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+/**
+ * Video.js Resolution Selector
+ *
+ * This plugin for Video.js adds a resolution selector option
+ * to the toolbar. Usage:
+ *
+ * <video>
+ * <source data-res="480" src="..." />
+ * <source data-res="240" src="..." />
+ * </video>
+ */
+
+(function( _V_ ) {
+
+ /***********************************************************************************
+ * Define some helper functions
+ ***********************************************************************************/
+ var methods = {
+
+ /**
+ * In a future version, this can be made more intelligent,
+ * but for now, we'll just add a "p" at the end if we are passed
+ * numbers.
+ *
+ * @param (string) res The resolution to make a label for
+ *
+ * @returns (string) The label text string
+ */
+ res_label : function( res ) {
+
+ return ( /^\d+$/.test( res ) ) ? res + 'p' : res;
+ }
+ };
+
+ /***********************************************************************************
+ * Setup our resolution menu items
+ ***********************************************************************************/
+ _V_.ResolutionMenuItem = _V_.MenuItem.extend({
+
+ // Call variable to prevent the resolution change from being called twice
+ call_count : 0,
+
+ /** @constructor */
+ init : function( player, options ){
+
+ var touchstart = false;
+
+ // Modify options for parent MenuItem class's init.
+ options.label = methods.res_label( options.res );
+ options.selected = ( options.res.toString() === player.getCurrentRes().toString() );
+
+ // Call the parent constructor
+ _V_.MenuItem.call( this, player, options );
+
+ // Store the resolution as a property
+ this.resolution = options.res;
+
+ // Register our click and tap handlers
+ this.on( ['click', 'tap'], this.onClick );
+
+ // Toggle the selected class whenever the resolution changes
+ player.on( 'changeRes', _V_.bind( this, function() {
+
+ if ( this.resolution == player.getCurrentRes() ) {
+
+ this.selected( true );
+
+ } else {
+
+ this.selected( false );
+ }
+
+ // Reset the call count
+ this.call_count = 0;
+ }));
+ }
+ });
+
+ // Handle clicks on the menu items
+ _V_.ResolutionMenuItem.prototype.onClick = function() {
+
+ // Check if this has already been called
+ if ( this.call_count > 0 ) { return; }
+
+ // Call the player.changeRes method
+ this.player().changeRes( this.resolution );
+
+ // Increment the call counter
+ this.call_count++;
+ };
+
+ /***********************************************************************************
+ * Setup our resolution menu title item
+ ***********************************************************************************/
+ _V_.ResolutionTitleMenuItem = _V_.MenuItem.extend({
+
+ init : function( player, options ) {
+
+ // Call the parent constructor
+ _V_.MenuItem.call( this, player, options );
+
+ // No click handler for the menu title
+ this.off( 'click' );
+ }
+ });
+
+ /***********************************************************************************
+ * Define our resolution selector button
+ ***********************************************************************************/
+ _V_.ResolutionSelector = _V_.MenuButton.extend({
+
+ /** @constructor */
+ init : function( player, options ) {
+
+ // Add our list of available resolutions to the player object
+ player.availableRes = options.available_res;
+
+ // Call the parent constructor
+ _V_.MenuButton.call( this, player, options );
+
+ // Set the button text based on the option provided
+ this.el().firstChild.firstChild.innerHTML = options.buttonText;
+ }
+ });
+
+ // Set class for resolution selector button
+ _V_.ResolutionSelector.prototype.className = 'vjs-res-button';
+
+ // Create a menu item for each available resolution
+ _V_.ResolutionSelector.prototype.createItems = function() {
+
+ var player = this.player(),
+ items = [],
+ current_res;
+
+ // Add the menu title item
+ items.push( new _V_.ResolutionTitleMenuItem( player, {
+
+ el : _V_.Component.prototype.createEl( 'li', {
+
+ className : 'vjs-menu-title vjs-res-menu-title',
+ innerHTML : player.localize( 'Quality' )
+ })
+ }));
+
+ // Add an item for each available resolution
+ for ( current_res in player.availableRes ) {
+
+ // Don't add an item for the length attribute
+ if ( 'length' == current_res ) { continue; }
+
+ items.push( new _V_.ResolutionMenuItem( player, {
+ res : current_res
+ }));
+ }
+
+ // Sort the available resolutions in descending order
+ items.sort(function( a, b ) {
+
+ if ( typeof a.resolution == 'undefined' ) {
+
+ return -1;
+
+ } else {
+
+ return parseInt( b.resolution ) - parseInt( a.resolution );
+ }
+ });
+
+ return items;
+ };
+
+ /***********************************************************************************
+ * Register the plugin with videojs, main plugin function
+ ***********************************************************************************/
+ _V_.plugin( 'resolutionSelector', function( options ) {
+
+ // Only enable the plugin on HTML5 videos
+ //if ( ! this.el().firstChild.canPlayType ) { return; }
+
+ /*******************************************************************
+ * Setup variables, parse settings
+ *******************************************************************/
+ var player = this,
+ sources = player.options().sources,
+ i = sources.length,
+ j,
+ found_type,
+
+ // Override default options with those provided
+ settings = _V_.util.mergeOptions({
+
+ default_res : '', // (string) The resolution that should be selected by default ( '480' or '480,1080,240' )
+ force_types : false // (array) List of media types. If passed, we need to have source for each type in each resolution or that resolution will not be an option
+
+ }, options || {} ),
+
+ available_res = { length : 0 },
+ current_res,
+ resolutionSelector,
+
+ // Split default resolutions if set and valid, otherwise default to an empty array
+ default_resolutions = ( settings.default_res && typeof settings.default_res == 'string' ) ? settings.default_res.split( ',' ) : [];
+
+ // Get all of the available resoloutions
+ while ( i > 0 ) {
+
+ i--;
+
+ // Skip sources that don't have data-res attributes
+ if ( ! sources[i]['data-res'] ) { continue; }
+
+ current_res = sources[i]['data-res'];
+
+ if ( typeof available_res[current_res] !== 'object' ) {
+
+ available_res[current_res] = [];
+ available_res.length++;
+ }
+
+ available_res[current_res].push( sources[i] );
+ }
+
+ // Check for forced types
+ if ( settings.force_types ) {
+
+ // Loop through all available resoultions
+ for ( current_res in available_res ) {
+
+ // Don't count the length property as a resolution
+ if ( 'length' == current_res ) { continue; }
+
+ i = settings.force_types.length;
+ found_types = 0;
+
+ // Loop through all required types
+ while ( i > 0 ) {
+
+ i--;
+
+ j = available_res[current_res].length;
+
+ // Loop through all available sources in current resolution
+ while ( j > 0 ) {
+
+ j--;
+
+ // Check if the current source matches the current type we're checking
+ if ( settings.force_types[i] === available_res[current_res][j].type ) {
+
+ found_types++;
+ break;
+ }
+ }
+ }
+
+ // If we didn't find sources for all of the required types in the current res, remove it
+ if ( found_types < settings.force_types.length ) {
+
+ delete available_res[current_res];
+ available_res.length--;
+ }
+ }
+ }
+
+ // Make sure we have at least 2 available resolutions before we add the button
+ if ( available_res.length < 2 ) { return; }
+
+ // Loop through the choosen default resolutions if there were any
+ for ( i = 0; i < default_resolutions.length; i++ ) {
+
+ // Set the video to start out with the first available default res
+ if ( available_res[default_resolutions[i]] ) {
+
+ player.src( available_res[default_resolutions[i]] );
+ player.currentRes = default_resolutions[i];
+ break;
+ }
+ }
+
+ /*******************************************************************
+ * Add methods to player object
+ *******************************************************************/
+
+ // Make sure we have player.localize() if it's not defined by Video.js
+ if ( typeof player.localize !== 'function' ) {
+
+ player.localize = function( string ) {
+
+ return string;
+ };
+ }
+
+ // Helper function to get the current resolution
+ player.getCurrentRes = function() {
+
+ if ( typeof player.currentRes !== 'undefined' ) {
+
+ return player.currentRes;
+
+ } else {
+
+ try {
+
+ return res = player.options().sources[0]['data-res'];
+
+ } catch(e) {
+
+ return '';
+ }
+ }
+ };
+
+ // Define the change res method
+ player.changeRes = function( target_resolution ) {
+
+ var video_el = player.el().firstChild,
+ is_paused = player.paused(),
+ current_time = player.currentTime(),
+ button_nodes,
+ button_node_count;
+
+ // Do nothing if we aren't changing resolutions or if the resolution isn't defined
+ if ( player.getCurrentRes() == target_resolution
+ || ! player.availableRes
+ || ! player.availableRes[target_resolution] ) { return; }
+
+ // Make sure the loadedmetadata event will fire
+ if ( 'none' == video_el.preload ) { video_el.preload = 'metadata'; }
+
+ // Change the source and make sure we don't start the video over
+ player.src( player.availableRes[target_resolution] ).one( 'loadedmetadata', function() {
+
+ player.currentTime( current_time );
+
+ // If the video was paused, don't show the poster image again
+ player.addClass( 'vjs-has-started' );
+
+ if ( ! is_paused ) { player.play(); }
+ });
+
+ // Save the newly selected resolution in our player options property
+ player.currentRes = target_resolution;
+
+ // Make sure the button has been added to the control bar
+ if ( player.controlBar.resolutionSelector ) {
+
+ button_nodes = player.controlBar.resolutionSelector.el().firstChild.children;
+ button_node_count = button_nodes.length;
+
+ // Update the button text
+ while ( button_node_count > 0 ) {
+
+ button_node_count--;
+
+ if ( 'vjs-control-text' == button_nodes[button_node_count].className ) {
+
+ button_nodes[button_node_count].innerHTML = methods.res_label( target_resolution );
+ break;
+ }
+ }
+ }
+
+ // Update the classes to reflect the currently selected resolution
+ player.trigger( 'changeRes' );
+ };
+
+ /*******************************************************************
+ * Add the resolution selector button
+ *******************************************************************/
+
+ // Get the starting resolution
+ current_res = player.getCurrentRes();
+
+ if ( current_res ) { current_res = methods.res_label( current_res ); }
+
+ // Add the resolution selector button
+ resolutionSelector = new _V_.ResolutionSelector( player, {
+ buttonText : player.localize( current_res || 'Quality' ),
+ available_res : available_res
+ });
+
+ // Add the button to the control bar object and the DOM
+ player.controlBar.resolutionSelector = player.controlBar.addChild( resolutionSelector );
+ });
+
+})( videojs );