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172 lines
4.1 KiB
172 lines
4.1 KiB
/* |
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* Copyright 2019-2020 PixlOne |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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#include <system_error> |
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#include "InputDevice.h" |
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extern "C" |
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{ |
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#include <libevdev/libevdev.h> |
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#include <libevdev/libevdev-uinput.h> |
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} |
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using namespace logid; |
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InputDevice::InvalidEventCode::InvalidEventCode(const std::string& name) : |
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_what ("Invalid event code " + name) |
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{ |
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} |
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const char* InputDevice::InvalidEventCode::what() const noexcept |
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{ |
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return _what.c_str(); |
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} |
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InputDevice::InputDevice(const char* name) |
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{ |
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device = libevdev_new(); |
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libevdev_set_name(device, name); |
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libevdev_enable_event_type(device, EV_KEY); |
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for (unsigned int i = 0; i < KEY_CNT; i++) { |
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// Enable some keys which a normal keyboard should have |
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// by default, i.e. a-z, modifier keys and so on, see: |
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// /usr/include/linux/input-event-codes.h |
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if (i < 128) { |
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registered_keys[i] = true; |
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libevdev_enable_event_code(device, EV_KEY, i, nullptr); |
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} else { |
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registered_keys[i] = false; |
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} |
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} |
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libevdev_enable_event_type(device, EV_REL); |
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int err = libevdev_uinput_create_from_device(device, |
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LIBEVDEV_UINPUT_OPEN_MANAGED, &ui_device); |
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if(err != 0) { |
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libevdev_free(device); |
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throw std::system_error(-err, std::generic_category()); |
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} |
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} |
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InputDevice::~InputDevice() |
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{ |
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libevdev_uinput_destroy(ui_device); |
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libevdev_free(device); |
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} |
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void InputDevice::registerKey(uint code) |
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{ |
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// TODO: Maybe print error message, if wrong code is passed? |
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if(registered_keys[code] || code > KEY_CNT) { |
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return; |
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} |
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_enableEvent(EV_KEY, code); |
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registered_keys[code] = true; |
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} |
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void InputDevice::registerAxis(uint axis) |
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{ |
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// TODO: Maybe print error message, if wrong code is passed? |
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if(registered_axis[axis] || axis > REL_CNT) { |
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return; |
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} |
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_enableEvent(EV_REL, axis); |
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registered_axis[axis] = true; |
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} |
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void InputDevice::moveAxis(uint axis, int movement) |
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{ |
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_sendEvent(EV_REL, axis, movement); |
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} |
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void InputDevice::pressKey(uint code) |
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{ |
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_sendEvent(EV_KEY, code, 1); |
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} |
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void InputDevice::releaseKey(uint code) |
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{ |
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_sendEvent(EV_KEY, code, 0); |
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} |
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uint InputDevice::toKeyCode(const std::string& name) |
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{ |
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return _toEventCode(EV_KEY, name); |
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} |
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uint InputDevice::toAxisCode(const std::string& name) |
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{ |
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return _toEventCode(EV_REL, name); |
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} |
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/* Returns -1 if axis_code is not hi-res */ |
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int InputDevice::getLowResAxis(const uint axis_code) |
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{ |
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/* Some systems don't have these hi-res axes */ |
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#ifdef REL_WHEEL_HI_RES |
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if(axis_code == REL_WHEEL_HI_RES) |
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return REL_WHEEL; |
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#endif |
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#ifdef REL_HWHEEL_HI_RES |
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if(axis_code == REL_HWHEEL_HI_RES) |
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return REL_HWHEEL; |
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#endif |
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return -1; |
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} |
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uint InputDevice::_toEventCode(uint type, const std::string& name) |
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{ |
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int code = libevdev_event_code_from_name(type, name.c_str()); |
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if(code == -1) |
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throw InvalidEventCode(name); |
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return code; |
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} |
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void InputDevice::_enableEvent(const uint type, const uint code) |
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{ |
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libevdev_uinput_destroy(ui_device); |
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libevdev_enable_event_code(device, type, code, nullptr); |
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int err = libevdev_uinput_create_from_device(device, |
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LIBEVDEV_UINPUT_OPEN_MANAGED, &ui_device); |
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if(err != 0) { |
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libevdev_free(device); |
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device = nullptr; |
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ui_device = nullptr; |
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throw std::system_error(-err, std::generic_category()); |
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} |
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} |
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void InputDevice::_sendEvent(uint type, uint code, int value) |
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{ |
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libevdev_uinput_write_event(ui_device, type, code, value); |
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libevdev_uinput_write_event(ui_device, EV_SYN, SYN_REPORT, 0); |
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}
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