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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/base_jni_headers/ApplicationStatus_jni.h"
- #include "base/callback.h"
- #include "base/lazy_instance.h"
- #include "base/metrics/user_metrics.h"
- #include "base/observer_list_threadsafe.h"
- #include "base/trace_event/base_tracing.h"
- #if BUILDFLAG(ENABLE_BASE_TRACING)
- #include "base/trace_event/application_state_proto_android.h" // no-presubmit-check
- #endif // BUILDFLAG(ENABLE_BASE_TRACING)
- namespace base {
- namespace android {
- namespace {
- class ApplicationStatusListenerImpl;
- struct LeakyLazyObserverListTraits
- : base::internal::LeakyLazyInstanceTraits<
- ObserverListThreadSafe<ApplicationStatusListenerImpl>> {
- static ObserverListThreadSafe<ApplicationStatusListenerImpl>* New(
- void* instance) {
- ObserverListThreadSafe<ApplicationStatusListenerImpl>* ret =
- base::internal::LeakyLazyInstanceTraits<ObserverListThreadSafe<
- ApplicationStatusListenerImpl>>::New(instance);
- // Leaky.
- ret->AddRef();
- return ret;
- }
- };
- LazyInstance<ObserverListThreadSafe<ApplicationStatusListenerImpl>,
- LeakyLazyObserverListTraits>
- g_observers = LAZY_INSTANCE_INITIALIZER;
- class ApplicationStatusListenerImpl : public ApplicationStatusListener {
- public:
- ApplicationStatusListenerImpl(
- const ApplicationStateChangeCallback& callback) {
- SetCallback(callback);
- g_observers.Get().AddObserver(this);
- Java_ApplicationStatus_registerThreadSafeNativeApplicationStateListener(
- AttachCurrentThread());
- }
- ~ApplicationStatusListenerImpl() override {
- g_observers.Get().RemoveObserver(this);
- }
- void SetCallback(const ApplicationStateChangeCallback& callback) override {
- DCHECK(!callback_);
- DCHECK(callback);
- callback_ = callback;
- }
- void Notify(ApplicationState state) override {
- if (callback_)
- callback_.Run(state);
- }
- private:
- ApplicationStateChangeCallback callback_;
- };
- } // namespace
- ApplicationStatusListener::ApplicationStatusListener() = default;
- ApplicationStatusListener::~ApplicationStatusListener() = default;
- // static
- std::unique_ptr<ApplicationStatusListener> ApplicationStatusListener::New(
- const ApplicationStateChangeCallback& callback) {
- return std::make_unique<ApplicationStatusListenerImpl>(callback);
- }
- // static
- void ApplicationStatusListener::NotifyApplicationStateChange(
- ApplicationState state) {
- TRACE_APPLICATION_STATE(state);
- switch (state) {
- case APPLICATION_STATE_UNKNOWN:
- case APPLICATION_STATE_HAS_DESTROYED_ACTIVITIES:
- break;
- case APPLICATION_STATE_HAS_RUNNING_ACTIVITIES:
- RecordAction(UserMetricsAction("Android.LifeCycle.HasRunningActivities"));
- break;
- case APPLICATION_STATE_HAS_PAUSED_ACTIVITIES:
- RecordAction(UserMetricsAction("Android.LifeCycle.HasPausedActivities"));
- break;
- case APPLICATION_STATE_HAS_STOPPED_ACTIVITIES:
- RecordAction(UserMetricsAction("Android.LifeCycle.HasStoppedActivities"));
- break;
- }
- g_observers.Get().Notify(FROM_HERE, &ApplicationStatusListenerImpl::Notify,
- state);
- }
- // static
- ApplicationState ApplicationStatusListener::GetState() {
- return static_cast<ApplicationState>(
- Java_ApplicationStatus_getStateForApplication(AttachCurrentThread()));
- }
- static void JNI_ApplicationStatus_OnApplicationStateChange(
- JNIEnv* env,
- jint new_state) {
- ApplicationState application_state = static_cast<ApplicationState>(new_state);
- ApplicationStatusListener::NotifyApplicationStateChange(application_state);
- }
- // static
- bool ApplicationStatusListener::HasVisibleActivities() {
- return Java_ApplicationStatus_hasVisibleActivities(AttachCurrentThread());
- }
- } // namespace android
- } // namespace base
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