| commit | 6957ca43bb92c9a9b2eb503862870d19e3e56ad0 | |
| author | Grisha Kruglov <gkruglov@mozilla.com> | |
| Tue, 21 Dec 2021 18:40:35 +0000 (21 10:40 -0800) | ||
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | |
| Tue, 21 Dec 2021 19:54:18 +0000 (21 19:54 +0000) | ||
| tree | 2269924e4c946c271558fad3f954820f4c4f1d65 | treesnapshot (tar.gz zip) |
| parent | ae77fb42492ffae120313d20161dc442e2c15f2c | commitdiff |
[fenix] Refactor History types to eliminate nullability
This introduces a separate HistoryDB type at the PagedHistoryProvider
layer, that doesn't need to deal with positions. Positioning logic in
HistoryDataSource becomes a type conversion between the new type and an
existing History type that UI and ItemKeyedDataSource API is written against.
With this refactor, we entirely eliminate nullability from these types.
This introduces a separate HistoryDB type at the PagedHistoryProvider
layer, that doesn't need to deal with positions. Positioning logic in
HistoryDataSource becomes a type conversion between the new type and an
existing History type that UI and ItemKeyedDataSource API is written against.
With this refactor, we entirely eliminate nullability from these types.