react-native-sortables/dist/module/providers/shared/AutoScrollProvider/utils.js

Powerful Sortable Components for Flexible Content Reordering in React Native

"use strict";

import { Extrapolation, interpolate } from 'react-native-reanimated';
export const calculateRawProgress = (position, containerPos, scrollableSize, activationOffset, contentBounds, maxOverscroll, extrapolation) => {
  'worklet';

  const startDistance = containerPos + contentBounds[0];
  const startBoundProgress = interpolate(startDistance, [-activationOffset[0], maxOverscroll[0]], [1, 0], Extrapolation.CLAMP);
  const contentSize = contentBounds[1] - contentBounds[0];
  const endDistance = scrollableSize - contentSize - startDistance;
  const endBoundProgress = interpolate(endDistance, [-activationOffset[1], maxOverscroll[1]], [1, 0], Extrapolation.CLAMP);
  const startBound = -containerPos;
  const startThreshold = startBound + activationOffset[0];
  const endBound = startBound + scrollableSize;
  const endThreshold = endBound - activationOffset[1];
  return interpolate(position, [startBound, startThreshold, endThreshold, endBound], [-startBoundProgress, 0, 0, endBoundProgress], extrapolation);
};
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