From b3904a305dcb3c3669aff9bd6dae121a8e837322 Mon Sep 17 00:00:00 2001
From: Ayman Bagabas <ayman.bagabas@gmail.com>
Date: Mon, 21 Oct 2024 12:32:34 -0400
Subject: [PATCH] fix: windows: ensure the input buffer is empty

Before initializing the input reader, we need to ensure that
the console input buffer is empty, otherwise, we can get dangling
events from previous sessions.
---
 cancelreader_windows.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/cancelreader_windows.go b/cancelreader_windows.go
index 4aa5a759e0..e55ca79d31 100644
--- a/cancelreader_windows.go
+++ b/cancelreader_windows.go
@@ -10,6 +10,7 @@ import (
 	"sync"
 	"time"
 
+	xwindows "github.com/charmbracelet/x/windows"
 	"github.com/muesli/cancelreader"
 	"golang.org/x/sys/windows"
 )
@@ -47,6 +48,11 @@ func newCancelreader(r io.Reader) (cancelreader.CancelReader, error) {
 		return fallback(r)
 	}
 
+	// Discard any pending input events.
+	if err := xwindows.FlushConsoleInputBuffer(conin); err != nil {
+		return fallback(r)
+	}
+
 	originalMode, err := prepareConsole(conin,
 		windows.ENABLE_MOUSE_INPUT,
 		windows.ENABLE_WINDOW_INPUT,