polygerrit-ui/app/elements/edit/gr-edit-file-controls/gr-edit-file-controls.js

/**
 * @license
 * Copyright (C) 2017 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 GrEditFileControls extends Polymer.GestureEventListeners(
      Polymer.LegacyElementMixin(
          Polymer.Element)) {
    static get is() { return 'gr-edit-file-controls'; }
    /**
     * Fired when an action in the overflow menu is tapped.
     *
     * @event file-action-tap
     */

    static get properties() {
      return {
        filePath: String,
        _allFileActions: {
          type: Array,
          value: () => Object.values(GrEditConstants.Actions),
        },
        _fileActions: {
          type: Array,
          computed: '_computeFileActions(_allFileActions)',
        },
      };
    }

    _handleActionTap(e) {
      e.preventDefault();
      e.stopPropagation();
      this._dispatchFileAction(e.detail.id, this.filePath);
    }

    _dispatchFileAction(action, path) {
      this.dispatchEvent(new CustomEvent(
          'file-action-tap',
          {detail: {action, path}, bubbles: true, composed: true}));
    }

    _computeFileActions(actions) {
      // TODO(kaspern): conditionally disable some actions based on file status.
      return actions.map(action => {
        return {
          name: action.label,
          id: action.id,
        };
      });
    }
  }

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