| // Copyright 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. |
| |
| goog.provide('__crWeb.webUIModuleLoadNotifier'); |
| |
| /** |
| * A holder class for require.js contexts whose load is pending. |
| * @constructor |
| */ |
| var WebUIModuleLoadNotifier = function() { |
| this.lastUsedId_ = 0; |
| this.pendingContexts_ = new Map(); |
| }; |
| |
| /** |
| * Adds the given context to the list of pending contexts. |
| * @param {string} name Name of the module that will be loaded. |
| * @param {!Object} context Require.js context to hold. |
| * @return {string} Identifier for the added context, can be later used for |
| * {@code moduleLoadCompleted} and {@code moduleLoadFailed} arguments. |
| */ |
| WebUIModuleLoadNotifier.prototype.addPendingContext = function(name, context) { |
| this.lastUsedId_++; |
| var key = name + this.lastUsedId_; |
| this.pendingContexts_.set(key, context); |
| return String(this.lastUsedId_); |
| }; |
| |
| /** |
| * Signals that module has successfully loaded. |
| * @param {string} name Name of the module that has been loaded. |
| * @param {String} loadId Identifier returned from {@code addPendingContext}. |
| */ |
| WebUIModuleLoadNotifier.prototype.moduleLoadCompleted = function(name, loadId) { |
| this.popContext_(name, loadId).completeLoad(name); |
| }; |
| |
| /** |
| * Signals that module has failed to load. |
| * @param {string} name Name of the module that has failed to load. |
| * @param {String} loadId Identifier returned from {@code addPendingContext}. |
| */ |
| WebUIModuleLoadNotifier.prototype.moduleLoadFailed = function(name, loadId) { |
| this.popContext_(name, loadId).onScriptFailure(name); |
| }; |
| |
| /** |
| * Pops the pending context. |
| * @param {string} name Name of the module that has failed to load. |
| * @param {String} loadId Identifier returned from {@code addPendingContext}. |
| * @return {Object} Require.js context |
| */ |
| WebUIModuleLoadNotifier.prototype.popContext_ = function(name, loadId) { |
| var key = name + loadId; |
| var context = this.pendingContexts_.get(key); |
| this.pendingContexts_.delete(key); |
| return context; |
| }; |