package com.melloware.jukes.gui.tool.help;
   
   import java.net.URL;
   
   import javax.swing.Icon;
   
   import com.jgoodies.uif.util.ResourceUtils;
   
   
  
  /**
   * Instances of this class define help nodes in the dynamic help.
   * A help node is either a chapter or topic, where only topics have
   * an attached URL.
   * <p>
   * Copyright (c) 1999-2007 Melloware, Inc. <http://www.melloware.com>
   * @author Emil A. Lefkof III <info@melloware.com>
   * @version 4.0
   */
  public final class HelpNode {
  
      public static final int CHAPTER_ITEM = 0;
      public static final int TOPIC_ITEM = 1;
  
      private static final String BOOK_ICON_ID = "com.jgoodies.help.openBook.icon";
  
      private static final String TOPIC_ICON_ID = "com.jgoodies.help.topic.icon";
  
      private static final Icon BOOK_ICON = ResourceUtils.getIcon(BOOK_ICON_ID);
  
      private static final Icon TOPIC_ICON = ResourceUtils.getIcon(TOPIC_ICON_ID);
      private final int type;
  
      private final String name;
      private final URL url;
  
      /**
       * Constructs a <code>HelpNode</code> with the given name, type, and URL.
       */
      private HelpNode(String name, int type, URL url) {
          this.name = name;
          this.type = type;
          this.url = url;
      }
  
      public Icon getIcon(boolean sel) {
          return isChapter() ? BOOK_ICON : TOPIC_ICON;
      }
  
      public URL getURL() {
          return url;
      }
  
      public boolean isChapter() {
          return type == CHAPTER_ITEM;
      }
  
      public String toString() {
          return name;
      }
  
      /**
       * Creates and returns a chapter help node with the given name.
       */
      static HelpNode createChapter(String name) {
          return new HelpNode(name, CHAPTER_ITEM, null);
      }
  
      /**
       * Creates and returns the help root node.
       */
      static HelpNode createRoot() {
          return createChapter("root");
      }
  
      /**
       * Creates and returns a topic help node with the given name and path.
       */
      static HelpNode createTopic(String name, String path) {
          URL url = ResourceUtils.getURL(path);
          return new HelpNode(name, TOPIC_ITEM, url);
      }
  
      boolean matches(URL aUrl) {
          return aUrl.equals(getURL());
      }
  
  }