nsfontmanager_list_family_faces.swift

func textViewDidChangeTypingAttributes(notification: NSNotification) {
	if let font = textView?.typingAttributes[NSFontAttributeName] as? NSFont {
		if let faces = NSFontManager.sharedFontManager().availableMembersOfFontFamily(font.familyName) {        
			// faces is an array of arrays like this:
			// [[Helvetica, Regular, 5, 0], [Helvetica-Light, Light, 3, 0], [Helvetica-Oblique, Oblique, 5, 1], [Helvetica-LightOblique, Light Oblique, 3, 1], [Helvetica-Bold, Bold, 9, 2], [Helvetica-BoldOblique, Bold Oblique, 9, 3]]        
			fontFacesLabels = faces.map({face in (face[1] as! String)})        
		}
	}
}