OpenBSD-4.6/lib/libcurses/base/lib_bkgd.c

/*	$OpenBSD: lib_bkgd.c,v 1.2 2001/01/22 18:01:37 millert Exp $	*/

/****************************************************************************
 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
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 ****************************************************************************/

/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 ****************************************************************************/

#include <curses.priv.h>

MODULE_ID("$From: lib_bkgd.c,v 1.14 2000/12/10 02:43:26 tom Exp $")

NCURSES_EXPORT(void)
wbkgdset(WINDOW *win, chtype ch)
{
    T((T_CALLED("wbkgdset(%p,%s)"), win, _tracechtype(ch)));

    if (win) {
	chtype off = AttrOf(win->_bkgd);
	chtype on = AttrOf(ch);

	toggle_attr_off(win->_attrs, off);
	toggle_attr_on(win->_attrs, on);

	if (TextOf(ch) == 0)
	    ch |= BLANK;
	win->_bkgd = ch;
    }
    returnVoid;
}

NCURSES_EXPORT(int)
wbkgd(WINDOW *win, const chtype ch)
{
    int code = ERR;
    int x, y;
    chtype new_bkgd = ch;

    T((T_CALLED("wbkgd(%p,%s)"), win, _tracechtype(new_bkgd)));

    if (win) {
	chtype old_bkgd = getbkgd(win);

	wbkgdset(win, new_bkgd);
	wattrset(win, AttrOf(win->_bkgd));

	for (y = 0; y <= win->_maxy; y++) {
	    for (x = 0; x <= win->_maxx; x++) {
		if (win->_line[y].text[x] == old_bkgd)
		    win->_line[y].text[x] = win->_bkgd;
		else
		    win->_line[y].text[x] =
			_nc_render(win, (A_ALTCHARSET &
					 AttrOf(win->_line[y].text[x]))
				   | TextOf(win->_line[y].text[x]));
	    }
	}
	touchwin(win);
	_nc_synchook(win);
	code = OK;
    }
    returnCode(code);
}