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