X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=ncurses%2Fbase%2Flib_bkgd.c;h=1dcae90d6ad955c1576f46a556fb54635d078a18;hp=410ee0580433b6d7a91015b4cbf8c6b9c46e19aa;hb=dafd158641767f37aa900c195aaa77b27da38500;hpb=0eb88fc5281804773e2a0c7a488a4452463535ce;ds=sidebyside diff --git a/ncurses/base/lib_bkgd.c b/ncurses/base/lib_bkgd.c index 410ee058..1dcae90d 100644 --- a/ncurses/base/lib_bkgd.c +++ b/ncurses/base/lib_bkgd.c @@ -1,5 +1,6 @@ /**************************************************************************** - * Copyright (c) 1998 Free Software Foundation, Inc. * + * 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 * @@ -29,58 +30,210 @@ /**************************************************************************** * 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 1.12 1998/02/11 12:13:54 tom Exp $") +MODULE_ID("$Id: lib_bkgd.c,v 1.55 2020/03/02 01:34:48 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("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)); } -int wbkgd(WINDOW *win, const chtype ch) +/* + * 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) { - 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])); - } +#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); + } + + /* 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(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; } - touchwin(win); - _nc_synchook(win); - code = OK; - } - returnCode(code); + returnCode(code); +} + +NCURSES_EXPORT(int) +wbkgd(WINDOW *win, chtype ch) +{ + NCURSES_CH_T wch; + SetChar2(wch, ch); + return wbkgrnd(win, CHREF(wch)); }