// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/events/devices/input_device_observer_android.h"

#include "base/memory/singleton.h"

// Must come after all headers that specialize FromJniType() / ToJniType().
#include "ui/events/devices/ui_events_devices_jni_headers/InputDeviceObserver_jni.h"

using jni_zero::AttachCurrentThread;
using jni_zero::JavaParamRef;

namespace ui {

InputDeviceObserverAndroid::InputDeviceObserverAndroid() = default;

InputDeviceObserverAndroid::~InputDeviceObserverAndroid() = default;

InputDeviceObserverAndroid* InputDeviceObserverAndroid::GetInstance() {
  return base::Singleton<
      InputDeviceObserverAndroid,
      base::LeakySingletonTraits<InputDeviceObserverAndroid>>::get();
}

void InputDeviceObserverAndroid::AddObserver(
    ui::InputDeviceEventObserver* observer) {
  observers_.AddObserver(observer);
  JNIEnv* env = AttachCurrentThread();
  Java_InputDeviceObserver_addObserver(env);
}

void InputDeviceObserverAndroid::RemoveObserver(
    ui::InputDeviceEventObserver* observer) {
  observers_.RemoveObserver(observer);
  JNIEnv* env = AttachCurrentThread();
  Java_InputDeviceObserver_removeObserver(env);
}

static void JNI_InputDeviceObserver_InputConfigurationChanged(JNIEnv* env) {
  InputDeviceObserverAndroid::GetInstance()
      ->NotifyObserversDeviceConfigurationChanged();
}

void InputDeviceObserverAndroid::NotifyObserversDeviceConfigurationChanged() {
  observers_.Notify(
      &ui::InputDeviceEventObserver::OnInputDeviceConfigurationChanged,
      InputDeviceEventObserver::kMouse | InputDeviceEventObserver::kKeyboard |
          InputDeviceEventObserver::kTouchpad);
}

}  // namespace ui

DEFINE_JNI(InputDeviceObserver)