/*
 * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 */

(function(scope) {

/**
 * @class polymer-base
 */

 /**
  * Resolve a url path to be relative to a `base` url. If unspecified, `base`
  * defaults to the element's ownerDocument url. Can be used to resolve
  * paths from element's in templates loaded in HTMLImports to be relative
  * to the document containing the element. Polymer automatically does this for
  * url attributes in element templates; however, if a url, for
  * example, contains a binding, then `resolvePath` can be used to ensure it is 
  * relative to the element document. For example, in an element's template,
  *
  *     <a href="{{resolvePath(path)}}">Resolved</a>
  * 
  * @method resolvePath
  * @param {String} url Url path to resolve.
  * @param {String} base Optional base url against which to resolve, defaults
  * to the element's ownerDocument url.
  * returns {String} resolved url.
  */

var path = {
  resolveElementPaths: function(node) {
    Polymer.urlResolver.resolveDom(node);
  },
  addResolvePathApi: function() {
    // let assetpath attribute modify the resolve path
    var assetPath = this.getAttribute('assetpath') || '';
    var root = new URL(assetPath, this.ownerDocument.baseURI);
    this.prototype.resolvePath = function(urlPath, base) {
      var u = new URL(urlPath, base || root);
      return u.href;
    };
  }
};

// exports
scope.api.declaration.path = path;

})(Polymer);