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, $wgProfiler;
 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                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 343                         return;
 344                 }
 345
 346
 347                 $this->sendCacheControl();
 348                 # Perform link colouring
 349                 $this->mBodytext = $this->parseLinkHolders();
 350
 351                 # Disable temporary placeholders, so that the skin produces HTML
 352                 $sk->postParseLinkColour( false );
 353
 354                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 355                 header( "Content-language: {$wgLanguageCode}" );
 356
 357                 $exp = time() + $wgCookieExpiration;
 358                 foreach( $this->mCookies as $name => $val ) {
 359                         setcookie( $name, $val, $exp, "/" );
 360                 }
 361
 362                 $sk->outputPage( $this );
 363                 # flush();
 364         }
 365
 366         function out( $ins )
 367         {
 368                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 369                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 370                         $outs = $ins;
 371                 } else {
 372                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 373                         if ( false === $outs ) { $outs = $ins; }
 374                 }
 375                 print $outs;
 376         }
 377
 378         function setEncodings()
 379         {
 380                 global $wgInputEncoding, $wgOutputEncoding;
 381                 global $wgUser, $wgLang;
 382
 383                 $wgInputEncoding = strtolower( $wgInputEncoding );
 384
 385                 if( $wgUser->getOption( 'altencoding' ) ) {
 386                         $wgLang->setAltEncoding();
 387                         return;
 388                 }
 389
 390                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 391                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 392                         return;
 393                 }
 394
 395                 /*
 396                 # This code is unused anyway!
 397                 # Commenting out. --bv 2003-11-15
 398
 399                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 400                 $best = 0.0;
 401                 $bestset = "*";
 402
 403                 foreach ( $a as $s ) {
 404                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 405                                 $set = $m[1];
 406                                 $q = (float)($m[2]);
 407                         } else {
 408                                 $set = $s;
 409                                 $q = 1.0;
 410                         }
 411                         if ( $q > $best ) {
 412                                 $bestset = $set;
 413                                 $best = $q;
 414                         }
 415                 }
 416                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 417                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 418                 $wgOutputEncoding = strtolower( $bestset );
 419
 420 # Disable for now
 421 #
 422                 */
 423                 $wgOutputEncoding = $wgInputEncoding;
 424         }
 425
 426         # Returns a HTML comment with the elapsed time since request.
 427         # This method has no side effects.
 428         function reportTime()
 429         {
 430                 global $wgRequestTime;
 431
 432                 $now = wfTime();
 433                 list( $usec, $sec ) = explode( " ", $wgRequestTime );
 434                 $start = (float)$sec + (float)$usec;
 435                 $elapsed = $now - $start;
 436
 437                 # Use real server name if available, so we know which machine
 438                 # in a server farm generated the current page.
 439                 if ( function_exists( "posix_uname" ) ) {
 440                         $uname = @posix_uname();
 441                 } else {
 442                         $uname = false;
 443                 }
 444                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 445                         $hostname = $uname['nodename'];
 446                 } else {
 447                         # This may be a virtual server.
 448                         $hostname = $_SERVER['SERVER_NAME'];
 449                 }
 450                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 451                   $hostname, $elapsed );
 452                 return $com;
 453         }
 454
 455         # Note: these arguments are keys into wfMsg(), not text!
 456         #
 457         function errorpage( $title, $msg )
 458         {
 459                 global $wgTitle;
 460
 461                 $this->mDebugtext .= "Original title: " .
 462                   $wgTitle->getPrefixedText() . "\n";
 463                 $this->setPageTitle( wfMsg( $title ) );
 464                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 465                 $this->setRobotpolicy( "noindex,nofollow" );
 466                 $this->setArticleRelated( false );
 467                 $this->enableClientCache( false );
 468                 $this->mRedirect = "";
 469
 470                 $this->mBodytext = "";
 471                 $this->addHTML( "<p>" . wfMsg( $msg ) . "</p>\n" );
 472                 $this->returnToMain( false );
 473
 474                 $this->output();
 475                 wfErrorExit();
 476         }
 477
 478         function sysopRequired()
 479         {
 480                 global $wgUser;
 481
 482                 $this->setPageTitle( wfMsg( "sysoptitle" ) );
 483                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 484                 $this->setRobotpolicy( "noindex,nofollow" );
 485                 $this->setArticleRelated( false );
 486                 $this->mBodytext = "";
 487
 488                 $sk = $wgUser->getSkin();
 489                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 490                 $this->addHTML( wfMsg( "sysoptext", $ap ) );
 491                 $this->returnToMain();
 492         }
 493
 494         function developerRequired()
 495         {
 496                 global $wgUser;
 497
 498                 $this->setPageTitle( wfMsg( "developertitle" ) );
 499                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 500                 $this->setRobotpolicy( "noindex,nofollow" );
 501                 $this->setArticleRelated( false );
 502                 $this->mBodytext = "";
 503
 504                 $sk = $wgUser->getSkin();
 505                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 506                 $this->addHTML( wfMsg( "developertext", $ap ) );
 507                 $this->returnToMain();
 508         }
 509
 510         function loginToUse()
 511         {
 512                 global $wgUser, $wgTitle, $wgLang;
 513
 514                 $this->setPageTitle( wfMsg( "loginreqtitle" ) );
 515                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 516                 $this->setRobotpolicy( "noindex,nofollow" );
 517                 $this->setArticleFlag( false );
 518                 $this->mBodytext = "";
 519                 $this->addWikiText( wfMsg( "loginreqtext" ) );
 520
 521                 # We put a comment in the .html file so a Sysop can diagnose the page the
 522                 # user can't see.
 523                 $this->addHTML( "\n<!--" .
 524                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 525                                                 ":" .
 526                                                 $wgTitle->getDBkey() . "-->" );
 527                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 528         }
 529
 530         function databaseError( $fname, $sql, $error, $errno )
 531         {
 532                 global $wgUser, $wgCommandLineMode;
 533
 534                 $this->setPageTitle( wfMsgNoDB( "databaseerror" ) );
 535                 $this->setRobotpolicy( "noindex,nofollow" );
 536                 $this->setArticleRelated( false );
 537                 $this->enableClientCache( false );
 538                 $this->mRedirect = "";
 539
 540                 if ( $wgCommandLineMode ) {
 541                         $msg = wfMsgNoDB( "dberrortextcl", htmlspecialchars( $sql ),
 542                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 543                 } else {
 544                         $msg = wfMsgNoDB( "dberrortext", htmlspecialchars( $sql ),
 545                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 546                 }
 547
 548                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 549                         print "$msg\n";
 550                         wfErrorExit();
 551                 }
 552                 $sk = $wgUser->getSkin();
 553                 $shlink = $sk->makeKnownLink( wfMsgNoDB( "searchhelppage" ),
 554                   wfMsgNoDB( "searchingwikipedia" ) );
 555                 $msg = str_replace( "$5", $shlink, $msg );
 556                 $this->mBodytext = $msg;
 557                 $this->output();
 558                 wfErrorExit();
 559         }
 560
 561         function readOnlyPage( $source = null, $protected = false )
 562         {
 563                 global $wgUser, $wgReadOnlyFile;
 564
 565                 $this->setRobotpolicy( "noindex,nofollow" );
 566                 $this->setArticleRelated( false );
 567
 568                 if( $protected ) {
 569                         $this->setPageTitle( wfMsg( "viewsource" ) );
 570                         $this->addWikiText( wfMsg( "protectedtext" ) );
 571                 } else {
 572                         $this->setPageTitle( wfMsg( "readonly" ) );
 573                         $reason = file_get_contents( $wgReadOnlyFile );
 574                         $this->addWikiText( wfMsg( "readonlytext", $reason ) );
 575                 }
 576
 577                 if( is_string( $source ) ) {
 578                         if( strcmp( $source, "" ) == 0 ) {
 579                                 $source = wfMsg( "noarticletext" );
 580                         }
 581                         $rows = $wgUser->getOption( "rows" );
 582                         $cols = $wgUser->getOption( "cols" );
 583                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 584                                 htmlspecialchars( $source ) . "\n</textarea>";
 585                         $this->addHTML( $text );
 586                 }
 587
 588                 $this->returnToMain( false );
 589         }
 590
 591         function fatalError( $message )
 592         {
 593                 $this->setPageTitle( wfMsg( "internalerror" ) );
 594                 $this->setRobotpolicy( "noindex,nofollow" );
 595                 $this->setArticleRelated( false );
 596                 $this->enableClientCache( false );
 597                 $this->mRedirect = "";
 598
 599                 $this->mBodytext = $message;
 600                 $this->output();
 601                 wfErrorExit();
 602         }
 603
 604         function unexpectedValueError( $name, $val )
 605         {
 606                 $this->fatalError( wfMsg( "unexpected", $name, $val ) );
 607         }
 608
 609         function fileCopyError( $old, $new )
 610         {
 611                 $this->fatalError( wfMsg( "filecopyerror", $old, $new ) );
 612         }
 613
 614         function fileRenameError( $old, $new )
 615         {
 616                 $this->fatalError( wfMsg( "filerenameerror", $old, $new ) );
 617         }
 618
 619         function fileDeleteError( $name )
 620         {
 621                 $this->fatalError( wfMsg( "filedeleteerror", $name ) );
 622         }
 623
 624         function fileNotFoundError( $name )
 625         {
 626                 $this->fatalError( wfMsg( "filenotfound", $name ) );
 627         }
 628
 629         // return from error messages or notes
 630         //   auto:      automatically redirect the user after 10 seconds
 631         //   returnto:  page title to return to. Default is Main Page.
 632         function returnToMain( $auto = true, $returnto = NULL )
 633         {
 634                 global $wgUser, $wgOut, $wgRequest;
 635
 636                 if ( $returnto == NULL ) {
 637                         $returnto = $wgRequest->getText( 'returnto' );
 638                 }
 639
 640                 $sk = $wgUser->getSkin();
 641                 if ( "" == $returnto ) {
 642                         $returnto = wfMsg( "mainpage" );
 643                 }
 644                 $link = $sk->makeKnownLink( $returnto, "" );
 645
 646                 $r = wfMsg( "returnto", $link );
 647                 if ( $auto ) {
 648                         $titleObj = Title::newFromText( $returnto );
 649                         $wgOut->addMeta( "http:Refresh", "10;url=" . $titleObj->escapeFullURL() );
 650                 }
 651                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 652         }
 653
 654         # This function takes the existing and broken links for the page
 655         # and uses the first 10 of them for META keywords
 656         function addMetaTags ()
 657         {
 658                 global $wgLinkCache , $wgOut ;
 659                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 660                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 661                 $a = array_merge ( $good , $bad ) ;
 662                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 663                 $a = implode ( "," , $a ) ;
 664                 $strip = array(
 665                         "/<.*?>/" => '',
 666                         "/[_]/" => ' '
 667                 );
 668                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 669
 670                 $wgOut->addMeta ( "KEYWORDS" , $a ) ;
 671         }
 672
 673         /* private */ function headElement()
 674         {
 675                 global $wgDocType, $wgDTD, $wgLanguageCode, $wgOutputEncoding, $wgMimeType;
 676                 global $wgUser, $wgLang, $wgRequest;
 677
 678                 $xml = ($wgMimeType == 'text/xml');
 679                 if( $xml ) {
 680                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 681                 } else {
 682                         $ret = "";
 683                 }
 684
 685                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 686
 687                 if ( "" == $this->mHTMLtitle ) {
 688                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 689                 }
 690                 if( $xml ) {
 691                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 692                 } else {
 693                         $xmlbits = "";
 694                 }
 695                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : "";
 696                 $ret .= "<html $xmlbits lang=\"$wgLanguageCode\" $rtl>\n";
 697                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 698                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 699
 700                 $ret .= $this->getHeadLinks();
 701                 global $wgStylePath;
 702                 if( $this->isPrintable() ) {
 703                         $media = "";
 704                 } else {
 705                         $media = "media='print'";
 706                 }
 707                 $printsheet = htmlspecialchars( "$wgStylePath/wikiprintable.css" );
 708                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 709
 710                 $sk = $wgUser->getSkin();
 711                 $ret .= $sk->getHeadScripts();
 712                 $ret .= $this->mScripts;
 713                 $ret .= $sk->getUserStyles();
 714
 715                 $ret .= "</head>\n";
 716                 return $ret;
 717         }
 718
 719         function getHeadLinks() {
 720                 global $wgRequest, $wgStylePath;
 721                 $ret = "";
 722                 foreach ( $this->mMetatags as $tag ) {
 723                         if ( 0 == strcasecmp( "http:", substr( $tag[0], 0, 5 ) ) ) {
 724                                 $a = "http-equiv";
 725                                 $tag[0] = substr( $tag[0], 5 );
 726                         } else {
 727                                 $a = "name";
 728                         }
 729                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 730                 }
 731                 $p = $this->mRobotpolicy;
 732                 if ( "" == $p ) { $p = "index,follow"; }
 733                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 734
 735                 if ( count( $this->mKeywords ) > 0 ) {
 736                         $strip = array(
 737                                 "/<.*?>/" => '',
 738                                 "/[_]/" => ' '
 739                         );
 740                         $ret .= "<meta name=\"keywords\" content=\"" .
 741                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 742                 }
 743                 foreach ( $this->mLinktags as $tag ) {
 744                         $ret .= "<link";
 745                         foreach( $tag as $attr => $val ) {
 746                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 747                         }
 748                         $ret .= " />\n";
 749                 }
 750                 if( $this->isSyndicated() ) {
 751                         # FIXME: centralize the mime-type and name information in Feed.php
 752                         $link = $wgRequest->escapeAppendQuery( "feed=rss" );
 753                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 754                         $link = $wgRequest->escapeAppendQuery( "feed=atom" );
 755                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 756                 }
 757                 # FIXME: get these working
 758                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 759                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 760                 return $ret;
 761         }
 762
 763         # Parse <!--LINK--> link placeholders to avoid using linkcache
 764         # Placeholders created in Skin::makeLinkObj()
 765         function parseLinkHolders()
 766         {
 767                 global $wgUser;
 768
 769                 $fname = 'OutputPage::parseLinkHolders';
 770                 wfProfileIn( $fname );
 771
 772                 # Get placeholders from body
 773                 preg_match_all( "/<!--LINK (.*?) (.*?) (.*?) (.*?)-->/", $this->mBodytext, $tmpLinks );
 774
 775                 if ( !empty( $tmpLinks[0] ) ) {
 776                         $dbr =& wfGetDB( DB_SLAVE );
 777                         $cur = $dbr->tableName( 'cur' );
 778                         $sk = $wgUser->getSkin();
 779                         $threshold = $wgUser->getOption('stubthreshold');
 780
 781                         $namespaces =& $tmpLinks[1];
 782                         $dbkeys =& $tmpLinks[2];
 783                         $queries =& $tmpLinks[3];
 784                         $texts =& $tmpLinks[4];
 785
 786                         # Sort by namespace
 787                         asort( $namespaces );
 788
 789                         # Generate query
 790                         foreach ( $namespaces as $key => $val ) {
 791                                 if ( !isset( $current ) ) {
 792                                         $current = $val;
 793                                         $query =  "SELECT cur_namespace, cur_title";
 794                                         if ( $threshold > 0 ) {
 795                                                 $query .= ", LENGTH(cur_text) AS cur_len, cur_is_redirect";
 796                                         }
 797                                         $query .= " FROM $cur WHERE (cur_namespace=$val AND cur_title IN(";
 798                                 } elseif ( $current != $val ) {
 799                                         $current = $val;
 800                                         $query .= ")) OR (cur_namespace=$val AND cur_title IN(";
 801                                 } else {
 802                                         $query .= ", ";
 803                                 }
 804
 805                                 $query .= $dbr->addQuotes( $dbkeys[$key] );
 806                         }
 807
 808                         $query .= "))";
 809
 810                         $res = $dbr->query( $query, $fname );
 811
 812                         # Fetch data and form into an associative array
 813                         # non-existent = broken
 814                         # 1 = known
 815                         # 2 = stub
 816                         $colours = array();
 817                         while ( $s = $dbr->fetchObject($res) ) {
 818                                 $key = $s->cur_namespace . ' ' . $s->cur_title;
 819                                 if ( $threshold >  0 ) {
 820                                         $size = $s->cur_len;
 821                                         if ( $s->cur_is_redirect || $s->cur_namespace != 0 || $length < $threshold ) {
 822                                                 $colours[$key] = 1;
 823                                         } else {
 824                                                 $colours[$key] = 2;
 825                                         }
 826                                         $colours[$key] = array( $s->cur_len, $s->cur_is_redirect );
 827                                 } else {
 828                                         $colours[$key] = 1;
 829                                 }
 830                         }
 831
 832                         # Construct search and replace arrays
 833                         $search = $replace = array();
 834                         foreach ( $namespaces as $key => $ns ) {
 835                                 $cKey = $ns . ' ' . $dbkeys[$key];
 836                                 $search[] = $tmpLinks[0][$key];
 837                                 $title = Title::makeTitle( $ns, $dbkeys[$key] );
 838                                 if ( empty( $colours[$cKey] ) ) {
 839                                         $replace[] = $sk->makeBrokenLinkObj( $title, $texts[$key], $queries[$key] );
 840                                 } elseif ( $colours[$cKey] == 1 ) {
 841                                         $replace[] = $sk->makeKnownLinkObj( $title, $texts[$key], $queries[$key] );
 842                                 } elseif ( $colours[$cKey] == 2 ) {
 843                                         $replace[] = $sk->makeStubLinkObj( $title, $texts[$key], $queries[$key] );
 844                                 }
 845                         }
 846
 847                         # Do the thing
 848                         $out = str_replace( $search, $replace, $this->mBodytext );
 849                 } else {
 850                         $out = $this->mBodytext;
 851                 }
 852
 853                 wfProfileOut( $fname );
 854                 return ( $out );
 855         }
 856 }
 857 ?>