/******************************************************************************* * Copyright (c) 2000, 2004 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Common Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/cpl-v10.html *  * Contributors: *     IBM Corporation - initial API and implementation *******************************************************************************/package org.eclipse.swt.graphics;import org.eclipse.swt.*;/** * <code>TextStyle</code> defines a set of styles that can be applied * to a range of text. * <p> * The hashCode() method in this class uses the values of the public * fields to compute the hash value. When storing instances of the * class in hashed collections, do not modify these fields after the * object has been inserted.   * </p> * <p> * Application code does <em>not</em> need to explicitly release the * resources managed by each instance when those instances are no longer * required, and thus no <code>dispose()</code> method is provided. * </p> *  * @see TextLayout * @see Font * @see Color *   * @since 3.0 */public class TextStyle {	/**	 * the font of the style	 */	public Font font;	/**	 * the foreground of the style	 */	public Color foreground;	/**	 * the background of the style	 */	public Color background;/**  * Create a new text style with the specified font, foreground * and background. * * @param font the font of the style, <code>null</code> if none  * @param foreground the foreground color of the style, <code>null</code> if none  * @param background the background color of the style, <code>null</code> if none */public TextStyle (Font font, Color foreground, Color background) {	if (font != null && font.isDisposed()) SWT.error (SWT.ERROR_INVALID_ARGUMENT);	if (foreground != null && foreground.isDisposed()) SWT.error (SWT.ERROR_INVALID_ARGUMENT);	if (background != null && background.isDisposed()) SWT.error (SWT.ERROR_INVALID_ARGUMENT);		this.font = font;	this.foreground = foreground;	this.background = background;}public boolean equals(Object object) {	if (object == this) return true;	if (object == null) return false;	if (!(object instanceof TextStyle)) return false;	TextStyle style = (TextStyle)object;		if (this.foreground != null) {		if (!this.foreground.equals(style.foreground)) return false;	} else if (style.foreground != null) return false;	if (this.background != null) {		if (!this.background.equals(style.background)) return false;	} else if (style.background != null) return false;	if (this.font != null) {		if (!this.font.equals(style.font)) return false;	} else if (style.font != null) return false;		return true;}public int hashCode() {	int hash = super.hashCode();	if (font != null) hash ^= font.hashCode();	if (foreground != null) hash ^= foreground.hashCode();	if (background != null) hash ^= background.hashCode();	return hash;}}