libc/xcurses/mvwin.c

	mvwin.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1995-1998 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/* LINTLIBRARY */

/*
 * mvwin.c
 *
 * XCurses Library
 *
 * Copyright 1990, 1995 by Mortice Kern Systems Inc.  All rights reserved.
 *
 */

#ifdef M_RCSID
#ifndef lint
static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/mvwin.c 1.3 "
"1995/06/15 19:19:58 ant Exp $";
#endif
#endif

#include <private.h>

/*
 * Move window so that the upper left-hand corner is at (x,y). If the move
 * would cause the window to be off the screen, it is an error and the
 * window is not moved.  Moving subwindows is allowed, but should be
 * avoided.
 */
int
mvwin(WINDOW *w, int by, int bx)
{
    int i, dx, dy;
    WINDOW  *parent = w->_parent;

    /* Check lower bounds of new window position. */
    if (by < 0 || bx < 0)
        return (ERR);

    if (parent == NULL) {
        /* Check upper bounds of normal window. */
        if (lines < by + w->_maxy || columns < bx + w->_maxx)
            return (ERR);
    } else {
        /* Check upper bounds of sub-window. */
        if (parent->_begy + parent->_maxy < by + w->_maxy ||
            parent->_begx + parent->_maxx < bx + w->_maxx)
            return (ERR);

        /*
         * Move the sub-window's line pointers to the parent
         * window's data.
         */
        dy = by - parent->_begy;
        dx = bx - parent->_begx;

        for (i = 0; i <= w->_maxy; ++i)
            w->_line[i] = &parent->_line[dy++][dx];
    }

    w->_begy = (short) by;
    w->_begx = (short) bx;
    (void) wtouchln(w, 0, w->_maxy, 1);

    return (OK);
}

int
mvderwin(WINDOW *w, int py, int px)
{
    int code;
    WINDOW  *parent;

    parent = w->_parent;

    if (parent == NULL)
        return (ERR);

    /* Absolute screen address. */
    py += parent->_begy;
    px += parent->_begx;

    code = mvwin(w, py, px);

    return (code);
}