newwin.c revision 1.17
1 /* $NetBSD: newwin.c,v 1.17 2000/04/15 22:53:46 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 1.17 2000/04/15 22:53:46 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(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 82 #ifdef DEBUG 83 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 84 #endif 85 86 for (i = 0; i < nl; i++) { 87 lp = win->lines[i]; 88 lp->flags = 0; 89 for (sp = lp->line, j = 0; j < nc; j++, sp++) { 90 sp->ch = ' '; 91 sp->attr = 0; 92 } 93 lp->hash = __hash((char *)(void *)lp->line, 94 (int) (nc * __LDATASIZE)); 95 } 96 return (win); 97 } 98 99 WINDOW * 100 subwin(WINDOW *orig, int nl, int nc, int by, int bx) 101 { 102 int i; 103 __LINE *lp; 104 WINDOW *win; 105 106 /* Make sure window fits inside the original one. */ 107 #ifdef DEBUG 108 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx); 109 #endif 110 if (by < orig->begy || bx < orig->begx 111 || by + nl > orig->maxy + orig->begy 112 || bx + nc > orig->maxx + orig->begx) 113 return (NULL); 114 if (nl == 0) 115 nl = orig->maxy + orig->begy - by; 116 if (nc == 0) 117 nc = orig->maxx + orig->begx - bx; 118 if ((win = __makenew(nl, nc, by, bx, 1)) == NULL) 119 return (NULL); 120 win->nextp = orig->nextp; 121 orig->nextp = win; 122 win->orig = orig; 123 124 /* Initialize flags here so that refresh can also use __set_subwin. */ 125 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 126 lp->flags = 0; 127 __set_subwin(orig, win); 128 return (win); 129 } 130 /* 131 * This code is shared with mvwin(). 132 */ 133 void 134 __set_subwin(WINDOW *orig, WINDOW *win) 135 { 136 int i; 137 __LINE *lp, *olp; 138 139 win->ch_off = win->begx - orig->begx; 140 /* Point line pointers to line space. */ 141 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 142 win->lines[i] = lp; 143 olp = orig->lines[i + win->begy - orig->begy]; 144 lp->line = &olp->line[win->begx - orig->begx]; 145 lp->firstchp = &olp->firstch; 146 lp->lastchp = &olp->lastch; 147 lp->hash = __hash((char *)(void *)lp->line, 148 (int) (win->maxx * __LDATASIZE)); 149 } 150 151 #ifdef DEBUG 152 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 153 #endif 154 } 155 /* 156 * __makenew -- 157 * Set up a window buffer and returns a pointer to it. 158 */ 159 static WINDOW * 160 __makenew(nl, nc, by, bx, sub) 161 int by, bx, nl, nc; 162 int sub; 163 { 164 WINDOW *win; 165 __LINE *lp; 166 struct __winlist *wlp, *wlp2; 167 int i; 168 169 170 #ifdef DEBUG 171 __CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx); 172 #endif 173 if ((win = malloc(sizeof(*win))) == NULL) 174 return (NULL); 175 #ifdef DEBUG 176 __CTRACE("makenew: nl = %d\n", nl); 177 #endif 178 179 /* Set up line pointer array and line space. */ 180 if ((win->lines = malloc(nl * sizeof(__LINE *))) == NULL) { 181 free(win); 182 return NULL; 183 } 184 if ((win->lspace = malloc(nl * sizeof(__LINE))) == NULL) { 185 free(win); 186 free(win->lines); 187 return NULL; 188 } 189 /* Don't allocate window and line space if it's a subwindow */ 190 if (!sub) { 191 /* 192 * Allocate window space in one chunk. 193 */ 194 if ((win->wspace = 195 malloc(nc * nl * sizeof(__LDATA))) == NULL) { 196 free(win->lines); 197 free(win->lspace); 198 free(win); 199 return NULL; 200 } 201 /* 202 * Append window to window list. 203 */ 204 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 205 free(win->wspace); 206 free(win->lines); 207 free(win->lspace); 208 free(win); 209 return NULL; 210 } 211 wlp->winp = win; 212 wlp->nextp = NULL; 213 if (__winlistp == NULL) 214 __winlistp = wlp; 215 else { 216 wlp2 = __winlistp; 217 while (wlp2->nextp != NULL) 218 wlp2 = wlp2->nextp; 219 wlp2->nextp = wlp; 220 } 221 /* 222 * Point line pointers to line space, and lines themselves into 223 * window space. 224 */ 225 for (lp = win->lspace, i = 0; i < nl; i++, lp++) { 226 win->lines[i] = lp; 227 lp->line = &win->wspace[i * nc]; 228 lp->firstchp = &lp->firstch; 229 lp->lastchp = &lp->lastch; 230 lp->firstch = 0; 231 lp->lastch = 0; 232 } 233 } 234 #ifdef DEBUG 235 __CTRACE("makenew: nc = %d\n", nc); 236 #endif 237 win->cury = win->curx = 0; 238 win->maxy = nl; 239 win->maxx = nc; 240 241 win->begy = by; 242 win->begx = bx; 243 win->flags = 0; 244 win->delay = -1; 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 14:09:52 GMT 2025