1 package org.codehaus.groovy.sandbox.markup;
2 /*
3
4 Copyright 2004 (C) John Wilson. All Rights Reserved.
5
6 Redistribution and use of this software and associated documentation
7 ("Software"), with or without modification, are permitted provided
8 that the following conditions are met:
9
10 1. Redistributions of source code must retain copyright
11 statements and notices. Redistributions must also contain a
12 copy of this document.
13
14 2. Redistributions in binary form must reproduce the
15 above copyright notice, this list of conditions and the
16 following disclaimer in the documentation and/or other
17 materials provided with the distribution.
18
19 3. The name "groovy" must not be used to endorse or promote
20 products derived from this Software without prior written
21 permission of The Codehaus. For written permission,
22 please contact info@codehaus.org.
23
24 4. Products derived from this Software may not be called "groovy"
25 nor may "groovy" appear in their names without prior written
26 permission of The Codehaus. "groovy" is a registered
27 trademark of The Codehaus.
28
29 5. Due credit should be given to The Codehaus -
30 http://groovy.codehaus.org/
31
32 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
36 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43 OF THE POSSIBILITY OF SUCH DAMAGE.
44
45 */
46
47 import java.io.IOException;
48 import java.io.Writer;
49
50 public class StreamingMarkupWriter extends Writer {
51 protected final Writer delegate;
52 private final int encodingLimit = 127; // initally encode everything that's not US ASCII
53 private final Writer bodyWriter = new Writer() {
54 /* (non-Javadoc)
55 * @see java.io.Writer#close()
56 */
57 public void close() throws IOException {
58 StreamingMarkupWriter.this.close();
59 }
60
61 /* (non-Javadoc)
62 * @see java.io.Writer#flush()
63 */
64 public void flush() throws IOException {
65 StreamingMarkupWriter.this.flush();
66 }
67
68 /* (non-Javadoc)
69 * @see java.io.Writer#write(int)
70 */
71 public void write(int c) throws IOException {
72 if (c > StreamingMarkupWriter.this.encodingLimit) {
73 StreamingMarkupWriter.this.delegate.write("&#x");
74 StreamingMarkupWriter.this.delegate.write(Integer.toHexString(c));
75 StreamingMarkupWriter.this.delegate.write(';');
76 } else if (c == '<') {
77 StreamingMarkupWriter.this.delegate.write("<");
78 } else if (c == '>') {
79 StreamingMarkupWriter.this.delegate.write(">");
80 } else if (c == '&') {
81 StreamingMarkupWriter.this.delegate.write("&");
82 } else {
83 StreamingMarkupWriter.this.delegate.write(c);
84 }
85 }
86
87 /* (non-Javadoc)
88 * @see java.io.Writer#write(char[], int, int)
89 */
90 public void write(final char[] cbuf, int off, int len) throws IOException {
91 while (len-- > 0){
92 write(cbuf[off++]);
93 }
94 }
95
96 public Writer attributeValue() {
97 return StreamingMarkupWriter.this.attributeWriter;
98 }
99
100 public Writer bodyText() {
101 return bodyWriter;
102 }
103
104 public Writer unescaped() {
105 return StreamingMarkupWriter.this;
106 }
107 };
108
109 private final Writer attributeWriter = new Writer() {
110 /* (non-Javadoc)
111 * @see java.io.Writer#close()
112 */
113 public void close() throws IOException {
114 StreamingMarkupWriter.this.close();
115 }
116
117 /* (non-Javadoc)
118 * @see java.io.Writer#flush()
119 */
120 public void flush() throws IOException {
121 StreamingMarkupWriter.this.flush();
122 }
123
124 /* (non-Javadoc)
125 * @see java.io.Writer#write(int)
126 */
127 public void write(int c) throws IOException {
128 if (c == '\'') {
129 StreamingMarkupWriter.this.delegate.write("'");
130 } else {
131 StreamingMarkupWriter.this.bodyWriter.write(c);
132 }
133 }
134
135 /* (non-Javadoc)
136 * @see java.io.Writer#write(char[], int, int)
137 */
138 public void write(final char[] cbuf, int off, int len) throws IOException {
139 while (len-- > 0){
140 write(cbuf[off++]);
141 }
142 }
143
144 public Writer attributeValue() {
145 return attributeWriter;
146 }
147
148 public Writer bodyText() {
149 return StreamingMarkupWriter.this.bodyWriter;
150 }
151
152 public Writer unescaped() {
153 return StreamingMarkupWriter.this;
154 }
155 };
156
157 public StreamingMarkupWriter(final Writer delegate) {
158 this.delegate = delegate;
159 }
160
161 /* (non-Javadoc)
162 * @see java.io.Writer#close()
163 */
164 public void close() throws IOException {
165 this.delegate.close();
166 }
167
168 /* (non-Javadoc)
169 * @see java.io.Writer#flush()
170 */
171 public void flush() throws IOException {
172 this.delegate.flush();
173 }
174
175 /* (non-Javadoc)
176 * @see java.io.Writer#write(char[], int, int)
177 */
178 public void write(final char[] cbuf, int off, int len) throws IOException {
179 this.delegate.write(cbuf, off, len);
180 }
181
182 public Writer attributeValue() {
183 return this.attributeWriter;
184 }
185
186 public Writer bodyText() {
187 return this.bodyWriter;
188 }
189
190 public Writer unescaped() {
191 return this;
192 }
193 }