1 /****************************************************************************
2 * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc. *
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5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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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 *
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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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 * and: Thomas E. Dickey 1996-on *
33 * and: Juergen Pfeifer *
34 ****************************************************************************/
39 ** The routine mvwin().
43 #include <curses.priv.h>
45 MODULE_ID("$Id: lib_mvwin.c,v 1.18 2010/12/19 01:22:58 tom Exp $")
48 mvwin(WINDOW *win, int by, int bx)
51 SCREEN *sp = _nc_screen_of(win);
54 T((T_CALLED("mvwin(%p,%d,%d)"), (void *) win, by, bx));
56 if (!win || (win->_flags & _ISPAD))
60 * mvwin() should only modify the indices. See test/demo_menus.c and
61 * test/movewindow.c for examples.
64 /* Copying subwindows is allowed, but it is expensive... */
65 if (win->_flags & _SUBWIN) {
67 WINDOW *parent = win->_parent;
68 if (parent) { /* Now comes the complicated and costly part, you should really
69 * try to avoid to move subwindows. Because a subwindow shares
70 * the text buffers with its parent, one can't do a simple
71 * memmove of the text buffers. One has to create a copy, then
72 * to relocate the subwindow and then to do a copy.
74 if ((by - parent->_begy == win->_pary) &&
75 (bx - parent->_begx == win->_parx))
76 err = OK; /* we don't actually move */
78 WINDOW *clone = dupwin(win);
80 /* now we have the clone, so relocate win */
82 werase(win); /* Erase the original place */
83 /* fill with parents background */
84 wbkgrnd(win, CHREF(parent->_nc_bkgd));
85 wsyncup(win); /* Tell the parent(s) */
91 err = copywin(clone, win,
92 0, 0, 0, 0, win->_maxy, win->_maxx, 0);
96 if (ERR == delwin(clone))
105 if (by + win->_maxy > screen_lines(SP_PARM) - 1
106 || bx + win->_maxx > screen_columns(SP_PARM) - 1
112 * Whether or not the window is moved, touch the window's contents so
113 * that a following call to 'wrefresh()' will paint the window at the
114 * new location. This ensures that if the caller has refreshed another
115 * window at the same location, that this one will be displayed.
117 win->_begy = (NCURSES_SIZE_T) by;
118 win->_begx = (NCURSES_SIZE_T) bx;
119 returnCode(touchwin(win));