1/*
2 * Copyright (C) 2014 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef GamepadManager_h
27#define GamepadManager_h
28
29#if ENABLE(GAMEPAD)
30
31#include "GamepadProviderClient.h"
32#include <wtf/HashSet.h>
33#include <wtf/NeverDestroyed.h>
34#include <wtf/RefPtr.h>
35#include <wtf/text/AtomicString.h>
36
37namespace WebCore {
38
39class DOMWindow;
40class Gamepad;
41class NavigatorGamepad;
42
43class GamepadManager : public GamepadProviderClient {
44    WTF_MAKE_NONCOPYABLE(GamepadManager);
45    friend class NeverDestroyed<GamepadManager>;
46public:
47    static GamepadManager& shared();
48
49    virtual void platformGamepadConnected(PlatformGamepad&) override final;
50    virtual void platformGamepadDisconnected(PlatformGamepad&) override final;
51    virtual void platformGamepadInputActivity() override final;
52
53    void registerNavigator(NavigatorGamepad*);
54    void unregisterNavigator(NavigatorGamepad*);
55    void registerDOMWindow(DOMWindow*);
56    void unregisterDOMWindow(DOMWindow*);
57
58private:
59    GamepadManager();
60
61    void makeGamepadVisible(PlatformGamepad&, HashSet<NavigatorGamepad*>&, HashSet<DOMWindow*>&);
62    void dispatchGamepadEvent(const WTF::AtomicString& eventName, PlatformGamepad&);
63
64    void maybeStartMonitoringGamepads();
65    void maybeStopMonitoringGamepads();
66
67    bool m_isMonitoringGamepads;
68
69    HashSet<NavigatorGamepad*> m_navigators;
70    HashSet<NavigatorGamepad*> m_gamepadBlindNavigators;
71    HashSet<DOMWindow*> m_domWindows;
72    HashSet<DOMWindow*> m_gamepadBlindDOMWindows;
73};
74
75} // namespace WebCore
76
77#endif // ENABLE(GAMEPAD)
78#endif // GamepadManager_h
79