88 lines
3.2 KiB
C#
88 lines
3.2 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using System;
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using UnityEngine;
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using Ichni.RhythmGame;
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namespace Ichni.Editor.Commands
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{
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public class ChangeValueCommand : ICommand
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{
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private IBaseElement target;
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private string path;
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private object oldValue;
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private object newValue;
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private float timestamp;
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// 合并窗口期：同一字段 1 秒内的接连覆盖，只算作一次编辑行为
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private const float MERGE_WINDOW = 1f;
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public ChangeValueCommand(IBaseElement target, string path, object newValue)
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{
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this.target = target;
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this.path = path;
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this.newValue = newValue;
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this.oldValue = ReflectionHelper.GetDeepValue(target, path);
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this.timestamp = Time.realtimeSinceStartup;
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}
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public void Execute()
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{
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if (target == null) return;
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ReflectionHelper.SetDeepValue(target, path, newValue);
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// 修复：必须主动唤醒目标通知其数据已完成覆写，否则拖拽属性将无法立刻映射到真实世界物体
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target.Refresh();
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}
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public void Undo()
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{
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// 防暴毙机制：如果所附着的对象因为其它原因在场景中已被销毁（如删除该 Note），自动拦截撤销并停止访问底层数据。
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if (target == null) return;
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ReflectionHelper.SetDeepValue(target, path, oldValue);
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target.Refresh();
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// 通知 UI 面板重载（保证数据被回滚后，界面的参数显示不再是之前打错的值）
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RefreshInspectorIfMatched();
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}
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public void Redo()
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{
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if (target == null) return;
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ReflectionHelper.SetDeepValue(target, path, newValue);
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target.Refresh();
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RefreshInspectorIfMatched();
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}
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public bool TryMerge(ICommand other)
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{
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if (other is ChangeValueCommand otherCommand)
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{
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// 若对象、路径完全一致，则尝试吞并它的新值
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if (System.Object.ReferenceEquals(this.target, otherCommand.target) &&
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this.path == otherCommand.path &&
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(otherCommand.timestamp - this.timestamp) < MERGE_WINDOW)
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{
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this.newValue = otherCommand.newValue;
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this.timestamp = otherCommand.timestamp;
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return true;
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}
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}
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return false;
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}
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private void RefreshInspectorIfMatched()
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{
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var inspector = EditorManager.instance.uiManager.inspector;
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if (inspector != null && inspector.connectedGameElement != null)
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{
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// 由于目前 DynamicUI 未实现细粒度的数据绑定事件派发，发生撤回时，我们重新装载选择一次右侧属性窗面板以完成显示同步。
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// 借由我们之前的对象池机制，这个 SetInspector 消耗会在低于 1ms 的时间内无感重构。
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inspector.SetInspector(inspector.connectedGameElement);
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}
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}
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}
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}
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