--- loncom/homework/matchresponse.pm	2011/10/07 22:39:59	1.83
+++ loncom/homework/matchresponse.pm	2014/02/27 14:41:34	1.90
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Full matching style response
 #
-# $Id: matchresponse.pm,v 1.83 2011/10/07 22:39:59 raeburn Exp $
+# $Id: matchresponse.pm,v 1.90 2014/02/27 14:41:34 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -34,6 +34,7 @@ use Apache::optionresponse();
 use Apache::lonlocal;
 use Apache::lonnet;
 use Apache::lonxml;
+use POSIX qw(ceil);
 
 BEGIN {
     &Apache::lonxml::register('Apache::matchresponse',('matchresponse'));
@@ -103,20 +104,25 @@ sub start_itemgroup {
     if ($target eq 'edit') {
 	$result=&Apache::edit::tag_start($target,$token);
 	$result.=&Apache::edit::select_arg('Randomize Order:','randomize',
-					   ['yes','no'],$token).' 'x 3;
+					   ['yes','no'],$token);
 	$result.=&Apache::edit::select_arg('Items Display Location:',
 					   'location',
 					   ['top','bottom','left','right'],
-					   $token).' 'x 3;
+					   $token);
 	$result.=&Apache::edit::select_arg('Items Display Direction:',
 					   'direction',
 					   ['vertical','horizontal'],
 					   $token);
+        $result.=&Apache::edit::select_arg('Items Columns:',
+                                           'columns',
+                                           [['','default'],'1','2','3','4'],
+                                            $token);
 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
 						     $safeeval,'randomize',
-						     'location','direction');
+						     'location','direction',
+                                                     'columns');
 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
     } elsif ($target eq 'web' or $target eq 'tex') {
 	$Apache::matchresponse::itemtable{'location'}=
@@ -131,7 +137,11 @@ sub end_itemgroup {
     my $result;
 
     if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
-    if (!defined(@{ $Apache::response::itemgroup{'names'} })) { return; }
+    if (ref($Apache::response::itemgroup{'names'}) eq 'ARRAY') {
+        if(!@{ $Apache::response::itemgroup{'names'} }) { return; }
+    } else {
+        return;
+    }
     my @names=@{ $Apache::response::itemgroup{'names'} };
     my $randomize =&Apache::lonxml::get_param('randomize',$parstack,$safeeval);
     if ($randomize ne 'no' ) {
@@ -154,19 +164,51 @@ sub end_itemgroup {
     $Apache::response::itemgroup{'letter_name_map'}=\%letter_name_map;
     $Apache::response::itemgroup{'name_letter_map'}=\%name_letter_map;
     my $direction=&Apache::lonxml::get_param('direction',$parstack,$safeeval);
+    my $columns=&Apache::lonxml::get_param('columns',$parstack,$safeeval);
+    
+    unless ($columns =~ /^\d+$/) {
+        undef($columns);
+    }
     if ($target eq 'web') {
 	
 	my $table='<br /><table>'; # extra space to match what latex does.
-	my $i=0;
-	if ($direction eq 'horizontal') { $table .='<tr>';}
-	foreach my $name (@names) {
-	    if ($direction ne 'horizontal') { $table.='<tr>'; }
-	    $table.='<td>'.$alphabet[$i].'</td><td>'.
-		$Apache::response::itemgroup{$name.'.text'}.'</td>';
-	    if ($direction ne 'horizontal') { $table.='</tr>'; }
-	    $i++;
-	}
-	if ($direction eq 'horizontal') { $table .='</tr>';}
+        if ((!$columns) || ($columns < 0)) {
+            if ($direction eq 'horizontal') {
+                if (@names > 0) { 
+                    $columns = scalar(@names);
+                } else {
+                    $columns = 1;
+                }
+            } else {
+                $columns = 1;
+            }
+        }
+        my $rows=ceil(scalar(@names)/$columns);
+        my $endloop = $columns*$rows;
+        for (my $i=0; $i<$endloop; $i++) {
+            my $label = '&nbsp;';
+            my $item = '&nbsp;';
+            my $index;
+            if ($direction eq 'horizontal') {
+                $index = $i;
+            } else {
+                $index = ($i % $columns)*$rows+int($i/$columns);
+            }
+            if ($index < scalar(@names)) {
+                $label = $alphabet[$index];
+                $item = $Apache::response::itemgroup{$names[$index].'.text'};
+            }
+            if ($i % $columns == 0) {
+                $table.='<tr>';
+            }
+            $table.= '<td>'.$label.'</td><td>'.$item.'</td>';
+            if ($columns > 1) {
+                $table .= '<td>&nbsp;</td>';
+            }
+            if ( ! (($i+1) % $columns) ) {
+                $table.='</tr>';
+            }
+        }
 	$table.='</table>';
 	$Apache::matchresponse::itemtable{'display'}=$table;
 	$Apache::lonxml::post_evaluate=0;
@@ -220,7 +262,7 @@ sub start_item {
 	$result=&Apache::edit::tag_start($target,$token,"Item");
 	$result.=&Apache::edit::text_arg('Name:','name',$token);
 	if ($randomize ne 'no') {
-	    $result.='&nbsp;'x 3 .
+	    $result.=
                      &Apache::edit::select_arg('Location:','location',
 					       ['random','top','bottom'],
 					       $token);
@@ -345,16 +387,22 @@ sub whichfoils {
 
 sub displayanswers {
     my ($max,$randomize,@opt)=@_;
-    if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
+    if (ref($Apache::response::foilgroup{'names'}) eq 'ARRAY') {
+        if (!@{ $Apache::response::foilgroup{'names'} }) { return; }
+    } else {
+        return;
+    }
     my @names = @{ $Apache::response::foilgroup{'names'} };
     my @whichfoils = &Apache::response::whichorder(&getfoilcounts($max),
 						   $randomize,
 					  &Apache::response::showallfoils(),
 					 \%Apache::response::foilgroup);
     my %name_letter_map;
-    if (defined(%{ $Apache::response::itemgroup{'name_letter_map'} })) {
-	%name_letter_map=
-	    %{ $Apache::response::itemgroup{'name_letter_map'} };
+    if (ref($Apache::response::itemgroup{'name_letter_map'}) eq 'HASH') {
+        if (%{$Apache::response::itemgroup{'name_letter_map'}}) {
+	    %name_letter_map=
+	        %{ $Apache::response::itemgroup{'name_letter_map'} };
+        }
     }
     my $result;
     if ($Apache::lonhomework::type eq 'exam') {
@@ -391,9 +439,11 @@ sub grade_response {
     my %answerhash;
     my ($temp,$right,$wrong,$ignored)=(1,0,0,0);
     my %letter_name_map;
-    if (defined(%{ $Apache::response::itemgroup{'letter_name_map'} })) {
-	%letter_name_map=
-	    %{ $Apache::response::itemgroup{'letter_name_map'} };
+    if (ref($Apache::response::itemgroup{'letter_name_map'}) eq 'HASH') {
+        if (%{$Apache::response::itemgroup{'letter_name_map'}}) {
+	    %letter_name_map=
+	        %{ $Apache::response::itemgroup{'letter_name_map'} };
+        }
     }
     my @items;
     my $numitems = scalar(@{ $Apache::response::itemgroup{'names'} });
@@ -450,7 +500,7 @@ sub grade_response {
 	}
     }
     my $part=$Apache::inputtags::part;
-    my $nonlenient=&Apache::optionresponse::is_nonlenient($part);
+    my $nonlenient=&Apache::optionresponse::grading_is_nonlenient($part);
     my $id = $Apache::inputtags::response['-1'];
     my $responsestr=&Apache::lonnet::hash2str(%responsehash);
     my $itemstr    =&Apache::lonnet::array2str(@items);
@@ -530,7 +580,7 @@ sub format_prior_answer {
     my $output;
     
     foreach my $name (@{ $foil_order }) {
-	my $item=shift(@items);
+	my $item = &HTML::Entities::encode(shift(@items),'<>&"');
 	$output .= '<tr><td>'.$item.'</td></tr>';
     }
     return if (!defined($output));
@@ -564,14 +614,18 @@ sub displayfoils {
     my $part=$Apache::inputtags::part;
     my $solved=$Apache::lonhomework::history{"resource.$part.solved"};
     my %letter_name_map;
-    if (defined(%{ $Apache::response::itemgroup{'letter_name_map'} })) {
-	%letter_name_map=
-	    %{ $Apache::response::itemgroup{'letter_name_map'} };
+    if (ref($Apache::response::itemgroup{'letter_name_map'}) eq 'HASH') {
+        if (%{$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=
-	    %{ $Apache::response::itemgroup{'name_letter_map'} };
+    if (ref($Apache::response::itemgroup{'name_letter_map'}) eq 'HASH') {
+        if (%{$Apache::response::itemgroup{'name_letter_map'}}) {
+	    %name_letter_map=
+	        %{ $Apache::response::itemgroup{'name_letter_map'} };
+        }
     }
     if ( &Apache::response::show_answer() && ($target ne 'tex')) {
 	foreach my $name (@whichfoils) {
@@ -598,9 +652,19 @@ sub displayfoils {
                 $newvariation = 1;
             }
         }
-        unless ((($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') || ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred') && (defined($env{'form.grade_symb'}))) || $newvariation) {
-	    $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};
+        unless ($newvariation) {
+            if ((($env{'form.grade_username'} eq '') && ($env{'form.grade_domain'} eq '')) ||
+                (($env{'form.grade_username'} eq $env{'user.name'}) &&
+                 ($env{'form.grade_domain'} eq $env{'user.domain'}))) {
+                $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};
+            } else {
+                unless (($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') ||
+                        ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) {
+                    $lastresponse=$Apache::lonhomework::history{"resource.$part.$id.submission"};
+                }
+            }
         }
+
 	my %lastresponse=&Apache::lonnet::str2hash($lastresponse);    
 	my @alphabet=('A'..'Z');
 	my @used_letters=sort(keys(%letter_name_map));
@@ -835,8 +899,10 @@ sub start_foil {
 	if ($$tagstack[-2] eq 'conceptgroup') { $level = '-3'; }
 	$result.=&Apache::edit::text_arg('Name:','name',$token);
 	my @names;
-	if (defined(@{ $Apache::response::itemgroup{'names'} })) {
-	    @names=@{ $Apache::response::itemgroup{'names'} };
+	if (ref($Apache::response::itemgroup{'names'}) eq 'ARRAY') {
+            if (@{ $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,