| /* |
| * Copyright (c) 2003, 2008, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.awt.X11; |
| |
| import java.util.*; |
| import sun.misc.Unsafe; |
| |
| public class WindowPropertyGetter { |
| private static Unsafe unsafe = XlibWrapper.unsafe; |
| private final long actual_type = unsafe.allocateMemory(8); |
| private final long actual_format = unsafe.allocateMemory(4); |
| private final long nitems_ptr = unsafe.allocateMemory(8); |
| private final long bytes_after = unsafe.allocateMemory(8); |
| private final long data = unsafe.allocateMemory(8); |
| private final long window; |
| private final XAtom property; |
| private final long offset; |
| private final long length; |
| private final boolean auto_delete; |
| private final long type; |
| private boolean executed = false; |
| public WindowPropertyGetter(long window, XAtom property, long offset, |
| long length, boolean auto_delete, long type) |
| { |
| if (property.getAtom() == 0) { |
| throw new IllegalArgumentException("Property ATOM should be initialized first:" + property); |
| } |
| // Zero is AnyPropertyType. |
| // if (type == 0) { |
| // throw new IllegalArgumentException("Type ATOM shouldn't be zero"); |
| // } |
| if (window == 0) { |
| throw new IllegalArgumentException("Window must not be zero"); |
| } |
| this.window = window; |
| this.property = property; |
| this.offset = offset; |
| this.length = length; |
| this.auto_delete = auto_delete; |
| this.type = type; |
| |
| Native.putLong(data, 0); |
| sun.java2d.Disposer.addRecord(this, disposer = new UnsafeXDisposerRecord("WindowPropertyGetter", new long[] {actual_type, |
| actual_format, nitems_ptr, bytes_after}, new long[] {data})); |
| } |
| UnsafeXDisposerRecord disposer; |
| public WindowPropertyGetter(long window, XAtom property, long offset, |
| long length, boolean auto_delete, XAtom type) |
| { |
| this(window, property, offset, length, auto_delete, type.getAtom()); |
| } |
| public int execute() { |
| return execute(null); |
| } |
| public int execute(XErrorHandler errorHandler) { |
| |
| XToolkit.awtLock(); |
| try { |
| if (isDisposed()) { |
| throw new IllegalStateException("Disposed"); |
| } |
| if (executed) { |
| throw new IllegalStateException("Already executed"); |
| } |
| executed = true; |
| |
| if (isCachingSupported() && isCached()) { |
| readFromCache(); |
| return XConstants.Success; |
| } |
| |
| // Fix for performance problem - IgnodeBadWindowHandler is |
| // used too much without reason, just ignore it |
| if (errorHandler instanceof XErrorHandler.IgnoreBadWindowHandler) { |
| errorHandler = null; |
| } |
| |
| if (errorHandler != null) { |
| XToolkit.WITH_XERROR_HANDLER(errorHandler); |
| } |
| Native.putLong(data, 0); |
| int status = XlibWrapper.XGetWindowProperty(XToolkit.getDisplay(), window, property.getAtom(), |
| offset, length, (auto_delete?1:0), type, |
| actual_type, actual_format, nitems_ptr, |
| bytes_after, data); |
| if (isCachingSupported() && status == XConstants.Success && getData() != 0 && isCacheableProperty(property)) { |
| // Property has some data, we cache them |
| cacheProperty(); |
| } |
| |
| if (errorHandler != null) { |
| XToolkit.RESTORE_XERROR_HANDLER(); |
| } |
| return status; |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| } |
| |
| public boolean isExecuted() { |
| return executed; |
| } |
| |
| public boolean isDisposed() { |
| return disposer.disposed; |
| } |
| |
| public int getActualFormat() { |
| if (isDisposed()) { |
| throw new IllegalStateException("Disposed"); |
| } |
| if (!executed) { |
| throw new IllegalStateException("Not executed"); |
| } |
| return unsafe.getInt(actual_format); |
| } |
| public long getActualType() { |
| if (isDisposed()) { |
| throw new IllegalStateException("Disposed"); |
| } |
| if (!executed) { |
| throw new IllegalStateException("Not executed"); |
| } |
| return XAtom.getAtom(actual_type); |
| } |
| public int getNumberOfItems() { |
| if (isDisposed()) { |
| throw new IllegalStateException("Disposed"); |
| } |
| if (!executed) { |
| throw new IllegalStateException("Not executed"); |
| } |
| return (int)Native.getLong(nitems_ptr); |
| } |
| public long getData() { |
| if (isDisposed()) { |
| throw new IllegalStateException("Disposed"); |
| } |
| return Native.getLong(data); |
| } |
| public long getBytesAfter() { |
| if (isDisposed()) { |
| throw new IllegalStateException("Disposed"); |
| } |
| if (!executed) { |
| throw new IllegalStateException("Not executed"); |
| } |
| return Native.getLong(bytes_after); |
| } |
| public void dispose() { |
| XToolkit.awtLock(); |
| try { |
| if (isDisposed()) { |
| return; |
| } |
| disposer.dispose(); |
| } finally { |
| XToolkit.awtUnlock(); |
| } |
| } |
| |
| static boolean isCachingSupported() { |
| return XPropertyCache.isCachingSupported(); |
| } |
| |
| static Set<XAtom> cacheableProperties = new HashSet<XAtom>(Arrays.asList(new XAtom[] { |
| XAtom.get("_NET_WM_STATE"), XAtom.get("WM_STATE"), XAtom.get("_MOTIF_WM_HINTS")})); |
| |
| static boolean isCacheableProperty(XAtom property) { |
| return cacheableProperties.contains(property); |
| } |
| |
| boolean isCached() { |
| return XPropertyCache.isCached(window, property); |
| } |
| |
| int getDataLength() { |
| return getActualFormat() / 8 * getNumberOfItems(); |
| } |
| |
| void readFromCache() { |
| property.putAtom(actual_type); |
| XPropertyCache.PropertyCacheEntry entry = XPropertyCache.getCacheEntry(window, property); |
| Native.putInt(actual_format, entry.getFormat()); |
| Native.putLong(nitems_ptr, entry.getNumberOfItems()); |
| Native.putLong(bytes_after, entry.getBytesAfter()); |
| Native.putLong(data, unsafe.allocateMemory(getDataLength())); |
| XlibWrapper.memcpy(getData(), entry.getData(), getDataLength()); |
| } |
| |
| void cacheProperty() { |
| XPropertyCache.storeCache( |
| new XPropertyCache.PropertyCacheEntry(getActualFormat(), |
| getNumberOfItems(), |
| getBytesAfter(), |
| getData(), |
| getDataLength()), |
| window, |
| property); |
| } |
| |
| } |