includes/OutputPage.php

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