includes/OutputPage.php

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