From 4f06ff0aef7159e9fc59e0af1d33f9a4665e59d2 Mon Sep 17 00:00:00 2001
From: Ayman Bagabas <ayman.bagabas@gmail.com>
Date: Thu, 16 May 2024 15:47:52 -0400
Subject: [PATCH] fix(input): multiple window-size-events

---
 input/driver.go         |  4 ++++
 input/driver_windows.go | 13 ++++++++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/input/driver.go b/input/driver.go
index 8339f1fb..7043c31e 100644
--- a/input/driver.go
+++ b/input/driver.go
@@ -28,6 +28,10 @@ type Driver struct {
 	// up button events.
 	prevMouseState coninput.ButtonState // nolint: unused
 
+	// lastWinsizeEvent keeps track of the last window size event to prevent
+	// multiple size events from firing.
+	lastWinsizeEvent coninput.WindowBufferSizeEventRecord // nolint: unused
+
 	flags int // control the behavior of the driver.
 }
 
diff --git a/input/driver_windows.go b/input/driver_windows.go
index 0b3f40ea..05e18f24 100644
--- a/input/driver_windows.go
+++ b/input/driver_windows.go
@@ -45,7 +45,7 @@ func (d *Driver) handleConInput(
 
 	var evs []Event
 	for _, event := range events {
-		if e := parseConInputEvent(event, &d.prevMouseState); e != nil {
+		if e := parseConInputEvent(event, &d.prevMouseState, &d.lastWinsizeEvent); e != nil {
 			evs = append(evs, e)
 		}
 	}
@@ -107,7 +107,7 @@ loop:
 	return events
 }
 
-func parseConInputEvent(event coninput.InputRecord, ps *coninput.ButtonState) Event {
+func parseConInputEvent(event coninput.InputRecord, ps *coninput.ButtonState, ws *coninput.WindowBufferSizeEventRecord) Event {
 	switch e := event.Unwrap().(type) {
 	case coninput.KeyEventRecord:
 		event := parseWin32InputKeyEvent(e.VirtualKeyCode, e.VirtualScanCode,
@@ -177,9 +177,12 @@ func parseConInputEvent(event coninput.InputRecord, ps *coninput.ButtonState) Ev
 		return KeyUpEvent(key)
 
 	case coninput.WindowBufferSizeEventRecord:
-		return WindowSizeEvent{
-			Width:  int(e.Size.X),
-			Height: int(e.Size.Y),
+		if e != *ws {
+			*ws = e
+			return WindowSizeEvent{
+				Width:  int(e.Size.X),
+				Height: int(e.Size.Y),
+			}
 		}
 	case coninput.MouseEventRecord:
 		mevent := mouseEvent(*ps, e)