package net.sf.jabref.external;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import javax.swing.JDialog;
import javax.swing.JProgressBar;
import javax.swing.SwingUtilities;
import net.sf.jabref.BaseAction;
import net.sf.jabref.BasePanel;
import net.sf.jabref.BibtexEntry;
import net.sf.jabref.GUIGlobals;
import net.sf.jabref.MetaData;
import net.sf.jabref.Util;
import net.sf.jabref.gui.FileListEntry;
import net.sf.jabref.gui.FileListTableModel;
/**
* This class handles the task of looking up all external files linked for a set
* of entries. This is useful for tasks where the user wants e.g. to send a database
* with external files included.
*/
public class AccessLinksForEntries {
/**
* Look up all external files linked from (at least) one of the entries in a set.
* This method does not verify the links.
*
* @param entries The set of entries.
* @return A list of FileListEntry objects pointing to the external files.
*/
public static List<FileListEntry> getExternalLinksForEntries(List<BibtexEntry> entries) {
List<FileListEntry> files = new ArrayList<FileListEntry>();
FileListTableModel model = new FileListTableModel();
for (Iterator<BibtexEntry> iterator = entries.iterator(); iterator.hasNext();) {
BibtexEntry entry = iterator.next();
String links = entry.getField(GUIGlobals.FILE_FIELD);
if (links == null)
continue;
model.setContent(links);
for (int i=0; i<model.getRowCount(); i++)
files.add(model.getEntry(i));
}
return files;
}
/**
* Take a list of external links and copy the referred files to a given directory.
* This method should be run off the Event Dispatch Thread. A progress bar, if given,
* will be updated on the EDT.
*
* @param files The list of file links.
* @param toDir The directory to copy the files to.
* @param metaData The MetaData for the database containing the external links. This is needed
* because the database might have its own file directory.
* @param prog A JProgressBar which will be updated to show the progress of the process.
* This argument can be null if no progress bar is needed.
* @param deleteOriginalFiles if true, the files in their original locations will be deleted
* after copying, for each file whose source directory is different from the destination
* directory differs.
* @param callback An ActionListener which should be notified when the process is finished.
* This parameter can be null if no callback is needed.
*/
public static void copyExternalLinksToDirectory(final List<FileListEntry> files, File toDir,
MetaData metaData, final JProgressBar prog,
boolean deleteOriginalFiles,
final ActionListener callback) {
if (prog != null) SwingUtilities.invokeLater(new Runnable() {
public void run() {
prog.setMaximum(files.size());
prog.setValue(0);
prog.setIndeterminate(false);
}
});
Set<String> fileNames = new HashSet<String>();
int i=0;
for (Iterator<FileListEntry> iterator = files.iterator(); iterator.hasNext();) {
FileListEntry entry = iterator.next();
File file = new File(entry.getLink());
// We try to check the extension for the file:
String name = file.getName();
int pos = name.lastIndexOf('.');
String extension = ((pos >= 0) && (pos < name.length() - 1)) ? name.substring(pos + 1)
.trim().toLowerCase() : null;
// Find the default directory for this field type, if any:
String dir = metaData.getFileDirectory(extension);
// Include the standard "file" directory:
String fileDir = metaData.getFileDirectory(GUIGlobals.FILE_FIELD);
// Include the directory of the bib file:
String databaseDir = metaData.getFile().getParent();
File tmp = Util.expandFilename(entry.getLink(),
new String[] { dir, fileDir, databaseDir });
if (tmp != null)
file = tmp;
// Check if we have arrived at an existing file:
if (file.exists()) {
if (fileNames.contains(name)) {
// Oops, a file of that name already exists....
}
else {
fileNames.add(name);
File destination = new File(toDir, name);
// Check if the source and destination locations differ:
if (!destination.equals(file)) {
try {
// Copy the file:
Util.copyFile(file, destination, false);
// Delete the original file if requested:
if (deleteOriginalFiles)
file.delete();
} catch (IOException ex) {
ex.printStackTrace();
}
}
else {
// Destination and source is the same. Do nothing.
}
// Update progress bar:
i++;
final int j = i;
if (prog != null) SwingUtilities.invokeLater(new Runnable() {
public void run() {
prog.setValue(j);
}
});
}
}
else {
// The link could not be resolved to an existing file.
}
}
if (callback != null) {
callback.actionPerformed(null);
}
}
public static class SaveWithLinkedFiles extends BaseAction {
private BasePanel panel;
public SaveWithLinkedFiles(BasePanel panel) {
this.panel = panel;
}
@Override
public void action() throws Throwable {
ArrayList<BibtexEntry> entries = new ArrayList<BibtexEntry>();
BibtexEntry[] sel = panel.getSelectedEntries();
for (int i = 0; i < sel.length; i++) {
BibtexEntry bibtexEntry = sel[i];
entries.add(bibtexEntry);
}
final List<FileListEntry> links =
AccessLinksForEntries.getExternalLinksForEntries(entries);
for (Iterator<FileListEntry> iterator = links.iterator(); iterator.hasNext();) {
FileListEntry entry = iterator.next();
System.out.println("Link: " + entry.getLink());
}
final JProgressBar prog = new JProgressBar();
prog.setIndeterminate(true);
final JDialog diag = new JDialog(panel.frame().getFrame(), false);
diag.getContentPane().add(prog, BorderLayout.CENTER);
diag.pack();
diag.setLocationRelativeTo(panel.frame());
diag.setVisible(true);
Thread t = new Thread(new Runnable() {
public void run() {
AccessLinksForEntries.copyExternalLinksToDirectory(links,
new File("/home/alver/tmp"), panel.metaData(), prog, false,
new ActionListener() {
public void actionPerformed(ActionEvent actionEvent) {
diag.dispose();
}
});
}
});
t.start();
}
}
}