164 lines
4.4 KiB
C#
164 lines
4.4 KiB
C#
using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace AibisDream.Framework
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{
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/// <summary>
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/// 单播事件系统
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/// 特点：通过枚举索引事件，多处可触发，但仅有一个方法能被注册（后注册覆盖先注册）
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/// 用途：用于解耦项目中的单例依赖
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/// </summary>
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public class SingleCastEventSystem
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{
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public static readonly SingleCastEventSystem Global = new();
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// 内部接口：用于统一存储不同类型的事件
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private interface IEventEntry
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{
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}
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// 类型化的条目存储
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private class Entry<T> : IEventEntry where T : Delegate
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{
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public T Handler;
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}
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// 按枚举类型分组的存储
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// Key: 枚举类型, Value: 该枚举所有值的条目数组
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private readonly Dictionary<Type, IEventEntry[]> _entries = new(50);
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#region 无参数
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public void Register<T>(T key, Action handler) where T : IConvertible
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{
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var entry = GetEntry<T, Action>(key);
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#if DEBUG
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if (entry.Handler != null)
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{
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Debug.LogWarning($"[SingleCastEvent] {typeof(T).Name}.{key} 已被注册，正在覆盖");
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}
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#endif
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entry.Handler = handler;
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}
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public void Trigger<T>(T key) where T : IConvertible
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{
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var entry = GetEntryOrNull<T, Action>(key);
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entry?.Handler?.Invoke();
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}
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#endregion
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#region 1个参数
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public void Register<T, T1>(T key, Action<T1> handler) where T : IConvertible
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{
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var entry = GetEntry<T, Action<T1>>(key);
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#if DEBUG
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if (entry.Handler != null)
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{
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Debug.LogWarning($"[SingleCastEvent] {typeof(T).Name}.{key} 已被注册，正在覆盖");
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}
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#endif
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entry.Handler = handler;
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}
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public void Trigger<T, T1>(T key, T1 arg1) where T : IConvertible
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{
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var entry = GetEntryOrNull<T, Action<T1>>(key);
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entry?.Handler?.Invoke(arg1);
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}
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#endregion
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#region 2个参数
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public void Register<T, T1, T2>(T key, Action<T1, T2> handler) where T : IConvertible
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{
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var entry = GetEntry<T, Action<T1, T2>>(key);
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#if DEBUG
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if (entry.Handler != null)
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{
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Debug.LogWarning($"[SingleCastEvent] {typeof(T).Name}.{key} 已被注册，正在覆盖");
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}
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#endif
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entry.Handler = handler;
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}
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public void Trigger<T, T1, T2>(T key, T1 arg1, T2 arg2) where T : IConvertible
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{
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var entry = GetEntryOrNull<T, Action<T1, T2>>(key);
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entry?.Handler?.Invoke(arg1, arg2);
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}
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#endregion
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#region 注销
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public void Unregister<T>(T key) where T : IConvertible
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{
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var index = key.ToInt32(null);
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var enumType = typeof(T);
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if (_entries.TryGetValue(enumType, out var arr) && index < arr.Length)
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{
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arr[index] = null;
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}
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}
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public void UnregisterAll()
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{
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_entries.Clear();
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}
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#endregion
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#region 内部辅助方法
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private Entry<TDelegate> GetEntry<TEnum, TDelegate>(TEnum key)
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where TEnum : IConvertible
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where TDelegate : Delegate
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{
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var index = key.ToInt32(null);
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var enumType = typeof(TEnum);
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if (!_entries.TryGetValue(enumType, out var arr))
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{
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// 首次使用该枚举类型，创建条目数组
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var valueCount = Enum.GetValues(enumType).Length;
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arr = new IEventEntry[valueCount];
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_entries[enumType] = arr;
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}
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if (arr[index] == null)
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{
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arr[index] = new Entry<TDelegate>();
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}
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return (Entry<TDelegate>)arr[index];
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}
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private Entry<TDelegate> GetEntryOrNull<TEnum, TDelegate>(TEnum key)
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where TEnum : IConvertible
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where TDelegate : Delegate
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{
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var index = key.ToInt32(null);
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var enumType = typeof(TEnum);
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if (!_entries.TryGetValue(enumType, out var arr)) return null;
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if (index >= arr.Length) return null;
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return arr[index] as Entry<TDelegate>;
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}
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#endregion
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}
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}
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