xref: /titanic_41/usr/src/lib/libcurses/screen/wattroff.c (revision 843e19887f64dde75055cf8842fc4db2171eff45)
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 int
48 wattroff(WINDOW *win, chtype a)
49 {
50 	/* if attribute contains color information, but this is not a color  */
51 	/* terminal, or that color information doesn't match the one stored  */
52 	/* inside _attrs,  ignore that information.			   */
53 
54 	if (((a & A_COLOR) && (cur_term->_pairs_tbl == NULL)) ||
55 	    ((a & A_COLOR) != (win->_attrs & A_COLOR)))
56 		a &= ~A_COLOR;
57 
58 	if ((a & A_ATTRIBUTES) == A_NORMAL)
59 		return (1);
60 
61 	/* turn off the attributes		*/
62 
63 	win->_attrs &= ~a & A_ATTRIBUTES;
64 
65 	/* if background contains color information different from the one */
66 	/* we have just turned off, turn that color on.  (Reason: the	*/
67 	/* color we have just turned off was set by wattron(), so the	*/
68 	/* back-ground color was blocked.  However, now the background	*/
69 	/* color can be seen.						*/
70 
71 	if ((a & A_COLOR) && ((a & A_COLOR) != (win->_bkgd & A_COLOR)))
72 		win->_attrs |= (win->_bkgd & A_COLOR);
73 
74 	return (1);
75 }
76