There are new "non-manual" WPT accname tests that we now mostly pass,
which required a few tweeks in calculating role and name.
Also implemented accessible description computation, which is just a
small addition on top of accessible name, and passed respective wpt
tests.
References #18332.
According to the spec, such controls should use the native value as long
as they have "aria-label". The relevant spec section is 2D.
However, there is an open issue that claims this should always apply,
and all browsers and wpt test actually do that:
https://github.com/w3c/accname/issues/64.
Fixes#28848.
The accessible name computation spec has changed to explicitly mention
this case:
Step 2A. Hidden Not Referenced. If the current node is hidden and is:
- Not part of an aria-labelledby or aria-describedby traversal, where
the node directly referenced by that relation was hidden.
- Nor part of a native host language text alternative element (e.g.
label in HTML) or attribute traversal, where the root of that traversal
was hidden.
See https://w3c.github.io/accname/#computation-steps. Chromium, Firefox
and Safari all agree with the spec.
Fixes#29796.
Dmitry Gozman