01: /*
02: * Copyright (c) 2000 World Wide Web Consortium,
03: * (Massachusetts Institute of Technology, Institut National de
04: * Recherche en Informatique et en Automatique, Keio University). All
05: * Rights Reserved. This program is distributed under the W3C's Software
06: * Intellectual Property License. This program is distributed in the
07: * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
08: * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
09: * 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 index Index 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: }
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