1887784 - [UIA] Implement Level, PositionInSet and SizeOfSet properties

Status: RESOLVED FIXED

(Core :: Disability Access APIs, task)

Description

[James Teh [:Jamie]]

These properties allow us to expose all group position information.

Comment 1

[James Teh [:Jamie]]

Chromium doesn't implement HeadingLevel and the UIA documentation suggests Level can be used for headings. That leaves me wondering why there's a separate HeadingLevel property, but whatever. 🤷‍♂️

Comment 2

[James Teh [:Jamie]]

Attachment: Bug 1887784: Implement the UIA Level, PositionInSet and SizeOfSet properties.

Note that even though UIA has a dedicated HeadingLevel property, Chromium doesn't implement it and the documentation says the Level property can be used for headings as well.

Comment 3

[James Teh [:Jamie]]

As an interesting side note, there is no UIA control type for heading. That means that without the HeadingLevel property, there's no way to identify that an element is a heading without the text pattern. Still, we're going to need to support the text pattern anyway, so I think it makes sense to follow Chromium here. Just for the record, though, note that exposing the HeadingLevel property does allow Narrator to quick nav to headings, though I think it will prefer the text pattern once we have it.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/2c9358a602b9
Implement the UIA Level, PositionInSet and SizeOfSet properties. r=nlapre

Comment 5

[Aron Cseh]

https://hg.mozilla.org/mozilla-central/rev/2c9358a602b9