com.lowagie.text.pdf

Class PdfAnnotation.PdfImportedLink

java.lang.Object

com.lowagie.text.pdf.PdfAnnotation.PdfImportedLink

Enclosing class:

PdfAnnotation

public static class PdfAnnotation.PdfImportedLink
extends Object

This class processes links from imported pages so that they may be active. The following example code reads a group of files and places them all on the output PDF, four pages in a single page, keeping the links active.

 String[] files = new String[] {"input1.pdf", "input2.pdf"};
 String outputFile = "output.pdf";
 int firstPage=1;
 Document document = new Document();
 PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(outputFile));
 document.setPageSize(PageSize.A4);
 float W = PageSize.A4.getWidth() / 2;
 float H = PageSize.A4.getHeight() / 2;
 document.open();
 PdfContentByte cb = writer.getDirectContent();
 for (int i = 0; i < files.length; i++) {
    PdfReader currentReader = new PdfReader(files[i]);
    currentReader.consolidateNamedDestinations();
    for (int page = 1; page <= currentReader.getNumberOfPages(); page++) {
        PdfImportedPage importedPage = writer.getImportedPage(currentReader, page);
        float a = 0.5f;
        float e = (page % 2 == 0) ? W : 0;
        float f = (page % 4 == 1 || page % 4 == 2) ? H : 0;
        ArrayList links = currentReader.getLinks(page);
        cb.addTemplate(importedPage, a, 0, 0, a, e, f);
        for (int j = 0; j < links.size(); j++) {
            PdfAnnotation.PdfImportedLink link = (PdfAnnotation.PdfImportedLink)links.get(j);
            if (link.isInternal()) {
                int dPage = link.getDestinationPage();
                int newDestPage = (dPage-1)/4 + firstPage;
                float ee = (dPage % 2 == 0) ? W : 0;
                float ff = (dPage % 4 == 1 || dPage % 4 == 2) ? H : 0;
                link.setDestinationPage(newDestPage);
                link.transformDestination(a, 0, 0, a, ee, ff);
            }
            link.transformRect(a, 0, 0, a, e, f);
            writer.addAnnotation(link.createAnnotation(writer));
        }
        if (page % 4 == 0)
        document.newPage();
    }
    if (i < files.length - 1)
    document.newPage();
    firstPage += (currentReader.getNumberOfPages()+3)/4;
 }
 document.close();
 

Method Summary

Modifier and Type	Method and Description
PdfAnnotation	createAnnotation(PdfWriter writer)
int	getDestinationPage()
boolean	isInternal()
void	setDestinationPage(int newPage)
String	toString() Returns a String representation of the link.
void	transformDestination(float a, float b, float c, float d, float e, float f)
void	transformRect(float a, float b, float c, float d, float e, float f)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

isInternal

public boolean isInternal()

getDestinationPage

public int getDestinationPage()

setDestinationPage

public void setDestinationPage(int newPage)

transformDestination

public void transformDestination(float a,
                                 float b,
                                 float c,
                                 float d,
                                 float e,
                                 float f)

transformRect

public void transformRect(float a,
                          float b,
                          float c,
                          float d,
                          float e,
                          float f)

createAnnotation

public PdfAnnotation createAnnotation(PdfWriter writer)

toString

public String toString()

Returns a String representation of the link.

Overrides:

toString in class Object

Returns:

a String representation of the imported link

Since:

2.1.6