--- loncom/interface/Attic/lonspreadsheet.pm	2002/11/08 20:18:29	1.137
+++ loncom/interface/Attic/lonspreadsheet.pm	2003/03/19 17:16:23	1.160.2.4
@@ -1,5 +1,5 @@
 #
-# $Id: lonspreadsheet.pm,v 1.137 2002/11/08 20:18:29 matthew Exp $
+# $Id: lonspreadsheet.pm,v 1.160.2.4 2003/03/19 17:16:23 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -53,16 +53,17 @@ built-in functions.
 package Apache::lonspreadsheet;
             
 use strict;
+use Apache::Constants qw(:common :http);
+use Apache::lonnet;
+use Apache::lonhtmlcommon;
+use Apache::loncoursedata;
+use Apache::File();
 use Safe;
 use Safe::Hole;
 use Opcode;
-use Apache::lonnet;
-use Apache::Constants qw(:common :http);
 use GDBM_File;
+use HTML::Entities();
 use HTML::TokeParser;
-use Apache::lonhtmlcommon;
-use Apache::loncoursedata;
-use Apache::File();
 use Spreadsheet::WriteExcel;
 
 #
@@ -832,7 +833,7 @@ sub expandnamed {
             push @matches,$parameter if ($parameter =~ /$expression/);
         }
         if (scalar(@matches) == 0) {
-            $returnvalue = 'unmatched parameter: '.$parameter;
+            $returnvalue = undef; #'unmatched parameter: '.$parameter;
         } elsif (scalar(@matches) == 1) {
             $returnvalue = '$c{\''.$matches[0].'\'}';
         } elsif (scalar(@matches) > 0) {
@@ -960,16 +961,14 @@ ENDDEFS
 sub templaterow {
     my $sheet = shift;
     my @cols=();
-    my $rowlabel = 'Template';
+    my $rowlabel = 'Template</td><td>&nbsp;';
     foreach ('A','B','C','D','E','F','G','H','I','J','K','L','M',
 	     'N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
 	     'a','b','c','d','e','f','g','h','i','j','k','l','m',
 	     'n','o','p','q','r','s','t','u','v','w','x','y','z') {
-        my $fm=$sheet->{'f'}->{'template_'.$_};
-        $fm=~s/[\'\"]/\&\#34;/g;
         push(@cols,{ name    => 'template_'.$_,
-                     formula => $fm,
-                     value   => $fm });
+                     formula => $sheet->{'f'}->{'template_'.$_},
+                     value   => $sheet->{'f'}->{'template_'.$_} });
     }
     return ($rowlabel,@cols);
 }
@@ -982,21 +981,25 @@ sub outrowassess {
     if ($n) {
         my ($usy,$ufn)=split(/__&&&\__/,$sheet->{'f'}->{'A'.$n});
         if (exists($sheet->{'rowlabel'}->{$usy})) {
-            $rowlabel = $sheet->{'rowlabel'}->{$usy};
+            # This is dumb, but we need the information when we output
+            # the html version of the studentcalc spreadsheet for the
+            # links to the assesscalc sheets.
+            $rowlabel = $sheet->{'rowlabel'}->{$usy}.':'.
+                &Apache::lonnet::escape($ufn);
         } else { 
             $rowlabel = '';
         }
+    } elsif ($ENV{'request.role'} =~ /^st\./) {
+        $rowlabel = 'Summary</td><td>0';
     } else {
-        $rowlabel = 'Export';
+        $rowlabel = 'Export</td><td>0';
     }
     foreach ('A','B','C','D','E','F','G','H','I','J','K','L','M',
 	     'N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
 	     'a','b','c','d','e','f','g','h','i','j','k','l','m',
 	     'n','o','p','q','r','s','t','u','v','w','x','y','z') {
-        my $fm=$sheet->{'f'}->{$_.$n};
-        $fm=~s/[\'\"]/\&\#34;/g;
         push(@cols,{ name    => $_.$n,
-                     formula => $fm,
+                     formula => $sheet->{'f'}->{$_.$n},
                      value   => $sheet->{'values'}->{$_.$n}});
     }
     return ($rowlabel,@cols);
@@ -1010,19 +1013,17 @@ sub outrow {
         $rowlabel = $sheet->{'rowlabel'}->{$sheet->{'f'}->{'A'.$n}};
     } else {
         if ($sheet->{'sheettype'} eq 'classcalc') {
-            $rowlabel = 'Summary';
+            $rowlabel = 'Summary</td><td>0';
         } else {
-            $rowlabel = 'Export';
+            $rowlabel = 'Export</td><td>0';
         }
     }
     foreach ('A','B','C','D','E','F','G','H','I','J','K','L','M',
 	     'N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
 	     'a','b','c','d','e','f','g','h','i','j','k','l','m',
 	     'n','o','p','q','r','s','t','u','v','w','x','y','z') {
-        my $fm=$sheet->{'f'}->{$_.$n};
-        $fm=~s/[\'\"]/\&\#34;/g;
         push(@cols,{ name    => $_.$n,
-                     formula => $fm,
+                     formula => $sheet->{'f'}->{$_.$n},
                      value   => $sheet->{'values'}->{$_.$n}});
     }
     return ($rowlabel,@cols);
@@ -1086,6 +1087,44 @@ sub geterrorlog {
     return ${$sheet->{'safe'}->varglob('errorlog')};    
 }
 
+sub gettitle {
+    my $sheet = shift;
+    if ($sheet->{'sheettype'} eq 'classcalc') {
+        return $sheet->{'coursedesc'};
+    } elsif ($sheet->{'sheettype'} eq 'studentcalc') {
+        return 'Grades for '.$sheet->{'uname'}.'@'.$sheet->{'udom'};
+    } elsif ($sheet->{'sheettype'} eq 'assesscalc') {
+        if (($sheet->{'usymb'} eq '_feedback') ||
+            ($sheet->{'usymb'} eq '_evaluation') ||
+            ($sheet->{'usymb'} eq '_discussion') ||
+            ($sheet->{'usymb'} eq '_tutoring')) {
+            my $title = $sheet->{'usymb'};
+            $title =~ s/^_//;
+            $title = ucfirst($title);
+            return $title;
+        }
+        return if (! defined($sheet->{'mapid'}) || 
+                   $sheet->{'mapid'} !~ /^\d+$/);
+        my $mapid = $sheet->{'mapid'};
+        return if (! defined($sheet->{'resid'}) || 
+                   $sheet->{'resid'} !~ /^\d+$/);
+        my $resid = $sheet->{'resid'};
+        my %course_db;
+        tie(%course_db,'GDBM_File',$sheet->{'coursefilename'}.'.db',
+            &GDBM_READER(),0640);
+        return if (! tied(%course_db));
+        my $key = 'title_'.$mapid.'.'.$resid;
+        my $title = '';
+        if (exists($course_db{$key})) {
+            $title = $course_db{$key};
+        } else {
+            $title = $sheet->{'usymb'};
+        }
+        untie (%course_db);
+        return $title;
+    }
+}
+
 # ----------------------------------------------------- Get value of $f{'A'.$n}
 sub getfa {
     my $sheet = shift;
@@ -1111,7 +1150,7 @@ sub exportdata {
 
 
 sub update_student_sheet{
-    my $sheet = shift;
+    my ($sheet,$r,$c) = @_;
     # Load in the studentcalc sheet
     &readsheet($sheet,'default_studentcalc');
     # Determine the structure (contained assessments, etc) of the sheet
@@ -1119,7 +1158,7 @@ sub update_student_sheet{
     # Load in the cached sheets for this student
     &cachedssheets($sheet);
     # Load in the (possibly cached) data from the assessment sheets        
-    &loadstudent($sheet);
+    &loadstudent($sheet,$r,$c);
     # Compute the sheet
     &calcsheet($sheet);
 }
@@ -1148,16 +1187,49 @@ sub get_row {
 ########################################################################
 sub sort_indicies {
     my $sheet = shift;
-    #
-    # Sort the rows in some manner
-    #
-    my @sortby=();
     my @sortidx=();
-    for (my $row=1;$row<=$sheet->{'maxrow'};$row++) {
-        push (@sortby, $sheet->{'safe'}->reval('$f{"A'.$row.'"}'));
-        push (@sortidx, $row);
+    #
+    if ($sheet->{'sheettype'} eq 'classcalc') {
+        my @sortby=(undef);
+        # Skip row 0
+        for (my $row=1;$row<=$sheet->{'maxrow'};$row++) {
+            my (undef,$sname,$sdom,$fullname,$section,$id) = 
+                split(':',$sheet->{'rowlabel'}->{$sheet->{'f'}->{'A'.$row}});
+            push (@sortby, lc($fullname));
+            push (@sortidx, $row);
+        }
+        @sortidx = sort { $sortby[$a] cmp $sortby[$b]; } @sortidx;
+    } elsif ($sheet->{'sheettype'} eq 'studentcalc') {
+        my @sortby1=(undef);
+        my @sortby2=(undef);
+        # Skip row 0
+        for (my $row=1;$row<=$sheet->{'maxrow'};$row++) {
+            my ($key,undef) = split(/__&&&\__/,$sheet->{'f'}->{'A'.$row});
+            my $rowlabel = $sheet->{'rowlabel'}->{$key};
+            my (undef,$symb,$mapid,$resid,$title,$ufn) = 
+                split(':',$rowlabel);
+            $ufn   = &Apache::lonnet::unescape($ufn);
+            $symb  = &Apache::lonnet::unescape($symb);
+            $title = &Apache::lonnet::unescape($title);
+            my ($sequence) = ($symb =~ /\/([^\/]*\.sequence)/);
+            if ($sequence eq '') {
+                $sequence = $symb;
+            }
+            push (@sortby1, $sequence);
+            push (@sortby2, $title);
+            push (@sortidx, $row);
+        }
+        @sortidx = sort { $sortby1[$a] cmp $sortby1[$b] || 
+                              $sortby2[$a] cmp $sortby2[$b] } @sortidx;
+    } else {
+        my @sortby=(undef);
+        # Skip row 0
+        for (my $row=1;$row<=$sheet->{'maxrow'};$row++) {
+            push (@sortby, $sheet->{'safe'}->reval('$f{"A'.$row.'"}'));
+            push (@sortidx, $row);
+        }
+        @sortidx = sort { $sortby[$a] cmp $sortby[$b]; } @sortidx;
     }
-    @sortidx=sort { lc($sortby[$a]) cmp lc($sortby[$b]); } @sortidx;
     return @sortidx;
 }
 
@@ -1186,24 +1258,35 @@ sub html_editable_cell {
         if ($formula ne '') {
             $value = '<i>undefined value</i>';
         }
-    }
-    if ($value =~ /^\s*$/ ) {
+    } elsif ($value =~ /^\s*$/ ) {
         $value = '<font color="'.$bgcolor.'">#</font>';
+    } else {
+        $value = &HTML::Entities::encode($value) if ($value !~/&nbsp;/);
     }
-    $result .= '<a href="javascript:celledit(\''.
-        $name.'\',\''.$formula.'\');">'.$value.'</a>';
+    # Make the formula safe for outputting
+    $formula =~ s/\'/\"/g;
+    # The formula will be parsed by the browser *twice* before being 
+    # displayed to the user for editing.
+    $formula = &HTML::Entities::encode(&HTML::Entities::encode($formula));
+    # Escape newlines so they make it into the edit window
+    $formula =~ s/\n/\\n/gs;
+    # Glue everything together
+    $result .= "<a href=\"javascript:celledit(\'".
+        $name."','".$formula."');\">".$value."</a>";
     return $result;
 }
 
 sub html_uneditable_cell {
     my ($cell,$bgcolor) = @_;
     my $value = (defined($cell) ? $cell->{'value'} : '');
+    $value = &HTML::Entities::encode($value) if ($value !~/&nbsp;/);
     return '&nbsp;'.$value.'&nbsp;';
 }
 
 sub outsheet_html  {
     my ($sheet,$r) = @_;
     my ($num_uneditable,$realm,$row_type);
+    my $requester_is_student = ($ENV{'request.role'} =~ /^st\./);
     if ($sheet->{'sheettype'} eq 'assesscalc') {
         $num_uneditable = 1;
         $realm = 'Assessment';
@@ -1226,7 +1309,7 @@ sub outsheet_html  {
     my $tabledata =<<"END";
 <table border="2">
 <tr>
-  <th colspan="1" rowspan="2"><font size="+2">$realm</font></th>
+  <th colspan="2" rowspan="2"><font size="+2">$realm</font></th>
   <td bgcolor="#FFDDDD" colspan="$num_uneditable">
       <b><font size="+1">Import</font></b></td>
   <td colspan="$num_left">
@@ -1248,35 +1331,39 @@ END
     ####################################
     # Print out template row
     ####################################
-    my ($rowlabel,@rowdata) = &get_row($sheet,'-');
-    my $row_html = '<tr><td>'.&format_html_rowlabel($rowlabel).'</td>';
-    my $num_cols_output = 0;
-    foreach my $cell (@rowdata) {
-        if ($num_cols_output++ < $num_uneditable) {
-            $row_html .= '<td bgcolor="#FFDDDD">';
-            $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
-        } else {
-            $row_html .= '<td bgcolor="#EOFFDD">';
-            $row_html .= &html_editable_cell($cell,'#E0FFDD');
+    my ($num_cols_output,$row_html,$rowlabel,@rowdata);
+    
+    if (! $requester_is_student) {
+        ($rowlabel,@rowdata) = &get_row($sheet,'-');
+        $row_html = '<tr><td>'.&format_html_rowlabel($sheet,$rowlabel).'</td>';
+        $num_cols_output = 0;
+        foreach my $cell (@rowdata) {
+            if ($requester_is_student || 
+                $num_cols_output++ < $num_uneditable) {
+                $row_html .= '<td bgcolor="#FFDDDD">';
+                $row_html .= &html_uneditable_cell($cell,'#FFDDDD');
+            } else {
+                $row_html .= '<td bgcolor="#EOFFDD">';
+                $row_html .= &html_editable_cell($cell,'#E0FFDD');
+            }
+            $row_html .= '</td>';
         }
-        $row_html .= '</td>';
+        $row_html.= "</tr>\n";
+        $r->print($row_html);
     }
-    $row_html.= "</tr>\n";
-    $r->print($row_html);
     ####################################
     # Print out summary/export row
     ####################################
-    my ($rowlabel,@rowdata) = &get_row($sheet,'0');
-    my $rowcount = 0;
-    $row_html = '<tr><td>'.&format_html_rowlabel($rowlabel).'</td>';
+    ($rowlabel,@rowdata) = &get_row($sheet,'0');
+    $row_html = '<tr><td>'.&format_html_rowlabel($sheet,$rowlabel).'</td>';
     $num_cols_output = 0;
     foreach my $cell (@rowdata) {
-        if ($num_cols_output++ < 26) {
+        if ($num_cols_output++ < 26 && ! $requester_is_student) {
             $row_html .= '<td bgcolor="#CCCCFF">';
             $row_html .= &html_editable_cell($cell,'#CCCCFF');
         } else {
             $row_html .= '<td bgcolor="#DDCCFF">';
-            $row_html .= &html_uneditable_cell(undef,'#CCCCFF');
+            $row_html .= &html_uneditable_cell($cell,'#CCCCFF');
         }
         $row_html .= '</td>';
     }
@@ -1293,6 +1380,20 @@ END
     foreach my $rownum (@Rows) {
         my ($rowlabel,@rowdata) = &get_row($sheet,$rownum);
         next if ($rowlabel =~ /^\s*$/);
+        next if (($sheet->{'sheettype'} eq 'assesscalc') && 
+                 (! $ENV{'form.showall'})                &&
+                 ($rowdata[0]->{'value'} =~ /^\s*$/));
+        if (! $ENV{'form.showall'} &&
+            $sheet->{'sheettype'} =~ /^(studentcalc|classcalc)$/) {
+            my $row_is_empty = 1;
+            foreach my $cell (@rowdata) {
+                if ($cell->{'value'} !~  /^\s*$/) {
+                    $row_is_empty = 0;
+                    last;
+                }
+            }
+            next if ($row_is_empty);
+        }
         #
         my $defaultbg='#E0FF';
         #
@@ -1300,25 +1401,28 @@ END
             '</font></b></td>';
         #
         if ($sheet->{'sheettype'} eq 'classcalc') {
-            $row_html.='<td>'.&format_html_rowlabel($rowlabel).'</td>';
+            $row_html.='<td>'.&format_html_rowlabel($sheet,$rowlabel).'</td>';
             # Output links for each student?
-            # Nope, that is already done for us in format_html_rowlabel (for now)
+            # Nope, that is already done for us in format_html_rowlabel 
+            # (for now)
         } elsif ($sheet->{'sheettype'} eq 'studentcalc') {
-            $row_html.='<td>'.&format_html_rowlabel($rowlabel);
+            my $ufn = (split(/:/,$rowlabel))[5];
+            $row_html.='<td>'.&format_html_rowlabel($sheet,$rowlabel);
             $row_html.= '<br>'.
                 '<select name="sel_'.$rownum.'" '.
                     'onChange="changesheet('.$rownum.')">'.
                         '<option name="default">Default</option>';
+
             foreach (@{$sheet->{'othersheets'}}) {
                 $row_html.='<option name="'.$_.'"';
-                #if ($ufn eq $_) {
-                #    $row_html.=' selected';
-                #}
+                if ($ufn eq $_) {
+                    $row_html.=' selected';
+                }
                 $row_html.='>'.$_.'</option>';
             }
             $row_html.='</select></td>';
         } elsif ($sheet->{'sheettype'} eq 'assesscalc') {
-            $row_html.='<td>'.&format_html_rowlabel($rowlabel).'</td>';
+            $row_html.='<td>'.&format_html_rowlabel($sheet,$rowlabel).'</td>';
         }
         #
         my $shown_cells = 0;
@@ -1336,7 +1440,7 @@ END
             $bgcolor='#FFDDDD' if ($shown_cells < $num_uneditable);
             #
             $row_html.='<td bgcolor='.$bgcolor.'>';
-            if ($shown_cells < $num_uneditable) {
+            if ($requester_is_student || $shown_cells < $num_uneditable) {
                 $row_html .= &html_uneditable_cell($cell,$bgcolor);
             } else {
                 $row_html .= &html_editable_cell($cell,$bgcolor);
@@ -1388,7 +1492,7 @@ sub outsheet_csv   {
     foreach my $rownum (@Rows) {
         my ($rowlabel,@rowdata) = &get_row($sheet,$rownum);
         next if ($rowlabel =~ /^\s*$/);
-        push (@Values,&format_csv_rowlabel($rowlabel));
+        push (@Values,&format_csv_rowlabel($sheet,$rowlabel));
         foreach my $cell (@rowdata) {
             push (@Values,'"'.$cell->{'value'}.'"');
         }
@@ -1449,15 +1553,14 @@ A link to the spreadsheet will be availa
 END
     $r->rflush();
     my $starttime = time;
-    foreach (keys(%f)) {
-	next if ($_!~/^A(\d+)/ || $1 == 0 || ($f{$_}=~/^[!~-]/));
+    foreach my $rownum (&sort_indicies($sheet)) {
         $count++;
-        my ($sname,$sdom) = split(':',$f{$_});
+        my ($sname,$sdom) = split(':',$f{'A'.$rownum});
         my $student_excel_worksheet=$workbook->addworksheet($sname.'@'.$sdom);
         # Create a new spreadsheet
         my $studentsheet = &makenewsheet($sname,$sdom,'studentcalc',undef);
         # Read in the spreadsheet definition
-        &update_student_sheet($studentsheet);
+        &update_student_sheet($studentsheet,$r,$c);
         # Stuff the sheet into excel
         &export_sheet_as_excel($studentsheet,$student_excel_worksheet);
         my $totaltime = int((time - $starttime) / $count * $sheet->{'maxrow'});
@@ -1542,25 +1645,57 @@ sub create_excel_spreadsheet {
 sub export_sheet_as_excel {
     my $sheet = shift;
     my $worksheet = shift;
+    #
+    my $rows_output = 0;
+    my $cols_output = 0;
+    ####################################
+    #    Write an identifying row      #
+    ####################################
+    my @Headerinfo = ($sheet->{'coursedesc'});
+    my $title = &gettitle($sheet);
+    $cols_output = 0;    
+    if (defined($title)) {
+        $worksheet->write($rows_output++,$cols_output++,$title);
+    }
+    ####################################
+    #   Write the summary/export row   #
+    ####################################
+    my ($rowlabel,@rowdata) = &get_row($sheet,'0');
+    my $label = &format_excel_rowlabel($sheet,$rowlabel);
+    $cols_output = 0;
+    $worksheet->write($rows_output,$cols_output++,$label);
+    foreach my $cell (@rowdata) {
+        $worksheet->write($rows_output,$cols_output++,$cell->{'value'});
+    }
+    $rows_output+= 2;   # Skip a row, just for fun
     ####################################
     # Prepare to output rows
     ####################################
     my @Rows = &sort_indicies($sheet);
     #
     # Loop through the rows and output them one at a time
-    my $rows_output=0;
     foreach my $rownum (@Rows) {
         my ($rowlabel,@rowdata) = &get_row($sheet,$rownum);
-        next if ($rowlabel =~ /^\s*$/);
-        my $cols_output = 0;
-        my $label = &format_excel_rowlabel($rowlabel);
+        next if ($rowlabel =~ /^[\s]*$/);
+        $cols_output = 0;
+        my $label = &format_excel_rowlabel($sheet,$rowlabel);
+        if ( ! $ENV{'form.showall'} &&
+             $sheet->{'sheettype'} =~ /^(studentcalc|classcalc)$/) {
+            my $row_is_empty = 1;
+            foreach my $cell (@rowdata) {
+                if ($cell->{'value'} !~  /^\s*$/) {
+                    $row_is_empty = 0;
+                    last;
+                }
+            }
+            next if ($row_is_empty);
+        }
         $worksheet->write($rows_output,$cols_output++,$label);
         if (ref($label)) {
             $cols_output = (scalar(@$label));
         }
         foreach my $cell (@rowdata) {
-            $worksheet->write($rows_output,$cols_output++,
-                              $cell->{'value'});
+            $worksheet->write($rows_output,$cols_output++,$cell->{'value'});
         }
         $rows_output++;
     }
@@ -1581,7 +1716,7 @@ sub outsheet_xml   {
 ## Outsheet - calls other outsheet_* functions
 ##
 sub outsheet {
-    my ($r,$sheet)=@_;
+    my ($sheet,$r)=@_;
     if (! exists($ENV{'form.output'})) {
         $ENV{'form.output'} = 'HTML';
     }
@@ -1693,7 +1828,8 @@ sub readsheet {
             if ($fh=Apache::File->new($includedir.'/'.$dfn)) {
                 $sheetxml=join('',<$fh>);
             } else {
-                $sheetxml='<field row="0" col="A">"Error"</field>';
+                # $sheetxml='<field row="0" col="A">"Error"</field>';
+                $sheetxml='<field row="0" col="A"></field>';
             }
             %f=%{&parse_sheet(\$sheetxml)};
         } elsif($fn=~/\/*\.spreadsheet$/) {
@@ -1705,13 +1841,27 @@ sub readsheet {
             }
             %f=%{&parse_sheet(\$sheetxml)};
         } else {
-            my $sheet='';
             my %tmphash = &Apache::lonnet::dump($fn,$cdom,$cnum);
             my ($tmp) = keys(%tmphash);
-            unless ($tmp =~ /^(con_lost|error|no_such_host)/i) {
+            if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
                 foreach (keys(%tmphash)) {
                     $f{$_}=$tmphash{$_};
                 }
+            } else {
+                # Unable to grab the specified spreadsheet,
+                # so we get the default ones instead.
+                $fn = 'default_'.$stype;
+                $sheet->{'filename'} = $fn;
+                my $dfn = $fn;
+                $dfn =~ s/\_/\./g;
+                my $sheetxml;
+                if (my $fh=Apache::File->new($includedir.'/'.$dfn)) {
+                    $sheetxml = join('',<$fh>);
+                } else {
+                    $sheetxml='<field row="0" col="A">'.
+                        '"Unable to load spreadsheet"</field>';
+                }
+                %f=%{&parse_sheet(\$sheetxml)};
             }
         }
         # Cache and set
@@ -1729,14 +1879,24 @@ sub makenewsheet {
     $sheet->{'udom'}  = $udom;
     $sheet->{'sheettype'} = $stype;
     $sheet->{'usymb'} = $usymb;
+    $sheet->{'mapid'} = $ENV{'form.mapid'};
+    $sheet->{'resid'} = $ENV{'form.resid'};
     $sheet->{'cid'}   = $ENV{'request.course.id'};
+    if (! exists($Section{$uname.':'.$udom})) {
+        my $classlist = &Apache::loncoursedata::get_classlist();
+        foreach my $student (keys(%$classlist)) {
+            my ($studentDomain,$studentName,undef,undef,undef,$studentSection,
+                undef,undef)   =   @{$classlist->{$student}};
+            $Section{$studentName.':'.$studentDomain} = $studentSection;
+        }
+    }
     $sheet->{'csec'}  = $Section{$uname.':'.$udom};
     $sheet->{'coursefilename'}   = $ENV{'request.course.fn'};
     $sheet->{'cnum'}  = $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
     $sheet->{'cdom'}  = $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
     $sheet->{'chome'} = $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
     $sheet->{'coursedesc'} = $ENV{'course.'.$ENV{'request.course.id'}.
-                                      'description'};
+                                      '.description'};
     $sheet->{'uhome'} = &Apache::lonnet::homeserver($uname,$udom);
     #
     #
@@ -1783,9 +1943,16 @@ sub writesheet {
                                           $cdom,$cnum);
             if ($reply eq 'ok') {
                 if ($makedef) { 
-                    return &Apache::lonnet::put('environment',
-                                  {'spreadsheet_default_'.$stype => $fn },
-                                                $cdom,$cnum);
+                    $reply = &Apache::lonnet::put('environment',
+                                    {'spreadsheet_default_'.$stype => $fn },
+                                                  $cdom,$cnum);
+                    if ($reply eq 'ok' && 
+                        ($sheet->{'sheettype'} eq 'studentcalc' ||
+                         $sheet->{'sheettype'} eq 'assesscalc')) {
+                        # Expire the spreadsheets of the other students.
+                        &Apache::lonnet::expirespread('','','studentcalc','');
+                    }
+                    return $reply;
                 } 
                 return $reply;
             } 
@@ -1808,7 +1975,10 @@ sub tmpwrite {
     $fn=$tmpdir.$fn.'.tmp';
     my $fh;
     if ($fh=Apache::File->new('>'.$fn)) {
-	print $fh join("\n",&getformulas($sheet));
+        my %f = &getformulas($sheet);
+        while( my ($cell,$formula) = each(%f)) {
+            print $fh &Apache::lonnet::escape($cell)."=".&Apache::lonnet::escape($formula)."\n";
+        }
     }
 }
 
@@ -1824,32 +1994,36 @@ sub tmpread {
     my %fo=();
     my $countrows=0;
     if ($fh=Apache::File->new($fn)) {
-        my $name;
-        while ($name=<$fh>) {
-	    chomp($name);
-            my $value=<$fh>;
-            chomp($value);
-            $fo{$name}=$value;
-            if ($name=~/^A(\d+)$/) {
-		if ($1>$countrows) {
-		    $countrows=$1;
-                }
-            }
-        }
-    }
+        while (<$fh>) {
+	    chomp;
+            my ($cell,$formula) = split(/=/);
+            $cell    = &Apache::lonnet::unescape($cell);
+            $formula = &Apache::lonnet::unescape($formula);
+            $fo{$cell} = $formula;
+        }
+    }
+#            chomp($value);
+#            $fo{$name}=$value;
+#            if ($name=~/^A(\d+)$/) {
+#		if ($1>$countrows) {
+#		    $countrows=$1;
+#                }
+#            }
+#        }
+#    }
     if ($nform eq 'changesheet') {
         $fo{'A'.$nfield}=(split(/__&&&\__/,$fo{'A'.$nfield}))[0];
         unless ($ENV{'form.sel_'.$nfield} eq 'Default') {
 	    $fo{'A'.$nfield}.='__&&&__'.$ENV{'form.sel_'.$nfield};
         }
-    } elsif ($nfield eq 'insertrow') {
-        $countrows++;
-        my $newrow=substr('000000'.$countrows,-7);
-        if ($nform eq 'top') {
-	    $fo{'A'.$countrows}='--- '.$newrow;
-        } else {
-            $fo{'A'.$countrows}='~~~ '.$newrow;
-        }
+#    } elsif ($nfield eq 'insertrow') {
+#        $countrows++;
+#        my $newrow=substr('000000'.$countrows,-7);
+#        if ($nform eq 'top') {
+#	    $fo{'A'.$countrows}='--- '.$newrow;
+#        } else {
+#            $fo{'A'.$countrows}='~~~ '.$newrow;
+#        }
     } else {
        if ($nfield) { $fo{$nfield}=$nform; }
     }
@@ -1928,8 +2102,27 @@ sub parmval {
     # second, check map parms
     my $thisparm = $parmhash{$symbparm};
     return $thisparm if (defined($thisparm));
+
     # first, check default
-    return &Apache::lonnet::metadata($fn,$rwhat.'.default');
+    $thisparm = &Apache::lonnet::metadata($fn,$rwhat.'.default');
+    return $thisparm if (defined($thisparm));
+
+    #Cascade Up
+    my $space=$what;
+    $space=~s/\.\w+$//;
+    if ($space ne '0') {
+	my @parts=split(/_/,$space);
+	my $id=pop(@parts);
+	my $part=join('_',@parts);
+	if ($part eq '') { $part='0'; }
+	my $newwhat=$rwhat;
+	$newwhat=~s/\Q$space\E/$part/;
+	my $partgeneral=&parmval($newwhat,$sheet);
+	if (defined($partgeneral)) { return $partgeneral; }
+    }
+
+    #nothing defined
+    return '';
 }
 
 
@@ -1937,17 +2130,26 @@ sub parmval {
 ##                  Row label formatting routines               ##
 ##################################################################
 sub format_html_rowlabel {
+    my $sheet = shift;
     my $rowlabel = shift;
     return '' if ($rowlabel eq '');
     my ($type,$labeldata) = split(':',$rowlabel,2);
     my $result = '';
     if ($type eq 'symb') {
-        my ($symb,$uname,$udom,$title) = split(':',$labeldata);
-        $symb = &Apache::lonnet::unescape($symb);
+        my ($symb,$mapid,$resid,$title,$ufn) = split(':',$labeldata);
+        $ufn   = 'default' if (!defined($ufn) || $ufn eq '');
+        $ufn   = &Apache::lonnet::unescape($ufn);
+        $symb  = &Apache::lonnet::unescape($symb);
+        $title = &Apache::lonnet::unescape($title);
         $result = '<a href="/adm/assesscalc?usymb='.$symb.
-            '&uname='.$uname.'&udom='.$udom.'">'.$title.'</a>';
+            '&uname='.$sheet->{'uname'}.'&udom='.$sheet->{'udom'}.
+                '&ufn='.$ufn.
+                    '&mapid='.$mapid.'&resid='.$resid.'">'.$title.'</a>';
     } elsif ($type eq 'student') {
         my ($sname,$sdom,$fullname,$section,$id) = split(':',$labeldata);
+        if ($fullname =~ /^\s*$/) {
+            $fullname = $sname.'@'.$sdom;
+        }
         $result ='<a href="/adm/studentcalc?uname='.$sname.
             '&udom='.$sdom.'">';
         $result.=$section.'&nbsp;'.$id."&nbsp;".$fullname.'</a>';
@@ -1960,13 +2162,16 @@ sub format_html_rowlabel {
 }
 
 sub format_csv_rowlabel {
+    my $sheet = shift;
     my $rowlabel = shift;
     return '' if ($rowlabel eq '');
     my ($type,$labeldata) = split(':',$rowlabel,2);
     my $result = '';
     if ($type eq 'symb') {
-        my ($symb,$uname,$udom,$title) = split(':',$labeldata);
-        $symb = &Apache::lonnet::unescape($symb);
+        my ($symb,$mapid,$resid,$title,$ufn) = split(':',$labeldata);
+        $ufn   = &Apache::lonnet::unescape($ufn);
+        $symb  = &Apache::lonnet::unescape($symb);
+        $title = &Apache::lonnet::unescape($title);
         $result = $title;
     } elsif ($type eq 'student') {
         my ($sname,$sdom,$fullname,$section,$id) = split(':',$labeldata);
@@ -1981,13 +2186,16 @@ sub format_csv_rowlabel {
 }
 
 sub format_excel_rowlabel {
+    my $sheet = shift;
     my $rowlabel = shift;
     return '' if ($rowlabel eq '');
     my ($type,$labeldata) = split(':',$rowlabel,2);
     my $result = '';
     if ($type eq 'symb') {
-        my ($symb,$uname,$udom,$title) = split(':',$labeldata);
-        $symb = &Apache::lonnet::unescape($symb);
+        my ($symb,$mapid,$resid,$title,$ufn) = split(':',$labeldata);
+        $ufn   = &Apache::lonnet::unescape($ufn);
+        $symb  = &Apache::lonnet::unescape($symb);
+        $title = &Apache::lonnet::unescape($title);
         $result = $title;
     } elsif ($type eq 'student') {
         my ($sname,$sdom,$fullname,$section,$id) = split(':',$labeldata);
@@ -2024,6 +2232,7 @@ sub updateclasssheet {
     foreach my $student (keys(%$classlist)) {
         my ($studentDomain,$studentName,$end,$start,$id,$studentSection,
             $fullname,$status)   =   @{$classlist->{$student}};
+        $Section{$studentName.':'.$studentDomain} = $studentSection;
         if ($ENV{'form.Status'} eq $status || $ENV{'form.Status'} eq 'Any') {
             $currentlist{$student}=join(':',('student',$studentName,
                                              $studentDomain,$fullname,
@@ -2094,10 +2303,11 @@ sub get_student_rowlabels {
             return 'Could not access course data';
         }
         #
-        my %assesslist;
+        my %assesslist = ();
         foreach ('Feedback','Evaluation','Tutoring','Discussion') {
             my $symb = '_'.lc($_);
-            $assesslist{$symb} = join(':',('symb',$symb,$uname,$udom,$_));
+            $assesslist{$symb} = join(':',('symb',$symb,0,0,
+                                           &Apache::lonnet::escape($_)));
         }
         #
         while (my ($key,$srcf) = each(%course_db)) {
@@ -2109,8 +2319,9 @@ sub get_student_rowlabels {
                 my $symb=
                     &Apache::lonnet::declutter($course_db{'map_id_'.$mapid}).
                         '___'.$resid.'___'.&Apache::lonnet::declutter($srcf);
-                $assesslist{$symb}='symb:'.&Apache::lonnet::escape($symb).':'
-                    .$uname.':'.$udom.':'.$course_db{'title_'.$id};
+                $assesslist{$symb} ='symb:'.&Apache::lonnet::escape($symb).':'
+                    .$mapid.':'.$resid.':'.
+                        &Apache::lonnet::escape($course_db{'title_'.$id});
             }
         }
         untie(%course_db);
@@ -2198,7 +2409,8 @@ sub updatestudentassesssheet {
     $sheet->{'maxrow'} = 0;
     my %existing=();
     # Now obsolete rows
-    while (my ($cell, $formula) = each (%f)) {
+    foreach my $cell (keys(%f)) {
+        my $formula = $f{$cell};
         next if ($cell !~ /^A(\d+)/);
         $sheet->{'maxrow'} = $1 if ($1 > $sheet->{'maxrow'});
         my ($usy,$ufn)=split(/__&&&\__/,$formula);
@@ -2206,12 +2418,8 @@ sub updatestudentassesssheet {
         unless ((exists($sheet->{'rowlabel'}->{$usy}) && 
                  (defined($sheet->{'rowlabel'}->{$usy})) || (!$1) ||
                  ($formula =~ /^(~~~|---)/) )) {
-            $f{$_}='!!! Obsolete';
+            $f{$cell}='!!! Obsolete';
             $changed=1;
-        } elsif ($ufn) {
-            # I do not think this works any more
-            $sheet->{'rowlabel'}->{$usy}
-                =~s/assesscalc\?usymb\=/assesscalc\?ufn\=$ufn&\usymb\=/;
         }
     }
     # New and unknown keys
@@ -2231,9 +2439,9 @@ sub updatestudentassesssheet {
 # ------------------------------------------------ Load data for one assessment
 
 sub loadstudent{
-    my ($sheet)=@_;
-    my %c=();
-    my %f=&getformulas($sheet);
+    my ($sheet,$r,$c)=@_;
+    my %constants=();
+    my %formulas=&getformulas($sheet);
     $cachedassess=$sheet->{'uname'}.':'.$sheet->{'udom'};
     # Get ALL the student preformance data
     my @tmp = &Apache::lonnet::dump($sheet->{'cid'},
@@ -2246,50 +2454,51 @@ sub loadstudent{
     undef @tmp;
     # 
     my @assessdata=();
-    while (my ($cell,$value) = each (%f)) {
+    foreach my $cell (keys(%formulas)) {
+        my $value = $formulas{$cell};
+        if(defined($c) && ($c->aborted())) {
+            last;
+        }
 	next if ($cell !~ /^A(\d+)/);
         my $row=$1;
         next if (($value =~ /^[!~-]/) || ($row==0));
         my ($usy,$ufn)=split(/__&&&\__/,$value);
         @assessdata=&exportsheet($sheet,$sheet->{'uname'},
                                  $sheet->{'udom'},
-                                 'assesscalc',$usy,$ufn);
+                                 'assesscalc',$usy,$ufn,$r);
         my $index=0;
-        foreach ('A','B','C','D','E','F','G','H','I','J','K','L','M',
-                 'N','O','P','Q','R','S','T','U','V','W','X','Y','Z') {
+        foreach my $col ('A','B','C','D','E','F','G','H','I','J','K','L','M',
+                         'N','O','P','Q','R','S','T','U','V','W','X','Y','Z') {
             if (defined($assessdata[$index])) {
-                my $col=$_;
                 if ($assessdata[$index]=~/\D/) {
-                    $c{$col.$row}="'".$assessdata[$index]."'";
+                    $constants{$col.$row}="'".$assessdata[$index]."'";
                 } else {
-                    $c{$col.$row}=$assessdata[$index];
-                }
-                unless ($col eq 'A') { 
-                    $f{$col.$row}='import';
+                    $constants{$col.$row}=$assessdata[$index];
                 }
+                $formulas{$col.$row}='import' if ($col ne 'A');
             }
             $index++;
         }
     }
     $cachedassess='';
     undef %cachedstores;
-    $sheet->{'f'} = \%f;
+    $sheet->{'f'} = \%formulas;
     &setformulas($sheet);
-    &setconstants($sheet,\%c);
+    &setconstants($sheet,\%constants);
 }
 
 # --------------------------------------------------- Load data for one student
 #
 sub loadcourse {
-    my ($sheet,$r)=@_;
+    my ($sheet,$r,$c)=@_;
     #
-    my %c=();
-    my %f=&getformulas($sheet);
+    my %constants=();
+    my %formulas=&getformulas($sheet);
     #
     my $total=0;
-    foreach (keys(%f)) {
+    foreach (keys(%formulas)) {
 	if ($_=~/^A(\d+)/) {
-	    unless ($f{$_}=~/^[\!\~\-]/) { $total++; }
+	    unless ($formulas{$_}=~/^[\!\~\-]/) { $total++; }
         }
     }
     my $now=0;
@@ -2306,12 +2515,16 @@ sub loadcourse {
 </script>
 ENDPOP
     $r->rflush();
-    foreach (keys(%f)) {
+    foreach (keys(%formulas)) {
+        if(defined($c) && ($c->aborted())) {
+            last;
+        }
 	next if ($_!~/^A(\d+)/);
         my $row=$1;
-        next if (($f{$_}=~/^[\!\~\-]/)  || ($row==0));
-        my ($sname,$sdom) = split(':',$f{$_});
-        my @studentdata=&exportsheet($sheet,$sname,$sdom,'studentcalc');
+        next if (($formulas{$_}=~/^[\!\~\-]/)  || ($row==0));
+        my ($sname,$sdom) = split(':',$formulas{$_});
+        my @studentdata=&exportsheet($sheet,$sname,$sdom,'studentcalc',
+                                     undef,undef,$r);
         undef %userrdatas;
         $now++;
         $r->print('<script>popwin.document.popremain.remaining.value="'.
@@ -2325,20 +2538,20 @@ ENDPOP
             if (defined($studentdata[$index])) {
                 my $col=$_;
                 if ($studentdata[$index]=~/\D/) {
-                    $c{$col.$row}="'".$studentdata[$index]."'";
+                    $constants{$col.$row}="'".$studentdata[$index]."'";
                 } else {
-                    $c{$col.$row}=$studentdata[$index];
+                    $constants{$col.$row}=$studentdata[$index];
                 }
                 unless ($col eq 'A') { 
-                    $f{$col.$row}='import';
+                    $formulas{$col.$row}='import';
                 }
             } 
             $index++;
         }
     }
-    $sheet->{'f'}=\%f;
+    $sheet->{'f'}=\%formulas;
     &setformulas($sheet);
-    &setconstants($sheet,\%c);
+    &setconstants($sheet,\%constants);
     $r->print('<script>popwin.close()</script>');
     $r->rflush(); 
 }
@@ -2346,7 +2559,7 @@ ENDPOP
 # ------------------------------------------------ Load data for one assessment
 #
 sub loadassessment {
-    my ($sheet)=@_;
+    my ($sheet,$r,$c)=@_;
 
     my $uhome = $sheet->{'uhome'};
     my $uname = $sheet->{'uname'};
@@ -2510,13 +2723,14 @@ sub updatesheet {
 
 sub loadrows {
     my ($sheet,$r)=@_;
+    my $c = $r->connection;
     my $stype=$sheet->{'sheettype'};
     if ($stype eq 'classcalc') {
-	&loadcourse($sheet,$r);
+	&loadcourse($sheet,$r,$c);
     } elsif ($stype eq 'studentcalc') {
-        &loadstudent($sheet);
+        &loadstudent($sheet,$r,$c);
     } else {
-        &loadassessment($sheet);
+        &loadassessment($sheet,$r,$c);
     }
 }
 
@@ -2524,7 +2738,11 @@ sub loadrows {
 
 sub checkthis {
     my ($keyname,$time)=@_;
-    return ($time<$expiredates{$keyname});
+    if (! exists($expiredates{$keyname})) {
+        return 0;
+    } else {
+        return ($time<$expiredates{$keyname});
+    }
 }
 
 sub forcedrecalc {
@@ -2542,7 +2760,7 @@ sub forcedrecalc {
             &checkthis($uname.':'.$udom.':assesscalc:'.$map,$time) ||
             &checkthis($uname.':'.$udom.':assesscalc:'.$usymb,$time)) {
             return 1;
-        } 
+        }
     } else {
         if (&checkthis('::studentcalc:',$time) || 
             &checkthis($uname.':'.$udom.':studentcalc:',$time)) {
@@ -2557,11 +2775,13 @@ sub forcedrecalc {
 # returns the export row for a spreadsheet.
 #
 sub exportsheet {
-    my ($sheet,$uname,$udom,$stype,$usymb,$fn)=@_;
+    my ($sheet,$uname,$udom,$stype,$usymb,$fn,$r)=@_;
+    my $flag = 0;
     $uname = $uname || $sheet->{'uname'};
     $udom  = $udom  || $sheet->{'udom'};
     $stype = $stype || $sheet->{'sheettype'};
     my @exportarr=();
+    # This handles the assessment sheets for '_feedback', etc
     if (defined($usymb) && ($usymb=~/^\_(\w+)/) && 
         (!defined($fn) || $fn eq '')) {
         $fn='default_'.$1;
@@ -2611,7 +2831,7 @@ sub exportsheet {
     my ($newsheet)=&makenewsheet($uname,$udom,$stype,$usymb);
     &readsheet($newsheet,$fn);
     &updatesheet($newsheet);
-    &loadrows($newsheet);
+    &loadrows($newsheet,$r);
     &calcsheet($newsheet); 
     @exportarr=&exportdata($newsheet);
     ##
@@ -2626,14 +2846,24 @@ sub exportsheet {
                                        [$key],
                                        $sheet->{'cdom'},$sheet->{'cnum'});
         if ($tmp[0]!~/^error/) {
-            %currentlystored = @tmp;
+            # We only got one key, so we will access it directly.
+            foreach (split('___&___',$tmp[1])) {
+                my ($key,$value) = split('___=___',$_);
+                $key = '' if (! defined($key));
+                $currentlystored{$key} = $value;
+            }
         }
     } else {
         my @tmp = &Apache::lonnet::get('nohist_calculatedsheets_'.
                                        $sheet->{'cid'},[$key],
                                        $sheet->{'udom'},$sheet->{'uname'});
         if ($tmp[0]!~/^error/) {
-            %currentlystored = @tmp;
+            # We only got one key, so we will access it directly.
+            foreach (split('___&___',$tmp[1])) {
+                my ($key,$value) = split('___=___',$_);
+                $key = '' if (! defined($key));
+                $currentlystored{$key} = $value;
+            }
         }
     }
     #
@@ -2652,17 +2882,19 @@ sub exportsheet {
     #
     # Store away the new value
     #
+    my $timekey = $key.'.time';
     if ($stype eq 'studentcalc') {
-        &Apache::lonnet::put('nohist_calculatedsheets',
-                             { $key => $newstore,
-                               $key.time => $now },
-                             $sheet->{'cdom'},$sheet->{'cnum'});
-    } else {
-        &Apache::lonnet::put('nohist_calculatedsheets_'.$sheet->{'cid'},
-                             { $key => $newstore,
-                               $key.time => $now },
-                             $sheet->{'udom'},
-                             $sheet->{'uname'})
+        my $result = &Apache::lonnet::put('nohist_calculatedsheets',
+                                          { $key     => $newstore,
+                                            $timekey => $now },
+                                          $sheet->{'cdom'},
+                                          $sheet->{'cnum'});
+    } else {
+        my $result = &Apache::lonnet::put('nohist_calculatedsheets_'.$sheet->{'cid'},
+                                          { $key     => $newstore,
+                                            $timekey => $now },
+                                          $sheet->{'udom'},
+                                          $sheet->{'uname'});
     }
     return @exportarr;
 }
@@ -2677,7 +2909,7 @@ sub load_spreadsheet_expirationdates {
     my @tmp = &Apache::lonnet::dump('nohist_expirationdates',
                                     $ENV{'course.'.$cid.'.domain'},
                                     $ENV{'course.'.$cid.'.num'});
-    if (lc($tmp[0])!~/^error/){
+    if (lc($tmp[0]) !~ /^error/){
         %expiredates = @tmp;
     }
 }
@@ -2710,7 +2942,8 @@ sub cachedssheets {
     $uname = $uname || $sheet->{'uname'};
     $udom  = $udom  || $sheet->{'udom'};
     if (! $loadedcaches{$uname.'_'.$udom}) {
-        my @tmp = &Apache::lonnet::dump('nohist_calculatedsheets',
+        my @tmp = &Apache::lonnet::dump('nohist_calculatedsheets_'.
+                                        $ENV{'request.course.id'},
                                         $sheet->{'udom'},
                                         $sheet->{'uname'});
         if ($tmp[0] !~ /^error/) {
@@ -2785,8 +3018,8 @@ sub handler {
     #
     # Get query string for limited number of parameters
     #
-    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
-                                            ['uname','udom','usymb','ufn']);
+    &Apache::loncommon::get_unprocessed_cgi
+        ($ENV{'QUERY_STRING'},['uname','udom','usymb','ufn','mapid','resid']);
     #
     # Deal with restricted student permissions 
     #
@@ -2795,11 +3028,16 @@ sub handler {
         delete $ENV{'form.unewformula'} if (exists($ENV{'form.unewformula'}));
     }
     #
-    # Clean up symb and spreadsheet filename
+    # Look for special assessment spreadsheets - '_feedback', etc.
     #
-    if (($ENV{'form.usymb'}=~/^\_(\w+)/) && (!$ENV{'form.ufn'})) {
+    if (($ENV{'form.usymb'}=~/^\_(\w+)/) && (!$ENV{'form.ufn'} || 
+                                             $ENV{'form.ufn'} eq '' || 
+                                             $ENV{'form.ufn'} eq 'default')) {
         $ENV{'form.ufn'}='default_'.$1;
     }
+#    if (!$ENV{'form.ufn'} || $ENV{'form.ufn'} eq 'default') {
+#        $ENV{'form.ufn'}='course_default_'.$sheettype;
+#    }
     #
     # Interactive loading of specific sheet?
     #
@@ -2828,17 +3066,47 @@ sub handler {
     # Header....
     #
     $r->print('<html><head><title>LON-CAPA Spreadsheet</title>');
+    my $nothing = "''";
+    if ($ENV{'browser.type'} eq 'explorer') {
+        $nothing = "'javascript:void(0);'";
+    }
+
     if ($ENV{'request.role'} !~ /^st\./) {
         $r->print(<<ENDSCRIPT);
 <script language="JavaScript">
 
-    function celledit(cn,cf) {
-        var cnf=prompt(cn,cf);
-        if (cnf!=null) {
-            document.sheet.unewfield.value=cn;
-            document.sheet.unewformula.value=cnf;
-            document.sheet.submit();
+    var editwin;
+
+    function celledit(cellname,cellformula) {
+        var edit_text = '';
+        // cellformula may contain less-than and greater-than symbols, so
+        // we need to escape them?  
+        edit_text +='<html><head><title>Cell Edit Window</title></head><body>';
+        edit_text += '<form name="editwinform">';
+        edit_text += '<center><h3>Cell '+cellname+'</h3>';
+        edit_text += '<textarea name="newformula" cols="40" rows="6"';
+        edit_text += ' wrap="off" >'+cellformula+'</textarea>';
+        edit_text += '</br>';
+        edit_text += '<input type="button" name="accept" value="Accept"';
+        edit_text += ' onClick=\\\'javascript:';
+        edit_text += 'opener.document.sheet.unewfield.value=';
+        edit_text +=     '"'+cellname+'";';
+        edit_text += 'opener.document.sheet.unewformula.value=';
+        edit_text +=     'document.editwinform.newformula.value;';
+        edit_text += 'opener.document.sheet.submit();';
+        edit_text += 'self.close()\\\' />';
+        edit_text += '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
+        edit_text += '<input type="button" name="abort" ';
+        edit_text +=     'value="Discard Changes"';
+        edit_text += ' onClick="javascript:self.close()" />';
+        edit_text += '</center></body></html>';
+
+        if (editwin != null && !(editwin.closed) ) {
+            editwin.close();
         }
+
+        editwin = window.open($nothing,'CellEditWin','height=200,width=350,scrollbars=no,resizeable=yes,alwaysRaised=yes,dependent=yes',true);
+        editwin.document.write(edit_text);
     }
 
     function changesheet(cn) {
@@ -2857,7 +3125,7 @@ sub handler {
 ENDSCRIPT
     }
     $r->print('</head>'.&Apache::loncommon::bodytag('Grades Spreadsheet').
-              '<form action="'.$r->uri.'" name=sheet method=post>');
+              '<form action="'.$r->uri.'" name="sheet" method="post">');
     $r->print(&hiddenfield('uname',$ENV{'form.uname'}).
               &hiddenfield('udom',$ENV{'form.udom'}).
               &hiddenfield('usymb',$ENV{'form.usymb'}).
@@ -2878,12 +3146,37 @@ ENDSCRIPT
     # Read new sheet or modified worksheet
     my ($sheet)=&makenewsheet($aname,$adom,$sheettype,$ENV{'form.usymb'});
     #
+    # Check user permissions
+    if (($sheet->{'sheettype'} eq 'classcalc'       ) || 
+        ($sheet->{'uname'}     ne $ENV{'user.name'} ) ||
+        ($sheet->{'udom'}      ne $ENV{'user.domain'})) {
+        unless (&Apache::lonnet::allowed('vgr',$sheet->{'cid'})) {
+            $r->print('<h1>Access Permission Denied</h1>'.
+                      '</form></body></html>');
+            return OK;
+        }
+    }
+    # Print out user information
+    $r->print('<h2>'.$sheet->{'coursedesc'}.'</h2>');
+    if ($sheet->{'sheettype'} ne 'classcalc') {
+        $r->print('<h2>'.&gettitle($sheet).'</h2><p>');
+    }
+    if ($sheet->{'sheettype'} eq 'assesscalc') {
+        $r->print('<b>User:</b> '.$sheet->{'uname'}.
+                  '<br /><b>Domain:</b> '.$sheet->{'udom'}.'<br />');
+    }
+    if ($sheet->{'sheettype'} eq 'studentcalc' || 
+        $sheet->{'sheettype'} eq 'assesscalc') {
+        $r->print('<b>Section/Group:</b>'.$sheet->{'csec'}.'</p>');
+    } 
+    #
     # If a new formula had been entered, go from work copy
     if ($ENV{'form.unewfield'}) {
         $r->print('<h2>Modified Workcopy</h2>');
-        $ENV{'form.unewformula'}=~s/\'/\"/g;
-        $r->print('<p>New formula: '.$ENV{'form.unewfield'}.'='.
-                  $ENV{'form.unewformula'}.'<p>');
+        #$ENV{'form.unewformula'}=~s/\'/\"/g;
+        $r->print('<p>Cell '.$ENV{'form.unewfield'}.' = <pre>');
+        $r->print(&HTML::Entities::encode($ENV{'form.unewformula'}).
+                  '</pre></p>');
         $sheet->{'filename'} = $ENV{'form.ufn'};
         &tmpread($sheet,$ENV{'form.unewfield'},$ENV{'form.unewformula'});
     } elsif ($ENV{'form.saveas'}) {
@@ -2892,43 +3185,23 @@ ENDSCRIPT
     } else {
         &readsheet($sheet,$ENV{'form.ufn'});
     }
-    # Print out user information
-    if ($sheet->{'sheettype'} ne 'classcalc') {
-        $r->print('<p><b>User:</b> '.$sheet->{'uname'}.
-                  '<br><b>Domain:</b> '.$sheet->{'udom'});
-        $r->print('<br><b>Section/Group:</b> '.$sheet->{'csec'});
-        if ($ENV{'form.usymb'}) {
-            $r->print('<br><b>Assessment:</b> <tt>'.
-                      $ENV{'form.usymb'}.'</tt>');
-        }
-    }
-    #
-    # Check user permissions
-    if (($sheet->{'sheettype'} eq 'classcalc'       ) || 
-        ($sheet->{'uname'}     ne $ENV{'user.name'} ) ||
-        ($sheet->{'udom'}      ne $ENV{'user.domain'})) {
-        unless (&Apache::lonnet::allowed('vgr',$sheet->{'cid'})) {
-            $r->print('<h1>Access Permission Denied</h1>'.
-                      '</form></body></html>');
-            return OK;
-        }
-    }
     # Additional options
-    $r->print('<br />'.
-              '<input type="submit" name="forcerecalc" '.
-              'value="Completely Recalculate Sheet"><p>');
     if ($sheet->{'sheettype'} eq 'assesscalc') {
         $r->print('<p><font size=+2>'.
                   '<a href="/adm/studentcalc?'.
                   'uname='.$sheet->{'uname'}.
                   '&udom='.$sheet->{'udom'}.'">'.
-                  'Level up: Student Sheet</a></font><p>');
+                  'Level up: Student Sheet</a></font></p>');
     }
     if (($sheet->{'sheettype'} eq 'studentcalc') && 
         (&Apache::lonnet::allowed('vgr',$sheet->{'cid'}))) {
         $r->print ('<p><font size=+2><a href="/adm/classcalc">'.
-                   'Level up: Course Sheet</a></font><p>');
+                   'Level up: Course Sheet</a></font></p>');
     }
+    # Recalc button
+    $r->print('<br />'.
+              '<input type="submit" name="forcerecalc" '.
+              'value="Completely Recalculate Sheet"></p>');
     # Save dialog
     if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
         my $fname=$ENV{'form.ufn'};
@@ -2966,6 +3239,7 @@ ENDSCRIPT
         $oldsheets{'course'} ne $sheet->{'cid'}) {
         undef %oldsheets;
         undef %loadedcaches;
+        undef %Section;
     }
     $oldsheets{'course'} = $sheet->{'cid'};
     #
@@ -3008,12 +3282,12 @@ ENDSCRIPT
     }
     #
     # Write the modified worksheet
-    $r->print('<b>Current sheet:</b> '.$sheet->{'filename'}.'<p>');
+    $r->print('<b>Current sheet:</b> '.$sheet->{'filename'}.'</p>');
     &tmpwrite($sheet);
-    if ($sheet->{'sheettype'} eq 'studentcalc') {
-        $r->print('<br>Show rows with empty A column: ');
+    if ($sheet->{'sheettype'} eq 'assesscalc') {
+        $r->print('<p>Show rows with empty A column: ');
     } else {
-        $r->print('<br>Show empty rows: ');
+        $r->print('<p>Show empty rows: ');
     }
     #
     $r->print(&hiddenfield('userselhidden','true').
@@ -3032,8 +3306,8 @@ ENDSCRIPT
     }
     $r->print('>');
     #
-    # CSV format checkbox (classcalc sheets only)
-    $r->print(' Output as <select name="output" size="1" onClick="submit()">'.
+    # output format select box 
+    $r->print(' Output as <select name="output" size="1" onChange="submit()">'.
               "\n");
     foreach my $mode (qw/HTML CSV Excel/) {
         $r->print('<option value="'.$mode.'"');
@@ -3042,13 +3316,18 @@ ENDSCRIPT
         } 
         $r->print('>'.$mode.'</option>'."\n");
     }
-    if ($sheet->{'sheettype'} eq 'classcalc') {
-        $r->print('<option value="recursive excel"');
-        if ($ENV{'form.output'} eq 'recursive excel') {
-            $r->print(' selected ');
-        } 
-        $r->print(">Multi-Sheet Excel</option>\n");
-    }
+#
+#    Mulit-sheet excel takes too long and does not work at all for large
+#    classes.  Future inclusion of this option may be possible with the
+#    Spreadsheet::WriteExcel::Big and speed improvements.
+#
+#    if ($sheet->{'sheettype'} eq 'classcalc') {
+#        $r->print('<option value="recursive excel"');
+#        if ($ENV{'form.output'} eq 'recursive excel') {
+#            $r->print(' selected ');
+#        } 
+#        $r->print(">Multi-Sheet Excel</option>\n");
+#    }
     $r->print("</select>\n");
     #
     if ($sheet->{'sheettype'} eq 'classcalc') {
@@ -3066,7 +3345,7 @@ ENDSCRIPT
 #value='Insert Row Bottom'><br>
 #ENDINSERTBUTTONS
     # Print out sheet
-    &outsheet($r,$sheet);
+    &outsheet($sheet,$r);
     $r->print('</form></body></html>');
     #  Done
     return OK;
@@ -3074,3 +3353,5 @@ ENDSCRIPT
 
 1;
 __END__
+
+