antd/lib/_util/throttleByAnimationFrame.js

An enterprise-class UI design language and React components implementation

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = throttleByAnimationFrame;
exports.throttleByAnimationFrameDecorator = throttleByAnimationFrameDecorator;

var _raf = _interopRequireDefault(require("raf"));

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

function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); }

function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance"); }

function _iterableToArray(iter) { if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === "[object Arguments]") return Array.from(iter); }

function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } }

function throttleByAnimationFrame(fn) {
  var requestId;

  var later = function later(args) {
    return function () {
      requestId = null;
      fn.apply(void 0, _toConsumableArray(args));
    };
  };

  var throttled = function throttled() {
    if (requestId == null) {
      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
        args[_key] = arguments[_key];
      }

      requestId = (0, _raf["default"])(later(args));
    }
  };

  throttled.cancel = function () {
    return _raf["default"].cancel(requestId);
  };

  return throttled;
}

function throttleByAnimationFrameDecorator() {
  // eslint-disable-next-line func-names
  return function (target, key, descriptor) {
    var fn = descriptor.value;
    var definingProperty = false;
    return {
      configurable: true,
      get: function get() {
        // eslint-disable-next-line no-prototype-builtins
        if (definingProperty || this === target.prototype || this.hasOwnProperty(key)) {
          return fn;
        }

        var boundFn = throttleByAnimationFrame(fn.bind(this));
        definingProperty = true;
        Object.defineProperty(this, key, {
          value: boundFn,
          configurable: true,
          writable: true
        });
        definingProperty = false;
        return boundFn;
      }
    };
  };
}
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