Package 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 Details

    • 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