react-native-draggable-flatlist/lib/module/context/nestableScrollContainerContext.js

A drag-and-drop-enabled FlatList component for React Native

import React, { useContext, useMemo, useRef, useState } from "react";
import { useSharedValue } from "react-native-reanimated";
const NestableScrollContainerContext = /*#__PURE__*/React.createContext(undefined);

function useSetupNestableScrollContextValue(_ref) {
  let {
    forwardedRef
  } = _ref;
  const [outerScrollEnabled, setOuterScrollEnabled] = useState(true);
  const scrollViewSize = useSharedValue(0);
  const scrollableRefInner = useRef(null);
  const scrollableRef = forwardedRef || scrollableRefInner;
  const outerScrollOffset = useSharedValue(0);
  const containerSize = useSharedValue(0);
  const contextVal = useMemo(() => ({
    outerScrollEnabled,
    setOuterScrollEnabled,
    outerScrollOffset,
    scrollViewSize,
    scrollableRef,
    containerSize
  }), [outerScrollEnabled]);
  return contextVal;
}

export function NestableScrollContainerProvider(_ref2) {
  let {
    children,
    forwardedRef
  } = _ref2;
  const contextVal = useSetupNestableScrollContextValue({
    forwardedRef
  });
  return /*#__PURE__*/React.createElement(NestableScrollContainerContext.Provider, {
    value: contextVal
  }, children);
}
export function useNestableScrollContainerContext() {
  const value = useContext(NestableScrollContainerContext);
  return value;
}
export function useSafeNestableScrollContainerContext() {
  const value = useNestableScrollContainerContext();

  if (!value) {
    throw new Error("useSafeNestableScrollContainerContext must be called within a NestableScrollContainerContext.Provider");
  }

  return value;
}
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