/*
 * Copyright (C) 2020 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 "HIDElement.h"

#if PLATFORM(MAC)

#include "Logging.h"
#include <IOKit/hid/IOHIDElement.h>
#include <IOKit/hid/IOHIDValue.h>

namespace WebCore {

HIDElement::HIDElement(IOHIDElementRef element)
    : m_physicalMin(IOHIDElementGetPhysicalMin(element))
    , m_physicalMax(IOHIDElementGetPhysicalMax(element))
    , m_physicalValue(m_physicalMin)
    , m_usage(IOHIDElementGetUsage(element))
    , m_usagePage(IOHIDElementGetUsagePage(element))
    , m_cookie(IOHIDElementGetCookie(element))
    , m_rawElement(element)
{
}

void HIDElement::valueChanged(IOHIDValueRef value)
{
    if (IOHIDValueGetElement(value) != m_rawElement.get()) {
        LOG(HID, "HIDElement: Changed value whose IOHIDElement %p doesn't match %p", IOHIDValueGetElement(value), m_rawElement.get());
        return;
    }

    m_physicalValue = IOHIDValueGetScaledValue(value, kIOHIDValueScaleTypePhysical);
}

} // namespace WebCore

#endif // PLATFORM(MAC)