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.txt
  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, $wgUser;
  89                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  90                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  91                         return;
  92                 }
  93                 if( !$wgCachePages ) {
  94                         wfDebug( "CACHE DISABLED\n", false );
  95                         return;
  96                 }
  97                 if( $wgUser->getOption( 'nocache' ) ) {
  98                         wfDebug( "USER DISABLED CACHE\n", false );
  99                         return;
 100                 }
 101
 102                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 103                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 104
 105                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 106                         # IE sends sizes after the date like this:
 107                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 108                         # this breaks strtotime().
 109                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 110                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 111                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 112                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 113                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 114                                 # Make sure you're in a place you can leave when you call us!
 115                                 header( "HTTP/1.0 304 Not Modified" );
 116                                 $this->mLastModified = $lastmod;
 117                                 $this->sendCacheControl();
 118                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 119                                 $this->disable();
 120                                 return true;
 121                         } else {
 122                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 123                                 $this->mLastModified = $lastmod;
 124                         }
 125                 } else {
 126                         wfDebug( "client did not send If-Modified-Since header\n", false );
 127                         $this->mLastModified = $lastmod;
 128                 }
 129         }
 130
 131         function getPageTitleActionText () {
 132                 global $action;
 133                 switch($action) {
 134                         case 'edit':
 135                                 return wfMsg('edit');
 136                         case 'history':
 137                                 return wfMsg('history_short');
 138                         case 'protect':
 139                                 return wfMsg('protect');
 140                         case 'unprotect':
 141                                 return wfMsg('unprotect');
 142                         case 'delete':
 143                                 return wfMsg('delete');
 144                         case 'watch':
 145                                 return wfMsg('watch');
 146                         case 'unwatch':
 147                                 return wfMsg('unwatch');
 148                         case 'submit':
 149                                 return wfMsg('preview');
 150                         case 'info':
 151                                 return wfMsg('info_short');
 152                         default:
 153                                 return '';
 154                 }
 155         }
 156
 157         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 158         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 159         function setPageTitle( $name ) {
 160                 global $action, $wgContLang;
 161                 $name = $wgContLang->convert($name, true);
 162                 $this->mPagetitle = $name;
 163                 if(!empty($action)) {
 164                         $taction =  $this->getPageTitleActionText();
 165                         if( !empty( $taction ) ) {
 166                                 $name .= ' - '.$taction;
 167                         }
 168                 }
 169                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 170         }
 171         function getHTMLTitle() { return $this->mHTMLtitle; }
 172         function getPageTitle() { return $this->mPagetitle; }
 173         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 174         function getSubtitle() { return $this->mSubtitle; }
 175         function isArticle() { return $this->mIsarticle; }
 176         function setPrintable() { $this->mPrintable = true; }
 177         function isPrintable() { return $this->mPrintable; }
 178         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 179         function isSyndicated() { return $this->mShowFeedLinks; }
 180         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 181         function getOnloadHandler() { return $this->mOnloadHandler; }
 182         function disable() { $this->mDoNothing = true; }
 183
 184         function setArticleRelated( $v ) {
 185                 $this->mIsArticleRelated = $v;
 186                 if ( !$v ) {
 187                         $this->mIsarticle = false;
 188                 }
 189         }
 190         function setArticleFlag( $v ) {
 191                 $this->mIsarticle = $v;
 192                 if ( $v ) {
 193                         $this->mIsArticleRelated = $v;
 194                 }
 195         }
 196
 197         function isArticleRelated() { return $this->mIsArticleRelated; }
 198
 199         function getLanguageLinks() { return $this->mLanguageLinks; }
 200         function addLanguageLinks($newLinkArray) {
 201                 $this->mLanguageLinks += $newLinkArray;
 202         }
 203         function setLanguageLinks($newLinkArray) {
 204                 $this->mLanguageLinks = $newLinkArray;
 205         }
 206
 207         function getCategoryLinks() {
 208                 return $this->mCategoryLinks;
 209         }
 210         function addCategoryLinks($newLinkArray) {
 211                 $this->mCategoryLinks += $newLinkArray;
 212         }
 213         function setCategoryLinks($newLinkArray) {
 214                 $this->mCategoryLinks += $newLinkArray;
 215         }
 216
 217         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 218         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 219
 220         function addHTML( $text ) { $this->mBodytext .= $text; }
 221         function clearHTML() { $this->mBodytext = ''; }
 222         function debug( $text ) { $this->mDebugtext .= $text; }
 223
 224         function setParserOptions( $options ) {
 225                 return wfSetVar( $this->mParserOptions, $options );
 226         }
 227
 228         /**
 229          * Convert wikitext to HTML and add it to the buffer
 230          */
 231         function addWikiText( $text, $linestart = true ) {
 232                 global $wgParser, $wgTitle, $wgUseTidy;
 233
 234                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 235                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 236                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 237                 $this->addHTML( $parserOutput->getText() );
 238         }
 239
 240         /**
 241          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 242          * Saves the text into the parser cache if possible
 243          */
 244         function addPrimaryWikiText( $text, $cacheArticle ) {
 245                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 246
 247                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 248
 249                 $text = $parserOutput->getText();
 250
 251                 if ( $cacheArticle ) {
 252                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 253                 }
 254
 255                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 256                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 257                 $this->addHTML( $text );
 258         }
 259
 260         /**
 261          * Add the output of a QuickTemplate to the output buffer
 262          * @param QuickTemplate $template
 263          */
 264         function addTemplate( &$template ) {
 265                 ob_start();
 266                 $template->execute();
 267                 $this->addHtml( ob_get_contents() );
 268                 ob_end_clean();
 269         }
 270
 271         /**
 272          * Parse wikitext and return the HTML. This is for special pages that add the text later
 273          */
 274         function parse( $text, $linestart = true ) {
 275                 global $wgParser, $wgTitle;
 276                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 277                 return $parserOutput->getText();
 278         }
 279
 280         /**
 281          * @param $article
 282          * @param $user
 283          *
 284          * @return bool
 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                         $t = $parserOutput->getTitleText();
 294                         if( !empty( $t ) ) {
 295                                 $this->setPageTitle( $t );
 296                         }
 297                         return true;
 298                 } else {
 299                         return false;
 300                 }
 301         }
 302
 303         /**
 304          * Set the maximum cache time on the Squid in seconds
 305          * @param $maxage
 306          */
 307         function setSquidMaxage( $maxage ) {
 308                 $this->mSquidMaxage = $maxage;
 309         }
 310
 311         /**
 312          * Use enableClientCache(false) to force it to send nocache headers
 313          * @param $state
 314          */
 315         function enableClientCache( $state ) {
 316                 return wfSetVar( $this->mEnableClientCache, $state );
 317         }
 318
 319         function sendCacheControl() {
 320                 global $wgUseSquid, $wgUseESI;
 321                 # don't serve compressed data to clients who can't handle it
 322                 # maintain different caches for logged-in users and non-logged in ones
 323                 header( 'Vary: Accept-Encoding, Cookie' );
 324                 if( $this->mEnableClientCache ) {
 325                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 326                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 327                         {
 328                                 if ( $wgUseESI ) {
 329                                         # We'll purge the proxy cache explicitly, but require end user agents
 330                                         # to revalidate against the proxy on each visit.
 331                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 332                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 333                                         # start with a shorter timeout for initial testing
 334                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 335                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 336                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 337                                 } else {
 338                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 339                                         # to revalidate against the proxy on each visit.
 340                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 341                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 342                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 343                                         # start with a shorter timeout for initial testing
 344                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 345                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 346                                 }
 347                         } else {
 348                                 # We do want clients to cache if they can, but they *must* check for updates
 349                                 # on revisiting the page.
 350                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 351                                 header( "Expires: -1" );
 352                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 353                         }
 354                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 355                 } else {
 356                         wfDebug( "** no caching **\n", false );
 357
 358                         # In general, the absence of a last modified header should be enough to prevent
 359                         # the client from using its cache. We send a few other things just to make sure.
 360                         header( 'Expires: -1' );
 361                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 362                         header( 'Pragma: no-cache' );
 363                 }
 364         }
 365
 366         /**
 367          * Finally, all the text has been munged and accumulated into
 368          * the object, let's actually output it:
 369          */
 370         function output() {
 371                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 372                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 373                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 374
 375                 if( $this->mDoNothing ){
 376                         return;
 377                 }
 378                 $fname = 'OutputPage::output';
 379                 wfProfileIn( $fname );
 380                 $sk = $wgUser->getSkin();
 381
 382                 if ( '' != $this->mRedirect ) {
 383                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 384                                 # Standards require redirect URLs to be absolute
 385                                 global $wgServer;
 386                                 $this->mRedirect = $wgServer . $this->mRedirect;
 387                         }
 388                         if( $this->mRedirectCode == '301') {
 389                                 if( !$wgDebugRedirects ) {
 390                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 391                                 }
 392                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 393                         }
 394
 395                         $this->sendCacheControl();
 396
 397                         if( $wgDebugRedirects ) {
 398                                 $url = htmlspecialchars( $this->mRedirect );
 399                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 400                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 401                                 print "</body>\n</html>\n";
 402                         } else {
 403                                 header( 'Location: '.$this->mRedirect );
 404                         }
 405                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 406                         return;
 407                 }
 408
 409
 410                 # Buffer output; final headers may depend on later processing
 411                 ob_start();
 412
 413                 $this->transformBuffer();
 414
 415                 # Disable temporary placeholders, so that the skin produces HTML
 416                 $sk->postParseLinkColour( false );
 417
 418                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 419                 header( 'Content-language: '.$wgContLanguageCode );
 420
 421                 $exp = time() + $wgCookieExpiration;
 422                 foreach( $this->mCookies as $name => $val ) {
 423                         setcookie( $name, $val, $exp, '/' );
 424                 }
 425
 426                 wfProfileIn( 'Output-skin' );
 427                 $sk->outputPage( $this );
 428                 wfProfileOut( 'Output-skin' );
 429
 430                 $this->sendCacheControl();
 431                 ob_end_flush();
 432         }
 433
 434         function out( $ins ) {
 435                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 436                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 437                         $outs = $ins;
 438                 } else {
 439                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 440                         if ( false === $outs ) { $outs = $ins; }
 441                 }
 442                 print $outs;
 443         }
 444
 445         function setEncodings() {
 446                 global $wgInputEncoding, $wgOutputEncoding;
 447                 global $wgUser, $wgContLang;
 448
 449                 $wgInputEncoding = strtolower( $wgInputEncoding );
 450
 451                 if( $wgUser->getOption( 'altencoding' ) ) {
 452                         $wgContLang->setAltEncoding();
 453                         return;
 454                 }
 455
 456                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 457                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 458                         return;
 459                 }
 460
 461                 /*
 462                 # This code is unused anyway!
 463                 # Commenting out. --bv 2003-11-15
 464
 465                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 466                 $best = 0.0;
 467                 $bestset = "*";
 468
 469                 foreach ( $a as $s ) {
 470                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 471                                 $set = $m[1];
 472                                 $q = (float)($m[2]);
 473                         } else {
 474                                 $set = $s;
 475                                 $q = 1.0;
 476                         }
 477                         if ( $q > $best ) {
 478                                 $bestset = $set;
 479                                 $best = $q;
 480                         }
 481                 }
 482                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 483                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 484                 $wgOutputEncoding = strtolower( $bestset );
 485
 486 # Disable for now
 487 #
 488                 */
 489                 $wgOutputEncoding = $wgInputEncoding;
 490         }
 491
 492         /**
 493          * Returns a HTML comment with the elapsed time since request.
 494          * This method has no side effects.
 495          * @return string
 496          */
 497         function reportTime() {
 498                 global $wgRequestTime;
 499
 500                 $now = wfTime();
 501                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 502                 $start = (float)$sec + (float)$usec;
 503                 $elapsed = $now - $start;
 504
 505                 # Use real server name if available, so we know which machine
 506                 # in a server farm generated the current page.
 507                 if ( function_exists( 'posix_uname' ) ) {
 508                         $uname = @posix_uname();
 509                 } else {
 510                         $uname = false;
 511                 }
 512                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 513                         $hostname = $uname['nodename'];
 514                 } else {
 515                         # This may be a virtual server.
 516                         $hostname = $_SERVER['SERVER_NAME'];
 517                 }
 518                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 519                   $hostname, $elapsed );
 520                 return $com;
 521         }
 522
 523         /**
 524          * Note: these arguments are keys into wfMsg(), not text!
 525          */
 526         function errorpage( $title, $msg ) {
 527                 global $wgTitle;
 528
 529                 $this->mDebugtext .= 'Original title: ' .
 530                   $wgTitle->getPrefixedText() . "\n";
 531                 $this->setPageTitle( wfMsg( $title ) );
 532                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 533                 $this->setRobotpolicy( 'noindex,nofollow' );
 534                 $this->setArticleRelated( false );
 535                 $this->enableClientCache( false );
 536                 $this->mRedirect = '';
 537
 538                 $this->mBodytext = '';
 539                 $this->addWikiText( wfMsg( $msg ) );
 540                 $this->returnToMain( false );
 541
 542                 $this->output();
 543                 wfErrorExit();
 544         }
 545
 546         function sysopRequired() {
 547                 global $wgUser;
 548
 549                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 550                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 551                 $this->setRobotpolicy( 'noindex,nofollow' );
 552                 $this->setArticleRelated( false );
 553                 $this->mBodytext = '';
 554
 555                 $sk = $wgUser->getSkin();
 556                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 557                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 558                 $this->returnToMain();
 559         }
 560
 561         function developerRequired() {
 562                 global $wgUser;
 563
 564                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 565                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 566                 $this->setRobotpolicy( 'noindex,nofollow' );
 567                 $this->setArticleRelated( false );
 568                 $this->mBodytext = '';
 569
 570                 $sk = $wgUser->getSkin();
 571                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 572                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 573                 $this->returnToMain();
 574         }
 575
 576         function loginToUse() {
 577                 global $wgUser, $wgTitle, $wgContLang;
 578
 579                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 580                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 581                 $this->setRobotpolicy( 'noindex,nofollow' );
 582                 $this->setArticleFlag( false );
 583                 $this->mBodytext = '';
 584                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 585
 586                 # We put a comment in the .html file so a Sysop can diagnose the page the
 587                 # user can't see.
 588                 $this->addHTML( "\n<!--" .
 589                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 590                                                 ':' .
 591                                                 $wgTitle->getDBkey() . '-->' );
 592                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 593         }
 594
 595         function databaseError( $fname, $sql, $error, $errno ) {
 596                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 597
 598                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 599                 $this->setRobotpolicy( 'noindex,nofollow' );
 600                 $this->setArticleRelated( false );
 601                 $this->enableClientCache( false );
 602                 $this->mRedirect = '';
 603
 604                 if( !$wgShowSQLErrors ) {
 605                         $sql = wfMsg( 'sqlhidden' );
 606                 }
 607
 608                 if ( $wgCommandLineMode ) {
 609                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 610                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 611                 } else {
 612                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 613                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 614                 }
 615
 616                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 617                         print $msg."\n";
 618                         wfErrorExit();
 619                 }
 620                 $this->mBodytext = $msg;
 621                 $this->output();
 622                 wfErrorExit();
 623         }
 624
 625         function readOnlyPage( $source = null, $protected = false ) {
 626                 global $wgUser, $wgReadOnlyFile;
 627
 628                 $this->setRobotpolicy( 'noindex,nofollow' );
 629                 $this->setArticleRelated( false );
 630
 631                 if( $protected ) {
 632                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 633                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 634                 } else {
 635                         $this->setPageTitle( wfMsg( 'readonly' ) );
 636                         $reason = file_get_contents( $wgReadOnlyFile );
 637                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 638                 }
 639
 640                 if( is_string( $source ) ) {
 641                         if( strcmp( $source, '' ) == 0 ) {
 642                                 $source = wfMsg( 'noarticletext' );
 643                         }
 644                         $rows = $wgUser->getOption( 'rows' );
 645                         $cols = $wgUser->getOption( 'cols' );
 646                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 647                                 htmlspecialchars( $source ) . "\n</textarea>";
 648                         $this->addHTML( $text );
 649                 }
 650
 651                 $this->returnToMain( false );
 652         }
 653
 654         function fatalError( $message ) {
 655                 $this->setPageTitle( wfMsg( "internalerror" ) );
 656                 $this->setRobotpolicy( "noindex,nofollow" );
 657                 $this->setArticleRelated( false );
 658                 $this->enableClientCache( false );
 659                 $this->mRedirect = '';
 660
 661                 $this->mBodytext = $message;
 662                 $this->output();
 663                 wfErrorExit();
 664         }
 665
 666         function unexpectedValueError( $name, $val ) {
 667                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 668         }
 669
 670         function fileCopyError( $old, $new ) {
 671                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 672         }
 673
 674         function fileRenameError( $old, $new ) {
 675                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 676         }
 677
 678         function fileDeleteError( $name ) {
 679                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 680         }
 681
 682         function fileNotFoundError( $name ) {
 683                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 684         }
 685
 686         /**
 687          * return from error messages or notes
 688          * @param $auto automatically redirect the user after 10 seconds
 689          * @param $returnto page title to return to. Default is Main Page.
 690          */
 691         function returnToMain( $auto = true, $returnto = NULL ) {
 692                 global $wgUser, $wgOut, $wgRequest;
 693
 694                 if ( $returnto == NULL ) {
 695                         $returnto = $wgRequest->getText( 'returnto' );
 696                 }
 697                 $returnto = htmlspecialchars( $returnto );
 698
 699                 $sk = $wgUser->getSkin();
 700                 if ( '' == $returnto ) {
 701                         $returnto = wfMsgForContent( 'mainpage' );
 702                 }
 703                 $link = $sk->makeKnownLink( $returnto, '' );
 704
 705                 $r = wfMsg( 'returnto', $link );
 706                 if ( $auto ) {
 707                         $titleObj = Title::newFromText( $returnto );
 708                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 709                 }
 710                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 711         }
 712
 713         /**
 714          * This function takes the existing and broken links for the page
 715          * and uses the first 10 of them for META keywords
 716          */
 717         function addMetaTags () {
 718                 global $wgLinkCache , $wgOut ;
 719                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 720                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 721                 $a = array_merge ( $good , $bad ) ;
 722                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 723                 $a = implode ( ',' , $a ) ;
 724                 $strip = array(
 725                         "/<.*?" . ">/" => '',
 726                         "/[_]/" => ' '
 727                 );
 728                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 729
 730                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 731         }
 732
 733         /**
 734          * @private
 735          * @return string
 736          */
 737         function headElement() {
 738                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 739                 global $wgUser, $wgContLang, $wgRequest;
 740
 741                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 742                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 743                 } else {
 744                         $ret = '';
 745                 }
 746
 747                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 748
 749                 if ( "" == $this->mHTMLtitle ) {
 750                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 751                 }
 752
 753                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 754                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 755                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 756                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 757
 758                 $ret .= $this->getHeadLinks();
 759                 global $wgStylePath;
 760                 if( $this->isPrintable() ) {
 761                         $media = '';
 762                 } else {
 763                         $media = "media='print'";
 764                 }
 765                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 766                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 767
 768                 $sk = $wgUser->getSkin();
 769                 $ret .= $sk->getHeadScripts();
 770                 $ret .= $this->mScripts;
 771                 $ret .= $sk->getUserStyles();
 772
 773                 $ret .= "</head>\n";
 774                 return $ret;
 775         }
 776
 777         function getHeadLinks() {
 778                 global $wgRequest, $wgStylePath;
 779                 $ret = '';
 780                 foreach ( $this->mMetatags as $tag ) {
 781                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 782                                 $a = 'http-equiv';
 783                                 $tag[0] = substr( $tag[0], 5 );
 784                         } else {
 785                                 $a = 'name';
 786                         }
 787                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 788                 }
 789                 $p = $this->mRobotpolicy;
 790                 if ( '' == $p ) { $p = 'index,follow'; }
 791                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 792
 793                 if ( count( $this->mKeywords ) > 0 ) {
 794                         $strip = array(
 795                                 "/<.*?" . ">/" => '',
 796                                 "/[_]/" => ' '
 797                         );
 798                         $ret .= "<meta name=\"keywords\" content=\"" .
 799                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 800                 }
 801                 foreach ( $this->mLinktags as $tag ) {
 802                         $ret .= '<link';
 803                         foreach( $tag as $attr => $val ) {
 804                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 805                         }
 806                         $ret .= " />\n";
 807                 }
 808                 if( $this->isSyndicated() ) {
 809                         # FIXME: centralize the mime-type and name information in Feed.php
 810                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 811                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 812                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 813                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 814                 }
 815
 816                 return $ret;
 817         }
 818
 819         /**
 820          * Run any necessary pre-output transformations on the buffer text
 821          */
 822         function transformBuffer( $options = 0 ) {
 823         }
 824
 825 }
 826
 827 } // MediaWiki
 828
 829 ?>