1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 1995-1998 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 /* LINTLIBRARY */
28
29 /*
30 * copywin.c
31 *
32 * XCurses Library
33 *
34 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved.
35 *
36 */
37
38 #ifdef M_RCSID
39 #ifndef lint
40 static char rcsID[] =
41 "$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/"
42 "libxcurses/src/libc/xcurses/rcs/copywin.c 1.6 1998/06/01 17:29:15 "
43 "cbates Exp $";
44 #endif
45 #endif
46
47 #include <private.h>
48
49 #undef min
50 #define min(a, b) ((a) < (b) ? (a) : (b))
51
52 /*
53 * Version of copywin used internally by Curses to compute
54 * the intersection of the two windows before calling copywin().
55 */
56 int
__m_copywin(const WINDOW * s,WINDOW * t,int transparent)57 __m_copywin(const WINDOW *s, WINDOW *t, int transparent)
58 {
59 int code, sminr, sminc, tminr, tminc, tmaxr, tmaxc;
60
61 tmaxc = min(s->_begx + s->_maxx, t->_begx + t->_maxx) - 1 - t->_begx;
62 tmaxr = min(s->_begy + s->_maxy, t->_begy + t->_maxy) - 1 - t->_begy;
63
64 if (s->_begy < t->_begy) {
65 sminr = t->_begy - s->_begy;
66 tminr = 0;
67 } else {
68 sminr = 0;
69 tminr = s->_begy - t->_begy;
70 }
71 if (s->_begx < t->_begx) {
72 sminc = t->_begx - s->_begx;
73 tminc = 0;
74 } else {
75 sminc = 0;
76 tminc = s->_begx- t->_begx;
77 }
78 code = copywin(s, t, sminr, sminc,
79 tminr, tminc, tmaxr, tmaxc, transparent);
80
81 return (code);
82 }
83
84 /*
85 * Overlay specified part of source window over destination window
86 * NOTE copying is destructive only if transparent is set to false.
87 */
88 int
copywin(const WINDOW * s,WINDOW * t,int sminr,int sminc,int tminr,int tminc,int tmaxr,int tmaxc,int transparent)89 copywin(const WINDOW *s, WINDOW *t,
90 int sminr, int sminc, int tminr, int tminc,
91 int tmaxr, int tmaxc, int transparent)
92 {
93 int tc;
94 cchar_t *st, *tt;
95 cchar_t bg = s->_bg;
96
97 for (; tminr <= tmaxr; ++tminr, ++sminr) {
98 st = s->_line[sminr] + sminc;
99 tt = t->_line[tminr] + tminc;
100
101 /* Copy source region to target. */
102 for (tc = tminc; tc <= tmaxc; ++tc, ++tt, ++st) {
103 if (transparent) {
104 if (__m_cc_compare(st, &bg, 1))
105 continue;
106 }
107 *tt = *st;
108 __m_touch_locs(t, tminr, tc, tc + 1);
109 }
110 #ifdef M_CURSES_SENSIBLE_WINDOWS
111 /*
112 * Case 4 -
113 * Expand incomplete glyph from source into target window.
114 */
115 if (0 < tminc && !t->_line[tminr][tminc]._f)
116 (void) __m_cc_expand(t, tminr, tminc, -1);
117 if (tmaxc + 1 < t->_maxx && !__m_cc_islast(t, tminr, tmaxc))
118 (void) __m_cc_expand(t, tminr, tmaxc, 1);
119 #endif /* M_CURSES_SENSIBLE_WINDOWS */
120 }
121
122 return (OK);
123 }
124