qevdevmousehandler.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2015 The Qt Company Ltd.-
4** Contact: http://www.qt.io/licensing/-
5**-
6** This file is part of the QtGui module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL21$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
11** accordance with the commercial license agreement provided with the-
12** Software or, alternatively, in accordance with the terms contained in-
13** a written agreement between you and The Qt Company. For licensing terms-
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15** information use the contact form at http://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 2.1 or version 3 as published by the Free-
20** Software Foundation and appearing in the file LICENSE.LGPLv21 and-
21** LICENSE.LGPLv3 included in the packaging of this file. Please review the-
22** following information to ensure the GNU Lesser General Public License-
23** requirements will be met: https://www.gnu.org/licenses/lgpl.html and-
24** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.-
25**-
26** As a special exception, The Qt Company gives you certain additional-
27** rights. These rights are described in The Qt Company LGPL Exception-
28** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.-
29**-
30** $QT_END_LICENSE$-
31**-
32****************************************************************************/-
33-
34#include "qevdevmousehandler_p.h"-
35-
36#include <QSocketNotifier>-
37#include <QStringList>-
38#include <QPoint>-
39#include <QGuiApplication>-
40#include <QScreen>-
41#include <QLoggingCategory>-
42#include <qpa/qwindowsysteminterface.h>-
43-
44#include <qplatformdefs.h>-
45#include <private/qcore_unix_p.h> // overrides QT_OPEN-
46#include <private/qhighdpiscaling_p.h>-
47-
48#include <errno.h>-
49-
50#include <linux/kd.h>-
51#include <linux/input.h>-
52-
53#define TEST_BIT(array, bit) (array[bit/8] & (1<<(bit%8)))-
54-
55QT_BEGIN_NAMESPACE-
56-
57Q_LOGGING_CATEGORY(qLcEvdevMouse, "qt.qpa.input")
never executed: return category;
0
58-
59QEvdevMouseHandler *QEvdevMouseHandler::create(const QString &device, const QString &specification)-
60{-
61 qCDebug(qLcEvdevMouse) << "create mouse handler for" << device << specification;
never executed: QMessageLogger(__FILE__, 61, __PRETTY_FUNCTION__, qLcEvdevMouse().categoryName()).debug() << "create mouse handler for" << device << specification;
qt_category_enabledDescription
TRUEnever evaluated
FALSEnever evaluated
0
62-
63 bool compression = true;-
64 int jitterLimit = 0;-
65 int grab = 0;-
66 bool abs = false;-
67-
68 QStringList args = specification.split(QLatin1Char(':'));-
69 foreach (const QString &arg, args) {-
70 if (arg == QLatin1String("nocompress"))
arg == QLatin1...("nocompress")Description
TRUEnever evaluated
FALSEnever evaluated
0
71 compression = false;
never executed: compression = false;
0
72 else if (arg.startsWith(QLatin1String("dejitter=")))
arg.startsWith...("dejitter="))Description
TRUEnever evaluated
FALSEnever evaluated
0
73 jitterLimit = arg.mid(9).toInt();
never executed: jitterLimit = arg.mid(9).toInt();
0
74 else if (arg.startsWith(QLatin1String("grab=")))
arg.startsWith...ring("grab="))Description
TRUEnever evaluated
FALSEnever evaluated
0
75 grab = arg.mid(5).toInt();
never executed: grab = arg.mid(5).toInt();
0
76 else if (arg == QLatin1String("abs"))
arg == QLatin1String("abs")Description
TRUEnever evaluated
FALSEnever evaluated
0
77 abs = true;
never executed: abs = true;
0
78 }
never executed: end of block
0
79-
80 int fd;-
81 fd = qt_safe_open(device.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);-
82 if (fd >= 0) {
fd >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
83 ::ioctl(fd, EVIOCGRAB, grab);-
84 return new QEvdevMouseHandler(device, fd, abs, compression, jitterLimit);
never executed: return new QEvdevMouseHandler(device, fd, abs, compression, jitterLimit);
0
85 } else {-
86 qErrnoWarning(errno, "Cannot open mouse input device %s", qPrintable(device));-
87 return 0;
never executed: return 0;
0
88 }-
89}-
90-
91QEvdevMouseHandler::QEvdevMouseHandler(const QString &device, int fd, bool abs, bool compression, int jitterLimit)-
92 : m_device(device), m_fd(fd), m_notify(0), m_x(0), m_y(0), m_prevx(0), m_prevy(0),-
93 m_abs(abs), m_compression(compression), m_buttons(0), m_prevInvalid(true)-
94{-
95 setObjectName(QLatin1String("Evdev Mouse Handler"));-
96-
97 m_jitterLimitSquared = jitterLimit * jitterLimit;-
98-
99 // Some touch screens present as mice with absolute coordinates.-
100 // These can not be differentiated from touchpads, so supplying abs to QT_QPA_EVDEV_MOUSE_PARAMETERS-
101 // will force qevdevmousehandler to treat the coordinates as absolute, scaled to the hardware maximums.-
102 // Turning this on will not affect mice as these do not report in absolute coordinates-
103 // but will make touchpads act like touch screens-
104 if (m_abs)
m_absDescription
TRUEnever evaluated
FALSEnever evaluated
0
105 m_abs = getHardwareMaximum();
never executed: m_abs = getHardwareMaximum();
0
106-
107 // socket notifier for events on the mouse device-
108 m_notify = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);-
109 connect(m_notify, SIGNAL(activated(int)), this, SLOT(readMouseData()));-
110}
never executed: end of block
0
111-
112QEvdevMouseHandler::~QEvdevMouseHandler()-
113{-
114 if (m_fd >= 0)
m_fd >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
115 qt_safe_close(m_fd);
never executed: qt_safe_close(m_fd);
0
116}
never executed: end of block
0
117-
118// Ask touch screen hardware for information on coordinate maximums-
119// If any ioctls fail, revert to non abs mode-
120bool QEvdevMouseHandler::getHardwareMaximum()-
121{-
122 unsigned char absFeatures[(ABS_MAX / 8) + 1];-
123 memset(absFeatures, '\0', sizeof (absFeatures));-
124-
125 // test if ABS_X, ABS_Y are available-
126 if (ioctl(m_fd, EVIOCGBIT(EV_ABS, sizeof (absFeatures)), absFeatures) == -1)
ioctl(m_fd, ((...eatures) == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
127 return false;
never executed: return false;
0
128-
129 if ((!TEST_BIT(absFeatures, ABS_X)) || (!TEST_BIT(absFeatures, ABS_Y)))
(!(absFeatures...1<<(0x00%8))))Description
TRUEnever evaluated
FALSEnever evaluated
(!(absFeatures...1<<(0x01%8))))Description
TRUEnever evaluated
FALSEnever evaluated
0
130 return false;
never executed: return false;
0
131-
132 // ask hardware for minimum and maximum values-
133 struct input_absinfo absInfo;-
134 if (ioctl(m_fd, EVIOCGABS(ABS_X), &absInfo) == -1)
ioctl(m_fd, ((...absInfo) == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
135 return false;
never executed: return false;
0
136-
137 m_hardwareWidth = absInfo.maximum - absInfo.minimum;-
138-
139 if (ioctl(m_fd, EVIOCGABS(ABS_Y), &absInfo) == -1)
ioctl(m_fd, ((...absInfo) == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
140 return false;
never executed: return false;
0
141-
142 m_hardwareHeight = absInfo.maximum - absInfo.minimum;-
143-
144 QScreen *primaryScreen = QGuiApplication::primaryScreen();-
145 QRect g = QHighDpi::toNativePixels(primaryScreen->virtualGeometry(), primaryScreen);-
146 m_hardwareScalerX = static_cast<qreal>(m_hardwareWidth) / (g.right() - g.left());-
147 m_hardwareScalerY = static_cast<qreal>(m_hardwareHeight) / (g.bottom() - g.top());-
148-
149 qCDebug(qLcEvdevMouse) << "Absolute pointing device"
never executed: QMessageLogger(__FILE__, 149, __PRETTY_FUNCTION__, qLcEvdevMouse().categoryName()).debug() << "Absolute pointing device" << "hardware max x" << m_hardwareWidth << "hardware max y" << m_hardwareHeight << "hardware scalers x" << m_hardwareScalerX << 'y' << m_hardwareScalerY;
qt_category_enabledDescription
TRUEnever evaluated
FALSEnever evaluated
0
150 << "hardware max x" << m_hardwareWidth
never executed: QMessageLogger(__FILE__, 149, __PRETTY_FUNCTION__, qLcEvdevMouse().categoryName()).debug() << "Absolute pointing device" << "hardware max x" << m_hardwareWidth << "hardware max y" << m_hardwareHeight << "hardware scalers x" << m_hardwareScalerX << 'y' << m_hardwareScalerY;
0
151 << "hardware max y" << m_hardwareHeight
never executed: QMessageLogger(__FILE__, 149, __PRETTY_FUNCTION__, qLcEvdevMouse().categoryName()).debug() << "Absolute pointing device" << "hardware max x" << m_hardwareWidth << "hardware max y" << m_hardwareHeight << "hardware scalers x" << m_hardwareScalerX << 'y' << m_hardwareScalerY;
0
152 << "hardware scalers x" << m_hardwareScalerX << 'y' << m_hardwareScalerY;
never executed: QMessageLogger(__FILE__, 149, __PRETTY_FUNCTION__, qLcEvdevMouse().categoryName()).debug() << "Absolute pointing device" << "hardware max x" << m_hardwareWidth << "hardware max y" << m_hardwareHeight << "hardware scalers x" << m_hardwareScalerX << 'y' << m_hardwareScalerY;
0
153-
154 return true;
never executed: return true;
0
155}-
156-
157void QEvdevMouseHandler::sendMouseEvent()-
158{-
159 int x;-
160 int y;-
161-
162 if (!m_abs) {
!m_absDescription
TRUEnever evaluated
FALSEnever evaluated
0
163 x = m_x - m_prevx;-
164 y = m_y - m_prevy;-
165 }
never executed: end of block
0
166 else {-
167 x = m_x / m_hardwareScalerX;-
168 y = m_y / m_hardwareScalerY;-
169 }
never executed: end of block
0
170-
171 if (m_prevInvalid) {
m_prevInvalidDescription
TRUEnever evaluated
FALSEnever evaluated
0
172 x = y = 0;-
173 m_prevInvalid = false;-
174 }
never executed: end of block
0
175-
176 emit handleMouseEvent(x, y, m_abs, m_buttons);-
177-
178 m_prevx = m_x;-
179 m_prevy = m_y;-
180}
never executed: end of block
0
181-
182void QEvdevMouseHandler::readMouseData()-
183{-
184 struct ::input_event buffer[32];-
185 int n = 0;-
186 bool posChanged = false, btnChanged = false;-
187 bool pendingMouseEvent = false;-
188 int eventCompressCount = 0;-
189 forever {-
190 int result = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);-
191-
192 if (result == 0) {
result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
193 qWarning("evdevmouse: Got EOF from the input device");-
194 return;
never executed: return;
0
195 } else if (result < 0) {
result < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
196 if (errno != EINTR && errno != EAGAIN) {
(*__errno_location ()) != 4Description
TRUEnever evaluated
FALSEnever evaluated
(*__errno_location ()) != 11Description
TRUEnever evaluated
FALSEnever evaluated
0
197 qErrnoWarning(errno, "evdevmouse: Could not read from input device");-
198 // If the device got disconnected, stop reading, otherwise we get flooded-
199 // by the above error over and over again.-
200 if (errno == ENODEV) {
(*__errno_location ()) == 19Description
TRUEnever evaluated
FALSEnever evaluated
0
201 delete m_notify;-
202 m_notify = Q_NULLPTR;-
203 qt_safe_close(m_fd);-
204 m_fd = -1;-
205 }
never executed: end of block
0
206 return;
never executed: return;
0
207 }-
208 } else {
never executed: end of block
0
209 n += result;-
210 if (n % sizeof(buffer[0]) == 0)
n % sizeof(buffer[0]) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
211 break;
never executed: break;
0
212 }
never executed: end of block
0
213 }-
214-
215 n /= sizeof(buffer[0]);-
216-
217 for (int i = 0; i < n; ++i) {
i < nDescription
TRUEnever evaluated
FALSEnever evaluated
0
218 struct ::input_event *data = &buffer[i];-
219 if (data->type == EV_ABS) {
data->type == 0x03Description
TRUEnever evaluated
FALSEnever evaluated
0
220 // Touchpads: store the absolute position for now, will calculate a relative one later.-
221 if (data->code == ABS_X && m_x != data->value) {
data->code == 0x00Description
TRUEnever evaluated
FALSEnever evaluated
m_x != data->valueDescription
TRUEnever evaluated
FALSEnever evaluated
0
222 m_x = data->value;-
223 posChanged = true;-
224 } else if (data->code == ABS_Y && m_y != data->value) {
never executed: end of block
data->code == 0x01Description
TRUEnever evaluated
FALSEnever evaluated
m_y != data->valueDescription
TRUEnever evaluated
FALSEnever evaluated
0
225 m_y = data->value;-
226 posChanged = true;-
227 }
never executed: end of block
0
228 } else if (data->type == EV_REL) {
never executed: end of block
data->type == 0x02Description
TRUEnever evaluated
FALSEnever evaluated
0
229 if (data->code == REL_X) {
data->code == 0x00Description
TRUEnever evaluated
FALSEnever evaluated
0
230 m_x += data->value;-
231 posChanged = true;-
232 } else if (data->code == REL_Y) {
never executed: end of block
data->code == 0x01Description
TRUEnever evaluated
FALSEnever evaluated
0
233 m_y += data->value;-
234 posChanged = true;-
235 } else if (data->code == ABS_WHEEL) { // vertical scroll
never executed: end of block
data->code == 0x08Description
TRUEnever evaluated
FALSEnever evaluated
0
236 // data->value: 1 == up, -1 == down-
237 const int delta = 120 * data->value;-
238 emit handleWheelEvent(delta, Qt::Vertical);-
239 } else if (data->code == ABS_THROTTLE) { // horizontal scroll
never executed: end of block
data->code == 0x06Description
TRUEnever evaluated
FALSEnever evaluated
0
240 // data->value: 1 == right, -1 == left-
241 const int delta = 120 * -data->value;-
242 emit handleWheelEvent(delta, Qt::Horizontal);-
243 }
never executed: end of block
0
244 } else if (data->type == EV_KEY && data->code == BTN_TOUCH) {
never executed: end of block
data->type == 0x01Description
TRUEnever evaluated
FALSEnever evaluated
data->code == 0x14aDescription
TRUEnever evaluated
FALSEnever evaluated
0
245 // We care about touchpads only, not touchscreens -> don't map to button press.-
246 // Need to invalidate prevx/y however to get proper relative pos.-
247 m_prevInvalid = true;-
248 } else if (data->type == EV_KEY && data->code >= BTN_LEFT && data->code <= BTN_JOYSTICK) {
never executed: end of block
data->type == 0x01Description
TRUEnever evaluated
FALSEnever evaluated
data->code >= 0x110Description
TRUEnever evaluated
FALSEnever evaluated
data->code <= 0x120Description
TRUEnever evaluated
FALSEnever evaluated
0
249 Qt::MouseButton button = Qt::NoButton;-
250 // BTN_LEFT == 0x110 in kernel's input.h-
251 // The range of possible mouse buttons ends just before BTN_JOYSTICK, value 0x120.-
252 switch (data->code) {-
253 case 0x110: button = Qt::LeftButton; break; // BTN_LEFT
never executed: break;
never executed: case 0x110:
0
254 case 0x111: button = Qt::RightButton; break;
never executed: break;
never executed: case 0x111:
0
255 case 0x112: button = Qt::MiddleButton; break;
never executed: break;
never executed: case 0x112:
0
256 case 0x113: button = Qt::ExtraButton1; break; // AKA Qt::BackButton
never executed: break;
never executed: case 0x113:
0
257 case 0x114: button = Qt::ExtraButton2; break; // AKA Qt::ForwardButton
never executed: break;
never executed: case 0x114:
0
258 case 0x115: button = Qt::ExtraButton3; break; // AKA Qt::TaskButton
never executed: break;
never executed: case 0x115:
0
259 case 0x116: button = Qt::ExtraButton4; break;
never executed: break;
never executed: case 0x116:
0
260 case 0x117: button = Qt::ExtraButton5; break;
never executed: break;
never executed: case 0x117:
0
261 case 0x118: button = Qt::ExtraButton6; break;
never executed: break;
never executed: case 0x118:
0
262 case 0x119: button = Qt::ExtraButton7; break;
never executed: break;
never executed: case 0x119:
0
263 case 0x11a: button = Qt::ExtraButton8; break;
never executed: break;
never executed: case 0x11a:
0
264 case 0x11b: button = Qt::ExtraButton9; break;
never executed: break;
never executed: case 0x11b:
0
265 case 0x11c: button = Qt::ExtraButton10; break;
never executed: break;
never executed: case 0x11c:
0
266 case 0x11d: button = Qt::ExtraButton11; break;
never executed: break;
never executed: case 0x11d:
0
267 case 0x11e: button = Qt::ExtraButton12; break;
never executed: break;
never executed: case 0x11e:
0
268 case 0x11f: button = Qt::ExtraButton13; break;
never executed: break;
never executed: case 0x11f:
0
269 }-
270 if (data->value)
data->valueDescription
TRUEnever evaluated
FALSEnever evaluated
0
271 m_buttons |= button;
never executed: m_buttons |= button;
0
272 else-
273 m_buttons &= ~button;
never executed: m_buttons &= ~button;
0
274 btnChanged = true;-
275 } else if (data->type == EV_SYN && data->code == SYN_REPORT) {
never executed: end of block
data->type == 0x00Description
TRUEnever evaluated
FALSEnever evaluated
data->code == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
276 if (btnChanged) {
btnChangedDescription
TRUEnever evaluated
FALSEnever evaluated
0
277 btnChanged = posChanged = false;-
278 sendMouseEvent();-
279 pendingMouseEvent = false;-
280 } else if (posChanged) {
never executed: end of block
posChangedDescription
TRUEnever evaluated
FALSEnever evaluated
0
281 posChanged = false;-
282 if (m_compression) {
m_compressionDescription
TRUEnever evaluated
FALSEnever evaluated
0
283 pendingMouseEvent = true;-
284 eventCompressCount++;-
285 } else {
never executed: end of block
0
286 sendMouseEvent();-
287 }
never executed: end of block
0
288 }-
289 } else if (data->type == EV_MSC && data->code == MSC_SCAN) {
never executed: end of block
data->type == 0x04Description
TRUEnever evaluated
FALSEnever evaluated
data->code == 0x04Description
TRUEnever evaluated
FALSEnever evaluated
0
290 // kernel encountered an unmapped key - just ignore it-
291 continue;
never executed: continue;
0
292 }-
293 }
never executed: end of block
0
294 if (m_compression && pendingMouseEvent) {
m_compressionDescription
TRUEnever evaluated
FALSEnever evaluated
pendingMouseEventDescription
TRUEnever evaluated
FALSEnever evaluated
0
295 int distanceSquared = (m_x - m_prevx)*(m_x - m_prevx) + (m_y - m_prevy)*(m_y - m_prevy);-
296 if (distanceSquared > m_jitterLimitSquared)
distanceSquare...erLimitSquaredDescription
TRUEnever evaluated
FALSEnever evaluated
0
297 sendMouseEvent();
never executed: sendMouseEvent();
0
298 }
never executed: end of block
0
299}
never executed: end of block
0
300-
301QT_END_NAMESPACE-
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