/*
 * 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, by Sun Microsystems, Inc.
 * All rights reserved.
 */

/*
 * 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>

/*f
 * 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(w, by, bx)
WINDOW *w;
int by, bx;
{
        int i, dx, dy;
        WINDOW *parent = w->_parent;

#ifdef M_CURSES_TRACE
        __m_trace("mvwin(%p, %d, %d)", w, by, bx);
#endif

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

        if (parent == (WINDOW *) 0) {
                /* Check upper bounds of normal window. */
                if (lines < by + w->_maxy || columns < bx + w->_maxx)
                        return __m_return_code("mvwin", ERR);
        } else {
                /* Check upper bounds of sub-window. */
                if (parent->_begy + parent->_maxy < by + w->_maxy
                || parent->_begx + parent->_maxx < bx + w->_maxx)
                        return __m_return_code("mvwin", 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 = by;
        w->_begx = bx;
        (void) wtouchln(w, 0, w->_maxy, 1);

        return __m_return_code("mvwin", OK);
}

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

#ifdef M_CURSES_TRACE
        __m_trace("mvderwin(%p, %d, %d)", w, py, px);
#endif

        parent = w->_parent;

        if (parent == (WINDOW *) 0)
                return __m_return_code("mvderwin", ERR);

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

        code = mvwin(w, py, px);

        return __m_return_code("mvderwin", code);
}