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File:  [LON-CAPA] / loncom / xml / lontexconvert.pm
Revision 1.7: download - view: text, annotated - select for diffs
Tue Jul 30 12:42:13 2002 UTC (21 years, 9 months ago) by www
Branches: MAIN
CVS tags: version_0_5_1, version_0_5, HEAD
Attempt to get it into LaTeX mode for messages (apparently not working), and
minimal matching in reg exp.

# The LearningOnline Network with CAPA
# TeX Conversion Module
#
# $Id: lontexconvert.pm,v 1.7 2002/07/30 12:42:13 www Exp $
#
# 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
# 05/03/2001 Scott Harrison
# 5/4 Gerd Kortemeyer

package Apache::lontexconvert;

use strict;
use tth;
use vars qw($errorstring);
use Apache::lonmsg;
use Apache::lonxml;

# ====================================================================== Header

sub header {
  $errorstring='';
  my $time=time;
  if ($ENV{'browser.mathml'}) {
      &tth::ttminit();
  } else {
      &tth::tthinit();
  }
  return &Apache::lonxml::xmlbegin().
         &Apache::lonxml::fontsettings().
         "\n<head>\n".
         &Apache::lonxml::registerurl(undef,'tex').
	 "\n</head>\n";
}

# ================================================================== Conversion

sub converted {
    my $texstring=shift;
    my $xmlstring;
    if ($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();
  }
  return $xmlstring;
}

# ====================================================================== Footer

sub footer {
  my $xmlstring='';
  if ($ENV{'request.state'} eq 'construct') {
      $xmlstring.='<address>'.$errorstring.'</address>';
  } else {
      &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
  }
# -------------------------------------------------------------------- End Body
  $xmlstring.=&Apache::lonxml::xmlend();
  return $xmlstring;
}

# ------------------------------------------------------------ Message display

sub msgtexconverted {
    my $message=shift;
    if ($ENV{'browser.mathml'}) {
      &tth::ttminit();
      &tth::ttmoptions("-L");
    } else {
      &tth::tthinit();
      &tth::tthoptions("-L");
    }
    $message=~s/(\$.+?\$)/&converted(\$1)/ge;
    $message=~s/(\\\[.+?\\\])/&converted(\$1)/ge;
    return $message;
}

1;
__END__
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