alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file 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.

Other links

The source code

/*
 * 11/19/2001 - 00:47:08
 *
 * BoxComment.java
 * Copyright (C) 1999 Romain Guy
 * Portions copyright (C) 1998-2000 Slava Pestov
 *
 * This	free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package org.jext.actions;

import javax.swing.text.Element;
import org.jext.*;
import javax.swing.text.Document;
import java.awt.event.ActionEvent;
import javax.swing.text.BadLocationException;

public class BoxComment extends MenuAction implements EditAction
{
  public BoxComment()
  {
    super("box_comment");
  }

  public void actionPerformed(ActionEvent evt)
  {
    JextTextArea textArea = getTextArea(evt);
    Document doc = textArea.getDocument();

    String commentStart = textArea.getProperty("commentStart");
    String commentEnd = textArea.getProperty("commentEnd");
    String boxComment = textArea.getProperty("boxComment");

    if (commentStart == null || commentEnd == null || boxComment == null)
      return;

    commentStart = commentStart + ' ';
    commentEnd = ' ' + commentEnd;
    boxComment = boxComment + ' ';

    int selectionStart = textArea.getSelectionStart();
    int selectionEnd = textArea.getSelectionEnd();

    Element map = doc.getDefaultRootElement();
    int startLine = map.getElementIndex(selectionStart);
    int endLine = map.getElementIndex(selectionEnd);

    textArea.beginCompoundEdit();

    try
    {
      Element lineElement = map.getElement(startLine);
      int start = lineElement.getStartOffset();
      int indent = Utilities.getLeadingWhiteSpace(doc.getText(start, lineElement.getEndOffset() - start));
      doc.insertString(Math.max(start + indent, selectionStart), commentStart, null);

      for (int i = startLine + 1; i < endLine; i++)
      {
        lineElement = map.getElement(i);
        start = lineElement.getStartOffset();
        indent = Utilities.getLeadingWhiteSpace(doc.getText(start, lineElement.getEndOffset() - start));
        doc.insertString(start + indent, boxComment, null);
      }

      lineElement = map.getElement(endLine);
      start = lineElement.getStartOffset();
      indent = Utilities.getLeadingWhiteSpace(doc.getText(start, lineElement.getEndOffset() - start));

      if (startLine < endLine)
        doc.insertString(start + indent, boxComment, null);
      doc.insertString(Math.max(start + indent, textArea.getSelectionEnd()), commentEnd, null);
      
      textArea.setCaretPosition(textArea.getCaretPosition());
    } catch(BadLocationException ble) { }
    textArea.endCompoundEdit();
  }
}

// End of BoxComment.java
... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.