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+<!--
+@license
+Copyright (c) 2015 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
+-->
+
+<link rel="import" href="../../polymer/polymer.html">
+<link rel="import" href="../../paper-styles/color.html">
+<link rel="import" href="../iron-a11y-keys-behavior.html">
+
+<dom-module id="x-key-aware">
+  <template>
+    <style>
+      :host {
+        display: block;
+        position: relative;
+      }
+
+      pre {
+        color: var(--google-blue-700);
+      }
+
+      .keys {
+        line-height: 25px;
+      }
+
+      .keys span {
+        cursor: default;
+        background-color: var(--google-grey-100);
+        border: 1px solid var(--google-grey-300);
+        padding: 1px 5px;
+        border-radius: 5px;
+      }
+    </style>
+
+    <h4>Press any of these keys</h4>
+    <input type="checkbox" checked="{{preventDefault::change}}"> prevent default = {{preventDefault}}
+    <p class="keys">
+      <template is="dom-repeat" items="[[boundKeys]]">
+        <span>{{item}}</span>
+      </template>
+    </p>
+    <pre>[[pressed]]</pre>
+  </template>
+</dom-module>
+
+<script>
+  Polymer({
+    is: 'x-key-aware',
+
+    behaviors: [
+      Polymer.IronA11yKeysBehavior
+    ],
+
+    properties: {
+      pressed: {
+        type: String,
+        readOnly: true,
+        value: ''
+      },
+
+      boundKeys: {
+        type: Array,
+        value: function() {
+          return Object.keys(this.keyBindings).join(' ').split(' ');
+        }
+      },
+
+      preventDefault: {
+        type: Boolean,
+        value: true,
+        notify: true
+      },
+
+      keyEventTarget: {
+        type: Object,
+        value: function() {
+          return document.body;
+        }
+      }
+    },
+
+    keyBindings: {
+      '* pageup pagedown left right down up home end space enter @ ~ " $ ? ! \\ + : # backspace': '_updatePressed',
+      'a': '_updatePressed',
+      'shift+a alt+a': '_updatePressed',
+      'shift+tab shift+space': '_updatePressed'
+    },
+
+    _updatePressed: function(event) {
+      console.log(event.detail);
+
+      if (this.preventDefault) {
+        event.preventDefault();
+      }
+      this._setPressed(
+        this.pressed + event.detail.combo + ' pressed!\n'
+      );
+    }
+  });
+</script>