ladybird/Libraries/LibJS/Runtime/Intl/DisplayNamesConstructor.cpp
Timothy Flynn 3f55240a8e LibJS: Migrate Intl.DisplayNames to use ResolveOptions
This is an editorial change in the ECMA-402 spec. See:
5eafacd
2025-04-08 06:50:40 -04:00

131 lines
5.9 KiB
C++

/*
* Copyright (c) 2021-2025, Tim Flynn <trflynn89@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/AbstractOperations.h>
#include <LibJS/Runtime/Intl/DisplayNames.h>
#include <LibJS/Runtime/Intl/DisplayNamesConstructor.h>
#include <LibUnicode/Locale.h>
namespace JS::Intl {
GC_DEFINE_ALLOCATOR(DisplayNamesConstructor);
// 12.1 The Intl.DisplayNames Constructor, https://tc39.es/ecma402/#sec-intl-displaynames-constructor
DisplayNamesConstructor::DisplayNamesConstructor(Realm& realm)
: NativeFunction(realm.vm().names.DisplayNames.as_string(), realm.intrinsics().function_prototype())
{
}
void DisplayNamesConstructor::initialize(Realm& realm)
{
Base::initialize(realm);
auto& vm = this->vm();
// 12.2.1 Intl.DisplayNames.prototype, https://tc39.es/ecma402/#sec-Intl.DisplayNames.prototype
define_direct_property(vm.names.prototype, realm.intrinsics().intl_display_names_prototype(), 0);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(realm, vm.names.supportedLocalesOf, supported_locales_of, 1, attr);
define_direct_property(vm.names.length, Value(2), Attribute::Configurable);
}
// 12.1.1 Intl.DisplayNames ( locales, options ), https://tc39.es/ecma402/#sec-Intl.DisplayNames
ThrowCompletionOr<Value> DisplayNamesConstructor::call()
{
// 1. If NewTarget is undefined, throw a TypeError exception.
return vm().throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, "Intl.DisplayNames");
}
// 12.1.1 Intl.DisplayNames ( locales, options ), https://tc39.es/ecma402/#sec-Intl.DisplayNames
ThrowCompletionOr<GC::Ref<Object>> DisplayNamesConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto locales_value = vm.argument(0);
auto options_value = vm.argument(1);
// 2. Let displayNames be ? OrdinaryCreateFromConstructor(NewTarget, "%Intl.DisplayNames.prototype%", « [[InitializedDisplayNames]], [[Locale]], [[Style]], [[Type]], [[Fallback]], [[LanguageDisplay]], [[Fields]] »).
auto display_names = TRY(ordinary_create_from_constructor<DisplayNames>(vm, new_target, &Intrinsics::intl_display_names_prototype));
// 3. Let optionsResolution be ? ResolveOptions(%Intl.DisplayNames%, %Intl.DisplayNames%.[[LocaleData]], locales, options, « REQUIRE-OPTIONS »).
// 4. Set options to optionsResolution.[[Options]].
// 5. Let r be optionsResolution.[[ResolvedLocale]].
auto [options, result, _] = TRY(resolve_options(vm, display_names, locales_value, options_value, SpecialBehaviors::RequireOptions));
// 6. Let style be ? GetOption(options, "style", string, « "narrow", "short", "long" », "long").
auto style = TRY(get_option(vm, *options, vm.names.style, OptionType::String, { "narrow"sv, "short"sv, "long"sv }, "long"sv));
// 7. Set displayNames.[[Style]] to style.
display_names->set_style(style.as_string().utf8_string_view());
// 8. Let type be ? GetOption(options, "type", string, « "language", "region", "script", "currency", "calendar", "dateTimeField" », undefined).
auto type = TRY(get_option(vm, *options, vm.names.type, OptionType::String, { "language"sv, "region"sv, "script"sv, "currency"sv, "calendar"sv, "dateTimeField"sv }, Empty {}));
// 9. If type is undefined, throw a TypeError exception.
if (type.is_undefined())
return vm.throw_completion<TypeError>(ErrorType::IsUndefined, "options.type"sv);
// 10. Set displayNames.[[Type]] to type.
display_names->set_type(type.as_string().utf8_string_view());
// 11. Let fallback be ? GetOption(options, "fallback", string, « "code", "none" », "code").
auto fallback = TRY(get_option(vm, *options, vm.names.fallback, OptionType::String, { "code"sv, "none"sv }, "code"sv));
// 12. Set displayNames.[[Fallback]] to fallback.
display_names->set_fallback(fallback.as_string().utf8_string_view());
// 13. Set displayNames.[[Locale]] to r.[[Locale]].
display_names->set_locale(move(result.locale));
// 14. Let resolvedLocaleData be r.[[LocaleData]].
// 15. Let types be resolvedLocaleData.[[types]].
// 16. Assert: types is a Record (see 12.2.3).
// 17. Let languageDisplay be ? GetOption(options, "languageDisplay", string, « "dialect", "standard" », "dialect").
auto language_display = TRY(get_option(vm, *options, vm.names.languageDisplay, OptionType::String, { "dialect"sv, "standard"sv }, "dialect"sv));
// 18. Let typeFields be types.[[<type>]].
// 19. Assert: typeFields is a Record (see 12.2.3).
// 20. If type is "language", then
if (display_names->type() == DisplayNames::Type::Language) {
// a. Set displayNames.[[LanguageDisplay]] to languageDisplay.
display_names->set_language_display(language_display.as_string().utf8_string_view());
// b. Set typeFields to typeFields.[[<languageDisplay>]].
// c. Assert: typeFields is a Record (see 12.2.3).
}
// 21. Let styleFields be typeFields.[[<style>]].
// 22. Assert: styleFields is a Record (see 12.2.3).
// 23. Set displayNames.[[Fields]] to styleFields.
// 24. Return displayNames.
return display_names;
}
// 12.2.2 Intl.DisplayNames.supportedLocalesOf ( locales [ , options ] ), https://tc39.es/ecma402/#sec-Intl.DisplayNames.supportedLocalesOf
JS_DEFINE_NATIVE_FUNCTION(DisplayNamesConstructor::supported_locales_of)
{
auto locales = vm.argument(0);
auto options = vm.argument(1);
// 1. Let availableLocales be %DisplayNames%.[[AvailableLocales]].
// No-op, availability of each requested locale is checked via Unicode::is_locale_available()
// 2. Let requestedLocales be ? CanonicalizeLocaleList(locales).
auto requested_locales = TRY(canonicalize_locale_list(vm, locales));
// 3. Return ? FilterLocales(availableLocales, requestedLocales, options).
return TRY(filter_locales(vm, requested_locales, options));
}
}