File: Audits2Panel.js

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// Copyright (c) 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
 * @unrestricted
 */
Audits2.Audits2Panel = class extends UI.Panel {
  constructor() {
    super('audits2');
    this.contentElement.classList.add('vbox');
    this.contentElement.appendChild(UI.createTextButton(Common.UIString('Start'), this._start.bind(this)));
    this.contentElement.appendChild(UI.createTextButton(Common.UIString('Stop'), this._stop.bind(this)));
    this._resultElement = this.contentElement.createChild('div', 'overflow-auto');
  }

  _start() {
    SDK.targetManager.interceptMainConnection(this._dispatchProtocolMessage.bind(this)).then(rawConnection => {
      this._rawConnection = rawConnection;
      this._send('start').then(result => {
        var section = new Components.ObjectPropertiesSection(
            SDK.RemoteObject.fromLocalObject(result), Common.UIString('Audit Results'));
        this._resultElement.appendChild(section.element);
        this._stop();
      });
    });
  }

  /**
   * @param {string} message
   */
  _dispatchProtocolMessage(message) {
    this._send('dispatchProtocolMessage', {message: message});
  }

  _stop() {
    this._send('stop').then(() => {
      this._rawConnection.disconnect();
      this._backend.dispose();
      delete this._backend;
      delete this._backendPromise;
    });
  }

  /**
   * @param {string} method
   * @param {!Object=} params
   * @return {!Promise<!Object|undefined>}
   */
  _send(method, params) {
    if (!this._backendPromise) {
      this._backendPromise =
          Services.serviceManager.createAppService('audits2_worker', 'Audits2Service', false).then(backend => {
            this._backend = backend;
            this._backend.on('sendProtocolMessage', result => this._rawConnection.sendMessage(result.message));
          });
    }
    return this._backendPromise.then(() => this._backend ? this._backend.send(method, params) : undefined);
  }
};