1 /****************************************************************************
2 * Copyright (c) 1998,1999,2000,2001 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 *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 ****************************************************************************/
37 ** The routines newwin(), subwin() and their dependent
41 #include <curses.priv.h>
43 MODULE_ID("$Id: lib_newwin.c,v 1.33 2001/12/19 01:06:30 tom Exp $")
46 _nc_freewin(WINDOW *win)
53 for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
54 if (&(p->win) == win) {
56 _nc_windows = p->next;
60 if (!(win->_flags & _SUBWIN)) {
61 for (i = 0; i <= win->_maxy; i++)
62 FreeIfNeeded(win->_line[i].text);
75 T(("...deleted win=%p", win));
83 NCURSES_EXPORT(WINDOW *)
84 newwin(int num_lines, int num_columns, int begy, int begx)
90 T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
92 if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
96 num_lines = SP->_lines_avail - begy;
98 num_columns = screen_columns - begx;
100 if (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines_avail)
103 if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
106 for (i = 0; i < num_lines; i++) {
107 win->_line[i].text = typeCalloc(NCURSES_CH_T, (unsigned) num_columns);
108 if (win->_line[i].text == 0) {
109 (void) _nc_freewin(win);
112 for (ptr = win->_line[i].text;
113 ptr < win->_line[i].text + num_columns;
115 SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
121 NCURSES_EXPORT(WINDOW *)
122 derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
128 T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns,
132 * make sure window fits inside the original one
134 if (begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
136 if (begy + num_lines > orig->_maxy + 1
137 || begx + num_columns > orig->_maxx + 1)
141 num_lines = orig->_maxy + 1 - begy;
143 if (num_columns == 0)
144 num_columns = orig->_maxx + 1 - begx;
146 if (orig->_flags & _ISPAD)
149 if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy,
150 orig->_begx + begx, flags)) == 0)
155 win->_attrs = orig->_attrs;
156 win->_nc_bkgd = orig->_nc_bkgd;
158 for (i = 0; i < num_lines; i++)
159 win->_line[i].text = &orig->_line[begy++].text[begx];
166 NCURSES_EXPORT(WINDOW *)
167 subwin(WINDOW *w, int l, int c, int y, int x)
169 T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
170 T(("parent has begy = %d, begx = %d", w->_begy, w->_begx));
172 returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
176 dimension_limit(int value)
178 NCURSES_SIZE_T test = value;
179 return (test == value && value > 0);
182 NCURSES_EXPORT(WINDOW *)
183 _nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
188 bool is_pad = (flags & _ISPAD);
190 T(("_nc_makenew(%d,%d,%d,%d)", num_lines, num_columns, begy, begx));
192 if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
195 if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
200 if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
207 win->_maxy = num_lines - 1;
208 win->_maxx = num_columns - 1;
211 win->_yoffset = SP->_topstolen;
214 win->_attrs = A_NORMAL;
215 SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
217 win->_clear = is_pad ? FALSE : (num_lines == screen_lines
218 && num_columns == screen_columns);
221 win->_scroll = FALSE;
222 win->_leaveok = FALSE;
223 win->_use_keypad = FALSE;
232 win->_regbottom = num_lines - 1;
234 win->_pad._pad_y = -1;
235 win->_pad._pad_x = -1;
236 win->_pad._pad_top = -1;
237 win->_pad._pad_bottom = -1;
238 win->_pad._pad_left = -1;
239 win->_pad._pad_right = -1;
241 for (i = 0; i < num_lines; i++) {
245 * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
247 * which marks the whole window unchanged. That's how
248 * SVr1 curses did it, but SVr4 curses marks the whole new
251 * With the old SVr1-like code, say you have stdscr full of
252 * characters, then create a new window with newwin(),
253 * then do a printw(win, "foo ");, the trailing spaces are
254 * completely ignored by the following refreshes. So, you
255 * get "foojunkjunk" on the screen instead of "foo " as
256 * you actually intended.
258 * SVr4 doesn't do this. Instead the spaces are actually written.
259 * So that's how we want ncurses to behave.
261 win->_line[i].firstchar = 0;
262 win->_line[i].lastchar = num_columns - 1;
264 if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
267 if (!is_pad && (begx + num_columns == screen_columns)) {
268 win->_flags |= _ENDLINE;
270 if (begx == 0 && num_lines == screen_lines && begy == 0)
271 win->_flags |= _FULLWIN;
273 if (begy + num_lines == screen_lines)
274 win->_flags |= _SCROLLWIN;
277 wp->next = _nc_windows;
280 T((T_CREATE("window %p"), win));