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/*
 * Copyright © 1996-2009 GlobalMentor, Inc. 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.globalmentor.swing.text;

import java.util.Enumeration;
import javax.swing.text.*;
import javax.swing.text.StyleConstants;

/**
 * Allows Java Swing attribute sets to be manipulated.
 * @author Garret Wilson
 */
public class AttributeSets //TODO do we really want this class with a Styles class?
{

	/** This class cannot be publicly instantiated. */
	private AttributeSets() {
	}

	/**
	 * Constructs a string representing the names and values of the attribute set. This method is modified from the code found in ElementTreePanel,
	 * Copyright (c) 1998, 1999 by Sun Microsystems, Inc., written by Scott Violet version 1.9 04/23/99.
	 * @param attributeSet The attribute set for which a representational string should be returned.
	 * @return A string representation of the contents of the attribute set, or the empty string if the attribute set is null.
	 */
	public static String getAttributeSetString(final AttributeSet attributeSet) {
		if(attributeSet != null) { //if a valid attribute set was passed
			final StringBuffer stringBuffer = new StringBuffer("["); //create a new string buffer to hold the string informaiton
			final Enumeration names = attributeSet.getAttributeNames(); //get the enumeration of names
			while(names.hasMoreElements()) { //while there are more names
				final Object nextName = names.nextElement(); //get the next name
				if(nextName != StyleConstants.ResolveAttribute) {
					stringBuffer.append(" ");
					stringBuffer.append(nextName);
					stringBuffer.append("=");
					stringBuffer.append(attributeSet.getAttribute(nextName));
				}
			}
			stringBuffer.append(" ]");
			return stringBuffer.toString(); //return the string buffer as a string
		} else
			//if valid attribute set was returned
			return ""; //return an empty string
	}

}