tree 18d5a3f47c86061b3ff41a7f00b158b9da9c2706
parent 53ec902ccc7554970ba5f400fac7dfbd1277d9ab
author Filip Filmar <fmil@google.com> 1618264497 +0000
committer CQ Bot <commit-bot@chromium.org> 1618264497 +0000

[root_presenter] Report focus changes to the keyboard subsystem

The keyboard subsystem needs to know when the focus changes so that
it can dispatch key events correctly.  Root presenter's old code did
not report the focus changes, so this commit is adding a connection
that does just that.

In the process, I discovered that the `FocusChain` spec claims that
`focus_chain` is always set, which is not actually the case: early
in the setup we may end up with unset `focus_chain`, so modified the
protocol spec for `FocusChain` to document this.

Tested: fx test //src/ui/bin/root_presenter/tests
  fx make-integration-patch ...
  fx ... lsc ...
Fixed: 70966
Change-Id: Ia54f29f816b61673eafffdf8a7137ac928490067
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/511640
Fuchsia-Auto-Submit: Filip Filmar <fmil@google.com>
Reviewed-by: Alice Neels <neelsa@google.com>
Reviewed-by: Mukesh Agrawal <quiche@google.com>
API-Review: Alice Neels <neelsa@google.com>
API-Review: Jaeheon Yi <jaeheon@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>