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CookCC - a Lexer / Parser (LALR(1)) Project

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/*
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.
 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.dom.css;

/**
 * The CSSValueList interface provides the abstraction of an 
 * ordered collection of CSS values.
 *  Some properties allow an empty list into their syntax. In that case, 
 * these properties take the none identifier. So, an empty list 
 * means that the property has the value none. 
 * 
 The items in the CSSValueList are accessible via an 
 * integral index, starting from 0. 
 * See also the Document Object Model (DOM) Level 2 Style Specification.
 * @since DOM Level 2
 */
public interface CSSValueList extends CSSValue {
    /**
     * The number of CSSValues in the list. The range of valid 
     * values of the indices is 0 to length-1 
     * inclusive.
     */
    public int getLength();

    /**
     * Used to retrieve a CSSValue by ordinal index. The order in 
     * this collection represents the order of the values in the CSS style 
     * property. If index is greater than or equal to the number of values 
     * in the list, this returns null.
     * @param index Index into the collection.
     * @return The CSSValue at the index position 
     *   in the CSSValueList, or null if that is 
     *   not a valid index.
     */
    public CSSValue item(int index);

}