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video.dev.js
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/**
* @fileoverview Main function src.
*/
// HTML5 Shiv. Must be in <head> to support older browsers.
document.createElement('video');document.createElement('audio');
/**
* Doubles as the main function for users to create a player instance and also
* the main library object.
*
* @param {String|Element} id Video element or video element ID
* @param {Object=} options Optional options object for config/settings
* @param {Function=} ready Optional ready callback
* @return {vjs.Player} A player instance
*/
var vjs = function(id, options, ready){
var tag; // Element of ID
// Allow for element or ID to be passed in
// String ID
if (typeof id === 'string') {
// Adjust for jQuery ID syntax
if (id.indexOf('#') === 0) {
id = id.slice(1);
}
// If a player instance has already been created for this ID return it.
if (vjs.players[id]) {
return vjs.players[id];
// Otherwise get element for ID
} else {
tag = vjs.el(id);
}
// ID is a media element
} else {
tag = id;
}
// Check for a useable element
if (!tag || !tag.nodeName) { // re: nodeName, could be a box div also
throw new TypeError('The element or ID supplied is not valid. (videojs)'); // Returns
}
// Element may have a player attr referring to an already created player instance.
// If not, set up a new player and return the instance.
return tag['player'] || new vjs.Player(tag, options, ready);
};
// Extended name, also available externally, window.videojs
var videojs = vjs;
window.videojs = window.vjs = vjs;
// CDN Version. Used to target right flash swf.
vjs.CDN_VERSION = '4.0';
vjs.ACCESS_PROTOCOL = ('https:' == document.location.protocol ? 'https://' : 'http://');
/**
* Global Player instance options, surfaced from vjs.Player.prototype.options_
* vjs.options = vjs.Player.prototype.options_
* All options should use string keys so they avoid
* renaming by closure compiler
* @type {Object}
*/
vjs.options = {
// Default order of fallback technology
'techOrder': ['html5','flash'],
// techOrder: ['flash','html5'],
'html5': {},
'flash': {},
// Default of web browser is 300x150. Should rely on source width/height.
'width': 300,
'height': 150,
// defaultVolume: 0.85,
'defaultVolume': 0.00, // The freakin seaguls are driving me crazy!
// Included control sets
'children': {
'mediaLoader': {},
'controlBar': {}
}
};
// Set CDN Version of swf
// The added (+) blocks the replace from changing this 4.0 string
if (vjs.CDN_VERSION !== 'GENERATED'+'_CDN_VSN') {
videojs.options['flash']['swf'] = vjs.ACCESS_PROTOCOL + 'vjs.zencdn.net/'+vjs.CDN_VERSION+'/video-js.swf';
}
/**
* Global player list
* @type {Object}
*/
vjs.players = {};
/**
* Core Object/Class for objects that use inheritance + contstructors
* @constructor
*/
vjs.CoreObject = vjs['CoreObject'] = function(){};
// Manually exporting vjs['CoreObject'] here for Closure Compiler
// because of the use of the extend/create class methods
// If we didn't do this, those functions would get flattend to something like
// `a = ...` and `this.prototype` would refer to the global object instead of
// CoreObject
/**
* Create a new object that inherits from this Object
* @param {Object} props Functions and properties to be applied to the
* new object's prototype
* @return {vjs.CoreObject} Returns an object that inherits from CoreObject
* @this {*}
*/
vjs.CoreObject.extend = function(props){
var init, subObj;
props = props || {};
// Set up the constructor using the supplied init method
// or using the init of the parent object
// Make sure to check the unobfuscated version for external libs
init = props['init'] || props.init || this.prototype['init'] || this.prototype.init || function(){};
// In Resig's simple class inheritance (previously used) the constructor
// is a function that calls `this.init.apply(arguments)`
// However that would prevent us from using `ParentObject.call(this);`
// in a Child constuctor because the `this` in `this.init`
// would still refer to the Child and cause an inifinite loop.
// We would instead have to do
// `ParentObject.prototype.init.apply(this, argumnents);`
// Bleh. We're not creating a _super() function, so it's good to keep
// the parent constructor reference simple.
subObj = function(){
init.apply(this, arguments);
};
// Inherit from this object's prototype
subObj.prototype = vjs.obj.create(this.prototype);
// Reset the constructor property for subObj otherwise
// instances of subObj would have the constructor of the parent Object
subObj.prototype.constructor = subObj;
// Make the class extendable
subObj.extend = vjs.CoreObject.extend;
// Make a function for creating instances
subObj.create = vjs.CoreObject.create;
// Extend subObj's prototype with functions and other properties from props
for (var name in props) {
if (props.hasOwnProperty(name)) {
subObj.prototype[name] = props[name];
}
}
return subObj;
};
/**
* Create a new instace of this Object class
* @return {vjs.CoreObject} Returns an instance of a CoreObject subclass
* @this {*}
*/
vjs.CoreObject.create = function(){
// Create a new object that inherits from this object's prototype
var inst = vjs.obj.create(this.prototype);
// Apply this constructor function to the new object
this.apply(inst, arguments);
// Return the new object
return inst;
};
/**
* @fileoverview Event System (John Resig - Secrets of a JS Ninja http://jsninja.com/)
* (Original book version wasn't completely usable, so fixed some things and made Closure Compiler compatible)
* This should work very similarly to jQuery's events, however it's based off the book version which isn't as
* robust as jquery's, so there's probably some differences.
*/
/**
* Add an event listener to element
* It stores the handler function in a separate cache object
* and adds a generic handler to the element's event,
* along with a unique id (guid) to the element.
* @param {Element|Object} elem Element or object to bind listeners to
* @param {String} type Type of event to bind to.
* @param {Function} fn Event listener.
*/
vjs.on = function(elem, type, fn){
var data = vjs.getData(elem);
// We need a place to store all our handler data
if (!data.handlers) data.handlers = {};
if (!data.handlers[type]) data.handlers[type] = [];
if (!fn.guid) fn.guid = vjs.guid++;
data.handlers[type].push(fn);
if (!data.dispatcher) {
data.disabled = false;
data.dispatcher = function (event){
if (data.disabled) return;
event = vjs.fixEvent(event);
var handlers = data.handlers[event.type];
if (handlers) {
// Copy handlers so if handlers are added/removed during the process it doesn't throw everything off.
var handlersCopy = handlers.slice(0);
for (var m = 0, n = handlersCopy.length; m < n; m++) {
if (event.isImmediatePropagationStopped()) {
break;
} else {
handlersCopy[m].call(elem, event);
}
}
}
};
}
if (data.handlers[type].length == 1) {
if (document.addEventListener) {
elem.addEventListener(type, data.dispatcher, false);
} else if (document.attachEvent) {
elem.attachEvent('on' + type, data.dispatcher);
}
}
};
/**
* Removes event listeners from an element
* @param {Element|Object} elem Object to remove listeners from
* @param {String=} type Type of listener to remove. Don't include to remove all events from element.
* @param {Function} fn Specific listener to remove. Don't incldue to remove listeners for an event type.
*/
vjs.off = function(elem, type, fn) {
// Don't want to add a cache object through getData if not needed
if (!vjs.hasData(elem)) return;
var data = vjs.getData(elem);
// If no events exist, nothing to unbind
if (!data.handlers) { return; }
// Utility function
var removeType = function(t){
data.handlers[t] = [];
vjs.cleanUpEvents(elem,t);
};
// Are we removing all bound events?
if (!type) {
for (var t in data.handlers) removeType(t);
return;
}
var handlers = data.handlers[type];
// If no handlers exist, nothing to unbind
if (!handlers) return;
// If no listener was provided, remove all listeners for type
if (!fn) {
removeType(type);
return;
}
// We're only removing a single handler
if (fn.guid) {
for (var n = 0; n < handlers.length; n++) {
if (handlers[n].guid === fn.guid) {
handlers.splice(n--, 1);
}
}
}
vjs.cleanUpEvents(elem, type);
};
/**
* Clean up the listener cache and dispatchers
* @param {Element|Object} elem Element to clean up
* @param {String} type Type of event to clean up
*/
vjs.cleanUpEvents = function(elem, type) {
var data = vjs.getData(elem);
// Remove the events of a particular type if there are none left
if (data.handlers[type].length === 0) {
delete data.handlers[type];
// data.handlers[type] = null;
// Setting to null was causing an error with data.handlers
// Remove the meta-handler from the element
if (document.removeEventListener) {
elem.removeEventListener(type, data.dispatcher, false);
} else if (document.detachEvent) {
elem.detachEvent('on' + type, data.dispatcher);
}
}
// Remove the events object if there are no types left
if (vjs.isEmpty(data.handlers)) {
delete data.handlers;
delete data.dispatcher;
delete data.disabled;
// data.handlers = null;
// data.dispatcher = null;
// data.disabled = null;
}
// Finally remove the expando if there is no data left
if (vjs.isEmpty(data)) {
vjs.removeData(elem);
}
};
/**
* Fix a native event to have standard property values
* @param {Object} event Event object to fix
* @return {Object}
*/
vjs.fixEvent = function(event) {
function returnTrue() { return true; }
function returnFalse() { return false; }
// Test if fixing up is needed
// Used to check if !event.stopPropagation instead of isPropagationStopped
// But native events return true for stopPropagation, but don't have
// other expected methods like isPropagationStopped. Seems to be a problem
// with the Javascript Ninja code. So we're just overriding all events now.
if (!event || !event.isPropagationStopped) {
var old = event || window.event;
event = {};
// Clone the old object so that we can modify the values event = {};
// IE8 Doesn't like when you mess with native event properties
// Firefox returns false for event.hasOwnProperty('type') and other props
// which makes copying more difficult.
// TODO: Probably best to create a whitelist of event props
for (var key in old) {
// Safari 6.0.3 warns you if you try to copy deprecated layerX/Y
if (key !== 'layerX' && key !== 'layerY') {
event[key] = old[key];
}
}
// The event occurred on this element
if (!event.target) {
event.target = event.srcElement || document;
}
// Handle which other element the event is related to
event.relatedTarget = event.fromElement === event.target ?
event.toElement :
event.fromElement;
// Stop the default browser action
event.preventDefault = function () {
if (old.preventDefault) {
old.preventDefault();
}
event.returnValue = false;
event.isDefaultPrevented = returnTrue;
};
event.isDefaultPrevented = returnFalse;
// Stop the event from bubbling
event.stopPropagation = function () {
if (old.stopPropagation) {
old.stopPropagation();
}
event.cancelBubble = true;
event.isPropagationStopped = returnTrue;
};
event.isPropagationStopped = returnFalse;
// Stop the event from bubbling and executing other handlers
event.stopImmediatePropagation = function () {
if (old.stopImmediatePropagation) {
old.stopImmediatePropagation();
}
event.isImmediatePropagationStopped = returnTrue;
event.stopPropagation();
};
event.isImmediatePropagationStopped = returnFalse;
// Handle mouse position
if (event.clientX != null) {
var doc = document.documentElement, body = document.body;
event.pageX = event.clientX +
(doc && doc.scrollLeft || body && body.scrollLeft || 0) -
(doc && doc.clientLeft || body && body.clientLeft || 0);
event.pageY = event.clientY +
(doc && doc.scrollTop || body && body.scrollTop || 0) -
(doc && doc.clientTop || body && body.clientTop || 0);
}
// Handle key presses
event.which = event.charCode || event.keyCode;
// Fix button for mouse clicks:
// 0 == left; 1 == middle; 2 == right
if (event.button != null) {
event.button = (event.button & 1 ? 0 :
(event.button & 4 ? 1 :
(event.button & 2 ? 2 : 0)));
}
}
// Returns fixed-up instance
return event;
};
/**
* Trigger an event for an element
* @param {Element|Object} elem Element to trigger an event on
* @param {String} event Type of event to trigger
*/
vjs.trigger = function(elem, event) {
// Fetches element data and a reference to the parent (for bubbling).
// Don't want to add a data object to cache for every parent,
// so checking hasData first.
var elemData = (vjs.hasData(elem)) ? vjs.getData(elem) : {};
var parent = elem.parentNode || elem.ownerDocument;
// type = event.type || event,
// handler;
// If an event name was passed as a string, creates an event out of it
if (typeof event === 'string') {
event = { type:event, target:elem };
}
// Normalizes the event properties.
event = vjs.fixEvent(event);
// If the passed element has a dispatcher, executes the established handlers.
if (elemData.dispatcher) {
elemData.dispatcher.call(elem, event);
}
// Unless explicitly stopped, recursively calls this function to bubble the event up the DOM.
if (parent && !event.isPropagationStopped()) {
vjs.trigger(parent, event);
// If at the top of the DOM, triggers the default action unless disabled.
} else if (!parent && !event.isDefaultPrevented()) {
var targetData = vjs.getData(event.target);
// Checks if the target has a default action for this event.
if (event.target[event.type]) {
// Temporarily disables event dispatching on the target as we have already executed the handler.
targetData.disabled = true;
// Executes the default action.
if (typeof event.target[event.type] === 'function') {
event.target[event.type]();
}
// Re-enables event dispatching.
targetData.disabled = false;
}
}
// Inform the triggerer if the default was prevented by returning false
return !event.isDefaultPrevented();
/* Original version of js ninja events wasn't complete.
* We've since updated to the latest version, but keeping this around
* for now just in case.
*/
// // Added in attion to book. Book code was broke.
// event = typeof event === 'object' ?
// event[vjs.expando] ?
// event :
// new vjs.Event(type, event) :
// new vjs.Event(type);
// event.type = type;
// if (handler) {
// handler.call(elem, event);
// }
// // Clean up the event in case it is being reused
// event.result = undefined;
// event.target = elem;
};
/**
* Trigger a listener only once for an event
* @param {Element|Object} elem Element or object to
* @param {[type]} type [description]
* @param {Function} fn [description]
* @return {[type]}
*/
vjs.one = function(elem, type, fn) {
vjs.on(elem, type, function(){
vjs.off(elem, type, arguments.callee);
fn.apply(this, arguments);
});
};
var hasOwnProp = Object.prototype.hasOwnProperty;
/**
* Creates an element and applies properties.
* @param {String=} tagName Name of tag to be created.
* @param {Object=} properties Element properties to be applied.
* @return {Element}
*/
vjs.createEl = function(tagName, properties){
var el = document.createElement(tagName || 'div');
for (var propName in properties){
if (hasOwnProp.call(properties, propName)) {
//el[propName] = properties[propName];
// Not remembering why we were checking for dash
// but using setAttribute means you have to use getAttribute
// The check for dash checks for the aria-* attributes, like aria-label, aria-valuemin.
// The additional check for "role" is because the default method for adding attributes does not
// add the attribute "role". My guess is because it's not a valid attribute in some namespaces, although
// browsers handle the attribute just fine. The W3C allows for aria-* attributes to be used in pre-HTML5 docs.
// http://www.w3.org/TR/wai-aria-primer/#ariahtml. Using setAttribute gets around this problem.
if (propName.indexOf('aria-') !== -1 || propName=='role') {
el.setAttribute(propName, properties[propName]);
} else {
el[propName] = properties[propName];
}
}
}
return el;
};
/**
* Uppercase the first letter of a string
* @param {String} string String to be uppercased
* @return {String}
*/
vjs.capitalize = function(string){
return string.charAt(0).toUpperCase() + string.slice(1);
};
/**
* Object functions container
* @type {Object}
*/
vjs.obj = {};
/**
* Object.create shim for prototypal inheritance.
* https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Object/create
* @param {Object} obj Object to use as prototype
*/
vjs.obj.create = Object.create || function(obj){
//Create a new function called 'F' which is just an empty object.
function F() {}
//the prototype of the 'F' function should point to the
//parameter of the anonymous function.
F.prototype = obj;
//create a new constructor function based off of the 'F' function.
return new F();
};
/**
* Loop through each property in an object and call a function
* whose arguments are (key,value)
* @param {Object} obj Object of properties
* @param {Function} fn Function to be called on each property.
* @this {*}
*/
vjs.obj.each = function(obj, fn, context){
for (var key in obj) {
if (hasOwnProp.call(obj, key)) {
fn.call(context || this, key, obj[key]);
}
}
};
/**
* Merge two objects together and return the original.
* @param {Object} obj1
* @param {Object} obj2
* @return {Object}
*/
vjs.obj.merge = function(obj1, obj2){
if (!obj2) { return obj1; }
for (var key in obj2){
if (hasOwnProp.call(obj2, key)) {
obj1[key] = obj2[key];
}
}
return obj1;
};
/**
* Merge two objects, and merge any properties that are objects
* instead of just overwriting one. Uses to merge options hashes
* where deeper default settings are important.
* @param {Object} obj1 Object to override
* @param {Object} obj2 Overriding object
* @return {Object} New object. Obj1 and Obj2 will be untouched.
*/
vjs.obj.deepMerge = function(obj1, obj2){
var key, val1, val2, objDef;
objDef = '[object Object]';
// Make a copy of obj1 so we're not ovewriting original values.
// like prototype.options_ and all sub options objects
obj1 = vjs.obj.copy(obj1);
for (key in obj2){
if (hasOwnProp.call(obj2, key)) {
val1 = obj1[key];
val2 = obj2[key];
// Check if both properties are pure objects and do a deep merge if so
if (vjs.obj.isPlain(val1) && vjs.obj.isPlain(val2)) {
obj1[key] = vjs.obj.deepMerge(val1, val2);
} else {
obj1[key] = obj2[key];
}
}
}
return obj1;
};
/**
* Make a copy of the supplied object
* @param {Object} obj Object to copy
* @return {Object} Copy of object
*/
vjs.obj.copy = function(obj){
return vjs.obj.merge({}, obj);
};
/**
* Check if an object is plain, and not a dom node or any object sub-instance
* @param {Object} obj Object to check
* @return {Boolean} True if plain, false otherwise
*/
vjs.obj.isPlain = function(obj){
return !!obj
&& typeof obj === 'object'
&& obj.toString() === '[object Object]'
&& obj.constructor === Object;
};
/**
* Bind (a.k.a proxy or Context). A simple method for changing the context of a function
It also stores a unique id on the function so it can be easily removed from events
* @param {*} context The object to bind as scope
* @param {Function} fn The function to be bound to a scope
* @param {Number=} uid An optional unique ID for the function to be set
* @return {Function}
*/
vjs.bind = function(context, fn, uid) {
// Make sure the function has a unique ID
if (!fn.guid) { fn.guid = vjs.guid++; }
// Create the new function that changes the context
var ret = function() {
return fn.apply(context, arguments);
};
// Allow for the ability to individualize this function
// Needed in the case where multiple objects might share the same prototype
// IF both items add an event listener with the same function, then you try to remove just one
// it will remove both because they both have the same guid.
// when using this, you need to use the bind method when you remove the listener as well.
// currently used in text tracks
ret.guid = (uid) ? uid + '_' + fn.guid : fn.guid;
return ret;
};
/**
* Element Data Store. Allows for binding data to an element without putting it directly on the element.
* Ex. Event listneres are stored here.
* (also from jsninja.com, slightly modified and updated for closure compiler)
* @type {Object}
*/
vjs.cache = {};
/**
* Unique ID for an element or function
* @type {Number}
*/
vjs.guid = 1;
/**
* Unique attribute name to store an element's guid in
* @type {String}
* @constant
*/
vjs.expando = 'vdata' + (new Date()).getTime();
/**
* Returns the cache object where data for an element is stored
* @param {Element} el Element to store data for.
* @return {Object}
*/
vjs.getData = function(el){
var id = el[vjs.expando];
if (!id) {
id = el[vjs.expando] = vjs.guid++;
vjs.cache[id] = {};
}
return vjs.cache[id];
};
/**
* Returns the cache object where data for an element is stored
* @param {Element} el Element to store data for.
* @return {Object}
*/
vjs.hasData = function(el){
var id = el[vjs.expando];
return !(!id || vjs.isEmpty(vjs.cache[id]));
};
/**
* Delete data for the element from the cache and the guid attr from getElementById
* @param {Element} el Remove data for an element
*/
vjs.removeData = function(el){
var id = el[vjs.expando];
if (!id) { return; }
// Remove all stored data
// Changed to = null
// http://coding.smashingmagazine.com/2012/11/05/writing-fast-memory-efficient-javascript/
// vjs.cache[id] = null;
delete vjs.cache[id];
// Remove the expando property from the DOM node
try {
delete el[vjs.expando];
} catch(e) {
if (el.removeAttribute) {
el.removeAttribute(vjs.expando);
} else {
// IE doesn't appear to support removeAttribute on the document element
el[vjs.expando] = null;
}
}
};
vjs.isEmpty = function(obj) {
for (var prop in obj) {
// Inlude null properties as empty.
if (obj[prop] !== null) {
return false;
}
}
return true;
};
/**
* Add a CSS class name to an element
* @param {Element} element Element to add class name to
* @param {String} classToAdd Classname to add
*/
vjs.addClass = function(element, classToAdd){
if ((' '+element.className+' ').indexOf(' '+classToAdd+' ') == -1) {
element.className = element.className === '' ? classToAdd : element.className + ' ' + classToAdd;
}
};
/**
* Remove a CSS class name from an element
* @param {Element} element Element to remove from class name
* @param {String} classToAdd Classname to remove
*/
vjs.removeClass = function(element, classToRemove){
if (element.className.indexOf(classToRemove) == -1) { return; }
var classNames = element.className.split(' ');
// IE8 Does not support array.indexOf so using a for loop
for (var i = classNames.length - 1; i >= 0; i--) {
if (classNames[i] === classToRemove) {
classNames.splice(i,1);
}
}
// classNames.splice(classNames.indexOf(classToRemove),1);
element.className = classNames.join(' ');
};
/**
* Element for testing browser HTML5 video capabilities
* @type {Element}
* @constant
*/
vjs.TEST_VID = vjs.createEl('video');
/**
* Useragent for browser testing.
* @type {String}
* @constant
*/
vjs.USER_AGENT = navigator.userAgent;
/**
* Device is an iPhone
* @type {Boolean}
* @constant
*/
vjs.IS_IPHONE = !!vjs.USER_AGENT.match(/iPhone/i);
vjs.IS_IPAD = !!vjs.USER_AGENT.match(/iPad/i);
vjs.IS_IPOD = !!vjs.USER_AGENT.match(/iPod/i);
vjs.IS_IOS = vjs.IS_IPHONE || vjs.IS_IPAD || vjs.IS_IPOD;
vjs.IOS_VERSION = (function(){
var match = vjs.USER_AGENT.match(/OS (\d+)_/i);
if (match && match[1]) { return match[1]; }
})();
vjs.IS_ANDROID = !!vjs.USER_AGENT.match(/Android.*AppleWebKit/i);
vjs.ANDROID_VERSION = (function() {
var match = vjs.USER_AGENT.match(/Android (\d+)\./i);
if (match && match[1]) {
return match[1];
}
return null;
})();
vjs.IS_FIREFOX = function(){ return !!vjs.USER_AGENT.match('Firefox'); };
/**
* Get an element's attribute values, as defined on the HTML tag
* Attributs are not the same as properties. They're defined on the tag
* or with setAttribute (which shouldn't be used with HTML)
* This will return true or false for boolean attributes.
* @param {Element} tag Element from which to get tag attributes
* @return {Object}
*/
vjs.getAttributeValues = function(tag){
var obj = {};
// Known boolean attributes
// We can check for matching boolean properties, but older browsers
// won't know about HTML5 boolean attributes that we still read from.
// Bookending with commas to allow for an easy string search.
var knownBooleans = ','+'autoplay,controls,loop,muted,default'+',';
if (tag && tag.attributes && tag.attributes.length > 0) {
var attrs = tag.attributes;
var attrName, attrVal;
for (var i = attrs.length - 1; i >= 0; i--) {
attrName = attrs[i].name;
attrVal = attrs[i].value;
// Check for known booleans
// The matching element property will return a value for typeof
if (typeof tag[attrName] === 'boolean' || knownBooleans.indexOf(','+attrName+',') !== -1) {
// The value of an included boolean attribute is typically an empty string ('')
// which would equal false if we just check for a false value.
// We also don't want support bad code like autoplay='false'
attrVal = (attrVal !== null) ? true : false;
}
obj[attrName] = attrVal;
}
}
return obj;
};
/**
* Get the computed style value for an element
* From http://robertnyman.com/2006/04/24/get-the-rendered-style-of-an-element/
* @param {Element} el Element to get style value for
* @param {String} strCssRule Style name
* @return {String} Style value
*/
vjs.getComputedDimension = function(el, strCssRule){
var strValue = '';
if(document.defaultView && document.defaultView.getComputedStyle){
strValue = document.defaultView.getComputedStyle(el, '').getPropertyValue(strCssRule);
} else if(el.currentStyle){
// IE8 Width/Height support
strValue = el['client'+strCssRule.substr(0,1).toUpperCase() + strCssRule.substr(1)] + 'px';
}
return strValue;
};
/**
* Insert an element as the first child node of another
* @param {Element} child Element to insert
* @param {[type]} parent Element to insert child into
*/
vjs.insertFirst = function(child, parent){
if (parent.firstChild) {
parent.insertBefore(child, parent.firstChild);
} else {
parent.appendChild(child);
}
};
/**
* Object to hold browser support information
* @type {Object}
*/
vjs.support = {};
/**
* Shorthand for document.getElementById()
* Also allows for CSS (jQuery) ID syntax. But nothing other than IDs.
* @param {String} id Element ID
* @return {Element} Element with supplied ID
*/
vjs.el = function(id){
if (id.indexOf('#') === 0) {
id = id.slice(1);
}
return document.getElementById(id);
};
/**
* Format seconds as a time string, H:MM:SS or M:SS
* Supplying a guide (in seconds) will force a number of leading zeros
* to cover the length of the guide
* @param {Number} seconds Number of seconds to be turned into a string
* @param {Number} guide Number (in seconds) to model the string after
* @return {String} Time formatted as H:MM:SS or M:SS
*/
vjs.formatTime = function(seconds, guide) {
guide = guide || seconds; // Default to using seconds as guide
var s = Math.floor(seconds % 60),
m = Math.floor(seconds / 60 % 60),
h = Math.floor(seconds / 3600),
gm = Math.floor(guide / 60 % 60),
gh = Math.floor(guide / 3600);
// Check if we need to show hours
h = (h > 0 || gh > 0) ? h + ':' : '';
// If hours are showing, we may need to add a leading zero.
// Always show at least one digit of minutes.
m = (((h || gm >= 10) && m < 10) ? '0' + m : m) + ':';
// Check if leading zero is need for seconds
s = (s < 10) ? '0' + s : s;
return h + m + s;
};
// Attempt to block the ability to select text while dragging controls
vjs.blockTextSelection = function(){
document.body.focus();
document.onselectstart = function () { return false; };
};
// Turn off text selection blocking
vjs.unblockTextSelection = function(){ document.onselectstart = function () { return true; }; };
/**
* Trim whitespace from the ends of a string.
* @param {String} string String to trim
* @return {String} Trimmed string
*/
vjs.trim = function(string){
return string.toString().replace(/^\s+/, '').replace(/\s+$/, '');
};
/**
* Should round off a number to a decimal place
* @param {Number} num Number to round
* @param {Number} dec Number of decimal places to round to
* @return {Number} Rounded number
*/
vjs.round = function(num, dec) {
if (!dec) { dec = 0; }
return Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
};
/**
* Should create a fake TimeRange object
* Mimics an HTML5 time range instance, which has functions that
* return the start and end times for a range
* TimeRanges are returned by the buffered() method
* @param {Number} start Start time in seconds
* @param {Number} end End time in seconds
* @return {Object} Fake TimeRange object
*/
vjs.createTimeRange = function(start, end){
return {
length: 1,