LocalFlowEnvironment文件丢失，需要重写

NodeFlow/Model/Operation/ContainerPlaceNodeOperation.cs

@@ -0,0 +1,98 @@
+using Serein.Library.Api;
+using Serein.NodeFlow.Services;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.NodeFlow.Model.Operation
+{
+    /// <summary>
+    /// 放置节点操作
+    /// </summary>
+    internal class ContainerPlaceNodeOperation : OperationBase
+    {
+        public override string Theme => nameof(ContainerPlaceNodeOperation);
+
+        /// <summary>
+        /// 所在画布
+        /// </summary>
+        public string CanvasGuid { get; set; }
+
+        /// <summary>
+        /// 子节点，该数据为此次事件的主节点
+        /// </summary>
+        public string NodeGuid { get;  set; }
+        /// <summary>
+        /// 父节点
+        /// </summary>
+        public string ContainerNodeGuid { get; set; }
+
+
+        /// <summary>
+        /// 父节点
+        /// </summary>
+        private INodeContainer ContainerNode;
+
+        /// <summary>
+        /// 子节点，该数据为此次事件的主节点
+        /// </summary>
+        private IFlowNode Node;
+
+
+
+        public override bool ValidationParameter()
+        {
+            if (!flowModelService.ContainsCanvasModel(CanvasGuid))
+            {
+                return false;
+            }
+            // 获取目标节点与容器节点
+            if (!flowModelService.TryGetNodeModel(NodeGuid, out var nodeModel))
+            {
+                return false;
+            }
+            if (!flowModelService.TryGetNodeModel(ContainerNodeGuid, out var containerNode))
+            {
+                return false;
+            }
+            if (nodeModel.ContainerNode is INodeContainer tmpContainer)
+            {
+                //SereinEnv.WriteLine(InfoType.WARN, $"节点放置失败，节点[{nodeGuid}]已经放置于容器节点[{((IFlowNode)tmpContainer).Guid}]");
+                return false;
+            }
+            if(containerNode is not INodeContainer containerNode2)
+            {
+                return false;
+            }
+
+            Node = nodeModel;
+            ContainerNode = containerNode2;
+            return true;
+        }
+
+        public override bool Execute()
+        {
+            if (!ValidationParameter()) return false;
+
+            ContainerNode.PlaceNode(Node);
+            flowEnvironmentEvent.OnNodePlace(new NodePlaceEventArgs(CanvasGuid, NodeGuid, ContainerNodeGuid)); // 通知UI更改节点放置位置
+            return true;
+        }
+
+        public override bool Undo()
+        {
+            ContainerNode.TakeOutNode(Node);
+            flowEnvironmentEvent.OnNodeTakeOut(new NodeTakeOutEventArgs(CanvasGuid, NodeGuid)); // 重新放置在画布上
+            return true;
+        }
+
+
+        public override void ToInfo()
+        {
+        }
+
+      
+    }
+}