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/****************************************************************************
* Copyright 2018-2020,2021 Thomas E. Dickey *
* Copyright 1998-2014,2016 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 *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Juergen Pfeifer 1997 *
* and: Sven Verdoolaege 2000 *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
#include <curses.priv.h>
MODULE_ID("$Id: lib_bkgd.c,v 1.63 2021/05/08 14:58:12 tom Exp $")
static const NCURSES_CH_T blank = NewChar(BLANK_TEXT);
/*
* Set the window's background information.
*/
#if USE_WIDEC_SUPPORT
NCURSES_EXPORT(void)
#else
static NCURSES_INLINE void
#endif
wbkgrndset(WINDOW *win, const ARG_CH_T ch)
{
T((T_CALLED("wbkgrndset(%p,%s)"), (void *) win, _tracech_t(ch)));
if (win) {
attr_t off = AttrOf(win->_nc_bkgd);
attr_t on = AttrOf(CHDEREF(ch));
toggle_attr_off(WINDOW_ATTRS(win), off);
toggle_attr_on(WINDOW_ATTRS(win), on);
#if NCURSES_EXT_COLORS
{
int pair;
if (GetPair(win->_nc_bkgd) != 0)
SET_WINDOW_PAIR(win, 0);
if ((pair = GetPair(CHDEREF(ch))) != 0)
SET_WINDOW_PAIR(win, pair);
}
#endif
if (CharOf(CHDEREF(ch)) == L('\0')) {
SetChar(win->_nc_bkgd, BLANK_TEXT, AttrOf(CHDEREF(ch)));
if_EXT_COLORS(SetPair(win->_nc_bkgd, GetPair(CHDEREF(ch))));
} else {
win->_nc_bkgd = CHDEREF(ch);
}
#if USE_WIDEC_SUPPORT
/*
* If we're compiled for wide-character support, _bkgrnd is the
* preferred location for the background information since it stores
* more than _bkgd. Update _bkgd each time we modify _bkgrnd, so the
* macro getbkgd() will work.
*/
{
cchar_t wch;
int tmp;
memset(&wch, 0, sizeof(wch));
(void) wgetbkgrnd(win, &wch);
tmp = _nc_to_char((wint_t) CharOf(wch));
win->_bkgd = (((tmp == EOF) ? ' ' : (chtype) tmp)
| (AttrOf(wch) & ALL_BUT_COLOR)
| (chtype) ColorPair(GET_WINDOW_PAIR(win)));
}
#endif
}
returnVoid;
}
NCURSES_EXPORT(void)
wbkgdset(WINDOW *win, chtype ch)
{
NCURSES_CH_T wch;
T((T_CALLED("wbkgdset(%p,%s)"), (void *) win, _tracechtype(ch)));
SetChar2(wch, ch);
wbkgrndset(win, CHREF(wch));
returnVoid;
}
/*
* Set the window's background information and apply it to each cell.
*/
static NCURSES_INLINE int
_nc_background(WINDOW *win, const ARG_CH_T ch, bool narrow)
{
#undef SP_PARM
#define SP_PARM SP /* to use Charable() */
int code = ERR;
#if USE_WIDEC_SUPPORT
T((T_CALLED("%s(%p,%s)"),
narrow ? "wbkgd" : "wbkgrnd",
(void *) win,
_tracecchar_t(ch)));
#define TraceChar(c) _tracecchar_t2(1, &(c))
#else
T((T_CALLED("%s(%p,%s)"),
"wbkgd",
(void *) win,
_tracech_t(ch)));
(void) narrow;
#define TraceChar(c) _tracechar(CharOf(c))
#endif
if (SP == 0) {
;
} else if (win) {
NCURSES_CH_T new_bkgd = CHDEREF(ch);
NCURSES_CH_T old_bkgd;
int y;
NCURSES_CH_T old_char;
attr_t old_attr;
int old_pair;
NCURSES_CH_T new_char;
attr_t new_attr;
int new_pair;
/* SVr4 trims color info if non-color terminal */
if (!SP->_pair_limit) {
RemAttr(new_bkgd, A_COLOR);
SetPair(new_bkgd, 0);
}
/* avoid setting background-character to a null */
if (CharOf(new_bkgd) == 0) {
NCURSES_CH_T tmp_bkgd = blank;
SetAttr(tmp_bkgd, AttrOf(new_bkgd));
SetPair(tmp_bkgd, GetPair(new_bkgd));
new_bkgd = tmp_bkgd;
}
memset(&old_bkgd, 0, sizeof(old_bkgd));
(void) wgetbkgrnd(win, &old_bkgd);
if (!memcmp(&old_bkgd, &new_bkgd, sizeof(new_bkgd))) {
T(("...unchanged"));
returnCode(OK);
}
old_char = old_bkgd;
RemAttr(old_char, ~A_CHARTEXT);
old_attr = AttrOf(old_bkgd);
old_pair = GetPair(old_bkgd);
if (!(old_attr & A_COLOR)) {
old_pair = 0;
}
T(("... old background char %s, attr %s, pair %d",
TraceChar(old_char), _traceattr(old_attr), old_pair));
new_char = new_bkgd;
RemAttr(new_char, ~A_CHARTEXT);
new_attr = AttrOf(new_bkgd);
new_pair = GetPair(new_bkgd);
/* SVr4 limits background character to printable 7-bits */
if (
#if USE_WIDEC_SUPPORT
narrow &&
#endif
!Charable(new_bkgd)) {
new_char = old_char;
}
if (!(new_attr & A_COLOR)) {
new_pair = 0;
}
T(("... new background char %s, attr %s, pair %d",
TraceChar(new_char), _traceattr(new_attr), new_pair));
(void) wbkgrndset(win, CHREF(new_bkgd));
/* SVr4 updates color pair if old/new match, otherwise just attrs */
if ((new_pair != 0) && (new_pair == old_pair)) {
WINDOW_ATTRS(win) = new_attr;
SET_WINDOW_PAIR(win, new_pair);
} else {
WINDOW_ATTRS(win) = new_attr;
}
for (y = 0; y <= win->_maxy; y++) {
int x;
for (x = 0; x <= win->_maxx; x++) {
NCURSES_CH_T *cp = &(win->_line[y].text[x]);
int tmp_pair = GetPair(*cp);
attr_t tmp_attr = AttrOf(*cp);
if (CharEq(*cp, old_bkgd)) {
#if USE_WIDEC_SUPPORT
if (!narrow) {
if (Charable(new_bkgd)) {
SetChar2(*cp, CharOf(new_char));
} else {
SetChar(*cp, L' ', AttrOf(new_char));
}
memcpy(cp->chars,
new_char.chars,
CCHARW_MAX * sizeof(cp->chars[0]));
} else
#endif
SetChar2(*cp, CharOf(new_char));
}
if (tmp_pair != 0) {
if (tmp_pair == old_pair) {
SetAttr(*cp, (tmp_attr & ~old_attr) | new_attr);
SetPair(*cp, new_pair);
} else {
SetAttr(*cp,
(tmp_attr & (~old_attr | A_COLOR))
| (new_attr & ALL_BUT_COLOR));
}
} else {
SetAttr(*cp, (tmp_attr & ~old_attr) | new_attr);
SetPair(*cp, new_pair);
}
}
}
touchwin(win);
_nc_synchook(win);
code = OK;
}
returnCode(code);
}
#if USE_WIDEC_SUPPORT
NCURSES_EXPORT(int)
wbkgrnd(WINDOW *win, const ARG_CH_T ch)
{
return _nc_background(win, ch, FALSE);
}
#endif
NCURSES_EXPORT(int)
wbkgd(WINDOW *win, chtype ch)
{
NCURSES_CH_T wch;
SetChar2(wch, ch);
return _nc_background(win, CHREF(wch), TRUE);
}
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