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/* $OpenBSD: resizeterm.c,v 1.2 1997/12/03 05:21:43 millert Exp $ */
/******************************************************************************
* Copyright 1996,1997 by Thomas E. Dickey <dickey@clark.net> *
* All Rights Reserved. *
* *
* Permission to use, copy, modify, and distribute this software and its *
* documentation for any purpose and without fee is hereby granted, provided *
* that the above copyright notice appear in all copies and that both that *
* copyright notice and this permission notice appear in supporting *
* documentation, and that the name of the above listed copyright holder(s) *
* not be used in advertising or publicity pertaining to distribution of the *
* software without specific, written prior permission. THE ABOVE LISTED *
* COPYRIGHT HOLDER(S) DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, *
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO *
* EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY *
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER *
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF *
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN *
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *
******************************************************************************/
/*
* This is an extension to the curses library. It provides callers with a hook
* into the NCURSES data to resize windows, primarily for use by programs
* running in an X Window terminal (e.g., xterm). I abstracted this module
* from my application library for NCURSES because it must be compiled with
* the private data structures -- T.Dickey 1995/7/4.
*/
#include <curses.priv.h>
#include <term.h>
MODULE_ID("Id: resizeterm.c,v 1.5 1997/09/07 03:20:59 tom Exp $")
/*
* This function reallocates NCURSES window structures. It is invoked in
* response to a SIGWINCH interrupt. Other user-defined windows may also need
* to be reallocated.
*
* Because this performs memory allocation, it should not (in general) be
* invoked directly from the signal handler.
*/
int
resizeterm(int ToLines, int ToCols)
{
int stolen = screen_lines - SP->_lines_avail;
int bottom = screen_lines + SP->_topstolen - stolen;
T((T_CALLED("resizeterm(%d,%d) old(%d,%d)"),
ToLines, ToCols,
screen_lines, screen_columns));
SP->_sig_winch = FALSE;
if (ToLines != screen_lines
|| ToCols != screen_columns) {
WINDOWLIST *wp;
#if USE_SIGWINCH
ungetch(KEY_RESIZE); /* so application can know this */
clearok(curscr, TRUE); /* screen contents is unknown */
#endif
for (wp = _nc_windows; wp != 0; wp = wp->next) {
WINDOW *win = wp->win;
int myLines = win->_maxy + 1;
int myCols = win->_maxx + 1;
/* pads aren't treated this way */
if (win->_flags & _ISPAD)
continue;
if (win->_begy >= bottom) {
win->_begy += (ToLines - screen_lines);
} else {
if (myLines == screen_lines - stolen
&& ToLines != screen_lines)
myLines = ToLines - stolen;
else
if (myLines == screen_lines
&& ToLines != screen_lines)
myLines = ToLines;
}
if (myCols == screen_columns
&& ToCols != screen_columns)
myCols = ToCols;
if (wresize(win, myLines, myCols) != OK)
returnCode(ERR);
}
screen_lines = lines = ToLines;
screen_columns = columns = ToCols;
SP->_lines_avail = lines - stolen;
}
/*
* Always update LINES, to allow for call from lib_doupdate.c which
* needs to have the count adjusted by the stolen (ripped off) lines.
*/
LINES = ToLines - stolen;
COLS = ToCols;
returnCode(OK);
}
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