org.eclipse.tips.ui/src/org/eclipse/tips/ui/internal/util/ResourceManager.java - platform/eclipse.platform.ua - Git at Google

 /*******************************************************************************
  * Copyright (c) 2011, 2019 Google, Inc. and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *    Google, Inc. - initial API and implementation
  *******************************************************************************/
 package org.eclipse.tips.ui.internal.util;

 import java.io.File;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.HashMap;
 import java.util.Map;

 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.resource.CompositeImageDescriptor;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.graphics.Rectangle;
 import org.osgi.framework.Bundle;

 /**
  * Utility class for managing OS resources associated with SWT/JFace controls
  * such as colors, fonts, images, etc.
  *
  * !!! IMPORTANT !!! Application code must explicitly invoke the
  * <code>dispose()</code> method to release the operating system resources
  * managed by cached objects when those objects and OS resources are no longer
  * needed (e.g. on application shutdown)
  *
  * This class may be freely distributed as part of any application or plugin.
  * <p>
  *
  * @author scheglov_ke
  * @author Dan Rubel
  */
 public class ResourceManager extends SWTResourceManager {
 	////////////////////////////////////////////////////////////////////////////
 	//
 	// Image
 	//
 	////////////////////////////////////////////////////////////////////////////
 	private static Map<ImageDescriptor, Image> m_descriptorImageMap = new HashMap<>();

 	/**
 	 * Returns an {@link ImageDescriptor} stored in the file at the specified
 	 * path relative to the specified class.
 	 *
 	 * @param clazz
 	 *            the {@link Class} relative to which to find the image
 	 *            descriptor.
 	 * @param path
 	 *            the path to the image file.
 	 * @return the {@link ImageDescriptor} stored in the file at the specified
 	 *         path.
 	 */
 	public static ImageDescriptor getImageDescriptor(Class<?> clazz, String path) {
 		return ImageDescriptor.createFromFile(clazz, path);
 	}

 	/**
 	 * Returns an {@link ImageDescriptor} stored in the file at the specified
 	 * path.
 	 *
 	 * @param path
 	 *            the path to the image file.
 	 * @return the {@link ImageDescriptor} stored in the file at the specified
 	 *         path.
 	 */
 	public static ImageDescriptor getImageDescriptor(String path) {
 		try {
 			return ImageDescriptor.createFromURL(new File(path).toURI().toURL());
 		} catch (MalformedURLException e) {
 			return null;
 		}
 	}

 	/**
 	 * Returns an {@link Image} based on the specified {@link ImageDescriptor}.
 	 *
 	 * @param descriptor
 	 *            the {@link ImageDescriptor} for the {@link Image}.
 	 * @return the {@link Image} based on the specified {@link ImageDescriptor}.
 	 */
 	public static Image getImage(ImageDescriptor descriptor) {
 		if (descriptor == null) {
 			return null;
 		}
 		Image image = m_descriptorImageMap.get(descriptor);
 		if (image == null) {
 			image = descriptor.createImage();
 			m_descriptorImageMap.put(descriptor, image);
 		}
 		return image;
 	}

 	/**
 	 * Maps images to decorated images.
 	 */
 	@SuppressWarnings("unchecked")
 	private static Map<Image, Map<Image, Image>>[] m_decoratedImageMap = new Map[LAST_CORNER_KEY];

 	/**
 	 * Returns an {@link Image} composed of a base image decorated by another
 	 * image.
 	 *
 	 * @param baseImage
 	 *            the base {@link Image} that should be decorated.
 	 * @param decorator
 	 *            the {@link Image} to decorate the base image.
 	 * @return {@link Image} The resulting decorated image.
 	 */
 	public static Image decorateImage(Image baseImage, Image decorator) {
 		return decorateImage(baseImage, decorator, BOTTOM_RIGHT);
 	}

 	/**
 	 * Returns an {@link Image} composed of a base image decorated by another
 	 * image.
 	 *
 	 * @param baseImage
 	 *            the base {@link Image} that should be decorated.
 	 * @param decorator
 	 *            the {@link Image} to decorate the base image.
 	 * @param corner
 	 *            the corner to place decorator image.
 	 * @return the resulting decorated {@link Image}.
 	 */
 	public static Image decorateImage(final Image baseImage, final Image decorator, final int corner) {
 		if (corner <= 0 || corner >= LAST_CORNER_KEY) {
 			throw new IllegalArgumentException(Messages.ResourceManager_0);
 		}
 		Map<Image, Map<Image, Image>> cornerDecoratedImageMap = m_decoratedImageMap[corner];
 		if (cornerDecoratedImageMap == null) {
 			cornerDecoratedImageMap = new HashMap<>();
 			m_decoratedImageMap[corner] = cornerDecoratedImageMap;
 		}
 		Map<Image, Image> decoratedMap = cornerDecoratedImageMap.get(baseImage);
 		if (decoratedMap == null) {
 			decoratedMap = new HashMap<>();
 			cornerDecoratedImageMap.put(baseImage, decoratedMap);
 		}
 		//
 		Image result = decoratedMap.get(decorator);
 		if (result == null) {
 			final Rectangle bib = baseImage.getBounds();
 			final Rectangle dib = decorator.getBounds();
 			final Point baseImageSize = new Point(bib.width, bib.height);
 			CompositeImageDescriptor compositImageDesc = new CompositeImageDescriptor() {
 				@Override
 				protected void drawCompositeImage(int width, int height) {
 					drawImage(baseImage.getImageData(), 0, 0);
 					if (corner == TOP_LEFT) {
 						drawImage(decorator.getImageData(), 0, 0);
 					} else if (corner == TOP_RIGHT) {
 						drawImage(decorator.getImageData(), bib.width - dib.width, 0);
 					} else if (corner == BOTTOM_LEFT) {
 						drawImage(decorator.getImageData(), 0, bib.height - dib.height);
 					} else if (corner == BOTTOM_RIGHT) {
 						drawImage(decorator.getImageData(), bib.width - dib.width, bib.height - dib.height);
 					}
 				}

 				@Override
 				protected Point getSize() {
 					return baseImageSize;
 				}
 			};
 			//
 			result = compositImageDesc.createImage();
 			decoratedMap.put(decorator, result);
 		}
 		return result;
 	}

 	/**
 	 * Dispose all of the cached images.
 	 */
 	public static void disposeImages() {
 		SWTResourceManager.disposeImages();
 		// dispose ImageDescriptor images
 		{
 			for (Image image : m_descriptorImageMap.values()) {
 				image.dispose();
 			}
 			m_descriptorImageMap.clear();
 		}
 		// dispose decorated images
 		for (Map<Image, Map<Image, Image>> cornerDecoratedImageMap : m_decoratedImageMap) {
 			if (cornerDecoratedImageMap != null) {
 				for (Map<Image, Image> decoratedMap : cornerDecoratedImageMap.values()) {
 					for (Image image : decoratedMap.values()) {
 						image.dispose();
 					}
 					decoratedMap.clear();
 				}
 				cornerDecoratedImageMap.clear();
 			}
 		}
 		// dispose plugin images
 		{
 			for (Image image : m_URLImageMap.values()) {
 				image.dispose();
 			}
 			m_URLImageMap.clear();
 		}
 	}

 	////////////////////////////////////////////////////////////////////////////
 	//
 	// Plugin images support
 	//
 	////////////////////////////////////////////////////////////////////////////
 	/**
 	 * Maps URL to images.
 	 */
 	private static Map<String, Image> m_URLImageMap = new HashMap<>();

 	/**
 	 * Provider for plugin resources, used by WindowBuilder at design time.
 	 */
 	public interface PluginResourceProvider {
 		URL getEntry(String symbolicName, String path);
 	}

 	/**
 	 * Instance of {@link PluginResourceProvider}, used by WindowBuilder at
 	 * design time.
 	 */
 	private static PluginResourceProvider m_designTimePluginResourceProvider = null;

 	/**
 	 * Returns an {@link Image} based on a plugin and file path.
 	 *
 	 * @param plugin
 	 *            the plugin {@link Object} containing the image
 	 * @param name
 	 *            the path to the image within the plugin
 	 * @return the {@link Image} stored in the file at the specified path
 	 *
 	 * @deprecated Use {@link #getPluginImage(String, String)} instead.
 	 */
 	@Deprecated
 	public static Image getPluginImage(Object plugin, String name) {
 		try {
 			URL url = getPluginImageURL(plugin, name);
 			if (url != null) {
 				return getPluginImageFromUrl(url);
 			}
 		} catch (Throwable e) {
 			// Ignore any exceptions
 		}
 		return null;
 	}

 	/**
 	 * Returns an {@link Image} based on a {@link Bundle} and resource entry
 	 * path.
 	 *
 	 * @param symbolicName
 	 *            the symbolic name of the {@link Bundle}.
 	 * @param path
 	 *            the path of the resource entry.
 	 * @return the {@link Image} stored in the file at the specified path.
 	 */
 	public static Image getPluginImage(String symbolicName, String path) {
 		try {
 			URL url = getPluginImageURL(symbolicName, path);
 			if (url != null) {
 				return getPluginImageFromUrl(url);
 			}
 		} catch (Throwable e) {
 			// Ignore any exceptions
 		}
 		return null;
 	}

 	/**
 	 * Returns an {@link Image} based on given {@link URL}.
 	 */
 	private static Image getPluginImageFromUrl(URL url) {
 		try {
 			String key = url.toExternalForm();
 			Image image = m_URLImageMap.get(key);
 			if (image == null) {
 				image = ImageDescriptor.createFromURL(url).createImage();
 				m_URLImageMap.put(key, image);
 			}
 			return image;
 		} catch (Throwable e) {
 			// Ignore any exceptions
 		}
 		return null;
 	}

 	/**
 	 * Returns an {@link ImageDescriptor} based on a plugin and file path.
 	 *
 	 * @param plugin
 	 *            the plugin {@link Object} containing the image.
 	 * @param name
 	 *            the path to th eimage within the plugin.
 	 * @return the {@link ImageDescriptor} stored in the file at the specified
 	 *         path.
 	 *
 	 * @deprecated Use {@link #getPluginImageDescriptor(String, String)}
 	 *             instead.
 	 */
 	@Deprecated
 	public static ImageDescriptor getPluginImageDescriptor(Object plugin, String name) {
 		try {
 			try {
 				URL url = getPluginImageURL(plugin, name);
 				return ImageDescriptor.createFromURL(url);
 			} catch (Throwable e) {
 				// Ignore any exceptions
 			}
 		} catch (Throwable e) {
 			// Ignore any exceptions
 		}
 		return null;
 	}

 	/**
 	 * Returns an {@link ImageDescriptor} based on a {@link Bundle} and resource
 	 * entry path.
 	 *
 	 * @param symbolicName
 	 *            the symbolic name of the {@link Bundle}.
 	 * @param path
 	 *            the path of the resource entry.
 	 * @return the {@link ImageDescriptor} based on a {@link Bundle} and
 	 *         resource entry path.
 	 */
 	public static ImageDescriptor getPluginImageDescriptor(String symbolicName, String path) {
 		try {
 			URL url = getPluginImageURL(symbolicName, path);
 			if (url != null) {
 				return ImageDescriptor.createFromURL(url);
 			}
 		} catch (Throwable e) {
 			// Ignore any exceptions
 		}
 		return null;
 	}

 	/**
 	 * Returns an {@link URL} based on a {@link Bundle} and resource entry path.
 	 */
 	private static URL getPluginImageURL(String symbolicName, String path) {
 		// try runtime plugins
 		{
 			Bundle bundle = Platform.getBundle(symbolicName);
 			if (bundle != null) {
 				return bundle.getEntry(path);
 			}
 		}
 		// try design time provider
 		if (m_designTimePluginResourceProvider != null) {
 			return m_designTimePluginResourceProvider.getEntry(symbolicName, path);
 		}
 		// no such resource
 		return null;
 	}

 	/**
 	 * Returns an {@link URL} based on a plugin and file path.
 	 *
 	 * @param plugin
 	 *            the plugin {@link Object} containing the file path.
 	 * @param name
 	 *            the file path.
 	 * @return the {@link URL} representing the file at the specified path.
 	 * @throws Exception
 	 */
 	private static URL getPluginImageURL(Object plugin, String name) throws Exception {
 		// try to work with 'plugin' as with OSGI BundleContext
 		try {
 			Class<?> BundleClass = Class.forName("org.osgi.framework.Bundle"); //$NON-NLS-1$
 			Class<?> BundleContextClass = Class.forName("org.osgi.framework.BundleContext"); //$NON-NLS-1$
 			if (BundleContextClass.isAssignableFrom(plugin.getClass())) {
 				Method getBundleMethod = BundleContextClass.getMethod("getBundle"); //$NON-NLS-1$
 				Object bundle = getBundleMethod.invoke(plugin);
 				//
 				Class<?> PathClass = Class.forName("org.eclipse.core.runtime.Path"); //$NON-NLS-1$
 				Constructor<?> pathConstructor = PathClass.getConstructor(String.class);
 				Object path = pathConstructor.newInstance(name);
 				//
 				Class<?> IPathClass = Class.forName("org.eclipse.core.runtime.IPath"); //$NON-NLS-1$
 				Class<?> PlatformClass = Class.forName("org.eclipse.core.runtime.Platform"); //$NON-NLS-1$
 				Method findMethod = PlatformClass.getMethod("find", BundleClass, IPathClass); //$NON-NLS-1$
 				return (URL) findMethod.invoke(null, bundle, path);
 			}
 		} catch (Throwable e) {
 			// Ignore any exceptions
 		}
 		// else work with 'plugin' as with usual Eclipse plugin
 		{
 			Class<?> PluginClass = Class.forName("org.eclipse.core.runtime.Plugin"); //$NON-NLS-1$
 			if (PluginClass.isAssignableFrom(plugin.getClass())) {
 				//
 				Class<?> PathClass = Class.forName("org.eclipse.core.runtime.Path"); //$NON-NLS-1$
 				Constructor<?> pathConstructor = PathClass.getConstructor(String.class);
 				Object path = pathConstructor.newInstance(name);
 				//
 				Class<?> IPathClass = Class.forName("org.eclipse.core.runtime.IPath"); //$NON-NLS-1$
 				Method findMethod = PluginClass.getMethod("find", IPathClass); //$NON-NLS-1$
 				return (URL) findMethod.invoke(plugin, path);
 			}
 		}
 		return null;
 	}

 	////////////////////////////////////////////////////////////////////////////
 	//
 	// General
 	//
 	////////////////////////////////////////////////////////////////////////////
 	/**
 	 * Dispose of cached objects and their underlying OS resources. This should
 	 * only be called when the cached objects are no longer needed (e.g. on
 	 * application shutdown).
 	 */
 	public static void dispose() {
 		disposeColors();
 		disposeFonts();
 		disposeImages();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2011, 2019 Google, Inc. and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Google, Inc. - initial API and implementation
	*******************************************************************************/
	package org.eclipse.tips.ui.internal.util;

	import java.io.File;
	import java.lang.reflect.Constructor;
	import java.lang.reflect.Method;
	import java.net.MalformedURLException;
	import java.net.URL;
	import java.util.HashMap;
	import java.util.Map;

	import org.eclipse.core.runtime.Platform;
	import org.eclipse.jface.resource.CompositeImageDescriptor;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.graphics.Rectangle;
	import org.osgi.framework.Bundle;

	/**
	* Utility class for managing OS resources associated with SWT/JFace controls
	* such as colors, fonts, images, etc.
	*
	* !!! IMPORTANT !!! Application code must explicitly invoke the
	* <code>dispose()</code> method to release the operating system resources
	* managed by cached objects when those objects and OS resources are no longer
	* needed (e.g. on application shutdown)
	*
	* This class may be freely distributed as part of any application or plugin.
	* <p>
	*
	* @author scheglov_ke
	* @author Dan Rubel
	*/
	public class ResourceManager extends SWTResourceManager {
	////////////////////////////////////////////////////////////////////////////
	//
	// Image
	//
	////////////////////////////////////////////////////////////////////////////
	private static Map<ImageDescriptor, Image> m_descriptorImageMap = new HashMap<>();

	/**
	* Returns an {@link ImageDescriptor} stored in the file at the specified
	* path relative to the specified class.
	*
	* @param clazz
	* the {@link Class} relative to which to find the image
	* descriptor.
	* @param path
	* the path to the image file.
	* @return the {@link ImageDescriptor} stored in the file at the specified
	* path.
	*/
	public static ImageDescriptor getImageDescriptor(Class<?> clazz, String path) {
	return ImageDescriptor.createFromFile(clazz, path);
	}

	/**
	* Returns an {@link ImageDescriptor} stored in the file at the specified
	* path.
	*
	* @param path
	* the path to the image file.
	* @return the {@link ImageDescriptor} stored in the file at the specified
	* path.
	*/
	public static ImageDescriptor getImageDescriptor(String path) {
	try {
	return ImageDescriptor.createFromURL(new File(path).toURI().toURL());
	} catch (MalformedURLException e) {
	return null;
	}
	}

	/**
	* Returns an {@link Image} based on the specified {@link ImageDescriptor}.
	*
	* @param descriptor
	* the {@link ImageDescriptor} for the {@link Image}.
	* @return the {@link Image} based on the specified {@link ImageDescriptor}.
	*/
	public static Image getImage(ImageDescriptor descriptor) {
	if (descriptor == null) {
	return null;
	}
	Image image = m_descriptorImageMap.get(descriptor);
	if (image == null) {
	image = descriptor.createImage();
	m_descriptorImageMap.put(descriptor, image);
	}
	return image;
	}

	/**
	* Maps images to decorated images.
	*/
	@SuppressWarnings("unchecked")
	private static Map<Image, Map<Image, Image>>[] m_decoratedImageMap = new Map[LAST_CORNER_KEY];

	/**
	* Returns an {@link Image} composed of a base image decorated by another
	* image.
	*
	* @param baseImage
	* the base {@link Image} that should be decorated.
	* @param decorator
	* the {@link Image} to decorate the base image.
	* @return {@link Image} The resulting decorated image.
	*/
	public static Image decorateImage(Image baseImage, Image decorator) {
	return decorateImage(baseImage, decorator, BOTTOM_RIGHT);
	}

	/**
	* Returns an {@link Image} composed of a base image decorated by another
	* image.
	*
	* @param baseImage
	* the base {@link Image} that should be decorated.
	* @param decorator
	* the {@link Image} to decorate the base image.
	* @param corner
	* the corner to place decorator image.
	* @return the resulting decorated {@link Image}.
	*/
	public static Image decorateImage(final Image baseImage, final Image decorator, final int corner) {
	if (corner <= 0 \|\| corner >= LAST_CORNER_KEY) {
	throw new IllegalArgumentException(Messages.ResourceManager_0);
	}
	Map<Image, Map<Image, Image>> cornerDecoratedImageMap = m_decoratedImageMap[corner];
	if (cornerDecoratedImageMap == null) {
	cornerDecoratedImageMap = new HashMap<>();
	m_decoratedImageMap[corner] = cornerDecoratedImageMap;
	}
	Map<Image, Image> decoratedMap = cornerDecoratedImageMap.get(baseImage);
	if (decoratedMap == null) {
	decoratedMap = new HashMap<>();
	cornerDecoratedImageMap.put(baseImage, decoratedMap);
	}
	//
	Image result = decoratedMap.get(decorator);
	if (result == null) {
	final Rectangle bib = baseImage.getBounds();
	final Rectangle dib = decorator.getBounds();
	final Point baseImageSize = new Point(bib.width, bib.height);
	CompositeImageDescriptor compositImageDesc = new CompositeImageDescriptor() {
	@Override
	protected void drawCompositeImage(int width, int height) {
	drawImage(baseImage.getImageData(), 0, 0);
	if (corner == TOP_LEFT) {
	drawImage(decorator.getImageData(), 0, 0);
	} else if (corner == TOP_RIGHT) {
	drawImage(decorator.getImageData(), bib.width - dib.width, 0);
	} else if (corner == BOTTOM_LEFT) {
	drawImage(decorator.getImageData(), 0, bib.height - dib.height);
	} else if (corner == BOTTOM_RIGHT) {
	drawImage(decorator.getImageData(), bib.width - dib.width, bib.height - dib.height);
	}
	}

	@Override
	protected Point getSize() {
	return baseImageSize;
	}
	};
	//
	result = compositImageDesc.createImage();
	decoratedMap.put(decorator, result);
	}
	return result;
	}

	/**
	* Dispose all of the cached images.
	*/
	public static void disposeImages() {
	SWTResourceManager.disposeImages();
	// dispose ImageDescriptor images
	{
	for (Image image : m_descriptorImageMap.values()) {
	image.dispose();
	}
	m_descriptorImageMap.clear();
	}
	// dispose decorated images
	for (Map<Image, Map<Image, Image>> cornerDecoratedImageMap : m_decoratedImageMap) {
	if (cornerDecoratedImageMap != null) {
	for (Map<Image, Image> decoratedMap : cornerDecoratedImageMap.values()) {
	for (Image image : decoratedMap.values()) {
	image.dispose();
	}
	decoratedMap.clear();
	}
	cornerDecoratedImageMap.clear();
	}
	}
	// dispose plugin images
	{
	for (Image image : m_URLImageMap.values()) {
	image.dispose();
	}
	m_URLImageMap.clear();
	}
	}

	////////////////////////////////////////////////////////////////////////////
	//
	// Plugin images support
	//
	////////////////////////////////////////////////////////////////////////////
	/**
	* Maps URL to images.
	*/
	private static Map<String, Image> m_URLImageMap = new HashMap<>();

	/**
	* Provider for plugin resources, used by WindowBuilder at design time.
	*/
	public interface PluginResourceProvider {
	URL getEntry(String symbolicName, String path);
	}

	/**
	* Instance of {@link PluginResourceProvider}, used by WindowBuilder at
	* design time.
	*/
	private static PluginResourceProvider m_designTimePluginResourceProvider = null;

	/**
	* Returns an {@link Image} based on a plugin and file path.
	*
	* @param plugin
	* the plugin {@link Object} containing the image
	* @param name
	* the path to the image within the plugin
	* @return the {@link Image} stored in the file at the specified path
	*
	* @deprecated Use {@link #getPluginImage(String, String)} instead.
	*/
	@Deprecated
	public static Image getPluginImage(Object plugin, String name) {
	try {
	URL url = getPluginImageURL(plugin, name);
	if (url != null) {
	return getPluginImageFromUrl(url);
	}
	} catch (Throwable e) {
	// Ignore any exceptions
	}
	return null;
	}

	/**
	* Returns an {@link Image} based on a {@link Bundle} and resource entry
	* path.
	*
	* @param symbolicName
	* the symbolic name of the {@link Bundle}.
	* @param path
	* the path of the resource entry.
	* @return the {@link Image} stored in the file at the specified path.
	*/
	public static Image getPluginImage(String symbolicName, String path) {
	try {
	URL url = getPluginImageURL(symbolicName, path);
	if (url != null) {
	return getPluginImageFromUrl(url);
	}
	} catch (Throwable e) {
	// Ignore any exceptions
	}
	return null;
	}

	/**
	* Returns an {@link Image} based on given {@link URL}.
	*/
	private static Image getPluginImageFromUrl(URL url) {
	try {
	String key = url.toExternalForm();
	Image image = m_URLImageMap.get(key);
	if (image == null) {
	image = ImageDescriptor.createFromURL(url).createImage();
	m_URLImageMap.put(key, image);
	}
	return image;
	} catch (Throwable e) {
	// Ignore any exceptions
	}
	return null;
	}

	/**
	* Returns an {@link ImageDescriptor} based on a plugin and file path.
	*
	* @param plugin
	* the plugin {@link Object} containing the image.
	* @param name
	* the path to th eimage within the plugin.
	* @return the {@link ImageDescriptor} stored in the file at the specified
	* path.
	*
	* @deprecated Use {@link #getPluginImageDescriptor(String, String)}
	* instead.
	*/
	@Deprecated
	public static ImageDescriptor getPluginImageDescriptor(Object plugin, String name) {
	try {
	try {
	URL url = getPluginImageURL(plugin, name);
	return ImageDescriptor.createFromURL(url);
	} catch (Throwable e) {
	// Ignore any exceptions
	}
	} catch (Throwable e) {
	// Ignore any exceptions
	}
	return null;
	}

	/**
	* Returns an {@link ImageDescriptor} based on a {@link Bundle} and resource
	* entry path.
	*
	* @param symbolicName
	* the symbolic name of the {@link Bundle}.
	* @param path
	* the path of the resource entry.
	* @return the {@link ImageDescriptor} based on a {@link Bundle} and
	* resource entry path.
	*/
	public static ImageDescriptor getPluginImageDescriptor(String symbolicName, String path) {
	try {
	URL url = getPluginImageURL(symbolicName, path);
	if (url != null) {
	return ImageDescriptor.createFromURL(url);
	}
	} catch (Throwable e) {
	// Ignore any exceptions
	}
	return null;
	}

	/**
	* Returns an {@link URL} based on a {@link Bundle} and resource entry path.
	*/
	private static URL getPluginImageURL(String symbolicName, String path) {
	// try runtime plugins
	{
	Bundle bundle = Platform.getBundle(symbolicName);
	if (bundle != null) {
	return bundle.getEntry(path);
	}
	}
	// try design time provider
	if (m_designTimePluginResourceProvider != null) {
	return m_designTimePluginResourceProvider.getEntry(symbolicName, path);
	}
	// no such resource
	return null;
	}

	/**
	* Returns an {@link URL} based on a plugin and file path.
	*
	* @param plugin
	* the plugin {@link Object} containing the file path.
	* @param name
	* the file path.
	* @return the {@link URL} representing the file at the specified path.
	* @throws Exception
	*/
	private static URL getPluginImageURL(Object plugin, String name) throws Exception {
	// try to work with 'plugin' as with OSGI BundleContext
	try {
	Class<?> BundleClass = Class.forName("org.osgi.framework.Bundle"); //$NON-NLS-1$
	Class<?> BundleContextClass = Class.forName("org.osgi.framework.BundleContext"); //$NON-NLS-1$
	if (BundleContextClass.isAssignableFrom(plugin.getClass())) {
	Method getBundleMethod = BundleContextClass.getMethod("getBundle"); //$NON-NLS-1$
	Object bundle = getBundleMethod.invoke(plugin);
	//
	Class<?> PathClass = Class.forName("org.eclipse.core.runtime.Path"); //$NON-NLS-1$
	Constructor<?> pathConstructor = PathClass.getConstructor(String.class);
	Object path = pathConstructor.newInstance(name);
	//
	Class<?> IPathClass = Class.forName("org.eclipse.core.runtime.IPath"); //$NON-NLS-1$
	Class<?> PlatformClass = Class.forName("org.eclipse.core.runtime.Platform"); //$NON-NLS-1$
	Method findMethod = PlatformClass.getMethod("find", BundleClass, IPathClass); //$NON-NLS-1$
	return (URL) findMethod.invoke(null, bundle, path);
	}
	} catch (Throwable e) {
	// Ignore any exceptions
	}
	// else work with 'plugin' as with usual Eclipse plugin
	{
	Class<?> PluginClass = Class.forName("org.eclipse.core.runtime.Plugin"); //$NON-NLS-1$
	if (PluginClass.isAssignableFrom(plugin.getClass())) {
	//
	Class<?> PathClass = Class.forName("org.eclipse.core.runtime.Path"); //$NON-NLS-1$
	Constructor<?> pathConstructor = PathClass.getConstructor(String.class);
	Object path = pathConstructor.newInstance(name);
	//
	Class<?> IPathClass = Class.forName("org.eclipse.core.runtime.IPath"); //$NON-NLS-1$
	Method findMethod = PluginClass.getMethod("find", IPathClass); //$NON-NLS-1$
	return (URL) findMethod.invoke(plugin, path);
	}
	}
	return null;
	}

	////////////////////////////////////////////////////////////////////////////
	//
	// General
	//
	////////////////////////////////////////////////////////////////////////////
	/**
	* Dispose of cached objects and their underlying OS resources. This should
	* only be called when the cached objects are no longer needed (e.g. on
	* application shutdown).
	*/
	public static void dispose() {
	disposeColors();
	disposeFonts();
	disposeImages();
	}
	}