ed6c7e4e03
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@1000 a1c6a512-1295-4272-9138-f99709370657
126 lines
5.1 KiB
C
126 lines
5.1 KiB
C
/*****************************************************************************/
|
|
/** Copyright 1991 by Andreas Stolcke **/
|
|
/** Copyright 1990 by Solbourne Computer Inc. **/
|
|
/** Longmont, Colorado **/
|
|
/** **/
|
|
/** 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 permis- **/
|
|
/** sion notice appear in supporting documentation, and that the **/
|
|
/** name of Solbourne not be used in advertising **/
|
|
/** in publicity pertaining to distribution of the software without **/
|
|
/** specific, written prior permission. **/
|
|
/** **/
|
|
/** ANDREAS STOLCKE AND SOLBOURNE COMPUTER INC. DISCLAIMS ALL WARRANTIES **/
|
|
/** WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF **/
|
|
/** MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL ANDREAS STOLCKE **/
|
|
/** OR SOLBOURNE 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. **/
|
|
/*****************************************************************************/
|
|
/*
|
|
* vroot.h -- Virtual Root Window handling header file
|
|
*
|
|
* This header file redefines the X11 macros RootWindow and DefaultRootWindow,
|
|
* making them look for a virtual root window as provided by certain `virtual'
|
|
* window managers like swm and tvtwm. If none is found, the ordinary root
|
|
* window is returned, thus retaining backward compatibility with standard
|
|
* window managers.
|
|
* The function implementing the virtual root lookup remembers the result of
|
|
* its last invocation to avoid overhead in the case of repeated calls
|
|
* on the same display and screen arguments.
|
|
* The lookup code itself is taken from Tom LaStrange's ssetroot program.
|
|
*
|
|
* Most simple root window changing X programs can be converted to using
|
|
* virtual roots by just including
|
|
*
|
|
* #include <X11/vroot.h>
|
|
*
|
|
* after all the X11 header files. It has been tested on such popular
|
|
* X clients as xphoon, xfroot, xloadimage, and xaqua.
|
|
* It also works with the core clients xprop, xwininfo, xwd, and editres
|
|
* (and is necessary to get those clients working under tvtwm).
|
|
* It does NOT work with xsetroot; get the xsetroot replacement included in
|
|
* the tvtwm distribution instead.
|
|
*
|
|
* Andreas Stolcke <stolcke@ICSI.Berkeley.EDU>, 9/7/90
|
|
* - replaced all NULL's with properly cast 0's, 5/6/91
|
|
* - free children list (suggested by Mark Martin <mmm@cetia.fr>), 5/16/91
|
|
* - include X11/Xlib.h and support RootWindowOfScreen, too 9/17/91
|
|
*/
|
|
|
|
#ifndef _VROOT_H_
|
|
#define _VROOT_H_
|
|
|
|
#if !defined(lint) && !defined(SABER)
|
|
static const char vroot_rcsid[] = "#Id: vroot.h,v 1.4 1991/09/30 19:23:16 stolcke Exp stolcke #";
|
|
#endif
|
|
|
|
#include <X11/X.h>
|
|
#include <X11/Xatom.h>
|
|
#include <X11/Xlib.h>
|
|
|
|
static Window
|
|
#ifdef __STDC__ /* ANSIfication added by jwz, to avoid superfluous warnings. */
|
|
VirtualRootWindowOfScreen(Screen *screen)
|
|
#else /* !__STDC__ */
|
|
VirtualRootWindowOfScreen(screen) Screen *screen;
|
|
#endif /* !__STDC__ */
|
|
{
|
|
static Screen *save_screen = (Screen *)0;
|
|
static Window root = (Window)0;
|
|
|
|
if (screen != save_screen) {
|
|
Display *dpy = DisplayOfScreen(screen);
|
|
Atom __SWM_VROOT = None;
|
|
unsigned int i;
|
|
Window rootReturn, parentReturn, *children;
|
|
unsigned int numChildren;
|
|
|
|
root = RootWindowOfScreen(screen);
|
|
|
|
/* go look for a virtual root */
|
|
__SWM_VROOT = XInternAtom(dpy, "__SWM_VROOT", False);
|
|
if (XQueryTree(dpy, root, &rootReturn, &parentReturn,
|
|
&children, &numChildren)) {
|
|
for (i = 0; i < numChildren; i++) {
|
|
Atom actual_type;
|
|
int actual_format;
|
|
unsigned long nitems, bytesafter;
|
|
Window *newRoot = (Window *)0;
|
|
|
|
if (XGetWindowProperty(dpy, children[i],
|
|
__SWM_VROOT, 0, 1, False, XA_WINDOW,
|
|
&actual_type, &actual_format,
|
|
&nitems, &bytesafter,
|
|
(unsigned char **) &newRoot) == Success
|
|
&& newRoot) {
|
|
root = *newRoot;
|
|
break;
|
|
}
|
|
}
|
|
if (children)
|
|
XFree((char *)children);
|
|
}
|
|
|
|
save_screen = screen;
|
|
}
|
|
|
|
return root;
|
|
}
|
|
|
|
#undef RootWindowOfScreen
|
|
#define RootWindowOfScreen(s) VirtualRootWindowOfScreen(s)
|
|
|
|
#undef RootWindow
|
|
#define RootWindow(dpy,screen) VirtualRootWindowOfScreen(ScreenOfDisplay(dpy,screen))
|
|
|
|
#undef DefaultRootWindow
|
|
#define DefaultRootWindow(dpy) VirtualRootWindowOfScreen(DefaultScreenOfDisplay(dpy))
|
|
|
|
#endif /* _VROOT_H_ */
|