001/* 002 * Copyright (c) 2000 World Wide Web Consortium, 003 * (Massachusetts Institute of Technology, Institut National de 004 * Recherche en Informatique et en Automatique, Keio University). All 005 * Rights Reserved. This program is distributed under the W3C's Software 006 * Intellectual Property License. This program is distributed in the 007 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even 008 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 009 * PURPOSE. 010 * See W3C License http://www.w3.org/Consortium/Legal/ for more details. 011 */ 012 013package org.w3c.dom.css; 014 015/** 016 * The <code>CSSValueList</code> interface provides the abstraction of an 017 * ordered collection of CSS values. 018 * <p> Some properties allow an empty list into their syntax. In that case, 019 * these properties take the <code>none</code> identifier. So, an empty list 020 * means that the property has the value <code>none</code>. 021 * <p> The items in the <code>CSSValueList</code> are accessible via an 022 * integral index, starting from 0. 023 * <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>. 024 * @since DOM Level 2 025 */ 026public interface CSSValueList extends CSSValue { 027 /** 028 * The number of <code>CSSValues</code> in the list. The range of valid 029 * values of the indices is <code>0</code> to <code>length-1</code> 030 * inclusive. 031 */ 032 public int getLength(); 033 034 /** 035 * Used to retrieve a <code>CSSValue</code> by ordinal index. The order in 036 * this collection represents the order of the values in the CSS style 037 * property. If index is greater than or equal to the number of values 038 * in the list, this returns <code>null</code>. 039 * @param index Index into the collection. 040 * @return The <code>CSSValue</code> at the <code>index</code> position 041 * in the <code>CSSValueList</code>, or <code>null</code> if that is 042 * not a valid index. 043 */ 044 public CSSValue item(int index); 045 046}