1 /* 2 * Copyright (c) 2021-2022 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 BATTERY_BACKLIGHT_H 17 #define BATTERY_BACKLIGHT_H 18 19 #include <string> 20 21 namespace OHOS { 22 namespace HDI { 23 namespace Battery { 24 namespace V1_1 { 25 class BatteryBacklight { 26 public: 27 BatteryBacklight(); 28 static int32_t InitBacklightSysfs(); 29 void TurnOnScreen(); 30 void TurnOffScreen(); 31 static int32_t HandleBacklight(uint32_t backlight); 32 bool GetScreenState() const; 33 private: 34 static void CreateFile(const std::string& path, const std::string& content) ; 35 static void InitDevicePah(std::string& path); 36 static void InitDefaultSysfs(); 37 static void TraversalBacklightNode(); 38 bool screenOn_ = false; 39 }; 40 } // namespace V1_1 41 } // namespace Battery 42 } // namespace HDI 43 } // namespace OHOS 44 #endif 45