includes/OutputPage.php

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