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//==========================================================================
//
//      mou_vnc_ecos.c
//
//
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under    
// the terms of the GNU General Public License as published by the Free     
// Software Foundation; either version 2 or (at your option) any later      
// version.                                                                 
//
// eCos is distributed in the hope that it will be useful, but WITHOUT      
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
//
// You should have received a copy of the GNU General Public License        
// along with eCos; if not, write to the Free Software Foundation, Inc.,    
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            
//
// As a special exception, if other files instantiate templates or use      
// macros or inline functions from this file, or you compile this file      
// and link it with other works to produce a work based on this file,       
// this file does not by itself cause the resulting work to be covered by   
// the GNU General Public License. However the source code for this file    
// must still be made available in accordance with section (3) of the GNU   
// General Public License v2.                                               
//
// This exception does not invalidate any other reasons why a work based    
// on this file might be covered by the GNU General Public License.         
// -------------------------------------------                              
// ####ECOSGPLCOPYRIGHTEND####                                              
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    Chris Garry <cgarry@sweeneydesign.co.uk>
// Contributors:
// Date:         2003-08-22
// Purpose:
// Description:  Microwindows mouse driver for VNC server on eCos
//
//####DESCRIPTIONEND####
//
//========================================================================*/
 
 
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <sys/ioctl.h>
#include <pkgconf/vnc_server.h>  /* CYGDAT_VNC_SERVER_MOUSE_NAME */
#include "device.h"
 
static int vnc_Open(MOUSEDEVICE *pmd);
static void vnc_Close(void);
static int vnc_GetButtonInfo(void);
static void vnc_GetDefaultAccel(int *pscale,int *pthresh);
static int vnc_Read(MWCOORD *px, MWCOORD *py, MWCOORD *pz, int *pb);
 
static int mouse_fd = -1;
 
/* Hack extern to used when hiding the mouse cursor
 * There needs to be a better way to do this
*/
extern SCREENDEVICE scrdev;
 
MOUSEDEVICE mousedev = {
    vnc_Open,
    vnc_Close,
    vnc_GetButtonInfo,
    vnc_GetDefaultAccel,
    vnc_Read,
    NULL
};
 
 
static int vnc_Open(MOUSEDEVICE *pmd)
{
    mouse_fd = open(CYGDAT_VNC_SERVER_MOUSE_NAME, O_RDONLY | O_NONBLOCK);
    if (mouse_fd < 0)
    {
        EPRINTF("Error %d opening VNC mouse\n", errno);
        return -1;
    }
 
//    GdHideCursor(&scrdev);
    return mouse_fd;
}
 
static void vnc_Close(void)
{
    /* Close the mouse device. */
    if (mouse_fd >= 0)
    {
        close(mouse_fd);
    }
 
    mouse_fd = -1;
}
 
static int vnc_GetButtonInfo(void)
{
 	/* Get mouse buttons supported */
    return (MWBUTTON_L + MWBUTTON_R);
}
 
static void vnc_GetDefaultAccel(int *pscale,int *pthresh)
{
	/*
	 * Get default mouse acceleration settings
	 * Just return something inconspicuous for now.
	 */
//     diag_printf("Mouse: vnc_GetDefaultAccel()\n");
	*pscale = 3;
	*pthresh = 5;
}
 
static int vnc_Read(MWCOORD *px, MWCOORD *py, MWCOORD *pz, int *pb)
{
	/* Read a mouse event */
    cyg_uint8 data[8];
    int bytes_read;
 
    bytes_read = read(mouse_fd, data, 8);
 
    if (bytes_read != sizeof(data))
    {
        if (errno == EINTR || errno == EAGAIN)
        {
            return 0;
        }
        /*
         * kernel driver bug: select returns read available,
         * but read returns -1
         * we return 0 here to avoid GsError above
         */
        /*return -1;*/
 
        return 0;
    }
 
    *px = data[2]*256 + data[3];
    *py = data[4]*256 + data[5];
    *pb = 0;
    if (data[1] & 0x01)
    {
        *pb += MWBUTTON_L;
    }
    if (data[1] & 0x04)
    {
        *pb += MWBUTTON_R;
    }
 
    *pz = 0;
 
    return 2;
 
#if 0
    if(! *pb )
    {
        return 1;         /* Don't have button data */
    }
    else
    {
        return 2;         /* Have full set of data */
    }
#endif
 
}