1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ui/base/l10n/l10n_util_android.h"
6
7 #include "base/android/jni_android.h"
8 #include "base/android/jni_string.h"
9 #include "base/android/scoped_java_ref.h"
10 #include "base/i18n/rtl.h"
11 #include "base/logging.h"
12 #include "base/strings/string_util.h"
13 #include "base/time/time.h"
14 #include "jni/LocalizationUtils_jni.h"
15 #include "third_party/icu/source/common/unicode/uloc.h"
16 #include "ui/base/l10n/time_format.h"
17
18 namespace l10n_util {
19
GetFirstStrongCharacterDirection(JNIEnv * env,jclass clazz,jstring string)20 jint GetFirstStrongCharacterDirection(JNIEnv* env, jclass clazz,
21 jstring string) {
22 return base::i18n::GetFirstStrongCharacterDirection(
23 base::android::ConvertJavaStringToUTF16(env, string));
24 }
25
GetDefaultLocale()26 std::string GetDefaultLocale() {
27 JNIEnv* env = base::android::AttachCurrentThread();
28 ScopedJavaLocalRef<jstring> locale = Java_LocalizationUtils_getDefaultLocale(
29 env);
30 return ConvertJavaStringToUTF8(locale);
31 }
32
IsLayoutRtl()33 bool IsLayoutRtl() {
34 static bool is_layout_rtl_cached = false;
35 static bool layout_rtl_cache;
36
37 if (!is_layout_rtl_cached) {
38 is_layout_rtl_cached = true;
39 JNIEnv* env = base::android::AttachCurrentThread();
40 layout_rtl_cache =
41 static_cast<bool>(Java_LocalizationUtils_isLayoutRtl(env));
42 }
43
44 return layout_rtl_cache;
45 }
46
47 namespace {
48
49 // Common prototype of ICU uloc_getXXX() functions.
50 typedef int32_t (*UlocGetComponentFunc)(const char*, char*, int32_t,
51 UErrorCode*);
52
GetLocaleComponent(const std::string & locale,UlocGetComponentFunc uloc_func,int32_t max_capacity)53 std::string GetLocaleComponent(const std::string& locale,
54 UlocGetComponentFunc uloc_func,
55 int32_t max_capacity) {
56 std::string result;
57 UErrorCode error = U_ZERO_ERROR;
58 int32_t actual_length = uloc_func(locale.c_str(),
59 WriteInto(&result, max_capacity),
60 max_capacity,
61 &error);
62 DCHECK(U_SUCCESS(error));
63 DCHECK(actual_length < max_capacity);
64 result.resize(actual_length);
65 return result;
66 }
67
NewJavaLocale(JNIEnv * env,const std::string & locale)68 ScopedJavaLocalRef<jobject> NewJavaLocale(
69 JNIEnv* env,
70 const std::string& locale) {
71 // TODO(wangxianzhu): Use new Locale API once Android supports scripts.
72 std::string language = GetLocaleComponent(
73 locale, uloc_getLanguage, ULOC_LANG_CAPACITY);
74 std::string country = GetLocaleComponent(
75 locale, uloc_getCountry, ULOC_COUNTRY_CAPACITY);
76 std::string variant = GetLocaleComponent(
77 locale, uloc_getVariant, ULOC_FULLNAME_CAPACITY);
78 return Java_LocalizationUtils_getJavaLocale(env,
79 base::android::ConvertUTF8ToJavaString(env, language).obj(),
80 base::android::ConvertUTF8ToJavaString(env, country).obj(),
81 base::android::ConvertUTF8ToJavaString(env, variant).obj());
82 }
83
84 } // namespace
85
GetDisplayNameForLocale(const std::string & locale,const std::string & display_locale)86 base::string16 GetDisplayNameForLocale(const std::string& locale,
87 const std::string& display_locale) {
88 JNIEnv* env = base::android::AttachCurrentThread();
89 ScopedJavaLocalRef<jobject> java_locale =
90 NewJavaLocale(env, locale);
91 ScopedJavaLocalRef<jobject> java_display_locale =
92 NewJavaLocale(env, display_locale);
93
94 ScopedJavaLocalRef<jstring> java_result(
95 Java_LocalizationUtils_getDisplayNameForLocale(
96 env,
97 java_locale.obj(),
98 java_display_locale.obj()));
99 return ConvertJavaStringToUTF16(java_result);
100 }
101
GetDurationString(JNIEnv * env,jclass clazz,jlong timeInMillis)102 jstring GetDurationString(JNIEnv* env, jclass clazz, jlong timeInMillis) {
103 ScopedJavaLocalRef<jstring> jtime_remaining =
104 base::android::ConvertUTF16ToJavaString(
105 env,
106 ui::TimeFormat::Simple(
107 ui::TimeFormat::FORMAT_REMAINING, ui::TimeFormat::LENGTH_SHORT,
108 base::TimeDelta::FromMilliseconds(timeInMillis)));
109 return jtime_remaining.Release();
110 }
111
RegisterLocalizationUtil(JNIEnv * env)112 bool RegisterLocalizationUtil(JNIEnv* env) {
113 return RegisterNativesImpl(env);
114 }
115
116 } // namespace l10n_util
117