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Define HostInstance type for React Native #31101

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merged 1 commit into from
Oct 2, 2024
+12 −17
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Define HostInstance type for React Native #31101

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29 changes: 12 additions & 17 deletions packages/react-native-renderer/src/ReactNativeTypes.js
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Original file line number Diff line number Diff line change
Expand Up @@ -112,31 +112,32 @@ export interface INativeMethods {
measure(callback: MeasureOnSuccessCallback): void;
measureInWindow(callback: MeasureInWindowOnSuccessCallback): void;
measureLayout(
relativeToNativeNode: number | ElementRef<HostComponent<mixed>>,
relativeToNativeNode: number | HostInstance,
onSuccess: MeasureLayoutOnSuccessCallback,
onFail?: () => void,
): void;
setNativeProps(nativeProps: {...}): void;
}

export type NativeMethods = $ReadOnly<{|
export type NativeMethods = $ReadOnly<{
blur(): void,
focus(): void,
measure(callback: MeasureOnSuccessCallback): void,
measureInWindow(callback: MeasureInWindowOnSuccessCallback): void,
measureLayout(
relativeToNativeNode: number | ElementRef<HostComponent<mixed>>,
relativeToNativeNode: number | HostInstance,
onSuccess: MeasureLayoutOnSuccessCallback,
onFail?: () => void,
): void,
setNativeProps(nativeProps: {...}): void,
|}>;
}>;

// This validates that INativeMethods and NativeMethods stay in sync using Flow!
declare const ensureNativeMethodsAreSynced: NativeMethods;
(ensureNativeMethodsAreSynced: INativeMethods);

export type HostComponent<T> = AbstractComponent<T, $ReadOnly<NativeMethods>>;
export type HostInstance = NativeMethods;
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I tried to make this INativeMethods, but that's going to require its own initiative.

Too many call sites are relying on the ability to spread this type into another object type in order to augment it. (Questionable, but alas… the codebase must grow.)

export type HostComponent<Config> = AbstractComponent<Config, HostInstance>;

type SecretInternalsType = {
computeComponentStackForErrorReporting(tag: number): string,
Expand Down Expand Up @@ -209,7 +210,7 @@ export type RenderRootOptions = {
export type ReactNativeType = {
findHostInstance_DEPRECATED<TElementType: ElementType>(
componentOrHandle: ?(ElementRef<TElementType> | number),
): ?ElementRef<HostComponent<mixed>>,
): ?HostInstance,
findNodeHandle<TElementType: ElementType>(
componentOrHandle: ?(ElementRef<TElementType> | number),
): ?number,
Expand All @@ -218,14 +219,11 @@ export type ReactNativeType = {
child: PublicInstance | HostComponent<mixed>,
): boolean,
dispatchCommand(
handle: ElementRef<HostComponent<mixed>>,
handle: HostInstance,
command: string,
args: Array<mixed>,
): void,
sendAccessibilityEvent(
handle: ElementRef<HostComponent<mixed>>,
eventType: string,
): void,
sendAccessibilityEvent(handle: HostInstance, eventType: string): void,
render(
element: MixedElement,
containerTag: number,
Expand All @@ -247,20 +245,17 @@ type PublicTextInstance = mixed;
export type ReactFabricType = {
findHostInstance_DEPRECATED<TElementType: ElementType>(
componentOrHandle: ?(ElementRef<TElementType> | number),
): ?ElementRef<HostComponent<mixed>>,
): ?HostInstance,
findNodeHandle<TElementType: ElementType>(
componentOrHandle: ?(ElementRef<TElementType> | number),
): ?number,
dispatchCommand(
handle: ElementRef<HostComponent<mixed>>,
handle: HostInstance,
command: string,
args: Array<mixed>,
): void,
isChildPublicInstance(parent: PublicInstance, child: PublicInstance): boolean,
sendAccessibilityEvent(
handle: ElementRef<HostComponent<mixed>>,
eventType: string,
): void,
sendAccessibilityEvent(handle: HostInstance, eventType: string): void,
render(
element: MixedElement,
containerTag: number,
Expand Down
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