Annotation of loncom/xml/lontexconvert.pm, revision 1.35

1.1       harris41    1: # The LearningOnline Network with CAPA
                      2: # TeX Conversion Module
                      3: #
1.35    ! albertel    4: # $Id: lontexconvert.pm,v 1.34 2004/03/09 15:09:14 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;
1.33      albertel   45: use tth();
1.1       harris41   46: use vars qw($errorstring);
1.19      albertel   47: use Apache();
1.33      albertel   48: use Apache::lonmsg();
                     49: use Apache::lonxml();
                     50: use Apache::lonmenu();
                     51: use Apache::lonlocal;
1.1       harris41   52: 
                     53: # ====================================================================== Header
                     54: 
1.29      albertel   55: sub init_tth {
                     56:     my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'};
                     57:     if ($ENV{'browser.mathml'}) {
                     58: 	&tth::ttminit();
                     59: 	if ($ENV{'browser.unicode'}) {
                     60: 	    &tth::ttmoptions('-L -u1 '.$options);
                     61: 	} else {
                     62: 	    &tth::ttmoptions('-L -u0 '.$options);
                     63: 	}
                     64:     } else {
                     65: 	&tth::tthinit();
                     66: 	if ($ENV{'browser.unicode'}) {
                     67: 	    &tth::tthoptions('-L -u1 '.$options);
                     68: 	} else {
                     69: 	    &tth::tthoptions('-L -u0 '.$options);
                     70: 	}
                     71:     }
                     72: }
                     73: 
1.1       harris41   74: sub header {
1.31      albertel   75:     $errorstring='';
                     76:     my $time=time;
                     77:     &init_tth();
                     78:     return &Apache::lonxml::xmlbegin().
                     79: 	&Apache::lonxml::fontsettings().
                     80: 	"\n<head>\n".
                     81: 	&Apache::lonmenu::registerurl(undef,'tex').
                     82: 	"\n</head>\n";
1.1       harris41   83: }
                     84: 
                     85: # ================================================================== Conversion
                     86: 
1.19      albertel   87: $Apache::lontexconvert::messedup=0;
1.1       harris41   88: sub converted {
1.31      albertel   89:     my $texstring=shift;
1.34      www        90:     my $xmlstring='['.&mt('UNDISPLAYABLE').']';
1.31      albertel   91:     if ($Apache::lontexconvert::messedup) {
1.35    ! albertel   92: 	return '['.&mt('TeX unconverted due to previous errors').']';
1.31      albertel   93:     }
                     94:     eval(<<'ENDCONV');
                     95:     {
                     96: 	local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; };
1.35    ! albertel   97: 	local $SIG{ALRM}=sub { 
        !            98: 	    $xmlstring='['.&mt("TeX unconverted due to errors").']';
        !            99: 	    $Apache::lontexconvert::messedup=1;
        !           100: 	    die &mt("TeX unconverted due to errors"); };
        !           101: 	alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
1.31      albertel  102: 	if ($ENV{'browser.mathml'}) {
                    103: 	    $xmlstring=&tth::ttm($$texstring);
                    104: 	    $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
                    105: 	    $xmlstring=~s/\<br\>/\<br\/\>/g;
                    106: 	    $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
                    107: 	    $errorstring.=&tth::ttmerror();
                    108: 	} else {
                    109: 	    $xmlstring=&tth::tth($$texstring);
                    110: 	    $errorstring.=&tth::ttherror();
                    111: 	    $xmlstring=~s-</font(\s*)>-</font>-g;
                    112: 	}
                    113: 	$xmlstring=~s/^\s*//;
                    114: 	$xmlstring=~s/\s*$//;
1.35    ! albertel  115: 	alarm(0);
1.12      www       116:     }
                    117: ENDCONV
1.32      albertel  118:     if ($@) {
1.35    ! albertel  119: 	$errorstring.=&mt("Evaluation Error: ").$@;
1.32      albertel  120: 	$Apache::lontexconvert::messedup=1;
                    121:     }
1.31      albertel  122:     if ($Apache::lontexconvert::messedup || &tth::tthmessedup()) {
                    123: 	&Apache::lonnet::logthis("Trying to kill myself");
                    124: 	$Apache::lontexconvert::messedup=1;
                    125: 	my $request=Apache->request();
                    126: 	$request->child_terminate();
                    127:     }
                    128:     return $xmlstring;
1.1       harris41  129: }
                    130: 
                    131: # ====================================================================== Footer
                    132: 
                    133: sub footer {
                    134:   my $xmlstring='';
                    135:   if ($ENV{'request.state'} eq 'construct') {
                    136:       $xmlstring.='<address>'.$errorstring.'</address>';
                    137:   } else {
                    138:       &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
                    139:   }
                    140: # -------------------------------------------------------------------- End Body
1.3       www       141:   $xmlstring.=&Apache::lonxml::xmlend();
1.1       harris41  142:   return $xmlstring;
1.6       www       143: }
                    144: 
                    145: # ------------------------------------------------------------ Message display
                    146: 
1.9       albertel  147: sub to_convert {
                    148:     my ($string) = @_;
1.22      www       149:     $string=~s/\<br\s*\/?\>/ /gs;
1.30      albertel  150: #    $string=~s/\s/ /gs;
1.18      albertel  151:     $string=&HTML::Entities::decode($string);
1.9       albertel  152:     return &converted(\$string);
                    153: }
                    154: 
1.20      www       155: sub smiley {
1.31      albertel  156:     my $expression=shift;
                    157:     if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; }
                    158:     my %smileys=('\:\-\)' => 'smiley',
                    159: 		 '8\-\)'  => 'coolsmile',
                    160: 		 '8\-(I|\|)'   => 'coolindiff',
                    161: 		 ':\-(I|\|)'   => 'neutral',
                    162: 		 '\:\-(o|O|\(\))' => 'shocked',
                    163: 		 ':\-\('  => 'frowny',
                    164: 		 '\;\-\)' => 'wink',
                    165: 		 '\:\-P'  => 'baeh',
                    166: 		 '\:\-(\\\|\\/)' => 'hrrm',
                    167: 		 '\:\-D'  => 'bigsmile',
                    168: 		 '\:\-C'  => 'angry',
                    169: 		 '\:(\'|\`)\-\(' => 'cry',
                    170: 		 '\:\-(X|\#)' => 'lipsrsealed',
                    171: 		 '\:\-S' => 'huh');
                    172:     my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
                    173:     foreach (keys %smileys) {
                    174: 	$expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs; 
                    175:     }
                    176:     return $expression;
1.20      www       177: }
                    178: 
1.6       www       179: sub msgtexconverted {
                    180:     my $message=shift;
1.30      albertel  181:     my $email=shift;
1.17      albertel  182:     $errorstring='';
1.29      albertel  183:     &init_tth();
1.25      www       184:     my $outmessage='';
                    185:     my $tex=0;
                    186:     foreach (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {
                    187: 	if ($tex) {
1.30      albertel  188: 	    if ($email) {
                    189: 		$outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0;
                    190: 	    } else {
                    191: 		$outmessage.=&to_convert($_); $tex=0;
                    192: 	    }
1.25      www       193: 	} else {
                    194:             $outmessage.=&smiley($_); $tex=1;
                    195: 	}
                    196:     }
1.24      albertel  197:     if (wantarray) {
1.25      www       198: 	return ($outmessage,$errorstring);
1.24      albertel  199:     } else {
1.25      www       200: 	return $outmessage.$errorstring;
1.24      albertel  201:     }
1.1       harris41  202: }
                    203: 
                    204: 1;
                    205: __END__
                    206: 
                    207: 
                    208: 
                    209: 
                    210: 
                    211: 
                    212: 

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