/*
 * $Id$
 */

/*
   Harbour Project source code

   Harbour Mouse Subsystem for DOS

   Copyright 1999 Jose Lalin <dezac@corevia.com>.
                  Luiz Rafael Culik <Culik@sl.conex.net>.
   www - http://www.harbour-project.org

   This program 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 of the License, or
   (at your option) any later version, with one exception:

   The exception is that if you link the Harbour Runtime Library (HRL)
   and/or the Harbour Virtual Machine (HVM) with other files to produce
   an executable, this does not by itself cause the resulting executable
   to be covered by the GNU General Public License. Your use of that
   executable is in no way restricted on account of linking the HRL
   and/or HVM code into it.

   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
   their web site at http://www.gnu.org/).

*/

/* TOFIX: Change this to something better */
/* #define BORLANDC */

#ifdef BORLANDC
   #pragma inline

   #include <dos.h>
#endif

#include "mouseapi.h"
#include "gtapi.h"

/* C callable low-level interface */

BOOL s_bPresent = FALSE;          /* Is there a mouse ? */
int  s_iButtons = 0;              /* Mouse buttons */
int  s_iCursorVisible = 0;        /* Is mouse cursor visible ? */
int  s_iInitCol = 0;              /* Init mouse pos */
int  s_iInitRow = 0;              /* Init mouse pos */

void hb_mouse_Init( void )
{
   /* TODO: */

#ifdef BORLANDC
   asm
   {
      xor ax, ax
      int MOUSE_INTERRUPT
      mov s_bPresent, ax
      mov s_iButtons, bx
   }

   if( s_bPresent )
   {
      s_iInitCol = hb_mouse_Col();
      s_iInitRow = hb_mouse_Row();
   }
#endif
}

void hb_mouse_Exit( void )
{
   hb_mouse_SetPos( s_iInitRow, s_iInitCol );
   hb_mouse_SetBounds( 0, 0, hb_gtMaxCol(), hb_gtMaxRow() );
}

BOOL hb_mouse_IsPresent( void )
{
   return s_bPresent;
}

void hb_mouse_Show( void )
{
   /* TODO: */

   if( s_bPresent )
   {
#ifdef BORLANDC
      asm
      {
         mov ax, 1
         int MOUSE_INTERRUPT
      }

      s_iCursorVisible = TRUE;
#endif
   }

}

void hb_mouse_Hide( void )
{
   /* TODO: */

   if( s_bPresent )
   {
#ifdef BORLANDC
      asm
      {
         mov ax, 2
         int MOUSE_INTERRUPT
      }

      s_iCursorVisible = FALSE;
#endif
   }
}

int hb_mouse_Col( void )
{
   /* TODO: */

   if( s_bPresent )
   {
#ifdef BORLANDC
      int iCol;

      asm
      {
         mov ax, 3
         int MOUSE_INTERRUPT
         mov iCol, cx
      }

      return iCol / 8;
#else
      return 0;
#endif
   }

   return -1;
}

int hb_mouse_Row( void )
{
   /* TODO: */

   if( s_bPresent )
   {
#ifdef BORLANDC
      int iRow;

      asm
      {

         mov ax, 3
         int MOUSE_INTERRUPT
         mov iRow, dx
      }
      return  iRow / 8;
#else
      return 0;
#endif
   }

   return -1;
}

void hb_mouse_SetPos( int iRow, int iCol )
{
   /* TODO: */

   if( s_bPresent )
   {
#ifdef BORLANDC
      iRow *= 8;
      iCol *= 8;

      asm
      {
         mov ax, 4
         mov cx, iRow
         mov dx, iCol
         int MOUSE_INTERRUPT
      }
#endif
   }
}

BOOL hb_mouse_IsButtonPressed( int iButton )
{
   /* TODO: */

   if( s_bPresent )
   {
#ifdef BORLANDC
      int iReturn = 0;

      asm
      {
         mov ax, 5
         int MOUSE_INTERRUPT
         mov iReturn, bx
      }

      /* Convert the button number (1 -> x) to a bitmask and check */
      /* TODO: Test if this works */

      return ( ( 2 ** ( iButton - 1 ) ) && iReturn );
#else
      return FALSE;
#endif
   }

   return FALSE;
}

int hb_mouse_CountButton( void )
{
   /* TODO: */

   int iButton = 0;

   if( s_bPresent )
   {
#ifdef BORLANDC
      asm
      {
         mov ax,3
         int MOUSE_INTERRUPT
         mov iButton,bx
      }
#endif
   }

   return iButton;
}

void hb_mouse_SetBounds( int iTop, int iLeft, int iBottom, int iRight )
{
   /* TODO: */

   if( s_bPresent )
   {
#ifdef BORLANDC
      iLeft *= 8;
      iRight *= 8;

      asm
      {
         mov ax, 7
         mov cx, iLeft
         mov dx, iRight
         int MOUSE_INTERRUPT
      }

      iTop *= 8;
      iBottom *= 8;

      asm
      {
         mov ax, 8
         mov cx, iTop
         mov dx, iBottom
         int MOUSE_INTERRUPT
      }
#endif
   }
}

void hb_mouse_GetBounds( int * piTop, int * piLeft, int * piBottom, int * piRight )
{
   /* TODO: */

   HB_SYMBOL_UNUSED( piTop );
   HB_SYMBOL_UNUSED( piLeft );
   HB_SYMBOL_UNUSED( piBottom );
   HB_SYMBOL_UNUSED( piRight );
}