From cfcd30edcd80b9be575423b56c5f52d45013a901 Mon Sep 17 00:00:00 2001
From: mattn <mattn.jp@gmail.com>
Date: Wed, 25 Jun 2014 09:50:30 +0900
Subject: [PATCH] Don't handle ModAlt if no M-XXX mappings

---
 input.go  | 5 +++--
 keymap.go | 4 ++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/input.go b/input.go
index c5d4aa6..e80b7ba 100644
--- a/input.go
+++ b/input.go
@@ -31,6 +31,7 @@ func (i *Input) Loop() {
 		}
 	}()
 
+	hasModifierMaps := i.config.Keymap.hasModifierMaps()
 	var mod *time.Timer
 	for {
 		select {
@@ -50,10 +51,10 @@ func (i *Input) Loop() {
 
 				// Smells like Esc or Alt. mod == nil checks for the presense
 				// of a previous timer
-				if ev.Ch == 0 && ev.Key == 27 && mod == nil {
+				if hasModifierMaps && ev.Ch == 0 && ev.Key == 27 && mod == nil {
 					tmp := ev
 					i.mutex.Lock()
-					mod = time.AfterFunc(200*time.Millisecond, func() {
+					mod = time.AfterFunc(50*time.Millisecond, func() {
 						i.mutex.Lock()
 						mod = nil
 						i.mutex.Unlock()
diff --git a/keymap.go b/keymap.go
index faa65b9..7b68bfe 100644
--- a/keymap.go
+++ b/keymap.go
@@ -579,3 +579,7 @@ func (km Keymap) UnmarshalJSON(buf []byte) error {
 
 	return nil
 }
+
+func (km Keymap) hasModifierMaps() bool {
+	return len(km[ModAlt]) > 0
+}