/****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc. *
+ * 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 *
/****************************************************************************
* 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 1.12 1998/02/11 12:13:54 tom Exp $")
+MODULE_ID("$Id: lib_bkgd.c,v 1.62 2021/02/13 20:06:54 tom Exp $")
-void wbkgdset(WINDOW *win, chtype ch)
+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("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;
+ 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 ((pair = 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;
}
-int wbkgd(WINDOW *win, const chtype ch)
+NCURSES_EXPORT(void)
+wbkgdset(WINDOW *win, 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]));
- }
+ 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;
}
- touchwin(win);
- _nc_synchook(win);
- code = OK;
- }
- returnCode(code);
+ 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);
}
projects / ncurses.git / blobdiff