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/*
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* Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.awt.X11;
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import java.util.logging.*;
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import java.util.*;
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class XProtocol {
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private final static Logger log = Logger.getLogger("sun.awt.X11.XProtocol");
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private Map<XAtom, XAtomList> atomToList = new HashMap<XAtom, XAtomList>();
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private Map<XAtom, Long> atomToAnchor = new HashMap<XAtom, Long>();
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/*
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* Temporary error handler that ensures that we know if
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* XChangeProperty succeeded or not.
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*/
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static XToolkit.XErrorHandler VerifyChangePropertyHandler = new XToolkit.XErrorHandler() {
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public int handleError(long display, XErrorEvent err) {
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XToolkit.XERROR_SAVE(err);
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if (err.get_request_code() == XlibWrapper.X_ChangeProperty) {
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return 0;
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} else {
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return XToolkit.SAVED_ERROR_HANDLER(display, err);
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}
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}
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};
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volatile boolean firstCheck = true;
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/*
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* Check that that the list of protocols specified by WM in property
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* named LIST_NAME on the root window contains protocol PROTO.
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*/
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boolean checkProtocol(XAtom listName, XAtom protocol) {
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XAtomList protocols = atomToList.get(listName);
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if (protocols != null) {
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return protocols.contains(protocol);
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}
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protocols = listName.getAtomListPropertyList(XToolkit.getDefaultRootWindow());
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atomToList.put(listName, protocols);
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try {
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return protocols.contains(protocol);
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} finally {
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if (firstCheck) {
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firstCheck = false;
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log.log(Level.FINE, "{0}:{1} supports {2}", new Object[] {this, listName, protocols});
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}
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}
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}
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/*
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* Check for anchor_prop(anchor_type) on root, take the value as the
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* window id and check if that window exists and has anchor_prop(anchor_type)
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* with the same value (i.e. pointing back to self).
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*
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* Returns the anchor window, as some WM may put interesting stuff in
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* its properties (e.g. sawfish).
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*/
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long checkAnchorImpl(XAtom anchorProp, long anchorType) {
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long root_xref, self_xref;
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XToolkit.awtLock();
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try {
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root_xref = anchorProp.get32Property(XToolkit.getDefaultRootWindow(),
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anchorType);
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} finally {
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XToolkit.awtUnlock();
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}
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if (root_xref == 0) {
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return 0;
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}
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self_xref = anchorProp.get32Property(root_xref, anchorType);
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if (self_xref != root_xref) {
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return 0;
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}
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return self_xref;
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}
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public long checkAnchor(XAtom anchorProp, long anchorType) {
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Long val = atomToAnchor.get(anchorProp);
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if (val != null) {
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return val.longValue();
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}
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long res = checkAnchorImpl(anchorProp, anchorType);
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atomToAnchor.put(anchorProp, res);
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return res;
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}
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public long checkAnchor(XAtom anchorProp, XAtom anchorType) {
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return checkAnchor(anchorProp, anchorType.getAtom());
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}
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}
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