/******************************************************************************* * 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.custom;import org.eclipse.swt.*;import org.eclipse.swt.graphics.*;import org.eclipse.swt.internal.CloneableCompatibility;public class StyleRange implements CloneableCompatibility {	public int start;		// style start offset. 0 based from the document start	public int length;		// style length.		public Color foreground; 	public Color background;	public int fontStyle = SWT.NORMAL;	// may be SWT.NORMAL or SWT.BOLDpublic StyleRange() {}/**  * Create a new style range. * <p> * * @param start start offset of the style * @param length length of the style  * @param foreground foreground color of the style, null if none  * @param background background color of the style, null if none */public StyleRange(int start, int length, Color foreground, Color background) {	this.start = start;	this.length = length;	this.foreground = foreground;	this.background = background;}/**  * Create a new style range. * <p> * * @param start start offset of the style * @param length length of the style  * @param foreground foreground color of the style, null if none  * @param background background color of the style, null if none * @param fontStyle font style of the style, may be SWT.NORMAL or SWT.BOLD */public StyleRange(int start, int length, Color foreground, Color background, int fontStyle) {	this.start = start;	this.length = length;	this.foreground = foreground;	this.background = background;	this.fontStyle = fontStyle;}/** * Compare the specified object to this StyleRange and answer if the two  * are equal. The object must be an instance of StyleRange and have the * same field values. * <p> * * @param object the object to compare with this object * @return true if the objects are equal, false otherwise */public boolean equals(Object object) {	StyleRange style;	if (object == this) return true;	if (object instanceof StyleRange) style = (StyleRange)object;	else return false;	if (this.start != style.start) return false;	if (this.length != style.length) return false;	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.fontStyle != style.fontStyle) return false;	return true;}/** * Returns an integer hash code for the receiver. Objects which are * equal answer the same value for this method. * <p> * * @return the receiver's hash */public int hashCode() {	int code = start + length;		if (foreground != null)		code += foreground.hashCode();	if (background != null)		code += background.hashCode();	return code + fontStyle;}/** * Returns whether or not the receiver is unstyled (i.e., does not have any  * style attributes specified). * <p> * * @return true if the receiver is unstyled, false otherwise. */public boolean isUnstyled() {	if (this.foreground != null) return false;	if (this.background != null) return false;	if (this.fontStyle != SWT.NORMAL) return false;	return true;}/** * Compares the specified object to this StyleRange and answer if the two  * are similar. The object must be an instance of StyleRange and have the * same field values for except for start and length. * <p> * * @param object the object to compare with this object * @return true if the objects are similar, false otherwise */public boolean similarTo(StyleRange style) {	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.fontStyle != style.fontStyle) return false;	return true;}/** * Answers a new StyleRange with the same values as this StyleRange. * <p> * * @return a shallow copy of this StyleRange */	public Object clone() { 	StyleRange style = new StyleRange(start, length, foreground, background, fontStyle);	return style;}/**  * Answers a string description of the receiver. * <p> * * @return a printable representation for the receiver. */public String toString() {	StringBuffer buf = new StringBuffer();	buf.append(start + "," + length + " fg:" + foreground + " bg:" + background + " fStyle:");	if (fontStyle == SWT.NORMAL) {		buf.append("normal");	} else if (fontStyle == SWT.BOLD) {		buf.append("bold");	}	return buf.toString();}}