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/*******************************************************************************
* Copyright (c) 2015 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Lesser General Public
* License v3.0 which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/lgpl.html
* <p>
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma.gui;
import cuchaz.enigma.source.Token;
import javax.swing.*;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.Highlighter.HighlightPainter;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class CodeReader extends JEditorPane {
private static final long serialVersionUID = 3673180950485748810L;
// HACKHACK: someday we can update the main GUI to use this code reader
public static void navigateToToken(final JEditorPane editor, final Token token, final HighlightPainter highlightPainter) {
// set the caret position to the token
Document document = editor.getDocument();
int clampedPosition = Math.min(Math.max(token.start, 0), document.getLength());
editor.setCaretPosition(clampedPosition);
editor.grabFocus();
try {
// make sure the token is visible in the scroll window
Rectangle start = editor.modelToView(token.start);
Rectangle end = editor.modelToView(token.end);
final Rectangle show = start.union(end);
show.grow(start.width * 10, start.height * 6);
SwingUtilities.invokeLater(() -> editor.scrollRectToVisible(show));
} catch (BadLocationException ex) {
throw new Error(ex);
}
// highlight the token momentarily
final Timer timer = new Timer(200, new ActionListener() {
private int counter = 0;
private Object highlight = null;
@Override
public void actionPerformed(ActionEvent event) {
if (counter % 2 == 0) {
try {
highlight = editor.getHighlighter().addHighlight(token.start, token.end, highlightPainter);
} catch (BadLocationException ex) {
// don't care
}
} else if (highlight != null) {
editor.getHighlighter().removeHighlight(highlight);
}
if (counter++ > 6) {
Timer timer = (Timer) event.getSource();
timer.stop();
}
}
});
timer.start();
}
}
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