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/*
* Copyright (C) 2019 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.
*/
#include "config.h"
#include "VelocityData.h"
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/TextStream.h>
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(HistoricalVelocityData);
VelocityData HistoricalVelocityData::velocityForNewData(FloatPoint newPosition, double scale, MonotonicTime timestamp)
{
VelocityData velocityData;
if (m_positionHistory.size() > 0) {
Seconds timeDelta = timestamp - m_positionHistory.first().timestamp;
Data& oldestData = m_positionHistory.first();
velocityData = VelocityData((newPosition.x() - oldestData.position.x()) / timeDelta.seconds(), (newPosition.y() - oldestData.position.y()) / timeDelta.seconds(), (scale - oldestData.scale) / timeDelta.seconds(), timestamp);
}
if (m_positionHistory.size() == maxHistoryDepth)
m_positionHistory.removeFirst();
m_positionHistory.append({ timestamp, newPosition, scale });
return velocityData;
}
TextStream& operator<<(TextStream& ts, const VelocityData& velocityData)
{
ts.dumpProperty("timestamp"_s, velocityData.lastUpdateTime.secondsSinceEpoch().value());
if (velocityData.horizontalVelocity)
ts.dumpProperty("horizontalVelocity"_s, velocityData.horizontalVelocity);
if (velocityData.verticalVelocity)
ts.dumpProperty("verticalVelocity"_s, velocityData.verticalVelocity);
if (velocityData.scaleChangeRate)
ts.dumpProperty("scaleChangeRate"_s, velocityData.scaleChangeRate);
return ts;
}
} // namespace WebCore
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