[gtk/wip/chergert/fix-macos-compute-size: 2/3] macos: avoid setHasShadow unless shadow changes

[Christian Hergert <chergert src gnome org>]

commit ad617a0e06d40f5295f57e9f5154de7a55924a8e
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jan 1 13:09:57 2021 -0800

    macos: avoid setHasShadow unless shadow changes

 gdk/macos/gdkmacossurface.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 7e0c15dfe2..61e249497e 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -150,6 +150,12 @@ _gdk_macos_surface_set_shadow (GdkMacosSurface *surface,
 
   g_assert (GDK_IS_MACOS_SURFACE (self));
 
+  if (self->shadow_top == top &&
+      self->shadow_right == right &&
+      self->shadow_bottom == bottom &&
+      self->shadow_left == left)
+    return;
+
   self->shadow_top = top;
   self->shadow_right = right;
   self->shadow_bottom = bottom;