X-Git-Url: http://git.shiar.nl/sheet.git/blobdiff_plain/2337f25b4499555c4ad9755c91c2b930172a35e4..4e051d54eec34ed62a4fa8982c2b34493a61e016:/charset.plp

diff --git a/charset.plp b/charset.plp
index 1186585..73b3740 100644
--- a/charset.plp
+++ b/charset.plp
@@ -158,12 +158,14 @@ sub range_cell {
 
 for my $row (@request) {
 	my $colsize = $row->{cell} && $row->{cell}->{colsize} || 1;
+	my $coldigits = ceil(log($colsize * $cols) / log(16));  # uniform length of hexadecimal header
+	my $rowdiv = 16 ** $coldigits;  # divider of row headers
+
 	printf '<div class="section"><table class="glyphs%s">', !$row->{cell} && ' charmap';
 	my $title = $row->{set};
 	$title .= " <aside>($_)</aside>" for $row->{setnote} // ();
 	printf '<caption>%s</caption>', $title;
 	print '<col>' x ($cols + 1);
-	my $coldigits = ceil(log($colsize * $cols) / log(16));  # uniform length of hexadecimal header
 	for my $section (qw{thead}) {
 		print "<$section><tr><th>↱";
 		printf '<th>%0*X', $coldigits, $_ * $colsize for 0 .. $cols - 1;
@@ -171,7 +173,18 @@ for my $row (@request) {
 	}
 	print '<tbody>';
 	for my $msb (0 .. ((length($row->{table}) || 256) - 1) / $cols) {
-		printf '<tr><th>%X', ($msb + int($row->{offset} / $cols)) * $cols * $colsize;
+		print '<tr><th>';
+		{
+			my $rowlabel = ($msb + int($row->{offset} / $cols)) * $cols * $colsize;
+			if (my $rowmod = $rowlabel % $rowdiv) {
+				# offset in column units
+				printf '<small>+%X</small>', $rowmod;
+			}
+			else {
+				# divided row offset
+				printf '%X', $rowlabel / $rowdiv;
+			}
+		}
 		for my $lsb (0 .. $cols - 1) {
 			my $val = ( ($msb * $cols) + $lsb ) * $colsize;
 			if ($row->{cell}) {