--- loncom/xml/londefdef.pm	2006/01/09 22:54:47	1.302.2.2
+++ loncom/xml/londefdef.pm	2005/12/23 00:12:32	1.305
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Tags Default Definition Module 
 #
-# $Id: londefdef.pm,v 1.302.2.2 2006/01/09 22:54:47 albertel Exp $
+# $Id: londefdef.pm,v 1.305 2005/12/23 00:12:32 foxr Exp $
 # 
 #
 # Copyright Michigan State University Board of Trustees
@@ -68,7 +68,6 @@ BEGIN {
 #    for ($row =0; $row <= $lastrow; $row++ ) {
 #	my $text = Dumper($Apache::londefdef::table[$row]);
 #	&Apache::lonnet::logthis("table [ $row ]".$text);
-#
 #    }
 #}
 sub initialize_londefdef {
@@ -594,34 +593,25 @@ sub end_body {
     return $currentstring;
 }
 
-# \begin{center} causes a new paragprah spacing that looks odd inside 
-# of a table cell
-sub center_correction { return '\vspace*{-6 mm}'; }
 #-- <center> tag (end tag required)
 sub start_center {
-    my ($target,$token,$tagstack) = @_;
+    my ($target,$token) = @_;
     my $currentstring = &end_p();	# Close off any prior para.
     if ($target eq 'web') {
 	$currentstring .= $token->[4];     
     } elsif ($target eq 'tex') {
-	if (&is_inside_of($tagstack, "table")) {
-	    $currentstring .= &center_correction();
-	}
 	$currentstring .= '\begin{center}';  
     }
     return $currentstring;
 }
 
 sub end_center {
-    my ($target,$token,$tagstack) = @_;
+    my ($target,$token) = @_;
     my $currentstring = '';
     if ($target eq 'web') {
 	$currentstring = $token->[2];     
     } elsif ($target eq 'tex') {
 	$currentstring = '\end{center}';  
-	if (&is_inside_of($tagstack, "table")) {
-	    $currentstring .= &center_correction();
-	}
     }
     return $currentstring;
 }
@@ -1192,10 +1182,6 @@ sub start_p {
 	if ($align eq 'center') {
 	    $currentstring .='\begin{center}\par';
 	    $closing_string = '\end{center}';
-	    if (&is_inside_of($tagstack, "table")) {
-		$currentstring = &center_correction().$currentstring;
-		$closing_string .= &center_correction();
-	    }
 	} elsif ($align eq 'right') {
 	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
 	    $closing_string= '}}';
@@ -1537,10 +1523,6 @@ sub start_div {
 	if ($align eq 'center') {
 	    $currentstring .= '\begin{center}';
 	    $endstring      = '\end{center}';
-	    if (&is_inside_of($tagstack, "table")) {
-		$currentstring = &center_correction().$currentstring;
-		$endstring .= &center_correction();
-	    }
 	}
 	elsif ($align eq 'right') {
 	    $currentstring .= '\begin{flushright}';
@@ -1961,16 +1943,11 @@ sub start_table {
 
 	# 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 (not defined $TeXwidth) {
+	    $TeXwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
+
 	} else {
 	    $Apache::londefdef::table[-1]{'forcedtablewidth'} = 1;
 	}
@@ -2024,6 +2001,7 @@ sub end_table {
 	my $inmemory = '';
 	my $output = '';
 	my $WARNING='';
+	# &debug_dump_table($Apache::londefdef::table[-1]);
         #width of columns from TeXwidth attributes
 
 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
@@ -2209,17 +2187,34 @@ sub end_table {
 	#fill the table
 	for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
 	    for (my $jn=0;$jn<=$#fwidth;$jn++) {
+		#
+		#  Do the appropriate magic if this has a colspan
+		# 
+		my $colspan = $Apache::londefdef::table[-1]{'colspan'}[$in][$jn];
+		if ($colspan > 1) {
+		    $output .= '\multicolumn{'.
+			$colspan
+			.'}{|l|}{';
+		}
 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
-		    $output.=&center_correction().'\begin{center}';
+		    # $output.='\vspace*{-6 mm}\begin{center}';
+		    $output.='\begin{center}';
 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
 		    $output.=' \hfill \llap{'
 		}
 		$output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
 		if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
-		    $output.='\end{center}'.&center_correction();
+		    # $output.='\end{center}\vspace*{-6 mm}';
+		    $output.='\end{center}';
 		} elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
 		    $output.='} ';
 		}
+		#  Close off the colspan...
+		#
+		if ($colspan > 1)  {
+		    $output .= '}';
+		    $jn += $colspan-1; # Adjust for number of rows really left.
+		}
                 if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
 	    }
 	    $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
@@ -2366,8 +2361,38 @@ sub start_td_tex {
 
 sub end_td_tex {
     my ($parstack,$parser,$safeeval) = @_;
-    my $current_row = $Apache::londefdef::table[-1]{'row_number'};
-    my $data=&Apache::lonxml::endredirection();
+    my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
+    my $current_column = $Apache::londefdef::table[-1]{'counter_columns'}; 
+    my $data = &Apache::lonxml::endredirection();
+
+    #  The rowspan array of the table indicates which cells are part of a span.
+    #  n indicates the start of a span set of n rows.
+    #  ^ indicates a cell that continues a span set.
+    #  If this and subsequent cells are part of a rowspan, we must
+    #  push along the row until we find one that is not.
+
+    while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column]) 
+	   && $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] eq '^') {
+	# Part of a span.
+	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
+	$current_column++;
+    }
+    $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
+   
+
+
+    my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
+    if (!$rowspan) {
+	$rowspan = 1;
+    }
+
+
+
+    $Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] = $rowspan;
+    for (my $i = 1; $i < $rowspan; $i++) {
+	$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column] = '^';
+    }
+
     my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
     if (defined $TeXwidth) {		
 	push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
@@ -2456,7 +2481,34 @@ sub end_td_tex {
 
     }
     # Should be be killing off the 'include' elements as they're used up?
+
     push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
+
+    # Get the column and row spans.
+    # Colspan can be done via \multicolumn if I can figure out the data structs.
+
+    my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
+    if (!$colspan) {
+	$colspan = 1;
+    }
+
+
+    #  the colspan array will indicate how many columns will be spanned by this
+    #  cell..this requires that counter_columns also be adjusted accordingly
+    #  so that the next bunch of text goes in the right cell.  Note that since
+    #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
+    #
+
+    $Apache::londefdef::table[-1]{'colspan'}[$current_row][$current_column] = $colspan;
+    $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
+
+    # Put empty text in spanned cols.
+
+    for (my $i = 0; $i < ($colspan -1); $i++) {
+	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
+    }
+
+
     return '';
 }
 
@@ -2653,8 +2705,7 @@ sub start_img {
 						  $safeeval,
 						  undef,1));
 	if(!$align) {
-	    # disabled for now see BUG#4535
-	    if (0 && &is_inside_of($tagstack, "table")) {
+	    if (&is_inside_of($tagstack, "table")) {
 		$align = "right";      # Force wraptext use. 
 	    } else {
 		$align = "bottom";	# This is html's default so it's ours too.