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'><?php
  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         $dbr =& wfGetDB( DB_SLAVE );
  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 = pack("H32", $md5);
  43
  44         $mathTable = $dbr->tableName( 'math' );
  45         $rpage = $dbr->getArray( 'math', array('math_outputhash','math_html_conservativeness','math_html','math_mathml'),
  46           array( 'math_inputhash' => $md5_sql ) );
  47
  48         if ( $rpage === false )
  49         {
  50                 $cmd = "./math/texvc ".wfEscapeShellArg($wgTmpDirectory)." ".
  51                                           wfEscapeShellArg($wgMathDirectory)." ".wfEscapeShellArg($tex)." ".wfEscapeShellArg($wgInputEncoding);
  52                 $contents = `$cmd`;
  53
  54                 if (strlen($contents) == 0)
  55                         return "<h3>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</h3>";
  56                 $retval = substr ($contents, 0, 1);
  57
  58                 if (($retval == "C") || ($retval == "M") || ($retval == "L")) {
  59                         if ($retval == "C")
  60                                 $conservativeness = 2;
  61                         else if ($retval == "M")
  62                                 $conservativeness = 1;
  63                         else
  64                                 $conservativeness = 0;
  65                         $outdata = substr ($contents, 33);
  66
  67                         $i = strpos($outdata, "\000");
  68
  69                         $outhtml = substr($outdata, 0, $i);
  70                         $mathml = substr($outdata, $i+1);
  71
  72                         #$sql_html = "'".mysql_escape_string($outhtml)."'";
  73                         #$sql_mathml = "'".mysql_escape_string($mathml)."'";
  74                 } else if (($retval == "c") || ($retval == "m") || ($retval == "l"))  {
  75                         $outhtml = substr ($contents, 33);
  76                         if ($retval == "c")
  77                                 $conservativeness = 2;
  78                         else if ($retval == "m")
  79                                 $conservativeness = 1;
  80                         else
  81                                 $conservativeness = 0;
  82                         #$sql_html = "'".mysql_escape_string($outhtml)."'";
  83                         $mathml = NULL;
  84                         #$sql_mathml = 'NULL';
  85                 } else if ($retval == "X") {
  86                         $outhtml = NULL;
  87                         $mathml = substr ($contents, 33);
  88                         #$sql_html = 'NULL';
  89                         #$sql_mathml = "'".mysql_escape_string($mathml)."'";
  90                         $conservativeness = 0;
  91                 } else if ($retval == "+") {
  92                         $outhtml = NULL;
  93                         $mathml = NULL;
  94                         #$sql_html = 'NULL';
  95                         #$sql_mathml = 'NULL';
  96                         $conservativeness = 0;
  97                 } else {
  98                         if ($retval == "E")
  99                                 $errmsg = wfMsg( "math_lexing_error" );
 100                         else if ($retval == "S")
 101                                 $errmsg = wfMsg( "math_syntax_error" );
 102                         else if ($retval == "F")
 103                                 $errmsg = wfMsg( "math_unknown_function" );
 104                         else
 105                                 $errmsg = $munk;
 106                         return "<h3>".$mf." (".$errmsg.substr($contents, 1)."): ".wfEscapeHTML($tex)."</h3>";
 107                 }
 108
 109                 $outmd5 = substr ($contents, 1, 32);
 110                 if (!preg_match("/^[a-f0-9]{32}$/", $outmd5))
 111                         return "<h3>".$mf." (".$munk."): ".wfEscapeHTML($tex)."</h3>";
 112
 113                 $outmd5_sql = pack("H32", $outmd5);
 114
 115                 # Someone may have inserted the same hash since the SELECT, but that's no big deal, just ignore errors
 116                 $dbw =& wfGetDB( DB_MASTER );
 117                 $dbw->insertArray( 'math',
 118                   array(
 119                     'math_inputhash' => $md5_sql,
 120                         'math_outputhash' => $outmd5_sql,
 121                         'math_html_conservativeness' => $conservativeness,
 122                         'math_html' => $outhtml,
 123                         'math_mathml' => $mathml,
 124                   ), $fname, array( 'IGNORE' )
 125                 );
 126
 127 // we don't really care if it fails
 128         } else {
 129                 $rpage = $dbr->fetchObject ( $res );
 130                 $outmd5 = unpack ("H32md5", $rpage->math_outputhash);
 131                 $outmd5 = $outmd5 ['md5'];
 132                 $outhtml = $rpage->math_html;
 133                 $conservativeness = $rpage->math_html_conservativeness;
 134                 $mathml = $rpage->math_mathml;
 135         }
 136         if ( is_null( $mathml ) || $mathml === '' )
 137                 $mathml = "<h3>Failed to generate MathML</h3>";
 138         else
 139                 $mathml = "<h3>MathML</h3><math xmlns=\"http://www.w3.org/1998/Math/MathML\">$mathml</math>";
 140         $image = "<h3>Image</h3>" . xlinkToMathImage ( $tex, $outmd5 );
 141         $cmd = "./math/texvc_tex ".escapeshellarg($tex)." ".escapeshellarg($wgInputEncoding);
 142         $outtex = `$cmd`;
 143
 144         if ( is_null( $outhtml ) || $outhtml === '' )
 145                 $outhtml = "<h3>Failed to generate HTML</h3>";
 146         else
 147                 if ( $conservativeness == 2)
 148                         $outhtml = "<h3>HTML (conservative)</h3>" . $outhtml;
 149                 else if ( $conservativeness == 1)
 150                         $outhtml = "<h3>HTML (moderate)</h3>" . $outhtml;
 151                 else
 152                         $outhtml = "<h3>HTML (liberal)</h3>" . $outhtml;
 153
 154         if ( $outtex == '' )
 155                 $outtex = "<h3>Failed to generate TeX</h3>";
 156         else
 157                 $outtex = "<h3>TeX</h3>" . wfEscapeHTML($outtex);
 158
 159         return $outtex . $outhtml . $mathml . $image;
 160 }
 161
 162 global $math;
 163 if ($math != '')
 164         print texvc_cgi_renderMath($math);
 165 ?>
 166 </body></html>