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);
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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);
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