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 RENDER_SERVICE_CLIENT_CORE_PIPELINE_RS_ACCESSIBILITY_H 17 #define RENDER_SERVICE_CLIENT_CORE_PIPELINE_RS_ACCESSIBILITY_H 18 19 #include <functional> 20 21 #include "common/rs_macros.h" 22 23 namespace OHOS { 24 namespace Rosen { 25 class RSB_EXPORT RSAccessibility { 26 public: 27 static RSAccessibility &GetInstance(); 28 RSAccessibility() = default; 29 virtual ~RSAccessibility() = default; 30 31 using OnHighContrastChange = std::function<void(bool newHighContrast)>; 32 virtual void ListenHighContrastChange(OnHighContrastChange callback) = 0; 33 34 private: 35 RSAccessibility(RSAccessibility &&) = delete; 36 RSAccessibility(const RSAccessibility &) = delete; 37 RSAccessibility &operator =(RSAccessibility &&) = delete; 38 RSAccessibility &operator =(const RSAccessibility &) = delete; 39 }; 40 } // namespace Rosen 41 } // namespace OHOS 42 43 #endif // RENDER_SERVICE_CLIENT_CORE_PIPELINE_RS_ACCESSIBILITY_H 44