/****************************************************************************
* Copyright 2020 Thomas E. Dickey *
* Copyright 1998-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
* and: Juergen Pfeifer 2009 *
****************************************************************************/
/*
** lib_newwin.c
**
** The routines newwin(), subwin() and their dependent
**
*/
#include <curses.priv.h>
#include <stddef.h>
MODULE_ID("$Id: lib_newwin.c,v 1.75 2020/02/02 23:34:34 tom Exp $")
#define window_is(name) ((sp)->_##name == win)
#if USE_REENTRANT
#define remove_window(name) \
sp->_##name = 0
#else
#define remove_window(name) \
sp->_##name = 0; \
if (win == name) \
name = 0
#endif
static void
remove_window_from_screen(WINDOW *win)
{
SCREEN *sp;
#ifdef USE_SP_WINDOWLIST
if ((sp = _nc_screen_of(win)) != 0) {
if (window_is(curscr)) {
remove_window(curscr);
} else if (window_is(stdscr)) {
remove_window(stdscr);
} else if (window_is(newscr)) {
remove_window(newscr);
}
}
#else
for (each_screen(sp)) {
if (window_is(curscr)) {
remove_window(curscr);
break;
} else if (window_is(stdscr)) {
remove_window(stdscr);
break;
} else if (window_is(newscr)) {
remove_window(newscr);
break;
}
}
#endif
}
NCURSES_EXPORT(int)
_nc_freewin(WINDOW *win)
{
int result = ERR;
#ifdef USE_SP_WINDOWLIST
SCREEN *sp = _nc_screen_of(win); /* pretend this is parameter */
#endif
T((T_CALLED("_nc_freewin(%p)"), (void *) win));
if (win != 0) {
if (_nc_nonsp_try_global(curses) == 0) {
WINDOWLIST *p, *q;
q = 0;
for (each_window(sp, p)) {
if (&(p->win) == win) {
remove_window_from_screen(win);
if (q == 0)
WindowList(sp) = p->next;
else
q->next = p->next;
if (!(win->_flags & _SUBWIN)) {
int i;
for (i = 0; i <= win->_maxy; i++)
FreeIfNeeded(win->_line[i].text);
}
free(win->_line);
free(p);
result = OK;
T(("...deleted win=%p", (void *) win));
break;
}
q = p;
}
_nc_nonsp_unlock_global(curses);
}
}
returnCode(result);
}
NCURSES_EXPORT(WINDOW *)
NCURSES_SP_NAME(newwin) (NCURSES_SP_DCLx
int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
NCURSES_CH_T *ptr;
int i;
T((T_CALLED("newwin(%p, %d,%d,%d,%d)"), (void *) SP_PARM, num_lines, num_columns,
begy, begx));
if (begy < 0
|| begx < 0
|| num_lines < 0
|| num_columns < 0
|| SP_PARM == 0)
returnWin(0);
if (num_lines == 0)
num_lines = SP_PARM->_lines_avail - begy;
if (num_columns == 0)
num_columns = screen_columns(SP_PARM) - begx;
win = NCURSES_SP_NAME(_nc_makenew) (NCURSES_SP_ARGx
num_lines, num_columns, begy, begx, 0);
if (win == 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);
}
#if NCURSES_SP_FUNCS
NCURSES_EXPORT(WINDOW *)
newwin(int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
_nc_sp_lock_global(curses);
win = NCURSES_SP_NAME(newwin) (CURRENT_SCREEN,
num_lines, num_columns, begy, begx);
_nc_sp_unlock_global(curses);
return (win);
}
#endif
NCURSES_EXPORT(WINDOW *)
derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
int i;
int flags = _SUBWIN;
#if NCURSES_SP_FUNCS
SCREEN *sp = _nc_screen_of(orig);
#endif
T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), (void *) 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 + 1 - begy;
if (num_columns == 0)
num_columns = orig->_maxx + 1 - begx;
if (orig->_flags & _ISPAD)
flags |= _ISPAD;
win = NCURSES_SP_NAME(_nc_makenew) (NCURSES_SP_ARGx num_lines, num_columns,
orig->_begy + begy,
orig->_begx + begx, flags);
if (win == 0)
returnWin(0);
win->_pary = begy;
win->_parx = begx;
WINDOW_ATTRS(win) = WINDOW_ATTRS(orig);
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)
{
WINDOW *result = 0;
T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), (void *) w, l, c, y, x));
if (w != 0) {
T(("parent has begy = %ld, begx = %ld", (long) w->_begy, (long) w->_begx));
result = derwin(w, l, c, y - w->_begy, x - w->_begx);
}
returnWin(result);
}
static bool
dimension_limit(int value)
{
NCURSES_SIZE_T test = (NCURSES_SIZE_T) value;
return (test == value && value > 0);
}
NCURSES_EXPORT(WINDOW *)
NCURSES_SP_NAME(_nc_makenew) (NCURSES_SP_DCLx
int num_lines,
int num_columns,
int begy,
int begx,
int flags)
{
int i;
WINDOWLIST *wp;
WINDOW *win;
bool is_padwin = (flags & _ISPAD);
T((T_CALLED("_nc_makenew(%p,%d,%d,%d,%d)"),
(void *) SP_PARM, num_lines, num_columns, begy, begx));
if (SP_PARM == 0)
returnWin(0);
if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
returnWin(0);
if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
returnWin(0);
win = &(wp->win);
if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
free(wp);
returnWin(0);
}
_nc_nonsp_lock_global(curses);
win->_curx = 0;
win->_cury = 0;
win->_maxy = (NCURSES_SIZE_T) (num_lines - 1);
win->_maxx = (NCURSES_SIZE_T) (num_columns - 1);
win->_begy = (NCURSES_SIZE_T) begy;
win->_begx = (NCURSES_SIZE_T) begx;
win->_yoffset = SP_PARM->_topstolen;
win->_flags = (short) flags;
WINDOW_ATTRS(win) = A_NORMAL;
SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
win->_clear = (is_padwin
? FALSE
: (num_lines == screen_lines(SP_PARM)
&& num_columns == screen_columns(SP_PARM)));
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 = (NCURSES_SIZE_T) (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 = (NCURSES_SIZE_T) (num_columns - 1);
if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
}
if (!is_padwin && (begx + num_columns == screen_columns(SP_PARM))) {
win->_flags |= _ENDLINE;
if (begx == 0 && num_lines == screen_lines(SP_PARM) && begy == 0)
win->_flags |= _FULLWIN;
if (begy + num_lines == screen_lines(SP_PARM))
win->_flags |= _SCROLLWIN;
}
wp->next = WindowList(SP_PARM);
wp->screen = SP_PARM;
WindowList(SP_PARM) = wp;
T((T_CREATE("window %p"), (void *) win));
_nc_nonsp_unlock_global(curses);
returnWin(win);
}
/*
* wgetch() and other functions with a WINDOW* parameter may use a SCREEN*
* internally, and it is useful to allow those to be invoked without switching
* SCREEN's, e.g., for multi-threaded applications.
*/
#if NCURSES_SP_FUNCS
NCURSES_EXPORT(WINDOW *)
_nc_curscr_of(SCREEN *sp)
{
return (sp == 0) ? NULL : CurScreen(sp);
}
NCURSES_EXPORT(WINDOW *)
_nc_newscr_of(SCREEN *sp)
{
return (sp == 0) ? NULL : NewScreen(sp);
}
NCURSES_EXPORT(WINDOW *)
_nc_stdscr_of(SCREEN *sp)
{
return (sp == 0) ? NULL : StdScreen(sp);
}
#endif
