/*
 * @(#)MetalFileChooserUI.java	1.93 06/05/24
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.swing.plaf.metal;

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.*;
import javax.accessibility.*;

import sun.awt.shell.ShellFolder;
import sun.swing.*;
import sun.swing.SwingUtilities2;

/**
 * Metal L&F implementation of a FileChooser.
 *
 * @version 1.93 05/24/06
 * @author Jeff Dinkins
 */
public class MetalFileChooserUI extends BasicFileChooserUI {

    // Much of the Metal UI for JFilechooser is just a copy of
    // the windows implementation, but using Metal themed buttons, lists,
    // icons, etc. We are planning a complete rewrite, and hence we've
    // made most things in this class private.

    private JLabel lookInLabel;
    private JComboBox directoryComboBox;
    private DirectoryComboBoxModel directoryComboBoxModel;
    private Action directoryComboBoxAction = new DirectoryComboBoxAction();

    private FilterComboBoxModel filterComboBoxModel;

    private JTextField fileNameTextField;

    private FilePane filePane;
    private JToggleButton listViewButton;
    private JToggleButton detailsViewButton;

    private boolean useShellFolder;

    private JButton approveButton;
    private JButton cancelButton;

    private JPanel buttonPanel;
    private JPanel bottomPanel;

    private JComboBox filterComboBox;

    private static final Dimension hstrut5 = new Dimension(5, 1);
    private static final Dimension hstrut11 = new Dimension(11, 1);

    private static final Dimension vstrut5  = new Dimension(1, 5);

    private static final Insets shrinkwrap = new Insets(0,0,0,0);

    // Preferred and Minimum sizes for the dialog box
    private static int PREF_WIDTH = 500;
    private static int PREF_HEIGHT = 326;
    private static Dimension PREF_SIZE = new Dimension(PREF_WIDTH, PREF_HEIGHT);

    private static int MIN_WIDTH = 500;
    private static int MIN_HEIGHT = 326;
    private static Dimension MIN_SIZE = new Dimension(MIN_WIDTH, MIN_HEIGHT);

    private static int LIST_PREF_WIDTH = 405;
    private static int LIST_PREF_HEIGHT = 135;
    private static Dimension LIST_PREF_SIZE = new Dimension(LIST_PREF_WIDTH, LIST_PREF_HEIGHT);

    // Labels, mnemonics, and tooltips (oh my!)
    private int    lookInLabelMnemonic = 0;
    private String lookInLabelText = null;
    private String saveInLabelText = null;

    private int    fileNameLabelMnemonic = 0;
    private String fileNameLabelText = null;

    private int    filesOfTypeLabelMnemonic = 0;
    private String filesOfTypeLabelText = null;

    private String upFolderToolTipText = null;
    private String upFolderAccessibleName = null;

    private String homeFolderToolTipText = null;
    private String homeFolderAccessibleName = null;

    private String newFolderToolTipText = null;
    private String newFolderAccessibleName = null;

    private String listViewButtonToolTipText = null;
    private String listViewButtonAccessibleName = null;

    private String detailsViewButtonToolTipText = null;
    private String detailsViewButtonAccessibleName = null;

    //
    // ComponentUI Interface Implementation methods
    //
    public static ComponentUI createUI(JComponent c) {
        return new MetalFileChooserUI((JFileChooser) c);
    }

    public MetalFileChooserUI(JFileChooser filechooser) {
	super(filechooser);
    }

    public void installUI(JComponent c) {
	super.installUI(c);
    }

    public void uninstallComponents(JFileChooser fc) {
	fc.removeAll();
	bottomPanel = null;
	buttonPanel = null;
    }

    private class MetalFileChooserUIAccessor implements FilePane.FileChooserUIAccessor {
	public JFileChooser getFileChooser() {
	    return MetalFileChooserUI.this.getFileChooser();
	}

	public BasicDirectoryModel getModel() {
	    return MetalFileChooserUI.this.getModel();
	}

	public JPanel createList() {
	    return MetalFileChooserUI.this.createList(getFileChooser());
	}

	public JPanel createDetailsView() {
	    return MetalFileChooserUI.this.createDetailsView(getFileChooser());
	}

	public boolean isDirectorySelected() {
	    return MetalFileChooserUI.this.isDirectorySelected();
	}

	public File getDirectory() {
	    return MetalFileChooserUI.this.getDirectory();
	}

	public Action getChangeToParentDirectoryAction() {
	    return MetalFileChooserUI.this.getChangeToParentDirectoryAction();
	}

	public Action getApproveSelectionAction() {
	    return MetalFileChooserUI.this.getApproveSelectionAction();
	}

	public Action getNewFolderAction() {
	    return MetalFileChooserUI.this.getNewFolderAction();
	}

	public MouseListener createDoubleClickListener(JList list) {
	    return MetalFileChooserUI.this.createDoubleClickListener(getFileChooser(),
								     list);
	}

	public ListSelectionListener createListSelectionListener() {
	    return MetalFileChooserUI.this.createListSelectionListener(getFileChooser());
	}
    }

    public void installComponents(JFileChooser fc) {
	FileSystemView fsv = fc.getFileSystemView();

	fc.setBorder(new EmptyBorder(12, 12, 11, 11));
	fc.setLayout(new BorderLayout(0, 11));

	filePane = new FilePane(new MetalFileChooserUIAccessor());
	fc.addPropertyChangeListener(filePane);

	updateUseShellFolder();

	// ********************************* //
	// **** Construct the top panel **** //
	// ********************************* //

	// Directory manipulation buttons
	JPanel topPanel = new JPanel(new BorderLayout(11, 0));
	JPanel topButtonPanel = new JPanel();
	topButtonPanel.setLayout(new BoxLayout(topButtonPanel, BoxLayout.LINE_AXIS));
	topPanel.add(topButtonPanel, BorderLayout.AFTER_LINE_ENDS);

	// Add the top panel to the fileChooser
	fc.add(topPanel, BorderLayout.NORTH);

	// ComboBox Label
     	lookInLabel = new JLabel(lookInLabelText);
     	lookInLabel.setDisplayedMnemonic(lookInLabelMnemonic);
	topPanel.add(lookInLabel, BorderLayout.BEFORE_LINE_BEGINS);

	// CurrentDir ComboBox
	directoryComboBox = new JComboBox() {
	    public Dimension getPreferredSize() {
		Dimension d = super.getPreferredSize();
		// Must be small enough to not affect total width.
		d.width = 150;
		return d;
	    }
	};
        directoryComboBox.putClientProperty(AccessibleContext.ACCESSIBLE_DESCRIPTION_PROPERTY,
                                            lookInLabelText);
	directoryComboBox.putClientProperty( "JComboBox.isTableCellEditor", Boolean.TRUE );
	lookInLabel.setLabelFor(directoryComboBox);
	directoryComboBoxModel = createDirectoryComboBoxModel(fc);
	directoryComboBox.setModel(directoryComboBoxModel);
	directoryComboBox.addActionListener(directoryComboBoxAction);
	directoryComboBox.setRenderer(createDirectoryComboBoxRenderer(fc));
	directoryComboBox.setAlignmentX(JComponent.LEFT_ALIGNMENT);
	directoryComboBox.setAlignmentY(JComponent.TOP_ALIGNMENT);
	directoryComboBox.setMaximumRowCount(8);

	topPanel.add(directoryComboBox, BorderLayout.CENTER);

	// Up Button
	JButton upFolderButton = new JButton(getChangeToParentDirectoryAction());
	upFolderButton.setText(null);
	upFolderButton.setIcon(upFolderIcon);
        upFolderButton.setToolTipText(upFolderToolTipText);
        upFolderButton.putClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY,
                                         upFolderAccessibleName);
	upFolderButton.setAlignmentX(JComponent.LEFT_ALIGNMENT);
	upFolderButton.setAlignmentY(JComponent.CENTER_ALIGNMENT);
	upFolderButton.setMargin(shrinkwrap);

	topButtonPanel.add(upFolderButton);
	topButtonPanel.add(Box.createRigidArea(hstrut5));

	// Home Button
	File homeDir = fsv.getHomeDirectory();
	String toolTipText = homeFolderToolTipText;
	if (fsv.isRoot(homeDir)) {
	    toolTipText = getFileView(fc).getName(homeDir); // Probably "Desktop".
	}




	JButton b = new JButton(homeFolderIcon);
     	b.setToolTipText(toolTipText);
        b.putClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY,
                            homeFolderAccessibleName);
	b.setAlignmentX(JComponent.LEFT_ALIGNMENT);
	b.setAlignmentY(JComponent.CENTER_ALIGNMENT);
	b.setMargin(shrinkwrap);

	b.addActionListener(getGoHomeAction());
	topButtonPanel.add(b);
	topButtonPanel.add(Box.createRigidArea(hstrut5));

	// New Directory Button
	if (!UIManager.getBoolean("FileChooser.readOnly")) {
	    b = new JButton(filePane.getNewFolderAction());
	    b.setText(null);
	    b.setIcon(newFolderIcon);
	    b.setToolTipText(newFolderToolTipText);
            b.putClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY,
                                newFolderAccessibleName);
	    b.setAlignmentX(JComponent.LEFT_ALIGNMENT);
	    b.setAlignmentY(JComponent.CENTER_ALIGNMENT);
	    b.setMargin(shrinkwrap);
	}
	topButtonPanel.add(b);
	topButtonPanel.add(Box.createRigidArea(hstrut5));

	// View button group
	ButtonGroup viewButtonGroup = new ButtonGroup();

	// List Button
	listViewButton = new JToggleButton(listViewIcon);
     	listViewButton.setToolTipText(listViewButtonToolTipText);
        listViewButton.putClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY,
                                         listViewButtonAccessibleName);
	listViewButton.setSelected(true);
	listViewButton.setAlignmentX(JComponent.LEFT_ALIGNMENT);
	listViewButton.setAlignmentY(JComponent.CENTER_ALIGNMENT);
	listViewButton.setMargin(shrinkwrap);
	listViewButton.addActionListener(filePane.getViewTypeAction(FilePane.VIEWTYPE_LIST));
	topButtonPanel.add(listViewButton);
	viewButtonGroup.add(listViewButton);

	// Details Button
	detailsViewButton = new JToggleButton(detailsViewIcon);
     	detailsViewButton.setToolTipText(detailsViewButtonToolTipText);
        detailsViewButton.putClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY,
                                            detailsViewButtonAccessibleName);
	detailsViewButton.setAlignmentX(JComponent.LEFT_ALIGNMENT);
	detailsViewButton.setAlignmentY(JComponent.CENTER_ALIGNMENT);
	detailsViewButton.setMargin(shrinkwrap);
	detailsViewButton.addActionListener(filePane.getViewTypeAction(FilePane.VIEWTYPE_DETAILS));
	topButtonPanel.add(detailsViewButton);
	viewButtonGroup.add(detailsViewButton);

	filePane.addPropertyChangeListener(new PropertyChangeListener() {
	    public void propertyChange(PropertyChangeEvent e) {
		if ("viewType".equals(e.getPropertyName())) {
		    int viewType = filePane.getViewType();
		    switch (viewType) {
		      case FilePane.VIEWTYPE_LIST:
			listViewButton.setSelected(true);
			break;

		      case FilePane.VIEWTYPE_DETAILS:
			detailsViewButton.setSelected(true);
			break;
		    }
		}
	    }
	});

	// ************************************** //
	// ******* Add the directory pane ******* //
	// ************************************** //
	fc.add(getAccessoryPanel(), BorderLayout.AFTER_LINE_ENDS);
	JComponent accessory = fc.getAccessory();
	if(accessory != null) {
	    getAccessoryPanel().add(accessory);
	}
	filePane.setPreferredSize(LIST_PREF_SIZE);
	fc.add(filePane, BorderLayout.CENTER);

	// ********************************** //
	// **** Construct the bottom panel ** //
	// ********************************** //
	JPanel bottomPanel = getBottomPanel();
	bottomPanel.setLayout(new BoxLayout(bottomPanel, BoxLayout.Y_AXIS));
	fc.add(bottomPanel, BorderLayout.SOUTH);

	// FileName label and textfield
	JPanel fileNamePanel = new JPanel();
	fileNamePanel.setLayout(new BoxLayout(fileNamePanel, BoxLayout.LINE_AXIS));
	bottomPanel.add(fileNamePanel);
	bottomPanel.add(Box.createRigidArea(vstrut5));

     	AlignedLabel fileNameLabel = new AlignedLabel(fileNameLabelText);
     	fileNameLabel.setDisplayedMnemonic(fileNameLabelMnemonic);
	fileNamePanel.add(fileNameLabel);

	fileNameTextField = new JTextField(35) {
	    public Dimension getMaximumSize() {
		return new Dimension(Short.MAX_VALUE, super.getPreferredSize().height);
	    }
	};
	fileNamePanel.add(fileNameTextField);
	fileNameLabel.setLabelFor(fileNameTextField);
        fileNameTextField.addFocusListener(
	    new FocusAdapter() {
		public void focusGained(FocusEvent e) {
		    if (!getFileChooser().isMultiSelectionEnabled()) {
			filePane.clearSelection();
		    }
		}
	    }
        );
	if (fc.isMultiSelectionEnabled()) {
	    setFileName(fileNameString(fc.getSelectedFiles()));
	} else {
	    setFileName(fileNameString(fc.getSelectedFile()));
	}


	// Filetype label and combobox
	JPanel filesOfTypePanel = new JPanel();
	filesOfTypePanel.setLayout(new BoxLayout(filesOfTypePanel, BoxLayout.LINE_AXIS));
	bottomPanel.add(filesOfTypePanel);

     	AlignedLabel filesOfTypeLabel = new AlignedLabel(filesOfTypeLabelText);
     	filesOfTypeLabel.setDisplayedMnemonic(filesOfTypeLabelMnemonic);
	filesOfTypePanel.add(filesOfTypeLabel);

	filterComboBoxModel = createFilterComboBoxModel();
	fc.addPropertyChangeListener(filterComboBoxModel);
	filterComboBox = new JComboBox(filterComboBoxModel);
        filterComboBox.putClientProperty(AccessibleContext.ACCESSIBLE_DESCRIPTION_PROPERTY,
                                         filesOfTypeLabelText);
	filesOfTypeLabel.setLabelFor(filterComboBox);
	filterComboBox.setRenderer(createFilterComboBoxRenderer());
	filesOfTypePanel.add(filterComboBox);

	// buttons
	getButtonPanel().setLayout(new ButtonAreaLayout());

	approveButton = new JButton(getApproveButtonText(fc));
	// Note: Metal does not use mnemonics for approve and cancel
	approveButton.addActionListener(getApproveSelectionAction());
	approveButton.setToolTipText(getApproveButtonToolTipText(fc));
	getButtonPanel().add(approveButton);

	cancelButton = new JButton(cancelButtonText);
	cancelButton.setToolTipText(cancelButtonToolTipText);
	cancelButton.addActionListener(getCancelSelectionAction());
	getButtonPanel().add(cancelButton);

	if(fc.getControlButtonsAreShown()) {
	    addControlButtons();
	}

	groupLabels(new AlignedLabel[] { fileNameLabel, filesOfTypeLabel });
    }

    private void updateUseShellFolder() {
	// Decide whether to use the ShellFolder class to populate shortcut
	// panel and combobox.
	JFileChooser fc = getFileChooser();
	Boolean prop =
	    (Boolean)fc.getClientProperty("FileChooser.useShellFolder");
	if (prop != null) {
	    useShellFolder = prop.booleanValue();
	} else {
	    // See if FileSystemView.getRoots() returns the desktop folder,
	    // i.e. the normal Windows hierarchy.
	    useShellFolder = false;
	    File[] roots = fc.getFileSystemView().getRoots();
	    if (roots != null && roots.length == 1) {
		File[] cbFolders = (File[])ShellFolder.get("fileChooserComboBoxFolders");
		if (cbFolders != null && cbFolders.length > 0 && roots[0] == cbFolders[0]) {
		    useShellFolder = true;
		}
	    }
	}
    }

    protected JPanel getButtonPanel() {
	if (buttonPanel == null) {
	    buttonPanel = new JPanel();
	}
	return buttonPanel;
    }

    protected JPanel getBottomPanel() {
	if(bottomPanel == null) {
	    bottomPanel = new JPanel();
	}
	return bottomPanel;
    }

    protected void installStrings(JFileChooser fc) {
	super.installStrings(fc);

        Locale l = fc.getLocale();

	lookInLabelMnemonic = UIManager.getInt("FileChooser.lookInLabelMnemonic"); 
	lookInLabelText = UIManager.getString("FileChooser.lookInLabelText",l);
	saveInLabelText = UIManager.getString("FileChooser.saveInLabelText",l);
	
	fileNameLabelMnemonic = UIManager.getInt("FileChooser.fileNameLabelMnemonic");  
	fileNameLabelText = UIManager.getString("FileChooser.fileNameLabelText",l); 
	
	filesOfTypeLabelMnemonic = UIManager.getInt("FileChooser.filesOfTypeLabelMnemonic");  
	filesOfTypeLabelText = UIManager.getString("FileChooser.filesOfTypeLabelText",l); 
	
	upFolderToolTipText =  UIManager.getString("FileChooser.upFolderToolTipText",l);
	upFolderAccessibleName = UIManager.getString("FileChooser.upFolderAccessibleName",l); 
	
	homeFolderToolTipText =  UIManager.getString("FileChooser.homeFolderToolTipText",l);
	homeFolderAccessibleName = UIManager.getString("FileChooser.homeFolderAccessibleName",l); 
	
	newFolderToolTipText = UIManager.getString("FileChooser.newFolderToolTipText",l);
	newFolderAccessibleName = UIManager.getString("FileChooser.newFolderAccessibleName",l); 
	
	listViewButtonToolTipText = UIManager.getString("FileChooser.listViewButtonToolTipText",l); 
	listViewButtonAccessibleName = UIManager.getString("FileChooser.listViewButtonAccessibleName",l); 
	
	detailsViewButtonToolTipText = UIManager.getString("FileChooser.detailsViewButtonToolTipText",l); 
	detailsViewButtonAccessibleName = UIManager.getString("FileChooser.detailsViewButtonAccessibleName",l); 
    }

    protected void installListeners(JFileChooser fc) {
	super.installListeners(fc);
        ActionMap actionMap = getActionMap();
        SwingUtilities.replaceUIActionMap(fc, actionMap);
    }

    protected ActionMap getActionMap() {
        return createActionMap();
    }

    protected ActionMap createActionMap() {
        ActionMap map = new ActionMapUIResource();
	FilePane.addActionsToMap(map, filePane.getActions());
        return map;
    }

    protected JPanel createList(JFileChooser fc) {
	return filePane.createList();
    }

    protected JPanel createDetailsView(JFileChooser fc) {
	return filePane.createDetailsView();
    }

    /**
     * Creates a selection listener for the list of files and directories.
     *
     * @param fc a <code>JFileChooser</code>
     * @return a <code>ListSelectionListener</code>
     */
    public ListSelectionListener createListSelectionListener(JFileChooser fc) {
	return super.createListSelectionListener(fc);
    }

    // Obsolete class, not used in this version.
    protected class SingleClickListener extends MouseAdapter {
	public  SingleClickListener(JList list) {
	}
    }

    // Obsolete class, not used in this version.
    protected class FileRenderer extends DefaultListCellRenderer  {
    }

    public void uninstallUI(JComponent c) {
	// Remove listeners
	c.removePropertyChangeListener(filterComboBoxModel);
	c.removePropertyChangeListener(filePane);
	cancelButton.removeActionListener(getCancelSelectionAction());
	approveButton.removeActionListener(getApproveSelectionAction());
	fileNameTextField.removeActionListener(getApproveSelectionAction());

	if (filePane != null) {
	    filePane.uninstallUI();
	    filePane = null;
	}

	super.uninstallUI(c);
    }

    /**
     * Returns the preferred size of the specified
     * <code>JFileChooser</code>.
     * The preferred size is at least as large,
     * in both height and width,
     * as the preferred size recommended
     * by the file chooser's layout manager.
     *
     * @param c  a <code>JFileChooser</code>
     * @return   a <code>Dimension</code> specifying the preferred
     *           width and height of the file chooser
     */
    public Dimension getPreferredSize(JComponent c) {
	int prefWidth = PREF_SIZE.width;
	Dimension d = c.getLayout().preferredLayoutSize(c);
	if (d != null) {
	    return new Dimension(d.width < prefWidth ? prefWidth : d.width,
				 d.height < PREF_SIZE.height ? PREF_SIZE.height : d.height);
	} else {
	    return new Dimension(prefWidth, PREF_SIZE.height);
	}
    }

    /**
     * Returns the minimum size of the <code>JFileChooser</code>.
     *
     * @param c  a <code>JFileChooser</code>
     * @return   a <code>Dimension</code> specifying the minimum
     *           width and height of the file chooser
     */
    public Dimension getMinimumSize(JComponent c) {
	return MIN_SIZE;
    }

    /**
     * Returns the maximum size of the <code>JFileChooser</code>.
     *
     * @param c  a <code>JFileChooser</code>
     * @return   a <code>Dimension</code> specifying the maximum 
     *           width and height of the file chooser
     */
    public Dimension getMaximumSize(JComponent c) {
	return new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE);
    }

    private String fileNameString(File file) {
	if (file == null) {
	    return null;
	} else {
	    JFileChooser fc = getFileChooser();
	    if ((fc.isDirectorySelectionEnabled() && !fc.isFileSelectionEnabled()) ||
	        (fc.isDirectorySelectionEnabled() && fc.isFileSelectionEnabled() && fc.getFileSystemView().isFileSystemRoot(file))) {
		return file.getPath();
	    } else {
		return file.getName();
	    }
	}
    }

    private String fileNameString(File[] files) {
	StringBuffer buf = new StringBuffer();
	for (int i = 0; files != null && i < files.length; i++) {
	    if (i > 0) {
		buf.append(" ");
	    }
	    if (files.length > 1) {
		buf.append("\"");
	    }
	    buf.append(fileNameString(files[i]));
	    if (files.length > 1) {
		buf.append("\"");
	    }
	}
	return buf.toString();
    }

    /* The following methods are used by the PropertyChange Listener */

    private void doSelectedFileChanged(PropertyChangeEvent e) {
	File f = (File) e.getNewValue();
	JFileChooser fc = getFileChooser();
	if (f != null 
	    && ((fc.isFileSelectionEnabled() && !f.isDirectory())
		|| (f.isDirectory() && fc.isDirectorySelectionEnabled()))) {

	    setFileName(fileNameString(f));
	}
    }
    
    private void doSelectedFilesChanged(PropertyChangeEvent e) {
	File[] files = (File[]) e.getNewValue();
	JFileChooser fc = getFileChooser();
	if (files != null
	    && files.length > 0
	    && (files.length > 1 || fc.isDirectorySelectionEnabled() || !files[0].isDirectory())) {
	    setFileName(fileNameString(files));
	}
    }
    
    private void doDirectoryChanged(PropertyChangeEvent e) {
	JFileChooser fc = getFileChooser();
	FileSystemView fsv = fc.getFileSystemView();

	clearIconCache();
	File currentDirectory = fc.getCurrentDirectory();
	if(currentDirectory != null) {
	    directoryComboBoxModel.addItem(currentDirectory);

	    if (fc.isDirectorySelectionEnabled() && !fc.isFileSelectionEnabled()) {
		if (fsv.isFileSystem(currentDirectory)) {
		    setFileName(currentDirectory.getPath());
		} else {
		    setFileName(null);
		}
	    }
	}
    }

    private void doFilterChanged(PropertyChangeEvent e) {
	clearIconCache();
    }

    private void doFileSelectionModeChanged(PropertyChangeEvent e) {
	clearIconCache();

	JFileChooser fc = getFileChooser();
	File currentDirectory = fc.getCurrentDirectory();
	if (currentDirectory != null
	    && fc.isDirectorySelectionEnabled()
	    && !fc.isFileSelectionEnabled()
	    && fc.getFileSystemView().isFileSystem(currentDirectory)) {

	    setFileName(currentDirectory.getPath());
	} else {
	    setFileName(null);
	}
    }

    private void doAccessoryChanged(PropertyChangeEvent e) {
	if(getAccessoryPanel() != null) {
	    if(e.getOldValue() != null) {
		getAccessoryPanel().remove((JComponent) e.getOldValue());
	    }
	    JComponent accessory = (JComponent) e.getNewValue();
	    if(accessory != null) {
		getAccessoryPanel().add(accessory, BorderLayout.CENTER);
	    }
	}
    }

    private void doApproveButtonTextChanged(PropertyChangeEvent e) {
	JFileChooser chooser = getFileChooser();
	approveButton.setText(getApproveButtonText(chooser));
	approveButton.setToolTipText(getApproveButtonToolTipText(chooser));
    }

    private void doDialogTypeChanged(PropertyChangeEvent e) {
	JFileChooser chooser = getFileChooser();
	approveButton.setText(getApproveButtonText(chooser));
	approveButton.setToolTipText(getApproveButtonToolTipText(chooser));
	if (chooser.getDialogType() == JFileChooser.SAVE_DIALOG) {
	    lookInLabel.setText(saveInLabelText);
	} else {
	    lookInLabel.setText(lookInLabelText);
	}
    }

    private void doApproveButtonMnemonicChanged(PropertyChangeEvent e) {
	// Note: Metal does not use mnemonics for approve and cancel
    }

    private void doControlButtonsChanged(PropertyChangeEvent e) {
	if(getFileChooser().getControlButtonsAreShown()) {
	    addControlButtons();
	} else {
	    removeControlButtons();
	}
    }

    /*
     * Listen for filechooser property changes, such as
     * the selected file changing, or the type of the dialog changing.
     */
    public PropertyChangeListener createPropertyChangeListener(JFileChooser fc) {
	return new PropertyChangeListener() {
	    public void propertyChange(PropertyChangeEvent e) {
		String s = e.getPropertyName();
		if(s.equals(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)) {
		    doSelectedFileChanged(e);
		} else if (s.equals(JFileChooser.SELECTED_FILES_CHANGED_PROPERTY)) {
		    doSelectedFilesChanged(e);
		} else if(s.equals(JFileChooser.DIRECTORY_CHANGED_PROPERTY)) {
		    doDirectoryChanged(e);
		} else if(s.equals(JFileChooser.FILE_FILTER_CHANGED_PROPERTY)) {
		    doFilterChanged(e);
		} else if(s.equals(JFileChooser.FILE_SELECTION_MODE_CHANGED_PROPERTY)) {
		    doFileSelectionModeChanged(e);
		} else if(s.equals(JFileChooser.ACCESSORY_CHANGED_PROPERTY)) {
		    doAccessoryChanged(e);
		} else if (s.equals(JFileChooser.APPROVE_BUTTON_TEXT_CHANGED_PROPERTY) ||
			   s.equals(JFileChooser.APPROVE_BUTTON_TOOL_TIP_TEXT_CHANGED_PROPERTY)) { 
		    doApproveButtonTextChanged(e);
		} else if(s.equals(JFileChooser.DIALOG_TYPE_CHANGED_PROPERTY)) {
		    doDialogTypeChanged(e);
		} else if(s.equals(JFileChooser.APPROVE_BUTTON_MNEMONIC_CHANGED_PROPERTY)) {
		    doApproveButtonMnemonicChanged(e);
		} else if(s.equals(JFileChooser.CONTROL_BUTTONS_ARE_SHOWN_CHANGED_PROPERTY)) {
		    doControlButtonsChanged(e);
		} else if (s.equals("componentOrientation")) {
		    ComponentOrientation o = (ComponentOrientation)e.getNewValue();
		    JFileChooser cc = (JFileChooser)e.getSource();
		    if (o != (ComponentOrientation)e.getOldValue()) {
			cc.applyComponentOrientation(o);
		    }
		} else if (s == "FileChooser.useShellFolder") {
		    updateUseShellFolder();
		    doDirectoryChanged(e);
		} else if (s.equals("ancestor")) {
		    if (e.getOldValue() == null && e.getNewValue() != null) {
			// Ancestor was added, set initial focus
			fileNameTextField.selectAll();
			fileNameTextField.requestFocus();
		    }
		}
	    }
	};
    }


    protected void removeControlButtons() {
	getBottomPanel().remove(getButtonPanel());
    }

    protected void addControlButtons() {
	getBottomPanel().add(getButtonPanel());
    }

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

    public void rescanCurrentDirectory(JFileChooser fc) {
	filePane.rescanCurrentDirectory();
    }

    public String getFileName() {
	if (fileNameTextField != null) {
	    return fileNameTextField.getText();
	} else {
	    return null;
	}
    }

    public void setFileName(String filename) {
	if (fileNameTextField != null) {
	    fileNameTextField.setText(filename);
	}
    }

    /**
     * Property to remember whether a directory is currently selected in the UI.
     * This is normally called by the UI on a selection event.
     *
     * @param directorySelected if a directory is currently selected.
     * @since 1.4
     */
    protected void setDirectorySelected(boolean directorySelected) {
	super.setDirectorySelected(directorySelected);
	JFileChooser chooser = getFileChooser();
	if(directorySelected) {
            if (approveButton != null) {
	        approveButton.setText(directoryOpenButtonText);
	        approveButton.setToolTipText(directoryOpenButtonToolTipText);
            }
	} else {
            if (approveButton != null) {
                approveButton.setText(getApproveButtonText(chooser));
                approveButton.setToolTipText(getApproveButtonToolTipText(chooser));
            }
	}
    }

    public String getDirectoryName() {
	// PENDING(jeff) - get the name from the directory combobox
	return null;
    }

    public void setDirectoryName(String dirname) {
	// PENDING(jeff) - set the name in the directory combobox
    }

    protected DirectoryComboBoxRenderer createDirectoryComboBoxRenderer(JFileChooser fc) {
	return new DirectoryComboBoxRenderer();
    }

    //
    // Renderer for DirectoryComboBox
    //
    class DirectoryComboBoxRenderer extends DefaultListCellRenderer  {
	IndentIcon ii = new IndentIcon();
	public Component getListCellRendererComponent(JList list, Object value,
						      int index, boolean isSelected,
						      boolean cellHasFocus) {

	    super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);

	    if (value == null) {
		setText("");
		return this;
	    }
	    File directory = (File)value;
	    setText(getFileChooser().getName(directory));
	    Icon icon = getFileChooser().getIcon(directory);
	    ii.icon = icon;
	    ii.depth = directoryComboBoxModel.getDepth(index);
	    setIcon(ii);

	    return this;
	}
    }

    final static int space = 10;
    class IndentIcon implements Icon {

	Icon icon = null;
	int depth = 0;

	public void paintIcon(Component c, Graphics g, int x, int y) {
	    if (c.getComponentOrientation().isLeftToRight()) {
		icon.paintIcon(c, g, x+depth*space, y);
	    } else {
		icon.paintIcon(c, g, x, y);
	    }
	}

	public int getIconWidth() {
	    return icon.getIconWidth() + depth*space;
	}

	public int getIconHeight() {
	    return icon.getIconHeight();
	}

    }

    //
    // DataModel for DirectoryComboxbox
    //
    protected DirectoryComboBoxModel createDirectoryComboBoxModel(JFileChooser fc) {
	return new DirectoryComboBoxModel();
    }

    /**
     * Data model for a type-face selection combo-box.
     */
    protected class DirectoryComboBoxModel extends AbstractListModel implements ComboBoxModel {
	Vector directories = new Vector();
	int[] depths = null;
	File selectedDirectory = null;
	JFileChooser chooser = getFileChooser();
	FileSystemView fsv = chooser.getFileSystemView();

	public DirectoryComboBoxModel() {
	    // Add the current directory to the model, and make it the
	    // selectedDirectory
	    File dir = getFileChooser().getCurrentDirectory();
	    if(dir != null) {
		addItem(dir);
	    }
	}

	/**
	 * Adds the directory to the model and sets it to be selected,
	 * additionally clears out the previous selected directory and
	 * the paths leading up to it, if any.
	 */
	private void addItem(File directory) {

	    if(directory == null) {
		return;
	    }

	    directories.clear();

	    File[] baseFolders;
	    if (useShellFolder) {
		baseFolders = (File[])ShellFolder.get("fileChooserComboBoxFolders");
	    } else {
		baseFolders = fsv.getRoots();
	    }
	    directories.addAll(Arrays.asList(baseFolders));

	    // Get the canonical (full) path. This has the side
	    // benefit of removing extraneous chars from the path,
	    // for example /foo/bar/ becomes /foo/bar
	    File canonical = null;
	    try {
		canonical = ShellFolder.getNormalizedFile(directory);
	    } catch (IOException e) {
		// Maybe drive is not ready. Can't abort here.
		canonical = directory;
	    }

	    // create File instances of each directory leading up to the top
	    try {
		File sf = useShellFolder ? ShellFolder.getShellFolder(canonical)
					 : canonical;
		File f = sf;
		Vector path = new Vector(10);
		do {
		    path.addElement(f);
		} while ((f = f.getParentFile()) != null);

		int pathCount = path.size();
		// Insert chain at appropriate place in vector
		for (int i = 0; i < pathCount; i++) {
		    f = (File)path.get(i);
		    if (directories.contains(f)) {
			int topIndex = directories.indexOf(f);
			for (int j = i-1; j >= 0; j--) {
			    directories.insertElementAt(path.get(j), topIndex+i-j);
			}
			break;
		    }
		}
		calculateDepths();
		setSelectedItem(sf);
	    } catch (FileNotFoundException ex) {
		calculateDepths();
	    }
	}

	private void calculateDepths() {
	    depths = new int[directories.size()];
	    for (int i = 0; i < depths.length; i++) {
		File dir = (File)directories.get(i);
		File parent = dir.getParentFile();
		depths[i] = 0;
		if (parent != null) {
		    for (int j = i-1; j >= 0; j--) {
			if (parent.equals((File)directories.get(j))) {
			    depths[i] = depths[j] + 1;
			    break;
			}
		    }
		}
	    }
	}

	public int getDepth(int i) {
	    return (depths != null && i >= 0 && i < depths.length) ? depths[i] : 0;
	}

	public void setSelectedItem(Object selectedDirectory) {
	    this.selectedDirectory = (File)selectedDirectory;
            fireContentsChanged(this, -1, -1);
	}

	public Object getSelectedItem() {
	    return selectedDirectory;
	}

	public int getSize() {
	    return directories.size();
	}

	public Object getElementAt(int index) {
	    return directories.elementAt(index);
	}
    }

    //
    // Renderer for Types ComboBox
    //
    protected FilterComboBoxRenderer createFilterComboBoxRenderer() {
	return new FilterComboBoxRenderer();
    }

    /**
     * Render different type sizes and styles.
     */
    public class FilterComboBoxRenderer extends DefaultListCellRenderer {
	public Component getListCellRendererComponent(JList list,
	    Object value, int index, boolean isSelected,
	    boolean cellHasFocus) {

	    super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);

	    if (value != null && value instanceof FileFilter) {
		setText(((FileFilter)value).getDescription());
	    }

	    return this;
	}
    }

    //
    // DataModel for Types Comboxbox
    //
    protected FilterComboBoxModel createFilterComboBoxModel() {
	return new FilterComboBoxModel();
    }

    /**
     * Data model for a type-face selection combo-box.
     */
    protected class FilterComboBoxModel extends AbstractListModel implements ComboBoxModel, PropertyChangeListener {
	protected FileFilter[] filters;
	protected FilterComboBoxModel() {
	    super();
	    filters = getFileChooser().getChoosableFileFilters();
	}

	public void propertyChange(PropertyChangeEvent e) {
	    String prop = e.getPropertyName();
	    if(prop == JFileChooser.CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY) {
		filters = (FileFilter[]) e.getNewValue();
		fireContentsChanged(this, -1, -1);
	    } else if (prop == JFileChooser.FILE_FILTER_CHANGED_PROPERTY) {
		fireContentsChanged(this, -1, -1);
	    }
	}

	public void setSelectedItem(Object filter) {
	    if(filter != null) {
		getFileChooser().setFileFilter((FileFilter) filter);
		fireContentsChanged(this, -1, -1);
	    }
	}

	public Object getSelectedItem() {
	    // Ensure that the current filter is in the list.
	    // NOTE: we shouldnt' have to do this, since JFileChooser adds
	    // the filter to the choosable filters list when the filter
	    // is set. Lets be paranoid just in case someone overrides
	    // setFileFilter in JFileChooser.
	    FileFilter currentFilter = getFileChooser().getFileFilter();
	    boolean found = false;
	    if(currentFilter != null) {
		for(int i=0; i < filters.length; i++) {
		    if(filters[i] == currentFilter) {
			found = true;
		    }
		}
		if(found == false) {
		    getFileChooser().addChoosableFileFilter(currentFilter);
		}
	    }
	    return getFileChooser().getFileFilter();
	}

	public int getSize() {
	    if(filters != null) {
		return filters.length;
	    } else {
		return 0;
	    }
	}

	public Object getElementAt(int index) {
	    if(index > getSize() - 1) {
		// This shouldn't happen. Try to recover gracefully.
		return getFileChooser().getFileFilter();
	    }
	    if(filters != null) {
		return filters[index];
	    } else {
		return null;
	    }
	}
    }

    public void valueChanged(ListSelectionEvent e) {
	JFileChooser fc = getFileChooser();
	File f = fc.getSelectedFile();
	if (!e.getValueIsAdjusting() && f != null && !getFileChooser().isTraversable(f)) {
	    setFileName(fileNameString(f));
	}
    }

    /**
     * Acts when DirectoryComboBox has changed the selected item.
     */
    protected class DirectoryComboBoxAction extends AbstractAction {
	protected DirectoryComboBoxAction() {
	    super("DirectoryComboBoxAction");
	}

	public void actionPerformed(ActionEvent e) {
            directoryComboBox.hidePopup();
	    File f = (File)directoryComboBox.getSelectedItem();
            if (!getFileChooser().getCurrentDirectory().equals(f)) {
	        getFileChooser().setCurrentDirectory(f);
            }
	}
    }

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


    /**
     * <code>ButtonAreaLayout</code> behaves in a similar manner to
     * <code>FlowLayout</code>. It lays out all components from left to
     * right, flushed right. The widths of all components will be set
     * to the largest preferred size width.
     */  
    private static class ButtonAreaLayout implements LayoutManager {
	private int hGap = 5;
	private int topMargin = 17;

	public void addLayoutComponent(String string, Component comp) {
	}

	public void layoutContainer(Container container) {
	    Component[] children = container.getComponents();

	    if (children != null && children.length > 0) {
		int         numChildren = children.length;
		Dimension[] sizes = new Dimension[numChildren];
		Insets      insets = container.getInsets();
		int         yLocation = insets.top + topMargin;
		int         maxWidth = 0;

		for (int counter = 0; counter < numChildren; counter++) {
		    sizes[counter] = children[counter].getPreferredSize();
		    maxWidth = Math.max(maxWidth, sizes[counter].width);
		}
		int xLocation, xOffset;
		if (container.getComponentOrientation().isLeftToRight()) {
		    xLocation = container.getSize().width - insets.left - maxWidth;
		    xOffset = hGap + maxWidth;
		} else {
		    xLocation = insets.left;
		    xOffset = -(hGap + maxWidth);
		}
		for (int counter = numChildren - 1; counter >= 0; counter--) {
		    children[counter].setBounds(xLocation, yLocation,
						maxWidth, sizes[counter].height);
		    xLocation -= xOffset;
		}
	    }
	}

	public Dimension minimumLayoutSize(Container c) {
	    if (c != null) {
		Component[] children = c.getComponents();

		if (children != null && children.length > 0) {
		    int       numChildren = children.length;
		    int       height = 0;
		    Insets    cInsets = c.getInsets();
		    int       extraHeight = topMargin + cInsets.top + cInsets.bottom;
		    int       extraWidth = cInsets.left + cInsets.right;
		    int       maxWidth = 0;

		    for (int counter = 0; counter < numChildren; counter++) {
			Dimension aSize = children[counter].getPreferredSize();
			height = Math.max(height, aSize.height);
			maxWidth = Math.max(maxWidth, aSize.width);
		    }
		    return new Dimension(extraWidth + numChildren * maxWidth + 
					 (numChildren - 1) * hGap,
					 extraHeight + height);
		}
	    }
	    return new Dimension(0, 0);
	}

	public Dimension preferredLayoutSize(Container c) {
	    return minimumLayoutSize(c);
	}

	public void removeLayoutComponent(Component c) { }
    }

    private static void groupLabels(AlignedLabel[] group) {
	for (int i = 0; i < group.length; i++) {
	    group[i].group = group;
	}
    }

    private class AlignedLabel extends JLabel {
	private AlignedLabel[] group;
	private int maxWidth = 0;

	AlignedLabel(String text) {
	    super(text);
	    setAlignmentX(JComponent.LEFT_ALIGNMENT);
	}

	public Dimension getPreferredSize() {
	    Dimension d = super.getPreferredSize();
	    // Align the width with all other labels in group.
	    return new Dimension(getMaxWidth() + 11, d.height);
	}

	private int getMaxWidth() {
	    if (maxWidth == 0 && group != null) {
		int max = 0;
		for (int i = 0; i < group.length; i++) {
		    max = Math.max(group[i].getSuperPreferredWidth(), max);
		}
		for (int i = 0; i < group.length; i++) {
		    group[i].maxWidth = max;
		}
	    }
	    return maxWidth;
	}

	private int getSuperPreferredWidth() {
	    return super.getPreferredSize().width;
	}
    }
}