/*
* Copyright (c) 2008-2011 Mozilla Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package nu.validator.xml.dataattributes;
import nu.validator.htmlparser.impl.NCName;
import nu.validator.xml.AttributesImpl;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.ErrorHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* This wrapper removes <code>data-*</code> attributes from the pipeline and emits errors if the
* <code>data-*</code> attributes contain prohibited characters.
*
* @version $Id$
* @author hsivonen
*/
public class DataAttributeDroppingContentHandlerWrapper implements ContentHandler {
private final ContentHandler delegate;
private final ErrorHandler errorHandler;
private Locator locator = null;
/**
* @param delegate
*/
public DataAttributeDroppingContentHandlerWrapper(ContentHandler delegate, ErrorHandler errorHandler) {
this.delegate = delegate;
this.errorHandler = errorHandler;
}
/**
* @param arg0
* @param arg1
* @param arg2
* @throws SAXException
* @see org.xml.sax.ContentHandler#characters(char[], int, int)
*/
public void characters(char[] arg0, int arg1, int arg2) throws SAXException {
delegate.characters(arg0, arg1, arg2);
}
/**
* @throws SAXException
* @see org.xml.sax.ContentHandler#endDocument()
*/
public void endDocument() throws SAXException {
delegate.endDocument();
}
/**
* @param arg0
* @param arg1
* @param arg2
* @throws SAXException
* @see org.xml.sax.ContentHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
*/
public void endElement(String arg0, String arg1, String arg2)
throws SAXException {
delegate.endElement(arg0, arg1, arg2);
}
/**
* @param arg0
* @throws SAXException
* @see org.xml.sax.ContentHandler#endPrefixMapping(java.lang.String)
*/
public void endPrefixMapping(String arg0) throws SAXException {
delegate.endPrefixMapping(arg0);
}
/**
* @param arg0
* @param arg1
* @param arg2
* @throws SAXException
* @see org.xml.sax.ContentHandler#ignorableWhitespace(char[], int, int)
*/
public void ignorableWhitespace(char[] arg0, int arg1, int arg2)
throws SAXException {
delegate.ignorableWhitespace(arg0, arg1, arg2);
}
/**
* @param arg0
* @param arg1
* @throws SAXException
* @see org.xml.sax.ContentHandler#processingInstruction(java.lang.String, java.lang.String)
*/
public void processingInstruction(String arg0, String arg1)
throws SAXException {
delegate.processingInstruction(arg0, arg1);
}
/**
* @param arg0
* @see org.xml.sax.ContentHandler#setDocumentLocator(org.xml.sax.Locator)
*/
public void setDocumentLocator(Locator arg0) {
locator = arg0;
delegate.setDocumentLocator(arg0);
}
/**
* @param arg0
* @throws SAXException
* @see org.xml.sax.ContentHandler#skippedEntity(java.lang.String)
*/
public void skippedEntity(String arg0) throws SAXException {
delegate.skippedEntity(arg0);
}
/**
* @throws SAXException
* @see org.xml.sax.ContentHandler#startDocument()
*/
public void startDocument() throws SAXException {
delegate.startDocument();
}
/**
* @param ns
* @param arg1
* @param arg2
* @param attributes
* @throws SAXException
* @see org.xml.sax.ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
public void startElement(String ns, String arg1, String arg2,
Attributes attributes) throws SAXException {
if ("http://www.w3.org/1999/xhtml" == ns) {
delegate.startElement(ns, arg1, arg2, filterAttributes(attributes));
} else {
delegate.startElement(ns, arg1, arg2, attributes);
}
}
private Attributes filterAttributes(Attributes attributes) throws SAXException {
int len = attributes.getLength();
for (int i = 0; i < len; i++) {
String local = attributes.getLocalName(i);
if (local.length() > 5 && local.startsWith("data-") && attributes.getURI(i) == "") {
if (errorHandler != null) {
checkDataName(local);
}
AttributesImpl attributesImpl = new AttributesImpl();
for (int j = 0; j < i; j++) {
attributesImpl.addAttribute(attributes.getURI(j), attributes.getLocalName(j), attributes.getQName(j), attributes.getType(j), attributes.getValue(j));
}
for (int k = i + 1; k < len; k++) {
String uri = attributes.getURI(k);
local = attributes.getLocalName(k);
if (local.length() > 5 && local.startsWith("data-") && "" == uri) {
checkDataName(local);
} else {
attributesImpl.addAttribute(uri, local, attributes.getQName(k), attributes.getType(k), attributes.getValue(k));
}
}
return attributesImpl;
}
}
return attributes;
}
private void checkDataName(String local) throws SAXException {
for (int i = 5; i < local.length(); i++) {
char c = local.charAt(i);
if (c >= 'A' && c <= 'Z') {
errorHandler.error(new SAXParseException("\u201Cdata-*\u201D attributes must not have characters from the range \u201CA\u201D\u2026\u201CZ\u201D in the name.", locator));
} else if (!NCName.isNCNameTrail(c)) {
errorHandler.error(new SAXParseException("\u201Cdata-*\u201D attribute names must be XML 1.0 4th ed. plus Namespaces NCNames.", locator));
}
}
}
/**
* @param arg0
* @param arg1
* @throws SAXException
* @see org.xml.sax.ContentHandler#startPrefixMapping(java.lang.String, java.lang.String)
*/
public void startPrefixMapping(String arg0, String arg1)
throws SAXException {
delegate.startPrefixMapping(arg0, arg1);
}
}