Java Code Examples for org.apache.pdfbox.cos.COSDictionary#removeItem()

/**
 * <a href="https://stackoverflow.com/questions/49048556/pdfbox-set-field-value-doesnt-work">
 * PDFBox set field value doesn't work
 * </a>
 * <br/>
 * <a href="https://www.inps.it/Nuovoportaleinps/image.aspx?iIDModulo=7712&tipomodulo=1">
 * SR16_ANF_DIP.pdf
 * </a>
 * <p>
 * Indeed, the form field in question is hidden. Thus, one has to un-hide it
 * to make it visible.
 * </p>
 */
@Test
public void testFillLikeBarbara() throws IOException
{
    try (   InputStream originalStream = getClass().getResourceAsStream("SR16_ANF_DIP.pdf") )
    {
        PDDocument pdfDocument = Loader.loadPDF(originalStream);
        PDAcroForm acroForm = pdfDocument.getDocumentCatalog().getAcroForm();

        if (acroForm != null)
        {
            PDTextField pdfField = (PDTextField) acroForm.getField("info_15a");
            pdfField.getWidgets().get(0).setHidden(false);// <===
            pdfField.setValue("xxxxxx");
        }

        pdfDocument.setAllSecurityToBeRemoved(true);
        COSDictionary dictionary = pdfDocument.getDocumentCatalog().getCOSObject();
        dictionary.removeItem(COSName.PERMS);

        pdfDocument.save(new File(RESULT_FOLDER, "SR16_ANF_DIP-filled.pdf"));
        pdfDocument.close();
    }
}
 

/**
 * This will write the trailer to the PDF document.
 *
 * @param doc The document to create the trailer for.
 *
 * @throws IOException If there is an IOError while writing the document.
 */
protected void doWriteTrailer(COSDocument doc) throws IOException
{
    getStandardOutput().write(TRAILER);
    getStandardOutput().writeEOL();

    COSDictionary trailer = doc.getTrailer();
    //sort xref, needed only if object keys not regenerated
    Collections.sort(getXRefEntries());
    COSWriterXRefEntry lastEntry = getXRefEntries().get( getXRefEntries().size()-1);
    trailer.setLong(COSName.SIZE, lastEntry.getKey().getNumber()+1);
    // Only need to stay, if an incremental update will be performed
    if (!incrementalUpdate) 
    {
      trailer.removeItem( COSName.PREV );
    }
    if (!doc.isXRefStream())
    {
        trailer.removeItem( COSName.XREF_STM );
    }
    // Remove a checksum if present
    trailer.removeItem( COSName.DOC_CHECKSUM );

    COSArray idArray = trailer.getCOSArray(COSName.ID);
    if (idArray != null)
    {
        idArray.setDirect(true);
    }

    trailer.accept(this);
}
 

private void cleanupFieldCOSDictionary(COSDictionary fieldCos)
{
    //TODO: align that list with the PDF spec. Vurrently only based on sample forms
    fieldCos.removeItem(COSName.F);
    fieldCos.removeItem(COSName.MK);
    fieldCos.removeItem(COSName.P);
    fieldCos.removeItem(COSName.RECT);
    fieldCos.removeItem(COSName.SUBTYPE);
    fieldCos.removeItem(COSName.TYPE);
}
 

private void cleanupWidgetCOSDictionary(COSDictionary widgetCos, boolean removeDAEntry)
{
    //TODO: align that list with the PDF spec. Vurrently only based on sample forms
    // Acrobat removes the DA entry only for the first widget
    if (removeDAEntry)
    {
        widgetCos.removeItem(COSName.DA);
    }
    widgetCos.removeItem(COSName.FT);
    widgetCos.removeItem(COSName.T);
    widgetCos.removeItem(COSName.V);
}
 

/**
 * <a href="https://stackoverflow.com/questions/45812696/pdfbox-delete-comment-maintain-strikethrough">
 * PDFBox delete comment maintain strikethrough
 * </a>
 * <br/>
 * <a href="https://expirebox.com/files/3d955e6df4ca5874c38dbf92fc43b5af.pdf">
 * only_fields.pdf
 * </a>
 * <a href="https://file.io/DTvqhC">
 * (alternative download)
 * </a>
 * <p>
 * The OP only wanted the comment removed, not the strike-through. Thus, we must
 * not remove the annotation but merely the comment building attributes.
 * </p>
 */
@Test
public void testRemoveLikeStephanImproved() throws IOException {
    final COSName POPUP = COSName.getPDFName("Popup");
    try (InputStream resource = getClass().getResourceAsStream("only_fields.pdf")) {
        PDDocument document = Loader.loadPDF(resource);
        List<PDAnnotation> annotations = new ArrayList<>();
        PDPageTree allPages = document.getDocumentCatalog().getPages();

        List<COSObjectable> objectsToRemove = new ArrayList<>();

        for (int i = 0; i < allPages.getCount(); i++) {
            PDPage page = allPages.get(i);
            annotations = page.getAnnotations();

            for (PDAnnotation annotation : annotations) {
                if ("StrikeOut".equals(annotation.getSubtype()))
                {
                    COSDictionary annotationDict = annotation.getCOSObject();
                    COSBase popup = annotationDict.getItem(POPUP);
                    annotationDict.removeItem(POPUP);
                    annotationDict.removeItem(COSName.CONTENTS); // plain text comment
                    annotationDict.removeItem(COSName.RC);       // rich text comment
                    annotationDict.removeItem(COSName.T);        // author

                    if (popup != null)
                        objectsToRemove.add(popup);
                }
            }

            annotations.removeAll(objectsToRemove);
        }

        document.save(new File(RESULT_FOLDER, "only_fields-removeImproved.pdf"));
    }
}
 

void removeToUnicodeMaps(PDResources pdResources) throws IOException
{
    COSDictionary resources = pdResources.getCOSObject();

    COSDictionary fonts = asDictionary(resources, COSName.FONT);
    if (fonts != null)
    {
        for (COSBase object : fonts.getValues())
        {
            while (object instanceof COSObject)
                object = ((COSObject)object).getObject();
            if (object instanceof COSDictionary)
            {
                COSDictionary font = (COSDictionary)object;
                font.removeItem(COSName.TO_UNICODE);
            }
        }
    }

    for (COSName name : pdResources.getXObjectNames())
    {
        PDXObject xobject = pdResources.getXObject(name);
        if (xobject instanceof PDFormXObject)
        {
            PDResources xobjectPdResources = ((PDFormXObject)xobject).getResources();
            removeToUnicodeMaps(xobjectPdResources);
        }
    }
}