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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/arc/instance_throttle/arc_boot_phase_throttle_observer.h"
#include "base/logging.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "chrome/browser/ash/arc/arc_util.h"
#include "chrome/browser/ash/arc/session/arc_session_manager.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/sessions/session_restore.h"
#include "chromeos/ash/experiences/arc/session/arc_bridge_service.h"
#include "chromeos/ash/experiences/arc/session/arc_service_manager.h"
namespace arc {
namespace {
// Try to throttle ARC |kThrottleArcDelay| after app.mojom is connected.
constexpr base::TimeDelta kThrottleArcDelay = base::Seconds(10);
void RemoveMojoObservers(ArcBootPhaseThrottleObserver* observer) {
auto* arc_service_manager = arc::ArcServiceManager::Get();
if (!arc_service_manager)
return;
arc_service_manager->arc_bridge_service()->intent_helper()->RemoveObserver(
observer);
arc_service_manager->arc_bridge_service()->app()->RemoveObserver(observer);
}
} // namespace
ArcBootPhaseThrottleObserver::ArcBootPhaseThrottleObserver()
: ThrottleObserver(kArcBootPhaseThrottleObserverName) {}
ArcBootPhaseThrottleObserver::~ArcBootPhaseThrottleObserver() = default;
void ArcBootPhaseThrottleObserver::StartObserving(
content::BrowserContext* context,
const ObserverStateChangedCallback& callback) {
ThrottleObserver::StartObserving(context, callback);
auto* session_manager = ArcSessionManager::Get();
DCHECK(session_manager);
session_manager->AddObserver(this);
SessionRestore::AddObserver(this);
// If app() and/or intent_helper() are already connected to the instance in
// the guest, the OnConnectionReady() function is synchronously called before
// returning from AddObserver. For more details, see
// chromeos/ash/experiences/arc/session/connection_holder.h especially its
// AddObserver() function.
auto* arc_service_manager = arc::ArcServiceManager::Get();
// ArcServiceManager and objects owned by the manager are created very early
// in `ChromeBrowserMainPartsAsh::PreMainMessageLoopRun()` too.
DCHECK(arc_service_manager);
arc_service_manager->arc_bridge_service()->app()->AddObserver(this);
arc_service_manager->arc_bridge_service()->intent_helper()->AddObserver(this);
}
void ArcBootPhaseThrottleObserver::StopObserving() {
RemoveMojoObservers(this);
SessionRestore::RemoveObserver(this);
auto* session_manager = ArcSessionManager::Get();
DCHECK(session_manager);
session_manager->RemoveObserver(this);
ThrottleObserver::StopObserving();
}
void ArcBootPhaseThrottleObserver::OnArcStarted() {
arc_is_booting_ = true;
MaybeSetActive();
}
void ArcBootPhaseThrottleObserver::OnArcInitialStart() {
arc_is_booting_ = false;
MaybeSetActive();
}
void ArcBootPhaseThrottleObserver::OnArcSessionRestarting() {
arc_is_booting_ = true;
MaybeSetActive();
}
void ArcBootPhaseThrottleObserver::OnSessionRestoreStartedLoadingTabs() {
session_restore_loading_ = true;
MaybeSetActive();
}
void ArcBootPhaseThrottleObserver::OnSessionRestoreFinishedLoadingTabs() {
session_restore_loading_ = false;
MaybeSetActive();
}
void ArcBootPhaseThrottleObserver::OnConnectionReady() {
auto* arc_service_manager = arc::ArcServiceManager::Get();
const bool app_connected =
arc_service_manager &&
arc_service_manager->arc_bridge_service()->app()->IsConnected();
const bool intent_helper_connected =
arc_service_manager &&
arc_service_manager->arc_bridge_service()->intent_helper()->IsConnected();
if (!app_connected || !intent_helper_connected)
return;
// Only the first OnConnectionReady() calls need to be monitored. Remove the
// observers now.
RemoveMojoObservers(this);
DVLOG(1)
<< "app.mojom and intent_helper.mojom are connected. Throttle ARC in "
<< kThrottleArcDelay;
base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE,
base::BindOnce(&ArcBootPhaseThrottleObserver::ThrottleArc,
weak_ptr_factory_.GetWeakPtr()),
kThrottleArcDelay);
}
// static
const base::TimeDelta&
ArcBootPhaseThrottleObserver::GetThrottleDelayForTesting() {
return kThrottleArcDelay;
}
void ArcBootPhaseThrottleObserver::ThrottleArc() {
DVLOG(1) << "Throttling ARC (reason: boot completed)";
arc_is_booting_ = false;
MaybeSetActive();
}
void ArcBootPhaseThrottleObserver::MaybeSetActive() {
if (!arc_is_booting_ || !*arc_is_booting_) {
// Skip other checks if ARC is not currently booting.
SetActive(false);
return;
}
auto* profile = Profile::FromBrowserContext(context());
const bool enabled_by_policy =
IsArcPlayStoreEnabledForProfile(profile) &&
IsArcPlayStoreEnabledPreferenceManagedForProfile(profile);
auto* session_manager = ArcSessionManager::Get();
DCHECK(session_manager);
const bool opt_in_boot =
!session_manager->skipped_terms_of_service_negotiation();
// ARC should be always be unthrottled during boot if ARC is enabled by
// managed policy, or if this is the opt-in boot. Else, only unthrottle ARC
// if a session restore is not currently taking place.
const bool always_unthrottle = enabled_by_policy || opt_in_boot;
const bool active = always_unthrottle || !session_restore_loading_;
SetActive(active);
}
} // namespace arc
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