/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include <windows.h>
#include <string.h>
#include <limits.h>
#include "wglbl.h"
#include "wmem.h"
#include "wacc.h"
#include "wlist.h"
#include "wisedit.h"
#include "whndl.h"

/****************************************************************************/
/* external function prototypes                                             */
/****************************************************************************/

/****************************************************************************/
/* macro definitions                                                        */
/****************************************************************************/

/****************************************************************************/
/* type definitions                                                         */
/****************************************************************************/
typedef struct {
    WAccelHandle     hndl;
    WAccelEditInfo *info;
} WHndlInfo;

/****************************************************************************/
/* static function prototypes                                               */
/****************************************************************************/
static WHndlInfo *WFindHndlInfo  ( WAccelHandle );
static WHndlInfo *WFindHndlInfoR ( WAccelEditInfo *info );
static void       WFreeHndlInfo  ( WHndlInfo * );
static WHndlInfo *WAllocHndlInfo ( void );

/****************************************************************************/
/* static variables                                                         */
/****************************************************************************/
static WAccelHandle  WNextHndl = 1;
static LIST        *WHndlList = NULL;

WAccelHandle WRegisterEditSession ( WAccelEditInfo *info )
{
    WHndlInfo   *hinfo;

    if ( !info || ( WNextHndl == INT_MAX ) || !( hinfo=WAllocHndlInfo() ) ) {
        return ( 0 );
    }

    hinfo->hndl = WNextHndl;
    hinfo->info = info;

    WInsertObject ( &WHndlList, hinfo );

    WNextHndl++;

    return ( hinfo->hndl );
}

int WUnRegisterEditSession ( WAccelHandle hndl )
{
    WHndlInfo *hinfo;

    if ( !hndl || !( hinfo = WFindHndlInfo ( hndl ) ) ) {
        return ( FALSE );
    }

    ListRemoveElt ( &WHndlList, hinfo );

    WFreeHndlInfo ( hinfo );

    return ( TRUE );
}

WAccelEditInfo *WGetEditSessionInfo ( WAccelHandle hndl )
{
    WHndlInfo *hinfo;

    if ( !hndl || !( hinfo = WFindHndlInfo ( hndl ) ) ) {
        return ( NULL );
    }

    return ( hinfo->info );
}

WAccelHandle WGetEditSessionHandle ( WAccelEditInfo *info )
{
    WHndlInfo *hinfo;

    if ( !info || !( hinfo = WFindHndlInfoR ( info ) ) ) {
        return ( 0 );
    }

    return ( hinfo->hndl );
}

int WIsValidHandle( WAccelHandle hndl )
{
    return ( hndl && WFindHndlInfo ( hndl ) );
}

int WIsAccelDialogMessage( MSG *msg, HACCEL accel_table )
{
    WHndlInfo   *hinfo;
    LIST        *l;
    int         ret;
    HWND        active;

    ret = FALSE;
    active  = GetActiveWindow();

    for( l=WHndlList; l && !ret; l = ListNext( l ) ) {
        hinfo = ListElement( l );
        if( hinfo && ( hinfo->info->win == active ) ) {
            if( WDoesEditHaveFocus() ) {
                if( hinfo->info->edit_dlg != (HWND)NULL ) {
                    ret = IsDialogMessage( hinfo->info->edit_dlg, msg );
                }
                if( !ret ) {
                    ret = TranslateAccelerator( hinfo->info->win, accel_table, msg );
                }
            } else {
                ret = TranslateAccelerator( hinfo->info->win, accel_table, msg );
                if( !ret && hinfo->info->edit_dlg != (HWND)NULL ) {
                    ret = IsDialogMessage( hinfo->info->edit_dlg, msg );
                }
            }
        }
    }

    return ( ret );
}

WHndlInfo *WFindHndlInfo ( WAccelHandle hndl )
{
    WHndlInfo *hinfo;
    LIST       *l;

    for ( l=WHndlList; l; l = ListNext ( l ) ) {
        hinfo = ListElement ( l );
        if ( hinfo->hndl == hndl ) {
            return ( hinfo );
        }
    }

    return ( NULL );
}

WHndlInfo *WFindHndlInfoR ( WAccelEditInfo *info )
{
    WHndlInfo *hinfo;
    LIST       *l;

    for ( l=WHndlList; l; l = ListNext ( l ) ) {
        hinfo = ListElement ( l );
        if ( hinfo->info == info ) {
            return ( hinfo );
        }
    }

    return ( NULL );
}

WHndlInfo *WAllocHndlInfo ( void )
{
    WHndlInfo *info;

    info = (WHndlInfo *) WMemAlloc ( sizeof(WHndlInfo) );

    memset ( info, 0, sizeof(WHndlInfo) );

    return ( info );
}

void WFreeHndlInfo ( WHndlInfo *info )
{
    if ( info ) {
        WMemFree ( info );
    }
}

