Annotation of src/lib/libcurses/newwin.c, Revision 1.29
1.29 ! blymn 1: /* $NetBSD: newwin.c,v 1.28 2002/01/02 10:38:28 blymn Exp $ */
1.8 mikel 2:
1.1 cgd 3: /*
1.7 cgd 4: * Copyright (c) 1981, 1993, 1994
1.5 cgd 5: * The Regents of the University of California. All rights reserved.
1.1 cgd 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:
1.8 mikel 36: #include <sys/cdefs.h>
1.1 cgd 37: #ifndef lint
1.8 mikel 38: #if 0
1.7 cgd 39: static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94";
1.8 mikel 40: #else
1.29 ! blymn 41: __RCSID("$NetBSD: newwin.c,v 1.28 2002/01/02 10:38:28 blymn Exp $");
1.8 mikel 42: #endif
1.10 mrg 43: #endif /* not lint */
1.1 cgd 44:
1.4 mycroft 45: #include <stdlib.h>
1.1 cgd 46:
1.7 cgd 47: #include "curses.h"
1.13 blymn 48: #include "curses_private.h"
1.7 cgd 49:
1.15 jdc 50: extern struct __winlist *winlistp;
51:
1.26 blymn 52: static WINDOW *__makenew(SCREEN *screen, int nlines, int ncols, int by,
53: int bx, int sub);
1.20 blymn 54:
55: /*
56: * derwin --
57: * Create a new window in the same manner as subwin but (by, bx)
58: * are relative to the origin of window orig instead of absolute.
59: */
60: WINDOW *
61: derwin(WINDOW *orig, int nlines, int ncols, int by, int bx)
62: {
63: if (orig == NULL)
64: return ERR;
1.28 blymn 65:
1.20 blymn 66: return subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx);
67: }
1.5 cgd 68:
1.22 blymn 69: /*
70: * dupwin --
71: * Create a copy of the given window.
72: */
73: WINDOW *
74: dupwin(WINDOW *win)
75: {
76: WINDOW *new_one;
77:
78: if ((new_one =
79: newwin(win->maxy, win->maxx, win->begy, win->begx)) == NULL)
80: return NULL;
81:
82: overwrite(win, new_one);
83: return new_one;
84: }
85:
1.28 blymn 86:
1.4 mycroft 87: /*
88: * newwin --
89: * Allocate space for and set up defaults for a new window.
90: */
1.1 cgd 91: WINDOW *
1.19 blymn 92: newwin(int nlines, int ncols, int by, int bx)
1.1 cgd 93: {
1.26 blymn 94: return __newwin(_cursesi_screen, nlines, ncols, by, bx);
95: }
96:
97: WINDOW *
98: __newwin(SCREEN *screen, int nlines, int ncols, int by, int bx)
99: {
1.9 perry 100: WINDOW *win;
101: __LINE *lp;
1.10 mrg 102: int i, j;
1.9 perry 103: __LDATA *sp;
1.1 cgd 104:
1.19 blymn 105: if (nlines == 0)
106: nlines = LINES - by;
107: if (ncols == 0)
108: ncols = COLS - bx;
1.5 cgd 109:
1.26 blymn 110: if ((win = __makenew(screen, nlines, ncols, by, bx, 0)) == NULL)
1.4 mycroft 111: return (NULL);
1.5 cgd 112:
113: win->nextp = win;
114: win->ch_off = 0;
115: win->orig = NULL;
116:
117: #ifdef DEBUG
118: __CTRACE("newwin: win->ch_off = %d\n", win->ch_off);
119: #endif
120:
1.19 blymn 121: for (i = 0; i < nlines; i++) {
1.5 cgd 122: lp = win->lines[i];
123: lp->flags = 0;
1.19 blymn 124: for (sp = lp->line, j = 0; j < ncols; j++, sp++) {
1.5 cgd 125: sp->ch = ' ';
1.21 jdc 126: sp->bch = ' ';
1.5 cgd 127: sp->attr = 0;
1.21 jdc 128: sp->battr = 0;
1.5 cgd 129: }
1.12 christos 130: lp->hash = __hash((char *)(void *)lp->line,
1.19 blymn 131: (int) (ncols * __LDATASIZE));
1.1 cgd 132: }
1.4 mycroft 133: return (win);
1.1 cgd 134: }
135:
136: WINDOW *
1.19 blymn 137: subwin(WINDOW *orig, int nlines, int ncols, int by, int bx)
1.1 cgd 138: {
1.10 mrg 139: int i;
1.5 cgd 140: __LINE *lp;
1.9 perry 141: WINDOW *win;
1.1 cgd 142:
1.4 mycroft 143: /* Make sure window fits inside the original one. */
144: #ifdef DEBUG
1.19 blymn 145: __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nlines, ncols, by, bx);
1.4 mycroft 146: #endif
1.5 cgd 147: if (by < orig->begy || bx < orig->begx
1.19 blymn 148: || by + nlines > orig->maxy + orig->begy
149: || bx + ncols > orig->maxx + orig->begx)
1.4 mycroft 150: return (NULL);
1.19 blymn 151: if (nlines == 0)
152: nlines = orig->maxy + orig->begy - by;
153: if (ncols == 0)
154: ncols = orig->maxx + orig->begx - bx;
1.26 blymn 155: if ((win = __makenew(_cursesi_screen, nlines, ncols,
156: by, bx, 1)) == NULL)
1.4 mycroft 157: return (NULL);
1.5 cgd 158: win->nextp = orig->nextp;
159: orig->nextp = win;
160: win->orig = orig;
161:
162: /* Initialize flags here so that refresh can also use __set_subwin. */
163: for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++)
164: lp->flags = 0;
1.4 mycroft 165: __set_subwin(orig, win);
166: return (win);
1.1 cgd 167: }
168: /*
1.4 mycroft 169: * This code is shared with mvwin().
1.1 cgd 170: */
1.4 mycroft 171: void
1.16 blymn 172: __set_subwin(WINDOW *orig, WINDOW *win)
1.1 cgd 173: {
1.10 mrg 174: int i;
1.5 cgd 175: __LINE *lp, *olp;
176:
177: win->ch_off = win->begx - orig->begx;
1.10 mrg 178: /* Point line pointers to line space. */
1.5 cgd 179: for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) {
180: win->lines[i] = lp;
1.11 mycroft 181: olp = orig->lines[i + win->begy - orig->begy];
1.29 ! blymn 182: #ifdef DEBUG
! 183: lp->sentinel = SENTINEL_VALUE;
! 184: #endif
1.18 mycroft 185: lp->line = &olp->line[win->ch_off];
1.5 cgd 186: lp->firstchp = &olp->firstch;
187: lp->lastchp = &olp->lastch;
1.12 christos 188: lp->hash = __hash((char *)(void *)lp->line,
189: (int) (win->maxx * __LDATASIZE));
1.5 cgd 190: }
1.1 cgd 191:
1.4 mycroft 192: #ifdef DEBUG
1.5 cgd 193: __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off);
1.4 mycroft 194: #endif
1.1 cgd 195: }
196: /*
1.5 cgd 197: * __makenew --
1.4 mycroft 198: * Set up a window buffer and returns a pointer to it.
1.1 cgd 199: */
200: static WINDOW *
1.26 blymn 201: __makenew(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub)
1.4 mycroft 202: {
1.15 jdc 203: WINDOW *win;
204: __LINE *lp;
205: struct __winlist *wlp, *wlp2;
206: int i;
1.10 mrg 207:
1.1 cgd 208:
1.4 mycroft 209: #ifdef DEBUG
1.19 blymn 210: __CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx);
1.4 mycroft 211: #endif
1.27 blymn 212: if ((win = malloc(sizeof(WINDOW))) == NULL)
1.4 mycroft 213: return (NULL);
214: #ifdef DEBUG
1.19 blymn 215: __CTRACE("makenew: nlines = %d\n", nlines);
1.4 mycroft 216: #endif
1.5 cgd 217:
1.10 mrg 218: /* Set up line pointer array and line space. */
1.19 blymn 219: if ((win->lines = malloc(nlines * sizeof(__LINE *))) == NULL) {
1.1 cgd 220: free(win);
1.5 cgd 221: return NULL;
222: }
1.19 blymn 223: if ((win->lspace = malloc(nlines * sizeof(__LINE))) == NULL) {
1.10 mrg 224: free(win);
225: free(win->lines);
1.5 cgd 226: return NULL;
227: }
228: /* Don't allocate window and line space if it's a subwindow */
229: if (!sub) {
230: /*
231: * Allocate window space in one chunk.
232: */
1.10 mrg 233: if ((win->wspace =
1.19 blymn 234: malloc(ncols * nlines * sizeof(__LDATA))) == NULL) {
1.5 cgd 235: free(win->lines);
236: free(win->lspace);
237: free(win);
238: return NULL;
1.15 jdc 239: }
240: /*
241: * Append window to window list.
242: */
243: if ((wlp = malloc(sizeof(struct __winlist))) == NULL) {
244: free(win->wspace);
245: free(win->lines);
246: free(win->lspace);
247: free(win);
248: return NULL;
249: }
250: wlp->winp = win;
251: wlp->nextp = NULL;
1.26 blymn 252: if (screen->winlistp == NULL)
253: screen->winlistp = wlp;
1.15 jdc 254: else {
1.26 blymn 255: wlp2 = screen->winlistp;
1.15 jdc 256: while (wlp2->nextp != NULL)
257: wlp2 = wlp2->nextp;
258: wlp2->nextp = wlp;
1.5 cgd 259: }
260: /*
261: * Point line pointers to line space, and lines themselves into
262: * window space.
263: */
1.19 blymn 264: for (lp = win->lspace, i = 0; i < nlines; i++, lp++) {
1.5 cgd 265: win->lines[i] = lp;
1.19 blymn 266: lp->line = &win->wspace[i * ncols];
1.29 ! blymn 267: #ifdef DEBUG
! 268: lp->sentinel = SENTINEL_VALUE;
! 269: #endif
1.5 cgd 270: lp->firstchp = &lp->firstch;
271: lp->lastchp = &lp->lastch;
272: lp->firstch = 0;
273: lp->lastch = 0;
274: }
1.1 cgd 275: }
1.4 mycroft 276: #ifdef DEBUG
1.19 blymn 277: __CTRACE("makenew: ncols = %d\n", ncols);
1.4 mycroft 278: #endif
1.5 cgd 279: win->cury = win->curx = 0;
1.19 blymn 280: win->maxy = nlines;
281: win->maxx = ncols;
1.5 cgd 282:
283: win->begy = by;
284: win->begx = bx;
1.29 ! blymn 285: win->flags = (__IDLINE | __IDCHAR);
1.17 jdc 286: win->delay = -1;
1.13 blymn 287: win->wattr = 0;
1.21 jdc 288: win->bch = ' ';
1.14 jdc 289: win->battr = 0;
1.25 jdc 290: win->scr_t = 0;
1.24 jdc 291: win->scr_b = win->maxy - 1;
1.4 mycroft 292: __swflags(win);
293: #ifdef DEBUG
1.13 blymn 294: __CTRACE("makenew: win->wattr = %0.2o\n", win->wattr);
1.5 cgd 295: __CTRACE("makenew: win->flags = %0.2o\n", win->flags);
296: __CTRACE("makenew: win->maxy = %d\n", win->maxy);
297: __CTRACE("makenew: win->maxx = %d\n", win->maxx);
298: __CTRACE("makenew: win->begy = %d\n", win->begy);
299: __CTRACE("makenew: win->begx = %d\n", win->begx);
1.24 jdc 300: __CTRACE("makenew: win->scr_t = %d\n", win->scr_t);
301: __CTRACE("makenew: win->scr_b = %d\n", win->scr_b);
1.4 mycroft 302: #endif
303: return (win);
1.1 cgd 304: }
305:
1.4 mycroft 306: void
1.16 blymn 307: __swflags(WINDOW *win)
1.1 cgd 308: {
1.7 cgd 309: win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK);
1.5 cgd 310: if (win->begx + win->maxx == COLS) {
311: win->flags |= __ENDLINE;
1.7 cgd 312: if (win->begx == 0 && win->maxy == LINES && win->begy == 0)
313: win->flags |= __FULLWIN;
1.5 cgd 314: if (win->begy + win->maxy == LINES)
315: win->flags |= __SCROLLWIN;
1.1 cgd 316: }
317: }
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