/*
* Copyright (c) 2003-2011, Simon Brown
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* - Neither the name of Pebble nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package net.sourceforge.pebble.event.blogentry;
import net.sourceforge.pebble.domain.BlogEntry;
import net.sourceforge.pebble.api.event.blogentry.BlogEntryEvent;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.Document;
import org.w3c.tidy.Tidy;
import java.beans.PropertyChangeEvent;
import java.util.Iterator;
import java.util.List;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
/**
* Runs W3C Tidy over the excerpt and body of blog entries so that
* they are valid XHTML.
*
* @author Simon Brown
*/
public class TidyListener extends BlogEntryListenerSupport {
/** the log used by this class */
private static final Log log = LogFactory.getLog(TidyListener.class);
/**
* Called when a blog entry has been added.
*
* @param event a BlogEntryEvent instance
*/
public void blogEntryAdded(BlogEntryEvent event) {
tidy(event.getBlogEntry());
}
/**
* Called when a blog entry has been changed.
*
* @param event a BlogEntryEvent instance
*/
public void blogEntryChanged(BlogEntryEvent event) {
List propertyChangeEvents = event.getPropertyChangeEvents();
Iterator it = propertyChangeEvents.iterator();
while (it.hasNext()) {
PropertyChangeEvent pce = (PropertyChangeEvent)it.next();
String property = pce.getPropertyName();
if (property.equals(BlogEntry.EXCERPT_PROPERTY) ||
property.equals(BlogEntry.BODY_PROPERTY)) {
tidy(event.getBlogEntry());
}
}
}
private void tidy(BlogEntry blogEntry) {
blogEntry.setExcerpt(tidy(blogEntry.getExcerpt()));
blogEntry.setBody(tidy(blogEntry.getBody()));
}
private String tidy(String s) {
if (s != null && s.length() > 0) {
s = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n" +
"<html xmlns=\"http://www.w3.org/1999/xhtml\"><title></title><body>" + s + "</body></html>";
ByteArrayInputStream in = new ByteArrayInputStream(s.getBytes());
ByteArrayOutputStream out = new ByteArrayOutputStream();
Tidy tidy = new Tidy();
tidy.setXHTML(true);
tidy.setDocType("\"-//W3C//DTD XHTML 1.0 Transitional//EN\"");
tidy.setQuiet(true);
tidy.setShowWarnings(false);
tidy.setIndentContent(false);
tidy.setSmartIndent(false);
tidy.setIndentAttributes(false);
tidy.setWraplen(0);
Document doc = tidy.parseDOM(in, null);
tidy.pprint(doc, out);
String tidied = new String(out.toByteArray());
return tidied.substring(tidied.indexOf("<body>")+"<body>".length(), tidied.indexOf("</body>")).trim();
} else {
return "";
}
}
}