texvc.phtml

   1 <?
   2 global $IP;
   3 include( "./LocalSettings.php" );
   4 include( "$IP/Setup.php" );
   5 header( "Content-type: text/xml; charset={$wgInputEncoding}" );
   6 print "<";
   7 print "?xml version=\"1.0\" encoding=\"utf-8\"?";
   8 print ">";
   9 ?>
  10 <!DOCTYPE html
  11     PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  12         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  13 <html xmlns="http://www.w3.org/1999/xhtml"><head><title>texvc</title></head><body>
  14 <?
  15 print "<form method=\"post\" action=\"{$wgServer}{$wgScriptPath}/texvc_cgi.phtml\">"
  16 ?>
  17 <textarea name='math' rows='10' cols='80'><?
  18     global $math;
  19     $math = preg_replace ("/\\\\\\\\/", '\\', $math);
  20     print $math;
  21 ?></textarea><br /><input type="submit" value="Preview" name="preview" /></form>
  22 <?
  23 function xlinkToMathImage ( $tex, $outputhash )
  24 {
  25     global $wgMathPath;
  26     return "<img src=\"".$wgMathPath."/".$outputhash.".png\" alt=\"".wfEscapeHTML($tex)."\" />";
  27 }
  28
  29 function texvc_cgi_renderMath( $tex )
  30 {
  31     global $wgMathDirectory, $wgTmpDirectory, $wgInputEncoding;
  32     $mf   = wfMsg( "math_failure" );
  33     $munk = wfMsg( "math_unknown_error" );
  34
  35     $image = "";
  36     $outhtml = "";
  37     $outtex = "";
  38
  39     $fname = "texvc_cgi_renderMath";
  40
  41     $md5 = md5($tex);
  42     $md5_sql = mysql_escape_string(pack("H32", $md5));
  43     $sql = "SELECT math_outputhash,math_html_conservativeness,math_html,math_mathml FROM math WHERE math_inputhash = '".$md5_sql."'";
  44
  45     $res = wfQuery( $sql, $fname );
  46     if ( wfNumRows( $res ) == 0 )
  47     {
  48         $cmd = "./math/texvc ".escapeshellarg($wgTmpDirectory)." ".
  49                       escapeshellarg($wgMathDirectory)." ".escapeshellarg($tex)." ".escapeshellarg($wgInputEncoding);
  50         $contents = `$cmd`;
  51
  52         if (strlen($contents) == 0)
  53             return "<h3>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</h3>";
  54         $retval = substr ($contents, 0, 1);
  55
  56         if (($retval == "C") || ($retval == "M") || ($retval == "L")) {
  57             if ($retval == "C")
  58                 $conservativeness = 2;
  59             else if ($retval == "M")
  60                 $conservativeness = 1;
  61             else
  62                 $conservativeness = 0;
  63             $outdata = substr ($contents, 33);
  64
  65             $i = strpos($outdata, "\000");
  66
  67             $outhtml = substr($outdata, 0, $i);
  68             $mathml = substr($outdata, $i+1);
  69
  70             $sql_html = "'".mysql_escape_string($outhtml)."'";
  71             $sql_mathml = "'".mysql_escape_string($mathml)."'";
  72         } else if (($retval == "c") || ($retval == "m") || ($retval == "l"))  {
  73             $outhtml = substr ($contents, 33);
  74             if ($retval == "c")
  75                 $conservativeness = 2;
  76             else if ($retval == "m")
  77                 $conservativeness = 1;
  78             else
  79                 $conservativeness = 0;
  80             $sql_html = "'".mysql_escape_string($outhtml)."'";
  81             $mathml = '';
  82             $sql_mathml = 'NULL';
  83         } else if ($retval == "X") {
  84             $outhtml = '';
  85             $mathml = substr ($contents, 33);
  86             $sql_html = 'NULL';
  87             $sql_mathml = "'".mysql_escape_string($mathml)."'";
  88             $conservativeness = 0;
  89         } else if ($retval == "+") {
  90             $outhtml = '';
  91             $mathml = '';
  92             $sql_html = 'NULL';
  93             $sql_mathml = 'NULL';
  94             $conservativeness = 0;
  95         } else {
  96             if ($retval == "E")
  97                 $errmsg = wfMsg( "math_lexing_error" );
  98             else if ($retval == "S")
  99                 $errmsg = wfMsg( "math_syntax_error" );
 100             else if ($retval == "F")
 101                 $errmsg = wfMsg( "math_unknown_function" );
 102             else
 103                 $errmsg = $munk;
 104             return "<h3>".$mf." (".$errmsg.substr($contents, 1)."): ".wfEscapeHTML($tex)."</h3>";
 105         }
 106
 107         $outmd5 = substr ($contents, 1, 32);
 108         if (!preg_match("/^[a-f0-9]{32}$/", $outmd5))
 109             return "<h3>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</h3>";
 110
 111         $outmd5_sql = mysql_escape_string(pack("H32", $outmd5));
 112
 113         $sql = "INSERT INTO math VALUES ('".$md5_sql."', '".$outmd5_sql."', ".$conservativeness.", ".$sql_html.", ".$sql_mathml.")";
 114
 115         $res = wfQuery( $sql, $fname );
 116 // we don't really care if it fails
 117     } else {
 118         $rpage = wfFetchObject ( $res );
 119         $outmd5 = unpack ("H32md5", $rpage->math_outputhash);
 120         $outmd5 = $outmd5 ['md5'];
 121         $outhtml = $rpage->math_html;
 122         $conservativeness = $rpage->math_html_conservativeness;
 123         $mathml = $rpage->math_mathml;
 124     }
 125     if ($mathml == '')
 126         $mathml = "<h3>Failed to generate MathML</h3>";
 127     else
 128         $mathml = "<h3>MathML</h3><math xmlns=\"http://www.w3.org/1998/Math/MathML\">$mathml</math>";
 129     $image = "<h3>Image</h3>" . xlinkToMathImage ( $tex, $outmd5 );
 130     $cmd = "./math/texvc_tex ".escapeshellarg($tex)." ".escapeshellarg($wgInputEncoding);
 131     $outtex = `$cmd`;
 132
 133     if ( $outhtml == '' )
 134         $outhtml = "<h3>Failed to generate HTML</h3>";
 135     else
 136         if ( $conservativeness == 2)
 137             $outhtml = "<h3>HTML (conservative)</h3>" . $outhtml;
 138         else if ( $conservativeness == 1)
 139             $outhtml = "<h3>HTML (moderate)</h3>" . $outhtml;
 140         else
 141             $outhtml = "<h3>HTML (liberal)</h3>" . $outhtml;
 142
 143     if ( $outtex == '' )
 144         $outtex = "<h3>Failed to generate TeX</h3>";
 145     else
 146         $outtex = "<h3>TeX</h3>" . wfEscapeHTML($outtex);
 147
 148     return $outtex . $outhtml . $mathml . $image;
 149 }
 150
 151 global $math;
 152 if ($math != '')
 153     print texvc_cgi_renderMath($math);
 154 ?>
 155 </body></html>