1 /* $NetBSD: newwin.c,v 1.33 2002/12/23 12:17:03 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 1.33 2002/12/23 12:17:03 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 = 97 newwin(win->maxy, win->maxx, win->begy, win->begx)) == 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 __LDATA *sp; 133 134 if (nlines == 0) 135 nlines = LINES - by; 136 if (ncols == 0) 137 ncols = COLS - bx; 138 139 if ((win = __makenew(screen, nlines, ncols, by, bx, 0, ispad)) == NULL) 140 return (NULL); 141 142 win->nextp = win; 143 win->ch_off = 0; 144 win->orig = NULL; 145 146 #ifdef DEBUG 147 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 148 #endif 149 150 for (i = 0; i < nlines; i++) { 151 lp = win->lines[i]; 152 lp->flags = 0; 153 for (sp = lp->line, j = 0; j < ncols; j++, sp++) { 154 sp->ch = ' '; 155 sp->bch = ' '; 156 sp->attr = 0; 157 if (__using_color) 158 sp->battr = __default_color; 159 else 160 sp->battr = 0; 161 } 162 lp->hash = __hash((char *)(void *)lp->line, 163 (size_t) (ncols * __LDATASIZE)); 164 } 165 return (win); 166 } 167 168 WINDOW * 169 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 170 { 171 if (orig == NULL) 172 return NULL; 173 174 return __subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx, 175 TRUE); 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; 184 185 /* Make sure window fits inside the original one. */ 186 #ifdef DEBUG 187 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d, %d)\n", orig, nlines, ncols, 188 by, bx, ispad); 189 #endif 190 if (by < orig->begy || bx < orig->begx 191 || by + nlines > orig->maxy + orig->begy 192 || bx + ncols > orig->maxx + orig->begx) 193 return (NULL); 194 if (nlines == 0) 195 nlines = orig->maxy + orig->begy - by; 196 if (ncols == 0) 197 ncols = orig->maxx + orig->begx - bx; 198 if ((win = __makenew(_cursesi_screen, nlines, ncols, 199 by, bx, 1, ispad)) == NULL) 200 return (NULL); 201 win->nextp = orig->nextp; 202 orig->nextp = win; 203 win->orig = orig; 204 205 /* Initialize flags here so that refresh can also use __set_subwin. */ 206 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 207 lp->flags = 0; 208 __set_subwin(orig, win); 209 return (win); 210 } 211 /* 212 * This code is shared with mvwin(). 213 */ 214 void 215 __set_subwin(WINDOW *orig, WINDOW *win) 216 { 217 int i; 218 __LINE *lp, *olp; 219 220 win->ch_off = win->begx - orig->begx; 221 /* Point line pointers to line space. */ 222 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 223 win->lines[i] = lp; 224 olp = orig->lines[i + win->begy - orig->begy]; 225 #ifdef DEBUG 226 lp->sentinel = SENTINEL_VALUE; 227 #endif 228 lp->line = &olp->line[win->ch_off]; 229 lp->firstchp = &olp->firstch; 230 lp->lastchp = &olp->lastch; 231 lp->hash = __hash((char *)(void *)lp->line, 232 (size_t) (win->maxx * __LDATASIZE)); 233 } 234 235 #ifdef DEBUG 236 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 237 #endif 238 } 239 /* 240 * __makenew -- 241 * Set up a window buffer and returns a pointer to it. 242 */ 243 static WINDOW * 244 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 245 int ispad) 246 { 247 WINDOW *win; 248 __LINE *lp; 249 struct __winlist *wlp, *wlp2; 250 int i; 251 252 253 #ifdef DEBUG 254 __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx); 255 #endif 256 if ((win = malloc(sizeof(WINDOW))) == NULL) 257 return (NULL); 258 #ifdef DEBUG 259 __CTRACE("makenew: win = %0.2o\n", win); 260 __CTRACE("makenew: nlines = %d\n", nlines); 261 #endif 262 263 /* Set up line pointer array and line space. */ 264 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 265 free(win); 266 return NULL; 267 } 268 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 269 free(win); 270 free(win->lines); 271 return NULL; 272 } 273 /* Don't allocate window and line space if it's a subwindow */ 274 if (!sub) { 275 /* 276 * Allocate window space in one chunk. 277 */ 278 if ((win->wspace = 279 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 280 free(win->lines); 281 free(win->lspace); 282 free(win); 283 return NULL; 284 } 285 /* 286 * Append window to window list. 287 */ 288 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 289 free(win->wspace); 290 free(win->lines); 291 free(win->lspace); 292 free(win); 293 return NULL; 294 } 295 wlp->winp = win; 296 wlp->nextp = NULL; 297 if (screen->winlistp == NULL) 298 screen->winlistp = wlp; 299 else { 300 wlp2 = screen->winlistp; 301 while (wlp2->nextp != NULL) 302 wlp2 = wlp2->nextp; 303 wlp2->nextp = wlp; 304 } 305 /* 306 * Point line pointers to line space, and lines themselves into 307 * window space. 308 */ 309 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 310 win->lines[i] = lp; 311 lp->line = &win->wspace[i * ncols]; 312 #ifdef DEBUG 313 lp->sentinel = SENTINEL_VALUE; 314 #endif 315 lp->firstchp = &lp->firstch; 316 lp->lastchp = &lp->lastch; 317 lp->firstch = ncols; 318 lp->lastch = 0; 319 } 320 } 321 #ifdef DEBUG 322 __CTRACE("makenew: ncols = %d\n", ncols); 323 #endif 324 win->cury = win->curx = 0; 325 win->maxy = nlines; 326 win->maxx = ncols; 327 328 win->begy = by; 329 win->begx = bx; 330 win->flags = (__IDLINE | __IDCHAR); 331 win->delay = -1; 332 win->wattr = 0; 333 win->bch = ' '; 334 if (__using_color) 335 win->battr = __default_color; 336 else 337 win->battr = 0; 338 win->scr_t = 0; 339 win->scr_b = win->maxy - 1; 340 if (ispad) 341 win->flags |= __ISPAD; 342 else 343 __swflags(win); 344 #ifdef DEBUG 345 __CTRACE("makenew: win->wattr = %08x\n", win->wattr); 346 __CTRACE("makenew: win->flags = %0.2o\n", win->flags); 347 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 348 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 349 __CTRACE("makenew: win->begy = %d\n", win->begy); 350 __CTRACE("makenew: win->begx = %d\n", win->begx); 351 __CTRACE("makenew: win->bch = %s\n", unctrl(win->bch)); 352 __CTRACE("makenew: win->battr = %08x\n", win->battr); 353 __CTRACE("makenew: win->scr_t = %d\n", win->scr_t); 354 __CTRACE("makenew: win->scr_b = %d\n", win->scr_b); 355 #endif 356 return (win); 357 } 358 359 void 360 __swflags(WINDOW *win) 361 { 362 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 363 if (win->begx + win->maxx == COLS && !(win->flags & __ISPAD)) { 364 win->flags |= __ENDLINE; 365 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 366 win->flags |= __FULLWIN; 367 if (win->begy + win->maxy == LINES) 368 win->flags |= __SCROLLWIN; 369 } 370 } 371