--- loncom/homework/response.pm	2006/06/19 16:15:53	1.139
+++ loncom/homework/response.pm	2006/07/18 17:24:33	1.144
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.139 2006/06/19 16:15:53 www Exp $
+# $Id: response.pm,v 1.144 2006/07/18 17:24:33 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -128,11 +128,13 @@ sub setrandomnumber {
 	}
 	$shift_amt=scalar(@Apache::inputtags::responselist);
     } elsif ($Apache::lonhomework::parsing_a_task) {
-	$id1=$Apache::bridgetask::dimension;
-	if (!$ignore_id2 && defined($Apache::bridgetask::instance[-1])) {
-	    $id2=$Apache::bridgetask::instance[-1];
+	$id1=&Apache::bridgetask::get_dim_id();
+	if (!$ignore_id2 && ref($Apache::bridgetask::instance{$id1})) {
+	    $id2=$Apache::bridgetask::instance{$id1}[-1];
+	    $shift_amt=scalar(@{$Apache::bridgetask::instance{$id1}});
+	} else {
+	    $shift_amt=0;
 	}
-	$shift_amt=scalar(@Apache::bridgetask::instance);
     } 
     &Apache::lonxml::debug("id1: $id1, id2: $id2, shift_amt: $shift_amt");
     if (!$rand_alg || $rand_alg eq '32bit' || $rand_alg eq '64bit' ||
@@ -376,7 +378,8 @@ sub start_customresponse {
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::tag_start($target,$token);
 	$result.=&Apache::edit::text_arg('String to display for answer:',
-					 'answerdisplay',$token);
+					 'answerdisplay',$token).
+                 &Apache::loncommon::help_open_topic('Custom_Response_Problems','How to write custom responses');
 	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
 	my $constructtag;
@@ -434,23 +437,82 @@ sub end_customresponse {
     return $result;
 }
 
+
 sub start_mathresponse {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $id = &Apache::response::start_response($parstack,$safeeval);
+    push(@Apache::lonxml::namespace,'mathresponse');
     my $result;
-    if ($target eq 'meta') {
-        &Apache::response::start_response($parstack,$safeeval);
-        $result=&Apache::response::meta_package_write('mathresponse');
-        &Apache::response::end_response();
-    } else {
-#       $result.=&start_numericalresponse(@_);
+    undef($Apache::response::custom_answer);
+    &Apache::lonxml::register('Apache::response',('answer'));
+    if ($target eq 'web') {
+  	if (  &Apache::response::show_answer() ) {
+	    my $answer = &Apache::lonxml::get_param('answerdisplay',$parstack,
+						   $safeeval);
+	    $Apache::inputtags::answertxt{$id}=$answer;
+	}
+    } elsif ($target eq 'edit') {
+	$result.=&Apache::edit::tag_start($target,$token);
+	$result.=&Apache::edit::text_arg('String to display for answer:',
+					 'answerdisplay',$token);
+	$result.=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag;
+	$constructtag=&Apache::edit::get_new_args($token,$parstack,
+						  $safeeval,'answerdisplay');
+	if ($constructtag) {
+	    $result = &Apache::edit::rebuild_tag($token);
+	    $result.=&Apache::edit::handle_insert();
+	}
+    } elsif ($target eq 'answer' || $target eq 'grade') {
+	&Apache::response::reset_params();
+    } elsif ($target eq 'meta') {
+	$result .= &Apache::response::meta_package_write('mathresponse');
     }
     return $result;
 }
 
 sub end_mathresponse {
-#    return end_numericalresponse(@_);
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    my $part=$Apache::inputtags::part;
+    my $id=$Apache::inputtags::response[-1];
+    if ( $target eq 'grade' && &Apache::response::submitted() ) {
+	my $response = &Apache::response::getresponse();
+	if ( $response =~ /[^\s]/ && 
+	     $Apache::response::custom_answer_type eq 'loncapa/perl') {
+	    if (!$Apache::lonxml::default_homework_loaded) {
+		&Apache::lonxml::default_homework_load($safeeval);
+	    }
+	    my %previous = &Apache::response::check_for_previous($response,
+								 $part,$id);
+	    $Apache::lonhomework::results{"resource.$part.$id.submission"}=
+		$response;
+	    my $error;
+	    ${$safeeval->varglob('LONCAPA::mathresponse_submission')}=
+		$response;
+	    
+	    my $award = &Apache::run::run('{ my $submission=$LONCAPA::mathresponse_submission;'.$Apache::response::custom_answer.'}',$safeeval);
+	    if (!&Apache::inputtags::valid_award($award)) {
+		$error = $award;
+		$award = 'ERROR';
+	    }
+	    &Apache::response::handle_previous(\%previous,$award);
+	    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=
+		$award;
+	    if ($error) {
+		$Apache::lonhomework::results{"resource.$part.$id.awardmsg"}=
+		    $error;
+	    }
+	}
+    }
+    pop(@Apache::lonxml::namespace);
+    &Apache::lonxml::deregister('Apache::response',('answer'));
+    &Apache::response::end_response();
+    return $result;
 }
 
+
 sub start_answer {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;
@@ -928,7 +990,7 @@ sub add_to_gradingqueue {
 # a return of 3 means it after the answer date
 sub check_status {
     my ($id)=@_;
-    if (!$id) {	$id=$Apache::linputtags::part; }
+    if (!defined($id)) { $id=$Apache::inputtags::part; }
     my $curtime=&Apache::lonnet::EXT('system.time');
     my $opendate=&Apache::lonnet::EXT("resource.$id.opendate");
     my $duedate=&Apache::lonnet::EXT("resource.$id.duedate");