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1 line
26 KiB
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notify gesture handler manager\nconst {\n setJSResponder: oldSetJSResponder = () => {\n //no operation\n },\n clearJSResponder: oldClearJSResponder = () => {\n //no operation\n },\n} = UIManager;\nUIManager.setJSResponder = (tag: number, blockNativeResponder: boolean) => {\n RNGestureHandlerModule.handleSetJSResponder(tag, blockNativeResponder);\n oldSetJSResponder(tag, blockNativeResponder);\n};\nUIManager.clearJSResponder = () => {\n RNGestureHandlerModule.handleClearJSResponder();\n oldClearJSResponder();\n};\n\nlet handlerTag = 1;\nconst handlerIDToTag: Record<string, number> = {};\n\nfunction isConfigParam(param: unknown, name: string) {\n // param !== Object(param) returns false if `param` is a function\n // or an object and returns true if `param` is null\n return (\n param !== undefined &&\n (param !== Object(param) ||\n !('__isNative' in (param as Record<string, unknown>))) &&\n name !== 'onHandlerStateChange' &&\n name !== 'onGestureEvent'\n );\n}\n\nfunction filterConfig(\n props: Record<string, unknown>,\n validProps: string[],\n defaults: Record<string, unknown> = {}\n) {\n const res = { ...defaults };\n validProps.forEach((key) => {\n const value = props[key];\n if (isConfigParam(value, key)) {\n let value = props[key];\n if (key === 'simultaneousHandlers' || key === 'waitFor') {\n value = transformIntoHandlerTags(props[key]);\n } else if (key === 'hitSlop') {\n if (typeof value !== 'object') {\n value = { top: value, left: value, bottom: value, right: value };\n }\n }\n res[key] = value;\n }\n });\n return res;\n}\n\nfunction transformIntoHandlerTags(handlerIDs: any) {\n if (!Array.isArray(handlerIDs)) {\n handlerIDs = [handlerIDs];\n }\n\n if (Platform.OS === 'web') {\n return handlerIDs\n .map(({ current }: { current: any }) => current)\n .filter((handle: any) => handle);\n }\n // converts handler string IDs into their numeric tags\n return handlerIDs\n .map(\n (handlerID: any) =>\n handlerIDToTag[handlerID] || handlerID.current?.handlerTag || -1\n )\n .filter((handlerTag: number) => handlerTag > 0);\n}\n\ntype HandlerProps<T extends Record<string, unknown>> = Readonly<\n React.PropsWithChildren<BaseGestureHandlerProps<T>>\n>;\nfunction hasUnresolvedRefs<T extends Record<string, unknown>>(\n props: HandlerProps<T>\n) {\n // TODO(TS) - add type for extract arg\n const extract = (refs: any | any[]) => {\n if (!Array.isArray(refs)) {\n return refs && refs.current === null;\n }\n return refs.some((r) => r && r.current === null);\n };\n return extract(props['simultaneousHandlers']) || extract(props['waitFor']);\n}\n\nconst stateToPropMappings = {\n [State.UNDETERMINED]: undefined,\n [State.BEGAN]: 'onBegan',\n [State.FAILED]: 'onFailed',\n [State.CANCELLED]: 'onCancelled',\n [State.ACTIVE]: 'onActivated',\n [State.END]: 'onEnded',\n} as const;\n\ntype CreateHandlerArgs<\n HandlerPropsT extends Record<string, unknown>\n> = Readonly<{\n name: string;\n allowedProps: Readonly<Extract<keyof HandlerPropsT, string>[]>;\n config: Readonly<Record<string, unknown>>;\n transformProps?: (props: HandlerPropsT) => HandlerPropsT;\n customNativeProps?: Readonly<string[]>;\n}>;\n\n// TODO(TS) fix event types\ntype InternalEventHandlers = {\n onGestureHandlerEvent?: (event: any) => void;\n onGestureHandlerStateChange?: (event: any) => void;\n};\n\n// TODO(TS) - make sure that BaseGestureHandlerProps doesn't need other generic parameter to work with custom properties.\nexport default function createHandler<\n T extends BaseGestureHandlerProps<U>,\n U extends Record<string, unknown>\n>({\n name,\n allowedProps = [],\n config = {},\n transformProps,\n customNativeProps = [],\n}: CreateHandlerArgs<T>): React.ComponentType<T & React.RefAttributes<any>> {\n class Handler extends React.Component<T & InternalEventHandlers> {\n static displayName = name;\n\n private handlerTag: number;\n private config: Record<string, unknown>;\n private propsRef: React.MutableRefObject<unknown>;\n private viewNode: any;\n private viewTag?: number;\n private updateEnqueued: ReturnType<typeof setImmediate> | null = null;\n\n constructor(props: T & InternalEventHandlers) {\n super(props);\n this.handlerTag = handlerTag++;\n this.config = {};\n this.propsRef = React.createRef();\n if (props.id) {\n if (handlerIDToTag[props.id] !== undefined) {\n throw new Error(`Handler with ID \"${props.id}\" already registered`);\n }\n handlerIDToTag[props.id] = this.handlerTag;\n }\n }\n\n componentDidMount() {\n const props: HandlerProps<U> = this.props;\n if (hasUnresolvedRefs(props)) {\n // If there are unresolved refs (e.g. \".current\" has not yet been set)\n // passed as `simultaneousHandlers` or `waitFor`, we enqueue a call to\n // _update method that will try to update native handler props using\n // setImmediate. This makes it so _update function gets called after all\n // react components are mounted and we expect the missing ref object to\n // be resolved by then.\n this.updateEnqueued = setImmediate(() => {\n this.updateEnqueued = null;\n this.update();\n });\n }\n\n this.createGestureHandler(\n filterConfig(\n transformProps ? transformProps(this.props) : this.props,\n [...allowedProps, ...customNativeProps],\n config\n )\n );\n\n this.attachGestureHandler(findNodeHandle(this.viewNode) as number); // TODO(TS) - check if this can be null\n }\n\n componentDidUpdate() {\n const viewTag = findNodeHandle(this.viewNode);\n if (this.viewTag !== viewTag) {\n this.attachGestureHandler(viewTag as number); // TODO(TS) - check interaction between _viewTag & findNodeHandle\n }\n this.update();\n }\n\n componentWillUnmount() {\n RNGestureHandlerModule.dropGestureHandler(this.handlerTag);\n if (this.updateEnqueued) {\n clearImmediate(this.updateEnqueued);\n }\n // We can't use this.props.id directly due to TS generic type narrowing bug, see https://github.com/microsoft/TypeScript/issues/13995 for more context\n const handlerID: string | undefined = this.props.id;\n if (handlerID) {\n // eslint-disable-next-line @typescript-eslint/no-dynamic-delete\n delete handlerIDToTag[handlerID];\n }\n }\n\n private onGestureHandlerEvent = (event: GestureEvent<U>) => {\n if (event.nativeEvent.handlerTag === this.handlerTag) {\n this.props.onGestureEvent?.(event);\n } else {\n this.props.onGestureHandlerEvent?.(event);\n }\n };\n\n // TODO(TS) - make sure this is right type for event\n private onGestureHandlerStateChange = (\n event: HandlerStateChangeEvent<U>\n ) => {\n if (event.nativeEvent.handlerTag === this.handlerTag) {\n this.props.onHandlerStateChange?.(event);\n\n const state: ValueOf<typeof State> = event.nativeEvent.state;\n const stateEventName = stateToPropMappings[state];\n const eventHandler = stateEventName && this.props[stateEventName];\n if (eventHandler && typeof eventHandler === 'function') {\n eventHandler(event);\n }\n } else {\n this.props.onGestureHandlerStateChange?.(event);\n }\n };\n\n private refHandler = (node: any) => {\n this.viewNode = node;\n\n const child = React.Children.only(this.props.children);\n // TODO(TS) fix ref type\n const { ref }: any = child;\n if (ref !== null) {\n if (typeof ref === 'function') {\n ref(node);\n } else {\n ref.current = node;\n }\n }\n };\n\n private createGestureHandler = (\n newConfig: Readonly<Record<string, unknown>>\n ) => {\n this.config = newConfig;\n\n RNGestureHandlerModule.createGestureHandler(\n name,\n this.handlerTag,\n newConfig\n );\n };\n\n private attachGestureHandler = (newViewTag: number) => {\n this.viewTag = newViewTag;\n\n if (Platform.OS === 'web') {\n // typecast due to dynamic resolution, attachGestureHandler should have web version signature in this branch\n (RNGestureHandlerModule.attachGestureHandler as typeof RNGestureHandlerModuleWeb.attachGestureHandler)(\n this.handlerTag,\n newViewTag,\n this.propsRef\n );\n } else {\n RNGestureHandlerModule.attachGestureHandler(\n this.handlerTag,\n newViewTag\n );\n }\n };\n\n private updateGestureHandler = (\n newConfig: Readonly<Record<string, unknown>>\n ) => {\n this.config = newConfig;\n\n RNGestureHandlerModule.updateGestureHandler(this.handlerTag, newConfig);\n };\n\n private update() {\n const newConfig = filterConfig(\n transformProps ? transformProps(this.props) : this.props,\n [...allowedProps, ...customNativeProps],\n config\n );\n if (!deepEqual(this.config, newConfig)) {\n this.updateGestureHandler(newConfig);\n }\n }\n\n setNativeProps(updates: any) {\n const mergedProps = { ...this.props, ...updates };\n const newConfig = filterConfig(\n transformProps ? transformProps(mergedProps) : mergedProps,\n [...allowedProps, ...customNativeProps],\n config\n );\n this.updateGestureHandler(newConfig);\n }\n\n render() {\n let gestureEventHandler = this.onGestureHandlerEvent;\n // Another instance of https://github.com/microsoft/TypeScript/issues/13995\n type OnGestureEventHandlers = {\n onGestureEvent?: BaseGestureHandlerProps<U>['onGestureEvent'];\n onGestureHandlerEvent?: InternalEventHandlers['onGestureHandlerEvent'];\n };\n const {\n onGestureEvent,\n onGestureHandlerEvent,\n }: OnGestureEventHandlers = this.props;\n if (onGestureEvent && typeof onGestureEvent !== 'function') {\n // If it's not a method it should be an native Animated.event\n // object. We set it directly as the handler for the view\n // In this case nested handlers are not going to be supported\n if (onGestureHandlerEvent) {\n throw new Error(\n 'Nesting touch handlers with native animated driver is not supported yet'\n );\n }\n gestureEventHandler = onGestureEvent;\n } else {\n if (\n onGestureHandlerEvent &&\n typeof onGestureHandlerEvent !== 'function'\n ) {\n throw new Error(\n 'Nesting touch handlers with native animated driver is not supported yet'\n );\n }\n }\n\n let gestureStateEventHandler = this.onGestureHandlerStateChange;\n // Another instance of https://github.com/microsoft/TypeScript/issues/13995\n type OnGestureStateChangeHandlers = {\n onHandlerStateChange?: BaseGestureHandlerProps<U>['onHandlerStateChange'];\n onGestureHandlerStateChange?: InternalEventHandlers['onGestureHandlerStateChange'];\n };\n const {\n onHandlerStateChange,\n onGestureHandlerStateChange,\n }: OnGestureStateChangeHandlers = this.props;\n if (onHandlerStateChange && typeof onHandlerStateChange !== 'function') {\n // If it's not a method it should be an native Animated.event\n // object. We set it directly as the handler for the view\n // In this case nested handlers are not going to be supported\n if (onGestureHandlerStateChange) {\n throw new Error(\n 'Nesting touch handlers with native animated driver is not supported yet'\n );\n }\n gestureStateEventHandler = onHandlerStateChange;\n } else {\n if (\n onGestureHandlerStateChange &&\n typeof onGestureHandlerStateChange !== 'function'\n ) {\n throw new Error(\n 'Nesting touch handlers with native animated driver is not supported yet'\n );\n }\n }\n const events = {\n onGestureHandlerEvent: gestureEventHandler,\n onGestureHandlerStateChange: gestureStateEventHandler,\n };\n\n this.propsRef.current = events;\n\n const child: any = React.Children.only(this.props.children);\n let grandChildren = child.props.children;\n if (\n Touchable.TOUCH_TARGET_DEBUG &&\n child.type &&\n (child.type === 'RNGestureHandlerButton' ||\n child.type.name === 'View' ||\n child.type.displayName === 'View')\n ) {\n grandChildren = React.Children.toArray(grandChildren);\n grandChildren.push(\n Touchable.renderDebugView({\n color: 'mediumspringgreen',\n hitSlop: child.props.hitSlop,\n })\n );\n }\n\n return React.cloneElement(\n child,\n {\n ref: this.refHandler,\n collapsable: false,\n ...events,\n },\n grandChildren\n );\n }\n }\n return Handler;\n}\n"]} |