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 */ 012 013 package org.w3c.dom.css; 014 015 /** 016 * The <code>CSSRuleList</code> interface provides the abstraction of an 017 * ordered collection of CSS rules. 018 * <p> The items in the <code>CSSRuleList</code> are accessible via an 019 * integral index, starting from 0. 020 * <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>. 021 * @since DOM Level 2 022 */ 023 public interface CSSRuleList { 024 /** 025 * The number of <code>CSSRules</code> in the list. The range of valid 026 * child rule indices is <code>0</code> to <code>length-1</code> 027 * inclusive. 028 */ 029 public int getLength(); 030 031 /** 032 * Used to retrieve a CSS rule by ordinal index. The order in this 033 * collection represents the order of the rules in the CSS style sheet. 034 * If index is greater than or equal to the number of rules in the list, 035 * this returns <code>null</code>. 036 * @param index Index into the collection 037 * @return The style rule at the <code>index</code> position in the 038 * <code>CSSRuleList</code>, or <code>null</code> if that is not a 039 * valid index. 040 */ 041 public CSSRule item(int index); 042 043 }