| // Copyright 2013 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/timezone_util.h" |
| |
| #include <stddef.h> |
| |
| #include <memory> |
| #include <string> |
| #include <utility> |
| |
| #include "base/command_line.h" |
| #include "base/i18n/rtl.h" |
| #include "base/i18n/unicodestring.h" |
| #include "base/lazy_instance.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "base/synchronization/lock.h" |
| #include "base/values.h" |
| #include "chrome/browser/browser_process.h" |
| #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h" |
| #include "chrome/browser/chromeos/profiles/profile_helper.h" |
| #include "chrome/browser/chromeos/settings/cros_settings.h" |
| #include "chrome/browser/chromeos/system/timezone_resolver_manager.h" |
| #include "chrome/browser/profiles/profile_manager.h" |
| #include "chrome/common/pref_names.h" |
| #include "chrome/grit/generated_resources.h" |
| #include "chromeos/constants/chromeos_switches.h" |
| #include "chromeos/settings/timezone_settings.h" |
| #include "chromeos/timezone/timezone_request.h" |
| #include "chromeos/tpm/install_attributes.h" |
| #include "components/policy/proto/chrome_device_policy.pb.h" |
| #include "components/prefs/pref_service.h" |
| #include "components/user_manager/user.h" |
| #include "components/user_manager/user_manager.h" |
| #include "third_party/icu/source/common/unicode/ures.h" |
| #include "third_party/icu/source/common/unicode/utypes.h" |
| #include "third_party/icu/source/i18n/unicode/calendar.h" |
| #include "third_party/icu/source/i18n/unicode/timezone.h" |
| #include "ui/base/l10n/l10n_util.h" |
| |
| namespace { |
| |
| struct UResClose { |
| inline void operator() (UResourceBundle* b) const { |
| ures_close(b); |
| } |
| }; |
| |
| base::LazyInstance<base::Lock>::Leaky g_timezone_bundle_lock = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| // Returns an exemplary city in the given timezone. |
| base::string16 GetExemplarCity(const icu::TimeZone& zone) { |
| // These will be leaked at the end. |
| static UResourceBundle* zone_bundle = nullptr; |
| static UResourceBundle* zone_strings = nullptr; |
| |
| UErrorCode status = U_ZERO_ERROR; |
| { |
| // TODO(jungshik): After upgrading to ICU 4.6, use U_ICUDATA_ZONE in |
| // ures_open(). |
| base::AutoLock lock(g_timezone_bundle_lock.Get()); |
| if (!zone_bundle) |
| zone_bundle = ures_open(nullptr, uloc_getDefault(), &status); |
| |
| if (!zone_strings) { |
| zone_strings = |
| ures_getByKey(zone_bundle, "zone_strings", nullptr, &status); |
| } |
| } |
| |
| icu::UnicodeString zone_id; |
| zone.getID(zone_id); |
| std::string zone_id_str; |
| zone_id.toUTF8String(zone_id_str); |
| |
| // Resource keys for timezones use ':' in place of '/'. |
| base::ReplaceSubstringsAfterOffset(&zone_id_str, 0, "/", ":"); |
| std::unique_ptr<UResourceBundle, UResClose> zone_item( |
| ures_getByKey(zone_strings, zone_id_str.c_str(), nullptr, &status)); |
| icu::UnicodeString city; |
| if (!U_FAILURE(status)) { |
| city = icu::ures_getUnicodeStringByKey(zone_item.get(), "ec", &status); |
| if (U_SUCCESS(status)) |
| return base::i18n::UnicodeStringToString16(city); |
| } |
| |
| // Fallback case in case of failure. |
| base::ReplaceSubstringsAfterOffset(&zone_id_str, 0, ":", "/"); |
| // Take the last component of a timezone id (e.g. 'Baz' in 'Foo/Bar/Baz'). |
| // Depending on timezones, keeping all but the 1st component |
| // (e.g. Bar/Baz) may be better, but our current list does not have |
| // any timezone for which that's the case. |
| std::string::size_type slash_pos = zone_id_str.rfind('/'); |
| if (slash_pos != std::string::npos && slash_pos < zone_id_str.size()) |
| zone_id_str.erase(0, slash_pos + 1); |
| // zone id has '_' in place of ' '. |
| base::ReplaceSubstringsAfterOffset(&zone_id_str, 0, "_", " "); |
| return base::ASCIIToUTF16(zone_id_str); |
| } |
| |
| // Gets the given timezone's name for visualization. |
| base::string16 GetTimezoneName(const icu::TimeZone& timezone) { |
| // Instead of using the raw_offset, use the offset in effect now. |
| // For instance, US Pacific Time, the offset shown will be -7 in summer |
| // while it'll be -8 in winter. |
| int raw_offset, dst_offset; |
| UDate now = icu::Calendar::getNow(); |
| UErrorCode status = U_ZERO_ERROR; |
| timezone.getOffset(now, false, raw_offset, dst_offset, status); |
| DCHECK(U_SUCCESS(status)); |
| int offset = raw_offset + dst_offset; |
| // |offset| is in msec. |
| int minute_offset = std::abs(offset) / 60000; |
| int hour_offset = minute_offset / 60; |
| int min_remainder = minute_offset % 60; |
| // Some timezones have a non-integral hour offset. So, we need to use hh:mm |
| // form. |
| std::string offset_str = base::StringPrintf(offset >= 0 ? |
| "UTC+%d:%02d" : "UTC-%d:%02d", hour_offset, min_remainder); |
| |
| // TODO(jungshik): When coming up with a better list of timezones, we also |
| // have to come up with better 'display' names. One possibility is to list |
| // multiple cities (e.g. "Los Angeles, Vancouver .." in the order of |
| // the population of a country the city belongs to.). |
| // We can also think of using LONG_GENERIC or LOCATION once we upgrade |
| // to ICU 4.6. |
| // In the meantime, we use "LONG" name with "Exemplar City" to distinguish |
| // multiple timezones with the same "LONG" name but with different |
| // rules (e.g. US Mountain Time in Denver vs Phoenix). |
| icu::UnicodeString id; |
| icu::UnicodeString name; |
| timezone.getID(id); |
| if (id == icu::UnicodeString(chromeos::system::kUTCTimezoneName)) { |
| name = icu::UnicodeString( |
| l10n_util::GetStringUTF8(IDS_OPTIONS_SETTINGS_TIMEZONE_DISPLAY_NAME_UTC) |
| .c_str()); |
| } else { |
| timezone.getDisplayName(dst_offset != 0, icu::TimeZone::LONG, name); |
| } |
| base::string16 result(l10n_util::GetStringFUTF16( |
| IDS_OPTIONS_SETTINGS_TIMEZONE_DISPLAY_TEMPLATE, |
| base::ASCIIToUTF16(offset_str), base::i18n::UnicodeStringToString16(name), |
| GetExemplarCity(timezone))); |
| base::i18n::AdjustStringForLocaleDirection(&result); |
| return result; |
| } |
| |
| // Returns true if the given user is allowed to set the system timezone - that |
| // is, the single timezone at TimezoneSettings::GetInstance()->GetTimezone(), |
| // which is also stored in a file at /var/lib/timezone/localtime. |
| bool CanSetSystemTimezone(const user_manager::User* user) { |
| if (!user->is_logged_in()) |
| return false; |
| |
| switch (user->GetType()) { |
| case user_manager::USER_TYPE_REGULAR: |
| case user_manager::USER_TYPE_SUPERVISED: |
| case user_manager::USER_TYPE_KIOSK_APP: |
| case user_manager::USER_TYPE_ARC_KIOSK_APP: |
| case user_manager::USER_TYPE_ACTIVE_DIRECTORY: |
| return true; |
| |
| case user_manager::USER_TYPE_GUEST: |
| case user_manager::USER_TYPE_PUBLIC_ACCOUNT: |
| case user_manager::USER_TYPE_CHILD: |
| return false; |
| |
| case user_manager::NUM_USER_TYPES: |
| NOTREACHED(); |
| |
| // No default case means the compiler makes sure we handle new types. |
| } |
| NOTREACHED(); |
| return false; |
| } |
| |
| } // namespace |
| |
| namespace chromeos { |
| namespace system { |
| |
| base::string16 GetCurrentTimezoneName() { |
| return GetTimezoneName(TimezoneSettings::GetInstance()->GetTimezone()); |
| } |
| |
| // Creates a list of pairs of each timezone's ID and name. |
| std::unique_ptr<base::ListValue> GetTimezoneList() { |
| const auto& timezones = TimezoneSettings::GetInstance()->GetTimezoneList(); |
| auto timezone_list = std::make_unique<base::ListValue>(); |
| for (const auto& timezone : timezones) { |
| auto option = std::make_unique<base::ListValue>(); |
| option->AppendString(TimezoneSettings::GetTimezoneID(*timezone)); |
| option->AppendString(GetTimezoneName(*timezone)); |
| timezone_list->Append(std::move(option)); |
| } |
| return timezone_list; |
| } |
| |
| bool HasSystemTimezonePolicy() { |
| if (!chromeos::InstallAttributes::Get()->IsEnterpriseManaged()) |
| return false; |
| |
| std::string policy_timezone; |
| if (CrosSettings::Get()->GetString(kSystemTimezonePolicy, &policy_timezone) && |
| !policy_timezone.empty()) { |
| VLOG(1) << "Refresh TimeZone: TimeZone settings are overridden" |
| << " by DevicePolicy."; |
| return true; |
| } |
| return false; |
| } |
| |
| bool IsTimezonePrefsManaged(const std::string& pref_name) { |
| DCHECK(pref_name == chromeos::kSystemTimezone || |
| pref_name == prefs::kUserTimezone || |
| pref_name == prefs::kResolveTimezoneByGeolocationMethod); |
| |
| std::string policy_timezone; |
| if (CrosSettings::Get()->GetString(kSystemTimezonePolicy, &policy_timezone) && |
| !policy_timezone.empty()) { |
| return true; |
| } |
| |
| // System time zone preference is managed only if kSystemTimezonePolicy |
| // present, which we checked above. |
| // |
| // kSystemTimezoneAutomaticDetectionPolicy (see below) controls only user |
| // time zone preference, and user time zone resolve preference. |
| if (pref_name == chromeos::kSystemTimezone) |
| return false; |
| |
| const PrefService* local_state = g_browser_process->local_state(); |
| if (!local_state->IsManagedPreference( |
| prefs::kSystemTimezoneAutomaticDetectionPolicy)) { |
| return false; |
| } |
| |
| int resolve_policy_value = |
| local_state->GetInteger(prefs::kSystemTimezoneAutomaticDetectionPolicy); |
| |
| switch (resolve_policy_value) { |
| case enterprise_management::SystemTimezoneProto::USERS_DECIDE: |
| return false; |
| case enterprise_management::SystemTimezoneProto::DISABLED: |
| // This only disables resolving. |
| return pref_name == prefs::kResolveTimezoneByGeolocationMethod; |
| case enterprise_management::SystemTimezoneProto::IP_ONLY: |
| case enterprise_management::SystemTimezoneProto::SEND_WIFI_ACCESS_POINTS: |
| case enterprise_management::SystemTimezoneProto::SEND_ALL_LOCATION_INFO: |
| return true; |
| } |
| // Default for unknown policy value. |
| NOTREACHED() << "Unrecognized policy value: " << resolve_policy_value; |
| return true; |
| } |
| |
| void ApplyTimeZone(const TimeZoneResponseData* timezone) { |
| if (!g_browser_process->platform_part() |
| ->GetTimezoneResolverManager() |
| ->ShouldApplyResolvedTimezone()) { |
| return; |
| } |
| |
| if (timezone->timeZoneId.empty()) |
| return; |
| |
| VLOG(1) << "Refresh TimeZone: setting timezone to '" << timezone->timeZoneId |
| << "'"; |
| |
| if (PerUserTimezoneEnabled()) { |
| const user_manager::UserManager* user_manager = |
| user_manager::UserManager::Get(); |
| const user_manager::User* primary_user = user_manager->GetPrimaryUser(); |
| |
| if (primary_user) { |
| Profile* profile = ProfileHelper::Get()->GetProfileByUser(primary_user); |
| // profile can be NULL only if user has logged in, but profile has not |
| // been initialized yet. Ignore delayed time zone update until user |
| // preferences are initialized. |
| if (!profile) |
| return; |
| |
| profile->GetPrefs()->SetString(prefs::kUserTimezone, |
| timezone->timeZoneId); |
| // For non-enterprise device, chromeos::Preferences::ApplyPreferences() |
| // will automatically change system timezone because user is primary. |
| // But it may not happen for enterprise device, as policy may prevent |
| // user from changing device time zone manually. |
| // That is the reason we always update system time zone here. |
| TimezoneSettings::GetInstance()->SetTimezoneFromID( |
| base::UTF8ToUTF16(timezone->timeZoneId)); |
| } else { |
| SetSystemAndSigninScreenTimezone(timezone->timeZoneId); |
| } |
| } else { |
| TimezoneSettings::GetInstance()->SetTimezoneFromID( |
| base::UTF8ToUTF16(timezone->timeZoneId)); |
| } |
| } |
| |
| void UpdateSystemTimezone(Profile* profile) { |
| if (IsTimezonePrefsManaged(prefs::kUserTimezone)) { |
| VLOG(1) << "Ignoring user timezone change, because timezone is enterprise " |
| "managed."; |
| return; |
| } |
| |
| const user_manager::UserManager* user_manager = |
| user_manager::UserManager::Get(); |
| const user_manager::User* user = |
| ProfileHelper::Get()->GetUserByProfile(profile); |
| |
| const AccountId owner(user_manager->GetOwnerAccountId()); |
| const bool user_is_owner = |
| owner.is_valid() && (owner == user->GetAccountId()); |
| |
| const std::string value = |
| profile->GetPrefs()->GetString(prefs::kUserTimezone); |
| if (user_is_owner) { |
| g_browser_process->local_state()->SetString(prefs::kSigninScreenTimezone, |
| value); |
| } |
| |
| if (user_manager->GetPrimaryUser() == user && PerUserTimezoneEnabled()) |
| SetSystemTimezone(user, value); |
| } |
| |
| bool SetSystemTimezone(const user_manager::User* user, |
| const std::string& timezone) { |
| DCHECK(user); |
| if (!CanSetSystemTimezone(user)) |
| return false; |
| TimezoneSettings::GetInstance()->SetTimezoneFromID( |
| base::UTF8ToUTF16(timezone)); |
| return true; |
| } |
| |
| void SetSystemAndSigninScreenTimezone(const std::string& timezone) { |
| if (timezone.empty()) |
| return; |
| |
| g_browser_process->local_state()->SetString(prefs::kSigninScreenTimezone, |
| timezone); |
| |
| std::string current_timezone_id; |
| CrosSettings::Get()->GetString(kSystemTimezone, ¤t_timezone_id); |
| if (current_timezone_id != timezone) { |
| TimezoneSettings::GetInstance()->SetTimezoneFromID( |
| base::UTF8ToUTF16(timezone)); |
| } |
| } |
| |
| bool PerUserTimezoneEnabled() { |
| return !base::CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kDisablePerUserTimezone); |
| } |
| |
| void SetTimezoneFromUI(Profile* profile, const std::string& timezone_id) { |
| const user_manager::User* user = |
| ProfileHelper::Get()->GetUserByProfile(profile); |
| |
| if (!PerUserTimezoneEnabled()) { |
| SetSystemTimezone(user, timezone_id); |
| return; |
| } |
| |
| if (ProfileHelper::IsSigninProfile(profile)) { |
| SetSystemAndSigninScreenTimezone(timezone_id); |
| return; |
| } |
| |
| if (ProfileHelper::IsEphemeralUserProfile(profile)) { |
| SetSystemTimezone(user, timezone_id); |
| return; |
| } |
| |
| Profile* primary_profile = ProfileManager::GetPrimaryUserProfile(); |
| if (primary_profile && profile->IsSameProfile(primary_profile)) { |
| profile->GetPrefs()->SetString(prefs::kUserTimezone, timezone_id); |
| } |
| // Time zone UI should be blocked for non-primary users. |
| NOTREACHED(); |
| } |
| |
| bool FineGrainedTimeZoneDetectionEnabled() { |
| return !base::CommandLine::ForCurrentProcess()->HasSwitch( |
| switches::kDisableFineGrainedTimeZoneDetection); |
| } |
| |
| } // namespace system |
| } // namespace chromeos |