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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/application_status_listener.h"
#include <jni.h>
#include "base/lazy_instance.h"
#include "base/observer_list_threadsafe.h"
#include "jni/ApplicationStatus_jni.h"
namespace base {
namespace android {
namespace {
struct LeakyLazyObserverListTraits :
base::internal::LeakyLazyInstanceTraits<
ObserverListThreadSafe<ApplicationStatusListener> > {
static ObserverListThreadSafe<ApplicationStatusListener>*
New(void* instance) {
ObserverListThreadSafe<ApplicationStatusListener>* ret =
base::internal::LeakyLazyInstanceTraits<ObserverListThreadSafe<
ApplicationStatusListener>>::New(instance);
// Leaky.
ret->AddRef();
return ret;
}
};
LazyInstance<ObserverListThreadSafe<ApplicationStatusListener>,
LeakyLazyObserverListTraits> g_observers =
LAZY_INSTANCE_INITIALIZER;
} // namespace
ApplicationStatusListener::ApplicationStatusListener(
const ApplicationStatusListener::ApplicationStateChangeCallback& callback)
: callback_(callback) {
DCHECK(!callback_.is_null());
g_observers.Get().AddObserver(this);
Java_ApplicationStatus_registerThreadSafeNativeApplicationStateListener(
AttachCurrentThread());
}
ApplicationStatusListener::~ApplicationStatusListener() {
g_observers.Get().RemoveObserver(this);
}
void ApplicationStatusListener::Notify(ApplicationState state) {
callback_.Run(state);
}
// static
void ApplicationStatusListener::NotifyApplicationStateChange(
ApplicationState state) {
g_observers.Get().Notify(FROM_HERE, &ApplicationStatusListener::Notify,
state);
}
// static
ApplicationState ApplicationStatusListener::GetState() {
return static_cast<ApplicationState>(
Java_ApplicationStatus_getStateForApplication(AttachCurrentThread()));
}
static void JNI_ApplicationStatus_OnApplicationStateChange(
JNIEnv* env,
const JavaParamRef<jclass>& clazz,
jint new_state) {
ApplicationState application_state = static_cast<ApplicationState>(new_state);
ApplicationStatusListener::NotifyApplicationStateChange(application_state);
}
} // namespace android
} // namespace base
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