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[native] Refactor background opacity to reanimated 2
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Authored by inka on Aug 13 2024, 8:37 AM.
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Details

Summary

issue: ENG-8914
This changes the animation of the backgroud

Test Plan

Tested with following diffs (this is with longer duration, so that the animation can be seen better):

Diff Detail

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Event Timeline

native/tooltip/nux-tips-overlay.react.js
275 ↗(On Diff #43361)

For some reason entering animation is not being accepted by types. I get:

Error ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ tooltip/nux-tips-overlay.react.js:276:23

Cannot create AnimatedView element because in property entering: [incompatible-type]
 • Either function [1] is incompatible with statics of BaseAnimationBuilder [2].
 • Or function [1] is incompatible with BaseAnimationBuilder [3].
 • Or function [1] is incompatible with indexed Keyframe [4].

     tooltip/nux-tips-overlay.react.js
 [1]  83│ function opacityEnteringAnimation() {
        :
     273│           <AnimatedView
     274│             style={styles.backdrop}
     275│             // $FlowFjjjjixMe
     276│             entering={opacityEnteringAnimation}
     277│             exiting={opacityExitingAnimation}
     278│           />
     279│           <View style={contentContainerStyle}>

     flow-typed/npm/react-native-reanimated_v2.x.x.js
 [2] 403│     | Class<BaseAnimationBuilder>
 [3] 404│     | BaseAnimationBuilder;

     types/styles.js
 [4]  56│     | Keyframe,

I created ENG-9093 to investigate, because I wanted to put this stack up for review.

298–307 ↗(On Diff #43361)

This is what allows us to run the exiting animation. We cannot have the exiting animation on the screen, because reanimated doesn't run exit animations is a screen is being unmounted. It has to be a child View.

inka requested review of this revision.Aug 13 2024, 8:54 AM
tomek added inline comments.
native/tooltip/nux-tips-overlay.react.js
89 ↗(On Diff #43375)

Why do we specify the transform only in one animation? Is it needed?

302 ↗(On Diff #43375)

We can consider passing animationCallback directly here, instead of consuming the OverlayContext inside NUXTipsOverlay.

This revision is now accepted and ready to land.Aug 14 2024, 5:50 AM
native/tooltip/nux-tips-overlay.react.js
275 ↗(On Diff #43361)

It's weird that Flow doesn't seem to be considering the EntryAnimationFunction / ExitAnimationFunction branch here. Have you tried calling it with --show-all-branches? (Or am I missing some changes in the types that removes the EntryAnimationFunction / ExitAnimationFunction branch?)

native/tooltip/nux-tips-overlay.react.js
89 ↗(On Diff #43375)

It's not needed, it should be removed

302 ↗(On Diff #43375)

I don't like that. This component has the single responsibility of deciding whether the inner component should be shown or not. The inner component is responsible for animating things. They each take from the context what they need to achieve their goals.
We discussed this offline and agreed this is fine

275 ↗(On Diff #43361)

The branch is present.
yarn flow --show-all-branches native/tooltip/nux-tips-overlay.react.js returns

Error ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ native/tooltip/nux-tips-overlay.react.js:272:23

Cannot create AnimatedView element because in property entering: [incompatible-type]
 • Either function [1] is incompatible with statics of BaseAnimationBuilder [2].
 • Or function [1] is incompatible with BaseAnimationBuilder [3].
 • Or number [4] is not an object.
 • Or function [1] is incompatible with indexed Keyframe [5].

     native/tooltip/nux-tips-overlay.react.js
 [1]  83│ function opacityEnteringAnimation() {
        :
     269│         <View style={styles.container}>
     270│           <AnimatedView
     271│             style={styles.backdrop}
     272│             entering={opacityEnteringAnimation}
     273│             exiting={opacityExitingAnimation}
     274│           />
     275│           <View style={contentContainerStyle}>

     native/flow-typed/npm/react-native-reanimated_v2.x.x.js
 [4]  31│     ...ViewStyleProp,
        :
 [2] 403│     | Class<BaseAnimationBuilder>
 [3] 404│     | BaseAnimationBuilder;

     native/types/styles.js
 [5]  56│     | Keyframe,



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