Bounding rects

[artemnovichkov]

Add bounding rect calculation to Text object like:

    ///Returns the bounding rectangle required to draw the string.
    ///
    /// - Parameters:
    ///   - size: The width and height constraints to apply when computing the string’s bounding rectangle.
    ///   - options: Additional drawing options to apply to the string during rendering.
    ///   - context: A context object with information about how to adjust the font tracking and scaling information.
    /// On return, the specified object contains information about the actual values used to render the string.
    /// This parameter is nil by default.
    ///   - state: The control state for attributes.
    /// - Returns: A rectangle whose size component indicates the width and height required to draw the entire contents of the string.
    public func boundingRect(with size: CGSize,
                             options: NSStringDrawingOptions = [.usesLineFragmentOrigin, .usesFontLeading],
                             context: NSStringDrawingContext? = nil,
                             for state: ControlState = .normal) -> CGRect {
        guard let attributedString = attributed(for: state) else {
            return .zero
        }
        return attributedString.boundingRect(with: size, options: options, context: context)
    }