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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.svg;
// FOP
import org.apache.fop.fo.*;
import org.apache.fop.layout.Area;
import org.apache.fop.layout.FontState;
import org.apache.fop.apps.FOPException;
import org.apache.fop.layout.LinkSet;
import org.w3c.dom.*;
import java.util.*;
/**
* Since SVG objects are not layed out then this class checks
* that this element is not being layed out inside some incorrect
* element.
*/
public abstract class XMLObj extends FObj {
protected String tagName = "";
protected String[] props = {};
/**
*
* @param parent the parent formatting object
* @param propertyList the explicit properties of this object
*/
public XMLObj(FObj parent, PropertyList propertyList) {
super(parent, propertyList);
}
public abstract String getNameSpace();
protected static Hashtable ns = new Hashtable();
public void addGraphic(Document doc, Element parent) {
Element element = doc.createElementNS(getNameSpace(), tagName);
// Element element = doc.createElement(tagName);
for (int count = 0; count < props.length; count++) {
if (this.properties.get(props[count]) != null) {
String rf = this.properties.get(props[count]).getString();
if (rf != null) {
if (props[count].indexOf(":") == -1) {
element.setAttribute(props[count], rf);
} else {
String pref = props[count].substring(0,
props[count].indexOf(":"));
if (pref.equals("xmlns")) {
ns.put(props[count].substring(
props[count].indexOf(":") + 1), rf);
}
ns.put("xlink", "http://www.w3.org/1999/xlink");
element.setAttributeNS((String) ns.get(pref),
props[count], rf);
}
}
}
}
parent.appendChild(element);
int numChildren = this.children.size();
for (int i = 0; i < numChildren; i++) {
Object child = children.elementAt(i);
if (child instanceof XMLObj) {
((XMLObj) child).addGraphic(doc, element);
} else if (child instanceof String) {
org.w3c.dom.Text text = doc.createTextNode((String) child);
element.appendChild(text);
}
}
}
public void buildTopLevel(Document doc, Element svgRoot) {
// build up the info for the top level element
for (int count = 0; count < props.length; count++) {
if (this.properties.get(props[count]) != null) {
String rf = this.properties.get(props[count]).getString();
if (rf != null)
svgRoot.setAttributeNS(null, props[count], rf);
}
}
//doc.appendChild(topLevel);
int numChildren = this.children.size();
for (int i = 0; i < numChildren; i++) {
Object child = children.elementAt(i);
if (child instanceof XMLObj) {
((XMLObj) child).addGraphic(doc, svgRoot);
} else if (child instanceof String) {
org.w3c.dom.Text text = doc.createTextNode((String) child);
svgRoot.appendChild(text);
}
}
}
public Document createBasicDocument() {
Document doc = null;
Element svgRoot = null;
try {
// DOMImplementation impl = javax.xml.parsers.DocumentBuilderFactory.newInstance().newDocumentBuilder().getDOMImplementation();
// String ns = GraphElementMapping.URI;
// doc = impl.createDocument(ns, "graph", null);
doc = javax.xml.parsers.DocumentBuilderFactory.newInstance().
newDocumentBuilder().newDocument();
Element el = doc.createElement("graph");
doc.appendChild(el);
svgRoot = doc.getDocumentElement();
buildTopLevel(doc, svgRoot);
} catch (Exception e) {
e.printStackTrace();
}
return doc;
}
/**
* layout this formatting object.
*
* @param area the area to layout the object into
* @return the status of the layout
*/
public Status layout(Area area) throws FOPException {
/* generate a warning */
System.err.println("WARNING: " + this.name + " outside foreign xml");
/* return status */
return new Status(Status.OK);
}
/**
* These method overrides prevent problems with the different types.
*/
public void setIsInTableCell() {
}
public void forceStartOffset(int offset) {
}
public void forceWidth(int width) {
}
public void resetMarker() {
}
public void setLinkSet(LinkSet linkSet) {
}
public Vector getMarkerSnapshot(Vector snapshot) {
return snapshot;
}
public void rollback(Vector snapshot) {
}
}
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