--- loncom/interface/Attic/lonspreadsheet.pm	2002/09/16 20:09:45	1.110
+++ loncom/interface/Attic/lonspreadsheet.pm	2002/10/22 13:09:49	1.120
@@ -1,5 +1,5 @@
 #
-# $Id: lonspreadsheet.pm,v 1.110 2002/09/16 20:09:45 www Exp $
+# $Id: lonspreadsheet.pm,v 1.120 2002/10/22 13:09:49 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -61,6 +61,12 @@ use Apache::Constants qw(:common :http);
 use GDBM_File;
 use HTML::TokeParser;
 use Apache::lonhtmlcommon;
+use Apache::loncoursedata;
+#
+# Caches for coursewide information 
+#
+my %Section;
+
 #
 # Caches for previously calculated spreadsheets
 #
@@ -111,60 +117,9 @@ my $tmpdir;
 # =============================================================================
 # ===================================== Implements an instance of a spreadsheet
 
-sub initsheet {
-    my $safeeval = new Safe(shift);
-    my $safehole = new Safe::Hole;
-    $safeeval->permit("entereval");
-    $safeeval->permit(":base_math");
-    $safeeval->permit("sort");
-    $safeeval->deny(":base_io");
-    $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
-    $safeeval->share('$@');
-    my $code=<<'ENDDEFS';
-# ---------------------------------------------------- Inside of the safe space
-
-#
-# f: formulas
-# t: intermediate format (variable references expanded)
-# v: output values
-# c: preloaded constants (A-column)
-# rl: row label
-# os: other spreadsheets (for student spreadsheet only)
-
-undef %sheet_values; 
-undef %t;
-undef %f;
-undef %c;
-undef %rowlabel;
-undef @os;
-
-$maxrow = 0;
-$sheettype = '';
-
-# filename/reference of the sheet
-$filename = '';
-
-# user data
-$uname = '';
-$uhome = '';
-$udom  = '';
-
-# course data
-
-$csec = '';
-$chome= '';
-$cnum = '';
-$cdom = '';
-$cid  = '';
-$coursefilename  = '';
-
-# symb
-
-$usymb = '';
-
-# error messages
-$errormsg = '';
-
+##
+## mask - used to reside in the safe space.  
+##
 sub mask {
     my ($lower,$upper)=@_;
 
@@ -188,7 +143,6 @@ sub mask {
           $alpha='['.$la.'-Za-'.$ua.']';
        }
     }   
-
     if (($ld eq '*') || ($ud eq '*')) {
 	$num='\d+';
     } else {
@@ -208,7 +162,9 @@ sub mask {
        } else {
            my @lda=($ld=~m/\d/g);
            my @uda=($ud=~m/\d/g);
-           my $i; $j=0; $notdone=1;
+           my $i; 
+           my $j=0; 
+           my $notdone=1;
            for ($i=0;($i<=$#lda)&&($notdone);$i++) {
                if ($lda[$i]==$uda[$i]) {
 		   $num.=$lda[$i];
@@ -241,6 +197,82 @@ sub mask {
     return '^'.$alpha.$num."\$";
 }
 
+
+
+sub initsheet {
+    my $safeeval = new Safe(shift);
+    my $safehole = new Safe::Hole;
+    $safeeval->permit("entereval");
+    $safeeval->permit(":base_math");
+    $safeeval->permit("sort");
+    $safeeval->deny(":base_io");
+    $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
+    $safehole->wrap(\&Apache::lonspreadsheet::mask,$safeeval,'&mask');
+    $safehole->wrap(\&Apache::lonspreadsheet::templaterow,$safeeval,'&templaterow');
+    $safeeval->share('$@');
+    my $code=<<'ENDDEFS';
+# ---------------------------------------------------- Inside of the safe space
+
+#
+# f: formulas
+# t: intermediate format (variable references expanded)
+# v: output values
+# c: preloaded constants (A-column)
+# rl: row label
+# os: other spreadsheets (for student spreadsheet only)
+
+undef %sheet_values;   # Holds the (computed, final) values for the sheet
+    # This is only written to by &calc, the spreadsheet computation routine.
+    # It is read by many functions
+undef %t; # Holds the values of the spreadsheet temporarily. Set in &sett, 
+    # which does the translation of strings like C5 into the value in C5.
+    # Used in &calc - %t holds the values that are actually eval'd.
+undef %f;    # Holds the formulas for each cell.  This is the users
+    # (spreadsheet authors) data for each cell.
+    # set by &setformulas and returned by &getformulas
+    # &setformulas is called by &readsheet, &tmpread, &updateclasssheet,
+    # &updatestudentassesssheet, &loadstudent, &loadcourse
+    # &getformulas is called by &writesheet, &tmpwrite, &updateclasssheet,
+    # &updatestudentassesssheet, &loadstudent, &loadcourse, &loadassessment, 
+undef %c; # Holds the constants for a sheet.  In the assessment
+    # sheets, this is the A column.  Used in &MINPARM, &MAXPARM, &expandnamed,
+    # &sett, and &setconstants.  There is no &getconstants.
+    # &setconstants is called by &loadstudent, &loadcourse, &load assessment,
+undef %rowlabel;  # Holds the 'prefix' for each row.  Set by &setrowlabels.
+    # &setrowlabels is called by &updateclasssheet, &updatestudentassesssheet,
+undef @os;  # Holds the names of other spreadsheets - this is used to specify
+    # the spreadsheets that are available for the assessment sheet.
+    # Set by &setothersheets.  &setothersheets is called by &handler.  A
+    # related subroutine is &othersheets.
+
+$maxrow = 0;
+$sheettype = '';
+
+# filename/reference of the sheet
+$filename = '';
+
+# user data
+$uname = '';
+$uhome = '';
+$udom  = '';
+
+# course data
+
+$csec = '';
+$chome= '';
+$cnum = '';
+$cdom = '';
+$cid  = '';
+$coursefilename  = '';
+
+# symb
+
+$usymb = '';
+
+# error messages
+$errormsg = '';
+
+
 #-------------------------------------------------------
 
 =item UWCALC(hashname,modules,units,date) 
@@ -852,7 +884,7 @@ sub sett {
     }
     # Deal with the normal cells
     foreach (keys(%f)) {
-	if (($f{$_}) && ($_!~/template\_/)) {
+	if (exists($f{$_}) && ($_!~/template\_/)) {
             my $matches=($_=~/^$pattern(\d+)/);
             if  (($matches) && ($1)) {
 	        unless ($f{$_}=~/^\!/) {
@@ -913,45 +945,37 @@ sub calc {
     return '';
 }
 
-sub templaterow {
-    my @cols=();
-    $cols[0]='<b><font size=+1>Template</font></b>';
-    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 $fm=$f{'template_'.$_};
-        $fm=~s/[\'\"]/\&\#34;/g;
-        push(@cols,"'template_$_','$fm'".'___eq___'.$fm);
-    }
-    return @cols;
-}
-
 #
 # This is actually used for the student spreadsheet, not the assessment sheet
 # Do not be fooled by the name!
 #
 sub outrowassess {
     # $n is the current row number
-    my $n=shift;
+    my $n=shift; 
+    my $csv = shift;
     my @cols=();
     if ($n) {
         my ($usy,$ufn)=split(/__&&&\__/,$f{'A'.$n});
         if ($rowlabel{$usy}) {
-            $cols[0]=$rowlabel{$usy}.'<br>'.
+            $cols[0]=$rowlabel{$usy};
+            if (! $csv) {
+                $cols[0].='<br>'.
                 '<select name="sel_'.$n.'" onChange="changesheet('.$n.')">'.
                     '<option name="default">Default</option>';
+            }
         } else { 
             $cols[0]=''; 
         }
-        foreach (@os) {
-            $cols[0].='<option name="'.$_.'"';
-            if ($ufn eq $_) {
-                $cols[0].=' selected';
+        if (! $csv) {
+            foreach (@os) {
+                $cols[0].='<option name="'.$_.'"';
+                if ($ufn eq $_) {
+                    $cols[0].=' selected';
+                }
+                $cols[0].='>'.$_.'</option>';
             }
-            $cols[0].='>'.$_.'</option>';
+            $cols[0].='</select>';
         }
-        $cols[0].='</select>';
     } else {
         $cols[0]='<b><font size=+1>Export</font></b>';
     }
@@ -994,178 +1018,80 @@ sub exportrowa {
     return @exportarray;
 }
 
+sub templaterow {
+    my @cols=();
+    $cols[0]='<b><font size=+1>Template</font></b>';
+    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 $fm=$f{'template_'.$_};
+        $fm=~s/[\'\"]/\&\#34;/g;
+        push(@cols,"'template_$_','$fm'".'___eq___'.$fm);
+    }
+    return @cols;
+}
+
+
 # ------------------------------------------- End of "Inside of the safe space"
 ENDDEFS
     $safeeval->reval($code);
     return $safeeval;
 }
 
-# ------------------------------------------------ Add or change formula values
 
+# ------------------------------------------------ Add or change formula values
 sub setformulas {
-    my ($safeeval,%f)=@_;
-    %{$safeeval->varglob('f')}=%f;
+    my ($sheet)=shift;
+    %{$sheet->{'safe'}->varglob('f')}=%{$sheet->{'f'}};
 }
 
 # ------------------------------------------------ Add or change formula values
-
 sub setconstants {
-    my ($safeeval,%c)=@_;
-    %{$safeeval->varglob('c')}=%c;
+    my ($sheet)=shift;
+    return %{$sheet->{'safe'}->varglob('c')}=%{$sheet->{'constants'}};
 }
 
 # --------------------------------------------- Set names of other spreadsheets
-
 sub setothersheets {
-    my ($safeeval,@os)=@_;
-    @{$safeeval->varglob('os')}=@os;
+    my $sheet = shift;
+    my @othersheets = @_;
+    $sheet->{'othersheets'} = \@othersheets;
+    @{$sheet->{'safe'}->varglob('os')}=@othersheets;
+    return;
 }
 
 # ------------------------------------------------ Add or change formula values
-
 sub setrowlabels {
-    my ($safeeval,%rowlabel)=@_;
-    %{$safeeval->varglob('rowlabel')}=%rowlabel;
+    my $sheet=shift;
+    %{$sheet->{'safe'}->varglob('rowlabel')}=%{$sheet->{'rowlabel'}};
 }
 
 # ------------------------------------------------------- Calculate spreadsheet
-
 sub calcsheet {
-    my $safeeval=shift;
-    return $safeeval->reval('&calc();');
-}
-
-# ------------------------------------------------------------------ Get values
-
-sub getvalues {
-    my $safeeval=shift;
-    return $safeeval->reval('%sheet_values');
+    my $sheet=shift;
+    my $result =  $sheet->{'safe'}->reval('&calc();');
+    %{$sheet->{'values'}} = %{$sheet->{'safe'}->varglob('sheet_values')};
+    return $result;
 }
 
 # ---------------------------------------------------------------- Get formulas
-
 sub getformulas {
-    my $safeeval=shift;
-    return %{$safeeval->varglob('f')};
+    my $sheet = shift;
+    return %{$sheet->{'safe'}->varglob('f')};
 }
 
 # ----------------------------------------------------- Get value of $f{'A'.$n}
-
 sub getfa {
-    my ($safeeval,$n)=@_;
-    return $safeeval->reval('$f{"A'.$n.'"}');
-}
-
-# -------------------------------------------------------------------- Get type
-
-sub gettype {
-    my $safeeval=shift;
-    return $safeeval->reval('$sheettype');
-}
-
-# ------------------------------------------------------------------ Set maxrow
-
-sub setmaxrow {
-    my ($safeeval,$row)=@_;
-    $safeeval->reval('$maxrow='.$row.';');
-}
-
-# ------------------------------------------------------------------ Get maxrow
-
-sub getmaxrow {
-    my $safeeval=shift;
-    return $safeeval->reval('$maxrow');
-}
-
-# ---------------------------------------------------------------- Set filename
-
-sub setfilename {
-    my ($safeeval,$fn)=@_;
-    $safeeval->reval('$filename="'.$fn.'";');
-}
-
-# ---------------------------------------------------------------- Get filename
-
-sub getfilename {
-    my $safeeval=shift;
-    return $safeeval->reval('$filename');
-}
-
-# --------------------------------------------------------------- Get course ID
-
-sub getcid {
-    my $safeeval=shift;
-    return $safeeval->reval('$cid');
-}
-
-# --------------------------------------------------------- Get course filename
-
-sub getcoursefilename {
-    my $safeeval=shift;
-    return $safeeval->reval('$coursefilename');
-}
-
-# ----------------------------------------------------------- Get course number
-
-sub getcnum {
-    my $safeeval=shift;
-    return $safeeval->reval('$cnum');
-}
-
-# ------------------------------------------------------------- Get course home
-
-sub getchome {
-    my $safeeval=shift;
-    return $safeeval->reval('$chome');
-}
-
-# ----------------------------------------------------------- Get course domain
-
-sub getcdom {
-    my $safeeval=shift;
-    return $safeeval->reval('$cdom');
-}
-
-# ---------------------------------------------------------- Get course section
-
-sub getcsec {
-    my $safeeval=shift;
-    return $safeeval->reval('$csec');
-}
-
-# --------------------------------------------------------------- Get user name
-
-sub getuname {
-    my $safeeval=shift;
-    return $safeeval->reval('$uname');
-}
-
-# ------------------------------------------------------------- Get user domain
-
-sub getudom {
-    my $safeeval=shift;
-    return $safeeval->reval('$udom');
-}
-
-# --------------------------------------------------------------- Get user home
-
-sub getuhome {
-    my $safeeval=shift;
-    return $safeeval->reval('$uhome');
-}
-
-# -------------------------------------------------------------------- Get symb
-
-sub getusymb {
-    my $safeeval=shift;
-    return $safeeval->reval('$usymb');
+    my $sheet = shift;
+    my ($n)=@_;
+    return $sheet->{'safe'}->reval('$f{"A'.$n.'"}');
 }
 
 # ------------------------------------------------------------- Export of A-row
-
 sub exportdata {
-    my $safeeval=shift;
-    return $safeeval->reval('&exportrowa()');
+    my $sheet=shift;
+    return $sheet->{'safe'}->reval('&exportrowa()');
 }
 
 
@@ -1178,7 +1104,7 @@ sub exportdata {
 # --------------------------------------------- Produce output row n from sheet
 
 sub rown {
-    my ($safeeval,$n)=@_;
+    my ($sheet,$n)=@_;
     my $defaultbg;
     my $rowdata='';
     my $dataflag=0;
@@ -1195,7 +1121,7 @@ sub rown {
     my $showf=0;
     my $proc;
     my $maxred=1;
-    my $sheettype=&gettype($safeeval);
+    my $sheettype=$sheet->{'sheettype'};
     if ($sheettype eq 'studentcalc') {
         $proc='&outrowassess';
         $maxred=26;
@@ -1207,13 +1133,13 @@ sub rown {
     } else {
         $maxred=26;
     }
-    if (&getfa($safeeval,$n)=~/^[\~\-]/) { $maxred=1; }
+    if (&getfa($sheet,$n)=~/^[\~\-]/) { $maxred=1; }
     if ($n eq '-') { 
         $proc='&templaterow'; 
         $n=-1; 
         $dataflag=1; 
     }
-    foreach ($safeeval->reval($proc.'('.$n.')')) {
+    foreach ($sheet->{'safe'}->reval($proc.'('.$n.','.$ENV{'form.showcsv'}.')')) {
         my $bgcolor=$defaultbg.((($showf-1)/5==int(($showf-1)/5))?'99':'DD');
         my ($fm,$vl)=split(/\_\_\_eq\_\_\_/,$_);
         if ((($vl ne '') || ($vl eq '0')) &&
@@ -1226,8 +1152,14 @@ sub rown {
                 if ($vl eq '') {
                     $vl='<font size=+2 color='.$bgcolor.'>&#35;</font>';
                 }
-                $rowdata.='<td bgcolor='.$bgcolor.'>'.
-                    '<a href="javascript:celledit('.$fm.');">'.$vl.'</a></td>';
+                $rowdata.='<td bgcolor='.$bgcolor.'>';
+                if ($ENV{'request.role'} =~ /^st\./) {
+                    $rowdata.=$vl;
+                } else {
+                    $rowdata.='<a href="javascript:celledit('.$fm.');">'.
+                        $vl.'</a>';
+                }
+                $rowdata.='</td>';
             } else {
                 $rowdata.='<td bgcolor='.$bgcolor.'>&nbsp;'.$vl.'&nbsp;</td>';
             }
@@ -1246,17 +1178,17 @@ sub rown {
 # ------------------------------------------------------------- Print out sheet
 
 sub outsheet {
-    my ($r,$safeeval,$sheetdata)=@_;
+    my ($r,$sheet)=@_;
     my $maxred = 26;    # The maximum number of cells to show as 
                         # red (uneditable) 
                         # To make student sheets uneditable could we 
                         # set $maxred = 52?
                         #
     my $realm='Course'; # 'assessment', 'user', or 'course' sheet
-    if ($sheetdata->{'sheettype'} eq 'assesscalc') {
+    if ($sheet->{'sheettype'} eq 'assesscalc') {
         $maxred=1;
         $realm='Assessment';
-    } elsif ($sheetdata->{'sheettype'} eq 'studentcalc') {
+    } elsif ($sheet->{'sheettype'} eq 'studentcalc') {
         $maxred=26;
         $realm='User';
     }
@@ -1285,34 +1217,34 @@ sub outsheet {
             }
             $tabledata.="<b><font size=+1>$_</font></b></td>";
         }
-        $tabledata.='</tr>'.&rown($safeeval,'-').&rown($safeeval,0);
+        $tabledata.='</tr>'.&rown($sheet,'-').
+            &rown($sheet,0);
     }
     $r->print($tabledata);
     #
     # Prepare to output rows
     my $row;
-    my $maxrow=&getmaxrow($safeeval);
     #
     my @sortby=();
     my @sortidx=();
-    for ($row=1;$row<=$maxrow;$row++) {
-        push (@sortby, $safeeval->reval('$f{"A'.$row.'"}'));
+    for ($row=1;$row<=$sheet->{'maxrow'};$row++) {
+        push (@sortby, $sheet->{'safe'}->reval('$f{"A'.$row.'"}'));
         push (@sortidx, $row-1);
     }
-    @sortidx=sort { $sortby[$a] cmp $sortby[$b]; } @sortidx;
+    @sortidx=sort { lc($sortby[$a]) cmp lc($sortby[$b]); } @sortidx;
     #
     # Determine the type of child spreadsheets
     my $what='Student';
-    if ($sheetdata->{'sheettype'} eq 'assesscalc') {
+    if ($sheet->{'sheettype'} eq 'assesscalc') {
         $what='Item';
-    } elsif ($sheetdata->{'sheettype'} eq 'studentcalc') {
+    } elsif ($sheet->{'sheettype'} eq 'studentcalc') {
         $what='Assessment';
     }
     #
     # Loop through the rows and output them one at a time
     my $n=0;
-    for ($row=0;$row<$maxrow;$row++) {
-        my $thisrow=&rown($safeeval,$sortidx[$row]+1);
+    for ($row=0;$row<$sheet->{'maxrow'};$row++) {
+        my $thisrow=&rown($sheet,$sortidx[$row]+1);
         if ($thisrow) {
             if (($n/25==int($n/25)) && (!$ENV{'form.showcsv'})) {
                 $r->print("</table>\n<br>\n");
@@ -1335,11 +1267,12 @@ sub outsheet {
 # ----------------------------------------------- Read list of available sheets
 # 
 sub othersheets {
-    my ($safeeval,$stype)=@_;
+    my ($sheet,$stype)=@_;
+    $stype = $sheet->{'sheettype'} if (! defined($stype));
     #
-    my $cnum  = &getcnum($safeeval);
-    my $cdom  = &getcdom($safeeval);
-    my $chome = &getchome($safeeval);
+    my $cnum  = $sheet->{'cnum'};
+    my $cdom  = $sheet->{'cdom'};
+    my $chome = $sheet->{'chome'};
     #
     my @alternatives=();
     my %results=&Apache::lonnet::dump($stype.'_spreadsheets',$cdom,$cnum);
@@ -1383,12 +1316,12 @@ sub parse_sheet {
 # -------------------------------------- Read spreadsheet formulas for a course
 #
 sub readsheet {
-    my ($safeeval,$sheetdata,$fn)=@_;
+    my ($sheet,$fn)=@_;
     #
-    my $stype = $sheetdata->{'sheettype'};
-    my $cnum  = $sheetdata->{'cnum'};
-    my $cdom  = $sheetdata->{'cdom'};
-    my $chome = $sheetdata->{'chome'};
+    my $stype = $sheet->{'sheettype'};
+    my $cnum  = $sheet->{'cnum'};
+    my $cdom  = $sheet->{'cdom'};
+    my $chome = $sheet->{'chome'};
     #
     if (! defined($fn)) {
         # There is no filename. Look for defaults in course and global, cache
@@ -1409,11 +1342,13 @@ sub readsheet {
         }
     }
     # $fn now has a value
-    &setfilename($safeeval,$fn);
+    $sheet->{'filename'} = $fn;
     # see if sheet is cached
     my $fstring='';
     if ($fstring=$spreadsheets{$cnum.'_'.$cdom.'_'.$stype.'_'.$fn}) {
-        &setformulas($safeeval,split(/\_\_\_\;\_\_\_/,$fstring));
+        my %tmp = split(/___;___/,$fstring);
+        $sheet->{'f'} = \%tmp;
+        &setformulas($sheet);
     } else {
         # Not cached, need to read
         my %f=();
@@ -1448,47 +1383,58 @@ sub readsheet {
         }
         # Cache and set
         $spreadsheets{$cnum.'_'.$cdom.'_'.$stype.'_'.$fn}=join('___;___',%f);  
-        &setformulas($safeeval,%f);
+        $sheet->{'f'}=\%f;
+        &setformulas($sheet);
     }
 }
 
 # -------------------------------------------------------- Make new spreadsheet
 sub makenewsheet {
     my ($uname,$udom,$stype,$usymb)=@_;
-    my %sheetdata=();
-    $sheetdata{'uname'} = $uname;
-    $sheetdata{'udom'}  = $udom;
-    $sheetdata{'sheettype'} = $stype;
-    $sheetdata{'usymb'} = $usymb;
-    $sheetdata{'cid'}   = $ENV{'request.course.id'};
-    $sheetdata{'csec'}  = &Apache::lonnet::usection
-                               ($udom,$uname,$ENV{'request.course.id'});
-    $sheetdata{'coursefilename'}   = $ENV{'request.course.fn'};
-    $sheetdata{'cnum'}  = $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
-    $sheetdata{'cdom'}  = $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
-    $sheetdata{'chome'} = $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
-    $sheetdata{'uhome'} = &Apache::lonnet::homeserver($uname,$udom);
-    
-    my $safeeval=initsheet($stype);
+    my $sheet={};
+    $sheet->{'uname'} = $uname;
+    $sheet->{'udom'}  = $udom;
+    $sheet->{'sheettype'} = $stype;
+    $sheet->{'usymb'} = $usymb;
+    $sheet->{'cid'}   = $ENV{'request.course.id'};
+    $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'};
+    $sheet->{'uhome'} = &Apache::lonnet::homeserver($uname,$udom);
+    #
+    #
+    $sheet->{'f'} = {};
+    $sheet->{'constants'} = {};
+    $sheet->{'othersheets'} = [];
+    $sheet->{'rowlabel'} = {};
+    #
+    #
+    $sheet->{'safe'}=&initsheet($sheet->{'sheettype'});
+    #
+    # Place all the %$sheet items into the safe space except the safe space
+    # itself
     my $initstring = '';
-    foreach (keys(%sheetdata)) {
-        $initstring.= qq{\$$_="$sheetdata{$_}";};
+    foreach (qw/uname udom sheettype usymb cid csec coursefilename
+             cnum cdom chome uhome/) {
+        $initstring.= qq{\$$_="$sheet->{$_}";};
     }
-    $safeeval->reval($initstring);
-    return $safeeval,\%sheetdata;
+    $sheet->{'safe'}->reval($initstring);
+    return $sheet;
 }
 
 # ------------------------------------------------------------ Save spreadsheet
 sub writesheet {
-    my ($safeeval,$makedef)=@_;
-    my $cid=&getcid($safeeval);
+    my ($sheet,$makedef)=@_;
+    my $cid=$sheet->{'cid'};
     if (&Apache::lonnet::allowed('opa',$cid)) {
-        my %f=&getformulas($safeeval);
-        my $stype=&gettype($safeeval);
-        my $cnum=&getcnum($safeeval);
-        my $cdom=&getcdom($safeeval);
-        my $chome=&getchome($safeeval);
-        my $fn=&getfilename($safeeval);
+        my %f=&getformulas($sheet);
+        my $stype= $sheet->{'sheettype'};
+        my $cnum = $sheet->{'cnum'};
+        my $cdom = $sheet->{'cdom'};
+        my $chome= $sheet->{'chome'};
+        my $fn   = $sheet->{'filename'};
         # Cache new sheet
         $spreadsheets{$cnum.'_'.$cdom.'_'.$stype.'_'.$fn}=join('___;___',%f);
         # Write sheet
@@ -1531,24 +1477,24 @@ sub writesheet {
 # "Modified workcopy" - interactive only
 #
 sub tmpwrite {
-    my $safeeval=shift;
+    my ($sheet) = @_;
     my $fn=$ENV{'user.name'}.'_'.
-        $ENV{'user.domain'}.'_spreadsheet_'.&getusymb($safeeval).'_'.
-           &getfilename($safeeval);
+        $ENV{'user.domain'}.'_spreadsheet_'.$sheet->{'usymb'}.'_'.
+           $sheet->{'filename'};
     $fn=~s/\W/\_/g;
     $fn=$tmpdir.$fn.'.tmp';
     my $fh;
     if ($fh=Apache::File->new('>'.$fn)) {
-	print $fh join("\n",&getformulas($safeeval));
+	print $fh join("\n",&getformulas($sheet));
     }
 }
 
 # ---------------------------------------------------------- Read the temp copy
 sub tmpread {
-    my ($safeeval,$nfield,$nform)=@_;
+    my ($sheet,$nfield,$nform)=@_;
     my $fn=$ENV{'user.name'}.'_'.
-           $ENV{'user.domain'}.'_spreadsheet_'.&getusymb($safeeval).'_'.
-           &getfilename($safeeval);
+           $ENV{'user.domain'}.'_spreadsheet_'.$sheet->{'usymb'}.'_'.
+           $sheet->{'filename'};
     $fn=~s/\W/\_/g;
     $fn=$tmpdir.$fn.'.tmp';
     my $fh;
@@ -1584,7 +1530,8 @@ sub tmpread {
     } else {
        if ($nfield) { $fo{$nfield}=$nform; }
     }
-    &setformulas($safeeval,%fo);
+    $sheet->{'f'}=\%fo;
+    &setformulas($sheet);
 }
 
 ##################################################
@@ -1596,7 +1543,7 @@ sub tmpread {
 
 Determine the value of a parameter.
 
-Inputs: $what, the parameter needed, $safeeval, the safe space
+Inputs: $what, the parameter needed, $sheet, the safe space
 
 Returns: The value of a parameter, or '' if none.
 
@@ -1612,14 +1559,14 @@ this user and course.
 ##################################################
 ##################################################
 sub parmval {
-    my ($what,$safeeval,$sheetdata)=@_;
-    my $symb  = $sheetdata->{'usymb'};
+    my ($what,$sheet)=@_;
+    my $symb  = $sheet->{'usymb'};
     unless ($symb) { return ''; }
     #
-    my $cid   = $sheetdata->{'cid'};
-    my $csec  = $sheetdata->{'csec'};
-    my $uname = $sheetdata->{'uname'};
-    my $udom  = $sheetdata->{'udom'};
+    my $cid   = $sheet->{'cid'};
+    my $csec  = $sheet->{'csec'};
+    my $uname = $sheet->{'uname'};
+    my $udom  = $sheet->{'udom'};
     my $result='';
     #
     my ($mapname,$id,$fn)=split(/\_\_\_/,$symb);
@@ -1640,112 +1587,81 @@ sub parmval {
     my $courselevelr = $usercourseprefix.'.'.$symbparm;
     my $courselevelm = $usercourseprefix.'.'.$mapparm;
     # fourth, check user
-    if ($uname) { 
-        return $useropt{$courselevelr} if ($useropt{$courselevelr});
-        return $useropt{$courselevelm} if ($useropt{$courselevelm});
-        return $useropt{$courselevel}  if ($useropt{$courselevel});
+    if (defined($uname)) {
+        return $useropt{$courselevelr} if (defined($useropt{$courselevelr}));
+        return $useropt{$courselevelm} if (defined($useropt{$courselevelm}));
+        return $useropt{$courselevel}  if (defined($useropt{$courselevel}));
     }
     # third, check course
-    if ($csec) {
-        return $courseopt{$seclevelr} if ($courseopt{$seclevelr});
-        return $courseopt{$seclevelm} if ($courseopt{$seclevelm});
-        return $courseopt{$seclevel}  if ($courseopt{$seclevel});
+    if (defined($csec)) {
+        return $courseopt{$seclevelr} if (defined($courseopt{$seclevelr}));
+        return $courseopt{$seclevelm} if (defined($courseopt{$seclevelm}));
+        return $courseopt{$seclevel}  if (defined($courseopt{$seclevel}));
     }
     #
-    return $courseopt{$courselevelr} if ($courseopt{$courselevelr});
-    return $courseopt{$courselevelm} if ($courseopt{$courselevelm});
-    return $courseopt{$courselevel}  if ($courseopt{$courselevel});
+    return $courseopt{$courselevelr} if (defined($courseopt{$courselevelr}));
+    return $courseopt{$courselevelm} if (defined($courseopt{$courselevelm}));
+    return $courseopt{$courselevel}  if (defined($courseopt{$courselevel}));
     # second, check map parms
     my $thisparm = $parmhash{$symbparm};
-    return $thisparm if ($thisparm);
+    return $thisparm if (defined($thisparm));
     # first, check default
     return &Apache::lonnet::metadata($fn,$rwhat.'.default');
 }
 
 # ---------------------------------------------- Update rows for course listing
 sub updateclasssheet {
-    my ($safeeval,$sheetdata) = @_;
-    my $cnum  =$sheetdata->{'cnum'};
-    my $cdom  =$sheetdata->{'cdom'};
-    my $cid   =$sheetdata->{'cid'};
-    my $chome =$sheetdata->{'chome'};
+    my ($sheet) = @_;
+    my $cnum  =$sheet->{'cnum'};
+    my $cdom  =$sheet->{'cdom'};
+    my $cid   =$sheet->{'cid'};
+    my $chome =$sheet->{'chome'};
+    #
+    %Section = ();
+
     #
     # Read class list and row labels
-    my %classlist;
-    my @tmp = &Apache::lonnet::dump('classlist',$cdom,$cnum);
-    if ($tmp[0] !~ /^error/) {
-        %classlist = @tmp;
-    } else {
-        return 'Could not access course data';
-    }
-    undef @tmp;
+    my $classlist = &Apache::loncoursedata::get_classlist();
+    if (! defined($classlist)) {
+        return 'Could not access course classlist';
+    } 
     #
     my %currentlist=();
-    my $now=time;
-    foreach my $student (keys(%classlist)) {
-        my ($end,$start)=split(/\:/,$classlist{$student});
-        my $active=1;
-        $active = 0 if (($end) && ($now>$end));
-        $active = 1 if ($ENV{'form.Status'} eq 'Any');
-        $active = !$active if ($ENV{'form.Status'} eq 'Expired');
-        if ($active) {
+    foreach my $student (keys(%$classlist)) {
+        my ($studentDomain,$studentName,$end,$start,$id,$studentSection,
+            $fullname,$status)   =   @{$classlist->{$student}};
+        if ($ENV{'form.Status'} eq $status || $ENV{'form.Status'} eq 'Any') {
             my $rowlabel='';
-            my ($studentName,$studentDomain)=split(/\:/,$student);
-            my $studentSection=&Apache::lonnet::usection($studentDomain,
-                                                         $studentName,$cid);
-#            if ($studentSection==-1) {
-#                unless ($ENV{'form.showcsv'}) {
-#                    $rowlabel='<font color=red>Data not available: '.
-#                        $studentName.'</font>';
-#                } else {
-#                    $rowlabel='ERROR","'.$studentName.
-#                        '","Data not available","","","';
-#                }
-#            } else {
-                my %reply=&Apache::lonnet::idrget($studentDomain,$studentName);
-                my %studentInformation=&Apache::lonnet::get
-                    ('environment',
-                     ['lastname','generation','firstname','middlename','id'],
-                     $studentDomain,$studentName);
-                if (! $ENV{'form.showcsv'}) {
-                    $rowlabel='<a href="/adm/studentcalc?uname='.$studentName.
-                        '&udom='.$studentDomain.'">'.
-                            $studentSection.'&nbsp;';
-                    foreach ('id','firstname','middlename',
-                             'lastname','generation'){
-                        $rowlabel.=$studentInformation{$_}."&nbsp;";
-                    }
-                    $rowlabel.='</a>';
-                } else {
-                    $rowlabel= '"'.join('","',
-                                        ($studentSection,
-                                         $studentInformation{'id'},
-                                         $studentInformation{'firstname'},
-                                         $studentInformation{'middlename'},
-                                         $studentInformation{'lastname'},
-                                         $studentInformation{'generation'})
-                                        ).'"';
-                }
- #           }
+            if ($ENV{'form.showcsv'}) {
+                $rowlabel= '"'.join('","',($studentName,$studentDomain,
+                                           $fullname,$studentSection,$id).'"');
+            } else {
+                $rowlabel='<a href="/adm/studentcalc?uname='.$studentName.
+                    '&udom='.$studentDomain.'">';
+                $rowlabel.=$studentSection.'&nbsp;'.$id."&nbsp;".$fullname;
+                $rowlabel.='</a>';
+            }
             $currentlist{$student}=$rowlabel;
-        } # end of if ($active)
-    } # end of foreach my $student (keys(%classlist))
+        }
+    }
     #
     # Find discrepancies between the course row table and this
     #
-    my %f=&getformulas($safeeval);
+    my %f=&getformulas($sheet);
     my $changed=0;
     #
-    my $maxrow=0;
+    $sheet->{'maxrow'}=0;
     my %existing=();
     #
     # Now obsolete rows
     foreach (keys(%f)) {
         if ($_=~/^A(\d+)/) {
-            $maxrow=($1>$maxrow)?$1:$maxrow;
+            if ($1 > $sheet->{'maxrow'}) {
+                $sheet->{'maxrow'}= $1;
+            }
             $existing{$f{$_}}=1;
             unless ((defined($currentlist{$f{$_}})) || (!$1) ||
-                    ($f{$_}=~/^(\~\~\~|\-\-\-)/)) {
+                    ($f{$_}=~/^(~~~|---)/)) {
                 $f{$_}='!!! Obsolete';
                 $changed=1;
             }
@@ -1756,27 +1672,30 @@ sub updateclasssheet {
     foreach (sort keys(%currentlist)) {
         unless ($existing{$_}) {
             $changed=1;
-            $maxrow++;
-            $f{'A'.$maxrow}=$_;
+            $sheet->{'maxrow'}++;
+            $f{'A'.$sheet->{'maxrow'}}=$_;
         }
     }
-    if ($changed) { &setformulas($safeeval,%f); }
+    if ($changed) { 
+        $sheet->{'f'} = \%f;
+        &setformulas($sheet,%f); 
+    }
     #
-    &setmaxrow($safeeval,$maxrow);
-    &setrowlabels($safeeval,%currentlist);
+    $sheet->{'rowlabel'} = \%currentlist;
+    &setrowlabels($sheet);
 }
 
 # ----------------------------------- Update rows for student and assess sheets
 sub updatestudentassesssheet {
-    my ($safeeval,$sheetdata) = @_;
+    my ($sheet) = @_;
     my %bighash;
-    my $stype=$sheetdata->{'sheettype'};
-    my $uname=$sheetdata->{'uname'};
-    my $udom =$sheetdata->{'udom'};
-    my %current=();
+    my $stype=$sheet->{'sheettype'};
+    my $uname=$sheet->{'uname'};
+    my $udom =$sheet->{'udom'};
+    $sheet->{'rowlabel'} = {};
     if  ($updatedata
          {$ENV{'request.course.fn'}.'_'.$stype.'_'.$uname.'_'.$udom}) {
-        %current=split(/\_\_\_\;\_\_\_/,
+        %{$sheet->{'rowlabel'}}=split(/___;___/,
                        $updatedata{$ENV{'request.course.fn'}.
                                        '_'.$stype.'_'.$uname.'_'.$udom});
     } else {
@@ -1799,16 +1718,26 @@ sub updatestudentassesssheet {
         if (($uname ne $ENV{'user.name'}) || ($udom ne $ENV{'user.domain'})){
             $adduserstr='&uname='.$uname.'&udom='.$udom;
         }
-        my %allassess =
-            ('_feedback' =>'<a href="/adm/assesscalc?usymb=_feedback'.
-             $adduserstr.'">Feedback</a>',
-             '_evaluation' =>'<a href="/adm/assesscalc?usymb=_evaluation'.
-             $adduserstr.'">Evaluation</a>',
-             '_tutoring' =>'<a href="/adm/assesscalc?usymb=_tutoring'.
-             $adduserstr.'">Tutoring</a>',
-             '_discussion' =>'<a href="/adm/assesscalc?usymb=_discussion'.
-             $adduserstr.'">Discussion</a>'
-             );
+        my %allassess;
+        if (! $ENV{'form.showcsv'}) {
+            %allassess =
+                ('_feedback' =>'<a href="/adm/assesscalc?usymb=_feedback'.
+                 $adduserstr.'">Feedback</a>',
+                 '_evaluation' =>'<a href="/adm/assesscalc?usymb=_evaluation'.
+                 $adduserstr.'">Evaluation</a>',
+                 '_tutoring' =>'<a href="/adm/assesscalc?usymb=_tutoring'.
+                 $adduserstr.'">Tutoring</a>',
+                 '_discussion' =>'<a href="/adm/assesscalc?usymb=_discussion'.
+                 $adduserstr.'">Discussion</a>'
+                 );
+        } else {
+            %allassess =
+                ('_feedback'   => "Feedback",
+                 '_evaluation' => "Evaluation",
+                 '_tutoring'   => "Tutoring",
+                 '_discussion' => "Discussion",
+                 );
+        }
         while (($_,undef) = each(%bighash)) {
             next if ($_!~/^src\_(\d+)\.(\d+)$/);
             my $mapid=$1;
@@ -1819,9 +1748,13 @@ sub updatestudentassesssheet {
                 my $symb=
                     &Apache::lonnet::declutter($bighash{'map_id_'.$mapid}).
                         '___'.$resid.'___'.&Apache::lonnet::declutter($srcf);
-                $allassess{$symb}=
-                    '<a href="/adm/assesscalc?usymb='.$symb.$adduserstr.'">'.
-                        $bighash{'title_'.$id}.'</a>';
+                if (! $ENV{'form.showcsv'}) {
+                    $allassess{$symb}=
+                        '<a href="/adm/assesscalc?usymb='.$symb.$adduserstr.'">'.
+                            $bighash{'title_'.$id}.'</a>';
+                } else {
+                    $allassess{$symb}=$bighash{'title_'.$id};
+                }
                 next if ($stype ne 'assesscalc');
                 foreach my $key (split(/\,/,
                                        &Apache::lonnet::metadata($srcf,'keys')
@@ -1844,63 +1777,67 @@ sub updatestudentassesssheet {
         # %allassess has a list of all resource displays by symb
         #
         if ($stype eq 'assesscalc') {
-            %current=%allkeys;
+            $sheet->{'rowlabel'} = \%allkeys;
         } elsif ($stype eq 'studentcalc') {
-            %current=%allassess;
+            $sheet->{'rowlabel'} = \%allassess;
         }
         $updatedata{$ENV{'request.course.fn'}.'_'.$stype.'_'.$uname.'_'.$udom}=
-            join('___;___',%current);
+            join('___;___',%{$sheet->{'rowlabel'}});
         # Get current from cache
     }
     # Find discrepancies between the course row table and this
     #
-    my %f=&getformulas($safeeval);
+    my %f=&getformulas($sheet);
     my $changed=0;
     
-    my $maxrow=0;
+    $sheet->{'maxrow'} = 0;
     my %existing=();
     # Now obsolete rows
     foreach (keys(%f)) {
         next if ($_!~/^A(\d+)/);
-        $maxrow=($1>$maxrow)?$1:$maxrow;
-        my ($usy,$ufn)=split(/\_\_\&\&\&\_\_/,$f{$_});
+        if ($1 > $sheet->{'maxrow'}) {
+            $sheet->{'maxrow'} = $1;
+        }
+        my ($usy,$ufn)=split(/__&&&\__/,$f{$_});
         $existing{$usy}=1;
-        unless ((defined($current{$usy})) || (!$1) ||
-                ($f{$_}=~/^(\~\~\~|\-\-\-)/)){
+        unless ((exists($sheet->{'rowlabel'}->{$usy}) && 
+                 (defined($sheet->{'rowlabel'}->{$usy})) || (!$1) ||
+                ($f{$_}=~/^(~~~|---)/))){
             $f{$_}='!!! Obsolete';
             $changed=1;
         } elsif ($ufn) {
-            $current{$usy}
-            =~s/assesscalc\?usymb\=/assesscalc\?ufn\=$ufn\&usymb\=/;
+            $sheet->{'rowlabel'}->{$usy}
+                =~s/assesscalc\?usymb\=/assesscalc\?ufn\=$ufn\&usymb\=/;
         }
     }
     # New and unknown keys
-    foreach (keys(%current)) {
+    foreach (keys(%{$sheet->{'rowlabel'}})) {
         unless ($existing{$_}) {
             $changed=1;
-            $maxrow++;
-            $f{'A'.$maxrow}=$_;
+            $sheet->{'maxrow'}++;
+            $f{'A'.$sheet->{'maxrow'}}=$_;
         }
     }
-    if ($changed) { &setformulas($safeeval,%f); }
-    &setmaxrow($safeeval,$maxrow);
-    &setrowlabels($safeeval,%current);
+    if ($changed) { 
+        $sheet->{'f'} = \%f;
+        &setformulas($sheet); 
+    }
+    &setrowlabels($sheet);
     #
-    undef %current;
     undef %existing;
 }
 
 # ------------------------------------------------ Load data for one assessment
 
 sub loadstudent {
-    my ($safeeval,$sheetdata)=@_;
+    my ($sheet)=@_;
     my %c=();
-    my %f=&getformulas($safeeval);
-    $cachedassess=$sheetdata->{'uname'}.':'.$sheetdata->{'udom'};
+    my %f=&getformulas($sheet);
+    $cachedassess=$sheet->{'uname'}.':'.$sheet->{'udom'};
     # Get ALL the student preformance data
-    my @tmp = &Apache::lonnet::dump($sheetdata->{'cid'},
-                                    $sheetdata->{'udom'},
-                                    $sheetdata->{'uname'},
+    my @tmp = &Apache::lonnet::dump($sheet->{'cid'},
+                                    $sheet->{'udom'},
+                                    $sheet->{'uname'},
                                     undef);
     if ($tmp[0] !~ /^error:/) {
         %cachedstores = @tmp;
@@ -1913,8 +1850,8 @@ sub loadstudent {
         my $row=$1;
         next if (($f{$_}=~/^[\!\~\-]/) || ($row==0));
         my ($usy,$ufn)=split(/__&&&\__/,$f{$_});
-        @assessdata=&exportsheet($sheetdata->{'uname'},
-                                 $sheetdata->{'udom'},
+        @assessdata=&exportsheet($sheet->{'uname'},
+                                 $sheet->{'udom'},
                                  'assesscalc',$usy,$ufn);
         my $index=0;
         foreach ('A','B','C','D','E','F','G','H','I','J','K','L','M',
@@ -1935,16 +1872,18 @@ sub loadstudent {
     }
     $cachedassess='';
     undef %cachedstores;
-    &setformulas($safeeval,%f);
-    &setconstants($safeeval,%c);
+    $sheet->{'f'} = \%f;
+    $sheet->{'constants'} = \%c;
+    &setformulas($sheet);
+    &setconstants($sheet);
 }
 
 # --------------------------------------------------- Load data for one student
 #
 sub loadcourse {
-    my ($safeeval,$sheetdata,$r)=@_;
+    my ($sheet,$r)=@_;
     my %c=();
-    my %f=&getformulas($safeeval);
+    my %f=&getformulas($sheet);
     my $total=0;
     foreach (keys(%f)) {
 	if ($_=~/^A(\d+)/) {
@@ -1995,8 +1934,10 @@ ENDPOP
             }
         }
     }
-    &setformulas($safeeval,%f);
-    &setconstants($safeeval,%c);
+    $sheet->{'f'}=\%f;
+    $sheet->{'constants'}=\%c;
+    &setformulas($sheet);
+    &setconstants($sheet);
     $r->print('<script>popwin.close()</script>');
     $r->rflush(); 
 }
@@ -2004,16 +1945,16 @@ ENDPOP
 # ------------------------------------------------ Load data for one assessment
 #
 sub loadassessment {
-    my ($safeeval,$sheetdata)=@_;
+    my ($sheet)=@_;
 
-    my $uhome = $sheetdata->{'uhome'};
-    my $uname = $sheetdata->{'uname'};
-    my $udom  = $sheetdata->{'udom'};
-    my $symb  = $sheetdata->{'usymb'};
-    my $cid   = $sheetdata->{'cid'};
-    my $cnum  = $sheetdata->{'cnum'};
-    my $cdom  = $sheetdata->{'cdom'};
-    my $chome = $sheetdata->{'chome'};
+    my $uhome = $sheet->{'uhome'};
+    my $uname = $sheet->{'uname'};
+    my $udom  = $sheet->{'udom'};
+    my $symb  = $sheet->{'usymb'};
+    my $cid   = $sheet->{'cid'};
+    my $cnum  = $sheet->{'cnum'};
+    my $cdom  = $sheet->{'cdom'};
+    my $chome = $sheet->{'chome'};
 
     my $namespace;
     unless ($namespace=$cid) { return ''; }
@@ -2048,10 +1989,9 @@ sub loadassessment {
     # This is dumb.  It is also necessary :(
     my @oldkeys=keys %returnhash;
     #
-    foreach (@oldkeys) {
-        my $name=$_;
-        my $value=$returnhash{$_};
-        delete $returnhash{$_};
+    foreach my $name (@oldkeys) {
+        my $value=$returnhash{$name};
+        delete $returnhash{$name};
         $name=~s/\_/\./g;
         $returnhash{$name}=$value;
     }
@@ -2060,35 +2000,28 @@ sub loadassessment {
     undef %useropt;
 
     my $userprefix=$uname.'_'.$udom.'_';
-    
+
     unless ($uhome eq 'no_host') { 
         # Get coursedata
         unless ((time-$courserdatas{$cid.'.last_cache'})<240) {
-            my $reply=&Apache::lonnet::reply('dump:'.$cdom.':'.$cnum.
-                                             ':resourcedata',$chome);
-            if ($reply!~/^error\:/) {
-                $courserdatas{$cid}=$reply;
-                $courserdatas{$cid.'.last_cache'}=time;
-            }
+            my %Tmp = &Apache::lonnet::dump('resourcedata',$cdom,$cnum);
+            $courserdatas{$cid}=\%Tmp;
+            $courserdatas{$cid.'.last_cache'}=time;
         }
-        foreach (split(/\&/,$courserdatas{$cid})) {
-            my ($name,$value)=split(/\=/,$_);
-            $courseopt{$userprefix.&Apache::lonnet::unescape($name)}=
-                &Apache::lonnet::unescape($value);  
+        while (my ($name,$value) = each(%{$courserdatas{$cid}})) {
+            $courseopt{$userprefix.$name}=$value;
         }
         # Get userdata (if present)
-        unless ((time-$userrdatas{$uname.'___'.$udom.'.last_cache'})<240) {
-            my $reply=
-                &Apache::lonnet::reply('dump:'.$udom.':'.$uname.':resourcedata',$uhome);
-            if ($reply!~/^error\:/) {
-                $userrdatas{$uname.'___'.$udom}=$reply;
-                $userrdatas{$uname.'___'.$udom.'.last_cache'}=time;
-            }
+        unless ((time-$userrdatas{$uname.'@'.$udom.'.last_cache'})<240) {
+            my %Tmp = &Apache::lonnet::dump('resourcedata',$udom,$uname);
+            $userrdatas{$cid} = \%Tmp;
+            # Most of the time the user does not have a 'resourcedata.db' 
+            # file.  We need to cache that we got nothing instead of bothering
+            # with requesting it every time.
+            $userrdatas{$uname.'@'.$udom.'.last_cache'}=time;
         }
-        foreach (split(/\&/,$userrdatas{$uname.'___'.$udom})) {
-            my ($name,$value)=split(/\=/,$_);
-            $useropt{$userprefix.&Apache::lonnet::unescape($name)}=
-                &Apache::lonnet::unescape($value);
+        while (my ($name,$value) = each(%{$userrdatas{$cid}})) {
+            $useropt{$userprefix.$name}=$value;
         }
     }
     # now courseopt, useropt initialized for this user and course
@@ -2106,14 +2039,14 @@ sub loadassessment {
     #
     my %c=();
     if (tie(%parmhash,'GDBM_File',
-            &getcoursefilename($safeeval).'_parms.db',&GDBM_READER(),0640)) {
-        my %f=&getformulas($safeeval);
+            $sheet->{'coursefilename'}.'_parms.db',&GDBM_READER(),0640)) {
+        my %f=&getformulas($sheet);
         foreach (keys(%f))  {
             next if ($_!~/^A/);
             next if  ($f{$_}=~/^[\!\~\-]/);
             if ($f{$_}=~/^parameter/) {
                 if ($thisassess{$f{$_}}) {
-                    my $val=&parmval($f{$_},$safeeval,$sheetdata);
+                    my $val=&parmval($f{$_},$sheet);
                     $c{$_}=$val;
                     $c{$f{$_}}=$val;
                 }
@@ -2128,7 +2061,8 @@ sub loadassessment {
         }
         untie(%parmhash);
     }
-    &setconstants($safeeval,%c);
+    $sheet->{'constants'}=\%c;
+    &setconstants($sheet);
 }
 
 # --------------------------------------------------------- Various form fields
@@ -2161,12 +2095,12 @@ sub selectbox {
 #
 
 sub updatesheet {
-    my ($safeeval,$sheetdata)=@_;
-    my $stype=$sheetdata->{'sheettype'};
+    my ($sheet)=@_;
+    my $stype=$sheet->{'sheettype'};
     if ($stype eq 'classcalc') {
-	return &updateclasssheet($safeeval,$sheetdata);
+	return &updateclasssheet($sheet);
     } else {
-        return &updatestudentassesssheet($safeeval,$sheetdata);
+        return &updatestudentassesssheet($sheet);
     }
 }
 
@@ -2176,14 +2110,14 @@ sub updatesheet {
 #
 
 sub loadrows {
-    my ($safeeval,$sheetdata,$r)=@_;
-    my $stype=$sheetdata->{'sheettype'};
+    my ($sheet,$r)=@_;
+    my $stype=$sheet->{'sheettype'};
     if ($stype eq 'classcalc') {
-	&loadcourse($safeeval,$sheetdata,$r);
+	&loadcourse($sheet,$r);
     } elsif ($stype eq 'studentcalc') {
-        &loadstudent($safeeval,$sheetdata);
+        &loadstudent($sheet);
     } else {
-        &loadassessment($safeeval,$sheetdata);
+        &loadassessment($sheet);
     }
 }
 
@@ -2201,7 +2135,7 @@ sub forcedrecalc {
     if ($ENV{'form.forcerecalc'}) { return 1; }
     unless ($time) { return 1; }
     if ($stype eq 'assesscalc') {
-        my $map=(split(/\_\_\_/,$usymb))[0];
+        my $map=(split(/___/,$usymb))[0];
         if (&checkthis('::assesscalc:',$time) ||
             &checkthis('::assesscalc:'.$map,$time) ||
             &checkthis('::assesscalc:'.$usymb,$time) ||
@@ -2220,14 +2154,10 @@ sub forcedrecalc {
 }
 
 # ============================================================== Export handler
-#
-# Non-interactive call from with program
-#
-
 sub exportsheet {
     my ($uname,$udom,$stype,$usymb,$fn)=@_;
     my @exportarr=();
-    if (($usymb=~/^\_(\w+)/) && (!$fn)) {
+    if (defined($usymb) && ($usymb=~/^\_(\w+)/) && (!$fn)) {
         $fn='default_'.$1;
     }
     #
@@ -2236,8 +2166,8 @@ sub exportsheet {
     my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
     my $found='';
     if ($oldsheets{$key}) {
-        foreach (split(/\_\_\_\&\_\_\_/,$oldsheets{$key})) {
-            my ($name,$value)=split(/\_\_\_\=\_\_\_/,$_);
+        foreach (split(/___&\___/,$oldsheets{$key})) {
+            my ($name,$value)=split(/___=___/,$_);
             if ($name eq $fn) {
                 $found=$value;
             }
@@ -2246,8 +2176,8 @@ sub exportsheet {
     unless ($found) {
         &cachedssheets($uname,$udom,&Apache::lonnet::homeserver($uname,$udom));
         if ($oldsheets{$key}) {
-            foreach (split(/\_\_\_\&\_\_\_/,$oldsheets{$key})) {
-                my ($name,$value)=split(/\_\_\_\=\_\_\_/,$_);
+            foreach (split(/___&\___/,$oldsheets{$key})) {
+                my ($name,$value)=split(/___=___/,$_);
                 if ($name eq $fn) {
                     $found=$value;
                 }
@@ -2266,72 +2196,65 @@ sub exportsheet {
         #
         # Return what was cached
         #
-        @exportarr=split(/\_\_\_\;\_\_\_/,$found);
-    } else {
-        #
-        # Not cached
-        #        
-        my ($thissheet,$sheetdata)=&makenewsheet($uname,$udom,$stype,$usymb);
-        &readsheet($thissheet,$sheetdata,$fn);
-        &updatesheet($thissheet,$sheetdata);
-        &loadrows($thissheet,$sheetdata);
-        &calcsheet($thissheet,$sheetdata); 
-        @exportarr=&exportdata($thissheet,$sheetdata);
-        #
-        # Store now
-        #
-        my $cid=$ENV{'request.course.id'}; 
-        my $current='';
-        if ($stype eq 'studentcalc') {
-            $current=&Apache::lonnet::reply('get:'.
-                                            $ENV{'course.'.$cid.'.domain'}.':'.
-                                            $ENV{'course.'.$cid.'.num'}.
-                                            ':nohist_calculatedsheets:'.
-                                            &Apache::lonnet::escape($key),
-                                            $ENV{'course.'.$cid.'.home'});
-        } else {
-            $current=&Apache::lonnet::reply('get:'.$sheetdata->{'udom'}.':'.
-                                            $sheetdata->{'uname'}.
-                                            ':nohist_calculatedsheets_'.
-                                            $ENV{'request.course.id'}.':'.
-                                            &Apache::lonnet::escape($key),
-                                            $sheetdata->{'uhome'});
-        }
-        my %currentlystored=();
-        unless ($current=~/^error\:/) {
-            foreach (split(/___&\___/,&Apache::lonnet::unescape($current))) {
-                my ($name,$value)=split(/___=___/,$_);
-                $currentlystored{$name}=$value;
-            }
-        }
-        $currentlystored{$fn}=join('___;___',@exportarr);
-        #
-        my $newstore='';
-        foreach (keys(%currentlystored)) {
-            if ($newstore) { $newstore.='___&___'; }
-            $newstore.=$_.'___=___'.$currentlystored{$_};
-        }
-        my $now=time;
-        if ($stype eq 'studentcalc') {
-            &Apache::lonnet::reply('put:'.
-                                   $ENV{'course.'.$cid.'.domain'}.':'.
-                                   $ENV{'course.'.$cid.'.num'}.
-                                   ':nohist_calculatedsheets:'.
-                                   &Apache::lonnet::escape($key).'='.
-                                   &Apache::lonnet::escape($newstore).'&'.
-                                   &Apache::lonnet::escape($key).'.time='.$now,
-                                   $ENV{'course.'.$cid.'.home'});
-        } else {
-            &Apache::lonnet::reply('put:'.
-                                   $sheetdata->{'udom'}.':'.
-                                   $sheetdata->{'uname'}.
-                                   ':nohist_calculatedsheets_'.
-                                   $ENV{'request.course.id'}.':'.
-                                   &Apache::lonnet::escape($key).'='.
-                                   &Apache::lonnet::escape($newstore).'&'.
-                                   &Apache::lonnet::escape($key).'.time='.$now,
-                                   $sheetdata->{'uhome'});
-        }
+        @exportarr=split(/___;___/,$found);
+        return @exportarr;
+    }
+    #
+    # Not cached
+    #        
+    my ($sheet)=&makenewsheet($uname,$udom,$stype,$usymb);
+    &readsheet($sheet,$fn);
+    &updatesheet($sheet);
+    &loadrows($sheet);
+    &calcsheet($sheet); 
+    @exportarr=&exportdata($sheet);
+    #
+    # Store now
+    #
+    my $cid=$ENV{'request.course.id'}; 
+    my $current='';
+    if ($stype eq 'studentcalc') {
+        $current=&Apache::lonnet::reply('get:'.
+                                        $ENV{'course.'.$cid.'.domain'}.':'.
+                                        $ENV{'course.'.$cid.'.num'}.
+                                        ':nohist_calculatedsheets:'.
+                                        &Apache::lonnet::escape($key),
+                                        $ENV{'course.'.$cid.'.home'});
+    } else {
+        $current=&Apache::lonnet::reply('get:'.$sheet->{'udom'}.':'.
+                                        $sheet->{'uname'}.
+                                        ':nohist_calculatedsheets_'.
+                                        $ENV{'request.course.id'}.':'.
+                                        &Apache::lonnet::escape($key),
+                                        $sheet->{'uhome'});
+    }
+    my %currentlystored=();
+    unless ($current=~/^error\:/) {
+        foreach (split(/___&\___/,&Apache::lonnet::unescape($current))) {
+            my ($name,$value)=split(/___=___/,$_);
+            $currentlystored{$name}=$value;
+        }
+    }
+    $currentlystored{$fn}=join('___;___',@exportarr);
+    #
+    my $newstore='';
+    foreach (keys(%currentlystored)) {
+        if ($newstore) { $newstore.='___&___'; }
+        $newstore.=$_.'___=___'.$currentlystored{$_};
+    }
+    my $now=time;
+    if ($stype eq 'studentcalc') {
+        &Apache::lonnet::put('nohist_calculatedsheets',
+                             { $key => $newstore,
+                               $key.time => $now },
+                             $ENV{'course.'.$cid.'.domain'},
+                             $ENV{'course.'.$cid.'.num'})
+    } else {
+        &Apache::lonnet::put('nohist_calculatedsheets_'.$sheet->{'cid'},
+                             { $key => $newstore,
+                               $key.time => $now },
+                             $sheet->{'udom'},
+                             $sheet->{'uname'})
     }
     return @exportarr;
 }
@@ -2412,18 +2335,20 @@ sub cachedssheets {
 # Interactive call to screen
 #
 #
-
-
 sub handler {
     my $r=shift;
 
-     my $loaderror=&Apache::lonnet::overloaderror($r);
-     if ($loaderror) { return $loaderror; }
-     $loaderror=
-        &Apache::lonnet::overloaderror($r,
-          $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
-     if ($loaderror) { return $loaderror; } 
-
+    if (! exists($ENV{'form.Status'})) {
+        $ENV{'form.Status'} = 'Active';
+    }
+    # Check this server
+    my $loaderror=&Apache::lonnet::overloaderror($r);
+    if ($loaderror) { return $loaderror; }
+    # Check the course homeserver
+    $loaderror= &Apache::lonnet::overloaderror($r,
+                      $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
+    if ($loaderror) { return $loaderror; } 
+    
     if ($r->header_only) {
         $r->content_type('text/html');
         $r->send_http_header;
@@ -2442,6 +2367,10 @@ sub handler {
     # Get query string for limited number of parameters
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                             ['uname','udom','usymb','ufn']);
+    if ($ENV{'request.role'} =~ /^st\./) {
+        delete $ENV{'form.unewfield'}   if (exists($ENV{'form.unewfield'}));
+        delete $ENV{'form.unewformula'} if (exists($ENV{'form.unewformula'}));
+    }
     if (($ENV{'form.usymb'}=~/^\_(\w+)/) && (!$ENV{'form.ufn'})) {
         $ENV{'form.ufn'}='default_'.$1;
     }
@@ -2468,7 +2397,8 @@ sub handler {
     $r->send_http_header;
     # Screen output
     $r->print('<html><head><title>LON-CAPA Spreadsheet</title>');
-    $r->print(<<ENDSCRIPT);
+    if ($ENV{'request.role'} !~ /^st\./) {
+        $r->print(<<ENDSCRIPT);
 <script language="JavaScript">
 
     function celledit(cn,cf) {
@@ -2494,6 +2424,7 @@ sub handler {
 
 </script>
 ENDSCRIPT
+    }
     $r->print('</head>'.&Apache::loncommon::bodytag('Grades Spreadsheet').
               '<form action="'.$r->uri.'" name=sheet method=post>');
     $r->print(&hiddenfield('uname',$ENV{'form.uname'}).
@@ -2514,7 +2445,7 @@ ENDSCRIPT
     }
     # Read new sheet or modified worksheet
     $r->uri=~/\/(\w+)$/;
-    my ($asheet,$asheetdata)=&makenewsheet($aname,$adom,$1,$ENV{'form.usymb'});
+    my ($sheet)=&makenewsheet($aname,$adom,$1,$ENV{'form.usymb'});
     #
     # If a new formula had been entered, go from work copy
     if ($ENV{'form.unewfield'}) {
@@ -2522,24 +2453,19 @@ ENDSCRIPT
         $ENV{'form.unewformula'}=~s/\'/\"/g;
         $r->print('<p>New formula: '.$ENV{'form.unewfield'}.'='.
                   $ENV{'form.unewformula'}.'<p>');
-        &setfilename($asheet,$ENV{'form.ufn'});
-        &tmpread($asheet,$ENV{'form.unewfield'},$ENV{'form.unewformula'});
+        $sheet->{'filename'} = $ENV{'form.ufn'};
+        &tmpread($sheet,$ENV{'form.unewfield'},$ENV{'form.unewformula'});
     } elsif ($ENV{'form.saveas'}) {
-        &setfilename($asheet,$ENV{'form.ufn'});
-        &tmpread($asheet);
+        $sheet->{'filename'} = $ENV{'form.ufn'};
+        &tmpread($sheet);
     } else {
-        &readsheet($asheet,$asheetdata,$ENV{'form.ufn'});
+        &readsheet($sheet,$ENV{'form.ufn'});
     }
     # Print out user information
-    unless ($asheetdata->{'sheettype'} eq 'classcalc') {
-        $r->print('<p><b>User:</b> '.$asheetdata->{'uname'}.
-                  '<br><b>Domain:</b> '.$asheetdata->{'udom'});
-#        if (&getcsec($asheet) eq '-1') {
-#            $r->print('<h3><font color=red>'.
-#                      'Not a student in this course</font></h3>');
-#        } else {
-            $r->print('<br><b>Section/Group:</b> '.$asheetdata->{'csec'});
-#        }
+    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>'.
                       $ENV{'form.usymb'}.'</tt>');
@@ -2547,10 +2473,10 @@ ENDSCRIPT
     }
     #
     # Check user permissions
-    if (($asheetdata->{'sheettype'} eq 'classcalc'       ) || 
-        ($asheetdata->{'uname'}     ne $ENV{'user.name'} ) ||
-        ($asheetdata->{'udom'}      ne $ENV{'user.domain'})) {
-        unless (&Apache::lonnet::allowed('vgr',$asheetdata->{'cid'})) {
+    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;
@@ -2560,15 +2486,15 @@ ENDSCRIPT
     $r->print('<br />'.
               '<input type="submit" name="forcerecalc" '.
               'value="Completely Recalculate Sheet"><p>');
-    if ($asheetdata->{'sheettype'} eq 'assesscalc') {
+    if ($sheet->{'sheettype'} eq 'assesscalc') {
         $r->print('<p><font size=+2>'.
                   '<a href="/adm/studentcalc?'.
-                  'uname='.$asheetdata->{'uname'}.
-                  '&udom='.$asheetdata->{'udom'}.'">'.
+                  'uname='.$sheet->{'uname'}.
+                  '&udom='.$sheet->{'udom'}.'">'.
                   'Level up: Student Sheet</a></font><p>');
     }
-    if (($asheetdata->{'sheettype'} eq 'studentcalc') && 
-        (&Apache::lonnet::allowed('vgr',$asheetdata->{'cid'}))) {
+    if (($sheet->{'sheettype'} eq 'studentcalc') && 
+        (&Apache::lonnet::allowed('vgr',$sheet->{'cid'}))) {
         $r->print ('<p><font size=+2><a href="/adm/classcalc">'.
                    'Level up: Course Sheet</a></font><p>');
     }
@@ -2581,13 +2507,13 @@ ENDSCRIPT
                   '<input type=text size=20 name=newfn value="'.$fname.'">'.
                   'make default: <input type=checkbox name="makedefufn"><p>');
     }
-    $r->print(&hiddenfield('ufn',&getfilename($asheet)));
+    $r->print(&hiddenfield('ufn',$sheet->{'filename'}));
     # Load dialog
     if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
         $r->print('<p><input type=submit name=load value="Load ...">'.
                   '<select name="loadthissheet">'.
                   '<option name="default">Default</option>');
-        foreach (&othersheets($asheet,$asheetdata->{'sheettype'})) {
+        foreach (&othersheets($sheet)) {
             $r->print('<option name="'.$_.'"');
             if ($ENV{'form.ufn'} eq $_) {
                 $r->print(' selected');
@@ -2595,37 +2521,37 @@ ENDSCRIPT
             $r->print('>'.$_.'</option>');
         } 
         $r->print('</select><p>');
-        if ($asheetdata->{'sheettype'} eq 'studentcalc') {
-            &setothersheets($asheet,&othersheets($asheet,'assesscalc'));
+        if ($sheet->{'sheettype'} eq 'studentcalc') {
+            &setothersheets($sheet,
+                            &othersheets($sheet,'assesscalc'));
         }
     }
     # Cached sheets
     &expirationdates();
     undef %oldsheets;
     undef %loadedcaches;
-    if ($asheetdata->{'sheettype'} eq 'classcalc') {
+    if ($sheet->{'sheettype'} eq 'classcalc') {
         $r->print("Loading previously calculated student sheets ...\n");
         $r->rflush();
         &cachedcsheets();
-    } elsif ($asheetdata->{'sheettype'} eq 'studentcalc') {
+    } elsif ($sheet->{'sheettype'} eq 'studentcalc') {
         $r->print("Loading previously calculated assessment sheets ...\n");
         $r->rflush();
-        &cachedssheets($asheetdata->{'uname'},$asheetdata->{'udom'},
-                       $asheetdata->{'uhome'});
+        &cachedssheets($sheet->{'uname'},$sheet->{'udom'},$sheet->{'uhome'});
     }
     # Update sheet, load rows
     $r->print("Loaded sheet(s), updating rows ...<br>\n");
     $r->rflush();
     #
-    &updatesheet($asheet,$asheetdata);
+    &updatesheet($sheet);
     $r->print("Updated rows, loading row data ...\n");
     $r->rflush();
     #
-    &loadrows($asheet,$asheetdata,$r);
+    &loadrows($sheet,$r);
     $r->print("Loaded row data, calculating sheet ...<br>\n");
     $r->rflush();
     #
-    my $calcoutput=&calcsheet($asheet);
+    my $calcoutput=&calcsheet($sheet);
     $r->print('<h3><font color=red>'.$calcoutput.'</h3></font>');
     # See if something to save
     if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
@@ -2633,22 +2559,23 @@ ENDSCRIPT
         if ($ENV{'form.saveas'} && ($fname=$ENV{'form.newfn'})) {
             $fname=~s/\W/\_/g;
             if ($fname eq 'default') { $fname='course_default'; }
-            $fname.='_'.$asheetdata->{'sheettype'};
-            &setfilename($asheet,$fname);
+            $fname.='_'.$sheet->{'sheettype'};
+            $sheet->{'filename'} = $fname;
             $ENV{'form.ufn'}=$fname;
             $r->print('<p>Saving spreadsheet: '.
-                      &writesheet($asheet,$ENV{'form.makedefufn'}).'<p>');
+                      &writesheet($sheet,$ENV{'form.makedefufn'}).
+                      '<p>');
         }
     }
     #
-    #Write the modified worksheet
-    $r->print('<b>Current sheet:</b> '.&getfilename($asheet).'<p>');
-    &tmpwrite($asheet);
-    if ($asheetdata->{'sheettype'} eq 'studentcalc') {
+    # Write the modified worksheet
+    $r->print('<b>Current sheet:</b> '.$sheet->{'filename'}.'<p>');
+    &tmpwrite($sheet);
+    if ($sheet->{'sheettype'} eq 'studentcalc') {
         $r->print('<br>Show rows with empty A column: ');
     } else {
         $r->print('<br>Show empty rows: ');
-    } 
+    }
     #
     $r->print(&hiddenfield('userselhidden','true').
               '<input type="checkbox" name="showall" onClick="submit()"');
@@ -2667,17 +2594,17 @@ ENDSCRIPT
     $r->print('>');
     #
     # CSV format checkbox (classcalc sheets only)
-    if ($asheetdata->{'sheettype'} eq 'classcalc') {
-        $r->print(' Output CSV format: <input type="checkbox" '.
-                  'name="showcsv" onClick="submit()"');
-        if ($ENV{'form.showcsv'}) { $r->print(' checked'); }
-        $r->print('>');
+    $r->print(' Output CSV format: <input type="checkbox" '.
+              'name="showcsv" onClick="submit()"');
+    $r->print(' checked') if ($ENV{'form.showcsv'});
+    $r->print('>');
+    if ($sheet->{'sheettype'} eq 'classcalc') {
+        $r->print('&nbsp;Student Status: '.
+                  &Apache::lonhtmlcommon::StatusOptions
+                  ($ENV{'form.Status'},'sheet'));
     }
     #
     # Buttons to insert rows
-    $r->print('&nbsp;Student Status: '.
-              &Apache::lonhtmlcommon::StatusOptions
-              ($ENV{'form.Status'},'sheet'));
     $r->print(<<ENDINSERTBUTTONS);
 <br>
 <input type='button' onClick='insertrow("top");' 
@@ -2686,7 +2613,7 @@ value='Insert Row Top'>
 value='Insert Row Bottom'><br>
 ENDINSERTBUTTONS
     # Print out sheet
-    &outsheet($r,$asheet,$asheetdata);
+    &outsheet($r,$sheet);
     $r->print('</form></body></html>');
     #  Done
     return OK;
@@ -2694,7 +2621,3 @@ ENDINSERTBUTTONS
 
 1;
 __END__
-
-
-
-