b6bef6b688
Produce JS-visible string results as UTF-16 at their source, including numeric formatting, BigInt and BigFraction formatting, URI encoding, console formatting, parser errors, regular expression errors, Intl and Temporal records, LibUnicode locale boundaries, and LibWeb bindings. Handle fractional radix formatting through the UTF-16 builder view.
90 lines
3.7 KiB
C++
90 lines
3.7 KiB
C++
/*
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* Copyright (c) 2022-2025, Tim Flynn <trflynn89@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Intl/PluralRules.h>
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#include <LibJS/Runtime/VM.h>
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namespace JS::Intl {
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GC_DEFINE_ALLOCATOR(PluralRules);
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// 17 PluralRules Objects, https://tc39.es/ecma402/#pluralrules-objects
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PluralRules::PluralRules(Object& prototype)
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: NumberFormatBase(prototype)
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{
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}
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// 17.2.3 Internal slots, https://tc39.es/ecma402/#sec-intl.pluralrules-internal-slots
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ReadonlySpan<Utf16View> PluralRules::relevant_extension_keys() const
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{
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// The value of the [[RelevantExtensionKeys]] internal slot is « ».
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return {};
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}
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// 17.2.3 Internal slots, https://tc39.es/ecma402/#sec-intl.pluralrules-internal-slots
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ReadonlySpan<ResolutionOptionDescriptor> PluralRules::resolution_option_descriptors(VM&) const
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{
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// The value of the [[ResolutionOptionDescriptors]] internal slot is « ».
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return {};
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}
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// 17.5.2 ResolvePlural ( pluralRules, n ), https://tc39.es/ecma402/#sec-resolveplural
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Unicode::PluralCategory resolve_plural(PluralRules const& plural_rules, MathematicalValue const& number)
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{
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// 1. If n is NOT-A-NUMBER, then
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if (number.is_nan()) {
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// a. Let s be an ILD String value indicating the NaN value.
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// b. Return the Record { [[PluralCategory]]: "other", [[FormattedString]]: s }.
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return Unicode::PluralCategory::Other;
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}
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// 2. If n is POSITIVE-INFINITY, then
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if (number.is_positive_infinity()) {
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// a. Let s be an ILD String value indicating positive infinity.
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// b. Return the Record { [[PluralCategory]]: "other", [[FormattedString]]: s }.
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return Unicode::PluralCategory::Other;
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}
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// 3. If n is NEGATIVE-INFINITY, then
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if (number.is_negative_infinity()) {
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// a. Let s be an ILD String value indicating negative infinity.
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// b. Return the Record { [[PluralCategory]]: "other", [[FormattedString]]: s }.
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return Unicode::PluralCategory::Other;
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}
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// 4. Let res be FormatNumericToString(pluralRules, n).
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// 5. Let s be res.[[FormattedString]].
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// 6. Let locale be pluralRules.[[Locale]].
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// 7. Let type be pluralRules.[[Type]].
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// 8. Let notation be pluralRules.[[Notation]].
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// 9. Let compactDisplay be pluralRules.[[CompactDisplay]].
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// 10. Let p be PluralRuleSelect(locale, type, notation, compactDisplay, s).
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// 11. Return the Record { [[PluralCategory]]: p, [[FormattedString]]: s }.
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return plural_rules.formatter().select_plural(number.to_value());
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}
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// 17.5.4 ResolvePluralRange ( pluralRules, x, y ), https://tc39.es/ecma402/#sec-resolvepluralrange
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ThrowCompletionOr<Unicode::PluralCategory> resolve_plural_range(VM& vm, PluralRules const& plural_rules, MathematicalValue const& start, MathematicalValue const& end)
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{
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// 1. If x is NOT-A-NUMBER or y is NOT-A-NUMBER, throw a RangeError exception.
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if (start.is_nan())
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return vm.throw_completion<RangeError>(ErrorType::NumberIsNaN, "start"sv);
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if (end.is_nan())
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return vm.throw_completion<RangeError>(ErrorType::NumberIsNaN, "end"sv);
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// 2. Let xp be ResolvePlural(pluralRules, x).
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// 3. Let yp be ResolvePlural(pluralRules, y).
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// 4. If xp.[[FormattedString]] is yp.[[FormattedString]], then
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// a. Return xp.[[PluralCategory]].
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// 5. Let locale be pluralRules.[[Locale]].
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// 6. Let type be pluralRules.[[Type]].
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// 7. Let notation be pluralRules.[[Notation]].
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// 8. Let compactDisplay be pluralRules.[[CompactDisplay]].
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// 9. Return PluralRuleSelectRange(locale, type, notation, compactDisplay, xp.[[PluralCategory]], yp.[[PluralCategory]]).
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return plural_rules.formatter().select_plural_range(start.to_value(), end.to_value());
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}
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}
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