Shortcode_Button::ajax_parse_shortcode PHP Method

    public static function ajax_parse_shortcode()
    {
        global $wp_scripts;
        static $once = false;
        if ($once) {
            return;
        }
        $once = true;
        if (empty($_POST['shortcode'])) {
            wp_send_json_error();
        }
        $slug = sanitize_text_field($_POST['type']);
        $full_shortcode = wp_kses_post(wp_unslash($_POST['shortcode']));
        $shortcode = do_shortcode($full_shortcode);
        if (empty($shortcode)) {
            wp_send_json_error(array('type' => 'no-items', 'message' => __('No items found.')));
        }
        $head = '';
        $styles = wpview_media_sandbox_styles();
        foreach ($styles as $style) {
            $head .= '<link type="text/css" rel="stylesheet" href="' . $style . '">';
        }
        if (!empty($wp_scripts)) {
            $wp_scripts->done = array();
        }
        ob_start();
        echo $shortcode;
        $send = array('head' => $head, 'body' => ob_get_clean());
        $send = apply_filters("shortcode_button_parse_mce_view_before_send", $send);
        $send = apply_filters("shortcode_button_parse_mce_view_before_send_{$slug}", $send);
        self::send_json_success($send);
    }