background.c revision 1.19
1 /* $NetBSD: background.c,v 1.19 2018/11/18 20:26:29 uwe Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Julian Coleman. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __RCSID("$NetBSD: background.c,v 1.19 2018/11/18 20:26:29 uwe Exp $"); 35 #endif /* not lint */ 36 37 #include <stdlib.h> 38 #include "curses.h" 39 #include "curses_private.h" 40 41 /* 42 * bkgdset 43 * Set new background attributes on stdscr. 44 */ 45 void 46 bkgdset(chtype ch) 47 { 48 wbkgdset(stdscr, ch); 49 } 50 51 /* 52 * bkgd -- 53 * Set new background attributes on stdscr and apply them to its 54 * contents. 55 */ 56 int 57 bkgd(chtype ch) 58 { 59 return(wbkgd(stdscr, ch)); 60 } 61 62 /* 63 * wbkgdset 64 * Set new background attributes on the specified window. 65 */ 66 void 67 wbkgdset(WINDOW *win, chtype ch) 68 { 69 #ifdef DEBUG 70 __CTRACE(__CTRACE_ATTR, "wbkgdset: (%p), '%s', %08x\n", 71 win, unctrl(ch & __CHARTEXT), ch & __ATTRIBUTES); 72 #endif 73 74 /* Background character. */ 75 if (ch & __CHARTEXT) 76 win->bch = (wchar_t) ch & __CHARTEXT; 77 78 /* Background attributes (check colour). */ 79 if (__using_color && !(ch & __COLOR)) 80 ch |= __default_color; 81 win->battr = (attr_t) ch & __ATTRIBUTES; 82 } 83 84 /* 85 * wbkgd -- 86 * Set new background attributes on the specified window and 87 * apply them to its contents. 88 */ 89 int 90 wbkgd(WINDOW *win, chtype ch) 91 { 92 int y, x; 93 94 #ifdef DEBUG 95 __CTRACE(__CTRACE_ATTR, "wbkgd: (%p), '%s', %08x\n", 96 win, unctrl(ch & __CHARTEXT), ch & __ATTRIBUTES); 97 #endif 98 99 /* Background attributes (check colour). */ 100 if (__using_color && !(ch & __COLOR)) 101 ch |= __default_color; 102 103 win->battr = (attr_t) ch & __ATTRIBUTES; 104 wbkgdset(win, ch); 105 for (y = 0; y < win->maxy; y++) 106 for (x = 0; x < win->maxx; x++) { 107 /* Copy character if space */ 108 if (ch & __CHARTEXT && win->alines[y]->line[x].ch == ' ') 109 win->alines[y]->line[x].ch = ch & __CHARTEXT; 110 /* Merge attributes */ 111 if (win->alines[y]->line[x].attr & __ALTCHARSET) 112 win->alines[y]->line[x].attr = 113 (ch & __ATTRIBUTES) | __ALTCHARSET; 114 else 115 win->alines[y]->line[x].attr = 116 ch & __ATTRIBUTES; 117 #ifdef HAVE_WCHAR 118 SET_WCOL(win->alines[y]->line[x], 1); 119 #endif 120 } 121 __touchwin(win); 122 return(OK); 123 } 124 125 /* 126 * getbkgd -- 127 * Get current background attributes. 128 */ 129 chtype 130 getbkgd(WINDOW *win) 131 { 132 attr_t battr; 133 134 /* Background attributes (check colour). */ 135 battr = win->battr & A_ATTRIBUTES; 136 if (__using_color && ((battr & __COLOR) == __default_color)) 137 battr &= ~__default_color; 138 139 return ((chtype) ((win->bch & A_CHARTEXT) | battr)); 140 } 141 142 int bkgrnd(const cchar_t *wch) 143 { 144 #ifndef HAVE_WCHAR 145 return ERR; 146 #else 147 return wbkgrnd( stdscr, wch ); 148 #endif /* HAVE_WCHAR */ 149 } 150 151 void bkgrndset(const cchar_t *wch) 152 { 153 #ifdef HAVE_WCHAR 154 wbkgrndset( stdscr, wch ); 155 #endif /* HAVE_WCHAR */ 156 } 157 158 int getbkgrnd(cchar_t *wch) 159 { 160 #ifndef HAVE_WCHAR 161 return ERR; 162 #else 163 return wgetbkgrnd( stdscr, wch ); 164 #endif /* HAVE_WCHAR */ 165 } 166 167 int wbkgrnd(WINDOW *win, const cchar_t *wch) 168 { 169 #ifndef HAVE_WCHAR 170 return ERR; 171 #else 172 /* int y, x, i; */ 173 attr_t battr; 174 /* nschar_t *np, *tnp, *pnp; */ 175 176 #ifdef DEBUG 177 __CTRACE(__CTRACE_ATTR, "wbkgrnd: (%p), '%s', %x\n", 178 win, (const char *) wunctrl(wch), wch->attributes); 179 #endif 180 181 /* ignore multi-column characters */ 182 if (!wch->elements || wcwidth( wch->vals[ 0 ]) > 1) 183 return ERR; 184 185 /* Background attributes (check colour). */ 186 battr = wch->attributes & WA_ATTRIBUTES; 187 if (__using_color && !( battr & __COLOR)) 188 battr |= __default_color; 189 190 win->battr = battr; 191 wbkgrndset(win, wch); 192 __touchwin(win); 193 return OK; 194 #endif /* HAVE_WCHAR */ 195 } 196 197 void wbkgrndset(WINDOW *win, const cchar_t *wch) 198 { 199 #ifdef HAVE_WCHAR 200 attr_t battr; 201 nschar_t *np, *tnp; 202 int i; 203 204 #ifdef DEBUG 205 __CTRACE(__CTRACE_ATTR, "wbkgrndset: (%p), '%s', %x\n", 206 win, (const char *) wunctrl(wch), wch->attributes); 207 #endif 208 209 /* ignore multi-column characters */ 210 if (!wch->elements || wcwidth(wch->vals[0]) > 1) 211 return; 212 213 /* Background character. */ 214 tnp = np = win->bnsp; 215 if (wcwidth( wch->vals[0])) 216 win->bch = wch->vals[0]; 217 else { 218 if (!np) { 219 np = malloc(sizeof(nschar_t)); 220 if (!np) 221 return; 222 np->next = NULL; 223 win->bnsp = np; 224 } 225 np->ch = wch->vals[0]; 226 tnp = np; 227 np = np->next; 228 } 229 /* add non-spacing characters */ 230 if (wch->elements > 1) { 231 for (i = 1; i < wch->elements; i++) { 232 if ( !np ) { 233 np = malloc(sizeof(nschar_t)); 234 if (!np) 235 return; 236 np->next = NULL; 237 if (tnp) 238 tnp->next = np; 239 else 240 win->bnsp = np; 241 } 242 np->ch = wch->vals[i]; 243 tnp = np; 244 np = np->next; 245 } 246 } 247 /* clear the old non-spacing characters */ 248 while (np) { 249 tnp = np->next; 250 free(np); 251 np = tnp; 252 } 253 254 /* Background attributes (check colour). */ 255 battr = wch->attributes & WA_ATTRIBUTES; 256 if (__using_color && !( battr & __COLOR)) 257 battr |= __default_color; 258 win->battr = battr; 259 SET_BGWCOL((*win), 1); 260 #endif /* HAVE_WCHAR */ 261 } 262 263 int wgetbkgrnd(WINDOW *win, cchar_t *wch) 264 { 265 #ifndef HAVE_WCHAR 266 return ERR; 267 #else 268 nschar_t *np; 269 270 /* Background attributes (check colour). */ 271 wch->attributes = win->battr & WA_ATTRIBUTES; 272 if (__using_color && ((wch->attributes & __COLOR) 273 == __default_color)) 274 wch->attributes &= ~__default_color; 275 wch->vals[0] = win->bch; 276 wch->elements = 1; 277 np = win->bnsp; 278 if (np) { 279 while (np && wch->elements < CURSES_CCHAR_MAX) { 280 wch->vals[wch->elements++] = np->ch; 281 np = np->next; 282 } 283 } 284 285 return OK; 286 #endif /* HAVE_WCHAR */ 287 } 288
Indexes created Thu Sep 25 08:09:54 GMT 2025