video.js

/*
VideoJS - HTML5 Video Player
v1.1.3

This file is part of VideoJS. Copyright 2010 Zencoder, Inc.

VideoJS is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

VideoJS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with VideoJS.  If not, see <http://www.gnu.org/licenses/>.
*/

// Using jresig's Class implementation http://ejohn.org/blog/simple-javascript-inheritance/
(function(){var initializing=false, fnTest=/xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/; this.JRClass = function(){}; JRClass.extend = function(prop) { var _super = this.prototype; initializing = true; var prototype = new this(); initializing = false; for (var name in prop) { prototype[name] = typeof prop[name] == "function" && typeof _super[name] == "function" && fnTest.test(prop[name]) ? (function(name, fn){ return function() { var tmp = this._super; this._super = _super[name]; var ret = fn.apply(this, arguments); this._super = tmp; return ret; }; })(name, prop[name]) : prop[name]; } function JRClass() { if ( !initializing && this.init ) this.init.apply(this, arguments); } JRClass.prototype = prototype; JRClass.constructor = JRClass; JRClass.extend = arguments.callee; return JRClass;};})();

// Video JS Player Class
var VideoJS = JRClass.extend({

  // Initialize the player for the supplied video tag element
  // element: video tag
  init: function(element, setOptions){

    // Allow an ID string or an element
    if (typeof element == 'string') {
      this.video = document.getElementById(element);
    } else {
      this.video = element;
    }

    // Store reference to player on the video element.
    // So you can acess the player later: document.getElementById("video_id").player.play();
    this.video.player = this;

    // Default Options
    this.options = {
      controlsBelow: false, // Display control bar below video vs. in front of
      controlsHiding: true, // Hide controls when not over the video
      defaultVolume: 0.85, // Will be overridden by localStorage volume if available
      flashVersion: 9, // Required flash version for fallback
      linksHiding: true, // Hide download links when video is supported
      flashIsDominant: false, // Always use Flash when available
      useBrowserControls: false // Dont' use the video JS controls (iPhone)
    };

    // Override default options with global options
    if (typeof VideoJS.options == "object") { _V_.merge(this.options, VideoJS.options); }

    // Override global options with options specific to this video
    if (typeof setOptions == "object") { _V_.merge(this.options, setOptions); }

    // Store reference to embed code pieces
    this.box = this.video.parentNode;
    this.flashFallback = this.getFlashFallback();
    this.linksFallback = this.getLinksFallback();

    // Hide download links if video can play
    // Flash fallback can't be found in IE. Maybe add video as an element like modernizr so it can contain elements.
    if(VideoJS.browserSupportsVideo() || ((this.flashFallback || VideoJS.isIE()) && this.flashVersionSupported())) {
      this.hideLinksFallback();
    }

    // Check if browser can play HTML5 video
    if (VideoJS.browserSupportsVideo()) {
      // Force flash fallback when there's no supported source, or flash is dominant
      if (!this.canPlaySource() || (this.options.flashIsDominant && this.flashVersionSupported())) {
        this.replaceWithFlash();
        return;
      }
    } else {
      return;
    }

    // Force the video source
    // Helps fix loading bugs in a handful of devices, like the iPad/iPhone poster bug
    // And iPad/iPhone javascript include location bug
    // And Android type attribute bug
    this.video.src = this.firstPlayableSource.src; // From canPlaySource()

    if (VideoJS.isIpad() || VideoJS.isIphone() || VideoJS.isAndroid()) {
      this.video.load(); // 2nd step of forcing the source
      return; // Use the devices default controls
    }

    if (this.options.useBrowserControls == false) {
      // Hide default controls
      this.video.controls = false;
    }

    // Support older browsers that used autobuffer
    this.fixPreloading();

    if (this.options.controlsBelow) {
      _V_.addClass(this.box, "vjs-controls-below");
    }

    // Store amount of video loaded
    this.percentLoaded = 0;

    this.buildPoster();
    this.showPoster();

    this.buildController();
    this.showController();

    // Position & show controls when data is loaded
    this.video.addEventListener("loadeddata", this.onLoadedData.context(this), false);

    // Listen for when the video is played
    this.video.addEventListener("play", this.onPlay.context(this), false);
    // Listen for when the video is paused
    this.video.addEventListener("pause", this.onPause.context(this), false);
    // Listen for when the video ends
    this.video.addEventListener("ended", this.onEnded.context(this), false);
    // Listen for a volume change
    this.video.addEventListener('volumechange',this.onVolumeChange.context(this),false);
    // Listen for video errors
    this.video.addEventListener('error',this.onError.context(this),false);
    // Listen for Video Load Progress (currently does not if html file is local)
    this.video.addEventListener('progress', this.onProgress.context(this), false);
    // Set interval for load progress using buffer watching method
    this.watchBuffer = setInterval(this.updateBufferedTotal.context(this), 33);
    // Listen for Video time update
    this.video.addEventListener('timeupdate', this.onTimeUpdate.context(this), false);

    // Listen for clicks on the play/pause button
    this.playControl.addEventListener("click", this.onPlayControlClick.context(this), false);
    // Make a click on the video act like a click on the play button.
    this.video.addEventListener("click", this.onPlayControlClick.context(this), false);
    // Make a click on the poster act like a click on the play button.
    if (this.poster) { this.poster.addEventListener("click", this.onPlayControlClick.context(this), false); }

    // Listen for drags on the progress bar
    this.progressHolder.addEventListener("mousedown", this.onProgressHolderMouseDown.context(this), false);
    // Listen for a release on the progress bar
    this.progressHolder.addEventListener("mouseup", this.onProgressHolderMouseUp.context(this), false);

    // Set to stored volume OR 85%
    this.setVolume(localStorage.volume || this.options.defaultVolume);
    // Listen for a drag on the volume control
    this.volumeControl.addEventListener("mousedown", this.onVolumeControlMouseDown.context(this), false);
    // Listen for a release on the volume control
    this.volumeControl.addEventListener("mouseup", this.onVolumeControlMouseUp.context(this), false);
    // Set the display to the initial volume
    this.updateVolumeDisplay();

    // Listen for clicks on the button
    this.fullscreenControl.addEventListener("click", this.onFullscreenControlClick.context(this), false);

    // Listen for the mouse move the video. Used to reveal the controller.
    this.box.addEventListener("mousemove", this.onVideoMouseMove.context(this), false);
    // Listen for the mouse moving out of the video. Used to hide the controller.
    this.box.addEventListener("mouseout", this.onVideoMouseOut.context(this), false);

    if (this.poster) {
      // Listen for the mouse move the poster image. Used to reveal the controller.
      this.poster.addEventListener("mousemove", this.onVideoMouseMove.context(this), false);
      // Listen for the mouse moving out of the poster image. Used to hide the controller.
      this.poster.addEventListener("mouseout", this.onVideoMouseOut.context(this), false);
    }

    // Block hiding when over controls
    this.controls.addEventListener("mousemove", this.onControlsMouseMove.context(this), false);
    
    // Release controls hiding block, and call VideoMouseOut
    this.controls.addEventListener("mouseout", this.onControlsMouseOut.context(this), false);

    // Load subtitles. Based on http://matroska.org/technical/specs/subtitles/srt.html
    this.subtitlesSource = this.video.getAttribute("data-subtitles");
    if (this.subtitlesSource !== null) {
      this.loadSubtitles();
      this.buildSubtitles();
    }

    /* Removeable Event Listeners with Context
    ================================================================================ */
    // Creating during initialization to add context
    // and because it has to be removed with removeEventListener

    // Create listener for esc key while in full screen mode
    this.onEscKey = function(event){
      if (event.keyCode == 27) {
        this.fullscreenOff();
      }
    }.context(this);

    this.onWindowResize = function(event){
      this.positionController();
    }.context(this);

    this.onProgressMouseMove = function(event){
      this.setPlayProgressWithEvent(event);
    }.context(this);

    this.onProgressMouseUp = function(event){
      _V_.unblockTextSelection();

      document.removeEventListener("mousemove", this.onProgressMouseMove, false);
      document.removeEventListener("mouseup", this.onProgressMouseUp, false);

      if (this.videoWasPlaying) {
        this.video.play();
        this.trackPlayProgress();
      }
    }.context(this);

    this.onVolumeMouseMove = function(event){
      this.setVolumeWithEvent(event);
    }.context(this);

    this.onVolumeMouseUp = function(event){
      _V_.unblockTextSelection();
      document.removeEventListener("mousemove", this.onVolumeMouseMove, false);
      document.removeEventListener("mouseup", this.onVolumeMouseUp, false);
    }.context(this);

  },

  // Support older browsers that used "autobuffer"
  fixPreloading: function(){
    if (typeof this.video.hasAttribute == "function" && this.video.hasAttribute("preload")) {
      this.video.autobuffer = true; // Was a boolean
      this.video.load();
    } else {
      this.video.autobuffer = false;
      this.video.preload = "none";
    }
  },

  // Translate functionality
  play: function(){ this.video.play(); },
  pause: function(){ this.video.pause(); },
  width: function(width){
    this.video.width = width;
    this.box.width = width;
    // Width isn't working for the poster
    this.poster.style.width = width+"px";
    this.positionController();
    return this;
  },
  height: function(height){
    this.video.height = height;
    this.box.height = height;
    this.poster.style.height = height+"px";
    this.positionController();
    return this;
  },

  buildController: function(){

    /* Creating this HTML
      <ul class="vjs-controls">
        <li class="vjs-play-control vjs-play">
          <span></span>
        </li>
        <li class="vjs-progress-control">
          <ul class="vjs-progress-holder">
            <li class="vjs-load-progress"></li>
            <li class="vjs-play-progress"></li>
          </ul>
        </li>
        <li class="vjs-time-control">
          <span class="vjs-current-time-display">00:00</span><span> / </span><span class="vjs-duration-display">00:00</span>
        </li>
        <li class="vjs-volume-control">
          <ul>
            <li></li><li></li><li></li><li></li><li></li><li></li>
          </ul>
        </li>
        <li class="vjs-fullscreen-control">
          <ul>
            <li></li><li></li><li></li><li></li>
          </ul>
        </li>
      </ul>
    */

    // Create a list element to hold the different controls
    this.controls = _V_.createElement("ul", { className: "vjs-controls" });
    // Add the controls to the video's container
    this.video.parentNode.appendChild(this.controls);

    // Build the play control
    this.playControl = _V_.createElement("li", { className: "vjs-play-control vjs-play", innerHTML: "<span></span>" });
    this.controls.appendChild(this.playControl);

    // Build the progress control
    this.progressControl = _V_.createElement("li", { className: "vjs-progress-control" });
    this.controls.appendChild(this.progressControl);

    // Create a holder for the progress bars
    this.progressHolder = _V_.createElement("ul", { className: "vjs-progress-holder" });
    this.progressControl.appendChild(this.progressHolder);

    // Create the loading progress display
    this.loadProgress = _V_.createElement("li", { className: "vjs-load-progress" });
    this.progressHolder.appendChild(this.loadProgress);

    // Create the playing progress display
    this.playProgress = _V_.createElement("li", { className: "vjs-play-progress" });
    this.progressHolder.appendChild(this.playProgress);

    // Create the progress time display (00:00 / 00:00)
    this.timeControl = _V_.createElement("li", { className: "vjs-time-control" });
    this.controls.appendChild(this.timeControl);

    // Create the current play time display
    this.currentTimeDisplay = _V_.createElement("span", { className: "vjs-current-time-display", innerHTML: "00:00" });
    this.timeControl.appendChild(this.currentTimeDisplay);

    // Add time separator
    this.timeSeparator = _V_.createElement("span", { innerHTML: " / " });
    this.timeControl.appendChild(this.timeSeparator);

    // Create the total duration display
    this.durationDisplay = _V_.createElement("span", { className: "vjs-duration-display", innerHTML: "00:00" });
    this.timeControl.appendChild(this.durationDisplay);

    // Create the volumne control
    this.volumeControl = _V_.createElement("li", {
      className: "vjs-volume-control",
      innerHTML: "<ul><li></li><li></li><li></li><li></li><li></li><li></li></ul>"
    });
    this.controls.appendChild(this.volumeControl);
    this.volumeDisplay = this.volumeControl.children[0];

    // Crete the fullscreen control
    this.fullscreenControl = _V_.createElement("li", {
      className: "vjs-fullscreen-control",
      innerHTML: "<ul><li></li><li></li><li></li><li></li></ul>"
    });
    this.controls.appendChild(this.fullscreenControl);
  },

  // Get the download links block element
  getLinksFallback: function(){
    return this.box.getElementsByTagName("P")[0];
  },

  // Hide no-video download paragraph
  hideLinksFallback: function(){
    if (this.options.linksHiding && this.linksFallback) { this.linksFallback.style.display = "none"; }
  },

  getFlashFallback: function(){
    if (VideoJS.isIE()) { return; }
    var children = this.box.getElementsByClassName("vjs-flash-fallback");
    for (var i=0,j=children.length; i<j; i++) {
      return children[i];
    }
  },

  replaceWithFlash: function(){
    // this.flashFallback = this.video.removeChild(this.flashFallback);
    if (this.flashFallback) {
      this.box.insertBefore(this.flashFallback, this.video);
      this.video.style.display = "none"; // Removing it was breaking later players
    }
  },

  // Show the controller
  showController: function(){
    this.controls.style.display = "block";
    this.positionController();
  },

  // Place controller relative to the video's position
  positionController: function(){
    // Make sure the controls are visible
    if (this.controls.style.display == 'none') { return; }

    // Sometimes the CSS styles haven't been applied to the controls yet
    // when we're trying to calculate the height and position them correctly.
    // This causes a flicker where the controls are out of place.
    // Best way I can think of to test this is to check if the width of all the controls are the same.
    // If so, hide the controller and delay positioning them briefly.
    if (this.playControl.offsetWidth == this.progressControl.offsetWidth
     && this.playControl.offsetWidth == this.timeControl.offsetWidth
     && this.playControl.offsetWidth == this.volumeControl.offsetWidth) {
       // Don't want to create an endless loop either.
       if (!this.positionRetries) { this.positionRetries = 1; }
       if (this.positionRetries++ < 100) {
         this.controls.style.display = "none";
         setTimeout(this.showController.context(this),0);
         return;
       }
    }

    // Set width based on fullscreen or not.
    if (this.videoIsFullScreen) {
      this.box.style.width = "";
    } else {
      this.box.style.width = this.video.offsetWidth + "px";
    }

    if (this.options.controlsBelow) {
      if (this.videoIsFullScreen) {
        this.box.style.height = "";
        this.video.style.height = (this.box.offsetHeight - this.controls.offsetHeight) + "px";
      } else {
        this.video.style.height = "";
        this.box.style.height = this.video.offsetHeight + this.controls.offsetHeight + "px";
      }
      this.controls.style.top = this.video.offsetHeight + "px";
    } else {
      this.controls.style.top = (this.video.offsetHeight - this.controls.offsetHeight) + "px";
    }

    this.sizeProgressBar();
  },

  // Hide the controller
  hideController: function(){
    if (this.options.controlsHiding && !this.mouseIsOverControls) { this.controls.style.display = "none"; }
  },

  // Update poster source from attribute or fallback image
  // iPad breaks if you include a poster attribute, so this fixes that
  updatePosterSource: function(){
    if (!this.video.poster) {
      var images = this.video.getElementsByTagName("img");
      if (images.length > 0) { this.video.poster = images[0].src; }
    }
  },

  buildPoster: function(){
    this.updatePosterSource();
    if (this.video.poster) {
      this.poster = document.createElement("img");
      // Add poster to video box
      this.video.parentNode.appendChild(this.poster);

      // Add poster image data
      this.poster.src = this.video.poster;
      // Add poster styles
      this.poster.className = "vjs-poster";
    } else {
      this.poster = false;
    }
  },

  // Add the video poster to the video's container, to fix autobuffer/preload bug
  showPoster: function(){
    if (!this.poster) { return; }
    this.poster.style.display = "block";
    this.positionPoster();
  },

  // Size the poster image
  positionPoster: function(){
    // Only if the poster is visible
    if (!this.poster || this.poster.style.display == 'none') { return; }
    this.poster.style.height = this.video.offsetHeight + "px";
    this.poster.style.width = this.video.offsetWidth + "px";
  },

  hidePoster: function(){
    if (!this.poster) { return; }
    this.poster.style.display = "none";
  },

  canPlaySource: function(){
    var children = this.video.children;
    for (var i=0,j=children.length; i<j; i++) {
      if (children[i].tagName.toUpperCase() == "SOURCE") {
        var canPlay = this.video.canPlayType(children[i].type);
        if(canPlay == "probably" || canPlay == "maybe") {
          this.firstPlayableSource = children[i];
          return true;
        }
      }
    }
    return false;
  },

  // When the video is played
  onPlay: function(event){
    this.playControl.className = "vjs-play-control vjs-pause";
    this.hidePoster();
    this.trackPlayProgress();
  },

  // When the video is paused
  onPause: function(event){
    this.playControl.className = "vjs-play-control vjs-play";
    this.stopTrackingPlayProgress();
  },

  // When the video ends
  onEnded: function(event){
    this.video.pause();
    this.video.currentTime = 0;
    this.showPoster();
    this.onPause();
  },

  onVolumeChange: function(event){
    this.updateVolumeDisplay();
  },

  onError: function(event){
    console.log(event);
    console.log(this.video.error);
  },

  onLoadedData: function(event){
    this.showController();
  },

  // When the video's load progress is updated
  // Does not work in all browsers (Safari/Chrome 5)
  onProgress: function(event){
    if(event.total > 0) {
      this.setLoadProgress(event.loaded / event.total);
    }
  },

  // Buffer watching method for load progress.
  // Used for browsers that don't support the progress event
  updateBufferedTotal: function(){
    if (this.video.buffered) {
      if (this.video.buffered.length >= 1) {
        this.setLoadProgress(this.video.buffered.end(0) / this.video.duration);
        if (this.video.buffered.end(0) == this.video.duration) {
          clearInterval(this.watchBuffer);
        }
      }
    } else {
      clearInterval(this.watchBuffer);
    }
  },

  setLoadProgress: function(percentAsDecimal){
    if (percentAsDecimal > this.percentLoaded) {
      this.percentLoaded = percentAsDecimal;
      this.updateLoadProgress();
    }
  },

  updateLoadProgress: function(){
    if (this.controls.style.display == 'none') { return; }
    this.loadProgress.style.width = (this.percentLoaded * (_V_.getComputedStyleValue(this.progressHolder, "width").replace("px", ""))) + "px";
  },

  // React to clicks on the play/pause button
  onPlayControlClick: function(event){
    if (this.video.paused) {
      this.video.play();
    } else {
      this.video.pause();
    }
  },

  // Adjust the play position when the user drags on the progress bar
  onProgressHolderMouseDown: function(event){
    this.stopTrackingPlayProgress();

    if (this.video.paused) {
      this.videoWasPlaying = false;
    } else {
      this.videoWasPlaying = true;
      this.video.pause();
    }

    _V_.blockTextSelection();

    this.setPlayProgressWithEvent(event);
    document.addEventListener("mousemove", this.onProgressMouseMove, false);
    document.addEventListener("mouseup", this.onProgressMouseUp, false);

  },

  // When the user stops dragging on the progress bar, update play position
  // Backup for when the user only clicks and doesn't drag
  onProgressHolderMouseUp: function(event){
    this.setPlayProgressWithEvent(event);

    // Fixe for a play button state issue.
    if (this.video.paused) {
      this.onPause();
    } else {
      this.onPlay();
    }
  },

  // Adjust the volume when the user drags on the volume control
  onVolumeControlMouseDown: function(event){
    _V_.blockTextSelection();
    this.setVolumeWithEvent(event);
    document.addEventListener("mousemove", this.onVolumeMouseMove, false);
    document.addEventListener("mouseup", this.onVolumeMouseUp, false);
  },

  // When the user stops dragging, set a new volume
  // Backup for when the user only clicks and doesn't drag
  onVolumeControlMouseUp: function(event){
    this.setVolumeWithEvent(event);
  },

  // When the user clicks on the fullscreen button, update fullscreen setting
  onFullscreenControlClick: function(event){
    if (!this.videoIsFullScreen) {
      this.fullscreenOn();
    } else {
      this.fullscreenOff();
    }
  },

  onControlsMouseMove: function(){
    // Block controls from hiding when mouse is over them.
    this.mouseIsOverControls = true;
  },
  
  onControlsMouseOut: function(event){
    this.mouseIsOverControls = false;
    // Have to add the video mouseout to the controller too or it may not hide.
    this.onVideoMouseOut(event);
  },

  onVideoMouseMove: function(){
    this.showController();
    clearInterval(this.mouseMoveTimeout);
    this.mouseMoveTimeout = setTimeout(function(){ this.hideController(); }.context(this), 4000);
  },

  onVideoMouseOut: function(event){
    // Prevent flicker by making sure mouse hasn't left the video
    var parent = event.relatedTarget;
    while (parent && parent !== this.video && parent !== this.controls) {
      parent = parent.parentNode;
    }
    if (parent !== this.video && parent !== this.controls) {
      this.hideController();
    }
  },

  // Adjust the width of the progress bar to fill the controls width
  sizeProgressBar: function(){
    this.updatePlayProgress();
    this.updateLoadProgress();
  },

  // Get the space between controls. For more flexible styling.
  getControlsPadding: function(){
    return _V_.findPosX(this.playControl) - _V_.findPosX(this.controls);
  },

  // When dynamically placing controls, if there are borders on the controls, it can break to a new line.
  getControlBorderAdjustment: function(){
    var leftBorder = parseInt(_V_.getComputedStyleValue(this.playControl, "border-left-width").replace("px", ""), 10);
    var rightBorder = parseInt(_V_.getComputedStyleValue(this.playControl, "border-right-width").replace("px", ""), 10);
    return leftBorder + rightBorder;
  },

  // Track & display the current play progress
  trackPlayProgress: function(){
    if(this.playProgressInterval) { clearInterval(this.playProgressInterval); }
    this.playProgressInterval = setInterval(function(){ this.updatePlayProgress(); }.context(this), 33);
  },

  // Turn off play progress tracking (when paused)
  stopTrackingPlayProgress: function(){
    clearInterval(this.playProgressInterval);
  },

  // Ajust the play progress bar's width based on the current play time
  updatePlayProgress: function(){
    if (this.controls.style.display == 'none') { return; }
    this.playProgress.style.width = ((this.video.currentTime / this.video.duration) * (_V_.getComputedStyleValue(this.progressHolder, "width").replace("px", ""))) + "px";
    this.updateTimeDisplay();
  },

  // Update the play position based on where the user clicked on the progresss bar
  setPlayProgress: function(newProgress){
    this.video.currentTime = newProgress * this.video.duration;
    this.playProgress.style.width = newProgress * (_V_.getComputedStyleValue(this.progressHolder, "width").replace("px", "")) + "px";
    this.updateTimeDisplay();
    // currentTime changed, reset subtitles
    if (!this.subtitles) { this.currentSubtitlePosition = 0; }
  },

  setPlayProgressWithEvent: function(event){
    var newProgress = _V_.getRelativePosition(event.pageX, this.progressHolder);
    this.setPlayProgress(newProgress);
  },

  // Update the displayed time (00:00)
  updateTimeDisplay: function(){
    this.currentTimeDisplay.innerHTML = _V_.formatTime(this.video.currentTime);
    if (this.video.duration) { this.durationDisplay.innerHTML = _V_.formatTime(this.video.duration); }
  },

  // Set a new volume based on where the user clicked on the volume control
  setVolume: function(newVol){
    this.video.volume = parseFloat(newVol);
    localStorage.volume = this.video.volume;
  },

  setVolumeWithEvent: function(event){
    var newVol = _V_.getRelativePosition(event.pageX, this.volumeControl.children[0]);
    this.setVolume(newVol);
  },

  // Update the volume control display
  // Unique to these default controls. Uses borders to create the look of bars.
  updateVolumeDisplay: function(){
    var volNum = Math.ceil(this.video.volume * 6);
    for(var i=0; i<6; i++) {
      if (i < volNum) {
        _V_.addClass(this.volumeDisplay.children[i], "vjs-volume-level-on");
      } else {
        _V_.removeClass(this.volumeDisplay.children[i], "vjs-volume-level-on");
      }
    }
  },

  // Check if browser can use this flash player
  flashVersionSupported: function(){
    return VideoJS.getFlashVersion() >= this.options.flashVersion;
  },

  /* Fullscreen / Full-window
  ================================================================================ */
  // Turn on fullscreen (window) mode
  // Real fullscreen isn't available in browsers quite yet.
  fullscreenOn: function(){
    if (!this.nativeFullscreenOn()) {
      this.videoIsFullScreen = 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
      document.addEventListener("keydown", this.onEscKey, false);

      // Add listener for a window resize
      window.addEventListener("resize", this.onWindowResize, false);

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

      // Apply fullscreen styles
      _V_.addClass(this.box, "vjs-fullscreen");

      // Resize the controller and poster
      this.positionController();
      this.positionPoster();
    }
  },

  nativeFullscreenOn: function(){
    if(typeof this.video.webkitEnterFullScreen == 'function') {
      // Seems to be broken in Chromium/Chrome
      if (!navigator.userAgent.match("Chrome")) {
        this.video.webkitEnterFullScreen();
        return true;
      }
    }
  },

  // Turn off fullscreen (window) mode
  fullscreenOff: function(){
    this.videoIsFullScreen = false;

    document.removeEventListener("keydown", this.onEscKey, false);
    window.removeEventListener("resize", this.onWindowResize, false);

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

    // Remove fullscreen styles
    _V_.removeClass(this.box, "vjs-fullscreen");

    // Resize to original settings
    this.positionController();
    this.positionPoster();
  },

  /* Subtitles
  ================================================================================ */
  loadSubtitles: function() {
    if (typeof XMLHttpRequest == "undefined") {
      XMLHttpRequest = function () {
        try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); }
          catch (e) {}
        try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); }
          catch (f) {}
        try { return new ActiveXObject("Msxml2.XMLHTTP"); }
          catch (g) {}
        //Microsoft.XMLHTTP points to Msxml2.XMLHTTP.3.0 and is redundant
        throw new Error("This browser does not support XMLHttpRequest.");
      };
    }
    var request = new XMLHttpRequest();
    request.open("GET",this.subtitlesSource);
    request.onreadystatechange = function() {
      if (request.readyState == 4 && request.status == 200) {
        this.parseSubtitles(request.responseText);
      }
    }.context(this);
    request.send();
  },

  parseSubtitles: function(subText) {
    var lines = subText.replace("\r",'').split("\n");
    this.subtitles = [];
    this.currentSubtitlePosition = 0;

    var i = 0;
    while(i<lines.length) {
      // define the current subtitle object
      var subtitle = {};
      // get the number
      subtitle.id = lines[i++];
      if (!subtitle.id) {
        break;
      }

      // get time
      var time = lines[i++].split(" --> ");
      subtitle.startTime = this.parseSubtitleTime(time[0]);
      subtitle.endTime = this.parseSubtitleTime(time[1]);

      // get subtitle text
      var text = [];
      while(lines[i].length>0 && lines[i]!="\r") {
        text.push(lines[i++]);
      }
      subtitle.text = text.join('<br/>');

      // add this subtitle
      this.subtitles.push(subtitle);

      // ignore the blank line
      i++;
    }
  },

  parseSubtitleTime: function(timeText) {
    var parts = timeText.split(':');
    var time = 0;
    // hours => seconds
    time += parseFloat(parts[0])*60*60;
    // minutes => seconds
    time += parseFloat(parts[1])*60;
    // get seconds
    var seconds = parts[2].split(',');
    time += parseFloat(seconds[0]);
    // add miliseconds
    time = time + parseFloat(seconds[1])/1000;
    return time;
  },

  buildSubtitles: function(){
    /* Creating this HTML
      <div class="vjs-subtitles">
      </div>
    */
    this.subtitlesDiv = _V_.createElement("div", { className: 'vjs-subtitles' });
    this.video.parentNode.appendChild(this.subtitlesDiv);
  },

  onTimeUpdate: function(){
    // show the subtitles
    if (this.subtitles) {
      var x = this.currentSubtitlePosition;

      while (x<this.subtitles.length && this.video.currentTime>this.subtitles[x].endTime) {
        if (this.subtitles[x].showing) {
          this.subtitles[x].showing = false;
          this.subtitlesDiv.innerHTML = "";
        }
        this.currentSubtitlePosition++;
        x = this.currentSubtitlePosition;
      }

      if (this.currentSubtitlePosition>=this.subtitles.length) { return; }

      if (this.video.currentTime>=this.subtitles[x].startTime && this.video.currentTime<=this.subtitles[x].endTime) {
        this.subtitlesDiv.innerHTML = this.subtitles[x].text;
        this.subtitles[x].showing = true;
      }
    }
  }


  /* Device Fixes
  ================================================================================ */

  /* Using Default Controls for iPad now. Can't do native fullscreen through the iPad API */
  // For iPads, controls need to always show because there's no hover
  // The controls also have to be below for the full-window mode to work.
  // iPadFix: function(){
  //   this.options.controlsBelow = true;
  //   this.options.controlsHiding = false;
  // },

  /* The "force the source" fix should hopefully fix this as well now.
     Not sure if canPlayType works on Android though. */
  // For Androids, add the MP4 source directly to the video tag otherwise it will not play
  // androidFix: function() {
  //   var children = this.video.children;
  //   for (var i=0,j=children.length; i<j; i++) {
  //     if (children[i].tagName.toUpperCase() == "SOURCE" && children[i].src.match(/\.mp4$/i)) {
  //       this.video.src = children[i].src;
  //     }
  //   }
  // }

});

////////////////////////////////////////////////////////////////////////////////
// Convenience Functions (mini library)
// Functions not specific to video or VideoJS and could probably be replaced with a library like jQuery
////////////////////////////////////////////////////////////////////////////////
var _V_ = {
  addClass: function(element, classToAdd){
    if (element.className.split(/\s+/).lastIndexOf(classToAdd) == -1) { element.className = element.className === "" ? classToAdd : element.className + " " + classToAdd; }
  },

  removeClass: function(element, classToRemove){
    if (element.className.indexOf(classToRemove) == -1) { return; }
    var classNames = element.className.split(/\s+/);
    classNames.splice(classNames.lastIndexOf(classToRemove),1);
    element.className = classNames.join(" ");
  },

  merge: function(obj1, obj2){
    for(var attrname in obj2){
      if (obj2.hasOwnProperty(attrname)) {
        obj1[attrname]=obj2[attrname];
      }
    }
    return obj1;
  },

  createElement: function(tagName, attributes){
    return _V_.merge(document.createElement(tagName), attributes);
  },

  // Attempt to block the ability to select text while dragging controls
  blockTextSelection: function(){
    document.body.focus();
    document.onselectstart = function () { return false; };
  },

  // Turn off text selection blocking
  unblockTextSelection: function(){
    document.onselectstart = function () { return true; };
  },

  // Return seconds as MM:SS
  formatTime: function(secs) {
    var seconds = Math.round(secs);
    var minutes = Math.floor(seconds / 60);
    minutes = (minutes >= 10) ? minutes : "0" + minutes;
    seconds = Math.floor(seconds % 60);
    seconds = (seconds >= 10) ? seconds : "0" + seconds;
    return minutes + ":" + seconds;
  },

  // Return the relative horizonal position of an event as a value from 0-1
  getRelativePosition: function(x, relativeElement){
    return Math.max(0, Math.min(1, (x - _V_.findPosX(relativeElement)) / relativeElement.offsetWidth));
  },

  // Get an objects position on the page
  findPosX: function(obj) {
    var curleft = obj.offsetLeft;
    while(obj = obj.offsetParent) {
      curleft += obj.offsetLeft;
    }
    return curleft;
  },

  getComputedStyleValue: function(element, style){
    return window.getComputedStyle(element, null).getPropertyValue(style);
  },

  // DOM Ready functionality adapted from jQuery. http://jquery.com/
  bindDOMReady: function(){
    if (document.readyState === "complete") {
      return _V_.DOMReady();
    }
    if (document.addEventListener) {
      document.addEventListener("DOMContentLoaded", _V_.DOMContentLoaded, false);
      window.addEventListener("load", _V_.DOMReady, false);
    } else if (document.attachEvent) {
      document.attachEvent("onreadystatechange", _V_.DOMContentLoaded);
      window.attachEvent("onload", _V_.DOMReady);
    }
  },

  DOMContentLoaded: function(){
    if (document.addEventListener) {
      document.removeEventListener( "DOMContentLoaded", _V_.DOMContentLoaded, false);
      _V_.DOMReady();
    } else if ( document.attachEvent ) {
      if ( document.readyState === "complete" ) {
        document.detachEvent("onreadystatechange", _V_.DOMContentLoaded);
        _V_.DOMReady();
      }
    }
  },

  // Functions to be run once the DOM is loaded
  DOMReadyList: [],
  addToDOMReady: function(fn){
    if (_V_.DOMIsReady) {
      fn.call(document);
    } else {
      _V_.DOMReadyList.push(fn);
    }
  },

  DOMIsReady: false,
  DOMReady: function(){
    if (_V_.DOMIsReady) { return; }
    if (!document.body) { return setTimeout(_V_.DOMReady, 13); }
    _V_.DOMIsReady = true;
    if (_V_.DOMReadyList) {
      for (var i=0; i<_V_.DOMReadyList.length; i++) {
        _V_.DOMReadyList[i].call(document);
      }
      _V_.DOMReadyList = null;
    }
  }
};
_V_.bindDOMReady();

////////////////////////////////////////////////////////////////////////////////
// Class Methods
// Functions that don't apply to individual videos.
////////////////////////////////////////////////////////////////////////////////

// Add VideoJS to all video tags with the video-js class when the DOM is ready
VideoJS.setupAllWhenReady = function(options){
  // Options is stored globally, and added ot any new player on init
  VideoJS.options = options;
  VideoJS.DOMReady(VideoJS.setup);
};

// Run the supplied function when the DOM is ready
VideoJS.DOMReady = function(fn){
  _V_.addToDOMReady(fn);
};

// Set up a specific video or array of video elements
// "video" can be:
//    false, undefined, or "All": set up all videos with the video-js class
//    A video tag ID or video tag element: set up one video and return one player
//    An array of video tag elements/IDs: set up each and return an array of players
VideoJS.setup = function(videos, options){

  var returnSingular = false,
  playerList = [],
  videoElement;

  // If videos is undefined or "All", set up all videos with the video-js class
  if (!videos || videos == "All") {
    videos = VideoJS.getVideoJSTags();

  // If videos is not an array, add to an array
  } else if (typeof videos != 'object' || videos.nodeType == 1) {
    videos = [videos];
    returnSingular = true;
  }

  // Loop through videos and create players for them
  for (var i=0; i<videos.length; i++) {
    if (typeof videos[i] == 'string') {
      videoElement = document.getElementById(videos[i]);
    } else { // assume DOM object
      videoElement = videos[i];
    }
    playerList.push(new VideoJS(videoElement, options));
  }

  // Return one or all depending on what was passed in
  return (returnSingular) ? playerList[0] : playerList;
};

// Find video tags with the video-js class
VideoJS.getVideoJSTags = function() {
  var videoTags = document.getElementsByTagName("video"),
  videoJSTags = [], videoTag;

  for (var i=0,j=videoTags.length; i<j; i++) {
    videoTag = videoTags[i];
    if (videoTag.className.indexOf("video-js") != -1) {
      videoJSTags.push(videoTag);
    }
  }

  return videoJSTags;
};

// Check if the browser supports video.
VideoJS.browserSupportsVideo = function() {
  if (typeof VideoJS.videoSupport != "undefined") { return VideoJS.videoSupport; }
  VideoJS.videoSupport = !!document.createElement('video').canPlayType;
  return VideoJS.videoSupport;
};

VideoJS.getFlashVersion = function(){
  // Cache Version
  if (typeof VideoJS.flashVersion != "undefined") { return VideoJS.flashVersion; }
  var version = 0, desc;
  if (typeof navigator.plugins != "undefined" && typeof navigator.plugins["Shockwave Flash"] == "object") {
    desc = navigator.plugins["Shockwave Flash"].description;
    if (desc && !(typeof navigator.mimeTypes != "undefined" && navigator.mimeTypes["application/x-shockwave-flash"] && !navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin)) {
      version = parseInt(desc.match(/^.*\s+([^\s]+)\.[^\s]+\s+[^\s]+$/)[1], 10);
    }
  } else if (typeof window.ActiveXObject != "undefined") {
    try {
      var testObject = new ActiveXObject("ShockwaveFlash.ShockwaveFlash");
      if (testObject) {
        version = parseInt(testObject.GetVariable("$version").match(/^[^\s]+\s(\d+)/)[1], 10);
      }
    }
    catch(e) {}
  }
  VideoJS.flashVersion = version;
  return VideoJS.flashVersion;
};

// Browser & Device Checks
VideoJS.isIE = function(){ return !+"\v1"; };
VideoJS.isIpad = function(){ return navigator.userAgent.match(/iPad/i) !== null; };
VideoJS.isIphone = function(){ return navigator.userAgent.match(/iPhone/i) !== null; };
VideoJS.isAndroid = function(){ return navigator.userAgent.match(/Android/i) !== null; };

// Allows for binding context to functions
// when using in event listeners and timeouts
Function.prototype.context = function(obj) {
  var method = this, temp;
  temp = function() {
    return method.apply(obj, arguments);
  };
  return temp;
};

// jQuery Plugin
if (window.jQuery) {
  (function($) {
    $.fn.VideoJS = function(options) {
      this.each(function() {
        VideoJS.setup(this, options);
      });
      return this;
     };
   })(jQuery);
}