1 files changed, 59 insertions, 0 deletions

diff --git a/packages/main/src/infrastructure/electron/impl/lockWebContentsToFile.ts b/packages/main/src/infrastructure/electron/impl/lockWebContentsToFile.ts
new file mode 100644
index 0000000..6b458e0
--- /dev/null
+++ b/packages/main/src/infrastructure/electron/impl/lockWebContentsToFile.ts
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C)  2022 Kristóf Marussy <kristof@marussy.com>
+ *
+ * This file is part of Sophie.
+ *
+ * Sophie is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { WebContents } from 'electron';
+
+import { getLogger } from '../../../utils/log';
+import type Resources from '../../resources/Resources';
+
+const log = getLogger('lockWebContentsToFile');
+
+/**
+ * Loads the specified file in the webContents and prevent navigating away.
+ *
+ * Both navigating away to a different URL and opening a new window will be disallowed.
+ *
+ * @param resources The resource handle associated with the paths and URL of the application.
+ * @param filePath The path to the file in the render package to load.
+ * @param webContents The webContents to lock.
+ */
+export default function lockWebContentsToFile(
+  resources: Resources,
+  filePath: string,
+  webContents: WebContents,
+): Promise<void> {
+  const pageURL = resources.getRendererURL(filePath);
+
+  webContents.setWindowOpenHandler(() => ({ action: 'deny' }));
+
+  webContents.on('will-navigate', (event, url) => {
+    if (url !== pageURL) {
+      log.error(
+        'Prevented webContents locked to',
+        pageURL,
+        'from navigating to',
+        url,
+      );
+      event.preventDefault();
+    }
+  });
+
+  return webContents.loadURL(pageURL);
+}