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// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_INTL_SUPPORT
#error Internationalization is expected to be enabled.
#endif // V8_INTL_SUPPORT
#include "src/objects/js-plural-rules.h"
#include "src/execution/isolate-inl.h"
#include "src/objects/intl-objects.h"
#include "src/objects/js-number-format.h"
#include "src/objects/js-plural-rules-inl.h"
#include "unicode/locid.h"
#include "unicode/numberformatter.h"
#include "unicode/plurrule.h"
#include "unicode/unumberformatter.h"
namespace v8 {
namespace internal {
namespace {
bool CreateICUPluralRules(Isolate* isolate, const icu::Locale& icu_locale,
JSPluralRules::Type type,
std::unique_ptr<icu::PluralRules>* pl) {
// Make formatter from options. Numbering system is added
// to the locale as Unicode extension (if it was specified at all).
UErrorCode status = U_ZERO_ERROR;
UPluralType icu_type = UPLURAL_TYPE_CARDINAL;
if (type == JSPluralRules::Type::ORDINAL) {
icu_type = UPLURAL_TYPE_ORDINAL;
} else {
CHECK_EQ(JSPluralRules::Type::CARDINAL, type);
}
std::unique_ptr<icu::PluralRules> plural_rules(
icu::PluralRules::forLocale(icu_locale, icu_type, status));
if (U_FAILURE(status)) {
return false;
}
CHECK_NOT_NULL(plural_rules.get());
*pl = std::move(plural_rules);
return true;
}
} // namespace
Handle<String> JSPluralRules::TypeAsString() const {
switch (type()) {
case Type::CARDINAL:
return GetReadOnlyRoots().cardinal_string_handle();
case Type::ORDINAL:
return GetReadOnlyRoots().ordinal_string_handle();
}
UNREACHABLE();
}
// static
MaybeHandle<JSPluralRules> JSPluralRules::New(Isolate* isolate, Handle<Map> map,
Handle<Object> locales,
Handle<Object> options_obj) {
// 1. Let requestedLocales be ? CanonicalizeLocaleList(locales).
Maybe<std::vector<std::string>> maybe_requested_locales =
Intl::CanonicalizeLocaleList(isolate, locales);
MAYBE_RETURN(maybe_requested_locales, Handle<JSPluralRules>());
std::vector<std::string> requested_locales =
maybe_requested_locales.FromJust();
// 2. If options is undefined, then
if (options_obj->IsUndefined(isolate)) {
// 2. a. Let options be ObjectCreate(null).
options_obj = isolate->factory()->NewJSObjectWithNullProto();
} else {
// 3. Else
// 3. a. Let options be ? ToObject(options).
ASSIGN_RETURN_ON_EXCEPTION(
isolate, options_obj,
Object::ToObject(isolate, options_obj, "Intl.PluralRules"),
JSPluralRules);
}
// At this point, options_obj can either be a JSObject or a JSProxy only.
Handle<JSReceiver> options = Handle<JSReceiver>::cast(options_obj);
// 5. Let matcher be ? GetOption(options, "localeMatcher", "string",
// « "lookup", "best fit" », "best fit").
// 6. Set opt.[[localeMatcher]] to matcher.
Maybe<Intl::MatcherOption> maybe_locale_matcher =
Intl::GetLocaleMatcher(isolate, options, "Intl.PluralRules");
MAYBE_RETURN(maybe_locale_matcher, MaybeHandle<JSPluralRules>());
Intl::MatcherOption matcher = maybe_locale_matcher.FromJust();
// 7. Let t be ? GetOption(options, "type", "string", « "cardinal",
// "ordinal" », "cardinal").
Maybe<Type> maybe_type = Intl::GetStringOption<Type>(
isolate, options, "type", "Intl.PluralRules", {"cardinal", "ordinal"},
{Type::CARDINAL, Type::ORDINAL}, Type::CARDINAL);
MAYBE_RETURN(maybe_type, MaybeHandle<JSPluralRules>());
Type type = maybe_type.FromJust();
// Note: The spec says we should do ResolveLocale after performing
// SetNumberFormatDigitOptions but we need the locale to create all
// the ICU data structures.
//
// This isn't observable so we aren't violating the spec.
// 11. Let r be ResolveLocale(%PluralRules%.[[AvailableLocales]],
// requestedLocales, opt, %PluralRules%.[[RelevantExtensionKeys]],
// localeData).
Maybe<Intl::ResolvedLocale> maybe_resolve_locale =
Intl::ResolveLocale(isolate, JSPluralRules::GetAvailableLocales(),
requested_locales, matcher, {});
if (maybe_resolve_locale.IsNothing()) {
THROW_NEW_ERROR(isolate, NewRangeError(MessageTemplate::kIcuError),
JSPluralRules);
}
Intl::ResolvedLocale r = maybe_resolve_locale.FromJust();
Handle<String> locale_str =
isolate->factory()->NewStringFromAsciiChecked(r.locale.c_str());
icu::number::LocalizedNumberFormatter icu_number_formatter =
icu::number::NumberFormatter::withLocale(r.icu_locale)
.roundingMode(UNUM_ROUND_HALFUP);
std::unique_ptr<icu::PluralRules> icu_plural_rules;
bool success =
CreateICUPluralRules(isolate, r.icu_locale, type, &icu_plural_rules);
if (!success || icu_plural_rules.get() == nullptr) {
// Remove extensions and try again.
icu::Locale no_extension_locale(r.icu_locale.getBaseName());
success = CreateICUPluralRules(isolate, no_extension_locale, type,
&icu_plural_rules);
icu_number_formatter =
icu::number::NumberFormatter::withLocale(no_extension_locale)
.roundingMode(UNUM_ROUND_HALFUP);
if (!success || icu_plural_rules.get() == nullptr) {
THROW_NEW_ERROR(isolate, NewRangeError(MessageTemplate::kIcuError),
JSPluralRules);
}
}
// 9. Perform ? SetNumberFormatDigitOptions(pluralRules, options, 0, 3).
Maybe<Intl::NumberFormatDigitOptions> maybe_digit_options =
Intl::SetNumberFormatDigitOptions(isolate, options, 0, 3, false);
MAYBE_RETURN(maybe_digit_options, MaybeHandle<JSPluralRules>());
Intl::NumberFormatDigitOptions digit_options = maybe_digit_options.FromJust();
icu_number_formatter = JSNumberFormat::SetDigitOptionsToFormatter(
icu_number_formatter, digit_options);
Handle<Managed<icu::PluralRules>> managed_plural_rules =
Managed<icu::PluralRules>::FromUniquePtr(isolate, 0,
std::move(icu_plural_rules));
Handle<Managed<icu::number::LocalizedNumberFormatter>>
managed_number_formatter =
Managed<icu::number::LocalizedNumberFormatter>::FromRawPtr(
isolate, 0,
new icu::number::LocalizedNumberFormatter(icu_number_formatter));
// Now all properties are ready, so we can allocate the result object.
Handle<JSPluralRules> plural_rules = Handle<JSPluralRules>::cast(
isolate->factory()->NewFastOrSlowJSObjectFromMap(map));
DisallowHeapAllocation no_gc;
plural_rules->set_flags(0);
// 8. Set pluralRules.[[Type]] to t.
plural_rules->set_type(type);
// 12. Set pluralRules.[[Locale]] to the value of r.[[locale]].
plural_rules->set_locale(*locale_str);
plural_rules->set_icu_plural_rules(*managed_plural_rules);
plural_rules->set_icu_number_formatter(*managed_number_formatter);
// 13. Return pluralRules.
return plural_rules;
}
MaybeHandle<String> JSPluralRules::ResolvePlural(
Isolate* isolate, Handle<JSPluralRules> plural_rules, double number) {
icu::PluralRules* icu_plural_rules = plural_rules->icu_plural_rules().raw();
CHECK_NOT_NULL(icu_plural_rules);
icu::number::LocalizedNumberFormatter* fmt =
plural_rules->icu_number_formatter().raw();
CHECK_NOT_NULL(fmt);
UErrorCode status = U_ZERO_ERROR;
icu::number::FormattedNumber formatted_number =
fmt->formatDouble(number, status);
CHECK(U_SUCCESS(status));
icu::UnicodeString result =
icu_plural_rules->select(formatted_number, status);
CHECK(U_SUCCESS(status));
return Intl::ToString(isolate, result);
}
namespace {
void CreateDataPropertyForOptions(Isolate* isolate, Handle<JSObject> options,
Handle<Object> value, const char* key) {
Handle<String> key_str = isolate->factory()->NewStringFromAsciiChecked(key);
// This is a brand new JSObject that shouldn't already have the same
// key so this shouldn't fail.
CHECK(JSReceiver::CreateDataProperty(isolate, options, key_str, value,
Just(kDontThrow))
.FromJust());
}
void CreateDataPropertyForOptions(Isolate* isolate, Handle<JSObject> options,
int value, const char* key) {
Handle<Smi> value_smi(Smi::FromInt(value), isolate);
CreateDataPropertyForOptions(isolate, options, value_smi, key);
}
} // namespace
Handle<JSObject> JSPluralRules::ResolvedOptions(
Isolate* isolate, Handle<JSPluralRules> plural_rules) {
Handle<JSObject> options =
isolate->factory()->NewJSObject(isolate->object_function());
Handle<String> locale_value(plural_rules->locale(), isolate);
CreateDataPropertyForOptions(isolate, options, locale_value, "locale");
CreateDataPropertyForOptions(isolate, options, plural_rules->TypeAsString(),
"type");
UErrorCode status = U_ZERO_ERROR;
icu::number::LocalizedNumberFormatter* icu_number_formatter =
plural_rules->icu_number_formatter().raw();
icu::UnicodeString skeleton = icu_number_formatter->toSkeleton(status);
CHECK(U_SUCCESS(status));
CreateDataPropertyForOptions(
isolate, options,
JSNumberFormat::MinimumIntegerDigitsFromSkeleton(skeleton),
"minimumIntegerDigits");
int32_t min = 0, max = 0;
if (JSNumberFormat::SignificantDigitsFromSkeleton(skeleton, &min, &max)) {
CreateDataPropertyForOptions(isolate, options, min,
"minimumSignificantDigits");
CreateDataPropertyForOptions(isolate, options, max,
"maximumSignificantDigits");
} else {
JSNumberFormat::FractionDigitsFromSkeleton(skeleton, &min, &max);
CreateDataPropertyForOptions(isolate, options, min,
"minimumFractionDigits");
CreateDataPropertyForOptions(isolate, options, max,
"maximumFractionDigits");
}
// 6. Let pluralCategories be a List of Strings representing the
// possible results of PluralRuleSelect for the selected locale pr.
icu::PluralRules* icu_plural_rules = plural_rules->icu_plural_rules().raw();
CHECK_NOT_NULL(icu_plural_rules);
std::unique_ptr<icu::StringEnumeration> categories(
icu_plural_rules->getKeywords(status));
CHECK(U_SUCCESS(status));
int32_t count = categories->count(status);
CHECK(U_SUCCESS(status));
Handle<FixedArray> plural_categories =
isolate->factory()->NewFixedArray(count);
for (int32_t i = 0; i < count; i++) {
const icu::UnicodeString* category = categories->snext(status);
CHECK(U_SUCCESS(status));
if (category == nullptr) break;
std::string keyword;
Handle<String> value = isolate->factory()->NewStringFromAsciiChecked(
category->toUTF8String(keyword).data());
plural_categories->set(i, *value);
}
// 7. Perform ! CreateDataProperty(options, "pluralCategories",
// CreateArrayFromList(pluralCategories)).
Handle<JSArray> plural_categories_value =
isolate->factory()->NewJSArrayWithElements(plural_categories);
CreateDataPropertyForOptions(isolate, options, plural_categories_value,
"pluralCategories");
return options;
}
namespace {
class PluralRulesAvailableLocales {
public:
PluralRulesAvailableLocales() {
UErrorCode status = U_ZERO_ERROR;
std::unique_ptr<icu::StringEnumeration> locales(
icu::PluralRules::getAvailableLocales(status));
CHECK(U_SUCCESS(status));
int32_t len = 0;
const char* locale = nullptr;
while ((locale = locales->next(&len, status)) != nullptr &&
U_SUCCESS(status)) {
std::string str(locale);
if (len > 3) {
std::replace(str.begin(), str.end(), '_', '-');
}
set_.insert(std::move(str));
}
}
const std::set<std::string>& Get() const { return set_; }
private:
std::set<std::string> set_;
};
} // namespace
const std::set<std::string>& JSPluralRules::GetAvailableLocales() {
static base::LazyInstance<PluralRulesAvailableLocales>::type
available_locales = LAZY_INSTANCE_INITIALIZER;
return available_locales.Pointer()->Get();
// return Intl::GetAvailableLocalesForLocale();
}
} // namespace internal
} // namespace v8
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