File indexing completed on 2025-09-14 05:27:46

 /*
     SPDX-FileCopyrightText: 2010 Andriy Rysin <rysin@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "xinput_helper.h"
 #include "debug.h"
 #include <config-keyboard.h>
 
 #include <QCoreApplication>
 #include <QDebug>
 #include <QTimer>
 #include <QtGui/private/qtx11extras_p.h>
 
 #include <X11/X.h>
 #include <X11/Xatom.h>
 
 #if HAVE_XINPUT
 #include <X11/extensions/XInput.h>
 #include <xcb/xproto.h>
 typedef struct xcb_input_device_presence_notify_event_t {
     uint8_t response_type;
     uint8_t pad0;
     uint16_t sequence;
     xcb_timestamp_t time;
     uint8_t devchange;
     uint8_t device_id;
     uint16_t control;
     uint8_t pad1[20];
 } xcb_input_device_presence_notify_event_t;
 // FIXME: #include <xcb/xinput.h> once xcb-xinput is stable
 #endif
 
 #include "udev_helper.h"
 
 static const int DEVICE_NONE = 0;
 static const int DEVICE_KEYBOARD = 1;
 static const int DEVICE_POINTER = 2;
 
 XInputEventNotifier::XInputEventNotifier(QWidget *parent)
     : XEventNotifier()
     , // TODO: destruct properly?
     xinputEventType(-1)
     , udevNotifier(nullptr)
     , keyboardNotificationTimer(new QTimer(this))
     , mouseNotificationTimer(new QTimer(this))
 {
     Q_UNUSED(parent)
 
     // Q_EMIT signal only once, even after X11 re-enables N keyboards after resuming from suspend
     keyboardNotificationTimer->setSingleShot(true);
     keyboardNotificationTimer->setInterval(500);
     connect(keyboardNotificationTimer, &QTimer::timeout, this, &XInputEventNotifier::newKeyboardDevice);
 
     // same for mouse
     mouseNotificationTimer->setSingleShot(true);
     mouseNotificationTimer->setInterval(500);
     connect(mouseNotificationTimer, &QTimer::timeout, this, &XInputEventNotifier::newPointerDevice);
 }
 
 void XInputEventNotifier::start()
 {
     if (QCoreApplication::instance() != nullptr) {
         registerForNewDeviceEvent(QX11Info::display());
     }
 
     XEventNotifier::start();
 }
 
 void XInputEventNotifier::stop()
 {
     XEventNotifier::stop();
 }
 
 bool XInputEventNotifier::processOtherEvents(xcb_generic_event_t *event)
 {
     int newDeviceType = getNewDeviceEventType(event);
     if (newDeviceType == DEVICE_KEYBOARD) {
         if (!keyboardNotificationTimer->isActive()) {
             keyboardNotificationTimer->start();
         }
     } else if (newDeviceType == DEVICE_POINTER) {
         if (!mouseNotificationTimer->isActive()) {
             mouseNotificationTimer->start();
         }
         // arghhh, looks like X resets xkb map even when only pointer device is connected
         if (!keyboardNotificationTimer->isActive()) {
             keyboardNotificationTimer->start();
         }
     }
     return true;
 }
 
 #if HAVE_XINPUT
 
 // This is ugly but allows to skip multiple execution of setxkbmap
 // for all keyboard devices that don't care about layouts
 static bool isRealKeyboard(const char *deviceName)
 {
     return strstr(deviceName, "Video Bus") == nullptr && strstr(deviceName, "Sleep Button") == nullptr && strstr(deviceName, "Power Button") == nullptr
         && strstr(deviceName, "WMI hotkeys") == nullptr && strstr(deviceName, "Camera") == nullptr;
 }
 
 int XInputEventNotifier::getNewDeviceEventType(xcb_generic_event_t *event)
 {
     int newDeviceType = DEVICE_NONE;
     if (xinputEventType != -1 && event->response_type == xinputEventType) {
         xcb_input_device_presence_notify_event_t *xdpne = reinterpret_cast<xcb_input_device_presence_notify_event_t *>(event);
         if (xdpne->devchange == DeviceEnabled) {
             int ndevices;
             XDeviceInfo *devices = XListInputDevices(display, &ndevices);
             if (devices != nullptr) {
                 qCDebug(KCM_KEYBOARD) << "New device id:" << xdpne->device_id;
                 for (int i = 0; i < ndevices; i++) {
                     qCDebug(KCM_KEYBOARD) << "id:" << devices[i].id << "name:" << devices[i].name << "used as:" << devices[i].use;
                     if (devices[i].id == xdpne->device_id) {
                         if (devices[i].use == IsXKeyboard || devices[i].use == IsXExtensionKeyboard) {
                             if (isRealKeyboard(devices[i].name)) {
                                 newDeviceType = DEVICE_KEYBOARD;
                                 qCDebug(KCM_KEYBOARD) << "new keyboard device, id:" << devices[i].id << "name:" << devices[i].name
                                                       << "used as:" << devices[i].use;
                                 break;
                             }
                         }
                         if (devices[i].use == IsXPointer || devices[i].use == IsXExtensionPointer) {
                             newDeviceType = DEVICE_POINTER;
                             qCDebug(KCM_KEYBOARD) << "new pointer device, id:" << devices[i].id << "name:" << devices[i].name << "used as:" << devices[i].use;
                             break;
                         }
                     }
                 }
                 XFreeDeviceList(devices);
             }
         }
     }
     return newDeviceType;
 }
 
 int XInputEventNotifier::registerForNewDeviceEvent(Display *display_)
 {
     int xitype;
     XEventClass xiclass;
     display = display_;
 
     DevicePresence(display, xitype, xiclass);
     XSelectExtensionEvent(display, DefaultRootWindow(display), &xiclass, 1);
     qCDebug(KCM_KEYBOARD) << "Registered for new device events from XInput, class" << xitype;
     xinputEventType = xitype;
     return xitype;
 }
 
 #elif defined(HAVE_UDEV)
 
 int XInputEventNotifier::registerForNewDeviceEvent(Display * /*display*/)
 {
     if (!udevNotifier) {
         udevNotifier = new UdevDeviceNotifier(this);
         connect(udevNotifier, &UdevDeviceNotifier::newKeyboardDevice, this, &XInputEventNotifier::newKeyboardDevice);
         connect(udevNotifier, &UdevDeviceNotifier::newPointerDevice, this, &XInputEventNotifier::newPointerDevice);
         // Same as with XInput notifier, also Q_EMIT newKeyboardDevice when pointer device is found
         connect(udevNotifier, &UdevDeviceNotifier::newPointerDevice, this, &XInputEventNotifier::newKeyboardDevice);
     }
 
     return -1;
 }
 
 int XInputEventNotifier::getNewDeviceEventType(xcb_generic_event_t * /*event*/)
 {
     return DEVICE_NONE;
 }
 
 #else
 
 #ifdef __GNUC__
 #warning "Keyboard daemon is compiled without XInput and UDev, keyboard settings will be reset when new keyboard device is plugged in!"
 #endif
 
 int XInputEventNotifier::registerForNewDeviceEvent(Display * /*display*/)
 {
     qCWarning(KCM_KEYBOARD) << "Keyboard kded daemon is compiled without XInput, xkb configuration will be reset when new keyboard device is plugged in!";
     return -1;
 }
 
 int XInputEventNotifier::getNewDeviceEventType(xcb_generic_event_t * /*event*/)
 {
     return DEVICE_NONE;
 }
 
 #endif