includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mLanguageLinks = array();
  16         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  17         var $mTemplateIds = array();
  18
  19         var $mAllowUserJs;
  20         var $mSuppressQuickbar = false;
  21         var $mOnloadHandler = '';
  22         var $mDoNothing = false;
  23         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  24         var $mIsArticleRelated = true;
  25         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  26         var $mShowFeedLinks = false;
  27         var $mFeedLinksAppendQuery = false;
  28         var $mEnableClientCache = true;
  29         var $mArticleBodyOnly = false;
  30
  31         var $mNewSectionLink = false;
  32         var $mHideNewSectionLink = false;
  33         var $mNoGallery = false;
  34         var $mPageTitleActionText = '';
  35         var $mParseWarnings = array();
  36         var $mSquidMaxage = 0;
  37         var $mRevisionId = null;
  38         protected $mTitle = null;
  39
  40         /**
  41          * An array of stylesheet filenames (relative from skins path), with options
  42          * for CSS media, IE conditions, and RTL/LTR direction.
  43          * For internal use; add settings in the skin via $this->addStyle()
  44          */
  45         var $styles = array();
  46
  47         private $mIndexPolicy = 'index';
  48         private $mFollowPolicy = 'follow';
  49
  50         /**
  51          * Constructor
  52          * Initialise private variables
  53          */
  54         function __construct() {
  55                 global $wgAllowUserJs;
  56                 $this->mAllowUserJs = $wgAllowUserJs;
  57         }
  58
  59         public function redirect( $url, $responsecode = '302' ) {
  60                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  61                 $this->mRedirect = str_replace( "\n", '', $url );
  62                 $this->mRedirectCode = $responsecode;
  63         }
  64
  65         public function getRedirect() {
  66                 return $this->mRedirect;
  67         }
  68
  69         /**
  70          * Set the HTTP status code to send with the output.
  71          *
  72          * @param int $statusCode
  73          * @return nothing
  74          */
  75         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  76
  77         /**
  78          * Add a new <meta> tag
  79          * To add an http-equiv meta tag, precede the name with "http:"
  80          *
  81          * @param $name tag name
  82          * @param $val tag value
  83          */
  84         function addMeta( $name, $val ) {
  85                 array_push( $this->mMetatags, array( $name, $val ) );
  86         }
  87
  88         function addKeyword( $text ) {
  89                 if( is_array( $text )) {
  90                         $this->mKeywords = array_merge( $this->mKeywords, $text );
  91                 }
  92                 else {
  93                         array_push( $this->mKeywords, $text );
  94                 }
  95         }
  96         function addScript( $script ) { $this->mScripts .= "\t\t" . $script . "\n"; }
  97
  98         function addExtensionStyle( $url ) {
  99                 $linkarr = array( 'rel' => 'stylesheet', 'href' => $url, 'type' => 'text/css' );
 100                 array_push( $this->mExtStyles, $linkarr );
 101         }
 102
 103         /**
 104          * Add a JavaScript file out of skins/common, or a given relative path.
 105          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 106          */
 107         function addScriptFile( $file ) {
 108                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
 109                 if( substr( $file, 0, 1 ) == '/' ) {
 110                         $path = $file;
 111                 } else {
 112                         $path =  "{$wgStylePath}/common/{$file}";
 113                 }
 114                 $this->addScript(
 115                         Xml::element( 'script',
 116                                 array(
 117                                         'type' => $wgJsMimeType,
 118                                         'src' => "$path?$wgStyleVersion",
 119                                 ),
 120                                 '', false
 121                         )
 122                 );
 123         }
 124
 125         /**
 126          * Add a self-contained script tag with the given contents
 127          * @param string $script JavaScript text, no <script> tags
 128          */
 129         function addInlineScript( $script ) {
 130                 global $wgJsMimeType;
 131                 $this->mScripts .= "\t\t<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n\t\t$script\n\t\t/*]]>*/</script>\n";
 132         }
 133
 134         function getScript() {
 135                 return $this->mScripts . $this->getHeadItems();
 136         }
 137
 138         function getHeadItems() {
 139                 $s = '';
 140                 foreach ( $this->mHeadItems as $item ) {
 141                         $s .= $item;
 142                 }
 143                 return $s;
 144         }
 145
 146         function addHeadItem( $name, $value ) {
 147                 $this->mHeadItems[$name] = $value;
 148         }
 149
 150         function hasHeadItem( $name ) {
 151                 return isset( $this->mHeadItems[$name] );
 152         }
 153
 154         function setETag($tag) { $this->mETag = $tag; }
 155         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 156         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 157
 158         function addLink( $linkarr ) {
 159                 # $linkarr should be an associative array of attributes. We'll escape on output.
 160                 array_push( $this->mLinktags, $linkarr );
 161         }
 162
 163         # Get all links added by extensions
 164         function getExtStyle() {
 165                 return $this->mExtStyles;
 166         }
 167
 168         function addMetadataLink( $linkarr ) {
 169                 # note: buggy CC software only reads first "meta" link
 170                 static $haveMeta = false;
 171                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 172                 $this->addLink( $linkarr );
 173                 $haveMeta = true;
 174         }
 175
 176         /**
 177          * checkLastModified tells the client to use the client-cached page if
 178          * possible. If sucessful, the OutputPage is disabled so that
 179          * any future call to OutputPage->output() have no effect.
 180          *
 181          * Side effect: sets mLastModified for Last-Modified header
 182          *
 183          * @return bool True iff cache-ok headers was sent.
 184          */
 185         function checkLastModified( $timestamp ) {
 186                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 187
 188                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 189                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 190                         return false;
 191                 }
 192                 if( !$wgCachePages ) {
 193                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 194                         return false;
 195                 }
 196                 if( $wgUser->getOption( 'nocache' ) ) {
 197                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 198                         return false;
 199                 }
 200
 201                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 202                 $modifiedTimes = array(
 203                         'page' => $timestamp,
 204                         'user' => $wgUser->getTouched(),
 205                         'epoch' => $wgCacheEpoch
 206                 );
 207                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 208
 209                 $maxModified = max( $modifiedTimes );
 210                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 211
 212                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 213                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 214                         return false;
 215                 }
 216
 217                 # Make debug info
 218                 $info = '';
 219                 foreach ( $modifiedTimes as $name => $value ) {
 220                         if ( $info !== '' ) {
 221                                 $info .= ', ';
 222                         }
 223                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 224                 }
 225
 226                 # IE sends sizes after the date like this:
 227                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 228                 # this breaks strtotime().
 229                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 230
 231                 wfSuppressWarnings(); // E_STRICT system time bitching
 232                 $clientHeaderTime = strtotime( $clientHeader );
 233                 wfRestoreWarnings();
 234                 if ( !$clientHeaderTime ) {
 235                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 236                         return false;
 237                 }
 238                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 239
 240                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 241                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 242                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 243                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 244                 if( $clientHeaderTime < $maxModified ) {
 245                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 246                         return false;
 247                 }
 248
 249                 # Not modified
 250                 # Give a 304 response code and disable body output
 251                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 252                 ini_set('zlib.output_compression', 0);
 253                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 254                 $this->sendCacheControl();
 255                 $this->disable();
 256
 257                 // Don't output a compressed blob when using ob_gzhandler;
 258                 // it's technically against HTTP spec and seems to confuse
 259                 // Firefox when the response gets split over two packets.
 260                 wfClearOutputBuffers();
 261
 262                 return true;
 263         }
 264
 265         function setPageTitleActionText( $text ) {
 266                 $this->mPageTitleActionText = $text;
 267         }
 268
 269         function getPageTitleActionText () {
 270                 if ( isset( $this->mPageTitleActionText ) ) {
 271                         return $this->mPageTitleActionText;
 272                 }
 273         }
 274
 275         /**
 276          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 277          *
 278          * @param $policy string The literal string to output as the contents of
 279          *   the meta tag.  Will be parsed according to the spec and output in
 280          *   standardized form.
 281          * @return null
 282          */
 283         public function setRobotPolicy( $policy ) {
 284                 $policy = explode( ',', $policy );
 285                 $policy = array_map( 'trim', $policy );
 286
 287                 # The default policy is follow, so if nothing is said explicitly, we
 288                 # do that.
 289                 if( in_array( 'nofollow', $policy ) ) {
 290                         $this->mFollowPolicy = 'nofollow';
 291                 } else {
 292                         $this->mFollowPolicy = 'follow';
 293                 }
 294
 295                 if( in_array( 'noindex', $policy ) ) {
 296                         $this->mIndexPolicy = 'noindex';
 297                 } else {
 298                         $this->mIndexPolicy = 'index';
 299                 }
 300         }
 301
 302         /**
 303          * Set the index policy for the page, but leave the follow policy un-
 304          * touched.
 305          *
 306          * @param $policy string Either 'index' or 'noindex'.
 307          * @return null
 308          */
 309         public function setIndexPolicy( $policy ) {
 310                 $policy = trim( $policy );
 311                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 312                         $this->mIndexPolicy = $policy;
 313                 }
 314         }
 315
 316         /**
 317          * Set the follow policy for the page, but leave the index policy un-
 318          * touched.
 319          *
 320          * @param $policy string Either 'follow' or 'nofollow'.
 321          * @return null
 322          */
 323         public function setFollowPolicy( $policy ) {
 324                 $policy = trim( $policy );
 325                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 326                         $this->mFollowPolicy = $policy;
 327                 }
 328         }
 329
 330         /**
 331          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 332          */
 333         public function setHTMLTitle( $name ) {
 334                 $this->mHTMLtitle = $name;
 335         }
 336
 337         /**
 338          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 339          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 340          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 341          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 342          */
 343         public function setPageTitle( $name ) {
 344                 global $wgContLang;
 345                 $name = $wgContLang->convert( $name, true );
 346                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 347                 # but leave "<i>foobar</i>" alone
 348                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 349                 $this->mPagetitle = $nameWithTags;
 350
 351                 $taction =  $this->getPageTitleActionText();
 352                 if( !empty( $taction ) ) {
 353                         $name .= ' - '.$taction;
 354                 }
 355
 356                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 357                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 358         }
 359
 360         public function setTitle( $t ) {
 361                 $this->mTitle = $t;
 362         }
 363
 364         public function getTitle() {
 365                 if ( $this->mTitle instanceof Title ) {
 366                         return $this->mTitle;
 367                 }
 368                 else {
 369                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 370                         global $wgTitle;
 371                         return $wgTitle;
 372                 }
 373         }
 374
 375         public function getHTMLTitle() { return $this->mHTMLtitle; }
 376         public function getPageTitle() { return $this->mPagetitle; }
 377         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 378         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 379         public function getSubtitle() { return $this->mSubtitle; }
 380         public function isArticle() { return $this->mIsarticle; }
 381         public function setPrintable() { $this->mPrintable = true; }
 382         public function isPrintable() { return $this->mPrintable; }
 383         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 384         public function isSyndicated() { return $this->mShowFeedLinks; }
 385         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 386         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 387         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 388         public function getOnloadHandler() { return $this->mOnloadHandler; }
 389         public function disable() { $this->mDoNothing = true; }
 390         public function isDisabled() { return $this->mDoNothing; }
 391
 392         public function setArticleRelated( $v ) {
 393                 $this->mIsArticleRelated = $v;
 394                 if ( !$v ) {
 395                         $this->mIsarticle = false;
 396                 }
 397         }
 398         public function setArticleFlag( $v ) {
 399                 $this->mIsarticle = $v;
 400                 if ( $v ) {
 401                         $this->mIsArticleRelated = $v;
 402                 }
 403         }
 404
 405         public function isArticleRelated() { return $this->mIsArticleRelated; }
 406
 407         public function getLanguageLinks() { return $this->mLanguageLinks; }
 408         public function addLanguageLinks($newLinkArray) {
 409                 $this->mLanguageLinks += $newLinkArray;
 410         }
 411         public function setLanguageLinks($newLinkArray) {
 412                 $this->mLanguageLinks = $newLinkArray;
 413         }
 414
 415         public function getCategoryLinks() {
 416                 return $this->mCategoryLinks;
 417         }
 418
 419         /**
 420          * Add an array of categories, with names in the keys
 421          */
 422         public function addCategoryLinks( $categories ) {
 423                 global $wgUser, $wgContLang;
 424
 425                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 426                         return;
 427                 }
 428
 429                 # Add the links to a LinkBatch
 430                 $arr = array( NS_CATEGORY => $categories );
 431                 $lb = new LinkBatch;
 432                 $lb->setArray( $arr );
 433
 434                 # Fetch existence plus the hiddencat property
 435                 $dbr = wfGetDB( DB_SLAVE );
 436                 $pageTable = $dbr->tableName( 'page' );
 437                 $where = $lb->constructSet( 'page', $dbr );
 438                 $propsTable = $dbr->tableName( 'page_props' );
 439                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 440                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 441                 $res = $dbr->query( $sql, __METHOD__ );
 442
 443                 # Add the results to the link cache
 444                 $lb->addResultToCache( LinkCache::singleton(), $res );
 445
 446                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 447                 $categories = array_combine( array_keys( $categories ),
 448                         array_fill( 0, count( $categories ), 'normal' ) );
 449
 450                 # Mark hidden categories
 451                 foreach ( $res as $row ) {
 452                         if ( isset( $row->pp_value ) ) {
 453                                 $categories[$row->page_title] = 'hidden';
 454                         }
 455                 }
 456
 457                 # Add the remaining categories to the skin
 458                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 459                         $sk = $wgUser->getSkin();
 460                         foreach ( $categories as $category => $type ) {
 461                                 $origcategory = $category;
 462                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 463                                 $wgContLang->findVariantLink( $category, $title, true );
 464                                 if ( $category != $origcategory )
 465                                         if ( array_key_exists( $category, $categories ) )
 466                                                 continue;
 467                                 $text = $wgContLang->convertHtml( $title->getText() );
 468                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 469                         }
 470                 }
 471         }
 472
 473         public function setCategoryLinks($categories) {
 474                 $this->mCategoryLinks = array();
 475                 $this->addCategoryLinks($categories);
 476         }
 477
 478         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 479         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 480
 481         public function disallowUserJs() { $this->mAllowUserJs = false; }
 482         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 483
 484         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 485         public function addHTML( $text ) { $this->mBodytext .= $text; }
 486         public function clearHTML() { $this->mBodytext = ''; }
 487         public function getHTML() { return $this->mBodytext; }
 488         public function debug( $text ) { $this->mDebugtext .= $text; }
 489
 490         /* @deprecated */
 491         public function setParserOptions( $options ) {
 492                 wfDeprecated( __METHOD__ );
 493                 return $this->parserOptions( $options );
 494         }
 495
 496         public function parserOptions( $options = null ) {
 497                 if ( !$this->mParserOptions ) {
 498                         $this->mParserOptions = new ParserOptions;
 499                 }
 500                 return wfSetVar( $this->mParserOptions, $options );
 501         }
 502
 503         /**
 504          * Set the revision ID which will be seen by the wiki text parser
 505          * for things such as embedded {{REVISIONID}} variable use.
 506          * @param mixed $revid an integer, or NULL
 507          * @return mixed previous value
 508          */
 509         public function setRevisionId( $revid ) {
 510                 $val = is_null( $revid ) ? null : intval( $revid );
 511                 return wfSetVar( $this->mRevisionId, $val );
 512         }
 513
 514         public function getRevisionId() {
 515                 return $this->mRevisionId;
 516         }
 517
 518         /**
 519          * Convert wikitext to HTML and add it to the buffer
 520          * Default assumes that the current page title will
 521          * be used.
 522          *
 523          * @param string $text
 524          * @param bool   $linestart
 525          */
 526         public function addWikiText( $text, $linestart = true ) {
 527                 $title = $this->getTitle(); // Work arround E_STRICT
 528                 $this->addWikiTextTitle( $text, $title, $linestart );
 529         }
 530
 531         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 532                 $this->addWikiTextTitle($text, $title, $linestart);
 533         }
 534
 535         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 536                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 537         }
 538
 539         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 540                 global $wgParser;
 541
 542                 wfProfileIn( __METHOD__ );
 543
 544                 wfIncrStats( 'pcache_not_possible' );
 545
 546                 $popts = $this->parserOptions();
 547                 $oldTidy = $popts->setTidy( $tidy );
 548
 549                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 550                         $linestart, true, $this->mRevisionId );
 551
 552                 $popts->setTidy( $oldTidy );
 553
 554                 $this->addParserOutput( $parserOutput );
 555
 556                 wfProfileOut( __METHOD__ );
 557         }
 558
 559         /**
 560          * @todo document
 561          * @param ParserOutput object &$parserOutput
 562          */
 563         public function addParserOutputNoText( &$parserOutput ) {
 564                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 565
 566                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 567                 $this->addCategoryLinks( $parserOutput->getCategories() );
 568                 $this->mNewSectionLink = $parserOutput->getNewSection();
 569                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 570
 571                 if( is_null( $wgExemptFromUserRobotsControl ) ) {
 572                         $bannedNamespaces = $wgContentNamespaces;
 573                 } else {
 574                         $bannedNamespaces = $wgExemptFromUserRobotsControl;
 575                 }
 576                 if( !in_array( $this->getTitle()->getNamespace(), $bannedNamespaces ) ) {
 577                         # FIXME (bug 14900): This overrides $wgArticleRobotPolicies, and it
 578                         # shouldn't
 579                         $this->setIndexPolicy( $parserOutput->getIndexPolicy() );
 580                 }
 581
 582                 $this->addKeywords( $parserOutput );
 583                 $this->mParseWarnings = $parserOutput->getWarnings();
 584                 if ( $parserOutput->getCacheTime() == -1 ) {
 585                         $this->enableClientCache( false );
 586                 }
 587                 $this->mNoGallery = $parserOutput->getNoGallery();
 588                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 589                 // Versioning...
 590                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 591                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 592                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 593                         } else {
 594                                 $this->mTemplateIds[$ns] = $dbks;
 595                         }
 596                 }
 597                 // Page title
 598                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 599                         $this->setPageTitle( $dt );
 600                 else if ( ( $title = $parserOutput->getTitleText() ) != '' )
 601                         $this->setPageTitle( $title );
 602
 603                 // Hooks registered in the object
 604                 global $wgParserOutputHooks;
 605                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 606                         list( $hookName, $data ) = $hookInfo;
 607                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 608                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 609                         }
 610                 }
 611
 612                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 613         }
 614
 615         /**
 616          * @todo document
 617          * @param ParserOutput &$parserOutput
 618          */
 619         function addParserOutput( &$parserOutput ) {
 620                 $this->addParserOutputNoText( $parserOutput );
 621                 $text = $parserOutput->getText();
 622                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 623                 $this->addHTML( $text );
 624         }
 625
 626         /**
 627          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 628          * Saves the text into the parser cache if possible.
 629          *
 630          * @param string  $text
 631          * @param Article $article
 632          * @param bool    $cache
 633          * @deprecated Use Article::outputWikitext
 634          */
 635         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 636                 global $wgParser;
 637
 638                 wfDeprecated( __METHOD__ );
 639
 640                 $popts = $this->parserOptions();
 641                 $popts->setTidy(true);
 642                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 643                         $popts, true, true, $this->mRevisionId );
 644                 $popts->setTidy(false);
 645                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 646                         $parserCache = ParserCache::singleton();
 647                         $parserCache->save( $parserOutput, $article, $popts);
 648                 }
 649
 650                 $this->addParserOutput( $parserOutput );
 651         }
 652
 653         /**
 654          * @deprecated use addWikiTextTidy()
 655          */
 656         public function addSecondaryWikiText( $text, $linestart = true ) {
 657                 wfDeprecated( __METHOD__ );
 658                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 659         }
 660
 661         /**
 662          * Add wikitext with tidy enabled
 663          */
 664         public function addWikiTextTidy(  $text, $linestart = true ) {
 665                 $title = $this->getTitle();
 666                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 667         }
 668
 669
 670         /**
 671          * Add the output of a QuickTemplate to the output buffer
 672          *
 673          * @param QuickTemplate $template
 674          */
 675         public function addTemplate( &$template ) {
 676                 ob_start();
 677                 $template->execute();
 678                 $this->addHTML( ob_get_contents() );
 679                 ob_end_clean();
 680         }
 681
 682         /**
 683          * Parse wikitext and return the HTML.
 684          *
 685          * @param string $text
 686          * @param bool   $linestart Is this the start of a line?
 687          * @param bool   $interface ??
 688          */
 689         public function parse( $text, $linestart = true, $interface = false ) {
 690                 global $wgParser;
 691                 if( is_null( $this->getTitle() ) ) {
 692                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 693                 }
 694                 $popts = $this->parserOptions();
 695                 if ( $interface) { $popts->setInterfaceMessage(true); }
 696                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 697                         $linestart, true, $this->mRevisionId );
 698                 if ( $interface) { $popts->setInterfaceMessage(false); }
 699                 return $parserOutput->getText();
 700         }
 701
 702         /** Parse wikitext, strip paragraphs, and return the HTML. */
 703         public function parseInline( $text, $linestart = true, $interface = false ) {
 704                 $parsed = $this->parse( $text, $linestart, $interface );
 705
 706                 $m = array();
 707                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 708                         $parsed = $m[1];
 709                 }
 710
 711                 return $parsed;
 712         }
 713
 714         /**
 715          * @param Article $article
 716          * @param User    $user
 717          *
 718          * Now a wrapper around Article::tryParserCache()
 719          *
 720          * @return bool True if successful, else false.
 721          */
 722         public function tryParserCache( &$article ) {
 723                 $parserOutput = $article->tryParserCache( $this->parserOptions() );
 724
 725                 if ($parserOutput !== false) {
 726                         $this->addParserOutput( $parserOutput );
 727                         return true;
 728                 } else {
 729                         return false;
 730                 }
 731         }
 732
 733         /**
 734          * @param int $maxage Maximum cache time on the Squid, in seconds.
 735          */
 736         public function setSquidMaxage( $maxage ) {
 737                 $this->mSquidMaxage = $maxage;
 738         }
 739
 740         /**
 741          * Use enableClientCache(false) to force it to send nocache headers
 742          * @param $state ??
 743          */
 744         public function enableClientCache( $state ) {
 745                 return wfSetVar( $this->mEnableClientCache, $state );
 746         }
 747
 748         function getCacheVaryCookies() {
 749                 global $wgCookiePrefix, $wgCacheVaryCookies;
 750                 static $cookies;
 751                 if ( $cookies === null ) {
 752                         $cookies = array_merge(
 753                                 array(
 754                                         "{$wgCookiePrefix}Token",
 755                                         "{$wgCookiePrefix}LoggedOut",
 756                                         session_name()
 757                                 ),
 758                                 $wgCacheVaryCookies
 759                         );
 760                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 761                 }
 762                 return $cookies;
 763         }
 764
 765         function uncacheableBecauseRequestVars() {
 766                 global $wgRequest;
 767                 return  $wgRequest->getText('useskin', false) === false
 768                         && $wgRequest->getText('uselang', false) === false;
 769         }
 770
 771         /**
 772          * Check if the request has a cache-varying cookie header
 773          * If it does, it's very important that we don't allow public caching
 774          */
 775         function haveCacheVaryCookies() {
 776                 global $wgRequest;
 777                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 778                 if ( $cookieHeader === false ) {
 779                         return false;
 780                 }
 781                 $cvCookies = $this->getCacheVaryCookies();
 782                 foreach ( $cvCookies as $cookieName ) {
 783                         # Check for a simple string match, like the way squid does it
 784                         if ( strpos( $cookieHeader, $cookieName ) ) {
 785                                 wfDebug( __METHOD__.": found $cookieName\n" );
 786                                 return true;
 787                         }
 788                 }
 789                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 790                 return false;
 791         }
 792
 793         /** Get a complete X-Vary-Options header */
 794         public function getXVO() {
 795                 $cvCookies = $this->getCacheVaryCookies();
 796                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 797                 $first = true;
 798                 foreach ( $cvCookies as $cookieName ) {
 799                         if ( $first ) {
 800                                 $first = false;
 801                         } else {
 802                                 $xvo .= ';';
 803                         }
 804                         $xvo .= 'string-contains=' . $cookieName;
 805                 }
 806                 return $xvo;
 807         }
 808
 809         public function sendCacheControl() {
 810                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 811
 812                 $response = $wgRequest->response();
 813                 if ($wgUseETag && $this->mETag)
 814                         $response->header("ETag: $this->mETag");
 815
 816                 # don't serve compressed data to clients who can't handle it
 817                 # maintain different caches for logged-in users and non-logged in ones
 818                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 819
 820                 # Add an X-Vary-Options header for Squid with Wikimedia patches
 821                 $response->header( $this->getXVO() );
 822
 823                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 824                         if( $wgUseSquid && session_id() == '' &&
 825                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 826                         {
 827                                 if ( $wgUseESI ) {
 828                                         # We'll purge the proxy cache explicitly, but require end user agents
 829                                         # to revalidate against the proxy on each visit.
 830                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 831                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 832                                         # start with a shorter timeout for initial testing
 833                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 834                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 835                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 836                                 } else {
 837                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 838                                         # to revalidate against the proxy on each visit.
 839                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 840                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 841                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 842                                         # start with a shorter timeout for initial testing
 843                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 844                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 845                                 }
 846                         } else {
 847                                 # We do want clients to cache if they can, but they *must* check for updates
 848                                 # on revisiting the page.
 849                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 850                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 851                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 852                         }
 853                         if($this->mLastModified) {
 854                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 855                         }
 856                 } else {
 857                         wfDebug( __METHOD__ . ": no caching **\n", false );
 858
 859                         # In general, the absence of a last modified header should be enough to prevent
 860                         # the client from using its cache. We send a few other things just to make sure.
 861                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 862                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 863                         $response->header( 'Pragma: no-cache' );
 864                 }
 865         }
 866
 867         /**
 868          * Finally, all the text has been munged and accumulated into
 869          * the object, let's actually output it:
 870          */
 871         public function output() {
 872                 global $wgUser, $wgOutputEncoding, $wgRequest;
 873                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 874                 global $wgJsMimeType, $wgUseAjax, $wgAjaxWatch;
 875                 global $wgEnableMWSuggest, $wgUniversalEditButton;
 876                 global $wgArticle;
 877
 878                 if( $this->mDoNothing ){
 879                         return;
 880                 }
 881
 882                 wfProfileIn( __METHOD__ );
 883
 884                 if ( '' != $this->mRedirect ) {
 885                         # Standards require redirect URLs to be absolute
 886                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
 887                         if( $this->mRedirectCode == '301') {
 888                                 if( !$wgDebugRedirects ) {
 889                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 890                                 }
 891                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 892                         }
 893
 894                         $this->sendCacheControl();
 895
 896                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 897                         if( $wgDebugRedirects ) {
 898                                 $url = htmlspecialchars( $this->mRedirect );
 899                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 900                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 901                                 print "</body>\n</html>\n";
 902                         } else {
 903                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 904                         }
 905                         wfProfileOut( __METHOD__ );
 906                         return;
 907                 }
 908                 elseif ( $this->mStatusCode )
 909                 {
 910                         $statusMessage = array(
 911                                 100 => 'Continue',
 912                                 101 => 'Switching Protocols',
 913                                 102 => 'Processing',
 914                                 200 => 'OK',
 915                                 201 => 'Created',
 916                                 202 => 'Accepted',
 917                                 203 => 'Non-Authoritative Information',
 918                                 204 => 'No Content',
 919                                 205 => 'Reset Content',
 920                                 206 => 'Partial Content',
 921                                 207 => 'Multi-Status',
 922                                 300 => 'Multiple Choices',
 923                                 301 => 'Moved Permanently',
 924                                 302 => 'Found',
 925                                 303 => 'See Other',
 926                                 304 => 'Not Modified',
 927                                 305 => 'Use Proxy',
 928                                 307 => 'Temporary Redirect',
 929                                 400 => 'Bad Request',
 930                                 401 => 'Unauthorized',
 931                                 402 => 'Payment Required',
 932                                 403 => 'Forbidden',
 933                                 404 => 'Not Found',
 934                                 405 => 'Method Not Allowed',
 935                                 406 => 'Not Acceptable',
 936                                 407 => 'Proxy Authentication Required',
 937                                 408 => 'Request Timeout',
 938                                 409 => 'Conflict',
 939                                 410 => 'Gone',
 940                                 411 => 'Length Required',
 941                                 412 => 'Precondition Failed',
 942                                 413 => 'Request Entity Too Large',
 943                                 414 => 'Request-URI Too Large',
 944                                 415 => 'Unsupported Media Type',
 945                                 416 => 'Request Range Not Satisfiable',
 946                                 417 => 'Expectation Failed',
 947                                 422 => 'Unprocessable Entity',
 948                                 423 => 'Locked',
 949                                 424 => 'Failed Dependency',
 950                                 500 => 'Internal Server Error',
 951                                 501 => 'Not Implemented',
 952                                 502 => 'Bad Gateway',
 953                                 503 => 'Service Unavailable',
 954                                 504 => 'Gateway Timeout',
 955                                 505 => 'HTTP Version Not Supported',
 956                                 507 => 'Insufficient Storage'
 957                         );
 958
 959                         if ( $statusMessage[$this->mStatusCode] )
 960                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 961                 }
 962
 963                 $sk = $wgUser->getSkin();
 964
 965                 if ( $wgUseAjax ) {
 966                         $this->addScriptFile( 'ajax.js' );
 967
 968                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 969
 970                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 971                                 $this->addScriptFile( 'ajaxwatch.js' );
 972                         }
 973
 974                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
 975                                 $this->addScriptFile( 'mwsuggest.js' );
 976                         }
 977                 }
 978
 979                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
 980                         $this->addScriptFile( 'rightclickedit.js' );
 981                 }
 982
 983                 if( $wgUniversalEditButton ) {
 984                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
 985                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
 986                                 // Original UniversalEditButton
 987                                 $this->addLink( array(
 988                                         'rel' => 'alternate',
 989                                         'type' => 'application/x-wiki',
 990                                         'title' => wfMsg( 'edit' ),
 991                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
 992                                 ) );
 993                                 // Alternate edit link
 994                                 $this->addLink( array(
 995                                         'rel' => 'edit',
 996                                         'title' => wfMsg( 'edit' ),
 997                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
 998                                 ) );
 999                         }
1000                 }
1001
1002                 # Buffer output; final headers may depend on later processing
1003                 ob_start();
1004
1005                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1006                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1007
1008                 if ($this->mArticleBodyOnly) {
1009                         $this->out($this->mBodytext);
1010                 } else {
1011                         // Hook that allows last minute changes to the output page, e.g.
1012                         // adding of CSS or Javascript by extensions.
1013                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1014
1015                         wfProfileIn( 'Output-skin' );
1016                         $sk->outputPage( $this );
1017                         wfProfileOut( 'Output-skin' );
1018                 }
1019
1020                 $this->sendCacheControl();
1021                 ob_end_flush();
1022                 wfProfileOut( __METHOD__ );
1023         }
1024
1025         /**
1026          * Actually output something with print(). Performs an iconv to the
1027          * output encoding, if needed.
1028          * @param string $ins The string to output
1029          */
1030         public function out( $ins ) {
1031                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1032                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1033                         $outs = $ins;
1034                 } else {
1035                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1036                         if ( false === $outs ) { $outs = $ins; }
1037                 }
1038                 print $outs;
1039         }
1040
1041         /**
1042          * @todo document
1043          */
1044         public static function setEncodings() {
1045                 global $wgInputEncoding, $wgOutputEncoding;
1046                 global $wgContLang;
1047
1048                 $wgInputEncoding = strtolower( $wgInputEncoding );
1049
1050                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1051                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1052                         return;
1053                 }
1054                 $wgOutputEncoding = $wgInputEncoding;
1055         }
1056
1057         /**
1058          * Deprecated, use wfReportTime() instead.
1059          * @return string
1060          * @deprecated
1061          */
1062         public function reportTime() {
1063                 wfDeprecated( __METHOD__ );
1064                 $time = wfReportTime();
1065                 return $time;
1066         }
1067
1068         /**
1069          * Produce a "user is blocked" page.
1070          *
1071          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1072          * @return nothing
1073          */
1074         function blockedPage( $return = true ) {
1075                 global $wgUser, $wgContLang, $wgLang;
1076
1077                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1078                 $this->setRobotPolicy( 'noindex,nofollow' );
1079                 $this->setArticleRelated( false );
1080
1081                 $name = User::whoIs( $wgUser->blockedBy() );
1082                 $reason = $wgUser->blockedFor();
1083                 if( $reason == '' ) {
1084                         $reason = wfMsg( 'blockednoreason' );
1085                 }
1086                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1087                 $ip = wfGetIP();
1088
1089                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1090
1091                 $blockid = $wgUser->mBlock->mId;
1092
1093                 $blockExpiry = $wgUser->mBlock->mExpiry;
1094                 if ( $blockExpiry == 'infinity' ) {
1095                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1096                         // Search for localization in 'ipboptions'
1097                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1098                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1099                                 if ( strpos( $option, ":" ) === false )
1100                                         continue;
1101                                 list( $show, $value ) = explode( ":", $option );
1102                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1103                                         $blockExpiry = $show;
1104                                         break;
1105                                 }
1106                         }
1107                 } else {
1108                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1109                 }
1110
1111                 if ( $wgUser->mBlock->mAuto ) {
1112                         $msg = 'autoblockedtext';
1113                 } else {
1114                         $msg = 'blockedtext';
1115                 }
1116
1117                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1118                  * This could be a username, an ip range, or a single ip. */
1119                 $intended = $wgUser->mBlock->mAddress;
1120
1121                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1122
1123                 # Don't auto-return to special pages
1124                 if( $return ) {
1125                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1126                         $this->returnToMain( null, $return );
1127                 }
1128         }
1129
1130         /**
1131          * Output a standard error page
1132          *
1133          * @param string $title Message key for page title
1134          * @param string $msg Message key for page text
1135          * @param array $params Message parameters
1136          */
1137         public function showErrorPage( $title, $msg, $params = array() ) {
1138                 if ( $this->getTitle() ) {
1139                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1140                 }
1141                 $this->setPageTitle( wfMsg( $title ) );
1142                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1143                 $this->setRobotPolicy( 'noindex,nofollow' );
1144                 $this->setArticleRelated( false );
1145                 $this->enableClientCache( false );
1146                 $this->mRedirect = '';
1147                 $this->mBodytext = '';
1148
1149                 array_unshift( $params, 'parse' );
1150                 array_unshift( $params, $msg );
1151                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1152
1153                 $this->returnToMain();
1154         }
1155
1156         /**
1157          * Output a standard permission error page
1158          *
1159          * @param array $errors Error message keys
1160          */
1161         public function showPermissionsErrorPage( $errors, $action = null )
1162         {
1163                 $this->mDebugtext .= 'Original title: ' .
1164                 $this->getTitle()->getPrefixedText() . "\n";
1165                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1166                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1167                 $this->setRobotPolicy( 'noindex,nofollow' );
1168                 $this->setArticleRelated( false );
1169                 $this->enableClientCache( false );
1170                 $this->mRedirect = '';
1171                 $this->mBodytext = '';
1172                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1173         }
1174
1175         /** @deprecated */
1176         public function errorpage( $title, $msg ) {
1177                 wfDeprecated( __METHOD__ );
1178                 throw new ErrorPageError( $title, $msg );
1179         }
1180
1181         /**
1182          * Display an error page indicating that a given version of MediaWiki is
1183          * required to use it
1184          *
1185          * @param mixed $version The version of MediaWiki needed to use the page
1186          */
1187         public function versionRequired( $version ) {
1188                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1189                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1190                 $this->setRobotPolicy( 'noindex,nofollow' );
1191                 $this->setArticleRelated( false );
1192                 $this->mBodytext = '';
1193
1194                 $this->addWikiMsg( 'versionrequiredtext', $version );
1195                 $this->returnToMain();
1196         }
1197
1198         /**
1199          * Display an error page noting that a given permission bit is required.
1200          *
1201          * @param string $permission key required
1202          */
1203         public function permissionRequired( $permission ) {
1204                 global $wgLang;
1205
1206                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1207                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1208                 $this->setRobotPolicy( 'noindex,nofollow' );
1209                 $this->setArticleRelated( false );
1210                 $this->mBodytext = '';
1211
1212                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1213                         User::getGroupsWithPermission( $permission ) );
1214                 if( $groups ) {
1215                         $this->addWikiMsg( 'badaccess-groups',
1216                                 $wgLang->commaList( $groups ),
1217                                 count( $groups) );
1218                 } else {
1219                         $this->addWikiMsg( 'badaccess-group0' );
1220                 }
1221                 $this->returnToMain();
1222         }
1223
1224         /**
1225          * Use permissionRequired.
1226          * @deprecated
1227          */
1228         public function sysopRequired() {
1229                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1230         }
1231
1232         /**
1233          * Use permissionRequired.
1234          * @deprecated
1235          */
1236         public function developerRequired() {
1237                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1238         }
1239
1240         /**
1241          * Produce the stock "please login to use the wiki" page
1242          */
1243         public function loginToUse() {
1244                 global $wgUser, $wgContLang;
1245
1246                 if( $wgUser->isLoggedIn() ) {
1247                         $this->permissionRequired( 'read' );
1248                         return;
1249                 }
1250
1251                 $skin = $wgUser->getSkin();
1252
1253                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1254                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1255                 $this->setRobotPolicy( 'noindex,nofollow' );
1256                 $this->setArticleFlag( false );
1257
1258                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1259                 $loginLink = $skin->link(
1260                         $loginTitle,
1261                         wfMsgHtml( 'loginreqlink' ),
1262                         array(),
1263                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1264                         array( 'known', 'noclasses' )
1265                 );
1266                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1267                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1268
1269                 # Don't return to the main page if the user can't read it
1270                 # otherwise we'll end up in a pointless loop
1271                 $mainPage = Title::newMainPage();
1272                 if( $mainPage->userCanRead() )
1273                         $this->returnToMain( null, $mainPage );
1274         }
1275
1276         /** @deprecated */
1277         public function databaseError( $fname, $sql, $error, $errno ) {
1278                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1279         }
1280
1281         /**
1282          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1283          * @return string The wikitext error-messages, formatted into a list.
1284          */
1285         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1286                 if ($action == null) {
1287                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1288                 } else {
1289                         global $wgLang;
1290                         $action_desc = wfMsgNoTrans( "action-$action" );
1291                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1292                 }
1293
1294                 if (count( $errors ) > 1) {
1295                         $text .= '<ul class="permissions-errors">' . "\n";
1296
1297                         foreach( $errors as $error )
1298                         {
1299                                 $text .= '<li>';
1300                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1301                                 $text .= "</li>\n";
1302                         }
1303                         $text .= '</ul>';
1304                 } else {
1305                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1306                 }
1307
1308                 return $text;
1309         }
1310
1311         /**
1312          * Display a page stating that the Wiki is in read-only mode,
1313          * and optionally show the source of the page that the user
1314          * was trying to edit.  Should only be called (for this
1315          * purpose) after wfReadOnly() has returned true.
1316          *
1317          * For historical reasons, this function is _also_ used to
1318          * show the error message when a user tries to edit a page
1319          * they are not allowed to edit.  (Unless it's because they're
1320          * blocked, then we show blockedPage() instead.)  In this
1321          * case, the second parameter should be set to true and a list
1322          * of reasons supplied as the third parameter.
1323          *
1324          * @todo Needs to be split into multiple functions.
1325          *
1326          * @param string $source    Source code to show (or null).
1327          * @param bool   $protected Is this a permissions error?
1328          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1329          */
1330         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1331                 global $wgUser;
1332                 $skin = $wgUser->getSkin();
1333
1334                 $this->setRobotPolicy( 'noindex,nofollow' );
1335                 $this->setArticleRelated( false );
1336
1337                 // If no reason is given, just supply a default "I can't let you do
1338                 // that, Dave" message.  Should only occur if called by legacy code.
1339                 if ( $protected && empty($reasons) ) {
1340                         $reasons[] = array( 'badaccess-group0' );
1341                 }
1342
1343                 if ( !empty($reasons) ) {
1344                         // Permissions error
1345                         if( $source ) {
1346                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1347                                 $this->setSubtitle(
1348                                         wfMsg(
1349                                                 'viewsourcefor',
1350                                                 $skin->link(
1351                                                         $this->getTitle(),
1352                                                         null,
1353                                                         array(),
1354                                                         array(),
1355                                                         array( 'known', 'noclasses' )
1356                                                 )
1357                                         )
1358                                 );
1359                         } else {
1360                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1361                         }
1362                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1363                 } else {
1364                         // Wiki is read only
1365                         $this->setPageTitle( wfMsg( 'readonly' ) );
1366                         $reason = wfReadOnlyReason();
1367                         $this->wrapWikiMsg( '<div class="mw-readonly-error">$1</div>', array( 'readonlytext', $reason ) );
1368                 }
1369
1370                 // Show source, if supplied
1371                 if( is_string( $source ) ) {
1372                         $this->addWikiMsg( 'viewsourcetext' );
1373                         $text = Xml::openElement( 'textarea',
1374                                                 array( 'id'   => 'wpTextbox1',
1375                                                        'name' => 'wpTextbox1',
1376                                                        'cols' => $wgUser->getOption( 'cols' ),
1377                                                        'rows' => $wgUser->getOption( 'rows' ),
1378                                                        'readonly' => 'readonly' ) );
1379                         $text .= htmlspecialchars( $source );
1380                         $text .= Xml::closeElement( 'textarea' );
1381                         $this->addHTML( $text );
1382
1383                         // Show templates used by this article
1384                         $skin = $wgUser->getSkin();
1385                         $article = new Article( $this->getTitle() );
1386                         $this->addHTML( "<div class='templatesUsed'>
1387 {$skin->formatTemplates( $article->getUsedTemplates() )}
1388 </div>
1389 " );
1390                 }
1391
1392                 # If the title doesn't exist, it's fairly pointless to print a return
1393                 # link to it.  After all, you just tried editing it and couldn't, so
1394                 # what's there to do there?
1395                 if( $this->getTitle()->exists() ) {
1396                         $this->returnToMain( null, $this->getTitle() );
1397                 }
1398         }
1399
1400         /** @deprecated */
1401         public function fatalError( $message ) {
1402                 wfDeprecated( __METHOD__ );
1403                 throw new FatalError( $message );
1404         }
1405
1406         /** @deprecated */
1407         public function unexpectedValueError( $name, $val ) {
1408                 wfDeprecated( __METHOD__ );
1409                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1410         }
1411
1412         /** @deprecated */
1413         public function fileCopyError( $old, $new ) {
1414                 wfDeprecated( __METHOD__ );
1415                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1416         }
1417
1418         /** @deprecated */
1419         public function fileRenameError( $old, $new ) {
1420                 wfDeprecated( __METHOD__ );
1421                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1422         }
1423
1424         /** @deprecated */
1425         public function fileDeleteError( $name ) {
1426                 wfDeprecated( __METHOD__ );
1427                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1428         }
1429
1430         /** @deprecated */
1431         public function fileNotFoundError( $name ) {
1432                 wfDeprecated( __METHOD__ );
1433                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1434         }
1435
1436         public function showFatalError( $message ) {
1437                 $this->setPageTitle( wfMsg( "internalerror" ) );
1438                 $this->setRobotPolicy( "noindex,nofollow" );
1439                 $this->setArticleRelated( false );
1440                 $this->enableClientCache( false );
1441                 $this->mRedirect = '';
1442                 $this->mBodytext = $message;
1443         }
1444
1445         public function showUnexpectedValueError( $name, $val ) {
1446                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1447         }
1448
1449         public function showFileCopyError( $old, $new ) {
1450                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1451         }
1452
1453         public function showFileRenameError( $old, $new ) {
1454                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1455         }
1456
1457         public function showFileDeleteError( $name ) {
1458                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1459         }
1460
1461         public function showFileNotFoundError( $name ) {
1462                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1463         }
1464
1465         /**
1466          * Add a "return to" link pointing to a specified title
1467          *
1468          * @param Title $title Title to link
1469          */
1470         public function addReturnTo( $title ) {
1471                 global $wgUser;
1472                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1473                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link( $title ) );
1474                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1475         }
1476
1477         /**
1478          * Add a "return to" link pointing to a specified title,
1479          * or the title indicated in the request, or else the main page
1480          *
1481          * @param null $unused No longer used
1482          * @param Title $returnto Title to return to
1483          */
1484         public function returnToMain( $unused = null, $returnto = NULL ) {
1485                 global $wgRequest;
1486
1487                 if ( $returnto == NULL ) {
1488                         $returnto = $wgRequest->getText( 'returnto' );
1489                 }
1490
1491                 if ( '' === $returnto ) {
1492                         $returnto = Title::newMainPage();
1493                 }
1494
1495                 if ( is_object( $returnto ) ) {
1496                         $titleObj = $returnto;
1497                 } else {
1498                         $titleObj = Title::newFromText( $returnto );
1499                 }
1500                 if ( !is_object( $titleObj ) ) {
1501                         $titleObj = Title::newMainPage();
1502                 }
1503
1504                 $this->addReturnTo( $titleObj );
1505         }
1506
1507         /**
1508          * This function takes the title (first item of mGoodLinks), categories,
1509          * existing and broken links for the page
1510          * and uses the first 10 of them for META keywords
1511          *
1512          * @param ParserOutput &$parserOutput
1513          */
1514         private function addKeywords( &$parserOutput ) {
1515                 global $wgContLang;
1516                 // Get an array of keywords if there are more than one
1517                 // variant of the site language
1518                 $text = $wgContLang->autoConvertToAllVariants( $this->getTitle()->getPrefixedText());
1519                 // array_values: We needn't to merge variant's code name
1520                 // into $this->mKeywords;
1521                 // array_unique: We should insert a keyword just for once
1522                 if( is_array( $text ))
1523                         $text = array_unique( array_values( $text ));
1524                 $this->addKeyword( $text );
1525                 $count = 1;
1526                 $links2d =& $parserOutput->getLinks();
1527                 if ( !is_array( $links2d ) ) {
1528                         return;
1529                 }
1530                 foreach ( $links2d as $dbkeys ) {
1531                         foreach( $dbkeys as $dbkey => $unused ) {
1532                                 $dbkey = $wgContLang->autoConvertToAllVariants( $dbkey );
1533                                 if( is_array( $dbkey ))
1534                                         $dbkey = array_unique( array_values( $dbkey ));
1535                                 $this->addKeyword( $dbkey );
1536                                 if ( ++$count > 10 ) {
1537                                         break 2;
1538                                 }
1539                         }
1540                 }
1541         }
1542
1543         /**
1544          * @return string The doctype, opening <html>, and head element.
1545          */
1546         public function headElement( Skin $sk ) {
1547                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1548                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1549                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion;
1550
1551                 $this->addMeta( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" );
1552                 $this->addStyle( 'common/wikiprintable.css', 'print' );
1553                 $sk->setupUserCss( $this );
1554
1555                 $ret = '';
1556
1557                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1558                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1559                 }
1560
1561                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1562
1563                 if ( '' == $this->getHTMLTitle() ) {
1564                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1565                 }
1566
1567                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1568                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1569                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1570                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1571                 }
1572                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1573                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n\t\t";
1574                 $ret .= implode( "\t\t", array(
1575                         $this->getHeadLinks(),
1576                         $this->buildCssLinks(),
1577                         $sk->getHeadScripts( $this->mAllowUserJs ),
1578                         $this->mScripts,
1579                         $this->getHeadItems(),
1580                 ));
1581                 if( $sk->usercss ){
1582                         $ret .= "<style type='text/css'>{$sk->usercss}</style>";
1583                 }
1584
1585                 if ($wgUseTrackbacks && $this->isArticleRelated())
1586                         $ret .= $this->getTitle()->trackbackRDF();
1587
1588                 $ret .= "</head>\n";
1589                 return $ret;
1590         }
1591
1592         protected function addDefaultMeta() {
1593                 global $wgVersion;
1594                 $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1595                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1596
1597                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1598                 if( $p !== 'index,follow' ) {
1599                         // http://www.robotstxt.org/wc/meta-user.html
1600                         // Only show if it's different from the default robots policy
1601                         $this->addMeta( 'robots', $p );
1602                 }
1603
1604                 if ( count( $this->mKeywords ) > 0 ) {
1605                         $strip = array(
1606                                 "/<.*?" . ">/" => '',
1607                                 "/_/" => ' '
1608                         );
1609                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1610                 }
1611         }
1612
1613         /**
1614          * @return string HTML tag links to be put in the header.
1615          */
1616         public function getHeadLinks() {
1617                 global $wgRequest, $wgFeed;
1618
1619                 // Ideally this should happen earlier, somewhere. :P
1620                 $this->addDefaultMeta();
1621
1622                 $tags = array();
1623
1624                 foreach ( $this->mMetatags as $tag ) {
1625                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1626                                 $a = 'http-equiv';
1627                                 $tag[0] = substr( $tag[0], 5 );
1628                         } else {
1629                                 $a = 'name';
1630                         }
1631                         $tags[] = Xml::element( 'meta',
1632                                 array(
1633                                         $a => $tag[0],
1634                                         'content' => $tag[1] ) );
1635                 }
1636                 foreach ( $this->mLinktags as $tag ) {
1637                         $tags[] = Xml::element( 'link', $tag );
1638                 }
1639
1640                 if( $wgFeed ) {
1641                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1642                                 # Use the page name for the title (accessed through $wgTitle since
1643                                 # there's no other way).  In principle, this could lead to issues
1644                                 # with having the same name for different feeds corresponding to
1645                                 # the same page, but we can't avoid that at this low a level.
1646
1647                                 $tags[] = $this->feedLink(
1648                                         $format,
1649                                         $link,
1650                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1651                         }
1652
1653                         # Recent changes feed should appear on every page (except recentchanges,
1654                         # that would be redundant). Put it after the per-page feed to avoid
1655                         # changing existing behavior. It's still available, probably via a
1656                         # menu in your browser. Some sites might have a different feed they'd
1657                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1658                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1659                         # If so, use it instead.
1660
1661                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses;
1662                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1663
1664                         if ( $wgOverrideSiteFeed ) {
1665                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1666                                         $tags[] = $this->feedLink (
1667                                                 $type,
1668                                                 htmlspecialchars( $feedUrl ),
1669                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1670                                 }
1671                         }
1672                         else if ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1673                                 foreach( $wgFeedClasses as $format => $class ) {
1674                                         $tags[] = $this->feedLink(
1675                                                 $format,
1676                                                 $rctitle->getLocalURL( "feed={$format}" ),
1677                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1678                                 }
1679                         }
1680                 }
1681
1682                 return implode( "\n\t\t", $tags ) . "\n";
1683         }
1684
1685         /**
1686          * Return URLs for each supported syndication format for this page.
1687          * @return array associating format keys with URLs
1688          */
1689         public function getSyndicationLinks() {
1690                 global $wgFeedClasses;
1691                 $links = array();
1692
1693                 if( $this->isSyndicated() ) {
1694                         if( is_string( $this->getFeedAppendQuery() ) ) {
1695                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1696                         } else {
1697                                 $appendQuery = "";
1698                         }
1699
1700                         foreach( $wgFeedClasses as $format => $class ) {
1701                                 $links[$format] = $this->getTitle()->getLocalUrl( "feed=$format{$appendQuery}" );
1702                         }
1703                 }
1704                 return $links;
1705         }
1706
1707         /**
1708          * Generate a <link rel/> for an RSS feed.
1709          */
1710         private function feedLink( $type, $url, $text ) {
1711                 return Xml::element( 'link', array(
1712                         'rel' => 'alternate',
1713                         'type' => "application/$type+xml",
1714                         'title' => $text,
1715                         'href' => $url ) );
1716         }
1717
1718         /**
1719          * Add a local or specified stylesheet, with the given media options.
1720          * Meant primarily for internal use...
1721          *
1722          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1723          * @param $conditional -- for IE conditional comments, specifying an IE version
1724          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1725          */
1726         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1727                 $options = array();
1728                 if( $media )
1729                         $options['media'] = $media;
1730                 if( $condition )
1731                         $options['condition'] = $condition;
1732                 if( $dir )
1733                         $options['dir'] = $dir;
1734                 $this->styles[$style] = $options;
1735         }
1736
1737         /**
1738          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1739          * These will be applied to various media & IE conditionals.
1740          */
1741         public function buildCssLinks() {
1742                 $links = array();
1743                 foreach( $this->styles as $file => $options ) {
1744                         $link = $this->styleLink( $file, $options );
1745                         if( $link )
1746                                 $links[] = $link;
1747                 }
1748
1749                 return implode( "\n\t\t", $links );
1750         }
1751
1752         protected function styleLink( $style, $options ) {
1753                 global $wgRequest;
1754
1755                 if( isset( $options['dir'] ) ) {
1756                         global $wgContLang;
1757                         $siteDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1758                         if( $siteDir != $options['dir'] )
1759                                 return '';
1760                 }
1761
1762                 if( isset( $options['media'] ) ) {
1763                         $media = $this->transformCssMedia( $options['media'] );
1764                         if( is_null( $media ) ) {
1765                                 return '';
1766                         }
1767                 } else {
1768                         $media = '';
1769                 }
1770
1771                 if( substr( $style, 0, 1 ) == '/' ||
1772                         substr( $style, 0, 5 ) == 'http:' ||
1773                         substr( $style, 0, 6 ) == 'https:' ) {
1774                         $url = $style;
1775                 } else {
1776                         global $wgStylePath, $wgStyleVersion;
1777                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1778                 }
1779
1780                 $attribs = array(
1781                         'rel' => 'stylesheet',
1782                         'href' => $url,
1783                         'type' => 'text/css' );
1784                 if( $media ) {
1785                         $attribs['media'] = $media;
1786                 }
1787
1788                 $link = Xml::element( 'link', $attribs );
1789
1790                 if( isset( $options['condition'] ) ) {
1791                         $condition = htmlspecialchars( $options['condition'] );
1792                         $link = "<!--[if $condition]>$link<![endif]-->";
1793                 }
1794                 return $link;
1795         }
1796
1797         function transformCssMedia( $media ) {
1798                 global $wgRequest, $wgHandheldForIPhone;
1799
1800                 // Switch in on-screen display for media testing
1801                 $switches = array(
1802                         'printable' => 'print',
1803                         'handheld' => 'handheld',
1804                 );
1805                 foreach( $switches as $switch => $targetMedia ) {
1806                         if( $wgRequest->getBool( $switch ) ) {
1807                                 if( $media == $targetMedia ) {
1808                                         $media = '';
1809                                 } elseif( $media == 'screen' ) {
1810                                         return null;
1811                                 }
1812                         }
1813                 }
1814
1815                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1816                 if( $wgHandheldForIPhone ) {
1817                         $mediaAliases = array(
1818                                 'screen' => 'screen and (min-device-width: 481px)',
1819                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1820                         );
1821
1822                         if( isset( $mediaAliases[$media] ) ) {
1823                                 $media = $mediaAliases[$media];
1824                         }
1825                 }
1826
1827                 return $media;
1828         }
1829
1830         /**
1831          * Turn off regular page output and return an error reponse
1832          * for when rate limiting has triggered.
1833          */
1834         public function rateLimited() {
1835
1836                 $this->setPageTitle(wfMsg('actionthrottled'));
1837                 $this->setRobotPolicy( 'noindex,follow' );
1838                 $this->setArticleRelated( false );
1839                 $this->enableClientCache( false );
1840                 $this->mRedirect = '';
1841                 $this->clearHTML();
1842                 $this->setStatusCode(503);
1843                 $this->addWikiMsg( 'actionthrottledtext' );
1844
1845                 $this->returnToMain( null, $this->getTitle() );
1846         }
1847
1848         /**
1849          * Show an "add new section" link?
1850          *
1851          * @return bool
1852          */
1853         public function showNewSectionLink() {
1854                 return $this->mNewSectionLink;
1855         }
1856
1857         /**
1858         * Forcibly hide the new section link?
1859         *
1860         * @return bool
1861         */
1862         public function forceHideNewSectionLink() {
1863                 return $this->mHideNewSectionLink;
1864         }
1865
1866         /**
1867          * Show a warning about slave lag
1868          *
1869          * If the lag is higher than $wgSlaveLagCritical seconds,
1870          * then the warning is a bit more obvious. If the lag is
1871          * lower than $wgSlaveLagWarning, then no warning is shown.
1872          *
1873          * @param int $lag Slave lag
1874          */
1875         public function showLagWarning( $lag ) {
1876                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1877                 if( $lag >= $wgSlaveLagWarning ) {
1878                         $message = $lag < $wgSlaveLagCritical
1879                                 ? 'lag-warn-normal'
1880                                 : 'lag-warn-high';
1881                         $warning = wfMsgExt( $message, 'parse', $lag );
1882                         $this->addHTML( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1883                 }
1884         }
1885
1886         /**
1887          * Add a wikitext-formatted message to the output.
1888          * This is equivalent to:
1889          *
1890          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
1891          */
1892         public function addWikiMsg( /*...*/ ) {
1893                 $args = func_get_args();
1894                 $name = array_shift( $args );
1895                 $this->addWikiMsgArray( $name, $args );
1896         }
1897
1898         /**
1899          * Add a wikitext-formatted message to the output.
1900          * Like addWikiMsg() except the parameters are taken as an array
1901          * instead of a variable argument list.
1902          *
1903          * $options is passed through to wfMsgExt(), see that function for details.
1904          */
1905         public function addWikiMsgArray( $name, $args, $options = array() ) {
1906                 $options[] = 'parse';
1907                 $text = wfMsgExt( $name, $options, $args );
1908                 $this->addHTML( $text );
1909         }
1910
1911         /**
1912          * This function takes a number of message/argument specifications, wraps them in
1913          * some overall structure, and then parses the result and adds it to the output.
1914          *
1915          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
1916          * on. The subsequent arguments may either be strings, in which case they are the
1917          * message names, or arrays, in which case the first element is the message name,
1918          * and subsequent elements are the parameters to that message.
1919          *
1920          * The special named parameter 'options' in a message specification array is passed
1921          * through to the $options parameter of wfMsgExt().
1922          *
1923          * Don't use this for messages that are not in users interface language.
1924          *
1925          * For example:
1926          *
1927          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
1928          *
1929          * Is equivalent to:
1930          *
1931          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
1932          */
1933         public function wrapWikiMsg( $wrap /*, ...*/ ) {
1934                 $msgSpecs = func_get_args();
1935                 array_shift( $msgSpecs );
1936                 $msgSpecs = array_values( $msgSpecs );
1937                 $s = $wrap;
1938                 foreach ( $msgSpecs as $n => $spec ) {
1939                         $options = array();
1940                         if ( is_array( $spec ) ) {
1941                                 $args = $spec;
1942                                 $name = array_shift( $args );
1943                                 if ( isset( $args['options'] ) ) {
1944                                         $options = $args['options'];
1945                                         unset( $args['options'] );
1946                                 }
1947                         }  else {
1948                                 $args = array();
1949                                 $name = $spec;
1950                         }
1951                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
1952                 }
1953                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
1954         }
1955 }