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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.mathml;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.geom.Point2D;
import org.apache.fop.fo.FONode;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
import org.apache.batik.svggen.SVGGraphics2D;
import org.apache.batik.dom.svg.SVGDOMImplementation;
import net.sourceforge.jeuclid.MathBase;
import net.sourceforge.jeuclid.DOMMathBuilder;
/**
* Defines the top-level element for MathML.
*/
public class MathMLElement extends MathMLObj {
private Document svgDoc = null;
private float width;
private float height;
private boolean converted = false;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public MathMLElement(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FONode#processNode
*/
public void processNode(String elementName, Locator locator,
Attributes attlist) throws SAXParseException {
super.processNode(elementName, locator, attlist);
createBasicDocument();
}
/**
* Converts the MathML to SVG.
*/
public void convertToSVG() {
try {
if (!converted) {
converted = true;
String fontname = "Helvetica";
int fontstyle = 0;
int inlinefontstyle = 0;
int displayfontsize = 12;
int inlinefontsize = 12;
MathBase base = new MathBase(
(new DOMMathBuilder(doc)).getMathRootElement(),
fontname, fontstyle, inlinefontsize,
displayfontsize);
base.setDebug(false);
svgDoc = createSVG(base);
width = base.getWidth();
height = base.getHeight();
doc = svgDoc;
}
} catch (Throwable t) {
getLogger().error("Could not convert MathML to SVG", t);
width = 0;
height = 0;
}
}
/**
* Create the SVG from MathML.
* @return the DOM document containing SVG
*/
public static Document createSVG(MathBase base) {
DOMImplementation impl =
SVGDOMImplementation.getDOMImplementation();
String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;
Document svgdocument = impl.createDocument(svgNS, "svg", null);
SVGGraphics2D g = new SVGGraphics2D(svgdocument);
g.setSVGCanvasSize(
new Dimension(base.getWidth(), base.getHeight()));
//g.setColor(Color.white);
//g.fillRect(0, 0, base.getWidth(), base.getHeight());
g.setColor(Color.black);
base.paint(g);
//if (antialiasing)
//element.setAttribute("text-rendering", "optimizeLegibility");
//else
//element.setAttribute("text-rendering", "geometricPrecision");
// this should be done in a better way
Element root = g.getRoot();
svgdocument = impl.createDocument(svgNS, "svg", null);
Node node = svgdocument.importNode(root, true);
((org.apache.batik.dom.svg.SVGOMDocument) svgdocument).
getRootElement().appendChild(node);
return svgdocument;
}
/**
* @see org.apache.fop.fo.XMLObj#getDocument()
*/
public Document getDocument() {
convertToSVG();
return doc;
}
/**
* @see org.apache.fop.fo.XMLObj#getDocumentNamespace()
*/
public String getDocumentNamespace() {
if (svgDoc == null) {
return MathMLElementMapping.NAMESPACE;
}
return "http://www.w3.org/2000/svg";
}
/**
* @see org.apache.fop.fo.XMLObj#getDimension(Point2D)
*/
public Point2D getDimension(Point2D view) {
convertToSVG();
return new Point2D.Float(width, height);
}
}
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