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	/*
	* Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package javax.swing.plaf.basic;

	import javax.swing.*;
	import javax.swing.filechooser.*;
	import javax.swing.filechooser.FileFilter;
	import javax.swing.event.*;
	import javax.swing.plaf.*;
	import java.awt.*;
	import java.awt.event.*;
	import java.awt.datatransfer.*;
	import java.beans.*;
	import java.io.*;
	import java.util.*;
	import java.util.List;
	import java.util.regex.*;
	import sun.awt.shell.ShellFolder;
	import sun.swing.*;
	import sun.swing.SwingUtilities2;

	/**
	* Basic L&F implementation of a FileChooser.
	*
	* @author Jeff Dinkins
	*/
	public class BasicFileChooserUI extends FileChooserUI {

	/* FileView icons */
	protected Icon directoryIcon = null;
	protected Icon fileIcon = null;
	protected Icon computerIcon = null;
	protected Icon hardDriveIcon = null;
	protected Icon floppyDriveIcon = null;

	protected Icon newFolderIcon = null;
	protected Icon upFolderIcon = null;
	protected Icon homeFolderIcon = null;
	protected Icon listViewIcon = null;
	protected Icon detailsViewIcon = null;
	protected Icon viewMenuIcon = null;

	protected int saveButtonMnemonic = 0;
	protected int openButtonMnemonic = 0;
	protected int cancelButtonMnemonic = 0;
	protected int updateButtonMnemonic = 0;
	protected int helpButtonMnemonic = 0;

	/**
	* The mnemonic keycode used for the approve button when a directory
	* is selected and the current selection mode is FILES_ONLY.
	*
	* @since 1.4
	*/
	protected int directoryOpenButtonMnemonic = 0;

	protected String saveButtonText = null;
	protected String openButtonText = null;
	protected String cancelButtonText = null;
	protected String updateButtonText = null;
	protected String helpButtonText = null;

	/**
	* The label text displayed on the approve button when a directory
	* is selected and the current selection mode is FILES_ONLY.
	*
	* @since 1.4
	*/
	protected String directoryOpenButtonText = null;

	private String openDialogTitleText = null;
	private String saveDialogTitleText = null;

	protected String saveButtonToolTipText = null;
	protected String openButtonToolTipText = null;
	protected String cancelButtonToolTipText = null;
	protected String updateButtonToolTipText = null;
	protected String helpButtonToolTipText = null;

	/**
	* The tooltip text displayed on the approve button when a directory
	* is selected and the current selection mode is FILES_ONLY.
	*
	* @since 1.4
	*/
	protected String directoryOpenButtonToolTipText = null;

	// Some generic FileChooser functions
	private Action approveSelectionAction = new ApproveSelectionAction();
	private Action cancelSelectionAction = new CancelSelectionAction();
	private Action updateAction = new UpdateAction();
	private Action newFolderAction;
	private Action goHomeAction = new GoHomeAction();
	private Action changeToParentDirectoryAction = new ChangeToParentDirectoryAction();

	private String newFolderErrorSeparator = null;
	private String newFolderErrorText = null;
	private String newFolderParentDoesntExistTitleText = null;
	private String newFolderParentDoesntExistText = null;
	private String fileDescriptionText = null;
	private String directoryDescriptionText = null;

	private JFileChooser filechooser = null;

	private boolean directorySelected = false;
	private File directory = null;

	private PropertyChangeListener propertyChangeListener = null;
	private AcceptAllFileFilter acceptAllFileFilter = new AcceptAllFileFilter();
	private FileFilter actualFileFilter = null;
	private GlobFilter globFilter = null;
	private BasicDirectoryModel model = null;
	private BasicFileView fileView = new BasicFileView();
	private boolean usesSingleFilePane;
	private boolean readOnly;

	// The accessoryPanel is a container to place the JFileChooser accessory component
	private JPanel accessoryPanel = null;
	private Handler handler;

	/**
	* Creates a {@code BasicFileChooserUI} implementation
	* for the specified component. By default
	* the {@code BasicLookAndFeel} class uses
	* {@code createUI} methods of all basic UIs classes
	* to instantiate UIs.
	*
	* @param c the {@code JFileChooser} which needs a UI
	* @return the {@code BasicFileChooserUI} object
	*
	* @see UIDefaults#getUI(JComponent)
	* @since 1.7
	*/
	public static ComponentUI createUI(JComponent c) {
	return new BasicFileChooserUI((JFileChooser) c);
	}

	public BasicFileChooserUI(JFileChooser b) {
	}

	public void installUI(JComponent c) {
	accessoryPanel = new JPanel(new BorderLayout());
	filechooser = (JFileChooser) c;

	createModel();

	clearIconCache();

	installDefaults(filechooser);
	installComponents(filechooser);
	installListeners(filechooser);
	filechooser.applyComponentOrientation(filechooser.getComponentOrientation());
	}

	public void uninstallUI(JComponent c) {
	uninstallListeners(filechooser);
	uninstallComponents(filechooser);
	uninstallDefaults(filechooser);

	if(accessoryPanel != null) {
	accessoryPanel.removeAll();
	}

	accessoryPanel = null;
	getFileChooser().removeAll();

	handler = null;
	}

	public void installComponents(JFileChooser fc) {
	}

	public void uninstallComponents(JFileChooser fc) {
	}

	protected void installListeners(JFileChooser fc) {
	propertyChangeListener = createPropertyChangeListener(fc);
	if(propertyChangeListener != null) {
	fc.addPropertyChangeListener(propertyChangeListener);
	}
	fc.addPropertyChangeListener(getModel());

	InputMap inputMap = getInputMap(JComponent.
	WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
	SwingUtilities.replaceUIInputMap(fc, JComponent.
	WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, inputMap);
	ActionMap actionMap = getActionMap();
	SwingUtilities.replaceUIActionMap(fc, actionMap);
	}

	InputMap getInputMap(int condition) {
	if (condition == JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) {
	return (InputMap)DefaultLookup.get(getFileChooser(), this,
	"FileChooser.ancestorInputMap");
	}
	return null;
	}

	ActionMap getActionMap() {
	return createActionMap();
	}

	ActionMap createActionMap() {
	ActionMap map = new ActionMapUIResource();

	Action refreshAction = new UIAction(FilePane.ACTION_REFRESH) {
	public void actionPerformed(ActionEvent evt) {
	getFileChooser().rescanCurrentDirectory();
	}
	};

	map.put(FilePane.ACTION_APPROVE_SELECTION, getApproveSelectionAction());
	map.put(FilePane.ACTION_CANCEL, getCancelSelectionAction());
	map.put(FilePane.ACTION_REFRESH, refreshAction);
	map.put(FilePane.ACTION_CHANGE_TO_PARENT_DIRECTORY,
	getChangeToParentDirectoryAction());
	return map;
	}


	protected void uninstallListeners(JFileChooser fc) {
	if(propertyChangeListener != null) {
	fc.removePropertyChangeListener(propertyChangeListener);
	}
	fc.removePropertyChangeListener(getModel());
	SwingUtilities.replaceUIInputMap(fc, JComponent.
	WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, null);
	SwingUtilities.replaceUIActionMap(fc, null);
	}


	protected void installDefaults(JFileChooser fc) {
	installIcons(fc);
	installStrings(fc);
	usesSingleFilePane = UIManager.getBoolean("FileChooser.usesSingleFilePane");
	readOnly = UIManager.getBoolean("FileChooser.readOnly");
	TransferHandler th = fc.getTransferHandler();
	if (th == null \|\| th instanceof UIResource) {
	fc.setTransferHandler(defaultTransferHandler);
	}
	LookAndFeel.installProperty(fc, "opaque", Boolean.FALSE);
	}

	protected void installIcons(JFileChooser fc) {
	directoryIcon = UIManager.getIcon("FileView.directoryIcon");
	fileIcon = UIManager.getIcon("FileView.fileIcon");
	computerIcon = UIManager.getIcon("FileView.computerIcon");
	hardDriveIcon = UIManager.getIcon("FileView.hardDriveIcon");
	floppyDriveIcon = UIManager.getIcon("FileView.floppyDriveIcon");

	newFolderIcon = UIManager.getIcon("FileChooser.newFolderIcon");
	upFolderIcon = UIManager.getIcon("FileChooser.upFolderIcon");
	homeFolderIcon = UIManager.getIcon("FileChooser.homeFolderIcon");
	detailsViewIcon = UIManager.getIcon("FileChooser.detailsViewIcon");
	listViewIcon = UIManager.getIcon("FileChooser.listViewIcon");
	viewMenuIcon = UIManager.getIcon("FileChooser.viewMenuIcon");
	}

	protected void installStrings(JFileChooser fc) {

	Locale l = fc.getLocale();
	newFolderErrorText = UIManager.getString("FileChooser.newFolderErrorText",l);
	newFolderErrorSeparator = UIManager.getString("FileChooser.newFolderErrorSeparator",l);

	newFolderParentDoesntExistTitleText = UIManager.getString("FileChooser.newFolderParentDoesntExistTitleText", l);
	newFolderParentDoesntExistText = UIManager.getString("FileChooser.newFolderParentDoesntExistText", l);

	fileDescriptionText = UIManager.getString("FileChooser.fileDescriptionText",l);
	directoryDescriptionText = UIManager.getString("FileChooser.directoryDescriptionText",l);

	saveButtonText = UIManager.getString("FileChooser.saveButtonText",l);
	openButtonText = UIManager.getString("FileChooser.openButtonText",l);
	saveDialogTitleText = UIManager.getString("FileChooser.saveDialogTitleText",l);
	openDialogTitleText = UIManager.getString("FileChooser.openDialogTitleText",l);
	cancelButtonText = UIManager.getString("FileChooser.cancelButtonText",l);
	updateButtonText = UIManager.getString("FileChooser.updateButtonText",l);
	helpButtonText = UIManager.getString("FileChooser.helpButtonText",l);
	directoryOpenButtonText = UIManager.getString("FileChooser.directoryOpenButtonText",l);

	saveButtonMnemonic = getMnemonic("FileChooser.saveButtonMnemonic", l);
	openButtonMnemonic = getMnemonic("FileChooser.openButtonMnemonic", l);
	cancelButtonMnemonic = getMnemonic("FileChooser.cancelButtonMnemonic", l);
	updateButtonMnemonic = getMnemonic("FileChooser.updateButtonMnemonic", l);
	helpButtonMnemonic = getMnemonic("FileChooser.helpButtonMnemonic", l);
	directoryOpenButtonMnemonic = getMnemonic("FileChooser.directoryOpenButtonMnemonic", l);

	saveButtonToolTipText = UIManager.getString("FileChooser.saveButtonToolTipText",l);
	openButtonToolTipText = UIManager.getString("FileChooser.openButtonToolTipText",l);
	cancelButtonToolTipText = UIManager.getString("FileChooser.cancelButtonToolTipText",l);
	updateButtonToolTipText = UIManager.getString("FileChooser.updateButtonToolTipText",l);
	helpButtonToolTipText = UIManager.getString("FileChooser.helpButtonToolTipText",l);
	directoryOpenButtonToolTipText = UIManager.getString("FileChooser.directoryOpenButtonToolTipText",l);
	}

	protected void uninstallDefaults(JFileChooser fc) {
	uninstallIcons(fc);
	uninstallStrings(fc);
	if (fc.getTransferHandler() instanceof UIResource) {
	fc.setTransferHandler(null);
	}
	}

	protected void uninstallIcons(JFileChooser fc) {
	directoryIcon = null;
	fileIcon = null;
	computerIcon = null;
	hardDriveIcon = null;
	floppyDriveIcon = null;

	newFolderIcon = null;
	upFolderIcon = null;
	homeFolderIcon = null;
	detailsViewIcon = null;
	listViewIcon = null;
	viewMenuIcon = null;
	}

	protected void uninstallStrings(JFileChooser fc) {
	saveButtonText = null;
	openButtonText = null;
	cancelButtonText = null;
	updateButtonText = null;
	helpButtonText = null;
	directoryOpenButtonText = null;

	saveButtonToolTipText = null;
	openButtonToolTipText = null;
	cancelButtonToolTipText = null;
	updateButtonToolTipText = null;
	helpButtonToolTipText = null;
	directoryOpenButtonToolTipText = null;
	}

	protected void createModel() {
	if (model != null) {
	model.invalidateFileCache();
	}
	model = new BasicDirectoryModel(getFileChooser());
	}

	public BasicDirectoryModel getModel() {
	return model;
	}

	public PropertyChangeListener createPropertyChangeListener(JFileChooser fc) {
	return null;
	}

	public String getFileName() {
	return null;
	}

	public String getDirectoryName() {
	return null;
	}

	public void setFileName(String filename) {
	}

	public void setDirectoryName(String dirname) {
	}

	public void rescanCurrentDirectory(JFileChooser fc) {
	}

	public void ensureFileIsVisible(JFileChooser fc, File f) {
	}

	public JFileChooser getFileChooser() {
	return filechooser;
	}

	public JPanel getAccessoryPanel() {
	return accessoryPanel;
	}

	protected JButton getApproveButton(JFileChooser fc) {
	return null;
	}

	public JButton getDefaultButton(JFileChooser fc) {
	return getApproveButton(fc);
	}

	public String getApproveButtonToolTipText(JFileChooser fc) {
	String tooltipText = fc.getApproveButtonToolTipText();
	if(tooltipText != null) {
	return tooltipText;
	}

	if(fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	return openButtonToolTipText;
	} else if(fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	return saveButtonToolTipText;
	}
	return null;
	}

	public void clearIconCache() {
	fileView.clearIconCache();
	}


	// ********************************************
	// ********** Create Listeners ************
	// ********************************************

	private Handler getHandler() {
	if (handler == null) {
	handler = new Handler();
	}
	return handler;
	}

	protected MouseListener createDoubleClickListener(JFileChooser fc,
	JList list) {
	return new Handler(list);
	}

	public ListSelectionListener createListSelectionListener(JFileChooser fc) {
	return getHandler();
	}

	private class Handler implements MouseListener, ListSelectionListener {
	JList list;

	Handler() {
	}

	Handler(JList list) {
	this.list = list;
	}

	public void mouseClicked(MouseEvent evt) {
	// Note: we can't depend on evt.getSource() because of backward
	// compatibility
	if (list != null &&
	SwingUtilities.isLeftMouseButton(evt) &&
	(evt.getClickCount()%2 == 0)) {

	int index = SwingUtilities2.loc2IndexFileList(list, evt.getPoint());
	if (index >= 0) {
	File f = (File)list.getModel().getElementAt(index);
	try {
	// Strip trailing ".."
	f = ShellFolder.getNormalizedFile(f);
	} catch (IOException ex) {
	// That's ok, we'll use f as is
	}
	if(getFileChooser().isTraversable(f)) {
	list.clearSelection();
	changeDirectory(f);
	} else {
	getFileChooser().approveSelection();
	}
	}
	}
	}

	public void mouseEntered(MouseEvent evt) {
	if (list != null) {
	TransferHandler th1 = getFileChooser().getTransferHandler();
	TransferHandler th2 = list.getTransferHandler();
	if (th1 != th2) {
	list.setTransferHandler(th1);
	}
	if (getFileChooser().getDragEnabled() != list.getDragEnabled()) {
	list.setDragEnabled(getFileChooser().getDragEnabled());
	}
	}
	}

	public void mouseExited(MouseEvent evt) {
	}

	public void mousePressed(MouseEvent evt) {
	}

	public void mouseReleased(MouseEvent evt) {
	}

	public void valueChanged(ListSelectionEvent evt) {
	if(!evt.getValueIsAdjusting()) {
	JFileChooser chooser = getFileChooser();
	FileSystemView fsv = chooser.getFileSystemView();
	JList list = (JList)evt.getSource();

	int fsm = chooser.getFileSelectionMode();
	boolean useSetDirectory = usesSingleFilePane &&
	(fsm == JFileChooser.FILES_ONLY);

	if (chooser.isMultiSelectionEnabled()) {
	File[] files = null;
	Object[] objects = list.getSelectedValues();
	if (objects != null) {
	if (objects.length == 1
	&& ((File)objects[0]).isDirectory()
	&& chooser.isTraversable(((File)objects[0]))
	&& (useSetDirectory \|\| !fsv.isFileSystem(((File)objects[0])))) {
	setDirectorySelected(true);
	setDirectory(((File)objects[0]));
	} else {
	ArrayList<File> fList = new ArrayList<File>(objects.length);
	for (Object object : objects) {
	File f = (File) object;
	boolean isDir = f.isDirectory();
	if ((chooser.isFileSelectionEnabled() && !isDir)
	\|\| (chooser.isDirectorySelectionEnabled()
	&& fsv.isFileSystem(f)
	&& isDir)) {
	fList.add(f);
	}
	}
	if (fList.size() > 0) {
	files = fList.toArray(new File[fList.size()]);
	}
	setDirectorySelected(false);
	}
	}
	chooser.setSelectedFiles(files);
	} else {
	File file = (File)list.getSelectedValue();
	if (file != null
	&& file.isDirectory()
	&& chooser.isTraversable(file)
	&& (useSetDirectory \|\| !fsv.isFileSystem(file))) {

	setDirectorySelected(true);
	setDirectory(file);
	if (usesSingleFilePane) {
	chooser.setSelectedFile(null);
	}
	} else {
	setDirectorySelected(false);
	if (file != null) {
	chooser.setSelectedFile(file);
	}
	}
	}
	}
	}
	}

	protected class DoubleClickListener extends MouseAdapter {
	// NOTE: This class exists only for backward compatibility. All
	// its functionality has been moved into Handler. If you need to add
	// new functionality add it to the Handler, but make sure this
	// class calls into the Handler.
	Handler handler;
	public DoubleClickListener(JList list) {
	handler = new Handler(list);
	}

	/**
	* The JList used for representing the files is created by subclasses, but the
	* selection is monitored in this class. The TransferHandler installed in the
	* JFileChooser is also installed in the file list as it is used as the actual
	* transfer source. The list is updated on a mouse enter to reflect the current
	* data transfer state of the file chooser.
	*/
	public void mouseEntered(MouseEvent e) {
	handler.mouseEntered(e);
	}

	public void mouseClicked(MouseEvent e) {
	handler.mouseClicked(e);
	}
	}

	protected class SelectionListener implements ListSelectionListener {
	// NOTE: This class exists only for backward compatibility. All
	// its functionality has been moved into Handler. If you need to add
	// new functionality add it to the Handler, but make sure this
	// class calls into the Handler.
	public void valueChanged(ListSelectionEvent e) {
	getHandler().valueChanged(e);
	}
	}

	/**
	* Property to remember whether a directory is currently selected in the UI.
	*
	* @return <code>true</code> iff a directory is currently selected.
	* @since 1.4
	*/
	protected boolean isDirectorySelected() {
	return directorySelected;
	}

	/**
	* Property to remember whether a directory is currently selected in the UI.
	* This is normally called by the UI on a selection event.
	*
	* @param b iff a directory is currently selected.
	* @since 1.4
	*/
	protected void setDirectorySelected(boolean b) {
	directorySelected = b;
	}

	/**
	* Property to remember the directory that is currently selected in the UI.
	*
	* @return the value of the <code>directory</code> property
	* @see #setDirectory
	* @since 1.4
	*/
	protected File getDirectory() {
	return directory;
	}

	/**
	* Property to remember the directory that is currently selected in the UI.
	* This is normally called by the UI on a selection event.
	*
	* @param f the <code>File</code> object representing the directory that is
	* currently selected
	* @since 1.4
	*/
	protected void setDirectory(File f) {
	directory = f;
	}

	/**
	* Returns the mnemonic for the given key.
	*/
	private int getMnemonic(String key, Locale l) {
	return SwingUtilities2.getUIDefaultsInt(key, l);
	}

	// *******************************************************
	// ********** FileChooser UI PLAF methods ************
	// *******************************************************

	/**
	* Returns the default accept all file filter
	*/
	public FileFilter getAcceptAllFileFilter(JFileChooser fc) {
	return acceptAllFileFilter;
	}


	public FileView getFileView(JFileChooser fc) {
	return fileView;
	}


	/**
	* Returns the title of this dialog
	*/
	public String getDialogTitle(JFileChooser fc) {
	String dialogTitle = fc.getDialogTitle();
	if (dialogTitle != null) {
	return dialogTitle;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	return openDialogTitleText;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	return saveDialogTitleText;
	} else {
	return getApproveButtonText(fc);
	}
	}


	public int getApproveButtonMnemonic(JFileChooser fc) {
	int mnemonic = fc.getApproveButtonMnemonic();
	if (mnemonic > 0) {
	return mnemonic;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	return openButtonMnemonic;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	return saveButtonMnemonic;
	} else {
	return mnemonic;
	}
	}

	public String getApproveButtonText(JFileChooser fc) {
	String buttonText = fc.getApproveButtonText();
	if (buttonText != null) {
	return buttonText;
	} else if (fc.getDialogType() == JFileChooser.OPEN_DIALOG) {
	return openButtonText;
	} else if (fc.getDialogType() == JFileChooser.SAVE_DIALOG) {
	return saveButtonText;
	} else {
	return null;
	}
	}


	// *****************************
	// *** Directory Actions ***
	// *****************************

	public Action getNewFolderAction() {
	if (newFolderAction == null) {
	newFolderAction = new NewFolderAction();
	// Note: Don't return null for readOnly, it might
	// break older apps.
	if (readOnly) {
	newFolderAction.setEnabled(false);
	}
	}
	return newFolderAction;
	}

	public Action getGoHomeAction() {
	return goHomeAction;
	}

	public Action getChangeToParentDirectoryAction() {
	return changeToParentDirectoryAction;
	}

	public Action getApproveSelectionAction() {
	return approveSelectionAction;
	}

	public Action getCancelSelectionAction() {
	return cancelSelectionAction;
	}

	public Action getUpdateAction() {
	return updateAction;
	}


	/**
	* Creates a new folder.
	*/
	protected class NewFolderAction extends AbstractAction {
	protected NewFolderAction() {
	super(FilePane.ACTION_NEW_FOLDER);
	}
	public void actionPerformed(ActionEvent e) {
	if (readOnly) {
	return;
	}
	JFileChooser fc = getFileChooser();
	File currentDirectory = fc.getCurrentDirectory();

	if (!currentDirectory.exists()) {
	JOptionPane.showMessageDialog(
	fc,
	newFolderParentDoesntExistText,
	newFolderParentDoesntExistTitleText, JOptionPane.WARNING_MESSAGE);
	return;
	}

	File newFolder;
	try {
	newFolder = fc.getFileSystemView().createNewFolder(currentDirectory);
	if (fc.isMultiSelectionEnabled()) {
	fc.setSelectedFiles(new File[] { newFolder });
	} else {
	fc.setSelectedFile(newFolder);
	}
	} catch (IOException exc) {
	JOptionPane.showMessageDialog(
	fc,
	newFolderErrorText + newFolderErrorSeparator + exc,
	newFolderErrorText, JOptionPane.ERROR_MESSAGE);
	return;
	}

	fc.rescanCurrentDirectory();
	}
	}

	/**
	* Acts on the "home" key event or equivalent event.
	*/
	protected class GoHomeAction extends AbstractAction {
	protected GoHomeAction() {
	super("Go Home");
	}
	public void actionPerformed(ActionEvent e) {
	JFileChooser fc = getFileChooser();
	changeDirectory(fc.getFileSystemView().getHomeDirectory());
	}
	}

	protected class ChangeToParentDirectoryAction extends AbstractAction {
	protected ChangeToParentDirectoryAction() {
	super("Go Up");
	putValue(Action.ACTION_COMMAND_KEY, FilePane.ACTION_CHANGE_TO_PARENT_DIRECTORY);
	}
	public void actionPerformed(ActionEvent e) {
	getFileChooser().changeToParentDirectory();
	}
	}

	/**
	* Responds to an Open or Save request
	*/
	protected class ApproveSelectionAction extends AbstractAction {
	protected ApproveSelectionAction() {
	super(FilePane.ACTION_APPROVE_SELECTION);
	}
	public void actionPerformed(ActionEvent e) {
	if (isDirectorySelected()) {
	File dir = getDirectory();
	if (dir != null) {
	try {
	// Strip trailing ".."
	dir = ShellFolder.getNormalizedFile(dir);
	} catch (IOException ex) {
	// Ok, use f as is
	}
	changeDirectory(dir);
	return;
	}
	}

	JFileChooser chooser = getFileChooser();

	String filename = getFileName();
	FileSystemView fs = chooser.getFileSystemView();
	File dir = chooser.getCurrentDirectory();

	if (filename != null) {
	// Remove whitespaces from end of filename
	int i = filename.length() - 1;

	while (i >=0 && filename.charAt(i) <= ' ') {
	i--;
	}

	filename = filename.substring(0, i + 1);
	}

	if (filename == null \|\| filename.length() == 0) {
	// no file selected, multiple selection off, therefore cancel the approve action
	resetGlobFilter();
	return;
	}

	File selectedFile = null;
	File[] selectedFiles = null;

	// Unix: Resolve '~' to user's home directory
	if (File.separatorChar == '/') {
	if (filename.startsWith("~/")) {
	filename = System.getProperty("user.home") + filename.substring(1);
	} else if (filename.equals("~")) {
	filename = System.getProperty("user.home");
	}
	}

	if (chooser.isMultiSelectionEnabled() && filename.length() > 1 &&
	filename.charAt(0) == '"' && filename.charAt(filename.length() - 1) == '"') {
	List<File> fList = new ArrayList<File>();

	String[] files = filename.substring(1, filename.length() - 1).split("\" \"");
	// Optimize searching files by names in "children" array
	Arrays.sort(files);

	File[] children = null;
	int childIndex = 0;

	for (String str : files) {
	File file = fs.createFileObject(str);
	if (!file.isAbsolute()) {
	if (children == null) {
	children = fs.getFiles(dir, false);
	Arrays.sort(children);
	}
	for (int k = 0; k < children.length; k++) {
	int l = (childIndex + k) % children.length;
	if (children[l].getName().equals(str)) {
	file = children[l];
	childIndex = l + 1;
	break;
	}
	}
	}
	fList.add(file);
	}

	if (!fList.isEmpty()) {
	selectedFiles = fList.toArray(new File[fList.size()]);
	}
	resetGlobFilter();
	} else {
	selectedFile = fs.createFileObject(filename);
	if (!selectedFile.isAbsolute()) {
	selectedFile = fs.getChild(dir, filename);
	}
	// check for wildcard pattern
	FileFilter currentFilter = chooser.getFileFilter();
	if (!selectedFile.exists() && isGlobPattern(filename)) {
	changeDirectory(selectedFile.getParentFile());
	if (globFilter == null) {
	globFilter = new GlobFilter();
	}
	try {
	globFilter.setPattern(selectedFile.getName());
	if (!(currentFilter instanceof GlobFilter)) {
	actualFileFilter = currentFilter;
	}
	chooser.setFileFilter(null);
	chooser.setFileFilter(globFilter);
	return;
	} catch (PatternSyntaxException pse) {
	// Not a valid glob pattern. Abandon filter.
	}
	}

	resetGlobFilter();

	// Check for directory change action
	boolean isDir = (selectedFile != null && selectedFile.isDirectory());
	boolean isTrav = (selectedFile != null && chooser.isTraversable(selectedFile));
	boolean isDirSelEnabled = chooser.isDirectorySelectionEnabled();
	boolean isFileSelEnabled = chooser.isFileSelectionEnabled();
	boolean isCtrl = (e != null && (e.getModifiers() &
	Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()) != 0);

	if (isDir && isTrav && (isCtrl \|\| !isDirSelEnabled)) {
	changeDirectory(selectedFile);
	return;
	} else if ((isDir \|\| !isFileSelEnabled)
	&& (!isDir \|\| !isDirSelEnabled)
	&& (!isDirSelEnabled \|\| selectedFile.exists())) {
	selectedFile = null;
	}
	}

	if (selectedFiles != null \|\| selectedFile != null) {
	if (selectedFiles != null \|\| chooser.isMultiSelectionEnabled()) {
	if (selectedFiles == null) {
	selectedFiles = new File[] { selectedFile };
	}
	chooser.setSelectedFiles(selectedFiles);
	// Do it again. This is a fix for bug 4949273 to force the
	// selected value in case the ListSelectionModel clears it
	// for non-existing file names.
	chooser.setSelectedFiles(selectedFiles);
	} else {
	chooser.setSelectedFile(selectedFile);
	}
	chooser.approveSelection();
	} else {
	if (chooser.isMultiSelectionEnabled()) {
	chooser.setSelectedFiles(null);
	} else {
	chooser.setSelectedFile(null);
	}
	chooser.cancelSelection();
	}
	}
	}


	private void resetGlobFilter() {
	if (actualFileFilter != null) {
	JFileChooser chooser = getFileChooser();
	FileFilter currentFilter = chooser.getFileFilter();
	if (currentFilter != null && currentFilter.equals(globFilter)) {
	chooser.setFileFilter(actualFileFilter);
	chooser.removeChoosableFileFilter(globFilter);
	}
	actualFileFilter = null;
	}
	}

	private static boolean isGlobPattern(String filename) {
	return ((File.separatorChar == '\\' && (filename.indexOf('*') >= 0
	\|\| filename.indexOf('?') >= 0))
	\|\| (File.separatorChar == '/' && (filename.indexOf('*') >= 0
	\|\| filename.indexOf('?') >= 0
	\|\| filename.indexOf('[') >= 0)));
	}


	/* A file filter which accepts file patterns containing
	* the special wildcards ? on Windows and ?[] on Unix.
	*/
	class GlobFilter extends FileFilter {
	Pattern pattern;
	String globPattern;

	public void setPattern(String globPattern) {
	char[] gPat = globPattern.toCharArray();
	char[] rPat = new char[gPat.length * 2];
	boolean isWin32 = (File.separatorChar == '\\');
	boolean inBrackets = false;
	int j = 0;

	this.globPattern = globPattern;

	if (isWin32) {
	// On windows, a pattern ending with . is equal to ending with *
	int len = gPat.length;
	if (globPattern.endsWith(".")) {
	len -= 2;
	}
	for (int i = 0; i < len; i++) {
	switch(gPat[i]) {
	case '*':
	rPat[j++] = '.';
	rPat[j++] = '*';
	break;

	case '?':
	rPat[j++] = '.';
	break;

	case '\\':
	rPat[j++] = '\\';
	rPat[j++] = '\\';
	break;

	default:
	if ("+()^$.{}[]".indexOf(gPat[i]) >= 0) {
	rPat[j++] = '\\';
	}
	rPat[j++] = gPat[i];
	break;
	}
	}
	} else {
	for (int i = 0; i < gPat.length; i++) {
	switch(gPat[i]) {
	case '*':
	if (!inBrackets) {
	rPat[j++] = '.';
	}
	rPat[j++] = '*';
	break;

	case '?':
	rPat[j++] = inBrackets ? '?' : '.';
	break;

	case '[':
	inBrackets = true;
	rPat[j++] = gPat[i];

	if (i < gPat.length - 1) {
	switch (gPat[i+1]) {
	case '!':
	case '^':
	rPat[j++] = '^';
	i++;
	break;

	case ']':
	rPat[j++] = gPat[++i];
	break;
	}
	}
	break;

	case ']':
	rPat[j++] = gPat[i];
	inBrackets = false;
	break;

	case '\\':
	if (i == 0 && gPat.length > 1 && gPat[1] == '~') {
	rPat[j++] = gPat[++i];
	} else {
	rPat[j++] = '\\';
	if (i < gPat.length - 1 && "*?[]".indexOf(gPat[i+1]) >= 0) {
	rPat[j++] = gPat[++i];
	} else {
	rPat[j++] = '\\';
	}
	}
	break;

	default:
	//if ("+()\|^$.{}<>".indexOf(gPat[i]) >= 0) {
	if (!Character.isLetterOrDigit(gPat[i])) {
	rPat[j++] = '\\';
	}
	rPat[j++] = gPat[i];
	break;
	}
	}
	}
	this.pattern = Pattern.compile(new String(rPat, 0, j), Pattern.CASE_INSENSITIVE);
	}

	public boolean accept(File f) {
	if (f == null) {
	return false;
	}
	if (f.isDirectory()) {
	return true;
	}
	return pattern.matcher(f.getName()).matches();
	}

	public String getDescription() {
	return globPattern;
	}
	}

	/**
	* Responds to a cancel request.
	*/
	protected class CancelSelectionAction extends AbstractAction {
	public void actionPerformed(ActionEvent e) {
	getFileChooser().cancelSelection();
	}
	}

	/**
	* Rescans the files in the current directory
	*/
	protected class UpdateAction extends AbstractAction {
	public void actionPerformed(ActionEvent e) {
	JFileChooser fc = getFileChooser();
	fc.setCurrentDirectory(fc.getFileSystemView().createFileObject(getDirectoryName()));
	fc.rescanCurrentDirectory();
	}
	}


	private void changeDirectory(File dir) {
	JFileChooser fc = getFileChooser();
	// Traverse shortcuts on Windows
	if (dir != null && FilePane.usesShellFolder(fc)) {
	try {
	ShellFolder shellFolder = ShellFolder.getShellFolder(dir);

	if (shellFolder.isLink()) {
	File linkedTo = shellFolder.getLinkLocation();

	// If linkedTo is null we try to use dir
	if (linkedTo != null) {
	if (fc.isTraversable(linkedTo)) {
	dir = linkedTo;
	} else {
	return;
	}
	} else {
	dir = shellFolder;
	}
	}
	} catch (FileNotFoundException ex) {
	return;
	}
	}
	fc.setCurrentDirectory(dir);
	if (fc.getFileSelectionMode() == JFileChooser.FILES_AND_DIRECTORIES &&
	fc.getFileSystemView().isFileSystem(dir)) {

	setFileName(dir.getAbsolutePath());
	}
	}


	// *****************************************
	// *** default AcceptAll file filter ***
	// *****************************************
	protected class AcceptAllFileFilter extends FileFilter {

	public AcceptAllFileFilter() {
	}

	public boolean accept(File f) {
	return true;
	}

	public String getDescription() {
	return UIManager.getString("FileChooser.acceptAllFileFilterText");
	}
	}


	// ***********************
	// * FileView operations *
	// ***********************
	protected class BasicFileView extends FileView {
	/* FileView type descriptions */
	// PENDING(jeff) - pass in the icon cache size
	protected Hashtable<File,Icon> iconCache = new Hashtable<File,Icon>();

	public BasicFileView() {
	}

	public void clearIconCache() {
	iconCache = new Hashtable<File,Icon>();
	}

	public String getName(File f) {
	// Note: Returns display name rather than file name
	String fileName = null;
	if(f != null) {
	fileName = getFileChooser().getFileSystemView().getSystemDisplayName(f);
	}
	return fileName;
	}


	public String getDescription(File f) {
	return f.getName();
	}

	public String getTypeDescription(File f) {
	String type = getFileChooser().getFileSystemView().getSystemTypeDescription(f);
	if (type == null) {
	if (f.isDirectory()) {
	type = directoryDescriptionText;
	} else {
	type = fileDescriptionText;
	}
	}
	return type;
	}

	public Icon getCachedIcon(File f) {
	return iconCache.get(f);
	}

	public void cacheIcon(File f, Icon i) {
	if(f == null \|\| i == null) {
	return;
	}
	iconCache.put(f, i);
	}

	public Icon getIcon(File f) {
	Icon icon = getCachedIcon(f);
	if(icon != null) {
	return icon;
	}
	icon = fileIcon;
	if (f != null) {
	FileSystemView fsv = getFileChooser().getFileSystemView();

	if (fsv.isFloppyDrive(f)) {
	icon = floppyDriveIcon;
	} else if (fsv.isDrive(f)) {
	icon = hardDriveIcon;
	} else if (fsv.isComputerNode(f)) {
	icon = computerIcon;
	} else if (f.isDirectory()) {
	icon = directoryIcon;
	}
	}
	cacheIcon(f, icon);
	return icon;
	}

	public Boolean isHidden(File f) {
	String name = f.getName();
	if(name != null && name.charAt(0) == '.') {
	return Boolean.TRUE;
	} else {
	return Boolean.FALSE;
	}
	}
	}

	private static final TransferHandler defaultTransferHandler = new FileTransferHandler();

	/**
	* Data transfer support for the file chooser. Since files are currently presented
	* as a list, the list support is reused with the added flavor of DataFlavor.javaFileListFlavor
	*/
	static class FileTransferHandler extends TransferHandler implements UIResource {

	/**
	* Create a Transferable to use as the source for a data transfer.
	*
	* @param c The component holding the data to be transfered. This
	* argument is provided to enable sharing of TransferHandlers by
	* multiple components.
	* @return The representation of the data to be transfered.
	*
	*/
	protected Transferable createTransferable(JComponent c) {
	Object[] values = null;
	if (c instanceof JList) {
	values = ((JList)c).getSelectedValues();
	} else if (c instanceof JTable) {
	JTable table = (JTable)c;
	int[] rows = table.getSelectedRows();
	if (rows != null) {
	values = new Object[rows.length];
	for (int i=0; i<rows.length; i++) {
	values[i] = table.getValueAt(rows[i], 0);
	}
	}
	}
	if (values == null \|\| values.length == 0) {
	return null;
	}

	StringBuffer plainBuf = new StringBuffer();
	StringBuffer htmlBuf = new StringBuffer();

	htmlBuf.append("<html>\n<body>\n<ul>\n");

	for (Object obj : values) {
	String val = ((obj == null) ? "" : obj.toString());
	plainBuf.append(val + "\n");
	htmlBuf.append(" <li>" + val + "\n");
	}

	// remove the last newline
	plainBuf.deleteCharAt(plainBuf.length() - 1);
	htmlBuf.append("</ul>\n</body>\n</html>");

	return new FileTransferable(plainBuf.toString(), htmlBuf.toString(), values);
	}

	public int getSourceActions(JComponent c) {
	return COPY;
	}

	static class FileTransferable extends BasicTransferable {

	Object[] fileData;

	FileTransferable(String plainData, String htmlData, Object[] fileData) {
	super(plainData, htmlData);
	this.fileData = fileData;
	}

	/**
	* Best format of the file chooser is DataFlavor.javaFileListFlavor.
	*/
	protected DataFlavor[] getRicherFlavors() {
	DataFlavor[] flavors = new DataFlavor[1];
	flavors[0] = DataFlavor.javaFileListFlavor;
	return flavors;
	}

	/**
	* The only richer format supported is the file list flavor
	*/
	protected Object getRicherData(DataFlavor flavor) {
	if (DataFlavor.javaFileListFlavor.equals(flavor)) {
	ArrayList<Object> files = new ArrayList<Object>();
	for (Object file : this.fileData) {
	files.add(file);
	}
	return files;
	}
	return null;
	}

	}
	}
	}

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