1 /*
2  * Copyright (c) 2023 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef IMF_SYSTEM_LANGUAGE_OBSERVER_H
17 #define IMF_SYSTEM_LANGUAGE_OBSERVER_H
18 
19 #include <functional>
20 #include <utility>
21 
22 namespace OHOS {
23 namespace MiscServices {
24 class SystemLanguageObserver {
25 public:
26     static SystemLanguageObserver &GetInstance();
27     void Watch();
28 
29 private:
30     static constexpr const char *SYSTEM_LANGUAGE_KEY = "persist.global.language";
31     SystemLanguageObserver() = default;
32     static void OnChange(const char *key, const char *value, void *context);
33 };
34 } // namespace MiscServices
35 } // namespace OHOS
36 
37 #endif // IMF_SYSTEM_LANGUAGE_OBSERVER_H
38