1 /* 2 * Copyright 2023 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 17 #pragma once 18 19 #include <android-base/result.h> 20 #include <input/Input.h> 21 #include "rust/cxx.h" 22 23 namespace android { 24 25 namespace input { 26 namespace verifier { 27 struct InputVerifier; 28 } 29 } // namespace input 30 31 /* 32 * Crash if the provided touch stream is inconsistent. 33 * This class is a pass-through to the rust implementation of InputVerifier. 34 * The rust class could also be used directly, but it would be less convenient. 35 * We can't directly invoke the rust methods on a rust object. So, there's no way to do: 36 * mVerifier.process_movement(...). 37 * This C++ class makes it a bit easier to use. 38 * 39 * TODO(b/211379801): Add support for hover events: 40 * - No hover move without enter 41 * - No touching pointers when hover enter 42 * - No hovering pointers when touching 43 * - Only 1 hovering pointer max 44 */ 45 class InputVerifier { 46 public: 47 InputVerifier(const std::string& name); 48 49 android::base::Result<void> processMovement(int32_t deviceId, int32_t source, int32_t action, 50 uint32_t pointerCount, 51 const PointerProperties* pointerProperties, 52 const PointerCoords* pointerCoords, int32_t flags); 53 54 void resetDevice(int32_t deviceId); 55 56 private: 57 rust::Box<android::input::verifier::InputVerifier> mVerifier; 58 }; 59 60 } // namespace android 61