ladybird/Libraries/LibUnicode/UnicodeKeywords.cpp

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/*
* Copyright (c) 2024-2025, Tim Flynn <trflynn89@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/NeverDestroyed.h>
#include <AK/QuickSort.h>
#include <AK/ScopeGuard.h>
#include <LibUnicode/DateTimeFormat.h>
#include <LibUnicode/ICU.h>
#include <LibUnicode/UnicodeKeywords.h>
#include <unicode/calendar.h>
#include <unicode/coll.h>
#include <unicode/locid.h>
#include <unicode/numsys.h>
#include <unicode/ucurr.h>
namespace Unicode {
Vector<Utf16String> available_keyword_values(Utf16View locale, Utf16View key)
{
if (key == "ca"sv)
return available_calendars(locale);
if (key == "co"sv)
return available_collations(locale);
if (key == "hc"sv)
return available_hour_cycles(locale);
if (key == "kf"sv)
return available_collation_case_orderings();
if (key == "kn"sv)
return available_collation_numeric_orderings();
if (key == "nu"sv)
return available_number_systems(locale);
TODO();
}
static bool is_available_calendar(char const* value, size_t value_length)
{
// "islamic" and "islamic-rgsa" are deprecated calendar types that DateTimeFormat resolves to other calendars,
// so they should not be advertised as available.
return !StringView { value, value_length }.is_one_of("islamic"sv, "islamic-rgsa"sv);
}
Vector<Utf16String> const& available_calendars()
{
static NeverDestroyed<Vector<Utf16String>> calendars { []() -> Vector<Utf16String> {
auto calendars = available_calendars(Utf16View { "und"sv });
quick_sort(calendars);
return calendars;
}() };
return *calendars;
}
Vector<Utf16String> available_calendars(Utf16View locale)
{
UErrorCode status = U_ZERO_ERROR;
auto locale_data = LocaleData::for_locale(locale.bytes());
if (!locale_data.has_value())
return {};
auto keywords = adopt_own_if_nonnull(icu::Calendar::getKeywordValuesForLocale("calendar", locale_data->locale(), 0, status));
if (icu_failure(status))
return {};
Vector<Utf16String> result;
while (true) {
i32 length = 0;
auto const* value = keywords->next(&length, status);
if (icu_failure(status) || value == nullptr)
break;
if (!is_available_calendar(value, static_cast<size_t>(length)))
continue;
if (auto const* bcp47_value = uloc_toUnicodeLocaleType("ca", value))
result.append(Utf16String::from_ascii_without_validation(StringView { bcp47_value, strlen(bcp47_value) }.bytes()));
}
return result;
}
Vector<Utf16String> const& available_currencies()
{
static NeverDestroyed<Vector<Utf16String>> currencies { []() -> Vector<Utf16String> {
UErrorCode status = U_ZERO_ERROR;
auto* currencies = ucurr_openISOCurrencies(UCURR_ALL, &status);
ScopeGuard guard { [&]() { uenum_close(currencies); } };
if (icu_failure(status))
return {};
Vector<Utf16String> result;
while (true) {
i32 length = 0;
char const* next = uenum_next(currencies, &length, &status);
if (icu_failure(status))
return {};
if (next == nullptr)
break;
// https://unicode-org.atlassian.net/browse/ICU-21687
if (StringView currency { next, static_cast<size_t>(length) }; currency != "LSM"sv)
result.append(Utf16String::from_utf8(currency));
}
quick_sort(result);
return result;
}() };
return *currencies;
}
Vector<Utf16String> const& available_collation_case_orderings()
{
static NeverDestroyed<Vector<Utf16String>> case_orderings { [] {
return Vector<Utf16String> {
Utf16String::from_ascii_without_validation("false"sv.bytes()),
Utf16String::from_ascii_without_validation("lower"sv.bytes()),
Utf16String::from_ascii_without_validation("upper"sv.bytes()),
};
}() };
return *case_orderings;
}
Vector<Utf16String> const& available_collation_numeric_orderings()
{
static NeverDestroyed<Vector<Utf16String>> numeric_orderings { [] {
return Vector<Utf16String> {
Utf16String::from_ascii_without_validation("false"sv.bytes()),
Utf16String::from_ascii_without_validation("true"sv.bytes()),
};
}() };
return *numeric_orderings;
}
Vector<Utf16String> const& available_collations()
{
static NeverDestroyed<Vector<Utf16String>> collations { []() -> Vector<Utf16String> {
UErrorCode status = U_ZERO_ERROR;
auto keywords = adopt_own_if_nonnull(icu::Collator::getKeywordValues("collation", status));
if (icu_failure(status))
return {};
Vector<Utf16String> collations;
while (true) {
i32 length = 0;
auto const* value = keywords->next(&length, status);
if (icu_failure(status) || value == nullptr)
break;
// https://tc39.es/ecma402/#sec-properties-of-intl-collator-instances
// the values "standard" and "search" are not allowed
if (StringView { value, static_cast<size_t>(length) }.is_one_of("standard"sv, "search"sv))
continue;
if (auto const* bcp47_value = uloc_toUnicodeLocaleType("co", value))
collations.append(Utf16String::from_ascii_without_validation(StringView { bcp47_value, strlen(bcp47_value) }.bytes()));
}
quick_sort(collations);
return collations;
}() };
return *collations;
}
Vector<Utf16String> available_collations(Utf16View locale)
{
UErrorCode status = U_ZERO_ERROR;
auto locale_data = LocaleData::for_locale(locale.bytes());
if (!locale_data.has_value())
return {};
auto keywords = adopt_own_if_nonnull(icu::Collator::getKeywordValuesForLocale("collation", locale_data->locale(), true, status));
if (icu_failure(status))
return {};
Vector<Utf16String> collations;
while (true) {
i32 length = 0;
auto const* value = keywords->next(&length, status);
if (icu_failure(status) || value == nullptr)
break;
// https://tc39.es/ecma402/#sec-properties-of-intl-collator-instances
// the values "standard" and "search" are not allowed
if (StringView { value, static_cast<size_t>(length) }.is_one_of("standard"sv, "search"sv))
continue;
if (auto const* bcp47_value = uloc_toUnicodeLocaleType("co", value))
collations.append(Utf16String::from_ascii_without_validation(StringView { bcp47_value, strlen(bcp47_value) }.bytes()));
}
auto default_collation = Utf16String::from_ascii_without_validation("default"sv.bytes());
if (!collations.contains_slow(default_collation))
collations.prepend(default_collation);
return collations;
}
Vector<Utf16String> const& available_hour_cycles()
{
static NeverDestroyed<Vector<Utf16String>> hour_cycles { [] {
return Vector<Utf16String> {
Utf16String::from_ascii_without_validation("h11"sv.bytes()),
Utf16String::from_ascii_without_validation("h12"sv.bytes()),
Utf16String::from_ascii_without_validation("h23"sv.bytes()),
Utf16String::from_ascii_without_validation("h24"sv.bytes()),
};
}() };
return *hour_cycles;
}
Vector<Utf16String> available_hour_cycles(Utf16View locale)
{
auto preferred_hour_cycle = default_hour_cycle(locale);
if (!preferred_hour_cycle.has_value())
return available_hour_cycles();
Vector<Utf16String> hour_cycles;
hour_cycles.append(available_hour_cycles()[to_underlying(*preferred_hour_cycle)]);
for (auto const& hour_cycle : available_hour_cycles()) {
if (hour_cycle != hour_cycles[0])
hour_cycles.append(hour_cycle);
}
return hour_cycles;
}
Vector<Utf16String> const& available_number_systems()
{
static NeverDestroyed<Vector<Utf16String>> number_systems { []() -> Vector<Utf16String> {
UErrorCode status = U_ZERO_ERROR;
auto keywords = adopt_own_if_nonnull(icu::NumberingSystem::getAvailableNames(status));
if (icu_failure(status))
return {};
Vector<Utf16String> number_systems;
while (true) {
i32 length = 0;
auto const* keyword = keywords->next(&length, status);
if (icu_failure(status) || keyword == nullptr)
break;
auto system = adopt_own_if_nonnull(icu::NumberingSystem::createInstanceByName(keyword, status));
if (icu_failure(status))
return {};
if (!static_cast<bool>(system->isAlgorithmic())) {
if (auto const* bcp47_value = uloc_toUnicodeLocaleType("nu", keyword))
number_systems.append(Utf16String::from_ascii_without_validation(StringView { bcp47_value, strlen(bcp47_value) }.bytes()));
}
}
quick_sort(number_systems);
return number_systems;
}() };
return *number_systems;
}
Vector<Utf16String> available_number_systems(Utf16View locale)
{
auto locale_data = LocaleData::for_locale(locale.bytes());
if (!locale_data.has_value())
return {};
Vector<Utf16String> number_systems;
auto const* preferred_number_system = locale_data->numbering_system().getName();
number_systems.append(Utf16String::from_ascii_without_validation(StringView { preferred_number_system, strlen(preferred_number_system) }.bytes()));
for (auto const& number_system : available_number_systems()) {
if (number_system != number_systems[0])
number_systems.append(number_system);
}
return number_systems;
}
}