1/*
2 * Copyright (C) 2017 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#pragma once
27
28#include <wtf/Function.h>
29
30#if PLATFORM(IOS_FAMILY)
31#include <wtf/RetainPtr.h>
32OBJC_CLASS WebLowPowerModeObserver;
33#endif
34
35#if USE(GLIB)
36#include <wtf/glib/GRefPtr.h>
37typedef struct _GDBusProxy GDBusProxy;
38#endif
39
40namespace WebCore {
41
42class LowPowerModeNotifier {
43 WTF_MAKE_FAST_ALLOCATED;
44public:
45 using LowPowerModeChangeCallback = WTF::Function<void(bool isLowPowerModeEnabled)>;
46 WEBCORE_EXPORT explicit LowPowerModeNotifier(LowPowerModeChangeCallback&&);
47 WEBCORE_EXPORT ~LowPowerModeNotifier();
48
49 WEBCORE_EXPORT bool isLowPowerModeEnabled() const;
50
51private:
52#if PLATFORM(IOS_FAMILY)
53 void notifyLowPowerModeChanged(bool);
54 friend void notifyLowPowerModeChanged(LowPowerModeNotifier&, bool);
55
56 RetainPtr<WebLowPowerModeObserver> m_observer;
57 LowPowerModeChangeCallback m_callback;
58#elif USE(GLIB)
59 void updateWarningLevel();
60 void warningLevelChanged();
61 static void gPropertiesChangedCallback(LowPowerModeNotifier*, GVariant* changedProperties);
62
63 GRefPtr<GDBusProxy> m_displayDeviceProxy;
64 GRefPtr<GCancellable> m_cancellable;
65 LowPowerModeChangeCallback m_callback;
66 bool m_lowPowerModeEnabled { false };
67#endif
68};
69
70}
71