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Jazzy example source code file (SpellEditorKit.java)

This example Jazzy source code file (SpellEditorKit.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Jazzy tags/keywords

awt, badlocationexception, badlocationexception, cursor, document, element, element, event, gui, jeditorpane, jmenuitem, linkcontroller, plaf, rectangle, rectangle, replacelistener, spellcheckeddocument, spellcheckeddocument, swing, util

The Jazzy SpellEditorKit.java source code

/*
Jazzy - a Java library for Spell Checking
Copyright (C) 2001 Mindaugas Idzelis
Full text of license can be found in LICENSE.txt

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
package com.swabunga.spell.swing;

import com.swabunga.spell.engine.SpellDictionary;
import com.swabunga.spell.engine.SpellDictionaryHashMap;
import com.swabunga.spell.engine.Word;

import javax.swing.*;
import javax.swing.plaf.TextUI;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.util.List;

/**
 *
 * use:
 * JTextPane pane = new JTextPane();
 * pane.setEditorKit(new SpellEditorKit());
 *
 *
 *
 *
 *
 * @author     Stig Tanggaard
 * April 14, 2002
 */
public class SpellEditorKit extends StyledEditorKit {

  // private static Color replyColor = null;
  // private static Cursor linkCursor;

  // private Cursor newCursor;
  protected static final Cursor linkCursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR);
  protected Cursor defaultCursor = Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);

  static SpellDictionary dictionary;

  public SpellEditorKit(File file) {
    super();
    Object o;
    try {
      o = new SpellDictionaryHashMap(file);
    } catch (Exception f) {
      o = null;
    }
    dictionary = (SpellDictionary) o;
  }

  public void install(JEditorPane c) {
    LinkController adapt = new LinkController();
    c.addMouseMotionListener(adapt);
    c.addMouseListener(adapt);
    super.install(c);
    //System.out.println("install stylededitorkit on editorpane");
    defaultCursor = c.getCursor();
  }

  public Document createDefaultDocument() {
    return new SpellCheckedDocument(dictionary);
  }

  public class LinkController extends MouseAdapter implements MouseMotionListener {
    private Element curElem = null;
    /**
     * If true, the current element (curElem) represents an image.
     */
    private boolean curElemImage = false;
    private String href = null;
    /** This is used by viewToModel to avoid allocing a new array each
     * time. */
    private Position.Bias[] bias = new Position.Bias[1];
    /**
     * Current offset.
     */
    private int curOffset;

    private int linkoffset = 0;

    /**
     * Called for a mouse click event.
     * If the component is read-only (ie a browser) then
     * the clicked event is used to drive an attempt to
     * follow the reference specified by a link.
     *
     * @param e the mouse event
     * @see MouseListener#mouseClicked
     */
    public void mouseClicked(MouseEvent e) {
      if (e.isPopupTrigger())
        return;

      JEditorPane editor = (JEditorPane) e.getSource();
      if (editor.isEditable()) {
        Point pt = new Point(e.getX(), e.getY());
        int pos = editor.viewToModel(pt);
        if (pos >= 0 && href != null) {
          //JPopupMenu menu = new JPopupMenu();
          SpellCheckedDocument hdoc = (SpellCheckedDocument) editor.getDocument();
          Element elem = hdoc.getCharacterElement(pos);
          try {
            final String word = hdoc.getText(elem.getStartOffset(), elem.getEndOffset() - elem.getStartOffset());

            List list = dictionary.getSuggestions(word, 5);
            JPopupMenu popup = new JPopupMenu();
            int index = 0;
            ReplaceListener listener = new ReplaceListener(elem.getStartOffset(), elem.getEndOffset() - elem.getStartOffset(), hdoc);
            while (index < list.size() && index < 5) {
              Word w = (Word) list.get(index);
              JMenuItem item = new JMenuItem(w.getWord());
              item.setActionCommand(w.getWord());
              item.addActionListener(listener);
              popup.add(item);
              index++;
            }
            JMenuItem item = new JMenuItem("Add word to wordlist");
            item.addActionListener(new ActionListener() {
              public void actionPerformed(ActionEvent e) {
                dictionary.addWord(word);
              }

            });
            popup.add(item);
            popup.show(editor, e.getX(), e.getY());

            //System.out.println("" + elem.getStartOffset() + " count " + elem.getEndOffset());
          } catch (BadLocationException f) {
            System.out.println("" + elem.getStartOffset() + " count " + elem.getElementCount());
          }
        }
      }
      href = null;
    }


    // ignore the drags
    public void mouseDragged(MouseEvent e) {
    }

    // track the moving of the mouse.
    public void mouseMoved(MouseEvent e) {
      int pos = -1;
//      int offset = 0;
      JEditorPane editor = (JEditorPane) e.getSource();
      //MailEditorKit kit = (MailEditorKit)editor.getEditorKit();
      boolean adjustCursor = true;
      Cursor newCursor = defaultCursor;
      if (editor.isEditable()) {
        Point pt = new Point(e.getX(), e.getY());
        pos = editor.getUI().viewToModel(editor, pt, bias);
        if (bias[0] == Position.Bias.Backward && pos > 0) {
          pos--;
        }
        if (pos >= 0 && (editor.getDocument() instanceof SpellCheckedDocument)) {
          SpellCheckedDocument hdoc = (SpellCheckedDocument) editor.getDocument();
          Element elem = hdoc.getCharacterElement(pos);
          if (!doesElementContainLocation(editor, elem, pos, e.getX(), e.getY())) {
            elem = null;
          }
          if (curElem != elem || curElemImage) {
//            Element lastElem = curElem;
            curElem = elem;
            //String href = null;
            curElemImage = false;
            if (elem != null) {
              AttributeSet a = elem.getAttributes();
              //System.out.println(
              //  a.getAttribute(StyleConstants.NameAttribute));

              if (a.getAttribute(StyleConstants.NameAttribute) == SpellCheckedDocument.ERROR_STYLE) {
                newCursor = linkCursor;
                linkoffset = elem.getStartOffset();
                //System.out.println("test + " + pos);
                try {
                  href = editor.getDocument().getText(elem.getStartOffset(), elem.getEndOffset() - elem.getStartOffset());
                } catch (BadLocationException f) {
                }
//                offset = elem.getStartOffset();

              } else {
                href = null;
              }
            }
          } else {
            adjustCursor = false;
          }
          curOffset = pos;
        }
      }
      //adjustCursor &&
      if (adjustCursor && editor.getCursor() != newCursor) {
        editor.setCursor(newCursor);
      }
    }

    /**
     * Returns true if the View representing <code>e contains
     * the location <code>x, y. offset
     * gives the offset into the Document to check for.
     */
    private boolean doesElementContainLocation(JEditorPane editor, Element e, int offset, int x, int y) {
      if (e != null && offset > 0 && e.getStartOffset() == offset) {
        try {
          TextUI ui = editor.getUI();
          Shape s1 = ui.modelToView(editor, offset, Position.Bias.Forward);
          Rectangle r1 = (s1 instanceof Rectangle) ? (Rectangle) s1 : s1.getBounds();
          Shape s2 = ui.modelToView(editor, e.getEndOffset(), Position.Bias.Backward);
          Rectangle r2 = (s2 instanceof Rectangle) ? (Rectangle) s2 : s2.getBounds();
          r1.add(r2);
          return r1.contains(x, y);
        } catch (BadLocationException ble) {
        }
      }
      return true;
    }

  }


  class ReplaceListener implements ActionListener {
    int offset;
    int length;
    Document doc;

    public ReplaceListener(int offset, int length, Document doc) {
      this.offset = offset;
      this.length = length;
      this.doc = doc;
    }

    public void actionPerformed(ActionEvent e) {
      try {
        doc.remove(offset, length);
        doc.insertString(offset, e.getActionCommand(), null);
      } catch (BadLocationException f) {
      }
    }
  }
}

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