109 lines
4.1 KiB
C++
109 lines
4.1 KiB
C++
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "HIDDevice.h"
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#if PLATFORM(MAC)
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#include "HIDElement.h"
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#include "Logging.h"
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#include <IOKit/hid/IOHIDElement.h>
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#include <wtf/Deque.h>
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#include <wtf/HashSet.h>
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#include <wtf/cf/TypeCastsCF.h>
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WTF_DECLARE_CF_TYPE_TRAIT(IOHIDElement);
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namespace WebCore {
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HIDDevice::HIDDevice(IOHIDDeviceRef device)
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: m_rawDevice(device)
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{
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CFNumberRef cfVendorID = checked_cf_cast<CFNumberRef>(IOHIDDeviceGetProperty(device, CFSTR(kIOHIDVendorIDKey)));
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CFNumberRef cfProductID = checked_cf_cast<CFNumberRef>(IOHIDDeviceGetProperty(device, CFSTR(kIOHIDProductIDKey)));
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int vendorID, productID;
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CFNumberGetValue(cfVendorID, kCFNumberIntType, &vendorID);
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CFNumberGetValue(cfProductID, kCFNumberIntType, &productID);
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if (vendorID < 0 || vendorID > std::numeric_limits<uint16_t>::max()) {
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LOG(HID, "Device attached with malformed vendor ID 0x%x. Resetting to 0.", vendorID);
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vendorID = 0;
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}
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if (productID < 0 || productID > std::numeric_limits<uint16_t>::max()) {
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LOG(HID, "Device attached with malformed product ID 0x%x. Resetting to 0.", productID);
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productID = 0;
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}
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m_vendorID = (uint16_t)vendorID;
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m_productID = (uint16_t)productID;
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CFStringRef cfProductName = checked_cf_cast<CFStringRef>(IOHIDDeviceGetProperty(device, CFSTR(kIOHIDProductKey)));
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m_productName = cfProductName ? String(cfProductName) : String("Unknown"_s);
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}
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Vector<HIDElement> HIDDevice::uniqueInputElementsInDeviceTreeOrder() const
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{
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HashSet<IOHIDElementCookie> encounteredCookies;
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Deque<IOHIDElementRef> elementQueue;
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RetainPtr<CFArrayRef> elements = adoptCF(IOHIDDeviceCopyMatchingElements(m_rawDevice.get(), NULL, kIOHIDOptionsTypeNone));
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for (CFIndex i = 0; i < CFArrayGetCount(elements.get()); ++i)
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elementQueue.append(checked_cf_cast<IOHIDElementRef>(CFArrayGetValueAtIndex(elements.get(), i)));
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Vector<HIDElement> result;
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while (!elementQueue.isEmpty()) {
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auto element = elementQueue.takeFirst();
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IOHIDElementCookie cookie = IOHIDElementGetCookie(element);
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if (encounteredCookies.contains(cookie))
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continue;
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switch (IOHIDElementGetType(element)) {
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case kIOHIDElementTypeCollection: {
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auto children = IOHIDElementGetChildren(element);
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for (CFIndex i = CFArrayGetCount(children) - 1; i >= 0; --i)
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elementQueue.prepend(checked_cf_cast<IOHIDElementRef>(CFArrayGetValueAtIndex(children, i)));
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continue;
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}
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case kIOHIDElementTypeInput_Misc:
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case kIOHIDElementTypeInput_Button:
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case kIOHIDElementTypeInput_Axis:
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encounteredCookies.add(cookie);
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result.append(element);
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continue;
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default:
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continue;
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}
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}
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return result;
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}
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} // namespace WebCore
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#endif // PLATFORM(MAC)
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