/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the plugins of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qmouselinuxinput_qws.h"+
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+
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#include <QScreen>+
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#include <QSocketNotifier>+
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+
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#include <qplatformdefs.h>+
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#include <private/qcore_unix_p.h> // overrides QT_OPEN+
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+
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#include <errno.h>+
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+
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#include <linux/input.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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+
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class QWSLinuxInputMousePrivate : public QObject+
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{+
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    Q_OBJECT+
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public:+
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    QWSLinuxInputMousePrivate(QWSLinuxInputMouseHandler *, const QString &);+
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    ~QWSLinuxInputMousePrivate();+
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+
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    void enable(bool on);+
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+
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private Q_SLOTS:+
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    void readMouseData();+
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+
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private:+
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    QWSLinuxInputMouseHandler *m_handler;+
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    QSocketNotifier *          m_notify;+
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    int                        m_fd;+
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    int                        m_x, m_y;+
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    int                        m_buttons;+
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};+
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+
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QWSLinuxInputMouseHandler::QWSLinuxInputMouseHandler(const QString &device)+
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    : QWSCalibratedMouseHandler(device)+
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{+
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    d = new QWSLinuxInputMousePrivate(this, device);+
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}+
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+
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QWSLinuxInputMouseHandler::~QWSLinuxInputMouseHandler()+
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{+
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    delete d;+
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}+
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+
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void QWSLinuxInputMouseHandler::suspend()+
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{+
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    d->enable(false);+
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}+
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+
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void QWSLinuxInputMouseHandler::resume()+
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{+
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    d->enable(true);+
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}+
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+
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QWSLinuxInputMousePrivate::QWSLinuxInputMousePrivate(QWSLinuxInputMouseHandler *h, const QString &device)+
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    : m_handler(h), m_notify(0), m_x(0), m_y(0), m_buttons(0)+
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{+
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    setObjectName(QLatin1String("LinuxInputSubsystem Mouse Handler"));+
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+
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    QString dev = QLatin1String("/dev/input/event0");+
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    if (device.startsWith(QLatin1String("/dev/")))+
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        dev = device;+
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+
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    m_fd = QT_OPEN(dev.toLocal8Bit().constData(), O_RDONLY | O_NDELAY, 0);+
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    if (m_fd >= 0) {+
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        m_notify = new QSocketNotifier(m_fd, QSocketNotifier::Read, this);+
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        connect(m_notify, SIGNAL(activated(int)), this, SLOT(readMouseData()));+
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    } else {+
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        qWarning("Cannot open mouse input device '%s': %s", qPrintable(dev), strerror(errno));+
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        return;+
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    }+
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}+
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+
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QWSLinuxInputMousePrivate::~QWSLinuxInputMousePrivate()+
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{+
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    if (m_fd >= 0)+
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        QT_CLOSE(m_fd);+
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}+
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+
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void QWSLinuxInputMousePrivate::enable(bool on)+
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{+
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    if (m_notify)+
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        m_notify->setEnabled(on);+
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}+
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+
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void QWSLinuxInputMousePrivate::readMouseData()+
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{+
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    if (!qt_screen)+
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        return;+
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+
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    struct ::input_event buffer[32];+
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    int n = 0;+
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+
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    forever {+
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        n = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);+
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+
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        if (n == 0) {+
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            qWarning("Got EOF from the input device.");+
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            return;+
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        } else if (n < 0 && (errno != EINTR && errno != EAGAIN)) {+
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            qWarning("Could not read from input device: %s", strerror(errno));+
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            return;+
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        } else if (n % sizeof(buffer[0]) == 0) {+
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            break;+
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        }+
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    }+
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+
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    n /= sizeof(buffer[0]);+
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+
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    for (int i = 0; i < n; ++i) {+
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        struct ::input_event *data = &buffer[i];+
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+
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        bool unknown = false;+
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        if (data->type == EV_ABS) {+
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            if (data->code == ABS_X) {+
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                m_x = data->value;+
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            } else if (data->code == ABS_Y) {+
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                m_y = data->value;+
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            } else {+
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                unknown = true;+
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            }+
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        } else if (data->type == EV_REL) {+
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            if (data->code == REL_X) {+
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                m_x += data->value;+
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            } else if (data->code == REL_Y) {+
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                m_y += data->value;+
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            } else {+
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                unknown = true;+
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            }+
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        } else if (data->type == EV_KEY && data->code == BTN_TOUCH) {+
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            m_buttons = data->value ? Qt::LeftButton : 0;+
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        } else if (data->type == EV_KEY) {+
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            int button = 0;+
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            switch (data->code) {+
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            case BTN_LEFT: button = Qt::LeftButton; break;+
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            case BTN_MIDDLE: button = Qt::MidButton; break;+
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            case BTN_RIGHT: button = Qt::RightButton; break;+
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            }+
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            if (data->value)+
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                m_buttons |= button;+
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            else+
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                m_buttons &= ~button;+
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        } else if (data->type == EV_SYN && data->code == SYN_REPORT) {+
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            QPoint pos(m_x, m_y);+
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            pos = m_handler->transform(pos);+
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            m_handler->limitToScreen(pos);+
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            m_handler->mouseChanged(pos, m_buttons);+
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        } else if (data->type == EV_MSC && data->code == MSC_SCAN) {+
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            // kernel encountered an unmapped key - just ignore it+
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            continue;+
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        } else {+
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            unknown = true;+
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        }+
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        if (unknown) {+
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            qWarning("unknown mouse event type=%x, code=%x, value=%x", data->type, data->code, data->value);+
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        }+
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    }+
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}+
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+
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QT_END_NAMESPACE+
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+
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#include "qmouselinuxinput_qws.moc"+
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