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Changes were done according to Ed's desires: 1. Added righttriangle symbol yo any foil in the exam LaTeX mode (lines before bubbles). 2. Spacing adjustment of the text and bubbles is done. 3. Separation of problems with respect to foils (questions) is more clear now.

# The LearningOnline Network with CAPA
# Full matching style response
#
# $Id: matchresponse.pm,v 1.14 2003/03/26 18:43:15 sakharuk 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/
#
# 2/21 Guy

package Apache::matchresponse;
use strict;
use HTML::Entities();
use Math::Random();
use Apache::optionresponse;

my $flag_for_exam_printing = 1;
my @Items = ();

BEGIN {
    &Apache::lonxml::register('Apache::matchresponse',('matchresponse'));
}

sub start_matchresponse {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;
    #when in a matchresponse use these
    &Apache::lonxml::register('Apache::matchresponse',
			      ('foilgroup','foil','conceptgroup','item',
			       'itemgroup'));
    push (@Apache::lonxml::namespace,'matchresponse');
    my $id = &Apache::response::start_response($parstack,$safeeval);
    %Apache::hint::match=();
    if ($target eq 'meta') {
	$result=&Apache::response::meta_package_write('matchresponse');
    } elsif ($target eq 'edit' ) {
	$result.=&Apache::edit::start_table($token).
	    '<tr><td>'.&Apache::lonxml::description($token)."</td><td>Delete:".
	    &Apache::edit::deletelist($target,$token)
	    ."</td><td>&nbsp".&Apache::edit::end_row()
	    .&Apache::edit::start_spanning_row();
	
	$result.=
	    &Apache::edit::text_arg('Max Number Of Shown Foils:','max',$token,'4').
	    &Apache::edit::select_arg('Randomize Foil Order','randomize',
				      ['yes','no'],$token).
	    &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n";
    } elsif ($target eq 'modified') {
	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
						     $safeeval,'max',
						     'randomize');
	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
    }
    return $result;
}

sub end_matchresponse {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;
    if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
    &Apache::response::end_response;
    pop @Apache::lonxml::namespace;
    &Apache::lonxml::deregister('Apache::matchresponse',
				('foilgroup','foil','conceptgroup'));
    return $result;
}

%Apache::response::itemgroup=();
sub start_itemgroup {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;
    %Apache::response::itemgroup=();
    %Apache::matchresponse::itemtable=();
    if ($target eq 'edit') {
	$result=&Apache::edit::tag_start($target,$token);
	$result.=&Apache::edit::select_arg('Randomize Order:','randomize',
					   ['yes','no'],$token);
	$result.=&Apache::edit::select_arg('Items Display Location:',
					   'location',
					   ['top','bottom','left','right'],
					   $token);
	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
    } elsif ($target eq 'modified') {
	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
						     $safeeval,'randomize',
						     'location');
	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
    } elsif ($target eq 'web') {
	$Apache::matchresponse::itemtable{'location'}=
	    &Apache::lonxml::get_param('location',$parstack,$safeeval);
    }
    return $result;
}

sub end_itemgroup {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;

    if (!defined(@{ $Apache::response::itemgroup{'names'} })) { return; }
    my @names=@{ $Apache::response::itemgroup{'names'} };
    my $randomize =&Apache::lonxml::get_param('randomize',$parstack,$safeeval);
    if ($randomize ne 'no' ) {
	@names=&whichorder($#names+1,$randomize,0,
			   \%Apache::response::itemgroup)
    }
    my %letter_name_map;
    my %name_letter_map;
    my @alphabet=('A'..'Z');
    my $i=0;
    foreach my $name (@names) {
	$letter_name_map{$alphabet[$i]}=$name;
	$name_letter_map{$name}=$alphabet[$i];
	$Items[$i] = $alphabet[$i];
	$i++;
    }
     $Apache::response::itemgroup{'letter_name_map'}=\%letter_name_map;
    $Apache::response::itemgroup{'name_letter_map'}=\%name_letter_map;
    if ($target eq 'web') {
	my $table='<table>';
	my $i=0;
	foreach my $name (@names) {
	    $table.='<tr><td>'.$alphabet[$i].'</td><td>'.
		$Apache::response::itemgroup{$name.'.text'}.
		    '</td></tr>';
	    $i++;
	}
	$table.='</table>';
	$Apache::matchresponse::itemtable{'display'}=$table;
    } elsif ($target eq 'tex') {
	my $table=' \\\\\\\\ \begin{tabular}{ll} ';
	my $i=0;
	foreach my $name (@names) {
	    $Apache::response::itemgroup{$name.'.text'}=~s/\$\$/\$/g;
	    $table.=' '.$alphabet[$i].' & '.
		$Apache::response::itemgroup{$name.'.text'}.
		    ' \\\\ ';
	    $i++;
	}
	$table.=' \end{tabular} \\\\ ';
	$Apache::matchresponse::itemtable{'display'}=$table;
    } elsif ($target eq 'edit') { $result=&Apache::edit::end_table(); }
    return $result;
}

sub start_item {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result='';
    if ($target eq 'web' || $target eq 'tex') {
	&Apache::lonxml::startredirection;
    } elsif ($target eq 'edit') {
	my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
						 $safeeval,'-2');
	$result=&Apache::edit::tag_start($target,$token,"Item");
	$result.=&Apache::edit::text_arg('Name:','name',$token);
	if ($randomize ne 'no') {
	    $result.=&Apache::edit::select_arg('Location:','location',
					       ['random','top','bottom'],
					       $token);
	}
	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
    } elsif ($target eq 'modified') {
	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
						     $safeeval,'name',
						     'location');
	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
    }
    return $result;
}

sub end_item {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $text ='';
    my $result = '';
    if ($target eq 'web' || $target eq 'tex') {
	$text=&Apache::lonxml::endredirection;
    }
    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
	$target eq 'edit' || $target eq 'tex') {
	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
	my $location=&Apache::lonxml::get_param('location',$parstack,
						$safeeval);
	&Apache::lonxml::debug("Got a name of :$name:");
	if (!$name) { $name=$Apache::lonxml::curdepth; }
	&Apache::lonxml::debug("Using a name of :$name:");
	push @{ $Apache::response::itemgroup{'names'} }, $name;
	$Apache::response::itemgroup{"$name.text"} = $text;
	$Apache::response::itemgroup{"$name.location"} = $location;
    }
    if ($target eq 'edit') {
	$result.= &Apache::edit::tag_end($target,$token,'');
    }
    return $result;
}

sub insert_item {
    return '
<item name="">
<startouttext />
<endouttext />
</item>';
}

%Apache::response::foilgroup=();
sub start_foilgroup {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;
    %Apache::response::foilgroup=();
    $Apache::matchresponse::conceptgroup=0;
    &Apache::response::setrandomnumber();
    if ($target eq 'edit') {
	$result.=&Apache::edit::start_table($token)
	    ."<tr><td>Collection Of Foils</td><td>Delete:"
	    .&Apache::edit::deletelist($target,$token)
	    ."</td><td>&nbsp;".&Apache::edit::end_row()
            .&Apache::edit::start_spanning_row()."\n";
    }
    return $result;
}

sub end_foilgroup {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result;
    if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
	my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
	my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
						   $safeeval,'-2');
	if ($target eq 'web' || $target eq 'tex') {
	    $result=&displayfoils($target,$max,$randomize);
	} elsif ($target eq 'answer' ) {
	    $result=&displayanswers($max,$randomize);
	} elsif ( $target eq 'grade') {
	    &grade_response($max,$randomize);
	}
    } elsif ($target eq 'edit') {
	$result=&Apache::edit::end_table();
    }
    return $result;
}

sub displayanswers {
    my ($max,$randomize,@opt)=@_;
    if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
    my @names = @{ $Apache::response::foilgroup{'names'} };
    my @whichfoils = &whichorder(&getfoilcounts($max),$randomize,
				 &Apache::response::showallfoils(),
				 \%Apache::response::foilgroup);
    my $result=&Apache::response::answer_header('matchresponse');
    my %name_letter_map;
    if (defined(%{ $Apache::response::itemgroup{'name_letter_map'} })) {
	%name_letter_map=
	    %{ $Apache::response::itemgroup{'name_letter_map'} };
    }
    foreach my $name (@whichfoils) {
	my $value_name=$Apache::response::foilgroup{$name.'.value'};
	my $letter=$name_letter_map{$value_name};
	$result.=&Apache::response::answer_part('matchresponse',$letter);
    }
    $result.=&Apache::response::answer_footer('matchresponse');
    return $result;
}


sub grade_response {
    my ($max,$randomize)=@_;
    my (@whichfoils)=&whichorder(&getfoilcounts($max),$randomize,
				 &Apache::response::showallfoils(),
				 \%Apache::response::foilgroup);
    if (!defined($ENV{'form.submitted'})) { return; }
    my %responsehash;
    my %grade;
    my ($temp,$right,$wrong,$ignored)=(0,0,0,0);
    my %letter_name_map;
    if (defined(%{ $Apache::response::itemgroup{'letter_name_map'} })) {
	%letter_name_map=
	    %{ $Apache::response::itemgroup{'letter_name_map'} };
    }
    foreach my $name (@whichfoils) {
	my $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1'].":$temp"};
	my $responsename = $letter_name_map{$response};
	$responsehash{$name}=$responsename;
	my $value=$Apache::response::foilgroup{$name.'.value'};
	if ( $response =~ /[^\s]/) {
	    &Apache::lonxml::debug("submitted a $response for $value<br />\n");
	    if ($value eq $responsename) {
		$grade{$name}='1'; $right++;
	    } else {
		$grade{$name}='0'; $wrong++;
	    }
	} else {
	    $ignored++;
	}
	$temp++;
    }
    my $part=$Apache::inputtags::part;
    my $id = $Apache::inputtags::response['-1'];
    my $responsestr=&Apache::lonnet::hash2str(%responsehash);
    my $gradestr   =&Apache::lonnet::hash2str(%grade);
    my %previous =&Apache::response::check_for_previous($responsestr,
							$part,$id);
    &Apache::lonxml::debug("Got $right right and $wrong wrong, and $ignored were ignored ");
    my $ad;
    if ($wrong==0 && $ignored==0) {
	$ad='EXACT_ANS';
    } elsif ($wrong==0 && $right==0) {
	#nothing submitted
    } else {
	if ($ignored==0) {
	    $ad='INCORRECT';
	} else {
	    $ad='MISSING_ANSWER';
	}
    }
    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
	$responsestr;
    $Apache::lonhomework::results{"resource.$part.$id.submissiongrading"}=
	$gradestr;
    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
    &Apache::response::handle_previous(\%previous,$ad);
}

sub itemdisplay {
    my ($location)=@_;
    if ($location eq 'top' &&
	!defined($Apache::matchresponse::itemtable{'location'})) {
	return $Apache::matchresponse::itemtable{'display'};
    }
    if ($Apache::matchresponse::itemtable{'location'} eq $location) {
	return $Apache::matchresponse::itemtable{'display'};
    }
    return undef;
}
sub displayfoils {
    my ($target,$max,$randomize)=@_;
    my $result;
    my $question;
    my (@whichfoils)=&whichorder(&getfoilcounts($max),$randomize,
				 &Apache::response::showallfoils(),
				 \%Apache::response::foilgroup);
    my $part=$Apache::inputtags::part;
    my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
    my $status=$Apache::inputtags::status[-1];
    my %letter_name_map;
    if (defined(%{ $Apache::response::itemgroup{'letter_name_map'} })) {
	%letter_name_map=
	    %{ $Apache::response::itemgroup{'letter_name_map'} };
    }
    my %name_letter_map;
    if (defined(%{ $Apache::response::itemgroup{'name_letter_map'} })) {
	%name_letter_map=
	    %{ $Apache::response::itemgroup{'name_letter_map'} };
    }
    if (($solved =~ /^correct/) || ($status eq  'SHOW_ANSWER')) {
	foreach my $name (@whichfoils) {
	    my $text=$Apache::response::foilgroup{$name.'.text'};
	    my $value=$Apache::response::foilgroup{$name.'.value'};
	    my $letter=$name_letter_map{$value};
	    if ($target eq 'tex') {
		$question.=' \\\\ '.$letter.':'.$text;
	    } else {
		$question.='<br />'.$letter.':'.$text;
	    }
	}
    } else {
	my $i = 0;
	my $temp=0;
	my $id=$Apache::inputtags::response[-1];
	my $part=$Apache::inputtags::part;
	my $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};
	my %lastresponse=&Apache::lonnet::str2hash($lastresponse);    
	my @alphabet=('A'..'Z');
        my @Items_letter = splice @alphabet, 0, $#Items + 1;
	foreach my $name (@whichfoils) {
	    my $lastopt=$lastresponse{$name};
	    my $last_letter=$name_letter_map{$lastopt};
	    my $optionlist = '';
	    if ($target ne 'tex') {
		$optionlist="<option></option>\n";
	    } else {
		if ($Apache::lonhomework::type ne 'exam') {
		    $optionlist='\framebox[5 mm][s]{\tiny\strut}';
		}
	    }
	    my $option;
	    foreach $option (sort(keys(%letter_name_map))) {
		if ($option eq $last_letter) {
		    if ($target ne 'tex') {$optionlist.="<option selected=\"on\">$option</option>\n";}
		} else {
		    if ($target ne 'tex') {$optionlist.="<option>$option</option>\n";}
		}
	    }
	    if ($target ne 'tex') {
	        $optionlist='<select name="HWVAL_'.
		    $Apache::inputtags::response[-1].':'.$temp.'">'.
		        $optionlist."</select>\n";
	    }
	    my $text=$Apache::response::foilgroup{$name.'.text'};
	    if ($target ne 'tex') {
		$question.='<br />'.$optionlist.$text."\n";
		if ($Apache::lonhomework::type eq 'exam') {
		    $question.=&Apache::optionresponse::webbubbles(\@Items_letter,\@Items);
		}
	    } else {		
		if ($Apache::lonhomework::type eq 'exam') {
		    $question.=' '.$optionlist.$text."\n";
		    my @emptyItems = ();
		    for (my $i=0;$i<=$#Items;$i++) {push @emptyItems, ' ';}
		    $question.='\vskip -2 mm\parbox{\textwidth}{\begin{enumerate}\item[\textbf{'.$Apache::lonxml::counter.'}.]\parbox{\textwidth - 5 mm}{'.&Apache::optionresponse::bubbles(\@Items_letter,\@emptyItems).'}\end{enumerate}} \vskip -10 mm \strut ';
	        } else {
		    $question.=' \\\\ '.$optionlist.$text."\n";
		}
            } 
	    $temp++;
	}
    }
    if ($result=&itemdisplay('top')) {
	$result.=$question;
    } elsif ($result=&itemdisplay('bottom')) {
	$result=$question.$result;
    } elsif ($result=&itemdisplay('right')) {
	$result='<table><tr><td>'.$question.'</td><td>'.$result.
	    '</td></tr></table>';
    } elsif ($result=&itemdisplay('left')) {
	$result='<table><tr><td>'.$result.'</td><td>'.$question.
	    '</td></tr></table>';
    }
    if ($target ne 'tex') {$result.="<br />";} else {$result.=' \\\\ ';}
    return $result;
}

sub getfoilcounts {
    my ($max)=@_;
    # +1 since instructors will count from 1
    my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
    if (&Apache::response::showallfoils()) { $max=$count; }
    if ($count>$max) { $count=$max } 
    &Apache::lonxml::debug("Count is $count from $max");
    return $count;
}

sub whichorder {
    my ($max,$randomize,$showall,$hash)=@_;
    #&Apache::lonxml::debug("man $max randomize $randomize");
    if (!defined(@{ $$hash{'names'} })) { return; }
    my @names = @{ $$hash{'names'} };
    my @whichopt =();
    my (%top,@toplist,%bottom,@bottomlist);
    if (!($showall || ($randomize eq 'no'))) {
	my $current=0;
	foreach my $name (@names) {
	    $current++;
	    if ($$hash{"$name.location"} eq 'top') {
		$top{$name}=$current;
	    } elsif ($$hash{"$name.location"} eq 'bottom') {
		$bottom{$name}=$current;
	    }
	}
    }
    while ((($#whichopt+1) < $max) && ($#names > -1)) {
	#&Apache::lonxml::debug("Have $#whichopt max is $max");
	my $aopt;
	if ($showall || ($randomize eq 'no')) {
	    $aopt=0;
	} else {
	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
	}
	#&Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
	$aopt=splice(@names,$aopt,1);
	#&Apache::lonxml::debug("Picked $aopt");
	if ($top{$aopt}) {
	    $toplist[$top{$aopt}]=$aopt;
	} elsif ($bottom{$aopt}) {
	    $bottomlist[$bottom{$aopt}]=$aopt;
	} else {
	    push (@whichopt,$aopt);
	}
    }
    for (my $i=0;$i<=$#toplist;$i++) {
	if ($toplist[$i]) { unshift(@whichopt,$toplist[$i]) }
    }
    for (my $i=0;$i<=$#bottomlist;$i++) {
	if ($bottomlist[$i]) { push(@whichopt,$bottomlist[$i]) }
    }

    return @whichopt;
}

sub start_conceptgroup {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    $Apache::matchresponse::conceptgroup=1;
    %Apache::response::conceptgroup=();
    my $result;
    if ($target eq 'edit') {
	$result.=&Apache::edit::tag_start($target,$token,
					  "Concept Grouped Foils");
	$result.=&Apache::edit::text_arg('Concept:','concept',$token,'50').
	    &Apache::edit::end_row().&Apache::edit::start_spanning_row();
    }
    if ($target eq 'modified') {
	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
						     $safeeval,'concept');
	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
    }
    return $result;
}

sub end_conceptgroup {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    $Apache::matchresponse::conceptgroup=0;
    my $result='';
    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ) {
	#if not there aren't any foils to display and thus no question
	if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
	    my @names = @{ $Apache::response::conceptgroup{'names'} };
	    my $pick=int(&Math::Random::random_uniform() * ($#names+1));
	    my $name=$names[$pick];
	    push @{ $Apache::response::foilgroup{'names'} }, $name;
	    $Apache::response::foilgroup{"$name.value"} =
		$Apache::response::conceptgroup{"$name.value"};
	    $Apache::response::foilgroup{"$name.text"} =
		$Apache::response::conceptgroup{"$name.text"};
	    $Apache::response::foilgroup{"$name.location"} =
		$Apache::response::conceptgroup{"$name.location"};
	    my $concept = &Apache::lonxml::get_param('concept',$parstack,
						     $safeeval);
	    $Apache::response::foilgroup{"$name.concept"} = $concept;
	    &Apache::lonxml::debug("Selecting $name in $concept");
	    if ($target eq 'web') {
		my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
		push(@{ $Apache::hint::match{"$part_id.concepts"} },
		     $concept);
		$Apache::hint::match{"$part_id.concept.$concept"}=
		    $Apache::response::conceptgroup{'names'};
	    }
	}
    } elsif ($target eq 'edit') {
	$result=&Apache::edit::end_table();
    }
    return $result;
}

sub insert_conceptgroup {
    my $result="\n\t\t<conceptgroup concept=\"\">".&insert_foil()."\n\t\t</conceptgroup>\n";
    return $result;
}

sub start_foil {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $result='';
    if ($target eq 'web' || $target eq 'tex') {
	&Apache::lonxml::startredirection;
    } elsif ($target eq 'edit') {
	$result=&Apache::edit::tag_start($target,$token,"Foil");
	my $level='-2';
	if ($$tagstack[-2] eq 'conceptgroup') { $level = '-3'; }
	$result.=&Apache::edit::text_arg('Name:','name',$token);
	my @names;
	if (defined(@{ $Apache::response::itemgroup{'names'} })) {
	    @names=@{ $Apache::response::itemgroup{'names'} };
	}
	$result.= &Apache::edit::select_or_text_arg('Correct Option:','value',['unused',@names],$token,'15');
	my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
						 $safeeval,'-3');
	if ($randomize ne 'no') {
	    $result.=&Apache::edit::select_arg('Location:','location',
					     ['random','top','bottom'],$token);
	}
	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
    } elsif ($target eq 'modified') {
	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
						     $safeeval,'value',
						     'name','location');
	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
    }
    return $result;
}

sub end_foil {
    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
    my $text ='';
    my $result = '';
    if ($target eq 'web' || $target eq 'tex') {
	$text=&Apache::lonxml::endredirection;
    }
    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
	my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
	if ($value ne 'unused') {
	    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
	    my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);
	    &Apache::lonxml::debug("Got a name of :$name:");
	    if (!$name) { $name=$Apache::lonxml::curdepth; }
	    &Apache::lonxml::debug("Using a name of :$name:");
	    if ( $Apache::matchresponse::conceptgroup
		 && !&Apache::response::showallfoils() ) {
		push @{ $Apache::response::conceptgroup{'names'} }, $name;
		$Apache::response::conceptgroup{"$name.value"} = $value;
		if ($target eq 'tex') {
		    $Apache::response::conceptgroup{"$name.text"} = ' $\triangleright$ '.$text;
		} else {
		    $Apache::response::conceptgroup{"$name.text"} = $text;
		}
		$Apache::response::conceptgroup{"$name.location"} = $location;
	    } else {
		push @{ $Apache::response::foilgroup{'names'} }, $name;
		$Apache::response::foilgroup{"$name.value"} = $value;
		if ($Apache::lonhomework::type eq 'exam' and $flag_for_exam_printing) {
		    $Apache::response::foilgroup{"$name.text"} = '\vskip 5 mm $\triangleright$ '.$text;
		} else {
		    if ($target eq 'tex') {
			$Apache::response::foilgroup{"$name.text"} = ' $\triangleright$ '.$text;
		    } else {
			$Apache::response::foilgroup{"$name.text"} = $text;
		    }
		}
		$Apache::response::foilgroup{"$name.location"} = $location;
	    }
	}
    }
    if ($target eq 'edit') {
	$result.= &Apache::edit::tag_end($target,$token,'');
    }
    return $result;
}

sub insert_foil {
    return '
<foil name="" value="unused">
<startouttext />
<endouttext />
</foil>';
}
1;
__END__