1/*	$NetBSD: mvwin.c,v 1.15 2003/08/07 16:44:22 agc Exp $	*/
2
3/*
4 * Copyright (c) 1981, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)mvwin.c	8.2 (Berkeley) 5/4/94";
36#else
37__RCSID("$NetBSD: mvwin.c,v 1.15 2003/08/07 16:44:22 agc Exp $");
38#endif
39#endif				/* not lint */
40
41#include "curses.h"
42#include "curses_private.h"
43
44/*
45 * mvderwin --
46 *      Move a derived window.  This does not change the physical screen
47 * coordinates of the subwin, rather maps the characters in the subwin
48 * sized part of the parent window starting at dy, dx into the subwin.
49 *
50 */
51int
52mvderwin(WINDOW *win, int dy, int dx)
53{
54	WINDOW *parent;
55	int ox, oy, i;
56
57	if (win == NULL)
58		return ERR;
59
60	parent = win->orig;
61
62	if (parent == NULL)
63		return ERR;
64
65	if (((win->maxx + dx) > parent->maxx) ||
66	    ((win->maxy + dy) > parent->maxy))
67		return ERR;
68
69	ox = win->begx;
70	oy = win->begy;
71
72	win->begx = parent->begx + dx;
73	win->begy = parent->begy + dy;
74
75	__set_subwin(parent, win);
76
77	win->begx = ox;
78	win->begy = oy;
79
80	for (i = 0; i < win->maxy; i++)
81                win->alines[i]->flags = __ISDIRTY;
82
83	return OK;
84}
85
86/*
87 * mvwin --
88 *	Relocate the starting position of a window.
89 */
90int
91mvwin(WINDOW *win, int by, int bx)
92{
93	WINDOW *orig;
94	int     dy, dx;
95
96	if (by < 0 || by + win->maxy > LINES || bx < 0 || bx + win->maxx > COLS)
97		return (ERR);
98	dy = by - win->begy;
99	dx = bx - win->begx;
100	orig = win->orig;
101	if (orig == NULL) {
102		orig = win;
103		do {
104			win->begy += dy;
105			win->begx += dx;
106			__swflags(win);
107			win = win->nextp;
108		} while (win != orig);
109	} else {
110		if (by < orig->begy || win->maxy + dy > orig->maxy)
111			return (ERR);
112		if (bx < orig->begx || win->maxx + dx > orig->maxx)
113			return (ERR);
114		win->begy = by;
115		win->begx = bx;
116		__swflags(win);
117		__set_subwin(orig, win);
118	}
119	__touchwin(win);
120	return (OK);
121}
122