1 /****************************************************************************
2 * Copyright (c) 1998-2011,2016 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
7 * without limitation the rights to use, copy, modify, merge, publish, *
8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 * and: Juergen Pfeifer 2009 *
34 ****************************************************************************/
39 ** The routines newwin(), subwin() and their dependent
43 #include <curses.priv.h>
46 MODULE_ID("$Id: lib_newwin.c,v 1.72 2016/05/28 23:11:26 tom Exp $")
48 #define window_is(name) ((sp)->_##name == win)
51 #define remove_window(name) \
54 #define remove_window(name) \
61 remove_window_from_screen(WINDOW *win)
65 #ifdef USE_SP_WINDOWLIST
66 if ((sp = _nc_screen_of(win)) != 0) {
67 if (window_is(curscr)) {
68 remove_window(curscr);
69 } else if (window_is(stdscr)) {
70 remove_window(stdscr);
71 } else if (window_is(newscr)) {
72 remove_window(newscr);
76 for (each_screen(sp)) {
77 if (window_is(curscr)) {
78 remove_window(curscr);
80 } else if (window_is(stdscr)) {
81 remove_window(stdscr);
83 } else if (window_is(newscr)) {
84 remove_window(newscr);
92 _nc_freewin(WINDOW *win)
95 #ifdef USE_SP_WINDOWLIST
96 SCREEN *sp = _nc_screen_of(win); /* pretend this is parameter */
99 T((T_CALLED("_nc_freewin(%p)"), (void *) win));
103 if (_nc_nonsp_try_global(curses) == 0) {
107 for (each_window(SP_PARM, p)) {
109 if (&(p->win) == win) {
110 remove_window_from_screen(win);
112 WindowList(SP_PARM) = p->next;
116 if (!(win->_flags & _SUBWIN)) {
119 for (i = 0; i <= win->_maxy; i++)
120 FreeIfNeeded(win->_line[i].text);
126 T(("...deleted win=%p", (void *) win));
131 _nc_nonsp_unlock_global(curses);
137 NCURSES_EXPORT(WINDOW *)
138 NCURSES_SP_NAME(newwin) (NCURSES_SP_DCLx
139 int num_lines, int num_columns, int begy, int begx)
145 T((T_CALLED("newwin(%p, %d,%d,%d,%d)"), (void *) SP_PARM, num_lines, num_columns,
156 num_lines = SP_PARM->_lines_avail - begy;
157 if (num_columns == 0)
158 num_columns = screen_columns(SP_PARM) - begx;
160 win = NCURSES_SP_NAME(_nc_makenew) (NCURSES_SP_ARGx
161 num_lines, num_columns, begy, begx, 0);
165 for (i = 0; i < num_lines; i++) {
166 win->_line[i].text = typeCalloc(NCURSES_CH_T, (unsigned) num_columns);
167 if (win->_line[i].text == 0) {
168 (void) _nc_freewin(win);
171 for (ptr = win->_line[i].text;
172 ptr < win->_line[i].text + num_columns;
174 SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
181 NCURSES_EXPORT(WINDOW *)
182 newwin(int num_lines, int num_columns, int begy, int begx)
185 _nc_sp_lock_global(curses);
186 win = NCURSES_SP_NAME(newwin) (CURRENT_SCREEN,
187 num_lines, num_columns, begy, begx);
188 _nc_sp_unlock_global(curses);
193 NCURSES_EXPORT(WINDOW *)
194 derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
200 SCREEN *sp = _nc_screen_of(orig);
203 T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), (void *) orig, num_lines, num_columns,
207 * make sure window fits inside the original one
209 if (begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
211 if (begy + num_lines > orig->_maxy + 1
212 || begx + num_columns > orig->_maxx + 1)
216 num_lines = orig->_maxy + 1 - begy;
218 if (num_columns == 0)
219 num_columns = orig->_maxx + 1 - begx;
221 if (orig->_flags & _ISPAD)
224 win = NCURSES_SP_NAME(_nc_makenew) (NCURSES_SP_ARGx num_lines, num_columns,
226 orig->_begx + begx, flags);
232 WINDOW_ATTRS(win) = WINDOW_ATTRS(orig);
233 win->_nc_bkgd = orig->_nc_bkgd;
235 for (i = 0; i < num_lines; i++)
236 win->_line[i].text = &orig->_line[begy++].text[begx];
243 NCURSES_EXPORT(WINDOW *)
244 subwin(WINDOW *w, int l, int c, int y, int x)
248 T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), (void *) w, l, c, y, x));
250 T(("parent has begy = %ld, begx = %ld", (long) w->_begy, (long) w->_begx));
252 result = derwin(w, l, c, y - w->_begy, x - w->_begx);
258 dimension_limit(int value)
260 NCURSES_SIZE_T test = (NCURSES_SIZE_T) value;
261 return (test == value && value > 0);
264 NCURSES_EXPORT(WINDOW *)
265 NCURSES_SP_NAME(_nc_makenew) (NCURSES_SP_DCLx
275 bool is_padwin = (flags & _ISPAD);
277 T((T_CALLED("_nc_makenew(%p,%d,%d,%d,%d)"),
278 (void *) SP_PARM, num_lines, num_columns, begy, begx));
283 if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
286 if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
291 if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
296 _nc_nonsp_lock_global(curses);
300 win->_maxy = (NCURSES_SIZE_T) (num_lines - 1);
301 win->_maxx = (NCURSES_SIZE_T) (num_columns - 1);
302 win->_begy = (NCURSES_SIZE_T) begy;
303 win->_begx = (NCURSES_SIZE_T) begx;
304 win->_yoffset = SP_PARM->_topstolen;
306 win->_flags = (short) flags;
307 WINDOW_ATTRS(win) = A_NORMAL;
308 SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
310 win->_clear = (is_padwin
312 : (num_lines == screen_lines(SP_PARM)
313 && num_columns == screen_columns(SP_PARM)));
316 win->_scroll = FALSE;
317 win->_leaveok = FALSE;
318 win->_use_keypad = FALSE;
327 win->_regbottom = (NCURSES_SIZE_T) (num_lines - 1);
329 win->_pad._pad_y = -1;
330 win->_pad._pad_x = -1;
331 win->_pad._pad_top = -1;
332 win->_pad._pad_bottom = -1;
333 win->_pad._pad_left = -1;
334 win->_pad._pad_right = -1;
336 for (i = 0; i < num_lines; i++) {
340 * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
342 * which marks the whole window unchanged. That's how
343 * SVr1 curses did it, but SVr4 curses marks the whole new
346 * With the old SVr1-like code, say you have stdscr full of
347 * characters, then create a new window with newwin(),
348 * then do a printw(win, "foo ");, the trailing spaces are
349 * completely ignored by the following refreshes. So, you
350 * get "foojunkjunk" on the screen instead of "foo " as
351 * you actually intended.
353 * SVr4 doesn't do this. Instead the spaces are actually written.
354 * So that's how we want ncurses to behave.
356 win->_line[i].firstchar = 0;
357 win->_line[i].lastchar = (NCURSES_SIZE_T) (num_columns - 1);
359 if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
362 if (!is_padwin && (begx + num_columns == screen_columns(SP_PARM))) {
363 win->_flags |= _ENDLINE;
365 if (begx == 0 && num_lines == screen_lines(SP_PARM) && begy == 0)
366 win->_flags |= _FULLWIN;
368 if (begy + num_lines == screen_lines(SP_PARM))
369 win->_flags |= _SCROLLWIN;
372 wp->next = WindowList(SP_PARM);
373 wp->screen = SP_PARM;
374 WindowList(SP_PARM) = wp;
376 T((T_CREATE("window %p"), (void *) win));
378 _nc_nonsp_unlock_global(curses);
383 * wgetch() and other functions with a WINDOW* parameter may use a SCREEN*
384 * internally, and it is useful to allow those to be invoked without switching
385 * SCREEN's, e.g., for multi-threaded applications.
388 NCURSES_EXPORT(WINDOW *)
389 _nc_curscr_of(SCREEN *sp)
391 return sp == 0 ? 0 : CurScreen(sp);
394 NCURSES_EXPORT(WINDOW *)
395 _nc_newscr_of(SCREEN *sp)
397 return sp == 0 ? 0 : NewScreen(sp);
400 NCURSES_EXPORT(WINDOW *)
401 _nc_stdscr_of(SCREEN *sp)
403 return sp == 0 ? 0 : StdScreen(sp);