1 /*
2 * Copyright (c) 1981, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef lint
31 static char sccsid[] = "@(#)toucholap.c 8.2 (Berkeley) 5/4/94";
32 #endif /* not lint */
33
34 #include "curses.h"
35
36 /*
37 * touchoverlap --
38 * Touch, on win2, the part that overlaps with win1.
39 */
40 int
touchoverlap(win1,win2)41 touchoverlap(win1, win2)
42 register WINDOW *win1, *win2;
43 {
44 register int y, endy, endx, starty, startx;
45
46 #ifdef DEBUG
47 __CTRACE("touchoverlap: (%0.2o, %0.2o);\n", win1, win2);
48 #endif
49 starty = max(win1->begy, win2->begy);
50 startx = max(win1->begx, win2->begx);
51 endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx);
52 endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx);
53 #ifdef DEBUG
54 __CTRACE("touchoverlap: from (%d,%d) to (%d,%d)\n",
55 starty, startx, endy, endx);
56 __CTRACE("touchoverlap: win1 (%d,%d) to (%d,%d)\n",
57 win1->begy, win1->begx, win1->begy + win1->maxy,
58 win1->begx + win1->maxx);
59 __CTRACE("touchoverlap: win2 (%d,%d) to (%d,%d)\n",
60 win2->begy, win2->begx, win2->begy + win2->maxy,
61 win2->begx + win2->maxx);
62 #endif
63 if (starty >= endy || startx >= endx)
64 return (OK);
65 starty -= win2->begy;
66 startx -= win2->begx;
67 endy -= win2->begy;
68 endx -= win2->begx;
69 for (--endx, y = starty; y < endy; y++)
70 __touchline(win2, y, startx, endx, 0);
71 return (OK);
72 }
73
74