Introduce a static method so we don't need to copy paste code.
Note that the static method still largely duplicates what the method
.buildIndex() will later do. Both loops iterate the reference groups
and the references in each group. The main difference is that the
"is empty" check stops extremely early the moment it finds any
non-empty group.
That's also why I'm convinced it's not worth caching the result.
I benchmarked it and it's nanoseconds. But there are more reasons:
The non-static .isIndexEmpty() method is currently only used when
Citoid is active the same time. Which means the cached result was
entirely unused on installations without Citoid.
Bug: T356871
Change-Id: Id5c4295086bc977ef52ad141be9962d2eecb1bcc
The search index is really only used in a single place, in the
buildSearchResults method at the very bottom of the class. I find it
more obvious to understand what's going on when the places where the
search index is populated and used are as close together as possible.
This again really only moves existing code around without actually
changing anything.
We can also drop the extra "built" property and use a special null
value instead. This is possible because we know the only consumer of
the this.index property and can guarantee it can't get confused by
the null.
Bug: T356871
Change-Id: Iaddb3b16b3aa776f89fca2bf0350cce9b6bb1a23
This turns two methods with side-effects into more pure functions
with more obvious input and output. buildSearchIndex rebuilds the
internal search index from the internalList. buildSearchResults
filters and creates the result widgets the user will see.
This patch really only moves existing code around but doesn't change
anything. Except that this.built is set before onQueryChange is
called, not after. This avoids potential endless loops in case
onQueryChange happens to trigger buildIndex again.
Bug: T356871
Change-Id: Ib80a2dcb85779d64bec53caf90c49879d0ea2258
