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Java > Open Source Codes > com > steadystate > css > dom > CSSCharsetRuleImpl


1 /*
2  * CSSCharsetRule.java
3  *
4  * Steady State CSS2 Parser
5  *
6  * Copyright (C) 1999, 2002 Steady State Software Ltd. All rights reserved.
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with this library; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21  *
22  * To contact the authors of the library, write to Steady State Software Ltd.,
23  * 49 Littleworth, Wing, Buckinghamshire, LU7 0JX, England
24  *
25  * http://www.steadystate.com/css/
26  * mailto:css@steadystate.co.uk
27  *
28  * $Id: CSSCharsetRuleImpl.java,v 1.1.1.1 2003/12/28 21:22:47 davidsch Exp $
29  */
30
31 package com.steadystate.css.dom;
32
33 import java.io.IOException JavaDoc;
34 import java.io.Serializable JavaDoc;
35 import java.io.StringReader JavaDoc;
36 import org.w3c.dom.*;
37 import org.w3c.dom.css.*;
38 import org.w3c.css.sac.*;
39 import com.steadystate.css.parser.*;
40
41 /**
42  *
43  * @author David Schweinsberg
44  * @version $Release$
45  */
46 public class CSSCharsetRuleImpl implements CSSCharsetRule, Serializable JavaDoc {
47
48     CSSStyleSheetImpl _parentStyleSheet = null;
49     CSSRule _parentRule = null;
50     String JavaDoc _encoding = null;
51
52     public CSSCharsetRuleImpl(
53             CSSStyleSheetImpl parentStyleSheet,
54             CSSRule parentRule,
55             String JavaDoc encoding) {
56         _parentStyleSheet = parentStyleSheet;
57         _parentRule = parentRule;
58         _encoding = encoding;
59     }
60
61     public short getType() {
62         return CHARSET_RULE;
63     }
64
65     public String JavaDoc getCssText() {
66         return "@charset \"" + getEncoding() + "\";";
67     }
68
69     public void setCssText(String JavaDoc cssText) throws DOMException {
70         if (_parentStyleSheet != null && _parentStyleSheet.isReadOnly()) {
71             throw new DOMExceptionImpl(
72                 DOMException.NO_MODIFICATION_ALLOWED_ERR,
73                 DOMExceptionImpl.READ_ONLY_STYLE_SHEET);
74         }
75
76         try {
77             InputSource is = new InputSource(new StringReader JavaDoc(cssText));
78             CSSOMParser parser = new CSSOMParser();
79             CSSRule r = parser.parseRule(is);
80
81             // The rule must be a charset rule
82 if (r.getType() == CSSRule.CHARSET_RULE) {
83                 _encoding = ((CSSCharsetRuleImpl)r)._encoding;
84             } else {
85                 throw new DOMExceptionImpl(
86                     DOMException.INVALID_MODIFICATION_ERR,
87                     DOMExceptionImpl.EXPECTING_CHARSET_RULE);
88             }
89         } catch (CSSException e) {
90             throw new DOMExceptionImpl(
91                 DOMException.SYNTAX_ERR,
92                 DOMExceptionImpl.SYNTAX_ERROR,
93                 e.getMessage());
94         } catch (IOException JavaDoc e) {
95             throw new DOMExceptionImpl(
96                 DOMException.SYNTAX_ERR,
97                 DOMExceptionImpl.SYNTAX_ERROR,
98                 e.getMessage());
99         }
100     }
101
102     public CSSStyleSheet getParentStyleSheet() {
103         return _parentStyleSheet;
104     }
105
106     public CSSRule getParentRule() {
107         return _parentRule;
108     }
109
110     public String JavaDoc getEncoding() {
111         return _encoding;
112     }
113
114     public void setEncoding(String JavaDoc encoding) throws DOMException {
115         _encoding = encoding;
116     }
117 }
118
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