添加对 Core 的直接引用

RhythmBaseCore/Components/RDRange.cs

@@ -0,0 +1,92 @@
+using RhythmBase.Exceptions;
+namespace RhythmBase.Components
+{
+	/// <summary>
+	/// Beat range.
+	/// </summary>
+	public struct RDRange
+	{
+		/// <summary>
+		/// Start beat.
+		/// </summary>
+		public RDBeat? Start { get; }
+		/// <summary>
+		/// End beat.
+		/// </summary>
+		public RDBeat? End { get; }
+		/// <summary>
+		/// Beat interval.
+		/// </summary>
+		public readonly float BeatInterval
+		{
+			get
+			{
+				bool flag = Start != null && End != null;
+				float BeatInterval;
+				if (flag)
+				{
+					BeatInterval = End!.Value.BeatOnly - Start!.Value.BeatOnly;
+				}
+				else
+				{
+					BeatInterval = float.PositiveInfinity;
+				}
+				return BeatInterval;
+			}
+		}
+		/// <summary>
+		/// Time interval.
+		/// </summary>
+		/// <returns></returns>
+		public readonly TimeSpan TimeInterval
+		{
+			get
+			{
+				bool flag = Start != null && End != null;
+				TimeSpan TimeInterval;
+				if (flag)
+				{
+					if (Start!.Value.BeatOnly == End!.Value.BeatOnly)
+					{
+						TimeInterval = TimeSpan.Zero;
+					}
+					else
+					{
+						TimeInterval = End.Value.TimeSpan - Start.Value.TimeSpan;
+					}
+				}
+				else
+				{
+					TimeInterval = TimeSpan.MaxValue;
+				}
+				return TimeInterval;
+			}
+		}
+		/// <param name="start">Start beat.</param>
+		/// <param name="end">End beat.</param>
+		public RDRange(RDBeat? start, RDBeat? end)
+		{
+			this = default;
+			if (start != null && end != null && !((RDBeat)start).FromSameLevelOrNull((RDBeat)end))
+			{
+				throw new RhythmBaseException("RDIndexes must come from the same RDLevel.");
+			}
+			if (start != null && end != null && start > end)
+			{
+				Start = end;
+				End = start;
+			}
+			else
+			{
+				Start = start;
+				End = end;
+			}
+		}
+		/// <summary>
+		/// Determines whether the specified beat is within the range.
+		/// </summary>
+		/// <param name="b">The beat to check.</param>
+		/// <returns>True if the beat is within the range; otherwise, false.</returns>
+		public readonly bool Contains(RDBeat b) => (Start == null || Start < b) && (End == null || b < End);
+	}
+}