newwin.c revision 1.38
1 /* $NetBSD: newwin.c,v 1.38 2003/07/05 19:03:32 jdc 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94"; 40 #else 41 __RCSID("$NetBSD: newwin.c,v 1.38 2003/07/05 19:03:32 jdc Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <stdlib.h> 46 47 #include "curses.h" 48 #include "curses_private.h" 49 50 extern struct __winlist *winlistp; 51 52 static WINDOW *__makenew(SCREEN *screen, int nlines, int ncols, int by, 53 int bx, int sub, int ispad); 54 static WINDOW *__subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, 55 int ispad); 56 57 /* 58 * derwin -- 59 * Create a new window in the same manner as subwin but (by, bx) 60 * are relative to the origin of window orig instead of absolute. 61 */ 62 WINDOW * 63 derwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 64 { 65 66 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx, 67 FALSE); 68 } 69 70 /* 71 * subpad -- 72 * Create a new pad in the same manner as subwin but (by, bx) 73 * are relative to the origin of window orig instead of absolute. 74 */ 75 WINDOW * 76 subpad(WINDOW *orig, int nlines, int ncols, int by, int bx) 77 { 78 79 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx, 80 TRUE); 81 } 82 83 /* 84 * dupwin -- 85 * Create a copy of the given window. 86 */ 87 WINDOW * 88 dupwin(WINDOW *win) 89 { 90 WINDOW *new_one; 91 92 if ((new_one = __newwin(_cursesi_screen, win->maxy, win->maxx, 93 win->begy, win->begx, FALSE)) == NULL) 94 return NULL; 95 96 overwrite(win, new_one); 97 return new_one; 98 } 99 100 /* 101 * newwin -- 102 * Allocate space for and set up defaults for a new window. 103 */ 104 WINDOW * 105 newwin(int nlines, int ncols, int by, int bx) 106 { 107 return __newwin(_cursesi_screen, nlines, ncols, by, bx, 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 if (nlines < 1 || ncols < 1) 118 return NULL; 119 return __newwin(_cursesi_screen, nlines, ncols, 0, 0, TRUE); 120 } 121 122 WINDOW * 123 __newwin(SCREEN *screen, int nlines, int ncols, int by, int bx, int ispad) 124 { 125 WINDOW *win; 126 __LINE *lp; 127 int i, j; 128 int maxy, maxx; 129 __LDATA *sp; 130 131 if (by < 0 || bx < 0) 132 return (NULL); 133 134 maxy = nlines > 0 ? nlines : LINES - by + nlines; 135 maxx = ncols > 0 ? ncols : COLS - bx + ncols; 136 137 if ((win = __makenew(screen, maxy, maxx, by, bx, 0, ispad)) == NULL) 138 return (NULL); 139 140 win->nextp = win; 141 win->ch_off = 0; 142 win->orig = NULL; 143 win->reqy = nlines; 144 win->reqx = ncols; 145 146 #ifdef DEBUG 147 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 148 #endif 149 150 for (i = 0; i < maxy; i++) { 151 lp = win->lines[i]; 152 if (ispad) 153 lp->flags = __ISDIRTY; 154 else 155 lp->flags = 0; 156 for (sp = lp->line, j = 0; j < maxx; j++, sp++) { 157 sp->ch = ' '; 158 sp->bch = ' '; 159 sp->attr = 0; 160 if (__using_color) 161 sp->battr = __default_color; 162 else 163 sp->battr = 0; 164 } 165 lp->hash = __hash((char *)(void *)lp->line, 166 (size_t) (ncols * __LDATASIZE)); 167 } 168 return (win); 169 } 170 171 WINDOW * 172 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 173 { 174 175 return __subwin(orig, nlines, ncols, by, bx, FALSE); 176 } 177 178 WINDOW * 179 __subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, int ispad) 180 { 181 int i; 182 __LINE *lp; 183 WINDOW *win; 184 int maxy, maxx; 185 186 #ifdef DEBUG 187 __CTRACE("subwin: (%p, %d, %d, %d, %d, %d)\n", orig, nlines, ncols, 188 by, bx, ispad); 189 #endif 190 if (orig == NULL || orig->orig != NULL) 191 return NULL; 192 193 /* Make sure window fits inside the original one. */ 194 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines; 195 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols; 196 if (by < orig->begy || bx < orig->begx 197 || by + maxy > orig->maxy + orig->begy 198 || bx + maxx > orig->maxx + orig->begx) 199 return (NULL); 200 if ((win = __makenew(_cursesi_screen, maxy, maxx, 201 by, bx, 1, ispad)) == NULL) 202 return (NULL); 203 win->reqy = nlines; 204 win->reqx = ncols; 205 win->nextp = orig->nextp; 206 orig->nextp = win; 207 win->orig = orig; 208 209 /* Initialize flags here so that refresh can also use __set_subwin. */ 210 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 211 lp->flags = 0; 212 __set_subwin(orig, win); 213 return (win); 214 } 215 /* 216 * This code is shared with mvwin(). 217 */ 218 void 219 __set_subwin(WINDOW *orig, WINDOW *win) 220 { 221 int i; 222 __LINE *lp, *olp; 223 224 win->ch_off = win->begx - orig->begx; 225 /* Point line pointers to line space. */ 226 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 227 win->lines[i] = lp; 228 olp = orig->lines[i + win->begy - orig->begy]; 229 #ifdef DEBUG 230 lp->sentinel = SENTINEL_VALUE; 231 #endif 232 lp->line = &olp->line[win->ch_off]; 233 lp->firstchp = &olp->firstch; 234 lp->lastchp = &olp->lastch; 235 lp->hash = __hash((char *)(void *)lp->line, 236 (size_t) (win->maxx * __LDATASIZE)); 237 } 238 239 #ifdef DEBUG 240 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 241 #endif 242 } 243 /* 244 * __makenew -- 245 * Set up a window buffer and returns a pointer to it. 246 */ 247 static WINDOW * 248 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 249 int ispad) 250 { 251 WINDOW *win; 252 __LINE *lp; 253 struct __winlist *wlp, *wlp2; 254 int i; 255 256 257 #ifdef DEBUG 258 __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx); 259 #endif 260 if (nlines <= 0 || ncols <= 0) 261 return NULL; 262 263 if ((win = malloc(sizeof(WINDOW))) == NULL) 264 return (NULL); 265 #ifdef DEBUG 266 __CTRACE("makenew: win = %p\n", win); 267 #endif 268 269 /* Set up line pointer array and line space. */ 270 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 271 free(win); 272 return NULL; 273 } 274 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 275 free(win); 276 free(win->lines); 277 return NULL; 278 } 279 /* Don't allocate window and line space if it's a subwindow */ 280 if (!sub) { 281 /* 282 * Allocate window space in one chunk. 283 */ 284 if ((win->wspace = 285 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 286 free(win->lines); 287 free(win->lspace); 288 free(win); 289 return NULL; 290 } 291 /* 292 * Append window to window list. 293 */ 294 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 295 free(win->wspace); 296 free(win->lines); 297 free(win->lspace); 298 free(win); 299 return NULL; 300 } 301 wlp->winp = win; 302 wlp->nextp = NULL; 303 if (screen->winlistp == NULL) 304 screen->winlistp = wlp; 305 else { 306 wlp2 = screen->winlistp; 307 while (wlp2->nextp != NULL) 308 wlp2 = wlp2->nextp; 309 wlp2->nextp = wlp; 310 } 311 /* 312 * Point line pointers to line space, and lines themselves into 313 * window space. 314 */ 315 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 316 win->lines[i] = lp; 317 lp->line = &win->wspace[i * ncols]; 318 #ifdef DEBUG 319 lp->sentinel = SENTINEL_VALUE; 320 #endif 321 lp->firstchp = &lp->firstch; 322 lp->lastchp = &lp->lastch; 323 if (ispad) { 324 lp->firstch = 0; 325 lp->lastch = ncols; 326 } else { 327 lp->firstch = ncols; 328 lp->lastch = 0; 329 } 330 } 331 } 332 #ifdef DEBUG 333 __CTRACE("makenew: ncols = %d\n", ncols); 334 #endif 335 win->cury = win->curx = 0; 336 win->maxy = nlines; 337 win->maxx = ncols; 338 win->reqy = nlines; 339 win->reqx = ncols; 340 341 win->begy = by; 342 win->begx = bx; 343 win->flags = (__IDLINE | __IDCHAR); 344 win->delay = -1; 345 win->wattr = 0; 346 win->bch = ' '; 347 if (__using_color) 348 win->battr = __default_color; 349 else 350 win->battr = 0; 351 win->scr_t = 0; 352 win->scr_b = win->maxy - 1; 353 if (ispad) 354 win->flags |= __ISPAD; 355 else 356 __swflags(win); 357 #ifdef DEBUG 358 __CTRACE("makenew: win->wattr = %08x\n", win->wattr); 359 __CTRACE("makenew: win->flags = %#.4x\n", win->flags); 360 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 361 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 362 __CTRACE("makenew: win->begy = %d\n", win->begy); 363 __CTRACE("makenew: win->begx = %d\n", win->begx); 364 __CTRACE("makenew: win->bch = %s\n", unctrl(win->bch)); 365 __CTRACE("makenew: win->battr = %08x\n", win->battr); 366 __CTRACE("makenew: win->scr_t = %d\n", win->scr_t); 367 __CTRACE("makenew: win->scr_b = %d\n", win->scr_b); 368 #endif 369 return (win); 370 } 371 372 void 373 __swflags(WINDOW *win) 374 { 375 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 376 if (win->begx + win->maxx == COLS && !(win->flags & __ISPAD)) { 377 win->flags |= __ENDLINE; 378 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 379 win->flags |= __FULLWIN; 380 if (win->begy + win->maxy == LINES) 381 win->flags |= __SCROLLWIN; 382 } 383 } 384
Indexes created Mon Sep 22 10:09:38 GMT 2025