1/* $NetBSD: newwin.c,v 1.67 2022/05/03 07:25:34 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 35static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94"; 36#else 37__RCSID("$NetBSD: newwin.c,v 1.67 2022/05/03 07:25:34 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 47static WINDOW *__makenew(SCREEN *screen, int nlines, int ncols, int by, 48 int bx, int sub, int ispad); 49static 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 */ 57WINDOW * 58derwin(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 */ 70WINDOW * 71subpad(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 */ 82WINDOW * 83dupwin(WINDOW *win) 84{ 85 WINDOW *new_one; 86 87 if ((new_one = __newwin(_cursesi_screen, win->maxy, win->maxx, 88 win->begy, win->begx, FALSE, 89 win == stdscr ? TRUE : FALSE)) == NULL) 90 return NULL; 91 92 overwrite(win, new_one); 93 return new_one; 94} 95 96/* 97 * newwin -- 98 * Allocate space for and set up defaults for a new window. 99 */ 100WINDOW * 101newwin(int nlines, int ncols, int by, int bx) 102{ 103 104 return __newwin(_cursesi_screen, nlines, ncols, by, bx, FALSE, FALSE); 105} 106 107/* 108 * newpad -- 109 * Allocate space for and set up defaults for a new pad. 110 */ 111WINDOW * 112newpad(int nlines, int ncols) 113{ 114 115 if (nlines < 1 || ncols < 1) 116 return NULL; 117 return __newwin(_cursesi_screen, nlines, ncols, 0, 0, TRUE, FALSE); 118} 119 120WINDOW * 121__newwin(SCREEN *screen, int nlines, int ncols, int by, int bx, int ispad, 122 int isstdscr) 123{ 124 WINDOW *win; 125 __LINE *lp; 126 int i, j; 127 int ry, maxy, maxx; 128 __LDATA *sp; 129 130 if (by < 0 || bx < 0) 131 return NULL; 132 133 if (isstdscr) { 134 ry = __rippedlines(screen, -1); 135 by += __rippedlines(screen, 1); 136 } else 137 ry = 0; 138 139 maxy = nlines > 0 ? nlines : LINES - by - ry + nlines; 140 maxx = ncols > 0 ? ncols : COLS - bx + ncols; 141 142 if ((win = __makenew(screen, maxy, maxx, by, bx, 0, ispad)) == NULL) 143 return NULL; 144 145#ifdef HAVE_WCHAR 146 win->bch = (wchar_t) btowc((int) ' '); 147#else 148 win->bch = ' '; 149#endif 150 151 if (__using_color) 152 win->battr |= __default_color; 153 win->nextp = win; 154 win->ch_off = 0; 155 win->orig = NULL; 156 win->reqy = nlines; 157 win->reqx = ncols; 158 159 __CTRACE(__CTRACE_WINDOW, "newwin: win->ch_off = %d\n", win->ch_off); 160 161 for (i = 0; i < maxy; i++) { 162 lp = win->alines[i]; 163 if (ispad) 164 lp->flags = __ISDIRTY; 165 else 166 lp->flags = 0; 167 for (sp = lp->line, j = 0; j < maxx; j++, sp++) { 168 sp->attr = 0; 169 sp->cflags = CA_BACKGROUND; 170 sp->ch = win->bch; 171#ifdef HAVE_WCHAR 172 sp->nsp = NULL; 173 sp->wcols = 1; 174#endif /* HAVE_WCHAR */ 175 } 176 lp->hash = __hash_line(lp->line, maxx); 177 } 178 return (win); 179} 180 181WINDOW * 182subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 183{ 184 185 return __subwin(orig, nlines, ncols, by, bx, FALSE); 186} 187 188static WINDOW * 189__subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, int ispad) 190{ 191 int i; 192 __LINE *lp; 193 WINDOW *win; 194 int maxy, maxx; 195 196 __CTRACE(__CTRACE_WINDOW, "subwin: (%p, %d, %d, %d, %d, %d)\n", 197 orig, nlines, ncols, by, bx, ispad); 198 if (orig == NULL) 199 return NULL; 200 201 /* Make sure window fits inside the original one. */ 202 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines; 203 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols; 204 if (by < orig->begy || bx < orig->begx 205 || by + maxy > orig->maxy + orig->begy 206 || bx + maxx > orig->maxx + orig->begx) 207 return NULL; 208 if ((win = __makenew(_cursesi_screen, maxy, maxx, 209 by, bx, 1, ispad)) == NULL) 210 return NULL; 211 win->bch = orig->bch; 212 win->battr = orig->battr; 213 win->reqy = nlines; 214 win->reqx = ncols; 215 win->nextp = orig->nextp; 216 orig->nextp = win; 217 win->orig = orig; 218 219 /* Initialize flags here so that refresh can also use __set_subwin. */ 220 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 221 lp->flags = 0; 222 __set_subwin(orig, win); 223 return win; 224} 225/* 226 * This code is shared with mvwin(). 227 */ 228void 229__set_subwin(WINDOW *orig, WINDOW *win) 230{ 231 int i; 232 __LINE *lp, *olp; 233 234 win->ch_off = win->begx - orig->begx; 235 /* Point line pointers to line space. */ 236 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 237 win->alines[i] = lp; 238 olp = orig->alines[i + win->begy - orig->begy]; 239#ifdef DEBUG 240 lp->sentinel = SENTINEL_VALUE; 241#endif 242 lp->line = &olp->line[win->ch_off]; 243 lp->firstchp = &olp->firstch; 244 lp->lastchp = &olp->lastch; 245 lp->hash = __hash_line(lp->line, win->maxx); 246 } 247 248 __CTRACE(__CTRACE_WINDOW, "__set_subwin: win->ch_off = %d\n", 249 win->ch_off); 250} 251/* 252 * __makenew -- 253 * Set up a window buffer and returns a pointer to it. 254 */ 255static WINDOW * 256__makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 257 int ispad) 258{ 259 WINDOW *win; 260 __LINE *lp; 261 struct __winlist *wlp, *wlp2; 262 int i; 263 264 265 __CTRACE(__CTRACE_WINDOW, "makenew: (%d, %d, %d, %d)\n", 266 nlines, ncols, by, bx); 267 if (nlines <= 0 || ncols <= 0) 268 return NULL; 269 270 if ((win = malloc(sizeof(WINDOW))) == NULL) 271 return NULL; 272 __CTRACE(__CTRACE_WINDOW, "makenew: win = %p\n", win); 273 win->fp = NULL; 274 win->buf = NULL; 275 win->buflen = 0; 276 277 /* Set up line pointer array and line space. */ 278 if ((win->alines = malloc(nlines * sizeof(__LINE *))) == NULL) { 279 free(win); 280 return NULL; 281 } 282 if ((win->lspace = calloc(nlines, sizeof(__LINE))) == NULL) { 283 free(win->alines); 284 free(win); 285 return NULL; 286 } 287 /* Don't allocate window and line space if it's a subwindow */ 288 if (sub) 289 win->wspace = NULL; 290 else { 291 /* 292 * Allocate window space in one chunk. 293 */ 294 if ((win->wspace = 295 calloc(ncols * nlines, sizeof(__LDATA))) == NULL) { 296 free(win->lspace); 297 free(win->alines); 298 free(win); 299 return NULL; 300 } 301 /* 302 * Append window to window list. 303 */ 304 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 305 free(win->wspace); 306 free(win->lspace); 307 free(win->alines); 308 free(win); 309 return NULL; 310 } 311 wlp->winp = win; 312 wlp->nextp = NULL; 313 if (screen->winlistp == NULL) 314 screen->winlistp = wlp; 315 else { 316 wlp2 = screen->winlistp; 317 while (wlp2->nextp != NULL) 318 wlp2 = wlp2->nextp; 319 wlp2->nextp = wlp; 320 } 321 /* 322 * Point line pointers to line space, and lines themselves into 323 * window space. 324 */ 325 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 326 win->alines[i] = lp; 327 lp->line = &win->wspace[i * ncols]; 328#ifdef DEBUG 329 lp->sentinel = SENTINEL_VALUE; 330#endif 331 lp->firstchp = &lp->firstch; 332 lp->lastchp = &lp->lastch; 333 if (ispad) { 334 lp->firstch = 0; 335 lp->lastch = ncols; 336 } else { 337 lp->firstch = ncols; 338 lp->lastch = 0; 339 } 340 } 341 } 342 __CTRACE(__CTRACE_WINDOW, "makenew: ncols = %d\n", ncols); 343 win->screen = screen; 344 win->cury = win->curx = 0; 345 win->maxy = nlines; 346 win->maxx = ncols; 347 win->reqy = nlines; 348 win->reqx = ncols; 349 350 win->begy = by; 351 win->begx = bx; 352 win->flags = (__IDLINE | __IDCHAR); 353 win->delay = -1; 354 win->wattr = 0; 355 win->battr = 0; 356#ifdef HAVE_WCHAR 357 win->bnsp = NULL; 358 win->wcols = 1; 359#endif /* HAVE_WCHAR */ 360 win->scr_t = 0; 361 win->scr_b = win->maxy - 1; 362 if (ispad) { 363 win->flags |= __ISPAD; 364 win->pbegy = 0; 365 win->pbegx = 0; 366 win->sbegy = 0; 367 win->sbegx = 0; 368 win->smaxy = 0; 369 win->smaxx = 0; 370 } else 371 __swflags(win); 372 __CTRACE(__CTRACE_WINDOW, "makenew: sub = %d\n", sub); 373 __CTRACE(__CTRACE_WINDOW, "makenew: ispad = %d\n", ispad); 374 __CTRACE(__CTRACE_WINDOW, "makenew: win->wattr = %08x\n", win->wattr); 375 __CTRACE(__CTRACE_WINDOW, "makenew: win->flags = %#.4x\n", win->flags); 376 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxy = %d\n", win->maxy); 377 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxx = %d\n", win->maxx); 378 __CTRACE(__CTRACE_WINDOW, "makenew: win->begy = %d\n", win->begy); 379 __CTRACE(__CTRACE_WINDOW, "makenew: win->begx = %d\n", win->begx); 380 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_t = %d\n", win->scr_t); 381 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_b = %d\n", win->scr_b); 382 return win; 383} 384 385void 386__swflags(WINDOW *win) 387{ 388 TERMINAL *term = win->screen->term; 389 390 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 391 if (win->begx + win->maxx == win->screen->COLS && 392 !(win->flags & __ISPAD)) 393 { 394 win->flags |= __ENDLINE; 395 if (win->begx == 0 && 396 win->maxy == win->screen->LINES && 397 win->begy == 0) 398 win->flags |= __FULLWIN; 399 if (win->begy + win->maxy == win->screen->LINES && 400 t_auto_right_margin(term) && 401 !(t_insert_character(term) != NULL || 402 t_parm_ich(term) != NULL || 403 (t_enter_insert_mode(term) != NULL && 404 t_exit_insert_mode(term) != NULL))) 405 win->flags |= __SCROLLWIN; 406 } 407} 408 409/* 410 * is_pad -- 411 * Return true if window was created by newpad. 412 */ 413bool 414is_pad(const WINDOW *win) 415{ 416 417 return win->flags & __ISPAD ? true : false; 418} 419