lib_bkgd.c revision 50276 
1/****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
3 *                                                                          *
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5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
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9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
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28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34#include <curses.priv.h>
35
36MODULE_ID("$Id: lib_bkgd.c,v 1.12 1998/02/11 12:13:54 tom Exp $")
37
38void wbkgdset(WINDOW *win, chtype ch)
39{
40  T((T_CALLED("wbkgdset(%p,%s)"), win, _tracechtype(ch)));
41
42  if (win) {
43    chtype off = AttrOf(win->_bkgd);
44    chtype on  = AttrOf(ch);
45
46    toggle_attr_off(win->_attrs,off);
47    toggle_attr_on (win->_attrs,on);
48
49    if (TextOf(ch)==0)
50      ch |= BLANK;
51    win->_bkgd = ch;
52  }
53  returnVoid;
54}
55
56int wbkgd(WINDOW *win, const chtype ch)
57{
58  int code = ERR;
59  int x, y;
60  chtype new_bkgd = ch;
61
62  T((T_CALLED("wbkgd(%p,%s)"), win, _tracechtype(new_bkgd)));
63
64  if (win) {
65    chtype old_bkgd = getbkgd(win);
66
67    wbkgdset(win, new_bkgd);
68    wattrset(win, AttrOf(win->_bkgd));
69
70    for (y = 0; y <= win->_maxy; y++) {
71      for (x = 0; x <= win->_maxx; x++) {
72	if (win->_line[y].text[x] == old_bkgd)
73	  win->_line[y].text[x] = win->_bkgd;
74	else
75	  win->_line[y].text[x] =
76	    _nc_render(win,(A_ALTCHARSET &
77			    AttrOf(win->_line[y].text[x]))
78		       | TextOf(win->_line[y].text[x]));
79      }
80    }
81    touchwin(win);
82    _nc_synchook(win);
83    code = OK;
84  }
85  returnCode(code);
86}
87