+++ /dev/null
-/*****************************************************************************/
-/** 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
- *
- * Jamie Zawinski <jwz@jwz.org>, 28-Apr-1997
- * - use ANSI C
- *
- * Jamie Zawinski <jwz@jwz.org>, 3-Sep-2003
- * - if the environment variable "XSCREENSAVER_WINDOW" is set, use that
- * as the root window instead of searching for __SWM_VROOT.
- */
-
-#ifndef _VROOT_H_
-#define _VROOT_H_
-#define _XSCREENSAVER_VROOT_H_
-
-#if !defined(lint) && !defined(SABER)
-static const char vroot_rcsid[] =
- "#Id: vroot.h,v 1.5 2003/09/04 01:04:38 jwz Exp #" "\n"
- "#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;
- int i;
- Window rootReturn, parentReturn, *children;
- unsigned int numChildren;
-
- /* first check for a hex or decimal window ID in the environment */
- const char *xss_id = getenv("XSCREENSAVER_WINDOW");
- if (xss_id && *xss_id) {
- unsigned long id = 0;
- char c;
- if (1 == sscanf(xss_id, " 0x%lx %c", &id, &c) ||
- 1 == sscanf(xss_id, " %lu %c", &id, &c)) {
- root = (Window) id;
- save_screen = screen;
- return root;
- }
- }
-
- 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_ */
projects / xfishtank.git / blobdiff