[polymer] import all elements

pkg/polymer/lib/elements/polymer-media-query/polymer-media-query.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-media-query can be used to data bind to a CSS media query.
+ * The "query" property is a bare CSS media query.
+ * The "queryMatches" property will be a boolean representing if the page matches that media query.
+ *
+ * polymer-media-query uses media query listeners to dynamically update the "queryMatches" property.
+ * A "polymer-mediachange" event also fires when queryMatches changes.
+ *
+ * Example:
+ *
+ *      <polymer-media-query query="max-width: 640px" queryMatches="{{phoneScreen}}"></polymer-media-query>
+ *
+ * @class polymer-media-query
+ */
+-->
+<link rel="import" href="../polymer/polymer.html">
+
+<polymer-element name="polymer-media-query" attributes="query queryMatches">
+  <template>
+    <style>
+      :host {
+        display: none;
+      }
+    </style>
+  </template>
+  <script>
+
+    Polymer('polymer-media-query', {
+      /**
+       * The Boolean return value of the media query
+       * @attribute queryMatches
+       * @type Boolean
+       * @default false
+       */
+      queryMatches: false,
+      /**
+       * The CSS media query to evaulate
+       * @attribute query
+       * @type string
+       * @default ''
+       */
+      query: '',
+      ready: function() {
+        this._mqHandler = this.queryHandler.bind(this);
+        this._mq = null;
+      },
+      queryChanged: function() {
+        if (this._mq) {
+          this._mq.removeListener(this._mqHandler);
+        }
+        var query = this.query;
+        if (query[0] !== '(') {
+          query = '(' + this.query + ')';
+        }
+        this._mq = window.matchMedia(query);
+        this._mq.addListener(this._mqHandler);
+        this.queryHandler(this._mq);
+      },
+      queryHandler: function(mq) {
+        this.queryMatches = mq.matches;
+        this.asyncFire('polymer-mediachange', mq);
+      }
+    });
+  </script>
+</polymer-element>