tools_auto_web/node_modules/rc-virtual-list/lib/hooks/useOriginScroll.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _react = require("react");
var _default = exports.default = function _default(isScrollAtTop, isScrollAtBottom, isScrollAtLeft, isScrollAtRight) {
  // Do lock for a wheel when scrolling
  var lockRef = (0, _react.useRef)(false);
  var lockTimeoutRef = (0, _react.useRef)(null);
  function lockScroll() {
    clearTimeout(lockTimeoutRef.current);
    lockRef.current = true;
    lockTimeoutRef.current = setTimeout(function () {
      lockRef.current = false;
    }, 50);
  }

  // Pass to ref since global add is in closure
  var scrollPingRef = (0, _react.useRef)({
    top: isScrollAtTop,
    bottom: isScrollAtBottom,
    left: isScrollAtLeft,
    right: isScrollAtRight
  });
  scrollPingRef.current.top = isScrollAtTop;
  scrollPingRef.current.bottom = isScrollAtBottom;
  scrollPingRef.current.left = isScrollAtLeft;
  scrollPingRef.current.right = isScrollAtRight;
  return function (isHorizontal, delta) {
    var smoothOffset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
    var originScroll = isHorizontal ?
    // Pass origin wheel when on the left
    delta < 0 && scrollPingRef.current.left ||
    // Pass origin wheel when on the right
    delta > 0 && scrollPingRef.current.right // Pass origin wheel when on the top
    : delta < 0 && scrollPingRef.current.top ||
    // Pass origin wheel when on the bottom
    delta > 0 && scrollPingRef.current.bottom;
    if (smoothOffset && originScroll) {
      // No need lock anymore when it's smooth offset from touchMove interval
      clearTimeout(lockTimeoutRef.current);
      lockRef.current = false;
    } else if (!originScroll || lockRef.current) {
      lockScroll();
    }
    return !lockRef.current && originScroll;
  };
};