HidUsageAndPage.cs

using System;

namespace Linearstar.Windows.RawInput;

public readonly struct HidUsageAndPage : IEquatable<HidUsageAndPage>
{
    public static readonly HidUsageAndPage Mouse = new(0x01, 0x02);
    public static readonly HidUsageAndPage Joystick = new(0x01, 0x04);
    public static readonly HidUsageAndPage GamePad = new(0x01, 0x05);
    public static readonly HidUsageAndPage Keyboard = new(0x01, 0x06);
    public static readonly HidUsageAndPage Pen = new(0x0D, 0x02);
    public static readonly HidUsageAndPage TouchScreen = new(0x0D, 0x04);
    public static readonly HidUsageAndPage TouchPad = new(0x0D, 0x05);

    public HidUsageAndPage(ushort usagePage, ushort usage)
    {
        UsagePage = usagePage;
        Usage = usage;
    }

    public ushort Usage
    {
        get;
    }

    public ushort UsagePage
    {
        get;
    }

    public static bool operator ==(HidUsageAndPage a, HidUsageAndPage b) =>
        a.UsagePage == b.UsagePage &&
        a.Usage == b.Usage;

    public static bool operator !=(HidUsageAndPage a, HidUsageAndPage b) =>
        a.UsagePage != b.UsagePage ||
        a.Usage != b.Usage;

    public bool Equals(HidUsageAndPage other) =>
        GetHashCode() == other.GetHashCode();

    public override bool Equals(object obj) =>
        obj is HidUsageAndPage huap ? Equals(huap) : base.Equals(obj);

    public override int GetHashCode() =>
        UsagePage << 16 | Usage;

    public override string ToString() =>
        $"{UsagePage:X2}:{Usage:X2}";
}