Summary:
- Replace some fixes that were accidentally lost in local rebase that prevent jumpiness when incremental is disabled.
- Require each row to have a key specified by the caller to prevent jumping because of accidental duplicates or unneeded/problematic row re-rendering because of legit re-ordering.
Reviewed By: steveluscher
Differential Revision: D3322006
fbshipit-source-id: 0019aab07cb1fe2b148a14b5818de53aa373eb50
Summary:`WindowedListView` is designed for memory efficient scrolling of
huge/infinite lists of variable height rows. It works by measuring row heights
with `onLayout` and caching the results, then unmounting rows that scroll
offscreen, replacing them with an equivalent offset in the spacer view. Care is
taken to render a constant number of rows, and to only render one new row per
tick to improve framerate and app responsiveness. WLV is also compatible with
<Incremental> used within the rows themselves.
`WindowedListView` is not a drop-in replacement for `ListView` - it doesn't
support many of the features of `ListView`, such as section headers, only
accepts a simple array of data instead of a datasource, and doesn't support
horizontal scrolling. This may change in the future.
This is still experimental - we haven't deployed this for any production apps
yet.
Differential Revision: D2791402
fb-gh-sync-id: 5f104e0903f6ba586d2d651bdf82863a231279d8
fbshipit-source-id: 5f104e0903f6ba586d2d651bdf82863a231279d8
Spencer Ahrens