/**
 * @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, []);
        }
    }
};