/*
 * @(#)BasicFileChooserUI.java	1.47 03/01/23
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.swing.plaf.basic;

import javax.swing.*;
import javax.swing.filechooser.*;
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.File;
import java.io.IOException;
import java.util.*;
import java.util.regex.*;

/**
 * Basic L&F implementation of a FileChooser.
 *
 * @version %i% %g%
 * @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 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 not DIRECTORIES_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 not DIRECTORIES_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 not DIRECTORIES_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 = new NewFolderAction();
    private Action goHomeAction = new GoHomeAction();
    private Action changeToParentDirectoryAction = new ChangeToParentDirectoryAction();

    private String newFolderErrorSeparator = null;
    private String newFolderErrorText = 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();

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


    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((JFileChooser) filechooser);
	uninstallComponents((JFileChooser) filechooser);
	uninstallDefaults((JFileChooser) filechooser);

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

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

    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)UIManager.get("FileChooser.ancestorInputMap");
	}
	return null;
    }

    ActionMap getActionMap() {
	return createActionMap();
    }

    ActionMap createActionMap() {
	AbstractAction escAction = new AbstractAction() {
            public void actionPerformed(ActionEvent e) {
		getFileChooser().cancelSelection();
            }
            public boolean isEnabled(){
                return getFileChooser().isEnabled();
            }
        };
	ActionMap map = new ActionMapUIResource();
        map.put("approveSelection", getApproveSelectionAction());
	map.put("cancelSelection", escAction);
        map.put("Go Up", 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);
	TransferHandler th = fc.getTransferHandler();
	if (th == null || th instanceof UIResource) {
	    fc.setTransferHandler(defaultTransferHandler);
	}
    }

    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");
    }

    protected void installStrings(JFileChooser fc) {

        Locale l = fc.getLocale();
	newFolderErrorText = UIManager.getString("FileChooser.newFolderErrorText",l);
	newFolderErrorSeparator = UIManager.getString("FileChooser.newFolderErrorSeparator",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   = UIManager.getInt("FileChooser.saveButtonMnemonic");
	openButtonMnemonic   = UIManager.getInt("FileChooser.openButtonMnemonic");
	cancelButtonMnemonic = UIManager.getInt("FileChooser.cancelButtonMnemonic");
	updateButtonMnemonic = UIManager.getInt("FileChooser.updateButtonMnemonic");
	helpButtonMnemonic   = UIManager.getInt("FileChooser.helpButtonMnemonic");
	directoryOpenButtonMnemonic = UIManager.getInt("FileChooser.directoryOpenButtonMnemonic");

	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;
    }

    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() {
	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 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 **************
    // ********************************************

    public ListSelectionListener createListSelectionListener(JFileChooser fc) {
	return new SelectionListener();
    }

    protected class DoubleClickListener extends MouseAdapter {
	JList list;
	public  DoubleClickListener(JList list) {
	    this.list = 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) {
	    TransferHandler th1 = filechooser.getTransferHandler();
	    TransferHandler th2 = list.getTransferHandler();
	    if (th1 != th2) {
		list.setTransferHandler(th1);
	    }
	    if (filechooser.getDragEnabled() != list.getDragEnabled()) {
		list.setDragEnabled(filechooser.getDragEnabled());
	    }
	}

	public void mouseClicked(MouseEvent e) {
	    if (SwingUtilities.isLeftMouseButton(e) && e.getClickCount() == 2) {
		int index = list.locationToIndex(e.getPoint());
		if(index >= 0) {
		    File f = (File) list.getModel().getElementAt(index);
		    try {
			// Strip trailing ".."
			f = f.getCanonicalFile();
		    } catch (IOException ex) {
			// That's ok, we'll use f as is
		    }
		    if(getFileChooser().isTraversable(f)) {
			list.clearSelection();
			getFileChooser().setCurrentDirectory(f);
		    } else {
			getFileChooser().approveSelection();
		    }
		}
	    }
	}
    }

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

    /**
     * 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;
    }

    protected class SelectionListener implements ListSelectionListener {
	public void valueChanged(ListSelectionEvent e) {
	    if(!e.getValueIsAdjusting()) {
		JFileChooser chooser = getFileChooser();
		JList list = (JList) e.getSource();

		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]))
			    && (chooser.getFileSelectionMode() != chooser.DIRECTORIES_ONLY
				|| !chooser.getFileSystemView().isFileSystem(((File)objects[0])))) {
			    setDirectorySelected(true);
			    setDirectory(((File)objects[0]));
			} else {
			    ArrayList fList = new ArrayList(objects.length);
			    for (int i = 0; i < objects.length; i++) {
				File f = (File)objects[i];
				if ((chooser.isFileSelectionEnabled() && f.isFile())
				    || (chooser.isDirectorySelectionEnabled() && f.isDirectory())) {
				    fList.add(f);
				}
			    }
			    if (fList.size() > 0) {
				files = (File[])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)
			&& (chooser.getFileSelectionMode() != chooser.DIRECTORIES_ONLY
			    || !chooser.getFileSystemView().isFileSystem(file))) {

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


    // *******************************************************
    // ************ 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() {
	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("New Folder");
	}
	public void actionPerformed(ActionEvent e) {
	    JFileChooser fc = getFileChooser();
	    File currentDirectory = fc.getCurrentDirectory();
	    File newFolder = null;
	    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();
	    fc.setCurrentDirectory(fc.getFileSystemView().getHomeDirectory());
	}
    }

    protected class ChangeToParentDirectoryAction extends AbstractAction {
	protected ChangeToParentDirectoryAction() {
	    super("Go Up");
	}
	public void actionPerformed(ActionEvent e) {
	    Component focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
	    if (focusOwner == null || !(focusOwner instanceof javax.swing.text.JTextComponent)) {
		getFileChooser().changeToParentDirectory();
	    }
	}
    }

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

	    JFileChooser chooser = getFileChooser();

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

	    if (filename != null) {
		// Remove whitespace from beginning and end of filename
		filename = filename.trim();
	    }

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

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

	    if (filename != null && !filename.equals("")) {
		// 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.startsWith("\"")) {
		    ArrayList fList = new ArrayList();

		    filename = filename.substring(1);
		    if (filename.endsWith("\"")) {
			filename = filename.substring(0, filename.length()-1);
		    }
		    File[] children = null;
		    int childIndex = 0;
		    do {
			String str;
			int i = filename.indexOf("\" \"");
			if (i > 0) {
			    str = filename.substring(0, i);
			    filename = filename.substring(i+3);
			} else {
			    str = filename;
			    filename = "";
			}
			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);
		    } while (filename.length() > 0);
		    if (fList.size() > 0) {
			selectedFiles = (File[])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)) {
			if (globFilter == null) {
			    globFilter = new GlobFilter();
			}
			try {
			    globFilter.setPattern(filename);
			    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();

		    if (isDir && isTrav && !isDirSelEnabled) {
			chooser.setCurrentDirectory(selectedFile);
			return;
		    } else if ((isDir || !isFileSelEnabled)
			       && (!isDir || !isDirSelEnabled)
			       && (!isDirSelEnabled || selectedFile.exists())) {
			selectedFile = null;
		    }
		}
	    }
	    if (selectedFiles != null || selectedFile != null) {
		if (selectedFiles != null) {
		    chooser.setSelectedFiles(selectedFiles);
		} else if (chooser.isMultiSelectionEnabled()) {
		    chooser.setSelectedFiles(new File[] { selectedFile });
		} 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)
		|| (File.separatorChar == '/' && (filename.indexOf('*') >= 0
						  || filename.indexOf('?') >= 0
						  || filename.indexOf('[') >= 0)));
    }

    
    /* A file filter which accepts file patterns containing
     * the special wildcard '*' on windows, plus '?', 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;
	    StringBuffer buf = new StringBuffer();
	    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++] = '\\';
			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();
	}
    }


    // *****************************************
    // ***** 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",
                                       getFileChooser().getLocale());
	}
    }


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

	public BasicFileView() {
	}

	public void clearIconCache() {
	    iconCache = new Hashtable();
	}

	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 (Icon) 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 (int i = 0; i < values.length; i++) {
                Object obj = values[i];
                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 files = new ArrayList();
		    for (int i = 0; i < fileData.length; i++) {
			files.add(fileData[i]);
		    }
		    return files;
		}
		return null;
	    }

	}
    }

}