1 /* $OpenBSD: lib_mvwin.c,v 1.4 2023/10/17 09:52:08 nicm Exp $ */
2
3 /****************************************************************************
4 * Copyright 2020,2021 Thomas E. Dickey *
5 * Copyright 1998-2009,2010 Free Software Foundation, Inc. *
6 * *
7 * Permission is hereby granted, free of charge, to any person obtaining a *
8 * copy of this software and associated documentation files (the *
9 * "Software"), to deal in the Software without restriction, including *
10 * without limitation the rights to use, copy, modify, merge, publish, *
11 * distribute, distribute with modifications, sublicense, and/or sell *
12 * copies of the Software, and to permit persons to whom the Software is *
13 * furnished to do so, subject to the following conditions: *
14 * *
15 * The above copyright notice and this permission notice shall be included *
16 * in all copies or substantial portions of the Software. *
17 * *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
25 * *
26 * Except as contained in this notice, the name(s) of the above copyright *
27 * holders shall not be used in advertising or otherwise to promote the *
28 * sale, use or other dealings in this Software without prior written *
29 * authorization. *
30 ****************************************************************************/
31
32 /****************************************************************************
33 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
34 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
35 * and: Thomas E. Dickey 1996-on *
36 * and: Juergen Pfeifer *
37 ****************************************************************************/
38
39 /*
40 ** lib_mvwin.c
41 **
42 ** The routine mvwin().
43 **
44 */
45
46 #include <curses.priv.h>
47
48 MODULE_ID("$Id: lib_mvwin.c,v 1.4 2023/10/17 09:52:08 nicm Exp $")
49
NCURSES_EXPORT(int)50 NCURSES_EXPORT(int)
51 mvwin(WINDOW *win, int by, int bx)
52 {
53 #if NCURSES_SP_FUNCS
54 SCREEN *sp = _nc_screen_of(win);
55 #endif
56
57 T((T_CALLED("mvwin(%p,%d,%d)"), (void *) win, by, bx));
58
59 if (!win || IS_PAD(win))
60 returnCode(ERR);
61
62 /*
63 * mvwin() should only modify the indices. See test/demo_menus.c and
64 * test/movewindow.c for examples.
65 */
66 #if 0
67 /* Copying subwindows is allowed, but it is expensive... */
68 if (IS_SUBWIN(win)) {
69 int err = ERR;
70 WINDOW *parent = win->_parent;
71 if (parent) { /* Now comes the complicated and costly part, you should really
72 * try to avoid to move subwindows. Because a subwindow shares
73 * the text buffers with its parent, one can't do a simple
74 * memmove of the text buffers. One has to create a copy, then
75 * to relocate the subwindow and then to do a copy.
76 */
77 if ((by - parent->_begy == win->_pary) &&
78 (bx - parent->_begx == win->_parx))
79 err = OK; /* we don't actually move */
80 else {
81 WINDOW *clone = dupwin(win);
82 if (clone) {
83 /* now we have the clone, so relocate win */
84
85 werase(win); /* Erase the original place */
86 /* fill with parents background */
87 wbkgrnd(win, CHREF(parent->_nc_bkgd));
88 wsyncup(win); /* Tell the parent(s) */
89
90 err = mvderwin(win,
91 by - parent->_begy,
92 bx - parent->_begx);
93 if (err != ERR) {
94 err = copywin(clone, win,
95 0, 0, 0, 0, win->_maxy, win->_maxx, 0);
96 if (ERR != err)
97 wsyncup(win);
98 }
99 if (ERR == delwin(clone))
100 err = ERR;
101 }
102 }
103 }
104 returnCode(err);
105 }
106 #endif
107
108 if (by + win->_maxy > screen_lines(SP_PARM) - 1
109 || bx + win->_maxx > screen_columns(SP_PARM) - 1
110 || by < 0
111 || bx < 0)
112 returnCode(ERR);
113
114 /*
115 * Whether or not the window is moved, touch the window's contents so
116 * that a following call to 'wrefresh()' will paint the window at the
117 * new location. This ensures that if the caller has refreshed another
118 * window at the same location, that this one will be displayed.
119 */
120 win->_begy = (NCURSES_SIZE_T) by;
121 win->_begx = (NCURSES_SIZE_T) bx;
122 returnCode(touchwin(win));
123 }
124