249 lines
6.3 KiB
C
249 lines
6.3 KiB
C
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/*
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* Copyright (c) 1981, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)newwin.c 8.1 (Berkeley) 7/20/93";
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#endif /* not lint */
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#include <curses.h>
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#include <stdlib.h>
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#undef nl /* Don't need it here, and it interferes. */
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static WINDOW *__makenew __P((int, int, int, int, int));
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void __set_subwin __P((WINDOW *, WINDOW *));
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/*
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* newwin --
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* Allocate space for and set up defaults for a new window.
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*/
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WINDOW *
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newwin(nl, nc, by, bx)
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register int nl, nc, by, bx;
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{
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register WINDOW *win;
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register __LINE *lp;
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register int i, j;
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register __LDATA *sp;
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if (nl == 0)
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nl = LINES - by;
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if (nc == 0)
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nc = COLS - bx;
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if ((win = __makenew(nl, nc, by, bx, 0)) == NULL)
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return (NULL);
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win->nextp = win;
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win->ch_off = 0;
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win->orig = NULL;
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#ifdef DEBUG
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__CTRACE("newwin: win->ch_off = %d\n", win->ch_off);
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#endif
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for (i = 0; i < nl; i++) {
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lp = win->lines[i];
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lp->flags = 0;
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for (sp = lp->line, j = 0; j < nc; j++, sp++) {
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sp->ch = ' ';
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sp->attr = 0;
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}
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lp->hash = __hash((char *) lp->line, nc * __LDATASIZE);
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}
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return (win);
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}
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WINDOW *
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subwin(orig, nl, nc, by, bx)
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register WINDOW *orig;
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register int by, bx, nl, nc;
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{
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int i;
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__LINE *lp;
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register WINDOW *win;
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/* Make sure window fits inside the original one. */
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#ifdef DEBUG
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__CTRACE("subwin: (%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx);
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#endif
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if (by < orig->begy || bx < orig->begx
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|| by + nl > orig->maxy + orig->begy
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|| bx + nc > orig->maxx + orig->begx)
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return (NULL);
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if (nl == 0)
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nl = orig->maxy + orig->begy - by;
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if (nc == 0)
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nc = orig->maxx + orig->begx - bx;
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if ((win = __makenew(nl, nc, by, bx, 1)) == NULL)
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return (NULL);
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win->nextp = orig->nextp;
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orig->nextp = win;
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win->orig = orig;
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/* Initialize flags here so that refresh can also use __set_subwin. */
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for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++)
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lp->flags = 0;
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__set_subwin(orig, win);
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return (win);
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}
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/*
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* This code is shared with mvwin().
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*/
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void
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__set_subwin(orig, win)
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register WINDOW *orig, *win;
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{
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int i;
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__LINE *lp, *olp;
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win->ch_off = win->begx - orig->begx;
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/* Point line pointers to line space. */
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for (lp = win->lspace, i = 0; i < win->maxy; i++, lp++) {
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win->lines[i] = lp;
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olp = orig->lines[i + win->begy];
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lp->line = &olp->line[win->begx];
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lp->firstchp = &olp->firstch;
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lp->lastchp = &olp->lastch;
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lp->hash = __hash((char *) lp->line, win->maxx * __LDATASIZE);
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}
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#ifdef DEBUG
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__CTRACE("__set_subwin: win->ch_off = %d\n", win->ch_off);
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#endif
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}
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/*
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* __makenew --
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* Set up a window buffer and returns a pointer to it.
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*/
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static WINDOW *
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__makenew(nl, nc, by, bx, sub)
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register int by, bx, nl, nc;
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int sub;
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{
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register WINDOW *win;
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register __LINE *lp;
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int i;
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#ifdef DEBUG
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__CTRACE("makenew: (%d, %d, %d, %d)\n", nl, nc, by, bx);
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#endif
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if ((win = malloc(sizeof(*win))) == NULL)
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return (NULL);
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#ifdef DEBUG
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__CTRACE("makenew: nl = %d\n", nl);
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#endif
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/*
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* Set up line pointer array and line space.
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*/
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if ((win->lines = malloc (nl * sizeof(__LINE *))) == NULL) {
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free(win);
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return NULL;
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}
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if ((win->lspace = malloc (nl * sizeof(__LINE))) == NULL) {
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free (win);
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free (win->lines);
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return NULL;
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}
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/* Don't allocate window and line space if it's a subwindow */
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if (!sub) {
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/*
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* Allocate window space in one chunk.
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*/
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if ((win->wspace =
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malloc(nc * nl * sizeof(__LDATA))) == NULL) {
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free(win->lines);
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free(win->lspace);
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free(win);
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return NULL;
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}
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/*
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* Point line pointers to line space, and lines themselves into
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* window space.
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*/
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for (lp = win->lspace, i = 0; i < nl; i++, lp++) {
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win->lines[i] = lp;
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lp->line = &win->wspace[i * nc];
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lp->firstchp = &lp->firstch;
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lp->lastchp = &lp->lastch;
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lp->firstch = 0;
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lp->lastch = 0;
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}
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}
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#ifdef DEBUG
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__CTRACE("makenew: nc = %d\n", nc);
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#endif
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win->cury = win->curx = 0;
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win->maxy = nl;
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win->maxx = nc;
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win->begy = by;
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win->begx = bx;
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win->flags = 0;
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__swflags(win);
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#ifdef DEBUG
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__CTRACE("makenew: win->flags = %0.2o\n", win->flags);
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__CTRACE("makenew: win->maxy = %d\n", win->maxy);
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__CTRACE("makenew: win->maxx = %d\n", win->maxx);
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__CTRACE("makenew: win->begy = %d\n", win->begy);
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__CTRACE("makenew: win->begx = %d\n", win->begx);
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#endif
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return (win);
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}
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void
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__swflags(win)
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register WINDOW *win;
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{
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win->flags &=
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~(__ENDLINE | __FULLLINE | __FULLWIN | __SCROLLWIN | __LEAVEOK);
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if (win->begx + win->maxx == COLS) {
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win->flags |= __ENDLINE;
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if (win->begx == 0) {
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if (AL && DL)
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win->flags |= __FULLLINE;
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if (win->maxy == LINES && win->begy == 0)
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win->flags |= __FULLWIN;
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}
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if (win->begy + win->maxy == LINES)
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win->flags |= __SCROLLWIN;
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}
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}
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