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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.
#ifndef UI_AURA_DESKTOP_DESTKOP_ACTIVATION_CLIENT_H_
#define UI_AURA_DESKTOP_DESTKOP_ACTIVATION_CLIENT_H_
#pragma once
#include "base/basictypes.h"
#include "base/observer_list.h"
#include "base/scoped_observer.h"
#include "ui/aura/aura_export.h"
#include "ui/aura/client/activation_client.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/focus_change_observer.h"
#include "ui/aura/root_window_observer.h"
#include "ui/aura/window_observer.h"
namespace aura {
class FocusManager;
namespace client {
class ActivationChangeObserver;
}
// An activation client that handles activation events in a single
// RootWindow. Used only on the Desktop where there can be multiple RootWindow
// objects.
class AURA_EXPORT DesktopActivationClient : public client::ActivationClient,
public WindowObserver,
public EnvObserver,
public FocusChangeObserver {
public:
explicit DesktopActivationClient(FocusManager* focus_manager);
virtual ~DesktopActivationClient();
// ActivationClient:
virtual void AddObserver(client::ActivationChangeObserver* observer) OVERRIDE;
virtual void RemoveObserver(
client::ActivationChangeObserver* observer) OVERRIDE;
virtual void ActivateWindow(Window* window) OVERRIDE;
virtual void DeactivateWindow(Window* window) OVERRIDE;
virtual aura::Window* GetActiveWindow() OVERRIDE;
virtual bool OnWillFocusWindow(Window* window, const Event* event) OVERRIDE;
virtual bool CanActivateWindow(Window* window) const OVERRIDE;
// Overridden from aura::WindowObserver:
virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
// Overridden from aura::EnvObserver:
virtual void OnWindowInitialized(aura::Window* window) OVERRIDE;
// Overridden from aura::FocusChangeObserver:
virtual void OnWindowFocused(aura::Window* window) OVERRIDE;
protected:
// Walks up the chain to find the correct parent window to activate when we
// try to activate |window|.
aura::Window* GetActivatableWindow(aura::Window* window);
// The focus manager that we collaborate with.
FocusManager* focus_manager_;
// The current active window.
Window* current_active_;
// True inside ActivateWindow(). Used to prevent recursion of focus
// change notifications causing activation.
bool updating_activation_;
ObserverList<client::ActivationChangeObserver> observers_;
ScopedObserver<aura::Window, aura::WindowObserver> observer_manager_;
DISALLOW_COPY_AND_ASSIGN(DesktopActivationClient);
};
} // namespace aura
#endif // UI_AURA_DESKTOP_DESTKOP_ACTIVATION_CLIENT_H_
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