newwin.c revision 1.16
1 /* $NetBSD: newwin.c,v 1.16 2000/04/15 13:17:04 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 1.16 2000/04/15 13:17:04 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 #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(int nl, int nc, int by, int bx) 64 { 65 WINDOW *win; 66 __LINE *lp; 67 int i, j; 68 __LDATA *sp; 69 70 if (nl == 0) 71 nl = LINES - by; 72 if (nc == 0) 73 nc = COLS - bx; 74 75 if ((win = __makenew(nl, nc, by, bx, 0)) == NULL) 76 return (NULL); 77 78 win->nextp = win; 79 win->ch_off = 0; 80 win->orig = NULL; 81 win->delay = -1; 82 83 #ifdef DEBUG 84 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 85 #endif 86 87 for (i = 0; i < nl; i++) { 88 lp = win->lines[i]; 89 lp->flags = 0; 90 for (sp = lp->line, j = 0; j < nc; j++, sp++) { 91 sp->ch = ' '; 92 sp->attr = 0; 93 } 94 lp->hash = __hash((char *)(void *)lp->line, 95 (int) (nc * __LDATASIZE)); 96 } 97 return (win); 98 } 99 100 WINDOW * 101 subwin(WINDOW *orig, int nl, int nc, int by, int bx) 102 { 103 int i; 104 __LINE *lp; 105 WINDOW *win; 106 107 /* Make sure window fits inside the original one. */ 108 #ifdef DEBUG 109 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx); 110 #endif 111 if (by < orig->begy || bx < orig->begx 112 || by + nl > orig->maxy + orig->begy 113 || bx + nc > orig->maxx + orig->begx) 114 return (NULL); 115 if (nl == 0) 116 nl = orig->maxy + orig->begy - by; 117 if (nc == 0) 118 nc = orig->maxx + orig->begx - bx; 119 if ((win = __makenew(nl, nc, by, bx, 1)) == NULL) 120 return (NULL); 121 win->nextp = orig->nextp; 122 orig->nextp = win; 123 win->orig = orig; 124 125 /* Initialize flags here so that refresh can also use __set_subwin. */ 126 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 127 lp->flags = 0; 128 __set_subwin(orig, win); 129 return (win); 130 } 131 /* 132 * This code is shared with mvwin(). 133 */ 134 void 135 __set_subwin(WINDOW *orig, WINDOW *win) 136 { 137 int i; 138 __LINE *lp, *olp; 139 140 win->ch_off = win->begx - orig->begx; 141 /* Point line pointers to line space. */ 142 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 143 win->lines[i] = lp; 144 olp = orig->lines[i + win->begy - orig->begy]; 145 lp->line = &olp->line[win->begx - orig->begx]; 146 lp->firstchp = &olp->firstch; 147 lp->lastchp = &olp->lastch; 148 lp->hash = __hash((char *)(void *)lp->line, 149 (int) (win->maxx * __LDATASIZE)); 150 } 151 152 #ifdef DEBUG 153 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 154 #endif 155 } 156 /* 157 * __makenew -- 158 * Set up a window buffer and returns a pointer to it. 159 */ 160 static WINDOW * 161 __makenew(nl, nc, by, bx, sub) 162 int by, bx, nl, nc; 163 int sub; 164 { 165 WINDOW *win; 166 __LINE *lp; 167 struct __winlist *wlp, *wlp2; 168 int i; 169 170 171 #ifdef DEBUG 172 __CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx); 173 #endif 174 if ((win = malloc(sizeof(*win))) == NULL) 175 return (NULL); 176 #ifdef DEBUG 177 __CTRACE("makenew: nl = %d\n", nl); 178 #endif 179 180 /* Set up line pointer array and line space. */ 181 if ((win->lines = malloc(nl * sizeof(__LINE *))) == NULL) { 182 free(win); 183 return NULL; 184 } 185 if ((win->lspace = malloc(nl * sizeof(__LINE))) == NULL) { 186 free(win); 187 free(win->lines); 188 return NULL; 189 } 190 /* Don't allocate window and line space if it's a subwindow */ 191 if (!sub) { 192 /* 193 * Allocate window space in one chunk. 194 */ 195 if ((win->wspace = 196 malloc(nc * nl * sizeof(__LDATA))) == NULL) { 197 free(win->lines); 198 free(win->lspace); 199 free(win); 200 return NULL; 201 } 202 /* 203 * Append window to window list. 204 */ 205 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 206 free(win->wspace); 207 free(win->lines); 208 free(win->lspace); 209 free(win); 210 return NULL; 211 } 212 wlp->winp = win; 213 wlp->nextp = NULL; 214 if (__winlistp == NULL) 215 __winlistp = wlp; 216 else { 217 wlp2 = __winlistp; 218 while (wlp2->nextp != NULL) 219 wlp2 = wlp2->nextp; 220 wlp2->nextp = wlp; 221 } 222 /* 223 * Point line pointers to line space, and lines themselves into 224 * window space. 225 */ 226 for (lp = win->lspace, i = 0; i < nl; i++, lp++) { 227 win->lines[i] = lp; 228 lp->line = &win->wspace[i * nc]; 229 lp->firstchp = &lp->firstch; 230 lp->lastchp = &lp->lastch; 231 lp->firstch = 0; 232 lp->lastch = 0; 233 } 234 } 235 #ifdef DEBUG 236 __CTRACE("makenew: nc = %d\n", nc); 237 #endif 238 win->cury = win->curx = 0; 239 win->maxy = nl; 240 win->maxx = nc; 241 242 win->begy = by; 243 win->begx = bx; 244 win->flags = 0; 245 win->wattr = 0; 246 win->bchar = ' '; 247 win->battr = 0; 248 __swflags(win); 249 #ifdef DEBUG 250 __CTRACE("makenew: win->wattr = %0.2o\n", win->wattr); 251 __CTRACE("makenew: win->flags = %0.2o\n", win->flags); 252 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 253 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 254 __CTRACE("makenew: win->begy = %d\n", win->begy); 255 __CTRACE("makenew: win->begx = %d\n", win->begx); 256 #endif 257 return (win); 258 } 259 260 void 261 __swflags(WINDOW *win) 262 { 263 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 264 if (win->begx + win->maxx == COLS) { 265 win->flags |= __ENDLINE; 266 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 267 win->flags |= __FULLWIN; 268 if (win->begy + win->maxy == LINES) 269 win->flags |= __SCROLLWIN; 270 } 271 } 272
Indexes created Sun Sep 21 20:09:37 GMT 2025