/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */
package com.cburch.logisim.util;
import java.io.File;
import java.io.IOException;
import javax.swing.JFileChooser;
import com.cburch.logisim.prefs.AppPreferences;
public class JFileChoosers {
/* A user reported that JFileChooser's constructor sometimes resulted in
* IOExceptions when Logisim is installed under a system administrator
* account and then is attempted to run as a regular user. This class is
* an attempt to be a bit more robust about which directory the JFileChooser
* opens up under. (23 Feb 2010) */
private static class LogisimFileChooser extends JFileChooser {
LogisimFileChooser() {
super();
}
LogisimFileChooser(File initSelected) {
super(initSelected);
}
@Override
public File getSelectedFile() {
File dir = getCurrentDirectory();
if (dir != null) {
JFileChoosers.currentDirectory = dir.toString();
}
return super.getSelectedFile();
}
}
private static final String[] PROP_NAMES = {
null, "user.home", "user.dir", "java.home", "java.io.tmpdir" };
private static String currentDirectory = "";
private JFileChoosers() { }
public static String getCurrentDirectory() {
return currentDirectory;
}
public static JFileChooser create() {
RuntimeException first = null;
for (int i = 0; i < PROP_NAMES.length; i++) {
String prop = PROP_NAMES[i];
try {
String dirname;
if (prop == null) {
dirname = currentDirectory;
if (dirname.equals("")) {
dirname = AppPreferences.DIALOG_DIRECTORY.get();
}
} else {
dirname = System.getProperty(prop);
}
if (dirname.equals("")) {
return new LogisimFileChooser();
} else {
File dir = new File(dirname);
if (dir.canRead()) {
return new LogisimFileChooser(dir);
}
}
} catch (RuntimeException t) {
if (first == null) first = t;
Throwable u = t.getCause();
if (!(u instanceof IOException)) throw t;
}
}
throw first;
}
public static JFileChooser createAt(File openDirectory) {
if (openDirectory == null) {
return create();
} else {
try {
return new LogisimFileChooser(openDirectory);
} catch (RuntimeException t) {
if (t.getCause() instanceof IOException) {
try { return create(); }
catch (RuntimeException u) {}
}
throw t;
}
}
}
public static JFileChooser createSelected(File selected) {
if (selected == null) {
return create();
} else {
JFileChooser ret = createAt(selected.getParentFile());
ret.setSelectedFile(selected);
return ret;
}
}
}