[mutter/gnome-3-34] window-actor: Don't show actor until meta_window_actor_show()

[Florian Müllner <fmuellner src gnome org>]

commit 011ff15603d6f1a25e7b4bb79bfc2bcdcef486e5
Author: Jonas Ådahl <jadahl gmail com>
Date:   Tue Feb 18 23:01:28 2020 +0100

    window-actor: Don't show actor until meta_window_actor_show()
    
    By default clutter will show an actor as it is added to a parent. This
    means that after we create the window actor, when it's added to the
    window group, we implicitly show it. What we really want is to not show
    it until the window is supposed to be shown, which happens when
    meta_window_actor_show() is called, as showing prior to that, could
    cause issues.
    
    Avoid the implicit show by setting the "show-on-set-parent" property on
    the window actor to `FALSE` on window actor construction.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1066

 src/compositor/compositor.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/compositor/compositor.c b/src/compositor/compositor.c
index d4b6d14c3..32e1aae1a 100644
--- a/src/compositor/compositor.c
+++ b/src/compositor/compositor.c
@@ -607,6 +607,7 @@ meta_compositor_add_window (MetaCompositor    *compositor,
 
   window_actor = g_object_new (window_actor_type,
                                "meta-window", window,
+                               "show-on-set-parent", FALSE,
                                NULL);
 
   if (window->layer == META_LAYER_OVERRIDE_REDIRECT)