//
// PDFNet Copyright (c) 2001-2008 by PDFTron Systems Inc. All Rights Reserved.
//

using System;
using pdftron;
using pdftron.Common;
using pdftron.Filters;
using pdftron.SDF;
using pdftron.PDF;

namespace ElementReaderTestCS
{
	/// <summary>
	/// Summary description for Class1.
	/// </summary>
	class Class1
	{
        static void ProcessElements(ElementReader reader) 
        {
            Element element;
            while ((element = reader.Next()) != null) 	// Read page contents
            {
                switch (element.GetType())
                {
                    case Element.Type.e_path:						// Process path data...
                    {
                        double[] data = element.GetPathPoints();
                        int sz = element.GetPointCount();
						Console.WriteLine("Process Element.Type.e_path");
                        break; 
                    }
					case Element.Type.e_image: 
					case Element.Type.e_inline_image: 
					{
						// Process images...
						Console.WriteLine("Process Element.Type.e_image");
						break; 
					}
                    case Element.Type.e_text: 				// Process text strings...
                    {
						Console.WriteLine("Process Element.Type.e_text");

                        String txt = element.GetTextString();
                        // Console.WriteLine(txt);
                        break;
                    }
                    case Element.Type.e_form:				// Process form XObjects
                    {
						Console.WriteLine("Process Element.Type.e_form");
                        reader.FormBegin(); 
                        ProcessElements(reader);
                        reader.End(); 
                        break; 
                    }
                }
            }
        }

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main(string[] args)
		{
			PDFNet.Initialize();
			PDFNet.SetResourcesPath("../../../../../resources");

			// Relative path to the folder containing test files.
			string input_path =  "../../../../TestFiles/";
			// string output_path = "../../../../TestFiles/Output/";

			try
			{
				Console.WriteLine("-------------------------------------------------");
				Console.WriteLine("Extract text data from all pages in the document.");

				// Open the test file
				Console.WriteLine("Opening the input file...");
				PDFDoc doc = new PDFDoc(input_path + "newsletter.pdf");
				doc.InitSecurityHandler();				
				
				PageIterator itr;
				ElementReader page_reader = new ElementReader();

				for (itr = doc.GetPageIterator(); itr.HasNext(); itr.Next())		//  Read every page
				{				
					Console.WriteLine("Page {0:d} ----------------------------------------",
						itr.GetPageNumber());

					page_reader.Begin(itr.Current());
                    ProcessElements(page_reader);
                    page_reader.End();
				}

				Console.WriteLine("Done.");
				doc.Close();
			}
			catch (PDFNetException e)
			{
				Console.WriteLine(e.Message);
			}

			PDFNet.Terminate();
		}
	}
}