--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/solaris/classes/sun/awt/X11/XProtocol.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2003-2005 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.awt.X11;
+
+import java.util.logging.*;
+
+import java.util.*;
+
+class XProtocol {
+    private final static Logger log = Logger.getLogger("sun.awt.X11.XProtocol");
+
+    private Map<XAtom, XAtomList> atomToList = new HashMap<XAtom, XAtomList>();
+    private Map<XAtom, Long> atomToAnchor = new HashMap<XAtom, Long>();
+
+    /*
+     * Temporary error handler that ensures that we know if
+     * XChangeProperty succeeded or not.
+     */
+    static XToolkit.XErrorHandler VerifyChangePropertyHandler = new XToolkit.XErrorHandler() {
+            public int handleError(long display, XErrorEvent err) {
+                XToolkit.XERROR_SAVE(err);
+                if (err.get_request_code() == XlibWrapper.X_ChangeProperty) {
+                    return 0;
+                } else {
+                    return XToolkit.SAVED_ERROR_HANDLER(display, err);
+                }
+            }
+        };
+    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;
+                log.log(Level.FINE, "{0}:{1} supports {2}", new Object[] {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) {
+        Long val = atomToAnchor.get(anchorProp);
+        if (val != null) {
+            return val.longValue();
+        }
+        long res = checkAnchorImpl(anchorProp, anchorType);
+        atomToAnchor.put(anchorProp, res);
+        return res;
+    }
+    public long checkAnchor(XAtom anchorProp, XAtom anchorType) {
+        return checkAnchor(anchorProp, anchorType.getAtom());
+    }
+
+}