protected void processOtherNode(final RenderNode node) {
   if (isValidDrawTarget(node)) {
     if (bounds == null) {
       bounds = new StrictBounds(node.getX(), node.getY(), node.getWidth(), node.getHeight());
     } else {
       bounds.add(node.getX(), node.getY(), node.getWidth(), node.getHeight());
     }
   }
 }
  protected void drawHyperlink(
      final RenderNode box, final String target, final String window, final String title) {
    if (box.isNodeVisible(getDrawArea()) == false) {
      return;
    }

    final PdfAction action = createActionForLink(target);

    final AffineTransform affineTransform = getGraphics().getTransform();
    final float translateX = (float) affineTransform.getTranslateX();

    final float leftX = translateX + (float) (StrictGeomUtility.toExternalValue(box.getX()));
    final float rightX =
        translateX + (float) (StrictGeomUtility.toExternalValue(box.getX() + box.getWidth()));
    final float lowerY =
        (float) (globalHeight - StrictGeomUtility.toExternalValue(box.getY() + box.getHeight()));
    final float upperY = (float) (globalHeight - StrictGeomUtility.toExternalValue(box.getY()));

    if (action != null) {
      final PdfAnnotation annotation =
          new PdfAnnotation(writer, leftX, lowerY, rightX, upperY, action);
      writer.addAnnotation(annotation);
    } else if (StringUtils.isEmpty(title) == false) {
      final Rectangle rect = new Rectangle(leftX, lowerY, rightX, upperY);
      final PdfAnnotation commentAnnotation =
          PdfAnnotation.createText(writer, rect, "Tooltip", title, false, null);
      commentAnnotation.setAppearance(
          PdfAnnotation.APPEARANCE_NORMAL,
          writer.getDirectContent().createAppearance(rect.getWidth(), rect.getHeight()));
      writer.addAnnotation(commentAnnotation);
    }
  }
  protected boolean drawPdfScript(final RenderNode box) {
    final Object attribute =
        box.getAttributes()
            .getAttribute(AttributeNames.Pdf.NAMESPACE, AttributeNames.Pdf.SCRIPT_ACTION);
    if (attribute == null) {
      return false;
    }

    final String attributeText = String.valueOf(attribute);
    final PdfAction action = PdfAction.javaScript(attributeText, writer, false);

    final AffineTransform affineTransform = getGraphics().getTransform();
    final float translateX = (float) affineTransform.getTranslateX();

    final float leftX = translateX + (float) (StrictGeomUtility.toExternalValue(box.getX()));
    final float rightX =
        translateX + (float) (StrictGeomUtility.toExternalValue(box.getX() + box.getWidth()));
    final float lowerY =
        (float) (globalHeight - StrictGeomUtility.toExternalValue(box.getY() + box.getHeight()));
    final float upperY = (float) (globalHeight - StrictGeomUtility.toExternalValue(box.getY()));
    final PdfAnnotation annotation =
        new PdfAnnotation(writer, leftX, lowerY, rightX, upperY, action);
    writer.addAnnotation(annotation);
    return true;
  }