includes/OutputPage.php

   1 <?php
   2 # See design.doc
   3
   4 if($wgUseTeX) require_once( "Math.php" );
   5
   6 class OutputPage {
   7         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
   8         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
   9         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  10         var $mSubtitle, $mRedirect;
  11         var $mLastModified, $mCategoryLinks;
  12         var $mScripts;
  13
  14         var $mSuppressQuickbar;
  15         var $mOnloadHandler;
  16         var $mDoNothing;
  17         var $mContainsOldMagic, $mContainsNewMagic;
  18         var $mIsArticleRelated;
  19         var $mParserOptions;
  20         var $mShowFeedLinks = false;
  21         var $mEnableClientCache = true;
  22
  23         function OutputPage()
  24         {
  25                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  26                 $this->mKeywords = $this->mLinktags = array();
  27                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  28                 $this->mRedirect = $this->mLastModified =
  29                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  30                 $this->mOnloadHandler = "";
  31                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  32                 $this->mSuppressQuickbar = $this->mPrintable = false;
  33                 $this->mLanguageLinks = array();
  34                 $this->mCategoryLinks = array() ;
  35                 $this->mDoNothing = false;
  36                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  37                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  38                 $this->mSquidMaxage = 0;
  39                 $this->mScripts = "";
  40         }
  41
  42         function addHeader( $name, $val ) { array_push( $this->mHeaders, "$name: $val" ) ; }
  43         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  44         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  45
  46         # To add an http-equiv meta tag, precede the name with "http:"
  47         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  48         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  49         function addScript( $script ) { $this->mScripts .= $script; }
  50         function getScript() { return $this->mScripts; }
  51
  52         function addLink( $linkarr ) {
  53                 # $linkarr should be an associative array of attributes. We'll escape on output.
  54                 array_push( $this->mLinktags, $linkarr );
  55         }
  56
  57         function addMetadataLink( $linkarr ) {
  58                 # note: buggy CC software only reads first "meta" link
  59                 static $haveMeta = false;
  60                 $linkarr["rel"] = ($haveMeta) ? "alternate meta" : "meta";
  61                 $this->addLink( $linkarr );
  62                 $haveMeta = true;
  63         }
  64
  65         # checkLastModified tells the client to use the client-cached page if
  66         # possible. If sucessful, the OutputPage is disabled so that
  67         # any future call to OutputPage->output() have no effect. The method
  68         # returns true iff cache-ok headers was sent.
  69         function checkLastModified ( $timestamp )
  70         {
  71                 global $wgLang, $wgCachePages, $wgUser;
  72                 if( !$wgCachePages ) {
  73                         wfDebug( "CACHE DISABLED\n", false );
  74                         return;
  75                 }
  76                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  77                         # IE 5.0 has probs with our caching
  78                         wfDebug( "-- bad client, not caching\n", false );
  79                         return;
  80                 }
  81                 if( $wgUser->getOption( "nocache" ) ) {
  82                         wfDebug( "USER DISABLED CACHE\n", false );
  83                         return;
  84                 }
  85
  86                 $lastmod = gmdate( "D, j M Y H:i:s", wfTimestamp2Unix( max( $timestamp, $wgUser->mTouched ) ) ) . " GMT";
  87
  88                 if( !empty( $_SERVER["HTTP_IF_MODIFIED_SINCE"] ) ) {
  89                         # IE sends sizes after the date like this:
  90                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
  91                         # this breaks strtotime().
  92                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
  93                         $ismodsince = wfUnix2Timestamp( strtotime( $modsince ) );
  94                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
  95                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
  96
  97                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
  98                                 # Make sure you're in a place you can leave when you call us!
  99                                 header( "HTTP/1.0 304 Not Modified" );
 100                                 $this->mLastModified = $lastmod;
 101                                 $this->sendCacheControl();
 102                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 103                                 $this->disable();
 104                                 return true;
 105                         } else {
 106                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 107                                 $this->mLastModified = $lastmod;
 108                         }
 109                 } else {
 110                         wfDebug( "We're confused.\n", false );
 111                         $this->mLastModified = $lastmod;
 112                 }
 113         }
 114
 115         function getPageTitleActionText () {
 116                 global $action;
 117                 switch($action) {
 118                         case 'edit':
 119                                 return  wfMsg('edit');
 120                         case 'history':
 121                                 return wfMsg('history_short');
 122                         case 'protect':
 123                                 return wfMsg('unprotect');
 124                         case 'unprotect':
 125                                 return wfMsg('unprotect');
 126                         case 'delete':
 127                                 return wfMsg('delete');
 128                         case 'watch':
 129                                 return wfMsg('watch');
 130                         case 'unwatch':
 131                                 return wfMsg('unwatch');
 132                         case 'submit':
 133                                 return wfMsg('preview');
 134                         default:
 135                                 return '';
 136                 }
 137         }
 138         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 139         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 140         function setPageTitle( $name ) {
 141                 global $action;
 142                 $this->mPagetitle = $name;
 143                 if(!empty($action)) {
 144                         $taction =  $this->getPageTitleActionText();
 145                         if( !empty( $taction ) ) {
 146                                 $name .= " - $taction";
 147                         }
 148                 }
 149                 $this->setHTMLTitle( $name . " - " . wfMsg( "wikititlesuffix" ) );
 150         }
 151         function getHTMLTitle() { return $this->mHTMLtitle; }
 152         function getPageTitle() { return $this->mPagetitle; }
 153         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 154         function getSubtitle() { return $this->mSubtitle; }
 155         function isArticle() { return $this->mIsarticle; }
 156         function setPrintable() { $this->mPrintable = true; }
 157         function isPrintable() { return $this->mPrintable; }
 158         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 159         function isSyndicated() { return $this->mShowFeedLinks; }
 160         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 161         function getOnloadHandler() { return $this->mOnloadHandler; }
 162         function disable() { $this->mDoNothing = true; }
 163
 164         function setArticleRelated( $v )
 165         {
 166                 $this->mIsArticleRelated = $v;
 167                 if ( !$v ) {
 168                         $this->mIsarticle = false;
 169                 }
 170         }
 171         function setArticleFlag( $v ) {
 172                 $this->mIsarticle = $v;
 173                 if ( $v ) {
 174                         $this->mIsArticleRelated = $v;
 175                 }
 176         }
 177
 178         function isArticleRelated()
 179         {
 180                 return $this->mIsArticleRelated;
 181         }
 182
 183         function getLanguageLinks() {
 184                 return $this->mLanguageLinks;
 185         }
 186         function addLanguageLinks($newLinkArray) {
 187                 $this->mLanguageLinks += $newLinkArray;
 188         }
 189         function setLanguageLinks($newLinkArray) {
 190                 $this->mLanguageLinks = $newLinkArray;
 191         }
 192         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 193         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 194
 195         function addHTML( $text ) { $this->mBodytext .= $text; }
 196         function debug( $text ) { $this->mDebugtext .= $text; }
 197
 198         function setParserOptions( $options )
 199         {
 200                 return wfSetVar( $this->mParserOptions, $options );
 201         }
 202
 203         # First pass--just handle <nowiki> sections, pass the rest off
 204         # to doWikiPass2() which does all the real work.
 205         #
 206         # $cacheArticle - assume this text is the main text for the given article
 207         #
 208         function addWikiText( $text, $linestart = true, $cacheArticle = NULL )
 209         {
 210                 global $wgParser, $wgParserCache, $wgUser, $wgTitle;
 211
 212                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 213                 if ( $cacheArticle ) {
 214                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 215                 }
 216
 217                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 218                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 219                 $this->addHTML( $parserOutput->getText() );
 220         }
 221
 222         function tryParserCache( $article, $user ) {
 223                 global $wgParserCache;
 224                 $parserOutput = $wgParserCache->get( $article, $user );
 225                 if ( $parserOutput !== false ) {
 226                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 227                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 228                         $this->addHTML( $parserOutput->getText() );
 229                         return true;
 230                 } else {
 231                         return false;
 232                 }
 233         }
 234
 235         # Set the maximum cache time on the Squid in seconds
 236         function setSquidMaxage( $maxage ) {
 237                 $this->mSquidMaxage = $maxage;
 238         }
 239
 240         # Use enableClientCache(false) to force it to send nocache headers
 241         function enableClientCache( $state ) {
 242                 return wfSetVar( $this->mEnableClientCache, $state );
 243         }
 244
 245         function sendCacheControl() {
 246                 global $wgUseSquid, $wgUseESI;
 247                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 248                 header( "Vary: Accept-Encoding, Cookie" );
 249                 if( $this->mEnableClientCache ) {
 250                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( "session.name") ] ) &&
 251                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 252                         {
 253                                 if ( $wgUseESI ) {
 254                                         # We'll purge the proxy cache explicitly, but require end user agents
 255                                         # to revalidate against the proxy on each visit.
 256                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 257                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 258                                         # start with a shorter timeout for initial testing
 259                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 260                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 261                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 262                                 } else {
 263                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 264                                         # to revalidate against the proxy on each visit.
 265                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 266                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 267                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 268                                         # start with a shorter timeout for initial testing
 269                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 270                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 271                                 }
 272                         } else {
 273                                 # We do want clients to cache if they can, but they *must* check for updates
 274                                 # on revisiting the page.
 275                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 276                                 header( "Expires: -1" );
 277                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 278                         }
 279                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 280                 } else {
 281                         wfDebug( "** no caching **\n", false );
 282
 283                         # In general, the absence of a last modified header should be enough to prevent
 284                         # the client from using its cache. We send a few other things just to make sure.
 285                         header( "Expires: -1" );
 286                         header( "Cache-Control: no-cache, no-store, max-age=0, must-revalidate" );
 287                         header( "Pragma: no-cache" );
 288                 }
 289         }
 290
 291         # Finally, all the text has been munged and accumulated into
 292         # the object, let's actually output it:
 293         #
 294         function output()
 295         {
 296                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 297                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 298                 global $wgDebugRedirects, $wgMimeType;
 299                 if( $this->mDoNothing ){
 300                         return;
 301                 }
 302                 $fname = "OutputPage::output";
 303                 wfProfileIn( $fname );
 304
 305                 $sk = $wgUser->getSkin();
 306
 307                 if ( "" != $this->mRedirect ) {
 308                         if( substr( $this->mRedirect, 0, 4 ) != "http" ) {
 309                                 # Standards require redirect URLs to be absolute
 310                                 global $wgServer;
 311                                 $this->mRedirect = $wgServer . $this->mRedirect;
 312                         }
 313                         if( $this->mRedirectCode == '301') {
 314                                 if( !$wgDebugRedirects ) {
 315                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 316                                 }
 317                                 $this->mLastModified = gmdate( "D, j M Y H:i:s" ) . " GMT";
 318                         }
 319
 320                         $this->sendCacheControl();
 321
 322                         if( $wgDebugRedirects ) {
 323                                 $url = htmlspecialchars( $this->mRedirect );
 324                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 325                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 326                                 print "</body>\n</html>\n";
 327                         } else {
 328                                 header( "Location: {$this->mRedirect}" );
 329                         }
 330                         return;
 331                 }
 332
 333
 334                 $this->sendCacheControl();
 335
 336                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 337                 header( "Content-language: {$wgLanguageCode}" );
 338
 339                 $exp = time() + $wgCookieExpiration;
 340                 foreach( $this->mCookies as $name => $val ) {
 341                         setcookie( $name, $val, $exp, "/" );
 342                 }
 343
 344                 $sk->outputPage( $this );
 345                 # flush();
 346         }
 347
 348         function out( $ins )
 349         {
 350                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 351                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 352                         $outs = $ins;
 353                 } else {
 354                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 355                         if ( false === $outs ) { $outs = $ins; }
 356                 }
 357                 print $outs;
 358         }
 359
 360         function setEncodings()
 361         {
 362                 global $wgInputEncoding, $wgOutputEncoding;
 363                 global $wgUser, $wgLang;
 364
 365                 $wgInputEncoding = strtolower( $wgInputEncoding );
 366
 367                 if( $wgUser->getOption( 'altencoding' ) ) {
 368                         $wgLang->setAltEncoding();
 369                         return;
 370                 }
 371
 372                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 373                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 374                         return;
 375                 }
 376
 377                 /*
 378                 # This code is unused anyway!
 379                 # Commenting out. --bv 2003-11-15
 380
 381                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 382                 $best = 0.0;
 383                 $bestset = "*";
 384
 385                 foreach ( $a as $s ) {
 386                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 387                                 $set = $m[1];
 388                                 $q = (float)($m[2]);
 389                         } else {
 390                                 $set = $s;
 391                                 $q = 1.0;
 392                         }
 393                         if ( $q > $best ) {
 394                                 $bestset = $set;
 395                                 $best = $q;
 396                         }
 397                 }
 398                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 399                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 400                 $wgOutputEncoding = strtolower( $bestset );
 401
 402 # Disable for now
 403 #
 404                 */
 405                 $wgOutputEncoding = $wgInputEncoding;
 406         }
 407
 408         # Returns a HTML comment with the elapsed time since request.
 409         # This method has no side effects.
 410         function reportTime()
 411         {
 412                 global $wgRequestTime;
 413
 414                 $now = wfTime();
 415                 list( $usec, $sec ) = explode( " ", $wgRequestTime );
 416                 $start = (float)$sec + (float)$usec;
 417                 $elapsed = $now - $start;
 418                 $uname = posix_uname();
 419                 $hostname = $uname['nodename'];
 420                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 421                   $hostname, $elapsed );
 422                 return $com;
 423         }
 424
 425         # Note: these arguments are keys into wfMsg(), not text!
 426         #
 427         function errorpage( $title, $msg )
 428         {
 429                 global $wgTitle;
 430
 431                 $this->mDebugtext .= "Original title: " .
 432                   $wgTitle->getPrefixedText() . "\n";
 433                 $this->setPageTitle( wfMsg( $title ) );
 434                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 435                 $this->setRobotpolicy( "noindex,nofollow" );
 436                 $this->setArticleRelated( false );
 437                 $this->enableClientCache( false );
 438
 439                 $this->mBodytext = "";
 440                 $this->addHTML( "<p>" . wfMsg( $msg ) . "</p>\n" );
 441                 $this->returnToMain( false );
 442
 443                 $this->output();
 444                 wfAbruptExit();
 445         }
 446
 447         function sysopRequired()
 448         {
 449                 global $wgUser;
 450
 451                 $this->setPageTitle( wfMsg( "sysoptitle" ) );
 452                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 453                 $this->setRobotpolicy( "noindex,nofollow" );
 454                 $this->setArticleRelated( false );
 455                 $this->mBodytext = "";
 456
 457                 $sk = $wgUser->getSkin();
 458                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 459                 $this->addHTML( wfMsg( "sysoptext", $ap ) );
 460                 $this->returnToMain();
 461         }
 462
 463         function developerRequired()
 464         {
 465                 global $wgUser;
 466
 467                 $this->setPageTitle( wfMsg( "developertitle" ) );
 468                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 469                 $this->setRobotpolicy( "noindex,nofollow" );
 470                 $this->setArticleRelated( false );
 471                 $this->mBodytext = "";
 472
 473                 $sk = $wgUser->getSkin();
 474                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 475                 $this->addHTML( wfMsg( "developertext", $ap ) );
 476                 $this->returnToMain();
 477         }
 478
 479         function loginToUse()
 480         {
 481                 global $wgUser, $wgTitle, $wgLang;
 482
 483                 $this->setPageTitle( wfMsg( "loginreqtitle" ) );
 484                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 485                 $this->setRobotpolicy( "noindex,nofollow" );
 486                 $this->setArticleFlag( false );
 487                 $this->mBodytext = "";
 488                 $this->addWikiText( wfMsg( "loginreqtext" ) );
 489
 490                 # We put a comment in the .html file so a Sysop can diagnose the page the
 491                 # user can't see.
 492                 $this->addHTML( "\n<!--" .
 493                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 494                                                 ":" .
 495                                                 $wgTitle->getDBkey() . "-->" );
 496                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 497         }
 498
 499         function databaseError( $fname, $sql, $error, $errno )
 500         {
 501                 global $wgUser, $wgCommandLineMode;
 502
 503                 $this->setPageTitle( wfMsgNoDB( "databaseerror" ) );
 504                 $this->setRobotpolicy( "noindex,nofollow" );
 505                 $this->setArticleRelated( false );
 506                 $this->enableClientCache( false );
 507
 508                 if ( $wgCommandLineMode ) {
 509                         $msg = wfMsgNoDB( "dberrortextcl" );
 510                 } else {
 511                         $msg = wfMsgNoDB( "dberrortext" );
 512                 }
 513
 514                 $msg = str_replace( "$1", htmlspecialchars( $sql ), $msg );
 515                 $msg = str_replace( "$2", htmlspecialchars( $fname ), $msg );
 516                 $msg = str_replace( "$3", $errno, $msg );
 517                 $msg = str_replace( "$4", htmlspecialchars( $error ), $msg );
 518
 519                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 520                         print "$msg\n";
 521                         wfAbruptExit();
 522                 }
 523                 $sk = $wgUser->getSkin();
 524                 $shlink = $sk->makeKnownLink( wfMsgNoDB( "searchhelppage" ),
 525                   wfMsgNoDB( "searchingwikipedia" ) );
 526                 $msg = str_replace( "$5", $shlink, $msg );
 527                 $this->mBodytext = $msg;
 528                 $this->output();
 529                 wfAbruptExit();
 530         }
 531
 532         function readOnlyPage( $source = null, $protected = false )
 533         {
 534                 global $wgUser, $wgReadOnlyFile;
 535
 536                 $this->setRobotpolicy( "noindex,nofollow" );
 537                 $this->setArticleRelated( false );
 538
 539                 if( $protected ) {
 540                         $this->setPageTitle( wfMsg( "viewsource" ) );
 541                         $this->addWikiText( wfMsg( "protectedtext" ) );
 542                 } else {
 543                         $this->setPageTitle( wfMsg( "readonly" ) );
 544                         $reason = file_get_contents( $wgReadOnlyFile );
 545                         $this->addWikiText( wfMsg( "readonlytext", $reason ) );
 546                 }
 547
 548                 if( is_string( $source ) ) {
 549                         if( strcmp( $source, "" ) == 0 ) {
 550                                 $source = wfMsg( "noarticletext" );
 551                         }
 552                         $rows = $wgUser->getOption( "rows" );
 553                         $cols = $wgUser->getOption( "cols" );
 554                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 555                                 htmlspecialchars( $source ) . "\n</textarea>";
 556                         $this->addHTML( $text );
 557                 }
 558
 559                 $this->returnToMain( false );
 560         }
 561
 562         function fatalError( $message )
 563         {
 564                 $this->setPageTitle( wfMsg( "internalerror" ) );
 565                 $this->setRobotpolicy( "noindex,nofollow" );
 566                 $this->setArticleRelated( false );
 567                 $this->enableClientCache( false );
 568
 569                 $this->mBodytext = $message;
 570                 $this->output();
 571                 wfAbruptExit();
 572         }
 573
 574         function unexpectedValueError( $name, $val )
 575         {
 576                 $this->fatalError( wfMsg( "unexpected", $name, $val ) );
 577         }
 578
 579         function fileCopyError( $old, $new )
 580         {
 581                 $this->fatalError( wfMsg( "filecopyerror", $old, $new ) );
 582         }
 583
 584         function fileRenameError( $old, $new )
 585         {
 586                 $this->fatalError( wfMsg( "filerenameerror", $old, $new ) );
 587         }
 588
 589         function fileDeleteError( $name )
 590         {
 591                 $this->fatalError( wfMsg( "filedeleteerror", $name ) );
 592         }
 593
 594         function fileNotFoundError( $name )
 595         {
 596                 $this->fatalError( wfMsg( "filenotfound", $name ) );
 597         }
 598
 599         // return from error messages or notes
 600         //   auto:      automatically redirect the user after 10 seconds
 601         //   returnto:  page title to return to. Default is Main Page.
 602         function returnToMain( $auto = true, $returnto = NULL )
 603         {
 604                 global $wgUser, $wgOut, $wgRequest;
 605
 606                 if ( $returnto == NULL ) {
 607                         $returnto = $wgRequest->getText( 'returnto' );
 608                 }
 609
 610                 $sk = $wgUser->getSkin();
 611                 if ( "" == $returnto ) {
 612                         $returnto = wfMsg( "mainpage" );
 613                 }
 614                 $link = $sk->makeKnownLink( $returnto, "" );
 615
 616                 $r = wfMsg( "returnto", $link );
 617                 if ( $auto ) {
 618                         $titleObj = Title::newFromText( $returnto );
 619                         $wgOut->addMeta( "http:Refresh", "10;url=" . $titleObj->escapeFullURL() );
 620                 }
 621                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 622         }
 623
 624         # This function takes the existing and broken links for the page
 625         # and uses the first 10 of them for META keywords
 626         function addMetaTags ()
 627         {
 628                 global $wgLinkCache , $wgOut ;
 629                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 630                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 631                 $a = array_merge ( $good , $bad ) ;
 632                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 633                 $a = implode ( "," , $a ) ;
 634                 $strip = array(
 635                         "/<.*?>/" => '',
 636                         "/[_]/" => ' '
 637                 );
 638                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 639
 640                 $wgOut->addMeta ( "KEYWORDS" , $a ) ;
 641         }
 642
 643         /* private */ function headElement()
 644         {
 645                 global $wgDocType, $wgDTD, $wgLanguageCode, $wgOutputEncoding, $wgMimeType;
 646                 global $wgUser, $wgLang, $wgRequest;
 647
 648                 $xml = ($wgMimeType == 'text/xml');
 649                 if( $xml ) {
 650                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 651                 } else {
 652                         $ret = "";
 653                 }
 654
 655                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 656
 657                 if ( "" == $this->mHTMLtitle ) {
 658                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 659                 }
 660                 if( $xml ) {
 661                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 662                 } else {
 663                         $xmlbits = "";
 664                 }
 665                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : "";
 666                 $ret .= "<html $xmlbits lang=\"$wgLanguageCode\" $rtl>\n";
 667                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 668                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 669
 670                 $ret .= $this->getHeadLinks();
 671                 global $wgStylePath;
 672                 if( $this->isPrintable() ) {
 673                         $media = "";
 674                 } else {
 675                         $media = "media='print'";
 676                 }
 677                 $printsheet = htmlspecialchars( "$wgStylePath/wikiprintable.css" );
 678                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 679
 680                 $sk = $wgUser->getSkin();
 681                 $ret .= $sk->getHeadScripts();
 682                 $ret .= $this->mScripts;
 683                 $ret .= $sk->getUserStyles();
 684
 685                 $ret .= "</head>\n";
 686                 return $ret;
 687         }
 688
 689         function getHeadLinks() {
 690                 global $wgRequest, $wgStylePath;
 691                 $ret = "";
 692                 foreach ( $this->mMetatags as $tag ) {
 693                         if ( 0 == strcasecmp( "http:", substr( $tag[0], 0, 5 ) ) ) {
 694                                 $a = "http-equiv";
 695                                 $tag[0] = substr( $tag[0], 5 );
 696                         } else {
 697                                 $a = "name";
 698                         }
 699                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 700                 }
 701                 $p = $this->mRobotpolicy;
 702                 if ( "" == $p ) { $p = "index,follow"; }
 703                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 704
 705                 if ( count( $this->mKeywords ) > 0 ) {
 706                         $strip = array(
 707                                 "/<.*?>/" => '',
 708                                 "/[_]/" => ' '
 709                         );
 710                         $ret .= "<meta name=\"keywords\" content=\"" .
 711                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 712                 }
 713                 foreach ( $this->mLinktags as $tag ) {
 714                         $ret .= "<link";
 715                         foreach( $tag as $attr => $val ) {
 716                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 717                         }
 718                         $ret .= " />\n";
 719                 }
 720                 if( $this->isSyndicated() ) {
 721                         # FIXME: centralize the mime-type and name information in Feed.php
 722                         $link = $wgRequest->escapeAppendQuery( "feed=rss" );
 723                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 724                         $link = $wgRequest->escapeAppendQuery( "feed=atom" );
 725                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 726                 }
 727                 # FIXME: get these working
 728                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 729                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'></script><![endif]-->";
 730                 return $ret;
 731         }
 732 }
 733 ?>