include/input/InputDevice.h - LeafOS-Project/android_frameworks_native - Gitiles

 /*
  * Copyright (C) 2012 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 <android/sensor.h>
 #include <ftl/flags.h>
 #include <ftl/mixins.h>
 #include <input/Input.h>
 #include <input/KeyCharacterMap.h>
 #include <set>
 #include <unordered_map>
 #include <vector>

 #include <android/os/IInputConstants.h>

 namespace android {

 /*
  * Identifies a device.
  */
 struct InputDeviceIdentifier {
     inline InputDeviceIdentifier() :
             bus(0), vendor(0), product(0), version(0) {
     }

     // Information provided by the kernel.
     std::string name;
     std::string location;
     std::string uniqueId;
     uint16_t bus;
     uint16_t vendor;
     uint16_t product;
     uint16_t version;

     // A composite input device descriptor string that uniquely identifies the device
     // even across reboots or reconnections.  The value of this field is used by
     // upper layers of the input system to associate settings with individual devices.
     // It is hashed from whatever kernel provided information is available.
     // Ideally, the way this value is computed should not change between Android releases
     // because that would invalidate persistent settings that rely on it.
     std::string descriptor;

     // A value added to uniquely identify a device in the absence of a unique id. This
     // is intended to be a minimum way to distinguish from other active devices and may
     // reuse values that are not associated with an input anymore.
     uint16_t nonce;

     // The bluetooth address of the device, if known.
     std::optional<std::string> bluetoothAddress;

     /**
      * Return InputDeviceIdentifier.name that has been adjusted as follows:
      *     - all characters besides alphanumerics, dash,
      *       and underscore have been replaced with underscores.
      * This helps in situations where a file that matches the device name is needed,
      * while conforming to the filename limitations.
      */
     std::string getCanonicalName() const;

     bool operator==(const InputDeviceIdentifier&) const = default;
     bool operator!=(const InputDeviceIdentifier&) const = default;
 };

 /**
  * Holds View related behaviors for an InputDevice.
  */
 struct InputDeviceViewBehavior {
     /**
      * The smooth scroll behavior that applies for all source/axis, if defined by the device.
      * Empty optional if the device has not specified the default smooth scroll behavior.
      */
     std::optional<bool> shouldSmoothScroll;
 };

 /* Types of input device sensors. Keep sync with core/java/android/hardware/Sensor.java */
 enum class InputDeviceSensorType : int32_t {
     ACCELEROMETER = ASENSOR_TYPE_ACCELEROMETER,
     MAGNETIC_FIELD = ASENSOR_TYPE_MAGNETIC_FIELD,
     ORIENTATION = 3,
     GYROSCOPE = ASENSOR_TYPE_GYROSCOPE,
     LIGHT = ASENSOR_TYPE_LIGHT,
     PRESSURE = ASENSOR_TYPE_PRESSURE,
     TEMPERATURE = 7,
     PROXIMITY = ASENSOR_TYPE_PROXIMITY,
     GRAVITY = ASENSOR_TYPE_GRAVITY,
     LINEAR_ACCELERATION = ASENSOR_TYPE_LINEAR_ACCELERATION,
     ROTATION_VECTOR = ASENSOR_TYPE_ROTATION_VECTOR,
     RELATIVE_HUMIDITY = ASENSOR_TYPE_RELATIVE_HUMIDITY,
     AMBIENT_TEMPERATURE = ASENSOR_TYPE_AMBIENT_TEMPERATURE,
     MAGNETIC_FIELD_UNCALIBRATED = ASENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED,
     GAME_ROTATION_VECTOR = ASENSOR_TYPE_GAME_ROTATION_VECTOR,
     GYROSCOPE_UNCALIBRATED = ASENSOR_TYPE_GYROSCOPE_UNCALIBRATED,
     SIGNIFICANT_MOTION = ASENSOR_TYPE_SIGNIFICANT_MOTION,

     ftl_first = ACCELEROMETER,
     ftl_last = SIGNIFICANT_MOTION
 };

 enum class InputDeviceSensorAccuracy : int32_t {
     ACCURACY_NONE = 0,
     ACCURACY_LOW = 1,
     ACCURACY_MEDIUM = 2,
     ACCURACY_HIGH = 3,
 };

 enum class InputDeviceSensorReportingMode : int32_t {
     CONTINUOUS = 0,
     ON_CHANGE = 1,
     ONE_SHOT = 2,
     SPECIAL_TRIGGER = 3,
 };

 enum class InputDeviceLightType : int32_t {
     INPUT = 0,
     PLAYER_ID = 1,
     KEYBOARD_BACKLIGHT = 2,

     ftl_last = KEYBOARD_BACKLIGHT
 };

 enum class InputDeviceLightCapability : uint32_t {
     /** Capability to change brightness of the light */
     BRIGHTNESS = 0x00000001,
     /** Capability to change color of the light */
     RGB = 0x00000002,
 };

 struct InputDeviceSensorInfo {
     explicit InputDeviceSensorInfo(std::string name, std::string vendor, int32_t version,
                                    InputDeviceSensorType type, InputDeviceSensorAccuracy accuracy,
                                    float maxRange, float resolution, float power, int32_t minDelay,
                                    int32_t fifoReservedEventCount, int32_t fifoMaxEventCount,
                                    std::string stringType, int32_t maxDelay, int32_t flags,
                                    int32_t id)
           : name(name),
             vendor(vendor),
             version(version),
             type(type),
             accuracy(accuracy),
             maxRange(maxRange),
             resolution(resolution),
             power(power),
             minDelay(minDelay),
             fifoReservedEventCount(fifoReservedEventCount),
             fifoMaxEventCount(fifoMaxEventCount),
             stringType(stringType),
             maxDelay(maxDelay),
             flags(flags),
             id(id) {}
     // Name string of the sensor.
     std::string name;
     // Vendor string of this sensor.
     std::string vendor;
     // Version of the sensor's module.
     int32_t version;
     // Generic type of this sensor.
     InputDeviceSensorType type;
     // The current accuracy of sensor event.
     InputDeviceSensorAccuracy accuracy;
     // Maximum range of the sensor in the sensor's unit.
     float maxRange;
     // Resolution of the sensor in the sensor's unit.
     float resolution;
     // The power in mA used by this sensor while in use.
     float power;
     // The minimum delay allowed between two events in microsecond or zero if this sensor only
     // returns a value when the data it's measuring changes.
     int32_t minDelay;
     // Number of events reserved for this sensor in the batch mode FIFO.
     int32_t fifoReservedEventCount;
     // Maximum number of events of this sensor that could be batched.
     int32_t fifoMaxEventCount;
     // The type of this sensor as a string.
     std::string stringType;
     // The delay between two sensor events corresponding to the lowest frequency that this sensor
     // supports.
     int32_t maxDelay;
     // Sensor flags
     int32_t flags;
     // Sensor id, same as the input device ID it belongs to.
     int32_t id;
 };

 struct BrightnessLevel : ftl::DefaultConstructible<BrightnessLevel, std::uint8_t>,
                          ftl::Equatable<BrightnessLevel>,
                          ftl::Orderable<BrightnessLevel>,
                          ftl::Addable<BrightnessLevel> {
     using DefaultConstructible::DefaultConstructible;
 };

 struct InputDeviceLightInfo {
     explicit InputDeviceLightInfo(std::string name, int32_t id, InputDeviceLightType type,
                                   ftl::Flags<InputDeviceLightCapability> capabilityFlags,
                                   int32_t ordinal,
                                   std::set<BrightnessLevel> preferredBrightnessLevels)
           : name(name),
             id(id),
             type(type),
             capabilityFlags(capabilityFlags),
             ordinal(ordinal),
             preferredBrightnessLevels(std::move(preferredBrightnessLevels)) {}
     // Name string of the light.
     std::string name;
     // Light id
     int32_t id;
     // Type of the light.
     InputDeviceLightType type;
     // Light capabilities.
     ftl::Flags<InputDeviceLightCapability> capabilityFlags;
     // Ordinal of the light
     int32_t ordinal;
     // Custom brightness levels for the light
     std::set<BrightnessLevel> preferredBrightnessLevels;
 };

 struct InputDeviceBatteryInfo {
     explicit InputDeviceBatteryInfo(std::string name, int32_t id) : name(name), id(id) {}
     // Name string of the battery.
     std::string name;
     // Battery id
     int32_t id;
 };

 struct KeyboardLayoutInfo {
     explicit KeyboardLayoutInfo(std::string languageTag, std::string layoutType)
           : languageTag(languageTag), layoutType(layoutType) {}

     // A BCP 47 conformant language tag such as "en-US".
     std::string languageTag;
     // The layout type such as QWERTY or AZERTY.
     std::string layoutType;

     inline bool operator==(const KeyboardLayoutInfo& other) const {
         return languageTag == other.languageTag && layoutType == other.layoutType;
     }
     inline bool operator!=(const KeyboardLayoutInfo& other) const { return !(*this == other); }
 };

 // The version of the Universal Stylus Initiative (USI) protocol supported by the input device.
 struct InputDeviceUsiVersion {
     int32_t majorVersion = -1;
     int32_t minorVersion = -1;
 };

 /*
  * Describes the characteristics and capabilities of an input device.
  */
 class InputDeviceInfo {
 public:
     InputDeviceInfo();
     InputDeviceInfo(const InputDeviceInfo& other);
     ~InputDeviceInfo();

     struct MotionRange {
         int32_t axis;
         uint32_t source;
         float min;
         float max;
         float flat;
         float fuzz;
         float resolution;
     };

     void initialize(int32_t id, int32_t generation, int32_t controllerNumber,
                     const InputDeviceIdentifier& identifier, const std::string& alias,
                     bool isExternal, bool hasMic, int32_t associatedDisplayId,
                     InputDeviceViewBehavior viewBehavior = {{}});

     inline int32_t getId() const { return mId; }
     inline int32_t getControllerNumber() const { return mControllerNumber; }
     inline int32_t getGeneration() const { return mGeneration; }
     inline const InputDeviceIdentifier& getIdentifier() const { return mIdentifier; }
     inline const std::string& getAlias() const { return mAlias; }
     inline const std::string& getDisplayName() const {
         return mAlias.empty() ? mIdentifier.name : mAlias;
     }
     inline bool isExternal() const { return mIsExternal; }
     inline bool hasMic() const { return mHasMic; }
     inline uint32_t getSources() const { return mSources; }

     const MotionRange* getMotionRange(int32_t axis, uint32_t source) const;

     void addSource(uint32_t source);
     void addMotionRange(int32_t axis, uint32_t source,
             float min, float max, float flat, float fuzz, float resolution);
     void addMotionRange(const MotionRange& range);
     void addSensorInfo(const InputDeviceSensorInfo& info);
     void addBatteryInfo(const InputDeviceBatteryInfo& info);
     void addLightInfo(const InputDeviceLightInfo& info);

     void setKeyboardType(int32_t keyboardType);
     inline int32_t getKeyboardType() const { return mKeyboardType; }

     void setKeyboardLayoutInfo(KeyboardLayoutInfo keyboardLayoutInfo);
     inline const std::optional<KeyboardLayoutInfo>& getKeyboardLayoutInfo() const {
         return mKeyboardLayoutInfo;
     }

     inline const InputDeviceViewBehavior& getViewBehavior() const { return mViewBehavior; }

     inline void setKeyCharacterMap(const std::shared_ptr<KeyCharacterMap> value) {
         mKeyCharacterMap = value;
     }

     inline const std::shared_ptr<KeyCharacterMap> getKeyCharacterMap() const {
         return mKeyCharacterMap;
     }

     inline void setVibrator(bool hasVibrator) { mHasVibrator = hasVibrator; }
     inline bool hasVibrator() const { return mHasVibrator; }

     inline void setHasBattery(bool hasBattery) { mHasBattery = hasBattery; }
     inline bool hasBattery() const { return mHasBattery; }

     inline void setButtonUnderPad(bool hasButton) { mHasButtonUnderPad = hasButton; }
     inline bool hasButtonUnderPad() const { return mHasButtonUnderPad; }

     inline void setHasSensor(bool hasSensor) { mHasSensor = hasSensor; }
     inline bool hasSensor() const { return mHasSensor; }

     inline const std::vector<MotionRange>& getMotionRanges() const {
         return mMotionRanges;
     }

     std::vector<InputDeviceSensorInfo> getSensors();

     std::vector<InputDeviceLightInfo> getLights();

     inline void setUsiVersion(std::optional<InputDeviceUsiVersion> usiVersion) {
         mUsiVersion = std::move(usiVersion);
     }
     inline std::optional<InputDeviceUsiVersion> getUsiVersion() const { return mUsiVersion; }

     inline int32_t getAssociatedDisplayId() const { return mAssociatedDisplayId; }

 private:
     int32_t mId;
     int32_t mGeneration;
     int32_t mControllerNumber;
     InputDeviceIdentifier mIdentifier;
     std::string mAlias;
     bool mIsExternal;
     bool mHasMic;
     std::optional<KeyboardLayoutInfo> mKeyboardLayoutInfo;
     uint32_t mSources;
     int32_t mKeyboardType;
     std::shared_ptr<KeyCharacterMap> mKeyCharacterMap;
     std::optional<InputDeviceUsiVersion> mUsiVersion;
     int32_t mAssociatedDisplayId;

     bool mHasVibrator;
     bool mHasBattery;
     bool mHasButtonUnderPad;
     bool mHasSensor;

     std::vector<MotionRange> mMotionRanges;
     std::unordered_map<InputDeviceSensorType, InputDeviceSensorInfo> mSensors;
     /* Map from light ID to light info */
     std::unordered_map<int32_t, InputDeviceLightInfo> mLights;
     /* Map from battery ID to battery info */
     std::unordered_map<int32_t, InputDeviceBatteryInfo> mBatteries;
     /** The View related behaviors for the device. */
     InputDeviceViewBehavior mViewBehavior;
 };

 /* Types of input device configuration files. */
 enum class InputDeviceConfigurationFileType : int32_t {
     CONFIGURATION = 0,     /* .idc file */
     KEY_LAYOUT = 1,        /* .kl file */
     KEY_CHARACTER_MAP = 2, /* .kcm file */
 };

 /*
  * Gets the path of an input device configuration file, if one is available.
  * Considers both system provided and user installed configuration files.
  * The optional suffix is appended to the end of the file name (before the
  * extension).
  *
  * The device identifier is used to construct several default configuration file
  * names to try based on the device name, vendor, product, and version.
  *
  * Returns an empty string if not found.
  */
 extern std::string getInputDeviceConfigurationFilePathByDeviceIdentifier(
         const InputDeviceIdentifier& deviceIdentifier, InputDeviceConfigurationFileType type,
         const char* suffix = "");

 /*
  * Gets the path of an input device configuration file, if one is available.
  * Considers both system provided and user installed configuration files.
  *
  * The name is case-sensitive and is used to construct the filename to resolve.
  * All characters except 'a'-'z', 'A'-'Z', '0'-'9', '-', and '_' are replaced by underscores.
  *
  * Returns an empty string if not found.
  */
 extern std::string getInputDeviceConfigurationFilePathByName(
         const std::string& name, InputDeviceConfigurationFileType type);

 enum ReservedInputDeviceId : int32_t {
     // Device id representing an invalid device
     INVALID_INPUT_DEVICE_ID = android::os::IInputConstants::INVALID_INPUT_DEVICE_ID,
     // Device id of a special "virtual" keyboard that is always present.
     VIRTUAL_KEYBOARD_ID = -1,
     // Device id of the "built-in" keyboard if there is one.
     BUILT_IN_KEYBOARD_ID = 0,
     // First device id available for dynamic devices
     END_RESERVED_ID = 1,
 };

 } // namespace android
	/*
	* Copyright (C) 2012 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 <android/sensor.h>
	#include <ftl/flags.h>
	#include <ftl/mixins.h>
	#include <input/Input.h>
	#include <input/KeyCharacterMap.h>
	#include <set>
	#include <unordered_map>
	#include <vector>

	#include <android/os/IInputConstants.h>

	namespace android {

	/*
	* Identifies a device.
	*/
	struct InputDeviceIdentifier {
	inline InputDeviceIdentifier() :
	bus(0), vendor(0), product(0), version(0) {
	}

	// Information provided by the kernel.
	std::string name;
	std::string location;
	std::string uniqueId;
	uint16_t bus;
	uint16_t vendor;
	uint16_t product;
	uint16_t version;

	// A composite input device descriptor string that uniquely identifies the device
	// even across reboots or reconnections. The value of this field is used by
	// upper layers of the input system to associate settings with individual devices.
	// It is hashed from whatever kernel provided information is available.
	// Ideally, the way this value is computed should not change between Android releases
	// because that would invalidate persistent settings that rely on it.
	std::string descriptor;

	// A value added to uniquely identify a device in the absence of a unique id. This
	// is intended to be a minimum way to distinguish from other active devices and may
	// reuse values that are not associated with an input anymore.
	uint16_t nonce;

	// The bluetooth address of the device, if known.
	std::optional<std::string> bluetoothAddress;

	/**
	* Return InputDeviceIdentifier.name that has been adjusted as follows:
	* - all characters besides alphanumerics, dash,
	* and underscore have been replaced with underscores.
	* This helps in situations where a file that matches the device name is needed,
	* while conforming to the filename limitations.
	*/
	std::string getCanonicalName() const;

	bool operator==(const InputDeviceIdentifier&) const = default;
	bool operator!=(const InputDeviceIdentifier&) const = default;
	};

	/**
	* Holds View related behaviors for an InputDevice.
	*/
	struct InputDeviceViewBehavior {
	/**
	* The smooth scroll behavior that applies for all source/axis, if defined by the device.
	* Empty optional if the device has not specified the default smooth scroll behavior.
	*/
	std::optional<bool> shouldSmoothScroll;
	};

	/* Types of input device sensors. Keep sync with core/java/android/hardware/Sensor.java */
	enum class InputDeviceSensorType : int32_t {
	ACCELEROMETER = ASENSOR_TYPE_ACCELEROMETER,
	MAGNETIC_FIELD = ASENSOR_TYPE_MAGNETIC_FIELD,
	ORIENTATION = 3,
	GYROSCOPE = ASENSOR_TYPE_GYROSCOPE,
	LIGHT = ASENSOR_TYPE_LIGHT,
	PRESSURE = ASENSOR_TYPE_PRESSURE,
	TEMPERATURE = 7,
	PROXIMITY = ASENSOR_TYPE_PROXIMITY,
	GRAVITY = ASENSOR_TYPE_GRAVITY,
	LINEAR_ACCELERATION = ASENSOR_TYPE_LINEAR_ACCELERATION,
	ROTATION_VECTOR = ASENSOR_TYPE_ROTATION_VECTOR,
	RELATIVE_HUMIDITY = ASENSOR_TYPE_RELATIVE_HUMIDITY,
	AMBIENT_TEMPERATURE = ASENSOR_TYPE_AMBIENT_TEMPERATURE,
	MAGNETIC_FIELD_UNCALIBRATED = ASENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED,
	GAME_ROTATION_VECTOR = ASENSOR_TYPE_GAME_ROTATION_VECTOR,
	GYROSCOPE_UNCALIBRATED = ASENSOR_TYPE_GYROSCOPE_UNCALIBRATED,
	SIGNIFICANT_MOTION = ASENSOR_TYPE_SIGNIFICANT_MOTION,

	ftl_first = ACCELEROMETER,
	ftl_last = SIGNIFICANT_MOTION
	};

	enum class InputDeviceSensorAccuracy : int32_t {
	ACCURACY_NONE = 0,
	ACCURACY_LOW = 1,
	ACCURACY_MEDIUM = 2,
	ACCURACY_HIGH = 3,
	};

	enum class InputDeviceSensorReportingMode : int32_t {
	CONTINUOUS = 0,
	ON_CHANGE = 1,
	ONE_SHOT = 2,
	SPECIAL_TRIGGER = 3,
	};

	enum class InputDeviceLightType : int32_t {
	INPUT = 0,
	PLAYER_ID = 1,
	KEYBOARD_BACKLIGHT = 2,

	ftl_last = KEYBOARD_BACKLIGHT
	};

	enum class InputDeviceLightCapability : uint32_t {
	/** Capability to change brightness of the light */
	BRIGHTNESS = 0x00000001,
	/** Capability to change color of the light */
	RGB = 0x00000002,
	};

	struct InputDeviceSensorInfo {
	explicit InputDeviceSensorInfo(std::string name, std::string vendor, int32_t version,
	InputDeviceSensorType type, InputDeviceSensorAccuracy accuracy,
	float maxRange, float resolution, float power, int32_t minDelay,
	int32_t fifoReservedEventCount, int32_t fifoMaxEventCount,
	std::string stringType, int32_t maxDelay, int32_t flags,
	int32_t id)
	: name(name),
	vendor(vendor),
	version(version),
	type(type),
	accuracy(accuracy),
	maxRange(maxRange),
	resolution(resolution),
	power(power),
	minDelay(minDelay),
	fifoReservedEventCount(fifoReservedEventCount),
	fifoMaxEventCount(fifoMaxEventCount),
	stringType(stringType),
	maxDelay(maxDelay),
	flags(flags),
	id(id) {}
	// Name string of the sensor.
	std::string name;
	// Vendor string of this sensor.
	std::string vendor;
	// Version of the sensor's module.
	int32_t version;
	// Generic type of this sensor.
	InputDeviceSensorType type;
	// The current accuracy of sensor event.
	InputDeviceSensorAccuracy accuracy;
	// Maximum range of the sensor in the sensor's unit.
	float maxRange;
	// Resolution of the sensor in the sensor's unit.
	float resolution;
	// The power in mA used by this sensor while in use.
	float power;
	// The minimum delay allowed between two events in microsecond or zero if this sensor only
	// returns a value when the data it's measuring changes.
	int32_t minDelay;
	// Number of events reserved for this sensor in the batch mode FIFO.
	int32_t fifoReservedEventCount;
	// Maximum number of events of this sensor that could be batched.
	int32_t fifoMaxEventCount;
	// The type of this sensor as a string.
	std::string stringType;
	// The delay between two sensor events corresponding to the lowest frequency that this sensor
	// supports.
	int32_t maxDelay;
	// Sensor flags
	int32_t flags;
	// Sensor id, same as the input device ID it belongs to.
	int32_t id;
	};

	struct BrightnessLevel : ftl::DefaultConstructible<BrightnessLevel, std::uint8_t>,
	ftl::Equatable<BrightnessLevel>,
	ftl::Orderable<BrightnessLevel>,
	ftl::Addable<BrightnessLevel> {
	using DefaultConstructible::DefaultConstructible;
	};

	struct InputDeviceLightInfo {
	explicit InputDeviceLightInfo(std::string name, int32_t id, InputDeviceLightType type,
	ftl::Flags<InputDeviceLightCapability> capabilityFlags,
	int32_t ordinal,
	std::set<BrightnessLevel> preferredBrightnessLevels)
	: name(name),
	id(id),
	type(type),
	capabilityFlags(capabilityFlags),
	ordinal(ordinal),
	preferredBrightnessLevels(std::move(preferredBrightnessLevels)) {}
	// Name string of the light.
	std::string name;
	// Light id
	int32_t id;
	// Type of the light.
	InputDeviceLightType type;
	// Light capabilities.
	ftl::Flags<InputDeviceLightCapability> capabilityFlags;
	// Ordinal of the light
	int32_t ordinal;
	// Custom brightness levels for the light
	std::set<BrightnessLevel> preferredBrightnessLevels;
	};

	struct InputDeviceBatteryInfo {
	explicit InputDeviceBatteryInfo(std::string name, int32_t id) : name(name), id(id) {}
	// Name string of the battery.
	std::string name;
	// Battery id
	int32_t id;
	};

	struct KeyboardLayoutInfo {
	explicit KeyboardLayoutInfo(std::string languageTag, std::string layoutType)
	: languageTag(languageTag), layoutType(layoutType) {}

	// A BCP 47 conformant language tag such as "en-US".
	std::string languageTag;
	// The layout type such as QWERTY or AZERTY.
	std::string layoutType;

	inline bool operator==(const KeyboardLayoutInfo& other) const {
	return languageTag == other.languageTag && layoutType == other.layoutType;
	}
	inline bool operator!=(const KeyboardLayoutInfo& other) const { return !(*this == other); }
	};

	// The version of the Universal Stylus Initiative (USI) protocol supported by the input device.
	struct InputDeviceUsiVersion {
	int32_t majorVersion = -1;
	int32_t minorVersion = -1;
	};

	/*
	* Describes the characteristics and capabilities of an input device.
	*/
	class InputDeviceInfo {
	public:
	InputDeviceInfo();
	InputDeviceInfo(const InputDeviceInfo& other);
	~InputDeviceInfo();

	struct MotionRange {
	int32_t axis;
	uint32_t source;
	float min;
	float max;
	float flat;
	float fuzz;
	float resolution;
	};

	void initialize(int32_t id, int32_t generation, int32_t controllerNumber,
	const InputDeviceIdentifier& identifier, const std::string& alias,
	bool isExternal, bool hasMic, int32_t associatedDisplayId,
	InputDeviceViewBehavior viewBehavior = {{}});

	inline int32_t getId() const { return mId; }
	inline int32_t getControllerNumber() const { return mControllerNumber; }
	inline int32_t getGeneration() const { return mGeneration; }
	inline const InputDeviceIdentifier& getIdentifier() const { return mIdentifier; }
	inline const std::string& getAlias() const { return mAlias; }
	inline const std::string& getDisplayName() const {
	return mAlias.empty() ? mIdentifier.name : mAlias;
	}
	inline bool isExternal() const { return mIsExternal; }
	inline bool hasMic() const { return mHasMic; }
	inline uint32_t getSources() const { return mSources; }

	const MotionRange* getMotionRange(int32_t axis, uint32_t source) const;

	void addSource(uint32_t source);
	void addMotionRange(int32_t axis, uint32_t source,
	float min, float max, float flat, float fuzz, float resolution);
	void addMotionRange(const MotionRange& range);
	void addSensorInfo(const InputDeviceSensorInfo& info);
	void addBatteryInfo(const InputDeviceBatteryInfo& info);
	void addLightInfo(const InputDeviceLightInfo& info);

	void setKeyboardType(int32_t keyboardType);
	inline int32_t getKeyboardType() const { return mKeyboardType; }

	void setKeyboardLayoutInfo(KeyboardLayoutInfo keyboardLayoutInfo);
	inline const std::optional<KeyboardLayoutInfo>& getKeyboardLayoutInfo() const {
	return mKeyboardLayoutInfo;
	}

	inline const InputDeviceViewBehavior& getViewBehavior() const { return mViewBehavior; }

	inline void setKeyCharacterMap(const std::shared_ptr<KeyCharacterMap> value) {
	mKeyCharacterMap = value;
	}

	inline const std::shared_ptr<KeyCharacterMap> getKeyCharacterMap() const {
	return mKeyCharacterMap;
	}

	inline void setVibrator(bool hasVibrator) { mHasVibrator = hasVibrator; }
	inline bool hasVibrator() const { return mHasVibrator; }

	inline void setHasBattery(bool hasBattery) { mHasBattery = hasBattery; }
	inline bool hasBattery() const { return mHasBattery; }

	inline void setButtonUnderPad(bool hasButton) { mHasButtonUnderPad = hasButton; }
	inline bool hasButtonUnderPad() const { return mHasButtonUnderPad; }

	inline void setHasSensor(bool hasSensor) { mHasSensor = hasSensor; }
	inline bool hasSensor() const { return mHasSensor; }

	inline const std::vector<MotionRange>& getMotionRanges() const {
	return mMotionRanges;
	}

	std::vector<InputDeviceSensorInfo> getSensors();

	std::vector<InputDeviceLightInfo> getLights();

	inline void setUsiVersion(std::optional<InputDeviceUsiVersion> usiVersion) {
	mUsiVersion = std::move(usiVersion);
	}
	inline std::optional<InputDeviceUsiVersion> getUsiVersion() const { return mUsiVersion; }

	inline int32_t getAssociatedDisplayId() const { return mAssociatedDisplayId; }

	private:
	int32_t mId;
	int32_t mGeneration;
	int32_t mControllerNumber;
	InputDeviceIdentifier mIdentifier;
	std::string mAlias;
	bool mIsExternal;
	bool mHasMic;
	std::optional<KeyboardLayoutInfo> mKeyboardLayoutInfo;
	uint32_t mSources;
	int32_t mKeyboardType;
	std::shared_ptr<KeyCharacterMap> mKeyCharacterMap;
	std::optional<InputDeviceUsiVersion> mUsiVersion;
	int32_t mAssociatedDisplayId;

	bool mHasVibrator;
	bool mHasBattery;
	bool mHasButtonUnderPad;
	bool mHasSensor;

	std::vector<MotionRange> mMotionRanges;
	std::unordered_map<InputDeviceSensorType, InputDeviceSensorInfo> mSensors;
	/* Map from light ID to light info */
	std::unordered_map<int32_t, InputDeviceLightInfo> mLights;
	/* Map from battery ID to battery info */
	std::unordered_map<int32_t, InputDeviceBatteryInfo> mBatteries;
	/** The View related behaviors for the device. */
	InputDeviceViewBehavior mViewBehavior;
	};

	/* Types of input device configuration files. */
	enum class InputDeviceConfigurationFileType : int32_t {
	CONFIGURATION = 0, /* .idc file */
	KEY_LAYOUT = 1, /* .kl file */
	KEY_CHARACTER_MAP = 2, /* .kcm file */
	};

	/*
	* Gets the path of an input device configuration file, if one is available.
	* Considers both system provided and user installed configuration files.
	* The optional suffix is appended to the end of the file name (before the
	* extension).
	*
	* The device identifier is used to construct several default configuration file
	* names to try based on the device name, vendor, product, and version.
	*
	* Returns an empty string if not found.
	*/
	extern std::string getInputDeviceConfigurationFilePathByDeviceIdentifier(
	const InputDeviceIdentifier& deviceIdentifier, InputDeviceConfigurationFileType type,
	const char* suffix = "");

	/*
	* Gets the path of an input device configuration file, if one is available.
	* Considers both system provided and user installed configuration files.
	*
	* The name is case-sensitive and is used to construct the filename to resolve.
	* All characters except 'a'-'z', 'A'-'Z', '0'-'9', '-', and '_' are replaced by underscores.
	*
	* Returns an empty string if not found.
	*/
	extern std::string getInputDeviceConfigurationFilePathByName(
	const std::string& name, InputDeviceConfigurationFileType type);

	enum ReservedInputDeviceId : int32_t {
	// Device id representing an invalid device
	INVALID_INPUT_DEVICE_ID = android::os::IInputConstants::INVALID_INPUT_DEVICE_ID,
	// Device id of a special "virtual" keyboard that is always present.
	VIRTUAL_KEYBOARD_ID = -1,
	// Device id of the "built-in" keyboard if there is one.
	BUILT_IN_KEYBOARD_ID = 0,
	// First device id available for dynamic devices
	END_RESERVED_ID = 1,
	};

	} // namespace android