includes/OutputPage.php

   1 <?php
   2 /**
   3  * @version $Id$
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * This is not a valid entry point, perform no further processing unless MEDIAWIKI is defined
   9  */
  10 if( defined( 'MEDIAWIKI' ) ) {
  11
  12 # See design.doc
  13
  14 if($wgUseTeX) require_once( 'Math.php' );
  15
  16 /**
  17  * @todo document
  18  * @package MediaWiki
  19  */
  20 class OutputPage {
  21         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  22         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  23         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  24         var $mSubtitle, $mRedirect;
  25         var $mLastModified, $mCategoryLinks;
  26         var $mScripts, $mLinkColours;
  27
  28         var $mSuppressQuickbar;
  29         var $mOnloadHandler;
  30         var $mDoNothing;
  31         var $mContainsOldMagic, $mContainsNewMagic;
  32         var $mIsArticleRelated;
  33         var $mParserOptions;
  34         var $mShowFeedLinks = false;
  35         var $mEnableClientCache = true;
  36
  37         /**
  38          * Constructor
  39          * Initialise private variables
  40          */
  41         function OutputPage() {
  42                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  43                 $this->mKeywords = $this->mLinktags = array();
  44                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  45                 $this->mRedirect = $this->mLastModified =
  46                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  47                 $this->mOnloadHandler = '';
  48                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  49                 $this->mSuppressQuickbar = $this->mPrintable = false;
  50                 $this->mLanguageLinks = array();
  51                 $this->mCategoryLinks = array() ;
  52                 $this->mDoNothing = false;
  53                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  54                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  55                 $this->mSquidMaxage = 0;
  56                 $this->mScripts = '';
  57         }
  58
  59         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  60         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  61         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  62
  63         # To add an http-equiv meta tag, precede the name with "http:"
  64         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  65         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  66         function addScript( $script ) { $this->mScripts .= $script; }
  67         function getScript() { return $this->mScripts; }
  68
  69         function addLink( $linkarr ) {
  70                 # $linkarr should be an associative array of attributes. We'll escape on output.
  71                 array_push( $this->mLinktags, $linkarr );
  72         }
  73
  74         function addMetadataLink( $linkarr ) {
  75                 # note: buggy CC software only reads first "meta" link
  76                 static $haveMeta = false;
  77                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  78                 $this->addLink( $linkarr );
  79                 $haveMeta = true;
  80         }
  81
  82         /**
  83          * checkLastModified tells the client to use the client-cached page if
  84          * possible. If sucessful, the OutputPage is disabled so that
  85          * any future call to OutputPage->output() have no effect. The method
  86          * returns true iff cache-ok headers was sent.
  87          */
  88         function checkLastModified ( $timestamp ) {
  89                 global $wgLang, $wgCachePages, $wgUser;
  90                 $timestamp=wfTimestamp(TS_MW,$timestamp);
  91                 if( !$wgCachePages ) {
  92                         wfDebug( "CACHE DISABLED\n", false );
  93                         return;
  94                 }
  95                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  96                         # IE 5.0 has probs with our caching
  97                         wfDebug( "-- bad client, not caching\n", false );
  98                         return;
  99                 }
 100                 if( $wgUser->getOption( 'nocache' ) ) {
 101                         wfDebug( "USER DISABLED CACHE\n", false );
 102                         return;
 103                 }
 104
 105                 $lastmod = gmdate( 'D, j M Y H:i:s', wfTimestamp(TS_UNIX, max( $timestamp, $wgUser->mTouched ) ) ) . ' GMT';
 106
 107                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 108                         # IE sends sizes after the date like this:
 109                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 110                         # this breaks strtotime().
 111                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 112                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 113                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 114                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 115                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
 116                                 # Make sure you're in a place you can leave when you call us!
 117                                 header( "HTTP/1.0 304 Not Modified" );
 118                                 $this->mLastModified = $lastmod;
 119                                 $this->sendCacheControl();
 120                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 121                                 $this->disable();
 122                                 return true;
 123                         } else {
 124                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 125                                 $this->mLastModified = $lastmod;
 126                         }
 127                 } else {
 128                         wfDebug( "We're confused.\n", false );
 129                         $this->mLastModified = $lastmod;
 130                 }
 131         }
 132
 133         function getPageTitleActionText () {
 134                 global $action;
 135                 switch($action) {
 136                         case 'edit':
 137                                 return wfMsg('edit');
 138                         case 'history':
 139                                 return wfMsg('history_short');
 140                         case 'protect':
 141                                 return wfMsg('protect');
 142                         case 'unprotect':
 143                                 return wfMsg('unprotect');
 144                         case 'delete':
 145                                 return wfMsg('delete');
 146                         case 'watch':
 147                                 return wfMsg('watch');
 148                         case 'unwatch':
 149                                 return wfMsg('unwatch');
 150                         case 'submit':
 151                                 return wfMsg('preview');
 152                         case 'info':
 153                                 return wfMsg('info_short');
 154                         default:
 155                                 return '';
 156                 }
 157         }
 158
 159         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 160         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 161         function setPageTitle( $name ) {
 162                 global $action, $wgContLang;
 163                 $name = $wgContLang->convert($name, true);
 164                 $this->mPagetitle = $name;
 165                 if(!empty($action)) {
 166                         $taction =  $this->getPageTitleActionText();
 167                         if( !empty( $taction ) ) {
 168                                 $name .= ' - '.$taction;
 169                         }
 170                 }
 171                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 172         }
 173         function getHTMLTitle() { return $this->mHTMLtitle; }
 174         function getPageTitle() { return $this->mPagetitle; }
 175         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 176         function getSubtitle() { return $this->mSubtitle; }
 177         function isArticle() { return $this->mIsarticle; }
 178         function setPrintable() { $this->mPrintable = true; }
 179         function isPrintable() { return $this->mPrintable; }
 180         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 181         function isSyndicated() { return $this->mShowFeedLinks; }
 182         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 183         function getOnloadHandler() { return $this->mOnloadHandler; }
 184         function disable() { $this->mDoNothing = true; }
 185
 186         function setArticleRelated( $v ) {
 187                 $this->mIsArticleRelated = $v;
 188                 if ( !$v ) {
 189                         $this->mIsarticle = false;
 190                 }
 191         }
 192         function setArticleFlag( $v ) {
 193                 $this->mIsarticle = $v;
 194                 if ( $v ) {
 195                         $this->mIsArticleRelated = $v;
 196                 }
 197         }
 198
 199         function isArticleRelated() { return $this->mIsArticleRelated; }
 200
 201         function getLanguageLinks() { return $this->mLanguageLinks; }
 202         function addLanguageLinks($newLinkArray) {
 203                 $this->mLanguageLinks += $newLinkArray;
 204         }
 205         function setLanguageLinks($newLinkArray) {
 206                 $this->mLanguageLinks = $newLinkArray;
 207         }
 208
 209         function getCategoryLinks() {
 210                 return $this->mCategoryLinks;
 211         }
 212         function addCategoryLinks($newLinkArray) {
 213                 $this->mCategoryLinks += $newLinkArray;
 214         }
 215         function setCategoryLinks($newLinkArray) {
 216                 $this->mCategoryLinks += $newLinkArray;
 217         }
 218
 219         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 220         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 221
 222         function addHTML( $text ) { $this->mBodytext .= $text; }
 223         function clearHTML() { $this->mBodytext = ''; }
 224         function debug( $text ) { $this->mDebugtext .= $text; }
 225
 226         function setParserOptions( $options ) {
 227                 return wfSetVar( $this->mParserOptions, $options );
 228         }
 229
 230         /**
 231          * Convert wikitext to HTML and add it to the buffer
 232          */
 233         function addWikiText( $text, $linestart = true ) {
 234                 global $wgParser, $wgTitle, $wgUseTidy;
 235
 236                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 237                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 238                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 239                 $this->addHTML( $parserOutput->getText() );
 240         }
 241
 242         /**
 243          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 244          * Saves the text into the parser cache if possible
 245          */
 246         function addPrimaryWikiText( $text, $cacheArticle ) {
 247                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 248
 249                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 250
 251                 $text = $parserOutput->getText();
 252
 253                 if ( $cacheArticle ) {
 254                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 255                 }
 256
 257                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 258                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 259                 $this->addHTML( $text );
 260         }
 261
 262         /**
 263          * Add the output of a QuickTemplate to the output buffer
 264          * @param QuickTemplate $template
 265          */
 266         function addTemplate( &$template ) {
 267                 ob_start();
 268                 $template->execute();
 269                 $this->addHtml( ob_get_contents() );
 270                 ob_end_clean();
 271         }
 272
 273         /**
 274          * Parse wikitext and return the HTML. This is for special pages that add the text later
 275          */
 276         function parse( $text, $linestart = true ) {
 277                 global $wgParser, $wgTitle;
 278                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 279                 return $parserOutput->getText();
 280         }
 281
 282         /**
 283          * @param $article
 284          * @param $user
 285          */
 286         function tryParserCache( $article, $user ) {
 287                 global $wgParserCache;
 288                 $parserOutput = $wgParserCache->get( $article, $user );
 289                 if ( $parserOutput !== false ) {
 290                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 291                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 292                         $this->addHTML( $parserOutput->getText() );
 293                         return true;
 294                 } else {
 295                         return false;
 296                 }
 297         }
 298
 299         /**
 300          * Set the maximum cache time on the Squid in seconds
 301          * @param $maxage
 302          */
 303         function setSquidMaxage( $maxage ) {
 304                 $this->mSquidMaxage = $maxage;
 305         }
 306
 307         /**
 308          * Use enableClientCache(false) to force it to send nocache headers
 309          * @param $state
 310          */
 311         function enableClientCache( $state ) {
 312                 return wfSetVar( $this->mEnableClientCache, $state );
 313         }
 314
 315         function sendCacheControl() {
 316                 global $wgUseSquid, $wgUseESI;
 317                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 318                 header( 'Vary: Accept-Encoding, Cookie' );
 319                 if( $this->mEnableClientCache ) {
 320                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 321                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 322                         {
 323                                 if ( $wgUseESI ) {
 324                                         # We'll purge the proxy cache explicitly, but require end user agents
 325                                         # to revalidate against the proxy on each visit.
 326                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 327                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 328                                         # start with a shorter timeout for initial testing
 329                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 330                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 331                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 332                                 } else {
 333                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 334                                         # to revalidate against the proxy on each visit.
 335                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 336                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 337                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 338                                         # start with a shorter timeout for initial testing
 339                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 340                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 341                                 }
 342                         } else {
 343                                 # We do want clients to cache if they can, but they *must* check for updates
 344                                 # on revisiting the page.
 345                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 346                                 header( "Expires: -1" );
 347                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 348                         }
 349                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 350                 } else {
 351                         wfDebug( "** no caching **\n", false );
 352
 353                         # In general, the absence of a last modified header should be enough to prevent
 354                         # the client from using its cache. We send a few other things just to make sure.
 355                         header( 'Expires: -1' );
 356                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 357                         header( 'Pragma: no-cache' );
 358                 }
 359         }
 360
 361         /**
 362          * Finally, all the text has been munged and accumulated into
 363          * the object, let's actually output it:
 364          */
 365         function output() {
 366                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 367                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 368                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 369
 370                 if( $this->mDoNothing ){
 371                         return;
 372                 }
 373                 $fname = 'OutputPage::output';
 374                 wfProfileIn( $fname );
 375                 $sk = $wgUser->getSkin();
 376
 377                 if ( '' != $this->mRedirect ) {
 378                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 379                                 # Standards require redirect URLs to be absolute
 380                                 global $wgServer;
 381                                 $this->mRedirect = $wgServer . $this->mRedirect;
 382                         }
 383                         if( $this->mRedirectCode == '301') {
 384                                 if( !$wgDebugRedirects ) {
 385                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 386                                 }
 387                                 $this->mLastModified = gmdate( 'D, j M Y H:i:s' ) . ' GMT';
 388                         }
 389
 390                         $this->sendCacheControl();
 391
 392                         if( $wgDebugRedirects ) {
 393                                 $url = htmlspecialchars( $this->mRedirect );
 394                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 395                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 396                                 print "</body>\n</html>\n";
 397                         } else {
 398                                 header( 'Location: '.$this->mRedirect );
 399                         }
 400                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 401                         return;
 402                 }
 403
 404
 405                 # Buffer output; final headers may depend on later processing
 406                 ob_start();
 407
 408                 $this->transformBuffer();
 409
 410                 # Disable temporary placeholders, so that the skin produces HTML
 411                 $sk->postParseLinkColour( false );
 412
 413                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 414                 header( 'Content-language: '.$wgContLanguageCode );
 415
 416                 $exp = time() + $wgCookieExpiration;
 417                 foreach( $this->mCookies as $name => $val ) {
 418                         setcookie( $name, $val, $exp, '/' );
 419                 }
 420
 421                 wfProfileIn( 'Output-skin' );
 422                 $sk->outputPage( $this );
 423                 wfProfileOut( 'Output-skin' );
 424
 425                 $this->sendCacheControl();
 426                 ob_end_flush();
 427         }
 428
 429         function out( $ins ) {
 430                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 431                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 432                         $outs = $ins;
 433                 } else {
 434                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 435                         if ( false === $outs ) { $outs = $ins; }
 436                 }
 437                 print $outs;
 438         }
 439
 440         function setEncodings() {
 441                 global $wgInputEncoding, $wgOutputEncoding;
 442                 global $wgUser, $wgContLang;
 443
 444                 $wgInputEncoding = strtolower( $wgInputEncoding );
 445
 446                 if( $wgUser->getOption( 'altencoding' ) ) {
 447                         $wgContLang->setAltEncoding();
 448                         return;
 449                 }
 450
 451                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 452                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 453                         return;
 454                 }
 455
 456                 /*
 457                 # This code is unused anyway!
 458                 # Commenting out. --bv 2003-11-15
 459
 460                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 461                 $best = 0.0;
 462                 $bestset = "*";
 463
 464                 foreach ( $a as $s ) {
 465                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 466                                 $set = $m[1];
 467                                 $q = (float)($m[2]);
 468                         } else {
 469                                 $set = $s;
 470                                 $q = 1.0;
 471                         }
 472                         if ( $q > $best ) {
 473                                 $bestset = $set;
 474                                 $best = $q;
 475                         }
 476                 }
 477                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 478                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 479                 $wgOutputEncoding = strtolower( $bestset );
 480
 481 # Disable for now
 482 #
 483                 */
 484                 $wgOutputEncoding = $wgInputEncoding;
 485         }
 486
 487         /**
 488          * Returns a HTML comment with the elapsed time since request.
 489          * This method has no side effects.
 490          */
 491         function reportTime() {
 492                 global $wgRequestTime;
 493
 494                 $now = wfTime();
 495                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 496                 $start = (float)$sec + (float)$usec;
 497                 $elapsed = $now - $start;
 498
 499                 # Use real server name if available, so we know which machine
 500                 # in a server farm generated the current page.
 501                 if ( function_exists( 'posix_uname' ) ) {
 502                         $uname = @posix_uname();
 503                 } else {
 504                         $uname = false;
 505                 }
 506                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 507                         $hostname = $uname['nodename'];
 508                 } else {
 509                         # This may be a virtual server.
 510                         $hostname = $_SERVER['SERVER_NAME'];
 511                 }
 512                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 513                   $hostname, $elapsed );
 514                 return $com;
 515         }
 516
 517         /**
 518          * Note: these arguments are keys into wfMsg(), not text!
 519          */
 520         function errorpage( $title, $msg ) {
 521                 global $wgTitle;
 522
 523                 $this->mDebugtext .= 'Original title: ' .
 524                   $wgTitle->getPrefixedText() . "\n";
 525                 $this->setPageTitle( wfMsg( $title ) );
 526                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 527                 $this->setRobotpolicy( 'noindex,nofollow' );
 528                 $this->setArticleRelated( false );
 529                 $this->suppressQuickbar();
 530
 531                 $this->enableClientCache( false );
 532                 $this->mRedirect = '';
 533
 534                 $this->mBodytext = '';
 535                 $this->addHTML( '<p>' . wfMsg( $msg ) . "</p>\n" );
 536                 $this->returnToMain( false );
 537
 538                 $this->output();
 539                 wfErrorExit();
 540         }
 541
 542         function sysopRequired() {
 543                 global $wgUser;
 544
 545                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 546                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 547                 $this->setRobotpolicy( 'noindex,nofollow' );
 548                 $this->setArticleRelated( false );
 549                 $this->mBodytext = '';
 550
 551                 $sk = $wgUser->getSkin();
 552                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 553                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 554                 $this->returnToMain();
 555         }
 556
 557         function developerRequired() {
 558                 global $wgUser;
 559
 560                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 561                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 562                 $this->setRobotpolicy( 'noindex,nofollow' );
 563                 $this->setArticleRelated( false );
 564                 $this->mBodytext = '';
 565
 566                 $sk = $wgUser->getSkin();
 567                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 568                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 569                 $this->returnToMain();
 570         }
 571
 572         function loginToUse() {
 573                 global $wgUser, $wgTitle, $wgContLang;
 574
 575                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 576                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 577                 $this->setRobotpolicy( 'noindex,nofollow' );
 578                 $this->setArticleFlag( false );
 579                 $this->mBodytext = '';
 580                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 581
 582                 # We put a comment in the .html file so a Sysop can diagnose the page the
 583                 # user can't see.
 584                 $this->addHTML( "\n<!--" .
 585                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 586                                                 ':' .
 587                                                 $wgTitle->getDBkey() . '-->' );
 588                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 589         }
 590
 591         function databaseError( $fname, $sql, $error, $errno ) {
 592                 global $wgUser, $wgCommandLineMode;
 593
 594                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 595                 $this->setRobotpolicy( 'noindex,nofollow' );
 596                 $this->setArticleRelated( false );
 597                 $this->enableClientCache( false );
 598                 $this->mRedirect = '';
 599
 600                 if ( $wgCommandLineMode ) {
 601                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 602                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 603                 } else {
 604                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 605                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 606                 }
 607
 608                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 609                         print $msg."\n";
 610                         wfErrorExit();
 611                 }
 612                 $this->mBodytext = $msg;
 613                 $this->output();
 614                 wfErrorExit();
 615         }
 616
 617         function readOnlyPage( $source = null, $protected = false ) {
 618                 global $wgUser, $wgReadOnlyFile;
 619
 620                 $this->setRobotpolicy( 'noindex,nofollow' );
 621                 $this->setArticleRelated( false );
 622
 623                 if( $protected ) {
 624                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 625                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 626                 } else {
 627                         $this->setPageTitle( wfMsg( 'readonly' ) );
 628                         $reason = file_get_contents( $wgReadOnlyFile );
 629                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 630                 }
 631
 632                 if( is_string( $source ) ) {
 633                         if( strcmp( $source, '' ) == 0 ) {
 634                                 $source = wfMsg( 'noarticletext' );
 635                         }
 636                         $rows = $wgUser->getOption( 'rows' );
 637                         $cols = $wgUser->getOption( 'cols' );
 638                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 639                                 htmlspecialchars( $source ) . "\n</textarea>";
 640                         $this->addHTML( $text );
 641                 }
 642
 643                 $this->returnToMain( false );
 644         }
 645
 646         function fatalError( $message ) {
 647                 $this->setPageTitle( wfMsg( "internalerror" ) );
 648                 $this->setRobotpolicy( "noindex,nofollow" );
 649                 $this->setArticleRelated( false );
 650                 $this->enableClientCache( false );
 651                 $this->mRedirect = '';
 652
 653                 $this->mBodytext = $message;
 654                 $this->output();
 655                 wfErrorExit();
 656         }
 657
 658         function unexpectedValueError( $name, $val ) {
 659                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 660         }
 661
 662         function fileCopyError( $old, $new ) {
 663                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 664         }
 665
 666         function fileRenameError( $old, $new ) {
 667                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 668         }
 669
 670         function fileDeleteError( $name ) {
 671                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 672         }
 673
 674         function fileNotFoundError( $name ) {
 675                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 676         }
 677
 678         /**
 679          * return from error messages or notes
 680          * @param $auto automatically redirect the user after 10 seconds
 681          * @param $returnto page title to return to. Default is Main Page.
 682          */
 683         function returnToMain( $auto = true, $returnto = NULL ) {
 684                 global $wgUser, $wgOut, $wgRequest;
 685
 686                 if ( $returnto == NULL ) {
 687                         $returnto = $wgRequest->getText( 'returnto' );
 688                 }
 689                 $returnto = htmlspecialchars( $returnto );
 690
 691                 $sk = $wgUser->getSkin();
 692                 if ( '' == $returnto ) {
 693                         $returnto = wfMsgForContent( 'mainpage' );
 694                 }
 695                 $link = $sk->makeKnownLink( $returnto, '' );
 696
 697                 $r = wfMsg( 'returnto', $link );
 698                 if ( $auto ) {
 699                         $titleObj = Title::newFromText( $returnto );
 700                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 701                 }
 702                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 703         }
 704
 705         /**
 706          * This function takes the existing and broken links for the page
 707          * and uses the first 10 of them for META keywords
 708          */
 709         function addMetaTags () {
 710                 global $wgLinkCache , $wgOut ;
 711                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 712                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 713                 $a = array_merge ( $good , $bad ) ;
 714                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 715                 $a = implode ( ',' , $a ) ;
 716                 $strip = array(
 717                         "/<.*?" . ">/" => '',
 718                         "/[_]/" => ' '
 719                 );
 720                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 721
 722                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 723         }
 724
 725         /**
 726          * @private
 727          */
 728         function headElement() {
 729                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 730                 global $wgUser, $wgContLang, $wgRequest;
 731
 732                 $xml = ($wgMimeType == 'text/xml');
 733                 if( $xml ) {
 734                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 735                 } else {
 736                         $ret = '';
 737                 }
 738
 739                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 740
 741                 if ( "" == $this->mHTMLtitle ) {
 742                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 743                 }
 744                 if( $xml ) {
 745                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 746                 } else {
 747                         $xmlbits = '';
 748                 }
 749                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 750                 $ret .= "<html $xmlbits lang=\"$wgContLanguageCode\" $rtl>\n";
 751                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 752                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 753
 754                 $ret .= $this->getHeadLinks();
 755                 global $wgStylePath;
 756                 if( $this->isPrintable() ) {
 757                         $media = '';
 758                 } else {
 759                         $media = "media='print'";
 760                 }
 761                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 762                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 763
 764                 $sk = $wgUser->getSkin();
 765                 $ret .= $sk->getHeadScripts();
 766                 $ret .= $this->mScripts;
 767                 $ret .= $sk->getUserStyles();
 768
 769                 $ret .= "</head>\n";
 770                 return $ret;
 771         }
 772
 773         function getHeadLinks() {
 774                 global $wgRequest, $wgStylePath;
 775                 $ret = '';
 776                 foreach ( $this->mMetatags as $tag ) {
 777                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 778                                 $a = 'http-equiv';
 779                                 $tag[0] = substr( $tag[0], 5 );
 780                         } else {
 781                                 $a = 'name';
 782                         }
 783                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 784                 }
 785                 $p = $this->mRobotpolicy;
 786                 if ( '' == $p ) { $p = 'index,follow'; }
 787                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 788
 789                 if ( count( $this->mKeywords ) > 0 ) {
 790                         $strip = array(
 791                                 "/<.*?" . ">/" => '',
 792                                 "/[_]/" => ' '
 793                         );
 794                         $ret .= "<meta name=\"keywords\" content=\"" .
 795                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 796                 }
 797                 foreach ( $this->mLinktags as $tag ) {
 798                         $ret .= '<link';
 799                         foreach( $tag as $attr => $val ) {
 800                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 801                         }
 802                         $ret .= " />\n";
 803                 }
 804                 if( $this->isSyndicated() ) {
 805                         # FIXME: centralize the mime-type and name information in Feed.php
 806                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 807                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 808                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 809                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 810                 }
 811                 # FIXME: get these working
 812                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 813                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 814                 return $ret;
 815         }
 816
 817         /**
 818          * Run any necessary pre-output transformations on the buffer text
 819          */
 820         function transformBuffer( $options = 0 ) {
 821         }
 822
 823 }
 824
 825 }
 826
 827 ?>