TypeScript docregistry.IDocumentRegistry类代码示例

/**
 * Activate the table widget extension.
 */
function activate(app: JupyterLab, registry: IDocumentRegistry, restorer: ILayoutRestorer): void {
  const factory = new CSVViewerFactory({
    name: FACTORY,
    fileExtensions: ['.csv'],
    defaultFor: ['.csv']
  });
  const tracker = new InstanceTracker<CSVViewer>({
    namespace: 'csvviewer',
    shell: app.shell
  });

  // Handle state restoration.
  restorer.restore(tracker, {
    command: 'file-operations:open',
    args: widget => ({ path: widget.context.path, factory: FACTORY }),
    name: widget => widget.context.path
  });

  registry.addWidgetFactory(factory);
  factory.widgetCreated.connect((sender, widget) => {
    // Track the widget.
    tracker.add(widget);
    // Notify the instance tracker if restore data needs to update.
    widget.context.pathChanged.connect(() => { tracker.save(widget); });
  });
}

/**
 * Activate the markdown plugin.
 */
function activate(app: JupyterLab, registry: IDocumentRegistry, rendermime: IRenderMime, restorer: ILayoutRestorer) {
    const factory = new MarkdownWidgetFactory({
      name: FACTORY,
      fileExtensions: ['.md'],
      rendermime
    });
    const shell = app.shell;
    const namespace = 'rendered-markdown';
    const tracker = new InstanceTracker<MarkdownWidget>({ namespace, shell });

    // Handle state restoration.
    restorer.restore(tracker, {
      command: 'file-operations:open',
      args: widget => ({ path: widget.context.path, factory: FACTORY }),
      name: widget => widget.context.path
    });

    factory.widgetCreated.connect((sender, widget) => {
      widget.title.icon = TEXTEDITOR_ICON_CLASS;
      // Notify the instance tracker if restore data needs to update.
      widget.context.pathChanged.connect(() => { tracker.save(widget); });
      tracker.add(widget);
    });

    registry.addWidgetFactory(factory);
  }

/**
 * Activate the image widget extension.
 */
function activate(app: JupyterLab, registry: IDocumentRegistry, palette: ICommandPalette, restorer: ILayoutRestorer): IImageTracker {
  const namespace = 'image-widget';
  const factory = new ImageWidgetFactory({
    name: FACTORY,
    modelName: 'base64',
    fileExtensions: EXTENSIONS,
    defaultFor: EXTENSIONS
  });
  const { shell } = app;
  const tracker = new InstanceTracker<ImageWidget>({ namespace, shell });

  // Handle state restoration.
  restorer.restore(tracker, {
    command: 'file-operations:open',
    args: widget => ({ path: widget.context.path, factory: FACTORY }),
    name: widget => widget.context.path
  });

  registry.addWidgetFactory(factory);

  factory.widgetCreated.connect((sender, widget) => {
    // Notify the instance tracker if restore data needs to update.
    widget.context.pathChanged.connect(() => { tracker.save(widget); });
    tracker.add(widget);
  });

  let category = 'Image Widget';
  [CommandIDs.zoomIn, CommandIDs.zoomOut, CommandIDs.resetZoom]
    .forEach(command => { palette.addItem({ command, category }); });

  return tracker;
}

/**
 * Create a context menu for the file browser listing.
 *
 * #### Notes
 * This function generates temporary commands with an incremented name. These
 * commands are disposed when the menu itself is disposed.
 */
function createContextMenu(path: string, commands: CommandRegistry, registry: IDocumentRegistry):  Menu {
  const menu = new Menu({ commands });

  menu.addItem({ command: CommandIDs.open });

  const ext = DocumentRegistry.extname(path);
  const factories = registry.preferredWidgetFactories(ext).map(f => f.name);
  if (path && factories.length > 1) {
    const command =  'file-operations:open';
    const openWith = new Menu({ commands });
    openWith.title.label = 'Open With...';
    factories.forEach(factory => {
      openWith.addItem({ args: { factory, path }, command });
    });
    menu.addItem({ type: 'submenu', submenu: openWith });
  }

  menu.addItem({ command: CommandIDs.rename });
  menu.addItem({ command: CommandIDs.del });
  menu.addItem({ command: CommandIDs.duplicate });
  menu.addItem({ command: CommandIDs.cut });
  menu.addItem({ command: CommandIDs.copy });
  menu.addItem({ command: CommandIDs.paste });
  menu.addItem({ command: CommandIDs.download });
  menu.addItem({ command: CommandIDs.shutdown });

  return menu;
}

/**
 * Populate the command palette and the file menu with the registered creators.
 */
function populateCreators(app: JupyterLab, docManager: IDocumentManager, registry: IDocumentRegistry, palette: ICommandPalette, menu: Menu): void {
  const category = 'File Operations';

  // Clear any previously added creator palette items.
  if (Private.creators) {
    Private.creators.dispose();
  }
  Private.creators = new DisposableSet();

  // Add the "create from" commands.
  each(registry.creators(), creator => {
    const command = CommandIDs.createFrom;
    const creatorName = creator.name;
    const label = `New ${creatorName}`;
    const args = { creatorName, label };
    menu.insertItem(0, { args, command });
    Private.creators.add(palette.addItem({ args, category, command }));
  });
}

/**
 * Activate the editor tracker plugin.
 */
function activate(app: JupyterLab, registry: IDocumentRegistry, restorer: ILayoutRestorer, editorServices: IEditorServices, launcher: ILauncher | null): IEditorTracker {
  const factory = new EditorWidgetFactory({
    editorServices,
    factoryOptions: {
      name: FACTORY,
      fileExtensions: ['*'],
      defaultFor: ['*']
    }
  });
  const shell = app.shell;
  const tracker = new InstanceTracker<EditorWidget>({
    namespace: 'editor',
    shell
  });

  // Handle state restoration.
  restorer.restore(tracker, {
    command: 'file-operations:open',
    args: widget => ({ path: widget.context.path, factory: FACTORY }),
    name: widget => widget.context.path
  });

  factory.widgetCreated.connect((sender, widget) => {
    widget.title.icon = EDITOR_ICON_CLASS;
    // Notify the instance tracker if restore data needs to update.
    widget.context.pathChanged.connect(() => { tracker.save(widget); });
    tracker.add(widget);
  });
  registry.addWidgetFactory(factory);

  addDefaultCommands(tracker, app.commands);

  // Add a launcher item if the launcher is available.
  if (launcher) {
    launcher.add({
      name: 'Text Editor',
      command: 'filebrowser:new-text-file'
    });
  }

  return tracker;
}

/**
 * Activate the editor tracker plugin.
 */
function activate(app: JupyterLab, registry: IDocumentRegistry, restorer: ILayoutRestorer, editorServices: IEditorServices, state: IStateDB, launcher: ILauncher | null): IEditorTracker {
  const factory = new FileEditorFactory({
    editorServices,
    factoryOptions: {
      name: FACTORY,
      fileExtensions: ['*'],
      defaultFor: ['*']
    }
  });
  const { commands, shell } = app;
  const id = 'editor:settings';
  const tracker = new InstanceTracker<FileEditor>({
    namespace: 'editor',
    shell
  });

  let lineNumbers = true;
  let wordWrap = true;

  // Handle state restoration.
  restorer.restore(tracker, {
    command: 'file-operations:open',
    args: widget => ({ path: widget.context.path, factory: FACTORY }),
    name: widget => widget.context.path
  });

  // Fetch the initial state of the settings.
  state.fetch(id).then(settings => {
    if (!settings) {
      return;
    }
    if (typeof settings['wordWrap'] === 'string') {
      commands.execute(CommandIDs.wordWrap, settings);
    }
    if (typeof settings['lineNumbers'] === 'string') {
      commands.execute(CommandIDs.lineNumbers, settings);
    }
  });

  /**
   * Save the editor widget settings state.
   */
  function saveState(): Promise<void> {
    return state.save(id, { lineNumbers, wordWrap });
  }

  factory.widgetCreated.connect((sender, widget) => {
    widget.title.icon = EDITOR_ICON_CLASS;
    // Notify the instance tracker if restore data needs to update.
    widget.context.pathChanged.connect(() => { tracker.save(widget); });
    tracker.add(widget);
    widget.editor.lineNumbers = lineNumbers;
    widget.editor.wordWrap = wordWrap;
  });
  registry.addWidgetFactory(factory);

  /**
   * Handle the settings of new widgets.
   */
  tracker.widgetAdded.connect((sender, widget) => {
    let editor = widget.editor;
    editor.lineNumbers = lineNumbers;
    editor.wordWrap = wordWrap;
  });

  /**
   * Toggle editor line numbers
   */
  function toggleLineNums(args: JSONObject): Promise<void> {
    lineNumbers = !lineNumbers;
    tracker.forEach(widget => {
      widget.editor.lineNumbers = lineNumbers;
    });
    return saveState();
  }

  /**
   * Toggle editor line wrap
   */
  function toggleLineWrap(args: JSONObject): Promise<void> {
    wordWrap = !wordWrap;
    tracker.forEach(widget => {
      widget.editor.wordWrap = wordWrap;
    });
    return saveState();
  }

  /**
   * A test for whether the tracker has an active widget.
   */
  function hasWidget(): boolean {
    return tracker.currentWidget !== null;
  }

  commands.addCommand(CommandIDs.lineNumbers, {
    execute: toggleLineNums,
    isEnabled: hasWidget,
//.........这里部分代码省略.........

/**
 * Activate the notebook handler extension.
 */
function activateNotebookHandler(app: JupyterLab, registry: IDocumentRegistry, services: IServiceManager, rendermime: IRenderMime, mainMenu: IMainMenu, palette: ICommandPalette, contentFactory: NotebookPanel.IContentFactory, editorServices: IEditorServices, restorer: ILayoutRestorer, launcher: ILauncher | null): INotebookTracker {

  const factory = new NotebookWidgetFactory({
    name: FACTORY,
    fileExtensions: ['.ipynb'],
    modelName: 'notebook',
    defaultFor: ['.ipynb'],
    preferKernel: true,
    canStartKernel: true,
    rendermime,
    contentFactory,
    mimeTypeService: editorServices.mimeTypeService
  });

  const shell = app.shell;
  const tracker = new NotebookTracker({ namespace: 'notebook', shell });

  // Handle state restoration.
  restorer.restore(tracker, {
    command: 'file-operations:open',
    args: panel => ({ path: panel.context.path, factory: FACTORY }),
    name: panel => panel.context.path,
    when: services.ready
  });

  registry.addModelFactory(new NotebookModelFactory({}));
  registry.addWidgetFactory(factory);
  registry.addFileType({
    name: 'Notebook',
    extension: '.ipynb',
    contentType: 'notebook',
    fileFormat: 'json'
  });
  registry.addCreator({
    name: 'Notebook',
    fileType: 'Notebook',
    widgetName: 'Notebook'
  });

  addCommands(app, services, tracker);
  populatePalette(palette);

  let id = 0; // The ID counter for notebook panels.

  factory.widgetCreated.connect((sender, widget) => {
    // If the notebook panel does not have an ID, assign it one.
    widget.id = widget.id || `notebook-${++id}`;
    widget.title.icon = NOTEBOOK_ICON_CLASS;
    // Notify the instance tracker if restore data needs to update.
    widget.context.pathChanged.connect(() => { tracker.save(widget); });
    // Add the notebook panel to the tracker.
    tracker.add(widget);
  });

  // Add main menu notebook menu.
  mainMenu.addMenu(createMenu(app), { rank: 20 });

  // Add a launcher item if the launcher is available.
  if (launcher) {
    launcher.add({
      args: { creatorName: 'Notebook' },
      command: 'file-operations:create-from',
      name: 'Notebook'
    });
  }

  app.contextMenu.addItem({command: CommandIDs.clearOutputs, selector: '.jp-Notebook .jp-Cell'});
  app.contextMenu.addItem({command: CommandIDs.split, selector: '.jp-Notebook .jp-Cell'});
  app.contextMenu.addItem({ type: 'separator', selector: '.jp-Notebook', rank: 0 });
  app.contextMenu.addItem({command: CommandIDs.undo, selector: '.jp-Notebook', rank: 1});
  app.contextMenu.addItem({command: CommandIDs.redo, selector: '.jp-Notebook', rank: 2});
  app.contextMenu.addItem({ type: 'separator', selector: '.jp-Notebook', rank: 0 });
  app.contextMenu.addItem({command: CommandIDs.createConsole, selector: '.jp-Notebook', rank: 3});

  return tracker;
}

/**
 * Activate the file browser in the sidebar.
 */
function activateFileBrowser(app: JupyterLab, factory: IFileBrowserFactory, manager: IServiceManager, documentManager: IDocumentManager, registry: IDocumentRegistry, mainMenu: IMainMenu, palette: ICommandPalette, restorer: ILayoutRestorer): void {
  const { commands } = app;
  const category = 'File Operations';
  const fbWidget = factory.createFileBrowser('filebrowser', {
    commands: commands,
    documentManager: documentManager,
    serviceManager: manager
  });

  // Let the application restorer track the primary file browser (that is
  // automatically created) for restoration of application state (e.g. setting
  // the file browser as the current side bar widget).
  //
  // All other file browsers created by using the factory function are
  // responsible for their own restoration behavior, if any.
  restorer.add(fbWidget, namespace);

  let creatorCmds: { [key: string]: DisposableSet } = Object.create(null);
  let addCreator = (name: string) => {
    let disposables = creatorCmds[name] = new DisposableSet();
    let command = Private.commandForName(name);
    disposables.add(commands.addCommand(command, {
      execute: () => fbWidget.createFrom(name),
      label: `New ${name}`
    }));
    disposables.add(palette.addItem({ command, category }));
  };

  each(registry.creators(), creator => { addCreator(creator.name); });

  // Add a context menu to the dir listing.
  let node = fbWidget.node.getElementsByClassName('jp-DirListing-content')[0];
  node.addEventListener('contextmenu', (event: MouseEvent) => {
    event.preventDefault();
    let path = fbWidget.pathForClick(event) || '';
    let ext = DocumentRegistry.extname(path);
    let factories = registry.preferredWidgetFactories(ext);
    let widgetNames = toArray(map(factories, factory => factory.name));
    let prefix = `${namespace}-contextmenu-${++Private.id}`;
    let openWith: Menu = null;
    if (path && widgetNames.length > 1) {
      let disposables = new DisposableSet();
      let command: string;

      openWith = new Menu({ commands });
      openWith.title.label = 'Open With...';
      openWith.disposed.connect(() => { disposables.dispose(); });

      for (let widgetName of widgetNames) {
        command = `${prefix}:${widgetName}`;
        disposables.add(commands.addCommand(command, {
          execute: () => fbWidget.openPath(path, widgetName),
          label: widgetName
        }));
        openWith.addItem({ command });
      }
    }

    let menu = createContextMenu(fbWidget, openWith);
    menu.open(event.clientX, event.clientY);
  });

  addCommands(app, fbWidget);

  let menu = createMenu(app, Object.keys(creatorCmds));
  mainMenu.addMenu(menu, { rank: 1 });

  fbWidget.title.label = 'Files';
  app.shell.addToLeftArea(fbWidget, { rank: 100 });

  // If the layout is a fresh session without saved data, open file browser.
  app.restored.then(layout => {
    if (layout.fresh) {
      app.commands.execute(CommandIDs.showBrowser, void 0);
    }
  });

  // Handle fileCreator items as they are added.
  registry.changed.connect((sender, args) => {
    if (args.type === 'fileCreator') {
      menu.dispose();
      let name = args.name;
      if (args.change === 'added') {
        addCreator(name);
      } else {
        creatorCmds[name].dispose();
        delete creatorCmds[name];
      }
      menu = createMenu(app, Object.keys(creatorCmds));
      mainMenu.addMenu(menu, { rank: 1 });
    }
  });
}

  node.addEventListener('contextmenu', (event: MouseEvent) => {
    event.preventDefault();
    let path = fbWidget.pathForClick(event) || '';
    let ext = DocumentRegistry.extname(path);
    let factories = registry.preferredWidgetFactories(ext);
    let widgetNames = toArray(map(factories, factory => factory.name));
    let prefix = `${namespace}-contextmenu-${++Private.id}`;
    let openWith: Menu = null;
    if (path && widgetNames.length > 1) {
      let disposables = new DisposableSet();
      let command: string;

      openWith = new Menu({ commands });
      openWith.title.label = 'Open With...';
      openWith.disposed.connect(() => { disposables.dispose(); });

      for (let widgetName of widgetNames) {
        command = `${prefix}:${widgetName}`;
        disposables.add(commands.addCommand(command, {
          execute: () => fbWidget.openPath(path, widgetName),
          label: widgetName
        }));
        openWith.addItem({ command });
      }
    }

    let menu = createContextMenu(fbWidget, openWith);
    menu.open(event.clientX, event.clientY);
  });