From 3d6b0c6dd6476a7a29ca334facef0f04571d71ee Mon Sep 17 00:00:00 2001
From: Zachary Yedidia <zyedidia@gmail.com>
Date: Tue, 16 Aug 2022 22:07:41 -0700
Subject: [PATCH] Ensure screen cannot draw during a term prompt

Fixes #2528
---
 cmd/micro/micro.go        | 2 ++
 internal/screen/screen.go | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/cmd/micro/micro.go b/cmd/micro/micro.go
index e0590244..4af1d295 100644
--- a/cmd/micro/micro.go
+++ b/cmd/micro/micro.go
@@ -388,6 +388,7 @@ func DoEvent() {
 	var event tcell.Event
 
 	// Display everything
+	screen.DrawLock.Lock()
 	screen.Screen.Fill(' ', config.DefStyle)
 	screen.Screen.HideCursor()
 	action.Tabs.Display()
@@ -397,6 +398,7 @@ func DoEvent() {
 	action.MainTab().Display()
 	action.InfoBar.Display()
 	screen.Screen.Show()
+	screen.DrawLock.Unlock()
 
 	// Check for new events
 	select {
diff --git a/internal/screen/screen.go b/internal/screen/screen.go
index 967e8617..0f1cd64b 100644
--- a/internal/screen/screen.go
+++ b/internal/screen/screen.go
@@ -24,6 +24,7 @@ var Events chan (tcell.Event)
 
 // The lock is necessary since the screen is polled on a separate thread
 var lock sync.Mutex
+var DrawLock sync.Mutex
 
 // drawChan is a channel that will cause the screen to redraw when
 // written to even if no event user event has occurred
@@ -120,6 +121,7 @@ func TempFini() bool {
 	if !screenWasNil {
 		Screen.Fini()
 		Lock()
+		DrawLock.Lock()
 		Screen = nil
 	}
 	return screenWasNil
@@ -130,6 +132,7 @@ func TempStart(screenWasNil bool) {
 	if !screenWasNil {
 		Init()
 		Unlock()
+		DrawLock.Unlock()
 	}
 }
 
-- 
2.44.0