git.iko.soy/unity8
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unity8/plugins/Unity/InputInfo/linux/qinputdeviceinfo_linux.cpp
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1/****************************************************************************
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3** Copyright (C) 2014 Canonical, Ltd. and/or its subsidiary(-ies).
4** Contact: http://www.qt-project.org/legal
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40****************************************************************************/
42#include "qinputdeviceinfo_linux_p.h"
44#include <libudev.h>
45#include <libevdev/libevdev.h>
46#include <fcntl.h>
47#include <unistd.h>
48#include <QDebug>
49#include <QSocketNotifier>
50#include <QTimer>
51#include <QDir>
53QInputDeviceManagerPrivate::QInputDeviceManagerPrivate(QObject *parent) :
54 QObject(parent),
55 currentFilter(QInputDevice::Unknown),
56 udevMonitor(0),
57 udevice(0)
59 QTimer::singleShot(250,this,SLOT(init()));
62QInputDeviceManagerPrivate::~QInputDeviceManagerPrivate()
64 udev_unref(udevice);
65 udev_monitor_unref(udevMonitor);
68void QInputDeviceManagerPrivate::init()
70 if (!udevice)
71 udevice = udev_new();
73 udev_list_entry *devices;
74 udev_list_entry *dev_list_entry;
75 udev_device *dev;
77 QString subsystem = QStringLiteral("input");
78 struct udev_enumerate *enumerate = 0;
80 if (udevice) {
82 udevMonitor = udev_monitor_new_from_netlink(udevice, "udev");
83 udev_monitor_filter_add_match_subsystem_devtype(udevMonitor, subsystem.toLatin1(), NULL);
84 enumerate = udev_enumerate_new(udevice);
85 udev_enumerate_add_match_subsystem(enumerate, subsystem.toLatin1());
87 udev_monitor_enable_receiving(udevMonitor);
88 int notifierFd = udev_monitor_get_fd(udevMonitor);
90 QSocketNotifier *notifier = new QSocketNotifier(notifierFd, QSocketNotifier::Read, this);
91 connect(notifier, SIGNAL(activated(int)), this, SLOT(onUDevChanges()));
93 udev_enumerate_scan_devices(enumerate);
94 devices = udev_enumerate_get_list_entry(enumerate);
96 udev_list_entry_foreach(dev_list_entry, devices) {
97 const char *path;
98 path = udev_list_entry_get_name(dev_list_entry);
100 dev = udev_device_new_from_syspath(udevice, path);
101 if (qstrcmp(udev_device_get_subsystem(dev), "input") == 0 ) {
102 QInputDevice *iDevice = addDevice(dev);
103 if (iDevice && !iDevice->devicePath().isEmpty()) {
104 deviceMap.insert(iDevice->devicePath(),iDevice);
105 }
106 }
107 udev_device_unref(dev);
108 }
109 udev_enumerate_unref(enumerate);
110 }
111 // udev_unref(udevice);
112 Q_FOREACH (const QString &devicePath, deviceMap.keys()) {
113 Q_EMIT deviceAdded(devicePath);
114 }
115 Q_EMIT ready();
118QInputDevice::InputTypeFlags QInputDeviceManagerPrivate::getInputTypeFlags(struct udev_device *dev)
120 QInputDevice::InputTypeFlags flags = QInputDevice::Unknown;
121 if (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_KEY"), "1") == 0 ) {
122 flags |= QInputDevice::Button;
123 }
124 if (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_MOUSE"), "1") == 0) {
125 flags |= QInputDevice::Mouse;
126 }
127 if (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_TOUCHPAD"), "1") == 0) {
128 flags |= QInputDevice::TouchPad;
129 }
130 if (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_TOUCHSCREEN"), "1") == 0
131 || qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_TABLET"), "1") == 0) {
132 flags |= QInputDevice::TouchScreen;
133 }
134 if (qstrcmp(udev_device_get_property_value(dev, "ID_INPUT_KEYBOARD"), "1") == 0 ) {
135 flags |= QInputDevice::Keyboard;
136 }
137 if (!QString::fromLatin1(udev_device_get_property_value(dev, "SW")).isEmpty()) {
138 flags |= QInputDevice::Switch;
139 }
141 return flags;
144QInputDevice *QInputDeviceManagerPrivate::addDevice(struct udev_device *udev)
146 QString eventPath = QString::fromLatin1(udev_device_get_sysname(udev));
148 if (eventPath.contains(QStringLiteral("event")))
149 eventPath.prepend(QStringLiteral("/dev/input/"));
151 if (deviceMap.contains(eventPath)) {
152 return Q_NULLPTR;
153 }
154 struct libevdev *dev = NULL;
155 int fd;
156 int rc = 1;
157 QInputDevice *inputDevice;
158 inputDevice = addUdevDevice(udev);
159 if (!inputDevice) {
160 return Q_NULLPTR;
161 }
162 eventPath = inputDevice->devicePath();
164 qDebug() << "Input device added:" << inputDevice->name() << inputDevice->devicePath() << inputDevice->type();
166 fd = open(eventPath.toLatin1(), O_RDONLY|O_NONBLOCK);
167 if (fd == -1) {
168 return inputDevice;
169 }
170 rc = libevdev_new_from_fd(fd, &dev);
171 if (rc < 0) {
172 qWarning() << "Failed to init libevdev ("<< strerror(-rc) << ")";
173 close(fd);
174 return Q_NULLPTR;
175 }
177 for (int i = 0; i < EV_MAX; i++) {
178 if (i == EV_KEY || i == EV_SW || i == EV_REL
179 || i == EV_REL || i == EV_ABS) {
180 for (int j = 0; j < libevdev_event_type_get_max(i); j++) {
181 if (libevdev_has_event_code(dev, i, j)) {
182 switch (i) {
183 case EV_KEY:
184 inputDevice->addButton(j);
185 break;
186 case EV_SW:
187 inputDevice->addSwitch(j);
188 break;
189 case EV_REL:
190 inputDevice->addRelativeAxis(j);
191 break;
192 case EV_ABS:
193 inputDevice->addAbsoluteAxis(j);
194 break;
195 };
196 }
197 }
198 }
199 }
201 libevdev_free(dev);
202 close(fd);
203 return inputDevice;
206void QInputDeviceManagerPrivate::addDetails(struct udev_device *)
210void QInputDeviceManagerPrivate::removeDevice(const QString &path)
212 // this path is not a full evdev path
213 Q_FOREACH (const QString devicePath, deviceMap.keys()) {
214 if (devicePath.contains(path)) {
215 qDebug() << "Input device removed:" << deviceMap.value(devicePath)->name() << devicePath << deviceMap.value(devicePath)->type();
216 deviceMap.remove(devicePath);
217 Q_EMIT deviceRemoved(devicePath);
218 }
219 }
222QInputDevice *QInputDeviceManagerPrivate::addUdevDevice(struct udev_device *udev)
224 QInputDevice *iDevice;
226 struct udev_list_entry *list;
227 struct udev_list_entry *node;
229 list = udev_device_get_properties_list_entry (udev);
230 QString syspath = QString::fromLatin1(udev_device_get_syspath(udev));
231 QDir sysdir(syspath);
233 QStringList infoList = sysdir.entryList(QStringList() << QStringLiteral("event*"),QDir::Dirs);
235 if (infoList.count() > 0) {
236 QString token = infoList.at(0);
238 token.prepend(QStringLiteral("/dev/input/"));
239 iDevice = new QInputDevice(this);
240 iDevice->setDevicePath(token);
241 } else {
242 return Q_NULLPTR;
243 }
244 udev_list_entry_foreach (node, list) {
246 QString key = QString::fromLatin1(udev_list_entry_get_name(node));
247 QString value = QString::fromLatin1(udev_list_entry_get_value(node));
249 if (key == QStringLiteral("NAME")) {
250 iDevice->setName(value.remove(QStringLiteral("\"")));
251 }
252 }
253 iDevice->setType(getInputTypeFlags(udev));
254 return iDevice;
257void QInputDeviceManagerPrivate::onUDevChanges()
259 if (!udevMonitor)
260 return;
262 udev_device *dev = udev_monitor_receive_device(udevMonitor);
264 if (dev) {
265 if (qstrcmp(udev_device_get_subsystem(dev), "input") == 0 ) {
266 QString eventPath = QString::fromLatin1(udev_device_get_sysname(dev));
268 QString action = QString::fromStdString(udev_device_get_action(dev));
270 if (!eventPath.contains(QStringLiteral("/dev/input/")))
271 eventPath.prepend(QStringLiteral("/dev/input/"));
273 if (action == QStringLiteral("add")) {
274 if (deviceMap.contains(eventPath)){
275 udev_device_unref(dev);
276 return;
277 }
279 QInputDevice *iDevice = addDevice(dev);
280 if (!iDevice) {
281 delete iDevice;
282 return;
283 }
284 iDevice->setType(getInputTypeFlags(dev));
285 udev_device_unref(dev);
287 deviceMap.insert(eventPath,iDevice);
289 Q_EMIT deviceAdded(eventPath);
291 } else if (action == QStringLiteral("remove")) {
292 removeDevice(eventPath);
293 }
294 }
295 }