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// Copyright (c) 2012 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.
#include "ui/aura/aura_export.h"
#include "ui/aura/window.h"
namespace aura {
namespace client {
class FocusChangeObserver;
// An interface implemented by an object that manages window focus.
class AURA_EXPORT FocusClient {
virtual ~FocusClient() {}
virtual void AddObserver(FocusChangeObserver* observer) = 0;
virtual void RemoveObserver(FocusChangeObserver* observer) = 0;
// Focuses |window|. Passing NULL clears focus.
virtual void FocusWindow(Window* window) = 0;
// Sets focus to |window| if it's within the active window. Not intended as a
// general purpose API, use FocusWindow() instead.
virtual void ResetFocusWithinActiveWindow(Window* window) = 0;
// Retrieves the focused window, or NULL if there is none.
virtual Window* GetFocusedWindow() = 0;
// Sets/Gets the focus client on the root Window.
AURA_EXPORT void SetFocusClient(Window* root_window, FocusClient* client);
AURA_EXPORT FocusClient* GetFocusClient(Window* window);
AURA_EXPORT FocusClient* GetFocusClient(const Window* window);
} // namespace clients
} // namespace aura