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#include <stdlib.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

#include <qvfbhdr.h>

#include <qkbdvfb_qws.h>

#ifndef QT_NO_QWS_KEYBOARD

#ifndef QT_NO_QWS_KBD_QVFB

#include <qwindowsystem_qws.h>

#include <qsocketnotifier.h>

#include <qapplication.h>

#include <private/qcore_unix_p.h> // overrides QT_OPEN

QT_BEGIN_NAMESPACE

QVFbKeyboardHandler::QVFbKeyboardHandler(const QString &device)

    : QObject()

{

    terminalName = device;

    if (terminalName.isEmpty())

        terminalName = QLatin1String("/dev/vkdb");

    kbdFD = -1;

    kbdIdx = 0;

    kbdBufferLen = sizeof(QVFbKeyData) * 5;

    kbdBuffer = new unsigned char [kbdBufferLen];

    if ((kbdFD = QT_OPEN(terminalName.toLatin1().constData(), O_RDONLY | O_NDELAY)) < 0) {

        qWarning("Cannot open %s (%s)", terminalName.toLatin1().constData(),

        strerror(errno));

    } else {

        // Clear pending input

        char buf[2];

        while (QT_READ(kbdFD, buf, 1) > 0) { }

        notifier = new QSocketNotifier(kbdFD, QSocketNotifier::Read, this);

        connect(notifier, SIGNAL(activated(int)),this, SLOT(readKeyboardData()));

    }

}

QVFbKeyboardHandler::~QVFbKeyboardHandler()

{

    if (kbdFD >= 0)

        QT_CLOSE(kbdFD);

    delete [] kbdBuffer;

}

void QVFbKeyboardHandler::readKeyboardData()

{

    int n;

    do {

        n  = QT_READ(kbdFD, kbdBuffer+kbdIdx, kbdBufferLen - kbdIdx);

        if (n > 0)

            kbdIdx += n;

    } while (n > 0);

    int idx = 0;

    while (kbdIdx - idx >= (int)sizeof(QVFbKeyData)) {

        QVFbKeyData *kd = (QVFbKeyData *)(kbdBuffer + idx);

        if (kd->unicode == 0 && kd->keycode == 0 && kd->modifiers == 0 && kd->press) {

            // magic exit key

            qWarning("Instructed to quit by Virtual Keyboard");

            qApp->quit();

        }

        QWSServer::processKeyEvent(kd->unicode ? kd->unicode : 0xffff, kd->keycode, kd->modifiers, kd->press, kd->repeat);

        idx += sizeof(QVFbKeyData);

    }

    int surplus = kbdIdx - idx;

    for (int i = 0; i < surplus; i++)

        kbdBuffer[i] = kbdBuffer[idx+i];

    kbdIdx = surplus;

}

QT_END_NAMESPACE

#endif // QT_NO_QWS_KBD_QVFB

#endif // QT_NO_QWS_KEYBOARD