observeCurrentKeyboardLayout not working when invoke by node

[chemzqm]

I have code

const KeyboardLayout = require('keyboard-layout')

let subscription = KeyboardLayout.observeCurrentKeyboardLayout((layout) => console.log(layout))

and run node test.js
I can get the output after first run, but no more when I change keyboard layout.

[chemzqm]

I've figured out the callback notificationHandler would never get called

[chemzqm]

Ok, I find out that the CFNotificationCenterAddObserver of Mac not works when using command line, it works with app.

[chemzqm]

I've got the fix:

//uv_loop_t *loop = uv_default_loop();
//uv_async_t async;

static void notificationHandler(CFNotificationCenterRef center, void *manager, CFStringRef name, const void *object, CFDictionaryRef userInfo) {
  //async.data = manager;
  //uv_async_send(&async);
  //manager->HandleKeyboardLayoutChanged();
  //callback->Call(0, NULL);
  (static_cast<IMSelectManager *>(manager))->HandleKeyboardLayoutChanged();
}

static void asyncSendHandler(uv_async_t *handle) {
  (static_cast<IMSelectManager *>(handle->data))->HandleKeyboardLayoutChanged();
}

IMSelectManager::IMSelectManager(Nan::Callback *callback) : callback(callback) {
  //uv_async_init(loop, &async, (uv_async_cb) asyncSendHandler);

  CFNotificationCenterAddObserver(
      CFNotificationCenterGetDistributedCenter(),
      this,
      &notificationHandler,
      kTISNotifySelectedKeyboardInputSourceChanged,
      NULL,
      CFNotificationSuspensionBehaviorDeliverImmediately
  );

  CFRunLoopRun();
}

Key point is use CFRunLoopRun instead of uv_default_loop

[wirpet]

Have you anyone tried this "observeCurrentKeyboardLayout" API on Win32? I got the same issue. Changing keyboard it never trigger the callback. I'm trying to do the same here on Win32. Any suggestion or help?