1 /* $NetBSD: ins_wstr.c,v 1.25 2024/12/23 02:58:03 blymn Exp $ */ 2 3 /* 4 * Copyright (c) 2005 The NetBSD Foundation Inc. 5 * All rights reserved. 6 * 7 * This code is derived from code donated to the NetBSD Foundation 8 * by Ruibiao Qiu <ruibiao@arl.wustl.edu,ruibiao@gmail.com>. 9 * 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 24 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 25 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: ins_wstr.c,v 1.25 2024/12/23 02:58:03 blymn Exp $"); 40 #endif /* not lint */ 41 42 #include <string.h> 43 #include <stdlib.h> 44 45 #include "curses.h" 46 #include "curses_private.h" 47 48 /* 49 * ins_wstr -- 50 * insert a multi-character wide-character string into the current window 51 */ 52 int 53 ins_wstr(const wchar_t *wstr) 54 { 55 return wins_wstr(stdscr, wstr); 56 } 57 58 /* 59 * ins_nwstr -- 60 * insert a multi-character wide-character string into the current window 61 * with at most n characters 62 */ 63 int 64 ins_nwstr(const wchar_t *wstr, int n) 65 { 66 return wins_nwstr(stdscr, wstr, n); 67 } 68 69 /* 70 * mvins_wstr -- 71 * Do an insert-string on the line at (y, x). 72 */ 73 int 74 mvins_wstr(int y, int x, const wchar_t *wstr) 75 { 76 return mvwins_wstr(stdscr, y, x, wstr); 77 } 78 79 /* 80 * mvins_nwstr -- 81 * Do an insert-n-string on the line at (y, x). 82 */ 83 int 84 mvins_nwstr(int y, int x, const wchar_t *wstr, int n) 85 { 86 return mvwins_nwstr(stdscr, y, x, wstr, n); 87 } 88 89 /* 90 * mvwins_wstr -- 91 * Do an insert-string on the line at (y, x) in the given window. 92 */ 93 int 94 mvwins_wstr(WINDOW *win, int y, int x, const wchar_t *wstr) 95 { 96 if (wmove(win, y, x) == ERR) 97 return ERR; 98 99 return wins_wstr(win, wstr); 100 } 101 102 /* 103 * mvwins_nwstr -- 104 * Do an insert-n-string on the line at (y, x) in the given window. 105 */ 106 int 107 mvwins_nwstr(WINDOW *win, int y, int x, const wchar_t *wstr, int n) 108 { 109 if (wmove(win, y, x) == ERR) 110 return ERR; 111 112 return wins_nwstr(win, wstr, n); 113 } 114 115 116 /* 117 * wins_wstr -- 118 * Do an insert-string on the line, leaving (cury, curx) unchanged. 119 */ 120 int 121 wins_wstr(WINDOW *win, const wchar_t *wstr) 122 { 123 return wins_nwstr(win, wstr, -1); 124 } 125 126 /* 127 * wins_nwstr -- 128 * Do an insert-n-string on the line, leaving (cury, curx) unchanged. 129 */ 130 int 131 wins_nwstr(WINDOW *win, const wchar_t *wstr, int n) 132 { 133 __LDATA *start, *temp1, *temp2; 134 __LINE *lnp; 135 const wchar_t *scp; 136 cchar_t cc; 137 wchar_t *lstr, *slstr; 138 int width, len, lx, sx, x, y, tx, ty, cw, pcw, newx, tn, w; 139 wchar_t ws[] = L" "; 140 141 if (__predict_false(win == NULL)) 142 return ERR; 143 144 /* check for leading non-spacing character */ 145 if (!wstr) 146 return OK; 147 cw = wcwidth(*wstr); 148 if (cw < 0) 149 cw = 1; 150 if (!cw) 151 return ERR; 152 153 lstr = malloc(sizeof(wchar_t) * win->maxx); 154 if (lstr == NULL) 155 return ERR; 156 157 scp = wstr + 1; 158 width = cw; 159 len = 1; 160 n--; 161 y = win->cury; 162 x = win->curx; 163 tn = n; 164 165 /* 166 * Firstly, make sure the string will fit... 167 */ 168 while (*scp) { 169 if (!tn) 170 break; 171 switch (*scp) { 172 case L'\b': 173 if (--x < 0) 174 x = 0; 175 cw = wcwidth(*(scp - 1)); 176 if (cw < 0) 177 cw = 1; 178 width -= cw; 179 scp++; 180 continue; 181 182 case L'\r': 183 width = 0; 184 x = 0; 185 scp++; 186 continue; 187 188 case L'\n': 189 if (y == win->scr_b) { 190 if (!(win->flags & __SCROLLOK)) { 191 free(lstr); 192 return ERR; 193 } 194 } 195 y++; 196 scp++; 197 continue; 198 199 case L'\t': 200 cw = wcwidth(ws[0]); 201 if (cw < 0) 202 cw = 1; 203 w = cw * (TABSIZE - (x % TABSIZE)); 204 width += w; 205 x += w; 206 scp++; 207 continue; 208 } 209 w = wcwidth(*scp); 210 if (w < 0) 211 w = 1; 212 tn--, width += w; 213 scp++; 214 } 215 __CTRACE(__CTRACE_INPUT, "wins_nwstr: width=%d,len=%d\n", width, len); 216 217 if (width > win->maxx - win->curx + 1) { 218 free(lstr); 219 return ERR; 220 } 221 222 scp = wstr; 223 x = win->curx; 224 y = win->cury; 225 len = 0; 226 width = 0; 227 slstr = lstr; 228 229 while (*scp && n) { 230 lstr = slstr; 231 lx = x; 232 while (*scp) { 233 if (!n) 234 break; 235 switch (*scp) { 236 case L'\b': 237 if (--x < 0) 238 x = 0; 239 if (--len < 0) 240 len = 0; 241 cw = wcwidth(*(scp - 1)); 242 if (cw < 0) 243 cw = 1; 244 width -= cw; 245 scp++; 246 if (lstr != slstr) 247 lstr--; 248 continue; 249 250 case L'\r': 251 width = 0; 252 len = 0; 253 x = 0; 254 scp++; 255 lstr = slstr; 256 continue; 257 258 case L'\n': 259 goto loopdone; 260 261 case L'\t': 262 cw = wcwidth(ws[0]); 263 if (cw < 0) 264 cw = 1; 265 w = cw * (TABSIZE - (x % TABSIZE)); 266 width += w; 267 x += w; 268 len += w; 269 scp++; 270 *lstr = *ws; 271 lstr++; 272 continue; 273 } 274 w = wcwidth(*scp); 275 if (w < 0) 276 w = 1; 277 *lstr = *scp; 278 n--, len++, width += w; 279 scp++, lstr++; 280 } 281 282 loopdone: 283 start = &win->alines[y]->line[x]; 284 sx = x; 285 lnp = win->alines[y]; 286 pcw = start->wcols; 287 if (pcw < 0) { 288 sx += pcw; 289 start += pcw; 290 } 291 __CTRACE(__CTRACE_INPUT, "wins_nwstr: start@(%d)\n", sx); 292 pcw = start->wcols; 293 lnp->flags |= __ISDIRTY; 294 newx = sx + win->ch_off; 295 if (newx < *lnp->firstchp) 296 *lnp->firstchp = newx; 297 298 #ifdef DEBUG 299 { 300 int i; 301 302 __CTRACE(__CTRACE_INPUT, "========before=======\n"); 303 for (i = 0; i < win->maxx; i++) 304 __CTRACE(__CTRACE_INPUT, 305 "wins_nwstr: (%d,%d)=(%x,%x,%d,%x,%p)\n", 306 y, i, win->alines[y]->line[i].ch, 307 win->alines[y]->line[i].attr, 308 win->alines[y]->line[i].wcols, 309 win->alines[y]->line[i].cflags, 310 win->alines[y]->line[i].nsp); 311 } 312 #endif /* DEBUG */ 313 314 /* shift all complete characters */ 315 if (sx + width + pcw <= win->maxx) { 316 __CTRACE(__CTRACE_INPUT, "wins_nwstr: shift all characters by %d\n", width); 317 temp1 = &win->alines[y]->line[win->maxx - 1]; 318 temp2 = temp1 - width; 319 pcw = (temp2 + 1)->wcols; 320 if (pcw < 0) { 321 __CTRACE(__CTRACE_INPUT, 322 "wins_nwstr: clear from %d to EOL(%d)\n", 323 win->maxx + pcw, win->maxx - 1); 324 temp2 += pcw; 325 while (temp1 > temp2 + width) { 326 temp1->ch = win->bch; 327 if (_cursesi_copy_nsp(win->bnsp, temp1) == ERR) { 328 free(lstr); 329 return ERR; 330 } 331 temp1->attr = win->battr; 332 temp1->cflags |= CA_BACKGROUND; 333 temp1->cflags &= ~CA_CONTINUATION; 334 temp1->wcols = 1; 335 __CTRACE(__CTRACE_INPUT, 336 "wins_nwstr: empty cell(%p)\n", temp1); 337 temp1--; 338 } 339 } 340 while (temp2 >= start) { 341 (void)memcpy(temp1, temp2, sizeof(__LDATA)); 342 temp1--, temp2--; 343 } 344 #ifdef DEBUG 345 { 346 int i; 347 348 __CTRACE(__CTRACE_INPUT, "=====after shift====\n"); 349 for (i = 0; i < win->maxx; i++) 350 __CTRACE(__CTRACE_INPUT, 351 "wins_nwstr: (%d,%d)=(%x,%x,%x,%p)\n", 352 y, i, 353 win->alines[y]->line[i].ch, 354 win->alines[y]->line[i].attr, 355 win->alines[y]->line[i].cflags, 356 win->alines[y]->line[i].nsp); 357 __CTRACE(__CTRACE_INPUT, "=====lstr====\n"); 358 for (i = 0; i < len; i++) 359 __CTRACE(__CTRACE_INPUT, 360 "wins_nwstr: lstr[%d]= %x,\n", 361 i, (unsigned) slstr[i]); 362 } 363 #endif /* DEBUG */ 364 } 365 366 /* update string columns */ 367 x = lx; 368 for (lstr = slstr, temp1 = start; len; len--, lstr++) { 369 lnp = win->alines[y]; 370 cc.vals[0] = *lstr; 371 cc.elements = 1; 372 cc.attributes = win->wattr; 373 _cursesi_addwchar(win, &lnp, &y, &x, &cc, 0); 374 } 375 376 #ifdef DEBUG 377 { 378 int i; 379 380 __CTRACE(__CTRACE_INPUT, "lx = %d, x = %x\n", lx, x); 381 __CTRACE(__CTRACE_INPUT, "========after=======\n"); 382 for (i = 0; i < win->maxx; i++) 383 __CTRACE(__CTRACE_INPUT, 384 "wins_nwstr: (%d,%d)=(%x,%x,%d,%x,%p)\n", 385 y, i, 386 win->alines[y]->line[i].ch, 387 win->alines[y]->line[i].attr, 388 win->alines[y]->line[i].wcols, 389 win->alines[y]->line[i].cflags, 390 win->alines[y]->line[i].nsp); 391 } 392 #endif /* DEBUG */ 393 394 __touchline(win, (int) y, lx, (int) win->maxx - 1); 395 396 /* 397 * Handle the newline here - we don't need to check 398 * if we are allowed to scroll because this was checked 399 * already. 400 */ 401 if (*scp == '\n') { 402 tx = win->curx; 403 ty = win->cury; 404 win->curx = x; 405 win->cury = y; 406 wclrtoeol(win); 407 win->curx = tx; 408 win->cury = ty; 409 if (y == win->scr_b) 410 scroll(win); 411 else 412 y++; 413 scp++; 414 415 } 416 417 newx = win->maxx - 1 + win->ch_off; 418 if (newx > *lnp->lastchp) 419 *lnp->lastchp = newx; 420 } 421 free(lstr); 422 __sync(win); 423 return OK; 424 } 425