From aa7e1e46f8a85abff6461412ec77513fa4c0061d Mon Sep 17 00:00:00 2001
From: eeeXun <sdes96303@gmail.com>
Date: Sat, 22 Oct 2022 01:50:59 +0800
Subject: [PATCH] fix swap, if box do not have words, no need to cut last char

---
 ui.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/ui.go b/ui.go
index ecee221..2344746 100644
--- a/ui.go
+++ b/ui.go
@@ -125,7 +125,12 @@ func TranslatePageHandler(event *tcell.EventKey) *tcell.EventKey {
 		updateTitle()
 		src_text := src_box.GetText()
 		dst_text := dst_box.GetText(false)
-		src_box.SetText(dst_text[:len(dst_text)-1], true)
+		if len(dst_text) > 0 {
+			// GetText of Box contains "\n" if it has words
+			src_box.SetText(dst_text[:len(dst_text)-1], true)
+		} else {
+			src_box.SetText(dst_text, true)
+		}
 		dst_box.SetText(src_text)
 	}