Example usage for org.apache.pdfbox.cos COSName PARENT

Introduction

In this page you can find the example usage for org.apache.pdfbox.cos COSName PARENT.

Prototype

COSName PARENT

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Usage

From source file:org.apache.fop.render.pdf.pdfbox.PDFBoxAdapter.java

License:Apache License

private void handleAnnotations(PDDocument sourceDoc, PDPage page, AffineTransform at) throws IOException {
    PDDocumentCatalog srcCatalog = sourceDoc.getDocumentCatalog();
    PDAcroForm srcAcroForm = srcCatalog.getAcroForm();
    List pageAnnotations = page.getAnnotations();
    if (srcAcroForm == null && pageAnnotations.isEmpty()) {
        return;//www .j a v a 2 s.  co  m
    }

    moveAnnotations(page, pageAnnotations, at);

    //Pseudo-cache the target page in place of the original source page.
    //This essentially replaces the original page reference with the target page.
    COSObject cosPage = null;
    COSDictionary parentDic = (COSDictionary) page.getCOSObject().getDictionaryObject(COSName.PARENT,
            COSName.P);
    COSArray kids = (COSArray) parentDic.getDictionaryObject(COSName.KIDS);
    for (int i = 0; i < kids.size(); i++) {
        //Hopefully safe to cast, as kids need to be indirect objects
        COSObject kid = (COSObject) kids.get(i);
        if (!pageNumbers.containsKey(i)) {
            PDFArray a = new PDFArray();
            a.add(null);
            pdfDoc.assignObjectNumber(a);
            pdfDoc.addTrailerObject(a);
            pageNumbers.put(i, a);
        }
        cacheClonedObject(kid, pageNumbers.get(i));
        if (kid.getObject() == page.getCOSObject()) {
            cosPage = kid;
        }
    }
    if (cosPage == null) {
        throw new IOException("Illegal PDF. Page not part of parent page node.");
    }

    Set<COSObject> fields = copyAnnotations(page);

    boolean formAlreadyCopied = getCachedClone(srcAcroForm) != null;
    PDFRoot catalog = this.pdfDoc.getRoot();
    PDFDictionary destAcroForm = (PDFDictionary) catalog.get(COSName.ACRO_FORM.getName());
    if (formAlreadyCopied) {
        //skip, already copied
    } else if (destAcroForm == null) {
        if (srcAcroForm != null) {
            //With this, only the first PDF's AcroForm is copied over. If later AcroForms have
            //different properties besides the actual fields, these get lost. Only fields
            //get merged.
            Collection exclude = Collections.singletonList(COSName.FIELDS);
            destAcroForm = (PDFDictionary) cloneForNewDocument(srcAcroForm, srcAcroForm, exclude);
        } else {
            //Work-around for incorrectly split PDFs which lack an AcroForm but have widgets
            //on pages. This doesn't handle the case where field dicts have "C" entries
            //(for the "CO" entry), so this may produce problems, but we have almost no chance
            //to guess the calculation order.
            destAcroForm = new PDFDictionary(pdfDoc.getRoot());
        }
        pdfDoc.registerObject(destAcroForm);
        catalog.put(COSName.ACRO_FORM.getName(), destAcroForm);
    }
    PDFArray clonedFields = (PDFArray) destAcroForm.get(COSName.FIELDS.getName());
    if (clonedFields == null) {
        clonedFields = new PDFArray();
        destAcroForm.put(COSName.FIELDS.getName(), clonedFields);
    }
    for (COSObject field : fields) {
        PDFDictionary clone = (PDFDictionary) cloneForNewDocument(field, field, Arrays.asList(COSName.KIDS));
        clonedFields.add(clone);
    }
}

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From source file:org.apache.fop.render.pdf.pdfbox.PDFBoxAdapter.java

License:Apache License

private Set<COSObject> copyAnnotations(PDPage page) throws IOException {
    COSArray annots = (COSArray) page.getCOSObject().getDictionaryObject(COSName.ANNOTS);
    Set<COSObject> fields = Collections.emptySet();
    if (annots != null) {
        fields = new TreeSet<COSObject>(new CompareFields());
        for (Object annot1 : annots) {
            Collection<COSName> exclude = new ArrayList<COSName>();
            exclude.add(COSName.P);//from   www  .j  a  va2  s.c om
            if (annot1 instanceof COSObject) {
                COSObject annot = (COSObject) annot1;
                COSObject fieldObject = annot;
                COSDictionary field = (COSDictionary) fieldObject.getObject();
                COSObject parent;
                while ((parent = (COSObject) field.getItem(COSName.PARENT)) != null) {
                    fieldObject = parent;
                    field = (COSDictionary) fieldObject.getObject();
                }
                fields.add(fieldObject);

                if (((COSDictionary) annot.getObject()).getItem(COSName.getPDFName("StructParent")) != null) {
                    exclude.add(COSName.PARENT);
                }
            }

            PDFObject clonedAnnot = (PDFObject) cloneForNewDocument(annot1, annot1, exclude);
            if (clonedAnnot instanceof PDFDictionary) {
                clonedAnnot.setParent(targetPage);
                updateAnnotationLink((PDFDictionary) clonedAnnot);
            }
            targetPage.addAnnotation(clonedAnnot);
        }
    }
    return fields;
}

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