feat: notebook support keep scroll position when tab switched

Author: HellowVirgil

packages/notebook/src/browser/libro-state-manager.ts

@@ -0,0 +1,126 @@
+import { LibroView } from '@difizen/libro-jupyter/noeditor';
+
+import { Autowired, Injectable } from '@opensumi/di';
+import { StorageProvider, URI } from '@opensumi/ide-core-common';
+
+export interface INotebookViewState {
+  uri: string;
+  scrollTop: number;
+  lastActiveTime: number;
+}
+
+export interface INotebookStateManager {
+  saveState(uri: URI, libroView: LibroView): void;
+  restoreState(uri: URI, libroView: LibroView): Promise<boolean>;
+  clearState(uri: URI): void;
+  getAllStates(): Record<string, INotebookViewState>;
+}
+
+@Injectable()
+export class LibroStateManager implements INotebookStateManager {
+  private static readonly STORAGE_KEY = 'libro-notebook-states';
+  public static readonly LIBRO_SCROLL_ELEMENT = '.libro-view-content';
+
+  @Autowired(StorageProvider)
+  private readonly storageProvider: StorageProvider;
+
+  private stateCache = new Map<string, INotebookViewState>();
+
+  constructor() {
+    this.loadFromStorage();
+  }
+
+  private async loadFromStorage() {
+    try {
+      const storage = await this.storageProvider(new URI('libro-notebook-storage'));
+      const stored = await storage.get(LibroStateManager.STORAGE_KEY);
+      if (stored && typeof stored === 'object') {
+        Object.entries(stored).forEach(([uri, state]) => {
+          if (this.isValidState(state)) {
+            this.stateCache.set(uri, state as INotebookViewState);
+          }
+        });
+      }
+    } catch (error) {
+      // eslint-disable-next-line no-console
+      console.warn('Failed to load notebook states from storage:', error);
+    }
+  }
+
+  private async saveToStorage() {
+    try {
+      const storage = await this.storageProvider(new URI('libro-notebook-storage'));
+      const states: Record<string, INotebookViewState> = {};
+      this.stateCache.forEach((state, uri) => {
+        states[uri] = state;
+      });
+      await storage.set(LibroStateManager.STORAGE_KEY, states);
+    } catch (error) {
+      // eslint-disable-next-line no-console
+      console.warn('Failed to save notebook states to storage:', error);
+    }
+  }
+
+  private isValidState(state: any): state is INotebookViewState {
+    return state && typeof state === 'object' && typeof state.uri === 'string' && typeof state.scrollTop === 'number';
+  }
+
+  saveState(uri: URI, libroView: LibroView): void {
+    if (!libroView || !libroView.model || !libroView.container) {
+      return;
+    }
+
+    try {
+      const libroViewContent = libroView.container.current?.querySelector(LibroStateManager.LIBRO_SCROLL_ELEMENT);
+      const state: INotebookViewState = {
+        uri: uri.toString(),
+        scrollTop: libroViewContent?.scrollTop || 0,
+        lastActiveTime: Date.now(),
+      };
+
+      this.stateCache.set(uri.toString(), state);
+      this.saveToStorage();
+    } catch (error) {
+      // eslint-disable-next-line no-console
+      console.warn('Failed to save notebook state:', error);
+    }
+  }
+
+  async restoreState(uri: URI, libroView: LibroView): Promise<boolean> {
+    const state = this.stateCache.get(uri.toString());
+    if (!state || !libroView || !libroView.model) {
+      return false;
+    }
+
+    try {
+      const libroViewContent = libroView.container?.current?.querySelector(LibroStateManager.LIBRO_SCROLL_ELEMENT);
+      // 恢复 notebook 的滚动位置
+      if (libroViewContent) {
+        libroViewContent.scrollTop = state.scrollTop;
+      }
+
+      return true;
+    } catch (error) {
+      // eslint-disable-next-line no-console
+      console.warn('Failed to restore notebook state:', error);
+      return false;
+    }
+  }
+
+  clearState(uri: URI): void {
+    this.stateCache.delete(uri.toString());
+    this.saveToStorage();
+  }
+
+  getAllStates(): Record<string, INotebookViewState> {
+    const states: Record<string, INotebookViewState> = {};
+    this.stateCache.forEach((state, uri) => {
+      states[uri] = state;
+    });
+    return states;
+  }
+
+  getState(uri: URI): INotebookViewState | undefined {
+    return this.stateCache.get(uri.toString());
+  }
+}

packages/notebook/src/browser/libro-state.ts

@@ -0,0 +1,10 @@
+import { Provider } from '@opensumi/di';
+
+import { LibroStateManager } from './libro-state-manager';
+
+export const LibroStateModule: Provider[] = [
+  {
+    token: LibroStateManager,
+    useClass: LibroStateManager,
+  },
+];

packages/notebook/src/browser/libro.contribution.tsx

@@ -44,6 +44,7 @@ import { LibroOpensumiModule } from './libro';
 import { LibroDiffModule } from './libro/diff-view';
 import { LibroOpener } from './libro-opener';
 import { LibroVersionPreview } from './libro-preview.view';
+import { LibroStateModule } from './libro-state';
 import { initLibroColorToken } from './libro.color.tokens';
 import { LIBRO_COMPONENTS_SCHEME_ID, LIBRO_COMPONENT_ID, LIBRO_PREVIEW_COMPONENT_ID } from './libro.protocol';
 import { OpensumiLibroView } from './libro.view';
@@ -132,6 +133,8 @@ export class LibroContribution
 
   initialize(app: IClientApp) {
     initLibroOpensumi(app.injector, manaContainer);
+    // 注册状态管理模块
+    app.injector.addProviders(...LibroStateModule);
   }
 
   registerComponent(registry: ComponentRegistry) {

packages/notebook/src/browser/libro.view.tsx

@@ -1,11 +1,13 @@
 import { DocumentCommands, LibroView } from '@difizen/libro-jupyter/noeditor';
 import { CommandRegistry, Container, Disposable, ViewRender } from '@difizen/mana-app';
+import debounce from 'lodash/debounce';
 import * as React from 'react';
 
 import { message } from '@opensumi/ide-components';
 import { localize, useInjectable } from '@opensumi/ide-core-browser';
 import { ReactEditorComponent } from '@opensumi/ide-editor/lib/browser/types';
 
+import { LibroStateManager } from './libro-state-manager';
 import styles from './libro.module.less';
 import { ILibroOpensumiService } from './libro.service';
 import { ManaContainer } from './mana';
@@ -16,16 +18,47 @@ export const OpensumiLibroView: ReactEditorComponent = (...params) => {
   const libroOpensumiService = useInjectable<ILibroOpensumiService>(ILibroOpensumiService);
   const manaContainer = useInjectable<Container>(ManaContainer);
   const commandRegistry = manaContainer.get(CommandRegistry);
+  const stateManager = useInjectable<LibroStateManager>(LibroStateManager);
 
   const [libroView, setLibroView] = React.useState<LibroView | undefined>(undefined);
+  const [isStateRestored, setIsStateRestored] = React.useState(false);
+  const uri = params[0].resource.uri;
+
+  // 保存状态的函数
+  const saveNotebookState = React.useCallback(() => {
+    if (libroView && uri) {
+      stateManager.saveState(uri, libroView);
+    }
+  }, [libroView, uri, stateManager]);
+
+  // 恢复状态的函数
+  const restoreNotebookState = React.useCallback(async () => {
+    if (libroView && uri && !isStateRestored) {
+      const restored = await stateManager.restoreState(uri, libroView);
+      if (restored) {
+        setIsStateRestored(true);
+      }
+    }
+  }, [libroView, uri, stateManager, isStateRestored]);
 
   React.useEffect(() => {
     let autoSaveHandle: undefined | number;
     let modelChangeDisposer: undefined | Disposable;
-    libroOpensumiService.getOrCreateLibroView(params[0].resource.uri).then((libro) => {
+
+    // 监听滚动变化（防抖）
+    const handleScroll = debounce(() => {
+      saveNotebookState();
+    }, 500);
+
+    libroOpensumiService.getOrCreateLibroView(uri).then((libro) => {
       setLibroView(libro);
+
+      // 恢复状态
+      restoreNotebookState();
+
+      // 监听模型变化
       modelChangeDisposer = libro.model.onChanged(() => {
-        libroOpensumiService.updateDirtyStatus(params[0].resource.uri, true);
+        libroOpensumiService.updateDirtyStatus(uri, true);
         if (autoSaveHandle) {
           window.clearTimeout(autoSaveHandle);
         }
@@ -42,15 +75,37 @@ export const OpensumiLibroView: ReactEditorComponent = (...params) => {
             });
         }, AUTO_SAVE_DELAY);
       });
+
       libro.onSave(() => {
-        libroOpensumiService.updateDirtyStatus(params[0].resource.uri, false);
+        libroOpensumiService.updateDirtyStatus(uri, false);
       });
+
+      const libroViewContainer = libro.container?.current;
+
+      if (libroViewContainer) {
+        const libroViewContent = libroViewContainer.querySelector(LibroStateManager.LIBRO_SCROLL_ELEMENT);
+        libroViewContent?.addEventListener('scroll', handleScroll);
+      }
     });
+
     return () => {
       modelChangeDisposer?.dispose();
       window.clearTimeout(autoSaveHandle);
+      libroView?.container?.current
+        ?.querySelector(LibroStateManager.LIBRO_SCROLL_ELEMENT)
+        ?.removeEventListener('scroll', handleScroll);
     };
-  }, []);
+  }, [libroOpensumiService, uri, commandRegistry, stateManager, saveNotebookState, restoreNotebookState]);
+
+  // 当 notebook 完全加载后恢复状态
+  React.useEffect(() => {
+    if (libroView && !isStateRestored) {
+      const timer = setTimeout(() => {
+        restoreNotebookState();
+      }, 100);
+      return () => clearTimeout(timer);
+    }
+  }, [libroView, isStateRestored, restoreNotebookState]);
 
   return <div className={styles.libroView}>{libroView && <ViewRender view={libroView}></ViewRender>}</div>;
 };