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