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- /*
- * Copyright (c) 1981, 1993, 1994
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94";
- #endif /* not lint */
-
- #include <stdlib.h>
-
- #include "curses.h"
-
- #undef nl /* Don't need it here, and it interferes. */
-
- static WINDOW *__makenew __P((int, int, int, int, int));
-
- void __set_subwin __P((WINDOW *, WINDOW *));
-
- /*
- * newwin --
- * Allocate space for and set up defaults for a new window.
- */
- WINDOW *
- newwin(nl, nc, by, bx)
- register int nl, nc, by, bx;
- {
- register WINDOW *win;
- register __LINE *lp;
- register int i, j;
- register __LDATA *sp;
-
- if (nl == 0)
- nl = LINES - by;
- if (nc == 0)
- nc = COLS - bx;
-
- if ((win = __makenew(nl, nc, by, bx, 0)) == NULL)
- return (NULL);
-
- win->nextp = win;
- win->ch_off = 0;
- win->orig = NULL;
-
- #ifdef DEBUG
- __CTRACE("newwin: win->ch_off = %d\n", win->ch_off);
- #endif
-
- for (i = 0; i < nl; i++) {
- lp = win->lines[i];
- lp->flags = 0;
- for (sp = lp->line, j = 0; j < nc; j++, sp++) {
- sp->ch = ' ';
- sp->attr = 0;
- }
- lp->hash = __hash((char *) lp->line, nc * __LDATASIZE);
- }
- return (win);
- }
-
- WINDOW *
- subwin(orig, nl, nc, by, bx)
- register WINDOW *orig;
- register int by, bx, nl, nc;
- {
- int i;
- __LINE *lp;
- register WINDOW *win;
-
- /* Make sure window fits inside the original one. */
- #ifdef DEBUG
- __CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx);
- #endif
- if (by < orig->begy || bx < orig->begx
- || by + nl > orig->maxy + orig->begy
- || bx + nc > orig->maxx + orig->begx)
- return (NULL);
- if (nl == 0)
- nl = orig->maxy + orig->begy - by;
- if (nc == 0)
- nc = orig->maxx + orig->begx - bx;
- if ((win = __makenew(nl, nc, by, bx, 1)) == NULL)
- return (NULL);
- win->nextp = orig->nextp;
- orig->nextp = win;
- win->orig = orig;
-
- /* Initialize flags here so that refresh can also use __set_subwin. */
- for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++)
- lp->flags = 0;
- __set_subwin(orig, win);
- return (win);
- }
-
- /*
- * This code is shared with mvwin().
- */
- void
- __set_subwin(orig, win)
- register WINDOW *orig, *win;
- {
- int i;
- __LINE *lp, *olp;
-
- win->ch_off = win->begx - orig->begx;
- /* Point line pointers to line space. */
- for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) {
- win->lines[i] = lp;
- olp = orig->lines[i + win->begy - orig->begy];
- lp->line = &olp->line[win->ch_off];
- lp->firstchp = &olp->firstch;
- lp->lastchp = &olp->lastch;
- lp->hash = __hash((char *) lp->line, win->maxx * __LDATASIZE);
- }
-
- #ifdef DEBUG
- __CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off);
- #endif
- }
-
- /*
- * __makenew --
- * Set up a window buffer and returns a pointer to it.
- */
- static WINDOW *
- __makenew(nl, nc, by, bx, sub)
- register int by, bx, nl, nc;
- int sub;
- {
- register WINDOW *win;
- register __LINE *lp;
- int i;
-
-
- #ifdef DEBUG
- __CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx);
- #endif
- if ((win = malloc(sizeof(*win))) == NULL)
- return (NULL);
- #ifdef DEBUG
- __CTRACE("makenew: nl = %d\n", nl);
- #endif
-
- /*
- * Set up line pointer array and line space.
- */
- if ((win->lines = malloc (nl * sizeof(__LINE *))) == NULL) {
- free(win);
- return NULL;
- }
- if ((win->lspace = malloc (nl * sizeof(__LINE))) == NULL) {
- free (win);
- free (win->lines);
- return NULL;
- }
-
- /* Don't allocate window and line space if it's a subwindow */
- if (!sub) {
- /*
- * Allocate window space in one chunk.
- */
- if ((win->wspace =
- malloc(nc * nl * sizeof(__LDATA))) == NULL) {
- free(win->lines);
- free(win->lspace);
- free(win);
- return NULL;
- }
-
- /*
- * Point line pointers to line space, and lines themselves into
- * window space.
- */
- for (lp = win->lspace, i = 0; i < nl; i++, lp++) {
- win->lines[i] = lp;
- lp->line = &win->wspace[i * nc];
- lp->firstchp = &lp->firstch;
- lp->lastchp = &lp->lastch;
- lp->firstch = 0;
- lp->lastch = 0;
- }
- }
- #ifdef DEBUG
- __CTRACE("makenew: nc = %d\n", nc);
- #endif
- win->cury = win->curx = 0;
- win->maxy = nl;
- win->maxx = nc;
-
- win->begy = by;
- win->begx = bx;
- win->flags = 0;
- __swflags(win);
- #ifdef DEBUG
- __CTRACE("makenew: win->flags = %0.2o\n", win->flags);
- __CTRACE("makenew: win->maxy = %d\n", win->maxy);
- __CTRACE("makenew: win->maxx = %d\n", win->maxx);
- __CTRACE("makenew: win->begy = %d\n", win->begy);
- __CTRACE("makenew: win->begx = %d\n", win->begx);
- #endif
- return (win);
- }
-
- void
- __swflags(win)
- register WINDOW *win;
- {
- win->flags &= ~(__ENDLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK);
- if (win->begx + win->maxx == COLS) {
- win->flags |= __ENDLINE;
- if (win->begx == 0 && win->maxy == LINES && win->begy == 0)
- win->flags |= __FULLWIN;
- if (win->begy + win->maxy == LINES)
- win->flags |= __SCROLLWIN;
- }
- }
-