<!--
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,
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<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';

  const getKeyboardEvent = function(e) {
    return Polymer.dom(e.detail ? e.detail.keyboardEvent : e);
  };

  /** @polymerBehavior KeyboardShortcutBehaviorImpl */
  const KeyboardShortcutBehaviorImpl = {
    modifierPressed(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;
    },

    isModifierPressed(e, modifier) {
      e = getKeyboardEvent(e);
      // When e is a keyboardEvent, e.event is not null.
      if (e.event) { e = e.event; }
      return e[modifier];
    },

    shouldSuppressKeyboardShortcut(e) {
      e = getKeyboardEvent(e);
      if (e.path[0].tagName === 'INPUT' || e.path[0].tagName === 'TEXTAREA') {
        return true;
      }
      for (let 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>