includes/OutputPage.php

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