/*

 * Copyright (c) 1997, 2000, 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 javax.swing.text;

import java.awt.Component;

import javax.swing.event.ChangeListener;

import javax.swing.event.ChangeEvent;

import java.util.Enumeration;

import java.util.Hashtable;

/**

 * A collection of attributes to associate with an element in a document.

 * Since these are typically used to associate character and paragraph

 * styles with the element, operations for this are provided.  Other

 * customized attributes that get associated with the element will

 * effectively be name-value pairs that live in a hierarchy and if a name

 * (key) is not found locally, the request is forwarded to the parent.

 * Commonly used attributes are separated out to facilitate alternative

 * implementations that are more efficient.

 *

 * @author  Timothy Prinzing

 */

public interface Style extends MutableAttributeSet {

    /**

     * Fetches the name of the style.   A style is not required to be named,

     * so <code>null</code> is returned if there is no name

     * associated with the style.

     *

     * @return the name

     */

    public String getName();

    /**

     * Adds a listener to track whenever an attribute

     * has been changed.

     *

     * @param l the change listener

     */

    public void addChangeListener(ChangeListener l);

    /**

     * Removes a listener that was tracking attribute changes.

     *

     * @param l the change listener

     */

    public void removeChangeListener(ChangeListener l);

}