001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.actions;
003
004import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
005import static org.openstreetmap.josm.tools.I18n.tr;
006
007import java.awt.event.ActionEvent;
008import java.awt.event.KeyEvent;
009import java.awt.geom.Area;
010import java.util.ArrayList;
011import java.util.List;
012import java.util.concurrent.Future;
013
014import org.openstreetmap.josm.Main;
015import org.openstreetmap.josm.actions.downloadtasks.DownloadTaskList;
016import org.openstreetmap.josm.data.osm.DataSource;
017import org.openstreetmap.josm.gui.layer.OsmDataLayer;
018import org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor;
019import org.openstreetmap.josm.tools.Shortcut;
020
021public class UpdateDataAction extends JosmAction{
022    public UpdateDataAction() {
023        super(tr("Update data"),
024                "updatedata",
025                tr("Updates the objects in the active data layer from the server."),
026                Shortcut.registerShortcut("file:updatedata",
027                        tr("File: {0}", tr("Update data")),
028                        KeyEvent.VK_U, Shortcut.CTRL),
029                true);
030        putValue("help", ht("/Action/UpdateData"));
031    }
032
033    /**
034     * Refreshes the enabled state
035     *
036     */
037    @Override
038    protected void updateEnabledState() {
039        setEnabled(getEditLayer() != null);
040    }
041
042    public void updateLayer(OsmDataLayer layer) {
043
044    }
045
046    @Override
047    public void actionPerformed(ActionEvent e) {
048        if (! isEnabled())
049            return;
050        if (getEditLayer() == null)
051            return;
052
053        List<Area> areas = new ArrayList<>();
054        for(DataSource ds : getEditLayer().data.dataSources) {
055            areas.add(new Area(ds.bounds.asRect()));
056        }
057
058        // The next two blocks removes every intersection from every DataSource Area
059        // This prevents downloading the same data numerous times at intersections
060        // and also skips smaller bounding boxes that are contained within larger ones
061        // entirely.
062        for(int i = 0; i < areas.size(); i++) {
063            for(int j = i+1; j < areas.size(); j++) {
064                areas.get(i).subtract(areas.get(j));
065            }
066        }
067
068        for(int i = areas.size()-1; i > 0 ; i--) {
069            for(int j = i-1; j > 0; j--) {
070                areas.get(i).subtract(areas.get(j));
071            }
072        }
073
074        List<Area> areasToDownload = new ArrayList<>();
075        for(Area a : areas) {
076            if(a.isEmpty()) {
077                continue;
078            }
079            areasToDownload.add(a);
080        }
081
082        if(areasToDownload.isEmpty()) {
083            // no bounds defined in the dataset? we update all primitives in the data set
084            // using a series of multi fetch requests
085            //
086            UpdateSelectionAction.updatePrimitives(getEditLayer().data.allPrimitives());
087        } else {
088            // bounds defined? => use the bbox downloader
089            //
090            final PleaseWaitProgressMonitor monitor = new PleaseWaitProgressMonitor(tr("Download data"));
091            final Future<?> future = new DownloadTaskList().download(false /* no new layer */, areasToDownload, true, false, monitor);
092            Main.worker.submit(
093                    new Runnable() {
094                        @Override
095                        public void run() {
096                            try {
097                                future.get();
098                            } catch(Exception e) {
099                                Main.error(e);
100                                return;
101                            }
102                            monitor.close();
103                        }
104                    }
105            );
106        }
107    }
108}