From 6176a9b1a9158f16c169759eb79127f94b8e5bcd Mon Sep 17 00:00:00 2001
From: Chris Vaszauskas <chris.vaszauskas@gmail.com>
Date: Thu, 25 Sep 2014 14:46:03 -0500
Subject: [PATCH 1/2] Add index to tooltip name format function

---
 src/tooltip.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tooltip.js b/src/tooltip.js
index 1603993..911eae2 100644
--- a/src/tooltip.js
+++ b/src/tooltip.js
@@ -38,7 +38,7 @@ c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaul
             text = "<table class='" + CLASS.tooltip + "'>" + (title || title === 0 ? "<tr><th colspan='2'>" + title + "</th></tr>" : "");
         }
 
-        name = nameFormat(d[i].name);
+        name = nameFormat(d[i].name, d[i].index);
         value = valueFormat(d[i].value, d[i].ratio, d[i].id, d[i].index);
         bgcolor = $$.levelColor ? $$.levelColor(d[i].value) : color(d[i].id);
 

From 51cac5791913ecf5c7dd43987c27022c80ac2a9f Mon Sep 17 00:00:00 2001
From: Chris Vaszauskas <chris.vaszauskas@gmail.com>
Date: Thu, 25 Sep 2014 14:47:13 -0500
Subject: [PATCH 2/2] Make nameFormat arguments the same as valueFormat

---
 src/tooltip.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tooltip.js b/src/tooltip.js
index 911eae2..b657bbc 100644
--- a/src/tooltip.js
+++ b/src/tooltip.js
@@ -38,7 +38,7 @@ c3_chart_internal_fn.getTooltipContent = function (d, defaultTitleFormat, defaul
             text = "<table class='" + CLASS.tooltip + "'>" + (title || title === 0 ? "<tr><th colspan='2'>" + title + "</th></tr>" : "");
         }
 
-        name = nameFormat(d[i].name, d[i].index);
+        name = nameFormat(d[i].name, d[i].ratio, d[i].id, d[i].index);
         value = valueFormat(d[i].value, d[i].ratio, d[i].id, d[i].index);
         bgcolor = $$.levelColor ? $$.levelColor(d[i].value) : color(d[i].id);