From 1683cdfd47bcdac5ebfda2bcf7cf1c977603e6dc Mon Sep 17 00:00:00 2001
From: Gokcehan <gokcehankara@gmail.com>
Date: Wed, 5 Oct 2016 18:26:55 +0300
Subject: [PATCH] check if the directory is empty before nav operations

Mentioned in #23.
---
 nav.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/nav.go b/nav.go
index be944fd..48310d1 100644
--- a/nav.go
+++ b/nav.go
@@ -344,6 +344,10 @@ func (nav *Nav) cd(wd string) error {
 }
 
 func (nav *Nav) toggle() {
+	if nav.currEmpty() {
+		return
+	}
+
 	path := nav.currPath()
 
 	if nav.marks[path] {
@@ -357,6 +361,10 @@ func (nav *Nav) toggle() {
 
 func (nav *Nav) save(keep bool) error {
 	if len(nav.marks) == 0 {
+		if nav.currEmpty() {
+			return errors.New("no file selected")
+		}
+
 		path := nav.currPath()
 
 		if err := saveFiles([]string{path}, keep); err != nil {
@@ -413,6 +421,10 @@ func (nav *Nav) paste() error {
 	return nil
 }
 
+func (nav *Nav) currEmpty() bool {
+	return len(nav.dirs[len(nav.dirs)-1].fi) == 0
+}
+
 func (nav *Nav) currDir() *Dir {
 	return nav.dirs[len(nav.dirs)-1]
 }