newwin.c revision 1.15
1 /* $NetBSD: newwin.c,v 1.15 2000/04/14 17:35:15 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. 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 1.15 2000/04/14 17:35:15 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 #undef nl /* Don't need it here, and it interferes. */ 51 52 extern struct __winlist *winlistp; 53 54 static WINDOW *__makenew __P((int, int, int, int, int)); 55 56 void __set_subwin __P((WINDOW *, WINDOW *)); 57 58 /* 59 * newwin -- 60 * Allocate space for and set up defaults for a new window. 61 */ 62 WINDOW * 63 newwin(nl, nc, by, bx) 64 int nl, nc, by, bx; 65 { 66 WINDOW *win; 67 __LINE *lp; 68 int i, j; 69 __LDATA *sp; 70 71 if (nl == 0) 72 nl = LINES - by; 73 if (nc == 0) 74 nc = COLS - bx; 75 76 if ((win = __makenew(nl, nc, by, bx, 0)) == NULL) 77 return (NULL); 78 79 win->nextp = win; 80 win->ch_off = 0; 81 win->orig = NULL; 82 win->delay = -1; 83 84 #ifdef DEBUG 85 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 86 #endif 87 88 for (i = 0; i < nl; i++) { 89 lp = win->lines[i]; 90 lp->flags = 0; 91 for (sp = lp->line, j = 0; j < nc; j++, sp++) { 92 sp->ch = ' '; 93 sp->attr = 0; 94 } 95 lp->hash = __hash((char *)(void *)lp->line, 96 (int) (nc * __LDATASIZE)); 97 } 98 return (win); 99 } 100 101 WINDOW * 102 subwin(orig, nl, nc, by, bx) 103 WINDOW *orig; 104 int by, bx, nl, nc; 105 { 106 int i; 107 __LINE *lp; 108 WINDOW *win; 109 110 /* Make sure window fits inside the original one. */ 111 #ifdef DEBUG 112 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx); 113 #endif 114 if (by < orig->begy || bx < orig->begx 115 || by + nl > orig->maxy + orig->begy 116 || bx + nc > orig->maxx + orig->begx) 117 return (NULL); 118 if (nl == 0) 119 nl = orig->maxy + orig->begy - by; 120 if (nc == 0) 121 nc = orig->maxx + orig->begx - bx; 122 if ((win = __makenew(nl, nc, by, bx, 1)) == NULL) 123 return (NULL); 124 win->nextp = orig->nextp; 125 orig->nextp = win; 126 win->orig = orig; 127 128 /* Initialize flags here so that refresh can also use __set_subwin. */ 129 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 130 lp->flags = 0; 131 __set_subwin(orig, win); 132 return (win); 133 } 134 /* 135 * This code is shared with mvwin(). 136 */ 137 void 138 __set_subwin(orig, win) 139 WINDOW *orig, *win; 140 { 141 int i; 142 __LINE *lp, *olp; 143 144 win->ch_off = win->begx - orig->begx; 145 /* Point line pointers to line space. */ 146 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 147 win->lines[i] = lp; 148 olp = orig->lines[i + win->begy - orig->begy]; 149 lp->line = &olp->line[win->begx - orig->begx]; 150 lp->firstchp = &olp->firstch; 151 lp->lastchp = &olp->lastch; 152 lp->hash = __hash((char *)(void *)lp->line, 153 (int) (win->maxx * __LDATASIZE)); 154 } 155 156 #ifdef DEBUG 157 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 158 #endif 159 } 160 /* 161 * __makenew -- 162 * Set up a window buffer and returns a pointer to it. 163 */ 164 static WINDOW * 165 __makenew(nl, nc, by, bx, sub) 166 int by, bx, nl, nc; 167 int sub; 168 { 169 WINDOW *win; 170 __LINE *lp; 171 struct __winlist *wlp, *wlp2; 172 int i; 173 174 175 #ifdef DEBUG 176 __CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx); 177 #endif 178 if ((win = malloc(sizeof(*win))) == NULL) 179 return (NULL); 180 #ifdef DEBUG 181 __CTRACE("makenew: nl = %d\n", nl); 182 #endif 183 184 /* Set up line pointer array and line space. */ 185 if ((win->lines = malloc(nl * sizeof(__LINE *))) == NULL) { 186 free(win); 187 return NULL; 188 } 189 if ((win->lspace = malloc(nl * sizeof(__LINE))) == NULL) { 190 free(win); 191 free(win->lines); 192 return NULL; 193 } 194 /* Don't allocate window and line space if it's a subwindow */ 195 if (!sub) { 196 /* 197 * Allocate window space in one chunk. 198 */ 199 if ((win->wspace = 200 malloc(nc * nl * sizeof(__LDATA))) == NULL) { 201 free(win->lines); 202 free(win->lspace); 203 free(win); 204 return NULL; 205 } 206 /* 207 * Append window to window list. 208 */ 209 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 210 free(win->wspace); 211 free(win->lines); 212 free(win->lspace); 213 free(win); 214 return NULL; 215 } 216 wlp->winp = win; 217 wlp->nextp = NULL; 218 if (__winlistp == NULL) 219 __winlistp = wlp; 220 else { 221 wlp2 = __winlistp; 222 while (wlp2->nextp != NULL) 223 wlp2 = wlp2->nextp; 224 wlp2->nextp = wlp; 225 } 226 /* 227 * Point line pointers to line space, and lines themselves into 228 * window space. 229 */ 230 for (lp = win->lspace, i = 0; i < nl; i++, lp++) { 231 win->lines[i] = lp; 232 lp->line = &win->wspace[i * nc]; 233 lp->firstchp = &lp->firstch; 234 lp->lastchp = &lp->lastch; 235 lp->firstch = 0; 236 lp->lastch = 0; 237 } 238 } 239 #ifdef DEBUG 240 __CTRACE("makenew: nc = %d\n", nc); 241 #endif 242 win->cury = win->curx = 0; 243 win->maxy = nl; 244 win->maxx = nc; 245 246 win->begy = by; 247 win->begx = bx; 248 win->flags = 0; 249 win->wattr = 0; 250 win->bchar = ' '; 251 win->battr = 0; 252 __swflags(win); 253 #ifdef DEBUG 254 __CTRACE("makenew: win->wattr = %0.2o\n", win->wattr); 255 __CTRACE("makenew: win->flags = %0.2o\n", win->flags); 256 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 257 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 258 __CTRACE("makenew: win->begy = %d\n", win->begy); 259 __CTRACE("makenew: win->begx = %d\n", win->begx); 260 #endif 261 return (win); 262 } 263 264 void 265 __swflags(win) 266 WINDOW *win; 267 { 268 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 269 if (win->begx + win->maxx == COLS) { 270 win->flags |= __ENDLINE; 271 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 272 win->flags |= __FULLWIN; 273 if (win->begy + win->maxy == LINES) 274 win->flags |= __SCROLLWIN; 275 } 276 } 277
Indexes created Mon Sep 22 13:09:51 GMT 2025