src/java.desktop/windows/classes/sun/awt/windows/ThemeReader.java - platform/libcore - Git at Google

 /*
  * 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
  * @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();
         }
     }
 }
	/*
	* 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
	* @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();
	}
	}
	}