--- loncom/homework/imageresponse.pm	2003/11/10 23:29:27	1.40
+++ loncom/homework/imageresponse.pm	2007/06/19 20:23:56	1.83
@@ -1,7 +1,8 @@
+
 # The LearningOnline Network with CAPA
 # image click response style
 #
-# $Id: imageresponse.pm,v 1.40 2003/11/10 23:29:27 albertel Exp $
+# $Id: imageresponse.pm,v 1.83 2007/06/19 20:23:56 banghart Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -30,9 +31,15 @@
 
 package Apache::imageresponse;
 use strict;
-use Image::Magick;
-use Apache::randomlylabel;
+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;
+ 
 
 BEGIN {
     &Apache::lonxml::register('Apache::imageresponse',('imageresponse'));
@@ -42,9 +49,12 @@ 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'));
+    &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') {
@@ -56,11 +66,26 @@ sub start_imageresponse {
 
 sub end_imageresponse {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
-    &Apache::response::end_response;
-    pop @Apache::lonxml::namespace;
+
+    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') {
+	&Apache::lonxml::increment_counter(&Apache::response::repetition());
+    }
+    &Apache::response::end_response();
+
     return $result;
 }
 
@@ -68,7 +93,7 @@ sub end_imageresponse {
 sub start_foilgroup {
     %Apache::response::foilgroup=();
     $Apache::imageresponse::conceptgroup=0;
-    &Apache::response::setrandomnumber();
+    &Apache::response::pushrandomnumber();
     return '';
 }
 
@@ -78,7 +103,7 @@ sub getfoilcounts {
     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; }
+    #if (&Apache::response::showallfoils()) { $max=$count; }
     return ($count,$max);
 }
 
@@ -90,11 +115,11 @@ sub whichfoils {
     while ((($#whichopt+1) < $max) && ($#names > -1)) {
 	&Apache::lonxml::debug("Have $#whichopt max is $max");
 	my $aopt;
-	if (&Apache::response::showallfoils()) {
-	    $aopt=0;
-	} else {
+#	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");
@@ -104,41 +129,81 @@ sub whichfoils {
 }
 
 sub prep_image {
-    my ($image)=@_;
+    my ($image,$mode,$name)=@_;
     my $part=$Apache::inputtags::part;
-    my $id=$Apache::inputtags::response['-1'];
-    my $token=$Apache::lonxml::curdepth.'_'.$$;
-    my $args="BGIMG=".$image;
-    &Apache::lonxml::debug("args is $args image is $image");
-    my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$id.submission"});
+    my $respid=$Apache::inputtags::response['-1'];
+    my ($x,$y)=split(/:/,$Apache::lonhomework::history{"resource.$part.$respid.submission"});
+    &draw_image($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) && defined($y)) {
-	$args.="&LINECOUNT=4";
+
+    if (defined($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;
-	$args.="&LINEW0=".($width+$extrawidth);
-	$args.="&LINEC0=FFFFFF";
-	$args.="&LINEX10=".($x-$length)."&LINEY10=".($y-$length);
-	$args.="&LINEX20=".($x+$length)."&LINEY20=".($y+$length);
-	$args.="&LINEW1=".($width+$extrawidth);
-	$args.="&LINEC1=FFFFFF";
-	$args.="&LINEX11=".($x-$length)."&LINEY11=".($y+$length);
-	$args.="&LINEX21=".($x+$length)."&LINEY21=".($y-$length);
-	$args.="&LINEW2=$width";
-	$args.="&LINEC2=FF0000";
-	$args.="&LINEX12=".($x-$length)."&LINEY12=".($y-$length);
-	$args.="&LINEX22=".($x+$length)."&LINEY22=".($y+$length);
-	$args.="&LINEW3=$width";
-	$args.="&LINEC3=FF0000";
-	$args.="&LINEX13=".($x-$length)."&LINEY13=".($y+$length);
-	$args.="&LINEX23=".($x+$length)."&LINEY23=".($y-$length);
-    }
-    &Apache::lonxml::debug("args is $args image is $image");
-    &Apache::lonnet::appenv(("imagerequest.$token"=>
-			     &Apache::lonnet::escape($args)));
-    return $token;
+	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 {
@@ -146,6 +211,7 @@ sub displayfoils {
     my $result ='';
     my $name;
     my $temp=1;
+    my @images;
     foreach $name (@whichopt) {
 	$result.=$Apache::response::foilgroup{"$name.text"};
 	&Apache::lonxml::debug("Text is $result");
@@ -153,17 +219,15 @@ sub displayfoils {
 	my $image=$Apache::response::foilgroup{"$name.image"};
 	&Apache::lonxml::debug("image is $image");
 	if ( $target eq 'web' && $image !~ /^http:/ ) {
-	    $image=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$image);
-	    if (&Apache::lonnet::repcopy($image) ne OK) {
-		$image='/home/httpd/html/adm/lonKaputt/lonlogo_broken.gif';
-	    }
+	    $image=&clean_up_image($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);
+		my $token=&prep_image($image,'answer',$name);
 		$result.="<img src=\"/adm/randomlabel.png?token=$token\" /><br />\n";
 	    }
 	} else {
@@ -179,19 +243,81 @@ sub displayfoils {
 	}
 	$temp++;
     }
+    if ($target eq 'web') {
+	&Apache::response::setup_prior_tries_hash(\&format_prior_response,
+						  [\@images]);
+    }
     return $result;
 }
 
+sub format_prior_response {
+    my ($mode,$answer,$other_data) = @_;
+    my ($x,$y)=split(/:/,$answer);
+    my $images = $other_data->[0];
+
+    my $token = &draw_image('submission',$images->[0],$x,$y);
+
+    return "<img class=\"LC_prior_image\" src=\"/adm/randomlabel.png?token=$token\" />";
+    
+}
+
+sub display_answers {
+    my ($target,$whichopt)=@_;
+
+    my $result;
+    foreach my $name (@$whichopt) {
+	my $image=$Apache::response::foilgroup{"$name.image"};
+	&Apache::lonxml::debug("image is $image");
+	if ( $target eq 'web' && $image !~ /^http:/ ) {
+	    $image = &clean_up_image($image);
+	} 
+	my $token=&prep_image($image,'answeronly',$name);
+
+	$result.=&Apache::response::answer_header('imageresponse');
+	$result.=&Apache::response::answer_part('imageresponse',"<img src=\"/adm/randomlabel.png?token=$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 {
+	$image=&Apache::lonnet::filelocation($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';
+	}
+    }
+    return $image;
+}
+
 sub gradefoils {
     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 $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"};
+	$x=$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 $name");
 	if (defined($x) && defined($y) &&
 	    defined(@{ $Apache::response::foilgroup{"$name.area"} })) {
@@ -203,6 +329,8 @@ sub gradefoils {
 		&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("Unknown area style $area");
 		}
@@ -216,32 +344,48 @@ sub gradefoils {
 	    $temp++;
 	}
     }
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
-    return '';
+    my $responsestr="$x:$y";
+    my $part=$Apache::inputtags::part;
+    my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
+    if ($result 
+	&& $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
+    &Apache::response::handle_previous(\%previous,$result);
+    $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
+    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
+    return;
 }
 
 sub end_foilgroup {
     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 '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); }
+	    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;
 }
 
@@ -280,19 +424,37 @@ 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("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));
+	}
+	$Apache::response::foilnames{$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 {
@@ -307,10 +469,11 @@ 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],$descr,'Text',60,2).
 	    &Apache::edit::end_row();
@@ -323,10 +486,12 @@ sub start_text {
 sub end_text {
     my ($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;
@@ -340,16 +505,18 @@ 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').' ';
+	$result.=&Apache::edit::browse(undef,'textnode',undef,$only).' ';
 	$result.=&Apache::edit::search(undef,'textnode').
 	    &Apache::edit::end_row();
     } elsif ($target eq "modified") {
@@ -362,19 +529,21 @@ 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"} = $image;
@@ -382,77 +551,31 @@ sub end_image {
     } elsif ($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//;
 	} else {
-	    my $temp_file;
-	    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
-	    $temp_file = Apache::File->new('>>'.$filename); 
-	    print $temp_file "$src\n";
-	    $Apache::response::foilgroup{"$name.image"} ='\vskip 0 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
+	    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 $result;
 }
@@ -461,15 +584,16 @@ sub start_rectangle {
     my ($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],$coords,'Coordinate Pairs',40).
-	    &Apache::edit::entercoordpair(undef,'textnode').
+	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
 	    &Apache::edit::end_row();
     } elsif ($target eq "modified") {
+	&Apache::edit::deletecoorddata();
 	$result=$token->[4].&Apache::edit::modifiedfield('/rectangle',$parser);
     }
     return $result;
@@ -478,11 +602,7 @@ sub start_rectangle {
 sub grade_rectangle {
     my ($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=$4;
+    my ($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; }
@@ -496,18 +616,101 @@ 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:$area";
 	}
     } elsif ($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 {
+	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 $result;
 }