/*
 * $Id$
 */

/*
 * 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 );
}