package org.newdawn.slick.svg.inkscape;
import java.util.StringTokenizer;
import org.newdawn.slick.geom.Line;
import org.newdawn.slick.geom.Polygon;
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 <line> element
*
* @author kevin
*/
public class LineProcessor 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;
while (tokens.hasMoreTokens()) {
String nextToken = tokens.nextToken();
if (nextToken.equals("L")) {
continue;
}
if (nextToken.equals("z")) {
break;
}
if (nextToken.equals("M")) {
continue;
}
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);
float x1;
float y1;
float x2;
float y2;
if (element.getNodeName().equals("line")) {
x1 = Float.parseFloat(element.getAttribute("x1"));
x2 = Float.parseFloat(element.getAttribute("x2"));
y1 = Float.parseFloat(element.getAttribute("y1"));
y2 = Float.parseFloat(element.getAttribute("y2"));
} else {
String points = element.getAttribute("d");
StringTokenizer tokens = new StringTokenizer(points, ", ");
Polygon poly = new Polygon();
if (processPoly(poly, element, tokens) == 2) {
x1 = poly.getPoint(0)[0];
y1 = poly.getPoint(0)[1];
x2 = poly.getPoint(1)[0];
y2 = poly.getPoint(1)[1];
} else {
return;
}
}
float[] in = new float[] {x1,y1,x2,y2};
float[] out = new float[4];
transform.transform(in,0,out,0,2);
Line line = new Line(out[0],out[1],out[2],out[3]);
NonGeometricData data = Util.getNonGeometricData(element);
data.addAttribute("x1",""+x1);
data.addAttribute("x2",""+x2);
data.addAttribute("y1",""+y1);
data.addAttribute("y2",""+y2);
diagram.addFigure(new Figure(Figure.LINE, line, data, transform));
}
/**
* @see org.newdawn.slick.svg.inkscape.ElementProcessor#handles(org.w3c.dom.Element)
*/
public boolean handles(Element element) {
if (element.getNodeName().equals("line")) {
return true;
}
if (element.getNodeName().equals("path")) {
if (!"arc".equals(element.getAttributeNS(Util.SODIPODI, "type"))) {
return true;
}
}
return false;
}
}