1	// Copyright (C) 2020 The Qt Company Ltd.
2	// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4	#include "qxcbconnection.h"
5	#include "qxcbkeyboard.h"
6	#include "qxcbscrollingdevice_p.h"
7	#include "qxcbscreen.h"
8	#include "qxcbwindow.h"
9	#include "QtCore/qmetaobject.h"
10	#include "QtCore/qmath.h"
11	#include <QtGui/qpointingdevice.h>
12	#include <QtGui/private/qpointingdevice_p.h>
13	#include <qpa/qwindowsysteminterface_p.h>
14	#include <QDebug>
15
16	#include <xcb/xinput.h>
17
18	#if QT_CONFIG(gestures)
19	#define QT_XCB_HAS_TOUCHPAD_GESTURES (XCB_INPUT_MINOR_VERSION >= 4)
20	#endif
21
22	using namespace Qt::StringLiterals;
23
24	using qt_xcb_input_device_event_t = xcb_input_button_press_event_t;
25	#if QT_XCB_HAS_TOUCHPAD_GESTURES
26	using qt_xcb_input_pinch_event_t = xcb_input_gesture_pinch_begin_event_t;
27	using qt_xcb_input_swipe_event_t = xcb_input_gesture_swipe_begin_event_t;
28	#endif
29
30	struct qt_xcb_input_event_mask_t {
31	xcb_input_event_mask_t header;
32	alignas(4) uint8_t mask[8] = {}; // up to 2 units of 4 bytes
33	};
34
35	static inline void setXcbMask(uint8_t* mask, int bit)
36	{
37	// note that XI protocol always uses little endian for masks over the wire
38	mask[bit >> 3] |= 1 << (bit & 7);
39	}
40
41	void QXcbConnection::xi2SelectStateEvents()
42	{
43	// These state events do not depend on a specific X window, but are global
44	// for the X client's (application's) state.
45	qt_xcb_input_event_mask_t xiEventMask;
46	xiEventMask.header.deviceid = XCB_INPUT_DEVICE_ALL;
47	xiEventMask.header.mask_len = 1;
48	setXcbMask(mask: xiEventMask.mask, XCB_INPUT_HIERARCHY);
49	setXcbMask(mask: xiEventMask.mask, XCB_INPUT_DEVICE_CHANGED);
50	setXcbMask(mask: xiEventMask.mask, XCB_INPUT_PROPERTY);
51	xcb_input_xi_select_events(c: xcb_connection(), window: rootWindow(), num_mask: 1, masks: &xiEventMask.header);
52	}
53
54	void QXcbConnection::xi2SelectDeviceEvents(xcb_window_t window)
55	{
56	if (window == rootWindow())
57	return;
58
59	qt_xcb_input_event_mask_t mask;
60
61	setXcbMask(mask: mask.mask, XCB_INPUT_BUTTON_PRESS);
62	setXcbMask(mask: mask.mask, XCB_INPUT_BUTTON_RELEASE);
63	setXcbMask(mask: mask.mask, XCB_INPUT_MOTION);
64	// There is a check for enter/leave events in plain xcb enter/leave event handler,
65	// core enter/leave events will be ignored in this case.
66	setXcbMask(mask: mask.mask, XCB_INPUT_ENTER);
67	setXcbMask(mask: mask.mask, XCB_INPUT_LEAVE);
68	if (isAtLeastXI22()) {
69	setXcbMask(mask: mask.mask, XCB_INPUT_TOUCH_BEGIN);
70	setXcbMask(mask: mask.mask, XCB_INPUT_TOUCH_UPDATE);
71	setXcbMask(mask: mask.mask, XCB_INPUT_TOUCH_END);
72	}
73	#if QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
74	if (isAtLeastXI24()) {
75	setXcbMask(mask: mask.mask, XCB_INPUT_GESTURE_PINCH_BEGIN);
76	setXcbMask(mask: mask.mask, XCB_INPUT_GESTURE_PINCH_UPDATE);
77	setXcbMask(mask: mask.mask, XCB_INPUT_GESTURE_PINCH_END);
78	setXcbMask(mask: mask.mask, XCB_INPUT_GESTURE_SWIPE_BEGIN);
79	setXcbMask(mask: mask.mask, XCB_INPUT_GESTURE_SWIPE_UPDATE);
80	setXcbMask(mask: mask.mask, XCB_INPUT_GESTURE_SWIPE_END);
81	}
82	#endif // QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
83
84	mask.header.deviceid = XCB_INPUT_DEVICE_ALL;
85	mask.header.mask_len = 2;
86	xcb_void_cookie_t cookie =
87	xcb_input_xi_select_events_checked(c: xcb_connection(), window, num_mask: 1, masks: &mask.header);
88	xcb_generic_error_t *error = xcb_request_check(c: xcb_connection(), cookie);
89	if (error) {
90	qCDebug(lcQpaXInput, "failed to select events, window %x, error code %d", window, error->error_code);
91	free(ptr: error);
92	} else {
93	QWindowSystemInterfacePrivate::TabletEvent::setPlatformSynthesizesMouse(false);
94	}
95	}
96
97	static inline qreal fixed3232ToReal(xcb_input_fp3232_t val)
98	{
99	return qreal(val.integral) + qreal(val.frac) / (1ULL << 32);
100	}
101
102	#if QT_CONFIG(tabletevent)
103	/*!
104	\internal
105	Find the existing QPointingDevice instance representing a particular tablet or stylus;
106	or create and register a new instance if it was not found.
107
108	An instance can be uniquely identified by its \a devType, \a pointerType and \a uniqueId.
109	The rest of the arguments are necessary to create a new instance.
110
111	If the instance represents a stylus, the instance representing the tablet
112	itself must be given as \a master. Otherwise, \a master must be the xinput
113	master device (core pointer) to which the tablet belongs. It should not be
114	null, because \a master is also the QObject::parent() for memory management.
115
116	Proximity events have incomplete information. So as a side effect, if an
117	existing instance is found, it is updated with the given \a usbId and
118	\a toolId, and the seat ID of \a master, in case those values were only
119	now discovered, or the seat assignment changed (?).
120	*/
121	static const QPointingDevice *tabletToolInstance(QPointingDevice *master, const QString &tabletName,
122	qint64 id, quint32 usbId, quint32 toolId, qint64 uniqueId,
123	QPointingDevice::PointerType pointerTypeOverride = QPointingDevice::PointerType::Unknown,
124	QPointingDevice::Capabilities capsOverride = QInputDevice::Capability::None)
125	{
126	QInputDevice::DeviceType devType = QInputDevice::DeviceType::Stylus;
127	QPointingDevice::PointerType pointerType = QPointingDevice::PointerType::Pen;
128	QPointingDevice::Capabilities caps = QInputDevice::Capability::Position |
129	QInputDevice::Capability::Pressure |
130	QInputDevice::Capability::MouseEmulation |
131	QInputDevice::Capability::Hover |
132	capsOverride;
133	int buttonCount = 3; // the tip, plus two barrel buttons
134	// keep in sync with wacom_intuos_inout() in Linux kernel driver wacom_wac.c
135	// TODO yeah really, there are many more now so this needs updating
136	switch (toolId) {
137	case 0xd12:
138	case 0x912:
139	case 0x112:
140	case 0x913: /* Intuos3 Airbrush */
141	case 0x902: /* Intuos4/5 13HD/24HD Airbrush */
142	case 0x100902: /* Intuos4/5 13HD/24HD Airbrush */
143	devType = QInputDevice::DeviceType::Airbrush;
144	caps.setFlag(flag: QInputDevice::Capability::XTilt);
145	caps.setFlag(flag: QInputDevice::Capability::YTilt);
146	caps.setFlag(flag: QInputDevice::Capability::TangentialPressure);
147	buttonCount = 2;
148	break;
149	case 0x91b: /* Intuos3 Airbrush Eraser */
150	case 0x90a: /* Intuos4/5 13HD/24HD Airbrush Eraser */
151	case 0x10090a: /* Intuos4/5 13HD/24HD Airbrush Eraser */
152	devType = QInputDevice::DeviceType::Airbrush;
153	pointerType = QPointingDevice::PointerType::Eraser;
154	caps.setFlag(flag: QInputDevice::Capability::XTilt);
155	caps.setFlag(flag: QInputDevice::Capability::YTilt);
156	caps.setFlag(flag: QInputDevice::Capability::TangentialPressure);
157	buttonCount = 2;
158	break;
159	case 0x007: /* Mouse 4D and 2D */
160	case 0x09c:
161	case 0x094:
162	// TODO set something to indicate a multi-dimensional capability:
163	// Capability::3D or 4D or QPointingDevice::setMaximumDimensions()?
164	devType = QInputDevice::DeviceType::Mouse;
165	buttonCount = 5; // TODO only if it's a 4D Mouse
166	break;
167	case 0x017: /* Intuos3 2D Mouse */
168	case 0x806: /* Intuos4 Mouse */
169	devType = QInputDevice::DeviceType::Mouse;
170	break;
171	case 0x096: /* Lens cursor */
172	case 0x097: /* Intuos3 Lens cursor */
173	case 0x006: /* Intuos4 Lens cursor */
174	devType = QInputDevice::DeviceType::Puck;
175	break;
176	case 0x885: /* Intuos3 Art Pen (Marker Pen) */
177	case 0x100804: /* Intuos4/5 13HD/24HD Art Pen */
178	caps.setFlag(flag: QInputDevice::Capability::XTilt);
179	caps.setFlag(flag: QInputDevice::Capability::YTilt);
180	caps.setFlag(flag: QInputDevice::Capability::Rotation);
181	buttonCount = 1;
182	break;
183	case 0x10080c: /* Intuos4/5 13HD/24HD Art Pen Eraser */
184	pointerType = QPointingDevice::PointerType::Eraser;
185	caps.setFlag(flag: QInputDevice::Capability::XTilt);
186	caps.setFlag(flag: QInputDevice::Capability::YTilt);
187	caps.setFlag(flag: QInputDevice::Capability::Rotation);
188	buttonCount = 1;
189	break;
190	case 0:
191	pointerType = QPointingDevice::PointerType::Unknown;
192	break;
193	}
194	if (pointerTypeOverride != QPointingDevice::PointerType::Unknown)
195	pointerType = pointerTypeOverride;
196	const QPointingDevice *ret = QPointingDevicePrivate::queryTabletDevice(deviceType: devType, pointerType,
197	uniqueId: QPointingDeviceUniqueId::fromNumericId(id: uniqueId),
198	capabilities: caps, systemId: id);
199	if (!ret) {
200	ret = new QPointingDevice(tabletName, id, devType, pointerType, caps, 1, buttonCount,
201	master ? master->seatName() : QString(),
202	QPointingDeviceUniqueId::fromNumericId(id: uniqueId), master);
203	QWindowSystemInterface::registerInputDevice(device: ret);
204	}
205	QPointingDevicePrivate *devPriv = QPointingDevicePrivate::get(q: const_cast<QPointingDevice *>(ret));
206	devPriv->busId = QString::number(usbId, base: 16);
207	devPriv->toolId = toolId;
208	if (master)
209	devPriv->seatName = master->seatName();
210	return ret;
211	}
212
213	static const char *toolName(QInputDevice::DeviceType tool) {
214	static const QMetaObject *metaObject = qt_getEnumMetaObject(tool);
215	static const QMetaEnum me = metaObject->enumerator(index: metaObject->indexOfEnumerator(name: qt_getEnumName(tool)));
216	return me.valueToKey(value: int(tool));
217	}
218
219	static const char *pointerTypeName(QPointingDevice::PointerType ptype) {
220	static const QMetaObject *metaObject = qt_getEnumMetaObject(ptype);
221	static const QMetaEnum me = metaObject->enumerator(index: metaObject->indexOfEnumerator(name: qt_getEnumName(ptype)));
222	return me.valueToKey(value: int(ptype));
223	}
224	#endif
225
226	void QXcbConnection::xi2SetupSlavePointerDevice(void *info, bool removeExisting, QPointingDevice *master)
227	{
228	auto *deviceInfo = reinterpret_cast<xcb_input_xi_device_info_t *>(info);
229	if (removeExisting) {
230	#if QT_CONFIG(tabletevent)
231	for (int i = 0; i < m_tabletData.size(); ++i) {
232	if (m_tabletData.at(i).deviceId == deviceInfo->deviceid) {
233	m_tabletData.remove(i);
234	break;
235	}
236	}
237	#endif
238	m_touchDevices.remove(key: deviceInfo->deviceid);
239	}
240
241	const QByteArray nameRaw = QByteArray(xcb_input_xi_device_info_name(R: deviceInfo),
242	xcb_input_xi_device_info_name_length(R: deviceInfo));
243	const QString name = QString::fromUtf8(ba: nameRaw);
244	m_xiSlavePointerIds.append(t: deviceInfo->deviceid);
245	qCDebug(lcQpaInputDevices) << "input device " << name << "ID" << deviceInfo->deviceid;
246	#if QT_CONFIG(tabletevent)
247	TabletData tabletData;
248	#endif
249	QXcbScrollingDevicePrivate *scrollingDeviceP = nullptr;
250	bool used = false;
251	auto scrollingDevice = [&]() {
252	if (!scrollingDeviceP)
253	scrollingDeviceP = new QXcbScrollingDevicePrivate(name, deviceInfo->deviceid,
254	QInputDevice::Capability::Scroll);
255	return scrollingDeviceP;
256	};
257
258	int buttonCount = 32;
259	auto classes_it = xcb_input_xi_device_info_classes_iterator(R: deviceInfo);
260	for (; classes_it.rem; xcb_input_device_class_next(i: &classes_it)) {
261	xcb_input_device_class_t *classinfo = classes_it.data;
262	switch (classinfo->type) {
263	case XCB_INPUT_DEVICE_CLASS_TYPE_VALUATOR: {
264	auto *vci = reinterpret_cast<xcb_input_valuator_class_t *>(classinfo);
265	const int valuatorAtom = qatom(atom: vci->label);
266	qCDebug(lcQpaInputDevices) << " has valuator" << atomName(atom: vci->label) << "recognized?" << (valuatorAtom < QXcbAtom::NAtoms);
267	#if QT_CONFIG(tabletevent)
268	if (valuatorAtom < QXcbAtom::NAtoms) {
269	TabletData::ValuatorClassInfo info;
270	info.minVal = fixed3232ToReal(val: vci->min);
271	info.maxVal = fixed3232ToReal(val: vci->max);
272	info.number = vci->number;
273	tabletData.valuatorInfo[valuatorAtom] = info;
274	}
275	#endif // QT_CONFIG(tabletevent)
276	if (valuatorAtom == QXcbAtom::AtomRelHorizScroll || valuatorAtom == QXcbAtom::AtomRelHorizWheel)
277	scrollingDevice()->lastScrollPosition.setX(fixed3232ToReal(val: vci->value));
278	else if (valuatorAtom == QXcbAtom::AtomRelVertScroll || valuatorAtom == QXcbAtom::AtomRelVertWheel)
279	scrollingDevice()->lastScrollPosition.setY(fixed3232ToReal(val: vci->value));
280	break;
281	}
282	case XCB_INPUT_DEVICE_CLASS_TYPE_SCROLL: {
283	auto *sci = reinterpret_cast<xcb_input_scroll_class_t *>(classinfo);
284	if (sci->scroll_type == XCB_INPUT_SCROLL_TYPE_VERTICAL) {
285	auto dev = scrollingDevice();
286	dev->orientations.setFlag(flag: Qt::Vertical);
287	dev->verticalIndex = sci->number;
288	dev->verticalIncrement = fixed3232ToReal(val: sci->increment);
289	} else if (sci->scroll_type == XCB_INPUT_SCROLL_TYPE_HORIZONTAL) {
290	auto dev = scrollingDevice();
291	dev->orientations.setFlag(flag: Qt::Horizontal);
292	dev->horizontalIndex = sci->number;
293	dev->horizontalIncrement = fixed3232ToReal(val: sci->increment);
294	}
295	break;
296	}
297	case XCB_INPUT_DEVICE_CLASS_TYPE_BUTTON: {
298	auto *bci = reinterpret_cast<xcb_input_button_class_t *>(classinfo);
299	xcb_atom_t *labels = nullptr;
300	if (bci->num_buttons >= 5) {
301	labels = xcb_input_button_class_labels(R: bci);
302	xcb_atom_t label4 = labels[3];
303	xcb_atom_t label5 = labels[4];
304	// Some drivers have no labels on the wheel buttons, some have no label on just one and some have no label on
305	// button 4 and the wrong one on button 5. So we just check that they are not labelled with unrelated buttons.
306	if ((!label4 || qatom(atom: label4) == QXcbAtom::AtomButtonWheelUp || qatom(atom: label4) == QXcbAtom::AtomButtonWheelDown) &&
307	(!label5 || qatom(atom: label5) == QXcbAtom::AtomButtonWheelUp || qatom(atom: label5) == QXcbAtom::AtomButtonWheelDown))
308	scrollingDevice()->legacyOrientations |= Qt::Vertical;
309	}
310	if (bci->num_buttons >= 7) {
311	xcb_atom_t label6 = labels[5];
312	xcb_atom_t label7 = labels[6];
313	if ((!label6 || qatom(atom: label6) == QXcbAtom::AtomButtonHorizWheelLeft) && (!label7 || qatom(atom: label7) == QXcbAtom::AtomButtonHorizWheelRight))
314	scrollingDevice()->legacyOrientations |= Qt::Horizontal;
315	}
316	buttonCount = bci->num_buttons;
317	qCDebug(lcQpaInputDevices, " has %d buttons", bci->num_buttons);
318	break;
319	}
320	case XCB_INPUT_DEVICE_CLASS_TYPE_KEY:
321	qCDebug(lcQpaInputDevices) << " it's a keyboard";
322	break;
323	case XCB_INPUT_DEVICE_CLASS_TYPE_TOUCH:
324	#if QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
325	case XCB_INPUT_DEVICE_CLASS_TYPE_GESTURE:
326	#endif // QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
327	// will be handled in populateTouchDevices()
328	break;
329	default:
330	qCDebug(lcQpaInputDevices) << " has class" << classinfo->type;
331	break;
332	}
333	}
334	bool isTablet = false;
335	#if QT_CONFIG(tabletevent)
336	// If we have found the valuators which we expect a tablet to have, it might be a tablet.
337	if (tabletData.valuatorInfo.contains(key: QXcbAtom::AtomAbsX) &&
338	tabletData.valuatorInfo.contains(key: QXcbAtom::AtomAbsY) &&
339	tabletData.valuatorInfo.contains(key: QXcbAtom::AtomAbsPressure))
340	isTablet = true;
341
342	// But we need to be careful not to take the touch and tablet-button devices as tablets.
343	QByteArray nameLower = nameRaw.toLower();
344	QString dbgType = "UNKNOWN"_L1;
345	if (nameLower.contains(bv: "eraser")) {
346	isTablet = true;
347	tabletData.pointerType = QPointingDevice::PointerType::Eraser;
348	dbgType = "eraser"_L1;
349	} else if (nameLower.contains(bv: "cursor") && !(nameLower.contains(bv: "cursor controls") && nameLower.contains(bv: "trackball"))) {
350	isTablet = true;
351	tabletData.pointerType = QPointingDevice::PointerType::Cursor;
352	dbgType = "cursor"_L1;
353	} else if (nameLower.contains(bv: "wacom") && nameLower.contains(bv: "finger touch")) {
354	isTablet = false;
355	} else if ((nameLower.contains(bv: "pen") || nameLower.contains(bv: "stylus")) && isTablet) {
356	tabletData.pointerType = QPointingDevice::PointerType::Pen;
357	dbgType = "pen"_L1;
358	} else if (nameLower.contains(bv: "wacom") && isTablet && !nameLower.contains(bv: "touch")) {
359	// combined device (evdev) rather than separate pen/eraser (wacom driver)
360	tabletData.pointerType = QPointingDevice::PointerType::Pen;
361	dbgType = "pen"_L1;
362	} else if (nameLower.contains(bv: "aiptek") /* && device == QXcbAtom::AtomKEYBOARD */) {
363	// some "Genius" tablets
364	isTablet = true;
365	tabletData.pointerType = QPointingDevice::PointerType::Pen;
366	dbgType = "pen"_L1;
367	} else if (nameLower.contains(bv: "waltop") && nameLower.contains(bv: "tablet")) {
368	// other "Genius" tablets
369	// WALTOP International Corp. Slim Tablet
370	isTablet = true;
371	tabletData.pointerType = QPointingDevice::PointerType::Pen;
372	dbgType = "pen"_L1;
373	} else if (nameLower.contains(bv: "uc-logic") && isTablet) {
374	tabletData.pointerType = QPointingDevice::PointerType::Pen;
375	dbgType = "pen"_L1;
376	} else if (nameLower.contains(bv: "ugee")) {
377	isTablet = true;
378	tabletData.pointerType = QPointingDevice::PointerType::Pen;
379	dbgType = "pen"_L1;
380	} else {
381	isTablet = false;
382	}
383
384	if (isTablet) {
385	tabletData.deviceId = deviceInfo->deviceid;
386	tabletData.name = name;
387	m_tabletData.append(t: tabletData);
388	qCDebug(lcQpaInputDevices) << " it's a tablet with pointer type" << dbgType;
389	QPointingDevice::Capabilities capsOverride = QInputDevice::Capability::None;
390	if (tabletData.valuatorInfo.contains(key: QXcbAtom::AtomAbsTiltX))
391	capsOverride.setFlag(flag: QInputDevice::Capability::XTilt);
392	if (tabletData.valuatorInfo.contains(key: QXcbAtom::AtomAbsTiltY))
393	capsOverride.setFlag(flag: QInputDevice::Capability::YTilt);
394	// TODO can we get USB ID?
395	Q_ASSERT(deviceInfo->deviceid == tabletData.deviceId);
396	const QPointingDevice *dev = tabletToolInstance(master,
397	tabletName: tabletData.name, id: deviceInfo->deviceid, usbId: 0, toolId: 0, uniqueId: tabletData.serialId,
398	pointerTypeOverride: tabletData.pointerType, capsOverride);
399	Q_ASSERT(dev);
400	}
401	#endif // QT_CONFIG(tabletevent)
402
403	if (scrollingDeviceP) {
404	// Only use legacy wheel button events when we don't have real scroll valuators.
405	scrollingDeviceP->legacyOrientations &= ~scrollingDeviceP->orientations;
406	qCDebug(lcQpaInputDevices) << " it's a scrolling device";
407	}
408
409	if (!isTablet) {
410	TouchDeviceData *dev = populateTouchDevices(info: deviceInfo, scrollingDeviceP, used: &used);
411	if (dev && lcQpaInputDevices().isDebugEnabled()) {
412	if (dev->qtTouchDevice->type() == QInputDevice::DeviceType::TouchScreen)
413	qCDebug(lcQpaInputDevices, " it's a touchscreen with type %d capabilities 0x%X max touch points %d",
414	int(dev->qtTouchDevice->type()), qint32(dev->qtTouchDevice->capabilities()),
415	dev->qtTouchDevice->maximumPoints());
416	else if (dev->qtTouchDevice->type() == QInputDevice::DeviceType::TouchPad)
417	qCDebug(lcQpaInputDevices, " it's a touchpad with type %d capabilities 0x%X max touch points %d size %f x %f",
418	int(dev->qtTouchDevice->type()), qint32(dev->qtTouchDevice->capabilities()),
419	dev->qtTouchDevice->maximumPoints(),
420	dev->size.width(), dev->size.height());
421	}
422	}
423
424	if (!QInputDevicePrivate::fromId(systemId: deviceInfo->deviceid)) {
425	qCDebug(lcQpaInputDevices) << " it's a mouse";
426	QInputDevice::Capabilities caps = QInputDevice::Capability::Position | QInputDevice::Capability::Hover;
427	if (scrollingDeviceP) {
428	scrollingDeviceP->capabilities |= caps;
429	scrollingDeviceP->buttonCount = buttonCount;
430	if (master)
431	scrollingDeviceP->seatName = master->seatName();
432	QWindowSystemInterface::registerInputDevice(device: new QXcbScrollingDevice(*scrollingDeviceP, master));
433	used = true;
434	} else {
435	QWindowSystemInterface::registerInputDevice(device: new QPointingDevice(
436	name, deviceInfo->deviceid,
437	QInputDevice::DeviceType::Mouse, QPointingDevice::PointerType::Generic,
438	caps, 1, buttonCount, (master ? master->seatName() : QString()), QPointingDeviceUniqueId(), master));
439	}
440	}
441
442	if (!used && scrollingDeviceP) {
443	QXcbScrollingDevice *holder = new QXcbScrollingDevice(*scrollingDeviceP, master);
444	holder->deleteLater();
445	}
446	}
447
448	/*!
449	Find all X11 input devices at startup, or react to a device hierarchy event,
450	and create/delete the corresponding QInputDevice instances as necessary.
451	Afterwards, we expect QInputDevice::devices() to contain only the
452	Qt-relevant devices that \c {xinput list} reports. The parent of each master
453	device is this QXcbConnection object; the parent of each slave is its master.
454	*/
455	void QXcbConnection::xi2SetupDevices()
456	{
457	m_xiMasterPointerIds.clear();
458
459	auto reply = Q_XCB_REPLY(xcb_input_xi_query_device, xcb_connection(), XCB_INPUT_DEVICE_ALL);
460	if (!reply) {
461	qCDebug(lcQpaInputDevices) << "failed to query devices";
462	return;
463	}
464
465	// Start with all known devices; remove the ones that still exist.
466	// Afterwards, previousDevices will be the list of those that we should delete.
467	QList<const QInputDevice *> previousDevices = QInputDevice::devices();
468	// Return true if the device with the given systemId is new;
469	// otherwise remove it from previousDevices and return false.
470	auto newOrKeep = [&previousDevices](qint64 systemId) {
471	// if nothing is removed from previousDevices, it's a new device
472	return !previousDevices.removeIf(pred: [systemId](const QInputDevice *dev) {
473	return dev->systemId() == systemId;
474	});
475	};
476
477	// XInput doesn't provide a way to identify "seats"; but each device has an attachment to another device.
478	// So we make up a seatId: master-keyboard-id << 16 | master-pointer-id.
479
480	auto it = xcb_input_xi_query_device_infos_iterator(R: reply.get());
481	for (; it.rem; xcb_input_xi_device_info_next(i: &it)) {
482	xcb_input_xi_device_info_t *deviceInfo = it.data;
483	switch (deviceInfo->type) {
484	case XCB_INPUT_DEVICE_TYPE_MASTER_KEYBOARD: {
485	if (newOrKeep(deviceInfo->deviceid)) {
486	auto dev = new QInputDevice(QString::fromUtf8(utf8: xcb_input_xi_device_info_name(R: deviceInfo)),
487	deviceInfo->deviceid, QInputDevice::DeviceType::Keyboard,
488	QString::number(deviceInfo->deviceid << 16 | deviceInfo->attachment, base: 16), this);
489	QWindowSystemInterface::registerInputDevice(device: dev);
490	}
491	} break;
492	case XCB_INPUT_DEVICE_TYPE_MASTER_POINTER: {
493	m_xiMasterPointerIds.append(t: deviceInfo->deviceid);
494	if (newOrKeep(deviceInfo->deviceid)) {
495	auto dev = new QXcbScrollingDevice(QString::fromUtf8(utf8: xcb_input_xi_device_info_name(R: deviceInfo)), deviceInfo->deviceid,
496	QInputDevice::Capability::Position | QInputDevice::Capability::Scroll | QInputDevice::Capability::Hover,
497	32, QString::number(deviceInfo->attachment << 16 | deviceInfo->deviceid, base: 16), this);
498	QWindowSystemInterface::registerInputDevice(device: dev);
499	}
500	continue;
501	} break;
502	default:
503	break;
504	}
505	}
506
507	it = xcb_input_xi_query_device_infos_iterator(R: reply.get());
508	for (; it.rem; xcb_input_xi_device_info_next(i: &it)) {
509	xcb_input_xi_device_info_t *deviceInfo = it.data;
510	switch (deviceInfo->type) {
511	case XCB_INPUT_DEVICE_TYPE_MASTER_KEYBOARD:
512	case XCB_INPUT_DEVICE_TYPE_MASTER_POINTER:
513	// already registered
514	break;
515	case XCB_INPUT_DEVICE_TYPE_SLAVE_POINTER: {
516	if (newOrKeep(deviceInfo->deviceid)) {
517	m_xiSlavePointerIds.append(t: deviceInfo->deviceid);
518	QInputDevice *master = const_cast<QInputDevice *>(QInputDevicePrivate::fromId(systemId: deviceInfo->attachment));
519	Q_ASSERT(master);
520	xi2SetupSlavePointerDevice(info: deviceInfo, removeExisting: false, master: qobject_cast<QPointingDevice *>(object: master));
521	}
522	} break;
523	case XCB_INPUT_DEVICE_TYPE_SLAVE_KEYBOARD: {
524	if (newOrKeep(deviceInfo->deviceid)) {
525	QInputDevice *master = const_cast<QInputDevice *>(QInputDevicePrivate::fromId(systemId: deviceInfo->attachment));
526	Q_ASSERT(master);
527	QWindowSystemInterface::registerInputDevice(device: new QInputDevice(
528	QString::fromUtf8(utf8: xcb_input_xi_device_info_name(R: deviceInfo)), deviceInfo->deviceid,
529	QInputDevice::DeviceType::Keyboard, master->seatName(), master));
530	}
531	} break;
532	case XCB_INPUT_DEVICE_TYPE_FLOATING_SLAVE:
533	break;
534	}
535	}
536
537	// previousDevices is now the list of those that are no longer found
538	qCDebug(lcQpaInputDevices) << "removed" << previousDevices;
539	for (auto it = previousDevices.constBegin(); it != previousDevices.constEnd(); ++it) {
540	const auto id = (*it)->systemId();
541	m_xiSlavePointerIds.removeAll(t: id);
542	m_touchDevices.remove(key: id);
543	}
544	qDeleteAll(c: previousDevices);
545
546	if (m_xiMasterPointerIds.size() > 1)
547	qCDebug(lcQpaInputDevices) << "multi-pointer X detected";
548	}
549
550	QXcbConnection::TouchDeviceData *QXcbConnection::touchDeviceForId(int id)
551	{
552	TouchDeviceData *dev = nullptr;
553	if (m_touchDevices.contains(key: id))
554	dev = &m_touchDevices[id];
555	return dev;
556	}
557
558	QXcbConnection::TouchDeviceData *QXcbConnection::populateTouchDevices(void *info, QXcbScrollingDevicePrivate *scrollingDeviceP, bool *used)
559	{
560	auto *deviceInfo = reinterpret_cast<xcb_input_xi_device_info_t *>(info);
561	QPointingDevice::Capabilities caps;
562	QInputDevice::DeviceType type = QInputDevice::DeviceType::Unknown;
563	int maxTouchPoints = 1;
564	bool isTouchDevice = false;
565	bool hasRelativeCoords = false;
566	TouchDeviceData dev;
567	auto classes_it = xcb_input_xi_device_info_classes_iterator(R: deviceInfo);
568	for (; classes_it.rem; xcb_input_device_class_next(i: &classes_it)) {
569	xcb_input_device_class_t *classinfo = classes_it.data;
570	switch (classinfo->type) {
571	case XCB_INPUT_DEVICE_CLASS_TYPE_TOUCH: {
572	auto *tci = reinterpret_cast<xcb_input_touch_class_t *>(classinfo);
573	maxTouchPoints = tci->num_touches;
574	qCDebug(lcQpaInputDevices, " has touch class with mode %d", tci->mode);
575	switch (tci->mode) {
576	case XCB_INPUT_TOUCH_MODE_DEPENDENT:
577	type = QInputDevice::DeviceType::TouchPad;
578	break;
579	case XCB_INPUT_TOUCH_MODE_DIRECT:
580	type = QInputDevice::DeviceType::TouchScreen;
581	break;
582	}
583	break;
584	}
585	#if QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
586	case XCB_INPUT_DEVICE_CLASS_TYPE_GESTURE: {
587	// Note that gesture devices can only be touchpads (i.e. dependent devices in XInput
588	// naming convention). According to XI 2.4, the same device can't have touch and
589	// gesture device classes.
590	auto *gci = reinterpret_cast<xcb_input_gesture_class_t *>(classinfo);
591	maxTouchPoints = gci->num_touches;
592	qCDebug(lcQpaInputDevices, " has gesture class");
593	type = QInputDevice::DeviceType::TouchPad;
594	break;
595	}
596	#endif // QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
597	case XCB_INPUT_DEVICE_CLASS_TYPE_VALUATOR: {
598	auto *vci = reinterpret_cast<xcb_input_valuator_class_t *>(classinfo);
599	const QXcbAtom::Atom valuatorAtom = qatom(atom: vci->label);
600	if (valuatorAtom < QXcbAtom::NAtoms) {
601	TouchDeviceData::ValuatorClassInfo info;
602	info.min = fixed3232ToReal(val: vci->min);
603	info.max = fixed3232ToReal(val: vci->max);
604	info.number = vci->number;
605	info.label = valuatorAtom;
606	dev.valuatorInfo.append(t: info);
607	}
608	// Some devices (mice) report a resolution of 0; they will be excluded later,
609	// for now just prevent a division by zero
610	const int vciResolution = vci->resolution ? vci->resolution : 1;
611	if (valuatorAtom == QXcbAtom::AtomAbsMTPositionX)
612	caps |= QInputDevice::Capability::Position | QInputDevice::Capability::NormalizedPosition;
613	else if (valuatorAtom == QXcbAtom::AtomAbsMTTouchMajor)
614	caps |= QInputDevice::Capability::Area;
615	else if (valuatorAtom == QXcbAtom::AtomAbsMTOrientation)
616	dev.providesTouchOrientation = true;
617	else if (valuatorAtom == QXcbAtom::AtomAbsMTPressure || valuatorAtom == QXcbAtom::AtomAbsPressure)
618	caps |= QInputDevice::Capability::Pressure;
619	else if (valuatorAtom == QXcbAtom::AtomRelX) {
620	hasRelativeCoords = true;
621	dev.size.setWidth((fixed3232ToReal(val: vci->max) - fixed3232ToReal(val: vci->min)) * 1000.0 / vciResolution);
622	} else if (valuatorAtom == QXcbAtom::AtomRelY) {
623	hasRelativeCoords = true;
624	dev.size.setHeight((fixed3232ToReal(val: vci->max) - fixed3232ToReal(val: vci->min)) * 1000.0 / vciResolution);
625	} else if (valuatorAtom == QXcbAtom::AtomAbsX) {
626	caps |= QInputDevice::Capability::Position;
627	dev.size.setWidth((fixed3232ToReal(val: vci->max) - fixed3232ToReal(val: vci->min)) * 1000.0 / vciResolution);
628	} else if (valuatorAtom == QXcbAtom::AtomAbsY) {
629	caps |= QInputDevice::Capability::Position;
630	dev.size.setHeight((fixed3232ToReal(val: vci->max) - fixed3232ToReal(val: vci->min)) * 1000.0 / vciResolution);
631	} else if (valuatorAtom == QXcbAtom::AtomRelVertWheel || valuatorAtom == QXcbAtom::AtomRelHorizWheel) {
632	caps |= QInputDevice::Capability::Scroll;
633	}
634	break;
635	}
636	default:
637	break;
638	}
639	}
640	if (type == QInputDevice::DeviceType::Unknown && caps && hasRelativeCoords) {
641	type = QInputDevice::DeviceType::TouchPad;
642	if (dev.size.width() < 10 || dev.size.height() < 10 ||
643	dev.size.width() > 10000 || dev.size.height() > 10000)
644	dev.size = QSizeF(130, 110);
645	}
646	if (!isAtLeastXI22() || type == QInputDevice::DeviceType::TouchPad)
647	caps |= QInputDevice::Capability::MouseEmulation;
648
649	if (type == QInputDevice::DeviceType::TouchScreen || type == QInputDevice::DeviceType::TouchPad) {
650	QInputDevice *master = const_cast<QInputDevice *>(QInputDevicePrivate::fromId(systemId: deviceInfo->attachment));
651	Q_ASSERT(master);
652	if (scrollingDeviceP) {
653	// valuators were already discovered in QXcbConnection::xi2SetupSlavePointerDevice, so just finish initialization
654	scrollingDeviceP->deviceType = type;
655	scrollingDeviceP->pointerType = QPointingDevice::PointerType::Finger;
656	scrollingDeviceP->capabilities |= caps;
657	scrollingDeviceP->maximumTouchPoints = maxTouchPoints;
658	scrollingDeviceP->buttonCount = 3;
659	scrollingDeviceP->seatName = master->seatName();
660	dev.qtTouchDevice = new QXcbScrollingDevice(*scrollingDeviceP, master);
661	if (Q_UNLIKELY(!caps.testFlag(QInputDevice::Capability::Scroll)))
662	qCDebug(lcQpaInputDevices) << "unexpectedly missing RelVert/HorizWheel atoms for touchpad with scroll capability" << dev.qtTouchDevice;
663	*used = true;
664	} else {
665	dev.qtTouchDevice = new QPointingDevice(QString::fromUtf8(utf8: xcb_input_xi_device_info_name(R: deviceInfo),
666	size: xcb_input_xi_device_info_name_length(R: deviceInfo)),
667	deviceInfo->deviceid,
668	type, QPointingDevice::PointerType::Finger, caps, maxTouchPoints, 0,
669	master->seatName(), QPointingDeviceUniqueId(), master);
670	}
671	if (caps != 0)
672	QWindowSystemInterface::registerInputDevice(device: dev.qtTouchDevice);
673	m_touchDevices[deviceInfo->deviceid] = dev;
674	isTouchDevice = true;
675	}
676
677	return isTouchDevice ? &m_touchDevices[deviceInfo->deviceid] : nullptr;
678	}
679
680	static inline qreal fixed1616ToReal(xcb_input_fp1616_t val)
681	{
682	return qreal(val) / 0x10000;
683	}
684
685	void QXcbConnection::xi2HandleEvent(xcb_ge_event_t *event)
686	{
687	auto *xiEvent = reinterpret_cast<qt_xcb_input_device_event_t *>(event);
688	setTime(xiEvent->time);
689	if (m_xiSlavePointerIds.contains(t: xiEvent->deviceid) && xiEvent->event_type != XCB_INPUT_PROPERTY) {
690	if (!m_duringSystemMoveResize)
691	return;
692	if (xiEvent->event == XCB_NONE)
693	return;
694
695	if (xiEvent->event_type == XCB_INPUT_BUTTON_RELEASE
696	&& xiEvent->detail == XCB_BUTTON_INDEX_1 ) {
697	abortSystemMoveResize(window: xiEvent->event);
698	} else if (xiEvent->event_type == XCB_INPUT_TOUCH_END) {
699	abortSystemMoveResize(window: xiEvent->event);
700	return;
701	} else {
702	return;
703	}
704	}
705	int sourceDeviceId = xiEvent->deviceid; // may be the master id
706	qt_xcb_input_device_event_t *xiDeviceEvent = nullptr;
707	xcb_input_enter_event_t *xiEnterEvent = nullptr;
708	QXcbWindowEventListener *eventListener = nullptr;
709
710	switch (xiEvent->event_type) {
711	case XCB_INPUT_BUTTON_PRESS:
712	case XCB_INPUT_BUTTON_RELEASE:
713	case XCB_INPUT_MOTION:
714	case XCB_INPUT_TOUCH_BEGIN:
715	case XCB_INPUT_TOUCH_UPDATE:
716	case XCB_INPUT_TOUCH_END:
717	{
718	xiDeviceEvent = xiEvent;
719	eventListener = windowEventListenerFromId(id: xiDeviceEvent->event);
720	sourceDeviceId = xiDeviceEvent->sourceid; // use the actual device id instead of the master
721	break;
722	}
723	#if QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
724	case XCB_INPUT_GESTURE_PINCH_BEGIN:
725	case XCB_INPUT_GESTURE_PINCH_UPDATE:
726	case XCB_INPUT_GESTURE_PINCH_END:
727	xi2HandleGesturePinchEvent(event);
728	return;
729	case XCB_INPUT_GESTURE_SWIPE_BEGIN:
730	case XCB_INPUT_GESTURE_SWIPE_UPDATE:
731	case XCB_INPUT_GESTURE_SWIPE_END:
732	xi2HandleGestureSwipeEvent(event);
733	return;
734	#endif // QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
735	case XCB_INPUT_ENTER:
736	case XCB_INPUT_LEAVE: {
737	xiEnterEvent = reinterpret_cast<xcb_input_enter_event_t *>(event);
738	eventListener = windowEventListenerFromId(id: xiEnterEvent->event);
739	sourceDeviceId = xiEnterEvent->sourceid; // use the actual device id instead of the master
740	break;
741	}
742	case XCB_INPUT_HIERARCHY:
743	xi2HandleHierarchyEvent(event);
744	return;
745	case XCB_INPUT_DEVICE_CHANGED:
746	xi2HandleDeviceChangedEvent(event);
747	return;
748	default:
749	break;
750	}
751
752	if (eventListener) {
753	if (eventListener->handleNativeEvent(reinterpret_cast<xcb_generic_event_t *>(event)))
754	return;
755	}
756
757	#if QT_CONFIG(tabletevent)
758	if (!xiEnterEvent) {
759	// TODO we need the UID here; tabletDataForDevice doesn't have enough to go on (?)
760	QXcbConnection::TabletData *tablet = tabletDataForDevice(id: sourceDeviceId);
761	if (tablet && xi2HandleTabletEvent(event, tabletData: tablet))
762	return;
763	}
764	#endif // QT_CONFIG(tabletevent)
765
766	if (auto device = QPointingDevicePrivate::pointingDeviceById(systemId: sourceDeviceId))
767	xi2HandleScrollEvent(event, scrollingDevice: device);
768	else
769	qCDebug(lcQpaXInputEvents) << "scroll event from unregistered device" << sourceDeviceId;
770
771	if (xiDeviceEvent) {
772	switch (xiDeviceEvent->event_type) {
773	case XCB_INPUT_BUTTON_PRESS:
774	case XCB_INPUT_BUTTON_RELEASE:
775	case XCB_INPUT_MOTION:
776	if (eventListener && !(xiDeviceEvent->flags & XCB_INPUT_POINTER_EVENT_FLAGS_POINTER_EMULATED))
777	eventListener->handleXIMouseEvent(event);
778	break;
779
780	case XCB_INPUT_TOUCH_BEGIN:
781	case XCB_INPUT_TOUCH_UPDATE:
782	case XCB_INPUT_TOUCH_END:
783	if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled()))
784	qCDebug(lcQpaXInputEvents, "XI2 touch event type %d seq %d detail %d pos %6.1f, %6.1f root pos %6.1f, %6.1f on window %x",
785	event->event_type, xiDeviceEvent->sequence, xiDeviceEvent->detail,
786	fixed1616ToReal(xiDeviceEvent->event_x), fixed1616ToReal(xiDeviceEvent->event_y),
787	fixed1616ToReal(xiDeviceEvent->root_x), fixed1616ToReal(xiDeviceEvent->root_y),xiDeviceEvent->event);
788	if (QXcbWindow *platformWindow = platformWindowFromId(id: xiDeviceEvent->event)) {
789	xi2ProcessTouch(xiDevEvent: xiDeviceEvent, platformWindow);
790	} else { // When the window cannot be matched, delete it from touchPoints
791	if (TouchDeviceData *dev = touchDeviceForId(id: xiDeviceEvent->sourceid))
792	dev->touchPoints.remove(key: (xiDeviceEvent->detail % INT_MAX));
793	}
794	break;
795	}
796	} else if (xiEnterEvent && eventListener) {
797	switch (xiEnterEvent->event_type) {
798	case XCB_INPUT_ENTER:
799	case XCB_INPUT_LEAVE:
800	eventListener->handleXIEnterLeave(event);
801	break;
802	}
803	}
804	}
805
806	bool QXcbConnection::isTouchScreen(int id)
807	{
808	auto device = touchDeviceForId(id);
809	return device && device->qtTouchDevice->type() == QInputDevice::DeviceType::TouchScreen;
810	}
811
812	void QXcbConnection::xi2ProcessTouch(void *xiDevEvent, QXcbWindow *platformWindow)
813	{
814	auto *xiDeviceEvent = reinterpret_cast<xcb_input_touch_begin_event_t *>(xiDevEvent);
815	TouchDeviceData *dev = touchDeviceForId(id: xiDeviceEvent->sourceid);
816	if (!dev) {
817	qCDebug(lcQpaXInputEvents) << "didn't find the dev for given sourceid - " << xiDeviceEvent->sourceid
818	<< ", try to repopulate xi2 devices";
819	xi2SetupDevices();
820	dev = touchDeviceForId(id: xiDeviceEvent->sourceid);
821	if (!dev) {
822	qCDebug(lcQpaXInputEvents) << "still can't find the dev for it, give up.";
823	return;
824	}
825	}
826	const bool firstTouch = dev->touchPoints.isEmpty();
827	if (xiDeviceEvent->event_type == XCB_INPUT_TOUCH_BEGIN) {
828	QWindowSystemInterface::TouchPoint tp;
829	tp.id = xiDeviceEvent->detail % INT_MAX;
830	tp.state = QEventPoint::State::Pressed;
831	tp.pressure = -1.0;
832	dev->touchPoints[tp.id] = tp;
833	}
834	QWindowSystemInterface::TouchPoint &touchPoint = dev->touchPoints[xiDeviceEvent->detail];
835	QXcbScreen* screen = platformWindow->xcbScreen();
836	qreal x = fixed1616ToReal(val: xiDeviceEvent->root_x);
837	qreal y = fixed1616ToReal(val: xiDeviceEvent->root_y);
838	qreal nx = -1.0, ny = -1.0;
839	qreal w = 0.0, h = 0.0;
840	bool majorAxisIsY = touchPoint.area.height() > touchPoint.area.width();
841	for (const TouchDeviceData::ValuatorClassInfo &vci : std::as_const(t&: dev->valuatorInfo)) {
842	double value;
843	if (!xi2GetValuatorValueIfSet(event: xiDeviceEvent, valuatorNum: vci.number, value: &value))
844	continue;
845	if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled()))
846	qCDebug(lcQpaXInputEvents, " valuator %20s value %lf from range %lf -> %lf",
847	atomName(atom(vci.label)).constData(), value, vci.min, vci.max);
848	if (value > vci.max)
849	value = vci.max;
850	if (value < vci.min)
851	value = vci.min;
852	qreal valuatorNormalized = (value - vci.min) / (vci.max - vci.min);
853	if (vci.label == QXcbAtom::AtomRelX) {
854	nx = valuatorNormalized;
855	} else if (vci.label == QXcbAtom::AtomRelY) {
856	ny = valuatorNormalized;
857	} else if (vci.label == QXcbAtom::AtomAbsX) {
858	nx = valuatorNormalized;
859	} else if (vci.label == QXcbAtom::AtomAbsY) {
860	ny = valuatorNormalized;
861	} else if (vci.label == QXcbAtom::AtomAbsMTPositionX) {
862	nx = valuatorNormalized;
863	} else if (vci.label == QXcbAtom::AtomAbsMTPositionY) {
864	ny = valuatorNormalized;
865	} else if (vci.label == QXcbAtom::AtomAbsMTTouchMajor) {
866	const qreal sw = screen->geometry().width();
867	const qreal sh = screen->geometry().height();
868	w = valuatorNormalized * qHypot(x: sw, y: sh);
869	} else if (vci.label == QXcbAtom::AtomAbsMTTouchMinor) {
870	const qreal sw = screen->geometry().width();
871	const qreal sh = screen->geometry().height();
872	h = valuatorNormalized * qHypot(x: sw, y: sh);
873	} else if (vci.label == QXcbAtom::AtomAbsMTOrientation) {
874	// Find the closest axis.
875	// 0 corresponds to the Y axis, vci.max to the X axis.
876	// Flipping over the Y axis and rotating by 180 degrees
877	// don't change the result, so normalize value to range
878	// [0, vci.max] first.
879	value = qAbs(t: value);
880	while (value > vci.max)
881	value -= 2 * vci.max;
882	value = qAbs(t: value);
883	majorAxisIsY = value < vci.max - value;
884	} else if (vci.label == QXcbAtom::AtomAbsMTPressure || vci.label == QXcbAtom::AtomAbsPressure) {
885	touchPoint.pressure = valuatorNormalized;
886	}
887
888	}
889	// If any value was not updated, use the last-known value.
890	if (nx == -1.0) {
891	x = touchPoint.area.center().x();
892	nx = x / screen->geometry().width();
893	}
894	if (ny == -1.0) {
895	y = touchPoint.area.center().y();
896	ny = y / screen->geometry().height();
897	}
898	if (xiDeviceEvent->event_type != XCB_INPUT_TOUCH_END) {
899	if (!dev->providesTouchOrientation) {
900	if (w == 0.0)
901	w = touchPoint.area.width();
902	h = w;
903	} else {
904	if (w == 0.0)
905	w = qMax(a: touchPoint.area.width(), b: touchPoint.area.height());
906	if (h == 0.0)
907	h = qMin(a: touchPoint.area.width(), b: touchPoint.area.height());
908	if (majorAxisIsY)
909	qSwap(value1&: w, value2&: h);
910	}
911	}
912
913	switch (xiDeviceEvent->event_type) {
914	case XCB_INPUT_TOUCH_BEGIN:
915	if (firstTouch) {
916	dev->firstPressedPosition = QPointF(x, y);
917	dev->firstPressedNormalPosition = QPointF(nx, ny);
918	}
919	dev->pointPressedPosition.insert(key: touchPoint.id, value: QPointF(x, y));
920
921	// Touches must be accepted when we are grabbing touch events. Otherwise the entire sequence
922	// will get replayed when the grab ends.
923	if (m_xiGrab) {
924	xcb_input_xi_allow_events(c: xcb_connection(), XCB_CURRENT_TIME, deviceid: xiDeviceEvent->deviceid,
925	event_mode: XCB_INPUT_EVENT_MODE_ACCEPT_TOUCH,
926	touchid: xiDeviceEvent->detail, grab_window: xiDeviceEvent->event);
927	}
928	break;
929	case XCB_INPUT_TOUCH_UPDATE:
930	if (dev->qtTouchDevice->type() == QInputDevice::DeviceType::TouchPad && dev->pointPressedPosition.value(key: touchPoint.id) == QPointF(x, y)) {
931	qreal dx = (nx - dev->firstPressedNormalPosition.x()) *
932	dev->size.width() * screen->geometry().width() / screen->physicalSize().width();
933	qreal dy = (ny - dev->firstPressedNormalPosition.y()) *
934	dev->size.height() * screen->geometry().height() / screen->physicalSize().height();
935	x = dev->firstPressedPosition.x() + dx;
936	y = dev->firstPressedPosition.y() + dy;
937	touchPoint.state = QEventPoint::State::Updated;
938	} else if (touchPoint.area.center() != QPoint(x, y)) {
939	touchPoint.state = QEventPoint::State::Updated;
940	if (dev->qtTouchDevice->type() == QInputDevice::DeviceType::TouchPad)
941	dev->pointPressedPosition[touchPoint.id] = QPointF(x, y);
942	}
943
944	if (dev->qtTouchDevice->type() == QInputDevice::DeviceType::TouchScreen &&
945	xiDeviceEvent->event == m_startSystemMoveResizeInfo.window &&
946	xiDeviceEvent->sourceid == m_startSystemMoveResizeInfo.deviceid &&
947	xiDeviceEvent->detail == m_startSystemMoveResizeInfo.pointid) {
948	QXcbWindow *window = platformWindowFromId(id: m_startSystemMoveResizeInfo.window);
949	if (window) {
950	xcb_input_xi_allow_events(c: xcb_connection(), XCB_CURRENT_TIME, deviceid: xiDeviceEvent->deviceid,
951	event_mode: XCB_INPUT_EVENT_MODE_REJECT_TOUCH,
952	touchid: xiDeviceEvent->detail, grab_window: xiDeviceEvent->event);
953	window->doStartSystemMoveResize(globalPos: QPoint(x, y), edges: m_startSystemMoveResizeInfo.edges);
954	m_startSystemMoveResizeInfo.window = XCB_NONE;
955	}
956	}
957	break;
958	case XCB_INPUT_TOUCH_END:
959	touchPoint.state = QEventPoint::State::Released;
960	if (dev->qtTouchDevice->type() == QInputDevice::DeviceType::TouchPad && dev->pointPressedPosition.value(key: touchPoint.id) == QPointF(x, y)) {
961	qreal dx = (nx - dev->firstPressedNormalPosition.x()) *
962	dev->size.width() * screen->geometry().width() / screen->physicalSize().width();
963	qreal dy = (ny - dev->firstPressedNormalPosition.y()) *
964	dev->size.width() * screen->geometry().width() / screen->physicalSize().width();
965	x = dev->firstPressedPosition.x() + dx;
966	y = dev->firstPressedPosition.y() + dy;
967	}
968	dev->pointPressedPosition.remove(key: touchPoint.id);
969	}
970	touchPoint.area = QRectF(x - w/2, y - h/2, w, h);
971	touchPoint.normalPosition = QPointF(nx, ny);
972
973	if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled()))
974	qCDebug(lcQpaXInputEvents) << " touchpoint " << touchPoint.id << " state " << touchPoint.state << " pos norm " << touchPoint.normalPosition <<
975	" area " << touchPoint.area << " pressure " << touchPoint.pressure;
976	Qt::KeyboardModifiers modifiers = keyboard()->translateModifiers(s: xiDeviceEvent->mods.effective);
977	QWindowSystemInterface::handleTouchEvent(window: platformWindow->window(), timestamp: xiDeviceEvent->time, device: dev->qtTouchDevice, points: dev->touchPoints.values(), mods: modifiers);
978	if (touchPoint.state == QEventPoint::State::Released)
979	// If a touchpoint was released, we can forget it, because the ID won't be reused.
980	dev->touchPoints.remove(key: touchPoint.id);
981	else
982	// Make sure that we don't send TouchPointPressed/Moved in more than one QTouchEvent
983	// with this touch point if the next XI2 event is about a different touch point.
984	touchPoint.state = QEventPoint::State::Stationary;
985	}
986
987	bool QXcbConnection::startSystemMoveResizeForTouch(xcb_window_t window, int edges)
988	{
989	QHash<int, TouchDeviceData>::const_iterator devIt = m_touchDevices.constBegin();
990	for (; devIt != m_touchDevices.constEnd(); ++devIt) {
991	TouchDeviceData deviceData = devIt.value();
992	if (deviceData.qtTouchDevice->type() == QInputDevice::DeviceType::TouchScreen) {
993	auto pointIt = deviceData.touchPoints.constBegin();
994	for (; pointIt != deviceData.touchPoints.constEnd(); ++pointIt) {
995	QEventPoint::State state = pointIt.value().state;
996	if (state == QEventPoint::State::Updated || state == QEventPoint::State::Pressed || state == QEventPoint::State::Stationary) {
997	m_startSystemMoveResizeInfo.window = window;
998	m_startSystemMoveResizeInfo.deviceid = devIt.key();
999	m_startSystemMoveResizeInfo.pointid = pointIt.key();
1000	m_startSystemMoveResizeInfo.edges = edges;
1001	setDuringSystemMoveResize(true);
1002	qCDebug(lcQpaInputDevices) << "triggered system move or resize from touch";
1003	return true;
1004	}
1005	}
1006	}
1007	}
1008	return false;
1009	}
1010
1011	void QXcbConnection::abortSystemMoveResize(xcb_window_t window)
1012	{
1013	qCDebug(lcQpaInputDevices) << "sending client message NET_WM_MOVERESIZE_CANCEL to window: " << window;
1014	m_startSystemMoveResizeInfo.window = XCB_NONE;
1015
1016	const xcb_atom_t moveResize = connection()->atom(qatom: QXcbAtom::Atom_NET_WM_MOVERESIZE);
1017	xcb_client_message_event_t xev;
1018	xev.response_type = XCB_CLIENT_MESSAGE;
1019	xev.type = moveResize;
1020	xev.sequence = 0;
1021	xev.window = window;
1022	xev.format = 32;
1023	xev.data.data32[0] = 0;
1024	xev.data.data32[1] = 0;
1025	xev.data.data32[2] = 11; // _NET_WM_MOVERESIZE_CANCEL
1026	xev.data.data32[3] = 0;
1027	xev.data.data32[4] = 0;
1028	xcb_send_event(c: xcb_connection(), propagate: false, destination: primaryScreen()->root(),
1029	event_mask: XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY,
1030	event: (const char *)&xev);
1031
1032	m_duringSystemMoveResize = false;
1033	}
1034
1035	bool QXcbConnection::isDuringSystemMoveResize() const
1036	{
1037	return m_duringSystemMoveResize;
1038	}
1039
1040	void QXcbConnection::setDuringSystemMoveResize(bool during)
1041	{
1042	m_duringSystemMoveResize = during;
1043	}
1044
1045	bool QXcbConnection::xi2SetMouseGrabEnabled(xcb_window_t w, bool grab)
1046	{
1047	bool ok = false;
1048
1049	if (grab) { // grab
1050	uint8_t mask[8] = {};
1051	setXcbMask(mask, XCB_INPUT_BUTTON_PRESS);
1052	setXcbMask(mask, XCB_INPUT_BUTTON_RELEASE);
1053	setXcbMask(mask, XCB_INPUT_MOTION);
1054	setXcbMask(mask, XCB_INPUT_ENTER);
1055	setXcbMask(mask, XCB_INPUT_LEAVE);
1056	if (isAtLeastXI22()) {
1057	setXcbMask(mask, XCB_INPUT_TOUCH_BEGIN);
1058	setXcbMask(mask, XCB_INPUT_TOUCH_UPDATE);
1059	setXcbMask(mask, XCB_INPUT_TOUCH_END);
1060	}
1061	#if QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
1062	if (isAtLeastXI24()) {
1063	setXcbMask(mask, XCB_INPUT_GESTURE_PINCH_BEGIN);
1064	setXcbMask(mask, XCB_INPUT_GESTURE_PINCH_UPDATE);
1065	setXcbMask(mask, XCB_INPUT_GESTURE_PINCH_END);
1066	setXcbMask(mask, XCB_INPUT_GESTURE_SWIPE_BEGIN);
1067	setXcbMask(mask, XCB_INPUT_GESTURE_SWIPE_UPDATE);
1068	setXcbMask(mask, XCB_INPUT_GESTURE_SWIPE_END);
1069	}
1070	#endif // QT_CONFIG(gestures) && QT_XCB_HAS_TOUCHPAD_GESTURES
1071
1072	for (int id : std::as_const(t&: m_xiMasterPointerIds)) {
1073	xcb_generic_error_t *error = nullptr;
1074	auto cookie = xcb_input_xi_grab_device(c: xcb_connection(), window: w, XCB_CURRENT_TIME, cursor: XCB_CURSOR_NONE, deviceid: id,
1075	mode: XCB_INPUT_GRAB_MODE_22_ASYNC, paired_device_mode: XCB_INPUT_GRAB_MODE_22_ASYNC,
1076	owner_events: false, mask_len: 2, mask: reinterpret_cast<uint32_t *>(mask));
1077	auto *reply = xcb_input_xi_grab_device_reply(c: xcb_connection(), cookie, e: &error);
1078	if (error) {
1079	qCDebug(lcQpaXInput, "failed to grab events for device %d on window %x"
1080	"(error code %d)", id, w, error->error_code);
1081	free(ptr: error);
1082	} else {
1083	// Managed to grab at least one of master pointers, that should be enough
1084	// to properly dismiss windows that rely on mouse grabbing.
1085	ok = true;
1086	}
1087	free(ptr: reply);
1088	}
1089	} else { // ungrab
1090	for (int id : std::as_const(t&: m_xiMasterPointerIds)) {
1091	auto cookie = xcb_input_xi_ungrab_device_checked(c: xcb_connection(), XCB_CURRENT_TIME, deviceid: id);
1092	xcb_generic_error_t *error = xcb_request_check(c: xcb_connection(), cookie);
1093	if (error) {
1094	qCDebug(lcQpaXInput, "XIUngrabDevice failed - id: %d (error code %d)", id, error->error_code);
1095	free(ptr: error);
1096	}
1097	}
1098	// XIUngrabDevice does not seem to wait for a reply from X server (similar to
1099	// xcb_ungrab_pointer). Ungrabbing won't fail, unless NoSuchExtension error
1100	// has occurred due to a programming error somewhere else in the stack. That
1101	// would mean that things will crash soon anyway.
1102	ok = true;
1103	}
1104
1105	if (ok)
1106	m_xiGrab = grab;
1107
1108	return ok;
1109	}
1110
1111	void QXcbConnection::xi2HandleHierarchyEvent(void *event)
1112	{
1113	auto *xiEvent = reinterpret_cast<xcb_input_hierarchy_event_t *>(event);
1114	// We care about hotplugged devices (slaves) and master devices.
1115	// We don't report anything for DEVICE_ENABLED or DEVICE_DISABLED
1116	// (but often that goes with adding or removal anyway).
1117	// We don't react to SLAVE_ATTACHED or SLAVE_DETACHED either.
1118	if (xiEvent->flags & (XCB_INPUT_HIERARCHY_MASK_MASTER_ADDED |
1119	XCB_INPUT_HIERARCHY_MASK_MASTER_REMOVED |
1120	XCB_INPUT_HIERARCHY_MASK_SLAVE_REMOVED |
1121	XCB_INPUT_HIERARCHY_MASK_SLAVE_ADDED))
1122	xi2SetupDevices();
1123	}
1124
1125	#if QT_XCB_HAS_TOUCHPAD_GESTURES
1126	void QXcbConnection::xi2HandleGesturePinchEvent(void *event)
1127	{
1128	auto *xiEvent = reinterpret_cast<qt_xcb_input_pinch_event_t *>(event);
1129
1130	if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled())) {
1131	qCDebug(lcQpaXInputEvents, "XI2 gesture event type %d seq %d fingers %d pos %6.1f, "
1132	"%6.1f root pos %6.1f, %6.1f delta_angle %6.1f scale %6.1f on window %x",
1133	xiEvent->event_type, xiEvent->sequence, xiEvent->detail,
1134	fixed1616ToReal(xiEvent->event_x), fixed1616ToReal(xiEvent->event_y),
1135	fixed1616ToReal(xiEvent->root_x), fixed1616ToReal(xiEvent->root_y),
1136	fixed1616ToReal(xiEvent->delta_angle), fixed1616ToReal(xiEvent->scale),
1137	xiEvent->event);
1138	}
1139	QXcbWindow *platformWindow = platformWindowFromId(id: xiEvent->event);
1140	if (!platformWindow)
1141	return;
1142
1143	setTime(xiEvent->time);
1144
1145	TouchDeviceData *dev = touchDeviceForId(id: xiEvent->sourceid);
1146	Q_ASSERT(dev);
1147
1148	uint32_t fingerCount = xiEvent->detail;
1149
1150	switch (xiEvent->event_type) {
1151	case XCB_INPUT_GESTURE_PINCH_BEGIN:
1152	// Gestures must be accepted when we are grabbing gesture events. Otherwise the entire
1153	// sequence will get replayed when the grab ends.
1154	if (m_xiGrab) {
1155	xcb_input_xi_allow_events(c: xcb_connection(), XCB_CURRENT_TIME, deviceid: xiEvent->deviceid,
1156	event_mode: XCB_INPUT_EVENT_MODE_ASYNC_DEVICE, touchid: 0, grab_window: xiEvent->event);
1157	}
1158	m_lastPinchScale = 1.0;
1159	QWindowSystemInterface::handleGestureEvent(window: platformWindow->window(), timestamp: xiEvent->time,
1160	device: dev->qtTouchDevice,
1161	type: Qt::BeginNativeGesture,
1162	local: platformWindow->lastPointerPosition(),
1163	global: platformWindow->lastPointerGlobalPosition(),
1164	fingerCount);
1165	break;
1166
1167	case XCB_INPUT_GESTURE_PINCH_UPDATE: {
1168	qreal rotationDelta = fixed1616ToReal(val: xiEvent->delta_angle);
1169	qreal scale = fixed1616ToReal(val: xiEvent->scale);
1170	qreal scaleDelta = scale - m_lastPinchScale;
1171	m_lastPinchScale = scale;
1172
1173	QPointF delta = QPointF(fixed1616ToReal(val: xiEvent->delta_x),
1174	fixed1616ToReal(val: xiEvent->delta_y));
1175
1176	if (!delta.isNull()) {
1177	QWindowSystemInterface::handleGestureEventWithValueAndDelta(
1178	window: platformWindow->window(), timestamp: xiEvent->time, device: dev->qtTouchDevice,
1179	type: Qt::PanNativeGesture, value: 0, delta,
1180	local: platformWindow->lastPointerPosition(),
1181	global: platformWindow->lastPointerGlobalPosition(),
1182	fingerCount);
1183	}
1184	if (rotationDelta != 0) {
1185	QWindowSystemInterface::handleGestureEventWithRealValue(
1186	window: platformWindow->window(), timestamp: xiEvent->time, device: dev->qtTouchDevice,
1187	type: Qt::RotateNativeGesture,
1188	value: rotationDelta,
1189	local: platformWindow->lastPointerPosition(),
1190	global: platformWindow->lastPointerGlobalPosition(),
1191	fingerCount);
1192	}
1193	if (scaleDelta != 0) {
1194	QWindowSystemInterface::handleGestureEventWithRealValue(
1195	window: platformWindow->window(), timestamp: xiEvent->time, device: dev->qtTouchDevice,
1196	type: Qt::ZoomNativeGesture,
1197	value: scaleDelta,
1198	local: platformWindow->lastPointerPosition(),
1199	global: platformWindow->lastPointerGlobalPosition(),
1200	fingerCount);
1201	}
1202	break;
1203	}
1204	case XCB_INPUT_GESTURE_PINCH_END:
1205	QWindowSystemInterface::handleGestureEvent(window: platformWindow->window(), timestamp: xiEvent->time,
1206	device: dev->qtTouchDevice,
1207	type: Qt::EndNativeGesture,
1208	local: platformWindow->lastPointerPosition(),
1209	global: platformWindow->lastPointerGlobalPosition(),
1210	fingerCount);
1211	break;
1212	}
1213	}
1214
1215	void QXcbConnection::xi2HandleGestureSwipeEvent(void *event)
1216	{
1217	auto *xiEvent = reinterpret_cast<qt_xcb_input_swipe_event_t *>(event);
1218
1219	if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled())) {
1220	qCDebug(lcQpaXInputEvents, "XI2 gesture event type %d seq %d detail %d pos %6.1f, %6.1f root pos %6.1f, %6.1f on window %x",
1221	xiEvent->event_type, xiEvent->sequence, xiEvent->detail,
1222	fixed1616ToReal(xiEvent->event_x), fixed1616ToReal(xiEvent->event_y),
1223	fixed1616ToReal(xiEvent->root_x), fixed1616ToReal(xiEvent->root_y),
1224	xiEvent->event);
1225	}
1226	QXcbWindow *platformWindow = platformWindowFromId(id: xiEvent->event);
1227	if (!platformWindow)
1228	return;
1229
1230	setTime(xiEvent->time);
1231
1232	TouchDeviceData *dev = touchDeviceForId(id: xiEvent->sourceid);
1233	Q_ASSERT(dev);
1234
1235	uint32_t fingerCount = xiEvent->detail;
1236
1237	switch (xiEvent->event_type) {
1238	case XCB_INPUT_GESTURE_SWIPE_BEGIN:
1239	// Gestures must be accepted when we are grabbing gesture events. Otherwise the entire
1240	// sequence will get replayed when the grab ends.
1241	if (m_xiGrab) {
1242	xcb_input_xi_allow_events(c: xcb_connection(), XCB_CURRENT_TIME, deviceid: xiEvent->deviceid,
1243	event_mode: XCB_INPUT_EVENT_MODE_ASYNC_DEVICE, touchid: 0, grab_window: xiEvent->event);
1244	}
1245	QWindowSystemInterface::handleGestureEvent(window: platformWindow->window(), timestamp: xiEvent->time,
1246	device: dev->qtTouchDevice,
1247	type: Qt::BeginNativeGesture,
1248	local: platformWindow->lastPointerPosition(),
1249	global: platformWindow->lastPointerGlobalPosition(),
1250	fingerCount);
1251	break;
1252	case XCB_INPUT_GESTURE_SWIPE_UPDATE: {
1253	QPointF delta = QPointF(fixed1616ToReal(val: xiEvent->delta_x),
1254	fixed1616ToReal(val: xiEvent->delta_y));
1255
1256	if (xiEvent->delta_x != 0 || xiEvent->delta_y != 0) {
1257	QWindowSystemInterface::handleGestureEventWithValueAndDelta(
1258	window: platformWindow->window(), timestamp: xiEvent->time, device: dev->qtTouchDevice,
1259	type: Qt::PanNativeGesture, value: 0, delta,
1260	local: platformWindow->lastPointerPosition(),
1261	global: platformWindow->lastPointerGlobalPosition(),
1262	fingerCount);
1263	}
1264	break;
1265	}
1266	case XCB_INPUT_GESTURE_SWIPE_END:
1267	QWindowSystemInterface::handleGestureEvent(window: platformWindow->window(), timestamp: xiEvent->time,
1268	device: dev->qtTouchDevice,
1269	type: Qt::EndNativeGesture,
1270	local: platformWindow->lastPointerPosition(),
1271	global: platformWindow->lastPointerGlobalPosition(),
1272	fingerCount);
1273	break;
1274	}
1275	}
1276
1277	#else // QT_XCB_HAS_TOUCHPAD_GESTURES
1278	void QXcbConnection::xi2HandleGesturePinchEvent(void*) {}
1279	void QXcbConnection::xi2HandleGestureSwipeEvent(void*) {}
1280	#endif
1281
1282	void QXcbConnection::xi2HandleDeviceChangedEvent(void *event)
1283	{
1284	auto *xiEvent = reinterpret_cast<xcb_input_device_changed_event_t *>(event);
1285	switch (xiEvent->reason) {
1286	case XCB_INPUT_CHANGE_REASON_DEVICE_CHANGE: {
1287	// Don't call xi2SetupSlavePointerDevice() again for an already-known device, and never for a master.
1288	if (m_xiMasterPointerIds.contains(t: xiEvent->deviceid) || m_xiSlavePointerIds.contains(t: xiEvent->deviceid))
1289	return;
1290	auto reply = Q_XCB_REPLY(xcb_input_xi_query_device, xcb_connection(), xiEvent->sourceid);
1291	if (!reply || reply->num_infos <= 0)
1292	return;
1293	auto it = xcb_input_xi_query_device_infos_iterator(R: reply.get());
1294	xi2SetupSlavePointerDevice(info: it.data);
1295	break;
1296	}
1297	case XCB_INPUT_CHANGE_REASON_SLAVE_SWITCH: {
1298	if (auto *scrollingDevice = scrollingDeviceForId(id: xiEvent->sourceid))
1299	xi2UpdateScrollingDevice(scrollingDevice);
1300	break;
1301	}
1302	default:
1303	qCDebug(lcQpaXInputEvents, "unknown device-changed-event (device %d)", xiEvent->sourceid);
1304	break;
1305	}
1306	}
1307
1308	void QXcbConnection::xi2UpdateScrollingDevice(QInputDevice *dev)
1309	{
1310	QXcbScrollingDevice *scrollDev = qobject_cast<QXcbScrollingDevice *>(object: dev);
1311	if (!scrollDev || !scrollDev->capabilities().testFlag(flag: QInputDevice::Capability::Scroll))
1312	return;
1313	QXcbScrollingDevicePrivate *scrollingDevice = QXcbScrollingDevice::get(q: scrollDev);
1314
1315	auto reply = Q_XCB_REPLY(xcb_input_xi_query_device, xcb_connection(), scrollingDevice->systemId);
1316	if (!reply || reply->num_infos <= 0) {
1317	qCDebug(lcQpaInputDevices, "scrolling device %lld no longer present", scrollingDevice->systemId);
1318	return;
1319	}
1320	QPointF lastScrollPosition;
1321	if (lcQpaXInputEvents().isDebugEnabled())
1322	lastScrollPosition = scrollingDevice->lastScrollPosition;
1323
1324	xcb_input_xi_device_info_t *deviceInfo = xcb_input_xi_query_device_infos_iterator(R: reply.get()).data;
1325	auto classes_it = xcb_input_xi_device_info_classes_iterator(R: deviceInfo);
1326	for (; classes_it.rem; xcb_input_device_class_next(i: &classes_it)) {
1327	xcb_input_device_class_t *classInfo = classes_it.data;
1328	if (classInfo->type == XCB_INPUT_DEVICE_CLASS_TYPE_VALUATOR) {
1329	auto *vci = reinterpret_cast<xcb_input_valuator_class_t *>(classInfo);
1330	const int valuatorAtom = qatom(atom: vci->label);
1331	if (valuatorAtom == QXcbAtom::AtomRelHorizScroll || valuatorAtom == QXcbAtom::AtomRelHorizWheel)
1332	scrollingDevice->lastScrollPosition.setX(fixed3232ToReal(val: vci->value));
1333	else if (valuatorAtom == QXcbAtom::AtomRelVertScroll || valuatorAtom == QXcbAtom::AtomRelVertWheel)
1334	scrollingDevice->lastScrollPosition.setY(fixed3232ToReal(val: vci->value));
1335	}
1336	}
1337	if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled() && lastScrollPosition != scrollingDevice->lastScrollPosition))
1338	qCDebug(lcQpaXInputEvents, "scrolling device %lld moved from (%f, %f) to (%f, %f)", scrollingDevice->systemId,
1339	lastScrollPosition.x(), lastScrollPosition.y(),
1340	scrollingDevice->lastScrollPosition.x(),
1341	scrollingDevice->lastScrollPosition.y());
1342	}
1343
1344	void QXcbConnection::xi2UpdateScrollingDevices()
1345	{
1346	const auto &devices = QInputDevice::devices();
1347	for (const QInputDevice *dev : devices) {
1348	if (dev->capabilities().testFlag(flag: QInputDevice::Capability::Scroll))
1349	xi2UpdateScrollingDevice(dev: const_cast<QInputDevice *>(dev));
1350	}
1351	}
1352
1353	QXcbScrollingDevice *QXcbConnection::scrollingDeviceForId(int id)
1354	{
1355	const QPointingDevice *dev = QPointingDevicePrivate::pointingDeviceById(systemId: id);
1356	if (!dev|| !dev->capabilities().testFlag(flag: QInputDevice::Capability::Scroll))
1357	return nullptr;
1358	return qobject_cast<QXcbScrollingDevice *>(object: const_cast<QPointingDevice *>(dev));
1359	}
1360
1361	void QXcbConnection::xi2HandleScrollEvent(void *event, const QPointingDevice *dev)
1362	{
1363	auto *xiDeviceEvent = reinterpret_cast<qt_xcb_input_device_event_t *>(event);
1364
1365	const QXcbScrollingDevice *scrollDev = qobject_cast<const QXcbScrollingDevice *>(object: dev);
1366	if (!scrollDev || !scrollDev->capabilities().testFlag(flag: QInputDevice::Capability::Scroll))
1367	return;
1368	const QXcbScrollingDevicePrivate *scrollingDevice = QXcbScrollingDevice::get(q: scrollDev);
1369
1370	if (xiDeviceEvent->event_type == XCB_INPUT_MOTION && scrollingDevice->orientations) {
1371	if (QXcbWindow *platformWindow = platformWindowFromId(id: xiDeviceEvent->event)) {
1372	QPoint rawDelta;
1373	QPoint angleDelta;
1374	double value;
1375	if (scrollingDevice->orientations & Qt::Vertical) {
1376	if (xi2GetValuatorValueIfSet(event: xiDeviceEvent, valuatorNum: scrollingDevice->verticalIndex, value: &value)) {
1377	double delta = scrollingDevice->lastScrollPosition.y() - value;
1378	scrollingDevice->lastScrollPosition.setY(value);
1379	angleDelta.setY((delta / scrollingDevice->verticalIncrement) * 120);
1380	// With most drivers the increment is 1 for wheels.
1381	// For libinput it is hardcoded to a useless 15.
1382	// For a proper touchpad driver it should be in the same order of magnitude as 120
1383	if (scrollingDevice->verticalIncrement > 15)
1384	rawDelta.setY(delta);
1385	else if (scrollingDevice->verticalIncrement < -15)
1386	rawDelta.setY(-delta);
1387	}
1388	}
1389	if (scrollingDevice->orientations & Qt::Horizontal) {
1390	if (xi2GetValuatorValueIfSet(event: xiDeviceEvent, valuatorNum: scrollingDevice->horizontalIndex, value: &value)) {
1391	double delta = scrollingDevice->lastScrollPosition.x() - value;
1392	scrollingDevice->lastScrollPosition.setX(value);
1393	angleDelta.setX((delta / scrollingDevice->horizontalIncrement) * 120);
1394	// See comment under vertical
1395	if (scrollingDevice->horizontalIncrement > 15)
1396	rawDelta.setX(delta);
1397	else if (scrollingDevice->horizontalIncrement < -15)
1398	rawDelta.setX(-delta);
1399	}
1400	}
1401	if (!angleDelta.isNull()) {
1402	QPoint local(fixed1616ToReal(val: xiDeviceEvent->event_x), fixed1616ToReal(val: xiDeviceEvent->event_y));
1403	QPoint global(fixed1616ToReal(val: xiDeviceEvent->root_x), fixed1616ToReal(val: xiDeviceEvent->root_y));
1404	Qt::KeyboardModifiers modifiers = keyboard()->translateModifiers(s: xiDeviceEvent->mods.effective);
1405	if (modifiers & Qt::AltModifier) {
1406	angleDelta = angleDelta.transposed();
1407	rawDelta = rawDelta.transposed();
1408	}
1409	qCDebug(lcQpaXInputEvents) << "scroll wheel from device" << scrollingDevice->systemId
1410	<< "@ window pos" << local << "delta px" << rawDelta << "angle" << angleDelta;
1411	QWindowSystemInterface::handleWheelEvent(window: platformWindow->window(), timestamp: xiDeviceEvent->time, device: dev,
1412	local, global, pixelDelta: rawDelta, angleDelta, mods: modifiers);
1413	}
1414	}
1415	} else if (xiDeviceEvent->event_type == XCB_INPUT_BUTTON_RELEASE && scrollingDevice->legacyOrientations) {
1416	if (QXcbWindow *platformWindow = platformWindowFromId(id: xiDeviceEvent->event)) {
1417	QPoint angleDelta;
1418	if (scrollingDevice->legacyOrientations & Qt::Vertical) {
1419	if (xiDeviceEvent->detail == 4)
1420	angleDelta.setY(120);
1421	else if (xiDeviceEvent->detail == 5)
1422	angleDelta.setY(-120);
1423	}
1424	if (scrollingDevice->legacyOrientations & Qt::Horizontal) {
1425	if (xiDeviceEvent->detail == 6)
1426	angleDelta.setX(120);
1427	else if (xiDeviceEvent->detail == 7)
1428	angleDelta.setX(-120);
1429	}
1430	if (!angleDelta.isNull()) {
1431	QPoint local(fixed1616ToReal(val: xiDeviceEvent->event_x), fixed1616ToReal(val: xiDeviceEvent->event_y));
1432	QPoint global(fixed1616ToReal(val: xiDeviceEvent->root_x), fixed1616ToReal(val: xiDeviceEvent->root_y));
1433	Qt::KeyboardModifiers modifiers = keyboard()->translateModifiers(s: xiDeviceEvent->mods.effective);
1434	if (modifiers & Qt::AltModifier)
1435	angleDelta = angleDelta.transposed();
1436	qCDebug(lcQpaXInputEvents) << "scroll wheel (button" << xiDeviceEvent->detail << ") @ window pos" << local << "delta angle" << angleDelta;
1437	QWindowSystemInterface::handleWheelEvent(window: platformWindow->window(), timestamp: xiDeviceEvent->time, device: dev,
1438	local, global, pixelDelta: QPoint(), angleDelta, mods: modifiers);
1439	}
1440	}
1441	}
1442	}
1443
1444	static int xi2ValuatorOffset(const unsigned char *maskPtr, int maskLen, int number)
1445	{
1446	int offset = 0;
1447	for (int i = 0; i < maskLen; i++) {
1448	if (number < 8) {
1449	if ((maskPtr[i] & (1 << number)) == 0)
1450	return -1;
1451	}
1452	for (int j = 0; j < 8; j++) {
1453	if (j == number)
1454	return offset;
1455	if (maskPtr[i] & (1 << j))
1456	offset++;
1457	}
1458	number -= 8;
1459	}
1460	return -1;
1461	}
1462
1463	bool QXcbConnection::xi2GetValuatorValueIfSet(const void *event, int valuatorNum, double *value)
1464	{
1465	auto *xideviceevent = static_cast<const qt_xcb_input_device_event_t *>(event);
1466	auto *buttonsMaskAddr = reinterpret_cast<const unsigned char *>(&xideviceevent[1]);
1467	auto *valuatorsMaskAddr = buttonsMaskAddr + xideviceevent->buttons_len * 4;
1468	auto *valuatorsValuesAddr = reinterpret_cast<const xcb_input_fp3232_t *>(valuatorsMaskAddr + xideviceevent->valuators_len * 4);
1469
1470	int valuatorOffset = xi2ValuatorOffset(maskPtr: valuatorsMaskAddr, maskLen: xideviceevent->valuators_len, number: valuatorNum);
1471	if (valuatorOffset < 0)
1472	return false;
1473
1474	*value = valuatorsValuesAddr[valuatorOffset].integral;
1475	*value += ((double)valuatorsValuesAddr[valuatorOffset].frac / (1 << 16) / (1 << 16));
1476	return true;
1477	}
1478
1479	Qt::MouseButton QXcbConnection::xiToQtMouseButton(uint32_t b)
1480	{
1481	switch (b) {
1482	case 1: return Qt::LeftButton;
1483	case 2: return Qt::MiddleButton;
1484	case 3: return Qt::RightButton;
1485	// 4-7 are for scrolling
1486	default: break;
1487	}
1488	if (b >= 8 && b <= Qt::MaxMouseButton)
1489	return static_cast<Qt::MouseButton>(Qt::BackButton << (b - 8));
1490	return Qt::NoButton;
1491	}
1492
1493	#if QT_CONFIG(tabletevent)
1494	bool QXcbConnection::xi2HandleTabletEvent(const void *event, TabletData *tabletData)
1495	{
1496	bool handled = true;
1497	const auto *xiDeviceEvent = reinterpret_cast<const qt_xcb_input_device_event_t *>(event);
1498
1499	switch (xiDeviceEvent->event_type) {
1500	case XCB_INPUT_BUTTON_PRESS: {
1501	Qt::MouseButton b = xiToQtMouseButton(b: xiDeviceEvent->detail);
1502	tabletData->buttons |= b;
1503	xi2ReportTabletEvent(event, tabletData);
1504	break;
1505	}
1506	case XCB_INPUT_BUTTON_RELEASE: {
1507	Qt::MouseButton b = xiToQtMouseButton(b: xiDeviceEvent->detail);
1508	tabletData->buttons ^= b;
1509	xi2ReportTabletEvent(event, tabletData);
1510	break;
1511	}
1512	case XCB_INPUT_MOTION:
1513	xi2ReportTabletEvent(event, tabletData);
1514	break;
1515	case XCB_INPUT_PROPERTY: {
1516	// This is the wacom driver's way of reporting tool proximity.
1517	// The evdev driver doesn't do it this way.
1518	const auto *ev = reinterpret_cast<const xcb_input_property_event_t *>(event);
1519	if (ev->what == XCB_INPUT_PROPERTY_FLAG_MODIFIED) {
1520	if (ev->property == atom(qatom: QXcbAtom::AtomWacomSerialIDs)) {
1521	enum WacomSerialIndex {
1522	_WACSER_USB_ID = 0,
1523	_WACSER_LAST_TOOL_SERIAL,
1524	_WACSER_LAST_TOOL_ID,
1525	_WACSER_TOOL_SERIAL,
1526	_WACSER_TOOL_ID,
1527	_WACSER_COUNT
1528	};
1529
1530	auto reply = Q_XCB_REPLY(xcb_input_xi_get_property, xcb_connection(), tabletData->deviceId, 0,
1531	ev->property, XCB_GET_PROPERTY_TYPE_ANY, 0, 100);
1532	if (reply) {
1533	if (reply->type == atom(qatom: QXcbAtom::AtomINTEGER) && reply->format == 32 && reply->num_items == _WACSER_COUNT) {
1534	quint32 *ptr = reinterpret_cast<quint32 *>(xcb_input_xi_get_property_items(R: reply.get()));
1535	quint32 tool = ptr[_WACSER_TOOL_ID];
1536	// Workaround for http://sourceforge.net/p/linuxwacom/bugs/246/
1537	// e.g. on Thinkpad Helix, tool ID will be 0 and serial will be 1
1538	if (!tool && ptr[_WACSER_TOOL_SERIAL])
1539	tool = ptr[_WACSER_TOOL_SERIAL];
1540
1541	QWindow *win = nullptr; // TODO QTBUG-111400 get the position somehow, then the window
1542	// The property change event informs us which tool is in proximity or which one left proximity.
1543	if (tool) {
1544	const QPointingDevice *dev = tabletToolInstance(master: nullptr, tabletName: tabletData->name,
1545	id: tabletData->deviceId, usbId: ptr[_WACSER_USB_ID], toolId: tool,
1546	uniqueId: qint64(ptr[_WACSER_TOOL_SERIAL])); // TODO look up the master
1547	tabletData->inProximity = true;
1548	tabletData->tool = dev->type();
1549	tabletData->serialId = qint64(ptr[_WACSER_TOOL_SERIAL]);
1550	QWindowSystemInterface::handleTabletEnterLeaveProximityEvent(window: win, timestamp: ev->time, device: dev, inProximity: true); // enter
1551	} else {
1552	tool = ptr[_WACSER_LAST_TOOL_ID];
1553	// Workaround for http://sourceforge.net/p/linuxwacom/bugs/246/
1554	// e.g. on Thinkpad Helix, tool ID will be 0 and serial will be 1
1555	if (!tool)
1556	tool = ptr[_WACSER_LAST_TOOL_SERIAL];
1557	auto *dev = qobject_cast<const QPointingDevice *>(object: QInputDevicePrivate::fromId(systemId: tabletData->deviceId));
1558	Q_ASSERT(dev);
1559	tabletData->tool = dev->type();
1560	tabletData->inProximity = false;
1561	tabletData->serialId = qint64(ptr[_WACSER_LAST_TOOL_SERIAL]);
1562	QWindowSystemInterface::handleTabletEnterLeaveProximityEvent(window: win, timestamp: ev->time, device: dev, inProximity: false); // leave
1563	}
1564	// TODO maybe have a hash of tabletData->deviceId to device data so we can
1565	// look up the tablet name here, and distinguish multiple tablets
1566	qCDebug(lcQpaInputDevices, "XI2 proximity change on tablet %d %s (USB %x): last tool: %x id %x current tool: %x id %x %s",
1567	tabletData->deviceId, qPrintable(tabletData->name), ptr[_WACSER_USB_ID],
1568	ptr[_WACSER_LAST_TOOL_SERIAL], ptr[_WACSER_LAST_TOOL_ID],
1569	ptr[_WACSER_TOOL_SERIAL], ptr[_WACSER_TOOL_ID], toolName(tabletData->tool));
1570	}
1571	}
1572	}
1573	}
1574	break;
1575	}
1576	default:
1577	handled = false;
1578	break;
1579	}
1580
1581	return handled;
1582	}
1583
1584	inline qreal scaleOneValuator(qreal normValue, qreal screenMin, qreal screenSize)
1585	{
1586	return screenMin + normValue * screenSize;
1587	}
1588
1589	// TODO QPointingDevice not TabletData
1590	void QXcbConnection::xi2ReportTabletEvent(const void *event, TabletData *tabletData)
1591	{
1592	auto *ev = reinterpret_cast<const qt_xcb_input_device_event_t *>(event);
1593	QXcbWindow *xcbWindow = platformWindowFromId(id: ev->event);
1594	if (!xcbWindow)
1595	return;
1596	QWindow *window = xcbWindow->window();
1597	const Qt::KeyboardModifiers modifiers = keyboard()->translateModifiers(s: ev->mods.effective);
1598	QPointF local(fixed1616ToReal(val: ev->event_x), fixed1616ToReal(val: ev->event_y));
1599	QPointF global(fixed1616ToReal(val: ev->root_x), fixed1616ToReal(val: ev->root_y));
1600	double pressure = 0, rotation = 0, tangentialPressure = 0;
1601	int xTilt = 0, yTilt = 0;
1602	static const bool useValuators = !qEnvironmentVariableIsSet(varName: "QT_XCB_TABLET_LEGACY_COORDINATES");
1603	const QPointingDevice *dev = QPointingDevicePrivate::tabletDevice(deviceType: QInputDevice::DeviceType(tabletData->tool),
1604	pointerType: QPointingDevice::PointerType(tabletData->pointerType),
1605	uniqueId: QPointingDeviceUniqueId::fromNumericId(id: tabletData->serialId));
1606
1607	// Valuators' values are relative to the physical size of the current virtual
1608	// screen. Therefore we cannot use QScreen/QWindow geometry and should use
1609	// QPlatformWindow/QPlatformScreen instead.
1610	QRect physicalScreenArea;
1611	if (Q_LIKELY(useValuators)) {
1612	const QList<QPlatformScreen *> siblings = window->screen()->handle()->virtualSiblings();
1613	for (const QPlatformScreen *screen : siblings)
1614	physicalScreenArea |= screen->geometry();
1615	}
1616
1617	for (QHash<int, TabletData::ValuatorClassInfo>::iterator it = tabletData->valuatorInfo.begin(),
1618	ite = tabletData->valuatorInfo.end(); it != ite; ++it) {
1619	int valuator = it.key();
1620	TabletData::ValuatorClassInfo &classInfo(it.value());
1621	xi2GetValuatorValueIfSet(event, valuatorNum: classInfo.number, value: &classInfo.curVal);
1622	double normalizedValue = (classInfo.curVal - classInfo.minVal) / (classInfo.maxVal - classInfo.minVal);
1623	switch (valuator) {
1624	case QXcbAtom::AtomAbsX:
1625	if (Q_LIKELY(useValuators)) {
1626	const qreal value = scaleOneValuator(normValue: normalizedValue, screenMin: physicalScreenArea.x(), screenSize: physicalScreenArea.width());
1627	global.setX(value);
1628	local.setX(xcbWindow->mapFromGlobalF(pos: global).x());
1629	}
1630	break;
1631	case QXcbAtom::AtomAbsY:
1632	if (Q_LIKELY(useValuators)) {
1633	qreal value = scaleOneValuator(normValue: normalizedValue, screenMin: physicalScreenArea.y(), screenSize: physicalScreenArea.height());
1634	global.setY(value);
1635	local.setY(xcbWindow->mapFromGlobalF(pos: global).y());
1636	}
1637	break;
1638	case QXcbAtom::AtomAbsPressure:
1639	pressure = normalizedValue;
1640	break;
1641	case QXcbAtom::AtomAbsTiltX:
1642	xTilt = classInfo.curVal;
1643	break;
1644	case QXcbAtom::AtomAbsTiltY:
1645	yTilt = classInfo.curVal;
1646	break;
1647	case QXcbAtom::AtomAbsWheel:
1648	switch (tabletData->tool) {
1649	case QInputDevice::DeviceType::Airbrush:
1650	tangentialPressure = normalizedValue * 2.0 - 1.0; // Convert 0..1 range to -1..+1 range
1651	break;
1652	case QInputDevice::DeviceType::Stylus:
1653	if (dev->capabilities().testFlag(flag: QInputDevice::Capability::Rotation))
1654	rotation = normalizedValue * 360.0 - 180.0; // Convert 0..1 range to -180..+180 degrees
1655	break;
1656	default: // Other types of styli do not use this valuator
1657	break;
1658	}
1659	break;
1660	default:
1661	break;
1662	}
1663	}
1664
1665	if (Q_UNLIKELY(lcQpaXInputEvents().isDebugEnabled()))
1666	qCDebug(lcQpaXInputEvents, "XI2 event on tablet %d with tool %s %llx type %s seq %d detail %d time %d "
1667	"pos %6.1f, %6.1f root pos %6.1f, %6.1f buttons 0x%x pressure %4.2lf tilt %d, %d rotation %6.2lf modifiers 0x%x",
1668	tabletData->deviceId, toolName(tabletData->tool), tabletData->serialId, pointerTypeName(tabletData->pointerType),
1669	ev->sequence, ev->detail, ev->time,
1670	local.x(), local.y(), global.x(), global.y(),
1671	(int)tabletData->buttons, pressure, xTilt, yTilt, rotation, (int)modifiers);
1672
1673	QWindowSystemInterface::handleTabletEvent(window, timestamp: ev->time, device: dev, local, global,
1674	buttons: tabletData->buttons, pressure,
1675	xTilt, yTilt, tangentialPressure,
1676	rotation, z: 0, modifiers);
1677	}
1678
1679	QXcbConnection::TabletData *QXcbConnection::tabletDataForDevice(int id)
1680	{
1681	for (int i = 0; i < m_tabletData.size(); ++i) {
1682	if (m_tabletData.at(i).deviceId == id)
1683	return &m_tabletData[i];
1684	}
1685	return nullptr;
1686	}
1687
1688	#endif // QT_CONFIG(tabletevent)
1689