/** Copyright 2014 Colm Delaney
 * Released under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 *
 * To use this file, remove .txt extension, and place it within the appropriate project directory
 */
// Detect whether scrollbars are present and if document is scrolled and add/remove appropriate classes
// Run on document.ready, window.resize and (optionally) on window.scroll
// usage: $('html').add_scroll_classes();
(function($) {
	$.fn.add_scroll_classes = function() {

		// (re)initialise to "no scrollbars" state
		$(this).removeClass('no-scroll no-vertical-scroll no-horizontal-scroll scroll vertical-scroll horizontal-scroll not-scrolled not-scrolled-vertically not-scrolled-horizontally scrolled scrolled-vertically scrolled-horizontally').addClass('no-scroll no-vertical-scroll no-horizontal-scroll not-scrolled not-scrolled-vertically not-scrolled-horizontally');

		if ($(document).height() > $(window).height()) {
			$(this).removeClass('no-scroll no-vertical-scroll').addClass('scroll vertical-scroll');
			if ($(document).scrollTop() > 0) {
				$(this).removeClass('scrolled not-scrolled not-scrolled-vertically').addClass('scrolled scrolled-vertically');
			}
		}

		if ($(document).width() > $(window).width()) {
			$(this).removeClass('no-scroll no-horizontal-scroll').addClass('scroll horizontal-scroll');
			if ($(document).scrollLeft() > 0) {
				$(this).removeClass('scrolled not-scrolled not-scrolled-horizontally').addClass('scrolled scrolled-horizontally');
			}
		}

	};
})(jQuery);