问电子:如何从渲染过程中填充菜单？

EN

 {
      label: 'Open Recent',
      role: 'recentdocuments',
      submenu: [
        {
          label: 'Clear Recent',
          role: 'clearrecentdocuments'
        }
      ]
    },

function updateRecents(path, clear = false) {
  const currentMenu = Menu.getApplicationMenu();
  if (!currentMenu) return;

  const recents = getItemByKey(currentMenu, 'recents');
  if (!recents) return;

  // Clear menu if requested.
  if (clear) {
    config.set('recentDocuments', []);
    recents.submenu.clear();
    recents.submenu.append(new MenuItem({ key: 'null', label: 'No Recent Documents', enabled: false }));
    Menu.setApplicationMenu(currentMenu);
    return;
  }

  const item = new MenuItem({
    label: require('path').basename(path),
    click: () => this.open(path)
  });

  // If first recent item clear empty placeholder.
  if (recents.submenu.items[0].key == 'null') {
    recents.submenu.clear();
    recents.submenu.append(item);
  }
  // Limit to maximum 10 recents.
  else if (recents.submenu.items.length >= 10) {
    const items = recents.submenu.items;
    recents.submenu.clear();
    items.push(item);
    items.slice(10).forEach((i) => recents.submenu.append(i));
  }
  // Otherwise just add item.
  else recents.submenu.append(item);

  // Update application menu.
  Menu.setApplicationMenu(currentMenu);
}