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Java example source code file (SAEditorPane.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

awt, badlocationexception, datatransfer, document, element, elementiterator, event, exception, gui, jeditorpane, saeditorpane, string, stringbuffer, swing, text

The SAEditorPane.java Java example source code

/*
 * Copyright (c) 2004, 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.
 *
 * 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.jvm.hotspot.ui;

import java.io.*;
import java.awt.event.*;
import java.awt.im.InputContext;
import java.awt.datatransfer.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;

/** A simple subclass of JEditorPane for displaying uneditable html
 */

public class SAEditorPane extends JEditorPane {

  public SAEditorPane() {
    setEditable(false);
    setContentType("text/html");
  }

  /**
      Override getSelectedText so that <br> elements produce \n when
      text is copied out of the window.
   */

  public String getSelectedText() {
    StringBuffer result = new StringBuffer();
    Document doc = getDocument();

    int start = getSelectionStart();
    int end = getSelectionEnd();

    try {
      // Create an iterator using the root element
      ElementIterator it = new ElementIterator(doc.getDefaultRootElement());

      // Iterate all content elements (which are leaves)
      Element e;
      String separator = System.getProperty("line.separator");
      while ((e = it.next()) != null) {
        if (e.isLeaf()) {
          int rangeStart = e.getStartOffset();
          int rangeEnd = e.getEndOffset();

          if (rangeEnd < start || rangeStart > end) continue;
          if (end < rangeEnd) rangeEnd = end;
          if (start > rangeStart) rangeStart = start;
          try {
            String line = getText(rangeStart, rangeEnd-rangeStart);
            if (e.getName().equals("br"))
              result.append(separator);
            else
              result.append(line);
          } catch (BadLocationException ex) {
          }
        }
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
    return result.toString();
  }

  public void setText(String text) {
    super.setText(text);
    // put the cursor at the top instead of leaving it at the end.
    setCaretPosition(0);
  }
}

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