Source/WebCore/platform/mac/HIDElement.cpp

/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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#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)