--- loncom/homework/imageresponse.pm	2005/05/23 11:02:59	1.69
+++ loncom/homework/imageresponse.pm	2008/03/12 02:46:53	1.93
@@ -1,8 +1,8 @@
-
+#
 # The LearningOnline Network with CAPA
 # image click response style
 #
-# $Id: imageresponse.pm,v 1.69 2005/05/23 11:02:59 foxr Exp $
+# $Id: imageresponse.pm,v 1.93 2008/03/12 02:46:53 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -37,6 +37,9 @@ 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'));
@@ -56,19 +59,54 @@ 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' || $target eq 'analyze') {
+	&Apache::lonxml::increment_counter(&Apache::response::repetition(), 
+					   "$part_id.$response_id");
+	if ($target eq 'analyze') {
+	    &Apache::lonhomework::set_bubble_lines();
+	}
+	
+    }
+    &Apache::response::end_response();
+
     return $result;
 }
 
@@ -86,42 +124,54 @@ 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);
 }
 
 sub whichfoils {
     my ($max)=@_;
-    if (!defined(@{ $Apache::response::foilgroup{'names'} })) { return; }
+    return if (!defined(@{ $Apache::response::foilgroup{'names'} }));
     my @names = @{ $Apache::response::foilgroup{'names'} };
-    my @whichopt =();
+    my @whichopt;
     while ((($#whichopt+1) < $max) && ($#names > -1)) {
 	&Apache::lonxml::debug("Have $#whichopt max is $max");
 	my $aopt;
-#	if (&Apache::response::showallfoils()) {
-#	    $aopt=0;
-#	} else {
+	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);
+	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) && $y =~/\S/ && !&Apache::response::show_answer()) {
+
+    if (defined($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;
@@ -147,11 +197,10 @@ 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"}++;
@@ -174,24 +223,26 @@ 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 !~ /^http:/ ) {
 	    $image=&clean_up_image($image);
-	} 
+	}
+	push(@images,$image);
 	&Apache::lonxml::debug("image is $image");
 	if ( &Apache::response::show_answer() ) {
 	    if ($target eq 'tex') {
@@ -204,15 +255,64 @@ 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') {
+	&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;
 }
 
@@ -238,14 +338,21 @@ 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"} })) {
@@ -266,41 +373,80 @@ sub gradefoils {
 		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++;
     }
-    my $responsestr="$x:$y";
+    my ($result) = &Apache::inputtags::finalizeawards(\@results,[]);
+    &Apache::lonxml::debug("Question is $result");
+
     my $part=$Apache::inputtags::part;
-    my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
+    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.$id.submission"}=$responsestr;
+    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
+	&stringify_submission(\%response);
     $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
-    return '';
+    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' || $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); }
 	} 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') {
 	$result=&Apache::edit::end_table();
     }
@@ -345,10 +491,10 @@ sub start_foil {
     my ($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) {
-	    &Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction.");
+	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})) {
@@ -356,7 +502,7 @@ sub start_foil {
 	}
 	$Apache::response::foilnames{$name}++;
 	if ( $Apache::imageresponse::conceptgroup
-	     #&& !&Apache::response::showallfoils()
+	     && !&Apache::response::showallfoils()
 	     ) {
 	    push(@{ $Apache::response::conceptgroup{'names'} }, $name);
 	} else {
@@ -388,10 +534,11 @@ sub end_foil {
 sub start_text {
     my ($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],$descr,'Text',60,2).
 	    &Apache::edit::end_row();
@@ -404,10 +551,11 @@ sub start_text {
 sub end_text {
     my ($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 {
@@ -422,16 +570,18 @@ 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") {
@@ -444,11 +594,11 @@ sub end_image {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
     my $name = $Apache::imageresponse::curname;
-    if ($target eq 'web') {
+    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"} = $image;
 	} else {
@@ -457,7 +607,7 @@ sub end_image {
     } elsif ($target eq 'analyze') {
 	my $image = &Apache::lonxml::endredirection();
 	if ( $Apache::imageresponse::conceptgroup
-	     #&& !&Apache::response::showallfoils()
+	     && !&Apache::response::showallfoils()
 	     ) {
 	    $Apache::response::conceptgroup{"$name.image"} = $image;
 	} else {
@@ -477,8 +627,13 @@ sub end_image {
 	#  Gnuplot e.g. just generates the latex to put inplace.
 	#
 	my $graphinclude;
-	if ($src =~ /^\\graphicspath/) {
+	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,$width_param)=
@@ -494,10 +649,10 @@ sub start_rectangle {
     my ($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],$coords,'Coordinate Pairs',40).
 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'box').
@@ -526,13 +681,13 @@ sub end_rectangle {
     my ($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:$area";
 	} else {
@@ -548,10 +703,10 @@ sub start_polygon {
     my ($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],$coords,'Coordinate list',40).
 	    &Apache::edit::entercoord(undef,'textnode',undef,undef,'polygon').
@@ -607,13 +762,13 @@ sub end_polygon {
     my ($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 {