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