tim/prune/load/JpegLoader.java

   1 package tim.prune.load;
   2
   3 import java.awt.event.ActionEvent;
   4 import java.awt.event.ActionListener;
   5 import java.io.File;
   6 import java.util.ArrayList;
   7
   8 import javax.swing.BorderFactory;
   9 import javax.swing.BoxLayout;
  10 import javax.swing.JButton;
  11 import javax.swing.JCheckBox;
  12 import javax.swing.JDialog;
  13 import javax.swing.JFileChooser;
  14 import javax.swing.JFrame;
  15 import javax.swing.JLabel;
  16 import javax.swing.JOptionPane;
  17 import javax.swing.JPanel;
  18 import javax.swing.JProgressBar;
  19
  20 import tim.prune.App;
  21 import tim.prune.I18nManager;
  22 import tim.prune.data.Altitude;
  23 import tim.prune.data.DataPoint;
  24 import tim.prune.data.Latitude;
  25 import tim.prune.data.Longitude;
  26 import tim.prune.data.Photo;
  27 import tim.prune.data.PhotoStatus;
  28 import tim.prune.data.Timestamp;
  29 import tim.prune.drew.jpeg.ExifReader;
  30 import tim.prune.drew.jpeg.JpegData;
  31 import tim.prune.drew.jpeg.JpegException;
  32 import tim.prune.drew.jpeg.Rational;
  33
  34 /**
  35  * Class to manage the loading of Jpegs and dealing with the GPS data from them
  36  */
  37 public class JpegLoader implements Runnable
  38 {
  39         private App _app = null;
  40         private JFrame _parentFrame = null;
  41         private JFileChooser _fileChooser = null;
  42         private JCheckBox _subdirCheckbox = null;
  43         private JCheckBox _noExifCheckbox = null;
  44         private JDialog _progressDialog   = null;
  45         private JProgressBar _progressBar = null;
  46         private int[] _fileCounts = null;
  47         private boolean _cancelled = false;
  48         private ArrayList _photos = null;
  49
  50
  51         /**
  52          * Constructor
  53          * @param inApp Application object to inform of photo load
  54          * @param inParentFrame parent frame to reference for dialogs
  55          */
  56         public JpegLoader(App inApp, JFrame inParentFrame)
  57         {
  58                 _app = inApp;
  59                 _parentFrame = inParentFrame;
  60         }
  61
  62
  63         /**
  64          * Select an input file and open the GUI frame
  65          * to select load options
  66          */
  67         public void openFile()
  68         {
  69                 if (_fileChooser == null)
  70                 {
  71                         _fileChooser = new JFileChooser();
  72                         _fileChooser.setMultiSelectionEnabled(true);
  73                         _fileChooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
  74                         _fileChooser.setDialogTitle(I18nManager.getText("menu.file.addphotos"));
  75                         _subdirCheckbox = new JCheckBox(I18nManager.getText("dialog.jpegload.subdirectories"));
  76                         _subdirCheckbox.setSelected(true);
  77                         _noExifCheckbox = new JCheckBox(I18nManager.getText("dialog.jpegload.loadjpegswithoutcoords"));
  78                         _noExifCheckbox.setSelected(true);
  79                         JPanel panel = new JPanel();
  80                         panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
  81                         panel.add(_subdirCheckbox);
  82                         panel.add(_noExifCheckbox);
  83                         _fileChooser.setAccessory(panel);
  84                 }
  85                 if (_fileChooser.showOpenDialog(_parentFrame) == JFileChooser.APPROVE_OPTION)
  86                 {
  87                         // Bring up dialog before starting
  88                         showDialog();
  89                         new Thread(this).start();
  90                 }
  91         }
  92
  93
  94         /**
  95          * Show the main dialog
  96          */
  97         private void showDialog()
  98         {
  99                 _progressDialog = new JDialog(_parentFrame, I18nManager.getText("dialog.jpegload.progress.title"));
 100                 _progressDialog.setLocationRelativeTo(_parentFrame);
 101                 _progressBar = new JProgressBar(0, 100);
 102                 _progressBar.setValue(0);
 103                 _progressBar.setStringPainted(true);
 104                 _progressBar.setString("");
 105                 JPanel panel = new JPanel();
 106                 panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
 107                 panel.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3));
 108                 panel.add(new JLabel(I18nManager.getText("dialog.jpegload.progress")));
 109                 panel.add(_progressBar);
 110                 JButton cancelButton = new JButton(I18nManager.getText("button.cancel"));
 111                 cancelButton.addActionListener(new ActionListener() {
 112                         public void actionPerformed(ActionEvent e)
 113                         {
 114                                 _cancelled = true;
 115                         }
 116                 });
 117                 panel.add(cancelButton);
 118                 _progressDialog.getContentPane().add(panel);
 119                 _progressDialog.pack();
 120                 _progressDialog.show();
 121         }
 122
 123
 124         /**
 125          * Run method for performing tasks in separate thread
 126          */
 127         public void run()
 128         {
 129                 // Initialise arrays, errors, summaries
 130                 _fileCounts = new int[4]; // files, jpegs, exifs, gps
 131                 _photos = new ArrayList();
 132                 File[] files = _fileChooser.getSelectedFiles();
 133                 // Loop recursively over selected files/directories to count files
 134                 int numFiles = countFileList(files, true, _subdirCheckbox.isSelected());
 135                 // Set up the progress bar for this number of files
 136                 _progressBar.setMaximum(numFiles);
 137                 _progressBar.setValue(0);
 138                 _cancelled = false;
 139
 140                 // Process the files recursively and build lists of photos
 141                 processFileList(files, true, _subdirCheckbox.isSelected());
 142                 _progressDialog.hide();
 143                 if (_cancelled) {return;}
 144
 145                 //System.out.println("Finished - counts are: " + _fileCounts[0] + ", " + _fileCounts[1]
 146                 //  + ", " + _fileCounts[2] + ", " + _fileCounts[3]);
 147                 if (_fileCounts[0] == 0)
 148                 {
 149                         // No files found at all
 150                         JOptionPane.showMessageDialog(_parentFrame, I18nManager.getText("error.jpegload.nofilesfound"),
 151                                 I18nManager.getText("error.jpegload.dialogtitle"), JOptionPane.ERROR_MESSAGE);
 152                 }
 153                 else if (_fileCounts[1] == 0)
 154                 {
 155                         // No jpegs found
 156                         JOptionPane.showMessageDialog(_parentFrame, I18nManager.getText("error.jpegload.nojpegsfound"),
 157                                 I18nManager.getText("error.jpegload.dialogtitle"), JOptionPane.ERROR_MESSAGE);
 158                 }
 159                 else if (!_noExifCheckbox.isSelected() && _fileCounts[2] == 0)
 160                 {
 161                         // Need coordinates but no exif found
 162                         JOptionPane.showMessageDialog(_parentFrame, I18nManager.getText("error.jpegload.noexiffound"),
 163                                 I18nManager.getText("error.jpegload.dialogtitle"), JOptionPane.ERROR_MESSAGE);
 164                 }
 165                 else if (!_noExifCheckbox.isSelected() && _fileCounts[3] == 0)
 166                 {
 167                         // Need coordinates but no gps information found
 168                         JOptionPane.showMessageDialog(_parentFrame, I18nManager.getText("error.jpegload.nogpsfound"),
 169                                 I18nManager.getText("error.jpegload.dialogtitle"), JOptionPane.ERROR_MESSAGE);
 170                 }
 171                 else
 172                 {
 173                         // Found some photos to load
 174                         // TODO: Load jpeg information into dialog for confirmation?
 175                         // Pass information back to app
 176                         _app.informPhotosLoaded(_photos);
 177                 }
 178         }
 179
 180
 181         /**
 182          * Process a list of files and/or directories
 183          * @param inFiles array of file/directories
 184          * @param inFirstDir true if first directory
 185          * @param inDescend true to descend to subdirectories
 186          */
 187         private void processFileList(File[] inFiles, boolean inFirstDir, boolean inDescend)
 188         {
 189                 if (inFiles != null)
 190                 {
 191                         // Loop over elements in array
 192                         for (int i=0; i<inFiles.length; i++)
 193                         {
 194                                 File file = inFiles[i];
 195                                 if (file.exists() && file.canRead())
 196                                 {
 197                                         // Check whether it's a file or a directory
 198                                         if (file.isFile())
 199                                         {
 200                                                 processFile(file);
 201                                         }
 202                                         else if (file.isDirectory() && (inFirstDir || inDescend))
 203                                         {
 204                                                 // Always process first directory,
 205                                                 // only process subdirectories if checkbox selected
 206                                                 File[] files = file.listFiles();
 207                                                 processFileList(files, false, inDescend);
 208                                         }
 209                                 }
 210                                 else
 211                                 {
 212                                         // file doesn't exist or isn't readable - ignore error
 213                                 }
 214                                 // check for cancel button pressed
 215                                 if (_cancelled) break;
 216                         }
 217                 }
 218         }
 219
 220
 221         /**
 222          * Process the given file, by attempting to extract its tags
 223          * @param inFile file object to read
 224          */
 225         private void processFile(File inFile)
 226         {
 227                 // Update progress bar
 228                 _fileCounts[0]++; // file found
 229                 _progressBar.setValue(_fileCounts[0]);
 230                 _progressBar.setString("" + _fileCounts[0] + " / " + _progressBar.getMaximum());
 231                 _progressBar.repaint();
 232
 233                 // Check whether filename corresponds with accepted filenames
 234                 if (!acceptPhotoFilename(inFile.getName())) {return;}
 235
 236                 // Create Photo object
 237                 Photo photo = new Photo(inFile);
 238                 // Try to get information out of exif
 239                 try
 240                 {
 241                         JpegData jpegData = new ExifReader(inFile).extract();
 242                         _fileCounts[1]++; // jpeg found (no exception thrown)
 243                         if (jpegData.getExifDataPresent())
 244                                 {_fileCounts[2]++;} // exif found
 245                         if (jpegData.isValid())
 246                         {
 247                                 if (jpegData.getDatestamp() != null && jpegData.getTimestamp() != null)
 248                                 {
 249                                         photo.setTimestamp(createTimestamp(jpegData.getDatestamp(), jpegData.getTimestamp()));
 250                                 }
 251                                 // Make DataPoint and attach to Photo
 252                                 DataPoint point = createDataPoint(jpegData);
 253                                 point.setPhoto(photo);
 254                                 photo.setDataPoint(point);
 255                                 photo.setOriginalStatus(PhotoStatus.TAGGED);
 256                                 _fileCounts[3]++;
 257                         }
 258                 }
 259                 catch (JpegException jpe) { // don't list errors, just count them
 260                 }
 261                 // Use file timestamp if exif timestamp isn't available
 262                 if (photo.getTimestamp() == null)
 263                 {
 264                         photo.setTimestamp(new Timestamp(inFile.lastModified()));
 265                         //System.out.println("No exif, using timestamp from file: " + inFile.lastModified() + " -> " + photo.getTimestamp().getText());
 266                 }
 267                 else
 268                 {
 269                         //System.out.println("timestamp from file = " + photo.getTimestamp().getText());
 270                 }
 271                 // Add the photo if it's got a point or if pointless photos should be added
 272                 if (photo.getDataPoint() != null || _noExifCheckbox.isSelected())
 273                 {
 274                         _photos.add(photo);
 275                 }
 276         }
 277
 278
 279         /**
 280          * Recursively count the selected Files so we can draw a progress bar
 281          * @param inFiles file list
 282          * @param inFirstDir true if first directory
 283          * @param inDescend true to descend to subdirectories
 284          * @return count of the files selected
 285          */
 286         private int countFileList(File[] inFiles, boolean inFirstDir, boolean inDescend)
 287         {
 288                 int fileCount = 0;
 289                 if (inFiles != null)
 290                 {
 291                         // Loop over elements in array
 292                         for (int i=0; i<inFiles.length; i++)
 293                         {
 294                                 File file = inFiles[i];
 295                                 if (file.exists() && file.canRead())
 296                                 {
 297                                         // Check whether it's a file or a directory
 298                                         if (file.isFile())
 299                                         {
 300                                                 fileCount++;
 301                                         }
 302                                         else if (file.isDirectory() && (inFirstDir || inDescend))
 303                                         {
 304                                                 fileCount += countFileList(file.listFiles(), false, inDescend);
 305                                         }
 306                                 }
 307                         }
 308                 }
 309                 return fileCount;
 310         }
 311
 312
 313         /**
 314          * Create a DataPoint object from the given jpeg data
 315          * @param inData Jpeg data including coordinates
 316          * @return DataPoint object for Track
 317          */
 318         private static DataPoint createDataPoint(JpegData inData)
 319         {
 320                 // Create model objects from jpeg data
 321                 double latval = getCoordinateDoubleValue(inData.getLatitude(),
 322                         inData.getLatitudeRef() == 'N' || inData.getLatitudeRef() == 'n');
 323                 Latitude latitude = new Latitude(latval, Latitude.FORMAT_DEG_MIN_SEC);
 324                 double lonval = getCoordinateDoubleValue(inData.getLongitude(),
 325                         inData.getLongitudeRef() == 'E' || inData.getLongitudeRef() == 'e');
 326                 Longitude longitude = new Longitude(lonval, Longitude.FORMAT_DEG_MIN_SEC);
 327                 Altitude altitude = null;
 328                 if (inData.getAltitude() != null)
 329                 {
 330                         altitude = new Altitude(inData.getAltitude().intValue(), Altitude.FORMAT_METRES);
 331                 }
 332                 return new DataPoint(latitude, longitude, altitude);
 333         }
 334
 335
 336         /**
 337          * Convert an array of 3 Rational numbers into a double coordinate value
 338          * @param inRationals array of three Rational objects
 339          * @param isPositive true for positive hemisphere, for positive double value
 340          * @return double value of coordinate, either positive or negative
 341          */
 342         private static double getCoordinateDoubleValue(Rational[] inRationals, boolean isPositive)
 343         {
 344                 if (inRationals == null || inRationals.length != 3) return 0.0;
 345                 double value = inRationals[0].doubleValue()        // degrees
 346                         + inRationals[1].doubleValue() / 60.0          // minutes
 347                         + inRationals[2].doubleValue() / 60.0 / 60.0;  // seconds
 348                 // make sure it's the correct sign
 349                 value = Math.abs(value);
 350                 if (!isPositive) value = -value;
 351                 return value;
 352         }
 353
 354
 355         /**
 356          * Use the given Rational values to create a timestamp
 357          * @param inDate rationals describing date
 358          * @param inTime rationals describing time
 359          * @return Timestamp object corresponding to inputs
 360          */
 361         private static Timestamp createTimestamp(Rational[] inDate, Rational[] inTime)
 362         {
 363                 //System.out.println("Making timestamp for date (" + inDate[0].toString() + "," + inDate[1].toString() + "," + inDate[2].toString() + ") and time ("
 364                 //      + inTime[0].toString() + "," + inTime[1].toString() + "," + inTime[2].toString() + ")");
 365                 return new Timestamp(inDate[0].intValue(), inDate[1].intValue(), inDate[2].intValue(),
 366                         inTime[0].intValue(), inTime[1].intValue(), inTime[2].intValue());
 367         }
 368
 369
 370         /**
 371          * Check whether to accept the given filename
 372          * @param inName name of file
 373          * @return true if accepted, false otherwise
 374          */
 375         private static boolean acceptPhotoFilename(String inName)
 376         {
 377                 if (inName != null && inName.length() > 4)
 378                 {
 379                         // Check for three-character file extensions jpg and jpe
 380                         String lastFour = inName.substring(inName.length() - 4).toLowerCase();
 381                         if (lastFour.equals(".jpg") || lastFour.equals(".jpe"))
 382                         {
 383                                 return true;
 384                         }
 385                         // If not found, check for file extension jpeg
 386                         if (inName.length() > 5)
 387                         {
 388                                 String lastFive = inName.substring(inName.length() - 5).toLowerCase();
 389                                 if (lastFive.equals(".jpeg"))
 390                                 {
 391                                         return true;
 392                                 }
 393                         }
 394                 }
 395                 // Not matched so don't accept
 396                 return false;
 397         }
 398 }