Summary:
Because it is not simply flushing, it (in the future) is more complex process. And the names should represent logical meaning of the process, not particular implementation details.
It also nice to have unified terminology across our reactive UI frameworks.
See the next diffs.
Reviewed By: rsnara
Differential Revision: D6436770
fbshipit-source-id: 0a0b686e8ace89e30f6787a37c0a7965c5af757b
Summary: Because `RCTUIManager` is already overcomplicated and that stuff deserves separate file and header.
Reviewed By: javache
Differential Revision: D5856653
fbshipit-source-id: 7001bb8ba611976bf3b82d6a25f5619810a35b34
Summary:
Instead of preventing events from working when not on the UI Thread we can just dispatch to it instead.
**Test plan**
Tested manually that animated events still work in RNTester
Closes https://github.com/facebook/react-native/pull/15953
Differential Revision: D5909816
Pulled By: shergin
fbshipit-source-id: 48d02b6aa9f2bc3bcb638e8852fccaac3f205276
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:
Hi React Native folks! Love your work!
To make contributing easier, this sets the indentation settings of all the Xcode projects to 2 spaces to match their contents.
Closes https://github.com/facebook/react-native/pull/15275
Differential Revision: D5526462
Pulled By: javache
fbshipit-source-id: cbf0a8a87a1dbe31fceed2f0fffc53839cc06e59
Summary:
This diff changes the behaviour of natively driven animations in case the node that they are being run for has its value changed using `setValue` or as a result of an incoming event.
The reason for changing that is to match the JS implementation of `setValue` which behaves as described above (see relevant code here: 7cdd4d48c8/Libraries/Animated/src/AnimatedImplementation.js (L743))
**Test Plan:**
Use this sample app: https://snack.expo.io/B1V7RX9r-
Change: `USE_NATIVE_DRIVER` const between `true` and `false`.
See the animation stops regardless of the state of `USE_NATIVE_DRIVER` unlike before when it would stop only when `USE_NATIVE_DRIVER` was set to `false`
Closes https://github.com/facebook/react-native/pull/15054
Differential Revision: D5463750
Pulled By: hramos
fbshipit-source-id: e164c5299588ba8cac2937260c9ba9f6053b04e5
Summary:
Follow up to #11973 to add support to Animated.loop with useNativeDriver on iOS.
**Test plan**
Test with new UIExplorer example
Run unit tests
Closes https://github.com/facebook/react-native/pull/13359
Differential Revision: D4960754
Pulled By: javache
fbshipit-source-id: caa840281f1b060df7a2b1c50405fcae1e1b0de6
Summary:
There was an edge case where sometimes a view could be added and removed in the same batch so this caused issues because we ran `disconnectAnimatedNodeFromView` before `connectAnimatedNodeToView`. This separates restoring default values from `disconnectAnimatedNodeFromView` so we can run only `restoreDefaultValues` on the pre-operations queue and just do nothing in case the view doesn't exist (it is fine because we know it will be removed immediately).
**Test plan**
Tested that native animations still work properly in RNTester and tested that the edge case crash was fixed.
Closes https://github.com/facebook/react-native/pull/14114
Differential Revision: D5128989
Pulled By: javache
fbshipit-source-id: 9f47a2d3aafeb06d8ed1a4dd1800b8af225edb7d
Summary:
This is one of the last feature that is missing from native animated, it was already supported on Android and this implementation is based on it.
**Test plan**
Test that the existing decay animation example now works on iOS
Run unit tests
Closes https://github.com/facebook/react-native/pull/13368
Differential Revision: D4938061
Pulled By: javache
fbshipit-source-id: 36b57b1029a542e9daf21e048a06d3b3347e9659
Summary:
Not sure if this is the proper fix but changing PRODUCT_NAME to RCTAnimation did the trick. Also using `#import "RCTValueAnimatedNode.h"` instead of `#import <RCTAnimation/RCTValueAnimatedNode.h>` in `RCTNativeAnimatedNodesManager.h` can work too.
Closes https://github.com/facebook/react-native/pull/13190
Differential Revision: D4794401
Pulled By: javache
fbshipit-source-id: c33232a676131644afa80e34ca7a1516a2c89f7e
Summary:
This call got lost in the refactor of #11819 and caused some view updating issues.
Closes https://github.com/facebook/react-native/pull/13183
Differential Revision: D4787565
Pulled By: javache
fbshipit-source-id: 8f7d456824c67abee6ac1d5f906e4c831ede889b
Summary:
Adds unit tests to the Native Animated implementation on iOS. This pretty much mirrors the tests we currently have on Android.
It also fixes 2 bugs I've found when adding the tests and pass the current time in `stepAnimation` instead of using `CACurrentMediaTime` to make testing easier.
- `stopListeningToAnimatedNodeValue` did not actually work at all, it should set the listener to nil.
- The finished value in the animation end callback was always true, this simplifies the `RCTAnimationDriver` interface to get rid of `removeAnimation` and fixes the end callback value.
**Test plan**
- Run the tests
- Make sure the UIExplorer example still works
Closes https://github.com/facebook/react-native/pull/13068
Differential Revision: D4786701
Pulled By: javache
fbshipit-source-id: a4f07e6eec1f363ca47b6f27984041793c915bfc
Summary:
Delay was broken with native animations on iOS. After checking what android does to handle delay, I noticed it does nothing at all since the delay is already handled when generating the animation frames. This removes all code that tried to handle delay on iOS since it is not needed and breaks it. Also updated an example to have delay in UI explorer.
Fixes#12388
**Test plan**
Tested that delay works in UIExplorer on iOS and Android.
Closes https://github.com/facebook/react-native/pull/12443
Differential Revision: D4582514
Pulled By: javache
fbshipit-source-id: dc53295e716c8476c71ccd578380962f056de2be
Summary:
This fixes a bug that causes properties to keep stale values because they were not restored to their default after being removed when their value was controlled by native animated.
To fix this we restore default values in `disconnectFromView` by updating views with null values for all props that we modified previously. However this causes another issue where we lose any props that were set by the normal process because NativeAnimated operations are always executed after UIManager operatations. To fix this I added a way to hook into UIManager view updating process to be able to execute NativeAnimated operations either before or after updating native views.
In the case of disconnecting we want to do it before updating views so that it does: Value changed by native animated -> value restored to default -> (optional) value updated by normal prop.
This PR also depends on #10658.
**Test plan**
Tested that this fixed a particular bug in an app that uses ex-navigation + native animations where a navbar w
Closes https://github.com/facebook/react-native/pull/11819
Differential Revision: D4752566
Pulled By: javache
fbshipit-source-id: 68ee28200ffeba859ae1b98ac753bd7dcb8910f0
Summary:
This is enforced for all of our internal iOS code and a common cause of import failures.
cc janicduplessis
Closes https://github.com/facebook/react-native/pull/13124
Differential Revision: D4765016
fbshipit-source-id: 7c8248c98bca0fa6bad24d5a52b666243375e0db
Summary:
Re-applying the diff that was reverted in D4659669 / b87f4abf78 because of some crashes with fixes from D4659708 merged in.
---
Fixes a bug that happens when trying to use ScrollView with sticky headers and native `Animated.event` with `onScroll`. Made a few changes to the ListViewPaging UIExplorer example to repro https://gist.github.com/janicduplessis/17e2fcd99c6ea49ced2954d881011b09.
What happens is we need to be able to add multiple events to the same prop + viewTag pair. To do that I simple changed the data structure to `Map<prop+viewTag, List<AnimatedEventDriver>>` and try to optimize for the case where there is only one item in the list since it will be the case 99% of the time.
**Test plan**
Tested by reproducing the bug with the above gist and made sure it was fixed after applying this diff.
Closes https://github.com/facebook/react-native/pull/12697
Reviewed By: fkgozali
Differential Revision: D4661105
Pulled By: sahrens
fbshipit-source-id: c719dc85f45c1a142ef5b9ebfe0a82ae8ec66497
Summary:
Fixes a bug that happens when trying to use ScrollView with sticky headers and native `Animated.event` with `onScroll`. Made a few changes to the ListViewPaging UIExplorer example to repro https://gist.github.com/janicduplessis/17e2fcd99c6ea49ced2954d881011b09.
What happens is we need to be able to add multiple events to the same prop + viewTag pair. To do that I simple changed the data structure to `Map<prop+viewTag, List<AnimatedEventDriver>>` and try to optimize for the case where there is only one item in the list since it will be the case 99% of the time.
**Test plan**
Tested by reproducing the bug with the above gist and made sure it was fixed after applying this diff.
Closes https://github.com/facebook/react-native/pull/12697
Differential Revision: D4656347
Pulled By: sahrens
fbshipit-source-id: b5c36ba796f478e56028c7a95bc0f86bc54cb2ce
Summary:
In theory, we should be able to animate any non-layout property, including custom ones. While there is still work to be done on the native side to fully enable this, we should start by dropping the prop whitelist.
Closes https://github.com/facebook/react-native/pull/10658
Differential Revision: D4379031
Pulled By: ericvicenti
fbshipit-source-id: fe9c30ea101e93a8b260d7d09a909fafbb82fee6
Summary:
Xcode really sucks, per some discussion on e1577df1fd and https://developer.apple.com/library/content/technotes/tn2215/_index.html, if you use the headers phase, and mark headers in your static library as public, they will actually end up in the final package that's built and you can't submit to the app store! This changes our xcode setup to use a copy files phase instead.
I've also changed the header include path to be $(BUILT_PRODUCTS_DIR)/include, which is added to the include path by Xcode by default, so 3rd party libraries should not be impacted by these changes anymore.
Reviewed By: mkonicek
Differential Revision: D4291607
fbshipit-source-id: 969b9ebcbeb8161f85427f8c429e198d9d0fae30
Summary:
This diff attempts to fix a number of iOS native animation bugs related to improper node invalidation and a race with view creation. The major issues were presented in #9120 as problems 3 and 3b, but I'll recap here:
The invalidation model we use is overly complicated and incomplete. The proper combination of `_needsUpdate` and `_hasUpdated` will result in nodes values being recomputed. However, we do not invalidate nodes in all the places we should, e.g. if we create a new view and attach it to an existing value node (see example in #9120). This diff chooses to remove the `_hasUpdated` flag, and simply relies on the `_needsUpdate` flag to mark a node as dirty.
We mark nodes as dirty when they are:
- created
- updated
- attached to new parents
- detached from old parents
- attached to a view
Calling `updateNodeIfNecessary` will, if necessary, compute all invalidated parent values before recomputing the node value. It will then apply the update, and mark the no
Closes https://github.com/facebook/react-native/pull/10663
Differential Revision: D4120301
Pulled By: mkonicek
fbshipit-source-id: e247afcb5d8c15999b8328c664b9f7e764d76a75
Summary:
To make React Native play nicely with our internal build infrastructure we need to properly namespace all of our header includes.
Where previously you could do `#import "RCTBridge.h"`, you must now write this as `#import <React/RCTBridge.h>`. If your xcode project still has a custom header include path, both variants will likely continue to work, but for new projects, we're defaulting the header include path to `$(BUILT_PRODUCTS_DIR)/usr/local/include`, where the React and CSSLayout targets will copy a subset of headers too. To make Xcode copy headers phase work properly, you may need to add React as an explicit dependency to your app's scheme and disable "parallelize build".
Reviewed By: mmmulani
Differential Revision: D4213120
fbshipit-source-id: 84a32a4b250c27699e6795f43584f13d594a9a82
Summary:
When native events where handled they were not sent to JS as an optimization but this caused some issues. One of the major one is touches are not handled properly inside a ScrollView with an Animated.event because it doesn't receive scroll events so it can't cancel the touch if the user scrolled.
Closes https://github.com/facebook/react-native/pull/10981
Differential Revision: D4226403
Pulled By: astreet
fbshipit-source-id: 41278d3ed4b684af142d9e273b11b974eb679879
Summary: Correct header import paths, update podspec so we point at the copy in ReactCommon (and can eventually remove the copy under React)
Reviewed By: astreet
Differential Revision: D4204501
fbshipit-source-id: e979a010092f025b2cdc289e1e5f22fc7b65a8d1
Summary:
`flattenOffset` has proven extremely useful, especially when dealing with pan responders and other gesture based animations, but I've also found a number of use cases for the inverse. This diff introduces `extractOffset`, which sets the offset value to the base value, and resets the base value to zero. A common use case would be to extractOffset onGrant and flattenOffset onRelease.
Closes https://github.com/facebook/react-native/pull/10721
Differential Revision: D4145744
fbshipit-source-id: dc2aa31652df0b31450556f611db43548180c7dd
Summary:
This adds native support for `Animated.event` on iOS.
**Test plan**
Tested in the native animated UIExplorer example that it works properly like on Android.
Closes https://github.com/facebook/react-native/pull/9598
Differential Revision: D4110331
fbshipit-source-id: 15748d23d0f475f2bcd1040ca3dca33e2620f058
Summary:
Support static values (non-animated) in transform config like Android already does.
**Test plan**
Tested in UIExplorer native animated example by adding a transform with a static value and comparing with JS.
Closes https://github.com/facebook/react-native/pull/10664
Differential Revision: D4109515
fbshipit-source-id: 2d7de17d51d6df835c569fd45d2de8fc170bf928
Summary:
`setAnimatedNodeValue` currently does not update views if there is no animation currently running. This simply updates the view immediately instead of relying on the animation loop. Extracted it out in a function to be able to use it for native `Animated.event` too.
**Test plan**
Tested this in an app using native driven animations with `NavigationCardStackPanResponder` that makes use of `setValue` to update `Animated.Values` during the back gesture.
Closes https://github.com/facebook/react-native/pull/10643
Differential Revision: D4106346
fbshipit-source-id: 7c639e03ded87058354340f1179f8b75be423e84
Summary:
This diff adds support for native spring animations on iOS. This overlaps some spring work done by kmagiera on the Android side of things.
**Test plan (required)**
Run UIExplorer NativeAnimated examples before and after - compare the results. Pay special attention to the spring examples.
Closes https://github.com/facebook/react-native/pull/9048
Differential Revision: D4056088
Pulled By: foghina
fbshipit-source-id: a593408cb61cb850572bab4a0884f7157cece656
Summary:
This diff adds support for clamping on iOS. It separates out code originally submitted in #9048.
Test plan (required)
Run UIExplorer NativeAnimated examples before and after - compare the results. Pay special attention to the new clamped spring example.
Closes https://github.com/facebook/react-native/pull/9625
Differential Revision: D4053231
fbshipit-source-id: 29048de444ff5f6d7fe7dce7897399b483ee6d2d
Summary:
* Motivation *
Second PR for Apple TV support.
* Test plan *
Apple TV tests have been added to scripts/objc-test.sh
Closes https://github.com/facebook/react-native/pull/10227
Differential Revision: D3974064
Pulled By: javache
fbshipit-source-id: 36dffb4517efa489e40fa713a30655d1d76ef646
Summary:
Combining 2 animated values via addition, multiplication, and modulo are already supported, and this adds another one: division.
There are some cases where an animated value needs to invert (1 / x) another animated value for calculation. An example is inverting a scale (2x --> 0.5x), e.g.:
```
const a = Animated.Value(1);
const b = Animated.divide(1, a);
Animated.spring(a, {
toValue: 2,
}).start();
```
`b` will then follow `a`'s spring animation and produce the value of `1 / a`.
The basic usage is like this:
```
<Animated.View style={{transform: [{scale: a}]}}>
<Animated.Image style={{transform: [{scale: b}]}} />
<Animated.View>
```
In this example, the inner image won't get stretched at all because the parent's scaling gets cancelled out.
Also added this to native animated implementation.
Reviewed By: foghina, mmmulani
Differential Revision: D3922891
fbshipit-source-id: 32508956c4b65b2deb7574d50a10c85b4809b961
Summary:
This diff adds support for value offsets on iOS. It separates out code originally submitted in #9048.
Test plan (required)
Set up an animation with an offset, and `useNativeModule: true`. Compare results with `useNativeModule: false`.
Closes https://github.com/facebook/react-native/pull/9627
Differential Revision: D3924410
fbshipit-source-id: 8177a25a5f6b9e33f00ea66143c782aeea24507d
Summary:
Add native support on iOS and Android for `Animated.diffClamp` that was added in #9419.
**Test plan**
Tested that it works properly using the native animations UIExplorer example.
Closes https://github.com/facebook/react-native/pull/9691
Differential Revision: D3813440
fbshipit-source-id: 48a3ecddf3708fa44b408954d3d8133ec8537f21
Summary:
This diff adds ModuloAnimatedNode on iOS. It separates out code originally submitted in #9048.
Test plan (required)
Set up an animation with a modulo node, and `useNativeModule: true`. Compare results with `useNativeModule: false`.
Closes https://github.com/facebook/react-native/pull/9626
Differential Revision: D3799636
fbshipit-source-id: 594499f11be41bf3ee709249056a3feedeace9eb
Summary:
Adds support for `Animated.Value#addListener` for native driven animated values. Same as #8844 but for iOS. This depends on some JS code in #8844 so only review the 2nd commit and let's wait for #8844 to land first.
**Test plan**
Tested using the UIExplorer example.
Closes https://github.com/facebook/react-native/pull/9194
Differential Revision: D3681749
fbshipit-source-id: 521a61e2221c1ad1f6f40c75dd2dc957361d0271
Summary:
We're mutating dictionaries on one thread for bookkeeping (anytime we receive a call over the bridge) and iterating over them on the main thread each frame (in `updateAnimations`). Seems like this can all happen on the main thread without issue. Am I missing something?
**Test plan (required)**
Run UIExplorer NativeAnimated examples before and after - compare the results. Nothing should have changed.
Closes https://github.com/facebook/react-native/pull/9049
Differential Revision: D3682871
fbshipit-source-id: c6de62063e724b15b9678a9ef0290284e928b31b
Summary:
This adds support for the `transform` animated node. This brings feature parity with the iOS implementation and allows running the NativeAnimated UIExplorer example that was created with the iOS implementation on Android. This is based on some work by kmagiera in the exponent RN fork.
This also adds support for mixing static values with animated ones in the same transform as well which is not supported on iOS at the moment. It is also implemented in a way that rebuilds the transform matrix the same way as we build it in JS so it will be easy to remove some of the current limitations like forcing the transforms order and only supporting one of each type.
**Test plan (required)**
Tested with the NativeAnimated example on Android and iOS. Also tested mixing in static values in a transform (`[{ rotate: '45deg' }, { translateX: animatedValue }]`).
Closes https://github.com/facebook/react-native/pull/8839
Differential Revision: D3682143
fbshipit-source-id: 5e6fd4b0b8be6a76053f24a36d1785771690a6f8
Summary:
The `NativeAnimationsExample` in Android can not work due to inputRange and outputRange were limited to double array type, which is different from iOS.
So we need let android version to support string array type.
Closes https://github.com/facebook/react-native/pull/8900
Differential Revision: D3674754
fbshipit-source-id: e7844f00940bf0fdd6f7f5003dd4eeefa0c317a0
Summary:
This diff addresses the issues raised by kmagiera in https://github.com/facebook/react-native/pull/7884. Transforms should be applied in the order they are defined, just like in `processTransform.js`. A scale applied before a translation, for instance, should give a different result than a translation applied before a scale.
We leverage CATransform3D to do the heavy lifting. A concatenated transform is passed all the way to `RCTViewPropertyMapper`. It is compared with the transform currently applied to the view, and if different, applied. The same approach is used for opacity.
I think it makes the most sense to do this diffing in `RCTViewPropertyMapper`, as opposed to creating and cleaning up an `_updatedPropsDictionary` each frame in `RCTTransformAnimatedNode` and `RCTStyleAnimatedNode`. The node should keep its full value; applying a minimal set of altered props is an optimization. The higher up this optimization is implemented, the more assumptions it makes. e.g. that there will only ever be a sing
Closes https://github.com/facebook/react-native/pull/9050
Differential Revision: D3658139
fbshipit-source-id: ad6286762ef734084cbdf83c9bd9241190302d34
Summary:
`Animated.parallel` among other functions expects the `start(callback)` function to be invoked with an `endState` object. Currently natively driven animations call the handler with `null`, this PR changes that to `{ finished: true }`.
**Test plan**
This should not throw any errors:
```js
Animated.parallel([
Animated.timing(
new Animated.Value(0),
{
toValue: 1,
useNativeDriver: true
}
),
Animated.timing(
new Animated.Value(0),
{
toValue: 1,
useNativeDriver: true
}
)
]).start();
```
Closes https://github.com/facebook/react-native/pull/8567
Differential Revision: D3517291
Pulled By: javache
fbshipit-source-id: 0056a5b4261546b061451c0b1b249718739086bc
Summary:
Currently on iOS animations are being performed on the JS thread. This ports animations over to the native thread and performs them natively. A lot of this work has already been done on Android, but this PR enables a few animation nodes that Android doesn't yet support such as Transform, Multiplication, and Addition nodes.
Also there is a demo of the native animations added to the UIExplorer app.
Closes https://github.com/facebook/react-native/pull/7884
Reviewed By: javache
Differential Revision: D3409179
Pulled By: nicklockwood
fbshipit-source-id: ef2d8840032e0c32f49e4a16ba86d448662e1751
Summary:
Currently on iOS animations are being performed on the JS thread. This ports animations over to the native thread and performs them natively. A lot of this work has already been done on Android, but this PR enables a few animation nodes that Android doesn't yet support such as Transform, Multiplication, and Addition nodes.
Also there is a demo of the native animations added to the UIExplorer app.
Closes https://github.com/facebook/react-native/pull/7884
Differential Revision: D3401811
Pulled By: nicklockwood
fbshipit-source-id: 709e533243130153febef03ddd60d39e9fe70e3e
Summary:
Currently on iOS animations are being performed on the JS thread. This ports animations over to the native thread and performs them natively. A lot of this work has already been done on Android, but this PR enables a few animation nodes that Android doesn't yet support such as Transform, Multiplication, and Addition nodes.
Also there is a demo of the native animations added to the UIExplorer app.
Closes https://github.com/facebook/react-native/pull/7884
Differential Revision: D3401811
Pulled By: nicklockwood
fbshipit-source-id: c8d750b75e4410923e17eaeb6dcaf079a09942e2
Valentin Shergin
Janic Duplessis
Adam Miskiewicz
Adlai Holler
Krzysztof Magiera
Pieter De Baets
Jiajie Zhu
Mathieu Baudet
Ryan Gomba
Sokovikov
Pieter De Baets
James Ide
Douglas Lowder
Kevin Gozali
leeight
Joel Arvidsson
Brandon Withrow