From f406999cba69a77617ca7bcb5362a8238d258805 Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Thu, 6 Oct 2022 12:38:15 +0200
Subject: [PATCH] fix: don't try to set alt screen when already in desired mode

---
 standard_renderer.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/standard_renderer.go b/standard_renderer.go
index 14edb3c..195ef59 100644
--- a/standard_renderer.go
+++ b/standard_renderer.go
@@ -260,6 +260,10 @@ func (r *standardRenderer) altScreen() bool {
 }
 
 func (r *standardRenderer) enterAltScreen() {
+	if r.altScreenActive {
+		return
+	}
+
 	r.mtx.Lock()
 	defer r.mtx.Unlock()
 
@@ -279,6 +283,10 @@ func (r *standardRenderer) enterAltScreen() {
 }
 
 func (r *standardRenderer) exitAltScreen() {
+	if !r.altScreenActive {
+		return
+	}
+
 	r.mtx.Lock()
 	defer r.mtx.Unlock()