package graph.dot;
import graph.*;
import graph.filter.*;
import java.util.Hashtable;
import java.util.Enumeration;
import java.awt.*;

/**
 * Take DOT attributes and map them onto the display.
 *
 * @see	DotParser
 * @author Michael Shilman (michaels@eecs.berkeley.edu)
 * @version $Id$
 */
public class DotFilter implements Filter {
	public static int s_dotIndex = AttributeManager.NO_INDEX;
	
	DotFilter() {
        if(s_dotIndex == AttributeManager.NO_INDEX) {
        	s_dotIndex = AttributeManager.getIndex("Dot");
        }	
	}
	
	public String getName() { return "Dot"; }
	
	public void apply(Node n) {
        DotInfo info = (DotInfo)n.getAttr(s_dotIndex);
		if(info.firstTime && (info != null) && (info.props != null)) {
			Enumeration keys = info.props.keys();
			Enumeration vals = info.props.elements();
			while(keys.hasMoreElements() && vals.hasMoreElements()) {
				String key = (String)keys.nextElement();
				String val = (String)vals.nextElement();
				if(key.equals("pos")) {
					filterPos(info, val);
				}
				else if(key.equals("width")) {
					filterWidth(info, val);
				}
				else if(key.equals("height")) {
					filterHeight(info, val);
				}
				else if(key.equals("color")) {
					//XXX color info
					System.out.println("DOT Color not yet implemented.");
				}
			}
			info.firstTime = false;
		}
		
		n.x = info.x;
		n.y = info.y;
		n.w = info.w;
		n.h = info.h;
		
//		System.out.println(">>>> FILTERING: " + n.name + ", " + n.x + ", " + n.y + ", " + n.w + ", " + n.h );
	}
	
	static void filterWidth(DotInfo info, String val) {
		Float w = new Float(val);
		info.w = (int)(10*w.floatValue());
	}
	
	static void filterHeight(DotInfo info, String val) {
		Float h = new Float(val);
		info.h = (int)(10*h.floatValue());
	}
	
	static void filterPos(DotInfo info, String val) {
		int comma = val.indexOf(',');
		Integer x = new Integer(val.substring(0,comma));
		Integer y = new Integer(val.substring(comma+1));
		System.out.println("Filter pos to: " + x + ", " + y);
		info.x = x.intValue();
		info.y = y.intValue();
	}
	
	public Frame buildGUI() {
		return new Frame("Dot Filter");
	}
	
	public Component buildThumbnail() {
		return null;
	}
}