36 lines
942 B
C#
36 lines
942 B
C#
using System.Collections.Generic;
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using Gallium;
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namespace Nitride.Entities;
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/// <summary>
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/// Defines a relationship between a given entity and the others in a sequence.
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/// </summary>
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public class EntitySequence
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{
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public EntitySequence(
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IReadOnlyList<Entity> sequence,
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int index)
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{
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this.Sequence = sequence;
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this.Index = index;
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}
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public bool HasNext => this.Sequence.Count > 0 && !this.IsLast;
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public bool HasPrevious => this.Sequence.Count > 0 && !this.IsFirst;
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public int Index { get; }
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public bool IsFirst => this.Sequence.Count > 0 && this.Index == 0;
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public bool IsLast => this.Sequence.Count > 0 && this.Index == this.Sequence.Count - 1;
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public Entity? Next => this.HasNext ? this.Sequence[this.Index + 1] : null;
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public Entity? Previous => this.HasPrevious ? this.Sequence[this.Index - 1] : null;
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public IReadOnlyList<Entity> Sequence { get; }
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}
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