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/*
* Copyright (C) 2011 Canonical, Ltd.
*
* Authors:
* Michał Sawicz <michal.sawicz@canonical.com>
*
* 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; version 3.
*
* 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/>.
*/
// Self
#include "keymonitor.h"
// Qt
#include <QSocketNotifier>
#include <QDebug>
// X11
#include <X11/Xlib.h>
#include <X11/keysym.h>
// Local
#include <debug_p.h>
#define INVALID_EVENT_TYPE -1
static int key_press_type = INVALID_EVENT_TYPE;
static int notify_type = INVALID_EVENT_TYPE;
KeyMonitor::KeyMonitor(QObject* parent)
: QObject(parent)
{
if (this->registerEvents()) {
getModifiers();
}
}
KeyMonitor::~KeyMonitor()
{
m_eventList.clear();
XCloseDisplay(m_display);
}
KeyMonitor* KeyMonitor::instance()
{
static KeyMonitor* monitor = new KeyMonitor();
return monitor;
}
void KeyMonitor::getModifiers()
{
if(!m_modList.empty()) {
m_modList.clear();
}
XModifierKeymap *xmodmap = XGetModifierMapping(m_display);
// 8 is for Shift, Lock, Control, Mod1, Mod2, Mod3, Mod4, and Mod5
for (int i=0; i<8*xmodmap->max_keypermod; i++) {
if (xmodmap->modifiermap[i] > 0 && !m_modList.contains(xmodmap->modifiermap[i])) {
m_modList.append(xmodmap->modifiermap[i]);
}
}
XFreeModifiermap(xmodmap);
}
bool KeyMonitor::registerEvents()
{
unsigned long screen;
Window window;
XDeviceInfo *devices;
int x11FileDescriptor;
int num_devices;
int i, j;
XDevice *device;
XInputClassInfo *info;
XEventClass event_class;
m_display = XOpenDisplay(NULL);
screen = DefaultScreen(m_display);
window = RootWindow(m_display, screen);
devices = XListInputDevices(m_display, &num_devices);
for(i=0; i<num_devices; i++) {
device = XOpenDevice(m_display, devices[i].id);
if (device == NULL) {
/* That's not critical since "Virtual core..." devices don't
allow opening. */
UQ_DEBUG << "Could not open device: " << devices[i].name;
continue;
}
if (devices[i].use == IsXExtensionKeyboard) {
for (info=device->classes, j=0; j < device->num_classes; j++, info++) {
if (info->input_class == KeyClass) {
DeviceKeyPress(device, key_press_type, event_class);
m_eventList.append(event_class);
DeviceMappingNotify(device, notify_type, event_class);
m_eventList.append(event_class);
}
}
}
XCloseDevice(m_display, device);
}
XFreeDeviceList(devices);
if (m_eventList.size() == 0) {
UQ_WARNING << "No input devices found.";
return false;
}
if (XSelectExtensionEvent(m_display, window, m_eventList.data(), m_eventList.size())) {
UQ_WARNING << "Error selecting events.";
return false;
}
/* Dispatch XEvents when there is activity on the X11 file descriptor */
x11FileDescriptor = ConnectionNumber(m_display);
QSocketNotifier* socketNotifier = new QSocketNotifier(x11FileDescriptor, QSocketNotifier::Read, this);
connect(socketNotifier, SIGNAL(activated(int)), this, SLOT(x11EventDispatch()));
return true;
}
void KeyMonitor::x11EventDispatch()
{
XEvent event;
while (XPending(m_display) > 0) {
XNextEvent(m_display, &event);
if (event.type == key_press_type) {
XDeviceKeyEvent *keyEvent = (XDeviceKeyEvent *) &event;
if (!m_modList.contains((KeyCode) keyEvent->keycode)) {
// if not a modifier
Q_EMIT keyPressed();
}
}
else if (event.type == notify_type) {
getModifiers();
}
}
}
#include "keymonitor.moc"
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