modified file_gallery_check_attachment_originality for single post_id

gistfile1.aw

<?php
add_action( 'admin_footer', 'file_gallery_check_attachment_originality' ));		
function press_gallery_check_attachment_originality() {
		
		$find_screen = - 1;
		if (is_admin ()) {
			$find_screen = ('upload' == get_current_screen ()->base) ? 1 : 0;
		} else {
			$find_screen = ('create' == xxx_view () || 'edit' == xxx_view ()) ? 1 : 0;
		}
			if ($find_screen != - 1 && ! empty ( $_POST ['found_post_id'] )) {
				$id = $_POST ['found_post_id'];
				$copy = '';
				$original = '';
				if (! empty ( $id )) {
					$a = get_post_meta ( $id, '_has_copies' );
					$b = get_post_meta ( $id, '_is_copy_of' ) ;
					$original = ! empty ( $a ) ? $id : '';
					$copy 	  = ! empty ( $b ) ? $id : '';
				}
				if (! empty ( $original ) || ! empty ( $copiy )) {
					$original = ! empty ( $original ) ? '"#post-' . $original : 'null';
					$copy = ! empty ( $copy ) ? '"#post-' . $copy : 'null';
				}
				?>
<script type="text/javascript">
				var file_gallery_originals = <?php echo $original; ?>,
					file_gallery_copies = <?php echo $copy; ?>;

				if( null !== file_gallery_originals)
					jQuery(file_gallery_originals).addClass("attachment-original");
				
				if( null !== file_gallery_copies)
					jQuery(file_gallery_copies).addClass("attachment-copy");
			</script>
<?php
			}
		}
?>