lens/src/main/window-manager.ts

import { BrowserWindow, shell } from "electron"
import windowStateKeeper from "electron-window-state"

export class WindowManager {
  protected mainView: BrowserWindow;
  protected splashWindow: BrowserWindow;
  protected windowState: windowStateKeeper.State;

  constructor(protected proxyPort: number) {
    // Manage main window size and position with state persistence
    this.windowState = windowStateKeeper({
      defaultHeight: 900,
      defaultWidth: 1440,
    });

    const { width, height, x, y } = this.windowState;
    this.mainView = new BrowserWindow({
      x, y, width, height,
      show: false,
      minWidth: 900,
      minHeight: 760,
      titleBarStyle: "hidden",
      backgroundColor: "#1e2124",
      webPreferences: {
        nodeIntegration: true,
        enableRemoteModule: true,
        webviewTag: true,
      },
    });
    this.windowState.manage(this.mainView);

    // open external links in default browser (target=_blank, window.open)
    this.mainView.webContents.on("new-window", (event, url) => {
      event.preventDefault();
      shell.openExternal(url);
    });

    // load & show app
    this.showMain();
  }

  async showMain() {
    await this.showSplash();
    await this.mainView.loadURL(`http://localhost:${this.proxyPort}`)
    this.mainView.show();
    this.splashWindow.hide();
  }

  async showSplash() {
    if (!this.splashWindow) {
      this.splashWindow = new BrowserWindow({
        width: 500,
        height: 300,
        backgroundColor: "#1e2124",
        center: true,
        frame: false,
        resizable: false,
        show: false,
      });
      await this.splashWindow.loadURL("static://splash.html");
    }
    this.splashWindow.show();
  }

  destroy() {
    this.windowState.unmanage();
    this.splashWindow.destroy();
    this.mainView.destroy();
  }
}