curvature/animate/Ease.js


"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.Ease = void 0;
var _Mixin = require("../base/Mixin");
var _PromiseMixin = require("../mixin/PromiseMixin");
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); Object.defineProperty(subClass, "prototype", { writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
var Ease = /*#__PURE__*/function (_Mixin$with) {
  _inherits(Ease, _Mixin$with);
  var _super = _createSuper(Ease);
  function Ease(interval) {
    var _this;
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    _classCallCheck(this, Ease);
    _this = _super.call(this);
    _this.interval = interval;
    _this.terminal = false;
    _this.initial = false;
    _this.timeout = false;
    _this["final"] = false;
    _this.canceled = false;
    _this.done = false;
    _this.calculate = _this.calculate || 'calculate' in options ? options.calculate : false;
    _this.bounded = 'bounded' in options ? options.bounded : true;
    _this.repeat = 'repeat' in options ? options.repeat : 1;
    _this.reverse = 'reverse' in options ? options.reverse : false;
    return _this;
  }
  _createClass(Ease, [{
    key: "start",
    value: function start() {
      var _this2 = this;
      this.done = false;
      requestAnimationFrame(function () {
        _this2.initial = Date.now();
        _this2.terminal = _this2.initial + _this2.interval;
        if (_this2.repeat >= 0) {
          _this2.terminal = _this2.initial + _this2.interval * _this2.repeat;
          _this2.timeout = setTimeout(function () {
            if (_this2.done) {
              return _this2.reverse ? 0 : 1;
            }
            _this2.done = true;
            _this2[_PromiseMixin.PromiseMixin.Accept](_this2.reverse ? 0 : 1);
          }, _this2.interval * _this2.repeat);
        }
      });
    }
  }, {
    key: "cancel",
    value: function cancel() {
      if (this.done) {
        return this["final"];
      }
      clearTimeout(this.timeout);
      this["final"] = this.current();
      this.canceled = this.done = true;
      this[_PromiseMixin.PromiseMixin.Reject](this["final"]);
      return this["final"];
    }
  }, {
    key: "fraction",
    value: function fraction() {
      if (this.done) {
        return this.reverse ? 0 : 1;
      }
      if (this.initial === false) {
        return this.reverse ? 1 : 0;
      }
      var elapsed = Date.now() - this.initial;
      if (elapsed / this.interval >= this.repeat) {
        return this.reverse ? 0 : 1;
      }
      var fraction = elapsed % this.interval / this.interval;
      return this.reverse ? 1 - fraction : fraction;
    }
  }, {
    key: "current",
    value: function current() {
      var t = this.fraction();
      if (this.calculate) {
        return this.calculate(t);
      }
      return t;
    }
  }]);
  return Ease;
}(_Mixin.Mixin["with"](_PromiseMixin.PromiseMixin));
exports.Ease = Ease;