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
015import org.w3c.dom.DOMException;
016
017/**
018 *  The <code>CSSCharsetRule</code> interface represents a @charset rule in a 
019 * CSS style sheet. The value of the <code>encoding</code> attribute does 
020 * not affect the encoding of text data in the DOM objects; this encoding is 
021 * always UTF-16. After a stylesheet is loaded, the value of the 
022 * <code>encoding</code> attribute is the value found in the 
023 * <code>@charset</code> rule. If there was no <code>@charset</code> in the 
024 * original document, then no <code>CSSCharsetRule</code> is created. The 
025 * value of the <code>encoding</code> attribute may also be used as a hint 
026 * for the encoding used on serialization of the style sheet. 
027 * <p> The value of the @charset rule (and therefore of the 
028 * <code>CSSCharsetRule</code>) may not correspond to the encoding the 
029 * document actually came in; character encoding information e.g. in an HTTP 
030 * header, has priority (see CSS document representation) but this is not 
031 * reflected in the <code>CSSCharsetRule</code>. 
032 * <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>.
033 * @since DOM Level 2
034 */
035public interface CSSCharsetRule extends CSSRule {
036    /**
037     *  The encoding information used in this <code>@charset</code> rule. 
038     */
039    public String getEncoding();
040    /**
041     *  The encoding information used in this <code>@charset</code> rule. 
042     * @exception DOMException
043     *   SYNTAX_ERR: Raised if the specified encoding value has a syntax error 
044     *   and is unparsable.
045     *   <br>NO_MODIFICATION_ALLOWED_ERR: Raised if this encoding rule is 
046     *   readonly.
047     */
048    public void setEncoding(String encoding)
049                           throws DOMException;
050
051}