1564299 - Fission a11y: Reorder event not fired on iframe accessible after OOP iframe is loaded

Status: RESOLVED FIXED

(Core :: Disability Access APIs, defect)

Description

[James Teh [:Jamie]]

When opening a document with an OOP iframe, NVDA's virtual buffer sometimes doesn't include the content of the iframe once loaded. However, pressing NVDA+f5 to force refresh the buffer then shows the iframe's content as expected. I'm fairly sure this is because the iframe isn't firing a reorder event when the OOP DocAccessibleParent is added.

For same-process iframes, this gets handled by DocAccessible::DoInitialUpdate, since the iframe accessible is in the same process and is the parent of the document. This can't work for OOP iframes.

I think this event is going to need to be fired directly by the parent process, probably in DocAccessibleParent::AddChildDoc.

Comment 1

[James Teh [:Jamie]]

Attachment: Bug 1564299: Fire a reorder event on the outer doc accessible when an OOP document gets added.

For same-process iframe documents, this reorder event is fired by the content process.
This isn't possible when the document is in a different process to its embedder.
In this case, we need to fire it from the parent process when the embedded document accessible is added.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/bf25c3b58362
Fire a reorder event on the outer doc accessible when an OOP document gets added. r=yzen

Comment 3

[Oana Pop-Rus]

https://hg.mozilla.org/mozilla-central/rev/bf25c3b58362