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87c6fcf8 | 1 | /* |
2f14f200 KB |
2 | * Copyright (c) 1981 Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
a399f6c8 KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
87c6fcf8 DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
a399f6c8 | 19 | static char sccsid[] = "@(#)overlay.c 5.5 (Berkeley) %G%"; |
2f14f200 | 20 | #endif /* not lint */ |
87c6fcf8 | 21 | |
421683f2 | 22 | # include "curses.ext" |
d50ec87c KA |
23 | # include <ctype.h> |
24 | ||
25 | # define min(a,b) (a < b ? a : b) | |
700b1e78 | 26 | # define max(a,b) (a > b ? a : b) |
d50ec87c KA |
27 | |
28 | /* | |
29 | * This routine writes win1 on win2 non-destructively. | |
30 | * | |
d50ec87c KA |
31 | */ |
32 | overlay(win1, win2) | |
33 | reg WINDOW *win1, *win2; { | |
34 | ||
35 | reg char *sp, *end; | |
afe690b7 | 36 | reg int x, y, endy, endx, starty, startx; |
bd11b531 | 37 | reg int y1,y2; |
d50ec87c KA |
38 | |
39 | # ifdef DEBUG | |
40 | fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2); | |
41 | # endif | |
52f06ac3 JB |
42 | starty = max(win1->_begy, win2->_begy); |
43 | startx = max(win1->_begx, win2->_begx); | |
44 | endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begx); | |
45 | endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); | |
46 | # ifdef DEBUG | |
47 | fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx); | |
48 | # endif | |
49 | if (starty >= endy || startx >= endx) | |
50 | return; | |
bd11b531 JB |
51 | y1 = starty - win1->_begy; |
52 | y2 = starty - win2->_begy; | |
53 | for (y = starty; y < endy; y++, y1++, y2++) { | |
54 | end = &win1->_y[y1][endx - win1->_begx]; | |
52f06ac3 | 55 | x = startx - win2->_begx; |
bd11b531 JB |
56 | for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) { |
57 | if (!isspace(*sp)) | |
58 | mvwaddch(win2, y2, x, *sp); | |
d50ec87c KA |
59 | x++; |
60 | } | |
61 | } | |
62 | } |