Summary:
Changelog:
[iOS][Fixed] - When in an RTL locale on iOS, e.nativeEvent.zoomScale is -1. This seems to cause erratic blank spaces that don't recover as you scroll. Taking Math.abs of the value fixes it. Blame: D36169686 (https://github.com/facebook/react-native/commit/13a72e0ccceb2db6aeacd03b4f429d200392c17b)
Differential Revision: D36468390
fbshipit-source-id: f18244f1421fc1ccbb0d1035df8a7c6de10ccf62
Summary:
elementsThatOverlapOffsets was quite inefficient as it was doing a linear scan over all items without an early out for each input offset.
The number of items can be large, so we'd want to use binary search here.
Before: O(MN), where M is the # offsets and N is the # items
After: O(MlogN)
As a utility method, elementsThatOverlapOffsets should not be responsible for checking that the offsets are in increasing order
'binary-search' dep added via https://www.internalfb.com/intern/wiki/React_Native/Building_Product_Experiences/Third_Party_Packages_(npm)/
Changelog:
[Internal] - Modify VirtualizeUtils.elementsThatOverlapOffsets to use binary search
Reviewed By: javache
Differential Revision: D36292326
fbshipit-source-id: 5f22eb5533b69e2ebe5c1cb34e4f82605838f0a7
Summary:
Sometimes this._scrollMetrics.offset is 0 even after initial scroll is triggered, because the offset is updated only upon _onScroll, which may not have been called in time for the next computation of the render limits. Thus, there is a window of time where computeWindowedRenderLimits calculates undesired render limits as it uses the offset. This results in 2 extra rerenders of the VirtualizedList if an initial scroll offset is applied, as the render limits shifts from the expected bounds (calculated using initialScrollIndex), to the 0 offset bounds (calculated using computeWindowedRenderLimits due to offset = 0), back to the expected bounds (onScroll triggers recalculation of render limits via _updateCellsToRender).
This issue was introduced in https://www.internalfb.com/diff/D35503114 (https://github.com/facebook/react-native/commit/c5c17985dae402725abb8a3a94ccedc515428711)
We cannot rely on this._hasDoneInitialScroll to indicate that scrolling *actually* finished (specifically, that _onScroll was called). Instead, we want to recalculate the windowed render limits if any of the following hold:
- initialScrollIndex is undefined or is 0
- initialScrollIndex > 0 AND scrolling is complete
- initialScrollIndex > 0 AND the end of the list is visible (this handles the case where the list is shorter than the visible area) <- this is the case that https://www.internalfb.com/diff/D35503114 (https://github.com/facebook/react-native/commit/c5c17985dae402725abb8a3a94ccedc515428711) attempted to address
Changelog:
[Internal][Fixed] - Fix issue where VirtualizedList rerenders multiple times and flickers when initialScrollIndex is set
Reviewed By: JoshuaGross
Differential Revision: D36328891
fbshipit-source-id: aba26aa06b24f6976657dd1e9f95bb666f60d9a6
Summary:
During debugging of undesired behavior using VirtualizedList with initialScrollIndex, it was found that zoomScale was sometimes undefined, which resulted in elementsThatOverlapOffsets returning not being able to find the frame at the given offsets.
This does not cause any unexpected behavior when scrolling from the top, as the first item index in VirtualizedList is always calculated to be 0; however, when we set initialScrollIndex, the frame calculations are incorrect, resulting in wasteful re-renders of the VirtualizedList as it renders every frame (row) from the top.
Changelog:
[Internal][Fixed] - Default zoomScale to 1 for computeWindowedRenderLimits and elementsThatOverlapOffsets in order to fix render limit calculation.
Differential Revision: D36294426
fbshipit-source-id: 1e1abec1c95f58a1913bafa2c9680e51e2dc26fa
Summary:
We are working on making the empty object literal `{}` have the type `{}` - i.e. exact empty object - rather than being unsealed.
Some manual fixes, in particular to React Native code, which is used and can be synced to other repos (e.g. WWW).
With these changes, error diff in Xplat is down to ~1990 errors
Note that after I roll out `exact_empty_objects`, I'll codemod all the `{...null}` (the only way to get an exact empty object currently) back to `{}`
Changelog: [Internal]
Reviewed By: SamChou19815
Differential Revision: D36142838
fbshipit-source-id: 054caf370db230f42a4c5f5706c88979ef246537
Summary:
We are working on making the empty object literal `{}` have the type `{}` - i.e. exact empty object - rather than being unsealed.
Making this change exposes a variety of errors. We can prevent these errors by annotating what we want the type of the empty object to be.
Reduces Xplat error diff to 2.3k
- Announcement: [post](https://fb.workplace.com/groups/flowlang/posts/903386663600331)
- Support group: [Flow Support](https://fb.workplace.com/groups/flow)
drop-conflicts
Format:
```
arc f
```
Sort imports
```
hg l -n | xargs js1 lint --fix --rule 'fb-tools/sort-requires'
```
Changelog: [Internal]
Reviewed By: samwgoldman
Differential Revision: D36086696
fbshipit-source-id: 90447279f2e6e38f44189b74ec0297719f7adf58
Summary:
When a FlatList is nested inside another FlatList, it may be re-rendered whenever the outer FlatList renders. Apply the same optimization we already had in `VirtualizedListContextProvider` to avoid changing the context object if no values have changed.
Changelog: [General][Changed] - Optimized VirtualizedList context when used with nested lists
Reviewed By: genkikondo
Differential Revision: D35905952
fbshipit-source-id: 695253c85db2043d22e208ad94ecc7daa1455055
Summary:
Fixes https://github.com/facebook/react-native/issues/33529 (note that I reproduced the bug on iOS too).
The bug comes from the fact that we were using `this._scrollMetrics.offset` to determine if the initial scroll was done. But sometimes it equals 0 even after the initial scroll is done, for example when the content does not fill the list. So I replaced it with `this._hasDoneInitialScroll`.
I believe that `this._hasDoneInitialScroll` was not used in the first place because it was introduced later (3 years ago vs 5 years ago for the original code).
The replacement correctly fixes the broken test case and the example given in the issue.
Then I had to update two test cases (rename the first and remove the second), that shows explicitly the broken behavior:
we have to simulate the initial scroll for the content to be adjusted, so when the content does not fill the view and the scroll cannot be executed, the content is not adjusted.
## Changelog
[General] [Fix] - Fix VirtualizedList with initialScrollIndex not rendering all elements when data is updated
Pull Request resolved: https://github.com/facebook/react-native/pull/33558
Test Plan:
- I added a broken test case based on the issue
- I tested with the RNTesterApp using the code example given in the issue
Reviewed By: ryancat
Differential Revision: D35503114
Pulled By: yungsters
fbshipit-source-id: 67bb75d7cf1ebac0d59127d0d45afbaa3167dcf3
Summary:
Problem:
All CellRenderers rerender every time the containing VirtualizedList is rerendered. This is due to the following:
- Lambda is created for each CellRenderer's onLayout prop on every VirtualizedList render (fixed in D35061321 (https://github.com/facebook/react-native/commit/19cf70266eb8ca151aa0cc46ac4c09cb987b2ceb))
- CellRenderer's parentProps prop changes on every VirtualizedList render (fixed in D35062323 (https://github.com/facebook/react-native/commit/adb2962fee968d7ae20ec32a55dc69e4ebb3ce12))
- FlatList recreates renderItem/ListItemComponent in FlatList._renderer (addressed in this diff)
Changelog:
[Internal] - VirtualizedList optimization - memoize FlatList._renderer
Reviewed By: ryancat
Differential Revision: D35067472
fbshipit-source-id: 124629d94821f35b8943730839fbe72f547e80fd
Summary:
Problem:
All CellRenderers rerender every time the containing VirtualizedList is rerendered. This is due to the following:
- Lambda is created for each CellRenderer's onLayout prop on every VirtualizedList render (fixed in D35061321 (https://github.com/facebook/react-native/commit/19cf70266eb8ca151aa0cc46ac4c09cb987b2ceb))
- CellRenderer's parentProps prop changes on every VirtualizedList render (addressed in this diff)
- FlatList recreates renderItem/ListItemComponent in FlatList._renderer
Changelog:
[Internal] - VirtualizedList optimization - refactor CellRenderer props to eliminate parentProps
Reviewed By: javache
Differential Revision: D35062323
fbshipit-source-id: 705c2f7c6c482b7813efdfdac7019a94594de590
Summary:
Problem:
All CellRenderers rerender every time the containing VirtualizedList is rerendered. This is due to the following:
- Lambda is created for each CellRenderer's onLayout prop on every VirtualizedList render (fixed in this diff)
- CellRenderer's parentProps prop changes on every VirtualizedList render
Changelog:
[Internal] - VirtualizedList optimization - avoid lambda creation in CellRenderer onLayout prop
Reviewed By: javache
Differential Revision: D35061321
fbshipit-source-id: ab16bda8418b692f1edb4bce87e25c34f6252b56
Summary:
Changelog:
[General][Fixed] - Remove illegal private property access in VirtualizedSectionList.scrollToLocation
`VirtualizedSectionList.scrollToLocation` internally uses `VirtualizedList`'s `_getFrameMetricsApprox` method. This method is private by convention (since it's `_`-prefixed), but under certain build setups this is also enforced at runtime, so using `scrollToLocation` can throw an error.
Here, we rename this internal method to `__getFrameMetricsApprox` (adding another leading underscore) which opts it out of being treated as private, while still communicating that it's not part of the public API. We also delete the Flow error suppression that masked this issue.
For reference: This convention for private methods (including the double-underscore opt out) has its roots in Facebook's pre-Babel [JSTransform](https://github.com/facebookarchive/jstransform/blob/master/visitors/es6-class-visitors.js) compiler and is implemented in Flow as [`munge_underscores=true`](https://flow.org/en/docs/config/options/#toc-munge-underscores-boolean).
Reviewed By: yungsters
Differential Revision: D33982339
fbshipit-source-id: 498563c59d42549c94fe90d363677d6d3ea35d2d
Summary:
flow 0.146 became more conservative about refinement invalidation, no longer accepting that `this.props.onViewableItemsChanged` is truthy. this was suppressed at the time.
instead, we can assign to a const to restore typechecking.
Changelog: [Internal]
Reviewed By: motiz88
Differential Revision: D33743126
fbshipit-source-id: 0b1f0b83c2fe812e88b027c3b1d3d8aca7b09277
Summary:
Links under `reactnative.dev` that ended with `.html` lead to Page not found.
Fixed the url so that users get sent to the appropriate url.
## Changelog
<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://github.com/facebook/react-native/wiki/Changelog
-->
[General] [Fixed] - Fixed dead links in the comments.
Pull Request resolved: https://github.com/facebook/react-native/pull/32619
Test Plan: - Changed links are accessible
Reviewed By: lunaleaps
Differential Revision: D32528978
Pulled By: cortinico
fbshipit-source-id: e039d18188371cf5240b37049e431329e28b1b8b
Summary:
This diff runs the codemod to add type annotations to function parameters in preparation for Flow's local type inference (LTI) project. I ran the codemod over xplat/js and reverted any files that had flow errors in them. See the list of commands run to see the regeneration of various files.
Changelog:
[Internal][Changed] - Added type annotations
Reviewed By: yungsters
Differential Revision: D32075270
fbshipit-source-id: 6a9cd85aab120b4d9e690bac142a415525dbf298
Summary:
Eliminates all of the console logs that appear when successfully running Jest tests for React Native.
Changelog:
[Internal]
Reviewed By: lunaleaps
Differential Revision: D32304619
fbshipit-source-id: 8bc8ef9337ae6af588238cec7cfb874ac6067340
Summary:
occured -> occurred
## Changelog
<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://github.com/facebook/react-native/wiki/Changelog
-->
[Internal] [Fixed] - Fixed typo in VirtualizedList-test.js
Pull Request resolved: https://github.com/facebook/react-native/pull/31756
Test Plan: NONE
Reviewed By: lunaleaps
Differential Revision: D29975153
Pulled By: charlesbdudley
fbshipit-source-id: 966d90df0bf015b4a6a2e3b1bf88c66b61161a7a
Summary:
This change adds a series of snapshot tests to validate the render output of VirtualizedList in mixed scenarios. Jest timer mocks are used to measure rendering at different ticks. These test cases mostly center around realization logic, to help prevent regressions when chaning internal state representation.
## Changelog
<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://github.com/facebook/react-native/wiki/Changelog
-->
[Internal] [Added] - Add unit tests for VirtualizedList render quirks
Pull Request resolved: https://github.com/facebook/react-native/pull/31401
Test Plan: Ran the added UTs locally.
Reviewed By: lunaleaps
Differential Revision: D28017750
Pulled By: rozele
fbshipit-source-id: df9684c4ac80a8732f3e88e7496815127213832e
Summary:
A CellRenderMask helps track regions of cells/spacers to render. It's API allows adding ranges of cells, where its otput be an ordered list of contiguous spacer/non-spacer ranges.
The implementation keeps this region list internally, splitting or merging regions when cells are added. This output will be used by the render function of a refactored VirtualizedList.
## Changelog
<!-- Help reviewers and the release process by writing your own changelog entry. For an example, see:
https://github.com/facebook/react-native/wiki/Changelog
-->
[Internal] [Added] - Add "CellRenderMask" Region Tracking Structure
Pull Request resolved: https://github.com/facebook/react-native/pull/31420
Test Plan: Validated via UTs.
Reviewed By: lunaleaps
Differential Revision: D28293161
Pulled By: rozele
fbshipit-source-id: a5e4e2144a90387aabe0974650429018440abf67
Summary:
This pre-suppresses the 154 error diff ahead of its release, since it is large.
Changelog: [Internal]
Reviewed By: samwgoldman
Differential Revision: D29065246
fbshipit-source-id: f418041305a46df410dcbe3d9a4db81a61ac7014
Summary:
This pre-suppresses the 153 error diff ahead of its release, since it is large.
Changelog: [Internal]
Reviewed By: mroch
Differential Revision: D28754374
fbshipit-source-id: 1806f53bc7d804644d434583a2dcd6da63d00328
Summary:
Changelog:
[Internal] - Refactors SectionList component to be a functional component instead of a Class component
Closes#31322
Reviewed By: lunaleaps
Differential Revision: D27681457
fbshipit-source-id: ef0e68dd4bc91e83b40c55a4a959f27e69292964
Summary:
Changelog:
[Internal][Changed] - Remove keyExtractor from defaultProps as part of larger effort to remove defaultProps from VirtualizedList
[General][Changed] - Remove data as a prop for VirtualizedSectionList. In the reactnative.dev docs it mentions that sections is the equivalent for *SectionList: https://reactnative.dev/docs/sectionlist#sections
[General][Changed] - Change export type of VirtualizedSectionList and wrap component updates in act in test.
[Internal] - Remove FlowFixMe from VirtualizedSectionList
Reviewed By: kacieb
Differential Revision: D27271493
fbshipit-source-id: f83bdcce9c71c140c8a8fb6f0ecd9bb520fcb85b
Summary:
#Changelog:
[General][Changed] - Remove `data` as a prop for VirtualizedSectionList. In the reactnative.dev docs it mentions that `sections` is the equivalent for `*SectionList`: https://reactnative.dev/docs/sectionlist#sections
Reviewed By: nadiia
Differential Revision: D26992800
fbshipit-source-id: afcd027fca0cc8b4d7418e0c5543382bc8e2f56c
Summary:
Changelog:
[Internal][Changed] -Remove keyExtractor from defaultProps as part of larger effort to remove defaultProps from VirtualizedList
Reviewed By: nadiia
Differential Revision: D26969588
fbshipit-source-id: b00922a339cbe471fcbf560ab4abdd9e48eda1fc
Summary:
Changelog:
[Internal][Changed] -Remove updateCellsBatchingPeriod from defaultProps as part of larger effort to remove defaultProps from VirtualizedList
Reviewed By: nadiia
Differential Revision: D26969581
fbshipit-source-id: b1d1d18d575d9a6af2e68fe564d221849094f26b
Summary:
Changelog:
[Internal][Changed] -Remove windowSize from defaultProps as part of larger effort to remove defaultProps from VirtualizedList
Reviewed By: nadiia
Differential Revision: D26969589
fbshipit-source-id: da6215ee3876c8f186d59f91ef6fd94396366119
Summary:
Changelog:
[Internal][Changed] -Remove scrollEventThrottle from defaultProps as part of larger effort to remove defaultProps from VirtualizedList
Reviewed By: nadiia
Differential Revision: D26969580
fbshipit-source-id: 504e11493113c01d70e77b90f96c6506c179c060
Blair Vanderhoof
Genki Kondo
Sam Zhou
Evan Yeung
islandryu
George Zahariev
Pieter De Baets
Luna Wei
Antoine Doubovetzky
Moti Zilberman
fabriziobertoglio1987
Rick Hanlon
Marshall Roch
Andres Suarez
Jesse Katsumata
Tim Yung
Ikko Ashimine
Nick Gerleman
Joshua Wiegmann
Daniel Sainati
David Vacca
Madhav Gharmalkar
Jimmy Zhang