# The LON-CAPA hint handler.
#
# Handles the displaying of hints.
#
# YEAR=2000
# 12/19,12/21 Guy Albertelli
# YEAR=2001
# 1/4,1/5,1/22,2/7,2/19,3/31,4/5,4/10,5/31,6/2 Guy Albertelli
# 8/6 Scott Harrison
package Apache::hinttags;
use strict;
use Apache::lonnet;
use capa;
# ======================================================================= BEGIN
sub BEGIN {
&Apache::lonxml::register('Apache::hinttags',('hintgroup','hintpart',
'numericalhint'));
}
@Apache::hint::which = ();
# ============================================================ Start hint group
sub start_hintgroup {
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 $hinttries = &Apache::lonnet::EXT("resource.$id.hinttries");
if ( $hinttries eq '') { $hinttries = 1; }
&Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
if ( $numtries < $hinttries ) {
$skiptoend = '1';
} else {
if ($target eq 'web') {
$result = '<table bgcolor="#dddddd"><tr><td>';
}
}
}
if ($skiptoend) {
&Apache::lonxml::get_all_text("/hintgroup",$$parser[$#$parser]);
}
@Apache::hint::which = ();
return $result;
}
# ============================================================== End hint group
sub end_hintgroup {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target eq 'web') {
my $id = $Apache::inputtags::part;
my $numtries=$Apache::lonhomework::history{"resource.$id.tries"};
if ( $numtries eq '') { $numtries = 0; }
my $hinttries=&Apache::lonnet::EXT("resource.$id.hinttries");
if ( $hinttries eq '') { $hinttries = 1; }
&Apache::lonxml::debug("found :$id:$numtries:$hinttries:");
if ( $numtries => $hinttries ) {
if ($target eq 'web') {$result = '</td></tr></table>';}
}
}
@Apache::hint::which = '';
return $result;
}
# ======================================================== Start numerical hint
sub start_numericalhint {
#do everything in end, so intervening <responseparams> work
return '';
}
# ========================================================== End numerical hint
sub end_numericalhint {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $result;
if ($target eq 'web') {
$safeeval->share_from('capa',['&caparesponse_capa_check_answer']);
my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
my $response = $Apache::lonhomework::history{'resource.'.
$Apache::inputtags::part.'.'.
$Apache::inputtags::response['-1'].'.submission'};
&Apache::lonxml::debug("hintgroup is using $response<br />\n");
my $expression = "&caparesponse_check_list('".$response."','".
$$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 $result;
}
# ======================================================= Starting part of hint
# a part shows if it is on, if no specific parts are on, then default shows
sub start_hintpart {
my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
my $show ='0';
if ($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",$$parser[$#$parser]);
}
} elsif ($target eq 'grade') {
&Apache::lonxml::get_all_text("/hintpart",$$parser[$#$parser]);
}
return '';
}
# ========================================================= Ending part of hint
sub end_hintpart {
return '';
}
1;
__END__
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