includes/OutputPage.php

   1 <?php
   2 # See design.doc
   3
   4 if($wgUseTeX) require_once( "Math.php" );
   5
   6 class OutputPage {
   7         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
   8         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
   9         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  10         var $mSubtitle, $mRedirect;
  11         var $mLastModified, $mCategoryLinks;
  12         var $mScripts;
  13
  14         var $mSuppressQuickbar;
  15         var $mOnloadHandler;
  16         var $mDoNothing;
  17         var $mContainsOldMagic, $mContainsNewMagic;
  18         var $mIsArticleRelated;
  19         var $mParserOptions;
  20         var $mShowFeedLinks = false;
  21         var $mEnableClientCache = true;
  22
  23         function OutputPage()
  24         {
  25                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  26                 $this->mKeywords = $this->mLinktags = array();
  27                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  28                 $this->mRedirect = $this->mLastModified =
  29                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  30                 $this->mOnloadHandler = "";
  31                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  32                 $this->mSuppressQuickbar = $this->mPrintable = false;
  33                 $this->mLanguageLinks = array();
  34                 $this->mCategoryLinks = array() ;
  35                 $this->mDoNothing = false;
  36                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  37                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  38                 $this->mSquidMaxage = 0;
  39                 $this->mScripts = "";
  40         }
  41
  42         function addHeader( $name, $val ) { array_push( $this->mHeaders, "$name: $val" ) ; }
  43         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  44         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  45
  46         # To add an http-equiv meta tag, precede the name with "http:"
  47         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  48         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  49         function addScript( $script ) { $this->mScripts .= $script; }
  50         function getScript() { return $this->mScripts; }
  51
  52         function addLink( $linkarr ) {
  53                 # $linkarr should be an associative array of attributes. We'll escape on output.
  54                 array_push( $this->mLinktags, $linkarr );
  55         }
  56
  57         function addMetadataLink( $linkarr ) {
  58                 # note: buggy CC software only reads first "meta" link
  59                 static $haveMeta = false;
  60                 $linkarr["rel"] = ($haveMeta) ? "alternate meta" : "meta";
  61                 $this->addLink( $linkarr );
  62                 $haveMeta = true;
  63         }
  64
  65         # checkLastModified tells the client to use the client-cached page if
  66         # possible. If sucessful, the OutputPage is disabled so that
  67         # any future call to OutputPage->output() have no effect. The method
  68         # returns true iff cache-ok headers was sent.
  69         function checkLastModified ( $timestamp )
  70         {
  71                 global $wgLang, $wgCachePages, $wgUser;
  72                 if( !$wgCachePages ) {
  73                         wfDebug( "CACHE DISABLED\n", false );
  74                         return;
  75                 }
  76                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  77                         # IE 5.0 has probs with our caching
  78                         wfDebug( "-- bad client, not caching\n", false );
  79                         return;
  80                 }
  81                 if( $wgUser->getOption( "nocache" ) ) {
  82                         wfDebug( "USER DISABLED CACHE\n", false );
  83                         return;
  84                 }
  85
  86                 $lastmod = gmdate( "D, j M Y H:i:s", wfTimestamp2Unix( max( $timestamp, $wgUser->mTouched ) ) ) . " GMT";
  87
  88                 if( !empty( $_SERVER["HTTP_IF_MODIFIED_SINCE"] ) ) {
  89                         # IE sends sizes after the date like this:
  90                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
  91                         # this breaks strtotime().
  92                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
  93                         $ismodsince = wfUnix2Timestamp( strtotime( $modsince ) );
  94                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
  95                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
  96
  97                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
  98                                 # Make sure you're in a place you can leave when you call us!
  99                                 header( "HTTP/1.0 304 Not Modified" );
 100                                 $this->mLastModified = $lastmod;
 101                                 $this->sendCacheControl();
 102                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 103                                 $this->disable();
 104                                 return true;
 105                         } else {
 106                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 107                                 $this->mLastModified = $lastmod;
 108                         }
 109                 } else {
 110                         wfDebug( "We're confused.\n", false );
 111                         $this->mLastModified = $lastmod;
 112                 }
 113         }
 114
 115         function getPageTitleActionText () {
 116                 global $action;
 117                 switch($action) {
 118                         case 'edit':
 119                                 return wfMsg('edit');
 120                         case 'history':
 121                                 return wfMsg('history_short');
 122                         case 'protect':
 123                                 return wfMsg('protect');
 124                         case 'unprotect':
 125                                 return wfMsg('unprotect');
 126                         case 'delete':
 127                                 return wfMsg('delete');
 128                         case 'watch':
 129                                 return wfMsg('watch');
 130                         case 'unwatch':
 131                                 return wfMsg('unwatch');
 132                         case 'submit':
 133                                 return wfMsg('preview');
 134                         case 'info':
 135                                 return wfMsg('info_short');
 136                         default:
 137                                 return '';
 138                 }
 139         }
 140         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 141         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 142         function setPageTitle( $name ) {
 143                 global $action;
 144                 $this->mPagetitle = $name;
 145                 if(!empty($action)) {
 146                         $taction =  $this->getPageTitleActionText();
 147                         if( !empty( $taction ) ) {
 148                                 $name .= " - $taction";
 149                         }
 150                 }
 151                 $this->setHTMLTitle( $name . " - " . wfMsg( "wikititlesuffix" ) );
 152         }
 153         function getHTMLTitle() { return $this->mHTMLtitle; }
 154         function getPageTitle() { return $this->mPagetitle; }
 155         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 156         function getSubtitle() { return $this->mSubtitle; }
 157         function isArticle() { return $this->mIsarticle; }
 158         function setPrintable() { $this->mPrintable = true; }
 159         function isPrintable() { return $this->mPrintable; }
 160         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 161         function isSyndicated() { return $this->mShowFeedLinks; }
 162         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 163         function getOnloadHandler() { return $this->mOnloadHandler; }
 164         function disable() { $this->mDoNothing = true; }
 165
 166         function setArticleRelated( $v )
 167         {
 168                 $this->mIsArticleRelated = $v;
 169                 if ( !$v ) {
 170                         $this->mIsarticle = false;
 171                 }
 172         }
 173         function setArticleFlag( $v ) {
 174                 $this->mIsarticle = $v;
 175                 if ( $v ) {
 176                         $this->mIsArticleRelated = $v;
 177                 }
 178         }
 179
 180         function isArticleRelated()
 181         {
 182                 return $this->mIsArticleRelated;
 183         }
 184
 185         function getLanguageLinks() {
 186                 return $this->mLanguageLinks;
 187         }
 188         function addLanguageLinks($newLinkArray) {
 189                 $this->mLanguageLinks += $newLinkArray;
 190         }
 191         function setLanguageLinks($newLinkArray) {
 192                 $this->mLanguageLinks = $newLinkArray;
 193         }
 194         function getCategoryLinks() {
 195                 return $this->mCategoryLinks;
 196         }
 197         function addCategoryLinks($newLinkArray) {
 198                 $this->mCategoryLinks += $newLinkArray;
 199         }
 200         function setCategoryLinks($newLinkArray) {
 201                 $this->mCategoryLinks += $newLinkArray;
 202         }
 203
 204         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 205         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 206
 207         function addHTML( $text ) { $this->mBodytext .= $text; }
 208         function debug( $text ) { $this->mDebugtext .= $text; }
 209
 210         function setParserOptions( $options )
 211         {
 212                 return wfSetVar( $this->mParserOptions, $options );
 213         }
 214
 215         # First pass--just handle <nowiki> sections, pass the rest off
 216         # to doWikiPass2() which does all the real work.
 217         #
 218         # $cacheArticle - assume this text is the main text for the given article
 219         #
 220         function addWikiText( $text, $linestart = true, $cacheArticle = NULL )
 221         {
 222                 global $wgParser, $wgParserCache, $wgUser, $wgTitle;
 223
 224                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 225                 if ( $cacheArticle ) {
 226                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 227                 }
 228
 229                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 230                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 231                 $this->addHTML( $parserOutput->getText() );
 232         }
 233
 234         function tryParserCache( $article, $user ) {
 235                 global $wgParserCache;
 236                 $parserOutput = $wgParserCache->get( $article, $user );
 237                 if ( $parserOutput !== false ) {
 238                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 239                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 240                         $this->addHTML( $parserOutput->getText() );
 241                         return true;
 242                 } else {
 243                         return false;
 244                 }
 245         }
 246
 247         # Set the maximum cache time on the Squid in seconds
 248         function setSquidMaxage( $maxage ) {
 249                 $this->mSquidMaxage = $maxage;
 250         }
 251
 252         # Use enableClientCache(false) to force it to send nocache headers
 253         function enableClientCache( $state ) {
 254                 return wfSetVar( $this->mEnableClientCache, $state );
 255         }
 256
 257         function sendCacheControl() {
 258                 global $wgUseSquid, $wgUseESI;
 259                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 260                 header( "Vary: Accept-Encoding, Cookie" );
 261                 if( $this->mEnableClientCache ) {
 262                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( "session.name") ] ) &&
 263                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 264                         {
 265                                 if ( $wgUseESI ) {
 266                                         # We'll purge the proxy cache explicitly, but require end user agents
 267                                         # to revalidate against the proxy on each visit.
 268                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 269                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 270                                         # start with a shorter timeout for initial testing
 271                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 272                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 273                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 274                                 } else {
 275                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 276                                         # to revalidate against the proxy on each visit.
 277                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 278                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 279                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 280                                         # start with a shorter timeout for initial testing
 281                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 282                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 283                                 }
 284                         } else {
 285                                 # We do want clients to cache if they can, but they *must* check for updates
 286                                 # on revisiting the page.
 287                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 288                                 header( "Expires: -1" );
 289                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 290                         }
 291                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 292                 } else {
 293                         wfDebug( "** no caching **\n", false );
 294
 295                         # In general, the absence of a last modified header should be enough to prevent
 296                         # the client from using its cache. We send a few other things just to make sure.
 297                         header( "Expires: -1" );
 298                         header( "Cache-Control: no-cache, no-store, max-age=0, must-revalidate" );
 299                         header( "Pragma: no-cache" );
 300                 }
 301         }
 302
 303         # Finally, all the text has been munged and accumulated into
 304         # the object, let's actually output it:
 305         #
 306         function output()
 307         {
 308                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 309                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 310                 global $wgDebugRedirects, $wgMimeType;
 311                 if( $this->mDoNothing ){
 312                         return;
 313                 }
 314                 $fname = "OutputPage::output";
 315                 wfProfileIn( $fname );
 316
 317                 $sk = $wgUser->getSkin();
 318
 319                 if ( "" != $this->mRedirect ) {
 320                         if( substr( $this->mRedirect, 0, 4 ) != "http" ) {
 321                                 # Standards require redirect URLs to be absolute
 322                                 global $wgServer;
 323                                 $this->mRedirect = $wgServer . $this->mRedirect;
 324                         }
 325                         if( $this->mRedirectCode == '301') {
 326                                 if( !$wgDebugRedirects ) {
 327                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 328                                 }
 329                                 $this->mLastModified = gmdate( "D, j M Y H:i:s" ) . " GMT";
 330                         }
 331
 332                         $this->sendCacheControl();
 333
 334                         if( $wgDebugRedirects ) {
 335                                 $url = htmlspecialchars( $this->mRedirect );
 336                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 337                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 338                                 print "</body>\n</html>\n";
 339                         } else {
 340                                 header( "Location: {$this->mRedirect}" );
 341                         }
 342                         return;
 343                 }
 344
 345
 346                 $this->sendCacheControl();
 347
 348                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 349                 header( "Content-language: {$wgLanguageCode}" );
 350
 351                 $exp = time() + $wgCookieExpiration;
 352                 foreach( $this->mCookies as $name => $val ) {
 353                         setcookie( $name, $val, $exp, "/" );
 354                 }
 355
 356                 $sk->outputPage( $this );
 357                 # flush();
 358         }
 359
 360         function out( $ins )
 361         {
 362                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 363                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 364                         $outs = $ins;
 365                 } else {
 366                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 367                         if ( false === $outs ) { $outs = $ins; }
 368                 }
 369                 print $outs;
 370         }
 371
 372         function setEncodings()
 373         {
 374                 global $wgInputEncoding, $wgOutputEncoding;
 375                 global $wgUser, $wgLang;
 376
 377                 $wgInputEncoding = strtolower( $wgInputEncoding );
 378
 379                 if( $wgUser->getOption( 'altencoding' ) ) {
 380                         $wgLang->setAltEncoding();
 381                         return;
 382                 }
 383
 384                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 385                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 386                         return;
 387                 }
 388
 389                 /*
 390                 # This code is unused anyway!
 391                 # Commenting out. --bv 2003-11-15
 392
 393                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 394                 $best = 0.0;
 395                 $bestset = "*";
 396
 397                 foreach ( $a as $s ) {
 398                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 399                                 $set = $m[1];
 400                                 $q = (float)($m[2]);
 401                         } else {
 402                                 $set = $s;
 403                                 $q = 1.0;
 404                         }
 405                         if ( $q > $best ) {
 406                                 $bestset = $set;
 407                                 $best = $q;
 408                         }
 409                 }
 410                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 411                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 412                 $wgOutputEncoding = strtolower( $bestset );
 413
 414 # Disable for now
 415 #
 416                 */
 417                 $wgOutputEncoding = $wgInputEncoding;
 418         }
 419
 420         # Returns a HTML comment with the elapsed time since request.
 421         # This method has no side effects.
 422         function reportTime()
 423         {
 424                 global $wgRequestTime;
 425
 426                 $now = wfTime();
 427                 list( $usec, $sec ) = explode( " ", $wgRequestTime );
 428                 $start = (float)$sec + (float)$usec;
 429                 $elapsed = $now - $start;
 430
 431                 # Use real server name if available, so we know which machine
 432                 # in a server farm generated the current page.
 433                 if ( function_exists( "posix_uname" ) ) {
 434                         $uname = @posix_uname();
 435                 } else {
 436                         $uname = false;
 437                 }
 438                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 439                         $hostname = $uname['nodename'];
 440                 } else {
 441                         # This may be a virtual server.
 442                         $hostname = $_SERVER['SERVER_NAME'];
 443                 }
 444                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 445                   $hostname, $elapsed );
 446                 return $com;
 447         }
 448
 449         # Note: these arguments are keys into wfMsg(), not text!
 450         #
 451         function errorpage( $title, $msg )
 452         {
 453                 global $wgTitle;
 454
 455                 $this->mDebugtext .= "Original title: " .
 456                   $wgTitle->getPrefixedText() . "\n";
 457                 $this->setPageTitle( wfMsg( $title ) );
 458                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 459                 $this->setRobotpolicy( "noindex,nofollow" );
 460                 $this->setArticleRelated( false );
 461                 $this->enableClientCache( false );
 462
 463                 $this->mBodytext = "";
 464                 $this->addHTML( "<p>" . wfMsg( $msg ) . "</p>\n" );
 465                 $this->returnToMain( false );
 466
 467                 $this->output();
 468                 wfAbruptExit();
 469         }
 470
 471         function sysopRequired()
 472         {
 473                 global $wgUser;
 474
 475                 $this->setPageTitle( wfMsg( "sysoptitle" ) );
 476                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 477                 $this->setRobotpolicy( "noindex,nofollow" );
 478                 $this->setArticleRelated( false );
 479                 $this->mBodytext = "";
 480
 481                 $sk = $wgUser->getSkin();
 482                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 483                 $this->addHTML( wfMsg( "sysoptext", $ap ) );
 484                 $this->returnToMain();
 485         }
 486
 487         function developerRequired()
 488         {
 489                 global $wgUser;
 490
 491                 $this->setPageTitle( wfMsg( "developertitle" ) );
 492                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 493                 $this->setRobotpolicy( "noindex,nofollow" );
 494                 $this->setArticleRelated( false );
 495                 $this->mBodytext = "";
 496
 497                 $sk = $wgUser->getSkin();
 498                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 499                 $this->addHTML( wfMsg( "developertext", $ap ) );
 500                 $this->returnToMain();
 501         }
 502
 503         function loginToUse()
 504         {
 505                 global $wgUser, $wgTitle, $wgLang;
 506
 507                 $this->setPageTitle( wfMsg( "loginreqtitle" ) );
 508                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 509                 $this->setRobotpolicy( "noindex,nofollow" );
 510                 $this->setArticleFlag( false );
 511                 $this->mBodytext = "";
 512                 $this->addWikiText( wfMsg( "loginreqtext" ) );
 513
 514                 # We put a comment in the .html file so a Sysop can diagnose the page the
 515                 # user can't see.
 516                 $this->addHTML( "\n<!--" .
 517                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 518                                                 ":" .
 519                                                 $wgTitle->getDBkey() . "-->" );
 520                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 521         }
 522
 523         function databaseError( $fname, $sql, $error, $errno )
 524         {
 525                 global $wgUser, $wgCommandLineMode;
 526
 527                 $this->setPageTitle( wfMsgNoDB( "databaseerror" ) );
 528                 $this->setRobotpolicy( "noindex,nofollow" );
 529                 $this->setArticleRelated( false );
 530                 $this->enableClientCache( false );
 531
 532                 if ( $wgCommandLineMode ) {
 533                         $msg = wfMsgNoDB( "dberrortextcl" );
 534                 } else {
 535                         $msg = wfMsgNoDB( "dberrortext" );
 536                 }
 537
 538                 $msg = str_replace( "$1", htmlspecialchars( $sql ), $msg );
 539                 $msg = str_replace( "$2", htmlspecialchars( $fname ), $msg );
 540                 $msg = str_replace( "$3", $errno, $msg );
 541                 $msg = str_replace( "$4", htmlspecialchars( $error ), $msg );
 542
 543                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 544                         print "$msg\n";
 545                         wfAbruptExit();
 546                 }
 547                 $sk = $wgUser->getSkin();
 548                 $shlink = $sk->makeKnownLink( wfMsgNoDB( "searchhelppage" ),
 549                   wfMsgNoDB( "searchingwikipedia" ) );
 550                 $msg = str_replace( "$5", $shlink, $msg );
 551                 $this->mBodytext = $msg;
 552                 $this->output();
 553                 wfAbruptExit();
 554         }
 555
 556         function readOnlyPage( $source = null, $protected = false )
 557         {
 558                 global $wgUser, $wgReadOnlyFile;
 559
 560                 $this->setRobotpolicy( "noindex,nofollow" );
 561                 $this->setArticleRelated( false );
 562
 563                 if( $protected ) {
 564                         $this->setPageTitle( wfMsg( "viewsource" ) );
 565                         $this->addWikiText( wfMsg( "protectedtext" ) );
 566                 } else {
 567                         $this->setPageTitle( wfMsg( "readonly" ) );
 568                         $reason = file_get_contents( $wgReadOnlyFile );
 569                         $this->addWikiText( wfMsg( "readonlytext", $reason ) );
 570                 }
 571
 572                 if( is_string( $source ) ) {
 573                         if( strcmp( $source, "" ) == 0 ) {
 574                                 $source = wfMsg( "noarticletext" );
 575                         }
 576                         $rows = $wgUser->getOption( "rows" );
 577                         $cols = $wgUser->getOption( "cols" );
 578                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 579                                 htmlspecialchars( $source ) . "\n</textarea>";
 580                         $this->addHTML( $text );
 581                 }
 582
 583                 $this->returnToMain( false );
 584         }
 585
 586         function fatalError( $message )
 587         {
 588                 $this->setPageTitle( wfMsg( "internalerror" ) );
 589                 $this->setRobotpolicy( "noindex,nofollow" );
 590                 $this->setArticleRelated( false );
 591                 $this->enableClientCache( false );
 592
 593                 $this->mBodytext = $message;
 594                 $this->output();
 595                 wfAbruptExit();
 596         }
 597
 598         function unexpectedValueError( $name, $val )
 599         {
 600                 $this->fatalError( wfMsg( "unexpected", $name, $val ) );
 601         }
 602
 603         function fileCopyError( $old, $new )
 604         {
 605                 $this->fatalError( wfMsg( "filecopyerror", $old, $new ) );
 606         }
 607
 608         function fileRenameError( $old, $new )
 609         {
 610                 $this->fatalError( wfMsg( "filerenameerror", $old, $new ) );
 611         }
 612
 613         function fileDeleteError( $name )
 614         {
 615                 $this->fatalError( wfMsg( "filedeleteerror", $name ) );
 616         }
 617
 618         function fileNotFoundError( $name )
 619         {
 620                 $this->fatalError( wfMsg( "filenotfound", $name ) );
 621         }
 622
 623         // return from error messages or notes
 624         //   auto:      automatically redirect the user after 10 seconds
 625         //   returnto:  page title to return to. Default is Main Page.
 626         function returnToMain( $auto = true, $returnto = NULL )
 627         {
 628                 global $wgUser, $wgOut, $wgRequest;
 629
 630                 if ( $returnto == NULL ) {
 631                         $returnto = $wgRequest->getText( 'returnto' );
 632                 }
 633
 634                 $sk = $wgUser->getSkin();
 635                 if ( "" == $returnto ) {
 636                         $returnto = wfMsg( "mainpage" );
 637                 }
 638                 $link = $sk->makeKnownLink( $returnto, "" );
 639
 640                 $r = wfMsg( "returnto", $link );
 641                 if ( $auto ) {
 642                         $titleObj = Title::newFromText( $returnto );
 643                         $wgOut->addMeta( "http:Refresh", "10;url=" . $titleObj->escapeFullURL() );
 644                 }
 645                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 646         }
 647
 648         # This function takes the existing and broken links for the page
 649         # and uses the first 10 of them for META keywords
 650         function addMetaTags ()
 651         {
 652                 global $wgLinkCache , $wgOut ;
 653                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 654                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 655                 $a = array_merge ( $good , $bad ) ;
 656                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 657                 $a = implode ( "," , $a ) ;
 658                 $strip = array(
 659                         "/<.*?>/" => '',
 660                         "/[_]/" => ' '
 661                 );
 662                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 663
 664                 $wgOut->addMeta ( "KEYWORDS" , $a ) ;
 665         }
 666
 667         /* private */ function headElement()
 668         {
 669                 global $wgDocType, $wgDTD, $wgLanguageCode, $wgOutputEncoding, $wgMimeType;
 670                 global $wgUser, $wgLang, $wgRequest;
 671
 672                 $xml = ($wgMimeType == 'text/xml');
 673                 if( $xml ) {
 674                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 675                 } else {
 676                         $ret = "";
 677                 }
 678
 679                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 680
 681                 if ( "" == $this->mHTMLtitle ) {
 682                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 683                 }
 684                 if( $xml ) {
 685                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 686                 } else {
 687                         $xmlbits = "";
 688                 }
 689                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : "";
 690                 $ret .= "<html $xmlbits lang=\"$wgLanguageCode\" $rtl>\n";
 691                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 692                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 693
 694                 $ret .= $this->getHeadLinks();
 695                 global $wgStylePath;
 696                 if( $this->isPrintable() ) {
 697                         $media = "";
 698                 } else {
 699                         $media = "media='print'";
 700                 }
 701                 $printsheet = htmlspecialchars( "$wgStylePath/wikiprintable.css" );
 702                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 703
 704                 $sk = $wgUser->getSkin();
 705                 $ret .= $sk->getHeadScripts();
 706                 $ret .= $this->mScripts;
 707                 $ret .= $sk->getUserStyles();
 708
 709                 $ret .= "</head>\n";
 710                 return $ret;
 711         }
 712
 713         function getHeadLinks() {
 714                 global $wgRequest, $wgStylePath;
 715                 $ret = "";
 716                 foreach ( $this->mMetatags as $tag ) {
 717                         if ( 0 == strcasecmp( "http:", substr( $tag[0], 0, 5 ) ) ) {
 718                                 $a = "http-equiv";
 719                                 $tag[0] = substr( $tag[0], 5 );
 720                         } else {
 721                                 $a = "name";
 722                         }
 723                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 724                 }
 725                 $p = $this->mRobotpolicy;
 726                 if ( "" == $p ) { $p = "index,follow"; }
 727                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 728
 729                 if ( count( $this->mKeywords ) > 0 ) {
 730                         $strip = array(
 731                                 "/<.*?>/" => '',
 732                                 "/[_]/" => ' '
 733                         );
 734                         $ret .= "<meta name=\"keywords\" content=\"" .
 735                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 736                 }
 737                 foreach ( $this->mLinktags as $tag ) {
 738                         $ret .= "<link";
 739                         foreach( $tag as $attr => $val ) {
 740                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 741                         }
 742                         $ret .= " />\n";
 743                 }
 744                 if( $this->isSyndicated() ) {
 745                         # FIXME: centralize the mime-type and name information in Feed.php
 746                         $link = $wgRequest->escapeAppendQuery( "feed=rss" );
 747                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 748                         $link = $wgRequest->escapeAppendQuery( "feed=atom" );
 749                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 750                 }
 751                 # FIXME: get these working
 752                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 753                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'></script><![endif]-->";
 754                 return $ret;
 755         }
 756 }
 757 ?>