newwin.c revision 1.31
1 /* $NetBSD: newwin.c,v 1.31 2002/11/25 09:11:26 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 1.31 2002/11/25 09:11:26 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); 54 55 /* 56 * derwin -- 57 * Create a new window in the same manner as subwin but (by, bx) 58 * are relative to the origin of window orig instead of absolute. 59 */ 60 WINDOW * 61 derwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 62 { 63 if (orig == NULL) 64 return ERR; 65 66 return subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx); 67 } 68 69 /* 70 * dupwin -- 71 * Create a copy of the given window. 72 */ 73 WINDOW * 74 dupwin(WINDOW *win) 75 { 76 WINDOW *new_one; 77 78 if ((new_one = 79 newwin(win->maxy, win->maxx, win->begy, win->begx)) == NULL) 80 return NULL; 81 82 overwrite(win, new_one); 83 return new_one; 84 } 85 86 87 /* 88 * newwin -- 89 * Allocate space for and set up defaults for a new window. 90 */ 91 WINDOW * 92 newwin(int nlines, int ncols, int by, int bx) 93 { 94 return __newwin(_cursesi_screen, nlines, ncols, by, bx); 95 } 96 97 WINDOW * 98 __newwin(SCREEN *screen, int nlines, int ncols, int by, int bx) 99 { 100 WINDOW *win; 101 __LINE *lp; 102 int i, j; 103 __LDATA *sp; 104 105 if (nlines == 0) 106 nlines = LINES - by; 107 if (ncols == 0) 108 ncols = COLS - bx; 109 110 if ((win = __makenew(screen, nlines, ncols, by, bx, 0)) == NULL) 111 return (NULL); 112 113 win->nextp = win; 114 win->ch_off = 0; 115 win->orig = NULL; 116 117 #ifdef DEBUG 118 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 119 #endif 120 121 for (i = 0; i < nlines; i++) { 122 lp = win->lines[i]; 123 lp->flags = 0; 124 for (sp = lp->line, j = 0; j < ncols; j++, sp++) { 125 sp->ch = ' '; 126 sp->bch = ' '; 127 sp->attr = 0; 128 if (__using_color) 129 sp->battr = __default_color; 130 else 131 sp->battr = 0; 132 } 133 lp->hash = __hash((char *)(void *)lp->line, 134 (size_t) (ncols * __LDATASIZE)); 135 } 136 return (win); 137 } 138 139 WINDOW * 140 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 141 { 142 int i; 143 __LINE *lp; 144 WINDOW *win; 145 146 /* Make sure window fits inside the original one. */ 147 #ifdef DEBUG 148 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nlines, ncols, by, bx); 149 #endif 150 if (by < orig->begy || bx < orig->begx 151 || by + nlines > orig->maxy + orig->begy 152 || bx + ncols > orig->maxx + orig->begx) 153 return (NULL); 154 if (nlines == 0) 155 nlines = orig->maxy + orig->begy - by; 156 if (ncols == 0) 157 ncols = orig->maxx + orig->begx - bx; 158 if ((win = __makenew(_cursesi_screen, nlines, ncols, 159 by, bx, 1)) == NULL) 160 return (NULL); 161 win->nextp = orig->nextp; 162 orig->nextp = win; 163 win->orig = orig; 164 165 /* Initialize flags here so that refresh can also use __set_subwin. */ 166 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 167 lp->flags = 0; 168 __set_subwin(orig, win); 169 return (win); 170 } 171 /* 172 * This code is shared with mvwin(). 173 */ 174 void 175 __set_subwin(WINDOW *orig, WINDOW *win) 176 { 177 int i; 178 __LINE *lp, *olp; 179 180 win->ch_off = win->begx - orig->begx; 181 /* Point line pointers to line space. */ 182 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 183 win->lines[i] = lp; 184 olp = orig->lines[i + win->begy - orig->begy]; 185 #ifdef DEBUG 186 lp->sentinel = SENTINEL_VALUE; 187 #endif 188 lp->line = &olp->line[win->ch_off]; 189 lp->firstchp = &olp->firstch; 190 lp->lastchp = &olp->lastch; 191 lp->hash = __hash((char *)(void *)lp->line, 192 (size_t) (win->maxx * __LDATASIZE)); 193 } 194 195 #ifdef DEBUG 196 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 197 #endif 198 } 199 /* 200 * __makenew -- 201 * Set up a window buffer and returns a pointer to it. 202 */ 203 static WINDOW * 204 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub) 205 { 206 WINDOW *win; 207 __LINE *lp; 208 struct __winlist *wlp, *wlp2; 209 int i; 210 211 212 #ifdef DEBUG 213 __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx); 214 #endif 215 if ((win = malloc(sizeof(WINDOW))) == NULL) 216 return (NULL); 217 #ifdef DEBUG 218 __CTRACE("makenew: nlines = %d\n", nlines); 219 #endif 220 221 /* Set up line pointer array and line space. */ 222 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 223 free(win); 224 return NULL; 225 } 226 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 227 free(win); 228 free(win->lines); 229 return NULL; 230 } 231 /* Don't allocate window and line space if it's a subwindow */ 232 if (!sub) { 233 /* 234 * Allocate window space in one chunk. 235 */ 236 if ((win->wspace = 237 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 238 free(win->lines); 239 free(win->lspace); 240 free(win); 241 return NULL; 242 } 243 /* 244 * Append window to window list. 245 */ 246 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 247 free(win->wspace); 248 free(win->lines); 249 free(win->lspace); 250 free(win); 251 return NULL; 252 } 253 wlp->winp = win; 254 wlp->nextp = NULL; 255 if (screen->winlistp == NULL) 256 screen->winlistp = wlp; 257 else { 258 wlp2 = screen->winlistp; 259 while (wlp2->nextp != NULL) 260 wlp2 = wlp2->nextp; 261 wlp2->nextp = wlp; 262 } 263 /* 264 * Point line pointers to line space, and lines themselves into 265 * window space. 266 */ 267 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 268 win->lines[i] = lp; 269 lp->line = &win->wspace[i * ncols]; 270 #ifdef DEBUG 271 lp->sentinel = SENTINEL_VALUE; 272 #endif 273 lp->firstchp = &lp->firstch; 274 lp->lastchp = &lp->lastch; 275 lp->firstch = 0; 276 lp->lastch = 0; 277 } 278 } 279 #ifdef DEBUG 280 __CTRACE("makenew: ncols = %d\n", ncols); 281 #endif 282 win->cury = win->curx = 0; 283 win->maxy = nlines; 284 win->maxx = ncols; 285 286 win->begy = by; 287 win->begx = bx; 288 win->flags = (__IDLINE | __IDCHAR); 289 win->delay = -1; 290 win->wattr = 0; 291 win->bch = ' '; 292 if (__using_color) 293 win->battr = __default_color; 294 else 295 win->battr = 0; 296 win->scr_t = 0; 297 win->scr_b = win->maxy - 1; 298 __swflags(win); 299 #ifdef DEBUG 300 __CTRACE("makenew: win->wattr = %08x\n", win->wattr); 301 __CTRACE("makenew: win->flags = %0.2o\n", win->flags); 302 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 303 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 304 __CTRACE("makenew: win->begy = %d\n", win->begy); 305 __CTRACE("makenew: win->begx = %d\n", win->begx); 306 __CTRACE("makenew: win->bch = %s\n", unctrl(win->bch)); 307 __CTRACE("makenew: win->battr = %08x\n", win->battr); 308 __CTRACE("makenew: win->scr_t = %d\n", win->scr_t); 309 __CTRACE("makenew: win->scr_b = %d\n", win->scr_b); 310 #endif 311 return (win); 312 } 313 314 void 315 __swflags(WINDOW *win) 316 { 317 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 318 if (win->begx + win->maxx == COLS) { 319 win->flags |= __ENDLINE; 320 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 321 win->flags |= __FULLWIN; 322 if (win->begy + win->maxy == LINES) 323 win->flags |= __SCROLLWIN; 324 } 325 } 326
Indexes created Mon Sep 22 10:09:38 GMT 2025