--- loncom/homework/hint.pm	2001/02/19 20:32:36	1.8
+++ loncom/homework/hint.pm	2004/03/16 22:24:31	1.53
@@ -1,113 +1,488 @@
+# The LearningOnline Network with CAPA 
+# implements the tags that control the hints
+#
+# $Id: hint.pm,v 1.53 2004/03/16 22:24:31 albertel Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA me&aree 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/
+#
+
 package Apache::hinttags; 
 
 use strict;
-use Apache::lonnet;
+use Apache::lonnet();
 use capa;
+use Apache::lonlocal;
 
-sub BEGIN {
-  &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart','numericalhint'));
+BEGIN {
+    &Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart','numericalhint','stringhint','formulahint','optionhint','radiobuttonhint'));
 }
 
 
 @Apache::hint::which=();
 sub start_hintgroup {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
-  my $skiptoend='1';
-  my $result;
-  
-  if ($target ne 'meta' || $target ne 'grade') {
-    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 '') { $hinttries = 1; }
-    &Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
-    if ( $numtries >= $hinttries ) {
-      $skiptoend='0'; 
-      if ($target eq 'web') {$result='<table bgcolor="#dddddd"><tr><td>';}
-    }	
-  }
-  if ($skiptoend && $target ne 'meta') {
-    &Apache::lonxml::get_all_text("/hintgroup",$$parser[$#$parser]);
-  }
-  @Apache::hint::which=();
-  return $result;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $skiptoend='0';
+    my $result;
+
+    if ($target eq 'web') {
+	my $id=$Apache::inputtags::part;
+	my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
+	if ( $numtries eq '') { $numtries = 0; }
+	my $hinttries=&Apache::response::get_response_param($id,"hinttries",1);
+	&Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
+	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' && $gradestatus =~ /^correct/) ||
+	     ( $numtries < $hinttries) ) {
+	    &Apache::lonxml::debug("Grabbin all");
+	    &Apache::lonxml::get_all_text("/hintgroup",$parser);
+	}
+	&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 when problem Correct:','showoncorrect',[['no',&mt('No')],['yes',&mt('Yes')]]);
+	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
+    } elsif ($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;
 }
 
 sub end_hintgroup {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
-  my $result;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
 
-  if ($target ne 'meta' || $target ne 'grade') {
-    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 '') { $hinttries = 1; }
-    &Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
-    if ( $numtries >= $hinttries ) {
-      if ($target eq 'web') {$result='</td></tr></table>';}
-    }	
-  }
-  @Apache::hint::which='';
-  return $result;
+    if ($target eq 'web') {
+	my $id=$Apache::inputtags::part;
+	my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
+	if ( $numtries eq '') { $numtries = 0; }
+	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' &&
+	    $numtries >= $hinttries && $hinttext =~/\S/) {
+	    $result='<table bgcolor="#dddddd"><tr><td>'.
+		$hinttext.'</td></tr></table>';
+	}
+    } elsif ($target eq 'edit') {
+	$result.=&Apache::edit::end_table();
+    } elsif ($target eq 'tex') {
+	$result .= '}';
+    }
+    @Apache::hint::which=();
+    return $result;
 }
 
 sub start_numericalhint {
-  #do everything in end, so intervening <responseparams> work
+    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);
+	if ($token->[1] eq 'numericalhint') {
+	    $result.=&Apache::edit::text_arg('Unit:','unit',$token,5).
+		&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') {
+	    $result.=&Apache::edit::select_arg('Type:','type',
+			    [['cs','Case Sensitive'],['ci','Case Insensitive'],
+			     ['mc','Case Insensitive, Any Order']],$token);
+	} elsif ($token->[1] eq 'formulahint') {
+	    $result.=&Apache::edit::text_arg('Sample Points:','samples',$token,40);
+	}
+	$result.=&Apache::edit::end_row();
+	$result.=&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag;
+	if ($token->[1] eq '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,
+						     $safeeval,'name','answer',
+						     'samples');
+	}
+	if ($constructtag) {
+	    $result  = &Apache::edit::rebuild_tag($token);
+	    $result .= &Apache::edit::handle_insert();
+	}
+    } elsif ($target eq 'web') {
+	&Apache::response::reset_params();
+    }
+    return $result;
 }
 
 sub end_numericalhint {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
-  my $result;
-  if ($target ne 'meta' && $target ne 'grade') {
-    my $args ='';
-    $safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
-    if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
-    my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
-    my $response = $Apache::lonhomework::history{"resource.$Apache::inputtags::part.$Apache::inputtags::response['-1'].submission"};
-    &Apache::lonxml::debug("hintgroup is using $response<br />\n");
-    my $expression="&caparesponse_check_list('".$response."','".
-      $$parstack[$#$parstack].
-	';my $tol="'.$Apache::inputtags::params{'tol'}.'"'.
-	';my $sig="'.$Apache::inputtags::params{'sig'}.'"'.
-	  "');";
-    $result = &Apache::run::run($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); }
-    $result='';
-  }
-  return $result;
+    my ($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 $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
+	&Apache::response::setup_params('numericalhint',$safeeval);
+	my $partid=$Apache::inputtags::part;
+	my $id=$Apache::inputtags::response['-1'];
+	#id submissions occured under
+	my $submitid=$Apache::inputtags::response['-2'];
+	my $response = $Apache::lonhomework::history{
+			    "resource.$partid.$submitid.submission"};
+	&Apache::lonxml::debug("hintgroup is using $response<br />\n");
+	my $hideunit=&Apache::response::get_response_param($submitid.'_'.$id,
+							   'turnoffunit');
+	my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')};
+	$$args_ref{'response'}=$response;
+	#need to get all possible parms
+	foreach my $arg ('type','tol','sig','ans_fmt','unit','calc',
+			 'samples') {
+	    $$args_ref{$arg}=
+		&Apache::lonxml::get_param($arg,$parstack,$safeeval);
+	}
+	foreach my $key (keys(%Apache::inputtags::params)) {
+	    $$args_ref{$key}=$Apache::inputtags::params{$key};
+	}
+	if (lc($hideunit) eq "yes") { delete($$args_ref{'unit'}); }
+	if ($$tagstack[-1] eq 'formulahint') {
+	    $$args_ref{'type'}='fml';
+	} elsif ($$tagstack[-1] eq 'numericalhint') {
+	    $$args_ref{'type'}='float';
+	}
+	my @answer=&Apache::lonxml::get_param_var('answer',$parstack,$safeeval);
+	&Apache::lonxml::debug('answer is'.join(':',@answer));
+	@{$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=@answer;
+		
+	($result,my @msgs) = &Apache::run::run("&caparesponse_check_list()",
+						$safeeval);
+	&Apache::lonxml::debug('msgs are'.join(':',@msgs));
+	&Apache::lonxml::debug("result:$result:$Apache::lonxml::curdepth");
+	my ($awards)=split(/:/,$result);
+	my (@awards) = split(/,/,$awards);
+	my ($ad, $msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs);
+	if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') { push (@Apache::hint::which,$name); }
+	$result='';
+    } elsif ($target eq 'meta') {
+	$result=&Apache::response::meta_package_write($token->[1]);
+    } elsif ($target eq 'edit') {
+	$result.='</td></tr>'.&Apache::edit::end_table;
+    }
+    &Apache::response::end_hintresponse();
+    return $result;
+}
+
+sub start_formulahint {
+    return &start_numericalhint(@_);
+}
+
+sub end_formulahint {
+    return &end_numericalhint(@_);
+}
+
+sub start_stringhint {
+    my ($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);
+	}
+	my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
+	$safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
+	my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
+	&Apache::response::setup_params('stringhint',$safeeval);
+	my $partid=$Apache::inputtags::part;
+	my $id=$Apache::inputtags::response['-1'];
+	#id submissions occured under
+	my $submitid=$Apache::inputtags::response['-2'];
+	my $response = $Apache::lonhomework::history{
+			    "resource.$partid.$submitid.submission"};
+	&Apache::lonxml::debug("hintgroup is using $response<br />\n");
+	my $args_ref= \%{$safeeval->varglob('LONCAPA::CAPAresponse_args')};
+	$$args_ref{'response'}=$response;
+	my $type=$$args_ref{'type'}=&Apache::lonxml::get_param('type',$parstack,$safeeval);
+	my ($ad,$msg);
+	if ($type eq 're' ) {
+	    ${$safeeval->varglob('LONCAPA::response')}=$response;
+	    $result = &Apache::run::run('return $LONCAPA::response=~m'.$answer,$safeeval);
+	    &Apache::lonxml::debug("current $response");
+	    &Apache::lonxml::debug("current $answer");
+	    $ad = ($result) ? 'APPROX_ANS' : 'INCORRECT';
+	} else { 
+	    foreach my $key (keys(%Apache::inputtags::params)) {
+		$$args_ref{$key}=$Apache::inputtags::params{$key};
+	    }
+	    &Apache::lonxml::debug('answer is'.$answer);
+	    @{$safeeval->varglob('LONCAPA::CAPAresponse_answer')}=($answer);
+	    
+	    ($result,my @msgs)=&Apache::run::run("&caparesponse_check_list()",
+						   $safeeval);
+	    &Apache::lonxml::debug('msgs are'.join(':',@msgs));
+	    &Apache::lonxml::debug("result:$result:$Apache::lonxml::curdepth");
+	    my ($awards)=split(/:/,$result);
+	    my (@awards) = split(/,/,$awards);
+	    ($ad, $msg) = &Apache::inputtags::finalizeawards(\@awards,\@msgs);
+	}
+	if ($ad eq 'EXACT_ANS' || $ad eq 'APPROX_ANS') { 
+	    push (@Apache::hint::which,$name);
+	}
+	$result='';
+    } elsif ($target eq 'meta') {
+	$result=&Apache::response::meta_package_write($token->[1]);
+    } elsif ($target eq 'edit') {
+	$result.='</td></tr>'.&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
 sub start_hintpart {
-  my ($target,$token,$parstack,$parser,$safeeval,$style)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
-  my $show ='0';
-
-  if ($target ne 'meta' && $target ne 'grade') {
-    my $args ='';
-    if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
-    my $on = &Apache::run::run("{$args;".'return $on}',$safeeval);
-    if ( $on eq 'default' && $#Apache::hint::which == '-1') {
-    } else {
-      my $which;
-      foreach $which (@Apache::hint::which) { if ($which eq $on) { $show = 1; last } }
-    }
-    if (!$show) {
-      &Apache::lonxml::get_all_text("/hintpart",$$parser[$#$parser]);
-    }
-  } else {
-    &Apache::lonxml::get_all_text("/hintpart",$$parser[$#$parser]);
-  }
-  return '';
+    my $show ='0';
+    my $result = '';
+    if ($target eq 'web') {
+	my $on= &Apache::lonxml::get_param('on',$parstack,$safeeval);
+	&Apache::lonxml::debug("hintpart sees $on and ,$#Apache::hint::which");
+	if ( $on eq 'default' && $#Apache::hint::which == '-1') {
+	    $show=1;
+	} else {
+	    my $which;
+	    foreach $which (@Apache::hint::which) { if ($which eq $on) { $show = 1; last } }
+	}
+	if (!$show) {
+	    &Apache::lonxml::get_all_text("/hintpart",$parser);
+	}
+    } elsif ($target eq 'grade') {
+	&Apache::lonxml::get_all_text("/hintpart",$parser);
+    } elsif ($target eq 'edit') {
+	$result.= &Apache::edit::tag_start($target,$token);
+	$result.= &Apache::edit::text_arg('On:','on',$token);
+	$result.= &Apache::edit::end_row();
+	$result.= &Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'on');
+	if ($constructtag) {
+	    $result = &Apache::edit::rebuild_tag($token);
+	    $result.=&Apache::edit::handle_insert();
+	}
+    }
+    return $result;
 }
 
 sub end_hintpart {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    if ($target eq 'edit') { $result.=&Apache::edit::end_table; }
+    return $result;
+}
+
+sub start_optionhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    &Apache::response::start_hintresponse($parstack,$safeeval);
+    if ($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,40);
+	$result.=&Apache::edit::text_arg('Concept:','concept',$token,50);
+    } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'name',
+						     'answer','concept');
+	if ($constructtag) {
+	    $result  = &Apache::edit::rebuild_tag($token);
+	    $result .= &Apache::edit::handle_insert();
+	}
+    } elsif ($target eq 'meta') {
+	$result=&Apache::response::meta_package_write('numericalhint');
+    }
+    return $result;
 }
 
+sub end_optionhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    if ($target eq 'web') {
+	my ($foilmatch,$conceptmatch)=(-1,-1);
+	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 $part_id="$partid.$submitid";
+	my %answer;
+	my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
+	if ($answer) {
+	    eval('%answer ='.$answer);
+	    &Apache::lonhomework::showhash(%answer);
+	    my $response = $Apache::lonhomework::history{
+				            "resource.$part_id.submission"};
+	    my %response=&Apache::lonnet::str2hash($response);
+	    &Apache::lonhomework::showhash(%response);
+	    foreach my $foil (keys(%answer)) {
+		$foilmatch=1;
+		if ($answer{$foil} ne $response{$foil}) {$foilmatch=0;last;}
+	    }
+	}
+	my %concept;
+	my $constr=&Apache::lonxml::get_param('concept',$parstack,$safeeval);
+	if ( $constr ) { eval('%concept ='.$constr);	}
+	my $response = $Apache::lonhomework::history{
+					"resource.$part_id.submissiongrading"};
+	my %response=&Apache::lonnet::str2hash($response);
+	foreach my $concept (keys(%concept)) {
+	    my $compare;
+	    if ($concept{$concept} eq 'correct') {$compare=1}else{$compare=0}
+	    $conceptmatch=1;
+	    if (ref($Apache::hint::option{"$part_id.concepts"})) {
+		foreach my $foil (@{ $Apache::hint::option{"$part_id.concept.$concept"} }) {
+		    &Apache::lonxml::debug("compare -$foil- -$response{$foil}-$compare-");
+		    if ( exists($response{$foil}) && 
+			 $response{$foil} ne $compare) {$conceptmatch=0;last;}
+		}
+	    } else {
+		$conceptmatch=0;
+	    }
+	    if ($conceptmatch eq '0') { last; }
+	}
+	if ( ($conceptmatch eq '-1' || $conceptmatch eq '1') &&
+	     ($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; }
+    &Apache::response::end_hintresponse();
+    return $result;
+}
+
+sub start_radiobuttonhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    &Apache::response::start_hintresponse($parstack,$safeeval);
+    if ($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);
+    } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'name',
+						     'answer');
+	if ($constructtag) {
+	    $result  = &Apache::edit::rebuild_tag($token);
+	    $result .= &Apache::edit::handle_insert();
+	}
+    } elsif ($target eq 'meta') {
+	$result=&Apache::response::meta_package_write('numericalhint');
+    }
+    return $result;
+}
+
+sub end_radiobuttonhint {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    if ($target eq 'web') {
+	my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
+	my @answer;
+	my $answer=&Apache::lonxml::get_param('answer',$parstack,$safeeval);
+	eval('@answer ='.$answer);
+	my $partid=$Apache::inputtags::part;
+	#id submissions occured under
+	my $submitid=$Apache::inputtags::response['-2'];
+	my $part_id="$partid.$submitid";
+	my $response = $Apache::lonhomework::history{
+			    "resource.$part_id.submission"};
+	($response)=&Apache::lonnet::str2hash($response);
+	&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') {
+	    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; }
+    &Apache::response::end_hintresponse();
+    return $result;
+}
 1;
 __END__