Text Does Not Autofit While Editing

[lavlicekian]

I'm not sure if Autofit is the correct term, and haven't been able to find reports of this online. I'm guessing there's a setting I've missed somewhere.

Attach (recommended) or Link to PDF file here:
Direct_Deposit_Authorization_2019.pdf

Configuration:

• Web browser and its version: Firefox 104.0.2 (64-bit)
• Operating system and its version: Windows 11 Enterprise 21H2 22000.978
• PDF.js version: 2.15.303
• Is a browser extension: No

Steps to reproduce the problem:

1. When typing out the alphabet part of it will be cut off from view while editing the document in Firefox.
2. When typing out the alphabet in Chrome, Edge, and Brave, the text in the field will automatically shrink to keep the whole alphabet visible while editing.
3. The text is automatically scaled correctly when the document is printed to paper or PDF.

What is the expected behavior?

What went wrong?

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

[calixteman]

The field has a font where its size is zero which means that the font is auto-sized. From the specs:

A zero value for size means that the font shall be auto-sized: its size
shall be computed as a function of the height of the annotation rectangle.

which became in the last version:

A zero value for size means that the font
shall be auto-sized: its size shall be computed as an implementation dependent function.

Since Acrobat and Chrome are using both dimensions (i.e. width and height), I guess we should do the same.

[PailaGH]

@calixteman Do you have plans to implement this soon?

[calixteman]

Yep it's a WIP and it's working pretty well.
I just need identify possible corner cases and check how it behaves when printing/saving.

[PailaGH]

Great. Thank you.

[PailaGH]

@calixteman did you get a chance to work on this?