PDF/A

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;
11using pdftron.PDF;
12using pdftron.PDF.PDFA;
13using pdftron.SDF;
14
15using PDFNetUniversalSamples.ViewModels;
16
17namespace PDFNetSamples
18{
19    public sealed class PDFATest : Sample
20    {
21        public PDFATest() :
22            base("PDF/A", "This sample illustrates how to use PDF/A add-on to validate existing PDF documents for PDF/A compliance as well as to convert generic PDF documents to PDF/A format.")
23        {
24        }
25
26        public override IAsyncAction RunAsync()
27        {
28            return Task.Run(new System.Action(async () =>
29            {
30                WriteLine("--------------------------------");
31                WriteLine("Starting PDF/A Test...");
32                WriteLine("--------------------------------\n");
33			
34                PDFNet.SetColorManagement(CMSType.e_lcms);  // Required for PDFA validation.
35
36			    //-----------------------------------------------------------
37			    // Example 1: PDF/A Validation
38			    //-----------------------------------------------------------
39			    try
40			    {
41				    string filename = Path.Combine(InputPath, "newsletter.pdf");
42				    PDFACompliance pdf_a = new PDFACompliance(false, filename, "", PDFAComplianceConformance.e_Level1B, null, 10, false);
43				    PrintResults(pdf_a, filename);
44			    }
45			    catch (Exception e)
46			    {
47				    WriteLine(GetExceptionMessage(e));
48			    }
49
50			    //-----------------------------------------------------------
51			    // Example 2: PDF/A Conversion
52			    //-----------------------------------------------------------
53			    try
54			    {
55				    string filename = Path.Combine(InputPath, "fish.pdf");
56                    PDFACompliance pdf_a = new PDFACompliance(true, filename, "", PDFAComplianceConformance.e_Level1B, null, 10, false);
57				    filename = Path.Combine(OutputPath, "pdfa.pdf");
58				    pdf_a.SaveAs(filename, true);
59                    WriteLine("Saved PDF/A converted doc to" + filename);
60                    await AddFileToOutputList(filename).ConfigureAwait(false);
61
62				    // Re-validate the document after the conversion...
63				    pdf_a = new PDFACompliance(false, filename, "", PDFAComplianceConformance.e_Level1B, null, 10, false);
64				    PrintResults(pdf_a, filename);				
65			    }
66			    catch (Exception e)
67			    {
68				    WriteLine(GetExceptionMessage(e));
69                }
70
71                WriteLine("\n--------------------------------");
72                WriteLine("Done PDF/A Test.");
73                WriteLine("--------------------------------\n");
74            })).AsAsyncAction();
75		}
76
77        void PrintResults(PDFACompliance pdf_a, String filename) 
78		{
79			int err_cnt = pdf_a.GetErrorCount();
80			if (err_cnt == 0) 
81			{
82                WriteLine(string.Format("{0}: OK.", filename));
83			}
84			else 
85			{
86                WriteLine(string.Format("{0} is NOT a valid PDFA.", filename));
87				for (int i=0; i<err_cnt; ++i) 
88				{
89					PDFAComplianceErrorCode c = pdf_a.GetError(i);
90					WriteLine(string.Format(" - e_PDFA{0}: {1}.", c, PDFACompliance.GetPDFAErrorMessage(c)));
91
92					if (true) 
93					{
94						int num_refs = pdf_a.GetRefObjCount(c);
95						if (num_refs > 0)  
96						{
97							Write("   Objects:");
98							for (int j=0; j<num_refs; ) 
99							{
100                                Write(string.Format("{0}", pdf_a.GetRefObj(c, j)));
101                                if (++j != num_refs) Write(", ");
102							}
103                            WriteLine("");
104						}
105					}
106				}
107			}
108		}
109	}
110}