001    // License: GPL. Copyright 2007 by Immanuel Scholz and others
002    package org.openstreetmap.josm;
003    import static org.openstreetmap.josm.tools.I18n.tr;
004    
005    import java.awt.BorderLayout;
006    import java.awt.Component;
007    import java.awt.GridBagConstraints;
008    import java.awt.GridBagLayout;
009    import java.awt.Window;
010    import java.awt.event.ComponentEvent;
011    import java.awt.event.ComponentListener;
012    import java.awt.event.KeyEvent;
013    import java.awt.event.WindowAdapter;
014    import java.awt.event.WindowEvent;
015    import java.io.File;
016    import java.lang.ref.WeakReference;
017    import java.net.URI;
018    import java.net.URISyntaxException;
019    import java.text.MessageFormat;
020    import java.util.ArrayList;
021    import java.util.Arrays;
022    import java.util.Collection;
023    import java.util.Iterator;
024    import java.util.List;
025    import java.util.Map;
026    import java.util.StringTokenizer;
027    import java.util.concurrent.Callable;
028    import java.util.concurrent.ExecutorService;
029    import java.util.concurrent.Executors;
030    import java.util.concurrent.Future;
031    
032    import javax.swing.Action;
033    import javax.swing.InputMap;
034    import javax.swing.JComponent;
035    import javax.swing.JFrame;
036    import javax.swing.JLabel;
037    import javax.swing.JOptionPane;
038    import javax.swing.JPanel;
039    import javax.swing.JTextArea;
040    import javax.swing.KeyStroke;
041    import javax.swing.UIManager;
042    
043    import org.openstreetmap.gui.jmapviewer.FeatureAdapter;
044    import org.openstreetmap.josm.actions.JosmAction;
045    import org.openstreetmap.josm.actions.OpenFileAction;
046    import org.openstreetmap.josm.actions.downloadtasks.DownloadGpsTask;
047    import org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask;
048    import org.openstreetmap.josm.actions.downloadtasks.DownloadTask;
049    import org.openstreetmap.josm.actions.downloadtasks.PostDownloadHandler;
050    import org.openstreetmap.josm.actions.mapmode.MapMode;
051    import org.openstreetmap.josm.actions.search.SearchAction;
052    import org.openstreetmap.josm.data.Bounds;
053    import org.openstreetmap.josm.data.Preferences;
054    import org.openstreetmap.josm.data.UndoRedoHandler;
055    import org.openstreetmap.josm.data.coor.CoordinateFormat;
056    import org.openstreetmap.josm.data.coor.LatLon;
057    import org.openstreetmap.josm.data.osm.DataSet;
058    import org.openstreetmap.josm.data.osm.PrimitiveDeepCopy;
059    import org.openstreetmap.josm.data.projection.Projection;
060    import org.openstreetmap.josm.data.projection.ProjectionChangeListener;
061    import org.openstreetmap.josm.data.validation.OsmValidator;
062    import org.openstreetmap.josm.gui.GettingStarted;
063    import org.openstreetmap.josm.gui.MainApplication.Option;
064    import org.openstreetmap.josm.gui.MainMenu;
065    import org.openstreetmap.josm.gui.MapFrame;
066    import org.openstreetmap.josm.gui.MapView;
067    import org.openstreetmap.josm.gui.dialogs.LayerListDialog;
068    import org.openstreetmap.josm.gui.io.SaveLayersDialog;
069    import org.openstreetmap.josm.gui.layer.Layer;
070    import org.openstreetmap.josm.gui.layer.OsmDataLayer;
071    import org.openstreetmap.josm.gui.layer.OsmDataLayer.CommandQueueListener;
072    import org.openstreetmap.josm.gui.preferences.ToolbarPreferences;
073    import org.openstreetmap.josm.gui.preferences.imagery.ImageryPreference;
074    import org.openstreetmap.josm.gui.preferences.map.MapPaintPreference;
075    import org.openstreetmap.josm.gui.preferences.map.TaggingPresetPreference;
076    import org.openstreetmap.josm.gui.preferences.projection.ProjectionPreference;
077    import org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor;
078    import org.openstreetmap.josm.gui.progress.ProgressMonitorExecutor;
079    import org.openstreetmap.josm.gui.util.RedirectInputMap;
080    import org.openstreetmap.josm.io.OsmApi;
081    import org.openstreetmap.josm.plugins.PluginHandler;
082    import org.openstreetmap.josm.tools.CheckParameterUtil;
083    import org.openstreetmap.josm.tools.I18n;
084    import org.openstreetmap.josm.tools.ImageProvider;
085    import org.openstreetmap.josm.tools.OpenBrowser;
086    import org.openstreetmap.josm.tools.OsmUrlToBounds;
087    import org.openstreetmap.josm.tools.PlatformHook;
088    import org.openstreetmap.josm.tools.PlatformHookOsx;
089    import org.openstreetmap.josm.tools.PlatformHookUnixoid;
090    import org.openstreetmap.josm.tools.PlatformHookWindows;
091    import org.openstreetmap.josm.tools.Shortcut;
092    import org.openstreetmap.josm.tools.Utils;
093    import org.openstreetmap.josm.tools.WindowGeometry;
094    
095    abstract public class Main {
096    
097        /**
098         * Replies true if JOSM currently displays a map view. False, if it doesn't, i.e. if
099         * it only shows the MOTD panel.
100         *
101         * @return <code>true</code> if JOSM currently displays a map view
102         */
103        static public boolean isDisplayingMapView() {
104            if (map == null) return false;
105            if (map.mapView == null) return false;
106            return true;
107        }
108        /**
109         * Global parent component for all dialogs and message boxes
110         */
111        public static Component parent;
112        /**
113         * Global application.
114         */
115        public static Main main;
116        /**
117         * The worker thread slave. This is for executing all long and intensive
118         * calculations. The executed runnables are guaranteed to be executed separately
119         * and sequential.
120         */
121        public final static ExecutorService worker = new ProgressMonitorExecutor();
122        /**
123         * Global application preferences
124         */
125        public static Preferences pref;
126    
127        /**
128         * The global paste buffer.
129         */
130        public static final PrimitiveDeepCopy pasteBuffer = new PrimitiveDeepCopy();
131        public static Layer pasteSource;
132    
133        /**
134         * The MapFrame. Use setMapFrame to set or clear it.
135         */
136        public static MapFrame map;
137        /**
138         * Set to <code>true</code>, when in applet mode
139         */
140        public static boolean applet = false;
141    
142        /**
143         * The toolbar preference control to register new actions.
144         */
145        public static ToolbarPreferences toolbar;
146    
147        public UndoRedoHandler undoRedo = new UndoRedoHandler();
148    
149        public static PleaseWaitProgressMonitor currentProgressMonitor;
150    
151        /**
152         * The main menu bar at top of screen.
153         */
154        public MainMenu menu;
155    
156        /**
157         * The data validation handler.
158         */
159        public OsmValidator validator;
160        /**
161         * The MOTD Layer.
162         */
163        private GettingStarted gettingStarted = new GettingStarted();
164    
165        /**
166         * Logging level (3 = debug, 2 = info, 1 = warn, 0 = none).
167         */
168        static public int log_level = 2;
169        /**
170         * Print a warning message if logging is on.
171         * @param msg The message to print.
172         */
173        static public void warn(String msg) {
174            if (log_level < 1)
175                return;
176            System.out.println(msg);
177        }
178        /**
179         * Print an informational message if logging is on.
180         * @param msg The message to print.
181         */
182        static public void info(String msg) {
183            if (log_level < 2)
184                return;
185            System.out.println(msg);
186        }
187        /**
188         * Print an debug message if logging is on.
189         * @param msg The message to print.
190         */
191        static public void debug(String msg) {
192            if (log_level < 3)
193                return;
194            System.out.println(msg);
195        }
196        /**
197         * Print a formated warning message if logging is on. Calls {@link MessageFormat#format}
198         * function to format text.
199         * @param msg The formated message to print.
200         * @param objects The objects to insert into format string.
201         */
202        static public void warn(String msg, Object... objects) {
203            warn(MessageFormat.format(msg, objects));
204        }
205        /**
206         * Print a formated informational message if logging is on. Calls {@link MessageFormat#format}
207         * function to format text.
208         * @param msg The formated message to print.
209         * @param objects The objects to insert into format string.
210         */
211        static public void info(String msg, Object... objects) {
212            info(MessageFormat.format(msg, objects));
213        }
214        /**
215         * Print a formated debug message if logging is on. Calls {@link MessageFormat#format}
216         * function to format text.
217         * @param msg The formated message to print.
218         * @param objects The objects to insert into format string.
219         */
220        static public void debug(String msg, Object... objects) {
221            debug(MessageFormat.format(msg, objects));
222        }
223    
224        /**
225         * Platform specific code goes in here.
226         * Plugins may replace it, however, some hooks will be called before any plugins have been loeaded.
227         * So if you need to hook into those early ones, split your class and send the one with the early hooks
228         * to the JOSM team for inclusion.
229         */
230        public static PlatformHook platform;
231    
232        /**
233         * Whether or not the java vm is openjdk
234         * We use this to work around openjdk bugs
235         */
236        public static boolean isOpenjdk;
237    
238        /**
239         * Set or clear (if passed <code>null</code>) the map.
240         */
241        public final void setMapFrame(final MapFrame map) {
242            MapFrame old = Main.map;
243            panel.setVisible(false);
244            panel.removeAll();
245            if (map != null) {
246                map.fillPanel(panel);
247            } else {
248                old.destroy();
249                panel.add(gettingStarted, BorderLayout.CENTER);
250            }
251            panel.setVisible(true);
252            redoUndoListener.commandChanged(0,0);
253    
254            Main.map = map;
255    
256            PluginHandler.notifyMapFrameChanged(old, map);
257            if (map == null && currentProgressMonitor != null) {
258                currentProgressMonitor.showForegroundDialog();
259            }
260        }
261    
262        /**
263         * Remove the specified layer from the map. If it is the last layer,
264         * remove the map as well.
265         */
266        public final void removeLayer(final Layer layer) {
267            if (map != null) {
268                map.mapView.removeLayer(layer);
269                if (map != null && map.mapView.getAllLayers().isEmpty()) {
270                    setMapFrame(null);
271                }
272            }
273        }
274    
275        private static InitStatusListener initListener = null;
276    
277        public static interface InitStatusListener {
278    
279            void updateStatus(String event);
280        }
281    
282        public static void setInitStatusListener(InitStatusListener listener) {
283            initListener = listener;
284        }
285    
286        public Main() {
287            main = this;
288            isOpenjdk = System.getProperty("java.vm.name").toUpperCase().indexOf("OPENJDK") != -1;
289    
290            if (initListener != null) {
291                initListener.updateStatus(tr("Executing platform startup hook"));
292            }
293            platform.startupHook();
294    
295            if (initListener != null) {
296                initListener.updateStatus(tr("Building main menu"));
297            }
298            contentPanePrivate.add(panel, BorderLayout.CENTER);
299            panel.add(gettingStarted, BorderLayout.CENTER);
300            menu = new MainMenu();
301    
302            undoRedo.addCommandQueueListener(redoUndoListener);
303    
304            // creating toolbar
305            contentPanePrivate.add(toolbar.control, BorderLayout.NORTH);
306    
307            registerActionShortcut(menu.help, Shortcut.registerShortcut("system:help", tr("Help"),
308                    KeyEvent.VK_F1, Shortcut.DIRECT));
309    
310            // contains several initialization tasks to be executed (in parallel) by a ExecutorService
311            List<Callable<Void>> tasks = new ArrayList<Callable<Void>>();
312    
313            tasks.add(new Callable<Void>() {
314    
315                @Override
316                public Void call() throws Exception {
317                    // We try to establish an API connection early, so that any API
318                    // capabilities are already known to the editor instance. However
319                    // if it goes wrong that's not critical at this stage.
320                    if (initListener != null) {
321                        initListener.updateStatus(tr("Initializing OSM API"));
322                    }
323                    try {
324                        OsmApi.getOsmApi().initialize(null, true);
325                    } catch (Exception x) {
326                        // ignore any exception here.
327                    }
328                    return null;
329                }
330            });
331    
332            tasks.add(new Callable<Void>() {
333    
334                @Override
335                public Void call() throws Exception {
336                    if (initListener != null) {
337                        initListener.updateStatus(tr("Initializing presets"));
338                    }
339                    TaggingPresetPreference.initialize();
340                    // some validator tests require the presets to be initialized
341                    // TODO remove this dependency for parallel initialization
342                    if (initListener != null) {
343                        initListener.updateStatus(tr("Initializing validator"));
344                    }
345                    validator = new OsmValidator();
346                    MapView.addLayerChangeListener(validator);
347                    return null;
348                }
349            });
350    
351            tasks.add(new Callable<Void>() {
352    
353                @Override
354                public Void call() throws Exception {
355                    if (initListener != null) {
356                        initListener.updateStatus(tr("Initializing map styles"));
357                    }
358                    MapPaintPreference.initialize();
359                    return null;
360                }
361            });
362    
363            tasks.add(new Callable<Void>() {
364    
365                @Override
366                public Void call() throws Exception {
367                    if (initListener != null) {
368                        initListener.updateStatus(tr("Loading imagery preferences"));
369                    }
370                    ImageryPreference.initialize();
371                    return null;
372                }
373            });
374    
375            try {
376                for (Future<Void> i : Executors.newFixedThreadPool(
377                        Runtime.getRuntime().availableProcessors()).invokeAll(tasks)) {
378                    i.get();
379                }
380            } catch (Exception ex) {
381                throw new RuntimeException(ex);
382            }
383    
384            // hooks for the jmapviewer component
385            FeatureAdapter.registerBrowserAdapter(new FeatureAdapter.BrowserAdapter() {
386                @Override
387                public void openLink(String url) {
388                    OpenBrowser.displayUrl(url);
389                }
390            });
391            FeatureAdapter.registerTranslationAdapter(I18n.getTranslationAdapter());
392    
393            if (initListener != null) {
394                initListener.updateStatus(tr("Updating user interface"));
395            }
396    
397            toolbar.refreshToolbarControl();
398    
399            toolbar.control.updateUI();
400            contentPanePrivate.updateUI();
401    
402        }
403    
404        /**
405         * Add a new layer to the map. If no map exists, create one.
406         */
407        public final synchronized void addLayer(final Layer layer) {
408            if (map == null) {
409                final MapFrame mapFrame = new MapFrame(contentPanePrivate);
410                setMapFrame(mapFrame);
411                mapFrame.selectMapMode((MapMode)mapFrame.getDefaultButtonAction(), layer);
412                mapFrame.setVisible(true);
413                mapFrame.initializeDialogsPane();
414                // bootstrapping problem: make sure the layer list dialog is going to
415                // listen to change events of the very first layer
416                //
417                layer.addPropertyChangeListener(LayerListDialog.getInstance().getModel());
418            }
419            layer.hookUpMapView();
420            map.mapView.addLayer(layer);
421        }
422    
423        /**
424         * Replies <code>true</code> if there is an edit layer
425         *
426         * @return <code>true</code> if there is an edit layer
427         */
428        public boolean hasEditLayer() {
429            if (getEditLayer() == null) return false;
430            return true;
431        }
432    
433        /**
434         * Replies the current edit layer
435         *
436         * @return the current edit layer. <code>null</code>, if no current edit layer exists
437         */
438        public OsmDataLayer getEditLayer() {
439            if (map == null) return null;
440            if (map.mapView == null) return null;
441            return map.mapView.getEditLayer();
442        }
443    
444        /**
445         * Replies the current data set.
446         *
447         * @return the current data set. <code>null</code>, if no current data set exists
448         */
449        public DataSet getCurrentDataSet() {
450            if (!hasEditLayer()) return null;
451            return getEditLayer().data;
452        }
453    
454        /**
455         * Returns the currently active  layer
456         *
457         * @return the currently active layer. <code>null</code>, if currently no active layer exists
458         */
459        public Layer getActiveLayer() {
460            if (map == null) return null;
461            if (map.mapView == null) return null;
462            return map.mapView.getActiveLayer();
463        }
464    
465        protected static final JPanel contentPanePrivate = new JPanel(new BorderLayout());
466    
467        public static void redirectToMainContentPane(JComponent source) {
468            RedirectInputMap.redirect(source, contentPanePrivate);
469        }
470    
471        public static void registerActionShortcut(JosmAction action) {
472            registerActionShortcut(action, action.getShortcut());
473        }
474    
475        public static void registerActionShortcut(Action action, Shortcut shortcut) {
476            KeyStroke keyStroke = shortcut.getKeyStroke();
477            if (keyStroke == null)
478                return;
479    
480            InputMap inputMap = contentPanePrivate.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
481            Object existing = inputMap.get(keyStroke);
482            if (existing != null && !existing.equals(action)) {
483                System.out.println(String.format("Keystroke %s is already assigned to %s, will be overridden by %s", keyStroke, existing, action));
484            }
485            inputMap.put(keyStroke, action);
486    
487            contentPanePrivate.getActionMap().put(action, action);
488        }
489    
490        public static void unregisterShortcut(Shortcut shortcut) {
491            contentPanePrivate.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).remove(shortcut.getKeyStroke());
492        }
493    
494        public static void unregisterActionShortcut(JosmAction action) {
495            unregisterActionShortcut(action, action.getShortcut());
496        }
497    
498        public static void unregisterActionShortcut(Action action, Shortcut shortcut) {
499            unregisterShortcut(shortcut);
500            contentPanePrivate.getActionMap().remove(action);
501        }
502    
503        ///////////////////////////////////////////////////////////////////////////
504        //  Implementation part
505        ///////////////////////////////////////////////////////////////////////////
506    
507        public static final JPanel panel = new JPanel(new BorderLayout());
508    
509        protected static WindowGeometry geometry;
510        protected static int windowState = JFrame.NORMAL;
511    
512        private final CommandQueueListener redoUndoListener = new CommandQueueListener(){
513            public void commandChanged(final int queueSize, final int redoSize) {
514                menu.undo.setEnabled(queueSize > 0);
515                menu.redo.setEnabled(redoSize > 0);
516            }
517        };
518    
519        /**
520         * Should be called before the main constructor to setup some parameter stuff
521         * @param args The parsed argument list.
522         */
523        public static void preConstructorInit(Map<Option, Collection<String>> args) {
524            ProjectionPreference.setProjection();
525    
526            try {
527                String defaultlaf = platform.getDefaultStyle();
528                String laf = Main.pref.get("laf", defaultlaf);
529                try {
530                    UIManager.setLookAndFeel(laf);
531                }
532                catch (final java.lang.ClassNotFoundException e) {
533                    System.out.println("Look and Feel not found: " + laf);
534                    Main.pref.put("laf", defaultlaf);
535                }
536                catch (final javax.swing.UnsupportedLookAndFeelException e) {
537                    System.out.println("Look and Feel not supported: " + laf);
538                    Main.pref.put("laf", defaultlaf);
539                }
540                toolbar = new ToolbarPreferences();
541                contentPanePrivate.updateUI();
542                panel.updateUI();
543            } catch (final Exception e) {
544                e.printStackTrace();
545            }
546            UIManager.put("OptionPane.okIcon", ImageProvider.get("ok"));
547            UIManager.put("OptionPane.yesIcon", UIManager.get("OptionPane.okIcon"));
548            UIManager.put("OptionPane.cancelIcon", ImageProvider.get("cancel"));
549            UIManager.put("OptionPane.noIcon", UIManager.get("OptionPane.cancelIcon"));
550    
551            I18n.translateJavaInternalMessages();
552    
553            // init default coordinate format
554            //
555            try {
556                //CoordinateFormat format = CoordinateFormat.valueOf(Main.pref.get("coordinates"));
557                CoordinateFormat.setCoordinateFormat(CoordinateFormat.valueOf(Main.pref.get("coordinates")));
558            } catch (IllegalArgumentException iae) {
559                CoordinateFormat.setCoordinateFormat(CoordinateFormat.DECIMAL_DEGREES);
560            }
561    
562            geometry = WindowGeometry.mainWindow("gui.geometry",
563                (args.containsKey(Option.GEOMETRY) ? args.get(Option.GEOMETRY).iterator().next() : null),
564                !args.containsKey(Option.NO_MAXIMIZE) && Main.pref.getBoolean("gui.maximized", false));
565        }
566    
567        public void postConstructorProcessCmdLine(Map<Option, Collection<String>> args) {
568            if (args.containsKey(Option.DOWNLOAD)) {
569                List<File> fileList = new ArrayList<File>();
570                for (String s : args.get(Option.DOWNLOAD)) {
571                    File f = null;
572                    switch(paramType(s)) {
573                    case httpUrl:
574                        downloadFromParamHttp(false, s);
575                        break;
576                    case bounds:
577                        downloadFromParamBounds(false, s);
578                        break;
579                    case fileUrl:
580                        try {
581                            f = new File(new URI(s));
582                        } catch (URISyntaxException e) {
583                            JOptionPane.showMessageDialog(
584                                    Main.parent,
585                                    tr("Ignoring malformed file URL: \"{0}\"", s),
586                                    tr("Warning"),
587                                    JOptionPane.WARNING_MESSAGE
588                                    );
589                        }
590                        if (f!=null) {
591                            fileList.add(f);
592                        }
593                        break;
594                    case fileName:
595                        f = new File(s);
596                        fileList.add(f);
597                        break;
598                    }
599                }
600                if(!fileList.isEmpty())
601                {
602                    OpenFileAction.openFiles(fileList, true);
603                }
604            }
605            if (args.containsKey(Option.DOWNLOADGPS)) {
606                for (String s : args.get(Option.DOWNLOADGPS)) {
607                    switch(paramType(s)) {
608                    case httpUrl:
609                        downloadFromParamHttp(true, s);
610                        break;
611                    case bounds:
612                        downloadFromParamBounds(true, s);
613                        break;
614                    case fileUrl:
615                    case fileName:
616                        JOptionPane.showMessageDialog(
617                                Main.parent,
618                                tr("Parameter \"downloadgps\" does not accept file names or file URLs"),
619                                tr("Warning"),
620                                JOptionPane.WARNING_MESSAGE
621                                );
622                    }
623                }
624            }
625            if (args.containsKey(Option.SELECTION)) {
626                for (String s : args.get(Option.SELECTION)) {
627                    SearchAction.search(s, SearchAction.SearchMode.add);
628                }
629            }
630        }
631    
632        /**
633         * Asks user to perform "save layer" operations (save .osm on disk and/or upload osm data to server) for all {@link OsmDataLayer} before JOSM exits.
634         * @return {@code true} if there was nothing to save, or if the user wants to proceed to save operations. {@code false} if the user cancels.
635         * @since 2025
636         */
637        public static boolean saveUnsavedModifications() {
638            if (map == null || map.mapView == null) return true;
639            return saveUnsavedModifications(map.mapView.getLayersOfType(OsmDataLayer.class), true);
640        }
641    
642        /**
643         * Asks user to perform "save layer" operations (save .osm on disk and/or upload osm data to server) before osm layers deletion.
644         * 
645         * @param selectedLayers The layers to check. Only instances of {@link OsmDataLayer} are considered.
646         * @param exit {@code true} if JOSM is exiting, {@code false} otherwise.
647         * @return {@code true} if there was nothing to save, or if the user wants to proceed to save operations. {@code false} if the user cancels.
648         * @since 5519
649         */
650        public static boolean saveUnsavedModifications(List<? extends Layer> selectedLayers, boolean exit) {
651            SaveLayersDialog dialog = new SaveLayersDialog(parent);
652            List<OsmDataLayer> layersWithUnmodifiedChanges = new ArrayList<OsmDataLayer>();
653            for (Layer l: selectedLayers) {
654                if (!(l instanceof OsmDataLayer)) {
655                    continue;
656                }
657                OsmDataLayer odl = (OsmDataLayer)l;
658                if ((odl.requiresSaveToFile() || (odl.requiresUploadToServer() && !odl.isUploadDiscouraged())) && odl.data.isModified()) {
659                    layersWithUnmodifiedChanges.add(odl);
660                }
661            }
662            if (exit) {
663                dialog.prepareForSavingAndUpdatingLayersBeforeExit();
664            } else {
665                dialog.prepareForSavingAndUpdatingLayersBeforeDelete();
666            }
667            if (!layersWithUnmodifiedChanges.isEmpty()) {
668                dialog.getModel().populate(layersWithUnmodifiedChanges);
669                dialog.setVisible(true);
670                switch(dialog.getUserAction()) {
671                case CANCEL: return false;
672                case PROCEED: return true;
673                default: return false;
674                }
675            }
676    
677            return true;
678        }
679    
680        public static boolean exitJosm(boolean exit) {
681            if (Main.saveUnsavedModifications()) {
682                geometry.remember("gui.geometry");
683                if (map  != null) {
684                    map.rememberToggleDialogWidth();
685                }
686                pref.put("gui.maximized", (windowState & JFrame.MAXIMIZED_BOTH) != 0);
687                // Remove all layers because somebody may rely on layerRemoved events (like AutosaveTask)
688                if (Main.isDisplayingMapView()) {
689                    Collection<Layer> layers = new ArrayList<Layer>(Main.map.mapView.getAllLayers());
690                    for (Layer l: layers) {
691                        Main.map.mapView.removeLayer(l);
692                    }
693                }
694                if (exit) {
695                    System.exit(0);
696                    return true;
697                } else
698                    return true;
699            } else
700                return false;
701        }
702    
703        /**
704         * The type of a command line parameter, to be used in switch statements.
705         * @see #paramType
706         */
707        private enum DownloadParamType { httpUrl, fileUrl, bounds, fileName }
708    
709        /**
710         * Guess the type of a parameter string specified on the command line with --download= or --downloadgps.
711         * @param s A parameter string
712         * @return The guessed parameter type
713         */
714        private DownloadParamType paramType(String s) {
715            if(s.startsWith("http:")) return DownloadParamType.httpUrl;
716            if(s.startsWith("file:")) return DownloadParamType.fileUrl;
717            String coorPattern = "\\s*[+-]?[0-9]+(\\.[0-9]+)?\\s*";
718            if(s.matches(coorPattern+"(,"+coorPattern+"){3}")) return DownloadParamType.bounds;
719            // everything else must be a file name
720            return DownloadParamType.fileName;
721        }
722    
723        /**
724         * Download area specified on the command line as OSM URL.
725         * @param rawGps Flag to download raw GPS tracks
726         * @param s The URL parameter
727         */
728        private static void downloadFromParamHttp(final boolean rawGps, String s) {
729            final Bounds b = OsmUrlToBounds.parse(s);
730            if (b == null) {
731                JOptionPane.showMessageDialog(
732                        Main.parent,
733                        tr("Ignoring malformed URL: \"{0}\"", s),
734                        tr("Warning"),
735                        JOptionPane.WARNING_MESSAGE
736                        );
737            } else {
738                downloadFromParamBounds(rawGps, b);
739            }
740        }
741    
742        /**
743         * Download area specified on the command line as bounds string.
744         * @param rawGps Flag to download raw GPS tracks
745         * @param s The bounds parameter
746         */
747        private static void downloadFromParamBounds(final boolean rawGps, String s) {
748            final StringTokenizer st = new StringTokenizer(s, ",");
749            if (st.countTokens() == 4) {
750                Bounds b = new Bounds(
751                        new LatLon(Double.parseDouble(st.nextToken()),Double.parseDouble(st.nextToken())),
752                        new LatLon(Double.parseDouble(st.nextToken()),Double.parseDouble(st.nextToken()))
753                        );
754                downloadFromParamBounds(rawGps, b);
755            }
756        }
757    
758        /**
759         * Download area specified as Bounds value.
760         * @param rawGps Flag to download raw GPS tracks
761         * @param b The bounds value
762         * @see #downloadFromParamBounds(boolean, String)
763         * @see #downloadFromParamHttp
764         */
765        private static void downloadFromParamBounds(final boolean rawGps, Bounds b) {
766            DownloadTask task = rawGps ? new DownloadGpsTask() : new DownloadOsmTask();
767            // asynchronously launch the download task ...
768            Future<?> future = task.download(true, b, null);
769            // ... and the continuation when the download is finished (this will wait for the download to finish)
770            Main.worker.execute(new PostDownloadHandler(task, future));
771        }
772    
773        public static void determinePlatformHook() {
774            String os = System.getProperty("os.name");
775            if (os == null) {
776                System.err.println("Your operating system has no name, so I'm guessing its some kind of *nix.");
777                platform = new PlatformHookUnixoid();
778            } else if (os.toLowerCase().startsWith("windows")) {
779                platform = new PlatformHookWindows();
780            } else if (os.equals("Linux") || os.equals("Solaris") ||
781                    os.equals("SunOS") || os.equals("AIX") ||
782                    os.equals("FreeBSD") || os.equals("NetBSD") || os.equals("OpenBSD")) {
783                platform = new PlatformHookUnixoid();
784            } else if (os.toLowerCase().startsWith("mac os x")) {
785                platform = new PlatformHookOsx();
786            } else {
787                System.err.println("I don't know your operating system '"+os+"', so I'm guessing its some kind of *nix.");
788                platform = new PlatformHookUnixoid();
789            }
790        }
791    
792        private static class WindowPositionSizeListener extends WindowAdapter implements
793        ComponentListener {
794            @Override
795            public void windowStateChanged(WindowEvent e) {
796                Main.windowState = e.getNewState();
797            }
798    
799            @Override
800            public void componentHidden(ComponentEvent e) {
801            }
802    
803            @Override
804            public void componentMoved(ComponentEvent e) {
805                handleComponentEvent(e);
806            }
807    
808            @Override
809            public void componentResized(ComponentEvent e) {
810                handleComponentEvent(e);
811            }
812    
813            @Override
814            public void componentShown(ComponentEvent e) {
815            }
816    
817            private void handleComponentEvent(ComponentEvent e) {
818                Component c = e.getComponent();
819                if (c instanceof JFrame && c.isVisible()) {
820                    if(Main.windowState == JFrame.NORMAL) {
821                        Main.geometry = new WindowGeometry((JFrame) c);
822                    } else {
823                        Main.geometry.fixScreen((JFrame) c);
824                    }
825                }
826            }
827        }
828        public static void addListener() {
829            parent.addComponentListener(new WindowPositionSizeListener());
830            ((JFrame)parent).addWindowStateListener(new WindowPositionSizeListener());
831        }
832    
833        public static void checkJava6() {
834            String version = System.getProperty("java.version");
835            if (version != null) {
836                if (version.startsWith("1.6") || version.startsWith("6") ||
837                        version.startsWith("1.7") || version.startsWith("7"))
838                    return;
839                if (version.startsWith("1.5") || version.startsWith("5")) {
840                    JLabel ho = new JLabel("<html>"+
841                            tr("<h2>JOSM requires Java version 6.</h2>"+
842                                    "Detected Java version: {0}.<br>"+
843                                    "You can <ul><li>update your Java (JRE) or</li>"+
844                                    "<li>use an earlier (Java 5 compatible) version of JOSM.</li></ul>"+
845                                    "More Info:", version)+"</html>");
846                    JTextArea link = new JTextArea("http://josm.openstreetmap.de/wiki/Help/SystemRequirements");
847                    link.setEditable(false);
848                    link.setBackground(panel.getBackground());
849                    JPanel panel = new JPanel(new GridBagLayout());
850                    GridBagConstraints gbc = new GridBagConstraints();
851                    gbc.gridwidth = GridBagConstraints.REMAINDER;
852                    gbc.anchor = GridBagConstraints.WEST;
853                    gbc.weightx = 1.0;
854                    panel.add(ho, gbc);
855                    panel.add(link, gbc);
856                    final String EXIT = tr("Exit JOSM");
857                    final String CONTINUE = tr("Continue, try anyway");
858                    int ret = JOptionPane.showOptionDialog(null, panel, tr("Error"), JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, new String[] {EXIT, CONTINUE}, EXIT);
859                    if (ret == 0) {
860                        System.exit(0);
861                    }
862                    return;
863                }
864            }
865            System.err.println("Error: Could not recognize Java Version: "+version);
866        }
867    
868        /* ----------------------------------------------------------------------------------------- */
869        /* projection handling  - Main is a registry for a single, global projection instance        */
870        /*                                                                                           */
871        /* TODO: For historical reasons the registry is implemented by Main. An alternative approach */
872        /* would be a singleton org.openstreetmap.josm.data.projection.ProjectionRegistry class.     */
873        /* ----------------------------------------------------------------------------------------- */
874        /**
875         * The projection method used.
876         * use {@link #getProjection()} and {@link #setProjection(Projection)} for access.
877         * Use {@link #setProjection(Projection)} in order to trigger a projection change event.
878         */
879        private static Projection proj;
880    
881        /**
882         * Replies the current projection.
883         *
884         * @return the currently active projection
885         */
886        public static Projection getProjection() {
887            return proj;
888        }
889    
890        /**
891         * Sets the current projection
892         *
893         * @param p the projection
894         */
895        public static void setProjection(Projection p) {
896            CheckParameterUtil.ensureParameterNotNull(p);
897            Projection oldValue = proj;
898            Bounds b = isDisplayingMapView() ? map.mapView.getRealBounds() : null;
899            proj = p;
900            fireProjectionChanged(oldValue, proj, b);
901        }
902    
903        /*
904         * Keep WeakReferences to the listeners. This relieves clients from the burden of
905         * explicitly removing the listeners and allows us to transparently register every
906         * created dataset as projection change listener.
907         */
908        private static final ArrayList<WeakReference<ProjectionChangeListener>> listeners = new ArrayList<WeakReference<ProjectionChangeListener>>();
909    
910        private static void fireProjectionChanged(Projection oldValue, Projection newValue, Bounds oldBounds) {
911            if (newValue == null ^ oldValue == null
912                    || (newValue != null && oldValue != null && !Utils.equal(newValue.toCode(), oldValue.toCode()))) {
913    
914                synchronized(Main.class) {
915                    Iterator<WeakReference<ProjectionChangeListener>> it = listeners.iterator();
916                    while (it.hasNext()){
917                        WeakReference<ProjectionChangeListener> wr = it.next();
918                        ProjectionChangeListener listener = wr.get();
919                        if (listener == null) {
920                            it.remove();
921                            continue;
922                        }
923                        listener.projectionChanged(oldValue, newValue);
924                    }
925                }
926                if (newValue != null && oldBounds != null) {
927                    Main.map.mapView.zoomTo(oldBounds);
928                }
929                /* TODO - remove layers with fixed projection */
930            }
931        }
932    
933        /**
934         * Register a projection change listener.
935         *
936         * @param listener the listener. Ignored if <code>null</code>.
937         */
938        public static void addProjectionChangeListener(ProjectionChangeListener listener) {
939            if (listener == null) return;
940            synchronized (Main.class) {
941                for (WeakReference<ProjectionChangeListener> wr : listeners) {
942                    // already registered ? => abort
943                    if (wr.get() == listener) return;
944                }
945                listeners.add(new WeakReference<ProjectionChangeListener>(listener));
946            }
947        }
948    
949        /**
950         * Removes a projection change listener.
951         *
952         * @param listener the listener. Ignored if <code>null</code>.
953         */
954        public static void removeProjectionChangeListener(ProjectionChangeListener listener) {
955            if (listener == null) return;
956            synchronized(Main.class){
957                Iterator<WeakReference<ProjectionChangeListener>> it = listeners.iterator();
958                while (it.hasNext()){
959                    WeakReference<ProjectionChangeListener> wr = it.next();
960                    // remove the listener - and any other listener which got garbage
961                    // collected in the meantime
962                    if (wr.get() == null || wr.get() == listener) {
963                        it.remove();
964                    }
965                }
966            }
967        }
968    
969        /**
970         * Listener for window switch events.
971         * 
972         * These are events, when the user activates a window of another application
973         * or comes back to JOSM. Window switches from one JOSM window to another
974         * are not reported.
975         */
976        public static interface WindowSwitchListener {
977            /**
978             * Called when the user activates a window of another application.
979             */
980            void toOtherApplication();
981            /**
982             * Called when the user comes from a window of another application
983             * back to JOSM.
984             */
985            void fromOtherApplication();
986        }
987    
988        private static final ArrayList<WeakReference<WindowSwitchListener>> windowSwitchListeners = new ArrayList<WeakReference<WindowSwitchListener>>();
989    
990        /**
991         * Register a window switch listener.
992         *
993         * @param listener the listener. Ignored if <code>null</code>.
994         */
995        public static void addWindowSwitchListener(WindowSwitchListener listener) {
996            if (listener == null) return;
997            synchronized (Main.class) {
998                for (WeakReference<WindowSwitchListener> wr : windowSwitchListeners) {
999                    // already registered ? => abort
1000                    if (wr.get() == listener) return;
1001                }
1002                boolean wasEmpty = windowSwitchListeners.isEmpty();
1003                windowSwitchListeners.add(new WeakReference<WindowSwitchListener>(listener));
1004                if (wasEmpty) {
1005                    // The following call will have no effect, when there is no window
1006                    // at the time. Therefore, MasterWindowListener.setup() will also be
1007                    // called, as soon as the main window is shown.
1008                    MasterWindowListener.setup();
1009                }
1010            }
1011        }
1012    
1013        /**
1014         * Removes a window switch listener.
1015         *
1016         * @param listener the listener. Ignored if <code>null</code>.
1017         */
1018        public static void removeWindowSwitchListener(WindowSwitchListener listener) {
1019            if (listener == null) return;
1020            synchronized (Main.class){
1021                Iterator<WeakReference<WindowSwitchListener>> it = windowSwitchListeners.iterator();
1022                while (it.hasNext()){
1023                    WeakReference<WindowSwitchListener> wr = it.next();
1024                    // remove the listener - and any other listener which got garbage
1025                    // collected in the meantime
1026                    if (wr.get() == null || wr.get() == listener) {
1027                        it.remove();
1028                    }
1029                }
1030                if (windowSwitchListeners.isEmpty()) {
1031                    MasterWindowListener.teardown();
1032                }
1033            }
1034        }
1035    
1036        /**
1037         * WindowListener, that is registered on all Windows of the application.
1038         *
1039         * Its purpose is to notify WindowSwitchListeners, that the user switches to
1040         * another application, e.g. a browser, or back to JOSM.
1041         *
1042         * When changing from JOSM to another application and back (e.g. two times
1043         * alt+tab), the active Window within JOSM may be different.
1044         * Therefore, we need to register listeners to <strong>all</strong> (visible)
1045         * Windows in JOSM, and it does not suffice to monitor the one that was
1046         * deactivated last.
1047         *
1048         * This class is only "active" on demand, i.e. when there is at least one
1049         * WindowSwitchListener registered.
1050         */
1051        protected static class MasterWindowListener extends WindowAdapter {
1052    
1053            private static MasterWindowListener INSTANCE;
1054    
1055            public static MasterWindowListener getInstance() {
1056                if (INSTANCE == null) {
1057                    INSTANCE = new MasterWindowListener();
1058                }
1059                return INSTANCE;
1060            }
1061    
1062            /**
1063             * Register listeners to all non-hidden windows.
1064             *
1065             * Windows that are created later, will be cared for in {@link #windowDeactivated(WindowEvent)}.
1066             */
1067            public static void setup() {
1068                if (!windowSwitchListeners.isEmpty()) {
1069                    for (Window w : Window.getWindows()) {
1070                        if (w.isShowing()) {
1071                            if (!Arrays.asList(w.getWindowListeners()).contains(getInstance())) {
1072                                w.addWindowListener(getInstance());
1073                            }
1074                        }
1075                    }
1076                }
1077            }
1078    
1079            /**
1080             * Unregister all listeners.
1081             */
1082            public static void teardown() {
1083                for (Window w : Window.getWindows()) {
1084                    w.removeWindowListener(getInstance());
1085                }
1086            }
1087    
1088            @Override
1089            public void windowActivated(WindowEvent e) {
1090                if (e.getOppositeWindow() == null) { // we come from a window of a different application
1091                    // fire WindowSwitchListeners
1092                    synchronized (Main.class) {
1093                        Iterator<WeakReference<WindowSwitchListener>> it = windowSwitchListeners.iterator();
1094                        while (it.hasNext()){
1095                            WeakReference<WindowSwitchListener> wr = it.next();
1096                            WindowSwitchListener listener = wr.get();
1097                            if (listener == null) {
1098                                it.remove();
1099                                continue;
1100                            }
1101                            listener.fromOtherApplication();
1102                        }
1103                    }
1104                }
1105            }
1106    
1107            @Override
1108            public void windowDeactivated(WindowEvent e) {
1109                // set up windows that have been created in the meantime
1110                for (Window w : Window.getWindows()) {
1111                    if (!w.isShowing()) {
1112                        w.removeWindowListener(getInstance());
1113                    } else {
1114                        if (!Arrays.asList(w.getWindowListeners()).contains(getInstance())) {
1115                            w.addWindowListener(getInstance());
1116                        }
1117                    }
1118                }
1119                if (e.getOppositeWindow() == null) { // we go to a window of a different application
1120                    // fire WindowSwitchListeners
1121                    synchronized (Main.class) {
1122                        Iterator<WeakReference<WindowSwitchListener>> it = windowSwitchListeners.iterator();
1123                        while (it.hasNext()){
1124                            WeakReference<WindowSwitchListener> wr = it.next();
1125                            WindowSwitchListener listener = wr.get();
1126                            if (listener == null) {
1127                                it.remove();
1128                                continue;
1129                            }
1130                            listener.toOtherApplication();
1131                        }
1132                    }
1133                }
1134            }
1135        }
1136    
1137    }