001    // License: GPL. For details, see LICENSE file.
002    package org.openstreetmap.josm.actions;
003    
004    import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
005    import static org.openstreetmap.josm.tools.I18n.tr;
006    
007    import java.awt.event.ActionEvent;
008    import java.awt.event.KeyEvent;
009    import java.awt.geom.Area;
010    import java.util.ArrayList;
011    import java.util.List;
012    import java.util.concurrent.Future;
013    
014    import org.openstreetmap.josm.Main;
015    import org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTaskList;
016    import org.openstreetmap.josm.data.osm.DataSource;
017    import org.openstreetmap.josm.gui.layer.OsmDataLayer;
018    import org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor;
019    import org.openstreetmap.josm.tools.Shortcut;
020    
021    public 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        public void actionPerformed(ActionEvent e) {
047            if (! isEnabled())
048                return;
049            if (getEditLayer() == null)
050                return;
051    
052            List<Area> areas = new ArrayList<Area>();
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<Area>();
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                new 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 DownloadOsmTaskList().download(false /* no new layer */, areasToDownload, monitor);
091                Main.worker.submit(
092                        new Runnable() {
093                            public void run() {
094                                try {
095                                    future.get();
096                                } catch(Exception e) {
097                                    e.printStackTrace();
098                                    return;
099                                }
100                                monitor.close();
101                            }
102                        }
103                );
104            }
105        }
106    }