[PDFBOX-4471] Different fields look alike if they have the same /AP/N before value change

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.0.13
• Component/s: AcroForm
• External issue URL: https://stackoverflow.com/questions/54820224/why-is-pdfbox-overwriting-multiple-fields-even-when-they-dont-match-the-fullyq
• Assignee: Unassigned
• Reporter: Tilman Hausherr
• Created: 23/Feb/19 10:22
• Updated: 01/Aug/19 16:54

Description

See attached SO answer - in the attached file, different fields point to the same /AP/N object. I think this could be fixed by changing AppearanceGeneratorHelper.setAppearanceValue() by removing the "if" segment in if (appearance != null && appearance.isStream()) and keep the "else" part only.

I'm wondering why we are reusing the existing appearance stream, is there are use case to this? I ran the tests after making the change and there was a difference but it was invisible.

Issue Links

• is related to: PDFBOX-4615 AppearanceGeneratorHelper.setAppearanceValue doesn't set the bounding box on the appearance stream correctly