linkmap: Add option to omit disconnected pages from the map.

1 files changed, 20 insertions, 5 deletions

diff --git a/IkiWiki/Plugin/linkmap.pm b/IkiWiki/Plugin/linkmap.pm
index 9540bd112..28acbda32 100644
--- a/IkiWiki/Plugin/linkmap.pm
+++ b/IkiWiki/Plugin/linkmap.pm
@@ -49,6 +49,7 @@ sub genmap ($) {
 	my $mapnum=shift;
 	return "" unless exists $maps{$mapnum};
 	my %params=%{$maps{$mapnum}};
+	my $connected=IkiWiki::yesno($params{connected});
 
 	# Get all the items to map.
 	my %mapitems = map { $_ => urlto($_, $params{destpage}) }
@@ -79,24 +80,38 @@ sub genmap ($) {
 	print OUT "charset=\"utf-8\";\n";
 	print OUT "ratio=compress;\nsize=\"".($params{width}+0).", ".($params{height}+0)."\";\n"
 		if defined $params{width} and defined $params{height};
+	my %shown;
+	my $show=sub {
+		my $item=shift;
+		if (! $shown{$item}) {
+			print OUT "\"$item\" [shape=box,href=\"$mapitems{$item}\"];\n";
+			$shown{$item}=1;
+		}
+	};
 	foreach my $item (keys %mapitems) {
-		print OUT "\"$item\" [shape=box,href=\"$mapitems{$item}\"];\n";
+		$show->($item) unless $connected;
 		foreach my $link (map { bestlink($item, $_) } @{$links{$item}}) {
-			print OUT "\"$item\" -> \"$link\";\n"
-				if $mapitems{$link};
+			next unless length $link and $mapitems{$link};
+			foreach my $endpoint ($item, $link) {
+				$show->($endpoint);
+			}
+			print OUT "\"$item\" -> \"$link\";\n";
 		}
 	}
 	print OUT "}\n";
-	close OUT;
+	close OUT || error gettext("failed to run dot");
 
 	local $/=undef;
 	my $ret="<object data=\"".urlto($dest, $params{destpage}).
 	       "\" type=\"image/png\" usemap=\"#linkmap$mapnum\">\n".
 	        <IN>.
 	        "</object>";
-	close IN;
+	close IN || error gettext("failed to run dot");
 	
 	waitpid $pid, 0;
+	if ($?) {
+		error gettext("failed to run dot");
+	}
 	$SIG{PIPE}="DEFAULT";
 	error gettext("failed to run dot") if $sigpipe;