// Copyright 2001 FreeHEP.
package org.freehep.graphicsio.ps;

import java.io.IOException;
import java.io.PrintStream;

import org.freehep.graphicsio.QuadToCubicPathConstructor;

/**
 * @author Mark Donszelmann
 * @version $Id: PSPathConstructor.java,v 1.2 2002/08/28 22:44:05 duns Exp $
 */
public class PSPathConstructor extends QuadToCubicPathConstructor {
    private PrintStream os;
    private boolean intPrecision;
    private String moveto, lineto, curveto, close;

    public PSPathConstructor(PrintStream os, boolean useProlog, boolean intPrecision) {
        super();
        this.os=os;
        this.intPrecision = intPrecision;
        if (useProlog) {
            moveto = "m";
            lineto = "l";
            curveto = "c";
            close = "h";
        } else {
            moveto = "moveto";
            lineto = "lineto";
            curveto = "curveto";
            close = "closepath";
        }
    }

    public void move(double x, double y) throws IOException {
        os.println(fixedPrecision(x)+" "+fixedPrecision(y)+" "+moveto);
        super.move(x, y);
    }

    public void line(double x, double y) throws IOException {
        os.println(fixedPrecision(x)+" "+fixedPrecision(y)+" "+lineto);
        super.line(x, y);
    }


    public void cubic(double x1, double y1, double x2, double y2, double x3, double y3) throws IOException {
        os.println(fixedPrecision(x1)+" "+fixedPrecision(y1)+" "+
            fixedPrecision(x2)+" "+fixedPrecision(y2)+" "+
            fixedPrecision(x3)+" "+fixedPrecision(y3)+" "+" "+curveto);
        super.cubic(x1, y1, x2, y2, x3, y3);
    }

    public void closePath() throws IOException {
        os.println(close);
        super.closePath();
    }

    protected String fixedPrecision(double d) {
        if (intPrecision) {
            return Integer.toString((int)d);
        } else {
            String dbl = Double.toString(d);
            int index = dbl.lastIndexOf(".");
            index = Math.min(index+7,dbl.length());
            return dbl.substring(0,index);
        }
    }
}