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// Copyright 2016 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 "components/autofill/core/browser/geo/country_names.h"
#include <map>
#include <memory>
#include <utility>
#include "base/lazy_instance.h"
#include "base/memory/singleton.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/synchronization/lock.h"
#include "components/autofill/core/browser/geo/country_data.h"
namespace autofill {
namespace {
// A copy of the application locale string, which should be ready for
// CountryName's construction.
static base::LazyInstance<std::string>::DestructorAtExit g_application_locale =
LAZY_INSTANCE_INITIALIZER;
// Computes the value for CountryNames::common_names_.
std::map<std::string, std::string> GetCommonNames() {
std::map<std::string, std::string> common_names;
// Add 2- and 3-letter ISO country codes.
for (const std::string& country_code :
CountryDataMap::GetInstance()->country_codes()) {
common_names.insert(std::make_pair(country_code, country_code));
std::string iso3_country_code =
icu::Locale(nullptr, country_code.c_str()).getISO3Country();
// ICU list of countries can be out-of-date with CLDR.
if (!iso3_country_code.empty())
common_names.insert(std::make_pair(iso3_country_code, country_code));
}
// Add a few other common synonyms.
common_names.insert(std::make_pair("UNITED STATES OF AMERICA", "US"));
common_names.insert(std::make_pair("U.S.A.", "US"));
common_names.insert(std::make_pair("GREAT BRITAIN", "GB"));
common_names.insert(std::make_pair("UK", "GB"));
common_names.insert(std::make_pair("BRASIL", "BR"));
common_names.insert(std::make_pair("DEUTSCHLAND", "DE"));
#if defined(OS_IOS)
// iOS uses the Foundation API to get the localized display name, in which
// "China" is named "Chine mainland".
common_names.insert(std::make_pair("CHINA", "CN"));
#endif
return common_names;
}
} // namespace
// static
CountryNames* CountryNames::GetInstance() {
return base::Singleton<CountryNames>::get();
}
// static
void CountryNames::SetLocaleString(const std::string& locale) {
DCHECK(!locale.empty());
// Application locale should never be empty. The empty value of
// |g_application_locale| means that it has not been initialized yet.
std::string* storage = g_application_locale.Pointer();
if (storage->empty()) {
*storage = locale;
}
// TODO(crbug.com/579971) CountryNames currently cannot adapt to changed
// locale without Chrome's restart.
}
CountryNames::CountryNames(const std::string& locale_name)
: application_locale_name_(locale_name),
default_locale_name_(std::string("en_US")),
country_names_for_default_locale_(default_locale_name_),
country_names_for_application_locale_(application_locale_name_),
common_names_(GetCommonNames()),
localized_country_names_cache_(10) {}
CountryNames::CountryNames() : CountryNames(g_application_locale.Get()) {
DCHECK(!g_application_locale.Get().empty());
}
CountryNames::~CountryNames() = default;
const std::string CountryNames::GetCountryCode(
const std::u16string& country) const {
// First, check common country names, including 2- and 3-letter country codes.
std::string country_utf8 = base::UTF16ToUTF8(base::ToUpperASCII(country));
const auto result = common_names_.find(country_utf8);
if (result != common_names_.end())
return result->second;
// Next, check country names localized to the current locale.
std::string country_code =
country_names_for_application_locale_.GetCountryCode(country);
if (!country_code.empty())
return country_code;
// Finally, check country names localized to US English, unless done already.
return country_names_for_default_locale_.GetCountryCode(country);
}
const std::string CountryNames::GetCountryCodeForLocalizedCountryName(
const std::u16string& country,
const std::string& locale_name) {
// Do an unconditional lookup using the default and app_locale.
// Chances are that the name of the country matches the localized one.
std::string result = GetCountryCode(country);
// Terminate if a country code was determined or if the locale matches the
// default ones.
if (!result.empty() || locale_name == application_locale_name_ ||
locale_name == default_locale_name_ || locale_name.empty()) {
return result;
}
// Acquire a lock for the localization cache.
base::AutoLock lock(localized_country_names_cache_lock_);
// Lookup the CountryName for the locale in the cache.
auto iter = localized_country_names_cache_.Get(locale_name);
if (iter != localized_country_names_cache_.end())
return iter->second.GetCountryCode(country);
CountryNamesForLocale country_names_for_locale(locale_name);
result = country_names_for_locale.GetCountryCode(country);
// Put the country names for the locale into the cache.
localized_country_names_cache_.Put(locale_name,
std::move(country_names_for_locale));
return result;
}
} // namespace autofill
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