57 lines
2.0 KiB
C#
57 lines
2.0 KiB
C#
#nullable enable
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using System;
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using Cysharp.Threading.Tasks;
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using ShrinkContext;
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using ShrinkEventBus;
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namespace ShrinkContext.EventBusAdapter
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{
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/// <summary>
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/// 把 ShrinkEventBus 的订阅/注册包装为可逆效应：
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/// <c>IShrinkEventSubscription.Dispose</c> 天然就是订阅的逆操作——
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/// 组件在 apply 里订阅，停用时随上下文自动退订，无需手写卸载路径。
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/// </summary>
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public static class ShrinkEventBusEffects
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{
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/// <summary>订阅事件即效应：ctx 卸载或手动 Dispose 句柄时自动退订。</summary>
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public static ShrinkEffectHandle EffectSubscribe<TEvent>(
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this ShrinkCtx ctx,
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Action<TEvent> handler,
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EventPriority priority = EventPriority.NORMAL,
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bool receiveCanceled = false)
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where TEvent : EventBase
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{
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if (ctx == null)
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throw new ArgumentNullException(nameof(ctx));
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if (handler == null)
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throw new ArgumentNullException(nameof(handler));
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var subscription = EventBus.SubscribeEvent(handler, priority, receiveCanceled);
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return ctx.EffectInverse(() =>
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{
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subscription.Dispose();
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return UniTask.CompletedTask;
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});
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}
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/// <summary>
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/// 实例对象整体注册即效应：扫描对象上的 [EventSubscribe] 方法（含未织入的非 MonoBehaviour 类），
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/// 逆操作为 Unregister。
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/// </summary>
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public static ShrinkEffectHandle EffectRegister(this ShrinkCtx ctx, object target)
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{
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if (ctx == null)
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throw new ArgumentNullException(nameof(ctx));
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if (target == null)
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throw new ArgumentNullException(nameof(target));
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EventBus.Register(target);
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return ctx.EffectInverse(() =>
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{
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EventBus.Unregister(target);
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return UniTask.CompletedTask;
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});
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}
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}
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}
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