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GUI classes for both stand-alone and LibreOffice/OpenOffice extension use
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/* LanguageTool, a natural language style checker 
 * Copyright (C) 2007 Daniel Naber (http://www.danielnaber.de)
 * 
 * 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 St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */
package org.languagetool.gui;

import java.awt.Color;
import java.awt.Component;
import java.awt.Desktop;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.util.ResourceBundle;
import java.util.TreeMap;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import org.languagetool.JLanguageTool;
import org.languagetool.Language;
import org.languagetool.Languages;
import org.languagetool.language.Contributor;

/**
 * A dialog with version and copyright information.
 * 
 * @author Daniel Naber
 */
public class AboutDialog {

  private final ResourceBundle messages;
  private final Component parent;

  public AboutDialog(final ResourceBundle messages, Component parent) {
    this.messages = messages;
    this.parent = parent;
  }

  public void show() {
    final String aboutText = Tools.getLabel(messages.getString("guiMenuAbout"));

    JTextPane aboutPane = new JTextPane();
    aboutPane.setBackground(new Color(0, 0, 0, 0));
    aboutPane.setBorder(BorderFactory.createEmptyBorder());
    aboutPane.setContentType("text/html");
    aboutPane.setEditable(false);
    aboutPane.setOpaque(false);

    aboutPane.setText(String.format(""
            + "LanguageTool %s (%s)
"
            + "Copyright (C) 2005-2015 the LanguageTool community and Daniel Naber
"
            + "This software is licensed under the GNU Lesser General Public License.
"
            + "http://www.languagetool.org
"
            + "Java max/total/free memory: %sMB, %sMB, %sMB"
            + "Maintainers of the language modules:

"
            + "", JLanguageTool.VERSION,
             JLanguageTool.BUILD_DATE,
             Runtime.getRuntime().maxMemory()/1024/1024,
             Runtime.getRuntime().totalMemory()/1024/1024,
             Runtime.getRuntime().freeMemory()/1024/1024));

    aboutPane.addHyperlinkListener(new HyperlinkListener() {
      @Override
      public void hyperlinkUpdate(HyperlinkEvent e) {
        if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
          if (Desktop.isDesktopSupported()) {
            try {
              Desktop.getDesktop().browse(e.getURL().toURI());
            } catch (Exception ex) {
              Tools.showError(ex);
            }
          }
        }
      }
    });

    JTextPane maintainersPane = new JTextPane();
    maintainersPane.setBackground(new Color(0, 0, 0, 0));
    maintainersPane.setBorder(BorderFactory.createEmptyBorder());
    maintainersPane.setContentType("text/html");
    maintainersPane.setEditable(false);
    maintainersPane.setOpaque(false);

    maintainersPane.setText(getMaintainers());

    int maxHeight = Toolkit.getDefaultToolkit().getScreenSize().height / 2;
    if(maintainersPane.getPreferredSize().height > maxHeight) {
      maintainersPane.setPreferredSize(
                new Dimension(maintainersPane.getPreferredSize().width, maxHeight));
    }

    JScrollPane scrollPane = new JScrollPane(maintainersPane);
    scrollPane.setBorder(BorderFactory.createEmptyBorder());
    JPanel panel = new JPanel();
    panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));
    panel.add(aboutPane);
    panel.add(scrollPane);

    JOptionPane.showMessageDialog(parent, panel,
        aboutText, JOptionPane.INFORMATION_MESSAGE);
  }

  private String getMaintainers() {
    final TreeMap list = new TreeMap<>();
    for (Language lang : Languages.get()) {
      if (!lang.isVariant()) {
        if (lang.getMaintainers() != null) {
          list.put(messages.getString(lang.getShortName()), lang);
        }
      }
    }
    final StringBuilder maintainersInfo = new StringBuilder();
    maintainersInfo.append("");
    for (String lang : list.keySet()) {
      maintainersInfo.append("");
      maintainersInfo.append("");
      maintainersInfo.append("");
    }
    maintainersInfo.append("");
      maintainersInfo.append(lang);
      maintainersInfo.append(":   ");
      int i = 0;
      Contributor[] maintainers = list.get(lang).getMaintainers();
      if (maintainers != null) {
        for (Contributor contributor : maintainers) {
          if (i > 0) {
            maintainersInfo.append(", ");
            if (i % 3 == 0) {
              maintainersInfo.append("
");
            }
          }
          maintainersInfo.append(contributor.getName());
          i++;
        }
      }
      maintainersInfo.append("");
    return maintainersInfo.toString();
  }

}