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-rw-r--r--src/plugins/generic/evdevmouse/qevdevmouse.cpp214
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diff --git a/src/plugins/generic/evdevmouse/qevdevmouse.cpp b/src/plugins/generic/evdevmouse/qevdevmouse.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qevdevmouse.h"
+
+#include <QSocketNotifier>
+#include <QStringList>
+#include <QPoint>
+#include <QWindowSystemInterface>
+
+#include <qplatformdefs.h>
+#include <private/qcore_unix_p.h> // overrides QT_OPEN
+#include <QtPlatformSupport/private/qudevhelper_p.h>
+
+#include <errno.h>
+
+#include <linux/kd.h>
+#include <linux/input.h>
+
+#include <qdebug.h>
+
+QT_BEGIN_NAMESPACE
+
+QEvdevMouseHandler::QEvdevMouseHandler(const QString &key,
+ const QString &specification)
+ : m_notify(0), m_x(0), m_y(0), m_prevx(0), m_prevy(0),
+ m_xoffset(0), m_yoffset(0), m_buttons(0)
+{
+ Q_UNUSED(key);
+ setObjectName(QLatin1String("Evdev Mouse Handler"));
+
+ QString dev;
+ q_udev_devicePath(UDev_Mouse | UDev_Touchpad, &dev);
+ if (dev.isEmpty())
+ dev = QLatin1String("/dev/input/event0");
+
+ m_compression = true;
+ m_smooth = false;
+ int jitterLimit = 0;
+
+ QStringList args = specification.split(QLatin1Char(':'));
+ foreach (const QString &arg, args) {
+ if (arg == "nocompress")
+ m_compression = false;
+ else if (arg.startsWith("dejitter="))
+ jitterLimit = arg.mid(9).toInt();
+ else if (arg.startsWith("xoffset="))
+ m_xoffset = arg.mid(8).toInt();
+ else if (arg.startsWith("yoffset="))
+ m_yoffset = arg.mid(8).toInt();
+ else if (arg.startsWith(QLatin1String("/dev/")))
+ dev = arg;
+ }
+ m_jitterLimitSquared = jitterLimit*jitterLimit;
+
+ qDebug("evdevmouse: Using device %s", qPrintable(dev));
+ m_fd = QT_OPEN(dev.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);
+ if (m_fd >= 0) {
+ m_notify = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);
+ connect(m_notify, SIGNAL(activated(int)), this, SLOT(readMouseData()));
+ } else {
+ qWarning("Cannot open mouse input device '%s': %s", qPrintable(dev), strerror(errno));
+ return;
+ }
+}
+
+QEvdevMouseHandler::~QEvdevMouseHandler()
+{
+ if (m_fd >= 0)
+ QT_CLOSE(m_fd);
+}
+
+void QEvdevMouseHandler::sendMouseEvent()
+{
+ QPoint pos(m_x + m_xoffset, m_y + m_yoffset);
+ //qDebug("mouse event %d %d %d", pos.x(), pos.y(), int(m_buttons));
+ QWindowSystemInterface::handleMouseEvent(0, pos, pos, m_buttons);
+ m_prevx = m_x;
+ m_prevy = m_y;
+}
+
+void QEvdevMouseHandler::readMouseData()
+{
+ struct ::input_event buffer[32];
+ int n = 0;
+ bool posChanged = false;
+ bool pendingMouseEvent = false;
+ int eventCompressCount = 0;
+ forever {
+ n = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
+
+ if (n == 0) {
+ qWarning("Got EOF from the input device.");
+ return;
+ } else if (n < 0 && (errno != EINTR && errno != EAGAIN)) {
+ qWarning("Could not read from input device: %s", strerror(errno));
+ return;
+ } else if (n % sizeof(buffer[0]) == 0) {
+ break;
+ }
+ }
+
+ n /= sizeof(buffer[0]);
+
+ for (int i = 0; i < n; ++i) {
+ struct ::input_event *data = &buffer[i];
+ //qDebug() << ">>" << hex << data->type << data->code << dec << data->value;
+ if (data->type == EV_ABS) {
+ if (data->code == ABS_X && m_x != data->value) {
+ m_x = data->value;
+ posChanged = true;
+ } else if (data->code == ABS_Y && m_y != data->value) {
+ m_y = data->value;
+ posChanged = true;
+ }
+ } else if (data->type == EV_REL) {
+ if (data->code == REL_X) {
+ m_x += data->value;
+ posChanged = true;
+ } else if (data->code == REL_Y) {
+ m_y += data->value;
+ posChanged = true;
+ } else if (data->code == ABS_WHEEL) { // vertical scroll
+ // data->value: 1 == up, -1 == down
+ int delta = 120 * data->value;
+ QWindowSystemInterface::handleWheelEvent(0, QPoint(m_x, m_y),
+ QPoint(m_x, m_y),
+ delta, Qt::Vertical);
+ } else if (data->code == ABS_THROTTLE) { // horizontal scroll
+ // data->value: 1 == right, -1 == left
+ int delta = 120 * -data->value;
+ QWindowSystemInterface::handleWheelEvent(0, QPoint(m_x, m_y),
+ QPoint(m_x, m_y),
+ delta, Qt::Horizontal);
+ }
+ } else if (data->type == EV_KEY && data->code == BTN_TOUCH) {
+ m_buttons = data->value ? Qt::LeftButton : Qt::NoButton;
+
+ sendMouseEvent();
+ pendingMouseEvent = false;
+ } else if (data->type == EV_KEY && data->code >= BTN_LEFT && data->code <= BTN_MIDDLE) {
+ Qt::MouseButton button = Qt::NoButton;
+ switch (data->code) {
+ case BTN_LEFT: button = Qt::LeftButton; break;
+ case BTN_MIDDLE: button = Qt::MidButton; break;
+ case BTN_RIGHT: button = Qt::RightButton; break;
+ }
+ if (data->value)
+ m_buttons |= button;
+ else
+ m_buttons &= ~button;
+ sendMouseEvent();
+ pendingMouseEvent = false;
+ } else if (data->type == EV_SYN && data->code == SYN_REPORT) {
+ if (posChanged) {
+ posChanged = false;
+ if (m_compression) {
+ pendingMouseEvent = true;
+ eventCompressCount++;
+ } else {
+ sendMouseEvent();
+ }
+ }
+ } else if (data->type == EV_MSC && data->code == MSC_SCAN) {
+ // kernel encountered an unmapped key - just ignore it
+ continue;
+ }
+ }
+ if (m_compression && pendingMouseEvent) {
+ int distanceSquared = (m_x - m_prevx)*(m_x - m_prevx) + (m_y - m_prevy)*(m_y - m_prevy);
+ if (distanceSquared > m_jitterLimitSquared)
+ sendMouseEvent();
+ }
+}
+
+QT_END_NAMESPACE
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