Media: Trim whitespace in URLs provided for external embeds.

Also avoid showing error notice in media widget when URL field is empty.

Props timmydcrawford, westonruter.
Fixes #40771.

Built from https://develop.svn.wordpress.org/trunk@40772


git-svn-id: http://core.svn.wordpress.org/trunk@40630 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/widgets/media-widgets.js

@@ -142,9 +142,6 @@ wp.mediaWidgets = ( function( $ ) {
 					/**
 					 * Fetch media.
 					 *
-					 * This is a TEMPORARY measure until the WP API supports an oEmbed proxy endpoint. See #40450.
-					 *
-					 * @see https://core.trac.wordpress.org/ticket/40450
 					 * @returns {void}
 					 */
 					fetch: function() {
@@ -154,6 +151,12 @@ wp.mediaWidgets = ( function( $ ) {
 							embedLinkView.dfd.abort();
 						}
 
+						// Abort if the URL field was emptied out.
+						if ( ! embedLinkView.model.get( 'url' ) ) {
+							embedLinkView.setErrorNotice( '' );
+							return;
+						}
+
 						fetchSuccess = function( response ) {
 							embedLinkView.renderoEmbed({
 								data: {

wp-includes/js/media-views.js

@@ -4739,7 +4739,7 @@ EmbedUrl = View.extend({
 	},
 
 	url: function( event ) {
-		this.model.set( 'url', event.target.value );
+		this.model.set( 'url', $.trim( event.target.value ) );
 	},
 
 	/**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-beta1-40771';
+$wp_version = '4.8-beta1-40772';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.