newwin.c revision 1.13
1 /* $NetBSD: newwin.c,v 1.13 2000/04/11 13:57:10 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 1.13 2000/04/11 13:57:10 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 static WINDOW *__makenew __P((int, int, int, int, int)); 53 54 void __set_subwin __P((WINDOW *, WINDOW *)); 55 56 /* 57 * newwin -- 58 * Allocate space for and set up defaults for a new window. 59 */ 60 WINDOW * 61 newwin(nl, nc, by, bx) 62 int nl, nc, by, bx; 63 { 64 WINDOW *win; 65 __LINE *lp; 66 int i, j; 67 __LDATA *sp; 68 69 if (nl == 0) 70 nl = LINES - by; 71 if (nc == 0) 72 nc = COLS - bx; 73 74 if ((win = __makenew(nl, nc, by, bx, 0)) == NULL) 75 return (NULL); 76 77 win->nextp = win; 78 win->ch_off = 0; 79 win->orig = NULL; 80 win->delay = -1; 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(orig, nl, nc, by, bx) 101 WINDOW *orig; 102 int by, bx, nl, nc; 103 { 104 int i; 105 __LINE *lp; 106 WINDOW *win; 107 108 /* Make sure window fits inside the original one. */ 109 #ifdef DEBUG 110 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx); 111 #endif 112 if (by < orig->begy || bx < orig->begx 113 || by + nl > orig->maxy + orig->begy 114 || bx + nc > orig->maxx + orig->begx) 115 return (NULL); 116 if (nl == 0) 117 nl = orig->maxy + orig->begy - by; 118 if (nc == 0) 119 nc = orig->maxx + orig->begx - bx; 120 if ((win = __makenew(nl, nc, by, bx, 1)) == NULL) 121 return (NULL); 122 win->nextp = orig->nextp; 123 orig->nextp = win; 124 win->orig = orig; 125 126 /* Initialize flags here so that refresh can also use __set_subwin. */ 127 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 128 lp->flags = 0; 129 __set_subwin(orig, win); 130 return (win); 131 } 132 /* 133 * This code is shared with mvwin(). 134 */ 135 void 136 __set_subwin(orig, win) 137 WINDOW *orig, *win; 138 { 139 int i; 140 __LINE *lp, *olp; 141 142 win->ch_off = win->begx - orig->begx; 143 /* Point line pointers to line space. */ 144 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 145 win->lines[i] = lp; 146 olp = orig->lines[i + win->begy - orig->begy]; 147 lp->line = &olp->line[win->begx - orig->begx]; 148 lp->firstchp = &olp->firstch; 149 lp->lastchp = &olp->lastch; 150 lp->hash = __hash((char *)(void *)lp->line, 151 (int) (win->maxx * __LDATASIZE)); 152 } 153 154 #ifdef DEBUG 155 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 156 #endif 157 } 158 /* 159 * __makenew -- 160 * Set up a window buffer and returns a pointer to it. 161 */ 162 static WINDOW * 163 __makenew(nl, nc, by, bx, sub) 164 int by, bx, nl, nc; 165 int sub; 166 { 167 WINDOW *win; 168 __LINE *lp; 169 int i; 170 171 172 #ifdef DEBUG 173 __CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx); 174 #endif 175 if ((win = malloc(sizeof(*win))) == NULL) 176 return (NULL); 177 #ifdef DEBUG 178 __CTRACE("makenew: nl = %d\n", nl); 179 #endif 180 181 /* Set up line pointer array and line space. */ 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 /* Don't allocate window and line space if it's a subwindow */ 192 if (!sub) { 193 /* 194 * Allocate window space in one chunk. 195 */ 196 if ((win->wspace = 197 malloc(nc * nl * sizeof(__LDATA))) == NULL) { 198 free(win->lines); 199 free(win->lspace); 200 free(win); 201 return NULL; 202 } 203 /* 204 * Point line pointers to line space, and lines themselves into 205 * window space. 206 */ 207 for (lp = win->lspace, i = 0; i < nl; i++, lp++) { 208 win->lines[i] = lp; 209 lp->line = &win->wspace[i * nc]; 210 lp->firstchp = &lp->firstch; 211 lp->lastchp = &lp->lastch; 212 lp->firstch = 0; 213 lp->lastch = 0; 214 } 215 } 216 #ifdef DEBUG 217 __CTRACE("makenew: nc = %d\n", nc); 218 #endif 219 win->cury = win->curx = 0; 220 win->maxy = nl; 221 win->maxx = nc; 222 223 win->begy = by; 224 win->begx = bx; 225 win->flags = 0; 226 win->wattr = 0; 227 __swflags(win); 228 #ifdef DEBUG 229 __CTRACE("makenew: win->wattr = %0.2o\n", win->wattr); 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 Sun Sep 21 20:09:37 GMT 2025