1 /****************************************************************************
2 * Copyright (c) 1998 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 ****************************************************************************/
39 ** The routines newwin(), subwin() and their dependent
43 #include <curses.priv.h>
45 MODULE_ID("$Id: lib_newwin.c,v 1.19 1998/02/11 12:13:54 tom Exp $")
47 void _nc_freewin(WINDOW *win)
53 for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
56 _nc_windows = p->next;
61 if (! (win->_flags & _SUBWIN)) {
62 for (i = 0; i <= win->_maxy && win->_line[i].text; i++)
63 free(win->_line[i].text);
68 if (win == curscr) curscr = 0;
69 if (win == stdscr) stdscr = 0;
70 if (win == newscr) newscr = 0;
72 T(("...deleted win=%p", win));
79 WINDOW * newwin(int num_lines, int num_columns, int begy, int begx)
85 T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
87 if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
91 num_lines = SP->_lines_avail - begy;
93 num_columns = screen_columns - begx;
95 if (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines_avail)
98 if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
101 for (i = 0; i < num_lines; i++) {
102 if ((win->_line[i].text = typeCalloc(chtype, (unsigned)num_columns)) == 0) {
106 for (ptr = win->_line[i].text; ptr < win->_line[i].text + num_columns; )
110 T(("newwin: returned window is %p", win));
115 WINDOW * derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
121 T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns, begy, begx));
124 ** make sure window fits inside the original one
126 if ( begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
128 if ( begy + num_lines > orig->_maxy + 1
129 || begx + num_columns > orig->_maxx + 1)
133 num_lines = orig->_maxy - begy;
135 if (num_columns == 0)
136 num_columns = orig->_maxx - begx;
138 if (orig->_flags & _ISPAD)
141 if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy, orig->_begx + begx, flags)) == 0)
146 win->_attrs = orig->_attrs;
147 win->_bkgd = orig->_bkgd;
149 for (i = 0; i < num_lines; i++)
150 win->_line[i].text = &orig->_line[begy++].text[begx];
154 T(("derwin: returned window is %p", win));
160 WINDOW *subwin(WINDOW *w, int l, int c, int y, int x)
162 T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
163 T(("parent has begy = %d, begx = %d", w->_begy, w->_begx));
165 returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
169 _nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
174 bool is_pad = (flags & _ISPAD);
176 T(("_nc_makenew(%d,%d,%d,%d)", num_lines, num_columns, begy, begx));
178 if (num_lines <= 0 || num_columns <= 0)
181 if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
184 if ((win = typeCalloc(WINDOW, 1)) == 0)
187 if ((win->_line = typeCalloc(struct ldat, ((unsigned)num_lines))) == 0) {
194 win->_maxy = num_lines - 1;
195 win->_maxx = num_columns - 1;
198 win->_yoffset = SP->_topstolen;
201 win->_attrs = A_NORMAL;
204 win->_clear = is_pad ? FALSE : (num_lines == screen_lines && num_columns == screen_columns);
207 win->_scroll = FALSE;
208 win->_leaveok = FALSE;
209 win->_use_keypad = FALSE;
218 win->_regbottom = num_lines - 1;
220 win->_pad._pad_y = -1;
221 win->_pad._pad_x = -1;
222 win->_pad._pad_top = -1;
223 win->_pad._pad_bottom = -1;
224 win->_pad._pad_left = -1;
225 win->_pad._pad_right = -1;
227 for (i = 0; i < num_lines; i++)
232 * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
234 * which marks the whole window unchanged. That's how
235 * SVr1 curses did it, but SVr4 curses marks the whole new
238 * With the old SVr1-like code, say you have stdscr full of
239 * characters, then create a new window with newwin(),
240 * then do a printw(win, "foo ");, the trailing spaces are
241 * completely ignored by the following refreshes. So, you
242 * get "foojunkjunk" on the screen instead of "foo " as
243 * you actually intended.
245 * SVr4 doesn't do this. Instead the spaces are actually written.
246 * So that's how we want ncurses to behave.
248 win->_line[i].firstchar = 0;
249 win->_line[i].lastchar = num_columns-1;
251 if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
254 if (!is_pad && (begx + num_columns == screen_columns)) {
255 win->_flags |= _ENDLINE;
257 if (begx == 0 && num_lines == screen_lines && begy == 0)
258 win->_flags |= _FULLWIN;
260 if (begy + num_lines == screen_lines)
261 win->_flags |= _SCROLLWIN;
264 wp->next = _nc_windows;
268 T((T_CREATE("window %p"), win));