DocumentCloud not properly processing PDF annotations #155

duckduckgrayduck · 2023-08-18T19:29:25Z

Summary of the problem

PDFium is not properly picking up on some PDF annotations, instead dropping them which ends up removing content from the document upload.

StackOverflow users suggested two possible fixes:

In PDFium there is an FPDF_ANNOT flag that can be passed to the various FPDF_RenderPage* methods. It's possible the PDFiumViewer code provides the same flag somewhere.

or

doc = PDDocument.load(FilePath);
PDPage page = (PDPage)doc.getDocumentCatalog().getAllPages().get(pageNum);
int rotPD = page.findRotation();
PDRectangle pageBound = page.findCropBox();
PDRectangle rect = ModifyRectAccordingToRotation(rectangle, rotPD, pageBound);
PDAnnotationLink txtLink = new PDAnnotationLink();
    PDBorderStyleDictionary borderULine = new PDBorderStyleDictionary();
                    borderULine.setStyle(PDBorderStyleDictionary.STYLE_UNDERLINE);
borderULine.setWidth(0);
txtLink.setBorderStyle(borderULine);
PDActionRemoteGoTo remoteGoto = new PDActionRemoteGoTo();
PDComplexFileSpecification fileDesc = new PDComplexFileSpecification();
fileDesc.setFile(System.IO.Path.GetFileName(path));
remoteGoto.setOpenInNewWindow(true);
remoteGoto.setFile(fileDesc);
txtLink.setAction(remoteGoto);
txtLink.setRectangle(rect);
page.getAnnotations().add(txtLink);