public void paint(Graphics2D g, Node dom, Rectangle2D viewRect) throws InvalidXMLException {
if (g == null) throw new NullPointerException("g is null");
if (dom == null) throw new NullPointerException("dom is null");
Element root = null;
if (dom.getNodeType() == Node.DOCUMENT_NODE) {
root = Document.class.cast(dom).getDocumentElement();
} else if (dom.getNodeType() == Node.ELEMENT_NODE) {
root = Element.class.cast(dom);
}
if (root == null) throw new InvalidXMLException(dom, "no root");
if (!XMLUtilities.isA(root, SVG.NS, "svg"))
throw new InvalidXMLException(root, "not a SVG root");
Dimension2D srcSize = getSize(root);
Rectangle2D viewBox = null;
Attr viewBoxAttr = root.getAttributeNode("viewBox");
if (viewBoxAttr != null) {
String tokens[] = viewBoxAttr.getValue().trim().split("[ \t\n]+");
if (tokens.length != 4) throw new InvalidXMLException(viewBoxAttr, "invalid ");
viewBox =
new Rectangle2D.Double(
Double.parseDouble(tokens[0]),
Double.parseDouble(tokens[1]),
Double.parseDouble(tokens[2]),
Double.parseDouble(tokens[3]));
srcSize = new Dimension2D.Double(viewBox.getWidth(), viewBox.getHeight());
}
AffineTransform originalTr = null;
if (viewRect == null) {
viewRect = new Rectangle2D.Double(0, 0, srcSize.getWidth(), srcSize.getHeight());
} else {
if (srcSize.getWidth() > 0 && srcSize.getHeight() > 0) {
originalTr = g.getTransform();
double ratio =
Math.min(
viewRect.getWidth() / srcSize.getWidth(),
viewRect.getHeight() / srcSize.getHeight());
g.translate(
(viewRect.getWidth() - srcSize.getWidth() * ratio) / 2.0,
(viewRect.getHeight() - srcSize.getHeight() * ratio) / 2.0);
g.scale(ratio, ratio);
}
}
Shape oldclip = g.getClip();
Shuttle shuttle = new Shuttle(g, root);
if (viewBox != null) {
AffineTransform tr = AffineTransform.getTranslateInstance(-viewBox.getX(), -viewBox.getY());
shuttle.transform.concatenate(tr);
Area area = new Area(shuttle.clip);
area.intersect(
new Area(new Rectangle2D.Double(0, 0, viewBox.getWidth(), viewBox.getHeight())));
shuttle.clip = area;
}
paint(shuttle);
if (originalTr != null) {
g.setTransform(originalTr);
}
g.setClip(oldclip);
}
