SubNode.java

package com.pixelmaid.dresscode.antlr.types.tree;



import java.util.List;

import com.pixelmaid.dresscode.antlr.types.VarType;
import com.pixelmaid.dresscode.drawing.math.PolyBoolean;
import com.pixelmaid.dresscode.drawing.primitive2d.Drawable;
import com.pixelmaid.dresscode.events.CustomEvent;

public class SubNode extends NodeEvent implements DCNode {

    private DCNode lhs;
    private DCNode rhs;
    //protected int line;
    
    public SubNode(DCNode lhs, DCNode rhs) {
        this.lhs = lhs;
        this.rhs = rhs;
        //line = l;
    }

    @Override
    public VarType evaluate() {

        VarType a = lhs.evaluate();
        VarType b = rhs.evaluate();

        // number - number
        if(a.isNumber() && b.isNumber()) {
            return new VarType(a.asDouble() - b.asDouble());
        }

        // list - any
        if(a.isList()) {
            List<VarType> list = a.asList();
            list.remove(b);
            return new VarType(list);
        }
        
        if(a.isDrawable() && b.isDrawable()) {
        	Drawable aP = a.asDrawable();
        	Drawable bP = b.asDrawable();
        	this.fireDrawableEvent(CustomEvent.REMOVE_DRAWABLE, aP);
        	this.fireDrawableEvent(CustomEvent.REMOVE_DRAWABLE, bP);
        	
        	Drawable d = PolyBoolean.difference(aP,bP);
        	 //TODO: add actual line number instead of 0 here
        	this.fireDrawableEvent(CustomEvent.DRAWABLE_CREATED, d);
        	//d.setLine(line);
        	return new VarType(d);
          }

        throw new RuntimeException("illegal expression: " + this);
    }

    @Override
    public String toString() {
        return String.format("(%s - %s)", lhs, rhs);
    }
}