GravityView - Add body classes when View is being rendered

gravityview-body-class.php

<?php

/**
 * Add body class for GravityView contexts
 */
add_filter('body_class', function( $classes = array() ) {

	if ( ! class_exists( '\GV\View_Collection' ) ) {
		return $classes;
	}

	global $post;

	// Edit Entry, Single Entry, or Multiple Entries for View CPT 
	if( $context = gravityview_get_context() ) {
		$classes[] = 'gravityview-' . $context;
	} 
	// Embedded Multiple Entries
	else if ( $views = \GV\View_Collection::from_post( $post ) ) {
		$classes[] = 'gravityview-directory';
	}

	return $classes;
});