1 /**************************************************************************** 2 * Copyright 2018-2019,2020 Thomas E. Dickey * 3 * Copyright 1998-2014,2016 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 32 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 33 * and: Juergen Pfeifer 1997 * 34 * and: Sven Verdoolaege 2000 * 35 * and: Thomas E. Dickey 1996-on * 36 ****************************************************************************/ 37 38 #include <curses.priv.h> 39 40 MODULE_ID("$Id: lib_bkgd.c,v 1.54 2020/02/02 23:34:34 tom Exp $") 41 42 /* 43 * Set the window's background information. 44 */ 45 #if USE_WIDEC_SUPPORT 46 NCURSES_EXPORT(void) 47 #else 48 static NCURSES_INLINE void 49 #endif 50 wbkgrndset(WINDOW *win, const ARG_CH_T ch) 51 { 52 T((T_CALLED("wbkgdset(%p,%s)"), (void *) win, _tracech_t(ch))); 53 54 if (win) { 55 attr_t off = AttrOf(win->_nc_bkgd); 56 attr_t on = AttrOf(CHDEREF(ch)); 57 58 toggle_attr_off(WINDOW_ATTRS(win), off); 59 toggle_attr_on(WINDOW_ATTRS(win), on); 60 61 #if NCURSES_EXT_COLORS 62 { 63 int pair; 64 65 if ((pair = GetPair(win->_nc_bkgd)) != 0) 66 SET_WINDOW_PAIR(win, 0); 67 if ((pair = GetPair(CHDEREF(ch))) != 0) 68 SET_WINDOW_PAIR(win, pair); 69 } 70 #endif 71 72 if (CharOf(CHDEREF(ch)) == L('\0')) { 73 SetChar(win->_nc_bkgd, BLANK_TEXT, AttrOf(CHDEREF(ch))); 74 if_EXT_COLORS(SetPair(win->_nc_bkgd, GetPair(CHDEREF(ch)))); 75 } else { 76 win->_nc_bkgd = CHDEREF(ch); 77 } 78 #if USE_WIDEC_SUPPORT 79 /* 80 * If we're compiled for wide-character support, _bkgrnd is the 81 * preferred location for the background information since it stores 82 * more than _bkgd. Update _bkgd each time we modify _bkgrnd, so the 83 * macro getbkgd() will work. 84 */ 85 { 86 cchar_t wch; 87 int tmp; 88 89 memset(&wch, 0, sizeof(wch)); 90 (void) wgetbkgrnd(win, &wch); 91 tmp = _nc_to_char((wint_t) CharOf(wch)); 92 93 win->_bkgd = (((tmp == EOF) ? ' ' : (chtype) tmp) 94 | (AttrOf(wch) & ALL_BUT_COLOR) 95 | (chtype) ColorPair(GET_WINDOW_PAIR(win))); 96 } 97 #endif 98 } 99 returnVoid; 100 } 101 102 NCURSES_EXPORT(void) 103 wbkgdset(WINDOW *win, chtype ch) 104 { 105 NCURSES_CH_T wch; 106 SetChar2(wch, ch); 107 wbkgrndset(win, CHREF(wch)); 108 } 109 110 /* 111 * Set the window's background information and apply it to each cell. 112 */ 113 #if USE_WIDEC_SUPPORT 114 NCURSES_EXPORT(int) 115 #else 116 static NCURSES_INLINE int 117 #undef wbkgrnd 118 #endif 119 wbkgrnd(WINDOW *win, const ARG_CH_T ch) 120 { 121 #undef SP_PARM 122 #define SP_PARM SP /* to use Charable() */ 123 int code = ERR; 124 125 T((T_CALLED("wbkgd(%p,%s)"), (void *) win, _tracech_t(ch))); 126 127 if (SP == 0) { 128 ; 129 } else if (win) { 130 NCURSES_CH_T new_bkgd = CHDEREF(ch); 131 NCURSES_CH_T old_bkgd; 132 int y; 133 NCURSES_CH_T old_char; 134 attr_t old_attr; 135 int old_pair; 136 NCURSES_CH_T new_char; 137 attr_t new_attr; 138 int new_pair; 139 140 /* SVr4 trims color info if non-color terminal */ 141 if (!SP->_pair_limit) { 142 RemAttr(new_bkgd, A_COLOR); 143 SetPair(new_bkgd, 0); 144 } 145 146 memset(&old_bkgd, 0, sizeof(old_bkgd)); 147 (void) wgetbkgrnd(win, &old_bkgd); 148 149 if (!memcmp(&old_bkgd, &new_bkgd, sizeof(new_bkgd))) { 150 T(("...unchanged")); 151 returnCode(OK); 152 } 153 154 old_char = old_bkgd; 155 RemAttr(old_char, ~A_CHARTEXT); 156 old_attr = AttrOf(old_bkgd); 157 old_pair = GetPair(old_bkgd); 158 159 if (!(old_attr & A_COLOR)) { 160 old_pair = 0; 161 } 162 T(("... old background char %s, attr %s, pair %d", 163 _tracechar(CharOf(old_char)), _traceattr(old_attr), old_pair)); 164 165 new_char = new_bkgd; 166 RemAttr(new_char, ~A_CHARTEXT); 167 new_attr = AttrOf(new_bkgd); 168 new_pair = GetPair(new_bkgd); 169 170 /* SVr4 limits background character to printable 7-bits */ 171 if (!Charable(new_bkgd)) { 172 new_char = old_char; 173 } 174 if (!(new_attr & A_COLOR)) { 175 new_pair = 0; 176 } 177 T(("... new background char %s, attr %s, pair %d", 178 _tracechar(CharOf(new_char)), _traceattr(new_attr), new_pair)); 179 180 (void) wbkgrndset(win, CHREF(new_bkgd)); 181 182 /* SVr4 updates color pair if old/new match, otherwise just attrs */ 183 if ((new_pair != 0) && (new_pair == old_pair)) { 184 WINDOW_ATTRS(win) = new_attr; 185 SET_WINDOW_PAIR(win, new_pair); 186 } else { 187 WINDOW_ATTRS(win) = new_attr; 188 } 189 190 for (y = 0; y <= win->_maxy; y++) { 191 int x; 192 193 for (x = 0; x <= win->_maxx; x++) { 194 NCURSES_CH_T *cp = &(win->_line[y].text[x]); 195 int tmp_pair = GetPair(*cp); 196 attr_t tmp_attr = AttrOf(*cp); 197 198 if (CharEq(*cp, old_bkgd)) { 199 SetChar2(*cp, CharOf(new_char)); 200 } 201 if (tmp_pair != 0) { 202 if (tmp_pair == old_pair) { 203 SetAttr(*cp, (tmp_attr & ~old_attr) | new_attr); 204 SetPair(*cp, new_pair); 205 } else { 206 SetAttr(*cp, 207 (tmp_attr & (~old_attr | A_COLOR)) 208 | (new_attr & ALL_BUT_COLOR)); 209 } 210 } else { 211 SetAttr(*cp, (tmp_attr & ~old_attr) | new_attr); 212 SetPair(*cp, new_pair); 213 } 214 } 215 } 216 touchwin(win); 217 _nc_synchook(win); 218 code = OK; 219 } 220 returnCode(code); 221 } 222 223 NCURSES_EXPORT(int) 224 wbkgd(WINDOW *win, chtype ch) 225 { 226 NCURSES_CH_T wch; 227 SetChar2(wch, ch); 228 return wbkgrnd(win, CHREF(wch)); 229 } 230