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Java > Open Source Codes > com > gargoylesoftware > htmlunit > html > HtmlLabel


1 /*
2  * Copyright (c) 2002, 2005 Gargoyle Software Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are met:
6  *
7  * 1. Redistributions of source code must retain the above copyright notice,
8  * this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright notice,
10  * this list of conditions and the following disclaimer in the documentation
11  * and/or other materials provided with the distribution.
12  * 3. The end-user documentation included with the redistribution, if any, must
13  * include the following acknowledgment:
14  *
15  * "This product includes software developed by Gargoyle Software Inc.
16  * (http://www.GargoyleSoftware.com/)."
17  *
18  * Alternately, this acknowledgment may appear in the software itself, if
19  * and wherever such third-party acknowledgments normally appear.
20  * 4. The name "Gargoyle Software" must not be used to endorse or promote
21  * products derived from this software without prior written permission.
22  * For written permission, please contact info@GargoyleSoftware.com.
23  * 5. Products derived from this software may not be called "HtmlUnit", nor may
24  * "HtmlUnit" appear in their name, without prior written permission of
25  * Gargoyle Software Inc.
26  *
27  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
28  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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32  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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35  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
36  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37  */
38 package com.gargoylesoftware.htmlunit.html;
39
40 import java.util.Map JavaDoc;
41 import java.util.Iterator JavaDoc;
42
43 /**
44  * Wrapper for the html element "label".
45  *
46  * @version $Revision: 100 $
47  * @author <a HREF="mailto:mbowler@GargoyleSoftware.com">Mike Bowler</a>
48  * @author David K. Taylor
49  * @author <a HREF="mailto:cse@dynabean.de">Christian Sell</a>
50  */
51 public class HtmlLabel extends FocusableElement {
52
53     /** the HTML tag represented by this element */
54     public static final String JavaDoc TAG_NAME = "label";
55
56     /**
57      * Create an instance of HtmlLabel
58      *
59      * @param page The HtmlPage that contains this element.
60      * @param attributes the initial attributes
61      */
62     public HtmlLabel( final HtmlPage page, final Map JavaDoc attributes ) {
63         super( page, attributes );
64     }
65
66     /**
67      * @return the HTML tag name
68      */
69     public String JavaDoc getTagName() {
70         return TAG_NAME;
71     }
72
73     /**
74      * Return the value of the attribute "for". Refer to the
75      * <a HREF='http://www.w3.org/TR/html401/'>HTML 4.01</a>
76      * documentation for details on the use of this attribute.
77      *
78      * @return The value of the attribute "for"
79      * or an empty string if that attribute isn't defined.
80      */
81     public final String JavaDoc getForAttribute() {
82         return getAttributeValue("for");
83     }
84
85
86     /**
87      * Return the value of the attribute "accesskey". Refer to the
88      * <a HREF='http://www.w3.org/TR/html401/'>HTML 4.01</a>
89      * documentation for details on the use of this attribute.
90      *
91      * @return The value of the attribute "accesskey"
92      * or an empty string if that attribute isn't defined.
93      */
94     public final String JavaDoc getAccessKeyAttribute() {
95         return getAttributeValue("accesskey");
96     }
97
98
99     /**
100      * Return the value of the attribute "onfocus". Refer to the
101      * <a HREF='http://www.w3.org/TR/html401/'>HTML 4.01</a>
102      * documentation for details on the use of this attribute.
103      *
104      * @return The value of the attribute "onfocus"
105      * or an empty string if that attribute isn't defined.
106      */
107     public final String JavaDoc getOnFocusAttribute() {
108         return getAttributeValue("onfocus");
109     }
110
111
112     /**
113      * Return the value of the attribute "onblur". Refer to the
114      * <a HREF='http://www.w3.org/TR/html401/'>HTML 4.01</a>
115      * documentation for details on the use of this attribute.
116      *
117      * @return The value of the attribute "onblur"
118      * or an empty string if that attribute isn't defined.
119      */
120     public final String JavaDoc getOnBlurAttribute() {
121         return getAttributeValue("onblur");
122     }
123
124
125     /**
126      * Remove focus from this element.
127      */
128     public void blur() {
129         final FocusableElement element = getReferencedElement();
130         if (element != null) {
131             element.blur();
132         }
133     }
134
135
136     /**
137      * Set the focus to this element.
138      */
139     public void focus() {
140         final FocusableElement element = getReferencedElement();
141         if (element != null) {
142             element.focus();
143         }
144     }
145
146
147     private FocusableElement getReferencedElement() {
148         final String JavaDoc elementId = getAttributeValue("for");
149         if (elementId.length() != 0) {
150             final HtmlElement element = getHtmlElementById(elementId);
151             if (element != null && element instanceof HtmlInput) {
152                 return (FocusableElement) element;
153             }
154         }
155         else {
156             final Iterator JavaDoc childIterator = getChildIterator();
157             while (childIterator.hasNext()) {
158                 final DomNode element = (DomNode) childIterator.next();
159                 if (element instanceof HtmlInput) {
160                     return (FocusableElement) element;
161                 }
162             }
163         }
164         return null;
165     }
166 }
167
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