Home | History | Annotate | Download | only in l10n 
      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 
     34 namespace l10n_util {
     35 
     36 class 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 
     48 JNIHelper jniHelper;
     49 
     50 JNIHelper::JNIHelper()
     51     : mInited(false)
     52 {
     53 }
     54 
     55 JNIHelper::~JNIHelper()
     56 {
     57     if (!mInited)
     58         return;
     59 
     60     android::jni::GetJNIEnv()->DeleteGlobalRef(mClassRef);
     61 }
     62 
     63 string16 JNIHelper::getLocalisedString(int message_id)
     64 {
     65     android::Mutex::Autolock lock(mGetStringLock);
     66     JNIEnv* env = android::jni::GetJNIEnv();
     67     if (!mInited) {
     68         jclass localClass = env->FindClass("android/webkit/L10nUtils");
     69         mClassRef = static_cast<jclass>(env->NewGlobalRef(localClass));
     70         env->DeleteLocalRef(localClass);
     71         mInited = true;
     72     }
     73 
     74     static jmethodID getLocalisedString = env->GetStaticMethodID(mClassRef, "getLocalisedString", "(I)Ljava/lang/String;");
     75     jstring result = static_cast<jstring>(env->CallStaticObjectMethod(mClassRef, getLocalisedString, message_id));
     76     string16 str = android::jni::JstringToString16(env, result);
     77     env->DeleteLocalRef(result);
     78     return str;
     79 }
     80 
     81 // Implementation of the necessary libchromium l10n utility functions...
     82 
     83 string16 GetStringUTF16(int message_id)
     84 {
     85     return jniHelper.getLocalisedString(message_id);
     86 }
     87 
     88 string16 GetStringFUTF16(int message_id, const string16& a, const string16& b, const string16& c)
     89 {
     90     const string16 str = GetStringUTF16(message_id);
     91     std::vector<string16> replacements;
     92     replacements.push_back(a);
     93     replacements.push_back(b);
     94     replacements.push_back(c);
     95     return ReplaceStringPlaceholders(str, replacements, NULL);
     96 }
     97 
     98 std::string GetApplicationLocale()
     99 {
    100     JNIEnv* env = android::jni::GetJNIEnv();
    101     jclass locale_class = env->FindClass("java/util/Locale");
    102     jmethodID get_default_locale = env->GetStaticMethodID(locale_class, "getDefault", "()Ljava/util/Locale;");
    103     jmethodID to_string = env->GetMethodID(locale_class, "toString", "()Ljava/lang/String;");
    104     jobject locale_jobj = env->CallStaticObjectMethod(locale_class, get_default_locale);
    105     jstring locale_jstr = static_cast<jstring>(env->CallObjectMethod(locale_jobj, to_string));
    106     std::string locale = android::jni::JstringToStdString(env, locale_jstr);
    107     env->DeleteLocalRef(locale_jstr);
    108     env->DeleteLocalRef(locale_jobj);
    109     env->DeleteLocalRef(locale_class);
    110 
    111     return locale;
    112 }
    113 
    114 }
    115