InternshipProject/node_modules/rc-virtual-list/lib/hooks/useHeights.js

"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = useHeights;

var React = _interopRequireWildcard(require("react"));

var _findDOMNode = _interopRequireDefault(require("rc-util/lib/Dom/findDOMNode"));

var _CacheMap = _interopRequireDefault(require("../utils/CacheMap"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

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(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

function useHeights(getKey, onItemAdd, onItemRemove) {
  var _React$useState = React.useState(0),
      _React$useState2 = _slicedToArray(_React$useState, 2),
      updatedMark = _React$useState2[0],
      setUpdatedMark = _React$useState2[1];

  var instanceRef = (0, React.useRef)(new Map());
  var heightsRef = (0, React.useRef)(new _CacheMap.default());
  var heightUpdateIdRef = (0, React.useRef)(0);

  function collectHeight() {
    heightUpdateIdRef.current += 1;
    var currentId = heightUpdateIdRef.current;
    Promise.resolve().then(function () {
      // Only collect when it's latest call
      if (currentId !== heightUpdateIdRef.current) return;
      instanceRef.current.forEach(function (element, key) {
        if (element && element.offsetParent) {
          var htmlElement = (0, _findDOMNode.default)(element);
          var offsetHeight = htmlElement.offsetHeight;

          if (heightsRef.current.get(key) !== offsetHeight) {
            heightsRef.current.set(key, htmlElement.offsetHeight);
          }
        }
      }); // Always trigger update mark to tell parent that should re-calculate heights when resized

      setUpdatedMark(function (c) {
        return c + 1;
      });
    });
  }

  function setInstanceRef(item, instance) {
    var key = getKey(item);
    var origin = instanceRef.current.get(key);

    if (instance) {
      instanceRef.current.set(key, instance);
      collectHeight();
    } else {
      instanceRef.current.delete(key);
    } // Instance changed


    if (!origin !== !instance) {
      if (instance) {
        onItemAdd === null || onItemAdd === void 0 ? void 0 : onItemAdd(item);
      } else {
        onItemRemove === null || onItemRemove === void 0 ? void 0 : onItemRemove(item);
      }
    }
  }

  return [setInstanceRef, collectHeight, heightsRef.current, updatedMark];
}