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/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#ifndef lint
static char
sccsid[] = "@(#)newwin.c 1.7 89/07/13 SMI"; /* from UCB 5.1 85/06/07 */
#endif /* not lint */
/*
* allocate space for and set up defaults for a new window
*
*/
#include "curses.ext"
#include <malloc.h>
#define SMALLOC (short *)malloc
/* forward declaration */
static WINDOW *makenew(int, int, int, int);
#undef nl /* don't need it here, and it interferes */
WINDOW *
newwin(int num_lines, int num_cols, int begy, int begx)
{
WINDOW *win;
char *sp;
int i, by, bx, nl, nc;
int j;
by = begy;
bx = begx;
nl = num_lines;
nc = num_cols;
if (nl == 0)
nl = LINES - by;
if (nc == 0)
nc = COLS - bx;
if ((win = makenew(nl, nc, by, bx)) == NULL)
return (ERR);
if ((win->_firstch = SMALLOC(nl * sizeof (win->_firstch[0]))) == NULL) {
free(win->_y);
free(win);
return (NULL);
}
if ((win->_lastch = SMALLOC(nl * sizeof (win->_lastch[0]))) == NULL) {
free(win->_y);
free(win->_firstch);
free(win);
return (NULL);
}
win->_nextp = win;
for (i = 0; i < nl; i++) {
win->_firstch[i] = _NOCHANGE;
win->_lastch[i] = _NOCHANGE;
}
for (i = 0; i < nl; i++)
if ((win->_y[i] = malloc(nc * sizeof (win->_y[0]))) == NULL) {
for (j = 0; j < i; j++)
free(win->_y[j]);
free(win->_firstch);
free(win->_lastch);
free(win->_y);
free(win);
return (ERR);
}
else
for (sp = win->_y[i]; sp < win->_y[i] + nc; )
*sp++ = ' ';
win->_ch_off = 0;
#ifdef DEBUG
fprintf(outf, "NEWWIN: win->_ch_off = %d\n", win->_ch_off);
#endif
return (win);
}
WINDOW *
subwin(WINDOW *orig, int num_lines, int num_cols, int begy, int begx)
{
WINDOW *win;
int by, bx, nl, nc;
by = begy;
bx = begx;
nl = num_lines;
nc = num_cols;
/*
* make sure window fits inside the original one
*/
#ifdef DEBUG
fprintf(outf, "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 (ERR);
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)) == NULL)
return (ERR);
win->_nextp = orig->_nextp;
orig->_nextp = win;
win->_orig = orig;
_set_subwin_(orig, win);
return (win);
}
/*
* this code is shared with mvwin()
*/
void
_set_subwin_(WINDOW *orig, WINDOW *win)
{
int i, j, k;
j = win->_begy - orig->_begy;
k = win->_begx - orig->_begx;
win->_ch_off = (short)k;
#ifdef DEBUG
fprintf(outf, "_SET_SUBWIN_: win->_ch_off = %d\n", win->_ch_off);
#endif
win->_firstch = &orig->_firstch[j];
win->_lastch = &orig->_lastch[j];
for (i = 0; i < win->_maxy; i++, j++)
win->_y[i] = &orig->_y[j][k];
}
/*
* This routine sets up a window buffer and returns a pointer to it.
*/
static WINDOW *
makenew(int num_lines, int num_cols, int begy, int begx)
{
WINDOW *win;
int by, bx, nl, nc;
by = begy;
bx = begx;
nl = num_lines;
nc = num_cols;
#ifdef DEBUG
fprintf(outf, "MAKENEW(%d, %d, %d, %d)\n", nl, nc, by, bx);
#endif
if ((win = (WINDOW *) malloc(sizeof (*win))) == NULL)
return (NULL);
#ifdef DEBUG
fprintf(outf, "MAKENEW: nl = %d\n", nl);
#endif
if ((win->_y = (char **)malloc(nl * sizeof (win->_y[0]))) == NULL) {
free(win);
return (NULL);
}
#ifdef DEBUG
fprintf(outf, "MAKENEW: nc = %d\n", nc);
#endif
win->_cury = win->_curx = 0;
win->_clear = FALSE;
win->_maxy = (short)nl;
win->_maxx = (short)nc;
win->_begy = (short)by;
win->_begx = (short)bx;
win->_flags = 0;
win->_scroll = win->_leave = FALSE;
_swflags_(win);
win->_orig = NULL;
#ifdef DEBUG
fprintf(outf, "MAKENEW: win->_clear = %d\n", win->_clear);
fprintf(outf, "MAKENEW: win->_leave = %d\n", win->_leave);
fprintf(outf, "MAKENEW: win->_scroll = %d\n", win->_scroll);
fprintf(outf, "MAKENEW: win->_flags = %0.2o\n", win->_flags);
fprintf(outf, "MAKENEW: win->_maxy = %d\n", win->_maxy);
fprintf(outf, "MAKENEW: win->_maxx = %d\n", win->_maxx);
fprintf(outf, "MAKENEW: win->_begy = %d\n", win->_begy);
fprintf(outf, "MAKENEW: win->_begx = %d\n", win->_begx);
#endif
return (win);
}
void
_swflags_(WINDOW *win)
{
win->_flags &= ~(_ENDLINE|_FULLLINE|_FULLWIN|_SCROLLWIN);
if (win->_begx + win->_maxx == COLS) {
win->_flags |= _ENDLINE;
if (win->_begx == 0) {
if (AL && DL)
win->_flags |= _FULLLINE;
if (win->_maxy == LINES && win->_begy == 0)
win->_flags |= _FULLWIN;
}
if (win->_begy + win->_maxy == LINES)
win->_flags |= _SCROLLWIN;
}
}
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