Maruan Sahyoun created PDFBOX-6178:
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Summary: PdfBox renames RadioButton with Umlaut
Key: PDFBOX-6178
URL: https://issues.apache.org/jira/browse/PDFBOX-6178
Project: PDFBox
Issue Type: Bug
Components: AcroForm
Reporter: Maruan Sahyoun
>From the users mailing list:
1. Create a document that contains a radio button with Umlaut in name. I can
give you an example document.
Let's say: A radio group "Geschlecht" with the buttons "männlich" and
"weiblich".
Do not use PdfBox for this step. I used Acrobat Pro 2020.
The name/value of the "männlich" button is encoded as "/m#e4nnlich" in the PDF.
2. Update the value of the radio group with PdfBox to "männlich" and save it to
a new document.
{code}
import java.io.File;
import org.apache.pdfbox.Loader;
import org.apache.pdfbox.pdmodel.PDDocument;
public class UpdateRadioGroup {
private static final String INPUT_FILE = "form_empty.pdf";
private static final String OUTPUT_FILE = "form_selected.pdf";
private static final String FIELD_NAME = "Geschlecht";
private static final String FIELD_VALUE = "männlich";
public static void main(String[] args) throws Exception {
try (PDDocument document = Loader.loadPDF(new File(INPUT_FILE))) {
document.getDocumentCatalog()
.getAcroForm(null)
.getField(FIELD_NAME)
.setValue(FIELD_VALUE);
document.save(new File(OUTPUT_FILE));
}
}
}
{code}
3. Validate the name/value of the "männlich" button in the new document in a
text editor. PdfBox encodes "männlich" to "/m#c3#a4nnlich" (see
COSName.writePDF() ).
The Problem
===============
PdfBox renames the radio button from "männlich" to "männlich". Or
"/m#e4nnlich" to "/m#c3#a4nnlich" in PDF-format.
When you read the document again, PdfBox converts "#c3#a" to "ä" but
all other programs do not. I tested Acrobat Pro 2020, actual Acrobat
Reader, PDFXplorer from https://www.o2sol.com
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