--- loncom/interface/spreadsheet/Spreadsheet.pm	2006/09/03 00:39:57	1.70
+++ loncom/interface/spreadsheet/Spreadsheet.pm	2007/01/25 22:00:07	1.73.2.1
@@ -1,5 +1,5 @@
 #
-# $Id: Spreadsheet.pm,v 1.70 2006/09/03 00:39:57 albertel Exp $
+# $Id: Spreadsheet.pm,v 1.73.2.1 2007/01/25 22:00:07 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -172,16 +172,20 @@ sub filename {
                 $newfilename = 'default_'.$self->{'type'};
             }
         }
-        if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
-            $newfilename = 'default_'.$self->{'type'};
-        }
-        if ($newfilename !~ /^default\.$self->{'type'}$/ &&
-            $newfilename !~ /^\/res\/(.*)spreadsheet$/) {
-            if ($newfilename !~ /_$self->{'type'}$/) {
-                $newfilename =~ s/[\s_]*$//;
-                $newfilename .= '_'.$self->{'type'};
-            }
-        }
+	if ($newfilename eq &mt('LON-CAPA Standard')) {
+	    undef($newfilename);
+	} else {
+	    if ($newfilename !~ /\w/ || $newfilename =~ /^\W*$/) {
+		$newfilename = 'default_'.$self->{'type'};
+	    }
+	    if ($newfilename !~ /^default\.$self->{'type'}$/ &&
+		$newfilename !~ /^\/res\/(.*)spreadsheet$/) {
+		if ($newfilename !~ /_$self->{'type'}$/) {
+		    $newfilename =~ s/[\s_]*$//;
+		    $newfilename .= '_'.$self->{'type'};
+		}
+	    }
+	}
         $self->{'filename'} = $newfilename;
         return;
     }
@@ -803,6 +807,8 @@ sub expandnamed {
     if ($expression=~/^\&/) {
 	my ($func,$var,$formula)=($expression=~/^\&(\w+)\(([^\;]+)\;(.*)\)/);
 	my @vars=split(/\W+/,$formula);
+	# make the list uniq
+	@vars = keys(%{{ map { $_ => 1 } @vars }});
         my %values=();
 	foreach my $varname ( @vars ) {
             if ($varname=~/^(parameter|stores|timestamp)/) {
@@ -1684,7 +1690,8 @@ sub load {
             # Load the spreadsheet definition file from the save file
             my %tmphash = &Apache::lonnet::dump($filename,$cdom,$cnum);
             my ($tmp) = keys(%tmphash);
-            if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
+            if (%tmphash
+		&& $tmp !~ /^(con_lost|error|no_such_host)/i) {
                 while (my ($cell,$formula) = each(%tmphash)) {
                     $formulas->{$cell}=$formula;
                 }
@@ -1790,13 +1797,11 @@ sub save {
 	    &Apache::lonnet::appenv('course.'.$self->{'cid'}.'.spreadsheet_default_'.
 				    $self->{'type'} => $self->filename());
         } 
-        if ($self->is_default()) {
-            if ($self->{'type'} eq 'studentcalc') {
-                &Apache::lonnet::expirespread('','','studentcalc','');
-            } elsif ($self->{'type'} eq 'assesscalc') {
-                &Apache::lonnet::expirespread('','','assesscalc','');
-                &Apache::lonnet::expirespread('','','studentcalc','');
-            }
+	if ($self->{'type'} eq 'studentcalc') {
+	    &Apache::lonnet::expirespread('','','studentcalc','');
+	} elsif ($self->{'type'} eq 'assesscalc') {
+	    &Apache::lonnet::expirespread('','','assesscalc','');
+	    &Apache::lonnet::expirespread('','','studentcalc','');
         }
         return $reply;
     }
@@ -1881,14 +1886,13 @@ sub othersheets {
     my ($stype) = @_;
     $stype = $self->{'type'} if (! defined($stype) || $stype !~ /calc$/);
     #
-    my @alternatives=();
+    my @alternatives=(&mt('Default'), &mt('LON-CAPA Standard'));
     my %results=&Apache::lonnet::dump($stype.'_spreadsheets',
                                       $self->{'cdom'}, $self->{'cnum'});
     my ($tmp) = keys(%results);
-    if ($tmp =~ /^(con_lost|error|no_such_host)/i ) {
-        @alternatives = (&mt('Default'));
-    } else {
-        @alternatives = (&mt('Default'), sort (keys(%results)));
+    if (%results
+	&& $tmp !~ /^(con_lost|error|no_such_host)/i ) {
+        push(@alternatives, sort(keys(%results)));
     }
     return @alternatives; 
 }