source: stable/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/IO/HTML/HTMLExporter.cs

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Text;
using Netron.GraphLib.UI;
using System.Reflection;
namespace Netron.GraphLib.IO.HTML
{
  /// <summary>
  /// Exports a diagram to HTML
  /// includes the diagram as an image with an
  /// imagemap if there are URL's included on shapes.
  /// </summary>
  public class HTMLExporter
  {

    /// <summary>
    /// the graph control
    /// </summary>
    private GraphControl mSite;

    /// <summary>
    /// Default constructor
    /// </summary>
    /// <param name="site"></param>
    public HTMLExporter(GraphControl site)
    {
      mSite = site;
    }


    /// <summary>
    /// Creates the necessary files and directories for the export
    /// </summary>
    /// <param name="filePath"></param>
    private void CreateDirAndFiles(string filePath)
    {
      if(!Directory.Exists(Path.GetDirectoryName(filePath)))
      {
        Directory.CreateDirectory(Path.GetDirectoryName(filePath));
      }
      if(!Directory.Exists(Path.GetDirectoryName(filePath) + "\\images"))
      {
        Directory.CreateDirectory(Path.GetDirectoryName(filePath) + "\\images");
      }
      Stream stream=Assembly.GetExecutingAssembly().GetManifestResourceStream("Netron.GraphLib.Resources.Stripes.gif");
      Bitmap bmp= Bitmap.FromStream(stream) as Bitmap;
      bmp.Save(Path.GetDirectoryName(filePath) + "\\images\\Stripes.gif",ImageFormat.Gif);
      stream.Close();
      stream=null;
/*
      Stream stream=Assembly.GetExecutingAssembly().GetManifestResourceStream("Netron.GraphLib.Resources.GradLeft.jpg");
      Bitmap bmp= Bitmap.FromStream(stream) as Bitmap;
      bmp.Save(Path.GetDirectoryName(filePath) + "\\images\\GradLeft.jpg",ImageFormat.Jpeg);
      stream.Close();
      stream=null;

      stream=Assembly.GetExecutingAssembly().GetManifestResourceStream("Netron.GraphLib.Resources.GradTop.jpg");
      bmp= Bitmap.FromStream(stream) as Bitmap;
      bmp.Save(Path.GetDirectoryName(filePath) + "\\images\\GradTop.jpg",ImageFormat.Jpeg);
      stream.Close();
      stream=null;
*/
    }

    /// <summary>
    /// Creates the image-map for the clickable areas related to the URL on the shapes
    /// </summary>
    /// <returns></returns>
    private string GetURLMap()
    {
      StringBuilder sb = new StringBuilder();
      string template = @"<area shape=""rect"" coords=""{0},{1},{2},{3}"" href=""{4}"" target=""_blank"" title=""{4}"" >";
      foreach(Shape sh in mSite.Abstract.Shapes)
      {
        if(sh.URL!=string.Empty)
        {
          sb.AppendFormat(template,Convert.ToInt32(sh.Rectangle.Right-16),Convert.ToInt32(sh.Rectangle.Bottom-16),Convert.ToInt32(sh.Rectangle.Right), Convert.ToInt32(sh.Rectangle.Bottom),sh.URL);
        }
      }
      return sb.ToString();
    }

    /// <summary>
    /// Saves an HTML version of the diagram to the given file
    /// </summary>
    /// <param name="filePath">a path</param>
    public void SaveAs(string filePath)
    {
      CreateDirAndFiles(filePath);

      StreamWriter sw = null;
      try
      {
        GraphInformation info = mSite.Abstract.GraphInformation;
        Stream stream=Assembly.GetExecutingAssembly().GetManifestResourceStream("Netron.GraphLib.Resources.DefaultHTML.htm");
        StreamReader reader = new StreamReader(stream,System.Text.Encoding.ASCII);
        string template = reader.ReadToEnd();
        
        stream.Close();
        
        stream=null;

        sw = new StreamWriter(filePath);

        if(info.Title==string.Empty)
          template = template.Replace("$title$", "A Netron diagram");
        else
          template = template.Replace("$title$",info.Title);

        if(info.Description==string.Empty)
          template = template.Replace("$description$","Not set");
        else
          template = template.Replace("$description$",info.Description);
        
        if(info.Author==string.Empty)
          template = template.Replace("$author$", "Not set");
        else
          template = template.Replace("$author$",info.Author);

        if(info.Subject==string.Empty)
          template = template.Replace("$subject$", "Not set");
        else
          template = template.Replace("$subject$",info.Subject);
        
        template = template.Replace("$creationdate$",info.CreationDate);
        
        if(mSite.FileName==string.Empty)
          template = template.Replace("$filepath$", "Unsaved diagram");
        else
          template = template.Replace("$filepath$",mSite.FileName);

        string imagename = Path.ChangeExtension(Path.GetFileName(filePath),"jpg");

        mSite.SaveImage(Path.GetDirectoryName(filePath) + "\\images\\" + imagename, true);


        template = template.Replace("$imagepath$","images\\" + imagename);

        template = template.Replace("$urlmap$",GetURLMap());
        

        sw.Write(template);
        sw.Close();
      }
      catch(Exception exc)
      {
        mSite.OutputInfo(exc.Message,OutputInfoLevels.Exception);
        if(sw!=null) sw.Close();
      }
    }
  }
}