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/* $OpenBSD: lib_mvwin.c,v 1.4 1997/12/14 23:15:47 millert Exp $ */
/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/*
** lib_mvwin.c
**
** The routine mvwin().
**
*/
#include <curses.priv.h>
MODULE_ID("Id: lib_mvwin.c,v 1.6 1997/12/03 15:47:41 Alexander.V.Lukyanov Exp $")
int mvwin(WINDOW *win, int by, int bx)
{
T((T_CALLED("mvwin(%p,%d,%d)"), win, by, bx));
if (!win || (win->_flags & _ISPAD))
returnCode(ERR);
/* Copying subwindows is allowed, but it is expensive... */
if (win->_flags & _SUBWIN) {
int err = ERR;
WINDOW *parent = win->_parent;
if (parent)
{ /* Now comes the complicated and costly part, you should really
* try to avoid to move subwindows. Because a subwindow shares
* the text buffers with its parent, one can't do a simple
* memmove of the text buffers. One has to create a copy, then
* to relocate the subwindow and then to do a copy.
*/
if ((by - parent->_begy == win->_pary) &&
(bx - parent->_begx == win->_parx))
err=OK; /* we don't actually move */
else {
WINDOW* clone = dupwin(win);
if (clone) {
/* now we have the clone, so relocate win */
werase(win); /* Erase the original place */
wbkgd(win,parent->_bkgd);/* fill with parents background */
wsyncup(win); /* Tell the parent(s) */
err = mvderwin(win,
by - parent->_begy,
bx - parent->_begx);
if (err!=ERR) {
err = copywin(clone,win,
0, 0, 0, 0, win->_maxy, win->_maxx, 0);
if (ERR!=err)
wsyncup(win);
}
if (ERR==delwin(clone))
err=ERR;
}
}
}
returnCode(err);
}
if (by + win->_maxy > screen_lines - 1
|| bx + win->_maxx > screen_columns - 1
|| by < 0
|| bx < 0)
returnCode(ERR);
/*
* Whether or not the window is moved, touch the window's contents so
* that a following call to 'wrefresh()' will paint the window at the
* new location. This ensures that if the caller has refreshed another
* window at the same location, that this one will be displayed.
*/
win->_begy = by;
win->_begx = bx;
returnCode(touchwin(win));
}
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