1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef CAR_KEVENTREADER_INPUTSOURCE 17 #define CAR_KEVENTREADER_INPUTSOURCE 18 19 #include <linux/input.h> 20 #include <optional> 21 #include <string> 22 #include "event.h" 23 24 namespace com::android::car::keventreader { 25 class InputSource { 26 public: 27 explicit InputSource(const char* file); 28 29 explicit operator bool() const; 30 31 int descriptor() const; 32 33 std::optional<com::android::car::keventreader::KeypressEvent> read() const; 34 35 virtual ~InputSource(); 36 private: 37 struct kevent : public ::input_event { 38 kevent(); 39 bool isKeypress() const; 40 bool isKeydown() const; 41 bool isKeyup() const; 42 }; 43 static_assert(sizeof(kevent) == sizeof(::input_event), "do not add data to input_event"); 44 45 std::string mFilePath; 46 int mDescriptor; 47 }; 48 } 49 50 #endif //CAR_KEVENTREADER_INPUTSOURCE 51