57 lines
2.2 KiB
C#
57 lines
2.2 KiB
C#
using System.Collections.Generic;
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using System;
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using Godot;
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using System.Linq;
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public class MoveRecords {
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private readonly LinkedList<MoveRecord> records = new LinkedList<MoveRecord>(); // 使用队列替换栈
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private readonly int maxRecords; // 记录上限
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private Action<Node, Node, Vector2, Vector2> onAddRecordCallback; // 添加记录时的回调
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private Action<Node, Node, Vector2, Vector2> onUndoRecordCallback; // 撤销记录时的回调
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public MoveRecords(
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Action<Node, Node, Vector2, Vector2> onAddRecordCallback = null,
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Action<Node, Node, Vector2, Vector2> onUndoRecordCallback = null,
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int maxRecords = 32) {
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this.maxRecords = maxRecords;
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this.onAddRecordCallback = onAddRecordCallback;
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this.onUndoRecordCallback = onUndoRecordCallback;
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}
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public void AddRecord(Node newNode, Node oldNode, Vector2 newPos, Vector2 oldPos) {
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// 达到记录上限时，移除最远的记录（队首元素）
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if (records.Count >= maxRecords) {
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records.RemoveFirst();
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}
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var record = new MoveRecord(newNode, oldNode, newPos, oldPos);
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// 触发添加记录的回调
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onAddRecordCallback?.Invoke(newNode, oldNode, newPos, oldPos);
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// GD.Print("In func Addrecord: ", record.NewNode, "->", record.OldNode, ":", record.NewPos, "->", record.OldPos);
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records.AddLast(record); // 将新记录加入队尾
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}
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public void Undo() {
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if (records.Count == 0) return;
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MoveRecord record = records.Last.Value; // 移除并获取队首的记录以执行撤销操作
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records.RemoveLast();
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// 触发撤销记录的回调
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onUndoRecordCallback?.Invoke(record.NewNode, record.OldNode, record.NewPos, record.OldPos);
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}
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public void Clear() {
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records.Clear();
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}
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private class MoveRecord {
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public Node NewNode { get; }
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public Node OldNode { get; }
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public Vector2 NewPos { get; }
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public Vector2 OldPos { get; }
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public MoveRecord(Node newNode, Node oldNode, Vector2 newPos, Vector2 oldPos) {
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this.NewNode = newNode;
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this.OldNode = oldNode;
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this.OldPos = oldPos;
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this.NewPos = newPos;
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}
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}
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} |