texvc.phtml

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