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 /*LINTLIBRARY*/
41
42 #include <sys/types.h>
43 #include "curses_inc.h"
44
45 /* Change the background of a window. nbkgd : new background. */
46
47 int
wbkgd(WINDOW * win,chtype nbkgd)48 wbkgd(WINDOW *win, chtype nbkgd)
49 {
50 short maxx;
51 int x, y;
52 chtype *wcp, obkgda, obkgdc, nbkgda,
53 nbkgdc, acolor, c;
54 short *begch, *endch;
55
56 /* if 'nbkgd' contains color information, but this is not a color */
57 /* terminal, erase that information. */
58
59 if ((nbkgd & A_COLOR) && (cur_term->_pairs_tbl == NULL))
60 nbkgd &= ~A_COLOR;
61
62 if (nbkgd == win->_bkgd)
63 return (OK);
64
65 obkgdc = _CHAR(win->_bkgd);
66 obkgda = _ATTR(win->_bkgd);
67
68 nbkgdc = _CHAR(nbkgd);
69 nbkgda = _ATTR(nbkgd);
70
71 /* switch byte order if necessary */
72 if (ISCBIT(nbkgdc))
73 nbkgdc = _CHAR((RBYTE(nbkgdc) << 8) | (LBYTE(nbkgdc)|MBIT)) |
74 CBIT;
75 c = RBYTE(nbkgdc);
76 if ((nbkgdc < ' ' || nbkgdc == _CTRL('?')) ||
77 _curs_scrwidth[TYPE(c)] > 1)
78 nbkgdc = obkgdc;
79 nbkgd = (nbkgdc & ~CBIT) | nbkgda;
80
81 win->_bkgd = nbkgd;
82
83 /* delete the old background from the attribute field and replace */
84 /* it with the new background. Note: if the same attribute was */
85 /* first set by wbkgd() and then by wattron(), or vice versa, it */
86 /* will be deleted, so the effect of wattron() will be lost. */
87 /* This applies to both video and color attributes. */
88
89 if ((acolor = (win->_attrs & A_COLOR)) != 0) {
90 if (acolor == (obkgda & A_COLOR)) {
91 win->_attrs = _ATTR((win->_attrs & ~obkgda) | nbkgda);
92 } else {
93 win->_attrs = _ATTR((win->_attrs &
94 (~obkgda | A_COLOR)) | (nbkgda & ~A_COLOR));
95 }
96 } else
97 win->_attrs = _ATTR((win->_attrs & ~obkgda) | nbkgda);
98
99 maxx = win->_maxx - 1;
100 begch = win->_firstch;
101 endch = win->_lastch;
102 for (y = win->_maxy-1; y >= 0; --y, ++begch, ++endch) {
103 for (x = maxx, wcp = win->_y[y]; x-- >= 0; ++wcp) {
104 if ((c = _CHAR(*wcp)) == obkgdc)
105 c = nbkgdc;
106 if ((acolor = (*wcp & A_COLOR)) != 0) {
107 if (acolor == (obkgda & A_COLOR))
108 *wcp = c | _ATTR((*wcp & ~obkgda) |
109 nbkgda);
110 else
111 *wcp = c | _ATTR((*wcp & (~obkgda |
112 A_COLOR)) | (nbkgda & ~A_COLOR));
113 } else
114 *wcp = c | _ATTR((*wcp & ~obkgda) | nbkgda);
115 }
116 *begch = 0;
117 *endch = maxx;
118 }
119
120 win->_flags |= _WINCHANGED;
121 if (win->_sync)
122 wsyncup(win);
123
124 return (win->_immed ? wrefresh(win) : OK);
125 }
126