Cut and paste content in a page

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2020 iText Group NV
    Authors: iText Software.
 
    For more information, please contact iText Software at this address:
    sales@itextpdf.com
 */
/**
 * Example written by Bruno Lowagie.
 * http://stackoverflow.com/questions/28368317/itext-or-itextsharp-move-text-in-an-existing-pdf
 */
package com.itextpdf.samples.sandbox.merge;
 
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfReader;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
 
import java.io.File;
import java.io.IOException;
 
public class CutAndPaste {
    public static final String DEST = "./target/sandbox/merge/page229_cut_paste.pdf";
 
    public static final String SRC = "./src/test/resources/pdfs/page229.pdf";
 
    public static void main(String[] args) throws IOException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
 
        new CutAndPaste().manipulatePdf(DEST);
    }
 
    protected void manipulatePdf(String dest) throws IOException {
        PdfDocument srcDoc = new PdfDocument(new PdfReader(SRC));
        Rectangle pageSize = srcDoc.getFirstPage().getPageSize();
        PdfDocument resultPdfDoc = new PdfDocument(new PdfWriter(dest));
        resultPdfDoc.setDefaultPageSize(new PageSize(pageSize));
        resultPdfDoc.addNewPage();
 
        PdfFormXObject pageXObject = srcDoc.getFirstPage().copyAsFormXObject(resultPdfDoc);
        Rectangle toMove = new Rectangle(100, 500, 100, 100);
 
        // Create a formXObject of a page content, in which the area to move is cut.
        PdfFormXObject formXObject1 = new PdfFormXObject(pageSize);
        PdfCanvas canvas1 = new PdfCanvas(formXObject1, resultPdfDoc);
        canvas1.rectangle(0, 0, pageSize.getWidth(), pageSize.getHeight());
        canvas1.rectangle(toMove);
 
        // This method uses the even-odd rule to determine which regions lie inside the clipping path.
        canvas1.eoClip();
        canvas1.endPath();
        canvas1.addXObject(pageXObject, 0, 0);
 
        // Create a formXObject of the area to move.
        PdfFormXObject formXObject2 = new PdfFormXObject(pageSize);
        PdfCanvas canvas2 = new PdfCanvas(formXObject2, resultPdfDoc);
        canvas2.rectangle(toMove);
 
        // This method uses the nonzero winding rule to determine which regions lie inside the clipping path.
        canvas2.clip();
        canvas2.endPath();
        canvas2.addXObject(pageXObject, 0, 0);
 
        PdfCanvas canvas = new PdfCanvas(resultPdfDoc.getFirstPage());
        canvas.addXObject(formXObject1, 0, 0);
 
        // Add the area to move content, shifted 10 points to the left and 2 points to the bottom.
        canvas.addXObject(formXObject2, -20, -2);
 
        srcDoc.close();
        resultPdfDoc.close();
    }
}