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wp-embed.js (3214B)

      1 /**
      2  * WordPress inline HTML embed
      3  *
      4  * @since 4.4.0
      5  * @output wp-includes/js/wp-embed.js
      6  *
      7  * This file cannot have ampersands in it. This is to ensure
      8  * it can be embedded in older versions of WordPress.
      9  * See https://core.trac.wordpress.org/changeset/35708.
     10  */
     11 (function ( window, document ) {
     12 	'use strict';
     13 
     14 	var supportedBrowser = false,
     15 		loaded = false;
     16 
     17 		if ( document.querySelector ) {
     18 			if ( window.addEventListener ) {
     19 				supportedBrowser = true;
     20 			}
     21 		}
     22 
     23 	/** @namespace wp */
     24 	window.wp = window.wp || {};
     25 
     26 	if ( !! window.wp.receiveEmbedMessage ) {
     27 		return;
     28 	}
     29 
     30 	window.wp.receiveEmbedMessage = function( e ) {
     31 		var data = e.data;
     32 
     33 		if ( ! data ) {
     34 			return;
     35 		}
     36 
     37 		if ( ! ( data.secret || data.message || data.value ) ) {
     38 			return;
     39 		}
     40 
     41 		if ( /[^a-zA-Z0-9]/.test( data.secret ) ) {
     42 			return;
     43 		}
     44 
     45 		var iframes = document.querySelectorAll( 'iframe[data-secret="' + data.secret + '"]' ),
     46 			blockquotes = document.querySelectorAll( 'blockquote[data-secret="' + data.secret + '"]' ),
     47 			i, source, height, sourceURL, targetURL;
     48 
     49 		for ( i = 0; i < blockquotes.length; i++ ) {
     50 			blockquotes[ i ].style.display = 'none';
     51 		}
     52 
     53 		for ( i = 0; i < iframes.length; i++ ) {
     54 			source = iframes[ i ];
     55 
     56 			if ( e.source !== source.contentWindow ) {
     57 				continue;
     58 			}
     59 
     60 			source.removeAttribute( 'style' );
     61 
     62 			/* Resize the iframe on request. */
     63 			if ( 'height' === data.message ) {
     64 				height = parseInt( data.value, 10 );
     65 				if ( height > 1000 ) {
     66 					height = 1000;
     67 				} else if ( ~~height < 200 ) {
     68 					height = 200;
     69 				}
     70 
     71 				source.height = height;
     72 			}
     73 
     74 			/* Link to a specific URL on request. */
     75 			if ( 'link' === data.message ) {
     76 				sourceURL = document.createElement( 'a' );
     77 				targetURL = document.createElement( 'a' );
     78 
     79 				sourceURL.href = source.getAttribute( 'src' );
     80 				targetURL.href = data.value;
     81 
     82 				/* Only continue if link hostname matches iframe's hostname. */
     83 				if ( targetURL.host === sourceURL.host ) {
     84 					if ( document.activeElement === source ) {
     85 						window.top.location.href = data.value;
     86 					}
     87 				}
     88 			}
     89 		}
     90 	};
     91 
     92 	function onLoad() {
     93 		if ( loaded ) {
     94 			return;
     95 		}
     96 
     97 		loaded = true;
     98 
     99 		var isIE10 = -1 !== navigator.appVersion.indexOf( 'MSIE 10' ),
    100 			isIE11 = !!navigator.userAgent.match( /Trident.*rv:11\./ ),
    101 			iframes = document.querySelectorAll( 'iframe.wp-embedded-content' ),
    102 			iframeClone, i, source, secret;
    103 
    104 		for ( i = 0; i < iframes.length; i++ ) {
    105 			source = iframes[ i ];
    106 
    107 			if ( ! source.getAttribute( 'data-secret' ) ) {
    108 				/* Add secret to iframe */
    109 				secret = Math.random().toString( 36 ).substr( 2, 10 );
    110 				source.src += '#?secret=' + secret;
    111 				source.setAttribute( 'data-secret', secret );
    112 			}
    113 
    114 			/* Remove security attribute from iframes in IE10 and IE11. */
    115 			if ( ( isIE10 || isIE11 ) ) {
    116 				iframeClone = source.cloneNode( true );
    117 				iframeClone.removeAttribute( 'security' );
    118 				source.parentNode.replaceChild( iframeClone, source );
    119 			}
    120 		}
    121 	}
    122 
    123 	if ( supportedBrowser ) {
    124 		window.addEventListener( 'message', window.wp.receiveEmbedMessage, false );
    125 		document.addEventListener( 'DOMContentLoaded', onLoad, false );
    126 		window.addEventListener( 'load', onLoad, false );
    127 	}
    128 })( window, document );