| /**************************************************************************** |
| * Copyright 2018-2019,2020 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 1.54 2020/02/02 23:34:34 tom Exp $") |
| |
| /* |
| * 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)"), (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; |
| } |
| |
| NCURSES_EXPORT(void) |
| wbkgdset(WINDOW *win, chtype ch) |
| { |
| NCURSES_CH_T wch; |
| SetChar2(wch, ch); |
| wbkgrndset(win, CHREF(wch)); |
| } |
| |
| /* |
| * Set the window's background information and apply it to each cell. |
| */ |
| #if USE_WIDEC_SUPPORT |
| NCURSES_EXPORT(int) |
| #else |
| static NCURSES_INLINE int |
| #undef wbkgrnd |
| #endif |
| wbkgrnd(WINDOW *win, const ARG_CH_T ch) |
| { |
| #undef SP_PARM |
| #define SP_PARM SP /* to use Charable() */ |
| int code = ERR; |
| |
| T((T_CALLED("wbkgd(%p,%s)"), (void *) win, _tracech_t(ch))); |
| |
| 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); |
| } |
| |
| 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(CharOf(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 (!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(CharOf(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)) { |
| 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); |
| } |
| |
| NCURSES_EXPORT(int) |
| wbkgd(WINDOW *win, chtype ch) |
| { |
| NCURSES_CH_T wch; |
| SetChar2(wch, ch); |
| return wbkgrnd(win, CHREF(wch)); |
| } |
