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

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.Collection;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.gui.history.HistoryBrowserDialogManager;
import org.openstreetmap.josm.tools.Shortcut;

import static org.openstreetmap.josm.tools.I18n.tr;
import static org.openstreetmap.josm.gui.help.HelpUtil.ht;

public class HistoryInfoAction extends JosmAction {

    public HistoryInfoAction() {
        super(tr("History"), "about",
                tr("Display history information about OSM ways, nodes, or relations."),
                Shortcut.registerShortcut("core:historyinfo",
                tr("History"), KeyEvent.VK_H, Shortcut.CTRL), false);
        putValue("help", ht("/Action/ObjectHistory"));
        putValue("toolbar", "action/historyinfo");
        Main.toolbar.register(this);
    }

    @Override
    public void actionPerformed(ActionEvent ae) {
        DataSet set = getCurrentDataSet();
        if (set != null) {
            HistoryBrowserDialogManager.getInstance().showHistory(set.getAllSelected());
        }
    }

    @Override
    public void updateEnabledState() {
        if (getCurrentDataSet() == null) {
            setEnabled(false);
        } else {
            updateEnabledState(getCurrentDataSet().getAllSelected());
        }
    }

    @Override
    protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
        setEnabled(!selection.isEmpty());
    }
}