package org.newdawn.slick.svg.inkscape;
import java.util.ArrayList;
import java.util.StringTokenizer;
import org.newdawn.slick.geom.Polygon;
import org.newdawn.slick.geom.Shape;
import org.newdawn.slick.geom.Transform;
import org.newdawn.slick.svg.Diagram;
import org.newdawn.slick.svg.Figure;
import org.newdawn.slick.svg.Loader;
import org.newdawn.slick.svg.NonGeometricData;
import org.newdawn.slick.svg.ParsingException;
import org.w3c.dom.Element;
/**
* A processor for the <polygon> and <path> elements marked as not an arc.
*
* @author kevin
*/
public class PolygonProcessor implements ElementProcessor {
/**
* Process the points in a polygon definition
*
* @param poly The polygon being built
* @param element The XML element being read
* @param tokens The tokens representing the path
* @return The number of points found
* @throws ParsingException Indicates an invalid token in the path
*/
private static int processPoly(Polygon poly, Element element, StringTokenizer tokens) throws ParsingException {
int count = 0;
ArrayList pts = new ArrayList();
boolean moved = false;
while (tokens.hasMoreTokens()) {
String nextToken = tokens.nextToken();
if (nextToken.equals("L")) {
continue;
}
if (nextToken.equals("z")) {
break;
}
if (nextToken.equals("M")) {
if (!moved) {
moved = true;
continue;
}
return 0;
}
if (nextToken.equals("C")) {
return 0;
}
String tokenX = nextToken;
String tokenY = tokens.nextToken();
try {
float x = Float.parseFloat(tokenX);
float y = Float.parseFloat(tokenY);
poly.addPoint(x,y);
count++;
} catch (NumberFormatException e) {
throw new ParsingException(element.getAttribute("id"), "Invalid token in points list", e);
}
}
return count;
}
/**
* @see org.newdawn.slick.svg.inkscape.ElementProcessor#process(org.newdawn.slick.svg.Loader, org.w3c.dom.Element, org.newdawn.slick.svg.Diagram, org.newdawn.slick.geom.Transform)
*/
public void process(Loader loader, Element element, Diagram diagram, Transform t) throws ParsingException {
Transform transform = Util.getTransform(element);
transform = new Transform(transform, t);
String points = element.getAttribute("points");
if (element.getNodeName().equals("path")) {
points = element.getAttribute("d");
}
StringTokenizer tokens = new StringTokenizer(points, ", ");
Polygon poly = new Polygon();
int count = processPoly(poly, element, tokens);
NonGeometricData data = Util.getNonGeometricData(element);
if (count > 3) {
Shape shape = poly.transform(transform);
diagram.addFigure(new Figure(Figure.POLYGON, shape, data, transform));
}
}
/**
* @see org.newdawn.slick.svg.inkscape.ElementProcessor#handles(org.w3c.dom.Element)
*/
public boolean handles(Element element) {
if (element.getNodeName().equals("polygon")) {
return true;
}
if (element.getNodeName().equals("path")) {
if (!"arc".equals(element.getAttributeNS(Util.SODIPODI, "type"))) {
return true;
}
}
return false;
}
}