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Main.java

// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm;
import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.KeyEvent;
import java.io.File;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.StringTokenizer;
import java.util.TreeMap;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JComponent;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.KeyStroke;
import javax.swing.UIManager;

import org.openstreetmap.josm.actions.downloadtasks.DownloadGpsTask;
import org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask;
import org.openstreetmap.josm.actions.mapmode.MapMode;
import org.openstreetmap.josm.actions.search.SearchAction;
import org.openstreetmap.josm.data.Bounds;
import org.openstreetmap.josm.data.Preferences;
import org.openstreetmap.josm.data.UndoRedoHandler;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.data.projection.Epsg4326;
import org.openstreetmap.josm.data.projection.Projection;
import org.openstreetmap.josm.gui.GettingStarted;
import org.openstreetmap.josm.gui.MainMenu;
import org.openstreetmap.josm.gui.MapFrame;
import org.openstreetmap.josm.gui.PleaseWaitDialog;
import org.openstreetmap.josm.gui.download.BoundingBoxSelection;
import org.openstreetmap.josm.gui.download.DownloadDialog.DownloadTask;
import org.openstreetmap.josm.gui.layer.Layer;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.gui.layer.OsmDataLayer.CommandQueueListener;
import org.openstreetmap.josm.gui.preferences.MapPaintPreference;
import org.openstreetmap.josm.gui.preferences.TaggingPresetPreference;
import org.openstreetmap.josm.gui.preferences.ToolbarPreferences;
import org.openstreetmap.josm.plugins.PluginInformation;
import org.openstreetmap.josm.plugins.PluginProxy;
import org.openstreetmap.josm.tools.ImageProvider;

abstract public class Main {
      /**
       * Global parent component for all dialogs and message boxes
       */
      public static Component parent;
      /**
       * Global application.
       */
      public static Main main;
      /**
       * The worker thread slave. This is for executing all long and intensive
       * calculations. The executed runnables are guaranteed to be executed seperatly
       * and sequenciel.
       */
      public final static Executor worker = Executors.newSingleThreadExecutor();
      /**
       * Global application preferences
       */
      public static Preferences pref = new Preferences();
      /**
       * The global dataset.
       */
      public static DataSet ds = new DataSet();
      /**
       * The global paste buffer.
       */
      public static DataSet pasteBuffer = new DataSet();
      /**
       * The projection method used.
       */
      public static Projection proj;
      /**
       * The MapFrame. Use setMapFrame to set or clear it.
       */
      public static MapFrame map;
      /**
       * All installed and loaded plugins (resp. their main classes)
       */
      public final static Collection<PluginProxy> plugins = new LinkedList<PluginProxy>();
      /**
       * The dialog that gets displayed during background task execution.
       */
      public static PleaseWaitDialog pleaseWaitDlg;

      /**
       * True, when in applet mode
       */
      public static boolean applet = false;

      /**
       * The toolbar preference control to register new actions.
       */
      public static ToolbarPreferences toolbar = new ToolbarPreferences();


      public UndoRedoHandler undoRedo = new UndoRedoHandler();

      /**
       * The main menu bar at top of screen.
       */
      public final MainMenu menu;

      /**
       * Print a debug message if debugging is on.
       */
      static public int debug_level = 1;
      static public final void debug(String msg) {
            if (debug_level <= 0)
                  return;
            System.out.println(msg);
      }

      /**
       * Set or clear (if passed <code>null</code>) the map.
       */
      public final void setMapFrame(final MapFrame map) {
            MapFrame old = Main.map;
            Main.map = map;
            panel.setVisible(false);
            panel.removeAll();
            if (map != null)
                  map.fillPanel(panel);
            else {
                  old.destroy();
                  panel.add(new GettingStarted(), BorderLayout.CENTER);
            }
            panel.setVisible(true);
            redoUndoListener.commandChanged(0,0);

            for (PluginProxy plugin : plugins)
                  plugin.mapFrameInitialized(old, map);
      }

      /**
       * Set the layer menu (changed when active layer changes).
       */
      public final void setLayerMenu(Component[] entries) {
            //if (entries == null || entries.length == 0)
                  //menu.layerMenu.setVisible(false);
            //else {
                  //menu.layerMenu.removeAll();
                  //for (Component c : entries)
                        //menu.layerMenu.add(c);
                  //menu.layerMenu.setVisible(true);
            //}
      }

      /**
       * Remove the specified layer from the map. If it is the last layer, remove the map as well.
       */
      public final void removeLayer(final Layer layer) {
            map.mapView.removeLayer(layer);
            if (layer instanceof OsmDataLayer)
                  ds = new DataSet();
            if (map.mapView.getAllLayers().isEmpty())
                  setMapFrame(null);
      }


      public Main() {
            main = this;
            contentPane.add(panel, BorderLayout.CENTER);
            panel.add(new GettingStarted(), BorderLayout.CENTER);
            menu = new MainMenu();

            undoRedo.listenerCommands.add(redoUndoListener);
            
            // creating toolbar
            contentPane.add(toolbar.control, BorderLayout.NORTH);

            contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_F1, 0), "Help");
            contentPane.getActionMap().put("Help", menu.help);

            TaggingPresetPreference.initialize();
            MapPaintPreference.initialize();

            toolbar.refreshToolbarControl();

            toolbar.control.updateUI();
            contentPane.updateUI();
      }

      /**
       * Load all plugins specified in preferences. If the parameter is <code>true</code>, all
       * early plugins are loaded (before constructor).
       */
      public static void loadPlugins(boolean early) {
            List<String> plugins = new LinkedList<String>();
            if (Main.pref.hasKey("plugins"))
                  plugins.addAll(Arrays.asList(Main.pref.get("plugins").split(",")));
            if (System.getProperty("josm.plugins") != null)
                  plugins.addAll(Arrays.asList(System.getProperty("josm.plugins").split(",")));
            
            // we remove mappaint from the preferences on startup but this is just
            // in case it crept in through the properties:
            if (plugins.contains("mappaint")) {
                  plugins.remove("mappaint");
                  System.out.println("Warning - loading of mappaint plugin was requested. This JOSM version has built-in mappaint support. The plugin is not required.");
            }
            
            if (plugins.isEmpty())
                  return;
            SortedMap<Integer, Collection<PluginInformation>> p = new TreeMap<Integer, Collection<PluginInformation>>();
            for (String pluginName : plugins) {
                  PluginInformation info = PluginInformation.findPlugin(pluginName);
                  if (info != null) {
                        if (info.early != early)
                              continue;
                        if (!p.containsKey(info.stage))
                              p.put(info.stage, new LinkedList<PluginInformation>());
                        p.get(info.stage).add(info);
                  } else {
                        if (early)
                              System.out.println("Plugin not found: "+pluginName); // do not translate
                        else  
                              JOptionPane.showMessageDialog(Main.parent, tr("Plugin not found: {0}.", pluginName));
                  }
            }
            
            // iterate all plugins and collect all libraries of all plugins:
            List<URL> allPluginLibraries = new ArrayList<URL>();
            for (Collection<PluginInformation> c : p.values())
                  for (PluginInformation info : c)
                        allPluginLibraries.addAll(info.libraries);
            // create a classloader for all plugins:
            URL[] jarUrls = new URL[allPluginLibraries.size()];
            jarUrls = allPluginLibraries.toArray(jarUrls);
            URLClassLoader pluginClassLoader = new URLClassLoader(jarUrls, Main.class.getClassLoader());
            ImageProvider.sources.add(0, pluginClassLoader);

            for (Collection<PluginInformation> c : p.values()) {
                  for (PluginInformation info : c) {
                        try {
                              Class<?> klass = info.loadClass(pluginClassLoader);
                              if (klass != null) {
                                    System.out.println("loading "+info.name);
                                    Main.plugins.add(info.load(klass));
                              }
                        } catch (Throwable e) {
                              e.printStackTrace();
                              boolean remove = true;
                              if (early)
                                    System.out.println("Could not load plugin: "+info.name+" - deleted from preferences"); // do not translate
                              else {
                                    int answer = JOptionPane.showConfirmDialog(Main.parent,
                                          tr("Could not load plugin {0}. Delete from preferences?", info.name,
                                          JOptionPane.YES_NO_OPTION));
                                    if (answer != JOptionPane.OK_OPTION) {
                                          remove = false;
                                    }
                              }
                              if (remove) {
                                    plugins.remove(info.name);
                                    String plist = null;
                                    for (String pn : plugins) { 
                                          if (plist==null) plist=""; else plist=plist+",";
                                          plist=plist+pn;
                                    }
                                    Main.pref.put("plugins", plist);
                              }
                        }
                  }
            }
      }

      /**
       * Add a new layer to the map. If no map exist, create one.
       */
      public final void addLayer(final Layer layer) {
            if (map == null) {
                  final MapFrame mapFrame = new MapFrame();
                  setMapFrame(mapFrame);
                  mapFrame.selectMapMode((MapMode)mapFrame.getDefaultButtonAction());
                  mapFrame.setVisible(true);
                  mapFrame.setVisibleDialogs();
            }
            map.mapView.addLayer(layer);
      }
      /**
       * @return The edit osm layer. If none exist, it will be created.
       */
      public final OsmDataLayer editLayer() {
            if (map == null || map.mapView.editLayer == null)
                  menu.newAction.actionPerformed(null);
            return map.mapView.editLayer;
      }




      /**
       * Use this to register shortcuts to
       */
      public static final JPanel contentPane = new JPanel(new BorderLayout());


      ////////////////////////////////////////////////////////////////////////////////////////
      //  Implementation part
      ////////////////////////////////////////////////////////////////////////////////////////

      public static JPanel panel = new JPanel(new BorderLayout());

      protected static Rectangle bounds;

      private final CommandQueueListener redoUndoListener = new CommandQueueListener(){
            public void commandChanged(final int queueSize, final int redoSize) {
                  menu.undo.setEnabled(queueSize > 0);
                  menu.redo.setEnabled(redoSize > 0);
            }
      };
      /**
       * Should be called before the main constructor to setup some parameter stuff
       * @param args The parsed argument list.
       */
      public static void preConstructorInit(Map<String, Collection<String>> args) {
            try {
                  Main.proj = (Projection)Class.forName(Main.pref.get("projection")).newInstance();
            } catch (final Exception e) {
                  e.printStackTrace();
                  JOptionPane.showMessageDialog(null, tr("The projection could not be read from preferences. Using EPSG:4263."));
                  Main.proj = new Epsg4326();
            }

            try {
                  UIManager.setLookAndFeel(Main.pref.get("laf"));
                  contentPane.updateUI();
                  panel.updateUI();
            } catch (final Exception e) {
                  e.printStackTrace();
            }
            UIManager.put("OptionPane.okIcon", ImageProvider.get("ok"));
            UIManager.put("OptionPane.yesIcon", UIManager.get("OptionPane.okIcon"));
            UIManager.put("OptionPane.cancelIcon", ImageProvider.get("cancel"));
            UIManager.put("OptionPane.noIcon", UIManager.get("OptionPane.cancelIcon"));

            Dimension screenDimension = Toolkit.getDefaultToolkit().getScreenSize();
            if (args.containsKey("geometry")) {
                  String geometry = args.get("geometry").iterator().next();
                  final Matcher m = Pattern.compile("(\\d+)x(\\d+)(([+-])(\\d+)([+-])(\\d+))?").matcher(geometry);
                  if (m.matches()) {
                        int w = Integer.valueOf(m.group(1));
                        int h = Integer.valueOf(m.group(2));
                        int x = 0, y = 0;
                        if (m.group(3) != null) {
                              x = Integer.valueOf(m.group(5));
                              y = Integer.valueOf(m.group(7));
                              if (m.group(4).equals("-"))
                                    x = screenDimension.width - x - w;
                              if (m.group(6).equals("-"))
                                    y = screenDimension.height - y - h;
                        }
                        bounds = new Rectangle(x,y,w,h);
                  } else
                        System.out.println("Ignoring malformed geometry: "+geometry);
            }
            if (bounds == null)
                  bounds = !args.containsKey("no-fullscreen") ? new Rectangle(0,0,screenDimension.width,screenDimension.height) : new Rectangle(1000,740);

                  // preinitialize a wait dialog for all early downloads (e.g. via command line)
                  pleaseWaitDlg = new PleaseWaitDialog(null);
      }

      public void postConstructorProcessCmdLine(Map<String, Collection<String>> args) {
            // initialize the pleaseWaitDialog with the application as parent to handle focus stuff
            pleaseWaitDlg = new PleaseWaitDialog(parent);

            if (args.containsKey("download"))
                  for (String s : args.get("download"))
                        downloadFromParamString(false, s);
            if (args.containsKey("downloadgps"))
                  for (String s : args.get("downloadgps"))
                        downloadFromParamString(true, s);
            if (args.containsKey("selection"))
                  for (String s : args.get("selection"))
                        SearchAction.search(s, SearchAction.SearchMode.add, false);
      }

      public static boolean breakBecauseUnsavedChanges() {
            if (map != null) {
                  boolean modified = false;
                  boolean uploadedModified = false;
                  for (final Layer l : map.mapView.getAllLayers()) {
                        if (l instanceof OsmDataLayer && ((OsmDataLayer)l).isModified()) {
                              modified = true;
                              uploadedModified = ((OsmDataLayer)l).uploadedModified;
                              break;
                        }
                  }
                  if (modified) {
                        final String msg = uploadedModified ? "\n"+tr("Hint: Some changes came from uploading new data to the server.") : "";
                        final int answer = JOptionPane.showConfirmDialog(
                                    parent, tr("There are unsaved changes. Discard the changes and continue?")+msg,
                                    tr("Unsaved Changes"), JOptionPane.YES_NO_OPTION);
                        if (answer != JOptionPane.YES_OPTION)
                              return true;
                  }
            }
            return false;
      }

      private static void downloadFromParamString(final boolean rawGps, String s) {
            if (s.startsWith("http:")) {
                  final Bounds b = BoundingBoxSelection.osmurl2bounds(s);
                  if (b == null)
                        JOptionPane.showMessageDialog(Main.parent, tr("Ignoring malformed url: \"{0}\"", s));
                  else {
                        //DownloadTask osmTask = main.menu.download.downloadTasks.get(0);
                        DownloadTask osmTask = new DownloadOsmTask();
                        osmTask.download(main.menu.download, b.min.lat(), b.min.lon(), b.max.lat(), b.max.lon());
                  }
                  return;
            }

            if (s.startsWith("file:")) {
                  try {
                        main.menu.open.openFile(new File(new URI(s)));
                  } catch (URISyntaxException e) {
                        JOptionPane.showMessageDialog(Main.parent, tr("Ignoring malformed file url: \"{0}\"", s));
                  }
                  return;
            }

            final StringTokenizer st = new StringTokenizer(s, ",");
            if (st.countTokens() == 4) {
                  try {
                        DownloadTask task = rawGps ? new DownloadGpsTask() : new DownloadOsmTask();
                        task.download(main.menu.download, Double.parseDouble(st.nextToken()), Double.parseDouble(st.nextToken()), Double.parseDouble(st.nextToken()), Double.parseDouble(st.nextToken()));
                        return;
                  } catch (final NumberFormatException e) {
                  }
            }

            main.menu.open.openFile(new File(s));
      }
}

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