includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mCategories = array(), $mLanguageLinks = array();
  16
  17         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  18         var $mInlineMsg = array();
  19
  20         var $mTemplateIds = array();
  21
  22         var $mAllowUserJs;
  23         var $mSuppressQuickbar = false;
  24         var $mDoNothing = false;
  25         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  26         var $mIsArticleRelated = true;
  27         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  28
  29         var $mFeedLinks = array();
  30
  31         var $mEnableClientCache = true;
  32         var $mArticleBodyOnly = false;
  33
  34         var $mNewSectionLink = false;
  35         var $mHideNewSectionLink = false;
  36         var $mNoGallery = false;
  37         var $mPageTitleActionText = '';
  38         var $mParseWarnings = array();
  39         var $mSquidMaxage = 0;
  40         var $mRevisionId = null;
  41         protected $mTitle = null;
  42
  43         /**
  44          * An array of stylesheet filenames (relative from skins path), with options
  45          * for CSS media, IE conditions, and RTL/LTR direction.
  46          * For internal use; add settings in the skin via $this->addStyle()
  47          */
  48         var $styles = array();
  49
  50         /**
  51          * Whether to load jQuery core.
  52          */
  53         protected $mIncludeJQuery = false;
  54
  55         private $mIndexPolicy = 'index';
  56         private $mFollowPolicy = 'follow';
  57         private $mVaryHeader = array( 'Accept-Encoding' => array('list-contains=gzip'),
  58                                                                   'Cookie' => null );
  59
  60         /**
  61          * Constructor
  62          * Initialise private variables
  63          */
  64         function __construct() {
  65                 global $wgAllowUserJs;
  66                 $this->mAllowUserJs = $wgAllowUserJs;
  67         }
  68
  69         public function redirect( $url, $responsecode = '302' ) {
  70                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  71                 $this->mRedirect = str_replace( "\n", '', $url );
  72                 $this->mRedirectCode = $responsecode;
  73         }
  74
  75         public function getRedirect() {
  76                 return $this->mRedirect;
  77         }
  78
  79         /**
  80          * Set the HTTP status code to send with the output.
  81          *
  82          * @param int $statusCode
  83          * @return nothing
  84          */
  85         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  86
  87         /**
  88          * Add a new <meta> tag
  89          * To add an http-equiv meta tag, precede the name with "http:"
  90          *
  91          * @param $name tag name
  92          * @param $val tag value
  93          */
  94         function addMeta( $name, $val ) {
  95                 array_push( $this->mMetatags, array( $name, $val ) );
  96         }
  97
  98         function addKeyword( $text ) {
  99                 if( is_array( $text )) {
 100                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 101                 } else {
 102                         array_push( $this->mKeywords, $text );
 103                 }
 104         }
 105         function addScript( $script ) {
 106                 $this->mScripts .= $script . "\n";
 107         }
 108
 109         /**
 110          * Register and add a stylesheet from an extension directory.
 111          * @param $url String path to sheet.  Provide either a full url (beginning
 112          *             with 'http', etc) or a relative path from the document root
 113          *             (beginning with '/').  Otherwise it behaves identically to
 114          *             addStyle() and draws from the /skins folder.
 115          */
 116         public function addExtensionStyle( $url ) {
 117                 array_push( $this->mExtStyles, $url );
 118         }
 119
 120         /**
 121          * Add a JavaScript file out of skins/common, or a given relative path.
 122          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 123          */
 124         function addScriptFile( $file ) {
 125                 global $wgStylePath, $wgStyleVersion, $wgJsMimeType;
 126                 if( substr( $file, 0, 1 ) == '/' ) {
 127                         $path = $file;
 128                 } else {
 129                         $path =  "{$wgStylePath}/common/{$file}";
 130                 }
 131                 $this->addScript(
 132                         Xml::element( 'script',
 133                                 array(
 134                                         'type' => $wgJsMimeType,
 135                                         'src' => "$path?$wgStyleVersion",
 136                                 ),
 137                                 '', false
 138                         )
 139                 );
 140         }
 141
 142         /**
 143          * Add a self-contained script tag with the given contents
 144          * @param string $script JavaScript text, no <script> tags
 145          */
 146         function addInlineScript( $script ) {
 147                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 148         }
 149
 150         /**
 151          * Get all registered JS and CSS tags for the header.
 152          */
 153         function getScript() {
 154                 return $this->mScripts . $this->getHeadItems();
 155         }
 156
 157         function getHeadItems() {
 158                 $s = '';
 159                 foreach ( $this->mHeadItems as $item ) {
 160                         $s .= $item;
 161                 }
 162                 return $s;
 163         }
 164
 165         function addHeadItem( $name, $value ) {
 166                 $this->mHeadItems[$name] = $value;
 167         }
 168
 169         function hasHeadItem( $name ) {
 170                 return isset( $this->mHeadItems[$name] );
 171         }
 172
 173         function setETag($tag) { $this->mETag = $tag; }
 174         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 175         function getArticleBodyOnly() { return $this->mArticleBodyOnly; }
 176
 177         function addLink( $linkarr ) {
 178                 # $linkarr should be an associative array of attributes. We'll escape on output.
 179                 array_push( $this->mLinktags, $linkarr );
 180         }
 181
 182         # Get all links added by extensions
 183         function getExtStyle() {
 184                 return $this->mExtStyles;
 185         }
 186
 187         function addMetadataLink( $linkarr ) {
 188                 # note: buggy CC software only reads first "meta" link
 189                 static $haveMeta = false;
 190                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 191                 $this->addLink( $linkarr );
 192                 $haveMeta = true;
 193         }
 194
 195         /**
 196          * checkLastModified tells the client to use the client-cached page if
 197          * possible. If sucessful, the OutputPage is disabled so that
 198          * any future call to OutputPage->output() have no effect.
 199          *
 200          * Side effect: sets mLastModified for Last-Modified header
 201          *
 202          * @return bool True iff cache-ok headers was sent.
 203          */
 204         function checkLastModified( $timestamp ) {
 205                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 206
 207                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 208                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 209                         return false;
 210                 }
 211                 if( !$wgCachePages ) {
 212                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 213                         return false;
 214                 }
 215                 if( $wgUser->getOption( 'nocache' ) ) {
 216                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 217                         return false;
 218                 }
 219
 220                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 221                 $modifiedTimes = array(
 222                         'page' => $timestamp,
 223                         'user' => $wgUser->getTouched(),
 224                         'epoch' => $wgCacheEpoch
 225                 );
 226                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 227
 228                 $maxModified = max( $modifiedTimes );
 229                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 230
 231                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 232                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 233                         return false;
 234                 }
 235
 236                 # Make debug info
 237                 $info = '';
 238                 foreach ( $modifiedTimes as $name => $value ) {
 239                         if ( $info !== '' ) {
 240                                 $info .= ', ';
 241                         }
 242                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 243                 }
 244
 245                 # IE sends sizes after the date like this:
 246                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 247                 # this breaks strtotime().
 248                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 249
 250                 wfSuppressWarnings(); // E_STRICT system time bitching
 251                 $clientHeaderTime = strtotime( $clientHeader );
 252                 wfRestoreWarnings();
 253                 if ( !$clientHeaderTime ) {
 254                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 255                         return false;
 256                 }
 257                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 258
 259                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 260                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 261                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 262                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 263                 if( $clientHeaderTime < $maxModified ) {
 264                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 265                         return false;
 266                 }
 267
 268                 # Not modified
 269                 # Give a 304 response code and disable body output
 270                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 271                 ini_set('zlib.output_compression', 0);
 272                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 273                 $this->sendCacheControl();
 274                 $this->disable();
 275
 276                 // Don't output a compressed blob when using ob_gzhandler;
 277                 // it's technically against HTTP spec and seems to confuse
 278                 // Firefox when the response gets split over two packets.
 279                 wfClearOutputBuffers();
 280
 281                 return true;
 282         }
 283
 284         function setPageTitleActionText( $text ) {
 285                 $this->mPageTitleActionText = $text;
 286         }
 287
 288         function getPageTitleActionText () {
 289                 if ( isset( $this->mPageTitleActionText ) ) {
 290                         return $this->mPageTitleActionText;
 291                 }
 292         }
 293
 294         /**
 295          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 296          *
 297          * @param $policy string The literal string to output as the contents of
 298          *   the meta tag.  Will be parsed according to the spec and output in
 299          *   standardized form.
 300          * @return null
 301          */
 302         public function setRobotPolicy( $policy ) {
 303                 $policy = Article::formatRobotPolicy( $policy );
 304
 305                 if( isset( $policy['index'] ) ){
 306                         $this->setIndexPolicy( $policy['index'] );
 307                 }
 308                 if( isset( $policy['follow'] ) ){
 309                         $this->setFollowPolicy( $policy['follow'] );
 310                 }
 311         }
 312
 313         /**
 314          * Set the index policy for the page, but leave the follow policy un-
 315          * touched.
 316          *
 317          * @param $policy string Either 'index' or 'noindex'.
 318          * @return null
 319          */
 320         public function setIndexPolicy( $policy ) {
 321                 $policy = trim( $policy );
 322                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 323                         $this->mIndexPolicy = $policy;
 324                 }
 325         }
 326
 327         /**
 328          * Set the follow policy for the page, but leave the index policy un-
 329          * touched.
 330          *
 331          * @param $policy string Either 'follow' or 'nofollow'.
 332          * @return null
 333          */
 334         public function setFollowPolicy( $policy ) {
 335                 $policy = trim( $policy );
 336                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 337                         $this->mFollowPolicy = $policy;
 338                 }
 339         }
 340
 341         /**
 342          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 343          */
 344         public function setHTMLTitle( $name ) {
 345                 $this->mHTMLtitle = $name;
 346         }
 347
 348         /**
 349          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 350          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 351          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 352          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 353          */
 354         public function setPageTitle( $name ) {
 355                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 356                 # but leave "<i>foobar</i>" alone
 357                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 358                 $this->mPagetitle = $nameWithTags;
 359
 360                 $taction =  $this->getPageTitleActionText();
 361                 if( !empty( $taction ) ) {
 362                         $name .= ' - '.$taction;
 363                 }
 364
 365                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 366                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 367         }
 368
 369         public function setTitle( $t ) {
 370                 $this->mTitle = $t;
 371         }
 372
 373         public function getTitle() {
 374                 if ( $this->mTitle instanceof Title ) {
 375                         return $this->mTitle;
 376                 }
 377                 else {
 378                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 379                         global $wgTitle;
 380                         return $wgTitle;
 381                 }
 382         }
 383
 384         public function getHTMLTitle() { return $this->mHTMLtitle; }
 385         public function getPageTitle() { return $this->mPagetitle; }
 386         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 387         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 388         public function getSubtitle() { return $this->mSubtitle; }
 389         public function isArticle() { return $this->mIsarticle; }
 390         public function setPrintable() { $this->mPrintable = true; }
 391         public function isPrintable() { return $this->mPrintable; }
 392         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 393         public function disable() { $this->mDoNothing = true; }
 394         public function isDisabled() { return $this->mDoNothing; }
 395
 396         public function setSyndicated( $show = true ) {
 397                 if ( $show ) {
 398                         $this->setFeedAppendQuery( false );
 399                 } else {
 400                         $this->mFeedLinks = array();
 401                 }
 402         }
 403
 404         public function setFeedAppendQuery( $val ) {
 405                 global $wgFeedClasses, $wgAdvertisedFeedTypes;
 406
 407                 $this->mFeedLinks = array();
 408
 409                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 410                         $query = "feed=$type";
 411                         if ( is_string( $val ) ) {
 412                                 $query .= '&' . $val;
 413                         }
 414                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 415                 }
 416         }
 417
 418         public function addFeedLink( $format, $href ) {
 419                 $this->mFeedLinks[$format] = $href;
 420         }
 421
 422         public function isSyndicated() { return count($this->mFeedLinks); }
 423
 424         public function setArticleRelated( $v ) {
 425                 $this->mIsArticleRelated = $v;
 426                 if ( !$v ) {
 427                         $this->mIsarticle = false;
 428                 }
 429         }
 430         public function setArticleFlag( $v ) {
 431                 $this->mIsarticle = $v;
 432                 if ( $v ) {
 433                         $this->mIsArticleRelated = $v;
 434                 }
 435         }
 436
 437         public function isArticleRelated() { return $this->mIsArticleRelated; }
 438
 439         public function getLanguageLinks() { return $this->mLanguageLinks; }
 440         public function addLanguageLinks($newLinkArray) {
 441                 $this->mLanguageLinks += $newLinkArray;
 442         }
 443         public function setLanguageLinks($newLinkArray) {
 444                 $this->mLanguageLinks = $newLinkArray;
 445         }
 446
 447         public function getCategoryLinks() {
 448                 return $this->mCategoryLinks;
 449         }
 450
 451         public function getCategories() {
 452                 return $this->mCategories;
 453         }
 454
 455         /**
 456          * Add an array of categories, with names in the keys
 457          */
 458         public function addCategoryLinks( $categories ) {
 459                 global $wgUser, $wgContLang;
 460
 461                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 462                         return;
 463                 }
 464
 465                 # Add the links to a LinkBatch
 466                 $arr = array( NS_CATEGORY => $categories );
 467                 $lb = new LinkBatch;
 468                 $lb->setArray( $arr );
 469
 470                 # Fetch existence plus the hiddencat property
 471                 $dbr = wfGetDB( DB_SLAVE );
 472                 $pageTable = $dbr->tableName( 'page' );
 473                 $where = $lb->constructSet( 'page', $dbr );
 474                 $propsTable = $dbr->tableName( 'page_props' );
 475                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 476                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 477                 $res = $dbr->query( $sql, __METHOD__ );
 478
 479                 # Add the results to the link cache
 480                 $lb->addResultToCache( LinkCache::singleton(), $res );
 481
 482                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 483                 $categories = array_combine( array_keys( $categories ),
 484                         array_fill( 0, count( $categories ), 'normal' ) );
 485
 486                 # Mark hidden categories
 487                 foreach ( $res as $row ) {
 488                         if ( isset( $row->pp_value ) ) {
 489                                 $categories[$row->page_title] = 'hidden';
 490                         }
 491                 }
 492
 493                 # Add the remaining categories to the skin
 494                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 495                         $sk = $wgUser->getSkin();
 496                         foreach ( $categories as $category => $type ) {
 497                                 $origcategory = $category;
 498                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 499                                 $wgContLang->findVariantLink( $category, $title, true );
 500                                 if ( $category != $origcategory )
 501                                         if ( array_key_exists( $category, $categories ) )
 502                                                 continue;
 503                                 $text = $wgContLang->convertHtml( $title->getText() );
 504                                 $this->mCategories[] = $title->getText();
 505                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 506                         }
 507                 }
 508         }
 509
 510         public function setCategoryLinks($categories) {
 511                 $this->mCategoryLinks = array();
 512                 $this->addCategoryLinks($categories);
 513         }
 514
 515         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 516         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 517
 518         public function disallowUserJs() { $this->mAllowUserJs = false; }
 519         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 520
 521         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 522         public function addHTML( $text ) { $this->mBodytext .= $text; }
 523         public function clearHTML() { $this->mBodytext = ''; }
 524         public function getHTML() { return $this->mBodytext; }
 525         public function debug( $text ) { $this->mDebugtext .= $text; }
 526
 527         /* @deprecated */
 528         public function setParserOptions( $options ) {
 529                 wfDeprecated( __METHOD__ );
 530                 return $this->parserOptions( $options );
 531         }
 532
 533         public function parserOptions( $options = null ) {
 534                 if ( !$this->mParserOptions ) {
 535                         $this->mParserOptions = new ParserOptions;
 536                 }
 537                 return wfSetVar( $this->mParserOptions, $options );
 538         }
 539
 540         /**
 541          * Set the revision ID which will be seen by the wiki text parser
 542          * for things such as embedded {{REVISIONID}} variable use.
 543          * @param mixed $revid an integer, or NULL
 544          * @return mixed previous value
 545          */
 546         public function setRevisionId( $revid ) {
 547                 $val = is_null( $revid ) ? null : intval( $revid );
 548                 return wfSetVar( $this->mRevisionId, $val );
 549         }
 550
 551         public function getRevisionId() {
 552                 return $this->mRevisionId;
 553         }
 554
 555         /**
 556          * Convert wikitext to HTML and add it to the buffer
 557          * Default assumes that the current page title will
 558          * be used.
 559          *
 560          * @param string $text
 561          * @param bool   $linestart
 562          */
 563         public function addWikiText( $text, $linestart = true ) {
 564                 $title = $this->getTitle(); // Work arround E_STRICT
 565                 $this->addWikiTextTitle( $text, $title, $linestart );
 566         }
 567
 568         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 569                 $this->addWikiTextTitle($text, $title, $linestart);
 570         }
 571
 572         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 573                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 574         }
 575
 576         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 577                 global $wgParser;
 578
 579                 wfProfileIn( __METHOD__ );
 580
 581                 wfIncrStats( 'pcache_not_possible' );
 582
 583                 $popts = $this->parserOptions();
 584                 $oldTidy = $popts->setTidy( $tidy );
 585
 586                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 587                         $linestart, true, $this->mRevisionId );
 588
 589                 $popts->setTidy( $oldTidy );
 590
 591                 $this->addParserOutput( $parserOutput );
 592
 593                 wfProfileOut( __METHOD__ );
 594         }
 595
 596         /**
 597          * @todo document
 598          * @param ParserOutput object &$parserOutput
 599          */
 600         public function addParserOutputNoText( &$parserOutput ) {
 601                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 602
 603                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 604                 $this->addCategoryLinks( $parserOutput->getCategories() );
 605                 $this->mNewSectionLink = $parserOutput->getNewSection();
 606                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 607
 608                 $this->mParseWarnings = $parserOutput->getWarnings();
 609                 if ( $parserOutput->getCacheTime() == -1 ) {
 610                         $this->enableClientCache( false );
 611                 }
 612                 $this->mNoGallery = $parserOutput->getNoGallery();
 613                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
 614                 // Versioning...
 615                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 616                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 617                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 618                         } else {
 619                                 $this->mTemplateIds[$ns] = $dbks;
 620                         }
 621                 }
 622                 // Page title
 623                 $title = $parserOutput->getTitleText();
 624                 if ( $title != '' ) {
 625                         $this->setPageTitle( $title );
 626                 }
 627
 628                 // Hooks registered in the object
 629                 global $wgParserOutputHooks;
 630                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 631                         list( $hookName, $data ) = $hookInfo;
 632                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 633                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 634                         }
 635                 }
 636
 637                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 638         }
 639
 640         /**
 641          * @todo document
 642          * @param ParserOutput &$parserOutput
 643          */
 644         function addParserOutput( &$parserOutput ) {
 645                 $this->addParserOutputNoText( $parserOutput );
 646                 $text = $parserOutput->getText();
 647                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 648                 $this->addHTML( $text );
 649         }
 650
 651         /**
 652          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 653          * Saves the text into the parser cache if possible.
 654          *
 655          * @param string  $text
 656          * @param Article $article
 657          * @param bool    $cache
 658          * @deprecated Use Article::outputWikitext
 659          */
 660         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 661                 global $wgParser;
 662
 663                 wfDeprecated( __METHOD__ );
 664
 665                 $popts = $this->parserOptions();
 666                 $popts->setTidy(true);
 667                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 668                         $popts, true, true, $this->mRevisionId );
 669                 $popts->setTidy(false);
 670                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 671                         $parserCache = ParserCache::singleton();
 672                         $parserCache->save( $parserOutput, $article, $popts);
 673                 }
 674
 675                 $this->addParserOutput( $parserOutput );
 676         }
 677
 678         /**
 679          * @deprecated use addWikiTextTidy()
 680          */
 681         public function addSecondaryWikiText( $text, $linestart = true ) {
 682                 wfDeprecated( __METHOD__ );
 683                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 684         }
 685
 686         /**
 687          * Add wikitext with tidy enabled
 688          */
 689         public function addWikiTextTidy(  $text, $linestart = true ) {
 690                 $title = $this->getTitle();
 691                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 692         }
 693
 694
 695         /**
 696          * Add the output of a QuickTemplate to the output buffer
 697          *
 698          * @param QuickTemplate $template
 699          */
 700         public function addTemplate( &$template ) {
 701                 ob_start();
 702                 $template->execute();
 703                 $this->addHTML( ob_get_contents() );
 704                 ob_end_clean();
 705         }
 706
 707         /**
 708          * Parse wikitext and return the HTML.
 709          *
 710          * @param string $text
 711          * @param bool   $linestart Is this the start of a line?
 712          * @param bool   $interface ??
 713          */
 714         public function parse( $text, $linestart = true, $interface = false ) {
 715                 global $wgParser;
 716                 if( is_null( $this->getTitle() ) ) {
 717                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 718                 }
 719                 $popts = $this->parserOptions();
 720                 if ( $interface) { $popts->setInterfaceMessage(true); }
 721                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 722                         $linestart, true, $this->mRevisionId );
 723                 if ( $interface) { $popts->setInterfaceMessage(false); }
 724                 return $parserOutput->getText();
 725         }
 726
 727         /** Parse wikitext, strip paragraphs, and return the HTML. */
 728         public function parseInline( $text, $linestart = true, $interface = false ) {
 729                 $parsed = $this->parse( $text, $linestart, $interface );
 730
 731                 $m = array();
 732                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 733                         $parsed = $m[1];
 734                 }
 735
 736                 return $parsed;
 737         }
 738
 739         /**
 740          * @param Article $article
 741          * @param User    $user
 742          *
 743          * @deprecated
 744          *
 745          * @return bool True if successful, else false.
 746          */
 747         public function tryParserCache( &$article ) {
 748                 wfDeprecated( __METHOD__ );
 749                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 750
 751                 if ($parserOutput !== false) {
 752                         $this->addParserOutput( $parserOutput );
 753                         return true;
 754                 } else {
 755                         return false;
 756                 }
 757         }
 758
 759         /**
 760          * @param int $maxage Maximum cache time on the Squid, in seconds.
 761          */
 762         public function setSquidMaxage( $maxage ) {
 763                 $this->mSquidMaxage = $maxage;
 764         }
 765
 766         /**
 767          * Use enableClientCache(false) to force it to send nocache headers
 768          * @param $state ??
 769          */
 770         public function enableClientCache( $state ) {
 771                 return wfSetVar( $this->mEnableClientCache, $state );
 772         }
 773
 774         function getCacheVaryCookies() {
 775                 global $wgCookiePrefix, $wgCacheVaryCookies;
 776                 static $cookies;
 777                 if ( $cookies === null ) {
 778                         $cookies = array_merge(
 779                                 array(
 780                                         "{$wgCookiePrefix}Token",
 781                                         "{$wgCookiePrefix}LoggedOut",
 782                                         session_name()
 783                                 ),
 784                                 $wgCacheVaryCookies
 785                         );
 786                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 787                 }
 788                 return $cookies;
 789         }
 790
 791         function uncacheableBecauseRequestVars() {
 792                 global $wgRequest;
 793                 return  $wgRequest->getText('useskin', false) === false
 794                         && $wgRequest->getText('uselang', false) === false;
 795         }
 796
 797         /**
 798          * Check if the request has a cache-varying cookie header
 799          * If it does, it's very important that we don't allow public caching
 800          */
 801         function haveCacheVaryCookies() {
 802                 global $wgRequest;
 803                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 804                 if ( $cookieHeader === false ) {
 805                         return false;
 806                 }
 807                 $cvCookies = $this->getCacheVaryCookies();
 808                 foreach ( $cvCookies as $cookieName ) {
 809                         # Check for a simple string match, like the way squid does it
 810                         if ( strpos( $cookieHeader, $cookieName ) ) {
 811                                 wfDebug( __METHOD__.": found $cookieName\n" );
 812                                 return true;
 813                         }
 814                 }
 815                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 816                 return false;
 817         }
 818
 819         public function addVaryHeader( $header, $option = null ) {
 820                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
 821                         $this->mVaryHeader[$header] = $option;
 822                 }
 823                 elseif( is_array( $option ) ) {
 824                         if( is_array( $this->mVaryHeader[$header] ) ) {
 825                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
 826                         }
 827                         else {
 828                                 $this->mVaryHeader[$header] = $option;
 829                         }
 830                 }
 831                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
 832         }
 833
 834         /** Get a complete X-Vary-Options header */
 835         public function getXVO() {
 836                 $cvCookies = $this->getCacheVaryCookies();
 837
 838                 $cookiesOption = array();
 839                 foreach ( $cvCookies as $cookieName ) {
 840                         $cookiesOption[] = 'string-contains=' . $cookieName;
 841                 }
 842                 $this->addVaryHeader( 'Cookie', $cookiesOption );
 843
 844                 $headers = array();
 845                 foreach( $this->mVaryHeader as $header => $option ) {
 846                         $newheader = $header;
 847                         if( is_array( $option ) )
 848                                 $newheader .= ';' . implode( ';', $option );
 849                         $headers[] = $newheader;
 850                 }
 851                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
 852
 853                 return $xvo;
 854         }
 855
 856         /** bug 21672: Add Accept-Language to Vary and XVO headers
 857                 if there's no 'variant' parameter existed in GET.
 858
 859                 For example:
 860                  /w/index.php?title=Main_page should always be served; but
 861                  /w/index.php?title=Main_page&variant=zh-cn should never be served.
 862
 863                 patched by Liangent and Philip */
 864         function addAcceptLanguage() {
 865                 global $wgRequest, $wgContLang;
 866                 if( !$wgRequest->getCheck('variant') && $wgContLang->hasVariants() ) {
 867                         $variants = $wgContLang->getVariants();
 868                         $aloption = array();
 869                         foreach ( $variants as $variant ) {
 870                                 if( $variant === $wgContLang->getCode() )
 871                                         continue;
 872                                 else
 873                                         $aloption[] = "string-contains=$variant";
 874                         }
 875                         $this->addVaryHeader( 'Accept-Language', $aloption );
 876                 }
 877         }
 878
 879         public function sendCacheControl() {
 880                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 881
 882                 $response = $wgRequest->response();
 883                 if ($wgUseETag && $this->mETag)
 884                         $response->header("ETag: $this->mETag");
 885
 886                 $this->addAcceptLanguage();
 887
 888                 # don't serve compressed data to clients who can't handle it
 889                 # maintain different caches for logged-in users and non-logged in ones
 890                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
 891
 892                 if ( $wgUseXVO ) {
 893                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 894                         $response->header( $this->getXVO() );
 895                 }
 896
 897                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 898                         if( $wgUseSquid && session_id() == '' &&
 899                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 900                         {
 901                                 if ( $wgUseESI ) {
 902                                         # We'll purge the proxy cache explicitly, but require end user agents
 903                                         # to revalidate against the proxy on each visit.
 904                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 905                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 906                                         # start with a shorter timeout for initial testing
 907                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 908                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 909                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 910                                 } else {
 911                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 912                                         # to revalidate against the proxy on each visit.
 913                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 914                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 915                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 916                                         # start with a shorter timeout for initial testing
 917                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 918                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 919                                 }
 920                         } else {
 921                                 # We do want clients to cache if they can, but they *must* check for updates
 922                                 # on revisiting the page.
 923                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 924                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 925                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 926                         }
 927                         if($this->mLastModified) {
 928                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 929                         }
 930                 } else {
 931                         wfDebug( __METHOD__ . ": no caching **\n", false );
 932
 933                         # In general, the absence of a last modified header should be enough to prevent
 934                         # the client from using its cache. We send a few other things just to make sure.
 935                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 936                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 937                         $response->header( 'Pragma: no-cache' );
 938                 }
 939                 wfRunHooks('CacheHeadersAfterSet', array( $this ) );
 940         }
 941
 942         /**
 943          * Get the message associed with the HTTP response code $code
 944          *
 945          * @param $code Integer: status code
 946          * @return String or null: message or null if $code is not in the list of
 947          *         messages
 948          */
 949         public static function getStatusMessage( $code ) {
 950                 static $statusMessage = array(
 951                         100 => 'Continue',
 952                         101 => 'Switching Protocols',
 953                         102 => 'Processing',
 954                         200 => 'OK',
 955                         201 => 'Created',
 956                         202 => 'Accepted',
 957                         203 => 'Non-Authoritative Information',
 958                         204 => 'No Content',
 959                         205 => 'Reset Content',
 960                         206 => 'Partial Content',
 961                         207 => 'Multi-Status',
 962                         300 => 'Multiple Choices',
 963                         301 => 'Moved Permanently',
 964                         302 => 'Found',
 965                         303 => 'See Other',
 966                         304 => 'Not Modified',
 967                         305 => 'Use Proxy',
 968                         307 => 'Temporary Redirect',
 969                         400 => 'Bad Request',
 970                         401 => 'Unauthorized',
 971                         402 => 'Payment Required',
 972                         403 => 'Forbidden',
 973                         404 => 'Not Found',
 974                         405 => 'Method Not Allowed',
 975                         406 => 'Not Acceptable',
 976                         407 => 'Proxy Authentication Required',
 977                         408 => 'Request Timeout',
 978                         409 => 'Conflict',
 979                         410 => 'Gone',
 980                         411 => 'Length Required',
 981                         412 => 'Precondition Failed',
 982                         413 => 'Request Entity Too Large',
 983                         414 => 'Request-URI Too Large',
 984                         415 => 'Unsupported Media Type',
 985                         416 => 'Request Range Not Satisfiable',
 986                         417 => 'Expectation Failed',
 987                         422 => 'Unprocessable Entity',
 988                         423 => 'Locked',
 989                         424 => 'Failed Dependency',
 990                         500 => 'Internal Server Error',
 991                         501 => 'Not Implemented',
 992                         502 => 'Bad Gateway',
 993                         503 => 'Service Unavailable',
 994                         504 => 'Gateway Timeout',
 995                         505 => 'HTTP Version Not Supported',
 996                         507 => 'Insufficient Storage'
 997                 );
 998                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
 999         }
1000
1001         /**
1002          * Finally, all the text has been munged and accumulated into
1003          * the object, let's actually output it:
1004          */
1005         public function output() {
1006                 global $wgUser, $wgOutputEncoding, $wgRequest;
1007                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1008                 global $wgUseAjax, $wgAjaxWatch;
1009                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1010                 global $wgArticle;
1011
1012                 if( $this->mDoNothing ){
1013                         return;
1014                 }
1015                 wfProfileIn( __METHOD__ );
1016                 if ( $this->mRedirect != '' ) {
1017                         # Standards require redirect URLs to be absolute
1018                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1019                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1020                                 if( !$wgDebugRedirects ) {
1021                                         $message = self::getStatusMessage( $this->mRedirectCode );
1022                                         $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1023                                 }
1024                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1025                         }
1026                         $this->sendCacheControl();
1027
1028                         $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
1029                         if( $wgDebugRedirects ) {
1030                                 $url = htmlspecialchars( $this->mRedirect );
1031                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1032                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1033                                 print "</body>\n</html>\n";
1034                         } else {
1035                                 $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
1036                         }
1037                         wfProfileOut( __METHOD__ );
1038                         return;
1039                 } elseif ( $this->mStatusCode ) {
1040                         $message = self::getStatusMessage( $this->mStatusCode );
1041                         if ( $message )
1042                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1043                 }
1044
1045                 $sk = $wgUser->getSkin();
1046
1047                 if ( $wgUseAjax ) {
1048                         $this->addScriptFile( 'ajax.js' );
1049
1050                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1051
1052                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1053                                 $this->addScriptFile( 'ajaxwatch.js' );
1054                         }
1055
1056                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1057                                 $this->addScriptFile( 'mwsuggest.js' );
1058                         }
1059                 }
1060
1061                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1062                         $this->addScriptFile( 'rightclickedit.js' );
1063                 }
1064
1065                 if( $wgUniversalEditButton ) {
1066                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1067                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1068                                 // Original UniversalEditButton
1069                                 $msg = wfMsg('edit');
1070                                 $this->addLink( array(
1071                                         'rel' => 'alternate',
1072                                         'type' => 'application/x-wiki',
1073                                         'title' => $msg,
1074                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1075                                 ) );
1076                                 // Alternate edit link
1077                                 $this->addLink( array(
1078                                         'rel' => 'edit',
1079                                         'title' => $msg,
1080                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1081                                 ) );
1082                         }
1083                 }
1084
1085                 # Buffer output; final headers may depend on later processing
1086                 ob_start();
1087
1088                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1089                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1090
1091                 if ($this->mArticleBodyOnly) {
1092                         $this->out($this->mBodytext);
1093                 } else {
1094                         // Hook that allows last minute changes to the output page, e.g.
1095                         // adding of CSS or Javascript by extensions.
1096                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1097
1098                         wfProfileIn( 'Output-skin' );
1099                         $sk->outputPage( $this );
1100                         wfProfileOut( 'Output-skin' );
1101                 }
1102
1103                 $this->sendCacheControl();
1104                 ob_end_flush();
1105                 wfProfileOut( __METHOD__ );
1106         }
1107
1108         /**
1109          * Actually output something with print(). Performs an iconv to the
1110          * output encoding, if needed.
1111          * @param string $ins The string to output
1112          */
1113         public function out( $ins ) {
1114                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1115                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1116                         $outs = $ins;
1117                 } else {
1118                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1119                         if ( false === $outs ) { $outs = $ins; }
1120                 }
1121                 print $outs;
1122         }
1123
1124         /**
1125          * @todo document
1126          */
1127         public static function setEncodings() {
1128                 global $wgInputEncoding, $wgOutputEncoding;
1129                 global $wgContLang;
1130
1131                 $wgInputEncoding = strtolower( $wgInputEncoding );
1132
1133                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1134                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1135                         return;
1136                 }
1137                 $wgOutputEncoding = $wgInputEncoding;
1138         }
1139
1140         /**
1141          * Deprecated, use wfReportTime() instead.
1142          * @return string
1143          * @deprecated
1144          */
1145         public function reportTime() {
1146                 wfDeprecated( __METHOD__ );
1147                 $time = wfReportTime();
1148                 return $time;
1149         }
1150
1151         /**
1152          * Produce a "user is blocked" page.
1153          *
1154          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1155          * @return nothing
1156          */
1157         function blockedPage( $return = true ) {
1158                 global $wgUser, $wgContLang, $wgLang;
1159
1160                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1161                 $this->setRobotPolicy( 'noindex,nofollow' );
1162                 $this->setArticleRelated( false );
1163
1164                 $name = User::whoIs( $wgUser->blockedBy() );
1165                 $reason = $wgUser->blockedFor();
1166                 if( $reason == '' ) {
1167                         $reason = wfMsg( 'blockednoreason' );
1168                 }
1169                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1170                 $ip = wfGetIP();
1171
1172                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1173
1174                 $blockid = $wgUser->mBlock->mId;
1175
1176                 $blockExpiry = $wgUser->mBlock->mExpiry;
1177                 if ( $blockExpiry == 'infinity' ) {
1178                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1179                         // Search for localization in 'ipboptions'
1180                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1181                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1182                                 if ( strpos( $option, ":" ) === false )
1183                                         continue;
1184                                 list( $show, $value ) = explode( ":", $option );
1185                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1186                                         $blockExpiry = $show;
1187                                         break;
1188                                 }
1189                         }
1190                 } else {
1191                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1192                 }
1193
1194                 if ( $wgUser->mBlock->mAuto ) {
1195                         $msg = 'autoblockedtext';
1196                 } else {
1197                         $msg = 'blockedtext';
1198                 }
1199
1200                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1201                  * This could be a username, an ip range, or a single ip. */
1202                 $intended = $wgUser->mBlock->mAddress;
1203
1204                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1205
1206                 # Don't auto-return to special pages
1207                 if( $return ) {
1208                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1209                         $this->returnToMain( null, $return );
1210                 }
1211         }
1212
1213         /**
1214          * Output a standard error page
1215          *
1216          * @param string $title Message key for page title
1217          * @param string $msg Message key for page text
1218          * @param array $params Message parameters
1219          */
1220         public function showErrorPage( $title, $msg, $params = array() ) {
1221                 if ( $this->getTitle() ) {
1222                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1223                 }
1224                 $this->setPageTitle( wfMsg( $title ) );
1225                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1226                 $this->setRobotPolicy( 'noindex,nofollow' );
1227                 $this->setArticleRelated( false );
1228                 $this->enableClientCache( false );
1229                 $this->mRedirect = '';
1230                 $this->mBodytext = '';
1231
1232                 array_unshift( $params, 'parse' );
1233                 array_unshift( $params, $msg );
1234                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1235
1236                 $this->returnToMain();
1237         }
1238
1239         /**
1240          * Output a standard permission error page
1241          *
1242          * @param array $errors Error message keys
1243          */
1244         public function showPermissionsErrorPage( $errors, $action = null )
1245         {
1246                 $this->mDebugtext .= 'Original title: ' .
1247                 $this->getTitle()->getPrefixedText() . "\n";
1248                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1249                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1250                 $this->setRobotPolicy( 'noindex,nofollow' );
1251                 $this->setArticleRelated( false );
1252                 $this->enableClientCache( false );
1253                 $this->mRedirect = '';
1254                 $this->mBodytext = '';
1255                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1256         }
1257
1258         /** @deprecated */
1259         public function errorpage( $title, $msg ) {
1260                 wfDeprecated( __METHOD__ );
1261                 throw new ErrorPageError( $title, $msg );
1262         }
1263
1264         /**
1265          * Display an error page indicating that a given version of MediaWiki is
1266          * required to use it
1267          *
1268          * @param mixed $version The version of MediaWiki needed to use the page
1269          */
1270         public function versionRequired( $version ) {
1271                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1272                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1273                 $this->setRobotPolicy( 'noindex,nofollow' );
1274                 $this->setArticleRelated( false );
1275                 $this->mBodytext = '';
1276
1277                 $this->addWikiMsg( 'versionrequiredtext', $version );
1278                 $this->returnToMain();
1279         }
1280
1281         /**
1282          * Display an error page noting that a given permission bit is required.
1283          *
1284          * @param string $permission key required
1285          */
1286         public function permissionRequired( $permission ) {
1287                 global $wgLang;
1288
1289                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1290                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1291                 $this->setRobotPolicy( 'noindex,nofollow' );
1292                 $this->setArticleRelated( false );
1293                 $this->mBodytext = '';
1294
1295                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1296                         User::getGroupsWithPermission( $permission ) );
1297                 if( $groups ) {
1298                         $this->addWikiMsg( 'badaccess-groups',
1299                                 $wgLang->commaList( $groups ),
1300                                 count( $groups) );
1301                 } else {
1302                         $this->addWikiMsg( 'badaccess-group0' );
1303                 }
1304                 $this->returnToMain();
1305         }
1306
1307         /**
1308          * Use permissionRequired.
1309          * @deprecated
1310          */
1311         public function sysopRequired() {
1312                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1313         }
1314
1315         /**
1316          * Use permissionRequired.
1317          * @deprecated
1318          */
1319         public function developerRequired() {
1320                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1321         }
1322
1323         /**
1324          * Produce the stock "please login to use the wiki" page
1325          */
1326         public function loginToUse() {
1327                 global $wgUser, $wgContLang;
1328
1329                 if( $wgUser->isLoggedIn() ) {
1330                         $this->permissionRequired( 'read' );
1331                         return;
1332                 }
1333
1334                 $skin = $wgUser->getSkin();
1335
1336                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1337                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1338                 $this->setRobotPolicy( 'noindex,nofollow' );
1339                 $this->setArticleFlag( false );
1340
1341                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1342                 $loginLink = $skin->link(
1343                         $loginTitle,
1344                         wfMsgHtml( 'loginreqlink' ),
1345                         array(),
1346                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1347                         array( 'known', 'noclasses' )
1348                 );
1349                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1350                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1351
1352                 # Don't return to the main page if the user can't read it
1353                 # otherwise we'll end up in a pointless loop
1354                 $mainPage = Title::newMainPage();
1355                 if( $mainPage->userCanRead() )
1356                         $this->returnToMain( null, $mainPage );
1357         }
1358
1359         /** @deprecated */
1360         public function databaseError( $fname, $sql, $error, $errno ) {
1361                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1362         }
1363
1364         /**
1365          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1366          * @return string The wikitext error-messages, formatted into a list.
1367          */
1368         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1369                 if ($action == null) {
1370                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1371                 } else {
1372                         global $wgLang;
1373                         $action_desc = wfMsgNoTrans( "action-$action" );
1374                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1375                 }
1376
1377                 if (count( $errors ) > 1) {
1378                         $text .= '<ul class="permissions-errors">' . "\n";
1379
1380                         foreach( $errors as $error )
1381                         {
1382                                 $text .= '<li>';
1383                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1384                                 $text .= "</li>\n";
1385                         }
1386                         $text .= '</ul>';
1387                 } else {
1388                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1389                 }
1390
1391                 return $text;
1392         }
1393
1394         /**
1395          * Display a page stating that the Wiki is in read-only mode,
1396          * and optionally show the source of the page that the user
1397          * was trying to edit.  Should only be called (for this
1398          * purpose) after wfReadOnly() has returned true.
1399          *
1400          * For historical reasons, this function is _also_ used to
1401          * show the error message when a user tries to edit a page
1402          * they are not allowed to edit.  (Unless it's because they're
1403          * blocked, then we show blockedPage() instead.)  In this
1404          * case, the second parameter should be set to true and a list
1405          * of reasons supplied as the third parameter.
1406          *
1407          * @todo Needs to be split into multiple functions.
1408          *
1409          * @param string $source    Source code to show (or null).
1410          * @param bool   $protected Is this a permissions error?
1411          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1412          */
1413         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1414                 global $wgUser;
1415                 $skin = $wgUser->getSkin();
1416
1417                 $this->setRobotPolicy( 'noindex,nofollow' );
1418                 $this->setArticleRelated( false );
1419
1420                 // If no reason is given, just supply a default "I can't let you do
1421                 // that, Dave" message.  Should only occur if called by legacy code.
1422                 if ( $protected && empty($reasons) ) {
1423                         $reasons[] = array( 'badaccess-group0' );
1424                 }
1425
1426                 if ( !empty($reasons) ) {
1427                         // Permissions error
1428                         if( $source ) {
1429                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1430                                 $this->setSubtitle(
1431                                         wfMsg(
1432                                                 'viewsourcefor',
1433                                                 $skin->link(
1434                                                         $this->getTitle(),
1435                                                         null,
1436                                                         array(),
1437                                                         array(),
1438                                                         array( 'known', 'noclasses' )
1439                                                 )
1440                                         )
1441                                 );
1442                         } else {
1443                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1444                         }
1445                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1446                 } else {
1447                         // Wiki is read only
1448                         $this->setPageTitle( wfMsg( 'readonly' ) );
1449                         $reason = wfReadOnlyReason();
1450                         $this->wrapWikiMsg( '<div class="mw-readonly-error">\n$1</div>', array( 'readonlytext', $reason ) );
1451                 }
1452
1453                 // Show source, if supplied
1454                 if( is_string( $source ) ) {
1455                         $this->addWikiMsg( 'viewsourcetext' );
1456
1457                         $params = array(
1458                                 'id'   => 'wpTextbox1',
1459                                 'name' => 'wpTextbox1',
1460                                 'cols' => $wgUser->getOption( 'cols' ),
1461                                 'rows' => $wgUser->getOption( 'rows' ),
1462                                 'readonly' => 'readonly'
1463                         );
1464                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1465
1466                         // Show templates used by this article
1467                         $skin = $wgUser->getSkin();
1468                         $article = new Article( $this->getTitle() );
1469                         $this->addHTML( "<div class='templatesUsed'>
1470 {$skin->formatTemplates( $article->getUsedTemplates() )}
1471 </div>
1472 " );
1473                 }
1474
1475                 # If the title doesn't exist, it's fairly pointless to print a return
1476                 # link to it.  After all, you just tried editing it and couldn't, so
1477                 # what's there to do there?
1478                 if( $this->getTitle()->exists() ) {
1479                         $this->returnToMain( null, $this->getTitle() );
1480                 }
1481         }
1482
1483         /** @deprecated */
1484         public function fatalError( $message ) {
1485                 wfDeprecated( __METHOD__ );
1486                 throw new FatalError( $message );
1487         }
1488
1489         /** @deprecated */
1490         public function unexpectedValueError( $name, $val ) {
1491                 wfDeprecated( __METHOD__ );
1492                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1493         }
1494
1495         /** @deprecated */
1496         public function fileCopyError( $old, $new ) {
1497                 wfDeprecated( __METHOD__ );
1498                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1499         }
1500
1501         /** @deprecated */
1502         public function fileRenameError( $old, $new ) {
1503                 wfDeprecated( __METHOD__ );
1504                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1505         }
1506
1507         /** @deprecated */
1508         public function fileDeleteError( $name ) {
1509                 wfDeprecated( __METHOD__ );
1510                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1511         }
1512
1513         /** @deprecated */
1514         public function fileNotFoundError( $name ) {
1515                 wfDeprecated( __METHOD__ );
1516                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1517         }
1518
1519         public function showFatalError( $message ) {
1520                 $this->setPageTitle( wfMsg( "internalerror" ) );
1521                 $this->setRobotPolicy( "noindex,nofollow" );
1522                 $this->setArticleRelated( false );
1523                 $this->enableClientCache( false );
1524                 $this->mRedirect = '';
1525                 $this->mBodytext = $message;
1526         }
1527
1528         public function showUnexpectedValueError( $name, $val ) {
1529                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1530         }
1531
1532         public function showFileCopyError( $old, $new ) {
1533                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1534         }
1535
1536         public function showFileRenameError( $old, $new ) {
1537                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1538         }
1539
1540         public function showFileDeleteError( $name ) {
1541                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1542         }
1543
1544         public function showFileNotFoundError( $name ) {
1545                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1546         }
1547
1548         /**
1549          * Add a "return to" link pointing to a specified title
1550          *
1551          * @param $title Title to link
1552          * @param $query String: query string
1553          */
1554         public function addReturnTo( $title, $query = array() ) {
1555                 global $wgUser;
1556                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1557                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1558                         $title, null, array(), $query ) );
1559                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1560         }
1561
1562         /**
1563          * Add a "return to" link pointing to a specified title,
1564          * or the title indicated in the request, or else the main page
1565          *
1566          * @param $unused No longer used
1567          * @param $returnto Title or String to return to
1568          * @param $returntoquery String: query string for the return to link
1569          */
1570         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1571                 global $wgRequest;
1572
1573                 if ( $returnto == null ) {
1574                         $returnto = $wgRequest->getText( 'returnto' );
1575                 }
1576
1577                 if ( $returntoquery == null ) {
1578                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1579                 }
1580
1581                 if ( $returnto === '' ) {
1582                         $returnto = Title::newMainPage();
1583                 }
1584
1585                 if ( is_object( $returnto ) ) {
1586                         $titleObj = $returnto;
1587                 } else {
1588                         $titleObj = Title::newFromText( $returnto );
1589                 }
1590                 if ( !is_object( $titleObj ) ) {
1591                         $titleObj = Title::newMainPage();
1592                 }
1593
1594                 $this->addReturnTo( $titleObj, $returntoquery );
1595         }
1596
1597         /**
1598          * @return string The doctype, opening <html>, and head element.
1599          *
1600          * @param $sk Skin The given Skin
1601          */
1602         public function headElement( Skin $sk, $includeStyle = true ) {
1603                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1604                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces, $wgHtml5Version;
1605                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgHtml5, $wgWellFormedXml;
1606                 global $wgUser, $wgRequest, $wgLang;
1607
1608                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1609                 if ( $sk->commonPrintStylesheet() ) {
1610                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1611                 }
1612                 $sk->setupUserCss( $this );
1613
1614                 $ret = '';
1615
1616                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1617                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1618                 }
1619
1620                 if ( $this->getHTMLTitle() == '' ) {
1621                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1622                 }
1623
1624                 $dir = $wgContLang->getDir();
1625
1626                 if ( $wgHtml5 ) {
1627                         if ( $wgWellFormedXml ) {
1628                                 # Unknown elements and attributes are okay in XML, but unknown
1629                                 # named entities are well-formedness errors and will break XML
1630                                 # parsers.  Thus we need a doctype that gives us appropriate
1631                                 # entity definitions.  The HTML5 spec permits four legacy
1632                                 # doctypes as obsolete but conforming, so let's pick one of
1633                                 # those, although it makes our pages look like XHTML1 Strict.
1634                                 # Isn't compatibility great?
1635                                 $ret .= "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n";
1636                         } else {
1637                                 # Much saner.
1638                                 $ret .= "<!doctype html>\n";
1639                         }
1640                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\" ";
1641                         if ( $wgHtml5Version ) $ret .= " version=\"$wgHtml5Version\" ";
1642                         $ret .= ">\n";
1643                 } else {
1644                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1645                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1646                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1647                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1648                         }
1649                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1650                 }
1651
1652                 $ret .= "<head>\n";
1653                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1654                 $ret .= implode( "\n", array(
1655                         $this->getHeadLinks(),
1656                         $this->buildCssLinks(),
1657                         $this->getHeadScripts( $sk ),
1658                         $this->getHeadItems(),
1659                 ));
1660                 if( $sk->usercss ){
1661                         $ret .= Html::inlineStyle( $sk->usercss );
1662                 }
1663
1664                 if ($wgUseTrackbacks && $this->isArticleRelated())
1665                         $ret .= $this->getTitle()->trackbackRDF();
1666
1667                 $ret .= "</head>\n";
1668
1669                 $bodyAttrs = array();
1670
1671                 # Crazy edit-on-double-click stuff
1672                 $action = $wgRequest->getVal( 'action', 'view' );
1673
1674                 if ( $this->getTitle()->getNamespace() != NS_SPECIAL
1675                 && !in_array( $action, array( 'edit', 'submit' ) )
1676                 && $wgUser->getOption( 'editondblclick' ) ) {
1677                         $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
1678                 }
1679
1680                 # Class bloat
1681                 $bodyAttrs['class'] = "mediawiki $dir";
1682
1683                 if ( $wgLang->capitalizeAllNouns() ) {
1684                         # A <body> class is probably not the best way to do this . . .
1685                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
1686                 }
1687                 $bodyAttrs['class'] .= ' ns-' . $this->getTitle()->getNamespace();
1688                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
1689                         $bodyAttrs['class'] .= ' ns-special';
1690                 } elseif ( $this->getTitle()->isTalkPage() ) {
1691                         $bodyAttrs['class'] .= ' ns-talk';
1692                 } else {
1693                         $bodyAttrs['class'] .= ' ns-subject';
1694                 }
1695                 $bodyAttrs['class'] .= ' ' . Sanitizer::escapeClass( 'page-' . $this->getTitle()->getPrefixedText() );
1696                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $wgUser->getSkin()->getSkinName() );
1697
1698                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
1699
1700                 return $ret;
1701         }
1702
1703         /*
1704          * gets the global variables and mScripts
1705          *
1706          * also adds userjs to the end if enabled:
1707         */
1708         function getHeadScripts( Skin $sk ) {
1709                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1710                 global $wgStylePath, $wgStyleVersion;
1711
1712                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1713                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
1714
1715                 //add site JS if enabled:
1716                 if( $wgUseSiteJs ) {
1717                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
1718                         $this->addScriptFile(  Skin::makeUrl( '-',
1719                                         "action=raw$jsCache&gen=js&useskin=" .
1720                                         urlencode( $sk->getSkinName() )
1721                                         )
1722                                 );
1723                 }
1724
1725                 //add user js if enabled:
1726                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
1727                         $action = $wgRequest->getVal( 'action', 'view' );
1728                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
1729                                 # XXX: additional security check/prompt?
1730                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
1731                         } else {
1732                                 $userpage = $wgUser->getUserPage();
1733                                 $scriptpage = Title::makeTitleSafe(
1734                                         NS_USER,
1735                                         $userpage->getDBkey() . '/' . $sk->getSkinName() . '.js'
1736                                 );
1737                                 if ( $scriptpage && $scriptpage->exists() ) {
1738                                         $userjs = Skin::makeUrl( $scriptpage->getPrefixedText(), 'action=raw&ctype=' . $wgJsMimeType );
1739                                         $this->addScriptFile( $userjs );
1740                                 }
1741                         }
1742                 }
1743
1744                 $scripts .= "\n" . $this->mScripts;
1745                 return $scripts;
1746         }
1747
1748         protected function addDefaultMeta() {
1749                 global $wgVersion, $wgHtml5;
1750
1751                 static $called = false;
1752                 if ( $called ) {
1753                         # Don't run this twice
1754                         return;
1755                 }
1756                 $called = true;
1757
1758                 if ( !$wgHtml5 ) {
1759                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1760                 }
1761                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1762
1763                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1764                 if( $p !== 'index,follow' ) {
1765                         // http://www.robotstxt.org/wc/meta-user.html
1766                         // Only show if it's different from the default robots policy
1767                         $this->addMeta( 'robots', $p );
1768                 }
1769
1770                 if ( count( $this->mKeywords ) > 0 ) {
1771                         $strip = array(
1772                                 "/<.*?" . ">/" => '',
1773                                 "/_/" => ' '
1774                         );
1775                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1776                 }
1777         }
1778
1779         /**
1780          * @return string HTML tag links to be put in the header.
1781          */
1782         public function getHeadLinks() {
1783                 global $wgRequest, $wgFeed;
1784
1785                 // Ideally this should happen earlier, somewhere. :P
1786                 $this->addDefaultMeta();
1787
1788                 $tags = array();
1789
1790                 foreach ( $this->mMetatags as $tag ) {
1791                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1792                                 $a = 'http-equiv';
1793                                 $tag[0] = substr( $tag[0], 5 );
1794                         } else {
1795                                 $a = 'name';
1796                         }
1797                         $tags[] = Html::element( 'meta',
1798                                 array(
1799                                         $a => $tag[0],
1800                                         'content' => $tag[1] ) );
1801                 }
1802                 foreach ( $this->mLinktags as $tag ) {
1803                         $tags[] = Html::element( 'link', $tag );
1804                 }
1805
1806                 if( $wgFeed ) {
1807                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1808                                 # Use the page name for the title (accessed through $wgTitle since
1809                                 # there's no other way).  In principle, this could lead to issues
1810                                 # with having the same name for different feeds corresponding to
1811                                 # the same page, but we can't avoid that at this low a level.
1812
1813                                 $tags[] = $this->feedLink(
1814                                         $format,
1815                                         $link,
1816                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1817                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) );
1818                         }
1819
1820                         # Recent changes feed should appear on every page (except recentchanges,
1821                         # that would be redundant). Put it after the per-page feed to avoid
1822                         # changing existing behavior. It's still available, probably via a
1823                         # menu in your browser. Some sites might have a different feed they'd
1824                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1825                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1826                         # If so, use it instead.
1827
1828                         global $wgOverrideSiteFeed, $wgSitename, $wgFeedClasses, $wgAdvertisedFeedTypes;
1829                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1830
1831                         if ( $wgOverrideSiteFeed ) {
1832                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1833                                         $tags[] = $this->feedLink (
1834                                                 $type,
1835                                                 htmlspecialchars( $feedUrl ),
1836                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1837                                 }
1838                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1839                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
1840                                         $tags[] = $this->feedLink(
1841                                                 $format,
1842                                                 $rctitle->getLocalURL( "feed={$format}" ),
1843                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1844                                 }
1845                         }
1846                 }
1847
1848                 return implode( "\n", $tags );
1849         }
1850
1851         /**
1852          * Return URLs for each supported syndication format for this page.
1853          * @return array associating format keys with URLs
1854          */
1855         public function getSyndicationLinks() {
1856                 return $this->mFeedLinks;
1857         }
1858
1859         /**
1860          * Generate a <link rel/> for an RSS feed.
1861          */
1862         private function feedLink( $type, $url, $text ) {
1863                 return Html::element( 'link', array(
1864                         'rel' => 'alternate',
1865                         'type' => "application/$type+xml",
1866                         'title' => $text,
1867                         'href' => $url ) );
1868         }
1869
1870         /**
1871          * Add a local or specified stylesheet, with the given media options.
1872          * Meant primarily for internal use...
1873          *
1874          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1875          * @param $conditional -- for IE conditional comments, specifying an IE version
1876          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1877          */
1878         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1879                 $options = array();
1880                 // Even though we expect the media type to be lowercase, but here we
1881                 // force it to lowercase to be safe.
1882                 if( $media )
1883                         $options['media'] = $media;
1884                 if( $condition )
1885                         $options['condition'] = $condition;
1886                 if( $dir )
1887                         $options['dir'] = $dir;
1888                 $this->styles[$style] = $options;
1889         }
1890
1891         /**
1892          * Adds inline CSS styles
1893          * @param $style_css Mixed: inline CSS
1894          */
1895         public function addInlineStyle( $style_css ){
1896                 $this->mScripts .= Html::inlineStyle( $style_css );
1897         }
1898
1899         /**
1900          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1901          * These will be applied to various media & IE conditionals.
1902          */
1903         public function buildCssLinks() {
1904                 $links = array();
1905                 foreach( $this->styles as $file => $options ) {
1906                         $link = $this->styleLink( $file, $options );
1907                         if( $link )
1908                                 $links[] = $link;
1909                 }
1910
1911                 return implode( "\n", $links );
1912         }
1913
1914         protected function styleLink( $style, $options ) {
1915                 global $wgRequest;
1916
1917                 if( isset( $options['dir'] ) ) {
1918                         global $wgContLang;
1919                         $siteDir = $wgContLang->getDir();
1920                         if( $siteDir != $options['dir'] )
1921                                 return '';
1922                 }
1923
1924                 if( isset( $options['media'] ) ) {
1925                         $media = $this->transformCssMedia( $options['media'] );
1926                         if( is_null( $media ) ) {
1927                                 return '';
1928                         }
1929                 } else {
1930                         $media = 'all';
1931                 }
1932
1933                 if( substr( $style, 0, 1 ) == '/' ||
1934                         substr( $style, 0, 5 ) == 'http:' ||
1935                         substr( $style, 0, 6 ) == 'https:' ) {
1936                         $url = $style;
1937                 } else {
1938                         global $wgStylePath, $wgStyleVersion;
1939                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1940                 }
1941
1942                 $link = Html::linkedStyle( $url, $media );
1943
1944                 if( isset( $options['condition'] ) ) {
1945                         $condition = htmlspecialchars( $options['condition'] );
1946                         $link = "<!--[if $condition]>$link<![endif]-->";
1947                 }
1948                 return $link;
1949         }
1950
1951         function transformCssMedia( $media ) {
1952                 global $wgRequest, $wgHandheldForIPhone;
1953
1954                 // Switch in on-screen display for media testing
1955                 $switches = array(
1956                         'printable' => 'print',
1957                         'handheld' => 'handheld',
1958                 );
1959                 foreach( $switches as $switch => $targetMedia ) {
1960                         if( $wgRequest->getBool( $switch ) ) {
1961                                 if( $media == $targetMedia ) {
1962                                         $media = '';
1963                                 } elseif( $media == 'screen' ) {
1964                                         return null;
1965                                 }
1966                         }
1967                 }
1968
1969                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1970                 if( $wgHandheldForIPhone ) {
1971                         $mediaAliases = array(
1972                                 'screen' => 'screen and (min-device-width: 481px)',
1973                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1974                         );
1975
1976                         if( isset( $mediaAliases[$media] ) ) {
1977                                 $media = $mediaAliases[$media];
1978                         }
1979                 }
1980
1981                 return $media;
1982         }
1983
1984         /**
1985          * Turn off regular page output and return an error reponse
1986          * for when rate limiting has triggered.
1987          */
1988         public function rateLimited() {
1989
1990                 $this->setPageTitle(wfMsg('actionthrottled'));
1991                 $this->setRobotPolicy( 'noindex,follow' );
1992                 $this->setArticleRelated( false );
1993                 $this->enableClientCache( false );
1994                 $this->mRedirect = '';
1995                 $this->clearHTML();
1996                 $this->setStatusCode(503);
1997                 $this->addWikiMsg( 'actionthrottledtext' );
1998
1999                 $this->returnToMain( null, $this->getTitle() );
2000         }
2001
2002         /**
2003          * Show an "add new section" link?
2004          *
2005          * @return bool
2006          */
2007         public function showNewSectionLink() {
2008                 return $this->mNewSectionLink;
2009         }
2010
2011         /**
2012         * Forcibly hide the new section link?
2013         *
2014         * @return bool
2015         */
2016         public function forceHideNewSectionLink() {
2017                 return $this->mHideNewSectionLink;
2018         }
2019
2020         /**
2021          * Show a warning about slave lag
2022          *
2023          * If the lag is higher than $wgSlaveLagCritical seconds,
2024          * then the warning is a bit more obvious. If the lag is
2025          * lower than $wgSlaveLagWarning, then no warning is shown.
2026          *
2027          * @param int $lag Slave lag
2028          */
2029         public function showLagWarning( $lag ) {
2030                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
2031                 if( $lag >= $wgSlaveLagWarning ) {
2032                         $message = $lag < $wgSlaveLagCritical
2033                                 ? 'lag-warn-normal'
2034                                 : 'lag-warn-high';
2035                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2036                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2037                 }
2038         }
2039
2040         /**
2041          * Add a wikitext-formatted message to the output.
2042          * This is equivalent to:
2043          *
2044          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2045          */
2046         public function addWikiMsg( /*...*/ ) {
2047                 $args = func_get_args();
2048                 $name = array_shift( $args );
2049                 $this->addWikiMsgArray( $name, $args );
2050         }
2051
2052         /**
2053          * Add a wikitext-formatted message to the output.
2054          * Like addWikiMsg() except the parameters are taken as an array
2055          * instead of a variable argument list.
2056          *
2057          * $options is passed through to wfMsgExt(), see that function for details.
2058          */
2059         public function addWikiMsgArray( $name, $args, $options = array() ) {
2060                 $options[] = 'parse';
2061                 $text = wfMsgExt( $name, $options, $args );
2062                 $this->addHTML( $text );
2063         }
2064
2065         /**
2066          * This function takes a number of message/argument specifications, wraps them in
2067          * some overall structure, and then parses the result and adds it to the output.
2068          *
2069          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2070          * on. The subsequent arguments may either be strings, in which case they are the
2071          * message names, or arrays, in which case the first element is the message name,
2072          * and subsequent elements are the parameters to that message.
2073          *
2074          * The special named parameter 'options' in a message specification array is passed
2075          * through to the $options parameter of wfMsgExt().
2076          *
2077          * Don't use this for messages that are not in users interface language.
2078          *
2079          * For example:
2080          *
2081          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>", 'some-error' );
2082          *
2083          * Is equivalent to:
2084          *
2085          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . '</div>' );
2086          *
2087          * The newline after opening div is needed in some wikitext. See bug 19226.
2088          */
2089         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2090                 $msgSpecs = func_get_args();
2091                 array_shift( $msgSpecs );
2092                 $msgSpecs = array_values( $msgSpecs );
2093                 $s = $wrap;
2094                 foreach ( $msgSpecs as $n => $spec ) {
2095                         $options = array();
2096                         if ( is_array( $spec ) ) {
2097                                 $args = $spec;
2098                                 $name = array_shift( $args );
2099                                 if ( isset( $args['options'] ) ) {
2100                                         $options = $args['options'];
2101                                         unset( $args['options'] );
2102                                 }
2103                         }  else {
2104                                 $args = array();
2105                                 $name = $spec;
2106                         }
2107                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2108                 }
2109                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2110         }
2111
2112         /**
2113          * Include jQuery core. Use this to avoid loading it multiple times
2114          * before we get usable script loader.
2115          */
2116         public function includeJQuery() {
2117                 if ( $this->mIncludeJQuery ) return;
2118                 $this->mIncludeJQuery = true;
2119
2120                 global $wgScriptPath, $wgStyleVersion, $wgJsMimeType;
2121
2122                 $params = array(
2123                         'type' => $wgJsMimeType,
2124                         'src' => "$wgScriptPath/js2/js2stopgap.min.js?$wgStyleVersion",
2125                 );
2126                 $this->mScripts = Html::element( 'script', $params ) . "\n" . $this->mScripts;
2127         }
2128
2129 }