source: josm/branch/0.5/src/org/openstreetmap/josm/data/osm/visitor/NameVisitor.java@ 329

// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm.data.osm.visitor;

import static org.openstreetmap.josm.tools.I18n.tr;
import static org.openstreetmap.josm.tools.I18n.trn;

import java.util.HashSet;
import java.util.Set;

import javax.swing.Icon;
import javax.swing.JLabel;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.osm.Relation;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.Way;
import org.openstreetmap.josm.tools.ImageProvider;

/**
 * Able to create a name and an icon for each data element.
 * 
 * @author imi
 */
public class NameVisitor implements Visitor {

        /**
         * The name of the item class
         */
        public String className;
        /**
         * The name of this item.
         */
        public String name;
        /**
         * The icon of this item.
         */
        public Icon icon;
        
        
        /**
         * If the node has a name-key or id-key, this is displayed. If not, (lat,lon)
         * is displayed.
         */
        public void visit(Node n) {
                name = n.get("name");
                if (name == null)
                        name = (n.id==0?"":""+n.id)+" ("+n.coor.lat()+","+n.coor.lon()+")";
                addId(n);
                icon = ImageProvider.get("data", "node");
                trn("node", "nodes", 0); // no marktrn available
                className = "node";
        }

        /**
         * If the way has a name-key or id-key, this is displayed. If not, (x nodes)
         * is displayed with x being the number of nodes in the way.
         */
        public void visit(Way w) {
                name = w.get("name");
                if (name == null) name = w.get("ref");
                if (name == null) {
                        String what = (w.get("highway") != null) ? "highway " : (w.get("railway") != null) ? "railway " : (w.get("waterway") != null) ? "waterway " : "";
                        name = what + trn("{0} node", "{0} nodes", w.nodes.size(), w.nodes.size());
                }
                addId(w);
                icon = ImageProvider.get("data", "way");
                trn("way", "ways", 0); // no marktrn available
                className = "way";
        }
        
        /**
         */
        public void visit(Relation e) {
                name = e.get("type");
                // FIXME add names of members
                if (name == null)
                        name = "relation";
                addId(e);
                icon = ImageProvider.get("data", "relation");
                trn("relation", "relations", 0); // no marktrn available
                className = "relation";
        }
        
        public JLabel toLabel() {
                return new JLabel(name, icon, JLabel.HORIZONTAL);
        }


        private void addId(OsmPrimitive osm) {
            if (Main.pref.getBoolean("osm-primitives.showid"))
                        name += " (id: "+osm.id+")";
    }
}