#include <curses.priv.h>
MODULE_ID("$Id: lib_newwin.c,v 1.34 2002/08/18 00:12:30 tom Exp $")
static WINDOW *
remove_window_from_screen(WINDOW *win)
{
SCREEN **scan = &_nc_screen_chain;
while (*scan) {
SCREEN *sp = *scan;
if (sp->_curscr == win) {
sp->_curscr = 0;
if (win == curscr)
curscr = 0;
} else if (sp->_stdscr == win) {
sp->_stdscr = 0;
if (win == stdscr)
stdscr = 0;
} else if (sp->_newscr == win) {
sp->_newscr = 0;
if (win == newscr)
newscr = 0;
} else {
scan = &(*scan)->_next_screen;
continue;
}
break;
}
return 0;
}
NCURSES_EXPORT(int)
_nc_freewin(WINDOW *win)
{
WINDOWLIST *p, *q;
int i;
int result = ERR;
if (win != 0) {
for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
if (&(p->win) == win) {
remove_window_from_screen(win);
if (q == 0)
_nc_windows = p->next;
else
q->next = p->next;
if (!(win->_flags & _SUBWIN)) {
for (i = 0; i <= win->_maxy; i++)
FreeIfNeeded(win->_line[i].text);
}
free(win->_line);
free(p);
result = OK;
T(("...deleted win=%p", win));
break;
}
}
}
return result;
}
NCURSES_EXPORT(WINDOW *)
newwin(int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
NCURSES_CH_T *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++) {
win->_line[i].text = typeCalloc(NCURSES_CH_T, (unsigned) num_columns);
if (win->_line[i].text == 0) {
(void) _nc_freewin(win);
returnWin(0);
}
for (ptr = win->_line[i].text;
ptr < win->_line[i].text + num_columns;
ptr++)
SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
}
returnWin(win);
}
NCURSES_EXPORT(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));
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 + 1 - begy;
if (num_columns == 0)
num_columns = orig->_maxx + 1 - 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->_nc_bkgd = orig->_nc_bkgd;
for (i = 0; i < num_lines; i++)
win->_line[i].text = &orig->_line[begy++].text[begx];
win->_parent = orig;
returnWin(win);
}
NCURSES_EXPORT(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));
}
static bool
dimension_limit(int value)
{
NCURSES_SIZE_T test = value;
return (test == value && value > 0);
}
NCURSES_EXPORT(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 (!dimension_limit(num_lines) || !dimension_limit(num_columns))
return 0;
if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
return 0;
win = &(wp->win);
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;
SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
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++) {
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;
_nc_windows = wp;
T((T_CREATE("window %p"), win));
return (win);
}