PDFPackage

1//
2// Copyright (c) 2001-2020 by PDFTron Systems Inc. All Rights Reserved.
3//
4
5using System;
6using System.IO;
7using System.Threading.Tasks;
8using Windows.Foundation;
9
10using pdftron.Filters;
11using pdftron.PDF;
12using pdftron.SDF;
13
14using PDFNetUniversalSamples.ViewModels;
15
16namespace PDFNetSamples
17{
18    public sealed class PDFPackageTest : Sample
19    {
20        public PDFPackageTest() :
21            base("PDFPackage", "This sample illustrates how to create, extract, and manipulate PDF Portfolios (a.k.a. PDF Packages) using PDFNet SDK.")
22        {
23        }
24
25        public override IAsyncAction RunAsync()
26        {
27            return Task.Run(new System.Action(async () => {
28                WriteLine("--------------------------------");
29                WriteLine("Starting PDFPackage Test...");
30                WriteLine("--------------------------------\n");
31			    try
32			    {
33
34				    PDFDoc doc = new PDFDoc();
35				    AddPackage(doc, Path.Combine(InputPath, "numbered.pdf"), "My File 1");
36				    AddPackage(doc, Path.Combine(InputPath, "newsletter.pdf"), "My Newsletter...");
37				    AddPackage(doc, Path.Combine(InputPath, "peppers.jpg"), "An image");
38				    AddCovePage(doc);
39                    string output_file_path = Path.Combine(OutputPath, "package.pdf");
40                    await doc.SaveAsync(output_file_path, SDFDocSaveOptions.e_linearized);
41                    WriteLine(string.Format("PDFPackage created at: {0}{1}", output_file_path, Environment.NewLine));
42                    await AddFileToOutputList(output_file_path).ConfigureAwait(false);
43
44				    doc.Destroy();
45			    }
46			    catch (Exception e)
47			    {
48				    WriteLine(e.Message);
49			    }
50
51			    // Extract parts from a PDF Package.
52			    {
53                    PDFDoc doc = new PDFDoc(Path.Combine(OutputPath, "package.pdf"));
54				    doc.InitSecurityHandler();
55
56				    pdftron.SDF.NameTree files = NameTree.Find(doc.GetSDFDoc(), "EmbeddedFiles");
57				    if(files.IsValid()) 
58				    {
59
60                        WriteLine(string.Format("Extracting files from {0}:", Path.Combine(OutputPath, "package.pdf")));
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                            WriteLine(string.Format("Part: {0}", entry_name));
68						    FileSpec file_spec = new FileSpec(i.Value());
69						    IFilter stm = file_spec.GetFileData();
70
71						    if (stm!=null) 
72						    {
73                                string fname = Path.Combine(OutputPath, "extract_" + counter.ToString() + entry_name.Substring(entry_name.Length - 4));
74                                stm.WriteToFile(fname, false);
75                                WriteLine(string.Format("File {0} extracted from package", fname));
76                                await AddFileToOutputList(fname).ConfigureAwait(false);
77						    }
78					    }
79				    }
80                }
81
82            WriteLine("\n--------------------------------");
83            WriteLine("Done Annotation Test.");
84            WriteLine("--------------------------------\n");
85            })).AsAsyncAction();
86		}
87
88		void AddPackage(PDFDoc doc, string file, string desc) 
89		{
90			NameTree files = NameTree.Create(doc.GetSDFDoc(), "EmbeddedFiles");
91            FileSpec fs = FileSpec.Create(doc.GetSDFDoc(), 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        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            pdftron.PDF.Page page = doc.PageCreate(new pdftron.PDF.Rect(0, 0, 200, 200));
110
111			ElementBuilder b = new ElementBuilder();
112			ElementWriter w = new ElementWriter();
113			w.Begin(page);
114			//Font font = Font.CreateTrueTypeFont(doc.GetSDFDoc(), new System.Drawing.Font("Comic Sans MS", 12), true, false);
115            Font font = Font.Create(doc, pdftron.PDF.FontStandardType1Font.e_times_roman);
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			// Alternatively we could import a PDF page from a template PDF document
127			// (for an example please see PDFPage sample project).
128			// ...
129		}
130	}
131}