001 package org.codehaus.groovy.sandbox.markup; 002 /* 003 004 Copyright 2004 (C) John Wilson. All Rights Reserved. 005 006 Redistribution and use of this software and associated documentation 007 ("Software"), with or without modification, are permitted provided 008 that the following conditions are met: 009 010 1. Redistributions of source code must retain copyright 011 statements and notices. Redistributions must also contain a 012 copy of this document. 013 014 2. Redistributions in binary form must reproduce the 015 above copyright notice, this list of conditions and the 016 following disclaimer in the documentation and/or other 017 materials provided with the distribution. 018 019 3. The name "groovy" must not be used to endorse or promote 020 products derived from this Software without prior written 021 permission of The Codehaus. For written permission, 022 please contact info@codehaus.org. 023 024 4. Products derived from this Software may not be called "groovy" 025 nor may "groovy" appear in their names without prior written 026 permission of The Codehaus. "groovy" is a registered 027 trademark of The Codehaus. 028 029 5. Due credit should be given to The Codehaus - 030 http://groovy.codehaus.org/ 031 032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS 033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 043 OF THE POSSIBILITY OF SUCH DAMAGE. 044 045 */ 046 047 import java.io.IOException; 048 import java.io.Writer; 049 050 public class StreamingMarkupWriter extends Writer { 051 protected final Writer delegate; 052 private final int encodingLimit = 127; // initally encode everything that's not US ASCII 053 private final Writer bodyWriter = new Writer() { 054 /* (non-Javadoc) 055 * @see java.io.Writer#close() 056 */ 057 public void close() throws IOException { 058 StreamingMarkupWriter.this.close(); 059 } 060 061 /* (non-Javadoc) 062 * @see java.io.Writer#flush() 063 */ 064 public void flush() throws IOException { 065 StreamingMarkupWriter.this.flush(); 066 } 067 068 /* (non-Javadoc) 069 * @see java.io.Writer#write(int) 070 */ 071 public void write(int c) throws IOException { 072 if (c > StreamingMarkupWriter.this.encodingLimit) { 073 StreamingMarkupWriter.this.delegate.write(""); 074 StreamingMarkupWriter.this.delegate.write(Integer.toHexString(c)); 075 StreamingMarkupWriter.this.delegate.write(';'); 076 } else if (c == '<') { 077 StreamingMarkupWriter.this.delegate.write("<"); 078 } else if (c == '>') { 079 StreamingMarkupWriter.this.delegate.write(">"); 080 } else if (c == '&') { 081 StreamingMarkupWriter.this.delegate.write("&"); 082 } else { 083 StreamingMarkupWriter.this.delegate.write(c); 084 } 085 } 086 087 /* (non-Javadoc) 088 * @see java.io.Writer#write(char[], int, int) 089 */ 090 public void write(final char[] cbuf, int off, int len) throws IOException { 091 while (len-- > 0){ 092 write(cbuf[off++]); 093 } 094 } 095 096 public Writer attributeValue() { 097 return StreamingMarkupWriter.this.attributeWriter; 098 } 099 100 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 }