83 lines
1.8 KiB
C#
83 lines
1.8 KiB
C#
using System;
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using System.Collections.Generic;
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namespace BITKit
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{
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public interface IEntryGroup { }
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public interface IEntryElement
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{
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void Entry();
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void Exit();
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}
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[System.Serializable]
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public class EntryGroup<T> : IEntryGroup where T : IEntryElement
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{
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public int index = -1;
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public List<T> list = new();
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int m_index;
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public void Entry(T t)
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{
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if (t is not null)
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{
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list.TryAdd(t);
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}
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index = list.IndexOf(t);
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EnsureConfiguration();
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}
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public void Entry(int index)
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{
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if (index < list.Count)
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{
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this.index = index;
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}
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}
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public void Entry(Func<T,bool> entryFactory)
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{
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var index = list.FindIndex(x => entryFactory.Invoke(x));
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Entry(index);
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}
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public void Entry()
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{
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index = 0;
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EnsureConfiguration();
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}
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public void Exit()
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{
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index = -1;
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EnsureConfiguration();
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}
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public bool TryGetEntried(out T value)
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{
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EnsureConfiguration();
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if (index is not -1)
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{
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value = list[index];
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return true;
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}
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value = default;
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return false;
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}
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void EnsureConfiguration()
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{
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if (MathE.Equals(this.index, m_index))
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{
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}
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else
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{
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if (m_index is not -1)
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{
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list[m_index].Exit();
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}
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if (index is not -1)
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{
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list[index].Entry();
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}
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}
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m_index = index;
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}
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}
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} |