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Java > Open Source Codes > org > w3c > dom > css > CSSValueList


1 /*
2  * Copyright (c) 2000 World Wide Web Consortium,
3  * (Massachusetts Institute of Technology, Institut National de
4  * Recherche en Informatique et en Automatique, Keio University). All
5  * Rights Reserved. This program is distributed under the W3C's Software
6  * Intellectual Property License. This program is distributed in the
7  * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
8  * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
9  * PURPOSE.
10  * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
11  */
12
13 package org.w3c.dom.css;
14
15 /**
16  * The <code>CSSValueList</code> interface provides the abstraction of an
17  * ordered collection of CSS values.
18  * <p> Some properties allow an empty list into their syntax. In that case,
19  * these properties take the <code>none</code> identifier. So, an empty list
20  * means that the property has the value <code>none</code>.
21  * <p> The items in the <code>CSSValueList</code> are accessible via an
22  * integral index, starting from 0.
23  * <p>See also the <a HREF='http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113'>Document Object Model (DOM) Level 2 Style Specification</a>.
24  * @since DOM Level 2
25  */
26 public interface CSSValueList extends CSSValue {
27     /**
28      * The number of <code>CSSValues</code> in the list. The range of valid
29      * values of the indices is <code>0</code> to <code>length-1</code>
30      * inclusive.
31      */
32     public int getLength();
33
34     /**
35      * Used to retrieve a <code>CSSValue</code> by ordinal index. The order in
36      * this collection represents the order of the values in the CSS style
37      * property. If index is greater than or equal to the number of values
38      * in the list, this returns <code>null</code>.
39      * @param indexIndex into the collection.
40      * @return The <code>CSSValue</code> at the <code>index</code> position
41      * in the <code>CSSValueList</code>, or <code>null</code> if that is
42      * not a valid index.
43      */
44     public CSSValue item(int index);
45
46 }
47
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