Jskad/source/org/thdl/tib/input/Jskad.java

/*
The contents of this file are subject to the THDL Open Community License
Version 1.0 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License on the THDL web site 
(http://www.thdl.org/).

Software distributed under the License is distributed on an "AS IS" basis, 
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the 
License for the specific terms governing rights and limitations under the 
License. 

The Initial Developer of this software is the Tibetan and Himalayan Digital
Library (THDL). Portions created by the THDL are Copyright 2001-2003 THDL.
All Rights Reserved. 

Contributor(s): ______________________________________.
*/

package org.thdl.tib.input;

import java.io.*;
import java.net.URL;
import java.awt.*;
import java.awt.event.*;

import java.awt.print.*;
import javax.swing.plaf.basic.*;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.text.rtf.*;

import java.util.Vector;

import org.thdl.tib.text.*;
import org.thdl.util.ThdlDebug;
import org.thdl.util.ThdlOptions;
import org.thdl.util.ThdlVersion;
import org.thdl.util.StatusBar;
import org.thdl.util.ThdlActionListener;
import org.thdl.util.HTMLPane;
import org.thdl.util.SimpleFrame;
import org.thdl.util.ThdlLazyException;



/**
* A simple Tibetan text editor. Jskad editors lack most of the
* functionality of a word-processor, but they do provide
* multiple keyboard input methods, as well as 
* conversion routines to go back and forth between Extended
* Wylie and TibetanMachineWeb.
* <p>
* Jskad embeds {@link DuffPane DuffPane}, which is the editing
* window where the keyboard logic and most functionality is housed.
* <p>
* Depending on the object passed to the constructor,
* a Jskad object can be used in either an application or an
* applet.
* @author Edward Garrett, Tibetan and Himalayan Digital Library
* @version 1.0
*/
public class Jskad extends JPanel implements DocumentListener {

    /** the name of the property a developer should set to see
        low-level info on how keypresses in "Tibetan" input mode are
        being interpreted */
    private final static String enableKeypressStatusProp
        = "thdl.Jskad.enable.tibetan.mode.status";

    /** the middleman that keeps code regarding Tibetan keyboards
     *  clean */
    private final static JskadKeyboardManager keybdMgr
		= new JskadKeyboardManager(JskadKeyboardFactory.getAllAvailableJskadKeyboards());

	private JComboBox fontFamilies, fontSizes;
	private JFileChooser fileChooser;
	private javax.swing.filechooser.FileFilter rtfFilter;
	private javax.swing.filechooser.FileFilter txtFilter;
	private int fontSize = 0;
	private Object parentObject = null;
	private static int numberOfTibsRTFOpen = 0;
	private static int x_size;
	private static int y_size;

/**
* The text editing window which this Jskad object embeds.
*/
	public DuffPane dp;
/**
* Has the document been saved since it was last changed?
*/
	public boolean hasChanged = false;

/**
* The filename, if any, associated with this instance of Jskad.
*/
	public String fileName = null;

    /** the status bar for this frame */
    private StatusBar statusBar;

    /** Do not use this JPanel constructor. */
    private Jskad() { super(); }
    
    /** Do not use this JPanel constructor. */
    private Jskad(boolean isDB) { super(isDB); }
    
    /** Do not use this JPanel constructor. */
    private Jskad(LayoutManager lm) { super(lm); }
    
    /** Do not use this JPanel constructor. */
    private Jskad(LayoutManager lm, boolean isDB) { super(lm, isDB); }

    /** Saves user preferences to disk if possible. */
    private static void savePreferencesAction() {
        try {
            ThdlOptions.saveUserPreferences();
        } catch (IOException ioe) {
            System.out.println("IO Exception saving user preferences to " + ThdlOptions.getUserPreferencesPath());
            ioe.printStackTrace();
            ThdlDebug.noteIffyCode();
        }
    }

    /** pane displaying Jskad's single HTML help file */
    private static HTMLPane helpPane;

/**
* @param parent the object that embeds this instance of Jskad.
* Supported objects include JFrames and JApplets. If the parent
* is a JApplet then the File menu is omitted from the menu bar.
*/
	public Jskad(final Object parent) {
        super();

        if (ThdlOptions.getBooleanOption("thdl.Jskad.disable.status.bar")) {
            statusBar = null;
        } else {
            statusBar
                = new StatusBar(ThdlOptions.getStringOption("thdl.Jskad.initial.status.message",
                                                            "Welcome to Jskad!"));
        }
		parentObject = parent;
		numberOfTibsRTFOpen++;
		JMenuBar menuBar = new JMenuBar();

		if (parentObject instanceof JFrame || parentObject instanceof JInternalFrame) {
            String whereToStart
                = ThdlOptions.getStringOption("thdl.Jskad.working.directory",
                                              null);
            fileChooser
                = new JFileChooser(whereToStart.equals("") ? null : whereToStart);
			rtfFilter = new RTFFilter();
			txtFilter = new TXTFilter();
			fileChooser.addChoosableFileFilter(rtfFilter);

			JMenu fileMenu = new JMenu("File");

			JMenuItem newItem = new JMenuItem("New");
//			newItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,java.awt.Event.CTRL_MASK)); //Ctrl-n
			newItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					newFile();
				}
			});
			fileMenu.add(newItem);

			JMenuItem openItem = new JMenuItem("Open");
//			openItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,java.awt.Event.CTRL_MASK)); //Ctrl-o
			openItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					openFile();
				}
			});
			fileMenu.add(openItem);

			if (parentObject instanceof JFrame) {
				JMenuItem closeItem = new JMenuItem("Close");	
				closeItem.addActionListener(new ThdlActionListener() {
					public void theRealActionPerformed(ActionEvent e) {
						if (!hasChanged || hasChanged && checkSave()) {
							numberOfTibsRTFOpen--;

							if (numberOfTibsRTFOpen == 0)
								System.exit(0);
							else {
								final JFrame parentFrame = (JFrame)parentObject;
								parentFrame.dispose();
							}
						}
					}
				});
				fileMenu.add(closeItem);
			}

			JMenuItem saveItem = new JMenuItem("Save");
//			saveItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,java.awt.Event.CTRL_MASK)); //Ctrl-s
			saveItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					if (fileName == null)
						saveAsFile();
					else
						saveFile();
				}

			});
			fileMenu.addSeparator();
			fileMenu.add(saveItem);

			JMenuItem saveAsItem = new JMenuItem("Save as");
			saveAsItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					saveAsFile();
				}
			});
			fileMenu.add(saveAsItem);

			menuBar.add(fileMenu);
		}

		JMenu editMenu = new JMenu("Edit");

		if (parentObject instanceof JFrame || parentObject instanceof JInternalFrame) {
			JMenuItem cutItem = new JMenuItem("Cut");
			cutItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,
                                                          java.awt.Event.CTRL_MASK)); //Ctrl-x
			cutItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					cutSelection();					
				}
			});
			editMenu.add(cutItem);

			JMenuItem copyItem = new JMenuItem("Copy");
			copyItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,
                                                           java.awt.Event.CTRL_MASK)); //Ctrl-c
			copyItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					copySelection();
				}
			});
			editMenu.add(copyItem);

			JMenuItem pasteItem = new JMenuItem("Paste");
			pasteItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,
                                                            java.awt.Event.CTRL_MASK)); //Ctrl-v
			pasteItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					pasteSelection();
				}
			});
			editMenu.add(pasteItem);
			editMenu.addSeparator();

			JMenuItem selectallItem = new JMenuItem("Select All");
			selectallItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,
                                                                java.awt.Event.CTRL_MASK)); //Ctrl-a
			selectallItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					dp.setSelectionStart(0);
					dp.setSelectionEnd(dp.getDocument().getLength());
				}
			});
			editMenu.add(selectallItem);
		}

        {
            JMenuItem preferencesItem = new JMenuItem("Preferences");
            preferencesItem.addActionListener(new ThdlActionListener() {
                    public void theRealActionPerformed(ActionEvent e) {
                        getPreferences();
                    }
                });
            editMenu.addSeparator();
            editMenu.add(preferencesItem);
        }

        {
            JMenuItem preferencesItem = new JMenuItem("Save preferences to " + ThdlOptions.getUserPreferencesPath());
            preferencesItem.addActionListener(new ThdlActionListener() {
                    public void theRealActionPerformed(ActionEvent e) {
                        savePreferencesAction();
                    }
                });
            editMenu.add(preferencesItem);
        }

        menuBar.add(editMenu);

		JMenu toolsMenu = new JMenu("Tools");

		JMenuItem TMWWylieItem = new JMenuItem("Convert Tibetan to Wylie");
		TMWWylieItem.addActionListener(new ThdlActionListener() {
			public void theRealActionPerformed(ActionEvent e) {
				toWylie();
			}
		});
		toolsMenu.add(TMWWylieItem);

		JMenuItem wylieTMWItem = new JMenuItem("Convert Wylie to Tibetan");
		wylieTMWItem.addActionListener(new ThdlActionListener() {
			public void theRealActionPerformed(ActionEvent e) {
				toTibetan();
			}
		});
		toolsMenu.add(wylieTMWItem);

		if (parentObject instanceof JFrame || parentObject instanceof JInternalFrame) {
			JMenuItem importItem = new JMenuItem("Import Wylie as Tibetan");
			importItem.addActionListener(new ThdlActionListener() {
				public void theRealActionPerformed(ActionEvent e) {
					importWylie();
				}
			});
			toolsMenu.addSeparator();
			toolsMenu.add(importItem);
		}

        if (ThdlOptions.getBooleanOption("thdl.add.developer.options.to.menu")) {
            toolsMenu.addSeparator();
            JMenuItem DevelItem = new JMenuItem("Toggle read-only");
            DevelItem.addActionListener(new ThdlActionListener() {
                    public void theRealActionPerformed(ActionEvent e) {
                        dp.setEditable(!dp.isEditable());
                    }
                });
            toolsMenu.add(DevelItem);
        }

		menuBar.add(toolsMenu);

		JMenu infoMenu = new JMenu("Info");

        {
            JMenuItem helpItem = new JMenuItem("Help");
            helpItem.addActionListener(new ThdlActionListener() {
                    public void theRealActionPerformed(ActionEvent e) {
                        if (helpPane == null) {
                            try {
                                helpPane
                                    = new HTMLPane(Jskad.class,
                                                   "/org/thdl/tib/input/jskad_doc.html");
                            } catch (Exception ex) {
                                ex.printStackTrace(System.err);
                                throw new ThdlLazyException(ex);
                                /* DLC FIXME--handle this better.
                                   show a dialog saying "help can't be
                                   loaded, surf to thdl's web site and
                                   also submit a bug report." */
                            }
                        }
                        new SimpleFrame("Help for Jskad", helpPane);
                        /* DLC FIXME -- pressing the "Help" menu item
                           twice causes the first pane to become dead.
                           We should check to see if the first pane
                           exists and raise it rather than creating a
                           second pane. */
                    }
                });
            infoMenu.add(helpItem);
            infoMenu.addSeparator();
        }

        for (int i = 0; i < keybdMgr.size(); i++) {
            final JskadKeyboard kbd = keybdMgr.elementAt(i);
            if (kbd.hasQuickRefFile()) {
                JMenuItem keybdItem = new JMenuItem(kbd.getIdentifyingString());
                keybdItem.addActionListener(new ThdlActionListener() {
                        public void theRealActionPerformed(ActionEvent e) {
                            new SimpleFrame(kbd.getIdentifyingString(),
                                            kbd.getQuickRefPane());
                            /* DLC FIXME -- pressing the "Extended
                               Wylie" menu item twice causes the first
                               pane to become dead.  We should check
                               to see if the first pane exists and
                               raise it rather than creating a second
                               pane. */
                        }
                    });
                infoMenu.add(keybdItem);
            }
        }

		infoMenu.addSeparator();

        {
            JMenuItem aboutItem = new JMenuItem("About");
            aboutItem.addActionListener(new ThdlActionListener() {
                    public void theRealActionPerformed(ActionEvent e) {
                        JOptionPane.showMessageDialog(Jskad.this,
                                                      "Copyright 2001-2003 Tibetan and Himalayan Digital Library\n\n"+
                                                      "Jskad is protected by the THDL Open Community License.\n\n"+ /* FIXME HARD-CODED VERSION NUMBER */
			
                                                      "For more information, or to download the source code\n"+
                                                      "for Jskad, visit our web site:\n"+
                                                      "     http://www.thdl.org/\n" +
                                                      "\n" +
                                                      "When submitting bug reports, please indicate that the\n" +
                                                      "time of compilation is "
                                                      + ThdlVersion.getTimeOfCompilation() + "\n",
                                                      "About Jskad", JOptionPane.PLAIN_MESSAGE);
                    }
                });
            infoMenu.add(aboutItem);
        }

		menuBar.add(infoMenu);

        /* Initialize dp before calling
           JskadKeyboard.activate(DuffPane) or dp.toggleLanguage(). */
        if (ThdlOptions.getBooleanOption(Jskad.enableKeypressStatusProp)) {
            dp = new DuffPane(statusBar);
        } else {
            dp = new DuffPane();
        }


		JToolBar toolBar = new JToolBar();
		toolBar.setBorder(null);
		toolBar.addSeparator();
		toolBar.add(new JLabel("Input mode:"));
		toolBar.addSeparator();

		String[] input_modes = {"Tibetan","Roman"};
		final JComboBox inputmethods = new JComboBox(input_modes);

        int initialInputMethod
            = ThdlOptions.getIntegerOption("thdl.Jskad.input.method", 0);
        if (!dp.isRomanEnabled() && 1 == initialInputMethod) {
            initialInputMethod = 0;
            System.out.println("Hey yo!  Roman input mode is not enabled, but your preference is for Roman mode at startup.  Sorry!");
            ThdlDebug.noteIffyCode();
        }
        try {
            inputmethods.setSelectedIndex(initialInputMethod);
        } catch (IllegalArgumentException e) {
            initialInputMethod = 0; // Tibetan is the default.
            inputmethods.setSelectedIndex(initialInputMethod);
        }
        // Because we start in Tibetan mode, we must toggle initially
        // if the user wants it that way:
        if (1 == initialInputMethod && dp.isRomanEnabled())
            dp.toggleLanguage();

		inputmethods.addActionListener(new ThdlActionListener() {
			public void theRealActionPerformed(ActionEvent e) {
                int si = inputmethods.getSelectedIndex();
                ThdlOptions.setUserPreference("thdl.Jskad.input.method", si);
				switch (si) {
					case 0: //Tibetan
						if (dp.isRomanMode())
							dp.toggleLanguage();
                        statusBar.replaceStatus("Now inputting Tibetan script");
						break;

					case 1: //Roman
						if (!dp.isRomanMode() && dp.isRomanEnabled())
							dp.toggleLanguage();
                        statusBar.replaceStatus("Now inputting Roman script");
						break;
				}
			}
		});


		toolBar.add(inputmethods);
		toolBar.add(Box.createHorizontalGlue());

		toolBar.add(new JLabel("Keyboard:"));
		toolBar.addSeparator();

		final JComboBox keyboards
            = new JComboBox(keybdMgr.getIdentifyingStrings());
        int initialKeyboard
            = ThdlOptions.getIntegerOption("thdl.default.tibetan.keyboard", 0);
        try {
            keyboards.setSelectedIndex(initialKeyboard);
        } catch (IllegalArgumentException e) {
            initialKeyboard = 0; // good ol' Wylie
            keyboards.setSelectedIndex(initialKeyboard);
        }
        keybdMgr.elementAt(initialKeyboard).activate(dp);
		keyboards.addActionListener(new ThdlActionListener() {
			public void theRealActionPerformed(ActionEvent e) {
                int ki = keyboards.getSelectedIndex();
                keybdMgr.elementAt(keyboards.getSelectedIndex()).activate(dp);
                ThdlOptions.setUserPreference("thdl.default.tibetan.keyboard",
                                              ki);
			}
		});
		toolBar.add(keyboards);
		toolBar.add(Box.createHorizontalGlue());

		JScrollPane sp = new JScrollPane(dp, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
		dp.getDocument().addDocumentListener(this);

		if (parentObject instanceof JFrame) {
			final JFrame parentFrame = (JFrame)parentObject;
			parentFrame.setJMenuBar(menuBar);
			parentFrame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
			parentFrame.addWindowListener(new WindowAdapter () {
				public void windowClosing (WindowEvent e) {
					if (!hasChanged || hasChanged && checkSave()) {
						numberOfTibsRTFOpen--;
						if (numberOfTibsRTFOpen == 0)
							System.exit(0);
						else
							parentFrame.dispose();
					}
				}
			});
		}

		else if (parentObject instanceof JInternalFrame) {
			final JInternalFrame parentFrame = (JInternalFrame)parentObject;
			parentFrame.setJMenuBar(menuBar);
		}

		else if (parentObject instanceof JApplet) {
			JApplet parentApplet = (JApplet)parentObject;
			parentApplet.setJMenuBar(menuBar);
			dp.disableCutAndPaste();
		}

		setLayout(new BorderLayout());
		add("North", toolBar);
		add("Center", sp);
        if (statusBar != null)
            add("South", statusBar);
	}

	private void getPreferences() {
		GraphicsEnvironment genv = GraphicsEnvironment.getLocalGraphicsEnvironment();
		String[] fontNames = genv.getAvailableFontFamilyNames();

		JPanel tibetanPanel;
		JComboBox tibetanFontSizes;

		tibetanPanel = new JPanel();
		tibetanPanel.setBorder(BorderFactory.createTitledBorder("Set Tibetan Font Size"));
		tibetanFontSizes = new JComboBox(new String[] {"8","10","12","14","16","18","20","22","24","26","28","30","32","34","36","48","72"});
		tibetanFontSizes.setMaximumSize(tibetanFontSizes.getPreferredSize());
		tibetanFontSizes.setSelectedItem(String.valueOf(dp.getTibetanFontSize()));
		tibetanFontSizes.setEditable(true);
		tibetanPanel.add(tibetanFontSizes);

		JPanel romanPanel;
		JComboBox romanFontFamilies;
		JComboBox romanFontSizes;

		romanPanel = new JPanel();
		romanPanel.setBorder(BorderFactory.createTitledBorder("Set non-Tibetan Font and Size"));
		romanFontFamilies = new JComboBox(fontNames);
		romanFontFamilies.setMaximumSize(romanFontFamilies.getPreferredSize());
		romanFontFamilies.setSelectedItem(dp.getRomanFontFamily());
		romanFontFamilies.setEditable(true);
		romanFontSizes = new JComboBox(new String[] {"8","10","12","14","16","18","20","22","24","26","28","30","32","34","36","48","72"});
		romanFontSizes.setMaximumSize(romanFontSizes.getPreferredSize());
		romanFontSizes.setSelectedItem(String.valueOf(dp.getRomanFontSize()));
		romanFontSizes.setEditable(true);
		romanPanel.setLayout(new GridLayout(1,2));
		romanPanel.add(romanFontFamilies);
		romanPanel.add(romanFontSizes);

		JPanel preferencesPanel = new JPanel();
		preferencesPanel.setLayout(new GridLayout(2,1));
		preferencesPanel.add(tibetanPanel);
		preferencesPanel.add(romanPanel);

		JOptionPane pane = new JOptionPane(preferencesPanel);
		JDialog dialog = pane.createDialog(this, "Preferences");

        // This returns only when the user has closed the dialog:
		dialog.show();

		int size;
		try {
			size = Integer.parseInt(tibetanFontSizes.getSelectedItem().toString());
            dp.setByUserTibetanFontSize(size);
		}
		catch (NumberFormatException ne) {
			size = dp.getTibetanFontSize();
            dp.setTibetanFontSize(size);
		}

		String font = romanFontFamilies.getSelectedItem().toString();
		try {
			size = Integer.parseInt(romanFontSizes.getSelectedItem().toString());
		}
		catch (NumberFormatException ne) {
			size = dp.getRomanFontSize();
		}
        dp.setByUserRomanAttributeSet(font, size);
	}

	private void newFile() {
		if (dp.getDocument().getLength()>0 && parentObject instanceof JFrame) {
			JFrame parentFrame = (JFrame)parentObject;
			JFrame newFrame = new JFrame("Jskad");
			Point point = parentFrame.getLocationOnScreen();
			newFrame.setSize(parentFrame.getSize().width, parentFrame.getSize().height);
			newFrame.setLocation(point.x+50, point.y+50);
			newFrame.getContentPane().add(new Jskad(newFrame));
			newFrame.setVisible(true);
		}
		else {
			if (parentObject instanceof JFrame) {
				JFrame parentFrame = (JFrame)parentObject;
				parentFrame.setTitle("Jskad");
			}
			else if (parentObject instanceof JInternalFrame) {
				JInternalFrame parentFrame = (JInternalFrame)parentObject;
				parentFrame.setTitle("Jskad");
			}
			dp.newDocument();
			dp.getDocument().addDocumentListener(Jskad.this);
			hasChanged = false;
		}
	}

	private void openFile() {
        String whereToStart
            = ThdlOptions.getStringOption("thdl.Jskad.working.directory",
                                          null);
		fileChooser
			= new JFileChooser(whereToStart.equals("") ? null : whereToStart);
		fileChooser.addChoosableFileFilter(rtfFilter);

        setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));

        if (fileChooser.showOpenDialog(this) != JFileChooser.APPROVE_OPTION) {
            setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
            return;
        }

        final File fileChosen = fileChooser.getSelectedFile();
        final String f_name = fileChosen.getAbsolutePath();

        try {
            if (dp.getDocument().getLength()>0 && parentObject instanceof JFrame) {
                JFrame parentFrame = (JFrame)parentObject;
                InputStream in = new FileInputStream(fileChosen);
                ThdlOptions.setUserPreference("thdl.Jskad.working.directory",
                                              fileChosen.getParentFile().getAbsolutePath());
                JFrame newFrame = new JFrame(f_name);
                Point point = parentFrame.getLocationOnScreen();
                newFrame.setSize(x_size, y_size);
                newFrame.setLocation(point.x+50, point.y+50);
                Jskad newRTF = new Jskad(newFrame);
                newFrame.getContentPane().add(newRTF);
                newRTF.dp.rtfEd.read(in, newRTF.dp.getDocument(), 0);
                newRTF.dp.getDocument().addDocumentListener(newRTF);
                in.close();
                newFrame.setTitle(f_name);
                newRTF.fileName = new String(f_name);
                newRTF.hasChanged = false;
                newRTF.dp.getCaret().setDot(0);
                newFrame.setVisible(true);
            } else {
                InputStream in = new FileInputStream(fileChosen);
                ThdlOptions.setUserPreference("thdl.Jskad.working.directory",
                                              fileChosen.getParentFile().getAbsolutePath());
                dp.newDocument();
                dp.rtfEd.read(in, dp.getDocument(), 0);
                in.close();
                dp.getCaret().setDot(0);
                dp.getDocument().addDocumentListener(Jskad.this);
                hasChanged = false;
                fileName = new String(f_name);

                if (parentObject instanceof JFrame) {
                    JFrame parentFrame = (JFrame)parentObject;
                    parentFrame.setTitle(fileName);
                }
                else if (parentObject instanceof JInternalFrame) {
                    JInternalFrame parentFrame = (JInternalFrame)parentObject;
                    parentFrame.setTitle(fileName);
                }
            }
        }
        catch (FileNotFoundException fnfe) {
            JOptionPane.showMessageDialog(Jskad.this,
                                          "No such file exists.",
                                          "Open File Error",
                                          JOptionPane.ERROR_MESSAGE);
        }
        catch (IOException ioe) {
            JOptionPane.showMessageDialog(Jskad.this,
                                          "Error reading file.",
                                          "Open File Error",
                                          JOptionPane.ERROR_MESSAGE);
        }
        catch (BadLocationException ble) {
            ThdlDebug.noteIffyCode();
        }
        setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
	}

	private void saveFile() {
		String s = getSave(fileName);
		if (null != s) {
			if (parentObject instanceof JFrame) {
				JFrame parentFrame = (JFrame)parentObject;
				parentFrame.setTitle(s);
				fileName = new String(s);
			}
			else if (parentObject instanceof JInternalFrame) {
				JInternalFrame parentFrame = (JInternalFrame)parentObject;
				parentFrame.setTitle(s);
				fileName = new String(s);
			}
		}
	}

	private void saveAsFile() {
		String s = getSaveAs();
		if (null != s) {
			if (parentObject instanceof JFrame) {
				JFrame parentFrame = (JFrame)parentObject;
				parentFrame.setTitle(s);
				fileName = new String(s);
			}
			else if (parentObject instanceof JInternalFrame) {
				JInternalFrame parentFrame = (JInternalFrame)parentObject;
				parentFrame.setTitle(s);
				fileName = new String(s);
			}
		}
	}

	private boolean checkSave() {
        if (ThdlOptions.getBooleanOption("thdl.Jskad.do.not.confirm.quit")) {
            return true;
        }

		int saveFirst = JOptionPane.showConfirmDialog(this, "Do you want to save your changes?", "Please select", JOptionPane.YES_NO_CANCEL_OPTION);

		switch (saveFirst) {
			case JOptionPane.NO_OPTION: //don't save but do continue
				return true;

			case JOptionPane.YES_OPTION: //save and continue
				if (fileName == null) {
					saveAsFile();
}
				else
					saveFile();
				return true;

			default:
				return false;
		}
	}

	private String getSave(String f_name) {
		File fileChosen = new File(f_name);

		try {
			BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(fileChosen));
			dp.rtfEd.write(out, dp.getDocument(), 0, dp.getDocument().getLength());
			out.flush();
			out.close();
			hasChanged = false;
		} catch (IOException exception) {
            JOptionPane.showMessageDialog(Jskad.this,
                                          "Cannot save to that file.",
                                          "Save As Error",
                                          JOptionPane.ERROR_MESSAGE);

			return null;
		} catch (BadLocationException ble) {
			ble.printStackTrace();
			ThdlDebug.noteIffyCode();
		}
		return f_name;
	}

	private String getSaveAs() {
		setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));

		if (fileName == null)
			fileChooser.setSelectedFile(null);
		else
			fileChooser.setSelectedFile(new File(fileName));

		if (fileChooser.showSaveDialog(this) != JFileChooser.APPROVE_OPTION) {
			setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
			return null;
		}

		File fileChosen = fileChooser.getSelectedFile();
        ThdlOptions.setUserPreference("thdl.Jskad.working.directory",
                                      fileChosen.getParentFile().getAbsolutePath());
		String fileName = fileChosen.getAbsolutePath();
		int i = fileName.lastIndexOf('.');

		if (i < 0)
			fileName += ".rtf";
		else
			fileName = fileName.substring(0, i) + ".rtf";

		getSave(fileName);

		fileChooser.rescanCurrentDirectory();
		setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
		return fileName;
	}

	private void cutSelection() {
        dp.cutCurrentSelection();
	}

	private void copySelection() {
        dp.copyCurrentSelection();
	}

	private void pasteSelection() {
		dp.paste(dp.getCaret().getDot());
	}

	private void toTibetan() {
		Jskad.this.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
		dp.toTibetanMachineWeb();
		Jskad.this.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
	}

	private void toWylie() {
		Jskad.this.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
		dp.toWylie(dp.getSelectionStart(), dp.getSelectionEnd());
		Jskad.this.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
	}

	private void importWylie() {
		fileChooser.removeChoosableFileFilter(rtfFilter);
		fileChooser.addChoosableFileFilter(txtFilter);

		if (fileChooser.showDialog(Jskad.this, "Import Wylie") != JFileChooser.APPROVE_OPTION) {
			setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
			fileChooser.removeChoosableFileFilter(txtFilter);
			fileChooser.addChoosableFileFilter(rtfFilter);
			return;
		}

		File txt_fileChosen = fileChooser.getSelectedFile();
		fileChooser.rescanCurrentDirectory();
		setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
		fileChooser.removeChoosableFileFilter(txtFilter);
		fileChooser.addChoosableFileFilter(rtfFilter);

		if (fileChooser.showDialog(Jskad.this, "Save as Tibetan") != JFileChooser.APPROVE_OPTION) {
			setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
			return;
		}

		File rtf_fileChosen = fileChooser.getSelectedFile();
		fileChooser.rescanCurrentDirectory();
		setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
		String rtf_fileName = rtf_fileChosen.getAbsolutePath();
		int i = rtf_fileName.lastIndexOf('.');

		if (i < 0)
			rtf_fileName += ".rtf";
		else
			rtf_fileName = fileName.substring(0, i) + ".rtf";

		try {
			BufferedReader in = new BufferedReader(new FileReader(txt_fileChosen));
            DuffPane dp2;
            // FIXME: why do we need a whole DuffPane to do this?  we
            // definitely don't need a status bar...
            if (ThdlOptions.getBooleanOption(Jskad.enableKeypressStatusProp)) {
                dp2 = new DuffPane(statusBar);
            } else {
                dp2 = new DuffPane();
            }

			try {
				String val = in.readLine();

				while (val != null) {
					dp2.toTibetanMachineWeb(val + "\n", dp2.getCaret().getDot());
					val = in.readLine();
				}

				TibetanDocument t_doc = (TibetanDocument)dp2.getDocument();
				t_doc.writeRTFOutputStream(new FileOutputStream(new File(rtf_fileName)));
			}
			catch (IOException ioe) {
                ThdlDebug.noteIffyCode();
				System.out.println("problem reading or writing file");
			}
		}
		catch (FileNotFoundException fnfe) {
                ThdlDebug.noteIffyCode();
			System.out.println("problem reading file");
		}
	}

/**
* Allows use of Jskad as dependent JFrame.
* Once you've called this method, users will
* be able to close Jskad without shutting
* down your superordinate application.
*/
	public void makeDependent() {
		numberOfTibsRTFOpen++;
	}

/**
* Fills the editing pane with content. If the
* editing pane already has content, this method does nothing.
*
* @param wylie the string of wylie you want to
* put in the editing pane
*/
	public void setContent(String wylie) {
		if (dp.getDocument().getLength() > 0)
			return;

		dp.newDocument();
		dp.toTibetanMachineWeb(wylie, 0);
	}

/**
* Enables typing of Roman (non-Tibetan) text along
* with Tibetan.
*/
	public void enableRoman() {
		dp.enableRoman();
	}

/**
* Disables typing of Roman (non-Tibetan) text.
*/
	public void disableRoman() {
		dp.disableRoman();
	}

/*
	private void showAttributes(int pos) {
		dp.skipUpdate = true;

		AttributeSet attr = dp.getDocument().getCharacterElement(pos).getAttributes();
		String name = StyleConstants.getFontFamily(attr);

		if (!fontName.equals(name)) {
			fontName = name;
			fontFamilies.setSelectedItem(name);
		}
		int size = StyleConstants.getFontSize(attr);
		if (fontSize != size) {
			fontSize = size;
			fontSizes.setSelectedItem(Integer.toString(fontSize));
		}

		dp.skipUpdate = false;
	}
*/

/**
* Required for implementations of DocumentListener.
* Does nothing.
*/
	public void changedUpdate(DocumentEvent de) {
	}

/**
* Required for implementations of DocumentListener.
* Informs the object that a change in the document
* has occurred.
*
* @param de a DocumentEvent
*/
	public void insertUpdate(DocumentEvent de) {
		hasChanged = true;
	}

/**
* Required for implementations of DocumentListener.
* Informs the object that a change in the document
* has occurred.
*
* @param de a DocumentEvent
*/
	public void removeUpdate(DocumentEvent de) {
		hasChanged = true;
	}

	private class RTFFilter extends javax.swing.filechooser.FileFilter {
		// Accept all directories and all RTF files.

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

			String fName = f.getName();
			int i = fName.lastIndexOf('.');

			if (i < 0)
				return false;

			else {
				String ext = fName.substring(i+1).toLowerCase();

				if (ext.equals("rtf"))
					return true;
				else
					return false;
			}
		}
    
		//the description of this filter
		public String getDescription() {
			return "Rich Text Format (.rtf)";
		}
	}

	private class TXTFilter extends javax.swing.filechooser.FileFilter {
		// Accept all directories and all TXT files.

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

			String fName = f.getName();
			int i = fName.lastIndexOf('.');

			if (i < 0)
				return false;

			else {
				String ext = fName.substring(i+1).toLowerCase();

				if (ext.equals("txt"))
					return true;
				else
					return false;
			}
		}
    
		//the description of this filter
		public String getDescription() {
			return "Text file (.txt)";
		}
	}



/**
* Runs Jskad.  System output, including errors, is redirected to
* jskad.log in addition to appearing on the console as per usual.  If
* you discover a bug, please send us an email, making sure to include
* the jskad.log file as an attachment.  */
	public static void main(String[] args) {
        try {
            ThdlDebug.attemptToSetUpLogFile("jskad", ".log");

            try {
                UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            }
            catch (Exception e) {
                ThdlDebug.noteIffyCode();
            }

            JFrame f = new JFrame("Jskad");
            Dimension d = f.getToolkit().getScreenSize();
            x_size = d.width/4*3;
            y_size = d.height/4*3;
            f.setSize(x_size, y_size);
            f.setLocation(d.width/8, d.height/8);
            f.getContentPane().add(new Jskad(f));
            f.setVisible(true);

            /* Make it so that any time the user exits Jskad by
             * (almost) any means, the user's preferences are saved if
             * the SecurityManager allows it and the path is
             * correct. */
            Runtime.getRuntime().addShutdownHook(new Thread() {
                    public void run() {
                        savePreferencesAction();
                    }
                }
                                                );

        } catch (ThdlLazyException e) {
            // FIXME: tell the users how to submit bug reports.
            System.err.println("Jskad has a BUG:");
            e.getRealException().printStackTrace(System.err);
            System.exit(1);
        }
	}
}