/*
* Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.awt.X11;
import sun.util.logging.PlatformLogger;
import java.util.*;
class XProtocol {
private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.X11.XProtocol");
private Map<XAtom, XAtomList> atomToList = new HashMap<XAtom, XAtomList>();
private Map<XAtom, Long> atomToAnchor = new HashMap<XAtom, Long>();
volatile boolean firstCheck = true;
/*
* Check that that the list of protocols specified by WM in property
* named LIST_NAME on the root window contains protocol PROTO.
*/
boolean checkProtocol(XAtom listName, XAtom protocol) {
XAtomList protocols = atomToList.get(listName);
if (protocols != null) {
return protocols.contains(protocol);
}
protocols = listName.getAtomListPropertyList(XToolkit.getDefaultRootWindow());
atomToList.put(listName, protocols);
try {
return protocols.contains(protocol);
} finally {
if (firstCheck) {
firstCheck = false;
if (log.isLoggable(PlatformLogger.Level.FINE)) {
log.fine("{0}:{1} supports {2}", this, listName, protocols);
}
}
}
}
/*
* Check for anchor_prop(anchor_type) on root, take the value as the
* window id and check if that window exists and has anchor_prop(anchor_type)
* with the same value (i.e. pointing back to self).
*
* Returns the anchor window, as some WM may put interesting stuff in
* its properties (e.g. sawfish).
*/
long checkAnchorImpl(XAtom anchorProp, long anchorType) {
long root_xref, self_xref;
XToolkit.awtLock();
try {
root_xref = anchorProp.get32Property(XToolkit.getDefaultRootWindow(),
anchorType);
} finally {
XToolkit.awtUnlock();
}
if (root_xref == 0) {
return 0;
}
self_xref = anchorProp.get32Property(root_xref, anchorType);
if (self_xref != root_xref) {
return 0;
}
return self_xref;
}
public long checkAnchor(XAtom anchorProp, long anchorType) {
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