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frame.C
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1998-11-12
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// $Id: frame.C,v 1.7 1998/11/12 14:07:42 zeller Exp $ -*- C++ -*-
// Find the WM frame surrounding WINDOW
// Copyright (C) 1997 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// DDD is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
char frame_rcsid[] =
"$Id: frame.C,v 1.7 1998/11/12 14:07:42 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#endif
#include "bool.h"
#include "frame.h"
#include "XErrorB.h"
// Find the WM frame surrounding WINDOW.
Window frame(Display *display, Window window)
{
// The idea is that the WM frame surrounding WINDOW is a child of
// root. So we simply return the child of root that has WINDOW as
// a child.
Window root = 0;
XWindowAttributes root_attr;
bool have_root_attr = false;
XErrorBlocker blocker(display);
Window w = window;
for (;;)
{
Window parent;
Window *children = 0;
unsigned int nchildren;
Status ok =
XQueryTree(display, w, &root, &parent, &children, &nchildren);
XFree(children);
if (!ok)
break; // Not found
if (parent == root)
return w; // Got it
// TVTWM (and other window managers?) cover the root window
// entirely with a single (virtual) window. Check for this.
if (!have_root_attr)
{
XGetWindowAttributes(display, root, &root_attr);
have_root_attr = true;
}
XWindowAttributes parent_attr;
XGetWindowAttributes(display, parent, &parent_attr);
if (parent_attr.width >= root_attr.width &&
parent_attr.height >= root_attr.height)
{
// PARENT covers ROOT entirely -- is PARENT the child of ROOT?
Window grandparent;
Window *uncles = 0;
unsigned int nuncles;
Status ok =
XQueryTree(display, parent,
&root, &grandparent, &uncles, &nuncles);
XFree(uncles);
if (ok && grandparent == root)
return w; // Got it
}
w = parent;
}
return window; // Not found
}