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/* $OpenBSD: lib_newwin.c,v 1.3 1997/12/03 05:21:25 millert Exp $ */
/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/*
** lib_newwin.c
**
** The routines newwin(), subwin() and their dependent
**
*/
#include <curses.priv.h>
MODULE_ID("Id: lib_newwin.c,v 1.18 1997/08/09 17:21:49 tom Exp $")
void _nc_freewin(WINDOW *win)
{
WINDOWLIST *p, *q;
int i;
if (win != 0) {
for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
if (p->win == win) {
if (q == 0)
_nc_windows = p->next;
else
q->next = p->next;
free(p);
if (! (win->_flags & _SUBWIN)) {
for (i = 0; i <= win->_maxy && win->_line[i].text; i++)
free(win->_line[i].text);
}
free(win->_line);
free(win);
if (win == curscr) curscr = 0;
if (win == stdscr) stdscr = 0;
if (win == newscr) newscr = 0;
T(("...deleted win=%p", win));
break;
}
}
}
}
WINDOW * newwin(int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
chtype *ptr;
int i;
T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
returnWin(0);
if (num_lines == 0)
num_lines = SP->_lines_avail - begy;
if (num_columns == 0)
num_columns = screen_columns - begx;
if (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines_avail)
returnWin(0);
if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
returnWin(0);
for (i = 0; i < num_lines; i++) {
if ((win->_line[i].text = typeCalloc(chtype, (unsigned)num_columns)) == 0) {
_nc_freewin(win);
returnWin(0);
}
for (ptr = win->_line[i].text; ptr < win->_line[i].text + num_columns; )
*ptr++ = ' ';
}
T(("newwin: returned window is %p", win));
returnWin(win);
}
WINDOW * derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
int i;
int flags = _SUBWIN;
T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns, begy, begx));
/*
** make sure window fits inside the original one
*/
if ( begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
returnWin(0);
if ( begy + num_lines > orig->_maxy + 1
|| begx + num_columns > orig->_maxx + 1)
returnWin(0);
if (num_lines == 0)
num_lines = orig->_maxy - begy;
if (num_columns == 0)
num_columns = orig->_maxx - begx;
if (orig->_flags & _ISPAD)
flags |= _ISPAD;
if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy, orig->_begx + begx, flags)) == 0)
returnWin(0);
win->_pary = begy;
win->_parx = begx;
win->_attrs = orig->_attrs;
win->_bkgd = orig->_bkgd;
for (i = 0; i < num_lines; i++)
win->_line[i].text = &orig->_line[begy++].text[begx];
win->_parent = orig;
T(("derwin: returned window is %p", win));
returnWin(win);
}
WINDOW *subwin(WINDOW *w, int l, int c, int y, int x)
{
T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
T(("parent has begy = %d, begx = %d", w->_begy, w->_begx));
returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
}
WINDOW *
_nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
{
int i;
WINDOWLIST *wp;
WINDOW *win;
bool is_pad = (flags & _ISPAD);
T(("_nc_makenew(%d,%d,%d,%d)", num_lines, num_columns, begy, begx));
if (num_lines <= 0 || num_columns <= 0)
return 0;
if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
return 0;
if ((win = typeCalloc(WINDOW, 1)) == 0)
return 0;
if ((win->_line = typeCalloc(struct ldat, ((unsigned)num_lines))) == 0) {
free(win);
return 0;
}
win->_curx = 0;
win->_cury = 0;
win->_maxy = num_lines - 1;
win->_maxx = num_columns - 1;
win->_begy = begy;
win->_begx = begx;
win->_yoffset = SP->_topstolen;
win->_flags = flags;
win->_attrs = A_NORMAL;
win->_bkgd = BLANK;
win->_clear = is_pad ? FALSE : (num_lines == screen_lines && num_columns == screen_columns);
win->_idlok = FALSE;
win->_idcok = TRUE;
win->_scroll = FALSE;
win->_leaveok = FALSE;
win->_use_keypad = FALSE;
win->_delay = -1;
win->_immed = FALSE;
win->_sync = 0;
win->_parx = -1;
win->_pary = -1;
win->_parent = 0;
win->_regtop = 0;
win->_regbottom = num_lines - 1;
win->_pad._pad_y = -1;
win->_pad._pad_x = -1;
win->_pad._pad_top = -1;
win->_pad._pad_bottom = -1;
win->_pad._pad_left = -1;
win->_pad._pad_right = -1;
for (i = 0; i < num_lines; i++)
{
/*
* This used to do
*
* win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
*
* which marks the whole window unchanged. That's how
* SVr1 curses did it, but SVr4 curses marks the whole new
* window changed.
*
* With the old SVr1-like code, say you have stdscr full of
* characters, then create a new window with newwin(),
* then do a printw(win, "foo ");, the trailing spaces are
* completely ignored by the following refreshes. So, you
* get "foojunkjunk" on the screen instead of "foo " as
* you actually intended.
*
* SVr4 doesn't do this. Instead the spaces are actually written.
* So that's how we want ncurses to behave.
*/
win->_line[i].firstchar = 0;
win->_line[i].lastchar = num_columns-1;
if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
}
if (!is_pad && (begx + num_columns == screen_columns)) {
win->_flags |= _ENDLINE;
if (begx == 0 && num_lines == screen_lines && begy == 0)
win->_flags |= _FULLWIN;
if (begy + num_lines == screen_lines)
win->_flags |= _SCROLLWIN;
}
wp->next = _nc_windows;
wp->win = win;
_nc_windows = wp;
T((T_CREATE("window %p"), win));
return(win);
}
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