trait MarkupTrait

trait MarkupTrait {
    
    /**
     * The safe string.
     *
     * @var string
     */
    protected $string;
    
    /**
     * Creates a Markup object if necessary.
     *
     * If $string is equal to a blank string then it is not necessary to create a
     * Markup object. If $string is an object that implements MarkupInterface it
     * is returned unchanged.
     *
     * @param mixed $string
     *   The string to mark as safe. This value will be cast to a string.
     *
     * @return string|\Drupal\Component\Render\MarkupInterface
     *   A safe string.
     */
    public static function create($string) {
        if ($string instanceof MarkupInterface) {
            return $string;
        }
        $string = (string) $string;
        if ($string === '') {
            return '';
        }
        $safe_string = new static();
        $safe_string->string = $string;
        return $safe_string;
    }
    
    /**
     * Returns the string version of the Markup object.
     *
     * @return string
     *   The safe string content.
     */
    public function __toString() {
        return $this->string;
    }
    
    /**
     * Returns the string length.
     *
     * @return int
     *   The length of the string.
     */
    public function count() : int {
        return mb_strlen($this->string);
    }
    
    /**
     * Returns a representation of the object for use in JSON serialization.
     *
     * @return string
     *   The safe string content.
     */
    public function jsonSerialize() : string {
        return $this->__toString();
    }

}