/*

 * Copyright 2003-2008 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.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 com.sun.java.swing.plaf.motif.*;

import javax.swing.plaf.ComponentUI;

import java.util.logging.*;

import java.security.AccessController;

import java.security.PrivilegedAction;

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

    private static final Logger log = Logger.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;

    }

    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 = (String)AccessController.doPrivileged(

            new PrivilegedAction() {

                public Object 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();

        // 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);

        pathChoice = new Choice() {

                public Dimension getPreferredSize() {

                    return new Dimension(PATH_CHOICE_WIDTH, pathField.getPreferredSize().height);

                }

            };

        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 = (XChoicePeer)pathChoice.getPeer();

        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

     */

    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

     */

    String getFileName(String str) {

        if (str == null) {

            return "";

        }

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

        if (index == -1) {

            return str;

        } else {

            return str.substring(index + 1);

        }

    }

    /** 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

     */

    void handleSelection(String file) {

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

        if (index == -1) {

            savedDir = this.dir;

            savedFile = file;

        } else {

            savedDir = file.substring(0, index+1);

            savedFile = file.substring(index+1);

        }

        target.setDirectory(savedDir);

        target.setFile(savedFile);

    }

    /**

     * handle the cancel event

     */

    void handleCancel() {

        KeyboardFocusManager.getCurrentKeyboardFocusManager()

            .removeKeyEventDispatcher(this);

        setSelectionField(null);

        setFilterField(null);

        directoryList.clear();

        fileList.clear();

        target.setFile(null);

        target.setDirectory(null);

        handleQuitButton();

    }

    /**

     * handle the quit event

     */

    void handleQuitButton() {

        dir = null;

        file = null;

        target.hide();

    }

    /**

     * set the entry of the new dir with f

     */

    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

     */

    void setSelectionField(String str) {

        selectionField.setText(str);

    }

    /**

     * set the text in the filterField

     */

    void setFilterField(String str) {

        filterField.setText(str);

    }

    /**

     *

     * @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;

        }