/**
 * @file 
 * Handles AE's layer parenting property.
 *
 */

function HierarchyElement() {}

HierarchyElement.prototype = {
  /**
     * @function 
     * Initializes hierarchy properties
     *
     */
  initHierarchy: function () {
    // element's parent list
    this.hierarchy = [];
    // if element is parent of another layer _isParent will be true
    this._isParent = false;
    this.checkParenting();
  },
  /**
     * @function 
     * Sets layer's hierarchy.
     * @param {array} hierarch
     * layer's parent list
     *
     */ 
  setHierarchy: function (hierarchy) {
    this.hierarchy = hierarchy;
  },
  /**
     * @function 
     * Sets layer as parent.
     *
     */ 
  setAsParent: function () {
    this._isParent = true;
  },
  /**
     * @function 
     * Searches layer's parenting chain
     *
     */ 
  checkParenting: function () {
    if (this.data.parent !== undefined) {
      this.comp.buildElementParenting(this, this.data.parent, []);
    }
  },
};