# HG changeset patch
# User Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
# Date 1598585468 0
#      Fri Aug 28 03:31:08 2020 +0000
# Node ID b8d7683ec05a4646c97c5743bb962edd6e587132
# Parent  fd4337f68e43a67377328911bc855469758da96a
sidebar: use a logarithmic tagcloud scaling

Instead of linearly scaling the tagcloud entries based on their counts, scale
it based on the 2 times the natural log of the count.  This gives more weight
to lower count tags, making the whole cloud looking "denser".

Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>

diff --git a/sidebar.c b/sidebar.c
--- a/sidebar.c
+++ b/sidebar.c
@@ -45,11 +45,10 @@
 	if (count <= cmin)
 		return config.tagcloud_min_size;
 
-	size  = (config.tagcloud_max_size - config.tagcloud_min_size) *
-		(count - cmin);
-	size /= (float) (cmax - cmin);
+	size = 2 * log(count - cmin);
 
-	return ceil(config.tagcloud_min_size + size);
+	return MIN(ceil(config.tagcloud_min_size + size),
+		   config.tagcloud_max_size);
 }
 
 static int __tagcloud_init(void *arg, unsigned long ntags)