/* Copyright (c) 2015 Hyunje Alex Jun and other contributors
 * Licensed under the MIT License
 */
'use strict';

var d = require('../lib/dom')
  , h = require('../lib/helper')
  , instances = require('./instances')
  , updateGeometry = require('./update-geometry');

module.exports = function (element) {
  var i = instances.get(element);

  // Recalcuate negative scrollLeft adjustment
  i.negativeScrollAdjustment = i.isNegativeScroll ? element.scrollWidth - element.clientWidth : 0;

  // Recalculate rail margins
  d.css(i.scrollbarXRail, 'display', 'block');
  d.css(i.scrollbarYRail, 'display', 'block');
  i.railXMarginWidth = h.toInt(d.css(i.scrollbarXRail, 'marginLeft')) + h.toInt(d.css(i.scrollbarXRail, 'marginRight'));
  i.railYMarginHeight = h.toInt(d.css(i.scrollbarYRail, 'marginTop')) + h.toInt(d.css(i.scrollbarYRail, 'marginBottom'));

  // Hide scrollbars not to affect scrollWidth and scrollHeight
  d.css(i.scrollbarXRail, 'display', 'none');
  d.css(i.scrollbarYRail, 'display', 'none');

  updateGeometry(element);

  d.css(i.scrollbarXRail, 'display', '');
  d.css(i.scrollbarYRail, 'display', '');
};