version 1.3, 2001/05/04 17:38:22
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version 1.49, 2005/02/24 08:32:11
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# The LearningOnline Network with CAPA |
# The LearningOnline Network with CAPA |
# TeX Conversion Module |
# TeX Conversion Module |
# |
# |
# 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer |
# $Id$ |
# 05/03/2001 Scott Harrison |
# |
# 5/4 Gerd Kortemeyer |
# Copyright Michigan State University Board of Trustees |
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# |
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# This file is part of the LearningOnline Network with CAPA (LON-CAPA). |
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# |
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# LON-CAPA is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# LON-CAPA is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with LON-CAPA; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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# |
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# /home/httpd/html/adm/gpl.txt |
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# |
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# http://www.lon-capa.org/ |
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# |
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# Copyright for TtHfunc and TtMfunc by Ian Hutchinson. |
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# TtHfunc and TtMfunc (the "Code") may be compiled and linked into |
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# binary executable programs or libraries distributed by the |
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# Michigan State University (the "Licensee"), but any binaries so |
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# distributed are hereby licensed only for use in the context |
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# of a program or computational system for which the Licensee is the |
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# primary author or distributor, and which performs substantial |
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# additional tasks beyond the translation of (La)TeX into HTML. |
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# The C source of the Code may not be distributed by the Licensee |
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# to any other parties under any circumstances. |
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# |
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package Apache::lontexconvert; |
package Apache::lontexconvert; |
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use strict; |
use strict; |
use tth; |
use tth(); |
use vars qw($errorstring); |
use vars qw($errorstring); |
use Apache::lonmsg; |
use Apache(); |
use Apache::lonxml; |
use Apache::lonmsg(); |
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use Apache::lonxml(); |
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use Apache::lonmenu(); |
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use Apache::lonlocal; |
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# ====================================================================== Header |
# ====================================================================== Header |
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sub init_tth { |
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my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'}; |
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if ($ENV{'browser.mathml'}) { |
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&tth::ttminit(); |
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if ($ENV{'browser.unicode'}) { |
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&tth::ttmoptions('-L -u1 '.$options); |
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} else { |
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&tth::ttmoptions('-L -u0 '.$options); |
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} |
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} else { |
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&tth::tthinit(); |
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if ($ENV{'browser.unicode'}) { |
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&tth::tthoptions('-L -u1 '.$options); |
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} else { |
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&tth::tthoptions('-L -u0 '.$options); |
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} |
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} |
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} |
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sub header { |
sub header { |
$errorstring=''; |
$errorstring=''; |
my $time=time; |
my $time=time; |
if ($ENV{'browser.mathml'}) { |
&init_tth(); |
&tth::ttminit(); |
return &Apache::lonxml::xmlbegin(). |
} else { |
"\n<head>\n". |
&tth::tthinit(); |
&Apache::lonxml::fontsettings(). |
} |
&Apache::lonmenu::registerurl(undef,'tex'). |
return &Apache::lonxml::xmlbegin(). |
"\n</head>\n"; |
&Apache::lonxml::fontsettings(). |
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"\n<head>\n". |
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&Apache::lonxml::registerurl(). |
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"\n</head>\n"; |
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} |
} |
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# ================================================================== Conversion |
# ================================================================== Conversion |
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$Apache::lontexconvert::messedup=0; |
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# we need this routine because &converted can get called from inside |
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# of the safespace (through &xmlparse('<m>stuff</m>') which doesn't |
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# allow the opcode for alarm, so we need to compile this before we get |
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# into the safe space since opcode checks only occur at compile time |
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sub convert_real { |
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my ($texstring)=@_; |
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my ($xmlstring,$errorstring); |
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local $SIG{SEGV}=sub { $Apache::lontexconvert::messedup=1; die; }; |
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local $SIG{ALRM}=sub { |
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&Apache::lonnet::logthis("ALRM"); |
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$xmlstring='['.&mt("TeX unconverted due to errors").']'; |
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$Apache::lontexconvert::messedup=1; |
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die &mt("TeX unconverted due to errors"); |
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}; |
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alarm($Apache::lonnet::perlvar{'lonScriptTimeout'}); |
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if ($ENV{'browser.mathml'}) { |
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$xmlstring=&tth::ttm($$texstring); |
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$xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g; |
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$xmlstring=~s/\<br\>/\<br\/\>/g; |
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$xmlstring=~s/\<p\>/\<p\>\<\/p\>/g; |
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$errorstring.=&tth::ttmerror(); |
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} else { |
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$xmlstring=&tth::tth($$texstring); |
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$errorstring.=&tth::ttherror(); |
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$xmlstring=~s-</font(\s*)>-</font>-g; |
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} |
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$xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s; |
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$xmlstring=~s/^\s*//; |
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$xmlstring=~s/\s*$//; |
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alarm(0); |
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return ($xmlstring,$errorstring); |
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} |
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sub converted { |
sub converted { |
my $texstring=shift; |
my $texstring=shift; |
my $xmlstring; |
my $xmlstring='['.&mt('UNDISPLAYABLE').']'; |
if ($ENV{'browser.mathml'}) { |
if ($Apache::lontexconvert::messedup) { |
$xmlstring=&tth::ttm($$texstring); |
return '['.&mt('TeX unconverted due to previous errors').']'; |
$xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g; |
} |
$xmlstring=~s/\<br\>/\<br\/\>/g; |
eval(<<'ENDCONV'); |
$xmlstring=~s/\<p\>/\<p\>\<\/p\>/g; |
($xmlstring,$errorstring)=&convert_real($texstring) |
$errorstring.=&tth::ttmerror(); |
ENDCONV |
} else { |
if ($@) { |
$xmlstring=&tth::tth($$texstring); |
$errorstring.=&mt("Evaluation Error: ").$@; |
$errorstring.=&tth::ttherror(); |
$Apache::lontexconvert::messedup=1; |
} |
} |
return $xmlstring; |
if ($Apache::lontexconvert::messedup || &tth::tthmessedup() || |
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$errorstring) { |
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&Apache::lonnet::logthis("Trying to kill myself"); |
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$Apache::lontexconvert::messedup=1; |
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my $request=Apache->request(); |
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$request->child_terminate(); |
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} |
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return $xmlstring; |
} |
} |
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# ====================================================================== Footer |
# ====================================================================== Footer |
Line 62 sub footer {
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Line 154 sub footer {
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return $xmlstring; |
return $xmlstring; |
} |
} |
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# ------------------------------------------------------------ Message display |
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sub to_convert { |
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my ($string) = @_; |
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$string=~s/\<br\s*\/?\>/ /gs; |
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# $string=~s/\s/ /gs; |
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$string=&HTML::Entities::decode($string); |
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return &converted(\$string); |
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} |
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sub smiley { |
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my $expression=shift; |
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if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; } |
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my %smileys=('\:\-\)' => 'smiley', |
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'8\-\)' => 'coolsmile', |
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'8\-(I|\|)' => 'coolindiff', |
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':\-(I|\|)' => 'neutral', |
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'\:\-(o|O|\(\))' => 'shocked', |
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':\-\(' => 'frowny', |
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'\;\-\)' => 'wink', |
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'\:\-P' => 'baeh', |
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'\:\-(\\\|\\/)' => 'hrrm', |
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'\:\-D' => 'bigsmile', |
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'\:\-C' => 'angry', |
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'\:(\'|\`)\-\(' => 'cry', |
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'\:\-(X|\#)' => 'lipsrsealed', |
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'\:\-S' => 'huh'); |
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my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'}; |
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foreach (keys %smileys) { |
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$expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs; |
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} |
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return $expression; |
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} |
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sub msgtexconverted { |
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my ($message,$email) = @_; |
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$errorstring=''; |
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&init_tth(); |
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my $outmessage=''; |
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my $tex=0; |
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foreach (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { |
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if ($tex) { |
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if ($email) { |
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$outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0; |
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} else { |
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$outmessage.=&to_convert($_); $tex=0; |
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} |
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} else { |
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$outmessage.=&smiley($_); $tex=1; |
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} |
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} |
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if (wantarray) { |
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return ($outmessage,$errorstring); |
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} else { |
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return $outmessage.$errorstring; |
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} |
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} |
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sub algebra { |
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use AlgParser; |
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my ($string,$target)=@_; |
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my $parser = new AlgParserWithImplicitExpand; |
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$string=&prepare_algebra($string); |
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my $ret = $parser->parse($string); |
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my $result='['.&mt('Algebra unconverted due to previous errors').']'; |
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if ( ref($ret) ) { |
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$parser->tostring(); |
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$parser->normalize(); |
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my $latex=$parser->tolatex(); |
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$latex=&postprocess_algebra($latex); |
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$latex='$'.$latex.'$'; |
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if ($target eq 'web' || $target eq 'analyze') { |
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$result = &converted(\$latex); |
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} else { |
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$result = $latex; |
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} |
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} else { |
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&Apache::lonxml::error($parser->{'htmlerror'}); |
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} |
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} |
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sub prepare_algebra { |
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my ($string)=@_; |
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# change some multi character operators into single character operators |
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$string =~ s/<>/\#/g; |
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$string =~ s/<\=/\%/g; |
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$string =~ s/>\=/\!/g; |
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# makes the decision about what is a minus sign easier |
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$string =~ s/([\=\>\<\%\!\#] *)-/$1 zeroplace -/g; |
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return $string; |
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} |
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sub postprocess_algebra { |
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my ($string)=@_; |
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# exapnd out some operators |
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$string =~ s/\#/\\not= /g; |
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$string =~ s/\%/\\leq /g; |
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$string =~ s/\!/\\geq /g; |
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return $string; |
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} |
1; |
1; |
__END__ |
__END__ |
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