includes/OutputPage.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  */
   5
   6 /**
   7  * This is not a valid entry point, perform no further processing unless MEDIAWIKI is defined
   8  */
   9 if( defined( 'MEDIAWIKI' ) ) {
  10
  11 # See design.doc
  12
  13 if($wgUseTeX) require_once( 'Math.php' );
  14
  15 /**
  16  * @todo document
  17  * @package MediaWiki
  18  */
  19 class OutputPage {
  20         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  21         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  22         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  23         var $mSubtitle, $mRedirect;
  24         var $mLastModified, $mCategoryLinks;
  25         var $mScripts, $mLinkColours;
  26
  27         var $mSuppressQuickbar;
  28         var $mOnloadHandler;
  29         var $mDoNothing;
  30         var $mContainsOldMagic, $mContainsNewMagic;
  31         var $mIsArticleRelated;
  32         var $mParserOptions;
  33         var $mShowFeedLinks = false;
  34         var $mEnableClientCache = true;
  35
  36         /**
  37          * Constructor
  38          * Initialise private variables
  39          */
  40         function OutputPage() {
  41                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  42                 $this->mKeywords = $this->mLinktags = array();
  43                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  44                 $this->mRedirect = $this->mLastModified =
  45                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  46                 $this->mOnloadHandler = '';
  47                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  48                 $this->mSuppressQuickbar = $this->mPrintable = false;
  49                 $this->mLanguageLinks = array();
  50                 $this->mCategoryLinks = array() ;
  51                 $this->mDoNothing = false;
  52                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  53                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  54                 $this->mSquidMaxage = 0;
  55                 $this->mScripts = '';
  56         }
  57
  58         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  59         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  60         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  61
  62         # To add an http-equiv meta tag, precede the name with "http:"
  63         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  64         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  65         function addScript( $script ) { $this->mScripts .= $script; }
  66         function getScript() { return $this->mScripts; }
  67
  68         function addLink( $linkarr ) {
  69                 # $linkarr should be an associative array of attributes. We'll escape on output.
  70                 array_push( $this->mLinktags, $linkarr );
  71         }
  72
  73         function addMetadataLink( $linkarr ) {
  74                 # note: buggy CC software only reads first "meta" link
  75                 static $haveMeta = false;
  76                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  77                 $this->addLink( $linkarr );
  78                 $haveMeta = true;
  79         }
  80
  81         /**
  82          * checkLastModified tells the client to use the client-cached page if
  83          * possible. If sucessful, the OutputPage is disabled so that
  84          * any future call to OutputPage->output() have no effect. The method
  85          * returns true iff cache-ok headers was sent.
  86          */
  87         function checkLastModified ( $timestamp ) {
  88                 global $wgLang, $wgCachePages, $wgUser;
  89                 $timestamp=wfTimestamp(TS_MW,$timestamp);
  90                 if( !$wgCachePages ) {
  91                         wfDebug( "CACHE DISABLED\n", false );
  92                         return;
  93                 }
  94                 if( isset( $_SERVER["HTTP_USER_AGENT"] ) &&
  95                     preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  96                         # IE 5.0 has probs with our caching
  97                         wfDebug( "-- bad client, not caching\n", false );
  98                         return;
  99                 }
 100                 if( $wgUser->getOption( 'nocache' ) ) {
 101                         wfDebug( "USER DISABLED CACHE\n", false );
 102                         return;
 103                 }
 104
 105                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 106
 107                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 108                         # IE sends sizes after the date like this:
 109                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 110                         # this breaks strtotime().
 111                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 112                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 113                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 114                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 115                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
 116                                 # Make sure you're in a place you can leave when you call us!
 117                                 header( "HTTP/1.0 304 Not Modified" );
 118                                 $this->mLastModified = $lastmod;
 119                                 $this->sendCacheControl();
 120                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 121                                 $this->disable();
 122                                 return true;
 123                         } else {
 124                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 125                                 $this->mLastModified = $lastmod;
 126                         }
 127                 } else {
 128                         wfDebug( "We're confused.\n", false );
 129                         $this->mLastModified = $lastmod;
 130                 }
 131         }
 132
 133         function getPageTitleActionText () {
 134                 global $action;
 135                 switch($action) {
 136                         case 'edit':
 137                                 return wfMsg('edit');
 138                         case 'history':
 139                                 return wfMsg('history_short');
 140                         case 'protect':
 141                                 return wfMsg('protect');
 142                         case 'unprotect':
 143                                 return wfMsg('unprotect');
 144                         case 'delete':
 145                                 return wfMsg('delete');
 146                         case 'watch':
 147                                 return wfMsg('watch');
 148                         case 'unwatch':
 149                                 return wfMsg('unwatch');
 150                         case 'submit':
 151                                 return wfMsg('preview');
 152                         case 'info':
 153                                 return wfMsg('info_short');
 154                         default:
 155                                 return '';
 156                 }
 157         }
 158
 159         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 160         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 161         function setPageTitle( $name ) {
 162                 global $action, $wgContLang;
 163                 $name = $wgContLang->convert($name, true);
 164                 $this->mPagetitle = $name;
 165                 if(!empty($action)) {
 166                         $taction =  $this->getPageTitleActionText();
 167                         if( !empty( $taction ) ) {
 168                                 $name .= ' - '.$taction;
 169                         }
 170                 }
 171                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 172         }
 173         function getHTMLTitle() { return $this->mHTMLtitle; }
 174         function getPageTitle() { return $this->mPagetitle; }
 175         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 176         function getSubtitle() { return $this->mSubtitle; }
 177         function isArticle() { return $this->mIsarticle; }
 178         function setPrintable() { $this->mPrintable = true; }
 179         function isPrintable() { return $this->mPrintable; }
 180         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 181         function isSyndicated() { return $this->mShowFeedLinks; }
 182         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 183         function getOnloadHandler() { return $this->mOnloadHandler; }
 184         function disable() { $this->mDoNothing = true; }
 185
 186         function setArticleRelated( $v ) {
 187                 $this->mIsArticleRelated = $v;
 188                 if ( !$v ) {
 189                         $this->mIsarticle = false;
 190                 }
 191         }
 192         function setArticleFlag( $v ) {
 193                 $this->mIsarticle = $v;
 194                 if ( $v ) {
 195                         $this->mIsArticleRelated = $v;
 196                 }
 197         }
 198
 199         function isArticleRelated() { return $this->mIsArticleRelated; }
 200
 201         function getLanguageLinks() { return $this->mLanguageLinks; }
 202         function addLanguageLinks($newLinkArray) {
 203                 $this->mLanguageLinks += $newLinkArray;
 204         }
 205         function setLanguageLinks($newLinkArray) {
 206                 $this->mLanguageLinks = $newLinkArray;
 207         }
 208
 209         function getCategoryLinks() {
 210                 return $this->mCategoryLinks;
 211         }
 212         function addCategoryLinks($newLinkArray) {
 213                 $this->mCategoryLinks += $newLinkArray;
 214         }
 215         function setCategoryLinks($newLinkArray) {
 216                 $this->mCategoryLinks += $newLinkArray;
 217         }
 218
 219         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 220         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 221
 222         function addHTML( $text ) { $this->mBodytext .= $text; }
 223         function clearHTML() { $this->mBodytext = ''; }
 224         function debug( $text ) { $this->mDebugtext .= $text; }
 225
 226         function setParserOptions( $options ) {
 227                 return wfSetVar( $this->mParserOptions, $options );
 228         }
 229
 230         /**
 231          * Convert wikitext to HTML and add it to the buffer
 232          */
 233         function addWikiText( $text, $linestart = true ) {
 234                 global $wgParser, $wgTitle, $wgUseTidy;
 235
 236                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 237                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 238                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 239                 $this->addHTML( $parserOutput->getText() );
 240         }
 241
 242         /**
 243          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 244          * Saves the text into the parser cache if possible
 245          */
 246         function addPrimaryWikiText( $text, $cacheArticle ) {
 247                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 248
 249                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 250
 251                 $text = $parserOutput->getText();
 252
 253                 if ( $cacheArticle ) {
 254                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 255                 }
 256
 257                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 258                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 259                 $this->addHTML( $text );
 260         }
 261
 262         /**
 263          * Add the output of a QuickTemplate to the output buffer
 264          * @param QuickTemplate $template
 265          */
 266         function addTemplate( &$template ) {
 267                 ob_start();
 268                 $template->execute();
 269                 $this->addHtml( ob_get_contents() );
 270                 ob_end_clean();
 271         }
 272
 273         /**
 274          * Parse wikitext and return the HTML. This is for special pages that add the text later
 275          */
 276         function parse( $text, $linestart = true ) {
 277                 global $wgParser, $wgTitle;
 278                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 279                 return $parserOutput->getText();
 280         }
 281
 282         /**
 283          * @param $article
 284          * @param $user
 285          */
 286         function tryParserCache( $article, $user ) {
 287                 global $wgParserCache;
 288                 $parserOutput = $wgParserCache->get( $article, $user );
 289                 if ( $parserOutput !== false ) {
 290                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 291                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 292                         $this->addHTML( $parserOutput->getText() );
 293                         return true;
 294                 } else {
 295                         return false;
 296                 }
 297         }
 298
 299         /**
 300          * Set the maximum cache time on the Squid in seconds
 301          * @param $maxage
 302          */
 303         function setSquidMaxage( $maxage ) {
 304                 $this->mSquidMaxage = $maxage;
 305         }
 306
 307         /**
 308          * Use enableClientCache(false) to force it to send nocache headers
 309          * @param $state
 310          */
 311         function enableClientCache( $state ) {
 312                 return wfSetVar( $this->mEnableClientCache, $state );
 313         }
 314
 315         function sendCacheControl() {
 316                 global $wgUseSquid, $wgUseESI;
 317                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 318                 header( 'Vary: Accept-Encoding, Cookie' );
 319                 if( $this->mEnableClientCache ) {
 320                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 321                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 322                         {
 323                                 if ( $wgUseESI ) {
 324                                         # We'll purge the proxy cache explicitly, but require end user agents
 325                                         # to revalidate against the proxy on each visit.
 326                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 327                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 328                                         # start with a shorter timeout for initial testing
 329                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 330                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 331                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 332                                 } else {
 333                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 334                                         # to revalidate against the proxy on each visit.
 335                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 336                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 337                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 338                                         # start with a shorter timeout for initial testing
 339                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 340                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 341                                 }
 342                         } else {
 343                                 # We do want clients to cache if they can, but they *must* check for updates
 344                                 # on revisiting the page.
 345                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 346                                 header( "Expires: -1" );
 347                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 348                         }
 349                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 350                 } else {
 351                         wfDebug( "** no caching **\n", false );
 352
 353                         # In general, the absence of a last modified header should be enough to prevent
 354                         # the client from using its cache. We send a few other things just to make sure.
 355                         header( 'Expires: -1' );
 356                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 357                         header( 'Pragma: no-cache' );
 358                 }
 359         }
 360
 361         /**
 362          * Finally, all the text has been munged and accumulated into
 363          * the object, let's actually output it:
 364          */
 365         function output() {
 366                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 367                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 368                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 369
 370                 if( $this->mDoNothing ){
 371                         return;
 372                 }
 373                 $fname = 'OutputPage::output';
 374                 wfProfileIn( $fname );
 375                 $sk = $wgUser->getSkin();
 376
 377                 if ( '' != $this->mRedirect ) {
 378                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 379                                 # Standards require redirect URLs to be absolute
 380                                 global $wgServer;
 381                                 $this->mRedirect = $wgServer . $this->mRedirect;
 382                         }
 383                         if( $this->mRedirectCode == '301') {
 384                                 if( !$wgDebugRedirects ) {
 385                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 386                                 }
 387                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 388                         }
 389
 390                         $this->sendCacheControl();
 391
 392                         if( $wgDebugRedirects ) {
 393                                 $url = htmlspecialchars( $this->mRedirect );
 394                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 395                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 396                                 print "</body>\n</html>\n";
 397                         } else {
 398                                 header( 'Location: '.$this->mRedirect );
 399                         }
 400                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 401                         return;
 402                 }
 403
 404
 405                 # Buffer output; final headers may depend on later processing
 406                 ob_start();
 407
 408                 $this->transformBuffer();
 409
 410                 # Disable temporary placeholders, so that the skin produces HTML
 411                 $sk->postParseLinkColour( false );
 412
 413                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 414                 header( 'Content-language: '.$wgContLanguageCode );
 415
 416                 $exp = time() + $wgCookieExpiration;
 417                 foreach( $this->mCookies as $name => $val ) {
 418                         setcookie( $name, $val, $exp, '/' );
 419                 }
 420
 421                 wfProfileIn( 'Output-skin' );
 422                 $sk->outputPage( $this );
 423                 wfProfileOut( 'Output-skin' );
 424
 425                 $this->sendCacheControl();
 426                 ob_end_flush();
 427         }
 428
 429         function out( $ins ) {
 430                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 431                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 432                         $outs = $ins;
 433                 } else {
 434                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 435                         if ( false === $outs ) { $outs = $ins; }
 436                 }
 437                 print $outs;
 438         }
 439
 440         function setEncodings() {
 441                 global $wgInputEncoding, $wgOutputEncoding;
 442                 global $wgUser, $wgContLang;
 443
 444                 $wgInputEncoding = strtolower( $wgInputEncoding );
 445
 446                 if( $wgUser->getOption( 'altencoding' ) ) {
 447                         $wgContLang->setAltEncoding();
 448                         return;
 449                 }
 450
 451                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 452                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 453                         return;
 454                 }
 455
 456                 /*
 457                 # This code is unused anyway!
 458                 # Commenting out. --bv 2003-11-15
 459
 460                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 461                 $best = 0.0;
 462                 $bestset = "*";
 463
 464                 foreach ( $a as $s ) {
 465                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 466                                 $set = $m[1];
 467                                 $q = (float)($m[2]);
 468                         } else {
 469                                 $set = $s;
 470                                 $q = 1.0;
 471                         }
 472                         if ( $q > $best ) {
 473                                 $bestset = $set;
 474                                 $best = $q;
 475                         }
 476                 }
 477                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 478                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 479                 $wgOutputEncoding = strtolower( $bestset );
 480
 481 # Disable for now
 482 #
 483                 */
 484                 $wgOutputEncoding = $wgInputEncoding;
 485         }
 486
 487         /**
 488          * Returns a HTML comment with the elapsed time since request.
 489          * This method has no side effects.
 490          */
 491         function reportTime() {
 492                 global $wgRequestTime;
 493
 494                 $now = wfTime();
 495                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 496                 $start = (float)$sec + (float)$usec;
 497                 $elapsed = $now - $start;
 498
 499                 # Use real server name if available, so we know which machine
 500                 # in a server farm generated the current page.
 501                 if ( function_exists( 'posix_uname' ) ) {
 502                         $uname = @posix_uname();
 503                 } else {
 504                         $uname = false;
 505                 }
 506                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 507                         $hostname = $uname['nodename'];
 508                 } else {
 509                         # This may be a virtual server.
 510                         $hostname = $_SERVER['SERVER_NAME'];
 511                 }
 512                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 513                   $hostname, $elapsed );
 514                 return $com;
 515         }
 516
 517         /**
 518          * Note: these arguments are keys into wfMsg(), not text!
 519          */
 520         function errorpage( $title, $msg ) {
 521                 global $wgTitle;
 522
 523                 $this->mDebugtext .= 'Original title: ' .
 524                   $wgTitle->getPrefixedText() . "\n";
 525                 $this->setPageTitle( wfMsg( $title ) );
 526                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 527                 $this->setRobotpolicy( 'noindex,nofollow' );
 528                 $this->setArticleRelated( false );
 529                 $this->enableClientCache( false );
 530                 $this->mRedirect = '';
 531
 532                 $this->mBodytext = '';
 533                 $this->addHTML( '<p>' . wfMsg( $msg ) . "</p>\n" );
 534                 $this->returnToMain( false );
 535
 536                 $this->output();
 537                 wfErrorExit();
 538         }
 539
 540         function sysopRequired() {
 541                 global $wgUser;
 542
 543                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 544                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 545                 $this->setRobotpolicy( 'noindex,nofollow' );
 546                 $this->setArticleRelated( false );
 547                 $this->mBodytext = '';
 548
 549                 $sk = $wgUser->getSkin();
 550                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 551                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 552                 $this->returnToMain();
 553         }
 554
 555         function developerRequired() {
 556                 global $wgUser;
 557
 558                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 559                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 560                 $this->setRobotpolicy( 'noindex,nofollow' );
 561                 $this->setArticleRelated( false );
 562                 $this->mBodytext = '';
 563
 564                 $sk = $wgUser->getSkin();
 565                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 566                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 567                 $this->returnToMain();
 568         }
 569
 570         function loginToUse() {
 571                 global $wgUser, $wgTitle, $wgContLang;
 572
 573                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 574                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 575                 $this->setRobotpolicy( 'noindex,nofollow' );
 576                 $this->setArticleFlag( false );
 577                 $this->mBodytext = '';
 578                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 579
 580                 # We put a comment in the .html file so a Sysop can diagnose the page the
 581                 # user can't see.
 582                 $this->addHTML( "\n<!--" .
 583                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 584                                                 ':' .
 585                                                 $wgTitle->getDBkey() . '-->' );
 586                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 587         }
 588
 589         function databaseError( $fname, $sql, $error, $errno ) {
 590                 global $wgUser, $wgCommandLineMode;
 591
 592                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 593                 $this->setRobotpolicy( 'noindex,nofollow' );
 594                 $this->setArticleRelated( false );
 595                 $this->enableClientCache( false );
 596                 $this->mRedirect = '';
 597
 598                 if ( $wgCommandLineMode ) {
 599                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 600                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 601                 } else {
 602                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 603                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 604                 }
 605
 606                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 607                         print $msg."\n";
 608                         wfErrorExit();
 609                 }
 610                 $this->mBodytext = $msg;
 611                 $this->output();
 612                 wfErrorExit();
 613         }
 614
 615         function readOnlyPage( $source = null, $protected = false ) {
 616                 global $wgUser, $wgReadOnlyFile;
 617
 618                 $this->setRobotpolicy( 'noindex,nofollow' );
 619                 $this->setArticleRelated( false );
 620
 621                 if( $protected ) {
 622                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 623                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 624                 } else {
 625                         $this->setPageTitle( wfMsg( 'readonly' ) );
 626                         $reason = file_get_contents( $wgReadOnlyFile );
 627                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 628                 }
 629
 630                 if( is_string( $source ) ) {
 631                         if( strcmp( $source, '' ) == 0 ) {
 632                                 $source = wfMsg( 'noarticletext' );
 633                         }
 634                         $rows = $wgUser->getOption( 'rows' );
 635                         $cols = $wgUser->getOption( 'cols' );
 636                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 637                                 htmlspecialchars( $source ) . "\n</textarea>";
 638                         $this->addHTML( $text );
 639                 }
 640
 641                 $this->returnToMain( false );
 642         }
 643
 644         function fatalError( $message ) {
 645                 $this->setPageTitle( wfMsg( "internalerror" ) );
 646                 $this->setRobotpolicy( "noindex,nofollow" );
 647                 $this->setArticleRelated( false );
 648                 $this->enableClientCache( false );
 649                 $this->mRedirect = '';
 650
 651                 $this->mBodytext = $message;
 652                 $this->output();
 653                 wfErrorExit();
 654         }
 655
 656         function unexpectedValueError( $name, $val ) {
 657                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 658         }
 659
 660         function fileCopyError( $old, $new ) {
 661                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 662         }
 663
 664         function fileRenameError( $old, $new ) {
 665                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 666         }
 667
 668         function fileDeleteError( $name ) {
 669                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 670         }
 671
 672         function fileNotFoundError( $name ) {
 673                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 674         }
 675
 676         /**
 677          * return from error messages or notes
 678          * @param $auto automatically redirect the user after 10 seconds
 679          * @param $returnto page title to return to. Default is Main Page.
 680          */
 681         function returnToMain( $auto = true, $returnto = NULL ) {
 682                 global $wgUser, $wgOut, $wgRequest;
 683
 684                 if ( $returnto == NULL ) {
 685                         $returnto = $wgRequest->getText( 'returnto' );
 686                 }
 687                 $returnto = htmlspecialchars( $returnto );
 688
 689                 $sk = $wgUser->getSkin();
 690                 if ( '' == $returnto ) {
 691                         $returnto = wfMsgForContent( 'mainpage' );
 692                 }
 693                 $link = $sk->makeKnownLink( $returnto, '' );
 694
 695                 $r = wfMsg( 'returnto', $link );
 696                 if ( $auto ) {
 697                         $titleObj = Title::newFromText( $returnto );
 698                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 699                 }
 700                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 701         }
 702
 703         /**
 704          * This function takes the existing and broken links for the page
 705          * and uses the first 10 of them for META keywords
 706          */
 707         function addMetaTags () {
 708                 global $wgLinkCache , $wgOut ;
 709                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 710                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 711                 $a = array_merge ( $good , $bad ) ;
 712                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 713                 $a = implode ( ',' , $a ) ;
 714                 $strip = array(
 715                         "/<.*?" . ">/" => '',
 716                         "/[_]/" => ' '
 717                 );
 718                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 719
 720                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 721         }
 722
 723         /**
 724          * @private
 725          */
 726         function headElement() {
 727                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 728                 global $wgUser, $wgContLang, $wgRequest;
 729
 730                 $xml = ($wgMimeType == 'text/xml');
 731                 if( $xml ) {
 732                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 733                 } else {
 734                         $ret = '';
 735                 }
 736
 737                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 738
 739                 if ( "" == $this->mHTMLtitle ) {
 740                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 741                 }
 742                 if( $xml ) {
 743                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 744                 } else {
 745                         $xmlbits = '';
 746                 }
 747                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 748                 $ret .= "<html $xmlbits lang=\"$wgContLanguageCode\" $rtl>\n";
 749                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 750                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 751
 752                 $ret .= $this->getHeadLinks();
 753                 global $wgStylePath;
 754                 if( $this->isPrintable() ) {
 755                         $media = '';
 756                 } else {
 757                         $media = "media='print'";
 758                 }
 759                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 760                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 761
 762                 $sk = $wgUser->getSkin();
 763                 $ret .= $sk->getHeadScripts();
 764                 $ret .= $this->mScripts;
 765                 $ret .= $sk->getUserStyles();
 766
 767                 $ret .= "</head>\n";
 768                 return $ret;
 769         }
 770
 771         function getHeadLinks() {
 772                 global $wgRequest, $wgStylePath;
 773                 $ret = '';
 774                 foreach ( $this->mMetatags as $tag ) {
 775                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 776                                 $a = 'http-equiv';
 777                                 $tag[0] = substr( $tag[0], 5 );
 778                         } else {
 779                                 $a = 'name';
 780                         }
 781                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 782                 }
 783                 $p = $this->mRobotpolicy;
 784                 if ( '' == $p ) { $p = 'index,follow'; }
 785                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 786
 787                 if ( count( $this->mKeywords ) > 0 ) {
 788                         $strip = array(
 789                                 "/<.*?" . ">/" => '',
 790                                 "/[_]/" => ' '
 791                         );
 792                         $ret .= "<meta name=\"keywords\" content=\"" .
 793                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 794                 }
 795                 foreach ( $this->mLinktags as $tag ) {
 796                         $ret .= '<link';
 797                         foreach( $tag as $attr => $val ) {
 798                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 799                         }
 800                         $ret .= " />\n";
 801                 }
 802                 if( $this->isSyndicated() ) {
 803                         # FIXME: centralize the mime-type and name information in Feed.php
 804                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 805                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 806                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 807                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 808                 }
 809                 # FIXME: get these working
 810                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 811                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 812                 return $ret;
 813         }
 814
 815         /**
 816          * Run any necessary pre-output transformations on the buffer text
 817          */
 818         function transformBuffer( $options = 0 ) {
 819         }
 820
 821
 822 }
 823
 824 }
 825
 826 ?>