polygerrit-ui/app/elements/core/gr-key-binding-display/gr-key-binding-display.js

/**
 * @license
 * Copyright (C) 2018 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.
 */
(function() {
  'use strict';

  /** @extends Polymer.Element */
  class GrKeyBindingDisplay extends Polymer.GestureEventListeners(
      Polymer.LegacyElementMixin(
          Polymer.Element)) {
    static get is() { return 'gr-key-binding-display'; }

    static get properties() {
      return {
      /** @type {Array<string>} */
        binding: Array,
      };
    }

    _computeModifiers(binding) {
      return binding.slice(0, binding.length - 1);
    }

    _computeKey(binding) {
      return binding[binding.length - 1];
    }
  }

  customElements.define(GrKeyBindingDisplay.is, GrKeyBindingDisplay);
})();