Package net.pms.newgui

Source Code of net.pms.newgui.HelpTab

/*
* PS3 Media Server, for streaming any medias to your PS3.
* Copyright (C) 2008  A.Brochard
*
* This program is 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; version 2
* of the License only.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
package net.pms.newgui;

import com.jgoodies.forms.builder.PanelBuilder;
import com.jgoodies.forms.layout.CellConstraints;
import com.jgoodies.forms.layout.FormLayout;
import java.awt.Color;
import java.awt.Desktop;
import java.awt.Dimension;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import javax.swing.BorderFactory;
import javax.swing.JComponent;
import javax.swing.JEditorPane;
import javax.swing.JScrollPane;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import net.pms.PMS;
import net.pms.util.PropertiesUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
* Sets up the panel for the help tab and loads its contents from a file.
*/
public class HelpTab {
  private static final Logger LOGGER = LoggerFactory.getLogger(HelpTab.class);

  private JEditorPane editorPane;

  /**
   * Return the editor pane for the help tab containing the help contents.
   * @return The editor pane for the help tab
   */
  public JEditorPane getList() {
    return editorPane;
  }

  /**
   * Set up the panel for the help tab and load its contents from a file.
   * @return The component containing the help tab and its contents
   */
  public JComponent build() {
    FormLayout layout = new FormLayout(
      "left:pref, 0:grow",
      "pref, fill:default:grow"
    );
    PanelBuilder builder = new PanelBuilder(layout);
    builder.opaque(true);
    CellConstraints cc = new CellConstraints();
    editorPane = new JEditorPane();
    editorPane.setEditable(false);
    editorPane.setContentType("text/html");
    editorPane.setBackground(Color.WHITE);

    updateContents();

    // Enable internal anchor links
    editorPane.addHyperlinkListener(new HyperlinkListener() {
      @Override
      public void hyperlinkUpdate(HyperlinkEvent event) {
        try {
          if (event.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
            String urlString = event.getURL().toExternalForm();

            if (urlString.startsWith("http://") || urlString.startsWith("https://") || urlString.startsWith("ftp://")) {
              // Open external links in the desktop web browser
              URI uri = new URI(urlString);
              Desktop.getDesktop().browse(uri);
            } else {
              // Open anchor links in the editorPane
              editorPane.setPage(event.getURL());
            }
          }
        } catch (IOException | URISyntaxException e) {
          LOGGER.debug("Caught exception", e);
        }
      }
    });

    JScrollPane pane = new JScrollPane(editorPane, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    pane.setPreferredSize(new Dimension(500, 400));
    pane.setBorder(BorderFactory.createEmptyBorder());
    builder.add(pane, cc.xy(2, 2));

    return builder.getPanel();
  }

  /**
   * Load the current help page in the editor pane.
   */
  public void updateContents() {
    if (editorPane != null) {
      try {
        // Read the HTML help file
        String documentationDir = PropertiesUtil.getProjectProperties().get("project.documentation.dir");
        String helpPage = PMS.getHelpPage();
        File file = new File(documentationDir + "/" + helpPage);

        // Display the HTML help file in the editor
        editorPane.setPage(file.toURI().toURL());
      } catch (MalformedURLException e) {
        LOGGER.debug("Caught exception", e);
      } catch (IOException e) {
        LOGGER.debug("Caught exception", e);
      }
    }
  }
}
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