uivmove.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 75 行

/****************************************************************************
*
*                            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 "uidef.h"


void global uivmoveblock( VSCREEN *vptr, SAREA area, int drow, int dcol )
/***********************************************************************/
{
    register    BUFFER                  *bptr;
    register    ORD                     row;

    okopen( vptr );
    bptr = &(vptr->window.type.buffer);
    if( area.row + drow < 0 ) {
        area.height += area.row + drow;
        area.row = -drow;
    }
    if( area.col + dcol < 0 ) {
        area.width += area.col + dcol;
        area.col = -dcol;
    }
    if( area.row + area.height + drow > vptr->area.height ) {
        area.height = vptr->area.height - area.row - drow;
    }
    if( area.col + area.width + dcol > vptr->area.width ) {
        area.width = vptr->area.width - area.col - dcol;
    }
    oksubarea( area, vptr->area );
    if( drow > 0 ) {
        for( row = area.height + area.row ; row > area.row ;  ) {
            --row;
            uibcopy( bptr, row, area.col,
                   bptr, row + drow, area.col + dcol, area.width );
        }
    } else {
        for( row = area.row ; row < area.row + area.height ; ++row ) {
            uibcopy( bptr, row, area.col,
                   bptr, row + drow, area.col + dcol, area.width );
        }
    }
    area.row += drow;
    area.col += dcol;
    uivdirty( vptr, area );
}