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/*
* Copyright (C) 2010 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 <PointerControllerInterface.h>
#include <android-base/thread_annotations.h>
#include <utils/Condition.h>
#include <utils/Mutex.h>
#include <memory>
#include <unordered_map>
#include <vector>
#include "EventHub.h"
#include "InputListener.h"
#include "InputReaderBase.h"
#include "InputReaderContext.h"
#include "InputThread.h"
namespace android {
class InputDevice;
class InputMapper;
struct StylusState;
/* The input reader reads raw event data from the event hub and processes it into input events
* that it sends to the input listener. Some functions of the input reader, such as early
* event filtering in low power states, are controlled by a separate policy object.
*
* The InputReader owns a collection of InputMappers. InputReader starts its own thread, where
* most of the work happens, but the InputReader can receive queries from other system
* components running on arbitrary threads. To keep things manageable, the InputReader
* uses a single Mutex to guard its state. The Mutex may be held while calling into the
* EventHub or the InputReaderPolicy but it is never held while calling into the
* InputListener. All calls to InputListener must happen from InputReader's thread.
*/
class InputReader : public InputReaderInterface {
public:
InputReader(std::shared_ptr<EventHubInterface> eventHub,
const sp<InputReaderPolicyInterface>& policy, InputListenerInterface& listener);
virtual ~InputReader();
void dump(std::string& dump) override;
void monitor() override;
status_t start() override;
status_t stop() override;
std::vector<InputDeviceInfo> getInputDevices() const override;
bool isInputDeviceEnabled(int32_t deviceId) override;
int32_t getScanCodeState(int32_t deviceId, uint32_t sourceMask, int32_t scanCode) override;
int32_t getKeyCodeState(int32_t deviceId, uint32_t sourceMask, int32_t keyCode) override;
int32_t getSwitchState(int32_t deviceId, uint32_t sourceMask, int32_t sw) override;
void addKeyRemapping(int32_t deviceId, int32_t fromKeyCode, int32_t toKeyCode) const override;
int32_t getKeyCodeForKeyLocation(int32_t deviceId, int32_t locationKeyCode) const override;
void toggleCapsLockState(int32_t deviceId) override;
bool hasKeys(int32_t deviceId, uint32_t sourceMask, const std::vector<int32_t>& keyCodes,
uint8_t* outFlags) override;
void requestRefreshConfiguration(ConfigurationChanges changes) override;
void vibrate(int32_t deviceId, const VibrationSequence& sequence, ssize_t repeat,
int32_t token) override;
void cancelVibrate(int32_t deviceId, int32_t token) override;
bool isVibrating(int32_t deviceId) override;
std::vector<int32_t> getVibratorIds(int32_t deviceId) override;
bool canDispatchToDisplay(int32_t deviceId, int32_t displayId) override;
bool enableSensor(int32_t deviceId, InputDeviceSensorType sensorType,
std::chrono::microseconds samplingPeriod,
std::chrono::microseconds maxBatchReportLatency) override;
void disableSensor(int32_t deviceId, InputDeviceSensorType sensorType) override;
void flushSensor(int32_t deviceId, InputDeviceSensorType sensorType) override;
std::optional<int32_t> getBatteryCapacity(int32_t deviceId) override;
std::optional<int32_t> getBatteryStatus(int32_t deviceId) override;
std::optional<std::string> getBatteryDevicePath(int32_t deviceId) override;
std::vector<InputDeviceLightInfo> getLights(int32_t deviceId) override;
std::vector<InputDeviceSensorInfo> getSensors(int32_t deviceId) override;
bool setLightColor(int32_t deviceId, int32_t lightId, int32_t color) override;
bool setLightPlayerId(int32_t deviceId, int32_t lightId, int32_t playerId) override;
std::optional<int32_t> getLightColor(int32_t deviceId, int32_t lightId) override;
std::optional<int32_t> getLightPlayerId(int32_t deviceId, int32_t lightId) override;
std::optional<std::string> getBluetoothAddress(int32_t deviceId) const override;
void sysfsNodeChanged(const std::string& sysfsNodePath) override;
protected:
// These members are protected so they can be instrumented by test cases.
virtual std::shared_ptr<InputDevice> createDeviceLocked(nsecs_t when, int32_t deviceId,
const InputDeviceIdentifier& identifier)
REQUIRES(mLock);
// With each iteration of the loop, InputReader reads and processes one incoming message from
// the EventHub.
void loopOnce();
class ContextImpl : public InputReaderContext {
InputReader* mReader;
IdGenerator mIdGenerator;
public:
explicit ContextImpl(InputReader* reader);
// lock is already held by the input loop
void updateGlobalMetaState() NO_THREAD_SAFETY_ANALYSIS override;
int32_t getGlobalMetaState() NO_THREAD_SAFETY_ANALYSIS override;
void disableVirtualKeysUntil(nsecs_t time) REQUIRES(mReader->mLock) override;
bool shouldDropVirtualKey(nsecs_t now, int32_t keyCode, int32_t scanCode)
REQUIRES(mReader->mLock) override;
void fadePointer() REQUIRES(mReader->mLock) override;
std::shared_ptr<PointerControllerInterface> getPointerController(int32_t deviceId)
REQUIRES(mReader->mLock) override;
void requestTimeoutAtTime(nsecs_t when) REQUIRES(mReader->mLock) override;
int32_t bumpGeneration() NO_THREAD_SAFETY_ANALYSIS override;
void getExternalStylusDevices(std::vector<InputDeviceInfo>& outDevices)
REQUIRES(mReader->mLock) override;
[[nodiscard]] std::list<NotifyArgs> dispatchExternalStylusState(const StylusState& outState)
REQUIRES(mReader->mLock) override;
InputReaderPolicyInterface* getPolicy() REQUIRES(mReader->mLock) override;
EventHubInterface* getEventHub() REQUIRES(mReader->mLock) override;
int32_t getNextId() NO_THREAD_SAFETY_ANALYSIS override;
void updateLedMetaState(int32_t metaState) REQUIRES(mReader->mLock) override;
int32_t getLedMetaState() REQUIRES(mReader->mLock) REQUIRES(mLock) override;
void setPreventingTouchpadTaps(bool prevent) REQUIRES(mReader->mLock)
REQUIRES(mLock) override;
bool isPreventingTouchpadTaps() REQUIRES(mReader->mLock) REQUIRES(mLock) override;
void setLastKeyDownTimestamp(nsecs_t when) REQUIRES(mReader->mLock)
REQUIRES(mLock) override;
nsecs_t getLastKeyDownTimestamp() REQUIRES(mReader->mLock) REQUIRES(mLock) override;
} mContext;
friend class ContextImpl;
// Test cases need to override the locked functions
mutable std::mutex mLock;
private:
std::unique_ptr<InputThread> mThread;
std::condition_variable mReaderIsAliveCondition;
// This could be unique_ptr, but due to the way InputReader tests are written,
// it is made shared_ptr here. In the tests, an EventHub reference is retained by the test
// in parallel to passing it to the InputReader.
std::shared_ptr<EventHubInterface> mEventHub;
sp<InputReaderPolicyInterface> mPolicy;
// The next stage that should receive the events generated inside InputReader.
InputListenerInterface& mNextListener;
// As various events are generated inside InputReader, they are stored inside this list. The
// list can only be accessed with the lock, so the events inside it are well-ordered.
// Once the reader is done working, these events will be swapped into a temporary storage and
// sent to the 'mNextListener' without holding the lock.
std::list<NotifyArgs> mPendingArgs GUARDED_BY(mLock);
InputReaderConfiguration mConfig GUARDED_BY(mLock);
// An input device can represent a collection of EventHub devices. This map provides a way
// to lookup the input device instance from the EventHub device id.
std::unordered_map<int32_t /*eventHubId*/, std::shared_ptr<InputDevice>> mDevices
GUARDED_BY(mLock);
// An input device contains one or more eventHubId, this map provides a way to lookup the
// EventHubIds contained in the input device from the input device instance.
std::unordered_map<std::shared_ptr<InputDevice>, std::vector<int32_t> /*eventHubId*/>
mDeviceToEventHubIdsMap GUARDED_BY(mLock);
// true if tap-to-click on touchpad currently disabled
bool mPreventingTouchpadTaps GUARDED_BY(mLock){false};
// records timestamp of the last key press on the physical keyboard
nsecs_t mLastKeyDownTimestamp GUARDED_BY(mLock){0};
// low-level input event decoding and device management
[[nodiscard]] std::list<NotifyArgs> processEventsLocked(const RawEvent* rawEvents, size_t count)
REQUIRES(mLock);
void addDeviceLocked(nsecs_t when, int32_t eventHubId) REQUIRES(mLock);
void removeDeviceLocked(nsecs_t when, int32_t eventHubId) REQUIRES(mLock);
[[nodiscard]] std::list<NotifyArgs> processEventsForDeviceLocked(int32_t eventHubId,
const RawEvent* rawEvents,
size_t count) REQUIRES(mLock);
[[nodiscard]] std::list<NotifyArgs> timeoutExpiredLocked(nsecs_t when) REQUIRES(mLock);
void handleConfigurationChangedLocked(nsecs_t when) REQUIRES(mLock);
int32_t mGlobalMetaState GUARDED_BY(mLock);
void updateGlobalMetaStateLocked() REQUIRES(mLock);
int32_t getGlobalMetaStateLocked() REQUIRES(mLock);
int32_t mLedMetaState GUARDED_BY(mLock);
void updateLedMetaStateLocked(int32_t metaState) REQUIRES(mLock);
int32_t getLedMetaStateLocked() REQUIRES(mLock);
void notifyExternalStylusPresenceChangedLocked() REQUIRES(mLock);
void getExternalStylusDevicesLocked(std::vector<InputDeviceInfo>& outDevices) REQUIRES(mLock);
[[nodiscard]] std::list<NotifyArgs> dispatchExternalStylusStateLocked(const StylusState& state)
REQUIRES(mLock);
// The PointerController that is shared among all the input devices that need it.
std::weak_ptr<PointerControllerInterface> mPointerController;
std::shared_ptr<PointerControllerInterface> getPointerControllerLocked(int32_t deviceId)
REQUIRES(mLock);
void updatePointerDisplayLocked() REQUIRES(mLock);
void fadePointerLocked() REQUIRES(mLock);
int32_t mGeneration GUARDED_BY(mLock);
int32_t bumpGenerationLocked() REQUIRES(mLock);
int32_t mNextInputDeviceId GUARDED_BY(mLock);
int32_t nextInputDeviceIdLocked() REQUIRES(mLock);
std::vector<InputDeviceInfo> getInputDevicesLocked() const REQUIRES(mLock);
nsecs_t mDisableVirtualKeysTimeout GUARDED_BY(mLock);
void disableVirtualKeysUntilLocked(nsecs_t time) REQUIRES(mLock);
bool shouldDropVirtualKeyLocked(nsecs_t now, int32_t keyCode, int32_t scanCode) REQUIRES(mLock);
nsecs_t mNextTimeout GUARDED_BY(mLock);
void requestTimeoutAtTimeLocked(nsecs_t when) REQUIRES(mLock);
ConfigurationChanges mConfigurationChangesToRefresh GUARDED_BY(mLock);
void refreshConfigurationLocked(ConfigurationChanges changes) REQUIRES(mLock);
PointerCaptureRequest mCurrentPointerCaptureRequest GUARDED_BY(mLock);
// state queries
typedef int32_t (InputDevice::*GetStateFunc)(uint32_t sourceMask, int32_t code);
int32_t getStateLocked(int32_t deviceId, uint32_t sourceMask, int32_t code,
GetStateFunc getStateFunc) REQUIRES(mLock);
bool markSupportedKeyCodesLocked(int32_t deviceId, uint32_t sourceMask,
const std::vector<int32_t>& keyCodes, uint8_t* outFlags)
REQUIRES(mLock);
// find an InputDevice from an InputDevice id
InputDevice* findInputDeviceLocked(int32_t deviceId) const REQUIRES(mLock);
};
} // namespace android
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