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


1 /*
2
3    Copyright 2002 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 java.util.Set JavaDoc;
21
22 import org.w3c.css.sac.Selector;
23 import org.w3c.css.sac.SimpleSelector;
24 import org.w3c.dom.Element JavaDoc;
25 import org.w3c.dom.Node JavaDoc;
26
27 /**
28  * This class provides an implementation for the
29  * {@link org.w3c.css.sac.DescendantSelector} interface.
30  *
31  * @author <a HREF="mailto:stephane@hillion.org">Stephane Hillion</a>
32  * @version $Id: CSSDirectAdjacentSelector.java,v 1.4 2004/08/18 07:12:51 vhardy Exp $
33  */
34
35 public class CSSDirectAdjacentSelector extends AbstractSiblingSelector {
36
37     /**
38      * Creates a new CSSDirectAdjacentSelector object.
39      */
40     public CSSDirectAdjacentSelector(short type,
41                                      Selector parent,
42                                      SimpleSelector simple) {
43     super(type, parent, simple);
44     }
45
46     /**
47      * <b>SAC</b>: Implements {@link
48      * org.w3c.css.sac.Selector#getSelectorType()}.
49      */
50     public short getSelectorType() {
51     return SAC_DIRECT_ADJACENT_SELECTOR;
52     }
53
54     /**
55      * Tests whether this selector matches the given element.
56      */
57     public boolean match(Element JavaDoc e, String JavaDoc pseudoE) {
58     Node JavaDoc n = e;
59         while ((n = n.getPreviousSibling()) != null &&
60                n.getNodeType() != Node.ELEMENT_NODE);
61     if (n != null) {
62         return ((ExtendedSelector)getSelector()).match((Element JavaDoc)n,
63                                                                  null) &&
64            ((ExtendedSelector)getSiblingSelector()).match(e, pseudoE);
65     }
66     return false;
67     }
68
69     /**
70      * Fills the given set with the attribute names found in this selector.
71      */
72     public void fillAttributeSet(Set JavaDoc attrSet) {
73         ((ExtendedSelector)getSelector()).fillAttributeSet(attrSet);
74         ((ExtendedSelector)getSiblingSelector()).fillAttributeSet(attrSet);
75     }
76
77     /**
78      * Returns a representation of the selector.
79      */
80     public String JavaDoc toString() {
81     return getSelector() + " + " + getSiblingSelector();
82     }
83 }
84
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