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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_ENV_H_
#define UI_AURA_ENV_H_
#pragma once
#include "base/observer_list.h"
#include "ui/aura/aura_export.h"
namespace aura {
class EnvObserver;
class Window;
// A singleton object that tracks general state within Aura.
// TODO(beng): manage RootWindows.
class AURA_EXPORT Env {
public:
Env();
~Env();
static Env* GetInstance();
static void DeleteInstance();
void AddObserver(EnvObserver* observer);
void RemoveObserver(EnvObserver* observer);
private:
friend class Window;
// Called by the Window when it is initialized. Notifies observers.
void NotifyWindowInitialized(Window* window);
ObserverList<EnvObserver> observers_;
static Env* instance_;
DISALLOW_COPY_AND_ASSIGN(Env);
};
} // namespace aura
#endif // UI_AURA_ENV_H_
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