From 6a2393299b4366dbba442011a5d9afaf4266b790 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 25 Aug 2022 08:01:40 +0530
Subject: [PATCH] Add a write completed callback

---
 tools/tui/loop.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/tui/loop.go b/tools/tui/loop.go
index 368970fa6..207d1d791 100644
--- a/tools/tui/loop.go
+++ b/tools/tui/loop.go
@@ -83,6 +83,9 @@ type Loop struct {
 
 	// Called when the terminal is resize
 	OnResize func(loop *Loop, old_size ScreenSize, new_size ScreenSize) error
+
+	// Called when writing is done
+	OnWriteComplete func(loop *Loop) error
 }
 
 func (self *Loop) update_screen_size() error {
@@ -370,6 +373,12 @@ func (self *Loop) Run() (err error) {
 			if err != nil {
 				return err
 			}
+			if self.OnWriteComplete != nil && len(self.write_buf) == 0 {
+				err = self.OnWriteComplete(self)
+				if err != nil {
+					return err
+				}
+			}
 		}
 		if selector.IsReadyToRead(tty_fd) {
 			read_buf = read_buf[:cap(read_buf)]