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} 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 }