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File:  [LON-CAPA] / loncom / xml / lontexconvert.pm
Revision 1.13: download - view: text, annotated - select for diffs
Sat Nov 9 22:05:33 2002 UTC (21 years, 6 months ago) by albertel
Branches: MAIN
CVS tags: version_0_6, HEAD
- have the tth init code set the unicode encoding
- new ENV parm needed browser.unicode

    1: # The LearningOnline Network with CAPA
    2: # TeX Conversion Module
    3: #
    4: # $Id: lontexconvert.pm,v 1.13 2002/11/09 22:05:33 albertel Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: # Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
   29: # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
   30: # binary executable programs or libraries distributed by the 
   31: # Michigan State University (the "Licensee"), but any binaries so 
   32: # distributed are hereby licensed only for use in the context
   33: # of a program or computational system for which the Licensee is the 
   34: # primary author or distributor, and which performs substantial 
   35: # additional tasks beyond the translation of (La)TeX into HTML.
   36: # The C source of the Code may not be distributed by the Licensee
   37: # to any other parties under any circumstances.
   38: #
   39: # 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer
   40: # 05/03/2001 Scott Harrison
   41: # 5/4 Gerd Kortemeyer
   42: 
   43: package Apache::lontexconvert;
   44: 
   45: use strict;
   46: use tth;
   47: use vars qw($errorstring);
   48: use Apache::lonmsg;
   49: use Apache::lonxml;
   50: 
   51: # ====================================================================== Header
   52: 
   53: sub header {
   54:   $errorstring='';
   55:   my $time=time;
   56:   if ($ENV{'browser.mathml'}) {
   57:       &tth::ttminit();
   58:       if ($ENV{'browser.unicode'}) {
   59: 	  &tth::ttmoptions('-L -u1');
   60:       } else {
   61: 	  &tth::ttmoptions('-L -u0');
   62:       }
   63:   } else {
   64:       &tth::tthinit();
   65:       if ($ENV{'browser.unicode'}) {
   66: 	  &tth::tthoptions('-L -u1');
   67:       } else {
   68: 	  &tth::tthoptions('-L -u0');
   69:       }
   70:   }
   71:   return &Apache::lonxml::xmlbegin().
   72:          &Apache::lonxml::fontsettings().
   73:          "\n<head>\n".
   74:          &Apache::lonxml::registerurl(undef,'tex').
   75: 	 "\n</head>\n";
   76: }
   77: 
   78: # ================================================================== Conversion
   79: 
   80: sub converted {
   81:   my $texstring=shift;
   82:   my $xmlstring='[UNDISPLAYABLE]';
   83:   eval(<<'ENDCONV');
   84:   { 
   85:     local $SIG{SEGV}=sub { die; };
   86:     if ($ENV{'browser.mathml'}) {
   87:       $xmlstring=&tth::ttm($$texstring);
   88:       $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
   89:       $xmlstring=~s/\<br\>/\<br\/\>/g;
   90:       $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
   91:       $errorstring.=&tth::ttmerror();
   92:     } else {
   93:       $xmlstring=&tth::tth($$texstring);
   94:       $errorstring.=&tth::ttherror();
   95:     }
   96:   }
   97: ENDCONV
   98:   return $xmlstring;
   99: }
  100: 
  101: # ====================================================================== Footer
  102: 
  103: sub footer {
  104:   my $xmlstring='';
  105:   if ($ENV{'request.state'} eq 'construct') {
  106:       $xmlstring.='<address>'.$errorstring.'</address>';
  107:   } else {
  108:       &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
  109:   }
  110: # -------------------------------------------------------------------- End Body
  111:   $xmlstring.=&Apache::lonxml::xmlend();
  112:   return $xmlstring;
  113: }
  114: 
  115: # ------------------------------------------------------------ Message display
  116: 
  117: sub to_convert {
  118:     my ($string) = @_;
  119:     $string=~s/\<br\s*\/?\>/ /g;
  120:     return &converted(\$string);
  121: }
  122: 
  123: sub msgtexconverted {
  124:     my $message=shift;
  125: 
  126:     #FIXME this crap needs to go but right now the -L option might be
  127:     #ignored if this isn;t the first time the tth engine is used
  128:     #thus the \\document class crap, it makes sure we init the LaTeX stuff
  129:     if ($ENV{'browser.mathml'}) {
  130:       &tth::ttminit();
  131:       &tth::ttmoptions("-L");
  132:     } else {
  133:       &tth::tthinit();
  134:       &tth::tthoptions("-L");
  135:     }
  136:     $message=~s/(\$\$.+?\$\$)/&to_convert("\\documentclass{article}".$1)/ge;
  137:     $message=~s/(\$.+?\$)/&to_convert("\\documentclass{article}".$1)/ge;
  138:     $message=~s/(\\\(.+?\\\))/&to_convert("\\documentclass{article}".$1)/ge;
  139:     $message=~s/(\\\[.+?\\\])/&to_convert("\\documentclass{article}".$1)/ge;
  140:     return $message.$errorstring;
  141: }
  142: 
  143: 1;
  144: __END__
  145: 
  146: 
  147: 
  148: 
  149: 
  150: 
  151:
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