[BACK]Return to lontexconvert.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / xml
File:  [LON-CAPA] / loncom / xml / lontexconvert.pm
Revision 1.15.2.1: download - view: text, annotated - select for diffs
Mon Mar 17 16:52:28 2003 UTC (21 years, 1 month ago) by albertel
Branches: branch_0_6
CVS tags: version_0_6_2
- backport of 1.18 (HTML entities decode)

# The LearningOnline Network with CAPA
# TeX Conversion Module
#
# $Id: lontexconvert.pm,v 1.15.2.1 2003/03/17 16:52:28 albertel 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
# 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();
      if ($ENV{'browser.unicode'}) {
	  &tth::ttmoptions('-L -u1');
      } else {
	  &tth::ttmoptions('-L -u0');
      }
  } else {
      &tth::tthinit();
      if ($ENV{'browser.unicode'}) {
	  &tth::tthoptions('-L -u1');
      } else {
	  &tth::tthoptions('-L -u0');
      }
  }
  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='[UNDISPLAYABLE]';
  eval(<<'ENDCONV');
  { 
    local $SIG{SEGV}=sub { die; };
    if ($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();
    }
  }
ENDCONV
  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 to_convert {
    my ($string) = @_;
    $string=~s/\<br\s*\/?\>/ /g;
    $string=&HTML::Entities::decode($string);
    return &converted(\$string);
}

sub msgtexconverted {
    my $message=shift;

    if ($ENV{'browser.mathml'}) {
	&tth::ttminit();
	if ($ENV{'browser.unicode'}) {
	    &tth::ttmoptions('-L -u1');
	} else {
	    &tth::ttmoptions('-L -u0');
	}
    } else {
	&tth::tthinit();
	if ($ENV{'browser.unicode'}) {
	    &tth::tthoptions('-L -u1');
	} else {
	    &tth::tthoptions('-L -u0');
	}
    }
    $message=~s/(\$\$.+?\$\$)/&to_convert($1)/ge;
    $message=~s/(\$.+?\$)/&to_convert($1)/ge;
    $message=~s/(\\\(.+?\\\))/&to_convert($1)/ge;
    $message=~s/(\\\[.+?\\\])/&to_convert($1)/ge;
    return $message.$errorstring;
}

1;
__END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>