--- loncom/interface/spreadsheet/Spreadsheet.pm	2005/09/01 21:52:56	1.56
+++ loncom/interface/spreadsheet/Spreadsheet.pm	2006/04/06 16:43:49	1.66
@@ -1,5 +1,5 @@
 #
-# $Id: Spreadsheet.pm,v 1.56 2005/09/01 21:52:56 albertel Exp $
+# $Id: Spreadsheet.pm,v 1.66 2006/04/06 16:43:49 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -85,7 +85,7 @@ sub new {
     my $class = ref($this) || $this;
     my ($stype) = ($class =~ /Apache::(.*)$/);
     #
-    my ($name,$domain,$filename,$usymb)=@_;
+    my ($name,$domain,$filename,$usymb,$section)=@_;
     if (defined($usymb) && ref($usymb)) {
         $usymb = $usymb->symb;
     }
@@ -95,10 +95,15 @@ sub new {
     if (! defined($domain) || $domain eq '') {
         $domain = $env{'user.domain'};
     }
+    if (! defined($section) || $section eq '') {
+        $section = &Apache::lonnet::getsection($domain,$name,
+					       $env{'request.course.id'});
+    }
     #
     my $self = {
         name     => $name,
         domain   => $domain,
+        section  => $section,
         type     => $stype,
         symb     => $usymb,
         errorlog => '',
@@ -378,10 +383,12 @@ Calls the system EXT function to determi
 
 #-------------------------------------------------------
 sub EXT {
-    my ($parameter) = @_;
+    my ($parameter,$specific_symb) = @_;
     return '' if (! defined($parameter) || $parameter eq '');
     $parameter =~ s/^parameter\./resource\./;
-    my $value = &Apache::lonnet::EXT($parameter,$symb,$domain,$name,$usection);
+    if ($specific_symb eq '') { $specific_symb = $symb; }
+    my $value = &Apache::lonnet::EXT($parameter,$specific_symb,$domain,$name,
+				     $usection);
     return $value;
 }
 
@@ -697,7 +704,7 @@ sub get_values {
 	}
 	return \@values;
     } else {
-	$num = '(\d+)';
+	$num = '([1-9]\d*)';
     }
     if (($la eq '*') || ($ua eq '*')) {
         $alpha='[A-z]';
@@ -806,7 +813,7 @@ sub expandnamed {
                 $result.=$thissum.'+';
             } 
             $result=~s/\+$//;
-            return $result;
+            return '('.$result.')';
         } else {
 	    return 0;
         }
@@ -1193,12 +1200,19 @@ sub display {
             last;
         }
     }
+    $self->{outputmode} = $outputmode;
     if ($outputmode eq 'html') {
         $self->compute($r);
         $self->outsheet_html($r);
     } elsif ($outputmode eq 'htmlclasslist') {
         # No computation neccessary...  This is kludgy
         $self->outsheet_htmlclasslist($r);
+    } elsif ($outputmode eq 'source') {
+        # No computation necessary. Rumor has it that this is some
+        # sort of kludge w.r.t. not "computing". It's also
+        # a bit of of a kludge that we call "outsheet_html" and 
+        # let the 'outputmode' cause the outputting of source.
+        $self->outsheet_html($r);
     } elsif ($outputmode eq 'excel') {
         $self->compute($r);
         $self->outsheet_excel($r);
@@ -1238,10 +1252,12 @@ sub html_export_row {
     foreach my $cell (@rowdata) {
         if ($cell->{'name'} =~ /^[A-Z]/) {
 	    $row_html .= '<td bgcolor="'.$color.'">'.
-                &html_editable_cell($cell,$color,$allowed).'</td>';
+                &html_editable_cell($cell,$color,$allowed,
+                                    $self->{outputmode} eq 'source').'</td>';
         } else {
 	    $row_html .= '<td bgcolor="#DDCCFF">'.
-                &html_editable_cell($cell,'#DDCCFF',$allowed).'</td>';
+                &html_editable_cell($cell,'#DDCCFF',$allowed,
+                                    $self->{outputmode} eq 'source').'</td>';
         }
     }
     return $row_html;
@@ -1261,14 +1277,15 @@ sub html_template_row {
                 &html_uneditable_cell($cell,'#FFDDDD',$allowed).'</td>';
         } else {
 	    $row_html .= '<td bgcolor="#EOFFDD">'.
-                &html_editable_cell($cell,'#EOFFDD',$allowed).'</td>';
+                &html_editable_cell($cell,'#EOFFDD',$allowed,
+                                    $self->{outputmode} eq 'source').'</td>';
         }
     }
     return $row_html;
 }
 
 sub html_editable_cell {
-    my ($cell,$bgcolor,$allowed) = @_;
+    my ($cell,$bgcolor,$allowed,$showsource) = @_;
     my $result;
     my ($name,$formula,$value);
     if (defined($cell)) {
@@ -1278,7 +1295,13 @@ sub html_editable_cell {
     }
     $name    = '' if (! defined($name));
     $formula = '' if (! defined($formula));
-    if (! defined($value)) {
+    if ($showsource) {
+        if (!defined($formula) || $formula =~ /^\s*$/) {
+            $value = '<font color="'.$bgcolor.'">#</font>';
+        } else {
+            $value = &HTML::Entities::encode($formula, '<>&"');
+        }
+    } elsif (! defined($value)) {
         $value = '<font color="'.$bgcolor.'">#</font>';
         if ($formula ne '') {
             $value = '<i>undefined value</i>';
@@ -1331,7 +1354,8 @@ sub html_row {
 	    $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
 	} else {
 	    $row_html .= '<td bgcolor="#EOFFDD">';
-	    $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed);
+	    $row_html .= &html_editable_cell($cell,'#E0FFDD',$allowed,
+                                             $self->{outputmode} eq 'source');
 	}
 	$row_html .= '</td>';
     }
@@ -1355,6 +1379,8 @@ sub output_options {
               description => 'HTML'},
              {value       => 'excel',
               description => 'Excel'},
+             {value       => 'source',
+              description => 'Show Source'},
 #             {value       => 'xml',
 #              description => 'XML'},
              {value       => 'csv',
@@ -1623,7 +1649,7 @@ sub load {
         $self->{'row_source'}=$spreadsheets{$cachekey}->{'row_source'};
         $self->{'row_numbers'}=$spreadsheets{$cachekey}->{'row_numbers'};
         $self->{'maxrow'}=$spreadsheets{$cachekey}->{'maxrow'};
-   } else {
+    } else {
         # Not cached, need to read
         if (! defined($filename)) {
             $formulas = $self->load_system_default_sheet();
@@ -1656,24 +1682,33 @@ sub load {
                 $formulas = $self->load_system_default_sheet();
             }
         }
-        $filename=$self->filename(); # filename may have changed
-	$cachekey = join('_',($cnum,$cdom,$stype,$filename));
-	if (ref($formulas) eq 'HASH') {
-	    %{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
-	}
 	$self->formulas($formulas);
 	$self->set_row_sources();
 	$self->set_row_numbers();
-	if (ref($self->{'row_source'})) {
-	    %{$spreadsheets{$cachekey}->{'row_source'}} = 
-		%{$self->{'row_source'}};
-	}
-	if (ref($self->{'row_numbers'})) {
-	    %{$spreadsheets{$cachekey}->{'row_numbers'}} = 
-		%{$self->{'row_numbers'}};
-	}
-        $spreadsheets{$cachekey}->{'maxrow'} = $self->{'maxrow'};
+	$self->cache_sheet($formulas);
+    }
+}
+
+sub cache_sheet {
+    my $self = shift;
+    my ($formulas) = @_;
+    my $stype = $self->{'type'};
+    my $cnum  = $self->{'cnum'};
+    my $cdom  = $self->{'cdom'};
+    #
+    my $filename = $self->filename();
+    my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
+
+    if (ref($formulas) eq 'HASH') {
+	%{$spreadsheets{$cachekey}->{'formulas'}} = %{$formulas};
+    }
+    if (ref($self->{'row_source'})) {
+	%{$spreadsheets{$cachekey}->{'row_source'}} =%{$self->{'row_source'}};
+    }
+    if (ref($self->{'row_numbers'})) {
+	%{$spreadsheets{$cachekey}->{'row_numbers'}}=%{$self->{'row_numbers'}};
     }
+    $spreadsheets{$cachekey}->{'maxrow'} = $self->{'maxrow'};
 }
 
 sub set_row_sources {
@@ -1725,9 +1760,8 @@ sub save {
         my $cnum  = $self->{'cnum'};
         my $cdom  = $self->{'cdom'};
         my $filename    = $self->{'filename'};
-        my $cachekey = join('_',($cnum,$cdom,$stype,$filename));
         # Cache new sheet
-        %{$spreadsheets{$cachekey}->{'formulas'}}=%f;
+	$self->cache_sheet(\%f);
         # Write sheet
         foreach (keys(%f)) {
             delete($f{$_}) if ($f{$_} eq 'import');