feat: electron app (#1586)

apps/electron/layers/main/src/main-window.ts

@@ -0,0 +1,78 @@
+import { BrowserWindow } from 'electron';
+import electronWindowState from 'electron-window-state';
+import { join } from 'path';
+
+const IS_DEV = process.env.NODE_ENV === 'development';
+
+async function createWindow() {
+  const mainWindowState = electronWindowState({
+    defaultWidth: 1000,
+    defaultHeight: 800,
+  });
+
+  const browserWindow = new BrowserWindow({
+    x: mainWindowState.x,
+    y: mainWindowState.y,
+    width: mainWindowState.width,
+    height: mainWindowState.height,
+    show: false, // Use 'ready-to-show' event to show window
+    webPreferences: {
+      contextIsolation: true,
+      sandbox: false,
+      webviewTag: false, // The webview tag is not recommended. Consider alternatives like iframe or Electron's BrowserView. https://www.electronjs.org/docs/latest/api/webview-tag#warning
+      spellcheck: false, // FIXME: enable?
+      preload: join(__dirname, '../../preload/dist/index.js'),
+    },
+  });
+
+  mainWindowState.manage(browserWindow);
+
+  /**
+   * If you install `show: true` then it can cause issues when trying to close the window.
+   * Use `show: false` and listener events `ready-to-show` to fix these issues.
+   *
+   * @see https://github.com/electron/electron/issues/25012
+   */
+  browserWindow.on('ready-to-show', () => {
+    browserWindow.show();
+
+    if (IS_DEV) {
+      browserWindow.webContents.openDevTools();
+    }
+  });
+
+  browserWindow.on('close', e => {
+    e.preventDefault();
+    browserWindow.destroy();
+    // TODO: gracefully close the app, for example, ask user to save unsaved changes
+  });
+
+  /**
+   * URL for main window.
+   */
+  const pageUrl =
+    IS_DEV && process.env.DEV_SERVER_URL !== undefined
+      ? process.env.DEV_SERVER_URL
+      : 'file://./index.html'; // see protocol.ts
+
+  await browserWindow.loadURL(pageUrl);
+
+  return browserWindow;
+}
+
+/**
+ * Restore existing BrowserWindow or Create new BrowserWindow
+ */
+export async function restoreOrCreateWindow() {
+  let window = BrowserWindow.getAllWindows().find(w => !w.isDestroyed());
+
+  if (window === undefined) {
+    window = await createWindow();
+  }
+
+  if (window.isMinimized()) {
+    window.restore();
+  }
+
+  window.focus();
+}