Themes: Improve a11y and extendability of custom video headers.
This adds play/pause controls to video headers, along with voice assistance, using `wp.a11y.speak`, to make custom video headers more accessible. To make styling the play/pause button easier for themes, CSS has been omitted from the default implementation. This also includes a refactor of the `wp.customHeader` code to introduce a `BaseHandler` class, which can be extended by plugins and themes to modify or enhance the default video handlers. Props davidakennedy, afercia, bradyvercher, joemcgill, adamsilverstein, rianrietveld. Fixes #38678. Built from https://develop.svn.wordpress.org/trunk@39272 git-svn-id: http://core.svn.wordpress.org/trunk@39212 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Joe McGill
parent
c2bc6df69a
commit
5ef714db18
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@ -3596,7 +3596,7 @@ final class WP_Customize_Manager {
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$this->add_setting( 'external_header_video', array(
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'theme_supports' => array( 'custom-header', 'video' ),
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'transport' => 'postMessage',
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'sanitize_callback' => 'esc_url',
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'sanitize_callback' => 'esc_url_raw',
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'validate_callback' => array( $this, '_validate_external_header_video' ),
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) );
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@ -1,112 +1,390 @@
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/* global YT */
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( function( window, settings ) {
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if ( ! ( 'addEventListener' in window ) ) {
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var NativeHandler, YouTubeHandler;
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window.wp = window.wp || {};
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// Fail gracefully in unsupported browsers.
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if ( ! ( 'addEventListener' in window ) ) {
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return;
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}
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function wpCustomHeader() {
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var handlers = {
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nativeVideo: {
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test: function( settings ) {
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var video = document.createElement( 'video' );
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return video.canPlayType( settings.mimeType );
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},
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callback: nativeHandler
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},
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youtube: {
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test: function( settings ) {
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return 'video/x-youtube' === settings.mimeType;
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},
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callback: youtubeHandler
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/**
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* Trigger an event.
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*
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* @param {Element} target HTML element to dispatch the event on.
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* @param {string} name Event name.
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*/
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function trigger( target, name ) {
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var evt;
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if ( 'function' === typeof window.Event ) {
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evt = new Event( name );
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} else {
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evt = document.createEvent( 'Event' );
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evt.initEvent( name, true, true );
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}
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target.dispatchEvent( evt );
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}
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/**
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* Create a custom header instance.
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*
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* @class CustomHeader
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*/
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function CustomHeader() {
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this.handlers = {
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nativeVideo: new NativeHandler(),
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youtube: new YouTubeHandler()
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};
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function initialize() {
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settings.container = document.getElementById( 'wp-custom-header' );
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if ( supportsVideo() ) {
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for ( var id in handlers ) {
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var handler = handlers[ id ];
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if ( handlers.hasOwnProperty( id ) && handler.test( settings ) ) {
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handler.callback( settings );
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// Set up and dispatch custom event when the video is loaded.
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if ( 'dispatchEvent' in window ) {
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var videoLoaded = new Event( 'wp-custom-header-video-loaded' );
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document.dispatchEvent( videoLoaded );
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}
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CustomHeader.prototype = {
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/**
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* Initalize the custom header.
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*
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* If the environment supports video, loops through registered handlers
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* until one is found that can handle the video.
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*/
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initialize: function() {
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if ( this.supportsVideo() ) {
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for ( var id in this.handlers ) {
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var handler = this.handlers[ id ];
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if ( 'test' in handler && handler.test( settings ) ) {
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this.activeHandler = handler.initialize.call( handler, settings );
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// Dispatch custom event when the video is loaded.
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trigger( document, 'wp-custom-header-video-loaded' );
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break;
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}
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}
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}
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}
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},
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function supportsVideo() {
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/**
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* Determines if the current environment supports video.
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*
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* Themes and plugins can override this method to change the criteria.
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*
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* @return {boolean}
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*/
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supportsVideo: function() {
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// Don't load video on small screens. @todo: consider bandwidth and other factors.
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if ( window.innerWidth < settings.minWidth || window.innerHeight < settings.minHeight ) {
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return false;
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}
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return true;
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}
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},
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return {
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handlers: handlers,
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initialize: initialize,
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supportsVideo: supportsVideo
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/**
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* Base handler for custom handlers to extend.
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*
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* @type {BaseHandler}
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*/
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BaseVideoHandler: BaseHandler
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};
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/**
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* Create a video handler instance.
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*
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* @class BaseHandler
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*/
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function BaseHandler() {}
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BaseHandler.prototype = {
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/**
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* Initialize the video handler.
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*
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* @param {object} settings Video settings.
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*/
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initialize: function( settings ) {
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var handler = this,
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button = document.createElement( 'button' );
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this.settings = settings;
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this.container = document.getElementById( 'wp-custom-header' ),
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this.button = button;
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button.setAttribute( 'type', 'button' );
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button.setAttribute( 'id', 'wp-custom-header-video-button' );
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button.setAttribute( 'class', 'wp-custom-header-video-button wp-custom-header-video-play' );
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button.innerHTML = settings.l10n.play;
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// Toggle video playback when the button is clicked.
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button.addEventListener( 'click', function() {
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if ( handler.isPaused() ) {
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handler.play();
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} else {
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handler.pause();
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}
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});
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// Update the button class and text when the video state changes.
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this.container.addEventListener( 'play', function() {
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button.className = 'wp-custom-header-video-button wp-custom-header-video-play';
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button.innerHTML = settings.l10n.pause;
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if ( 'a11y' in window.wp ) {
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window.wp.a11y.speak( settings.l10n.playSpeak);
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}
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});
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this.container.addEventListener( 'pause', function() {
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button.className = 'wp-custom-header-video-button wp-custom-header-video-pause';
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button.innerHTML = settings.l10n.play;
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if ( 'a11y' in window.wp ) {
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window.wp.a11y.speak( settings.l10n.pauseSpeak);
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}
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});
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this.ready();
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},
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/**
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* Ready method called after a handler is initialized.
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*
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* @abstract
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*/
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ready: function() {},
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/**
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* Whether the video is paused.
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*
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* @abstract
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* @return {boolean}
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*/
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isPaused: function() {},
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/**
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* Pause the video.
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*
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* @abstract
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*/
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pause: function() {},
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/**
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* Play the video.
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*
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* @abstract
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*/
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play: function() {},
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/**
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* Append a video node to the header container.
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*
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* @param {Element} node HTML element.
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*/
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setVideo: function( node ) {
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var editShortcutNode,
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editShortcut = this.container.getElementsByClassName( 'customize-partial-edit-shortcut' );
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if ( editShortcut.length ) {
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editShortcutNode = this.container.removeChild( editShortcut[0] );
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}
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function nativeHandler( settings ) {
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this.container.innerHTML = '';
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this.container.appendChild( node );
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if ( editShortcutNode ) {
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this.container.appendChild( editShortcutNode );
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}
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},
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/**
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* Show the video controls.
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*
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* Appends a play/pause button to header container.
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*/
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showControls: function() {
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if ( ! this.container.contains( this.button ) ) {
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this.container.appendChild( this.button );
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}
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},
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/**
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* Whether the handler can process a video.
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*
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* @abstract
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* @param {object} settings Video settings.
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* @return {boolean}
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*/
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test: function() {
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return false;
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},
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/**
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* Trigger an event on the header container.
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*
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* @param {string} name Event name.
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*/
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trigger: function( name ) {
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trigger( this.container, name );
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}
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};
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/**
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* Create a custom handler.
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*
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* @param {object} protoProps Properties to apply to the prototype.
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* @return CustomHandler The subclass.
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*/
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BaseHandler.extend = function( protoProps ) {
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var prop;
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function CustomHandler() {
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var result = BaseHandler.apply( this, arguments );
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return result;
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}
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CustomHandler.prototype = Object.create( BaseHandler.prototype );
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CustomHandler.prototype.constructor = CustomHandler;
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for ( prop in protoProps ) {
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CustomHandler.prototype[ prop ] = protoProps[ prop ];
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}
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return CustomHandler;
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};
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/**
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* Native video handler.
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*
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* @class NativeHandler
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*/
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NativeHandler = BaseHandler.extend({
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/**
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* Whether the native handler supports a video.
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*
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* @param {object} settings Video settings.
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* @return {boolean}
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*/
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test: function( settings ) {
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var video = document.createElement( 'video' );
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return video.canPlayType( settings.mimeType );
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},
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/**
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* Set up a native video element.
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*/
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ready: function() {
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var handler = this,
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video = document.createElement( 'video' );
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video.id = 'wp-custom-header-video';
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video.autoplay = 'autoplay';
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video.loop = 'loop';
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video.muted = 'muted';
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video.width = settings.width;
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video.height = settings.height;
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video.width = this.settings.width;
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video.height = this.settings.height;
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video.addEventListener( 'click', function() {
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if ( video.paused ) {
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video.play();
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} else {
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video.pause();
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video.addEventListener( 'play', function() {
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handler.trigger( 'play' );
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});
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video.addEventListener( 'pause', function() {
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handler.trigger( 'pause' );
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});
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video.addEventListener( 'canplay', function() {
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handler.showControls();
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});
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this.video = video;
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handler.setVideo( video );
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video.src = this.settings.videoUrl;
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},
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/**
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* Whether the video is paused.
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*
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* @return {boolean}
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*/
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isPaused: function() {
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return this.video.paused;
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},
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/**
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* Pause the video.
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*/
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pause: function() {
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this.video.pause();
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},
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/**
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* Play the video.
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*/
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play: function() {
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this.video.play();
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}
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});
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settings.container.innerHTML = '';
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settings.container.appendChild( video );
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video.src = settings.videoUrl;
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/**
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* YouTube video handler.
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*
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* @class YouTubeHandler
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*/
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YouTubeHandler = BaseHandler.extend({
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/**
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* Whether the handler supports a video.
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*
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* @param {object} settings Video settings.
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* @return {boolean}
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*/
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test: function( settings ) {
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return 'video/x-youtube' === settings.mimeType;
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},
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/**
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* Set up a YouTube iframe.
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*
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* Loads the YouTube IFrame API if the 'YT' global doesn't exist.
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*/
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ready: function() {
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var handler = this;
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if ( 'YT' in window ) {
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YT.ready( handler.loadVideo.bind( handler ) );
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} else {
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var tag = document.createElement( 'script' );
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tag.src = 'https://www.youtube.com/iframe_api';
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tag.onload = function () {
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YT.ready( handler.loadVideo.bind( handler ) );
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};
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document.getElementsByTagName( 'head' )[0].appendChild( tag );
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}
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},
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function youtubeHandler( settings ) {
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/**
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* Load a YouTube video.
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*/
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loadVideo: function() {
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var handler = this,
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video = document.createElement( 'div' ),
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// @link http://stackoverflow.com/a/27728417
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var VIDEO_ID_REGEX = /^.*(?:(?:youtu\.be\/|v\/|vi\/|u\/\w\/|embed\/)|(?:(?:watch)?\?v(?:i)?=|\&v(?:i)?=))([^#\&\?]*).*/,
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videoId = settings.videoUrl.match( VIDEO_ID_REGEX )[1];
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VIDEO_ID_REGEX = /^.*(?:(?:youtu\.be\/|v\/|vi\/|u\/\w\/|embed\/)|(?:(?:watch)?\?v(?:i)?=|\&v(?:i)?=))([^#\&\?]*).*/;
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function loadVideo() {
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var YT = window.YT || {};
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YT.ready(function() {
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var video = document.createElement( 'div' );
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video.id = 'wp-custom-header-video';
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settings.container.innerHTML = '';
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settings.container.appendChild( video );
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handler.setVideo( video );
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new YT.Player( video, {
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height: settings.height,
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width: settings.width,
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videoId: videoId,
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handler.player = new YT.Player( video, {
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height: this.settings.height,
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width: this.settings.width,
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videoId: this.settings.videoUrl.match( VIDEO_ID_REGEX )[1],
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events: {
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onReady: function( e ) {
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e.target.mute();
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handler.showControls();
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},
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onStateChange: function( e ) {
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if ( YT.PlayerState.ENDED === e.data ) {
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if ( YT.PlayerState.PLAYING === e.data ) {
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handler.trigger( 'play' );
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} else if ( YT.PlayerState.PAUSED === e.data ) {
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handler.trigger( 'pause' );
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} else if ( YT.PlayerState.ENDED === e.data ) {
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e.target.playVideo();
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}
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}
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@ -119,37 +397,50 @@
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iv_load_policy: 3,
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loop: 1,
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modestbranding: 1,
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//origin: '',
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playsinline: 1,
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rel: 0,
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showinfo: 0
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}
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});
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},
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/**
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* Whether the video is paused.
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*
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* @return {boolean}
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*/
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isPaused: function() {
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return YT.PlayerState.PAUSED === this.player.getPlayerState();
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},
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/**
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* Pause the video.
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*/
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pause: function() {
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this.player.pauseVideo();
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},
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/**
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* Play the video.
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*/
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play: function() {
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this.player.playVideo();
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}
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});
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}
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if ( 'YT' in window ) {
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loadVideo();
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} else {
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var tag = document.createElement( 'script' );
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tag.src = 'https://www.youtube.com/player_api';
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tag.onload = function () { loadVideo(); };
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document.getElementsByTagName( 'head' )[0].appendChild( tag );
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}
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}
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window.wp = window.wp || {};
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window.wp.customHeader = new wpCustomHeader();
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document.addEventListener( 'DOMContentLoaded', window.wp.customHeader.initialize, false );
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// Initialize the custom header when the DOM is ready.
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window.wp.customHeader = new CustomHeader();
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document.addEventListener( 'DOMContentLoaded', window.wp.customHeader.initialize.bind( window.wp.customHeader ), false );
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// Selective refresh support in the Customizer.
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if ( 'customize' in window.wp ) {
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wp.customize.selectiveRefresh.bind( 'render-partials-response', function( response ) {
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window.wp.customize.selectiveRefresh.bind( 'render-partials-response', function( response ) {
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if ( 'custom_header_settings' in response ) {
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settings = response.custom_header_settings;
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}
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});
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wp.customize.selectiveRefresh.bind( 'partial-content-rendered', function( placement ) {
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window.wp.customize.selectiveRefresh.bind( 'partial-content-rendered', function( placement ) {
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if ( 'custom_header' === placement.partial.id ) {
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window.wp.customHeader.initialize();
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}
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@ -1 +1 @@
|
|||
!function(a,b){function c(){function c(){if(b.container=document.getElementById("wp-custom-header"),f())for(var c in g){var d=g[c];if(g.hasOwnProperty(c)&&d.test(b)){if(d.callback(b),"dispatchEvent"in a){var e=new Event("wp-custom-header-video-loaded");document.dispatchEvent(e)}break}}}function f(){return!(a.innerWidth<b.minWidth||a.innerHeight<b.minHeight)}var g={nativeVideo:{test:function(a){var b=document.createElement("video");return b.canPlayType(a.mimeType)},callback:d},youtube:{test:function(a){return"video/x-youtube"===a.mimeType},callback:e}};return{handlers:g,initialize:c,supportsVideo:f}}function d(a){var b=document.createElement("video");b.id="wp-custom-header-video",b.autoplay="autoplay",b.loop="loop",b.muted="muted",b.width=a.width,b.height=a.height,b.addEventListener("click",function(){b.paused?b.play():b.pause()}),a.container.innerHTML="",a.container.appendChild(b),b.src=a.videoUrl}function e(b){function c(){var c=a.YT||{};c.ready(function(){var a=document.createElement("div");a.id="wp-custom-header-video",b.container.innerHTML="",b.container.appendChild(a),new c.Player(a,{height:b.height,width:b.width,videoId:e,events:{onReady:function(a){a.target.mute()},onStateChange:function(a){c.PlayerState.ENDED===a.data&&a.target.playVideo()}},playerVars:{autoplay:1,controls:0,disablekb:1,fs:0,iv_load_policy:3,loop:1,modestbranding:1,playsinline:1,rel:0,showinfo:0}})})}var d=/^.*(?:(?:youtu\.be\/|v\/|vi\/|u\/\w\/|embed\/)|(?:(?:watch)?\?v(?:i)?=|\&v(?:i)?=))([^#\&\?]*).*/,e=b.videoUrl.match(d)[1];if("YT"in a)c();else{var f=document.createElement("script");f.src="https://www.youtube.com/player_api",f.onload=function(){c()},document.getElementsByTagName("head")[0].appendChild(f)}}"addEventListener"in a&&(a.wp=a.wp||{},a.wp.customHeader=new c,document.addEventListener("DOMContentLoaded",a.wp.customHeader.initialize,!1),"customize"in a.wp&&(wp.customize.selectiveRefresh.bind("render-partials-response",function(a){"custom_header_settings"in a&&(b=a.custom_header_settings)}),wp.customize.selectiveRefresh.bind("partial-content-rendered",function(b){"custom_header"===b.partial.id&&a.wp.customHeader.initialize()})))}(window,window._wpCustomHeaderSettings||{});
|
||||
!function(a,b){function c(b,c){var d;"function"==typeof a.Event?d=new Event(c):(d=document.createEvent("Event"),d.initEvent(c,!0,!0)),b.dispatchEvent(d)}function d(){this.handlers={nativeVideo:new f,youtube:new g}}function e(){}var f,g;a.wp=a.wp||{},"addEventListener"in a&&(d.prototype={initialize:function(){if(this.supportsVideo())for(var a in this.handlers){var d=this.handlers[a];if("test"in d&&d.test(b)){this.activeHandler=d.initialize.call(d,b),c(document,"wp-custom-header-video-loaded");break}}},supportsVideo:function(){return!(a.innerWidth<b.minWidth||a.innerHeight<b.minHeight)},BaseVideoHandler:e},e.prototype={initialize:function(b){var c=this,d=document.createElement("button");this.settings=b,this.container=document.getElementById("wp-custom-header"),this.button=d,d.setAttribute("type","button"),d.setAttribute("id","wp-custom-header-video-button"),d.setAttribute("class","wp-custom-header-video-button wp-custom-header-video-play"),d.innerHTML=b.l10n.play,d.addEventListener("click",function(){c.isPaused()?c.play():c.pause()}),this.container.addEventListener("play",function(){d.className="wp-custom-header-video-button wp-custom-header-video-play",d.innerHTML=b.l10n.pause,"a11y"in a.wp&&a.wp.a11y.speak(b.l10n.playSpeak)}),this.container.addEventListener("pause",function(){d.className="wp-custom-header-video-button wp-custom-header-video-pause",d.innerHTML=b.l10n.play,"a11y"in a.wp&&a.wp.a11y.speak(b.l10n.pauseSpeak)}),this.ready()},ready:function(){},isPaused:function(){},pause:function(){},play:function(){},setVideo:function(a){var b,c=this.container.getElementsByClassName("customize-partial-edit-shortcut");c.length&&(b=this.container.removeChild(c[0])),this.container.innerHTML="",this.container.appendChild(a),b&&this.container.appendChild(b)},showControls:function(){this.container.contains(this.button)||this.container.appendChild(this.button)},test:function(){return!1},trigger:function(a){c(this.container,a)}},e.extend=function(a){function b(){var a=e.apply(this,arguments);return a}var c;b.prototype=Object.create(e.prototype),b.prototype.constructor=b;for(c in a)b.prototype[c]=a[c];return b},f=e.extend({test:function(a){var b=document.createElement("video");return b.canPlayType(a.mimeType)},ready:function(){var a=this,b=document.createElement("video");b.id="wp-custom-header-video",b.autoplay="autoplay",b.loop="loop",b.muted="muted",b.width=this.settings.width,b.height=this.settings.height,b.addEventListener("play",function(){a.trigger("play")}),b.addEventListener("pause",function(){a.trigger("pause")}),b.addEventListener("canplay",function(){a.showControls()}),this.video=b,a.setVideo(b),b.src=this.settings.videoUrl},isPaused:function(){return this.video.paused},pause:function(){this.video.pause()},play:function(){this.video.play()}}),g=e.extend({test:function(a){return"video/x-youtube"===a.mimeType},ready:function(){var b=this;if("YT"in a)YT.ready(b.loadVideo.bind(b));else{var c=document.createElement("script");c.src="https://www.youtube.com/iframe_api",c.onload=function(){YT.ready(b.loadVideo.bind(b))},document.getElementsByTagName("head")[0].appendChild(c)}},loadVideo:function(){var a=this,b=document.createElement("div"),c=/^.*(?:(?:youtu\.be\/|v\/|vi\/|u\/\w\/|embed\/)|(?:(?:watch)?\?v(?:i)?=|\&v(?:i)?=))([^#\&\?]*).*/;b.id="wp-custom-header-video",a.setVideo(b),a.player=new YT.Player(b,{height:this.settings.height,width:this.settings.width,videoId:this.settings.videoUrl.match(c)[1],events:{onReady:function(b){b.target.mute(),a.showControls()},onStateChange:function(b){YT.PlayerState.PLAYING===b.data?a.trigger("play"):YT.PlayerState.PAUSED===b.data?a.trigger("pause"):YT.PlayerState.ENDED===b.data&&b.target.playVideo()}},playerVars:{autoplay:1,controls:0,disablekb:1,fs:0,iv_load_policy:3,loop:1,modestbranding:1,playsinline:1,rel:0,showinfo:0}})},isPaused:function(){return YT.PlayerState.PAUSED===this.player.getPlayerState()},pause:function(){this.player.pauseVideo()},play:function(){this.player.playVideo()}}),a.wp.customHeader=new d,document.addEventListener("DOMContentLoaded",a.wp.customHeader.initialize.bind(a.wp.customHeader),!1),"customize"in a.wp&&(a.wp.customize.selectiveRefresh.bind("render-partials-response",function(a){"custom_header_settings"in a&&(b=a.custom_header_settings)}),a.wp.customize.selectiveRefresh.bind("partial-content-rendered",function(b){"custom_header"===b.partial.id&&a.wp.customHeader.initialize()})))}(window,window._wpCustomHeaderSettings||{});
|
||||
|
|
@ -481,7 +481,7 @@ function wp_default_scripts( &$scripts ) {
|
|||
$scripts->add( 'customize-nav-menus', "/wp-admin/js/customize-nav-menus$suffix.js", array( 'jquery', 'wp-backbone', 'customize-controls', 'accordion', 'nav-menu' ), false, 1 );
|
||||
$scripts->add( 'customize-preview-nav-menus', "/wp-includes/js/customize-preview-nav-menus$suffix.js", array( 'jquery', 'wp-util', 'customize-preview', 'customize-selective-refresh' ), false, 1 );
|
||||
|
||||
$scripts->add( 'wp-custom-header', "/wp-includes/js/wp-custom-header$suffix.js", array(), false, 1 );
|
||||
$scripts->add( 'wp-custom-header', "/wp-includes/js/wp-custom-header$suffix.js", array( 'wp-a11y' ), false, 1 );
|
||||
|
||||
$scripts->add( 'accordion', "/wp-admin/js/accordion$suffix.js", array( 'jquery' ), false, 1 );
|
||||
|
||||
|
|
|
|||
|
|
@ -1381,6 +1381,12 @@ function get_header_video_settings() {
|
|||
'height' => absint( $header->height ),
|
||||
'minWidth' => 900,
|
||||
'minHeight' => 500,
|
||||
'l10n' => array(
|
||||
'pause' => __( 'Pause' ),
|
||||
'play' => __( 'Play' ),
|
||||
'pauseSpeak' => __( 'Video is paused.'),
|
||||
'playSpeak' => __( 'Video is playing.'),
|
||||
),
|
||||
);
|
||||
|
||||
if ( preg_match( '#^https?://(?:www\.)?(?:youtube\.com/watch|youtu\.be/)#', $video_url ) ) {
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
*
|
||||
* @global string $wp_version
|
||||
*/
|
||||
$wp_version = '4.7-beta4-39271';
|
||||
$wp_version = '4.7-beta4-39272';
|
||||
|
||||
/**
|
||||
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
|
||||
|
|
|
|||
Loading…
Reference in New Issue