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