From 5a6db9bd4842be0a64a0a586cdabefc47459d6c1 Mon Sep 17 00:00:00 2001
From: talksik <patel.arjun50@gmail.com>
Date: Sun, 12 Apr 2026 13:30:18 -0700
Subject: [PATCH] fix: harden production electron app behavior

- No developer tools or zoom
- No refresh window
- Open links externally
---
 js/src/main.ts | 73 +++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 67 insertions(+), 6 deletions(-)

diff --git a/js/src/main.ts b/js/src/main.ts
index 0ee644b..3db9d71 100644
--- a/js/src/main.ts
+++ b/js/src/main.ts
@@ -5,12 +5,14 @@ import { updateElectronApp, UpdateSourceType } from 'update-electron-app';
 
 import type { LinkMetadata } from './lib/link-metadata';
 
-updateElectronApp({
-  updateSource: {
-    type: UpdateSourceType.StaticStorage,
-    baseUrl: `https://storage.googleapis.com/flowy-releases/llink/${process.platform}/${process.arch}`
-  }
-});
+if (app.isPackaged) {
+  updateElectronApp({
+    updateSource: {
+      type: UpdateSourceType.StaticStorage,
+      baseUrl: `https://storage.googleapis.com/flowy-releases/llink/${process.platform}/${process.arch}`
+    }
+  });
+}
 
 // Handle creating/removing shortcuts on Windows when installing/uninstalling.
 if (started) {
@@ -27,6 +29,61 @@ let autoplayWindow: BrowserWindow | null = null;
 let huddleWindow: BrowserWindow | null = null;
 let screenRecordWindow: BrowserWindow | null = null;
 
+function hardenWindow(win: BrowserWindow) {
+  const wc = win.webContents;
+
+  // Disable pinch / Cmd+scroll zoom; our layouts assume DPR=1.
+  wc.setVisualZoomLevelLimits(1, 1);
+
+  // Block devtools, reload, and zoom keyboard shortcuts in packaged builds.
+  wc.on('before-input-event', (event, input) => {
+    if (input.type !== 'keyDown') return;
+    const key = input.key.toLowerCase();
+    const cmdOrCtrl = input.meta || input.control;
+
+    const isDevtools =
+      key === 'f12' ||
+      (cmdOrCtrl && input.alt && key === 'i') ||
+      (cmdOrCtrl && input.shift && key === 'i') ||
+      (cmdOrCtrl && input.shift && key === 'c') ||
+      (cmdOrCtrl && input.shift && key === 'j');
+    const isReload = cmdOrCtrl && (key === 'r' || key === 'f5');
+    const isZoom = cmdOrCtrl && (key === '=' || key === '+' || key === '-' || key === '0');
+
+    if (app.isPackaged && (isDevtools || isReload)) {
+      event.preventDefault();
+    }
+    if (isZoom) {
+      event.preventDefault();
+    }
+  });
+
+  // Route window.open / target=_blank through the OS browser instead of a new BrowserWindow.
+  wc.setWindowOpenHandler(({ url }) => {
+    if (url.startsWith('http://') || url.startsWith('https://')) {
+      shell.openExternal(url);
+    }
+    return { action: 'deny' };
+  });
+
+  // Freeze the window to its initial origin — block any full-page navigation.
+  // In-app routing uses pushState / hash which don't trigger will-navigate.
+  wc.on('will-navigate', (event, url) => {
+    const currentUrl = wc.getURL();
+    if (!currentUrl) return;
+    try {
+      if (new URL(url).origin !== new URL(currentUrl).origin) {
+        event.preventDefault();
+        if (url.startsWith('http://') || url.startsWith('https://')) {
+          shell.openExternal(url);
+        }
+      }
+    } catch {
+      event.preventDefault();
+    }
+  });
+}
+
 const createWindow = () => {
   mainWindow = new BrowserWindow({
     width: 800,
@@ -39,6 +96,7 @@ const createWindow = () => {
       backgroundThrottling: false,
     },
   });
+  hardenWindow(mainWindow);
 
   if (MAIN_WINDOW_VITE_DEV_SERVER_URL) {
     mainWindow.loadURL(MAIN_WINDOW_VITE_DEV_SERVER_URL);
@@ -72,6 +130,7 @@ const createAutoplayWindow = () => {
     },
   });
   autoplayWindow.setVisibleOnAllWorkspaces(true);
+  hardenWindow(autoplayWindow);
 
   if (AUTOPLAY_WINDOW_VITE_DEV_SERVER_URL) {
     autoplayWindow.loadURL(AUTOPLAY_WINDOW_VITE_DEV_SERVER_URL);
@@ -103,6 +162,7 @@ const createHuddleWindow = () => {
       preload: path.join(__dirname, 'preload.js'),
     },
   });
+  hardenWindow(huddleWindow);
 
   if (HUDDLE_WINDOW_VITE_DEV_SERVER_URL) {
     huddleWindow.loadURL(HUDDLE_WINDOW_VITE_DEV_SERVER_URL);
@@ -147,6 +207,7 @@ const createScreenRecordWindow = () => {
     },
   });
   screenRecordWindow.setVisibleOnAllWorkspaces(true);
+  hardenWindow(screenRecordWindow);
 
   if (SCREEN_RECORD_WINDOW_VITE_DEV_SERVER_URL) {
     screenRecordWindow.loadURL(SCREEN_RECORD_WINDOW_VITE_DEV_SERVER_URL);