1 /* $NetBSD: ins_wstr.c,v 1.20 2021/11/16 23:23:02 kre 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 1.20 2021/11/16 23:23:02 kre 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 /* check for leading non-spacing character */ 142 if (!wstr) 143 return OK; 144 cw = wcwidth(*wstr); 145 if (cw < 0) 146 cw = 1; 147 if (!cw) 148 return ERR; 149 150 lstr = malloc(sizeof(wchar_t) * win->maxx); 151 if (lstr == NULL) 152 return ERR; 153 154 scp = wstr + 1; 155 width = cw; 156 len = 1; 157 n--; 158 y = win->cury; 159 x = win->curx; 160 tn = n; 161 162 /* 163 * Firstly, make sure the string will fit... 164 */ 165 while (*scp) { 166 if (!tn) 167 break; 168 switch (*scp) { 169 case L'\b': 170 if (--x < 0) 171 x = 0; 172 cw = wcwidth(*(scp - 1)); 173 if (cw < 0) 174 cw = 1; 175 width -= cw; 176 scp++; 177 continue;; 178 179 case L'\r': 180 width = 0; 181 x = 0; 182 scp++; 183 continue; 184 185 case L'\n': 186 if (y == win->scr_b) { 187 if (!(win->flags & __SCROLLOK)) { 188 free(lstr); 189 return ERR; 190 } 191 } 192 y++; 193 scp++; 194 continue; 195 196 case L'\t': 197 cw = wcwidth(ws[0]); 198 if (cw < 0) 199 cw = 1; 200 w = cw * (TABSIZE - (x % TABSIZE)); 201 width += w; 202 x += w; 203 scp++; 204 continue; 205 } 206 w = wcwidth(*scp); 207 if (w < 0) 208 w = 1; 209 tn--, width += w; 210 scp++; 211 } 212 __CTRACE(__CTRACE_INPUT, "wins_nwstr: width=%d,len=%d\n", width, len); 213 214 if (width > win->maxx - win->curx + 1) { 215 free(lstr); 216 return ERR; 217 } 218 219 scp = wstr; 220 x = win->curx; 221 y = win->cury; 222 len = 0; 223 width = 0; 224 slstr = lstr; 225 226 while (*scp && n) { 227 lstr = slstr; 228 lx = x; 229 while (*scp) { 230 if (!n) 231 break; 232 switch (*scp) { 233 case L'\b': 234 if (--x < 0) 235 x = 0; 236 if (--len < 0) 237 len = 0; 238 cw = wcwidth(*(scp - 1)); 239 if (cw < 0) 240 cw = 1; 241 width -= cw; 242 scp++; 243 if (lstr != slstr) 244 lstr--; 245 continue;; 246 247 case L'\r': 248 width = 0; 249 len = 0; 250 x = 0; 251 scp++; 252 lstr = slstr; 253 continue; 254 255 case L'\n': 256 goto loopdone; 257 break; 258 259 case L'\t': 260 cw = wcwidth(ws[0]); 261 if (cw < 0) 262 cw = 1; 263 w = cw * (TABSIZE - (x % TABSIZE)); 264 width += w; 265 x += w; 266 len += w; 267 scp++; 268 *lstr = *ws; 269 lstr++; 270 continue; 271 } 272 w = wcwidth(*scp); 273 if (w < 0) 274 w = 1; 275 *lstr = *scp; 276 n--, len++, width += w; 277 scp++, lstr++; 278 } 279 280 loopdone: 281 start = &win->alines[y]->line[x]; 282 sx = x; 283 lnp = win->alines[y]; 284 pcw = WCOL(*start); 285 if (pcw < 0) { 286 sx += pcw; 287 start += pcw; 288 } 289 __CTRACE(__CTRACE_INPUT, "wins_nwstr: start@(%d)\n", sx); 290 pcw = WCOL(*start); 291 lnp->flags |= __ISDIRTY; 292 newx = sx + win->ch_off; 293 if (newx < *lnp->firstchp) 294 *lnp->firstchp = newx; 295 #ifdef DEBUG 296 { 297 int i; 298 299 __CTRACE(__CTRACE_INPUT, "========before=======\n"); 300 for (i = 0; i < win->maxx; i++) 301 __CTRACE(__CTRACE_INPUT, 302 "wins_nwstr: (%d,%d)=(%x,%x,%p)\n", 303 y, i, win->alines[y]->line[i].ch, 304 win->alines[y]->line[i].attr, 305 win->alines[y]->line[i].nsp); 306 } 307 #endif /* DEBUG */ 308 309 /* shift all complete characters */ 310 if (sx + width + pcw <= win->maxx) { 311 __CTRACE(__CTRACE_INPUT, "wins_nwstr: shift all characters by %d\n", width); 312 temp1 = &win->alines[y]->line[win->maxx - 1]; 313 temp2 = temp1 - width; 314 pcw = WCOL(*(temp2 + 1)); 315 if (pcw < 0) { 316 __CTRACE(__CTRACE_INPUT, 317 "wins_nwstr: clear from %d to EOL(%d)\n", 318 win->maxx + pcw, win->maxx - 1); 319 temp2 += pcw; 320 while (temp1 > temp2 + width) { 321 temp1->ch = (wchar_t)btowc((int) win->bch); 322 if (_cursesi_copy_nsp(win->bnsp, temp1) == ERR) { 323 free(lstr); 324 return ERR; 325 } 326 temp1->attr = win->battr; 327 SET_WCOL(*temp1, 1); 328 __CTRACE(__CTRACE_INPUT, 329 "wins_nwstr: empty cell(%p)\n", temp1); 330 temp1--; 331 } 332 } 333 while (temp2 >= start) { 334 (void)memcpy(temp1, temp2, sizeof(__LDATA)); 335 temp1--, temp2--; 336 } 337 #ifdef DEBUG 338 { 339 int i; 340 341 __CTRACE(__CTRACE_INPUT, "=====after shift====\n"); 342 for (i = 0; i < win->maxx; i++) 343 __CTRACE(__CTRACE_INPUT, 344 "wins_nwstr: (%d,%d)=(%x,%x,%p)\n", 345 y, i, 346 win->alines[y]->line[i].ch, 347 win->alines[y]->line[i].attr, 348 win->alines[y]->line[i].nsp); 349 __CTRACE(__CTRACE_INPUT, "=====lstr====\n"); 350 for (i = 0; i < len; i++) 351 __CTRACE(__CTRACE_INPUT, 352 "wins_nwstr: lstr[%d]= %x,\n", 353 i, (unsigned) slstr[i]); 354 } 355 #endif /* DEBUG */ 356 } 357 358 /* update string columns */ 359 x = lx; 360 for (lstr = slstr, temp1 = start; len; len--, lstr++) { 361 lnp = win->alines[y]; 362 cc.vals[0] = *lstr; 363 cc.elements = 1; 364 cc.attributes = win->wattr; 365 _cursesi_addwchar(win, &lnp, &y, &x, &cc, 0); 366 } 367 368 #ifdef DEBUG 369 { 370 int i; 371 372 __CTRACE(__CTRACE_INPUT, "lx = %d, x = %x\n", lx, x); 373 __CTRACE(__CTRACE_INPUT, "========after=======\n"); 374 for (i = 0; i < win->maxx; i++) 375 __CTRACE(__CTRACE_INPUT, 376 "wins_nwstr: (%d,%d)=(%x,%x,%p)\n", 377 y, i, 378 win->alines[y]->line[i].ch, 379 win->alines[y]->line[i].attr, 380 win->alines[y]->line[i].nsp); 381 } 382 #endif /* DEBUG */ 383 384 __touchline(win, (int) y, lx, (int) win->maxx - 1); 385 386 /* 387 * Handle the newline here - we don't need to check 388 * if we are allowed to scroll because this was checked 389 * already. 390 */ 391 if (*scp == '\n') { 392 tx = win->curx; 393 ty = win->cury; 394 win->curx = x; 395 win->cury = y; 396 wclrtoeol(win); 397 win->curx = tx; 398 win->cury = ty; 399 if (y == win->scr_b) 400 scroll(win); 401 else 402 y++; 403 scp++; 404 405 } 406 407 newx = win->maxx - 1 + win->ch_off; 408 if (newx > *lnp->lastchp) 409 *lnp->lastchp = newx; 410 } 411 free(lstr); 412 __sync(win); 413 return OK; 414 } 415