1/*
2 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
3 * Use is subject to license terms.
4 */
5
6/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
7/*	  All Rights Reserved  	*/
8
9/*
10 * Copyright (c) 1980 Regents of the University of California.
11 * All rights reserved.  The Berkeley software License Agreement
12 * specifies the terms and conditions for redistribution.
13 */
14
15#pragma ident	"%Z%%M%	%I%	%E% SMI"
16
17/*LINTLIBRARY*/
18
19#ifndef lint
20static char
21sccsid[] = "@(#)toucholap.c 1.4 89/08/03 SMI"; /* from UCB 5.1 85/06/07 */
22#endif	/* not lint */
23
24#include	"curses.ext"
25
26#define	min(a, b)	((a) < (b) ? (a) : (b))
27#define	max(a, b)	((a) > (b) ? (a) : (b))
28
29/*
30 *	Touch, on win2, the part that overlaps with win1.
31 */
32
33int
34touchoverlap(WINDOW *win1, WINDOW *win2)
35{
36	int	y, endy, endx, starty, startx;
37
38#ifdef DEBUG
39	fprintf(outf, "TOUCHOVERLAP(%0.2o, %0.2o);\n", win1, win2);
40#endif
41	starty = max(win1->_begy, win2->_begy);
42	startx = max(win1->_begx, win2->_begx);
43	endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
44	endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
45#ifdef DEBUG
46	fprintf(outf, "TOUCHOVERLAP:from (%d,%d) to (%d,%d)\n",
47	    starty, startx, endy, endx);
48	fprintf(outf, "TOUCHOVERLAP:win1 (%d,%d) to (%d,%d)\n",
49	    win1->_begy, win1->_begx, win1->_begy + win1->_maxy,
50	    win1->_begx + win1->_maxx);
51	fprintf(outf, "TOUCHOVERLAP:win2 (%d,%d) to (%d,%d)\n",
52	    win2->_begy, win2->_begx, win2->_begy + win2->_maxy,
53	    win2->_begx + win2->_maxx);
54#endif
55	if (starty >= endy || startx >= endx)
56		return (OK);
57	starty -= win2->_begy;
58	startx -= win2->_begx;
59	endy -= win2->_begy;
60	endx -= win2->_begx;
61	endx--;
62	for (y = starty; y < endy; y++)
63		(void) touchline(win2, y, startx, endx);
64	return (OK);
65}
66