source: josm/trunk/src/org/openstreetmap/josm/actions/OpenFileAction.java@ 1196

// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm.actions;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.InputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.zip.GZIPInputStream;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.gui.layer.GpxLayer;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
import org.openstreetmap.josm.io.GpxReader;
import org.openstreetmap.josm.io.NmeaReader;
import org.openstreetmap.josm.io.OsmReader;
import org.xml.sax.SAXException;
import org.openstreetmap.josm.tools.Shortcut;

/**
 * Open a file chooser dialog and select an file to import. Then call the gpx-import
 * driver. Finally open an internal frame into the main window with the gpx data shown.
 *
 * @author imi
 */
public class OpenFileAction extends DiskAccessAction {

    /**
     * Create an open action. The name is "Open a file".
     */
    public OpenFileAction() {
        super(tr("Open ..."), "open", tr("Open a file."),
        Shortcut.registerShortcut("system:open", tr("File: {0}", tr("Open ...")), KeyEvent.VK_O, Shortcut.GROUP_MENU));
    }

    public void actionPerformed(ActionEvent e) {
        JFileChooser fc = createAndOpenFileChooser(true, true, null);
        if (fc == null)
            return;
        File[] files = fc.getSelectedFiles();
        for (int i = files.length; i > 0; --i)
            openFile(files[i-1]);
    }

    /**
     * Open the given file.
     */
    public void openFile(File file) {
        try {
            if (asGpxData(file.getName()))
                openFileAsGpx(file);
            else if (asNmeaData(file.getName()))
                openFileAsNmea(file);
            else
                openAsData(file);
        } catch (SAXException x) {
            x.printStackTrace();
            JOptionPane.showMessageDialog(Main.parent, tr("Error while parsing {0}",file.getName())+": "+x.getMessage());
        } catch (IOException x) {
            x.printStackTrace();
            JOptionPane.showMessageDialog(Main.parent, tr("Could not read \"{0}\"",file.getName())+"\n"+x.getMessage());
        }
    }

    private void openAsData(File file) throws SAXException, IOException, FileNotFoundException {
        String fn = file.getName();
        if (ExtensionFileFilter.filters[ExtensionFileFilter.OSM].acceptName(fn)) {
            OsmReader osm = OsmReader.parseDataSetOsm(new FileInputStream(file), null, Main.pleaseWaitDlg);
            DataSet dataSet = osm.getDs();
            OsmDataLayer layer = new OsmDataLayer(dataSet, file.getName(), file);
            Main.main.addLayer(layer);
            layer.fireDataChange();
            if (osm.getParseNotes().length() != 0) {
                /* display at most five lines */
                String notes = osm.getParseNotes();
                int j = 0;
                for (int i = 0; i < 5; i++) {
                    j = notes.indexOf('\n', j + 1);
                }
                JOptionPane.showMessageDialog(Main.parent, notes.substring(0, j));
            }
        }
        else
            JOptionPane.showMessageDialog(Main.parent, fn+": "+tr("Unknown file extension: {0}", fn.substring(file.getName().lastIndexOf('.')+1)));
    }

    private void openFileAsGpx(File file) throws SAXException, IOException, FileNotFoundException {
        String fn = file.getName();
        if (ExtensionFileFilter.filters[ExtensionFileFilter.GPX].acceptName(fn)) {
            GpxReader r = null;
            InputStream is;
            if (file.getName().endsWith(".gpx.gz")) {
                is = new GZIPInputStream(new FileInputStream(file));
            } else {
                is = new FileInputStream(file);
            }
            // Workaround for SAX BOM bug
            // http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6206835
            if(!((is.read()==0xef)&&(is.read()==0xbb)&&(is.read()==0xbf))) {
                is.close();
                if (file.getName().endsWith(".gpx.gz")) {
                    is = new GZIPInputStream(new FileInputStream(file));
                } else {
                    is = new FileInputStream(file);
                }
            }
            r = new GpxReader(is,file.getAbsoluteFile().getParentFile());
            r.data.storageFile = file;
            GpxLayer gpxLayer = new GpxLayer(r.data, fn);
            Main.main.addLayer(gpxLayer);
            if (Main.pref.getBoolean("marker.makeautomarkers", true)) {
                MarkerLayer ml = new MarkerLayer(r.data, tr("Markers from {0}", fn), file, gpxLayer);
                if (ml.data.size() > 0) {
                    Main.main.addLayer(ml);
                }
            }

        } else {
            throw new IllegalStateException();
        }
    }

    private void showNmeaInfobox(boolean success, NmeaReader r) {
        String msg = tr("Coordinates imported: ") + r.getNumberOfCoordinates() + "\n" +
        tr("Malformed sentences: ") + r.getParserMalformed() + "\n" +
        tr("Checksum errors: ") + r.getParserChecksumErrors() + "\n";
        if(!success) // don't scare the user unneccessarily
            msg += tr("Unknown sentences: ") + r.getParserUnknown() + "\n";
        msg += tr("Zero coordinates: ") + r.getParserZeroCoordinates();
        if(success) {
            JOptionPane.showMessageDialog(
                Main.parent, msg,
                tr("NMEA import success"),JOptionPane.INFORMATION_MESSAGE);
        } else {
            JOptionPane.showMessageDialog(
                Main.parent, msg,
                tr("NMEA import faliure!"),JOptionPane.ERROR_MESSAGE);
        }
    }

    private void openFileAsNmea(File file) throws IOException, FileNotFoundException {
        String fn = file.getName();
        if (ExtensionFileFilter.filters[ExtensionFileFilter.NMEA].acceptName(fn)) {
            NmeaReader r = new NmeaReader(new FileInputStream(file), file.getAbsoluteFile().getParentFile());
            if(r.getNumberOfCoordinates()>0) {
                r.data.storageFile = file;
                GpxLayer gpxLayer = new GpxLayer(r.data, fn);
                Main.main.addLayer(gpxLayer);
                if (Main.pref.getBoolean("marker.makeautomarkers", true)) {
                    MarkerLayer ml = new MarkerLayer(r.data, tr("Markers from {0}", fn), file, gpxLayer);
                    if (ml.data.size() > 0) {
                        Main.main.addLayer(ml);
                    }
                }
            }
            showNmeaInfobox(r.getNumberOfCoordinates()>0, r);
        } else {
            throw new IllegalStateException();
        }
    }

    private boolean asGpxData(String fn) {
        return ExtensionFileFilter.filters[ExtensionFileFilter.GPX].acceptName(fn);
    }

    private boolean asNmeaData(String fn) {
        return ExtensionFileFilter.filters[ExtensionFileFilter.NMEA].acceptName(fn);
    }


}