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a2cdce6c82
* Remove obsolete `load` event handler in `wp-embed` since IE10+ support `DOMContentLoaded`.
* Replace obsolete use of `document.createElement('a')` in favor of the newer `URL` class (supported in all browsers but obsolete IE11).
* Remove obsolete IE10/IE11 code.
* Combine conditionals.
* Use `substring()` instead of deprecated `substr()` method.
* Eliminate the stipulation that `wp-embed.js` not include ampersands, considering this was put in place for WP<4.3 which now accounts for only 1.43% of sites. This includes the elimination of the `verify:wp-embed` grunt task.
Props westonruter, swissspidy.
Fixes #58974.
Built from https://develop.svn.wordpress.org/trunk@56383
git-svn-id: http://core.svn.wordpress.org/trunk@55895 1a063a9b-81f0-0310-95a4-ce76da25c4cd
119 lines
3.1 KiB
JavaScript
119 lines
3.1 KiB
JavaScript
/**
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* WordPress inline HTML embed
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*
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* @since 4.4.0
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* @output wp-includes/js/wp-embed.js
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*
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* Single line comments should not be used since they will break
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* the script when inlined in get_post_embed_html(), specifically
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* when the comments are not stripped out due to SCRIPT_DEBUG
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* being turned on.
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*/
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(function ( window, document ) {
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'use strict';
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/* Abort for ancient browsers. */
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if ( ! document.querySelector || ! window.addEventListener || typeof URL === 'undefined' ) {
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return;
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}
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/** @namespace wp */
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window.wp = window.wp || {};
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/* Abort if script was already executed. */
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if ( !! window.wp.receiveEmbedMessage ) {
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return;
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}
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/**
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* Receive embed message.
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*
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* @param {MessageEvent} e
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*/
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window.wp.receiveEmbedMessage = function( e ) {
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var data = e.data;
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/* Verify shape of message. */
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if (
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! ( data || data.secret || data.message || data.value ) ||
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/[^a-zA-Z0-9]/.test( data.secret )
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) {
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return;
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}
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var iframes = document.querySelectorAll( 'iframe[data-secret="' + data.secret + '"]' ),
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blockquotes = document.querySelectorAll( 'blockquote[data-secret="' + data.secret + '"]' ),
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allowedProtocols = new RegExp( '^https?:$', 'i' ),
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i, source, height, sourceURL, targetURL;
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for ( i = 0; i < blockquotes.length; i++ ) {
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blockquotes[ i ].style.display = 'none';
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}
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for ( i = 0; i < iframes.length; i++ ) {
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source = iframes[ i ];
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if ( e.source !== source.contentWindow ) {
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continue;
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}
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source.removeAttribute( 'style' );
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if ( 'height' === data.message ) {
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/* Resize the iframe on request. */
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height = parseInt( data.value, 10 );
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if ( height > 1000 ) {
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height = 1000;
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} else if ( ~~height < 200 ) {
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height = 200;
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}
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source.height = height;
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} else if ( 'link' === data.message ) {
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/* Link to a specific URL on request. */
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sourceURL = new URL( source.getAttribute( 'src' ) );
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targetURL = new URL( data.value );
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if (
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allowedProtocols.test( targetURL.protocol ) &&
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targetURL.host === sourceURL.host &&
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document.activeElement === source
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) {
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window.top.location.href = data.value;
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}
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}
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}
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};
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function onLoad() {
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var iframes = document.querySelectorAll( 'iframe.wp-embedded-content' ),
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i, source, secret;
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for ( i = 0; i < iframes.length; i++ ) {
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/** @var {IframeElement} */
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source = iframes[ i ];
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secret = source.getAttribute( 'data-secret' );
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if ( ! secret ) {
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/* Add secret to iframe */
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secret = Math.random().toString( 36 ).substring( 2, 12 );
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source.src += '#?secret=' + secret;
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source.setAttribute( 'data-secret', secret );
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}
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/*
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* Let post embed window know that the parent is ready for receiving the height message, in case the iframe
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* loaded before wp-embed.js was loaded. When the ready message is received by the post embed window, the
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* window will then (re-)send the height message right away.
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*/
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source.contentWindow.postMessage( {
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message: 'ready',
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secret: secret
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}, '*' );
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}
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}
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window.addEventListener( 'message', window.wp.receiveEmbedMessage, false );
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document.addEventListener( 'DOMContentLoaded', onLoad, false );
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})( window, document );
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