/*
 * Copyright (c) 2004, 2017, 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.windows;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Insets;
import java.awt.Point;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

/* !!!! WARNING !!!!
 * This class has to be in sync with
 * src/solaris/classes/sun/awt/windows/ThemeReader.java
 * while we continue to build WinL&F on solaris
 */


Implements Theme Support for Windows XP.
Author:Sergey Salishev, Bino George, Igor Kushnirskiy
/** * Implements Theme Support for Windows XP. * * @author Sergey Salishev * @author Bino George * @author Igor Kushnirskiy */
public final class ThemeReader { private static final Map<String, Long> widgetToTheme = new HashMap<>(); // lock for the cache // reading should be done with readLock // writing with writeLock private static final ReadWriteLock readWriteLock = new ReentrantReadWriteLock(); private static final Lock readLock = readWriteLock.readLock(); private static final Lock writeLock = readWriteLock.writeLock(); private static volatile boolean valid = false; private static volatile boolean isThemed; static volatile boolean xpStyleEnabled; static void flush() { // Could be called on Toolkit thread, so do not try to acquire locks // to avoid deadlock with theme initialization valid = false; } private static native boolean initThemes(); public static boolean isThemed() { writeLock.lock(); try { isThemed = initThemes(); return isThemed; } finally { writeLock.unlock(); } } public static boolean isXPStyleEnabled() { return xpStyleEnabled; } // this should be called only with writeLock held private static Long getThemeImpl(String widget) { Long theme = widgetToTheme.get(widget); if (theme == null) { int i = widget.indexOf("::"); if (i > 0) { // We're using the syntax "subAppName::controlName" here, as used by msstyles. // See documentation for SetWindowTheme on MSDN. setWindowTheme(widget.substring(0, i)); theme = openTheme(widget.substring(i+2)); setWindowTheme(null); } else { theme = openTheme(widget); } widgetToTheme.put(widget, theme); } return theme; } // returns theme value // this method should be invoked with readLock locked private static Long getTheme(String widget) { if (!isThemed) { throw new IllegalStateException("Themes are not loaded"); } if (!valid) { readLock.unlock(); writeLock.lock(); try { if (!valid) { // Close old themes. for (Long value : widgetToTheme.values()) { closeTheme(value); } widgetToTheme.clear(); valid = true; } } finally { readLock.lock(); writeLock.unlock(); } } // mostly copied from the javadoc for ReentrantReadWriteLock Long theme = widgetToTheme.get(widget); if (theme == null) { readLock.unlock(); writeLock.lock(); try { theme = getThemeImpl(widget); } finally { readLock.lock(); writeLock.unlock();// Unlock write, still hold read } } return theme; } private static native void paintBackground(int[] buffer, long theme, int part, int state, int x, int y, int w, int h, int stride); public static void paintBackground(int[] buffer, String widget, int part, int state, int x, int y, int w, int h, int stride) { readLock.lock(); try { paintBackground(buffer, getTheme(widget), part, state, x, y, w, h, stride); } finally { readLock.unlock(); } } private static native Insets getThemeMargins(long theme, int part, int state, int marginType); public static Insets getThemeMargins(String widget, int part, int state, int marginType) { readLock.lock(); try { return getThemeMargins(getTheme(widget), part, state, marginType); } finally { readLock.unlock(); } } private static native boolean isThemePartDefined(long theme, int part, int state); public static boolean isThemePartDefined(String widget, int part, int state) { readLock.lock(); try { return isThemePartDefined(getTheme(widget), part, state); } finally { readLock.unlock(); } } private static native Color getColor(long theme, int part, int state, int property); public static Color getColor(String widget, int part, int state, int property) { readLock.lock(); try { return getColor(getTheme(widget), part, state, property); } finally { readLock.unlock(); } } private static native int getInt(long theme, int part, int state, int property); public static int getInt(String widget, int part, int state, int property) { readLock.lock(); try { return getInt(getTheme(widget), part, state, property); } finally { readLock.unlock(); } } private static native int getEnum(long theme, int part, int state, int property); public static int getEnum(String widget, int part, int state, int property) { readLock.lock(); try { return getEnum(getTheme(widget), part, state, property); } finally { readLock.unlock(); } } private static native boolean getBoolean(long theme, int part, int state, int property); public static boolean getBoolean(String widget, int part, int state, int property) { readLock.lock(); try { return getBoolean(getTheme(widget), part, state, property); } finally { readLock.unlock(); } } private static native boolean getSysBoolean(long theme, int property); public static boolean getSysBoolean(String widget, int property) { readLock.lock(); try { return getSysBoolean(getTheme(widget), property); } finally { readLock.unlock(); } } private static native Point getPoint(long theme, int part, int state, int property); public static Point getPoint(String widget, int part, int state, int property) { readLock.lock(); try { return getPoint(getTheme(widget), part, state, property); } finally { readLock.unlock(); } } private static native Dimension getPosition(long theme, int part, int state, int property); public static Dimension getPosition(String widget, int part, int state, int property) { readLock.lock(); try { return getPosition(getTheme(widget), part,state,property); } finally { readLock.unlock(); } } private static native Dimension getPartSize(long theme, int part, int state); public static Dimension getPartSize(String widget, int part, int state) { readLock.lock(); try { return getPartSize(getTheme(widget), part, state); } finally { readLock.unlock(); } } private static native long openTheme(String widget); private static native void closeTheme(long theme); private static native void setWindowTheme(String subAppName); private static native long getThemeTransitionDuration(long theme, int part, int stateFrom, int stateTo, int propId); public static long getThemeTransitionDuration(String widget, int part, int stateFrom, int stateTo, int propId) { readLock.lock(); try { return getThemeTransitionDuration(getTheme(widget), part, stateFrom, stateTo, propId); } finally { readLock.unlock(); } } public static native boolean isGetThemeTransitionDurationDefined(); private static native Insets getThemeBackgroundContentMargins(long theme, int part, int state, int boundingWidth, int boundingHeight); public static Insets getThemeBackgroundContentMargins(String widget, int part, int state, int boundingWidth, int boundingHeight) { readLock.lock(); try { return getThemeBackgroundContentMargins(getTheme(widget), part, state, boundingWidth, boundingHeight); } finally { readLock.unlock(); } } }