/*
 * $Id$
 */

/*
   Harbour Project source code

   Harbour mouse subsystem for OS/2 compilers.

   Copyright 1999  by Chen Kedem <niki@actcom.co.il>
   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/).

   V 1.3    Chen Kedem                  hb_mouse_Hide() now work in any text
                                        screen mode by calling VioGetMode.
                                        hb_mouse_IsButtonPressed() now return
                                        TRUE if any button was pressed.
   V 1.0    Chen Kedem                  Initial version.
*/

#define INCL_MOU
#define INCL_VIO             /* needed only for VioGetMode/VIOMODEINFO    */
#define INCL_NOPMAPI         /* exclude Presentation Manager Include File */

#include <os2.h>
#include "mouseapi.h"

static unsigned s_uMouHandle;                   /* mouse logical handle */

void hb_mouse_Init()
{
    USHORT fsEvents = MOUSE_MOTION_WITH_BN1_DOWN | MOUSE_BN1_DOWN |
                      MOUSE_MOTION_WITH_BN2_DOWN | MOUSE_BN2_DOWN |
                      MOUSE_MOTION_WITH_BN3_DOWN | MOUSE_BN3_DOWN ;

    if ( MouOpen ( 0L, &s_uMouHandle ) )        /* try to open mouse */
        s_uMouHandle = 0;                       /* no mouse found */
    else
        MouSetEventMask ( &fsEvents, s_uMouHandle );     /* mask some events */
}

void hb_mouse_Exit(void)
{
    if ( s_uMouHandle )
    {
        MouClose ( s_uMouHandle );              /* relese mouse handle */
        s_uMouHandle = 0;
    }
}

BOOL hb_mouse_IsPresent(void)
{
    return ( s_uMouHandle != 0 );
}

void hb_mouse_Show(void)
{
    if ( s_uMouHandle )
        MouDrawPtr ( s_uMouHandle );
}

void hb_mouse_Hide(void)
{
    /*
       NOTE: mouse cursor always visible if not in full screen
    */
    NOPTRRECT rect;
    VIOMODEINFO vi;                             /* needed to get max Row/Col */
    if ( s_uMouHandle )
    {
        /*
           QUESTION: should I call the GT MaxRow/Col function ?
           pro: encapsulating of the GetScreen function
           con: calling function from another module, GT must be linked in
           con: VioGetMode is been called twice
        */
        vi.cb = sizeof(VIOMODEINFO);
        VioGetMode(&vi, 0);
        rect.row  = 0;                          /* x-coordinate upper left */
        rect.col  = 0;                          /* y-coordinate upper left */
        rect.cRow = vi.row - 1;                 /* x-coordinate lower right */
        rect.cCol = vi.col - 1;                 /* y-coordinate lower right */
        MouRemovePtr ( &rect, s_uMouHandle );
    }
}

/*
   QUESTION: when getting mouse coordinate you normally need both
   row and column, we should think about using just one function
   hb_mouse_GetPos( &row, &col ) or something like that
*/

int hb_mouse_Col(void)
{
    PTRLOC pos;
    if ( s_uMouHandle )
    {
        MouGetPtrPos ( &pos, s_uMouHandle );
    }
    return ( (int)pos.col );
}

int hb_mouse_Row(void)
{
    PTRLOC pos;
    if ( s_uMouHandle )
    {
        MouGetPtrPos ( &pos, s_uMouHandle );
    }
    return ( (int)pos.row );
}

void hb_mouse_SetPos( int row, int col )
{
    PTRLOC pos;
    if ( s_uMouHandle )
    {
        pos.row = (USHORT)row;
        pos.col = (USHORT)col;
        MouSetPtrPos ( &pos, s_uMouHandle );
    }
}

BOOL hb_mouse_IsButtonPressed( int iButton )
{
    /*
       TOFIX: every time I read event from the queue I lose the result
       so I can not check if iButton was pressed, so for now I ignore
       iButton and return TRUE if the last event saved had DOWN in it.
       also to keep the noise level down I mask out MOUSE_MOTION events.
    */
    USHORT uMask = 0x0000;
    USHORT WaitOption = 0;    /* 1 = wait until mouse event exist, 0 = don't */
    MOUEVENTINFO MouEvent;
    if ( s_uMouHandle )
    {
        MouReadEventQue ( &MouEvent, &WaitOption, s_uMouHandle );
        uMask = MouEvent.fs;

#ifdef PLEASE_PLEASE_MAKE_IT_WORK
        switch(iButton)
        {
        case 1:
            uMask &= ( MOUSE_MOTION_WITH_BN1_DOWN | MOUSE_BN1_DOWN );
            break;
        case 2:
            uMask &= ( MOUSE_MOTION_WITH_BN2_DOWN | MOUSE_BN2_DOWN );
            break;
        case 3:
            uMask &= ( MOUSE_MOTION_WITH_BN3_DOWN | MOUSE_BN3_DOWN );
            break;
        }
#else
            uMask &= (
                       MOUSE_MOTION_WITH_BN1_DOWN | MOUSE_BN1_DOWN |
                       MOUSE_MOTION_WITH_BN2_DOWN | MOUSE_BN2_DOWN |
                       MOUSE_MOTION_WITH_BN3_DOWN | MOUSE_BN3_DOWN
                     ) ;
#endif
    }
    return ( uMask != 0 );
}

int hb_mouse_CountButton(void)
{
    USHORT usButtons = 0;
    if ( s_uMouHandle )
    {
        MouGetNumButtons ( &usButtons, s_uMouHandle );
    }
    return ( (int)usButtons );
}

void hb_mouse_SetBounds( int iTop, int iLeft, int iBottom, int iRight )
{
    /*
       TODO: (I don't think that the OS/2 got a function to do it)
    */
}

void hb_mouse_GetBounds( int * piTop, int * piLeft, int * piBottom, int * piRight )
{
    /*
       TODO: (I don't think that the OS/2 got a function to do it)
    */
}