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// Copyright 2015 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 "chrome/browser/chromeos/system/system_clock.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos.h"
#include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos_factory.h"
#include "chrome/browser/chromeos/profiles/profile_helper.h"
#include "chrome/browser/chromeos/settings/cros_settings.h"
#include "chrome/browser/chromeos/system/system_clock_observer.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/common/pref_names.h"
#include "chromeos/login/login_state.h"
#include "chromeos/settings/cros_settings_names.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_service.h"
#include "components/user_manager/user.h"
#include "components/user_manager/user_manager.h"
#include "content/public/browser/notification_service.h"
namespace chromeos {
namespace system {
namespace {
void SetShouldUse24HourClock(bool use_24_hour_clock) {
user_manager::User* const user =
user_manager::UserManager::Get()->GetActiveUser();
CHECK(user);
Profile* const profile = ProfileHelper::Get()->GetProfileByUser(user);
if (!profile)
return; // May occur in tests or if not running on a device.
OwnerSettingsServiceChromeOS* const service =
OwnerSettingsServiceChromeOSFactory::GetForBrowserContext(profile);
CHECK(service);
service->SetBoolean(kSystemUse24HourClock, use_24_hour_clock);
}
} // anonymous namespace
SystemClock::SystemClock()
: user_pod_was_focused_(false),
last_focused_pod_hour_clock_type_(base::k12HourClock),
user_profile_(NULL),
device_settings_observer_(CrosSettings::Get()->AddSettingsObserver(
kSystemUse24HourClock,
base::Bind(&SystemClock::OnSystemPrefChanged,
base::Unretained(this)))) {
if (LoginState::IsInitialized())
LoginState::Get()->AddObserver(this);
// Register notifications on construction so that events such as
// PROFILE_CREATED do not get missed if they happen before Initialize().
registrar_.reset(new content::NotificationRegistrar);
if (!LoginState::IsInitialized() ||
LoginState::Get()->GetLoggedInUserType() ==
LoginState::LOGGED_IN_USER_NONE) {
registrar_->Add(this, chrome::NOTIFICATION_SESSION_STARTED,
content::NotificationService::AllSources());
}
registrar_->Add(this, chrome::NOTIFICATION_PROFILE_CREATED,
content::NotificationService::AllSources());
registrar_->Add(this, chrome::NOTIFICATION_PROFILE_DESTROYED,
content::NotificationService::AllSources());
registrar_->Add(this, chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
content::NotificationService::AllSources());
user_manager::UserManager::Get()->AddSessionStateObserver(this);
}
SystemClock::~SystemClock() {
registrar_.reset();
device_settings_observer_.reset();
if (LoginState::IsInitialized())
LoginState::Get()->RemoveObserver(this);
if (user_manager::UserManager::IsInitialized())
user_manager::UserManager::Get()->RemoveSessionStateObserver(this);
}
// LoginState::Observer overrides.
void SystemClock::LoggedInStateChanged() {
// It apparently sometimes takes a while after login before the current user
// is recognized as the owner. Make sure that the system-wide clock setting
// is updated when the recognition eventually happens (crbug.com/278601).
if (user_manager::UserManager::Get()->IsCurrentUserOwner())
SetShouldUse24HourClock(ShouldUse24HourClock());
}
// content::NotificationObserver implementation.
void SystemClock::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED: {
UpdateClockType();
break;
}
case chrome::NOTIFICATION_PROFILE_CREATED: {
OnActiveProfileChanged(content::Source<Profile>(source).ptr());
registrar_->Remove(this, chrome::NOTIFICATION_PROFILE_CREATED,
content::NotificationService::AllSources());
break;
}
case chrome::NOTIFICATION_PROFILE_DESTROYED: {
if (OnProfileDestroyed(content::Source<Profile>(source).ptr())) {
registrar_->Remove(this, chrome::NOTIFICATION_PROFILE_DESTROYED,
content::NotificationService::AllSources());
}
break;
}
case chrome::NOTIFICATION_SESSION_STARTED: {
OnActiveProfileChanged(ProfileManager::GetActiveUserProfile());
break;
}
default:
NOTREACHED();
}
}
void SystemClock::ActiveUserChanged(const user_manager::User* /*user*/) {
UpdateClockType();
}
void SystemClock::AddObserver(SystemClockObserver* observer) {
observer_list_.AddObserver(observer);
}
void SystemClock::RemoveObserver(SystemClockObserver* observer) {
observer_list_.RemoveObserver(observer);
}
void SystemClock::OnActiveProfileChanged(Profile* profile) {
user_profile_ = profile;
PrefService* prefs = profile->GetPrefs();
user_pref_registrar_.reset(new PrefChangeRegistrar);
user_pref_registrar_->Init(prefs);
user_pref_registrar_->Add(
prefs::kUse24HourClock,
base::Bind(&SystemClock::UpdateClockType, base::Unretained(this)));
}
bool SystemClock::OnProfileDestroyed(Profile* profile) {
if (profile != user_profile_)
return false;
user_pref_registrar_.reset();
user_profile_ = NULL;
return true;
}
void SystemClock::SetLastFocusedPodHourClockType(
base::HourClockType hour_clock_type) {
user_pod_was_focused_ = true;
last_focused_pod_hour_clock_type_ = hour_clock_type;
UpdateClockType();
}
bool SystemClock::ShouldUse24HourClock() const {
// On login screen and in guest mode owner default is used for
// kUse24HourClock preference.
const chromeos::LoginState::LoggedInUserType status =
LoginState::IsInitialized() ? LoginState::Get()->GetLoggedInUserType()
: LoginState::LOGGED_IN_USER_NONE;
if (status == LoginState::LOGGED_IN_USER_NONE && user_pod_was_focused_)
return last_focused_pod_hour_clock_type_ == base::k24HourClock;
const CrosSettings* const cros_settings = CrosSettings::Get();
bool system_use_24_hour_clock = true;
const bool system_value_found = cros_settings->GetBoolean(
kSystemUse24HourClock, &system_use_24_hour_clock);
if ((status == LoginState::LOGGED_IN_USER_NONE) || !user_pref_registrar_) {
return (system_value_found
? system_use_24_hour_clock
: (base::GetHourClockType() == base::k24HourClock));
}
const PrefService::Preference* user_pref =
user_pref_registrar_->prefs()->FindPreference(prefs::kUse24HourClock);
if (status == LoginState::LOGGED_IN_USER_GUEST &&
user_pref->IsDefaultValue()) {
return (system_value_found
? system_use_24_hour_clock
: (base::GetHourClockType() == base::k24HourClock));
}
user_manager::User* active_user =
user_manager::UserManager::Get()->GetActiveUser();
if (active_user) {
Profile* user_profile = ProfileHelper::Get()->GetProfileByUser(active_user);
if (user_profile) {
user_pref =
user_profile->GetPrefs()->FindPreference(prefs::kUse24HourClock);
}
}
bool use_24_hour_clock = true;
user_pref->GetValue()->GetAsBoolean(&use_24_hour_clock);
return use_24_hour_clock;
}
void SystemClock::OnSystemPrefChanged() {
UpdateClockType();
}
void SystemClock::UpdateClockType() {
// This also works for enterprise-managed devices because they never have
// a local owner.
if (user_manager::UserManager::Get()->IsCurrentUserOwner())
SetShouldUse24HourClock(ShouldUse24HourClock());
FOR_EACH_OBSERVER(SystemClockObserver, observer_list_,
OnSystemClockChanged(this));
}
} // namespace system
} // namespace chromeos
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