Move helper methods from i18n extension into runtime.

src/extensions/i18n/locale.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 "locale.h"
-
-#include <string.h>
-
-#include "unicode/brkiter.h"
-#include "unicode/coll.h"
-#include "unicode/datefmt.h"
-#include "unicode/numfmt.h"
-#include "unicode/uloc.h"
-#include "unicode/uversion.h"
-
-namespace v8_i18n {
-
-void JSCanonicalizeLanguageTag(
-    const v8::FunctionCallbackInfo<v8::Value>& args) {
-  // Expect locale id which is a string.
-  if (args.Length() != 1 || !args[0]->IsString()) {
-    v8::ThrowException(v8::Exception::SyntaxError(
-        v8::String::New("Locale identifier, as a string, is required.")));
-    return;
-  }
-
-  UErrorCode error = U_ZERO_ERROR;
-
-  char icu_result[ULOC_FULLNAME_CAPACITY];
-  int icu_length = 0;
-
-  // Return value which denotes invalid language tag.
-  const char* const kInvalidTag = "invalid-tag";
-
-  v8::String::AsciiValue locale_id(args[0]->ToString());
-  if (*locale_id == NULL) {
-    args.GetReturnValue().Set(v8::String::New(kInvalidTag));
-    return;
-  }
-
-  uloc_forLanguageTag(*locale_id, icu_result, ULOC_FULLNAME_CAPACITY,
-                      &icu_length, &error);
-  if (U_FAILURE(error) || icu_length == 0) {
-    args.GetReturnValue().Set(v8::String::New(kInvalidTag));
-    return;
-  }
-
-  char result[ULOC_FULLNAME_CAPACITY];
-
-  // Force strict BCP47 rules.
-  uloc_toLanguageTag(icu_result, result, ULOC_FULLNAME_CAPACITY, TRUE, &error);
-
-  if (U_FAILURE(error)) {
-    args.GetReturnValue().Set(v8::String::New(kInvalidTag));
-    return;
-  }
-
-  args.GetReturnValue().Set(v8::String::New(result));
-}
-
-
-void JSAvailableLocalesOf(const v8::FunctionCallbackInfo<v8::Value>& args) {
-  // Expect service name which is a string.
-  if (args.Length() != 1 || !args[0]->IsString()) {
-    v8::ThrowException(v8::Exception::SyntaxError(
-        v8::String::New("Service identifier, as a string, is required.")));
-    return;
-  }
-
-  const icu::Locale* available_locales = NULL;
-
-  int32_t count = 0;
-  v8::String::AsciiValue service(args[0]->ToString());
-  if (strcmp(*service, "collator") == 0) {
-    available_locales = icu::Collator::getAvailableLocales(count);
-  } else if (strcmp(*service, "numberformat") == 0) {
-    available_locales = icu::NumberFormat::getAvailableLocales(count);
-  } else if (strcmp(*service, "dateformat") == 0) {
-    available_locales = icu::DateFormat::getAvailableLocales(count);
-  } else if (strcmp(*service, "breakiterator") == 0) {
-    available_locales = icu::BreakIterator::getAvailableLocales(count);
-  }
-
-  v8::TryCatch try_catch;
-  UErrorCode error = U_ZERO_ERROR;
-  char result[ULOC_FULLNAME_CAPACITY];
-  v8::Handle<v8::Object> locales = v8::Object::New();
-
-  for (int32_t i = 0; i < count; ++i) {
-    const char* icu_name = 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)) {
-      // This shouldn't happen, but lets not break the user.
-      continue;
-    }
-
-    // Index is just a dummy value for the property value.
-    locales->Set(v8::String::New(result), v8::Integer::New(i));
-    if (try_catch.HasCaught()) {
-      // Ignore error, but stop processing and return.
-      break;
-    }
-  }
-
-  args.GetReturnValue().Set(locales);
-}
-
-
-void JSGetDefaultICULocale(const v8::FunctionCallbackInfo<v8::Value>& args) {
-  icu::Locale default_locale;
-
-  // Set the locale
-  char result[ULOC_FULLNAME_CAPACITY];
-  UErrorCode status = U_ZERO_ERROR;
-  uloc_toLanguageTag(
-      default_locale.getName(), result, ULOC_FULLNAME_CAPACITY, FALSE, &status);
-  if (U_SUCCESS(status)) {
-    args.GetReturnValue().Set(v8::String::New(result));
-    return;
-  }
-
-  args.GetReturnValue().Set(v8::String::New("und"));
-}
-
-
-void JSGetLanguageTagVariants(const v8::FunctionCallbackInfo<v8::Value>& args) {
-  v8::TryCatch try_catch;
-
-  // Expect an array of strings.
-  if (args.Length() != 1 || !args[0]->IsArray()) {
-    v8::ThrowException(v8::Exception::SyntaxError(
-        v8::String::New("Internal error. Expected Array<String>.")));
-    return;
-  }
-
-  v8::Local<v8::Array> input = v8::Local<v8::Array>::Cast(args[0]);
-  v8::Handle<v8::Array> output = v8::Array::New(input->Length());
-  for (unsigned int i = 0; i < input->Length(); ++i) {
-    v8::Local<v8::Value> locale_id = input->Get(i);
-    if (try_catch.HasCaught()) {
-      break;
-    }
-
-    if (!locale_id->IsString()) {
-      v8::ThrowException(v8::Exception::SyntaxError(
-          v8::String::New("Internal error. Array element is missing "
-                          "or it isn't a string.")));
-      return;
-    }
-
-    v8::String::AsciiValue ascii_locale_id(locale_id);
-    if (*ascii_locale_id == NULL) {
-      v8::ThrowException(v8::Exception::SyntaxError(
-          v8::String::New("Internal error. Non-ASCII locale identifier.")));
-      return;
-    }
-
-    UErrorCode error = U_ZERO_ERROR;
-
-    // Convert from BCP47 to ICU format.
-    // de-DE-u-co-phonebk -> de_DE@collation=phonebook
-    char icu_locale[ULOC_FULLNAME_CAPACITY];
-    int icu_locale_length = 0;
-    uloc_forLanguageTag(*ascii_locale_id, icu_locale, ULOC_FULLNAME_CAPACITY,
-                        &icu_locale_length, &error);
-    if (U_FAILURE(error) || icu_locale_length == 0) {
-      v8::ThrowException(v8::Exception::SyntaxError(
-          v8::String::New("Internal error. Failed to convert locale to ICU.")));
-      return;
-    }
-
-    // Maximize the locale.
-    // de_DE@collation=phonebook -> de_Latn_DE@collation=phonebook
-    char icu_max_locale[ULOC_FULLNAME_CAPACITY];
-    uloc_addLikelySubtags(
-        icu_locale, icu_max_locale, ULOC_FULLNAME_CAPACITY, &error);
-
-    // Remove extensions from maximized locale.
-    // de_Latn_DE@collation=phonebook -> de_Latn_DE
-    char icu_base_max_locale[ULOC_FULLNAME_CAPACITY];
-    uloc_getBaseName(
-        icu_max_locale, icu_base_max_locale, ULOC_FULLNAME_CAPACITY, &error);
-
-    // Get original name without extensions.
-    // de_DE@collation=phonebook -> de_DE
-    char icu_base_locale[ULOC_FULLNAME_CAPACITY];
-    uloc_getBaseName(
-        icu_locale, icu_base_locale, ULOC_FULLNAME_CAPACITY, &error);
-
-    // Convert from ICU locale format to BCP47 format.
-    // de_Latn_DE -> de-Latn-DE
-    char base_max_locale[ULOC_FULLNAME_CAPACITY];
-    uloc_toLanguageTag(icu_base_max_locale, base_max_locale,
-                       ULOC_FULLNAME_CAPACITY, FALSE, &error);
-
-    // de_DE -> de-DE
-    char base_locale[ULOC_FULLNAME_CAPACITY];
-    uloc_toLanguageTag(
-        icu_base_locale, base_locale, ULOC_FULLNAME_CAPACITY, FALSE, &error);
-
-    if (U_FAILURE(error)) {
-      v8::ThrowException(v8::Exception::SyntaxError(
-          v8::String::New("Internal error. Couldn't generate maximized "
-                          "or base locale.")));
-      return;
-    }
-
-    v8::Handle<v8::Object> result = v8::Object::New();
-    result->Set(v8::String::New("maximized"), v8::String::New(base_max_locale));
-    result->Set(v8::String::New("base"), v8::String::New(base_locale));
-    if (try_catch.HasCaught()) {
-      break;
-    }
-
-    output->Set(i, result);
-    if (try_catch.HasCaught()) {
-      break;
-    }
-  }
-
-  args.GetReturnValue().Set(output);
-}
-
-}  // namespace v8_i18n