--- loncom/homework/hint.pm	2003/04/18 07:53:15	1.41
+++ loncom/homework/hint.pm	2006/12/19 00:40:38	1.65
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # implements the tags that control the hints
 #
-# $Id: hint.pm,v 1.41 2003/04/18 07:53:15 albertel Exp $
+# $Id: hint.pm,v 1.65 2006/12/19 00:40:38 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,11 +29,16 @@
 package Apache::hinttags; 
 
 use strict;
-use Apache::lonnet;
+use Apache::lonnet();
 use capa;
+use Apache::caparesponse();
+use Apache::lonmaxima();
+use Apache::response();
+use Apache::lonlocal;
+use Storable qw(dclone);
 
 BEGIN {
-    &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart','numericalhint','stringhint','formulahint','optionhint','radiobuttonhint'));
+    &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart','numericalhint','stringhint','formulahint','optionhint','radiobuttonhint','mathhint','customhint'));
 }
 
 
@@ -47,15 +52,30 @@ sub start_hintgroup {
 	my $id=$Apache::inputtags::part;
 	my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
 	if ( $numtries eq '') { $numtries = 0; }
-	my $hinttries=&Apache::lonnet::EXT("resource.$id.hinttries");
-	if ( $hinttries eq '') { $hinttries = 1; }
+	my $hinttries=&Apache::response::get_response_param($id,"hinttries",1);
 	&Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
-	if ( $numtries < $hinttries ) {
-	    &Apache::lonxml::get_all_text("/hintgroup",$parser);
+	my $gradestatus=
+	    $Apache::lonhomework::history{"resource.$id.solved"};
+	my $showoncorrect=lc(&Apache::lonxml::get_param('showoncorrect',$parstack,$safeeval));	
+	&Apache::lonxml::debug("onc orrect $showoncorrect, $gradestatus");
+	if ( ($showoncorrect ne 'yes' && &Apache::response::show_answer()) ||
+	     ( $numtries < $hinttries) ) {
+	    &Apache::lonxml::debug("Grabbin all");
+	    &Apache::lonxml::get_all_text("/hintgroup",$parser,$style);
 	}
 	&Apache::lonxml::startredirection;
     } elsif ($target eq 'tex') {
 	$result .= '\keephidden{';
+    } elsif ($target eq 'edit') {
+	$result.=&Apache::edit::tag_start($target,$token);
+	$result.=&Apache::edit::select_arg('Show hint even if problem Correct:','showoncorrect',[['no',&mt('No')],['yes',&mt('Yes')]],$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,'showoncorrect');
+       if ($constructtag) {
+           $result =&Apache::edit::rebuild_tag($token);
+           $result.=&Apache::edit::handle_insert();
+       }
     }
     @Apache::hint::which=();
     return $result;
@@ -69,8 +89,7 @@ sub end_hintgroup {
 	my $id=$Apache::inputtags::part;
 	my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
 	if ( $numtries eq '') { $numtries = 0; }
-	my $hinttries=&Apache::lonnet::EXT("resource.$id.hinttries");
-	if ( $hinttries eq '') { $hinttries = 1; }
+	my $hinttries=&Apache::response::get_response_param($id,"hinttries",1);
 	&Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
 	my $hinttext=&Apache::lonxml::endredirection;
 	if ($Apache::lonhomework::type ne 'exam' &&
@@ -79,7 +98,7 @@ sub end_hintgroup {
 		$hinttext.'</td></tr></table>';
 	}
     } elsif ($target eq 'edit') {
-	$result.=&Apache::edit::end_table();
+	$result.=&Apache::edit::end_row().&Apache::edit::end_table();
     } elsif ($target eq 'tex') {
 	$result .= '}';
     }
@@ -101,10 +120,10 @@ sub start_numericalhint {
 		&Apache::loncommon::help_open_topic('Physical_Units');
 	    $result.=&Apache::edit::text_arg('Format:','format',$token,4).
 		&Apache::loncommon::help_open_topic('Numerical_Response_Format');
-	} elsif ($token->[1] eq 'stringhint') {
-	    $result.=&Apache::edit::select_arg('Type:','type',['cs','ci','mc'],$token);
 	} elsif ($token->[1] eq 'formulahint') {
-	    $result.=&Apache::edit::text_arg('Sample Points:','samples',$token,40);
+	    $result.=&Apache::edit::text_arg('Sample Points:','samples',
+					     $token,40).
+	        &Apache::loncommon::help_open_topic('Formula_Response_Sampling');
 	}
 	$result.=&Apache::edit::end_row();
 	$result.=&Apache::edit::start_spanning_row();
@@ -114,10 +133,6 @@ sub start_numericalhint {
 	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
 						     $safeeval,'name',
 						     'answer','unit','format');
-	} elsif ($token->[1] eq 'stringhint') {
-	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
-						     $safeeval,'name','answer',
-						     'type');
 	} elsif ($token->[1] eq 'formulahint') {
 	    $constructtag=&Apache::edit::get_new_args($token,$parstack,
 						     $safeeval,'name','answer',
@@ -141,53 +156,304 @@ sub end_numericalhint {
 	    &Apache::lonxml::default_homework_load($safeeval);
 	}
 	$safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
-	my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
-	&Apache::response::setup_params('numericalhint');
+	my $hint_name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
+	&Apache::response::setup_params('numericalhint',$safeeval);
+
 	my $partid=$Apache::inputtags::part;
-	my $id=$Apache::inputtags::response['-1'];
+	my $id=$Apache::inputtags::hint[-1];
 	#id submissions occured under
-	my $submitid=$Apache::inputtags::response['-2'];
+	my $submitid=$Apache::inputtags::response[-1];
+
 	my $response = $Apache::lonhomework::history{
 			    "resource.$partid.$submitid.submission"};
 	&Apache::lonxml::debug("hintgroup is using $response<br />\n");
-	#build safe space expression
-	my $expression="&caparesponse_check_list('".$response."','".
-	    $$parstack[$#$parstack];
-	#need to get all possible parms
-	foreach my $key (keys(%Apache::inputtags::params)) {
-	    $expression.= ';my $'. #'
-		$key.'="'.$Apache::inputtags::params{$key}.'"';
-	}
-	$expression.="');";
-	$result = &Apache::run::run($expression,$safeeval);
-	&Apache::lonxml::debug("$expression:result:$result:$Apache::lonxml::curdepth");
-	my ($awards) = split /:/ , $result;
-	my ($ad) = &Apache::inputtags::finalizeawards(split /,/ , $awards);
-	if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') { push (@Apache::hint::which,$name); }
+
+	my @args = ('type','tol','sig','ans_fmt','unit','calc','samples');
+	my $args_ref =
+	    &Apache::caparesponse::setup_capa_args($safeeval,$parstack,
+						   \@args,$response);
+
+	my $hideunit=&Apache::response::get_response_param($partid.'_'.$submitid,'turnoffunit');
+	if (lc($hideunit) eq "yes") { delete($$args_ref{'unit'}); }
+
+	if ($$tagstack[-1] eq 'formulahint') {
+	    $$args_ref{'type'}='fml';
+	} elsif ($$tagstack[-1] eq 'numericalhint') {
+	    $$args_ref{'type'}='float';
+	}
+	&Apache::caparesponse::add_in_tag_answer($parstack,$safeeval);
+	my %answer = &Apache::caparesponse::get_answer();
+	my (@final_awards,@final_msgs,@ans_names);
+	foreach my $ans_name (keys(%answer)) {
+	    &Apache::lonxml::debug(" doing $ans_name with ".join(':',@{ $answer{$ans_name}{'answers'} }));
+	
+	    ${$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=
+		dclone($answer{$ans_name});
+	    &Apache::caparesponse::setup_capa_response($args_ref,$response);
+	    my ($result,@msgs) = 
+		&Apache::run::run("&caparesponse_check_list()",$safeeval);
+	    &Apache::lonxml::debug("checking $ans_name $result with $response");
+	    &Apache::lonxml::debug('msgs are '.join(':',@msgs));
+	    my ($awards)=split(/:/,$result);
+	    my @awards= split(/,/,$awards);
+	    my ($ad, $msg) = 
+		&Apache::inputtags::finalizeawards(\@awards,\@msgs);
+	    push(@final_awards,$ad);
+	    push(@final_msgs,$msg);
+	    push(@ans_names,$ans_name);
+	}
+	my ($ad, $msg, $ans_name) =
+	    &Apache::inputtags::finalizeawards(\@final_awards,
+					       \@final_msgs,
+					       \@ans_names,1);
+	if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') {
+	    push(@Apache::hint::which,$hint_name);	
+	}
 	$result='';
     } elsif ($target eq 'meta') {
 	$result=&Apache::response::meta_package_write($token->[1]);
     } elsif ($target eq 'edit') {
-	$result.='</td></tr>'.&Apache::edit::end_table;
+	$result.=&Apache::edit::end_row().&Apache::edit::end_table();
     }
     &Apache::response::end_hintresponse();
     return $result;
 }
 
-sub start_stringhint {
+sub start_formulahint {
     return &start_numericalhint(@_);
 }
 
-sub end_stringhint {
+sub end_formulahint {
     return &end_numericalhint(@_);
 }
 
-sub start_formulahint {
-    return &start_numericalhint(@_);
+sub start_mathhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    #do everything in end, so intervening <responseparams> and <answer> work
+    &Apache::response::start_hintresponse($parstack,$safeeval);
+    &Apache::lonxml::register('Apache::response',('answer'));
+    my $result;
+    if ($target eq 'edit') {
+        $result.=&Apache::edit::tag_start($target,$token);
+        $result.=&Apache::edit::text_arg('Name:','name',$token);
+        $result.=&Apache::edit::select_arg('Algebra System:',
+                                           'cas',
+                                           ['maxima'],
+                                           $token);
+        $result.=&Apache::edit::text_arg('Argument Array:',
+                                         'args',$token);
+        $result.=&Apache::edit::end_row();
+        $result.=&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+        my $constructtag;
+        $constructtag=&Apache::edit::get_new_args($token,$parstack,
+                                                  $safeeval,'name','cas',
+                                                  'args');
+        $result  = &Apache::edit::rebuild_tag($token);
+        $result .= &Apache::edit::handle_insert();
+    } elsif ($target eq 'web') {
+        &Apache::response::reset_params();
+    }
+    return $result;
 }
 
-sub end_formulahint {
-    return end_numericalhint(@_);
+sub end_mathhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web') {
+        if (!$Apache::lonxml::default_homework_loaded) {
+            &Apache::lonxml::default_homework_load($safeeval);
+        }
+	my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
+        &Apache::response::setup_params('mathhint',$safeeval);
+        my $partid=$Apache::inputtags::part;
+        my $submitid=$Apache::inputtags::response[-1];
+        my $response = $Apache::lonhomework::history{
+                            "resource.$partid.$submitid.submission"};
+	
+	my $cas = &Apache::lonxml::get_param('cas',$parstack,$safeeval);
+	my $award;
+	if ($cas eq 'maxima') {
+	    my $args = [&Apache::lonxml::get_param_var('args',$parstack,$safeeval)];
+	    $award=&Apache::lonmaxima::maxima_run($Apache::response::custom_answer[-1],$response,$args);
+	}
+        if ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS') {
+            push (@Apache::hint::which,$name);
+        }
+        $result='';
+    } elsif ($target eq 'meta') {
+        $result=&Apache::response::meta_package_write($token->[1]);
+    } elsif ($target eq 'edit') {
+        $result.=&Apache::edit::end_row().&Apache::edit::end_table();
+    }
+    pop(@Apache::response::custom_answer);
+    pop(@Apache::response::custom_answer_type);
+    &Apache::response::end_hintresponse();
+    return $result;
+}
+
+sub start_customhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    #do everything in end, so intervening <responseparams> and <answer> work
+    &Apache::response::start_hintresponse($parstack,$safeeval);
+    &Apache::lonxml::register('Apache::response',('answer'));
+    my $result;
+    if ($target eq 'edit') {
+        $result.=&Apache::edit::tag_start($target,$token);
+        $result.=&Apache::edit::text_arg('Name:','name',$token);
+        $result.=&Apache::edit::end_row();
+        $result.=&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+        my $constructtag;
+        $constructtag=&Apache::edit::get_new_args($token,$parstack,
+                                                  $safeeval,'name');
+        $result  = &Apache::edit::rebuild_tag($token);
+        $result .= &Apache::edit::handle_insert();
+    } elsif ($target eq 'web') {
+        &Apache::response::reset_params();
+    }
+    return $result;
+}
+
+sub end_customhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web') {
+        if (!$Apache::lonxml::default_homework_loaded) {
+            &Apache::lonxml::default_homework_load($safeeval);
+        }
+	my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
+        &Apache::response::setup_params('customhint',$safeeval);
+        my $partid=$Apache::inputtags::part;
+        my $submitid=$Apache::inputtags::response[-1];
+        my $response = $Apache::lonhomework::history{
+                            "resource.$partid.$submitid.submission"};
+        my $award;	
+	if ( $response =~ /[^\s]/ && 
+	     $Apache::response::custom_answer_type[-1] eq 'loncapa/perl') {
+	    if (!$Apache::lonxml::default_homework_loaded) {
+		&Apache::lonxml::default_homework_load($safeeval);
+	    }
+	    ${$safeeval->varglob('LONCAPA::customresponse_submission')}=
+		$response;
+	    
+	    $award = &Apache::run::run('{ my $submission=$LONCAPA::customresponse_submission;'.$Apache::response::custom_answer[-1].'}',$safeeval);
+	}
+        if ($award eq 'EXACT_ANS' || $award eq 'APPROX_ANS') {
+            push (@Apache::hint::which,$name);
+        }
+        $result='';
+    } elsif ($target eq 'meta') {
+        $result=&Apache::response::meta_package_write($token->[1]);
+    } elsif ($target eq 'edit') {
+        $result.=&Apache::edit::end_row().&Apache::edit::end_table();
+    }
+    pop(@Apache::response::custom_answer);
+    pop(@Apache::response::custom_answer_type);
+    &Apache::response::end_hintresponse();
+    return $result;
+}
+
+sub start_stringhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    #do everything in end, so intervening <responseparams> work
+    &Apache::response::start_hintresponse($parstack,$safeeval);
+    my $result;
+    if ($target eq 'edit') {
+	$result.=&Apache::edit::tag_start($target,$token);
+	$result.=&Apache::edit::text_arg('Name:','name',$token);
+	$result.=&Apache::edit::text_arg('Answer:','answer',$token);
+	$result.=&Apache::edit::select_arg('Type:','type',
+			 [['cs','Case Sensitive'],['ci','Case Insensitive'],
+			  ['mc','Case Insensitive, Any Order'],
+			  ['re','Regular Expression']],$token);
+	$result.=&Apache::edit::end_row();
+	$result.=&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag;
+	$constructtag=&Apache::edit::get_new_args($token,$parstack,
+						  $safeeval,'name','answer',
+						  'type');
+	$result  = &Apache::edit::rebuild_tag($token);
+	$result .= &Apache::edit::handle_insert();
+    } elsif ($target eq 'web') {
+	&Apache::response::reset_params();
+    }
+    return $result;
+}
+
+sub end_stringhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web') {
+	if (!$Apache::lonxml::default_homework_loaded) {
+	    &Apache::lonxml::default_homework_load($safeeval);
+	}
+	$safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
+	my $hint_name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
+	&Apache::response::setup_params('stringhint',$safeeval);
+	my $partid=$Apache::inputtags::part;
+	my $id=$Apache::inputtags::hint[-1];
+	#id submissions occured under
+	my $submitid=$Apache::inputtags::response[-1];
+	my $response = $Apache::lonhomework::history{
+			    "resource.$partid.$submitid.submission"};
+	&Apache::lonxml::debug("hintgroup is using $response<br />\n");
+	my $type = &Apache::lonxml::get_param('type',$parstack,$safeeval);
+	my ($ad,$msg);
+	if ($type eq 're' ) {
+	    my $answer=&Apache::lonxml::get_param('answer',$parstack,
+						  $safeeval);
+	    ${$safeeval->varglob('LONCAPA::response')}=$response;
+	    my $compare='=';
+	    if ($answer=~/^\s*NOT\s*/) {
+		$answer=~s/^\s*NOT\s*//;
+		$compare='!';
+	    }
+	    my $test='$LONCAPA::response'.$compare.'~m'.$answer;
+	    &Apache::lonxml::debug("test $test");
+	    $result = &Apache::run::run("return $test",$safeeval);
+	    &Apache::lonxml::debug("current $response");
+	    &Apache::lonxml::debug("current $answer");
+	    $ad = ($result) ? 'APPROX_ANS' : 'INCORRECT';
+	} else { 
+	    my @args = ('type');
+	    my $args_ref = 
+		&Apache::caparesponse::setup_capa_args($safeeval,$parstack,
+						       \@args,$response);
+	    &Apache::caparesponse::add_in_tag_answer($parstack,$safeeval);
+	    my (@final_awards,@final_msgs,@ans_names);
+	    my %answer = &Apache::caparesponse::get_answer();
+	    foreach my $ans_name (keys(%answer)) {
+		&Apache::lonxml::debug(" doing $ans_name with ".join(':',@{ $answer{$ans_name}{'answers'} }));
+		${$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=dclone($answer{$ans_name});
+		my ($result, @msgs)=&Apache::run::run("&caparesponse_check_list()",$safeeval);
+		&Apache::lonxml::debug('msgs are'.join(':',@msgs));
+		my ($awards) = split(/:/,$result);
+		my (@awards) = split(/,/,$awards);
+		($ad,$msg) = 
+		    &Apache::inputtags::finalizeawards(\@awards,\@msgs);
+		push(@final_awards,$ad);
+		push(@final_msgs,$msg);
+		push(@ans_names,$ans_name);
+		&Apache::lonxml::debug("\n<br>result:$result:$Apache::lonxml::curdepth<br>\n");
+	    }
+	    my ($ad, $msg, $ans_name) = 
+		&Apache::inputtags::finalizeawards(\@final_awards,
+						   \@final_msgs,
+						   \@ans_names,1);
+	}
+	if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') { 
+	    push(@Apache::hint::which,$hint_name);
+	}
+	$result='';
+    } elsif ($target eq 'meta') {
+	$result=&Apache::response::meta_package_write($token->[1]);
+    } elsif ($target eq 'edit') {
+	$result.=&Apache::edit::end_row().&Apache::edit::end_table();
+    }
+    &Apache::response::end_hintresponse();
+    return $result;
 }
 
 # a part shows if it is on, if no specific parts are on, then default shows
@@ -206,10 +472,10 @@ sub start_hintpart {
 	    foreach $which (@Apache::hint::which) { if ($which eq $on) { $show = 1; last } }
 	}
 	if (!$show) {
-	    &Apache::lonxml::get_all_text("/hintpart",$parser);
+	    &Apache::lonxml::get_all_text("/hintpart",$parser,$style);
 	}
     } elsif ($target eq 'grade') {
-	&Apache::lonxml::get_all_text("/hintpart",$parser);
+	&Apache::lonxml::get_all_text("/hintpart",$parser,$style);
     } elsif ($target eq 'edit') {
 	$result.= &Apache::edit::tag_start($target,$token);
 	$result.= &Apache::edit::text_arg('On:','on',$token);
@@ -229,7 +495,9 @@ sub start_hintpart {
 sub end_hintpart {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;
-    if ($target eq 'edit') { $result.=&Apache::edit::end_table; }
+    if ($target eq 'edit') {
+	$result.=&Apache::edit::end_row().&Apache::edit::end_table();
+    }
     return $result;
 }
 
@@ -264,12 +532,13 @@ sub end_optionhint {
 	my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
 	my $partid=$Apache::inputtags::part;
 	#id submissions occured under
-	my $submitid=$Apache::inputtags::response['-2'];
+	my $submitid=$Apache::inputtags::response[-1];
 	my $part_id="$partid.$submitid";
 	my %answer;
 	my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
 	if ($answer) {
 	    eval('%answer ='.$answer);
+	    &Apache::lonxml::debug("answwer hash");
 	    &Apache::lonhomework::showhash(%answer);
 	    my $response = $Apache::lonhomework::history{
 				            "resource.$part_id.submission"};
@@ -305,8 +574,9 @@ sub end_optionhint {
 	     ($foilmatch    eq '-1' || $foilmatch    eq '1') ) {
 	    push(@Apache::hint::which,$name);
 	}
-    } elsif ($target eq 'edit') { $result.=&Apache::edit::end_table; }
-    if ($target eq 'edit') { $result.=&Apache::edit::end_table; }
+    } elsif ($target eq 'edit') {
+	$result.=&Apache::edit::end_row().&Apache::edit::end_table();
+    }
     &Apache::response::end_hintresponse();
     return $result;
 }
@@ -343,22 +613,36 @@ sub end_radiobuttonhint {
 	eval('@answer ='.$answer);
 	my $partid=$Apache::inputtags::part;
 	#id submissions occured under
-	my $submitid=$Apache::inputtags::response['-2'];
+	my $submitid=$Apache::inputtags::response[-1];
 	my $part_id="$partid.$submitid";
 	my $response = $Apache::lonhomework::history{
 			    "resource.$part_id.submission"};
 	($response)=&Apache::lonnet::str2hash($response);
-	if ($answer[0] eq 'foil' && $response eq $answer[1]) {
-	    push (@Apache::hint::which,$name);
+	&Apache::lonxml::debug("response is $response");
+	
+	if ($answer[0] eq 'foil') {
+	    shift(@answer);
+	    foreach my $answer (@answer) {
+		if ($response eq $answer) {
+		    push (@Apache::hint::which,$name);
+		    last;
+		}
+	    }
 	} elsif ($answer[0] eq 'concept') {
-	    if (ref($Apache::hint::radiobutton{"$part_id.concept.".$answer[1]})) {
-		my @names=@{ $Apache::hint::radiobutton{"$part_id.concept.".$answer[1]} };
-		if (grep(/^\Q$response\E$/,@names)) {
-		    push(@Apache::hint::which,$name);
+	    shift(@answer);
+	    foreach my $answer (@answer) {
+		if (ref($Apache::hint::radiobutton{"$part_id.concept.".$answer})) {
+		    my @names=@{ $Apache::hint::radiobutton{"$part_id.concept.".$answer} };
+		    if (grep(/^\Q$response\E$/,@names)) {
+			push(@Apache::hint::which,$name);
+			last;
+		    }
 		}
 	    }
 	}
-    } elsif ($target eq 'edit') { $result.=&Apache::edit::end_table; }
+    } elsif ($target eq 'edit') {
+	$result.=&Apache::edit::end_row().&Apache::edit::end_table();
+    }
     &Apache::response::end_hintresponse();
     return $result;
 }
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at 
 root@localhost to inform them of the time this error occurred,
 and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>