From 9387f3895347ea4dfb783d213739f336948c8178 Mon Sep 17 00:00:00 2001
From: Nathan Reese <reese.nathan@gmail.com>
Date: Wed, 11 Oct 2017 08:39:44 -0600
Subject: [PATCH] update tooltip position logic to avoid tooltip getting
 clipped by top of browser window

---
 src/ui/public/vis/components/tooltip/position_tooltip.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/ui/public/vis/components/tooltip/position_tooltip.js b/src/ui/public/vis/components/tooltip/position_tooltip.js
index 7e1747a409b8a36..463f56bb67e40bc 100644
--- a/src/ui/public/vis/components/tooltip/position_tooltip.js
+++ b/src/ui/public/vis/components/tooltip/position_tooltip.js
@@ -103,6 +103,13 @@ function mergeOverflows(dest, src) {
       dest.west = src.west;
     }
   }
+  if (dest.north && dest.south && dest.north > 0 && dest.south > 0 && (src.north < 0 || src.south < 0)) {
+    if (src.north < src.south) {
+      dest.north = src.north;
+    } else {
+      dest.south = src.south;
+    }
+  }
 }
 
 function pickPlacement(prop, pos, overflow, prev, pref, fallback, placement) {