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.List;
011import java.util.concurrent.Future;
012import java.util.stream.Collectors;
013
014import org.openstreetmap.josm.actions.downloadtasks.DownloadTaskList;
015import org.openstreetmap.josm.gui.layer.OsmDataLayer;
016import org.openstreetmap.josm.gui.progress.swing.PleaseWaitProgressMonitor;
017import org.openstreetmap.josm.io.NetworkManager;
018import org.openstreetmap.josm.io.OnlineResource;
019import org.openstreetmap.josm.spi.preferences.Config;
020import org.openstreetmap.josm.tools.Shortcut;
021
022/**
023 * This action synchronizes the dataset with the current state on the server.
024 *
025 * It does so by re-downloading all areas and thereby merging all compatible
026 * changes from the current server version.
027 */
028public class UpdateDataAction extends JosmAction {
029
030    /**
031     * Constructs a new {@code UpdateDataAction}.
032     */
033    public UpdateDataAction() {
034        super(tr("Update data"),
035                "updatedata",
036                tr("Updates the objects in the active data layer from the server."),
037                Shortcut.registerShortcut("file:updatedata",
038                        tr("File: {0}", tr("Update data")),
039                        KeyEvent.VK_U, Shortcut.CTRL),
040                true);
041        setHelpId(ht("/Action/UpdateData"));
042    }
043
044    @Override
045    protected boolean listenToSelectionChange() {
046        return false;
047    }
048
049    /**
050     * Refreshes the enabled state
051     */
052    @Override
053    protected void updateEnabledState() {
054        OsmDataLayer editLayer = getLayerManager().getEditLayer();
055        setEnabled(editLayer != null && editLayer.isDownloadable() && !NetworkManager.isOffline(OnlineResource.OSM_API));
056    }
057
058    @Override
059    public void actionPerformed(ActionEvent e) {
060        OsmDataLayer editLayer = getLayerManager().getEditLayer();
061        if (!isEnabled() || editLayer == null || !editLayer.isDownloadable())
062            return;
063
064        List<Area> areas = editLayer.data.getDataSources().stream()
065                .map(ds -> new Area(ds.bounds.asRect()))
066                .collect(Collectors.toList());
067
068        // The next two blocks removes every intersection from every DataSource Area
069        // This prevents downloading the same data numerous times at intersections
070        // and also skips smaller bounding boxes that are contained within larger ones entirely.
071        for (int i = 0; i < areas.size(); i++) {
072            for (int j = i+1; j < areas.size(); j++) {
073                areas.get(i).subtract(areas.get(j));
074            }
075        }
076
077        for (int i = areas.size()-1; i > 0; i--) {
078            for (int j = i-1; j > 0; j--) {
079                areas.get(i).subtract(areas.get(j));
080            }
081        }
082
083        List<Area> areasToDownload = areas.stream()
084                .filter(a -> !a.isEmpty())
085                .collect(Collectors.toList());
086
087        if (areasToDownload.isEmpty()) {
088            // no bounds defined in the dataset? We update all but the incomplete primitives in the data set
089            UpdateSelectionAction.updatePrimitives(editLayer.data.allPrimitives().stream()
090                    .filter(p -> !p.isNew() && !p.isIncomplete()).collect(Collectors.toList()));
091        } else {
092            // bounds defined? => use the bbox downloader
093            final PleaseWaitProgressMonitor monitor = new PleaseWaitProgressMonitor(tr("Download data"));
094            final Future<?> future = new DownloadTaskList(Config.getPref().getBoolean("update.data.zoom-after-download"))
095                    .download(false /* no new layer */, areasToDownload, true, false, monitor);
096            waitFuture(future, monitor);
097        }
098    }
099}