Version 3.20.15

src/i18n.cc

-// Copyright 2013 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-// limitations under the License.
-
-#include "i18n.h"
-
-#include "unicode/calendar.h"
-#include "unicode/dtfmtsym.h"
-#include "unicode/dtptngen.h"
-#include "unicode/locid.h"
-#include "unicode/numsys.h"
-#include "unicode/smpdtfmt.h"
-#include "unicode/timezone.h"
-
-namespace v8 {
-namespace internal {
-
-namespace {
-
-icu::SimpleDateFormat* CreateICUDateFormat(
-    Isolate* isolate,
-    const icu::Locale& icu_locale,
-    Handle<Object> options) {
-  // Create time zone as specified by the user. We have to re-create time zone
-  // since calendar takes ownership.
-  icu::TimeZone* tz = NULL;
-  MaybeObject* maybe_object = options->GetProperty(
-      *isolate->factory()->NewStringFromAscii(CStrVector("timeZone")));
-  Object* timezone;
-  if (maybe_object->ToObject(&timezone) && timezone->IsString()) {
-    v8::String::Utf8Value utf8_timezone(
-        v8::Utils::ToLocal(Handle<String>(String::cast(timezone))));
-    icu::UnicodeString u_timezone(icu::UnicodeString::fromUTF8(*utf8_timezone));
-    tz = icu::TimeZone::createTimeZone(u_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);
-
-  // 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 = NULL;
-  Object* skeleton;
-  maybe_object = options->GetProperty(
-      *isolate->factory()->NewStringFromAscii(CStrVector("skeleton")));
-  if (maybe_object->ToObject(&skeleton) && skeleton->IsString()) {
-    v8::String::Utf8Value utf8_skeleton(
-        v8::Utils::ToLocal(Handle<String>(String::cast(skeleton))));
-    icu::UnicodeString u_skeleton(icu::UnicodeString::fromUTF8(*utf8_skeleton));
-    icu::DateTimePatternGenerator* generator =
-        icu::DateTimePatternGenerator::createInstance(icu_locale, status);
-    icu::UnicodeString pattern;
-    if (U_SUCCESS(status)) {
-      pattern = generator->getBestPattern(u_skeleton, status);
-      delete generator;
-    }
-
-    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 = NULL;
-  }
-
-  return date_format;
-}
-
-
-void SetResolvedSettings(Isolate* isolate,
-                         const icu::Locale& icu_locale,
-                         icu::SimpleDateFormat* date_format,
-                         Handle<JSObject> resolved) {
-  UErrorCode status = U_ZERO_ERROR;
-  icu::UnicodeString pattern;
-  date_format->toPattern(pattern);
-  JSObject::SetProperty(
-      resolved,
-      isolate->factory()->NewStringFromAscii(CStrVector("pattern")),
-      isolate->factory()->NewStringFromTwoByte(
-        Vector<const uint16_t>(
-            reinterpret_cast<const uint16_t*>(pattern.getBuffer()),
-            pattern.length())),
-      NONE,
-      kNonStrictMode);
-
-  // Set time zone and calendar.
-  const icu::Calendar* calendar = date_format->getCalendar();
-  const char* calendar_name = calendar->getType();
-  JSObject::SetProperty(
-      resolved,
-      isolate->factory()->NewStringFromAscii(CStrVector("calendar")),
-      isolate->factory()->NewStringFromAscii(CStrVector(calendar_name)),
-      NONE,
-      kNonStrictMode);
-
-  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)) {
-    if (canonical_time_zone == UNICODE_STRING_SIMPLE("Etc/GMT")) {
-      JSObject::SetProperty(
-          resolved,
-          isolate->factory()->NewStringFromAscii(CStrVector("timeZone")),
-          isolate->factory()->NewStringFromAscii(CStrVector("UTC")),
-          NONE,
-          kNonStrictMode);
-    } else {
-      JSObject::SetProperty(
-          resolved,
-          isolate->factory()->NewStringFromAscii(CStrVector("timeZone")),
-          isolate->factory()->NewStringFromTwoByte(
-            Vector<const uint16_t>(
-                reinterpret_cast<const uint16_t*>(
-                    canonical_time_zone.getBuffer()),
-                canonical_time_zone.length())),
-          NONE,
-          kNonStrictMode);
-    }
-  }
-
-  // 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(
-        resolved,
-        isolate->factory()->NewStringFromAscii(CStrVector("numberingSystem")),
-        isolate->factory()->NewStringFromAscii(CStrVector(ns)),
-        NONE,
-        kNonStrictMode);
-  } else {
-    JSObject::SetProperty(
-        resolved,
-        isolate->factory()->NewStringFromAscii(CStrVector("numberingSystem")),
-        isolate->factory()->undefined_value(),
-        NONE,
-        kNonStrictMode);
-  }
-  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(
-        resolved,
-        isolate->factory()->NewStringFromAscii(CStrVector("locale")),
-        isolate->factory()->NewStringFromAscii(CStrVector(result)),
-        NONE,
-        kNonStrictMode);
-  } else {
-    // This would never happen, since we got the locale from ICU.
-    JSObject::SetProperty(
-        resolved,
-        isolate->factory()->NewStringFromAscii(CStrVector("locale")),
-        isolate->factory()->NewStringFromAscii(CStrVector("und")),
-        NONE,
-        kNonStrictMode);
-  }
-}
-
-
-template<int internal_fields, EternalHandles::SingletonHandle field>
-Handle<ObjectTemplateInfo> GetEternal(Isolate* isolate) {
-  if (isolate->eternal_handles()->Exists(field)) {
-    return Handle<ObjectTemplateInfo>::cast(
-        isolate->eternal_handles()->GetSingleton(field));
-  }
-  v8::Local<v8::ObjectTemplate> raw_template(v8::ObjectTemplate::New());
-  raw_template->SetInternalFieldCount(internal_fields);
-  return Handle<ObjectTemplateInfo>::cast(
-      isolate->eternal_handles()->CreateSingleton(
-        isolate,
-        *v8::Utils::OpenHandle(*raw_template),
-        field));
-}
-
-}  // namespace
-
-
-// static
-Handle<ObjectTemplateInfo> I18N::GetTemplate(Isolate* isolate) {
-  return GetEternal<1, i::EternalHandles::I18N_TEMPLATE_ONE>(isolate);
-}
-
-
-// static
-Handle<ObjectTemplateInfo> I18N::GetTemplate2(Isolate* isolate) {
-  return GetEternal<2, i::EternalHandles::I18N_TEMPLATE_TWO>(isolate);
-}
-
-
-// static
-icu::SimpleDateFormat* DateFormat::InitializeDateTimeFormat(
-    Isolate* isolate,
-    Handle<String> locale,
-    Handle<JSObject> options,
-    Handle<JSObject> resolved) {
-  // Convert BCP47 into ICU locale format.
-  UErrorCode status = U_ZERO_ERROR;
-  icu::Locale icu_locale;
-  char icu_result[ULOC_FULLNAME_CAPACITY];
-  int icu_length = 0;
-  v8::String::Utf8Value bcp47_locale(v8::Utils::ToLocal(locale));
-  if (bcp47_locale.length() != 0) {
-    uloc_forLanguageTag(*bcp47_locale, icu_result, ULOC_FULLNAME_CAPACITY,
-                        &icu_length, &status);
-    if (U_FAILURE(status) || icu_length == 0) {
-      return NULL;
-    }
-    icu_locale = icu::Locale(icu_result);
-  }
-
-  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);
-
-    // Set resolved settings (pattern, numbering system, calendar).
-    SetResolvedSettings(isolate, no_extension_locale, date_format, resolved);
-  } else {
-    SetResolvedSettings(isolate, icu_locale, date_format, resolved);
-  }
-
-  return date_format;
-}
-
-
-icu::SimpleDateFormat* DateFormat::UnpackDateFormat(
-    Isolate* isolate,
-    Handle<JSObject> obj) {
-  if (obj->HasLocalProperty(
-          *isolate->factory()->NewStringFromAscii(CStrVector("dateFormat")))) {
-    return reinterpret_cast<icu::SimpleDateFormat*>(
-        obj->GetInternalField(0));
-  }
-
-  return NULL;
-}
-
-
-void DateFormat::DeleteDateFormat(v8::Isolate* isolate,
-                                  Persistent<v8::Object>* object,
-                                  void* param) {
-  // First delete the hidden C++ object.
-  delete reinterpret_cast<icu::SimpleDateFormat*>(Handle<JSObject>::cast(
-      v8::Utils::OpenPersistent(object))->GetInternalField(0));
-
-  // Then dispose of the persistent handle to JS object.
-  object->Dispose(isolate);
-}
-
-} }  // namespace v8::internal