2014080 - PDF Viewer does not treat row headings in tables in PDF as headings

Status: VERIFIED FIXED

(Firefox :: PDF Viewer, defect, P1)

Description

[Andrew LD]

Attachment: sample-table.pdf

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Steps to reproduce:

Open a correctly tagged PDF containing a table in Firefox PDF Viewer;
Use NVDA screen reader to navigate the table by moving along rows and up/down columns.

Actual results:

Each column heading is presented when moving along a row to its associated cell;
Row headings are not presented when moving down a column.

Expected results:

Both column and row headings should be presented along with their associated cells.

Comment 1

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Firefox::PDF Viewer' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Calixte Denizet (:calixte)]

It's because we treat the TH as a column header even when it's in a row.

Comment 3

[BMO Github Automation]

Attachment: [mozilla/pdf.js] In tagged pdfs, TH can be either a column header or a row header (bug 2014080) (#20623)

Comment 4

[Monica Chiorean (OOO August 21st 5:30PM)]

Reproduce the issue on Win11x64 using Firefox build 148.0.2.
Verified that row heading is read on Win11x64 using Firefox build 150.0a1 and 149.0b8.