1/****************************************************************************
2 * Copyright (c) 1998-2011,2012 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
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,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
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     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 *     and: Juergen Pfeifer                         1997                    *
33 *     and: Sven Verdoolaege                        2000                    *
34 *     and: Thomas E. Dickey                        1996-on                 *
35 ****************************************************************************/
36
37#include <curses.priv.h>
38
39MODULE_ID("$Id: lib_bkgd.c,v 1.48 2012/12/09 01:01:19 tom Exp $")
40
41/*
42 * Set the window's background information.
43 */
44#if USE_WIDEC_SUPPORT
45NCURSES_EXPORT(void)
46#else
47static NCURSES_INLINE void
48#endif
49wbkgrndset(WINDOW *win, const ARG_CH_T ch)
50{
51    T((T_CALLED("wbkgdset(%p,%s)"), (void *) win, _tracech_t(ch)));
52
53    if (win) {
54	attr_t off = AttrOf(win->_nc_bkgd);
55	attr_t on = AttrOf(CHDEREF(ch));
56
57	toggle_attr_off(WINDOW_ATTRS(win), off);
58	toggle_attr_on(WINDOW_ATTRS(win), on);
59
60#if NCURSES_EXT_COLORS
61	{
62	    int pair;
63
64	    if ((pair = GetPair(win->_nc_bkgd)) != 0)
65		SET_WINDOW_PAIR(win, 0);
66	    if ((pair = GetPair(CHDEREF(ch))) != 0)
67		SET_WINDOW_PAIR(win, pair);
68	}
69#endif
70
71	if (CharOf(CHDEREF(ch)) == L('\0')) {
72	    SetChar(win->_nc_bkgd, BLANK_TEXT, AttrOf(CHDEREF(ch)));
73	    if_EXT_COLORS(SetPair(win->_nc_bkgd, GetPair(CHDEREF(ch))));
74	} else {
75	    win->_nc_bkgd = CHDEREF(ch);
76	}
77#if USE_WIDEC_SUPPORT
78	/*
79	 * If we're compiled for wide-character support, _bkgrnd is the
80	 * preferred location for the background information since it stores
81	 * more than _bkgd.  Update _bkgd each time we modify _bkgrnd, so the
82	 * macro getbkgd() will work.
83	 */
84	{
85	    cchar_t wch;
86	    int tmp;
87
88	    memset(&wch, 0, sizeof(wch));
89	    (void) wgetbkgrnd(win, &wch);
90	    tmp = _nc_to_char((wint_t) CharOf(wch));
91
92	    win->_bkgd = (((tmp == EOF) ? ' ' : (chtype) tmp)
93			  | (AttrOf(wch) & ALL_BUT_COLOR)
94			  | (chtype) ColorPair(GET_WINDOW_PAIR(win)));
95	}
96#endif
97    }
98    returnVoid;
99}
100
101NCURSES_EXPORT(void)
102wbkgdset(WINDOW *win, chtype ch)
103{
104    NCURSES_CH_T wch;
105    SetChar2(wch, ch);
106    wbkgrndset(win, CHREF(wch));
107}
108
109/*
110 * Set the window's background information and apply it to each cell.
111 */
112#if USE_WIDEC_SUPPORT
113NCURSES_EXPORT(int)
114#else
115static NCURSES_INLINE int
116#undef wbkgrnd
117#endif
118wbkgrnd(WINDOW *win, const ARG_CH_T ch)
119{
120    int code = ERR;
121    int x, y;
122
123    T((T_CALLED("wbkgd(%p,%s)"), (void *) win, _tracech_t(ch)));
124
125    if (win) {
126	NCURSES_CH_T new_bkgd = CHDEREF(ch);
127	NCURSES_CH_T old_bkgrnd;
128
129	memset(&old_bkgrnd, 0, sizeof(old_bkgrnd));
130	wgetbkgrnd(win, &old_bkgrnd);
131
132	(void) wbkgrndset(win, CHREF(new_bkgd));
133	(void) wattrset(win, (int) AttrOf(win->_nc_bkgd));
134
135	for (y = 0; y <= win->_maxy; y++) {
136	    for (x = 0; x <= win->_maxx; x++) {
137		if (CharEq(win->_line[y].text[x], old_bkgrnd)) {
138		    win->_line[y].text[x] = win->_nc_bkgd;
139		} else {
140		    NCURSES_CH_T wch = win->_line[y].text[x];
141		    RemAttr(wch, (~(A_ALTCHARSET | A_CHARTEXT)));
142		    win->_line[y].text[x] = _nc_render(win, wch);
143		}
144	    }
145	}
146	touchwin(win);
147	_nc_synchook(win);
148	code = OK;
149    }
150    returnCode(code);
151}
152
153NCURSES_EXPORT(int)
154wbkgd(WINDOW *win, chtype ch)
155{
156    NCURSES_CH_T wch;
157    SetChar2(wch, ch);
158    return wbkgrnd(win, CHREF(wch));
159}
160