🐛 Fixed assignment issues

frontend/src/views/editor/basic/cursorPositionExtension.ts

@@ -13,11 +13,11 @@ export function createCursorPositionExtension(documentId: number) {
             private readonly debouncedSave;
 
             constructor(private view: EditorView) {
-        const { debouncedFn, flush } = createDebounce(
+                const {debouncedFn, flush} = createDebounce(
                     () => this.saveCursorPosition(),
-          { delay: 400 }
+                    {delay: 400}
                 );
-        this.debouncedSave = { fn: debouncedFn, flush };
+                this.debouncedSave = {fn: debouncedFn, flush};
 
                 // 初始化时保存一次光标位置
                 this.saveCursorPosition();
@@ -42,10 +42,11 @@ export function createCursorPositionExtension(documentId: number) {
 
             private saveCursorPosition() {
                 const cursorPos = this.view.state.selection.main.head;
-        // 持久化到 documentStore
-        this.documentStore.documentStates[documentId] = {
-            cursorPos
-        };
+                if (!this.documentStore.documentStates[documentId]) {
+                    this.documentStore.documentStates[documentId] = {cursorPos};
+                } else {
+                    this.documentStore.documentStates[documentId].cursorPos = cursorPos;
+                }
             }
         }
     );