 261          * Set the value of the ETag HTTP header, only used if $wgUseETag is true
 262          *
 263          * @param $tag String: value of "ETag" header
 264          */
 265         function setETag( $tag ) {
 266                 $this->mETag = $tag;
 267         }
 268
 269         /**
 270          * Set whether the output should only contain the body of the article,
 271          * without any skin, sidebar, etc.
 272          * Used e.g. when calling with "action=render".
 273          *
 274          * @param $only Boolean: whether to output only the body of the article
 275          */
 276         public function setArticleBodyOnly( $only ) {
 277                 $this->mArticleBodyOnly = $only;
 278         }
 279
 280         /**
 281          * Return whether the output will contain only the body of the article
 282          *
 283          * @return Boolean
 284          */
 285         public function getArticleBodyOnly() {
 286                 return $this->mArticleBodyOnly;
 287         }
 288
 289         /**
 290          * checkLastModified tells the client to use the client-cached page if
 291          * possible. If sucessful, the OutputPage is disabled so that
 292          * any future call to OutputPage->output() have no effect.
 293          *
 294          * Side effect: sets mLastModified for Last-Modified header
 295          *
 296          * @return Boolean: true iff cache-ok headers was sent.
 297          */
 298         public function checkLastModified( $timestamp ) {
 299                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 300
 301                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 302                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 303                         return false;
 304                 }
 305                 if( !$wgCachePages ) {
 306                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 307                         return false;
 308                 }
 309                 if( $wgUser->getOption( 'nocache' ) ) {
 310                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 311                         return false;
 312                 }
 313
 314                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 315                 $modifiedTimes = array(
 316                         'page' => $timestamp,
 317                         'user' => $wgUser->getTouched(),
 318                         'epoch' => $wgCacheEpoch
 319                 );
 320                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 321
 322                 $maxModified = max( $modifiedTimes );
 323                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 324
 325                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 326                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 327                         return false;
 328                 }
 329
 330                 # Make debug info
 331                 $info = '';
 332                 foreach ( $modifiedTimes as $name => $value ) {
 333                         if ( $info !== '' ) {
 334                                 $info .= ', ';
 335                         }
 336                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 337                 }
 338
 339                 # IE sends sizes after the date like this:
 340                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 341                 # this breaks strtotime().
 342                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 343
 344                 wfSuppressWarnings(); // E_STRICT system time bitching
 345                 $clientHeaderTime = strtotime( $clientHeader );
 346                 wfRestoreWarnings();
 347                 if ( !$clientHeaderTime ) {
 348                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 349                         return false;
 350                 }
 351                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 352
 353                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 354                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 355                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 356                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 357                 if( $clientHeaderTime < $maxModified ) {
 358                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 359                         return false;
 360                 }
 361
 362                 # Not modified
 363                 # Give a 304 response code and disable body output
 364                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 365                 ini_set( 'zlib.output_compression', 0 );
 366                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 367                 $this->sendCacheControl();
 368                 $this->disable();
 369
 370                 // Don't output a compressed blob when using ob_gzhandler;
 371                 // it's technically against HTTP spec and seems to confuse
 372                 // Firefox when the response gets split over two packets.
 373                 wfClearOutputBuffers();
 374
 375                 return true;
 376         }
 377
 378         /**
 379          * Override the last modified timestamp
 380          *
 381          * @param $timestamp String: new timestamp, in a format readable by
 382          *        wfTimestamp()
 383          */
 384         public function setLastModified( $timestamp ) {
 385                 $this->mLastModified = wfTimestamp( TS_RFC2822, $timestamp );
 386         }
 387
 388         /**
 389          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 390          *
 391          * @param $policy String: the literal string to output as the contents of
 392          *   the meta tag.  Will be parsed according to the spec and output in
 393          *   standardized form.
 394          * @return null
 395          */
 396         public function setRobotPolicy( $policy ) {
 397                 $policy = Article::formatRobotPolicy( $policy );
 398
 399                 if( isset( $policy['index'] ) ) {
 400                         $this->setIndexPolicy( $policy['index'] );
 401                 }
 402                 if( isset( $policy['follow'] ) ) {
 403                         $this->setFollowPolicy( $policy['follow'] );
 404                 }
 405         }
 406
 407         /**
 408          * Set the index policy for the page, but leave the follow policy un-
 409          * touched.
 410          *
 411          * @param $policy string Either 'index' or 'noindex'.
 412          * @return null
 413          */
 414         public function setIndexPolicy( $policy ) {
 415                 $policy = trim( $policy );
 416                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 417                         $this->mIndexPolicy = $policy;
 418                 }
 419         }
 420
 421         /**
 422          * Set the follow policy for the page, but leave the index policy un-
 423          * touched.
 424          *
 425          * @param $policy String: either 'follow' or 'nofollow'.
 426          * @return null
 427          */
 428         public function setFollowPolicy( $policy ) {
 429                 $policy = trim( $policy );
 430                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 431                         $this->mFollowPolicy = $policy;
 432                 }
 433         }
 434
 435         /**
 436          * Set the new value of the "action text", this will be added to the
 437          * "HTML title", separated from it with " - ".
 438          *
 439          * @param $text String: new value of the "action text"
 440          */
 441         public function setPageTitleActionText( $text ) {
 442                 $this->mPageTitleActionText = $text;
 443         }
 444
 445         /**
 446          * Get the value of the "action text"
 447          *
 448          * @return String
 449          */
 450         public function getPageTitleActionText() {
 451                 if ( isset( $this->mPageTitleActionText ) ) {
 452                         return $this->mPageTitleActionText;
 453                 }
 454         }
 455
 456         /**
 457          * "HTML title" means the contents of <title>.
 458          * It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 459          */
 460         public function setHTMLTitle( $name ) {
 461                 $this->mHTMLtitle = $name;
 462         }
 463
 464         /**
 465          * Return the "HTML title", i.e. the content of the <title> tag.
 466          *
 467          * @return String
 468          */
 469         public function getHTMLTitle() {
 470                 return $this->mHTMLtitle;
 471         }
 472
 473         /**
 474          * "Page title" means the contents of \<h1\>. It is stored as a valid HTML fragment.
 475          * This function allows good tags like \<sup\> in the \<h1\> tag, but not bad tags like \<script\>.
 476          * This function automatically sets \<title\> to the same content as \<h1\> but with all tags removed.
 477          * Bad tags that were escaped in \<h1\> will still be escaped in \<title\>, and good tags like \<i\> will be dropped entirely.
 478          */
 479         public function setPageTitle( $name ) {
 480                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 481                 # but leave "<i>foobar</i>" alone
 482                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 483                 $this->mPagetitle = $nameWithTags;
 484
 485                 $taction = $this->getPageTitleActionText();
 486                 if( !empty( $taction ) ) {
 487                         $name .= ' - '.$taction;
 488                 }
 489
 490                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 491                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 492         }
 493
 494         /**
 495          * Return the "page title", i.e. the content of the \<h1\> tag.
 496          *
 497          * @return String
 498          */
 499         public function getPageTitle() {
 500                 return $this->mPagetitle;
 501         }
 502
 503         /**
 504          * Set the Title object to use
 505          *
 506          * @param $t Title object
 507          */
 508         public function setTitle( $t ) {
 509                 $this->mTitle = $t;
 510         }
 511
 512         /**
 513          * Get the Title object used in this instance
 514          *
 515          * @return Title
 516          */
 517         public function getTitle() {
 518                 if ( $this->mTitle instanceof Title ) {
 519                         return $this->mTitle;
 520                 } else {
 521                         wfDebug( __METHOD__ . " called and \$mTitle is null. Return \$wgTitle for sanity\n" );
 522                         global $wgTitle;
 523                         return $wgTitle;
 524                 }
 525         }
 526
 527         /**
 528          * Replace the subtile with $str
 529          *
 530          * @param $str String: new value of the subtitle
 531          */
 532         public function setSubtitle( $str ) {
 533                 $this->mSubtitle = /*$this->parse(*/ $str /*)*/; // @bug 2514
 534         }
 535
 536         /**
 537          * Add $str to the subtitle
 538          *
 539          * @param $str String to add to the subtitle
 540          */
 541         public function appendSubtitle( $str ) {
 542                 $this->mSubtitle .= /*$this->parse(*/ $str /*)*/; // @bug 2514
 543         }
 544
 545         /**
 546          * Get the subtitle
 547          *
 548          * @return String
 549          */
 550         public function getSubtitle() {
 551                 return $this->mSubtitle;
 552         }
 553
 554         /**
 555          * Set the page as printable, i.e. it'll be displayed with with all
 556          * print styles included
 557          */
 558         public function setPrintable() {
 559                 $this->mPrintable = true;
 560         }
 561
 562         /**
 563          * Return whether the page is "printable"
 564          *
 565          * @return Boolean
 566          */
 567         public function isPrintable() {
 568                 return $this->mPrintable;
 569         }
 570
 571         /**
 572          * Disable output completely, i.e. calling output() will have no effect
 573          */
 574         public function disable() {
 575                 $this->mDoNothing = true;
 576         }
 577
 578         /**
 579          * Return whether the output will be completely disabled
 580          *
 581          * @return Boolean
 582          */
 583         public function isDisabled() {
 584                 return $this->mDoNothing;
 585         }
 586
 587         /**
 588          * Show an "add new section" link?
 589          *
 590          * @return Boolean
 591          */
 592         public function showNewSectionLink() {
 593                 return $this->mNewSectionLink;
 594         }
 595
 596         /**
 597          * Forcibly hide the new section link?
 598          *
 599          * @return Boolean
 600          */
 601         public function forceHideNewSectionLink() {
 602                 return $this->mHideNewSectionLink;
 603         }
 604
 605         /**
 606          * Add or remove feed links in the page header
 607          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 608          * for the new version
 609          * @see addFeedLink()
 610          *
 611          * @param $show Boolean: true: add default feeds, false: remove all feeds
 612          */
 613         public function setSyndicated( $show = true ) {
 614                 if ( $show ) {
 615                         $this->setFeedAppendQuery( false );
 616                 } else {
 617                         $this->mFeedLinks = array();
 618                 }
 619         }
 620
 621         /**
 622          * Add default feeds to the page header
 623          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 624          * for the new version
 625          * @see addFeedLink()
 626          *
 627          * @param $val String: query to append to feed links or false to output
 628          *        default links
 629          */
 630         public function setFeedAppendQuery( $val ) {
 631                 global $wgAdvertisedFeedTypes;
 632
 633                 $this->mFeedLinks = array();
 634
 635                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 636                         $query = "feed=$type";
 637                         if ( is_string( $val ) ) {
 638                                 $query .= '&' . $val;
 639                         }
 640                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 641                 }
 642         }
 643
 644         /**
 645          * Add a feed link to the page header
 646          *
 647          * @param $format String: feed type, should be a key of $wgFeedClasses
 648          * @param $href String: URL
 649          */
 650         public function addFeedLink( $format, $href ) {
 651                 global $wgAdvertisedFeedTypes;
 652
 653                 if ( in_array( $format, $wgAdvertisedFeedTypes ) ) {
 654                         $this->mFeedLinks[$format] = $href;
 655                 }
 656         }
 657
 658         /**
 659          * Should we output feed links for this page?
 660          * @return Boolean
 661          */
 662         public function isSyndicated() {
 663                 return count( $this->mFeedLinks ) > 0;
 664         }
 665
 666         /**
 667          * Return URLs for each supported syndication format for this page.
 668          * @return array associating format keys with URLs
 669          */
 670         public function getSyndicationLinks() {
 671                 return $this->mFeedLinks;
 672         }
 673
 674         /**
 675          * Will currently always return null
 676          *
 677          * @return null
 678          */
 679         public function getFeedAppendQuery() {
 680                 return $this->mFeedLinksAppendQuery;
 681         }
 682
 683         /**
 684          * Set whether the displayed content is related to the source of the
 685          * corresponding article on the wiki
 686          * Setting true will cause the change "article related" toggle to true
 687          *
 688          * @param $v Boolean
 689          */
 690         public function setArticleFlag( $v ) {
 691                 $this->mIsarticle = $v;
 692                 if ( $v ) {
 693                         $this->mIsArticleRelated = $v;
 694                 }
 695         }
 696
 697         /**
 698          * Return whether the content displayed page is related to the source of
 699          * the corresponding article on the wiki
 700          *
 701          * @return Boolean
 702          */
 703         public function isArticle() {
 704                 return $this->mIsarticle;
 705         }
 706
 707         /**
 708          * Set whether this page is related an article on the wiki
 709          * Setting false will cause the change of "article flag" toggle to false
 710          *
 711          * @param $v Boolean
 712          */
 713         public function setArticleRelated( $v ) {
 714                 $this->mIsArticleRelated = $v;
 715                 if ( !$v ) {
 716                         $this->mIsarticle = false;
 717                 }
 718         }
 719
 720         /**
 721          * Return whether this page is related an article on the wiki
 722          *
 723          * @return Boolean
 724          */
 725         public function isArticleRelated() {
 726                 return $this->mIsArticleRelated;
 727         }
 728
 729         /**
 730          * Add new language links
 731          *
 732          * @param $newLinkArray Associative array mapping language code to the page
 733          *                      name
 734          */
 735         public function addLanguageLinks( $newLinkArray ) {
 736                 $this->mLanguageLinks += $newLinkArray;
 737         }
 738
 739         /**
 740          * Reset the language links and add new language links
 741          *
 742          * @param $newLinkArray Associative array mapping language code to the page
 743          *                      name
 744          */
 745         public function setLanguageLinks( $newLinkArray ) {
 746                 $this->mLanguageLinks = $newLinkArray;
 747         }
 748
 749         /**
 750          * Get the list of language links
 751          *
 752          * @return Associative array mapping language code to the page name
 753          */
 754         public function getLanguageLinks() {
 755                 return $this->mLanguageLinks;
 756         }
 757
 758         /**
 759          * Add an array of categories, with names in the keys
 760          *
 761          * @param $categories Associative array mapping category name to its sort key
 762          */
 763         public function addCategoryLinks( $categories ) {
 764                 global $wgUser, $wgContLang;
 765
 766                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 767                         return;
 768                 }
 769
 770                 # Add the links to a LinkBatch
 771                 $arr = array( NS_CATEGORY => $categories );
 772                 $lb = new LinkBatch;
 773                 $lb->setArray( $arr );
 774
 775                 # Fetch existence plus the hiddencat property
 776                 $dbr = wfGetDB( DB_SLAVE );
 777                 $pageTable = $dbr->tableName( 'page' );
 778                 $where = $lb->constructSet( 'page', $dbr );
 779                 $propsTable = $dbr->tableName( 'page_props' );
 780                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, page_latest, pp_value
 781                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 782                 $res = $dbr->query( $sql, __METHOD__ );
 783
 784                 # Add the results to the link cache
 785                 $lb->addResultToCache( LinkCache::singleton(), $res );
 786
 787                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 788                 $categories = array_combine(
 789                         array_keys( $categories ),
 790                         array_fill( 0, count( $categories ), 'normal' )
 791                 );
 792
 793                 # Mark hidden categories
 794                 foreach ( $res as $row ) {
 795                         if ( isset( $row->pp_value ) ) {
 796                                 $categories[$row->page_title] = 'hidden';
 797                         }
 798                 }
 799
 800                 # Add the remaining categories to the skin
 801                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 802                         $sk = $wgUser->getSkin();
 803                         foreach ( $categories as $category => $type ) {
 804                                 $origcategory = $category;
 805                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 806                                 $wgContLang->findVariantLink( $category, $title, true );
 807                                 if ( $category != $origcategory ) {
 808                                         if ( array_key_exists( $category, $categories ) ) {
 809                                                 continue;
 810                                         }
 811                                 }
 812                                 $text = $wgContLang->convertHtml( $title->getText() );
 813                                 $this->mCategories[] = $title->getText();
 814                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 815                         }
 816                 }
 817         }
 818
 819         /**
 820          * Reset the category links (but not the category list) and add $categories
 821          *
 822          * @param $categories Associative array mapping category name to its sort key
 823          */
 824         public function setCategoryLinks( $categories ) {
 825                 $this->mCategoryLinks = array();
 826                 $this->addCategoryLinks( $categories );
 827         }
 828
 829         /**
 830          * Get the list of category links, in a 2-D array with the following format:
 831          * $arr[$type][] = $link, where $type is either "normal" or "hidden" (for
 832          * hidden categories) and $link a HTML fragment with a link to the category
 833          * page
 834          *
 835          * @return Array
 836          */
 837         public function getCategoryLinks() {
 838                 return $this->mCategoryLinks;
 839         }
 840
 841         /**
 842          * Get the list of category names this page belongs to
 843          *
 844          * @return Array of strings
 845          */
 846         public function getCategories() {
 847                 return $this->mCategories;
 848         }
 849
 850         /**
 851          * Suppress the quickbar from the output, only for skin supporting
 852          * the quickbar
 853          */
 854         public function suppressQuickbar() {
 855                 $this->mSuppressQuickbar = true;
 856         }
 857
 858         /**
 859          * Return whether the quickbar should be suppressed from the output
 860          *
 861          * @return Boolean
 862          */
 863         public function isQuickbarSuppressed() {
 864                 return $this->mSuppressQuickbar;
 865         }
 866
 867         /**
 868          * Remove user JavaScript from scripts to load
 869          */
 870         public function disallowUserJs() {
 871                 $this->mAllowUserJs = false;
 872         }
 873
 874         /**
 875          * Return whether user JavaScript is allowed for this page
 876          *
 877          * @return Boolean
 878          */
 879         public function isUserJsAllowed() {
 880                 return $this->mAllowUserJs;
 881         }
 882
 883         /**
 884          * Prepend $text to the body HTML
 885          *
 886          * @param $text String: HTML
 887          */
 888         public function prependHTML( $text ) {
 889                 $this->mBodytext = $text . $this->mBodytext;
 890         }
 891
 892         /**
 893          * Append $text to the body HTML
 894          *
 895          * @param $text String: HTML
 896          */
 897         public function addHTML( $text ) {
 898                 $this->mBodytext .= $text;
 899         }
 900
 901         /**
 902          * Clear the body HTML
 903          */
 904         public function clearHTML() {
 905                 $this->mBodytext = '';
 906         }
 907
 908         /**
 909          * Get the body HTML
 910          *
 911          * @return String: HTML
 912          */
 913         public function getHTML() {
 914                 return $this->mBodytext;
 915         }
 916
 917         /**
 918          * Add $text to the debug output
 919          *
 920          * @param $text String: debug text
 921          */
 922         public function debug( $text ) {
 923                 $this->mDebugtext .= $text;
 924         }
 925
 926         /**
 927          * @deprecated use parserOptions() instead
 928          */
 929         public function setParserOptions( $options ) {
 930                 wfDeprecated( __METHOD__ );
 931                 return $this->parserOptions( $options );
 932         }
 933
 934         /**
 935          * Get/set the ParserOptions object to use for wikitext parsing
 936          *
 937          * @param $options either the ParserOption to use or null to only get the
 938          *                 current ParserOption object
 939          * @return current ParserOption object
 940          */
 941         public function parserOptions( $options = null ) {
 942                 if ( !$this->mParserOptions ) {
 943                         $this->mParserOptions = new ParserOptions;
 944                 }
 945                 return wfSetVar( $this->mParserOptions, $options );
 946         }
 947
 948         /**
 949          * Set the revision ID which will be seen by the wiki text parser
 950          * for things such as embedded {{REVISIONID}} variable use.
 951          *
 952          * @param $revid Mixed: an positive integer, or null
 953          * @return Mixed: previous value
 954          */
 955         public function setRevisionId( $revid ) {
 956                 $val = is_null( $revid ) ? null : intval( $revid );
 957                 return wfSetVar( $this->mRevisionId, $val );
 958         }
 959
 960         /**
 961          * Get the current revision ID
 962          *
 963          * @return Integer
 964          */
 965         public function getRevisionId() {
 966                 return $this->mRevisionId;
 967         }
 968
 969         /**
 970          * Convert wikitext to HTML and add it to the buffer
 971          * Default assumes that the current page title will be used.
 972          *
 973          * @param $text String
 974          * @param $linestart Boolean: is this the start of a line?
 975          */
 976         public function addWikiText( $text, $linestart = true ) {
 977                 $title = $this->getTitle(); // Work arround E_STRICT
 978                 $this->addWikiTextTitle( $text, $title, $linestart );
 979         }
 980
 981         /**
 982          * Add wikitext with a custom Title object
 983          *
 984          * @param $text String: wikitext
 985          * @param $title Title object
 986          * @param $linestart Boolean: is this the start of a line?
 987          */
 988         public function addWikiTextWithTitle( $text, &$title, $linestart = true ) {
 989                 $this->addWikiTextTitle( $text, $title, $linestart );
 990         }
 991
 992         /**
 993          * Add wikitext with a custom Title object and
 994          *
 995          * @param $text String: wikitext
 996          * @param $title Title object
 997          * @param $linestart Boolean: is this the start of a line?
 998          */
 999         function addWikiTextTitleTidy( $text, &$title, $linestart = true ) {
1000                 $this->addWikiTextTitle( $text, $title, $linestart, true );
1001         }
1002
1003         /**
1004          * Add wikitext with tidy enabled
1005          *
1006          * @param $text String: wikitext
1007          * @param $linestart Boolean: is this the start of a line?
1008          */
1009         public function addWikiTextTidy( $text, $linestart = true ) {
1010                 $title = $this->getTitle();
1011                 $this->addWikiTextTitleTidy( $text, $title, $linestart );
1012         }
1013
1014         /**
1015          * Add wikitext with a custom Title object
1016          *
1017          * @param $text String: wikitext
1018          * @param $title Title object
1019          * @param $linestart Boolean: is this the start of a line?
1020          * @param $tidy Boolean: whether to use tidy
1021          */
1022         public function addWikiTextTitle( $text, &$title, $linestart, $tidy = false ) {
1023                 global $wgParser;
1024
1025                 wfProfileIn( __METHOD__ );
1026
1027                 wfIncrStats( 'pcache_not_possible' );
1028
1029                 $popts = $this->parserOptions();
1030                 $oldTidy = $popts->setTidy( $tidy );
1031
1032                 $parserOutput = $wgParser->parse(
1033                         $text, $title, $popts,
1034                         $linestart, true, $this->mRevisionId
1035                 );
1036
1037                 $popts->setTidy( $oldTidy );
1038
1039                 $this->addParserOutput( $parserOutput );
1040
1041                 wfProfileOut( __METHOD__ );
1042         }
1043
1044         /**
1045          * Add wikitext to the buffer, assuming that this is the primary text for a page view
1046          * Saves the text into the parser cache if possible.
1047          *
1048          * @param $text String: wikitext
1049          * @param $article Article object
1050          * @param $cache Boolean
1051          * @deprecated Use Article::outputWikitext
1052          */
1053         public function addPrimaryWikiText( $text, $article, $cache = true ) {
1054                 global $wgParser;
1055
1056                 wfDeprecated( __METHOD__ );
1057
1058                 $popts = $this->parserOptions();
1059                 $popts->setTidy( true );
1060                 $parserOutput = $wgParser->parse(
1061                         $text, $article->mTitle,
1062                         $popts, true, true, $this->mRevisionId
1063                 );
1064                 $popts->setTidy( false );
1065                 if ( $cache && $article && $parserOutput->isCacheable() ) {
1066                         $parserCache = ParserCache::singleton();
1067                         $parserCache->save( $parserOutput, $article, $popts );
1068                 }
1069
1070                 $this->addParserOutput( $parserOutput );
1071         }
1072
1073         /**
1074          * @deprecated use addWikiTextTidy()
1075          */
1076         public function addSecondaryWikiText( $text, $linestart = true ) {
1077                 wfDeprecated( __METHOD__ );
1078                 $this->addWikiTextTitleTidy( $text, $this->getTitle(), $linestart );
1079         }
1080
1081         /**
1082          * Add a ParserOutput object, but without Html
1083          *
1084          * @param $parserOutput ParserOutput object
1085          */
1086         public function addParserOutputNoText( &$parserOutput ) {
1087                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
1088                 $this->addCategoryLinks( $parserOutput->getCategories() );
1089                 $this->mNewSectionLink = $parserOutput->getNewSection();
1090                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
1091
1092                 $this->mParseWarnings = $parserOutput->getWarnings();
1093                 if ( !$parserOutput->isCacheable() ) {
1094                         $this->enableClientCache( false );
1095                 }
1096                 $this->mNoGallery = $parserOutput->getNoGallery();
1097                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
1098                 // Versioning...
1099                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
1100                         if ( isset( $this->mTemplateIds[$ns] ) ) {
1101                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
1102                         } else {
1103                                 $this->mTemplateIds[$ns] = $dbks;
1104                         }
1105                 }
1106
1107                 // Hooks registered in the object
1108                 global $wgParserOutputHooks;
1109                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
1110                         list( $hookName, $data ) = $hookInfo;
1111                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
1112                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
1113                         }
1114                 }
1115
1116                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
1117         }
1118
1119         /**
1120          * Add a ParserOutput object
1121          *
1122          * @param $parserOutput ParserOutput
1123          */
1124         function addParserOutput( &$parserOutput ) {
1125                 $this->addParserOutputNoText( $parserOutput );
1126                 $text = $parserOutput->getText();
1127                 wfRunHooks( 'OutputPageBeforeHTML', array( &$this, &$text ) );
1128                 $this->addHTML( $text );
1129         }
1130
1131
1132         /**
1133          * Add the output of a QuickTemplate to the output buffer
1134          *
1135          * @param $template QuickTemplate
1136          */
1137         public function addTemplate( &$template ) {
1138                 ob_start();
1139                 $template->execute();
1140                 $this->addHTML( ob_get_contents() );
1141                 ob_end_clean();
1142         }
1143
1144         /**
1145          * Parse wikitext and return the HTML.
1146          *
1147          * @param $text String
1148          * @param $linestart Boolean: is this the start of a line?
1149          * @param $interface Boolean: use interface language ($wgLang instead of
1150          *                   $wgContLang) while parsing language sensitive magic
1151          *                   words like GRAMMAR and PLURAL
1152          * @return String: HTML
1153          */
1154         public function parse( $text, $linestart = true, $interface = false ) {
1155                 global $wgParser;
1156                 if( is_null( $this->getTitle() ) ) {
1157                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
1158                 }
1159                 $popts = $this->parserOptions();
1160                 if ( $interface ) {
1161                         $popts->setInterfaceMessage( true );
1162                 }
1163                 $parserOutput = $wgParser->parse(
1164                         $text, $this->getTitle(), $popts,
1165                         $linestart, true, $this->mRevisionId
1166                 );
1167                 if ( $interface ) {
1168                         $popts->setInterfaceMessage( false );
1169                 }
1170                 return $parserOutput->getText();
1171         }
1172
1173         /**
1174          * Parse wikitext, strip paragraphs, and return the HTML.
1175          *
1176          * @param $text String
1177          * @param $linestart Boolean: is this the start of a line?
1178          * @param $interface Boolean: use interface language ($wgLang instead of
1179          *                   $wgContLang) while parsing language sensitive magic
1180          *                   words like GRAMMAR and PLURAL
1181          * @return String: HTML
1182          */
1183         public function parseInline( $text, $linestart = true, $interface = false ) {
1184                 $parsed = $this->parse( $text, $linestart, $interface );
1185
1186                 $m = array();
1187                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
1188                         $parsed = $m[1];
1189                 }
1190
1191                 return $parsed;
1192         }
1193
1194         /**
1195          * @deprecated
1196          *
1197          * @param $article Article
1198          * @return Boolean: true if successful, else false.
1199          */
1200         public function tryParserCache( &$article ) {
1201                 wfDeprecated( __METHOD__ );
1202                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
1203
1204                 if ( $parserOutput !== false ) {
1205                         $this->addParserOutput( $parserOutput );
1206                         return true;
1207                 } else {
1208                         return false;
1209                 }
1210         }
1211
1212         /**
1213          * Set the value of the "s-maxage" part of the "Cache-control" HTTP header
1214          *
1215          * @param $maxage Integer: maximum cache time on the Squid, in seconds.
1216          */
1217         public function setSquidMaxage( $maxage ) {
1218                 $this->mSquidMaxage = $maxage;
1219         }
1220
1221         /**
1222          * Use enableClientCache(false) to force it to send nocache headers
1223          *
1224          * @param $state ??
1225          */
1226         public function enableClientCache( $state ) {
1227                 return wfSetVar( $this->mEnableClientCache, $state );
1228         }
1229
1230         /**
1231          * Get the list of cookies that will influence on the cache
1232          *
1233          * @return Array
1234          */
1235         function getCacheVaryCookies() {
1236                 global $wgCookiePrefix, $wgCacheVaryCookies;
1237                 static $cookies;
1238                 if ( $cookies === null ) {
1239                         $cookies = array_merge(
1240                                 array(
1241                                         "{$wgCookiePrefix}Token",
1242                                         "{$wgCookiePrefix}LoggedOut",
1243                                         session_name()
1244                                 ),
1245                                 $wgCacheVaryCookies
1246                         );
1247                         wfRunHooks( 'GetCacheVaryCookies', array( $this, &$cookies ) );
1248                 }
1249                 return $cookies;
1250         }
1251
1252         /**
1253          * Return whether this page is not cacheable because "useskin" or "uselang"
1254          * URL parameters were passed.
1255          *
1256          * @return Boolean
1257          */
1258         function uncacheableBecauseRequestVars() {
1259                 global $wgRequest;
1260                 return $wgRequest->getText( 'useskin', false ) === false
1261                         && $wgRequest->getText( 'uselang', false ) === false;
1262         }
1263
1264         /**
1265          * Check if the request has a cache-varying cookie header
1266          * If it does, it's very important that we don't allow public caching
1267          *
1268          * @return Boolean
1269          */
1270         function haveCacheVaryCookies() {
1271                 global $wgRequest;
1272                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
1273                 if ( $cookieHeader === false ) {
1274                         return false;
1275                 }
1276                 $cvCookies = $this->getCacheVaryCookies();
1277                 foreach ( $cvCookies as $cookieName ) {
1278                         # Check for a simple string match, like the way squid does it
1279                         if ( strpos( $cookieHeader, $cookieName ) !== false ) {
1280                                 wfDebug( __METHOD__ . ": found $cookieName\n" );
1281                                 return true;
1282                         }
1283                 }
1284                 wfDebug( __METHOD__ . ": no cache-varying cookies found\n" );
1285                 return false;
1286         }
1287
1288         /**
1289          * Add an HTTP header that will influence on the cache
1290          *
1291          * @param $header String: header name
1292          * @param $option either an Array or null
1293          */
1294         public function addVaryHeader( $header, $option = null ) {
1295                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
1296                         $this->mVaryHeader[$header] = $option;
1297                 } elseif( is_array( $option ) ) {
1298                         if( is_array( $this->mVaryHeader[$header] ) ) {
1299                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
1300                         } else {
1301                                 $this->mVaryHeader[$header] = $option;
1302                         }
1303                 }
1304                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
1305         }
1306
1307         /**
1308          * Get a complete X-Vary-Options header
1309          *
1310          * @return String
1311          */
1312         public function getXVO() {
1313                 $cvCookies = $this->getCacheVaryCookies();
1314
1315                 $cookiesOption = array();
1316                 foreach ( $cvCookies as $cookieName ) {
1317                         $cookiesOption[] = 'string-contains=' . $cookieName;
1318                 }
1319                 $this->addVaryHeader( 'Cookie', $cookiesOption );
1320
1321                 $headers = array();
1322                 foreach( $this->mVaryHeader as $header => $option ) {
1323                         $newheader = $header;
1324                         if( is_array( $option ) ) {
1325                                 $newheader .= ';' . implode( ';', $option );
1326                         }
1327                         $headers[] = $newheader;
1328                 }
1329                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
1330
1331                 return $xvo;
1332         }
1333
1334         /**
1335          * bug 21672: Add Accept-Language to Vary and XVO headers
1336          * if there's no 'variant' parameter existed in GET.
1337          *
1338          * For example:
1339          *   /w/index.php?title=Main_page should always be served; but
1340          *   /w/index.php?title=Main_page&variant=zh-cn should never be served.
1341          */
1342         function addAcceptLanguage() {
1343                 global $wgRequest, $wgContLang;
1344                 if( !$wgRequest->getCheck( 'variant' ) && $wgContLang->hasVariants() ) {
1345                         $variants = $wgContLang->getVariants();
1346                         $aloption = array();
1347                         foreach ( $variants as $variant ) {
1348                                 if( $variant === $wgContLang->getCode() ) {
1349                                         continue;
1350                                 } else {
1351                                         $aloption[] = "string-contains=$variant";
1352                                 }
1353                         }
1354                         $this->addVaryHeader( 'Accept-Language', $aloption );
1355                 }
1356         }
1357
1358         /**
1359          * Send cache control HTTP headers
1360          */
1361         public function sendCacheControl() {
1362                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
1363
1364                 $response = $wgRequest->response();
1365                 if ( $wgUseETag && $this->mETag ) {
1366                         $response->header( "ETag: $this->mETag" );
1367                 }
1368
1369                 $this->addAcceptLanguage();
1370
1371                 # don't serve compressed data to clients who can't handle it
1372                 # maintain different caches for logged-in users and non-logged in ones
1373                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
1374
1375                 if ( $wgUseXVO ) {
1376                         # Add an X-Vary-Options header for Squid with Wikimedia patches
1377                         $response->header( $this->getXVO() );
1378                 }
1379
1380                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
1381                         if(
1382                                 $wgUseSquid && session_id() == '' && !$this->isPrintable() &&
1383                                 $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies()
1384                         )
1385                         {
1386                                 if ( $wgUseESI ) {
1387                                         # We'll purge the proxy cache explicitly, but require end user agents
1388                                         # to revalidate against the proxy on each visit.
1389                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
1390                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
1391                                         # start with a shorter timeout for initial testing
1392                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
1393                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
1394                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
1395                                 } else {
1396                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
1397                                         # to revalidate against the proxy on each visit.
1398                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
1399                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
1400                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
1401                                         # start with a shorter timeout for initial testing
1402                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
1403                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1404                                 }
1405                         } else {
1406                                 # We do want clients to cache if they can, but they *must* check for updates
1407                                 # on revisiting the page.
1408                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1409                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1410                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1411                         }
1412                         if($this->mLastModified) {
1413                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1414                         }
1415                 } else {
1416                         wfDebug( __METHOD__ . ": no caching **\n", false );
1417
1418                         # In general, the absence of a last modified header should be enough to prevent
1419                         # the client from using its cache. We send a few other things just to make sure.
1420                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1421                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1422                         $response->header( 'Pragma: no-cache' );
1423                 }
1424         }
1425
1426         /**
1427          * Get the message associed with the HTTP response code $code
1428          *
1429          * @param $code Integer: status code
1430          * @return String or null: message or null if $code is not in the list of
1431          *         messages
1432          */
1433         public static function getStatusMessage( $code ) {
1434                 static $statusMessage = array(
1435                         100 => 'Continue',
1436                         101 => 'Switching Protocols',
1437                         102 => 'Processing',
1438                         200 => 'OK',
1439                         201 => 'Created',
1440                         202 => 'Accepted',
1441                         203 => 'Non-Authoritative Information',
1442                         204 => 'No Content',
1443                         205 => 'Reset Content',
1444                         206 => 'Partial Content',
1445                         207 => 'Multi-Status',
1446                         300 => 'Multiple Choices',
1447                         301 => 'Moved Permanently',
1448                         302 => 'Found',
1449                         303 => 'See Other',
1450                         304 => 'Not Modified',
1451                         305 => 'Use Proxy',
1452                         307 => 'Temporary Redirect',
1453                         400 => 'Bad Request',
1454                         401 => 'Unauthorized',
1455                         402 => 'Payment Required',
1456                         403 => 'Forbidden',
1457                         404 => 'Not Found',
1458                         405 => 'Method Not Allowed',
1459                         406 => 'Not Acceptable',
1460                         407 => 'Proxy Authentication Required',
1461                         408 => 'Request Timeout',
1462                         409 => 'Conflict',
1463                         410 => 'Gone',
1464                         411 => 'Length Required',
1465                         412 => 'Precondition Failed',
1466                         413 => 'Request Entity Too Large',
1467                         414 => 'Request-URI Too Large',
1468                         415 => 'Unsupported Media Type',
1469                         416 => 'Request Range Not Satisfiable',
1470                         417 => 'Expectation Failed',
1471                         422 => 'Unprocessable Entity',
1472                         423 => 'Locked',
1473                         424 => 'Failed Dependency',
1474                         500 => 'Internal Server Error',
1475                         501 => 'Not Implemented',
1476                         502 => 'Bad Gateway',
1477                         503 => 'Service Unavailable',
1478                         504 => 'Gateway Timeout',
1479                         505 => 'HTTP Version Not Supported',
1480                         507 => 'Insufficient Storage'
1481                 );
1482                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1483         }
1484
1485         /**
1486          * Finally, all the text has been munged and accumulated into
1487          * the object, let's actually output it:
1488          */
1489         public function output() {
1490                 global $wgUser, $wgOutputEncoding, $wgRequest;
1491                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1492                 global $wgUseAjax, $wgAjaxWatch;
1493                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1494                 global $wgArticle, $wgJQueryOnEveryPage;
1495
1496                 if( $this->mDoNothing ) {
1497                         return;
1498                 }
1499                 wfProfileIn( __METHOD__ );
1500                 if ( $this->mRedirect != '' ) {
1501                         # Standards require redirect URLs to be absolute
1502                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1503                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1504                                 if( !$wgDebugRedirects ) {
1505                                         $message = self::getStatusMessage( $this->mRedirectCode );
1506                                         $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1507                                 }
1508                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1509                         }
1510                         $this->sendCacheControl();
1511
1512                         $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
1513                         if( $wgDebugRedirects ) {
1514                                 $url = htmlspecialchars( $this->mRedirect );
1515                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1516                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1517                                 print "</body>\n</html>\n";
1518                         } else {
1519                                 $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
1520                         }
1521                         wfProfileOut( __METHOD__ );
1522                         return;
1523                 } elseif ( $this->mStatusCode ) {
1524                         $message = self::getStatusMessage( $this->mStatusCode );
1525                         if ( $message ) {
1526                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1527                         }
1528                 }
1529
1530                 $sk = $wgUser->getSkin();
1531
1532                 if ( $wgUseAjax ) {
1533                         $this->addScriptFile( 'ajax.js' );
1534
1535                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1536
1537                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1538                                 $this->includeJQuery();
1539                                 $this->addScriptFile( 'ajaxwatch.js' );
1540                         }
1541
1542                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ) {
1543                                 $this->addScriptFile( 'mwsuggest.js' );
1544                         }
1545                 }
1546
1547                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1548                         $this->addScriptFile( 'rightclickedit.js' );
1549                 }
1550
1551                 if( $wgUniversalEditButton ) {
1552                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1553                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1554                                 // Original UniversalEditButton
1555                                 $msg = wfMsg( 'edit' );
1556                                 $this->addLink( array(
1557                                         'rel' => 'alternate',
1558                                         'type' => 'application/x-wiki',
1559                                         'title' => $msg,
1560                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1561                                 ) );
1562                                 // Alternate edit link
1563                                 $this->addLink( array(
1564                                         'rel' => 'edit',
1565                                         'title' => $msg,
1566                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1567                                 ) );
1568                         }
1569                 }
1570
1571                 if ( $wgJQueryOnEveryPage ) {
1572                         $this->includeJQuery();
1573                 }
1574
1575                 # Buffer output; final headers may depend on later processing
1576                 ob_start();
1577
1578                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1579                 $wgRequest->response()->header( 'Content-language: ' . $wgContLanguageCode );
1580
1581                 if ( $this->mArticleBodyOnly ) {
1582                         $this->out( $this->mBodytext );
1583                 } else {
1584                         // Hook that allows last minute changes to the output page, e.g.
1585                         // adding of CSS or Javascript by extensions.
1586                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1587
1588                         wfProfileIn( 'Output-skin' );
1589                         $sk->outputPage( $this );
1590                         wfProfileOut( 'Output-skin' );
1591                 }
1592
1593                 $this->sendCacheControl();
1594                 ob_end_flush();
1595                 wfProfileOut( __METHOD__ );
1596         }
1597
1598         /**
1599          * Actually output something with print(). Performs an iconv to the
1600          * output encoding, if needed.
1601          *
1602          * @param $ins String: the string to output
1603          */
1604         public function out( $ins ) {
1605                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1606                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1607                         $outs = $ins;
1608                 } else {
1609                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1610                         if ( false === $outs ) {
1611                                 $outs = $ins;
1612                         }
1613                 }
1614                 print $outs;
1615         }
1616
1617         /**
1618          * @todo document
1619          */
1620         public static function setEncodings() {
1621                 global $wgInputEncoding, $wgOutputEncoding;
1622
1623                 $wgInputEncoding = strtolower( $wgInputEncoding );
1624
1625                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1626                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1627                         return;
1628                 }
1629                 $wgOutputEncoding = $wgInputEncoding;
1630         }
1631
1632         /**
1633          * @deprecated use wfReportTime() instead.
1634          *
1635          * @return String
1636          */
1637         public function reportTime() {
1638                 wfDeprecated( __METHOD__ );
1639                 $time = wfReportTime();
1640                 return $time;
1641         }
1642
1643         /**
1644          * Produce a "user is blocked" page.
1645          *
1646          * @param $return Boolean: whether to have a "return to $wgTitle" message or not.
1647          * @return nothing
1648          */
1649         function blockedPage( $return = true ) {
1650                 global $wgUser, $wgContLang, $wgLang;
1651
1652                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1653                 $this->setRobotPolicy( 'noindex,nofollow' );
1654                 $this->setArticleRelated( false );
1655
1656                 $name = User::whoIs( $wgUser->blockedBy() );
1657                 $reason = $wgUser->blockedFor();
1658                 if( $reason == '' ) {
1659                         $reason = wfMsg( 'blockednoreason' );
1660                 }
1661                 $blockTimestamp = $wgLang->timeanddate(
1662                         wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true
1663                 );
1664                 $ip = wfGetIP();
1665
1666                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1667
1668                 $blockid = $wgUser->mBlock->mId;
1669
1670                 $blockExpiry = $wgUser->mBlock->mExpiry;
1671                 if ( $blockExpiry == 'infinity' ) {
1672                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1673                         // Search for localization in 'ipboptions'
1674                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1675                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1676                                 if ( strpos( $option, ':' ) === false ) {
1677                                         continue;
1678                                 }
1679                                 list( $show, $value ) = explode( ':', $option );
1680                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1681                                         $blockExpiry = $show;
1682                                         break;
1683                                 }
1684                         }
1685                 } else {
1686                         $blockExpiry = $wgLang->timeanddate(
1687                                 wfTimestamp( TS_MW, $blockExpiry ),
1688                                 true
1689                         );
1690                 }
1691
1692                 if ( $wgUser->mBlock->mAuto ) {
1693                         $msg = 'autoblockedtext';
1694                 } else {
1695                         $msg = 'blockedtext';
1696                 }
1697
1698                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1699                  * This could be a username, an IP range, or a single IP. */
1700                 $intended = $wgUser->mBlock->mAddress;
1701
1702                 $this->addWikiMsg(
1703                         $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry,
1704                         $intended, $blockTimestamp
1705                 );
1706
1707                 # Don't auto-return to special pages
1708                 if( $return ) {
1709                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1710                         $this->returnToMain( null, $return );
1711                 }
1712         }
1713
1714         /**
1715          * Output a standard error page
1716          *
1717          * @param $title String: message key for page title
1718          * @param $msg String: message key for page text
1719          * @param $params Array: message parameters
1720          */
1721         public function showErrorPage( $title, $msg, $params = array() ) {
1722                 if ( $this->getTitle() ) {
1723                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1724                 }
1725                 $this->setPageTitle( wfMsg( $title ) );
1726                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1727                 $this->setRobotPolicy( 'noindex,nofollow' );
1728                 $this->setArticleRelated( false );
1729                 $this->enableClientCache( false );
1730                 $this->mRedirect = '';
1731                 $this->mBodytext = '';
1732
1733                 array_unshift( $params, 'parse' );
1734                 array_unshift( $params, $msg );
1735                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1736
1737                 $this->returnToMain();
1738         }
1739
1740         /**
1741          * Output a standard permission error page
1742          *
1743          * @param $errors Array: error message keys
1744          * @param $action String: action that was denied or null if unknown
1745          */
1746         public function showPermissionsErrorPage( $errors, $action = null ) {
1747                 $this->mDebugtext .= 'Original title: ' .
1748                 $this->getTitle()->getPrefixedText() . "\n";
1749                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1750                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1751                 $this->setRobotPolicy( 'noindex,nofollow' );
1752                 $this->setArticleRelated( false );
1753                 $this->enableClientCache( false );
1754                 $this->mRedirect = '';
1755                 $this->mBodytext = '';
1756                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1757         }
1758
1759         /**
1760          * Display an error page indicating that a given version of MediaWiki is
1761          * required to use it
1762          *
1763          * @param $version Mixed: the version of MediaWiki needed to use the page
1764          */
1765         public function versionRequired( $version ) {
1766                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1767                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1768                 $this->setRobotPolicy( 'noindex,nofollow' );
1769                 $this->setArticleRelated( false );
1770                 $this->mBodytext = '';
1771
1772                 $this->addWikiMsg( 'versionrequiredtext', $version );
1773                 $this->returnToMain();
1774         }
1775
1776         /**
1777          * Display an error page noting that a given permission bit is required.
1778          *
1779          * @param $permission String: key required
1780          */
1781         public function permissionRequired( $permission ) {
1782                 global $wgLang;
1783
1784                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1785                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1786                 $this->setRobotPolicy( 'noindex,nofollow' );
1787                 $this->setArticleRelated( false );
1788                 $this->mBodytext = '';
1789
1790                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1791                         User::getGroupsWithPermission( $permission ) );
1792                 if( $groups ) {
1793                         $this->addWikiMsg(
1794                                 'badaccess-groups',
1795                                 $wgLang->commaList( $groups ),
1796                                 count( $groups )
1797                         );
1798                 } else {
1799                         $this->addWikiMsg( 'badaccess-group0' );
1800                 }
1801                 $this->returnToMain();
1802         }
1803
1804         /**
1805          * Produce the stock "please login to use the wiki" page
1806          */
1807         public function loginToUse() {
1808                 global $wgUser;
1809
1810                 if( $wgUser->isLoggedIn() ) {
1811                         $this->permissionRequired( 'read' );
1812                         return;
1813                 }
1814
1815                 $skin = $wgUser->getSkin();
1816
1817                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1818                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1819                 $this->setRobotPolicy( 'noindex,nofollow' );
1820                 $this->setArticleFlag( false );
1821
1822                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1823                 $loginLink = $skin->link(
1824                         $loginTitle,
1825                         wfMsgHtml( 'loginreqlink' ),
1826                         array(),
1827                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1828                         array( 'known', 'noclasses' )
1829                 );
1830                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1831                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . '-->' );
1832
1833                 # Don't return to the main page if the user can't read it
1834                 # otherwise we'll end up in a pointless loop
1835                 $mainPage = Title::newMainPage();
1836                 if( $mainPage->userCanRead() ) {
1837                         $this->returnToMain( null, $mainPage );
1838                 }
1839         }
1840
1841         /**
1842          * Format a list of error messages
1843          *
1844          * @param $errors An array of arrays returned by Title::getUserPermissionsErrors
1845          * @param $action String: action that was denied or null if unknown
1846          * @return String: the wikitext error-messages, formatted into a list.
1847          */
1848         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1849                 if ( $action == null ) {
1850                         $text = wfMsgNoTrans( 'permissionserrorstext', count( $errors ) ) . "\n\n";
1851                 } else {
1852                         $action_desc = wfMsgNoTrans( "action-$action" );
1853                         $text = wfMsgNoTrans(
1854                                 'permissionserrorstext-withaction',
1855                                 count( $errors ),
1856                                 $action_desc
1857                         ) . "\n\n";
1858                 }
1859
1860                 if ( count( $errors ) > 1 ) {
1861                         $text .= '<ul class="permissions-errors">' . "\n";
1862
1863                         foreach( $errors as $error ) {
1864                                 $text .= '<li>';
1865                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1866                                 $text .= "</li>\n";
1867                         }
1868                         $text .= '</ul>';
1869                 } else {
1870                         $text .= "<div class=\"permissions-errors\">\n" .
1871                                         call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) .
1872                                         "\n</div>";
1873                 }
1874
1875                 return $text;
1876         }
1877
1878         /**
1879          * Display a page stating that the Wiki is in read-only mode,
1880          * and optionally show the source of the page that the user
1881          * was trying to edit.  Should only be called (for this
1882          * purpose) after wfReadOnly() has returned true.
1883          *
1884          * For historical reasons, this function is _also_ used to
1885          * show the error message when a user tries to edit a page
1886          * they are not allowed to edit.  (Unless it's because they're
1887          * blocked, then we show blockedPage() instead.)  In this
1888          * case, the second parameter should be set to true and a list
1889          * of reasons supplied as the third parameter.
1890          *
1891          * @todo Needs to be split into multiple functions.
1892          *
1893          * @param $source    String: source code to show (or null).
1894          * @param $protected Boolean: is this a permissions error?
1895          * @param $reasons   Array: list of reasons for this error, as returned by Title::getUserPermissionsErrors().
1896          * @param $action    String: action that was denied or null if unknown
1897          */
1898         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1899                 global $wgUser;
1900                 $skin = $wgUser->getSkin();
1901
1902                 $this->setRobotPolicy( 'noindex,nofollow' );
1903                 $this->setArticleRelated( false );
1904
1905                 // If no reason is given, just supply a default "I can't let you do
1906                 // that, Dave" message.  Should only occur if called by legacy code.
1907                 if ( $protected && empty( $reasons ) ) {
1908                         $reasons[] = array( 'badaccess-group0' );
1909                 }
1910
1911                 if ( !empty( $reasons ) ) {
1912                         // Permissions error
1913                         if( $source ) {
1914                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1915                                 $this->setSubtitle(
1916                                         wfMsg( 'viewsourcefor', $skin->linkKnown( $this->getTitle() ) )
1917                                 );
1918                         } else {
1919                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1920                         }
1921                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1922                 } else {
1923                         // Wiki is read only
1924                         $this->setPageTitle( wfMsg( 'readonly' ) );
1925                         $reason = wfReadOnlyReason();
1926                         $this->wrapWikiMsg( "<div class='mw-readonly-error'>\n$1\n</div>", array( 'readonlytext', $reason ) );
1927                 }
1928
1929                 // Show source, if supplied
1930                 if( is_string( $source ) ) {
1931                         $this->addWikiMsg( 'viewsourcetext' );
1932
1933                         $params = array(
1934                                 'id'   => 'wpTextbox1',
1935                                 'name' => 'wpTextbox1',
1936                                 'cols' => $wgUser->getOption( 'cols' ),
1937                                 'rows' => $wgUser->getOption( 'rows' ),
1938                                 'readonly' => 'readonly'
1939                         );
1940                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1941
1942                         // Show templates used by this article
1943                         $skin = $wgUser->getSkin();
1944                         $article = new Article( $this->getTitle() );
1945                         $this->addHTML( "<div class='templatesUsed'>
1946 {$skin->formatTemplates( $article->getUsedTemplates() )}
1947 </div>
1948 " );
1949                 }
1950
1951                 # If the title doesn't exist, it's fairly pointless to print a return
1952                 # link to it.  After all, you just tried editing it and couldn't, so
1953                 # what's there to do there?
1954                 if( $this->getTitle()->exists() ) {
1955                         $this->returnToMain( null, $this->getTitle() );
1956                 }
1957         }
1958
1959         /**
1960          * Adds JS-based password security checker
1961          * @param $passwordId String ID of input box containing password
1962          * @param $retypeId String ID of input box containing retyped password
1963          * @return none
1964          */
1965         public function addPasswordSecurity( $passwordId, $retypeId ) {
1966                 $this->includeJQuery();
1967                 $data = array(
1968                         'password' => '#' . $passwordId,
1969                         'retype' => '#' . $retypeId,
1970                         'messages' => array(),
1971                 );
1972                 foreach ( array( 'password-strength', 'password-strength-bad', 'password-strength-mediocre',
1973                                 'password-strength-acceptable', 'password-strength-good', 'password-retype', 'password-retype-mismatch'
1974                         ) as $message ) {
1975                         $data['messages'][$message] = wfMsg( $message );
1976                 }
1977                 $this->addScript( Html::inlineScript( 'var passwordSecurity=' . FormatJson::encode( $data ) ) );
1978                 $this->addScriptFile( 'password.js' );
1979                 $this->addStyle( 'common/password.css' );
1980         }
1981
1982         /** @deprecated */
1983         public function errorpage( $title, $msg ) {
1984                 wfDeprecated( __METHOD__ );
1985                 throw new ErrorPageError( $title, $msg );
1986         }
1987
1988         /** @deprecated */
1989         public function databaseError( $fname, $sql, $error, $errno ) {
1990                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1991         }
1992
1993         /** @deprecated */
1994         public function fatalError( $message ) {
1995                 wfDeprecated( __METHOD__ );
1996                 throw new FatalError( $message );
1997         }
1998
1999         /** @deprecated */
2000         public function unexpectedValueError( $name, $val ) {
2001                 wfDeprecated( __METHOD__ );
2002                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
2003         }
2004
2005         /** @deprecated */
2006         public function fileCopyError( $old, $new ) {
2007                 wfDeprecated( __METHOD__ );
2008                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
2009         }
2010
2011         /** @deprecated */
2012         public function fileRenameError( $old, $new ) {
2013                 wfDeprecated( __METHOD__ );
2014                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
2015         }
2016
2017         /** @deprecated */
2018         public function fileDeleteError( $name ) {
2019                 wfDeprecated( __METHOD__ );
2020                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
2021         }
2022
2023         /** @deprecated */
2024         public function fileNotFoundError( $name ) {
2025                 wfDeprecated( __METHOD__ );
2026                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
2027         }
2028
2029         public function showFatalError( $message ) {
2030                 $this->setPageTitle( wfMsg( 'internalerror' ) );
2031                 $this->setRobotPolicy( 'noindex,nofollow' );
2032                 $this->setArticleRelated( false );
2033                 $this->enableClientCache( false );
2034                 $this->mRedirect = '';
2035                 $this->mBodytext = $message;
2036         }
2037
2038         public function showUnexpectedValueError( $name, $val ) {
2039                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
2040         }
2041
2042         public function showFileCopyError( $old, $new ) {
2043                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
2044         }
2045
2046         public function showFileRenameError( $old, $new ) {
2047                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
2048         }
2049
2050         public function showFileDeleteError( $name ) {
2051                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
2052         }
2053
2054         public function showFileNotFoundError( $name ) {
2055                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
2056         }
2057
2058         /**
2059          * Add a "return to" link pointing to a specified title
2060          *
2061          * @param $title Title to link
2062          * @param $query String: query string
2063          * @param $text String text of the link (input is not escaped)
2064          */
2065         public function addReturnTo( $title, $query = array(), $text = null ) {
2066                 global $wgUser;
2067                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullURL() ) );
2068                 $link = wfMsgHtml(
2069                         'returnto',
2070                         $wgUser->getSkin()->link( $title, $text, array(), $query )
2071                 );
2072                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
2073         }
2074
2075         /**
2076          * Add a "return to" link pointing to a specified title,
2077          * or the title indicated in the request, or else the main page
2078          *
2079          * @param $unused No longer used
2080          * @param $returnto Title or String to return to
2081          * @param $returntoquery String: query string for the return to link
2082          */
2083         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
2084                 global $wgRequest;
2085
2086                 if ( $returnto == null ) {
2087                         $returnto = $wgRequest->getText( 'returnto' );
2088                 }
2089
2090                 if ( $returntoquery == null ) {
2091                         $returntoquery = $wgRequest->getText( 'returntoquery' );
2092                 }
2093
2094                 if ( $returnto === '' ) {
2095                         $returnto = Title::newMainPage();
2096                 }
2097
2098                 if ( is_object( $returnto ) ) {
2099                         $titleObj = $returnto;
2100                 } else {
2101                         $titleObj = Title::newFromText( $returnto );
2102                 }
2103                 if ( !is_object( $titleObj ) ) {
2104                         $titleObj = Title::newMainPage();
2105                 }
2106
2107                 $this->addReturnTo( $titleObj, $returntoquery );
2108         }
2109
2110         /**
2111          * @param $sk Skin The given Skin
2112          * @param $includeStyle Boolean: unused
2113          * @return String: The doctype, opening <html>, and head element.
2114          */
2115         public function headElement( Skin $sk, $includeStyle = true ) {
2116                 global $wgOutputEncoding, $wgMimeType;
2117                 global $wgUseTrackbacks, $wgHtml5;
2118                 global $wgUser, $wgRequest, $wgLang;
2119
2120                 if ( $sk->commonPrintStylesheet() ) {
2121                         $this->addStyle( 'common/wikiprintable.css', 'print' );
2122                 }
2123                 $sk->setupUserCss( $this );
2124
2125                 $ret = Html::htmlHeader( array( 'lang' => wfUILang()->getCode() ) );
2126
2127                 if ( $this->getHTMLTitle() == '' ) {
2128                         $this->setHTMLTitle( wfMsg( 'pagetitle', $this->getPageTitle() ) );
2129                 }
2130
2131                 $openHead = Html::openElement( 'head' );
2132                 if ( $openHead ) {
2133                         # Don't bother with the newline if $head == ''
2134                         $ret .= "$openHead\n";
2135                 }
2136
2137                 if ( $wgHtml5 ) {
2138                         # More succinct than <meta http-equiv=Content-Type>, has the
2139                         # same effect
2140                         $ret .= Html::element( 'meta', array( 'charset' => $wgOutputEncoding ) ) . "\n";
2141                 } else {
2142                         $this->addMeta( 'http:Content-Type', "$wgMimeType; charset=$wgOutputEncoding" );
2143                 }
2144
2145                 $ret .= Html::element( 'title', null, $this->getHTMLTitle() ) . "\n";
2146
2147                 $ret .= implode( "\n", array(
2148                         $this->getHeadLinks(),
2149                         $this->buildCssLinks(),
2150                         $this->getHeadScripts( $sk ) . $this->getHeadItems(),
2151                 ) );
2152                 if ( $sk->usercss ) {
2153                         $ret .= Html::inlineStyle( $sk->usercss );
2154                 }
2155
2156                 if ( $wgUseTrackbacks && $this->isArticleRelated() ) {
2157                         $ret .= $this->getTitle()->trackbackRDF();
2158                 }
2159
2160                 $closeHead = Html::closeElement( 'head' );
2161                 if ( $closeHead ) {
2162                         $ret .= "$closeHead\n";
2163                 }
2164
2165                 $bodyAttrs = array();
2166
2167                 # Crazy edit-on-double-click stuff
2168                 $action = $wgRequest->getVal( 'action', 'view' );
2169
2170                 if (
2171                         $this->getTitle()->getNamespace() != NS_SPECIAL &&
2172                         !in_array( $action, array( 'edit', 'submit' ) ) &&
2173                         $wgUser->getOption( 'editondblclick' )
2174                 )
2175                 {
2176                         $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
2177                 }
2178
2179                 # Class bloat
2180                 $dir = wfUILang()->getDir();
2181                 $bodyAttrs['class'] = "mediawiki $dir";
2182
2183                 if ( $wgLang->capitalizeAllNouns() ) {
2184                         # A <body> class is probably not the best way to do this . . .
2185                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
2186                 }
2187                 $bodyAttrs['class'] .= ' ns-' . $this->getTitle()->getNamespace();
2188                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
2189                         $bodyAttrs['class'] .= ' ns-special';
2190                 } elseif ( $this->getTitle()->isTalkPage() ) {
2191                         $bodyAttrs['class'] .= ' ns-talk';
2192                 } else {
2193                         $bodyAttrs['class'] .= ' ns-subject';
2194                 }
2195                 $bodyAttrs['class'] .= ' ' . Sanitizer::escapeClass( 'page-' . $this->getTitle()->getPrefixedText() );
2196                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $wgUser->getSkin()->getSkinName() );
2197
2198                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
2199
2200                 return $ret;
2201         }
2202
2203         /**
2204          * Gets the global variables and mScripts; also adds userjs to the end if
2205          * enabled
2206          *
2207          * @param $sk Skin object to use
2208          * @return String: HTML fragment
2209          */
2210         function getHeadScripts( Skin $sk ) {
2211                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
2212                 global $wgStylePath, $wgStyleVersion;
2213
2214                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() ) . "\n";
2215                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
2216
2217                 // add site JS if enabled
2218                 if( $wgUseSiteJs ) {
2219                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
2220                         $this->addScriptFile(
2221                                 Skin::makeUrl(
2222                                         '-',
2223                                         "action=raw$jsCache&gen=js&useskin=" .
2224                                         urlencode( $sk->getSkinName() )
2225                                 )
2226                         );
2227                 }
2228
2229                 // add user JS if enabled
2230                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
2231                         $action = $wgRequest->getVal( 'action', 'view' );
2232                         if( $this->mTitle && $this->mTitle->isJsSubpage() && $sk->userCanPreview( $action ) ) {
2233                                 # XXX: additional security check/prompt?
2234                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
2235                         } else {
2236                                 $userpage = $wgUser->getUserPage();
2237                                 $names = array( 'common', $sk->getSkinName() );
2238                                 foreach( $names as $name ) {
2239                                         $scriptpage = Title::makeTitleSafe(
2240                                                 NS_USER,
2241                                                 $userpage->getDBkey() . '/' . $name . '.js'
2242                                         );
2243                                         if ( $scriptpage && $scriptpage->exists() && ( $scriptpage->getLength() > 0 ) ) {
2244                                                 $userjs = $scriptpage->getLocalURL( 'action=raw&ctype=' . $wgJsMimeType );
2245                                                 $this->addScriptFile( $userjs, $scriptpage->getLatestRevID() );
2246                                         }
2247                                 }
2248                         }
2249                 }
2250
2251                 $scripts .= "\n" . $this->mScripts;
2252                 return $scripts;
2253         }
2254
2255         /**
2256          * Add default \<meta\> tags
2257          */
2258         protected function addDefaultMeta() {
2259                 global $wgVersion, $wgHtml5;
2260
2261                 static $called = false;
2262                 if ( $called ) {
2263                         # Don't run this twice
2264                         return;
2265                 }
2266                 $called = true;
2267
2268                 if ( !$wgHtml5 ) {
2269                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); // bug 15835
2270                 }
2271                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
2272
2273                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
2274                 if( $p !== 'index,follow' ) {
2275                         // http://www.robotstxt.org/wc/meta-user.html
2276                         // Only show if it's different from the default robots policy
2277                         $this->addMeta( 'robots', $p );
2278                 }
2279
2280                 if ( count( $this->mKeywords ) > 0 ) {
2281                         $strip = array(
2282                                 "/<.*?" . ">/" => '',
2283                                 "/_/" => ' '
2284                         );
2285                         $this->addMeta(
2286                                 'keywords',
2287                                 preg_replace(
2288                                         array_keys( $strip ),
2289                                         array_values( $strip ),
2290                                         implode( ',', $this->mKeywords )
2291                                 )
2292                         );
2293                 }
2294         }
2295
2296         /**
2297          * @return string HTML tag links to be put in the header.
2298          */
2299         public function getHeadLinks() {
2300                 global $wgFeed;
2301
2302                 // Ideally this should happen earlier, somewhere. :P
2303                 $this->addDefaultMeta();
2304
2305                 $tags = array();
2306
2307                 foreach ( $this->mMetatags as $tag ) {
2308                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
2309                                 $a = 'http-equiv';
2310                                 $tag[0] = substr( $tag[0], 5 );
2311                         } else {
2312                                 $a = 'name';
2313                         }
2314                         $tags[] = Html::element( 'meta',
2315                                 array(
2316                                         $a => $tag[0],
2317                                         'content' => $tag[1]
2318                                 )
2319                         );
2320                 }
2321                 foreach ( $this->mLinktags as $tag ) {
2322                         $tags[] = Html::element( 'link', $tag );
2323                 }
2324
2325                 if( $wgFeed ) {
2326                         foreach( $this->getSyndicationLinks() as $format => $link ) {
2327                                 # Use the page name for the title (accessed through $wgTitle since
2328                                 # there's no other way).  In principle, this could lead to issues
2329                                 # with having the same name for different feeds corresponding to
2330                                 # the same page, but we can't avoid that at this low a level.
2331
2332                                 $tags[] = $this->feedLink(
2333                                         $format,
2334                                         $link,
2335                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
2336                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() )
2337                                 );
2338                         }
2339
2340                         # Recent changes feed should appear on every page (except recentchanges,
2341                         # that would be redundant). Put it after the per-page feed to avoid
2342                         # changing existing behavior. It's still available, probably via a
2343                         # menu in your browser. Some sites might have a different feed they'd
2344                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
2345                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
2346                         # If so, use it instead.
2347
2348                         global $wgOverrideSiteFeed, $wgSitename, $wgAdvertisedFeedTypes;
2349                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
2350
2351                         if ( $wgOverrideSiteFeed ) {
2352                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
2353                                         $tags[] = $this->feedLink(
2354                                                 $type,
2355                                                 htmlspecialchars( $feedUrl ),
2356                                                 wfMsg( "site-{$type}-feed", $wgSitename )
2357                                         );
2358                                 }
2359                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
2360                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
2361                                         $tags[] = $this->feedLink(
2362                                                 $format,
2363                                                 $rctitle->getLocalURL( "feed={$format}" ),
2364                                                 wfMsg( "site-{$format}-feed", $wgSitename ) # For grep: 'site-rss-feed', 'site-atom-feed'.
2365                                         );
2366                                 }
2367                         }
2368                 }
2369
2370                 return implode( "\n", $tags );
2371         }
2372
2373         /**
2374          * Generate a <link rel/> for a feed.
2375          *
2376          * @param $type String: feed type
2377          * @param $url String: URL to the feed
2378          * @param $text String: value of the "title" attribute
2379          * @return String: HTML fragment
2380          */
2381         private function feedLink( $type, $url, $text ) {
2382                 return Html::element( 'link', array(
2383                         'rel' => 'alternate',
2384                         'type' => "application/$type+xml",
2385                         'title' => $text,
2386                         'href' => $url )
2387                 );
2388         }
2389
2390         /**
2391          * Add a local or specified stylesheet, with the given media options.
2392          * Meant primarily for internal use...
2393          *
2394          * @param $style String: URL to the file
2395          * @param $media String: to specify a media type, 'screen', 'printable', 'handheld' or any.
2396          * @param $condition String: for IE conditional comments, specifying an IE version
2397          * @param $dir String: set to 'rtl' or 'ltr' for direction-specific sheets
2398          */
2399         public function addStyle( $style, $media = '', $condition = '', $dir = '' ) {
2400                 $options = array();
2401                 // Even though we expect the media type to be lowercase, but here we
2402                 // force it to lowercase to be safe.
2403                 if( $media ) {
2404                         $options['media'] = $media;
2405                 }
2406                 if( $condition ) {
2407                         $options['condition'] = $condition;
2408                 }
2409                 if( $dir ) {
2410                         $options['dir'] = $dir;
2411                 }
2412                 $this->styles[$style] = $options;
2413         }
2414
2415         /**
2416          * Adds inline CSS styles
2417          * @param $style_css Mixed: inline CSS
2418          */
2419         public function addInlineStyle( $style_css ){
2420                 $this->mScripts .= Html::inlineStyle( $style_css );
2421         }
2422
2423         /**
2424          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
2425          * These will be applied to various media & IE conditionals.
2426          */
2427         public function buildCssLinks() {
2428                 return implode( "\n", $this->buildCssLinksArray() );
2429         }
2430
2431         public function buildCssLinksArray() {
2432                 $links = array();
2433                 foreach( $this->styles as $file => $options ) {
2434                         $link = $this->styleLink( $file, $options );
2435                         if( $link ) {
2436                                 $links[$file] = $link;
2437                         }
2438                 }
2439                 return $links;
2440         }
2441
2442         /**
2443          * Generate \<link\> tags for stylesheets
2444          *
2445          * @param $style String: URL to the file
2446          * @param $options Array: option, can contain 'condition', 'dir', 'media'
2447          *                 keys
2448          * @return String: HTML fragment
2449          */
2450         protected function styleLink( $style, $options ) {
2451                 if( isset( $options['dir'] ) ) {
2452                         $siteDir = wfUILang()->getDir();
2453                         if( $siteDir != $options['dir'] ) {
2454                                 return '';
2455                         }
2456                 }
2457
2458                 if( isset( $options['media'] ) ) {
2459                         $media = $this->transformCssMedia( $options['media'] );
2460                         if( is_null( $media ) ) {
2461                                 return '';
2462                         }
2463                 } else {
2464                         $media = 'all';
2465                 }
2466
2467                 if( substr( $style, 0, 1 ) == '/' ||
2468                         substr( $style, 0, 5 ) == 'http:' ||
2469                         substr( $style, 0, 6 ) == 'https:' ) {
2470                         $url = $style;
2471                 } else {
2472                         global $wgStylePath, $wgStyleVersion;
2473                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
2474                 }
2475
2476                 $link = Html::linkedStyle( $url, $media );
2477
2478                 if( isset( $options['condition'] ) ) {
2479                         $condition = htmlspecialchars( $options['condition'] );
2480                         $link = "<!--[if $condition]>$link<![endif]-->";
2481                 }
2482                 return $link;
2483         }
2484
2485         /**
2486          * Transform "media" attribute based on request parameters
2487          *
2488          * @param $media String: current value of the "media" attribute
2489          * @return String: modified value of the "media" attribute
2490          */
2491         function transformCssMedia( $media ) {
2492                 global $wgRequest, $wgHandheldForIPhone;
2493
2494                 // Switch in on-screen display for media testing
2495                 $switches = array(
2496                         'printable' => 'print',
2497                         'handheld' => 'handheld',
2498                 );
2499                 foreach( $switches as $switch => $targetMedia ) {
2500                         if( $wgRequest->getBool( $switch ) ) {
2501                                 if( $media == $targetMedia ) {
2502                                         $media = '';
2503                                 } elseif( $media == 'screen' ) {
2504                                         return null;
2505                                 }
2506                         }
2507                 }
2508
2509                 // Expand longer media queries as iPhone doesn't grok 'handheld'
2510                 if( $wgHandheldForIPhone ) {
2511                         $mediaAliases = array(
2512                                 'screen' => 'screen and (min-device-width: 481px)',
2513                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
2514                         );
2515
2516                         if( isset( $mediaAliases[$media] ) ) {
2517                                 $media = $mediaAliases[$media];
2518                         }
2519                 }
2520
2521                 return $media;
2522         }
2523
2524         /**
2525          * Turn off regular page output and return an error reponse
2526          * for when rate limiting has triggered.
2527          */
2528         public function rateLimited() {
2529                 $this->setPageTitle( wfMsg( 'actionthrottled' ) );
2530                 $this->setRobotPolicy( 'noindex,follow' );
2531                 $this->setArticleRelated( false );
2532                 $this->enableClientCache( false );
2533                 $this->mRedirect = '';
2534                 $this->clearHTML();
2535                 $this->setStatusCode( 503 );
2536                 $this->addWikiMsg( 'actionthrottledtext' );
2537
2538                 $this->returnToMain( null, $this->getTitle() );
2539         }
2540
2541         /**
2542          * Show a warning about slave lag
2543          *
2544          * If the lag is higher than $wgSlaveLagCritical seconds,
2545          * then the warning is a bit more obvious. If the lag is
2546          * lower than $wgSlaveLagWarning, then no warning is shown.
2547          *
2548          * @param $lag Integer: slave lag
2549          */
2550         public function showLagWarning( $lag ) {
2551                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
2552                 if( $lag >= $wgSlaveLagWarning ) {
2553                         $message = $lag < $wgSlaveLagCritical
2554                                 ? 'lag-warn-normal'
2555                                 : 'lag-warn-high';
2556                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2557                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2558                 }
2559         }
2560
2561         /**
2562          * Add a wikitext-formatted message to the output.
2563          * This is equivalent to:
2564          *
2565          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2566          */
2567         public function addWikiMsg( /*...*/ ) {
2568                 $args = func_get_args();
2569                 $name = array_shift( $args );
2570                 $this->addWikiMsgArray( $name, $args );
2571         }
2572
2573         /**
2574          * Add a wikitext-formatted message to the output.
2575          * Like addWikiMsg() except the parameters are taken as an array
2576          * instead of a variable argument list.
2577          *
2578          * $options is passed through to wfMsgExt(), see that function for details.
2579          */
2580         public function addWikiMsgArray( $name, $args, $options = array() ) {
2581                 $options[] = 'parse';
2582                 $text = wfMsgExt( $name, $options, $args );
2583                 $this->addHTML( $text );
2584         }
2585
2586         /**
2587          * This function takes a number of message/argument specifications, wraps them in
2588          * some overall structure, and then parses the result and adds it to the output.
2589          *
2590          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2591          * on. The subsequent arguments may either be strings, in which case they are the
2592          * message names, or arrays, in which case the first element is the message name,
2593          * and subsequent elements are the parameters to that message.
2594          *
2595          * The special named parameter 'options' in a message specification array is passed
2596          * through to the $options parameter of wfMsgExt().
2597          *
2598          * Don't use this for messages that are not in users interface language.
2599          *
2600          * For example:
2601          *
2602          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>", 'some-error' );
2603          *
2604          * Is equivalent to:
2605          *
2606          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . "\n</div>" );
2607          *
2608          * The newline after opening div is needed in some wikitext. See bug 19226.
2609          */
2610         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2611                 $msgSpecs = func_get_args();
2612                 array_shift( $msgSpecs );
2613                 $msgSpecs = array_values( $msgSpecs );
2614                 $s = $wrap;
2615                 foreach ( $msgSpecs as $n => $spec ) {
2616                         $options = array();
2617                         if ( is_array( $spec ) ) {
2618                                 $args = $spec;
2619                                 $name = array_shift( $args );
2620                                 if ( isset( $args['options'] ) ) {
2621                                         $options = $args['options'];
2622                                         unset( $args['options'] );
2623                                 }
2624                         }  else {
2625                                 $args = array();
2626                                 $name = $spec;
2627                         }
2628                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2629                 }
2630                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2631         }
2632
2633         /**
2634          * Include jQuery core. Use this to avoid loading it multiple times
2635          * before we get a usable script loader.
2636          *
2637          * @param $modules Array: list of jQuery modules which should be loaded
2638          * @return Array: the list of modules which were not loaded.
2639          * @since 1.16
2640          */
2641         public function includeJQuery( $modules = array() ) {
2642                 global $wgStylePath, $wgStyleVersion, $wgJQueryVersion, $wgJQueryMinified;
2643
2644                 $supportedModules = array( /** TODO: add things here */ );
2645                 $unsupported = array_diff( $modules, $supportedModules );
2646
2647                 $min = $wgJQueryMinified ? '.min' : '';
2648                 $url = "$wgStylePath/common/jquery-$wgJQueryVersion$min.js?$wgStyleVersion";
2649                 if ( !$this->mJQueryDone ) {
2650                         $this->mJQueryDone = true;
2651                         $this->mScripts = Html::linkedScript( $url ) . "\n" . $this->mScripts;
2652                 }
2653                 return $unsupported;
2654         }
2655
2656 }