Christian Appl created PDFBOX-5546:
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Summary: Issue with the index based RadioButton value selection.
Key: PDFBOX-5546
URL: https://issues.apache.org/jira/browse/PDFBOX-5546
Project: PDFBox
Issue Type: Bug
Components: AcroForm
Affects Versions: 2.0.27
Reporter: Christian Appl
Attachments: WEBPDF-1616.patch
We encountered an issue with the index based selection of RadioButton values -
in case an "Opt" Array (Export value) definition is present.
*The issue: valid index selections are overwritten, when calling
"constructAppearances()"*
Location:
{color:#000000}org.apache.pdfbox.pdmodel.interactive.form.PDButton{color}:
When selecting an option via index - with activated "generateAppearances" flag
- via "setValue(int)": The value (V) of the RadioButton field and the
appearance states of it´s contained streams were updated accordingly and
correctly.
But when debugging I found that the following internal call to:
applyChanges->constructAppearances, would override the correct values with
erroneous ones that rather match the direct onState selection (without Opt
array).
Which lead to me implementing the hereby provided patch trying to address the
issue.
*Additonal observation: onValue name and index mismatch*
When setting the Value V of the containing RadioButton field the current
implementation assumed, that the name of the "onState" Stream would always
match the index of the child in the kids/Opt array.
I was able to create a document (using Adobe DC) that did contradict that
assumption. Adobe DC allows selecting custom names for the Acroform "onState"
names (and streams) in that case the index of the child may i.e. be 0, while
the name of the "onState" stream is "Choice1", but using "Choice1" as the "V"
value for the field will not lead to a valid/working result.
In this patch you will also find a solution, that attempts to address that
issue aswell.
*Tests:*
You will also find two tests in the patch, that summarize the behaviour I would
assume to be correct.
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