--- loncom/homework/matchresponse.pm	2003/03/26 18:43:15	1.14
+++ loncom/homework/matchresponse.pm	2003/09/24 18:14:30	1.24
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Full matching style response
 #
-# $Id: matchresponse.pm,v 1.14 2003/03/26 18:43:15 sakharuk Exp $
+# $Id: matchresponse.pm,v 1.24 2003/09/24 18:14:30 sakharuk Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -33,9 +33,6 @@ use HTML::Entities();
 use Math::Random();
 use Apache::optionresponse;
 
-my $flag_for_exam_printing = 1;
-my @Items = ();
-
 BEGIN {
     &Apache::lonxml::register('Apache::matchresponse',('matchresponse'));
 }
@@ -90,6 +87,7 @@ sub start_itemgroup {
     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',
@@ -104,7 +102,7 @@ sub start_itemgroup {
 						     $safeeval,'randomize',
 						     'location');
 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
-    } elsif ($target eq 'web') {
+    } elsif ($target eq 'web' or $target eq 'tex') {
 	$Apache::matchresponse::itemtable{'location'}=
 	    &Apache::lonxml::get_param('location',$parstack,$safeeval);
     }
@@ -115,12 +113,13 @@ sub end_itemgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
 
+    if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
     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)
+	@names=&Apache::response::whichorder($#names+1,$randomize,0,
+					 \%Apache::response::itemgroup);
     }
     my %letter_name_map;
     my %name_letter_map;
@@ -129,10 +128,9 @@ sub end_itemgroup {
     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{'letter_name_map'}=\%letter_name_map;
     $Apache::response::itemgroup{'name_letter_map'}=\%name_letter_map;
     if ($target eq 'web') {
 	my $table='<table>';
@@ -146,18 +144,17 @@ sub end_itemgroup {
 	$table.='</table>';
 	$Apache::matchresponse::itemtable{'display'}=$table;
     } elsif ($target eq 'tex') {
-	my $table=' \\\\\\\\ \begin{tabular}{ll} ';
+	my $table=' \begin{description} ';
 	my $i=0;
 	foreach my $name (@names) {
 	    $Apache::response::itemgroup{$name.'.text'}=~s/\$\$/\$/g;
-	    $table.=' '.$alphabet[$i].' & '.
-		$Apache::response::itemgroup{$name.'.text'}.
-		    ' \\\\ ';
+	    $table.='\item['.$alphabet[$i].'] '.
+		$Apache::response::itemgroup{$name.'.text'};
 	    $i++;
 	}
-	$table.=' \end{tabular} \\\\ ';
+	$table.=' \end{description} \strut ';
 	$Apache::matchresponse::itemtable{'display'}=$table;
-    } elsif ($target eq 'edit') { $result=&Apache::edit::end_table(); }
+    }
     return $result;
 }
 
@@ -250,6 +247,7 @@ sub end_foilgroup {
 	} elsif ( $target eq 'grade') {
 	    &grade_response($max,$randomize);
 	}
+	&Apache::lonxml::increment_counter(&getfoilcounts($max));
     } elsif ($target eq 'edit') {
 	$result=&Apache::edit::end_table();
     }
@@ -260,9 +258,10 @@ sub displayanswers {
     my ($max,$randomize,@opt)=@_;
     if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
     my @names = @{ $Apache::response::foilgroup{'names'} };
-    my @whichfoils = &whichorder(&getfoilcounts($max),$randomize,
-				 &Apache::response::showallfoils(),
-				 \%Apache::response::foilgroup);
+    my @whichfoils = &Apache::response::whichorder(&getfoilcounts($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'} })) {
@@ -281,9 +280,10 @@ sub displayanswers {
 
 sub grade_response {
     my ($max,$randomize)=@_;
-    my (@whichfoils)=&whichorder(&getfoilcounts($max),$randomize,
-				 &Apache::response::showallfoils(),
-				 \%Apache::response::foilgroup);
+    my (@whichfoils)=&Apache::response::whichorder(&getfoilcounts($max),
+						   $randomize,
+				            &Apache::response::showallfoils(),
+				           \%Apache::response::foilgroup);
     if (!defined($ENV{'form.submitted'})) { return; }
     my %responsehash;
     my %grade;
@@ -352,9 +352,10 @@ sub displayfoils {
     my ($target,$max,$randomize)=@_;
     my $result;
     my $question;
-    my (@whichfoils)=&whichorder(&getfoilcounts($max),$randomize,
-				 &Apache::response::showallfoils(),
-				 \%Apache::response::foilgroup);
+    my (@whichfoils)=&Apache::response::whichorder(&getfoilcounts($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];
@@ -368,7 +369,7 @@ sub displayfoils {
 	%name_letter_map=
 	    %{ $Apache::response::itemgroup{'name_letter_map'} };
     }
-    if (($solved =~ /^correct/) || ($status eq  'SHOW_ANSWER')) {
+    if ((($solved =~ /^correct/) || ($status eq  'SHOW_ANSWER')) && ($target ne 'tex')) {
 	foreach my $name (@whichfoils) {
 	    my $text=$Apache::response::foilgroup{$name.'.text'};
 	    my $value=$Apache::response::foilgroup{$name.'.value'};
@@ -387,7 +388,8 @@ sub displayfoils {
 	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;
+	my @used_letters=sort(keys(%letter_name_map));
+	my $internal_counter=$Apache::lonxml::counter;
 	foreach my $name (@whichfoils) {
 	    my $lastopt=$lastresponse{$name};
 	    my $last_letter=$name_letter_map{$lastopt};
@@ -400,32 +402,37 @@ sub displayfoils {
 		}
 	    }
 	    my $option;
-	    foreach $option (sort(keys(%letter_name_map))) {
+	    foreach $option (@used_letters) {
 		if ($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') {
+	    if ($target ne 'tex' && $Apache::lonhomework::type ne 'exam') {
 	        $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 ne 'exam') {
+		    $question.='<br />'.$optionlist.$text."\n";
+		} else {
+		    $question.='<br />'.$text."\n";
+		}
 		if ($Apache::lonhomework::type eq 'exam') {
-		    $question.=&Apache::optionresponse::webbubbles(\@Items_letter,\@Items);
+		    $question.=&Apache::optionresponse::webbubbles(\@used_letters,\@used_letters,$temp);
 		}
 	    } 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 ';
+		    for (my $i=0;$i<=$#used_letters;$i++) {push @emptyItems, ' ';}
+		    $question.='\vskip -2 mm\parbox{\textwidth}{\begin{enumerate}\item[\textbf{'.$internal_counter.'}.]\parbox{\textwidth - 5 mm}{'.&Apache::optionresponse::bubbles(\@used_letters,\@emptyItems).'}\end{enumerate}} \vskip -10 mm \strut ';
+		    $internal_counter++;
 	        } else {
-		    $question.=' \\\\ '.$optionlist.$text."\n";
+		    $question.=' '.$optionlist.$text.'\strut\\\\\strut '."\n";
 		}
             } 
 	    $temp++;
@@ -456,52 +463,6 @@ sub getfoilcounts {
     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,$style)=@_;
@@ -526,7 +487,7 @@ sub end_conceptgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     $Apache::matchresponse::conceptgroup=0;
     my $result='';
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ) {
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
 	#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'} };
@@ -612,7 +573,7 @@ sub end_foil {
 		 && !&Apache::response::showallfoils() ) {
 		push @{ $Apache::response::conceptgroup{'names'} }, $name;
 		$Apache::response::conceptgroup{"$name.value"} = $value;
-		if ($target eq 'tex') {
+		if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
 		    $Apache::response::conceptgroup{"$name.text"} = ' $\triangleright$ '.$text;
 		} else {
 		    $Apache::response::conceptgroup{"$name.text"} = $text;
@@ -621,11 +582,15 @@ sub end_foil {
 	    } 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 $\triangleright$ '.$text;
+		if ($Apache::lonhomework::type eq 'exam') {
+		    if ($target eq 'tex') {
+			$Apache::response::foilgroup{"$name.text"} = '\vskip 5 mm $\triangleright$ '.$text;
+		    } else {
+			$Apache::response::foilgroup{"$name.text"} = $text;
+		    }
 		} else {
 		    if ($target eq 'tex') {
-			$Apache::response::foilgroup{"$name.text"} = ' $\triangleright$ '.$text;
+			$Apache::response::foilgroup{"$name.text"} = $text;
 		    } else {
 			$Apache::response::foilgroup{"$name.text"} = $text;
 		    }