--- loncom/xml/londefdef.pm	2010/07/21 02:00:37	1.418
+++ loncom/xml/londefdef.pm	2011/11/14 00:20:42	1.436
@@ -1,7 +1,8 @@
+
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.418 2010/07/21 02:00:37 www Exp $
+# $Id: londefdef.pm,v 1.436 2011/11/14 00:20:42 raeburn Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -43,11 +44,11 @@ use Apache::lonnet;
 use strict;
 use Apache::lonxml;
 use Apache::lontable;
-use Apache::File();
 use Image::Magick;
 use Apache::lonmenu();
 use Apache::lonmeta();
 use Apache::lonlocal;
+use Apache::loncommon();
 use Apache::Constants qw(:common);
 use File::Basename;
 use LONCAPA();
@@ -383,6 +384,9 @@ sub start_meta {
 	} else {
 	    $currentstring = $token->[4];
 	}
+        if ($env{'form.grade_imsexport'}) {
+            $currentstring = '';
+        }
     } elsif ($target eq 'meta') {
 	unless (&Apache::lonxml::get_param
 		('http-equiv',$parstack,$safeeval,undef,1)) {
@@ -541,9 +545,10 @@ sub start_body {
     # Breadcrumbs
     &Apache::lonhtmlcommon::clear_breadcrumbs();
     if ($env{'request.state'} eq 'construct') {
+        my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
         &Apache::lonhtmlcommon::add_breadcrumb({
             'text'  => 'Construction Space',
-            'href'  => &Apache::loncommon::authorspace(),
+            'href'  => &Apache::loncommon::authorspace($url),
         });
         &Apache::lonhtmlcommon::add_breadcrumb({
             'text'  => 'HTML Editor',
@@ -589,7 +594,7 @@ sub start_body {
 sub edit_controls {
     my ($nochgview) = @_;
     my $result .= '
-<form method="post">
+<form method="post" action="">
 <div class="LC_edit_problem_header">';
     unless ($nochgview) {
         $result .= '
@@ -601,7 +606,12 @@ sub edit_controls {
     $result .= '
 <div><input type="submit" name="editmode" accesskey="e" value="'.&mt('Edit').'" />';
     if (($env{'request.course.id'}) && ($env{'form.forceedit'})) {
-        $result .= ('&nbsp;' x 3).'<input type="button" value="'.&mt('Course View').'" onclick="javascript:location.href=currentURL" />';
+        my $viewtext = &mt('Course View');
+        if (&Apache::loncommon::course_type() eq 'Community') {
+            $viewtext = &mt('Community View');
+        }
+        $result .= ('&nbsp;' x 3).'<input type="button" value="'.
+                   $viewtext.'" onclick="javascript:location.href=currentURL" />';
     }
     $result .= '</div>
 </div>
@@ -2039,38 +2049,53 @@ sub start_table {
     } elsif ($target eq 'tex') {
 	&disable_para();	# Can't have paras in a table.
 
-
-	#  New table code:
-
 	#  Get the parameters that we can do something about:
 
 	my $border = &Apache::lonxml::get_param('border', $parstack, $safeeval, undef, 0);
 	my $width  = &Apache::lonxml::get_param('TeXwidth', $parstack, $safeeval, undef, 0);
 	my $theme  = &Apache::lonxml::get_param('TeXtheme', $parstack, $safeeval, undef, 0);
 	my $align  = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 0);
+	my $cell_border = &Apache::lonxml::get_param('rules', $parstack, $safeeval, undef, 0);
 
 	# The only thing that needs any figuring out is the width.. and then only if it is
 	# a percent. If not it's assumed to be some valid TeX measurement unit e.g. 3.0cm
 	#
 
 	my $table = new Apache::lontable();
-	if ($border ne '') {
+	if ((defined $border) && ($border > 0)) {
+	#    &Apache::lonnet::logthis("Turning on table borders: $border");
 	    $table->table_border(1);
-	    $table->cell_border(1);
+	    if (!defined $cell_border) {
+		$table->cell_border(1); # Default for rules is all if rules not defined.
+	    }
 	}
-	if ($theme ne '') {
+
+	if ((defined $cell_border)) {
+	    if ($cell_border eq 'all') {
+		$table->cell_border(1);
+	    } elsif ($cell_border eq 'rows') {
+		$table->cell_border(2);
+	    } elsif ($cell_border eq 'cols') {
+		$table->cell_border(3);
+	    } elsif($cell_border eq 'groups') {
+		$table->cell_border(4);
+	    } else {
+		$table->cell_border(0);
+	    }
+	}
+	if (defined $theme) {
 	    $table->theme($theme);
 	}
-	if ($align ne '') {
+	if (defined $align) {
 	    $table->alignment($align);
 	}
 
 	# Missing width is most of page width
 
-	if ($width eq "") {
+	if (!(defined $width)) {
 	    $width = '70%';
 	}
-	
+
 	# If a percentage, need to calculate what this means in terms of
 	# page width:
 	
@@ -2085,88 +2110,6 @@ sub start_table {
 	push(@Apache::londefdef::table, $table);
         $currentstring.=' \keephidden{NEW TABLE ENTRY}';
 
-	#--------------------------------------------------------
-	#  Old table code here.
-	#--------------------------------------------------------
-
-
-	if (0) {
-	push(@Apache::londefdef::table, {}); 
-	$Apache::londefdef::table[-1]{'row_number'} = -1;
-        #maximum table's width (default coincides with text line length)
-	if ($#Apache::londefdef::table==0) {
-	    $textwidth=&recalc($env{'form.textwidth'}); #result is always in mm
-	    $textwidth=~/(\d+\.?\d*)/;
-	    $textwidth=0.85*$1; #accounts "internal" LaTeX space for table frame
-	} else {
-	    if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
-		#the maximum width of nested table is determined by LATeX width of parent cell
-		$textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
-	    } else {
-              #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
-		$textwidth=$Apache::londefdef::table[-2]{'width'};
-		for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
-		    $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
-		}
-	    }
-	}
-
-	# width either comes forced from the TeXwidth or the width parameters.
-	# in either case it can be a percentage or absolute width.
-	# in the width case we ignore absolute width 
-	my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
-	if (!defined($TeXwidth)) {
-	    my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,
-						       $safeeval,undef,1);
-	    if ($htmlwidth =~ /%/) {
-		$TeXwidth = $htmlwidth;
-	    } else { 
-		$TeXwidth = $textwidth;
-	    }
-	}
-	# if the width is specified as a % it is converted to an absolute width.
-	# otherwise.. just plugged right in the hash
-
-	if ($TeXwidth=~/%/) {
-	    $TeXwidth=~/(\d+)/;
-            $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
-	} else {
-	    $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
-	}
-        #  In the end, however the table width cannot be wider than $textwidth...
-	
-	if ($Apache::londefdef::table[-1]{'width'} > $textwidth) {
-	    $Apache::londefdef::table[-1]{'width'} = $textwidth;
-	}
-        #table's border
-	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
-        my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
-	unless (defined $border) { $border = 0; }
-	if ($border) { 
-	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
-	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
-	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
-	} else {
-	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
-	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
-	    $Apache::londefdef::table[-1]{'vvinc'} = '';
-	}
-	if ($#Apache::londefdef::table==0) {
-	    #    Note that \newline seems to destroy the alignment envs.
-	    # $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
-	    $Apache::londefdef::table[-1]{'output'}='\strut'.'\\\\'."\n".'\strut\setlength{\tabcolsep}{1 mm}';
-	}
-	$Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
-        $Apache::londefdef::table[-1]{'TeXlen'}=[];
-        $Apache::londefdef::table[-1]{'objectlen'}=[];
-        $Apache::londefdef::table[-1]{'objectsignal'}=[];
-        $Apache::londefdef::table[-1]{'maxlen'}=[];
-        $Apache::londefdef::table[-1]{'minlen'}=[];
-        $Apache::londefdef::table[-1]{'content'}=[];
-        $Apache::londefdef::table[-1]{'align'}=[];
-        $currentstring.=' \keephidden{NEW TABLE ENTRY}';
-    }
-
     }
     return $currentstring;
 }
@@ -2177,435 +2120,15 @@ sub end_table {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];     
     } elsif ($target eq 'tex') {
-
-
-	#  New table code:
-
+	
+	
 	my $table = pop(@Apache::londefdef::table);
 	my $t     = $table->generate();
+	# &Apache::lonnet::logthis("Generating string");
 	$currentstring = $t->generate_string();
+	# &Apache::lonnet::logthis("Generated: $currentstring");
 	&enable_para();
-	#--------------------------------------------------------------
-	#  Old table code:
-	#--------------------------------------------------------------
-
-	if (0) {
-
-	my $border =  &Apache::lonxml::get_param('border',$parstack,$safeeval);
-	my $inmemory = '';
-	my $output = '';
-	my $WARNING='';
-        #width of columns from TeXwidth attributes
-
-	# Protect against unbalanced </table> tag.
-
-	if (scalar(@Apache::londefdef::table) > 0) {
-
-	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
-		if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
-		    $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
-		}	
-	    }
-	}
-        #free space and number of empty columns
-	my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
-	if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
-	for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
-	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
-		$empty_columns++;
-	    } else {
-		$available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
-	    }
-	}
-
-        #boundaries for contents columns
-	my @min_len=();#columns can not be narrower 
-	my @max_len=();#maximum length of column
-	my $avg_max;
-	my $avg_min;
-	my $counter_cols = $Apache::londefdef::table[-1]{'counter_columns'};
-	for (my $jn=0;$jn<=$counter_cols; $jn++) {
-		my ($localmin,$localmax)=(0,0);
-		for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-		    if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
-			$localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
-		    }
-		    if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
-			$localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
-		    }
-		}
-		push @min_len, $localmin;
-		push @max_len, $localmax;
-		$avg_max = $localmax + $avg_max;
-		$avg_min = $localmin + $avg_min;
-	}
-	# Does not really matter what the average max/min are if there are no cols.
-	# and this prevents div 0 in that case.
-
-	if ($counter_cols != 0) {
-	    $avg_max = $avg_max/$counter_cols;
-	    $avg_min = $avg_min/$counter_cols;
-	}
-
-
-	#  I don't think the below is needed.. but just in case:
-
-	if ($avg_min > $avg_max) {
-	    my $temp = $avg_min;
-	    $avg_min = $avg_max;
-	    $avg_max = $temp;
-	}
-
-
-	for (my $jn=0;$jn<=$counter_cols;$jn++) {
-	    my $localmin=0,;
-	    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-		if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
-		    $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
-		}
-	    }
-	    if ($max_len[$jn]<$localmin) {
-		$max_len[$jn]=$localmin;
-	    	$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
-	    }#object size is bigger
-	    if ($min_len[$jn]<$localmin) {
-		$min_len[$jn]=$localmin;
-		$Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
-	    }#object size is bigger
-	    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
-		$min_len[$jn]=0;
-		$max_len[$jn]=0;
-	    }
-	    #  Spans seem to be really bothered by max/min = 0.  So if we have one
-	    #  make it an average joe max/min.
-	    
-	    if ($max_len[$jn] == 0) {
-		$max_len[$jn] = $avg_max;
-	    }
-	    if ($min_len[$jn] == 0) {
-		$min_len[$jn] = $avg_min;
-	    }
-
-	}
-       #final adjustment of column width
-	my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
-	my @adjust=();
-        #step 1. adjustment by maximum value
-	my $space_needed=0;
-	for (my $jn=0;$jn<=$#max_len;$jn++) {
-	    $space_needed=$space_needed+$max_len[$jn];
-	}
-	if ($space_needed<=$available_space) {
-
-	    for (my $jn=0;$jn<=$#max_len;$jn++) {
-		if ($fwidth[$jn]==0) {
-		    $fwidth[$jn]=$max_len[$jn];
-		}
-	    }
-	} else {
-        #step 2. adjustment by minimum value (estimation)
-	    $space_needed=0;
-	    for (my $jn=0;$jn<=$#min_len;$jn++) {
-		$space_needed+=$min_len[$jn];
-	    }
-	    if ($space_needed>$available_space) {
-		$WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
-		for (my $jn=0;$jn<=$#max_len;$jn++) {
-		    if ($fwidth[$jn]==0) {
-			$fwidth[$jn]=$min_len[$jn];
-		    }
-		}
-		#check if we have objects which can be scaled
-		my $how_many_to_scale=0;
-		my @to_scale=();
-		for (my $jn=0;$jn<=$#max_len;$jn++) {
-		    if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
-			$how_many_to_scale++;
-			push @to_scale, $jn;
-		    }
-		}
-		if ($how_many_to_scale>0) {
-		    my $space_to_adjust=($space_needed-$available_space)/$how_many_to_scale;
-		    foreach my $jn (@to_scale) {
-			for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
-			    if ($1 ne '') {
-				my $current_length=&recalc($1);
-				$current_length=~/(\d+\.?\d*)/;
-				$current_length=$current_length-$space_to_adjust;
-				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
-			    }
-			    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
-			    if ($1 ne '') {
-				my $current_length=$1;
-				$current_length=$current_length-$space_to_adjust;
-				$Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
-			    }				
-			}
-			$fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
-		    }
-		}
-	    } else {
-	      #step 3. adjustment over minimal + corrections
-		my $enlarge_coef=$available_space/$space_needed;
-		my $acsessive=0;
-		for (my $jn=0;$jn<=$#min_len;$jn++) {
-		    $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
-		    if ($adjust[$jn]>$max_len[$jn]) {
-			$fwidth[$jn]=$max_len[$jn];
-			$acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
-			$adjust[$jn]=0;
-
-		    }
-		}
-		if ($acsessive>0) {
-		#we have an excess of space and can redistribute it
-		    my $notempty_columns=0;
-		    for (my $jn=0;$jn<=$#min_len;$jn++) {
-			if ($adjust[$jn]!=0) {
-			    $notempty_columns++;
-			}
-		    }
-		    my $per_column=$acsessive/$notempty_columns;
-		    for (my $jn=0;$jn<=$#min_len;$jn++) {
-			if ($adjust[$jn]!=0) {
-			    $adjust[$jn]+=$per_column;
-			    $fwidth[$jn]=$adjust[$jn];
-			}
-		    }
-		} else {
-		    for (my $jn=0;$jn<=$#min_len;$jn++) {
-			$fwidth[$jn]=$adjust[$jn];
-		    }
-		}
-	    }
-	}
-        # use all available width or specified width as if not specified,
-	# the specified width gets defaulted to the available width.
-
-	my $current=0; 
-	for (my $i=0;$i<=$#fwidth;$i++) {  
-	    $current+=$fwidth[$i];
-	}
-	if ($current == 0) {
-            $current = $Apache::londefdef::table[-1]{'width'};
-        }
-	my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
-	for (my $i=0;$i<=$#fwidth;$i++) {  
-	    $fwidth[$i]*=$coef;
-	}
-        #removing of empty columns if allowed
-        my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
-	if ($permission eq 'yes') {
-	    my @cleaned_table=();
-            my @cleaned_header=();
-	    my $colind=0;
-	    for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
-		if ($fwidth[$jn]!=0) {
-		    #we need to copy column
-		    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-			$cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
-			$cleaned_header[$colind]=$fwidth[$jn];
-		    }
-		    $colind++;
-		}
-	    }
-	    $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
-	    @fwidth=@cleaned_header;
-	}
-
-
-	#construct header of the table
-	my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
-	for (my $in=0;$in<=$#fwidth;$in++) {
-	    $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
-	}
-	$header_of_table .= '}';
-
-	#fill the table
-	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-	    my $have_rowspan = 0;
-	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
-
-		#-----------------------------------------------------------
-                #   I think this order of doing things will ensure that
-		#   single rowspan, columspan and combined row/colspans will
-                #   work correctly.  LaTeX is delicate here.
-		#    RF.
-		
-		# Start a rowspan if necessary:
-		
-		my $primary_col_width = $fwidth[$jn]; # Width of primary column.
-		my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
-		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
-		#
-		#  Do the appropriate magic if this has a colspan
-		# 
-		
-		my $border_char = "";
-		if ($border) {
-		    $border_char = "|";
-		}
-		my $spanwidth = 0;
-		if ($colspan > 1) {
-		    for (my $spancol = $jn; $spancol < $jn + $colspan; $spancol++) {
-			$spanwidth += $fwidth[$spancol];
-		    }
-		    $output .= '\multicolumn{'.
-			$colspan
-			."}";
-		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
-			$output .= '{'.$border_char.'c'.$border_char.'}{';
-		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
-			$output .= '{'.$border_char.'r'.$border_char.'}{';
-		    }
-		    else {
-			$output .= '{'.$border_char."p{$spanwidth mm}".$border_char.'}{';
-		    }
-		    
-		} else {
-		    $spanwidth = $primary_col_width; # If no span width will be just colwidth
-		}
-
-		# Rowspan... if colspan is 1, and there's an alignment we'll need
-		# to kick in a multicolumn in order to get the alignment spec.
-		# this must precede the multirow or LaTex gets quite upset.
-		# Naturally if colspan > 1 we've already done that above ^
-		#
-		my $multirow_aligned = 0;
-		if ($rowspan > 1) {
-		    if ($colspan == 1) {
-			if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
-			    $output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
-			    $multirow_aligned = 1;
-			} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
-			    $output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
-			    $multirow_aligned = 1;
-			}
-		    }
-		    $have_rowspan++;
-		    if ($multirow_aligned) {
-			$output .= '\multirow{'.$rowspan.'}[0]{*}{';
-		    } else {
-			$output .= '\multirow{'.$rowspan."}[0]{$spanwidth mm}{";
-		    }
-		    
-		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
-			s{^\s*\\par\s*}{};
-		    $Apache::londefdef::table[-1]{'content'}[$in][$jn] =~
-			s{\s*\\vskip\s*0pt\s*$}{};
-			  
-		    #
-		    # If we did not throw in a multicolumn to align, then add 
-		    # an extra {
-		    # so we close correctly without having to keep additional state
-		    # around
-		    #
-		    if (!$multirow_aligned) {
-			$output .= '{';
-		    }
-		}
-		if (($rowspan eq '^') || ($rowspan eq '_')) {
-		    $have_rowspan++;
-		}
-		    #--------------------------------------------------------------
-
-
-		# For right and center alignment of single cells.
-		# we are going to use a multicolumn with a span of 1 to specify alignment.
-		#
-		if ($colspan == 1  && $rowspan == 1) {
-		    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
-			$output .= '\multicolumn{1}{'.$border_char.'c'.$border_char.'}{';
-		    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
-			$output .= '\multicolumn{1}{'.$border_char.'r'.$border_char.'}{';
-		    }
-		}
-
-		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
-
-		if (($colspan == 1 && $rowspan == 1)   &&
-		    (($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') ||
-		     ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r'))) {
-		    $output .= '}';
-		}
-
-		# Close off any open multirow:
-		
-		if ($rowspan > 1) {
-		    $output .= '}}';
-		}
-		#  Close off the colspan...
-		#
-		if ($colspan > 1)  {
-		    $output .= '}';
-		    $jn += $colspan-1; # Adjust for number of rows really left.
-		}
-                if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
-	    }
-	    #  If have_rowspan > 0, and borders are on, then 
-	    #  we need to do more than put an \hline at the bottom of row.
-	    #  we need to do the appropriate \cline to ensure that
-	    #  the spanned rows don't have \hlines through them.
-
-	    if (($Apache::londefdef::table[-1]{'hinc'} =~ /\\hline/) && $have_rowspan) {
-		$output .= ' \\\\ ';
-		for (my $jn=0; $jn<=$#fwidth;$jn++) {
-		    my $rowspan = $Apache::londefdef::table[-1]{'rowspan'}[$in][$jn];
-		    if ($rowspan ne "^") {
-			if (($rowspan <= 1) || ($rowspan eq '_')) {
-			    my $column = $jn+1;
-			    $output .= '\cline{'.$column.'-'.$column.'} ';
-			}
-		    }
-		}
-
-	    } else {
-		$output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
-	    }
-	}
-	# Note that \newline destroys alignment env's produced  by e.g. <div>
-	# $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
-	$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut'.'\\\\'."\n".'\strut ';
-	if ($#Apache::londefdef::table > 0) {	    
-	    my $inmemory = $Apache::londefdef::table[-1]{'output'};
-	    # Figure out max/and min width  by summing us and then
-	    # apply that to the current column of the table we nest in
-	    # if it's larger than the current width or the current width
-	    # is undefined.
-	    #
-	    my $min_nested_width = 0;
-	    my $max_nested_width = 0;
-	    for (my $col = 0; $col <= $Apache::londefdef::table[-1]{'counter_columns'}; $col++) {
-		$min_nested_width +=  $min_len[$col];
-		$max_nested_width +=  $max_len[$col];
-		
-	    }
-	    # Fudge in an extra 5 mm for borders etc:
-	    
-	    $min_nested_width += 5;
-	    $max_nested_width += 5;
-
-	    my $outer_column = $Apache::londefdef::table[-2]{'counter_columns'};
-	    my $outer_row    = $Apache::londefdef::table[-2]{'row_number'};
-	    if ($min_nested_width > $Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column]) {
-		$Apache::londefdef::table[-2]{'minlen'}[$outer_row][$outer_column] = $min_nested_width;
-	    }
-	    if ($max_nested_width > $Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column]) {
-		$Apache::londefdef::table[-2]{'maxlen'}[$outer_row][$outer_column] = $max_nested_width;
-	    }
-
-	    pop @Apache::londefdef::table;
-	    push @{$Apache::londefdef::table[-1]{'include'}}, $inmemory;
-	} else {
-	    $currentstring .= $Apache::londefdef::table[-1]{'output'};
-	    pop @Apache::londefdef::table;
-	    undef @Apache::londefdef::table;
-	}
-	}
-	&enable_para();
-    }
+	
     }
     return $currentstring;
 }
@@ -2722,17 +2245,26 @@ sub tag_check {
 #
 
 sub cell_config_hash {
-    my ($align, $rowspan, $colspan) = @_;
+    my ($align, $rowspan, $colspan, $width) = @_;
+    if ($rowspan ne '') {
+        $rowspan =~ s/^\s+|\s+$//g; 
+    }
+    if ($colspan ne '') {
+        $colspan =~ s/^\s+|\s+$//g;
+    }
     my %config;
     if ($align ne '') {
 	$config{'halign'} = $align;
     }
-    if ($colspan ne "") {
+    if (($colspan =~ /^\d+$/) && ($colspan > 0)) {
 	$config{'colspan'} = $colspan;
     }
-    if ($rowspan ne '') {
+    if (($rowspan =~ /^\d+$/) && ($rowspan > 0)) {
 	$config{'rowspan'} = $rowspan;
     }
+    if ($width ne '') {
+	$config{'width'} = $width;
+    }
     return \%config;
 }
  
@@ -2744,11 +2276,11 @@ sub start_td_tex {
     # attributes, but empty of text.  end_td_tex will
     # fetch the contents from the recursive parse and
     # fill the cell with them:
-    my $align   = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
-    my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
-    my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
-
-    my $config = &cell_config_hash($align, $rowspan, $colspan);
+    my $align   = &Apache::lonxml::get_param('align', $parstack, $safeeval);
+    my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval);
+    my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval);
+    my $width   = &Apache::lonxml::get_param('TeXwidth', $parstack, $safeeval);
+    my $config = &cell_config_hash($align, $rowspan, $colspan, $width);
 
     my $table = $Apache::londefdef::table[-1];
     $table->add_cell('', $config);
@@ -3354,10 +2886,7 @@ sub start_applet {
     &Apache::lonxml::extlink($archive);
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
-        $currentstring = &Apache::lonenc::encrypt_ref($token,
-                                                      {'code'=>$code,
-                                                       'archive'=>$archive}
-                                                     );
+        $currentstring = $token->[4];
     } elsif ($target eq 'tex') {
         # Turn off some stuff we can't be inside thank you LaTeX
 
@@ -3855,13 +3384,34 @@ sub end_col {
     return $currentstring;
 }
 
-#-- <colgroup> tag (end tag optional)
+#-- <colgroup tag (end tag optional)
 sub start_colgroup {
-    my ($target,$token) = @_;
+    my ($target,$token,$tagstack, $parstack, $parser, $safeeval, $style) = @_;
     my $currentstring = '';
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+	# TODO: Ensure this tag is in a table:
+
+	# Fetch the attributes and build the hash for the
+	# call to define_colgroup.
+
+	my $span    = &Apache::lonxml::get_param('span',   $parstack, $safeeval);
+	my $halign  = &Apache::lonxml::get_param('halign', $parstack, $safeeval);
+
+	my %colgroup_params;
+	if ($span ne '') {
+	    $colgroup_params{'span'} = $span;
+	}
+	if ($halign ne '') {
+	    $colgroup_params{'halign'} = $halign;
+	}
+	
+	my $table = $Apache::londefdef::table[-1];
+	$table->define_colgroup(\%colgroup_params);
+
+    }
     return $currentstring;
 }
 
@@ -4355,6 +3905,12 @@ sub start_tbody {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+	# TODO: Ensure this tag is within a table:
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_body();
+    }
     return $currentstring;
 }
 
@@ -4364,6 +3920,12 @@ sub end_tbody {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];    
     } 
+    if($target eq 'tex') {
+	# TODO: Ensure this tag is within a table:
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_body();
+    }
     return $currentstring;
 }
 
@@ -4374,6 +3936,11 @@ sub start_tfoot {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+        # TODO: ensure this is within a table tag.
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_foot();
+    }
     return $currentstring;
 }
 
@@ -4383,6 +3950,11 @@ sub end_tfoot {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];    
     } 
+    if ($target eq 'tex') {
+	#  TODO: Ensure this is in side a table 
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_foot();
+    }
     return $currentstring;
 }
 
@@ -4393,6 +3965,11 @@ sub start_thead {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[4];     
     } 
+    if ($target eq 'tex') {
+	# Assume we're in a table... TODO: Verify that and ignore tag if not.
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_head();
+    }
     return $currentstring;
 }
 
@@ -4402,6 +3979,12 @@ sub end_thead {
     if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];    
     } 
+    if ($target eq 'tex') {
+     	# TODO: Verify we are in a table and ignore tag if not.
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_head();
+    }
     return $currentstring;
 }
 
@@ -4604,15 +4187,15 @@ sub get_eps_image {
 
 		#if replication failed try to produce eps file dynamically
 		$src=~s/\.ps$/\.eps/;
-		my $temp_file;
-		open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
-		my $newsrc=$orig_src;
-		$newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
-		&Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
-		print FILE ("$newsrc\n");
-		close(FILE);
+		if (open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat")) {
+		    my $newsrc=$orig_src;
+		    $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
+		    &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
+		    print FILE ("$newsrc\n");
+		    close(FILE);
+                }
 		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
-		$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
+		$src=~s|/home/httpd/html/priv/[^/]+/([^/]*)/|/home/httpd/prtspool/$1/|;
 		if ($sext ne "") {	 # Put the ext. back in to uniquify.
 		    $src =~ s/\.eps$/$sext.eps/;
 		}
@@ -4631,7 +4214,7 @@ sub get_eps_image {
 	print FILE "$src\n";
 	close FILE;
 	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
-	$src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
+	$src=~s|/home/httpd/html/priv/[^/]+/([^/]*)/|/home/httpd/prtspool/$1/|;
     }
     my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
     $path =~ s/ /\_/g;
@@ -4643,12 +4226,14 @@ sub get_eps_image {
 sub eps_generation {
     my ($src,$file,$width_param) = @_;	     
     my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
-    my $temp_file = Apache::File->new('>>'.$filename); 
-    print $temp_file "$src\n";
+    if (open(my $tmpfile,">>$filename")) { 
+        print $tmpfile "$src\n";
+        close($tmpfile);
+    }
     my $newsrc = $src;
     $newsrc =~ s/(\.bmp|\.gif|\.jpg|\.jpeg)$/\.eps/i;
     $newsrc=~s{/home/httpd/html/res}{};
-    $newsrc=~s{/home/($LONCAPA::username_re)/public_html/}{/$1/};
+    $newsrc=~s{/home/httpd/html/priv/[^/]+/($LONCAPA::username_re)/}{/$1/};
     $newsrc=~s{/\./}{/};
     $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
     if ($newsrc=~m{/home/httpd/lonUsers/}) {