326 lines
8.4 KiB
C
326 lines
8.4 KiB
C
/* $NetBSD: newwin.c,v 1.32 2002/12/05 17:14:34 jdc Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
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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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)newwin.c 8.3 (Berkeley) 7/27/94";
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#else
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__RCSID("$NetBSD: newwin.c,v 1.32 2002/12/05 17:14:34 jdc Exp $");
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#endif
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#endif /* not lint */
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#include <stdlib.h>
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#include "curses.h"
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#include "curses_private.h"
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extern struct __winlist *winlistp;
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static WINDOW *__makenew(SCREEN *screen, int nlines, int ncols, int by,
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int bx, int sub);
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/*
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* derwin --
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* Create a new window in the same manner as subwin but (by, bx)
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* are relative to the origin of window orig instead of absolute.
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*/
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WINDOW *
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derwin(WINDOW *orig, int nlines, int ncols, int by, int bx)
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{
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if (orig == NULL)
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return ERR;
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return subwin(orig, nlines, ncols, orig->begy + by, orig->begx + bx);
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}
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/*
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* dupwin --
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* Create a copy of the given window.
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*/
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WINDOW *
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dupwin(WINDOW *win)
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{
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WINDOW *new_one;
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if ((new_one =
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newwin(win->maxy, win->maxx, win->begy, win->begx)) == NULL)
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return NULL;
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overwrite(win, new_one);
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return new_one;
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}
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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(int nlines, int ncols, int by, int bx)
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{
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return __newwin(_cursesi_screen, nlines, ncols, by, bx);
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}
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WINDOW *
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__newwin(SCREEN *screen, int nlines, int ncols, int by, int bx)
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{
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WINDOW *win;
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__LINE *lp;
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int i, j;
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__LDATA *sp;
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if (nlines == 0)
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nlines = LINES - by;
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if (ncols == 0)
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ncols = COLS - bx;
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if ((win = __makenew(screen, nlines, ncols, 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 < nlines; 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 < ncols; j++, sp++) {
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sp->ch = ' ';
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sp->bch = ' ';
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sp->attr = 0;
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if (__using_color)
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sp->battr = __default_color;
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else
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sp->battr = 0;
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}
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lp->hash = __hash((char *)(void *)lp->line,
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(size_t) (ncols * __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(WINDOW *orig, int nlines, int ncols, int by, int bx)
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{
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int i;
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__LINE *lp;
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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, nlines, ncols, by, bx);
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#endif
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if (by < orig->begy || bx < orig->begx
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|| by + nlines > orig->maxy + orig->begy
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|| bx + ncols > orig->maxx + orig->begx)
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return (NULL);
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if (nlines == 0)
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nlines = orig->maxy + orig->begy - by;
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if (ncols == 0)
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ncols = orig->maxx + orig->begx - bx;
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if ((win = __makenew(_cursesi_screen, nlines, ncols,
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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(WINDOW *orig, WINDOW *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 - orig->begy];
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#ifdef DEBUG
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lp->sentinel = SENTINEL_VALUE;
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#endif
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lp->line = &olp->line[win->ch_off];
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lp->firstchp = &olp->firstch;
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lp->lastchp = &olp->lastch;
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lp->hash = __hash((char *)(void *)lp->line,
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(size_t) (win->maxx * __LDATASIZE));
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}
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#ifdef DEBUG
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__CTRACE("__set_subwin: win %0.2o ch_off = %d\n", win, 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(SCREEN *screen, int nlines, int ncols, int by, int bx, int sub)
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{
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WINDOW *win;
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__LINE *lp;
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struct __winlist *wlp, *wlp2;
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int i;
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#ifdef DEBUG
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__CTRACE("makenew: (%d, %d, %d, %d)\n", nlines, ncols, by, bx);
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#endif
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if ((win = malloc(sizeof(WINDOW))) == NULL)
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return (NULL);
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#ifdef DEBUG
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__CTRACE("makenew: nlines = %d\n", nlines);
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#endif
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/* Set up line pointer array and line space. */
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if ((win->lines = malloc(nlines * 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(nlines * 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(ncols * nlines * 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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* Append window to window list.
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*/
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if ((wlp = malloc(sizeof(struct __winlist))) == NULL) {
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free(win->wspace);
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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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wlp->winp = win;
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wlp->nextp = NULL;
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if (screen->winlistp == NULL)
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screen->winlistp = wlp;
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else {
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wlp2 = screen->winlistp;
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while (wlp2->nextp != NULL)
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wlp2 = wlp2->nextp;
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wlp2->nextp = wlp;
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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 < nlines; i++, lp++) {
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win->lines[i] = lp;
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lp->line = &win->wspace[i * ncols];
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#ifdef DEBUG
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lp->sentinel = SENTINEL_VALUE;
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#endif
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lp->firstchp = &lp->firstch;
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lp->lastchp = &lp->lastch;
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lp->firstch = ncols;
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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: ncols = %d\n", ncols);
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#endif
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win->cury = win->curx = 0;
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win->maxy = nlines;
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win->maxx = ncols;
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win->begy = by;
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win->begx = bx;
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win->flags = (__IDLINE | __IDCHAR);
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win->delay = -1;
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win->wattr = 0;
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win->bch = ' ';
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if (__using_color)
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win->battr = __default_color;
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else
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win->battr = 0;
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win->scr_t = 0;
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win->scr_b = win->maxy - 1;
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__swflags(win);
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#ifdef DEBUG
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__CTRACE("makenew: win->wattr = %08x\n", win->wattr);
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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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__CTRACE("makenew: win->bch = %s\n", unctrl(win->bch));
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__CTRACE("makenew: win->battr = %08x\n", win->battr);
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__CTRACE("makenew: win->scr_t = %d\n", win->scr_t);
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__CTRACE("makenew: win->scr_b = %d\n", win->scr_b);
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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(WINDOW *win)
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{
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win->flags &= ~(__ENDLINE | __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 && win->maxy == LINES && win->begy == 0)
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win->flags |= __FULLWIN;
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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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