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 .= "\t\t" . $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( $forceClassAry = false ){
 231                 global $wgRequest, $wgDebugJavaScript;
 232
 233                 if( !$forceClassAry ){
 234                         $class_list = implode( ',', $this->mScriptLoaderClassList );
 235                 } else {
 236                         $class_list = implode( ',', $forceClassAry );
 237                 }
 238
 239                 $debug_param = ( $wgDebugJavaScript ||
 240                                                  $wgRequest->getVal( 'debug' ) == 'true' ||
 241                                                  $wgRequest->getVal( 'debug' ) == '1' )
 242                                          ? '&debug=true' : '';
 243
 244                 //@@todo intelligent unique id generation based on svn version of file (rather than just grabbing the $wgStyleVersion var)
 245                 //@@todo we should check the packaged message text in this javascript file for updates and update the $mScriptLoaderURID id (in getJsClassFromPath)
 246
 247                 //generate the unique request param (combine with the most recent revision id of any wiki page with the $wgStyleVersion var)
 248
 249                 return Html::linkedScript( wfScript( 'mwScriptLoader' ) . "?class={$class_list}{$debug_param}&" . $this->getURIDparam() );
 250         }
 251
 252         function getURIDparam(){
 253                 global $wgDebugJavaScript, $wgStyleVersion;
 254                 if( $wgDebugJavaScript ){
 255                         return 'urid=' . time();
 256                 } else {
 257                         return "urid={$wgStyleVersion}_{$this->mLatestScriptRevID}";
 258                 }
 259         }
 260
 261         function getJsClassFromPath( $path ){
 262                 global $wgJSAutoloadClasses, $wgJSAutoloadLocalClasses, $wgScriptPath;
 263
 264                 $scriptLoaderPaths = array_merge( $wgJSAutoloadClasses,  $wgJSAutoloadLocalClasses );
 265                 foreach( $scriptLoaderPaths as $js_class => $js_path ){
 266                         $js_path = "{$wgScriptPath}/{$js_path}";
 267                         if( $path == $js_path )
 268                                 return $js_class;
 269                 }
 270                 return false;
 271         }
 272
 273         /**
 274          * Add a self-contained script tag with the given contents
 275          * @param string $script JavaScript text, no <script> tags
 276          */
 277         function addInlineScript( $script ) {
 278                 $this->mScripts .= "\t\t" . Html::inlineScript( "\n\t\t$script\n\t\t" ) . "\n";
 279         }
 280
 281         function getScript() {
 282                 global $wgEnableScriptLoader;
 283                 if( $wgEnableScriptLoader ){
 284                         //include $this->mScripts (for anything that we could not package into the scriptloader
 285                         return $this->mScripts . "\n" . $this->getScriptLoaderJs() . $this->getHeadItems();
 286                 } else {
 287                         return $this->mScripts . $this->getHeadItems();
 288                 }
 289         }
 290
 291         function getHeadItems() {
 292                 $s = '';
 293                 foreach ( $this->mHeadItems as $item ) {
 294                         $s .= $item;
 295                 }
 296                 return $s;
 297         }
 298
 299         function addHeadItem( $name, $value ) {
 300                 $this->mHeadItems[$name] = $value;
 301         }
 302
 303         function hasHeadItem( $name ) {
 304                 return isset( $this->mHeadItems[$name] );
 305         }
 306
 307         function setETag($tag) { $this->mETag = $tag; }
 308         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 309         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 310
 311         function addLink( $linkarr ) {
 312                 # $linkarr should be an associative array of attributes. We'll escape on output.
 313                 array_push( $this->mLinktags, $linkarr );
 314         }
 315
 316         # Get all links added by extensions
 317         function getExtStyle() {
 318                 return $this->mExtStyles;
 319         }
 320
 321         function addMetadataLink( $linkarr ) {
 322                 # note: buggy CC software only reads first "meta" link
 323                 static $haveMeta = false;
 324                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 325                 $this->addLink( $linkarr );
 326                 $haveMeta = true;
 327         }
 328
 329         /**
 330          * checkLastModified tells the client to use the client-cached page if
 331          * possible. If sucessful, the OutputPage is disabled so that
 332          * any future call to OutputPage->output() have no effect.
 333          *
 334          * Side effect: sets mLastModified for Last-Modified header
 335          *
 336          * @return bool True iff cache-ok headers was sent.
 337          */
 338         function checkLastModified( $timestamp ) {
 339                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 340
 341                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 342                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 343                         return false;
 344                 }
 345                 if( !$wgCachePages ) {
 346                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 347                         return false;
 348                 }
 349                 if( $wgUser->getOption( 'nocache' ) ) {
 350                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 351                         return false;
 352                 }
 353
 354                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 355                 $modifiedTimes = array(
 356                         'page' => $timestamp,
 357                         'user' => $wgUser->getTouched(),
 358                         'epoch' => $wgCacheEpoch
 359                 );
 360                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 361
 362                 $maxModified = max( $modifiedTimes );
 363                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 364
 365                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 366                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 367                         return false;
 368                 }
 369
 370                 # Make debug info
 371                 $info = '';
 372                 foreach ( $modifiedTimes as $name => $value ) {
 373                         if ( $info !== '' ) {
 374                                 $info .= ', ';
 375                         }
 376                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 377                 }
 378
 379                 # IE sends sizes after the date like this:
 380                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 381                 # this breaks strtotime().
 382                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 383
 384                 wfSuppressWarnings(); // E_STRICT system time bitching
 385                 $clientHeaderTime = strtotime( $clientHeader );
 386                 wfRestoreWarnings();
 387                 if ( !$clientHeaderTime ) {
 388                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 389                         return false;
 390                 }
 391                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 392
 393                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 394                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 395                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 396                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 397                 if( $clientHeaderTime < $maxModified ) {
 398                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 399                         return false;
 400                 }
 401
 402                 # Not modified
 403                 # Give a 304 response code and disable body output
 404                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 405                 ini_set('zlib.output_compression', 0);
 406                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 407                 $this->sendCacheControl();
 408                 $this->disable();
 409
 410                 // Don't output a compressed blob when using ob_gzhandler;
 411                 // it's technically against HTTP spec and seems to confuse
 412                 // Firefox when the response gets split over two packets.
 413                 wfClearOutputBuffers();
 414
 415                 return true;
 416         }
 417
 418         function setPageTitleActionText( $text ) {
 419                 $this->mPageTitleActionText = $text;
 420         }
 421
 422         function getPageTitleActionText () {
 423                 if ( isset( $this->mPageTitleActionText ) ) {
 424                         return $this->mPageTitleActionText;
 425                 }
 426         }
 427
 428         /**
 429          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 430          *
 431          * @param $policy string The literal string to output as the contents of
 432          *   the meta tag.  Will be parsed according to the spec and output in
 433          *   standardized form.
 434          * @return null
 435          */
 436         public function setRobotPolicy( $policy ) {
 437                 $policy = explode( ',', $policy );
 438                 $policy = array_map( 'trim', $policy );
 439
 440                 # The default policy is follow, so if nothing is said explicitly, we
 441                 # do that.
 442                 if( in_array( 'nofollow', $policy ) ) {
 443                         $this->mFollowPolicy = 'nofollow';
 444                 } else {
 445                         $this->mFollowPolicy = 'follow';
 446                 }
 447
 448                 if( in_array( 'noindex', $policy ) ) {
 449                         $this->mIndexPolicy = 'noindex';
 450                 } else {
 451                         $this->mIndexPolicy = 'index';
 452                 }
 453         }
 454
 455         /**
 456          * Set the index policy for the page, but leave the follow policy un-
 457          * touched.
 458          *
 459          * @param $policy string Either 'index' or 'noindex'.
 460          * @return null
 461          */
 462         public function setIndexPolicy( $policy ) {
 463                 $policy = trim( $policy );
 464                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 465                         $this->mIndexPolicy = $policy;
 466                 }
 467         }
 468
 469         /**
 470          * Set the follow policy for the page, but leave the index policy un-
 471          * touched.
 472          *
 473          * @param $policy string Either 'follow' or 'nofollow'.
 474          * @return null
 475          */
 476         public function setFollowPolicy( $policy ) {
 477                 $policy = trim( $policy );
 478                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 479                         $this->mFollowPolicy = $policy;
 480                 }
 481         }
 482
 483         /**
 484          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 485          */
 486         public function setHTMLTitle( $name ) {
 487                 $this->mHTMLtitle = $name;
 488         }
 489
 490         /**
 491          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 492          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 493          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 494          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 495          */
 496         public function setPageTitle( $name ) {
 497                 global $wgContLang;
 498                 $name = $wgContLang->convert( $name, true );
 499                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 500                 # but leave "<i>foobar</i>" alone
 501                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 502                 $this->mPagetitle = $nameWithTags;
 503
 504                 $taction =  $this->getPageTitleActionText();
 505                 if( !empty( $taction ) ) {
 506                         $name .= ' - '.$taction;
 507                 }
 508
 509                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 510                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 511         }
 512
 513         public function setTitle( $t ) {
 514                 $this->mTitle = $t;
 515         }
 516
 517         public function getTitle() {
 518                 if ( $this->mTitle instanceof Title ) {
 519                         return $this->mTitle;
 520                 }
 521                 else {
 522                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 523                         global $wgTitle;
 524                         return $wgTitle;
 525                 }
 526         }
 527
 528         public function getHTMLTitle() { return $this->mHTMLtitle; }
 529         public function getPageTitle() { return $this->mPagetitle; }
 530         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 531         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 532         public function getSubtitle() { return $this->mSubtitle; }
 533         public function isArticle() { return $this->mIsarticle; }
 534         public function setPrintable() { $this->mPrintable = true; }
 535         public function isPrintable() { return $this->mPrintable; }
 536         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 537         public function isSyndicated() { return $this->mShowFeedLinks; }
 538         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 539         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 540         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 541         public function getOnloadHandler() { return $this->mOnloadHandler; }
 542         public function disable() { $this->mDoNothing = true; }
 543         public function isDisabled() { return $this->mDoNothing; }
 544
 545         public function setArticleRelated( $v ) {
 546                 $this->mIsArticleRelated = $v;
 547                 if ( !$v ) {
 548                         $this->mIsarticle = false;
 549                 }
 550         }
 551         public function setArticleFlag( $v ) {
 552                 $this->mIsarticle = $v;
 553                 if ( $v ) {
 554                         $this->mIsArticleRelated = $v;
 555                 }
 556         }
 557
 558         public function isArticleRelated() { return $this->mIsArticleRelated; }
 559
 560         public function getLanguageLinks() { return $this->mLanguageLinks; }
 561         public function addLanguageLinks($newLinkArray) {
 562                 $this->mLanguageLinks += $newLinkArray;
 563         }
 564         public function setLanguageLinks($newLinkArray) {
 565                 $this->mLanguageLinks = $newLinkArray;
 566         }
 567
 568         public function getCategoryLinks() {
 569                 return $this->mCategoryLinks;
 570         }
 571
 572         /**
 573          * Add an array of categories, with names in the keys
 574          */
 575         public function addCategoryLinks( $categories ) {
 576                 global $wgUser, $wgContLang;
 577
 578                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 579                         return;
 580                 }
 581
 582                 # Add the links to a LinkBatch
 583                 $arr = array( NS_CATEGORY => $categories );
 584                 $lb = new LinkBatch;
 585                 $lb->setArray( $arr );
 586
 587                 # Fetch existence plus the hiddencat property
 588                 $dbr = wfGetDB( DB_SLAVE );
 589                 $pageTable = $dbr->tableName( 'page' );
 590                 $where = $lb->constructSet( 'page', $dbr );
 591                 $propsTable = $dbr->tableName( 'page_props' );
 592                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 593                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 594                 $res = $dbr->query( $sql, __METHOD__ );
 595
 596                 # Add the results to the link cache
 597                 $lb->addResultToCache( LinkCache::singleton(), $res );
 598
 599                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 600                 $categories = array_combine( array_keys( $categories ),
 601                         array_fill( 0, count( $categories ), 'normal' ) );
 602
 603                 # Mark hidden categories
 604                 foreach ( $res as $row ) {
 605                         if ( isset( $row->pp_value ) ) {
 606                                 $categories[$row->page_title] = 'hidden';
 607                         }
 608                 }
 609
 610                 # Add the remaining categories to the skin
 611                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 612                         $sk = $wgUser->getSkin();
 613                         foreach ( $categories as $category => $type ) {
 614                                 $origcategory = $category;
 615                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 616                                 $wgContLang->findVariantLink( $category, $title, true );
 617                                 if ( $category != $origcategory )
 618                                         if ( array_key_exists( $category, $categories ) )
 619                                                 continue;
 620                                 $text = $wgContLang->convertHtml( $title->getText() );
 621                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 622                         }
 623                 }
 624         }
 625
 626         public function setCategoryLinks($categories) {
 627                 $this->mCategoryLinks = array();
 628                 $this->addCategoryLinks($categories);
 629         }
 630
 631         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 632         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 633
 634         public function disallowUserJs() { $this->mAllowUserJs = false; }
 635         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 636
 637         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 638         public function addHTML( $text ) { $this->mBodytext .= $text; }
 639         public function clearHTML() { $this->mBodytext = ''; }
 640         public function getHTML() { return $this->mBodytext; }
 641         public function debug( $text ) { $this->mDebugtext .= $text; }
 642
 643         /* @deprecated */
 644         public function setParserOptions( $options ) {
 645                 wfDeprecated( __METHOD__ );
 646                 return $this->parserOptions( $options );
 647         }
 648
 649         public function parserOptions( $options = null ) {
 650                 if ( !$this->mParserOptions ) {
 651                         $this->mParserOptions = new ParserOptions;
 652                 }
 653                 return wfSetVar( $this->mParserOptions, $options );
 654         }
 655
 656         /**
 657          * Set the revision ID which will be seen by the wiki text parser
 658          * for things such as embedded {{REVISIONID}} variable use.
 659          * @param mixed $revid an integer, or NULL
 660          * @return mixed previous value
 661          */
 662         public function setRevisionId( $revid ) {
 663                 $val = is_null( $revid ) ? null : intval( $revid );
 664                 return wfSetVar( $this->mRevisionId, $val );
 665         }
 666
 667         public function getRevisionId() {
 668                 return $this->mRevisionId;
 669         }
 670
 671         /**
 672          * Convert wikitext to HTML and add it to the buffer
 673          * Default assumes that the current page title will
 674          * be used.
 675          *
 676          * @param string $text
 677          * @param bool   $linestart
 678          */
 679         public function addWikiText( $text, $linestart = true ) {
 680                 $title = $this->getTitle(); // Work arround E_STRICT
 681                 $this->addWikiTextTitle( $text, $title, $linestart );
 682         }
 683
 684         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 685                 $this->addWikiTextTitle($text, $title, $linestart);
 686         }
 687
 688         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 689                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 690         }
 691
 692         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 693                 global $wgParser;
 694
 695                 wfProfileIn( __METHOD__ );
 696
 697                 wfIncrStats( 'pcache_not_possible' );
 698
 699                 $popts = $this->parserOptions();
 700                 $oldTidy = $popts->setTidy( $tidy );
 701
 702                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 703                         $linestart, true, $this->mRevisionId );
 704
 705                 $popts->setTidy( $oldTidy );
 706
 707                 $this->addParserOutput( $parserOutput );
 708
 709                 wfProfileOut( __METHOD__ );
 710         }
 711
 712         /**
 713          * @todo document
 714          * @param ParserOutput object &$parserOutput
 715          */
 716         public function addParserOutputNoText( &$parserOutput ) {
 717                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 718
 719                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 720                 $this->addCategoryLinks( $parserOutput->getCategories() );
 721                 $this->mNewSectionLink = $parserOutput->getNewSection();
 722                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 723
 724                 if( is_null( $wgExemptFromUserRobotsControl ) ) {
 725                         $bannedNamespaces = $wgContentNamespaces;
 726                 } else {
 727                         $bannedNamespaces = $wgExemptFromUserRobotsControl;
 728                 }
 729                 if( !in_array( $this->getTitle()->getNamespace(), $bannedNamespaces ) ) {
 730                         # FIXME (bug 14900): This overrides $wgArticleRobotPolicies, and it
 731                         # shouldn't
 732                         $this->setIndexPolicy( $parserOutput->getIndexPolicy() );
 733                 }
 734
 735                 $this->mParseWarnings = $parserOutput->getWarnings();
 736                 if ( $parserOutput->getCacheTime() == -1 ) {
 737                         $this->enableClientCache( false );
 738                 }
 739                 $this->mNoGallery = $parserOutput->getNoGallery();
 740                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 741                 // Versioning...
 742                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 743                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 744                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 745                         } else {
 746                                 $this->mTemplateIds[$ns] = $dbks;
 747                         }
 748                 }
 749                 // Page title
 750                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 751                         $this->setPageTitle( $dt );
 752                 else if ( ( $title = $parserOutput->getTitleText() ) != '' )
 753                         $this->setPageTitle( $title );
 754
 755                 // Hooks registered in the object
 756                 global $wgParserOutputHooks;
 757                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 758                         list( $hookName, $data ) = $hookInfo;
 759                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 760                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 761                         }
 762                 }
 763
 764                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 765         }
 766
 767         /**
 768          * @todo document
 769          * @param ParserOutput &$parserOutput
 770          */
 771         function addParserOutput( &$parserOutput ) {
 772                 $this->addParserOutputNoText( $parserOutput );
 773                 $text = $parserOutput->getText();
 774                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 775                 $this->addHTML( $text );
 776         }
 777
 778         /**
 779          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 780          * Saves the text into the parser cache if possible.
 781          *
 782          * @param string  $text
 783          * @param Article $article
 784          * @param bool    $cache
 785          * @deprecated Use Article::outputWikitext
 786          */
 787         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 788                 global $wgParser;
 789
 790                 wfDeprecated( __METHOD__ );
 791
 792                 $popts = $this->parserOptions();
 793                 $popts->setTidy(true);
 794                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 795                         $popts, true, true, $this->mRevisionId );
 796                 $popts->setTidy(false);
 797                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 798                         $parserCache = ParserCache::singleton();
 799                         $parserCache->save( $parserOutput, $article, $popts);
 800                 }
 801
 802                 $this->addParserOutput( $parserOutput );
 803         }
 804
 805         /**
 806          * @deprecated use addWikiTextTidy()
 807          */
 808         public function addSecondaryWikiText( $text, $linestart = true ) {
 809                 wfDeprecated( __METHOD__ );
 810                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 811         }
 812
 813         /**
 814          * Add wikitext with tidy enabled
 815          */
 816         public function addWikiTextTidy(  $text, $linestart = true ) {
 817                 $title = $this->getTitle();
 818                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 819         }
 820
 821
 822         /**
 823          * Add the output of a QuickTemplate to the output buffer
 824          *
 825          * @param QuickTemplate $template
 826          */
 827         public function addTemplate( &$template ) {
 828                 ob_start();
 829                 $template->execute();
 830                 $this->addHTML( ob_get_contents() );
 831                 ob_end_clean();
 832         }
 833
 834         /**
 835          * Parse wikitext and return the HTML.
 836          *
 837          * @param string $text
 838          * @param bool   $linestart Is this the start of a line?
 839          * @param bool   $interface ??
 840          */
 841         public function parse( $text, $linestart = true, $interface = false ) {
 842                 global $wgParser;
 843                 if( is_null( $this->getTitle() ) ) {
 844                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 845                 }
 846                 $popts = $this->parserOptions();
 847                 if ( $interface) { $popts->setInterfaceMessage(true); }
 848                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 849                         $linestart, true, $this->mRevisionId );
 850                 if ( $interface) { $popts->setInterfaceMessage(false); }
 851                 return $parserOutput->getText();
 852         }
 853
 854         /** Parse wikitext, strip paragraphs, and return the HTML. */
 855         public function parseInline( $text, $linestart = true, $interface = false ) {
 856                 $parsed = $this->parse( $text, $linestart, $interface );
 857
 858                 $m = array();
 859                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 860                         $parsed = $m[1];
 861                 }
 862
 863                 return $parsed;
 864         }
 865
 866         /**
 867          * @param Article $article
 868          * @param User    $user
 869          *
 870          * @deprecated
 871          *
 872          * @return bool True if successful, else false.
 873          */
 874         public function tryParserCache( &$article ) {
 875                 wfDeprecated( __METHOD__ );
 876                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 877
 878                 if ($parserOutput !== false) {
 879                         $this->addParserOutput( $parserOutput );
 880                         return true;
 881                 } else {
 882                         return false;
 883                 }
 884         }
 885
 886         /**
 887          * @param int $maxage Maximum cache time on the Squid, in seconds.
 888          */
 889         public function setSquidMaxage( $maxage ) {
 890                 $this->mSquidMaxage = $maxage;
 891         }
 892
 893         /**
 894          * Use enableClientCache(false) to force it to send nocache headers
 895          * @param $state ??
 896          */
 897         public function enableClientCache( $state ) {
 898                 return wfSetVar( $this->mEnableClientCache, $state );
 899         }
 900
 901         function getCacheVaryCookies() {
 902                 global $wgCookiePrefix, $wgCacheVaryCookies;
 903                 static $cookies;
 904                 if ( $cookies === null ) {
 905                         $cookies = array_merge(
 906                                 array(
 907                                         "{$wgCookiePrefix}Token",
 908                                         "{$wgCookiePrefix}LoggedOut",
 909                                         session_name()
 910                                 ),
 911                                 $wgCacheVaryCookies
 912                         );
 913                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 914                 }
 915                 return $cookies;
 916         }
 917
 918         function uncacheableBecauseRequestVars() {
 919                 global $wgRequest;
 920                 return  $wgRequest->getText('useskin', false) === false
 921                         && $wgRequest->getText('uselang', false) === false;
 922         }
 923
 924         /**
 925          * Check if the request has a cache-varying cookie header
 926          * If it does, it's very important that we don't allow public caching
 927          */
 928         function haveCacheVaryCookies() {
 929                 global $wgRequest;
 930                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 931                 if ( $cookieHeader === false ) {
 932                         return false;
 933                 }
 934                 $cvCookies = $this->getCacheVaryCookies();
 935                 foreach ( $cvCookies as $cookieName ) {
 936                         # Check for a simple string match, like the way squid does it
 937                         if ( strpos( $cookieHeader, $cookieName ) ) {
 938                                 wfDebug( __METHOD__.": found $cookieName\n" );
 939                                 return true;
 940                         }
 941                 }
 942                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 943                 return false;
 944         }
 945
 946         /** Get a complete X-Vary-Options header */
 947         public function getXVO() {
 948                 $cvCookies = $this->getCacheVaryCookies();
 949                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 950                 $first = true;
 951                 foreach ( $cvCookies as $cookieName ) {
 952                         if ( $first ) {
 953                                 $first = false;
 954                         } else {
 955                                 $xvo .= ';';
 956                         }
 957                         $xvo .= 'string-contains=' . $cookieName;
 958                 }
 959                 return $xvo;
 960         }
 961
 962         public function sendCacheControl() {
 963                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 964
 965                 $response = $wgRequest->response();
 966                 if ($wgUseETag && $this->mETag)
 967                         $response->header("ETag: $this->mETag");
 968
 969                 # don't serve compressed data to clients who can't handle it
 970                 # maintain different caches for logged-in users and non-logged in ones
 971                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 972
 973                 if ( $wgUseXVO ) {
 974                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 975                         $response->header( $this->getXVO() );
 976                 }
 977
 978                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 979                         if( $wgUseSquid && session_id() == '' &&
 980                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 981                         {
 982                                 if ( $wgUseESI ) {
 983                                         # We'll purge the proxy cache explicitly, but require end user agents
 984                                         # to revalidate against the proxy on each visit.
 985                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 986                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 987                                         # start with a shorter timeout for initial testing
 988                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 989                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 990                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 991                                 } else {
 992                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 993                                         # to revalidate against the proxy on each visit.
 994                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 995                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 996                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 997                                         # start with a shorter timeout for initial testing
 998                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 999                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
1000                                 }
1001                         } else {
1002                                 # We do want clients to cache if they can, but they *must* check for updates
1003                                 # on revisiting the page.
1004                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
1005                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1006                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
1007                         }
1008                         if($this->mLastModified) {
1009                                 $response->header( "Last-Modified: {$this->mLastModified}" );
1010                         }
1011                 } else {
1012                         wfDebug( __METHOD__ . ": no caching **\n", false );
1013
1014                         # In general, the absence of a last modified header should be enough to prevent
1015                         # the client from using its cache. We send a few other things just to make sure.
1016                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
1017                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
1018                         $response->header( 'Pragma: no-cache' );
1019                 }
1020         }
1021
1022         /**
1023          * Finally, all the text has been munged and accumulated into
1024          * the object, let's actually output it:
1025          */
1026         public function output() {
1027                 global $wgUser, $wgOutputEncoding, $wgRequest;
1028                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1029                 global $wgUseAjax, $wgAjaxWatch;
1030                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1031                 global $wgArticle;
1032
1033                 if( $this->mDoNothing ){
1034                         return;
1035                 }
1036                 wfProfileIn( __METHOD__ );
1037                 if ( '' != $this->mRedirect ) {
1038                         # Standards require redirect URLs to be absolute
1039                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1040                         if( $this->mRedirectCode == '301') {
1041                                 if( !$wgDebugRedirects ) {
1042                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
1043                                 }
1044                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1045                         }
1046                         $this->sendCacheControl();
1047
1048                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
1049                         if( $wgDebugRedirects ) {
1050                                 $url = htmlspecialchars( $this->mRedirect );
1051                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1052                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1053                                 print "</body>\n</html>\n";
1054                         } else {
1055                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
1056                         }
1057                         wfProfileOut( __METHOD__ );
1058                         return;
1059                 }
1060                 elseif ( $this->mStatusCode )
1061                 {
1062                         $statusMessage = array(
1063                                 100 => 'Continue',
1064                                 101 => 'Switching Protocols',
1065                                 102 => 'Processing',
1066                                 200 => 'OK',
1067                                 201 => 'Created',
1068                                 202 => 'Accepted',
1069                                 203 => 'Non-Authoritative Information',
1070                                 204 => 'No Content',
1071                                 205 => 'Reset Content',
1072                                 206 => 'Partial Content',
1073                                 207 => 'Multi-Status',
1074                                 300 => 'Multiple Choices',
1075                                 301 => 'Moved Permanently',
1076                                 302 => 'Found',
1077                                 303 => 'See Other',
1078                                 304 => 'Not Modified',
1079                                 305 => 'Use Proxy',
1080                                 307 => 'Temporary Redirect',
1081                                 400 => 'Bad Request',
1082                                 401 => 'Unauthorized',
1083                                 402 => 'Payment Required',
1084                                 403 => 'Forbidden',
1085                                 404 => 'Not Found',
1086                                 405 => 'Method Not Allowed',
1087                                 406 => 'Not Acceptable',
1088                                 407 => 'Proxy Authentication Required',
1089                                 408 => 'Request Timeout',
1090                                 409 => 'Conflict',
1091                                 410 => 'Gone',
1092                                 411 => 'Length Required',
1093                                 412 => 'Precondition Failed',
1094                                 413 => 'Request Entity Too Large',
1095                                 414 => 'Request-URI Too Large',
1096                                 415 => 'Unsupported Media Type',
1097                                 416 => 'Request Range Not Satisfiable',
1098                                 417 => 'Expectation Failed',
1099                                 422 => 'Unprocessable Entity',
1100                                 423 => 'Locked',
1101                                 424 => 'Failed Dependency',
1102                                 500 => 'Internal Server Error',
1103                                 501 => 'Not Implemented',
1104                                 502 => 'Bad Gateway',
1105                                 503 => 'Service Unavailable',
1106                                 504 => 'Gateway Timeout',
1107                                 505 => 'HTTP Version Not Supported',
1108                                 507 => 'Insufficient Storage'
1109                         );
1110
1111                         if ( $statusMessage[$this->mStatusCode] )
1112                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
1113                 }
1114
1115                 $sk = $wgUser->getSkin();
1116
1117                 // add our core scripts to output
1118                 $this->addCoreScripts2Top();
1119
1120                 if ( $wgUseAjax ) {
1121                         $this->addScriptFile( 'ajax.js' );
1122
1123                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1124
1125                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1126                                 $this->addScriptFile( 'ajaxwatch.js' );
1127                         }
1128
1129                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1130                                 $this->addScriptFile( 'mwsuggest.js' );
1131                         }
1132                 }
1133
1134                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1135                         $this->addScriptFile( 'rightclickedit.js' );
1136                 }
1137
1138                 if( $wgUniversalEditButton ) {
1139                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1140                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1141                                 // Original UniversalEditButton
1142                                 $this->addLink( array(
1143                                         'rel' => 'alternate',
1144                                         'type' => 'application/x-wiki',
1145                                         'title' => wfMsg( 'edit' ),
1146                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1147                                 ) );
1148                                 // Alternate edit link
1149                                 $this->addLink( array(
1150                                         'rel' => 'edit',
1151                                         'title' => wfMsg( 'edit' ),
1152                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1153                                 ) );
1154                         }
1155                 }
1156
1157                 # Buffer output; final headers may depend on later processing
1158                 ob_start();
1159
1160                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1161                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1162
1163                 if ($this->mArticleBodyOnly) {
1164                         $this->out($this->mBodytext);
1165                 } else {
1166                         // Hook that allows last minute changes to the output page, e.g.
1167                         // adding of CSS or Javascript by extensions.
1168                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1169
1170                         wfProfileIn( 'Output-skin' );
1171                         $sk->outputPage( $this );
1172                         wfProfileOut( 'Output-skin' );
1173                 }
1174
1175                 $this->sendCacheControl();
1176                 ob_end_flush();
1177                 wfProfileOut( __METHOD__ );
1178         }
1179
1180         /**
1181          * Actually output something with print(). Performs an iconv to the
1182          * output encoding, if needed.
1183          * @param string $ins The string to output
1184          */
1185         public function out( $ins ) {
1186                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1187                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1188                         $outs = $ins;
1189                 } else {
1190                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1191                         if ( false === $outs ) { $outs = $ins; }
1192                 }
1193                 print $outs;
1194         }
1195
1196         /**
1197          * @todo document
1198          */
1199         public static function setEncodings() {
1200                 global $wgInputEncoding, $wgOutputEncoding;
1201                 global $wgContLang;
1202
1203                 $wgInputEncoding = strtolower( $wgInputEncoding );
1204
1205                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1206                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1207                         return;
1208                 }
1209                 $wgOutputEncoding = $wgInputEncoding;
1210         }
1211
1212         /**
1213          * Deprecated, use wfReportTime() instead.
1214          * @return string
1215          * @deprecated
1216          */
1217         public function reportTime() {
1218                 wfDeprecated( __METHOD__ );
1219                 $time = wfReportTime();
1220                 return $time;
1221         }
1222
1223         /**
1224          * Produce a "user is blocked" page.
1225          *
1226          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1227          * @return nothing
1228          */
1229         function blockedPage( $return = true ) {
1230                 global $wgUser, $wgContLang, $wgLang;
1231
1232                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1233                 $this->setRobotPolicy( 'noindex,nofollow' );
1234                 $this->setArticleRelated( false );
1235
1236                 $name = User::whoIs( $wgUser->blockedBy() );
1237                 $reason = $wgUser->blockedFor();
1238                 if( $reason == '' ) {
1239                         $reason = wfMsg( 'blockednoreason' );
1240                 }
1241                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1242                 $ip = wfGetIP();
1243
1244                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1245
1246                 $blockid = $wgUser->mBlock->mId;
1247
1248                 $blockExpiry = $wgUser->mBlock->mExpiry;
1249                 if ( $blockExpiry == 'infinity' ) {
1250                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1251                         // Search for localization in 'ipboptions'
1252                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1253                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1254                                 if ( strpos( $option, ":" ) === false )
1255                                         continue;
1256                                 list( $show, $value ) = explode( ":", $option );
1257                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1258                                         $blockExpiry = $show;
1259                                         break;
1260                                 }
1261                         }
1262                 } else {
1263                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1264                 }
1265
1266                 if ( $wgUser->mBlock->mAuto ) {
1267                         $msg = 'autoblockedtext';
1268                 } else {
1269                         $msg = 'blockedtext';
1270                 }
1271
1272                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1273                  * This could be a username, an ip range, or a single ip. */
1274                 $intended = $wgUser->mBlock->mAddress;
1275
1276                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1277
1278                 # Don't auto-return to special pages
1279                 if( $return ) {
1280                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1281                         $this->returnToMain( null, $return );
1282                 }
1283         }
1284
1285         /**
1286          * Output a standard error page
1287          *
1288          * @param string $title Message key for page title
1289          * @param string $msg Message key for page text
1290          * @param array $params Message parameters
1291          */
1292         public function showErrorPage( $title, $msg, $params = array() ) {
1293                 if ( $this->getTitle() ) {
1294                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1295                 }
1296                 $this->setPageTitle( wfMsg( $title ) );
1297                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1298                 $this->setRobotPolicy( 'noindex,nofollow' );
1299                 $this->setArticleRelated( false );
1300                 $this->enableClientCache( false );
1301                 $this->mRedirect = '';
1302                 $this->mBodytext = '';
1303
1304                 array_unshift( $params, 'parse' );
1305                 array_unshift( $params, $msg );
1306                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1307
1308                 $this->returnToMain();
1309         }
1310
1311         /**
1312          * Output a standard permission error page
1313          *
1314          * @param array $errors Error message keys
1315          */
1316         public function showPermissionsErrorPage( $errors, $action = null )
1317         {
1318                 $this->mDebugtext .= 'Original title: ' .
1319                 $this->getTitle()->getPrefixedText() . "\n";
1320                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1321                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1322                 $this->setRobotPolicy( 'noindex,nofollow' );
1323                 $this->setArticleRelated( false );
1324                 $this->enableClientCache( false );
1325                 $this->mRedirect = '';
1326                 $this->mBodytext = '';
1327                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1328         }
1329
1330         /** @deprecated */
1331         public function errorpage( $title, $msg ) {
1332                 wfDeprecated( __METHOD__ );
1333                 throw new ErrorPageError( $title, $msg );
1334         }
1335
1336         /**
1337          * Display an error page indicating that a given version of MediaWiki is
1338          * required to use it
1339          *
1340          * @param mixed $version The version of MediaWiki needed to use the page
1341          */
1342         public function versionRequired( $version ) {
1343                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1344                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1345                 $this->setRobotPolicy( 'noindex,nofollow' );
1346                 $this->setArticleRelated( false );
1347                 $this->mBodytext = '';
1348
1349                 $this->addWikiMsg( 'versionrequiredtext', $version );
1350                 $this->returnToMain();
1351         }
1352
1353         /**
1354          * Display an error page noting that a given permission bit is required.
1355          *
1356          * @param string $permission key required
1357          */
1358         public function permissionRequired( $permission ) {
1359                 global $wgLang;
1360
1361                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1362                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1363                 $this->setRobotPolicy( 'noindex,nofollow' );
1364                 $this->setArticleRelated( false );
1365                 $this->mBodytext = '';
1366
1367                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1368                         User::getGroupsWithPermission( $permission ) );
1369                 if( $groups ) {
1370                         $this->addWikiMsg( 'badaccess-groups',
1371                                 $wgLang->commaList( $groups ),
1372                                 count( $groups) );
1373                 } else {
1374                         $this->addWikiMsg( 'badaccess-group0' );
1375                 }
1376                 $this->returnToMain();
1377         }
1378
1379         /**
1380          * Use permissionRequired.
1381          * @deprecated
1382          */
1383         public function sysopRequired() {
1384                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1385         }
1386
1387         /**
1388          * Use permissionRequired.
1389          * @deprecated
1390          */
1391         public function developerRequired() {
1392                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1393         }
1394
1395         /**
1396          * Produce the stock "please login to use the wiki" page
1397          */
1398         public function loginToUse() {
1399                 global $wgUser, $wgContLang;
1400
1401                 if( $wgUser->isLoggedIn() ) {
1402                         $this->permissionRequired( 'read' );
1403                         return;
1404                 }
1405
1406                 $skin = $wgUser->getSkin();
1407
1408                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1409                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1410                 $this->setRobotPolicy( 'noindex,nofollow' );
1411                 $this->setArticleFlag( false );
1412
1413                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1414                 $loginLink = $skin->link(
1415                         $loginTitle,
1416                         wfMsgHtml( 'loginreqlink' ),
1417                         array(),
1418                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1419                         array( 'known', 'noclasses' )
1420                 );
1421                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1422                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1423
1424                 # Don't return to the main page if the user can't read it
1425                 # otherwise we'll end up in a pointless loop
1426                 $mainPage = Title::newMainPage();
1427                 if( $mainPage->userCanRead() )
1428                         $this->returnToMain( null, $mainPage );
1429         }
1430
1431         /** @deprecated */
1432         public function databaseError( $fname, $sql, $error, $errno ) {
1433                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1434         }
1435
1436         /**
1437          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1438          * @return string The wikitext error-messages, formatted into a list.
1439          */
1440         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1441                 if ($action == null) {
1442                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1443                 } else {
1444                         global $wgLang;
1445                         $action_desc = wfMsgNoTrans( "action-$action" );
1446                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1447                 }
1448
1449                 if (count( $errors ) > 1) {
1450                         $text .= '<ul class="permissions-errors">' . "\n";
1451
1452                         foreach( $errors as $error )
1453                         {
1454                                 $text .= '<li>';
1455                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1456                                 $text .= "</li>\n";
1457                         }
1458                         $text .= '</ul>';
1459                 } else {
1460                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1461                 }
1462
1463                 return $text;
1464         }
1465
1466         /**
1467          * Display a page stating that the Wiki is in read-only mode,
1468          * and optionally show the source of the page that the user
1469          * was trying to edit.  Should only be called (for this
1470          * purpose) after wfReadOnly() has returned true.
1471          *
1472          * For historical reasons, this function is _also_ used to
1473          * show the error message when a user tries to edit a page
1474          * they are not allowed to edit.  (Unless it's because they're
1475          * blocked, then we show blockedPage() instead.)  In this
1476          * case, the second parameter should be set to true and a list
1477          * of reasons supplied as the third parameter.
1478          *
1479          * @todo Needs to be split into multiple functions.
1480          *
1481          * @param string $source    Source code to show (or null).
1482          * @param bool   $protected Is this a permissions error?
1483          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1484          */
1485         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1486                 global $wgUser;
1487                 $skin = $wgUser->getSkin();
1488
1489                 $this->setRobotPolicy( 'noindex,nofollow' );
1490                 $this->setArticleRelated( false );
1491
1492                 // If no reason is given, just supply a default "I can't let you do
1493                 // that, Dave" message.  Should only occur if called by legacy code.
1494                 if ( $protected && empty($reasons) ) {
1495                         $reasons[] = array( 'badaccess-group0' );
1496                 }
1497
1498                 if ( !empty($reasons) ) {
1499                         // Permissions error
1500                         if( $source ) {
1501                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1502                                 $this->setSubtitle(
1503                                         wfMsg(
1504                                                 'viewsourcefor',
1505                                                 $skin->link(
1506                                                         $this->getTitle(),
1507                                                         null,
1508                                                         array(),
1509                                                         array(),
1510                                                         array( 'known', 'noclasses' )
1511                                                 )
1512                                         )
1513                                 );
1514                         } else {
1515                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1516                         }
1517                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1518                 } else {
1519                         // Wiki is read only
1520                         $this->setPageTitle( wfMsg( 'readonly' ) );
1521                         $reason = wfReadOnlyReason();
1522                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1523                 }
1524
1525                 // Show source, if supplied
1526                 if( is_string( $source ) ) {
1527                         $this->addWikiMsg( 'viewsourcetext' );
1528                         $text = Xml::openElement( 'textarea',
1529                                                 array( 'id'   => 'wpTextbox1',
1530                                                        'name' => 'wpTextbox1',
1531                                                        'cols' => $wgUser->getOption( 'cols' ),
1532                                                        'rows' => $wgUser->getOption( 'rows' ),
1533                                                        'readonly' => 'readonly' ) );
1534                         $text .= htmlspecialchars( $source );
1535                         $text .= Xml::closeElement( 'textarea' );
1536                         $this->addHTML( $text );
1537
1538                         // Show templates used by this article
1539                         $skin = $wgUser->getSkin();
1540                         $article = new Article( $this->getTitle() );
1541                         $this->addHTML( "<div class='templatesUsed'>
1542 {$skin->formatTemplates( $article->getUsedTemplates() )}
1543 </div>
1544 " );
1545                 }
1546
1547                 # If the title doesn't exist, it's fairly pointless to print a return
1548                 # link to it.  After all, you just tried editing it and couldn't, so
1549                 # what's there to do there?
1550                 if( $this->getTitle()->exists() ) {
1551                         $this->returnToMain( null, $this->getTitle() );
1552                 }
1553         }
1554
1555         /** @deprecated */
1556         public function fatalError( $message ) {
1557                 wfDeprecated( __METHOD__ );
1558                 throw new FatalError( $message );
1559         }
1560
1561         /** @deprecated */
1562         public function unexpectedValueError( $name, $val ) {
1563                 wfDeprecated( __METHOD__ );
1564                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1565         }
1566
1567         /** @deprecated */
1568         public function fileCopyError( $old, $new ) {
1569                 wfDeprecated( __METHOD__ );
1570                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1571         }
1572
1573         /** @deprecated */
1574         public function fileRenameError( $old, $new ) {
1575                 wfDeprecated( __METHOD__ );
1576                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1577         }
1578
1579         /** @deprecated */
1580         public function fileDeleteError( $name ) {
1581                 wfDeprecated( __METHOD__ );
1582                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1583         }
1584
1585         /** @deprecated */
1586         public function fileNotFoundError( $name ) {
1587                 wfDeprecated( __METHOD__ );
1588                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1589         }
1590
1591         public function showFatalError( $message ) {
1592                 $this->setPageTitle( wfMsg( "internalerror" ) );
1593                 $this->setRobotPolicy( "noindex,nofollow" );
1594                 $this->setArticleRelated( false );
1595                 $this->enableClientCache( false );
1596                 $this->mRedirect = '';
1597                 $this->mBodytext = $message;
1598         }
1599
1600         public function showUnexpectedValueError( $name, $val ) {
1601                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1602         }
1603
1604         public function showFileCopyError( $old, $new ) {
1605                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1606         }
1607
1608         public function showFileRenameError( $old, $new ) {
1609                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1610         }
1611
1612         public function showFileDeleteError( $name ) {
1613                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1614         }
1615
1616         public function showFileNotFoundError( $name ) {
1617                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1618         }
1619
1620         /**
1621          * Add a "return to" link pointing to a specified title
1622          *
1623          * @param Title $title Title to link
1624          * @param string $query Query string
1625          */
1626         public function addReturnTo( $title, $query = array() ) {
1627                 global $wgUser;
1628                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1629                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1630                         $title, null, array(), $query ) );
1631                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1632         }
1633
1634         /**
1635          * Add a "return to" link pointing to a specified title,
1636          * or the title indicated in the request, or else the main page
1637          *
1638          * @param null $unused No longer used
1639          * @param Title $returnto Title to return to
1640          */
1641         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1642                 global $wgRequest;
1643
1644                 if ( $returnto == null ) {
1645                         $returnto = $wgRequest->getText( 'returnto' );
1646                 }
1647
1648                 if ( $returntoquery == null ) {
1649                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1650                 }
1651
1652                 if ( '' === $returnto ) {
1653                         $returnto = Title::newMainPage();
1654                 }
1655
1656                 if ( is_object( $returnto ) ) {
1657                         $titleObj = $returnto;
1658                 } else {
1659                         $titleObj = Title::newFromText( $returnto );
1660                 }
1661                 if ( !is_object( $titleObj ) ) {
1662                         $titleObj = Title::newMainPage();
1663                 }
1664
1665                 $this->addReturnTo( $titleObj, $returntoquery );
1666         }
1667
1668         /**
1669          * @return string The doctype, opening <html>, and head element.
1670          */
1671         public function headElement( Skin $sk ) {
1672                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1673                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1674                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgEnableScriptLoader, $wgHtml5;
1675
1676                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1677                 if ( $sk->commonPrintStylesheet() ) {
1678                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1679                 }
1680                 $sk->setupUserCss( $this );
1681
1682                 $ret = '';
1683
1684                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1685                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1686                 }
1687
1688                 if ( '' == $this->getHTMLTitle() ) {
1689                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1690                 }
1691
1692                 $dir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1693
1694                 if ( $wgHtml5 ) {
1695                         $ret .= "<!doctype html>\n";
1696                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1697                 } else {
1698                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1699                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1700                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1701                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1702                         }
1703                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1704                 }
1705
1706                 $ret .= "<head>\n\t<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n\t";
1707                 $ret .= implode( "\n", array(
1708                         $this->getHeadLinks(),
1709                         $this->buildCssLinks(),
1710                         $sk->getHeadScripts( $this ),
1711                         $this->getHeadItems(),
1712                 ));
1713                 if( $sk->usercss ){
1714                         $ret .= Html::inlineStyle( $sk->usercss );
1715                 }
1716
1717                 if( $wgEnableScriptLoader )
1718                         $ret .= $this->getScriptLoaderJs();
1719
1720                 if ($wgUseTrackbacks && $this->isArticleRelated())
1721                         $ret .= $this->getTitle()->trackbackRDF();
1722
1723                 $ret .= "</head>\n";
1724                 return $ret;
1725         }
1726
1727         protected function addDefaultMeta() {
1728                 global $wgVersion, $wgHtml5;
1729
1730                 static $called = false;
1731                 if ( $called ) {
1732                         # Don't run this twice
1733                         return;
1734                 }
1735                 $called = true;
1736
1737                 if ( !$wgHtml5 ) {
1738                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1739                 }
1740                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1741
1742                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1743                 if( $p !== 'index,follow' ) {
1744                         // http://www.robotstxt.org/wc/meta-user.html
1745                         // Only show if it's different from the default robots policy
1746                         $this->addMeta( 'robots', $p );
1747                 }
1748
1749                 if ( count( $this->mKeywords ) > 0 ) {
1750                         $strip = array(
1751                                 "/<.*?" . ">/" => '',
1752                                 "/_/" => ' '
1753                         );
1754                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1755                 }
1756         }
1757
1758         /**
1759          * @return string HTML tag links to be put in the header.
1760          */
1761         public function getHeadLinks() {
1762                 global $wgRequest, $wgFeed;
1763
1764                 // Ideally this should happen earlier, somewhere. :P
1765                 $this->addDefaultMeta();
1766
1767                 $tags = array();
1768
1769                 foreach ( $this->mMetatags as $tag ) {
1770                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1771                                 $a = 'http-equiv';
1772                                 $tag[0] = substr( $tag[0], 5 );
1773                         } else {
1774                                 $a = 'name';
1775                         }
1776                         $tags[] = Xml::element( 'meta',
1777                                 array(
1778                                         $a => $tag[0],
1779                                         'content' => $tag[1] ) );
1780                 }
1781                 foreach ( $this->mLinktags as $tag ) {
1782                         $tags[] = Xml::element( 'link', $tag );
1783                 }
1784
1785                 if( $wgFeed ) {
1786                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1787                                 # Use the page name for the title (accessed through $wgTitle since
1788                                 # there's no other way).  In principle, this could lead to issues
1789                                 # with having the same name for different feeds corresponding to
1790                                 # the same page, but we can't avoid that at this low a level.
1791
1792                                 $tags[] = $this->feedLink(
1793                                         $format,
1794                                         $link,
1795                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1796                         }
1797
1798                         # Recent changes feed should appear on every page (except recentchanges,
1799                         # that would be redundant). Put it after the per-page feed to avoid
1800                         # changing existing behavior. It's still available, probably via a
1801                         # menu in your browser. Some sites might have a different feed they'd
1802                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1803                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1804                         # If so, use it instead.
1805
1806                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses;
1807                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1808
1809                         if ( $wgOverrideSiteFeed ) {
1810                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1811                                         $tags[] = $this->feedLink (
1812                                                 $type,
1813                                                 htmlspecialchars( $feedUrl ),
1814                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1815                                 }
1816                         }
1817                         else if ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1818                                 foreach( $wgFeedClasses as $format => $class ) {
1819                                         $tags[] = $this->feedLink(
1820                                                 $format,
1821                                                 $rctitle->getLocalURL( "feed={$format}" ),
1822                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1823                                 }
1824                         }
1825                 }
1826
1827                 return implode( "\n\t", $tags ) . "\n";
1828         }
1829
1830         /**
1831          * Return URLs for each supported syndication format for this page.
1832          * @return array associating format keys with URLs
1833          */
1834         public function getSyndicationLinks() {
1835                 global $wgFeedClasses;
1836                 $links = array();
1837
1838                 if( $this->isSyndicated() ) {
1839                         if( is_string( $this->getFeedAppendQuery() ) ) {
1840                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1841                         } else {
1842                                 $appendQuery = "";
1843                         }
1844
1845                         foreach( $wgFeedClasses as $format => $class ) {
1846                                 $links[$format] = $this->getTitle()->getLocalUrl( "feed=$format{$appendQuery}" );
1847                         }
1848                 }
1849                 return $links;
1850         }
1851
1852         /**
1853          * Generate a <link rel/> for an RSS feed.
1854          */
1855         private function feedLink( $type, $url, $text ) {
1856                 return Xml::element( 'link', array(
1857                         'rel' => 'alternate',
1858                         'type' => "application/$type+xml",
1859                         'title' => $text,
1860                         'href' => $url ) );
1861         }
1862
1863         /**
1864          * Add a local or specified stylesheet, with the given media options.
1865          * Meant primarily for internal use...
1866          *
1867          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1868          * @param $conditional -- for IE conditional comments, specifying an IE version
1869          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1870          */
1871         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1872                 $options = array();
1873                 // In Opera, fullscreen mode is treated as projection mode, and it causes
1874                 // styles set for screen to not be loaded - thus breaking the page -  so
1875                 // we can just append projection to the media attribute when it's screen
1876                 // so the browser is happy and - with no side-effects on other browsers.
1877                 // Also - even though we expect the media type to be lowercase, but here
1878                 // we force it to lowercase to be safe.
1879                 if ( strtolower( $media ) == 'screen' )
1880                         $media .= ',projection';
1881                 if( $media )
1882                         $options['media'] = $media;
1883                 if( $condition )
1884                         $options['condition'] = $condition;
1885                 if( $dir )
1886                         $options['dir'] = $dir;
1887                 $this->styles[$style] = $options;
1888         }
1889
1890         /**
1891          * Adds inline CSS styles
1892          * @param $style_css Mixed: inline CSS
1893          */
1894         public function addInlineStyle( $style_css ){
1895                 $this->mScripts .= Html::inlineStyle( $style_css );
1896         }
1897
1898         /**
1899          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1900          * These will be applied to various media & IE conditionals.
1901          */
1902         public function buildCssLinks() {
1903                 $links = array();
1904                 foreach( $this->styles as $file => $options ) {
1905                         $link = $this->styleLink( $file, $options );
1906                         if( $link )
1907                                 $links[] = $link;
1908                 }
1909
1910                 return "\t" . implode( "\n\t", $links );
1911         }
1912
1913         protected function styleLink( $style, $options ) {
1914                 global $wgRequest;
1915
1916                 if( isset( $options['dir'] ) ) {
1917                         global $wgContLang;
1918                         $siteDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1919                         if( $siteDir != $options['dir'] )
1920                                 return '';
1921                 }
1922
1923                 if( isset( $options['media'] ) ) {
1924                         $media = $this->transformCssMedia( $options['media'] );
1925                         if( is_null( $media ) ) {
1926                                 return '';
1927                         }
1928                 } else {
1929                         $media = null;
1930                 }
1931
1932                 if( substr( $style, 0, 1 ) == '/' ||
1933                         substr( $style, 0, 5 ) == 'http:' ||
1934                         substr( $style, 0, 6 ) == 'https:' ) {
1935                         $url = $style;
1936                 } else {
1937                         global $wgStylePath, $wgStyleVersion;
1938                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1939                 }
1940
1941                 $link = Html::linkedStyle( $url, $media );
1942
1943                 if( isset( $options['condition'] ) ) {
1944                         $condition = htmlspecialchars( $options['condition'] );
1945                         $link = "<!--[if $condition]>$link<![endif]-->";
1946                 }
1947                 return $link;
1948         }
1949
1950         function transformCssMedia( $media ) {
1951                 global $wgRequest, $wgHandheldForIPhone;
1952
1953                 // Switch in on-screen display for media testing
1954                 $switches = array(
1955                         'printable' => 'print',
1956                         'handheld' => 'handheld',
1957                 );
1958                 foreach( $switches as $switch => $targetMedia ) {
1959                         if( $wgRequest->getBool( $switch ) ) {
1960                                 if( $media == $targetMedia ) {
1961                                         $media = '';
1962                                 } elseif( $media == 'screen' ) {
1963                                         return null;
1964                                 }
1965                         }
1966                 }
1967
1968                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1969                 if( $wgHandheldForIPhone ) {
1970                         $mediaAliases = array(
1971                                 'screen' => 'screen and (min-device-width: 481px)',
1972                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1973                         );
1974
1975                         if( isset( $mediaAliases[$media] ) ) {
1976                                 $media = $mediaAliases[$media];
1977                         }
1978                 }
1979
1980                 return $media;
1981         }
1982
1983         /**
1984          * Turn off regular page output and return an error reponse
1985          * for when rate limiting has triggered.
1986          */
1987         public function rateLimited() {
1988
1989                 $this->setPageTitle(wfMsg('actionthrottled'));
1990                 $this->setRobotPolicy( 'noindex,follow' );
1991                 $this->setArticleRelated( false );
1992                 $this->enableClientCache( false );
1993                 $this->mRedirect = '';
1994                 $this->clearHTML();
1995                 $this->setStatusCode(503);
1996                 $this->addWikiMsg( 'actionthrottledtext' );
1997
1998                 $this->returnToMain( null, $this->getTitle() );
1999         }
2000
2001         /**
2002          * Show an "add new section" link?
2003          *
2004          * @return bool
2005          */
2006         public function showNewSectionLink() {
2007                 return $this->mNewSectionLink;
2008         }
2009
2010         /**
2011         * Forcibly hide the new section link?
2012         *
2013         * @return bool
2014         */
2015         public function forceHideNewSectionLink() {
2016                 return $this->mHideNewSectionLink;
2017         }
2018
2019         /**
2020          * Show a warning about slave lag
2021          *
2022          * If the lag is higher than $wgSlaveLagCritical seconds,
2023          * then the warning is a bit more obvious. If the lag is
2024          * lower than $wgSlaveLagWarning, then no warning is shown.
2025          *
2026          * @param int $lag Slave lag
2027          */
2028         public function showLagWarning( $lag ) {
2029                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
2030                 if( $lag >= $wgSlaveLagWarning ) {
2031                         $message = $lag < $wgSlaveLagCritical
2032                                 ? 'lag-warn-normal'
2033                                 : 'lag-warn-high';
2034                         $warning = wfMsgExt( $message, 'parse', $lag );
2035                         $this->addHTML( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
2036                 }
2037         }
2038
2039         /**
2040          * Add a wikitext-formatted message to the output.
2041          * This is equivalent to:
2042          *
2043          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2044          */
2045         public function addWikiMsg( /*...*/ ) {
2046                 $args = func_get_args();
2047                 $name = array_shift( $args );
2048                 $this->addWikiMsgArray( $name, $args );
2049         }
2050
2051         /**
2052          * Add a wikitext-formatted message to the output.
2053          * Like addWikiMsg() except the parameters are taken as an array
2054          * instead of a variable argument list.
2055          *
2056          * $options is passed through to wfMsgExt(), see that function for details.
2057          */
2058         public function addWikiMsgArray( $name, $args, $options = array() ) {
2059                 $options[] = 'parse';
2060                 $text = wfMsgExt( $name, $options, $args );
2061                 $this->addHTML( $text );
2062         }
2063
2064         /**
2065          * This function takes a number of message/argument specifications, wraps them in
2066          * some overall structure, and then parses the result and adds it to the output.
2067          *
2068          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2069          * on. The subsequent arguments may either be strings, in which case they are the
2070          * message names, or arrays, in which case the first element is the message name,
2071          * and subsequent elements are the parameters to that message.
2072          *
2073          * The special named parameter 'options' in a message specification array is passed
2074          * through to the $options parameter of wfMsgExt().
2075          *
2076          * Don't use this for messages that are not in users interface language.
2077          *
2078          * For example:
2079          *
2080          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
2081          *
2082          * Is equivalent to:
2083          *
2084          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
2085          */
2086         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2087                 $msgSpecs = func_get_args();
2088                 array_shift( $msgSpecs );
2089                 $msgSpecs = array_values( $msgSpecs );
2090                 $s = $wrap;
2091                 foreach ( $msgSpecs as $n => $spec ) {
2092                         $options = array();
2093                         if ( is_array( $spec ) ) {
2094                                 $args = $spec;
2095                                 $name = array_shift( $args );
2096                                 if ( isset( $args['options'] ) ) {
2097                                         $options = $args['options'];
2098                                         unset( $args['options'] );
2099                                 }
2100                         }  else {
2101                                 $args = array();
2102                                 $name = $spec;
2103                         }
2104                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2105                 }
2106                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2107         }
2108 }