1 /****************************************************************************
2 * Copyright (c) 1998-2008,2009 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 *
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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 1.53 2009/02/15 00:38:00 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 for (each_screen(sp)) {
66 if (window_is(curscr)) {
67 remove_window(curscr);
69 } else if (window_is(stdscr)) {
70 remove_window(stdscr);
72 } else if (window_is(newscr)) {
73 remove_window(newscr);
80 _nc_freewin(WINDOW *win)
86 T((T_CALLED("_nc_freewin(%p)"), win));
89 if (_nc_try_global(curses) == 0) {
91 for (each_window(p)) {
92 if (&(p->win) == win) {
93 remove_window_from_screen(win);
95 _nc_windows = p->next;
99 if (!(win->_flags & _SUBWIN)) {
100 for (i = 0; i <= win->_maxy; i++)
101 FreeIfNeeded(win->_line[i].text);
107 T(("...deleted win=%p", win));
112 _nc_unlock_global(curses);
118 NCURSES_EXPORT(WINDOW *)
119 NCURSES_SP_NAME(newwin) (NCURSES_SP_DCLx
120 int num_lines, int num_columns, int begy, int begx)
126 T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
128 if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
132 num_lines = SP_PARM->_lines_avail - begy;
133 if (num_columns == 0)
134 num_columns = screen_columns - begx;
136 if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
139 for (i = 0; i < num_lines; i++) {
140 win->_line[i].text = typeCalloc(NCURSES_CH_T, (unsigned) num_columns);
141 if (win->_line[i].text == 0) {
142 (void) _nc_freewin(win);
145 for (ptr = win->_line[i].text;
146 ptr < win->_line[i].text + num_columns;
148 SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
155 NCURSES_EXPORT(WINDOW *)
156 newwin(int num_lines, int num_columns, int begy, int begx)
158 return NCURSES_SP_NAME(newwin) (CURRENT_SCREEN, num_lines, num_columns,
163 NCURSES_EXPORT(WINDOW *)
164 derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
170 T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns,
174 * make sure window fits inside the original one
176 if (begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
178 if (begy + num_lines > orig->_maxy + 1
179 || begx + num_columns > orig->_maxx + 1)
183 num_lines = orig->_maxy + 1 - begy;
185 if (num_columns == 0)
186 num_columns = orig->_maxx + 1 - begx;
188 if (orig->_flags & _ISPAD)
191 if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy,
192 orig->_begx + begx, flags)) == 0)
197 WINDOW_ATTRS(win) = WINDOW_ATTRS(orig);
198 win->_nc_bkgd = orig->_nc_bkgd;
200 for (i = 0; i < num_lines; i++)
201 win->_line[i].text = &orig->_line[begy++].text[begx];
208 NCURSES_EXPORT(WINDOW *)
209 subwin(WINDOW *w, int l, int c, int y, int x)
211 T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
212 T(("parent has begy = %ld, begx = %ld", (long) w->_begy, (long) w->_begx));
214 returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
218 dimension_limit(int value)
220 NCURSES_SIZE_T test = value;
221 return (test == value && value > 0);
224 NCURSES_EXPORT(WINDOW *)
225 _nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
230 bool is_pad = (flags & _ISPAD);
232 T((T_CALLED("_nc_makenew(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
237 if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
240 if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
245 if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
250 _nc_lock_global(curses);
254 win->_maxy = num_lines - 1;
255 win->_maxx = num_columns - 1;
258 win->_yoffset = SP->_topstolen;
261 WINDOW_ATTRS(win) = A_NORMAL;
262 SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
264 win->_clear = is_pad ? FALSE : (num_lines == screen_lines
265 && num_columns == screen_columns);
268 win->_scroll = FALSE;
269 win->_leaveok = FALSE;
270 win->_use_keypad = FALSE;
279 win->_regbottom = num_lines - 1;
281 win->_pad._pad_y = -1;
282 win->_pad._pad_x = -1;
283 win->_pad._pad_top = -1;
284 win->_pad._pad_bottom = -1;
285 win->_pad._pad_left = -1;
286 win->_pad._pad_right = -1;
288 for (i = 0; i < num_lines; i++) {
292 * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
294 * which marks the whole window unchanged. That's how
295 * SVr1 curses did it, but SVr4 curses marks the whole new
298 * With the old SVr1-like code, say you have stdscr full of
299 * characters, then create a new window with newwin(),
300 * then do a printw(win, "foo ");, the trailing spaces are
301 * completely ignored by the following refreshes. So, you
302 * get "foojunkjunk" on the screen instead of "foo " as
303 * you actually intended.
305 * SVr4 doesn't do this. Instead the spaces are actually written.
306 * So that's how we want ncurses to behave.
308 win->_line[i].firstchar = 0;
309 win->_line[i].lastchar = num_columns - 1;
311 if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
314 if (!is_pad && (begx + num_columns == screen_columns)) {
315 win->_flags |= _ENDLINE;
317 if (begx == 0 && num_lines == screen_lines && begy == 0)
318 win->_flags |= _FULLWIN;
320 if (begy + num_lines == screen_lines)
321 win->_flags |= _SCROLLWIN;
324 wp->next = _nc_windows;
328 T((T_CREATE("window %p"), win));
330 _nc_unlock_global(curses);
335 * wgetch() and other functions with a WINDOW* parameter may use a SCREEN*
336 * internally, and it is useful to allow those to be invoked without switching
337 * SCREEN's, e.g., for multi-threaded applications.
339 NCURSES_EXPORT(SCREEN *)
340 _nc_screen_of(WINDOW *win)
345 WINDOWLIST *wp = (WINDOWLIST *) win;