/**
 * @fileoverview Main function src.
 */

// HTML5 Shiv. Must be in <head> to support older browsers.
document.createElement('video');
document.createElement('audio');
document.createElement('track');

/**
 * Doubles as the main function for users to create a player instance and also
 * the main library object.
 *
 * **ALIASES** videojs, _V_ (deprecated)
 *
 * The `vjs` function can be used to initialize or retrieve a player.
 *
 *     var myPlayer = vjs('my_video_id');
 *
 * @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
 * @namespace
 */
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]) {

      // If options or ready funtion are passed, warn
      if (options) {
        vjs.log.warn ('Player "' + id + '" is already initialised. Options will not be applied.');
      }

      if (ready) {
        vjs.players[id].ready(ready);
      }

      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 = window['videojs'] = vjs;

// CDN Version. Used to target right flash swf.
vjs.CDN_VERSION = '4.12';
vjs.ACCESS_PROTOCOL = ('https:' == document.location.protocol ? 'https://' : 'http://');

/**
* Full player version
* @type {string}
*/
vjs['VERSION'] = '4.12.3';

/**
 * 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!

  // default playback rates
  'playbackRates': [],
  // Add playback rate selection by adding rates
  // 'playbackRates': [0.5, 1, 1.5, 2],

  // default inactivity timeout
  'inactivityTimeout': 2000,

  // Included control sets
  'children': {
    'mediaLoader': {},
    'posterImage': {},
    'loadingSpinner': {},
    'textTrackDisplay': {},
    'bigPlayButton': {},
    'controlBar': {},
    'errorDisplay': {},
    'textTrackSettings': {}
  },

  'language': document.getElementsByTagName('html')[0].getAttribute('lang') || navigator.languages && navigator.languages[0] || navigator.userLanguage || navigator.language || 'en',

  // locales and their language translations
  'languages': {},

  // Default message to show when a video cannot be played.
  'notSupportedMessage': 'No compatible source was found for this video.'
};

// Set CDN Version of swf
// The added (+) blocks the replace from changing this 4.12 string
if (vjs.CDN_VERSION !== 'GENERATED'+'_CDN_VSN') {
  videojs.options['flash']['swf'] = vjs.ACCESS_PROTOCOL + 'vjs.zencdn.net/'+vjs.CDN_VERSION+'/video-js.swf';
}

/**
 * Utility function for adding languages to the default options. Useful for
 * amending multiple language support at runtime.
 *
 * Example: vjs.addLanguage('es', {'Hello':'Hola'});
 *
 * @param  {String} code The language code or dictionary property
 * @param  {Object} data The data values to be translated
 * @return {Object} The resulting global languages dictionary object
 */
vjs.addLanguage = function(code, data){
  if(vjs.options['languages'][code] !== undefined) {
    vjs.options['languages'][code] = vjs.util.mergeOptions(vjs.options['languages'][code], data);
  } else {
    vjs.options['languages'][code] = data;
  }
  return vjs.options['languages'];
};

/**
 * Global player list
 * @type {Object}
 */
vjs.players = {};

/*!
 * Custom Universal Module Definition (UMD)
 *
 * Video.js will never be a non-browser lib so we can simplify UMD a bunch and
 * still support requirejs and browserify. This also needs to be closure
 * compiler compatible, so string keys are used.
 */
if (typeof define === 'function' && define['amd']) {
  define('videojs', [], function(){ return videojs; });

// checking that module is an object too because of umdjs/umd#35
} else if (typeof exports === 'object' && typeof module === 'object') {
  module['exports'] = videojs;
}
/**
 * Core Object/Class for objects that use inheritance + constructors
 *
 * To create a class that can be subclassed itself, extend the CoreObject class.
 *
 *     var Animal = CoreObject.extend();
 *     var Horse = Animal.extend();
 *
 * The constructor can be defined through the init property of an object argument.
 *
 *     var Animal = CoreObject.extend({
 *       init: function(name, sound){
 *         this.name = name;
 *       }
 *     });
 *
 * Other methods and properties can be added the same way, or directly to the
 * prototype.
 *
 *    var Animal = CoreObject.extend({
 *       init: function(name){
 *         this.name = name;
 *       },
 *       getName: function(){
 *         return this.name;
 *       },
 *       sound: '...'
 *    });
 *
 *    Animal.prototype.makeSound = function(){
 *      alert(this.sound);
 *    };
 *
 * To create an instance of a class, use the create method.
 *
 *    var fluffy = Animal.create('Fluffy');
 *    fluffy.getName(); // -> Fluffy
 *
 * Methods and properties can be overridden in subclasses.
 *
 *     var Horse = Animal.extend({
 *       sound: 'Neighhhhh!'
 *     });
 *
 *     var horsey = Horse.create('Horsey');
 *     horsey.getName(); // -> Horsey
 *     horsey.makeSound(); // -> Alert: Neighhhhh!
 *
 * @class
 * @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 flattened 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
 *
 *     var Animal = CoreObject.extend();
 *     var Horse = Animal.extend();
 *
 * @param {Object} props Functions and properties to be applied to the
 *                       new object's prototype
 * @return {vjs.CoreObject} 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 constructor because the `this` in `this.init`
  //  would still refer to the Child and cause an infinite loop.
  // We would instead have to do
  //    `ParentObject.prototype.init.apply(this, arguments);`
  //  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 instance of this Object class
 *
 *     var myAnimal = Animal.create();
 *
 * @return {vjs.CoreObject} 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|Array}   type Type of event to bind to.
 * @param  {Function} fn   Event listener.
 * @private
 */
vjs.on = function(elem, type, fn){
  if (vjs.obj.isArray(type)) {
    return _handleMultipleEvents(vjs.on, 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 (elem.addEventListener) {
      elem.addEventListener(type, data.dispatcher, false);
    } else if (elem.attachEvent) {
      elem.attachEvent('on' + type, data.dispatcher);
    }
  }
};

/**
 * Removes event listeners from an element
 * @param  {Element|Object}   elem Object to remove listeners from
 * @param  {String|Array=}   type Type of listener to remove. Don't include to remove all events from element.
 * @param  {Function} fn   Specific listener to remove. Don't include to remove listeners for an event type.
 * @private
 */
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; }

  if (vjs.obj.isArray(type)) {
    return _handleMultipleEvents(vjs.off, elem, type, fn);
  }

  // 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
 * @private
 */
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 (elem.removeEventListener) {
      elem.removeEventListener(type, data.dispatcher, false);
    } else if (elem.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}
 * @private
 */
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
      // Chrome warns you if you try to copy deprecated keyboardEvent.keyLocation
      if (key !== 'layerX' && key !== 'layerY' && key !== 'keyLocation') {
        // Chrome 32+ warns if you try to copy deprecated returnValue, but
        // we still want to if preventDefault isn't supported (IE8).
        if (!(key == 'returnValue' && old.preventDefault)) {
          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.defaultPrevented = true;
    };

    event.isDefaultPrevented = returnFalse;
    event.defaultPrevented = false;

    // 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  {Event|Object|String} event A string (the type) or an event object with a type attribute
 * @private
 */
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 or the event does not bubble (e.g. media events)
    // recursively calls this function to bubble the event up the DOM.
    if (parent && !event.isPropagationStopped() && event.bubbles !== false) {
    vjs.trigger(parent, event);

  // If at the top of the DOM, triggers the default action unless disabled.
  } else if (!parent && !event.defaultPrevented) {
    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.defaultPrevented;
  /* 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 addition 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  {String|Array}   type
 * @param  {Function} fn
 * @private
 */
vjs.one = function(elem, type, fn) {
  if (vjs.obj.isArray(type)) {
    return _handleMultipleEvents(vjs.one, elem, type, fn);
  }
  var func = function(){
    vjs.off(elem, type, func);
    fn.apply(this, arguments);
  };
  // copy the guid to the new function so it can removed using the original function's ID
  func.guid = fn.guid = fn.guid || vjs.guid++;
  vjs.on(elem, type, func);
};

/**
 * Loops through an array of event types and calls the requested method for each type.
 * @param  {Function} fn   The event method we want to use.
 * @param  {Element|Object} elem Element or object to bind listeners to
 * @param  {String}   type Type of event to bind to.
 * @param  {Function} callback   Event listener.
 * @private
 */
function _handleMultipleEvents(fn, elem, type, callback) {
  vjs.arr.forEach(type, function(type) {
    fn(elem, type, callback); //Call the event method for each one of the types
  });
}
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}
 * @private
 */
vjs.createEl = function(tagName, properties){
  var el;

  tagName = tagName || 'div';
  properties = properties || {};

  el = document.createElement(tagName);

  vjs.obj.each(properties, function(propName, val){
    // 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, val);
    } else {
     el[propName] = val;
    }
  });

  return el;
};

/**
 * Uppercase the first letter of a string
 * @param  {String} string String to be uppercased
 * @return {String}
 * @private
 */
vjs.capitalize = function(string){
  return string.charAt(0).toUpperCase() + string.slice(1);
};

/**
 * Object functions container
 * @type {Object}
 * @private
 */
vjs.obj = {};

/**
 * Object.create shim for prototypal inheritance
 *
 * https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Object/create
 *
 * @function
 * @param  {Object}   obj Object to use as prototype
 * @private
 */
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 {*}
 * @private
 */
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}
 * @private
 */
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.
 * @private
 */
vjs.obj.deepMerge = function(obj1, obj2){
  var key, val1, val2;

  // make a copy of obj1 so we're not overwriting 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
 * @private
 */
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
 * @private
 */
vjs.obj.isPlain = function(obj){
  return !!obj
    && typeof obj === 'object'
    && obj.toString() === '[object Object]'
    && obj.constructor === Object;
};

/**
 * Check if an object is Array
*  Since instanceof Array will not work on arrays created in another frame we need to use Array.isArray, but since IE8 does not support Array.isArray we need this shim
 * @param  {Object} obj Object to check
 * @return {Boolean}     True if plain, false otherwise
 * @private
 */
vjs.obj.isArray = Array.isArray || function(arr) {
  return Object.prototype.toString.call(arr) === '[object Array]';
};

/**
 * Check to see whether the input is NaN or not.
 * NaN is the only JavaScript construct that isn't equal to itself
 * @param {Number} num Number to check
 * @return {Boolean} True if NaN, false otherwise
 * @private
 */
vjs.isNaN = function(num) {
  return num !== num;
};

/**
 * 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}
 * @private
 */
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 listeners are stored here.
 * (also from jsninja.com, slightly modified and updated for closure compiler)
 * @type {Object}
 * @private
 */
vjs.cache = {};

/**
 * Unique ID for an element or function
 * @type {Number}
 * @private
 */
vjs.guid = 1;

/**
 * Unique attribute name to store an element's guid in
 * @type {String}
 * @constant
 * @private
 */
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}
 * @private
 */
vjs.getData = function(el){
  var id = el[vjs.expando];
  if (!id) {
    id = el[vjs.expando] = vjs.guid++;
  }
  if (!vjs.cache[id]) {
    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}
 * @private
 */
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
 * @private
 */
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;
    }
  }
};

/**
 * Check if an object is empty
 * @param  {Object}  obj The object to check for emptiness
 * @return {Boolean}
 * @private
 */
vjs.isEmpty = function(obj) {
  for (var prop in obj) {
    // Inlude null properties as empty.
    if (obj[prop] !== null) {
      return false;
    }
  }
  return true;
};

/**
 * Check if an element has a CSS class
 * @param {Element} element Element to check
 * @param {String} classToCheck Classname to check
 * @private
 */
vjs.hasClass = function(element, classToCheck){
  return ((' ' + element.className + ' ').indexOf(' ' + classToCheck + ' ') !== -1);
};


/**
 * Add a CSS class name to an element
 * @param {Element} element    Element to add class name to
 * @param {String} classToAdd Classname to add
 * @private
 */
vjs.addClass = function(element, classToAdd){
  if (!vjs.hasClass(element, classToAdd)) {
    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
 * @private
 */
vjs.removeClass = function(element, classToRemove){
  var classNames, i;

  if (!vjs.hasClass(element, classToRemove)) {return;}

  classNames = element.className.split(' ');

  // no arr.indexOf in ie8, and we don't want to add a big shim
  for (i = classNames.length - 1; i >= 0; i--) {
    if (classNames[i] === classToRemove) {
      classNames.splice(i,1);
    }
  }

  element.className = classNames.join(' ');
};

/**
 * Element for testing browser HTML5 video capabilities
 * @type {Element}
 * @constant
 * @private
 */
vjs.TEST_VID = vjs.createEl('video');
(function() {
  var track = document.createElement('track');
  track.kind = 'captions';
  track.srclang = 'en';
  track.label = 'English';
  vjs.TEST_VID.appendChild(track);
})();

/**
 * Useragent for browser testing.
 * @type {String}
 * @constant
 * @private
 */
vjs.USER_AGENT = navigator.userAgent;

/**
 * Device is an iPhone
 * @type {Boolean}
 * @constant
 * @private
 */
vjs.IS_IPHONE = (/iPhone/i).test(vjs.USER_AGENT);
vjs.IS_IPAD = (/iPad/i).test(vjs.USER_AGENT);
vjs.IS_IPOD = (/iPod/i).test(vjs.USER_AGENT);
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 = (/Android/i).test(vjs.USER_AGENT);
vjs.ANDROID_VERSION = (function() {
  // This matches Android Major.Minor.Patch versions
  // ANDROID_VERSION is Major.Minor as a Number, if Minor isn't available, then only Major is returned
  var match = vjs.USER_AGENT.match(/Android (\d+)(?:\.(\d+))?(?:\.(\d+))*/i),
    major,
    minor;

  if (!match) {
    return null;
  }

  major = match[1] && parseFloat(match[1]);
  minor = match[2] && parseFloat(match[2]);

  if (major && minor) {
    return parseFloat(match[1] + '.' + match[2]);
  } else if (major) {
    return major;
  } else {
    return null;
  }
})();
// Old Android is defined as Version older than 2.3, and requiring a webkit version of the android browser
vjs.IS_OLD_ANDROID = vjs.IS_ANDROID && (/webkit/i).test(vjs.USER_AGENT) && vjs.ANDROID_VERSION < 2.3;

vjs.IS_FIREFOX = (/Firefox/i).test(vjs.USER_AGENT);
vjs.IS_CHROME = (/Chrome/i).test(vjs.USER_AGENT);
vjs.IS_IE8 = (/MSIE\s8\.0/).test(vjs.USER_AGENT);

vjs.TOUCH_ENABLED = !!(('ontouchstart' in window) || window.DocumentTouch && document instanceof window.DocumentTouch);
vjs.BACKGROUND_SIZE_SUPPORTED = 'backgroundSize' in vjs.TEST_VID.style;

/**
 * Apply attributes to an HTML element.
 * @param  {Element} el         Target element.
 * @param  {Object=} attributes Element attributes to be applied.
 * @private
 */
vjs.setElementAttributes = function(el, attributes){
  vjs.obj.each(attributes, function(attrName, attrValue) {
    if (attrValue === null || typeof attrValue === 'undefined' || attrValue === false) {
      el.removeAttribute(attrName);
    } else {
      el.setAttribute(attrName, (attrValue === true ? '' : attrValue));
    }
  });
};

/**
 * Get an element's attribute values, as defined on the HTML tag
 * Attributes 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}
 * @private
 */
vjs.getElementAttributes = function(tag){
  var obj, knownBooleans, attrs, attrName, attrVal;

  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
  knownBooleans = ','+'autoplay,controls,loop,muted,default'+',';

  if (tag && tag.attributes && tag.attributes.length > 0) {
    attrs = tag.attributes;

    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
 * @private
 */
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
 * @private
 */
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}
 * @private
 */
vjs.browser = {};

/**
 * 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
 * @private
 */
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
 * @private
 */
vjs.formatTime = function(seconds, guide) {
  // Default to using seconds as guide
  guide = guide || seconds;
  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);

  // handle invalid times
  if (isNaN(seconds) || seconds === Infinity) {
    // '-' is false for all relational operators (e.g. <, >=) so this setting
    // will add the minimum number of fields specified by the guide
    h = m = s = '-';
  }

  // 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
 * @private
 */
vjs.trim = function(str){
  return (str+'').replace(/^\s+|\s+$/g, '');
};

/**
 * 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
 * @private
 */
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
 * @private
 */
vjs.createTimeRange = function(start, end){
  return {
    length: 1,
    start: function() { return start; },
    end: function() { return end; }
  };
};

/**
 * Add to local storage (may removable)
 * @private
 */
vjs.setLocalStorage = function(key, value){
  try {
    // IE was throwing errors referencing the var anywhere without this
    var localStorage = window.localStorage || false;
    if (!localStorage) { return; }
    localStorage[key] = value;
  } catch(e) {
    if (e.code == 22 || e.code == 1014) { // Webkit == 22 / Firefox == 1014
      vjs.log('LocalStorage Full (VideoJS)', e);
    } else {
      if (e.code == 18) {
        vjs.log('LocalStorage not allowed (VideoJS)', e);
      } else {
        vjs.log('LocalStorage Error (VideoJS)', e);
      }
    }
  }
};

/**
 * Get absolute version of relative URL. Used to tell flash correct URL.
 * http://stackoverflow.com/questions/470832/getting-an-absolute-url-from-a-relative-one-ie6-issue
 * @param  {String} url URL to make absolute
 * @return {String}     Absolute URL
 * @private
 */
vjs.getAbsoluteURL = function(url){

  // Check if absolute URL
  if (!url.match(/^https?:\/\//)) {
    // Convert to absolute URL. Flash hosted off-site needs an absolute URL.
    url = vjs.createEl('div', {
      innerHTML: '<a href="'+url+'">x</a>'
    }).firstChild.href;
  }

  return url;
};


/**
 * Resolve and parse the elements of a URL
 * @param  {String} url The url to parse
 * @return {Object}     An object of url details
 */
vjs.parseUrl = function(url) {
  var div, a, addToBody, props, details;

  props = ['protocol', 'hostname', 'port', 'pathname', 'search', 'hash', 'host'];

  // add the url to an anchor and let the browser parse the URL
  a = vjs.createEl('a', { href: url });

  // IE8 (and 9?) Fix
  // ie8 doesn't parse the URL correctly until the anchor is actually
  // added to the body, and an innerHTML is needed to trigger the parsing
  addToBody = (a.host === '' && a.protocol !== 'file:');
  if (addToBody) {
    div = vjs.createEl('div');
    div.innerHTML = '<a href="'+url+'"></a>';
    a = div.firstChild;
    // prevent the div from affecting layout
    div.setAttribute('style', 'display:none; position:absolute;');
    document.body.appendChild(div);
  }

  // Copy the specific URL properties to a new object
  // This is also needed for IE8 because the anchor loses its
  // properties when it's removed from the dom
  details = {};
  for (var i = 0; i < props.length; i++) {
    details[props[i]] = a[props[i]];
  }

  // IE9 adds the port to the host property unlike everyone else. If
  // a port identifier is added for standard ports, strip it.
  if (details.protocol === 'http:') {
    details.host = details.host.replace(/:80$/, '');
  }
  if (details.protocol === 'https:') {
    details.host = details.host.replace(/:443$/, '');
  }

  if (addToBody) {
    document.body.removeChild(div);
  }

  return details;
};

/**
 * Log messages to the console and history based on the type of message
 *
 * @param  {String} type The type of message, or `null` for `log`
 * @param  {[type]} args The args to be passed to the log
 * @private
 */
function _logType(type, args){
  var argsArray, noop, console;

  // convert args to an array to get array functions
  argsArray = Array.prototype.slice.call(args);
  // if there's no console then don't try to output messages
  // they will still be stored in vjs.log.history
  // Was setting these once outside of this function, but containing them
  // in the function makes it easier to test cases where console doesn't exist
  noop = function(){};
  console = window['console'] || {
    'log': noop,
    'warn': noop,
    'error': noop
  };

  if (type) {
    // add the type to the front of the message
    argsArray.unshift(type.toUpperCase()+':');
  } else {
    // default to log with no prefix
    type = 'log';
  }

  // add to history
  vjs.log.history.push(argsArray);

  // add console prefix after adding to history
  argsArray.unshift('VIDEOJS:');

  // call appropriate log function
  if (console[type].apply) {
    console[type].apply(console, argsArray);
  } else {
    // ie8 doesn't allow error.apply, but it will just join() the array anyway
    console[type](argsArray.join(' '));
  }
}

/**
 * Log plain debug messages
 */
vjs.log = function(){
  _logType(null, arguments);
};

/**
 * Keep a history of log messages
 * @type {Array}
 */
vjs.log.history = [];

/**
 * Log error messages
 */
vjs.log.error = function(){
  _logType('error', arguments);
};

/**
 * Log warning messages
 */
vjs.log.warn = function(){
  _logType('warn', arguments);
};

// Offset Left
// getBoundingClientRect technique from John Resig http://ejohn.org/blog/getboundingclientrect-is-awesome/
vjs.findPosition = function(el) {
  var box, docEl, body, clientLeft, scrollLeft, left, clientTop, scrollTop, top;

  if (el.getBoundingClientRect && el.parentNode) {
    box = el.getBoundingClientRect();
  }

  if (!box) {
    return {
      left: 0,
      top: 0
    };
  }

  docEl = document.documentElement;
  body = document.body;

  clientLeft = docEl.clientLeft || body.clientLeft || 0;
  scrollLeft = window.pageXOffset || body.scrollLeft;
  left = box.left + scrollLeft - clientLeft;

  clientTop = docEl.clientTop || body.clientTop || 0;
  scrollTop = window.pageYOffset || body.scrollTop;
  top = box.top + scrollTop - clientTop;

  // Android sometimes returns slightly off decimal values, so need to round
  return {
    left: vjs.round(left),
    top: vjs.round(top)
  };
};

/**
 * Array functions container
 * @type {Object}
 * @private
 */
vjs.arr = {};

/*
 * Loops through an array and runs a function for each item inside it.
 * @param  {Array}    array       The array
 * @param  {Function} callback    The function to be run for each item
 * @param  {*}        thisArg     The `this` binding of callback
 * @returns {Array}               The array
 * @private
 */
vjs.arr.forEach = function(array, callback, thisArg) {
  if (vjs.obj.isArray(array) && callback instanceof Function) {
    for (var i = 0, len = array.length; i < len; ++i) {
      callback.call(thisArg || vjs, array[i], i, array);
    }
  }

  return array;
};
/**
 * Simple http request for retrieving external files (e.g. text tracks)
 *
 * ##### Example
 *
 *     // using url string
 *     videojs.xhr('http://example.com/myfile.vtt', function(error, response, responseBody){});
 *
 *     // or options block
 *     videojs.xhr({
 *       uri: 'http://example.com/myfile.vtt',
 *       method: 'GET',
 *       responseType: 'text'
 *     }, function(error, response, responseBody){
 *       if (error) {
 *         // log the error
 *       } else {
 *         // successful, do something with the response
 *       }
 *     });
 *
 *
 * API is modeled after the Raynos/xhr, which we hope to use after
 * getting browserify implemented.
 * https://github.com/Raynos/xhr/blob/master/index.js
 *
 * @param  {Object|String}  options   Options block or URL string
 * @param  {Function}       callback  The callback function
 * @returns {Object}                  The request
 */
vjs.xhr = function(options, callback){
  var XHR, request, urlInfo, winLoc, fileUrl, crossOrigin, abortTimeout, successHandler, errorHandler;

  // If options is a string it's the url
  if (typeof options === 'string') {
    options = {
      uri: options
    };
  }

  // Merge with default options
  videojs.util.mergeOptions({
    method: 'GET',
    timeout: 45 * 1000
  }, options);

  callback = callback || function(){};

  successHandler = function(){
    window.clearTimeout(abortTimeout);
    callback(null, request, request.response || request.responseText);
  };

  errorHandler = function(err){
    window.clearTimeout(abortTimeout);

    if (!err || typeof err === 'string') {
      err = new Error(err);
    }

    callback(err, request);
  };

  XHR = window.XMLHttpRequest;

  if (typeof XHR === 'undefined') {
    // Shim XMLHttpRequest for older IEs
    XHR = function () {
      try { return new window.ActiveXObject('Msxml2.XMLHTTP.6.0'); } catch (e) {}
      try { return new window.ActiveXObject('Msxml2.XMLHTTP.3.0'); } catch (f) {}
      try { return new window.ActiveXObject('Msxml2.XMLHTTP'); } catch (g) {}
      throw new Error('This browser does not support XMLHttpRequest.');
    };
  }

  request = new XHR();
  // Store a reference to the url on the request instance
  request.uri = options.uri;

  urlInfo = vjs.parseUrl(options.uri);
  winLoc = window.location;
  // Check if url is for another domain/origin
  // IE8 doesn't know location.origin, so we won't rely on it here
  crossOrigin = (urlInfo.protocol + urlInfo.host) !== (winLoc.protocol + winLoc.host);

  // XDomainRequest -- Use for IE if XMLHTTPRequest2 isn't available
  // 'withCredentials' is only available in XMLHTTPRequest2
  // Also XDomainRequest has a lot of gotchas, so only use if cross domain
  if (crossOrigin && window.XDomainRequest && !('withCredentials' in request)) {
    request = new window.XDomainRequest();
    request.onload = successHandler;
    request.onerror = errorHandler;
    // These blank handlers need to be set to fix ie9
    // http://cypressnorth.com/programming/internet-explorer-aborting-ajax-requests-fixed/
    request.onprogress = function(){};
    request.ontimeout = function(){};

  // XMLHTTPRequest
  } else {
    fileUrl = (urlInfo.protocol == 'file:' || winLoc.protocol == 'file:');

    request.onreadystatechange = function() {
      if (request.readyState === 4) {
        if (request.timedout) {
          return errorHandler('timeout');
        }

        if (request.status === 200 || fileUrl && request.status === 0) {
          successHandler();
        } else {
          errorHandler();
        }
      }
    };

    if (options.timeout) {
      abortTimeout = window.setTimeout(function() {
        if (request.readyState !== 4) {
          request.timedout = true;
          request.abort();
        }
      }, options.timeout);
    }
  }

  // open the connection
  try {
    // Third arg is async, or ignored by XDomainRequest
    request.open(options.method || 'GET', options.uri, true);
  } catch(err) {
    return errorHandler(err);
  }

  // withCredentials only supported by XMLHttpRequest2
  if(options.withCredentials) {
    request.withCredentials = true;
  }

  if (options.responseType) {
    request.responseType = options.responseType;
  }

  // send the request
  try {
    request.send();
  } catch(err) {
    return errorHandler(err);
  }

  return request;
};
/**
 * Utility functions namespace
 * @namespace
 * @type {Object}
 */
vjs.util = {};

/**
 * Merge two options objects, recursively merging any plain object properties as
 * well.  Previously `deepMerge`
 *
 * @param  {Object} obj1 Object to override values in
 * @param  {Object} obj2 Overriding object
 * @return {Object}      New object -- obj1 and obj2 will be untouched
 */
vjs.util.mergeOptions = function(obj1, obj2){
  var key, val1, val2;

  // make a copy of obj1 so we're not overwriting original values.
  // like prototype.options_ and all sub options objects
  obj1 = vjs.obj.copy(obj1);

  for (key in obj2){
    if (obj2.hasOwnProperty(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.util.mergeOptions(val1, val2);
      } else {
        obj1[key] = obj2[key];
      }
    }
  }
  return obj1;
};vjs.EventEmitter = function() {
};

vjs.EventEmitter.prototype.allowedEvents_ = {
};

vjs.EventEmitter.prototype.on = function(type, fn) {
  // Remove the addEventListener alias before calling vjs.on
  // so we don't get into an infinite type loop
  var ael = this.addEventListener;
  this.addEventListener = Function.prototype;
  vjs.on(this, type, fn);
  this.addEventListener = ael;
};
vjs.EventEmitter.prototype.addEventListener = vjs.EventEmitter.prototype.on;

vjs.EventEmitter.prototype.off = function(type, fn) {
  vjs.off(this, type, fn);
};
vjs.EventEmitter.prototype.removeEventListener = vjs.EventEmitter.prototype.off;

vjs.EventEmitter.prototype.one = function(type, fn) {
  vjs.one(this, type, fn);
};

vjs.EventEmitter.prototype.trigger = function(event) {
  var type = event.type || event;

  if (typeof event === 'string') {
    event = {
      type: type
    };
  }
  event = vjs.fixEvent(event);

  if (this.allowedEvents_[type] && this['on' + type]) {
    this['on' + type](event);
  }

  vjs.trigger(this, event);
};
// The standard DOM EventTarget.dispatchEvent() is aliased to trigger()
vjs.EventEmitter.prototype.dispatchEvent = vjs.EventEmitter.prototype.trigger;
/**
 * @fileoverview Player Component - Base class for all UI objects
 *
 */

/**
 * Base UI Component class
 *
 * Components are embeddable UI objects that are represented by both a
 * javascript object and an element in the DOM. They can be children of other
 * components, and can have many children themselves.
 *
 *     // adding a button to the player
 *     var button = player.addChild('button');
 *     button.el(); // -> button element
 *
 *     <div class="video-js">
 *       <div class="vjs-button">Button</div>
 *     </div>
 *
 * Components are also event emitters.
 *
 *     button.on('click', function(){
 *       console.log('Button Clicked!');
 *     });
 *
 *     button.trigger('customevent');
 *
 * @param {Object} player  Main Player
 * @param {Object=} options
 * @class
 * @constructor
 * @extends vjs.CoreObject
 */
vjs.Component = vjs.CoreObject.extend({
  /**
   * the constructor function for the class
   *
   * @constructor
   */
  init: function(player, options, ready){
    this.player_ = player;

    // Make a copy of prototype.options_ to protect against overriding global defaults
    this.options_ = vjs.obj.copy(this.options_);

    // Updated options with supplied options
    options = this.options(options);

    // Get ID from options or options element if one is supplied
    this.id_ = options['id'] || (options['el'] && options['el']['id']);

    // If there was no ID from the options, generate one
    if (!this.id_) {
      // Don't require the player ID function in the case of mock players
      this.id_ = ((player.id && player.id()) || 'no_player') + '_component_' + vjs.guid++;
    }

    this.name_ = options['name'] || null;

    // Create element if one wasn't provided in options
    this.el_ = options['el'] || this.createEl();

    this.children_ = [];
    this.childIndex_ = {};
    this.childNameIndex_ = {};

    // Add any child components in options
    this.initChildren();

    this.ready(ready);
    // Don't want to trigger ready here or it will before init is actually
    // finished for all children that run this constructor

    if (options.reportTouchActivity !== false) {
      this.enableTouchActivity();
    }
  }
});

/**
 * Dispose of the component and all child components
 */
vjs.Component.prototype.dispose = function(){
  this.trigger({ type: 'dispose', 'bubbles': false });

  // Dispose all children.
  if (this.children_) {
    for (var i = this.children_.length - 1; i >= 0; i--) {
      if (this.children_[i].dispose) {
        this.children_[i].dispose();
      }
    }
  }

  // Delete child references
  this.children_ = null;
  this.childIndex_ = null;
  this.childNameIndex_ = null;

  // Remove all event listeners.
  this.off();

  // Remove element from DOM
  if (this.el_.parentNode) {
    this.el_.parentNode.removeChild(this.el_);
  }

  vjs.removeData(this.el_);
  this.el_ = null;
};

/**
 * Reference to main player instance
 *
 * @type {vjs.Player}
 * @private
 */
vjs.Component.prototype.player_ = true;

/**
 * Return the component's player
 *
 * @return {vjs.Player}
 */
vjs.Component.prototype.player = function(){
  return this.player_;
};

/**
 * The component's options object
 *
 * @type {Object}
 * @private
 */
vjs.Component.prototype.options_;

/**
 * Deep merge of options objects
 *
 * Whenever a property is an object on both options objects
 * the two properties will be merged using vjs.obj.deepMerge.
 *
 * This is used for merging options for child components. We
 * want it to be easy to override individual options on a child
 * component without having to rewrite all the other default options.
 *
 *     Parent.prototype.options_ = {
 *       children: {
 *         'childOne': { 'foo': 'bar', 'asdf': 'fdsa' },
 *         'childTwo': {},
 *         'childThree': {}
 *       }
 *     }
 *     newOptions = {
 *       children: {
 *         'childOne': { 'foo': 'baz', 'abc': '123' }
 *         'childTwo': null,
 *         'childFour': {}
 *       }
 *     }
 *
 *     this.options(newOptions);
 *
 * RESULT
 *
 *     {
 *       children: {
 *         'childOne': { 'foo': 'baz', 'asdf': 'fdsa', 'abc': '123' },
 *         'childTwo': null, // Disabled. Won't be initialized.
 *         'childThree': {},
 *         'childFour': {}
 *       }
 *     }
 *
 * @param  {Object} obj Object of new option values
 * @return {Object}     A NEW object of this.options_ and obj merged
 */
vjs.Component.prototype.options = function(obj){
  if (obj === undefined) return this.options_;

  return this.options_ = vjs.util.mergeOptions(this.options_, obj);
};

/**
 * The DOM element for the component
 *
 * @type {Element}
 * @private
 */
vjs.Component.prototype.el_;

/**
 * Create the component's DOM element
 *
 * @param  {String=} tagName  Element's node type. e.g. 'div'
 * @param  {Object=} attributes An object of element attributes that should be set on the element
 * @return {Element}
 */
vjs.Component.prototype.createEl = function(tagName, attributes){
  return vjs.createEl(tagName, attributes);
};

vjs.Component.prototype.localize = function(string){
  var lang = this.player_.language(),
      languages = this.player_.languages();
  if (languages && languages[lang] && languages[lang][string]) {
    return languages[lang][string];
  }
  return string;
};

/**
 * Get the component's DOM element
 *
 *     var domEl = myComponent.el();
 *
 * @return {Element}
 */
vjs.Component.prototype.el = function(){
  return this.el_;
};

/**
 * An optional element where, if defined, children will be inserted instead of
 * directly in `el_`
 *
 * @type {Element}
 * @private
 */
vjs.Component.prototype.contentEl_;

/**
 * Return the component's DOM element for embedding content.
 * Will either be el_ or a new element defined in createEl.
 *
 * @return {Element}
 */
vjs.Component.prototype.contentEl = function(){
  return this.contentEl_ || this.el_;
};

/**
 * The ID for the component
 *
 * @type {String}
 * @private
 */
vjs.Component.prototype.id_;

/**
 * Get the component's ID
 *
 *     var id = myComponent.id();
 *
 * @return {String}
 */
vjs.Component.prototype.id = function(){
  return this.id_;
};

/**
 * The name for the component. Often used to reference the component.
 *
 * @type {String}
 * @private
 */
vjs.Component.prototype.name_;

/**
 * Get the component's name. The name is often used to reference the component.
 *
 *     var name = myComponent.name();
 *
 * @return {String}
 */
vjs.Component.prototype.name = function(){
  return this.name_;
};

/**
 * Array of child components
 *
 * @type {Array}
 * @private
 */
vjs.Component.prototype.children_;

/**
 * Get an array of all child components
 *
 *     var kids = myComponent.children();
 *
 * @return {Array} The children
 */
vjs.Component.prototype.children = function(){
  return this.children_;
};

/**
 * Object of child components by ID
 *
 * @type {Object}
 * @private
 */
vjs.Component.prototype.childIndex_;

/**
 * Returns a child component with the provided ID
 *
 * @return {vjs.Component}
 */
vjs.Component.prototype.getChildById = function(id){
  return this.childIndex_[id];
};

/**
 * Object of child components by name
 *
 * @type {Object}
 * @private
 */
vjs.Component.prototype.childNameIndex_;

/**
 * Returns a child component with the provided name
 *
 * @return {vjs.Component}
 */
vjs.Component.prototype.getChild = function(name){
  return this.childNameIndex_[name];
};

/**
 * Adds a child component inside this component
 *
 *     myComponent.el();
 *     // -> <div class='my-component'></div>
 *     myComonent.children();
 *     // [empty array]
 *
 *     var myButton = myComponent.addChild('MyButton');
 *     // -> <div class='my-component'><div class="my-button">myButton<div></div>
 *     // -> myButton === myComonent.children()[0];
 *
 * Pass in options for child constructors and options for children of the child
 *
 *     var myButton = myComponent.addChild('MyButton', {
 *       text: 'Press Me',
 *       children: {
 *         buttonChildExample: {
 *           buttonChildOption: true
 *         }
 *       }
 *     });
 *
 * @param {String|vjs.Component} child The class name or instance of a child to add
 * @param {Object=} options Options, including options to be passed to children of the child.
 * @return {vjs.Component} The child component (created by this process if a string was used)
 * @suppress {accessControls|checkRegExp|checkTypes|checkVars|const|constantProperty|deprecated|duplicate|es5Strict|fileoverviewTags|globalThis|invalidCasts|missingProperties|nonStandardJsDocs|strictModuleDepCheck|undefinedNames|undefinedVars|unknownDefines|uselessCode|visibility}
 */
vjs.Component.prototype.addChild = function(child, options){
  var component, componentClass, componentName;

  // If child is a string, create new component with options
  if (typeof child === 'string') {
    componentName = child;

    // Make sure options is at least an empty object to protect against errors
    options = options || {};

    // If no componentClass in options, assume componentClass is the name lowercased
    // (e.g. playButton)
    componentClass = options['componentClass'] || vjs.capitalize(componentName);

    // Set name through options
    options['name'] = componentName;

    // Create a new object & element for this controls set
    // If there's no .player_, this is a player
    // Closure Compiler throws an 'incomplete alias' warning if we use the vjs variable directly.
    // Every class should be exported, so this should never be a problem here.
    component = new window['videojs'][componentClass](this.player_ || this, options);

  // child is a component instance
  } else {
    component = child;
  }

  this.children_.push(component);

  if (typeof component.id === 'function') {
    this.childIndex_[component.id()] = component;
  }

  // If a name wasn't used to create the component, check if we can use the
  // name function of the component
  componentName = componentName || (component.name && component.name());

  if (componentName) {
    this.childNameIndex_[componentName] = component;
  }

  // Add the UI object's element to the container div (box)
  // Having an element is not required
  if (typeof component['el'] === 'function' && component['el']()) {
    this.contentEl().appendChild(component['el']());
  }

  // Return so it can stored on parent object if desired.
  return component;
};

/**
 * Remove a child component from this component's list of children, and the
 * child component's element from this component's element
 *
 * @param  {vjs.Component} component Component to remove
 */
vjs.Component.prototype.removeChild = function(component){
  if (typeof component === 'string') {
    component = this.getChild(component);
  }

  if (!component || !this.children_) return;

  var childFound = false;
  for (var i = this.children_.length - 1; i >= 0; i--) {
    if (this.children_[i] === component) {
      childFound = true;
      this.children_.splice(i,1);
      break;
    }
  }

  if (!childFound) return;

  this.childIndex_[component.id()] = null;
  this.childNameIndex_[component.name()] = null;

  var compEl = component.el();
  if (compEl && compEl.parentNode === this.contentEl()) {
    this.contentEl().removeChild(component.el());
  }
};

/**
 * Add and initialize default child components from options
 *
 *     // when an instance of MyComponent is created, all children in options
 *     // will be added to the instance by their name strings and options
 *     MyComponent.prototype.options_.children = {
 *       myChildComponent: {
 *         myChildOption: true
 *       }
 *     }
 *
 *     // Or when creating the component
 *     var myComp = new MyComponent(player, {
 *       children: {
 *         myChildComponent: {
 *           myChildOption: true
 *         }
 *       }
 *     });
 *
 * The children option can also be an Array of child names or
 * child options objects (that also include a 'name' key).
 *
 *     var myComp = new MyComponent(player, {
 *       children: [
 *         'button',
 *         {
 *           name: 'button',
 *           someOtherOption: true
 *         }
 *       ]
 *     });
 *
 */
vjs.Component.prototype.initChildren = function(){
  var parent, parentOptions, children, child, name, opts, handleAdd;

  parent = this;
  parentOptions = parent.options();
  children = parentOptions['children'];

  if (children) {
    handleAdd = function(name, opts){
      // Allow options for children to be set at the parent options
      // e.g. videojs(id, { controlBar: false });
      // instead of videojs(id, { children: { controlBar: false });
      if (parentOptions[name] !== undefined) {
        opts = parentOptions[name];
      }

      // Allow for disabling default components
      // e.g. vjs.options['children']['posterImage'] = false
      if (opts === false) return;

      // Create and add the child component.
      // Add a direct reference to the child by name on the parent instance.
      // If two of the same component are used, different names should be supplied
      // for each
      parent[name] = parent.addChild(name, opts);
    };

    // Allow for an array of children details to passed in the options
    if (vjs.obj.isArray(children)) {
      for (var i = 0; i < children.length; i++) {
        child = children[i];

        if (typeof child == 'string') {
          // ['myComponent']
          name = child;
          opts = {};
        } else {
          // [{ name: 'myComponent', otherOption: true }]
          name = child.name;
          opts = child;
        }

        handleAdd(name, opts);
      }
    } else {
      vjs.obj.each(children, handleAdd);
    }
  }
};

/**
 * Allows sub components to stack CSS class names
 *
 * @return {String} The constructed class name
 */
vjs.Component.prototype.buildCSSClass = function(){
    // Child classes can include a function that does:
    // return 'CLASS NAME' + this._super();
    return '';
};

/* Events
============================================================================= */

/**
 * Add an event listener to this component's element
 *
 *     var myFunc = function(){
 *       var myComponent = this;
 *       // Do something when the event is fired
 *     };
 *
 *     myComponent.on('eventType', myFunc);
 *
 * The context of myFunc will be myComponent unless previously bound.
 *
 * Alternatively, you can add a listener to another element or component.
 *
 *     myComponent.on(otherElement, 'eventName', myFunc);
 *     myComponent.on(otherComponent, 'eventName', myFunc);
 *
 * The benefit of using this over `vjs.on(otherElement, 'eventName', myFunc)`
 * and `otherComponent.on('eventName', myFunc)` is that this way the listeners
 * will be automatically cleaned up when either component is disposed.
 * It will also bind myComponent as the context of myFunc.
 *
 * **NOTE**: When using this on elements in the page other than window
 * and document (both permanent), if you remove the element from the DOM
 * you need to call `vjs.trigger(el, 'dispose')` on it to clean up
 * references to it and allow the browser to garbage collect it.
 *
 * @param  {String|vjs.Component} first   The event type or other component
 * @param  {Function|String}      second  The event handler or event type
 * @param  {Function}             third   The event handler
 * @return {vjs.Component}        self
 */
vjs.Component.prototype.on = function(first, second, third){
  var target, type, fn, removeOnDispose, cleanRemover, thisComponent;

  if (typeof first === 'string' || vjs.obj.isArray(first)) {
    vjs.on(this.el_, first, vjs.bind(this, second));

  // Targeting another component or element
  } else {
    target = first;
    type = second;
    fn = vjs.bind(this, third);
    thisComponent = this;

    // When this component is disposed, remove the listener from the other component
    removeOnDispose = function(){
      thisComponent.off(target, type, fn);
    };
    // Use the same function ID so we can remove it later it using the ID
    // of the original listener
    removeOnDispose.guid = fn.guid;
    this.on('dispose', removeOnDispose);

    // If the other component is disposed first we need to clean the reference
    // to the other component in this component's removeOnDispose listener
    // Otherwise we create a memory leak.
    cleanRemover = function(){
      thisComponent.off('dispose', removeOnDispose);
    };
    // Add the same function ID so we can easily remove it later
    cleanRemover.guid = fn.guid;

    // Check if this is a DOM node
    if (first.nodeName) {
      // Add the listener to the other element
      vjs.on(target, type, fn);
      vjs.on(target, 'dispose', cleanRemover);

    // Should be a component
    // Not using `instanceof vjs.Component` because it makes mock players difficult
    } else if (typeof first.on === 'function') {
      // Add the listener to the other component
      target.on(type, fn);
      target.on('dispose', cleanRemover);
    }
  }

  return this;
};

/**
 * Remove an event listener from this component's element
 *
 *     myComponent.off('eventType', myFunc);
 *
 * If myFunc is excluded, ALL listeners for the event type will be removed.
 * If eventType is excluded, ALL listeners will be removed from the component.
 *
 * Alternatively you can use `off` to remove listeners that were added to other
 * elements or components using `myComponent.on(otherComponent...`.
 * In this case both the event type and listener function are REQUIRED.
 *
 *     myComponent.off(otherElement, 'eventType', myFunc);
 *     myComponent.off(otherComponent, 'eventType', myFunc);
 *
 * @param  {String=|vjs.Component}  first  The event type or other component
 * @param  {Function=|String}       second The listener function or event type
 * @param  {Function=}              third  The listener for other component
 * @return {vjs.Component}
 */
vjs.Component.prototype.off = function(first, second, third){
  var target, otherComponent, type, fn, otherEl;

  if (!first || typeof first === 'string' || vjs.obj.isArray(first)) {
    vjs.off(this.el_, first, second);
  } else {
    target = first;
    type = second;
    // Ensure there's at least a guid, even if the function hasn't been used
    fn = vjs.bind(this, third);

    // Remove the dispose listener on this component,
    // which was given the same guid as the event listener
    this.off('dispose', fn);

    if (first.nodeName) {
      // Remove the listener
      vjs.off(target, type, fn);
      // Remove the listener for cleaning the dispose listener
      vjs.off(target, 'dispose', fn);
    } else {
      target.off(type, fn);
      target.off('dispose', fn);
    }
  }

  return this;
};

/**
 * Add an event listener to be triggered only once and then removed
 *
 *     myComponent.one('eventName', myFunc);
 *
 * Alternatively you can add a listener to another element or component
 * that will be triggered only once.
 *
 *     myComponent.one(otherElement, 'eventName', myFunc);
 *     myComponent.one(otherComponent, 'eventName', myFunc);
 *
 * @param  {String|vjs.Component}  first   The event type or other component
 * @param  {Function|String}       second  The listener function or event type
 * @param  {Function=}             third   The listener function for other component
 * @return {vjs.Component}
 */
vjs.Component.prototype.one = function(first, second, third) {
  var target, type, fn, thisComponent, newFunc;

  if (typeof first === 'string' || vjs.obj.isArray(first)) {
    vjs.one(this.el_, first, vjs.bind(this, second));
  } else {
    target = first;
    type = second;
    fn = vjs.bind(this, third);
    thisComponent = this;

    newFunc = function(){
      thisComponent.off(target, type, newFunc);
      fn.apply(this, arguments);
    };
    // Keep the same function ID so we can remove it later
    newFunc.guid = fn.guid;

    this.on(target, type, newFunc);
  }

  return this;
};

/**
 * Trigger an event on an element
 *
 *     myComponent.trigger('eventName');
 *     myComponent.trigger({'type':'eventName'});
 *
 * @param  {Event|Object|String} event  A string (the type) or an event object with a type attribute
 * @return {vjs.Component}       self
 */
vjs.Component.prototype.trigger = function(event){
  vjs.trigger(this.el_, event);
  return this;
};

/* Ready
================================================================================ */
/**
 * Is the component loaded
 * This can mean different things depending on the component.
 *
 * @private
 * @type {Boolean}
 */
vjs.Component.prototype.isReady_;

/**
 * Trigger ready as soon as initialization is finished
 *
 * Allows for delaying ready. Override on a sub class prototype.
 * If you set this.isReadyOnInitFinish_ it will affect all components.
 * Specially used when waiting for the Flash player to asynchronously load.
 *
 * @type {Boolean}
 * @private
 */
vjs.Component.prototype.isReadyOnInitFinish_ = true;

/**
 * List of ready listeners
 *
 * @type {Array}
 * @private
 */
vjs.Component.prototype.readyQueue_;

/**
 * Bind a listener to the component's ready state
 *
 * Different from event listeners in that if the ready event has already happened
 * it will trigger the function immediately.
 *
 * @param  {Function} fn Ready listener
 * @return {vjs.Component}
 */
vjs.Component.prototype.ready = function(fn){
  if (fn) {
    if (this.isReady_) {
      fn.call(this);
    } else {
      if (this.readyQueue_ === undefined) {
        this.readyQueue_ = [];
      }
      this.readyQueue_.push(fn);
    }
  }
  return this;
};

/**
 * Trigger the ready listeners
 *
 * @return {vjs.Component}
 */
vjs.Component.prototype.triggerReady = function(){
  this.isReady_ = true;

  var readyQueue = this.readyQueue_;

  if (readyQueue && readyQueue.length > 0) {

    for (var i = 0, j = readyQueue.length; i < j; i++) {
      readyQueue[i].call(this);
    }

    // Reset Ready Queue
    this.readyQueue_ = [];

    // Allow for using event listeners also, in case you want to do something everytime a source is ready.
    this.trigger('ready');
  }
};

/* Display
============================================================================= */

/**
 * Check if a component's element has a CSS class name
 *
 * @param {String} classToCheck Classname to check
 * @return {vjs.Component}
 */
vjs.Component.prototype.hasClass = function(classToCheck){
  return vjs.hasClass(this.el_, classToCheck);
};

/**
 * Add a CSS class name to the component's element
 *
 * @param {String} classToAdd Classname to add
 * @return {vjs.Component}
 */
vjs.Component.prototype.addClass = function(classToAdd){
  vjs.addClass(this.el_, classToAdd);
  return this;
};

/**
 * Remove a CSS class name from the component's element
 *
 * @param {String} classToRemove Classname to remove
 * @return {vjs.Component}
 */
vjs.Component.prototype.removeClass = function(classToRemove){
  vjs.removeClass(this.el_, classToRemove);
  return this;
};

/**
 * Show the component element if hidden
 *
 * @return {vjs.Component}
 */
vjs.Component.prototype.show = function(){
  this.removeClass('vjs-hidden');
  return this;
};

/**
 * Hide the component element if currently showing
 *
 * @return {vjs.Component}
 */
vjs.Component.prototype.hide = function(){
  this.addClass('vjs-hidden');
  return this;
};

/**
 * Lock an item in its visible state
 * To be used with fadeIn/fadeOut.
 *
 * @return {vjs.Component}
 * @private
 */
vjs.Component.prototype.lockShowing = function(){
  this.addClass('vjs-lock-showing');
  return this;
};

/**
 * Unlock an item to be hidden
 * To be used with fadeIn/fadeOut.
 *
 * @return {vjs.Component}
 * @private
 */
vjs.Component.prototype.unlockShowing = function(){
  this.removeClass('vjs-lock-showing');
  return this;
};

/**
 * Disable component by making it unshowable
 *
 * Currently private because we're moving towards more css-based states.
 * @private
 */
vjs.Component.prototype.disable = function(){
  this.hide();
  this.show = function(){};
};

/**
 * Set or get the width of the component (CSS values)
 *
 * Setting the video tag dimension values only works with values in pixels.
 * Percent values will not work.
 * Some percents can be used, but width()/height() will return the number + %,
 * not the actual computed width/height.
 *
 * @param  {Number|String=} num   Optional width number
 * @param  {Boolean} skipListeners Skip the 'resize' event trigger
 * @return {vjs.Component} This component, when setting the width
 * @return {Number|String} The width, when getting
 */
vjs.Component.prototype.width = function(num, skipListeners){
  return this.dimension('width', num, skipListeners);
};

/**
 * Get or set the height of the component (CSS values)
 *
 * Setting the video tag dimension values only works with values in pixels.
 * Percent values will not work.
 * Some percents can be used, but width()/height() will return the number + %,
 * not the actual computed width/height.
 *
 * @param  {Number|String=} num     New component height
 * @param  {Boolean=} skipListeners Skip the resize event trigger
 * @return {vjs.Component} This component, when setting the height
 * @return {Number|String} The height, when getting
 */
vjs.Component.prototype.height = function(num, skipListeners){
  return this.dimension('height', num, skipListeners);
};

/**
 * Set both width and height at the same time
 *
 * @param  {Number|String} width
 * @param  {Number|String} height
 * @return {vjs.Component} The component
 */
vjs.Component.prototype.dimensions = function(width, height){
  // Skip resize listeners on width for optimization
  return this.width(width, true).height(height);
};

/**
 * Get or set width or height
 *
 * This is the shared code for the width() and height() methods.
 * All for an integer, integer + 'px' or integer + '%';
 *
 * Known issue: Hidden elements officially have a width of 0. We're defaulting
 * to the style.width value and falling back to computedStyle which has the
 * hidden element issue. Info, but probably not an efficient fix:
 * http://www.foliotek.com/devblog/getting-the-width-of-a-hidden-element-with-jquery-using-width/
 *
 * @param  {String} widthOrHeight  'width' or 'height'
 * @param  {Number|String=} num     New dimension
 * @param  {Boolean=} skipListeners Skip resize event trigger
 * @return {vjs.Component} The component if a dimension was set
 * @return {Number|String} The dimension if nothing was set
 * @private
 */
vjs.Component.prototype.dimension = function(widthOrHeight, num, skipListeners){
  if (num !== undefined) {
    if (num === null || vjs.isNaN(num)) {
      num = 0;
    }

    // Check if using css width/height (% or px) and adjust
    if ((''+num).indexOf('%') !== -1 || (''+num).indexOf('px') !== -1) {
      this.el_.style[widthOrHeight] = num;
    } else if (num === 'auto') {
      this.el_.style[widthOrHeight] = '';
    } else {
      this.el_.style[widthOrHeight] = num+'px';
    }

    // skipListeners allows us to avoid triggering the resize event when setting both width and height
    if (!skipListeners) { this.trigger('resize'); }

    // Return component
    return this;
  }

  // Not setting a value, so getting it
  // Make sure element exists
  if (!this.el_) return 0;

  // Get dimension value from style
  var val = this.el_.style[widthOrHeight];
  var pxIndex = val.indexOf('px');
  if (pxIndex !== -1) {
    // Return the pixel value with no 'px'
    return parseInt(val.slice(0,pxIndex), 10);

  // No px so using % or no style was set, so falling back to offsetWidth/height
  // If component has display:none, offset will return 0
  // TODO: handle display:none and no dimension style using px
  } else {

    return parseInt(this.el_['offset'+vjs.capitalize(widthOrHeight)], 10);

    // ComputedStyle version.
    // Only difference is if the element is hidden it will return
    // the percent value (e.g. '100%'')
    // instead of zero like offsetWidth returns.
    // var val = vjs.getComputedStyleValue(this.el_, widthOrHeight);
    // var pxIndex = val.indexOf('px');

    // if (pxIndex !== -1) {
    //   return val.slice(0, pxIndex);
    // } else {
    //   return val;
    // }
  }
};

/**
 * Fired when the width and/or height of the component changes
 * @event resize
 */
vjs.Component.prototype.onResize;

/**
 * Emit 'tap' events when touch events are supported
 *
 * This is used to support toggling the controls through a tap on the video.
 *
 * We're requiring them to be enabled because otherwise every component would
 * have this extra overhead unnecessarily, on mobile devices where extra
 * overhead is especially bad.
 * @private
 */
vjs.Component.prototype.emitTapEvents = function(){
  var touchStart, firstTouch, touchTime, couldBeTap, noTap,
      xdiff, ydiff, touchDistance, tapMovementThreshold, touchTimeThreshold;

  // Track the start time so we can determine how long the touch lasted
  touchStart = 0;
  firstTouch = null;

  // Maximum movement allowed during a touch event to still be considered a tap
  // Other popular libs use anywhere from 2 (hammer.js) to 15, so 10 seems like a nice, round number.
  tapMovementThreshold = 10;

  // The maximum length a touch can be while still being considered a tap
  touchTimeThreshold = 200;

  this.on('touchstart', function(event) {
    // If more than one finger, don't consider treating this as a click
    if (event.touches.length === 1) {
      firstTouch = vjs.obj.copy(event.touches[0]);
      // Record start time so we can detect a tap vs. "touch and hold"
      touchStart = new Date().getTime();
      // Reset couldBeTap tracking
      couldBeTap = true;
    }
  });

  this.on('touchmove', function(event) {
    // If more than one finger, don't consider treating this as a click
    if (event.touches.length > 1) {
      couldBeTap = false;
    } else if (firstTouch) {
      // Some devices will throw touchmoves for all but the slightest of taps.
      // So, if we moved only a small distance, this could still be a tap
      xdiff = event.touches[0].pageX - firstTouch.pageX;
      ydiff = event.touches[0].pageY - firstTouch.pageY;
      touchDistance = Math.sqrt(xdiff * xdiff + ydiff * ydiff);
      if (touchDistance > tapMovementThreshold) {
        couldBeTap = false;
      }
    }
  });

  noTap = function(){
    couldBeTap = false;
  };
  // TODO: Listen to the original target. http://youtu.be/DujfpXOKUp8?t=13m8s
  this.on('touchleave', noTap);
  this.on('touchcancel', noTap);

  // When the touch ends, measure how long it took and trigger the appropriate
  // event
  this.on('touchend', function(event) {
    firstTouch = null;
    // Proceed only if the touchmove/leave/cancel event didn't happen
    if (couldBeTap === true) {
      // Measure how long the touch lasted
      touchTime = new Date().getTime() - touchStart;
      // Make sure the touch was less than the threshold to be considered a tap
      if (touchTime < touchTimeThreshold) {
        event.preventDefault(); // Don't let browser turn this into a click
        this.trigger('tap');
        // It may be good to copy the touchend event object and change the
        // type to tap, if the other event properties aren't exact after
        // vjs.fixEvent runs (e.g. event.target)
      }
    }
  });
};

/**
 * Report user touch activity when touch events occur
 *
 * User activity is used to determine when controls should show/hide. It's
 * relatively simple when it comes to mouse events, because any mouse event
 * should show the controls. So we capture mouse events that bubble up to the
 * player and report activity when that happens.
 *
 * With touch events it isn't as easy. We can't rely on touch events at the
 * player level, because a tap (touchstart + touchend) on the video itself on
 * mobile devices is meant to turn controls off (and on). User activity is
 * checked asynchronously, so what could happen is a tap event on the video
 * turns the controls off, then the touchend event bubbles up to the player,
 * which if it reported user activity, would turn the controls right back on.
 * (We also don't want to completely block touch events from bubbling up)
 *
 * Also a touchmove, touch+hold, and anything other than a tap is not supposed
 * to turn the controls back on on a mobile device.
 *
 * Here we're setting the default component behavior to report user activity
 * whenever touch events happen, and this can be turned off by components that
 * want touch events to act differently.
 */
vjs.Component.prototype.enableTouchActivity = function() {
  var report, touchHolding, touchEnd;

  // Don't continue if the root player doesn't support reporting user activity
  if (!this.player().reportUserActivity) {
    return;
  }

  // listener for reporting that the user is active
  report = vjs.bind(this.player(), this.player().reportUserActivity);

  this.on('touchstart', function() {
    report();
    // For as long as the they are touching the device or have their mouse down,
    // we consider them active even if they're not moving their finger or mouse.
    // So we want to continue to update that they are active
    this.clearInterval(touchHolding);
    // report at the same interval as activityCheck
    touchHolding = this.setInterval(report, 250);
  });

  touchEnd = function(event) {
    report();
    // stop the interval that maintains activity if the touch is holding
    this.clearInterval(touchHolding);
  };

  this.on('touchmove', report);
  this.on('touchend', touchEnd);
  this.on('touchcancel', touchEnd);
};

/**
 * Creates timeout and sets up disposal automatically.
 * @param {Function} fn The function to run after the timeout.
 * @param {Number} timeout Number of ms to delay before executing specified function.
 * @return {Number} Returns the timeout ID
 */
vjs.Component.prototype.setTimeout = function(fn, timeout) {
  fn = vjs.bind(this, fn);

  // window.setTimeout would be preferable here, but due to some bizarre issue with Sinon and/or Phantomjs, we can't.
  var timeoutId = setTimeout(fn, timeout);

  var disposeFn = function() {
    this.clearTimeout(timeoutId);
  };

  disposeFn.guid = 'vjs-timeout-'+ timeoutId;

  this.on('dispose', disposeFn);

  return timeoutId;
};


/**
 * Clears a timeout and removes the associated dispose listener
 * @param {Number} timeoutId The id of the timeout to clear
 * @return {Number} Returns the timeout ID
 */
vjs.Component.prototype.clearTimeout = function(timeoutId) {
  clearTimeout(timeoutId);

  var disposeFn = function(){};
  disposeFn.guid = 'vjs-timeout-'+ timeoutId;

  this.off('dispose', disposeFn);

  return timeoutId;
};

/**
 * Creates an interval and sets up disposal automatically.
 * @param {Function} fn The function to run every N seconds.
 * @param {Number} interval Number of ms to delay before executing specified function.
 * @return {Number} Returns the interval ID
 */
vjs.Component.prototype.setInterval = function(fn, interval) {
  fn = vjs.bind(this, fn);

  var intervalId = setInterval(fn, interval);

  var disposeFn = function() {
    this.clearInterval(intervalId);
  };

  disposeFn.guid = 'vjs-interval-'+ intervalId;

  this.on('dispose', disposeFn);

  return intervalId;
};

/**
 * Clears an interval and removes the associated dispose listener
 * @param {Number} intervalId The id of the interval to clear
 * @return {Number} Returns the interval ID
 */
vjs.Component.prototype.clearInterval = function(intervalId) {
  clearInterval(intervalId);

  var disposeFn = function(){};
  disposeFn.guid = 'vjs-interval-'+ intervalId;

  this.off('dispose', disposeFn);

  return intervalId;
};
/* Button - Base class for all buttons
================================================================================ */
/**
 * Base class for all buttons
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @constructor
 */
vjs.Button = vjs.Component.extend({
  /**
   * @constructor
   * @inheritDoc
   */
  init: function(player, options){
    vjs.Component.call(this, player, options);

    this.emitTapEvents();

    this.on('tap', this.onClick);
    this.on('click', this.onClick);
    this.on('focus', this.onFocus);
    this.on('blur', this.onBlur);
  }
});

vjs.Button.prototype.createEl = function(type, props){
  var el;

  // Add standard Aria and Tabindex info
  props = vjs.obj.merge({
    className: this.buildCSSClass(),
    'role': 'button',
    'aria-live': 'polite', // let the screen reader user know that the text of the button may change
    tabIndex: 0
  }, props);

  el = vjs.Component.prototype.createEl.call(this, type, props);

  // if innerHTML hasn't been overridden (bigPlayButton), add content elements
  if (!props.innerHTML) {
    this.contentEl_ = vjs.createEl('div', {
      className: 'vjs-control-content'
    });

    this.controlText_ = vjs.createEl('span', {
      className: 'vjs-control-text',
      innerHTML: this.localize(this.buttonText) || 'Need Text'
    });

    this.contentEl_.appendChild(this.controlText_);
    el.appendChild(this.contentEl_);
  }

  return el;
};

vjs.Button.prototype.buildCSSClass = function(){
  // TODO: Change vjs-control to vjs-button?
  return 'vjs-control ' + vjs.Component.prototype.buildCSSClass.call(this);
};

  // Click - Override with specific functionality for button
vjs.Button.prototype.onClick = function(){};

  // Focus - Add keyboard functionality to element
vjs.Button.prototype.onFocus = function(){
  vjs.on(document, 'keydown', vjs.bind(this, this.onKeyPress));
};

  // KeyPress (document level) - Trigger click when keys are pressed
vjs.Button.prototype.onKeyPress = function(event){
  // Check for space bar (32) or enter (13) keys
  if (event.which == 32 || event.which == 13) {
    event.preventDefault();
    this.onClick();
  }
};

// Blur - Remove keyboard triggers
vjs.Button.prototype.onBlur = function(){
  vjs.off(document, 'keydown', vjs.bind(this, this.onKeyPress));
};
/* Slider
================================================================================ */
/**
 * The base functionality for sliders like the volume bar and seek bar
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.Slider = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);

    // Set property names to bar and handle to match with the child Slider class is looking for
    this.bar = this.getChild(this.options_['barName']);
    this.handle = this.getChild(this.options_['handleName']);

    this.on('mousedown', this.onMouseDown);
    this.on('touchstart', this.onMouseDown);
    this.on('focus', this.onFocus);
    this.on('blur', this.onBlur);
    this.on('click', this.onClick);

    this.on(player, 'controlsvisible', this.update);
    this.on(player, this.playerEvent, this.update);
  }
});

vjs.Slider.prototype.createEl = function(type, props) {
  props = props || {};
  // Add the slider element class to all sub classes
  props.className = props.className + ' vjs-slider';
  props = vjs.obj.merge({
    'role': 'slider',
    'aria-valuenow': 0,
    'aria-valuemin': 0,
    'aria-valuemax': 100,
    tabIndex: 0
  }, props);

  return vjs.Component.prototype.createEl.call(this, type, props);
};

vjs.Slider.prototype.onMouseDown = function(event){
  event.preventDefault();
  vjs.blockTextSelection();
  this.addClass('vjs-sliding');

  this.on(document, 'mousemove', this.onMouseMove);
  this.on(document, 'mouseup', this.onMouseUp);
  this.on(document, 'touchmove', this.onMouseMove);
  this.on(document, 'touchend', this.onMouseUp);

  this.onMouseMove(event);
};

// To be overridden by a subclass
vjs.Slider.prototype.onMouseMove = function(){};

vjs.Slider.prototype.onMouseUp = function() {
  vjs.unblockTextSelection();
  this.removeClass('vjs-sliding');

  this.off(document, 'mousemove', this.onMouseMove);
  this.off(document, 'mouseup', this.onMouseUp);
  this.off(document, 'touchmove', this.onMouseMove);
  this.off(document, 'touchend', this.onMouseUp);

  this.update();
};

vjs.Slider.prototype.update = function(){
  // In VolumeBar init we have a setTimeout for update that pops and update to the end of the
  // execution stack. The player is destroyed before then update will cause an error
  if (!this.el_) return;

  // If scrubbing, we could use a cached value to make the handle keep up with the user's mouse.
  // On HTML5 browsers scrubbing is really smooth, but some flash players are slow, so we might want to utilize this later.
  // var progress =  (this.player_.scrubbing) ? this.player_.getCache().currentTime / this.player_.duration() : this.player_.currentTime() / this.player_.duration();

  var barProgress,
      progress = this.getPercent(),
      handle = this.handle,
      bar = this.bar;

  // Protect against no duration and other division issues
  if (typeof progress !== 'number' ||
      progress !== progress ||
      progress < 0 ||
      progress === Infinity) {
        progress = 0;
  }

  barProgress = progress;

  // If there is a handle, we need to account for the handle in our calculation for progress bar
  // so that it doesn't fall short of or extend past the handle.
  if (handle) {

    var box = this.el_,
        boxWidth = box.offsetWidth,

        handleWidth = handle.el().offsetWidth,

        // The width of the handle in percent of the containing box
        // In IE, widths may not be ready yet causing NaN
        handlePercent = (handleWidth) ? handleWidth / boxWidth : 0,

        // Get the adjusted size of the box, considering that the handle's center never touches the left or right side.
        // There is a margin of half the handle's width on both sides.
        boxAdjustedPercent = 1 - handlePercent,

        // Adjust the progress that we'll use to set widths to the new adjusted box width
        adjustedProgress = progress * boxAdjustedPercent;

    // The bar does reach the left side, so we need to account for this in the bar's width
    barProgress = adjustedProgress + (handlePercent / 2);

    // Move the handle from the left based on the adjected progress
    handle.el().style.left = vjs.round(adjustedProgress * 100, 2) + '%';
  }

  // Set the new bar width
  if (bar) {
    bar.el().style.width = vjs.round(barProgress * 100, 2) + '%';
  }
};

vjs.Slider.prototype.calculateDistance = function(event){
  var el, box, boxX, boxY, boxW, boxH, handle, pageX, pageY;

  el = this.el_;
  box = vjs.findPosition(el);
  boxW = boxH = el.offsetWidth;
  handle = this.handle;

  if (this.options()['vertical']) {
    boxY = box.top;

    if (event.changedTouches) {
      pageY = event.changedTouches[0].pageY;
    } else {
      pageY = event.pageY;
    }

    if (handle) {
      var handleH = handle.el().offsetHeight;
      // Adjusted X and Width, so handle doesn't go outside the bar
      boxY = boxY + (handleH / 2);
      boxH = boxH - handleH;
    }

    // Percent that the click is through the adjusted area
    return Math.max(0, Math.min(1, ((boxY - pageY) + boxH) / boxH));

  } else {
    boxX = box.left;

    if (event.changedTouches) {
      pageX = event.changedTouches[0].pageX;
    } else {
      pageX = event.pageX;
    }

    if (handle) {
      var handleW = handle.el().offsetWidth;

      // Adjusted X and Width, so handle doesn't go outside the bar
      boxX = boxX + (handleW / 2);
      boxW = boxW - handleW;
    }

    // Percent that the click is through the adjusted area
    return Math.max(0, Math.min(1, (pageX - boxX) / boxW));
  }
};

vjs.Slider.prototype.onFocus = function(){
  this.on(document, 'keydown', this.onKeyPress);
};

vjs.Slider.prototype.onKeyPress = function(event){
  if (event.which == 37 || event.which == 40) { // Left and Down Arrows
    event.preventDefault();
    this.stepBack();
  } else if (event.which == 38 || event.which == 39) { // Up and Right Arrows
    event.preventDefault();
    this.stepForward();
  }
};

vjs.Slider.prototype.onBlur = function(){
  this.off(document, 'keydown', this.onKeyPress);
};

/**
 * Listener for click events on slider, used to prevent clicks
 *   from bubbling up to parent elements like button menus.
 * @param  {Object} event Event object
 */
vjs.Slider.prototype.onClick = function(event){
  event.stopImmediatePropagation();
  event.preventDefault();
};

/**
 * SeekBar Behavior includes play progress bar, and seek handle
 * Needed so it can determine seek position based on handle position/size
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.SliderHandle = vjs.Component.extend();

/**
 * Default value of the slider
 *
 * @type {Number}
 * @private
 */
vjs.SliderHandle.prototype.defaultValue = 0;

/** @inheritDoc */
vjs.SliderHandle.prototype.createEl = function(type, props) {
  props = props || {};
  // Add the slider element class to all sub classes
  props.className = props.className + ' vjs-slider-handle';
  props = vjs.obj.merge({
    innerHTML: '<span class="vjs-control-text">'+this.defaultValue+'</span>'
  }, props);

  return vjs.Component.prototype.createEl.call(this, 'div', props);
};
/* Menu
================================================================================ */
/**
 * The Menu component is used to build pop up menus, including subtitle and
 * captions selection menus.
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @constructor
 */
vjs.Menu = vjs.Component.extend();

/**
 * Add a menu item to the menu
 * @param {Object|String} component Component or component type to add
 */
vjs.Menu.prototype.addItem = function(component){
  this.addChild(component);
  component.on('click', vjs.bind(this, function(){
    this.unlockShowing();
  }));
};

/** @inheritDoc */
vjs.Menu.prototype.createEl = function(){
  var contentElType = this.options().contentElType || 'ul';
  this.contentEl_ = vjs.createEl(contentElType, {
    className: 'vjs-menu-content'
  });
  var el = vjs.Component.prototype.createEl.call(this, 'div', {
    append: this.contentEl_,
    className: 'vjs-menu'
  });
  el.appendChild(this.contentEl_);

  // Prevent clicks from bubbling up. Needed for Menu Buttons,
  // where a click on the parent is significant
  vjs.on(el, 'click', function(event){
    event.preventDefault();
    event.stopImmediatePropagation();
  });

  return el;
};

/**
 * The component for a menu item. `<li>`
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @constructor
 */
vjs.MenuItem = vjs.Button.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Button.call(this, player, options);
    this.selected(options['selected']);
  }
});

/** @inheritDoc */
vjs.MenuItem.prototype.createEl = function(type, props){
  return vjs.Button.prototype.createEl.call(this, 'li', vjs.obj.merge({
    className: 'vjs-menu-item',
    innerHTML: this.localize(this.options_['label'])
  }, props));
};

/**
 * Handle a click on the menu item, and set it to selected
 */
vjs.MenuItem.prototype.onClick = function(){
  this.selected(true);
};

/**
 * Set this menu item as selected or not
 * @param  {Boolean} selected
 */
vjs.MenuItem.prototype.selected = function(selected){
  if (selected) {
    this.addClass('vjs-selected');
    this.el_.setAttribute('aria-selected',true);
  } else {
    this.removeClass('vjs-selected');
    this.el_.setAttribute('aria-selected',false);
  }
};


/**
 * A button class with a popup menu
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.MenuButton = vjs.Button.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Button.call(this, player, options);

    this.update();

    this.on('keydown', this.onKeyPress);
    this.el_.setAttribute('aria-haspopup', true);
    this.el_.setAttribute('role', 'button');
  }
});

vjs.MenuButton.prototype.update = function() {
  var menu = this.createMenu();

  if (this.menu) {
    this.removeChild(this.menu);
  }

  this.menu = menu;
  this.addChild(menu);

  if (this.items && this.items.length === 0) {
    this.hide();
  } else if (this.items && this.items.length > 1) {
    this.show();
  }
};

/**
 * Track the state of the menu button
 * @type {Boolean}
 * @private
 */
vjs.MenuButton.prototype.buttonPressed_ = false;

vjs.MenuButton.prototype.createMenu = function(){
  var menu = new vjs.Menu(this.player_);

  // Add a title list item to the top
  if (this.options().title) {
    menu.contentEl().appendChild(vjs.createEl('li', {
      className: 'vjs-menu-title',
      innerHTML: vjs.capitalize(this.options().title),
      tabindex: -1
    }));
  }

  this.items = this['createItems']();

  if (this.items) {
    // Add menu items to the menu
    for (var i = 0; i < this.items.length; i++) {
      menu.addItem(this.items[i]);
    }
  }

  return menu;
};

/**
 * Create the list of menu items. Specific to each subclass.
 */
vjs.MenuButton.prototype.createItems = function(){};

/** @inheritDoc */
vjs.MenuButton.prototype.buildCSSClass = function(){
  return this.className + ' vjs-menu-button ' + vjs.Button.prototype.buildCSSClass.call(this);
};

// Focus - Add keyboard functionality to element
// This function is not needed anymore. Instead, the keyboard functionality is handled by
// treating the button as triggering a submenu. When the button is pressed, the submenu
// appears. Pressing the button again makes the submenu disappear.
vjs.MenuButton.prototype.onFocus = function(){};
// Can't turn off list display that we turned on with focus, because list would go away.
vjs.MenuButton.prototype.onBlur = function(){};

vjs.MenuButton.prototype.onClick = function(){
  // When you click the button it adds focus, which will show the menu indefinitely.
  // So we'll remove focus when the mouse leaves the button.
  // Focus is needed for tab navigation.
  this.one('mouseout', vjs.bind(this, function(){
    this.menu.unlockShowing();
    this.el_.blur();
  }));
  if (this.buttonPressed_){
    this.unpressButton();
  } else {
    this.pressButton();
  }
};

vjs.MenuButton.prototype.onKeyPress = function(event){

  // Check for space bar (32) or enter (13) keys
  if (event.which == 32 || event.which == 13) {
    if (this.buttonPressed_){
      this.unpressButton();
    } else {
      this.pressButton();
    }
    event.preventDefault();
  // Check for escape (27) key
  } else if (event.which == 27){
    if (this.buttonPressed_){
      this.unpressButton();
    }
    event.preventDefault();
  }
};

vjs.MenuButton.prototype.pressButton = function(){
  this.buttonPressed_ = true;
  this.menu.lockShowing();
  this.el_.setAttribute('aria-pressed', true);
  if (this.items && this.items.length > 0) {
    this.items[0].el().focus(); // set the focus to the title of the submenu
  }
};

vjs.MenuButton.prototype.unpressButton = function(){
  this.buttonPressed_ = false;
  this.menu.unlockShowing();
  this.el_.setAttribute('aria-pressed', false);
};
/**
 * Custom MediaError to mimic the HTML5 MediaError
 * @param {Number} code The media error code
 */
vjs.MediaError = function(code){
  if (typeof code === 'number') {
    this.code = code;
  } else if (typeof code === 'string') {
    // default code is zero, so this is a custom error
    this.message = code;
  } else if (typeof code === 'object') { // object
    vjs.obj.merge(this, code);
  }

  if (!this.message) {
    this.message = vjs.MediaError.defaultMessages[this.code] || '';
  }
};

/**
 * The error code that refers two one of the defined
 * MediaError types
 * @type {Number}
 */
vjs.MediaError.prototype.code = 0;

/**
 * An optional message to be shown with the error.
 * Message is not part of the HTML5 video spec
 * but allows for more informative custom errors.
 * @type {String}
 */
vjs.MediaError.prototype.message = '';

/**
 * An optional status code that can be set by plugins
 * to allow even more detail about the error.
 * For example the HLS plugin might provide the specific
 * HTTP status code that was returned when the error
 * occurred, then allowing a custom error overlay
 * to display more information.
 * @type {[type]}
 */
vjs.MediaError.prototype.status = null;

vjs.MediaError.errorTypes = [
  'MEDIA_ERR_CUSTOM',            // = 0
  'MEDIA_ERR_ABORTED',           // = 1
  'MEDIA_ERR_NETWORK',           // = 2
  'MEDIA_ERR_DECODE',            // = 3
  'MEDIA_ERR_SRC_NOT_SUPPORTED', // = 4
  'MEDIA_ERR_ENCRYPTED'          // = 5
];

vjs.MediaError.defaultMessages = {
  1: 'You aborted the video playback',
  2: 'A network error caused the video download to fail part-way.',
  3: 'The video playback was aborted due to a corruption problem or because the video used features your browser did not support.',
  4: 'The video could not be loaded, either because the server or network failed or because the format is not supported.',
  5: 'The video is encrypted and we do not have the keys to decrypt it.'
};

// Add types as properties on MediaError
// e.g. MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED = 4;
for (var errNum = 0; errNum < vjs.MediaError.errorTypes.length; errNum++) {
  vjs.MediaError[vjs.MediaError.errorTypes[errNum]] = errNum;
  // values should be accessible on both the class and instance
  vjs.MediaError.prototype[vjs.MediaError.errorTypes[errNum]] = errNum;
}
(function(){
  var apiMap, specApi, browserApi, i;

  /**
   * Store the browser-specific methods for the fullscreen API
   * @type {Object|undefined}
   * @private
   */
  vjs.browser.fullscreenAPI;

  // browser API methods
  // map approach from Screenful.js - https://github.com/sindresorhus/screenfull.js
  apiMap = [
    // Spec: https://dvcs.w3.org/hg/fullscreen/raw-file/tip/Overview.html
    [
      'requestFullscreen',
      'exitFullscreen',
      'fullscreenElement',
      'fullscreenEnabled',
      'fullscreenchange',
      'fullscreenerror'
    ],
    // WebKit
    [
      'webkitRequestFullscreen',
      'webkitExitFullscreen',
      'webkitFullscreenElement',
      'webkitFullscreenEnabled',
      'webkitfullscreenchange',
      'webkitfullscreenerror'
    ],
    // Old WebKit (Safari 5.1)
    [
      'webkitRequestFullScreen',
      'webkitCancelFullScreen',
      'webkitCurrentFullScreenElement',
      'webkitCancelFullScreen',
      'webkitfullscreenchange',
      'webkitfullscreenerror'
    ],
    // Mozilla
    [
      'mozRequestFullScreen',
      'mozCancelFullScreen',
      'mozFullScreenElement',
      'mozFullScreenEnabled',
      'mozfullscreenchange',
      'mozfullscreenerror'
    ],
    // Microsoft
    [
      'msRequestFullscreen',
      'msExitFullscreen',
      'msFullscreenElement',
      'msFullscreenEnabled',
      'MSFullscreenChange',
      'MSFullscreenError'
    ]
  ];

  specApi = apiMap[0];

  // determine the supported set of functions
  for (i=0; i<apiMap.length; i++) {
    // check for exitFullscreen function
    if (apiMap[i][1] in document) {
      browserApi = apiMap[i];
      break;
    }
  }

  // map the browser API names to the spec API names
  // or leave vjs.browser.fullscreenAPI undefined
  if (browserApi) {
    vjs.browser.fullscreenAPI = {};

    for (i=0; i<browserApi.length; i++) {
      vjs.browser.fullscreenAPI[specApi[i]] = browserApi[i];
    }
  }

})();
/**
 * An instance of the `vjs.Player` class is created when any of the Video.js setup methods are used to initialize a video.
 *
 * ```js
 * var myPlayer = videojs('example_video_1');
 * ```
 *
 * In the following example, the `data-setup` attribute tells the Video.js library to create a player instance when the library is ready.
 *
 * ```html
 * <video id="example_video_1" data-setup='{}' controls>
 *   <source src="my-source.mp4" type="video/mp4">
 * </video>
 * ```
 *
 * After an instance has been created it can be accessed globally using `Video('example_video_1')`.
 *
 * @class
 * @extends vjs.Component
 */
vjs.Player = vjs.Component.extend({

  /**
   * player's constructor function
   *
   * @constructs
   * @method init
   * @param {Element} tag        The original video tag used for configuring options
   * @param {Object=} options    Player options
   * @param {Function=} ready    Ready callback function
   */
  init: function(tag, options, ready){
    this.tag = tag; // Store the original tag used to set options

    // Make sure tag ID exists
    tag.id = tag.id || 'vjs_video_' + vjs.guid++;

    // Store the tag attributes used to restore html5 element
    this.tagAttributes = tag && vjs.getElementAttributes(tag);

    // Set Options
    // The options argument overrides options set in the video tag
    // which overrides globally set options.
    // This latter part coincides with the load order
    // (tag must exist before Player)
    options = vjs.obj.merge(this.getTagSettings(tag), options);

    // Update Current Language
    this.language_ = options['language'] || vjs.options['language'];

    // Update Supported Languages
    this.languages_ = options['languages'] || vjs.options['languages'];

    // Cache for video property values.
    this.cache_ = {};

    // Set poster
    this.poster_ = options['poster'] || '';

    // Set controls
    this.controls_ = !!options['controls'];
    // Original tag settings stored in options
    // now remove immediately so native controls don't flash.
    // May be turned back on by HTML5 tech if nativeControlsForTouch is true
    tag.controls = false;

    // we don't want the player to report touch activity on itself
    // see enableTouchActivity in Component
    options.reportTouchActivity = false;

    // Set isAudio based on whether or not an audio tag was used
    this.isAudio(this.tag.nodeName.toLowerCase() === 'audio');

    // Run base component initializing with new options.
    // Builds the element through createEl()
    // Inits and embeds any child components in opts
    vjs.Component.call(this, this, options, ready);

    // Update controls className. Can't do this when the controls are initially
    // set because the element doesn't exist yet.
    if (this.controls()) {
      this.addClass('vjs-controls-enabled');
    } else {
      this.addClass('vjs-controls-disabled');
    }

    if (this.isAudio()) {
      this.addClass('vjs-audio');
    }

    // TODO: Make this smarter. Toggle user state between touching/mousing
    // using events, since devices can have both touch and mouse events.
    // if (vjs.TOUCH_ENABLED) {
    //   this.addClass('vjs-touch-enabled');
    // }

    // Make player easily findable by ID
    vjs.players[this.id_] = this;

    if (options['plugins']) {
      vjs.obj.each(options['plugins'], function(key, val){
        this[key](val);
      }, this);
    }

    this.listenForUserActivity();
  }
});

/**
 * The player's stored language code
 *
 * @type {String}
 * @private
 */
vjs.Player.prototype.language_;

/**
 * The player's language code
 * @param  {String} languageCode  The locale string
 * @return {String}             The locale string when getting
 * @return {vjs.Player}         self, when setting
 */
vjs.Player.prototype.language = function (languageCode) {
  if (languageCode === undefined) {
    return this.language_;
  }

  this.language_ = languageCode;
  return this;
};

/**
 * The player's stored language dictionary
 *
 * @type {Object}
 * @private
 */
vjs.Player.prototype.languages_;

vjs.Player.prototype.languages = function(){
  return this.languages_;
};

/**
 * Player instance options, surfaced using vjs.options
 * vjs.options = vjs.Player.prototype.options_
 * Make changes in vjs.options, not here.
 * All options should use string keys so they avoid
 * renaming by closure compiler
 * @type {Object}
 * @private
 */
vjs.Player.prototype.options_ = vjs.options;

/**
 * Destroys the video player and does any necessary cleanup
 *
 *     myPlayer.dispose();
 *
 * This is especially helpful if you are dynamically adding and removing videos
 * to/from the DOM.
 */
vjs.Player.prototype.dispose = function(){
  this.trigger('dispose');
  // prevent dispose from being called twice
  this.off('dispose');

  // Kill reference to this player
  vjs.players[this.id_] = null;
  if (this.tag && this.tag['player']) { this.tag['player'] = null; }
  if (this.el_ && this.el_['player']) { this.el_['player'] = null; }

  if (this.tech) { this.tech.dispose(); }

  // Component dispose
  vjs.Component.prototype.dispose.call(this);
};

vjs.Player.prototype.getTagSettings = function(tag){
  var tagOptions,
      dataSetup,
      options = {
        'sources': [],
        'tracks': []
      };

  tagOptions = vjs.getElementAttributes(tag);
  dataSetup = tagOptions['data-setup'];

  // Check if data-setup attr exists.
  if (dataSetup !== null){
    // Parse options JSON
    // If empty string, make it a parsable json object.
    vjs.obj.merge(tagOptions, vjs.JSON.parse(dataSetup || '{}'));
  }

  vjs.obj.merge(options, tagOptions);

  // Get tag children settings
  if (tag.hasChildNodes()) {
    var children, child, childName, i, j;

    children = tag.childNodes;

    for (i=0,j=children.length; i<j; i++) {
      child = children[i];
      // Change case needed: http://ejohn.org/blog/nodename-case-sensitivity/
      childName = child.nodeName.toLowerCase();
      if (childName === 'source') {
        options['sources'].push(vjs.getElementAttributes(child));
      } else if (childName === 'track') {
        options['tracks'].push(vjs.getElementAttributes(child));
      }
    }
  }

  return options;
};

vjs.Player.prototype.createEl = function(){
  var
    el = this.el_ = vjs.Component.prototype.createEl.call(this, 'div'),
    tag = this.tag,
    attrs;

  // Remove width/height attrs from tag so CSS can make it 100% width/height
  tag.removeAttribute('width');
  tag.removeAttribute('height');

  // Copy over all the attributes from the tag, including ID and class
  // ID will now reference player box, not the video tag
  attrs = vjs.getElementAttributes(tag);
  vjs.obj.each(attrs, function(attr) {
    // workaround so we don't totally break IE7
    // http://stackoverflow.com/questions/3653444/css-styles-not-applied-on-dynamic-elements-in-internet-explorer-7
    if (attr == 'class') {
      el.className = attrs[attr];
    } else {
      el.setAttribute(attr, attrs[attr]);
    }
  });

  // Update tag id/class for use as HTML5 playback tech
  // Might think we should do this after embedding in container so .vjs-tech class
  // doesn't flash 100% width/height, but class only applies with .video-js parent
  tag.id += '_html5_api';
  tag.className = 'vjs-tech';

  // Make player findable on elements
  tag['player'] = el['player'] = this;
  // Default state of video is paused
  this.addClass('vjs-paused');

  // Make box use width/height of tag, or rely on default implementation
  // Enforce with CSS since width/height attrs don't work on divs
  this.width(this.options_['width'], true); // (true) Skip resize listener on load
  this.height(this.options_['height'], true);

  // vjs.insertFirst seems to cause the networkState to flicker from 3 to 2, so
  // keep track of the original for later so we can know if the source originally failed
  tag.initNetworkState_ = tag.networkState;

  // Wrap video tag in div (el/box) container
  if (tag.parentNode) {
    tag.parentNode.insertBefore(el, tag);
  }
  vjs.insertFirst(tag, el); // Breaks iPhone, fixed in HTML5 setup.

  // The event listeners need to be added before the children are added
  // in the component init because the tech (loaded with mediaLoader) may
  // fire events, like loadstart, that these events need to capture.
  // Long term it might be better to expose a way to do this in component.init
  // like component.initEventListeners() that runs between el creation and
  // adding children
  this.el_ = el;
  this.on('loadstart', this.onLoadStart);
  this.on('waiting', this.onWaiting);
  this.on(['canplay', 'canplaythrough', 'playing', 'ended'], this.onWaitEnd);
  this.on('seeking', this.onSeeking);
  this.on('seeked', this.onSeeked);
  this.on('ended', this.onEnded);
  this.on('play', this.onPlay);
  this.on('firstplay', this.onFirstPlay);
  this.on('pause', this.onPause);
  this.on('progress', this.onProgress);
  this.on('durationchange', this.onDurationChange);
  this.on('fullscreenchange', this.onFullscreenChange);

  return el;
};

// /* Media Technology (tech)
// ================================================================================ */
// Load/Create an instance of playback technology including element and API methods
// And append playback element in player div.
vjs.Player.prototype.loadTech = function(techName, source){

  // Pause and remove current playback technology
  if (this.tech) {
    this.unloadTech();
  }

  // get rid of the HTML5 video tag as soon as we are using another tech
  if (techName !== 'Html5' && this.tag) {
    vjs.Html5.disposeMediaElement(this.tag);
    this.tag = null;
  }

  this.techName = techName;

  // Turn off API access because we're loading a new tech that might load asynchronously
  this.isReady_ = false;

  var techReady = function(){
    this.player_.triggerReady();
  };

  // Grab tech-specific options from player options and add source and parent element to use.
  var techOptions = vjs.obj.merge({ 'source': source, 'parentEl': this.el_ }, this.options_[techName.toLowerCase()]);

  if (source) {
    this.currentType_ = source.type;
    if (source.src == this.cache_.src && this.cache_.currentTime > 0) {
      techOptions['startTime'] = this.cache_.currentTime;
    }

    this.cache_.src = source.src;
  }

  // Initialize tech instance
  this.tech = new window['videojs'][techName](this, techOptions);

  this.tech.ready(techReady);
};

vjs.Player.prototype.unloadTech = function(){
  this.isReady_ = false;

  this.tech.dispose();

  this.tech = false;
};

// There's many issues around changing the size of a Flash (or other plugin) object.
// First is a plugin reload issue in Firefox that has been around for 11 years: https://bugzilla.mozilla.org/show_bug.cgi?id=90268
// Then with the new fullscreen API, Mozilla and webkit browsers will reload the flash object after going to fullscreen.
// To get around this, we're unloading the tech, caching source and currentTime values, and reloading the tech once the plugin is resized.
// reloadTech: function(betweenFn){
//   vjs.log('unloadingTech')
//   this.unloadTech();
//   vjs.log('unloadedTech')
//   if (betweenFn) { betweenFn.call(); }
//   vjs.log('LoadingTech')
//   this.loadTech(this.techName, { src: this.cache_.src })
//   vjs.log('loadedTech')
// },

// /* Player event handlers (how the player reacts to certain events)
// ================================================================================ */

/**
 * Fired when the user agent begins looking for media data
 * @event loadstart
 */
vjs.Player.prototype.onLoadStart = function() {
  // TODO: Update to use `emptied` event instead. See #1277.

  this.removeClass('vjs-ended');

  // reset the error state
  this.error(null);

  // If it's already playing we want to trigger a firstplay event now.
  // The firstplay event relies on both the play and loadstart events
  // which can happen in any order for a new source
  if (!this.paused()) {
    this.trigger('firstplay');
  } else {
    // reset the hasStarted state
    this.hasStarted(false);
  }
};

vjs.Player.prototype.hasStarted_ = false;

vjs.Player.prototype.hasStarted = function(hasStarted){
  if (hasStarted !== undefined) {
    // only update if this is a new value
    if (this.hasStarted_ !== hasStarted) {
      this.hasStarted_ = hasStarted;
      if (hasStarted) {
        this.addClass('vjs-has-started');
        // trigger the firstplay event if this newly has played
        this.trigger('firstplay');
      } else {
        this.removeClass('vjs-has-started');
      }
    }
    return this;
  }
  return this.hasStarted_;
};

/**
 * Fired when the player has initial duration and dimension information
 * @event loadedmetadata
 */
vjs.Player.prototype.onLoadedMetaData;

/**
 * Fired when the player has downloaded data at the current playback position
 * @event loadeddata
 */
vjs.Player.prototype.onLoadedData;

/**
 * Fired when the player has finished downloading the source data
 * @event loadedalldata
 */
vjs.Player.prototype.onLoadedAllData;

/**
 * Fired whenever the media begins or resumes playback
 * @event play
 */
vjs.Player.prototype.onPlay = function(){
  this.removeClass('vjs-ended');
  this.removeClass('vjs-paused');
  this.addClass('vjs-playing');

  // hide the poster when the user hits play
  // https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-play
  this.hasStarted(true);
};

/**
 * Fired whenever the media begins waiting
 * @event waiting
 */
vjs.Player.prototype.onWaiting = function(){
  this.addClass('vjs-waiting');
};

/**
 * A handler for events that signal that waiting has ended
 * which is not consistent between browsers. See #1351
 * @private
 */
vjs.Player.prototype.onWaitEnd = function(){
  this.removeClass('vjs-waiting');
};

/**
 * Fired whenever the player is jumping to a new time
 * @event seeking
 */
vjs.Player.prototype.onSeeking = function(){
  this.addClass('vjs-seeking');
};

/**
 * Fired when the player has finished jumping to a new time
 * @event seeked
 */
vjs.Player.prototype.onSeeked = function(){
  this.removeClass('vjs-seeking');
};

/**
 * Fired the first time a video is played
 *
 * Not part of the HLS spec, and we're not sure if this is the best
 * implementation yet, so use sparingly. If you don't have a reason to
 * prevent playback, use `myPlayer.one('play');` instead.
 *
 * @event firstplay
 */
vjs.Player.prototype.onFirstPlay = function(){
    //If the first starttime attribute is specified
    //then we will start at the given offset in seconds
    if(this.options_['starttime']){
      this.currentTime(this.options_['starttime']);
    }

    this.addClass('vjs-has-started');
};

/**
 * Fired whenever the media has been paused
 * @event pause
 */
vjs.Player.prototype.onPause = function(){
  this.removeClass('vjs-playing');
  this.addClass('vjs-paused');
};

/**
 * Fired when the current playback position has changed
 *
 * During playback this is fired every 15-250 milliseconds, depending on the
 * playback technology in use.
 * @event timeupdate
 */
vjs.Player.prototype.onTimeUpdate;

/**
 * Fired while the user agent is downloading media data
 * @event progress
 */
vjs.Player.prototype.onProgress = function(){
  // Add custom event for when source is finished downloading.
  if (this.bufferedPercent() == 1) {
    this.trigger('loadedalldata');
  }
};

/**
 * Fired when the end of the media resource is reached (currentTime == duration)
 * @event ended
 */
vjs.Player.prototype.onEnded = function(){
  this.addClass('vjs-ended');
  if (this.options_['loop']) {
    this.currentTime(0);
    this.play();
  } else if (!this.paused()) {
    this.pause();
  }
};

/**
 * Fired when the duration of the media resource is first known or changed
 * @event durationchange
 */
vjs.Player.prototype.onDurationChange = function(){
  // Allows for caching value instead of asking player each time.
  // We need to get the techGet response and check for a value so we don't
  // accidentally cause the stack to blow up.
  var duration = this.techGet('duration');
  if (duration) {
    if (duration < 0) {
      duration = Infinity;
    }
    this.duration(duration);
    // Determine if the stream is live and propagate styles down to UI.
    if (duration === Infinity) {
      this.addClass('vjs-live');
    } else {
      this.removeClass('vjs-live');
    }
  }
};

/**
 * Fired when the volume changes
 * @event volumechange
 */
vjs.Player.prototype.onVolumeChange;

/**
 * Fired when the player switches in or out of fullscreen mode
 * @event fullscreenchange
 */
vjs.Player.prototype.onFullscreenChange = function() {
  if (this.isFullscreen()) {
    this.addClass('vjs-fullscreen');
  } else {
    this.removeClass('vjs-fullscreen');
  }
};

/**
 * Fired when an error occurs
 * @event error
 */
vjs.Player.prototype.onError;

// /* Player API
// ================================================================================ */

/**
 * Object for cached values.
 * @private
 */
vjs.Player.prototype.cache_;

vjs.Player.prototype.getCache = function(){
  return this.cache_;
};

// Pass values to the playback tech
vjs.Player.prototype.techCall = function(method, arg){
  // If it's not ready yet, call method when it is
  if (this.tech && !this.tech.isReady_) {
    this.tech.ready(function(){
      this[method](arg);
    });

  // Otherwise call method now
  } else {
    try {
      this.tech[method](arg);
    } catch(e) {
      vjs.log(e);
      throw e;
    }
  }
};

// Get calls can't wait for the tech, and sometimes don't need to.
vjs.Player.prototype.techGet = function(method){
  if (this.tech && this.tech.isReady_) {

    // Flash likes to die and reload when you hide or reposition it.
    // In these cases the object methods go away and we get errors.
    // When that happens we'll catch the errors and inform tech that it's not ready any more.
    try {
      return this.tech[method]();
    } catch(e) {
      // When building additional tech libs, an expected method may not be defined yet
      if (this.tech[method] === undefined) {
        vjs.log('Video.js: ' + method + ' method not defined for '+this.techName+' playback technology.', e);
      } else {
        // When a method isn't available on the object it throws a TypeError
        if (e.name == 'TypeError') {
          vjs.log('Video.js: ' + method + ' unavailable on '+this.techName+' playback technology element.', e);
          this.tech.isReady_ = false;
        } else {
          vjs.log(e);
        }
      }
      throw e;
    }
  }

  return;
};

/**
 * start media playback
 *
 *     myPlayer.play();
 *
 * @return {vjs.Player} self
 */
vjs.Player.prototype.play = function(){
  this.techCall('play');
  return this;
};

/**
 * Pause the video playback
 *
 *     myPlayer.pause();
 *
 * @return {vjs.Player} self
 */
vjs.Player.prototype.pause = function(){
  this.techCall('pause');
  return this;
};

/**
 * Check if the player is paused
 *
 *     var isPaused = myPlayer.paused();
 *     var isPlaying = !myPlayer.paused();
 *
 * @return {Boolean} false if the media is currently playing, or true otherwise
 */
vjs.Player.prototype.paused = function(){
  // The initial state of paused should be true (in Safari it's actually false)
  return (this.techGet('paused') === false) ? false : true;
};

/**
 * Get or set the current time (in seconds)
 *
 *     // get
 *     var whereYouAt = myPlayer.currentTime();
 *
 *     // set
 *     myPlayer.currentTime(120); // 2 minutes into the video
 *
 * @param  {Number|String=} seconds The time to seek to
 * @return {Number}        The time in seconds, when not setting
 * @return {vjs.Player}    self, when the current time is set
 */
vjs.Player.prototype.currentTime = function(seconds){
  if (seconds !== undefined) {

    this.techCall('setCurrentTime', seconds);

    return this;
  }

  // cache last currentTime and return. default to 0 seconds
  //
  // Caching the currentTime is meant to prevent a massive amount of reads on the tech's
  // currentTime when scrubbing, but may not provide much performance benefit afterall.
  // Should be tested. Also something has to read the actual current time or the cache will
  // never get updated.
  return this.cache_.currentTime = (this.techGet('currentTime') || 0);
};

/**
 * Get the length in time of the video in seconds
 *
 *     var lengthOfVideo = myPlayer.duration();
 *
 * **NOTE**: The video must have started loading before the duration can be
 * known, and in the case of Flash, may not be known until the video starts
 * playing.
 *
 * @return {Number} The duration of the video in seconds
 */
vjs.Player.prototype.duration = function(seconds){
  if (seconds !== undefined) {

    // cache the last set value for optimized scrubbing (esp. Flash)
    this.cache_.duration = parseFloat(seconds);

    return this;
  }

  if (this.cache_.duration === undefined) {
    this.onDurationChange();
  }

  return this.cache_.duration || 0;
};

/**
 * Calculates how much time is left.
 *
 *     var timeLeft = myPlayer.remainingTime();
 *
 * Not a native video element function, but useful
 * @return {Number} The time remaining in seconds
 */
vjs.Player.prototype.remainingTime = function(){
  return this.duration() - this.currentTime();
};

// http://dev.w3.org/html5/spec/video.html#dom-media-buffered
// Buffered returns a timerange object.
// Kind of like an array of portions of the video that have been downloaded.

/**
 * Get a TimeRange object with the times of the video that have been downloaded
 *
 * If you just want the percent of the video that's been downloaded,
 * use bufferedPercent.
 *
 *     // Number of different ranges of time have been buffered. Usually 1.
 *     numberOfRanges = bufferedTimeRange.length,
 *
 *     // Time in seconds when the first range starts. Usually 0.
 *     firstRangeStart = bufferedTimeRange.start(0),
 *
 *     // Time in seconds when the first range ends
 *     firstRangeEnd = bufferedTimeRange.end(0),
 *
 *     // Length in seconds of the first time range
 *     firstRangeLength = firstRangeEnd - firstRangeStart;
 *
 * @return {Object} A mock TimeRange object (following HTML spec)
 */
vjs.Player.prototype.buffered = function(){
  var buffered = this.techGet('buffered');

  if (!buffered || !buffered.length) {
    buffered = vjs.createTimeRange(0,0);
  }

  return buffered;
};

/**
 * Get the percent (as a decimal) of the video that's been downloaded
 *
 *     var howMuchIsDownloaded = myPlayer.bufferedPercent();
 *
 * 0 means none, 1 means all.
 * (This method isn't in the HTML5 spec, but it's very convenient)
 *
 * @return {Number} A decimal between 0 and 1 representing the percent
 */
vjs.Player.prototype.bufferedPercent = function(){
  var duration = this.duration(),
      buffered = this.buffered(),
      bufferedDuration = 0,
      start, end;

  if (!duration) {
    return 0;
  }

  for (var i=0; i<buffered.length; i++){
    start = buffered.start(i);
    end   = buffered.end(i);

    // buffered end can be bigger than duration by a very small fraction
    if (end > duration) {
      end = duration;
    }

    bufferedDuration += end - start;
  }

  return bufferedDuration / duration;
};

/**
 * Get the ending time of the last buffered time range
 *
 * This is used in the progress bar to encapsulate all time ranges.
 * @return {Number} The end of the last buffered time range
 */
vjs.Player.prototype.bufferedEnd = function(){
  var buffered = this.buffered(),
      duration = this.duration(),
      end = buffered.end(buffered.length-1);

  if (end > duration) {
    end = duration;
  }

  return end;
};

/**
 * Get or set the current volume of the media
 *
 *     // get
 *     var howLoudIsIt = myPlayer.volume();
 *
 *     // set
 *     myPlayer.volume(0.5); // Set volume to half
 *
 * 0 is off (muted), 1.0 is all the way up, 0.5 is half way.
 *
 * @param  {Number} percentAsDecimal The new volume as a decimal percent
 * @return {Number}                  The current volume, when getting
 * @return {vjs.Player}              self, when setting
 */
vjs.Player.prototype.volume = function(percentAsDecimal){
  var vol;

  if (percentAsDecimal !== undefined) {
    vol = Math.max(0, Math.min(1, parseFloat(percentAsDecimal))); // Force value to between 0 and 1
    this.cache_.volume = vol;
    this.techCall('setVolume', vol);
    vjs.setLocalStorage('volume', vol);
    return this;
  }

  // Default to 1 when returning current volume.
  vol = parseFloat(this.techGet('volume'));
  return (isNaN(vol)) ? 1 : vol;
};


/**
 * Get the current muted state, or turn mute on or off
 *
 *     // get
 *     var isVolumeMuted = myPlayer.muted();
 *
 *     // set
 *     myPlayer.muted(true); // mute the volume
 *
 * @param  {Boolean=} muted True to mute, false to unmute
 * @return {Boolean} True if mute is on, false if not, when getting
 * @return {vjs.Player} self, when setting mute
 */
vjs.Player.prototype.muted = function(muted){
  if (muted !== undefined) {
    this.techCall('setMuted', muted);
    return this;
  }
  return this.techGet('muted') || false; // Default to false
};

// Check if current tech can support native fullscreen
// (e.g. with built in controls like iOS, so not our flash swf)
vjs.Player.prototype.supportsFullScreen = function(){
  return this.techGet('supportsFullScreen') || false;
};

/**
 * is the player in fullscreen
 * @type {Boolean}
 * @private
 */
vjs.Player.prototype.isFullscreen_ = false;

/**
 * Check if the player is in fullscreen mode
 *
 *     // get
 *     var fullscreenOrNot = myPlayer.isFullscreen();
 *
 *     // set
 *     myPlayer.isFullscreen(true); // tell the player it's in fullscreen
 *
 * NOTE: As of the latest HTML5 spec, isFullscreen is no longer an official
 * property and instead document.fullscreenElement is used. But isFullscreen is
 * still a valuable property for internal player workings.
 *
 * @param  {Boolean=} isFS Update the player's fullscreen state
 * @return {Boolean} true if fullscreen, false if not
 * @return {vjs.Player} self, when setting
 */
vjs.Player.prototype.isFullscreen = function(isFS){
  if (isFS !== undefined) {
    this.isFullscreen_ = !!isFS;
    return this;
  }
  return this.isFullscreen_;
};

/**
 * Old naming for isFullscreen()
 * @deprecated for lowercase 's' version
 */
vjs.Player.prototype.isFullScreen = function(isFS){
  vjs.log.warn('player.isFullScreen() has been deprecated, use player.isFullscreen() with a lowercase "s")');
  return this.isFullscreen(isFS);
};

/**
 * Increase the size of the video to full screen
 *
 *     myPlayer.requestFullscreen();
 *
 * In some browsers, full screen is not supported natively, so it enters
 * "full window mode", where the video fills the browser window.
 * In browsers and devices that support native full screen, sometimes the
 * browser's default controls will be shown, and not the Video.js custom skin.
 * This includes most mobile devices (iOS, Android) and older versions of
 * Safari.
 *
 * @return {vjs.Player} self
 */
vjs.Player.prototype.requestFullscreen = function(){
  var fsApi = vjs.browser.fullscreenAPI;

  this.isFullscreen(true);

  if (fsApi) {
    // the browser supports going fullscreen at the element level so we can
    // take the controls fullscreen as well as the video

    // Trigger fullscreenchange event after change
    // We have to specifically add this each time, and remove
    // when canceling fullscreen. Otherwise if there's multiple
    // players on a page, they would all be reacting to the same fullscreen
    // events
    vjs.on(document, fsApi['fullscreenchange'], vjs.bind(this, function(e){
      this.isFullscreen(document[fsApi.fullscreenElement]);

      // If cancelling fullscreen, remove event listener.
      if (this.isFullscreen() === false) {
        vjs.off(document, fsApi['fullscreenchange'], arguments.callee);
      }

      this.trigger('fullscreenchange');
    }));

    this.el_[fsApi.requestFullscreen]();

  } else if (this.tech.supportsFullScreen()) {
    // we can't take the video.js controls fullscreen but we can go fullscreen
    // with native controls
    this.techCall('enterFullScreen');
  } else {
    // fullscreen isn't supported so we'll just stretch the video element to
    // fill the viewport
    this.enterFullWindow();
    this.trigger('fullscreenchange');
  }

  return this;
};

/**
 * Old naming for requestFullscreen
 * @deprecated for lower case 's' version
 */
vjs.Player.prototype.requestFullScreen = function(){
  vjs.log.warn('player.requestFullScreen() has been deprecated, use player.requestFullscreen() with a lowercase "s")');
  return this.requestFullscreen();
};


/**
 * Return the video to its normal size after having been in full screen mode
 *
 *     myPlayer.exitFullscreen();
 *
 * @return {vjs.Player} self
 */
vjs.Player.prototype.exitFullscreen = function(){
  var fsApi = vjs.browser.fullscreenAPI;
  this.isFullscreen(false);

  // Check for browser element fullscreen support
  if (fsApi) {
    document[fsApi.exitFullscreen]();
  } else if (this.tech.supportsFullScreen()) {
   this.techCall('exitFullScreen');
  } else {
   this.exitFullWindow();
   this.trigger('fullscreenchange');
  }

  return this;
};

/**
 * Old naming for exitFullscreen
 * @deprecated for exitFullscreen
 */
vjs.Player.prototype.cancelFullScreen = function(){
  vjs.log.warn('player.cancelFullScreen() has been deprecated, use player.exitFullscreen()');
  return this.exitFullscreen();
};

// When fullscreen isn't supported we can stretch the video container to as wide as the browser will let us.
vjs.Player.prototype.enterFullWindow = function(){
  this.isFullWindow = true;

  // Storing original doc overflow value to return to when fullscreen is off
  this.docOrigOverflow = document.documentElement.style.overflow;

  // Add listener for esc key to exit fullscreen
  vjs.on(document, 'keydown', vjs.bind(this, this.fullWindowOnEscKey));

  // Hide any scroll bars
  document.documentElement.style.overflow = 'hidden';

  // Apply fullscreen styles
  vjs.addClass(document.body, 'vjs-full-window');

  this.trigger('enterFullWindow');
};
vjs.Player.prototype.fullWindowOnEscKey = function(event){
  if (event.keyCode === 27) {
    if (this.isFullscreen() === true) {
      this.exitFullscreen();
    } else {
      this.exitFullWindow();
    }
  }
};

vjs.Player.prototype.exitFullWindow = function(){
  this.isFullWindow = false;
  vjs.off(document, 'keydown', this.fullWindowOnEscKey);

  // Unhide scroll bars.
  document.documentElement.style.overflow = this.docOrigOverflow;

  // Remove fullscreen styles
  vjs.removeClass(document.body, 'vjs-full-window');

  // Resize the box, controller, and poster to original sizes
  // this.positionAll();
  this.trigger('exitFullWindow');
};

vjs.Player.prototype.selectSource = function(sources){
  // Loop through each playback technology in the options order
  for (var i=0,j=this.options_['techOrder'];i<j.length;i++) {
    var techName = vjs.capitalize(j[i]),
        tech = window['videojs'][techName];

    // Check if the current tech is defined before continuing
    if (!tech) {
      vjs.log.error('The "' + techName + '" tech is undefined. Skipped browser support check for that tech.');
      continue;
    }

    // Check if the browser supports this technology
    if (tech.isSupported()) {
      // Loop through each source object
      for (var a=0,b=sources;a<b.length;a++) {
        var source = b[a];

        // Check if source can be played with this technology
        if (tech['canPlaySource'](source)) {
          return { source: source, tech: techName };
        }
      }
    }
  }

  return false;
};

/**
 * The source function updates the video source
 *
 * There are three types of variables you can pass as the argument.
 *
 * **URL String**: A URL to the the video file. Use this method if you are sure
 * the current playback technology (HTML5/Flash) can support the source you
 * provide. Currently only MP4 files can be used in both HTML5 and Flash.
 *
 *     myPlayer.src("http://www.example.com/path/to/video.mp4");
 *
 * **Source Object (or element):** A javascript object containing information
 * about the source file. Use this method if you want the player to determine if
 * it can support the file using the type information.
 *
 *     myPlayer.src({ type: "video/mp4", src: "http://www.example.com/path/to/video.mp4" });
 *
 * **Array of Source Objects:** To provide multiple versions of the source so
 * that it can be played using HTML5 across browsers you can use an array of
 * source objects. Video.js will detect which version is supported and load that
 * file.
 *
 *     myPlayer.src([
 *       { type: "video/mp4", src: "http://www.example.com/path/to/video.mp4" },
 *       { type: "video/webm", src: "http://www.example.com/path/to/video.webm" },
 *       { type: "video/ogg", src: "http://www.example.com/path/to/video.ogv" }
 *     ]);
 *
 * @param  {String|Object|Array=} source The source URL, object, or array of sources
 * @return {String} The current video source when getting
 * @return {String} The player when setting
 */
vjs.Player.prototype.src = function(source){
  if (source === undefined) {
    return this.techGet('src');
  }

  // case: Array of source objects to choose from and pick the best to play
  if (vjs.obj.isArray(source)) {
    this.sourceList_(source);

  // case: URL String (http://myvideo...)
  } else if (typeof source === 'string') {
    // create a source object from the string
    this.src({ src: source });

  // case: Source object { src: '', type: '' ... }
  } else if (source instanceof Object) {
    // check if the source has a type and the loaded tech cannot play the source
    // if there's no type we'll just try the current tech
    if (source.type && !window['videojs'][this.techName]['canPlaySource'](source)) {
      // create a source list with the current source and send through
      // the tech loop to check for a compatible technology
      this.sourceList_([source]);
    } else {
      this.cache_.src = source.src;
      this.currentType_ = source.type || '';

      // wait until the tech is ready to set the source
      this.ready(function(){

        // The setSource tech method was added with source handlers
        // so older techs won't support it
        // We need to check the direct prototype for the case where subclasses
        // of the tech do not support source handlers
        if (window['videojs'][this.techName].prototype.hasOwnProperty('setSource')) {
          this.techCall('setSource', source);
        } else {
          this.techCall('src', source.src);
        }

        if (this.options_['preload'] == 'auto') {
          this.load();
        }

        if (this.options_['autoplay']) {
          this.play();
        }
      });
    }
  }

  return this;
};

/**
 * Handle an array of source objects
 * @param  {[type]} sources Array of source objects
 * @private
 */
vjs.Player.prototype.sourceList_ = function(sources){
  var sourceTech = this.selectSource(sources);

  if (sourceTech) {
    if (sourceTech.tech === this.techName) {
      // if this technology is already loaded, set the source
      this.src(sourceTech.source);
    } else {
      // load this technology with the chosen source
      this.loadTech(sourceTech.tech, sourceTech.source);
    }
  } else {
    // We need to wrap this in a timeout to give folks a chance to add error event handlers
    this.setTimeout( function() {
      this.error({ code: 4, message: this.localize(this.options()['notSupportedMessage']) });
    }, 0);

    // we could not find an appropriate tech, but let's still notify the delegate that this is it
    // this needs a better comment about why this is needed
    this.triggerReady();
  }
};

/**
 * Begin loading the src data.
 * @return {vjs.Player} Returns the player
 */
vjs.Player.prototype.load = function(){
  this.techCall('load');
  return this;
};

/**
 * Returns the fully qualified URL of the current source value e.g. http://mysite.com/video.mp4
 * Can be used in conjuction with `currentType` to assist in rebuilding the current source object.
 * @return {String} The current source
 */
vjs.Player.prototype.currentSrc = function(){
  return this.techGet('currentSrc') || this.cache_.src || '';
};

/**
 * Get the current source type e.g. video/mp4
 * This can allow you rebuild the current source object so that you could load the same
 * source and tech later
 * @return {String} The source MIME type
 */
vjs.Player.prototype.currentType = function(){
    return this.currentType_ || '';
};

/**
 * Get or set the preload attribute.
 * @return {String} The preload attribute value when getting
 * @return {vjs.Player} Returns the player when setting
 */
vjs.Player.prototype.preload = function(value){
  if (value !== undefined) {
    this.techCall('setPreload', value);
    this.options_['preload'] = value;
    return this;
  }
  return this.techGet('preload');
};

/**
 * Get or set the autoplay attribute.
 * @return {String} The autoplay attribute value when getting
 * @return {vjs.Player} Returns the player when setting
 */
vjs.Player.prototype.autoplay = function(value){
  if (value !== undefined) {
    this.techCall('setAutoplay', value);
    this.options_['autoplay'] = value;
    return this;
  }
  return this.techGet('autoplay', value);
};

/**
 * Get or set the loop attribute on the video element.
 * @return {String} The loop attribute value when getting
 * @return {vjs.Player} Returns the player when setting
 */
vjs.Player.prototype.loop = function(value){
  if (value !== undefined) {
    this.techCall('setLoop', value);
    this.options_['loop'] = value;
    return this;
  }
  return this.techGet('loop');
};

/**
 * the url of the poster image source
 * @type {String}
 * @private
 */
vjs.Player.prototype.poster_;

/**
 * get or set the poster image source url
 *
 * ##### EXAMPLE:
 *
 *     // getting
 *     var currentPoster = myPlayer.poster();
 *
 *     // setting
 *     myPlayer.poster('http://example.com/myImage.jpg');
 *
 * @param  {String=} [src] Poster image source URL
 * @return {String} poster URL when getting
 * @return {vjs.Player} self when setting
 */
vjs.Player.prototype.poster = function(src){
  if (src === undefined) {
    return this.poster_;
  }

  // The correct way to remove a poster is to set as an empty string
  // other falsey values will throw errors
  if (!src) {
    src = '';
  }

  // update the internal poster variable
  this.poster_ = src;

  // update the tech's poster
  this.techCall('setPoster', src);

  // alert components that the poster has been set
  this.trigger('posterchange');

  return this;
};

/**
 * Whether or not the controls are showing
 * @type {Boolean}
 * @private
 */
vjs.Player.prototype.controls_;

/**
 * Get or set whether or not the controls are showing.
 * @param  {Boolean} controls Set controls to showing or not
 * @return {Boolean}    Controls are showing
 */
vjs.Player.prototype.controls = function(bool){
  if (bool !== undefined) {
    bool = !!bool; // force boolean
    // Don't trigger a change event unless it actually changed
    if (this.controls_ !== bool) {
      this.controls_ = bool;
      if (bool) {
        this.removeClass('vjs-controls-disabled');
        this.addClass('vjs-controls-enabled');
        this.trigger('controlsenabled');
      } else {
        this.removeClass('vjs-controls-enabled');
        this.addClass('vjs-controls-disabled');
        this.trigger('controlsdisabled');
      }
    }
    return this;
  }
  return this.controls_;
};

vjs.Player.prototype.usingNativeControls_;

/**
 * Toggle native controls on/off. Native controls are the controls built into
 * devices (e.g. default iPhone controls), Flash, or other techs
 * (e.g. Vimeo Controls)
 *
 * **This should only be set by the current tech, because only the tech knows
 * if it can support native controls**
 *
 * @param  {Boolean} bool    True signals that native controls are on
 * @return {vjs.Player}      Returns the player
 * @private
 */
vjs.Player.prototype.usingNativeControls = function(bool){
  if (bool !== undefined) {
    bool = !!bool; // force boolean
    // Don't trigger a change event unless it actually changed
    if (this.usingNativeControls_ !== bool) {
      this.usingNativeControls_ = bool;
      if (bool) {
        this.addClass('vjs-using-native-controls');

        /**
         * player is using the native device controls
         *
         * @event usingnativecontrols
         * @memberof vjs.Player
         * @instance
         * @private
         */
        this.trigger('usingnativecontrols');
      } else {
        this.removeClass('vjs-using-native-controls');

        /**
         * player is using the custom HTML controls
         *
         * @event usingcustomcontrols
         * @memberof vjs.Player
         * @instance
         * @private
         */
        this.trigger('usingcustomcontrols');
      }
    }
    return this;
  }
  return this.usingNativeControls_;
};

/**
 * Store the current media error
 * @type {Object}
 * @private
 */
vjs.Player.prototype.error_ = null;

/**
 * Set or get the current MediaError
 * @param  {*} err A MediaError or a String/Number to be turned into a MediaError
 * @return {vjs.MediaError|null}     when getting
 * @return {vjs.Player}              when setting
 */
vjs.Player.prototype.error = function(err){
  if (err === undefined) {
    return this.error_;
  }

  // restoring to default
  if (err === null) {
    this.error_ = err;
    this.removeClass('vjs-error');
    return this;
  }

  // error instance
  if (err instanceof vjs.MediaError) {
    this.error_ = err;
  } else {
    this.error_ = new vjs.MediaError(err);
  }

  // fire an error event on the player
  this.trigger('error');

  // add the vjs-error classname to the player
  this.addClass('vjs-error');

  // log the name of the error type and any message
  // ie8 just logs "[object object]" if you just log the error object
  vjs.log.error('(CODE:'+this.error_.code+' '+vjs.MediaError.errorTypes[this.error_.code]+')', this.error_.message, this.error_);

  return this;
};

/**
 * Returns whether or not the player is in the "ended" state.
 * @return {Boolean} True if the player is in the ended state, false if not.
 */
vjs.Player.prototype.ended = function(){ return this.techGet('ended'); };

/**
 * Returns whether or not the player is in the "seeking" state.
 * @return {Boolean} True if the player is in the seeking state, false if not.
 */
vjs.Player.prototype.seeking = function(){ return this.techGet('seeking'); };

// When the player is first initialized, trigger activity so components
// like the control bar show themselves if needed
vjs.Player.prototype.userActivity_ = true;
vjs.Player.prototype.reportUserActivity = function(event){
  this.userActivity_ = true;
};

vjs.Player.prototype.userActive_ = true;
vjs.Player.prototype.userActive = function(bool){
  if (bool !== undefined) {
    bool = !!bool;
    if (bool !== this.userActive_) {
      this.userActive_ = bool;
      if (bool) {
        // If the user was inactive and is now active we want to reset the
        // inactivity timer
        this.userActivity_ = true;
        this.removeClass('vjs-user-inactive');
        this.addClass('vjs-user-active');
        this.trigger('useractive');
      } else {
        // We're switching the state to inactive manually, so erase any other
        // activity
        this.userActivity_ = false;

        // Chrome/Safari/IE have bugs where when you change the cursor it can
        // trigger a mousemove event. This causes an issue when you're hiding
        // the cursor when the user is inactive, and a mousemove signals user
        // activity. Making it impossible to go into inactive mode. Specifically
        // this happens in fullscreen when we really need to hide the cursor.
        //
        // When this gets resolved in ALL browsers it can be removed
        // https://code.google.com/p/chromium/issues/detail?id=103041
        if(this.tech) {
          this.tech.one('mousemove', function(e){
            e.stopPropagation();
            e.preventDefault();
          });
        }

        this.removeClass('vjs-user-active');
        this.addClass('vjs-user-inactive');
        this.trigger('userinactive');
      }
    }
    return this;
  }
  return this.userActive_;
};

vjs.Player.prototype.listenForUserActivity = function(){
  var onActivity, onMouseMove, onMouseDown, mouseInProgress, onMouseUp,
      activityCheck, inactivityTimeout, lastMoveX, lastMoveY;

  onActivity = vjs.bind(this, this.reportUserActivity);

  onMouseMove = function(e) {
    // #1068 - Prevent mousemove spamming
    // Chrome Bug: https://code.google.com/p/chromium/issues/detail?id=366970
    if(e.screenX != lastMoveX || e.screenY != lastMoveY) {
      lastMoveX = e.screenX;
      lastMoveY = e.screenY;
      onActivity();
    }
  };

  onMouseDown = function() {
    onActivity();
    // For as long as the they are touching the device or have their mouse down,
    // we consider them active even if they're not moving their finger or mouse.
    // So we want to continue to update that they are active
    this.clearInterval(mouseInProgress);
    // Setting userActivity=true now and setting the interval to the same time
    // as the activityCheck interval (250) should ensure we never miss the
    // next activityCheck
    mouseInProgress = this.setInterval(onActivity, 250);
  };

  onMouseUp = function(event) {
    onActivity();
    // Stop the interval that maintains activity if the mouse/touch is down
    this.clearInterval(mouseInProgress);
  };

  // Any mouse movement will be considered user activity
  this.on('mousedown', onMouseDown);
  this.on('mousemove', onMouseMove);
  this.on('mouseup', onMouseUp);

  // Listen for keyboard navigation
  // Shouldn't need to use inProgress interval because of key repeat
  this.on('keydown', onActivity);
  this.on('keyup', onActivity);

  // Run an interval every 250 milliseconds instead of stuffing everything into
  // the mousemove/touchmove function itself, to prevent performance degradation.
  // `this.reportUserActivity` simply sets this.userActivity_ to true, which
  // then gets picked up by this loop
  // http://ejohn.org/blog/learning-from-twitter/
  activityCheck = this.setInterval(function() {
    // Check to see if mouse/touch activity has happened
    if (this.userActivity_) {
      // Reset the activity tracker
      this.userActivity_ = false;

      // If the user state was inactive, set the state to active
      this.userActive(true);

      // Clear any existing inactivity timeout to start the timer over
      this.clearTimeout(inactivityTimeout);

      var timeout = this.options()['inactivityTimeout'];
      if (timeout > 0) {
          // In <timeout> milliseconds, if no more activity has occurred the
          // user will be considered inactive
          inactivityTimeout = this.setTimeout(function () {
              // Protect against the case where the inactivityTimeout can trigger just
              // before the next user activity is picked up by the activityCheck loop
              // causing a flicker
              if (!this.userActivity_) {
                  this.userActive(false);
              }
          }, timeout);
      }
    }
  }, 250);
};

/**
 * Gets or sets the current playback rate.
 * @param  {Boolean} rate   New playback rate to set.
 * @return {Number}         Returns the new playback rate when setting
 * @return {Number}         Returns the current playback rate when getting
 */
vjs.Player.prototype.playbackRate = function(rate) {
  if (rate !== undefined) {
    this.techCall('setPlaybackRate', rate);
    return this;
  }

  if (this.tech && this.tech['featuresPlaybackRate']) {
    return this.techGet('playbackRate');
  } else {
    return 1.0;
  }

};

/**
 * Store the current audio state
 * @type {Boolean}
 * @private
 */
vjs.Player.prototype.isAudio_ = false;

/**
 * Gets or sets the audio flag
 *
 * @param  {Boolean} bool    True signals that this is an audio player.
 * @return {Boolean}         Returns true if player is audio, false if not when getting
 * @return {vjs.Player}      Returns the player if setting
 * @private
 */
vjs.Player.prototype.isAudio = function(bool) {
  if (bool !== undefined) {
    this.isAudio_ = !!bool;
    return this;
  }

  return this.isAudio_;
};

/**
 * Returns the current state of network activity for the element, from
 * the codes in the list below.
 * - NETWORK_EMPTY (numeric value 0)
 *   The element has not yet been initialised. All attributes are in
 *   their initial states.
 * - NETWORK_IDLE (numeric value 1)
 *   The element's resource selection algorithm is active and has
 *   selected a resource, but it is not actually using the network at
 *   this time.
 * - NETWORK_LOADING (numeric value 2)
 *   The user agent is actively trying to download data.
 * - NETWORK_NO_SOURCE (numeric value 3)
 *   The element's resource selection algorithm is active, but it has
 *   not yet found a resource to use.
 * @return {Number} the current network activity state
 * @see https://html.spec.whatwg.org/multipage/embedded-content.html#network-states
 */
vjs.Player.prototype.networkState = function(){
  return this.techGet('networkState');
};

/**
 * Returns a value that expresses the current state of the element
 * with respect to rendering the current playback position, from the
 * codes in the list below.
 * - HAVE_NOTHING (numeric value 0)
 *   No information regarding the media resource is available.
 * - HAVE_METADATA (numeric value 1)
 *   Enough of the resource has been obtained that the duration of the
 *   resource is available.
 * - HAVE_CURRENT_DATA (numeric value 2)
 *   Data for the immediate current playback position is available.
 * - HAVE_FUTURE_DATA (numeric value 3)
 *   Data for the immediate current playback position is available, as
 *   well as enough data for the user agent to advance the current
 *   playback position in the direction of playback.
 * - HAVE_ENOUGH_DATA (numeric value 4)
 *   The user agent estimates that enough data is available for
 *   playback to proceed uninterrupted.
 * @return {Number} the current playback rendering state
 * @see https://html.spec.whatwg.org/multipage/embedded-content.html#dom-media-readystate
 */
vjs.Player.prototype.readyState = function(){
  return this.techGet('readyState');
};

/**
 * Text tracks are tracks of timed text events.
 * Captions - text displayed over the video for the hearing impaired
 * Subtitles - text displayed over the video for those who don't understand language in the video
 * Chapters - text displayed in a menu allowing the user to jump to particular points (chapters) in the video
 * Descriptions (not supported yet) - audio descriptions that are read back to the user by a screen reading device
 */

/**
 * Get an array of associated text tracks. captions, subtitles, chapters, descriptions
 * http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-texttracks
 * @return {Array}           Array of track objects
 */
vjs.Player.prototype.textTracks = function(){
  // cannot use techGet directly because it checks to see whether the tech is ready.
  // Flash is unlikely to be ready in time but textTracks should still work.
  return this.tech && this.tech['textTracks']();
};

vjs.Player.prototype.remoteTextTracks = function() {
  return this.tech && this.tech['remoteTextTracks']();
};

/**
 * Add a text track
 * In addition to the W3C settings we allow adding additional info through options.
 * http://www.w3.org/html/wg/drafts/html/master/embedded-content-0.html#dom-media-addtexttrack
 * @param {String}  kind        Captions, subtitles, chapters, descriptions, or metadata
 * @param {String=} label       Optional label
 * @param {String=} language    Optional language
 */
vjs.Player.prototype.addTextTrack = function(kind, label, language) {
  return this.tech && this.tech['addTextTrack'](kind, label, language);
};

vjs.Player.prototype.addRemoteTextTrack = function(options) {
  return this.tech && this.tech['addRemoteTextTrack'](options);
};

vjs.Player.prototype.removeRemoteTextTrack = function(track) {
  this.tech && this.tech['removeRemoteTextTrack'](track);
};

// Methods to add support for
// initialTime: function(){ return this.techCall('initialTime'); },
// startOffsetTime: function(){ return this.techCall('startOffsetTime'); },
// played: function(){ return this.techCall('played'); },
// seekable: function(){ return this.techCall('seekable'); },
// videoTracks: function(){ return this.techCall('videoTracks'); },
// audioTracks: function(){ return this.techCall('audioTracks'); },
// videoWidth: function(){ return this.techCall('videoWidth'); },
// videoHeight: function(){ return this.techCall('videoHeight'); },
// defaultPlaybackRate: function(){ return this.techCall('defaultPlaybackRate'); },
// mediaGroup: function(){ return this.techCall('mediaGroup'); },
// controller: function(){ return this.techCall('controller'); },
// defaultMuted: function(){ return this.techCall('defaultMuted'); }

// TODO
// currentSrcList: the array of sources including other formats and bitrates
// playList: array of source lists in order of playback
/**
 * Container of main controls
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @constructor
 * @extends vjs.Component
 */
vjs.ControlBar = vjs.Component.extend();

vjs.ControlBar.prototype.options_ = {
  loadEvent: 'play',
  children: {
    'playToggle': {},
    'currentTimeDisplay': {},
    'timeDivider': {},
    'durationDisplay': {},
    'remainingTimeDisplay': {},
    'liveDisplay': {},
    'progressControl': {},
    'fullscreenToggle': {},
    'volumeControl': {},
    'muteToggle': {},
    // 'volumeMenuButton': {},
    'playbackRateMenuButton': {},
    'subtitlesButton': {},
    'captionsButton': {},
    'chaptersButton': {}
  }
};

vjs.ControlBar.prototype.createEl = function(){
  return vjs.createEl('div', {
    className: 'vjs-control-bar'
  });
};
/**
 * Displays the live indicator
 * TODO - Future make it click to snap to live
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.LiveDisplay = vjs.Component.extend({
  init: function(player, options){
    vjs.Component.call(this, player, options);
  }
});

vjs.LiveDisplay.prototype.createEl = function(){
  var el = vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-live-controls vjs-control'
  });

  this.contentEl_ = vjs.createEl('div', {
    className: 'vjs-live-display',
    innerHTML: '<span class="vjs-control-text">' + this.localize('Stream Type') + '</span>' + this.localize('LIVE'),
    'aria-live': 'off'
  });

  el.appendChild(this.contentEl_);

  return el;
};
/**
 * Button to toggle between play and pause
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @constructor
 */
vjs.PlayToggle = vjs.Button.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Button.call(this, player, options);

    this.on(player, 'play', this.onPlay);
    this.on(player, 'pause', this.onPause);
  }
});

vjs.PlayToggle.prototype.buttonText = 'Play';

vjs.PlayToggle.prototype.buildCSSClass = function(){
  return 'vjs-play-control ' + vjs.Button.prototype.buildCSSClass.call(this);
};

// OnClick - Toggle between play and pause
vjs.PlayToggle.prototype.onClick = function(){
  if (this.player_.paused()) {
    this.player_.play();
  } else {
    this.player_.pause();
  }
};

  // OnPlay - Add the vjs-playing class to the element so it can change appearance
vjs.PlayToggle.prototype.onPlay = function(){
  this.removeClass('vjs-paused');
  this.addClass('vjs-playing');
  this.el_.children[0].children[0].innerHTML = this.localize('Pause'); // change the button text to "Pause"
};

  // OnPause - Add the vjs-paused class to the element so it can change appearance
vjs.PlayToggle.prototype.onPause = function(){
  this.removeClass('vjs-playing');
  this.addClass('vjs-paused');
  this.el_.children[0].children[0].innerHTML = this.localize('Play'); // change the button text to "Play"
};
/**
 * Displays the current time
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.CurrentTimeDisplay = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);

    this.on(player, 'timeupdate', this.updateContent);
  }
});

vjs.CurrentTimeDisplay.prototype.createEl = function(){
  var el = vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-current-time vjs-time-controls vjs-control'
  });

  this.contentEl_ = vjs.createEl('div', {
    className: 'vjs-current-time-display',
    innerHTML: '<span class="vjs-control-text">Current Time </span>' + '0:00', // label the current time for screen reader users
    'aria-live': 'off' // tell screen readers not to automatically read the time as it changes
  });

  el.appendChild(this.contentEl_);
  return el;
};

vjs.CurrentTimeDisplay.prototype.updateContent = function(){
  // Allows for smooth scrubbing, when player can't keep up.
  var time = (this.player_.scrubbing) ? this.player_.getCache().currentTime : this.player_.currentTime();
  this.contentEl_.innerHTML = '<span class="vjs-control-text">' + this.localize('Current Time') + '</span> ' + vjs.formatTime(time, this.player_.duration());
};

/**
 * Displays the duration
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.DurationDisplay = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);

    // this might need to be changed to 'durationchange' instead of 'timeupdate' eventually,
    // however the durationchange event fires before this.player_.duration() is set,
    // so the value cannot be written out using this method.
    // Once the order of durationchange and this.player_.duration() being set is figured out,
    // this can be updated.
    this.on(player, 'timeupdate', this.updateContent);
  }
});

vjs.DurationDisplay.prototype.createEl = function(){
  var el = vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-duration vjs-time-controls vjs-control'
  });

  this.contentEl_ = vjs.createEl('div', {
    className: 'vjs-duration-display',
    innerHTML: '<span class="vjs-control-text">' + this.localize('Duration Time') + '</span> ' + '0:00', // label the duration time for screen reader users
    'aria-live': 'off' // tell screen readers not to automatically read the time as it changes
  });

  el.appendChild(this.contentEl_);
  return el;
};

vjs.DurationDisplay.prototype.updateContent = function(){
  var duration = this.player_.duration();
  if (duration) {
      this.contentEl_.innerHTML = '<span class="vjs-control-text">' + this.localize('Duration Time') + '</span> ' + vjs.formatTime(duration); // label the duration time for screen reader users
  }
};

/**
 * The separator between the current time and duration
 *
 * Can be hidden if it's not needed in the design.
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.TimeDivider = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);
  }
});

vjs.TimeDivider.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-time-divider',
    innerHTML: '<div><span>/</span></div>'
  });
};

/**
 * Displays the time left in the video
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.RemainingTimeDisplay = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);

    this.on(player, 'timeupdate', this.updateContent);
  }
});

vjs.RemainingTimeDisplay.prototype.createEl = function(){
  var el = vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-remaining-time vjs-time-controls vjs-control'
  });

  this.contentEl_ = vjs.createEl('div', {
    className: 'vjs-remaining-time-display',
    innerHTML: '<span class="vjs-control-text">' + this.localize('Remaining Time') + '</span> ' + '-0:00', // label the remaining time for screen reader users
    'aria-live': 'off' // tell screen readers not to automatically read the time as it changes
  });

  el.appendChild(this.contentEl_);
  return el;
};

vjs.RemainingTimeDisplay.prototype.updateContent = function(){
  if (this.player_.duration()) {
    this.contentEl_.innerHTML = '<span class="vjs-control-text">' + this.localize('Remaining Time') + '</span> ' + '-'+ vjs.formatTime(this.player_.remainingTime());
  }

  // Allows for smooth scrubbing, when player can't keep up.
  // var time = (this.player_.scrubbing) ? this.player_.getCache().currentTime : this.player_.currentTime();
  // this.contentEl_.innerHTML = vjs.formatTime(time, this.player_.duration());
};
/**
 * Toggle fullscreen video
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @extends vjs.Button
 */
vjs.FullscreenToggle = vjs.Button.extend({
  /**
   * @constructor
   * @memberof vjs.FullscreenToggle
   * @instance
   */
  init: function(player, options){
    vjs.Button.call(this, player, options);
  }
});

vjs.FullscreenToggle.prototype.buttonText = 'Fullscreen';

vjs.FullscreenToggle.prototype.buildCSSClass = function(){
  return 'vjs-fullscreen-control ' + vjs.Button.prototype.buildCSSClass.call(this);
};

vjs.FullscreenToggle.prototype.onClick = function(){
  if (!this.player_.isFullscreen()) {
    this.player_.requestFullscreen();
    this.controlText_.innerHTML = this.localize('Non-Fullscreen');
  } else {
    this.player_.exitFullscreen();
    this.controlText_.innerHTML = this.localize('Fullscreen');
  }
};
/**
 * The Progress Control component contains the seek bar, load progress,
 * and play progress
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.ProgressControl = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);
  }
});

vjs.ProgressControl.prototype.options_ = {
  children: {
    'seekBar': {}
  }
};

vjs.ProgressControl.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-progress-control vjs-control'
  });
};

/**
 * Seek Bar and holder for the progress bars
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.SeekBar = vjs.Slider.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Slider.call(this, player, options);
    this.on(player, 'timeupdate', this.updateARIAAttributes);
    player.ready(vjs.bind(this, this.updateARIAAttributes));
  }
});

vjs.SeekBar.prototype.options_ = {
  children: {
    'loadProgressBar': {},
    'playProgressBar': {},
    'seekHandle': {}
  },
  'barName': 'playProgressBar',
  'handleName': 'seekHandle'
};

vjs.SeekBar.prototype.playerEvent = 'timeupdate';

vjs.SeekBar.prototype.createEl = function(){
  return vjs.Slider.prototype.createEl.call(this, 'div', {
    className: 'vjs-progress-holder',
    'aria-label': 'video progress bar'
  });
};

vjs.SeekBar.prototype.updateARIAAttributes = function(){
    // Allows for smooth scrubbing, when player can't keep up.
    var time = (this.player_.scrubbing) ? this.player_.getCache().currentTime : this.player_.currentTime();
    this.el_.setAttribute('aria-valuenow',vjs.round(this.getPercent()*100, 2)); // machine readable value of progress bar (percentage complete)
    this.el_.setAttribute('aria-valuetext',vjs.formatTime(time, this.player_.duration())); // human readable value of progress bar (time complete)
};

vjs.SeekBar.prototype.getPercent = function(){
  return this.player_.currentTime() / this.player_.duration();
};

vjs.SeekBar.prototype.onMouseDown = function(event){
  vjs.Slider.prototype.onMouseDown.call(this, event);

  this.player_.scrubbing = true;
  this.player_.addClass('vjs-scrubbing');

  this.videoWasPlaying = !this.player_.paused();
  this.player_.pause();
};

vjs.SeekBar.prototype.onMouseMove = function(event){
  var newTime = this.calculateDistance(event) * this.player_.duration();

  // Don't let video end while scrubbing.
  if (newTime == this.player_.duration()) { newTime = newTime - 0.1; }

  // Set new time (tell player to seek to new time)
  this.player_.currentTime(newTime);
};

vjs.SeekBar.prototype.onMouseUp = function(event){
  vjs.Slider.prototype.onMouseUp.call(this, event);

  this.player_.scrubbing = false;
  this.player_.removeClass('vjs-scrubbing');
  if (this.videoWasPlaying) {
    this.player_.play();
  }
};

vjs.SeekBar.prototype.stepForward = function(){
  this.player_.currentTime(this.player_.currentTime() + 5); // more quickly fast forward for keyboard-only users
};

vjs.SeekBar.prototype.stepBack = function(){
  this.player_.currentTime(this.player_.currentTime() - 5); // more quickly rewind for keyboard-only users
};

/**
 * Shows load progress
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.LoadProgressBar = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);
    this.on(player, 'progress', this.update);
  }
});

vjs.LoadProgressBar.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-load-progress',
    innerHTML: '<span class="vjs-control-text"><span>' + this.localize('Loaded') + '</span>: 0%</span>'
  });
};

vjs.LoadProgressBar.prototype.update = function(){
  var i, start, end, part,
      buffered = this.player_.buffered(),
      duration = this.player_.duration(),
      bufferedEnd = this.player_.bufferedEnd(),
      children = this.el_.children,
      // get the percent width of a time compared to the total end
      percentify = function (time, end){
        var percent = (time / end) || 0; // no NaN
        return (percent * 100) + '%';
      };

  // update the width of the progress bar
  this.el_.style.width = percentify(bufferedEnd, duration);

  // add child elements to represent the individual buffered time ranges
  for (i = 0; i < buffered.length; i++) {
    start = buffered.start(i),
    end = buffered.end(i),
    part = children[i];

    if (!part) {
      part = this.el_.appendChild(vjs.createEl());
    }

    // set the percent based on the width of the progress bar (bufferedEnd)
    part.style.left = percentify(start, bufferedEnd);
    part.style.width = percentify(end - start, bufferedEnd);
  }

  // remove unused buffered range elements
  for (i = children.length; i > buffered.length; i--) {
    this.el_.removeChild(children[i-1]);
  }
};

/**
 * Shows play progress
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.PlayProgressBar = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);
  }
});

vjs.PlayProgressBar.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-play-progress',
    innerHTML: '<span class="vjs-control-text"><span>' + this.localize('Progress') + '</span>: 0%</span>'
  });
};

/**
 * The Seek Handle shows the current position of the playhead during playback,
 * and can be dragged to adjust the playhead.
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.SeekHandle = vjs.SliderHandle.extend({
  init: function(player, options) {
    vjs.SliderHandle.call(this, player, options);
    this.on(player, 'timeupdate', this.updateContent);
  }
});

/**
 * The default value for the handle content, which may be read by screen readers
 *
 * @type {String}
 * @private
 */
vjs.SeekHandle.prototype.defaultValue = '00:00';

/** @inheritDoc */
vjs.SeekHandle.prototype.createEl = function() {
  return vjs.SliderHandle.prototype.createEl.call(this, 'div', {
    className: 'vjs-seek-handle',
    'aria-live': 'off'
  });
};

vjs.SeekHandle.prototype.updateContent = function() {
  var time = (this.player_.scrubbing) ? this.player_.getCache().currentTime : this.player_.currentTime();
  this.el_.innerHTML = '<span class="vjs-control-text">' + vjs.formatTime(time, this.player_.duration()) + '</span>';
};
/**
 * The component for controlling the volume level
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.VolumeControl = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);

    // hide volume controls when they're not supported by the current tech
    if (player.tech && player.tech['featuresVolumeControl'] === false) {
      this.addClass('vjs-hidden');
    }
    this.on(player, 'loadstart', function(){
      if (player.tech['featuresVolumeControl'] === false) {
        this.addClass('vjs-hidden');
      } else {
        this.removeClass('vjs-hidden');
      }
    });
  }
});

vjs.VolumeControl.prototype.options_ = {
  children: {
    'volumeBar': {}
  }
};

vjs.VolumeControl.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-volume-control vjs-control'
  });
};

/**
 * The bar that contains the volume level and can be clicked on to adjust the level
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.VolumeBar = vjs.Slider.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Slider.call(this, player, options);
    this.on(player, 'volumechange', this.updateARIAAttributes);
    player.ready(vjs.bind(this, this.updateARIAAttributes));
  }
});

vjs.VolumeBar.prototype.updateARIAAttributes = function(){
  // Current value of volume bar as a percentage
  this.el_.setAttribute('aria-valuenow',vjs.round(this.player_.volume()*100, 2));
  this.el_.setAttribute('aria-valuetext',vjs.round(this.player_.volume()*100, 2)+'%');
};

vjs.VolumeBar.prototype.options_ = {
  children: {
    'volumeLevel': {},
    'volumeHandle': {}
  },
  'barName': 'volumeLevel',
  'handleName': 'volumeHandle'
};

vjs.VolumeBar.prototype.playerEvent = 'volumechange';

vjs.VolumeBar.prototype.createEl = function(){
  return vjs.Slider.prototype.createEl.call(this, 'div', {
    className: 'vjs-volume-bar',
    'aria-label': 'volume level'
  });
};

vjs.VolumeBar.prototype.onMouseMove = function(event) {
  if (this.player_.muted()) {
    this.player_.muted(false);
  }

  this.player_.volume(this.calculateDistance(event));
};

vjs.VolumeBar.prototype.getPercent = function(){
  if (this.player_.muted()) {
    return 0;
  } else {
    return this.player_.volume();
  }
};

vjs.VolumeBar.prototype.stepForward = function(){
  this.player_.volume(this.player_.volume() + 0.1);
};

vjs.VolumeBar.prototype.stepBack = function(){
  this.player_.volume(this.player_.volume() - 0.1);
};

/**
 * Shows volume level
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.VolumeLevel = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);
  }
});

vjs.VolumeLevel.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-volume-level',
    innerHTML: '<span class="vjs-control-text"></span>'
  });
};

/**
 * The volume handle can be dragged to adjust the volume level
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
 vjs.VolumeHandle = vjs.SliderHandle.extend();

 vjs.VolumeHandle.prototype.defaultValue = '00:00';

 /** @inheritDoc */
 vjs.VolumeHandle.prototype.createEl = function(){
   return vjs.SliderHandle.prototype.createEl.call(this, 'div', {
     className: 'vjs-volume-handle'
   });
 };
/**
 * A button component for muting the audio
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.MuteToggle = vjs.Button.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Button.call(this, player, options);

    this.on(player, 'volumechange', this.update);

    // hide mute toggle if the current tech doesn't support volume control
    if (player.tech && player.tech['featuresVolumeControl'] === false) {
      this.addClass('vjs-hidden');
    }

    this.on(player, 'loadstart', function(){
      if (player.tech['featuresVolumeControl'] === false) {
        this.addClass('vjs-hidden');
      } else {
        this.removeClass('vjs-hidden');
      }
    });
  }
});

vjs.MuteToggle.prototype.createEl = function(){
  return vjs.Button.prototype.createEl.call(this, 'div', {
    className: 'vjs-mute-control vjs-control',
    innerHTML: '<div><span class="vjs-control-text">' + this.localize('Mute') + '</span></div>'
  });
};

vjs.MuteToggle.prototype.onClick = function(){
  this.player_.muted( this.player_.muted() ? false : true );
};

vjs.MuteToggle.prototype.update = function(){
  var vol = this.player_.volume(),
      level = 3;

  if (vol === 0 || this.player_.muted()) {
    level = 0;
  } else if (vol < 0.33) {
    level = 1;
  } else if (vol < 0.67) {
    level = 2;
  }

  // Don't rewrite the button text if the actual text doesn't change.
  // This causes unnecessary and confusing information for screen reader users.
  // This check is needed because this function gets called every time the volume level is changed.
  if(this.player_.muted()){
      if(this.el_.children[0].children[0].innerHTML!=this.localize('Unmute')){
          this.el_.children[0].children[0].innerHTML = this.localize('Unmute'); // change the button text to "Unmute"
      }
  } else {
      if(this.el_.children[0].children[0].innerHTML!=this.localize('Mute')){
          this.el_.children[0].children[0].innerHTML = this.localize('Mute'); // change the button text to "Mute"
      }
  }

  /* TODO improve muted icon classes */
  for (var i = 0; i < 4; i++) {
    vjs.removeClass(this.el_, 'vjs-vol-'+i);
  }
  vjs.addClass(this.el_, 'vjs-vol-'+level);
};
/**
 * Menu button with a popup for showing the volume slider.
 * @constructor
 */
vjs.VolumeMenuButton = vjs.MenuButton.extend({
  /** @constructor */
  init: function(player, options){
    vjs.MenuButton.call(this, player, options);

    // Same listeners as MuteToggle
    this.on(player, 'volumechange', this.volumeUpdate);

    // hide mute toggle if the current tech doesn't support volume control
    if (player.tech && player.tech['featuresVolumeControl'] === false) {
      this.addClass('vjs-hidden');
    }
    this.on(player, 'loadstart', function(){
      if (player.tech['featuresVolumeControl'] === false) {
        this.addClass('vjs-hidden');
      } else {
        this.removeClass('vjs-hidden');
      }
    });
    this.addClass('vjs-menu-button');
  }
});

vjs.VolumeMenuButton.prototype.createMenu = function(){
  var menu = new vjs.Menu(this.player_, {
    contentElType: 'div'
  });
  var vc = new vjs.VolumeBar(this.player_, this.options_['volumeBar']);
  vc.on('focus', function() {
    menu.lockShowing();
  });
  vc.on('blur', function() {
    menu.unlockShowing();
  });
  menu.addChild(vc);
  return menu;
};

vjs.VolumeMenuButton.prototype.onClick = function(){
  vjs.MuteToggle.prototype.onClick.call(this);
  vjs.MenuButton.prototype.onClick.call(this);
};

vjs.VolumeMenuButton.prototype.createEl = function(){
  return vjs.Button.prototype.createEl.call(this, 'div', {
    className: 'vjs-volume-menu-button vjs-menu-button vjs-control',
    innerHTML: '<div><span class="vjs-control-text">' + this.localize('Mute') + '</span></div>'
  });
};
vjs.VolumeMenuButton.prototype.volumeUpdate = vjs.MuteToggle.prototype.update;
/**
 * The component for controlling the playback rate
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.PlaybackRateMenuButton = vjs.MenuButton.extend({
  /** @constructor */
  init: function(player, options){
    vjs.MenuButton.call(this, player, options);

    this.updateVisibility();
    this.updateLabel();

    this.on(player, 'loadstart', this.updateVisibility);
    this.on(player, 'ratechange', this.updateLabel);
  }
});

vjs.PlaybackRateMenuButton.prototype.buttonText = 'Playback Rate';
vjs.PlaybackRateMenuButton.prototype.className = 'vjs-playback-rate';

vjs.PlaybackRateMenuButton.prototype.createEl = function(){
  var el = vjs.MenuButton.prototype.createEl.call(this);

  this.labelEl_ = vjs.createEl('div', {
    className: 'vjs-playback-rate-value',
    innerHTML: 1.0
  });

  el.appendChild(this.labelEl_);

  return el;
};

// Menu creation
vjs.PlaybackRateMenuButton.prototype.createMenu = function(){
  var menu = new vjs.Menu(this.player());
  var rates = this.player().options()['playbackRates'];

  if (rates) {
    for (var i = rates.length - 1; i >= 0; i--) {
      menu.addChild(
        new vjs.PlaybackRateMenuItem(this.player(), { 'rate': rates[i] + 'x'})
        );
    }
  }

  return menu;
};

vjs.PlaybackRateMenuButton.prototype.updateARIAAttributes = function(){
  // Current playback rate
  this.el().setAttribute('aria-valuenow', this.player().playbackRate());
};

vjs.PlaybackRateMenuButton.prototype.onClick = function(){
  // select next rate option
  var currentRate = this.player().playbackRate();
  var rates = this.player().options()['playbackRates'];
  // this will select first one if the last one currently selected
  var newRate = rates[0];
  for (var i = 0; i <rates.length ; i++) {
    if (rates[i] > currentRate) {
      newRate = rates[i];
      break;
    }
  }
  this.player().playbackRate(newRate);
};

vjs.PlaybackRateMenuButton.prototype.playbackRateSupported = function(){
  return this.player().tech
    && this.player().tech['featuresPlaybackRate']
    && this.player().options()['playbackRates']
    && this.player().options()['playbackRates'].length > 0
  ;
};

/**
 * Hide playback rate controls when they're no playback rate options to select
 */
vjs.PlaybackRateMenuButton.prototype.updateVisibility = function(){
  if (this.playbackRateSupported()) {
    this.removeClass('vjs-hidden');
  } else {
    this.addClass('vjs-hidden');
  }
};

/**
 * Update button label when rate changed
 */
vjs.PlaybackRateMenuButton.prototype.updateLabel = function(){
  if (this.playbackRateSupported()) {
    this.labelEl_.innerHTML = this.player().playbackRate() + 'x';
  }
};

/**
 * The specific menu item type for selecting a playback rate
 *
 * @constructor
 */
vjs.PlaybackRateMenuItem = vjs.MenuItem.extend({
  contentElType: 'button',
  /** @constructor */
  init: function(player, options){
    var label = this.label = options['rate'];
    var rate = this.rate = parseFloat(label, 10);

    // Modify options for parent MenuItem class's init.
    options['label'] = label;
    options['selected'] = rate === 1;
    vjs.MenuItem.call(this, player, options);

    this.on(player, 'ratechange', this.update);
  }
});

vjs.PlaybackRateMenuItem.prototype.onClick = function(){
  vjs.MenuItem.prototype.onClick.call(this);
  this.player().playbackRate(this.rate);
};

vjs.PlaybackRateMenuItem.prototype.update = function(){
  this.selected(this.player().playbackRate() == this.rate);
};
/* Poster Image
================================================================================ */
/**
 * The component that handles showing the poster image.
 *
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.PosterImage = vjs.Button.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Button.call(this, player, options);

    this.update();
    player.on('posterchange', vjs.bind(this, this.update));
  }
});

/**
 * Clean up the poster image
 */
vjs.PosterImage.prototype.dispose = function(){
  this.player().off('posterchange', this.update);
  vjs.Button.prototype.dispose.call(this);
};

/**
 * Create the poster image element
 * @return {Element}
 */
vjs.PosterImage.prototype.createEl = function(){
  var el = vjs.createEl('div', {
    className: 'vjs-poster',

    // Don't want poster to be tabbable.
    tabIndex: -1
  });

  // To ensure the poster image resizes while maintaining its original aspect
  // ratio, use a div with `background-size` when available. For browsers that
  // do not support `background-size` (e.g. IE8), fall back on using a regular
  // img element.
  if (!vjs.BACKGROUND_SIZE_SUPPORTED) {
    this.fallbackImg_ = vjs.createEl('img');
    el.appendChild(this.fallbackImg_);
  }

  return el;
};

/**
 * Event handler for updates to the player's poster source
 */
vjs.PosterImage.prototype.update = function(){
  var url = this.player().poster();

  this.setSrc(url);

  // If there's no poster source we should display:none on this component
  // so it's not still clickable or right-clickable
  if (url) {
    this.show();
  } else {
    this.hide();
  }
};

/**
 * Set the poster source depending on the display method
 */
vjs.PosterImage.prototype.setSrc = function(url){
  var backgroundImage;

  if (this.fallbackImg_) {
    this.fallbackImg_.src = url;
  } else {
    backgroundImage = '';
    // Any falsey values should stay as an empty string, otherwise
    // this will throw an extra error
    if (url) {
      backgroundImage = 'url("' + url + '")';
    }

    this.el_.style.backgroundImage = backgroundImage;
  }
};

/**
 * Event handler for clicks on the poster image
 */
vjs.PosterImage.prototype.onClick = function(){
  // We don't want a click to trigger playback when controls are disabled
  // but CSS should be hiding the poster to prevent that from happening
  this.player_.play();
};
/* Loading Spinner
================================================================================ */
/**
 * Loading spinner for waiting events
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @constructor
 */
vjs.LoadingSpinner = vjs.Component.extend({
  /** @constructor */
  init: function(player, options){
    vjs.Component.call(this, player, options);

    // MOVING DISPLAY HANDLING TO CSS

    // player.on('canplay', vjs.bind(this, this.hide));
    // player.on('canplaythrough', vjs.bind(this, this.hide));
    // player.on('playing', vjs.bind(this, this.hide));
    // player.on('seeking', vjs.bind(this, this.show));

    // in some browsers seeking does not trigger the 'playing' event,
    // so we also need to trap 'seeked' if we are going to set a
    // 'seeking' event
    // player.on('seeked', vjs.bind(this, this.hide));

    // player.on('ended', vjs.bind(this, this.hide));

    // Not showing spinner on stalled any more. Browsers may stall and then not trigger any events that would remove the spinner.
    // Checked in Chrome 16 and Safari 5.1.2. http://help.videojs.com/discussions/problems/883-why-is-the-download-progress-showing
    // player.on('stalled', vjs.bind(this, this.show));

    // player.on('waiting', vjs.bind(this, this.show));
  }
});

vjs.LoadingSpinner.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-loading-spinner'
  });
};
/* Big Play Button
================================================================================ */
/**
 * Initial play button. Shows before the video has played. The hiding of the
 * big play button is done via CSS and player states.
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @class
 * @constructor
 */
vjs.BigPlayButton = vjs.Button.extend();

vjs.BigPlayButton.prototype.createEl = function(){
  return vjs.Button.prototype.createEl.call(this, 'div', {
    className: 'vjs-big-play-button',
    innerHTML: '<span aria-hidden="true"></span>',
    'aria-label': 'play video'
  });
};

vjs.BigPlayButton.prototype.onClick = function(){
  this.player_.play();
};
/**
 * Display that an error has occurred making the video unplayable
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @constructor
 */
vjs.ErrorDisplay = vjs.Component.extend({
  init: function(player, options){
    vjs.Component.call(this, player, options);

    this.update();
    this.on(player, 'error', this.update);
  }
});

vjs.ErrorDisplay.prototype.createEl = function(){
  var el = vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-error-display'
  });

  this.contentEl_ = vjs.createEl('div');
  el.appendChild(this.contentEl_);

  return el;
};

vjs.ErrorDisplay.prototype.update = function(){
  if (this.player().error()) {
    this.contentEl_.innerHTML = this.localize(this.player().error().message);
  }
};
(function() {
  var createTrackHelper;
/**
 * @fileoverview Media Technology Controller - Base class for media playback
 * technology controllers like Flash and HTML5
 */

/**
 * Base class for media (HTML5 Video, Flash) controllers
 * @param {vjs.Player|Object} player  Central player instance
 * @param {Object=} options Options object
 * @constructor
 */
vjs.MediaTechController = vjs.Component.extend({
  /** @constructor */
  init: function(player, options, ready){
    options = options || {};
    // we don't want the tech to report user activity automatically.
    // This is done manually in addControlsListeners
    options.reportTouchActivity = false;
    vjs.Component.call(this, player, options, ready);

    // Manually track progress in cases where the browser/flash player doesn't report it.
    if (!this['featuresProgressEvents']) {
      this.manualProgressOn();
    }

    // Manually track timeupdates in cases where the browser/flash player doesn't report it.
    if (!this['featuresTimeupdateEvents']) {
      this.manualTimeUpdatesOn();
    }

    this.initControlsListeners();

    if (!this['featuresNativeTextTracks']) {
      this.emulateTextTracks();
    }

    this.initTextTrackListeners();
  }
});

/**
 * Set up click and touch listeners for the playback element
 * On desktops, a click on the video itself will toggle playback,
 * on a mobile device a click on the video toggles controls.
 * (toggling controls is done by toggling the user state between active and
 * inactive)
 *
 * A tap can signal that a user has become active, or has become inactive
 * e.g. a quick tap on an iPhone movie should reveal the controls. Another
 * quick tap should hide them again (signaling the user is in an inactive
 * viewing state)
 *
 * In addition to this, we still want the user to be considered inactive after
 * a few seconds of inactivity.
 *
 * Note: the only part of iOS interaction we can't mimic with this setup
 * is a touch and hold on the video element counting as activity in order to
 * keep the controls showing, but that shouldn't be an issue. A touch and hold on
 * any controls will still keep the user active
 */
vjs.MediaTechController.prototype.initControlsListeners = function(){
  var player, activateControls;

  player = this.player();

  activateControls = function(){
    if (player.controls() && !player.usingNativeControls()) {
      this.addControlsListeners();
    }
  };

  // Set up event listeners once the tech is ready and has an element to apply
  // listeners to
  this.ready(activateControls);
  this.on(player, 'controlsenabled', activateControls);
  this.on(player, 'controlsdisabled', this.removeControlsListeners);

  // if we're loading the playback object after it has started loading or playing the
  // video (often with autoplay on) then the loadstart event has already fired and we
  // need to fire it manually because many things rely on it.
  // Long term we might consider how we would do this for other events like 'canplay'
  // that may also have fired.
  this.ready(function(){
    if (this.networkState && this.networkState() > 0) {
      this.player().trigger('loadstart');
    }
  });
};

vjs.MediaTechController.prototype.addControlsListeners = function(){
  var userWasActive;

  // Some browsers (Chrome & IE) don't trigger a click on a flash swf, but do
  // trigger mousedown/up.
  // http://stackoverflow.com/questions/1444562/javascript-onclick-event-over-flash-object
  // Any touch events are set to block the mousedown event from happening
  this.on('mousedown', this.onClick);

  // If the controls were hidden we don't want that to change without a tap event
  // so we'll check if the controls were already showing before reporting user
  // activity
  this.on('touchstart', function(event) {
    userWasActive = this.player_.userActive();
  });

  this.on('touchmove', function(event) {
    if (userWasActive){
      this.player().reportUserActivity();
    }
  });

  this.on('touchend', function(event) {
    // Stop the mouse events from also happening
    event.preventDefault();
  });

  // Turn on component tap events
  this.emitTapEvents();

  // The tap listener needs to come after the touchend listener because the tap
  // listener cancels out any reportedUserActivity when setting userActive(false)
  this.on('tap', this.onTap);
};

/**
 * Remove the listeners used for click and tap controls. This is needed for
 * toggling to controls disabled, where a tap/touch should do nothing.
 */
vjs.MediaTechController.prototype.removeControlsListeners = function(){
  // We don't want to just use `this.off()` because there might be other needed
  // listeners added by techs that extend this.
  this.off('tap');
  this.off('touchstart');
  this.off('touchmove');
  this.off('touchleave');
  this.off('touchcancel');
  this.off('touchend');
  this.off('click');
  this.off('mousedown');
};

/**
 * Handle a click on the media element. By default will play/pause the media.
 */
vjs.MediaTechController.prototype.onClick = function(event){
  // We're using mousedown to detect clicks thanks to Flash, but mousedown
  // will also be triggered with right-clicks, so we need to prevent that
  if (event.button !== 0) return;

  // When controls are disabled a click should not toggle playback because
  // the click is considered a control
  if (this.player().controls()) {
    if (this.player().paused()) {
      this.player().play();
    } else {
      this.player().pause();
    }
  }
};

/**
 * Handle a tap on the media element. By default it will toggle the user
 * activity state, which hides and shows the controls.
 */
vjs.MediaTechController.prototype.onTap = function(){
  this.player().userActive(!this.player().userActive());
};

/* Fallbacks for unsupported event types
================================================================================ */
// Manually trigger progress events based on changes to the buffered amount
// Many flash players and older HTML5 browsers don't send progress or progress-like events
vjs.MediaTechController.prototype.manualProgressOn = function(){
  this.manualProgress = true;

  // Trigger progress watching when a source begins loading
  this.trackProgress();
};

vjs.MediaTechController.prototype.manualProgressOff = function(){
  this.manualProgress = false;
  this.stopTrackingProgress();
};

vjs.MediaTechController.prototype.trackProgress = function(){
  this.progressInterval = this.setInterval(function(){
    // Don't trigger unless buffered amount is greater than last time

    var bufferedPercent = this.player().bufferedPercent();

    if (this.bufferedPercent_ != bufferedPercent) {
      this.player().trigger('progress');
    }

    this.bufferedPercent_ = bufferedPercent;

    if (bufferedPercent === 1) {
      this.stopTrackingProgress();
    }
  }, 500);
};
vjs.MediaTechController.prototype.stopTrackingProgress = function(){ this.clearInterval(this.progressInterval); };

/*! Time Tracking -------------------------------------------------------------- */
vjs.MediaTechController.prototype.manualTimeUpdatesOn = function(){
  var player = this.player_;

  this.manualTimeUpdates = true;

  this.on(player, 'play', this.trackCurrentTime);
  this.on(player, 'pause', this.stopTrackingCurrentTime);
  // timeupdate is also called by .currentTime whenever current time is set

  // Watch for native timeupdate event
  this.one('timeupdate', function(){
    // Update known progress support for this playback technology
    this['featuresTimeupdateEvents'] = true;
    // Turn off manual progress tracking
    this.manualTimeUpdatesOff();
  });
};

vjs.MediaTechController.prototype.manualTimeUpdatesOff = function(){
  var player = this.player_;

  this.manualTimeUpdates = false;
  this.stopTrackingCurrentTime();
  this.off(player, 'play', this.trackCurrentTime);
  this.off(player, 'pause', this.stopTrackingCurrentTime);
};

vjs.MediaTechController.prototype.trackCurrentTime = function(){
  if (this.currentTimeInterval) { this.stopTrackingCurrentTime(); }
  this.currentTimeInterval = this.setInterval(function(){
    this.player().trigger('timeupdate');
  }, 250); // 42 = 24 fps // 250 is what Webkit uses // FF uses 15
};

// Turn off play progress tracking (when paused or dragging)
vjs.MediaTechController.prototype.stopTrackingCurrentTime = function(){
  this.clearInterval(this.currentTimeInterval);

  // #1002 - if the video ends right before the next timeupdate would happen,
  // the progress bar won't make it all the way to the end
  this.player().trigger('timeupdate');
};

vjs.MediaTechController.prototype.dispose = function() {
  // Turn off any manual progress or timeupdate tracking
  if (this.manualProgress) { this.manualProgressOff(); }

  if (this.manualTimeUpdates) { this.manualTimeUpdatesOff(); }

  vjs.Component.prototype.dispose.call(this);
};

vjs.MediaTechController.prototype.setCurrentTime = function() {
  // improve the accuracy of manual timeupdates
  if (this.manualTimeUpdates) { this.player().trigger('timeupdate'); }
};

// TODO: Consider looking at moving this into the text track display directly
// https://github.com/videojs/video.js/issues/1863
vjs.MediaTechController.prototype.initTextTrackListeners = function() {
  var player = this.player_,
      tracks,
      textTrackListChanges = function() {
        var textTrackDisplay = player.getChild('textTrackDisplay'),
            controlBar;

        if (textTrackDisplay) {
          textTrackDisplay.updateDisplay();
        }
      };

  tracks = this.textTracks();

  if (!tracks) {
    return;
  }

  tracks.addEventListener('removetrack', textTrackListChanges);
  tracks.addEventListener('addtrack', textTrackListChanges);

  this.on('dispose', vjs.bind(this, function() {
    tracks.removeEventListener('removetrack', textTrackListChanges);
    tracks.removeEventListener('addtrack', textTrackListChanges);
  }));
};

vjs.MediaTechController.prototype.emulateTextTracks = function() {
  var player = this.player_,
      textTracksChanges,
      tracks,
      script;

  if (!window['WebVTT']) {
    script = document.createElement('script');
    script.src = player.options()['vtt.js'] || '../node_modules/vtt.js/dist/vtt.js';
    player.el().appendChild(script);
    window['WebVTT'] = true;
  }

  tracks = this.textTracks();
  if (!tracks) {
    return;
  }

  textTracksChanges = function() {
    var i, track, textTrackDisplay;

    textTrackDisplay = player.getChild('textTrackDisplay'),

    textTrackDisplay.updateDisplay();

    for (i = 0; i < this.length; i++) {
      track = this[i];
      track.removeEventListener('cuechange', vjs.bind(textTrackDisplay, textTrackDisplay.updateDisplay));
      if (track.mode === 'showing') {
        track.addEventListener('cuechange', vjs.bind(textTrackDisplay, textTrackDisplay.updateDisplay));
      }
    }
  };

  tracks.addEventListener('change', textTracksChanges);

  this.on('dispose', vjs.bind(this, function() {
    tracks.removeEventListener('change', textTracksChanges);
  }));
};

/**
 * Provide default methods for text tracks.
 *
 * Html5 tech overrides these.
 */

/**
 * List of associated text tracks
 * @type {Array}
 * @private
 */
vjs.MediaTechController.prototype.textTracks_;

vjs.MediaTechController.prototype.textTracks = function() {
  this.player_.textTracks_ = this.player_.textTracks_ || new vjs.TextTrackList();
  return this.player_.textTracks_;
};

vjs.MediaTechController.prototype.remoteTextTracks = function() {
  this.player_.remoteTextTracks_ = this.player_.remoteTextTracks_ || new vjs.TextTrackList();
  return this.player_.remoteTextTracks_;
};

createTrackHelper = function(self, kind, label, language, options) {
  var tracks = self.textTracks(),
      track;

  options = options || {};

  options['kind'] = kind;
  if (label) {
    options['label'] = label;
  }
  if (language) {
    options['language'] = language;
  }
  options['player'] = self.player_;

  track = new vjs.TextTrack(options);
  tracks.addTrack_(track);

  return track;
};

vjs.MediaTechController.prototype.addTextTrack = function(kind, label, language) {
  if (!kind) {
    throw new Error('TextTrack kind is required but was not provided');
  }

  return createTrackHelper(this, kind, label, language);
};

vjs.MediaTechController.prototype.addRemoteTextTrack = function(options) {
  var track = createTrackHelper(this, options['kind'], options['label'], options['language'], options);
  this.remoteTextTracks().addTrack_(track);
  return {
    track: track
  };
};

vjs.MediaTechController.prototype.removeRemoteTextTrack = function(track) {
  this.textTracks().removeTrack_(track);
  this.remoteTextTracks().removeTrack_(track);
};

/**
 * Provide a default setPoster method for techs
 *
 * Poster support for techs should be optional, so we don't want techs to
 * break if they don't have a way to set a poster.
 */
vjs.MediaTechController.prototype.setPoster = function(){};

vjs.MediaTechController.prototype['featuresVolumeControl'] = true;

// Resizing plugins using request fullscreen reloads the plugin
vjs.MediaTechController.prototype['featuresFullscreenResize'] = false;
vjs.MediaTechController.prototype['featuresPlaybackRate'] = false;

// Optional events that we can manually mimic with timers
// currently not triggered by video-js-swf
vjs.MediaTechController.prototype['featuresProgressEvents'] = false;
vjs.MediaTechController.prototype['featuresTimeupdateEvents'] = false;

vjs.MediaTechController.prototype['featuresNativeTextTracks'] = false;

/**
 * A functional mixin for techs that want to use the Source Handler pattern.
 *
 * ##### EXAMPLE:
 *
 *   videojs.MediaTechController.withSourceHandlers.call(MyTech);
 *
 */
vjs.MediaTechController.withSourceHandlers = function(Tech){
  /**
   * Register a source handler
   * Source handlers are scripts for handling specific formats.
   * The source handler pattern is used for adaptive formats (HLS, DASH) that
   * manually load video data and feed it into a Source Buffer (Media Source Extensions)
   * @param  {Function} handler  The source handler
   * @param  {Boolean}  first    Register it before any existing handlers
   */
  Tech.registerSourceHandler = function(handler, index){
    var handlers = Tech.sourceHandlers;

    if (!handlers) {
      handlers = Tech.sourceHandlers = [];
    }

    if (index === undefined) {
      // add to the end of the list
      index = handlers.length;
    }

    handlers.splice(index, 0, handler);
  };

  /**
   * Return the first source handler that supports the source
   * TODO: Answer question: should 'probably' be prioritized over 'maybe'
   * @param  {Object} source The source object
   * @returns {Object}       The first source handler that supports the source
   * @returns {null}         Null if no source handler is found
   */
  Tech.selectSourceHandler = function(source){
    var handlers = Tech.sourceHandlers || [],
        can;

    for (var i = 0; i < handlers.length; i++) {
      can = handlers[i].canHandleSource(source);

      if (can) {
        return handlers[i];
      }
    }

    return null;
  };

  /**
  * Check if the tech can support the given source
  * @param  {Object} srcObj  The source object
  * @return {String}         'probably', 'maybe', or '' (empty string)
  */
  Tech.canPlaySource = function(srcObj){
    var sh = Tech.selectSourceHandler(srcObj);

    if (sh) {
      return sh.canHandleSource(srcObj);
    }

    return '';
  };

  /**
   * Create a function for setting the source using a source object
   * and source handlers.
   * Should never be called unless a source handler was found.
   * @param {Object} source  A source object with src and type keys
   * @return {vjs.MediaTechController} self
   */
  Tech.prototype.setSource = function(source){
    var sh = Tech.selectSourceHandler(source);

    if (!sh) {
      // Fall back to a native source hander when unsupported sources are
      // deliberately set
      if (Tech.nativeSourceHandler) {
        sh = Tech.nativeSourceHandler;
      } else {
        vjs.log.error('No source hander found for the current source.');
      }
    }

    // Dispose any existing source handler
    this.disposeSourceHandler();
    this.off('dispose', this.disposeSourceHandler);

    this.currentSource_ = source;
    this.sourceHandler_ = sh.handleSource(source, this);
    this.on('dispose', this.disposeSourceHandler);

    return this;
  };

  /**
   * Clean up any existing source handler
   */
  Tech.prototype.disposeSourceHandler = function(){
    if (this.sourceHandler_ && this.sourceHandler_.dispose) {
      this.sourceHandler_.dispose();
    }
  };

};

vjs.media = {};

})();
/**
 * @fileoverview HTML5 Media Controller - Wrapper for HTML5 Media API
 */

/**
 * HTML5 Media Controller - Wrapper for HTML5 Media API
 * @param {vjs.Player|Object} player
 * @param {Object=} options
 * @param {Function=} ready
 * @constructor
 */
vjs.Html5 = vjs.MediaTechController.extend({
  /** @constructor */
  init: function(player, options, ready){
    var  nodes, nodesLength, i, node, nodeName, removeNodes;

    if (options['nativeCaptions'] === false || options['nativeTextTracks'] === false) {
      this['featuresNativeTextTracks'] = false;
    }

    vjs.MediaTechController.call(this, player, options, ready);

    this.setupTriggers();

    var source = options['source'];

    // Set the source if one is provided
    // 1) Check if the source is new (if not, we want to keep the original so playback isn't interrupted)
    // 2) Check to see if the network state of the tag was failed at init, and if so, reset the source
    // anyway so the error gets fired.
    if (source && (this.el_.currentSrc !== source.src || (player.tag && player.tag.initNetworkState_ === 3))) {
      this.setSource(source);
    }

    if (this.el_.hasChildNodes()) {

      nodes = this.el_.childNodes;
      nodesLength = nodes.length;
      removeNodes = [];

      while (nodesLength--) {
        node = nodes[nodesLength];
        nodeName = node.nodeName.toLowerCase();
        if (nodeName === 'track') {
          if (!this['featuresNativeTextTracks']) {
            // Empty video tag tracks so the built-in player doesn't use them also.
            // This may not be fast enough to stop HTML5 browsers from reading the tags
            // so we'll need to turn off any default tracks if we're manually doing
            // captions and subtitles. videoElement.textTracks
            removeNodes.push(node);
          } else {
            this.remoteTextTracks().addTrack_(node['track']);
          }
        }
      }

      for (i=0; i<removeNodes.length; i++) {
        this.el_.removeChild(removeNodes[i]);
      }
    }

    if (this['featuresNativeTextTracks']) {
      this.on('loadstart', vjs.bind(this, this.hideCaptions));
    }

    // Determine if native controls should be used
    // Our goal should be to get the custom controls on mobile solid everywhere
    // so we can remove this all together. Right now this will block custom
    // controls on touch enabled laptops like the Chrome Pixel
    if (vjs.TOUCH_ENABLED && player.options()['nativeControlsForTouch'] === true) {
      this.useNativeControls();
    }

    // Chrome and Safari both have issues with autoplay.
    // In Safari (5.1.1), when we move the video element into the container div, autoplay doesn't work.
    // In Chrome (15), if you have autoplay + a poster + no controls, the video gets hidden (but audio plays)
    // This fixes both issues. Need to wait for API, so it updates displays correctly
    player.ready(function(){
      if (this.tag && this.options_['autoplay'] && this.paused()) {
        delete this.tag['poster']; // Chrome Fix. Fixed in Chrome v16.
        this.play();
      }
    });

    this.triggerReady();
  }
});

vjs.Html5.prototype.dispose = function(){
  vjs.Html5.disposeMediaElement(this.el_);
  vjs.MediaTechController.prototype.dispose.call(this);
};

vjs.Html5.prototype.createEl = function(){
  var player = this.player_,
      track,
      trackEl,
      i,
      // If possible, reuse original tag for HTML5 playback technology element
      el = player.tag,
      attributes,
      newEl,
      clone;

  // Check if this browser supports moving the element into the box.
  // On the iPhone video will break if you move the element,
  // So we have to create a brand new element.
  if (!el || this['movingMediaElementInDOM'] === false) {

    // If the original tag is still there, clone and remove it.
    if (el) {
      clone = el.cloneNode(false);
      vjs.Html5.disposeMediaElement(el);
      el = clone;
      player.tag = null;
    } else {
      el = vjs.createEl('video');

      // determine if native controls should be used
      attributes = videojs.util.mergeOptions({}, player.tagAttributes);
      if (!vjs.TOUCH_ENABLED || player.options()['nativeControlsForTouch'] !== true) {
        delete attributes.controls;
      }

      vjs.setElementAttributes(el,
        vjs.obj.merge(attributes, {
          id:player.id() + '_html5_api',
          'class':'vjs-tech'
        })
      );
    }
    // associate the player with the new tag
    el['player'] = player;

    if (player.options_.tracks) {
      for (i = 0; i < player.options_.tracks.length; i++) {
        track = player.options_.tracks[i];
        trackEl = document.createElement('track');
        trackEl.kind = track.kind;
        trackEl.label = track.label;
        trackEl.srclang = track.srclang;
        trackEl.src = track.src;
        if ('default' in track) {
          trackEl.setAttribute('default', 'default');
        }
        el.appendChild(trackEl);
      }
    }

    vjs.insertFirst(el, player.el());
  }

  // Update specific tag settings, in case they were overridden
  var settingsAttrs = ['autoplay','preload','loop','muted'];
  for (i = settingsAttrs.length - 1; i >= 0; i--) {
    var attr = settingsAttrs[i];
    var overwriteAttrs = {};
    if (typeof player.options_[attr] !== 'undefined') {
      overwriteAttrs[attr] = player.options_[attr];
    }
    vjs.setElementAttributes(el, overwriteAttrs);
  }

  return el;
  // jenniisawesome = true;
};


vjs.Html5.prototype.hideCaptions = function() {
  var tracks = this.el_.querySelectorAll('track'),
      track,
      i = tracks.length,
      kinds = {
        'captions': 1,
        'subtitles': 1
      };

  while (i--) {
    track = tracks[i].track;
    if ((track && track['kind'] in kinds) &&
        (!tracks[i]['default'])) {
      track.mode = 'disabled';
    }
  }
};

// Make video events trigger player events
// May seem verbose here, but makes other APIs possible.
// Triggers removed using this.off when disposed
vjs.Html5.prototype.setupTriggers = function(){
  for (var i = vjs.Html5.Events.length - 1; i >= 0; i--) {
    this.on(vjs.Html5.Events[i], this.eventHandler);
  }
};

vjs.Html5.prototype.eventHandler = function(evt){
  // In the case of an error on the video element, set the error prop
  // on the player and let the player handle triggering the event. On
  // some platforms, error events fire that do not cause the error
  // property on the video element to be set. See #1465 for an example.
  if (evt.type == 'error' && this.error()) {
    this.player().error(this.error().code);

  // in some cases we pass the event directly to the player
  } else {
    // No need for media events to bubble up.
    evt.bubbles = false;

    this.player().trigger(evt);
  }
};

vjs.Html5.prototype.useNativeControls = function(){
  var tech, player, controlsOn, controlsOff, cleanUp;

  tech = this;
  player = this.player();

  // If the player controls are enabled turn on the native controls
  tech.setControls(player.controls());

  // Update the native controls when player controls state is updated
  controlsOn = function(){
    tech.setControls(true);
  };
  controlsOff = function(){
    tech.setControls(false);
  };
  player.on('controlsenabled', controlsOn);
  player.on('controlsdisabled', controlsOff);

  // Clean up when not using native controls anymore
  cleanUp = function(){
    player.off('controlsenabled', controlsOn);
    player.off('controlsdisabled', controlsOff);
  };
  tech.on('dispose', cleanUp);
  player.on('usingcustomcontrols', cleanUp);

  // Update the state of the player to using native controls
  player.usingNativeControls(true);
};


vjs.Html5.prototype.play = function(){ this.el_.play(); };
vjs.Html5.prototype.pause = function(){ this.el_.pause(); };
vjs.Html5.prototype.paused = function(){ return this.el_.paused; };

vjs.Html5.prototype.currentTime = function(){ return this.el_.currentTime; };
vjs.Html5.prototype.setCurrentTime = function(seconds){
  try {
    this.el_.currentTime = seconds;
  } catch(e) {
    vjs.log(e, 'Video is not ready. (Video.js)');
    // this.warning(VideoJS.warnings.videoNotReady);
  }
};

vjs.Html5.prototype.duration = function(){ return this.el_.duration || 0; };
vjs.Html5.prototype.buffered = function(){ return this.el_.buffered; };

vjs.Html5.prototype.volume = function(){ return this.el_.volume; };
vjs.Html5.prototype.setVolume = function(percentAsDecimal){ this.el_.volume = percentAsDecimal; };
vjs.Html5.prototype.muted = function(){ return this.el_.muted; };
vjs.Html5.prototype.setMuted = function(muted){ this.el_.muted = muted; };

vjs.Html5.prototype.width = function(){ return this.el_.offsetWidth; };
vjs.Html5.prototype.height = function(){ return this.el_.offsetHeight; };

vjs.Html5.prototype.supportsFullScreen = function(){
  if (typeof this.el_.webkitEnterFullScreen == 'function') {

    // Seems to be broken in Chromium/Chrome && Safari in Leopard
    if (/Android/.test(vjs.USER_AGENT) || !/Chrome|Mac OS X 10.5/.test(vjs.USER_AGENT)) {
      return true;
    }
  }
  return false;
};

vjs.Html5.prototype.enterFullScreen = function(){
  var video = this.el_;

  if ('webkitDisplayingFullscreen' in video) {
    this.one('webkitbeginfullscreen', function() {
      this.player_.isFullscreen(true);

      this.one('webkitendfullscreen', function() {
        this.player_.isFullscreen(false);
        this.player_.trigger('fullscreenchange');
      });

      this.player_.trigger('fullscreenchange');
    });
  }

  if (video.paused && video.networkState <= video.HAVE_METADATA) {
    // attempt to prime the video element for programmatic access
    // this isn't necessary on the desktop but shouldn't hurt
    this.el_.play();

    // playing and pausing synchronously during the transition to fullscreen
    // can get iOS ~6.1 devices into a play/pause loop
    this.setTimeout(function(){
      video.pause();
      video.webkitEnterFullScreen();
    }, 0);
  } else {
    video.webkitEnterFullScreen();
  }
};

vjs.Html5.prototype.exitFullScreen = function(){
  this.el_.webkitExitFullScreen();
};


vjs.Html5.prototype.src = function(src) {
  if (src === undefined) {
    return this.el_.src;
  } else {
    // Setting src through `src` instead of `setSrc` will be deprecated
    this.setSrc(src);
  }
};

vjs.Html5.prototype.setSrc = function(src) {
  this.el_.src = src;
};

vjs.Html5.prototype.load = function(){ this.el_.load(); };
vjs.Html5.prototype.currentSrc = function(){ return this.el_.currentSrc; };

vjs.Html5.prototype.poster = function(){ return this.el_.poster; };
vjs.Html5.prototype.setPoster = function(val){ this.el_.poster = val; };

vjs.Html5.prototype.preload = function(){ return this.el_.preload; };
vjs.Html5.prototype.setPreload = function(val){ this.el_.preload = val; };

vjs.Html5.prototype.autoplay = function(){ return this.el_.autoplay; };
vjs.Html5.prototype.setAutoplay = function(val){ this.el_.autoplay = val; };

vjs.Html5.prototype.controls = function(){ return this.el_.controls; };
vjs.Html5.prototype.setControls = function(val){ this.el_.controls = !!val; };

vjs.Html5.prototype.loop = function(){ return this.el_.loop; };
vjs.Html5.prototype.setLoop = function(val){ this.el_.loop = val; };

vjs.Html5.prototype.error = function(){ return this.el_.error; };
vjs.Html5.prototype.seeking = function(){ return this.el_.seeking; };
vjs.Html5.prototype.ended = function(){ return this.el_.ended; };
vjs.Html5.prototype.defaultMuted = function(){ return this.el_.defaultMuted; };

vjs.Html5.prototype.playbackRate = function(){ return this.el_.playbackRate; };
vjs.Html5.prototype.setPlaybackRate = function(val){ this.el_.playbackRate = val; };

vjs.Html5.prototype.networkState = function(){ return this.el_.networkState; };
vjs.Html5.prototype.readyState = function(){ return this.el_.readyState; };

vjs.Html5.prototype.textTracks = function() {
  if (!this['featuresNativeTextTracks']) {
    return vjs.MediaTechController.prototype.textTracks.call(this);
  }

  return this.el_.textTracks;
};
vjs.Html5.prototype.addTextTrack = function(kind, label, language) {
  if (!this['featuresNativeTextTracks']) {
    return vjs.MediaTechController.prototype.addTextTrack.call(this, kind, label, language);
  }

  return this.el_.addTextTrack(kind, label, language);
};

vjs.Html5.prototype.addRemoteTextTrack = function(options) {
  if (!this['featuresNativeTextTracks']) {
    return vjs.MediaTechController.prototype.addRemoteTextTrack.call(this, options);
  }

  var track = document.createElement('track');
  options = options || {};

  if (options['kind']) {
    track['kind'] = options['kind'];
  }
  if (options['label']) {
    track['label'] = options['label'];
  }
  if (options['language'] || options['srclang']) {
    track['srclang'] = options['language'] || options['srclang'];
  }
  if (options['default']) {
    track['default'] = options['default'];
  }
  if (options['id']) {
    track['id'] = options['id'];
  }
  if (options['src']) {
    track['src'] = options['src'];
  }

  this.el().appendChild(track);

  if (track.track['kind'] === 'metadata') {
    track['track']['mode'] = 'hidden';
  } else {
    track['track']['mode'] = 'disabled';
  }

  track['onload'] = function() {
    var tt = track['track'];
    if (track.readyState >= 2) {
      if (tt['kind'] === 'metadata' && tt['mode'] !== 'hidden') {
        tt['mode'] = 'hidden';
      } else if (tt['kind'] !== 'metadata' && tt['mode'] !== 'disabled') {
        tt['mode'] = 'disabled';
      }
      track['onload'] = null;
    }
  };

  this.remoteTextTracks().addTrack_(track.track);

  return track;
};

vjs.Html5.prototype.removeRemoteTextTrack = function(track) {
  if (!this['featuresNativeTextTracks']) {
    return vjs.MediaTechController.prototype.removeRemoteTextTrack.call(this, track);
  }

  var tracks, i;

  this.remoteTextTracks().removeTrack_(track);

  tracks = this.el()['querySelectorAll']('track');

  for (i = 0; i < tracks.length; i++) {
    if (tracks[i] === track || tracks[i]['track'] === track) {
      tracks[i]['parentNode']['removeChild'](tracks[i]);
      break;
    }
  }
};

/* HTML5 Support Testing ---------------------------------------------------- */

/**
 * Check if HTML5 video is supported by this browser/device
 * @return {Boolean}
 */
vjs.Html5.isSupported = function(){
  // IE9 with no Media Player is a LIAR! (#984)
  try {
    vjs.TEST_VID['volume'] = 0.5;
  } catch (e) {
    return false;
  }

  return !!vjs.TEST_VID.canPlayType;
};

// Add Source Handler pattern functions to this tech
vjs.MediaTechController.withSourceHandlers(vjs.Html5);

/**
 * The default native source handler.
 * This simply passes the source to the video element. Nothing fancy.
 * @param  {Object} source   The source object
 * @param  {vjs.Html5} tech  The instance of the HTML5 tech
 */
vjs.Html5.nativeSourceHandler = {};

/**
 * Check if the video element can handle the source natively
 * @param  {Object} source  The source object
 * @return {String}         'probably', 'maybe', or '' (empty string)
 */
vjs.Html5.nativeSourceHandler.canHandleSource = function(source){
  var match, ext;

  function canPlayType(type){
    // IE9 on Windows 7 without MediaPlayer throws an error here
    // https://github.com/videojs/video.js/issues/519
    try {
      return vjs.TEST_VID.canPlayType(type);
    } catch(e) {
      return '';
    }
  }

  // If a type was provided we should rely on that
  if (source.type) {
    return canPlayType(source.type);
  } else if (source.src) {
    // If no type, fall back to checking 'video/[EXTENSION]'
    match = source.src.match(/\.([^.\/\?]+)(\?[^\/]+)?$/i);
    ext = match && match[1];

    return canPlayType('video/'+ext);
  }

  return '';
};

/**
 * Pass the source to the video element
 * Adaptive source handlers will have more complicated workflows before passing
 * video data to the video element
 * @param  {Object} source    The source object
 * @param  {vjs.Html5} tech   The instance of the Html5 tech
 */
vjs.Html5.nativeSourceHandler.handleSource = function(source, tech){
  tech.setSrc(source.src);
};

/**
 * Clean up the source handler when disposing the player or switching sources..
 * (no cleanup is needed when supporting the format natively)
 */
vjs.Html5.nativeSourceHandler.dispose = function(){};

// Register the native source handler
vjs.Html5.registerSourceHandler(vjs.Html5.nativeSourceHandler);

/**
 * Check if the volume can be changed in this browser/device.
 * Volume cannot be changed in a lot of mobile devices.
 * Specifically, it can't be changed from 1 on iOS.
 * @return {Boolean}
 */
vjs.Html5.canControlVolume = function(){
  var volume =  vjs.TEST_VID.volume;
  vjs.TEST_VID.volume = (volume / 2) + 0.1;
  return volume !== vjs.TEST_VID.volume;
};

/**
 * Check if playbackRate is supported in this browser/device.
 * @return {[type]} [description]
 */
vjs.Html5.canControlPlaybackRate = function(){
  var playbackRate =  vjs.TEST_VID.playbackRate;
  vjs.TEST_VID.playbackRate = (playbackRate / 2) + 0.1;
  return playbackRate !== vjs.TEST_VID.playbackRate;
};

/**
 * Check to see if native text tracks are supported by this browser/device
 * @return {Boolean}
 */
vjs.Html5.supportsNativeTextTracks = function() {
  var supportsTextTracks;

  // Figure out native text track support
  // If mode is a number, we cannot change it because it'll disappear from view.
  // Browsers with numeric modes include IE10 and older (<=2013) samsung android models.
  // Firefox isn't playing nice either with modifying the mode
  // TODO: Investigate firefox: https://github.com/videojs/video.js/issues/1862
  supportsTextTracks = !!vjs.TEST_VID.textTracks;
  if (supportsTextTracks && vjs.TEST_VID.textTracks.length > 0) {
    supportsTextTracks = typeof vjs.TEST_VID.textTracks[0]['mode'] !== 'number';
  }
  if (supportsTextTracks && vjs.IS_FIREFOX) {
    supportsTextTracks = false;
  }

  return supportsTextTracks;
};

/**
 * Set the tech's volume control support status
 * @type {Boolean}
 */
vjs.Html5.prototype['featuresVolumeControl'] = vjs.Html5.canControlVolume();

/**
 * Set the tech's playbackRate support status
 * @type {Boolean}
 */
vjs.Html5.prototype['featuresPlaybackRate'] = vjs.Html5.canControlPlaybackRate();

/**
 * Set the tech's status on moving the video element.
 * In iOS, if you move a video element in the DOM, it breaks video playback.
 * @type {Boolean}
 */
vjs.Html5.prototype['movingMediaElementInDOM'] = !vjs.IS_IOS;

/**
 * Set the the tech's fullscreen resize support status.
 * HTML video is able to automatically resize when going to fullscreen.
 * (No longer appears to be used. Can probably be removed.)
 */
vjs.Html5.prototype['featuresFullscreenResize'] = true;

/**
 * Set the tech's progress event support status
 * (this disables the manual progress events of the MediaTechController)
 */
vjs.Html5.prototype['featuresProgressEvents'] = true;

/**
 * Sets the tech's status on native text track support
 * @type {Boolean}
 */
vjs.Html5.prototype['featuresNativeTextTracks'] = vjs.Html5.supportsNativeTextTracks();

// HTML5 Feature detection and Device Fixes --------------------------------- //
(function() {
  var canPlayType,
      mpegurlRE = /^application\/(?:x-|vnd\.apple\.)mpegurl/i,
      mp4RE = /^video\/mp4/i;

  vjs.Html5.patchCanPlayType = function() {
    // Android 4.0 and above can play HLS to some extent but it reports being unable to do so
    if (vjs.ANDROID_VERSION >= 4.0) {
      if (!canPlayType) {
        canPlayType = vjs.TEST_VID.constructor.prototype.canPlayType;
      }

      vjs.TEST_VID.constructor.prototype.canPlayType = function(type) {
        if (type && mpegurlRE.test(type)) {
          return 'maybe';
        }
        return canPlayType.call(this, type);
      };
    }

    // Override Android 2.2 and less canPlayType method which is broken
    if (vjs.IS_OLD_ANDROID) {
      if (!canPlayType) {
        canPlayType = vjs.TEST_VID.constructor.prototype.canPlayType;
      }

      vjs.TEST_VID.constructor.prototype.canPlayType = function(type){
        if (type && mp4RE.test(type)) {
          return 'maybe';
        }
        return canPlayType.call(this, type);
      };
    }
  };

  vjs.Html5.unpatchCanPlayType = function() {
    var r = vjs.TEST_VID.constructor.prototype.canPlayType;
    vjs.TEST_VID.constructor.prototype.canPlayType = canPlayType;
    canPlayType = null;
    return r;
  };

  // by default, patch the video element
  vjs.Html5.patchCanPlayType();
})();

// List of all HTML5 events (various uses).
vjs.Html5.Events = 'loadstart,suspend,abort,error,emptied,stalled,loadedmetadata,loadeddata,canplay,canplaythrough,playing,waiting,seeking,seeked,ended,durationchange,timeupdate,progress,play,pause,ratechange,volumechange'.split(',');

vjs.Html5.disposeMediaElement = function(el){
  if (!el) { return; }

  el['player'] = null;

  if (el.parentNode) {
    el.parentNode.removeChild(el);
  }

  // remove any child track or source nodes to prevent their loading
  while(el.hasChildNodes()) {
    el.removeChild(el.firstChild);
  }

  // remove any src reference. not setting `src=''` because that causes a warning
  // in firefox
  el.removeAttribute('src');

  // force the media element to update its loading state by calling load()
  // however IE on Windows 7N has a bug that throws an error so need a try/catch (#793)
  if (typeof el.load === 'function') {
    // wrapping in an iife so it's not deoptimized (#1060#discussion_r10324473)
    (function() {
      try {
        el.load();
      } catch (e) {
        // not supported
      }
    })();
  }
};
/**
 * @fileoverview VideoJS-SWF - Custom Flash Player with HTML5-ish API
 * https://github.com/zencoder/video-js-swf
 * Not using setupTriggers. Using global onEvent func to distribute events
 */

/**
 * Flash Media Controller - Wrapper for fallback SWF API
 *
 * @param {vjs.Player} player
 * @param {Object=} options
 * @param {Function=} ready
 * @constructor
 */
vjs.Flash = vjs.MediaTechController.extend({
  /** @constructor */
  init: function(player, options, ready){
    vjs.MediaTechController.call(this, player, options, ready);

    var source = options['source'],

        // Which element to embed in
        parentEl = options['parentEl'],

        // Create a temporary element to be replaced by swf object
        placeHolder = this.el_ = vjs.createEl('div', { id: player.id() + '_temp_flash' }),

        // Generate ID for swf object
        objId = player.id()+'_flash_api',

        // Store player options in local var for optimization
        // TODO: switch to using player methods instead of options
        // e.g. player.autoplay();
        playerOptions = player.options_,

        // Merge default flashvars with ones passed in to init
        flashVars = vjs.obj.merge({

          // SWF Callback Functions
          'readyFunction': 'videojs.Flash.onReady',
          'eventProxyFunction': 'videojs.Flash.onEvent',
          'errorEventProxyFunction': 'videojs.Flash.onError',

          // Player Settings
          'autoplay': playerOptions.autoplay,
          'preload': playerOptions.preload,
          'loop': playerOptions.loop,
          'muted': playerOptions.muted

        }, options['flashVars']),

        // Merge default parames with ones passed in
        params = vjs.obj.merge({
          'wmode': 'opaque', // Opaque is needed to overlay controls, but can affect playback performance
          'bgcolor': '#000000' // Using bgcolor prevents a white flash when the object is loading
        }, options['params']),

        // Merge default attributes with ones passed in
        attributes = vjs.obj.merge({
          'id': objId,
          'name': objId, // Both ID and Name needed or swf to identify itself
          'class': 'vjs-tech'
        }, options['attributes'])
    ;

    // If source was supplied pass as a flash var.
    if (source) {
      this.ready(function(){
        this.setSource(source);
      });
    }

    // Add placeholder to player div
    vjs.insertFirst(placeHolder, parentEl);

    // Having issues with Flash reloading on certain page actions (hide/resize/fullscreen) in certain browsers
    // This allows resetting the playhead when we catch the reload
    if (options['startTime']) {
      this.ready(function(){
        this.load();
        this.play();
        this['currentTime'](options['startTime']);
      });
    }

    // firefox doesn't bubble mousemove events to parent. videojs/video-js-swf#37
    // bugzilla bug: https://bugzilla.mozilla.org/show_bug.cgi?id=836786
    if (vjs.IS_FIREFOX) {
      this.ready(function(){
        this.on('mousemove', function(){
          // since it's a custom event, don't bubble higher than the player
          this.player().trigger({ 'type':'mousemove', 'bubbles': false });
        });
      });
    }

    // native click events on the SWF aren't triggered on IE11, Win8.1RT
    // use stageclick events triggered from inside the SWF instead
    player.on('stageclick', player.reportUserActivity);

    this.el_ = vjs.Flash.embed(options['swf'], placeHolder, flashVars, params, attributes);
  }
});

vjs.Flash.prototype.dispose = function(){
  vjs.MediaTechController.prototype.dispose.call(this);
};

vjs.Flash.prototype.play = function(){
  this.el_.vjs_play();
};

vjs.Flash.prototype.pause = function(){
  this.el_.vjs_pause();
};

vjs.Flash.prototype.src = function(src){
  if (src === undefined) {
    return this['currentSrc']();
  }

  // Setting src through `src` not `setSrc` will be deprecated
  return this.setSrc(src);
};

vjs.Flash.prototype.setSrc = function(src){
  // Make sure source URL is absolute.
  src = vjs.getAbsoluteURL(src);
  this.el_.vjs_src(src);

  // Currently the SWF doesn't autoplay if you load a source later.
  // e.g. Load player w/ no source, wait 2s, set src.
  if (this.player_.autoplay()) {
    var tech = this;
    this.setTimeout(function(){ tech.play(); }, 0);
  }
};

vjs.Flash.prototype['setCurrentTime'] = function(time){
  this.lastSeekTarget_ = time;
  this.el_.vjs_setProperty('currentTime', time);
  vjs.MediaTechController.prototype.setCurrentTime.call(this);
};

vjs.Flash.prototype['currentTime'] = function(time){
  // when seeking make the reported time keep up with the requested time
  // by reading the time we're seeking to
  if (this.seeking()) {
    return this.lastSeekTarget_ || 0;
  }
  return this.el_.vjs_getProperty('currentTime');
};

vjs.Flash.prototype['currentSrc'] = function(){
  if (this.currentSource_) {
    return this.currentSource_.src;
  } else {
    return this.el_.vjs_getProperty('currentSrc');
  }
};

vjs.Flash.prototype.load = function(){
  this.el_.vjs_load();
};

vjs.Flash.prototype.poster = function(){
  this.el_.vjs_getProperty('poster');
};
vjs.Flash.prototype['setPoster'] = function(){
  // poster images are not handled by the Flash tech so make this a no-op
};

vjs.Flash.prototype.buffered = function(){
  return vjs.createTimeRange(0, this.el_.vjs_getProperty('buffered'));
};

vjs.Flash.prototype.supportsFullScreen = function(){
  return false; // Flash does not allow fullscreen through javascript
};

vjs.Flash.prototype.enterFullScreen = function(){
  return false;
};

(function(){
  // Create setters and getters for attributes
  var api = vjs.Flash.prototype,
    readWrite = 'rtmpConnection,rtmpStream,preload,defaultPlaybackRate,playbackRate,autoplay,loop,mediaGroup,controller,controls,volume,muted,defaultMuted'.split(','),
    readOnly = 'error,networkState,readyState,seeking,initialTime,duration,startOffsetTime,paused,played,seekable,ended,videoTracks,audioTracks,videoWidth,videoHeight'.split(','),
    // Overridden: buffered, currentTime, currentSrc
    i;

  function createSetter(attr){
    var attrUpper = attr.charAt(0).toUpperCase() + attr.slice(1);
    api['set'+attrUpper] = function(val){ return this.el_.vjs_setProperty(attr, val); };
  }
  function createGetter(attr) {
    api[attr] = function(){ return this.el_.vjs_getProperty(attr); };
  }

  // Create getter and setters for all read/write attributes
  for (i = 0; i < readWrite.length; i++) {
    createGetter(readWrite[i]);
    createSetter(readWrite[i]);
  }

  // Create getters for read-only attributes
  for (i = 0; i < readOnly.length; i++) {
    createGetter(readOnly[i]);
  }
})();

/* Flash Support Testing -------------------------------------------------------- */

vjs.Flash.isSupported = function(){
  return vjs.Flash.version()[0] >= 10;
  // return swfobject.hasFlashPlayerVersion('10');
};

// Add Source Handler pattern functions to this tech
vjs.MediaTechController.withSourceHandlers(vjs.Flash);

/**
 * The default native source handler.
 * This simply passes the source to the video element. Nothing fancy.
 * @param  {Object} source   The source object
 * @param  {vjs.Flash} tech  The instance of the Flash tech
 */
vjs.Flash.nativeSourceHandler = {};

/**
 * Check Flash can handle the source natively
 * @param  {Object} source  The source object
 * @return {String}         'probably', 'maybe', or '' (empty string)
 */
vjs.Flash.nativeSourceHandler.canHandleSource = function(source){
  var type;

  if (!source.type) {
    return '';
  }

  // Strip code information from the type because we don't get that specific
  type = source.type.replace(/;.*/,'').toLowerCase();

  if (type in vjs.Flash.formats) {
    return 'maybe';
  }

  return '';
};

/**
 * Pass the source to the flash object
 * Adaptive source handlers will have more complicated workflows before passing
 * video data to the video element
 * @param  {Object} source    The source object
 * @param  {vjs.Flash} tech   The instance of the Flash tech
 */
vjs.Flash.nativeSourceHandler.handleSource = function(source, tech){
  tech.setSrc(source.src);
};

/**
 * Clean up the source handler when disposing the player or switching sources..
 * (no cleanup is needed when supporting the format natively)
 */
vjs.Flash.nativeSourceHandler.dispose = function(){};

// Register the native source handler
vjs.Flash.registerSourceHandler(vjs.Flash.nativeSourceHandler);

vjs.Flash.formats = {
  'video/flv': 'FLV',
  'video/x-flv': 'FLV',
  'video/mp4': 'MP4',
  'video/m4v': 'MP4'
};

vjs.Flash['onReady'] = function(currSwf){
  var el, player;

  el = vjs.el(currSwf);

  // get player from the player div property
  player = el && el.parentNode && el.parentNode['player'];

  // if there is no el or player then the tech has been disposed
  // and the tech element was removed from the player div
  if (player) {
    // reference player on tech element
    el['player'] = player;
    // check that the flash object is really ready
    vjs.Flash['checkReady'](player.tech);
  }
};

// The SWF isn't always ready when it says it is. Sometimes the API functions still need to be added to the object.
// If it's not ready, we set a timeout to check again shortly.
vjs.Flash['checkReady'] = function(tech){
  // stop worrying if the tech has been disposed
  if (!tech.el()) {
    return;
  }

  // check if API property exists
  if (tech.el().vjs_getProperty) {
    // tell tech it's ready
    tech.triggerReady();
  } else {
    // wait longer
    this.setTimeout(function(){
      vjs.Flash['checkReady'](tech);
    }, 50);
  }
};

// Trigger events from the swf on the player
vjs.Flash['onEvent'] = function(swfID, eventName){
  var player = vjs.el(swfID)['player'];
  player.trigger(eventName);
};

// Log errors from the swf
vjs.Flash['onError'] = function(swfID, err){
  var player = vjs.el(swfID)['player'];
  var msg = 'FLASH: '+err;

  if (err == 'srcnotfound') {
    player.error({ code: 4, message: msg });

  // errors we haven't categorized into the media errors
  } else {
    player.error(msg);
  }
};

// Flash Version Check
vjs.Flash.version = function(){
  var version = '0,0,0';

  // IE
  try {
    version = new window.ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version').replace(/\D+/g, ',').match(/^,?(.+),?$/)[1];

  // other browsers
  } catch(e) {
    try {
      if (navigator.mimeTypes['application/x-shockwave-flash'].enabledPlugin){
        version = (navigator.plugins['Shockwave Flash 2.0'] || navigator.plugins['Shockwave Flash']).description.replace(/\D+/g, ',').match(/^,?(.+),?$/)[1];
      }
    } catch(err) {}
  }
  return version.split(',');
};

// Flash embedding method. Only used in non-iframe mode
vjs.Flash.embed = function(swf, placeHolder, flashVars, params, attributes){
  var code = vjs.Flash.getEmbedCode(swf, flashVars, params, attributes),

      // Get element by embedding code and retrieving created element
      obj = vjs.createEl('div', { innerHTML: code }).childNodes[0],

      par = placeHolder.parentNode
  ;

  placeHolder.parentNode.replaceChild(obj, placeHolder);

  // IE6 seems to have an issue where it won't initialize the swf object after injecting it.
  // This is a dumb fix
  var newObj = par.childNodes[0];
  setTimeout(function(){
    newObj.style.display = 'block';
  }, 1000);

  return obj;

};

vjs.Flash.getEmbedCode = function(swf, flashVars, params, attributes){

  var objTag = '<object type="application/x-shockwave-flash" ',
      flashVarsString = '',
      paramsString = '',
      attrsString = '';

  // Convert flash vars to string
  if (flashVars) {
    vjs.obj.each(flashVars, function(key, val){
      flashVarsString += (key + '=' + val + '&amp;');
    });
  }

  // Add swf, flashVars, and other default params
  params = vjs.obj.merge({
    'movie': swf,
    'flashvars': flashVarsString,
    'allowScriptAccess': 'always', // Required to talk to swf
    'allowNetworking': 'all' // All should be default, but having security issues.
  }, params);

  // Create param tags string
  vjs.obj.each(params, function(key, val){
    paramsString += '<param name="'+key+'" value="'+val+'" />';
  });

  attributes = vjs.obj.merge({
    // Add swf to attributes (need both for IE and Others to work)
    'data': swf,

    // Default to 100% width/height
    'width': '100%',
    'height': '100%'

  }, attributes);

  // Create Attributes string
  vjs.obj.each(attributes, function(key, val){
    attrsString += (key + '="' + val + '" ');
  });

  return objTag + attrsString + '>' + paramsString + '</object>';
};
vjs.Flash.streamingFormats = {
  'rtmp/mp4': 'MP4',
  'rtmp/flv': 'FLV'
};

vjs.Flash.streamFromParts = function(connection, stream) {
  return connection + '&' + stream;
};

vjs.Flash.streamToParts = function(src) {
  var parts = {
    connection: '',
    stream: ''
  };

  if (! src) {
    return parts;
  }

  // Look for the normal URL separator we expect, '&'.
  // If found, we split the URL into two pieces around the
  // first '&'.
  var connEnd = src.indexOf('&');
  var streamBegin;
  if (connEnd !== -1) {
    streamBegin = connEnd + 1;
  }
  else {
    // If there's not a '&', we use the last '/' as the delimiter.
    connEnd = streamBegin = src.lastIndexOf('/') + 1;
    if (connEnd === 0) {
      // really, there's not a '/'?
      connEnd = streamBegin = src.length;
    }
  }
  parts.connection = src.substring(0, connEnd);
  parts.stream = src.substring(streamBegin, src.length);

  return parts;
};

vjs.Flash.isStreamingType = function(srcType) {
  return srcType in vjs.Flash.streamingFormats;
};

// RTMP has four variations, any string starting
// with one of these protocols should be valid
vjs.Flash.RTMP_RE = /^rtmp[set]?:\/\//i;

vjs.Flash.isStreamingSrc = function(src) {
  return vjs.Flash.RTMP_RE.test(src);
};

/**
 * A source handler for RTMP urls
 * @type {Object}
 */
vjs.Flash.rtmpSourceHandler = {};

/**
 * Check Flash can handle the source natively
 * @param  {Object} source  The source object
 * @return {String}         'probably', 'maybe', or '' (empty string)
 */
vjs.Flash.rtmpSourceHandler.canHandleSource = function(source){
  if (vjs.Flash.isStreamingType(source.type) || vjs.Flash.isStreamingSrc(source.src)) {
    return 'maybe';
  }

  return '';
};

/**
 * Pass the source to the flash object
 * Adaptive source handlers will have more complicated workflows before passing
 * video data to the video element
 * @param  {Object} source    The source object
 * @param  {vjs.Flash} tech   The instance of the Flash tech
 */
vjs.Flash.rtmpSourceHandler.handleSource = function(source, tech){
  var srcParts = vjs.Flash.streamToParts(source.src);

  tech['setRtmpConnection'](srcParts.connection);
  tech['setRtmpStream'](srcParts.stream);
};

// Register the native source handler
vjs.Flash.registerSourceHandler(vjs.Flash.rtmpSourceHandler);
/**
 * The Media Loader is the component that decides which playback technology to load
 * when the player is initialized.
 *
 * @constructor
 */
vjs.MediaLoader = vjs.Component.extend({
  /** @constructor */
  init: function(player, options, ready){
    vjs.Component.call(this, player, options, ready);

    // If there are no sources when the player is initialized,
    // load the first supported playback technology.
    if (!player.options_['sources'] || player.options_['sources'].length === 0) {
      for (var i=0,j=player.options_['techOrder']; i<j.length; i++) {
        var techName = vjs.capitalize(j[i]),
            tech = window['videojs'][techName];

        // Check if the browser supports this technology
        if (tech && tech.isSupported()) {
          player.loadTech(techName);
          break;
        }
      }
    } else {
      // // Loop through playback technologies (HTML5, Flash) and check for support.
      // // Then load the best source.
      // // A few assumptions here:
      // //   All playback technologies respect preload false.
      player.src(player.options_['sources']);
    }
  }
});
/*
 * https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackmode
 *
 * enum TextTrackMode { "disabled",  "hidden",  "showing" };
 */
vjs.TextTrackMode = {
  'disabled': 'disabled',
  'hidden': 'hidden',
  'showing': 'showing'
};

/*
 * https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackkind
 *
 * enum TextTrackKind { "subtitles",  "captions",  "descriptions",  "chapters",  "metadata" };
 */
vjs.TextTrackKind = {
  'subtitles': 'subtitles',
  'captions': 'captions',
  'descriptions': 'descriptions',
  'chapters': 'chapters',
  'metadata': 'metadata'
};
(function() {
/*
 * https://html.spec.whatwg.org/multipage/embedded-content.html#texttrack
 *
 * interface TextTrack : EventTarget {
 *   readonly attribute TextTrackKind kind;
 *   readonly attribute DOMString label;
 *   readonly attribute DOMString language;
 *
 *   readonly attribute DOMString id;
 *   readonly attribute DOMString inBandMetadataTrackDispatchType;
 *
 *   attribute TextTrackMode mode;
 *
 *   readonly attribute TextTrackCueList? cues;
 *   readonly attribute TextTrackCueList? activeCues;
 *
 *   void addCue(TextTrackCue cue);
 *   void removeCue(TextTrackCue cue);
 *
 *   attribute EventHandler oncuechange;
 * };
 */

vjs.TextTrack = function(options) {
  var tt, id, mode, kind, label, language, cues, activeCues, timeupdateHandler, changed, prop;

  options = options || {};

  if (!options['player']) {
    throw new Error('A player was not provided.');
  }

  tt = this;
  if (vjs.IS_IE8) {
    tt = document.createElement('custom');

    for (prop in vjs.TextTrack.prototype) {
      tt[prop] = vjs.TextTrack.prototype[prop];
    }
  }

  tt.player_ = options['player'];

  mode = vjs.TextTrackMode[options['mode']] || 'disabled';
  kind = vjs.TextTrackKind[options['kind']] || 'subtitles';
  label = options['label'] || '';
  language = options['language'] || options['srclang'] || '';
  id = options['id'] || 'vjs_text_track_' + vjs.guid++;

  if (kind === 'metadata' || kind === 'chapters') {
    mode = 'hidden';
  }

  tt.cues_ = [];
  tt.activeCues_ = [];

  cues = new vjs.TextTrackCueList(tt.cues_);
  activeCues = new vjs.TextTrackCueList(tt.activeCues_);

  changed = false;
  timeupdateHandler = vjs.bind(tt, function() {
    this['activeCues'];
    if (changed) {
      this['trigger']('cuechange');
      changed = false;
    }
  });
  if (mode !== 'disabled') {
    tt.player_.on('timeupdate', timeupdateHandler);
  }

  Object.defineProperty(tt, 'kind', {
    get: function() {
      return kind;
    },
    set: Function.prototype
  });

  Object.defineProperty(tt, 'label', {
    get: function() {
      return label;
    },
    set: Function.prototype
  });

  Object.defineProperty(tt, 'language', {
    get: function() {
      return language;
    },
    set: Function.prototype
  });

  Object.defineProperty(tt, 'id', {
    get: function() {
      return id;
    },
    set: Function.prototype
  });

  Object.defineProperty(tt, 'mode', {
    get: function() {
      return mode;
    },
    set: function(newMode) {
      if (!vjs.TextTrackMode[newMode]) {
        return;
      }
      mode = newMode;
      if (mode === 'showing') {
        this.player_.on('timeupdate', timeupdateHandler);
      }
      this.trigger('modechange');
    }
  });

  Object.defineProperty(tt, 'cues', {
    get: function() {
      if (!this.loaded_) {
        return null;
      }

      return cues;
    },
    set: Function.prototype
  });

  Object.defineProperty(tt, 'activeCues', {
    get: function() {
      var i, l, active, ct, cue;

      if (!this.loaded_) {
        return null;
      }

      if (this['cues'].length === 0) {
        return activeCues; // nothing to do
      }

      ct = this.player_.currentTime();
      i = 0;
      l = this['cues'].length;
      active = [];

      for (; i < l; i++) {
        cue = this['cues'][i];
        if (cue['startTime'] <= ct && cue['endTime'] >= ct) {
          active.push(cue);
        } else if (cue['startTime'] === cue['endTime'] && cue['startTime'] <= ct && cue['startTime'] + 0.5 >= ct) {
          active.push(cue);
        }
      }

      changed = false;

      if (active.length !== this.activeCues_.length) {
        changed = true;
      } else {
        for (i = 0; i < active.length; i++) {
          if (indexOf.call(this.activeCues_, active[i]) === -1) {
            changed = true;
          }
        }
      }

      this.activeCues_ = active;
      activeCues.setCues_(this.activeCues_);

      return activeCues;
    },
    set: Function.prototype
  });

  if (options.src) {
    loadTrack(options.src, tt);
  } else {
    tt.loaded_ = true;
  }

  if (vjs.IS_IE8) {
    return tt;
  }
};

vjs.TextTrack.prototype = vjs.obj.create(vjs.EventEmitter.prototype);
vjs.TextTrack.prototype.constructor = vjs.TextTrack;

/*
 * cuechange - One or more cues in the track have become active or stopped being active.
 */
vjs.TextTrack.prototype.allowedEvents_ = {
  'cuechange': 'cuechange'
};

vjs.TextTrack.prototype.addCue = function(cue) {
  var tracks = this.player_.textTracks(),
      i = 0;

  if (tracks) {
    for (; i < tracks.length; i++) {
      if (tracks[i] !== this) {
        tracks[i].removeCue(cue);
      }
    }
  }

  this.cues_.push(cue);
  this['cues'].setCues_(this.cues_);
};

vjs.TextTrack.prototype.removeCue = function(removeCue) {
  var i = 0,
      l = this.cues_.length,
      cue,
      removed = false;

  for (; i < l; i++) {
    cue = this.cues_[i];
    if (cue === removeCue) {
      this.cues_.splice(i, 1);
      removed = true;
    }
  }

  if (removed) {
    this.cues.setCues_(this.cues_);
  }
};

/*
 * Downloading stuff happens below this point
 */
var loadTrack, parseCues, indexOf;

loadTrack = function(src, track) {
  vjs.xhr(src, vjs.bind(this, function(err, response, responseBody){
    if (err) {
      return vjs.log.error(err);
    }


    track.loaded_ = true;
    parseCues(responseBody, track);
  }));
};

parseCues = function(srcContent, track) {
  if (typeof window['WebVTT'] !== 'function') {
    //try again a bit later
    return window.setTimeout(function() {
      parseCues(srcContent, track);
    }, 25);
  }

  var parser = new window['WebVTT']['Parser'](window, window['vttjs'], window['WebVTT']['StringDecoder']());

  parser['oncue'] = function(cue) {
    track.addCue(cue);
  };
  parser['onparsingerror'] = function(error) {
    vjs.log.error(error);
  };

  parser['parse'](srcContent);
  parser['flush']();
};

indexOf = function(searchElement, fromIndex) {

  var k;

  if (this == null) {
    throw new TypeError('"this" is null or not defined');
  }

  var O = Object(this);

  var len = O.length >>> 0;

  if (len === 0) {
    return -1;
  }

  var n = +fromIndex || 0;

  if (Math.abs(n) === Infinity) {
    n = 0;
  }

  if (n >= len) {
    return -1;
  }

  k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);

  while (k < len) {
    if (k in O && O[k] === searchElement) {
      return k;
    }
    k++;
  }
  return -1;
};

})();
/*
 * https://html.spec.whatwg.org/multipage/embedded-content.html#texttracklist
 *
 * interface TextTrackList : EventTarget {
 *   readonly attribute unsigned long length;
 *   getter TextTrack (unsigned long index);
 *   TextTrack? getTrackById(DOMString id);
 * 
 *   attribute EventHandler onchange;
 *   attribute EventHandler onaddtrack;
 *   attribute EventHandler onremovetrack;
 * };
 */
vjs.TextTrackList = function(tracks) {
  var list = this,
      prop,
      i = 0;

  if (vjs.IS_IE8) {
    list = document.createElement('custom');

    for (prop in vjs.TextTrackList.prototype) {
      list[prop] = vjs.TextTrackList.prototype[prop];
    }
  }

  tracks = tracks || [];
  list.tracks_ = [];

  Object.defineProperty(list, 'length', {
    get: function() {
      return this.tracks_.length;
    }
  });

  for (; i < tracks.length; i++) {
    list.addTrack_(tracks[i]);
  }

  if (vjs.IS_IE8) {
    return list;
  }
};

vjs.TextTrackList.prototype = vjs.obj.create(vjs.EventEmitter.prototype);
vjs.TextTrackList.prototype.constructor = vjs.TextTrackList;

/*
 * change - One or more tracks in the track list have been enabled or disabled.
 * addtrack - A track has been added to the track list.
 * removetrack - A track has been removed from the track list.
*/
vjs.TextTrackList.prototype.allowedEvents_ = {
  'change': 'change',
  'addtrack': 'addtrack',
  'removetrack': 'removetrack'
};

// emulate attribute EventHandler support to allow for feature detection
(function() {
  var event;

  for (event in vjs.TextTrackList.prototype.allowedEvents_) {
    vjs.TextTrackList.prototype['on' + event] = null;
  }
})();

vjs.TextTrackList.prototype.addTrack_ = function(track) {
  var index = this.tracks_.length;
  if (!(''+index in this)) {
    Object.defineProperty(this, index, {
      get: function() {
        return this.tracks_[index];
      }
    });
  }

  track.addEventListener('modechange', vjs.bind(this, function() {
    this.trigger('change');
  }));
  this.tracks_.push(track);

  this.trigger({
    type: 'addtrack',
    track: track
  });
};

vjs.TextTrackList.prototype.removeTrack_ = function(rtrack) {
  var i = 0,
      l = this.length,
      result = null,
      track;

  for (; i < l; i++) {
    track = this[i];
    if (track === rtrack) {
      this.tracks_.splice(i, 1);
      break;
    }
  }

  this.trigger({
    type: 'removetrack',
    track: rtrack
  });
};

vjs.TextTrackList.prototype.getTrackById = function(id) {
  var i = 0,
      l = this.length,
      result = null,
      track;

  for (; i < l; i++) {
    track = this[i];
    if (track.id === id) {
      result = track;
      break;
    }
  }

  return result;
};
/*
 * https://html.spec.whatwg.org/multipage/embedded-content.html#texttrackcuelist
 *
 * interface TextTrackCueList {
 *   readonly attribute unsigned long length;
 *   getter TextTrackCue (unsigned long index);
 *   TextTrackCue? getCueById(DOMString id);
 * };
 */

vjs.TextTrackCueList = function(cues) {
  var list = this,
      prop;

  if (vjs.IS_IE8) {
    list = document.createElement('custom');

    for (prop in vjs.TextTrackCueList.prototype) {
      list[prop] = vjs.TextTrackCueList.prototype[prop];
    }
  }

  vjs.TextTrackCueList.prototype.setCues_.call(list, cues);

  Object.defineProperty(list, 'length', {
    get: function() {
      return this.length_;
    }
  });

  if (vjs.IS_IE8) {
    return list;
  }
};

vjs.TextTrackCueList.prototype.setCues_ = function(cues) {
  var oldLength = this.length || 0,
      i = 0,
      l = cues.length,
      defineProp;

  this.cues_ = cues;
  this.length_ = cues.length;

  defineProp = function(i) {
    if (!(''+i in this)) {
      Object.defineProperty(this, '' + i, {
        get: function() {
          return this.cues_[i];
        }
      });
    }
  };

  if (oldLength < l) {
    i = oldLength;
    for(; i < l; i++) {
      defineProp.call(this, i);
    }
  }
};

vjs.TextTrackCueList.prototype.getCueById = function(id) {
  var i = 0,
      l = this.length,
      result = null,
      cue;

  for (; i < l; i++) {
    cue = this[i];
    if (cue.id === id) {
      result = cue;
      break;
    }
  }

  return result;
};
(function() {
'use strict';

/* Text Track Display
============================================================================= */
// Global container for both subtitle and captions text. Simple div container.

/**
 * The component for displaying text track cues
 *
 * @constructor
 */
vjs.TextTrackDisplay = vjs.Component.extend({
  /** @constructor */
  init: function(player, options, ready){
    vjs.Component.call(this, player, options, ready);

    player.on('loadstart', vjs.bind(this, this.toggleDisplay));

    // This used to be called during player init, but was causing an error
    // if a track should show by default and the display hadn't loaded yet.
    // Should probably be moved to an external track loader when we support
    // tracks that don't need a display.
    player.ready(vjs.bind(this, function() {
      if (player.tech && player.tech['featuresNativeTextTracks']) {
        this.hide();
        return;
      }

      var i, tracks, track;

      player.on('fullscreenchange', vjs.bind(this, this.updateDisplay));

      tracks = player.options_['tracks'] || [];
      for (i = 0; i < tracks.length; i++) {
        track = tracks[i];
        this.player_.addRemoteTextTrack(track);
      }
    }));
  }
});

vjs.TextTrackDisplay.prototype.toggleDisplay = function() {
  if (this.player_.tech && this.player_.tech['featuresNativeTextTracks']) {
    this.hide();
  } else {
    this.show();
  }
};

vjs.TextTrackDisplay.prototype.createEl = function(){
  return vjs.Component.prototype.createEl.call(this, 'div', {
    className: 'vjs-text-track-display'
  });
};

vjs.TextTrackDisplay.prototype.clearDisplay = function() {
  if (typeof window['WebVTT'] === 'function') {
    window['WebVTT']['processCues'](window, [], this.el_);
  }
};

// Add cue HTML to display
var constructColor = function(color, opacity) {
  return 'rgba(' +
    // color looks like "#f0e"
    parseInt(color[1] + color[1], 16) + ',' +
    parseInt(color[2] + color[2], 16) + ',' +
    parseInt(color[3] + color[3], 16) + ',' +
    opacity + ')';
};
var darkGray = '#222';
var lightGray = '#ccc';
var fontMap = {
  monospace:             'monospace',
  sansSerif:             'sans-serif',
  serif:                 'serif',
  monospaceSansSerif:    '"Andale Mono", "Lucida Console", monospace',
  monospaceSerif:        '"Courier New", monospace',
  proportionalSansSerif: 'sans-serif',
  proportionalSerif:     'serif',
  casual:                '"Comic Sans MS", Impact, fantasy',
  script:                '"Monotype Corsiva", cursive',
  smallcaps:             '"Andale Mono", "Lucida Console", monospace, sans-serif'
};
var tryUpdateStyle = function(el, style, rule) {
  // some style changes will throw an error, particularly in IE8. Those should be noops.
  try {
    el.style[style] = rule;
  } catch (e) {}
};

vjs.TextTrackDisplay.prototype.updateDisplay = function() {
  var tracks = this.player_.textTracks(),
      i = 0,
      track;

  this.clearDisplay();

  if (!tracks) {
    return;
  }

  for (; i < tracks.length; i++) {
    track = tracks[i];
    if (track['mode'] === 'showing') {
      this.updateForTrack(track);
    }
  }
};

vjs.TextTrackDisplay.prototype.updateForTrack = function(track) {
  if (typeof window['WebVTT'] !== 'function' || !track['activeCues']) {
    return;
  }

  var i = 0,
      property,
      cueDiv,
      overrides = this.player_['textTrackSettings'].getValues(),
      fontSize,
      cues = [];

  for (; i < track['activeCues'].length; i++) {
    cues.push(track['activeCues'][i]);
  }

  window['WebVTT']['processCues'](window, track['activeCues'], this.el_);

  i = cues.length;
  while (i--) {
    cueDiv = cues[i].displayState;
    if (overrides.color) {
      cueDiv.firstChild.style.color = overrides.color;
    }
    if (overrides.textOpacity) {
      tryUpdateStyle(cueDiv.firstChild,
                     'color',
                     constructColor(overrides.color || '#fff',
                                    overrides.textOpacity));
    }
    if (overrides.backgroundColor) {
      cueDiv.firstChild.style.backgroundColor = overrides.backgroundColor;
    }
    if (overrides.backgroundOpacity) {
      tryUpdateStyle(cueDiv.firstChild,
                     'backgroundColor',
                     constructColor(overrides.backgroundColor || '#000',
                                    overrides.backgroundOpacity));
    }
    if (overrides.windowColor) {
      if (overrides.windowOpacity) {
        tryUpdateStyle(cueDiv,
                       'backgroundColor',
                       constructColor(overrides.windowColor, overrides.windowOpacity));
      } else {
        cueDiv.style.backgroundColor = overrides.windowColor;
      }
    }
    if (overrides.edgeStyle) {
      if (overrides.edgeStyle === 'dropshadow') {
        cueDiv.firstChild.style.textShadow = '2px 2px 3px ' + darkGray + ', 2px 2px 4px ' + darkGray + ', 2px 2px 5px ' + darkGray;
      } else if (overrides.edgeStyle === 'raised') {
        cueDiv.firstChild.style.textShadow = '1px 1px ' + darkGray + ', 2px 2px ' + darkGray + ', 3px 3px ' + darkGray;
      } else if (overrides.edgeStyle === 'depressed') {
        cueDiv.firstChild.style.textShadow = '1px 1px ' + lightGray + ', 0 1px ' + lightGray + ', -1px -1px ' + darkGray + ', 0 -1px ' + darkGray;
      } else if (overrides.edgeStyle === 'uniform') {
        cueDiv.firstChild.style.textShadow = '0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray + ', 0 0 4px ' + darkGray;
      }
    }
    if (overrides.fontPercent && overrides.fontPercent !== 1) {
      fontSize = window.parseFloat(cueDiv.style.fontSize);
      cueDiv.style.fontSize = (fontSize * overrides.fontPercent) + 'px';
      cueDiv.style.height = 'auto';
      cueDiv.style.top = 'auto';
      cueDiv.style.bottom = '2px';
    }
    if (overrides.fontFamily && overrides.fontFamily !== 'default') {
      if (overrides.fontFamily === 'small-caps') {
        cueDiv.firstChild.style.fontVariant = 'small-caps';
      } else {
        cueDiv.firstChild.style.fontFamily = fontMap[overrides.fontFamily];
      }
    }
  }
};


/**
 * The specific menu item type for selecting a language within a text track kind
 *
 * @constructor
 */
vjs.TextTrackMenuItem = vjs.MenuItem.extend({
  /** @constructor */
  init: function(player, options){
    var track = this.track = options['track'],
        tracks = player.textTracks(),
        changeHandler,
        event;

    if (tracks) {
      changeHandler = vjs.bind(this, function() {
        var selected = this.track['mode'] === 'showing',
            track,
            i,
            l;

        if (this instanceof vjs.OffTextTrackMenuItem) {
          selected = true;

          i = 0,
          l = tracks.length;

          for (; i < l; i++) {
            track = tracks[i];
            if (track['kind'] === this.track['kind'] && track['mode'] === 'showing') {
              selected = false;
              break;
            }
          }
        }

        this.selected(selected);
      });
      tracks.addEventListener('change', changeHandler);
      player.on('dispose', function() {
        tracks.removeEventListener('change', changeHandler);
      });
    }

    // Modify options for parent MenuItem class's init.
    options['label'] = track['label'] || track['language'] || 'Unknown';
    options['selected'] = track['default'] || track['mode'] === 'showing';
    vjs.MenuItem.call(this, player, options);

    // iOS7 doesn't dispatch change events to TextTrackLists when an
    // associated track's mode changes. Without something like
    // Object.observe() (also not present on iOS7), it's not
    // possible to detect changes to the mode attribute and polyfill
    // the change event. As a poor substitute, we manually dispatch
    // change events whenever the controls modify the mode.
    if (tracks && tracks.onchange === undefined) {
      this.on(['tap', 'click'], function() {
        if (typeof window.Event !== 'object') {
          // Android 2.3 throws an Illegal Constructor error for window.Event
          try {
            event = new window.Event('change');
          } catch(err){}
        }

        if (!event) {
          event = document.createEvent('Event');
          event.initEvent('change', true, true);
        }

        tracks.dispatchEvent(event);
      });
    }
  }
});

vjs.TextTrackMenuItem.prototype.onClick = function(){
  var kind = this.track['kind'],
      tracks = this.player_.textTracks(),
      mode,
      track,
      i = 0;

  vjs.MenuItem.prototype.onClick.call(this);

  if (!tracks) {
    return;
  }

  for (; i < tracks.length; i++) {
    track = tracks[i];

    if (track['kind'] !== kind) {
      continue;
    }

    if (track === this.track) {
      track['mode'] = 'showing';
    } else {
      track['mode'] = 'disabled';
    }
  }
};

/**
 * A special menu item for turning of a specific type of text track
 *
 * @constructor
 */
vjs.OffTextTrackMenuItem = vjs.TextTrackMenuItem.extend({
  /** @constructor */
  init: function(player, options){
    // Create pseudo track info
    // Requires options['kind']
    options['track'] = {
      'kind': options['kind'],
      'player': player,
      'label': options['kind'] + ' off',
      'default': false,
      'mode': 'disabled'
    };
    vjs.TextTrackMenuItem.call(this, player, options);
    this.selected(true);
  }
});

vjs.CaptionSettingsMenuItem = vjs.TextTrackMenuItem.extend({
  init: function(player, options) {
    options['track'] = {
      'kind': options['kind'],
      'player': player,
      'label': options['kind'] + ' settings',
      'default': false,
      mode: 'disabled'
    };

    vjs.TextTrackMenuItem.call(this, player, options);
    this.addClass('vjs-texttrack-settings');
  }
});

vjs.CaptionSettingsMenuItem.prototype.onClick = function() {
  this.player().getChild('textTrackSettings').show();
};

/**
 * The base class for buttons that toggle specific text track types (e.g. subtitles)
 *
 * @constructor
 */
vjs.TextTrackButton = vjs.MenuButton.extend({
  /** @constructor */
  init: function(player, options){
    var tracks, updateHandler;

    vjs.MenuButton.call(this, player, options);

    tracks = this.player_.textTracks();

    if (this.items.length <= 1) {
      this.hide();
    }

    if (!tracks) {
      return;
    }

    updateHandler = vjs.bind(this, this.update);
    tracks.addEventListener('removetrack', updateHandler);
    tracks.addEventListener('addtrack', updateHandler);

    this.player_.on('dispose', function() {
      tracks.removeEventListener('removetrack', updateHandler);
      tracks.removeEventListener('addtrack', updateHandler);
    });
  }
});

// Create a menu item for each text track
vjs.TextTrackButton.prototype.createItems = function(){
  var items = [], track, tracks;

  if (this instanceof vjs.CaptionsButton && !(this.player().tech && this.player().tech['featuresNativeTextTracks'])) {
    items.push(new vjs.CaptionSettingsMenuItem(this.player_, { 'kind': this.kind_ }));
  }

  // Add an OFF menu item to turn all tracks off
  items.push(new vjs.OffTextTrackMenuItem(this.player_, { 'kind': this.kind_ }));

  tracks = this.player_.textTracks();

  if (!tracks) {
    return items;
  }

  for (var i = 0; i < tracks.length; i++) {
    track = tracks[i];

    // only add tracks that are of the appropriate kind and have a label
    if (track['kind'] === this.kind_) {
      items.push(new vjs.TextTrackMenuItem(this.player_, {
        'track': track
      }));
    }
  }

  return items;
};

/**
 * The button component for toggling and selecting captions
 *
 * @constructor
 */
vjs.CaptionsButton = vjs.TextTrackButton.extend({
  /** @constructor */
  init: function(player, options, ready){
    vjs.TextTrackButton.call(this, player, options, ready);
    this.el_.setAttribute('aria-label','Captions Menu');
  }
});
vjs.CaptionsButton.prototype.kind_ = 'captions';
vjs.CaptionsButton.prototype.buttonText = 'Captions';
vjs.CaptionsButton.prototype.className = 'vjs-captions-button';

vjs.CaptionsButton.prototype.update = function() {
  var threshold = 2;
  vjs.TextTrackButton.prototype.update.call(this);

  // if native, then threshold is 1 because no settings button
  if (this.player().tech && this.player().tech['featuresNativeTextTracks']) {
    threshold = 1;
  }

  if (this.items && this.items.length > threshold) {
    this.show();
  } else {
    this.hide();
  }
};

/**
 * The button component for toggling and selecting subtitles
 *
 * @constructor
 */
vjs.SubtitlesButton = vjs.TextTrackButton.extend({
  /** @constructor */
  init: function(player, options, ready){
    vjs.TextTrackButton.call(this, player, options, ready);
    this.el_.setAttribute('aria-label','Subtitles Menu');
  }
});
vjs.SubtitlesButton.prototype.kind_ = 'subtitles';
vjs.SubtitlesButton.prototype.buttonText = 'Subtitles';
vjs.SubtitlesButton.prototype.className = 'vjs-subtitles-button';

// Chapters act much differently than other text tracks
// Cues are navigation vs. other tracks of alternative languages
/**
 * The button component for toggling and selecting chapters
 *
 * @constructor
 */
vjs.ChaptersButton = vjs.TextTrackButton.extend({
  /** @constructor */
  init: function(player, options, ready){
    vjs.TextTrackButton.call(this, player, options, ready);
    this.el_.setAttribute('aria-label','Chapters Menu');
  }
});
vjs.ChaptersButton.prototype.kind_ = 'chapters';
vjs.ChaptersButton.prototype.buttonText = 'Chapters';
vjs.ChaptersButton.prototype.className = 'vjs-chapters-button';

// Create a menu item for each text track
vjs.ChaptersButton.prototype.createItems = function(){
  var items = [], track, tracks;

  tracks = this.player_.textTracks();

  if (!tracks) {
    return items;
  }

  for (var i = 0; i < tracks.length; i++) {
    track = tracks[i];
    if (track['kind'] === this.kind_) {
      items.push(new vjs.TextTrackMenuItem(this.player_, {
        'track': track
      }));
    }
  }

  return items;
};

vjs.ChaptersButton.prototype.createMenu = function(){
  var tracks = this.player_.textTracks() || [],
      i = 0,
      l = tracks.length,
      track, chaptersTrack,
      items = this.items = [];

  for (; i < l; i++) {
    track = tracks[i];
    if (track['kind'] == this.kind_) {
      if (!track.cues) {
        track['mode'] = 'hidden';
        /* jshint loopfunc:true */
        // TODO see if we can figure out a better way of doing this https://github.com/videojs/video.js/issues/1864
        window.setTimeout(vjs.bind(this, function() {
          this.createMenu();
        }), 100);
        /* jshint loopfunc:false */
      } else {
        chaptersTrack = track;
        break;
      }
    }
  }

  var menu = this.menu;
  if (menu === undefined) {
    menu = new vjs.Menu(this.player_);
    menu.contentEl().appendChild(vjs.createEl('li', {
      className: 'vjs-menu-title',
      innerHTML: vjs.capitalize(this.kind_),
      tabindex: -1
    }));
  }

  if (chaptersTrack) {
    var cues = chaptersTrack['cues'], cue, mi;
    i = 0;
    l = cues.length;

    for (; i < l; i++) {
      cue = cues[i];

      mi = new vjs.ChaptersTrackMenuItem(this.player_, {
        'track': chaptersTrack,
        'cue': cue
      });

      items.push(mi);

      menu.addChild(mi);
    }
    this.addChild(menu);
  }

  if (this.items.length > 0) {
    this.show();
  }

  return menu;
};


/**
 * @constructor
 */
vjs.ChaptersTrackMenuItem = vjs.MenuItem.extend({
  /** @constructor */
  init: function(player, options){
    var track = this.track = options['track'],
        cue = this.cue = options['cue'],
        currentTime = player.currentTime();

    // Modify options for parent MenuItem class's init.
    options['label'] = cue.text;
    options['selected'] = (cue['startTime'] <= currentTime && currentTime < cue['endTime']);
    vjs.MenuItem.call(this, player, options);

    track.addEventListener('cuechange', vjs.bind(this, this.update));
  }
});

vjs.ChaptersTrackMenuItem.prototype.onClick = function(){
  vjs.MenuItem.prototype.onClick.call(this);
  this.player_.currentTime(this.cue.startTime);
  this.update(this.cue.startTime);
};

vjs.ChaptersTrackMenuItem.prototype.update = function(){
  var cue = this.cue,
      currentTime = this.player_.currentTime();

  // vjs.log(currentTime, cue.startTime);
  this.selected(cue['startTime'] <= currentTime && currentTime < cue['endTime']);
};
})();
(function() {
  'use strict';

  vjs.TextTrackSettings = vjs.Component.extend({
    init: function(player, options) {
      vjs.Component.call(this, player, options);
      this.hide();

      vjs.on(this.el().querySelector('.vjs-done-button'), 'click', vjs.bind(this, function() {
        this.saveSettings();
        this.hide();
      }));

      vjs.on(this.el().querySelector('.vjs-default-button'), 'click', vjs.bind(this, function() {
        this.el().querySelector('.vjs-fg-color > select').selectedIndex = 0;
        this.el().querySelector('.vjs-bg-color > select').selectedIndex = 0;
        this.el().querySelector('.window-color > select').selectedIndex = 0;
        this.el().querySelector('.vjs-text-opacity > select').selectedIndex = 0;
        this.el().querySelector('.vjs-bg-opacity > select').selectedIndex = 0;
        this.el().querySelector('.vjs-window-opacity > select').selectedIndex = 0;
        this.el().querySelector('.vjs-edge-style select').selectedIndex = 0;
        this.el().querySelector('.vjs-font-family select').selectedIndex = 0;
        this.el().querySelector('.vjs-font-percent select').selectedIndex = 2;
        this.updateDisplay();
      }));

      vjs.on(this.el().querySelector('.vjs-fg-color > select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.vjs-bg-color > select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.window-color > select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.vjs-text-opacity > select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.vjs-bg-opacity > select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.vjs-window-opacity > select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.vjs-font-percent select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.vjs-edge-style select'), 'change', vjs.bind(this, this.updateDisplay));
      vjs.on(this.el().querySelector('.vjs-font-family select'), 'change', vjs.bind(this, this.updateDisplay));

      if (player.options()['persistTextTrackSettings']) {
        this.restoreSettings();
      }
    }
  });

  vjs.TextTrackSettings.prototype.createEl = function() {
    return vjs.Component.prototype.createEl.call(this, 'div', {
      className: 'vjs-caption-settings vjs-modal-overlay',
      innerHTML: captionOptionsMenuTemplate()
    });
  };

  vjs.TextTrackSettings.prototype.getValues = function() {
    var el, bgOpacity, textOpacity, windowOpacity, textEdge, fontFamily, fgColor, bgColor, windowColor, result, name, fontPercent;

    el = this.el();

    textEdge = getSelectedOptionValue(el.querySelector('.vjs-edge-style select'));
    fontFamily = getSelectedOptionValue(el.querySelector('.vjs-font-family select'));
    fgColor = getSelectedOptionValue(el.querySelector('.vjs-fg-color > select'));
    textOpacity = getSelectedOptionValue(el.querySelector('.vjs-text-opacity > select'));
    bgColor = getSelectedOptionValue(el.querySelector('.vjs-bg-color > select'));
    bgOpacity = getSelectedOptionValue(el.querySelector('.vjs-bg-opacity > select'));
    windowColor = getSelectedOptionValue(el.querySelector('.window-color > select'));
    windowOpacity = getSelectedOptionValue(el.querySelector('.vjs-window-opacity > select'));
    fontPercent = window['parseFloat'](getSelectedOptionValue(el.querySelector('.vjs-font-percent > select')));

    result = {
      'backgroundOpacity': bgOpacity,
      'textOpacity': textOpacity,
      'windowOpacity': windowOpacity,
      'edgeStyle': textEdge,
      'fontFamily': fontFamily,
      'color': fgColor,
      'backgroundColor': bgColor,
      'windowColor': windowColor,
      'fontPercent': fontPercent
    };
    for (name in result) {
      if (result[name] === '' || result[name] === 'none' || (name === 'fontPercent' && result[name] === 1.00)) {
        delete result[name];
      }
    }
    return result;
  };

  vjs.TextTrackSettings.prototype.setValues = function(values) {
    var el = this.el(), fontPercent;

    setSelectedOption(el.querySelector('.vjs-edge-style select'), values.edgeStyle);
    setSelectedOption(el.querySelector('.vjs-font-family select'), values.fontFamily);
    setSelectedOption(el.querySelector('.vjs-fg-color > select'), values.color);
    setSelectedOption(el.querySelector('.vjs-text-opacity > select'), values.textOpacity);
    setSelectedOption(el.querySelector('.vjs-bg-color > select'), values.backgroundColor);
    setSelectedOption(el.querySelector('.vjs-bg-opacity > select'), values.backgroundOpacity);
    setSelectedOption(el.querySelector('.window-color > select'), values.windowColor);
    setSelectedOption(el.querySelector('.vjs-window-opacity > select'), values.windowOpacity);

    fontPercent = values.fontPercent;

    if (fontPercent) {
      fontPercent = fontPercent.toFixed(2);
    }

    setSelectedOption(el.querySelector('.vjs-font-percent > select'), fontPercent);
  };

  vjs.TextTrackSettings.prototype.restoreSettings = function() {
    var values;
    try {
      values = JSON.parse(window.localStorage.getItem('vjs-text-track-settings'));
    } catch (e) {}

    if (values) {
      this.setValues(values);
    }
  };

  vjs.TextTrackSettings.prototype.saveSettings = function() {
    var values;

    if (!this.player_.options()['persistTextTrackSettings']) {
      return;
    }

    values = this.getValues();
    try {
      if (!vjs.isEmpty(values)) {
        window.localStorage.setItem('vjs-text-track-settings', JSON.stringify(values));
      } else {
        window.localStorage.removeItem('vjs-text-track-settings');
      }
    } catch (e) {}
  };

  vjs.TextTrackSettings.prototype.updateDisplay = function() {
    var ttDisplay = this.player_.getChild('textTrackDisplay');
    if (ttDisplay) {
      ttDisplay.updateDisplay();
    }
  };

  function getSelectedOptionValue(target) {
    var selectedOption;
    // not all browsers support selectedOptions, so, fallback to options
    if (target.selectedOptions) {
      selectedOption = target.selectedOptions[0];
    } else if (target.options) {
      selectedOption = target.options[target.options.selectedIndex];
    }

    return selectedOption.value;
  }

  function setSelectedOption(target, value) {
    var i, option;

    if (!value) {
      return;
    }

    for (i = 0; i < target.options.length; i++) {
      option = target.options[i];
      if (option.value === value) {
        break;
      }
    }

    target.selectedIndex = i;
  }

  function captionOptionsMenuTemplate() {
    return '<div class="vjs-tracksettings">' +
        '<div class="vjs-tracksettings-colors">' +
          '<div class="vjs-fg-color vjs-tracksetting">' +
              '<label class="vjs-label">Foreground</label>' +
              '<select>' +
                '<option value="">---</option>' +
                '<option value="#FFF">White</option>' +
                '<option value="#000">Black</option>' +
                '<option value="#F00">Red</option>' +
                '<option value="#0F0">Green</option>' +
                '<option value="#00F">Blue</option>' +
                '<option value="#FF0">Yellow</option>' +
                '<option value="#F0F">Magenta</option>' +
                '<option value="#0FF">Cyan</option>' +
              '</select>' +
              '<span class="vjs-text-opacity vjs-opacity">' +
                '<select>' +
                  '<option value="">---</option>' +
                  '<option value="1">Opaque</option>' +
                  '<option value="0.5">Semi-Opaque</option>' +
                '</select>' +
              '</span>' +
          '</div>' + // vjs-fg-color
          '<div class="vjs-bg-color vjs-tracksetting">' +
              '<label class="vjs-label">Background</label>' +
              '<select>' +
                '<option value="">---</option>' +
                '<option value="#FFF">White</option>' +
                '<option value="#000">Black</option>' +
                '<option value="#F00">Red</option>' +
                '<option value="#0F0">Green</option>' +
                '<option value="#00F">Blue</option>' +
                '<option value="#FF0">Yellow</option>' +
                '<option value="#F0F">Magenta</option>' +
                '<option value="#0FF">Cyan</option>' +
              '</select>' +
              '<span class="vjs-bg-opacity vjs-opacity">' +
                  '<select>' +
                    '<option value="">---</option>' +
                    '<option value="1">Opaque</option>' +
                    '<option value="0.5">Semi-Transparent</option>' +
                    '<option value="0">Transparent</option>' +
                  '</select>' +
              '</span>' +
          '</div>' + // vjs-bg-color
          '<div class="window-color vjs-tracksetting">' +
              '<label class="vjs-label">Window</label>' +
              '<select>' +
                '<option value="">---</option>' +
                '<option value="#FFF">White</option>' +
                '<option value="#000">Black</option>' +
                '<option value="#F00">Red</option>' +
                '<option value="#0F0">Green</option>' +
                '<option value="#00F">Blue</option>' +
                '<option value="#FF0">Yellow</option>' +
                '<option value="#F0F">Magenta</option>' +
                '<option value="#0FF">Cyan</option>' +
              '</select>' +
              '<span class="vjs-window-opacity vjs-opacity">' +
                  '<select>' +
                    '<option value="">---</option>' +
                    '<option value="1">Opaque</option>' +
                    '<option value="0.5">Semi-Transparent</option>' +
                    '<option value="0">Transparent</option>' +
                  '</select>' +
              '</span>' +
          '</div>' + // vjs-window-color
        '</div>' + // vjs-tracksettings
        '<div class="vjs-tracksettings-font">' +
          '<div class="vjs-font-percent vjs-tracksetting">' +
            '<label class="vjs-label">Font Size</label>' +
            '<select>' +
              '<option value="0.50">50%</option>' +
              '<option value="0.75">75%</option>' +
              '<option value="1.00" selected>100%</option>' +
              '<option value="1.25">125%</option>' +
              '<option value="1.50">150%</option>' +
              '<option value="1.75">175%</option>' +
              '<option value="2.00">200%</option>' +
              '<option value="3.00">300%</option>' +
              '<option value="4.00">400%</option>' +
            '</select>' +
          '</div>' + // vjs-font-percent
          '<div class="vjs-edge-style vjs-tracksetting">' +
            '<label class="vjs-label">Text Edge Style</label>' +
            '<select>' +
              '<option value="none">None</option>' +
              '<option value="raised">Raised</option>' +
              '<option value="depressed">Depressed</option>' +
              '<option value="uniform">Uniform</option>' +
              '<option value="dropshadow">Dropshadow</option>' +
            '</select>' +
          '</div>' + // vjs-edge-style
          '<div class="vjs-font-family vjs-tracksetting">' +
            '<label class="vjs-label">Font Family</label>' +
            '<select>' +
              '<option value="">Default</option>' +
              '<option value="monospaceSerif">Monospace Serif</option>' +
              '<option value="proportionalSerif">Proportional Serif</option>' +
              '<option value="monospaceSansSerif">Monospace Sans-Serif</option>' +
              '<option value="proportionalSansSerif">Proportional Sans-Serif</option>' +
              '<option value="casual">Casual</option>' +
              '<option value="script">Script</option>' +
              '<option value="small-caps">Small Caps</option>' +
            '</select>' +
          '</div>' + // vjs-font-family
        '</div>' +
      '</div>' +
      '<div class="vjs-tracksettings-controls">' +
        '<button class="vjs-default-button">Defaults</button>' +
        '<button class="vjs-done-button">Done</button>' +
      '</div>';
  }

})();
/**
 * @fileoverview Add JSON support
 * @suppress {undefinedVars}
 * (Compiler doesn't like JSON not being declared)
 */

/**
 * Javascript JSON implementation
 * (Parse Method Only)
 * https://github.com/douglascrockford/JSON-js/blob/master/json2.js
 * Only using for parse method when parsing data-setup attribute JSON.
 * @suppress {undefinedVars}
 * @namespace
 * @private
 */
vjs.JSON;

if (typeof window.JSON !== 'undefined' && typeof window.JSON.parse === 'function') {
  vjs.JSON = window.JSON;

} else {
  vjs.JSON = {};

  var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

  /**
   * parse the json
   *
   * @memberof vjs.JSON
   * @param {String} text The JSON string to parse
   * @param {Function=} [reviver] Optional function that can transform the results
   * @return {Object|Array} The parsed JSON
   */
  vjs.JSON.parse = function (text, reviver) {
      var j;

      function walk(holder, key) {
          var k, v, value = holder[key];
          if (value && typeof value === 'object') {
              for (k in value) {
                  if (Object.prototype.hasOwnProperty.call(value, k)) {
                      v = walk(value, k);
                      if (v !== undefined) {
                          value[k] = v;
                      } else {
                          delete value[k];
                      }
                  }
              }
          }
          return reviver.call(holder, key, value);
      }
      text = String(text);
      cx.lastIndex = 0;
      if (cx.test(text)) {
          text = text.replace(cx, function (a) {
              return '\\u' +
                  ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
          });
      }

      if (/^[\],:{}\s]*$/
              .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
                  .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
                  .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

          j = eval('(' + text + ')');

          return typeof reviver === 'function' ?
              walk({'': j}, '') : j;
      }

      throw new SyntaxError('JSON.parse(): invalid or malformed JSON data');
  };
}
/**
 * @fileoverview Functions for automatically setting up a player
 * based on the data-setup attribute of the video tag
 */

// Automatically set up any tags that have a data-setup attribute
vjs.autoSetup = function(){
  var options, mediaEl, player, i, e;

  // One day, when we stop supporting IE8, go back to this, but in the meantime...*hack hack hack*
  // var vids = Array.prototype.slice.call(document.getElementsByTagName('video'));
  // var audios = Array.prototype.slice.call(document.getElementsByTagName('audio'));
  // var mediaEls = vids.concat(audios);

  // Because IE8 doesn't support calling slice on a node list, we need to loop through each list of elements
  // to build up a new, combined list of elements.
  var vids = document.getElementsByTagName('video');
  var audios = document.getElementsByTagName('audio');
  var mediaEls = [];
  if (vids && vids.length > 0) {
    for(i=0, e=vids.length; i<e; i++) {
      mediaEls.push(vids[i]);
    }
  }
  if (audios && audios.length > 0) {
    for(i=0, e=audios.length; i<e; i++) {
      mediaEls.push(audios[i]);
    }
  }

  // Check if any media elements exist
  if (mediaEls && mediaEls.length > 0) {

    for (i=0,e=mediaEls.length; i<e; i++) {
      mediaEl = mediaEls[i];

      // Check if element exists, has getAttribute func.
      // IE seems to consider typeof el.getAttribute == 'object' instead of 'function' like expected, at least when loading the player immediately.
      if (mediaEl && mediaEl.getAttribute) {

        // Make sure this player hasn't already been set up.
        if (mediaEl['player'] === undefined) {
          options = mediaEl.getAttribute('data-setup');

          // Check if data-setup attr exists.
          // We only auto-setup if they've added the data-setup attr.
          if (options !== null) {
            // Create new video.js instance.
            player = videojs(mediaEl);
          }
        }

      // If getAttribute isn't defined, we need to wait for the DOM.
      } else {
        vjs.autoSetupTimeout(1);
        break;
      }
    }

  // No videos were found, so keep looping unless page is finished loading.
  } else if (!vjs.windowLoaded) {
    vjs.autoSetupTimeout(1);
  }
};

// Pause to let the DOM keep processing
vjs.autoSetupTimeout = function(wait){
  setTimeout(vjs.autoSetup, wait);
};

if (document.readyState === 'complete') {
  vjs.windowLoaded = true;
} else {
  vjs.one(window, 'load', function(){
    vjs.windowLoaded = true;
  });
}

// Run Auto-load players
// You have to wait at least once in case this script is loaded after your video in the DOM (weird behavior only with minified version)
vjs.autoSetupTimeout(1);
/**
 * the method for registering a video.js plugin
 *
 * @param  {String} name The name of the plugin
 * @param  {Function} init The function that is run when the player inits
 */
vjs.plugin = function(name, init){
  vjs.Player.prototype[name] = init;
};

/* vtt.js - v0.11.11 (https://github.com/mozilla/vtt.js) built on 22-01-2015 */

(function(root) {
  var vttjs = root.vttjs = {};
  var cueShim = vttjs.VTTCue;
  var regionShim = vttjs.VTTRegion;
  var oldVTTCue = root.VTTCue;
  var oldVTTRegion = root.VTTRegion;

  vttjs.shim = function() {
    vttjs.VTTCue = cueShim;
    vttjs.VTTRegion = regionShim;
  };

  vttjs.restore = function() {
    vttjs.VTTCue = oldVTTCue;
    vttjs.VTTRegion = oldVTTRegion;
  };
}(this));

/**
 * Copyright 2013 vtt.js Contributors
 *
 * 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.
 */

(function(root, vttjs) {

  var autoKeyword = "auto";
  var directionSetting = {
    "": true,
    "lr": true,
    "rl": true
  };
  var alignSetting = {
    "start": true,
    "middle": true,
    "end": true,
    "left": true,
    "right": true
  };

  function findDirectionSetting(value) {
    if (typeof value !== "string") {
      return false;
    }
    var dir = directionSetting[value.toLowerCase()];
    return dir ? value.toLowerCase() : false;
  }

  function findAlignSetting(value) {
    if (typeof value !== "string") {
      return false;
    }
    var align = alignSetting[value.toLowerCase()];
    return align ? value.toLowerCase() : false;
  }

  function extend(obj) {
    var i = 1;
    for (; i < arguments.length; i++) {
      var cobj = arguments[i];
      for (var p in cobj) {
        obj[p] = cobj[p];
      }
    }

    return obj;
  }

  function VTTCue(startTime, endTime, text) {
    var cue = this;
    var isIE8 = (/MSIE\s8\.0/).test(navigator.userAgent);
    var baseObj = {};

    if (isIE8) {
      cue = document.createElement('custom');
    } else {
      baseObj.enumerable = true;
    }

    /**
     * Shim implementation specific properties. These properties are not in
     * the spec.
     */

    // Lets us know when the VTTCue's data has changed in such a way that we need
    // to recompute its display state. This lets us compute its display state
    // lazily.
    cue.hasBeenReset = false;

    /**
     * VTTCue and TextTrackCue properties
     * http://dev.w3.org/html5/webvtt/#vttcue-interface
     */

    var _id = "";
    var _pauseOnExit = false;
    var _startTime = startTime;
    var _endTime = endTime;
    var _text = text;
    var _region = null;
    var _vertical = "";
    var _snapToLines = true;
    var _line = "auto";
    var _lineAlign = "start";
    var _position = 50;
    var _positionAlign = "middle";
    var _size = 50;
    var _align = "middle";

    Object.defineProperty(cue,
      "id", extend({}, baseObj, {
        get: function() {
          return _id;
        },
        set: function(value) {
          _id = "" + value;
        }
      }));

    Object.defineProperty(cue,
      "pauseOnExit", extend({}, baseObj, {
        get: function() {
          return _pauseOnExit;
        },
        set: function(value) {
          _pauseOnExit = !!value;
        }
      }));

    Object.defineProperty(cue,
      "startTime", extend({}, baseObj, {
        get: function() {
          return _startTime;
        },
        set: function(value) {
          if (typeof value !== "number") {
            throw new TypeError("Start time must be set to a number.");
          }
          _startTime = value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "endTime", extend({}, baseObj, {
        get: function() {
          return _endTime;
        },
        set: function(value) {
          if (typeof value !== "number") {
            throw new TypeError("End time must be set to a number.");
          }
          _endTime = value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "text", extend({}, baseObj, {
        get: function() {
          return _text;
        },
        set: function(value) {
          _text = "" + value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "region", extend({}, baseObj, {
        get: function() {
          return _region;
        },
        set: function(value) {
          _region = value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "vertical", extend({}, baseObj, {
        get: function() {
          return _vertical;
        },
        set: function(value) {
          var setting = findDirectionSetting(value);
          // Have to check for false because the setting an be an empty string.
          if (setting === false) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _vertical = setting;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "snapToLines", extend({}, baseObj, {
        get: function() {
          return _snapToLines;
        },
        set: function(value) {
          _snapToLines = !!value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "line", extend({}, baseObj, {
        get: function() {
          return _line;
        },
        set: function(value) {
          if (typeof value !== "number" && value !== autoKeyword) {
            throw new SyntaxError("An invalid number or illegal string was specified.");
          }
          _line = value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "lineAlign", extend({}, baseObj, {
        get: function() {
          return _lineAlign;
        },
        set: function(value) {
          var setting = findAlignSetting(value);
          if (!setting) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _lineAlign = setting;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "position", extend({}, baseObj, {
        get: function() {
          return _position;
        },
        set: function(value) {
          if (value < 0 || value > 100) {
            throw new Error("Position must be between 0 and 100.");
          }
          _position = value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "positionAlign", extend({}, baseObj, {
        get: function() {
          return _positionAlign;
        },
        set: function(value) {
          var setting = findAlignSetting(value);
          if (!setting) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _positionAlign = setting;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "size", extend({}, baseObj, {
        get: function() {
          return _size;
        },
        set: function(value) {
          if (value < 0 || value > 100) {
            throw new Error("Size must be between 0 and 100.");
          }
          _size = value;
          this.hasBeenReset = true;
        }
      }));

    Object.defineProperty(cue,
      "align", extend({}, baseObj, {
        get: function() {
          return _align;
        },
        set: function(value) {
          var setting = findAlignSetting(value);
          if (!setting) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _align = setting;
          this.hasBeenReset = true;
        }
      }));

    /**
     * Other <track> spec defined properties
     */

    // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-display-state
    cue.displayState = undefined;

    if (isIE8) {
      return cue;
    }
  }

  /**
   * VTTCue methods
   */

  VTTCue.prototype.getCueAsHTML = function() {
    // Assume WebVTT.convertCueToDOMTree is on the global.
    return WebVTT.convertCueToDOMTree(window, this.text);
  };

  root.VTTCue = root.VTTCue || VTTCue;
  vttjs.VTTCue = VTTCue;
}(this, (this.vttjs || {})));

/**
 * Copyright 2013 vtt.js Contributors
 *
 * 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.
 */

(function(root, vttjs) {

  var scrollSetting = {
    "": true,
    "up": true,
  };

  function findScrollSetting(value) {
    if (typeof value !== "string") {
      return false;
    }
    var scroll = scrollSetting[value.toLowerCase()];
    return scroll ? value.toLowerCase() : false;
  }

  function isValidPercentValue(value) {
    return typeof value === "number" && (value >= 0 && value <= 100);
  }

  // VTTRegion shim http://dev.w3.org/html5/webvtt/#vttregion-interface
  function VTTRegion() {
    var _width = 100;
    var _lines = 3;
    var _regionAnchorX = 0;
    var _regionAnchorY = 100;
    var _viewportAnchorX = 0;
    var _viewportAnchorY = 100;
    var _scroll = "";

    Object.defineProperties(this, {
      "width": {
        enumerable: true,
        get: function() {
          return _width;
        },
        set: function(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("Width must be between 0 and 100.");
          }
          _width = value;
        }
      },
      "lines": {
        enumerable: true,
        get: function() {
          return _lines;
        },
        set: function(value) {
          if (typeof value !== "number") {
            throw new TypeError("Lines must be set to a number.");
          }
          _lines = value;
        }
      },
      "regionAnchorY": {
        enumerable: true,
        get: function() {
          return _regionAnchorY;
        },
        set: function(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("RegionAnchorX must be between 0 and 100.");
          }
          _regionAnchorY = value;
        }
      },
      "regionAnchorX": {
        enumerable: true,
        get: function() {
          return _regionAnchorX;
        },
        set: function(value) {
          if(!isValidPercentValue(value)) {
            throw new Error("RegionAnchorY must be between 0 and 100.");
          }
          _regionAnchorX = value;
        }
      },
      "viewportAnchorY": {
        enumerable: true,
        get: function() {
          return _viewportAnchorY;
        },
        set: function(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("ViewportAnchorY must be between 0 and 100.");
          }
          _viewportAnchorY = value;
        }
      },
      "viewportAnchorX": {
        enumerable: true,
        get: function() {
          return _viewportAnchorX;
        },
        set: function(value) {
          if (!isValidPercentValue(value)) {
            throw new Error("ViewportAnchorX must be between 0 and 100.");
          }
          _viewportAnchorX = value;
        }
      },
      "scroll": {
        enumerable: true,
        get: function() {
          return _scroll;
        },
        set: function(value) {
          var setting = findScrollSetting(value);
          // Have to check for false as an empty string is a legal value.
          if (setting === false) {
            throw new SyntaxError("An invalid or illegal string was specified.");
          }
          _scroll = setting;
        }
      }
    });
  }

  root.VTTRegion = root.VTTRegion || VTTRegion;
  vttjs.VTTRegion = VTTRegion;
}(this, (this.vttjs || {})));

/**
 * Copyright 2013 vtt.js Contributors
 *
 * 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.
 */

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */

(function(global) {

  var _objCreate = Object.create || (function() {
    function F() {}
    return function(o) {
      if (arguments.length !== 1) {
        throw new Error('Object.create shim only accepts one parameter.');
      }
      F.prototype = o;
      return new F();
    };
  })();

  // Creates a new ParserError object from an errorData object. The errorData
  // object should have default code and message properties. The default message
  // property can be overriden by passing in a message parameter.
  // See ParsingError.Errors below for acceptable errors.
  function ParsingError(errorData, message) {
    this.name = "ParsingError";
    this.code = errorData.code;
    this.message = message || errorData.message;
  }
  ParsingError.prototype = _objCreate(Error.prototype);
  ParsingError.prototype.constructor = ParsingError;

  // ParsingError metadata for acceptable ParsingErrors.
  ParsingError.Errors = {
    BadSignature: {
      code: 0,
      message: "Malformed WebVTT signature."
    },
    BadTimeStamp: {
      code: 1,
      message: "Malformed time stamp."
    }
  };

  // Try to parse input as a time stamp.
  function parseTimeStamp(input) {

    function computeSeconds(h, m, s, f) {
      return (h | 0) * 3600 + (m | 0) * 60 + (s | 0) + (f | 0) / 1000;
    }

    var m = input.match(/^(\d+):(\d{2})(:\d{2})?\.(\d{3})/);
    if (!m) {
      return null;
    }

    if (m[3]) {
      // Timestamp takes the form of [hours]:[minutes]:[seconds].[milliseconds]
      return computeSeconds(m[1], m[2], m[3].replace(":", ""), m[4]);
    } else if (m[1] > 59) {
      // Timestamp takes the form of [hours]:[minutes].[milliseconds]
      // First position is hours as it's over 59.
      return computeSeconds(m[1], m[2], 0,  m[4]);
    } else {
      // Timestamp takes the form of [minutes]:[seconds].[milliseconds]
      return computeSeconds(0, m[1], m[2], m[4]);
    }
  }

  // A settings object holds key/value pairs and will ignore anything but the first
  // assignment to a specific key.
  function Settings() {
    this.values = _objCreate(null);
  }

  Settings.prototype = {
    // Only accept the first assignment to any key.
    set: function(k, v) {
      if (!this.get(k) && v !== "") {
        this.values[k] = v;
      }
    },
    // Return the value for a key, or a default value.
    // If 'defaultKey' is passed then 'dflt' is assumed to be an object with
    // a number of possible default values as properties where 'defaultKey' is
    // the key of the property that will be chosen; otherwise it's assumed to be
    // a single value.
    get: function(k, dflt, defaultKey) {
      if (defaultKey) {
        return this.has(k) ? this.values[k] : dflt[defaultKey];
      }
      return this.has(k) ? this.values[k] : dflt;
    },
    // Check whether we have a value for a key.
    has: function(k) {
      return k in this.values;
    },
    // Accept a setting if its one of the given alternatives.
    alt: function(k, v, a) {
      for (var n = 0; n < a.length; ++n) {
        if (v === a[n]) {
          this.set(k, v);
          break;
        }
      }
    },
    // Accept a setting if its a valid (signed) integer.
    integer: function(k, v) {
      if (/^-?\d+$/.test(v)) { // integer
        this.set(k, parseInt(v, 10));
      }
    },
    // Accept a setting if its a valid percentage.
    percent: function(k, v) {
      var m;
      if ((m = v.match(/^([\d]{1,3})(\.[\d]*)?%$/))) {
        v = parseFloat(v);
        if (v >= 0 && v <= 100) {
          this.set(k, v);
          return true;
        }
      }
      return false;
    }
  };

  // Helper function to parse input into groups separated by 'groupDelim', and
  // interprete each group as a key/value pair separated by 'keyValueDelim'.
  function parseOptions(input, callback, keyValueDelim, groupDelim) {
    var groups = groupDelim ? input.split(groupDelim) : [input];
    for (var i in groups) {
      if (typeof groups[i] !== "string") {
        continue;
      }
      var kv = groups[i].split(keyValueDelim);
      if (kv.length !== 2) {
        continue;
      }
      var k = kv[0];
      var v = kv[1];
      callback(k, v);
    }
  }

  function parseCue(input, cue, regionList) {
    // Remember the original input if we need to throw an error.
    var oInput = input;
    // 4.1 WebVTT timestamp
    function consumeTimeStamp() {
      var ts = parseTimeStamp(input);
      if (ts === null) {
        throw new ParsingError(ParsingError.Errors.BadTimeStamp,
                              "Malformed timestamp: " + oInput);
      }
      // Remove time stamp from input.
      input = input.replace(/^[^\sa-zA-Z-]+/, "");
      return ts;
    }

    // 4.4.2 WebVTT cue settings
    function consumeCueSettings(input, cue) {
      var settings = new Settings();

      parseOptions(input, function (k, v) {
        switch (k) {
        case "region":
          // Find the last region we parsed with the same region id.
          for (var i = regionList.length - 1; i >= 0; i--) {
            if (regionList[i].id === v) {
              settings.set(k, regionList[i].region);
              break;
            }
          }
          break;
        case "vertical":
          settings.alt(k, v, ["rl", "lr"]);
          break;
        case "line":
          var vals = v.split(","),
              vals0 = vals[0];
          settings.integer(k, vals0);
          settings.percent(k, vals0) ? settings.set("snapToLines", false) : null;
          settings.alt(k, vals0, ["auto"]);
          if (vals.length === 2) {
            settings.alt("lineAlign", vals[1], ["start", "middle", "end"]);
          }
          break;
        case "position":
          vals = v.split(",");
          settings.percent(k, vals[0]);
          if (vals.length === 2) {
            settings.alt("positionAlign", vals[1], ["start", "middle", "end"]);
          }
          break;
        case "size":
          settings.percent(k, v);
          break;
        case "align":
          settings.alt(k, v, ["start", "middle", "end", "left", "right"]);
          break;
        }
      }, /:/, /\s/);

      // Apply default values for any missing fields.
      cue.region = settings.get("region", null);
      cue.vertical = settings.get("vertical", "");
      cue.line = settings.get("line", "auto");
      cue.lineAlign = settings.get("lineAlign", "start");
      cue.snapToLines = settings.get("snapToLines", true);
      cue.size = settings.get("size", 100);
      cue.align = settings.get("align", "middle");
      cue.position = settings.get("position", {
        start: 0,
        left: 0,
        middle: 50,
        end: 100,
        right: 100
      }, cue.align);
      cue.positionAlign = settings.get("positionAlign", {
        start: "start",
        left: "start",
        middle: "middle",
        end: "end",
        right: "end"
      }, cue.align);
    }

    function skipWhitespace() {
      input = input.replace(/^\s+/, "");
    }

    // 4.1 WebVTT cue timings.
    skipWhitespace();
    cue.startTime = consumeTimeStamp();   // (1) collect cue start time
    skipWhitespace();
    if (input.substr(0, 3) !== "-->") {     // (3) next characters must match "-->"
      throw new ParsingError(ParsingError.Errors.BadTimeStamp,
                             "Malformed time stamp (time stamps must be separated by '-->'): " +
                             oInput);
    }
    input = input.substr(3);
    skipWhitespace();
    cue.endTime = consumeTimeStamp();     // (5) collect cue end time

    // 4.1 WebVTT cue settings list.
    skipWhitespace();
    consumeCueSettings(input, cue);
  }

  var ESCAPE = {
    "&amp;": "&",
    "&lt;": "<",
    "&gt;": ">",
    "&lrm;": "\u200e",
    "&rlm;": "\u200f",
    "&nbsp;": "\u00a0"
  };

  var TAG_NAME = {
    c: "span",
    i: "i",
    b: "b",
    u: "u",
    ruby: "ruby",
    rt: "rt",
    v: "span",
    lang: "span"
  };

  var TAG_ANNOTATION = {
    v: "title",
    lang: "lang"
  };

  var NEEDS_PARENT = {
    rt: "ruby"
  };

  // Parse content into a document fragment.
  function parseContent(window, input) {
    function nextToken() {
      // Check for end-of-string.
      if (!input) {
        return null;
      }

      // Consume 'n' characters from the input.
      function consume(result) {
        input = input.substr(result.length);
        return result;
      }

      var m = input.match(/^([^<]*)(<[^>]+>?)?/);
      // If there is some text before the next tag, return it, otherwise return
      // the tag.
      return consume(m[1] ? m[1] : m[2]);
    }

    // Unescape a string 's'.
    function unescape1(e) {
      return ESCAPE[e];
    }
    function unescape(s) {
      while ((m = s.match(/&(amp|lt|gt|lrm|rlm|nbsp);/))) {
        s = s.replace(m[0], unescape1);
      }
      return s;
    }

    function shouldAdd(current, element) {
      return !NEEDS_PARENT[element.localName] ||
             NEEDS_PARENT[element.localName] === current.localName;
    }

    // Create an element for this tag.
    function createElement(type, annotation) {
      var tagName = TAG_NAME[type];
      if (!tagName) {
        return null;
      }
      var element = window.document.createElement(tagName);
      element.localName = tagName;
      var name = TAG_ANNOTATION[type];
      if (name && annotation) {
        element[name] = annotation.trim();
      }
      return element;
    }

    var rootDiv = window.document.createElement("div"),
        current = rootDiv,
        t,
        tagStack = [];

    while ((t = nextToken()) !== null) {
      if (t[0] === '<') {
        if (t[1] === "/") {
          // If the closing tag matches, move back up to the parent node.
          if (tagStack.length &&
              tagStack[tagStack.length - 1] === t.substr(2).replace(">", "")) {
            tagStack.pop();
            current = current.parentNode;
          }
          // Otherwise just ignore the end tag.
          continue;
        }
        var ts = parseTimeStamp(t.substr(1, t.length - 2));
        var node;
        if (ts) {
          // Timestamps are lead nodes as well.
          node = window.document.createProcessingInstruction("timestamp", ts);
          current.appendChild(node);
          continue;
        }
        var m = t.match(/^<([^.\s/0-9>]+)(\.[^\s\\>]+)?([^>\\]+)?(\\?)>?$/);
        // If we can't parse the tag, skip to the next tag.
        if (!m) {
          continue;
        }
        // Try to construct an element, and ignore the tag if we couldn't.
        node = createElement(m[1], m[3]);
        if (!node) {
          continue;
        }
        // Determine if the tag should be added based on the context of where it
        // is placed in the cuetext.
        if (!shouldAdd(current, node)) {
          continue;
        }
        // Set the class list (as a list of classes, separated by space).
        if (m[2]) {
          node.className = m[2].substr(1).replace('.', ' ');
        }
        // Append the node to the current node, and enter the scope of the new
        // node.
        tagStack.push(m[1]);
        current.appendChild(node);
        current = node;
        continue;
      }

      // Text nodes are leaf nodes.
      current.appendChild(window.document.createTextNode(unescape(t)));
    }

    return rootDiv;
  }

  // This is a list of all the Unicode characters that have a strong
  // right-to-left category. What this means is that these characters are
  // written right-to-left for sure. It was generated by pulling all the strong
  // right-to-left characters out of the Unicode data table. That table can
  // found at: http://www.unicode.org/Public/UNIDATA/UnicodeData.txt
  var strongRTLChars = [0x05BE, 0x05C0, 0x05C3, 0x05C6, 0x05D0, 0x05D1,
      0x05D2, 0x05D3, 0x05D4, 0x05D5, 0x05D6, 0x05D7, 0x05D8, 0x05D9, 0x05DA,
      0x05DB, 0x05DC, 0x05DD, 0x05DE, 0x05DF, 0x05E0, 0x05E1, 0x05E2, 0x05E3,
      0x05E4, 0x05E5, 0x05E6, 0x05E7, 0x05E8, 0x05E9, 0x05EA, 0x05F0, 0x05F1,
      0x05F2, 0x05F3, 0x05F4, 0x0608, 0x060B, 0x060D, 0x061B, 0x061E, 0x061F,
      0x0620, 0x0621, 0x0622, 0x0623, 0x0624, 0x0625, 0x0626, 0x0627, 0x0628,
      0x0629, 0x062A, 0x062B, 0x062C, 0x062D, 0x062E, 0x062F, 0x0630, 0x0631,
      0x0632, 0x0633, 0x0634, 0x0635, 0x0636, 0x0637, 0x0638, 0x0639, 0x063A,
      0x063B, 0x063C, 0x063D, 0x063E, 0x063F, 0x0640, 0x0641, 0x0642, 0x0643,
      0x0644, 0x0645, 0x0646, 0x0647, 0x0648, 0x0649, 0x064A, 0x066D, 0x066E,
      0x066F, 0x0671, 0x0672, 0x0673, 0x0674, 0x0675, 0x0676, 0x0677, 0x0678,
      0x0679, 0x067A, 0x067B, 0x067C, 0x067D, 0x067E, 0x067F, 0x0680, 0x0681,
      0x0682, 0x0683, 0x0684, 0x0685, 0x0686, 0x0687, 0x0688, 0x0689, 0x068A,
      0x068B, 0x068C, 0x068D, 0x068E, 0x068F, 0x0690, 0x0691, 0x0692, 0x0693,
      0x0694, 0x0695, 0x0696, 0x0697, 0x0698, 0x0699, 0x069A, 0x069B, 0x069C,
      0x069D, 0x069E, 0x069F, 0x06A0, 0x06A1, 0x06A2, 0x06A3, 0x06A4, 0x06A5,
      0x06A6, 0x06A7, 0x06A8, 0x06A9, 0x06AA, 0x06AB, 0x06AC, 0x06AD, 0x06AE,
      0x06AF, 0x06B0, 0x06B1, 0x06B2, 0x06B3, 0x06B4, 0x06B5, 0x06B6, 0x06B7,
      0x06B8, 0x06B9, 0x06BA, 0x06BB, 0x06BC, 0x06BD, 0x06BE, 0x06BF, 0x06C0,
      0x06C1, 0x06C2, 0x06C3, 0x06C4, 0x06C5, 0x06C6, 0x06C7, 0x06C8, 0x06C9,
      0x06CA, 0x06CB, 0x06CC, 0x06CD, 0x06CE, 0x06CF, 0x06D0, 0x06D1, 0x06D2,
      0x06D3, 0x06D4, 0x06D5, 0x06E5, 0x06E6, 0x06EE, 0x06EF, 0x06FA, 0x06FB,
      0x06FC, 0x06FD, 0x06FE, 0x06FF, 0x0700, 0x0701, 0x0702, 0x0703, 0x0704,
      0x0705, 0x0706, 0x0707, 0x0708, 0x0709, 0x070A, 0x070B, 0x070C, 0x070D,
      0x070F, 0x0710, 0x0712, 0x0713, 0x0714, 0x0715, 0x0716, 0x0717, 0x0718,
      0x0719, 0x071A, 0x071B, 0x071C, 0x071D, 0x071E, 0x071F, 0x0720, 0x0721,
      0x0722, 0x0723, 0x0724, 0x0725, 0x0726, 0x0727, 0x0728, 0x0729, 0x072A,
      0x072B, 0x072C, 0x072D, 0x072E, 0x072F, 0x074D, 0x074E, 0x074F, 0x0750,
      0x0751, 0x0752, 0x0753, 0x0754, 0x0755, 0x0756, 0x0757, 0x0758, 0x0759,
      0x075A, 0x075B, 0x075C, 0x075D, 0x075E, 0x075F, 0x0760, 0x0761, 0x0762,
      0x0763, 0x0764, 0x0765, 0x0766, 0x0767, 0x0768, 0x0769, 0x076A, 0x076B,
      0x076C, 0x076D, 0x076E, 0x076F, 0x0770, 0x0771, 0x0772, 0x0773, 0x0774,
      0x0775, 0x0776, 0x0777, 0x0778, 0x0779, 0x077A, 0x077B, 0x077C, 0x077D,
      0x077E, 0x077F, 0x0780, 0x0781, 0x0782, 0x0783, 0x0784, 0x0785, 0x0786,
      0x0787, 0x0788, 0x0789, 0x078A, 0x078B, 0x078C, 0x078D, 0x078E, 0x078F,
      0x0790, 0x0791, 0x0792, 0x0793, 0x0794, 0x0795, 0x0796, 0x0797, 0x0798,
      0x0799, 0x079A, 0x079B, 0x079C, 0x079D, 0x079E, 0x079F, 0x07A0, 0x07A1,
      0x07A2, 0x07A3, 0x07A4, 0x07A5, 0x07B1, 0x07C0, 0x07C1, 0x07C2, 0x07C3,
      0x07C4, 0x07C5, 0x07C6, 0x07C7, 0x07C8, 0x07C9, 0x07CA, 0x07CB, 0x07CC,
      0x07CD, 0x07CE, 0x07CF, 0x07D0, 0x07D1, 0x07D2, 0x07D3, 0x07D4, 0x07D5,
      0x07D6, 0x07D7, 0x07D8, 0x07D9, 0x07DA, 0x07DB, 0x07DC, 0x07DD, 0x07DE,
      0x07DF, 0x07E0, 0x07E1, 0x07E2, 0x07E3, 0x07E4, 0x07E5, 0x07E6, 0x07E7,
      0x07E8, 0x07E9, 0x07EA, 0x07F4, 0x07F5, 0x07FA, 0x0800, 0x0801, 0x0802,
      0x0803, 0x0804, 0x0805, 0x0806, 0x0807, 0x0808, 0x0809, 0x080A, 0x080B,
      0x080C, 0x080D, 0x080E, 0x080F, 0x0810, 0x0811, 0x0812, 0x0813, 0x0814,
      0x0815, 0x081A, 0x0824, 0x0828, 0x0830, 0x0831, 0x0832, 0x0833, 0x0834,
      0x0835, 0x0836, 0x0837, 0x0838, 0x0839, 0x083A, 0x083B, 0x083C, 0x083D,
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      0x0851, 0x0852, 0x0853, 0x0854, 0x0855, 0x0856, 0x0857, 0x0858, 0x085E,
      0x08A0, 0x08A2, 0x08A3, 0x08A4, 0x08A5, 0x08A6, 0x08A7, 0x08A8, 0x08A9,
      0x08AA, 0x08AB, 0x08AC, 0x200F, 0xFB1D, 0xFB1F, 0xFB20, 0xFB21, 0xFB22,
      0xFB23, 0xFB24, 0xFB25, 0xFB26, 0xFB27, 0xFB28, 0xFB2A, 0xFB2B, 0xFB2C,
      0xFB2D, 0xFB2E, 0xFB2F, 0xFB30, 0xFB31, 0xFB32, 0xFB33, 0xFB34, 0xFB35,
      0xFB36, 0xFB38, 0xFB39, 0xFB3A, 0xFB3B, 0xFB3C, 0xFB3E, 0xFB40, 0xFB41,
      0xFB43, 0xFB44, 0xFB46, 0xFB47, 0xFB48, 0xFB49, 0xFB4A, 0xFB4B, 0xFB4C,
      0xFB4D, 0xFB4E, 0xFB4F, 0xFB50, 0xFB51, 0xFB52, 0xFB53, 0xFB54, 0xFB55,
      0xFB56, 0xFB57, 0xFB58, 0xFB59, 0xFB5A, 0xFB5B, 0xFB5C, 0xFB5D, 0xFB5E,
      0xFB5F, 0xFB60, 0xFB61, 0xFB62, 0xFB63, 0xFB64, 0xFB65, 0xFB66, 0xFB67,
      0xFB68, 0xFB69, 0xFB6A, 0xFB6B, 0xFB6C, 0xFB6D, 0xFB6E, 0xFB6F, 0xFB70,
      0xFB71, 0xFB72, 0xFB73, 0xFB74, 0xFB75, 0xFB76, 0xFB77, 0xFB78, 0xFB79,
      0xFB7A, 0xFB7B, 0xFB7C, 0xFB7D, 0xFB7E, 0xFB7F, 0xFB80, 0xFB81, 0xFB82,
      0xFB83, 0xFB84, 0xFB85, 0xFB86, 0xFB87, 0xFB88, 0xFB89, 0xFB8A, 0xFB8B,
      0xFB8C, 0xFB8D, 0xFB8E, 0xFB8F, 0xFB90, 0xFB91, 0xFB92, 0xFB93, 0xFB94,
      0xFB95, 0xFB96, 0xFB97, 0xFB98, 0xFB99, 0xFB9A, 0xFB9B, 0xFB9C, 0xFB9D,
      0xFB9E, 0xFB9F, 0xFBA0, 0xFBA1, 0xFBA2, 0xFBA3, 0xFBA4, 0xFBA5, 0xFBA6,
      0xFBA7, 0xFBA8, 0xFBA9, 0xFBAA, 0xFBAB, 0xFBAC, 0xFBAD, 0xFBAE, 0xFBAF,
      0xFBB0, 0xFBB1, 0xFBB2, 0xFBB3, 0xFBB4, 0xFBB5, 0xFBB6, 0xFBB7, 0xFBB8,
      0xFBB9, 0xFBBA, 0xFBBB, 0xFBBC, 0xFBBD, 0xFBBE, 0xFBBF, 0xFBC0, 0xFBC1,
      0xFBD3, 0xFBD4, 0xFBD5, 0xFBD6, 0xFBD7, 0xFBD8, 0xFBD9, 0xFBDA, 0xFBDB,
      0xFBDC, 0xFBDD, 0xFBDE, 0xFBDF, 0xFBE0, 0xFBE1, 0xFBE2, 0xFBE3, 0xFBE4,
      0xFBE5, 0xFBE6, 0xFBE7, 0xFBE8, 0xFBE9, 0xFBEA, 0xFBEB, 0xFBEC, 0xFBED,
      0xFBEE, 0xFBEF, 0xFBF0, 0xFBF1, 0xFBF2, 0xFBF3, 0xFBF4, 0xFBF5, 0xFBF6,
      0xFBF7, 0xFBF8, 0xFBF9, 0xFBFA, 0xFBFB, 0xFBFC, 0xFBFD, 0xFBFE, 0xFBFF,
      0xFC00, 0xFC01, 0xFC02, 0xFC03, 0xFC04, 0xFC05, 0xFC06, 0xFC07, 0xFC08,
      0xFC09, 0xFC0A, 0xFC0B, 0xFC0C, 0xFC0D, 0xFC0E, 0xFC0F, 0xFC10, 0xFC11,
      0xFC12, 0xFC13, 0xFC14, 0xFC15, 0xFC16, 0xFC17, 0xFC18, 0xFC19, 0xFC1A,
      0xFC1B, 0xFC1C, 0xFC1D, 0xFC1E, 0xFC1F, 0xFC20, 0xFC21, 0xFC22, 0xFC23,
      0xFC24, 0xFC25, 0xFC26, 0xFC27, 0xFC28, 0xFC29, 0xFC2A, 0xFC2B, 0xFC2C,
      0xFC2D, 0xFC2E, 0xFC2F, 0xFC30, 0xFC31, 0xFC32, 0xFC33, 0xFC34, 0xFC35,
      0xFC36, 0xFC37, 0xFC38, 0xFC39, 0xFC3A, 0xFC3B, 0xFC3C, 0xFC3D, 0xFC3E,
      0xFC3F, 0xFC40, 0xFC41, 0xFC42, 0xFC43, 0xFC44, 0xFC45, 0xFC46, 0xFC47,
      0xFC48, 0xFC49, 0xFC4A, 0xFC4B, 0xFC4C, 0xFC4D, 0xFC4E, 0xFC4F, 0xFC50,
      0xFC51, 0xFC52, 0xFC53, 0xFC54, 0xFC55, 0xFC56, 0xFC57, 0xFC58, 0xFC59,
      0xFC5A, 0xFC5B, 0xFC5C, 0xFC5D, 0xFC5E, 0xFC5F, 0xFC60, 0xFC61, 0xFC62,
      0xFC63, 0xFC64, 0xFC65, 0xFC66, 0xFC67, 0xFC68, 0xFC69, 0xFC6A, 0xFC6B,
      0xFC6C, 0xFC6D, 0xFC6E, 0xFC6F, 0xFC70, 0xFC71, 0xFC72, 0xFC73, 0xFC74,
      0xFC75, 0xFC76, 0xFC77, 0xFC78, 0xFC79, 0xFC7A, 0xFC7B, 0xFC7C, 0xFC7D,
      0xFC7E, 0xFC7F, 0xFC80, 0xFC81, 0xFC82, 0xFC83, 0xFC84, 0xFC85, 0xFC86,
      0xFC87, 0xFC88, 0xFC89, 0xFC8A, 0xFC8B, 0xFC8C, 0xFC8D, 0xFC8E, 0xFC8F,
      0xFC90, 0xFC91, 0xFC92, 0xFC93, 0xFC94, 0xFC95, 0xFC96, 0xFC97, 0xFC98,
      0xFC99, 0xFC9A, 0xFC9B, 0xFC9C, 0xFC9D, 0xFC9E, 0xFC9F, 0xFCA0, 0xFCA1,
      0xFCA2, 0xFCA3, 0xFCA4, 0xFCA5, 0xFCA6, 0xFCA7, 0xFCA8, 0xFCA9, 0xFCAA,
      0xFCAB, 0xFCAC, 0xFCAD, 0xFCAE, 0xFCAF, 0xFCB0, 0xFCB1, 0xFCB2, 0xFCB3,
      0xFCB4, 0xFCB5, 0xFCB6, 0xFCB7, 0xFCB8, 0xFCB9, 0xFCBA, 0xFCBB, 0xFCBC,
      0xFCBD, 0xFCBE, 0xFCBF, 0xFCC0, 0xFCC1, 0xFCC2, 0xFCC3, 0xFCC4, 0xFCC5,
      0xFCC6, 0xFCC7, 0xFCC8, 0xFCC9, 0xFCCA, 0xFCCB, 0xFCCC, 0xFCCD, 0xFCCE,
      0xFCCF, 0xFCD0, 0xFCD1, 0xFCD2, 0xFCD3, 0xFCD4, 0xFCD5, 0xFCD6, 0xFCD7,
      0xFCD8, 0xFCD9, 0xFCDA, 0xFCDB, 0xFCDC, 0xFCDD, 0xFCDE, 0xFCDF, 0xFCE0,
      0xFCE1, 0xFCE2, 0xFCE3, 0xFCE4, 0xFCE5, 0xFCE6, 0xFCE7, 0xFCE8, 0xFCE9,
      0xFCEA, 0xFCEB, 0xFCEC, 0xFCED, 0xFCEE, 0xFCEF, 0xFCF0, 0xFCF1, 0xFCF2,
      0xFCF3, 0xFCF4, 0xFCF5, 0xFCF6, 0xFCF7, 0xFCF8, 0xFCF9, 0xFCFA, 0xFCFB,
      0xFCFC, 0xFCFD, 0xFCFE, 0xFCFF, 0xFD00, 0xFD01, 0xFD02, 0xFD03, 0xFD04,
      0xFD05, 0xFD06, 0xFD07, 0xFD08, 0xFD09, 0xFD0A, 0xFD0B, 0xFD0C, 0xFD0D,
      0xFD0E, 0xFD0F, 0xFD10, 0xFD11, 0xFD12, 0xFD13, 0xFD14, 0xFD15, 0xFD16,
      0xFD17, 0xFD18, 0xFD19, 0xFD1A, 0xFD1B, 0xFD1C, 0xFD1D, 0xFD1E, 0xFD1F,
      0xFD20, 0xFD21, 0xFD22, 0xFD23, 0xFD24, 0xFD25, 0xFD26, 0xFD27, 0xFD28,
      0xFD29, 0xFD2A, 0xFD2B, 0xFD2C, 0xFD2D, 0xFD2E, 0xFD2F, 0xFD30, 0xFD31,
      0xFD32, 0xFD33, 0xFD34, 0xFD35, 0xFD36, 0xFD37, 0xFD38, 0xFD39, 0xFD3A,
      0xFD3B, 0xFD3C, 0xFD3D, 0xFD50, 0xFD51, 0xFD52, 0xFD53, 0xFD54, 0xFD55,
      0xFD56, 0xFD57, 0xFD58, 0xFD59, 0xFD5A, 0xFD5B, 0xFD5C, 0xFD5D, 0xFD5E,
      0xFD5F, 0xFD60, 0xFD61, 0xFD62, 0xFD63, 0xFD64, 0xFD65, 0xFD66, 0xFD67,
      0xFD68, 0xFD69, 0xFD6A, 0xFD6B, 0xFD6C, 0xFD6D, 0xFD6E, 0xFD6F, 0xFD70,
      0xFD71, 0xFD72, 0xFD73, 0xFD74, 0xFD75, 0xFD76, 0xFD77, 0xFD78, 0xFD79,
      0xFD7A, 0xFD7B, 0xFD7C, 0xFD7D, 0xFD7E, 0xFD7F, 0xFD80, 0xFD81, 0xFD82,
      0xFD83, 0xFD84, 0xFD85, 0xFD86, 0xFD87, 0xFD88, 0xFD89, 0xFD8A, 0xFD8B,
      0xFD8C, 0xFD8D, 0xFD8E, 0xFD8F, 0xFD92, 0xFD93, 0xFD94, 0xFD95, 0xFD96,
      0xFD97, 0xFD98, 0xFD99, 0xFD9A, 0xFD9B, 0xFD9C, 0xFD9D, 0xFD9E, 0xFD9F,
      0xFDA0, 0xFDA1, 0xFDA2, 0xFDA3, 0xFDA4, 0xFDA5, 0xFDA6, 0xFDA7, 0xFDA8,
      0xFDA9, 0xFDAA, 0xFDAB, 0xFDAC, 0xFDAD, 0xFDAE, 0xFDAF, 0xFDB0, 0xFDB1,
      0xFDB2, 0xFDB3, 0xFDB4, 0xFDB5, 0xFDB6, 0xFDB7, 0xFDB8, 0xFDB9, 0xFDBA,
      0xFDBB, 0xFDBC, 0xFDBD, 0xFDBE, 0xFDBF, 0xFDC0, 0xFDC1, 0xFDC2, 0xFDC3,
      0xFDC4, 0xFDC5, 0xFDC6, 0xFDC7, 0xFDF0, 0xFDF1, 0xFDF2, 0xFDF3, 0xFDF4,
      0xFDF5, 0xFDF6, 0xFDF7, 0xFDF8, 0xFDF9, 0xFDFA, 0xFDFB, 0xFDFC, 0xFE70,
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      0xFE7B, 0xFE7C, 0xFE7D, 0xFE7E, 0xFE7F, 0xFE80, 0xFE81, 0xFE82, 0xFE83,
      0xFE84, 0xFE85, 0xFE86, 0xFE87, 0xFE88, 0xFE89, 0xFE8A, 0xFE8B, 0xFE8C,
      0xFE8D, 0xFE8E, 0xFE8F, 0xFE90, 0xFE91, 0xFE92, 0xFE93, 0xFE94, 0xFE95,
      0xFE96, 0xFE97, 0xFE98, 0xFE99, 0xFE9A, 0xFE9B, 0xFE9C, 0xFE9D, 0xFE9E,
      0xFE9F, 0xFEA0, 0xFEA1, 0xFEA2, 0xFEA3, 0xFEA4, 0xFEA5, 0xFEA6, 0xFEA7,
      0xFEA8, 0xFEA9, 0xFEAA, 0xFEAB, 0xFEAC, 0xFEAD, 0xFEAE, 0xFEAF, 0xFEB0,
      0xFEB1, 0xFEB2, 0xFEB3, 0xFEB4, 0xFEB5, 0xFEB6, 0xFEB7, 0xFEB8, 0xFEB9,
      0xFEBA, 0xFEBB, 0xFEBC, 0xFEBD, 0xFEBE, 0xFEBF, 0xFEC0, 0xFEC1, 0xFEC2,
      0xFEC3, 0xFEC4, 0xFEC5, 0xFEC6, 0xFEC7, 0xFEC8, 0xFEC9, 0xFECA, 0xFECB,
      0xFECC, 0xFECD, 0xFECE, 0xFECF, 0xFED0, 0xFED1, 0xFED2, 0xFED3, 0xFED4,
      0xFED5, 0xFED6, 0xFED7, 0xFED8, 0xFED9, 0xFEDA, 0xFEDB, 0xFEDC, 0xFEDD,
      0xFEDE, 0xFEDF, 0xFEE0, 0xFEE1, 0xFEE2, 0xFEE3, 0xFEE4, 0xFEE5, 0xFEE6,
      0xFEE7, 0xFEE8, 0xFEE9, 0xFEEA, 0xFEEB, 0xFEEC, 0xFEED, 0xFEEE, 0xFEEF,
      0xFEF0, 0xFEF1, 0xFEF2, 0xFEF3, 0xFEF4, 0xFEF5, 0xFEF6, 0xFEF7, 0xFEF8,
      0xFEF9, 0xFEFA, 0xFEFB, 0xFEFC, 0x10800, 0x10801, 0x10802, 0x10803,
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      0x1092A, 0x1092B, 0x1092C, 0x1092D, 0x1092E, 0x1092F, 0x10930, 0x10931,
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      0x1093F, 0x10980, 0x10981, 0x10982, 0x10983, 0x10984, 0x10985, 0x10986,
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      0x109A7, 0x109A8, 0x109A9, 0x109AA, 0x109AB, 0x109AC, 0x109AD, 0x109AE,
      0x109AF, 0x109B0, 0x109B1, 0x109B2, 0x109B3, 0x109B4, 0x109B5, 0x109B6,
      0x109B7, 0x109BE, 0x109BF, 0x10A00, 0x10A10, 0x10A11, 0x10A12, 0x10A13,
      0x10A15, 0x10A16, 0x10A17, 0x10A19, 0x10A1A, 0x10A1B, 0x10A1C, 0x10A1D,
      0x10A1E, 0x10A1F, 0x10A20, 0x10A21, 0x10A22, 0x10A23, 0x10A24, 0x10A25,
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      0x10A52, 0x10A53, 0x10A54, 0x10A55, 0x10A56, 0x10A57, 0x10A58, 0x10A60,
      0x10A61, 0x10A62, 0x10A63, 0x10A64, 0x10A65, 0x10A66, 0x10A67, 0x10A68,
      0x10A69, 0x10A6A, 0x10A6B, 0x10A6C, 0x10A6D, 0x10A6E, 0x10A6F, 0x10A70,
      0x10A71, 0x10A72, 0x10A73, 0x10A74, 0x10A75, 0x10A76, 0x10A77, 0x10A78,
      0x10A79, 0x10A7A, 0x10A7B, 0x10A7C, 0x10A7D, 0x10A7E, 0x10A7F, 0x10B00,
      0x10B01, 0x10B02, 0x10B03, 0x10B04, 0x10B05, 0x10B06, 0x10B07, 0x10B08,
      0x10B09, 0x10B0A, 0x10B0B, 0x10B0C, 0x10B0D, 0x10B0E, 0x10B0F, 0x10B10,
      0x10B11, 0x10B12, 0x10B13, 0x10B14, 0x10B15, 0x10B16, 0x10B17, 0x10B18,
      0x10B19, 0x10B1A, 0x10B1B, 0x10B1C, 0x10B1D, 0x10B1E, 0x10B1F, 0x10B20,
      0x10B21, 0x10B22, 0x10B23, 0x10B24, 0x10B25, 0x10B26, 0x10B27, 0x10B28,
      0x10B29, 0x10B2A, 0x10B2B, 0x10B2C, 0x10B2D, 0x10B2E, 0x10B2F, 0x10B30,
      0x10B31, 0x10B32, 0x10B33, 0x10B34, 0x10B35, 0x10B40, 0x10B41, 0x10B42,
      0x10B43, 0x10B44, 0x10B45, 0x10B46, 0x10B47, 0x10B48, 0x10B49, 0x10B4A,
      0x10B4B, 0x10B4C, 0x10B4D, 0x10B4E, 0x10B4F, 0x10B50, 0x10B51, 0x10B52,
      0x10B53, 0x10B54, 0x10B55, 0x10B58, 0x10B59, 0x10B5A, 0x10B5B, 0x10B5C,
      0x10B5D, 0x10B5E, 0x10B5F, 0x10B60, 0x10B61, 0x10B62, 0x10B63, 0x10B64,
      0x10B65, 0x10B66, 0x10B67, 0x10B68, 0x10B69, 0x10B6A, 0x10B6B, 0x10B6C,
      0x10B6D, 0x10B6E, 0x10B6F, 0x10B70, 0x10B71, 0x10B72, 0x10B78, 0x10B79,
      0x10B7A, 0x10B7B, 0x10B7C, 0x10B7D, 0x10B7E, 0x10B7F, 0x10C00, 0x10C01,
      0x10C02, 0x10C03, 0x10C04, 0x10C05, 0x10C06, 0x10C07, 0x10C08, 0x10C09,
      0x10C0A, 0x10C0B, 0x10C0C, 0x10C0D, 0x10C0E, 0x10C0F, 0x10C10, 0x10C11,
      0x10C12, 0x10C13, 0x10C14, 0x10C15, 0x10C16, 0x10C17, 0x10C18, 0x10C19,
      0x10C1A, 0x10C1B, 0x10C1C, 0x10C1D, 0x10C1E, 0x10C1F, 0x10C20, 0x10C21,
      0x10C22, 0x10C23, 0x10C24, 0x10C25, 0x10C26, 0x10C27, 0x10C28, 0x10C29,
      0x10C2A, 0x10C2B, 0x10C2C, 0x10C2D, 0x10C2E, 0x10C2F, 0x10C30, 0x10C31,
      0x10C32, 0x10C33, 0x10C34, 0x10C35, 0x10C36, 0x10C37, 0x10C38, 0x10C39,
      0x10C3A, 0x10C3B, 0x10C3C, 0x10C3D, 0x10C3E, 0x10C3F, 0x10C40, 0x10C41,
      0x10C42, 0x10C43, 0x10C44, 0x10C45, 0x10C46, 0x10C47, 0x10C48, 0x1EE00,
      0x1EE01, 0x1EE02, 0x1EE03, 0x1EE05, 0x1EE06, 0x1EE07, 0x1EE08, 0x1EE09,
      0x1EE0A, 0x1EE0B, 0x1EE0C, 0x1EE0D, 0x1EE0E, 0x1EE0F, 0x1EE10, 0x1EE11,
      0x1EE12, 0x1EE13, 0x1EE14, 0x1EE15, 0x1EE16, 0x1EE17, 0x1EE18, 0x1EE19,
      0x1EE1A, 0x1EE1B, 0x1EE1C, 0x1EE1D, 0x1EE1E, 0x1EE1F, 0x1EE21, 0x1EE22,
      0x1EE24, 0x1EE27, 0x1EE29, 0x1EE2A, 0x1EE2B, 0x1EE2C, 0x1EE2D, 0x1EE2E,
      0x1EE2F, 0x1EE30, 0x1EE31, 0x1EE32, 0x1EE34, 0x1EE35, 0x1EE36, 0x1EE37,
      0x1EE39, 0x1EE3B, 0x1EE42, 0x1EE47, 0x1EE49, 0x1EE4B, 0x1EE4D, 0x1EE4E,
      0x1EE4F, 0x1EE51, 0x1EE52, 0x1EE54, 0x1EE57, 0x1EE59, 0x1EE5B, 0x1EE5D,
      0x1EE5F, 0x1EE61, 0x1EE62, 0x1EE64, 0x1EE67, 0x1EE68, 0x1EE69, 0x1EE6A,
      0x1EE6C, 0x1EE6D, 0x1EE6E, 0x1EE6F, 0x1EE70, 0x1EE71, 0x1EE72, 0x1EE74,
      0x1EE75, 0x1EE76, 0x1EE77, 0x1EE79, 0x1EE7A, 0x1EE7B, 0x1EE7C, 0x1EE7E,
      0x1EE80, 0x1EE81, 0x1EE82, 0x1EE83, 0x1EE84, 0x1EE85, 0x1EE86, 0x1EE87,
      0x1EE88, 0x1EE89, 0x1EE8B, 0x1EE8C, 0x1EE8D, 0x1EE8E, 0x1EE8F, 0x1EE90,
      0x1EE91, 0x1EE92, 0x1EE93, 0x1EE94, 0x1EE95, 0x1EE96, 0x1EE97, 0x1EE98,
      0x1EE99, 0x1EE9A, 0x1EE9B, 0x1EEA1, 0x1EEA2, 0x1EEA3, 0x1EEA5, 0x1EEA6,
      0x1EEA7, 0x1EEA8, 0x1EEA9, 0x1EEAB, 0x1EEAC, 0x1EEAD, 0x1EEAE, 0x1EEAF,
      0x1EEB0, 0x1EEB1, 0x1EEB2, 0x1EEB3, 0x1EEB4, 0x1EEB5, 0x1EEB6, 0x1EEB7,
      0x1EEB8, 0x1EEB9, 0x1EEBA, 0x1EEBB, 0x10FFFD];

  function determineBidi(cueDiv) {
    var nodeStack = [],
        text = "",
        charCode;

    if (!cueDiv || !cueDiv.childNodes) {
      return "ltr";
    }

    function pushNodes(nodeStack, node) {
      for (var i = node.childNodes.length - 1; i >= 0; i--) {
        nodeStack.push(node.childNodes[i]);
      }
    }

    function nextTextNode(nodeStack) {
      if (!nodeStack || !nodeStack.length) {
        return null;
      }

      var node = nodeStack.pop(),
          text = node.textContent || node.innerText;
      if (text) {
        // TODO: This should match all unicode type B characters (paragraph
        // separator characters). See issue #115.
        var m = text.match(/^.*(\n|\r)/);
        if (m) {
          nodeStack.length = 0;
          return m[0];
        }
        return text;
      }
      if (node.tagName === "ruby") {
        return nextTextNode(nodeStack);
      }
      if (node.childNodes) {
        pushNodes(nodeStack, node);
        return nextTextNode(nodeStack);
      }
    }

    pushNodes(nodeStack, cueDiv);
    while ((text = nextTextNode(nodeStack))) {
      for (var i = 0; i < text.length; i++) {
        charCode = text.charCodeAt(i);
        for (var j = 0; j < strongRTLChars.length; j++) {
          if (strongRTLChars[j] === charCode) {
            return "rtl";
          }
        }
      }
    }
    return "ltr";
  }

  function computeLinePos(cue) {
    if (typeof cue.line === "number" &&
        (cue.snapToLines || (cue.line >= 0 && cue.line <= 100))) {
      return cue.line;
    }
    if (!cue.track || !cue.track.textTrackList ||
        !cue.track.textTrackList.mediaElement) {
      return -1;
    }
    var track = cue.track,
        trackList = track.textTrackList,
        count = 0;
    for (var i = 0; i < trackList.length && trackList[i] !== track; i++) {
      if (trackList[i].mode === "showing") {
        count++;
      }
    }
    return ++count * -1;
  }

  function StyleBox() {
  }

  // Apply styles to a div. If there is no div passed then it defaults to the
  // div on 'this'.
  StyleBox.prototype.applyStyles = function(styles, div) {
    div = div || this.div;
    for (var prop in styles) {
      if (styles.hasOwnProperty(prop)) {
        div.style[prop] = styles[prop];
      }
    }
  };

  StyleBox.prototype.formatStyle = function(val, unit) {
    return val === 0 ? 0 : val + unit;
  };

  // Constructs the computed display state of the cue (a div). Places the div
  // into the overlay which should be a block level element (usually a div).
  function CueStyleBox(window, cue, styleOptions) {
    var isIE8 = (/MSIE\s8\.0/).test(navigator.userAgent);
    var color = "rgba(255, 255, 255, 1)";
    var backgroundColor = "rgba(0, 0, 0, 0.8)";

    if (isIE8) {
      color = "rgb(255, 255, 255)";
      backgroundColor = "rgb(0, 0, 0)";
    }

    StyleBox.call(this);
    this.cue = cue;

    // Parse our cue's text into a DOM tree rooted at 'cueDiv'. This div will
    // have inline positioning and will function as the cue background box.
    this.cueDiv = parseContent(window, cue.text);
    var styles = {
      color: color,
      backgroundColor: backgroundColor,
      position: "relative",
      left: 0,
      right: 0,
      top: 0,
      bottom: 0,
      display: "inline"
    };

    if (!isIE8) {
      styles.writingMode = cue.vertical === "" ? "horizontal-tb"
                                               : cue.vertical === "lr" ? "vertical-lr"
                                                                       : "vertical-rl";
      styles.unicodeBidi = "plaintext";
    }
    this.applyStyles(styles, this.cueDiv);

    // Create an absolutely positioned div that will be used to position the cue
    // div. Note, all WebVTT cue-setting alignments are equivalent to the CSS
    // mirrors of them except "middle" which is "center" in CSS.
    this.div = window.document.createElement("div");
    styles = {
      textAlign: cue.align === "middle" ? "center" : cue.align,
      font: styleOptions.font,
      whiteSpace: "pre-line",
      position: "absolute"
    };

    if (!isIE8) {
      styles.direction = determineBidi(this.cueDiv);
      styles.writingMode = cue.vertical === "" ? "horizontal-tb"
                                               : cue.vertical === "lr" ? "vertical-lr"
                                                                       : "vertical-rl".
      stylesunicodeBidi =  "plaintext";
    }

    this.applyStyles(styles);

    this.div.appendChild(this.cueDiv);

    // Calculate the distance from the reference edge of the viewport to the text
    // position of the cue box. The reference edge will be resolved later when
    // the box orientation styles are applied.
    var textPos = 0;
    switch (cue.positionAlign) {
    case "start":
      textPos = cue.position;
      break;
    case "middle":
      textPos = cue.position - (cue.size / 2);
      break;
    case "end":
      textPos = cue.position - cue.size;
      break;
    }

    // Horizontal box orientation; textPos is the distance from the left edge of the
    // area to the left edge of the box and cue.size is the distance extending to
    // the right from there.
    if (cue.vertical === "") {
      this.applyStyles({
        left:  this.formatStyle(textPos, "%"),
        width: this.formatStyle(cue.size, "%"),
      });
    // Vertical box orientation; textPos is the distance from the top edge of the
    // area to the top edge of the box and cue.size is the height extending
    // downwards from there.
    } else {
      this.applyStyles({
        top: this.formatStyle(textPos, "%"),
        height: this.formatStyle(cue.size, "%")
      });
    }

    this.move = function(box) {
      this.applyStyles({
        top: this.formatStyle(box.top, "px"),
        bottom: this.formatStyle(box.bottom, "px"),
        left: this.formatStyle(box.left, "px"),
        right: this.formatStyle(box.right, "px"),
        height: this.formatStyle(box.height, "px"),
        width: this.formatStyle(box.width, "px"),
      });
    };
  }
  CueStyleBox.prototype = _objCreate(StyleBox.prototype);
  CueStyleBox.prototype.constructor = CueStyleBox;

  // Represents the co-ordinates of an Element in a way that we can easily
  // compute things with such as if it overlaps or intersects with another Element.
  // Can initialize it with either a StyleBox or another BoxPosition.
  function BoxPosition(obj) {
    var isIE8 = (/MSIE\s8\.0/).test(navigator.userAgent);

    // Either a BoxPosition was passed in and we need to copy it, or a StyleBox
    // was passed in and we need to copy the results of 'getBoundingClientRect'
    // as the object returned is readonly. All co-ordinate values are in reference
    // to the viewport origin (top left).
    var lh, height, width, top;
    if (obj.div) {
      height = obj.div.offsetHeight;
      width = obj.div.offsetWidth;
      top = obj.div.offsetTop;

      var rects = (rects = obj.div.childNodes) && (rects = rects[0]) &&
                  rects.getClientRects && rects.getClientRects();
      obj = obj.div.getBoundingClientRect();
      // In certain cases the outter div will be slightly larger then the sum of
      // the inner div's lines. This could be due to bold text, etc, on some platforms.
      // In this case we should get the average line height and use that. This will
      // result in the desired behaviour.
      lh = rects ? Math.max((rects[0] && rects[0].height) || 0, obj.height / rects.length)
                 : 0;

    }
    this.left = obj.left;
    this.right = obj.right;
    this.top = obj.top || top;
    this.height = obj.height || height;
    this.bottom = obj.bottom || (top + (obj.height || height));
    this.width = obj.width || width;
    this.lineHeight = lh !== undefined ? lh : obj.lineHeight;

    if (isIE8 && !this.lineHeight) {
      this.lineHeight = 13;
    }
  }

  // Move the box along a particular axis. Optionally pass in an amount to move
  // the box. If no amount is passed then the default is the line height of the
  // box.
  BoxPosition.prototype.move = function(axis, toMove) {
    toMove = toMove !== undefined ? toMove : this.lineHeight;
    switch (axis) {
    case "+x":
      this.left += toMove;
      this.right += toMove;
      break;
    case "-x":
      this.left -= toMove;
      this.right -= toMove;
      break;
    case "+y":
      this.top += toMove;
      this.bottom += toMove;
      break;
    case "-y":
      this.top -= toMove;
      this.bottom -= toMove;
      break;
    }
  };

  // Check if this box overlaps another box, b2.
  BoxPosition.prototype.overlaps = function(b2) {
    return this.left < b2.right &&
           this.right > b2.left &&
           this.top < b2.bottom &&
           this.bottom > b2.top;
  };

  // Check if this box overlaps any other boxes in boxes.
  BoxPosition.prototype.overlapsAny = function(boxes) {
    for (var i = 0; i < boxes.length; i++) {
      if (this.overlaps(boxes[i])) {
        return true;
      }
    }
    return false;
  };

  // Check if this box is within another box.
  BoxPosition.prototype.within = function(container) {
    return this.top >= container.top &&
           this.bottom <= container.bottom &&
           this.left >= container.left &&
           this.right <= container.right;
  };

  // Check if this box is entirely within the container or it is overlapping
  // on the edge opposite of the axis direction passed. For example, if "+x" is
  // passed and the box is overlapping on the left edge of the container, then
  // return true.
  BoxPosition.prototype.overlapsOppositeAxis = function(container, axis) {
    switch (axis) {
    case "+x":
      return this.left < container.left;
    case "-x":
      return this.right > container.right;
    case "+y":
      return this.top < container.top;
    case "-y":
      return this.bottom > container.bottom;
    }
  };

  // Find the percentage of the area that this box is overlapping with another
  // box.
  BoxPosition.prototype.intersectPercentage = function(b2) {
    var x = Math.max(0, Math.min(this.right, b2.right) - Math.max(this.left, b2.left)),
        y = Math.max(0, Math.min(this.bottom, b2.bottom) - Math.max(this.top, b2.top)),
        intersectArea = x * y;
    return intersectArea / (this.height * this.width);
  };

  // Convert the positions from this box to CSS compatible positions using
  // the reference container's positions. This has to be done because this
  // box's positions are in reference to the viewport origin, whereas, CSS
  // values are in referecne to their respective edges.
  BoxPosition.prototype.toCSSCompatValues = function(reference) {
    return {
      top: this.top - reference.top,
      bottom: reference.bottom - this.bottom,
      left: this.left - reference.left,
      right: reference.right - this.right,
      height: this.height,
      width: this.width
    };
  };

  // Get an object that represents the box's position without anything extra.
  // Can pass a StyleBox, HTMLElement, or another BoxPositon.
  BoxPosition.getSimpleBoxPosition = function(obj) {
    var height = obj.div ? obj.div.offsetHeight : obj.tagName ? obj.offsetHeight : 0;
    var width = obj.div ? obj.div.offsetWidth : obj.tagName ? obj.offsetWidth : 0;
    var top = obj.div ? obj.div.offsetTop : obj.tagName ? obj.offsetTop : 0;

    obj = obj.div ? obj.div.getBoundingClientRect() :
                  obj.tagName ? obj.getBoundingClientRect() : obj;
    var ret = {
      left: obj.left,
      right: obj.right,
      top: obj.top || top,
      height: obj.height || height,
      bottom: obj.bottom || (top + (obj.height || height)),
      width: obj.width || width
    };
    return ret;
  };

  // Move a StyleBox to its specified, or next best, position. The containerBox
  // is the box that contains the StyleBox, such as a div. boxPositions are
  // a list of other boxes that the styleBox can't overlap with.
  function moveBoxToLinePosition(window, styleBox, containerBox, boxPositions) {

    // Find the best position for a cue box, b, on the video. The axis parameter
    // is a list of axis, the order of which, it will move the box along. For example:
    // Passing ["+x", "-x"] will move the box first along the x axis in the positive
    // direction. If it doesn't find a good position for it there it will then move
    // it along the x axis in the negative direction.
    function findBestPosition(b, axis) {
      var bestPosition,
          specifiedPosition = new BoxPosition(b),
          percentage = 1; // Highest possible so the first thing we get is better.

      for (var i = 0; i < axis.length; i++) {
        while (b.overlapsOppositeAxis(containerBox, axis[i]) ||
               (b.within(containerBox) && b.overlapsAny(boxPositions))) {
          b.move(axis[i]);
        }
        // We found a spot where we aren't overlapping anything. This is our
        // best position.
        if (b.within(containerBox)) {
          return b;
        }
        var p = b.intersectPercentage(containerBox);
        // If we're outside the container box less then we were on our last try
        // then remember this position as the best position.
        if (percentage > p) {
          bestPosition = new BoxPosition(b);
          percentage = p;
        }
        // Reset the box position to the specified position.
        b = new BoxPosition(specifiedPosition);
      }
      return bestPosition || specifiedPosition;
    }

    var boxPosition = new BoxPosition(styleBox),
        cue = styleBox.cue,
        linePos = computeLinePos(cue),
        axis = [];

    // If we have a line number to align the cue to.
    if (cue.snapToLines) {
      var size;
      switch (cue.vertical) {
      case "":
        axis = [ "+y", "-y" ];
        size = "height";
        break;
      case "rl":
        axis = [ "+x", "-x" ];
        size = "width";
        break;
      case "lr":
        axis = [ "-x", "+x" ];
        size = "width";
        break;
      }

      var step = boxPosition.lineHeight,
          position = step * Math.round(linePos),
          maxPosition = containerBox[size] + step,
          initialAxis = axis[0];

      // If the specified intial position is greater then the max position then
      // clamp the box to the amount of steps it would take for the box to
      // reach the max position.
      if (Math.abs(position) > maxPosition) {
        position = position < 0 ? -1 : 1;
        position *= Math.ceil(maxPosition / step) * step;
      }

      // If computed line position returns negative then line numbers are
      // relative to the bottom of the video instead of the top. Therefore, we
      // need to increase our initial position by the length or width of the
      // video, depending on the writing direction, and reverse our axis directions.
      if (linePos < 0) {
        position += cue.vertical === "" ? containerBox.height : containerBox.width;
        axis = axis.reverse();
      }

      // Move the box to the specified position. This may not be its best
      // position.
      boxPosition.move(initialAxis, position);

    } else {
      // If we have a percentage line value for the cue.
      var calculatedPercentage = (boxPosition.lineHeight / containerBox.height) * 100;

      switch (cue.lineAlign) {
      case "middle":
        linePos -= (calculatedPercentage / 2);
        break;
      case "end":
        linePos -= calculatedPercentage;
        break;
      }

      // Apply initial line position to the cue box.
      switch (cue.vertical) {
      case "":
        styleBox.applyStyles({
          top: styleBox.formatStyle(linePos, "%")
        });
        break;
      case "rl":
        styleBox.applyStyles({
          left: styleBox.formatStyle(linePos, "%")
        });
        break;
      case "lr":
        styleBox.applyStyles({
          right: styleBox.formatStyle(linePos, "%")
        });
        break;
      }

      axis = [ "+y", "-x", "+x", "-y" ];

      // Get the box position again after we've applied the specified positioning
      // to it.
      boxPosition = new BoxPosition(styleBox);
    }

    var bestPosition = findBestPosition(boxPosition, axis);
    styleBox.move(bestPosition.toCSSCompatValues(containerBox));
  }

  function WebVTT() {
    // Nothing
  }

  // Helper to allow strings to be decoded instead of the default binary utf8 data.
  WebVTT.StringDecoder = function() {
    return {
      decode: function(data) {
        if (!data) {
          return "";
        }
        if (typeof data !== "string") {
          throw new Error("Error - expected string data.");
        }
        return decodeURIComponent(encodeURIComponent(data));
      }
    };
  };

  WebVTT.convertCueToDOMTree = function(window, cuetext) {
    if (!window || !cuetext) {
      return null;
    }
    return parseContent(window, cuetext);
  };

  var FONT_SIZE_PERCENT = 0.05;
  var FONT_STYLE = "sans-serif";
  var CUE_BACKGROUND_PADDING = "1.5%";

  // Runs the processing model over the cues and regions passed to it.
  // @param overlay A block level element (usually a div) that the computed cues
  //                and regions will be placed into.
  WebVTT.processCues = function(window, cues, overlay) {
    if (!window || !cues || !overlay) {
      return null;
    }

    // Remove all previous children.
    while (overlay.firstChild) {
      overlay.removeChild(overlay.firstChild);
    }

    var paddedOverlay = window.document.createElement("div");
    paddedOverlay.style.position = "absolute";
    paddedOverlay.style.left = "0";
    paddedOverlay.style.right = "0";
    paddedOverlay.style.top = "0";
    paddedOverlay.style.bottom = "0";
    paddedOverlay.style.margin = CUE_BACKGROUND_PADDING;
    overlay.appendChild(paddedOverlay);

    // Determine if we need to compute the display states of the cues. This could
    // be the case if a cue's state has been changed since the last computation or
    // if it has not been computed yet.
    function shouldCompute(cues) {
      for (var i = 0; i < cues.length; i++) {
        if (cues[i].hasBeenReset || !cues[i].displayState) {
          return true;
        }
      }
      return false;
    }

    // We don't need to recompute the cues' display states. Just reuse them.
    if (!shouldCompute(cues)) {
      for (var i = 0; i < cues.length; i++) {
        paddedOverlay.appendChild(cues[i].displayState);
      }
      return;
    }

    var boxPositions = [],
        containerBox = BoxPosition.getSimpleBoxPosition(paddedOverlay),
        fontSize = Math.round(containerBox.height * FONT_SIZE_PERCENT * 100) / 100;
    var styleOptions = {
      font: fontSize + "px " + FONT_STYLE
    };

    (function() {
      var styleBox, cue;

      for (var i = 0; i < cues.length; i++) {
        cue = cues[i];

        // Compute the intial position and styles of the cue div.
        styleBox = new CueStyleBox(window, cue, styleOptions);
        paddedOverlay.appendChild(styleBox.div);

        // Move the cue div to it's correct line position.
        moveBoxToLinePosition(window, styleBox, containerBox, boxPositions);

        // Remember the computed div so that we don't have to recompute it later
        // if we don't have too.
        cue.displayState = styleBox.div;

        boxPositions.push(BoxPosition.getSimpleBoxPosition(styleBox));
      }
    })();
  };

  WebVTT.Parser = function(window, vttjs, decoder) {
    if (!decoder) {
      decoder = vttjs;
      vttjs = {};
    }
    if (!vttjs) {
      vttjs = {};
    }

    this.window = window;
    this.vttjs = vttjs;
    this.state = "INITIAL";
    this.buffer = "";
    this.decoder = decoder || new TextDecoder("utf8");
    this.regionList = [];
  };

  WebVTT.Parser.prototype = {
    // If the error is a ParsingError then report it to the consumer if
    // possible. If it's not a ParsingError then throw it like normal.
    reportOrThrowError: function(e) {
      if (e instanceof ParsingError) {
        this.onparsingerror && this.onparsingerror(e);
      } else {
        throw e;
      }
    },
    parse: function (data) {
      var self = this;

      // If there is no data then we won't decode it, but will just try to parse
      // whatever is in buffer already. This may occur in circumstances, for
      // example when flush() is called.
      if (data) {
        // Try to decode the data that we received.
        self.buffer += self.decoder.decode(data, {stream: true});
      }

      function collectNextLine() {
        var buffer = self.buffer;
        var pos = 0;
        while (pos < buffer.length && buffer[pos] !== '\r' && buffer[pos] !== '\n') {
          ++pos;
        }
        var line = buffer.substr(0, pos);
        // Advance the buffer early in case we fail below.
        if (buffer[pos] === '\r') {
          ++pos;
        }
        if (buffer[pos] === '\n') {
          ++pos;
        }
        self.buffer = buffer.substr(pos);
        return line;
      }

      // 3.4 WebVTT region and WebVTT region settings syntax
      function parseRegion(input) {
        var settings = new Settings();

        parseOptions(input, function (k, v) {
          switch (k) {
          case "id":
            settings.set(k, v);
            break;
          case "width":
            settings.percent(k, v);
            break;
          case "lines":
            settings.integer(k, v);
            break;
          case "regionanchor":
          case "viewportanchor":
            var xy = v.split(',');
            if (xy.length !== 2) {
              break;
            }
            // We have to make sure both x and y parse, so use a temporary
            // settings object here.
            var anchor = new Settings();
            anchor.percent("x", xy[0]);
            anchor.percent("y", xy[1]);
            if (!anchor.has("x") || !anchor.has("y")) {
              break;
            }
            settings.set(k + "X", anchor.get("x"));
            settings.set(k + "Y", anchor.get("y"));
            break;
          case "scroll":
            settings.alt(k, v, ["up"]);
            break;
          }
        }, /=/, /\s/);

        // Create the region, using default values for any values that were not
        // specified.
        if (settings.has("id")) {
          var region = new (self.vttjs.VTTRegion || self.window.VTTRegion)();
          region.width = settings.get("width", 100);
          region.lines = settings.get("lines", 3);
          region.regionAnchorX = settings.get("regionanchorX", 0);
          region.regionAnchorY = settings.get("regionanchorY", 100);
          region.viewportAnchorX = settings.get("viewportanchorX", 0);
          region.viewportAnchorY = settings.get("viewportanchorY", 100);
          region.scroll = settings.get("scroll", "");
          // Register the region.
          self.onregion && self.onregion(region);
          // Remember the VTTRegion for later in case we parse any VTTCues that
          // reference it.
          self.regionList.push({
            id: settings.get("id"),
            region: region
          });
        }
      }

      // 3.2 WebVTT metadata header syntax
      function parseHeader(input) {
        parseOptions(input, function (k, v) {
          switch (k) {
          case "Region":
            // 3.3 WebVTT region metadata header syntax
            parseRegion(v);
            break;
          }
        }, /:/);
      }

      // 5.1 WebVTT file parsing.
      try {
        var line;
        if (self.state === "INITIAL") {
          // We can't start parsing until we have the first line.
          if (!/\r\n|\n/.test(self.buffer)) {
            return this;
          }

          line = collectNextLine();

          var m = line.match(/^WEBVTT([ \t].*)?$/);
          if (!m || !m[0]) {
            throw new ParsingError(ParsingError.Errors.BadSignature);
          }

          self.state = "HEADER";
        }

        var alreadyCollectedLine = false;
        while (self.buffer) {
          // We can't parse a line until we have the full line.
          if (!/\r\n|\n/.test(self.buffer)) {
            return this;
          }

          if (!alreadyCollectedLine) {
            line = collectNextLine();
          } else {
            alreadyCollectedLine = false;
          }

          switch (self.state) {
          case "HEADER":
            // 13-18 - Allow a header (metadata) under the WEBVTT line.
            if (/:/.test(line)) {
              parseHeader(line);
            } else if (!line) {
              // An empty line terminates the header and starts the body (cues).
              self.state = "ID";
            }
            continue;
          case "NOTE":
            // Ignore NOTE blocks.
            if (!line) {
              self.state = "ID";
            }
            continue;
          case "ID":
            // Check for the start of NOTE blocks.
            if (/^NOTE($|[ \t])/.test(line)) {
              self.state = "NOTE";
              break;
            }
            // 19-29 - Allow any number of line terminators, then initialize new cue values.
            if (!line) {
              continue;
            }
            self.cue = new (self.vttjs.VTTCue || self.window.VTTCue)(0, 0, "");
            self.state = "CUE";
            // 30-39 - Check if self line contains an optional identifier or timing data.
            if (line.indexOf("-->") === -1) {
              self.cue.id = line;
              continue;
            }
            // Process line as start of a cue.
            /*falls through*/
          case "CUE":
            // 40 - Collect cue timings and settings.
            try {
              parseCue(line, self.cue, self.regionList);
            } catch (e) {
              self.reportOrThrowError(e);
              // In case of an error ignore rest of the cue.
              self.cue = null;
              self.state = "BADCUE";
              continue;
            }
            self.state = "CUETEXT";
            continue;
          case "CUETEXT":
            var hasSubstring = line.indexOf("-->") !== -1;
            // 34 - If we have an empty line then report the cue.
            // 35 - If we have the special substring '-->' then report the cue,
            // but do not collect the line as we need to process the current
            // one as a new cue.
            if (!line || hasSubstring && (alreadyCollectedLine = true)) {
              // We are done parsing self cue.
              self.oncue && self.oncue(self.cue);
              self.cue = null;
              self.state = "ID";
              continue;
            }
            if (self.cue.text) {
              self.cue.text += "\n";
            }
            self.cue.text += line;
            continue;
          case "BADCUE": // BADCUE
            // 54-62 - Collect and discard the remaining cue.
            if (!line) {
              self.state = "ID";
            }
            continue;
          }
        }
      } catch (e) {
        self.reportOrThrowError(e);

        // If we are currently parsing a cue, report what we have.
        if (self.state === "CUETEXT" && self.cue && self.oncue) {
          self.oncue(self.cue);
        }
        self.cue = null;
        // Enter BADWEBVTT state if header was not parsed correctly otherwise
        // another exception occurred so enter BADCUE state.
        self.state = self.state === "INITIAL" ? "BADWEBVTT" : "BADCUE";
      }
      return this;
    },
    flush: function () {
      var self = this;
      try {
        // Finish decoding the stream.
        self.buffer += self.decoder.decode();
        // Synthesize the end of the current cue or region.
        if (self.cue || self.state === "HEADER") {
          self.buffer += "\n\n";
          self.parse();
        }
        // If we've flushed, parsed, and we're still on the INITIAL state then
        // that means we don't have enough of the stream to parse the first
        // line.
        if (self.state === "INITIAL") {
          throw new ParsingError(ParsingError.Errors.BadSignature);
        }
      } catch(e) {
        self.reportOrThrowError(e);
      }
      self.onflush && self.onflush();
      return this;
    }
  };

  global.WebVTT = WebVTT;

}(this, (this.vttjs || {})));
