includes/OutputPage.php

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