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          * Add the output of a QuickTemplate to the output buffer
 264          * @param QuickTemplate $template
 265          */
 266         function addTemplate( &$template ) {
 267                 ob_start();
 268                 $template->execute();
 269                 $this->addHtml( ob_get_contents() );
 270                 ob_end_clean();
 271         }
 272
 273         /**
 274          * @param $article
 275          * @param $user
 276          */
 277         function tryParserCache( $article, $user ) {
 278                 global $wgParserCache;
 279                 $parserOutput = $wgParserCache->get( $article, $user );
 280                 if ( $parserOutput !== false ) {
 281                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 282                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 283                         $this->addHTML( $parserOutput->getText() );
 284                         return true;
 285                 } else {
 286                         return false;
 287                 }
 288         }
 289
 290         /**
 291          * Set the maximum cache time on the Squid in seconds
 292          * @param $maxage
 293          */
 294         function setSquidMaxage( $maxage ) {
 295                 $this->mSquidMaxage = $maxage;
 296         }
 297
 298         /**
 299          * Use enableClientCache(false) to force it to send nocache headers
 300          * @param $state
 301          */
 302         function enableClientCache( $state ) {
 303                 return wfSetVar( $this->mEnableClientCache, $state );
 304         }
 305
 306         function sendCacheControl() {
 307                 global $wgUseSquid, $wgUseESI;
 308                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 309                 header( 'Vary: Accept-Encoding, Cookie' );
 310                 if( $this->mEnableClientCache ) {
 311                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 312                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 313                         {
 314                                 if ( $wgUseESI ) {
 315                                         # We'll purge the proxy cache explicitly, but require end user agents
 316                                         # to revalidate against the proxy on each visit.
 317                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 318                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 319                                         # start with a shorter timeout for initial testing
 320                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 321                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 322                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 323                                 } else {
 324                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 325                                         # to revalidate against the proxy on each visit.
 326                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 327                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 328                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 329                                         # start with a shorter timeout for initial testing
 330                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 331                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 332                                 }
 333                         } else {
 334                                 # We do want clients to cache if they can, but they *must* check for updates
 335                                 # on revisiting the page.
 336                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 337                                 header( "Expires: -1" );
 338                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 339                         }
 340                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 341                 } else {
 342                         wfDebug( "** no caching **\n", false );
 343
 344                         # In general, the absence of a last modified header should be enough to prevent
 345                         # the client from using its cache. We send a few other things just to make sure.
 346                         header( 'Expires: -1' );
 347                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 348                         header( 'Pragma: no-cache' );
 349                 }
 350         }
 351
 352         /**
 353          * Finally, all the text has been munged and accumulated into
 354          * the object, let's actually output it:
 355          */
 356         function output() {
 357                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 358                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 359                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 360
 361                 if( $this->mDoNothing ){
 362                         return;
 363                 }
 364                 $fname = 'OutputPage::output';
 365                 wfProfileIn( $fname );
 366                 $sk = $wgUser->getSkin();
 367
 368                 if ( '' != $this->mRedirect ) {
 369                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 370                                 # Standards require redirect URLs to be absolute
 371                                 global $wgServer;
 372                                 $this->mRedirect = $wgServer . $this->mRedirect;
 373                         }
 374                         if( $this->mRedirectCode == '301') {
 375                                 if( !$wgDebugRedirects ) {
 376                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 377                                 }
 378                                 $this->mLastModified = gmdate( 'D, j M Y H:i:s' ) . ' GMT';
 379                         }
 380
 381                         $this->sendCacheControl();
 382
 383                         if( $wgDebugRedirects ) {
 384                                 $url = htmlspecialchars( $this->mRedirect );
 385                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 386                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 387                                 print "</body>\n</html>\n";
 388                         } else {
 389                                 header( 'Location: '.$this->mRedirect );
 390                         }
 391                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 392                         return;
 393                 }
 394
 395
 396                 # Buffer output; final headers may depend on later processing
 397                 ob_start();
 398
 399                 $this->transformBuffer();
 400
 401                 # Disable temporary placeholders, so that the skin produces HTML
 402                 $sk->postParseLinkColour( false );
 403
 404                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 405                 header( 'Content-language: '.$wgContLanguageCode );
 406
 407                 $exp = time() + $wgCookieExpiration;
 408                 foreach( $this->mCookies as $name => $val ) {
 409                         setcookie( $name, $val, $exp, '/' );
 410                 }
 411
 412                 wfProfileIn( 'Output-skin' );
 413                 $sk->outputPage( $this );
 414                 wfProfileOut( 'Output-skin' );
 415
 416                 $this->sendCacheControl();
 417                 ob_end_flush();
 418         }
 419
 420         function out( $ins ) {
 421                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 422                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 423                         $outs = $ins;
 424                 } else {
 425                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 426                         if ( false === $outs ) { $outs = $ins; }
 427                 }
 428                 print $outs;
 429         }
 430
 431         function setEncodings() {
 432                 global $wgInputEncoding, $wgOutputEncoding;
 433                 global $wgUser, $wgContLang;
 434
 435                 $wgInputEncoding = strtolower( $wgInputEncoding );
 436
 437                 if( $wgUser->getOption( 'altencoding' ) ) {
 438                         $wgContLang->setAltEncoding();
 439                         return;
 440                 }
 441
 442                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 443                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 444                         return;
 445                 }
 446
 447                 /*
 448                 # This code is unused anyway!
 449                 # Commenting out. --bv 2003-11-15
 450
 451                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 452                 $best = 0.0;
 453                 $bestset = "*";
 454
 455                 foreach ( $a as $s ) {
 456                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 457                                 $set = $m[1];
 458                                 $q = (float)($m[2]);
 459                         } else {
 460                                 $set = $s;
 461                                 $q = 1.0;
 462                         }
 463                         if ( $q > $best ) {
 464                                 $bestset = $set;
 465                                 $best = $q;
 466                         }
 467                 }
 468                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 469                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 470                 $wgOutputEncoding = strtolower( $bestset );
 471
 472 # Disable for now
 473 #
 474                 */
 475                 $wgOutputEncoding = $wgInputEncoding;
 476         }
 477
 478         /**
 479          * Returns a HTML comment with the elapsed time since request.
 480          * This method has no side effects.
 481          */
 482         function reportTime() {
 483                 global $wgRequestTime;
 484
 485                 $now = wfTime();
 486                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 487                 $start = (float)$sec + (float)$usec;
 488                 $elapsed = $now - $start;
 489
 490                 # Use real server name if available, so we know which machine
 491                 # in a server farm generated the current page.
 492                 if ( function_exists( 'posix_uname' ) ) {
 493                         $uname = @posix_uname();
 494                 } else {
 495                         $uname = false;
 496                 }
 497                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 498                         $hostname = $uname['nodename'];
 499                 } else {
 500                         # This may be a virtual server.
 501                         $hostname = $_SERVER['SERVER_NAME'];
 502                 }
 503                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 504                   $hostname, $elapsed );
 505                 return $com;
 506         }
 507
 508         /**
 509          * Note: these arguments are keys into wfMsg(), not text!
 510          */
 511         function errorpage( $title, $msg ) {
 512                 global $wgTitle;
 513
 514                 $this->mDebugtext .= 'Original title: ' .
 515                   $wgTitle->getPrefixedText() . "\n";
 516                 $this->setPageTitle( wfMsg( $title ) );
 517                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 518                 $this->setRobotpolicy( 'noindex,nofollow' );
 519                 $this->setArticleRelated( false );
 520                 $this->suppressQuickbar();
 521
 522                 $this->enableClientCache( false );
 523                 $this->mRedirect = '';
 524
 525                 $this->mBodytext = '';
 526                 $this->addHTML( '<p>' . wfMsg( $msg ) . "</p>\n" );
 527                 $this->returnToMain( false );
 528
 529                 $this->output();
 530                 wfErrorExit();
 531         }
 532
 533         function sysopRequired() {
 534                 global $wgUser;
 535
 536                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 537                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 538                 $this->setRobotpolicy( 'noindex,nofollow' );
 539                 $this->setArticleRelated( false );
 540                 $this->mBodytext = '';
 541
 542                 $sk = $wgUser->getSkin();
 543                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 544                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 545                 $this->returnToMain();
 546         }
 547
 548         function developerRequired() {
 549                 global $wgUser;
 550
 551                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 552                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 553                 $this->setRobotpolicy( 'noindex,nofollow' );
 554                 $this->setArticleRelated( false );
 555                 $this->mBodytext = '';
 556
 557                 $sk = $wgUser->getSkin();
 558                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 559                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 560                 $this->returnToMain();
 561         }
 562
 563         function loginToUse() {
 564                 global $wgUser, $wgTitle, $wgContLang;
 565
 566                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 567                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 568                 $this->setRobotpolicy( 'noindex,nofollow' );
 569                 $this->setArticleFlag( false );
 570                 $this->mBodytext = '';
 571                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 572
 573                 # We put a comment in the .html file so a Sysop can diagnose the page the
 574                 # user can't see.
 575                 $this->addHTML( "\n<!--" .
 576                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 577                                                 ':' .
 578                                                 $wgTitle->getDBkey() . '-->' );
 579                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 580         }
 581
 582         function databaseError( $fname, $sql, $error, $errno ) {
 583                 global $wgUser, $wgCommandLineMode;
 584
 585                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 586                 $this->setRobotpolicy( 'noindex,nofollow' );
 587                 $this->setArticleRelated( false );
 588                 $this->enableClientCache( false );
 589                 $this->mRedirect = '';
 590
 591                 if ( $wgCommandLineMode ) {
 592                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 593                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 594                 } else {
 595                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 596                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 597                 }
 598
 599                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 600                         print $msg."\n";
 601                         wfErrorExit();
 602                 }
 603                 $this->mBodytext = $msg;
 604                 $this->output();
 605                 wfErrorExit();
 606         }
 607
 608         function readOnlyPage( $source = null, $protected = false ) {
 609                 global $wgUser, $wgReadOnlyFile;
 610
 611                 $this->setRobotpolicy( 'noindex,nofollow' );
 612                 $this->setArticleRelated( false );
 613
 614                 if( $protected ) {
 615                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 616                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 617                 } else {
 618                         $this->setPageTitle( wfMsg( 'readonly' ) );
 619                         $reason = file_get_contents( $wgReadOnlyFile );
 620                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 621                 }
 622
 623                 if( is_string( $source ) ) {
 624                         if( strcmp( $source, '' ) == 0 ) {
 625                                 $source = wfMsg( 'noarticletext' );
 626                         }
 627                         $rows = $wgUser->getOption( 'rows' );
 628                         $cols = $wgUser->getOption( 'cols' );
 629                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 630                                 htmlspecialchars( $source ) . "\n</textarea>";
 631                         $this->addHTML( $text );
 632                 }
 633
 634                 $this->returnToMain( false );
 635         }
 636
 637         function fatalError( $message ) {
 638                 $this->setPageTitle( wfMsg( "internalerror" ) );
 639                 $this->setRobotpolicy( "noindex,nofollow" );
 640                 $this->setArticleRelated( false );
 641                 $this->enableClientCache( false );
 642                 $this->mRedirect = '';
 643
 644                 $this->mBodytext = $message;
 645                 $this->output();
 646                 wfErrorExit();
 647         }
 648
 649         function unexpectedValueError( $name, $val ) {
 650                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 651         }
 652
 653         function fileCopyError( $old, $new ) {
 654                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 655         }
 656
 657         function fileRenameError( $old, $new ) {
 658                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 659         }
 660
 661         function fileDeleteError( $name ) {
 662                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 663         }
 664
 665         function fileNotFoundError( $name ) {
 666                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 667         }
 668
 669         /**
 670          * return from error messages or notes
 671          * @param $auto automatically redirect the user after 10 seconds
 672          * @param $returnto page title to return to. Default is Main Page.
 673          */
 674         function returnToMain( $auto = true, $returnto = NULL ) {
 675                 global $wgUser, $wgOut, $wgRequest;
 676
 677                 if ( $returnto == NULL ) {
 678                         $returnto = $wgRequest->getText( 'returnto' );
 679                 }
 680                 $returnto = htmlspecialchars( $returnto );
 681
 682                 $sk = $wgUser->getSkin();
 683                 if ( '' == $returnto ) {
 684                         $returnto = wfMsgForContent( 'mainpage' );
 685                 }
 686                 $link = $sk->makeKnownLink( $returnto, '' );
 687
 688                 $r = wfMsg( 'returnto', $link );
 689                 if ( $auto ) {
 690                         $titleObj = Title::newFromText( $returnto );
 691                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 692                 }
 693                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 694         }
 695
 696         /**
 697          * This function takes the existing and broken links for the page
 698          * and uses the first 10 of them for META keywords
 699          */
 700         function addMetaTags () {
 701                 global $wgLinkCache , $wgOut ;
 702                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 703                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 704                 $a = array_merge ( $good , $bad ) ;
 705                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 706                 $a = implode ( ',' , $a ) ;
 707                 $strip = array(
 708                         "/<.*?" . ">/" => '',
 709                         "/[_]/" => ' '
 710                 );
 711                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 712
 713                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 714         }
 715
 716         /**
 717          * @private
 718          */
 719         function headElement() {
 720                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 721                 global $wgUser, $wgContLang, $wgRequest;
 722
 723                 $xml = ($wgMimeType == 'text/xml');
 724                 if( $xml ) {
 725                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 726                 } else {
 727                         $ret = '';
 728                 }
 729
 730                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 731
 732                 if ( "" == $this->mHTMLtitle ) {
 733                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 734                 }
 735                 if( $xml ) {
 736                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 737                 } else {
 738                         $xmlbits = '';
 739                 }
 740                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 741                 $ret .= "<html $xmlbits lang=\"$wgContLanguageCode\" $rtl>\n";
 742                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 743                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 744
 745                 $ret .= $this->getHeadLinks();
 746                 global $wgStylePath;
 747                 if( $this->isPrintable() ) {
 748                         $media = '';
 749                 } else {
 750                         $media = "media='print'";
 751                 }
 752                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 753                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 754
 755                 $sk = $wgUser->getSkin();
 756                 $ret .= $sk->getHeadScripts();
 757                 $ret .= $this->mScripts;
 758                 $ret .= $sk->getUserStyles();
 759
 760                 $ret .= "</head>\n";
 761                 return $ret;
 762         }
 763
 764         function getHeadLinks() {
 765                 global $wgRequest, $wgStylePath;
 766                 $ret = '';
 767                 foreach ( $this->mMetatags as $tag ) {
 768                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 769                                 $a = 'http-equiv';
 770                                 $tag[0] = substr( $tag[0], 5 );
 771                         } else {
 772                                 $a = 'name';
 773                         }
 774                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 775                 }
 776                 $p = $this->mRobotpolicy;
 777                 if ( '' == $p ) { $p = 'index,follow'; }
 778                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 779
 780                 if ( count( $this->mKeywords ) > 0 ) {
 781                         $strip = array(
 782                                 "/<.*?" . ">/" => '',
 783                                 "/[_]/" => ' '
 784                         );
 785                         $ret .= "<meta name=\"keywords\" content=\"" .
 786                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 787                 }
 788                 foreach ( $this->mLinktags as $tag ) {
 789                         $ret .= '<link';
 790                         foreach( $tag as $attr => $val ) {
 791                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 792                         }
 793                         $ret .= " />\n";
 794                 }
 795                 if( $this->isSyndicated() ) {
 796                         # FIXME: centralize the mime-type and name information in Feed.php
 797                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 798                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 799                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 800                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 801                 }
 802                 # FIXME: get these working
 803                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 804                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 805                 return $ret;
 806         }
 807
 808         /**
 809          * Run any necessary pre-output transformations on the buffer text
 810          */
 811         function transformBuffer( $options = 0 ) {
 812         }
 813
 814 }
 815
 816 }
 817
 818 ?>