[gtk/wip/chergert/gdk-macos-for-master] macos: resign main/key when hiding window

[Christian Hergert <chergert src gnome org>]

commit b38d0d7d9e4343aff03754b4ef1e86b2d3cc831a
Author: Christian Hergert <chergert redhat com>
Date:   Wed Dec 2 11:35:22 2020 -0800

    macos: resign main/key when hiding window
    
    This isn't done automatically for us, so we need to synthesize it in
    our hide helper.
    
    With this commit, we properly re-focus the new main/key window after
    we have closed a transient-for window.

 gdk/macos/GdkMacosWindow.c | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/gdk/macos/GdkMacosWindow.c b/gdk/macos/GdkMacosWindow.c
index 92cfa622eb..46a97adcfc 100644
--- a/gdk/macos/GdkMacosWindow.c
+++ b/gdk/macos/GdkMacosWindow.c
@@ -320,11 +320,20 @@
 
 -(void)hide
 {
+  BOOL wasKey = [self isKeyWindow];
+  BOOL wasMain = [self isMainWindow];
+
   inShowOrHide = YES;
   [self orderOut:nil];
   inShowOrHide = NO;
 
   initialPositionKnown = NO;
+
+  if (wasMain)
+    [self windowDidResignMain:nil];
+
+  if (wasKey)
+    [self windowDidResignKey:nil];
 }
 
 -(BOOL)trackManualMove