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Diff for /loncom/xml/lontexconvert.pm between versions 1.1 and 1.42

version 1.1, 2001/05/03 21:28:53 version 1.42, 2005/02/09 15:45:19
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 # The LearningOnline Network with CAPA  # The LearningOnline Network with CAPA
 # TeX Conversion Module  # TeX Conversion Module
 #  #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
   # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
   # binary executable programs or libraries distributed by the 
   # Michigan State University (the "Licensee"), but any binaries so 
   # distributed are hereby licensed only for use in the context
   # of a program or computational system for which the Licensee is the 
   # primary author or distributor, and which performs substantial 
   # additional tasks beyond the translation of (La)TeX into HTML.
   # The C source of the Code may not be distributed by the Licensee
   # to any other parties under any circumstances.
   #
 # 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer  # 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer
 # 05/03/2001 Scott Harrison  # 5/4 Gerd Kortemeyer
   
 package Apache::lontexconvert;  package Apache::lontexconvert;
   
 use strict;  use strict;
 use tth;  use tth();
 use vars qw($errorstring);  use vars qw($errorstring);
 use Apache::lonmsg;  use Apache();
   use Apache::lonmsg();
   use Apache::lonxml();
   use Apache::lonmenu();
   use Apache::lonlocal;
   
 # ====================================================================== Header  # ====================================================================== Header
   
   sub init_tth {
       my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'};
       if ($ENV{'browser.mathml'}) {
    &tth::ttminit();
    if ($ENV{'browser.unicode'}) {
       &tth::ttmoptions('-L -u1 '.$options);
    } else {
       &tth::ttmoptions('-L -u0 '.$options);
    }
       } else {
    &tth::tthinit();
    if ($ENV{'browser.unicode'}) {
       &tth::tthoptions('-L -u1 '.$options);
    } else {
       &tth::tthoptions('-L -u0 '.$options);
    }
       }
   }
   
 sub header {  sub header {
   $errorstring='';      $errorstring='';
   my $time=time;      my $time=time;
   my $addhead=<<END;      &init_tth();
 <script language="JavaScript">      return &Apache::lonxml::xmlbegin().
     if (window.location.pathname!="/res/adm/pages/menu.html") {   "\n<head>\n".
  menu=window.open("","LONCAPAmenu");   &Apache::lonxml::fontsettings().
  menu.currentURL=window.location.href;   &Apache::lonmenu::registerurl(undef,'tex').
     }   "\n</head>\n";
 </script>  
 END  
   if ($ENV{'browser.mathml'}) {  
       &tth::ttminit();  
       return '<?xml version="1.0"?>'  
             .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'  
             .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '  
             .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'  
             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '   
             .'xmlns="http://www.w3.org/TR/REC-html40">'  
     ."<head>$addhead</head>"  
             ."\n";  
   } else {  
       &tth::tthinit();  
       my $headerstring='<html>';  
       if ($ENV{'browser.os'} eq 'mac') {   
          $headerstring.="<head>\n"  
              .'<meta Content-Type="text/html; charset=x-mac-roman">'  
      ."\n$addhead</head>\n";  
       }  
       else {  
   $headerstring.="<head>$addhead</head>";  
       }  
       return $headerstring."\n";  
   }  
 }  }
   
 # ================================================================== Conversion  # ================================================================== Conversion
   
   $Apache::lontexconvert::messedup=0;
   
   # we need this routine because &converted can get called from inside
   # of the safespace (through &xmlparse('<m>stuff</m>') which doesn't
   # allow the opcode for alarm, so we need to compile this before we get
   # into the safe space since opcode checks only occur at compile time
   sub convert_real {
       my ($texstring)=@_;
       my ($xmlstring,$errorstring);
       local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; };
       local $SIG{ALRM}=sub { 
    &Apache::lonnet::logthis("ALRM");
    $xmlstring='['.&mt("TeX unconverted due to errors").']';
    $Apache::lontexconvert::messedup=1;
    die &mt("TeX unconverted due to errors");
       };
       alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
       if ($ENV{'browser.mathml'}) {
    $xmlstring=&tth::ttm($$texstring);
    $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
    $xmlstring=~s/\<br\>/\<br\/\>/g;
    $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
    $errorstring.=&tth::ttmerror();
       } else {
    $xmlstring=&tth::tth($$texstring);
    $errorstring.=&tth::ttherror();
    $xmlstring=~s-</font(\s*)>-</font>-g;
       }
       $xmlstring=~s/\s*\<br clear\=\"all\"/\<br/s;
       $xmlstring=~s/^\s*//;
       $xmlstring=~s/\s*$//;
       alarm(0);
       return ($xmlstring,$errorstring);
   }
   
 sub converted {  sub converted {
     my $texstring=shift;      my $texstring=shift;
     my $xmlstring;      my $xmlstring='['.&mt('UNDISPLAYABLE').']';
     if ($ENV{'browser.mathml'}) {      if ($Apache::lontexconvert::messedup) {
       $xmlstring=&tth::ttm($$texstring);   return '['.&mt('TeX unconverted due to previous errors').']';
       $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;      }
       $xmlstring=~s/\<br\>/\<br\/\>/g;      eval(<<'ENDCONV');
       $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;      ($xmlstring,$errorstring)=&convert_real($texstring)
       $errorstring.=&tth::ttmerror();  ENDCONV
   } else {      if ($@) {
       $xmlstring=&tth::tth($$texstring);   $errorstring.=&mt("Evaluation Error: ").$@;
       $errorstring.=&tth::ttherror();   $Apache::lontexconvert::messedup=1;
   }      }
   return $xmlstring;      if ($Apache::lontexconvert::messedup || &tth::tthmessedup() || 
    $errorstring) {
    &Apache::lonnet::logthis("Trying to kill myself");
    $Apache::lontexconvert::messedup=1;
    my $request=Apache->request();
    $request->child_terminate();
       }
       return $xmlstring;
 }  }
   
 # ====================================================================== Footer  # ====================================================================== Footer
Line 77  sub footer { Line 152  sub footer {
       &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);        &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
   }    }
 # -------------------------------------------------------------------- End Body  # -------------------------------------------------------------------- End Body
   $xmlstring.='</html>';    $xmlstring.=&Apache::lonxml::xmlend();
   return $xmlstring;    return $xmlstring;
 }  }
   
   # ------------------------------------------------------------ Message display
   
   sub to_convert {
       my ($string) = @_;
       $string=~s/\<br\s*\/?\>/ /gs;
   #    $string=~s/\s/ /gs;
       $string=&HTML::Entities::decode($string);
       return &converted(\$string);
   }
   
   sub smiley {
       my $expression=shift;
       if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; }
       my %smileys=('\:\-\)' => 'smiley',
    '8\-\)'  => 'coolsmile',
    '8\-(I|\|)'   => 'coolindiff',
    ':\-(I|\|)'   => 'neutral',
    '\:\-(o|O|\(\))' => 'shocked',
    ':\-\('  => 'frowny',
    '\;\-\)' => 'wink',
    '\:\-P'  => 'baeh',
    '\:\-(\\\|\\/)' => 'hrrm',
    '\:\-D'  => 'bigsmile',
    '\:\-C'  => 'angry',
    '\:(\'|\`)\-\(' => 'cry',
    '\:\-(X|\#)' => 'lipsrsealed',
    '\:\-S' => 'huh');
       my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
       foreach (keys %smileys) {
    $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs; 
       }
       return $expression;
   }
   
   sub msgtexconverted {
       my ($message,$email) = @_;
       $errorstring='';
       &init_tth();
       my $outmessage='';
       my $tex=0;
       foreach (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {
    if ($tex) {
       if ($email) {
    $outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0;
       } else {
    $outmessage.=&to_convert($_); $tex=0;
       }
    } else {
               $outmessage.=&smiley($_); $tex=1;
    }
       }
       if (wantarray) {
    return ($outmessage,$errorstring);
       } else {
    return $outmessage.$errorstring;
       }
   }
   
 1;  1;
 __END__  __END__
   
Removed from v.1.1  
changed lines
  Added in v.1.42

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