Rename webapp_it2me to remoting_webapp and move it from webapp/me2mom to webapp/

remoting/webapp/me2mom/wcs_loader.js

-/* Copyright (c) 2012 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.
- */
-
-/**
- * @fileoverview
- * A class that loads a WCS IQ client and constructs remoting.wcs as a
- * wrapper for it.
- */
-
-'use strict';
-
-/** @suppress {duplicate} */
-var remoting = remoting || {};
-
-/** @type {remoting.WcsLoader} */
-remoting.wcsLoader = null;
-
-/**
- * @constructor
- * @private
- */
-remoting.WcsLoader = function() {
-  /**
-   * The WCS client that will be downloaded. This variable is initialized (via
-   * remoting.wcsLoader) by the downloaded Javascript.
-   * @type {remoting.WcsIqClient}
-   */
-  this.wcsIqClient = null;
-};
-
-/**
- * Load WCS if necessary, then invoke the callback with an access token.
- *
- * @param {function(string?): void} onReady The callback function, called with
- *     an OAuth2 access token when WCS has been loaded, or with null on error.
- * @return {void} Nothing.
- */
-remoting.WcsLoader.load = function(onReady) {
-  if (!remoting.wcsLoader) {
-    remoting.wcsLoader = new remoting.WcsLoader();
-  }
-  /** @param {string} token The OAuth2 access token. */
-  var start = function(token) {
-    remoting.wcsLoader.start_(token, onReady);
-  };
-  remoting.oauth2.callWithToken(start);
-};
-
-/**
- * The URL of the GTalk gadget.
- * @type {string}
- * @private
- */
-remoting.WcsLoader.prototype.TALK_GADGET_URL_ =
-    'https://talkgadget.google.com/talkgadget/';
-
-/**
- * The id of the script node.
- * @type {string}
- * @private
- */
-remoting.WcsLoader.prototype.SCRIPT_NODE_ID_ = 'wcs-script-node';
-
-/**
- * The attribute name indicating that the WCS has finished loading.
- * @type {string}
- * @private
- */
-remoting.WcsLoader.prototype.SCRIPT_NODE_LOADED_FLAG_ = 'wcs-script-loaded';
-
-/**
- * Starts loading the WCS IQ client.
- *
- * When it's loaded, construct remoting.wcs as a wrapper for it.
- * When the WCS connection is ready, or on error, call |onReady|.
- *
- * @param {string} token An OAuth2 access token.
- * @param {function(string?): void} onReady The callback function, called with
- *     an OAuth2 access token when WCS has been loaded, or with null on error.
- * @return {void} Nothing.
- * @private
- */
-remoting.WcsLoader.prototype.start_ = function(token, onReady) {
-  var node = document.getElementById(this.SCRIPT_NODE_ID_);
-  if (!node) {
-    // The first time, there will be no script node, so create one.
-    node = document.createElement('script');
-    node.id = this.SCRIPT_NODE_ID_;
-    node.src = this.TALK_GADGET_URL_ + 'iq?access_token=' + token;
-    node.type = 'text/javascript';
-    document.body.insertBefore(node, document.body.firstChild);
-  } else if (node.hasAttribute(this.SCRIPT_NODE_LOADED_FLAG_)) {
-    // Subsequently, explicitly invoke onReady if onload has already fired.
-    // TODO(jamiewalch): It's possible that the WCS client has not finished
-    // initializing. Add support for multiple callbacks to the remoting.Wcs
-    // class to address this.
-    onReady(token);
-    return;
-  }
-  /** @type {remoting.WcsLoader} */
-  var that = this;
-  var onLoad = function() {
-    var typedNode = /** @type {Element} */ (node);
-    typedNode.setAttribute(that.SCRIPT_NODE_LOADED_FLAG_, true);
-    that.constructWcs_(token, onReady);
-  };
-  var onError = function() {
-    var typedNode = /** @type {Element} */ (node);
-    typedNode.parentNode.removeChild(node);
-    onReady(null);
-  };
-  node.addEventListener('load', onLoad, false);
-  node.addEventListener('error', onError, false);
-};
-
-/**
- * Constructs the remoting.wcs object.
- *
- * @param {string} token An OAuth2 access token.
- * @param {function(string?): void} onReady The callback function, called with
- *     an OAuth2 access token when WCS has been loaded, or with null on error.
- * @return {void} Nothing.
- * @private
- */
-remoting.WcsLoader.prototype.constructWcs_ = function(token, onReady) {
-  remoting.wcs = new remoting.Wcs(
-      remoting.wcsLoader.wcsIqClient,
-      token,
-      function() { onReady(token); });
-};