PDFPackage

1//---------------------------------------------------------------------------------------
2// Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
3// Consult legal.txt regarding legal and license information.
4//---------------------------------------------------------------------------------------
5
6package com.pdftron.android.pdfnetsdksamples.samples;
7
8import com.pdftron.android.pdfnetsdksamples.OutputListener;
9import com.pdftron.android.pdfnetsdksamples.PDFNetSample;
10import com.pdftron.android.pdfnetsdksamples.R;
11import com.pdftron.android.pdfnetsdksamples.util.Utils;
12import com.pdftron.common.PDFNetException;
13import com.pdftron.filters.Filter;
14import com.pdftron.pdf.ColorPt;
15import com.pdftron.pdf.ColorSpace;
16import com.pdftron.pdf.Element;
17import com.pdftron.pdf.ElementBuilder;
18import com.pdftron.pdf.ElementWriter;
19import com.pdftron.pdf.FileSpec;
20import com.pdftron.pdf.Font;
21import com.pdftron.pdf.PDFDoc;
22import com.pdftron.pdf.Page;
23import com.pdftron.pdf.Rect;
24import com.pdftron.sdf.NameTree;
25import com.pdftron.sdf.NameTreeIterator;
26import com.pdftron.sdf.Obj;
27import com.pdftron.sdf.SDFDoc;
28
29import java.util.ArrayList;
30
31//-----------------------------------------------------------------------------------
32//This sample illustrates how to create, extract, and manipulate PDF Portfolios
33//(a.k.a. PDF Packages) using PDFNet SDK.
34//-----------------------------------------------------------------------------------
35
36public class PDFPackageTest extends PDFNetSample {
37
38	private static OutputListener mOutputListener;
39
40	private static ArrayList<String> mFileList = new ArrayList<>();
41
42    public PDFPackageTest() {
43        setTitle(R.string.sample_pdfpackage_title);
44        setDescription(R.string.sample_pdfpackage_description);
45    }
46
47	@Override
48	public void run(OutputListener outputListener) {
49		super.run(outputListener);
50		mOutputListener = outputListener;
51		mFileList.clear();
52		printHeader(outputListener);
53
54        // Create a PDF Package.
55        try (PDFDoc doc = new PDFDoc()) {
56            
57            addPackage(doc, Utils.getAssetTempFile(INPUT_PATH + "numbered.pdf").getAbsolutePath(), "My File 1");
58            addPackage(doc, Utils.getAssetTempFile(INPUT_PATH + "newsletter.pdf").getAbsolutePath(), "My Newsletter...");
59            addPackage(doc, Utils.getAssetTempFile(INPUT_PATH + "peppers.jpg").getAbsolutePath(), "An image");
60            addCoverPage(doc);
61            doc.save(Utils.createExternalFile("package.pdf", mFileList).getAbsolutePath(), SDFDoc.SaveMode.LINEARIZED, null);
62            mOutputListener.println("Done.");			
63        } catch (Exception e) {
64            mOutputListener.printError(e.getStackTrace());
65        }
66
67        // Extract parts from a PDF Package.
68        try (PDFDoc doc = new PDFDoc(Utils.createExternalFile("package.pdf", mFileList).getAbsolutePath())) {
69            doc.initSecurityHandler();
70
71            com.pdftron.sdf.NameTree files = NameTree.find(doc.getSDFDoc(), "EmbeddedFiles");
72            if (files.isValid()) {
73                // Traverse the list of embedded files.
74                NameTreeIterator i = files.getIterator();
75                for (int counter = 0; i.hasNext(); i.next(), ++counter) {
76                    String entry_name = i.key().getAsPDFText();
77                    mOutputListener.println("Part: " + entry_name);
78
79                    FileSpec file_spec = new FileSpec(i.value());
80                    Filter stm = file_spec.getFileData();
81                    if (stm != null) {
82                        String ext = "pdf";
83                        if (entry_name.lastIndexOf('.') > 0) {
84                            ext = entry_name.substring(entry_name.lastIndexOf('.')+1);
85                        }
86                        String fname = "extract_" + counter + "." + ext;
87                        stm.writeToFile(Utils.createExternalFile(fname, mFileList).getAbsolutePath(), false);
88                    }
89                }
90            }
91            mOutputListener.println("Done.");
92        } catch (Exception e) {
93            mOutputListener.printError(e.getStackTrace());
94        }
95
96		for (String file : mFileList) {
97			addToFileList(file);
98		}
99		printFooter(outputListener);
100	}
101
102    static void addPackage(PDFDoc doc, String file, String desc) throws PDFNetException {
103        NameTree files = NameTree.create(doc.getSDFDoc(), "EmbeddedFiles");
104        FileSpec fs = FileSpec.create(doc, file, true);
105        files.put(file.getBytes(), fs.getSDFObj());
106        fs.getSDFObj().putText("Desc", desc);
107
108        Obj collection = doc.getRoot().findObj("Collection");
109        if (collection == null) collection = doc.getRoot().putDict("Collection");
110
111        // You could here manipulate any entry in the Collection dictionary.
112        // For example, the following line sets the tile mode for initial view mode
113        // Please refer to section '2.3.5 Collections' in PDF Reference for details.
114        collection.putName("View", "T");
115    }
116
117    static void addCoverPage(PDFDoc doc) throws PDFNetException {
118        // Here we dynamically generate cover page (please see ElementBuilder
119        // sample for more extensive coverage of PDF creation API).
120        Page page = doc.pageCreate(new Rect(0, 0, 200, 200));
121
122        ElementBuilder b = new ElementBuilder();
123        ElementWriter w = new ElementWriter();
124        w.begin(page);
125        Font font = Font.create(doc.getSDFDoc(), Font.e_helvetica);
126        w.writeElement(b.createTextBegin(font, 12));
127        Element e = b.createTextRun("My PDF Collection");
128        e.setTextMatrix(1, 0, 0, 1, 50, 96);
129        e.getGState().setFillColorSpace(ColorSpace.createDeviceRGB());
130        e.getGState().setFillColor(new ColorPt(1, 0, 0));
131        w.writeElement(e);
132        w.writeElement(b.createTextEnd());
133        w.end();
134        doc.pagePushBack(page);
135
136        // Alternatively we could import a PDF page from a template PDF document
137        // (for an example please see PDFPage sample project).
138        // ...
139    }
140
141}