newwin.c revision 1.46
1 /* $NetBSD: newwin.c,v 1.46 2008/04/14 20:33:15 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. 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 1.46 2008/04/14 20:33:15 jdc 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)) == NULL) 89 return NULL; 90 91 overwrite(win, new_one); 92 return new_one; 93 } 94 95 /* 96 * newwin -- 97 * Allocate space for and set up defaults for a new window. 98 */ 99 WINDOW * 100 newwin(int nlines, int ncols, int by, int bx) 101 { 102 return __newwin(_cursesi_screen, nlines, ncols, by, bx, FALSE); 103 } 104 105 /* 106 * newpad -- 107 * Allocate space for and set up defaults for a new pad. 108 */ 109 WINDOW * 110 newpad(int nlines, int ncols) 111 { 112 if (nlines < 1 || ncols < 1) 113 return NULL; 114 return __newwin(_cursesi_screen, nlines, ncols, 0, 0, TRUE); 115 } 116 117 WINDOW * 118 __newwin(SCREEN *screen, int nlines, int ncols, int by, int bx, int ispad) 119 { 120 WINDOW *win; 121 __LINE *lp; 122 int i, j; 123 int maxy, maxx; 124 __LDATA *sp; 125 126 if (by < 0 || bx < 0) 127 return (NULL); 128 129 maxy = nlines > 0 ? nlines : LINES - by + nlines; 130 maxx = ncols > 0 ? ncols : COLS - bx + ncols; 131 132 if ((win = __makenew(screen, maxy, maxx, by, bx, 0, ispad)) == NULL) 133 return (NULL); 134 135 win->bch = ' '; 136 if (__using_color) 137 win->battr = __default_color; 138 else 139 win->battr = 0; 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(__CTRACE_WINDOW, "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->attr = 0; 158 #ifndef HAVE_WCHAR 159 sp->ch = win->bch; 160 #else 161 sp->ch = ( wchar_t )btowc(( int ) win->bch ); 162 sp->nsp = NULL; 163 SET_WCOL( *sp, 1 ); 164 #endif /* HAVE_WCHAR */ 165 } 166 lp->hash = __hash((char *)(void *)lp->line, 167 (size_t) (ncols * __LDATASIZE)); 168 } 169 return (win); 170 } 171 172 WINDOW * 173 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 174 { 175 176 return __subwin(orig, nlines, ncols, by, bx, FALSE); 177 } 178 179 static WINDOW * 180 __subwin(WINDOW *orig, int nlines, int ncols, int by, int bx, int ispad) 181 { 182 int i; 183 __LINE *lp; 184 WINDOW *win; 185 int maxy, maxx; 186 187 #ifdef DEBUG 188 __CTRACE(__CTRACE_WINDOW, "subwin: (%p, %d, %d, %d, %d, %d)\n", 189 orig, nlines, ncols, by, bx, ispad); 190 #endif 191 if (orig == NULL || orig->orig != NULL) 192 return NULL; 193 194 /* Make sure window fits inside the original one. */ 195 maxy = nlines > 0 ? nlines : orig->maxy + orig->begy - by + nlines; 196 maxx = ncols > 0 ? ncols : orig->maxx + orig->begx - bx + ncols; 197 if (by < orig->begy || bx < orig->begx 198 || by + maxy > orig->maxy + orig->begy 199 || bx + maxx > orig->maxx + orig->begx) 200 return (NULL); 201 if ((win = __makenew(_cursesi_screen, maxy, maxx, 202 by, bx, 1, ispad)) == NULL) 203 return (NULL); 204 win->bch = orig->bch; 205 win->battr = orig->battr; 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 #ifdef HAVE_WCHAR 227 __LDATA *cp; 228 int j; 229 nschar_t *np; 230 #endif /* HAVE_WCHAR */ 231 232 win->ch_off = win->begx - orig->begx; 233 /* Point line pointers to line space. */ 234 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 235 win->lines[i] = lp; 236 olp = orig->lines[i + win->begy - orig->begy]; 237 #ifdef DEBUG 238 lp->sentinel = SENTINEL_VALUE; 239 #endif 240 lp->line = &olp->line[win->ch_off]; 241 lp->firstchp = &olp->firstch; 242 lp->lastchp = &olp->lastch; 243 #ifndef HAVE_WCHAR 244 lp->hash = __hash((char *)(void *)lp->line, 245 (size_t) (win->maxx * __LDATASIZE)); 246 #else 247 for ( cp = lp->line, j = 0; j < win->maxx; j++, cp++ ) { 248 lp->hash = __hash_more( &cp->ch, 249 sizeof( wchar_t ), lp->hash ); 250 lp->hash = __hash_more( &cp->attr, 251 sizeof( wchar_t ), lp->hash ); 252 if ( cp->nsp ) { 253 np = cp->nsp; 254 while ( np ) { 255 lp->hash = __hash_more( &np->ch, 256 sizeof( wchar_t ), lp->hash ); 257 np = np->next; 258 } 259 } 260 } 261 #endif /* HAVE_WCHAR */ 262 } 263 264 #ifdef DEBUG 265 __CTRACE(__CTRACE_WINDOW, "__set_subwin: win->ch_off = %d\n", 266 win->ch_off); 267 #endif 268 } 269 /* 270 * __makenew -- 271 * Set up a window buffer and returns a pointer to it. 272 */ 273 static WINDOW * 274 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub, 275 int ispad) 276 { 277 WINDOW *win; 278 __LINE *lp; 279 struct __winlist *wlp, *wlp2; 280 int i; 281 282 283 #ifdef DEBUG 284 __CTRACE(__CTRACE_WINDOW, "makenew: (%d, %d, %d, %d)\n", 285 nlines, ncols, by, bx); 286 #endif 287 if (nlines <= 0 || ncols <= 0) 288 return NULL; 289 290 if ((win = malloc(sizeof(WINDOW))) == NULL) 291 return (NULL); 292 #ifdef DEBUG 293 __CTRACE(__CTRACE_WINDOW, "makenew: win = %p\n", win); 294 #endif 295 296 /* Set up line pointer array and line space. */ 297 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 298 free(win); 299 return NULL; 300 } 301 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 302 free(win->lines); 303 free(win); 304 return NULL; 305 } 306 /* Don't allocate window and line space if it's a subwindow */ 307 if (sub) 308 win->wspace = NULL; 309 else { 310 /* 311 * Allocate window space in one chunk. 312 */ 313 if ((win->wspace = 314 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 315 free(win->lspace); 316 free(win->lines); 317 free(win); 318 return NULL; 319 } 320 /* 321 * Append window to window list. 322 */ 323 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 324 free(win->wspace); 325 free(win->lspace); 326 free(win->lines); 327 free(win); 328 return NULL; 329 } 330 wlp->winp = win; 331 wlp->nextp = NULL; 332 if (screen->winlistp == NULL) 333 screen->winlistp = wlp; 334 else { 335 wlp2 = screen->winlistp; 336 while (wlp2->nextp != NULL) 337 wlp2 = wlp2->nextp; 338 wlp2->nextp = wlp; 339 } 340 /* 341 * Point line pointers to line space, and lines themselves into 342 * window space. 343 */ 344 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 345 win->lines[i] = lp; 346 lp->line = &win->wspace[i * ncols]; 347 #ifdef DEBUG 348 lp->sentinel = SENTINEL_VALUE; 349 #endif 350 lp->firstchp = &lp->firstch; 351 lp->lastchp = &lp->lastch; 352 if (ispad) { 353 lp->firstch = 0; 354 lp->lastch = ncols; 355 } else { 356 lp->firstch = ncols; 357 lp->lastch = 0; 358 } 359 } 360 } 361 #ifdef DEBUG 362 __CTRACE(__CTRACE_WINDOW, "makenew: ncols = %d\n", ncols); 363 #endif 364 win->screen = screen; 365 win->cury = win->curx = 0; 366 win->maxy = nlines; 367 win->maxx = ncols; 368 win->reqy = nlines; 369 win->reqx = ncols; 370 371 win->begy = by; 372 win->begx = bx; 373 win->flags = (__IDLINE | __IDCHAR); 374 win->delay = -1; 375 win->wattr = 0; 376 #ifdef HAVE_WCHAR 377 win->bnsp = NULL; 378 SET_BGWCOL( *win, 1 ); 379 #endif /* HAVE_WCHAR */ 380 win->scr_t = 0; 381 win->scr_b = win->maxy - 1; 382 if (ispad) { 383 win->flags |= __ISPAD; 384 win->pbegy = 0; 385 win->pbegx = 0; 386 win->sbegy = 0; 387 win->sbegx = 0; 388 win->smaxy = 0; 389 win->smaxx = 0; 390 } else 391 __swflags(win); 392 #ifdef DEBUG 393 __CTRACE(__CTRACE_WINDOW, "makenew: win->wattr = %08x\n", win->wattr); 394 __CTRACE(__CTRACE_WINDOW, "makenew: win->flags = %#.4x\n", win->flags); 395 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxy = %d\n", win->maxy); 396 __CTRACE(__CTRACE_WINDOW, "makenew: win->maxx = %d\n", win->maxx); 397 __CTRACE(__CTRACE_WINDOW, "makenew: win->begy = %d\n", win->begy); 398 __CTRACE(__CTRACE_WINDOW, "makenew: win->begx = %d\n", win->begx); 399 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_t = %d\n", win->scr_t); 400 __CTRACE(__CTRACE_WINDOW, "makenew: win->scr_b = %d\n", win->scr_b); 401 #endif 402 return (win); 403 } 404 405 void 406 __swflags(WINDOW *win) 407 { 408 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 409 if (win->begx + win->maxx == COLS && !(win->flags & __ISPAD)) { 410 win->flags |= __ENDLINE; 411 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 412 win->flags |= __FULLWIN; 413 if (win->begy + win->maxy == LINES) 414 win->flags |= __SCROLLWIN; 415 } 416 } 417
Indexes created Sun Sep 21 14:09:52 GMT 2025