Adding bookmarks for lists and list items

[manugbhat]

Unable to add bookmarks at list and list item level.

public class OPBookmarkBuilder extends PdfPageEventHelper {
    public void onParagraph(PdfWriter writer, Document document, float position) {
        PdfContentByte cb = writer.getDirectContent();
        PdfDestination destination = new PdfDestination(PdfDestination.FITH, position);
        new PdfOutline(cb.getRootOutline(), destination, "Para1-bookmark");
   }
}

And the consuming class,

public class PDFGenerator{
  public static void main(String[] args) {
            Document document = new Document();
            final PdfWriter instance = PdfWriter.getInstance(document, new FileOutputStream("testbm.pdf"));
            OPBookmarkBuilder bookmarkBuilder = new OPBookmarkBuilder();
            instance.setPageEvent(bookmarkBuilder);
            instance.setPageEvent(image);
            document.open();
           instance.setViewerPreferences(PdfWriter.PageModeUseOutlines);
          document.add(new Paragraph(....));
          List section = new Section();
          section.add(new ListItem("test1",...));
          section.add(new Table(..));
         //Add a dummy empty paragraph so that PDFOutline is added.
         document.add(new Paragraph("",...));
         section.add(new ListItem("test2",...));
         ..
         ..
         ..
        document.add(section);
        document.close();
 }
}

I am using Lists because chapters and sections are always rendered with numbered bullers. I dont need numbered bullets.
The problem here is that unless I add the list to the document, the position does not move and hence the adding the dummy paragraph is adding outlines at the same destination. In the generated pdf, on clicking the bookmarks it does not navigate to the corresponding the list item.

[mluppi]

@manugbhat
I have answered your question on StackOverflow: https://stackoverflow.com/a/68419054/5024726
Additionally, I'm adding a new example to the existing collection in PR #577

A short sample (see the example above or the answer on StackOverflow for details):

Document document = new Document(PageSize.A4);
PdfWriter instance = PdfWriter.getInstance(document, new FileOutputStream("out.pdf"));
instance.setViewerPreferences(PdfWriter.PageModeUseOutlines);
document.open();

List list = new List();
list.add(new ListItem(new Chunk("ABC").setLocalDestination("dest1")));
list.add(new ListItem(new Chunk("XYZ").setLocalDestination("dest2")));
document.add(list);

// add outline items
PdfOutline root = instance.getDirectContent().getRootOutline();
new PdfOutline(root, PdfAction.gotoLocalPage("dest1", false), "abc-item");
new PdfOutline(root, PdfAction.gotoLocalPage("dest2", false), "xyz-item");

document.close();