1718245 - [XFA] Some text input fields are inaccessible

Status: VERIFIED FIXED

(Firefox :: PDF Viewer, defect, P1)

Description

[Daniel Bodea [:danibodea]]

Attachment: 551551e9-c2f8-466d-835b-24e72638a33a.pdf

Note

• When the user loads a specific PDF file in Adobe Reader and Firefox, he scrolls to page 11, section 13, subsection 13.1, and clicks inside the input boxes of fields named "Name of Issuer" or "Law governing the bonds", he will notice that the input fields are inaccessible.

Affected versions

• Nightly v91.0a1

Affected platforms

• all

Preconditions

• Flip the "pdfjs.enableXfa" pref to true.

Steps to reproduce

1. Launch browser.
2. Load the attached PDF file.
3. Scroll to pages 11, section 13, subsection 13.1.
4. Click inside the input boxes of fields named "Name of Issuer" or "Law governing the bonds".

Expected result

• The cursor appears and the user is able to input text.

Actual result

• The cursor does not appear and the user is NOT able to input text.

Regression range

• Not a regression, but an implementation fault.

Comment 1

[Daniel Bodea [:danibodea]]

Attachment: alignment of paragraphs.png

Comment 2

[Daniel Bodea [:danibodea]]

Attachment: input fields are not accessible.png

Correct demo.

Comment 3

[Marco Castelluccio [:marco]]

Could you check if this is due to JS or not?

Comment 4

[Calixte Denizet (:calixte)]

It's an implementation issue.
The field here has no ui so according to the spec:

If the UI element contains no children or is not present, the application chooses a default user interface for the 
container, based on the type of the container's content. 

So we should probably add a textfield by default.

Comment 5

[GitHub Bugzilla PR Linker]

Attachment: Link to GitHub pull-request: https://github.com/mozilla/pdf.js/pull/13778

Comment 6

[GitHub Bugzilla PR Linker]

Attachment: Link to GitHub master push: https://github.com/mozilla/pdf.js/commit/ead394debdb96c8bd6dce2df49e986f18196f7b6

Commit merged into master by GitHub
Authored by calixteman (calixteman)

Comment 7

[Daniel Bodea [:danibodea]]

I have verified the fix in Beva v91.0b9 and Nightly v92.0a1 from 2021-07-30.