From 36e1441fd2e594b24504b85e214b19616d9f1d4f Mon Sep 17 00:00:00 2001
From: Mischa POSLAWSKY <perl@shiar.org>
Date: Tue, 9 Nov 2010 23:41:23 +0100
Subject: [PATCH] browser: combine versions with same support

---
 browser.plp | 39 +++++++++++++++++++++++++++++++++------
 1 file changed, 33 insertions(+), 6 deletions(-)

diff --git a/browser.plp b/browser.plp
index a3068f5..49c3ec2 100644
--- a/browser.plp
+++ b/browser.plp
@@ -58,17 +58,26 @@ my %CSTATUS = (
 	ietf  => 'di-a', # standard
 );
 my @browsers = qw(trident gecko webkit_saf presto);
-unshift @{ $caniuse->{agents}->{gecko}->{versions} }, 2;
+my %versions;
+if (my ($somerow) = values %{ $caniuse->{data} }) {
+	while (my ($browser, $row) = each %{ $somerow->{stats} }) {
+		$versions{$browser} = [ sort { paddedver($a) cmp paddedver($b) } keys %$row ];
+	}
+}
 
 print '<table class="glyphs dimap">';
 print '<col>' x 2;
-printf '<colgroup span="%d">', scalar @{ $caniuse->{agents}->{$_}->{versions} } for @browsers;
+printf '<colgroup span="%d">', scalar @{ $versions{$_} } for @browsers;
 print "\n";
 
 print '<thead><tr>';
 print "<th>$_" for qw(feature status);
-printf '<th colspan="%d">%s', scalar @{ $_->{versions} }, $_->{browser}
-	for map { $caniuse->{agents}->{$_} } @browsers;
+printf '<th colspan="%d">%s',
+	scalar @{ $versions{$_} }, $caniuse->{agents}->{$_}->{browser}
+		for @browsers;
+# preceding row without any colspan to work around gecko bug
+print '<tr>';
+print '<td>' x $_ for 2, map { scalar @{ $versions{$_} } } @browsers;
 print "</thead>\n";
 
 for my $id (keys %{ $caniuse->{data} }) {
@@ -78,12 +87,30 @@ for my $id (keys %{ $caniuse->{data} }) {
 	printf '<th title="%s">%s', $row->{description}, $row->{title};
 	printf '<td title="%s" class="%s">%s', $caniuse->{statuses}->{$_}, $CSTATUS{$_} // '', $_ for $row->{status};
 	for my $browser (@browsers) {
-		printf '<td class="%s">%s', $CSTATS{ $data->{$browser}->{$_} }, $_
-			for @{ $caniuse->{agents}->{$browser}->{versions} };
+		my ($prev, @span);
+		for my $ver (@{ $versions{$browser} }, undef) {
+			unless (!defined $prev
+			or $data->{$browser}->{$prev} ~~ $data->{$browser}->{$ver}) {
+				printf '<td class="%s" colspan="%d">%s',
+					$CSTATS{ $data->{$browser}->{$prev} },
+					scalar @span,
+					join('‒', $span[0], @span > 1 ? $span[-1] : ());
+				undef $prev;
+				@span = ();
+			}
+			push @span, $ver;
+			$prev = $ver;
+		}
 	}
 }
 print '</table>';
 
+sub paddedver {
+	# normalised version number comparable as string (cmp)
+	shift =~ /^(\d*)(.*)/;
+	return sprintf('%02d', $1) . $2;
+}
+
 :>
 <hr>
 
-- 
2.30.0