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LibJS: Implement Intl.Locale.prototype.hourCycles property

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Timothy Flynn 2022-07-05 13:41:08 -04:00 • committed by Linus Groh
parent 4d32f38a76
commit ee2be5895f
6 changed files with 55 additions and 1 deletions
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19
Userland/Libraries/LibJS/Runtime/Intl/Locale.cpp
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@ -107,4 +107,23 @@ Array* collations_of_locale(GlobalObject& global_object, Locale const& locale_ob
return create_array_from_list_or_restricted(global_object, move(list), move(restricted));
}
// 1.1.4 HourCyclesOfLocale ( loc ), https://tc39.es/proposal-intl-locale-info/#sec-hour-cycles-of-locale
Array* hour_cycles_of_locale(GlobalObject& global_object, Locale const& locale_object)
{
// 1. Let restricted be loc.[[HourCycle]].
Optional<String> restricted = locale_object.has_hour_cycle() ? locale_object.hour_cycle() : Optional<String> {};
// 2. Let locale be loc.[[Locale]].
auto const& locale = locale_object.locale();
// 3. Assert: locale matches the unicode_locale_id production.
VERIFY(Unicode::parse_unicode_locale_id(locale).has_value());
// 4. Let list be a List of 1 or more unique hour cycle identifiers, which must be lower case String values indicating either the 12-hour format ("h11", "h12") or the 24-hour format ("h23", "h24"), sorted in descending preference of those in common use for date and time formatting in locale.
auto list = Unicode::get_keywords_for_locale(locale, "hc"sv);
// 5. Return ! CreateArrayFromListOrRestricted( list, restricted ).
return create_array_from_list_or_restricted(global_object, move(list), move(restricted));
}
}