--- loncom/xml/lontexconvert.pm 2001/05/03 21:28:53 1.1
+++ loncom/xml/lontexconvert.pm 2005/01/31 11:26:08 1.41
@@ -1,70 +1,145 @@
# The LearningOnline Network with CAPA
# TeX Conversion Module
#
+# $Id: lontexconvert.pm,v 1.41 2005/01/31 11:26:08 www Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+# Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
+# TtHfunc and TtMfunc (the "Code") may be compiled and linked into
+# binary executable programs or libraries distributed by the
+# Michigan State University (the "Licensee"), but any binaries so
+# distributed are hereby licensed only for use in the context
+# of a program or computational system for which the Licensee is the
+# primary author or distributor, and which performs substantial
+# additional tasks beyond the translation of (La)TeX into HTML.
+# The C source of the Code may not be distributed by the Licensee
+# to any other parties under any circumstances.
+#
# 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer
-# 05/03/2001 Scott Harrison
+# 5/4 Gerd Kortemeyer
package Apache::lontexconvert;
use strict;
-use tth;
+use tth();
use vars qw($errorstring);
-use Apache::lonmsg;
+use Apache();
+use Apache::lonmsg();
+use Apache::lonxml();
+use Apache::lonmenu();
+use Apache::lonlocal;
# ====================================================================== Header
+sub init_tth {
+ my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'};
+ if ($ENV{'browser.mathml'}) {
+ &tth::ttminit();
+ if ($ENV{'browser.unicode'}) {
+ &tth::ttmoptions('-L -u1 '.$options);
+ } else {
+ &tth::ttmoptions('-L -u0 '.$options);
+ }
+ } else {
+ &tth::tthinit();
+ if ($ENV{'browser.unicode'}) {
+ &tth::tthoptions('-L -u1 '.$options);
+ } else {
+ &tth::tthoptions('-L -u0 '.$options);
+ }
+ }
+}
+
sub header {
- $errorstring='';
- my $time=time;
- my $addhead=<<END;
-<script language="JavaScript">
- if (window.location.pathname!="/res/adm/pages/menu.html") {
- menu=window.open("","LONCAPAmenu");
- menu.currentURL=window.location.href;
- }
-</script>
-END
- if ($ENV{'browser.mathml'}) {
- &tth::ttminit();
- return '<?xml version="1.0"?>'
- .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
- .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
- .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
- .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" '
- .'xmlns="http://www.w3.org/TR/REC-html40">'
- ."<head>$addhead</head>"
- ."\n";
- } else {
- &tth::tthinit();
- my $headerstring='<html>';
- if ($ENV{'browser.os'} eq 'mac') {
- $headerstring.="<head>\n"
- .'<meta Content-Type="text/html; charset=x-mac-roman">'
- ."\n$addhead</head>\n";
- }
- else {
- $headerstring.="<head>$addhead</head>";
- }
- return $headerstring."\n";
- }
+ $errorstring='';
+ my $time=time;
+ &init_tth();
+ return &Apache::lonxml::xmlbegin().
+ "\n<head>\n".
+ &Apache::lonxml::fontsettings().
+ &Apache::lonmenu::registerurl(undef,'tex').
+ "\n</head>\n";
}
# ================================================================== Conversion
+$Apache::lontexconvert::messedup=0;
+
+# we need this routine because &converted can get called from inside
+# of the safespace (through &xmlparse('<m>stuff</m>') which doesn't
+# allow the opcode for alarm, so we need to compile this before we get
+# into the safe space since opcode checks only occur at compile time
+sub convert_real {
+ my ($texstring)=@_;
+ my ($xmlstring,$errorstring);
+ local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; };
+ local $SIG{ALRM}=sub {
+ &Apache::lonnet::logthis("ALRM");
+ $xmlstring='['.&mt("TeX unconverted due to errors").']';
+ $Apache::lontexconvert::messedup=1;
+ die &mt("TeX unconverted due to errors");
+ };
+ alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
+ if ($ENV{'browser.mathml'}) {
+ $xmlstring=&tth::ttm($$texstring);
+ $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
+ $xmlstring=~s/\<br\>/\<br\/\>/g;
+ $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
+ $errorstring.=&tth::ttmerror();
+ } else {
+ $xmlstring=&tth::tth($$texstring);
+ $errorstring.=&tth::ttherror();
+ $xmlstring=~s-</font(\s*)>-</font>-g;
+ }
+ $xmlstring=~s/\<br clear\=\"all\"/\<br/gs;
+ $xmlstring=~s/^\s*//;
+ $xmlstring=~s/\s*$//;
+ alarm(0);
+ return ($xmlstring,$errorstring);
+}
+
sub converted {
my $texstring=shift;
- my $xmlstring;
- if ($ENV{'browser.mathml'}) {
- $xmlstring=&tth::ttm($$texstring);
- $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
- $xmlstring=~s/\<br\>/\<br\/\>/g;
- $xmlstring=~s/\<p\>/\<p\>\<\/p\>/g;
- $errorstring.=&tth::ttmerror();
- } else {
- $xmlstring=&tth::tth($$texstring);
- $errorstring.=&tth::ttherror();
- }
- return $xmlstring;
+ my $xmlstring='['.&mt('UNDISPLAYABLE').']';
+ if ($Apache::lontexconvert::messedup) {
+ return '['.&mt('TeX unconverted due to previous errors').']';
+ }
+ eval(<<'ENDCONV');
+ ($xmlstring,$errorstring)=&convert_real($texstring)
+ENDCONV
+ if ($@) {
+ $errorstring.=&mt("Evaluation Error: ").$@;
+ $Apache::lontexconvert::messedup=1;
+ }
+ if ($Apache::lontexconvert::messedup || &tth::tthmessedup() ||
+ $errorstring) {
+ &Apache::lonnet::logthis("Trying to kill myself");
+ $Apache::lontexconvert::messedup=1;
+ my $request=Apache->request();
+ $request->child_terminate();
+ }
+ return $xmlstring;
}
# ====================================================================== Footer
@@ -77,10 +152,68 @@ sub footer {
&Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);
}
# -------------------------------------------------------------------- End Body
- $xmlstring.='</html>';
+ $xmlstring.=&Apache::lonxml::xmlend();
return $xmlstring;
}
+# ------------------------------------------------------------ Message display
+
+sub to_convert {
+ my ($string) = @_;
+ $string=~s/\<br\s*\/?\>/ /gs;
+# $string=~s/\s/ /gs;
+ $string=&HTML::Entities::decode($string);
+ return &converted(\$string);
+}
+
+sub smiley {
+ my $expression=shift;
+ if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; }
+ my %smileys=('\:\-\)' => 'smiley',
+ '8\-\)' => 'coolsmile',
+ '8\-(I|\|)' => 'coolindiff',
+ ':\-(I|\|)' => 'neutral',
+ '\:\-(o|O|\(\))' => 'shocked',
+ ':\-\(' => 'frowny',
+ '\;\-\)' => 'wink',
+ '\:\-P' => 'baeh',
+ '\:\-(\\\|\\/)' => 'hrrm',
+ '\:\-D' => 'bigsmile',
+ '\:\-C' => 'angry',
+ '\:(\'|\`)\-\(' => 'cry',
+ '\:\-(X|\#)' => 'lipsrsealed',
+ '\:\-S' => 'huh');
+ my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
+ foreach (keys %smileys) {
+ $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs;
+ }
+ return $expression;
+}
+
+sub msgtexconverted {
+ my ($message,$email) = @_;
+ $errorstring='';
+ &init_tth();
+ my $outmessage='';
+ my $tex=0;
+ foreach (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) {
+ if ($tex) {
+ if ($email) {
+ $outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0;
+ } else {
+ $outmessage.=&to_convert($_); $tex=0;
+ }
+ } else {
+ $outmessage.=&smiley($_); $tex=1;
+ }
+ }
+ if (wantarray) {
+ return ($outmessage,$errorstring);
+ } else {
+ return $outmessage.$errorstring;
+ }
+}
+
1;
__END__