[mutter] window: Fix delayed mouse mode

[Florian Müllner <fmuellner src gnome org>]

commit f159611fabc6205c691d33b4fd035750e3dc836e
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed May 21 19:50:26 2014 +0200

    window: Fix delayed mouse mode
    
    Using clutter_actor_has_pointer() to test whether the pointer is
    on the window makes for clean and nice-looking code, but does not
    work in practice - ClutterActor:has-pointer is not recursive, so
    we miss when the pointer is on the associated surface actor rather
    than the actor itself.
    Instead, check whether the window actor contains the core pointer's
    pointer actor, which actually works.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=730541

 src/core/window.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 54e3e4a..9bbfbce 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -7701,8 +7701,16 @@ mouse_mode_focus (MetaWindow  *window,
 static gboolean
 window_has_pointer (MetaWindow *window)
 {
-  ClutterActor *actor = CLUTTER_ACTOR (meta_window_get_compositor_private (window));
-  return clutter_actor_has_pointer (actor);
+  ClutterDeviceManager *dm;
+  ClutterInputDevice *dev;
+  ClutterActor *pointer_actor, *window_actor;
+
+  dm = clutter_device_manager_get_default ();
+  dev = clutter_device_manager_get_core_device (dm, CLUTTER_POINTER_DEVICE);
+  pointer_actor = clutter_input_device_get_pointer_actor (dev);
+  window_actor = CLUTTER_ACTOR (meta_window_get_compositor_private (window));
+
+  return pointer_actor && clutter_actor_contains (window_actor, pointer_actor);
 }
 
 static gboolean