Summary:
Migrating everything to import from StyleSheet instead of StyleSheetTypes.
Search and replaced
```
import type {StyleObj} from 'StyleSheetTypes';
```
to
```
import type {DangerouslyImpreciseStyleProp} from 'StyleSheet';
```
and then replacing `StyleObj` with `DangerouslyImpreciseStyleProp` and fixing up the remaining flow errors by hand.
Reviewed By: yungsters
Differential Revision: D7184077
fbshipit-source-id: b8dabb9d48038b5a997ab715687300bad57aa9d4
Summary:
Includes React Native and its dependencies Fresco, Metro, and Yoga. Excludes samples/examples/docs.
find: ^(?:( *)|( *(?:[\*~#]|::))( )? *)?Copyright (?:\(c\) )?(\d{4})\b.+Facebook[\s\S]+?BSD[\s\S]+?(?:this source tree|the same directory)\.$
replace: $1$2$3Copyright (c) $4-present, Facebook, Inc.\n$2\n$1$2$3This source code is licensed under the MIT license found in the\n$1$2$3LICENSE file in the root directory of this source tree.
Reviewed By: TheSavior, yungsters
Differential Revision: D7007050
fbshipit-source-id: 37dd6bf0ffec0923bfc99c260bb330683f35553e
Summary:
Right now when an interaction is recorded on a parent VirtualizedList, the interaction isn't passed on to its children. That means that if `waitForInteraction` is set to true for a child list's viewability helper, it will never trigger a VPV.
This change adds forwarding of these events inside `onBeginScrollDrag`. It also forwards the interaction state of the parent list at register time, in case a child list is rendered mid-scroll.
Reviewed By: sahrens
Differential Revision: D6822091
fbshipit-source-id: dfe300e42722d4285f65787ab2c1368f050c5577
Summary:
Sticky headers for inverted lists should still stick at the top of the list instead of the bottom.
Tested by adding the inverted prop to the SectionList example in RNTester.
It does add a prop to ScrollView but it's very specific to the inverted list implementation, not sure if it should be documented.
[GENERAL][ENHANCEMENT][LISTS] - Support sticky headers for inverted Lists
Closes https://github.com/facebook/react-native/pull/17762
Differential Revision: D6830784
Pulled By: sahrens
fbshipit-source-id: 6841fdd46e04b30547659d85ff54c3a21c61a8a2
Summary:
Setting `windowSize = 0` doesn't make sense. Let's make sure we catch this problem in the constructor so that it doesn't cause inexplicable list behavior.
Also fixed an invariant in `VirtualizeUtils` that is meant to prohibit non-monotonically-increasing offset arrays. As written, the invariant condition can never actually be violated.
Reviewed By: sahrens
Differential Revision: D6625302
fbshipit-source-id: b2a983cbe7bb5fbe0aed7c5d59e69a8a00672993
Summary:
The change enabling virtualization in nested lists contained a hidden assumption that nested lists would only appear within the *cells* of a parent list.
If a list header or footer component contains a `VirtualizedList`, that child list won't be wrapped in a `CellRenderer` component and therefore won't have access to `virtualizedCellRenderer` through its context. This causes an error when the child list tries to access the `cellKey` property on an undefined object.
This change wraps the header/footer views in a `VirtualizedCellWrapper` component which supplies that context properly.
Reviewed By: sahrens
Differential Revision: D6603342
fbshipit-source-id: 4d2d82f04947048a16ec9968121d8ecc8c95655a
Summary:
In the current implementation of the `VirtualizedList` the `onViewableItemsChanged` callback wouldn't trigger if the underlying list data changes. (see example snack https://snack.expo.io/Hk5703eBb)
I added a method in the `ViewabilityHelper` to invalidate the cached viewableIndices, which gets triggered when the list-data changes.
Closes https://github.com/facebook/react-native/pull/14922
Differential Revision: D5864537
Pulled By: sahrens
fbshipit-source-id: 37f617763596244208548817d5b138dadc12c75d
Summary: Allows handling the case of wanting to scroll beyond the measured window.
Reviewed By: TheSavior
Differential Revision: D5915331
fbshipit-source-id: 329927632f4d04f213567ce4bbe547b04b8ea86d
Summary:
Fixing https://github.com/facebook/react-native/issues/13578
<!--
Thank you for sending the PR! We appreciate you spending the time to work on these changes.
Help us understand your motivation by explaining why you decided to make this change.
You can learn more about contributing to React Native here: http://facebook.github.io/react-native/docs/contributing.html
Happy contributing!
-->
(Write your motivation here.)
(Write your test plan here. If you changed any code, please provide us with clear instructions on how you verified your changes work. Bonus points for screenshots and videos!)
Closes https://github.com/facebook/react-native/pull/15419
Reviewed By: sahrens
Differential Revision: D5795844
Pulled By: tomasreimers
fbshipit-source-id: 4cdf97a2f5e83e38f4e12af771b512e7dddd212a
Summary: FlatList only supports one viewability configuration and callback. This change extends FlatList and VirtualizedList to support multiple viewability configurations and corresponding callbacks.
Reviewed By: sahrens
Differential Revision: D5720860
fbshipit-source-id: 9d24946362fa9001d44d4980c85f7d2627e45a33
Summary:
The invariant condition doesn't allow scrolling to the last index
Here is a simple reproduction of the problem: https://snack.expo.io/BJ59gzWrZ
Surely, if the last item is rendered, we should be able to scroll to it without an invariant failing?
Tested locally that this change fixes the issue.
Closes https://github.com/facebook/react-native/pull/14934
Differential Revision: D5414535
Pulled By: shergin
fbshipit-source-id: 38dac4c0e2ae5e1e199a67ca0e98e8f7325e77f4
Summary:
(prior to the scroll metrics being set up, or prior to the view being scrolled to the right location).
I'm using a StackNavigator to push a FlatList secondary screen, and it was causing extraneous rendering (item X ->item 0 -> item X)
I've logged inside the render functions of my `renderItem` function, and verified that it no longer attempts to render item 0 anymore. And I've verified from the `VirtualizedList.state` no longer renders a `{first: 0, last: 0}`, but persistently stays at `{first: X, last: X}` from start until things stabilize.
Closes https://github.com/facebook/react-native/pull/14562
Reviewed By: bvaughn
Differential Revision: D5283771
Pulled By: sahrens
fbshipit-source-id: 0f70ac0b89922449bd20bfa69edbc8939eafdf1f
Summary:
Returning an object that doesn't have all the required properties from `getItemLayout` doesn't cause a flow error (maybe because we are using `createAnimatedComponent`) and caused ALL items to be rendered which caused perf issues that were hard to debug (typo lenght -> length -_-). This adds a simple warning in DEV mode using checkPropTypes.
**Test plan**
Tested in RNTester by passing a bad `getItemLayout` function.
Closes https://github.com/facebook/react-native/pull/14111
Differential Revision: D5283942
Pulled By: sahrens
fbshipit-source-id: 8909532dfddd8628b7fb3380c198f0dfa88f240a
Summary:
Curently FlatList does not implement setting native props directly like the old ListView did. This pr introduce the `setNativeProps` function which delegates to MetroListView or VirtualizedList. Thos don't have `setNativeProps` handling either, so, I delegated further to the respective ListView and Scroll components, which do have handling for it, thus, allowing to set the native props through FlatList.
Create a project with a FlatList and change a native property using `setNativeProps`:
```javascript
componentDidMount() {
setInterval(() => {
this.list.setNativeProps({ style: {backgroundColor:"white"} })
}, 1000)
}
render() {
return (
<View style={styles.container}>
<FlatList ref={component => this.list = component}
style={{backgroundColor:"black"}}
data={[{key: 'a'}, {key: 'b'}]}
renderItem={({item}) => <Text>{item.key}</Text>} />
</View>
)
}
```
Fixes#13501
Closes https://github.com/facebook/react-native/pull/13529
Differential Revision: D5283593
Pulled By: sahrens
fbshipit-source-id: 8f96f88e286042d82452fef924689b5a8a783987
Summary:
When rendering a large list without a getItemLayout (ie SectionList, where it's hard to compute), it freaks out and attempt to render them all, starving the rendering/layout engine from computing the size (and more accurately figurnge out how few it actually should render.)
Before this change, with <FlatList maxToRenderPerBatch={5} data={objectOfLengthN} />, I essentially saw it doing:
```
{first: 0, last: 0}
{first: 0, last: 5}
{first: 0, last: 10}
....
{first: 0, last: N}
```
(no more hiPri renders since all elements have been rendered)
(actually renders and lays out all N objects, and computes their sizes)
(realizes that it doesn't need to show all N for my current screen size and row size)
```{first: 0, last: 55}```
After this change, that whole first part where it keeps incrementing `last` to try to "keep up with the scrolling" disappears.
Closes https://github.com/facebook/react-native/pull/14563
Differential Revision: D5278796
Pulled By: sahrens
fbshipit-source-id: 5db117b40909ec4bc92fba9b5556c6a2add046ac
Summary:
This uses `context` to render inner lists of the same orientation to a plain `View` without
virtualization instead of rendering nested `ScrollView`s trying to scroll in the same direction,
which can cause problems.
Reviewed By: bvaughn
Differential Revision: D5174942
fbshipit-source-id: 989150294098de837b0ffb401c7f5679a3928a03
Summary:
This is necessary to fix an extraneous warning when a VirtualizedList is constructed on the first frame.
On the first frame, the dt is huge (ie, time since epoch).
On the second frame (which may legitimately be slow as a result of a lot to render), it will then assume there were two consecutive slow frames, and print a warning:
"VirtualizedList: You have a large list that is slow to update..."
Closes https://github.com/facebook/react-native/pull/14393
Differential Revision: D5210467
Pulled By: sahrens
fbshipit-source-id: 2e79218c3d66a4a9df4884f328a125047ef264ed
Summary:
Flashing scroll indicators is a standard behavior on iOS to show the user there's more content.
Launch RNTester on iOS, go to the ScrollView section, tap the "Flash scroll indicators" button.
You'll see this:
I've exposed the method `flashScrollIndicators` on all scrolling components that were already exposing a `scrollToXXX` method so it's usable from those components using a ref.
Let me know what you think.
Closes https://github.com/facebook/react-native/pull/14058
Differential Revision: D5103239
Pulled By: shergin
fbshipit-source-id: caad8474fbe475065418d771b17e4ea9766ffcdc
Summary:
I expanded the documentation of the scrollToOffset method a bit in FlatList
Thanks for submitting a PR! Please read these instructions carefully:
- [x] Explain the **motivation** for making this change.
- [x] Provide a **test plan** demonstrating that the code is solid.
- [x] Match the **code formatting** of the rest of the codebase.
- [x] Target the `master` branch, NOT a "stable" branch.
The documentation of the scrollToOffset method in FlatList was a bit confusing. Also, there was no documentation for this method on VirtualizedList. I added the doc block there and linked to it from the FlatList doc block.
Please check if the link on the FlatList scrollToOffset method links to the scrollToOffset method of the VirtualizedList docs page.
Sign the [CLA][2], if you haven't already.
Small pull requests are much easier to review and more likely to get merged. Make sure the PR does only one thing, otherwise please split it.
Make sure all **tests pass** on both [Travis][3] and [Circle CI][4]. PRs that break tests are unlikely to be merged.
For more info, see the ["Pull Requests"][5] section of our "Contributing" guidelines.
[1]: https://medium.com/martinkonicek/what-is-a-test-plan-8bfc840ec171#.y9lcuqqi9
[2]: https://code.facebook.com/cla
[3]: https://travis-ci.org/facebook/react-native
[4]: http://circleci.com/gh/facebook/react-native
[5]: https://github.com/facebook/react-native/blob/master/CONTRIBUTING.md#pull-requests
Closes https://github.com/facebook/react-native/pull/14317
Differential Revision: D5192378
Pulled By: hramos
fbshipit-source-id: 6131a8e5adb2a2f7cb84344541f4f8b999a232d2
Summary:
This is a simple bugfix. `_updateViewableItems` expects the `data` prop, as it calls `getItemCount` on it. Without this, `onViewableItemsChanged` updates twice for each scroll position, once from `_onScroll` with the incorrect results, and once from `_updateCellsToRender` with the correct results. This means the callback nigh-on unusable.
I simply logged the results of `onViewableItemsChanged` and made sure they were correct.
Closes https://github.com/facebook/react-native/pull/14162
Differential Revision: D5128363
Pulled By: sahrens
fbshipit-source-id: 3faef812068921a26ed871339da79870fd0d911c
Summary:
Hey there :)
Please let me know if the name `ListEmptyComponent` should be changed. I also thought about `ListNoItemsComponent`. Or maybe `ListPlaceholderComponent`?
- [x] Explain the **motivation** for making this change.
- [x] Provide a **test plan** demonstrating that the code is solid.
- [x] Match the **code formatting** of the rest of the codebase.
- [x] Target the `master` branch, NOT a "stable" branch.
In a FlatList, I wanted to show some placeholder when my data is empty (while keeping eventual Header/Footer/RefreshControl).
A way around this issue would be to do something like adding a `ListHeaderComponent` that checks if the list is empty, like so:
```js
ListHeaderComponent={() => (!data.length ? <Text style={styles.noDataText}>No data found</Text> : null)}
```
But I felt it was not easily readable as soon as you have an actual header.
This PR adds a `ListEmptyComponent` that is rendered when the list is empty.
I added tests for VirtualizedList, FlatList and SectionList and ran `yarn test -- -u`. I then checked that the snapshots changed like I wanted.
I also tested this against one of my project, though I had to manually add my changes because the project is on RN 0.43.
Here are the docs screenshots:
- [VirtualizedList](https://cloud.githubusercontent.com/assets/82368/25566000/0ebf2b82-2dd2-11e7-8b80-d8c505f1f2d6.png)
- [FlatList](https://cloud.githubusercontent.com/assets/82368/25566005/2842ab42-2dd2-11e7-81b4-32c74c2b4fc3.png)
- [SectionList](https://cloud.githubusercontent.com/assets/82368/25566010/368aec1e-2dd2-11e7-9425-3bb5e5803513.png)
Thanks for your work!
Closes https://github.com/facebook/react-native/pull/13718
Differential Revision: D4993711
Pulled By: sahrens
fbshipit-source-id: 055b40f709067071e40308bdf5a37cedaa223dc5
Summary:
The main reason to use **VirtualizedList** is to set the `getItem` and `getItemCount` props, so having default values for these props makes things error prone.
* In **VirtualizedList**, changed the `getItem` and `getItemCount` props from optional to required, and removed default values.
* Ensured that implementing classes **FlatList** and **SectionVirtualizedList** are always passing these props.
* Updated VirtualizedList-test.js accordingly.
Reviewed By: sahrens
Differential Revision: D4980236
fbshipit-source-id: ad1838931253bc61ff9068c40929f6e9c755b92c
Summary:
- If the initial render doesn't extend past `onEndReachedThreshold` it is likely that onEndReached won't get called until scroll, which can be a bad experience if the `initialNumToRender` is very close to the viewport height. This happens because when `onContentSizeChange`, `onLayout` may not have fired yet so we don't know what the `visibleLength` is. Fix is to also call `maybeCallOnEndReached` in `_onLayout` as well.
- We have an optimization that does hi-pri render window updates when scrolling quickly and the content reaches the edge of the viewport, but there is also an important case where the user has scrolled to the end of the content and is waiting for a network response. Once the new data comes in, we want to render it ASAP because the user is waiting for it. To solve this we refactor our scheduling code into a shared function that always checks if it should be a hi-pri update instead of just in `_onScroll`.
Reviewed By: bvaughn
Differential Revision: D4975314
fbshipit-source-id: 8d64832ecbcbdbac430a08a4018d7a32b2216a85
Eli White
Sophie Alpert
Caleb Meredith
Brian Vaughn
Oleg Lokhvitsky
Logan Daniels
Janic Duplessis
glevi@fb.com
Avik Chaudhuri
Martin Rädlinger
Sam Goldman
Tomas Reimers
Spencer Ahrens
Christopher Chedeau
Tomas Reimers
m30do
Marshall Roch
Vince Oppedisano
Maarten Schumacher
Mike Lambert
zongwan
Rene Weber
Kexi Long
Jean Regisser
Jakob Kerkhove
ashoat
Xinbo Wang
Louis Lagrange
Jeff Case
