ladybird/Libraries/LibJS/Runtime/Intl/PluralRulesConstructor.cpp
Andreas Kling 7025dd1fa7 Libraries: Parse JS strings from UTF-16
Thread UTF-16 string input through JSON, script parsing, Date parsing,
Intl option parsing, Temporal parsing, and the helper library boundaries
that feed those parsers. Preserve ASCII fast paths where the source data
is known to be ASCII.
2026-06-22 19:51:25 +02:00

118 lines
5.5 KiB
C++

/*
* Copyright (c) 2022-2025, Tim Flynn <trflynn89@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Array.h>
#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/NumberFormatConstructor.h>
#include <LibJS/Runtime/Intl/PluralRules.h>
#include <LibJS/Runtime/Intl/PluralRulesConstructor.h>
namespace JS::Intl {
GC_DEFINE_ALLOCATOR(PluralRulesConstructor);
// 17.1 The Intl.PluralRules Constructor, https://tc39.es/ecma402/#sec-intl-pluralrules-constructor
PluralRulesConstructor::PluralRulesConstructor(Realm& realm)
: NativeFunction(realm.vm().names.PluralRules.as_string(), realm.intrinsics().function_prototype())
{
}
void PluralRulesConstructor::initialize(Realm& realm)
{
Base::initialize(realm);
auto& vm = this->vm();
// 17.2.1 Intl.PluralRules.prototype, https://tc39.es/ecma402/#sec-intl.pluralrules.prototype
define_direct_property(vm.names.prototype, realm.intrinsics().intl_plural_rules_prototype(), 0);
define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(realm, vm.names.supportedLocalesOf, supported_locales_of, 1, attr);
}
// 17.1.1 Intl.PluralRules ( [ locales [ , options ] ] ), https://tc39.es/ecma402/#sec-intl.pluralrules
ThrowCompletionOr<Value> PluralRulesConstructor::call()
{
// 1. If NewTarget is undefined, throw a TypeError exception.
return vm().throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, "Intl.PluralRules");
}
// 17.1.1 Intl.PluralRules ( [ locales [ , options ] ] ), https://tc39.es/ecma402/#sec-intl.pluralrules
ThrowCompletionOr<GC::Ref<Object>> PluralRulesConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto locales_value = vm.argument(0);
auto options_value = vm.argument(1);
// 2. Let pluralRules be ? OrdinaryCreateFromConstructor(NewTarget, "%Intl.PluralRules.prototype%", « [[InitializedPluralRules]], [[Locale]], [[Type]], [[Notation]], [[CompactDisplay]], [[MinimumIntegerDigits]], [[MinimumFractionDigits]], [[MaximumFractionDigits]], [[MinimumSignificantDigits]], [[MaximumSignificantDigits]], [[RoundingType]], [[RoundingIncrement]], [[RoundingMode]], [[ComputedRoundingPriority]], [[TrailingZeroDisplay]] »).
auto plural_rules = TRY(ordinary_create_from_constructor<PluralRules>(vm, new_target, &Intrinsics::intl_plural_rules_prototype));
// 3. Let optionsResolution be ? ResolveOptions(%Intl.PluralRules%, %Intl.PluralRules%.[[LocaleData]], locales, options, « COERCE-OPTIONS »).
// 4. Set options to optionsResolution.[[Options]].
// 5. Let r be optionsResolution.[[ResolvedLocale]].
auto [options, result, _] = TRY(resolve_options(vm, plural_rules, locales_value, options_value, SpecialBehaviors::CoerceOptions));
// 6. Set pluralRules.[[Locale]] to r.[[locale]].
plural_rules->set_locale(move(result.locale));
// 7. Let t be ? GetOption(options, "type", string, « "cardinal", "ordinal" », "cardinal").
auto type = TRY(get_option(vm, *options, vm.names.type, OptionType::String, AK::Array { "cardinal"sv, "ordinal"sv }, "cardinal"sv));
// 8. Set pluralRules.[[Type]] to t.
plural_rules->set_type(type.as_string().utf16_string_view());
// 9. Let notation be ? GetOption(options, "notation", string, « "standard", "scientific", "engineering", "compact" », "standard").
auto notation = TRY(get_option(vm, *options, vm.names.notation, OptionType::String, { "standard"sv, "scientific"sv, "engineering"sv, "compact"sv }, "standard"sv));
// 10. Set pluralRules.[[Notation]] to notation.
plural_rules->set_notation(notation.as_string().utf16_string_view());
// 11. Let compactDisplay be ? GetOption(options, "compactDisplay", string, « "short", "long" », "short").
auto compact_display = TRY(get_option(vm, *options, vm.names.compactDisplay, OptionType::String, { "short"sv, "long"sv }, "short"sv));
// 12. If notation is "compact", then
if (plural_rules->notation() == Unicode::Notation::Compact) {
// a. Set pluralRules.[[CompactDisplay]] to compactDisplay.
plural_rules->set_compact_display(compact_display.as_string().utf16_string_view());
}
// 13. Perform ? SetNumberFormatDigitOptions(pluralRules, options, 0, 3, notation).
TRY(set_number_format_digit_options(vm, plural_rules, *options, 0, 3, plural_rules->notation()));
// Non-standard, create an ICU number formatter for this Intl object.
auto formatter = Unicode::NumberFormat::create(
result.icu_locale,
plural_rules->display_options(),
plural_rules->rounding_options());
formatter->create_plural_rules(plural_rules->type());
plural_rules->set_formatter(move(formatter));
// 14. Return pluralRules.
return plural_rules;
}
// 17.2.2 Intl.PluralRules.supportedLocalesOf ( locales [ , options ] ), https://tc39.es/ecma402/#sec-intl.pluralrules.supportedlocalesof
JS_DEFINE_NATIVE_FUNCTION(PluralRulesConstructor::supported_locales_of)
{
auto locales = vm.argument(0);
auto options = vm.argument(1);
// 1. Let availableLocales be %PluralRules%.[[AvailableLocales]].
// 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));
}
}