charset: compare empty cells, omit unknown unicode

For example cp1255 over iso-8859-8 now distinguishes several inherited
empties from newly emptied.

diff --git a/charset.plp b/charset.plp
index b6b61b9e5df2f22fdb29df82dbcbea25d4c6e61d..5113b4214d9a4578b825dc614ce381553ddefe3c 100644 (file)
--- a/charset.plp
+++ b/charset.plp
@@ -439,28 +439,27 @@ for my $row (@request) {
                                next;
                        }
 
+                       my $cp = $offset + $row->{offset};
                        my $glyph = ref $row->{table} eq 'ARRAY' ? $row->{table}->[$offset] :
                                substr $row->{table}, $offset, 1;
-                       if ($glyph eq $NOCHAR) {
-                               print '<td>';
-                               next;
-                       }
+                       my ($cell, $name, $class) = $glyph eq $NOCHAR ? () :
+                               $glyphs->glyph_html($glyph);
 
                        if (exists $get{compare}) {
                                state $visible = {};
-                               my $cp = $offset + $row->{offset};
-                               printf '<td class="%s" title="%3$s">%2$s',
+                               $class = (
                                        $cp == ord $glyph ? 'l4' :
                                        $row->{parent} && $glyph eq
                                                Encode::decode($row->{parent}, pack 'C', $cp) ? 'l3' :
+                                       !$class ? undef :
                                        $visible->{$glyph} ? 'l2' :
-                                       'l1',
-                                       $glyphs->glyph_html($glyph);
+                                       'l1'
+                               );
                                $visible->{$glyph}++;
-                               next;
                        }
 
-                       say $glyphs->glyph_cell($glyph);
+                       say sprintf $class ? '<td title="%s" class="X %s">%s' : '<td title="%s">',
+                               $name, $class, $cell;
                }
                continue {
                        $offset += $colsize;