1 /* $NetBSD: newwin.c,v 1.68 2024/12/23 02:58:04 blymn Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94"; 36 #else 37 __RCSID("$NetBSD: newwin.c,v 1.68 2024/12/23 02:58:04 blymn Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 43 #include "curses.h" 44 #include "curses_private.h" 45 46 47 static WINDOW *__makenew(SCREEN *screen, int nlines, int ncols, int by, 48 int bx, int sub, int ispad); 49 static WINDOW *__subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, 50 int ispad); 51 52 /* 53 * derwin -- 54 * Create a new window in the same manner as subwin but (by, bx) 55 * are relative to the origin of window orig instead of absolute. 56 */ 57 WINDOW * 58 derwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 59 { 60 61 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx, 62 FALSE); 63 } 64 65 /* 66 * subpad -- 67 * Create a new pad in the same manner as subwin but (by, bx) 68 * are relative to the origin of window orig instead of absolute. 69 */ 70 WINDOW * 71 subpad(WINDOW *orig, int nlines, int ncols, int by, int bx) 72 { 73 74 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx, 75 TRUE); 76 } 77 78 /* 79 * dupwin -- 80 * Create a copy of the given window. 81 */ 82 WINDOW * 83 dupwin(WINDOW *win) 84 { 85 WINDOW *new_one; 86 87 if (__predict_false(win == NULL)) 88 return NULL; 89 90 if ((new_one = __newwin(_cursesi_screen, win->maxy, win->maxx, 91 win->begy, win->begx, FALSE, 92 win == stdscr ? TRUE : FALSE)) == NULL) 93 return NULL; 94 95 overwrite(win, new_one); 96 return new_one; 97 } 98 99 /* 100 * newwin -- 101 * Allocate space for and set up defaults for a new window. 102 */ 103 WINDOW * 104 newwin(int nlines, int ncols, int by, int bx) 105 { 106 107 return __newwin(_cursesi_screen, nlines, ncols, by, bx, FALSE, FALSE); 108 } 109 110 /* 111 * newpad -- 112 * Allocate space for and set up defaults for a new pad. 113 */ 114 WINDOW * 115 newpad(int nlines, int ncols) 116 { 117 118 if (nlines < 1 || ncols < 1) 119 return NULL; 120 return __newwin(_cursesi_screen, nlines, ncols, 0, 0, TRUE, FALSE); 121 } 122 123 WINDOW * 124 __newwin(SCREEN *screen, int nlines, int ncols, int by, int bx, int ispad, 125 int isstdscr) 126 { 127 WINDOW *win; 128 __LINE *lp; 129 int i, j; 130 int ry, maxy, maxx; 131 __LDATA *sp; 132 133 if (by < 0 || bx < 0) 134 return NULL; 135 136 if (isstdscr) { 137 ry = __rippedlines(screen, -1); 138 by += __rippedlines(screen, 1); 139 } else 140 ry = 0; 141 142 maxy = nlines > 0 ? nlines : LINES - by - ry + nlines; 143 maxx = ncols > 0 ? ncols : COLS - bx + ncols; 144 145 if ((win = __makenew(screen, maxy, maxx, by, bx, 0, ispad)) == NULL) 146 return NULL; 147 148 #ifdef HAVE_WCHAR 149 win->bch = (wchar_t) btowc((int) ' '); 150 #else 151 win->bch = ' '; 152 #endif 153 154 if (__using_color) 155 win->battr |= __default_color; 156 win->nextp = win; 157 win->ch_off = 0; 158 win->orig = NULL; 159 win->reqy = nlines; 160 win->reqx = ncols; 161 162 __CTRACE(__CTRACE_WINDOW, "newwin: win->ch_off = %d\n", win->ch_off); 163 164 for (i = 0; i < maxy; i++) { 165 lp = win->alines[i]; 166 if (ispad) 167 lp->flags = __ISDIRTY; 168 else 169 lp->flags = 0; 170 for (sp = lp->line, j = 0; j < maxx; j++, sp++) { 171 sp->attr = 0; 172 sp->cflags = CA_BACKGROUND; 173 sp->ch = win->bch; 174 #ifdef HAVE_WCHAR 175 sp->nsp = NULL; 176 sp->wcols = 1; 177 #endif /* HAVE_WCHAR */ 178 } 179 lp->hash = __hash_line(lp->line, maxx); 180 } 181 return (win); 182 } 183 184 WINDOW * 185 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 186 { 187 188 return __subwin(orig, nlines, ncols, by, bx, FALSE); 189 } 190 191 static WINDOW * 192 __subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, int ispad) 193 { 194 int i; 195 __LINE *lp; 196 WINDOW *win; 197 int maxy, maxx; 198 199 __CTRACE(__CTRACE_WINDOW, "subwin: (%p, %d, %d, %d, %d, %d)\n", 200 orig, nlines, ncols, by, bx, ispad); 201 202 if (__predict_false(orig == NULL)) 203 return NULL; 204 205 /* Make sure window fits inside the original one. */ 206 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines; 207 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols; 208 if (by < orig->begy || bx < orig->begx 209 || by + maxy > orig->maxy + orig->begy 210 || bx + maxx > orig->maxx + orig->begx) 211 return NULL; 212 if ((win = __makenew(_cursesi_screen, maxy, maxx, 213 by, bx, 1, ispad)) == NULL) 214 return NULL; 215 win->bch = orig->bch; 216 win->battr = orig->battr; 217 win->reqy = nlines; 218 win->reqx = ncols; 219 win->nextp = orig->nextp; 220 orig->nextp = win; 221 win->orig = orig; 222 223 /* Initialize flags here so that refresh can also use __set_subwin. */ 224 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 225 lp->flags = 0; 226 __set_subwin(orig, win); 227 return win; 228 } 229 /* 230 * This code is shared with mvwin(). 231 */ 232 void 233 __set_subwin(WINDOW *orig, WINDOW *win) 234 { 235 int i; 236 __LINE *lp, *olp; 237 238 win->ch_off = win->begx - orig->begx; 239 /* Point line pointers to line space. */ 240 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 241 win->alines[i] = lp; 242 olp = orig->alines[i + win->begy - orig->begy]; 243 #ifdef DEBUG 244 lp->sentinel = SENTINEL_VALUE; 245 #endif 246 lp->line = &olp->line[win->ch_off]; 247 lp->firstchp = &olp->firstch; 248 lp->lastchp = &olp->lastch; 249 lp->hash = __hash_line(lp->line, win->maxx); 250 } 251 252 __CTRACE(__CTRACE_WINDOW, "__set_subwin: win->ch_off = %d\n", 253 win->ch_off); 254 } 255 /* 256 * __makenew -- 257 * Set up a window buffer and returns a pointer to it. 258 */ 259 static WINDOW * 260 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 261 int ispad) 262 { 263 WINDOW *win; 264 __LINE *lp; 265 struct __winlist *wlp, *wlp2; 266 int i; 267 268 269 __CTRACE(__CTRACE_WINDOW, "makenew: (%d, %d, %d, %d)\n", 270 nlines, ncols, by, bx); 271 if (nlines <= 0 || ncols <= 0) 272 return NULL; 273 274 if ((win = malloc(sizeof(WINDOW))) == NULL) 275 return NULL; 276 __CTRACE(__CTRACE_WINDOW, "makenew: win = %p\n", win); 277 win->fp = NULL; 278 win->buf = NULL; 279 win->buflen = 0; 280 281 /* Set up line pointer array and line space. */ 282 if ((win->alines = malloc(nlines * sizeof(__LINE *))) == NULL) { 283 free(win); 284 return NULL; 285 } 286 if ((win->lspace = calloc(nlines, sizeof(__LINE))) == NULL) { 287 free(win->alines); 288 free(win); 289 return NULL; 290 } 291 /* Don't allocate window and line space if it's a subwindow */ 292 if (sub) 293 win->wspace = NULL; 294 else { 295 /* 296 * Allocate window space in one chunk. 297 */ 298 if ((win->wspace = 299 calloc(ncols * nlines, sizeof(__LDATA))) == NULL) { 300 free(win->lspace); 301 free(win->alines); 302 free(win); 303 return NULL; 304 } 305 /* 306 * Append window to window list. 307 */ 308 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 309 free(win->wspace); 310 free(win->lspace); 311 free(win->alines); 312 free(win); 313 return NULL; 314 } 315 wlp->winp = win; 316 wlp->nextp = NULL; 317 if (screen->winlistp == NULL) 318 screen->winlistp = wlp; 319 else { 320 wlp2 = screen->winlistp; 321 while (wlp2->nextp != NULL) 322 wlp2 = wlp2->nextp; 323 wlp2->nextp = wlp; 324 } 325 /* 326 * Point line pointers to line space, and lines themselves into 327 * window space. 328 */ 329 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 330 win->alines[i] = lp; 331 lp->line = &win->wspace[i * ncols]; 332 #ifdef DEBUG 333 lp->sentinel = SENTINEL_VALUE; 334 #endif 335 lp->firstchp = &lp->firstch; 336 lp->lastchp = &lp->lastch; 337 if (ispad) { 338 lp->firstch = 0; 339 lp->lastch = ncols; 340 } else { 341 lp->firstch = ncols; 342 lp->lastch = 0; 343 } 344 } 345 } 346 __CTRACE(__CTRACE_WINDOW, "makenew: ncols = %d\n", ncols); 347 win->screen = screen; 348 win->cury = win->curx = 0; 349 win->maxy = nlines; 350 win->maxx = ncols; 351 win->reqy = nlines; 352 win->reqx = ncols; 353 354 win->begy = by; 355 win->begx = bx; 356 win->flags = (__IDLINE | __IDCHAR); 357 win->delay = -1; 358 win->wattr = 0; 359 win->battr = 0; 360 #ifdef HAVE_WCHAR 361 win->bnsp = NULL; 362 win->wcols = 1; 363 #endif /* HAVE_WCHAR */ 364 win->scr_t = 0; 365 win->scr_b = win->maxy - 1; 366 if (ispad) { 367 win->flags |= __ISPAD; 368 win->pbegy = 0; 369 win->pbegx = 0; 370 win->sbegy = 0; 371 win->sbegx = 0; 372 win->smaxy = 0; 373 win->smaxx = 0; 374 } else 375 __swflags(win); 376 __CTRACE(__CTRACE_WINDOW, "makenew: sub = %d\n", sub); 377 __CTRACE(__CTRACE_WINDOW, "makenew: ispad = %d\n", ispad); 378 __CTRACE(__CTRACE_WINDOW, "makenew: win->wattr = %08x\n", win->wattr); 379 __CTRACE(__CTRACE_WINDOW, "makenew: win->flags = %#.4x\n", win->flags); 380 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxy = %d\n", win->maxy); 381 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxx = %d\n", win->maxx); 382 __CTRACE(__CTRACE_WINDOW, "makenew: win->begy = %d\n", win->begy); 383 __CTRACE(__CTRACE_WINDOW, "makenew: win->begx = %d\n", win->begx); 384 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_t = %d\n", win->scr_t); 385 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_b = %d\n", win->scr_b); 386 return win; 387 } 388 389 void 390 __swflags(WINDOW *win) 391 { 392 TERMINAL *term = win->screen->term; 393 394 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 395 if (win->begx + win->maxx == win->screen->COLS && 396 !(win->flags & __ISPAD)) 397 { 398 win->flags |= __ENDLINE; 399 if (win->begx == 0 && 400 win->maxy == win->screen->LINES && 401 win->begy == 0) 402 win->flags |= __FULLWIN; 403 if (win->begy + win->maxy == win->screen->LINES && 404 t_auto_right_margin(term) && 405 !(t_insert_character(term) != NULL || 406 t_parm_ich(term) != NULL || 407 (t_enter_insert_mode(term) != NULL && 408 t_exit_insert_mode(term) != NULL))) 409 win->flags |= __SCROLLWIN; 410 } 411 } 412 413 /* 414 * is_pad -- 415 * Return true if window was created by newpad. 416 */ 417 bool 418 is_pad(const WINDOW *win) 419 { 420 421 if (__predict_false(win == NULL)) 422 return false; 423 424 return win->flags & __ISPAD ? true : false; 425 } 426
Indexes created Sun Sep 21 20:09:37 GMT 2025