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
20 static char
21 sccsid[] = "@(#)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
33 int
touchoverlap(WINDOW * win1,WINDOW * win2)34 touchoverlap(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