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chromium / v8 / v8 / 43fff26fd4560938cbe0ab8b3a9f592b6f541416 / . / src / objects / intl-objects.cc
blob: 7ab34433c32c145785cc0818326e88cee215e2ea [file] [log] [blame]
// Copyright 2013 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/intl-objects.h"
#include "src/objects/intl-objects-inl.h"
#include <algorithm>
#include <memory>
#include <string>
#include <vector>
#include "src/api-inl.h"
#include "src/global-handles.h"
#include "src/heap/factory.h"
#include "src/intl.h"
#include "src/isolate.h"
#include "src/objects-inl.h"
#include "src/objects/js-collator-inl.h"
#include "src/objects/managed.h"
#include "src/objects/string.h"
#include "src/property-descriptor.h"
#include "unicode/brkiter.h"
#include "unicode/bytestream.h"
#include "unicode/calendar.h"
#include "unicode/coll.h"
#include "unicode/curramt.h"
#include "unicode/dcfmtsym.h"
#include "unicode/decimfmt.h"
#include "unicode/dtfmtsym.h"
#include "unicode/dtptngen.h"
#include "unicode/gregocal.h"
#include "unicode/locid.h"
#include "unicode/numfmt.h"
#include "unicode/numsys.h"
#include "unicode/plurrule.h"
#include "unicode/rbbi.h"
#include "unicode/regex.h"
#include "unicode/smpdtfmt.h"
#include "unicode/timezone.h"
#include "unicode/uchar.h"
#include "unicode/ucol.h"
#include "unicode/ucurr.h"
#include "unicode/unum.h"
#include "unicode/upluralrules.h"
#include "unicode/ures.h"
#include "unicode/uvernum.h"
#include "unicode/uversion.h"
#if U_ICU_VERSION_MAJOR_NUM >= 59
#include "unicode/char16ptr.h"
#endif
namespace v8 {
namespace internal {
namespace {
bool ExtractStringSetting(Isolate* isolate, Handle<JSObject> options,
const char* key, icu::UnicodeString* setting) {
v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate);
Handle<String> str = isolate->factory()->NewStringFromAsciiChecked(key);
Handle<Object> object =
JSReceiver::GetProperty(isolate, options, str).ToHandleChecked();
if (object->IsString()) {
v8::String::Utf8Value utf8_string(
v8_isolate, v8::Utils::ToLocal(Handle<String>::cast(object)));
*setting = icu::UnicodeString::fromUTF8(*utf8_string);
return true;
}
return false;
}
bool ExtractIntegerSetting(Isolate* isolate, Handle<JSObject> options,
const char* key, int32_t* value) {
Handle<String> str = isolate->factory()->NewStringFromAsciiChecked(key);
Handle<Object> object =
JSReceiver::GetProperty(isolate, options, str).ToHandleChecked();
if (object->IsNumber()) {
return object->ToInt32(value);
}
return false;
}
bool ExtractBooleanSetting(Isolate* isolate, Handle<JSObject> options,
const char* key, bool* value) {
Handle<String> str = isolate->factory()->NewStringFromAsciiChecked(key);
Handle<Object> object =
JSReceiver::GetProperty(isolate, options, str).ToHandleChecked();
if (object->IsBoolean()) {
*value = object->BooleanValue(isolate);
return true;
}
return false;
}
icu::SimpleDateFormat* CreateICUDateFormat(Isolate* isolate,
const icu::Locale& icu_locale,
Handle<JSObject> options) {
// Create time zone as specified by the user. We have to re-create time zone
// since calendar takes ownership.
icu::TimeZone* tz = nullptr;
icu::UnicodeString timezone;
if (ExtractStringSetting(isolate, options, "timeZone", &timezone)) {
tz = icu::TimeZone::createTimeZone(timezone);
} else {
tz = icu::TimeZone::createDefault();
}
// Create a calendar using locale, and apply time zone to it.
UErrorCode status = U_ZERO_ERROR;
icu::Calendar* calendar =
icu::Calendar::createInstance(tz, icu_locale, status);
if (calendar->getDynamicClassID() ==
icu::GregorianCalendar::getStaticClassID()) {
icu::GregorianCalendar* gc = (icu::GregorianCalendar*)calendar;
UErrorCode status = U_ZERO_ERROR;
// The beginning of ECMAScript time, namely -(2**53)
const double start_of_time = -9007199254740992;
gc->setGregorianChange(start_of_time, status);
DCHECK(U_SUCCESS(status));
}
// Make formatter from skeleton. Calendar and numbering system are added
// to the locale as Unicode extension (if they were specified at all).
icu::SimpleDateFormat* date_format = nullptr;
icu::UnicodeString skeleton;
if (ExtractStringSetting(isolate, options, "skeleton", &skeleton)) {
// See https://github.com/tc39/ecma402/issues/225 . The best pattern
// generation needs to be done in the base locale according to the
// current spec however odd it may be. See also crbug.com/826549 .
// This is a temporary work-around to get v8's external behavior to match
// the current spec, but does not follow the spec provisions mentioned
// in the above Ecma 402 issue.
// TODO(jshin): The spec may need to be revised because using the base
// locale for the pattern match is not quite right. Moreover, what to
// do with 'related year' part when 'chinese/dangi' calendar is specified
// has to be discussed. Revisit once the spec is clarified/revised.
icu::Locale no_extension_locale(icu_locale.getBaseName());
std::unique_ptr<icu::DateTimePatternGenerator> generator(
icu::DateTimePatternGenerator::createInstance(no_extension_locale,
status));
icu::UnicodeString pattern;
if (U_SUCCESS(status))
pattern = generator->getBestPattern(skeleton, status);
date_format = new icu::SimpleDateFormat(pattern, icu_locale, status);
if (U_SUCCESS(status)) {
date_format->adoptCalendar(calendar);
}
}
if (U_FAILURE(status)) {
delete calendar;
delete date_format;
date_format = nullptr;
}
return date_format;
}
void SetResolvedDateSettings(Isolate* isolate, const icu::Locale& icu_locale,
icu::SimpleDateFormat* date_format,
Handle<JSObject> resolved) {
Factory* factory = isolate->factory();
UErrorCode status = U_ZERO_ERROR;
icu::UnicodeString pattern;
date_format->toPattern(pattern);
JSObject::SetProperty(
isolate, resolved, factory->intl_pattern_symbol(),
factory
->NewStringFromTwoByte(Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(pattern.getBuffer()),
pattern.length()))
.ToHandleChecked(),
LanguageMode::kSloppy)
.Assert();
// Set time zone and calendar.
const icu::Calendar* calendar = date_format->getCalendar();
// getType() returns legacy calendar type name instead of LDML/BCP47 calendar
// key values. intl.js maps them to BCP47 values for key "ca".
// TODO(jshin): Consider doing it here, instead.
const char* calendar_name = calendar->getType();
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("calendar"),
factory->NewStringFromAsciiChecked(calendar_name), LanguageMode::kSloppy)
.Assert();
const icu::TimeZone& tz = calendar->getTimeZone();
icu::UnicodeString time_zone;
tz.getID(time_zone);
icu::UnicodeString canonical_time_zone;
icu::TimeZone::getCanonicalID(time_zone, canonical_time_zone, status);
if (U_SUCCESS(status)) {
// In CLDR (http://unicode.org/cldr/trac/ticket/9943), Etc/UTC is made
// a separate timezone ID from Etc/GMT even though they're still the same
// timezone. We have Etc/UTC because 'UTC', 'Etc/Universal',
// 'Etc/Zulu' and others are turned to 'Etc/UTC' by ICU. Etc/GMT comes
// from Etc/GMT0, Etc/GMT+0, Etc/GMT-0, Etc/Greenwich.
// ecma402##sec-canonicalizetimezonename step 3
if (canonical_time_zone == UNICODE_STRING_SIMPLE("Etc/UTC") ||
canonical_time_zone == UNICODE_STRING_SIMPLE("Etc/GMT")) {
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("timeZone"),
factory->NewStringFromStaticChars("UTC"), LanguageMode::kSloppy)
.Assert();
} else {
JSObject::SetProperty(isolate, resolved,
factory->NewStringFromStaticChars("timeZone"),
factory
->NewStringFromTwoByte(Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(
canonical_time_zone.getBuffer()),
canonical_time_zone.length()))
.ToHandleChecked(),
LanguageMode::kSloppy)
.Assert();
}
}
// Ugly hack. ICU doesn't expose numbering system in any way, so we have
// to assume that for given locale NumberingSystem constructor produces the
// same digits as NumberFormat/Calendar would.
status = U_ZERO_ERROR;
icu::NumberingSystem* numbering_system =
icu::NumberingSystem::createInstance(icu_locale, status);
if (U_SUCCESS(status)) {
const char* ns = numbering_system->getName();
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("numberingSystem"),
factory->NewStringFromAsciiChecked(ns), LanguageMode::kSloppy)
.Assert();
} else {
JSObject::SetProperty(isolate, resolved,
factory->NewStringFromStaticChars("numberingSystem"),
factory->undefined_value(), LanguageMode::kSloppy)
.Assert();
}
delete numbering_system;
// Set the locale
char result[ULOC_FULLNAME_CAPACITY];
status = U_ZERO_ERROR;
uloc_toLanguageTag(icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY,
FALSE, &status);
if (U_SUCCESS(status)) {
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("locale"),
factory->NewStringFromAsciiChecked(result), LanguageMode::kSloppy)
.Assert();
} else {
// This would never happen, since we got the locale from ICU.
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("locale"),
factory->NewStringFromStaticChars("und"), LanguageMode::kSloppy)
.Assert();
}
}
void SetNumericSettings(Isolate* isolate, icu::DecimalFormat* number_format,
Handle<JSObject> options) {
int32_t digits;
if (ExtractIntegerSetting(isolate, options, "minimumIntegerDigits",
&digits)) {
number_format->setMinimumIntegerDigits(digits);
}
if (ExtractIntegerSetting(isolate, options, "minimumFractionDigits",
&digits)) {
number_format->setMinimumFractionDigits(digits);
}
if (ExtractIntegerSetting(isolate, options, "maximumFractionDigits",
&digits)) {
number_format->setMaximumFractionDigits(digits);
}
bool significant_digits_used = false;
if (ExtractIntegerSetting(isolate, options, "minimumSignificantDigits",
&digits)) {
number_format->setMinimumSignificantDigits(digits);
significant_digits_used = true;
}
if (ExtractIntegerSetting(isolate, options, "maximumSignificantDigits",
&digits)) {
number_format->setMaximumSignificantDigits(digits);
significant_digits_used = true;
}
number_format->setSignificantDigitsUsed(significant_digits_used);
number_format->setRoundingMode(icu::DecimalFormat::kRoundHalfUp);
}
icu::DecimalFormat* CreateICUNumberFormat(Isolate* isolate,
const icu::Locale& icu_locale,
Handle<JSObject> options) {
// 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;
icu::DecimalFormat* number_format = nullptr;
icu::UnicodeString style;
icu::UnicodeString currency;
if (ExtractStringSetting(isolate, options, "style", &style)) {
if (style == UNICODE_STRING_SIMPLE("currency")) {
icu::UnicodeString display;
ExtractStringSetting(isolate, options, "currency", &currency);
ExtractStringSetting(isolate, options, "currencyDisplay", &display);
#if (U_ICU_VERSION_MAJOR_NUM == 4) && (U_ICU_VERSION_MINOR_NUM <= 6)
icu::NumberFormat::EStyles format_style;
if (display == UNICODE_STRING_SIMPLE("code")) {
format_style = icu::NumberFormat::kIsoCurrencyStyle;
} else if (display == UNICODE_STRING_SIMPLE("name")) {
format_style = icu::NumberFormat::kPluralCurrencyStyle;
} else {
format_style = icu::NumberFormat::kCurrencyStyle;
}
#else // ICU version is 4.8 or above (we ignore versions below 4.0).
UNumberFormatStyle format_style;
if (display == UNICODE_STRING_SIMPLE("code")) {
format_style = UNUM_CURRENCY_ISO;
} else if (display == UNICODE_STRING_SIMPLE("name")) {
format_style = UNUM_CURRENCY_PLURAL;
} else {
format_style = UNUM_CURRENCY;
}
#endif
number_format = static_cast<icu::DecimalFormat*>(
icu::NumberFormat::createInstance(icu_locale, format_style, status));
if (U_FAILURE(status)) {
delete number_format;
return nullptr;
}
} else if (style == UNICODE_STRING_SIMPLE("percent")) {
number_format = static_cast<icu::DecimalFormat*>(
icu::NumberFormat::createPercentInstance(icu_locale, status));
if (U_FAILURE(status)) {
delete number_format;
return nullptr;
}
// Make sure 1.1% doesn't go into 2%.
number_format->setMinimumFractionDigits(1);
} else {
// Make a decimal instance by default.
number_format = static_cast<icu::DecimalFormat*>(
icu::NumberFormat::createInstance(icu_locale, status));
}
}
if (U_FAILURE(status)) {
delete number_format;
return nullptr;
}
// Set all options.
if (!currency.isEmpty()) {
number_format->setCurrency(currency.getBuffer(), status);
}
SetNumericSettings(isolate, number_format, options);
bool grouping;
if (ExtractBooleanSetting(isolate, options, "useGrouping", &grouping)) {
number_format->setGroupingUsed(grouping);
}
return number_format;
}
void SetResolvedNumericSettings(Isolate* isolate, const icu::Locale& icu_locale,
icu::DecimalFormat* number_format,
Handle<JSObject> resolved) {
Factory* factory = isolate->factory();
JSObject::SetProperty(
isolate, resolved,
factory->NewStringFromStaticChars("minimumIntegerDigits"),
factory->NewNumberFromInt(number_format->getMinimumIntegerDigits()),
LanguageMode::kSloppy)
.Assert();
JSObject::SetProperty(
isolate, resolved,
factory->NewStringFromStaticChars("minimumFractionDigits"),
factory->NewNumberFromInt(number_format->getMinimumFractionDigits()),
LanguageMode::kSloppy)
.Assert();
JSObject::SetProperty(
isolate, resolved,
factory->NewStringFromStaticChars("maximumFractionDigits"),
factory->NewNumberFromInt(number_format->getMaximumFractionDigits()),
LanguageMode::kSloppy)
.Assert();
Handle<String> key =
factory->NewStringFromStaticChars("minimumSignificantDigits");
Maybe<bool> maybe = JSReceiver::HasOwnProperty(resolved, key);
CHECK(maybe.IsJust());
if (maybe.FromJust()) {
JSObject::SetProperty(
isolate, resolved,
factory->NewStringFromStaticChars("minimumSignificantDigits"),
factory->NewNumberFromInt(number_format->getMinimumSignificantDigits()),
LanguageMode::kSloppy)
.Assert();
}
key = factory->NewStringFromStaticChars("maximumSignificantDigits");
maybe = JSReceiver::HasOwnProperty(resolved, key);
CHECK(maybe.IsJust());
if (maybe.FromJust()) {
JSObject::SetProperty(
isolate, resolved,
factory->NewStringFromStaticChars("maximumSignificantDigits"),
factory->NewNumberFromInt(number_format->getMaximumSignificantDigits()),
LanguageMode::kSloppy)
.Assert();
}
// Set the locale
char result[ULOC_FULLNAME_CAPACITY];
UErrorCode status = U_ZERO_ERROR;
uloc_toLanguageTag(icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY,
FALSE, &status);
if (U_SUCCESS(status)) {
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("locale"),
factory->NewStringFromAsciiChecked(result), LanguageMode::kSloppy)
.Assert();
} else {
// This would never happen, since we got the locale from ICU.
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("locale"),
factory->NewStringFromStaticChars("und"), LanguageMode::kSloppy)
.Assert();
}
}
void SetResolvedNumberSettings(Isolate* isolate, const icu::Locale& icu_locale,
icu::DecimalFormat* number_format,
Handle<JSObject> resolved) {
Factory* factory = isolate->factory();
// Set resolved currency code in options.currency if not empty.
icu::UnicodeString currency(number_format->getCurrency());
if (!currency.isEmpty()) {
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("currency"),
factory
->NewStringFromTwoByte(Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(currency.getBuffer()),
currency.length()))
.ToHandleChecked(),
LanguageMode::kSloppy)
.Assert();
}
// Ugly hack. ICU doesn't expose numbering system in any way, so we have
// to assume that for given locale NumberingSystem constructor produces the
// same digits as NumberFormat/Calendar would.
UErrorCode status = U_ZERO_ERROR;
icu::NumberingSystem* numbering_system =
icu::NumberingSystem::createInstance(icu_locale, status);
if (U_SUCCESS(status)) {
const char* ns = numbering_system->getName();
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("numberingSystem"),
factory->NewStringFromAsciiChecked(ns), LanguageMode::kSloppy)
.Assert();
} else {
JSObject::SetProperty(isolate, resolved,
factory->NewStringFromStaticChars("numberingSystem"),
factory->undefined_value(), LanguageMode::kSloppy)
.Assert();
}
delete numbering_system;
JSObject::SetProperty(isolate, resolved,
factory->NewStringFromStaticChars("useGrouping"),
factory->ToBoolean(number_format->isGroupingUsed()),
LanguageMode::kSloppy)
.Assert();
SetResolvedNumericSettings(isolate, icu_locale, number_format, resolved);
}
icu::BreakIterator* CreateICUBreakIterator(Isolate* isolate,
const icu::Locale& icu_locale,
Handle<JSObject> options) {
UErrorCode status = U_ZERO_ERROR;
icu::BreakIterator* break_iterator = nullptr;
icu::UnicodeString type;
if (!ExtractStringSetting(isolate, options, "type", &type)) return nullptr;
if (type == UNICODE_STRING_SIMPLE("character")) {
break_iterator =
icu::BreakIterator::createCharacterInstance(icu_locale, status);
} else if (type == UNICODE_STRING_SIMPLE("sentence")) {
break_iterator =
icu::BreakIterator::createSentenceInstance(icu_locale, status);
} else if (type == UNICODE_STRING_SIMPLE("line")) {
break_iterator = icu::BreakIterator::createLineInstance(icu_locale, status);
} else {
// Defualt is word iterator.
break_iterator = icu::BreakIterator::createWordInstance(icu_locale, status);
}
if (U_FAILURE(status)) {
delete break_iterator;
return nullptr;
}
isolate->CountUsage(v8::Isolate::UseCounterFeature::kBreakIterator);
return break_iterator;
}
void SetResolvedBreakIteratorSettings(Isolate* isolate,
const icu::Locale& icu_locale,
icu::BreakIterator* break_iterator,
Handle<JSObject> resolved) {
Factory* factory = isolate->factory();
UErrorCode status = U_ZERO_ERROR;
// Set the locale
char result[ULOC_FULLNAME_CAPACITY];
status = U_ZERO_ERROR;
uloc_toLanguageTag(icu_locale.getName(), result, ULOC_FULLNAME_CAPACITY,
FALSE, &status);
if (U_SUCCESS(status)) {
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("locale"),
factory->NewStringFromAsciiChecked(result), LanguageMode::kSloppy)
.Assert();
} else {
// This would never happen, since we got the locale from ICU.
JSObject::SetProperty(
isolate, resolved, factory->NewStringFromStaticChars("locale"),
factory->NewStringFromStaticChars("und"), LanguageMode::kSloppy)
.Assert();
}
}
} // namespace
icu::Locale Intl::CreateICULocale(Isolate* isolate,
Handle<String> bcp47_locale_str) {
v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate);
v8::String::Utf8Value bcp47_locale(v8_isolate,
v8::Utils::ToLocal(bcp47_locale_str));
CHECK_NOT_NULL(*bcp47_locale);
DisallowHeapAllocation no_gc;
// Convert BCP47 into ICU locale format.
UErrorCode status = U_ZERO_ERROR;
char icu_result[ULOC_FULLNAME_CAPACITY];
int icu_length = 0;
// bcp47_locale_str should be a canonicalized language tag, which
// means this shouldn't fail.
uloc_forLanguageTag(*bcp47_locale, icu_result, ULOC_FULLNAME_CAPACITY,
&icu_length, &status);
CHECK(U_SUCCESS(status));
CHECK_LT(0, icu_length);
icu::Locale icu_locale(icu_result);
if (icu_locale.isBogus()) {
FATAL("Failed to create ICU locale, are ICU data files missing?");
}
return icu_locale;
}
// static
icu::SimpleDateFormat* DateFormat::InitializeDateTimeFormat(
Isolate* isolate, Handle<String> locale, Handle<JSObject> options,
Handle<JSObject> resolved) {
icu::Locale icu_locale = Intl::CreateICULocale(isolate, locale);
DCHECK(!icu_locale.isBogus());
icu::SimpleDateFormat* date_format =
CreateICUDateFormat(isolate, icu_locale, options);
if (!date_format) {
// Remove extensions and try again.
icu::Locale no_extension_locale(icu_locale.getBaseName());
date_format = CreateICUDateFormat(isolate, no_extension_locale, options);
if (!date_format) {
FATAL("Failed to create ICU date format, are ICU data files missing?");
}
// Set resolved settings (pattern, numbering system, calendar).
SetResolvedDateSettings(isolate, no_extension_locale, date_format,
resolved);
} else {
SetResolvedDateSettings(isolate, icu_locale, date_format, resolved);
}
CHECK_NOT_NULL(date_format);
return date_format;
}
icu::SimpleDateFormat* DateFormat::UnpackDateFormat(Handle<JSObject> obj) {
return reinterpret_cast<icu::SimpleDateFormat*>(obj->GetEmbedderField(0));
}
void DateFormat::DeleteDateFormat(const v8::WeakCallbackInfo<void>& data) {
delete reinterpret_cast<icu::SimpleDateFormat*>(data.GetInternalField(0));
GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
}
// ecma402/#sec-formatdatetime
// FormatDateTime( dateTimeFormat, x )
MaybeHandle<String> DateFormat::FormatDateTime(
Isolate* isolate, Handle<JSObject> date_time_format_holder, double x) {
double date_value = DateCache::TimeClip(x);
if (std::isnan(date_value)) {
THROW_NEW_ERROR(isolate, NewRangeError(MessageTemplate::kInvalidTimeValue),
String);
}
CHECK(Intl::IsObjectOfType(isolate, date_time_format_holder,
Intl::Type::kDateTimeFormat));
icu::SimpleDateFormat* date_format =
DateFormat::UnpackDateFormat(date_time_format_holder);
CHECK_NOT_NULL(date_format);
icu::UnicodeString result;
date_format->format(date_value, result);
return isolate->factory()->NewStringFromTwoByte(Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(result.getBuffer()), result.length()));
}
// ecma402/#sec-datetime-format-functions
// DateTime Format Functions
MaybeHandle<String> DateFormat::DateTimeFormat(
Isolate* isolate, Handle<JSObject> date_time_format_holder,
Handle<Object> date) {
// 3. If date is not provided or is undefined, then
double x;
if (date->IsUndefined()) {
// 3.a Let x be Call(%Date_now%, undefined).
x = JSDate::CurrentTimeValue(isolate);
} else {
// 4. Else,
// a. Let x be ? ToNumber(date).
ASSIGN_RETURN_ON_EXCEPTION(isolate, date, Object::ToNumber(isolate, date),
String);
CHECK(date->IsNumber());
x = date->Number();
}
// 5. Return FormatDateTime(dtf, x).
return DateFormat::FormatDateTime(isolate, date_time_format_holder, x);
}
icu::DecimalFormat* NumberFormat::InitializeNumberFormat(
Isolate* isolate, Handle<String> locale, Handle<JSObject> options,
Handle<JSObject> resolved) {
icu::Locale icu_locale = Intl::CreateICULocale(isolate, locale);
DCHECK(!icu_locale.isBogus());
icu::DecimalFormat* number_format =
CreateICUNumberFormat(isolate, icu_locale, options);
if (!number_format) {
// Remove extensions and try again.
icu::Locale no_extension_locale(icu_locale.getBaseName());
number_format =
CreateICUNumberFormat(isolate, no_extension_locale, options);
if (!number_format) {
FATAL("Failed to create ICU number format, are ICU data files missing?");
}
// Set resolved settings (pattern, numbering system).
SetResolvedNumberSettings(isolate, no_extension_locale, number_format,
resolved);
} else {
SetResolvedNumberSettings(isolate, icu_locale, number_format, resolved);
}
CHECK_NOT_NULL(number_format);
return number_format;
}
icu::DecimalFormat* NumberFormat::UnpackNumberFormat(Handle<JSObject> obj) {
return reinterpret_cast<icu::DecimalFormat*>(
obj->GetEmbedderField(NumberFormat::kDecimalFormatIndex));
}
void NumberFormat::DeleteNumberFormat(const v8::WeakCallbackInfo<void>& data) {
delete reinterpret_cast<icu::DecimalFormat*>(data.GetInternalField(0));
GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
}
icu::BreakIterator* V8BreakIterator::InitializeBreakIterator(
Isolate* isolate, Handle<String> locale, Handle<JSObject> options,
Handle<JSObject> resolved) {
icu::Locale icu_locale = Intl::CreateICULocale(isolate, locale);
DCHECK(!icu_locale.isBogus());
icu::BreakIterator* break_iterator =
CreateICUBreakIterator(isolate, icu_locale, options);
if (!break_iterator) {
// Remove extensions and try again.
icu::Locale no_extension_locale(icu_locale.getBaseName());
break_iterator =
CreateICUBreakIterator(isolate, no_extension_locale, options);
if (!break_iterator) {
FATAL("Failed to create ICU break iterator, are ICU data files missing?");
}
// Set resolved settings (locale).
SetResolvedBreakIteratorSettings(isolate, no_extension_locale,
break_iterator, resolved);
} else {
SetResolvedBreakIteratorSettings(isolate, icu_locale, break_iterator,
resolved);
}
CHECK_NOT_NULL(break_iterator);
return break_iterator;
}
icu::BreakIterator* V8BreakIterator::UnpackBreakIterator(Handle<JSObject> obj) {
return reinterpret_cast<icu::BreakIterator*>(obj->GetEmbedderField(0));
}
void V8BreakIterator::DeleteBreakIterator(
const v8::WeakCallbackInfo<void>& data) {
delete reinterpret_cast<icu::BreakIterator*>(data.GetInternalField(0));
delete reinterpret_cast<icu::UnicodeString*>(data.GetInternalField(1));
GlobalHandles::Destroy(reinterpret_cast<Object**>(data.GetParameter()));
}
MaybeHandle<String> Intl::ToString(Isolate* isolate,
const icu::UnicodeString& string) {
return isolate->factory()->NewStringFromTwoByte(Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(string.getBuffer()), string.length()));
}
MaybeHandle<String> Intl::ToString(Isolate* isolate,
const icu::UnicodeString& string,
int32_t begin, int32_t end) {
return Intl::ToString(isolate, string.tempSubStringBetween(begin, end));
}
namespace {
Handle<JSObject> InnerAddElement(Isolate* isolate, Handle<JSArray> array,
int index, Handle<String> field_type_string,
Handle<String> value) {
// let element = $array[$index] = {
// type: $field_type_string,
// value: $value
// }
// return element;
Factory* factory = isolate->factory();
Handle<JSObject> element = factory->NewJSObject(isolate->object_function());
JSObject::AddProperty(isolate, element, factory->type_string(),
field_type_string, NONE);
JSObject::AddProperty(isolate, element, factory->value_string(), value, NONE);
JSObject::AddDataElement(array, index, element, NONE);
return element;
}
} // namespace
void Intl::AddElement(Isolate* isolate, Handle<JSArray> array, int index,
Handle<String> field_type_string, Handle<String> value) {
// Same as $array[$index] = {type: $field_type_string, value: $value};
InnerAddElement(isolate, array, index, field_type_string, value);
}
void Intl::AddElement(Isolate* isolate, Handle<JSArray> array, int index,
Handle<String> field_type_string, Handle<String> value,
Handle<String> additional_property_name,
Handle<String> additional_property_value) {
// Same as $array[$index] = {
// type: $field_type_string, value: $value,
// $additional_property_name: $additional_property_value
// }
Handle<JSObject> element =
InnerAddElement(isolate, array, index, field_type_string, value);
JSObject::AddProperty(isolate, element, additional_property_name,
additional_property_value, NONE);
}
// Build the shortened locale; eg, convert xx_Yyyy_ZZ to xx_ZZ.
bool Intl::RemoveLocaleScriptTag(const std::string& icu_locale,
std::string* locale_less_script) {
icu::Locale new_locale = icu::Locale::createCanonical(icu_locale.c_str());
const char* icu_script = new_locale.getScript();
if (icu_script == NULL || strlen(icu_script) == 0) {
*locale_less_script = std::string();
return false;
}
const char* icu_language = new_locale.getLanguage();
const char* icu_country = new_locale.getCountry();
icu::Locale short_locale = icu::Locale(icu_language, icu_country);
const char* icu_name = short_locale.getName();
*locale_less_script = std::string(icu_name);
return true;
}
std::set<std::string> Intl::GetAvailableLocales(const IcuService& service) {
const icu::Locale* icu_available_locales = nullptr;
int32_t count = 0;
std::set<std::string> locales;
switch (service) {
case IcuService::kBreakIterator:
icu_available_locales = icu::BreakIterator::getAvailableLocales(count);
break;
case IcuService::kCollator:
icu_available_locales = icu::Collator::getAvailableLocales(count);
break;
case IcuService::kDateFormat:
icu_available_locales = icu::DateFormat::getAvailableLocales(count);
break;
case IcuService::kNumberFormat:
icu_available_locales = icu::NumberFormat::getAvailableLocales(count);
break;
case IcuService::kPluralRules:
// TODO(littledan): For PluralRules, filter out locales that
// don't support PluralRules.
// PluralRules is missing an appropriate getAvailableLocales method,
// so we should filter from all locales, but it's not clear how; see
// https://ssl.icu-project.org/trac/ticket/12756
icu_available_locales = icu::Locale::getAvailableLocales(count);
break;
case IcuService::kResourceBundle: {
UErrorCode status = U_ZERO_ERROR;
UEnumeration* en = ures_openAvailableLocales(nullptr, &status);
int32_t length = 0;
const char* locale_str = uenum_next(en, &length, &status);
while (U_SUCCESS(status) && (locale_str != nullptr)) {
std::string locale(locale_str, length);
std::replace(locale.begin(), locale.end(), '_', '-');
locales.insert(locale);
std::string shortened_locale;
if (Intl::RemoveLocaleScriptTag(locale_str, &shortened_locale)) {
std::replace(shortened_locale.begin(), shortened_locale.end(), '_',
'-');
locales.insert(shortened_locale);
}
locale_str = uenum_next(en, &length, &status);
}
uenum_close(en);
return locales;
}
case IcuService::kRelativeDateTimeFormatter: {
// ICU RelativeDateTimeFormatter does not provide a getAvailableLocales()
// interface, because RelativeDateTimeFormatter depends on
// 1. NumberFormat and 2. ResourceBundle, return the
// intersection of these two set.
// ICU FR at https://unicode-org.atlassian.net/browse/ICU-20009
// TODO(ftang): change to call ICU's getAvailableLocales() after it is
// added.
std::set<std::string> number_format_set(
Intl::GetAvailableLocales(IcuService::kNumberFormat));
std::set<std::string> resource_bundle_set(
Intl::GetAvailableLocales(IcuService::kResourceBundle));
set_intersection(resource_bundle_set.begin(), resource_bundle_set.end(),
number_format_set.begin(), number_format_set.end(),
std::inserter(locales, locales.begin()));
return locales;
}
case IcuService::kListFormatter: {
// TODO(ftang): for now just use
// icu::Locale::getAvailableLocales(count) until we migrate to
// Intl::GetAvailableLocales().
// ICU FR at https://unicode-org.atlassian.net/browse/ICU-20015
icu_available_locales = icu::Locale::getAvailableLocales(count);
break;
}
}
UErrorCode error = U_ZERO_ERROR;
char result[ULOC_FULLNAME_CAPACITY];
for (int32_t i = 0; i < count; ++i) {
const char* icu_name = icu_available_locales[i].getName();
error = U_ZERO_ERROR;
// No need to force strict BCP47 rules.
uloc_toLanguageTag(icu_name, result, ULOC_FULLNAME_CAPACITY, FALSE, &error);
if (U_FAILURE(error) || error == U_STRING_NOT_TERMINATED_WARNING) {
// This shouldn't happen, but lets not break the user.
continue;
}
std::string locale(result);
locales.insert(locale);
std::string shortened_locale;
if (Intl::RemoveLocaleScriptTag(icu_name, &shortened_locale)) {
std::replace(shortened_locale.begin(), shortened_locale.end(), '_', '-');
locales.insert(shortened_locale);
}
}
return locales;
}
IcuService Intl::StringToIcuService(Handle<String> service) {
if (service->IsUtf8EqualTo(CStrVector("collator"))) {
return IcuService::kCollator;
} else if (service->IsUtf8EqualTo(CStrVector("numberformat"))) {
return IcuService::kNumberFormat;
} else if (service->IsUtf8EqualTo(CStrVector("dateformat"))) {
return IcuService::kDateFormat;
} else if (service->IsUtf8EqualTo(CStrVector("breakiterator"))) {
return IcuService::kBreakIterator;
} else if (service->IsUtf8EqualTo(CStrVector("pluralrules"))) {
return IcuService::kPluralRules;
} else if (service->IsUtf8EqualTo(CStrVector("relativetimeformat"))) {
return IcuService::kRelativeDateTimeFormatter;
} else if (service->IsUtf8EqualTo(CStrVector("listformat"))) {
return IcuService::kListFormatter;
}
UNREACHABLE();
}
V8_WARN_UNUSED_RESULT MaybeHandle<JSObject> Intl::AvailableLocalesOf(
Isolate* isolate, Handle<String> service) {
Factory* factory = isolate->factory();
std::set<std::string> results =
Intl::GetAvailableLocales(StringToIcuService(service));
Handle<JSObject> locales = factory->NewJSObjectWithNullProto();
int32_t i = 0;
for (auto iter = results.begin(); iter != results.end(); ++iter) {
RETURN_ON_EXCEPTION(
isolate,
JSObject::SetOwnPropertyIgnoreAttributes(
locales, factory->NewStringFromAsciiChecked(iter->c_str()),
factory->NewNumber(i++), NONE),
JSObject);
}
return locales;
}
std::string Intl::DefaultLocale(Isolate* isolate) {
if (isolate->default_locale().empty()) {
icu::Locale default_locale;
// Translate ICU's fallback locale to a well-known locale.
if (strcmp(default_locale.getName(), "en_US_POSIX") == 0) {
isolate->set_default_locale("en-US");
} else {
// Set the locale
char result[ULOC_FULLNAME_CAPACITY];
UErrorCode status = U_ZERO_ERROR;
int32_t length =
uloc_toLanguageTag(default_locale.getName(), result,
ULOC_FULLNAME_CAPACITY, FALSE, &status);
isolate->set_default_locale(
U_SUCCESS(status) ? std::string(result, length) : "und");
}
DCHECK(!isolate->default_locale().empty());
}
return isolate->default_locale();
}
bool Intl::IsObjectOfType(Isolate* isolate, Handle<Object> input,
Intl::Type expected_type) {
if (!input->IsJSObject()) return false;
Handle<JSObject> obj = Handle<JSObject>::cast(input);
Handle<Symbol> marker = isolate->factory()->intl_initialized_marker_symbol();
Handle<Object> tag = JSReceiver::GetDataProperty(obj, marker);
if (!tag->IsSmi()) return false;
Intl::Type type = Intl::TypeFromSmi(Smi::cast(*tag));
return type == expected_type;
}
namespace {
// In ECMA 402 v1, Intl constructors supported a mode of operation
// where calling them with an existing object as a receiver would
// transform the receiver into the relevant Intl instance with all
// internal slots. In ECMA 402 v2, this capability was removed, to
// avoid adding internal slots on existing objects. In ECMA 402 v3,
// the capability was re-added as "normative optional" in a mode
// which chains the underlying Intl instance on any object, when the
// constructor is called
//
// See ecma402/#legacy-constructor.
MaybeHandle<Object> LegacyUnwrapReceiver(Isolate* isolate,
Handle<JSReceiver> receiver,
Handle<JSFunction> constructor,
Intl::Type type) {
bool has_initialized_slot = Intl::IsObjectOfType(isolate, receiver, type);
Handle<Object> obj_is_instance_of;
ASSIGN_RETURN_ON_EXCEPTION(isolate, obj_is_instance_of,
Object::InstanceOf(isolate, receiver, constructor),
Object);
bool is_instance_of = obj_is_instance_of->BooleanValue(isolate);
// 2. If receiver does not have an [[Initialized...]] internal slot
// and ? InstanceofOperator(receiver, constructor) is true, then
if (!has_initialized_slot && is_instance_of) {
// 2. a. Let new_receiver be ? Get(receiver, %Intl%.[[FallbackSymbol]]).
Handle<Object> new_receiver;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, new_receiver,
JSReceiver::GetProperty(isolate, receiver,
isolate->factory()->intl_fallback_symbol()),
Object);
return new_receiver;
}
return receiver;
}
} // namespace
MaybeHandle<JSObject> Intl::UnwrapReceiver(Isolate* isolate,
Handle<JSReceiver> receiver,
Handle<JSFunction> constructor,
Intl::Type type,
Handle<String> method_name,
bool check_legacy_constructor) {
DCHECK(type == Intl::Type::kCollator || type == Intl::Type::kNumberFormat ||
type == Intl::Type::kDateTimeFormat ||
type == Intl::Type::kBreakIterator);
Handle<Object> new_receiver = receiver;
if (check_legacy_constructor) {
ASSIGN_RETURN_ON_EXCEPTION(
isolate, new_receiver,
LegacyUnwrapReceiver(isolate, receiver, constructor, type), JSObject);
}
// Collator has been ported to use regular instance types. We
// shouldn't be using Intl::IsObjectOfType anymore.
if (type == Intl::Type::kCollator) {
if (!receiver->IsJSCollator()) {
// 3. a. Throw a TypeError exception.
THROW_NEW_ERROR(isolate,
NewTypeError(MessageTemplate::kIncompatibleMethodReceiver,
method_name, receiver),
JSObject);
}
return Handle<JSCollator>::cast(receiver);
}
DCHECK_NE(type, Intl::Type::kCollator);
// 3. If Type(new_receiver) is not Object or nf does not have an
// [[Initialized...]] internal slot, then
if (!Intl::IsObjectOfType(isolate, new_receiver, type)) {
// 3. a. Throw a TypeError exception.
THROW_NEW_ERROR(isolate,
NewTypeError(MessageTemplate::kIncompatibleMethodReceiver,
method_name, receiver),
JSObject);
}
// The above IsObjectOfType returns true only for JSObjects, which
// makes this cast safe.
return Handle<JSObject>::cast(new_receiver);
}
MaybeHandle<JSObject> NumberFormat::Unwrap(Isolate* isolate,
Handle<JSReceiver> receiver,
const char* method_name) {
Handle<Context> native_context =
Handle<Context>(isolate->context()->native_context(), isolate);
Handle<JSFunction> constructor = Handle<JSFunction>(
JSFunction::cast(native_context->intl_number_format_function()), isolate);
Handle<String> method_name_str =
isolate->factory()->NewStringFromAsciiChecked(method_name);
return Intl::UnwrapReceiver(isolate, receiver, constructor,
Intl::Type::kNumberFormat, method_name_str, true);
}
MaybeHandle<String> NumberFormat::FormatNumber(
Isolate* isolate, Handle<JSObject> number_format_holder, double value) {
icu::DecimalFormat* number_format =
NumberFormat::UnpackNumberFormat(number_format_holder);
CHECK_NOT_NULL(number_format);
icu::UnicodeString result;
number_format->format(value, result);
return isolate->factory()->NewStringFromTwoByte(Vector<const uint16_t>(
reinterpret_cast<const uint16_t*>(result.getBuffer()), result.length()));
}
void Intl::DefineWEProperty(Isolate* isolate, Handle<JSObject> target,
Handle<Name> key, Handle<Object> value) {
PropertyDescriptor desc;
desc.set_writable(true);
desc.set_enumerable(true);
desc.set_value(value);
Maybe<bool> success =
JSReceiver::DefineOwnProperty(isolate, target, key, &desc, kDontThrow);
DCHECK(success.IsJust() && success.FromJust());
USE(success);
}
namespace {
// Define general regexp macros.
// Note "(?:" means the regexp group a non-capture group.
#define REGEX_ALPHA "[a-z]"
#define REGEX_DIGIT "[0-9]"
#define REGEX_ALPHANUM "(?:" REGEX_ALPHA "|" REGEX_DIGIT ")"
void BuildLanguageTagRegexps(Isolate* isolate) {
// Define the language tag regexp macros.
// For info on BCP 47 see https://tools.ietf.org/html/bcp47 .
// Because language tags are case insensitive per BCP 47 2.1.1 and regexp's
// defined below will always be used after lowercasing the input, uppercase
// ranges in BCP 47 2.1 are dropped and grandfathered tags are all lowercased.
// clang-format off
#define BCP47_REGULAR \
"(?:art-lojban|cel-gaulish|no-bok|no-nyn|zh-guoyu|zh-hakka|" \
"zh-min|zh-min-nan|zh-xiang)"
#define BCP47_IRREGULAR \
"(?:en-gb-oed|i-ami|i-bnn|i-default|i-enochian|i-hak|" \
"i-klingon|i-lux|i-mingo|i-navajo|i-pwn|i-tao|i-tay|" \
"i-tsu|sgn-be-fr|sgn-be-nl|sgn-ch-de)"
#define BCP47_GRANDFATHERED "(?:" BCP47_IRREGULAR "|" BCP47_REGULAR ")"
#define BCP47_PRIVATE_USE "(?:x(?:-" REGEX_ALPHANUM "{1,8})+)"
#define BCP47_SINGLETON "(?:" REGEX_DIGIT "|" "[a-wy-z])"
#define BCP47_EXTENSION "(?:" BCP47_SINGLETON "(?:-" REGEX_ALPHANUM "{2,8})+)"
#define BCP47_VARIANT \
"(?:" REGEX_ALPHANUM "{5,8}" "|" "(?:" REGEX_DIGIT REGEX_ALPHANUM "{3}))"
#define BCP47_REGION "(?:" REGEX_ALPHA "{2}" "|" REGEX_DIGIT "{3})"
#define BCP47_SCRIPT "(?:" REGEX_ALPHA "{4})"
#define BCP47_EXT_LANG "(?:" REGEX_ALPHA "{3}(?:-" REGEX_ALPHA "{3}){0,2})"
#define BCP47_LANGUAGE "(?:" REGEX_ALPHA "{2,3}(?:-" BCP47_EXT_LANG ")?" \
"|" REGEX_ALPHA "{4}" "|" REGEX_ALPHA "{5,8})"
#define BCP47_LANG_TAG \
BCP47_LANGUAGE \
"(?:-" BCP47_SCRIPT ")?" \
"(?:-" BCP47_REGION ")?" \
"(?:-" BCP47_VARIANT ")*" \
"(?:-" BCP47_EXTENSION ")*" \
"(?:-" BCP47_PRIVATE_USE ")?"
// clang-format on
constexpr char kLanguageTagSingletonRegexp[] = "^" BCP47_SINGLETON "$";
constexpr char kLanguageTagVariantRegexp[] = "^" BCP47_VARIANT "$";
constexpr char kLanguageTagRegexp[] =
"^(?:" BCP47_LANG_TAG "|" BCP47_PRIVATE_USE "|" BCP47_GRANDFATHERED ")$";
UErrorCode status = U_ZERO_ERROR;
icu::RegexMatcher* language_singleton_regexp_matcher = new icu::RegexMatcher(
icu::UnicodeString(kLanguageTagSingletonRegexp, -1, US_INV), 0, status);
icu::RegexMatcher* language_tag_regexp_matcher = new icu::RegexMatcher(
icu::UnicodeString(kLanguageTagRegexp, -1, US_INV), 0, status);
icu::RegexMatcher* language_variant_regexp_matcher = new icu::RegexMatcher(
icu::UnicodeString(kLanguageTagVariantRegexp, -1, US_INV), 0, status);
CHECK(U_SUCCESS(status));
isolate->set_language_tag_regexp_matchers(language_singleton_regexp_matcher,
language_tag_regexp_matcher,
language_variant_regexp_matcher);
// Undefine the language tag regexp macros.
#undef BCP47_EXTENSION
#undef BCP47_EXT_LANG
#undef BCP47_GRANDFATHERED
#undef BCP47_IRREGULAR
#undef BCP47_LANG_TAG
#undef BCP47_LANGUAGE
#undef BCP47_PRIVATE_USE
#undef BCP47_REGION
#undef BCP47_REGULAR
#undef BCP47_SCRIPT
#undef BCP47_SINGLETON
#undef BCP47_VARIANT
}
// Undefine the general regexp macros.
#undef REGEX_ALPHA
#undef REGEX_DIGIT
#undef REGEX_ALPHANUM
icu::RegexMatcher* GetLanguageSingletonRegexMatcher(Isolate* isolate) {
icu::RegexMatcher* language_singleton_regexp_matcher =
isolate->language_singleton_regexp_matcher();
if (language_singleton_regexp_matcher == nullptr) {
BuildLanguageTagRegexps(isolate);
language_singleton_regexp_matcher =
isolate->language_singleton_regexp_matcher();
}
return language_singleton_regexp_matcher;
}
icu::RegexMatcher* GetLanguageTagRegexMatcher(Isolate* isolate) {
icu::RegexMatcher* language_tag_regexp_matcher =
isolate->language_tag_regexp_matcher();
if (language_tag_regexp_matcher == nullptr) {
BuildLanguageTagRegexps(isolate);
language_tag_regexp_matcher = isolate->language_tag_regexp_matcher();
}
return language_tag_regexp_matcher;
}
icu::RegexMatcher* GetLanguageVariantRegexMatcher(Isolate* isolate) {
icu::RegexMatcher* language_variant_regexp_matcher =
isolate->language_variant_regexp_matcher();
if (language_variant_regexp_matcher == nullptr) {
BuildLanguageTagRegexps(isolate);
language_variant_regexp_matcher =
isolate->language_variant_regexp_matcher();
}
return language_variant_regexp_matcher;
}
} // anonymous namespace
MaybeHandle<JSObject> Intl::ResolveLocale(Isolate* isolate, const char* service,
Handle<Object> requestedLocales,
Handle<Object> options) {
Handle<String> service_str =
isolate->factory()->NewStringFromAsciiChecked(service);
Handle<JSFunction> resolve_locale_function = isolate->resolve_locale();
Handle<Object> result;
Handle<Object> undefined_value = isolate->factory()->undefined_value();
Handle<Object> args[] = {service_str, requestedLocales, options};
ASSIGN_RETURN_ON_EXCEPTION(
isolate, result,
Execution::Call(isolate, resolve_locale_function, undefined_value,
arraysize(args), args),
JSObject);
return Handle<JSObject>::cast(result);
}
MaybeHandle<JSObject> Intl::CanonicalizeLocaleListJS(Isolate* isolate,
Handle<Object> locales) {
Handle<JSFunction> canonicalize_locale_list_function =
isolate->canonicalize_locale_list();
Handle<Object> result;
Handle<Object> undefined_value = isolate->factory()->undefined_value();
Handle<Object> args[] = {locales};
ASSIGN_RETURN_ON_EXCEPTION(
isolate, result,
Execution::Call(isolate, canonicalize_locale_list_function,
undefined_value, arraysize(args), args),
JSObject);
return Handle<JSObject>::cast(result);
}
Maybe<bool> Intl::GetStringOption(Isolate* isolate, Handle<JSReceiver> options,
const char* property,
std::vector<const char*> values,
const char* service,
std::unique_ptr<char[]>* result) {
Handle<String> property_str =
isolate->factory()->NewStringFromAsciiChecked(property);
// 1. Let value be ? Get(options, property).
Handle<Object> value;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, value,
Object::GetPropertyOrElement(isolate, options, property_str),
Nothing<bool>());
if (value->IsUndefined(isolate)) {
return Just(false);
}
// 2. c. Let value be ? ToString(value).
Handle<String> value_str;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, value_str, Object::ToString(isolate, value), Nothing<bool>());
std::unique_ptr<char[]> value_cstr = value_str->ToCString();
// 2. d. if values is not undefined, then
if (values.size() > 0) {
// 2. d. i. If values does not contain an element equal to value,
// throw a RangeError exception.
for (size_t i = 0; i < values.size(); i++) {
if (strcmp(values.at(i), value_cstr.get()) == 0) {
// 2. e. return value
*result = std::move(value_cstr);
return Just(true);
}
}
Handle<String> service_str =
isolate->factory()->NewStringFromAsciiChecked(service);
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(MessageTemplate::kValueOutOfRange, value, service_str,
property_str),
Nothing<bool>());
}
// 2. e. return value
*result = std::move(value_cstr);
return Just(true);
}
V8_WARN_UNUSED_RESULT Maybe<bool> Intl::GetBoolOption(
Isolate* isolate, Handle<JSReceiver> options, const char* property,
const char* service, bool* result) {
Handle<String> property_str =
isolate->factory()->NewStringFromAsciiChecked(property);
// 1. Let value be ? Get(options, property).
Handle<Object> value;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, value,
Object::GetPropertyOrElement(isolate, options, property_str),
Nothing<bool>());
// 2. If value is not undefined, then
if (!value->IsUndefined(isolate)) {
// 2. b. i. Let value be ToBoolean(value).
*result = value->BooleanValue(isolate);
// 2. e. return value
return Just(true);
}
return Just(false);
}
namespace {
char AsciiToLower(char c) {
if (c < 'A' || c > 'Z') {
return c;
}
return c | (1 << 5);
}
/**
* Check the structural Validity of the language tag per ECMA 402 6.2.2:
* - Well-formed per RFC 5646 2.1
* - There are no duplicate variant subtags
* - There are no duplicate singleton (extension) subtags
*
* One extra-check is done (from RFC 5646 2.2.9): the tag is compared
* against the list of grandfathered tags. However, subtags for
* primary/extended language, script, region, variant are not checked
* against the IANA language subtag registry.
*
* ICU is too permissible and lets invalid tags, like
* hant-cmn-cn, through.
*
* Returns false if the language tag is invalid.
*/
bool IsStructurallyValidLanguageTag(Isolate* isolate,
const std::string& locale_in) {
if (!String::IsAscii(locale_in.c_str(),
static_cast<int>(locale_in.length()))) {
return false;
}
std::string locale(locale_in);
icu::RegexMatcher* language_tag_regexp_matcher =
GetLanguageTagRegexMatcher(isolate);
// Check if it's well-formed, including grandfathered tags.
icu::UnicodeString locale_uni(locale.c_str(), -1, US_INV);
// Note: icu::RegexMatcher::reset does not make a copy of the input string
// so cannot use a temp value; ie: cannot create it as a call parameter.
language_tag_regexp_matcher->reset(locale_uni);
UErrorCode status = U_ZERO_ERROR;
bool is_valid_lang_tag = language_tag_regexp_matcher->matches(status);
if (!is_valid_lang_tag || V8_UNLIKELY(U_FAILURE(status))) {
return false;
}
// Just return if it's a x- form. It's all private.
if (locale.find("x-") == 0) {
return true;
}
// Check if there are any duplicate variants or singletons (extensions).
// Remove private use section.
locale = locale.substr(0, locale.find("-x-"));
// Skip language since it can match variant regex, so we start from 1.
// We are matching i-klingon here, but that's ok, since i-klingon-klingon
// is not valid and would fail LANGUAGE_TAG_RE test.
size_t pos = 0;
std::vector<std::string> parts;
while ((pos = locale.find("-")) != std::string::npos) {
std::string token = locale.substr(0, pos);
parts.push_back(token);
locale = locale.substr(pos + 1);
}
if (locale.length() != 0) {
parts.push_back(locale);
}
icu::RegexMatcher* language_variant_regexp_matcher =
GetLanguageVariantRegexMatcher(isolate);
icu::RegexMatcher* language_singleton_regexp_matcher =
GetLanguageSingletonRegexMatcher(isolate);
std::vector<std::string> variants;
std::vector<std::string> extensions;
for (auto it = parts.begin() + 1; it != parts.end(); it++) {
icu::UnicodeString part(it->data(), -1, US_INV);
language_variant_regexp_matcher->reset(part);
bool is_language_variant = language_variant_regexp_matcher->matches(status);
if (V8_UNLIKELY(U_FAILURE(status))) {
return false;
}
if (is_language_variant && extensions.size() == 0) {
if (std::find(variants.begin(), variants.end(), *it) == variants.end()) {
variants.push_back(*it);
} else {
return false;
}
}
language_singleton_regexp_matcher->reset(part);
bool is_language_singleton =
language_singleton_regexp_matcher->matches(status);
if (V8_UNLIKELY(U_FAILURE(status))) {
return false;
}
if (is_language_singleton) {
if (std::find(extensions.begin(), extensions.end(), *it) ==
extensions.end()) {
extensions.push_back(*it);
} else {
return false;
}
}
}
return true;
}
bool IsLowerAscii(char c) { return c >= 'a' && c < 'z'; }
bool IsTwoLetterLanguage(const std::string& locale) {
// Two letters, both in range 'a'-'z'...
return locale.length() == 2 && IsLowerAscii(locale[0]) &&
IsLowerAscii(locale[1]);
}
bool IsDeprecatedLanguage(const std::string& locale) {
// Check if locale is one of the deprecated language tags:
return locale == "in" || locale == "iw" || locale == "ji" || locale == "jw";
}
// Reference:
// https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
bool IsGrandfatheredTagWithoutPreferredVaule(const std::string& locale) {
if (V8_UNLIKELY(locale == "zh-min" || locale == "cel-gaulish")) return true;
if (locale.length() > 6 /* i-mingo is 7 chars long */ &&
V8_UNLIKELY(locale[0] == 'i' && locale[1] == '-')) {
return locale.substr(2) == "default" || locale.substr(2) == "enochian" ||
locale.substr(2) == "mingo";
}
return false;
}
} // anonymous namespace
Maybe<std::string> Intl::CanonicalizeLanguageTag(Isolate* isolate,
Handle<Object> locale_in) {
Handle<String> locale_str;
// This does part of the validity checking spec'ed in CanonicalizeLocaleList:
// 7c ii. If Type(kValue) is not String or Object, throw a TypeError
// exception.
// 7c iii. Let tag be ? ToString(kValue).
// 7c iv. If IsStructurallyValidLanguageTag(tag) is false, throw a
// RangeError exception.
if (locale_in->IsString()) {
locale_str = Handle<String>::cast(locale_in);
} else if (locale_in->IsJSReceiver()) {
ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, locale_str,
Object::ToString(isolate, locale_in),
Nothing<std::string>());
} else {
THROW_NEW_ERROR_RETURN_VALUE(isolate,
NewTypeError(MessageTemplate::kLanguageID),
Nothing<std::string>());
}
std::string locale(locale_str->ToCString().get());
// Optimize for the most common case: a 2-letter language code in the
// canonical form/lowercase that is not one of the deprecated codes
// (in, iw, ji, jw). Don't check for ~70 of 3-letter deprecated language
// codes. Instead, let them be handled by ICU in the slow path. However,
// fast-track 'fil' (3-letter canonical code).
if ((IsTwoLetterLanguage(locale) && !IsDeprecatedLanguage(locale)) ||
locale == "fil") {
return Just(locale);
}
// Because per BCP 47 2.1.1 language tags are case-insensitive, lowercase
// the input before any more check.
std::transform(locale.begin(), locale.end(), locale.begin(), AsciiToLower);
if (!IsStructurallyValidLanguageTag(isolate, locale)) {
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(MessageTemplate::kInvalidLanguageTag, locale_str),
Nothing<std::string>());
}
// ICU maps a few grandfathered tags to what looks like a regular language
// tag even though IANA language tag registry does not have a preferred
// entry map for them. Return them as they're with lowercasing.
if (IsGrandfatheredTagWithoutPreferredVaule(locale)) {
return Just(locale);
}
// // ECMA 402 6.2.3
// TODO(jshin): uloc_{for,to}TanguageTag can fail even for a structually valid
// language tag if it's too long (much longer than 100 chars). Even if we
// allocate a longer buffer, ICU will still fail if it's too long. Either
// propose to Ecma 402 to put a limit on the locale length or change ICU to
// handle long locale names better. See
// https://unicode-org.atlassian.net/browse/ICU-13417
UErrorCode error = U_ZERO_ERROR;
char icu_result[ULOC_FULLNAME_CAPACITY];
uloc_forLanguageTag(locale.c_str(), icu_result, ULOC_FULLNAME_CAPACITY,
nullptr, &error);
if (U_FAILURE(error) || error == U_STRING_NOT_TERMINATED_WARNING) {
// TODO(jshin): This should not happen because the structural validity
// is already checked. If that's the case, remove this.
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(MessageTemplate::kInvalidLanguageTag, locale_str),
Nothing<std::string>());
}
// Force strict BCP47 rules.
char result[ULOC_FULLNAME_CAPACITY];
int32_t result_len = uloc_toLanguageTag(icu_result, result,
ULOC_FULLNAME_CAPACITY, TRUE, &error);
if (U_FAILURE(error)) {
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(MessageTemplate::kInvalidLanguageTag, locale_str),
Nothing<std::string>());
}
return Just(std::string(result, result_len));
}
Maybe<std::vector<std::string>> Intl::CanonicalizeLocaleList(
Isolate* isolate, Handle<Object> locales, bool only_return_one_result) {
// 1. If locales is undefined, then
if (locales->IsUndefined(isolate)) {
// 1a. Return a new empty List.
return Just(std::vector<std::string>());
}
// 2. Let seen be a new empty List.
std::vector<std::string> seen;
// 3. If Type(locales) is String, then
if (locales->IsString()) {
// 3a. Let O be CreateArrayFromList(« locales »).
// Instead of creating a one-element array and then iterating over it,
// we inline the body of the iteration:
std::string canonicalized_tag;
if (!CanonicalizeLanguageTag(isolate, locales).To(&canonicalized_tag)) {
return Nothing<std::vector<std::string>>();
}
seen.push_back(canonicalized_tag);
return Just(seen);
}
// 4. Else,
// 4a. Let O be ? ToObject(locales).
Handle<JSReceiver> o;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, o,
Object::ToObject(isolate, locales),
Nothing<std::vector<std::string>>());
// 5. Let len be ? ToLength(? Get(O, "length")).
Handle<Object> length_obj;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, length_obj,
Object::GetLengthFromArrayLike(isolate, o),
Nothing<std::vector<std::string>>());
// TODO(jkummerow): Spec violation: strictly speaking, we have to iterate
// up to 2^53-1 if {length_obj} says so. Since cases above 2^32 probably
// don't happen in practice (and would be very slow if they do), we'll keep
// the code simple for now by using a saturating to-uint32 conversion.
double raw_length = length_obj->Number();
uint32_t len =
raw_length >= kMaxUInt32 ? kMaxUInt32 : static_cast<uint32_t>(raw_length);
// 6. Let k be 0.
// 7. Repeat, while k < len
for (uint32_t k = 0; k < len; k++) {
// 7a. Let Pk be ToString(k).
// 7b. Let kPresent be ? HasProperty(O, Pk).
LookupIterator it(isolate, o, k);
// 7c. If kPresent is true, then
if (!it.IsFound()) continue;
// 7c i. Let kValue be ? Get(O, Pk).
Handle<Object> k_value;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, k_value, Object::GetProperty(&it),
Nothing<std::vector<std::string>>());
// 7c ii. If Type(kValue) is not String or Object, throw a TypeError
// exception.
// 7c iii. Let tag be ? ToString(kValue).
// 7c iv. If IsStructurallyValidLanguageTag(tag) is false, throw a
// RangeError exception.
// 7c v. Let canonicalizedTag be CanonicalizeLanguageTag(tag).
std::string canonicalized_tag;
if (!CanonicalizeLanguageTag(isolate, k_value).To(&canonicalized_tag)) {
return Nothing<std::vector<std::string>>();
}
// 7c vi. If canonicalizedTag is not an element of seen, append
// canonicalizedTag as the last element of seen.
if (std::find(seen.begin(), seen.end(), canonicalized_tag) == seen.end()) {
seen.push_back(canonicalized_tag);
}
// 7d. Increase k by 1. (See loop header.)
// Optimization: some callers only need one result.
if (only_return_one_result) return Just(seen);
}
// 8. Return seen.
return Just(seen);
}
// ecma-402/#sec-currencydigits
Handle<Smi> Intl::CurrencyDigits(Isolate* isolate, Handle<String> currency) {
v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(isolate);
v8::String::Value currency_string(v8_isolate, v8::Utils::ToLocal(currency));
CHECK_NOT_NULL(*currency_string);
DisallowHeapAllocation no_gc;
UErrorCode status = U_ZERO_ERROR;
uint32_t fraction_digits = ucurr_getDefaultFractionDigits(
reinterpret_cast<const UChar*>(*currency_string), &status);
// For missing currency codes, default to the most common, 2
if (U_FAILURE(status)) fraction_digits = 2;
return Handle<Smi>(Smi::FromInt(fraction_digits), isolate);
}
MaybeHandle<JSObject> Intl::CreateNumberFormat(Isolate* isolate,
Handle<String> locale,
Handle<JSObject> options,
Handle<JSObject> resolved) {
Handle<JSFunction> constructor(
isolate->native_context()->intl_number_format_function(), isolate);
Handle<JSObject> local_object;
ASSIGN_RETURN_ON_EXCEPTION(isolate, local_object,
JSObject::New(constructor, constructor), JSObject);
// Set number formatter as embedder field of the resulting JS object.
icu::DecimalFormat* number_format =
NumberFormat::InitializeNumberFormat(isolate, locale, options, resolved);
CHECK_NOT_NULL(number_format);
local_object->SetEmbedderField(NumberFormat::kDecimalFormatIndex,
reinterpret_cast<Smi*>(number_format));
Handle<Object> wrapper = isolate->global_handles()->Create(*local_object);
GlobalHandles::MakeWeak(wrapper.location(), wrapper.location(),
NumberFormat::DeleteNumberFormat,
WeakCallbackType::kInternalFields);
return local_object;
}
/**
* Parses Unicode extension into key - value map.
* Returns empty object if the extension string is invalid.
* We are not concerned with the validity of the values at this point.
* 'attribute' in RFC 6047 is not supported. Keys without explicit
* values are assigned UNDEFINED.
* TODO(jshin): Fix the handling of 'attribute' (in RFC 6047, but none
* has been defined so that it's not used) and boolean keys without
* an explicit value.
*/
void Intl::ParseExtension(Isolate* isolate, const std::string& extension,
std::map<std::string, std::string>& out) {
if (extension.compare(0, 3, "-u-") != 0) return;
// Key is {2}alphanum, value is {3,8}alphanum.
// Some keys may not have explicit values (booleans).
std::string key;
std::string value;
// Skip the "-u-".
size_t start = 3;
size_t end;
do {
end = extension.find("-", start);
size_t length =
(end == std::string::npos) ? extension.length() - start : end - start;
std::string element = extension.substr(start, length);
// Key is {2}alphanum
if (length == 2) {
if (!key.empty()) {
out.insert(std::pair<std::string, std::string>(key, value));
value.clear();
}
key = element;
// value is {3,8}alphanum.
} else if (length >= 3 && length <= 8 && !key.empty()) {
value = value.empty() ? element : (value + "-" + element);
} else {
return;
}
start = end + 1;
} while (end != std::string::npos);
if (!key.empty()) out.insert(std::pair<std::string, std::string>(key, value));
}
namespace {
bool IsAToZ(char ch) {
return IsInRange(AsciiAlphaToLower(ch), 'a', 'z');
}
// The following are temporary function calling back into js code in
// src/js/intl.js to call pre-existing functions until they are all moved to C++
// under src/objects/*.
// TODO(ftang): remove these temp function after bstell move them from js into
// C++
MaybeHandle<JSObject> CachedOrNewService(Isolate* isolate,
Handle<String> service,
Handle<Object> locales,
Handle<Object> options) {
Handle<Object> result;
Handle<Object> undefined_value(ReadOnlyRoots(isolate).undefined_value(),
isolate);
Handle<Object> args[] = {service, locales, options};
ASSIGN_RETURN_ON_EXCEPTION(
isolate, result,
Execution::Call(isolate, isolate->cached_or_new_service(),
undefined_value, arraysize(args), args),
JSArray);
return Handle<JSObject>::cast(result);
}
} // namespace
// Verifies that the input is a well-formed ISO 4217 currency code.
// ecma402/#sec-currency-codes
bool Intl::IsWellFormedCurrencyCode(Isolate* isolate, Handle<String> currency) {
// 2. If the number of elements in normalized is not 3, return false.
if (currency->length() != 3) return false;
currency = String::Flatten(isolate, currency);
{
DisallowHeapAllocation no_gc;
String::FlatContent flat = currency->GetFlatContent();
// 1. Let normalized be the result of mapping currency to upper case as
// described in 6.1. 3. If normalized contains any character that is not in
// the range "A" to "Z" (U+0041 to U+005A), return false. 4. Return true.
// Don't uppercase to test. It could convert invalid code into a valid one.
// For example \u00DFP (Eszett+P) becomes SSP.
return (IsAToZ(flat.Get(0)) && IsAToZ(flat.Get(1)) && IsAToZ(flat.Get(2)));
}
}
// ecma402 #sup-string.prototype.tolocalelowercase
// ecma402 #sup-string.prototype.tolocaleuppercase
MaybeHandle<String> Intl::StringLocaleConvertCase(Isolate* isolate,
Handle<String> s,
bool to_upper,
Handle<Object> locales) {
std::vector<std::string> requested_locales;
if (!CanonicalizeLocaleList(isolate, locales, true).To(&requested_locales)) {
return MaybeHandle<String>();
}
std::string requested_locale = requested_locales.size() == 0
? Intl::DefaultLocale(isolate)
: requested_locales[0];
size_t dash = requested_locale.find("-");
if (dash != std::string::npos) {
requested_locale = requested_locale.substr(0, dash);
}
// Primary language tag can be up to 8 characters long in theory.
// https://tools.ietf.org/html/bcp47#section-2.2.1
DCHECK_LE(requested_locale.length(), 8);
s = String::Flatten(isolate, s);
// All the languages requiring special-handling have two-letter codes.
// Note that we have to check for '!= 2' here because private-use language
// tags (x-foo) or grandfathered irregular tags (e.g. i-enochian) would have
// only 'x' or 'i' when they get here.
if (V8_UNLIKELY(requested_locale.length() != 2)) {
return ConvertCase(s, to_upper, isolate);
}
// TODO(jshin): Consider adding a fast path for ASCII or Latin-1. The fastpath
// in the root locale needs to be adjusted for az, lt and tr because even case
// mapping of ASCII range characters are different in those locales.
// Greek (el) does not require any adjustment.
if (V8_UNLIKELY((requested_locale == "tr") || (requested_locale == "el") ||
(requested_locale == "lt") || (requested_locale == "az"))) {
return LocaleConvertCase(s, isolate, to_upper, requested_locale.c_str());
} else {
return ConvertCase(s, to_upper, isolate);
}
}
MaybeHandle<Object> Intl::StringLocaleCompare(Isolate* isolate,
Handle<String> string1,
Handle<String> string2,
Handle<Object> locales,
Handle<Object> options) {
Factory* factory = isolate->factory();
Handle<JSObject> collator;
ASSIGN_RETURN_ON_EXCEPTION(
isolate, collator,
CachedOrNewService(isolate, factory->NewStringFromStaticChars("collator"),
locales, options),
Object);
CHECK(collator->IsJSCollator());
return Intl::CompareStrings(isolate, Handle<JSCollator>::cast(collator),
string1, string2);
}
// ecma402/#sec-collator-comparestrings
Handle<Object> Intl::CompareStrings(Isolate* isolate,
Handle<JSCollator> collator,
Handle<String> string1,
Handle<String> string2) {
Factory* factory = isolate->factory();
icu::Collator* icu_collator = collator->icu_collator()->raw();
CHECK_NOT_NULL(icu_collator);
string1 = String::Flatten(isolate, string1);
string2 = String::Flatten(isolate, string2);
UCollationResult result;
UErrorCode status = U_ZERO_ERROR;
{
DisallowHeapAllocation no_gc;
int32_t length1 = string1->length();
int32_t length2 = string2->length();
String::FlatContent flat1 = string1->GetFlatContent();
String::FlatContent flat2 = string2->GetFlatContent();
std::unique_ptr<uc16[]> sap1;
std::unique_ptr<uc16[]> sap2;
icu::UnicodeString string_val1(
FALSE, GetUCharBufferFromFlat(flat1, &sap1, length1), length1);
icu::UnicodeString string_val2(
FALSE, GetUCharBufferFromFlat(flat2, &sap2, length2), length2);
result = icu_collator->compare(string_val1, string_val2, status);
}
DCHECK(U_SUCCESS(status));
return factory->NewNumberFromInt(result);
}
// ecma402/#sup-properties-of-the-number-prototype-object
MaybeHandle<String> Intl::NumberToLocaleString(Isolate* isolate,
Handle<Object> num,
Handle<Object> locales,
Handle<Object> options) {
Factory* factory = isolate->factory();
Handle<JSObject> number_format_holder;
// 2. Let numberFormat be ? Construct(%NumberFormat%, « locales, options »).
ASSIGN_RETURN_ON_EXCEPTION(
isolate, number_format_holder,
CachedOrNewService(isolate,
factory->NewStringFromStaticChars("numberformat"),
locales, options),
String);
DCHECK(
Intl::IsObjectOfType(isolate, number_format_holder, Intl::kNumberFormat));
Handle<Object> number_obj;
ASSIGN_RETURN_ON_EXCEPTION(isolate, number_obj,
Object::ToNumber(isolate, num), String);
// Spec treats -0 and +0 as 0.
double number = number_obj->Number() + 0;
// Return FormatNumber(numberFormat, x).
return NumberFormat::FormatNumber(isolate, number_format_holder, number);
}
// ecma402/#sec-defaultnumberoption
Maybe<int> Intl::DefaultNumberOption(Isolate* isolate, Handle<Object> value,
int min, int max, int fallback,
Handle<String> property) {
// 2. Else, return fallback.
if (value->IsUndefined()) return Just(fallback);
// 1. If value is not undefined, then
// a. Let value be ? ToNumber(value).
Handle<Object> value_num;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, value_num, Object::ToNumber(isolate, value), Nothing<int>());
DCHECK(value_num->IsNumber());
// b. If value is NaN or less than minimum or greater than maximum, throw a
// RangeError exception.
if (value_num->IsNaN() || value_num->Number() < min ||
value_num->Number() > max) {
THROW_NEW_ERROR_RETURN_VALUE(
isolate,
NewRangeError(MessageTemplate::kPropertyValueOutOfRange, property),
Nothing<int>());
}
// The max and min arguments are integers and the above check makes
// sure that we are within the integer range making this double to
// int conversion safe.
//
// c. Return floor(value).
return Just(FastD2I(floor(value_num->Number())));
}
// ecma402/#sec-getnumberoption
Maybe<int> Intl::GetNumberOption(Isolate* isolate, Handle<JSReceiver> options,
Handle<String> property, int min, int max,
int fallback) {
// 1. Let value be ? Get(options, property).
Handle<Object> value;
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, value, JSReceiver::GetProperty(isolate, options, property),
Nothing<int>());
// Return ? DefaultNumberOption(value, minimum, maximum, fallback).
return DefaultNumberOption(isolate, value, min, max, fallback, property);
}
Maybe<int> Intl::GetNumberOption(Isolate* isolate, Handle<JSReceiver> options,
const char* property, int min, int max,
int fallback) {
Handle<String> property_str =
isolate->factory()->NewStringFromAsciiChecked(property);
return GetNumberOption(isolate, options, property_str, min, max, fallback);
}
Maybe<bool> Intl::SetNumberFormatDigitOptions(Isolate* isolate,
icu::DecimalFormat* number_format,
Handle<JSReceiver> options,
int mnfd_default,
int mxfd_default) {
CHECK_NOT_NULL(number_format);
// 5. Let mnid be ? GetNumberOption(options, "minimumIntegerDigits,", 1, 21,
// 1).
int mnid;
if (!GetNumberOption(isolate, options, "minimumIntegerDigits", 1, 21, 1)
.To(&mnid)) {
return Nothing<bool>();
}
// 6. Let mnfd be ? GetNumberOption(options, "minimumFractionDigits", 0, 20,
// mnfdDefault).
int mnfd;
if (!GetNumberOption(isolate, options, "minimumFractionDigits", 0, 20,
mnfd_default)
.To(&mnfd)) {
return Nothing<bool>();
}
// 7. Let mxfdActualDefault be max( mnfd, mxfdDefault ).
int mxfd_actual_default = std::max(mnfd, mxfd_default);
// 8. Let mxfd be ? GetNumberOption(options,
// "maximumFractionDigits", mnfd, 20, mxfdActualDefault).
int mxfd;
if (!GetNumberOption(isolate, options, "maximumFractionDigits", mnfd, 20,
mxfd_actual_default)
.To(&mxfd)) {
return Nothing<bool>();
}
// 9. Let mnsd be ? Get(options, "minimumSignificantDigits").
Handle<Object> mnsd_obj;
Handle<String> mnsd_str =
isolate->factory()->NewStringFromStaticChars("minimumSignificantDigits");
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, mnsd_obj, JSReceiver::GetProperty(isolate, options, mnsd_str),
Nothing<bool>());
// 10. Let mxsd be ? Get(options, "maximumSignificantDigits").
Handle<Object> mxsd_obj;
Handle<String> mxsd_str =
isolate->factory()->NewStringFromStaticChars("maximumSignificantDigits");
ASSIGN_RETURN_ON_EXCEPTION_VALUE(
isolate, mxsd_obj, JSReceiver::GetProperty(isolate, options, mxsd_str),
Nothing<bool>());
// 11. Set intlObj.[[MinimumIntegerDigits]] to mnid.
number_format->setMinimumIntegerDigits(mnid);
// 12. Set intlObj.[[MinimumFractionDigits]] to mnfd.
number_format->setMinimumFractionDigits(mnfd);
// 13. Set intlObj.[[MaximumFractionDigits]] to mxfd.
number_format->setMaximumFractionDigits(mxfd);
bool significant_digits_used = false;
// 14. If mnsd is not undefined or mxsd is not undefined, then
if (!mnsd_obj->IsUndefined(isolate) || !mxsd_obj->IsUndefined(isolate)) {
// 14. a. Let mnsd be ? DefaultNumberOption(mnsd, 1, 21, 1).
int mnsd;
if (!DefaultNumberOption(isolate, mnsd_obj, 1, 21, 1, mnsd_str).To(&mnsd)) {
return Nothing<bool>();
}
// 14. b. Let mxsd be ? DefaultNumberOption(mxsd, mnsd, 21, 21).
int mxsd;
if (!DefaultNumberOption(isolate, mxsd_obj, mnsd, 21, 21, mxsd_str)
.To(&mxsd)) {
return Nothing<bool>();
}
significant_digits_used = true;
// 14. c. Set intlObj.[[MinimumSignificantDigits]] to mnsd.
number_format->setMinimumSignificantDigits(mnsd);
// 14. d. Set intlObj.[[MaximumSignificantDigits]] to mxsd.
number_format->setMaximumSignificantDigits(mxsd);
}
number_format->setSignificantDigitsUsed(significant_digits_used);
number_format->setRoundingMode(icu::DecimalFormat::kRoundHalfUp);
return Just(true);
}
namespace {
// ECMA 402 9.2.2 BestAvailableLocale(availableLocales, locale)
// https://tc39.github.io/ecma402/#sec-bestavailablelocale
std::string BestAvailableLocale(std::set<std::string> available_locales,
std::string locale) {
const char separator = '-';
// 1. Let candidate be locale.
// 2. Repeat,
do {
// 2.a. If availableLocales contains an element equal to candidate, return
// candidate.
if (available_locales.find(locale) != available_locales.end()) {
return locale;
}
// 2.b. Let pos be the character index of the last occurrence of "-"
// (U+002D) within candidate. If that character does not occur, return
// undefined.
size_t pos = locale.rfind(separator);
if (pos == std::string::npos) {
return "";
}
// 2.c. If pos ≥ 2 and the character "-" occurs at index pos-2 of candidate,
// decrease pos by 2.
if (pos >= 2 && locale[pos - 2] == separator) {
pos -= 2;
}
// 2.d. Let candidate be the substring of candidate from position 0,
// inclusive, to position pos, exclusive.
locale = locale.substr(0, pos);
} while (true);
}
#define ANY_EXTENSION_REGEXP "-[a-z0-9]{1}-.*"
std::unique_ptr<icu::RegexMatcher> GetAnyExtensionRegexpMatcher() {
UErrorCode status = U_ZERO_ERROR;
std::unique_ptr<icu::RegexMatcher> matcher(new icu::RegexMatcher(
icu::UnicodeString(ANY_EXTENSION_REGEXP, -1, US_INV), 0, status));
DCHECK(U_SUCCESS(status));
return matcher;
}
#undef ANY_EXTENSION_REGEXP
// ECMA 402 9.2.7 LookupSupportedLocales(availableLocales, requestedLocales)
// https://tc39.github.io/ecma402/#sec-lookupsupportedlocales
std::vector<std::string> LookupSupportedLocales(
std::set<std::string> available_locales,
std::vector<std::string> requested_locales) {
std::unique_ptr<icu::RegexMatcher> matcher = GetAnyExtensionRegexpMatcher();
// 1. Let subset be a new empty List.
std::vector<std::string> subset;
// 2. For each element locale of requestedLocales in List order, do
for (auto locale : requested_locales) {
// 2.a. Let noExtensionsLocale be the String value that is locale with all
// Unicode locale extension sequences removed.
icu::UnicodeString locale_uni(locale.c_str(), -1, US_INV);
// TODO(bstell): look at using uloc_forLanguageTag to convert the language
// tag to locale id
// TODO(bstell): look at using uloc_getBaseName to just get the name without
// all the keywords
matcher->reset(locale_uni);
UErrorCode status = U_ZERO_ERROR;
// TODO(bstell): need to determine if this is the correct behavior.
// This matches the JS implementation but might not match the spec.
// According to
// https://tc39.github.io/ecma402/#sec-unicode-locale-extension-sequences:
//
// This standard uses the term "Unicode locale extension sequence" for
// any substring of a language tag that is not part of a private use
// subtag sequence, starts with a separator "-" and the singleton "u",
// and includes the maximum sequence of following non-singleton subtags
// and their preceding "-" separators.
//
// According to the spec a locale "en-t-aaa-u-bbb-v-ccc-x-u-ddd", should
// remove only the "-u-bbb" part, and keep everything else, whereas this
// regexp matcher would leave only the "en".
icu::UnicodeString no_extensions_locale_uni =
matcher->replaceAll("", status);
DCHECK(U_SUCCESS(status));
std::string no_extensions_locale;
no_extensions_locale_uni.toUTF8String(no_extensions_locale);
// 2.b. Let availableLocale be BestAvailableLocale(availableLocales,
// noExtensionsLocale).
std::string available_locale =
BestAvailableLocale(available_locales, no_extensions_locale);
// 2.c. If availableLocale is not undefined, append locale to the end of
// subset.
if (!available_locale.empty()) {
subset.push_back(locale);
}
}
// 3. Return subset.
return subset;
}
// ECMA 402 9.2.8 BestFitSupportedLocales(availableLocales, requestedLocales)
// https://tc39.github.io/ecma402/#sec-bestfitsupportedlocales
std::vector<std::string> BestFitSupportedLocales(
std::set<std::string> available_locales,
std::vector<std::string> requested_locales) {
return LookupSupportedLocales(available_locales, requested_locales);
}
enum MatcherOption { kBestFit, kLookup };
// TODO(bstell): should this be moved somewhere where it is reusable?
// Implement steps 5, 6, 7 for ECMA 402 9.2.9 SupportedLocales
// https://tc39.github.io/ecma402/#sec-supportedlocales
MaybeHandle<JSObject> CreateReadOnlyArray(Isolate* isolate,
std::vector<std::string> elements) {
Factory* factory = isolate->factory();
if (elements.size() >= kMaxUInt32) {
THROW_NEW_ERROR(
isolate, NewRangeError(MessageTemplate::kInvalidArrayLength), JSObject);
}
PropertyAttributes attr =
static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
// 5. Let subset be CreateArrayFromList(elements).
// 6. Let keys be subset.[[OwnPropertyKeys]]().
Handle<JSArray> subset = factory->NewJSArray(0);
// 7. For each element P of keys in List order, do
uint32_t length = static_cast<uint32_t>(elements.size());
for (uint32_t i = 0; i < length; i++) {
const std::string& part = elements[i];
Handle<String> value =
factory->NewStringFromUtf8(CStrVector(part.c_str())).ToHandleChecked();
JSObject::AddDataElement(subset, i, value, attr);
}
// 7.a. Let desc be PropertyDescriptor { [[Configurable]]: false,
// [[Writable]]: false }.
PropertyDescriptor desc;
desc.set_writable(false);
desc.set_configurable(false);
// 7.b. Perform ! DefinePropertyOrThrow(subset, P, desc).
JSArray::ArraySetLength(isolate, subset, &desc, kThrowOnError).ToChecked();
return subset;
}
// ECMA 402 9.2.9 SupportedLocales(availableLocales, requestedLocales, options)
// https://tc39.github.io/ecma402/#sec-supportedlocales
MaybeHandle<JSObject> SupportedLocales(
Isolate* isolate, std::string service,
std::set<std::string> available_locales,
std::vector<std::string> requested_locales, Handle<Object> options) {
std::vector<std::string> supported_locales;
// 1. If options is not undefined, then
// a. Let options be ? ToObject(options).
// b. Let matcher be ? GetOption(options, "localeMatcher", "string",
// « "lookup", "best fit" », "best fit").
// 2. Else, let matcher be "best fit".
MatcherOption matcher = kBestFit;
if (!options->IsUndefined(isolate)) {
Handle<JSReceiver> options_obj;
ASSIGN_RETURN_ON_EXCEPTION(isolate, options_obj,
Object::ToObject(isolate, options), JSObject);
std::unique_ptr<char[]> matcher_str = nullptr;
std::vector<const char*> matcher_values = {"lookup", "best fit"};
Maybe<bool> maybe_found_matcher =
Intl::GetStringOption(isolate, options_obj, "localeMatcher",
matcher_values, service.c_str(), &matcher_str);
MAYBE_RETURN(maybe_found_matcher, MaybeHandle<JSObject>());
if (maybe_found_matcher.FromJust()) {
DCHECK_NOT_NULL(matcher_str.get());
if (strcmp(matcher_str.get(), "lookup") == 0) {
matcher = kLookup;
}
}
}
// 3. If matcher is "best fit", then
// a. Let supportedLocales be BestFitSupportedLocales(availableLocales,
// requestedLocales).
if (matcher == kBestFit) {
supported_locales =
BestFitSupportedLocales(available_locales, requested_locales);
} else {
// 4. Else,
// a. Let supportedLocales be LookupSupportedLocales(availableLocales,
// requestedLocales).
DCHECK_EQ(matcher, kLookup);
supported_locales =
LookupSupportedLocales(available_locales, requested_locales);
}
// TODO(jkummerow): Possibly revisit why the spec has the individual entries
// readonly but the array is not frozen.
// https://github.com/tc39/ecma402/issues/258
// 5. Let subset be CreateArrayFromList(supportedLocales).
// 6. Let keys be subset.[[OwnPropertyKeys]]().
// 7. For each element P of keys in List order, do
// a. Let desc be PropertyDescriptor { [[Configurable]]: false,
// [[Writable]]: false }.
// b. Perform ! DefinePropertyOrThrow(subset, P, desc).
MaybeHandle<JSObject> subset =
CreateReadOnlyArray(isolate, supported_locales);
// 8. Return subset.
return subset;
}
} // namespace
// ECMA 402 10.2.2 Intl.Collator.supportedLocalesOf
// https://tc39.github.io/ecma402/#sec-intl.collator.supportedlocalesof
// of Intl::SupportedLocalesOf thru JS
MaybeHandle<JSObject> Intl::SupportedLocalesOf(Isolate* isolate,
Handle<String> service,
Handle<Object> locales_in,
Handle<Object> options_in) {
// Let availableLocales be %Collator%.[[AvailableLocales]].
IcuService icu_service = Intl::StringToIcuService(service);
std::set<std::string> available_locales = GetAvailableLocales(icu_service);
std::vector<std::string> requested_locales;
// Let requestedLocales be ? CanonicalizeLocaleList(locales).
bool got_requested_locales =
CanonicalizeLocaleList(isolate, locales_in, false).To(&requested_locales);
if (!got_requested_locales) {
return MaybeHandle<JSObject>();
}
// Return ? SupportedLocales(availableLocales, requestedLocales, options).
std::string service_str(service->ToCString().get());
return SupportedLocales(isolate, service_str, available_locales,
requested_locales, options_in);
}
} // namespace internal
} // namespace v8