Fix improper implementation of getKeyboardEvent

Bug: Issue 5088
Change-Id: Iee82c135230f78f823c25982aaeba1ea6ece1709

polygerrit-ui/app/behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.html

@@ -0,0 +1,54 @@
+<!--
+Copyright (C) 2016 The Android Open Source Project
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+<link rel="import" href="../../bower_components/polymer/polymer.html">
+<link rel="import" href="../../bower_components/iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
+
+<script>
+(function(window) {
+  'use strict';
+
+  var getKeyboardEvent = function(e) {
+    return Polymer.dom(e.detail ? e.detail.keyboardEvent : e);
+  };
+
+  var KeyboardShortcutBehaviorImpl = {
+    modifierPressed: function(e) {
+      e = getKeyboardEvent(e);
+      // When e is a keyboardEvent, e.event is not null.
+      if (e.event) { e = e.event; }
+      return e.altKey || e.ctrlKey || e.metaKey || e.shiftKey;
+    },
+
+    shouldSuppressKeyboardShortcut: function(e) {
+      e = getKeyboardEvent(e);
+      if (e.path[0].tagName === 'INPUT' || e.path[0].tagName === 'TEXTAREA') {
+        return true;
+      }
+      for (var i = 0; i < e.path.length; i++) {
+        if (e.path[i].tagName === 'GR-OVERLAY') { return true; }
+      }
+      return false;
+    },
+  };
+
+  window.Gerrit = window.Gerrit || {};
+  /** @polymerBehavior Gerrit.KeyboardShortcutBehavior */
+  window.Gerrit.KeyboardShortcutBehavior = [
+    Polymer.IronA11yKeysBehavior,
+    KeyboardShortcutBehaviorImpl,
+  ];
+})(window);
+</script>