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osu-lazer/osu.Game/Beatmaps/Timing/TimeSignature.cs
2022-06-17 16:37:17 +09:00

48 lines
1.5 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
#nullable disable
using System;
namespace osu.Game.Beatmaps.Timing
{
/// <summary>
/// Stores the time signature of a track.
/// For now, the lower numeral can only be 4; support for other denominators can be considered at a later date.
/// </summary>
public class TimeSignature : IEquatable<TimeSignature>
{
/// <summary>
/// The numerator of a signature.
/// </summary>
public int Numerator { get; }
// TODO: support time signatures with a denominator other than 4
// this in particular requires a new beatmap format.
public TimeSignature(int numerator)
{
if (numerator < 1)
throw new ArgumentOutOfRangeException(nameof(numerator), numerator, "The numerator of a time signature must be positive.");
Numerator = numerator;
}
public static TimeSignature SimpleTriple { get; } = new TimeSignature(3);
public static TimeSignature SimpleQuadruple { get; } = new TimeSignature(4);
public override string ToString() => $"{Numerator}/4";
public bool Equals(TimeSignature other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return Numerator == other.Numerator;
}
public override int GetHashCode() => Numerator;
}
}