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wp-embed.js
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/** * WordPress inline HTML embed * * @since 4.4.0 * @output site-inc/js/wp-embed.js * * This file cannot have ampersands in it. This is to ensure * it can be embedded in older versions of WordPress. * See https://core.trac.wordpress.org/changeset/35708. */ (function ( window, document ) { 'use strict'; var supportedBrowser = false, loaded = false; if ( document.querySelector ) { if ( window.addEventListener ) { supportedBrowser = true; } } /** @namespace wp */ window.wp = window.wp || {}; if ( !! window.wp.receiveEmbedMessage ) { return; } window.wp.receiveEmbedMessage = function( e ) { var data = e.data; if ( ! data ) { return; } if ( ! ( data.secret || data.message || data.value ) ) { return; } if ( /[^a-zA-Z0-9]/.test( data.secret ) ) { return; } var iframes = document.querySelectorAll( 'iframe[data-secret="' + data.secret + '"]' ), blockquotes = document.querySelectorAll( 'blockquote[data-secret="' + data.secret + '"]' ), i, source, height, sourceURL, targetURL; for ( i = 0; i < blockquotes.length; i++ ) { blockquotes[ i ].style.display = 'none'; } for ( i = 0; i < iframes.length; i++ ) { source = iframes[ i ]; if ( e.source !== source.contentWindow ) { continue; } source.removeAttribute( 'style' ); /* Resize the iframe on request. */ if ( 'height' === data.message ) { height = parseInt( data.value, 10 ); if ( height > 1000 ) { height = 1000; } else if ( ~~height < 200 ) { height = 200; } source.height = height; } /* Link to a specific URL on request. */ if ( 'link' === data.message ) { sourceURL = document.createElement( 'a' ); targetURL = document.createElement( 'a' ); sourceURL.href = source.getAttribute( 'src' ); targetURL.href = data.value; /* Only continue if link hostname matches iframe's hostname. */ if ( targetURL.host === sourceURL.host ) { if ( document.activeElement === source ) { window.top.location.href = data.value; } } } } }; function onLoad() { if ( loaded ) { return; } loaded = true; var isIE10 = -1 !== navigator.appVersion.indexOf( 'MSIE 10' ), isIE11 = !!navigator.userAgent.match( /Trident.*rv:11\./ ), iframes = document.querySelectorAll( 'iframe.wp-embedded-content' ), iframeClone, i, source, secret; for ( i = 0; i < iframes.length; i++ ) { source = iframes[ i ]; if ( ! source.getAttribute( 'data-secret' ) ) { /* Add secret to iframe */ secret = Math.random().toString( 36 ).substr( 2, 10 ); source.src += '#?secret=' + secret; source.setAttribute( 'data-secret', secret ); } /* Remove security attribute from iframes in IE10 and IE11. */ if ( ( isIE10 || isIE11 ) ) { iframeClone = source.cloneNode( true ); iframeClone.removeAttribute( 'security' ); source.parentNode.replaceChild( iframeClone, source ); } } } if ( supportedBrowser ) { window.addEventListener( 'message', window.wp.receiveEmbedMessage, false ); document.addEventListener( 'DOMContentLoaded', onLoad, false ); window.addEventListener( 'load', onLoad, false ); } })( window, document );