player/js/utils/helpers/dynamicProperties.js

function DynamicPropertyContainer() {};
DynamicPropertyContainer.prototype = {
  addDynamicProperty: function (prop) {
    if(this.dynamicProperties.indexOf(prop) === -1) {
      this.dynamicProperties.push(prop);
      this.container.addDynamicProperty(this);
      this._isAnimated = true;
    }
  },
  iterateDynamicProperties: function () {
    this._mdf = false;
    var i, len = this.dynamicProperties.length;
    for(i=0;i<len;i+=1) {
      this.dynamicProperties[i].getValue();
      if(this.dynamicProperties[i]._mdf) {
        this._mdf = true;
      }
    }
  },
  initDynamicPropertyContainer: function (container) {
    this.container = container;
    this.dynamicProperties = [];
    this._mdf = false;
    this._isAnimated = false;
  }
}