1735953 - Temporary hacks to get NVDA virtual buffers rendering from the cache

Status: RESOLVED FIXED

(Core :: Disability Access APIs, task)

Description

[James Teh [:Jamie]]

NVDA currently won't render a buffer with the cache enabled because:

1. IAccessible2::states returns an error, so NVDA assumes our Accessibles are defunct.
2. IAccessible::accState on documents doesn't return the read-only state, so NVDA doesn't treat them as browseable documents.

This will get solved properly by state caching. It'd be useful to be able to test NVDA buffers in the interim, which we can do by landing some very simple hacks to be removed once state caching is done.

Comment 1

[James Teh [:Jamie]]

Attachment: Bug 1735953: Temporary a11y state hacks to get NVDA to render virtual buffers for cached documents.

1. Don't return an error from IAccessible2::states. Otherwise, NVDA assumes the Accessible is defunct.
2. Return STATE_SYSTEM_READONLY for all documents in IAccessible::get_accState. Otherwise, NVDA doesn't treat the document as browseable.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/dad723b8fd70
Temporary a11y state hacks to get NVDA to render virtual buffers for cached documents. r=morgan

Comment 3

[Marian-Vasile Laza]

https://hg.mozilla.org/mozilla-central/rev/dad723b8fd70