Summary:
As I was working on mimicking iOS animations for my ongoing work with `react-navigation`, one task I had was to match the "push from right" animation that is common in UINavigationController.
I was able to grab the exact animation values for this animation with some LLDB magic, and found that the screen is animated using a `CASpringAnimation` with the parameters:
- stiffness: 1000
- damping: 500
- mass: 3
After spending a considerable amount of time attempting to replicate the spring created with these values by CASpringAnimation by specifying values for tension and friction in the current `Animated.spring` implementation, I was unable to come up with mathematically equivalent values that could replicate the spring _exactly_.
After doing some research, I ended up disassembling the QuartzCore framework, reading the assembly, and determined that Apple's implementation of `CASpringAnimation` does not use an integrated, numerical animation model as we do in Animated.spring, but instead solved for the closed form of the equations that govern damped harmonic oscillation (the differential equations themselves are [here](https://en.wikipedia.org/wiki/Harmonic_oscillator#Damped_harmonic_oscillator), and a paper describing the math to arrive at the closed-form solution to the second-order ODE that describes the DHO is [here](http://planetmath.org/sites/default/files/texpdf/39745.pdf)).
Though we can get the currently implemented RK4 integration close by tweaking some values, it is, the current model is at it's core, an approximation. It seemed that if I wanted to implement the `CASpringAnimation` behavior _exactly_, I needed to implement the analytical model (as is implemented in `CASpringAnimation`) in `Animated`.
We add three new optional parameters to `Animated.spring` (to both the JS and native implementations):
- `stiffness`, a value describing the spring's stiffness coefficient
- `damping`, a value defining how the spring's motion should be damped due to the forces of friction (technically called the _viscous damping coefficient_).
- `mass`, a value describing the mass of the object attached to the end of the simulated spring
Just like if a developer were to specify `bounciness`/`speed` and `tension`/`friction` in the same config, specifying any of these new parameters while also specifying the aforementioned config values will cause an error to be thrown.
~Defaults for `Animated.spring` across all three implementations (JS/iOS/Android) stay the same, so this is intended to be *a non-breaking change*.~
~If `stiffness`, `damping`, or `mass` are provided in the config, we switch to animating the spring with the new damped harmonic oscillator model (`DHO` as described in the code).~
We replace the old RK4 integration implementation with our new analytic implementation. Tension/friction nicely correspond directly to stiffness/damping with the mass of the spring locked at 1. This is intended to be *a non-breaking change*, but there may be very slight differences in people's springs (maybe not even noticeable to the naked eye), given the fact that this implementation is more accurate.
The DHO animation algorithm will calculate the _position_ of the spring at time _t_ explicitly and in an analytical fashion, and use this calculation to update the animation's value. It will also analytically calculate the velocity at time _t_, so as to allow animated value tracking to continue to work as expected.
Also, docs have been updated to cover the new configuration options (and also I added docs for Animated configuration options that were missing, such as `restDisplacementThreshold`, etc).
Run tests. Run "Animated Gratuitous App" and "NativeAnimation" example in RNTester.
Closes https://github.com/facebook/react-native/pull/15322
Differential Revision: D5794791
Pulled By: hramos
fbshipit-source-id: 58ed9e134a097e321c85c417a142576f6a8952f8
Summary:
Fixes https://github.com/facebook/react-native/issues/15863 on master. Behavior of `onSubmitEditing` is now consistent between iOS and Android. Tapping the submit button in a TextInput dispatches the event precisely when doing so does not make a newline (when blurOnSubmit is true or multiline is false).
1. Run this app on iOS and Android:
```
// flow
import React, { Component } from 'react';
import {
StyleSheet,
TextInput,
View
} from 'react-native';
type State = {
toggled: boolean
};
type Props = {
blurOnSubmit: boolean,
multiline: boolean
};
class ToggleColorInput extends Component<Props, State> {
state: State = {
toggled: false
};
props: Props;
toggle = () => {
this.setState({
toggled: !this.state.toggled
});
}
render() {
return (
<TextInput
blurOnSubmit={this.props.blurOnSubmit}
multiline={this.props.multiline}
onSubmitEditing={this.toggle}
style={[styles.textInput, {backgroundColor: this.state.toggled ? 'blue' : 'azure'}]}
underlineColorAndroid='transparent'
/>
)
}
}
export default class App extends Component<{}> {
render() {
return (
<View>
<ToggleColorInput blurOnSubmit={true} multiline={true} />
<ToggleColorInput blurOnSubmit={true} multiline={false} />
<ToggleColorInput blurOnSubmit={false} multiline={true} />
<ToggleColorInput blurOnSubmit={false} multiline={false} />
</View>
);
}
}
const styles = StyleSheet.create({
textInput: {
height: 75,
borderWidth: 1,
borderColor: 'black'
}
});
```
2. You see four TextInputs, with each combination of the `blurOnSubmit` and `multiline` properties. For each TextInput, type some text and tap the submit button.
3. The TextInputs in this test will toggle background color when they emit an `onSubmitEditing` event. Verify the following behavior on each platform:
* blurOnSubmit && isMultiline => Submit event emitted, blurred, no newline inserted
* blurOnSubmit && !isMultiline => Submit event emitted, blurred
* !blurOnSubmit && isMultiline => Submit event emitted, newline inserted
* !blurOnSubmit && !isMultiline => Submit event emitted
Closes https://github.com/facebook/react-native/pull/16040
Differential Revision: D5877401
Pulled By: shergin
fbshipit-source-id: 741bcc06d8b69d7025f2cb42dd0bee4fa01cd88e
Summary:
This fixes shrinking of elements which are in a non stretch alignment
Fixes#633
Closes https://github.com/facebook/yoga/pull/634
Differential Revision: D5874862
Pulled By: emilsjolander
fbshipit-source-id: 1426aa6b60f6ba42c2be702e6f24cea935ab7acb
Summary:
Opening a new PR for #10946 (see discussion there).
This PR builds upon #14775 (iOS ViewManager inheritance) and #14261 (more extensible Android WebView).
**Motivation**
When `WebView.android.js` and `WebView.ios.js` use `requireNativeComponent`, they are hard-coded to require `RCTWebView`. This means if you want to re-use the same JS-logic, but require a custom native WebView-implementation, you have to duplicate the entire JS-code files.
The same is true if you want to pass through any custom events or props, which you want to set on the custom native `WebView`.
What I'm trying to solve with this PR is to able to extend native WebView logic, and being able to re-use and extend existing WebView JS-logic.
This is done by adding a new `nativeConfig` prop on WebView. I've also moved the extra `requireNativeComponent` config to `WebView.extraNativeComponentConfig` for easier re-use.
**Test plan**
jacobp100 has been kind enough to help me with docs for this new feature. So that is part of the PR and can be read for some information.
I've also created an example app which demonstrates how to use this functionality: https://github.com/cbrevik/webview-native-config-example
If you've implemented the native side as in the example repo above, it should be fairly easy to use from JavaScript like this:
```javascript
import React, { Component, PropTypes } from 'react';
import { WebView, requireNativeComponent, NativeModules } from 'react-native';
const { CustomWebViewManager } = NativeModules;
export default class CustomWebView extends Component {
static propTypes = {
...WebView.propTypes,
finalUrl: PropTypes.string,
onNavigationCompleted: PropTypes.func,
};
_onNavigationCompleted = (event) => {
const { onNavigationCompleted } = this.props;
onNavigationCompleted && onNavigationCompleted(event);
}
render() {
return (
<WebView
{...this.props}
nativeConfig={{
component: RCTCustomWebView,
props: {
finalUrl: this.props.finalUrl,
onNavigationCompleted: this._onNavigationCompleted,
},
viewManager: CustomWebViewManager
}}
/>
);
}
}
const RCTCustomWebView = requireNativeComponent(
'RCTCustomWebView',
CustomWebView,
WebView.extraNativeComponentConfig
);
```
As you see, you require the custom native implementation at the bottom, and send in that along with any custom props with the `nativeConfig` prop on the `WebView`. You also send in the `viewManager` since iOS requires that for `startLoadWithResult`.
**Discussion**
As noted in the original PR, this could in principle be done with more React Native components, to make it easier for the community to re-use and extend native components.
Closes https://github.com/facebook/react-native/pull/15016
Differential Revision: D5701280
Pulled By: hramos
fbshipit-source-id: 6c3702654339b037ee81d190c623b8857550e972
Summary:
A huge number of Issues are opened with some key information about node/npm versions missing. Adding this information as a required part of the ISSUE_TEMPLATE may help issues get closed faster.
Once merged in, check ISSUE_TEMPLATE by opening new issue, verify new line is there.
Closes https://github.com/facebook/react-native/pull/14422
Differential Revision: D5865411
Pulled By: hramos
fbshipit-source-id: 70e776c8635de38fb149471656e6d260f9eb2537
Summary:
Looks like `-[NSLayoutManager ensureLayoutForTextContainer:textContainer]` has a bug that cause infinite loop inside this method
during measuring some special characters AND when specified `width` equals NaN (which is useless anyways).
So, we cover this case in this diff.
Reviewed By: javache
Differential Revision: D5859767
fbshipit-source-id: 58a5910f21f282bf5b82494916b5b02ad72d357f
Summary:
Native communication is documented for iOS but not Android. Typically pages in Guides (IOS) and Guides (Android) share a common structure/content but provide language specific examples.
I followed this pattern with the Android native communication documentation. It is missing some content that the iOS documentation contains, such as the layout computation flow. But provides a solid base for future efforts.
Ran local instance of React Native website. Went to http://localhost:8079 and read through the new page (react-native/docs/communication-android.html). Also tested links two/from the page.
As a result of this link testing, I updated the Native Modules Android documentation to link to the Apple TV documentation, as it is now the previous page on the navigation sidebar.
Closes https://github.com/facebook/react-native/pull/14316
Differential Revision: D5865137
Pulled By: hramos
fbshipit-source-id: 10ec7d2b08667e70bc38576ecc56da457859e8b1
Summary:
This should be much more performant (and it better illustrates the intension of the code).
The fix was suggested by Adlai-Holler.
Reviewed By: mmmulani
Differential Revision: D5851595
fbshipit-source-id: 45d172a5fa796549c6dcea8f35c5cbb2a4c2d2e0
Summary:
<!--
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Help us understand your motivation by explaining why you decided to make this change.
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-->
Headless tasks are required to run in the main thread, however due to the nature of the React context creation flow, the handler may be returned outside of the main thread, causing the HeadlessJsTaskContext to throw an exception.
Swipe out the app. send push notification from a server that starts a HeadlessJsTaskService
Closes https://github.com/facebook/react-native/pull/15940
Differential Revision: D5852448
Pulled By: foghina
fbshipit-source-id: 54c58a1eb7434dd5de5c39c28f6e068ed15ead9d
Summary:
When we convert nested <Text> components to Spannable object we must enforce the order of spans somehow,
otherwise we will have Spannable object with unpredictable order of spans, which will produce unpredictalbe text layout.
We can do it only using `Spannable.SPAN_PRIORITY` feature because Spannable objects do not maintain the order of spans internally.
We also have to fix this to implement autoexpandable <TextInput>.
Reviewed By: achen1
Differential Revision: D5811172
fbshipit-source-id: 5bc68b869e58aba27d6986581af9fe3343d116a7
Alex Dvornikov
Alexey Lang
Mingwei Pan
Emil Sjolander
Adam Miskiewicz
Adam King
Lukas Wöhrl
Aaron Chiu
Andrew Chen (Eng)
Kathy Gray
Lee Byron
Justin Reynolds
Naman Goel
Christian Brevik
Brian Vaughn
Drew Smith
Trevor Brindle
Valentin Shergin
Chris Lewis
Dmitry Zakharov
David Vacca
Kang Zhang
Tomas Reimers
Max Sherman
Michał Gregorczyk
Paco Estevez Garcia
Ori Harel
Andrew Hansen
Oleksandr Sokolov
Christoph Nakazawa
