logiops/src/logid/InputDevice.cpp

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/*
* Copyright 2019-2020 PixlOne
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <system_error>
#include <utility>
#include "InputDevice.h"
extern "C"
{
#include <libevdev/libevdev.h>
#include <libevdev/libevdev-uinput.h>
};
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using namespace logid;
InputDevice::InvalidEventCode::InvalidEventCode(std::string name)
{
_what = "Invalid event code " + name;
}
const char* InputDevice::InvalidEventCode::what() const noexcept
{
return _what.c_str();
}
InputDevice::InputDevice(const char* name)
{
device = libevdev_new();
libevdev_set_name(device, name);
///TODO: Is it really a good idea to enable all events?
libevdev_enable_event_type(device, EV_KEY);
for(int i = 0; i < KEY_CNT; i++)
libevdev_enable_event_code(device, EV_KEY, i, nullptr);
libevdev_enable_event_type(device, EV_REL);
for(int i = 0; i < REL_CNT; i++)
libevdev_enable_event_code(device, EV_REL, i, nullptr);
int err = libevdev_uinput_create_from_device(device,
LIBEVDEV_UINPUT_OPEN_MANAGED, &ui_device);
if(err != 0)
throw std::system_error(-err, std::generic_category());
}
InputDevice::~InputDevice()
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{
libevdev_uinput_destroy(ui_device);
libevdev_free(device);
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}
void InputDevice::moveAxis(uint axis, int movement)
{
_sendEvent(EV_REL, axis, movement);
}
void InputDevice::pressKey(uint code)
{
_sendEvent(EV_KEY, code, 1);
}
void InputDevice::releaseKey(uint code)
{
_sendEvent(EV_KEY, code, 0);
}
uint InputDevice::toKeyCode(std::string name)
{
return _toEventCode(EV_KEY, std::move(name));
}
uint InputDevice::toAxisCode(std::string name)
{
return _toEventCode(EV_KEY, std::move(name));
}
uint InputDevice::_toEventCode(uint type, const std::string& name)
{
int code = libevdev_event_code_from_name(type, name.c_str());
if(code == -1)
throw InvalidEventCode(name);
return code;
}
void InputDevice::_sendEvent(uint type, uint code, int value)
{
libevdev_uinput_write_event(ui_device, type, code, value);
libevdev_uinput_write_event(ui_device, EV_SYN, SYN_REPORT, 0);
}