1 /* $NetBSD: newwin.c,v 1.22 2000/04/20 13:12:14 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 1.22 2000/04/20 13:12:14 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 extern struct __winlist *winlistp; 51 52 static WINDOW *__makenew(int nlines, int ncols, int by, int bx, int sub); 53 54 void __set_subwin(WINDOW *orig, WINDOW *win); 55 56 /* 57 * derwin -- 58 * Create a new window in the same manner as subwin but (by, bx) 59 * are relative to the origin of window orig instead of absolute. 60 */ 61 WINDOW * 62 derwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 63 { 64 if (orig == NULL) 65 return ERR; 66 67 return subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx); 68 } 69 70 /* 71 * dupwin -- 72 * Create a copy of the given window. 73 */ 74 WINDOW * 75 dupwin(WINDOW *win) 76 { 77 WINDOW *new_one; 78 79 if ((new_one = 80 newwin(win->maxy, win->maxx, win->begy, win->begx)) == NULL) 81 return NULL; 82 83 overwrite(win, new_one); 84 return new_one; 85 } 86 87 88 /* 89 * newwin -- 90 * Allocate space for and set up defaults for a new window. 91 */ 92 WINDOW * 93 newwin(int nlines, int ncols, int by, int bx) 94 { 95 WINDOW *win; 96 __LINE *lp; 97 int i, j; 98 __LDATA *sp; 99 100 if (nlines == 0) 101 nlines = LINES - by; 102 if (ncols == 0) 103 ncols = COLS - bx; 104 105 if ((win = __makenew(nlines, ncols, by, bx, 0)) == NULL) 106 return (NULL); 107 108 win->nextp = win; 109 win->ch_off = 0; 110 win->orig = NULL; 111 112 #ifdef DEBUG 113 __CTRACE("newwin: win->ch_off = %d\n", win->ch_off); 114 #endif 115 116 for (i = 0; i < nlines; i++) { 117 lp = win->lines[i]; 118 lp->flags = 0; 119 for (sp = lp->line, j = 0; j < ncols; j++, sp++) { 120 sp->ch = ' '; 121 sp->bch = ' '; 122 sp->attr = 0; 123 sp->battr = 0; 124 } 125 lp->hash = __hash((char *)(void *)lp->line, 126 (int) (ncols * __LDATASIZE)); 127 } 128 return (win); 129 } 130 131 WINDOW * 132 subwin(WINDOW *orig, int nlines, int ncols, int by, int bx) 133 { 134 int i; 135 __LINE *lp; 136 WINDOW *win; 137 138 /* Make sure window fits inside the original one. */ 139 #ifdef DEBUG 140 __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nlines, ncols, by, bx); 141 #endif 142 if (by < orig->begy || bx < orig->begx 143 || by + nlines > orig->maxy + orig->begy 144 || bx + ncols > orig->maxx + orig->begx) 145 return (NULL); 146 if (nlines == 0) 147 nlines = orig->maxy + orig->begy - by; 148 if (ncols == 0) 149 ncols = orig->maxx + orig->begx - bx; 150 if ((win = __makenew(nlines, ncols, by, bx, 1)) == NULL) 151 return (NULL); 152 win->nextp = orig->nextp; 153 orig->nextp = win; 154 win->orig = orig; 155 156 /* Initialize flags here so that refresh can also use __set_subwin. */ 157 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) 158 lp->flags = 0; 159 __set_subwin(orig, win); 160 return (win); 161 } 162 /* 163 * This code is shared with mvwin(). 164 */ 165 void 166 __set_subwin(WINDOW *orig, WINDOW *win) 167 { 168 int i; 169 __LINE *lp, *olp; 170 171 win->ch_off = win->begx - orig->begx; 172 /* Point line pointers to line space. */ 173 for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) { 174 win->lines[i] = lp; 175 olp = orig->lines[i + win->begy - orig->begy]; 176 lp->line = &olp->line[win->ch_off]; 177 lp->firstchp = &olp->firstch; 178 lp->lastchp = &olp->lastch; 179 lp->hash = __hash((char *)(void *)lp->line, 180 (int) (win->maxx * __LDATASIZE)); 181 } 182 183 #ifdef DEBUG 184 __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off); 185 #endif 186 } 187 /* 188 * __makenew -- 189 * Set up a window buffer and returns a pointer to it. 190 */ 191 static WINDOW * 192 __makenew(int nlines, int ncols, int by, int bx, int sub) 193 { 194 WINDOW *win; 195 __LINE *lp; 196 struct __winlist *wlp, *wlp2; 197 int i; 198 199 200 #ifdef DEBUG 201 __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx); 202 #endif 203 if ((win = malloc(sizeof(*win))) == NULL) 204 return (NULL); 205 #ifdef DEBUG 206 __CTRACE("makenew: nlines = %d\n", nlines); 207 #endif 208 209 /* Set up line pointer array and line space. */ 210 if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) { 211 free(win); 212 return NULL; 213 } 214 if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) { 215 free(win); 216 free(win->lines); 217 return NULL; 218 } 219 /* Don't allocate window and line space if it's a subwindow */ 220 if (!sub) { 221 /* 222 * Allocate window space in one chunk. 223 */ 224 if ((win->wspace = 225 malloc(ncols * nlines * sizeof(__LDATA))) == NULL) { 226 free(win->lines); 227 free(win->lspace); 228 free(win); 229 return NULL; 230 } 231 /* 232 * Append window to window list. 233 */ 234 if ((wlp = malloc(sizeof(struct __winlist))) == NULL) { 235 free(win->wspace); 236 free(win->lines); 237 free(win->lspace); 238 free(win); 239 return NULL; 240 } 241 wlp->winp = win; 242 wlp->nextp = NULL; 243 if (__winlistp == NULL) 244 __winlistp = wlp; 245 else { 246 wlp2 = __winlistp; 247 while (wlp2->nextp != NULL) 248 wlp2 = wlp2->nextp; 249 wlp2->nextp = wlp; 250 } 251 /* 252 * Point line pointers to line space, and lines themselves into 253 * window space. 254 */ 255 for (lp = win->lspace, i = 0; i < nlines; i++, lp++) { 256 win->lines[i] = lp; 257 lp->line = &win->wspace[i * ncols]; 258 lp->firstchp = &lp->firstch; 259 lp->lastchp = &lp->lastch; 260 lp->firstch = 0; 261 lp->lastch = 0; 262 } 263 } 264 #ifdef DEBUG 265 __CTRACE("makenew: ncols = %d\n", ncols); 266 #endif 267 win->cury = win->curx = 0; 268 win->maxy = nlines; 269 win->maxx = ncols; 270 271 win->begy = by; 272 win->begx = bx; 273 win->flags = 0; 274 win->delay = -1; 275 win->wattr = 0; 276 win->bch = ' '; 277 win->battr = 0; 278 __swflags(win); 279 #ifdef DEBUG 280 __CTRACE("makenew: win->wattr = %0.2o\n", win->wattr); 281 __CTRACE("makenew: win->flags = %0.2o\n", win->flags); 282 __CTRACE("makenew: win->maxy = %d\n", win->maxy); 283 __CTRACE("makenew: win->maxx = %d\n", win->maxx); 284 __CTRACE("makenew: win->begy = %d\n", win->begy); 285 __CTRACE("makenew: win->begx = %d\n", win->begx); 286 #endif 287 return (win); 288 } 289 290 void 291 __swflags(WINDOW *win) 292 { 293 win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK); 294 if (win->begx + win->maxx == COLS) { 295 win->flags |= __ENDLINE; 296 if (win->begx == 0 && win->maxy == LINES && win->begy == 0) 297 win->flags |= __FULLWIN; 298 if (win->begy + win->maxy == LINES) 299 win->flags |= __SCROLLWIN; 300 } 301 } 302