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#include "qvfbprotocol.h"

#include "qvfbhdr.h"

#include <QDebug>

#include <QTimer>

#include <sys/types.h>

#include <sys/stat.h>

#include <math.h>

#include <fcntl.h>

#include <stdlib.h>

#include <stdio.h>

#ifdef Q_OS_UNIX

#include <unistd.h>

#endif

#include "qvfbshmem.h"

QT_BEGIN_NAMESPACE

QVFbViewProtocol::QVFbViewProtocol(int display_id, QObject *parent) :

    QObject(parent), mDisplayId(display_id) { }

QVFbViewProtocol::~QVFbViewProtocol() {}

void QVFbViewProtocol::flushChanges() {}

void QVFbViewProtocol::sendKeyboardData(QString unicode, int keycode,

                                        int modifiers, bool press, bool repeat)

{

    if (keyHandler())

        keyHandler()->sendKeyboardData(unicode, keycode, modifiers, press, repeat);

}

void QVFbViewProtocol::sendMouseData(const QPoint &pos, int buttons, int wheel)

{

    if (mouseHandler())

        mouseHandler()->sendMouseData(pos, buttons, wheel);

}

static int openPipe(const char *fileName)

{

    unlink(fileName);

    mkfifo(fileName, 0666);

    int fd = ::open(fileName, O_RDWR | O_NDELAY);

    return fd;

}

QVFbKeyPipeProtocol::QVFbKeyPipeProtocol(int display_id)

    : QVFbKeyProtocol(display_id)

{

    fileName = QT_VFB_KEYBOARD_PIPE(display_id);

    fd = openPipe(fileName.toLocal8Bit().constData());

    if (fd == -1)

	qFatal("Cannot open keyboard pipe %s", fileName.toLocal8Bit().data());

}

QVFbKeyPipeProtocol::~QVFbKeyPipeProtocol()

{

    sendKeyboardData(0, 0, 0, true, false); // magic die key

    ::close(fd);

    unlink(fileName.toLocal8Bit().constData());

}

void QVFbKeyPipeProtocol::sendKeyboardData(QString unicode, int keycode,

                                           int modifiers, bool press, bool repeat)

{

    QVFbKeyData kd;

    kd.unicode = unicode[0].unicode();

    kd.keycode = keycode;

    kd.modifiers = static_cast<Qt::KeyboardModifier>(modifiers);

    kd.press = press;

    kd.repeat = repeat;

    write(fd, &kd, sizeof(QVFbKeyData));

}

QVFbMousePipe::QVFbMousePipe(int display_id)

    : QVFbMouseProtocol(display_id)

{

    fileName = QT_VFB_MOUSE_PIPE(display_id);

    fd = openPipe(fileName.toLocal8Bit().constData());

    if (fd == -1)

	qFatal("Cannot open mouse pipe %s", fileName.toLocal8Bit().data());

}

QVFbMousePipe::~QVFbMousePipe()

{

    ::close(fd);

    unlink(fileName.toLocal8Bit().constData());

}

void QVFbMousePipe::sendMouseData(const QPoint &pos, int buttons, int wheel)

{

    write(fd, &pos, sizeof(QPoint));

    write(fd, &buttons, sizeof(int));

    write(fd, &wheel, sizeof(int));

}

QVFbMouseLinuxTP::QVFbMouseLinuxTP(int display_id)

    : QObject(), QVFbMousePipe(display_id), lastPos(-1,-1)

{

    /* the timer is needed because a real touch screen send data as long as

       there is pressure.  And the linux tp driver will filter, requiring

       a minimum of 5 samples before it even registers a press.

    */

    repeater = new QTimer(this);

    connect(repeater, SIGNAL(timeout()), this, SLOT(repeatLastPress()));

}

QVFbMouseLinuxTP::~QVFbMouseLinuxTP()

{

}

void QVFbMouseLinuxTP::sendMouseData(const QPoint &pos, int buttons, int)

{

    if (buttons & Qt::LeftButton) {

        // press

        repeater->start(5);

        writeToPipe(pos, 1);

        lastPos = pos;

    } else {

        // release

        if (lastPos == QPoint(-1,-1))

            return; /* only send one release */

        repeater->stop();

        writeToPipe(pos, 0);

        lastPos = QPoint(-1,-1);

    }

}

void QVFbMouseLinuxTP::writeToPipe(const QPoint &pos, ushort pressure)

{

    ushort v;

    write(fd, &pressure, sizeof(ushort));

    v = pos.x();

    write(fd, &v, sizeof(ushort));

    v = pos.y();

    write(fd, &v, sizeof(ushort));

    v = 1; // pad

    write(fd, &v, sizeof(ushort));

}

void QVFbMouseLinuxTP::repeatLastPress()

{

    writeToPipe(lastPos, 1);

}

QT_END_NAMESPACE