[Webapp Refactor] Reliably cancels a connection.

remoting/webapp/crd/js/desktop_remoting_activity.js

 // Copyright 2015 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.
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 (function() {
 
 'use strict';
@@ skipping 12 matching lines @@
   /** @private */
   this.parentActivity_ = parentActivity;
   /** @private {remoting.DesktopConnectedView} */
   this.connectedView_ = null;
   /** @private */
   this.sessionFactory_ = new remoting.ClientSessionFactory(
       document.querySelector('#client-container .client-plugin-container'),
       remoting.app_capabilities());
   /** @private {remoting.ClientSession} */
   this.session_ = null;
+  /** @private {remoting.ConnectingDialog} */
+  this.connectingDialog_ =
+      new remoting.ConnectingDialog(parentActivity.stop.bind(parentActivity));
 };
 
 /**
  * Initiates a connection.
  *
  * @param {remoting.Host} host the Host to connect to.
  * @param {remoting.CredentialsProvider} credentialsProvider
  * @param {boolean=} opt_suppressOfflineError
  * @return {void} Nothing.
  */
 remoting.DesktopRemotingActivity.prototype.start =
     function(host, credentialsProvider, opt_suppressOfflineError) {
   var that = this;
   this.sessionFactory_.createSession(this).then(
     function(/** remoting.ClientSession */ session) {
       that.session_ = session;
       session.logHostOfflineErrors(!opt_suppressOfflineError);
       session.connect(host, credentialsProvider);
-  });
+  }).catch(remoting.Error.handler(
+    function(/** !remoting.Error */ error) {
+      that.parentActivity_.onConnectionFailed(error);
+  }));
 };
 
 remoting.DesktopRemotingActivity.prototype.stop = function() {
   if (this.session_) {
     this.session_.disconnect(remoting.Error.none());
     console.log('Disconnected.');
   }
 };
 
 /**
  * @param {remoting.ConnectionInfo} connectionInfo
  */
 remoting.DesktopRemotingActivity.prototype.onConnected =
     function(connectionInfo) {
+  this.connectingDialog_.hide();
   remoting.setMode(remoting.AppMode.IN_SESSION);
   if (!base.isAppsV2()) {
     remoting.toolbar.center();
     remoting.toolbar.preview();
   }
 
   this.connectedView_ = new remoting.DesktopConnectedView(
       document.getElementById('client-container'), connectionInfo);
 
   // By default, under ChromeOS, remap the right Control key to the right
@@ skipping 42 matching lines @@
     return true;
   }
   return false;
 };
 
 remoting.DesktopRemotingActivity.prototype.dispose = function() {
   base.dispose(this.connectedView_);
   this.connectedView_ = null;
   base.dispose(this.session_);
   this.session_ = null;
+  this.connectingDialog_.hide();
 };
 
 /** @return {remoting.DesktopConnectedView} */
 remoting.DesktopRemotingActivity.prototype.getConnectedView = function() {
   return this.connectedView_;
 };
 
 /**
  * @return {remoting.ClientSession}.
  */
 remoting.DesktopRemotingActivity.prototype.getSession = function() {
   return this.session_;
 };
 
+/** @return {remoting.ConnectingDialog} */
+remoting.DesktopRemotingActivity.prototype.getConnectingDialog = function() {
+  return this.connectingDialog_;
+};
+
 })();