l10n_util.cc revision cecae02673edd6b4cee88a9b87a61055a91f70bb 
1/*
2 * Copyright 2010, The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *  * Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 *  * Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "ui/base/l10n/l10n_util.h"
27
28#include "base/logging.h"
29#include "base/string_util.h"
30#include "base/utf_string_conversions.h"
31
32#include <utils/threads.h>
33
34namespace l10n_util {
35
36class JNIHelper {
37    public:
38        JNIHelper();
39        ~JNIHelper();
40        string16 getLocalisedString(int message_id);
41
42    private:
43        bool mInited;
44        jclass mClassRef;
45        android::Mutex mGetStringLock;
46};
47
48JNIHelper jniHelper;
49
50JNIHelper::JNIHelper()
51    : mInited(false)
52{
53}
54
55JNIHelper::~JNIHelper()
56{
57    JNIEnv* currentEnv = android::jni::GetJNIEnv();
58    if (currentEnv)
59        currentEnv->DeleteGlobalRef(mClassRef);
60}
61
62string16 JNIHelper::getLocalisedString(int message_id)
63{
64    android::Mutex::Autolock lock(mGetStringLock);
65    JNIEnv* env = android::jni::GetJNIEnv();
66    if (!mInited) {
67        jclass localClass = env->FindClass("android/webkit/L10nUtils");
68        mClassRef = static_cast<jclass>(env->NewGlobalRef(localClass));
69        env->DeleteLocalRef(localClass);
70        mInited = true;
71    }
72
73    static jmethodID getLocalisedString = env->GetStaticMethodID(mClassRef, "getLocalisedString", "(I)Ljava/lang/String;");
74    jstring result = static_cast<jstring>(env->CallStaticObjectMethod(mClassRef, getLocalisedString, message_id));
75    string16 str = android::jni::JstringToString16(env, result);
76    env->DeleteLocalRef(result);
77    return str;
78}
79
80// Implementation of the necessary libchromium l10n utility functions...
81
82string16 GetStringUTF16(int message_id)
83{
84    return jniHelper.getLocalisedString(message_id);
85}
86
87string16 GetStringFUTF16(int message_id, const string16& a, const string16& b, const string16& c)
88{
89    const string16 str = GetStringUTF16(message_id);
90    std::vector<string16> replacements;
91    replacements.push_back(a);
92    replacements.push_back(b);
93    replacements.push_back(c);
94    return ReplaceStringPlaceholders(str, replacements, NULL);
95}
96
97std::string GetApplicationLocale()
98{
99    JNIEnv* env = android::jni::GetJNIEnv();
100    jclass locale_class = env->FindClass("java/util/Locale");
101    jmethodID get_default_locale = env->GetStaticMethodID(locale_class, "getDefault", "()Ljava/util/Locale;");
102    jmethodID to_string = env->GetMethodID(locale_class, "toString", "()Ljava/lang/String;");
103    jobject locale_jobj = env->CallStaticObjectMethod(locale_class, get_default_locale);
104    jstring locale_jstr = static_cast<jstring>(env->CallObjectMethod(locale_jobj, to_string));
105    std::string locale = android::jni::JstringToStdString(env, locale_jstr);
106    env->DeleteLocalRef(locale_jstr);
107    env->DeleteLocalRef(locale_jobj);
108    env->DeleteLocalRef(locale_class);
109
110    return locale;
111}
112
113}
114