Move i18n extension's date-format C++ code to runtime

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