From 8b0c930c2dbc538c64be2871ab924a28ac179eea Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sat, 28 Sep 2024 02:51:37 +0900
Subject: [PATCH] internal/ui: bug fix: an undecorated window should reach the
 top of the screen

Closes #3118
---
 internal/ui/ui_windows.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/internal/ui/ui_windows.go b/internal/ui/ui_windows.go
index 6eda1b921..93249abbf 100644
--- a/internal/ui/ui_windows.go
+++ b/internal/ui/ui_windows.go
@@ -115,6 +115,15 @@ func (u *UserInterface) adjustWindowPosition(x, y int, monitor *Monitor) (int, i
 		return x, y, nil
 	}
 
+	// If a window is not decorated, the window should be able to reach the top of the screen (#3118).
+	d, err := u.window.GetAttrib(glfw.Decorated)
+	if err != nil {
+		return 0, 0, err
+	}
+	if d == glfw.False {
+		return x, y, nil
+	}
+
 	mx := monitor.boundsInGLFWPixels.Min.X
 	my := monitor.boundsInGLFWPixels.Min.Y
 	// As the video width/height might be wrong,