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 = false;
 213                 if ( $cacheArticle ) {
 214                         $parserOutput = $wgParserCache->get( $cacheArticle, $wgUser );
 215                 }
 216
 217                 if ( $parserOutput === false ) {
 218                         $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 219                         if ( $cacheArticle ) {
 220                                 $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 221                         }
 222                 }
 223
 224                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 225                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 226
 227                 $this->addHTML( $parserOutput->getText() );
 228
 229         }
 230
 231         # Set the maximum cache time on the Squid in seconds
 232         function setSquidMaxage( $maxage ) {
 233                 $this->mSquidMaxage = $maxage;
 234         }
 235
 236         # Use enableClientCache(false) to force it to send nocache headers
 237         function enableClientCache( $state ) {
 238                 return wfSetVar( $this->mEnableClientCache, $state );
 239         }
 240
 241         function sendCacheControl() {
 242                 global $wgUseSquid, $wgUseESI;
 243                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 244                 header( "Vary: Accept-Encoding, Cookie" );
 245                 if( $this->mEnableClientCache ) {
 246                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( "session.name") ] ) &&
 247                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 248                         {
 249                                 if ( $wgUseESI ) {
 250                                         # We'll purge the proxy cache explicitly, but require end user agents
 251                                         # to revalidate against the proxy on each visit.
 252                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 253                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 254                                         # start with a shorter timeout for initial testing
 255                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 256                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 257                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 258                                 } else {
 259                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 260                                         # to revalidate against the proxy on each visit.
 261                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 262                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 263                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 264                                         # start with a shorter timeout for initial testing
 265                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 266                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 267                                 }
 268                         } else {
 269                                 # We do want clients to cache if they can, but they *must* check for updates
 270                                 # on revisiting the page.
 271                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 272                                 header( "Expires: -1" );
 273                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 274                         }
 275                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 276                 } else {
 277                         wfDebug( "** no caching **\n", false );
 278
 279                         # In general, the absence of a last modified header should be enough to prevent
 280                         # the client from using its cache. We send a few other things just to make sure.
 281                         header( "Expires: -1" );
 282                         header( "Cache-Control: no-cache, no-store, max-age=0, must-revalidate" );
 283                         header( "Pragma: no-cache" );
 284                 }
 285         }
 286
 287         # Finally, all the text has been munged and accumulated into
 288         # the object, let's actually output it:
 289         #
 290         function output()
 291         {
 292                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 293                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 294                 global $wgDebugRedirects, $wgMimeType;
 295                 if( $this->mDoNothing ){
 296                         return;
 297                 }
 298                 $fname = "OutputPage::output";
 299                 wfProfileIn( $fname );
 300
 301                 $sk = $wgUser->getSkin();
 302
 303                 if ( "" != $this->mRedirect ) {
 304                         if( substr( $this->mRedirect, 0, 4 ) != "http" ) {
 305                                 # Standards require redirect URLs to be absolute
 306                                 global $wgServer;
 307                                 $this->mRedirect = $wgServer . $this->mRedirect;
 308                         }
 309                         if( $this->mRedirectCode == '301') {
 310                                 if( !$wgDebugRedirects ) {
 311                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 312                                 }
 313                                 $this->mLastModified = gmdate( "D, j M Y H:i:s" ) . " GMT";
 314                         }
 315
 316                         $this->sendCacheControl();
 317
 318                         if( $wgDebugRedirects ) {
 319                                 $url = htmlspecialchars( $this->mRedirect );
 320                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 321                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 322                                 print "</body>\n</html>\n";
 323                         } else {
 324                                 header( "Location: {$this->mRedirect}" );
 325                         }
 326                         return;
 327                 }
 328
 329
 330                 $this->sendCacheControl();
 331
 332                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 333                 header( "Content-language: {$wgLanguageCode}" );
 334
 335                 $exp = time() + $wgCookieExpiration;
 336                 foreach( $this->mCookies as $name => $val ) {
 337                         setcookie( $name, $val, $exp, "/" );
 338                 }
 339
 340                 $sk->outputPage( $this );
 341                 # flush();
 342         }
 343
 344         function out( $ins )
 345         {
 346                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 347                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 348                         $outs = $ins;
 349                 } else {
 350                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 351                         if ( false === $outs ) { $outs = $ins; }
 352                 }
 353                 print $outs;
 354         }
 355
 356         function setEncodings()
 357         {
 358                 global $wgInputEncoding, $wgOutputEncoding;
 359                 global $wgUser, $wgLang;
 360
 361                 $wgInputEncoding = strtolower( $wgInputEncoding );
 362
 363                 if( $wgUser->getOption( 'altencoding' ) ) {
 364                         $wgLang->setAltEncoding();
 365                         return;
 366                 }
 367
 368                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 369                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 370                         return;
 371                 }
 372
 373                 /*
 374                 # This code is unused anyway!
 375                 # Commenting out. --bv 2003-11-15
 376
 377                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 378                 $best = 0.0;
 379                 $bestset = "*";
 380
 381                 foreach ( $a as $s ) {
 382                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 383                                 $set = $m[1];
 384                                 $q = (float)($m[2]);
 385                         } else {
 386                                 $set = $s;
 387                                 $q = 1.0;
 388                         }
 389                         if ( $q > $best ) {
 390                                 $bestset = $set;
 391                                 $best = $q;
 392                         }
 393                 }
 394                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 395                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 396                 $wgOutputEncoding = strtolower( $bestset );
 397
 398 # Disable for now
 399 #
 400                 */
 401                 $wgOutputEncoding = $wgInputEncoding;
 402         }
 403
 404         # Returns a HTML comment with the elapsed time since request.
 405         # This method has no side effects.
 406         function reportTime()
 407         {
 408                 global $wgRequestTime;
 409
 410                 $now = wfTime();
 411                 list( $usec, $sec ) = explode( " ", $wgRequestTime );
 412                 $start = (float)$sec + (float)$usec;
 413                 $elapsed = $now - $start;
 414                 $uname = posix_uname();
 415                 $hostname = $uname['nodename'];
 416                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 417                   $hostname, $elapsed );
 418                 return $com;
 419         }
 420
 421         # Note: these arguments are keys into wfMsg(), not text!
 422         #
 423         function errorpage( $title, $msg )
 424         {
 425                 global $wgTitle;
 426
 427                 $this->mDebugtext .= "Original title: " .
 428                   $wgTitle->getPrefixedText() . "\n";
 429                 $this->setPageTitle( wfMsg( $title ) );
 430                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 431                 $this->setRobotpolicy( "noindex,nofollow" );
 432                 $this->setArticleRelated( false );
 433                 $this->enableClientCache( false );
 434
 435                 $this->mBodytext = "";
 436                 $this->addHTML( "<p>" . wfMsg( $msg ) . "</p>\n" );
 437                 $this->returnToMain( false );
 438
 439                 $this->output();
 440                 wfAbruptExit();
 441         }
 442
 443         function sysopRequired()
 444         {
 445                 global $wgUser;
 446
 447                 $this->setPageTitle( wfMsg( "sysoptitle" ) );
 448                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 449                 $this->setRobotpolicy( "noindex,nofollow" );
 450                 $this->setArticleRelated( false );
 451                 $this->mBodytext = "";
 452
 453                 $sk = $wgUser->getSkin();
 454                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 455                 $this->addHTML( wfMsg( "sysoptext", $ap ) );
 456                 $this->returnToMain();
 457         }
 458
 459         function developerRequired()
 460         {
 461                 global $wgUser;
 462
 463                 $this->setPageTitle( wfMsg( "developertitle" ) );
 464                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 465                 $this->setRobotpolicy( "noindex,nofollow" );
 466                 $this->setArticleRelated( false );
 467                 $this->mBodytext = "";
 468
 469                 $sk = $wgUser->getSkin();
 470                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 471                 $this->addHTML( wfMsg( "developertext", $ap ) );
 472                 $this->returnToMain();
 473         }
 474
 475         function loginToUse()
 476         {
 477                 global $wgUser, $wgTitle, $wgLang;
 478
 479                 $this->setPageTitle( wfMsg( "loginreqtitle" ) );
 480                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 481                 $this->setRobotpolicy( "noindex,nofollow" );
 482                 $this->setArticleFlag( false );
 483                 $this->mBodytext = "";
 484                 $this->addWikiText( wfMsg( "loginreqtext" ) );
 485
 486                 # We put a comment in the .html file so a Sysop can diagnose the page the
 487                 # user can't see.
 488                 $this->addHTML( "\n<!--" .
 489                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 490                                                 ":" .
 491                                                 $wgTitle->getDBkey() . "-->" );
 492                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 493         }
 494
 495         function databaseError( $fname, $sql, $error, $errno )
 496         {
 497                 global $wgUser, $wgCommandLineMode;
 498
 499                 $this->setPageTitle( wfMsgNoDB( "databaseerror" ) );
 500                 $this->setRobotpolicy( "noindex,nofollow" );
 501                 $this->setArticleRelated( false );
 502                 $this->enableClientCache( false );
 503
 504                 if ( $wgCommandLineMode ) {
 505                         $msg = wfMsgNoDB( "dberrortextcl" );
 506                 } else {
 507                         $msg = wfMsgNoDB( "dberrortext" );
 508                 }
 509
 510                 $msg = str_replace( "$1", htmlspecialchars( $sql ), $msg );
 511                 $msg = str_replace( "$2", htmlspecialchars( $fname ), $msg );
 512                 $msg = str_replace( "$3", $errno, $msg );
 513                 $msg = str_replace( "$4", htmlspecialchars( $error ), $msg );
 514
 515                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 516                         print "$msg\n";
 517                         wfAbruptExit();
 518                 }
 519                 $sk = $wgUser->getSkin();
 520                 $shlink = $sk->makeKnownLink( wfMsgNoDB( "searchhelppage" ),
 521                   wfMsgNoDB( "searchingwikipedia" ) );
 522                 $msg = str_replace( "$5", $shlink, $msg );
 523                 $this->mBodytext = $msg;
 524                 $this->output();
 525                 wfAbruptExit();
 526         }
 527
 528         function readOnlyPage( $source = null, $protected = false )
 529         {
 530                 global $wgUser, $wgReadOnlyFile;
 531
 532                 $this->setRobotpolicy( "noindex,nofollow" );
 533                 $this->setArticleRelated( false );
 534
 535                 if( $protected ) {
 536                         $this->setPageTitle( wfMsg( "viewsource" ) );
 537                         $this->addWikiText( wfMsg( "protectedtext" ) );
 538                 } else {
 539                         $this->setPageTitle( wfMsg( "readonly" ) );
 540                         $reason = file_get_contents( $wgReadOnlyFile );
 541                         $this->addWikiText( wfMsg( "readonlytext", $reason ) );
 542                 }
 543
 544                 if( is_string( $source ) ) {
 545                         if( strcmp( $source, "" ) == 0 ) {
 546                                 $source = wfMsg( "noarticletext" );
 547                         }
 548                         $rows = $wgUser->getOption( "rows" );
 549                         $cols = $wgUser->getOption( "cols" );
 550                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 551                                 htmlspecialchars( $source ) . "\n</textarea>";
 552                         $this->addHTML( $text );
 553                 }
 554
 555                 $this->returnToMain( false );
 556         }
 557
 558         function fatalError( $message )
 559         {
 560                 $this->setPageTitle( wfMsg( "internalerror" ) );
 561                 $this->setRobotpolicy( "noindex,nofollow" );
 562                 $this->setArticleRelated( false );
 563                 $this->enableClientCache( false );
 564
 565                 $this->mBodytext = $message;
 566                 $this->output();
 567                 wfAbruptExit();
 568         }
 569
 570         function unexpectedValueError( $name, $val )
 571         {
 572                 $this->fatalError( wfMsg( "unexpected", $name, $val ) );
 573         }
 574
 575         function fileCopyError( $old, $new )
 576         {
 577                 $this->fatalError( wfMsg( "filecopyerror", $old, $new ) );
 578         }
 579
 580         function fileRenameError( $old, $new )
 581         {
 582                 $this->fatalError( wfMsg( "filerenameerror", $old, $new ) );
 583         }
 584
 585         function fileDeleteError( $name )
 586         {
 587                 $this->fatalError( wfMsg( "filedeleteerror", $name ) );
 588         }
 589
 590         function fileNotFoundError( $name )
 591         {
 592                 $this->fatalError( wfMsg( "filenotfound", $name ) );
 593         }
 594
 595         // return from error messages or notes
 596         //   auto:      automatically redirect the user after 10 seconds
 597         //   returnto:  page title to return to. Default is Main Page.
 598         function returnToMain( $auto = true, $returnto = NULL )
 599         {
 600                 global $wgUser, $wgOut, $wgRequest;
 601
 602                 if ( $returnto == NULL ) {
 603                         $returnto = $wgRequest->getText( 'returnto' );
 604                 }
 605
 606                 $sk = $wgUser->getSkin();
 607                 if ( "" == $returnto ) {
 608                         $returnto = wfMsg( "mainpage" );
 609                 }
 610                 $link = $sk->makeKnownLink( $returnto, "" );
 611
 612                 $r = wfMsg( "returnto", $link );
 613                 if ( $auto ) {
 614                         $titleObj = Title::newFromText( $returnto );
 615                         $wgOut->addMeta( "http:Refresh", "10;url=" . $titleObj->escapeFullURL() );
 616                 }
 617                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 618         }
 619
 620         # This function takes the existing and broken links for the page
 621         # and uses the first 10 of them for META keywords
 622         function addMetaTags ()
 623         {
 624                 global $wgLinkCache , $wgOut ;
 625                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 626                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 627                 $a = array_merge ( $good , $bad ) ;
 628                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 629                 $a = implode ( "," , $a ) ;
 630                 $strip = array(
 631                         "/<.*?>/" => '',
 632                         "/[_]/" => ' '
 633                 );
 634                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 635
 636                 $wgOut->addMeta ( "KEYWORDS" , $a ) ;
 637         }
 638
 639         /* private */ function headElement()
 640         {
 641                 global $wgDocType, $wgDTD, $wgLanguageCode, $wgOutputEncoding, $wgMimeType;
 642                 global $wgUser, $wgLang, $wgRequest;
 643
 644                 $xml = ($wgMimeType == 'text/xml');
 645                 if( $xml ) {
 646                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 647                 } else {
 648                         $ret = "";
 649                 }
 650
 651                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 652
 653                 if ( "" == $this->mHTMLtitle ) {
 654                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 655                 }
 656                 if( $xml ) {
 657                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 658                 } else {
 659                         $xmlbits = "";
 660                 }
 661                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : "";
 662                 $ret .= "<html $xmlbits lang=\"$wgLanguageCode\" $rtl>\n";
 663                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 664                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 665
 666                 $ret .= $this->getHeadLinks();
 667                 global $wgStylePath;
 668                 if( $this->isPrintable() ) {
 669                         $media = "";
 670                 } else {
 671                         $media = "media='print'";
 672                 }
 673                 $printsheet = htmlspecialchars( "$wgStylePath/wikiprintable.css" );
 674                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 675
 676                 $sk = $wgUser->getSkin();
 677                 $ret .= $sk->getHeadScripts();
 678                 $ret .= $this->mScripts;
 679                 $ret .= $sk->getUserStyles();
 680
 681                 $ret .= "</head>\n";
 682                 return $ret;
 683         }
 684
 685         function getHeadLinks() {
 686                 global $wgRequest, $wgStylePath;
 687                 $ret = "";
 688                 foreach ( $this->mMetatags as $tag ) {
 689                         if ( 0 == strcasecmp( "http:", substr( $tag[0], 0, 5 ) ) ) {
 690                                 $a = "http-equiv";
 691                                 $tag[0] = substr( $tag[0], 5 );
 692                         } else {
 693                                 $a = "name";
 694                         }
 695                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 696                 }
 697                 $p = $this->mRobotpolicy;
 698                 if ( "" == $p ) { $p = "index,follow"; }
 699                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 700
 701                 if ( count( $this->mKeywords ) > 0 ) {
 702                         $strip = array(
 703                                 "/<.*?>/" => '',
 704                                 "/[_]/" => ' '
 705                         );
 706                         $ret .= "<meta name=\"keywords\" content=\"" .
 707                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 708                 }
 709                 foreach ( $this->mLinktags as $tag ) {
 710                         $ret .= "<link";
 711                         foreach( $tag as $attr => $val ) {
 712                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 713                         }
 714                         $ret .= " />\n";
 715                 }
 716                 if( $this->isSyndicated() ) {
 717                         # FIXME: centralize the mime-type and name information in Feed.php
 718                         $link = $wgRequest->escapeAppendQuery( "feed=rss" );
 719                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 720                         $link = $wgRequest->escapeAppendQuery( "feed=atom" );
 721                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 722                 }
 723                 # FIXME: get these working
 724                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 725                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'></script><![endif]-->";
 726                 return $ret;
 727         }
 728 }
 729 ?>