toc: Add startlevel parameter. (kerravonsen)

1 files changed, 8 insertions, 3 deletions

diff --git a/IkiWiki/Plugin/toc.pm b/IkiWiki/Plugin/toc.pm
index a585564e7..b8537d3eb 100644
--- a/IkiWiki/Plugin/toc.pm
+++ b/IkiWiki/Plugin/toc.pm
@@ -53,8 +53,8 @@ sub format (@) {
 	my $page="";
 	my $index="";
 	my %anchors;
-	my $curlevel;
-	my $startlevel=0;
+	my $startlevel=($params{startlevel} ? $params{startlevel} : 0);
+	my $curlevel=$startlevel-1;
 	my $liststarted=0;
 	my $indent=sub { "\t" x $curlevel };
 	$p->handler(start => sub {
@@ -65,12 +65,17 @@ sub format (@) {
 			my $anchor="index".++$anchors{$level}."h$level";
 			$page.="$text<a name=\"$anchor\"></a>";
 	
-			# Take the first header level seen as the topmost level,
+			# Unless we're given startlevel as a parameter,
+			# take the first header level seen as the topmost level,
 			# even if there are higher levels seen later on.
 			if (! $startlevel) {
 				$startlevel=$level;
 				$curlevel=$startlevel-1;
 			}
+			elsif (defined $params{startlevel} &&
+			       $level < $params{startlevel}) {
+			    return;
+			}
 			elsif ($level < $startlevel) {
 				$level=$startlevel;
 			}