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    1   /*
    2    * Copyright (c) 1997, 2000, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
    6    * under the terms of the GNU General Public License version 2 only, as
    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   20    *
   21    * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   22    * or visit www.oracle.com if you need additional information or have any
   23    * questions.
   24    */
   25   package javax.swing.text;
   26   
   27   import java.awt.Component;
   28   import javax.swing.event.ChangeListener;
   29   import javax.swing.event.ChangeEvent;
   30   
   31   import java.util.Enumeration;
   32   import java.util.Hashtable;
   33   
   34   
   35   
   36   /**
   37    * A collection of attributes to associate with an element in a document.
   38    * Since these are typically used to associate character and paragraph
   39    * styles with the element, operations for this are provided.  Other
   40    * customized attributes that get associated with the element will
   41    * effectively be name-value pairs that live in a hierarchy and if a name
   42    * (key) is not found locally, the request is forwarded to the parent.
   43    * Commonly used attributes are separated out to facilitate alternative
   44    * implementations that are more efficient.
   45    *
   46    * @author  Timothy Prinzing
   47    */
   48   public interface Style extends MutableAttributeSet {
   49   
   50       /**
   51        * Fetches the name of the style.   A style is not required to be named,
   52        * so <code>null</code> is returned if there is no name
   53        * associated with the style.
   54        *
   55        * @return the name
   56        */
   57       public String getName();
   58   
   59       /**
   60        * Adds a listener to track whenever an attribute
   61        * has been changed.
   62        *
   63        * @param l the change listener
   64        */
   65       public void addChangeListener(ChangeListener l);
   66   
   67       /**
   68        * Removes a listener that was tracking attribute changes.
   69        *
   70        * @param l the change listener
   71        */
   72       public void removeChangeListener(ChangeListener l);
   73   
   74   
   75   }

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