newwin.c revision 1.34
1 /* $NetBSD: newwin.c,v 1.34 2003/02/17 11:07:20 dsl 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 1.34 2003/02/17 11:07:20 dsl 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 maxy = nlines > 0 ? nlines : LINES - by + nlines; 136 maxx = ncols > 0 ? ncols : COLS - bx + ncols; 137 138 if ((win = __makenew(screen, maxy, maxx, by, bx, 0, ispad)) == NULL) 139 return (NULL); 140 141 win->nextp = win; 142 win->ch_off = 0; 143 win->orig = NULL; 144 win->reqy = nlines; 145 win->reqx = ncols; 146 147 #ifdef DEBUG 148 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 149 #endif 150 151 for (i = 0; i < maxy; i++) { 152 lp = win->lines[i]; 153 lp->flags = 0; 154 for (sp = lp->line, j = 0; j < maxx; j++, sp++) { 155 sp->ch = ' '; 156 sp->bch = ' '; 157 sp->attr = 0; 158 if (__using_color) 159 sp->battr = __default_color; 160 else 161 sp->battr = 0; 162 } 163 lp->hash = __hash((char *)(void *)lp->line, 164 (size_t) (ncols * __LDATASIZE)); 165 } 166 return (win); 167 } 168 169 WINDOW * 170 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 171 { 172 if (orig == NULL || orig->orig != NULL) 173 return NULL; 174 175 return __subwin(orig, nlines, ncols, by, bx, 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 int maxy, maxx; 185 186 /* Make sure window fits inside the original one. */ 187 #ifdef DEBUG 188 __CTRACE("subwin: (%p, %d, %d, %d, %d, %d)\n", orig, nlines, ncols, 189 by, bx, ispad); 190 #endif 191 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines; 192 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols; 193 if (by < orig->begy || bx < orig->begx 194 || by + maxy > orig->maxy + orig->begy 195 || bx + maxx > orig->maxx + orig->begx) 196 return (NULL); 197 if ((win = __makenew(_cursesi_screen, maxy, maxx, 198 by, bx, 1, ispad)) == NULL) 199 return (NULL); 200 win->reqy = nlines; 201 win->reqx = ncols; 202 win->nextp = orig->nextp; 203 orig->nextp = win; 204 win->orig = orig; 205 206 /* Initialize flags here so that refresh can also use __set_subwin. */ 207 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 208 lp->flags = 0; 209 __set_subwin(orig, win); 210 return (win); 211 } 212 /* 213 * This code is shared with mvwin(). 214 */ 215 void 216 __set_subwin(WINDOW *orig, WINDOW *win) 217 { 218 int i; 219 __LINE *lp, *olp; 220 221 win->ch_off = win->begx - orig->begx; 222 /* Point line pointers to line space. */ 223 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 224 win->lines[i] = lp; 225 olp = orig->lines[i + win->begy - orig->begy]; 226 #ifdef DEBUG 227 lp->sentinel = SENTINEL_VALUE; 228 #endif 229 lp->line = &olp->line[win->ch_off]; 230 lp->firstchp = &olp->firstch; 231 lp->lastchp = &olp->lastch; 232 lp->hash = __hash((char *)(void *)lp->line, 233 (size_t) (win->maxx * __LDATASIZE)); 234 } 235 236 #ifdef DEBUG 237 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 238 #endif 239 } 240 /* 241 * __makenew -- 242 * Set up a window buffer and returns a pointer to it. 243 */ 244 static WINDOW * 245 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 246 int ispad) 247 { 248 WINDOW *win; 249 __LINE *lp; 250 struct __winlist *wlp, *wlp2; 251 int i; 252 253 254 #ifdef DEBUG 255 __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx); 256 #endif 257 if (nlines <= 0 || ncols <= 0) 258 return NULL; 259 260 if ((win = malloc(sizeof(WINDOW))) == NULL) 261 return (NULL); 262 #ifdef DEBUG 263 __CTRACE("makenew: win = %p\n", win); 264 #endif 265 266 /* Set up line pointer array and line space. */ 267 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 268 free(win); 269 return NULL; 270 } 271 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 272 free(win); 273 free(win->lines); 274 return NULL; 275 } 276 /* Don't allocate window and line space if it's a subwindow */ 277 if (!sub) { 278 /* 279 * Allocate window space in one chunk. 280 */ 281 if ((win->wspace = 282 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 283 free(win->lines); 284 free(win->lspace); 285 free(win); 286 return NULL; 287 } 288 /* 289 * Append window to window list. 290 */ 291 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 292 free(win->wspace); 293 free(win->lines); 294 free(win->lspace); 295 free(win); 296 return NULL; 297 } 298 wlp->winp = win; 299 wlp->nextp = NULL; 300 if (screen->winlistp == NULL) 301 screen->winlistp = wlp; 302 else { 303 wlp2 = screen->winlistp; 304 while (wlp2->nextp != NULL) 305 wlp2 = wlp2->nextp; 306 wlp2->nextp = wlp; 307 } 308 /* 309 * Point line pointers to line space, and lines themselves into 310 * window space. 311 */ 312 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 313 win->lines[i] = lp; 314 lp->line = &win->wspace[i * ncols]; 315 #ifdef DEBUG 316 lp->sentinel = SENTINEL_VALUE; 317 #endif 318 lp->firstchp = &lp->firstch; 319 lp->lastchp = &lp->lastch; 320 lp->firstch = ncols; 321 lp->lastch = 0; 322 } 323 } 324 #ifdef DEBUG 325 __CTRACE("makenew: ncols = %d\n", ncols); 326 #endif 327 win->cury = win->curx = 0; 328 win->maxy = nlines; 329 win->maxx = ncols; 330 win->reqy = nlines; 331 win->reqx = ncols; 332 333 win->begy = by; 334 win->begx = bx; 335 win->flags = (__IDLINE | __IDCHAR); 336 win->delay = -1; 337 win->wattr = 0; 338 win->bch = ' '; 339 if (__using_color) 340 win->battr = __default_color; 341 else 342 win->battr = 0; 343 win->scr_t = 0; 344 win->scr_b = win->maxy - 1; 345 if (ispad) 346 win->flags |= __ISPAD; 347 else 348 __swflags(win); 349 #ifdef DEBUG 350 __CTRACE("makenew: win->wattr = %08x\n", win->wattr); 351 __CTRACE("makenew: win->flags = %#.4x\n", win->flags); 352 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 353 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 354 __CTRACE("makenew: win->begy = %d\n", win->begy); 355 __CTRACE("makenew: win->begx = %d\n", win->begx); 356 __CTRACE("makenew: win->bch = %s\n", unctrl(win->bch)); 357 __CTRACE("makenew: win->battr = %08x\n", win->battr); 358 __CTRACE("makenew: win->scr_t = %d\n", win->scr_t); 359 __CTRACE("makenew: win->scr_b = %d\n", win->scr_b); 360 #endif 361 return (win); 362 } 363 364 void 365 __swflags(WINDOW *win) 366 { 367 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 368 if (win->begx + win->maxx == COLS && !(win->flags & __ISPAD)) { 369 win->flags |= __ENDLINE; 370 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 371 win->flags |= __FULLWIN; 372 if (win->begy + win->maxy == LINES) 373 win->flags |= __SCROLLWIN; 374 } 375 } 376
Indexes created Mon Sep 22 05:09:51 GMT 2025