1 files changed, 38 insertions, 0 deletions
diff --git a/ui/aura_shell/stacking_controller.h b/ui/aura_shell/stacking_controller.h
new file mode 100644
index 0000000..2091f1f
--- /dev/null
+++ b/ui/aura_shell/stacking_controller.h
@@ -0,0 +1,38 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_AURA_SHELL_STACKING_CONTROLLER_H_
+#define UI_AURA_SHELL_STACKING_CONTROLLER_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "ui/aura/client/stacking_client.h"
+
+namespace aura_shell {
+namespace internal {
+
+class StackingController : public aura::StackingClient {
+ public:
+  StackingController();
+  virtual ~StackingController();
+
+  // Returns true if |window| exists within a container that supports
+  // activation.
+  static aura::Window* GetActivatableWindow(aura::Window* window);
+
+  // Overridden from aura::StackingClient:
+  virtual void AddChildToDefaultParent(aura::Window* window) OVERRIDE;
+  virtual bool CanActivateWindow(aura::Window* window) const OVERRIDE;
+  virtual aura::Window* GetTopmostWindowToActivate(
+      aura::Window* ignore) const OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StackingController);
+};
+
+}  // namespace internal
+}  // namespace aura_shell
+
+#endif  // UI_AURA_SHELL_STACKING_CONTROLLER_H_