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 /*LINTLIBRARY*/
16
17 #ifndef lint
18 static char
19 sccsid[] = "@(#)toucholap.c 1.4 89/08/03 SMI"; /* from UCB 5.1 85/06/07 */
20 #endif /* not lint */
21
22 #include "curses.ext"
23
24 #define min(a, b) ((a) < (b) ? (a) : (b))
25 #define max(a, b) ((a) > (b) ? (a) : (b))
26
27 /*
28 * Touch, on win2, the part that overlaps with win1.
29 */
30
31 int
touchoverlap(WINDOW * win1,WINDOW * win2)32 touchoverlap(WINDOW *win1, WINDOW *win2)
33 {
34 int y, endy, endx, starty, startx;
35
36 #ifdef DEBUG
37 fprintf(outf, "TOUCHOVERLAP(%0.2o, %0.2o);\n", win1, win2);
38 #endif
39 starty = max(win1->_begy, win2->_begy);
40 startx = max(win1->_begx, win2->_begx);
41 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begy);
42 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx);
43 #ifdef DEBUG
44 fprintf(outf, "TOUCHOVERLAP:from (%d,%d) to (%d,%d)\n",
45 starty, startx, endy, endx);
46 fprintf(outf, "TOUCHOVERLAP:win1 (%d,%d) to (%d,%d)\n",
47 win1->_begy, win1->_begx, win1->_begy + win1->_maxy,
48 win1->_begx + win1->_maxx);
49 fprintf(outf, "TOUCHOVERLAP:win2 (%d,%d) to (%d,%d)\n",
50 win2->_begy, win2->_begx, win2->_begy + win2->_maxy,
51 win2->_begx + win2->_maxx);
52 #endif
53 if (starty >= endy || startx >= endx)
54 return (OK);
55 starty -= win2->_begy;
56 startx -= win2->_begx;
57 endy -= win2->_begy;
58 endx -= win2->_begx;
59 endx--;
60 for (y = starty; y < endy; y++)
61 (void) touchline(win2, y, startx, endx);
62 return (OK);
63 }
64