includes/OutputPage.php

   1 <?
   2 # See design.doc
   3
   4 function linkToMathImage ( $tex, $outputhash )
   5 {
   6     global $wgMathPath;
   7     return "<img src=\"".$wgMathPath."/".$outputhash.".png\" alt=\"".wfEscapeHTML($tex)."\">";
   8 }
   9
  10 function renderMath( $tex )
  11 {
  12     global $wgUser, $wgMathDirectory, $wgTmpDirectory, $wgInputEncoding;
  13     $mf   = wfMsg( "math_failure" );
  14     $munk = wfMsg( "math_unknown_error" );
  15
  16     $fname = "renderMath";
  17
  18     $math = $wgUser->getOption("math");
  19     if ($math == 3)
  20         return ('$ '.wfEscapeHTML($tex).' $');
  21
  22     $md5 = md5($tex);
  23     $md5_sql = mysql_escape_string(pack("H32", $md5));
  24     if ($math == 0)
  25         $sql = "SELECT math_outputhash FROM math WHERE math_inputhash = '".$md5_sql."'";
  26     else
  27         $sql = "SELECT math_outputhash,math_html_conservativeness,math_html FROM math WHERE math_inputhash = '".$md5_sql."'";
  28
  29     $res = wfQuery( $sql, $fname );
  30     if ( wfNumRows( $res ) == 0 )
  31     {
  32         $cmd = "./math/texvc ".escapeshellarg($wgTmpDirectory)." ".
  33                       escapeshellarg($wgMathDirectory)." ".escapeshellarg($tex)." ".escapeshellarg($wgInputEncoding);
  34         $contents = `$cmd`;
  35
  36         if (strlen($contents) == 0)
  37             return "<b>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</b>";
  38         $retval = substr ($contents, 0, 1);
  39         if (($retval == "C") || ($retval == "M") || ($retval == "L")) {
  40             if ($retval == "C")
  41                 $conservativeness = 2;
  42             else if ($retval == "M")
  43                 $conservativeness = 1;
  44             else
  45                 $conservativeness = 0;
  46             $outdata = substr ($contents, 33);
  47
  48             $i = strpos($outdata, "\000");
  49
  50             $outhtml = substr($outdata, 0, $i);
  51             $mathml = substr($outdata, $i+1);
  52
  53             $sql_html = "'".mysql_escape_string($outhtml)."'";
  54             $sql_mathml = "'".mysql_escape_string($mathml)."'";
  55         } else if (($retval == "c") || ($retval == "m") || ($retval == "l"))  {
  56             $outhtml = substr ($contents, 33);
  57             if ($retval == "c")
  58                 $conservativeness = 2;
  59             else if ($retval == "m")
  60                 $conservativeness = 1;
  61             else
  62                 $conservativeness = 0;
  63             $sql_html = "'".mysql_escape_string($outhtml)."'";
  64             $mathml = '';
  65             $sql_mathml = 'NULL';
  66         } else if ($retval == "X") {
  67             $outhtml = '';
  68             $mathml = substr ($contents, 33);
  69             $sql_html = 'NULL';
  70             $sql_mathml = "'".mysql_escape_string($mathml)."'";
  71             $conservativeness = 0;
  72         } else if ($retval == "+") {
  73             $outhtml = '';
  74             $mathml = '';
  75             $sql_html = 'NULL';
  76             $sql_mathml = 'NULL';
  77             $conservativeness = 0;
  78         } else {
  79             if ($retval == "E")
  80                 $errmsg = wfMsg( "math_lexing_error" );
  81             else if ($retval == "S")
  82                 $errmsg = wfMsg( "math_syntax_error" );
  83             else if ($retval == "F")
  84                 $errmsg = wfMsg( "math_unknown_function" );
  85             else
  86                 $errmsg = $munk;
  87             return "<h3>".$mf." (".$errmsg.substr($contents, 1)."): ".wfEscapeHTML($tex)."</h3>";
  88         }
  89
  90         $outmd5 = substr ($contents, 1, 32);
  91         if (!preg_match("/^[a-f0-9]{32}$/", $outmd5))
  92             return "<b>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</b>";
  93
  94         $outmd5_sql = mysql_escape_string(pack("H32", $outmd5));
  95
  96         $sql = "REPLACE INTO math VALUES ('".$md5_sql."', '".$outmd5_sql."', ".$conservativeness.", ".$sql_html.", ".$sql_mathml.")";
  97
  98         $res = wfQuery( $sql, $fname );
  99         # we don't really care if it fails
 100
 101         if (($math == 0) || ($rpage->math_html == '') || (($math == 1) && ($conservativeness != 2)) || (($math == 4) && ($conservativeness == 0)))
 102             return linkToMathImage($tex, $outmd5);
 103         else
 104             return $outhtml;
 105     } else {
 106         $rpage = wfFetchObject ( $res );
 107         $outputhash = unpack( "H32md5", $rpage->math_outputhash . "                " );
 108         $outputhash = $outputhash ['md5'];
 109
 110         if (($math == 0) || ($rpage->math_html == '') || (($math == 1) && ($rpage->math_html_conservativeness != 2)) || (($math == 4) && ($rpage->math_html_conservativeness == 0)))
 111             return linkToMathImage ( $tex, $outputhash );
 112         else
 113             return $rpage->math_html;
 114     }
 115 }
 116
 117 class OutputPage {
 118         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
 119         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
 120         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
 121         var $mSubtitle, $mRedirect, $mAutonumber, $mHeadtext;
 122         var $mLastModified;
 123
 124         var $mDTopen, $mLastSection; # Used for processing DL, PRE
 125         var $mLanguageLinks, $mSupressQuickbar;
 126
 127         function OutputPage()
 128         {
 129                 $this->mHeaders = $this->mCookies = $this->mMetatags =
 130                 $this->mKeywords = $this->mLinktags = array();
 131                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
 132                 $this->mLastSection = $this->mRedirect = $this->mLastModified =
 133                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy = "";
 134                 $this->mIsarticle = $this->mPrintable = true;
 135                 $this->mSupressQuickbar = $this->mDTopen = $this->mPrintable = false;
 136                 $this->mLanguageLinks = array();
 137                 $this->mAutonumber = 0;
 138         }
 139
 140         function addHeader( $name, $val ) { array_push( $this->mHeaders, "$name: $val" ) ; }
 141         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
 142         function redirect( $url ) { $this->mRedirect = $url; }
 143
 144         # To add an http-equiv meta tag, precede the name with "http:"
 145         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
 146         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
 147         function addLink( $rel, $rev, $target ) { array_push( $this->mLinktags, array( $rel, $rev, $target ) ); }
 148
 149         function checkLastModified ( $timestamp )
 150         {
 151                 global $wgLang, $wgCachePages, $wgUser;
 152                 if( !$wgCachePages ) return;
 153                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
 154                         # IE 5.0 has probs with our caching
 155                         #wfDebug( "-- bad client, not caching\n", false );
 156                         return;
 157                 }
 158                 if( $wgUser->getOption( "nocache" ) ) return;
 159
 160                 if( $_SERVER["HTTP_IF_MODIFIED_SINCE"] != "" ) {
 161                         $ismodsince = wfUnix2Timestamp( strtotime( $_SERVER["HTTP_IF_MODIFIED_SINCE"] ) );
 162                         #wfDebug( "-- client send If-Modified-Since: " . $_SERVER["HTTP_IF_MODIFIED_SINCE"] . "\n", false );
 163                         $lastmod = gmdate( "D, j M Y H:i:s", wfTimestamp2Unix(
 164                                 max( $timestamp, $wgUser->mTouched ) ) ) . " GMT";
 165                         #wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 166
 167                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
 168                                 # Make sure you're in a place you can leave when you call us!
 169                                 header( "HTTP/1.0 304 Not Modified" );
 170                                 header( "Expires: Mon, 15 Jan 2001 00:00:00 GMT" ); # Cachers always validate the page!
 171                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 172                                 header( "Last-Modified: {$lastmod}" );
 173                                 #wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 174                                 exit;
 175                         } else {
 176                                 #wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 177                                 $this->mLastModified = $lastmod;
 178                         }
 179                 }
 180         }
 181
 182         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 183         function setHTMLtitle( $name ) { $this->mHTMLtitle = $name; }
 184         function setPageTitle( $name ) { $this->mPagetitle = $name; }
 185         function getPageTitle() { return $this->mPagetitle; }
 186         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 187         function getSubtitle() { return $this->mSubtitle; }
 188         function setArticleFlag( $v ) { $this->mIsarticle = $v; }
 189         function isArticle() { return $this->mIsarticle; }
 190         function setPrintable() { $this->mPrintable = true; }
 191         function isPrintable() { return $this->mPrintable; }
 192
 193         function getLanguageLinks() {
 194                 global $wgUseNewInterlanguage, $wgTitle, $wgLanguageCode;
 195                 global $wgDBconnection, $wgDBname, $wgDBintlname;
 196
 197                 if ( ! $wgUseNewInterlanguage )
 198                         return $this->mLanguageLinks;
 199
 200                 mysql_select_db( $wgDBintlname, $wgDBconnection ) or die(
 201                           htmlspecialchars(mysql_error()) );
 202
 203                 $list = array();
 204                 $sql = "SELECT * FROM ilinks WHERE lang_from=\"" .
 205                   "{$wgLanguageCode}\" AND title_from=\"" . $wgTitle->getDBkey() . "\"";
 206                 $res = mysql_query( $sql, $wgDBconnection );
 207
 208                 while ( $q = mysql_fetch_object ( $res ) ) {
 209                         $list[] = $q->lang_to . ":" . $q->title_to;
 210                 }
 211                 mysql_free_result( $res );
 212                 mysql_select_db( $wgDBname, $wgDBconnection ) or die(
 213                   htmlspecialchars(mysql_error()) );
 214
 215                 return $list;
 216         }
 217
 218         function supressQuickbar() { $this->mSupressQuickbar = true; }
 219         function isQuickbarSupressed() { return $this->mSupressQuickbar; }
 220
 221         function addHTML( $text ) { $this->mBodytext .= $text; }
 222         function addHeadtext( $text ) { $this->mHeadtext .= $text; }
 223         function debug( $text ) { $this->mDebugtext .= $text; }
 224
 225         # First pass--just handle <nowiki> sections, pass the rest off
 226         # to doWikiPass2() which does all the real work.
 227         #
 228
 229         function addWikiText( $text, $linestart = true )
 230         {
 231                 global $wgUseTeX;
 232                 wfProfileIn( "OutputPage::addWikiText" );
 233                 $unique  = "3iyZiyA7iMwg5rhxP0Dcc9oTnj8qD1jm1Sfv4";
 234                 $unique2 = "4LIQ9nXtiYFPCSfitVwDw7EYwQlL4GeeQ7qSO";
 235                 $unique3 = "fPaA8gDfdLBqzj68Yjg9Hil3qEF8JGO0uszIp";
 236                 $nwlist = array();
 237                 $nwsecs = 0;
 238                 $mathlist = array();
 239                 $mathsecs = 0;
 240                 $prelist = array ();
 241                 $presecs = 0;
 242                 $stripped = "";
 243                 $stripped2 = "";
 244                 $stripped3 = "";
 245
 246                 while ( "" != $text ) {
 247                         $p = preg_split( "/<\\s*nowiki\\s*>/i", $text, 2 );
 248                         $stripped .= $p[0];
 249                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $text = ""; }
 250                         else {
 251                                 $q = preg_split( "/<\\/\\s*nowiki\\s*>/i", $p[1], 2 );
 252                                 ++$nwsecs;
 253                                 $nwlist[$nwsecs] = wfEscapeHTMLTagsOnly($q[0]);
 254                                 $stripped .= $unique;
 255                                 $text = $q[1];
 256                         }
 257                 }
 258
 259                 if( $wgUseTeX ) {
 260                         while ( "" != $stripped ) {
 261                                 $p = preg_split( "/<\\s*math\\s*>/i", $stripped, 2 );
 262                                 $stripped2 .= $p[0];
 263                                 if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $stripped = ""; }
 264                                 else {
 265                                         $q = preg_split( "/<\\/\\s*math\\s*>/i", $p[1], 2 );
 266                                         ++$mathsecs;
 267                                         $mathlist[$mathsecs] = renderMath($q[0]);
 268                                         $stripped2 .= $unique2;
 269                                         $stripped = $q[1];
 270                                 }
 271                         }
 272                 } else {
 273                         $stripped2 = $stripped;
 274                 }
 275
 276                 while ( "" != $stripped2 ) {
 277                         $p = preg_split( "/<\\s*pre\\s*>/i", $stripped2, 2 );
 278                         $stripped3 .= $p[0];
 279                         if ( ( count( $p ) < 2 ) || ( "" == $p[1] ) ) { $stripped2 = ""; }
 280                         else {
 281                                 $q = preg_split( "/<\\/\\s*pre\\s*>/i", $p[1], 2 );
 282                                 ++$presecs;
 283                                 $prelist[$presecs] = "<pre>". wfEscapeHTMLTagsOnly($q[0]). "</pre>";
 284                                 $stripped3 .= $unique3;
 285                                 $stripped2 = $q[1];
 286                         }
 287                 }
 288
 289                 $text = $this->doWikiPass2( $stripped3, $linestart );
 290
 291                 for ( $i = 1; $i <= $presecs; ++$i ) {
 292                         $text = preg_replace( "/{$unique3}/", str_replace( '$', '\$', $prelist[$i] ), $text, 1 );
 293                 }
 294
 295                 for ( $i = 1; $i <= $mathsecs; ++$i ) {
 296                         $text = preg_replace( "/{$unique2}/", str_replace( '$', '\$', $mathlist[$i] ), $text, 1 );
 297                 }
 298
 299                 for ( $i = 1; $i <= $nwsecs; ++$i ) {
 300                         $text = preg_replace( "/{$unique}/", str_replace( '$', '\$', $nwlist[$i] ), $text, 1 );
 301                 }
 302                 $this->addHTML( $text );
 303                 wfProfileOut();
 304         }
 305
 306         # Finally, all the text has been munged and accumulated into
 307         # the object, let's actually output it:
 308         #
 309         function output()
 310         {
 311                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 312                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 313                 wfProfileIn( "OutputPage::output" );
 314                 $sk = $wgUser->getSkin();
 315
 316                 wfProfileIn( "OutputPage::output-headers" );
 317                 if( $this->mLastModified != "" ) {
 318                         header( "Cache-Control: private, must-revalidate, max-age=0" );
 319                         header( "Last-modified: {$this->mLastModified}" );
 320                 } else {
 321                         header( "Cache-Control: no-cache" ); # Experimental - see below
 322                         header( "Pragma: no-cache" );
 323                         header( "Last-modified: " . gmdate( "D, j M Y H:i:s" ) . " GMT" );
 324                 }
 325                 header( "Expires: Mon, 15 Jan 2001 00:00:00 GMT" ); # Cachers always validate the page!
 326
 327                 header( "Content-type: text/html; charset={$wgOutputEncoding}" );
 328                 header( "Content-language: {$wgLanguageCode}" );
 329
 330                 if ( "" != $this->mRedirect ) {
 331                         header( "Location: {$this->mRedirect}" );
 332                         wfProfileOut();
 333                         return;
 334                 }
 335
 336                 $exp = time() + $wgCookieExpiration;
 337                 foreach( $this->mCookies as $name => $val ) {
 338                         setcookie( $name, $val, $exp, "/" );
 339                 }
 340                 wfProfileOut();
 341
 342                 wfProfileIn( "OutputPage::output-middle" );
 343                 $sk->initPage();
 344                 $this->out( $this->headElement() );
 345
 346                 $this->out( "\n<body" );
 347                 $ops = $sk->getBodyOptions();
 348                 foreach ( $ops as $name => $val ) {
 349                         $this->out( " $name='$val'" );
 350                 }
 351                 $this->out( ">\n" );
 352                 if ( $wgDebugComments ) {
 353                         $this->out( "<!-- Wiki debugging output:\n" .
 354                           $this->mDebugtext . "-->\n" );
 355                 }
 356                 $this->out( $sk->beforeContent() );
 357                 wfProfileOut();
 358
 359                 wfProfileIn( "OutputPage::output-bodytext" );
 360                 $this->out( $this->mBodytext );
 361                 wfProfileOut();
 362                 wfProfileIn( "OutputPage::output-after" );
 363                 $this->out( $sk->afterContent() );
 364                 wfProfileOut();
 365
 366                 wfProfileOut(); # A hack - we can't report after here
 367                 $this->out( $this->reportTime() );
 368
 369                 $this->out( "\n</body></html>" );
 370                 flush();
 371         }
 372
 373         function out( $ins )
 374         {
 375                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 376                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 377                         $outs = $ins;
 378                 } else {
 379                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 380                         if ( false === $outs ) { $outs = $ins; }
 381                 }
 382                 print $outs;
 383         }
 384
 385         function setEncodings()
 386         {
 387                 global $HTTP_SERVER_VARS, $wgInputEncoding, $wgOutputEncoding;
 388                 global $wgUser, $wgLang;
 389
 390                 $wgInputEncoding = strtolower( $wgInputEncoding );
 391                 $s = $HTTP_SERVER_VARS['HTTP_ACCEPT_CHARSET'];
 392
 393                 if( $wgUser->getOption( 'altencoding' ) ) {
 394                         $wgLang->setAltEncoding();
 395                         return;
 396                 }
 397
 398                 if ( "" == $s ) {
 399                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 400                         return;
 401                 }
 402                 $a = explode( ",", $s );
 403                 $best = 0.0;
 404                 $bestset = "*";
 405
 406                 foreach ( $a as $s ) {
 407                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 408                                 $set = $m[1];
 409                                 $q = (float)($m[2]);
 410                         } else {
 411                                 $set = $s;
 412                                 $q = 1.0;
 413                         }
 414                         if ( $q > $best ) {
 415                                 $bestset = $set;
 416                                 $best = $q;
 417                         }
 418                 }
 419                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 420                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 421                 $wgOutputEncoding = strtolower( $bestset );
 422
 423 # Disable for now
 424 #
 425                 $wgOutputEncoding = $wgInputEncoding;
 426         }
 427
 428         function reportTime()
 429         {
 430                 global $wgRequestTime, $wgDebugLogFile, $HTTP_SERVER_VARS;
 431                 global $wgProfiling, $wgProfileStack, $wgUser;
 432
 433                 list( $usec, $sec ) = explode( " ", microtime() );
 434                 $now = (float)$sec + (float)$usec;
 435
 436                 list( $usec, $sec ) = explode( " ", $wgRequestTime );
 437                 $start = (float)$sec + (float)$usec;
 438                 $elapsed = $now - $start;
 439
 440                 if ( "" != $wgDebugLogFile ) {
 441                         $prof = "";
 442                         if( $wgProfiling and count( $wgProfileStack ) ) {
 443                                 $lasttime = $start;
 444                                 foreach( $wgProfileStack as $ile ) {
 445                                         # "foo::bar 99 0.12345 1 0.23456 2"
 446                                         if( preg_match( '/^(\S+)\s+([0-9]+)\s+([0-9\.]+)\s+([0-9\.]+)\s+([0-9\.]+)\s+([0-9\.]+)/', $ile, $m ) ) {
 447                                                 $thisstart = (float)$m[3] + (float)$m[4] - $start;
 448                                                 $thisend = (float)$m[5] + (float)$m[6] - $start;
 449                                                 $thiselapsed = $thisend - $thisstart;
 450                                                 $thispercent = $thiselapsed / $elapsed * 100.0;
 451
 452                                                 $prof .= sprintf( "\tat %04.3f in %04.3f (%2.1f%%) - %s %s\n",
 453                                                         $thisstart, $thiselapsed, $thispercent,
 454                                                         str_repeat( "*", $m[2] ), $m[1] );
 455                                                 $lasttime = $thistime;
 456                                                 #$prof .= "\t(^ $ile)\n";
 457                                         } else {
 458                                                 $prof .= "\t?broken? $ile\n";
 459                                         }
 460                                 }
 461                         }
 462
 463                         if( $forward = $HTTP_SERVER_VARS['HTTP_X_FORWARDED_FOR'] )
 464                                 $forward = " forwarded for $forward";
 465                         if( $client = $HTTP_SERVER_VARS['HTTP_CLIENT_IP'] )
 466                                 $forward .= " client IP $client";
 467                         if( $from = $HTTP_SERVER_VARS['HTTP_FROM'] )
 468                                 $forward .= " from $from";
 469                         if( $forward )
 470                                 $forward = "\t(proxied via {$HTTP_SERVER_VARS['REMOTE_ADDR']}{$forward})";
 471                         if($wgUser->getId() == 0)
 472                                 $forward .= " anon";
 473                         $log = sprintf( "%s\t%04.3f\t%s\n",
 474                           gmdate( "YmdHis" ), $elapsed,
 475                           urldecode( $HTTP_SERVER_VARS['REQUEST_URI'] . $forward ) );
 476                         error_log( $log . $prof, 3, $wgDebugLogFile );
 477                 }
 478                 $com = sprintf( "<!-- Time since request: %01.2f secs. -->",
 479                   $elapsed );
 480                 return $com;
 481         }
 482
 483         # Note: these arguments are keys into wfMsg(), not text!
 484         #
 485         function errorpage( $title, $msg )
 486         {
 487                 global $wgTitle;
 488
 489                 $this->mDebugtext .= "Original title: " .
 490                   $wgTitle->getPrefixedText() . "\n";
 491                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 492                 $this->setPageTitle( wfMsg( $title ) );
 493                 $this->setRobotpolicy( "noindex,nofollow" );
 494                 $this->setArticleFlag( false );
 495
 496                 $this->mBodytext = "";
 497                 $this->addHTML( "<p>" . wfMsg( $msg ) . "\n" );
 498                 $this->returnToMain( false );
 499
 500                 $this->output();
 501                 exit;
 502         }
 503
 504         function sysopRequired()
 505         {
 506                 global $wgUser;
 507
 508                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 509                 $this->setPageTitle( wfMsg( "sysoptitle" ) );
 510                 $this->setRobotpolicy( "noindex,nofollow" );
 511                 $this->setArticleFlag( false );
 512                 $this->mBodytext = "";
 513
 514                 $sk = $wgUser->getSkin();
 515                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 516                 $text = str_replace( "$1", $ap, wfMsg( "sysoptext" ) );
 517                 $this->addHTML( $text );
 518                 $this->returnToMain();
 519         }
 520
 521         function developerRequired()
 522         {
 523                 global $wgUser;
 524
 525                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 526                 $this->setPageTitle( wfMsg( "developertitle" ) );
 527                 $this->setRobotpolicy( "noindex,nofollow" );
 528                 $this->setArticleFlag( false );
 529                 $this->mBodytext = "";
 530
 531                 $sk = $wgUser->getSkin();
 532                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 533                 $text = str_replace( "$1", $ap, wfMsg( "developertext" ) );
 534                 $this->addHTML( $text );
 535                 $this->returnToMain();
 536         }
 537
 538         function databaseError( $fname )
 539         {
 540                 global $wgUser, $wgCommandLineMode;
 541
 542                 $this->setPageTitle( wfMsg( "databaseerror" ) );
 543                 $this->setRobotpolicy( "noindex,nofollow" );
 544                 $this->setArticleFlag( false );
 545
 546                 if ( $wgCommandLineMode ) {
 547                         $msg = wfMsg( "dberrortextcl" );
 548                 } else {
 549                         $msg = wfMsg( "dberrortextcl" );
 550                 }
 551                 $msg = str_replace( "$1", htmlspecialchars( wfLastDBquery() ), $msg );
 552                 $msg = str_replace( "$2", htmlspecialchars( $fname ), $msg );
 553                 $msg = str_replace( "$3", wfLastErrno(), $msg );
 554                 $msg = str_replace( "$4", htmlspecialchars( wfLastError() ), $msg );
 555
 556                 if ( $wgCommandLineMode ) {
 557                         print $msg;
 558                         exit();
 559                 }
 560                 $sk = $wgUser->getSkin();
 561                 $shlink = $sk->makeKnownLink( wfMsg( "searchhelppage" ),
 562                   wfMsg( "searchingwikipedia" ) );
 563                 $msg = str_replace( "$5", $shlink, $msg );
 564
 565                 $this->mBodytext = $msg;
 566                 $this->output();
 567                 exit();
 568         }
 569
 570         function readOnlyPage()
 571         {
 572                 global $wgUser, $wgReadOnlyFile;
 573
 574                 $this->setPageTitle( wfMsg( "readonly" ) );
 575                 $this->setRobotpolicy( "noindex,nofollow" );
 576                 $this->setArticleFlag( false );
 577
 578                 $reason = implode( "", file( $wgReadOnlyFile ) );
 579                 $text = str_replace( "$1", $reason, wfMsg( "readonlytext" ) );
 580                 $this->addHTML( $text );
 581                 $this->returnToMain( false );
 582         }
 583
 584         function fatalError( $message )
 585         {
 586                 $this->setPageTitle( wfMsg( "internalerror" ) );
 587                 $this->setRobotpolicy( "noindex,nofollow" );
 588                 $this->setArticleFlag( false );
 589
 590                 $this->mBodytext = $message;
 591                 $this->output();
 592                 exit;
 593         }
 594
 595         function unexpectedValueError( $name, $val )
 596         {
 597                 $msg = str_replace( "$1", $name, wfMsg( "unexpected" ) );
 598                 $msg = str_replace( "$2", $val, $msg );
 599                 $this->fatalError( $msg );
 600         }
 601
 602         function fileCopyError( $old, $new )
 603         {
 604                 $msg = str_replace( "$1", $old, wfMsg( "filecopyerror" ) );
 605                 $msg = str_replace( "$2", $new, $msg );
 606                 $this->fatalError( $msg );
 607         }
 608
 609         function fileRenameError( $old, $new )
 610         {
 611                 $msg = str_replace( "$1", $old, wfMsg( "filerenameerror" ) );
 612                 $msg = str_replace( "$2", $new, $msg );
 613                 $this->fatalError( $msg );
 614         }
 615
 616         function fileDeleteError( $name )
 617         {
 618                 $msg = str_replace( "$1", $name, wfMsg( "filedeleteerror" ) );
 619                 $this->fatalError( $msg );
 620         }
 621
 622         function fileNotFoundError( $name )
 623         {
 624                 $msg = str_replace( "$1", $name, wfMsg( "filenotfound" ) );
 625                 $this->fatalError( $msg );
 626         }
 627
 628         function returnToMain( $auto = true )
 629         {
 630                 global $wgUser, $wgOut, $returnto;
 631
 632                 $sk = $wgUser->getSkin();
 633                 if ( "" == $returnto ) {
 634                         $returnto = wfMsg( "mainpage" );
 635                 }
 636                 $link = $sk->makeKnownLink( $returnto, "" );
 637
 638                 $r = str_replace( "$1", $link, wfMsg( "returnto" ) );
 639                 if ( $auto ) {
 640                         $wgOut->addMeta( "http:Refresh", "10;url=" .
 641                           wfLocalUrlE( wfUrlencode( $returnto ) ) );
 642                 }
 643                 $wgOut->addHTML( "\n<p>$r\n" );
 644         }
 645
 646         # Well, OK, it's actually about 14 passes.  But since all the
 647         # hard lifting is done inside PHP's regex code, it probably
 648         # wouldn't speed things up much to add a real parser.
 649         #
 650         function doWikiPass2( $text, $linestart )
 651         {
 652                 global $wgUser, $wgLang;
 653                 wfProfileIn( "OutputPage::doWikiPass2" );
 654
 655                 $text = $this->removeHTMLtags( $text );
 656                 $text = $this->replaceVariables( $text );
 657
 658                 $text = preg_replace( "/(^|\n)-----*/", "\\1<hr>", $text );
 659                 $text = str_replace ( "<HR>", "<hr>", $text );
 660
 661                 $text = $this->doQuotes( $text );
 662                 $text = $this->doHeadings( $text );
 663                 $text = $this->doBlockLevels( $text, $linestart );
 664
 665                 $text = $wgLang->replaceDates( $text );
 666                 $text = $this->replaceExternalLinks( $text );
 667                 $text = $this->replaceInternalLinks ( $text );
 668
 669                 $text = $this->magicISBN( $text );
 670                 $text = $this->magicRFC( $text );
 671                 $text = $this->formatHeadings( $text );
 672
 673                 $sk = $wgUser->getSkin();
 674                 $text = $sk->transformContent( $text );
 675
 676                 wfProfileOut();
 677                 return $text;
 678         }
 679
 680         /* private */ function doQuotes( $text )
 681         {
 682                 $text = preg_replace( "/'''(.+)'''/mU", "<strong>\$1</strong>", $text );
 683                 $text = preg_replace( "/''(.+)''/mU", "<em>\$1</em>", $text );
 684                 return $text;
 685         }
 686
 687         /* private */ function doHeadings( $text )
 688         {
 689                 for ( $i = 6; $i >= 1; --$i ) {
 690                         $h = substr( "======", 0, $i );
 691                         $text = preg_replace( "/^{$h}([^=]+){$h}(\\s|$)/m",
 692                           "<h{$i}>\\1</h{$i}>\\2", $text );
 693                 }
 694                 return $text;
 695         }
 696
 697         # Note: we have to do external links before the internal ones,
 698         # and otherwise take great care in the order of things here, so
 699         # that we don't end up interpreting some URLs twice.
 700
 701         /* private */ function replaceExternalLinks( $text )
 702         {
 703                 wfProfileIn( "OutputPage::replaceExternalLinks" );
 704                 $text = $this->subReplaceExternalLinks( $text, "http", true );
 705                 $text = $this->subReplaceExternalLinks( $text, "https", true );
 706                 $text = $this->subReplaceExternalLinks( $text, "ftp", false );
 707                 $text = $this->subReplaceExternalLinks( $text, "gopher", false );
 708                 $text = $this->subReplaceExternalLinks( $text, "news", false );
 709                 $text = $this->subReplaceExternalLinks( $text, "mailto", false );
 710                 wfProfileOut();
 711                 return $text;
 712         }
 713
 714         /* private */ function subReplaceExternalLinks( $s, $protocol, $autonumber )
 715         {
 716                 global $wgUser, $printable;
 717                 global $wgAllowExternalImages;
 718
 719
 720                 $unique = "4jzAfzB8hNvf4sqyO9Edd8pSmk9rE2in0Tgw3";
 721                 $uc = "A-Za-z0-9_\\/~%\\-+&*#?!=()@\\x80-\\xFF";
 722
 723                 # this is  the list of separators that should be ignored if they
 724                 # are the last character of an URL but that should be included
 725                 # if they occur within the URL, e.g. "go to www.foo.com, where .."
 726                 # in this case, the last comma should not become part of the URL,
 727                 # but in "www.foo.com/123,2342,32.htm" it should.
 728                 $sep = ",;\.:";
 729                 $fnc = "A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF";
 730                 $images = "gif|png|jpg|jpeg";
 731
 732                 # PLEASE NOTE: The curly braces { } are not part of the regex,
 733                 # they are interpreted as part of the string (used to tell PHP
 734                 # that the content of the string should be inserted there).
 735                 $e1 = "/(^|[^\\[])({$protocol}:)([{$uc}{$sep}]+)\\/([{$fnc}]+)\\." .
 736                   "((?i){$images})([^{$uc}]|$)/";
 737
 738                 $e2 = "/(^|[^\\[])({$protocol}:)(([".$uc."]|[".$sep."][".$uc."])+)([^". $uc . $sep. "]|[".$sep."]|$)/";
 739                 $sk = $wgUser->getSkin();
 740
 741                 if ( $autonumber and $wgAllowExternalImages) { # Use img tags only for HTTP urls
 742                         $s = preg_replace( $e1, "\\1" . $sk->makeImage( "{$unique}:\\3" .
 743                           "/\\4.\\5", "\\4.\\5" ) . "\\6", $s );
 744                 }
 745                 $s = preg_replace( $e2, "\\1" . "<a href=\"{$unique}:\\3\"" .
 746                   $sk->getExternalLinkAttributes( "{$unique}:\\3", wfEscapeHTML(
 747                   "{$unique}:\\3" ) ) . ">" . wfEscapeHTML( "{$unique}:\\3" ) .
 748                   "</a>\\5", $s );
 749                 $s = str_replace( $unique, $protocol, $s );
 750
 751                 $a = explode( "[{$protocol}:", " " . $s );
 752                 $s = array_shift( $a );
 753                 $s = substr( $s, 1 );
 754
 755                 $e1 = "/^([{$uc}"."{$sep}]+)](.*)\$/sD";
 756                 $e2 = "/^([{$uc}"."{$sep}]+)\\s+([^\\]]+)](.*)\$/sD";
 757
 758                 foreach ( $a as $line ) {
 759                         if ( preg_match( $e1, $line, $m ) ) {
 760                                 $link = "{$protocol}:{$m[1]}";
 761                                 $trail = $m[2];
 762                                 if ( $autonumber ) { $text = "[" . ++$this->mAutonumber . "]"; }
 763                                 else { $text = wfEscapeHTML( $link ); }
 764                         } else if ( preg_match( $e2, $line, $m ) ) {
 765                                 $link = "{$protocol}:{$m[1]}";
 766                                 $text = $m[2];
 767                                 $trail = $m[3];
 768                         } else {
 769                                 $s .= "[{$protocol}:" . $line;
 770                                 continue;
 771                         }
 772                         if ( $printable == "yes") $paren = " (<i>" . htmlspecialchars ( $link ) . "</i>)";
 773                         else $paren = "";
 774                         $la = $sk->getExternalLinkAttributes( $link, $text );
 775                         $s .= "<a href='{$link}'{$la}>{$text}</a>{$paren}{$trail}";
 776
 777                 }
 778                 return $s;
 779         }
 780
 781         /* private */ function replaceInternalLinks( $s )
 782         {
 783                 global $wgTitle, $wgUser, $wgLang;
 784                 global $wgLinkCache, $wgInterwikiMagic;
 785                 global $wgNamespacesWithSubpages;
 786                 wfProfileIn( $fname = "OutputPage::replaceInternalLinks" );
 787
 788                 wfProfileIn( "$fname-setup" );
 789                 $tc = Title::legalChars() . "#";
 790                 $sk = $wgUser->getSkin();
 791
 792                 $a = explode( "[[", " " . $s );
 793                 $s = array_shift( $a );
 794                 $s = substr( $s, 1 );
 795
 796                 $e1 = "/^([{$tc}]+)\\|([^]]+)]](.*)\$/sD";
 797                 $e2 = "/^([{$tc}]+)]](.*)\$/sD";
 798                 wfProfileOut();
 799
 800                 wfProfileIn( "$fname-loop" );
 801                 foreach ( $a as $line ) {
 802                         if ( preg_match( $e1, $line, $m ) ) { # page with alternate text
 803
 804                                 $text = $m[2];
 805                                 $trail = $m[3];
 806
 807                         } else if ( preg_match( $e2, $line, $m ) ) { # page with normal text
 808
 809                                 $text = "";
 810                                 $trail = $m[2];
 811                         }
 812
 813                         else { # Invalid form; output directly
 814                                 $s .= "[[" . $line ;
 815                                 continue;
 816                         }
 817                         if(substr($m[1],0,1)=="/") { # subpage
 818                                 if(substr($m[1],-1,1)=="/") {                 # / at end means we don't want the slash to be shown
 819                                         $m[1]=substr($m[1],1,strlen($m[1])-2);
 820                                         $noslash=$m[1];
 821
 822                                 } else {
 823                                         $noslash=substr($m[1],1);
 824                                 }
 825                                 if($wgNamespacesWithSubpages[$wgTitle->getNamespace()]) { # subpages allowed here
 826                                         $link = $wgTitle->getPrefixedText(). "/" . trim($noslash);
 827                                         if(!$text) {
 828                                                 $text= $m[1];
 829                                         } # this might be changed for ugliness reasons
 830                                 } else {
 831                                         $link = $noslash; # no subpage allowed, use standard link
 832                                 }
 833                         } else { # no subpage
 834                                 $link = $m[1];
 835                         }
 836
 837                         if ( preg_match( "/^((?:i|x|[a-z]{2,3})(?:-[a-z0-9]+)?|[A-Za-z\\x80-\\xff]+):(.*)\$/", $link,  $m ) ) {
 838                                 $pre = strtolower( $m[1] );
 839                                 $suf = $m[2];
 840                                 if ( $wgLang->getNsIndex( $pre ) ==
 841                                   Namespace::getImage() ) {
 842                                         $nt = Title::newFromText( $suf );
 843                                         $name = $nt->getDBkey();
 844                                         if ( "" == $text ) { $text = $nt->GetText(); }
 845
 846                                         $wgLinkCache->addImageLink( $name );
 847                                         $s .= $sk->makeImageLink( $name,
 848                                           wfImageUrl( $name ), $text );
 849                                         $s .= $trail;
 850                                 } else if ( "media" == $pre ) {
 851                                         $nt = Title::newFromText( $suf );
 852                                         $name = $nt->getDBkey();
 853                                         if ( "" == $text ) { $text = $nt->GetText(); }
 854
 855                                         $wgLinkCache->addImageLink( $name );
 856                                         $s .= $sk->makeMediaLink( $name,
 857                                           wfImageUrl( $name ), $text );
 858                                         $s .= $trail;
 859                                 } else {
 860                                         $l = $wgLang->getLanguageName( $pre );
 861                                         if ( "" == $l or !$wgInterwikiMagic or
 862                                           Namespace::isTalk( $wgTitle->getNamespace() ) ) {
 863                                                 if ( "" == $text ) { $text = $link; }
 864                                                 $s .= $sk->makeLink( $link, $text, "", $trail );
 865                                         } else {
 866                                                 array_push( $this->mLanguageLinks, "$pre:$suf" );
 867                                                 $s .= $trail;
 868                                         }
 869                                 }
 870 #                       } else if ( 0 == strcmp( "##", substr( $link, 0, 2 ) ) ) {
 871 #                               $link = substr( $link, 2 );
 872 #                               $s .= "<a name=\"{$link}\">{$text}</a>{$trail}";
 873                         } else {
 874                                 if ( "" == $text ) { $text = $link; }
 875                                 $s .= $sk->makeLink( $link, $text, "", $trail );
 876                         }
 877                 }
 878                 wfProfileOut();
 879                 wfProfileOut();
 880                 return $s;
 881         }
 882
 883         # Some functions here used by doBlockLevels()
 884         #
 885         /* private */ function closeParagraph()
 886         {
 887                 $result = "";
 888                 if ( 0 != strcmp( "p", $this->mLastSection ) &&
 889                   0 != strcmp( "", $this->mLastSection ) ) {
 890                         $result = "</" . $this->mLastSection  . ">";
 891                 }
 892                 $this->mLastSection = "";
 893                 return $result;
 894         }
 895         # getCommon() returns the length of the longest common substring
 896         # of both arguments, starting at the beginning of both.
 897         #
 898         /* private */ function getCommon( $st1, $st2 )
 899         {
 900                 $fl = strlen( $st1 );
 901                 $shorter = strlen( $st2 );
 902                 if ( $fl < $shorter ) { $shorter = $fl; }
 903
 904                 for ( $i = 0; $i < $shorter; ++$i ) {
 905                         if ( $st1{$i} != $st2{$i} ) { break; }
 906                 }
 907                 return $i;
 908         }
 909         # These next three functions open, continue, and close the list
 910         # element appropriate to the prefix character passed into them.
 911         #
 912         /* private */ function openList( $char )
 913     {
 914                 $result = $this->closeParagraph();
 915
 916                 if ( "*" == $char ) { $result .= "<ul><li>"; }
 917                 else if ( "#" == $char ) { $result .= "<ol><li>"; }
 918                 else if ( ":" == $char ) { $result .= "<dl><dd>"; }
 919                 else if ( ";" == $char ) {
 920                         $result .= "<dl><dt>";
 921                         $this->mDTopen = true;
 922                 }
 923                 else { $result = "<!-- ERR 1 -->"; }
 924
 925                 return $result;
 926         }
 927
 928         /* private */ function nextItem( $char )
 929         {
 930                 if ( "*" == $char || "#" == $char ) { return "</li><li>"; }
 931                 else if ( ":" == $char || ";" == $char ) {
 932                         $close = "</dd>";
 933                         if ( $this->mDTopen ) { $close = "</dt>"; }
 934                         if ( ";" == $char ) {
 935                                 $this->mDTopen = true;
 936                                 return $close . "<dt>";
 937                         } else {
 938                                 $this->mDTopen = false;
 939                                 return $close . "<dd>";
 940                         }
 941                 }
 942                 return "<!-- ERR 2 -->";
 943         }
 944
 945         /* private */function closeList( $char )
 946         {
 947                 if ( "*" == $char ) { return "</li></ul>"; }
 948                 else if ( "#" == $char ) { return "</li></ol>"; }
 949                 else if ( ":" == $char ) {
 950                         if ( $this->mDTopen ) {
 951                                 $this->mDTopen = false;
 952                                 return "</dt></dl>";
 953                         } else {
 954                                 return "</dd></dl>";
 955                         }
 956                 }
 957                 return "<!-- ERR 3 -->";
 958         }
 959
 960         /* private */ function doBlockLevels( $text, $linestart )
 961         {
 962                 wfProfileIn( "OutputPage::doBlockLevels" );
 963                 # Parsing through the text line by line.  The main thing
 964                 # happening here is handling of block-level elements p, pre,
 965                 # and making lists from lines starting with * # : etc.
 966                 #
 967                 $a = explode( "\n", $text );
 968                 $text = $lastPref = "";
 969                 $this->mDTopen = $inBlockElem = false;
 970
 971                 if ( ! $linestart ) { $text .= array_shift( $a ); }
 972                 foreach ( $a as $t ) {
 973                         if ( "" != $text ) { $text .= "\n"; }
 974
 975                         $oLine = $t;
 976                         $opl = strlen( $lastPref );
 977                         $npl = strspn( $t, "*#:;" );
 978                         $pref = substr( $t, 0, $npl );
 979                         $pref2 = str_replace( ";", ":", $pref );
 980                         $t = substr( $t, $npl );
 981
 982                         if ( 0 != $npl && 0 == strcmp( $lastPref, $pref2 ) ) {
 983                                 $text .= $this->nextItem( substr( $pref, -1 ) );
 984
 985                                 if ( ";" == substr( $pref, -1 ) ) {
 986                                         $cpos = strpos( $t, ":" );
 987                                         if ( ! ( false === $cpos ) ) {
 988                                                 $term = substr( $t, 0, $cpos );
 989                                                 $text .= $term . $this->nextItem( ":" );
 990                                                 $t = substr( $t, $cpos + 1 );
 991                                         }
 992                                 }
 993                         } else if (0 != $npl || 0 != $opl) {
 994                                 $cpl = $this->getCommon( $pref, $lastPref );
 995
 996                                 while ( $cpl < $opl ) {
 997                                         $text .= $this->closeList( $lastPref{$opl-1} );
 998                                         --$opl;
 999                                 }
1000                                 if ( $npl <= $cpl && $cpl > 0 ) {
1001                                         $text .= $this->nextItem( $pref{$cpl-1} );
1002                                 }
1003                                 while ( $npl > $cpl ) {
1004                                         $char = substr( $pref, $cpl, 1 );
1005                                         $text .= $this->openList( $char );
1006
1007                                         if ( ";" == $char ) {
1008                                                 $cpos = strpos( $t, ":" );
1009                                                 if ( ! ( false === $cpos ) ) {
1010                                                         $term = substr( $t, 0, $cpos );
1011                                                         $text .= $term . $this->nextItem( ":" );
1012                                                         $t = substr( $t, $cpos + 1 );
1013                                                 }
1014                                         }
1015                                         ++$cpl;
1016                                 }
1017                                 $lastPref = $pref2;
1018                         }
1019                         if ( 0 == $npl ) { # No prefix--go to paragraph mode
1020                                 if ( preg_match(
1021                                   "/(<table|<blockquote|<h1|<h2|<h3|<h4|<h5|<h6)/i", $t ) ) {
1022                                         $text .= $this->closeParagraph();
1023                                         $inBlockElem = true;
1024                                 }
1025                                 if ( ! $inBlockElem ) {
1026                                         if ( " " == $t{0} ) {
1027                                                 $newSection = "pre";
1028                                                 # $t = wfEscapeHTML( $t );
1029                                         }
1030                                         else { $newSection = "p"; }
1031
1032                                         if ( 0 == strcmp( "", trim( $oLine ) ) ) {
1033                                                 $text .= $this->closeParagraph();
1034                                                 $text .= "<" . $newSection . ">";
1035                                         } else if ( 0 != strcmp( $this->mLastSection,
1036                                           $newSection ) ) {
1037                                                 $text .= $this->closeParagraph();
1038                                                 if ( 0 != strcmp( "p", $newSection ) ) {
1039                                                         $text .= "<" . $newSection . ">";
1040                                                 }
1041                                         }
1042                                         $this->mLastSection = $newSection;
1043                                 }
1044                                 if ( $inBlockElem &&
1045                                   preg_match( "/(<\\/table|<\\/blockquote|<\\/h1|<\\/h2|<\\/h3|<\\/h4|<\\/h5|<\\/h6)/i", $t ) ) {
1046                                         $inBlockElem = false;
1047                                 }
1048                         }
1049                         $text .= $t;
1050                 }
1051                 while ( $npl ) {
1052                         $text .= $this->closeList( $pref2{$npl-1} );
1053                         --$npl;
1054                 }
1055                 if ( "" != $this->mLastSection ) {
1056                         if ( "p" != $this->mLastSection ) {
1057                                 $text .= "</" . $this->mLastSection . ">";
1058                         }
1059                         $this->mLastSection = "";
1060                 }
1061                 wfProfileOut();
1062                 return $text;
1063         }
1064
1065         /* private */ function replaceVariables( $text )
1066         {
1067                 global $wgLang;
1068                 wfProfileIn( "OutputPage:replaceVariables" );
1069
1070                 /* As with sigs, use server's local time --
1071                    ensure this is appropriate for your audience! */
1072                 $v = date( "m" );
1073                 $text = str_replace( "{{CURRENTMONTH}}", $v, $text );
1074                 $v = $wgLang->getMonthName( date( "n" ) );
1075                 $text = str_replace( "{{CURRENTMONTHNAME}}", $v, $text );
1076                 $v = $wgLang->getMonthNameGen( date( "n" ) );
1077                 $text = str_replace( "{{CURRENTMONTHNAMEGEN}}", $v, $text );
1078                 $v = date( "j" );
1079                 $text = str_replace( "{{CURRENTDAY}}", $v, $text );
1080                 $v = $wgLang->getWeekdayName( date( "w" )+1 );
1081                 $text = str_replace( "{{CURRENTDAYNAME}}", $v, $text );
1082                 $v = date( "Y" );
1083                 $text = str_replace( "{{CURRENTYEAR}}", $v, $text );
1084                 $v = $wgLang->time( wfTimestampNow(), false );
1085                 $text = str_replace( "{{CURRENTTIME}}", $v, $text );
1086
1087                 if ( false !== strstr( $text, "{{NUMBEROFARTICLES}}" ) ) {
1088                         $v = wfNumberOfArticles();
1089                         $text = str_replace( "{{NUMBEROFARTICLES}}", $v, $text );
1090                 }
1091                 wfProfileOut();
1092                 return $text;
1093         }
1094
1095         /* private */ function removeHTMLtags( $text )
1096         {
1097                 wfProfileIn( "OutputPage::removeHTMLtags" );
1098                 $htmlpairs = array( # Tags that must be closed
1099                         "b", "i", "u", "font", "big", "small", "sub", "sup", "h1",
1100                         "h2", "h3", "h4", "h5", "h6", "cite", "code", "em", "s",
1101                         "strike", "strong", "tt", "var", "div", "center",
1102                         "blockquote", "ol", "ul", "dl", "table", "caption", "pre",
1103                         "ruby", "rt" , "rb" , "rp"
1104                 );
1105                 $htmlsingle = array(
1106                         "br", "p", "hr", "li", "dt", "dd"
1107                 );
1108                 $htmlnest = array( # Tags that can be nested--??
1109                         "table", "tr", "td", "th", "div", "blockquote", "ol", "ul",
1110                         "dl", "font", "big", "small", "sub", "sup"
1111                 );
1112                 $tabletags = array( # Can only appear inside table
1113                         "td", "th", "tr"
1114                 );
1115
1116                 $htmlsingle = array_merge( $tabletags, $htmlsingle );
1117                 $htmlelements = array_merge( $htmlsingle, $htmlpairs );
1118
1119                 $htmlattrs = array( # Allowed attributes--no scripting, etc.
1120                         "title", "align", "lang", "dir", "width", "height",
1121                         "bgcolor", "clear", /* BR */ "noshade", /* HR */
1122                         "cite", /* BLOCKQUOTE, Q */ "size", "face", "color",
1123                         /* FONT */ "type", "start", "value", "compact",
1124                         /* For various lists, mostly deprecated but safe */
1125                         "summary", "width", "border", "frame", "rules",
1126                         "cellspacing", "cellpadding", "valign", "char",
1127                         "charoff", "colgroup", "col", "span", "abbr", "axis",
1128                         "headers", "scope", "rowspan", "colspan", /* Tables */
1129                         "id", "class", "name", "style" /* For CSS */
1130                 );
1131
1132                 # Remove HTML comments
1133                 $text = preg_replace( "/<!--.*-->/sU", "", $text );
1134
1135                 $bits = explode( "<", $text );
1136                 $text = array_shift( $bits );
1137                 $tagstack = array(); $tablestack = array();
1138
1139                 foreach ( $bits as $x ) {
1140                         $prev = error_reporting( E_ALL & ~( E_NOTICE | E_WARNING ) );
1141                         preg_match( "/^(\\/?)(\\w+)([^>]*)(\\/{0,1}>)([^<]*)$/",
1142                           $x, $regs );
1143                         list( $qbar, $slash, $t, $params, $brace, $rest ) = $regs;
1144                         error_reporting( $prev );
1145
1146                         $badtag = 0 ;
1147                         if ( in_array( $t = strtolower( $t ), $htmlelements ) ) {
1148                                 # Check our stack
1149                                 if ( $slash ) {
1150                                         # Closing a tag...
1151                                         if ( ! in_array( $t, $htmlsingle ) &&
1152                                           ( $ot = array_pop( $tagstack ) ) != $t ) {
1153                                                 array_push( $tagstack, $ot );
1154                                                 $badtag = 1;
1155                                         } else {
1156                                                 if ( $t == "table" ) {
1157                                                         $tagstack = array_pop( $tablestack );
1158                                                 }
1159                                                 $newparams = "";
1160                                         }
1161                                 } else {
1162                                         # Keep track for later
1163                                         if ( in_array( $t, $tabletags ) &&
1164                                           ! in_array( "table", $tagstack ) ) {
1165                                                 $badtag = 1;
1166                                         } else if ( in_array( $t, $tagstack ) &&
1167                                           ! in_array ( $t , $htmlnest ) ) {
1168                                                 $badtag = 1 ;
1169                                         } else if ( ! in_array( $t, $htmlsingle ) ) {
1170                                                 if ( $t == "table" ) {
1171                                                         array_push( $tablestack, $tagstack );
1172                                                         $tagstack = array();
1173                                                 }
1174                                                 array_push( $tagstack, $t );
1175                                         }
1176                                         # Strip non-approved attributes from the tag
1177                                         $newparams = preg_replace(
1178                                           "/(\\w+)(\\s*=\\s*([^\\s\">]+|\"[^\">]*\"))?/e",
1179                                           "(in_array(strtolower(\"\$1\"),\$htmlattrs)?(\"\$1\".((\"x\$3\" != \"x\")?\"=\$3\":'')):'')",
1180                                           $params);
1181                                 }
1182                                 if ( ! $badtag ) {
1183                                         $rest = str_replace( ">", "&gt;", $rest );
1184                                         $text .= "<$slash$t$newparams$brace$rest";
1185                                         continue;
1186                                 }
1187                         }
1188                         $text .= "&lt;" . str_replace( ">", "&gt;", $x);
1189                 }
1190                 # Close off any remaining tags
1191                 while ( $t = array_pop( $tagstack ) ) {
1192                         $text .= "</$t>\n";
1193                         if ( $t == "table" ) { $tagstack = array_pop( $tablestack ); }
1194                 }
1195                 wfProfileOut();
1196                 return $text;
1197         }
1198
1199
1200 /*
1201  *
1202  * This function accomplishes several tasks:
1203  * 1) Auto-number headings if that option is enabled
1204  * 2) Add an [edit] link to sections for logged in users who have enabled the option
1205  * 3) Add a Table of contents on the top for users who have enabled the option
1206  * 4) Auto-anchor headings
1207  *
1208  * It loops through all headlines, collects the necessary data, then splits up the
1209  * string and re-inserts the newly formatted headlines.
1210  *
1211  * */
1212         /* private */ function formatHeadings( $text )
1213         {
1214                 global $wgUser,$wgArticle,$wgTitle,$wpPreview;
1215                 $nh=$wgUser->getOption( "numberheadings" );
1216                 $st=$wgUser->getOption( "showtoc" );
1217                 $es=$wgUser->getID() && $wgUser->getOption( "editsection" );
1218                 if($wgTitle->getPrefixedText()==wfMsg("mainpage")) {$st=0;}
1219
1220                 $sk=$wgUser->getSkin();
1221                 preg_match_all("/<H([1-6])(.*?>)(.*?)<\/H[1-6]>/i",$text,$matches);
1222
1223                 $c=0;
1224
1225                 foreach($matches[3] as $headline) {
1226                         if($level) { $prevlevel=$level;}
1227                         $level=$matches[1][$c];
1228                         if(($nh||$st) && $prevlevel && $level>$prevlevel) {
1229
1230                                 $h[$level]=0; // reset when we enter a new level
1231                                 $toc.=$sk->tocIndent($level-$prevlevel);
1232                                 $toclevel+=$level-$prevlevel;
1233
1234                         }
1235                         if(($nh||$st) && $level<$prevlevel) {
1236                                 $h[$level+1]=0; // reset when we step back a level
1237                                 $toc.=$sk->tocUnindent($prevlevel-$level);
1238                                 $toclevel-=$prevlevel-$level;
1239
1240                         }
1241                         $h[$level]++; // count number of headlines for each level
1242
1243                         if($nh||$st) {
1244                                 for($i=1;$i<=$level;$i++) {
1245                                         if($h[$i]) {
1246                                                 if($dot) {$numbering.=".";}
1247                                                 $numbering.=$h[$i];
1248                                                 $dot=1;
1249                                         }
1250                                 }
1251                         }
1252
1253
1254                         $canonized_headline=preg_replace("/<.*?>/","",$headline); // strip out HTML
1255                         $tocline=$canonized_headline;
1256                         $canonized_headline=str_replace('"',"",$canonized_headline);
1257                         $canonized_headline=str_replace(" ","_",trim($canonized_headline));
1258                         $refer[$c]=$canonized_headline;
1259                         $refers[$canonized_headline]++;  // count how many in assoc. array so we can track dupes in anchors
1260                         $refcount[$c]=$refers[$canonized_headline];
1261                         if($nh||$st) {
1262                                 $tocline=$numbering ." ". $tocline;
1263                                 if($nh) {
1264                                         $headline=$numbering . " " . $headline; // the two are different if the line contains a link
1265                                 }
1266                         }
1267                         $anchor=$canonized_headline;
1268                         if($refcount[$c]>1) {$anchor.="_".$refcount[$c];}
1269                         if($st) {
1270                                 $toc.=$sk->tocLine($anchor,$tocline,$toclevel);
1271                         }
1272                         if($es && !isset($wpPreview)) {
1273                                 $head[$c].=$sk->editSectionLink($c+1);
1274                         }
1275                         $head[$c].="<H".$level.$matches[2][$c]
1276                          ."<a name=\"".$anchor."\">"
1277                          .$headline
1278                          ."</a>"
1279                          ."</H".$level.">";
1280                         $numbering="";
1281                         $c++;
1282                         $dot=0;
1283                 }
1284
1285                 if($st) {
1286                         $toclines=$c;
1287                         $toc.=$sk->tocUnindent($toclevel);
1288                         $toc=$sk->tocTable($toc);
1289                 }
1290
1291                 // split up and insert constructed headlines
1292
1293                 $blocks=preg_split("/<H[1-6].*?>.*?<\/H[1-6]>/i",$text);
1294                 $i=0;
1295
1296
1297                 foreach($blocks as $block) {
1298                         if($es && !isset($wpPreview) && $c>0 && $i==0) {
1299                                 $full.=$sk->editSectionLink(0);
1300                         }
1301                         $full.=$block;
1302                         if($st && $toclines>3 && !$i) {
1303                                 $full="<a name=\"top\"></a>".$full.$toc;
1304                         }
1305
1306                         $full.=$head[$i];
1307                         $i++;
1308                 }
1309                 return $full;
1310         }
1311
1312         /* private */ function magicISBN( $text )
1313         {
1314                 global $wgLang;
1315
1316                 $a = split( "ISBN ", " $text" );
1317                 if ( count ( $a ) < 2 ) return $text;
1318                 $text = substr( array_shift( $a ), 1);
1319         $valid = "0123456789-ABCDEFGHIJKLMNOPQRSTUVWXYZ";
1320
1321                 foreach ( $a as $x ) {
1322                         $isbn = $blank = "" ;
1323                         while ( " " == $x{0} ) {
1324                 $blank .= " ";
1325                 $x = substr( $x, 1 );
1326                         }
1327             while ( strstr( $valid, $x{0} ) != false ) {
1328                                 $isbn .= $x{0};
1329                                 $x = substr( $x, 1 );
1330                         }
1331             $num = str_replace( "-", "", $isbn );
1332             $num = str_replace( " ", "", $num );
1333
1334             if ( "" == $num ) {
1335                                 $text .= "ISBN $blank$x";
1336             } else {
1337                                 $text .= "<a href=\"" . wfLocalUrlE( $wgLang->specialPage(
1338                                   "Booksources"), "isbn={$num}" ) . "\" CLASS=\"internal\">ISBN $isbn</a>";
1339                                 $text .= $x;
1340                         }
1341                 }
1342         return $text;
1343         }
1344
1345         /* private */ function magicRFC( $text )
1346         {
1347                 return $text;
1348         }
1349
1350         /* private */ function headElement()
1351         {
1352                 global $wgDocType, $wgDTD, $wgUser, $wgLanguageCode, $wgOutputEncoding;
1353
1354                 $ret = "<!DOCTYPE HTML PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1355
1356                 if ( "" == $this->mHTMLtitle ) {
1357                         $this->mHTMLtitle = $this->mPagetitle;
1358                 }
1359                 $ret .= "<html lang=\"$wgLanguageCode\"><head><title>{$this->mHTMLtitle}</title>\n";
1360                 array_push( $this->mMetatags, array( "http:Content-type", "text/html; charset={$wgOutputEncoding}" ) );
1361                 foreach ( $this->mMetatags as $tag ) {
1362                         if ( 0 == strcasecmp( "http:", substr( $tag[0], 0, 5 ) ) ) {
1363                                 $a = "http-equiv";
1364                                 $tag[0] = substr( $tag[0], 5 );
1365                         } else {
1366                                 $a = "name";
1367                         }
1368                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\">\n";
1369                 }
1370                 $p = $this->mRobotpolicy;
1371                 if ( "" == $p ) { $p = "index,follow"; }
1372                 $ret .= "<meta name=\"robots\" content=\"$p\">\n";
1373
1374                 if ( count( $this->mKeywords ) > 0 ) {
1375                         $ret .= "<meta name=\"keywords\" content=\"" .
1376                           implode( ",", $this->mKeywords ) . "\">\n";
1377                 }
1378                 foreach ( $this->mLinktags as $tag ) {
1379                         $ret .= "<link ";
1380                         if ( "" != $tag[0] ) { $ret .= "rel=\"{$tag[0]}\" "; }
1381                         if ( "" != $tag[1] ) { $ret .= "rev=\"{$tag[1]}\" "; }
1382                         $ret .= "href=\"{$tag[2]}\">\n";
1383                 }
1384                 $sk = $wgUser->getSkin();
1385                 $ret .= $sk->getHeadScripts();
1386                 $ret .= $sk->getUserStyles();
1387
1388                 $ret .= "</head>\n";
1389                 return $ret;
1390         }
1391 }
1392
1393 ?>