1518315 - Support clearing accessibility focus API

Status: RESOLVED FIXED

(Core :: Disability Access APIs, enhancement)

Description

[Eitan Isaacson [:eeejay]]

Accessibility services in Android rely an accessible cache that refreshes certain nodes on events[1]. We need to correctly dispatch an a11y focus cleared event if ACTION_CLEAR_ACCESSIBILITY_FOCUS is explicitly called on that node.

Android's root view knows to clear accessibility focus[2] on the previously focused node when a new node is in focus, so we shouldn't be doing that ourselves.

We also need to dispatch the cleared event each time, even if the node does not currently have focus. This is to support out-of-sync caches and appease them with an event.

1. https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/view/accessibility/AccessibilityCache.java
2. https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/view/ViewRootImpl.java#3731

Comment 1

[Eitan Isaacson [:eeejay]]

Attachment: Bug 1518315 - Clear accessibility focus correctly. r?yzen!

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/a7f3a2c57318
Clear accessibility focus correctly. r=yzen

Comment 3

[Cristian Brindusan [:cbrindusan]]

https://hg.mozilla.org/mozilla-central/rev/a7f3a2c57318