129 lines
5.5 KiB
C++
129 lines
5.5 KiB
C++
/*
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "InputVerifier"
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#include <android-base/logging.h>
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#include <input/InputVerifier.h>
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namespace android {
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/**
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* Log all of the movements that are sent to this verifier. Helps to identify the streams that lead
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* to inconsistent events.
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* Enable this via "adb shell setprop log.tag.InputVerifierLogEvents DEBUG"
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*/
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static bool logEvents() {
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return __android_log_is_loggable(ANDROID_LOG_DEBUG, LOG_TAG "LogEvents", ANDROID_LOG_INFO);
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}
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// --- InputVerifier ---
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InputVerifier::InputVerifier(const std::string& name) : mName(name){};
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void InputVerifier::processMovement(int32_t deviceId, int32_t action, uint32_t pointerCount,
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const PointerProperties* pointerProperties,
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const PointerCoords* pointerCoords, int32_t flags) {
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if (logEvents()) {
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LOG(ERROR) << "Processing " << MotionEvent::actionToString(action) << " for device "
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<< deviceId << " (" << pointerCount << " pointer"
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<< (pointerCount == 1 ? "" : "s") << ") on " << mName;
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}
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switch (MotionEvent::getActionMasked(action)) {
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case AMOTION_EVENT_ACTION_DOWN: {
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auto [it, inserted] = mTouchingPointerIdsByDevice.insert({deviceId, {}});
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if (!inserted) {
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LOG(FATAL) << "Got ACTION_DOWN, but already have touching pointers " << it->second
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<< " for device " << deviceId << " on " << mName;
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}
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it->second.set(pointerProperties[0].id);
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break;
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}
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case AMOTION_EVENT_ACTION_POINTER_DOWN: {
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auto it = mTouchingPointerIdsByDevice.find(deviceId);
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if (it == mTouchingPointerIdsByDevice.end()) {
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LOG(FATAL) << "Got POINTER_DOWN, but no touching pointers for device " << deviceId
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<< " on " << mName;
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}
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it->second.set(pointerProperties[MotionEvent::getActionIndex(action)].id);
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break;
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}
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case AMOTION_EVENT_ACTION_MOVE: {
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ensureTouchingPointersMatch(deviceId, pointerCount, pointerProperties, "MOVE");
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break;
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}
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case AMOTION_EVENT_ACTION_POINTER_UP: {
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auto it = mTouchingPointerIdsByDevice.find(deviceId);
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if (it == mTouchingPointerIdsByDevice.end()) {
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LOG(FATAL) << "Got POINTER_UP, but no touching pointers for device " << deviceId
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<< " on " << mName;
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}
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it->second.reset(pointerProperties[MotionEvent::getActionIndex(action)].id);
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break;
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}
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case AMOTION_EVENT_ACTION_UP: {
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auto it = mTouchingPointerIdsByDevice.find(deviceId);
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if (it == mTouchingPointerIdsByDevice.end()) {
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LOG(FATAL) << "Got ACTION_UP, but no record for deviceId " << deviceId << " on "
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<< mName;
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}
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const auto& [_, touchingPointerIds] = *it;
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if (touchingPointerIds.count() != 1) {
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LOG(FATAL) << "Got ACTION_UP, but we have pointers: " << touchingPointerIds
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<< " for deviceId " << deviceId << " on " << mName;
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}
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const int32_t pointerId = pointerProperties[0].id;
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if (!touchingPointerIds.test(pointerId)) {
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LOG(FATAL) << "Got ACTION_UP, but pointerId " << pointerId
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<< " is not touching. Touching pointers: " << touchingPointerIds
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<< " for deviceId " << deviceId << " on " << mName;
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}
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mTouchingPointerIdsByDevice.erase(it);
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break;
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}
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case AMOTION_EVENT_ACTION_CANCEL: {
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if ((flags & AMOTION_EVENT_FLAG_CANCELED) != AMOTION_EVENT_FLAG_CANCELED) {
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LOG(FATAL) << "For ACTION_CANCEL, must set FLAG_CANCELED";
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}
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ensureTouchingPointersMatch(deviceId, pointerCount, pointerProperties, "CANCEL");
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mTouchingPointerIdsByDevice.erase(deviceId);
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break;
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}
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}
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}
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void InputVerifier::ensureTouchingPointersMatch(int32_t deviceId, uint32_t pointerCount,
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const PointerProperties* pointerProperties,
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const char* action) const {
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auto it = mTouchingPointerIdsByDevice.find(deviceId);
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if (it == mTouchingPointerIdsByDevice.end()) {
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LOG(FATAL) << "Got " << action << ", but no touching pointers for device " << deviceId
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<< " on " << mName;
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}
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const auto& [_, touchingPointerIds] = *it;
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for (size_t i = 0; i < pointerCount; i++) {
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const int32_t pointerId = pointerProperties[i].id;
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if (!touchingPointerIds.test(pointerId)) {
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LOG(FATAL) << "Got " << action << " for pointerId " << pointerId
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<< " but the touching pointers are " << touchingPointerIds << " on "
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<< mName;
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}
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}
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};
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} // namespace android
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