--- loncom/homework/imageresponse.pm	2004/03/15 22:09:52	1.52
+++ loncom/homework/imageresponse.pm	2016/07/01 19:59:15	1.106
@@ -1,8 +1,8 @@
-
+#
 # The LearningOnline Network with CAPA
 # image click response style
 #
-# $Id: imageresponse.pm,v 1.52 2004/03/15 22:09:52 albertel Exp $
+# $Id: imageresponse.pm,v 1.106 2016/07/01 19:59:15 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -29,6 +29,87 @@
 #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 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
+
+
 package Apache::imageresponse;
 use strict;
 use Image::Magick();
@@ -36,6 +117,10 @@ 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;
+ 
 
 BEGIN {
     &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
@@ -55,27 +140,63 @@ sub start_imageresponse {
 	$result=&Apache::response::meta_package_write('imageresponse');
     } elsif ($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 {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-    &Apache::response::end_response;
-    pop @Apache::lonxml::namespace;
+
+    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') { $result=&Apache::edit::end_table(); }
+    if ($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') {
+        my $repetition = &Apache::response::repetition();
+	&Apache::lonxml::increment_counter($repetition, 
+					   "$part_id.$response_id");
+	if ($target eq 'analyze') {
+	    &Apache::lonhomework::set_bubble_lines();
+	}
+	
+    }
+    &Apache::response::end_response();
     return $result;
 }
 
 %Apache::response::foilgroup=();
 sub start_foilgroup {
+    my ($target) = @_;
     %Apache::response::foilgroup=();
     $Apache::imageresponse::conceptgroup=0;
-    &Apache::response::setrandomnumber();
+    &Apache::response::pushrandomnumber(undef,$target);
     return '';
 }
 
@@ -91,9 +212,12 @@ sub getfoilcounts {
 
 sub whichfoils {
     my ($max)=@_;
-    if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
-    my @names = @{ $Apache::response::foilgroup{'names'} };
-    my @whichopt =();
+    my @names;
+    if (ref($Apache::response::foilgroup{'names'}) eq 'ARRAY') {
+        @names = @{ $Apache::response::foilgroup{'names'} };
+    }
+    return if (!@names);
+    my @whichopt;
     while ((($#whichopt+1) < $max) && ($#names > -1)) {
 	&Apache::lonxml::debug("Have $#whichopt max is $max");
 	my $aopt;
@@ -105,22 +229,34 @@ sub whichfoils {
 	&Apache::lonxml::debug("From $#names elms, picking $aopt");
 	$aopt=splice(@names,$aopt,1);
 	&Apache::lonxml::debug("Picked $aopt");
-	push (@whichopt,$aopt);
+	push(@whichopt,$aopt);
     }
     return @whichopt;
 }
 
 sub prep_image {
     my ($image,$mode,$name)=@_;
-    my $part=$Apache::inputtags::part;
-    my $respid=$Apache::inputtags::response['-1'];
+
+    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"}=&Apache::lonnet::escape($image);
-    my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
+    $x{"cgi.$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) && $y =~/\S/) {
+
+    if (defined($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;
@@ -146,11 +282,10 @@ sub prep_image {
 	$x{"cgi.$id.OBJ$i"}=join(':',(($xmin),($ymax),($xmax),($ymin),
 				      "FF0000",($width)));
     }
-    if ($mode eq 'answer') {
+    if ($mode eq 'answer' || $mode eq 'answeronly') {
 	my $width = 1;
 	my $extrawidth = 2;
-	my @areas = @{ $Apache::response::foilgroup{"$name.area"} };
-	foreach my $area (@areas) {
+	foreach my $area (@{ $areas }) {
 	    if ($area=~/^rectangle:/) {
 		$x{"cgi.$id.OBJTYPE"}.='RECTANGLE:';
 		$i=$x{"cgi.$id.OBJCOUNT"}++;
@@ -173,24 +308,26 @@ sub prep_image {
 	    }
 	}
     }
-    &Apache::lonnet::appenv(%x);
+    &Apache::lonnet::appenv(\%x);
     return $id;
 }
 
 sub displayfoils {
     my ($target,@whichopt) = @_;
     my $result ='';
-    my $name;
     my $temp=1;
-    foreach $name (@whichopt) {
+    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' && $image !~ /^http:/ ) {
+	if ( ($target eq 'web' || $target eq 'answer') 
+	     && $image !~ /^https?\:/ ) {
 	    $image=&clean_up_image($image);
-	} 
+	}
+	push(@images,$image);
 	&Apache::lonxml::debug("image is $image");
 	if ( &Apache::response::show_answer() ) {
 	    if ($target eq 'tex') {
@@ -203,15 +340,111 @@ sub displayfoils {
 	    if ($target eq 'tex') {
 		$result.=$Apache::response::foilgroup{"$name.image"}."\\vskip 0 mm \n";
 	    } else {
-		my $id=$Apache::inputtags::response['-1'];
-		my $token=&prep_image($image);
-		my $temp=1;
-		$result.="<input type=\"image\" name=\"HWVAL_$id:$temp\" ".
-		    "src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
+		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') {
+        &get_prior_options(\@images,\@whichopt);
+    }
+    return $result;
+}
+
+sub get_prior_options {
+    my ($currimages,$curropt) = @_;
+    return unless((ref($curropt) eq 'ARRAY') && 
+                  (ref($currimages) eq 'ARRAY'));
+    my $part = $Apache::inputtags::part;
+    my $respid   = $Apache::inputtags::response[-1];
+    foreach my $i (1..$Apache::lonhomework::history{'version'}) {
+        my $partprefix = "$i:resource.$part";
+        my $sub_key = "$partprefix.$respid.submission";
+        next if (!exists($Apache::lonhomework::history{$sub_key}));
+        my $type_key = "$partprefix.type";
+        my @whichopt = ();
+        my @images = ();
+        if ($Apache::lonhomework::history{$type_key} eq 'randomizetry') {
+            my $order_key = "$partprefix.$respid.foilorder";
+            @whichopt = &Apache::lonnet::str2array($Apache::lonhomework::history{$order_key});
+            if (@whichopt > 0) {
+                foreach my $name (@whichopt) {
+                    my $image=$Apache::response::foilgroup{"$name.image"};
+                    if ($image !~ /^https?\:/ ) {
+                        $image=&clean_up_image($image);
+                    }
+                    push(@images,$image);
+                }
+            }
+        } else {
+            @whichopt = @{$curropt};
+            @images = @{$currimages};
+        }
+        my $submission;
+        if ((($env{'form.grade_username'} eq '') && ($env{'form.grade_domain'} eq '')) ||
+            (($env{'form.grade_username'} eq $env{'user.name'}) &&
+             ($env{'form.grade_domain'} eq $env{'user.domain'}))) {
+            $submission = $Apache::lonhomework::history{$sub_key};
+        } else {
+            unless (($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') ||
+                    ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) {
+                $submission = $Apache::lonhomework::history{$sub_key};
+            }
+        }
+        my $output =  &format_prior_response('grade',$submission,
+                                             [\@images,\@whichopt]);
+        if (defined($output)) {
+            $Apache::inputtags::submission_display{$sub_key} = $output;
+        }
+    }
+}
+
+sub format_prior_response {
+    my ($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 !~ /^https?\:/ ) {
+	    $image = &clean_up_image($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;
 }
 
@@ -219,7 +452,7 @@ sub clean_up_image {
     my ($image)=@_;
     if ($image =~ /\s*<img\s*/) {
 	($image) = ($image =~ /src\s*=\s*[\"\']([^\"\']+)[\"\']/i);
-	if ($image !~ /^http:/) {
+	if ($image !~ /^https?\:/) {
 	    $image=&Apache::lonnet::hreflocation('',$image);
 	}
 	if (!$image) {
@@ -227,7 +460,8 @@ sub clean_up_image {
 	}
     } else {
 	$image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
-	if (&Apache::lonnet::repcopy($image) ne OK) {
+	&Apache::lonxml::debug("repcopying: $image");
+	if (&Apache::lonnet::repcopy($image) ne 'ok') {
 	    $image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
 	}
     }
@@ -236,18 +470,27 @@ sub clean_up_image {
 
 sub gradefoils {
     my (@whichopt) = @_;
-    my $x;
-    my $y;
-    my $result;
-    my $id=$Apache::inputtags::response['-1'];
+
+    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) {
-	$x=$ENV{"form.HWVAL_$id:$temp.x"};
-	$y=$ENV{"form.HWVAL_$id:$temp.y"};
+	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 @areas; 
+        if (ref($Apache::response::foilgroup{"$name.area"}) eq 'ARRAY') {
+            @areas = @{ $Apache::response::foilgroup{"$name.area"} };
+        }
+	if (defined($x) && defined($y) && @areas) {
 	    my $grade="INCORRECT";
 	    foreach my $area (@areas) {
 		&Apache::lonxml::debug("Area is $area for $name");
@@ -258,44 +501,127 @@ sub gradefoils {
 		} elsif ($1 eq 'polygon') {
 		    $grade=&grade_polygon($area,$x,$y);
 		} else {
-		    &Apache::lonxml::error("Unknown area style $area");
+		    &Apache::lonxml::error(&mt('Unknown area style [_1]',$area));
 		}
 		&Apache::lonxml::debug("Area said $grade");
 		if ($grade eq 'APPROX_ANS') { last; }
 	    }
 	    &Apache::lonxml::debug("Foil was $grade");
-	    if ($grade eq 'INCORRECT') { $result= 'INCORRECT'; }
-	    if (($grade eq 'APPROX_ANS') && ($result ne 'APPROX_ANS')) { $result=$grade; }
-	    &Apache::lonxml::debug("Question is $result");
-	    $temp++;
+	    push(@results, $grade)
+	} else {
+	    push(@results, 'MISSING_ANSWER')
 	}
+	$temp++;
+    }
+    if ($Apache::lonhomework::type eq 'randomizetry') {
+        $Apache::lonhomework::results{"resource.$partid.$id.foilorder"} = &Apache::lonnet::array2str(@whichopt);
+    }
+    my ($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 ($result) { 
+	if ($Apache::lonhomework::type eq 'survey') { 
+            $result='SUBMITTED';
+        } elsif ($Apache::lonhomework::type eq 'surveycred') { 
+            $result='SUBMITTED_CREDIT'; 
+        } elsif ($Apache::lonhomework::type eq 'anonsurvey') { 
+            $result='ANONYMOUS'; 
+        } elsif ($Apache::lonhomework::type eq 'anonsurveycred') { 
+            $result='ANONYMOUS_CREDIT'; 
+        }
+    }
+
+    &Apache::response::handle_previous(\%previous,$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'];
+        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) {
+            if ((($env{'form.grade_username'} eq '') && ($env{'form.grade_domain'} eq '')) ||
+                (($env{'form.grade_username'} eq $env{'user.name'}) &&
+                 ($env{'form.grade_domain'} eq $env{'user.domain'}))) {
+                $string =
+                    $Apache::lonhomework::history{"resource.$part.$respid.submission"};
+            } else {
+                unless (($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurvey') ||
+                        ($Apache::lonhomework::history{"resource.$part.type"} eq 'anonsurveycred')) {
+                    $string =
+                        $Apache::lonhomework::history{"resource.$part.$respid.submission"};
+                }
+            }
+        }
+    }
+
+    if ($string !~ /=/) {
+	return split(':',$string);
+    } else {
+	my %response = &Apache::lonnet::str2hash($string);
+	return split(':',$response{$name});
     }
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
-    return '';
 }
 
 sub end_foilgroup {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
-    my @whichopt;
+    my (@images,@whichopt);
+
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
-	$target eq 'analyze') {
+	$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);
+            if ($Apache::lonhomework::type eq 'randomizetry') {
+                if ($target eq 'web') {
+                    &get_prior_options(\@images,\@whichopt);
+                }
+            }
+	    $Apache::lonxml::post_evaluate=0;
 	} elsif ($target eq 'grade') {
-	    if ( defined $ENV{'form.submitted'}) { &gradefoils(@whichopt); }
+	    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();
     }
+    &Apache::response::poprandomnumber();
     return $result;
 }
 
@@ -334,23 +660,38 @@ sub insert_foil {
 $Apache::imageresponse::curname='';
 sub start_foil {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $result;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
-	$target eq 'analyze') {
+	$target eq 'analyze' || $target eq 'answer') {
 	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
-	if ($name eq '') { $name=$Apache::lonxml::curdepth; }
+	if ($name eq "") {
+	    &Apache::lonxml::warning(&mt('Foils without names exist. This can cause problems to malfunction.'));
+	    $name=$Apache::lonxml::curdepth;
+	}
 	if (defined($Apache::response::foilnames{$name})) {
-	    &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
+	    &Apache::lonxml::error(&mt("Foil name [_1] appears more than once. Foil names need to be unique."
+                                      ,'<b><tt>'.$name.'</tt></b>'));
 	}
 	$Apache::response::foilnames{$name}++;
 	if ( $Apache::imageresponse::conceptgroup
-	     && !&Apache::response::showallfoils()) {
+	     && !&Apache::response::showallfoils()
+	     ) {
 	    push(@{ $Apache::response::conceptgroup{'names'} }, $name);
 	} else {
 	    push(@{ $Apache::response::foilgroup{'names'} }, $name);
 	}
 	$Apache::imageresponse::curname=$name;
-    }
-    return '';
+    } 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 {
@@ -365,10 +706,11 @@ sub end_foil {
 sub start_text {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
-    if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
+    if ($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);
+	my $descr=&Apache::lonxml::get_all_text('/text',$parser,$style);
 	$result=&Apache::edit::tag_start($target,$token,'Task Description').
 	    &Apache::edit::editfield($token->[1],$descr,'Text',60,2).
 	    &Apache::edit::end_row();
@@ -381,10 +723,12 @@ sub start_text {
 sub end_text {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
-    if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') {
+    if ($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::showallfoils()
+	     ) {
 	    $Apache::response::conceptgroup{"$name.text"} = &Apache::lonxml::endredirection;
 	} else {
 	    $Apache::response::foilgroup{"$name.text"} = &Apache::lonxml::endredirection;
@@ -398,17 +742,18 @@ sub end_text {
 sub start_image {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
-    if ($target eq 'web' || $target eq 'tex' || $target eq 'analyze') { 
+    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);
+	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').' ';
-	$result.=&Apache::edit::search(undef,'textnode').
+	    &Apache::edit::editline($token->[1],$bgimg,'Image Source File',40).
+	    &Apache::edit::browse_or_search(undef,'textnode',undef,$only,undef,1).
 	    &Apache::edit::end_row();
     } elsif ($target eq "modified") {
 	$result=$token->[4].&Apache::edit::modifiedfield('/image',$parser);
@@ -420,19 +765,21 @@ sub end_image {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     my $name = $Apache::imageresponse::curname;
-    if ($target eq 'web') {
-	my $image = &Apache::lonxml::endredirection;
+    if ($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::showallfoils()
+	     ) {
 	    $Apache::response::conceptgroup{"$name.image"} = $image;
 	} else {
 	    $Apache::response::foilgroup{"$name.image"} = $image;
 	}
     } elsif ($target eq 'analyze') {
-	my $image = &Apache::lonxml::endredirection;
+	my $image = &Apache::lonxml::endredirection();
 	if ( $Apache::imageresponse::conceptgroup
-	     && !&Apache::response::showallfoils()) {
+	     && !&Apache::response::showallfoils()
+	     ) {
 	    $Apache::response::conceptgroup{"$name.image"} = $image;
 	} else {
 	    $Apache::response::foilgroup{"$name.image"} = $image;
@@ -440,74 +787,33 @@ sub end_image {
     } elsif ($target eq 'edit') {
 	$result=&Apache::edit::end_table();
     } elsif ($target eq 'tex') {
-	my $src = &Apache::lonxml::endredirection;
-	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
-	my $width_param = '';
-	my $height_param = '';
-	my $scaling = .3;
-	my $image = Image::Magick->new;
-	my $current_figure = $image->Read($src);
-	$width_param = $image->Get('width') * $scaling;;
-	$height_param = $image->Get('height') * $scaling;;
-	undef $image;
-	my $epssrc = $src;
-	$epssrc =~ s/(\.gif|\.jpg)$/\.eps/i;
-	if (not -e $epssrc) {
-	    my $localfile = $epssrc;
-	    $localfile =~ s/.*(\/res)/$1/;	
-	    my $file;
-	    my $path;	
-	    if ($localfile =~ m!(.*)/([^/]*)$!) {
-		$file = $2;
-		$path = $1.'/'; 
-	    }	
-	    my $signal_eps = 0;
-	    my @content_directory = &Apache::lonnet::dirlist($path);
-	    for (my $iy=0;$iy<=$#content_directory;$iy++) {
-		my @tempo_array = split(/&/,$content_directory[$iy]);
-		$content_directory[$iy] = $tempo_array[0];
-		if ($file eq $tempo_array[0]) {
-		    $signal_eps = 1;
-		    last;
-		}
-	    }
-	    if ($signal_eps) {
-		my $eps_file = &Apache::lonnet::getfile($localfile);
-	    } else {
-		$localfile = $src;
-		$localfile =~ s/.*(\/res)/$1/;	
-		my $as = &Apache::lonnet::getfile($src);		      
-	    }
-	}
-	my $file;
-	my $path;	
-	if ($src =~ m!(.*)/([^/]*)$!) {
-	    $file = $2;
-	    $path = $1.'/'; 
-	}
-	my $newsrc = $src;
-	$newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
-	$file=~s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
-	#do we have any specified size of the picture?
-	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval); 
-	my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval); 
-	my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
-	if ($TeXwidth ne '') { 
-	    $width_param = $TeXwidth; 
-	} elsif ($TeXheight ne '') { 
-	    $width_param = $TeXheight/$height_param*$width_param;
-	} elsif ($width ne '') {
-	    $width_param = $width*$scaling;      
-	}
-	#where can we find the picture?
-	if (-e $newsrc) {
-	    if ($path) {
-		$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
-	    }
+	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//;
+	} elsif (!($src =~ /\\/)) {
+	    my ($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.'}';
 	} else {
-	    #care about eps dynamical generation
-	    $Apache::response::foilgroup{"$name.image"}='\vskip 0 mm '.&Apache::londefdef::eps_generation($src,$file,$width_param);
+	    $graphinclude = $src;   # Already fully formed.
 	}
+	$Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \noindent '.$graphinclude;
     } 
     return $result;
 }
@@ -516,10 +822,10 @@ sub start_rectangle {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
-	$target eq 'analyze') { 
+	$target eq 'analyze' || $target eq 'answer') { 
 	&Apache::lonxml::startredirection; 
     } elsif ($target eq 'edit') {
-	my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser);
+	my $coords=&Apache::lonxml::get_all_text('/rectangle',$parser,$style);
 	$result=&Apache::edit::tag_start($target,$token,'Rectangle').
 	    &Apache::edit::editline($token->[1],$coords,'Coordinate Pairs',40).
 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
@@ -548,12 +854,14 @@ sub end_rectangle {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
-	$target eq 'analyze') {
+	$target eq '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()) {
+	     && !&Apache::response::showallfoils()
+	     ) {
 	    push @{ $Apache::response::conceptgroup{"$name.area"} },"rectangle:$area";
 	} else {
 	    push @{ $Apache::response::foilgroup{"$name.area"} },"rectangle:$area";
@@ -568,10 +876,10 @@ sub start_polygon {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
-	$target eq 'analyze') { 
+	$target eq 'analyze' || $target eq 'answer') { 
 	&Apache::lonxml::startredirection; 
     } elsif ($target eq 'edit') {
-	my $coords=&Apache::lonxml::get_all_text('/polygon',$parser);
+	my $coords=&Apache::lonxml::get_all_text('/polygon',$parser,$style);
 	$result=&Apache::edit::tag_start($target,$token,'Polygon').
 	    &Apache::edit::editline($token->[1],$coords,'Coordinate list',40).
 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
@@ -627,13 +935,14 @@ sub end_polygon {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
-	$target eq 'analyze') {
+	$target eq '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()) {
+	     && !&Apache::response::showallfoils()
+	     ) {
 	    push @{ $Apache::response::conceptgroup{"$name.area"} },"polygon:$area";
 	} else {
 	    push @{ $Apache::response::foilgroup{"$name.area"} },"polygon:$area";