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