| /* |
| * 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()); |
| } |
| |
| } |