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    import 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     */
035    public 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    }