src/gui/embedded/qkbdum_qws.cpp
author Alex Gilkes <alex.gilkes@nokia.com>
Mon, 11 Jan 2010 14:00:40 +0000
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/****************************************************************************
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**
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** Copyright (C) 2009 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 QtGui module 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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#include "qkbdum_qws.h"
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#include "qvfbhdr.h"
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#if !defined(QT_NO_QWS_KEYBOARD) && !defined(QT_NO_QWS_KBD_UM)
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <qstring.h>
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#include <qwindowsystem_qws.h>
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#include <qsocketnotifier.h>
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#include "qplatformdefs.h"
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QT_BEGIN_NAMESPACE
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class QWSUmKeyboardHandlerPrivate : public QObject
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{
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    Q_OBJECT
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public:
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    QWSUmKeyboardHandlerPrivate(const QString&);
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    ~QWSUmKeyboardHandlerPrivate();
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private slots:
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    void readKeyboardData();
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private:
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    int kbdFD;
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    int kbdIdx;
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    const int kbdBufferLen;
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    unsigned char *kbdBuffer;
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    QSocketNotifier *notifier;
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};
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QWSUmKeyboardHandlerPrivate::QWSUmKeyboardHandlerPrivate(const QString &device)
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    : kbdFD(-1), kbdIdx(0), kbdBufferLen(sizeof(QVFbKeyData)*5)
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{
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    kbdBuffer = new unsigned char [kbdBufferLen];
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    if ((kbdFD = QT_OPEN((const char *)device.toLocal8Bit(), O_RDONLY | O_NDELAY, 0)) < 0) {
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        qDebug("Cannot open %s (%s)", (const char *)device.toLocal8Bit(),
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        strerror(errno));
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    } else {
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        // Clear pending input
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        char buf[2];
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        while (QT_READ(kbdFD, buf, 1) > 0) { }
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        notifier = new QSocketNotifier(kbdFD, QSocketNotifier::Read, this);
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        connect(notifier, SIGNAL(activated(int)),this, SLOT(readKeyboardData()));
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    }
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}
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QWSUmKeyboardHandlerPrivate::~QWSUmKeyboardHandlerPrivate()
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{
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    if (kbdFD >= 0)
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        QT_CLOSE(kbdFD);
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    delete [] kbdBuffer;
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}
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void QWSUmKeyboardHandlerPrivate::readKeyboardData()
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{
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    int n;
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    do {
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        n  = QT_READ(kbdFD, kbdBuffer+kbdIdx, kbdBufferLen - kbdIdx);
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        if (n > 0)
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            kbdIdx += n;
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    } while (n > 0);
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    int idx = 0;
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    while (kbdIdx - idx >= (int)sizeof(QVFbKeyData)) {
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        QVFbKeyData *kd = (QVFbKeyData *)(kbdBuffer + idx);
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        // Qtopia Key filters must still work.
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        QWSServer::processKeyEvent(kd->unicode, kd->keycode, kd->modifiers, kd->press, kd->repeat);
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        idx += sizeof(QVFbKeyData);
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    }
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    int surplus = kbdIdx - idx;
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    for (int i = 0; i < surplus; i++)
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        kbdBuffer[i] = kbdBuffer[idx+i];
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    kbdIdx = surplus;
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}
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QWSUmKeyboardHandler::QWSUmKeyboardHandler(const QString &device)
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    : QWSKeyboardHandler()
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{
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    d = new QWSUmKeyboardHandlerPrivate(device);
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}
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QWSUmKeyboardHandler::~QWSUmKeyboardHandler()
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{
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    delete d;
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}
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QT_END_NAMESPACE
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#include "qkbdum_qws.moc"
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#endif // QT_NO_QWS_KEYBOARD && QT_NO_QWS_KBD_UM