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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <WebCore/IntDegrees.h>
#include <wtf/AbstractThreadSafeRefCountedAndCanMakeWeakPtr.h>
#include <wtf/WeakHashSet.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
enum class VideoFrameRotation : uint16_t;
class OrientationNotifier final {
WTF_MAKE_TZONE_ALLOCATED(OrientationNotifier);
public:
explicit OrientationNotifier(IntDegrees orientation)
: m_orientation(orientation)
{
}
~OrientationNotifier() = default;
void orientationChanged(IntDegrees orientation);
void rotationAngleForCaptureDeviceChanged(const String&, VideoFrameRotation);
class Observer : public AbstractThreadSafeRefCountedAndCanMakeWeakPtr {
public:
virtual ~Observer() = default;
virtual void orientationChanged(IntDegrees orientation) = 0;
virtual void rotationAngleForHorizonLevelDisplayChanged(const String&, VideoFrameRotation) { }
};
void addObserver(Observer&);
void removeObserver(Observer&);
IntDegrees orientation() const { return m_orientation; }
private:
ThreadSafeWeakHashSet<Observer> m_observers;
IntDegrees m_orientation;
};
inline void OrientationNotifier::orientationChanged(IntDegrees orientation)
{
m_orientation = orientation;
m_observers.forEach([orientation](auto& observer) {
observer.orientationChanged(orientation);
});
}
inline void OrientationNotifier::rotationAngleForCaptureDeviceChanged(const String& devicePersistentId, VideoFrameRotation orientation)
{
m_observers.forEach([&](auto& observer) {
observer.rotationAngleForHorizonLevelDisplayChanged(devicePersistentId, orientation);
});
}
inline void OrientationNotifier::addObserver(Observer& observer)
{
m_observers.add(observer);
}
inline void OrientationNotifier::removeObserver(Observer& observer)
{
m_observers.remove(observer);
}
} // namespace WebCore
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