1 /* 2 * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.awt.X11; 27 28 import sun.util.logging.PlatformLogger; 29 30 import java.util.*; 31 32 class XProtocol { 33 private final static PlatformLogger log = PlatformLogger.getLogger("sun.awt.X11.XProtocol"); 34 35 private Map<XAtom, XAtomList> atomToList = new HashMap<XAtom, XAtomList>(); 36 private Map<XAtom, Long> atomToAnchor = new HashMap<XAtom, Long>(); 37 38 volatile boolean firstCheck = true; 39 /* 40 * Check that that the list of protocols specified by WM in property 41 * named LIST_NAME on the root window contains protocol PROTO. 42 */ 43 boolean checkProtocol(XAtom listName, XAtom protocol) { 44 XAtomList protocols = atomToList.get(listName); 45 46 if (protocols != null) { 47 return protocols.contains(protocol); 48 } 49 50 protocols = listName.getAtomListPropertyList(XToolkit.getDefaultRootWindow()); 51 atomToList.put(listName, protocols); 52 try { 53 return protocols.contains(protocol); 54 } finally { 55 if (firstCheck) { 56 firstCheck = false; 57 if (log.isLoggable(PlatformLogger.Level.FINE)) { 58 log.fine("{0}:{1} supports {2}", this, listName, protocols); 59 } 60 } 61 } 62 } 63 64 /* 65 * Check for anchor_prop(anchor_type) on root, take the value as the 66 * window id and check if that window exists and has anchor_prop(anchor_type) 67 * with the same value (i.e. pointing back to self). 68 * 69 * Returns the anchor window, as some WM may put interesting stuff in 70 * its properties (e.g. sawfish). 71 */ 72 long checkAnchorImpl(XAtom anchorProp, long anchorType) { 73 long root_xref, self_xref; 74 75 XToolkit.awtLock(); 76 try { 77 root_xref = anchorProp.get32Property(XToolkit.getDefaultRootWindow(), 78 anchorType); 79 } finally { 80 XToolkit.awtUnlock(); 81 } 82 if (root_xref == 0) { 83 return 0; 84 } 85 self_xref = anchorProp.get32Property(root_xref, anchorType); 86 if (self_xref != root_xref) { 87 return 0; 88 } 89 return self_xref; 90 } 91 public long checkAnchor(XAtom anchorProp, long anchorType) { 92 Long val = atomToAnchor.get(anchorProp); 93 if (val != null) { 94 return val.longValue(); 95 } 96 long res = checkAnchorImpl(anchorProp, anchorType); 97 atomToAnchor.put(anchorProp, res); 98 return res; 99 } 100 public long checkAnchor(XAtom anchorProp, XAtom anchorType) { 101 return checkAnchor(anchorProp, anchorType.getAtom()); 102 } 103 104 }