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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <linux/input-event-codes.h>
#include <stdint.h>
#include <vector>
#include "EventHub.h"
#include "InputDevice.h"
namespace android {
/* Keeps track of the state of multi-touch protocol. */
class MultiTouchMotionAccumulator {
public:
class Slot {
public:
inline bool isInUse() const { return mInUse; }
inline int32_t getX() const { return mAbsMtPositionX; }
inline int32_t getY() const { return mAbsMtPositionY; }
inline int32_t getTouchMajor() const { return mAbsMtTouchMajor; }
inline int32_t getTouchMinor() const {
return mHaveAbsMtTouchMinor ? mAbsMtTouchMinor : mAbsMtTouchMajor;
}
inline int32_t getToolMajor() const { return mAbsMtWidthMajor; }
inline int32_t getToolMinor() const {
return mHaveAbsMtWidthMinor ? mAbsMtWidthMinor : mAbsMtWidthMajor;
}
inline int32_t getOrientation() const { return mAbsMtOrientation; }
inline int32_t getTrackingId() const { return mAbsMtTrackingId; }
inline int32_t getPressure() const { return mAbsMtPressure; }
inline int32_t getDistance() const { return mAbsMtDistance; }
ToolType getToolType() const;
private:
friend class MultiTouchMotionAccumulator;
bool mInUse = false;
bool mHaveAbsMtTouchMinor = false;
bool mHaveAbsMtWidthMinor = false;
bool mHaveAbsMtToolType = false;
int32_t mAbsMtPositionX = 0;
int32_t mAbsMtPositionY = 0;
int32_t mAbsMtTouchMajor = 0;
int32_t mAbsMtTouchMinor = 0;
int32_t mAbsMtWidthMajor = 0;
int32_t mAbsMtWidthMinor = 0;
int32_t mAbsMtOrientation = 0;
int32_t mAbsMtTrackingId = -1;
int32_t mAbsMtPressure = 0;
int32_t mAbsMtDistance = 0;
int32_t mAbsMtToolType = 0;
void clear() { *this = Slot(); }
};
MultiTouchMotionAccumulator();
void configure(const InputDeviceContext& deviceContext, size_t slotCount,
bool usingSlotsProtocol);
void process(const RawEvent* rawEvent);
void finishSync();
size_t getActiveSlotsCount() const;
inline size_t getSlotCount() const { return mSlots.size(); }
inline const Slot& getSlot(size_t index) const {
LOG_ALWAYS_FATAL_IF(index < 0 || index >= mSlots.size(), "Invalid index: %zu", index);
return mSlots[index];
}
void reset(const InputDeviceContext& deviceContext);
private:
int32_t mCurrentSlot;
std::vector<Slot> mSlots;
bool mUsingSlotsProtocol;
void resetSlots();
void warnIfNotInUse(const RawEvent& event, const Slot& slot);
};
} // namespace android
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