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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-collator.h"
#include "src/execution/isolate.h"
#include "src/objects/js-collator-inl.h"
#include "src/objects/objects-inl.h"
#include "unicode/coll.h"
#include "unicode/locid.h"
#include "unicode/strenum.h"
#include "unicode/ucol.h"
#include "unicode/udata.h"
#include "unicode/uloc.h"
#include "unicode/utypes.h"
namespace v8 {
namespace internal {
namespace {
enum class Usage {
SORT,
SEARCH,
};
enum class Sensitivity {
kBase,
kAccent,
kCase,
kVariant,
kUndefined,
};
// TODO(gsathya): Consider internalizing the value strings.
void CreateDataPropertyForOptions(Isolate* isolate, Handle<JSObject> options,
Handle<String> key, const char* value) {
CHECK_NOT_NULL(value);
Handle<String> value_str =
isolate->factory()->NewStringFromAsciiChecked(value);
// 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, value_str,
Just(kDontThrow))
.FromJust());
}
void CreateDataPropertyForOptions(Isolate* isolate, Handle<JSObject> options,
Handle<String> key, bool value) {
Handle<Object> value_obj = isolate->factory()->ToBoolean(value);
// 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, value_obj,
Just(kDontThrow))
.FromJust());
}
} // anonymous namespace
// static
Handle<JSObject> JSCollator::ResolvedOptions(Isolate* isolate,
Handle<JSCollator> collator) {
Handle<JSObject> options =
isolate->factory()->NewJSObject(isolate->object_function());
icu::Collator* icu_collator = collator->icu_collator().raw();
CHECK_NOT_NULL(icu_collator);
UErrorCode status = U_ZERO_ERROR;
bool numeric =
icu_collator->getAttribute(UCOL_NUMERIC_COLLATION, status) == UCOL_ON;
CHECK(U_SUCCESS(status));
const char* case_first = nullptr;
status = U_ZERO_ERROR;
switch (icu_collator->getAttribute(UCOL_CASE_FIRST, status)) {
case UCOL_LOWER_FIRST:
case_first = "lower";
break;
case UCOL_UPPER_FIRST:
case_first = "upper";
break;
default:
case_first = "false";
}
CHECK(U_SUCCESS(status));
const char* sensitivity = nullptr;
status = U_ZERO_ERROR;
switch (icu_collator->getAttribute(UCOL_STRENGTH, status)) {
case UCOL_PRIMARY: {
CHECK(U_SUCCESS(status));
status = U_ZERO_ERROR;
// case level: true + s1 -> case, s1 -> base.
if (UCOL_ON == icu_collator->getAttribute(UCOL_CASE_LEVEL, status)) {
sensitivity = "case";
} else {
sensitivity = "base";
}
CHECK(U_SUCCESS(status));
break;
}
case UCOL_SECONDARY:
sensitivity = "accent";
break;
case UCOL_TERTIARY:
sensitivity = "variant";
break;
case UCOL_QUATERNARY:
// We shouldn't get quaternary and identical from ICU, but if we do
// put them into variant.
sensitivity = "variant";
break;
default:
sensitivity = "variant";
}
CHECK(U_SUCCESS(status));
status = U_ZERO_ERROR;
bool ignore_punctuation = icu_collator->getAttribute(UCOL_ALTERNATE_HANDLING,
status) == UCOL_SHIFTED;
CHECK(U_SUCCESS(status));
status = U_ZERO_ERROR;
icu::Locale icu_locale(icu_collator->getLocale(ULOC_VALID_LOCALE, status));
CHECK(U_SUCCESS(status));
const char* collation = "default";
const char* usage = "sort";
const char* collation_key = "co";
status = U_ZERO_ERROR;
std::string collation_value =
icu_locale.getUnicodeKeywordValue<std::string>(collation_key, status);
std::string locale;
if (U_SUCCESS(status)) {
if (collation_value == "search") {
usage = "search";
// Search is disallowed as a collation value per spec. Let's
// use `default`, instead.
//
// https://tc39.github.io/ecma402/#sec-properties-of-intl-collator-instances
collation = "default";
// We clone the icu::Locale because we don't want the
// icu_collator to be affected when we remove the collation key
// below.
icu::Locale new_icu_locale = icu_locale;
// The spec forbids the search as a collation value in the
// locale tag, so let's filter it out.
status = U_ZERO_ERROR;
new_icu_locale.setUnicodeKeywordValue(collation_key, nullptr, status);
CHECK(U_SUCCESS(status));
locale = Intl::ToLanguageTag(new_icu_locale).FromJust();
} else {
collation = collation_value.c_str();
locale = Intl::ToLanguageTag(icu_locale).FromJust();
}
} else {
locale = Intl::ToLanguageTag(icu_locale).FromJust();
}
// 5. For each row of Table 2, except the header row, in table order, do
// ...
// Table 2: Resolved Options of Collator Instances
// Internal Slot Property Extension Key
// [[Locale] "locale"
// [[Usage] "usage"
// [[Sensitivity]] "sensitivity"
// [[IgnorePunctuation]] "ignorePunctuation"
// [[Collation]] "collation"
// [[Numeric]] "numeric" kn
// [[CaseFirst]] "caseFirst" kf
CreateDataPropertyForOptions(
isolate, options, isolate->factory()->locale_string(), locale.c_str());
CreateDataPropertyForOptions(isolate, options,
isolate->factory()->usage_string(), usage);
CreateDataPropertyForOptions(
isolate, options, isolate->factory()->sensitivity_string(), sensitivity);
CreateDataPropertyForOptions(isolate, options,
isolate->factory()->ignorePunctuation_string(),
ignore_punctuation);
CreateDataPropertyForOptions(
isolate, options, isolate->factory()->collation_string(), collation);
CreateDataPropertyForOptions(isolate, options,
isolate->factory()->numeric_string(), numeric);
CreateDataPropertyForOptions(
isolate, options, isolate->factory()->caseFirst_string(), case_first);
return options;
}
namespace {
Intl::CaseFirst ToCaseFirst(const char* str) {
if (strcmp(str, "upper") == 0) return Intl::CaseFirst::kUpper;
if (strcmp(str, "lower") == 0) return Intl::CaseFirst::kLower;
if (strcmp(str, "false") == 0) return Intl::CaseFirst::kFalse;
return Intl::CaseFirst::kUndefined;
}
UColAttributeValue ToUColAttributeValue(Intl::CaseFirst case_first) {
switch (case_first) {
case Intl::CaseFirst::kUpper:
return UCOL_UPPER_FIRST;
case Intl::CaseFirst::kLower:
return UCOL_LOWER_FIRST;
case Intl::CaseFirst::kFalse:
case Intl::CaseFirst::kUndefined:
return UCOL_OFF;
}
}
void SetNumericOption(icu::Collator* icu_collator, bool numeric) {
CHECK_NOT_NULL(icu_collator);
UErrorCode status = U_ZERO_ERROR;
icu_collator->setAttribute(UCOL_NUMERIC_COLLATION,
numeric ? UCOL_ON : UCOL_OFF, status);
CHECK(U_SUCCESS(status));
}
void SetCaseFirstOption(icu::Collator* icu_collator,
Intl::CaseFirst case_first) {
CHECK_NOT_NULL(icu_collator);
UErrorCode status = U_ZERO_ERROR;
icu_collator->setAttribute(UCOL_CASE_FIRST, ToUColAttributeValue(case_first),
status);
CHECK(U_SUCCESS(status));
}
} // anonymous namespace
// static
MaybeHandle<JSCollator> JSCollator::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<JSCollator>());
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.Collator"), JSCollator);
}
// At this point, options_obj can either be a JSObject or a JSProxy only.
Handle<JSReceiver> options = Handle<JSReceiver>::cast(options_obj);
// 4. Let usage be ? GetOption(options, "usage", "string", « "sort",
// "search" », "sort").
Maybe<Usage> maybe_usage = Intl::GetStringOption<Usage>(
isolate, options, "usage", "Intl.Collator", {"sort", "search"},
{Usage::SORT, Usage::SEARCH}, Usage::SORT);
MAYBE_RETURN(maybe_usage, MaybeHandle<JSCollator>());
Usage usage = maybe_usage.FromJust();
// 9. Let matcher be ? GetOption(options, "localeMatcher", "string",
// « "lookup", "best fit" », "best fit").
// 10. Set opt.[[localeMatcher]] to matcher.
Maybe<Intl::MatcherOption> maybe_locale_matcher =
Intl::GetLocaleMatcher(isolate, options, "Intl.Collator");
MAYBE_RETURN(maybe_locale_matcher, MaybeHandle<JSCollator>());
Intl::MatcherOption matcher = maybe_locale_matcher.FromJust();
// 11. Let numeric be ? GetOption(options, "numeric", "boolean",
// undefined, undefined).
// 12. If numeric is not undefined, then
// a. Let numeric be ! ToString(numeric).
//
// Note: We omit the ToString(numeric) operation as it's not
// observable. Intl::GetBoolOption returns a Boolean and
// ToString(Boolean) is not side-effecting.
//
// 13. Set opt.[[kn]] to numeric.
bool numeric;
Maybe<bool> found_numeric = Intl::GetBoolOption(isolate, options, "numeric",
"Intl.Collator", &numeric);
MAYBE_RETURN(found_numeric, MaybeHandle<JSCollator>());
// 14. Let caseFirst be ? GetOption(options, "caseFirst", "string",
// « "upper", "lower", "false" », undefined).
Maybe<Intl::CaseFirst> maybe_case_first =
Intl::GetCaseFirst(isolate, options, "Intl.Collator");
MAYBE_RETURN(maybe_case_first, MaybeHandle<JSCollator>());
Intl::CaseFirst case_first = maybe_case_first.FromJust();
// The relevant unicode extensions accepted by Collator as specified here:
// https://tc39.github.io/ecma402/#sec-intl-collator-internal-slots
//
// 16. Let relevantExtensionKeys be %Collator%.[[RelevantExtensionKeys]].
std::set<std::string> relevant_extension_keys{"co", "kn", "kf"};
// 17. Let r be ResolveLocale(%Collator%.[[AvailableLocales]],
// requestedLocales, opt, %Collator%.[[RelevantExtensionKeys]],
// localeData).
Intl::ResolvedLocale r =
Intl::ResolveLocale(isolate, JSCollator::GetAvailableLocales(),
requested_locales, matcher, relevant_extension_keys);
// 18. Set collator.[[Locale]] to r.[[locale]].
icu::Locale icu_locale = r.icu_locale;
DCHECK(!icu_locale.isBogus());
// 19. Let collation be r.[[co]].
// 5. Set collator.[[Usage]] to usage.
//
// 6. If usage is "sort", then
// a. Let localeData be %Collator%.[[SortLocaleData]].
// 7. Else,
// a. Let localeData be %Collator%.[[SearchLocaleData]].
//
// The Intl spec doesn't allow us to use "search" as an extension
// value for collation as per:
// https://tc39.github.io/ecma402/#sec-intl-collator-internal-slots
//
// But the only way to pass the value "search" for collation from
// the options object to ICU is to use the 'co' extension keyword.
//
// This will need to be filtered out when creating the
// resolvedOptions object.
if (usage == Usage::SEARCH) {
UErrorCode status = U_ZERO_ERROR;
icu_locale.setUnicodeKeywordValue("co", "search", status);
CHECK(U_SUCCESS(status));
}
// 20. If collation is null, let collation be "default".
// 21. Set collator.[[Collation]] to collation.
//
// We don't store the collation value as per the above two steps
// here. The collation value can be looked up from icu::Collator on
// demand, as part of Intl.Collator.prototype.resolvedOptions.
UErrorCode status = U_ZERO_ERROR;
std::unique_ptr<icu::Collator> icu_collator(
icu::Collator::createInstance(icu_locale, status));
if (U_FAILURE(status) || icu_collator.get() == nullptr) {
status = U_ZERO_ERROR;
// Remove extensions and try again.
icu::Locale no_extension_locale(icu_locale.getBaseName());
icu_collator.reset(
icu::Collator::createInstance(no_extension_locale, status));
if (U_FAILURE(status) || icu_collator.get() == nullptr) {
FATAL("Failed to create ICU collator, are ICU data files missing?");
}
}
DCHECK(U_SUCCESS(status));
CHECK_NOT_NULL(icu_collator.get());
// 22. If relevantExtensionKeys contains "kn", then
// a. Set collator.[[Numeric]] to ! SameValue(r.[[kn]], "true").
//
// If the numeric value is passed in through the options object,
// then we use it. Otherwise, we check if the numeric value is
// passed in through the unicode extensions.
status = U_ZERO_ERROR;
if (found_numeric.FromJust()) {
SetNumericOption(icu_collator.get(), numeric);
} else {
auto kn_extension_it = r.extensions.find("kn");
if (kn_extension_it != r.extensions.end()) {
SetNumericOption(icu_collator.get(), (kn_extension_it->second == "true"));
}
}
// 23. If relevantExtensionKeys contains "kf", then
// a. Set collator.[[CaseFirst]] to r.[[kf]].
//
// If the caseFirst value is passed in through the options object,
// then we use it. Otherwise, we check if the caseFirst value is
// passed in through the unicode extensions.
if (case_first != Intl::CaseFirst::kUndefined) {
SetCaseFirstOption(icu_collator.get(), case_first);
} else {
auto kf_extension_it = r.extensions.find("kf");
if (kf_extension_it != r.extensions.end()) {
SetCaseFirstOption(icu_collator.get(),
ToCaseFirst(kf_extension_it->second.c_str()));
}
}
// Normalization is always on, by the spec. We are free to optimize
// if the strings are already normalized (but we don't have a way to tell
// that right now).
status = U_ZERO_ERROR;
icu_collator->setAttribute(UCOL_NORMALIZATION_MODE, UCOL_ON, status);
CHECK(U_SUCCESS(status));
// 24. Let sensitivity be ? GetOption(options, "sensitivity",
// "string", « "base", "accent", "case", "variant" », undefined).
Maybe<Sensitivity> maybe_sensitivity = Intl::GetStringOption<Sensitivity>(
isolate, options, "sensitivity", "Intl.Collator",
{"base", "accent", "case", "variant"},
{Sensitivity::kBase, Sensitivity::kAccent, Sensitivity::kCase,
Sensitivity::kVariant},
Sensitivity::kUndefined);
MAYBE_RETURN(maybe_sensitivity, MaybeHandle<JSCollator>());
Sensitivity sensitivity = maybe_sensitivity.FromJust();
// 25. If sensitivity is undefined, then
if (sensitivity == Sensitivity::kUndefined) {
// 25. a. If usage is "sort", then
if (usage == Usage::SORT) {
// 25. a. i. Let sensitivity be "variant".
sensitivity = Sensitivity::kVariant;
}
}
// 26. Set collator.[[Sensitivity]] to sensitivity.
switch (sensitivity) {
case Sensitivity::kBase:
icu_collator->setStrength(icu::Collator::PRIMARY);
break;
case Sensitivity::kAccent:
icu_collator->setStrength(icu::Collator::SECONDARY);
break;
case Sensitivity::kCase:
icu_collator->setStrength(icu::Collator::PRIMARY);
status = U_ZERO_ERROR;
icu_collator->setAttribute(UCOL_CASE_LEVEL, UCOL_ON, status);
CHECK(U_SUCCESS(status));
break;
case Sensitivity::kVariant:
icu_collator->setStrength(icu::Collator::TERTIARY);
break;
case Sensitivity::kUndefined:
break;
}
// 27.Let ignorePunctuation be ? GetOption(options,
// "ignorePunctuation", "boolean", undefined, false).
bool ignore_punctuation;
Maybe<bool> found_ignore_punctuation =
Intl::GetBoolOption(isolate, options, "ignorePunctuation",
"Intl.Collator", &ignore_punctuation);
MAYBE_RETURN(found_ignore_punctuation, MaybeHandle<JSCollator>());
// 28. Set collator.[[IgnorePunctuation]] to ignorePunctuation.
if (found_ignore_punctuation.FromJust() && ignore_punctuation) {
status = U_ZERO_ERROR;
icu_collator->setAttribute(UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED, status);
CHECK(U_SUCCESS(status));
}
Handle<Managed<icu::Collator>> managed_collator =
Managed<icu::Collator>::FromUniquePtr(isolate, 0,
std::move(icu_collator));
// Now all properties are ready, so we can allocate the result object.
Handle<JSCollator> collator = Handle<JSCollator>::cast(
isolate->factory()->NewFastOrSlowJSObjectFromMap(map));
DisallowHeapAllocation no_gc;
collator->set_icu_collator(*managed_collator);
// 29. Return collator.
return collator;
}
namespace {
struct CheckColl {
static const char* key() { return nullptr; }
#define U_ICUDATA_COLL U_ICUDATA_NAME U_TREE_SEPARATOR_STRING "coll"
static const char* path() { return U_ICUDATA_COLL; }
#undef U_ICUDATA_COLL
};
} // namespace
const std::set<std::string>& JSCollator::GetAvailableLocales() {
static base::LazyInstance<Intl::AvailableLocales<icu::Collator, CheckColl>>::
type available_locales = LAZY_INSTANCE_INITIALIZER;
return available_locales.Pointer()->Get();
}
} // namespace internal
} // namespace v8