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// 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 collection of utility methods for UberPage and its contained
* pages.
*/
cr.define('uber', function() {
/**
* Invokes a method on the parent window (UberPage). This is a convenience
* method for API calls into the uber page.
* @param {String} method The name of the method to invoke.
* @param {Object=} opt_params Optional property bag of parameters to pass to
* the invoked method.
* @private
*/
function invokeMethodOnParent(method, opt_params) {
if (window.location == window.parent.location)
return;
invokeMethodOnWindow(window.parent, method, opt_params, 'chrome://chrome');
}
/**
* Invokes a method on the target window.
* @param {String} method The name of the method to invoke.
* @param {Object=} opt_params Optional property bag of parameters to pass to
* the invoked method.
* @param {String=} opt_url The origin of the target window.
* @private
*/
function invokeMethodOnWindow(targetWindow, method, opt_params, opt_url) {
var data = {method: method, params: opt_params};
targetWindow.postMessage(data, opt_url ? opt_url : '*');
}
return {
invokeMethodOnParent: invokeMethodOnParent,
invokeMethodOnWindow: invokeMethodOnWindow,
};
});
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