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 */
13 package org.w3c.dom.css;
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();
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);
46 }