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// Copyright 2008 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview A simple callback mechanism for notification about module
* loads. Should be considered package-private to goog.module.
*
*/
goog.provide('goog.module.ModuleLoadCallback');
goog.require('goog.debug.entryPointRegistry');
/** @suppress {extraRequire} */
goog.require('goog.module');
/**
* Class used to encapsulate the callbacks to be called when a module loads.
* @param {Function} fn Callback function.
* @param {Object=} opt_handler Optional handler under whose scope to execute
* the callback.
* @constructor
* @final
*/
goog.module.ModuleLoadCallback = function(fn, opt_handler) {
/**
* Callback function.
* @type {Function}
* @private
*/
this.fn_ = fn;
/**
* Optional handler under whose scope to execute the callback.
* @type {Object|undefined}
* @private
*/
this.handler_ = opt_handler;
};
/**
* Completes the operation and calls the callback function if appropriate.
* @param {*} context The module context.
*/
goog.module.ModuleLoadCallback.prototype.execute = function(context) {
if (this.fn_) {
this.fn_.call(this.handler_ || null, context);
this.handler_ = null;
this.fn_ = null;
}
};
/**
* Abort the callback, but not the actual module load.
*/
goog.module.ModuleLoadCallback.prototype.abort = function() {
this.fn_ = null;
this.handler_ = null;
};
// Register the browser event handler as an entry point, so that
// it can be monitored for exception handling, etc.
goog.debug.entryPointRegistry.register(
/**
* @param {function(!Function): !Function} transformer The transforming
* function.
*/
function(transformer) {
goog.module.ModuleLoadCallback.prototype.execute =
transformer(goog.module.ModuleLoadCallback.prototype.execute);
});
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