From 2da75c37bd73d9338ac5eef78f02153dcc9b6126 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Fri, 19 May 2017 15:48:27 -0700
Subject: [PATCH] handle surrogate pairs in tooltip cursor_pos

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

diff --git a/notebook/static/notebook/js/tooltip.js b/notebook/static/notebook/js/tooltip.js
index ba93a1d9c..c0d7e11e1 100644
--- a/notebook/static/notebook/js/tooltip.js
+++ b/notebook/static/notebook/js/tooltip.js
@@ -201,8 +201,8 @@ define([
         this.cancel_pending();
         var editor = cell.code_mirror;
         var cursor = editor.getCursor();
-        var cursor_pos = editor.indexFromPos(cursor);
         var text = cell.get_text();
+        var cursor_pos = utils.js_idx_to_char_idx(editor.indexFromPos(cursor), text);
 
         this._hide_if_no_docstring = hide_if_no_docstring;