1/*
2 * Copyright 2010, The Android Open Source Project
3 * Copyright (C) 2012 Samsung Electronics. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
24 * THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef DeviceController_h
28#define DeviceController_h
29
30#include "DOMWindow.h"
31#include "Event.h"
32#include "Supplementable.h"
33#include "Timer.h"
34#include <wtf/HashCountedSet.h>
35
36namespace WebCore {
37
38class DeviceClient;
39class Page;
40
41class DeviceController : public Supplement<Page> {
42public:
43    explicit DeviceController(DeviceClient*);
44    ~DeviceController() { }
45
46    void addDeviceEventListener(DOMWindow*);
47    void removeDeviceEventListener(DOMWindow*);
48    void removeAllDeviceEventListeners(DOMWindow*);
49
50    void dispatchDeviceEvent(PassRefPtr<Event>);
51    bool isActive() { return !m_listeners.isEmpty(); }
52    DeviceClient* client() { return m_client; }
53
54    virtual bool hasLastData() { return false; }
55    virtual PassRefPtr<Event> getLastEvent() { return 0; }
56
57protected:
58    void fireDeviceEvent(Timer<DeviceController>*);
59
60    HashCountedSet<RefPtr<DOMWindow> > m_listeners;
61    HashCountedSet<RefPtr<DOMWindow> > m_lastEventListeners;
62    DeviceClient* m_client;
63    Timer<DeviceController> m_timer;
64};
65
66} // namespace WebCore
67
68#endif // DeviceController_h
69