includes/OutputPage.php

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