From: Mischa POSLAWSKY <perl@shiar.org>
Date: Sat, 8 Apr 2017 01:14:32 +0000 (+0200)
Subject: charset: improve visibility determination
X-Git-Tag: v1.10~219
X-Git-Url: http://git.shiar.nl/sheet.git/commitdiff_plain/c253269d0792b66849eae1ba12ab02c43d649496

charset: improve visibility determination
---

diff --git a/charset.plp b/charset.plp
index 9d7375d..9ee6d86 100644
--- a/charset.plp
+++ b/charset.plp
@@ -137,21 +137,19 @@ sub tabinput {
 
 		my @parents = @{ $INHERIT->{$input} || [] };
 
-		if (my ($parent, $part) = pairfirst { exists $visible->{$a} } @parents) {
+		if (my ($parent, $part) = pairfirst { defined $visible->{$a} } @parents) {
 			$row{parent} = $parent;
-			$params = $part;
-			$_ eq $part or $params = 128 for $visible->{$parent} // ();
+			$params = $visible->{$parent} ? $part : 128;
 		}
-		elsif (exists $visible->{ascii}) {
-			$row{parent} = $parents[0];
+		elsif (defined $visible->{ascii}) {
+			$row{parent} = $parents[0] || 'ascii';
 			$params = $parents[1] || 128;
-			exists $visible->{$_} or $visible->{$_} = $params for $row{parent};
 			$params = 128 if $params >= 128;  # ascii offset at most
 		}
 		elsif (@parents) {
 			$row{parent} = $parents[0];
 		}
-			exists $visible->{$_} or $visible->{$_} = $params // 0 for $row{parent};
+		$visible->{$_} //= 0 for $row{parent};
 	}
 
 	if (defined $params and $params =~ m/^ (\d+) (-\d+)? /x) {
@@ -212,7 +210,7 @@ sub tabinput {
 			}
 
 			$visible->{ascii} =  # assume common base
-			$visible->{ $row{set} } = undef;
+			$visible->{ $row{set} } = 1;
 		}
 	}
 	else {