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Annotation of loncom/xml/lontexconvert.pm, revision 1.13

1.1       harris41    1: # The LearningOnline Network with CAPA
                      2: # TeX Conversion Module
                      3: #
1.13    ! albertel    4: # $Id: lontexconvert.pm,v 1.12 2002/10/28 20:40:25 www Exp $
1.4       www         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: #
1.1       harris41   39: # 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer
                     40: # 05/03/2001 Scott Harrison
1.3       www        41: # 5/4 Gerd Kortemeyer
1.1       harris41   42: 
                     43: package Apache::lontexconvert;
                     44: 
                     45: use strict;
                     46: use tth;
                     47: use vars qw($errorstring);
                     48: use Apache::lonmsg;
1.3       www        49: use Apache::lonxml;
1.1       harris41   50: 
                     51: # ====================================================================== Header
                     52: 
                     53: sub header {
                     54:   $errorstring='';
                     55:   my $time=time;
                     56:   if ($ENV{'browser.mathml'}) {
                     57:       &tth::ttminit();
1.13    ! albertel   58:       if ($ENV{'browser.unicode'}) {
        !            59: 	  &tth::ttmoptions('-L -u1');
        !            60:       } else {
        !            61: 	  &tth::ttmoptions('-L -u0');
        !            62:       }
1.1       harris41   63:   } else {
                     64:       &tth::tthinit();
1.13    ! albertel   65:       if ($ENV{'browser.unicode'}) {
        !            66: 	  &tth::tthoptions('-L -u1');
        !            67:       } else {
        !            68: 	  &tth::tthoptions('-L -u0');
        !            69:       }
1.1       harris41   70:   }
1.3       www        71:   return &Apache::lonxml::xmlbegin().
                     72:          &Apache::lonxml::fontsettings().
                     73:          "\n<head>\n".
1.5       matthew    74:          &Apache::lonxml::registerurl(undef,'tex').
1.3       www        75: 	 "\n</head>\n";
1.1       harris41   76: }
                     77: 
                     78: # ================================================================== Conversion
                     79: 
                     80: sub converted {
1.12      www        81:   my $texstring=shift;
                     82:   my $xmlstring='[UNDISPLAYABLE]';
                     83:   eval(<<'ENDCONV');
                     84:   { 
                     85:     local $SIG{SEGV}=sub { die; };
1.1       harris41   86:     if ($ENV{'browser.mathml'}) {
                     87:       $xmlstring=&tth::ttm($$texstring);
                     88:       $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
                     89:       $xmlstring=~s/\<br\>/\<br\/\>/g;
                     90:       $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
                     91:       $errorstring.=&tth::ttmerror();
1.12      www        92:     } else {
1.1       harris41   93:       $xmlstring=&tth::tth($$texstring);
                     94:       $errorstring.=&tth::ttherror();
1.12      www        95:     }
1.1       harris41   96:   }
1.12      www        97: ENDCONV
1.1       harris41   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
1.3       www       111:   $xmlstring.=&Apache::lonxml::xmlend();
1.1       harris41  112:   return $xmlstring;
1.6       www       113: }
                    114: 
                    115: # ------------------------------------------------------------ Message display
                    116: 
1.9       albertel  117: sub to_convert {
                    118:     my ($string) = @_;
1.11      www       119:     $string=~s/\<br\s*\/?\>/ /g;
1.9       albertel  120:     return &converted(\$string);
                    121: }
                    122: 
1.6       www       123: sub msgtexconverted {
                    124:     my $message=shift;
1.9       albertel  125: 
                    126:     #FIXME this crap needs to go but right now the -L option might be
                    127:     #ignored if this isn;t the first time the tth engine is used
                    128:     #thus the \\document class crap, it makes sure we init the LaTeX stuff
1.6       www       129:     if ($ENV{'browser.mathml'}) {
                    130:       &tth::ttminit();
1.7       www       131:       &tth::ttmoptions("-L");
1.6       www       132:     } else {
                    133:       &tth::tthinit();
1.7       www       134:       &tth::tthoptions("-L");
1.6       www       135:     }
1.9       albertel  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;
1.8       albertel  140:     return $message.$errorstring;
1.1       harris41  141: }
                    142: 
                    143: 1;
                    144: __END__
                    145: 
                    146: 
                    147: 
                    148: 
                    149: 
                    150: 
                    151: