/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.xml.transform.impl.html;
import org.exoplatform.services.xml.transform.EncodingMap;
import org.exoplatform.services.xml.transform.NotSupportedIOTypeException;
import org.exoplatform.services.xml.transform.html.HTMLTransformer;
import org.exoplatform.services.xml.transform.impl.EncodingMapImpl;
import org.exoplatform.services.xml.transform.impl.TransformerBase;
import org.w3c.tidy.Tidy;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.stream.StreamResult;
/**
* Created by The eXo Platform SAS . Tidying incoming HTML to XHTML result
*
* @author <a href="mailto:geaz@users.sourceforge.net">Gennady Azarenkov</a>
* @author <a href="mailto:alex.kravchuk@gmail.com">Alexander Kravchuk</a>
* @version $Id: TidyTransformerImpl.java 5799 2006-05-28 17:55:42Z geaz $
*/
public class TidyTransformerImpl extends TransformerBase implements HTMLTransformer
{
protected Tidy tidy;
protected Properties props;
public TidyTransformerImpl()
{
super();
tidy = new Tidy();
initProps();
}
public Properties getOutputProperties()
{
return this.props;
}
/**
* Sets properties for Tidy parser See Tidy properties
*/
public void setOutputProperties(Properties props)
{
this.props = props;
}
private void initProps()
{
this.props = new Properties();
props.setProperty("quiet", "true");
props.setProperty("quote-ampersand", "true");
props.setProperty("output-xhtml", "true");
props.setProperty("show-warnings", "false");
props.setProperty("clean", "true");
props.setProperty("add-xml-decl", "true");
props.setProperty("char-encoding", "raw");//
props.setProperty("doctype", "omit");
props.setProperty("tidy-mark", "no");
}
public void processNotNativeResult(ByteArrayInputStream byteInputStream) throws TransformerException
{
// ByteArrayInputStream byteInputStream =
// new ByteArrayInputStream(output.toByteArray());
//
transformInputStream2Result(byteInputStream, getResult());
log.debug("Transform from temp output to " + getResult().getClass().getName() + " complete");
}
protected void internalTransform(Source source) throws NotSupportedIOTypeException, TransformerException,
IllegalStateException
{
InputStream input = sourceAsInputStream(source);
try
{
log.debug(" input available bytes " + input.available());
if (input.available() == 0)
return;
}
catch (IOException ex)
{
log.error("Error on read Source", ex);
new TransformerException("Error on read source", ex);
}
// OutputStream output = null;
tidy.setConfigurationFromProps(props);
if (getResult() instanceof StreamResult)
{
OutputStream output = ((StreamResult)getResult()).getOutputStream();
log.debug("Prepare to write transform result direct to OutputStream");
tidy.parse(input, output);
log.debug("Tidy parse is complete");
}
else
{
ByteArrayOutputStream output = new ByteArrayOutputStream();
log.debug("Prepare to write transform result to temp output");
tidy.parse(input, output);
log.debug("Tidy parse is complete");
// sex with coding
String outputString = output.toString();
try
{
outputString =
outputString.replaceFirst("<\\?xml version=\"1.0\"\\?>", "<?xml version=\"1.0\" encoding=\""
+ getCurrentIANAEncoding() + "\"?>");
output.flush();
}
catch (IOException ex)
{
throw new TransformerException(ex);
}
processNotNativeResult(new ByteArrayInputStream(outputString.getBytes()));
}
}
protected String getCurrentIANAEncoding() throws UnsupportedEncodingException
{
EncodingMap encodingMap = new EncodingMapImpl();
String ianaEncoding = encodingMap.convertJava2IANA(System.getProperty("file.encoding"));
if (ianaEncoding == null)
{
throw new UnsupportedEncodingException("Can't find corresponding type of encoding for : "
+ System.getProperty("file.encoding"));
}
return encodingMap.convertJava2IANA(ianaEncoding);
}
}