From 1b6d925524f30148ead6c46326a0d47964d120b5 Mon Sep 17 00:00:00 2001
From: chabou <chabup@delean.fr>
Date: Sat, 7 Jan 2017 02:46:54 +0100
Subject: [PATCH] Prevent loosing focus after a char composition ended by Tab
 key. Fix #1341 (#1349)

---
 lib/hterm.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/lib/hterm.js b/lib/hterm.js
index 3d69d05e..287cf398 100644
--- a/lib/hterm.js
+++ b/lib/hterm.js
@@ -182,11 +182,22 @@ hterm.Terminal.prototype.copySelectionToClipboard = function () {
   }
 };
 
+let lastEventTimeStamp;
+let lastEventKey;
 // passthrough all the commands that are meant to control
 // hyper and not the terminal itself
 const oldKeyDown = hterm.Keyboard.prototype.onKeyDown_;
 hterm.Keyboard.prototype.onKeyDown_ = function (e) {
   const modifierKeysConf = this.terminal.modifierKeys;
+  if (e.timeStamp === lastEventTimeStamp && e.key === lastEventKey) {
+    // Event was already processed.
+    // It seems to occur after a char composition ended by Tab and cause a blur.
+    // See https://github.com/zeit/hyper/issues/1341
+    e.preventDefault();
+    return;
+  }
+  lastEventTimeStamp = e.timeStamp;
+  lastEventKey = e.key;
 
   if (e.altKey &&
       e.which !== 16 && // Ignore other modifer keys