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