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/*
* $Id$
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources.
*/
package org.apache.fop.fo;
// FOP
import org.apache.fop.fo.*;
import org.apache.fop.layout.FontState;
import org.apache.fop.apps.FOPException;
import org.w3c.dom.*;
import org.xml.sax.Attributes;
import javax.xml.parsers.DocumentBuilderFactory;
import java.util.*;
import java.awt.geom.Point2D;
/**
* Generic XML object.
* This is used by xml objects (other than fo) than will build a DOM
* with each element.
*/
public abstract class XMLObj extends FONode {
// temp reference for attributes
Attributes attr = null;
protected Element element;
protected Document doc;
/**
*
* @param parent the parent formatting object
* @param propertyList the explicit properties of this object
*/
public XMLObj(FONode parent) {
super(parent);
}
public void setName(String str) {
name = str;
}
public void handleAttrs(Attributes attlist) throws FOPException {
attr = attlist;
}
public Document getDocument() {
return doc;
}
public Point2D getDimension(Point2D view) {
return null;
}
public abstract String getNameSpace();
public String getDocumentNamespace() {
return getNameSpace();
}
protected static HashMap ns = new HashMap();
static {
ns.put("xlink", "http://www.w3.org/1999/xlink");
}
public void addElement(Document doc, Element parent) {
this.doc = doc;
element = doc.createElementNS(getNameSpace(), name);
for (int count = 0; count < attr.getLength(); count++) {
String rf = attr.getValue(count);
String qname = attr.getQName(count);
int idx = qname.indexOf(":");
if (idx == -1) {
element.setAttribute(qname, rf);
} else {
String pref = qname.substring(0, idx);
String tail = qname.substring(idx + 1);
if (pref.equals("xmlns")) {
ns.put(tail, rf);
} else {
element.setAttributeNS((String)ns.get(pref), tail, rf);
}
}
}
attr = null;
parent.appendChild(element);
}
public void buildTopLevel(Document doc, Element svgRoot) {
// build up the info for the top level element
for (int count = 0; count < attr.getLength(); count++) {
String rf = attr.getValue(count);
String qname = attr.getQName(count);
int idx = qname.indexOf(":");
if (idx == -1) {
element.setAttribute(qname, rf);
} else {
String pref = qname.substring(0, idx);
String tail = qname.substring(idx + 1);
if (pref.equals("xmlns")) {
ns.put(tail, rf);
} else {
element.setAttributeNS((String)ns.get(pref), tail, rf);
}
}
}
}
public Document createBasicDocument() {
doc = null;
element = null;
try {
DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
fact.setNamespaceAware(true);
doc = fact.newDocumentBuilder().newDocument();
Element el = doc.createElement(name);
doc.appendChild(el);
element = doc.getDocumentElement();
buildTopLevel(doc, element);
} catch (Exception e) {
e.printStackTrace();
}
return doc;
}
protected void addChild(FONode child) {
if (child instanceof XMLObj) {
((XMLObj)child).addElement(doc, element);
} else {
// in theory someone might want to embed some defined
// xml (eg. fo) inside the foreign xml
// they could use a different namespace
getLogger().debug("Invalid element: " + child.getName() + " inside foreign xml markup");
}
}
protected void addCharacters(char data[], int start, int length) {
String str = new String(data, start, length - start);
org.w3c.dom.Text text = doc.createTextNode(str);
element.appendChild(text);
}
}
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