choerodon-ui/lib/_util/throttleByAnimationFrame.js

An enterprise-class UI design language and React-based implementation

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault")["default"];

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

var _toConsumableArray2 = _interopRequireDefault(require("@babel/runtime/helpers/toConsumableArray"));

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

function throttleByAnimationFrame(fn) {
  var requestId;

  var later = function later(args) {
    return function () {
      requestId = null;
      fn.apply(void 0, (0, _toConsumableArray2["default"])(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() {
  return function (target, key, descriptor) {
    var fn = descriptor.value;
    var definingProperty = false;
    return {
      configurable: true,
      get: function get() {
        if (definingProperty || this === target.prototype || {}.hasOwnProperty.call(this, 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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