1 /* 2 * Copyright (C) 2022 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 "InputListener.h" 20 21 namespace android { 22 23 /** 24 * Base interface for an InputListener stage. 25 * Blocks unintentional input events. Not thread safe. Must be called from the same 26 * thread. All work is performed on the calling threads. 27 */ 28 class UnwantedInteractionBlockerInterface : public InputListenerInterface { 29 public: 30 /* Notifies the input reader policy that some input devices have changed 31 * and provides information about all current input devices. 32 * Important! This call should happen on the same thread as the calls to the 33 * InputListenerInterface methods. 34 * That is, same thread should call 'notifyMotion' and 'notifyInputDevicesChanged' and 35 * 'notifyDeviceReset'. If this architecture changes, we will need to make the implementation 36 * of this interface thread-safe. 37 */ 38 virtual void notifyInputDevicesChanged(const std::vector<InputDeviceInfo>& inputDevices) = 0; 39 40 /** 41 * Dump the state of the interaction blocker. 42 * This method may be called on any thread (usually by the input manager on a binder thread). 43 */ 44 virtual void dump(std::string& dump) = 0; 45 46 /* Called by the heatbeat to ensures that the blocker has not deadlocked. */ 47 virtual void monitor() = 0; 48 UnwantedInteractionBlockerInterface()49 UnwantedInteractionBlockerInterface() {} ~UnwantedInteractionBlockerInterface()50 ~UnwantedInteractionBlockerInterface() override {} 51 }; 52 53 } // namespace android 54