/* $OpenBSD: lib_bkgd.c,v 1.4 2023/10/17 09:52:08 nicm Exp $ */ /**************************************************************************** * 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 1992,1995 * * and: Eric S. Raymond * * and: Juergen Pfeifer 1997 * * and: Sven Verdoolaege 2000 * * and: Thomas E. Dickey 1996-on * ****************************************************************************/ #include MODULE_ID("$Id: lib_bkgd.c,v 1.4 2023/10/17 09:52:08 nicm 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); }