--- loncom/homework/optionresponse.pm	2002/10/28 14:27:27	1.56
+++ loncom/homework/optionresponse.pm	2011/12/15 01:21:28	1.184
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
 # option list style responses
 #
-# $Id: optionresponse.pm,v 1.56 2002/10/28 14:27:27 sakharuk Exp $
+# $Id: optionresponse.pm,v 1.184 2011/12/15 01:21:28 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,11 +25,16 @@
 #
 # http://www.lon-capa.org/
 #
-# 2/21 Guy
-# 01/18 Alex
+
+
+
+
+
 package Apache::optionresponse;
 use strict;
-use Apache::response;
+use Apache::response();
+use Apache::lonlocal;
+use Apache::lonnet;
 
 BEGIN {
   &Apache::lonxml::register('Apache::optionresponse',('optionresponse'));
@@ -39,31 +44,43 @@ sub start_optionresponse {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result='';
   #when in a option response use these
-  &Apache::lonxml::register('Apache::optionresponse',('foilgroup','foil','conceptgroup'));
+  &Apache::lonxml::register('Apache::optionresponse',('foilgroup','foil','conceptgroup','drawoptionlist'));
   push (@Apache::lonxml::namespace,'optionresponse');
   my $id = &Apache::response::start_response($parstack,$safeeval);
+  %Apache::hint::option=();
+  undef(%Apache::response::foilnames);
   if ($target eq 'edit') {
-    $result.=&Apache::edit::start_table($token).
-	"<tr><td>Multiple Option Response Question</td><td>Delete:".
-	&Apache::edit::deletelist($target,$token)
-	."</td><td>&nbsp;".
-        &Apache::edit::end_row().
-        &Apache::edit::start_spanning_row().
-        "\n";
+    $result.=&Apache::edit::start_table($token)
+       .'<tr><td><span class="LC_nobreak">'.&mt('Multiple Option Response Question').'</span> '
+       .&Apache::loncommon::help_open_topic('Option_Response_Problems')."</td>"
+       .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
+       .&Apache::edit::deletelist($target,$token)
+       .'</span></td>'
+       ."<td>&nbsp;"
+       .&Apache::edit::end_row()
+       .&Apache::edit::start_spanning_row()
+       ."\n";
     $result.=&Apache::edit::text_arg('Max Number Of Shown Foils:','max',
 				     $token,'4').
-        &Apache::edit::select_arg('Randomize Foil Order','randomize',
+        &Apache::edit::select_arg('Randomize Foil Order:','randomize',
 				  ['yes','no'],$token).
+        &Apache::edit::select_arg(&mt('Display of options when printed'),'TeXlayout',
+				  [['horizontal','Normal list'],
+				   ['vertical','Listed in a vertical column']],$token).
         &Apache::edit::end_row().&Apache::edit::start_spanning_row();
   } elsif ($target eq 'modified') {
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,
-						 $safeeval,'max','randomize');
+						 $safeeval,'max','randomize',
+						 'TeXlayout');
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
   } elsif ($target eq 'meta') {
     $result=&Apache::response::meta_package_write('optionresponse');
   } elsif ($target eq 'analyze') {
-    my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
+    my $part_id="$Apache::inputtags::part.$id";
+    $Apache::lonhomework::analyze{"$part_id.type"} = 'optionresponse';
     push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
+    push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} }, 1);
+
   }
   return $result;
 }
@@ -72,9 +89,10 @@ sub end_optionresponse {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   &Apache::response::end_response;
   pop @Apache::lonxml::namespace;
-  &Apache::lonxml::deregister('Apache::optionresponse',('foilgroup','foil','conceptgroup'));
+  &Apache::lonxml::deregister('Apache::optionresponse',('foilgroup','foil','conceptgroup','drawoptionlist'));
   my $result;
   if ($target eq 'edit') { $result=&Apache::edit::end_table(); }
+  undef(%Apache::response::foilnames);
   return $result;
 }
 
@@ -85,7 +103,7 @@ sub start_foilgroup {
   my $result='';
   %Apache::response::foilgroup=();
   $Apache::optionresponse::conceptgroup=0;
-  &Apache::response::setrandomnumber();
+  &Apache::response::pushrandomnumber(undef,$target);
   if ($target eq 'edit') {
     my $optionlist="<option></option>\n";
     my $option;
@@ -105,7 +123,24 @@ sub start_foilgroup {
         </td>
         <td>Delete an Option:
 	  <select name="$Apache::lonxml::curdepth.deleteopt">$optionlist</select>
+        </td>
 ENDTABLE
+    $result.= '<td>'.&Apache::edit::checked_arg('Print options:','texoptions',
+					 [ ['nochoice','Don\'t show option list'] ]
+					 ,$token).'</td>';
+    $result.= '<td><label>'.&mt('Two-option checkboxes for:').
+              '<select name="checkboxvalue_'.$Apache::lonxml::curdepth.'">';
+    foreach $option (('',@opt)) {
+       $result.='<option value="'.$option.'"';
+       if ($option eq &Apache::lonxml::get_param('checkboxvalue',$parstack,$safeeval)) {
+          $result.=' selected="selected"';
+       }
+       $result.='>'.$option.'</option>';
+    }
+    $result.='</select></label>';
+    $result.=&Apache::edit::checked_arg('Checkbox options:','checkboxoptions',
+                                         [ ['nochoice','Don\'t show option list'] ]
+                                         ,$token).'</td>';
     $result.= &Apache::edit::end_row();
     $result.= &Apache::edit::start_spanning_row();
     $result.= $insertlist.'<br />';
@@ -114,22 +149,20 @@ ENDTABLE
     my @options;
     my $optchanged=0;
     eval '@options ='.&Apache::lonxml::get_param('options',$parstack,$safeeval);
-    if ($ENV{"form.$Apache::lonxml::curdepth.deleteopt"}) {
-      my $delopt=$ENV{"form.$Apache::lonxml::curdepth.deleteopt"};
+    if ($env{"form.$Apache::lonxml::curdepth.deleteopt"}) {
+      my $delopt=$env{"form.$Apache::lonxml::curdepth.deleteopt"};
       &Apache::lonxml::debug("Deleting :$delopt:");
       splice(@options,$delopt-1,1);
       $optchanged=1;
     }
-    if ($ENV{"form.$Apache::lonxml::curdepth.options"}) {
-      my $newopt = $ENV{"form.$Apache::lonxml::curdepth.options"};
-      if ($options[0]) {
-	push(@options,$newopt);
-      } else {
-	$options[0]=$newopt;
-      }
+    if ($env{"form.$Apache::lonxml::curdepth.options"} ne '') {
+      my $newopt = $env{"form.$Apache::lonxml::curdepth.options"};
+      push(@options,$newopt);
       $optchanged=1;
     }
-    if ($optchanged) {
+    my $rebuildtag = &Apache::edit::get_new_args($token,$parstack,$safeeval,
+						 'texoptions','checkboxvalue','checkboxoptions');
+    if ($optchanged || $rebuildtag ) {
       $result = "<foilgroup options=\"(";
       foreach my $option (@options) {
 	$option=~s/\'/\\\'/g;
@@ -137,11 +170,19 @@ ENDTABLE
 	$result .="'".$option."',";
       }
       chop $result;
-      $result.=')">';
+      $result.=')" ';
+      $result .= 'texoptions="'.$token->[2]{'texoptions'}.'" ';
+      $result .= 'checkboxoptions="'.$token->[2]{'checkboxoptions'}.'" ';
+      $result .= 'checkboxvalue="'.$token->[2]{'checkboxvalue'}.'"';
+      $result .= '>';
     } # else nothing changed so just use the default mechanism
   }
-  if ($target eq 'tex') {
-      $result .= ' \begin{enumerate} ';
+  if ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
+    if($env{'form.pdfFormFields'} ne 'yes') {
+      $result .= ' \begin{itemize} ';
+    } else {
+      $result .= "\\\\";
+    }
   }
   return $result;
 }
@@ -150,82 +191,221 @@ sub end_foilgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
   my $result;
-  if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex' || $target eq 'analyze') {
+  if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
+      $target eq 'tex' || $target eq 'analyze') {
+    my $tex_option_switch=&Apache::lonxml::get_param('texoptions',$parstack,$safeeval);
     my $name;
     my @opt;
     eval '@opt ='.&Apache::lonxml::get_param('options',$parstack,$safeeval);
+    &Apache::lonxml::debug("options:".join(':',@opt));
+
+    my $TeXlayout=&Apache::lonxml::get_param('TeXlayout',$parstack,$safeeval,
+					     -2,0);
+    my $checkboxvalue=&Apache::lonxml::get_param('checkboxvalue',$parstack,$safeeval);
+    my $checkboxchoices=(&Apache::lonxml::get_param('checkboxoptions',$parstack,$safeeval) ne 'nochoice');
+    if ($target eq 'tex' && $tex_option_switch eq 'nochoice') {@opt=();}
     &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,$max,$randomize,@opt);
+      $result.=&displayfoils($target,$max,$randomize,$TeXlayout,$checkboxvalue,$checkboxchoices,$tex_option_switch,@opt);
+      $Apache::lonxml::post_evaluate=0;
     } elsif ( $target eq 'answer') {
       $result.=&displayanswers($max,$randomize,@opt);
+      
     } elsif ( $target eq 'analyze') {
-      my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
-      foreach my $name (@{ $Apache::response::foilgroup{'names'} }) {
-	if (defined($Apache::lonhomework::analyze{"$part_id.foil.value.$name"})) { next; }
-	push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },$name);
-	$Apache::lonhomework::analyze{"$part_id.foil.value.$name"} =
-	  $Apache::response::foilgroup{"$name.value"};
-	$Apache::lonhomework::analyze{"$part_id.foil.text.$name"} =
-	  $Apache::response::foilgroup{"$name.text"};
-      }
-      push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },@opt);
-      push (@{ $Apache::lonhomework::analyze{"$part_id.shown"} },&whichfoils($max,$randomize));
+	my @shown = &whichfoils($max,$randomize);
+	&Apache::response::analyze_store_foilgroup(\@shown,
+						  ['text','value','location']);
+	my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
+	push (@{ $Apache::lonhomework::analyze{"$part_id.options"} },@opt);
     } elsif ( $target eq 'grade') {
-      if ( defined $ENV{'form.submitted'}) {
+
+      if ( &Apache::response::submitted()) {
+
 	my @whichopt = &whichfoils($max,$randomize);
 	my $temp=1;my $name;
 	my %responsehash;
+	my %grade;
 	my $right=0;
 	my $wrong=0;
 	my $ignored=0;
+        my ($numrows,$bubbles_per_row);
+        if ($Apache::lonhomework::scantronmode) {
+            my $numitems = scalar(@opt);
+            ($numrows,$bubbles_per_row) =
+                &Apache::optionresponse::getnumrows($numitems);
+        }
+        if ($numrows < 1) {
+            $numrows = 1;
+        }
 	foreach $name (@whichopt) {
-	  my $response = $ENV{'form.HWVAL_'.$Apache::inputtags::response['-1'].":$temp"};
-	  $responsehash{$name}=$response;
+	  my $response;
+          if ($env{'form.submitted'} eq 'scantron') {
+              if ($numrows > 1) {
+                  my $num = $temp;
+                  my $totalnum;
+                  for (my $i=0; $i<$numrows; $i++) {
+                      my $item = &Apache::response::getresponse($num);
+                      if ($item =~ /^\d+$/) {
+                          $totalnum = $i*$bubbles_per_row + $item;
+                      }
+                      $num ++;
+                  }
+                  if ($totalnum =~ /^\d+$/) {
+                      $response = $opt[$totalnum];
+                  }
+                  $temp += $numrows;
+              } else {
+                  $response=&Apache::response::getresponse($temp);
+                  if ($response=~/\S/) {
+                      $response = $opt[$response];
+                  }
+                  $temp ++;
+              }
+	  } else {
+              $response=&Apache::response::getresponse($temp);
+              $temp ++;
+          }
 	  if ( $response =~ /[^\s]/) {
+	    $responsehash{$name}=$response;
 	    my $value=$Apache::response::foilgroup{$name.'.value'};
 	    &Apache::lonxml::debug("submitted a $response for $value<br />\n");
-	    if ($value eq $response) {$right++;} else {$wrong++;}
+	    if ($value eq $response) {
+		$grade{$name}='1'; $right++;
+	    } else {
+		$grade{$name}='0'; $wrong++;
+	    }
 	  } else {
 	    $ignored++;
 	  }
-	  $temp++;
 	}
 	my $part=$Apache::inputtags::part;
+        my $nonlenient=&grading_is_nonlenient($part);
 	my $id = $Apache::inputtags::response['-1'];
 	my $responsestr=&Apache::lonnet::hash2str(%responsehash);
+	my $gradestr   =&Apache::lonnet::hash2str(%grade);
 	my %previous=&Apache::response::check_for_previous($responsestr,
 							   $part,$id);
 	&Apache::lonxml::debug("Got $right right and $wrong wrong, and $ignored were ignored");
-	my $ad;
-	if ($wrong==0 && $ignored==0) {
-	  $ad='EXACT_ANS';
-	} elsif ($wrong==0 && $right==0) {
-	  #nothing submitted
+	$Apache::lonhomework::results{"resource.$part.$id.submission"}=
+	    $responsestr;
+	$Apache::lonhomework::results{"resource.$part.$id.submissiongrading"}=$gradestr;
+        if ($Apache::lonhomework::type eq 'randomizetry') {
+            $Apache::lonhomework::results{"resource.$part.$id.foilorder"} = &Apache::lonnet::array2str(@whichopt);
+        }
+	if (($Apache::lonhomework::type eq 'survey') ||
+            ($Apache::lonhomework::type eq 'surveycred') ||
+            ($Apache::lonhomework::type eq 'anonsurvey') ||
+            ($Apache::lonhomework::type eq 'anonsurveycred')) {
+	    if ($ignored == 0) {
+                my $ad;
+                if ($Apache::lonhomework::type eq 'anonsurveycred') {
+                    $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS_CREDIT';
+                } elsif ($Apache::lonhomework::type eq 'anonsurvey') {
+                    $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='ANONYMOUS';
+                } elsif ($Apache::lonhomework::type eq 'surveycred') {
+                    $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED_CREDIT';
+                } else {
+		    $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='SUBMITTED';
+                }
+		&Apache::response::handle_previous(\%previous,$ad);
+	    } elsif ($wrong==0 && $right==0) {
+	    } else {
+		my $ad=$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}='MISSING_ANSWER';
+		&Apache::response::handle_previous(\%previous,$ad);
+	    }
+	} elsif ($nonlenient) {
+#
+# Non-lenient mode. All right or all wrong
+#
+	    my $ad;
+	    if ($wrong==0 && $ignored==0) {
+		$ad='EXACT_ANS';
+	    } elsif ($wrong==0 && $right==0) {
+		#nothing submitted
+	    } else {
+		if ($ignored==0) {
+		    $ad='INCORRECT';
+		} else {
+		    $ad='MISSING_ANSWER';
+		}
+	    }
+	    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
+	    &Apache::response::handle_previous(\%previous,$ad);
 	} else {
-	  if ($ignored==0) {
-	    $ad='INCORRECT';
-	  } else {
-	    $ad='MISSING_ANSWER';
-	  }
+#
+# This is lenient mode
+#
+	    my $ad;
+	    if ($wrong==0 && $right==0) {
+		#nothing submitted only assign a score if we 
+		#need to override a previous grade
+		if (defined($Apache::lonhomework::history{"resource.$part.$id.awarddetail"})) {
+		    $ad='ASSIGNED_SCORE';
+		}
+	    } else {
+		$ad='ASSIGNED_SCORE';
+	    }
+	    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$ad;
+	    $Apache::lonhomework::results{"resource.$part.$id.awarded"}=
+		$right/(scalar(@whichopt));
+	    $Apache::lonhomework::results{"resource.$part.$id.numfoils"}=
+		scalar(@whichopt);
 	}
-	$Apache::lonhomework::results{"resource.$part.$id.submission"}=
-	  $responsestr;
-	$Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
-	  $ad;
-	&Apache::response::handle_previous(\%previous,$ad);
       }
     }
+    my $part_id     = $Apache::inputtags::part;
+    my $response_id = $Apache::inputtags::response[-1];
+    my ($numrows,$bubbles_per_row);
+    if (($target eq 'tex') && ($Apache::lonhomework::type eq 'exam')) {
+        ($numrows,$bubbles_per_row) =
+            &Apache::optionresponse::getnumrows(scalar(@opt));
+    }
+    if ($numrows < 1) {
+        $numrows = 1;
+    }
+    my $increment = &getfoilcounts($max) * $numrows;
+    &Apache::lonxml::increment_counter($increment,"$part_id.$response_id");
+    if ($target eq 'analyze') {
+	&Apache::lonhomework::set_bubble_lines();
+    }
+
   } elsif ($target eq 'edit') {
     $result.=&Apache::edit::end_table();
-  }  
-  if ($target eq 'tex') {$result .= '\end{enumerate}';}
+  }
+  if ($target eq 'tex' and $Apache::lonhomework::type ne 'exam') {
+    if($env{'form.pdfFormFields'} ne 'yes') {
+      $result .= '\end{itemize}'; 
+    } else {
+      $result .= "\\\\";
+    }
+  }
+  &Apache::response::poprandomnumber();
   return $result;
 }
 
+sub grading_is_nonlenient {
+    my ($part) = @_;
+# Web mode: we are non-lenient unless told otherwise
+    my $defaultparm = 'off';
+    my $nonlenient = 0;
+# Grading a bubblesheet exam: we are grading lenient unless told otherwise
+    if ($Apache::lonhomework::scantronmode) {
+        $defaultparm = 'on';
+        $nonlenient = 1;
+    }
+    my $lenientparm =
+        &Apache::response::get_response_param($part,'lenient',$defaultparm);
+    if ($lenientparm=~/^0|off|no$/i) {
+        $nonlenient = 1;
+    } elsif ($lenientparm=~/^1|on|yes$/i) {
+        $nonlenient = 0;
+    }
+    return $nonlenient;
+}
+
 sub getfoilcounts {
   my ($max)=@_;
   # +1 since instructors will count from 1
@@ -237,213 +417,413 @@ sub getfoilcounts {
 }
 
 sub whichfoils {
-  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 $aopt;
-    if (&Apache::response::showallfoils() || ($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;
+    my ($max,$randomize)=@_;
+    return &Apache::response::whichorder($max,$randomize,
+					 &Apache::response::showallfoils(),
+					 \%Apache::response::foilgroup);
+}
+
+sub displayanswers {
+    my ($max,$randomize,@opt)=@_;
+    if (!defined(@{ $Apache::response::foilgroup{'names'} })) {return;}
+    my @names = @{ $Apache::response::foilgroup{'names'} };
+    my @whichopt = &whichfoils($max,$randomize);
+    my $result;
+    if ($Apache::lonhomework::type eq 'exam') {
+	my $i = 0;
+	my %opt = map { ($_,$i++) } @opt;
+	
+	$i = 0;
+	my @alphabet = ('A'..'Z');
+	foreach my $name (@whichopt) {
+	    $result.=&Apache::response::answer_header('optionresponse',$i++);
+	    $result.=&Apache::response::answer_part('optionresponse',
+						    $alphabet[$opt{$Apache::response::foilgroup{$name.'.value'}}]);
+	    $result.=&Apache::response::answer_part('optionresponse',
+						    $Apache::response::foilgroup{$name.'.value'});
+	    $result.=&Apache::response::answer_footer('optionresponse');
+	}
     } else {
-	push (@whichopt,$aopt);
+	$result=&Apache::response::answer_header('optionresponse');
+	foreach my $name (@whichopt) {
+	    $result.=&Apache::response::answer_part('optionresponse',
+						    $Apache::response::foilgroup{$name.'.value'});
+	}
+	$result.=&Apache::response::answer_footer('optionresponse');
     }
-  }
-  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 $result;
+}
 
-  return @whichopt;
+sub check_box_opt {
+    my ($target,$checkboxvalue,@opt)=@_;
+# Check if we are in checkbox mode: checkboxvalue specified, on web, only two options.
+# If so, return "checked" value
+    if ($#opt!=1) { return ''; }
+    if ($target ne 'web') { return ''; }
+    return $checkboxvalue;
 }
 
-sub displayanswers {
-  my ($max,$randomize,@opt)=@_;
-  my @names = @{ $Apache::response::foilgroup{'names'} };
-  my @whichopt = &whichfoils($max,$randomize);
-  my $result=&Apache::response::answer_header('optionresponse');
-  foreach my $name (@whichopt) {
-    $result.=&Apache::response::answer_part('optionresponse',
-		     $Apache::response::foilgroup{$name.'.value'})
-  }
-  $result.=&Apache::response::answer_footer('optionresponse');
-  return $result;
+sub check_for_invalid {
+    my ($names,$options) = @_;
+    my %bad_names;
+    foreach my $name (@{ $names }) {
+	my $value=$Apache::response::foilgroup{$name.'.value'};
+	my $found=0;
+	foreach my $option (@{ $options }) {
+	    if ($value eq $option) { $found=1; }
+	}
+	if (!$found) { $bad_names{$name}=$value; }
+    }
+    if (%bad_names) {
+	my $error=&mt('The question can not be gotten correct, '.
+	    'the following foils in the &lt;optionresponse&gt; '.
+	    'have invalid correct options').' <br /><tt>'.
+	    join('<br />',(map { $_=&mt("[_1] with value [_2]",$_,$bad_names{$_}) } (keys(%bad_names)))).
+	    "</tt>";
+	&Apache::lonxml::error($error);
+    }
 }
 
 sub displayfoils {
-  my ($target,$max,$randomize,@opt)=@_;
+  my ($target,$max,$randomize,$TeXlayout,$checkboxvalue,$checkboxchoices,
+      $tex_option_switch,@opt)=@_;
+  if (!defined(@{ $Apache::response::foilgroup{'names'} })) {return;}
   my @names = @{ $Apache::response::foilgroup{'names'} };
   my @truelist;
   my @falselist;
-  my $result;
+  my $result;  
   my $name;
-  my $displayoptionintex=0;
-  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 $displayoptionintex=1;
+  my @alphabet = ('A'..'Z');
   my @whichopt = &whichfoils($max,$randomize);
+  unless (($target eq 'tex') && ($tex_option_switch eq 'nochoice')) {
+      &check_for_invalid(\@whichopt,\@opt);
+  }
   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')) {
+  my $break;
+  if ( ($target ne 'tex') &&
+       &Apache::response::show_answer() ) {
+    my $temp=1;
     foreach $name (@whichopt) {
-      if ($target eq 'web') {
-	  $result.="<br />";
-      } elsif ($target eq 'tex') {
-	  $result.='\vskip 0 mm ';
-      }
-      if ($target ne 'tex') {
-	  $result .=$Apache::response::foilgroup{$name.'.value'}.
-	      ":".$Apache::response::foilgroup{$name.'.text'}."\n";
-      } else {
-	  $Apache::response::foilgroup{$name.'.text'}=~s/\\item//;
- 	  $result .='\item \textit{'.$Apache::response::foilgroup{$name.'.value'}.'}'.
-	      ":".$Apache::response::foilgroup{$name.'.text'}."\n";
+	my $text=$Apache::response::foilgroup{$name.'.text'};
+        my $lastresp;
+        unless ((($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') || ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) && (defined($env{'form.grade_symb'}))) {
+            $lastresp = $Apache::lonhomework::history{"resource.$part.$id.submission"};
+        }
+	my %lastresponse=&Apache::lonnet::str2hash($lastresp);
+	my $lastopt=$lastresponse{$name};
+	if ($text!~/^\s*$/) { $break='<br />'; }
+	$result.=$break;
+	if ($target eq 'web') {
+	    my $value=$Apache::response::foilgroup{$name.'.value'};
+	    if (!($text=~s|<drawoptionlist\s*/>|$value|)) {
+		if ($text=~/^\s*$/) {
+		    $text=$value.$text;
+		} else {
+		    $text='<b>'.$value.':</b> '.$text;
+		}
+	    } else {
+                if (@whichopt > 1) {
+                    $text='&#149;'.$text;
+                }
+	    }
+	    $result.=$text."\n";
+	}
+      if ($Apache::lonhomework::type eq 'exam') {
+	  $result.=&webbubbles(\@opt,\@alphabet,$temp,$lastopt);
       }
+      $temp++;
     }
   } else {
     my $temp=1;
-    my %lastresponse=&Apache::lonnet::str2hash($Apache::lonhomework::history{"resource.$part.$id.submission"});
+    my %lastresponse;
+    my $newvariation;
+    if ((($Apache::lonhomework::history{"resource.$part.type"} eq 'randomizetry') ||
+        ($Apache::lonhomework::type eq 'randomizetry')) &&
+        ($Apache::inputtags::status[-1] eq 'CAN_ANSWER')) {
+        if ($env{'form.'.$part.'.rndseed'} ne
+            $Apache::lonhomework::history{"resource.$part.rndseed"}) {
+            $newvariation = 1;
+        }
+    }
+    unless ($newvariation) {
+        %lastresponse=&Apache::lonnet::str2hash($Apache::lonhomework::history{"resource.$part.$id.submission"});
+    }
+    my $internal_counter=$Apache::lonxml::counter;
+    my $checkboxopt=&check_box_opt($target,$checkboxvalue,@opt);
+    if ($checkboxopt) {
+       $result.='<br />'.
+                ($checkboxchoices?&mt('Choices: ').'<b>'.$opt[0].','.$opt[1].'</b>. ':'').
+                 &mt('Select all that are <b>[_1]</b>.',$checkboxopt);
+    }
     foreach $name (@whichopt) {
+      my $text=$Apache::response::foilgroup{$name.'.text'};
+      if ($text!~/^\s*$/) {
+	  if ($target eq 'tex') {
+	      $break='\vskip 0 mm ';
+	  } elsif ($target eq 'web') {
+	      $break='<br />';
+	  }
+      }
       my $lastopt=$lastresponse{$name};
       my $optionlist="<option></option>\n";
-      my $option;
-      foreach $option (@opt) {
-	if ($option eq $lastopt) {
-	  $optionlist.="<option selected=\"on\">$option</option>\n";
-	} else {
-	  $optionlist.="<option>$option</option>\n";
-	}
+
+      if($target eq 'tex' and $env{'form.pdfFormFields'} eq 'yes'
+         && $Apache::inputtags::status[-1] eq 'CAN_ANSWER') {
+          my $fieldname = $env{'request.symb'}.'&part_'.$Apache::inputtags::part.'&optionresponse'.'&HWVAL_'.$Apache::inputtags::response['-1'].':'.$temp;
+          $optionlist =  &Apache::lonxml::print_pdf_start_combobox($fieldname);
+      }
+
+      foreach my $option (@opt) {
+	  my $escopt=&HTML::Entities::encode($option,'\'"&<>');
+          if ($option eq $lastopt) {
+              if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
+                  && $Apache::inputtags::status[-1] eq 'CAN_ANSWER'
+                  && $Apache::lonhomework::type ne 'exam') {
+                  $optionlist .= &Apache::lonxml::print_pdf_add_combobox_option($option);
+              } else {
+                  $optionlist.="<option value='".$escopt."' selected=\"selected\">$option</option>\n";
+              }
+          } else {
+              if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
+                  && $Apache::inputtags::status[-1] eq 'CAN_ANSWER'
+                  && $Apache::lonhomework::type ne 'exam') {
+                  $optionlist .= &Apache::lonxml::print_pdf_add_combobox_option($option);
+              } else {
+                  $optionlist.="<option value='".$escopt."'>$option</option>\n";
+              }
+          }
       }
       if ($target ne 'tex') {
-	  $result.="<br /><select name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\">"
-	      .$optionlist
-		  ."</select>\n".$Apache::response::foilgroup{$name.'.text'}."\n";
+	  if ($Apache::lonhomework::type ne 'exam') {
+# we are on the web, this is not an exam, and the problem can be answered
+              if ($checkboxopt) {
+# generate checkboxes
+                  my $fieldname=$Apache::inputtags::response['-1'].':'.$temp;
+                  my $altopt=$opt[0];
+                  if ($opt[0] eq $checkboxopt) {
+                     $altopt=$opt[1];
+                  }
+                  my $defopt=$lastopt;
+                  unless ($defopt) { $defopt=$altopt; }
+                  my $escdefopt=&HTML::Entities::encode($defopt,'\'"&<>');
+                  my $esccheckboxopt=&HTML::Entities::encode($checkboxopt,'\'"&<>');
+                  my $escaltopt=&HTML::Entities::encode($altopt,'\'"&<>');
+# checkboxopt is how the box is labelled
+# altopt is the alternative option
+# lastopt is what the user submitted before
+# defopt is what the field is going to start out with: either previous choice or altopt
+# fieldname is this input field's name after HWVAL_
+                  $optionlist='<input type="hidden" name="HWVAL_'.$fieldname.'" value="'.$escdefopt.'" />'.
+                  '<input type="checkbox" name="HWCHK_'.$fieldname.'" onclick="javascript:if (this.form.elements[\'HWCHK_'.
+                  $fieldname.'\'].checked) { this.form.elements[\'HWVAL_'.$fieldname.'\'].value=\''.$esccheckboxopt.'\'; } else { this.form.elements[\'HWVAL_'.$fieldname.'\'].value=\''.$escaltopt.'\'; };setSubmittedPart(\''.$part.'\');"'.($defopt eq $checkboxopt?' checked="checked"':'')." />\n";
+              } else {
+# classic selection list
+	          $optionlist='<select onchange="javascript:setSubmittedPart(\''.
+		  $part.'\');" name="HWVAL_'.
+		  $Apache::inputtags::response['-1'].':'.$temp.'">'.
+		  $optionlist."</select>\n";
+              }
+	  } else {
+	      $optionlist='<u>'.('&nbsp;'x10).'</u>';
+	  }
+	  if ($text=~s|<drawoptionlist\s*/>|$optionlist|) {
+	      if ($Apache::lonhomework::type ne 'exam') {
+                  if (@whichopt > 1) {  
+                      $text='&#149;'.$text;
+                  }
+	      }
+	  } else {
+	      if ($Apache::lonhomework::type ne 'exam') {
+		  $text=$optionlist.$text;
+	      }
+	  }
+	  $result.=$break.$text."\n";
 	  if ($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>';
+	      $result.=&webbubbles(\@opt,\@alphabet,$temp,$lastopt);
 	  }
 	  $temp++;
       } else {
-	  if ($displayoptionintex == 0) {
-              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{$name.'.text'};
-	      } else {
-		  if ($Apache::lonhomework::type eq 'exam') {
-		      $result.= $texoptionlist.'\vspace*{-2 mm}\item[\textbf{'.$Apache::lonxml::counter.'}.]'.$Apache::response::foilgroup{$name.'.text'};
-		  } else {
-		      $result.= $texoptionlist.'\vspace*{-2 mm}\item '.$Apache::response::foilgroup{$name.'.text'};
-		  }
-	      }
+	  my $texoptionlist='';
+	  if ($displayoptionintex &&
+	      $Apache::lonhomework::type ne 'exam') {
+	      $texoptionlist = &optionlist_correction($TeXlayout,@opt);
+	  }
+	  if ($text=~/<drawoptionlist\s*\/>/) {
+	      $text=~s|<drawoptionlist\s*\/>| \\makebox\[0\.3in\]\[b\]\{\\hrulefill\} |g;
+	  }
+
+	  if ($text=~m/\\item /) {
 	      if ($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 {
-		  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'};
-		  }
-	      }
+	          $text=~s/\\item/\\vskip 2 mm/;
+	      } elsif ($env{'form.pdfFormFields'} ne 'yes') {
+                  $result.= $texoptionlist.$text;
+              }
+          } else {
 	      if ($Apache::lonhomework::type eq 'exam') {
-		  $result.=&bubbles(\@alphabet,\@opt);
+		  $result.= $texoptionlist.'  '.$text;
+	      } elsif ($env{'form.pdfFormFields'} ne 'yes') {
+		  if ($text=~/\S/) {
+                      $result.= $texoptionlist.'\vspace*{-2 mm}\item '.$text;
+                  } else {
+                      $result.= $texoptionlist;
+                  }
 	      }
 	  }
-      } 
+	  if ($Apache::lonhomework::type eq 'exam') {
+	      $result.='\vskip -1 mm\noindent';
+              my ($numrows,$bubbles_per_row) = &getnumrows(scalar(@opt)); 
+              if ($numrows == 1) {  
+                  $result .= '\textbf{'.$internal_counter.'}. \vskip -3mm';
+              } else {
+                  my $linetext;
+                  for (my $i=0; $i<$numrows; $i++) {
+                      $linetext .= $internal_counter+$i.', ';
+                  }
+                  $linetext =~ s/,\s$//;
+                  $result .= '\small {\textbf{'.$linetext.'}} '.
+                             '\hskip 2 mm {\footnotesize '.
+                             &mt('(Bubble once in [_1] lines)',$numrows).
+                             '} \vskip 1 mm';
+              }
+              $result.= &bubbles(\@alphabet,\@opt,undef,undef,$numrows,
+                                 $bubbles_per_row,$internal_counter).
+                        ' \strut ';
+	      $internal_counter += $numrows;
+	  }
+          if ($target eq 'tex' && $env{'form.pdfFormFields'} eq 'yes'
+              && $Apache::inputtags::status[-1] eq 'CAN_ANSWER'
+              && $Apache::lonhomework::type ne 'exam') {
+              $text =~ s/\\item//m;
+              $result .= " $optionlist ". &Apache::lonxml::print_pdf_end_combobox($text).'\strut \\\\';
+              $temp++;
+          }
+	  $displayoptionintex=0;
+      }
     }
-  } 
-  if ($target ne 'tex') {
-      return $result."<br />";
   }
-  else {
+
+  if ($target eq 'web') {
+      my $data = [\@whichopt,'submissiongrading'];
+      my $questiontype;
+      if ($Apache::lonhomework::type eq 'randomizetry') {
+          $questiontype = $Apache::lonhomework::type,
+      }
+      &Apache::response::setup_prior_tries_hash(\&Apache::rankresponse::format_prior_answer,$data,$questiontype);
+  }
+
+  if ($target ne 'tex') {
+      return $result.$break;
+  } else {
       return $result;
   }
 }
 
 
 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;
-    $texoptionlist =~ s/=/\$=\$/g;
+    my ($TeXlayout,@options) = @_;
+    my $texoptionlist='\\item [] '.&mt('Choices:').' ';
+    if ($TeXlayout eq 'vertical') {$texoptionlist='\\item []';}
+    if (scalar(@options) > 0) {
+	foreach my $option (@options) {
+	    $texoptionlist.='{\bf '.
+		&Apache::lonxml::latex_special_symbols($option).
+		'}';
+	    if ($TeXlayout eq 'vertical') {
+		$texoptionlist.=' \vskip 0 mm ',
+	    } else {
+		$texoptionlist.=', ';
+	    }
+	}
+	$texoptionlist=~s/, $//;
+	if ($TeXlayout ne 'vertical') {$texoptionlist.='.';}
+    } else {
+	if ($TeXlayout ne 'vertical') {$texoptionlist='\\item [] \\vskip -5 mm';}
+    }
     return $texoptionlist;
 }
 
 
-sub bubbles {
+sub webbubbles {
+    my ($ropt,$ralphabet,$temp,$lastopt)=@_;
+    my @opt=@$ropt; 
+    my @alphabet=@$ralphabet;
+    my $result='';
+    my $number_of_bubbles = $#opt + 1;
+    $result.= '<table border="1"><tr>';
+    for (my $ind=0;$ind<$number_of_bubbles;$ind++) {
+	my $checked='';
+	if ($lastopt eq $opt[$ind]) {
+	    $checked=' checked="on" ';
+	}
+	$result.='<td><input type="radio" name="HWVAL_'.
+	    $Apache::inputtags::response['-1'].':'.$temp.
+	    '" value="'.$opt[$ind].'" '.$checked.' />';
+	if ($alphabet[$ind]) {
+	    $result.=$alphabet[$ind].': ';
+	}
+	$result.=$opt[$ind].'</td>';
+    }
+    $result.='</tr></table>';
+    return $result;
+}
+
 
-    my ($ralphabit,$ropt) = @_;
-    my @alphabet = @$ralphabit;
+sub bubbles {
+    my ($ralphabet,$ropt,$response,$max_width,$numrows,$bubbles_per_row,
+        $internal_counter) = @_;
+    my @alphabet = @$ralphabet;
     my @opt = @$ropt;
     my ($result,$head,$line) =('','','');
     my $number_of_bubbles = $#opt + 1;
     my $current_length = 0;
+    my $textwidth;
+    if (defined($max_width)) {
+	$textwidth=$max_width;
+	&Apache::lonxml::debug("Max width passed in: $max_width");
+    } elsif ($env{'form.textwidth'} ne '') {
+	$env{'form.textwidth'}=~/(\d+)/;
+	$textwidth=$1;
+	&Apache::lonxml::debug("Max width from form: $textwidth");
+    } else {
+	$env{'form.textwidth'}=~/(\d*)\.?(\d*)/;
+	$textwidth=$1.'.'.$2;
+	&Apache::lonxml::debug("Max width defaults? $textwidth");
+    }
+    &Apache::lonxml::debug("Final maxwidth: $textwidth");
     for (my $ind=0;$ind<=$number_of_bubbles;$ind++) {
-	$current_length += (length($opt[$ind])+length($alphabet[$ind])+2)*2;
-	if ($current_length<0.9*$ENV{'form.textwidth'} and $ind!=$number_of_bubbles) {
-	    $line.='\hskip -1 mm {\small \textbf{'.$alphabet[$ind].'}}$\bigcirc$\hskip -1 mm & \hskip -3 mm {\small '.$opt[$ind].'} & ';
+        my $item;
+        if ($numrows > 1) {
+            my $num = $internal_counter+int($ind/$bubbles_per_row);
+            my $idx = int($ind % $bubbles_per_row);
+            $item = $num.$alphabet[$idx];
+        } else {
+            $item = $alphabet[$ind];
+        }
+	my $leftmargin;
+	$opt[$ind]=&Apache::lonxml::latex_special_symbols($opt[$ind]);
+	if ($response eq 'rankresponse') {$opt[$ind]='Rank '.$opt[$ind];}
+	if ($ind==0) {$leftmargin=6;} else {$leftmargin=10;}
+
+	$current_length += (length($opt[$ind])+length($item)+4)*2;
+        
+	if ($current_length<($textwidth-$leftmargin) and $ind!=$number_of_bubbles) {
+            
+	    $line.='\hskip 4 mm {\small \textbf{'.$item.'}}$\bigcirc$\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].'} & ';;
+	    $result.='\vskip -1 mm\noindent\setlength{\tabcolsep}{2 mm}\renewcommand{\arraystretch}{1.25}\begin{tabular}{'.$head.'}'.$line.'\\\\\end{tabular}\vskip 0 mm';
+	    $line = '\hskip 4 mm {\small \textbf{'.$item.'}}$\bigcirc$\hskip -1 mm & \hskip -3 mm {\small '.$opt[$ind].'} & ';
 	    $head ='lr';
-	    $current_length = (length($opt[$ind])+length($alphabet[$ind]))*2;
+	    $current_length = (length($opt[$ind])+length($item))*2;
 	}
 
     }
-    &Apache::lonxml::increment_counter();
     return $result;
 }
 
-
 sub start_conceptgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   $Apache::optionresponse::conceptgroup=1;
@@ -465,41 +845,13 @@ sub end_conceptgroup {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   $Apache::optionresponse::conceptgroup=0;
   my $result='';
-  if ($target eq 'web' || $target eq 'grade' || $target eq 'answer'
-      || $target eq 'tex' || $target eq 'analyze') {
+  if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
+      $target eq 'tex' || $target eq 'analyze') {
     #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 $pick=int(&Math::Random::random_uniform() * ($#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 $concept");
-      if ($target eq 'analyze') {
-	my $part_id="$Apache::inputtags::part.$Apache::inputtags::response[-1]";
-        push (@{ $Apache::lonhomework::analyze{"$part_id.concepts"} },
-	      $concept);
-	$Apache::lonhomework::analyze{"$part_id.concept.$concept"}=
-	  $Apache::response::conceptgroup{'names'};
-	foreach my $name (@{ $Apache::response::conceptgroup{'names'} }) {
-	  push (@{ $Apache::lonhomework::analyze{"$part_id.foils"} },
-		$name);
-	  $Apache::lonhomework::analyze{"$part_id.foil.value.$name"} =
-	    $Apache::response::conceptgroup{"$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"};
-	}
-      }
-    }
+      &Apache::response::pick_foil_for_concept($target,
+					       ['value','text','location'],
+					       \%Apache::hint::option,
+					       $parstack,$safeeval);
   } elsif ($target eq 'edit') {
     $result=&Apache::edit::end_table();
   }
@@ -515,7 +867,10 @@ sub start_foil {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $result='';
   if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze' ) {
-    &Apache::lonxml::startredirection;
+      &Apache::lonxml::startredirection;
+      if ($target eq 'analyze') {
+	  &Apache::response::check_if_computed($token,$parstack,$safeeval,'value');
+      }
   } elsif ($target eq 'edit') {
     $result=&Apache::edit::tag_start($target,$token,"Foil");
     my $level='-2';
@@ -544,19 +899,30 @@ sub end_foil {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $text ='';
   my $result = '';
-  if ($target eq 'web' || $target eq 'tex') { 
+  if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
       $text=&Apache::lonxml::endredirection;
-      if ($target eq 'tex') { $text = '\vspace*{-2 mm}\item '.$text; }
+      if ($target eq 'tex') {$text=~s/\\strut\s*\\\\\s*\\strut/\\vskip 0 mm/;}
+      if (($target eq 'tex') and ($Apache::lonhomework::type ne 'exam') and ($text=~/\S/)) {$text = '\vspace*{-2 mm}\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,$safeeval);
+    if ($target eq 'tex' && $Apache::lonhomework::type eq 'exam') {
+	$text='\vskip 5mm $\triangleright$ '.$text;
+    }
     if ($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; }
+      if ($name eq "") {
+	  &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
+	  $name=$Apache::lonxml::curdepth;
+      }
       &Apache::lonxml::debug("Using a name of :$name:");
+      if (defined($Apache::response::foilnames{$name})) {
+	  &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique.",'<b><tt>'.$name.'</tt></b>'));
+      }
+      $Apache::response::foilnames{$name}++;
+      my $location =&Apache::lonxml::get_param('location',$parstack,$safeeval);
       if ( $Apache::optionresponse::conceptgroup
 	   && !&Apache::response::showallfoils() ) {
 	push @{ $Apache::response::conceptgroup{'names'} }, $name;
@@ -577,13 +943,110 @@ sub end_foil {
   return $result;
 }
 
+sub start_drawoptionlist {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    if ($target !~ /^(?:meta|answer|modified|edit)$/) {
+	return $token->[4];
+    }
+}
+
+sub end_drawoptionlist {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    if ($target !~ /^(?:meta|answer|modified|edit)$/) {
+	return $token->[2];
+    }
+}
+
 sub insert_foil {
-  return '
+    return '
 <foil name="" value="unused">
 <startouttext />
 <endouttext />
 </foil>';
 }
+
+sub insert_drawoptionlist {
+    return '<drawoptionlist />';
+}
+
+sub getnumrows {
+    my ($numitems) = @_;
+    my $bubbles_per_row;
+    my $default_numbubbles = 10;
+    if (($env{'form.bubbles_per_row'} =~ /^\d+$/) &&
+        ($env{'form.bubbles_per_row'} > 0)) {
+        $bubbles_per_row = $env{'form.bubbles_per_row'};
+    } else {
+        $bubbles_per_row = $default_numbubbles;
+    }
+    my $numrows = int ($numitems/$bubbles_per_row);
+    if (($numitems % $bubbles_per_row) != 0) {
+        $numrows ++;
+    }
+    return ($numrows,$bubbles_per_row);
+}
+
 1;
 __END__
  
+=head1 NAME
+
+Apache::optionresponse.pm;
+
+=head1 SYNOPSIS
+
+Handles tags associated with showing a list of
+options.
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+=head1 HANDLER SUBROUTINE
+
+start_optionresponse()
+
+=head1 OTHER SUBROUTINES
+
+=over
+
+=item end_optionresponse()
+
+=item start_foilgroup()
+
+=item end_foilgroup()
+
+=item getfoilcounts()
+
+=item displayanswers()
+
+=item check_for_invalid()
+
+=item displayfoils()
+
+=item optionlist_correction()
+
+=item webbubbles()
+
+=item bubbles()
+
+=item start_conceptgroup()
+
+=item end_conceptgroup()
+
+=item insert_conceptgroup()
+
+=item start_foil()
+
+=item end_foil()
+
+=item start_drawoptionlist()
+
+=item end_drawoptionlist()
+
+=item insert_foil()
+
+=item insert_drawoptionlist()
+
+=back
+
+=cut