From bee1c045812413969e5e13e1648b880648dfcffd Mon Sep 17 00:00:00 2001
From: Emmanuel Hansen <emmausssss@gmail.com>
Date: Thu, 1 Feb 2024 21:00:10 +0000
Subject: [PATCH] ignore frame extents if window has no decorations (#14441)

---
 src/Avalonia.X11/X11Window.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Avalonia.X11/X11Window.cs b/src/Avalonia.X11/X11Window.cs
index fc15a05e3e..9bcba400f4 100644
--- a/src/Avalonia.X11/X11Window.cs
+++ b/src/Avalonia.X11/X11Window.cs
@@ -593,6 +593,9 @@ namespace Avalonia.X11
 
         private Thickness? GetFrameExtents()
         {
+            if (_systemDecorations != SystemDecorations.Full)
+                return new Thickness(0);
+
             XGetWindowProperty(_x11.Display, _handle, _x11.Atoms._NET_FRAME_EXTENTS, IntPtr.Zero,
                 new IntPtr(4), false, (IntPtr)Atom.AnyPropertyType, out var _,
                 out var _, out var nitems, out var _, out var prop);