acud/lib/form/hooks/useFrameState.js

acg react 组件库

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _typeof = require("@babel/runtime/helpers/typeof");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = useFrameState;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var React = _interopRequireWildcard(require("react"));
var _raf = _interopRequireDefault(require("rc-util/lib/raf"));
function _interopRequireWildcard(e, t) { if ("function" == typeof WeakMap) var r = new WeakMap(), n = new WeakMap(); return (_interopRequireWildcard = function _interopRequireWildcard(e, t) { if (!t && e && e.__esModule) return e; var o, i, f = { __proto__: null, "default": e }; if (null === e || "object" != _typeof(e) && "function" != typeof e) return f; if (o = t ? n : r) { if (o.has(e)) return o.get(e); o.set(e, f); } for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]); return f; })(e, t); }
/**
 * @file updators throttled by every frame
 * @author chenqiang(chenqiang03)
 */

function useFrameState(defaultValue) {
  var _React$useState = React.useState(defaultValue),
    _React$useState2 = (0, _slicedToArray2["default"])(_React$useState, 2),
    value = _React$useState2[0],
    setValue = _React$useState2[1];
  var frameRef = React.useRef(null);
  var batchRef = React.useRef([]);
  var destoryRef = React.useRef(false);
  React.useEffect(function () {
    return function () {
      destoryRef.current = true;
      _raf["default"].cancel(frameRef.current);
    };
  }, []);
  function setFrameValue(updater) {
    if (destoryRef.current) {
      return;
    }
    if (frameRef.current === null) {
      batchRef.current = [];
      frameRef.current = (0, _raf["default"])(function () {
        frameRef.current = null;
        setValue(function (prevValue) {
          var current = prevValue;
          batchRef.current.forEach(function (func) {
            current = func(current);
          });
          return current;
        });
      });
    }
    batchRef.current.push(updater);
  }
  return [value, setFrameValue];
}