add:基本实现撤销、恢复功能

src/stores/useSchemeStore.ts

@@ -1,5 +1,6 @@
 import { defineStore } from 'pinia';
 import { IPageComponent } from '@/type/IPageComponent';
+import sha256 from 'js-sha256';
 
 // 缓存对象
 const idToObjectCache = new Map<string, IPageComponent>();
@@ -24,18 +25,31 @@ function findObjectById(obj, targetId) {
     return null; // 如果没有找到，则返回null
 }
 
+const HISTORY_LENGTH = 20; // 默认队列长度
+
 export const useSchemeStore = defineStore('scheme', {
     state: () => ({
         components: [],
         previewScheme: [],
-        nowComponentsData: {}
+        nowComponentsData: {},
+        history: Array(HISTORY_LENGTH).fill(null), // 循环队列
+        currentIndex: -1, // 当前索引
+        currentLength: 0, // 当前队列中有效元素的数量
+        currentHash: '', // 当前状态的哈希值
     }),
+    getters: {
+        canUndo: (state) => state.currentIndex >= 0,
+        canRedo: (state) => state.currentIndex < state.currentLength - 1,
+    },
     actions: {
         initPreviewScheme(value) {
             this.previewScheme = value;
             this.nowComponentsData = value[0];
-            // 清空缓存
             idToObjectCache.clear();
+            this.history.fill(null); // 初始化队列
+            this.currentIndex = -1;
+            this.currentLength = 0;
+            this.currentHash = ''; // 初始化当前哈希值
         },
         initComponents(value) {
             this.components = value;
@@ -53,14 +67,46 @@ export const useSchemeStore = defineStore('scheme', {
             return obj;
         },
         updateScheme(id, updates) {
-            console.log("更新数据",JSON.stringify(updates));
-            const obj = this.getSchemeObj(id);
-            console.log("更新目标",JSON.stringify(obj));
+            const currentStateHash = this.currentHash;
+            const newObj = this.getSchemeObj(id);
+            if (newObj) {
+                Object.assign(newObj, updates);
+            }
+            const newStateHash = sha256(JSON.stringify(this.previewScheme));
 
-            if (obj) {
-                // 更新对象属性
-                Object.assign(obj, updates);
-                console.log("更新后目标",JSON.stringify(obj));
+            // 如果新状态与当前状态不同，才保存到历史记录中
+            if (currentStateHash !== newStateHash) {
+                this.currentHash = newStateHash;
+                // 如果不是最新的状态，则清除之后的所有状态
+                if (this.currentIndex < this.currentLength - 1) {
+                    this.history.fill(null, this.currentIndex + 1);
+                    this.currentLength = this.currentIndex + 1;
+                }
+                this.currentIndex++;
+                this.currentLength = this.currentIndex + 1;
+                this.history[this.currentIndex % HISTORY_LENGTH] = JSON.parse(JSON.stringify(this.previewScheme));
+            }
+        },
+        undo() {
+            if (this.canUndo) {
+                this.currentIndex--;
+                const prevState = this.history[this.currentIndex % HISTORY_LENGTH];
+                if (prevState) {
+                    this.previewScheme = prevState;
+                    this.nowComponentsData = this.previewScheme[0];
+                    this.currentHash = sha256(JSON.stringify(this.previewScheme));
+                }
+            }
+        },
+        redo() {
+            if (this.canRedo) {
+                this.currentIndex++;
+                const nextState = this.history[this.currentIndex % HISTORY_LENGTH];
+                if (nextState) {
+                    this.previewScheme = nextState;
+                    this.nowComponentsData = this.previewScheme[0];
+                    this.currentHash = sha256(JSON.stringify(this.previewScheme));
+                }
             }
         }
     }