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