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https://issues.apache.org/jira/browse/PDFBOX-5565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17702886#comment-17702886
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ASF subversion and git services commented on PDFBOX-5565:
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Commit 1908587 from Maruan Sahyoun in branch 'pdfbox/trunk'
[ https://svn.apache.org/r1908587 ]
PDFBOX-5565: check MaxLength entry when deciding for Comb field
> RFE: Comb flag warning
> ----------------------
>
> Key: PDFBOX-5565
> URL: https://issues.apache.org/jira/browse/PDFBOX-5565
> Project: PDFBox
> Issue Type: Improvement
> Components: AcroForm
> Affects Versions: 2.0.27
> Reporter: Jurgen Doll
> Assignee: Maruan Sahyoun
> Priority: Minor
> Fix For: 2.0.28, 3.0.0 PDFBox
>
>
> Currently if a PDF form text field has it's Comb flag set true but the max
> length hasn't been set then PDFBox silently ignores the field and doesn't
> render it.
> It would be helpful for PDFBox to at least issue a warning that the field
> cannot be rendered as a Comb due to this.
> It may be worth noting that if pdForm.setNeedAppearances is set true, and
> after setting fields pdForm.refreshAppearances() is invoked that Comb fields
> without max length specified do display in Acrobat and Edge. However without
> both of these conditions they also don't display, just like PDFBox currently.
> Perhaps worth considering aligning PDFBox to behave in a similar fashion
> then, and to still issue the warning.
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