diff options
Diffstat (limited to 'usr/src/lib/libcurses/screen/wbkgd.c')
| -rw-r--r-- | usr/src/lib/libcurses/screen/wbkgd.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/usr/src/lib/libcurses/screen/wbkgd.c b/usr/src/lib/libcurses/screen/wbkgd.c new file mode 100644 index 0000000000..aef5fc1e8f --- /dev/null +++ b/usr/src/lib/libcurses/screen/wbkgd.c @@ -0,0 +1,127 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 1997 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* Copyright (c) 1988 AT&T */ +/* All Rights Reserved */ + +/* + * University Copyright- Copyright (c) 1982, 1986, 1988 + * The Regents of the University of California + * All Rights Reserved + * + * University Acknowledgment- Portions of this document are derived from + * software developed by the University of California, Berkeley, and its + * contributors. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +/*LINTLIBRARY*/ + +#include <sys/types.h> +#include "curses_inc.h" + +/* Change the background of a window. nbkgd : new background. */ + +int +wbkgd(WINDOW *win, chtype nbkgd) +{ + short maxx; + int x, y; + chtype *wcp, obkgda, obkgdc, nbkgda, + nbkgdc, acolor, c; + short *begch, *endch; + + /* if 'nbkgd' contains color information, but this is not a color */ + /* terminal, erase that information. */ + + if ((nbkgd & A_COLOR) && (cur_term->_pairs_tbl == NULL)) + nbkgd &= ~A_COLOR; + + if (nbkgd == win->_bkgd) + return (OK); + + obkgdc = _CHAR(win->_bkgd); + obkgda = _ATTR(win->_bkgd); + + nbkgdc = _CHAR(nbkgd); + nbkgda = _ATTR(nbkgd); + + /* switch byte order if necessary */ + if (ISCBIT(nbkgdc)) + nbkgdc = _CHAR((RBYTE(nbkgdc) << 8) | (LBYTE(nbkgdc)|MBIT)) | + CBIT; + c = RBYTE(nbkgdc); + if ((nbkgdc < ' ' || nbkgdc == _CTRL('?')) || + _curs_scrwidth[TYPE(c)] > 1) + nbkgdc = obkgdc; + nbkgd = (nbkgdc & ~CBIT) | nbkgda; + + win->_bkgd = nbkgd; + + /* delete the old background from the attribute field and replace */ + /* it with the new background. Note: if the same attribute was */ + /* first set by wbkgd() and then by wattron(), or vice versa, it */ + /* will be deleted, so the effect of wattron() will be lost. */ + /* This applies to both video and color attributes. */ + + if ((acolor = (win->_attrs & A_COLOR)) != 0) { + if (acolor == (obkgda & A_COLOR)) { + win->_attrs = _ATTR((win->_attrs & ~obkgda) | nbkgda); + } else { + win->_attrs = _ATTR((win->_attrs & + (~obkgda | A_COLOR)) | (nbkgda & ~A_COLOR)); + } + } else + win->_attrs = _ATTR((win->_attrs & ~obkgda) | nbkgda); + + maxx = win->_maxx - 1; + begch = win->_firstch; + endch = win->_lastch; + for (y = win->_maxy-1; y >= 0; --y, ++begch, ++endch) { + for (x = maxx, wcp = win->_y[y]; x-- >= 0; ++wcp) { + if ((c = _CHAR(*wcp)) == obkgdc) + c = nbkgdc; + if ((acolor = (*wcp & A_COLOR)) != 0) { + if (acolor == (obkgda & A_COLOR)) + *wcp = c | _ATTR((*wcp & ~obkgda) | + nbkgda); + else + *wcp = c | _ATTR((*wcp & (~obkgda | + A_COLOR)) | (nbkgda & ~A_COLOR)); + } else + *wcp = c | _ATTR((*wcp & ~obkgda) | nbkgda); + } + *begch = 0; + *endch = maxx; + } + + win->_flags |= _WINCHANGED; + if (win->_sync) + wsyncup(win); + + return (win->_immed ? wrefresh(win) : OK); +} |