Annotation of loncom/xml/lontexconvert.pm, revision 1.42
1.1 harris41 1: # The LearningOnline Network with CAPA
2: # TeX Conversion Module
3: #
1.42 ! www 4: # $Id: lontexconvert.pm,v 1.41 2005/01/31 11:26:08 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().
1.40 albertel 79: "\n<head>\n".
1.31 albertel 80: &Apache::lonxml::fontsettings().
81: &Apache::lonmenu::registerurl(undef,'tex').
82: "\n</head>\n";
1.1 harris41 83: }
84:
85: # ================================================================== Conversion
86:
1.19 albertel 87: $Apache::lontexconvert::messedup=0;
1.36 albertel 88:
89: # we need this routine because &converted can get called from inside
90: # of the safespace (through &xmlparse('<m>stuff</m>') which doesn't
91: # allow the opcode for alarm, so we need to compile this before we get
92: # into the safe space since opcode checks only occur at compile time
93: sub convert_real {
94: my ($texstring)=@_;
95: my ($xmlstring,$errorstring);
96: local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; };
97: local $SIG{ALRM}=sub {
1.37 albertel 98: &Apache::lonnet::logthis("ALRM");
1.36 albertel 99: $xmlstring='['.&mt("TeX unconverted due to errors").']';
100: $Apache::lontexconvert::messedup=1;
101: die &mt("TeX unconverted due to errors");
102: };
103: alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
104: if ($ENV{'browser.mathml'}) {
105: $xmlstring=&tth::ttm($$texstring);
106: $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
107: $xmlstring=~s/\<br\>/\<br\/\>/g;
108: $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
109: $errorstring.=&tth::ttmerror();
110: } else {
111: $xmlstring=&tth::tth($$texstring);
112: $errorstring.=&tth::ttherror();
113: $xmlstring=~s-</font(\s*)>-</font>-g;
114: }
1.42 ! www 115: $xmlstring=~s/\s*\<br clear\=\"all\"/\<br/s;
1.36 albertel 116: $xmlstring=~s/^\s*//;
117: $xmlstring=~s/\s*$//;
118: alarm(0);
119: return ($xmlstring,$errorstring);
120: }
121:
1.1 harris41 122: sub converted {
1.31 albertel 123: my $texstring=shift;
1.34 www 124: my $xmlstring='['.&mt('UNDISPLAYABLE').']';
1.31 albertel 125: if ($Apache::lontexconvert::messedup) {
1.35 albertel 126: return '['.&mt('TeX unconverted due to previous errors').']';
1.31 albertel 127: }
128: eval(<<'ENDCONV');
1.36 albertel 129: ($xmlstring,$errorstring)=&convert_real($texstring)
1.12 www 130: ENDCONV
1.32 albertel 131: if ($@) {
1.35 albertel 132: $errorstring.=&mt("Evaluation Error: ").$@;
1.32 albertel 133: $Apache::lontexconvert::messedup=1;
134: }
1.37 albertel 135: if ($Apache::lontexconvert::messedup || &tth::tthmessedup() ||
136: $errorstring) {
1.31 albertel 137: &Apache::lonnet::logthis("Trying to kill myself");
138: $Apache::lontexconvert::messedup=1;
139: my $request=Apache->request();
140: $request->child_terminate();
141: }
142: return $xmlstring;
1.1 harris41 143: }
144:
145: # ====================================================================== Footer
146:
147: sub footer {
148: my $xmlstring='';
149: if ($ENV{'request.state'} eq 'construct') {
150: $xmlstring.='<address>'.$errorstring.'</address>';
151: } else {
152: &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
153: }
154: # -------------------------------------------------------------------- End Body
1.3 www 155: $xmlstring.=&Apache::lonxml::xmlend();
1.1 harris41 156: return $xmlstring;
1.6 www 157: }
158:
159: # ------------------------------------------------------------ Message display
160:
1.9 albertel 161: sub to_convert {
162: my ($string) = @_;
1.22 www 163: $string=~s/\<br\s*\/?\>/ /gs;
1.30 albertel 164: # $string=~s/\s/ /gs;
1.18 albertel 165: $string=&HTML::Entities::decode($string);
1.9 albertel 166: return &converted(\$string);
167: }
168:
1.20 www 169: sub smiley {
1.31 albertel 170: my $expression=shift;
171: if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; }
172: my %smileys=('\:\-\)' => 'smiley',
173: '8\-\)' => 'coolsmile',
174: '8\-(I|\|)' => 'coolindiff',
175: ':\-(I|\|)' => 'neutral',
176: '\:\-(o|O|\(\))' => 'shocked',
177: ':\-\(' => 'frowny',
178: '\;\-\)' => 'wink',
179: '\:\-P' => 'baeh',
180: '\:\-(\\\|\\/)' => 'hrrm',
181: '\:\-D' => 'bigsmile',
182: '\:\-C' => 'angry',
183: '\:(\'|\`)\-\(' => 'cry',
184: '\:\-(X|\#)' => 'lipsrsealed',
185: '\:\-S' => 'huh');
186: my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
187: foreach (keys %smileys) {
188: $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs;
189: }
190: return $expression;
1.20 www 191: }
192:
1.6 www 193: sub msgtexconverted {
1.39 raeburn 194: my ($message,$email) = @_;
1.17 albertel 195: $errorstring='';
1.29 albertel 196: &init_tth();
1.25 www 197: my $outmessage='';
198: my $tex=0;
199: foreach (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) {
200: if ($tex) {
1.30 albertel 201: if ($email) {
202: $outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0;
203: } else {
204: $outmessage.=&to_convert($_); $tex=0;
205: }
1.25 www 206: } else {
207: $outmessage.=&smiley($_); $tex=1;
208: }
209: }
1.24 albertel 210: if (wantarray) {
1.25 www 211: return ($outmessage,$errorstring);
1.24 albertel 212: } else {
1.25 www 213: return $outmessage.$errorstring;
1.24 albertel 214: }
1.1 harris41 215: }
216:
217: 1;
218: __END__
219:
220:
221:
222:
223:
224:
225:
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