/*
 * Copyright (c) 2003, 2018, 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 sun.awt.X11;

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.peer.*;
import java.io.*;
import java.util.Locale;
import java.util.Arrays;
import java.security.AccessController;
import java.security.PrivilegedAction;

import sun.awt.AWTAccessor.ComponentAccessor;
import sun.util.logging.PlatformLogger;
import sun.awt.AWTAccessor;

class XFileDialogPeer extends XDialogPeer
        implements FileDialogPeer, ActionListener, ItemListener,
                   KeyEventDispatcher, XChoicePeerListener {

    private static final PlatformLogger log =
            PlatformLogger.getLogger("sun.awt.X11.XFileDialogPeer");

    FileDialog  target;

    // This variable holds value exactly the same as value of the 'target.file' variable except:
    // 1) is changed to null after quit (see handleQuitButton())
    // 2) keep the same value if 'target.file' is incorrect (see setFile())
    // It's not clear HOW we used it
    // We should think about existence of this variable
    String      file;

    String      dir;

    String      title;
    int         mode;
    FilenameFilter  filter;

    private static final int PATH_CHOICE_WIDTH = 20;

    // Seems that the purpose of this variable is cashing of 'target.file' variable in order to help method show()
    // We should think about using 'target.file' instead of 'savedFile'
    // Perhaps, 'target.file' just more correct (see target.setFile())
    String      savedFile;

    // Holds value of the directory which was chosen before
    // We use it in order to restore previously selected directory
    // at the time of the next showing of the file dialog
    String      savedDir;
    // Holds value of the system property 'user.dir'
    // in order to init current directory
    String      userDir;

    Dialog      fileDialog;

    GridBagLayout       gbl;
    GridBagLayout       gblButtons;
    GridBagConstraints  gbc;

    // ************** Components in the fileDialogWindow ***************

    TextField   filterField;

    // This variable holds the current text of the file which user select through the navigation
    // It's important that updating of this variable must be correct
    // since this value is used at the time of the file dialog closing
    // Namely, we invoke target.setFile() and then user can get this value
    // We update this field in cases:
    // - ITEM_STATE_CHANGED was triggered on the file list component: set to the current selected item
    // - at the time of the 'show': set to savedFile
    // - at the time of the programmatically setting: set to new value
    TextField   selectionField;

    List        directoryList;

    // This is the list component which is used for the showing of the file list of the current directory
    List        fileList;

    Panel       buttons;
    Button      openButton;
    Button      filterButton;
    Button      cancelButton;
    Choice      pathChoice;
    TextField   pathField;
    Panel       pathPanel;

    String cancelButtonText = null;
    String enterFileNameLabelText = null;
    String filesLabelText= null;
    String foldersLabelText= null;
    String pathLabelText= null;
    String filterLabelText= null;
    String openButtonText= null;
    String saveButtonText= null;
    String actionButtonText= null;


    void installStrings() {
        Locale l = target.getLocale();
        UIDefaults uid = XToolkit.getUIDefaults();
        cancelButtonText = uid.getString("FileChooser.cancelButtonText",l);
        enterFileNameLabelText = uid.getString("FileChooser.enterFileNameLabelText",l);
        filesLabelText = uid.getString("FileChooser.filesLabelText",l);
        foldersLabelText = uid.getString("FileChooser.foldersLabelText",l);
        pathLabelText = uid.getString("FileChooser.pathLabelText",l);
        filterLabelText = uid.getString("FileChooser.filterLabelText",l);
        openButtonText = uid.getString("FileChooser.openButtonText",l);
        saveButtonText  = uid.getString("FileChooser.saveButtonText",l);

    }

    XFileDialogPeer(FileDialog target) {
        super((Dialog)target);
        this.target = target;
    }

    @SuppressWarnings("deprecation")
    private void init(FileDialog target) {
        fileDialog = target; //new Dialog(target, target.getTitle(), false);
        this.title = target.getTitle();
        this.mode = target.getMode();
        this.target = target;
        this.filter = target.getFilenameFilter();

        savedFile = target.getFile();
        savedDir = target.getDirectory();
        // Shouldn't save 'user.dir' to 'savedDir'
        // since getDirectory() will be incorrect after handleCancel
        userDir = AccessController.doPrivileged(
            new PrivilegedAction<String>() {
                public String run() {
                    return System.getProperty("user.dir");
                }
            });

        installStrings();
        gbl = new GridBagLayout();
        gblButtons = new GridBagLayout();
        gbc = new GridBagConstraints();
        fileDialog.setLayout(gbl);

        // create components
        buttons = new Panel();
        buttons.setLayout(gblButtons);
        actionButtonText = (target.getMode() == FileDialog.SAVE) ? saveButtonText : openButtonText;
        openButton = new Button(actionButtonText);

        filterButton = new Button(filterLabelText);
        cancelButton = new Button(cancelButtonText);
        directoryList = new List();
        fileList = new List();
        filterField = new TextField();
        selectionField = new TextField();

        boolean isMultipleMode =
            AWTAccessor.getFileDialogAccessor().isMultipleMode(target);
        fileList.setMultipleMode(isMultipleMode);

        // the insets used by the components in the fileDialog
        Insets noInset = new Insets(0, 0, 0, 0);
        Insets textFieldInset = new Insets(0, 8, 0, 8);
        Insets leftListInset = new Insets(0, 8, 0, 4);
        Insets rightListInset = new Insets(0, 4, 0, 8);
        Insets separatorInset = new Insets(8, 0, 0, 0);
        Insets labelInset = new Insets(0, 8, 0, 0);
        Insets buttonsInset = new Insets(10, 8, 10, 8);

        // add components to GridBagLayout "gbl"

        Font f = new Font(Font.DIALOG, Font.PLAIN, 12);

        Label label = new Label(pathLabelText);
        label.setFont(f);
        addComponent(label, gbl, gbc, 0, 0, 1,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.NONE, labelInset);

        // Fixed 6260650: FileDialog.getDirectory() does not return null when file dialog is cancelled
        // After showing we should display 'user.dir' as current directory
        // if user didn't set directory programatically
        pathField = new TextField(savedDir != null ? savedDir : userDir);
        @SuppressWarnings("serial") // Anonymous class
        Choice tmp = new Choice() {
                public Dimension getPreferredSize() {
                    return new Dimension(PATH_CHOICE_WIDTH, pathField.getPreferredSize().height);
                }
            };
        pathChoice = tmp;
        pathPanel = new Panel();
        pathPanel.setLayout(new BorderLayout());

        pathPanel.add(pathField,BorderLayout.CENTER);
        pathPanel.add(pathChoice,BorderLayout.EAST);
        //addComponent(pathField, gbl, gbc, 0, 1, 2,
        //             GridBagConstraints.WEST, (Container)fileDialog,
        //             1, 0, GridBagConstraints.HORIZONTAL, textFieldInset);
        //addComponent(pathChoice, gbl, gbc, 1, 1, GridBagConstraints.RELATIVE,
         //            GridBagConstraints.WEST, (Container)fileDialog,
          //           1, 0, GridBagConstraints.HORIZONTAL, textFieldInset);
        addComponent(pathPanel, gbl, gbc, 0, 1, 2,
                    GridBagConstraints.WEST, (Container)fileDialog,
                   1, 0, GridBagConstraints.HORIZONTAL, textFieldInset);



        label = new Label(filterLabelText);

        label.setFont(f);
        addComponent(label, gbl, gbc, 0, 2, 1,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.NONE, labelInset);
        addComponent(filterField, gbl, gbc, 0, 3, 2,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.HORIZONTAL, textFieldInset);

        label = new Label(foldersLabelText);

        label.setFont(f);
        addComponent(label, gbl, gbc, 0, 4, 1,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.NONE, labelInset);

        label = new Label(filesLabelText);

        label.setFont(f);
        addComponent(label, gbl, gbc, 1, 4, 1,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.NONE, labelInset);
        addComponent(directoryList, gbl, gbc, 0, 5, 1,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 1, GridBagConstraints.BOTH, leftListInset);
        addComponent(fileList, gbl, gbc, 1, 5, 1,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 1, GridBagConstraints.BOTH, rightListInset);

        label = new Label(enterFileNameLabelText);

        label.setFont(f);
        addComponent(label, gbl, gbc, 0, 6, 1,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.NONE, labelInset);
        addComponent(selectionField, gbl, gbc, 0, 7, 2,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.HORIZONTAL, textFieldInset);
        addComponent(new Separator(fileDialog.size().width, 2, Separator.HORIZONTAL), gbl, gbc, 0, 8, 15,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.HORIZONTAL, separatorInset);

        // add buttons to GridBagLayout Buttons
        addComponent(openButton, gblButtons, gbc, 0, 0, 1,
                     GridBagConstraints.WEST, (Container)buttons,
                     1, 0, GridBagConstraints.NONE, noInset);
        addComponent(filterButton, gblButtons, gbc, 1, 0, 1,
                     GridBagConstraints.CENTER, (Container)buttons,
                     1, 0, GridBagConstraints.NONE, noInset);
        addComponent(cancelButton, gblButtons, gbc, 2, 0, 1,
                     GridBagConstraints.EAST, (Container)buttons,
                     1, 0, GridBagConstraints.NONE, noInset);

        // add ButtonPanel to the GridBagLayout of this class
        addComponent(buttons, gbl, gbc, 0, 9, 2,
                     GridBagConstraints.WEST, (Container)fileDialog,
                     1, 0, GridBagConstraints.HORIZONTAL, buttonsInset);

        fileDialog.setSize(400, 400);

        // Update choice's popup width
        XChoicePeer choicePeer = AWTAccessor.getComponentAccessor()
                                            .getPeer(pathChoice);
        choicePeer.setDrawSelectedItem(false);
        choicePeer.setAlignUnder(pathField);

        filterField.addActionListener(this);
        selectionField.addActionListener(this);
        directoryList.addActionListener(this);
        directoryList.addItemListener(this);
        fileList.addItemListener(this);
        fileList.addActionListener(this);
        openButton.addActionListener(this);
        filterButton.addActionListener(this);
        cancelButton.addActionListener(this);
        pathChoice.addItemListener(this);
        pathField.addActionListener(this);

        // b6227750 FileDialog is not disposed when clicking the 'close' (X) button on the top right corner, XToolkit
        target.addWindowListener(
            new WindowAdapter(){
                public void windowClosing(WindowEvent e){
                    handleCancel();
                }
            }
        );

        // 6259434 PIT: Choice in FileDialog is not responding to keyboard interactions, XToolkit
        pathChoice.addItemListener(this);

    }

    public void updateMinimumSize() {
    }

    public void updateIconImages() {
        if (winAttr.icons == null){
            winAttr.iconsInherited = false;
            winAttr.icons = getDefaultIconInfo();
            setIconHints(winAttr.icons);
        }
    }

    
add Component comp to the container cont.
add the component to the correct GridBagLayout
/**
     * add Component comp to the container cont.
     * add the component to the correct GridBagLayout
     */
    void addComponent(Component comp, GridBagLayout gb, GridBagConstraints c, int gridx,
                      int gridy, int gridwidth, int anchor, Container cont, int weightx, int weighty,
                      int fill, Insets in) {
        c.gridx = gridx;
        c.gridy = gridy;
        c.gridwidth = gridwidth;
        c.anchor = anchor;
        c.weightx = weightx;
        c.weighty = weighty;
        c.fill = fill;
        c.insets = in;
        gb.setConstraints(comp, c);
        cont.add(comp);
    }

    
get fileName
/**
     * get fileName
     */
    String getFileName(String str) {
        if (str == null) {
            return "";
        }

        int index = str.lastIndexOf('/');

        if (index == -1) {
            return str;
        } else {
            return str.substring(index + 1);
        }
    }

    
handleFilter
/** handleFilter
     *
     */
    void handleFilter(String f) {

        if (f == null) {
            return;
        }
        setFilterEntry(dir,f);

        // Fixed within 6259434: PIT: Choice in FileDialog is not responding to keyboard interactions, XToolkit
        // Here we restoring Motif behaviour
        directoryList.select(0);
        if (fileList.getItemCount() != 0) {
            fileList.requestFocus();
        } else {
            directoryList.requestFocus();
        }
    }

    
handle the selection event
/**
     * handle the selection event
     */
    void handleSelection(String file) {

        int index = file.lastIndexOf(java.io.File.separatorChar);

        if (index == -1) {
            savedDir = this.dir;
            savedFile = file;
        } else {
            savedDir = file.substring(0, index+1);
            savedFile = file.substring(index+1);
        }

        String[] fileNames = fileList.getSelectedItems();
        int filesNumber = (fileNames != null) ? fileNames.length : 0;
        File[] files = new File[filesNumber];
        for (int i = 0; i < filesNumber; i++) {
            files[i] = new File(savedDir, fileNames[i]);
        }

        AWTAccessor.FileDialogAccessor fileDialogAccessor = AWTAccessor.getFileDialogAccessor();

        fileDialogAccessor.setDirectory(target, savedDir);
        fileDialogAccessor.setFile(target, savedFile);
        fileDialogAccessor.setFiles(target, files);
    }

    
handle the cancel event
/**
     * handle the cancel event
     */
    @SuppressWarnings("deprecation")
    void handleCancel() {
        KeyboardFocusManager.getCurrentKeyboardFocusManager()
            .removeKeyEventDispatcher(this);

        setSelectionField(null);
        setFilterField(null);
        directoryList.clear();
        fileList.clear();

        AWTAccessor.FileDialogAccessor fileDialogAccessor = AWTAccessor.getFileDialogAccessor();

        fileDialogAccessor.setDirectory(target, null);
        fileDialogAccessor.setFile(target, null);
        fileDialogAccessor.setFiles(target, null);

        handleQuitButton();
    }

    
handle the quit event
/**
     * handle the quit event
     */
    @SuppressWarnings("deprecation")
    void handleQuitButton() {
        dir = null;
        file = null;
        target.hide();
    }

    
set the entry of the new dir with f
/**
     * set the entry of the new dir with f
     */
    @SuppressWarnings("deprecation")
    void setFilterEntry(String d, String f) {
        File fe = new File(d);

        if (fe.isDirectory() && fe.canRead()) {
            // Fixed 6260659: File Name set programmatically in FileDialog is overridden during navigation, XToolkit
            // Here we restoring Motif behaviour
            setSelectionField(target.getFile());

            if (f.equals("")) {
                f = "*";
                setFilterField(f);
            } else {
                setFilterField(f);
            }
            String[] l;

            if (f.equals("*")) {
                l = fe.list();
            } else {
                // REMIND: fileDialogFilter is not implemented yet
                FileDialogFilter ff = new FileDialogFilter(f);
                l = fe.list(ff);
            }
            // Fixed 6358953: handling was added in case of I/O error happens
            if (l == null) {
                this.dir = getParentDirectory();
                return;
            }
            directoryList.clear();
            fileList.clear();
            directoryList.setVisible(false);
            fileList.setVisible(false);

            directoryList.addItem("..");
            Arrays.sort(l);
            for (int i = 0 ; i < l.length ; i++) {
                File file = new File(d + l[i]);
                if (file.isDirectory()) {
                    directoryList.addItem(l[i] + "/");
                } else {
                    if (filter != null) {
                        if (filter.accept(new File(l[i]),l[i]))  fileList.addItem(l[i]);
                    }
                    else fileList.addItem(l[i]);
                }
            }
            this.dir = d;

            pathField.setText(dir);

            // Some code was removed
            // Now we do updating of the pathChoice at the time of the choice opening

            target.setDirectory(this.dir);
            directoryList.setVisible(true);
            fileList.setVisible(true);
        }
    }


    String[] getDirList(String dir) {
        if (!dir.endsWith("/"))
            dir = dir + "/";
        char[] charr = dir.toCharArray();
        int numSlashes = 0;
        for (int i=0;i<charr.length;i++) {
           if (charr[i] == '/')
               numSlashes++;
        }
        String[] starr =  new String[numSlashes];
        int j=0;
        for (int i=charr.length-1;i>=0;i--) {
            if (charr[i] == '/')
            {
                starr[j++] = new String(charr,0,i+1);
            }
        }
        return starr;
    }

    
set the text in the selectionField
/**
     * set the text in the selectionField
     */
    void setSelectionField(String str) {
        selectionField.setText(str);
    }

    
set the text in the filterField
/**
     * set the text in the filterField
     */
    void setFilterField(String str) {
        filterField.setText(str);
    }

    
See Also:

ItemEvent.ITEM_STATE_CHANGED/**
     *
     * @see java.awt.event.ItemEvent
     * ItemEvent.ITEM_STATE_CHANGED
     */
    public void itemStateChanged(ItemEvent itemEvent){
        if (itemEvent.getID() != ItemEvent.ITEM_STATE_CHANGED ||
            itemEvent.getStateChange() == ItemEvent.DESELECTED) {
            return;
        }

        Object source = itemEvent.getSource();

        if (source == pathChoice) {
            /*
             * Update the selection ('folder name' text field) after
             * the current item changing in the unfurled choice by the arrow keys.
             * See 6259434, 6240074 for more information
             */
            String dir = pathChoice.getSelectedItem();
            pathField.setText(dir);
        } else if (directoryList == source) {
            setFilterField(getFileName(filterField.getText()));
        } else if (fileList == source) {
            String file = fileList.getItem((Integer)itemEvent.getItem());
            setSelectionField(file);
        }
    }

    /*
     * Updates the current directory only if directoryList-specific
     * action occurred. Returns false if the forward directory is inaccessible
     */
    boolean updateDirectoryByUserAction(String str) {

        String dir;
        if (str.equals("..")) {
            dir = getParentDirectory();
        }
        else {
            dir = this.dir + str;
        }

        File fe = new File(dir);
        if (fe.canRead()) {
            this.dir = dir;
            return true;
        }else {
            return false;
        }
    }

    String getParentDirectory(){
        String parent = this.dir;
        if (!this.dir.equals("/"))   // If the current directory is "/" leave it alone.
        {
            if (dir.endsWith("/"))
                parent = parent.substring(0,parent.lastIndexOf("/"));

            parent = parent.substring(0,parent.lastIndexOf("/")+1);
        }
        return parent;
    }

    public void actionPerformed( ActionEvent actionEvent ) {
        String actionCommand = actionEvent.getActionCommand();
        Object source = actionEvent.getSource();

        if (actionCommand.equals(actionButtonText)) {
            handleSelection( selectionField.getText() );
            handleQuitButton();
        } else if (actionCommand.equals(filterLabelText)) {
            handleFilter( filterField.getText() );
        } else if (actionCommand.equals(cancelButtonText)) {
            handleCancel();
        } else if ( source instanceof TextField ) {
            if ( selectionField == ((TextField)source) ) {
                // Fixed within 6259434: PIT: Choice in FileDialog is not responding to keyboard interactions, XToolkit
                // We should handle the action based on the selection field
                // Looks like mistake
                handleSelection(selectionField.getText());
                handleQuitButton();
            } else if (filterField == ((TextField)source)) {
                handleFilter(filterField.getText());
            } else if (pathField == ((TextField)source)) {
                target.setDirectory(pathField.getText());
            }
        } else if (source instanceof List) {
            if (directoryList == ((List)source)) {
                //handleFilter( actionCommand + getFileName( filterField.getText() ) );
                if (updateDirectoryByUserAction(actionCommand)){
                    handleFilter( getFileName( filterField.getText() ) );
                }
            } else if (fileList == ((List)source)) {
                handleSelection( actionCommand );
                handleQuitButton();
            }
        }
    }

    public boolean dispatchKeyEvent(KeyEvent keyEvent) {
        int id = keyEvent.getID();
        int keyCode = keyEvent.getKeyCode();

        if (id == KeyEvent.KEY_PRESSED && keyCode == KeyEvent.VK_ESCAPE) {
            synchronized (target.getTreeLock()) {
                Component comp = (Component) keyEvent.getSource();
                while (comp != null) {
                    // Fix for 6240084 Disposing a file dialog when the drop-down is active does not dispose the dropdown menu, on Xtoolkit
                    // See also 6259493
                    ComponentAccessor acc = AWTAccessor.getComponentAccessor();
                    if (comp == pathChoice) {
                        XChoicePeer choicePeer = acc.getPeer(pathChoice);
                        if (choicePeer.isUnfurled()){
                            return false;
                        }
                    }
                    Object peer = acc.getPeer(comp);
                    if (peer == this) {
                        handleCancel();
                        return true;
                    }
                    comp = comp.getParent();
                }
            }
        }

        return false;
    }


    
set the file
/**
     * set the file
     */
    public void setFile(String file) {

        if (file == null) {
            this.file = null;
            return;
        }

        if (this.dir == null) {
            String d = "./";
            File f = new File(d, file);

            if (f.isFile()) {
                this.file = file;
                setDirectory(d);
            }
        } else {
            File f = new File(this.dir, file);
            if (f.isFile()) {
                this.file = file;
            }
        }

        setSelectionField(file);
    }

    
set the directory
FIXME: we should update 'savedDir' after programmatically 'setDirectory'
Otherwise, SavedDir will be not null before second showing
So the current directory of the file dialog will be incorrect after second showing
since 'setDirectory' will be ignored
We cann't update savedDir here now since it used very often
/**
     * set the directory
     * FIXME: we should update 'savedDir' after programmatically 'setDirectory'
     * Otherwise, SavedDir will be not null before second showing
     * So the current directory of the file dialog will be incorrect after second showing
     * since 'setDirectory' will be ignored
     * We cann't update savedDir here now since it used very often
     */
    public void setDirectory(String dir) {

        if (dir == null) {
            this.dir = null;
            return;
        }

        if (dir.equals(this.dir)) {
            return;
        }

        int i;
        if ((i=dir.indexOf("~")) != -1) {

            dir = dir.substring(0,i) + System.getProperty("user.home") + dir.substring(i+1,dir.length());
        }

        File fe = new File(dir).getAbsoluteFile();
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("Current directory : " + fe);
        }

        if (!fe.isDirectory()) {
            dir = "./";
            fe = new File(dir).getAbsoluteFile();

            if (!fe.isDirectory()) {
                return;
            }
        }
        try {
            dir = this.dir = fe.getCanonicalPath();
        } catch (java.io.IOException ie) {
            dir = this.dir = fe.getAbsolutePath();
        }
        pathField.setText(this.dir);


        if (dir.endsWith("/")) {
            this.dir = dir;
            handleFilter("");
        } else {
            this.dir = dir + "/";
            handleFilter("");
        }

        // Some code was removed
        // Now we do updating of the pathChoice at the time of the choice opening
        // Fixed problem:
        // The exception java.awt.IllegalComponentStateException will be thrown
        // if the user invoke setDirectory after the closing of the file dialog
    }

    
set filenameFilter
/**
     * set filenameFilter
     *
     */
    public void setFilenameFilter(FilenameFilter filter) {
        this.filter = filter;
    }


    public void dispose() {
        FileDialog fd = (FileDialog)fileDialog;
        if (fd != null) {
            fd.removeAll();
        }
        super.dispose();
    }

    // 03/02/2005 b5097243 Pressing 'ESC' on a file dlg does not dispose the dlg on Xtoolkit
    @SuppressWarnings("deprecation")
    public void setVisible(boolean b){
        if (fileDialog == null) {
            init(target);
        }

        if (savedDir != null || userDir != null) {
            setDirectory(savedDir != null ? savedDir : userDir);
        }

        if (savedFile != null) {
            // Actually in Motif implementation lost file value which was saved after prevously showing
            // Seems we shouldn't restore Motif behaviour in this case
            setFile(savedFile);
        }

        super.setVisible(b);
        XChoicePeer choicePeer = AWTAccessor.getComponentAccessor()
                                            .getPeer(pathChoice);
        if (b == true){
            // See 6240074 for more information
            choicePeer.addXChoicePeerListener(this);
            KeyboardFocusManager.getCurrentKeyboardFocusManager()
                                .addKeyEventDispatcher(this);
        }else{
            // See 6240074 for more information
            choicePeer.removeXChoicePeerListener();
            KeyboardFocusManager.getCurrentKeyboardFocusManager()
                                .removeKeyEventDispatcher(this);
        }

        selectionField.requestFocusInWindow();
    }

    /*
     * Adding items to the path choice based on the text string
     * See 6240074 for more information
     */
    public void addItemsToPathChoice(String text){
        String[] dirList = getDirList(text);
        for (int i = 0; i < dirList.length; i++) pathChoice.addItem(dirList[i]);
    }

    /*
     * Refresh the unfurled choice at the time of the opening choice according to the text of the path field
     * See 6240074 for more information
     */
    public void unfurledChoiceOpening(ListHelper choiceHelper){

        // When the unfurled choice is opening the first time, we need only to add elements, otherwise we've got exception
        if (choiceHelper.getItemCount() == 0){
            addItemsToPathChoice(pathField.getText());
            return;
        }

        // If the set of the directories the exactly same as the used to be then dummy
        if (pathChoice.getItem(0).equals(pathField.getText()))
            return;

        pathChoice.removeAll();
        addItemsToPathChoice(pathField.getText());
    }

    /*
     * Refresh the file dialog at the time of the closing choice according to the selected item of the choice
     * See 6240074 for more information
     */
    public void unfurledChoiceClosing(){
          // This is the exactly same code as invoking later at the time of the itemStateChanged
          // Here is we restore Windows behaviour: change current directory if user press 'ESC'
          String dir = pathChoice.getSelectedItem();
          target.setDirectory(dir);
    }
}

@SuppressWarnings("serial") // JDK-implementation class
class Separator extends Canvas {
    public static final int HORIZONTAL = 0;
    public static final int VERTICAL = 1;
    int orientation;

    @SuppressWarnings("deprecation")
    public Separator(int length, int thickness, int orient) {
        super();
        orientation = orient;
        if (orient == HORIZONTAL) {
            resize(length, thickness);
        } else {
            // VERTICAL
            resize(thickness, length);
        }
    }

    @SuppressWarnings("deprecation")
    public void paint(Graphics g) {
        int x1, y1, x2, y2;
        Rectangle bbox = bounds();
        Color c = getBackground();
        Color brighter = c.brighter();
        Color darker = c.darker();

        if (orientation == HORIZONTAL) {
            x1 = 0;
            x2 = bbox.width - 1;
            y1 = y2 = bbox.height/2 - 1;

        } else {
            // VERTICAL
            x1 = x2 = bbox.width/2 - 1;
            y1 = 0;
            y2 = bbox.height - 1;
        }
        g.setColor(darker);
        g.drawLine(x1, y2, x2, y2);
        g.setColor(brighter);
        if (orientation == HORIZONTAL)
            g.drawLine(x1, y2+1, x2, y2+1);
        else
            g.drawLine(x1+1, y2, x2+1, y2);
    }
}

/*
 * Motif file dialogs let the user specify a filter that controls the files that
 * are displayed in the dialog. This filter is generally specified as a regular
 * expression. The class is used to implement Motif-like filtering.
 */
class FileDialogFilter implements FilenameFilter {

    String filter;

    public FileDialogFilter(String f) {
        filter = f;
    }

    /*
     * Tells whether or not the specified file should be included in a file list
     */
    public boolean accept(File dir, String fileName) {

        File f = new File(dir, fileName);

        if (f.isDirectory()) {
            return true;
        } else {
            return matches(fileName, filter);
        }
    }

    /*
     * Tells whether or not the input string matches the given filter
     */
    private boolean matches(String input, String filter) {
        String regex = convert(filter);
        return input.matches(regex);
    }

    /*
     * Converts the filter into the form which is acceptable by Java's regexps
     */
    private String convert(String filter) {
        String regex = "^" + filter + "$";
        regex = regex.replaceAll("\\.", "\\\\.");
        regex = regex.replaceAll("\\?", ".");
        regex = regex.replaceAll("\\*", ".*");
        return regex;
    }
}