--- loncom/homework/optionresponse.pm	2002/08/26 18:15:22	1.46
+++ loncom/homework/optionresponse.pm	2002/10/17 14:30:40	1.51
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
 # option list style responses
 #
-# $Id: optionresponse.pm,v 1.46 2002/08/26 18:15:22 sakharuk Exp $
+# $Id: optionresponse.pm,v 1.51 2002/10/17 14:30:40 sakharuk Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -50,12 +50,14 @@ sub start_optionresponse {
         &Apache::edit::end_row().
         &Apache::edit::start_spanning_row().
         "\n";
-    $result.=&Apache::edit::text_arg('Max Number Of Shown Foils:','max',$token,'4').
-        &Apache::edit::end_row().
-	&Apache::edit::start_spanning_row();
+    $result.=&Apache::edit::text_arg('Max Number Of Shown Foils:','max',
+				     $token,'4').
+        &Apache::edit::select_arg('Randomize Foil Order','randomize',
+				  ['yes','no'],$token).
+        &Apache::edit::end_row().&Apache::edit::start_spanning_row();
   } elsif ($target eq 'modified') {
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,
-						 $safeeval,'max');
+						 $safeeval,'max','randomize');
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
   } elsif ($target eq 'meta') {
     $result=&Apache::response::meta_package_write('optionresponse');
@@ -150,16 +152,16 @@ sub end_foilgroup {
   my $result;
   if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze') {
     my $name;
-    my ($count,$max) = &getfoilcounts($parstack,$safeeval);
-    if ($count>$max) { $count=$max } 
-    &Apache::lonxml::debug("Count is $count from $max");
     my @opt;
     eval '@opt ='.&Apache::lonxml::get_param('options',$parstack,$safeeval);
     &Apache::lonxml::debug("Options are $#opt");
+    my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
+    my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
+					       $safeeval,'-2');
     if ($target eq 'web' || $target eq 'tex') {
-      $result.=&displayfoils($target,$count,@opt);
+      $result.=&displayfoils($target,$max,$randomize,@opt);
     } elsif ( $target eq 'answer') {
-      $result.=&displayanswers($count,@opt);
+      $result.=&displayanswers($max,$randomize,@opt);
     } elsif ( $target eq 'analyze') {
       my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
       foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
@@ -171,10 +173,10 @@ sub end_foilgroup {
 	  $Apache::response::foilgroup{"$name.text"};
       }
       push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },@opt);
-      push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} },&whichfoils($count));
+      push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} },&whichfoils($max,$randomize));
     } elsif ( $target eq 'grade') {
       if ( defined $ENV{'form.submitted'}) {
-	my @whichopt = &whichfoils($count);
+	my @whichopt = &whichfoils($max,$randomize);
 	my $temp=1;my $name;
 	my %responsehash;
 	my $right=0;
@@ -225,38 +227,67 @@ sub end_foilgroup {
 }
 
 sub getfoilcounts {
-  my ($parstack,$safeeval)=@_;
-  my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
+  my ($max)=@_;
   # +1 since instructors will count from 1
   my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
   if (&Apache::response::showallfoils()) { $max=$count; }
-  return ($count,$max);
+  if ($count>$max) { $count=$max } 
+  &Apache::lonxml::debug("Count is $count from $max");
+  return $count;
 }
 
 sub whichfoils {
-  my ($max)=@_;
+  my ($max,$randomize)=@_;
+  $max = &getfoilcounts($max);
+  &Apache::lonxml::debug("randomize $randomize");
   my @names = @{ $Apache::response::foilgroup{'names'} };
   my @whichopt =();
+  my (%top,@toplist,%bottom,@bottomlist);
+  if (!(&Apache::response::showallfoils() || ($randomize eq 'no'))) {
+      my $current=0;
+      foreach my $name (@names) {
+	  $current++;
+	  if ($Apache::response::foilgroup{$name.'.location'} eq 'top') {
+	      $top{$name}=$current;
+	  } elsif ($Apache::response::foilgroup{$name.'.location'} eq
+		   'bottom') {
+	      $bottom{$name}=$current;
+	  }
+      }
+  }
   while ((($#whichopt+1) < $max) && ($#names > -1)) {
     &Apache::lonxml::debug("Have $#whichopt max is $max");
     my $aopt;
-    if (&Apache::response::showallfoils()) {
+    if (&Apache::response::showallfoils() || ($randomize eq 'no')) {
       $aopt=0;
     } else {
-      $aopt=int(rand($#names+1));
+      $aopt=int(&Math::Random::random_uniform() * ($#names+1));
     }
     &Apache::lonxml::debug("From $#whichopt $max $#names elms, picking $aopt");
     $aopt=splice(@names,$aopt,1);
     &Apache::lonxml::debug("Picked $aopt");
-    push (@whichopt,$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 displayanswers {
-  my ($max,@opt)=@_;
+  my ($max,$randomize,@opt)=@_;
   my @names = @{ $Apache::response::foilgroup{'names'} };
-  my @whichopt = &whichfoils($max);
+  my @whichopt = &whichfoils($max,$randomize);
   my $result=&Apache::response::answer_header('optionresponse');
   foreach my $name (@whichopt) {
     $result.=&Apache::response::answer_part('optionresponse',
@@ -267,14 +298,16 @@ sub displayanswers {
 }
 
 sub displayfoils {
-  my ($target,$max,@opt)=@_;
+  my ($target,$max,$randomize,@opt)=@_;
   my @names = @{ $Apache::response::foilgroup{'names'} };
   my @truelist;
   my @falselist;
   my $result;
   my $name;
   my $displayoptionintex=0;
-  my @whichopt = &whichfoils($max);
+  my @alphabet = ('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
+		  'Q','R','S','T','U','V','W','X','Y','Z');
+  my @whichopt = &whichfoils($max,$randomize);
   my $part=$Apache::inputtags::part;
   my $id=$Apache::inputtags::response[-1];
   if (($Apache::lonhomework::history{"resource.$part.solved"} =~ /^correct/)  || ($Apache::inputtags::status[-1] eq  'SHOW_ANSWER')) {
@@ -310,29 +343,50 @@ sub displayfoils {
 	  $result.="<br /><select name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\">"
 	      .$optionlist
 		  ."</select>\n".$Apache::response::foilgroup{$name.'.text'}."\n";
+	  if ($Apache::lonhomework::type eq 'exam') {
+		  my $number_of_bubbles = $#opt + 1;
+		  $result.= '<table border="1"><tr>';
+		  for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
+		      $result.='<td>'.$alphabet[$ind].': '.$opt[$ind].'</td>';
+		  }
+		  $result.='</tr></table>';
+	  }
 	  $temp++;
       } else {
 	  if ($displayoptionintex == 0) {
-              my $texoptionlist = $optionlist;
-	      $texoptionlist =~ s/<option><\/option>/\\item \[\] The possible answers are:/;
-	      $texoptionlist =~ s/<option>/{\\bf /g;
-	      $texoptionlist =~ s/<option selected="on">/{\\bf /g;
-	      $texoptionlist =~ s/<\/option>/},/g;
-	      $texoptionlist =~ s/,$/\./g;
-	      $texoptionlist =~ s/>/\$>\$/g;
-	      $texoptionlist =~ s/</\$<\$/g;
-	      $texoptionlist =~ s/=/\$=\$/g;
+              my $texoptionlist = &optionlist_correction($optionlist);
+	      if ($Apache::lonhomework::type eq 'exam') {$texoptionlist='';}
 	      if ($Apache::response::foilgroup{$name.'.text'}=~m/\\item /) {
+		  if ($Apache::lonhomework::type eq 'exam') {
+		      $Apache::response::foilgroup{$name.'.text'}=~s/\\item/\\item[\\textbf{$Apache::lonxml::counter}\.]/;
+		  }
 		  $result.= $texoptionlist.$Apache::response::foilgroup{$name.'.text'};
 	      } else {
-		  $result.= $texoptionlist.'\item '.$Apache::response::foilgroup{$name.'.text'};
+		  if ($Apache::lonhomework::type eq 'exam') {
+		      $result.= $texoptionlist.'\item[\textbf{'.$Apache::lonxml::counter.'}.]'.$Apache::response::foilgroup{$name.'.text'};
+		  } else {
+		      $result.= $texoptionlist.'\item '.$Apache::response::foilgroup{$name.'.text'};
+		  }
+	      }
+	      if ($Apache::lonhomework::type eq 'exam') {
+		  $result.=&bubbles(\@alphabet,\@opt);
 	      }
 	      $displayoptionintex=1;
 	  } else {
 	      if ($Apache::response::foilgroup{$name.'.text'}=~m/\\item /) {
+		  if ($Apache::lonhomework::type eq 'exam') {
+		      $Apache::response::foilgroup{$name.'.text'}=~s/\\item/\\item[\\textbf{$Apache::lonxml::counter}\.]/;
+		  }
 		  $result.= $Apache::response::foilgroup{$name.'.text'};
 	      } else {
-		  $result.= '\item '.$Apache::response::foilgroup{$name.'.text'};
+		  if ($Apache::lonhomework::type eq 'exam') {
+		      $result.= '\item[\textbf{'.$Apache::lonxml::counter.'}.]'.$Apache::response::foilgroup{$name.'.text'};
+		  } else {
+		      $result.= '\item '.$Apache::response::foilgroup{$name.'.text'};
+		  }
+	      }
+	      if ($Apache::lonhomework::type eq 'exam') {
+		  $result.=&bubbles(\@alphabet,\@opt);
 	      }
 	  }
       } 
@@ -347,6 +401,51 @@ sub displayfoils {
 }
 
 
+sub optionlist_correction {
+
+    my $texoptionlist = shift;
+    $texoptionlist =~ s/<option><\/option>/\\item \[\] Possible answers are:/;
+    $texoptionlist =~ s/<option>/\{\\bf /g;
+    $texoptionlist =~ s/<option selected="on">/\{\\bf /g;
+    $texoptionlist =~ s/<\/option>/\},/g;
+    $texoptionlist =~ s/,$/\./g;
+    $texoptionlist =~ s/>/\$>\$/g;
+    $texoptionlist =~ s/</\$<\$/g;
+    $texoptionlist =~ s/=/\$=\$/g;
+    return $texoptionlist;
+}
+
+
+sub bubbles {
+
+    my ($ralphabit,$ropt) = @_;
+    my @alphabet = @$ralphabit;
+    my @opt = @$ropt;
+    my ($result,$head,$line) =('','','');
+    my $number_of_bubbles = $#opt + 1;
+    my $current_length = 0;
+    for (my $ind=0;$ind<=$number_of_bubbles;$ind++) {
+	$current_length += (length($opt[$ind])+length($alphabet[$ind])+2)*2;
+	if ($current_length<80 and $ind!=$number_of_bubbles) {
+	    $line.='\hskip -1 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -1 mm & \hskip -3 mm {\small '.$opt[$ind].'} & ';
+	    $head.='lr';
+	} else {
+	    $line=~s/\&\s*$//;
+	    $result.='\vskip -5 mm\begin{tabular}{'.$head.'}\\\\'.$line.'\\\\\end{tabular}';
+	    $line = '\hskip -1 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -1 mm & \hskip -3 mm {\small '.$opt[$ind].'} & ';;
+	    $head ='lr';
+	    $current_length = (length($opt[$ind])+length($alphabet[$ind]))*2;
+	}
+
+    }
+    $Apache::lonxml::counter++;
+    my %moreenv;
+    $moreenv{'form.counter'}=$Apache::lonxml::counter;
+    &Apache::lonnet::appenv(%moreenv);
+    return $result;
+}
+
+
 sub start_conceptgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   $Apache::optionresponse::conceptgroup=1;
@@ -373,13 +472,15 @@ sub end_conceptgroup {
     #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'} };
-      my $pick=int rand $#names+1;
+      my $pick=int(&Math::Random::random_uniform() * ($#names+1));
       my $name=$names[$pick];
       push @{ $Apache::response::foilgroup{'names'} }, $name;
       $Apache::response::foilgroup{"$name.value"} =
 	$Apache::response::conceptgroup{"$name.value"};
       $Apache::response::foilgroup{"$name.text"} =
 	$Apache::response::conceptgroup{"$name.text"};
+      $Apache::response::foilgroup{"$name.location"} =
+	$Apache::response::conceptgroup{"$name.location"};
       my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
       $Apache::response::foilgroup{"$name.concept"} = $concept;
       &Apache::lonxml::debug("Selecting $name in $concept");
@@ -396,6 +497,8 @@ sub end_conceptgroup {
 	    $Apache::response::conceptgroup{"$name.value"};
 	  $Apache::lonhomework::analyze{"$part_id.foil.text.$name"} =
 	    $Apache::response::conceptgroup{"$name.text"};
+	  $Apache::lonhomework::analyze{"$part_id.foil.location.$name"} =
+	    $Apache::response::conceptgroup{"$name.location"};
 	}
       }
     }
@@ -422,10 +525,18 @@ sub start_foil {
     my @opt;
     eval '@opt ='.&Apache::lonxml::get_param('options',$parstack,$safeeval,$level);
     $result.=&Apache::edit::text_arg('Name:','name',$token);
-    $result.= &Apache::edit::select_or_text_arg('Correct Option:','value',['unused',(@opt)],$token,'15');
+    $result.= &Apache::edit::select_or_text_arg('Correct Option:','value',
+					       ['unused',(@opt)],$token,'15');
+    my $randomize=&Apache::lonxml::get_param('randomize',$parstack,
+					     $safeeval,'-3');
+    if ($randomize ne 'no') {
+	$result.=&Apache::edit::select_arg('Location:','location',
+					   ['random','top','bottom'],$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,'value','name');
+    my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
+						 'value','name','location');
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
   } 
   return $result;
@@ -436,13 +547,15 @@ sub end_foil {
   my $text ='';
   my $result = '';
   if ($target eq 'web' || $target eq 'tex') { 
-      $text=&Apache::lonxml::endredirection; 
+      $text=&Apache::lonxml::endredirection;
+      if ($target eq 'tex') { $text = '\item '.$text; }
   }
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' 
       || $target eq 'tex' || $target eq 'analyze') {
     my $value = &Apache::lonxml::get_param('value',$parstack,$safeeval);
     if ($value ne 'unused') {
       my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
+      my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);
       &Apache::lonxml::debug("Got a name of :$name:");
       if (!$name) { $name=$Apache::lonxml::curdepth; }
       &Apache::lonxml::debug("Using a name of :$name:");
@@ -451,14 +564,12 @@ sub end_foil {
 	push @{ $Apache::response::conceptgroup{'names'} }, $name;
 	$Apache::response::conceptgroup{"$name.value"} = $value;
 	$Apache::response::conceptgroup{"$name.text"} = $text;
+	$Apache::response::conceptgroup{"$name.location"} = $location;
       } else {
 	push @{ $Apache::response::foilgroup{'names'} }, $name;
-        if ($target eq 'tex') {
-	    $Apache::response::foilgroup{"$name.text"} = '\item '.$text;
-	} else {
-	    $Apache::response::foilgroup{"$name.value"} = $value;
-	    $Apache::response::foilgroup{"$name.text"} = $text;
-	}
+	$Apache::response::foilgroup{"$name.value"} = $value;
+	$Apache::response::foilgroup{"$name.text"} = $text;
+	$Apache::response::foilgroup{"$name.location"} = $location;
       }
     }
   }