| // 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 <string> |
| |
| #include "base/i18n/rtl.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 "chromeos/settings/timezone_settings.h" |
| #include "grit/generated_resources.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); |
| } |
| }; |
| |
| static base::LazyInstance<base::Lock>::Leaky |
| g_timezone_bundle_lock = LAZY_INSTANCE_INITIALIZER; |
| |
| // Returns an exemplary city in the given timezone. |
| string16 GetExemplarCity(const icu::TimeZone& zone) { |
| // TODO(jungshik): After upgrading to ICU 4.6, use U_ICUDATA_ZONE |
| static const char* zone_bundle_name = NULL; |
| |
| // These will be leaked at the end. |
| static UResourceBundle *zone_bundle = NULL; |
| static UResourceBundle *zone_strings = NULL; |
| |
| UErrorCode status = U_ZERO_ERROR; |
| { |
| base::AutoLock lock(g_timezone_bundle_lock.Get()); |
| if (zone_bundle == NULL) |
| zone_bundle = ures_open(zone_bundle_name, uloc_getDefault(), &status); |
| |
| if (zone_strings == NULL) |
| zone_strings = ures_getByKey(zone_bundle, "zone_strings", NULL, &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 '/'. |
| ReplaceSubstringsAfterOffset(&zone_id_str, 0, "/", ":"); |
| scoped_ptr_malloc<UResourceBundle, UResClose> zone_item( |
| ures_getByKey(zone_strings, zone_id_str.c_str(), NULL, &status)); |
| icu::UnicodeString city; |
| if (!U_FAILURE(status)) { |
| city = icu::ures_getUnicodeStringByKey(zone_item.get(), "ec", &status); |
| if (U_SUCCESS(status)) |
| return string16(city.getBuffer(), city.length()); |
| } |
| |
| // Fallback case in case of failure. |
| 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 ' '. |
| ReplaceSubstringsAfterOffset(&zone_id_str, 0, "_", " "); |
| return ASCIIToUTF16(zone_id_str); |
| } |
| |
| // Gets the given timezone's name for visualization. |
| 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 name; |
| timezone.getDisplayName(dst_offset != 0, icu::TimeZone::LONG, name); |
| string16 result(l10n_util::GetStringFUTF16( |
| IDS_OPTIONS_SETTINGS_TIMEZONE_DISPLAY_TEMPLATE, ASCIIToUTF16(offset_str), |
| string16(name.getBuffer(), name.length()), GetExemplarCity(timezone))); |
| base::i18n::AdjustStringForLocaleDirection(&result); |
| return result; |
| } |
| |
| } // namespace |
| |
| namespace chromeos { |
| namespace system { |
| |
| // Creates a list of pairs of each timezone's ID and name. |
| scoped_ptr<base::ListValue> GetTimezoneList() { |
| const std::vector<icu::TimeZone*> &timezones = |
| chromeos::system::TimezoneSettings::GetInstance()->GetTimezoneList(); |
| scoped_ptr<base::ListValue> timezoneList(new base::ListValue()); |
| for (std::vector<icu::TimeZone*>::const_iterator iter = timezones.begin(); |
| iter != timezones.end(); ++iter) { |
| const icu::TimeZone* timezone = *iter; |
| base::ListValue* option = new base::ListValue(); |
| option->Append(new base::StringValue( |
| chromeos::system::TimezoneSettings::GetTimezoneID(*timezone))); |
| option->Append(new base::StringValue(GetTimezoneName(*timezone))); |
| timezoneList->Append(option); |
| } |
| return timezoneList.Pass(); |
| } |
| |
| } // namespace system |
| } // namespace chromeos |