usr/src/lib/libcurses/screen/wattroff.c

   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 }