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          * Default assumes that the current page title will
 231          * be used.
 232          */
 233         function addWikiText( $text, $linestart = true ) {
 234                 global $wgTitle;
 235                 $this->addWikiTextTitle($text, $linestart, $wgTitle);
 236         }
 237
 238         function addWikiTextWithTitle($text, $linestart = true, &$title) {
 239                 $this->addWikiTextTitle($text, $linestart, $title);
 240         }
 241
 242         function addWikiTextTitle($text, $linestart, &$title) {
 243                 global $wgParser, $wgUseTidy;
 244                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions, $linestart );
 245                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 246                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 247                 $this->addHTML( $parserOutput->getText() );
 248
 249         }
 250
 251         /**
 252          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 253          * Saves the text into the parser cache if possible
 254          */
 255         function addPrimaryWikiText( $text, $cacheArticle ) {
 256                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 257
 258                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 259
 260                 $text = $parserOutput->getText();
 261
 262                 if ( $cacheArticle ) {
 263                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 264                 }
 265
 266                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 267                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 268                 $this->addHTML( $text );
 269         }
 270
 271         /**
 272          * Add the output of a QuickTemplate to the output buffer
 273          * @param QuickTemplate $template
 274          */
 275         function addTemplate( &$template ) {
 276                 ob_start();
 277                 $template->execute();
 278                 $this->addHtml( ob_get_contents() );
 279                 ob_end_clean();
 280         }
 281
 282         /**
 283          * Parse wikitext and return the HTML. This is for special pages that add the text later
 284          */
 285         function parse( $text, $linestart = true ) {
 286                 global $wgParser, $wgTitle;
 287                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 288                 return $parserOutput->getText();
 289         }
 290
 291         /**
 292          * @param $article
 293          * @param $user
 294          *
 295          * @return bool
 296          */
 297         function tryParserCache( $article, $user ) {
 298                 global $wgParserCache;
 299                 $parserOutput = $wgParserCache->get( $article, $user );
 300                 if ( $parserOutput !== false ) {
 301                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 302                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 303                         $this->addHTML( $parserOutput->getText() );
 304                         $t = $parserOutput->getTitleText();
 305                         if( !empty( $t ) ) {
 306                                 $this->setPageTitle( $t );
 307                         }
 308                         return true;
 309                 } else {
 310                         return false;
 311                 }
 312         }
 313
 314         /**
 315          * Set the maximum cache time on the Squid in seconds
 316          * @param $maxage
 317          */
 318         function setSquidMaxage( $maxage ) {
 319                 $this->mSquidMaxage = $maxage;
 320         }
 321
 322         /**
 323          * Use enableClientCache(false) to force it to send nocache headers
 324          * @param $state
 325          */
 326         function enableClientCache( $state ) {
 327                 return wfSetVar( $this->mEnableClientCache, $state );
 328         }
 329
 330         function sendCacheControl() {
 331                 global $wgUseSquid, $wgUseESI;
 332                 # don't serve compressed data to clients who can't handle it
 333                 # maintain different caches for logged-in users and non-logged in ones
 334                 header( 'Vary: Accept-Encoding, Cookie' );
 335                 if( $this->mEnableClientCache ) {
 336                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 337                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 338                         {
 339                                 if ( $wgUseESI ) {
 340                                         # We'll purge the proxy cache explicitly, but require end user agents
 341                                         # to revalidate against the proxy on each visit.
 342                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 343                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 344                                         # start with a shorter timeout for initial testing
 345                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 346                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 347                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 348                                 } else {
 349                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 350                                         # to revalidate against the proxy on each visit.
 351                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 352                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 353                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 354                                         # start with a shorter timeout for initial testing
 355                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 356                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 357                                 }
 358                         } else {
 359                                 # We do want clients to cache if they can, but they *must* check for updates
 360                                 # on revisiting the page.
 361                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 362                                 header( "Expires: -1" );
 363                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 364                         }
 365                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 366                 } else {
 367                         wfDebug( "** no caching **\n", false );
 368
 369                         # In general, the absence of a last modified header should be enough to prevent
 370                         # the client from using its cache. We send a few other things just to make sure.
 371                         header( 'Expires: -1' );
 372                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 373                         header( 'Pragma: no-cache' );
 374                 }
 375         }
 376
 377         /**
 378          * Finally, all the text has been munged and accumulated into
 379          * the object, let's actually output it:
 380          */
 381         function output() {
 382                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 383                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 384                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 385
 386                 if( $this->mDoNothing ){
 387                         return;
 388                 }
 389                 $fname = 'OutputPage::output';
 390                 wfProfileIn( $fname );
 391                 $sk = $wgUser->getSkin();
 392
 393                 if ( '' != $this->mRedirect ) {
 394                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 395                                 # Standards require redirect URLs to be absolute
 396                                 global $wgServer;
 397                                 $this->mRedirect = $wgServer . $this->mRedirect;
 398                         }
 399                         if( $this->mRedirectCode == '301') {
 400                                 if( !$wgDebugRedirects ) {
 401                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 402                                 }
 403                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 404                         }
 405
 406                         $this->sendCacheControl();
 407
 408                         if( $wgDebugRedirects ) {
 409                                 $url = htmlspecialchars( $this->mRedirect );
 410                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 411                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 412                                 print "</body>\n</html>\n";
 413                         } else {
 414                                 header( 'Location: '.$this->mRedirect );
 415                         }
 416                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 417                         return;
 418                 }
 419
 420
 421                 # Buffer output; final headers may depend on later processing
 422                 ob_start();
 423
 424                 $this->transformBuffer();
 425
 426                 # Disable temporary placeholders, so that the skin produces HTML
 427                 $sk->postParseLinkColour( false );
 428
 429                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 430                 header( 'Content-language: '.$wgContLanguageCode );
 431
 432                 $exp = time() + $wgCookieExpiration;
 433                 foreach( $this->mCookies as $name => $val ) {
 434                         setcookie( $name, $val, $exp, '/' );
 435                 }
 436
 437                 wfProfileIn( 'Output-skin' );
 438                 $sk->outputPage( $this );
 439                 wfProfileOut( 'Output-skin' );
 440
 441                 $this->sendCacheControl();
 442                 ob_end_flush();
 443         }
 444
 445         function out( $ins ) {
 446                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 447                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 448                         $outs = $ins;
 449                 } else {
 450                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 451                         if ( false === $outs ) { $outs = $ins; }
 452                 }
 453                 print $outs;
 454         }
 455
 456         function setEncodings() {
 457                 global $wgInputEncoding, $wgOutputEncoding;
 458                 global $wgUser, $wgContLang;
 459
 460                 $wgInputEncoding = strtolower( $wgInputEncoding );
 461
 462                 if( $wgUser->getOption( 'altencoding' ) ) {
 463                         $wgContLang->setAltEncoding();
 464                         return;
 465                 }
 466
 467                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 468                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 469                         return;
 470                 }
 471
 472                 /*
 473                 # This code is unused anyway!
 474                 # Commenting out. --bv 2003-11-15
 475
 476                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 477                 $best = 0.0;
 478                 $bestset = "*";
 479
 480                 foreach ( $a as $s ) {
 481                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 482                                 $set = $m[1];
 483                                 $q = (float)($m[2]);
 484                         } else {
 485                                 $set = $s;
 486                                 $q = 1.0;
 487                         }
 488                         if ( $q > $best ) {
 489                                 $bestset = $set;
 490                                 $best = $q;
 491                         }
 492                 }
 493                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 494                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 495                 $wgOutputEncoding = strtolower( $bestset );
 496
 497 # Disable for now
 498 #
 499                 */
 500                 $wgOutputEncoding = $wgInputEncoding;
 501         }
 502
 503         /**
 504          * Returns a HTML comment with the elapsed time since request.
 505          * This method has no side effects.
 506          * @return string
 507          */
 508         function reportTime() {
 509                 global $wgRequestTime;
 510
 511                 $now = wfTime();
 512                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 513                 $start = (float)$sec + (float)$usec;
 514                 $elapsed = $now - $start;
 515
 516                 # Use real server name if available, so we know which machine
 517                 # in a server farm generated the current page.
 518                 if ( function_exists( 'posix_uname' ) ) {
 519                         $uname = @posix_uname();
 520                 } else {
 521                         $uname = false;
 522                 }
 523                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 524                         $hostname = $uname['nodename'];
 525                 } else {
 526                         # This may be a virtual server.
 527                         $hostname = $_SERVER['SERVER_NAME'];
 528                 }
 529                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 530                   $hostname, $elapsed );
 531                 return $com;
 532         }
 533
 534         /**
 535          * Note: these arguments are keys into wfMsg(), not text!
 536          */
 537         function errorpage( $title, $msg ) {
 538                 global $wgTitle;
 539
 540                 $this->mDebugtext .= 'Original title: ' .
 541                   $wgTitle->getPrefixedText() . "\n";
 542                 $this->setPageTitle( wfMsg( $title ) );
 543                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 544                 $this->setRobotpolicy( 'noindex,nofollow' );
 545                 $this->setArticleRelated( false );
 546                 $this->enableClientCache( false );
 547                 $this->mRedirect = '';
 548
 549                 $this->mBodytext = '';
 550                 $this->addWikiText( wfMsg( $msg ) );
 551                 $this->returnToMain( false );
 552
 553                 $this->output();
 554                 wfErrorExit();
 555         }
 556
 557         function sysopRequired() {
 558                 global $wgUser;
 559
 560                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 561                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 562                 $this->setRobotpolicy( 'noindex,nofollow' );
 563                 $this->setArticleRelated( false );
 564                 $this->mBodytext = '';
 565
 566                 $sk = $wgUser->getSkin();
 567                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 568                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 569                 $this->returnToMain();
 570         }
 571
 572         function developerRequired() {
 573                 global $wgUser;
 574
 575                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 576                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 577                 $this->setRobotpolicy( 'noindex,nofollow' );
 578                 $this->setArticleRelated( false );
 579                 $this->mBodytext = '';
 580
 581                 $sk = $wgUser->getSkin();
 582                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 583                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 584                 $this->returnToMain();
 585         }
 586
 587         function loginToUse() {
 588                 global $wgUser, $wgTitle, $wgContLang;
 589
 590                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 591                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 592                 $this->setRobotpolicy( 'noindex,nofollow' );
 593                 $this->setArticleFlag( false );
 594                 $this->mBodytext = '';
 595                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 596
 597                 # We put a comment in the .html file so a Sysop can diagnose the page the
 598                 # user can't see.
 599                 $this->addHTML( "\n<!--" .
 600                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 601                                                 ':' .
 602                                                 $wgTitle->getDBkey() . '-->' );
 603                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 604         }
 605
 606         function databaseError( $fname, $sql, $error, $errno ) {
 607                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 608
 609                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 610                 $this->setRobotpolicy( 'noindex,nofollow' );
 611                 $this->setArticleRelated( false );
 612                 $this->enableClientCache( false );
 613                 $this->mRedirect = '';
 614
 615                 if( !$wgShowSQLErrors ) {
 616                         $sql = wfMsg( 'sqlhidden' );
 617                 }
 618
 619                 if ( $wgCommandLineMode ) {
 620                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 621                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 622                 } else {
 623                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 624                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 625                 }
 626
 627                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 628                         print $msg."\n";
 629                         wfErrorExit();
 630                 }
 631                 $this->mBodytext = $msg;
 632                 $this->output();
 633                 wfErrorExit();
 634         }
 635
 636         function readOnlyPage( $source = null, $protected = false ) {
 637                 global $wgUser, $wgReadOnlyFile;
 638
 639                 $this->setRobotpolicy( 'noindex,nofollow' );
 640                 $this->setArticleRelated( false );
 641
 642                 if( $protected ) {
 643                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 644                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 645                 } else {
 646                         $this->setPageTitle( wfMsg( 'readonly' ) );
 647                         $reason = file_get_contents( $wgReadOnlyFile );
 648                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 649                 }
 650
 651                 if( is_string( $source ) ) {
 652                         if( strcmp( $source, '' ) == 0 ) {
 653                                 $source = wfMsg( 'noarticletext' );
 654                         }
 655                         $rows = $wgUser->getOption( 'rows' );
 656                         $cols = $wgUser->getOption( 'cols' );
 657                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 658                                 htmlspecialchars( $source ) . "\n</textarea>";
 659                         $this->addHTML( $text );
 660                 }
 661
 662                 $this->returnToMain( false );
 663         }
 664
 665         function fatalError( $message ) {
 666                 $this->setPageTitle( wfMsg( "internalerror" ) );
 667                 $this->setRobotpolicy( "noindex,nofollow" );
 668                 $this->setArticleRelated( false );
 669                 $this->enableClientCache( false );
 670                 $this->mRedirect = '';
 671
 672                 $this->mBodytext = $message;
 673                 $this->output();
 674                 wfErrorExit();
 675         }
 676
 677         function unexpectedValueError( $name, $val ) {
 678                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 679         }
 680
 681         function fileCopyError( $old, $new ) {
 682                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 683         }
 684
 685         function fileRenameError( $old, $new ) {
 686                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 687         }
 688
 689         function fileDeleteError( $name ) {
 690                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 691         }
 692
 693         function fileNotFoundError( $name ) {
 694                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 695         }
 696
 697         /**
 698          * return from error messages or notes
 699          * @param $auto automatically redirect the user after 10 seconds
 700          * @param $returnto page title to return to. Default is Main Page.
 701          */
 702         function returnToMain( $auto = true, $returnto = NULL ) {
 703                 global $wgUser, $wgOut, $wgRequest;
 704
 705                 if ( $returnto == NULL ) {
 706                         $returnto = $wgRequest->getText( 'returnto' );
 707                 }
 708                 $returnto = htmlspecialchars( $returnto );
 709
 710                 $sk = $wgUser->getSkin();
 711                 if ( '' == $returnto ) {
 712                         $returnto = wfMsgForContent( 'mainpage' );
 713                 }
 714                 $link = $sk->makeKnownLink( $returnto, '' );
 715
 716                 $r = wfMsg( 'returnto', $link );
 717                 if ( $auto ) {
 718                         $titleObj = Title::newFromText( $returnto );
 719                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 720                 }
 721                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 722         }
 723
 724         /**
 725          * This function takes the existing and broken links for the page
 726          * and uses the first 10 of them for META keywords
 727          */
 728         function addMetaTags () {
 729                 global $wgLinkCache , $wgOut ;
 730                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 731                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 732                 $a = array_merge ( $good , $bad ) ;
 733                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 734                 $a = implode ( ',' , $a ) ;
 735                 $strip = array(
 736                         "/<.*?>/" => '',
 737                         "/_/" => ' '
 738                 );
 739                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 740
 741                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 742         }
 743
 744         /**
 745          * @private
 746          * @return string
 747          */
 748         function headElement() {
 749                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 750                 global $wgUser, $wgContLang, $wgRequest;
 751
 752                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 753                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 754                 } else {
 755                         $ret = '';
 756                 }
 757
 758                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 759
 760                 if ( "" == $this->mHTMLtitle ) {
 761                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 762                 }
 763
 764                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 765                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 766                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 767                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 768
 769                 $ret .= $this->getHeadLinks();
 770                 global $wgStylePath;
 771                 if( $this->isPrintable() ) {
 772                         $media = '';
 773                 } else {
 774                         $media = "media='print'";
 775                 }
 776                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 777                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 778
 779                 $sk = $wgUser->getSkin();
 780                 $ret .= $sk->getHeadScripts();
 781                 $ret .= $this->mScripts;
 782                 $ret .= $sk->getUserStyles();
 783
 784                 $ret .= "</head>\n";
 785                 return $ret;
 786         }
 787
 788         function getHeadLinks() {
 789                 global $wgRequest, $wgStylePath;
 790                 $ret = '';
 791                 foreach ( $this->mMetatags as $tag ) {
 792                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 793                                 $a = 'http-equiv';
 794                                 $tag[0] = substr( $tag[0], 5 );
 795                         } else {
 796                                 $a = 'name';
 797                         }
 798                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 799                 }
 800                 $p = $this->mRobotpolicy;
 801                 if ( '' == $p ) { $p = 'index,follow'; }
 802                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 803
 804                 if ( count( $this->mKeywords ) > 0 ) {
 805                         $strip = array(
 806                                 "/<.*?>/" => '',
 807                                 "/_/" => ' '
 808                         );
 809                         $ret .= "<meta name=\"keywords\" content=\"" .
 810                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 811                 }
 812                 foreach ( $this->mLinktags as $tag ) {
 813                         $ret .= '<link';
 814                         foreach( $tag as $attr => $val ) {
 815                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 816                         }
 817                         $ret .= " />\n";
 818                 }
 819                 if( $this->isSyndicated() ) {
 820                         # FIXME: centralize the mime-type and name information in Feed.php
 821                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 822                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 823                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 824                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 825                 }
 826
 827                 return $ret;
 828         }
 829
 830         /**
 831          * Run any necessary pre-output transformations on the buffer text
 832          */
 833         function transformBuffer( $options = 0 ) {
 834         }
 835
 836 }
 837
 838 } // MediaWiki
 839
 840 ?>