--- loncom/homework/imageresponse.pm	2001/08/13 21:44:24	1.13
+++ loncom/homework/imageresponse.pm	2008/11/12 20:01:21	1.95
@@ -1,268 +1,930 @@
+#
 # The LearningOnline Network with CAPA
-# iimage click response style
+# image click response style
+#
+# $Id: imageresponse.pm,v 1.95 2008/11/12 20:01:21 jms Exp $
+#
+# Copyright Michigan State University Board of Trustees
+#
+# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
+#
+# LON-CAPA is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# LON-CAPA is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with LON-CAPA; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# /home/httpd/html/adm/gpl.txt
+#
+# http://www.lon-capa.org/
+#
+#FIXME LATER assumes multiple possible submissions but only one is possible 
+#currently
+
+
+=head1 NAME
+
+Apache::imageresponse
+
+=head1 SYNOPSIS
+
+Coordinates the response to clicking an image.
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+=head1 HANDLER SUBROUTINE
+
+
+
+=head1 OTHER SUBROUTINES
+
+=over
+
+=item *
+
+start_imageresponse()
+
+=item *
+
+end_imageresponse()
+
+=item *
+
+start_foilgroup()
+
+=item *
+
+getfoilcounts()
+
+=item *
+
+whichfoils()
+
+=item *
+
+prep_image()
+
+=item *
+
+draw_image()
+
+=item *
+
+displayfoils()
+
+=item *
+
+format_prior_response()
+
+=item *
+
+display_answers()
+
+=item *
+
+clean_up_image()
+
+=item *
+
+gradefoils()
+
+=item *
+
+stringify_submission()
+
+=item *
+
+get_submission()
+
+=item *
+
+end_foilgroup()
+
+=item *
+
+start_conceptgroup()
+
+=item *
+
+end_conceptgroup()
+
+=item *
+
+insert_foil()
+
+=item *
+
+start_foil()
+
+=item *
+
+end_foil()
+
+=item *
+
+start_text()
+
+=item *
+
+end_text()
+
+=item *
+
+start_image()
+
+
+=item *
+
+end_image()
+
+=item *
+
+start_rectangle()
+
+=item *
+
+grade_rectangle()
+
+=item *
+
+end_rectangle()
+
+=item *
+
+start_polygon()
+
+=item *
+
+grade_polygon()
+
+=item *
+
+end_polygon()
+
+=back
+
+=cut
 
-#FIXME assumes multiple possbile submissions but only one is possible currently
 
 package Apache::imageresponse;
 use strict;
+use Image::Magick();
+use Apache::randomlylabel();
+use Apache::londefdef();
+use Apache::Constants qw(:common :http);
+use Apache::lonlocal;
+use Apache::lonnet;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
+ 
 
-sub BEGIN {
-  &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
+BEGIN {
+    &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
 }
 
 sub start_imageresponse {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  my $result;
-  #when in a radiobutton response use these
-  &Apache::lonxml::register('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
-  push (@Apache::lonxml::namespace,'imageresponse');
-  my $id = &Apache::response::start_response($parstack,$safeeval);
-  if ($target eq 'meta') {
-    $result=&Apache::response::meta_package_write('imageresponse');
-  }
-  return $result;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    #when in a radiobutton response use these
+    &Apache::lonxml::register('Apache::imageresponse',
+			      ('foilgroup','foil','text','image','rectangle',
+			       'polygon','conceptgroup'));
+    push (@Apache::lonxml::namespace,'imageresponse');
+    my $id = &Apache::response::start_response($parstack,$safeeval);
+    undef(%Apache::response::foilnames);
+    if ($target eq 'meta') {
+	$result=&Apache::response::meta_package_write('imageresponse');
+    } elsif ($target eq 'analyze') {
+	my $part_id="$Apache::inputtags::part.$id";
+        $Apache::lonhomework::analyze{"$part_id.type"} = 'imageresponse';
+	push (@{ $Apache::lonhomework::analyze{"parts"} },$part_id);
+	push (@{ $Apache::lonhomework::analyze{"$part_id.bubble_lines"} },
+	      1);
+    } elsif ( $target eq 'edit' ) {
+	$result .= &Apache::edit::tag_start($target,$token).
+	    &Apache::edit::text_arg('Max Number Of Shown Foils:',
+				    'max',$token,'4').
+	    &Apache::edit::end_row().
+	    &Apache::edit::start_spanning_row();
+    } elsif ( $target eq 'modified' ) {
+	my $constructtag=
+	    &Apache::edit::get_new_args($token,$parstack,$safeeval,'max');
+	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
+    }
+    return $result;
 }
 
 sub end_imageresponse {
-  &Apache::response::end_response;
-  pop @Apache::lonxml::namespace;
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+
+    my $part_id     = $Apache::inputtags::part;
+    my $response_id = $Apache::inputtags::response[-1]; 
+
+    pop(@Apache::lonxml::namespace);
+    &Apache::lonxml::deregister('Apache::imageresponse',('foilgroup','foil','text','image','rectangle','conceptgroup'));
+
+    my $result;
+    if ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
+    } elsif ($target eq 'tex'
+	     && $Apache::lonhomework::type eq 'exam') {
+	$result=&Apache::inputtags::exam_score_line($target);
+    }
+
+    undef(%Apache::response::foilnames);
+    
+    if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || 
+	$target eq 'tex' || $target eq 'analyze') {
+	&Apache::lonxml::increment_counter(&Apache::response::repetition(), 
+					   "$part_id.$response_id");
+	if ($target eq 'analyze') {
+	    &Apache::lonhomework::set_bubble_lines();
+	}
+	
+    }
+    &Apache::response::end_response();
+
+    return $result;
 }
 
-%Apache::response::foilgroup={};
+%Apache::response::foilgroup=();
 sub start_foilgroup {
-  %Apache::response::foilgroup={};
-  $Apache::imageresponse::conceptgroup=0;
-  &Apache::response::setrandomnumber();
-  return '';
+    %Apache::response::foilgroup=();
+    $Apache::imageresponse::conceptgroup=0;
+    &Apache::response::pushrandomnumber();
+    return '';
 }
 
 sub getfoilcounts {
-  my ($parstack,$safeeval)=@_;
+    my ($parstack,$safeeval)=@_;
 
-  my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
-  # +1 since instructors will count from 1
-  my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
-  return ($count,$max);
+    my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
+    # +1 since instructors will count from 1
+    my $count = $#{ $Apache::response::foilgroup{'names'} }+1;
+    if (&Apache::response::showallfoils()) { $max=$count; }
+    return ($count,$max);
 }
 
 sub whichfoils {
-  my ($max)=@_;
-  if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
-  my @names = @{ $Apache::response::foilgroup{'names'} };
-  my @whichopt =();
-  while ((($#whichopt+1) < $max) && ($#names > -1)) {
-    &Apache::lonxml::debug("Have $#whichopt max is $max");
-    my $aopt=int(rand($#names+1));
-    &Apache::lonxml::debug("From $#names elms, picking $aopt");
-    $aopt=splice(@names,$aopt,1);
-    &Apache::lonxml::debug("Picked $aopt");
-    push (@whichopt,$aopt);
-  }
-  return @whichopt;
+    my ($max)=@_;
+    return if (!defined(@{ $Apache::response::foilgroup{'names'} }));
+    my @names = @{ $Apache::response::foilgroup{'names'} };
+    my @whichopt;
+    while ((($#whichopt+1) < $max) && ($#names > -1)) {
+	&Apache::lonxml::debug("Have $#whichopt max is $max");
+	my $aopt;
+	if (&Apache::response::showallfoils()) {
+	    $aopt=0;
+	} else {
+	    $aopt=int(&Math::Random::random_uniform() * ($#names+1));
+	}
+	&Apache::lonxml::debug("From $#names elms, picking $aopt");
+	$aopt=splice(@names,$aopt,1);
+	&Apache::lonxml::debug("Picked $aopt");
+	push(@whichopt,$aopt);
+    }
+    return @whichopt;
+}
+
+sub prep_image {
+    my ($image,$mode,$name)=@_;
+
+    my ($x,$y)= &get_submission($name);
+    &Apache::lonxml::debug("for $name drawing click at $x and $y");
+    &draw_image($mode,$image,$x,$y,$Apache::response::foilgroup{"$name.area"});
+}
+
+sub draw_image {
+    my ($mode,$image,$x,$y,$areas) = @_;
+
+    my $id=&Apache::loncommon::get_cgi_id();
+
+    my (%x,$i);
+    $x{"cgi.$id.BGIMG"}=&escape($image);
+
+    #draws 2 xs on the image at the clicked location
+    #one in white and then one in red on top of the one in white
+
+    if (defined($x)    && $x =~/\S/ 
+	&& defined($y) && $y =~/\S/ 
+	&& ($mode eq 'submission' || !&Apache::response::show_answer())
+	&& $mode ne 'answeronly') {
+	my $length = 6;
+	my $width = 1;
+	my $extrawidth = 2;
+	my $xmin=($x-$length);
+	my $xmax=($x+$length); 
+	my $ymin=($y-$length);
+	my $ymax=($y+$length);
+
+	$x{"cgi.$id.OBJTYPE"}.='LINE:';
+	$i=$x{"cgi.$id.OBJCOUNT"}++;
+	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
+				      "FFFFFF",($width+$extrawidth)));
+	$x{"cgi.$id.OBJTYPE"}.='LINE:';
+	$i=$x{"cgi.$id.OBJCOUNT"}++;
+	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
+				      "FFFFFF",($width+$extrawidth)));
+	$x{"cgi.$id.OBJTYPE"}.='LINE:';
+	$i=$x{"cgi.$id.OBJCOUNT"}++;
+	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymin),($xmax),($ymax),
+				      "FF0000",($width)));
+	$x{"cgi.$id.OBJTYPE"}.='LINE:';
+	$i=$x{"cgi.$id.OBJCOUNT"}++;
+	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
+				      "FF0000",($width)));
+    }
+    if ($mode eq 'answer' || $mode eq 'answeronly') {
+	my $width = 1;
+	my $extrawidth = 2;
+	foreach my $area (@{ $areas }) {
+	    if ($area=~/^rectangle:/) {
+		$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
+		$i=$x{"cgi.$id.OBJCOUNT"}++;
+		my ($x1,$y1,$x2,$y2)=
+		    ($area=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
+		$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"FFFFFF",
+					      ($width+$extrawidth)));
+		$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
+		$i=$x{"cgi.$id.OBJCOUNT"}++;
+		$x{"cgi.$id.OBJ$i"}=join(':',($x1,$y1,$x2,$y2,"00FF00",$width));
+	    } elsif ($area=~/^polygon:(.*)/) {
+		$x{"cgi.$id.OBJTYPE"}.='POLYGON:';
+		$i=$x{"cgi.$id.OBJCOUNT"}++;
+		$x{"cgi.$id.OBJ$i"}=join(':',("FFFFFF",($width+$extrawidth)));
+		$x{"cgi.$id.OBJEXTRA$i"}=$1;
+		$x{"cgi.$id.OBJTYPE"}.='POLYGON:';
+		$i=$x{"cgi.$id.OBJCOUNT"}++;
+		$x{"cgi.$id.OBJ$i"}=join(':',("00FF00",$width));
+		$x{"cgi.$id.OBJEXTRA$i"}=$1;
+	    }
+	}
+    }
+    &Apache::lonnet::appenv(\%x);
+    return $id;
 }
 
 sub displayfoils {
-  my (@whichopt) = @_;
-  my $result ='';
-  my $name;
-  my $temp=1;
-  foreach $name (@whichopt) {
-    $result.=$Apache::response::foilgroup{"$name.text"}."<br />\n";
-    my $image=$Apache::response::foilgroup{"$name.image"};
-    if ($Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"} =~ /^correct/ ) {
-      $result.="<img src=\"$image\"/> <br />\n";
+    my ($target,@whichopt) = @_;
+    my $result ='';
+    my $temp=1;
+    my @images;
+    foreach my $name (@whichopt) {
+	$result.=$Apache::response::foilgroup{"$name.text"};
+	&Apache::lonxml::debug("Text is $result");
+	if ($target eq 'tex') {$result.="\\vskip 0 mm \n";} else {$result.="<br />\n";}
+	my $image=$Apache::response::foilgroup{"$name.image"};
+	&Apache::lonxml::debug("image is $image");
+	if ( ($target eq 'web' || $target eq 'answer') 
+	     && $image !~ /^http:/ ) {
+	    $image=&clean_up_image($image);
+	}
+	push(@images,$image);
+	&Apache::lonxml::debug("image is $image");
+	if ( &Apache::response::show_answer() ) {
+	    if ($target eq 'tex') {
+		$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
+	    } else {
+		my $token=&prep_image($image,'answer',$name);
+		$result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
+	    }
+	} else {
+	    if ($target eq 'tex') {
+		$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
+	    } else {
+		my $respid=$Apache::inputtags::response['-1'];
+		my $token=&prep_image($image,'submission',$name);
+		my $input_id = "HWVAL_$respid:$temp";
+		my $id = $env{'form.request.prefix'}.$input_id;
+		$result.='<img onclick="image_response_click(\''.$id.'\',event);"
+	                       src="/adm/randomlabel.png?token='.$token.'" 
+                               id="'.$id.'_imageresponse"
+                                />'.
+			       '<br />'.
+			       '<input type="hidden" name="'.$input_id.'_token" value="'.$token.'" />'.
+			       '<input type="hidden" name="'.$input_id.'" value="'.
+			       join(':',&get_submission($name)).'" />';
+	    }
+	}
+	$temp++;
+    }
+    if ($target eq 'web') {
+	&Apache::response::setup_prior_tries_hash(\&format_prior_response,
+						  [\@images,\@whichopt]);
+    }
+    return $result;
+}
+
+sub format_prior_response {
+    my ($mode,$answer,$other_data) = @_;
+    
+    my $result;
+
+    # make a copy of the data in the refs
+    my @images = @{ $other_data->[0] };
+    my @foils = @{ $other_data->[1] };
+    foreach my $name (@foils) {
+	my $image = pop(@images);
+	my ($x,$y) = &get_submission($name,$answer);
+	my $token = &draw_image('submission',$image,$x,$y);
+	$result .=
+	    '<img class="LC_prior_image"
+                  src="/adm/randomlabel.png?token='.$token.'" /><br />';
+    }
+    return $result;
+}
+
+sub display_answers {
+    my ($target,$whichopt)=@_;
+
+    my $result=&Apache::response::answer_header('imageresponse');
+    foreach my $name (@$whichopt) {
+	my $image=$Apache::response::foilgroup{"$name.image"};
+	&Apache::lonxml::debug("image is $image");
+	if ( ($target eq 'web' || $target eq 'answer')
+	     && $image !~ /^http:/ ) {
+	    $image = &clean_up_image($image);
+	} 
+	my $token=&prep_image($image,'answeronly',$name);
+
+	$result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n");
+    }
+    $result.=&Apache::response::answer_footer('imageresponse');
+    return $result;
+}
+
+sub clean_up_image {
+    my ($image)=@_;
+    if ($image =~ /\s*<img\s*/) {
+	($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
+	if ($image !~ /^http:/) {
+	    $image=&Apache::lonnet::hreflocation('',$image);
+	}
+	if (!$image) {
+	    $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
+	}
     } else {
-      $result.="<input type=\"image\" name=\"HWVAL_$Apache::inputtags::response['-1']:$temp\" src=\"$image\"/> <br />\n";
+	$image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
+	&Apache::lonxml::debug("repcopying: $image");
+	if (&Apache::lonnet::repcopy($image) ne 'ok') {
+	    $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
+	}
     }
-    $temp++;
-  }
-  return $result;
+    return $image;
 }
 
 sub gradefoils {
-  my (@whichopt) = @_;
-  my $result='';
-  my $x;
-  my $y;
-  my $result;
-  my $id=$Apache::inputtags::response['-1'];
-  my $temp=1;
-  foreach my $name (@whichopt) {
-    $x=$ENV{"form.HWVAL_$id:$temp.x"};
-    $y=$ENV{"form.HWVAL_$id:$temp.y"};
-    &Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
-    if (defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
-      my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
-      my $grade="INCORRECT";
-      foreach my $area (@areas) {
-	&Apache::lonxml::debug("Area is $area for $name");
-	$area =~ m/([a-z]*):/;
-	&Apache::lonxml::debug("Area of type $1");
-	if ($1 eq 'rectangle') {
-	  $grade=&grade_rectangle($area,$x,$y);
+    my (@whichopt) = @_;
+
+    my $partid = $Apache::inputtags::part;
+    my $id     = $Apache::inputtags::response['-1'];
+
+    if ($Apache::lonhomework::type eq 'exam') {
+	&Apache::response::scored_response($partid,$id);
+	return;
+    }
+    
+    my @results;
+    my $temp=1;
+    my %response;
+    foreach my $name (@whichopt) {
+	my ($x,$y) = split(':',$env{"form.HWVAL_$id:$temp"});
+	$response{$name} = $env{"form.HWVAL_$id:$temp"};
+	&Apache::lonxml::debug("Got a x of $x and a y of $y for $name");
+	if (defined($x) && defined($y) &&
+	    defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
+	    my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
+	    my $grade="INCORRECT";
+	    foreach my $area (@areas) {
+		&Apache::lonxml::debug("Area is $area for $name");
+		$area =~ m/([a-z]*):/;
+		&Apache::lonxml::debug("Area of type $1");
+		if ($1 eq 'rectangle') {
+		    $grade=&grade_rectangle($area,$x,$y);
+		} elsif ($1 eq 'polygon') {
+		    $grade=&grade_polygon($area,$x,$y);
+		} else {
+		    &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
+		}
+		&Apache::lonxml::debug("Area said $grade");
+		if ($grade eq 'APPROX_ANS') { last; }
+	    }
+	    &Apache::lonxml::debug("Foil was $grade");
+	    push(@results, $grade)
 	} else {
-	  &Apache::lonxml::error("Unknown area style $area");
+	    push(@results, 'MISSING_ANSWER')
 	}
-	&Apache::lonxml::debug("Area said $grade");
-	if ($grade eq 'APPROX_ANS') { last; }
-      }
-      &Apache::lonxml::debug("Foil was $grade");
-      if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
-      if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
-      &Apache::lonxml::debug("Question is $result");
-      $temp++;
-    }
-  }
-  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
-  $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
-  return '';
+	$temp++;
+    }
+    my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
+    &Apache::lonxml::debug("Question is $result");
+
+    my $part=$Apache::inputtags::part;
+    my %previous=
+	&Apache::response::check_for_previous(&stringify_submission(\%response),
+					      $part,$id);
+    if ($result 
+	&& $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
+    &Apache::response::handle_previous(\%previous,$result);
+    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
+	&stringify_submission(\%response);
+    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
+    return;
+}
+
+sub stringify_submission {
+    my ($response) = @_;
+    return &Apache::lonnet::hash2str(%{ $response });
+
+    
+}
+
+sub get_submission {
+    my ($name,$string) = @_;
+
+    if (!defined($string)) {
+	my $part=$Apache::inputtags::part;
+	my $respid=$Apache::inputtags::response['-1'];
+   	$string = 
+	    $Apache::lonhomework::history{"resource.$part.$respid.submission"};
+    }
+
+    if ($string !~ /=/) {
+	return split(':',$string);
+    } else {
+	my %response = &Apache::lonnet::str2hash($string);
+	return split(':',$response{$name});
+    }
 }
 
 sub end_foilgroup {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  my $result='';
-  my @whichopt;
-  if ($target eq 'web' || $target eq 'grade') {
-    my ($count,$max) = &getfoilcounts($parstack,$safeeval);
-    if ($count>$max) { $count=$max }
-    &Apache::lonxml::debug("Count is $count from $max");
-    @whichopt = &whichfoils($max);
-  }
-  if ($target eq 'web') {
-    $result=&displayfoils(@whichopt);
-  }
-  if ($target eq 'grade') {
-    if ( defined $ENV{'form.submitted'}) {
-      &gradefoils(@whichopt);
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result='';
+    my @whichopt;
+
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
+	$target eq 'analyze' || $target eq 'answer') {
+
+	my ($count,$max) = &getfoilcounts($parstack,$safeeval);
+	if ($count>$max) { $count=$max }
+	&Apache::lonxml::debug("Count is $count from $max");
+
+	@whichopt = &whichfoils($max);
+
+	if ($target eq 'web' || $target eq 'tex') {
+	    $result=&displayfoils($target,@whichopt);
+	    $Apache::lonxml::post_evaluate=0;
+	} elsif ($target eq 'grade') {
+	    if ( defined $env{'form.submitted'}) { &gradefoils(@whichopt); }
+	} elsif ( $target eq 'analyze') {
+	    &Apache::response::analyze_store_foilgroup(\@whichopt,
+						      ['text','image','area']);
+	} elsif ($target eq 'answer'
+		 && $env{'form.answer_output_mode'} ne 'tex') {
+	    $result=&display_answers($target,\@whichopt);
+	}
+
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
     }
-  }
-  return $result;
+    &Apache::response::poprandomnumber();
+    return $result;
 }
 
 sub start_conceptgroup {
-  $Apache::imageresponse::conceptgroup=1;
-  %Apache::response::conceptgroup={};
-  return '';
+    $Apache::imageresponse::conceptgroup=1;
+    %Apache::response::conceptgroup=();
+    return '';
 }
 
 sub end_conceptgroup {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  $Apache::imageresponse::conceptgroup=0;  
-  if ($target eq 'web' || $target eq 'grade') {
-    if (defined(@{ $Apache::response::conceptgroup{'names'} })) {
-      my @names = @{ $Apache::response::conceptgroup{'names'} };
-      my $pick=int(rand($#names+1));
-      my $name=$names[$pick];
-      if (defined(@{ $Apache::response::conceptgroup{"$name.area"} })) {
-	push @{ $Apache::response::foilgroup{'names'} }, $name;
-	$Apache::response::foilgroup{"$name.text"} = $Apache::response::conceptgroup{"$name.text"};
-	$Apache::response::foilgroup{"$name.image"} = $Apache::response::conceptgroup{"$name.image"};
-	push(@{ $Apache::response::foilgroup{"$name.area"} }, @{ $Apache::response::conceptgroup{"$name.area"} });
-	my $concept = &Apache::lonxml::get_param('concept',$parstack,$safeeval);
-	$Apache::response::foilgroup{"$name.concept"} = $concept;
-	&Apache::lonxml::debug("Selecting $name in $concept");
-      }
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    $Apache::imageresponse::conceptgroup=0;
+    my $result;
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
+	$target eq 'analyze') {
+	&Apache::response::pick_foil_for_concept($target,
+						 ['area','text','image'],
+						 \%Apache::hint::image,
+						 $parstack,$safeeval);
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
     }
-  }
-  return '';
+    return $result;
+}
+
+sub insert_foil {
+    return '
+       <foil>
+           <image></image>
+           <text></text>
+           <rectangle></rectangle>
+       </foil>
+';
 }
 
 $Apache::imageresponse::curname='';
 sub start_foil {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  if ($target eq 'web' || $target eq 'grade') {
-    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
-    if ($name eq '') { $name=$Apache::lonxml::curdepth; }
-    if ( $Apache::imageresponse::conceptgroup ) {
-      push(@{ $Apache::response::conceptgroup{'names'} }, $name);
-    } else {
-      push(@{ $Apache::response::foilgroup{'names'} }, $name);
-    }
-    $Apache::imageresponse::curname=$name;
-  }
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
+	$target eq 'analyze' || $target eq 'answer') {
+	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
+	if ($name eq "") {
+	    &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
+	    $name=$Apache::lonxml::curdepth;
+	}
+	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}++;
+	if ( $Apache::imageresponse::conceptgroup
+	     && !&Apache::response::showallfoils()
+	     ) {
+	    push(@{ $Apache::response::conceptgroup{'names'} }, $name);
+	} else {
+	    push(@{ $Apache::response::foilgroup{'names'} }, $name);
+	}
+	$Apache::imageresponse::curname=$name;
+    } elsif ($target eq 'edit') {
+	$result  = &Apache::edit::tag_start($target,$token);
+	$result .= &Apache::edit::text_arg('Name:','name',$token);
+	$result .= &Apache::edit::end_row().
+	    &Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'name');
+	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
+    } 
+    return $result;;
 }
 
 sub end_foil {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
+    }
+    return $result;
 }
 
 sub start_text {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  if ($target eq 'web') { &Apache::lonxml::startredirection; }
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result='';
+    if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
+	|| $target eq 'answer') { 
+	&Apache::lonxml::startredirection; 
+    } elsif ($target eq 'edit') {
+	my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
+	$result=&Apache::edit::tag_start($target,$token,'Task Description').
+	    &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
+	    &Apache::edit::end_row();
+    } elsif ($target eq "modified") {
+	$result=$token->[4].&Apache::edit::modifiedfield('/text',$parser);
+    }
+    return $result;
 }
 
 sub end_text {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  if ($target eq 'web') {
-    my $name = $Apache::imageresponse::curname;
-    if ( $Apache::imageresponse::conceptgroup ) {
-      $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
-    } else {
-      $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
+	|| $target eq 'answer') {
+	my $name = $Apache::imageresponse::curname;
+	if ( $Apache::imageresponse::conceptgroup
+	     && !&Apache::response::showallfoils()
+	     ) {
+	    $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
+	} else {
+	    $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
+	}
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
     }
-  }
-  return '';
+    return $result;
 }
 
 sub start_image {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  if ($target eq 'web') { &Apache::lonxml::startredirection; }
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result='';
+    my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
+    if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze'
+	|| $target eq 'answer') { 
+	&Apache::lonxml::startredirection; 
+    } elsif ($target eq 'edit') {
+	my $bgimg=&Apache::lonxml::get_all_text('/image',$parser,$style);
+	$Apache::edit::bgimgsrc=$bgimg;
+	$Apache::edit::bgimgsrcdepth=$Apache::lonxml::curdepth;
+
+	$result=&Apache::edit::tag_start($target,$token,'Clickable Image').
+	    &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40);
+	$result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
+	$result.=&Apache::edit::search(undef,'textnode').
+	    &Apache::edit::end_row();
+    } elsif ($target eq "modified") {
+	$result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
+    }
+    return $result;
 }
 
 sub end_image {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  if ($target eq 'web') {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
     my $name = $Apache::imageresponse::curname;
-    my $image = &Apache::lonxml::endredirection;
-    &Apache::lonxml::debug("out is $image");
-    if ( $Apache::imageresponse::conceptgroup ) {
-      $Apache::response::conceptgroup{"$name.image"} = $image;
-    } else {
-      $Apache::response::foilgroup{"$name.image"} = $image;
-    }
-  }
-  return '';
+    if ($target eq 'web' || $target eq 'answer') {
+	my $image = &Apache::lonxml::endredirection();
+	&Apache::lonxml::debug("original image is $image");
+	if ( $Apache::imageresponse::conceptgroup
+	     && !&Apache::response::showallfoils()
+	     ) {
+	    $Apache::response::conceptgroup{"$name.image"} = $image;
+	} else {
+	    $Apache::response::foilgroup{"$name.image"} = $image;
+	}
+    } elsif ($target eq 'analyze') {
+	my $image = &Apache::lonxml::endredirection();
+	if ( $Apache::imageresponse::conceptgroup
+	     && !&Apache::response::showallfoils()
+	     ) {
+	    $Apache::response::conceptgroup{"$name.image"} = $image;
+	} else {
+	    $Apache::response::foilgroup{"$name.image"} = $image;
+	}
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
+    } elsif ($target eq 'tex') {
+	my $src = &Apache::lonxml::endredirection();
+
+	#  There may be all sorts of whitespace on fore and aft:
+
+	$src =~ s/\s+$//s;
+	$src =~ s/^\s+//s;
+
+	#
+	#  Gnuplot e.g. just generates the latex to put inplace.
+	#
+	my $graphinclude;
+	if ($src =~ /^%DYNAMICIMAGE/) {
+	    # This is needed because the newline is not always passed -> tex.
+	    # At present we don't care about the sizing info.
+
+	    my ($commentline, $restofstuff) = split(/\n/, $src);
+	    $graphinclude = $src;
+	    $graphinclude =~ s/^$commentline//;
+	} else {
+	    my ($path,$file) = &Apache::londefdef::get_eps_image($src);
+	    my ($height_param,$width_param)=
+		&Apache::londefdef::image_size($src,0.3,$parstack,$safeeval);
+	    $graphinclude = '\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'}';
+	}
+	$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
+    } 
+    return $result;
 }
 
 sub start_rectangle {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  if ($target eq 'web' || $target eq 'grade') { &Apache::lonxml::startredirection; }
-  return '';
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result='';
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
+	$target eq 'analyze' || $target eq 'answer') { 
+	&Apache::lonxml::startredirection; 
+    } elsif ($target eq 'edit') {
+	my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
+	$result=&Apache::edit::tag_start($target,$token,'Rectangle').
+	    &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
+	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
+	    &Apache::edit::end_row();
+    } elsif ($target eq "modified") {
+	&Apache::edit::deletecoorddata();
+	$result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
+    }
+    return $result;
 }
 
 sub grade_rectangle {
-  my ($spec,$x,$y) = @_;
-  &Apache::lonxml::debug("Spec is $spec");
-  $spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/;
-  my $x1=$1;
-  my $y1=$2;
-  my $x2=$3;
-  my $y2=$4;
-  &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
-  if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
-  if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
-  if ($x => $x1) { if ($x <= $x2) { if ($y => $y1) { if ($y <= $y2) { return 'APPROX_ANS'; } } } }
-  return 'INCORRECT';
+    my ($spec,$x,$y) = @_;
+    &Apache::lonxml::debug("Spec is $spec");
+    my ($x1,$y1,$x2,$y2)=($spec=~m/rectangle:\(([0-9]+),([0-9]+)\)\-\(([0-9]+),([0-9]+)\)/);
+    &Apache::lonxml::debug("Point $x1,$y1,$x2,$y2");
+    if ($x1 > $x2) { my $temp=$x1;$x1=$x2;$x2=$temp; }
+    if ($y1 > $y2) { my $temp=$y1;$y1=$y2;$y2=$temp; }
+    if (($x >= $x1) && ($x <= $x2) && ($y >= $y1) && ($y <= $y2)) {
+	return 'APPROX_ANS';
+    }
+    return 'INCORRECT';
 }
 
 sub end_rectangle {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-  if ($target eq 'web' || $target eq 'grade') {
-    my $name = $Apache::imageresponse::curname;
-    my $area = &Apache::lonxml::endredirection;
-    &Apache::lonxml::debug("out is $area for $name");
-    if ( $Apache::imageresponse::conceptgroup ) {
-      push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
+	$target eq 'analyze' || $target eq 'answer') {
+	my $name = $Apache::imageresponse::curname;
+	my $area = &Apache::lonxml::endredirection;
+	$area=~s/\s//g;
+	&Apache::lonxml::debug("out is $area for $name");
+	if ( $Apache::imageresponse::conceptgroup
+	     && !&Apache::response::showallfoils()
+	     ) {
+	    push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
+	} else {
+	    push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
+	}
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
+    }
+    return $result;
+}
+
+sub start_polygon {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result='';
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
+	$target eq 'analyze' || $target eq 'answer') { 
+	&Apache::lonxml::startredirection; 
+    } elsif ($target eq 'edit') {
+	my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
+	$result=&Apache::edit::tag_start($target,$token,'Polygon').
+	    &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
+	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
+	    &Apache::edit::end_row();
+    } elsif ($target eq "modified") {
+	$result=$token->[4].&Apache::edit::modifiedfield('/polygon',$parser);
+    }
+    return $result;
+}
+
+sub grade_polygon {
+    my ($spec,$x,$y) = @_;
+    &Apache::lonxml::debug("Spec is $spec");
+    $spec=~s/^polygon://;
+    my @polygon;
+    foreach my $coord (split('-',$spec)) {
+	my ($x,$y)=($coord=~m/\(([0-9]+),([0-9]+)\)/);
+	&Apache::lonxml::debug("x $x y $y");
+	push @polygon, {'x'=>$x,'y'=>$y};
+    }
+    #make end point start point
+    push @polygon, $polygon[0];
+    # cribbed from
+    # http://geometryalgorithms.com/Archive/algorithm_0103/algorithm_0103.htm
+    my $crossing = 0;    # the crossing number counter
+
+    # loop through all edges of the polygon
+    for (my $i=0; $i<$#polygon; $i++) {    # edge from V[i] to V[i+1]
+	if ((($polygon[$i]->{'y'} <= $y)
+	     && ($polygon[$i+1]->{'y'} > $y))    # an upward crossing
+	    || 
+	    (($polygon[$i]->{'y'} > $y) 
+	     && ($polygon[$i+1]->{'y'} <= $y))) { # a downward crossing
+	    # compute the actual edge-ray intersect x-coordinate
+            my $vt = ($y - $polygon[$i]->{'y'}) 
+		/ ($polygon[$i+1]->{'y'} - $polygon[$i]->{'y'});
+            if ($x < $polygon[$i]->{'x'} + $vt * 
+		($polygon[$i+1]->{'x'} - $polygon[$i]->{'x'})) { # x<intersect
+                $crossing++;   # a valid crossing of y=P.y right of P.x
+	    }
+	}
+    }
+
+    # 0 if even (out), and 1 if odd (in)
+    if ($crossing%2) {
+	return 'APPROX_ANS';
     } else {
-      push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
+	return 'INCORRECT';
+    }
+}
+
+sub end_polygon {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
+	$target eq 'analyze' || $target eq 'answer') {
+	my $name = $Apache::imageresponse::curname;
+	my $area = &Apache::lonxml::endredirection;
+	$area=~s/\s*//g;
+	&Apache::lonxml::debug("out is $area for $name");
+	if ( $Apache::imageresponse::conceptgroup
+	     && !&Apache::response::showallfoils()
+	     ) {
+	    push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
+	} else {
+	    push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";
+	}
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
     }
-  }
-  return '';
+    return $result;
 }
 1;
 __END__