J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.X11; |
| 27 | |
| 28 | import java.util.*; |
| 29 | |
| 30 | /** |
| 31 | * Implements abstract X window property caching mechanism. The |
| 32 | * caching is performed using storeCache method, the cached data can |
| 33 | * be retrieved using getCacheEntry method. |
| 34 | * |
| 35 | * NOTE: current caching is disabled because of the big variate of |
| 36 | * uncovered access to properties/changes of properties. Once the |
| 37 | * access to properites is rewritten using general mechanisms, caching |
| 38 | * will be enabled. |
| 39 | */ |
| 40 | public class XPropertyCache { |
| 41 | |
| 42 | static class PropertyCacheEntry { |
| 43 | private final int format; |
| 44 | private final int numberOfItems; |
| 45 | private final long bytesAfter; |
| 46 | private final long data; |
| 47 | private final int dataLength; |
| 48 | public PropertyCacheEntry(int format, int numberOfItems, long bytesAfter, long data, int dataLength) { |
| 49 | this.format = format; |
| 50 | this.numberOfItems = numberOfItems; |
| 51 | this.bytesAfter = bytesAfter; |
| 52 | this.data = XlibWrapper.unsafe.allocateMemory(dataLength); |
| 53 | this.dataLength = dataLength; |
| 54 | XlibWrapper.memcpy(this.data, data, dataLength); |
| 55 | } |
| 56 | |
| 57 | public int getFormat() { |
| 58 | return format; |
| 59 | } |
| 60 | |
| 61 | public int getNumberOfItems() { |
| 62 | return numberOfItems; |
| 63 | } |
| 64 | |
| 65 | public long getBytesAfter() { |
| 66 | return bytesAfter; |
| 67 | } |
| 68 | |
| 69 | public long getData() { |
| 70 | return data; |
| 71 | } |
| 72 | |
| 73 | public int getDataLength() { |
| 74 | return dataLength; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | private static Map<Long, Map<XAtom, PropertyCacheEntry>> windowToMap = new HashMap<Long, Map<XAtom, PropertyCacheEntry>>(); |
| 79 | |
| 80 | public static boolean isCached(long window, XAtom property) { |
| 81 | Map<XAtom, PropertyCacheEntry> entryMap = windowToMap.get(window); |
| 82 | if (entryMap != null) { |
| 83 | return entryMap.containsKey(property); |
| 84 | } else { |
| 85 | return false; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | public static PropertyCacheEntry getCacheEntry(long window, XAtom property) { |
| 90 | Map<XAtom, PropertyCacheEntry> entryMap = windowToMap.get(window); |
| 91 | if (entryMap != null) { |
| 92 | return entryMap.get(property); |
| 93 | } else { |
| 94 | return null; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | public static void storeCache(PropertyCacheEntry entry, long window, XAtom property) { |
| 99 | Map<XAtom, PropertyCacheEntry> entryMap = windowToMap.get(window); |
| 100 | if (entryMap == null) { |
| 101 | entryMap = new HashMap<XAtom, PropertyCacheEntry>(); |
| 102 | windowToMap.put(window, entryMap); |
| 103 | } |
| 104 | entryMap.put(property, entry); |
| 105 | } |
| 106 | |
| 107 | public static void clearCache(long window) { |
| 108 | windowToMap.remove(window); |
| 109 | } |
| 110 | |
| 111 | public static void clearCache(long window, XAtom property) { |
| 112 | Map<XAtom, PropertyCacheEntry> entryMap = windowToMap.get(window); |
| 113 | if (entryMap != null) { |
| 114 | entryMap.remove(property); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | public static boolean isCachingSupported() { |
| 119 | // Currently - unsupported |
| 120 | return false; |
| 121 | } |
| 122 | } |