When inserting a video shortcode into the editor, set the poster attribute automatically if the video has a featured image attached to it.

See #27460.


Built from https://develop.svn.wordpress.org/trunk@27659


git-svn-id: http://core.svn.wordpress.org/trunk@27502 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-editor.js

@@ -189,6 +189,10 @@
 			shortcode = {};
 
 			if ( 'video' === type ) {
+				if ( attachment.image ) {
+					shortcode.poster = attachment.image.src;
+				}
+
 				if ( attachment.width ) {
 					shortcode.width = attachment.width;
 				}

wp-includes/js/tinymce/skins/wordpress/wp-content.css

@@ -295,6 +295,7 @@ audio {
 	border-color: rgba(0,0,0,0.3);
 }
 
+.wpview-type-video .track-details,
 .wpview-type-audio .track-details {
 	position: absolute;
 	top: 0;