1 /* $NetBSD: newwin.c,v 1.36 2003/06/09 06:58:11 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 1.36 2003/06/09 06:58:11 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 if (orig == NULL) 66 return NULL; 67 68 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx, 69 FALSE); 70 } 71 72 /* 73 * subpad -- 74 * Create a new pad in the same manner as subwin but (by, bx) 75 * are relative to the origin of window orig instead of absolute. 76 */ 77 WINDOW * 78 subpad(WINDOW *orig, int nlines, int ncols, int by, int bx) 79 { 80 if (orig == NULL) 81 return NULL; 82 83 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx, 84 TRUE); 85 } 86 87 /* 88 * dupwin -- 89 * Create a copy of the given window. 90 */ 91 WINDOW * 92 dupwin(WINDOW *win) 93 { 94 WINDOW *new_one; 95 96 if ((new_one = __newwin(_cursesi_screen, win->maxy, win->maxx, 97 win->begy, win->begx, FALSE)) == NULL) 98 return NULL; 99 100 overwrite(win, new_one); 101 return new_one; 102 } 103 104 /* 105 * newwin -- 106 * Allocate space for and set up defaults for a new window. 107 */ 108 WINDOW * 109 newwin(int nlines, int ncols, int by, int bx) 110 { 111 return __newwin(_cursesi_screen, nlines, ncols, by, bx, FALSE); 112 } 113 114 /* 115 * newpad -- 116 * Allocate space for and set up defaults for a new pad. 117 */ 118 WINDOW * 119 newpad(int nlines, int ncols) 120 { 121 if (nlines < 1 || ncols < 1) 122 return NULL; 123 return __newwin(_cursesi_screen, nlines, ncols, 0, 0, TRUE); 124 } 125 126 WINDOW * 127 __newwin(SCREEN *screen, int nlines, int ncols, int by, int bx, int ispad) 128 { 129 WINDOW *win; 130 __LINE *lp; 131 int i, j; 132 int maxy, maxx; 133 __LDATA *sp; 134 135 if (by < 0 || bx < 0) 136 return (NULL); 137 138 maxy = nlines > 0 ? nlines : LINES - by + nlines; 139 maxx = ncols > 0 ? ncols : COLS - bx + ncols; 140 141 if ((win = __makenew(screen, maxy, maxx, by, bx, 0, ispad)) == NULL) 142 return (NULL); 143 144 win->nextp = win; 145 win->ch_off = 0; 146 win->orig = NULL; 147 win->reqy = nlines; 148 win->reqx = ncols; 149 150 #ifdef DEBUG 151 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 152 #endif 153 154 for (i = 0; i < maxy; i++) { 155 lp = win->lines[i]; 156 if (ispad) 157 lp->flags = __ISDIRTY; 158 else 159 lp->flags = 0; 160 for (sp = lp->line, j = 0; j < maxx; j++, sp++) { 161 sp->ch = ' '; 162 sp->bch = ' '; 163 sp->attr = 0; 164 if (__using_color) 165 sp->battr = __default_color; 166 else 167 sp->battr = 0; 168 } 169 lp->hash = __hash((char *)(void *)lp->line, 170 (size_t) (ncols * __LDATASIZE)); 171 } 172 return (win); 173 } 174 175 WINDOW * 176 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 177 { 178 if (orig == NULL || orig->orig != NULL) 179 return NULL; 180 181 return __subwin(orig, nlines, ncols, by, bx, TRUE); 182 } 183 184 WINDOW * 185 __subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, int ispad) 186 { 187 int i; 188 __LINE *lp; 189 WINDOW *win; 190 int maxy, maxx; 191 192 /* Make sure window fits inside the original one. */ 193 #ifdef DEBUG 194 __CTRACE("subwin: (%p, %d, %d, %d, %d, %d)\n", orig, nlines, ncols, 195 by, bx, ispad); 196 #endif 197 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines; 198 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols; 199 if (by < orig->begy || bx < orig->begx 200 || by + maxy > orig->maxy + orig->begy 201 || bx + maxx > orig->maxx + orig->begx) 202 return (NULL); 203 if ((win = __makenew(_cursesi_screen, maxy, maxx, 204 by, bx, 1, ispad)) == NULL) 205 return (NULL); 206 win->reqy = nlines; 207 win->reqx = ncols; 208 win->nextp = orig->nextp; 209 orig->nextp = win; 210 win->orig = orig; 211 212 /* Initialize flags here so that refresh can also use __set_subwin. */ 213 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 214 lp->flags = 0; 215 __set_subwin(orig, win); 216 return (win); 217 } 218 /* 219 * This code is shared with mvwin(). 220 */ 221 void 222 __set_subwin(WINDOW *orig, WINDOW *win) 223 { 224 int i; 225 __LINE *lp, *olp; 226 227 win->ch_off = win->begx - orig->begx; 228 /* Point line pointers to line space. */ 229 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 230 win->lines[i] = lp; 231 olp = orig->lines[i + win->begy - orig->begy]; 232 #ifdef DEBUG 233 lp->sentinel = SENTINEL_VALUE; 234 #endif 235 lp->line = &olp->line[win->ch_off]; 236 lp->firstchp = &olp->firstch; 237 lp->lastchp = &olp->lastch; 238 lp->hash = __hash((char *)(void *)lp->line, 239 (size_t) (win->maxx * __LDATASIZE)); 240 } 241 242 #ifdef DEBUG 243 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 244 #endif 245 } 246 /* 247 * __makenew -- 248 * Set up a window buffer and returns a pointer to it. 249 */ 250 static WINDOW * 251 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 252 int ispad) 253 { 254 WINDOW *win; 255 __LINE *lp; 256 struct __winlist *wlp, *wlp2; 257 int i; 258 259 260 #ifdef DEBUG 261 __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx); 262 #endif 263 if (nlines <= 0 || ncols <= 0) 264 return NULL; 265 266 if ((win = malloc(sizeof(WINDOW))) == NULL) 267 return (NULL); 268 #ifdef DEBUG 269 __CTRACE("makenew: win = %p\n", win); 270 #endif 271 272 /* Set up line pointer array and line space. */ 273 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 274 free(win); 275 return NULL; 276 } 277 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 278 free(win); 279 free(win->lines); 280 return NULL; 281 } 282 /* Don't allocate window and line space if it's a subwindow */ 283 if (!sub) { 284 /* 285 * Allocate window space in one chunk. 286 */ 287 if ((win->wspace = 288 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 289 free(win->lines); 290 free(win->lspace); 291 free(win); 292 return NULL; 293 } 294 /* 295 * Append window to window list. 296 */ 297 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 298 free(win->wspace); 299 free(win->lines); 300 free(win->lspace); 301 free(win); 302 return NULL; 303 } 304 wlp->winp = win; 305 wlp->nextp = NULL; 306 if (screen->winlistp == NULL) 307 screen->winlistp = wlp; 308 else { 309 wlp2 = screen->winlistp; 310 while (wlp2->nextp != NULL) 311 wlp2 = wlp2->nextp; 312 wlp2->nextp = wlp; 313 } 314 /* 315 * Point line pointers to line space, and lines themselves into 316 * window space. 317 */ 318 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 319 win->lines[i] = lp; 320 lp->line = &win->wspace[i * ncols]; 321 #ifdef DEBUG 322 lp->sentinel = SENTINEL_VALUE; 323 #endif 324 lp->firstchp = &lp->firstch; 325 lp->lastchp = &lp->lastch; 326 if (ispad) { 327 lp->firstch = 0; 328 lp->lastch = ncols; 329 } else { 330 lp->firstch = ncols; 331 lp->lastch = 0; 332 } 333 } 334 } 335 #ifdef DEBUG 336 __CTRACE("makenew: ncols = %d\n", ncols); 337 #endif 338 win->cury = win->curx = 0; 339 win->maxy = nlines; 340 win->maxx = ncols; 341 win->reqy = nlines; 342 win->reqx = ncols; 343 344 win->begy = by; 345 win->begx = bx; 346 win->flags = (__IDLINE | __IDCHAR); 347 win->delay = -1; 348 win->wattr = 0; 349 win->bch = ' '; 350 if (__using_color) 351 win->battr = __default_color; 352 else 353 win->battr = 0; 354 win->scr_t = 0; 355 win->scr_b = win->maxy - 1; 356 if (ispad) 357 win->flags |= __ISPAD; 358 else 359 __swflags(win); 360 #ifdef DEBUG 361 __CTRACE("makenew: win->wattr = %08x\n", win->wattr); 362 __CTRACE("makenew: win->flags = %#.4x\n", win->flags); 363 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 364 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 365 __CTRACE("makenew: win->begy = %d\n", win->begy); 366 __CTRACE("makenew: win->begx = %d\n", win->begx); 367 __CTRACE("makenew: win->bch = %s\n", unctrl(win->bch)); 368 __CTRACE("makenew: win->battr = %08x\n", win->battr); 369 __CTRACE("makenew: win->scr_t = %d\n", win->scr_t); 370 __CTRACE("makenew: win->scr_b = %d\n", win->scr_b); 371 #endif 372 return (win); 373 } 374 375 void 376 __swflags(WINDOW *win) 377 { 378 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 379 if (win->begx + win->maxx == COLS && !(win->flags & __ISPAD)) { 380 win->flags |= __ENDLINE; 381 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 382 win->flags |= __FULLWIN; 383 if (win->begy + win->maxy == LINES) 384 win->flags |= __SCROLLWIN; 385 } 386 } 387