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 1997 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * University Copyright- Copyright (c) 1982, 1986, 1988
32 * The Regents of the University of California
33 * All Rights Reserved
34 *
35 * University Acknowledgment- Portions of this document are derived from
36 * software developed by the University of California, Berkeley, and its
37 * contributors.
38 */
39
40 #pragma ident "%Z%%M% %I% %E% SMI"
41
42 /*LINTLIBRARY*/
43
44 #include <sys/types.h>
45 #include "curses_inc.h"
46
47 /* Change the background of a window. nbkgd : new background. */
48
49 int
wbkgd(WINDOW * win,chtype nbkgd)50 wbkgd(WINDOW *win, chtype nbkgd)
51 {
52 short maxx;
53 int x, y;
54 chtype *wcp, obkgda, obkgdc, nbkgda,
55 nbkgdc, acolor, c;
56 short *begch, *endch;
57
58 /* if 'nbkgd' contains color information, but this is not a color */
59 /* terminal, erase that information. */
60
61 if ((nbkgd & A_COLOR) && (cur_term->_pairs_tbl == NULL))
62 nbkgd &= ~A_COLOR;
63
64 if (nbkgd == win->_bkgd)
65 return (OK);
66
67 obkgdc = _CHAR(win->_bkgd);
68 obkgda = _ATTR(win->_bkgd);
69
70 nbkgdc = _CHAR(nbkgd);
71 nbkgda = _ATTR(nbkgd);
72
73 /* switch byte order if necessary */
74 if (ISCBIT(nbkgdc))
75 nbkgdc = _CHAR((RBYTE(nbkgdc) << 8) | (LBYTE(nbkgdc)|MBIT)) |
76 CBIT;
77 c = RBYTE(nbkgdc);
78 if ((nbkgdc < ' ' || nbkgdc == _CTRL('?')) ||
79 _curs_scrwidth[TYPE(c)] > 1)
80 nbkgdc = obkgdc;
81 nbkgd = (nbkgdc & ~CBIT) | nbkgda;
82
83 win->_bkgd = nbkgd;
84
85 /* delete the old background from the attribute field and replace */
86 /* it with the new background. Note: if the same attribute was */
87 /* first set by wbkgd() and then by wattron(), or vice versa, it */
88 /* will be deleted, so the effect of wattron() will be lost. */
89 /* This applies to both video and color attributes. */
90
91 if ((acolor = (win->_attrs & A_COLOR)) != 0) {
92 if (acolor == (obkgda & A_COLOR)) {
93 win->_attrs = _ATTR((win->_attrs & ~obkgda) | nbkgda);
94 } else {
95 win->_attrs = _ATTR((win->_attrs &
96 (~obkgda | A_COLOR)) | (nbkgda & ~A_COLOR));
97 }
98 } else
99 win->_attrs = _ATTR((win->_attrs & ~obkgda) | nbkgda);
100
101 maxx = win->_maxx - 1;
102 begch = win->_firstch;
103 endch = win->_lastch;
104 for (y = win->_maxy-1; y >= 0; --y, ++begch, ++endch) {
105 for (x = maxx, wcp = win->_y[y]; x-- >= 0; ++wcp) {
106 if ((c = _CHAR(*wcp)) == obkgdc)
107 c = nbkgdc;
108 if ((acolor = (*wcp & A_COLOR)) != 0) {
109 if (acolor == (obkgda & A_COLOR))
110 *wcp = c | _ATTR((*wcp & ~obkgda) |
111 nbkgda);
112 else
113 *wcp = c | _ATTR((*wcp & (~obkgda |
114 A_COLOR)) | (nbkgda & ~A_COLOR));
115 } else
116 *wcp = c | _ATTR((*wcp & ~obkgda) | nbkgda);
117 }
118 *begch = 0;
119 *endch = maxx;
120 }
121
122 win->_flags |= _WINCHANGED;
123 if (win->_sync)
124 wsyncup(win);
125
126 return (win->_immed ? wrefresh(win) : OK);
127 }
128