https://lethcounty.ca/Scripts/froogaloop.min.js

1// Init style shamelessly stolen from jQuery http://jquery.com
2var Froogaloop = (function () {
3    // Define a local copy of Froogaloop
4    function Froogaloop(iframe) {
5        // The Froogaloop object is actually just the init constructor
6        return new Froogaloop.fn.init(iframe);
7    }
8
9    var eventCallbacks = {},
10        hasWindowEvent = false,
11        isReady = false,
12        slice = Array.prototype.slice,
13        playerDomain = '';
14
15    Froogaloop.fn = Froogaloop.prototype = {
16        element: null,
17
18        init: function (iframe) {
19            if (typeof iframe === "string") {
20                iframe = document.getElementById(iframe);
21            }
22
23            this.element = iframe;
24
25            // Register message event listeners
26            playerDomain = getDomainFromUrl(this.element.getAttribute('src'));
27
28            return this;
29        },
30
31        /*
32         * Calls a function to act upon the player.
33         *
34         * @param {string} method The name of the Javascript API method to call. Eg: 'play'.
35         * @param {Array|Function} valueOrCallback params Array of parameters to pass when calling an API method
36         *                                or callback function when the method returns a value.
37         */
38        api: function (method, valueOrCallback) {
39            if (!this.element || !method) {
40                return false;
41            }
42
43            var self = this,
44                element = self.element,
45                target_id = element.id !== '' ? element.id : null,
46                params = !isFunction(valueOrCallback) ? valueOrCallback : null,
47                callback = isFunction(valueOrCallback) ? valueOrCallback : null;
48
49            // Store the callback for get functions
50            if (callback) {
51                storeCallback(method, callback, target_id);
52            }
53
54            postMessage(method, params, element);
55            return self;
56        },
57
58        /*
59         * Registers an event listener and a callback function that gets called when the event fires.
60         *
61         * @param eventName (String): Name of the event to listen for.
62         * @param callback (Function): Function that should be called when the event fires.
63         */
64        addEvent: function (eventName, callback) {
65            if (!this.element) {
66                return false;
67            }
68
69            var self = this,
70                element = self.element,
71                target_id = element.id !== '' ? element.id : null;
72
73
74            storeCallback(eventName, callback, target_id);
75
76            // The ready event is not registered via postMessage. It fires regardless.
77            if (eventName != 'ready') {
78                postMessage('addEventListener', eventName, element);
79            }
80            else if (eventName == 'ready' && isReady) {
81                callback.call(null, target_id);
82            }
83
84            return self;
85        },
86
87        /*
88         * Unregisters an event listener that gets called when the event fires.
89         *
90         * @param eventName (String): Name of the event to stop listening for.
91         */
92        removeEvent: function (eventName) {
93            if (!this.element) {
94                return false;
95            }
96
97            var self = this,
98                element = self.element,
99                target_id = element.id !== '' ? element.id : null,
100                removed = removeCallback(eventName, target_id);
101
102            // The ready event is not registered
103            if (eventName != 'ready' && removed) {
104                postMessage('removeEventListener', eventName, element);
105            }
106        }
107    };
108
109    /**
110     * Handles posting a message to the parent window.
111     *
112     * @param method (String): name of the method to call inside the player. For api calls
113     * this is the name of the api method (api_play or api_pause) while for events this method
114     * is api_addEventListener.
115     * @param params (Object or Array): List of parameters to submit to the method. Can be either
116     * a single param or an array list of parameters.
117     * @param target (HTMLElement): Target iframe to post the message to.
118     */
119    function postMessage(method, params, target) {
120        if (!target.contentWindow.postMessage) {
121            return false;
122        }
123
124        var url = target.getAttribute('src').split('?')[0],
125            data = JSON.stringify({
126                method: method,
127                value: params
128            });
129
130        if (url.substr(0, 2) === '//') {
131            url = window.location.protocol + url;
132        }
133
134        target.contentWindow.postMessage(data, url);
135    }
136
137    /**
138     * Event that fires whenever the window receives a message from its parent
139     * via window.postMessage.
140     */
141    function onMessageReceived(event) {
142        var data, method;
143
144        try {
145            data = JSON.parse(event.data);
146            method = data.event || data.method;
147        }
148        catch (e) {
149            //fail silently... like a ninja!
150        }
151
152        if (method == 'ready' && !isReady) {
153            isReady = true;
154        }
155
156        // Handles messages from moogaloop only
157        if (event.origin != playerDomain) {
158            return false;
159        }
160
161        var value = data.value,
162            eventData = data.data,
163            target_id = target_id === '' ? null : data.player_id,
164
165            callback = getCallback(method, target_id),
166            params = [];
167
168        if (!callback) {
169            return false;
170        }
171
172        if (value !== undefined) {
173            params.push(value);
174        }
175
176        if (eventData) {
177            params.push(eventData);
178        }
179
180        if (target_id) {
181            params.push(target_id);
182        }
183
184        return params.length > 0 ? callback.apply(null, params) : callback.call();
185    }
186
187
188    /**
189     * Stores submitted callbacks for each iframe being tracked and each
190     * event for that iframe.
191     *
192     * @param eventName (String): Name of the event. Eg. api_onPlay
193     * @param callback (Function): Function that should get executed when the
194     * event is fired.
195     * @param target_id (String) [Optional]: If handling more than one iframe then
196     * it stores the different callbacks for different iframes based on the iframe's
197     * id.
198     */
199    function storeCallback(eventName, callback, target_id) {
200        if (target_id) {
201            if (!eventCallbacks[target_id]) {
202                eventCallbacks[target_id] = {};
203            }
204            eventCallbacks[target_id][eventName] = callback;
205        }
206        else {
207            eventCallbacks[eventName] = callback;
208        }
209    }
210
211    /**
212     * Retrieves stored callbacks.
213     */
214    function getCallback(eventName, target_id) {
215        if (target_id) {
216            return eventCallbacks[target_id][eventName];
217        }
218        else {
219            return eventCallbacks[eventName];
220        }
221    }
222
223    function removeCallback(eventName, target_id) {
224        if (target_id && eventCallbacks[target_id]) {
225            if (!eventCallbacks[target_id][eventName]) {
226                return false;
227            }
228            eventCallbacks[target_id][eventName] = null;
229        }
230        else {
231            if (!eventCallbacks[eventName]) {
232                return false;
233            }
234            eventCallbacks[eventName] = null;
235        }
236
237        return true;
238    }
239
240    /**
241     * Returns a domain's root domain.
242     * Eg. returns http://vimeo.com when http://vimeo.com/channels is sbumitted
243     *
244     * @param url (String): Url to test against.
245     * @return url (String): Root domain of submitted url
246     */
247    function getDomainFromUrl(url) {
248        if (url.substr(0, 2) === '//') {
249            url = window.location.protocol + url;
250        }
251
252        var url_pieces = url.split('/'),
253            domain_str = '';
254
255        for (var i = 0, length = url_pieces.length; i < length; i++) {
256            if (i < 3) { domain_str += url_pieces[i]; }
257            else { break; }
258            if (i < 2) { domain_str += '/'; }
259        }
260
261        return domain_str;
262    }
263
264    function isFunction(obj) {
265        return !!(obj && obj.constructor && obj.call && obj.apply);
266    }
267
268    function isArray(obj) {
269        return toString.call(obj) === '[object Array]';
270    }
271
272    // Give the init function the Froogaloop prototype for later instantiation
273    Froogaloop.fn.init.prototype = Froogaloop.fn;
274
275    // Listens for the message event.
276    // W3C
277    if (window.addEventListener) {
278        window.addEventListener('message', onMessageReceived, false);
279    }
280    // IE
281    else {
282        window.attachEvent('onmessage', onMessageReceived);
283    }
284
285    // Expose froogaloop to the global object
286    return (window.Froogaloop = window.$f = Froogaloop);
287
288})();