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Java > Open Source Codes > org > apache > batik > css > engine > sac > CSSClassCondition


1 /*
2
3    Copyright 2002-2003 The Apache Software Foundation
4
5    Licensed under the Apache License, Version 2.0 (the "License");
6    you may not use this file except in compliance with the License.
7    You may obtain a copy of the License at
8
9        http://www.apache.org/licenses/LICENSE-2.0
10
11    Unless required by applicable law or agreed to in writing, software
12    distributed under the License is distributed on an "AS IS" BASIS,
13    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14    See the License for the specific language governing permissions and
15    limitations under the License.
16
17  */
18 package org.apache.batik.css.engine.sac;
19
20 import org.apache.batik.css.engine.CSSStylableElement;
21 import org.w3c.dom.Element JavaDoc;
22
23 /**
24  * This class provides an implementation of the
25  * {@link org.w3c.css.sac.AttributeCondition} interface.
26  *
27  * @author <a HREF="mailto:stephane@hillion.org">Stephane Hillion</a>
28  * @version $Id: CSSClassCondition.java,v 1.6 2004/08/18 07:12:51 vhardy Exp $
29  */
30 public class CSSClassCondition extends CSSAttributeCondition {
31
32     /**
33      * Creates a new CSSAttributeCondition object.
34      */
35     public CSSClassCondition(String JavaDoc localName,
36                              String JavaDoc namespaceURI,
37                              String JavaDoc value) {
38     super(localName, namespaceURI, true, value);
39     }
40     
41     /**
42      * <b>SAC</b>: Implements {@link
43      * org.w3c.css.sac.Condition#getConditionType()}.
44      */
45     public short getConditionType() {
46     return SAC_CLASS_CONDITION;
47     }
48     
49     /**
50      * Tests whether this condition matches the given element.
51      */
52     public boolean match(Element e, String JavaDoc pseudoE) {
53         if (!(e instanceof CSSStylableElement))
54             return false; // Can't match an unstylable element.
55 String JavaDoc attr = ((CSSStylableElement)e).getCSSClass();
56     String JavaDoc val = getValue();
57     int i = attr.indexOf(val);
58     if (i == -1) {
59         return false;
60     }
61     if (i != 0 && !Character.isSpaceChar(attr.charAt(i - 1))) {
62         return false;
63     }
64     int j = i + val.length();
65     return (j == attr.length() ||
66         (j < attr.length() && Character.isSpaceChar(attr.charAt(j))));
67     }
68
69     /**
70      * Returns a text representation of this object.
71      */
72     public String JavaDoc toString() {
73     return "." + getValue();
74     }
75 }
76
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