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Annotation of loncom/xml/lontexconvert.pm, revision 1.15.2.1

1.1       harris41    1: # The LearningOnline Network with CAPA
                      2: # TeX Conversion Module
                      3: #
1.15.2.1! albertel    4: # $Id: lontexconvert.pm,v 1.15 2003/02/05 22:50:44 albertel 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
1.3       www        40: # 5/4 Gerd Kortemeyer
1.1       harris41   41: 
                     42: package Apache::lontexconvert;
                     43: 
                     44: use strict;
                     45: use tth;
                     46: use vars qw($errorstring);
                     47: use Apache::lonmsg;
1.3       www        48: use Apache::lonxml;
1.1       harris41   49: 
                     50: # ====================================================================== Header
                     51: 
                     52: sub header {
                     53:   $errorstring='';
                     54:   my $time=time;
                     55:   if ($ENV{'browser.mathml'}) {
                     56:       &tth::ttminit();
1.13      albertel   57:       if ($ENV{'browser.unicode'}) {
                     58: 	  &tth::ttmoptions('-L -u1');
                     59:       } else {
                     60: 	  &tth::ttmoptions('-L -u0');
                     61:       }
1.1       harris41   62:   } else {
                     63:       &tth::tthinit();
1.13      albertel   64:       if ($ENV{'browser.unicode'}) {
                     65: 	  &tth::tthoptions('-L -u1');
                     66:       } else {
                     67: 	  &tth::tthoptions('-L -u0');
                     68:       }
1.1       harris41   69:   }
1.3       www        70:   return &Apache::lonxml::xmlbegin().
                     71:          &Apache::lonxml::fontsettings().
                     72:          "\n<head>\n".
1.5       matthew    73:          &Apache::lonxml::registerurl(undef,'tex').
1.3       www        74: 	 "\n</head>\n";
1.1       harris41   75: }
                     76: 
                     77: # ================================================================== Conversion
                     78: 
                     79: sub converted {
1.12      www        80:   my $texstring=shift;
                     81:   my $xmlstring='[UNDISPLAYABLE]';
                     82:   eval(<<'ENDCONV');
                     83:   { 
                     84:     local $SIG{SEGV}=sub { die; };
1.1       harris41   85:     if ($ENV{'browser.mathml'}) {
                     86:       $xmlstring=&tth::ttm($$texstring);
                     87:       $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
                     88:       $xmlstring=~s/\<br\>/\<br\/\>/g;
                     89:       $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
                     90:       $errorstring.=&tth::ttmerror();
1.12      www        91:     } else {
1.1       harris41   92:       $xmlstring=&tth::tth($$texstring);
                     93:       $errorstring.=&tth::ttherror();
1.12      www        94:     }
1.1       harris41   95:   }
1.12      www        96: ENDCONV
1.1       harris41   97:   return $xmlstring;
                     98: }
                     99: 
                    100: # ====================================================================== Footer
                    101: 
                    102: sub footer {
                    103:   my $xmlstring='';
                    104:   if ($ENV{'request.state'} eq 'construct') {
                    105:       $xmlstring.='<address>'.$errorstring.'</address>';
                    106:   } else {
                    107:       &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
                    108:   }
                    109: # -------------------------------------------------------------------- End Body
1.3       www       110:   $xmlstring.=&Apache::lonxml::xmlend();
1.1       harris41  111:   return $xmlstring;
1.6       www       112: }
                    113: 
                    114: # ------------------------------------------------------------ Message display
                    115: 
1.9       albertel  116: sub to_convert {
                    117:     my ($string) = @_;
1.11      www       118:     $string=~s/\<br\s*\/?\>/ /g;
1.15.2.1! albertel  119:     $string=&HTML::Entities::decode($string);
1.9       albertel  120:     return &converted(\$string);
                    121: }
                    122: 
1.6       www       123: sub msgtexconverted {
                    124:     my $message=shift;
1.9       albertel  125: 
1.6       www       126:     if ($ENV{'browser.mathml'}) {
1.15      albertel  127: 	&tth::ttminit();
                    128: 	if ($ENV{'browser.unicode'}) {
                    129: 	    &tth::ttmoptions('-L -u1');
                    130: 	} else {
                    131: 	    &tth::ttmoptions('-L -u0');
                    132: 	}
1.6       www       133:     } else {
1.15      albertel  134: 	&tth::tthinit();
                    135: 	if ($ENV{'browser.unicode'}) {
                    136: 	    &tth::tthoptions('-L -u1');
                    137: 	} else {
                    138: 	    &tth::tthoptions('-L -u0');
                    139: 	}
1.6       www       140:     }
1.15      albertel  141:     $message=~s/(\$\$.+?\$\$)/&to_convert($1)/ge;
                    142:     $message=~s/(\$.+?\$)/&to_convert($1)/ge;
                    143:     $message=~s/(\\\(.+?\\\))/&to_convert($1)/ge;
                    144:     $message=~s/(\\\[.+?\\\])/&to_convert($1)/ge;
1.8       albertel  145:     return $message.$errorstring;
1.1       harris41  146: }
                    147: 
                    148: 1;
                    149: __END__
                    150: 
                    151: 
                    152: 
                    153: 
                    154: 
                    155: 
                    156: