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