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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/locale_utils.h"
#include "base/android/jni_android.h"
#include "base/android/jni_string.h"
#include "base/android/scoped_java_ref.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "jni/LocaleUtils_jni.h"
#include "third_party/icu/public/common/unicode/uloc.h"
namespace base {
namespace android {
std::string GetDefaultLocale() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jstring> locale = Java_LocaleUtils_getDefaultLocale(env);
return ConvertJavaStringToUTF8(locale);
}
namespace {
// Common prototype of ICU uloc_getXXX() functions.
typedef int32_t (*UlocGetComponentFunc)(const char*, char*, int32_t,
UErrorCode*);
std::string GetLocaleComponent(const std::string& locale,
UlocGetComponentFunc uloc_func,
int32_t max_capacity) {
std::string result;
UErrorCode error = U_ZERO_ERROR;
int32_t actual_length = uloc_func(locale.c_str(),
WriteInto(&result, max_capacity),
max_capacity,
&error);
DCHECK(U_SUCCESS(error));
DCHECK(actual_length < max_capacity);
result.resize(actual_length);
return result;
}
ScopedJavaLocalRef<jobject> NewJavaLocale(
JNIEnv* env,
const std::string& locale) {
// TODO(wangxianzhu): Use new Locale API once Android supports scripts.
std::string language = GetLocaleComponent(
locale, uloc_getLanguage, ULOC_LANG_CAPACITY);
std::string country = GetLocaleComponent(
locale, uloc_getCountry, ULOC_COUNTRY_CAPACITY);
std::string variant = GetLocaleComponent(
locale, uloc_getVariant, ULOC_FULLNAME_CAPACITY);
return Java_LocaleUtils_getJavaLocale(env,
ConvertUTF8ToJavaString(env, language).obj(),
ConvertUTF8ToJavaString(env, country).obj(),
ConvertUTF8ToJavaString(env, variant).obj());
}
} // namespace
string16 GetDisplayNameForLocale(const std::string& locale,
const std::string& display_locale) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> java_locale =
NewJavaLocale(env, locale);
ScopedJavaLocalRef<jobject> java_display_locale =
NewJavaLocale(env, display_locale);
ScopedJavaLocalRef<jstring> java_result(
Java_LocaleUtils_getDisplayNameForLocale(env,
java_locale.obj(),
java_display_locale.obj()));
return ConvertJavaStringToUTF16(java_result);
}
bool RegisterLocaleUtils(JNIEnv* env) {
return RegisterNativesImpl(env);
}
} // namespace android
} // namespace base
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