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* Prevent loading `wp-embed` script unconditionally on every page in favor of conditionally enqueueing when a post embed is detected. The `wp-embed` script is also explicitly marked as being in the footer group. Sites which currently disable post embed scripts from being enqueued via `remove_action( 'wp_head', 'wp_oembed_add_host_js' )` will continue to do so. * Send a `ready` message from the host page to each post embed window in case the `iframe` loads before the `wp-embed` script does. When the `ready` message is received by the post embed window, it sends the same `height` message as it sends when it loads. * Eliminate use of `grunt-include` to inject emoji script and the post embed script. Instead obtain the script contents via `file_get_contents()` (as is done elsewhere in core) and utilize `wp_print_inline_script_tag()`/`wp_get_inline_script_tag()` to construct out the script. This simplifies the logic and allows the running of src without `SCRIPT_DEBUG` enabled. * For the embed code that users are provided to copy for embedding outside of WP, add the `secret` on the `blockquote` and `iframe`. This ensures the `blockquote` will be hidden when the `iframe` loads. The embed code in question is accessed here via `get_post_embed_html()`. Props westonruter, swissspidy, pento, flixos90, ocean90. Fixes #44632, #44306. Built from https://develop.svn.wordpress.org/trunk@52132 git-svn-id: http://core.svn.wordpress.org/trunk@51724 1a063a9b-81f0-0310-95a4-ce76da25c4cd
146 lines
3.6 KiB
JavaScript
146 lines
3.6 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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* This file cannot have ampersands in it. This is to ensure
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* it can be embedded in older versions of WordPress.
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* See https://core.trac.wordpress.org/changeset/35708.
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*/
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(function ( window, document ) {
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'use strict';
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var supportedBrowser = false,
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loaded = false;
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if ( document.querySelector ) {
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if ( window.addEventListener ) {
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supportedBrowser = true;
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}
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}
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/** @namespace wp */
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window.wp = window.wp || {};
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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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if ( ! data ) {
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return;
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}
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if ( ! ( data.secret || data.message || data.value ) ) {
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return;
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}
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if ( /[^a-zA-Z0-9]/.test( data.secret ) ) {
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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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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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/* Resize the iframe on request. */
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if ( 'height' === data.message ) {
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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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}
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/* Link to a specific URL on request. */
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if ( 'link' === data.message ) {
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sourceURL = document.createElement( 'a' );
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targetURL = document.createElement( 'a' );
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sourceURL.href = source.getAttribute( 'src' );
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targetURL.href = data.value;
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/* Only continue if link hostname matches iframe's hostname. */
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if ( targetURL.host === sourceURL.host ) {
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if ( document.activeElement === source ) {
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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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};
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function onLoad() {
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if ( loaded ) {
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return;
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}
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loaded = true;
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var isIE10 = -1 !== navigator.appVersion.indexOf( 'MSIE 10' ),
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isIE11 = !!navigator.userAgent.match( /Trident.*rv:11\./ ),
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iframes = document.querySelectorAll( 'iframe.wp-embedded-content' ),
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iframeClone, 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 ).substr( 2, 10 );
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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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/* Remove security attribute from iframes in IE10 and IE11. */
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if ( ( isIE10 || isIE11 ) ) {
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iframeClone = source.cloneNode( true );
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iframeClone.removeAttribute( 'security' );
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source.parentNode.replaceChild( iframeClone, source );
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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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if ( supportedBrowser ) {
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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.addEventListener( 'load', onLoad, false );
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}
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})( window, document );
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