From cc1bf97e24129db2b8c4634bc733ae0a16b2beba Mon Sep 17 00:00:00 2001
From: Luben Tuikov <ltuikov@yahoo.com>
Date: Sun, 23 Jul 2006 13:37:53 -0700
Subject: [PATCH] gitweb.cgi: git_blame2: Revision blocks now have alternating
 colors

A revision block is the largest number of adjacent
lines of code originating from the same revision.

This patch adds color to git_blame2(), in that no two
adjacent revision blocks have the same color.  The color
alternates between light and dark.

As we annotate the code lines, we alternate the color
(light, dark) of code lines _per revision_.  This makes it
easier to see line conglomerations per revision.

Signed-off-by: Luben Tuikov <ltuikov@yahoo.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 gitweb/gitweb.cgi | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/gitweb/gitweb.cgi b/gitweb/gitweb.cgi
index 2c2d9c8d8f..16340f2106 100755
--- a/gitweb/gitweb.cgi
+++ b/gitweb/gitweb.cgi
@@ -1295,9 +1295,11 @@ sub git_blame2 {
 		$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$hash_base"), -class => "title"}, esc_html($co{'title'})) .
 		"</div>\n";
 	git_print_page_path($file_name, $ftype);
-
+	my @rev_color = (qw(light dark));
+	my $num_colors = scalar(@rev_color);
+	my $current_color = 0;
+	my $last_rev;
 	print "<div class=\"page_body\">\n";
-
 	print "<table class=\"blame\">\n";
 	print "<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n";
 	while (my $line = <$fd>) {
@@ -1307,7 +1309,13 @@ sub git_blame2 {
 		my $lineno = $blame_line{'lineno'};
 		my $data = $blame_line{'data'};
 
-		print "<tr>\n";
+		if (!defined $last_rev) {
+			$last_rev = $full_rev;
+		} elsif ($last_rev ne $full_rev) {
+			$last_rev = $full_rev;
+			$current_color = ++$current_color % $num_colors;
+		}
+		print "<tr class=\"$rev_color[$current_color]\">\n";
 		print "<td class=\"sha1\">" .
 			$cgi->a({-href => "$my_uri?" . esc_param("p=$project;a=commit;h=$full_rev;f=$file_name")}, esc_html($rev)) . "</td>\n";
 		print "<td class=\"linenr\"><a id=\"l$lineno\" href=\"#l$lineno\" class=\"linenr\">" . esc_html($lineno) . "</a></td>\n";
@@ -1316,7 +1324,6 @@ sub git_blame2 {
 	}
 	print "</table>\n";
 	print "</div>";
-
 	close $fd or print "Reading blob failed\n";
 	git_footer_html();
 }