newwin.c revision 1.9
1 /* $NetBSD: newwin.c,v 1.9 1998/02/03 19:12:30 perry 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 1.9 1998/02/03 19:12:30 perry Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 #include <stdlib.h> 46 47 #include "curses.h" 48 49 #undef nl /* Don't need it here, and it interferes. */ 50 51 static WINDOW *__makenew __P((int, int, int, int, int)); 52 53 void __set_subwin __P((WINDOW *, WINDOW *)); 54 55 /* 56 * newwin -- 57 * Allocate space for and set up defaults for a new window. 58 */ 59 WINDOW * 60 newwin(nl, nc, by, bx) 61 int nl, nc, by, bx; 62 { 63 WINDOW *win; 64 __LINE *lp; 65 int i, j; 66 __LDATA *sp; 67 68 if (nl == 0) 69 nl = LINES - by; 70 if (nc == 0) 71 nc = COLS - bx; 72 73 if ((win = __makenew(nl, nc, by, bx, 0)) == NULL) 74 return (NULL); 75 76 win->nextp = win; 77 win->ch_off = 0; 78 win->orig = NULL; 79 80 #ifdef DEBUG 81 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 82 #endif 83 84 for (i = 0; i < nl; i++) { 85 lp = win->lines[i]; 86 lp->flags = 0; 87 for (sp = lp->line, j = 0; j < nc; j++, sp++) { 88 sp->ch = ' '; 89 sp->attr = 0; 90 } 91 lp->hash = __hash((char *) lp->line, nc * __LDATASIZE); 92 } 93 return (win); 94 } 95 96 WINDOW * 97 subwin(orig, nl, nc, by, bx) 98 WINDOW *orig; 99 int by, bx, nl, nc; 100 { 101 int i; 102 __LINE *lp; 103 WINDOW *win; 104 105 /* Make sure window fits inside the original one. */ 106 #ifdef DEBUG 107 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx); 108 #endif 109 if (by < orig->begy || bx < orig->begx 110 || by + nl > orig->maxy + orig->begy 111 || bx + nc > orig->maxx + orig->begx) 112 return (NULL); 113 if (nl == 0) 114 nl = orig->maxy + orig->begy - by; 115 if (nc == 0) 116 nc = orig->maxx + orig->begx - bx; 117 if ((win = __makenew(nl, nc, by, bx, 1)) == NULL) 118 return (NULL); 119 win->nextp = orig->nextp; 120 orig->nextp = win; 121 win->orig = orig; 122 123 /* Initialize flags here so that refresh can also use __set_subwin. */ 124 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 125 lp->flags = 0; 126 __set_subwin(orig, win); 127 return (win); 128 } 129 130 /* 131 * This code is shared with mvwin(). 132 */ 133 void 134 __set_subwin(orig, win) 135 WINDOW *orig, *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]; 145 lp->line = &olp->line[win->begx]; 146 lp->firstchp = &olp->firstch; 147 lp->lastchp = &olp->lastch; 148 lp->hash = __hash((char *) lp->line, 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 /* 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 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 /* 180 * Set up line pointer array and line space. 181 */ 182 if ((win->lines = malloc (nl * sizeof(__LINE *))) == NULL) { 183 free(win); 184 return NULL; 185 } 186 if ((win->lspace = malloc (nl * sizeof(__LINE))) == NULL) { 187 free (win); 188 free (win->lines); 189 return NULL; 190 } 191 192 /* Don't allocate window and line space if it's a subwindow */ 193 if (!sub) { 194 /* 195 * Allocate window space in one chunk. 196 */ 197 if ((win->wspace = 198 malloc(nc * nl * sizeof(__LDATA))) == NULL) { 199 free(win->lines); 200 free(win->lspace); 201 free(win); 202 return NULL; 203 } 204 205 /* 206 * Point line pointers to line space, and lines themselves into 207 * window space. 208 */ 209 for (lp = win->lspace, i = 0; i < nl; i++, lp++) { 210 win->lines[i] = lp; 211 lp->line = &win->wspace[i * nc]; 212 lp->firstchp = &lp->firstch; 213 lp->lastchp = &lp->lastch; 214 lp->firstch = 0; 215 lp->lastch = 0; 216 } 217 } 218 #ifdef DEBUG 219 __CTRACE("makenew: nc = %d\n", nc); 220 #endif 221 win->cury = win->curx = 0; 222 win->maxy = nl; 223 win->maxx = nc; 224 225 win->begy = by; 226 win->begx = bx; 227 win->flags = 0; 228 __swflags(win); 229 #ifdef DEBUG 230 __CTRACE("makenew: win->flags = %0.2o\n", win->flags); 231 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 232 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 233 __CTRACE("makenew: win->begy = %d\n", win->begy); 234 __CTRACE("makenew: win->begx = %d\n", win->begx); 235 #endif 236 return (win); 237 } 238 239 void 240 __swflags(win) 241 WINDOW *win; 242 { 243 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 244 if (win->begx + win->maxx == COLS) { 245 win->flags |= __ENDLINE; 246 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 247 win->flags |= __FULLWIN; 248 if (win->begy + win->maxy == LINES) 249 win->flags |= __SCROLLWIN; 250 } 251 } 252
Indexes created Mon Sep 22 05:09:51 GMT 2025