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/*
* Copyright (C) 2015 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.
*/
#ifndef ANDROID_INPUT_DEVICE_H_
#define ANDROID_INPUT_DEVICE_H_
#include <memory>
#include <vector>
#include <utils/Timers.h>
#include "InputMapper.h"
struct input_device_handle;
struct input_device_identifier;
namespace android {
class InputDeviceDefinition;
class InputDeviceNode;
class InputHostInterface;
struct InputEvent;
using InputDeviceHandle = struct input_device_handle;
using InputDeviceIdentifier = struct input_device_identifier;
/**
* InputDeviceInterface represents an input device in the HAL. It processes
* input events before passing them to the input host.
*/
class InputDeviceInterface {
public:
virtual void processInput(InputEvent& event, nsecs_t currentTime) = 0;
virtual uint32_t getInputClasses() = 0;
protected:
InputDeviceInterface() = default;
virtual ~InputDeviceInterface() = default;
};
/**
* EvdevDevice is an input device backed by a Linux evdev node.
*/
class EvdevDevice : public InputDeviceInterface {
public:
EvdevDevice(InputHostInterface* host, const std::shared_ptr<InputDeviceNode>& node);
virtual ~EvdevDevice() override = default;
virtual void processInput(InputEvent& event, nsecs_t currentTime) override;
virtual uint32_t getInputClasses() override { return mClasses; }
private:
void createMappers();
void configureDevice();
InputHostInterface* mHost = nullptr;
std::shared_ptr<InputDeviceNode> mDeviceNode;
InputDeviceIdentifier* mInputId = nullptr;
InputDeviceDefinition* mDeviceDefinition = nullptr;
InputDeviceHandle* mDeviceHandle = nullptr;
std::vector<std::unique_ptr<InputMapper>> mMappers;
uint32_t mClasses = 0;
};
/* Input device classes. */
enum {
/* The input device is a keyboard or has buttons. */
INPUT_DEVICE_CLASS_KEYBOARD = 0x00000001,
/* The input device is an alpha-numeric keyboard (not just a dial pad). */
INPUT_DEVICE_CLASS_ALPHAKEY = 0x00000002,
/* The input device is a touchscreen or a touchpad (either single-touch or multi-touch). */
INPUT_DEVICE_CLASS_TOUCH = 0x00000004,
/* The input device is a cursor device such as a trackball or mouse. */
INPUT_DEVICE_CLASS_CURSOR = 0x00000008,
/* The input device is a multi-touch touchscreen. */
INPUT_DEVICE_CLASS_TOUCH_MT = 0x00000010,
/* The input device is a directional pad (implies keyboard, has DPAD keys). */
INPUT_DEVICE_CLASS_DPAD = 0x00000020,
/* The input device is a gamepad (implies keyboard, has BUTTON keys). */
INPUT_DEVICE_CLASS_GAMEPAD = 0x00000040,
/* The input device has switches. */
INPUT_DEVICE_CLASS_SWITCH = 0x00000080,
/* The input device is a joystick (implies gamepad, has joystick absolute axes). */
INPUT_DEVICE_CLASS_JOYSTICK = 0x00000100,
/* The input device has a vibrator (supports FF_RUMBLE). */
INPUT_DEVICE_CLASS_VIBRATOR = 0x00000200,
/* The input device has a microphone. */
// TODO: remove this and let the host take care of it
INPUT_DEVICE_CLASS_MIC = 0x00000400,
/* The input device is an external stylus (has data we want to fuse with touch data). */
INPUT_DEVICE_CLASS_EXTERNAL_STYLUS = 0x00000800,
/* The input device is virtual (not a real device, not part of UI configuration). */
/* not used - INPUT_DEVICE_CLASS_VIRTUAL = 0x40000000, */
/* The input device is external (not built-in). */
// TODO: remove this and let the host take care of it?
INPUT_DEVICE_CLASS_EXTERNAL = 0x80000000,
};
} // namespace android
#endif // ANDROID_INPUT_DEVICE_H_
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