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(), $mCategories = array(), $mLanguageLinks = array();
  16
  17         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  18         var $mInlineMsg = array();
  19
  20         var $mTemplateIds = array();
  21
  22         var $mAllowUserJs;
  23         var $mSuppressQuickbar = false;
  24         var $mOnloadHandler = '';
  25         var $mDoNothing = false;
  26         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  27         var $mIsArticleRelated = true;
  28         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  29
  30         var $mFeedLinks = array();
  31
  32         var $mEnableClientCache = true;
  33         var $mArticleBodyOnly = false;
  34
  35         var $mNewSectionLink = false;
  36         var $mHideNewSectionLink = false;
  37         var $mNoGallery = false;
  38         var $mPageTitleActionText = '';
  39         var $mParseWarnings = array();
  40         var $mSquidMaxage = 0;
  41         var $mRevisionId = null;
  42         protected $mTitle = null;
  43
  44         /**
  45          * An array of stylesheet filenames (relative from skins path), with options
  46          * for CSS media, IE conditions, and RTL/LTR direction.
  47          * For internal use; add settings in the skin via $this->addStyle()
  48          */
  49         var $styles = array();
  50
  51         private $mIndexPolicy = 'index';
  52         private $mFollowPolicy = 'follow';
  53
  54         /**
  55          * Constructor
  56          * Initialise private variables
  57          */
  58         function __construct() {
  59                 global $wgAllowUserJs;
  60                 $this->mAllowUserJs = $wgAllowUserJs;
  61         }
  62
  63         public function redirect( $url, $responsecode = '302' ) {
  64                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  65                 $this->mRedirect = str_replace( "\n", '', $url );
  66                 $this->mRedirectCode = $responsecode;
  67         }
  68
  69         public function getRedirect() {
  70                 return $this->mRedirect;
  71         }
  72
  73         /**
  74          * Set the HTTP status code to send with the output.
  75          *
  76          * @param int $statusCode
  77          * @return nothing
  78          */
  79         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  80
  81         /**
  82          * Add a new <meta> tag
  83          * To add an http-equiv meta tag, precede the name with "http:"
  84          *
  85          * @param $name tag name
  86          * @param $val tag value
  87          */
  88         function addMeta( $name, $val ) {
  89                 array_push( $this->mMetatags, array( $name, $val ) );
  90         }
  91
  92         function addKeyword( $text ) {
  93                 if( is_array( $text )) {
  94                         $this->mKeywords = array_merge( $this->mKeywords, $text );
  95                 } else {
  96                         array_push( $this->mKeywords, $text );
  97                 }
  98         }
  99         function addScript( $script ) {
 100                 $this->mScripts .= $script . "\n";
 101         }
 102
 103         /**
 104          * Register and add a stylesheet from an extension directory.
 105          * @param $url String path to sheet.  Provide either a full url (beginning
 106          *             with 'http', etc) or a relative path from the document root
 107          *             (beginning with '/').  Otherwise it behaves identically to
 108          *             addStyle() and draws from the /skins folder.
 109          */
 110         public function addExtensionStyle( $url ) {
 111                 array_push( $this->mExtStyles, $url );
 112         }
 113
 114         /**
 115          * Add a JavaScript file out of skins/common, or a given relative path.
 116          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 117          */
 118         function addScriptFile( $file ) {
 119                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
 120                 if( substr( $file, 0, 1 ) == '/' ) {
 121                         $path = $file;
 122                 } else {
 123                         $path =  "{$wgStylePath}/common/{$file}";
 124                 }
 125                 $this->addScript(
 126                         Xml::element( 'script',
 127                                 array(
 128                                         'type' => $wgJsMimeType,
 129                                         'src' => "$path?$wgStyleVersion",
 130                                 ),
 131                                 '', false
 132                         )
 133                 );
 134         }
 135
 136         /**
 137          * Add a self-contained script tag with the given contents
 138          * @param string $script JavaScript text, no <script> tags
 139          */
 140         function addInlineScript( $script ) {
 141                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 142         }
 143
 144         /**
 145          * Get all registered JS and CSS tags for the header.
 146          */
 147         function getScript() {
 148                 return $this->mScripts . $this->getHeadItems();
 149         }
 150
 151         function getHeadItems() {
 152                 $s = '';
 153                 foreach ( $this->mHeadItems as $item ) {
 154                         $s .= $item;
 155                 }
 156                 return $s;
 157         }
 158
 159         function addHeadItem( $name, $value ) {
 160                 $this->mHeadItems[$name] = $value;
 161         }
 162
 163         function hasHeadItem( $name ) {
 164                 return isset( $this->mHeadItems[$name] );
 165         }
 166
 167         function setETag($tag) { $this->mETag = $tag; }
 168         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 169         function getArticleBodyOnly() { return $this->mArticleBodyOnly; }
 170
 171         function addLink( $linkarr ) {
 172                 # $linkarr should be an associative array of attributes. We'll escape on output.
 173                 array_push( $this->mLinktags, $linkarr );
 174         }
 175
 176         # Get all links added by extensions
 177         function getExtStyle() {
 178                 return $this->mExtStyles;
 179         }
 180
 181         function addMetadataLink( $linkarr ) {
 182                 # note: buggy CC software only reads first "meta" link
 183                 static $haveMeta = false;
 184                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 185                 $this->addLink( $linkarr );
 186                 $haveMeta = true;
 187         }
 188
 189         /**
 190          * checkLastModified tells the client to use the client-cached page if
 191          * possible. If sucessful, the OutputPage is disabled so that
 192          * any future call to OutputPage->output() have no effect.
 193          *
 194          * Side effect: sets mLastModified for Last-Modified header
 195          *
 196          * @return bool True iff cache-ok headers was sent.
 197          */
 198         function checkLastModified( $timestamp ) {
 199                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 200
 201                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 202                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 203                         return false;
 204                 }
 205                 if( !$wgCachePages ) {
 206                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 207                         return false;
 208                 }
 209                 if( $wgUser->getOption( 'nocache' ) ) {
 210                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 211                         return false;
 212                 }
 213
 214                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 215                 $modifiedTimes = array(
 216                         'page' => $timestamp,
 217                         'user' => $wgUser->getTouched(),
 218                         'epoch' => $wgCacheEpoch
 219                 );
 220                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 221
 222                 $maxModified = max( $modifiedTimes );
 223                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 224
 225                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 226                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 227                         return false;
 228                 }
 229
 230                 # Make debug info
 231                 $info = '';
 232                 foreach ( $modifiedTimes as $name => $value ) {
 233                         if ( $info !== '' ) {
 234                                 $info .= ', ';
 235                         }
 236                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 237                 }
 238
 239                 # IE sends sizes after the date like this:
 240                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 241                 # this breaks strtotime().
 242                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 243
 244                 wfSuppressWarnings(); // E_STRICT system time bitching
 245                 $clientHeaderTime = strtotime( $clientHeader );
 246                 wfRestoreWarnings();
 247                 if ( !$clientHeaderTime ) {
 248                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 249                         return false;
 250                 }
 251                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 252
 253                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 254                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 255                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 256                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 257                 if( $clientHeaderTime < $maxModified ) {
 258                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 259                         return false;
 260                 }
 261
 262                 # Not modified
 263                 # Give a 304 response code and disable body output
 264                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 265                 ini_set('zlib.output_compression', 0);
 266                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 267                 $this->sendCacheControl();
 268                 $this->disable();
 269
 270                 // Don't output a compressed blob when using ob_gzhandler;
 271                 // it's technically against HTTP spec and seems to confuse
 272                 // Firefox when the response gets split over two packets.
 273                 wfClearOutputBuffers();
 274
 275                 return true;
 276         }
 277
 278         function setPageTitleActionText( $text ) {
 279                 $this->mPageTitleActionText = $text;
 280         }
 281
 282         function getPageTitleActionText () {
 283                 if ( isset( $this->mPageTitleActionText ) ) {
 284                         return $this->mPageTitleActionText;
 285                 }
 286         }
 287
 288         /**
 289          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 290          *
 291          * @param $policy string The literal string to output as the contents of
 292          *   the meta tag.  Will be parsed according to the spec and output in
 293          *   standardized form.
 294          * @return null
 295          */
 296         public function setRobotPolicy( $policy ) {
 297                 $policy = Article::formatRobotPolicy( $policy );
 298
 299                 if( isset( $policy['index'] ) ){
 300                         $this->setIndexPolicy( $policy['index'] );
 301                 }
 302                 if( isset( $policy['follow'] ) ){
 303                         $this->setFollowPolicy( $policy['follow'] );
 304                 }
 305         }
 306
 307         /**
 308          * Set the index policy for the page, but leave the follow policy un-
 309          * touched.
 310          *
 311          * @param $policy string Either 'index' or 'noindex'.
 312          * @return null
 313          */
 314         public function setIndexPolicy( $policy ) {
 315                 $policy = trim( $policy );
 316                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 317                         $this->mIndexPolicy = $policy;
 318                 }
 319         }
 320
 321         /**
 322          * Set the follow policy for the page, but leave the index policy un-
 323          * touched.
 324          *
 325          * @param $policy string Either 'follow' or 'nofollow'.
 326          * @return null
 327          */
 328         public function setFollowPolicy( $policy ) {
 329                 $policy = trim( $policy );
 330                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 331                         $this->mFollowPolicy = $policy;
 332                 }
 333         }
 334
 335         /**
 336          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 337          */
 338         public function setHTMLTitle( $name ) {
 339                 $this->mHTMLtitle = $name;
 340         }
 341
 342         /**
 343          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 344          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 345          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 346          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 347          */
 348         public function setPageTitle( $name ) {
 349                 global $wgContLang;
 350                 $name = $wgContLang->convert( $name, true );
 351                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 352                 # but leave "<i>foobar</i>" alone
 353                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 354                 $this->mPagetitle = $nameWithTags;
 355
 356                 $taction =  $this->getPageTitleActionText();
 357                 if( !empty( $taction ) ) {
 358                         $name .= ' - '.$taction;
 359                 }
 360
 361                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 362                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 363         }
 364
 365         public function setTitle( $t ) {
 366                 $this->mTitle = $t;
 367         }
 368
 369         public function getTitle() {
 370                 if ( $this->mTitle instanceof Title ) {
 371                         return $this->mTitle;
 372                 }
 373                 else {
 374                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 375                         global $wgTitle;
 376                         return $wgTitle;
 377                 }
 378         }
 379
 380         public function getHTMLTitle() { return $this->mHTMLtitle; }
 381         public function getPageTitle() { return $this->mPagetitle; }
 382         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 383         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 384         public function getSubtitle() { return $this->mSubtitle; }
 385         public function isArticle() { return $this->mIsarticle; }
 386         public function setPrintable() { $this->mPrintable = true; }
 387         public function isPrintable() { return $this->mPrintable; }
 388         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 389         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 390         public function getOnloadHandler() { return $this->mOnloadHandler; }
 391         public function disable() { $this->mDoNothing = true; }
 392         public function isDisabled() { return $this->mDoNothing; }
 393
 394         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 395
 396         public function setFeedAppendQuery( $val ) {
 397                 global $wgFeedClasses;
 398
 399                 $this->mFeedLinks = array();
 400
 401                 foreach( $wgFeedClasses as $type => $class ) {
 402                         $query = "feed=$type&".$val;
 403                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 404                 }
 405         }
 406
 407         public function addFeedLink( $format, $href ) {
 408                 $this->mFeedLinks[$format] = $href;
 409         }
 410
 411         public function isSyndicated() { return count($this->mFeedLinks); }
 412
 413         public function setArticleRelated( $v ) {
 414                 $this->mIsArticleRelated = $v;
 415                 if ( !$v ) {
 416                         $this->mIsarticle = false;
 417                 }
 418         }
 419         public function setArticleFlag( $v ) {
 420                 $this->mIsarticle = $v;
 421                 if ( $v ) {
 422                         $this->mIsArticleRelated = $v;
 423                 }
 424         }
 425
 426         public function isArticleRelated() { return $this->mIsArticleRelated; }
 427
 428         public function getLanguageLinks() { return $this->mLanguageLinks; }
 429         public function addLanguageLinks($newLinkArray) {
 430                 $this->mLanguageLinks += $newLinkArray;
 431         }
 432         public function setLanguageLinks($newLinkArray) {
 433                 $this->mLanguageLinks = $newLinkArray;
 434         }
 435
 436         public function getCategoryLinks() {
 437                 return $this->mCategoryLinks;
 438         }
 439
 440         public function getCategories() {
 441                 return $this->mCategories;
 442         }
 443
 444         /**
 445          * Add an array of categories, with names in the keys
 446          */
 447         public function addCategoryLinks( $categories ) {
 448                 global $wgUser, $wgContLang;
 449
 450                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 451                         return;
 452                 }
 453
 454                 # Add the links to a LinkBatch
 455                 $arr = array( NS_CATEGORY => $categories );
 456                 $lb = new LinkBatch;
 457                 $lb->setArray( $arr );
 458
 459                 # Fetch existence plus the hiddencat property
 460                 $dbr = wfGetDB( DB_SLAVE );
 461                 $pageTable = $dbr->tableName( 'page' );
 462                 $where = $lb->constructSet( 'page', $dbr );
 463                 $propsTable = $dbr->tableName( 'page_props' );
 464                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 465                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 466                 $res = $dbr->query( $sql, __METHOD__ );
 467
 468                 # Add the results to the link cache
 469                 $lb->addResultToCache( LinkCache::singleton(), $res );
 470
 471                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 472                 $categories = array_combine( array_keys( $categories ),
 473                         array_fill( 0, count( $categories ), 'normal' ) );
 474
 475                 # Mark hidden categories
 476                 foreach ( $res as $row ) {
 477                         if ( isset( $row->pp_value ) ) {
 478                                 $categories[$row->page_title] = 'hidden';
 479                         }
 480                 }
 481
 482                 # Add the remaining categories to the skin
 483                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 484                         $sk = $wgUser->getSkin();
 485                         foreach ( $categories as $category => $type ) {
 486                                 $origcategory = $category;
 487                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 488                                 $wgContLang->findVariantLink( $category, $title, true );
 489                                 if ( $category != $origcategory )
 490                                         if ( array_key_exists( $category, $categories ) )
 491                                                 continue;
 492                                 $text = $wgContLang->convertHtml( $title->getText() );
 493                                 $this->mCategories[] = $title->getText();
 494                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 495                         }
 496                 }
 497         }
 498
 499         public function setCategoryLinks($categories) {
 500                 $this->mCategoryLinks = array();
 501                 $this->addCategoryLinks($categories);
 502         }
 503
 504         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 505         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 506
 507         public function disallowUserJs() { $this->mAllowUserJs = false; }
 508         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 509
 510         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 511         public function addHTML( $text ) { $this->mBodytext .= $text; }
 512         public function clearHTML() { $this->mBodytext = ''; }
 513         public function getHTML() { return $this->mBodytext; }
 514         public function debug( $text ) { $this->mDebugtext .= $text; }
 515
 516         /* @deprecated */
 517         public function setParserOptions( $options ) {
 518                 wfDeprecated( __METHOD__ );
 519                 return $this->parserOptions( $options );
 520         }
 521
 522         public function parserOptions( $options = null ) {
 523                 if ( !$this->mParserOptions ) {
 524                         $this->mParserOptions = new ParserOptions;
 525                 }
 526                 return wfSetVar( $this->mParserOptions, $options );
 527         }
 528
 529         /**
 530          * Set the revision ID which will be seen by the wiki text parser
 531          * for things such as embedded {{REVISIONID}} variable use.
 532          * @param mixed $revid an integer, or NULL
 533          * @return mixed previous value
 534          */
 535         public function setRevisionId( $revid ) {
 536                 $val = is_null( $revid ) ? null : intval( $revid );
 537                 return wfSetVar( $this->mRevisionId, $val );
 538         }
 539
 540         public function getRevisionId() {
 541                 return $this->mRevisionId;
 542         }
 543
 544         /**
 545          * Convert wikitext to HTML and add it to the buffer
 546          * Default assumes that the current page title will
 547          * be used.
 548          *
 549          * @param string $text
 550          * @param bool   $linestart
 551          */
 552         public function addWikiText( $text, $linestart = true ) {
 553                 $title = $this->getTitle(); // Work arround E_STRICT
 554                 $this->addWikiTextTitle( $text, $title, $linestart );
 555         }
 556
 557         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 558                 $this->addWikiTextTitle($text, $title, $linestart);
 559         }
 560
 561         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 562                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 563         }
 564
 565         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 566                 global $wgParser;
 567
 568                 wfProfileIn( __METHOD__ );
 569
 570                 wfIncrStats( 'pcache_not_possible' );
 571
 572                 $popts = $this->parserOptions();
 573                 $oldTidy = $popts->setTidy( $tidy );
 574
 575                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 576                         $linestart, true, $this->mRevisionId );
 577
 578                 $popts->setTidy( $oldTidy );
 579
 580                 $this->addParserOutput( $parserOutput );
 581
 582                 wfProfileOut( __METHOD__ );
 583         }
 584
 585         /**
 586          * @todo document
 587          * @param ParserOutput object &$parserOutput
 588          */
 589         public function addParserOutputNoText( &$parserOutput ) {
 590                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 591
 592                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 593                 $this->addCategoryLinks( $parserOutput->getCategories() );
 594                 $this->mNewSectionLink = $parserOutput->getNewSection();
 595                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 596
 597                 $this->mParseWarnings = $parserOutput->getWarnings();
 598                 if ( $parserOutput->getCacheTime() == -1 ) {
 599                         $this->enableClientCache( false );
 600                 }
 601                 $this->mNoGallery = $parserOutput->getNoGallery();
 602                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 603                 // Versioning...
 604                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 605                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 606                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 607                         } else {
 608                                 $this->mTemplateIds[$ns] = $dbks;
 609                         }
 610                 }
 611                 // Page title
 612                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 613                         $this->setPageTitle( $dt );
 614                 else if ( ( $title = $parserOutput->getTitleText() ) != '' )
 615                         $this->setPageTitle( $title );
 616
 617                 // Hooks registered in the object
 618                 global $wgParserOutputHooks;
 619                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 620                         list( $hookName, $data ) = $hookInfo;
 621                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 622                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 623                         }
 624                 }
 625
 626                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 627         }
 628
 629         /**
 630          * @todo document
 631          * @param ParserOutput &$parserOutput
 632          */
 633         function addParserOutput( &$parserOutput ) {
 634                 $this->addParserOutputNoText( $parserOutput );
 635                 $text = $parserOutput->getText();
 636                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 637                 $this->addHTML( $text );
 638         }
 639
 640         /**
 641          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 642          * Saves the text into the parser cache if possible.
 643          *
 644          * @param string  $text
 645          * @param Article $article
 646          * @param bool    $cache
 647          * @deprecated Use Article::outputWikitext
 648          */
 649         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 650                 global $wgParser;
 651
 652                 wfDeprecated( __METHOD__ );
 653
 654                 $popts = $this->parserOptions();
 655                 $popts->setTidy(true);
 656                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 657                         $popts, true, true, $this->mRevisionId );
 658                 $popts->setTidy(false);
 659                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 660                         $parserCache = ParserCache::singleton();
 661                         $parserCache->save( $parserOutput, $article, $popts);
 662                 }
 663
 664                 $this->addParserOutput( $parserOutput );
 665         }
 666
 667         /**
 668          * @deprecated use addWikiTextTidy()
 669          */
 670         public function addSecondaryWikiText( $text, $linestart = true ) {
 671                 wfDeprecated( __METHOD__ );
 672                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 673         }
 674
 675         /**
 676          * Add wikitext with tidy enabled
 677          */
 678         public function addWikiTextTidy(  $text, $linestart = true ) {
 679                 $title = $this->getTitle();
 680                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 681         }
 682
 683
 684         /**
 685          * Add the output of a QuickTemplate to the output buffer
 686          *
 687          * @param QuickTemplate $template
 688          */
 689         public function addTemplate( &$template ) {
 690                 ob_start();
 691                 $template->execute();
 692                 $this->addHTML( ob_get_contents() );
 693                 ob_end_clean();
 694         }
 695
 696         /**
 697          * Parse wikitext and return the HTML.
 698          *
 699          * @param string $text
 700          * @param bool   $linestart Is this the start of a line?
 701          * @param bool   $interface ??
 702          */
 703         public function parse( $text, $linestart = true, $interface = false ) {
 704                 global $wgParser;
 705                 if( is_null( $this->getTitle() ) ) {
 706                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 707                 }
 708                 $popts = $this->parserOptions();
 709                 if ( $interface) { $popts->setInterfaceMessage(true); }
 710                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 711                         $linestart, true, $this->mRevisionId );
 712                 if ( $interface) { $popts->setInterfaceMessage(false); }
 713                 return $parserOutput->getText();
 714         }
 715
 716         /** Parse wikitext, strip paragraphs, and return the HTML. */
 717         public function parseInline( $text, $linestart = true, $interface = false ) {
 718                 $parsed = $this->parse( $text, $linestart, $interface );
 719
 720                 $m = array();
 721                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 722                         $parsed = $m[1];
 723                 }
 724
 725                 return $parsed;
 726         }
 727
 728         /**
 729          * @param Article $article
 730          * @param User    $user
 731          *
 732          * @deprecated
 733          *
 734          * @return bool True if successful, else false.
 735          */
 736         public function tryParserCache( &$article ) {
 737                 wfDeprecated( __METHOD__ );
 738                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 739
 740                 if ($parserOutput !== false) {
 741                         $this->addParserOutput( $parserOutput );
 742                         return true;
 743                 } else {
 744                         return false;
 745                 }
 746         }
 747
 748         /**
 749          * @param int $maxage Maximum cache time on the Squid, in seconds.
 750          */
 751         public function setSquidMaxage( $maxage ) {
 752                 $this->mSquidMaxage = $maxage;
 753         }
 754
 755         /**
 756          * Use enableClientCache(false) to force it to send nocache headers
 757          * @param $state ??
 758          */
 759         public function enableClientCache( $state ) {
 760                 return wfSetVar( $this->mEnableClientCache, $state );
 761         }
 762
 763         function getCacheVaryCookies() {
 764                 global $wgCookiePrefix, $wgCacheVaryCookies;
 765                 static $cookies;
 766                 if ( $cookies === null ) {
 767                         $cookies = array_merge(
 768                                 array(
 769                                         "{$wgCookiePrefix}Token",
 770                                         "{$wgCookiePrefix}LoggedOut",
 771                                         session_name()
 772                                 ),
 773                                 $wgCacheVaryCookies
 774                         );
 775                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 776                 }
 777                 return $cookies;
 778         }
 779
 780         function uncacheableBecauseRequestVars() {
 781                 global $wgRequest;
 782                 return  $wgRequest->getText('useskin', false) === false
 783                         && $wgRequest->getText('uselang', false) === false;
 784         }
 785
 786         /**
 787          * Check if the request has a cache-varying cookie header
 788          * If it does, it's very important that we don't allow public caching
 789          */
 790         function haveCacheVaryCookies() {
 791                 global $wgRequest;
 792                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 793                 if ( $cookieHeader === false ) {
 794                         return false;
 795                 }
 796                 $cvCookies = $this->getCacheVaryCookies();
 797                 foreach ( $cvCookies as $cookieName ) {
 798                         # Check for a simple string match, like the way squid does it
 799                         if ( strpos( $cookieHeader, $cookieName ) ) {
 800                                 wfDebug( __METHOD__.": found $cookieName\n" );
 801                                 return true;
 802                         }
 803                 }
 804                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 805                 return false;
 806         }
 807
 808         /** Get a complete X-Vary-Options header */
 809         public function getXVO() {
 810                 $cvCookies = $this->getCacheVaryCookies();
 811                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 812                 $first = true;
 813                 foreach ( $cvCookies as $cookieName ) {
 814                         if ( $first ) {
 815                                 $first = false;
 816                         } else {
 817                                 $xvo .= ';';
 818                         }
 819                         $xvo .= 'string-contains=' . $cookieName;
 820                 }
 821                 return $xvo;
 822         }
 823
 824         public function sendCacheControl() {
 825                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 826
 827                 $response = $wgRequest->response();
 828                 if ($wgUseETag && $this->mETag)
 829                         $response->header("ETag: $this->mETag");
 830
 831                 # don't serve compressed data to clients who can't handle it
 832                 # maintain different caches for logged-in users and non-logged in ones
 833                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 834
 835                 if ( $wgUseXVO ) {
 836                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 837                         $response->header( $this->getXVO() );
 838                 }
 839
 840                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 841                         if( $wgUseSquid && session_id() == '' &&
 842                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 843                         {
 844                                 if ( $wgUseESI ) {
 845                                         # We'll purge the proxy cache explicitly, but require end user agents
 846                                         # to revalidate against the proxy on each visit.
 847                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 848                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 849                                         # start with a shorter timeout for initial testing
 850                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 851                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 852                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 853                                 } else {
 854                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 855                                         # to revalidate against the proxy on each visit.
 856                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 857                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 858                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 859                                         # start with a shorter timeout for initial testing
 860                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 861                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 862                                 }
 863                         } else {
 864                                 # We do want clients to cache if they can, but they *must* check for updates
 865                                 # on revisiting the page.
 866                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 867                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 868                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 869                         }
 870                         if($this->mLastModified) {
 871                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 872                         }
 873                 } else {
 874                         wfDebug( __METHOD__ . ": no caching **\n", false );
 875
 876                         # In general, the absence of a last modified header should be enough to prevent
 877                         # the client from using its cache. We send a few other things just to make sure.
 878                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 879                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 880                         $response->header( 'Pragma: no-cache' );
 881                 }
 882                 wfRunHooks('CacheHeadersAfterSet', array( $this ) );
 883         }
 884
 885         /**
 886          * Finally, all the text has been munged and accumulated into
 887          * the object, let's actually output it:
 888          */
 889         public function output() {
 890                 global $wgUser, $wgOutputEncoding, $wgRequest;
 891                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 892                 global $wgUseAjax, $wgAjaxWatch;
 893                 global $wgEnableMWSuggest, $wgUniversalEditButton;
 894                 global $wgArticle;
 895
 896                 if( $this->mDoNothing ){
 897                         return;
 898                 }
 899                 wfProfileIn( __METHOD__ );
 900                 if ( '' != $this->mRedirect ) {
 901                         # Standards require redirect URLs to be absolute
 902                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
 903                         if( $this->mRedirectCode == '301') {
 904                                 if( !$wgDebugRedirects ) {
 905                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 906                                 }
 907                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 908                         }
 909                         $this->sendCacheControl();
 910
 911                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 912                         if( $wgDebugRedirects ) {
 913                                 $url = htmlspecialchars( $this->mRedirect );
 914                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 915                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 916                                 print "</body>\n</html>\n";
 917                         } else {
 918                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 919                         }
 920                         wfProfileOut( __METHOD__ );
 921                         return;
 922                 }
 923                 elseif ( $this->mStatusCode )
 924                 {
 925                         $statusMessage = array(
 926                                 100 => 'Continue',
 927                                 101 => 'Switching Protocols',
 928                                 102 => 'Processing',
 929                                 200 => 'OK',
 930                                 201 => 'Created',
 931                                 202 => 'Accepted',
 932                                 203 => 'Non-Authoritative Information',
 933                                 204 => 'No Content',
 934                                 205 => 'Reset Content',
 935                                 206 => 'Partial Content',
 936                                 207 => 'Multi-Status',
 937                                 300 => 'Multiple Choices',
 938                                 301 => 'Moved Permanently',
 939                                 302 => 'Found',
 940                                 303 => 'See Other',
 941                                 304 => 'Not Modified',
 942                                 305 => 'Use Proxy',
 943                                 307 => 'Temporary Redirect',
 944                                 400 => 'Bad Request',
 945                                 401 => 'Unauthorized',
 946                                 402 => 'Payment Required',
 947                                 403 => 'Forbidden',
 948                                 404 => 'Not Found',
 949                                 405 => 'Method Not Allowed',
 950                                 406 => 'Not Acceptable',
 951                                 407 => 'Proxy Authentication Required',
 952                                 408 => 'Request Timeout',
 953                                 409 => 'Conflict',
 954                                 410 => 'Gone',
 955                                 411 => 'Length Required',
 956                                 412 => 'Precondition Failed',
 957                                 413 => 'Request Entity Too Large',
 958                                 414 => 'Request-URI Too Large',
 959                                 415 => 'Unsupported Media Type',
 960                                 416 => 'Request Range Not Satisfiable',
 961                                 417 => 'Expectation Failed',
 962                                 422 => 'Unprocessable Entity',
 963                                 423 => 'Locked',
 964                                 424 => 'Failed Dependency',
 965                                 500 => 'Internal Server Error',
 966                                 501 => 'Not Implemented',
 967                                 502 => 'Bad Gateway',
 968                                 503 => 'Service Unavailable',
 969                                 504 => 'Gateway Timeout',
 970                                 505 => 'HTTP Version Not Supported',
 971                                 507 => 'Insufficient Storage'
 972                         );
 973
 974                         if ( $statusMessage[$this->mStatusCode] )
 975                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 976                 }
 977
 978                 $sk = $wgUser->getSkin();
 979
 980                 if ( $wgUseAjax ) {
 981                         $this->addScriptFile( 'ajax.js' );
 982
 983                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 984
 985                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 986                                 $this->addScriptFile( 'ajaxwatch.js' );
 987                         }
 988
 989                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
 990                                 $this->addScriptFile( 'mwsuggest.js' );
 991                         }
 992                 }
 993
 994                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
 995                         $this->addScriptFile( 'rightclickedit.js' );
 996                 }
 997
 998                 if( $wgUniversalEditButton ) {
 999                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1000                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1001                                 // Original UniversalEditButton
1002                                 $msg = wfMsg('edit');
1003                                 $this->addLink( array(
1004                                         'rel' => 'alternate',
1005                                         'type' => 'application/x-wiki',
1006                                         'title' => $msg,
1007                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1008                                 ) );
1009                                 // Alternate edit link
1010                                 $this->addLink( array(
1011                                         'rel' => 'edit',
1012                                         'title' => $msg,
1013                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1014                                 ) );
1015                         }
1016                 }
1017
1018                 # Buffer output; final headers may depend on later processing
1019                 ob_start();
1020
1021                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1022                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1023
1024                 if ($this->mArticleBodyOnly) {
1025                         $this->out($this->mBodytext);
1026                 } else {
1027                         // Hook that allows last minute changes to the output page, e.g.
1028                         // adding of CSS or Javascript by extensions.
1029                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1030
1031                         wfProfileIn( 'Output-skin' );
1032                         $sk->outputPage( $this );
1033                         wfProfileOut( 'Output-skin' );
1034                 }
1035
1036                 $this->sendCacheControl();
1037                 ob_end_flush();
1038                 wfProfileOut( __METHOD__ );
1039         }
1040
1041         /**
1042          * Actually output something with print(). Performs an iconv to the
1043          * output encoding, if needed.
1044          * @param string $ins The string to output
1045          */
1046         public function out( $ins ) {
1047                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1048                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1049                         $outs = $ins;
1050                 } else {
1051                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1052                         if ( false === $outs ) { $outs = $ins; }
1053                 }
1054                 print $outs;
1055         }
1056
1057         /**
1058          * @todo document
1059          */
1060         public static function setEncodings() {
1061                 global $wgInputEncoding, $wgOutputEncoding;
1062                 global $wgContLang;
1063
1064                 $wgInputEncoding = strtolower( $wgInputEncoding );
1065
1066                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1067                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1068                         return;
1069                 }
1070                 $wgOutputEncoding = $wgInputEncoding;
1071         }
1072
1073         /**
1074          * Deprecated, use wfReportTime() instead.
1075          * @return string
1076          * @deprecated
1077          */
1078         public function reportTime() {
1079                 wfDeprecated( __METHOD__ );
1080                 $time = wfReportTime();
1081                 return $time;
1082         }
1083
1084         /**
1085          * Produce a "user is blocked" page.
1086          *
1087          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1088          * @return nothing
1089          */
1090         function blockedPage( $return = true ) {
1091                 global $wgUser, $wgContLang, $wgLang;
1092
1093                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1094                 $this->setRobotPolicy( 'noindex,nofollow' );
1095                 $this->setArticleRelated( false );
1096
1097                 $name = User::whoIs( $wgUser->blockedBy() );
1098                 $reason = $wgUser->blockedFor();
1099                 if( $reason == '' ) {
1100                         $reason = wfMsg( 'blockednoreason' );
1101                 }
1102                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1103                 $ip = wfGetIP();
1104
1105                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1106
1107                 $blockid = $wgUser->mBlock->mId;
1108
1109                 $blockExpiry = $wgUser->mBlock->mExpiry;
1110                 if ( $blockExpiry == 'infinity' ) {
1111                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1112                         // Search for localization in 'ipboptions'
1113                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1114                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1115                                 if ( strpos( $option, ":" ) === false )
1116                                         continue;
1117                                 list( $show, $value ) = explode( ":", $option );
1118                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1119                                         $blockExpiry = $show;
1120                                         break;
1121                                 }
1122                         }
1123                 } else {
1124                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1125                 }
1126
1127                 if ( $wgUser->mBlock->mAuto ) {
1128                         $msg = 'autoblockedtext';
1129                 } else {
1130                         $msg = 'blockedtext';
1131                 }
1132
1133                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1134                  * This could be a username, an ip range, or a single ip. */
1135                 $intended = $wgUser->mBlock->mAddress;
1136
1137                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1138
1139                 # Don't auto-return to special pages
1140                 if( $return ) {
1141                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1142                         $this->returnToMain( null, $return );
1143                 }
1144         }
1145
1146         /**
1147          * Output a standard error page
1148          *
1149          * @param string $title Message key for page title
1150          * @param string $msg Message key for page text
1151          * @param array $params Message parameters
1152          */
1153         public function showErrorPage( $title, $msg, $params = array() ) {
1154                 if ( $this->getTitle() ) {
1155                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1156                 }
1157                 $this->setPageTitle( wfMsg( $title ) );
1158                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1159                 $this->setRobotPolicy( 'noindex,nofollow' );
1160                 $this->setArticleRelated( false );
1161                 $this->enableClientCache( false );
1162                 $this->mRedirect = '';
1163                 $this->mBodytext = '';
1164
1165                 array_unshift( $params, 'parse' );
1166                 array_unshift( $params, $msg );
1167                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1168
1169                 $this->returnToMain();
1170         }
1171
1172         /**
1173          * Output a standard permission error page
1174          *
1175          * @param array $errors Error message keys
1176          */
1177         public function showPermissionsErrorPage( $errors, $action = null )
1178         {
1179                 $this->mDebugtext .= 'Original title: ' .
1180                 $this->getTitle()->getPrefixedText() . "\n";
1181                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1182                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1183                 $this->setRobotPolicy( 'noindex,nofollow' );
1184                 $this->setArticleRelated( false );
1185                 $this->enableClientCache( false );
1186                 $this->mRedirect = '';
1187                 $this->mBodytext = '';
1188                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1189         }
1190
1191         /** @deprecated */
1192         public function errorpage( $title, $msg ) {
1193                 wfDeprecated( __METHOD__ );
1194                 throw new ErrorPageError( $title, $msg );
1195         }
1196
1197         /**
1198          * Display an error page indicating that a given version of MediaWiki is
1199          * required to use it
1200          *
1201          * @param mixed $version The version of MediaWiki needed to use the page
1202          */
1203         public function versionRequired( $version ) {
1204                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1205                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1206                 $this->setRobotPolicy( 'noindex,nofollow' );
1207                 $this->setArticleRelated( false );
1208                 $this->mBodytext = '';
1209
1210                 $this->addWikiMsg( 'versionrequiredtext', $version );
1211                 $this->returnToMain();
1212         }
1213
1214         /**
1215          * Display an error page noting that a given permission bit is required.
1216          *
1217          * @param string $permission key required
1218          */
1219         public function permissionRequired( $permission ) {
1220                 global $wgLang;
1221
1222                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1223                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1224                 $this->setRobotPolicy( 'noindex,nofollow' );
1225                 $this->setArticleRelated( false );
1226                 $this->mBodytext = '';
1227
1228                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1229                         User::getGroupsWithPermission( $permission ) );
1230                 if( $groups ) {
1231                         $this->addWikiMsg( 'badaccess-groups',
1232                                 $wgLang->commaList( $groups ),
1233                                 count( $groups) );
1234                 } else {
1235                         $this->addWikiMsg( 'badaccess-group0' );
1236                 }
1237                 $this->returnToMain();
1238         }
1239
1240         /**
1241          * Use permissionRequired.
1242          * @deprecated
1243          */
1244         public function sysopRequired() {
1245                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1246         }
1247
1248         /**
1249          * Use permissionRequired.
1250          * @deprecated
1251          */
1252         public function developerRequired() {
1253                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1254         }
1255
1256         /**
1257          * Produce the stock "please login to use the wiki" page
1258          */
1259         public function loginToUse() {
1260                 global $wgUser, $wgContLang;
1261
1262                 if( $wgUser->isLoggedIn() ) {
1263                         $this->permissionRequired( 'read' );
1264                         return;
1265                 }
1266
1267                 $skin = $wgUser->getSkin();
1268
1269                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1270                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1271                 $this->setRobotPolicy( 'noindex,nofollow' );
1272                 $this->setArticleFlag( false );
1273
1274                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1275                 $loginLink = $skin->link(
1276                         $loginTitle,
1277                         wfMsgHtml( 'loginreqlink' ),
1278                         array(),
1279                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1280                         array( 'known', 'noclasses' )
1281                 );
1282                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1283                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1284
1285                 # Don't return to the main page if the user can't read it
1286                 # otherwise we'll end up in a pointless loop
1287                 $mainPage = Title::newMainPage();
1288                 if( $mainPage->userCanRead() )
1289                         $this->returnToMain( null, $mainPage );
1290         }
1291
1292         /** @deprecated */
1293         public function databaseError( $fname, $sql, $error, $errno ) {
1294                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1295         }
1296
1297         /**
1298          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1299          * @return string The wikitext error-messages, formatted into a list.
1300          */
1301         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1302                 if ($action == null) {
1303                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1304                 } else {
1305                         global $wgLang;
1306                         $action_desc = wfMsgNoTrans( "action-$action" );
1307                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1308                 }
1309
1310                 if (count( $errors ) > 1) {
1311                         $text .= '<ul class="permissions-errors">' . "\n";
1312
1313                         foreach( $errors as $error )
1314                         {
1315                                 $text .= '<li>';
1316                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1317                                 $text .= "</li>\n";
1318                         }
1319                         $text .= '</ul>';
1320                 } else {
1321                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1322                 }
1323
1324                 return $text;
1325         }
1326
1327         /**
1328          * Display a page stating that the Wiki is in read-only mode,
1329          * and optionally show the source of the page that the user
1330          * was trying to edit.  Should only be called (for this
1331          * purpose) after wfReadOnly() has returned true.
1332          *
1333          * For historical reasons, this function is _also_ used to
1334          * show the error message when a user tries to edit a page
1335          * they are not allowed to edit.  (Unless it's because they're
1336          * blocked, then we show blockedPage() instead.)  In this
1337          * case, the second parameter should be set to true and a list
1338          * of reasons supplied as the third parameter.
1339          *
1340          * @todo Needs to be split into multiple functions.
1341          *
1342          * @param string $source    Source code to show (or null).
1343          * @param bool   $protected Is this a permissions error?
1344          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1345          */
1346         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1347                 global $wgUser;
1348                 $skin = $wgUser->getSkin();
1349
1350                 $this->setRobotPolicy( 'noindex,nofollow' );
1351                 $this->setArticleRelated( false );
1352
1353                 // If no reason is given, just supply a default "I can't let you do
1354                 // that, Dave" message.  Should only occur if called by legacy code.
1355                 if ( $protected && empty($reasons) ) {
1356                         $reasons[] = array( 'badaccess-group0' );
1357                 }
1358
1359                 if ( !empty($reasons) ) {
1360                         // Permissions error
1361                         if( $source ) {
1362                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1363                                 $this->setSubtitle(
1364                                         wfMsg(
1365                                                 'viewsourcefor',
1366                                                 $skin->link(
1367                                                         $this->getTitle(),
1368                                                         null,
1369                                                         array(),
1370                                                         array(),
1371                                                         array( 'known', 'noclasses' )
1372                                                 )
1373                                         )
1374                                 );
1375                         } else {
1376                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1377                         }
1378                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1379                 } else {
1380                         // Wiki is read only
1381                         $this->setPageTitle( wfMsg( 'readonly' ) );
1382                         $reason = wfReadOnlyReason();
1383                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1384                 }
1385
1386                 // Show source, if supplied
1387                 if( is_string( $source ) ) {
1388                         $this->addWikiMsg( 'viewsourcetext' );
1389
1390                         $params = array(
1391                                 'id'   => 'wpTextbox1',
1392                                 'name' => 'wpTextbox1',
1393                                 'cols' => $wgUser->getOption( 'cols' ),
1394                                 'rows' => $wgUser->getOption( 'rows' ),
1395                                 'readonly' => 'readonly'
1396                         );
1397                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1398
1399                         // Show templates used by this article
1400                         $skin = $wgUser->getSkin();
1401                         $article = new Article( $this->getTitle() );
1402                         $this->addHTML( "<div class='templatesUsed'>
1403 {$skin->formatTemplates( $article->getUsedTemplates() )}
1404 </div>
1405 " );
1406                 }
1407
1408                 # If the title doesn't exist, it's fairly pointless to print a return
1409                 # link to it.  After all, you just tried editing it and couldn't, so
1410                 # what's there to do there?
1411                 if( $this->getTitle()->exists() ) {
1412                         $this->returnToMain( null, $this->getTitle() );
1413                 }
1414         }
1415
1416         /** @deprecated */
1417         public function fatalError( $message ) {
1418                 wfDeprecated( __METHOD__ );
1419                 throw new FatalError( $message );
1420         }
1421
1422         /** @deprecated */
1423         public function unexpectedValueError( $name, $val ) {
1424                 wfDeprecated( __METHOD__ );
1425                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1426         }
1427
1428         /** @deprecated */
1429         public function fileCopyError( $old, $new ) {
1430                 wfDeprecated( __METHOD__ );
1431                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1432         }
1433
1434         /** @deprecated */
1435         public function fileRenameError( $old, $new ) {
1436                 wfDeprecated( __METHOD__ );
1437                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1438         }
1439
1440         /** @deprecated */
1441         public function fileDeleteError( $name ) {
1442                 wfDeprecated( __METHOD__ );
1443                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1444         }
1445
1446         /** @deprecated */
1447         public function fileNotFoundError( $name ) {
1448                 wfDeprecated( __METHOD__ );
1449                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1450         }
1451
1452         public function showFatalError( $message ) {
1453                 $this->setPageTitle( wfMsg( "internalerror" ) );
1454                 $this->setRobotPolicy( "noindex,nofollow" );
1455                 $this->setArticleRelated( false );
1456                 $this->enableClientCache( false );
1457                 $this->mRedirect = '';
1458                 $this->mBodytext = $message;
1459         }
1460
1461         public function showUnexpectedValueError( $name, $val ) {
1462                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1463         }
1464
1465         public function showFileCopyError( $old, $new ) {
1466                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1467         }
1468
1469         public function showFileRenameError( $old, $new ) {
1470                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1471         }
1472
1473         public function showFileDeleteError( $name ) {
1474                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1475         }
1476
1477         public function showFileNotFoundError( $name ) {
1478                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1479         }
1480
1481         /**
1482          * Add a "return to" link pointing to a specified title
1483          *
1484          * @param Title $title Title to link
1485          * @param string $query Query string
1486          */
1487         public function addReturnTo( $title, $query = array() ) {
1488                 global $wgUser;
1489                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1490                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1491                         $title, null, array(), $query ) );
1492                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1493         }
1494
1495         /**
1496          * Add a "return to" link pointing to a specified title,
1497          * or the title indicated in the request, or else the main page
1498          *
1499          * @param null $unused No longer used
1500          * @param Title $returnto Title to return to
1501          */
1502         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1503                 global $wgRequest;
1504
1505                 if ( $returnto == null ) {
1506                         $returnto = $wgRequest->getText( 'returnto' );
1507                 }
1508
1509                 if ( $returntoquery == null ) {
1510                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1511                 }
1512
1513                 if ( '' === $returnto ) {
1514                         $returnto = Title::newMainPage();
1515                 }
1516
1517                 if ( is_object( $returnto ) ) {
1518                         $titleObj = $returnto;
1519                 } else {
1520                         $titleObj = Title::newFromText( $returnto );
1521                 }
1522                 if ( !is_object( $titleObj ) ) {
1523                         $titleObj = Title::newMainPage();
1524                 }
1525
1526                 $this->addReturnTo( $titleObj, $returntoquery );
1527         }
1528
1529         /**
1530          * @return string The doctype, opening <html>, and head element.
1531          *
1532          * @param $sk Skin The given Skin
1533          */
1534         public function headElement( Skin $sk, $includeStyle = true ) {
1535                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1536                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces, $wgHtml5Version;
1537                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgHtml5;
1538
1539                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1540                 if ( $sk->commonPrintStylesheet() ) {
1541                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1542                 }
1543                 $sk->setupUserCss( $this );
1544
1545                 $ret = '';
1546
1547                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1548                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1549                 }
1550
1551                 if ( '' == $this->getHTMLTitle() ) {
1552                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1553                 }
1554
1555                 $dir = $wgContLang->getDir();
1556
1557                 if ( $wgHtml5 ) {
1558                         $ret .= "<!DOCTYPE html>\n";
1559                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\" ";
1560                         if ($wgHtml5Version) $ret .= " version=\"$wgHtml5Version\" ";
1561                         $ret .= ">\n";
1562                 } else {
1563                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1564                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1565                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1566                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1567                         }
1568                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1569                 }
1570
1571                 $ret .= "<head>\n";
1572                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1573                 $ret .= implode( "\n", array(
1574                         $this->getHeadLinks(),
1575                         $this->buildCssLinks(),
1576                         $this->getHeadScripts( $sk ),
1577                         $this->getHeadItems(),
1578                 ));
1579                 if( $sk->usercss ){
1580                         $ret .= Html::inlineStyle( $sk->usercss );
1581                 }
1582
1583                 if ($wgUseTrackbacks && $this->isArticleRelated())
1584                         $ret .= $this->getTitle()->trackbackRDF();
1585
1586                 $ret .= "</head>\n";
1587                 return $ret;
1588         }
1589
1590         /*
1591          * gets the global variables and mScripts
1592          *
1593          * also adds userjs to the end if enabled:
1594         */
1595         function getHeadScripts( Skin $sk ) {
1596                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1597                 global $wgStylePath, $wgStyleVersion;
1598
1599                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1600                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
1601
1602                 //add site JS if enabled:
1603                 if( $wgUseSiteJs ) {
1604                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
1605                         $this->addScriptFile(  Skin::makeUrl( '-',
1606                                         "action=raw$jsCache&gen=js&useskin=" .
1607                                         urlencode( $sk->getSkinName() )
1608                                         )
1609                                 );
1610                 }
1611
1612                 //add user js if enabled:
1613                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
1614                         $action = $wgRequest->getVal( 'action', 'view' );
1615                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
1616                                 # XXX: additional security check/prompt?
1617                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
1618                         } else {
1619                                 $userpage = $wgUser->getUserPage();
1620                                 $userjs = Skin::makeUrl(
1621                                         $userpage->getPrefixedText() . '/' . $sk->getSkinName() . '.js',
1622                                         'action=raw&ctype=' . $wgJsMimeType );
1623                                 $this->addScriptFile( $userjs );
1624                         }
1625                 }
1626
1627                 $scripts .= "\n" . $this->mScripts;
1628                 return $scripts;
1629         }
1630
1631         protected function addDefaultMeta() {
1632                 global $wgVersion, $wgHtml5;
1633
1634                 static $called = false;
1635                 if ( $called ) {
1636                         # Don't run this twice
1637                         return;
1638                 }
1639                 $called = true;
1640
1641                 if ( !$wgHtml5 ) {
1642                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1643                 }
1644                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1645
1646                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1647                 if( $p !== 'index,follow' ) {
1648                         // http://www.robotstxt.org/wc/meta-user.html
1649                         // Only show if it's different from the default robots policy
1650                         $this->addMeta( 'robots', $p );
1651                 }
1652
1653                 if ( count( $this->mKeywords ) > 0 ) {
1654                         $strip = array(
1655                                 "/<.*?" . ">/" => '',
1656                                 "/_/" => ' '
1657                         );
1658                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1659                 }
1660         }
1661
1662         /**
1663          * @return string HTML tag links to be put in the header.
1664          */
1665         public function getHeadLinks() {
1666                 global $wgRequest, $wgFeed;
1667
1668                 // Ideally this should happen earlier, somewhere. :P
1669                 $this->addDefaultMeta();
1670
1671                 $tags = array();
1672
1673                 foreach ( $this->mMetatags as $tag ) {
1674                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1675                                 $a = 'http-equiv';
1676                                 $tag[0] = substr( $tag[0], 5 );
1677                         } else {
1678                                 $a = 'name';
1679                         }
1680                         $tags[] = Html::element( 'meta',
1681                                 array(
1682                                         $a => $tag[0],
1683                                         'content' => $tag[1] ) );
1684                 }
1685                 foreach ( $this->mLinktags as $tag ) {
1686                         $tags[] = Html::element( 'link', $tag );
1687                 }
1688
1689                 if( $wgFeed ) {
1690                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1691                                 # Use the page name for the title (accessed through $wgTitle since
1692                                 # there's no other way).  In principle, this could lead to issues
1693                                 # with having the same name for different feeds corresponding to
1694                                 # the same page, but we can't avoid that at this low a level.
1695
1696                                 $tags[] = $this->feedLink(
1697                                         $format,
1698                                         $link,
1699                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1700                         }
1701
1702                         # Recent changes feed should appear on every page (except recentchanges,
1703                         # that would be redundant). Put it after the per-page feed to avoid
1704                         # changing existing behavior. It's still available, probably via a
1705                         # menu in your browser. Some sites might have a different feed they'd
1706                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1707                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1708                         # If so, use it instead.
1709
1710                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses;
1711                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1712
1713                         if ( $wgOverrideSiteFeed ) {
1714                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1715                                         $tags[] = $this->feedLink (
1716                                                 $type,
1717                                                 htmlspecialchars( $feedUrl ),
1718                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1719                                 }
1720                         }
1721                         else if ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1722                                 foreach( $wgFeedClasses as $format => $class ) {
1723                                         $tags[] = $this->feedLink(
1724                                                 $format,
1725                                                 $rctitle->getLocalURL( "feed={$format}" ),
1726                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1727                                 }
1728                         }
1729                 }
1730
1731                 return implode( "\n", $tags );
1732         }
1733
1734         /**
1735          * Return URLs for each supported syndication format for this page.
1736          * @return array associating format keys with URLs
1737          */
1738         public function getSyndicationLinks() {
1739                 return $this->mFeedLinks;
1740         }
1741
1742         /**
1743          * Generate a <link rel/> for an RSS feed.
1744          */
1745         private function feedLink( $type, $url, $text ) {
1746                 return Html::element( 'link', array(
1747                         'rel' => 'alternate',
1748                         'type' => "application/$type+xml",
1749                         'title' => $text,
1750                         'href' => $url ) );
1751         }
1752
1753         /**
1754          * Add a local or specified stylesheet, with the given media options.
1755          * Meant primarily for internal use...
1756          *
1757          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1758          * @param $conditional -- for IE conditional comments, specifying an IE version
1759          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1760          */
1761         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1762                 $options = array();
1763                 // Even though we expect the media type to be lowercase, but here we
1764                 // force it to lowercase to be safe.
1765                 if( $media )
1766                         $options['media'] = $media;
1767                 if( $condition )
1768                         $options['condition'] = $condition;
1769                 if( $dir )
1770                         $options['dir'] = $dir;
1771                 $this->styles[$style] = $options;
1772         }
1773
1774         /**
1775          * Adds inline CSS styles
1776          * @param $style_css Mixed: inline CSS
1777          */
1778         public function addInlineStyle( $style_css ){
1779                 $this->mScripts .= Html::inlineStyle( $style_css );
1780         }
1781
1782         /**
1783          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1784          * These will be applied to various media & IE conditionals.
1785          */
1786         public function buildCssLinks() {
1787                 $links = array();
1788                 foreach( $this->styles as $file => $options ) {
1789                         $link = $this->styleLink( $file, $options );
1790                         if( $link )
1791                                 $links[] = $link;
1792                 }
1793
1794                 return implode( "\n", $links );
1795         }
1796
1797         protected function styleLink( $style, $options ) {
1798                 global $wgRequest;
1799
1800                 if( isset( $options['dir'] ) ) {
1801                         global $wgContLang;
1802                         $siteDir = $wgContLang->getDir();
1803                         if( $siteDir != $options['dir'] )
1804                                 return '';
1805                 }
1806
1807                 if( isset( $options['media'] ) ) {
1808                         $media = $this->transformCssMedia( $options['media'] );
1809                         if( is_null( $media ) ) {
1810                                 return '';
1811                         }
1812                 } else {
1813                         $media = 'all';
1814                 }
1815
1816                 if( substr( $style, 0, 1 ) == '/' ||
1817                         substr( $style, 0, 5 ) == 'http:' ||
1818                         substr( $style, 0, 6 ) == 'https:' ) {
1819                         $url = $style;
1820                 } else {
1821                         global $wgStylePath, $wgStyleVersion;
1822                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1823                 }
1824
1825                 $link = Html::linkedStyle( $url, $media );
1826
1827                 if( isset( $options['condition'] ) ) {
1828                         $condition = htmlspecialchars( $options['condition'] );
1829                         $link = "<!--[if $condition]>$link<![endif]-->";
1830                 }
1831                 return $link;
1832         }
1833
1834         function transformCssMedia( $media ) {
1835                 global $wgRequest, $wgHandheldForIPhone;
1836
1837                 // Switch in on-screen display for media testing
1838                 $switches = array(
1839                         'printable' => 'print',
1840                         'handheld' => 'handheld',
1841                 );
1842                 foreach( $switches as $switch => $targetMedia ) {
1843                         if( $wgRequest->getBool( $switch ) ) {
1844                                 if( $media == $targetMedia ) {
1845                                         $media = '';
1846                                 } elseif( $media == 'screen' ) {
1847                                         return null;
1848                                 }
1849                         }
1850                 }
1851
1852                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1853                 if( $wgHandheldForIPhone ) {
1854                         $mediaAliases = array(
1855                                 'screen' => 'screen and (min-device-width: 481px)',
1856                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1857                         );
1858
1859                         if( isset( $mediaAliases[$media] ) ) {
1860                                 $media = $mediaAliases[$media];
1861                         }
1862                 }
1863
1864                 return $media;
1865         }
1866
1867         /**
1868          * Turn off regular page output and return an error reponse
1869          * for when rate limiting has triggered.
1870          */
1871         public function rateLimited() {
1872
1873                 $this->setPageTitle(wfMsg('actionthrottled'));
1874                 $this->setRobotPolicy( 'noindex,follow' );
1875                 $this->setArticleRelated( false );
1876                 $this->enableClientCache( false );
1877                 $this->mRedirect = '';
1878                 $this->clearHTML();
1879                 $this->setStatusCode(503);
1880                 $this->addWikiMsg( 'actionthrottledtext' );
1881
1882                 $this->returnToMain( null, $this->getTitle() );
1883         }
1884
1885         /**
1886          * Show an "add new section" link?
1887          *
1888          * @return bool
1889          */
1890         public function showNewSectionLink() {
1891                 return $this->mNewSectionLink;
1892         }
1893
1894         /**
1895         * Forcibly hide the new section link?
1896         *
1897         * @return bool
1898         */
1899         public function forceHideNewSectionLink() {
1900                 return $this->mHideNewSectionLink;
1901         }
1902
1903         /**
1904          * Show a warning about slave lag
1905          *
1906          * If the lag is higher than $wgSlaveLagCritical seconds,
1907          * then the warning is a bit more obvious. If the lag is
1908          * lower than $wgSlaveLagWarning, then no warning is shown.
1909          *
1910          * @param int $lag Slave lag
1911          */
1912         public function showLagWarning( $lag ) {
1913                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
1914                 if( $lag >= $wgSlaveLagWarning ) {
1915                         $message = $lag < $wgSlaveLagCritical
1916                                 ? 'lag-warn-normal'
1917                                 : 'lag-warn-high';
1918                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
1919                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
1920                 }
1921         }
1922
1923         /**
1924          * Add a wikitext-formatted message to the output.
1925          * This is equivalent to:
1926          *
1927          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
1928          */
1929         public function addWikiMsg( /*...*/ ) {
1930                 $args = func_get_args();
1931                 $name = array_shift( $args );
1932                 $this->addWikiMsgArray( $name, $args );
1933         }
1934
1935         /**
1936          * Add a wikitext-formatted message to the output.
1937          * Like addWikiMsg() except the parameters are taken as an array
1938          * instead of a variable argument list.
1939          *
1940          * $options is passed through to wfMsgExt(), see that function for details.
1941          */
1942         public function addWikiMsgArray( $name, $args, $options = array() ) {
1943                 $options[] = 'parse';
1944                 $text = wfMsgExt( $name, $options, $args );
1945                 $this->addHTML( $text );
1946         }
1947
1948         /**
1949          * This function takes a number of message/argument specifications, wraps them in
1950          * some overall structure, and then parses the result and adds it to the output.
1951          *
1952          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
1953          * on. The subsequent arguments may either be strings, in which case they are the
1954          * message names, or arrays, in which case the first element is the message name,
1955          * and subsequent elements are the parameters to that message.
1956          *
1957          * The special named parameter 'options' in a message specification array is passed
1958          * through to the $options parameter of wfMsgExt().
1959          *
1960          * Don't use this for messages that are not in users interface language.
1961          *
1962          * For example:
1963          *
1964          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
1965          *
1966          * Is equivalent to:
1967          *
1968          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
1969          */
1970         public function wrapWikiMsg( $wrap /*, ...*/ ) {
1971                 $msgSpecs = func_get_args();
1972                 array_shift( $msgSpecs );
1973                 $msgSpecs = array_values( $msgSpecs );
1974                 $s = $wrap;
1975                 foreach ( $msgSpecs as $n => $spec ) {
1976                         $options = array();
1977                         if ( is_array( $spec ) ) {
1978                                 $args = $spec;
1979                                 $name = array_shift( $args );
1980                                 if ( isset( $args['options'] ) ) {
1981                                         $options = $args['options'];
1982                                         unset( $args['options'] );
1983                                 }
1984                         }  else {
1985                                 $args = array();
1986                                 $name = $spec;
1987                         }
1988                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
1989                 }
1990                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
1991         }
1992 }