/**
  Title:       SiteMap Applet
  Version:     1.1
  Copyright:   Copyright (c) 1998
  Author:      Hubert A. Klein Ikkink
  Company:     DrBob42.com
  Description: Show hierarchical view of web site
 */
package com.drbob42.jbuilder.hubert.sitemap;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import com.sun.java.swing.*;
import java.beans.*;
import java.util.*;
import java.net.*;
import java.io.*;

import borland.jbcl.control.*;
import borland.jbcl.model.*;

import com.sun.java.swing.UIManager;

public class SiteMapApplet extends JApplet {
  private Vector links;
  
  boolean isStandalone = false;
  String pmTreeStyle;
  BorderLayout borderLayout1;
  TreeControl treeControl1;

//Get a parameter value

  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet

  public SiteMapApplet() {
  }

//Initialize the applet

  public void init() {
    try { pmTreeStyle = this.getParameter("treeStyle", "arrows"); } catch (Exception e) { e.printStackTrace(); }
    try { jbInit(); } catch (Exception e) { e.printStackTrace(); }

    loadTree();
    buildTree();

    treeControl1.setExpandByDefault(true);
    treeControl1.setSubfocus(treeControl1.getRoot());
    treeControl1.setEditInPlace(false);

    if (pmTreeStyle.equalsIgnoreCase("arrows"))
      treeControl1.setStyle(TreeControl.STYLE_ARROWS);
    else treeControl1.setStyle(TreeControl.STYLE_PLUSES);
  }

  static {
    try {
      UIManager.setLookAndFeel(new com.sun.java.swing.plaf.metal.MetalLookAndFeel());
      //UIManager.setLookAndFeel(new com.sun.java.swing.plaf.motif.MotifLookAndFeel());
      //UIManager.setLookAndFeel(new com.sun.java.swing.plaf.windows.WindowsLookAndFeel());
    }
    catch (Exception e) {}
  }

//Component initialization

  private void jbInit() throws Exception {
    borderLayout1 = (BorderLayout) Beans.instantiate(getClass().getClassLoader(), BorderLayout.class.getName());
    treeControl1 = (TreeControl) Beans.instantiate(getClass().getClassLoader(), TreeControl.class.getName());
    this.getContentPane().setLayout(borderLayout1);
    this.setSize(400,300);
    treeControl1.setOpaque(false);
    treeControl1.addActionListener(new SiteMapApplet_treeControl1_actionAdapter(this));
    this.getContentPane().add(treeControl1, BorderLayout.CENTER);
  }

//Load tree data

  private void loadTree() {
    // Load file from netwerk
    //
    String toc = null;
    try {
      URL tocURL = new URL(this.getDocumentBase(), "toc.txt");
      toc = readTOCFile(tocURL);
    } catch (MalformedURLException mfuex) {
      System.out.println("MalformedURLException in TOC file: " + mfuex);
    }

    // Parse resulting string
    //
    if (toc != null) {
      links = new Vector(5);
      StringTokenizer stok = new StringTokenizer(toc, "\r\n");
      while ( stok.hasMoreElements() ) {
        String tmp = (String) stok.nextElement();
        StringTokenizer node = new StringTokenizer(tmp, "|");
        String depth = (String) node.nextElement();
        String title = (String) node.nextElement();
        String url   = (String) node.nextElement();
        LinkInfo link = new LinkInfo(Integer.parseInt(depth), title, url);
        links.addElement(link);
      }
    }
  }

  private String readTOCFile(URL url) {
    StringBuffer result = new StringBuffer();
    try {
      BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
      String line;
      while ( (line = in.readLine()) != null ) {
        result.append(line);
        result.append("\r\n");
      }
      in.close();
    } catch (IOException ioex) {
      System.out.println("IOException : " + ioex);
    }
    return result.toString();
  }

// Build tree

  private void buildTree() {
    LinkInfo link = null;
    int depth     = 0;
    int lastDepth = 0;
    Hashtable roots = new Hashtable(5);
    for (Enumeration e=links.elements(); e.hasMoreElements(); ) {
      link = (LinkInfo) e.nextElement();
      depth = link.getDepth();
      if (depth == 1) {  // This is the root node
        GraphLocation root = treeControl1.setRoot(link.getTitle());
        roots.put(new Integer(depth), root);
        lastDepth = depth;
      } else if (depth > lastDepth) {  // Next child
        GraphLocation node = treeControl1.addChild(
          (GraphLocation) roots.get(new Integer(lastDepth)), link.getTitle());
        roots.put(new Integer(depth), node);
        lastDepth = depth;
      } else if (depth == lastDepth) {  // Sibling
        GraphLocation node = treeControl1.addChild(
          (GraphLocation) roots.get(new Integer(lastDepth-1)), link.getTitle());
        roots.remove(new Integer(depth));
        roots.put(new Integer(depth), node);
      } else if (depth < lastDepth) {  // Child to previous root
        GraphLocation node = treeControl1.addChild(
          (GraphLocation) roots.get(new Integer(depth-1)), link.getTitle());
        roots.remove(new Integer(depth));
        roots.put(new Integer(depth), node);
        lastDepth = depth;
      }
    }
  }


//Get Applet information

  public String getAppletInfo() {
    return
      "SiteMapApplet - Version 1.1 - Author: Hubert A. Klein Ikkink\r\n" +
      "Build with Borland JBuilder 2.0\r\n" +
      "Shows a hierarchy of pages on a website.";
  }

//Get parameter info

  public String[][] getParameterInfo() {
    String pinfo[][] =
    {
      {"treeStyle", "String", "Style of treeview"},
    };
    return pinfo;
  }

  void treeControl1_actionPerformed(ActionEvent e) {
    GraphLocation[] selections = treeControl1.getSelection().getAll();
    String title = (String) treeControl1.get(selections[0]);
    String url = null;
    LinkInfo tmp;
    for (Enumeration enum=links.elements(); enum.hasMoreElements(); ) {
      tmp = (LinkInfo)enum.nextElement();
      if (tmp.getTitle().equalsIgnoreCase(title)) {
        url = tmp.getURL();
        break;
      }
    }
    try {
      getAppletContext().showDocument(new URL(url));
    } catch (MalformedURLException mfuex) {}

  }

  class LinkInfo {
    // Properties
    //
    private String url;
    private String title;
    private int depth;

    // Constructors
    //
    public LinkInfo() {
      this(0, null, null);
    }

    public LinkInfo(int depth, String title, String url) {
      this.depth = depth;
      this.title = title;
      this.url   = url;
    }

    // Set methods for properties
    //
    public void setURL(String u) { url = u; }
    public void setTitle(String s) { title = s; }
    public void setDepth(int i) { depth = i; }

    // Get methods for properties
    //
    public String getURL() { return url; }
    public String getTitle() { return title; }
    public int getDepth() { return depth; }
  } //LinkInfo

}

class SiteMapApplet_treeControl1_actionAdapter implements java.awt.event.ActionListener {
  SiteMapApplet adaptee;

  
  SiteMapApplet_treeControl1_actionAdapter(SiteMapApplet adaptee) {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e) {
    adaptee.treeControl1_actionPerformed(e);
  }
}