Feature request: Need APIs to access Acroform resources (Acroform->DR)

[panneer]

Hey @corymickelson

I first thank you for your great work (nopodofo).

I need a feature to access the acroform defined resources (Acroform->DR). Could you tell me whether you have a plan for this feature in your road map and when I could expect it?

I could not share the PDF sample for privacy reasons.

My actual use case
PDF is defined

1. With a Acroform dictionary as shown below

/CO: Array
/DA: /QuickPDFF6af2e376 0 Tf 0 0 0 rg
/DR: Dictionary
/Encoding: Dictionary
/Font: Dictionary
/Helv: 88 0 R
/QuickPDFF6af2e376: 158 0 R
/ZaDb: 89 0 R

2. With a form field as shown below

/DA: /QuickPDFF6af2e376 11 Tf 0 0 0 rg
/F: 4
/FT: /Tx
/Ff: 8388608
/P: 95 0 R
/Q: 0
/Rect: Array
/Subtype: /Widget
/T: F4260
/TU:
/Type: /Annot
/V:
I would like to add value to this form field (with appropriate appearance dictionary)
I followed this reference (https://corymickelson.github.io/NoPoDoFo/documentation/cookbook/ap.html) for adding appearance stream

When adding the appearance stream for field, I don't want to create a new font for field value.
Instead, I wish to get 'QuickPDFF6af2e376' font from Acroform->DR. Like the font accessing APIs defined in Document object

getFont(name: string): Font
listFonts(): { id: string, name: string }[]

I am not sure whether nopodofo already has functionality to achieve my requirement.
Please give me some advise to meet my requirement

Thanks a lot in advance

[corymickelson]

Thank you @panneer the form class has an accessor to the dictionary resource via

const dr = form.DR

This returns a NoPoDoFo.Dictionary. Do you have an example of this not working for you? I understand the use case around getting fonts from this resource, I will look into this, but in the interim please try the DR property of the Form class.

[panneer]

I initially tried form.DR accessor to get the info about the font details and it works. Thanks

Still for my requirement, I need to get the Acroform->DR defined font as NFont object, so that I can assign this font in painter instance when creating appearance stream for the value. For example,
{code}font = form.getFont('Helv')
...
const painter = new nopodofo.Painter(doc)
...
painter.setPage(xobj)
...
painter.font = font // font object fetched from Form.getFont() API
painter.beginText({x: 2, y: 2})
...{code}

Basic idea is to use the field DA defined font for the field values.

> Do you have an example of this not working for you?
Yes, I have attached the sample program (with a PDF sample). Hope it helps you.
Attachment: sample-program.zip

> I understand the use case around getting fonts from this resource, I will look into this
Thank you so much

> but in the interim please try the DR property of the Form class.
Meanwhile, I took the liberty to extend the nopodofo source for my requirement and do achieved my requirement to certain extent. Please check the changes I made and let me know your opinion.
Attachment: form-font-access-changes.zip

Thanks a lot in advance and wish you nice day