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// Init style shamelessly stolen from jQuery http://jquery.com
var Froogaloop = (function(){
// Define a local copy of Froogaloop
function Froogaloop(iframe) {
// The Froogaloop object is actually just the init constructor
return new Froogaloop.fn.init(iframe);
}
var eventCallbacks = {},
hasWindowEvent = false,
isReady = false,
slice = Array.prototype.slice,
playerDomain = '';
Froogaloop.fn = Froogaloop.prototype = {
element: null,
init: function(iframe) {
if (typeof iframe === "string") {
iframe = document.getElementById(iframe);
}
this.element = iframe;
// Register message event listeners
playerDomain = getDomainFromUrl(this.element.getAttribute('src'));
return this;
},
/*
* Calls a function to act upon the player.
*
* @param {string} method The name of the Javascript API method to call. Eg: 'play'.
* @param {Array|Function} valueOrCallback params Array of parameters to pass when calling an API method
* or callback function when the method returns a value.
*/
api: function(method, valueOrCallback) {
if (!this.element || !method) {
return false;
}
var self = this,
element = self.element,
target_id = element.id !== '' ? element.id : null,
params = !isFunction(valueOrCallback) ? valueOrCallback : null,
callback = isFunction(valueOrCallback) ? valueOrCallback : null;
// Store the callback for get functions
if (callback) {
storeCallback(method, callback, target_id);
}
postMessage(method, params, element);
return self;
},
/*
* Registers an event listener and a callback function that gets called when the event fires.
*
* @param eventName (String): Name of the event to listen for.
* @param callback (Function): Function that should be called when the event fires.
*/
addEvent: function(eventName, callback) {
if (!this.element) {
return false;
}
var self = this,
element = self.element,
target_id = element.id !== '' ? element.id : null;
storeCallback(eventName, callback, target_id);
// The ready event is not registered via postMessage. It fires regardless.
if (eventName != 'ready') {
postMessage('addEventListener', eventName, element);
}
else if (eventName == 'ready' && isReady) {
callback.call(null, target_id);
}
return self;
},
/*
* Unregisters an event listener that gets called when the event fires.
*
* @param eventName (String): Name of the event to stop listening for.
*/
removeEvent: function(eventName) {
if (!this.element) {
return false;
}
var self = this,
element = self.element,
target_id = element.id !== '' ? element.id : null,
removed = removeCallback(eventName, target_id);
// The ready event is not registered
if (eventName != 'ready' && removed) {
postMessage('removeEventListener', eventName, element);
}
}
};
/**
* Handles posting a message to the parent window.
*
* @param method (String): name of the method to call inside the player. For api calls
* this is the name of the api method (api_play or api_pause) while for events this method
* is api_addEventListener.
* @param params (Object or Array): List of parameters to submit to the method. Can be either
* a single param or an array list of parameters.
* @param target (HTMLElement): Target iframe to post the message to.
*/
function postMessage(method, params, target) {
if (!target.contentWindow.postMessage) {
return false;
}
var url = target.getAttribute('src').split('?')[0],
data = JSON.stringify({
method: method,
value: params
});
if (url.substr(0, 2) === '//') {
url = window.location.protocol + url;
}
target.contentWindow.postMessage(data, url);
}
/**
* Event that fires whenever the window receives a message from its parent
* via window.postMessage.
*/
function onMessageReceived(event) {
var data, method;
try {
data = JSON.parse(event.data);
method = data.event || data.method;
}
catch(e) {
//fail silently... like a ninja!
}
if (method == 'ready' && !isReady) {
isReady = true;
}
// Handles messages from moogaloop only
if (event.origin != playerDomain) {
return false;
}
var value = data.value,
eventData = data.data,
target_id = target_id === '' ? null : data.player_id,
callback = getCallback(method, target_id),
params = [];
if (!callback) {
return false;
}
if (value !== undefined) {
params.push(value);
}
if (eventData) {
params.push(eventData);
}
if (target_id) {
params.push(target_id);
}
return params.length > 0 ? callback.apply(null, params) : callback.call();
}
/**
* Stores submitted callbacks for each iframe being tracked and each
* event for that iframe.
*
* @param eventName (String): Name of the event. Eg. api_onPlay
* @param callback (Function): Function that should get executed when the
* event is fired.
* @param target_id (String) [Optional]: If handling more than one iframe then
* it stores the different callbacks for different iframes based on the iframe's
* id.
*/
function storeCallback(eventName, callback, target_id) {
if (target_id) {
if (!eventCallbacks[target_id]) {
eventCallbacks[target_id] = {};
}
eventCallbacks[target_id][eventName] = callback;
}
else {
eventCallbacks[eventName] = callback;
}
}
/**
* Retrieves stored callbacks.
*/
function getCallback(eventName, target_id) {
if (target_id) {
return eventCallbacks[target_id][eventName];
}
else {
return eventCallbacks[eventName];
}
}
function removeCallback(eventName, target_id) {
if (target_id && eventCallbacks[target_id]) {
if (!eventCallbacks[target_id][eventName]) {
return false;
}
eventCallbacks[target_id][eventName] = null;
}
else {
if (!eventCallbacks[eventName]) {
return false;
}
eventCallbacks[eventName] = null;
}
return true;
}
/**
* Returns a domain's root domain.
* Eg. returns http://vimeo.com when http://vimeo.com/channels is sbumitted
*
* @param url (String): Url to test against.
* @return url (String): Root domain of submitted url
*/
function getDomainFromUrl(url) {
if (url.substr(0, 2) === '//') {
url = window.location.protocol + url;
}
var url_pieces = url.split('/'),
domain_str = '';
for(var i = 0, length = url_pieces.length; i < length; i++) {
if(i<3) {domain_str += url_pieces[i];}
else {break;}
if(i<2) {domain_str += '/';}
}
return domain_str;
}
function isFunction(obj) {
return !!(obj && obj.constructor && obj.call && obj.apply);
}
function isArray(obj) {
return toString.call(obj) === '[object Array]';
}
// Give the init function the Froogaloop prototype for later instantiation
Froogaloop.fn.init.prototype = Froogaloop.fn;
// Listens for the message event.
// W3C
if (window.addEventListener) {
window.addEventListener('message', onMessageReceived, false);
}
// IE
else {
window.attachEvent('onmessage', onMessageReceived);
}
// Expose froogaloop to the global object
return (window.Froogaloop = window.$f = Froogaloop);
})();