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/*
* LinuxInputDeviceFunctions.cpp - implementation of LinuxInputDeviceFunctions class
*
* Copyright (c) 2017-2025 Tobias Junghans <tobydox@veyon.io>
*
* This file is part of Veyon - https://veyon.io
*
* 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 2 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#include "PlatformServiceFunctions.h"
#include "LinuxInputDeviceFunctions.h"
#include "LinuxKeyboardShortcutTrapper.h"
#include <X11/XKBlib.h>
void LinuxInputDeviceFunctions::enableInputDevices()
{
if( m_inputDevicesDisabled )
{
restoreKeyMapTable();
m_inputDevicesDisabled = false;
}
}
void LinuxInputDeviceFunctions::disableInputDevices()
{
if( m_inputDevicesDisabled == false )
{
setEmptyKeyMapTable();
m_inputDevicesDisabled = true;
}
}
KeyboardShortcutTrapper* LinuxInputDeviceFunctions::createKeyboardShortcutTrapper( QObject* parent )
{
return new LinuxKeyboardShortcutTrapper( parent );
}
void LinuxInputDeviceFunctions::setEmptyKeyMapTable()
{
if( m_origKeyTable )
{
XFree( m_origKeyTable );
}
auto display = XOpenDisplay( nullptr );
XDisplayKeycodes( display, &m_keyCodeMin, &m_keyCodeMax );
m_keyCodeCount = m_keyCodeMax - m_keyCodeMin;
m_origKeyTable = XGetKeyboardMapping( display, ::KeyCode( m_keyCodeMin ), m_keyCodeCount, &m_keySymsPerKeyCode );
auto newKeyTable = XGetKeyboardMapping( display, ::KeyCode( m_keyCodeMin ), m_keyCodeCount, &m_keySymsPerKeyCode );
for( int i = 0; i < m_keyCodeCount * m_keySymsPerKeyCode; i++ )
{
newKeyTable[i] = 0;
}
XChangeKeyboardMapping( display, m_keyCodeMin, m_keySymsPerKeyCode, newKeyTable, m_keyCodeCount );
XFlush( display );
XFree( newKeyTable );
XCloseDisplay( display );
}
void LinuxInputDeviceFunctions::restoreKeyMapTable()
{
Display* display = XOpenDisplay( nullptr );
XChangeKeyboardMapping( display, m_keyCodeMin, m_keySymsPerKeyCode,
static_cast<::KeySym *>( m_origKeyTable ), m_keyCodeCount );
XFlush( display );
XCloseDisplay( display );
XFree( m_origKeyTable );
m_origKeyTable = nullptr;
}
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