[polymer] import all elements

pkg/polymer/lib/elements/polymer-jsonp/polymer-jsonp.html

+<!--
+Copyright 2013 The Polymer Authors. All rights reserved.
+Use of this source code is governed by a BSD-style
+license that can be found in the LICENSE file.
+-->
+<!--
+/**
+ * @module Polymer Elements
+ */
+/**
+ * polymer-jsonp can be used to perform JSONP requests.
+ 
+ * Example:
+ *
+ *     <polymer-jsonp url="https://clients1.google.com/finance/info?q=GOOG&client=ig&callback="
+ *         response="{{data}}"></polymer-jsonp>
+ *
+ * @class polymer-jsonp
+ */
+/**
+ * Fired when a response is received.
+ *
+ * @event polymer-response
+ */
+-->
+<link rel="import" href="../polymer/polymer.html">
+
+<polymer-element name="polymer-jsonp" attributes="url response auto bustCache">
+  <script>
+    (function() {
+      Polymer('polymer-jsonp', {
+        /**
+         * The URL target of the request.
+         * 
+         * @attribute url
+         * @type string
+         * @default ''
+         */
+        url: '',
+        /**
+         * Returns the response object.
+         *
+         * @attribute response
+         * @type Object
+         * @default null
+         */
+        response: null,
+        bustCache: false,
+        auto: false,
+        urlChanged: function() {
+          if (this.url && this.auto) {
+            this.go();
+          }
+        },
+        /**
+         * Performs a JSONP request to the url specified.
+         *
+         * @method go
+         */
+        go: function() {
+          if (!this.isInFlight()) {
+            this.callbackFunc = JSONP_CALLBACK_FUNC_NAME + callbackId++;
+            window[this.callbackFunc] = this.respond.bind(this);
+            var url = this.url + this.callbackFunc + (this.bustCache ? '&' + Math.random() : '');
+            this.addScript(url);
+          }
+        },
+        isInFlight: function() {
+          return !!this.script;
+        },
+        addScript: function(inSrc) {
+          this.script = document.createElement('script');
+          this.script.src = inSrc;
+          this.script.onerror = this.respond.bind(this);
+          var s = document.getElementsByTagName('script')[0];
+          s.parentNode.insertBefore(this.script, s);
+        },
+        removeScript: function() {
+          if (this.script.parentNode) {
+            this.script.parentNode.removeChild(this.script);
+          }
+          this.script = null;
+        },
+        respond: function(inResponse) {
+          this.response = inResponse;
+          this.removeScript();
+          delete window[this.callbackFunc];
+          this.fire('polymer-response', {response: inResponse});
+        }
+      });
+      var JSONP_CALLBACK_FUNC_NAME = '_polymer_jsonp_callback_';
+      var callbackId = 0;
+    })();
+  </script>
+</polymer-element>