From e7a6d6fbc690b96af757199c98ff1f324f3d75ec Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Mon, 6 Feb 2023 12:00:48 +0100
Subject: [PATCH] Implement windowWillUseStandardFrame
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Seems that `NSWindow.isZoomed` returns the wrong result unless you implement this? ¯\_(ツ)_/¯
---
 native/Avalonia.Native/src/OSX/AvnWindow.mm | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/native/Avalonia.Native/src/OSX/AvnWindow.mm b/native/Avalonia.Native/src/OSX/AvnWindow.mm
index d3b7b4ede6..784072221d 100644
--- a/native/Avalonia.Native/src/OSX/AvnWindow.mm
+++ b/native/Avalonia.Native/src/OSX/AvnWindow.mm
@@ -223,6 +223,19 @@
     }
 }
 
+// From chromium:
+//
+// > The delegate or the window class should implement this method so that
+// > -[NSWindow isZoomed] can be then determined by whether or not the current
+// > window frame is equal to the zoomed frame.
+//
+// If we don't implement this, then isZoomed always returns true for a non-
+// resizable window ¯\_(ツ)_/¯
+- (NSRect)windowWillUseStandardFrame:(NSWindow*)window
+                        defaultFrame:(NSRect)newFrame {
+  return newFrame;
+}
+
 -(BOOL)canBecomeKeyWindow
 {
     if(_canBecomeKeyWindow)