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/**
 * @license http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 * @author Julien TRAJMAN <[email protected]> <@AgenceSoon>
 * @copyright Copyright (c) 2018 Agence Soon (http://www.agence-soon.fr)
 */
define([
    'jquery',
    'domReady!'
], function ($) {
    'use strict'

    $.widget('soon.backtotop', {
        _create: function () {
            this.jqWindow = $(window)
            this.jqHtmlBody = $('html, body')

            /**
             * Hide by default and check for display
             */
            this.checkBackToTop()

            this.element.on('click', function (e) {
                e.preventDefault()

                this.jqHtmlBody.animate({scrollTop: 0}, 1500, function () {
                    this.destroyScrollListener()
                }.bind(this))

                /**
                 * Break animation prematurely on some scroll related events
                 */
                this.jqHtmlBody.on('scroll mousedown wheel DOMMouseScroll mousewheel keyup touchmove', function () {
                    this.jqHtmlBody.stop()
                    this.destroyScrollListener()
                }.bind(this))
            }.bind(this))

            this.jqWindow.on('scroll', function () {
                this.checkBackToTop()
            }.bind(this))
        },

        checkBackToTop: function () {
            if (this.jqWindow.scrollTop() > 100) {
                this.element.removeClass('fadeout')
                this.element.addClass('fadein')
            } else {
                this.element.removeClass('fadein')
                this.element.addClass('fadeout')
            }
        },
        /**
         * Destroy scroll listener
         */
        destroyScrollListener: function () {
            this.jqHtmlBody.off('scroll mousedown wheel DOMMouseScroll mousewheel keyup touchmove')
        }
    })

    return $.soon.backtotop
})