RawInputHidData.cs

using System.Linq;
using Linearstar.Windows.RawInput.Native;

namespace Linearstar.Windows.RawInput;

public class RawInputHidData : RawInputData
{
    public new RawInputHid? Device => (RawInputHid?)base.Device;

    public RawHid Hid { get; }

    public HidButtonSetState[] ButtonSetStates =>
        Device != null
            ? Hid.ToHidReports().SelectMany(report => Device?.Reader.ButtonSets.Select(x => x.GetStates(report))).ToArray()
            : new HidButtonSetState[0];

    public HidValueSetState[] ValueSetStates =>
        Device != null
            ? Hid.ToHidReports().SelectMany(report => Device?.Reader.ValueSets.Select(x => x.GetStates(report))).ToArray()
            : new HidValueSetState[0];

    protected RawInputHidData(RawInputHeader header, RawHid hid)
        : base(header) =>
        Hid = hid;

    public static RawInputHidData Create(RawInputHeader header, RawHid hid)
    {
        var device = header.DeviceHandle != RawInputDeviceHandle.Zero ? RawInputDevice.FromHandle(header.DeviceHandle) : null;

        if (device != null && RawInputDigitizer.IsSupported(device.UsageAndPage))
            return new RawInputDigitizerData(header, hid);

        return new RawInputHidData(header, hid);
    }

    public override unsafe byte[] ToStructure()
    {
        var headerSize = MarshalEx.SizeOf<RawInputHeader>();
        var hid = Hid.ToStructure();
        var bytes = new byte[Align(headerSize + hid.Length)];

        fixed (byte* bytesPtr = bytes)
            *(RawInputHeader*) bytesPtr = Header;
            
        hid.CopyTo(bytes, headerSize);

        return bytes;
    }

    public override string ToString() =>
        $"{{{Header}, {Hid}}}";
}