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ad787160 C |
1 | /* |
2 | * Copyright (c) 1981, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
c0567266 KB |
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. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
ad787160 C |
32 | */ |
33 | ||
34 | #ifndef lint | |
35 | static char sccsid[] = "@(#)overlay.c 8.1 (Berkeley) 6/4/93"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include <ctype.h> | |
39 | #include <curses.h> | |
40 | ||
41 | /* | |
42 | * overlay -- | |
43 | * Writes win1 on win2 non-destructively. | |
44 | */ | |
45 | int | |
46 | overlay(win1, win2) | |
47 | register WINDOW *win1, *win2; | |
48 | { | |
49 | ||
50 | register int x, y, y1, y2, endy, endx, starty, startx; | |
51 | register __LDATA *sp, *end; | |
52 | ||
53 | #ifdef DEBUG | |
54 | __CTRACE("overlay: (%0.2o, %0.2o);\n", win1, win2); | |
55 | #endif | |
56 | starty = max(win1->begy, win2->begy); | |
57 | startx = max(win1->begx, win2->begx); | |
58 | endy = min(win1->maxy + win1->begy, win2->maxy + win2->begx); | |
59 | endx = min(win1->maxx + win1->begx, win2->maxx + win2->begx); | |
60 | #ifdef DEBUG | |
61 | __CTRACE("overlay: from (%d,%d) to (%d,%d)\n", | |
62 | starty, startx, endy, endx); | |
63 | #endif | |
64 | if (starty >= endy || startx >= endx) | |
65 | return (OK); | |
66 | y1 = starty - win1->begy; | |
67 | y2 = starty - win2->begy; | |
68 | for (y = starty; y < endy; y++, y1++, y2++) { | |
69 | end = &win1->lines[y1]->line[endx - win1->begx]; | |
70 | x = startx - win2->begx; | |
71 | for (sp = &win1->lines[y1]->line[startx - win1->begx]; | |
72 | sp < end; sp++) { | |
73 | if (!isspace(sp->ch)) { | |
74 | wmove(win2, y2, x); | |
75 | __waddch(win2, sp); | |
76 | } | |
77 | x++; | |
78 | } | |
79 | } | |
80 | return (OK); | |
81 | } |