--- loncom/xml/lontexconvert.pm 2002/10/25 15:08:09 1.11 +++ loncom/xml/lontexconvert.pm 2005/02/24 01:21:50 1.44 @@ -1,7 +1,7 @@ # The LearningOnline Network with CAPA # TeX Conversion Module # -# $Id: lontexconvert.pm,v 1.11 2002/10/25 15:08:09 www Exp $ +# $Id: lontexconvert.pm,v 1.44 2005/02/24 01:21:50 albertel Exp $ # # Copyright Michigan State University Board of Trustees # @@ -36,51 +36,108 @@ # 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::lonxml; +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 $time=time; - if ($ENV{'browser.mathml'}) { - &tth::ttminit(); - } else { - &tth::tthinit(); - } - return &Apache::lonxml::xmlbegin(). - &Apache::lonxml::fontsettings(). - "\n\n". - &Apache::lonxml::registerurl(undef,'tex'). - "\n\n"; + $errorstring=''; + my $time=time; + &init_tth(); + return &Apache::lonxml::xmlbegin(). + "\n\n". + &Apache::lonxml::fontsettings(). + &Apache::lonmenu::registerurl(undef,'tex'). + "\n\n"; } # ================================================================== Conversion +$Apache::lontexconvert::messedup=0; + +# we need this routine because &converted can get called from inside +# of the safespace (through &xmlparse('stuff') 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($$texstring); + $xmlstring=~s/\/\/g; + $xmlstring=~s/\/\/g; + $xmlstring=~s/\/\\<\/p\>/g; + $errorstring.=&tth::ttmerror(); + } else { + $xmlstring=&tth::tth($$texstring); + $errorstring.=&tth::ttherror(); + $xmlstring=~s---g; + } + $xmlstring=~s/^\s*\
/\/g; - $xmlstring=~s/\/\/g; - $xmlstring=~s/\/\\<\/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 $xmlstring; } # ====================================================================== Footer @@ -101,28 +158,78 @@ sub footer { sub to_convert { my ($string) = @_; - $string=~s/\/ /g; + $string=~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) { + $expression=~s/$_/\/gs; + } + return $expression; +} + sub msgtexconverted { - my $message=shift; + my ($message,$email) = @_; + $errorstring=''; + &init_tth(); + my $outmessage=''; + my $tex=0; + foreach (split(/(?:\<\;|\<)\/*m\s*(?:\>\;|\>)/i,$message)) { + if ($tex) { + if ($email) { + $outmessage.=''.&to_convert($_).'
'; $tex=0;
+	    } else {
+		$outmessage.=&to_convert($_); $tex=0;
+	    }
+	} else {
+            $outmessage.=&smiley($_); $tex=1;
+	}
+    }
+    if (wantarray) {
+	return ($outmessage,$errorstring);
+    } else {
+	return $outmessage.$errorstring;
+    }
+}
 
-    #FIXME this crap needs to go but right now the -L option might be
-    #ignored if this isn;t the first time the tth engine is used
-    #thus the \\document class crap, it makes sure we init the LaTeX stuff
-    if ($ENV{'browser.mathml'}) {
-      &tth::ttminit();
-      &tth::ttmoptions("-L");
+sub algebra {
+    my ($string,$target)=@_;
+    my $parser = new AlgParserWithImplicitExpand;
+    my $ret = $parser->parse($string);
+    my $result='['.&mt('Algebra unconverted due to previous errors').']';
+    if ( ref($ret) ) {
+	$parser->tostring();
+	$parser->normalize();
+	my $latex=$parser->tolatex();
+	$latex='$$'.$latex.'$$';
+	if ($target eq 'web' || $target eq 'analyze') {
+	    $result = &converted(\$latex);
+	} else {
+	    $result = $latex;
+	}
     } else {
-      &tth::tthinit();
-      &tth::tthoptions("-L");
+	&Apache::lonxml::error($parser->{'htmlerror'});
     }
-    $message=~s/(\$\$.+?\$\$)/&to_convert("\\documentclass{article}".$1)/ge;
-    $message=~s/(\$.+?\$)/&to_convert("\\documentclass{article}".$1)/ge;
-    $message=~s/(\\\(.+?\\\))/&to_convert("\\documentclass{article}".$1)/ge;
-    $message=~s/(\\\[.+?\\\])/&to_convert("\\documentclass{article}".$1)/ge;
-    return $message.$errorstring;
 }
 
 1;