@quidone/react-native-wheel-picker/dest/module/hoc/virtualized/VirtualizedList.js

Picker is a UI component for selecting an item from a list of options.

function _extends() { _extends = Object.assign ? Object.assign.bind() : function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }
import React, { forwardRef, memo, useCallback, useMemo } from 'react';
import { Animated, StyleSheet } from 'react-native';
import { withScrollEndEvent } from '../../utils/scrolling';
// TODO "any" is not an exact type. How to pass the generic type?
const ExtendedAnimatedFlatList = withScrollEndEvent(Animated.FlatList);
const VirtualizedList = (_ref, forwardedRef) => {
  let {
    initialIndex,
    data,
    keyExtractor,
    renderItem,
    itemHeight,
    pickerHeight,
    visibleItemCount,
    readOnly,
    scrollOffset,
    onTouchEnd,
    onTouchStart,
    onTouchCancel,
    onScrollEnd,
    contentContainerStyle: contentContainerStyleProp,
    initialNumToRender,
    maxToRenderPerBatch,
    updateCellsBatchingPeriod = 10,
    windowSize,
    ...restProps
  } = _ref;
  const snapToOffsets = useMemo(() => data.map((_, i) => i * itemHeight), [data, itemHeight]);
  const onScroll = useMemo(() => Animated.event([{
    nativeEvent: {
      contentOffset: {
        y: scrollOffset
      }
    }
  }], {
    useNativeDriver: true
  }), [scrollOffset]);
  const getItemLayout = useCallback((_, index) => ({
    length: itemHeight,
    offset: itemHeight * index,
    index
  }), [itemHeight]);
  const contentContainerStyle = useMemo(() => {
    return [{
      paddingVertical: (pickerHeight - itemHeight) / 2
    }, contentContainerStyleProp];
  }, [pickerHeight, itemHeight, contentContainerStyleProp]);
  return /*#__PURE__*/React.createElement(ExtendedAnimatedFlatList, _extends({
    showsHorizontalScrollIndicator: false,
    showsVerticalScrollIndicator: false,
    scrollEventThrottle: 16,
    scrollEnabled: !readOnly
  }, restProps, {
    ref: forwardedRef,
    data: data,
    renderItem: renderItem,
    keyExtractor: keyExtractor,
    getItemLayout: getItemLayout,
    initialScrollIndex: initialIndex,
    onScroll: onScroll,
    snapToOffsets: snapToOffsets,
    style: styles.list,
    contentContainerStyle: contentContainerStyle,
    onTouchStart: onTouchStart,
    onTouchEnd: onTouchEnd,
    onTouchCancel: onTouchCancel,
    onScrollEnd: onScrollEnd,
    initialNumToRender: initialNumToRender ?? Math.ceil(visibleItemCount / 2),
    maxToRenderPerBatch: maxToRenderPerBatch ?? Math.ceil(visibleItemCount / 2),
    updateCellsBatchingPeriod: updateCellsBatchingPeriod,
    windowSize: windowSize,
    nestedScrollEnabled: true,
    removeClippedSubviews: false
  }));
};
const styles = StyleSheet.create({
  list: {
    width: '100%',
    overflow: 'visible'
  }
});
export default /*#__PURE__*/memo( /*#__PURE__*/forwardRef(VirtualizedList));
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