1 /* $NetBSD: copywin.c,v 1.22 2024/12/23 02:58:03 blymn Exp $ */
2
3 /*-
4 * Copyright (c) 1998-1999 Brett Lymn
5 * (blymn@baea.com.au, brett_lymn@yahoo.com.au)
6 * All rights reserved.
7 *
8 * This code has been donated to The NetBSD Foundation by the Author.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 *
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __RCSID("$NetBSD: copywin.c,v 1.22 2024/12/23 02:58:03 blymn Exp $");
35 #endif /* not lint */
36
37 #include <ctype.h>
38 #include <string.h>
39 #include "curses.h"
40 #include "curses_private.h"
41
42 /*
43 * copywin --
44 * Copy the box starting at (sminrow, smincol) with a size that
45 * matches the destination box (dminrow, dmincol) by (dmaxrow, dmaxcol)
46 * from the source window srcwin to the destination window dstwin.
47 * All these coordindinates are relative to the relevant window.
48 * If dooverlay is true then the copy is nondestructive otherwise the
49 * copy is destructive.
50 */
copywin(const WINDOW * srcwin,WINDOW * dstwin,int sminrow,int smincol,int dminrow,int dmincol,int dmaxrow,int dmaxcol,int dooverlay)51 int copywin(const WINDOW *srcwin, WINDOW *dstwin,
52 int sminrow, int smincol,
53 int dminrow, int dmincol, int dmaxrow, int dmaxcol, int dooverlay)
54 {
55 int dcol;
56 __LDATA *sp, *end;
57 #ifdef HAVE_WCHAR
58 cchar_t cc;
59 nschar_t *np;
60 #endif /* HAVE_WCHAR */
61
62 __CTRACE(__CTRACE_WINDOW,
63 "copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n",
64 dooverlay ? "overlay" : "overwrite",
65 sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol);
66
67 if ((srcwin == NULL) || (dstwin == NULL))
68 return ERR;
69
70 /* overwrite() and overlay() can come here with -ve srcwin coords */
71 if (sminrow < 0) {
72 dminrow -= sminrow;
73 sminrow = 0;
74 }
75 if (smincol < 0) {
76 dmincol -= smincol;
77 smincol = 0;
78 }
79
80 /* for symmetry allow dstwin coords to be -ve as well */
81 if (dminrow < 0) {
82 sminrow -= dminrow;
83 dminrow = 0;
84 }
85 if (dmincol < 0) {
86 smincol -= dmincol;
87 dmincol = 0;
88 }
89
90 /* Bound dmaxcol for both windows (should be ok for dstwin) */
91 if (dmaxcol >= dstwin->maxx)
92 dmaxcol = dstwin->maxx - 1;
93 if (smincol + (dmaxcol - dmincol) >= srcwin->maxx)
94 dmaxcol = srcwin->maxx + dmincol - smincol - 1;
95 if (dmaxcol < dmincol)
96 /* nothing in the intersection */
97 return OK;
98
99 /* Bound dmaxrow for both windows (should be ok for dstwin) */
100 if (dmaxrow >= dstwin->maxy)
101 dmaxrow = dstwin->maxy - 1;
102 if (sminrow + (dmaxrow - dminrow) >= srcwin->maxy)
103 dmaxrow = srcwin->maxy + dminrow - sminrow - 1;
104
105 __CTRACE(__CTRACE_WINDOW,
106 "copywin %s mode: from (%d,%d) to (%d,%d-%d,%d)\n",
107 dooverlay ? "overlay" : "overwrite",
108 sminrow, smincol, dminrow, dmincol, dmaxrow, dmaxcol);
109
110 for (; dminrow <= dmaxrow; sminrow++, dminrow++) {
111 sp = &srcwin->alines[sminrow]->line[smincol];
112 end = sp + dmaxcol - dmincol;
113 __CTRACE(__CTRACE_WINDOW, "copywin: row %d\n", sminrow);
114 for (dcol = dmincol; sp <= end; dcol++, sp++) {
115 /* XXX: Perhaps this should check for the
116 * background character
117 */
118 if ((dooverlay && !isspace(sp->ch)) || !dooverlay) {
119 wmove(dstwin, dminrow, dcol);
120 __CTRACE(__CTRACE_WINDOW, "copywin: dcol = %d\n", dcol);
121 #ifndef HAVE_WCHAR
122 __waddch(dstwin, sp);
123 #else
124 cc.vals[0] = sp->ch;
125 cc.attributes = sp->attr;
126 cc.elements = 1;
127 np = sp->nsp;
128 if (np) {
129 while (np && cc.elements <=
130 CURSES_CCHAR_MAX) {
131 cc.vals[cc.elements++] = np->ch;
132 np = np->next;
133 }
134 }
135 wadd_wch(dstwin, &cc);
136 #endif /* HAVE_WCHAR */
137 }
138 }
139 }
140 __touchwin(dstwin, 0);
141 return OK;
142 }
143