includes/OutputPage.php

   1 <?php
   2
   3 # This is not a valid entry point, perform no further processing unless MEDIAWIKI is defined
   4 if( defined( "MEDIAWIKI" ) ) {
   5
   6 # See design.doc
   7
   8 if($wgUseTeX) require_once( "Math.php" );
   9
  10 define( 'RLH_FOR_UPDATE', 1 );
  11
  12 class OutputPage {
  13         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  14         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  15         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  16         var $mSubtitle, $mRedirect;
  17         var $mLastModified, $mCategoryLinks;
  18         var $mScripts, $mLinkColours;
  19
  20         var $mSuppressQuickbar;
  21         var $mOnloadHandler;
  22         var $mDoNothing;
  23         var $mContainsOldMagic, $mContainsNewMagic;
  24         var $mIsArticleRelated;
  25         var $mParserOptions;
  26         var $mShowFeedLinks = false;
  27         var $mEnableClientCache = true;
  28
  29         function OutputPage()
  30         {
  31                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  32                 $this->mKeywords = $this->mLinktags = array();
  33                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  34                 $this->mRedirect = $this->mLastModified =
  35                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  36                 $this->mOnloadHandler = "";
  37                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  38                 $this->mSuppressQuickbar = $this->mPrintable = false;
  39                 $this->mLanguageLinks = array();
  40                 $this->mCategoryLinks = array() ;
  41                 $this->mDoNothing = false;
  42                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  43                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  44                 $this->mSquidMaxage = 0;
  45                 $this->mScripts = "";
  46         }
  47
  48         function addHeader( $name, $val ) { array_push( $this->mHeaders, "$name: $val" ) ; }
  49         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  50         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  51
  52         # To add an http-equiv meta tag, precede the name with "http:"
  53         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  54         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  55         function addScript( $script ) { $this->mScripts .= $script; }
  56         function getScript() { return $this->mScripts; }
  57
  58         function addLink( $linkarr ) {
  59                 # $linkarr should be an associative array of attributes. We'll escape on output.
  60                 array_push( $this->mLinktags, $linkarr );
  61         }
  62
  63         function addMetadataLink( $linkarr ) {
  64                 # note: buggy CC software only reads first "meta" link
  65                 static $haveMeta = false;
  66                 $linkarr["rel"] = ($haveMeta) ? "alternate meta" : "meta";
  67                 $this->addLink( $linkarr );
  68                 $haveMeta = true;
  69         }
  70
  71         # checkLastModified tells the client to use the client-cached page if
  72         # possible. If sucessful, the OutputPage is disabled so that
  73         # any future call to OutputPage->output() have no effect. The method
  74         # returns true iff cache-ok headers was sent.
  75         function checkLastModified ( $timestamp )
  76         {
  77                 global $wgLang, $wgCachePages, $wgUser;
  78                 if( !$wgCachePages ) {
  79                         wfDebug( "CACHE DISABLED\n", false );
  80                         return;
  81                 }
  82                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  83                         # IE 5.0 has probs with our caching
  84                         wfDebug( "-- bad client, not caching\n", false );
  85                         return;
  86                 }
  87                 if( $wgUser->getOption( "nocache" ) ) {
  88                         wfDebug( "USER DISABLED CACHE\n", false );
  89                         return;
  90                 }
  91
  92                 $lastmod = gmdate( "D, j M Y H:i:s", wfTimestamp2Unix( max( $timestamp, $wgUser->mTouched ) ) ) . " GMT";
  93
  94                 if( !empty( $_SERVER["HTTP_IF_MODIFIED_SINCE"] ) ) {
  95                         # IE sends sizes after the date like this:
  96                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
  97                         # this breaks strtotime().
  98                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
  99                         $ismodsince = wfUnix2Timestamp( strtotime( $modsince ) );
 100                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 101                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 102
 103                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
 104                                 # Make sure you're in a place you can leave when you call us!
 105                                 header( "HTTP/1.0 304 Not Modified" );
 106                                 $this->mLastModified = $lastmod;
 107                                 $this->sendCacheControl();
 108                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 109                                 $this->disable();
 110                                 return true;
 111                         } else {
 112                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 113                                 $this->mLastModified = $lastmod;
 114                         }
 115                 } else {
 116                         wfDebug( "We're confused.\n", false );
 117                         $this->mLastModified = $lastmod;
 118                 }
 119         }
 120
 121         function getPageTitleActionText () {
 122                 global $action;
 123                 switch($action) {
 124                         case 'edit':
 125                                 return wfMsg('edit');
 126                         case 'history':
 127                                 return wfMsg('history_short');
 128                         case 'protect':
 129                                 return wfMsg('protect');
 130                         case 'unprotect':
 131                                 return wfMsg('unprotect');
 132                         case 'delete':
 133                                 return wfMsg('delete');
 134                         case 'watch':
 135                                 return wfMsg('watch');
 136                         case 'unwatch':
 137                                 return wfMsg('unwatch');
 138                         case 'submit':
 139                                 return wfMsg('preview');
 140                         case 'info':
 141                                 return wfMsg('info_short');
 142                         default:
 143                                 return '';
 144                 }
 145         }
 146         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 147         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 148         function setPageTitle( $name ) {
 149                 global $action;
 150                 $this->mPagetitle = $name;
 151                 if(!empty($action)) {
 152                         $taction =  $this->getPageTitleActionText();
 153                         if( !empty( $taction ) ) {
 154                                 $name .= " - $taction";
 155                         }
 156                 }
 157                 $this->setHTMLTitle( $name . " - " . wfMsg( "wikititlesuffix" ) );
 158         }
 159         function getHTMLTitle() { return $this->mHTMLtitle; }
 160         function getPageTitle() { return $this->mPagetitle; }
 161         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 162         function getSubtitle() { return $this->mSubtitle; }
 163         function isArticle() { return $this->mIsarticle; }
 164         function setPrintable() { $this->mPrintable = true; }
 165         function isPrintable() { return $this->mPrintable; }
 166         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 167         function isSyndicated() { return $this->mShowFeedLinks; }
 168         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 169         function getOnloadHandler() { return $this->mOnloadHandler; }
 170         function disable() { $this->mDoNothing = true; }
 171
 172         function setArticleRelated( $v )
 173         {
 174                 $this->mIsArticleRelated = $v;
 175                 if ( !$v ) {
 176                         $this->mIsarticle = false;
 177                 }
 178         }
 179         function setArticleFlag( $v ) {
 180                 $this->mIsarticle = $v;
 181                 if ( $v ) {
 182                         $this->mIsArticleRelated = $v;
 183                 }
 184         }
 185
 186         function isArticleRelated()
 187         {
 188                 return $this->mIsArticleRelated;
 189         }
 190
 191         function getLanguageLinks() {
 192                 return $this->mLanguageLinks;
 193         }
 194         function addLanguageLinks($newLinkArray) {
 195                 $this->mLanguageLinks += $newLinkArray;
 196         }
 197         function setLanguageLinks($newLinkArray) {
 198                 $this->mLanguageLinks = $newLinkArray;
 199         }
 200         function getCategoryLinks() {
 201                 return $this->mCategoryLinks;
 202         }
 203         function addCategoryLinks($newLinkArray) {
 204                 $this->mCategoryLinks += $newLinkArray;
 205         }
 206         function setCategoryLinks($newLinkArray) {
 207                 $this->mCategoryLinks += $newLinkArray;
 208         }
 209
 210         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 211         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 212
 213         function addHTML( $text ) { $this->mBodytext .= $text; }
 214         function debug( $text ) { $this->mDebugtext .= $text; }
 215
 216         function setParserOptions( $options )
 217         {
 218                 return wfSetVar( $this->mParserOptions, $options );
 219         }
 220
 221         # First pass--just handle <nowiki> sections, pass the rest off
 222         # to doWikiPass2() which does all the real work.
 223         #
 224         # $cacheArticle - assume this text is the main text for the given article
 225         #
 226         function addWikiText( $text, $linestart = true, $cacheArticle = NULL )
 227         {
 228                 global $wgParser, $wgParserCache, $wgUser, $wgTitle;
 229
 230                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 231                 if ( $cacheArticle ) {
 232                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 233                 }
 234
 235                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 236                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 237                 $this->addHTML( $parserOutput->getText() );
 238         }
 239
 240         function tryParserCache( $article, $user ) {
 241                 global $wgParserCache;
 242                 $parserOutput = $wgParserCache->get( $article, $user );
 243                 if ( $parserOutput !== false ) {
 244                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 245                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 246                         $this->addHTML( $parserOutput->getText() );
 247                         return true;
 248                 } else {
 249                         return false;
 250                 }
 251         }
 252
 253         # Set the maximum cache time on the Squid in seconds
 254         function setSquidMaxage( $maxage ) {
 255                 $this->mSquidMaxage = $maxage;
 256         }
 257
 258         # Use enableClientCache(false) to force it to send nocache headers
 259         function enableClientCache( $state ) {
 260                 return wfSetVar( $this->mEnableClientCache, $state );
 261         }
 262
 263         function sendCacheControl() {
 264                 global $wgUseSquid, $wgUseESI;
 265                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 266                 header( "Vary: Accept-Encoding, Cookie" );
 267                 if( $this->mEnableClientCache ) {
 268                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( "session.name") ] ) &&
 269                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 270                         {
 271                                 if ( $wgUseESI ) {
 272                                         # We'll purge the proxy cache explicitly, but require end user agents
 273                                         # to revalidate against the proxy on each visit.
 274                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 275                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 276                                         # start with a shorter timeout for initial testing
 277                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 278                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 279                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 280                                 } else {
 281                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 282                                         # to revalidate against the proxy on each visit.
 283                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 284                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 285                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 286                                         # start with a shorter timeout for initial testing
 287                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 288                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 289                                 }
 290                         } else {
 291                                 # We do want clients to cache if they can, but they *must* check for updates
 292                                 # on revisiting the page.
 293                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 294                                 header( "Expires: -1" );
 295                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 296                         }
 297                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 298                 } else {
 299                         wfDebug( "** no caching **\n", false );
 300
 301                         # In general, the absence of a last modified header should be enough to prevent
 302                         # the client from using its cache. We send a few other things just to make sure.
 303                         header( "Expires: -1" );
 304                         header( "Cache-Control: no-cache, no-store, max-age=0, must-revalidate" );
 305                         header( "Pragma: no-cache" );
 306                 }
 307         }
 308
 309         # Finally, all the text has been munged and accumulated into
 310         # the object, let's actually output it:
 311         #
 312         function output()
 313         {
 314                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 315                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 316                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 317                 if( $this->mDoNothing ){
 318                         return;
 319                 }
 320                 $fname = "OutputPage::output";
 321                 wfProfileIn( $fname );
 322
 323                 $sk = $wgUser->getSkin();
 324
 325                 if ( "" != $this->mRedirect ) {
 326                         if( substr( $this->mRedirect, 0, 4 ) != "http" ) {
 327                                 # Standards require redirect URLs to be absolute
 328                                 global $wgServer;
 329                                 $this->mRedirect = $wgServer . $this->mRedirect;
 330                         }
 331                         if( $this->mRedirectCode == '301') {
 332                                 if( !$wgDebugRedirects ) {
 333                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 334                                 }
 335                                 $this->mLastModified = gmdate( "D, j M Y H:i:s" ) . " GMT";
 336                         }
 337
 338                         $this->sendCacheControl();
 339
 340                         if( $wgDebugRedirects ) {
 341                                 $url = htmlspecialchars( $this->mRedirect );
 342                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 343                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 344                                 print "</body>\n</html>\n";
 345                         } else {
 346                                 header( "Location: {$this->mRedirect}" );
 347                         }
 348                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 349                         return;
 350                 }
 351
 352
 353                 $this->sendCacheControl();
 354                 # Perform link colouring
 355                 $this->replaceLinkHolders();
 356
 357                 # Disable temporary placeholders, so that the skin produces HTML
 358                 $sk->postParseLinkColour( false );
 359
 360                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 361                 header( "Content-language: {$wgLanguageCode}" );
 362
 363                 $exp = time() + $wgCookieExpiration;
 364                 foreach( $this->mCookies as $name => $val ) {
 365                         setcookie( $name, $val, $exp, "/" );
 366                 }
 367
 368                 $sk->outputPage( $this );
 369                 # flush();
 370         }
 371
 372         function out( $ins )
 373         {
 374                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 375                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 376                         $outs = $ins;
 377                 } else {
 378                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 379                         if ( false === $outs ) { $outs = $ins; }
 380                 }
 381                 print $outs;
 382         }
 383
 384         function setEncodings()
 385         {
 386                 global $wgInputEncoding, $wgOutputEncoding;
 387                 global $wgUser, $wgLang;
 388
 389                 $wgInputEncoding = strtolower( $wgInputEncoding );
 390
 391                 if( $wgUser->getOption( 'altencoding' ) ) {
 392                         $wgLang->setAltEncoding();
 393                         return;
 394                 }
 395
 396                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 397                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 398                         return;
 399                 }
 400
 401                 /*
 402                 # This code is unused anyway!
 403                 # Commenting out. --bv 2003-11-15
 404
 405                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 406                 $best = 0.0;
 407                 $bestset = "*";
 408
 409                 foreach ( $a as $s ) {
 410                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 411                                 $set = $m[1];
 412                                 $q = (float)($m[2]);
 413                         } else {
 414                                 $set = $s;
 415                                 $q = 1.0;
 416                         }
 417                         if ( $q > $best ) {
 418                                 $bestset = $set;
 419                                 $best = $q;
 420                         }
 421                 }
 422                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 423                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 424                 $wgOutputEncoding = strtolower( $bestset );
 425
 426 # Disable for now
 427 #
 428                 */
 429                 $wgOutputEncoding = $wgInputEncoding;
 430         }
 431
 432         # Returns a HTML comment with the elapsed time since request.
 433         # This method has no side effects.
 434         function reportTime()
 435         {
 436                 global $wgRequestTime;
 437
 438                 $now = wfTime();
 439                 list( $usec, $sec ) = explode( " ", $wgRequestTime );
 440                 $start = (float)$sec + (float)$usec;
 441                 $elapsed = $now - $start;
 442
 443                 # Use real server name if available, so we know which machine
 444                 # in a server farm generated the current page.
 445                 if ( function_exists( "posix_uname" ) ) {
 446                         $uname = @posix_uname();
 447                 } else {
 448                         $uname = false;
 449                 }
 450                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 451                         $hostname = $uname['nodename'];
 452                 } else {
 453                         # This may be a virtual server.
 454                         $hostname = $_SERVER['SERVER_NAME'];
 455                 }
 456                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 457                   $hostname, $elapsed );
 458                 return $com;
 459         }
 460
 461         # Note: these arguments are keys into wfMsg(), not text!
 462         #
 463         function errorpage( $title, $msg )
 464         {
 465                 global $wgTitle;
 466
 467                 $this->mDebugtext .= "Original title: " .
 468                   $wgTitle->getPrefixedText() . "\n";
 469                 $this->setPageTitle( wfMsg( $title ) );
 470                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 471                 $this->setRobotpolicy( "noindex,nofollow" );
 472                 $this->setArticleRelated( false );
 473                 $this->enableClientCache( false );
 474                 $this->mRedirect = "";
 475
 476                 $this->mBodytext = "";
 477                 $this->addHTML( "<p>" . wfMsg( $msg ) . "</p>\n" );
 478                 $this->returnToMain( false );
 479
 480                 $this->output();
 481                 wfErrorExit();
 482         }
 483
 484         function sysopRequired()
 485         {
 486                 global $wgUser;
 487
 488                 $this->setPageTitle( wfMsg( "sysoptitle" ) );
 489                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 490                 $this->setRobotpolicy( "noindex,nofollow" );
 491                 $this->setArticleRelated( false );
 492                 $this->mBodytext = "";
 493
 494                 $sk = $wgUser->getSkin();
 495                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 496                 $this->addHTML( wfMsg( "sysoptext", $ap ) );
 497                 $this->returnToMain();
 498         }
 499
 500         function developerRequired()
 501         {
 502                 global $wgUser;
 503
 504                 $this->setPageTitle( wfMsg( "developertitle" ) );
 505                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 506                 $this->setRobotpolicy( "noindex,nofollow" );
 507                 $this->setArticleRelated( false );
 508                 $this->mBodytext = "";
 509
 510                 $sk = $wgUser->getSkin();
 511                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 512                 $this->addHTML( wfMsg( "developertext", $ap ) );
 513                 $this->returnToMain();
 514         }
 515
 516         function loginToUse()
 517         {
 518                 global $wgUser, $wgTitle, $wgLang;
 519
 520                 $this->setPageTitle( wfMsg( "loginreqtitle" ) );
 521                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 522                 $this->setRobotpolicy( "noindex,nofollow" );
 523                 $this->setArticleFlag( false );
 524                 $this->mBodytext = "";
 525                 $this->addWikiText( wfMsg( "loginreqtext" ) );
 526
 527                 # We put a comment in the .html file so a Sysop can diagnose the page the
 528                 # user can't see.
 529                 $this->addHTML( "\n<!--" .
 530                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 531                                                 ":" .
 532                                                 $wgTitle->getDBkey() . "-->" );
 533                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 534         }
 535
 536         function databaseError( $fname, $sql, $error, $errno )
 537         {
 538                 global $wgUser, $wgCommandLineMode;
 539
 540                 $this->setPageTitle( wfMsgNoDB( "databaseerror" ) );
 541                 $this->setRobotpolicy( "noindex,nofollow" );
 542                 $this->setArticleRelated( false );
 543                 $this->enableClientCache( false );
 544                 $this->mRedirect = "";
 545
 546                 if ( $wgCommandLineMode ) {
 547                         $msg = wfMsgNoDB( "dberrortextcl", htmlspecialchars( $sql ),
 548                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 549                 } else {
 550                         $msg = wfMsgNoDB( "dberrortext", htmlspecialchars( $sql ),
 551                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 552                 }
 553
 554                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 555                         print "$msg\n";
 556                         wfErrorExit();
 557                 }
 558                 $this->mBodytext = $msg;
 559                 $this->output();
 560                 wfErrorExit();
 561         }
 562
 563         function readOnlyPage( $source = null, $protected = false )
 564         {
 565                 global $wgUser, $wgReadOnlyFile;
 566
 567                 $this->setRobotpolicy( "noindex,nofollow" );
 568                 $this->setArticleRelated( false );
 569
 570                 if( $protected ) {
 571                         $this->setPageTitle( wfMsg( "viewsource" ) );
 572                         $this->addWikiText( wfMsg( "protectedtext" ) );
 573                 } else {
 574                         $this->setPageTitle( wfMsg( "readonly" ) );
 575                         $reason = file_get_contents( $wgReadOnlyFile );
 576                         $this->addWikiText( wfMsg( "readonlytext", $reason ) );
 577                 }
 578
 579                 if( is_string( $source ) ) {
 580                         if( strcmp( $source, "" ) == 0 ) {
 581                                 $source = wfMsg( "noarticletext" );
 582                         }
 583                         $rows = $wgUser->getOption( "rows" );
 584                         $cols = $wgUser->getOption( "cols" );
 585                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 586                                 htmlspecialchars( $source ) . "\n</textarea>";
 587                         $this->addHTML( $text );
 588                 }
 589
 590                 $this->returnToMain( false );
 591         }
 592
 593         function fatalError( $message )
 594         {
 595                 $this->setPageTitle( wfMsg( "internalerror" ) );
 596                 $this->setRobotpolicy( "noindex,nofollow" );
 597                 $this->setArticleRelated( false );
 598                 $this->enableClientCache( false );
 599                 $this->mRedirect = "";
 600
 601                 $this->mBodytext = $message;
 602                 $this->output();
 603                 wfErrorExit();
 604         }
 605
 606         function unexpectedValueError( $name, $val )
 607         {
 608                 $this->fatalError( wfMsg( "unexpected", $name, $val ) );
 609         }
 610
 611         function fileCopyError( $old, $new )
 612         {
 613                 $this->fatalError( wfMsg( "filecopyerror", $old, $new ) );
 614         }
 615
 616         function fileRenameError( $old, $new )
 617         {
 618                 $this->fatalError( wfMsg( "filerenameerror", $old, $new ) );
 619         }
 620
 621         function fileDeleteError( $name )
 622         {
 623                 $this->fatalError( wfMsg( "filedeleteerror", $name ) );
 624         }
 625
 626         function fileNotFoundError( $name )
 627         {
 628                 $this->fatalError( wfMsg( "filenotfound", $name ) );
 629         }
 630
 631         // return from error messages or notes
 632         //   auto:      automatically redirect the user after 10 seconds
 633         //   returnto:  page title to return to. Default is Main Page.
 634         function returnToMain( $auto = true, $returnto = NULL )
 635         {
 636                 global $wgUser, $wgOut, $wgRequest;
 637
 638                 if ( $returnto == NULL ) {
 639                         $returnto = $wgRequest->getText( 'returnto' );
 640                 }
 641
 642                 $sk = $wgUser->getSkin();
 643                 if ( "" == $returnto ) {
 644                         $returnto = wfMsg( "mainpage" );
 645                 }
 646                 $link = $sk->makeKnownLink( $returnto, "" );
 647
 648                 $r = wfMsg( "returnto", $link );
 649                 if ( $auto ) {
 650                         $titleObj = Title::newFromText( $returnto );
 651                         $wgOut->addMeta( "http:Refresh", "10;url=" . $titleObj->escapeFullURL() );
 652                 }
 653                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 654         }
 655
 656         # This function takes the existing and broken links for the page
 657         # and uses the first 10 of them for META keywords
 658         function addMetaTags ()
 659         {
 660                 global $wgLinkCache , $wgOut ;
 661                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 662                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 663                 $a = array_merge ( $good , $bad ) ;
 664                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 665                 $a = implode ( "," , $a ) ;
 666                 $strip = array(
 667                         "/<.*?" . ">/" => '',
 668                         "/[_]/" => ' '
 669                 );
 670                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 671
 672                 $wgOut->addMeta ( "KEYWORDS" , $a ) ;
 673         }
 674
 675         /* private */ function headElement()
 676         {
 677                 global $wgDocType, $wgDTD, $wgLanguageCode, $wgOutputEncoding, $wgMimeType;
 678                 global $wgUser, $wgLang, $wgRequest;
 679
 680                 $xml = ($wgMimeType == 'text/xml');
 681                 if( $xml ) {
 682                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 683                 } else {
 684                         $ret = "";
 685                 }
 686
 687                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 688
 689                 if ( "" == $this->mHTMLtitle ) {
 690                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 691                 }
 692                 if( $xml ) {
 693                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 694                 } else {
 695                         $xmlbits = "";
 696                 }
 697                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : "";
 698                 $ret .= "<html $xmlbits lang=\"$wgLanguageCode\" $rtl>\n";
 699                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 700                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 701
 702                 $ret .= $this->getHeadLinks();
 703                 global $wgStylePath;
 704                 if( $this->isPrintable() ) {
 705                         $media = "";
 706                 } else {
 707                         $media = "media='print'";
 708                 }
 709                 $printsheet = htmlspecialchars( "$wgStylePath/wikiprintable.css" );
 710                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 711
 712                 $sk = $wgUser->getSkin();
 713                 $ret .= $sk->getHeadScripts();
 714                 $ret .= $this->mScripts;
 715                 $ret .= $sk->getUserStyles();
 716
 717                 $ret .= "</head>\n";
 718                 return $ret;
 719         }
 720
 721         function getHeadLinks() {
 722                 global $wgRequest, $wgStylePath;
 723                 $ret = "";
 724                 foreach ( $this->mMetatags as $tag ) {
 725                         if ( 0 == strcasecmp( "http:", substr( $tag[0], 0, 5 ) ) ) {
 726                                 $a = "http-equiv";
 727                                 $tag[0] = substr( $tag[0], 5 );
 728                         } else {
 729                                 $a = "name";
 730                         }
 731                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 732                 }
 733                 $p = $this->mRobotpolicy;
 734                 if ( "" == $p ) { $p = "index,follow"; }
 735                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 736
 737                 if ( count( $this->mKeywords ) > 0 ) {
 738                         $strip = array(
 739                                 "/<.*?" . ">/" => '',
 740                                 "/[_]/" => ' '
 741                         );
 742                         $ret .= "<meta name=\"keywords\" content=\"" .
 743                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 744                 }
 745                 foreach ( $this->mLinktags as $tag ) {
 746                         $ret .= "<link";
 747                         foreach( $tag as $attr => $val ) {
 748                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 749                         }
 750                         $ret .= " />\n";
 751                 }
 752                 if( $this->isSyndicated() ) {
 753                         # FIXME: centralize the mime-type and name information in Feed.php
 754                         $link = $wgRequest->escapeAppendQuery( "feed=rss" );
 755                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 756                         $link = $wgRequest->escapeAppendQuery( "feed=atom" );
 757                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 758                 }
 759                 # FIXME: get these working
 760                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 761                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 762                 return $ret;
 763         }
 764
 765         # Replace <!--LINK--> link placeholders with actual links, in the buffer
 766         # Placeholders created in Skin::makeLinkObj()
 767         # Returns an array of links found, indexed by PDBK:
 768         #   0 - broken
 769         #   1 - normal link
 770         #   2 - stub
 771         # $options is a bit field, RLH_FOR_UPDATE to select for update
 772         function replaceLinkHolders( $options = 0 )
 773         {
 774                 global $wgUser, $wgLinkCache, $wgUseOldExistenceCheck;
 775
 776                 if ( $wgUseOldExistenceCheck ) {
 777                         return array();
 778                 }
 779
 780                 $fname = 'OutputPage::replaceLinkHolders';
 781                 wfProfileIn( $fname );
 782
 783                 $titles = array();
 784                 $pdbks = array();
 785                 $colours = array();
 786
 787                 # Get placeholders from body
 788                 wfProfileIn( "$fname-match" );
 789                 preg_match_all( "/<!--LINK (.*?) (.*?) (.*?) (.*?)-->/", $this->mBodytext, $tmpLinks );
 790                 wfProfileOut( "$fname-match" );
 791
 792                 if ( !empty( $tmpLinks[0] ) ) {
 793                         wfProfileIn( "$fname-check" );
 794                         $dbr =& wfGetDB( DB_SLAVE );
 795                         $cur = $dbr->tableName( 'cur' );
 796                         $sk = $wgUser->getSkin();
 797                         $threshold = $wgUser->getOption('stubthreshold');
 798
 799                         $namespaces =& $tmpLinks[1];
 800                         $dbkeys =& $tmpLinks[2];
 801                         $queries =& $tmpLinks[3];
 802                         $texts =& $tmpLinks[4];
 803
 804                         # Sort by namespace
 805                         asort( $namespaces );
 806
 807                         # Generate query
 808                         $query = false;
 809                         foreach ( $namespaces as $key => $val ) {
 810                                 # Make title object
 811                                 $dbk = $dbkeys[$key];
 812                                 $title = $titles[$key] = Title::makeTitle( $val, $dbk );
 813
 814                                 # Skip invalid entries.
 815                                 # Result will be ugly, but prevents crash.
 816                                 if ( is_null( $title ) ) {
 817                                         continue;
 818                                 }
 819                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
 820
 821                                 # Check if it's in the link cache already
 822                                 if ( $wgLinkCache->getGoodLinkID( $pdbk ) ) {
 823                                         $colours[$pdbk] = 1;
 824                                 } elseif ( $wgLinkCache->isBadLink( $pdbk ) ) {
 825                                         $colours[$pdbk] = 0;
 826                                 } else {
 827                                         # Not in the link cache, add it to the query
 828                                         if ( !isset( $current ) ) {
 829                                                 $current = $val;
 830                                                 $query =  "SELECT cur_id, cur_namespace, cur_title";
 831                                                 if ( $threshold > 0 ) {
 832                                                         $query .= ", LENGTH(cur_text) AS cur_len, cur_is_redirect";
 833                                                 }
 834                                                 $query .= " FROM $cur WHERE (cur_namespace=$val AND cur_title IN(";
 835                                         } elseif ( $current != $val ) {
 836                                                 $current = $val;
 837                                                 $query .= ")) OR (cur_namespace=$val AND cur_title IN(";
 838                                         } else {
 839                                                 $query .= ", ";
 840                                         }
 841
 842                                         $query .= $dbr->addQuotes( $dbkeys[$key] );
 843                                 }
 844                         }
 845                         if ( $query ) {
 846                                 $query .= "))";
 847                                 if ( $options & RLH_FOR_UPDATE ) {
 848                                         $query .= " FOR UPDATE";
 849                                 }
 850
 851                                 $res = $dbr->query( $query, $fname );
 852
 853                                 # Fetch data and form into an associative array
 854                                 # non-existent = broken
 855                                 # 1 = known
 856                                 # 2 = stub
 857                                 while ( $s = $dbr->fetchObject($res) ) {
 858                                         $title = Title::makeTitle( $s->cur_namespace, $s->cur_title );
 859                                         $pdbk = $title->getPrefixedDBkey();
 860                                         $wgLinkCache->addGoodLink( $s->cur_id, $pdbk );
 861
 862                                         if ( $threshold >  0 ) {
 863                                                 $size = $s->cur_len;
 864                                                 if ( $s->cur_is_redirect || $s->cur_namespace != 0 || $length < $threshold ) {
 865                                                         $colours[$pdbk] = 1;
 866                                                 } else {
 867                                                         $colours[$pdbk] = 2;
 868                                                 }
 869                                         } else {
 870                                                 $colours[$pdbk] = 1;
 871                                         }
 872                                 }
 873                         }
 874                         wfProfileOut( "$fname-check" );
 875
 876                         # Construct search and replace arrays
 877                         wfProfileIn( "$fname-construct" );
 878                         $search = $replace = array();
 879                         foreach ( $namespaces as $key => $ns ) {
 880                                 $pdbk = $pdbks[$key];
 881                                 $search[] = $tmpLinks[0][$key];
 882                                 $title = $titles[$key];
 883                                 if ( empty( $colours[$pdbk] ) ) {
 884                                         $wgLinkCache->addBadLink( $pdbk );
 885                                         $colours[$pdbk] = 0;
 886                                         $replace[] = $sk->makeBrokenLinkObj( $title, $texts[$key], $queries[$key] );
 887                                 } elseif ( $colours[$pdbk] == 1 ) {
 888                                         $replace[] = $sk->makeKnownLinkObj( $title, $texts[$key], $queries[$key] );
 889                                 } elseif ( $colours[$pdbk] == 2 ) {
 890                                         $replace[] = $sk->makeStubLinkObj( $title, $texts[$key], $queries[$key] );
 891                                 }
 892                         }
 893                         wfProfileOut( "$fname-construct" );
 894                         # Do the thing
 895                         wfProfileIn( "$fname-replace" );
 896                         $this->mBodytext = str_replace( $search, $replace, $this->mBodytext );
 897                         wfProfileOut( "$fname-replace" );
 898                 }
 899                 wfProfileOut( $fname );
 900                 return $colours;
 901         }
 902 }
 903
 904 }
 905 ?>