Annotation of loncom/xml/lontexconvert.pm, revision 1.26

1.1       harris41    1: # The LearningOnline Network with CAPA
                      2: # TeX Conversion Module
                      3: #
1.26    ! www         4: # $Id: lontexconvert.pm,v 1.25 2003/09/19 16:12:50 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
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);
1.19      albertel   47: use Apache();
1.1       harris41   48: use Apache::lonmsg;
1.3       www        49: use Apache::lonxml;
1.16      www        50: use Apache::lonmenu;
1.1       harris41   51: 
                     52: # ====================================================================== Header
                     53: 
                     54: sub header {
                     55:   $errorstring='';
                     56:   my $time=time;
                     57:   if ($ENV{'browser.mathml'}) {
                     58:       &tth::ttminit();
1.13      albertel   59:       if ($ENV{'browser.unicode'}) {
                     60: 	  &tth::ttmoptions('-L -u1');
                     61:       } else {
                     62: 	  &tth::ttmoptions('-L -u0');
                     63:       }
1.1       harris41   64:   } else {
                     65:       &tth::tthinit();
1.13      albertel   66:       if ($ENV{'browser.unicode'}) {
                     67: 	  &tth::tthoptions('-L -u1');
                     68:       } else {
                     69: 	  &tth::tthoptions('-L -u0');
                     70:       }
1.1       harris41   71:   }
1.3       www        72:   return &Apache::lonxml::xmlbegin().
                     73:          &Apache::lonxml::fontsettings().
                     74:          "\n<head>\n".
1.16      www        75:          &Apache::lonmenu::registerurl(undef,'tex').
1.3       www        76: 	 "\n</head>\n";
1.1       harris41   77: }
                     78: 
                     79: # ================================================================== Conversion
                     80: 
1.19      albertel   81: $Apache::lontexconvert::messedup=0;
1.1       harris41   82: sub converted {
1.12      www        83:   my $texstring=shift;
                     84:   my $xmlstring='[UNDISPLAYABLE]';
1.19      albertel   85:   if ($Apache::lontexconvert::messedup) {
1.26    ! www        86:       return '[TeX Unconverted Due To Previous Errors]';
1.19      albertel   87:   }
1.12      www        88:   eval(<<'ENDCONV');
1.19      albertel   89:   {
                     90:     local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; };
1.1       harris41   91:     if ($ENV{'browser.mathml'}) {
                     92:       $xmlstring=&tth::ttm($$texstring);
                     93:       $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
                     94:       $xmlstring=~s/\<br\>/\<br\/\>/g;
                     95:       $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
                     96:       $errorstring.=&tth::ttmerror();
1.12      www        97:     } else {
1.1       harris41   98:       $xmlstring=&tth::tth($$texstring);
                     99:       $errorstring.=&tth::ttherror();
1.12      www       100:     }
1.23      albertel  101:     $xmlstring=~s/^\s*//;
                    102:     $xmlstring=~s/\s*$//;
1.1       harris41  103:   }
1.12      www       104: ENDCONV
1.19      albertel  105:   if ($Apache::lontexconvert::messedup || &tth::tthmessedup()) {
                    106:       &Apache::lonnet::logthis("Trying to kill myself");
                    107:       $Apache::lontexconvert::messedup=1;
                    108:       my $request=Apache->request();
                    109:       $request->child_terminate();
                    110:   }
1.1       harris41  111:   return $xmlstring;
                    112: }
                    113: 
                    114: # ====================================================================== Footer
                    115: 
                    116: sub footer {
                    117:   my $xmlstring='';
                    118:   if ($ENV{'request.state'} eq 'construct') {
                    119:       $xmlstring.='<address>'.$errorstring.'</address>';
                    120:   } else {
                    121:       &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
                    122:   }
                    123: # -------------------------------------------------------------------- End Body
1.3       www       124:   $xmlstring.=&Apache::lonxml::xmlend();
1.1       harris41  125:   return $xmlstring;
1.6       www       126: }
                    127: 
                    128: # ------------------------------------------------------------ Message display
                    129: 
1.9       albertel  130: sub to_convert {
                    131:     my ($string) = @_;
1.22      www       132:     $string=~s/\<br\s*\/?\>/ /gs;
                    133:     $string=~s/\s/ /gs;
1.18      albertel  134:     $string=&HTML::Entities::decode($string);
1.9       albertel  135:     return &converted(\$string);
                    136: }
                    137: 
1.20      www       138: sub smiley {
                    139:    my $expression=shift;
                    140:    if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; }
                    141:    my %smileys=('\:\-*\)' => 'smiley',
                    142:                 '8\-*\)'  => 'coolsmile',
                    143:                 '8\-*I'   => 'coolindiff',
                    144:                 ':\-*\('  => 'frowny',
                    145:                 '\:\-*(o|O|\(\))' => 'shocked',
                    146:                 '\;\-*\)' => 'wink',
                    147:                 '\:\-*P'  => 'baeh',
1.21      www       148:                 '\:\-(\\\|\\/)' => 'hrrm',
1.20      www       149:                 '\:\-*D'  => 'bigsmile',
                    150:                 '\:\-*C'  => 'angry',
                    151:                 '\:(\'|\`)\-*\(' => 'cry',
                    152:                 '\:\-*(X|\#)' => 'lipsrsealed',
                    153:                 '\:\-*S' => 'huh');
                    154:    my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
                    155:    foreach (keys %smileys) {
                    156:       $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs; 
                    157:    }
                    158:    return $expression;
                    159: }
                    160: 
1.6       www       161: sub msgtexconverted {
                    162:     my $message=shift;
1.9       albertel  163: 
1.17      albertel  164:     $errorstring='';
1.6       www       165:     if ($ENV{'browser.mathml'}) {
1.15      albertel  166: 	&tth::ttminit();
                    167: 	if ($ENV{'browser.unicode'}) {
                    168: 	    &tth::ttmoptions('-L -u1');
                    169: 	} else {
                    170: 	    &tth::ttmoptions('-L -u0');
                    171: 	}
1.6       www       172:     } else {
1.15      albertel  173: 	&tth::tthinit();
                    174: 	if ($ENV{'browser.unicode'}) {
                    175: 	    &tth::tthoptions('-L -u1');
                    176: 	} else {
                    177: 	    &tth::tthoptions('-L -u0');
                    178: 	}
1.6       www       179:     }
1.25      www       180:     my $outmessage='';
                    181:     my $tex=0;
                    182:     foreach (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {
                    183: 	if ($tex) {
                    184: 	    $outmessage.=&to_convert($_); $tex=0;
                    185: 	} else {
                    186:             $outmessage.=&smiley($_); $tex=1;
                    187: 	}
                    188:     }
1.24      albertel  189:     if (wantarray) {
1.25      www       190: 	return ($outmessage,$errorstring);
1.24      albertel  191:     } else {
1.25      www       192: 	return $outmessage.$errorstring;
1.24      albertel  193:     }
1.1       harris41  194: }
                    195: 
                    196: 1;
                    197: __END__
                    198: 
                    199: 
                    200: 
                    201: 
                    202: 
                    203: 
                    204: 

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