1 /* $NetBSD: newwin.c,v 1.66 2022/04/12 07:03:04 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 1.66 2022/04/12 07:03:04 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 ((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 */ 100 WINDOW * 101 newwin(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 */ 111 WINDOW * 112 newpad(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 } 119 120 WINDOW * 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->ch = win->bch; 170 #ifdef HAVE_WCHAR 171 sp->nsp = NULL; 172 sp->wcols = 1; 173 #endif /* HAVE_WCHAR */ 174 } 175 lp->hash = __hash_line(lp->line, maxx); 176 } 177 return (win); 178 } 179 180 WINDOW * 181 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 182 { 183 184 return __subwin(orig, nlines, ncols, by, bx, FALSE); 185 } 186 187 static WINDOW * 188 __subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, int ispad) 189 { 190 int i; 191 __LINE *lp; 192 WINDOW *win; 193 int maxy, maxx; 194 195 __CTRACE(__CTRACE_WINDOW, "subwin: (%p, %d, %d, %d, %d, %d)\n", 196 orig, nlines, ncols, by, bx, ispad); 197 if (orig == NULL) 198 return NULL; 199 200 /* Make sure window fits inside the original one. */ 201 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines; 202 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols; 203 if (by < orig->begy || bx < orig->begx 204 || by + maxy > orig->maxy + orig->begy 205 || bx + maxx > orig->maxx + orig->begx) 206 return NULL; 207 if ((win = __makenew(_cursesi_screen, maxy, maxx, 208 by, bx, 1, ispad)) == NULL) 209 return NULL; 210 win->bch = orig->bch; 211 win->battr = orig->battr; 212 win->reqy = nlines; 213 win->reqx = ncols; 214 win->nextp = orig->nextp; 215 orig->nextp = win; 216 win->orig = orig; 217 218 /* Initialize flags here so that refresh can also use __set_subwin. */ 219 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 220 lp->flags = 0; 221 __set_subwin(orig, win); 222 return win; 223 } 224 /* 225 * This code is shared with mvwin(). 226 */ 227 void 228 __set_subwin(WINDOW *orig, WINDOW *win) 229 { 230 int i; 231 __LINE *lp, *olp; 232 233 win->ch_off = win->begx - orig->begx; 234 /* Point line pointers to line space. */ 235 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 236 win->alines[i] = lp; 237 olp = orig->alines[i + win->begy - orig->begy]; 238 #ifdef DEBUG 239 lp->sentinel = SENTINEL_VALUE; 240 #endif 241 lp->line = &olp->line[win->ch_off]; 242 lp->firstchp = &olp->firstch; 243 lp->lastchp = &olp->lastch; 244 lp->hash = __hash_line(lp->line, win->maxx); 245 } 246 247 __CTRACE(__CTRACE_WINDOW, "__set_subwin: win->ch_off = %d\n", 248 win->ch_off); 249 } 250 /* 251 * __makenew -- 252 * Set up a window buffer and returns a pointer to it. 253 */ 254 static WINDOW * 255 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 256 int ispad) 257 { 258 WINDOW *win; 259 __LINE *lp; 260 struct __winlist *wlp, *wlp2; 261 int i; 262 263 264 __CTRACE(__CTRACE_WINDOW, "makenew: (%d, %d, %d, %d)\n", 265 nlines, ncols, by, bx); 266 if (nlines <= 0 || ncols <= 0) 267 return NULL; 268 269 if ((win = malloc(sizeof(WINDOW))) == NULL) 270 return NULL; 271 __CTRACE(__CTRACE_WINDOW, "makenew: win = %p\n", win); 272 win->fp = NULL; 273 win->buf = NULL; 274 win->buflen = 0; 275 276 /* Set up line pointer array and line space. */ 277 if ((win->alines = malloc(nlines * sizeof(__LINE *))) == NULL) { 278 free(win); 279 return NULL; 280 } 281 if ((win->lspace = calloc(nlines, sizeof(__LINE))) == NULL) { 282 free(win->alines); 283 free(win); 284 return NULL; 285 } 286 /* Don't allocate window and line space if it's a subwindow */ 287 if (sub) 288 win->wspace = NULL; 289 else { 290 /* 291 * Allocate window space in one chunk. 292 */ 293 if ((win->wspace = 294 calloc(ncols * nlines, sizeof(__LDATA))) == NULL) { 295 free(win->lspace); 296 free(win->alines); 297 free(win); 298 return NULL; 299 } 300 /* 301 * Append window to window list. 302 */ 303 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 304 free(win->wspace); 305 free(win->lspace); 306 free(win->alines); 307 free(win); 308 return NULL; 309 } 310 wlp->winp = win; 311 wlp->nextp = NULL; 312 if (screen->winlistp == NULL) 313 screen->winlistp = wlp; 314 else { 315 wlp2 = screen->winlistp; 316 while (wlp2->nextp != NULL) 317 wlp2 = wlp2->nextp; 318 wlp2->nextp = wlp; 319 } 320 /* 321 * Point line pointers to line space, and lines themselves into 322 * window space. 323 */ 324 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 325 win->alines[i] = lp; 326 lp->line = &win->wspace[i * ncols]; 327 #ifdef DEBUG 328 lp->sentinel = SENTINEL_VALUE; 329 #endif 330 lp->firstchp = &lp->firstch; 331 lp->lastchp = &lp->lastch; 332 if (ispad) { 333 lp->firstch = 0; 334 lp->lastch = ncols; 335 } else { 336 lp->firstch = ncols; 337 lp->lastch = 0; 338 } 339 } 340 } 341 __CTRACE(__CTRACE_WINDOW, "makenew: ncols = %d\n", ncols); 342 win->screen = screen; 343 win->cury = win->curx = 0; 344 win->maxy = nlines; 345 win->maxx = ncols; 346 win->reqy = nlines; 347 win->reqx = ncols; 348 349 win->begy = by; 350 win->begx = bx; 351 win->flags = (__IDLINE | __IDCHAR); 352 win->delay = -1; 353 win->wattr = 0; 354 win->battr = 0; 355 #ifdef HAVE_WCHAR 356 win->bnsp = NULL; 357 win->wcols = 1; 358 #endif /* HAVE_WCHAR */ 359 win->scr_t = 0; 360 win->scr_b = win->maxy - 1; 361 if (ispad) { 362 win->flags |= __ISPAD; 363 win->pbegy = 0; 364 win->pbegx = 0; 365 win->sbegy = 0; 366 win->sbegx = 0; 367 win->smaxy = 0; 368 win->smaxx = 0; 369 } else 370 __swflags(win); 371 __CTRACE(__CTRACE_WINDOW, "makenew: sub = %d\n", sub); 372 __CTRACE(__CTRACE_WINDOW, "makenew: ispad = %d\n", ispad); 373 __CTRACE(__CTRACE_WINDOW, "makenew: win->wattr = %08x\n", win->wattr); 374 __CTRACE(__CTRACE_WINDOW, "makenew: win->flags = %#.4x\n", win->flags); 375 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxy = %d\n", win->maxy); 376 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxx = %d\n", win->maxx); 377 __CTRACE(__CTRACE_WINDOW, "makenew: win->begy = %d\n", win->begy); 378 __CTRACE(__CTRACE_WINDOW, "makenew: win->begx = %d\n", win->begx); 379 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_t = %d\n", win->scr_t); 380 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_b = %d\n", win->scr_b); 381 return win; 382 } 383 384 void 385 __swflags(WINDOW *win) 386 { 387 TERMINAL *term = win->screen->term; 388 389 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 390 if (win->begx + win->maxx == win->screen->COLS && 391 !(win->flags & __ISPAD)) 392 { 393 win->flags |= __ENDLINE; 394 if (win->begx == 0 && 395 win->maxy == win->screen->LINES && 396 win->begy == 0) 397 win->flags |= __FULLWIN; 398 if (win->begy + win->maxy == win->screen->LINES && 399 t_auto_right_margin(term) && 400 !(t_insert_character(term) != NULL || 401 t_parm_ich(term) != NULL || 402 (t_enter_insert_mode(term) != NULL && 403 t_exit_insert_mode(term) != NULL))) 404 win->flags |= __SCROLLWIN; 405 } 406 } 407 408 /* 409 * is_pad -- 410 * Return true if window was created by newpad. 411 */ 412 bool 413 is_pad(const WINDOW *win) 414 { 415 416 return win->flags & __ISPAD ? true : false; 417 } 418