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