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/*-- $Id$ --
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. 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.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Fop" and "Apache Software Foundation" must not be used to
endorse or promote products derived from this software without prior
written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, 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.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
James Tauber <jtauber@jtauber.com>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.fo;
// FOP
import org.apache.fop.layout.AreaTree;
import org.apache.fop.messaging.MessageHandler;
import org.apache.fop.apps.FOPException;
import org.apache.fop.fo.pagination.Root;
// SAX
import org.xml.sax.SAXException;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.AttributesImpl;
import org.xml.sax.DocumentHandler;
import org.xml.sax.AttributeList;
// Java
import java.util.Hashtable;
import java.util.Stack;
import java.io.IOException;
/**
* SAX Handler that builds the formatting object tree.
*/
//public class XTFOTreeBuilder extends HandlerBase {
public class XTFOTreeBuilder extends FOTreeBuilder
implements DocumentHandler {
// namespace implementation ideas pinched from John Cowan
protected static class NSMap {
String prefix;
String uri;
int level;
NSMap(String prefix, String uri, int level) {
this.prefix = prefix;
this.uri = uri;
this.level = level;
}
}
protected int level = 0;
protected String m_uri = null;
protected String m_localPart = null;
protected Stack namespaceStack = new Stack();
{
namespaceStack.push(new NSMap("xml",
"http://www.w3.org/XML/1998/namespace",
-1));
namespaceStack.push(new NSMap("", "", -1));
}
protected String findURI(String prefix) {
for (int i = namespaceStack.size() - 1; i >= 0; i--) {
NSMap nsMap = (NSMap) (namespaceStack.elementAt(i));
if (prefix.equals(nsMap.prefix)) return nsMap.uri;
}
return null;
}
protected String mapName(String name)
throws SAXException {
int colon = name.indexOf(':');
String prefix = "";
m_localPart = name;
if (colon != -1) {
prefix = name.substring(0, colon);
m_localPart = name.substring(colon + 1);
}
m_uri = findURI(prefix);
if (m_uri == null) {
if (prefix.equals("")) {
return name;
} else {
throw new SAXException(new FOPException("Unknown namespace prefix " + prefix));
}
}
return m_uri + "^" + m_localPart;
}
/** SAX1 Handler for the end of an element */
public void endElement(String rawName) throws SAXException {
mapName(rawName);
super.endElement(m_uri, m_localPart, rawName);
level--;
while (((NSMap) namespaceStack.peek()).level > level) {
namespaceStack.pop();
}
}
/** SAX1 Handler for the start of an element */
public void startElement(String rawName, AttributeList attlist)
throws SAXException {
// SAX2 version of AttributeList
AttributesImpl newAttrs = new AttributesImpl();
level++;
int length = attlist.getLength();
for (int i = 0; i < length; i++) {
String att = attlist.getName(i);
if (att.equals("xmlns")) {
namespaceStack.push( new NSMap("",
attlist.getValue(i),
level));
} else if (att.startsWith("xmlns:")) {
String value = attlist.getValue(i);
namespaceStack.push(new NSMap(att.substring(6), value,
level));
} else {
mapName(att);
newAttrs.addAttribute(m_uri, m_localPart, att,
attlist.getType(i), attlist.getValue(i));
}
}
mapName(rawName);
super.startElement(m_uri, m_localPart, rawName, newAttrs);
}
}
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