newwin.c revision 1.27
1 /* $NetBSD: newwin.c,v 1.27 2001/12/11 11:18:17 blymn 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 1.27 2001/12/11 11:18:17 blymn 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 sp->battr = 0; 129 } 130 lp->hash = __hash((char *)(void *)lp->line, 131 (int) (ncols * __LDATASIZE)); 132 } 133 return (win); 134 } 135 136 WINDOW * 137 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 138 { 139 int i; 140 __LINE *lp; 141 WINDOW *win; 142 143 /* Make sure window fits inside the original one. */ 144 #ifdef DEBUG 145 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nlines, ncols, by, bx); 146 #endif 147 if (by < orig->begy || bx < orig->begx 148 || by + nlines > orig->maxy + orig->begy 149 || bx + ncols > orig->maxx + orig->begx) 150 return (NULL); 151 if (nlines == 0) 152 nlines = orig->maxy + orig->begy - by; 153 if (ncols == 0) 154 ncols = orig->maxx + orig->begx - bx; 155 if ((win = __makenew(_cursesi_screen, nlines, ncols, 156 by, bx, 1)) == NULL) 157 return (NULL); 158 win->nextp = orig->nextp; 159 orig->nextp = win; 160 win->orig = orig; 161 162 /* Initialize flags here so that refresh can also use __set_subwin. */ 163 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 164 lp->flags = 0; 165 __set_subwin(orig, win); 166 return (win); 167 } 168 /* 169 * This code is shared with mvwin(). 170 */ 171 void 172 __set_subwin(WINDOW *orig, WINDOW *win) 173 { 174 int i; 175 __LINE *lp, *olp; 176 177 win->ch_off = win->begx - orig->begx; 178 /* Point line pointers to line space. */ 179 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 180 win->lines[i] = lp; 181 olp = orig->lines[i + win->begy - orig->begy]; 182 lp->line = &olp->line[win->ch_off]; 183 lp->firstchp = &olp->firstch; 184 lp->lastchp = &olp->lastch; 185 lp->hash = __hash((char *)(void *)lp->line, 186 (int) (win->maxx * __LDATASIZE)); 187 } 188 189 #ifdef DEBUG 190 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 191 #endif 192 } 193 /* 194 * __makenew -- 195 * Set up a window buffer and returns a pointer to it. 196 */ 197 static WINDOW * 198 __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub) 199 { 200 WINDOW *win; 201 __LINE *lp; 202 struct __winlist *wlp, *wlp2; 203 int i; 204 205 206 #ifdef DEBUG 207 __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx); 208 #endif 209 if ((win = malloc(sizeof(WINDOW))) == NULL) 210 return (NULL); 211 #ifdef DEBUG 212 __CTRACE("makenew: nlines = %d\n", nlines); 213 #endif 214 215 /* Set up line pointer array and line space. */ 216 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 217 free(win); 218 return NULL; 219 } 220 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 221 free(win); 222 free(win->lines); 223 return NULL; 224 } 225 /* Don't allocate window and line space if it's a subwindow */ 226 if (!sub) { 227 /* 228 * Allocate window space in one chunk. 229 */ 230 if ((win->wspace = 231 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 232 free(win->lines); 233 free(win->lspace); 234 free(win); 235 return NULL; 236 } 237 /* 238 * Append window to window list. 239 */ 240 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 241 free(win->wspace); 242 free(win->lines); 243 free(win->lspace); 244 free(win); 245 return NULL; 246 } 247 wlp->winp = win; 248 wlp->nextp = NULL; 249 if (screen->winlistp == NULL) 250 screen->winlistp = wlp; 251 else { 252 wlp2 = screen->winlistp; 253 while (wlp2->nextp != NULL) 254 wlp2 = wlp2->nextp; 255 wlp2->nextp = wlp; 256 } 257 /* 258 * Point line pointers to line space, and lines themselves into 259 * window space. 260 */ 261 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 262 win->lines[i] = lp; 263 lp->line = &win->wspace[i * ncols]; 264 lp->firstchp = &lp->firstch; 265 lp->lastchp = &lp->lastch; 266 lp->firstch = 0; 267 lp->lastch = 0; 268 } 269 } 270 #ifdef DEBUG 271 __CTRACE("makenew: ncols = %d\n", ncols); 272 #endif 273 win->cury = win->curx = 0; 274 win->maxy = nlines; 275 win->maxx = ncols; 276 277 win->begy = by; 278 win->begx = bx; 279 win->flags = 0; 280 win->delay = -1; 281 win->wattr = 0; 282 win->bch = ' '; 283 win->battr = 0; 284 win->scr_t = 0; 285 win->scr_b = win->maxy - 1; 286 __swflags(win); 287 #ifdef DEBUG 288 __CTRACE("makenew: win->wattr = %0.2o\n", win->wattr); 289 __CTRACE("makenew: win->flags = %0.2o\n", win->flags); 290 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 291 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 292 __CTRACE("makenew: win->begy = %d\n", win->begy); 293 __CTRACE("makenew: win->begx = %d\n", win->begx); 294 __CTRACE("makenew: win->scr_t = %d\n", win->scr_t); 295 __CTRACE("makenew: win->scr_b = %d\n", win->scr_b); 296 #endif 297 return (win); 298 } 299 300 void 301 __swflags(WINDOW *win) 302 { 303 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 304 if (win->begx + win->maxx == COLS) { 305 win->flags |= __ENDLINE; 306 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 307 win->flags |= __FULLWIN; 308 if (win->begy + win->maxy == LINES) 309 win->flags |= __SCROLLWIN; 310 } 311 } 312
Indexes created Sun Sep 21 14:09:52 GMT 2025