includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mLanguageLinks = array();
  16
  17         var $mScriptLoaderClassList = array();
  18
  19         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  20         var $mInlineMsg = array();
  21
  22         var $mTemplateIds = array();
  23
  24         var $mAllowUserJs;
  25         var $mSuppressQuickbar = false;
  26         var $mOnloadHandler = '';
  27         var $mDoNothing = false;
  28         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  29         var $mIsArticleRelated = true;
  30         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  31
  32         var $mFeedLinks = array();
  33
  34         var $mEnableClientCache = true;
  35         var $mArticleBodyOnly = false;
  36
  37         var $mNewSectionLink = false;
  38         var $mHideNewSectionLink = false;
  39         var $mNoGallery = false;
  40         var $mPageTitleActionText = '';
  41         var $mParseWarnings = array();
  42         var $mSquidMaxage = 0;
  43         var $mRevisionId = null;
  44         var $mScriptLoader = null;
  45         protected $mTitle = null;
  46
  47         /**
  48          * An array of stylesheet filenames (relative from skins path), with options
  49          * for CSS media, IE conditions, and RTL/LTR direction.
  50          * For internal use; add settings in the skin via $this->addStyle()
  51          */
  52         var $styles = array();
  53
  54         private $mIndexPolicy = 'index';
  55         private $mFollowPolicy = 'follow';
  56
  57         /**
  58          * Constructor
  59          * Initialise private variables
  60          */
  61         function __construct() {
  62                 global $wgAllowUserJs;
  63                 $this->mAllowUserJs = $wgAllowUserJs;
  64         }
  65
  66         public function redirect( $url, $responsecode = '302' ) {
  67                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  68                 $this->mRedirect = str_replace( "\n", '', $url );
  69                 $this->mRedirectCode = $responsecode;
  70         }
  71
  72         public function getRedirect() {
  73                 return $this->mRedirect;
  74         }
  75
  76         /**
  77          * Set the HTTP status code to send with the output.
  78          *
  79          * @param int $statusCode
  80          * @return nothing
  81          */
  82         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  83
  84         /**
  85          * Add a new <meta> tag
  86          * To add an http-equiv meta tag, precede the name with "http:"
  87          *
  88          * @param $name tag name
  89          * @param $val tag value
  90          */
  91         function addMeta( $name, $val ) {
  92                 array_push( $this->mMetatags, array( $name, $val ) );
  93         }
  94
  95         function addKeyword( $text ) {
  96                 if( is_array( $text )) {
  97                         $this->mKeywords = array_merge( $this->mKeywords, $text );
  98                 } else {
  99                         array_push( $this->mKeywords, $text );
 100                 }
 101         }
 102         function addScript( $script ) {
 103                 $this->mScripts .= $script . "\n";
 104         }
 105
 106         /**
 107          * Register and add a stylesheet from an extension directory.
 108          * @param $url String path to sheet.  Provide either a full url (beginning
 109          *             with 'http', etc) or a relative path from the document root
 110          *             (beginning with '/').  Otherwise it behaves identically to
 111          *             addStyle() and draws from the /skins folder.
 112          */
 113         public function addExtensionStyle( $url ) {
 114                 array_push( $this->mExtStyles, $url );
 115         }
 116
 117         /**
 118          * Add a JavaScript file out of skins/common, or a given relative path.
 119          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 120          */
 121         function addScriptFile( $file ) {
 122                 global $wgStylePath, $wgScript, $wgUser;
 123                 global $wgEnableScriptLoader, $wgScriptPath;
 124
 125                 if( substr( $file, 0, 1 ) == '/' ) {
 126                         $path = $file;
 127                 } else {
 128                         $path = "{$wgStylePath}/common/{$file}";
 129                 }
 130
 131                 // If the class can be determined, use the addScriptClass method
 132                 $js_class = $this->getJsClassFromPath( $path );
 133                 if( $js_class ) {
 134                         $this->addScriptClass( $js_class );
 135                         return true;
 136                 }
 137
 138                 //do checks for wiki-titles
 139                 if( strpos( $path, $wgScript ) !== false ) {
 140                         $reqPath = str_replace( $wgScript . '?', '', $path );
 141                         $reqArgs = explode( '&', $reqPath );
 142                         $reqSet = array();
 143
 144                         foreach( $reqArgs as $arg ) {
 145                                 list( $key, $var ) = explode( '=', $arg );
 146                                 $reqSet[$key] = $var;
 147                         }
 148
 149                         if( isset( $reqSet['title'] ) && $reqSet != '' ) {
 150                                 $jsTitleClass = 'WT:' . $reqSet['title'];
 151                                 if( $wgEnableScriptLoader ) {
 152                                         // Extract any extra parameters (for now just skin)
 153                                         $ext_param = ( isset( $reqSet['useskin'] ) && $reqSet['useskin'] != '' )
 154                                                 ? '|useskin=' . ucfirst( $reqSet['useskin'] ) : '';
 155                                         $this->mScriptLoaderClassList[] = $jsTitleClass . $ext_param ;
 156                                         return true;
 157                                 }else{
 158                                         $this->addScript( Html::linkedScript(
 159                                                                 wfAppendQuery( $path, $this->getURIDparam( $jsTitleClass ) )
 160                                                         )
 161                                                 );
 162                                         return true;
 163                                 }
 164                         }
 165                 }
 166                 // If the script loader could not be used, just add the script to the header
 167                 $this->addScript( Html::linkedScript( wfAppendQuery( $path, $this->getURIDparam() ) ) );
 168         }
 169
 170         /**
 171          * Add the core scripts that are included on every page, for later output into the header
 172          *
 173          * this includes the conditional sitejs
 174          */
 175         function addCoreScripts2Top(){
 176                 global $wgEnableScriptLoader, $wgJSAutoloadLocalClasses, $wgScriptPath, $wgEnableJS2system;
 177                 global $wgUser, $wgJsMimeType;
 178                 // @todo We should deprecate wikibits in favor of some mv_embed pieces and jQuery
 179
 180                 if( $wgEnableJS2system ){
 181                         $core_classes = array( 'window.jQuery', 'mv_embed', 'wikibits' );
 182                 } else {
 183                         $core_classes = array( 'wikibits' );
 184                 }
 185
 186                 //make sure scripts are on top:
 187                 $postScripts = $this->mScripts;
 188                 $this->mScripts = '';
 189
 190                 if( $wgEnableScriptLoader ){
 191                         //directly add script_loader call for addCoreScripts2Top
 192                         $this->mScripts = $this->getScriptLoaderJs( $core_classes );
 193                 } else {
 194                         $so = '';
 195                         foreach( $core_classes as $js_class ){
 196                                 $this->addScriptClass( $js_class );
 197                         }
 198                 }
 199                 //now re-append any scripts that got added prior to the addCoreScripts2Top call
 200                 $this->mScripts = $this->mScripts . $postScripts;
 201         }
 202
 203         /**
 204          * @param string $js_class Name of the JavaScript class
 205          * @return boolean False if the class wasn't found, true on success
 206          */
 207         function addScriptClass( $js_class ){
 208                 global $wgDebugJavaScript, $wgJSAutoloadLocalClasses, $wgJSAutoloadClasses,
 209                                 $wgEnableScriptLoader, $wgStyleVersion, $wgScriptPath, $wgStylePath, $wgEnableJS2system;
 210
 211                 $path = jsScriptLoader::getJsPathFromClass( $js_class );
 212                 if( $path !== false ){
 213                         if( $wgEnableScriptLoader ) {
 214                                 // Register it with the script loader
 215                                 if( !in_array( $js_class, $this->mScriptLoaderClassList ) ) {
 216                                         $this->mScriptLoaderClassList[] = $js_class;
 217                                 }
 218                         } else {
 219                                 // Source the script directly
 220                                 $prefix = "skins/common/";
 221                                 if( substr( $path, 0, 1 ) == '/' ) {
 222                                         // straight path
 223                                 } elseif( substr( $path, 0, strlen( $prefix ) ) == $prefix ) {
 224                                         // Respect $wgStypePath
 225                                         $path = "{$wgStylePath}/common/" . substr( $path, strlen( $prefix ) );
 226                                 } else {
 227                                         $path = $wgScriptPath . '/' . $path;
 228                                 }
 229                                 $this->addScript( Html::linkedScript( $path . "?" . $this->getURIDparam( $js_class ) ) );
 230
 231                                 // Merge in language text (if js2 is on and we have loadGM function &  scriptLoader is "off")
 232                                 if( $wgEnableJS2system ){
 233                                         if( !$this->mScriptLoader )
 234                                                 $this->mScriptLoader = new jsScriptLoader();
 235
 236                                         $inlineMsg = $this->mScriptLoader->getInlineLoadGMFromClass( $js_class );
 237                                         if( $inlineMsg != '' )
 238                                                 $this->addScript( Html::inlineScript( $inlineMsg ));
 239                                 }
 240                         }
 241                         return true;
 242                 }
 243                 //print "could not find: $js_class\n";
 244                 wfDebug( __METHOD__ . ' could not find js_class: ' . $js_class );
 245                 return false; // could not find the class
 246         }
 247
 248         /**
 249          * Get the <script> tag which will invoke the script loader
 250          * @param $classAry A class array which, if given, overrides $this->mScriptLoaderClassList
 251          */
 252         function getScriptLoaderJs( $classAry = array() ) {
 253                 global $wgRequest, $wgDebugJavaScript;
 254                 // If no class array was provided, use mScriptLoaderClassList
 255                 if( !count( $classAry ) ) {
 256                         $classAry = $this->mScriptLoaderClassList;
 257                 }
 258                 $class_list = implode( ',', $classAry );
 259
 260                 $debug_param = ( $wgDebugJavaScript ||
 261                                                  $wgRequest->getVal( 'debug' ) == 'true' ||
 262                                                  $wgRequest->getVal( 'debug' ) == '1' )
 263                                          ? '&debug=true' : '';
 264
 265                 return Html::linkedScript( wfScript( 'mwScriptLoader' ) .
 266                         "?class={$class_list}{$debug_param}&" . $this->getURIDparam( $classAry) ) . "\n";
 267         }
 268
 269         /**
 270          * Get the unique request ID parameter for the script-loader request
 271          */
 272         function getURIDparam( $classAry = array() ) {
 273                 global $wgDebugJavaScript, $wgStyleVersion, $IP, $wgScriptModifiedFileCheck;
 274                 global $wgLang,  $wgScriptModifiedMsgCheck;
 275
 276                 //Always the language key param to keep urls distinct per language
 277                 $uriParam = 'uselang=' . $wgLang->getCode();
 278
 279                 if( $wgDebugJavaScript ) {
 280                         return $uriParam . '&urid=' . time();
 281                 } else {
 282                         //support single class_name attr
 283                         if( gettype( $classAry) == 'string'  ){
 284                                 $classAry = array( $classAry );
 285                         }
 286                         $ftime =  $frev = 0;
 287                         foreach( $classAry as $class ) {
 288                                 // Add the latest revision ID if the class set includes a WT (wiki title)
 289                                 if( substr($class, 0, 3) == 'WT:'){
 290                                         $title_str = substr($class, 3);
 291                                         $t = Title::newFromText( $title_str );
 292                                         if( $t && $t->exists() ) {
 293                                                 if( $t->getLatestRevID() > $frev  )
 294                                                         $frev = $t->getLatestRevID();
 295                                         }
 296                                 }else{
 297                                         //check for file modified time:
 298                                         if( $wgScriptModifiedFileCheck ) {
 299                                                 $js_path =  jsScriptLoader::getJsPathFromClass( $class );
 300                                                 if( $js_path ) {
 301                                                         $cur_ftime = filemtime ( $IP ."/". $js_path );
 302                                                         if( $cur_ftime > $ftime )
 303                                                                 $ftime = $cur_ftime;
 304                                                 }
 305                                         }
 306                                 }
 307                         }
 308                         //build the actual unique request id:
 309                         $uriParam = "&urid={$wgStyleVersion}";
 310
 311                         // Add the file modification time if set
 312                         if( $ftime != 0 )
 313                                 $uriParam .= "_" . $ftime;
 314
 315                         //add the wiki rev id if set
 316                         if( $frev != 0 )
 317                                 $uriParam.= "_" . $frev;
 318
 319                         //add the latest msg rev id if $wgScriptModifiedMsgCheck is enabled:
 320                         if( $wgScriptModifiedMsgCheck ){
 321                                 $dbr = wfGetDB( DB_SLAVE );
 322                                 // Grab the latest mediaWiki msg rev id:
 323                                 $res = $dbr->select( 'recentchanges',
 324                                                 'rc_id',
 325                                                 array( 'rc_namespace'=> NS_MEDIAWIKI ),
 326                                                 __METHOD__,
 327                                                 array(  'ORDER BY' => 'rc_timestamp DESC', 'LIMIT' => 1 ,
 328                                                                 'USE INDEX' => array('recentchanges' => 'rc_timestamp' )
 329                                                 )
 330                                         );
 331                                 if( $dbr->numRows($res) != 0){
 332                                         $rc = $dbr->fetchObject( $res );
 333                                         if( $rc->rc_id ){
 334                                                 $uriParam.= '_' . $rc->rc_id;
 335                                         }
 336                                 }
 337                                 //@@todo we could otherwise use the the SVN version if not already covered by $wgStyleVersion above
 338                         }
 339                         return $uriParam;
 340                 }
 341         }
 342         /**
 343          * Given a script path, get the JS class name, or false if no such path is registered.
 344          * @param $path string
 345          */
 346         function getJsClassFromPath( $path ) {
 347                 global $wgJSAutoloadClasses, $wgJSAutoloadLocalClasses, $wgScriptPath;
 348
 349                 $scriptLoaderPaths = array_merge( $wgJSAutoloadClasses,  $wgJSAutoloadLocalClasses );
 350                 foreach( $scriptLoaderPaths as $js_class => $js_path ) {
 351                         $js_path = "{$wgScriptPath}/{$js_path}";
 352                         if( $path == $js_path )
 353                                 return $js_class;
 354                 }
 355                 return false;
 356         }
 357
 358         /**
 359          * Add a self-contained script tag with the given contents
 360          * @param string $script JavaScript text, no <script> tags
 361          */
 362         function addInlineScript( $script ) {
 363                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 364         }
 365
 366         /**
 367          * Get all registered JS and CSS tags for the header.
 368          */
 369         function getScript() {
 370                 global $wgEnableScriptLoader;
 371                 if( $wgEnableScriptLoader ){
 372                         return $this->mScripts . "\n" . $this->getScriptLoaderJs() . $this->getHeadItems();
 373                 } else {
 374                         return $this->mScripts . $this->getHeadItems();
 375                 }
 376         }
 377
 378         function getHeadItems() {
 379                 $s = '';
 380                 foreach ( $this->mHeadItems as $item ) {
 381                         $s .= $item;
 382                 }
 383                 return $s;
 384         }
 385
 386         function addHeadItem( $name, $value ) {
 387                 $this->mHeadItems[$name] = $value;
 388         }
 389
 390         function hasHeadItem( $name ) {
 391                 return isset( $this->mHeadItems[$name] );
 392         }
 393
 394         function setETag($tag) { $this->mETag = $tag; }
 395         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 396         function getArticleBodyOnly() { return $this->mArticleBodyOnly; }
 397
 398         function addLink( $linkarr ) {
 399                 # $linkarr should be an associative array of attributes. We'll escape on output.
 400                 array_push( $this->mLinktags, $linkarr );
 401         }
 402
 403         # Get all links added by extensions
 404         function getExtStyle() {
 405                 return $this->mExtStyles;
 406         }
 407
 408         function addMetadataLink( $linkarr ) {
 409                 # note: buggy CC software only reads first "meta" link
 410                 static $haveMeta = false;
 411                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 412                 $this->addLink( $linkarr );
 413                 $haveMeta = true;
 414         }
 415
 416         /**
 417          * checkLastModified tells the client to use the client-cached page if
 418          * possible. If sucessful, the OutputPage is disabled so that
 419          * any future call to OutputPage->output() have no effect.
 420          *
 421          * Side effect: sets mLastModified for Last-Modified header
 422          *
 423          * @return bool True iff cache-ok headers was sent.
 424          */
 425         function checkLastModified( $timestamp ) {
 426                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 427
 428                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 429                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 430                         return false;
 431                 }
 432                 if( !$wgCachePages ) {
 433                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 434                         return false;
 435                 }
 436                 if( $wgUser->getOption( 'nocache' ) ) {
 437                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 438                         return false;
 439                 }
 440
 441                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 442                 $modifiedTimes = array(
 443                         'page' => $timestamp,
 444                         'user' => $wgUser->getTouched(),
 445                         'epoch' => $wgCacheEpoch
 446                 );
 447                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 448
 449                 $maxModified = max( $modifiedTimes );
 450                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 451
 452                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 453                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 454                         return false;
 455                 }
 456
 457                 # Make debug info
 458                 $info = '';
 459                 foreach ( $modifiedTimes as $name => $value ) {
 460                         if ( $info !== '' ) {
 461                                 $info .= ', ';
 462                         }
 463                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 464                 }
 465
 466                 # IE sends sizes after the date like this:
 467                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 468                 # this breaks strtotime().
 469                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 470
 471                 wfSuppressWarnings(); // E_STRICT system time bitching
 472                 $clientHeaderTime = strtotime( $clientHeader );
 473                 wfRestoreWarnings();
 474                 if ( !$clientHeaderTime ) {
 475                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 476                         return false;
 477                 }
 478                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 479
 480                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 481                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 482                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 483                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 484                 if( $clientHeaderTime < $maxModified ) {
 485                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 486                         return false;
 487                 }
 488
 489                 # Not modified
 490                 # Give a 304 response code and disable body output
 491                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 492                 ini_set('zlib.output_compression', 0);
 493                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 494                 $this->sendCacheControl();
 495                 $this->disable();
 496
 497                 // Don't output a compressed blob when using ob_gzhandler;
 498                 // it's technically against HTTP spec and seems to confuse
 499                 // Firefox when the response gets split over two packets.
 500                 wfClearOutputBuffers();
 501
 502                 return true;
 503         }
 504
 505         function setPageTitleActionText( $text ) {
 506                 $this->mPageTitleActionText = $text;
 507         }
 508
 509         function getPageTitleActionText () {
 510                 if ( isset( $this->mPageTitleActionText ) ) {
 511                         return $this->mPageTitleActionText;
 512                 }
 513         }
 514
 515         /**
 516          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 517          *
 518          * @param $policy string The literal string to output as the contents of
 519          *   the meta tag.  Will be parsed according to the spec and output in
 520          *   standardized form.
 521          * @return null
 522          */
 523         public function setRobotPolicy( $policy ) {
 524                 $policy = Article::formatRobotPolicy( $policy );
 525
 526                 if( isset( $policy['index'] ) ){
 527                         $this->setIndexPolicy( $policy['index'] );
 528                 }
 529                 if( isset( $policy['follow'] ) ){
 530                         $this->setFollowPolicy( $policy['follow'] );
 531                 }
 532         }
 533
 534         /**
 535          * Set the index policy for the page, but leave the follow policy un-
 536          * touched.
 537          *
 538          * @param $policy string Either 'index' or 'noindex'.
 539          * @return null
 540          */
 541         public function setIndexPolicy( $policy ) {
 542                 $policy = trim( $policy );
 543                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 544                         $this->mIndexPolicy = $policy;
 545                 }
 546         }
 547
 548         /**
 549          * Set the follow policy for the page, but leave the index policy un-
 550          * touched.
 551          *
 552          * @param $policy string Either 'follow' or 'nofollow'.
 553          * @return null
 554          */
 555         public function setFollowPolicy( $policy ) {
 556                 $policy = trim( $policy );
 557                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 558                         $this->mFollowPolicy = $policy;
 559                 }
 560         }
 561
 562         /**
 563          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 564          */
 565         public function setHTMLTitle( $name ) {
 566                 $this->mHTMLtitle = $name;
 567         }
 568
 569         /**
 570          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 571          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 572          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 573          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 574          */
 575         public function setPageTitle( $name ) {
 576                 global $wgContLang;
 577                 $name = $wgContLang->convert( $name, true );
 578                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 579                 # but leave "<i>foobar</i>" alone
 580                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 581                 $this->mPagetitle = $nameWithTags;
 582
 583                 $taction =  $this->getPageTitleActionText();
 584                 if( !empty( $taction ) ) {
 585                         $name .= ' - '.$taction;
 586                 }
 587
 588                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 589                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 590         }
 591
 592         public function setTitle( $t ) {
 593                 $this->mTitle = $t;
 594         }
 595
 596         public function getTitle() {
 597                 if ( $this->mTitle instanceof Title ) {
 598                         return $this->mTitle;
 599                 }
 600                 else {
 601                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 602                         global $wgTitle;
 603                         return $wgTitle;
 604                 }
 605         }
 606
 607         public function getHTMLTitle() { return $this->mHTMLtitle; }
 608         public function getPageTitle() { return $this->mPagetitle; }
 609         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 610         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 611         public function getSubtitle() { return $this->mSubtitle; }
 612         public function isArticle() { return $this->mIsarticle; }
 613         public function setPrintable() { $this->mPrintable = true; }
 614         public function isPrintable() { return $this->mPrintable; }
 615         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 616         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 617         public function getOnloadHandler() { return $this->mOnloadHandler; }
 618         public function disable() { $this->mDoNothing = true; }
 619         public function isDisabled() { return $this->mDoNothing; }
 620
 621         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 622
 623         public function setFeedAppendQuery( $val ) {
 624                 global $wgFeedClasses;
 625
 626                 $this->mFeedLinks = array();
 627
 628                 foreach( $wgFeedClasses as $type => $class ) {
 629                         $query = "feed=$type&".$val;
 630                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 631                 }
 632         }
 633
 634         public function addFeedLink( $format, $href ) {
 635                 $this->mFeedLinks[$format] = $href;
 636         }
 637
 638         public function isSyndicated() { return count($this->mFeedLinks); }
 639
 640         public function setArticleRelated( $v ) {
 641                 $this->mIsArticleRelated = $v;
 642                 if ( !$v ) {
 643                         $this->mIsarticle = false;
 644                 }
 645         }
 646         public function setArticleFlag( $v ) {
 647                 $this->mIsarticle = $v;
 648                 if ( $v ) {
 649                         $this->mIsArticleRelated = $v;
 650                 }
 651         }
 652
 653         public function isArticleRelated() { return $this->mIsArticleRelated; }
 654
 655         public function getLanguageLinks() { return $this->mLanguageLinks; }
 656         public function addLanguageLinks($newLinkArray) {
 657                 $this->mLanguageLinks += $newLinkArray;
 658         }
 659         public function setLanguageLinks($newLinkArray) {
 660                 $this->mLanguageLinks = $newLinkArray;
 661         }
 662
 663         public function getCategoryLinks() {
 664                 return $this->mCategoryLinks;
 665         }
 666
 667         /**
 668          * Add an array of categories, with names in the keys
 669          */
 670         public function addCategoryLinks( $categories ) {
 671                 global $wgUser, $wgContLang;
 672
 673                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 674                         return;
 675                 }
 676
 677                 # Add the links to a LinkBatch
 678                 $arr = array( NS_CATEGORY => $categories );
 679                 $lb = new LinkBatch;
 680                 $lb->setArray( $arr );
 681
 682                 # Fetch existence plus the hiddencat property
 683                 $dbr = wfGetDB( DB_SLAVE );
 684                 $pageTable = $dbr->tableName( 'page' );
 685                 $where = $lb->constructSet( 'page', $dbr );
 686                 $propsTable = $dbr->tableName( 'page_props' );
 687                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 688                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 689                 $res = $dbr->query( $sql, __METHOD__ );
 690
 691                 # Add the results to the link cache
 692                 $lb->addResultToCache( LinkCache::singleton(), $res );
 693
 694                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 695                 $categories = array_combine( array_keys( $categories ),
 696                         array_fill( 0, count( $categories ), 'normal' ) );
 697
 698                 # Mark hidden categories
 699                 foreach ( $res as $row ) {
 700                         if ( isset( $row->pp_value ) ) {
 701                                 $categories[$row->page_title] = 'hidden';
 702                         }
 703                 }
 704
 705                 # Add the remaining categories to the skin
 706                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 707                         $sk = $wgUser->getSkin();
 708                         foreach ( $categories as $category => $type ) {
 709                                 $origcategory = $category;
 710                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 711                                 $wgContLang->findVariantLink( $category, $title, true );
 712                                 if ( $category != $origcategory )
 713                                         if ( array_key_exists( $category, $categories ) )
 714                                                 continue;
 715                                 $text = $wgContLang->convertHtml( $title->getText() );
 716                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 717                         }
 718                 }
 719         }
 720
 721         public function setCategoryLinks($categories) {
 722                 $this->mCategoryLinks = array();
 723                 $this->addCategoryLinks($categories);
 724         }
 725
 726         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 727         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 728
 729         public function disallowUserJs() { $this->mAllowUserJs = false; }
 730         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 731
 732         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 733         public function addHTML( $text ) { $this->mBodytext .= $text; }
 734         public function clearHTML() { $this->mBodytext = ''; }
 735         public function getHTML() { return $this->mBodytext; }
 736         public function debug( $text ) { $this->mDebugtext .= $text; }
 737
 738         /* @deprecated */
 739         public function setParserOptions( $options ) {
 740                 wfDeprecated( __METHOD__ );
 741                 return $this->parserOptions( $options );
 742         }
 743
 744         public function parserOptions( $options = null ) {
 745                 if ( !$this->mParserOptions ) {
 746                         $this->mParserOptions = new ParserOptions;
 747                 }
 748                 return wfSetVar( $this->mParserOptions, $options );
 749         }
 750
 751         /**
 752          * Set the revision ID which will be seen by the wiki text parser
 753          * for things such as embedded {{REVISIONID}} variable use.
 754          * @param mixed $revid an integer, or NULL
 755          * @return mixed previous value
 756          */
 757         public function setRevisionId( $revid ) {
 758                 $val = is_null( $revid ) ? null : intval( $revid );
 759                 return wfSetVar( $this->mRevisionId, $val );
 760         }
 761
 762         public function getRevisionId() {
 763                 return $this->mRevisionId;
 764         }
 765
 766         /**
 767          * Convert wikitext to HTML and add it to the buffer
 768          * Default assumes that the current page title will
 769          * be used.
 770          *
 771          * @param string $text
 772          * @param bool   $linestart
 773          */
 774         public function addWikiText( $text, $linestart = true ) {
 775                 $title = $this->getTitle(); // Work arround E_STRICT
 776                 $this->addWikiTextTitle( $text, $title, $linestart );
 777         }
 778
 779         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 780                 $this->addWikiTextTitle($text, $title, $linestart);
 781         }
 782
 783         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 784                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 785         }
 786
 787         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 788                 global $wgParser;
 789
 790                 wfProfileIn( __METHOD__ );
 791
 792                 wfIncrStats( 'pcache_not_possible' );
 793
 794                 $popts = $this->parserOptions();
 795                 $oldTidy = $popts->setTidy( $tidy );
 796
 797                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 798                         $linestart, true, $this->mRevisionId );
 799
 800                 $popts->setTidy( $oldTidy );
 801
 802                 $this->addParserOutput( $parserOutput );
 803
 804                 wfProfileOut( __METHOD__ );
 805         }
 806
 807         /**
 808          * @todo document
 809          * @param ParserOutput object &$parserOutput
 810          */
 811         public function addParserOutputNoText( &$parserOutput ) {
 812                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 813
 814                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 815                 $this->addCategoryLinks( $parserOutput->getCategories() );
 816                 $this->mNewSectionLink = $parserOutput->getNewSection();
 817                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 818
 819                 $this->mParseWarnings = $parserOutput->getWarnings();
 820                 if ( $parserOutput->getCacheTime() == -1 ) {
 821                         $this->enableClientCache( false );
 822                 }
 823                 $this->mNoGallery = $parserOutput->getNoGallery();
 824                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 825                 // Versioning...
 826                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 827                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 828                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 829                         } else {
 830                                 $this->mTemplateIds[$ns] = $dbks;
 831                         }
 832                 }
 833                 // Page title
 834                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 835                         $this->setPageTitle( $dt );
 836                 else if ( ( $title = $parserOutput->getTitleText() ) != '' )
 837                         $this->setPageTitle( $title );
 838
 839                 // Hooks registered in the object
 840                 global $wgParserOutputHooks;
 841                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 842                         list( $hookName, $data ) = $hookInfo;
 843                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 844                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 845                         }
 846                 }
 847
 848                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 849         }
 850
 851         /**
 852          * @todo document
 853          * @param ParserOutput &$parserOutput
 854          */
 855         function addParserOutput( &$parserOutput ) {
 856                 $this->addParserOutputNoText( $parserOutput );
 857                 $text = $parserOutput->getText();
 858                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 859                 $this->addHTML( $text );
 860         }
 861
 862         /**
 863          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 864          * Saves the text into the parser cache if possible.
 865          *
 866          * @param string  $text
 867          * @param Article $article
 868          * @param bool    $cache
 869          * @deprecated Use Article::outputWikitext
 870          */
 871         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 872                 global $wgParser;
 873
 874                 wfDeprecated( __METHOD__ );
 875
 876                 $popts = $this->parserOptions();
 877                 $popts->setTidy(true);
 878                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 879                         $popts, true, true, $this->mRevisionId );
 880                 $popts->setTidy(false);
 881                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 882                         $parserCache = ParserCache::singleton();
 883                         $parserCache->save( $parserOutput, $article, $popts);
 884                 }
 885
 886                 $this->addParserOutput( $parserOutput );
 887         }
 888
 889         /**
 890          * @deprecated use addWikiTextTidy()
 891          */
 892         public function addSecondaryWikiText( $text, $linestart = true ) {
 893                 wfDeprecated( __METHOD__ );
 894                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 895         }
 896
 897         /**
 898          * Add wikitext with tidy enabled
 899          */
 900         public function addWikiTextTidy(  $text, $linestart = true ) {
 901                 $title = $this->getTitle();
 902                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 903         }
 904
 905
 906         /**
 907          * Add the output of a QuickTemplate to the output buffer
 908          *
 909          * @param QuickTemplate $template
 910          */
 911         public function addTemplate( &$template ) {
 912                 ob_start();
 913                 $template->execute();
 914                 $this->addHTML( ob_get_contents() );
 915                 ob_end_clean();
 916         }
 917
 918         /**
 919          * Parse wikitext and return the HTML.
 920          *
 921          * @param string $text
 922          * @param bool   $linestart Is this the start of a line?
 923          * @param bool   $interface ??
 924          */
 925         public function parse( $text, $linestart = true, $interface = false ) {
 926                 global $wgParser;
 927                 if( is_null( $this->getTitle() ) ) {
 928                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 929                 }
 930                 $popts = $this->parserOptions();
 931                 if ( $interface) { $popts->setInterfaceMessage(true); }
 932                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 933                         $linestart, true, $this->mRevisionId );
 934                 if ( $interface) { $popts->setInterfaceMessage(false); }
 935                 return $parserOutput->getText();
 936         }
 937
 938         /** Parse wikitext, strip paragraphs, and return the HTML. */
 939         public function parseInline( $text, $linestart = true, $interface = false ) {
 940                 $parsed = $this->parse( $text, $linestart, $interface );
 941
 942                 $m = array();
 943                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 944                         $parsed = $m[1];
 945                 }
 946
 947                 return $parsed;
 948         }
 949
 950         /**
 951          * @param Article $article
 952          * @param User    $user
 953          *
 954          * @deprecated
 955          *
 956          * @return bool True if successful, else false.
 957          */
 958         public function tryParserCache( &$article ) {
 959                 wfDeprecated( __METHOD__ );
 960                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 961
 962                 if ($parserOutput !== false) {
 963                         $this->addParserOutput( $parserOutput );
 964                         return true;
 965                 } else {
 966                         return false;
 967                 }
 968         }
 969
 970         /**
 971          * @param int $maxage Maximum cache time on the Squid, in seconds.
 972          */
 973         public function setSquidMaxage( $maxage ) {
 974                 $this->mSquidMaxage = $maxage;
 975         }
 976
 977         /**
 978          * Use enableClientCache(false) to force it to send nocache headers
 979          * @param $state ??
 980          */
 981         public function enableClientCache( $state ) {
 982                 return wfSetVar( $this->mEnableClientCache, $state );
 983         }
 984
 985         function getCacheVaryCookies() {
 986                 global $wgCookiePrefix, $wgCacheVaryCookies;
 987                 static $cookies;
 988                 if ( $cookies === null ) {
 989                         $cookies = array_merge(
 990                                 array(
 991                                         "{$wgCookiePrefix}Token",
 992                                         "{$wgCookiePrefix}LoggedOut",
 993                                         session_name()
 994                                 ),
 995                                 $wgCacheVaryCookies
 996                         );
 997                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 998                 }
 999                 return $cookies;
1000         }
1001
1002         function uncacheableBecauseRequestVars() {
1003                 global $wgRequest;
1004                 return  $wgRequest->getText('useskin', false) === false
1005                         && $wgRequest->getText('uselang', false) === false;
1006         }
1007
1008         /**
1009          * Check if the request has a cache-varying cookie header
1010          * If it does, it's very important that we don't allow public caching
1011          */
1012         function haveCacheVaryCookies() {
1013                 global $wgRequest;
1014                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
1015                 if ( $cookieHeader === false ) {
1016                         return false;
1017                 }
1018                 $cvCookies = $this->getCacheVaryCookies();
1019                 foreach ( $cvCookies as $cookieName ) {
1020                         # Check for a simple string match, like the way squid does it
1021                         if ( strpos( $cookieHeader, $cookieName ) ) {
1022                                 wfDebug( __METHOD__.": found $cookieName\n" );
1023                                 return true;
1024                         }
1025                 }
1026                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
1027                 return false;
1028         }
1029
1030         /** Get a complete X-Vary-Options header */
1031         public function getXVO() {
1032                 $cvCookies = $this->getCacheVaryCookies();
1033                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
1034                 $first = true;
1035                 foreach ( $cvCookies as $cookieName ) {
1036                         if ( $first ) {
1037                                 $first = false;
1038                         } else {
1039                                 $xvo .= ';';
1040                         }
1041                         $xvo .= 'string-contains=' . $cookieName;
1042                 }
1043                 return $xvo;
1044         }
1045
1046         public function sendCacheControl() {
1047                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
1048
1049                 $response = $wgRequest->response();
1050                 if ($wgUseETag && $this->mETag)
1051                         $response->header("ETag: $this->mETag");
1052
1053                 # don't serve compressed data to clients who can't handle it
1054                 # maintain different caches for logged-in users and non-logged in ones
1055                 $response->header( 'Vary: Accept-Encoding, Cookie' );
1056
1057                 if ( $wgUseXVO ) {
1058                         # Add an X-Vary-Options header for Squid with Wikimedia patches
1059                         $response->header( $this->getXVO() );
1060                 }
1061
1062                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
1063                         if( $wgUseSquid && session_id() == '' &&
1064                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
1065                         {
1066                                 if ( $wgUseESI ) {
1067                                         # We'll purge the proxy cache explicitly, but require end user agents
1068                                         # to revalidate against the proxy on each visit.
1069                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
1070                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
1071                                         # start with a shorter timeout for initial testing
1072                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
1073                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
1074                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
1075                                 } else {
1076                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
1077                                         # to revalidate against the proxy on each visit.
1078                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
1079                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
1080                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
1081                                         # start with a shorter timeout for initial testing
1082                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
1083                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1084                                 }
1085                         } else {
1086                                 # We do want clients to cache if they can, but they *must* check for updates
1087                                 # on revisiting the page.
1088                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1089                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1090                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1091                         }
1092                         if($this->mLastModified) {
1093                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1094                         }
1095                 } else {
1096                         wfDebug( __METHOD__ . ": no caching **\n", false );
1097
1098                         # In general, the absence of a last modified header should be enough to prevent
1099                         # the client from using its cache. We send a few other things just to make sure.
1100                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1101                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1102                         $response->header( 'Pragma: no-cache' );
1103                 }
1104         }
1105
1106         /**
1107          * Finally, all the text has been munged and accumulated into
1108          * the object, let's actually output it:
1109          */
1110         public function output() {
1111                 global $wgUser, $wgOutputEncoding, $wgRequest;
1112                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1113                 global $wgUseAjax, $wgAjaxWatch;
1114                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1115                 global $wgArticle;
1116
1117                 if( $this->mDoNothing ){
1118                         return;
1119                 }
1120                 wfProfileIn( __METHOD__ );
1121                 if ( '' != $this->mRedirect ) {
1122                         # Standards require redirect URLs to be absolute
1123                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1124                         if( $this->mRedirectCode == '301') {
1125                                 if( !$wgDebugRedirects ) {
1126                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
1127                                 }
1128                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1129                         }
1130                         $this->sendCacheControl();
1131
1132                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
1133                         if( $wgDebugRedirects ) {
1134                                 $url = htmlspecialchars( $this->mRedirect );
1135                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1136                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1137                                 print "</body>\n</html>\n";
1138                         } else {
1139                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
1140                         }
1141                         wfProfileOut( __METHOD__ );
1142                         return;
1143                 }
1144                 elseif ( $this->mStatusCode )
1145                 {
1146                         $statusMessage = array(
1147                                 100 => 'Continue',
1148                                 101 => 'Switching Protocols',
1149                                 102 => 'Processing',
1150                                 200 => 'OK',
1151                                 201 => 'Created',
1152                                 202 => 'Accepted',
1153                                 203 => 'Non-Authoritative Information',
1154                                 204 => 'No Content',
1155                                 205 => 'Reset Content',
1156                                 206 => 'Partial Content',
1157                                 207 => 'Multi-Status',
1158                                 300 => 'Multiple Choices',
1159                                 301 => 'Moved Permanently',
1160                                 302 => 'Found',
1161                                 303 => 'See Other',
1162                                 304 => 'Not Modified',
1163                                 305 => 'Use Proxy',
1164                                 307 => 'Temporary Redirect',
1165                                 400 => 'Bad Request',
1166                                 401 => 'Unauthorized',
1167                                 402 => 'Payment Required',
1168                                 403 => 'Forbidden',
1169                                 404 => 'Not Found',
1170                                 405 => 'Method Not Allowed',
1171                                 406 => 'Not Acceptable',
1172                                 407 => 'Proxy Authentication Required',
1173                                 408 => 'Request Timeout',
1174                                 409 => 'Conflict',
1175                                 410 => 'Gone',
1176                                 411 => 'Length Required',
1177                                 412 => 'Precondition Failed',
1178                                 413 => 'Request Entity Too Large',
1179                                 414 => 'Request-URI Too Large',
1180                                 415 => 'Unsupported Media Type',
1181                                 416 => 'Request Range Not Satisfiable',
1182                                 417 => 'Expectation Failed',
1183                                 422 => 'Unprocessable Entity',
1184                                 423 => 'Locked',
1185                                 424 => 'Failed Dependency',
1186                                 500 => 'Internal Server Error',
1187                                 501 => 'Not Implemented',
1188                                 502 => 'Bad Gateway',
1189                                 503 => 'Service Unavailable',
1190                                 504 => 'Gateway Timeout',
1191                                 505 => 'HTTP Version Not Supported',
1192                                 507 => 'Insufficient Storage'
1193                         );
1194
1195                         if ( $statusMessage[$this->mStatusCode] )
1196                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
1197                 }
1198
1199                 $sk = $wgUser->getSkin();
1200
1201                 // Add our core scripts to output
1202                 $this->addCoreScripts2Top();
1203
1204                 if ( $wgUseAjax ) {
1205                         $this->addScriptFile( 'ajax.js' );
1206
1207                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1208
1209                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1210                                 $this->addScriptFile( 'ajaxwatch.js' );
1211                         }
1212
1213                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1214                                 $this->addScriptFile( 'mwsuggest.js' );
1215                         }
1216                 }
1217
1218                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1219                         $this->addScriptFile( 'rightclickedit.js' );
1220                 }
1221
1222                 global $wgUseAJAXCategories, $wgEnableJS2system;
1223                 if ($wgUseAJAXCategories && $wgEnableJS2system) {
1224                         global $wgAJAXCategoriesNamespaces;
1225
1226                         $title = $this->getTitle();
1227
1228                         if( empty( $wgAJAXCategoriesNamespaces ) || in_array( $title->getNamespace(), $wgAJAXCategoriesNamespaces ) ) {
1229                                 $this->addScriptClass( 'ajaxCategories' );
1230                         }
1231                 }
1232
1233                 if( $wgUniversalEditButton ) {
1234                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1235                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1236                                 // Original UniversalEditButton
1237                                 $msg = wfMsg('edit');
1238                                 $this->addLink( array(
1239                                         'rel' => 'alternate',
1240                                         'type' => 'application/x-wiki',
1241                                         'title' => $msg,
1242                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1243                                 ) );
1244                                 // Alternate edit link
1245                                 $this->addLink( array(
1246                                         'rel' => 'edit',
1247                                         'title' => $msg,
1248                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1249                                 ) );
1250                         }
1251                 }
1252
1253                 # Buffer output; final headers may depend on later processing
1254                 ob_start();
1255
1256                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1257                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1258
1259                 if ($this->mArticleBodyOnly) {
1260                         $this->out($this->mBodytext);
1261                 } else {
1262                         // Hook that allows last minute changes to the output page, e.g.
1263                         // adding of CSS or Javascript by extensions.
1264                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1265
1266                         wfProfileIn( 'Output-skin' );
1267                         $sk->outputPage( $this );
1268                         wfProfileOut( 'Output-skin' );
1269                 }
1270
1271                 $this->sendCacheControl();
1272                 ob_end_flush();
1273                 wfProfileOut( __METHOD__ );
1274         }
1275
1276         /**
1277          * Actually output something with print(). Performs an iconv to the
1278          * output encoding, if needed.
1279          * @param string $ins The string to output
1280          */
1281         public function out( $ins ) {
1282                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1283                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1284                         $outs = $ins;
1285                 } else {
1286                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1287                         if ( false === $outs ) { $outs = $ins; }
1288                 }
1289                 print $outs;
1290         }
1291
1292         /**
1293          * @todo document
1294          */
1295         public static function setEncodings() {
1296                 global $wgInputEncoding, $wgOutputEncoding;
1297                 global $wgContLang;
1298
1299                 $wgInputEncoding = strtolower( $wgInputEncoding );
1300
1301                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1302                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1303                         return;
1304                 }
1305                 $wgOutputEncoding = $wgInputEncoding;
1306         }
1307
1308         /**
1309          * Deprecated, use wfReportTime() instead.
1310          * @return string
1311          * @deprecated
1312          */
1313         public function reportTime() {
1314                 wfDeprecated( __METHOD__ );
1315                 $time = wfReportTime();
1316                 return $time;
1317         }
1318
1319         /**
1320          * Produce a "user is blocked" page.
1321          *
1322          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1323          * @return nothing
1324          */
1325         function blockedPage( $return = true ) {
1326                 global $wgUser, $wgContLang, $wgLang;
1327
1328                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1329                 $this->setRobotPolicy( 'noindex,nofollow' );
1330                 $this->setArticleRelated( false );
1331
1332                 $name = User::whoIs( $wgUser->blockedBy() );
1333                 $reason = $wgUser->blockedFor();
1334                 if( $reason == '' ) {
1335                         $reason = wfMsg( 'blockednoreason' );
1336                 }
1337                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1338                 $ip = wfGetIP();
1339
1340                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1341
1342                 $blockid = $wgUser->mBlock->mId;
1343
1344                 $blockExpiry = $wgUser->mBlock->mExpiry;
1345                 if ( $blockExpiry == 'infinity' ) {
1346                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1347                         // Search for localization in 'ipboptions'
1348                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1349                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1350                                 if ( strpos( $option, ":" ) === false )
1351                                         continue;
1352                                 list( $show, $value ) = explode( ":", $option );
1353                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1354                                         $blockExpiry = $show;
1355                                         break;
1356                                 }
1357                         }
1358                 } else {
1359                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1360                 }
1361
1362                 if ( $wgUser->mBlock->mAuto ) {
1363                         $msg = 'autoblockedtext';
1364                 } else {
1365                         $msg = 'blockedtext';
1366                 }
1367
1368                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1369                  * This could be a username, an ip range, or a single ip. */
1370                 $intended = $wgUser->mBlock->mAddress;
1371
1372                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1373
1374                 # Don't auto-return to special pages
1375                 if( $return ) {
1376                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1377                         $this->returnToMain( null, $return );
1378                 }
1379         }
1380
1381         /**
1382          * Output a standard error page
1383          *
1384          * @param string $title Message key for page title
1385          * @param string $msg Message key for page text
1386          * @param array $params Message parameters
1387          */
1388         public function showErrorPage( $title, $msg, $params = array() ) {
1389                 if ( $this->getTitle() ) {
1390                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1391                 }
1392                 $this->setPageTitle( wfMsg( $title ) );
1393                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1394                 $this->setRobotPolicy( 'noindex,nofollow' );
1395                 $this->setArticleRelated( false );
1396                 $this->enableClientCache( false );
1397                 $this->mRedirect = '';
1398                 $this->mBodytext = '';
1399
1400                 array_unshift( $params, 'parse' );
1401                 array_unshift( $params, $msg );
1402                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1403
1404                 $this->returnToMain();
1405         }
1406
1407         /**
1408          * Output a standard permission error page
1409          *
1410          * @param array $errors Error message keys
1411          */
1412         public function showPermissionsErrorPage( $errors, $action = null )
1413         {
1414                 $this->mDebugtext .= 'Original title: ' .
1415                 $this->getTitle()->getPrefixedText() . "\n";
1416                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1417                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1418                 $this->setRobotPolicy( 'noindex,nofollow' );
1419                 $this->setArticleRelated( false );
1420                 $this->enableClientCache( false );
1421                 $this->mRedirect = '';
1422                 $this->mBodytext = '';
1423                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1424         }
1425
1426         /** @deprecated */
1427         public function errorpage( $title, $msg ) {
1428                 wfDeprecated( __METHOD__ );
1429                 throw new ErrorPageError( $title, $msg );
1430         }
1431
1432         /**
1433          * Display an error page indicating that a given version of MediaWiki is
1434          * required to use it
1435          *
1436          * @param mixed $version The version of MediaWiki needed to use the page
1437          */
1438         public function versionRequired( $version ) {
1439                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1440                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1441                 $this->setRobotPolicy( 'noindex,nofollow' );
1442                 $this->setArticleRelated( false );
1443                 $this->mBodytext = '';
1444
1445                 $this->addWikiMsg( 'versionrequiredtext', $version );
1446                 $this->returnToMain();
1447         }
1448
1449         /**
1450          * Display an error page noting that a given permission bit is required.
1451          *
1452          * @param string $permission key required
1453          */
1454         public function permissionRequired( $permission ) {
1455                 global $wgLang;
1456
1457                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1458                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1459                 $this->setRobotPolicy( 'noindex,nofollow' );
1460                 $this->setArticleRelated( false );
1461                 $this->mBodytext = '';
1462
1463                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1464                         User::getGroupsWithPermission( $permission ) );
1465                 if( $groups ) {
1466                         $this->addWikiMsg( 'badaccess-groups',
1467                                 $wgLang->commaList( $groups ),
1468                                 count( $groups) );
1469                 } else {
1470                         $this->addWikiMsg( 'badaccess-group0' );
1471                 }
1472                 $this->returnToMain();
1473         }
1474
1475         /**
1476          * Use permissionRequired.
1477          * @deprecated
1478          */
1479         public function sysopRequired() {
1480                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1481         }
1482
1483         /**
1484          * Use permissionRequired.
1485          * @deprecated
1486          */
1487         public function developerRequired() {
1488                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1489         }
1490
1491         /**
1492          * Produce the stock "please login to use the wiki" page
1493          */
1494         public function loginToUse() {
1495                 global $wgUser, $wgContLang;
1496
1497                 if( $wgUser->isLoggedIn() ) {
1498                         $this->permissionRequired( 'read' );
1499                         return;
1500                 }
1501
1502                 $skin = $wgUser->getSkin();
1503
1504                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1505                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1506                 $this->setRobotPolicy( 'noindex,nofollow' );
1507                 $this->setArticleFlag( false );
1508
1509                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1510                 $loginLink = $skin->link(
1511                         $loginTitle,
1512                         wfMsgHtml( 'loginreqlink' ),
1513                         array(),
1514                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1515                         array( 'known', 'noclasses' )
1516                 );
1517                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1518                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1519
1520                 # Don't return to the main page if the user can't read it
1521                 # otherwise we'll end up in a pointless loop
1522                 $mainPage = Title::newMainPage();
1523                 if( $mainPage->userCanRead() )
1524                         $this->returnToMain( null, $mainPage );
1525         }
1526
1527         /** @deprecated */
1528         public function databaseError( $fname, $sql, $error, $errno ) {
1529                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1530         }
1531
1532         /**
1533          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1534          * @return string The wikitext error-messages, formatted into a list.
1535          */
1536         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1537                 if ($action == null) {
1538                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1539                 } else {
1540                         global $wgLang;
1541                         $action_desc = wfMsgNoTrans( "action-$action" );
1542                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1543                 }
1544
1545                 if (count( $errors ) > 1) {
1546                         $text .= '<ul class="permissions-errors">' . "\n";
1547
1548                         foreach( $errors as $error )
1549                         {
1550                                 $text .= '<li>';
1551                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1552                                 $text .= "</li>\n";
1553                         }
1554                         $text .= '</ul>';
1555                 } else {
1556                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1557                 }
1558
1559                 return $text;
1560         }
1561
1562         /**
1563          * Display a page stating that the Wiki is in read-only mode,
1564          * and optionally show the source of the page that the user
1565          * was trying to edit.  Should only be called (for this
1566          * purpose) after wfReadOnly() has returned true.
1567          *
1568          * For historical reasons, this function is _also_ used to
1569          * show the error message when a user tries to edit a page
1570          * they are not allowed to edit.  (Unless it's because they're
1571          * blocked, then we show blockedPage() instead.)  In this
1572          * case, the second parameter should be set to true and a list
1573          * of reasons supplied as the third parameter.
1574          *
1575          * @todo Needs to be split into multiple functions.
1576          *
1577          * @param string $source    Source code to show (or null).
1578          * @param bool   $protected Is this a permissions error?
1579          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1580          */
1581         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1582                 global $wgUser;
1583                 $skin = $wgUser->getSkin();
1584
1585                 $this->setRobotPolicy( 'noindex,nofollow' );
1586                 $this->setArticleRelated( false );
1587
1588                 // If no reason is given, just supply a default "I can't let you do
1589                 // that, Dave" message.  Should only occur if called by legacy code.
1590                 if ( $protected && empty($reasons) ) {
1591                         $reasons[] = array( 'badaccess-group0' );
1592                 }
1593
1594                 if ( !empty($reasons) ) {
1595                         // Permissions error
1596                         if( $source ) {
1597                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1598                                 $this->setSubtitle(
1599                                         wfMsg(
1600                                                 'viewsourcefor',
1601                                                 $skin->link(
1602                                                         $this->getTitle(),
1603                                                         null,
1604                                                         array(),
1605                                                         array(),
1606                                                         array( 'known', 'noclasses' )
1607                                                 )
1608                                         )
1609                                 );
1610                         } else {
1611                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1612                         }
1613                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1614                 } else {
1615                         // Wiki is read only
1616                         $this->setPageTitle( wfMsg( 'readonly' ) );
1617                         $reason = wfReadOnlyReason();
1618                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1619                 }
1620
1621                 // Show source, if supplied
1622                 if( is_string( $source ) ) {
1623                         $this->addWikiMsg( 'viewsourcetext' );
1624
1625                         $params = array(
1626                                 'id'   => 'wpTextbox1',
1627                                 'name' => 'wpTextbox1',
1628                                 'cols' => $wgUser->getOption( 'cols' ),
1629                                 'rows' => $wgUser->getOption( 'rows' ),
1630                                 'readonly' => 'readonly'
1631                         );
1632                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1633
1634                         // Show templates used by this article
1635                         $skin = $wgUser->getSkin();
1636                         $article = new Article( $this->getTitle() );
1637                         $this->addHTML( "<div class='templatesUsed'>
1638 {$skin->formatTemplates( $article->getUsedTemplates() )}
1639 </div>
1640 " );
1641                 }
1642
1643                 # If the title doesn't exist, it's fairly pointless to print a return
1644                 # link to it.  After all, you just tried editing it and couldn't, so
1645                 # what's there to do there?
1646                 if( $this->getTitle()->exists() ) {
1647                         $this->returnToMain( null, $this->getTitle() );
1648                 }
1649         }
1650
1651         /** @deprecated */
1652         public function fatalError( $message ) {
1653                 wfDeprecated( __METHOD__ );
1654                 throw new FatalError( $message );
1655         }
1656
1657         /** @deprecated */
1658         public function unexpectedValueError( $name, $val ) {
1659                 wfDeprecated( __METHOD__ );
1660                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1661         }
1662
1663         /** @deprecated */
1664         public function fileCopyError( $old, $new ) {
1665                 wfDeprecated( __METHOD__ );
1666                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1667         }
1668
1669         /** @deprecated */
1670         public function fileRenameError( $old, $new ) {
1671                 wfDeprecated( __METHOD__ );
1672                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1673         }
1674
1675         /** @deprecated */
1676         public function fileDeleteError( $name ) {
1677                 wfDeprecated( __METHOD__ );
1678                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1679         }
1680
1681         /** @deprecated */
1682         public function fileNotFoundError( $name ) {
1683                 wfDeprecated( __METHOD__ );
1684                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1685         }
1686
1687         public function showFatalError( $message ) {
1688                 $this->setPageTitle( wfMsg( "internalerror" ) );
1689                 $this->setRobotPolicy( "noindex,nofollow" );
1690                 $this->setArticleRelated( false );
1691                 $this->enableClientCache( false );
1692                 $this->mRedirect = '';
1693                 $this->mBodytext = $message;
1694         }
1695
1696         public function showUnexpectedValueError( $name, $val ) {
1697                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1698         }
1699
1700         public function showFileCopyError( $old, $new ) {
1701                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1702         }
1703
1704         public function showFileRenameError( $old, $new ) {
1705                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1706         }
1707
1708         public function showFileDeleteError( $name ) {
1709                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1710         }
1711
1712         public function showFileNotFoundError( $name ) {
1713                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1714         }
1715
1716         /**
1717          * Add a "return to" link pointing to a specified title
1718          *
1719          * @param Title $title Title to link
1720          * @param string $query Query string
1721          */
1722         public function addReturnTo( $title, $query = array() ) {
1723                 global $wgUser;
1724                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1725                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1726                         $title, null, array(), $query ) );
1727                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1728         }
1729
1730         /**
1731          * Add a "return to" link pointing to a specified title,
1732          * or the title indicated in the request, or else the main page
1733          *
1734          * @param null $unused No longer used
1735          * @param Title $returnto Title to return to
1736          */
1737         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1738                 global $wgRequest;
1739
1740                 if ( $returnto == null ) {
1741                         $returnto = $wgRequest->getText( 'returnto' );
1742                 }
1743
1744                 if ( $returntoquery == null ) {
1745                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1746                 }
1747
1748                 if ( '' === $returnto ) {
1749                         $returnto = Title::newMainPage();
1750                 }
1751
1752                 if ( is_object( $returnto ) ) {
1753                         $titleObj = $returnto;
1754                 } else {
1755                         $titleObj = Title::newFromText( $returnto );
1756                 }
1757                 if ( !is_object( $titleObj ) ) {
1758                         $titleObj = Title::newMainPage();
1759                 }
1760
1761                 $this->addReturnTo( $titleObj, $returntoquery );
1762         }
1763
1764         /**
1765          * @return string The doctype, opening <html>, and head element.
1766          *
1767          * @param $sk Skin The given Skin
1768          */
1769         public function headElement( Skin $sk, $includeStyle = true ) {
1770                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1771                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1772                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgEnableScriptLoader, $wgHtml5;
1773
1774                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1775                 if ( $sk->commonPrintStylesheet() ) {
1776                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1777                 }
1778                 $sk->setupUserCss( $this );
1779
1780                 $ret = '';
1781
1782                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1783                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1784                 }
1785
1786                 if ( '' == $this->getHTMLTitle() ) {
1787                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1788                 }
1789
1790                 $dir = $wgContLang->getDir();
1791
1792                 if ( $wgHtml5 ) {
1793                         $ret .= "<!doctype html>\n";
1794                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1795                 } else {
1796                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1797                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1798                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1799                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1800                         }
1801                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1802                 }
1803
1804                 $ret .= "<head>\n";
1805                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1806                 $ret .= implode( "\n", array(
1807                         $this->getHeadLinks(),
1808                         $this->buildCssLinks(),
1809                         $this->getHeadScripts( $sk ),
1810                         $this->getHeadItems(),
1811                 ));
1812                 if( $sk->usercss ){
1813                         $ret .= Html::inlineStyle( $sk->usercss );
1814                 }
1815
1816                 if( $wgEnableScriptLoader )
1817                         $ret .= $this->getScriptLoaderJs();
1818
1819                 if ($wgUseTrackbacks && $this->isArticleRelated())
1820                         $ret .= $this->getTitle()->trackbackRDF();
1821
1822                 $ret .= "</head>\n";
1823                 return $ret;
1824         }
1825
1826         /*
1827          * gets the global variables and mScripts
1828          *
1829          * also adds userjs to the end if enabled:
1830         */
1831         function getHeadScripts( Skin $sk ) {
1832                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1833
1834                 $vars = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1835
1836                 //add site JS if enabled:
1837                 if( $wgUseSiteJs ) {
1838                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
1839                         $this->addScriptFile(  Skin::makeUrl( '-',
1840                                         "action=raw$jsCache&gen=js&useskin=" .
1841                                         urlencode( $sk->getSkinName() )
1842                                         )
1843                                 );
1844                 }
1845
1846                 //add user js if enabled:
1847                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
1848                         $action = $wgRequest->getVal( 'action', 'view' );
1849                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
1850                                 # XXX: additional security check/prompt?
1851                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
1852                         } else {
1853                                 $userpage = $wgUser->getUserPage();
1854                                 $userjs = Skin::makeUrl(
1855                                         $userpage->getPrefixedText() . '/' . $sk->getSkinName() . '.js',
1856                                         'action=raw&ctype=' . $wgJsMimeType );
1857                                 $this->addScriptFile( $userjs );
1858                         }
1859                 }
1860
1861                 return $vars . "\n" . $this->mScripts;
1862         }
1863
1864         protected function addDefaultMeta() {
1865                 global $wgVersion, $wgHtml5;
1866
1867                 static $called = false;
1868                 if ( $called ) {
1869                         # Don't run this twice
1870                         return;
1871                 }
1872                 $called = true;
1873
1874                 if ( !$wgHtml5 ) {
1875                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1876                 }
1877                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1878
1879                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1880                 if( $p !== 'index,follow' ) {
1881                         // http://www.robotstxt.org/wc/meta-user.html
1882                         // Only show if it's different from the default robots policy
1883                         $this->addMeta( 'robots', $p );
1884                 }
1885
1886                 if ( count( $this->mKeywords ) > 0 ) {
1887                         $strip = array(
1888                                 "/<.*?" . ">/" => '',
1889                                 "/_/" => ' '
1890                         );
1891                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1892                 }
1893         }
1894
1895         /**
1896          * @return string HTML tag links to be put in the header.
1897          */
1898         public function getHeadLinks() {
1899                 global $wgRequest, $wgFeed;
1900
1901                 // Ideally this should happen earlier, somewhere. :P
1902                 $this->addDefaultMeta();
1903
1904                 $tags = array();
1905
1906                 foreach ( $this->mMetatags as $tag ) {
1907                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1908                                 $a = 'http-equiv';
1909                                 $tag[0] = substr( $tag[0], 5 );
1910                         } else {
1911                                 $a = 'name';
1912                         }
1913                         $tags[] = Html::element( 'meta',
1914                                 array(
1915                                         $a => $tag[0],
1916                                         'content' => $tag[1] ) );
1917                 }
1918                 foreach ( $this->mLinktags as $tag ) {
1919                         $tags[] = Html::element( 'link', $tag );
1920                 }
1921
1922                 if( $wgFeed ) {
1923                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1924                                 # Use the page name for the title (accessed through $wgTitle since
1925                                 # there's no other way).  In principle, this could lead to issues
1926                                 # with having the same name for different feeds corresponding to
1927                                 # the same page, but we can't avoid that at this low a level.
1928
1929                                 $tags[] = $this->feedLink(
1930                                         $format,
1931                                         $link,
1932                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1933                         }
1934
1935                         # Recent changes feed should appear on every page (except recentchanges,
1936                         # that would be redundant). Put it after the per-page feed to avoid
1937                         # changing existing behavior. It's still available, probably via a
1938                         # menu in your browser. Some sites might have a different feed they'd
1939                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1940                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1941                         # If so, use it instead.
1942
1943                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses;
1944                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1945
1946                         if ( $wgOverrideSiteFeed ) {
1947                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1948                                         $tags[] = $this->feedLink (
1949                                                 $type,
1950                                                 htmlspecialchars( $feedUrl ),
1951                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1952                                 }
1953                         }
1954                         else if ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1955                                 foreach( $wgFeedClasses as $format => $class ) {
1956                                         $tags[] = $this->feedLink(
1957                                                 $format,
1958                                                 $rctitle->getLocalURL( "feed={$format}" ),
1959                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1960                                 }
1961                         }
1962                 }
1963
1964                 return implode( "\n", $tags );
1965         }
1966
1967         /**
1968          * Return URLs for each supported syndication format for this page.
1969          * @return array associating format keys with URLs
1970          */
1971         public function getSyndicationLinks() {
1972                 return $this->mFeedLinks;
1973         }
1974
1975         /**
1976          * Generate a <link rel/> for an RSS feed.
1977          */
1978         private function feedLink( $type, $url, $text ) {
1979                 return Html::element( 'link', array(
1980                         'rel' => 'alternate',
1981                         'type' => "application/$type+xml",
1982                         'title' => $text,
1983                         'href' => $url ) );
1984         }
1985
1986         /**
1987          * Add a local or specified stylesheet, with the given media options.
1988          * Meant primarily for internal use...
1989          *
1990          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1991          * @param $conditional -- for IE conditional comments, specifying an IE version
1992          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1993          */
1994         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1995                 $options = array();
1996                 // Even though we expect the media type to be lowercase, but here we
1997                 // force it to lowercase to be safe.
1998                 if( $media )
1999                         $options['media'] = $media;
2000                 if( $condition )
2001                         $options['condition'] = $condition;
2002                 if( $dir )
2003                         $options['dir'] = $dir;
2004                 $this->styles[$style] = $options;
2005         }
2006
2007         /**
2008          * Adds inline CSS styles
2009          * @param $style_css Mixed: inline CSS
2010          */
2011         public function addInlineStyle( $style_css ){
2012                 $this->mScripts .= Html::inlineStyle( $style_css );
2013         }
2014
2015         /**
2016          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
2017          * These will be applied to various media & IE conditionals.
2018          */
2019         public function buildCssLinks() {
2020                 $links = array();
2021                 foreach( $this->styles as $file => $options ) {
2022                         $link = $this->styleLink( $file, $options );
2023                         if( $link )
2024                                 $links[] = $link;
2025                 }
2026
2027                 return implode( "\n", $links );
2028         }
2029
2030         protected function styleLink( $style, $options ) {
2031                 global $wgRequest;
2032
2033                 if( isset( $options['dir'] ) ) {
2034                         global $wgContLang;
2035                         $siteDir = $wgContLang->getDir();
2036                         if( $siteDir != $options['dir'] )
2037                                 return '';
2038                 }
2039
2040                 if( isset( $options['media'] ) ) {
2041                         $media = $this->transformCssMedia( $options['media'] );
2042                         if( is_null( $media ) ) {
2043                                 return '';
2044                         }
2045                 } else {
2046                         $media = 'all';
2047                 }
2048
2049                 if( substr( $style, 0, 1 ) == '/' ||
2050                         substr( $style, 0, 5 ) == 'http:' ||
2051                         substr( $style, 0, 6 ) == 'https:' ) {
2052                         $url = $style;
2053                 } else {
2054                         global $wgStylePath, $wgStyleVersion;
2055                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
2056                 }
2057
2058                 $link = Html::linkedStyle( $url, $media );
2059
2060                 if( isset( $options['condition'] ) ) {
2061                         $condition = htmlspecialchars( $options['condition'] );
2062                         $link = "<!--[if $condition]>$link<![endif]-->";
2063                 }
2064                 return $link;
2065         }
2066
2067         function transformCssMedia( $media ) {
2068                 global $wgRequest, $wgHandheldForIPhone;
2069
2070                 // Switch in on-screen display for media testing
2071                 $switches = array(
2072                         'printable' => 'print',
2073                         'handheld' => 'handheld',
2074                 );
2075                 foreach( $switches as $switch => $targetMedia ) {
2076                         if( $wgRequest->getBool( $switch ) ) {
2077                                 if( $media == $targetMedia ) {
2078                                         $media = '';
2079                                 } elseif( $media == 'screen' ) {
2080                                         return null;
2081                                 }
2082                         }
2083                 }
2084
2085                 // Expand longer media queries as iPhone doesn't grok 'handheld'
2086                 if( $wgHandheldForIPhone ) {
2087                         $mediaAliases = array(
2088                                 'screen' => 'screen and (min-device-width: 481px)',
2089                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
2090                         );
2091
2092                         if( isset( $mediaAliases[$media] ) ) {
2093                                 $media = $mediaAliases[$media];
2094                         }
2095                 }
2096
2097                 return $media;
2098         }
2099
2100         /**
2101          * Turn off regular page output and return an error reponse
2102          * for when rate limiting has triggered.
2103          */
2104         public function rateLimited() {
2105
2106                 $this->setPageTitle(wfMsg('actionthrottled'));
2107                 $this->setRobotPolicy( 'noindex,follow' );
2108                 $this->setArticleRelated( false );
2109                 $this->enableClientCache( false );
2110                 $this->mRedirect = '';
2111                 $this->clearHTML();
2112                 $this->setStatusCode(503);
2113                 $this->addWikiMsg( 'actionthrottledtext' );
2114
2115                 $this->returnToMain( null, $this->getTitle() );
2116         }
2117
2118         /**
2119          * Show an "add new section" link?
2120          *
2121          * @return bool
2122          */
2123         public function showNewSectionLink() {
2124                 return $this->mNewSectionLink;
2125         }
2126
2127         /**
2128         * Forcibly hide the new section link?
2129         *
2130         * @return bool
2131         */
2132         public function forceHideNewSectionLink() {
2133                 return $this->mHideNewSectionLink;
2134         }
2135
2136         /**
2137          * Show a warning about slave lag
2138          *
2139          * If the lag is higher than $wgSlaveLagCritical seconds,
2140          * then the warning is a bit more obvious. If the lag is
2141          * lower than $wgSlaveLagWarning, then no warning is shown.
2142          *
2143          * @param int $lag Slave lag
2144          */
2145         public function showLagWarning( $lag ) {
2146                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
2147                 if( $lag >= $wgSlaveLagWarning ) {
2148                         $message = $lag < $wgSlaveLagCritical
2149                                 ? 'lag-warn-normal'
2150                                 : 'lag-warn-high';
2151                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2152                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2153                 }
2154         }
2155
2156         /**
2157          * Add a wikitext-formatted message to the output.
2158          * This is equivalent to:
2159          *
2160          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2161          */
2162         public function addWikiMsg( /*...*/ ) {
2163                 $args = func_get_args();
2164                 $name = array_shift( $args );
2165                 $this->addWikiMsgArray( $name, $args );
2166         }
2167
2168         /**
2169          * Add a wikitext-formatted message to the output.
2170          * Like addWikiMsg() except the parameters are taken as an array
2171          * instead of a variable argument list.
2172          *
2173          * $options is passed through to wfMsgExt(), see that function for details.
2174          */
2175         public function addWikiMsgArray( $name, $args, $options = array() ) {
2176                 $options[] = 'parse';
2177                 $text = wfMsgExt( $name, $options, $args );
2178                 $this->addHTML( $text );
2179         }
2180
2181         /**
2182          * This function takes a number of message/argument specifications, wraps them in
2183          * some overall structure, and then parses the result and adds it to the output.
2184          *
2185          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2186          * on. The subsequent arguments may either be strings, in which case they are the
2187          * message names, or arrays, in which case the first element is the message name,
2188          * and subsequent elements are the parameters to that message.
2189          *
2190          * The special named parameter 'options' in a message specification array is passed
2191          * through to the $options parameter of wfMsgExt().
2192          *
2193          * Don't use this for messages that are not in users interface language.
2194          *
2195          * For example:
2196          *
2197          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
2198          *
2199          * Is equivalent to:
2200          *
2201          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
2202          */
2203         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2204                 $msgSpecs = func_get_args();
2205                 array_shift( $msgSpecs );
2206                 $msgSpecs = array_values( $msgSpecs );
2207                 $s = $wrap;
2208                 foreach ( $msgSpecs as $n => $spec ) {
2209                         $options = array();
2210                         if ( is_array( $spec ) ) {
2211                                 $args = $spec;
2212                                 $name = array_shift( $args );
2213                                 if ( isset( $args['options'] ) ) {
2214                                         $options = $args['options'];
2215                                         unset( $args['options'] );
2216                                 }
2217                         }  else {
2218                                 $args = array();
2219                                 $name = $spec;
2220                         }
2221                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2222                 }
2223                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2224         }
2225 }