fullpage-scroll-component/dist/lib/StepScroll/hooks/useSuccessiveValue.js

Stepped Scroll Component Library.

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var react = require('react');

const useSuccessiveValue = ({
  defaultNumber = 0,
  maximum
}) => {
  const defaultCurrentNumberRef = react.useRef(defaultNumber !== null && defaultNumber !== void 0 ? defaultNumber : 0);
  const [current, setCurrent] = react.useState(defaultCurrentNumberRef.current);
  const resetCurrent = react.useCallback(() => {
    setCurrent(defaultCurrentNumberRef.current);
  }, []);
  const next = react.useCallback(() => {
    if (current >= maximum) {
      return current;
    }
    setCurrent(prev => ++prev);
    return current + 1;
  }, [current, maximum]);
  const prev = react.useCallback(() => {
    if (current <= 0) {
      return current;
    }
    setCurrent(prev => --prev);
    return current - 1;
  }, [current]);
  const hasNext = react.useMemo(() => {
    return current < maximum;
  }, [current, maximum]);
  const hasPrev = react.useMemo(() => {
    return current > 0;
  }, [current]);
  const move = react.useCallback(to => {
    if (to >= 0 || to <= maximum) {
      setCurrent(to);
    }
  }, [maximum]);
  return {
    current,
    setCurrent,
    resetCurrent,
    next,
    prev,
    hasNext,
    hasPrev,
    move
  };
};

exports.useSuccessiveValue = useSuccessiveValue;