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capslock_unix.cpp
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capslock_unix.cpp
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/* capslock_unix.cpp - Helper to check whether Caps Lock is on
* Copyright (C) 2021 g10 Code GmbH
*
* Software engineering by Ingo Klöcker <dev@ingo-kloecker.de>
*
* 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; if not, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: GPL-2.0+
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "capslock.h"
#include "capslock_p.h"
#ifdef PINENTRY_QT_WAYLAND
# include <KWayland/Client/connection_thread.h>
# include <KWayland/Client/keyboard.h>
# include <KWayland/Client/registry.h>
# include <KWayland/Client/seat.h>
#endif
#include <QGuiApplication>
#ifdef PINENTRY_QT_X11
# include <QX11Info>
# include <X11/XKBlib.h>
# undef Status
#endif
#include <QDebug>
#ifdef PINENTRY_QT_WAYLAND
using namespace KWayland::Client;
#endif
#ifdef PINENTRY_QT_WAYLAND
static bool watchingWayland = false;
#endif
LockState capsLockState()
{
static bool reportUnsupportedPlatform = true;
#ifdef PINENTRY_QT_X11
if (qApp->platformName() == QLatin1String("xcb")) {
unsigned int state;
XkbGetIndicatorState(QX11Info::display(), XkbUseCoreKbd, &state);
return (state & 0x01) == 1 ? LockState::On : LockState::Off;
}
#endif
#ifdef PINENTRY_QT_WAYLAND
if (qApp->platformName() == QLatin1String("wayland")) {
if (!watchingWayland && reportUnsupportedPlatform) {
qDebug() << "Use CapsLockWatcher for checking for Caps Lock on Wayland";
}
} else
#endif
if (reportUnsupportedPlatform) {
qWarning() << "Checking for Caps Lock not possible on unsupported platform:" << qApp->platformName();
}
reportUnsupportedPlatform = false;
return LockState::Unknown;
}
#ifdef PINENTRY_QT_WAYLAND
void CapsLockWatcher::Private::watchWayland()
{
watchingWayland = true;
auto connection = ConnectionThread::fromApplication(q);
if (!connection) {
qWarning() << "Failed to get connection to Wayland server from QPA";
return;
}
registry = new Registry{q};
registry->create(connection);
if (!registry->isValid()) {
qWarning() << "Failed to create valid KWayland registry";
return;
}
registry->setup();
connect(registry, &Registry::seatAnnounced,
q, [this] (quint32 name, quint32 version) { registry_seatAnnounced(name, version); });
}
void CapsLockWatcher::Private::registry_seatAnnounced(quint32 name, quint32 version)
{
Q_ASSERT(registry);
seat = registry->createSeat(name, version, q);
if (!seat->isValid()) {
qWarning() << "Failed to create valid KWayland seat";
return;
}
connect(seat, &Seat::hasKeyboardChanged,
q, [this] (bool hasKeyboard) { seat_hasKeyboardChanged(hasKeyboard); });
}
void CapsLockWatcher::Private::seat_hasKeyboardChanged(bool hasKeyboard)
{
Q_ASSERT(seat);
if (!hasKeyboard) {
qDebug() << "Seat has no keyboard";
return;
}
auto keyboard = seat->createKeyboard(q);
if (!keyboard->isValid()) {
qWarning() << "Failed to create valid KWayland keyboard";
return;
}
connect(keyboard, &Keyboard::modifiersChanged,
q, [this] (quint32, quint32, quint32 locked, quint32) { keyboard_modifiersChanged(locked); });
}
void CapsLockWatcher::Private::keyboard_modifiersChanged(quint32 locked)
{
const bool capsLockIsLocked = (locked & 2u) != 0;
qDebug() << "Caps Lock is locked:" << capsLockIsLocked;
Q_EMIT q->stateChanged(capsLockIsLocked);
}
#endif

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