PDFPackage

1//
2// Copyright (c) 2001-2021 by PDFTron Systems Inc. All Rights Reserved.
3//
4using System;
5using pdftron;
6using pdftron.Common;
7using pdftron.Filters;
8using pdftron.SDF;
9using pdftron.PDF;
10
11using NUnit.Framework;
12
13namespace MiscellaneousSamples
14{
15	/// <summary>
16	/// This sample illustrates how to create, extract, and manipulate PDF Portfolios
17	/// (a.k.a. PDF Packages) using PDFNet SDK.
18	/// </summary>
19	[TestFixture]
20	public class PDFPackageTest
21	{
22		
23		// Relative path to the folder containing test files.
24		const string input_path =  "TestFiles/";
25
26		/// <summary>
27		/// The main entry point for the application.
28		/// </summary>
29		[Test]
30		public static void Sample()
31		{
32
33			// Create a PDF Package.
34			try
35			{
36				using (PDFDoc doc = new PDFDoc())
37				{
38					AddPackage(doc, Utils.GetAssetTempFile(input_path + "numbered.pdf"), "My File 1");
39					AddPackage(doc, Utils.GetAssetTempFile(input_path + "newsletter.pdf"), "My Newsletter...");
40					AddPackage(doc, Utils.GetAssetTempFile(input_path + "peppers.jpg"), "An image");
41					AddCovePage(doc);
42					doc.Save(Utils.CreateExternalFile("package.pdf"), SDFDoc.SaveOptions.e_linearized);
43                    Console.WriteLine("Done.");
44				}
45			}
46			catch (PDFNetException e)
47			{
48				Console.WriteLine(e.Message);
49				Assert.True(false);
50			}
51
52			// Extract parts from a PDF Package.
53			try
54			{
55				using (PDFDoc doc = new PDFDoc(Utils.CreateExternalFile("package.pdf")))
56				{
57					doc.InitSecurityHandler();
58
59					pdftron.SDF.NameTree files = NameTree.Find(doc, "EmbeddedFiles");
60					if(files.IsValid()) 
61					{ 
62						// Traverse the list of embedded files.
63						NameTreeIterator i = files.GetIterator();
64						for (int counter = 0; i.HasNext(); i.Next(), ++counter) 
65						{
66							string entry_name = i.Key().GetAsPDFText();
67							Console.WriteLine("Part: {0}", entry_name);
68							FileSpec file_spec = new FileSpec(i.Value());
69							Filter stm = file_spec.GetFileData();
70							if (stm!=null) 
71							{
72								string fname = "extract_" + counter.ToString() + System.IO.Path.GetExtension(entry_name);
73								stm.WriteToFile(Utils.CreateExternalFile(fname), false);
74							}
75						}
76					}
77				}
78
79				Console.WriteLine("Done.");
80			}
81			catch (PDFNetException e)
82			{
83				Console.WriteLine(e.Message);
84				Assert.True(false);
85			}
86		}
87
88		static void AddPackage(PDFDoc doc, string file, string desc) 
89		{
90			NameTree files = NameTree.Create(doc, "EmbeddedFiles");
91			FileSpec fs = FileSpec.Create(doc, file, true);
92			byte[] file1_name = System.Text.Encoding.UTF8.GetBytes(file);
93			files.Put(file1_name, fs.GetSDFObj());
94			fs.GetSDFObj().PutText("Desc", desc);
95
96			Obj collection = doc.GetRoot().FindObj("Collection");
97			if (collection == null) collection = doc.GetRoot().PutDict("Collection");
98
99			// You could here manipulate any entry in the Collection dictionary. 
100			// For example, the following line sets the tile mode for initial view mode
101			// Please refer to section '2.3.5 Collections' in PDF Reference for details.
102			collection.PutName("View", "T");
103		}
104
105		static void AddCovePage(PDFDoc doc) 
106		{
107			// Here we dynamically generate cover page (please see ElementBuilder 
108			// sample for more extensive coverage of PDF creation API).
109			Page page = doc.PageCreate(new Rect(0, 0, 200, 200));
110
111			using (ElementBuilder b = new ElementBuilder())
112			using (ElementWriter w = new ElementWriter())
113			{
114				w.Begin(page); 
115				Font font = Font.Create(doc, Font.StandardType1Font.e_helvetica);
116				w.WriteElement(b.CreateTextBegin(font, 12));
117				Element e = b.CreateTextRun("My PDF Collection");
118				e.SetTextMatrix(1, 0, 0, 1, 50, 96);
119				e.GetGState().SetFillColorSpace(ColorSpace.CreateDeviceRGB());
120				e.GetGState().SetFillColor(new ColorPt(1, 0, 0));
121				w.WriteElement(e);
122				w.WriteElement(b.CreateTextEnd());
123				w.End();
124				doc.PagePushBack(page);
125			}
126
127			// Alternatively we could import a PDF page from a template PDF document
128			// (for an example please see PDFPage sample project).
129			// ...
130		}
131	}
132}