"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ScrollShadow = void 0;
var _react = _interopRequireWildcard(require("react"));
var _classnames = _interopRequireDefault(require("classnames"));
var _Styles = require("./Styles");
var _excluded = ["children", "className", "disableVertical", "disableHorizontal", "invertHorizontal", "invertVertical", "innerColor", "outerColor"];
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
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); }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }
var ScrollShadow = exports.ScrollShadow = /*#__PURE__*/(0, _react.forwardRef)(function (_ref, ref) {
  var children = _ref.children,
    className = _ref.className,
    _ref$disableVertical = _ref.disableVertical,
    disableVertical = _ref$disableVertical === void 0 ? false : _ref$disableVertical,
    _ref$disableHorizonta = _ref.disableHorizontal,
    disableHorizontal = _ref$disableHorizonta === void 0 ? false : _ref$disableHorizonta,
    _ref$invertHorizontal = _ref.invertHorizontal,
    invertHorizontal = _ref$invertHorizontal === void 0 ? false : _ref$invertHorizontal,
    _ref$invertVertical = _ref.invertVertical,
    invertVertical = _ref$invertVertical === void 0 ? false : _ref$invertVertical,
    innerColor = _ref.innerColor,
    outerColor = _ref.outerColor,
    rest = _objectWithoutProperties(_ref, _excluded);
  var _useState = (0, _react.useState)({
      top: 0,
      right: 0,
      bottom: 0,
      left: 0
    }),
    _useState2 = _slicedToArray(_useState, 2),
    opacity = _useState2[0],
    setOpacity = _useState2[1];
  var handleScroll = (0, _react.useCallback)(function (event) {
    var _ref2 = event.target,
      scrollHeight = _ref2.scrollHeight,
      clientHeight = _ref2.clientHeight,
      scrollWidth = _ref2.scrollWidth,
      clientWidth = _ref2.clientWidth;
    var _ref3 = event.target,
      scrollTop = _ref3.scrollTop,
      scrollLeft = _ref3.scrollLeft;
    if (scrollLeft < 0) {
      scrollLeft *= -1;
    }
    if (scrollTop < 0) {
      scrollTop *= -1;
    }
    setOpacity(function (prevState) {
      var top = 1 / 20 * Math.min(scrollTop, 20);
      var bottomScrollTop = scrollHeight - clientHeight;
      var bottom = 1 / 20 * (bottomScrollTop - Math.max(scrollTop, bottomScrollTop - 20));
      var left = 1 / 20 * Math.min(scrollLeft, 20);
      var offset = scrollWidth - clientWidth;
      var right = 1 / 20 * (offset - Math.max(scrollLeft, offset - 20));
      var newState = {
        top: 0,
        bottom: 0,
        left: 0,
        right: 0
      };
      if (!disableVertical) {
        newState.top = invertVertical ? bottom : top;
        newState.bottom = invertVertical ? top : bottom;
      }
      if (!disableHorizontal) {
        newState.left = invertHorizontal ? right : left;
        newState.right = invertHorizontal ? left : right;
      }
      if (newState.top !== prevState.top || newState.bottom !== prevState.bottom || newState.left !== prevState.left || newState.right !== prevState.right) {
        return newState;
      }
      return prevState;
    });
  }, [invertHorizontal, invertVertical, disableVertical, disableHorizontal]);
  return /*#__PURE__*/_react.default.createElement(_Styles.StyledScrollShadow, _extends({}, rest, {
    ref: ref,
    className: (0, _classnames.default)("c-scroll-shadow", className)
  }), children({
    onScroll: handleScroll
  }), !disableVertical ? /*#__PURE__*/_react.default.createElement(_react.default.Fragment, null, /*#__PURE__*/_react.default.createElement(_Styles.StyledScrollShadowTop, {
    $innerColor: innerColor,
    $outerColor: outerColor,
    style: {
      opacity: opacity.top
    }
  }), /*#__PURE__*/_react.default.createElement(_Styles.StyledScrollShadowBottom, {
    $innerColor: innerColor,
    $outerColor: outerColor,
    style: {
      opacity: opacity.bottom
    }
  })) : null, !disableHorizontal ? /*#__PURE__*/_react.default.createElement(_react.default.Fragment, null, /*#__PURE__*/_react.default.createElement(_Styles.StyledScrollShadowLeft, {
    $innerColor: innerColor,
    $outerColor: outerColor,
    style: {
      opacity: opacity.left
    }
  }), /*#__PURE__*/_react.default.createElement(_Styles.StyledScrollShadowRight, {
    $innerColor: innerColor,
    $outerColor: outerColor,
    style: {
      opacity: opacity.right
    }
  })) : null);
});
ScrollShadow.displayName = "ScrollShadow";
//# sourceMappingURL=ScrollShadow.js.map