remoting/webapp/base/js/connection_dropped_dialog.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /** @suppress {duplicate} */
   6 var remoting = remoting || {};
   7
   8 (function() {
   9
  10 'use strict';
  11
  12 /**
  13  * A Dialog that is shown to the user when the connection is dropped.
  14  *
  15  * @constructor
  16  * @param {HTMLElement} rootElement
  17  * @param {remoting.WindowShape=} opt_windowShape
  18  * @implements {base.Disposable}
  19  */
  20 remoting.ConnectionDroppedDialog = function(rootElement, opt_windowShape) {
  21   /** @private */
  22   this.dialog_ = new remoting.Html5ModalDialog({
  23     dialog: /** @type {HTMLDialogElement} */ (rootElement),
  24     primaryButton: rootElement.querySelector('.restart-button'),
  25     secondaryButton: rootElement.querySelector('.close-button'),
  26     closeOnEscape: false,
  27     windowShape: opt_windowShape
  28   });
  29
  30   /** @private */
  31   this.disposables_ = new base.Disposables(this.dialog_);
  32 };
  33
  34 remoting.ConnectionDroppedDialog.prototype.dispose = function() {
  35   base.dispose(this.disposables_);
  36   this.disposables_ = null;
  37 };
  38
  39 /**
  40  * @return {Promise}  Promise that resolves if
  41  *     the user chooses to reconnect, or rejects if the user chooses to cancel.
  42  *     This class doesn't re-establish the connection.  The caller must
  43  *     implement the reconnect logic.
  44  */
  45 remoting.ConnectionDroppedDialog.prototype.show = function() {
  46   var promise = this.dialog_.show();
  47   this.waitForOnline_().then(
  48     this.dialog_.close.bind(this.dialog_, remoting.MessageDialog.Result.PRIMARY)
  49   );
  50   return promise.then(function(/** remoting.MessageDialog.Result */ result) {
  51     if (result === remoting.MessageDialog.Result.PRIMARY) {
  52       return Promise.resolve();
  53     } else {
  54       return Promise.reject(new remoting.Error(remoting.Error.Tag.CANCELLED));
  55     }
  56   });
  57 };
  58
  59 /**
  60  * @private
  61  * @return {Promise}
  62  */
  63 remoting.ConnectionDroppedDialog.prototype.waitForOnline_ = function() {
  64   if (base.isOnline()) {
  65     return Promise.resolve();
  66   }
  67
  68   var deferred = new base.Deferred();
  69   this.disposables_.add(new base.DomEventHook(
  70       window, 'online', deferred.resolve.bind(deferred), false));
  71   return deferred.promise();
  72 };
  73
  74 })();